A case study of the biodeterioration of some boot uppers made from a polyurethane poromeric / R. M. Webster in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXX (Année 1985) . - p. 172-183 Titre : A case study of the biodeterioration of some boot uppers made from a polyurethane poromeric Type de document : texte imprimé Auteurs : R. M. Webster, Auteur Année de publication : 1985 Article en page(s) : p. 172-183 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Reinoculation of a range of microbial isolates showed fungal attack to be the reason for the deterioration of some boots with polyester polyurethane (PU) poromeric uppers. Bacteria were not implicated although they had grown along nylon fibers in the poromeric. Flaking of the top coating of the PU foam layer resulted from surface growth, whereas deep cracking, a slower expression of fungal attack, was caused by growth from underneath the foam layer. Peeling of the surface coating was produced by two Fusarium spp but not by Alternaria alternate. Cracks were colorless to pinkish light grey with the two Fusarium spp and dark greenish grey with A. alternate. Similar discolorations were produced in polyether PU poromeric where fungi grew beneath the PU coating (without further deterioration) to form “blooms”. The results of experiments were mold growth was kept separate from substrate indicated that exoenzymes were responsible for polyester PU deterioration. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9340 [article]

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Early detection of grain faults during wet processing / K. T. W. Alexander in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 191-211 Titre : Early detection of grain faults during wet processing Type de document : texte imprimé Auteurs : K. T. W. Alexander, Auteur ; M. P. Walker, Auteur ; R. M. Webster, Auteur ; A. Bugby, Auteur Année de publication : 1990 Article en page(s) : p. 191-211 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : With the growing demand for high-quality full-grain leathers and the necessity to minimise costs of re-working, the need for accurate and reliable sorting of semi-processed stock is becoming increasingly important. During recent studies at the British Leather Confederation,a wide range of high- and low-technology approaches has been investigated to determine whether they have any potential to detect grain damage. This has led to the development of the 'Sortassist' process based on a decolorisable pigment that effectively highlights grain faults on wet blue(75 to 85 percent detection rate) or pickled stock(over 95 percent detection rate). The pigment formulation can be applied either manually or by drum at pH>4. After grain sorting, the pigment is decolorised and chemically destroyed by a short acid-treatment step at pH<3, prior to further processing of the stock. En ligne : https://drive.google.com/file/d/1jzaDUaI72sXmrEfiuFUFsgKhVYuGxAet/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8660 [article]

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