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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Thermofix thermal fixation and volume reduction of trivalent chromium-containing wastes and sludges / Bradford H. Jones in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
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Titre : Thermofix thermal fixation and volume reduction of trivalent chromium-containing wastes and sludges Type de document : texte imprimé Auteurs : Bradford H. Jones, Auteur ; Richard L. Alexander, Auteur Année de publication : 1986 Article en page(s) : p. 322-330 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The handling and disposal of chromium containing wastes generated by leather manufacturing processes has been a major environmental issue demanding much attention, time and money. Most of these wastes are being landfilled. Sludge landfills are often controversial because the public is concerned about the generation of odors and the potential release of chromium into the environment. A more economical and environmentally acceptable alternative sludge management process, called Thermofix, has been developed by Jones&Beach Engineers, Inc.
Thermofix is a pyrolytic volume reduction and heavy metal stabilization process. The resulting char residue typically weighs about 20 percent if the weight of the wastes being processed. The char residue contains the heavy metals (chromium) concentrated and tightly bound within an insoluble (hence nonleachable) carbon matrix.
Extensive bench and pilot scale testing of the process has been conducted for municipal and industrial clients faced with the expensive disposal of heavy metal contamined sludges. Laboratory tests of the Thermofix products resulting from the processing of concentrated, chromium-laden wastes, have shown that leachables of the char generated by EPA's EP Extraction Procedure typically contains less that 5 percent of the allowed amounts of chromium. The resulting stabilized char residue can be stored, transported and disposed of without the risks and costs associated with handling Hazardous Wastes.
The Thermofix process has taken advantage of existing technology and reliable equipment to accomplish a new goal-metal stabilization and volume reduction. The components are easily transportable, packaged units, selected with an emphasis on relatively low cost and operational flexibility.
Tables present the approximate capital investment and the expected annual operations and maintenance costs. Laboratory data, including sludge bulk analysis, residue char bulk analysis, and EP Toxicity leachate concentrations demonstrate the effectiveness of the process.
The future prospects of recovering the chromium from the char on a regional basis will depend on market conditions. A potential, economic incentive to recover this metal would have to offset the investment in facilities necessary for handling, storage and transportation of the stabilized Thermofix char residue.En ligne : https://drive.google.com/file/d/1bZJBg5PdiGAlZHF2uFVf_Fxb0I5cK2za/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9190
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 322-330[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008086 - Périodique Bibliothèque principale Documentaires Exclu du prêt Thermophysical and functional-consumer qualities of shoe upper leather / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
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Titre : Thermophysical and functional-consumer qualities of shoe upper leather Type de document : texte imprimé Auteurs : Nataliia Pervaia, Auteur ; Olga Andreyeva, Auteur ; Lesia Maistrenko, Auteur ; Larysa Ocheretna, Auteur Année de publication : 2020 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux -- Propriétés thermiques
Cuirs et peaux de bovins
Maléique, Acide
Perméabilité
Porosité
Résistance à la traction
Résistance thermique
Tige de la chaussure
Vapeur d'eauIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays, the production of shoes having certain functional-consumer qualities requires materials, which meet all final product requirements, are environmentally safe and do not overcomplicate the production cycle. In this paper the influence of conditions of using a polymeric material based on maleic acid prior to dyeing the bovine shoe upper leather was studied. According to the results of electron microscopic examination, as well as evaluation of the physico-mechanical and thermophysical properties of the leather it was revealed that the use of polymeric material contributes to the formation of structure and such important indices of the derma as tensile strength, grain strength, extension, water vapour permeability, apparent density, porosity, heat resistance and thermal absorptivity. On the basis of a generalised objective function, optimal processing variants were defined. Recommendations of leather production parameters taking into account the season of shoe exploitation (autumn/winter, spring/summer) have been made. Note de contenu : - EXPERIMENTAL SECTION : Materials - Leather semi-ifinished product processing techniques - Research methods and equipment
- RESULTS AND DISCUSSION : Crusting processes planning matrix
- Table 1 : Variation intervals and levels of factors
- Table 2 : Crusting processes planning matrixEn ligne : https://drive.google.com/file/d/1Va3RwRsD7eUSc4oOwpONqicTwMW2rSNw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33539
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 1. The triple helical models / James M. Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 12 (12/1991)
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Titre : Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 1. The triple helical models Type de document : texte imprimé Auteurs : James M. Chen, Auteur ; Stephen H. Feairheller, Auteur ; Eleanor M. Brown, Auteur Année de publication : 1991 Article en page(s) : p. 475-486 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Molecular modeling methods were applied to the development of three dimensional structures of typ 1 collagen triple helices. The initial model was based on a triple helix of (Gly-Pro-Hyp). The amino acid sequences of the alpha 1 and 2 chains of calf skin Type 1 structure was nergy minimized to form all possible stabilizing interactions within the protein. Specific intraction sites which may contribute to the stability of the collagen molecule can be identified in the triple helical modls. The models may be used to target potential domains in collagen that contain sites for crosslinking reactions with chronium and other agents; determine what constraints on size, shape and molecular characteristics are likely to describe the optimum crosslinking agents; and suggest the application of which analytial and spectroscopic will give the most rigorous test of the computer models. En ligne : https://drive.google.com/file/d/18kTOW6lP6Lr1yGyAdYw8jURC0V0eAo3P/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8333
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Code-barres Cote Support Localisation Section Disponibilité 006887 - Périodique Bibliothèque principale Documentaires Disponible Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 2. The "smith" microfibril / James M. Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 12 (12/1991)
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Titre : Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 2. The "smith" microfibril Type de document : texte imprimé Auteurs : James M. Chen, Auteur ; Stephen H. Feairheller, Auteur ; Eleanor M. Brown, Auteur Année de publication : 1991 Article en page(s) : p. 487-497 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Molecular modeling methods were applied to the development of a three dimnsional structure for a Type 1 collagen microfibril model. The model was based on the energy minimized "smith" microfibril model containing the consesus plypeptide sequence (Gly-Pro-Hyp). The amido acid sequences of the alpha 1 and 2 chains of calf skin Type 1 collagen were substituted into the "collagen-like" (Gly-Pro-Hyp) "smith" microfibril model. The model was then energy minimized using molecular mechanics and evaluated structurally using graphics. Specific interaction sites which may contribute to the stability of collagen packing can be identified in this model. Computer graphics was used to display the Type 1 "smith" microfibril model to determine specific domains containing sites which would facilitate the evaluation of potential crosslinking agents. The Type 1 model can be used to suggest domains in collagen that contain on size, shape and molecular characteristics are likely to describe the optimum crosslinking agents; and the application of which analytical and spectroscopic techniques to real systems will give the most rigorous test of the computer models. En ligne : https://drive.google.com/file/d/1fUzaWSfuzZE6aS7ddhruaqPVy2zZ2Ywy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8334
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Code-barres Cote Support Localisation Section Disponibilité 006887 - Périodique Bibliothèque principale Documentaires Disponible Three-dimensional spatial distribution analysis of fibre in wet-blue pig leather / Jing Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
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Titre : Three-dimensional spatial distribution analysis of fibre in wet-blue pig leather Type de document : texte imprimé Auteurs : Jing Li, Auteur ; Honglei Teng, Auteur ; Suqing Liu, Auteur ; Jing Xu, Auteur ; Tianduo Li, Auteur Année de publication : 2018 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux de porcs
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the paper, the ratio of spatial distribution of fibre in wet-blue leather obtained from the spinal region of adult pigskin is researched in both horizontal and vertical directions. Furthermore, the regularity of spatial distribution of fibre is further analysed by the Hurst exponent H. Such spatial structure analyses are essential to obtain true 3D data, including the shape, size and orientation of fibres. We demonstrate that the data sets can be obtained by serial paraffin sections using a series of improved techniques, such as serial-sectioning, SEM imaging and locating techniques. In the study, stacks of several hundred sections 4µm thick have been obtained to evaluate their spatial relationships. We find that the ratio of spatial distribution of fibre is always fluctuation in a narrow range in both horizontal and vertical directions in wet-blue leather. The information studied in the paper will be of central importance in leather structure research for providing a scientific path to analyse intrinsic leather strength and the process of chemical treatment. Note de contenu : - EXPERIMENTAL PROCEDURES : A Sample preparation and serial sections - B. Imaging and locating
- RESULTS AND DISCUSSION : A. Serial-sectioning - B. Imaging - C. Location - D. Quantitative measurements
- Fig. 1 : The high-contrast images obtained using a low-vacuum SEM at a magnificationof (A) 50X, (B) 500X, (C) 1000X and (D). Spot size : 6.3 ; contrast : 90 ; brightness : 10
- Fig. 2 : The light microscopy images obtained from six consecutive slices paraffin-embedded with little deformation by serial-sectioning technique
- Fig. 3 : The curves showed the locating precision throughout a stack of images from the fibre network
- Fig. 4 : The SEM images showing mean area occupied by fibres (black) and by interspaces (white)
- Fig. 5 : he curve shows the ratio of spatial distribution of fibre in vertical direction in wet-blue leather. The magnification of images is 40X
- Fig. 6 : The curve shows the ratio of spatial distribution of fibre in vertical direction in wet-blue leather. The magnification of images is 100X
- Fig. 7 : The curve shows the ratio of spatial distribution of fibre in horizontal direction in wet-blue leather. The magnification of images ranged from 50X to 6000XEn ligne : https://drive.google.com/file/d/1KexZvlIdAv2aSjxJOXNxHdZR_SncUZPF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30790
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Code-barres Cote Support Localisation Section Disponibilité 20058 - Périodique Bibliothèque principale Documentaires Disponible Through the looking glass (Part 1) / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 58 (03-04/2023)
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PermalinkThrough the looking glass (part 2) / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 59 (05-06/2023)
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PermalinkPermalinkPermalinkTone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
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PermalinkTopographic differences in physical properties / A. Vos in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
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PermalinkTopographic distribution of properties in softy shoe upper leathers / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 5 (09-10/1977)
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PermalinkTopographic distribution of properties in softy shoe upper leathers / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
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PermalinkTopographic distribution of properties in softy shoe upper leathers / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 6 (11-12/1977)
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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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PermalinkTotal dissolved solids management (TDS) in tanneries / A. Sahasranaman in WORLD LEATHER, Vol. 14, N° 7 (11/2001)
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PermalinkToxicité et biodégradabilité des constituants principaux des effluents de tannerie / Arlette Folachier in TECHNICUIR, N° 2 (02/1978)
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