Resin compositions and use of the same

US20010014718A1Inactive Publication Date: 2001-08-16MITSUI CHEM INC

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Patent Information

Authority / Receiving Office: US · United States
Current Assignee / Owner: MITSUI CHEM INC
Publication Date: 2001-08-16
Estimated Expiration: Not applicable · inactive patent

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Abstract

Asoft resin composition of the present invention comprises a polyethylene resin (A) and an ethylene / alpha-olefin random copolymer (B) comprising ethylene and an alpha-olefin having 3 to 20 carbon atoms at a specific proportion, wherein an MFR and density of the polyethylene resin (A), and a density, intrinsic viscosity, glass transition temperature, crystallinity, molecular weight distribution, B value and geta* values of the copolymer (B) are each in a specific range. The soft resin composition is excellent in melt flow characteristics, namely excellent in moldability, and is capable of providing moldings excellent in balance between pliability and heat resistance. An ethylene / alpha-olefin copolymer resin composition of the present invention comprises a liner ethylene / alpha-olefin copolymer (A-alpha) comprising ethylene and an alpha-olefin having 4 to 20 carbon atoms and a long-chain branched ethylene / alpha-olefin random copolymer (B-alpha) comprising ethylene and an alpha-olefin having 3 to 20 carbon atoms in a specific proportion, wherein a density and melt flow rate of the copolymer (A-alpha) and a density, MFR, intrinsic viscosity, glass transition temperature, crystallinity, molecular weight distribution, B value and geta* values of the copolymer (B-alpha) are each in a specific range. A film of the invention is produced from the resin composition. The ethylene / alpha-olefin copolymer resin composition is excellent in heat stability and suitability for high-speed molding, and can provide the films excellent in mechanical strength properties, low temperature heat-sealing properties and sealing stability, and further in slip characteristics and anti-blocking properties thereby being excellent in handling properties and suitability for high-speed filling upon packaging by automatic filling machines. The film also exhibits the effect as described above.

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Description

[0001] The present invention relates to a polyethylene resin composition excellent in moldability and capable of providing moldings having excellent pliability.

[0002] The present invention relates to a soft resin composition containing a polyethylene resin, which is capable of providing moldings excellent, particularly, in pliability and heat resistance and has an excellent moldability.

[0003] The present invention also relates to an ethylene / .alpha.-olefin copolymer composition suitable for use mainly in packaging films. More particularly, the present invention relates to an ethylene / .alpha.-olefin copolymer composition which is, as compared with the conventional ethylene copolymer compositions, excellent in film-moldability and capable of high-speed molding, and also capable of providing a film excellent in machanical strength properties, low temperature heat-sealing properties and heat-sealing stability, and further in slip characteristics and anti-blocking properties thereby bein...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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