Shrinkable film
US6352785B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1999 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Oct 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a shrinkable film characterized by being a laminate film having at least one layer formed of a gas barrier resin composition satisfying the following expressions (1) and (2) and by having an average shrinking rate in its longitudinal and transverse directions after immersion in a 120° C. oil bath for ten seconds of 45% or more:ln(OTR/22.5)+0.0698(Tim−157)<−0.06  (1)T2−T1≦20  (2)(where in the expression (1), OTR and Tim are, respectively, an oxygen transmission rate (cc/m2·day·atm) of a 1-&mgr;m thick portion of a film formed of the gas barrier resin composition at 23° C. and a relative humidity of 0% and a melting point of the gas barrier resin composition, and in the expression (2), T1 is a haze (%) of a 30-&mgr;m thick film of the gas barrier resin composition left at 23° C. and a relative humidity of 48% for 48 hours and T2 is a haze (%) of a 30-&mgr;m thick film of the gas barrier resin composition left at 40° C. and a relative humidity of 90% for 24 hours.)The present invention relates to shrinkable films considering the environment which are suitably used for wrapping foo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.