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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.
Croûte (cuir)
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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.
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Physico-insight on sewability properties of crust leathers using melamine syntan and synthetic fatliquor / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 10 (10/2022)
[article]
Titre : Physico-insight on sewability properties of crust leathers using melamine syntan and synthetic fatliquor Type de document : texte imprimé Auteurs : Gladstone Christopher Jayakumar, Auteur ; C. Niklesh, Auteur ; S. Jeyas Kandhan, Auteur ; K. Krishnaraj, Auteur Année de publication : 2022 Article en page(s) : p. 407-411 Note générale : Bibliogr. Langues : Américain (ame) 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.
Cuir -- Couture
Cuirs et peaux -- Propriétés mécaniques
Huiles et graisses
Matériaux -- Fissuration
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
SyntansIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather being a natural material finds a most prominent position in the fashion field. Leather goods, garments and products symbolize luxury and comfort. Manufacturing of leather products requires meeting the physical and chemical norms stipulated by the international agencies depending on the end products. Among the various physical properties, sewability is very important in deciding the quality of manufactured products. The present research discusses about the effect of syntan and fatliquor on leather properties. Experiments have been designed with varied concentration of melamine syntan along with 10% fatliquor. Various physical characterizations such as sewability, tensile strength, grain crack and microscopic images have been studied to elucidate the effect of syntan and fatliquor on leather properties. The experimental results show that the presence of fatliquor is a critical component to achieve better sewability properties in leather. Similar effect has been observed in the case of grain crack and tensile strength of the crust leathers. Prosaically, the experimental data have shown that the usage of fatliquor shows better sewability property. Note de contenu : - MATERIALS AND METHODS : Physical testing of the sample - Sewability analysis - Optical microscopic studies
- RESULTS AND DISCUSSION : Strength characteristics
- Table 1 : Experimental process
- Table 2 : Sewability measurements
- Table 3 : Lastometer - Grain crack
- Table 4 : Tensile strength and elongation measurementsDOI : https://doi.org/10.34314/jalca.v117i10.6180 En ligne : https://drive.google.com/file/d/1nVi7IQINJJSagwwzxTN7W5FsAPQKaZQY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38226
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Code-barres Cote Support Localisation Section Disponibilité 23652 - Périodique Bibliothèque principale Documentaires Disponible Poly(N-acryloyl ciprofloxacin-co-acrylic acid)-incorporated waterborne polyurethane leather coating with long-lasting antimicrobial property / Jinming Chang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)
[article]
Titre : Poly(N-acryloyl ciprofloxacin-co-acrylic acid)-incorporated waterborne polyurethane leather coating with long-lasting antimicrobial property Type de document : texte imprimé Auteurs : Jinming Chang, Auteur ; Gaofu Yang, Auteur ; Qi Zeng, Auteur ; Zhonghui Wang, Auteur ; Zhou Xu, Auteur ; Yi Chen, Auteur Année de publication : 2017 Article en page(s) : p. 15-22 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Copolymères -- Synthèse
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 -- Finition
Polymères -- Synthèse
Polymères en émulsion
PolyuréthanesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : o overcome the leaching problem associated with low-molecular-weight antimicrobial agents, a water soluble antimicrobial polymer, poly(N-acryloyl ciprofloxacin-co-acrylic acid), was designed and synthesized via acryloylation of the secondary amine in 7-piperazinyl substituent of ciprofloxacin and subsequent copolymerization with acrylic acid. The structure of the copolymer was characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectra, X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The copolymer was compatible with waterborne polyurethane for leather finishing, and remained antimicrobial even though the parent structure of ciprofloxacin molecule was altered. When incorporated into waterborne polyurethane leather coating as an antimicrobial agent, poly(N-acryloyl ciprofloxacin-co-acrylic acid) proved seldom leached out from the coating even after being rinsed for ten times. Based on these results, the water soluble antimicrobial copolymer designed in this study may prevent depletion of antimicrobial function of waterborne polyurethane leather coating, extending the lifetime of the leather products and enhancing their hygiene properties. Note de contenu : - Materials - Preparation of N-acryloyl ciprofloxacin (NACPF)
- Synthesis of Poly(N-acryloyl ciprofloxacin-co-acrylic acid)
- Characterization of Poly(NACPF)-co-AA)
- Crust leather finishing by Poly(NACPF)-co-AA) incorporated WPU
- Scanning Electron Microscope (SEM) observatin
- Bactericidal test
- StatisticsEn ligne : https://drive.google.com/file/d/123bCchShzKFoVumI-TtZ60-U7yV0pE91/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27565
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Code-barres Cote Support Localisation Section Disponibilité 18607 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of thermally expandable microspheres for foam coating / Guodong Huang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 7 (07/2021)
[article]
Titre : Preparation and properties of thermally expandable microspheres for foam coating Type de document : texte imprimé Auteurs : Guodong Huang, Auteur ; Zhixian Lin, Auteur ; Haojun Fan, Auteur ; Jun Xiang, Auteur ; Chong Zheng, Auteur ; Zhiqing Luo, Auteur Année de publication : 2021 Article en page(s) : p. 249-259 Note générale : Bibliogr. Langues : Américain (ame) 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 -- Finition
Fleur du cuir
Formulation (Génie chimique)
Microsphères
Moussants
Mousses plastiques
Polyacétate de vinyle
Polyacrylonitrile
Polymères expansés
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Résistance chimique
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A type of thermally expandable microspheres (TEMs) for foam coating was prepared by suspension polymerization with acrylonitrile (AN), methyl methacrylate (MMA), vinyl acetate (VAC) as shell polymer monomers and i-pentane as core foaming agent. The effects of an aqueous additive (Sodium Chloride, NaCl) on the size and distribution of TEMs, and the effects of crosslinking degree, i-pentane dosage and monomer mass ratio on the expansion property, expansion temperature and solvent-resistance of TEMs were investigated. The results showed that when the dosage of NaCl was close to the saturation solubility (30%), the dosage of crosslinking agent and alkane were about 0.09% and 7.4%, and the mass ratio of AN/MMA/VAC w rm distribution and good solvent resistance, the expansion diameter ratio was 5 times under 110~120 C, which meets the application requirements for foam coating of leather or synthetic leather. Note de contenu : - MATERIALS AND METHODS : Experimental materials - Preparation of TEMs - Preparation of foaming coating - Finishing of split leather and damaged grain leather
- CHARACTERISTICS OF TEMS : Determination of particle size and distribution - Observation on surface morphology - Determination of expansion property and temperature
- RESULTS AND DISCUSSION : Structure design of TEMs - Effect of NaCl concentration on the size and distribution of TEMs - Effect of crosslinking degree on the expansion property and temperature of TEMs - Effect of dosage of alkane on expansion property and temperature of TEMs - Effect of monomer mass ratio on expansion property, temperature and solvent resistance of TEMs - Morphology of split leather foam coating - Matting and mending effect of foaming coating
- Table 1 : The basic formula for preparing TEMs
- Table 2 : Foaming properties and foaming temperature of TEMS with different content of EGDMA
- Table 3 : Effect of foaming agent dosage on the expansion property and foaming temperature of thermally expanded microspheres
- Table 4 : Effect of monomer ratio on the expansion property and expansion temperature of thermally expanded microspheresDOI : https://doi.org/10.34314/jalca.v116i7.4336 En ligne : https://drive.google.com/file/d/1i1pJAJAQnAwYRmogNbezp7Ho-pyNhhl1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36082
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Code-barres Cote Support Localisation Section Disponibilité 22869 - Périodique Bibliothèque principale Documentaires Disponible Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather / Huang Yingying in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
[article]
Titre : Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather Type de document : texte imprimé Auteurs : Huang Yingying, Auteur ; Jinxia Du, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 93-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Copolymère ester acrylique
Copolymères -- Synthèse
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.
Epoxydes
Glutaraldéhyde
Huiles et graisses
Polymères amphiphiles
Polymérisation en émulsion
Produits de nourriture du cuir
Résistance à la déchirure
Tannage chrome free
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Acrylic-acrylic long-chain ester amphiphilic copolymers are a class of leather retanning and fatliquoring materials with superior properties. However, these types of copolymers lack reactive groups and possess weak binding ability to organically-tanned leather. In this paper, a terpolymer Poly(AA-LA-GMA) containing reactive epoxy groups was prepared by emulsion copolymerisation of acrylic acid (AA), dodecyl acrylate (LA) and glycidyl methacrylate (GMA) monomers. The effect of the GMA content on its binding ability to leather fibres and its fatliquoring properties was investigated. The results showed that the introduction of the epoxy group can significantly improve the combination of copolymer with glutaraldehyde-tanned leather. When the content of GMA monomer reached 10% of the total monomer amount (mol), the dichloromethane extraction rate and fogging value of the fatliquored leather were reduced by about 34% and 53%, respectively. And the excellent binding ability improved the softness and tear strength of the fatliquored leather. Note de contenu : - INTRODUCTION : Materials - Synthesis of epoxy-modified amphiphilic copolymers - Determination of the content of the residual monomer - Fourier Transform Infrared spectroscopy (FTIR) - Application of Poly(AA-LA-GMA) in the fatliquoring process - Determination of the absorption rate of fatliquor - Determination of softness and tear strength of crust leather - Determination of dichloromethane extraction rate - Determination of fogging value
- RESULTS AND DISCUSSION : Preparation and characterisation of Poly(AA-LAGMA) - Fatliquoring effects of Poly(AA-LA-GMA) on chrome-tanned leather - Fatliquoring effect of Poly(AA-LA-GMA) to glutaraldehyde-tanned leather - Action mechanism between epoxy-modified amphiphilic copolymer and leather
- Table 1 : Fatliquoring effects of amphiphilic copolymers to chrome-tanned leather
- Table 2 : Fatliquoring effects of amphiphilic copolymers to glutaraldehyde-tanned leather
- Fig. 1 : Schematic of the copolymerisation reaction
- Fig. 2 : Action mechanism between epoxy-modified amphiphilic copolymer and leatherEn ligne : https://drive.google.com/file/d/1KByCAQkl2D1o3TmoIgqbuA3ZMjFh8hZt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39579
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Code-barres Cote Support Localisation Section Disponibilité 24110 - Périodique Bibliothèque principale Documentaires Disponible Preservation of bovine hide using less salt with low concentration of antiseptic, Part II : Impact of developed formulations on leather quality and the environment / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 10 (10/2018)
[article]
Titre : Preservation of bovine hide using less salt with low concentration of antiseptic, Part II : Impact of developed formulations on leather quality and the environment Type de document : texte imprimé Auteurs : Majher I. Sarker, Auteur ; Wilbert Long, Auteur ; George J. Piazza ; Nicholas P. Latona ; Cheng-Kung Liu Année de publication : 2018 Article en page(s) : p. 335-343 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiseptiques
Bactéries -- Comptage
Bain de trempe
Chimie analytique
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 -- Conservation
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Déchets -- Réduction
Eaux usées -- Analyse
Evaluation
Formulation (Génie chimique)
Microscopie électronique à balayage
Pollution -- Lutte contreIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The traditional method for bovine hide preservation requires approximately 40-50% sodium chloride on raw hide weight or 95% saturated brine solution in case of wet salting. This salt resides in wastewater after the soaking process and generates a huge environmental pollution in the form of total dissolved solids (TDS) and chlorides (Cl-) during leather processing. The current research has developed antiseptic based hide curing formulation using 45% saturated brine solution which reduces 50% salt usage in compare to traditional method. The newly developed formulations have been found more effective in limiting microbial growth on cured hide than the conventional method preserving the bovine hide for more than 30 days. In this study, post-leather analysis e.g. grain pattern, scanning electron microscopic images, mechanical properties and organoleptic evaluation reveal that the crust leather produced from alternatively cured hides are comparable to the control obtained from traditionally preserved hide. The efficacy of the alternative system is also assessed by monitoring the environmental impacts caused by the leather processing effluents on the basis of TDS and chloride content, total solids (TS), total aerobic bacterial counts in soaking liquor, Bio-Chemical oxygen demand (BOD) and Chemical oxygen demand (COD). The environmental advantages of the alternative hide curing method are determined particularly by 50% reduction of TDS and chloride content. Therefore, this new method is feasible and industrially preferable to the traditional hide curing process. Note de contenu : - EXPERIMENTAL : Materials - Laboratory scale protocol for the alternative hide preservation - Analysis of soaking liquid generated in leather processing - Total aerobic bacterial colony count of soaking liquor - Analysis of TOC and COD in soaking liquor - BOD Analysis of soaking liquor - Tanning of cured hides - Evaluation of leather quality - Microscopic imagining
- RESULTS AND DISCUSSION : Aerobic bacterial colony count determination - Chloride content determination - Determination of TOC and COD in soaking liquor - Determination of BOD - Determination of solid polluants - Quality determination of crust leather - Grain surface pattern study - Surface image of crust leather using scanning electron microscope - Determination of mechanical properties of leather - Subjective evaluation of leatherEn ligne : https://drive.google.com/file/d/1B7igaBkCvu9Oiy-sIBEL1uBDEn0ZF64o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31097
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Code-barres Cote Support Localisation Section Disponibilité 20280 - Périodique Bibliothèque principale Documentaires Disponible Preservation of hides with sulfite. II. A matched side comparison of leathers from hides preserved with sodium sulfite or brine curing / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
PermalinkPretreatment with condensate of glyoxal and n-thioureidopyromellitamic acid for a stable aluminium tannage / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 4 (07-08/2004)
PermalinkPreventing enzymatic damage to hides by timely inhibition of trypsin activity with soybean flour during bating process / Tingyuan Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 6 (06/2023)
PermalinkLa rationalisation du tannage végétal-synthétique - Remarques sur la théorie et la pratique d'un système de tannage végétal rapide / E. Komarek / Leverkusen [Allemagne] : Bayer (1965)
PermalinkRedevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkRedevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 3 (05-06/1978)
PermalinkRegion wise surface level defect detection and ranking of crust leather images based on image processing techniques / S. Nithiyanantha Vasagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 7 (07/2023)
PermalinkRemoval of proteoglycans in animal hides by glycosidase to promote opening-up of collagen fiber bundles : optimization of glycosidase and its application in the soaking process / Xiang Zhong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)
PermalinkSalt free preservation of raw goat skin using swietenia mahogany (seed) extract / Md. Abdur Razzaq in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 2 (02/2022)
PermalinkStable aluminium tannage with a copolymer of n-thioureidomal acid with acrylic acid / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkStudies on the correlation between surface and sewability properties of crust leather / C. Niklesh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 5 (05/2023)
PermalinkStudies on the ethiopian camel hides for their suitability for making leather / M. Belay in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 2 (02/2019)
PermalinkStudies on the fabrication of hydrophobic coating incorporating bentonite clay and its effect on the physical properties of the finished leather / Renganath Rao Ramesh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)
PermalinkStudy of the mechanical characteristics of dried leather / Soufien Azzouz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)
PermalinkSynthesis, characterization and application of sulphite castor maleic adduct as an effective leather fatliquor / Muhammad Imran-Ul Haq in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 5 (09-10/2016)
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