Cast stretch film of interpolymer compositions
US6812289B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jul 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to cast films prepared from interpolymer compositions comprising;(A) a substantially linear ethylene/&agr;-olefin interpolymer present in the composition in an amount of from about 10 to about 100% by weight based on the combined weight of Components A and B; and(B) a heterogeneous interpolymer present in the composition in an amount of from about 0 to about 90% by weight based on the combined weight of Components A and B; andwherein said interpolymer composition has an I10/I2 value of < about 10.0 and is characterized as having a viscosity at 100 rad/s and a relaxation time (&tgr;) which satisfies either of the following relationships;Log(viscosity at 100 rad/s)≦4.43−0.8 log(I2)orlog(&tgr;)>−1.2−1.3* log(I2)The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.