Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1986-09-09
1988-07-19
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264138, 264171, 2642106, 264211, 2642358, 2642888, 428323, 428330, 428331, 428343, 428349, 428516, 523171, 524492, 524493, 524497, 524584, 524586, 524847, 524849, B29C 4706, B32B 2708, B32B 3130
Patent
active
047583967
ABSTRACT:
A process for the preparation of a biaxially stretch-oriented film having at least one opaque layer is described. The opaque layer is composed essentially of propylene polymer and fillers in a quantity of about 10 to 40% by weight, relative to the total weight of propylene polymer and fillers. In production, the granules are melted in a screw extruder, are forced through a die and are formed by cooling to give a preformed film. The preformed film is then stretch-oriented both along the machine direction and transversely perpendicular to the machine direction and is then heat-set. The fillers are added in the form of a masterbatch to the granules of unfilled polymers. The masterbatch should have a filler content of more than about 30% by weight.
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Bothe Lothar
Crass Guenther
Peiffer Herbert
Schloegl Gunter
Hoechst Aktiengesellschaft
Tentoni Leo B.
Thurlow Jeffery
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