21 résultat(s) recherche sur le tag 'film''

Alternate chemistries for film formation / Manoj R. Nair in PAINTINDIA, Vol. L, N° 1 (01/2000)

[article]  inPAINTINDIA > Vol. L, N° 1 (01/2000) . - p. 35 -42 Titre : Alternate chemistries for film formation Type de document : texte imprimé Auteurs : Manoj R. Nair, Auteur ; V. C. Malshe, Auteur Année de publication : 2000 Article en page(s) : p. 35 -42 Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  'Formation  film'  'Réaction  chimique'  'Mécanisme  réaction' Index. décimale : 667.9 Revêtements et enduits Résumé : Film formation plays a crucial role in the coating industry. The conventional methods used involves film formation by evaporation of solvent, chemical reaction or by coalescence. In the present paper an effort is made to search for new chemistries. The reference for this paper are organic reactions which were not earlier used and these reactions were selected based on some guidelines. An effort is also made in terms of applying it to coating field. This paper has tried to put forth new ideas which may or not be applicable in practice with hpes that a step has been taken in proper direction. The chemisties mentioned here are open for suggestions and modifications. Note de contenu : - Coventional curing chemistries - Guidelines for selection of a reaction for film formation - New reported reactions - Recommandations Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12673 [article]

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Effect of electrostatic assist and gravure process parameters on voids and dot skips reduction in shrink PVC film / Akshay V. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 3 (05/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 3 (05/2016) . - p. 527-534 Titre : Effect of electrostatic assist and gravure process parameters on voids and dot skips reduction in shrink PVC film Type de document : texte imprimé Auteurs : Akshay V. Joshi, Auteur Année de publication : 2016 Article en page(s) : p. 527-534 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de polyvinyle Héliogravure Tags : 'Shrink  PVC  film'  Heliogravure  ESA  'Void  area'  'Dot  skips' Index. décimale : 667.9 Revêtements et enduits Résumé : Gravure is the most popular process used to print on shrink films for larger volume runs and high-quality reproduction. Polyvinyl chloride (PVC) holds the major share in shrink application. However, print defects such as voids and dot skips are the major concern while printing on shrink PVC film. The presence of these defects degrades the print quality and causes print rejections. The electrostatic assist (ESA) in gravure is designed to eliminate dot skips; however, the effect of ESA parameters such as air gap and voltage on print defects needs to be explored in depth. Thus, this study aims to minimize print defects by optimization of gravure process parameters. The study investigates the effect of process parameters such as line screen, air gap (distance between charge bar and impression roller), viscosity, voltage and speed on voids and dot skips. A general full factorial was designed and statistical model was developed to determine the influence of each process parameter on defect minimization. The results showed the significance of all the process parameters in reduction of dot skips and void area. The improved ink transfer with ESA resulted in elimination of dot skips and minimization of void area by 96%. Note de contenu : - EXPERIMENTAL : Substrate and ink - Gravure cylinder - Experimental process - Experimental design - Methods of data gathering - RESULTS AND DISCUSSION : Baseline foir voids and dot skips - Hypothesis statement - Statistical analysis for void area/sheet - Regression equation - Dot skips DOI : 10.1007/s11998-015-9774-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9774-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26292 [article]

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Interfacial studies of crosslinked urethanes : part IV. Substrate effect on film formation in polyester waterborne polyurethanes / Marek W. Urban in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 896 (09/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 896 (09/1999) . - p. 73-78 Titre : Interfacial studies of crosslinked urethanes : part IV. Substrate effect on film formation in polyester waterborne polyurethanes Type de document : texte imprimé Auteurs : Marek W. Urban, Auteur ; Claudia L. Allison, Auteur Année de publication : 1999 Article en page(s) : p. 73-78 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau  revêtement'  'Peinture  eau'  émulsion'  'Uréthanne  polymère'  'Formation  film'  Subjectile  'Propriété  surface'  'Tension  superficielle'  'Réaction  interface'  Réticulation  'Etude  expérimentale'  Métal  'Matière  plastique'  Verre Index. décimale : 667.9 Revêtements et enduits Résumé : These studies examine the effect of substrate surface tension on crosslinking reactions in waterborne polyurethanes (PUR) applied to tin-plated steel, steel, polypropylene (PP), thermoplastic olefin (TPO), and glass. The results show that, relative to tin-plated steel, removal of tin-plating from a steel substrate increases isocyanate (NCO) consumption by 42% near the film-substrate (F-S) interface. When PUR is allowed to crosslink on steel, PP, TPO, and glass, the NCO concentration is greater at the film-air (F-A) interface. Furthermore, crosslinking reactions result in a greater amount of urea-hydrogen bonded species near the F-S interface for all substrates. While an increase ofsubstrate surface tension decreases the amount of urea-hydrogen bonded carbonyl groups near the F-S interface, TPO was found to exhibit different behavior due to talc stratification near the surface. In this case, the presence of talc in WB-PUR coatings or thermoplastic substrates decreases the amount of hydrogen-bonded species and increases NCO consumption. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17941 [article]

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Role of particle size on latex deformation during film formation / Charles S. Kan in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 896 (09/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 896 (09/1999) . - p. 89-97 Titre : Role of particle size on latex deformation during film formation Type de document : texte imprimé Auteurs : Charles S. Kan, Auteur Année de publication : 1999 Article en page(s) : p. 89-97 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Peinture  eau'  émulsion'  'Formation  film'  Déformation  'Dimension  particule'  'Température  transition  vitreuse'  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : The ability of latex particles to deform and coalesce to form an integral film upon drying is an important property in many latex coating applications. Many theories have been proposed to account for the origin of the deformation forces. The capillary forces which depend inversely on particle size have been accepted as important for latex deformation and film formation. The minimum film forming temperature (MFFT) has been found to be a function of the particle size of latexes and has been used as evidence that the capillary forces are responsible for film formation. In this study, the deforming force at MFFT has been determined from the moduli of water-equilibrated latex polymers. No particle size dependence was observed. The magnitude of the deforming forces was at least an order of magnitude lower than that predicted by the capillary force theory. Electron microscopy of film formed below the MFFT, a condition that corresponds to early stage film formation, showed significant deformation, indicating that at the beginning of film formation, forces of magnitude predicted by the capillary force theory are present. However, the magnitude of the forces decreases rapidly as film formation progresses. The MFFT particle size dependency can be explained by the difference in the degree of water plasticization. Evidence that latexes of different particle size were plasticized by water to different extents was determined from the Tgs of the latex emulsions. Note de contenu : - EXPERIMENTAL : Materials - Preparation of unseeded latexes - Preparation of seeded latexes - Minimum film formation temperature - Dynamic mechanical spectroscopy - Glass transition temperature of latex emulsion - RESULTS AND DISCUSSION : Effect of particle size on MFFT - Estimation of deformation force in film formation process - Deformation forces in early stage of film formation - effect of latex particle size on the glass transition temperature of latex emulsions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17943 [article]

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The derivation and analysis of a model of the drying process of a paint film / S. K. Wilson in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 4 (04/1997)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 80, N° 4 (04/1997) . - p. 162-167 Titre : The derivation and analysis of a model of the drying process of a paint film Type de document : texte imprimé Auteurs : S. K. Wilson, Auteur Année de publication : 1997 Article en page(s) : p. 162-167 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture  'Formation  film'  Séchage  Feuil  Solvant  Evaporation  Modélisation Index. décimale : 667.9 Revêtements et enduits Résumé : Cet exposé décrit quelques développements récents dans le domaine de l'élaboration des modèles mathématiques du processus de séchage d'un feuil de peinture. On décrit un modèle d'un tel feuil (contenant une résine non volatile et un solvant volatil) et l'on l'utilise afin d'analyser l'évolution de petites perturbations de l'épaisseur du feuil et également de la teneur en solvant. En particulier, cette analyse montre que les effets qu'excerce le gradient de tension superficielle (Morangani) sont suffisants pour expliquer le changement d'une perturbation initiale de l'épaisseur du feuil, aussi bien que l'apparence d'une perturbation dans un feuil qui était plat au début. Note de contenu : - Derivation of the model - Evolution of small disturbances to a drying paint film - Application to water-borne coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17160 [article]

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The origin of film defects caused by electrolyte in electropaints / W. C. Ledger in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 9 (09/1995)

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The role of surfactant on the film formation of latex polymers / P. Nagarajan in PAINTINDIA, Vol. XLVI, N° 2 (02/1996)

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Aqueous polyurethanes - polymer colloids with unusual colloidal, morphological, and application characteristics / R. Satguru in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 830 (03/1994)

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Catalytic curing of industrial OEM coatings - Part I / D. S. Hardas in PAINTINDIA, Vol. XLV, N° 6 (06/1995)

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Drying of alkyd emulsion paints / P. K. Weissenborn in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 906 (07/2000)

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Emulsion polymers : The backbone of waterborne paints / Mamta Kapadia in PAINTINDIA, N° annuel 2002 (2002)  

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Flow properties of fluid systems / A. Davey in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 7 (07/1997)

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Self stratifying coating : A review / Sudip Nath in PAINTINDIA, Vol. LII, N° 10 (10/2002)

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Slot die stripe coating of low viscous fluids / Sebastian M. Raupp in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

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Transparent UV curable fluorinated coatings / David Szum in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/95 (09/1995)

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Water-borne fluoroelastomeric coatings with high barrier properties / T. Poggio in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 7 (07/1995)

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Films formed from polystyrene latex/clay composites : A fluorescence study / Saziye Ugur in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)  

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FIM : une décoration en plein essor in PLASTIQUES & ELASTOMERES MAGAZINE, N° 57-1 (01-02/2005)

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Drying characteristics of low odour alkyd paints / Elizabeth Reck in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/98 (11/1998)  

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Free volume distribution during consolidation and coalescence of latex films / A. J. Hill in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 913 (02/2001)

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Microbial degradation / M. C. Zamponi in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/01 (09/2001)  

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