Multi-layer opaque low density film

Details Multi-layer opaque low density film Multi-layer opaque low density film

1985-09-26

1987-05-05

Kittle, John E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428346, 428336, 428409, B65D 100

Patent

active

046632190

ABSTRACT:
A coextruded multi-layer opaque film which has been biaxially oriented by stretching in the longitudinal direction and transverse direction at selected temperatures and with selected stretch ratios, and a method for producing the film. The film has a base layer of polypropylene or a copolymer thereof, and fillers. Its density is 0.4 to 0.6 g/cm.sup.3, the amount of filler, based on the mixture of polypropylene and filler, is 16 to 30% by weight, and the particles of the filler employed have a mean size of 2 to 5 .mu.m. Because of its reduced tendency to recover after folding, the film is particularly suitable for packaging purposes. One or more surface layers can be applied on either or both sides of the base layer.

REFERENCES:
patent: 3900670 (1975-08-01), Ikeda et al.
patent: 4029615 (1977-06-01), Kamens et al.
patent: 4303708 (1981-12-01), Gebhardt et al.
patent: 4377616 (1983-03-01), Ashcraft et al.
patent: 4413298 (1983-11-01), Pecsok et al.
patent: 4496714 (1985-01-01), Murata et al.
patent: 4560614 (1985-12-01), Park

Affiliated with

Also associated with

Rating

Multi-layer opaque low density film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-layer opaque low density film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer opaque low density film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2399010