Low temperature heat sealable biaxially oriented polypropylene f

Details Low temperature heat sealable biaxially oriented polypropylene f Low temperature heat sealable biaxially oriented polypropylene f

1995-08-03

1998-09-22

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428 357, 428461, 428512, 428516, 156305, 156334, 26417316, 26417319, 2642358, 427536, B32B 2732

Patent

active

058111859

ABSTRACT:
This invention provides a polyolefinic multilayer film which has a base layer containing polypropylene and at least one outer layer. The outer layer contains at least 50% by weight of a propylene/butylene resin composition. The propylene/butylene resin composition has a low degree of crystallinity and is modified by a surface treatment, e.g. corona treatment. The surface treatment raises the minimum heat-sealing temperature to the range of 85.degree. to 110.degree. C. and unexpectedly reduces the film's tendency to block. The resulting multilayer film is useful in packaging.

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patent: 5436041 (1995-07-01), Murschall et al.
patent: 5496600 (1996-03-01), Peiffer et al.

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