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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Low-VOC high-performance waterborne epoxy systems in protective coating application / Yong Zhang in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 1 (01/2017)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 1 (01/2017) . - p. 46-59 Titre : Low-VOC high-performance waterborne epoxy systems in protective coating application Type de document : texte imprimé Auteurs : Yong Zhang, Auteur Année de publication : 2017 Article en page(s) : p. 46-59 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Epoxydes Essais accélérés (technologie) Essais dynamiques Formulation (Génie chimique) Métaux -- Revêtements protecteurs Primaire (revêtement) Résistance chimique Réticulants Revêtements de sols industriels Revêtements en phase aqueuse:Peinture en phase aqueuse Rhéologie Viscosité Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : The author discusses formulation of low-VOC and high-volume-solids coatings with improved performance over currently available commercial products. Waterborne epoxy dispersions show promise in a variety of applications, ranging from garage floor and architectural coatings to heavy-duty industrial coatings. Note de contenu : - FIGURES : 1. Viscosity as a function of time from initial mixing for five WB curing agents in a 30.5 PVC/44-percent volume solids 1-Type epoxy dispersion-based anticorrosive primer formulation - 2. Anticorrosive primers on blasted steel panels after 500 hours of salt spray exposure - 3. Anticorrosive primers on blasted steel panels after 1,000 hours of salt spray exposure - 4. Zinc-rich primers on blasted steel panels after 500 hours of salt spray exposure - 5. Zinc-rich primers on blasted steel panels after 1,000 hours of salt spray exposure - 6. Spider plot of performance properties of zinc-rich primers - 7. Spider plot of performance properties of anticorrosive primers - 8. Pigmented formulation performance comparison - 9. Clear formulation performance comparison - TABLES : 1. Coating performance for five WB curing agents in a 30.5 PVC/44-percent volume solids anticorrosive primer formulation - 2. Coating performance for different WB curing agents in a three-component zinc-rich primer formulation - 3. Cleveland humidity performance for anticorrosive primer formulations as a function of WB curing agent, PVC and Amine/epoxy ratio - 4. Zinc-rich primer formulation - 5. Anticorrosive primer formulation - 6. Performance properties of anticorrosive and zinc-rich primers - 7. Clear garage floor formulation WBE-C - 8. Pigmented garage floor formulation WBE-P - 9. Description of commercial 2K waterborne epoxy garage floor coatings - 10. Pendulum hardness (seconds) - 11. Dry time - 12. Chemical resistance - 13. Taber Abrasion (Weight Loss After 1,000 Cycles) En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5984 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28376 [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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Unique additives for high-performance industrial protective coatings / Yong Zhang in COATINGS TECH, Vol. 20, N° 3 (05-06/2023)  

[article]  inCOATINGS TECH > Vol. 20, N° 3 (05-06/2023) . - p. 56-62 Titre : Unique additives for high-performance industrial protective coatings Type de document : texte imprimé Auteurs : Yong Zhang, Auteur ; Bridgette Hendrix, Auteur Année de publication : 2023 Article en page(s) : p. 56-62 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes Essais de résilience Essais dynamiques Polyphénoxy Réticulants Revêtements -- Propriétés physiques Revêtements bi-composant Revêtements en phase aqueuse -- Additifs Revêtements organiques Revêtements protecteurs Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) epoxy coatings have long been used for industrial protective applications due to their excellent adhesion to a wide range of substrates, superior chemical resistance, and good mechanical properties.1 Today, those in the industry who are looking for innovations that can boost coating performance heavily prioritize high performance and productivity in particular. Their main goal is to extend coating life service time and use the fewest coating layers possible. Additives, or performance boosters, are commonly used for this purpose in a formulation. One example of an additive is tougheners, which are used in many high-performance industrial protective coatings to improve their toughness, flexibility, adhesion, and long-term performance. Phenoxy resins are unique polymerbased additives that have become available to formulators. Phenoxy resins are the product of bisphenol A and epichlorohydrin, with the epoxide ring opened. They are a tough and ductile thermoplastic material with high cohesive strength and good impact resistance. The backbone ether linkages and pendant hydroxyl groups promote wetting and bonding to polar substrates and fillers. The typical phenoxy resin structure is shown in Figure 1. The structure of the phenoxy resin is a polyhydroxyether with terminal alphaglycol groups. Weight-average molecular weights range from approximately 25,000 to above 60,000, with n ranging from 30 to above 60. This long chain linear polyhydroxylether structure allows for excellent adhesion, impact and abrasion resistance, flexibility, and chemical resistance in coating applications. Phenoxy resins are soluble in a variety of materials, including ketones, glycol ethers, and glycol ether esters. This article discusses the use of a phenoxy solvent solution, in a solventborne zinc-rich primer formulation. A performance comparison with a commercially available zinc-rich primer will also be discussed, specifically comparing adhesion, dry time, hardness, impact resistance, and salt spray corrosion resistance. Note de contenu : - RAW MATERIALS AND TESTING PANEL PREPARATION - TESTING PROCEDURE : Dry time - Cross-hatch adhesion - König hardness - Mandrel bend flexibility - Impact resistance - Fig. 1 : Phenoxy resin structure - Table 1 : Physical properties of the control - Table 2 : Physical properties of the phenoxy resin PKA - Table 3 : Waterborne phenoxy-modified in 2K waterborne zinc-rich primer formula : a. Epoxy resin component - b. Curing agent component En ligne : https://drive.google.com/file/d/1HRUD5_KJug_0FmEN6WqqQhyWagavtJBq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39425 [article]

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