Method and means for drying coatings on heat sensitive materials

Details Method and means for drying coatings on heat sensitive materials Method and means for drying coatings on heat sensitive materials

1982-10-25

1985-08-20

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 13, 34 39, 34 66, 34 68, 118642, 118643, 427 55, 4272082, 4273743, F26B 330

Patent

active

045355487

ABSTRACT:
A method and means for drying a thin aqueous-based coating on heat sensitive materials without boiling and without distortion or damage to the heat sensitive material or delicate surface thereof. Solvent-based adhesives are used in the production of articles of manufacture because of the ability to assembly the separate pieces immediately after the spray adhesive is applied. However, certain solvent-based adhesives attack the surface of the item to be covered, and in the case of videodiscs, the solvent in the adhesive may well contaminate the plastic surfaces or even the aluminum reflective layer of a laser disc. According to the present invention, a water based coating applied to a sensitive material is subjected to alternate sources of radiant heat energy and relatively cool air. The time of exposure to each source and the amounts of heating and cooling of the respective sources are maintained at levels sufficient to significantly decrease the time needed to dry the coating while limiting the temperature increase of the material to a level insufficient to deform or distort the material or surfaces thereof.

REFERENCES:
patent: 3900959 (1975-08-01), Breschi et al.
patent: 3994073 (1976-11-01), Lackore
patent: 4214015 (1980-07-01), Stephan
patent: 4313190 (1982-01-01), Slaten
patent: 4336279 (1982-06-01), Metzger
patent: 4416068 (1983-11-01), Nilsson et al.

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