Uniaxially stretched multi-layer laminate film, and optical member comprising same
US10054727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2015 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Jul 15, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2551/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a uniaxially stretched multi-layer laminate film including a first layer and a second layer alternately laminated each other, wherein the first layer is a layer containing a polyester, the polyester containing an ethylene naphthalate unit in an amount of 50 mol % or more and 100 mol % or less on a basis of a repeating unit that constitutes the polyester, and a polymer that forms the second layer is a copolymer polyester containing, as copolymer components, a 2,6-naphthalenedicarboxylic acid component, an ethylene glycol component, and a trimethylene glycol component, (A) the content of an ethylene naphthalate unit in the polyester of the first layer being 80 mol % or more and 100 mol % or less on a basis of the repeating unit that constitutes the polyester, or (B) the polymer that forms the second layer being the copolymer polyester further containing, as a copolymer component, an alicyclic diol component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.