Polymeric die-cuttable lidding materials

Details Polymeric die-cuttable lidding materials Polymeric die-cuttable lidding materials

1993-05-21

1994-08-30

Zirker, Daniel R.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428349, 4283155, 4283157, 4283159, 4283179, 428483, 428516, B32B 326, B32B 702, B32B 712

Patent

active

053426843

ABSTRACT:
An all polymeric, die cuttable symmetrical lidding laminate for a container which is heat sealable to and peelable from the container. In one embodiment, the laminate structure comprises a core layer of a biaxially oriented voided polypropylene film to the opposite sides of which first and second outer layers of a nonvoid-bearing biaxially oriented polyester film are adhesively laminated to form a symmetrical or balanced laminate structure. A heat seal layer or coating is applied to one side of the laminate structure. A static charge dissipating layer or coating is applied to the other side of the laminate structure. The laminate has sufficient stiffness to be readily die cuttable, has excellent lay flat characteristics, remains substantially curl-free when exposed to heat from either side and is readily denested from a stack of lids during package processing.

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