Method for producing optical film
US7064086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2004 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Jun 16, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for producing an optical film, the optical film having the same molecule length in X-axis, Y-axis and Z-axis orientation, comprising the steps of: stretching the optical film along the X-axis; fixing the length of the optical film along the Y-axis; heating the optical film to above an extension temperature; shrinking the optical film along the X-axis; stretching the optical film along the Z-axis; and enabling the molecule length of the optical film along the X-axis to be longer than that along the Z-axis while the molecule length of the optical film along the Z-axis is longer than that along the Y-axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.