Multilayer film comprising matte surface layer and articles
US8659829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2011 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/286
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical films are described comprising a color shifting film comprising a matte surface layer; and light control microstructured layer disposed proximate the color shifting film. The optical film may comprise a matte layer disposed on a major surface of the color shifting film and the light control micro structured layer disposed on the color shifting film at an interface that is free of adhesive. Alternatively, the optical film may comprise a film stack comprising a light control film having a light control microstructured layer, a color shifting film, and an adhesive layer between the light control film and color shifting film. In some embodiments, the matte layer comprises matte particles. In other embodiments, the matte layer comprises a plurality of microstructures and no greater than 50% of the microstructures comprise embedded matte particles. In some embodiments, the microstructures are substantially free of embedded matte particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.