Gas barrier film and production process thereof
US5621026A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 5, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a gas barrier film formed from a mixture containing (A) at least one poly(meth)acrylic acid polymer selected from the group consisting of poly(meth)acrylic acid and partially neutralized products of poly(meth)acrylic acid and (B) a saccharide in a weight ratio of 95:5 to 20:80, and having an oxygen gas permeability coefficient of 5.00.times.10.sup.-3 ml(STP).multidot.cm/m.sup.2 .multidot.h.multidot.atm{Pa} or lower as measured under conditions of 30.degree. C. and 80% relative humidity. A production process of the gas barrier film, in which a film is formed from the mixture, and then subjected to a heat treatment under specific conditions, is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.