Multilayer halogen-free barrier film for ostomy and transdermal

Details Multilayer halogen-free barrier film for ostomy and transdermal Multilayer halogen-free barrier film for ostomy and transdermal

1994-03-23

1996-10-22

Nold, Charles

Stock material or miscellaneous articles

Hollow or container type article

604332, 604338, 6048901, 6048911, 6048921, 424443, 424444, 424449, B32B 2708

Patent

active

055674895

ABSTRACT:
An oxygen and moisture impermeable multilayer barrier film which is free of halogens and which may be produced by coextrusion or lamination techniques is provided. The film provides excellent adhesion between layers, has quietness, odor barrier, and softness characteristics, and provides a heat sealable surface for the fabrication of bags. The barrier film includes a halogen-free barrier layer and at least one heat sealable skin layer. The heat sealable skin layer includes either a thermoplastic polyurethane, a substantially linear copolymer of ethylene and an .alpha.-olefin having a density in the range of from about 0.87-0.92 gm/cc and from about 0.01 to 3 long chain branches/1000 carbon atoms along the polymer backbone, a homogeneously-branched linear polyolefin resin, or a blend of an ultra low density polyolefin resin with a copolymer of ethylene and vinyl acetate.

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