Polyvinyl alcohol type resin, monolayer film and laminate

Details Polyvinyl alcohol type resin, monolayer film and laminate Polyvinyl alcohol type resin, monolayer film and laminate

2007-02-21

2010-11-23

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S280000, C526S281000

Reexamination Certificate

active

07838609

ABSTRACT:
A polyvinyl alcohol type resin, which renders possible preparation of a packaging material having high gas barrier property under a high humidity condition even as a monolayer film, is provided. The polyvinyl alcohol (PVA) type resin of the invention has at least a PVA structural unit and also has an alicyclic structural unit in the main chain. A monolayer film containing this PVA type resin and a laminate containing at least one layer comprising this PVA type resin can be used as a packaging material which shows high gas barrier property even under a high humidity condition.

REFERENCES:
patent: 6686429 (2004-02-01), Dammel et al.
patent: 9-127643 (1997-05-01), None
patent: 2004-529245 (2004-09-01), None
patent: 2005-536600 (2005-12-01), None
Toyoshima, “Polyvinyl Alcohol”, Ed. by C.A. Finch, John Wiley & Sons, 1973, pp. 339-389.
Iwanami, et al., “Ethylene vinyl alcohol resins for gas-barrier material”, Tappi Jornal, vol. 66, No. 10, Oct. 1983, pp. 85-90.

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