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Mention de date : Année 1987
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The better utilisation of the Buffalo / C. R. Janakiram in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The better utilisation of the Buffalo Type de document : texte imprimé Auteurs : C. R. Janakiram, Auteur Année de publication : 1987 Article en page(s) : p. 1-6 Langues : Anglais (eng) Catégories : Cuirs et peaux
Cuirs et peaux de bufflesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : An exercise in the assessment of technology and its future is always important in the leather industry. The general decline in the quality and availability of raw hides and skins and the increasing costs of labour and overheads lead continuously to improving processing techniques and applying new chemicals. The same factors lead to making maxium use of the available hides and skins. In this paper the importance of the buffalo is analysed to try to asist with its fuller and better utilisation in India and in other countries.
The buffalo (or Bubalus bubalus to give it its official title) is a domestic animal in India, Indo-China, East Indies, Philippines, Burma and Malaya and has also been introduced in Egypt, Italy and Hungary. In Thailand and the Philippines, there are more buffaloes than cattle and they are considered a major source draught power. In Pakistan, buffalo mils accounts for 70 % of the total milk production. An estimated 117000 tonnes of buffalo meat are produced annually from slaughtered animals in India and regular production of meat and meat products take place in urban centres and rural feeder centres. The present 66 million buffalo population is expected to grow to 75 million by AD2000 and, out of this, at least one-third could be taken for slaughtering each year. India has an annual production of 10 million buffalo hides and skins, amounting to some 46 % of the world total. Major problems exist in the high incidence of grain defects, flaying defects and delays in curing, exaggerated by the fact 80 % of the hides are recovered from dead animals and only 20 % from slaughtered animals.
Raw hides are classified into different categories according to their weight, or size and quality. They are marketed on the basis either of weight ranges of classified hides. The question is whether hides and skins can be more fully utilised for the manufacture of a wider variety of leathers. Experience in India and other countries clearly indicates very good possibilities which merit further investigation and development.Note de contenu : - Structure of buffalo hide.
- Structure of buffalo calfskin.
- El processing.
- Manufacture of chrome tanned buffalo.
- Finishing.En ligne : https://drive.google.com/file/d/1Svg7N8su2AxvI_D1t7rL3OlL09_ueWtf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9140
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The structural features of processed sheepskin splits, as viewed in conjuction with various histological and microscopical techniques / T. M. van Gulik in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The structural features of processed sheepskin splits, as viewed in conjuction with various histological and microscopical techniques Type de document : texte imprimé Auteurs : T. M. van Gulik, Auteur ; P. J. Klopper, Auteur Année de publication : 1987 Article en page(s) : p. 7-9 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The morphology of sheepskin splits was studied at the completion of the beamhouse processes and after a tanning procedure with glutaraldehyde had been effected. A selection of histological and microscopical methods was applied. The combination of Masson's trichrome stain and differential-interference contrast microscopy resulted in an optical relief effect on the dermal fibre system.
Using reflected light microscopy, the fibrous structure of the tanned splits could be examined directly, without requiring any form of histological processing. Scanning electron microscopy demonstrated most appropriately, fibre bundle separation and splitting.
The unit-fibre was defined, measuring 5 µm and being composed of numerous collagen fibrils. After tannage, the fibre bundles appeared densely packed with markedly reduced fibre bundle splitting.En ligne : https://drive.google.com/file/d/19dkp5EkL8tu6OLPeSV9Ic-nl85Jik8kC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9141
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 7-9[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible A simple method for the combined determination of both zirconium and aluminium in leather and tanning solutions / L. J. Stephens in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : A simple method for the combined determination of both zirconium and aluminium in leather and tanning solutions Type de document : texte imprimé Auteurs : L. J. Stephens, Auteur Année de publication : 1987 Article en page(s) : p. 10-11 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The determination of zirconium and aluminium in solution has been documented previously and the complexometric titration method for zirconium using EDTA has proved successful for rapid and single analyses of both tanning baths and leather in this laboratory. During experiments with zirconium tanning in the presence of high concentrations of aluminium, a method was developed for determining both metals, with one simple titration, without the usual need to separate the two prior to analysis.
The preferred method of analysis for aluminium when titrating with EDTA involves a back-titration in the presence of excess EDTA. Determination of aluminium by direct titration, due to its slow reaction with the low concentration of EDTA available at acid pH., causes difficulty in assessing the end-point. Also, the interference by aluminium in the titration of zirconium with EDTA is due to some reaction of the aluminium under the titration conditions. As this reaction is slow and pH-dependent, a study of titre versus pH was undertaken to determine if there were conditions where each metal could be titrated independently of the other. The method developed gave reduced accuracy for aluminium analysis compared with the back-titration method or with the standard method using CDTA as titrant.En ligne : https://drive.google.com/file/d/19XSmwok4OHLshotyO5RUABq5atl116Hx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9142
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 10-11[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Modern leather requirements / C. D. Hey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Modern leather requirements Type de document : texte imprimé Auteurs : C. D. Hey, Auteur Année de publication : 1987 Article en page(s) : p. 12-14 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Operating in the area of consultancy in leather and shoe manufacture, after many years working directly for tanners and shoemakers, has focused my attention on several topics of real importance. Advances, particularly in shoemaking techniques are occuring faster than the leather industry is capable of responding.
Although for many years specifications and test procedures have centred on flex resistance and rub fastness, for example, tomorrow's requirements assume that a sufficient level of these properties will be consistently provided, leaving room for other, more advanced, technical developments.
This paper will be centred on the six following topics :
(a) leathers suitable for footwear manufactured by the polyurethane injection soling technique,
(b) consumer benefit,
(c) rapid fashion response,
(d) commercial realities,
(e) consistency of supply and
(f) patent leather.En ligne : https://drive.google.com/file/d/1mhisFP7IDe0p5_4Kl4OLvSMOZgWrSBiO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9143
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 12-14[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Utilisation of hide waste for the production of high-protein feed meals on the basis of a "collagen amino-acid index" / J. Zuchowski in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Utilisation of hide waste for the production of high-protein feed meals on the basis of a "collagen amino-acid index" Type de document : texte imprimé Auteurs : J. Zuchowski, Auteur Année de publication : 1987 Article en page(s) : p. 15-16 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1-_V61hTKcnDZI32gkyC16ogNCQkpoAAT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9144
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 15-16[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible International fastness test commission : draft methods IUF 421, IUF 426 and IUF 450 / J. Gauglhofer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : International fastness test commission : draft methods IUF 421, IUF 426 and IUF 450 Type de document : texte imprimé Auteurs : J. Gauglhofer, Auteur Année de publication : 1987 Article en page(s) : p. 21-25 Langues : Anglais (eng) Tags : Cuir 'Draft method' 'Stabilité couleur' Transpiration Eau Frottage Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1Q2g2bgCRsrQd3FplmiIex5H-LLYhYg5e/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9145
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 21-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Method for calculation of total composition of leather / A. W. Landmann in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Method for calculation of total composition of leather Type de document : texte imprimé Auteurs : A. W. Landmann, Auteur Année de publication : 1987 Article en page(s) : p. 25-26 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1IHPy_M_UCAbxVrAYGL0fXk0g6voiL-Ft/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9146
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 25-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The mechanical properties of sheepskin splits as determined by an experimental method / T. M. van Gulik in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The mechanical properties of sheepskin splits as determined by an experimental method Type de document : texte imprimé Auteurs : T. M. van Gulik, Auteur ; P. J. Klopper, Auteur Année de publication : 1987 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sheepskin flesh splits which had undergone all beamhouse processes were tanned with glutaraldehyde, producing three increasing degrees of tannage according to the resultant elevation of the shrinkage temperature (Ts). The respective specimens were referred to as GA low-grade (Ts60.3+-0.7°C, n=10), GA medium-grade (TS 67.7+-1.2°C, n=15) and GA high-grade (TS 74.8+-0.8°C, n=36).
The thickness, tensile strength and elongation at break of untanned of the specimens were assessed, applying an experimental testing procedure. The thickness of the specimens correlated negatively with the degree of tannage (r=0.78). The tensile strength of the GA high-grade tanned specimens equalled 30.8+-3.6 N/mm2 (n30), corresponding with an increase in tensile strength of approximately 20 %, as compared with the untanned specimens. The tensile strength values of GA low, medium and high grade tanned specimens, did not differ significantly. The elongation at break of the tanned specimens correlated negatively with the degree of tannage (r=-0.68). The stress/strain curves recorded exhibited a sigmoid shape.En ligne : https://drive.google.com/file/d/1ywSwzNYrUv0Di6QuIDswW-cMVFVI7sYP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9147
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 38-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Introduction to industrial drying / P. J. Hulls in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Introduction to industrial drying Type de document : texte imprimé Auteurs : P. J. Hulls, Auteur Année de publication : 1987 Article en page(s) : p. 43-46 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : Convection / Radiation / Mechanical / 1. Electric conversion ovens / 2. Heat pump dehumidification / 3. Dessicant dehumidification / 4. Electric production of steam and hot water for heating - Infrared drying / 6. Dielectric heating / 7. Ultra violet / 8. Air knives. En ligne : https://drive.google.com/file/d/1eQ1fLRuNnsw2mnXW7Ginq8F6wuA5So5V/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9148
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 43-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Short paper : some notes on the production of a tanning extract / H. Anderson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Short paper : some notes on the production of a tanning extract Type de document : texte imprimé Auteurs : H. Anderson, Auteur Année de publication : 1987 Article en page(s) : p. 47-48 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Subsequent to the closure of Industrial Extracts Ltd (manufacturers of "Myrtan" tanning extract) several friends suggested to me that a knowledge of the could be of interest to other chemists in the industry.
The company was then confronted by an acute problem. The 1950s had seen intense competition between mimosa and quebracho inteerests which forced down prices to a level where "Myrtan", with its handicaps of poor colour and solubility, could no longer continue to undersell its competition.
Fortunately, sales of "Myrtan" as a "mud thinner" in the drilling of oil wells were buoyant until a range of new thinners based on iron and chromium lignosulphonates was introduced which, although expensive, showed vastly improved performance. This left the company with no option but to try to recover its market in the leather industry and in 1960 work started with this in view.
At the time, the process was operated in the following way. Logs of Eucalyptus redunca and E. accadens were reduced to a rough sawdust in conventional hoggers and extraction was carried out in two sets of stainless steel vessels, each holding about five tons of wood, by a normal counter-current system. The vessels were air-tight so that liquors could be presse forward by the application of steam pressure at the tail of the system. The rate of extraction was such that, with the tail of the system at 100°C, the head liquor with about 5 % solubles ran off at about 65°C. The liquor was pumped straight to a three-stage evaporator, emerging at 200° Bk, and was then either spray-dried or finished as solid extract. The problems to be addressed were poor colour and poor solubility.Note de contenu : Colour / Sludge and solubility / Drilling mud thinners / Removal of iron from the extract / Rate of production. En ligne : https://drive.google.com/file/d/1lF6i4WAfLOV9ITBiKP08Mp_jF-1fcaEq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9149
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 47-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Alternatives to chromium tanning - Part III : effect of organic acid anions on aluminium sulphate tannage of collagen / K. C. Montgomery in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Alternatives to chromium tanning - Part III : effect of organic acid anions on aluminium sulphate tannage of collagen Type de document : texte imprimé Auteurs : K. C. Montgomery, Auteur Année de publication : 1987 Article en page(s) : p. 59-67 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Various aliphatic carboxylic acids and hydroxy-acids, aromatic carboxylic acids and phenols have been evaluated as masking agents for potential application in a solo aluminium sulphate tannage to replace conventional chromium tanning. Lamb intestine was used as the source of collagen and tanning effectiveness was assessed primarily by measurement of shrinkage temperature (Ts).
The importance of the presence and position of carboxyl and hydroxyl groups in both aliphatic and aromatic compounds has been demonstrated.
Phthalate is the most promising masking agent for the production of white aluminium tanned leather while ketomalonate, mucate, 2,4-dihydroxymandelate and gallate also produced useful increases in shrinkage temperature.
Citrate was confirmed as the stongest aliphatic complexing agent for basic aluminium sulphate and 2,3-dihydroxybenzoate was shown to be the strongest aromatic complexing agent.
The covalent introduction of these or related carboxylates into collagen is suggested as a means of increasing the effectiveness of aluminium tannage.En ligne : https://drive.google.com/file/d/15CKP4frBxFeCZ__dOu_ICpkxXJV2diOj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9155
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 59-67[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Studies on the defects and the economic losses on crust leather resulting from physical damage / K. E. E. Ibrahim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Studies on the defects and the economic losses on crust leather resulting from physical damage Type de document : texte imprimé Auteurs : K. E. E. Ibrahim, Auteur ; Mukhtar Taha Abu-Samra, Auteur Année de publication : 1987 Article en page(s) : p. 68-74 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the Sudan, 26 010 cattle, goats and sheep were surveyed for physical defects on hides and skins. Among 16540 cattle surveyed, the incidence of physical defects was 78,2 %. Branding and cauterisation were encountered among 77,4 % of the cattle surveyed. The damage caused by horn rake and scratches by thorns and barbed wire was low in incidence (0.8 %). Among 5250 goats and 4220 sheep surveyed, the incidence of physical damage was low 3,6 % in the former and 2,1 % in the latter species, most of the physical defects being due to scratches caused by thorns and barbed wire.
Branded and cauterised hides were green-graded as rejects. The damage produced was deep and visible even on the flesh side. Such hides were difficult to finish. Moreover, branding and cauterisation caused hardening, reduction in the cutting area and the grain surface of the leather was coarse and showed visible cracks.
Histological sections prepared from branded or cauterised areas showed marked degenerative changes, sloughing of the epidermis and/or scab formation ; the hair follicles were destroyed. There were petechial haemorrhages in the papillary layer and in the dermis. Both the epidermis and dermis showed scar tissue formation.
Leather sections showed distortion and disintegration of both transverse and longitudinal fibres. The fibres towards the grain surface were fluffy and without contours while the fibres beneath were stuck together and stouter than normal.
Leather sections showed distortion and disintegration of both transverse and longitudinal fibres. The fibres towards the grain surface were fluffy and without contours while the fibres beneath were stuck together and stouter than normal.
Leather specimens from branded and cauterised areas lost their durability and could not withstand physical testing. Rejected hides of this type fetched very low pricees resulting in serious economic losses.
An experiment was conducted on the effect of cauterisation on goat skins. The results obtained showed that the damage produced was irreparable through treatment. The data obtained from grading, examination of histological and leather sections and physical testing of the leather from the experimental goats, confirmed the data obtained from the survey. Cauterisation was shown to cause a marked reduction in thickness, weight, durability and apparent density.
It was suggested that animal owners and breeders should be taught to brand their animals on areas which would not affect the value of the hides ans skins and that the faulty practice of cauterisation should be prohibited completely.En ligne : https://drive.google.com/file/d/1klz0oUD6UR5Gbe_4UQ6CYrU_z5K2PkLI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9156
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Studies on the shrinkage temperature and mechanical properties of gamma-irradiated sheepskin splits / T. M. van Gulik in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Studies on the shrinkage temperature and mechanical properties of gamma-irradiated sheepskin splits Type de document : texte imprimé Auteurs : T. M. van Gulik, Auteur ; P. J. Klopper, Auteur Année de publication : 1987 Article en page(s) : p. 75-79 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sheepskin flesh splits which had undergone all beamhouse processes (Ts 44.5+-4.8°C), were gamma irradiated in the dry and wet states, the latter under conditions of reduced oxygen tension. Irradiation doses were increased from 2.5 up to 20 Mrad. In a second series, the split were tanned with glutaraldehyde (Ts 68.2+-0.7°C) prior to irradiation. The effects of irradiation on the Ts and on the mechanical properties (thickness, tensile strength and elongation at break) of the splits were assessed. Irradiation caused the untanned specimens to shrink considerably. The Mrad-irradiated specimen had contracted to 8 % of its original surface area and had become extremely brittle. The Ts of the untanned specimens was, however, not influencede by the irradiation. The 2.5 Mrad dry irradiation decreased the tensil strength of an untanned specimen to 23 % of its original value, whereas wet irradiation resulted in a decrease of 50 %. With the irradiated, glutaraldehyde tanned specimens, a dose-related, exponential decrease in both Ts (r=-0.97) and tensile strength (r=-0.88) was substantiated. With 2.5 Mrad irradiation, similarly in the dry and wet states, the tensile strength was reduced to 66 % of its original value before irradiation. The applied glutaraldehyde tannage offered a relative protection against the destructive effects of irradiation. En ligne : https://drive.google.com/file/d/1LOhUNLXAMIFo6vM4IzAG3WeRem0cZO0g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9157
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible IULTCS environment and waste commission in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : IULTCS environment and waste commission : Report of the meeting held in Reutlingen, Germany, in April 1986 Type de document : texte imprimé Année de publication : 1987 Article en page(s) : p. 82-88 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : REPORTS ON SPECIFIC TOPICS : Rawhide preservation - Unhairing and liming - Pickling and tanning - Post-tanning and finishing - Combined waste-water treatment - Visit - Specific criteria for discharges of liquid wastes - Utilisation of solid residues - Specific criteria for disposal of solid wastes - Air pollution - Charges for effluents and other wastes. En ligne : https://drive.google.com/file/d/1yqNoFKItunJB-J6RGfbKQ61X_Vgr6vze/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9158
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 82-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Modern day fatliquoring / R. Wyss in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Modern day fatliquoring Type de document : texte imprimé Auteurs : R. Wyss, Auteur Année de publication : 1987 Article en page(s) : p. 89-91 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Over the last decades, the technology of leather manufacturing has changed drastically due to scientific research, development and experience on the practical side. Further influences have been due to environmental legislation, changes in hide/skin raw materials rationalisation in production and labour costs among other factors. Because fatliquors play a very important part il leather production, manufacturers of fatliquors have to offer products according to those trends. Note de contenu : RAW OILS, FATLIQUORS AND EMULSIONS.
REQUIREMENTS OF THE FATLIQUOR USED ON THE LEATHER Behaviour towards water - Lightfastness - Fatliquoring in the dyeing bath - Flame retardation - Fixation - Finishing properties - Spues.
Practical aspects.
PRACTICAL ASPECTS : Standardised processes - Low float-high concentration - Fatliquor addition in several stages.En ligne : https://drive.google.com/file/d/1y546-0-Yh0iSYbQap2nP2x1fyPm1kVsp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9159
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 89-91[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Roller coating / P. Howarth in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Roller coating Type de document : texte imprimé Auteurs : P. Howarth, Auteur ; G. Wood, Auteur Année de publication : 1987 Article en page(s) : p. 97-99 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : Roller types / Speeds / Leather absorbancy / Viscosity / Leather types and conditions / Advantages / Disadvantages / Finishes / Machine care. En ligne : https://drive.google.com/file/d/1KON8ecQMbvpgYA6N4vfaYtb_N38ad6YD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9160
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The extraction and high performance liquid chromatography (HPLC) determination of TCMTB samples of treated wet blue / W. M. Fowler in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The extraction and high performance liquid chromatography (HPLC) determination of TCMTB samples of treated wet blue Type de document : texte imprimé Auteurs : W. M. Fowler, Auteur ; Alan E. Russell, Auteur ; I. H. Kruger, Auteur ; S. C. Pinchuck, Auteur Année de publication : 1987 Article en page(s) : p. 100-107 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The efficiency of extracting 2-(thiocyanomethylthio) benzothiazole (TCMTB) with dichloromethand from treated wet blue samples was investigated and the high performance liquid chromatography (HPLC) method of determining the extracted TCMTB is described. Of the methods investigated, the most efficient procedure for TCMTB extraction was found to be sonication in boiling dichloromethane for 30 min followed by a 7.5 h soxhlet extraction. Using this method, TCMTB was extracted from wet blue treated at various concentration levels and containing different moisture contents.
The amount of TCMTB increased with the amount offered during treatment, although not linearly. The amount extracted increased when the moisture content was lowered by sammying. The actual efficientcy of extraction method was determined in a mass balance experiment in which all masses and volumes were carefully monitored. The average extraction efficiency in treatments up to 0.25 % (m/m) fungicide offered in a 100 % float was 82 % of the total wet blue TCMTB content. An attempt was made to determine the ratio between the interstitial and the bound TCMTB which could have a bearing on the activity of the fungicide. After 30 days, less than 10 % of the TCMTB was present in the interstitial fluid.En ligne : https://drive.google.com/file/d/1t3tK8Y4oqZUftBT1PQKIqstUBSKGHBnB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9161
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 100-107[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible SEM studies on the morphology of grafted casein films / N. Somanathan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : SEM studies on the morphology of grafted casein films Type de document : texte imprimé Auteurs : N. Somanathan, Auteur ; V. Arumugam, Auteur ; R. Sanjeevi, Auteur ; T. S. Ranganathan, Auteur Année de publication : 1987 Article en page(s) : p. 108-110 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Casein, which is used as a protein finish, was grafted with acrylonitrile and n-butyl methacrylate in order to reduce its hydrophobicity. Grafting was undertaken at various concentration levels of the binary mixture. The surface morphology of these grafted films was studied using scanning electron microscopy. The morphology of samples, stretched up to 10 and 20 % levels, was also studied. The compatibility of the ungrafted polymer with that of grafted casein decreases when the concentration of the former is increased. En ligne : https://drive.google.com/file/d/1EgjsdSqt_3PTjwHjJ8BRJxL07EkJq7uS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9162
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 108-110[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The relationship between conductivity and dissolved solids in tannery wastewater / R. A Rowswell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The relationship between conductivity and dissolved solids in tannery wastewater Type de document : texte imprimé Auteurs : R. A Rowswell, Auteur ; Stanley G. Shuttleworth, Auteur ; Desmond R. Cooper, Auteur Année de publication : 1987 Article en page(s) : p. 111-114 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A study has been made of the relationship between conductivity and total dissolved solids, since the former is often used to monitor tannery wastewater because of its convenience. The results presented show that caution must be exercised in converting the one to the other by a standard factor because of the different types of salts present and their proportions. En ligne : https://drive.google.com/file/d/1iStznZUxFJydsamdi7JcZ2Z763w2B-Tq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9163
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The influence of compensatory growth on certain hide and leather characteristics / J. F. de Bruyn in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The influence of compensatory growth on certain hide and leather characteristics Type de document : texte imprimé Auteurs : J. F. de Bruyn, Auteur ; R. T. Naudé, Auteur ; M. C. Smit, Auteur ; E. J. Potgieter, Auteur ; A. Cloete, Auteur ; A. E. Russell, Auteur ; A. C. Galloway, Auteur ; W. A. Vosloo, Auteur Année de publication : 1987 Article en page(s) : p. 169-186 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Three groups of nine-month-old beef-type steers were fed on a high (treatment I), medium (treatment II) or low (treatment III) nutritional plane for a period of 21 weeks. At the end of this period five cattle of each treatment were slaughtered (average after 23 weeks). The remaining cattle of treatments II and III (the restricted gropus) were then also fed the high nutritional plane such as those from treatment I and allowed to grow to a final slaughter mass of 440 kg. Treatments were compared on an equal stage (0 weeks-control, 23 and 39 weeks) and mass basis (210 kg-control, 370 and 440 kg live mass) through the whole trial as far as certain hide characteristics were concerned. The most severely restricted animals (treatment III) had a lower hide fat percentage content than the moderately restricted (treatment II) and unrestricted animals (treatment I) slaughtered after 23 weeks in the trial. This was due to a decrease in the hide fat content of treatment III during the 23 week period. After a period of compensatory growth, however, no differences were found between the treatments in hide fat content and, therefore, in hide composition. The hide fat content did not increase evenly over the total growth period. The nutritional restriction and/or a subsequent period of compensatory growth had no effect on the solubility of the hide collagen, neither did the hide collagen solutiblity change during the growth process (increase in mass and time). No significant differences were found in the total hide collagen content between the treatments after a period of nutritional restriction (23 weeks). At the final slaughter points (39 weeks and 440 kg live mass), the unrestricted group (treatment I) had a higher total hide collagen content than the previously restricted groups (treatments II and III). The total hide collagen percentage content decreased with growth progress in all the groups. The most severely restricted animals had thinner hides and hide layers (grain and corium major) than the moderately restricted and unrestricted animals after 23 weeks. However, both the restricted groups had less hide corium fat (amount of fat cells) than the restricted group after a period of compensatory growth. Animal growth (i.e. increase in mass and time), was characterised by an increase in total hide and layer thickness and the amount of fat cells in the hide corium. The majority of the hide collagen fibres overlapped in the hide corium major with an angle of 45°. A small decline in this angle of collagen fibre overlapping was found with growth progress over the total trial period which might, because of the importance of this characteristic in hide strength, have an influence on hide and hence on leather characteristic. The connective tissue, elastin, was found to be concentrated mainly in the grain layer of the hide. En ligne : https://drive.google.com/file/d/1nKpFRshcuYW18YYPa-rja5cqtbBD5hHy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9164
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Alternatives to chromium tanning - Part IV : the stability of aluminium and other tannages in acidic solutions / K. C. Montgomery in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Alternatives to chromium tanning - Part IV : the stability of aluminium and other tannages in acidic solutions Type de document : texte imprimé Auteurs : K. C. Montgomery, Auteur Année de publication : 1987 Article en page(s) : p. 187-194 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Solo aluminium, combination aluminium and a range of other tannages were investigated for their stability under acidic conditions, particularly conditions likely to be encountered in woolskin dyeing. Most aluminium tannages, including the well-established vegetable-aluminium tannage, deteriorated under the conditions of a standard dyebath test method developed for this investigation. En ligne : https://drive.google.com/file/d/169AeChiAkRm-bzuTr7LYoK4TXcr_dw-l/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9169
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 187-194[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Dry tannage in solvent media / Wei Qing-Yuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Dry tannage in solvent media Type de document : texte imprimé Auteurs : Wei Qing-Yuan, Auteur Année de publication : 1987 Article en page(s) : p. 195-198 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tannery effluent containing chrome is one of the most troublesome problems, in the leather industry. The author has tried to develop a new process to resolve the problem and has found it possible to select a water-immiscible organic solvent, such as "light wax", to serve as the carrier. The chrome powder is not soluble in the carrier solvent but, by virtue of the small quantity of water held in the pelts, the chrome powder dissolves therein and penetrates quickly through the whole thickness of the pelts. The solvent can be used, repeatedly, without any other treatment.
After tanning, the solvent is separated readily on standing so that no chrome pollution is discharged. The equipment is simple, the technique is easy, the quality of the finished leather is excellent, the cost is reasonable and, finally, chrome contamination can be avoided. In addition, the water-immiscible organic solvent carrier provides a cushioning action such that the pelts can be rotated smoothly and as freely as in aqueous media. Since the bath is virtually dry, this method is described as "dry tannage in solvent media".En ligne : https://drive.google.com/file/d/1vYeXeCS8-bydgB4bMfZFlE3d_humftEo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9170
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 195-198[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The interaction of alkaline and bating processes on the production of upper leather from wet salted hide using different concentrations of sodium sulphide and of two bates / Momodou K. B. Drammeh in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The interaction of alkaline and bating processes on the production of upper leather from wet salted hide using different concentrations of sodium sulphide and of two bates Type de document : texte imprimé Auteurs : Momodou K. B. Drammeh, Auteur Année de publication : 1987 Article en page(s) : p. 202-204 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The proteolytic effect of liming and bating on wet salted hide to be made into upperleather has been investigated by varying the concentration of NaS in liming, i.e. 2 and 4 %, and two types of bate (3A and 5A each) at two cncentrations, i.e. 1-5 and 3 %.
The 2 % Na2S concentration in liming was combined with each concentration of both bates 3A and 5A. The same combinations with the 4 % Na2S concentration were also used, so that, effectively, eight batches were carried out.
Hydroxyproline determination by spectrophotometry was used to calculate collagen in the hide in the raw state, after liming and after bating. The mean mass of collagen was found to reduce progressively from raw to bated condition in all batches ; the batch to batch difference was not very marked. Visual and tactile examination between the Na2S concentrations, showed pelt from the 4 % Na2S treatment to be more plump and slippery.
Between the bate types and various concentrations, there was not much visual difference. Shrinkage temperature (Ts) values were higher in the raw pelt, declined slightly after liming and increased after bating. After chrome tanning, batches A, C, G and H hat Ts of 100°C and the rest all had Ts 98°C.En ligne : https://drive.google.com/file/d/1sZ5PgVc6C3XBJokacDp6UfJF3tMgiwkx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9171
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The application of catalysts and other additives to epoxy pretannage of hide / Mineo Masuoka in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The application of catalysts and other additives to epoxy pretannage of hide Type de document : texte imprimé Auteurs : Mineo Masuoka, Auteur ; Masashi Makamura, Auteur Année de publication : 1987 Article en page(s) : p. 127-133 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs
Catalyseurs
Composés organiques
Cuirs et peaux
Epoxydes
Prétannage
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The acceleration effect of catalysts and other additives on the rise in the shrinkage temperature of hide treated with various multifunctional, water-soluble, epoxy resins was investigated in order to obtain information on a new pre-tanning method without chrome. The wet acetone-dehydrated hide specimen was treated with 10% epoxy resin (on the wet hide weight) at 35°C. The catalysts, 2,4,6,-tris(dimethylaminomethyl)phenol and dimethylaminopropylamine, both show an acceleration effect on the rise in the shrinkage temperature of the treated hide. Processing with the combined catalyst of 2,4,6-tris(dimethylaminomethyl)phenol and salicylic acid can markedly raise the shrinkage temperature over 80°C after 10 h. The epoxy resins, which have higher functionality or lower molecular weight, can rapidly raise the shrinkage temperature. Additives, such as methanol and ammonia, contribute to raising the shrinking temperature considerably. On the other hand, acids and anions show a negative effect upon it. Note de contenu : - EXPERIMENTAL : Hide Preparation - Epoxy resins, catalysts, and other agents - Epoxy treatment and T measurement
- RESULTS AND DISCUSSION : Effect of Catalysts on T - Effect of molecular weight and functionality of resins on Ts - Effect of Concentration and Final pH on Ts - Effect of Other Additives on Ts -
- Table 1 : Chemical structure and molecular weight of epoxy resins used
- Table 2 : Chemical structure of catalysts and accelerator processedEn ligne : https://drive.google.com/file/d/13EBEb1DL8whL-oW6awyrNaO9KvWZXngS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40125
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Properties of leather produced from a sample of australian feral goats / P. J. Holst in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Properties of leather produced from a sample of australian feral goats Type de document : texte imprimé Auteurs : P. J. Holst, Auteur ; D. E. Peters, Auteur ; C. J. Allan, Auteur ; M. Pervez, Auteur Année de publication : 1987 Article en page(s) : p. 134-137 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Essais dynamiques
Mesure
Peau -- HistologieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effect of fibre diameter, fibre length and primary follicle density on grain appearance of the skin of Australian bush goats was assessed. Good grain appearance was associated with a high density of primary follicles that produce, on these animals, medullated fibres of a relatively uniform diameter.
Fine grained skins are produced by goats of less than approximately 25 kg liveweight. The physical properties of the leather, as measured by tensile strength, elongation and lastometer, were evaluated and found to be comparable to commercial quality goatskins. Nutrition was found to have an effect on skin substance and density and indirectly, through skin area, on grain appearance.Note de contenu : - METHODS : Animal - Metrology - Sampling for physical testing
- RESULTS AND DISCUSSION : General - Histological examination - Selection of test sites - Tensile strength, elongation and lastometer tests - Liveweight change and properties
- Table 1 : Fibre and follicle data for Group A yearling goats
- Table 2 : Medullated fibre length and diameter at three sites on Group A goats
- Table 3 : Fibre and follicle data for Group B, seven-month-old bush and crossbred
- Table 4 : Assessment of goat skin (number 11) for tensile strength, elongation and lastometer at three sample sites
- Table 5 : The effect of Iiveweight changes, in the eight weeks prior to slaughter, on skin density and substance (Group A)En ligne : https://drive.google.com/file/d/1NgUFMD81l1HGQTvJfRn6Zw923oi3naD5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40126
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The practical evaluation of fungicides / Amanda Bugby in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The practical evaluation of fungicides Type de document : texte imprimé Auteurs : Amanda Bugby, Auteur Année de publication : 1987 Article en page(s) : p. 138-141 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Conservation
FongicidesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Work has been conducted to determine the activity of several fungicides on wet chrome tanned material using the BLMRA laboratory fungicide test as approved by the National Testing Laboratory Accreditation Scheme (NATLAS). From this we are able to assess the cost effectiveness of different fungicides, enabling the tanner to make an accurate choice to suit his own particular requirements. In other studies we have investigated the distribution of fungicide within and between hides processed in commercial production lots. Note de contenu : - Part A : Procedure for determining biocidal activity
- PART B : Methods : Extraction and analysis for para-nitrophenol - Extraction and Analysis for Busan 30L2
- Table 1 : Fungicides evaluated
- Table 2 : Minimum concentration of fungicide for four against mould growth
- Table 3 : Cost of fungicides
- Table 4 : Extraction of fungicide from wet-blue before and after drying
- Fig. 1 : BLC method for fungicide evaluationEn ligne : https://drive.google.com/file/d/1yvWEjjaGFp7tTnDla_x-ZHafZ3qCVStf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40127
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Low molecular weight peptides from collagenous waste : Hydrodynamic and thermodynamic studies / Geetha Baskar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Low molecular weight peptides from collagenous waste : Hydrodynamic and thermodynamic studies Type de document : texte imprimé Auteurs : Geetha Baskar, Auteur ; K. Vijayalakshmi, Auteur ; V. V. M. Rao, Auteur ; Asit Baran Mandal, Auteur Année de publication : 1987 Article en page(s) : p. 142-146 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène -- Déchets
EthanolamineL'éthanolamine, également appelée 2-aminoéthanol ou monoéthanolamine, est un composé chimique organique qui est à la fois une amine primaire (par son groupe amine) et un alcool primaire (par son groupe hydroxyle). À l'instar des autres amines, la monoéthanolamine se comporte en base faible. L'éthanolamine est un liquide toxique, inflammable, corrosif, incolore et visqueux ; son odeur est similaire à celle de l'ammoniac.
Hydrodynamique
Peptides
Poids moléculaires
ThermodynamiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A transamidification reaction was utilised to obtain low molecular weight peptides by reacting waste skin trimmings protein with monoethanolamine (MEA). In sample, equal equivalent of protein and MBA were used, whereas in sample lithe two equivalents of protein were reacted with one equivalent of MBA. The viscosity data for both samples were analysed in terms of the Einstein and Simha—Einstein equations. Hydration volume Vh,number average molecular weight M, and intrinsic viscosity [ri] of sample II is greater than that of sample I, irrespective of temperature. Hydrodynamic results suggest that the shape of the transamidified peptide particle in solution is spherical. The results also suggest that MBA is effective in breaking the hide trimmings protein structure upon transamidification where protein content is comparatively less. Thermodynamic parameters were calculated from Eyring and Gibb’s equations. The results suggest that MBA is more effective in the ordering of the water structure in sample II than that for sample I. Note de contenu : - Preparation of aminol polypeptides
- Hydronamic studies
- Table 1 : Hydrated specific volume Vh, intrinsic viscosity [n] and number average molecular weight Mn for transamidified peptides at various temperatures
- Table 2 : Various thermodynamic activation parameters for sample I at different concentrations of peptide
- Table 3 : Various thermodynamic activation parameters for sample II at different concentrations of peptideEn ligne : https://drive.google.com/file/d/1MkaPtd25QKOyZYAfIRCvd-QjZ_7N1Lsv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40128
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 142-146[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather / Rajesh Kumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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[article]
Titre : Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather Type de document : texte imprimé Auteurs : Rajesh Kumar, Auteur ; G. N. Mathur, Auteur Année de publication : 1987 Article en page(s) : p. 147-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés chimiques
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Essais de résilience
Essais dynamiques
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper deals with the techniques for preparation of a single-component polyurethane coating based on castor oil and its application for finishing of leather. Various physical properties were measured to assess the quality of finished leather after coating it with the polyurethane composition. Optical and scanning electron microscopy studies were undertaken to investigate the compatibility of polyurethane coating with leather. Note de contenu : - Preparation of castor oil-based polyurethane
- Characterisation of polyurethane coating
- Physical properties measurement
- Table 1 : Tensile properties of polyurethane-coated and uncoated leather
- Table 2 : Abrasion resistance of polyurethane-coated and uncoated leather
- Table 3 : Flexing endurance values of polyurethane coated and uncoated leather
- Table 4 : Rub fastness data of polyurethane coated and uncoated leather
- Table 5 : Water penetration, water absorption and water vapour permeability of polyurethane-coated and uncoated leather
- Table 6 : Chemical resistance properties of polyurethane-coated and uncoated leather
- Table 7 : Scuff resistance of polyurethane-coated and uncoated leatherEn ligne : https://drive.google.com/file/d/1HfitjCrZFBKDK5jtF_-J8x9EnNPRWGTf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40129
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 147-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Surface active agent-collagen interaction : Effect on shrinkage temperature / E. M. Caillaba in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : Surface active agent-collagen interaction : Effect on shrinkage temperature Type de document : texte imprimé Auteurs : E. M. Caillaba, Auteur ; N. Sierra, Auteur ; V. D. Vera, Auteur ; I. G. Mogilner, Auteur ; J. R. Grigera, Auteur Année de publication : 1987 Article en page(s) : p. 153-154 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux de bovins
Dynamique moléculaire
Surfactants
Température de retraitIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to gain information on the effect of surface active agents (surfactants) on collagen we have studied the shrinkage temperature (T5) of bovine Achilles tendon and of the corium of bovine hides in the presence of different surfactants at various pH values. A non-ionic, a cationic and an anionic agent were tested as well of polyethylene glycol (PEG). The results show that the lyotropic effect of such agents is strongly dependent on pH. Non-ionic detergent and PEG may be as aggressive as ionic types according to pH. It also appears that ionic detergents have a greater lyotropic effect when both collagen and the ionic surfactant bear the same charge, which suggests that there is no correlation between the affinity of the agent and collagen and the lyotropic effect. En ligne : https://drive.google.com/file/d/1pa-QNwUVZsQ1lzkGuzzsxU7bfpEtOj7v/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40130
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 153-154[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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007135 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |