Method of applying a hot melt coating

Details Method of applying a hot melt coating Method of applying a hot melt coating

1995-10-26

1998-05-05

Pianalto, Bernard

Coating processes

Coating remains adhesive or is intended to be made adhesive

Pressure sensitive adhesive

4272088, 4274071, 427420, 427428, B05D 510

Patent

active

057471070

ABSTRACT:
A method of applying a coating of hot melt polymeric material from a die to a substrate. Hot melt polymeric material is extruded through the die onto the peripheral surface of a rotating application roller to provide a coating layer along that peripheral surface. A substrate is conveyed past the peripheral surface of the application roller at an application interface to cause transfer of the first coating layer to the substrate and shearing and thinning of the coating layer because the substrate is conveyed faster than the peripheral speed of the application roller. The velocity of the peripheral surface and spacing between the die and the application interface along are selected to provide a time interval of at least 0.12 second for movement of portions of the coating layer from the die to the application interface, thereby affording relaxation and molecular reorientation of the hot melt polymeric material after the extruding step to facilitate shearing of the first coating layer at the application interface without causing ribbing or breaking of the coating layer.

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