Biaxially oriented polypropylene film substrate free from primer coating and film free from primer coating
US9068097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2010 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Aug 24, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a biaxially oriented polypropylene film substrate free from primer coating, which comprises successively connected affinity layer, core layer and surface layer, said affinity layer comprises 10% to 80% by weight of polypropylene homopolymer, 10% to 80% by weight of polyolefin plastomer and 1% to 10% by weight of anti-adhesion agent; said core layer is polypropylene homopolymer; said surface layer is the same as the affinity layer or a non-coated surface layer that comprises 90% to 99% by weight of polypropylene homopolymer and 1% to 10% by weight of anti-adhesion agent. A film free from primer coating and its preparing method are also provided. The coated film of this invention does not need the process of primer pre-coating, which reduces the relevant equipment costs on one hand and avoids the safety risks when using and restoring solvent type primer on the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.