Heat sealable laminated propylene polymer packaging material
US4230767A · kind A · utility
127Cited by
14References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Feb 8, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A packaging material having an excellent seal packaging property, which comprises (A) a base layer consisting of a stretched film made of a polymer composition comprising a propylene polymer and (B) a surface layer consisting of a stretched film made of a polymeric mixture comprising a polymer blend provided on at least one surface of said base layer, said polymer blend comprising a copolymer of ethylene and propylene and a copolymer of butene and any other polymerizable monomer having an ethylenic unsaturation in a weight proportion of 5:95 to 95:5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.