Laminates of cloth and filled crystalline polypropylene and a me

Details Laminates of cloth and filled crystalline polypropylene and a me Laminates of cloth and filled crystalline polypropylene and a me

1979-12-17

1981-10-27

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428 96, 428204, 428241, 428243, 428248, 428252, 428282, 428283, 428286, 428310, 428315, 428461, 428516, 428904, 156228, 156324, 156334, B32B 2712, B32B 2720, B32B 2732, B32B 3108

Patent

active

042974089

ABSTRACT:
Laminates comprising cloth (17) or other sheet material bonded to a filled crystalline polypropylene composition (14) by means of an unfilled crystalline polypropylene composition (15), preferably a crystalline random copolymer of propylene and 0.5 to 5.0% of ethylene. The laminates are made by sandwiching preferably a sheet (15) of the unfilled composition between the cloth (17) and filled composition (14) and then heating the sandwich to above the crystalline melting points of the polypropylenes and subsequently cooling to form the laminate. The fillers may be minerals or wood flour, the cloths may be knitted, woven or felted and other sheet materials may be plastics films, metal foils, paper or leather cloth.

REFERENCES:
patent: 3437550 (1969-04-01), Paul
patent: 3607616 (1971-09-01), Barbehenn
patent: 3862869 (1975-01-01), Peterson et al.
patent: 3887745 (1975-06-01), Yoshii et al.
patent: 4046945 (1977-09-01), Baxmann et al.
patent: 4148972 (1979-04-01), Yamane
patent: 4211811 (1980-07-01), Bordini et al.

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