Coating processes – Coating remains adhesive or is intended to be made adhesive – Pressure sensitive adhesive
Patent
1990-08-13
1991-09-17
Pianalto, Bernard
Coating processes
Coating remains adhesive or is intended to be made adhesive
Pressure sensitive adhesive
156230, 4272088, 427373, 4273855, B05D 510
Patent
active
050494171
ABSTRACT:
A method for producing an air-permeable adhesive tape comprising a substrate and a porous adhesive layer formed on said substrate is provided. The method comprises the steps of: forming a layer of a solution on a substrate, said solution containing an adhesive material in an organic solvent; applying water drops on said layer of said solution while said organic solvent remains in said layer, thereby allowing water drops to sink into said layer, the diameter of said water drops being in the range of 10 to 1000 .mu.m, and the total amount of said water drops applied onto the surface of said layer being 5 to 200 g/m.sup.2 ; evaporating said organic solvent contained in said layer of the solution, thereby forming an adhesive layer that contains said water drops; and evaporating said water from said adhesive layer, thereby forming communicating pores extending from the external surface to the inner surface of said adhesive layer.
Hanatani Nobuo
Tsubota Kenji
Pianalto Bernard
Sekisui Kagaku Kogyo Kabushiki Kaisha
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