Influence of sweat-soaking on the thermal stability of retanned and fatliquored cattlehide collagen fibers / Pengxiang Jia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 7 (07/2007)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 7 (07/2007) . - p. 227-233 Titre : Influence of sweat-soaking on the thermal stability of retanned and fatliquored cattlehide collagen fibers Type de document : texte imprimé Auteurs : Pengxiang Jia, Auteur ; Keyong Tang, Auteur ; Jinglong Liu, Auteur ; Xuejing Zheng, Auteur Année de publication : 2007 Article en page(s) : p. 227-233 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanned cattlehide collagen fibers were retanned and fatliquored by different chemicals. The samples were immersed in artificial sweat for 3 to 15 days. The sweat-soaked collagen fibers were then heated in air. The shrinkage temperature (Ts) and shrinkage ratio were recorded to characterize the thermal stability of the collagen fiber samples. It was found that the shrinkage ratio decreased after the processes of retanning and fatliquoring. After sweat-soaking treatment, the shrinkage temperature of the retanned and fatliquored collagen fibers was decreased and shrinkage ratio was increased, indicating an impaired thermal stability. The Ts decreased with the increase of the sweat soaking time. The chrome retanning liquor and GTA retanned collagen fibers exhibit slow decrease of shrinkage temperature with the increase of sweat-soaking time, showing great resistance to sweat. Compared with that fatliquored by other fatliquoring agents studied, collagen fibers fatliquored by neats- foot oil has better sweat-resistant property. En ligne : https://drive.google.com/file/d/1XJKs4BWu6JiNfPotO7hXC_f4TOjfmrRg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3350 [article]

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Thermal shrinkage effects on the mechanical behavior of leathers / Keyong Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 3 (03/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 3 (03/2010) . - p. 94-99 Titre : Thermal shrinkage effects on the mechanical behavior of leathers Type de document : texte imprimé Auteurs : Keyong Tang, Auteur ; Dominick J. Casadonte, Auteur ; Xuejing Zheng, Auteur ; Pengxiang Jia, Auteur ; Dennis C. Shelly, Auteur Année de publication : 2010 Article en page(s) : p. 94-99 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Thermal shrinkage will take place when leathers are heated to a high temperature, usually resulting in a decrease in its value and utility. In this paper, changes in mechanical behavior by thermal shrinkage of leathers are studied systematically for the first time, and the influencing mechanism of thermal shrinkage on the mechanical behaviors of leathers are investigated and analyzed. The results indicate that, by thermal shrinkage, the aperture ratios of leathers are decreased and such mechanical properties of leathers as elastic modulus, tensile strength, and elongation at break are increased. The improvement in mechanical behaviors by hydrothermal shrinkage is at the cost of loss of utility and economic value of leathers. The results indicate that shrunken leather may have a host of new applications because of their excellent mechanical behavior. En ligne : https://drive.google.com/file/d/1sjBf-VkgfBN_tLGI1ODfnNk76RaLpUfg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8734 [article]

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