Coating weight reduction by a carrier layer for tensioned-web slot coating.(Report): An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0030XRSPO
ISBN-13978B0030XRSP9
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on September 1, 2009. The length of the article is 5116 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: The feasibility of using a dilute bottom carrier layer to reduce the thickness of a viscous top layer for tensioned-web slot coating was examined experimentally. Aqueous poly(vinyl) alcohol solutions were prepared for both the carrier and the top layers. The solutions were coated on poly(ethylene terephthalate) films for observation. The thickness ratio of the two layers has to be in a certain range for stable coating, otherwise different types of coating defects would appear. The effects of viscosity, wrapping angle, surface tension, and web tension were studied. It was found that the viscosity ratio of the top layer to the carrier layer is the most critical factor; a large ratio is more helpful in reducing the thickness of the top layer. Increasing the wrapping angle, web tension, and surface tension of the top layer can also decrease the coating thickness of the top layer. The drying load is reduced substantially owing to the significant reduction of the top layer thickness. It was estimated that 50-90% of the energy required for drying could be saved by introducing a carrier layer in this study. POLYM. ENG. SCI., 49:1784-1792, 2009. [c]2009 Society of Plastics Engineers
Citation Details
Title: Coating weight reduction by a carrier layer for tensioned-web slot coating.(Report)
Author: Han-Chih Tsai
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: September 1, 2009
Publisher: Society of Plastics Engineers, Inc.
Volume: 49 Issue: 9 Page: 1784(9)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: The feasibility of using a dilute bottom carrier layer to reduce the thickness of a viscous top layer for tensioned-web slot coating was examined experimentally. Aqueous poly(vinyl) alcohol solutions were prepared for both the carrier and the top layers. The solutions were coated on poly(ethylene terephthalate) films for observation. The thickness ratio of the two layers has to be in a certain range for stable coating, otherwise different types of coating defects would appear. The effects of viscosity, wrapping angle, surface tension, and web tension were studied. It was found that the viscosity ratio of the top layer to the carrier layer is the most critical factor; a large ratio is more helpful in reducing the thickness of the top layer. Increasing the wrapping angle, web tension, and surface tension of the top layer can also decrease the coating thickness of the top layer. The drying load is reduced substantially owing to the significant reduction of the top layer thickness. It was estimated that 50-90% of the energy required for drying could be saved by introducing a carrier layer in this study. POLYM. ENG. SCI., 49:1784-1792, 2009. [c]2009 Society of Plastics Engineers
Citation Details
Title: Coating weight reduction by a carrier layer for tensioned-web slot coating.(Report)
Author: Han-Chih Tsai
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: September 1, 2009
Publisher: Society of Plastics Engineers, Inc.
Volume: 49 Issue: 9 Page: 1784(9)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
