Pattern coating of thick film pressure sensitive adhesives

Details Pattern coating of thick film pressure sensitive adhesives Pattern coating of thick film pressure sensitive adhesives

1997-04-17

1998-06-30

Bell, Janyce

Coating processes

Coating remains adhesive or is intended to be made adhesive

Pressure sensitive adhesive

427177, 427286, 4273855, 427420, 427552, 427558, B05D 510

Patent

active

057730806

ABSTRACT:
The invention encompasses the pattern coating of a thick layer of adhesive on a single substrate. The adhesive strips may be continuous or discontinuous on the single substrate. In one preferred embodiment of the invention, the substrate is a release liner and the adhesive is a hot melt, thereby not requiring the use of an extruder in the application of the adhesive onto the substrate. When it is desired to produce a non-foamed product, the web is chilled on a chilled drum. Elimination of this chilling step, results in the formation of a foamed tape product, due to the evaporation of the moisture which is typically contained within the silicone-coated paper web. The product is a thick (10-100 mils), free (no carrier) film of adhesive made to the desired width (3/8" to approximately 6") of a high cohesive strength adhesive, with good temperature resistance (>196.degree. F.), with low bubble content (appears clear), wound into rolls containing from 100-800 feet or greater in length.

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