Process for drying coated web

Details Process for drying coated web Process for drying coated web

1989-11-08

1992-01-07

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 41, 427379, F26B 700

Patent

active

050779125

ABSTRACT:
A process for drying a coated web which comprises drying a continuously traveling web coated with a coating composition containing an organic solvent by hot air up to set to touch, and evaporating the residual solvent in the coated membrane by heating a heating roll. In the process of the invention, since a coated web is first dried by a hot air at a relatively low temperature, such as lower than 150.degree. C., up to set to touch state and then further dried by a heating roll being excellent in heat conductivity, a temperature distribution occurs little in the cross direction. Moreover, the present drying process rarely affects adversely the coated membrane of the web.

REFERENCES:
patent: 2270038 (1942-01-01), Corbin
patent: 3281952 (1966-11-01), Mullaney
patent: 3877418 (1975-04-01), Shaner
patent: 4567673 (1986-02-01), Bohnensieker
patent: 4894927 (1990-01-01), Owaga et al.
patent: 4926567 (1990-05-01), Ogawa

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