Plastic bags of blends of linear ethylene polymers and aromatic polymers
US4804564A · kind A · utility
5Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Aug 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1345
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Plastic bags are made from linear ethylene homopolymer or linear low density copolymers (LLDPE) blended with up to about 10 weight percent of an aromatic polymer, e.g., polystyrene or poly(para-methylstyrene), to improve the ease of opening the bags by reducing the blocking tendency of the film. Although ease of opening is improved the aromatic polymer does not adversely affect the other physical properties of the bag, such as MD tear strength and stiffness, but improves them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.