Polyethylene stretch film
US9388306B2 · kind B2 · utility
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10References
14Claims
0Family size
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Key dates
| Filing date | Mar 4, 2008 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Jan 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In one aspect is a film comprising: (a) within the range of from 50 to 99 wt % linear low density polyethylene based on the weight of the core composition; and (b) within the range of from 1 to 50 wt % propylene-α-olefin copolymer based on the weight of the core composition, wherein the propylene-α-olefin copolymer possesses: (i) a melting temperature (Tm) of less than 105° C., and (ii) a heat of fusion (Hf) of less than 75 J/g; wherein the film is a cast or blown film. The films have excellent strength and elasticity and are ideal for such applications as stretch wrap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.