Stock material or miscellaneous articles – Structurally defined web or sheet – Including grain – strips – or filamentary elements in...
Patent
1980-01-14
1982-04-06
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including grain, strips, or filamentary elements in...
428109, 428110, 428240, 428242, 428244, 428246, 428247, 428402, B32B 2712, B32B 2720
Patent
active
043236138
ABSTRACT:
A substantially light-impervious laminate material is provided. In one embodiment, the material includes a first relatively light-reflective (white) polyvinyl chloride sheet, an open scrim sheet, a second relatively light-reflective (white) polyvinyl chloride sheet, and a relatively light-absorbtive (black) bonding agent permeating the scrim sheet and binding together the first sheet, the second sheet and the scrim sheet. Preferably this bonding agent contains aluminum pigment and carbon black pigment.
A method of continuously making this laminate material is also provided. The laminate is made by twice coating the underside of the top laminate sheet with the bonding agent, pressing the scrim sheet against the bonding agent and top sheet underside, stripping the scrim sheet from the top sheet underside, and re-pressing the scrim sheet against the top sheet underside. Next, the top sheet, bonding agent and scrim sheet are heated, and a hot bottom sheet is pressed against the hot scrim sheet. The laminate is then cooled. The finished product can be produced at relatively low cost, yet the occurrence of "pinholes", "slits" and other imperfections is discouraged.
REFERENCES:
patent: 2281635 (1942-05-01), Strauss
patent: 2642404 (1953-06-01), Pike
patent: 2742391 (1956-04-01), Ways
patent: 3222237 (1965-12-01), McHelvy
patent: 3647607 (1972-03-01), Hillers
patent: 4103053 (1978-07-01), Barchas
patent: 4110497 (1978-08-01), Hoel
patent: 4124431 (1978-11-01), Schramer et al.
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