Multilayered thermoplastic film and sign cutting method using the same
US6770360B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to a multilayered thermoplastic film comprising: a thermoplastic core layer having a first side and a second side, the core layer comprising: a polyolefin having a density in the range of about 0.89 to about 0.97 grams per cubic centimeter; a second polymeric material selected from ionomers derived from sodium, lithium or zinc and an ethylene/methacrylic acid copolymer, and a combination thereof, and a light stabilizer; an abrasion and scuff resistant clear first thermoplastic skin layer overlying the first side of the core layer, and a clear second thermoplastic skin layer overlying the second side of the core layer, both skins containing light stabilizer. The composition of the core layer is different from the composition of the skin layers, and the core layer and the skin layers are characterized by the absence of PVC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.