Drying method and device for coated layer

Details Drying method and device for coated layer Drying method and device for coated layer

1991-11-15

1993-11-16

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 39, 34 68, 34 1X, 427542, F26B 334

Patent

active

052611655

ABSTRACT:
A drying method and a device employs each apply to a substrate having a coated layer thereon, a first infrared radiation which has a high transmissivity relatively to the coated layer and a high absorptivity relative to the substrate, and a second infrared radiation which has a high absorptivity relative to the coated layer. The first infrared radiation is applied to the coated layer on the substrate and the second infrared radiation is subsequently applied. The energy transmitted through the coated layer is absorbed in the substrate and changed into heating energy to heat the substrate surface. Solvents in the coated layer are evaporated due to the heat passing from the heated substrate surface to the back surface of the coated layer. The energy absorbed by the coated layer accelerates the hardening of the coated layer. A combination of these two types of infrared radiation prevents 1) the coated layer from being heated irregularly and 2) the generation of pin holes in the heated layer, and also shortens the drying period.

REFERENCES:
patent: 2989418 (1961-06-01), Harbaugh
patent: 3265525 (1966-08-01), Lichte
patent: 4293508 (1981-10-01), Heirbaut et al.
patent: 4390564 (1983-06-01), Kimble
patent: 4535548 (1985-08-01), Hyde
patent: 4863375 (1989-09-01), Wu
"Coating Technique", Oct. 20, 1990, published by K. K. Rikoh Shuppan (Science and Technology Company Inc.), pp. 211-213.

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