A comprehensive fuzzy evaluation method for leather softness based on its lastometer property / Huang Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 4 (07-08/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 4 (07-08/2006) . - p. 173-175 Titre : A comprehensive fuzzy evaluation method for leather softness based on its lastometer property Type de document : texte imprimé Auteurs : Huang Xun, Auteur ; Zhang Xiaolei, Auteur ; Yong Zhang, Auteur ; Deming Qian, Auteur Année de publication : 2006 Article en page(s) : p. 173-175 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Cuir Cuirs et peaux -- Analyse Douceur (toucher) Evaluation Logique floue Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather softness is always evaluated fuzzily. In this paper the fuzzy comprehensive method is given which is based on the leather’s lastometer property under different loads. Fuzzy analysis theory is used to evaluate the softness quantitatively, scientifically and objectively. Note de contenu : - FUZZY COMPREHENSIVE EVALUATION METHOD : 1) Define comment set V=[v1, v2, ...., vn] - 2) Set up the evaluation factor set U=[u1, u2, ....,um] - 3) Define the weighting coefficients of the evaluation factors - 4) Evaluation based on single factor - 5) Comprehensive evaluation - APPLICATION EXAMPLE - Table 1 : Evaluation factors and corresponding weight coefficients in fuzzy comprehensive me - Table 2 : The corresponding grades of membership of factors H1 and H2 - Table 3 : The corresponding grades of membership of factors H3 and H - Table 4 : The corresponding grades of membership of factors H5 and H6 - Table 5 : Lastometer heights of one leather sample under the six different loads En ligne : https://drive.google.com/file/d/195VY9DRiyW800sxeGe9ONcLFJdhVna9v/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39117 [article]

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Nanocomposites of acrylate-organosilicon resin/layered silicate for leather finishing / Zhang Xiaolei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 6 (11-12/2006) . - p. 250-253 Titre : Nanocomposites of acrylate-organosilicon resin/layered silicate for leather finishing Type de document : texte imprimé Auteurs : Zhang Xiaolei, Auteur ; Liu Qinglan, Auteur ; Zhang Weiping, Auteur Année de publication : 2006 Article en page(s) : p. 250-253 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition Gonflement (physique) Humidité -- Absorption:Eau -- Absorption Matériaux hybrides Montmorillonite Organosilicones Polyacrylates Polymères -- Propriétés mécaniques Réaction de couplage Silanes Silicates solvants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A type of organophilic montmorillonite (O-MMT) was prepared with a silane coupling-agent. A polyacrylate-organosilicon and its layered silicate nanocomposites (PLS) for leather finishing were prepared by emulsion polymerization. The O-MMT was examined by infrared spectrum (FT-IR). wide-angle X-ray diffraction (WAXD). The results show that the distance hetween the silicate layers increased indicating that the intercalating agents did enter into the gallery space of the montmorillonite. Films of the nanocomposites (PLS) were examined by WAXD and differential scanning calorimetry (DSC), the results prove the formation of exfoliated nanocomposites. Film formation was easy and the film was completely transparent with gond tenacity. The mechanical properties and flexural modulus of the nanocomposite film were improved; especially noteworthy was the glass transition temperature of the film which decreased. Note de contenu : - Preparation of organophilic montmorillonite - Preparation of PLS - Examination of products - Table 1 : The mechanical properties of pure polymer and PLS - Table 2 : The water absorption and solvent swelling of the film - Table 3 : Properties of pure polymer and PLS nanocomposites in leather finishing En ligne : https://drive.google.com/file/d/1A9O_s8IpjfY755VjdnvkWCVv6LXD15Ut/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39258 [article]

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Simultaneous determination of N-methyl-2-pyrrolidone (NMP) and N-ethyl-2-pyrrolidone (NEP) in leather by gas chromatography-mass spectrometry / Sang Jun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 3 (05-06/2015) . - p. 134-138 Titre : Simultaneous determination of N-methyl-2-pyrrolidone (NMP) and N-ethyl-2-pyrrolidone (NEP) in leather by gas chromatography-mass spectrometry Type de document : texte imprimé Auteurs : Sang Jun, Auteur ; Yu Lingyun, Auteur ; Shudong Xie, Auteur ; Feng Zhang, Auteur ; Zhang Xiaolei, Auteur ; Wei Lin, Auteur Année de publication : 2015 Article en page(s) : p. 134-138 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase gazeuse Cuir -- Teneur en solvants Cuirs et peaux -- Analyse Extraction (chimie) N‐éthyl‐2‐pyrrolidone N-méthyl-2-pyrrolidone Le N-méthyl-2-pyrrolidone ou 1-méthyl-2-pyrrolidone, généralement abrégé en NMP, est un liquide incolore ou jaune clair. C'est un amide cyclique (lactame) souvent utilisé en tant que solvant organique.C'est un solvant hygroscopique, miscible avec l'eau et la plupart des solvants organiques. C'est une base faible: une solution aqueuse contenant 10% de NMP a un pH de 7,7-86. Utilisation : Ce composé est principalement utilisé comme solvant à cause de ses propriétés physiques: faible volatilité, stabilité thermique, solvant polaire et aprotique. Ses propriétés toxicologiques en font un bon candidat pour le remplacement de solvants chlorés. Les domaine d'utilisation sont vastes : en pétrochimie, il sert de solvant d'extraction pour les composés aromatiques et le butadiène ou de purification des gaz (récupération du dioxyde de carbone et du sulfure d'hydrogène); en électronique, il sert de solvant de nettoyage pour les wafers de silicium; en chimie, il est utilisé comme solvant de réaction ou de formulation ; comme agent de nettoyage dans l'industrie des métaux (dégraissage). Spectrométrie de masse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : N-Alkyl-2-pyrrolidones such as N-methyl- and N-ethyl-2-pyrrolidone (NMP and NEP) are widely used as solvents in leather finishing agents. However, NMP and NEP were identified as reproductive toxicants. Moreover, NMP has been listed in the Candidate List of Substances of Very High Concern (SVHC) by European Chemicals Agency. Herein, we have developed a simple and rapid gas chromatography-mass spectrometry method for the simultaneous determination of NMP and NEP in leather samples. The extraction solvent, methods and time have bean comparatively investigated and optimized for enhancing the extraction efficiency of NMP and NEP in samples. Under optimal extraction and GC-MS conditions, the linear range of both NMP and NEP were between 0.5 and 100mg L-1 with regression coefficients (R2) of 0.999. The Relative standard deviation (R.S.D.) for ten replications of analysis was 2.6% and 2.8% for NMP and NEP, respectively. And limit of detection (LOD) for NMP and NEP were bath 0.1mg/kg. In leather samples the mean recoveries were 94.8%-105.6% and 98.5%-105.2% for NMP and NEP, respectively. The proposed method has been proved to be applicable for the simultaneous determination of the target NMP and NEP in leather samples. Note de contenu : - EXPERIMENTAL PROCEDURE : Apparatus - Chemicals and reagents - GC-MS conditions - Extraction - Quantification - RESULTS AND DISCUSSION : Extraction solvent selection - Extraction method and extraction time - Specificity - Linearity and detection limit - Recoveries and precision - Application En ligne : https://drive.google.com/file/d/1n6lixOlOvHknZmlCsXZ0TDaZUMP7aqib/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24258 [article]

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The evaluation of leather handle character using neural networks / Huang Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 4 (07-08/2007) . - p. 172-174 Titre : The evaluation of leather handle character using neural networks Type de document : texte imprimé Auteurs : Huang Xun, Auteur ; Zhang Xiaolei, Auteur ; Wang Mengxiao, Auteur ; Yong Zhang, Auteur Année de publication : 2007 Article en page(s) : p. 172-174 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leathers handle and character has been evaluated and classified using an artificial neural network (ANN). Experimental mechanical parameters correlated to elasticity, softness, fullness and extensibility were obtained. The feed-forward neural network used provided accurate modelling between the input parameters, bend constant (Kb) ; compression index (Kc); lastometer coefficient (Kl) ; attenuation constant (αb); attenuation speed constant (K ́) and the output parameter (leather’s handle and graded character). Although only a small number of experimental data were used in training the neural network, the results obtained are comparable to the results of evaluations done by the traditional method. Note de contenu : - Artificial neural network - Leather handle character evaluation using ANN - Table 1 : Training set for ANN of leather handle character - Table 2 : Test samples and test results of ANN En ligne : https://drive.google.com/file/d/1uyenkakt1cue5UGgD1ktKP_NZKnK5A98/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39025 [article]

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The influence of research of leather's ecological properties on its products - Eco-design / Chen Jing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 275-284 Titre : The influence of research of leather's ecological properties on its products - Eco-design Type de document : texte imprimé Auteurs : Chen Jing, Auteur ; Baozhen Cheng, Auteur ; Sun Shiyu, Auteur ; Zhang Xiaolei, Auteur Année de publication : 2014 Article en page(s) : p. 275-284 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bilan des émissions de gaz à effets de serre Cuir Cuirs et peaux -- Aspect de l'environnement Durée de vie (Ingénierie) Eco-conception Environnement -- Etudes d'impact Evaluation du risque Maroquinerie Produits commerciaux -- Cycle de vie Sacs à main Substances dangereuses -- Evaluation du risque Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ecodesign for leather products implies that the different potentiel environmental impacts of the main material, leather and finished products must be taken into account considering its whole life cycle, apart from the general design criteria (i.e. technical, functional, aesthetic or economic). In this paper, a bag made of leather was taken as a case study. A sustainability assessment methodology, given the major concern on carbon footprint (CF) and environmental risk assessment (ERA), were combined to derive complementaty criteria for the ecodesign of leather products, thus the effect of ecological properties of leather on finished products were analyzed. It was concluded that the key to leather product ecodesign is to choose leather. Leather's ecological properties directly determine their values of carbon footprint and environmental risk assessment. It was shown that, the process, clean-energy usage and the waste disposal have impacts on carbon footprint. Different countries and processes resulted in great gaps in leather's carbon footprint. Banned azo colorants have the most carcinogenic risk amongst the hazardous compounds used in the leather industry. Thus, the leather is crucial in the process of ecodesign for leather products, the ecological criteria and supplier selection are rigorous. On the premise of aesthetic design, the perspective provided by the indicators of different nature was balanced to accomplish a fair evaluation. The selection of leather produced under sustainable criteria and the reduction of the materials consumption was recommended, since the area requirements would be minimized and the absence of hazardous compounds would ensure safety conditions during the use stage. Note de contenu : - MATERIALS AND METHODS : Case study - Carbon footprint - Environmental risk assessment - RESULTS AND DISCUSSION : Inventory data - CF results - ERA - Analysis of ecodesign criteria En ligne : https://drive.google.com/file/d/17H7alEoDS0ZgV9LnNZAoAuSdBcFSJfs_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22650 [article]

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The principle and method of testing leather fullness and softness / Peng Wenli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)  

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