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675.2 : Préparation du cuir naturel. Tannage |
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Some considerations in chrome tanning footwear leathers / Richard Daniels in WORLD LEATHER, Vol. 6, N° 7 (12/1993 - 01/1994)
[article]
Titre : Some considerations in chrome tanning footwear leathers Type de document : texte imprimé Auteurs : Richard Daniels, Auteur Année de publication : 1993 Article en page(s) : p. 55-57 Langues : Anglais (eng) Catégories : Chaussures
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Although there have been many different approaches to fully or partially replace chromium salis in tanning, approximately 90% of all leathers made throughout the world are from full chrome production. These leathers find uses in many areas, but the major outlet is still for shoe manufacture with die leathers made from bovine hides.
As the process develops in each tannery, many individual factors have to be taken into account. In today's market, in addition to being competitive in terms of price, die process has to provide a base for consistency in the final leathers and needs to be in tune with customer demands, frequently shaped by environmental pressures.
With full consideration being given to these objectives, the prime factor affecting the approach to the chrome tannage is die tanning unit, with the process vessel at die heart of the operations.Note de contenu : - The tanning vessel
- The effect of stress
- Considerations regarding blue splitting
- The chrome tanning processEn ligne : https://drive.google.com/file/d/1eOmTHMjmiPqGY9umHtD4HoK0SPAWP_b6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35184
in WORLD LEATHER > Vol. 6, N° 7 (12/1993 - 01/1994) . - p. 55-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008093 - Périodique Bibliothèque principale Documentaires Disponible Some properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 2 (03-04/1977)
[article]
Titre : Some properties of wet-blue leathers produced from recycled chrome tanning liquors Type de document : texte imprimé Auteurs : John R. Barlow, Auteur ; S. W. Ip, Auteur Année de publication : 1977 Article en page(s) : p. 29-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome -- Recyclage
Couleur
Produits chimiques -- Consommation -- Réduction
Résistance à la déchirure
Résistance à la traction
Tannage au chrome
Température de retrait
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A simple recycling system was used in the preparation of wet-blue leathers, with the residual chrome tanning liquor being replenished with acid and salt before being used for pickling the next batch of bated hide. Chrome tanning powder was added to the liquor on completion of pickling, to give a total offer of the required amount, with the wet blues thus produced being compared to those prepared by a conventional process. Two series of experiments were carried out to give either "low chrome" (1.8 % Cr203, dry weight basis) or "normal chrome" (2.5 % Cr203) wet blues. Within each series, the initial properties and storage behaviour were unaffected by the use of recycled, rather than fresh, chrome tanning liquors. Low chrome and normal chrome samples displayed similar stability under the storage conditions used, with neither set showing deterioration of the measured properties after the prescribed holding time. Colour measurements on the wet-blues before and after storage showed that the leathers from recycled liquors did not undergo changes greater than those of the control samples, and that between-batch colour differences should not be a problem in practical application. Wastage of chrome tanning salt, and hence concentration of chrome in the effluent, was reduced by approximately 90 % by recycling the residual tanning liquor, rather than discarding it as in a normal process. Overall consumption of chrome tanning salt was reduced by 13 (low chrome series) and by 24% (normal chrome series) compared to that of similar, conventional processes. Note de contenu : - INTRODUCTION : 1. Storage behaviour - 2. Initial colour and between-batch colour vriation
- METHODS : Starting material
- TESTING OF WET-BLUES : Shrinkage temperature - Tensile strength and tear strength - Colour
- RESULTS : a) Effects of recycling on initial properties of wet-blues and on chemical consumption during processing - b) Change in properties of wet-blues during storage - c) The effect of recycling on the colour of wet-blues - d) Comparison of low chrome with normal chrome
- Fig. 1 : Processing schedule
- Table 1 : Some chemical and physical properties of wet-blue leathers methods
- Table 2 : Chemical consumption-comparison of standard and recycling
- Table 3 : Percentage changes in the value of some properties of wet-blues after three months' storage
- Table 4 : Colour of leathers from recycled liquors, compared to that of leathers from control process
- Table 5 : Savings in chrome tanning Salts (£/annum) by recycling liquors, assuming 20% reduction in usageEn ligne : https://drive.google.com/file/d/1IQRJ-9WYI38akuFUe8kWH_9V0PgrIyuE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34118
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 2 (03-04/1977) . - p. 29-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007111 - Périodique Bibliothèque principale Documentaires Disponible Some properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
[article]
Titre : Some properties of wet-blue leathers produced from recycled chrome tanning liquors Type de document : texte imprimé Auteurs : John R. Barlow, Auteur ; H. S. W. Ip, Auteur Année de publication : 1978 Article en page(s) : p. 29-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome -- Recyclage
Liqueurs de tannage
Résistance à la déchirure
Résistance à la traction
Température de retrait
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A simple recycling system was used in the preparation of wet-blue leathers, with the residual chrome tanning liquor being replenished with acid and salt before being used for pickling the next batch of bated hide. Chrome tanning powder was added to the liquor on completion of pickling, to give a total offer of the required amount, with the wet blues thus produced being compared to those prepared by a conventional process. Two series of experiments were carried out to give either "low chrome" (1.8 % Cr203, dry weight basis) or "normal chrome" (2.5 % Cr203) wet blues. Within each series, the initial properties and storage behaviour were unaffected by the use of recycled, rather than fresh, chrome tanning liquors. Low chrome and normal chrome samples displayed similar stability under the storage conditions used, with neither set showing deterioration of the measured properties after the prescribed holding time. Colour measurements on the wet-blues before and after storage showed that the leathers from recycled liquors did not undergo changes greater than those of the control samples, and that between-batch colour differences should not be a problem in practical application. Wastage of chrome tanning salt, and hence concentration of chrome in the effluent, was reduced by approximately 90 % by recycling the residual tanning liquor, rather than discarding it as in a normal process. Overall consumption of chrome tanning salt was reduced by 13 % (low chrome series) and by 24 % (normal chrome series) compared to that of similar, conventional processes. Note de contenu : - METHODS : Starting material
- TESTING OF WET-BLUES : Shrinkage temperature - Tensile strength and tear strength - Colour
- RESULTS : Effects of recycling on Initial Properties of wet-blues and on chemical consumption during processing - Change properties of wet-blues during storageEn ligne : https://drive.google.com/file/d/1IQRJ-9WYI38akuFUe8kWH_9V0PgrIyuE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35212
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 29-33[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008597 - Périodique Archives Documentaires Exclu du prêt Some thoughts on standardisation of synthetic tanning materials / Samir Das Gupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 64, N° 1 (01-02/1980)
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Titre : Some thoughts on standardisation of synthetic tanning materials Type de document : texte imprimé Auteurs : Samir Das Gupta, Auteur Année de publication : 1980 Article en page(s) : p. 16-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux
Syntans
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Syntans are in general condensation products of aromatic substances (cresol, phenol, naphthol and naphthalene), formaldehyde and sulphuric acid. There are, however, many variations in the ingredients, the relative quantities used and the technique of production. The chemistry of syntans is extensively discussed and evaluated by Otto, Kuntzel and Gustavson. In general, the bigger the molecules of the tan and the higher the proportion of secondary valencies it possesses relative to sulphonic groups, the fuller the leather it will produce. The secondary valencies are a function of the dipole moments and phenolic OH groups in the molecule and can lead to H-bonds on the protein structure. On the other hand the presence of highly ionised sulphonic groups in the mole-cule can inhibit this effect. By carefully manipulating these two main factors, the final leather-forming character of the syntan is obtained. In fact innumerable opportunities exist for the manufacture of syntan having varying product characteristics.
Resin tanning materials on the other hand are either condensation products of aminoplasts like urea, melamine–formaldehyde, dicyandiamide–formaldehyde, or copolymers of styrene–maleic anhydride or polyamide or polymerisation products of acrylic monomers. Mostly they are used as retanning agents. The point worth considering is whether such a big range, presently manufactured by each manufacturer, is absolutely required by a tanner. An attempt has therefore been made in this paper to analyse the reasons for such a wide range of syntans and to suggest an approach for standardisation of these synthetic tanning materials.Note de contenu : - Why so many syntans ?
- Historical development of syntans
- Classifications and grouping of synthetic tanning materials
- Parameters for specification : Identification - Parameters
- Proposed specifications : Auxiliary syntans - General - Neutral levelling and dispersing syntans - Chrome syntans - Resin tanning materials - Aldehydes and miscellaneous products
- Table 1 : Requirements for auxiliary syntans
- Table 2 : Requirements for replacement syntans
- Table 3 : Requirements for levelling syntans
- Table 4 : Requirements for chrome syntans
- Table 5a : Requirements for resins, type 1
- Table 5b : Requirements for resins, type 2
- table 5c : Requirements for resisn, type 4
- Table 5d : Requirements for resins, type 3En ligne : https://drive.google.com/file/d/18aqlzuS9tJrnABGD_TwYd4BR4zd3Ew6k/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34133
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 64, N° 1 (01-02/1980) . - p. 16-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007125 - Périodique Bibliothèque principale Documentaires Disponible Some thoughts on the possible mechanism of sodium sulphate conditioning for the mimosa cure process / J. H. Atkinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
[article]
Titre : Some thoughts on the possible mechanism of sodium sulphate conditioning for the mimosa cure process Type de document : texte imprimé Auteurs : J. H. Atkinson, Auteur ; F. Scowcroft, Auteur Année de publication : 1976 Article en page(s) : p. 52-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Mimosa et constituants
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage En ligne : https://drive.google.com/file/d/1AIsqmCRJKDyP_rikC6W29qxdLB3d9DA0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31802
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60 (Année 1976) . - p. 52-54[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008596 - Périodique Archives Documentaires Exclu du prêt Some thoughts on the possible mechanism of sodium sulphate conditioning for the mimosa cure process / J. H. Atkinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 2 (03-04/1976)
PermalinkSpeciation of chromium ions in tannery effluents and subsequent determination of Cr (VI) by ICP-AES / M. A. Eid in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 11 (11/2002)
PermalinkStability of a Rhus Coriaria L. tannin extract under different storage conditions / A. Zalacain in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)
PermalinkStable aluminium tannage with a copolymer of n-thioureidomal acid with acrylic acid / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkLa station d'épuration du district de Santa Croce, modèle de circularité / Juliette Sebille in LEATHER FASHION DESIGN (LFD), N° 5 (02/2020)
PermalinkStress analysis of tannery drums / George Kucmas in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
PermalinkStructural and performance characteristics of pigskin leather with different tanning methods / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 3 (05-06/2019)
PermalinkStructural differences between commercial acacia mangium tannin and its effluent / Teng Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)
PermalinkStudies of beamhouse swelling for brine-cured hides given an enzyme soak / Jean J. Tancous in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXXI, N° 11 (11/1996)
PermalinkStudies of the bending behaviour of chrome tanned leather / W. Yu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 4 (07-08/1997)
PermalinkStudies of vegetable tannins. Complete structural determination of two chestnut tannins - vescalagin and castalagin using nuclear magnetic resonance spectroscopic methods / H. R. Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 6 (11-12/1995)
PermalinkStudies on chamois leather - Tanning using plant oil / S. Hari Krishnan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 6 (11-12/2005)
PermalinkStudies on chamois tanning : An investigation using modified fish oil / S. Hari Krishnan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 2 (02/2005)
PermalinkStudies on combination tanning based on henna and oxazolidine / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 10 (10/2009)
PermalinkStudies on further structural stabilisation of the chrome-collagen compound / T. Ramaswamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
PermalinkStudies on further structural stabilisation of the chrome-collagen compound / T. Ramaswamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 5 (09-10/1975)
PermalinkStudies on phosphonium based combination tanning : less chrome approach / N. N. Fathima in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 9 (09/2011)
PermalinkStudies on polyurethane polyadducts as retanning materials / R. Prabhu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)
PermalinkStudies on tanning with zirconium oxychloride : Part I. Standardization of tanning process / A. Sundarrajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
PermalinkStudies on tanning with zirconium oxychloride : Part II. Development of a versatile tanning system / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
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