Sealable and peelable film structure

Details Sealable and peelable film structure Sealable and peelable film structure

2005-05-24

2005-05-24

Tarazano, D. Lawerence (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S215000, C428S461000, C428S349000, C428S516000, C428S518000, C428S520000, C428S354000, C428S213000, C428S318400

Reexamination Certificate

active

06896956

ABSTRACT:
An opaque, sealable and peelable film, including at least (a) a cavitated first core layer containing a thermoplastic polymer and a cavitating agent, (b) a second core layer containing a peelable blend and (c) one or more outer layers, at least one of which is a sealable outer layer, each independently containing a thermoplastic polymer. The peelable blend of the second core layer (b) may contain (i) from 20-80 wt % of a polyethylene and (ii) from 80-20 wt % of a polyolefin incompatible with polyethylene (i), or it may contain (i) from 10-35 wt % of ethylene-α-olefin elastomer and (ii) from 90-65 wt % of propylene homopolymer.

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