Thermoforming propylene polymer laminated sheet

Details Thermoforming propylene polymer laminated sheet Thermoforming propylene polymer laminated sheet

1984-07-23

1986-01-28

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428 35, 428500, 428516, B32B 702

Patent

active

045670897

ABSTRACT:
A propylene polymer laminated sheet is described, comprising at least two layers wherein at least one surface layer is Layer A comprising 95% by weight or more of a specific crystalline propylene polymer and up to 5% by weight of an inorganic or organic nucleating agent, the thickness of Layer A being from 0.5 to 45% of the total thickness of the sheet, and at least one other layer is Layer B comprising from 40 to 95 parts by weight of a resin component and from 60 to 5 parts by weight of an inorganic filler, the resin component comprising from 5 to 85% by weight of a specific crystalline propylene polymer and from 95 to 15% by weight of an ethylene polymer, the thickness of Layer B being from 55 to 99.5% of the total thickness of the sheet. This sheet has excellent deep drawing properties and can produce a product having excellent surface gloss, appearance and impact resistance.

REFERENCES:
patent: 3773741 (1973-11-01), Berta
patent: 4120844 (1978-10-01), Meyer et al.
patent: 4339496 (1982-07-01), Weiner
patent: 4384024 (1983-05-01), Mitchell et al.
patent: 4414261 (1983-11-01), Nanbu

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