B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
117/90
B32B 27/08 (2006.01) B29C 33/62 (2006.01) B29C 33/68 (2006.01) B29C 59/10 (2006.01) H05K 3/02 (2006.01) H05K 3/46 (2006.01)
Patent
CA 1230526
ABSTRACT OF THE DISCLOSURE The specification describes a mold release sheet structure used in medium and high pressure laminate molding comprising a polyester, nylon or cellulose acetate film and a layer or coating of release resin material on at least one side of the film. Preferably, both sides of the film are coated to form a three (3) layered sheet structure The film is first chemically, mechanically or electrically (corona discharge) treated on one or more sides to improve adhesion of the coated release material which material has the characteristic of readily releasing from (1) the surface of the laminated structures including clad and unclad surfaces; (2) the metal molding equipment and (3) any other mold-assisting sheet or layer used in the molding operation. Laminated structures in- clude laminate components which components are used to, in turn, fabricate multilayer laminates such as printed circuit boards and other laminates. The invention is also directed to the method of manufacture of the release sheet structure.
469195
Tripp Edwin P. III
Wilheim Martin J.
Macrae & Co.
Wilheim Martin J.
LandOfFree
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