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US 2014/0194024 A1Published application
Barrier Films
AssigneeAvery Dennison Corporation
InventorsHoang T. Pham, Thomas Laney, Farid F. Ghiam, Kevin O. Henderson
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Abstract
Various polymeric barrier compositions are described which when formed into films, are useful in reducing transmission of odors. The films can be incorporated into a wide range of products such as multilayer barrier films used in medical applications and particularly in ostomy appliances. In certain versions, the films include semi-crystalline cyclic olefin copolymers.
Claims38
A barrier film comprising:
- a semi-crystalline cyclic olefin copolymer (COC) having a melting temperature (Tm) of from about 70° C. to about 100° C., a glass transition temperature (Tg) of from about −20° C. to about 32° C., and a norbornene content of from about 5 mole % to about 25 mole %.
A multilayer barrier film comprising:
- at least one layer including a semi-crystalline cyclic olefin copolymer (COC) having a melting temperature (Tm) of from about 70° C. to about 100° C., a glass transition temperature (Tg) of from about −20° C. to about 32° C., and a norbornene content of from about 5 mole % to about 25 mole %.
A multilayer barrier film comprising:
- a barrier layer including ethylene vinyl alcohol (EVOH);
- at least one flexible support layer including one or more polyolefins;
- an antimicrobial layer including at least one antimicrobial agent;
- and
- at least one layer including a semi-crystalline cyclic olefin copolymer (COC).
2 more elements
A method for reducing transmission of odorous species, the method comprising:
- providing a semi-crystalline cyclic olefin copolymer (COC);
Dependencies are inferred from the claim text.