Process for drying coated web

Details Process for drying coated web Process for drying coated web

1987-12-21

1990-01-23

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 36, 34 41, F26B 332

Patent

active

048949272

ABSTRACT:
A process for drying a moving web coated with a coating composition containing an inflammable organic solvent which comprises, drying said coated web by passing it through a closed-type oven filled with an inert gas and provided with planar heaters on the upper side and lower side of the path of the moving web, and separating said organic solvent from the exhaust gas of said oven by condensation. The process of the invention does not require air for dilution or an incinerator. Moreover, the recycle volume of inert gas is small, and the heat exchanger is compact. Accordingly, the whole apparatus can be made compact. The coated face of web is hardly affected by the movement of the surrounding atmosphere due to the drying by heaters as well as the small volume of inert gas introduced into the oven. Accordingly, a uniformly dried coating can be obtained.

REFERENCES:
patent: 1613073 (1927-01-01), Zimmerli
patent: 4135098 (1979-01-01), Troue
patent: 4240453 (1980-12-01), Vail et al.
patent: 4654980 (1987-04-01), Bhat

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