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An overview of testing of leather for flame/glow retardance / Kadir Dönmez in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 3 (03/1991)
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Titre : An overview of testing of leather for flame/glow retardance Type de document : texte imprimé Auteurs : Kadir Dönmez, Auteur ; Waldo E. Kallenberger, Auteur Année de publication : 1991 Article en page(s) : p. 93-109 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Various testing methods have been explored for the evaluation of the flame resistance of leather, but much further investigation is steel needed. Preliminary historical and descriptive background for the two primary flame-resistance test methods on leathers treated with various flame-retardant chemicals. First the test methods must be addressed in terms of their advantages and limitations.
Flame/glow retardance depends upon the disruption of the burning process. Four general mechanisms (thermal, coating, gas, chemical) have been proposed to explain the means by which chemicals retard flaming. The flammability of leather must be tested in order to demonstrate compliance with governing regulation in automobile, aircraft and upholstery applications as well as to show the consumer that leather is safe. The two major test methods chosen for this application are the vertical-flame test and the oxygen-index test. The oxygen-index-test method has been developed to minimize operator variation, and to make possible more reliable comparisons of test data from other sources and even comparisons against other materials.
En ligne : https://drive.google.com/file/d/1QCxn-vzXc5PgCU8OZ1BnyZyvX0wRZHvE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8550
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 3 (03/1991) . - p. 93-109[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006878 - Périodique Bibliothèque principale Documentaires Disponible Chromium leachability from blue shavings by the TCLP procedure / Edward E. Menden in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 1 (01/1994)
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Titre : Chromium leachability from blue shavings by the TCLP procedure Type de document : texte imprimé Auteurs : Edward E. Menden, Auteur ; Frank H. Rutland, Auteur ; Waldo E. Kallenberger, Auteur Année de publication : 1994 Article en page(s) : p. 2-13 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Leachability of chromium from leather wastes is a factor of considerable environmental concern. Many factors in the tanning process such as vegetable retanning or chrome leachability in the buffer prescribed by EPA in the Toxicity Characteristic Leaching Procedure (TCLP), and presumably, therefore, in land disposal scenarios where natural forces are at work. A number of simple additions or treatments have been conducted on blue shaving in order to observe the impact upon chromium leachability in the specific conditions required by the TCLP. These observations are offered in the hope that process design and waste treatment might beneficially draw upon this knowledge for greater environmentally responsible operation. En ligne : https://drive.google.com/file/d/1JbBGYuMiIadFqKA2WWWQStT66Hq9cxoQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8138
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIX, N° 1 (01/1994) . - p. 2-13[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006914 - Périodique Bibliothèque principale Documentaires Disponible Combination tannages with vegetable tannins and aluminium / Juan F. Hernandez in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)
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Titre : Combination tannages with vegetable tannins and aluminium Type de document : texte imprimé Auteurs : Juan F. Hernandez, Auteur ; Waldo E. Kallenberger, Auteur Année de publication : 1984 Article en page(s) : p. 182-206 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tannage with a polyphenolic substance followed by the application of dissolved metal salt, specifically vegetable tannins followed by aluminium salts, produces unexpectedly high thermal stability and acid resistance in the final leather. Several explanations have been proposed for these observations, but none realistically account for the synergestic effect, or the specific need to apply the tannage carefully using polyphenolic first followed by the application of metal salt. By demonstrating through laboratory experiments the need to modify the more traditional ideas about straight mineral tannage with respect to the effect of the metal salt reaction, a new, more logical concept of polymer formation is developed and supported through laboratory experimental evidence. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9373
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Code-barres Cote Support Localisation Section Disponibilité 008084 - Périodique Bibliothèque principale Documentaires Disponible Halophilic bacteria in brine curing / Waldo E. Kallenberger in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)
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Titre : Halophilic bacteria in brine curing Type de document : texte imprimé Auteurs : Waldo E. Kallenberger, Auteur Année de publication : 1984 Article en page(s) : p. 104-114 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Halophilic bacteria have been known for many years to be associated with brine cured hides in such forms as "red heat". Controversy continues about their ability to damage hide protein and their resistance to control measures. Laboratory experiments with brine and hide pieces have been empployed to examine these controversial claims. A simple laboratory control has been attained using inorganic metal salts in small concentrations in the brines. The ability of the particular halophilic organisms isolated to degrade hide is also being investigated. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9368
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Code-barres Cote Support Localisation Section Disponibilité 008084 - Périodique Bibliothèque principale Documentaires Disponible Halophilic bacteria thrive in seasonal cycles / Waldo E. Kallenberger in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
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Titre : Halophilic bacteria thrive in seasonal cycles Type de document : texte imprimé Auteurs : Waldo E. Kallenberger, Auteur ; Robert M. Lollar, Auteur Année de publication : 1986 Article en page(s) : p. 248 - 264 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Extremely halophilic bacteria are physiologically unique bacteria. Such unique halophilic bacteria are probably common seasonally on cured hides and in curing brines. The halophiles have been associated with bright pink, red and purple discolorations on salt-cured hides for many years but have not been definitively linked to hide substance deterioration. Several extremely halophilic bacterial types were isolated from cured hides and hide curing brines for study. Several of these isolates were found to be capable of digesting hide protein. A high correlation between collagenolytic activity and gelatinolytic activity was noted, thus indicating a simple and quick potential test for hide damaging halophiles.
One of the more potent hide damaging halophiles was studied more closely. This halophile is similar in many major characteristics to Halobacterium salinarium. The one significant dissimilarity is that this halophile, as well as all other halophilic isolates, grew well in nutrient broth supplemented with a small amount of gelatin in solution as well as in brines with hide pieces. Halobacterium salinarium is not believed capable of strong growth in liquid media. It is suggested that gelatin or collagen are critical substrates for liquid media. It is suggested that gelatin or collagen are critical substrates for liquid media growth. Growth is very slow in liquid media.
In laboratory test and raceway trials hexavalent chromium proved to be an effective control agent for collagenolytic extreme halophiles. As little as 10ppm hexavalent chromium was effective in controlling halophiles in laboratory experiments, but dirty raceway brines required higher chromium concentration. Use of chromium in commercial operation may be regulated by local, state, or federal agencies, therefore such regulations and laws applicable to any particular operation should be considered before use. Other promising control measures include temperature control. These halophiles required high temperatures (greater than 30°C) to grow well and are destroyed by moderately higher temperatures (greater than 60°C).En ligne : https://drive.google.com/file/d/1pQsgKMAr7cuXf8tw5atm95ilfCYs1evk/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9178
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 248 - 264[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008086 - Périodique Bibliothèque principale Documentaires Exclu du prêt Heat, humidity and cure quality / Waldo E. Kallenberger in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
PermalinkProblems associated with hexavalent chromium determination / Frank H. Rutland in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
PermalinkRapid determination of moisture in cured hides by microwave oven / Waldo E. Kallenberger in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)
PermalinkSalt content of cured hide by microwave oven / Waldo E. Kallenberger in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXVI (Année 1981)
PermalinkA study of various types of soaks on the rehydratation of brine cured hides used for vegetable tanned leather / Jean J. Tancous in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 8 (08/1994)
PermalinkThe production of white leather and boil-stable brown leather using titanium / James J. VanBenschoten in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)
PermalinkTotal crude fat determination in hides / Kadir Dönmez in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 12 (12/1994)
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