Effect of ink transfer on print mottle in shrink films / Akshay V. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 1 (01/2015) . - p. 205-213 Titre : Effect of ink transfer on print mottle in shrink films Type de document : texte imprimé Auteurs : Akshay V. Joshi, Auteur ; Swati Bandyopadhyay, Auteur Année de publication : 2015 Article en page(s) : p. 205-213 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire). Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia) Films rétractables Impression jet d'encre Marbrures (défauts) Plan d'expérience Polyéthylène téréphtalate glycol Rotogravure Index. décimale : 667.9 Revêtements et enduits Résumé : The gravure printing process is considered a pioneer in long run package printing jobs, offering exceptional print quality teamed with high quantities. Shrink films, primarily polyvinyl chloride (PVC) and polyethylene terephthalate-glycol modified (PET-G) are extensively printed using the rotogravure printing process. The intricacies of the printing process and the complex nature of the interactions between the substrate, ink, and printing press, if not studied and controlled, can contribute to unnecessary variation and degradation in print quality. Printability not only can be approximated in the dimensions of densitometry and spectrophotometry, but can also be gauged by print defects such as mottle. This study investigates the effect of process parameters, viz., line screen, ink viscosity, printing speed, and impression roller hardness on print mottle, and explores a way to minimize the same. Design of experiments were generated and analyzed through analysis of variance, main and interaction effects. Furthermore, a regression model was generated to predict the print mottle. The predicted values from the model were in close agreement with the press results. The optimization of process parameters resulted in reduction of print mottle in solid printed areas by 34% and 51% on PET-G and PVC, respectively. Note de contenu : - EXPERIMENT : Materials - Surface energy of substrates - Experimental process - Methods of data gathering - Experimental design - RESULTS AND DISCUSSION : Baseline for print mottle - Print mottle DOI : 10.1007/s11998-014-9628-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9628-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23219 [article]

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Roll-to-roll gravure printing of thick-film silver electrode micropatterns for flexible printed circuit board / Kee-Hyun Shin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 95-106 Titre : Roll-to-roll gravure printing of thick-film silver electrode micropatterns for flexible printed circuit board Type de document : texte imprimé Auteurs : Kee-Hyun Shin, Auteur ; Ho Anh Duc Nguyen, Auteur ; Janghoon Park, Auteur ; Dongjun Shin, Auteur ; Dongjin Lee, Auteur Année de publication : 2017 Article en page(s) : p. 95-106 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argent Couches minces Electrodes Electronique imprimée Encre d'imprimerie Polyimides Rotogravure Index. décimale : 667.9 Revêtements et enduits Résumé : This paper presents a novel method for printing thick silver electrodes with high fidelity using a rotogravure technique and high-viscosity silver ink. The widths and thicknesses of the printed electrodes were investigated with respect to the printing angle and printing speed. In addition, the use of a low-surface-energy polyethylene terephthalate substrate was found to decrease the ink transfer for printing angles of up to 60°, possibly because of the small adhesive force at the interface between the ink and substrate. We therefore employed substrates with higher surface energies, namely polyimide and treated polyimide, to enhance the ink transfer. A lower printing speed of 0.5 m/min and high viscosity of 15 Pa·s are required to obtain better functionality with a lower resistivity. However, using the proposed method, the fidelities of the printed patterns were achieved even with a high printing speed of 10.5 m/min using the high viscosity of 15 Pa·s, necessitating a subsequent sintering process. Therefore, the printed pattern was sintered in an oven at 350°C for 10 min. Patterned silver electrodes 1 m in length, 121 ± 2.2 μm in line width, 6.5 ± 2.2 μm in average thickness, and with a resultant resistivity of 9 µΩ·cm were achieved. The findings of this study confirm the potential of rotogravure printing for fabricating thick electrodes with high fidelity for flexible printed circuit boards with large areas. DOI : 10.1007/s11998-016-9844-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9844-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27792 [article]

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Rotogravure printing on leather / Jordan Katzarov in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975) . - p. 149-161 Titre : Rotogravure printing on leather Type de document : texte imprimé Auteurs : Jordan Katzarov, Auteur Année de publication : 1975 Article en page(s) : p. 149-161 Langues : Américain (ame) Catégories : Cuir -- Décoration Impression sur cuir Rotogravure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The art of finishing or decorating leather in one form or another has been practiced for countless centuries. As far back as the records go man has treated his tanned skins and hides with many kinds of materials, first to make them more durable, and later to make them more decorative and attractive. In the fashion-conscious world today different and unusual effects on leathers are very much in vogue and in demand, and these effects have been created and carried out in the tanneries in many ways. Some of the methods are laborious, costly, and slow, but nevertheless have been practiced extensively because it was necessary to satisfy the demand for leathers finished with these effects. For example, the stained goat look is made hy a wash-off process on embossed kid grain, while the inlay effect is accomplished either by the wash-off or flow-in techniques on embossed grains such as the Crusho Kid print. Antique appearances have been created hy ecrase spraying wrinkled or crunched leathers. The "blotchy aniline" effect is produced hy a special spraying set-up. There is the antique "worn" look ‘vhich is produced by dry-milling, and the brush-off appearance which is made in the shoe f actory. There are many other techniques with innumerable variations used to embellish leathers, but it is beyond the scope of this paper to deal with such procedures in detail. Rather, we are con¬cerned with the "fashion finishing" of leathers hy rapid tannery production methods, yielding uniform reproducible results. En ligne : https://drive.google.com/file/d/1xUzCNkhUA78Q4QlFh21aJaO7yrT0WlPK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38783 [article]

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