Plastic sheet with a surface treated to enhance adhesion and met

Details Plastic sheet with a surface treated to enhance adhesion and met Plastic sheet with a surface treated to enhance adhesion and met

1976-03-01

1977-10-18

Robinson, Ellis

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

264284, 264293, 264299, 281 21R, 281 29, 428179, 428476, 428477, 428478, 428513, B32B 300, B42D 302, B29C 300

Patent

active

040547019

ABSTRACT:
A sheet of thermoplastic material has a planar surface treated to enhance adhesion of paper thereto by means of an adhesive of the class consisting of animal glue and water base adhesives as used in book binding. The sheet is passed beneath a heated diamond knurling roll at a temperature and pressure, and at a rate to produce a dwell time, which are controlled to form in said planar surface a continuous pattern of small, shallow recesses separated by inter-recess planar areas of said surface, and a raised rim of the thermoplastic material bordering each of said recesses and projecting above the planar areas, a large percentage of said rims having at least a part of their outer periphery overhanging a portion of the adjacent inter-recess planar area.

REFERENCES:
patent: 3575764 (1971-04-01), McFarren
patent: 3810812 (1974-05-01), Koenig
patent: 3956450 (1976-05-01), Abe
patent: 3962066 (1976-06-01), Barber

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