Crystalline prophylene copolymer compositions having a low seal temperature and good ink adhesion
US5623021A · kind A · utility
13Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Mar 23, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2308/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are a crystalline propylene copolymer composition, film, sheet and plate made therefrom and laminates wherein at least one layer is made therefrom, having low seal initiation temperature and good ink adhesion properties. The composition comprises (percent by weight): PA1 A) 20-60% of a crystalline copolymer of propylene with 1 to 5% ethylene; and PA1 B) 40-80% of a crystalline copolymer of propylene with 1 to 5% ethylene and 6 to 15% C.sub.4 -C.sub.8 .alpha.-olefin. In the composition the total content of ethylene being 1% to 5% and of C.sub.4 -C.sub.8 .alpha.-olefin being 2.4% to 12%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.