Ethylene copolymer composition and uses thereof
US6329465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is intended to obtain an ethylene copolymer composition having excellent transparency, mechanical strength and moldability. The ethylene copolymer composition comprises an ethylene/.alpha.-olefin copolymer and high-pressure radical process low-density polyethylene. The ethylene/.alpha.-olefin copolymer is a copolymer of ethylene and an .alpha.-olefin of 6 to 8 carbon atoms and has the following properties: the melt tension (MT) and the melt flow rate (MFR) satisfy the relation 9.0.times.MFR.sup.-0.65 >MT>2.2.times.MFR.sup.-0.84 ; the activation energy ((E.sub.a).times.10.sup.-4 J/molK) of flow, the carbon atom number (C) of the .alpha.-olefin in the copolymer and the .alpha.-olefin content (x mol %) in the copolymer satisfy the relation (0.039Ln(C-2)+0.0096).times.x+2.87<Ea.times.10.sup.-4.ltoreq.(0. 039Ln(C-2)+0.1660).times.x+2.87; and the haze of an inflation film produced from said copolymer satisfies a specific relation. This ethylene copolymer composition can be used for producing molded products such as films, sheets, packaging materials, injection molded products, expansion molded products and fibers. These molded products are excellent in mechanical st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.