Comparison of textile print quality between inkjet and screen printings / S. Kiatkamjornwong in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B1 (03/2005)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B1 (03/2005) . - p. 25-34 Titre : Comparison of textile print quality between inkjet and screen printings Type de document : texte imprimé Auteurs : S. Kiatkamjornwong, Auteur ; H. Noguchi, Auteur ; P. Putthimai, Auteur Année de publication : 2005 Article en page(s) : p. 25-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Encre en phase aqueuse Impression jet d'encre Impression sur étoffes Liants Pigments Polyacrylates Rhéologie Sérigraphie Index. décimale : 667.9 Revêtements et enduits Résumé : This research was concerned with an investigation of cotton print qualities that were achieved by inkjet printing and screen printing. The acrylic binder, S-711, with a pigment-to-binder (P/B) ratio of 1:2 (by weight) was used to produce one set of inkjet inks. BR-700 was used in the creation of another set of screen inks. Furne silica was added to the screen ink to increase the viscosity so that the ink would meet the rheology requirements. The viscosity and flow behaviour of both inks were acceptable. Both the ink viscosity and the particle-size distribution were slightly increased during storage at an ambient temperature for two months. The inkjet ink printed tabrics were pretreated with a solution of poly(ethylene oxide) having 2 to 3 million Dalton molecular weight. The printed fabrics from both inks were analysed for colour saturation, colour gamut and their volume, density, tone reproduction, stiffness, air permeability, and crock fastness. The type, concentration and P/B ratio were exactly the same in both inks in the pigment dispersions. Even though the loaded ink volume on fabrics, by inkjet, was tuned to be approximately the same in optical density as that given by the screen ink, by a multipass mode printing, both printed fabrics gave different colour saturations, colour gamuts and tone reproductions. The colour gamut volume, stiffness, air permeability and crock fastness of the inkjet inks are superior to those of screen inks. The print quality of the inkjet printing on cotton fabric was, thus, better. However, the inkjet ink printed cotton fabric needed to be printed three times to produce the same colour and tone reproduction as that produced by screen printing. Note de contenu : - EXPERIMENTAL : Preparation of non-treated cotton fabric - Preparation of pretreated cotton fabric - PREPARATION OF AQUEOUS-BASED PIGMENTED INKS : Inkjet ink - Screen ink - Inkjet printing - Screen printing - Characteristics of binders - Characterisation of printed cotton fabric - Colour measurement - RESULTS AND DISCUSSION : Characterisation of binders and inks - Rheological perspective of inkjet ink - Rheological perspective of the screen inks - Print quality - Colour values - Tone reproduction and ink density - PRINTED FABRIC PROPERTIES : Stiffness - Air permeability properties - Crock fastness - COMPARISON OF INKJET INKS AND SCREEN PRINTING INKS ON COTTON : Effect of fabric pretreatment on the colour gamut and the tone reproduction - Effect of the ink deposition on colour - Effect of ink deposition on the printed fabric stiffness and crock fastness - Table 1 : Colour gamut volume of inkjet ink and screen ink - Table 2 : Colour saturation of inkjet ink and screen ink - Table 3 : Dry and wet crock fastness of the inkjet ink and screen ink printed cotton fabrics DOI : 10.1007/BF02699704 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699704.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5433 [article]

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Effect of epoxy resin-silane on physical properties of coated films on steel surfaces / S. Kiatkamjornwong in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B3 (09/2004) . - p. 149-157 Titre : Effect of epoxy resin-silane on physical properties of coated films on steel surfaces Type de document : texte imprimé Auteurs : S. Kiatkamjornwong, Auteur ; W. Yusabai, Auteur Année de publication : 2004 Article en page(s) : p. 149-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epoxydes Métaux -- Revêtements protecteurs Réaction de couplage Résistance thermique Revêtements -- Propriétés mécaniques Revêtements organiques Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Physical and mechanical properties of epoxy resin-based coatings were improved using either a combination of a silane coupling agent aminoethylaminopropyltrimethoxysilane (AEAPS) and an epoxy resin, or an epoxy resin alone. An epoxy resin, with added AEAPS at the concentration of 1 or 3wt% at a film thickness of 25 to 100µm, showed better adhesion on steel surfaces than the epoxy resin alone. The epoxy resin, cured with an AEAPS concentration of 7wt% at a film thickness of 100µm, could withstand heat at 300°C for 20 minutes. The heat-resistance result was measured in terms of colour difference (ΔE) by a colorimetric method, from which the maximum ΔE between the coated film with the epoxy resin-AEAPS and the epoxy resin alone was 3.4. The heat resistance of coated films of epoxy resin-AEAPS tested by thermo-gravimetric analysis showed that the heat resistance increased with increasing AEAPS concentration. The Si-O-Si cross-linking position, found by Fourier transform infrared spectroscopy (FTIR), confirmed its effect on heat endurance and corrosion prevention. The authors found that the use of AEAPS of 7wt% for a 100µm film could prevent the occurrence of corrosion under a 1000-hour salt-spray exposure. The corrosion rate was found to be 0.39 mil (9.9µm) per year. The flooring with AEAPS addition to the epoxy resin was better than that with cycloaliphatic amine. The addition of AEAPS of 15.5wt% improved the film mechanical properties, hardness, compressive strength and chemical resistance in comparison with the neat epoxy resin or the combination of AEAPS and cycloaliphatic amine. Note de contenu : - EXPERIMENTAL : Epoxy resin coating on steel surface - Epoxy resin flooring on steel surface - CHARACTERISATION AND TESTING : Epoxy resin-based coating - RESULTS AND DISCUSSION : Evaluation of epoxy-coated film by colorimetry - Thermal properties of the cured films - Effect of silane content on the adhesion of the epoxy coating - Effect of silane content in the epoxy-based coating on corrosion resistance - Effect of silane content on the mechanical properties of the epoxy-based flooring - Table 1 : Epoxy coating composition - Table 2 : Epoxy flooring composition - Table 3 : Colour difference (ΔE) of the colour changes in the epoxy/AEAPS coating at different AEAPS (wt%) concentrations caused by heat exposure at various film thicknesses - Table 4 : Ahesive tape test on epoxy/silane coated film - Table 5 : Effect of salt-spray exposure time and coating thicknesss on cut usting and surface appearance - Table 6 : Hardness of epoxy/AEAPS flooring DOI : 10.1007/BF02699629 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699629.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5452 [article]

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Inkjet printing : effects of binder particle size and chitosan pretreatment on the qualities of silk fabric / W. Kangwansupamonkon in SURFACE COATINGS INTERNATIONAL, Vol. 94, 6 (12/2011)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 94, 6 (12/2011) . - p. 216-225 Titre : Inkjet printing : effects of binder particle size and chitosan pretreatment on the qualities of silk fabric Type de document : texte imprimé Auteurs : W. Kangwansupamonkon, Auteur ; M. Suknithipol, Auteur ; S. Phattanarudee, Auteur ; S. Kiatkamjornwong, Auteur Année de publication : 2011 Article en page(s) : p. 216-225 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chitosane Le chitosane ou chitosan est un polyoside composé de la distribution aléatoire de D-glucosamine liée en ß-(1-4) (unité désacétylée) et de N-acétyl-D-glucosamine (unité acétylée). Il est produit par désacétylation chimique (en milieu alcalin) ou enzymatique de la chitine, le composant de l'exosquelette des arthropodes (crustacés) ou de l'endosquelette des céphalopodes (calmars...) ou encore de la paroi des champignons. Cette matière première est déminéralisée par traitement à l'acide chlorhydrique, puis déprotéinée en présence de soude ou de potasse et enfin décolorée grâce à un agent oxydant. Le degré d'acétylation (DA) est le pourcentage d'unités acétylées par rapport au nombre d'unités totales, il peut être déterminé par spectroscopie infrarouge à transformée de Fourier (IR-TF) ou par un titrage par une base forte. La frontière entre chitosane et chitine correspond à un DA de 50 % : en deçà le composé est nommé chitosane, au-delà, chitine. Le chitosane est soluble en milieu acide contrairement à la chitine qui est insoluble. Il est important de faire la distinction entre le degré d'acétylation (DA) et le degré de déacétylation (DD). L'un étant l'inverse de l'autre c'est-à-dire que du chitosane ayant un DD de 85 %, possède 15 % de groupements acétyles et 85 % de groupements amines sur ses chaînes. Le chitosane est biodégradable et biocompatible (notamment hémocompatible). Il est également bactériostatique et fongistatique. Le chitosane est également utilisé pour le traitement des eaux usées par filtration ainsi que dans divers domaines comme la cosmétique, la diététique et la médecine. Encre jet d'encre Impression jet d'encre Impression sur étoffes Liants Soie et constituants Taille des particules Index. décimale : 667.5 Encres d'imprimerie Résumé : Inkjet inks for fabric printing usually contain either a dye or a pigment as colourants. The most important requirement of pigmented inks is the pigment dispersion stability and performance over a wide range of conditions, temperatures and times. The binder of an inkjet ink may contain one or more polymer types to control the viscosity of the ink system, to promote droplet formation, and to serv as a binder for the colourant, providing adhesion to the printing surface by the formation of a localised film. The development of a truly effective binder that is suitable for inkjet inks sill remains a great challenge due to the the strict requirements of particle size, size distribution, surface tension, viscosity, stability, compatibility with other components of the inks, and the printing system. There also needs to be controlled drop formation, jetting and fabric wettability. In this light, nanoscale binders appear as likely candidates for pigment-based inkjet ink printing on fabrics. Indeed, inks containing nano-sized binders and commercial pigment dispersions have previously been demonstrated to give excellent printability, good colour fastness and softness of the printed fabrics. Note de contenu : - MATERIALS AND METHODS : Materails - Preparation of pigmented inks - Characterisation of pigmented inks - Preparation of the silk fabrics - Chitosan solution pretreatment - Printing process - Evaluation of printed quality (colour gamut - colour bleeding and outline sharpness - optical density - ink penetration - crock fastness - wash fastness testing - stifness testing - air permeability) - RESULTS AND DISCUSSION : Ink property - EFFECTS OF INK BINDER PARTICLE SIZE, PIGMENT-TO-BINDER RATIO AND CHITOSAN PRETREATMENT ON PRINT PERFORMANCE : Ink penetration (optical density - colour gamut, inter-colour bleeding and outline sharpness of prints) - Effects of binder size and binder-to-pigment ratio on the properties of the printed fabrics (crock fastness - wash fastness - fabric stiffness - air permeability) En ligne : https://drive.google.com/file/d/1wAC-c-hDR1C41ceQPw2M0LOug9JrMRrQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12900 [article]

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