Jpn. J. Appl. Phys. 42 (2003) pp. 5722-5725  |Next Article|  |Table of Contents|
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Thin Film Formation by Direct Reverse Roll-Coating on Plastic Web

Kazuhiro Noda, Masafumi Yamagami, Masanori Yamamoto, Hirotoshi Sato, Hisao Itaya, Atsushi Okajima¹ and Minoru Yamada¹

(Received October 7, 2002; accepted for publication May 2, 2003)

The formation process of thin films on plastic webs by a Newtonian fluid was examined for the direct reverse roll-coating (D-RRC) system. An applicator roll having concavities arrayed with an interval of 0.2 mm on the surface was used for the coating. The thickness of coated films was determined as a function of speed ratio r_s(=v_f/v_r), where v_r is the running speed of the applicator roll and v_f is that of the web in the range of 0.02≤r_s≤1.8. It was found that the thickness of the coating film was increased markedly with the ratio r_s in the range of 0.02≤r_s<0.5 and gradually approached a constant value in the range of 0.5<r_s. These experimental results fitted well with theoretically calculated results based on the lubrication theory.

URL: http://jjap.jsap.jp/link?JJAP/42/5722/
DOI: 10.1143/JJAP.42.5722

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