Peelably sealed plastic packages and method of preparing same

Details Peelably sealed plastic packages and method of preparing same Peelably sealed plastic packages and method of preparing same

1988-08-01

1991-11-05

Gehman, Bryon P.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

156334, 206484, 220359, 22912535, B65D 134

Patent

active

050625691

ABSTRACT:
A polypropylene container is disclosed which is hermetically sealed with a complementary lid extending across the open container the opposed faces of the container surface and the lid being bonded together by a peelable, heat seal layer intermediate between the opposed faces. The heat seal layer is comprised of a mixture of a particulate filler and an olefin polymer blend comprised of a homogeneous mixture of an olefin homopolymer, a highly crystalline propylene-ethylene block copolymer and an elastomeric ethylene-propylene copolymer.

REFERENCES:
patent: 4533602 (1985-08-01), Nakamura et al.
patent: 4689099 (1987-08-01), Ito et al.
patent: 4771935 (1988-09-01), Hekal

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