Acrylic syntans - versatile tanning materials / William C. Prentiss in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975) . - p. 481-497 Titre : Acrylic syntans - versatile tanning materials Type de document : texte imprimé Auteurs : William C. Prentiss, Auteur ; Charles R. Sigafoos, Auteur Année de publication : 1975 Article en page(s) : p. 481-497 Note générale : Appendix - Bibliogr. Langues : Américain (ame) Catégories : Chaussures Cuirs et peaux de porcs pH Polyacryliques Prétannage Quebracho Le quebracho est un arbre à écorce ligneuse, mesurant 30 mètres de haut, à feuilles tannées et à fleurs tubulées blanches. Quebracho est l'un des noms communs, en espagnol, d'au moins trois espèces similaires d'arbres originaires du Gran Chaco, en Amérique latine : Schinopsis lorentzii (quebracho colorado santiagueño), de la famille des Anacardiaceae ; Schinopsis balansae (quebracho colorado chaqueño), de la même famille ; Aspidosperma quebracho-blanco (quebracho blanc), de la famille des Apocynaceae. Ces trois espèces sont riches en tanin et fournissent un bois très dur, particulièrement résistant. Leur nom provient de l'espagnol quiebrahacha, qui signifie brise-hache. Retannage Syntans Tannage au chrome Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Tannage synthétique Tannage végétal Tige de la chaussure Vêtements Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Acrylic resins have been utilized for decades in the finishing of leather, and literature references are available for their use in finishing and in retanning processes. There is little in the current literature, however, on acrylic syntans for use in tanning or retanning, although such products have been available commercially since the early 1960's. In 1966, a Netherlands patent and, in 1969, a United States patent were issued covering the basic composition and use of an acrylic polymer prepared in the presence of a sulfated oll for use in the preparation of leather. A paper read at the Northampton group of the SLTC covered the known properties of one of these novel retanning materials. More recently, a patent was issued to cover copolymers of unsaturated acids and quaternized tertiary amines, although products of this type are not normally available. Note de contenu : - USE OF ACRYLIC SYNTAN WITH CHROME TANNING : As a chrome exhaust aid - As a pretannage - USE OF ACRYLIC SYNTAN IN RETANNING OF CHROME LEATHER : Review of precious work - Effect of pH to control deposition - Buffered retannages - Combination retannages with vegetable extract - CURRENT RETANNAGES FOR VARIOUS LEATHERS - Table 1 : Acrylic syntan - typical values - Table 2 : Syntan influence on chrome exhaustion - Table 3 : Acrylic syntan compared as pretan or retan - Table 4 : Acrylic syntan pretan in salt-free pickle chrome content of leathers - Table 5 : Effect of pH of retannage on leather properties - Table 6-A : Effect of buffers on leather properties - Table 6-B : Effect of buffers on leather properties - Table 7 : Acrylic syntan in combination with vegetable - Table 8 : Buffered acrylic plus quebracho retannage - Table 9 : Buffered retannage for white, full grain side leather - Table 10 : Soft pigskin for garment leather - Table 11 : Retannage for white pigskin - Table 12 : Retannage for shoe side upper leather - Table 13 : Retannage for softy shoe or boot En ligne : https://drive.google.com/file/d/1tJOg67zIbIoqEV2WZUuL8IAHhtGEvESE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38793 [article]

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A comparative study of uniaxial and biaxial breaking stress and strain profiles of goat upper / M. D. Naresh in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 2 (03-04/2001)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 2 (03-04/2001) . - p. 72-79 Titre : A comparative study of uniaxial and biaxial breaking stress and strain profiles of goat upper Type de document : texte imprimé Auteurs : M. D. Naresh, Auteur ; T. Rangaswamy, Auteur ; V. Arumugam, Auteur ; R. Sanjeevi, Auteur Année de publication : 2001 Article en page(s) : p. 72-79 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contraintes (mécanique) Cuirs et peaux de chèvres Essais de résilience Essais dynamiques Rupture (mécanique) Tige de la chaussure Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conventional uniaxial tensile test methods may only inadequately provide realistic information about the mechanical behaviour of leather under actual user conditions. A preliminary study to map the breaking stress and breaking strain profiles of goat upper using a biaxial testing procedure is described here. The results indicate that whilst the influence of the fibre matrix is retained, uniaxial tests generally tend to give higher results, a factor which needs careful consideration during design and development of end products. Note de contenu : - Experimental design - Uniaxial strength profile - Biaxial strength profile - Comparison with uniaxial test results - Influence of lateral load on dynamic axis prior to extension En ligne : https://drive.google.com/file/d/1mbYkNfI4ZQZd53ToQSmFu0KlkwnZ5veO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40414 [article]

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IKW quality assessment recommendation : compatibility of shoe uppers with care products (2015) / German Cosmetic, Toiletry, Perfumery and Detergent Association (IKW) (Mainzer Landstrasse 55, Frankfurt am Main, Germany) in SOFW JOURNAL, Vol. 142, N° 3 (03/2016)  

[article]  inSOFW JOURNAL > Vol. 142, N° 3 (03/2016) . - p. 56-57 Titre : IKW quality assessment recommendation : compatibility of shoe uppers with care products (2015) Type de document : texte imprimé Auteurs : German Cosmetic, Toiletry, Perfumery and Detergent Association (IKW) (Mainzer Landstrasse 55, Frankfurt am Main, Germany), Auteur Année de publication : 2016 Article en page(s) : p. 56-57 Langues : Anglais (eng) Catégories : Compatibilité chimique et physique Cuirs et peaux -- Finition Produits de nourriture du cuir Qualité -- Contrôle Tige de la chaussure Index. décimale : 668.5 Parfums et cosmétiques Résumé : Finishing agents based on aqueous formulations are increasingly used in leather and shoe production, often with a view to creating optical effects. This means that the colours of shoe uppers and finishing agents are intentionally quite different from each other. Darker finishing agents are frequently applied to naturally light leathers. Such finishing agents are not usually smear and water resistant. For environmental reasons, many modern shoe creams are based mainly on solvent-free, water-based formulations. As a result, customer complaints regarding the use of aqueous emulsion creams in shoe care are increasing. Finishing agents can often be wiped off shoes with just a wet cloth. The use of dark finishing agents on light leathers causes light spots and does irreparable damage to shoes. In modern commercial grade care sprays, such as waterproofing sprays, solvents are either alcohol or minerai spirits. However, not ail shoe uppers are compatible with these substances. In many cases, uppers are degraded or become swollen, which may cause irreparable damage to the shoes. This IKW recommendation is intended to provide the shoe trade with an instrument for the quality assessment of the compatibility of shoe uppers with care products. The recommendation can also be used in other fields, such as for leathers intended for furniture and bags. Note de contenu : 1. CARE PRODUCTS - Rub fastness : Method - Test specimen - Assessment - Explanation 2. COMPATIBILITY WITH SOLVENTS : Method (run-off test) - Assessment - Explanation - ANNEX : IKW standard care product N° 1, 2 and 3 En ligne : https://drive.google.com/file/d/1RqAJewR_04egIyOKG5hEHMIbif04rd-7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26675 [article]

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Preservation of hides with sulfite. II. A matched side comparison of leathers from hides preserved with sodium sulfite or brine curing / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975) . - p. 372-379 Titre : Preservation of hides with sulfite. II. A matched side comparison of leathers from hides preserved with sodium sulfite or brine curing Type de document : texte imprimé Auteurs : David G. Bailey, Auteur ; William J. Hopkins, Auteur Année de publication : 1975 Article en page(s) : p. 372-379 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bactéries -- Comptage Bain de saumure 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. Cuir d'ameublement Cuirs et peaux -- Conservation Cuirs et peaux de bovins Essais dynamiques sulfite de sodium Tige de la chaussure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A matched side experiment was carried out to corroborate small scale studies on the effectiveness of an acidified sulfite solution" as a short-term preservation system for fresh hides. One side of each hide was conventionally sait cured and the other was treated with a 20 percent float containing 1.5 percent sodium sulfite and one percent acetic acid (on hide weight). Using six matched sides for each storage period, the sides were held six, 14, and 28 days at ambient temperatures. The leathers prepared from the preserved hides were tested for tensile strength, suitabilitv for lasting, and shrinkage temperature. The preservation was also monitored hy using microbial counts and noting the odor of the bides. The leathers made from sides held for all three storage periods were considered commercially acceptable. The results demonstrated that acidified sulfite provides an alternative to salt curing for the short-term preservation of hides. The new method reduces the dissolved solids in tannery effluents, an identified pollution problern caused hy the use of salt cured hides. In addition, the reduction of the microbial load in the preserved bides provides more sanitary conditions for hide handling. Note de contenu : - Table 1 : Microbial counts on preserved cowsides - Table 2 : Physical test data on garment light shoe upper leather (from sides preserved for 6 days) - Table 3 : Physical test data on upholstery leather in the crust (from sides preserved for 14 days) - Table 4 : Physical test data on finished garment light shoe upper leather (from sides preserved for 28 days) - Table 5 : Shrink temperatures of crust leathers (°C) En ligne : https://drive.google.com/file/d/181glFLUG0sckHdP3A7ygugRLm-fMB1k9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38790 [article]

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Root cause analysis of color migration in footwear : A case study / Sujata Mandal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 4 (04/2023) . - p. 150-155 Titre : Root cause analysis of color migration in footwear : A case study Type de document : texte imprimé Auteurs : Sujata Mandal, Auteur ; Ravi Banothu, Auteur ; R. Mohan, Auteur ; Kalarical Janardhanan Sreeram, Auteur Année de publication : 2023 Article en page(s) : p. 150-155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs en phase solvant Caractérisation Chaussures Cuir teint Décoloration Défauts Essais (technologie) Frottements (mécanique) Produits chimiques -- Migration Solidité de la couleur Tige de la chaussure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The phenomena of migration and/or bleeding of colorants are one of the major concerns for the footwear and leather goods industries. The migration/bleeding of the colorants from one component to the other has been observed in many cases that spoil the aesthetics of the product, which in turn leads to economic loss for the industries. In this research article, a typical case of color migration in leather footwear has been studied in depth for root-cause analysis of the migration problem. The leather used in the shoe upper (affected due to migration), the lining fabric, and the adhesive used in making the footwear were characterized by microscopic and spectroscopic techniques. The FTIR-ATR study revealed that the leather was finished with polyurethane-based coating, the lining fabric used was an aromatic polyester and the adhesive was natural rubber-based adhesive. Though the lining fabric was colorfast to rubbing, it released color in all the organic solvents generally used in natural rubber-based adhesive. Migration studies showed that migration of the colorant (black) from the lining material to the leather (white) happened only in the presence of the adhesive. In conclusion, the organic solvent present in the adhesive used in making the footwear was responsible for the color migration from the lining material to the attached leather. Finally, recommendations have also been made to avoid such problems of color migration in products made from a variety of multiple fabrics. Note de contenu : - EXPERIMENTAL : Materials - Characterization techniques - RESULTS AND DISCUSSION : Microscopic and FTIR-ATR study - Color fastness to rubbing of the lining fabric - Color migration/bleeding tests of the lining fabric - Table 1 : Values of grey cale rating for the lining and the standard cotton lawn DOI : https://doi.org/10.34314/jalca.v118i4.7205 En ligne : https://drive.google.com/file/d/1GNsWjuOMrNz-6bJkjGVZddPuLqDdKG9f/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39183 [article]

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Some recent problems associated with the use of leather in footwear uppers / David Popplewell in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)  

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Study of the biodegradability of leather tanned with sodium aluminosilicate / Salvador Esquerra-Resa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 6 (06/2022)  

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The lasting behaviour of shoe upper leather / J. A. J. Luijten in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)  

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Thermophysical and functional-consumer qualities of shoe upper leather / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)  

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