Thermoplastic film from polyethylene having improved surface adh

Details Thermoplastic film from polyethylene having improved surface adh Thermoplastic film from polyethylene having improved surface adh

1990-07-02

1994-11-15

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

15624411, 15624412, 15624422, 1563096, 1563099, 264171, 428332, 428517, 428519, 428521, B32B 516

Patent

active

053646959

ABSTRACT:
A trilayer thermoplastic film and method of making the same composed of an outer layer, a core layer, and an inner layer. The outer layer is made essentially from a mixture of high density polyethylenes, inorganic lamellar filler, and polycaprolactone. The incorporation of polycaprolactone into the outer layer gives the invention its primary advantage since the polycaprolactone gives the outer surface of the envelope the ability to bond with standard adhesives found in the gum on the back of postage stamps and address labels. The core layer is composed essentially of low density polyethylenes and inorganic lamellar filler. The inner layer is composed essentially of high density polyethylenes and inorganic lamellar filler.

REFERENCES:
patent: 4082880 (1978-04-01), Zboril
patent: 4663216 (1987-05-01), Toyoda et al.
patent: 4999335 (1991-03-01), Mruk et al.

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