Influence of various waterproofing agents on water and water vapour absorption and permeability / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 4 (07-08/2003) . - p. 144-148 Titre : Influence of various waterproofing agents on water and water vapour absorption and permeability Type de document : texte imprimé Auteurs : Z. Bajza, Auteur ; P. Hitrec, Auteur ; M. Muzic, Auteur Année de publication : 2003 Article en page(s) : p. 144-148 Note générale : Bibliogr. Langues : Anglais (eng) 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 de bovins Essais (technologie) Humidité -- Absorption Imperméabilisants Imperméabilisation Perméabilité Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this article, the influence on finished leather properties of five different waterproofing agents has been examined. Wet-salted bovine hide (weight category 35 kg) was treated in an half-industrial environment by conventionally used liming, tanning and retanning processes. 9% offers of five different waterproofing agents were used for the waterproofing process. The levels of water vapour, fats, ash and Cr2O3 were determined for the crust leather. The water vapour permeability, leather porosity to water vapour and absorption of water (measured on both the Kubelka apparatus and the Bally penetrometer) were determined. The water repellency properties of each waterproofing agent were estimated from the results. En ligne : https://drive.google.com/file/d/1uB8WAlL7pxLmIPnHSo5luEG48YxHyahc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39770 [article]

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Theoretical and practical aspects of polar interactions between hide colllagen and aqueous media in curing and tanning / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 12 (12/1970)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 54, N° 12 (12/1970) . - p. 417-430 Titre : Theoretical and practical aspects of polar interactions between hide colllagen and aqueous media in curing and tanning Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur ; Desmond R. Cooper, Auteur Année de publication : 1970 Article en page(s) : p. 417-430 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène Cuir -- Séchage Dynamique moléculaire Imperméabilisants Solutions aqueuses (chimie) Tannage Tannage végétal Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Recent fundamental studies in these laboratories have been concerned with the range of relatively weak, reversible interactions, generally ternied “polar” interactions, which occur between hide collagen and its aqueous environment. These studies have provided further insight into the factors governing this reactivity. The interaction has wide significance in determining solubilities and properties of solutions, the solution structure of proteins as well as the interaction of hide collagen with technological materials such as vegetable tannins, dyestuffs and water-proofing agents. Hence, greater understanding of the basic processes involved is a prerequisite for rationalisation and improvement in the technological operations of curing and tanning. In this review, the mechanism of polar interaction indicated in fundamental studies is outlined and some areas of practical application discussed, including the use of polar additives as penetration assistants in vegetable tannage and the application of polar molecules carrying longchain hydrocarbon structures in waterproofing treatments for leather. Note de contenu : - Basic Studies : Nature of non-covalent interactions in solution - Factors in collagen stabilisation - Factors in solvent lyotropic activity - Practical significance of polar interactions - Polar interactions in penetration-assisted vegetable tannage : Polar binding of waterproofing agents - Table 1 : Relative lyotropic activities of a range of polar compounds En ligne : https://drive.google.com/file/d/1Ny4AwQvsWlqWxgYedqC_-LTtSBxObfXv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40709 [article]

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