Multilayer barrier film for transdermal drug delivery system and ostomy applications
First Claim
1. An oxygen and moisture impermeable multilayer barrier film having a heat seal strength of at least about 1.0 lb/inch width of said film, said film comprising a barrier layer and at least one heat sealable skin layer, said skin layer comprising a thermoplastic polymer having a 2% secant modulus of less than about 15,000 psi in both the machine and transverse directions, said barrier film exhibiting a noise of less than about 85 dB when subjected to flexing through a 65°
- angle at 0.45 Hz.
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Accused Products
Abstract
An oxygen and moisture impermeable multilayer barrier film is provided including a barrier layer comprising a homopolymer of vinylidene chloride or a copolymer of vinylidene chloride and vinyl chloride or methyl methacrylate. The barrier layer is coextruded with or laminated to at least one heat sealable skin layer comprising a thermoplastic polyurethane, a substantially linear copolymer of ethylene and an α-olefin, or a homogeneously-branched linear olefin resin to form the barrier film. The multilayer film may be used for reusable ostomy bags, for systems for the transdermal delivery of drugs, and for heat sealable bags used in packaging.
56 Citations
15 Claims
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1. An oxygen and moisture impermeable multilayer barrier film having a heat seal strength of at least about 1.0 lb/inch width of said film, said film comprising a barrier layer and at least one heat sealable skin layer, said skin layer comprising a thermoplastic polymer having a 2% secant modulus of less than about 15,000 psi in both the machine and transverse directions, said barrier film exhibiting a noise of less than about 85 dB when subjected to flexing through a 65°
- angle at 0.45 Hz.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification