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Ajouter le résultat dans votre panierArea measurement of leather and its use in commerce / Axel Landmann in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 1 (01-02/2012)
Titre : Area measurement of leather and its use in commerce Type de document : texte imprimé Auteurs : Axel Landmann, Auteur Année de publication : 2012 Article en page(s) : p. 1-4 Langues : Anglais (eng) Catégories : Conditionnement
Cuir, Travail du
Cuirs et peaux
Hygrométrie
Mesures physiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Area measurement is the basis on which leather is traded. The tanner bases his costing on the cost of the raw material, chemicals used, labour, effluent costs and overheads and profits or losses are determined by the area yield of the particular batch of leather. The customer buys the leather on the basis of the area measurement but the real value to him is the area he incorporates in the articles he sells plus the value (if any) of the off-cuts or unused leather. This paper considers the actuel measurement of the surface area, the pre-conditioning and the influence of conditions of transport and storage before eventual use. Area measurement itself is an empirical method and it is important to specify the conditions of measurement and to realise the influence the changes in conditions can have when eventually the leather is remeasured. Note de contenu : - METHODS OF AREA MEASUREMENT : The pinwheel - The chequer board - Electronic area measurement - Electronic pinwheel
- OTHER METHODS OF MEASUREMENT : Width measurement - Weight - Planimeter
- SMOOTHING OR STRETCHING ?
- CONDITIONING AND THE EFFECT OF STORAGE
- WHY DO WE WANT TO MEASURE AREA ANY WAY ?En ligne : https://drive.google.com/file/d/1MArfhMLp7ynuIpsqHqYitF7g782Gdmv9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13517
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 1-4[article]Réservation
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Titre : The synthesis and application of a high performance amino resin nanocomposite as leather flame retardant Type de document : texte imprimé Auteurs : Ling Huijiao, Auteur ; Yang Jinwei, Auteur ; Xiang Ling, Auteur ; Li Fengying, Auteur ; Luo Minglian, Auteur ; Li Lixin, Auteur Année de publication : 2012 Article en page(s) : p. 5-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Matériaux hybrides
Montmorillonite
Polyamines
Sulfate de tétrakis hydroxyméthyl phosphoniumLe sulfate de tétrakis hydroxyméthyl phosphonium est un myxobactéricide qui offre une prévention efficace contre les biofilms microbiens dans les eaux de traitement, et ce, pour une vaste gamme de micro-organismes formant des biofilms. Le sulfate de tétrakis (hydroxyméthyl) phosphonium agit principalement en augmentant la perméabilité de la membrane externe de l'enveloppe de la cellule microbienne, ce qui entraîne la libération rapide de protéines et d'autres substances cellulaires par les cellules. En outre, le sulfate de tétrakis (hydroxyméthyl) phosphonium inhibe le processus de sulfatoréduction dans les bactéries réductrices de sulfate.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new type of amino resin nanocomposites (THPS-OMMT-MDFP) was synthesized from an amino resin (MDFP), tetra-hydroxymethyl phophonium sulfate (THPS) and modified montmorillonite (OMMT) by an intercalation compounding method. It was characterized by FT-IR, XRD and TG/DTG and applied to the preparation of flame-retardand hide powder and leather. The results of DSC, vertical burning test and the Oxygen Index (OI) showed that the flame-retardant hide powder showed a higher activation energy compared with hide powder and that the flame retardancy and thermostability of the flame-retardant leather had been remarkably improved. As a whole, the results demonstrated that this nanocomposite had good flame-retardant performance and could be widely used in leather. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Equipment - Preparation of flame-retardant amino resin (MDFP) - Preparation of THPS-OMMT-MDFP nanocomposite - Preparation of flame-retardant hide powder - Characterization and performance test of THPS-OMMT-MDFP nanocomposite
- RESULTS AND DISCUSSION : FT-IR analysis - XRD test analysis - Kinetics study on thermal decomposition - Applied researches of the nanocomposites - The analysis of flame-retardant mechanismEn ligne : https://drive.google.com/file/d/1-G_M1e_7ZQgLhlDhaqcF3Kla8Zrx36_s/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13530
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 5-10[article]Réservation
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Titre : Comparison of weathering variables on chrome-tanned and wet-white leather ageing Type de document : texte imprimé Auteurs : Lluis Ollé, Auteur ; Montse Jorba, Auteur ; Joan Carles Castell, Auteur ; Joaquim Font, Auteur ; Anna Bacardit, Auteur Année de publication : 2012 Article en page(s) : p. 11-15 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Effets du climat
Cuirs et peaux -- Détérioration
Essais accélérés (technologie)
Wet-white (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is a natural that can be used in different environments and often under agressive environmental conditions that may cause premature ageing. The most important factors influencing the degradation of leather are temperature, relative humidity and UV radiation. Leathers with chrome tannage and wet-white leathers were exposed to weathering effects using a climatic chamber in order to identify the most important variables affecting this weathering process and to check for interactions. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) have been employed as statistical tools for estimating the effects of the parameters. Note de contenu : - EXPERIMENTAL PROCEDURES : Material - Methodology - Evaluation
- RESULTS AND DISCUSSION : Effect of the weathering variables on physical and fastness properties of the leather - Effect of the weathering variables in the modification of the leather composition - Changes in fibrous structureEn ligne : https://drive.google.com/file/d/1Res6AX5pKtFXaNMiGvx52d2DiiHiTo7I/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13548
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 11-15[article]Réservation
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Titre : Enzymatic hydrolysis of skin shavings for preparation of collagen hydrolysates with specified molecular weight distribution Type de document : texte imprimé Auteurs : Chi Yuanlong, Auteur ; Cui Min, Auteur ; Cui Xiaoju, Auteur ; Wenhua Zhang, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2012 Article en page(s) : p. 16-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux -- Déchets
Hydrolysats de protéines
Hydrolyse enzymatiqueTags : 'Copeaux tannerie' 'Protéase 1398' 2709' Alcalase Papaïne Pepsine 537' Trypsine 'Titration formaldehyde' Electrophorèse 'Ges dodécyl sulfate-polyacrylamide sodium' 'Ultrafiltration centrifuge' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen hydrolysates were extracted from tannery skin shavings through enzymatic hydrolysis by using protease 1398, protease 2709, alcalase, papain, pepsin, protease 537 and trypsin, respectively. The hydrolytic degree and molecular weight distribution (MWD) of the hydrolysages were evaluated by the formaldehyde titration method, sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), tricine-SDS-PAGE and centrifugal ultrafiltration. It was found that the MWD of the as prepared collagen hydrolysates has a close correlation with the hydrolytic degree, and greatly depends on the enzyme employed. The low molecular weight (MW) collagen hydrolysates, with relatively high hydrolytic degree, were obtained by enzymatic hydrolysis using protease 1398, protease 2709, papain and alcalase. More than 60% (mass ratio) of the fractions in these four hydrolysates were in the molecular weight range of <10kDa. The use of protease 537 produced medium-MW collagen hydrolysages where 40% of the fractionswere of 10-30kDa. The high-MW collagen hydrolysages that include about 66% fractions with molecular weights higher than 20kDa were obtained by using pepsin, accompanied by the lowest hydrolytic degree. This research provides a potential approache for molecular weight and molecular weight distribution control collagen hydrolysates by enzymatic hydrolysis ot tannery skin wastes. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Determination of hydrolytic degree of collagen - SDS-PAGE and tricine-SDS-PAGE determination - Centrifugal ultrafiltration analysis
- RESULTS AND DISCUSSION : Hydrolytic degree analysis
- SDS-PAGE and tricine-SDS-PAGE patterns - Centrifugal ultrafiltration analysis on MWDEn ligne : https://drive.google.com/file/d/1NEe4OCKiTxbrMEX3emn2sQFAzagsFJQc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13549
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 16-20[article]Réservation
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Titre : Cleaner chrome tanning - A non-pickling process using an aliphatic aldehyde as pre-tanning agent Type de document : texte imprimé Auteurs : Luo Jian-Xun, Auteur ; Jing Li, Auteur ; Liao Xue-Pin, Auteur ; Zhang Wen-Hua, Auteur ; Bi Shi, Auteur Année de publication : 2012 Article en page(s) : p. 21-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aldéhydes aliphatiques
Prétannage
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery effluent with high salinity can have a serious environmental impact. The pickling process that involves the use of sodium chloride and acids is one of the main origins of salt pollution. In this study, a non-pickling chrome tanning technology was developed. A macromolecular aliphatic aldehyde, PTA, was synthesized and employed to pre-tan bated pelt before chrome tanning go that the conventional pickling process was eliminated. It was found that PTA possesses moderate tanning property itself and favours the penetration of chrome, resulting in a chrome exhaustion of 90%. Meanwhile, the performance of leather was comparable to the conventionally processed leather in terms of hydrothermal stability and property evaluations. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Scanning electron microscope analysis - Dyeing and fatliquoring of chrome tanned leathers - Pilot experiment and property determination of the leathers.
- RESULTS AND DISCUSSION : Tanning characteristics of PTA - Comparison of non-pickling chrome tanning and conventional chrome tanning - Uptake od dyestuff and fatliquor in non-pickling and conventional chrome-tanned leathersEn ligne : https://drive.google.com/file/d/1cUFL4yqhaBGMTGmRtHUwwDhxPT-r2I6o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13550
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 21-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13659 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Upgrading of rural garad-tanned crust leathers Type de document : texte imprimé Auteurs : A. E. Musa, Auteur ; G. A. Gasmelseed, Auteur Année de publication : 2012 Article en page(s) : p. 27-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants
Agents de blanchiment
Chaussures
Cuir -- Séchage
Cuirs et peaux
Cuirs et peaux -- Teinture
Produits de nourriture du cuir
Retannage
Sulfate d'aluminium
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The present work was caried out to improve Sudanese rural garad tanned crust leathers for production of semi-alum shoe upper leathers. The usual process sequence consists of stripping, bleaching, retannage with aluminium sulphate prepared solution, neutralization, dyeing, fatliquoring, drying and finishing. The physical and chemical characteristics of the leathers produced are compared with control leathers and standard physical properties and showed good agreement. The leathers produced are full, soft, flexible with high tensile strength. The stripped rural garad-tanned leathers were retanned with 2% Al203 ; giving a high shrinkage temperature of 101°C. The leathers produced are full, soft, flexible with high tensile strengh with good organoleptic and strength properties. This confirms that this type of retannage is a promising alternative to traditional chrome tanning. Note de contenu : EXPERIMENTAL - MATERIALS : Preparation of basic aluminum sulphate solution - Upgrading of rural garad-tanned crust leathers - Measurement of hydrothermal stability of leathers - Physical testing and hand evaluation of leathers - Evaluation of chemical constituents in leathers
- RESULTS AND DISCUSSION : Upgrading of rural garad-tanned crust leathers - PERFORMANCE OF LEATHERS : Bulk properties of leathers - hand evaluation of leathers - Strength characteristics of experimental and control crust leathersEn ligne : https://drive.google.com/file/d/1SJG7iaCMxr0eT9vDUfXpWXyRxqpag3w2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13551
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 27-31[article]Réservation
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Titre : Dynamic light scattering and zeta potential of a leather finishing system Type de document : texte imprimé Auteurs : Xia Yan, Auteur ; Zhao Pengxiang, Auteur ; Wuyong Chen, Auteur Année de publication : 2012 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants
Cuirs et peaux -- Finition
Polyacryliques
Polymères en émulsion
Polyuréthanes
Potentiel zeta
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Finishing is one of the significant steps in the process by which the tanning industry transforms leather into an end-product. Therefore, a deep study of the finishing system is necessary to help the control of this step and bring innovation to the finishing process. Based on principles of dynamic light scattering (DLS) and zeta potential, the stability of a leather finishing system was investigated. Polyrethane and acrylic resin were used to prepare a single finishing system and wax emulsion, silicone oil and pigment paste were added to the single finishing system to make three binary finishing systems, then a ternary system was prepared by adding was emulsion and silicone oil to the single finishing system.
The particle size and zeta potential of the single, binary and ternary finishing systems were characterized using the zetasizer nano-ZS (Malvern Instruments Ltd., UK). The results showed that the stability of the finishing system was not affected with the addition of was emulsion and silicone oil, because the zeta potential was always greater than 30mv, however ; a significant decrease of zeta potential was observed due to the addition of pigment to the finishing system, which indicates a decrease of the finishing system's stability. The results provide a comprehensive and theoretical understanding of the interactions among materials in a finishing system.Note de contenu : - EXPERIMENTALE PROCEDURE : Materials - Preparationof samples for the test of particle size and zeta potential - Measurement of particle size distribution and zeta potential of finishing system
- RESULTS AND DISCUSSION : Particle size distribution - Zeta potential of finishing systemEn ligne : https://drive.google.com/file/d/1sLX_CMIVNamg502Rrvg4YI-sRkBuUw3j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13552
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 32-36[article]Réservation
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| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 13659 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
