Polypropylene resin composition for oriented film and oriented film of the composition
US5639537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Dec 14, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24405
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polypropylene resin composition for oriented film excellent in transparency, slip property and blocking resistance which comprises the following components (a) and (b), and an oriented film obtained by orienting the composition at least in uniaxial direction: PA1 (a) 100 parts by weight of a crystalline polypropylene resin, and PA1 (b) 0.05 or more but less than 1 part by weight of crosslinked polymer beads which have a weight average particle diameter of 0.5-5 .mu.m, comprise 60-96% by weight of styrenic monomer units, 2-38% by weight of radical-polymerizable monomer units, the refractive index of the polymer of the radical-polymerizable monomer being 1.50 or less, and 2-50% by weight of crosslinkable monomer units, and give an average protuberance height of 60-600 nm on the surface of oriented film obtained by kneading the crosslinked polymer beads into the polypropylene resin followed by working up into oriented film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.