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Application of bio-itaconic acid acrylic polymer in leather processing / Tungmin Wu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 1 (01-02/2023)
[article]
Titre : Application of bio-itaconic acid acrylic polymer in leather processing Type de document : texte imprimé Auteurs : Tungmin Wu, Auteur ; Suehuai Gau, Auteur ; Peng Jie Liu, Auteur Année de publication : 2023 Article en page(s) : p. 5-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique bio-itaconique
Cuirs et peaux -- Epaisseur
Déchets -- Réduction
Gonflement (physique)
Industrie -- Pollution -- Lutte contre
Matériau plein
Polymères -- Synthèse
Sels de sodiumIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Biomass material is a kind of environmental protection material, which can be applied to reduce pollution in the leather industry. In this research, biomass raw materials (waste rice stalks) were solid fermented by inoculating with appropriate strains to produce itaconic acid products. The itaconic acid products and traditional leather chemicals were used respectively in leather processing. Two types of leather were tested, namely upper leather and split leather. The fullness and thickness of the finished leathers, also the COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand) and SS (suspended solids) of the residual liquids were tested and compared. The results show that the itaconic acid products could improve the fullness of the finished leather and more importantly could reduce the pollutants of the residual liquids thus enhancing environmental benefits. Note de contenu : - SYNTHESIS OF ITACONIC ACRYLIC ACID POLYMER PRODUCTS : Synthesis of traditional leather chemical acrylic acid products (AA) - Synthesis of bio-itaconic acrylic acid polymer
- APPLICATION AND TESTING : Experiment materials and equipment - Influence of different ratios of bio-itaconic acrylic acid polymer/traditional polyacrylic acid sodium salt on the fullness and thickness of leather - Influence of reaction time on the leather fullness - Influence of different pH values on the leather fulness - Analysis of the redisual liquide
- RESULTS AND DISCUSSIION : Influence of different ratios of bio-itaconic acrylic acid polymer/traditional polyacrylic acid sodium salt on the fullness and thickness of leather - Influence of reaction time on the leather fullness - Influence of different pH values on the leather fullness - Analysis of the residual liquors
- Table 1 : Ratio of bio-itaconic acid polymer/traditional polyacrylic acid sodium salt for different groups of drumsEn ligne : https://drive.google.com/file/d/1Iu_V5SDTwq-KKKmdiXT74NwJRUzeKO4G/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38870
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 1 (01-02/2023) . - p. 5-10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23893 - Périodique Bibliothèque principale Documentaires Disponible Auxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 3 / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
[article]
Titre : Auxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 3 Type de document : texte imprimé Auteurs : Agusti Marsal, Auteur ; Ramón Palop, Auteur ; V. Frias, Auteur ; Joaquim Font, Auteur ; J. Cot, Auteur ; Albert M. Manich, Auteur Année de publication : 2004 Article en page(s) : p. 191-196 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents anti-gonflement
Bains de trempe -- Analyse
Cuirs et peaux -- Epaisseur
Eaux usées -- Analyse
Epaisseur -- Mesure
Naphtalène sulfonique, AcideL'acide naphtalènesulfonique est un composé aromatique de formule brute C10H8O3S, constitué d'un noyau naphtyle substitué par un groupe sulfo. Comme tous les dérivés monosubstitués du naphtalène, il existe sous la forme de deux isomères, selon que le substituant soit en position 1 ("α", ou péri) ou 2 ("β" ou amphi).
Synthèse : Au plan commercial, l'acide naphtalènesulfonique est produit par sulfonation du naphtalène, effectuée par la méthode classique à base d'acide sulfurique. Les réacteurs modernes sont revêtus de verre ; les équipements plus anciens étaient en fonte ou recouverts d'émail.
En général, la sulfonation du naphtalène conduit à un mélange de produits. La sulfonation du naphtalène à moins de ~100 °C est sous contrôle cinématique et produit principalement de l'acide 1-naphtalènesulfonique. La sulfonation du naphtalène à plus de ~150 °C permet un contrôle thermodynamique de la réaction et l'acide 2-naphtalènesulfonique est alors le produit principal.
Dérivés : On appelle "acides naphtalènesulfoniques" les dérivés substitués de l'acide naphtalènesulfonique. Ce sont d'importants précurseur et intermédiaires chimiques, notamment dans la production de colorants, d'agents mouillants, de dispersants, de naphtols et d'entraîneurs d'air pour béton et ciment1. La production de nombreux intermédiaires pour former des colorants azoïques ou de triphénylméthane implique la sulfonation du naphtalène suivie d'une autre opération, par exemple la nitration, la réduction ou l'amination.
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Tannage au chrome
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the last ten years, the use of various types of aromatic sulphonic acids in the pickling process to prevent swelling has been suggested by many authors. In previous papers, we studied the capacity of four commercial products to prevent acid swelling of hides during pickling: polyacrylic acid, naphthol 3-6-disulphonic acid, p-hydroxydiphenyl sulphonic acid and a blend of naphthalene and naphthol sulphonic acids.
It was found that the best results were obtained using the blend of naphthalene and naphthol sulphonic acids. This process yielded leathers that could be acceptable as far as physical properties and handle are concerned. However ; this process, which also reduced the chloride content and conductivity of the residual bath when compared with a standard pickling process, presented some disadvantages such as an irregular stratigraphic distribution of chromium and a marked difference of colour between the dyed grain and flesh layers after shaving, when using a conventional chromium tanning salt. This was due to the thickness of the hides (3.0 mm) which caused problems of penetration of the chemicals. In order to solve these disadvantages, the joint use of a mixture of a blend of naphthalene and naphthol sulphonic acids with a chromium salt of low basicity and high masking capacity was recommended.Note de contenu : - INTRODUCTION : Aim of the work
- EXPERIMENTAL PROCEDURE : Starting material - Non-swelling Products - Sodium chloride offer
- RESULTS : Thickness after pickling - Thickness and shrinkage temperature after tannage - Analyses of the residual baths of pickling and tanning processes
- Table 1 : Treatments with the studied products
- Table 2 : Thickness variation (%) after pickling as a function of both salinity and type and offer of the auxiliary agents
- Table 3 : Thickness variation (%) after tanning as a function of both salinity and type and offer of the auxiliary agents
- Table 4 : Shrinkage temperature (°C) as a function of both salinity and type and offer of the auxiliary agents
- Table 5 : Conductivity of the pickling bath (μS/cm) as a function of both salinity and type and offer of the auxiliary agents
- Table 6 : Conductivity of the tanning bath (μS/cm) as a function of both salinity and type and offer of the auxiliary agents
- Table 7 : Chemical Oxygen Demand (COD) of the pickling bath as a function of both salinity and type and offer of the auxiliary agentsEn ligne : https://drive.google.com/file/d/1-1SfLAzYNbmtFc5VZ6JlvEw9olv6rDCd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39623
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 5 (09-10/2004) . - p. 191-196[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Establishment and prediction of correlation model between moisture permeability, thickness and temperature of cattle and sheep leather / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 3 (05-06/2022)
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Titre : Establishment and prediction of correlation model between moisture permeability, thickness and temperature of cattle and sheep leather Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Fang Songchun, Auteur ; Wang Jie, Auteur ; Zhao Jinlong, Auteur Année de publication : 2022 Article en page(s) : p. 117-119 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux -- Effets de la température
Cuirs et peaux -- Epaisseur
Cuirs et peaux de bovins
Cuirs et peaux de moutons
Modèles mathématiques
PerméabilitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper mainly studied the relationship between moisture permeability, thickness and temperature of cattle and sheep leather. The arrangement of protein fibres was obtained by scanning electron microscope and the effect of temperature on the moisture permeability of cattle and sheep leather was analysed from the microscopic point of view. The fitting equation of the relationship between moisture permeability of cow and sheep leather and thickness and temperature at one atmospheric pressure was obtained.
Cow leather equation: Yl = —0.07556x2 .2099xT + 0.03592T2 + 0.4021x — 2.579T + 60.04
Sheep leather equation: = —0.05995x2-0.1565xT + 0.0316672 + 3.475x — 2.254T + 47.34
The automatic generation curve of temperature, thickness and moisture permeability was established by MATLAB, and the moisture permeability of sheepskin and cowhide under the condition of unknown temperature and thickness can be predicted.Note de contenu : - EXPERIMENTAL PROCEDURES : Experimental instruments - Experimentals materials
- RESULTS AND DISCUSSION : Microscopic analysis of the effect of temperature on the moisture permeability of leather - Establishment of mathematical model - Automatic generation of associative curvesEn ligne : https://drive.google.com/file/d/1bcx4UjoB8izN0cq7iU3fgavruWRzR4XH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37755
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 3 (05-06/2022) . - p. 117-119[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23467 - Périodique Bibliothèque principale Documentaires Disponible Influence of animal factors and processing treatments on grain layer and total thickness of cattlehides / A. L. Everett in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)
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Titre : Influence of animal factors and processing treatments on grain layer and total thickness of cattlehides Type de document : texte imprimé Auteurs : A. L. Everett, Auteur ; Mary V. Hannigan, Auteur Année de publication : 1978 Article en page(s) : p. 207-221 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Epaisseur
Cuirs et peaux de bovins
Peau -- Histologie
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Differences in physical structure between the grain (papillary) and corium (reticular) layers of cattlehides, and especially their final thickness ratio, have important effects on the physical properties of leather. Tanners need more data on the extent of variability of grain layer thickness in rawstock from different sources. The effects of cattle breed, sex, and age on 221 fresh hide biopsy samples from known sources and the effect of body location in seven identified hides were evaluated. While total thickness varied considerably with all factors, depth of grain layer increased very gradually with age and was essentially constant (1.5 to 2.0 mm) after one year. Breed and sex were also minor factors. Extensive data later found in the literature (summarized here) confirm and supplement our results and show that the grain is slightly deeper in colder climates and seasons.
Information was also obtained on the changes in depth of grain layer induced by upper leather processing. Measurements from 168 wet-blue sides and 148 crust sides from 13 different commercial suppliers indicate that grain depth decreases from about 1.7 mm in rawstock to about 1.0 mm at the blue stage, and then to about 0.7 mm in dry leather. Certain retannages and finishing procedures may further modify this value. Correlations between grain and total thickness were relatively weak in rawstock, but stronger and more useful in unsplit blue stock.Note de contenu : - EXPERIMENTAL : Rawstock samples - Wet-blue samples - Crust leather samples - Histology - Measurements
- RESULTS AND DISCUSSION : Rawstock measurements - Variation with body location - Wet-blue measurements - Crust measurements - Succession of changes - Correlation of grain and total thickness
- Table 1 : Variation in fresh hide thickness with breed and age
- Table 2 : Variation in fresh hide thickness with sex
- Table 3 : Variation in salted hide thickness (mm) with body location
- Table 4 : Variation in commercially processed side thickness with type of process
- Table 5 : Regression of grain thickness on total thickness
- Appendix table A : Survey of adult european cattle depth of grain
- Appendix table B : Survey of asian, african, and south american cattle depth of grainEn ligne : https://drive.google.com/file/d/1Ayqe_KSY6m-NyYX7ZEtZbERE42iFnXZp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41151
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 207-221[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011628 - Périodique Bibliothèque principale Documentaires Exclu du prêt Influence of dietary protein content on physical properties of blue-fox skins / M. Mäntysalo in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
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Titre : Influence of dietary protein content on physical properties of blue-fox skins Type de document : texte imprimé Auteurs : M. Mäntysalo, Auteur ; T. Dahlman, Auteur Année de publication : 2002 Article en page(s) : p. 122-127 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aliments
Analyse de varianceEn statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Cuirs et peaux -- Epaisseur
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de renard bleu
ProtéinesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effect of decreasing the amount of protein in blue-fox feed on the physical characteristics of skin was studied with three dietary protein levels of 15 %, 22.5 % and 30 % of metabolizable energy due to protein. The effect of methionine as a supplement was also studied. The skins were first aluminium tanned and then the physical properties, the thickness, breaking load, tensile strength and elongation at break were measured and analysed.
Analyses showed that the decrease in the amount of protein in feed has a detectable influence on physical properties, the thickness, breaking load and tensile strength have a tendency to decrease. The elongation at break was clearly dependent on the sample cutting angle.Note de contenu :
- Materials and methods
- Sampling
- Physical characteristics
- Discussion
- Physical characteristics of leather of pelts : Sample Thickness - Breaking load - Tensile strength - Elongation at break
- Table 1 : Group means of sample thickness with standard deviations.
Thickness does not depend on cutting angle
- Table 2 : Group means of breaking load of samples with standard deviations
- Table 3 : Group means of tensile strength of samples with standard deviations
- Table 4 : Group means of elongation at break of samples with standard deviations
- Table 5 : Summation of main results from one-way ANOVA analyses
- Table 6 : p-values computed using two-way analysis of varianceEn ligne : https://drive.google.com/file/d/1h3khB4HVNT308bP_KuqQs-9HMC-jm0sn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39927
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 122-127[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire PermalinkA novel study on using pufferfish skin as sustainable leather : characterisation, thermal behaviour and sound absorption properties / Muhammet Uzun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 4 (07-08/2022)
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