| Titre : |
Blotching in roll coating |
| Type de document : |
texte imprimé |
| Auteurs : |
A. W. Mix, Auteur ; Z. B. Chen, Auteur ; L. M. Johnson, Auteur ; A. Jeffrey Giacomin, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 67-74 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Elastohydrodynamique
Enduction au rouleau
Matières plastiques -- Thermoformage
Résistance aux taches
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
After thermoforming, plastic parts are stacked for shipping, and these parts tend to stick together. Called nesting, sheet stock is often first coated with a silicone compound before thermoforming to prevent this. The coating usually consists of a small amount of lubricant dispersed in a majority of carrier fluid, and this fluid must then dry before reaching the sheet winder or else the coating blotches. This coupling of coating and drying to determine when to expect blotching is examined. Roll coating involves a dimensionless group called the elasticity number that governs the thickness of the coating to be dried. The drying section involves the evaporation of the coating carrier fluid, and then diffusion into the dry surrounding atmosphere. When analyzing the drying, a new dimensionless group that governs blotching is discovered, called blotchability. The result of this analysis allows practitioners to determine which operating conditions cause blotching, and how to eliminate it. Roll coating uses a deflecting rubber roll to apply vanishingly thin coatings (≤1 μm), an interesting elastohydrodynamic problem. |
| Note de contenu : |
- Avoiding applicator flooding
- Metering roll
- Applicator roll
- Avoiding blotching
- Blotching and elasticity number |
| DOI : |
10.1007/s11998-010-9282-1 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9282-1.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10924 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 1 (01/2011) . - p. 67-74
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