Release film
US6159595A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Jan 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31667
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A release film comprising a release layer provided on at least one side of a biaxially oriented polyethylene-2,6-naphthalenedicarboxylate film, wherein: PA1 (1) the release layer is a layer formed of a resin composition consisting substantially of an acrylic resin, a silicone resin and a melamine crosslinking agent, the amount of the silicone resin being 1 to 100 parts by weight based on 100 parts by weight of the total amount of the acrylic resin and the melamine crosslinking agent, and PA1 (2) the release film has a percentage change in dimension in absolute value of 0.3% or less in both a longitudinal direction and a direction perpendicular thereto as measured at 120.degree. C. under a stress of 150 gf/mm.sup.2. The release film is useful as a protective film for formation of a coating from a coating solution containing a variety of solvents or as a carrier film for formation of a sheet or a film, and has very small percentage change in dimension at the time of heat treatment, in particular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.