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Fungicides in military leather : an additional option for tanners producing specification leathers / Dean Didato in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 7 (09/1999)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 7 (09/1999) . - p. 245-258 Titre : Fungicides in military leather : an additional option for tanners producing specification leathers Type de document : texte imprimé Auteurs : Dean Didato, Auteur ; Stephen S. Yanek, Auteur Année de publication : 1999 Article en page(s) : p. 245-258 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : For several decades, paranitrophenol (PNP) has been specified for use in the manufacture of U.S. military leather items. However, PNP lacks the essential U.S. Environmental Protection Agency registration for such use. Supplies of PNP are tightly controlled by the manufacturer, and are only released upon receipt of a Department of Defense (DOD) contract number. The inherent problem for the tanner lies in the trace PNP that appears in the process effluent and in solid wastes (shavings and trimmings). Environmental, regulatory compliance, and worker health issues have compelled the industry to seek replacements for paranitrophenol. Several alternative fungicides are included in military specification MIL-PRF-3122H as well as the forthcoming MIL-PRF-3122I. However, performance data relative to the use of these alternatives has not been published, nor is it readily available. The authors of this paper will share the results of recent testing to determine the feasibility of an U.S.E.P.A.-registered formulation of 2-(thiocyanomethyl-thio)benzothiazole (TCMTB) in military specification shoe upper leather as a PNP replacement. These studies were undertaken with the guidance of the U.S. Army Natick Research, Development, and Engineering Center (NRDEC). Testing began with Federal Test Method Standard No. 191A, Method 5762, entitled “Mildew Resistance of Textile Materials - Soil Burial Method”, and was followed by the standard test method for the Slit Tear Resistance of Leather (ASTM D2212) as well as environmental chamber testing. Note de contenu : - EXPERIMENTAL : SGS U.S. testing : soil burial & strenght properties - Environmental chamber testing/fungal resistance En ligne : https://drive.google.com/file/d/1LsSYUSNfVVejh2wo7G7_fVPxMe1kvA1F/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4449 [article]

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Gamma radiation preservation of cattle hides. A new twist on an old story / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 7 (09/1999)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 7 (09/1999) . - p. 259-267 Titre : Gamma radiation preservation of cattle hides. A new twist on an old story Type de document : texte imprimé Auteurs : David G. Bailey, Auteur Année de publication : 1999 Article en page(s) : p. 259-267 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Laboratory scale and pilot plant scale experiments demonstrating the preservation of cattle hides with gamma radiation from radio-active isotopes were conducted. Hide preservation, using this irradiation source, is achieved by the same biological mechanism as the electron beam irradiation preservation method demonstrated in previous work in this laboratory. Commercial sterilization of many non-food products is already commonplace in the U.S. and recent FDA rulings now permit both types of irradiation treatment to be used to some extent for food preservation. Preservation of cattle hides with gamma radiation begins with the application of bactericide as reported in the electron beam preservation work. However, after this point, several hides can be irradiated simultaneously rather than individually as in the case of electron beam irradiation preservation. The potential advantages of gamma irradiation treatment are discussed and this preservation method contrasted with electron beam irradiation. Note de contenu : - INTRODUCTION : The min-max phenomena - MATERIALS AND METHODS : Preparation of cattle hide samples - Treatment with bactericide - Gamma irradiation of samples - Microbiological assay of samples - Preparation of leather from preserved samples - Physical testing of leather - RESULTS AND DISCUSSION : Determination of min-max window for irradiation - Physical strenght of leather vs. irradiation level - Pilot scale test-cattle sides - Industrial trials En ligne : https://drive.google.com/file/d/1kt56vybVhFEyy7QrPhWWmlOC2G9T36JJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4450 [article]

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Treatment of sheepskin chrome shavings. Isolation of high value protein products and reuse of chromium in the tanning process / Luisa F. Cabeza in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 7 (09/1999)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 7 (09/1999) . - p. 268-287 Titre : Treatment of sheepskin chrome shavings. Isolation of high value protein products and reuse of chromium in the tanning process Type de document : texte imprimé Auteurs : Luisa F. Cabeza, Auteur ; Albert M. Manich, Auteur ; Jaime Cot, Auteur ; Pedro J. Celma, Auteur ; Esther Grau, Auteur ; Robert Carrio, Auteur ; William N. Marmer, Auteur ; Eleanor M. Brown, Auteur ; Maryann M. Taylor, Auteur Année de publication : 1999 Article en page(s) : p. 268-287 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : During the last few years we have demonstrated that cattle hide chrome shavings, a waste coming from the leather industry, can be treated to isolate protein products and chrome sulfate. In Spain and in many other countries, the production of sheepskins is as important as the production of cattle hides. In this paper, the conversion of sheepskin chrome shavings to gelatin, hydrolysate and chrome sulfate is presented as are the chemical and physical properties of these products. The suitability of recovered chrome sulfate as a tanning agent was demonstrated by the tannage of pickled sheepskins, using matched sides comparisons; results are given for runs employing various properties of of recycled to commercial chromium. Chemical analyses in the wet blue stage and three different physical tests in the crust stage were performed on all the leather samples to evaluate the tannage. The results show that there were no significant differences in the leather that had been tanned with either the commercial chromium or the recycled chromium. En ligne : https://drive.google.com/file/d/1AFaZ3M0QgalKmEPzNDvwWzMUIE1AMOze/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4451 [article]

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