| abstract |
The polyethylene composition comprises a first polyethylene, which is an ethylene copolymer having a weight average molecular weight of 70,000 to 250,000 and a molecular weight distribution M w / M n of less than 2.3, a weight average molecular weight of 15,000 to 100,000, a molecular weight distribution M w / M n of greater than 2.3. A second polyethylene that is an ethylene copolymer or homopolymer, and a third polyethylene that is an ethylene copolymer or homopolymer having a weight average molecular weight of 70,000 to 250,000 and a molecular weight distribution M w /M n greater than 2.3, wherein The first polyethylene has more short-chain branches than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction of at least 10% by weight in CEF analysis. The film made from the polyethylene composition has a machine direction 1% secant modulus (at a film thickness of about 1 mil) of 200 MPa or more, a sealing initiation temperature (SIT) of 90° C. or less (at a film thickness of about 2 mil), (about 2 mils). It will have a hot tack window area (AHTW) of 160 Newtons° C. or more (at a film thickness of mil) and an oxygen transmission rate (OTR) of 600 cm 3 per 100 square inches or more. |