Polypropylene films and multilayered laminate

Details Polypropylene films and multilayered laminate Polypropylene films and multilayered laminate

2007-07-31

2007-07-31

Kruer, Kevin R. (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

C428S516000, C428S523000, C526S351000, C526S348000

Reexamination Certificate

active

10110193

ABSTRACT:
Heat-sealing polypropylene films having specific characteristics, and being well-balanced between a tensile modulus and a heat seal temperature, less tacky, and excellent in processability, transparency and impact resistance, as well as being excellent in resistance to whitening due to peeling, softness and impact resistance. A multilayered heat-sealing polyolefin resin laminate having at least one outermost layer produced from the above heat-sealing propylene polymers exhibits excellent low-temperature heat sealability and sufficient interlaminar strength without the use of an adhesive. The heat-sealing propylene polymers are produced by polymerizing propylene or polymerizing propylene with ethylene and/or C4-C20α-olefin in the presence of a polymerization catalyst containing a transition metal compound represented by the following formula (I):wherein A1, A2, E1, E2, M, X, Y, q and r are as defined in the specification.

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