Antifungal leather treatment with biological extracts / Kathrin Leppchen in LEATHER INTERNATIONAL, Vol. 213, N° 4816 (11-12/2011)  

[article]  inLEATHER INTERNATIONAL > Vol. 213, N° 4816 (11-12/2011) . - p. 36-38 Titre : Antifungal leather treatment with biological extracts Type de document : texte imprimé Auteurs : Kathrin Leppchen, Auteur ; Martin Völker, Auteur ; Michael Meyer, Auteur Année de publication : 2011 Article en page(s) : p. 36-38 Langues : Anglais (eng) Catégories : Biofongicides Cuirs et peaux -- Conservation Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather as a natural product containing grease, dyes and tanning agents is an ideal nutrient source for moulds. The risk of mould growth is given in nearly all process stages ofleather production as well as the subsequent processing and use. Their enzymes digest proteins, fats and carbohydrates of the leather structure. Optimum conditions moulds germinate, grow and may eventually destroy the leather. Due to the global division of labour in the leather industry and the resulting transportation of raw hides, intermediates, leather and leather goods over long distances, it is necessary to protect the package and material against a growth of moulds. Currently, adequate protection of leather is ensured solely by using toxic and ecologically critical preservatives such as benzothiazoles or phenol derivatives. This paper introduces an antifungal treatment for leather and its intermediates on the basis of biological and environmentally friendly agents. When searching for appropriate agents that are known to feature antifungal properties, especially carboxylic acids with 8 to 11 carbon atoms including caprylic acid (C8), pelargonic acid (C9) and undecylenic acid (C11) were noted as effective. The carboxylic acids destroy cell walls, denature proteins of fungi, impact fatty acid synthesis and pigmentogenesis, thus preventing the growth of moulds, eg by suppressing their respiration. Carboxylic acids are classified as environmentally friendly, physiologically safe and non-toxic. As a bulk-product from fat lipolyse they are easy to synthesis and readily available. The antifungal treatment should be effective during transportation of packaged goods and prevent the germination of existing mould spores on leather materials regardless of surrounding microclimate. Note de contenu : - Determination of the antifungal efficacy of the fatty acids and their salts - Treatment of leather and its intermediates - Antifungal activity of fatty acids and their salts and treatment of intermediates - Variation in concentration - Variation in exposure time - Variation of spore concentration - Antifungal spectrum - Exposure to different physical conditions - Impact on material properties - Antifungal efficacy of the fatty acid salt with aldehyde tanned leather En ligne : https://drive.google.com/file/d/1ne1-pgKrp--5COfKzfWERDZ5VC0RUB19/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12756 [article]

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