Sumitomo Chemical Company, Limited

Katsuhiro Yamada

Yoshinobu Nozue

Yasutoyo Kawashima

Yuki Iseki

Tatsuhiro Nagamatsu

Hisakatsu Hama

Masaaki Tsutsubuchi

Kenji Sogoh

An ethylene based polymer composition comprising the following component (A) and the following component (B) wherein the content of the component (B) is 0.1 to 20 parts by weight per 100 parts by weight of the component (A): Component (A): an ethylene-&#x3b1;-olefin copolymer satisfying all of the following requirements (a1) to (a3): Component (B): an ethylene-&#x3b1;-olefin copolymer satisfying all of the following requirements (b1) to (b3):

Ethylene based polymer composition and film

A resin composition for cross-linking foam molding having a polymer composition which comprises 100 parts by weight of the following component (A) and 0.5 to 20 parts by weight of the following component (B); a foaming agent; and a cross-linking agent, wherein the component (A) is an ethylene-based polymer satisfying the following conditions (a1) to (a2): (a1) the density is 860 to 935 kg/m3, and (a2) the melt flow rate (MFR) is 0.1 to 10 g/10 minutes, and the component (B) is an ethylene-&#x3b1;-olefin copolymer satisfying the following conditions (b1) to (b3): (b1) the density is 890 to 925 kg/m, (b2) the intrinsic viscosity [&#x3b7;] determined in a tetralin solution is 4 to 15 dL/g, and (b3) the activation energy of flow (Ea) is less than 50 kJ/mol.

Resin composition for cross-linked foam molding, cross-linked foam molded article, and method for production of cross-linked foam molded article

A resin composition, comprising (a) 50 to 99% by weight of a crystalline polypropylene resin, and (b) 1 to 50% by weight of a propylene copolymer comprising 50 to 85% by mol of a propylene unit and 15 to 50% by mol of a C&#x3b1;-olefin unit, the propylene copolymer having (1) no meting point in a range of &#x2212;100 to 200&#xb0; C., or a melting point of 50&#xb0; C. or lower in that temperature range, (2) an isotactic selectivity of 90% or higher, (3) a molecular weight distribution of 3 or smaller, and (4) an intrinsic viscosity of 0.1 to 10 dl/g.

Resin composition

An ethylene-&#x3b1;-olefin copolymer having monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin of 3 to 20 carbon atoms, a melt flow rate (MFR) of 0.01 to 4 g/10 minutes, a density of 890 to 970 kg/m, an activation energy of flow of 50 kJ/mol or more and a molecular weight distribution measured by gel permeation chromatography of 3 or more, wherein a characteristic relaxation time (&#x3c4;) determined by a melt viscoelasticity measurement or an external haze ratio (EHR) satisfies a relationship of the following formula (1) or (2), respectively:3&#xd7;MFR+1.1&#x3e;&#x3c4;&#x3e;1.3&#xd7;MFR+1.4&#x2003;&#x2003;(1)EHR&#x2266;&#x2212;15&#xd7;log MFR+0.145&#xd7;&#x2212;47&#x2003;&#x2003;(2)

Ethylene-&#x3b1;-olefin copolymer, resin composition containing the same and molded article thereof

A resin composition for pressure-foam molding, which comprises an ethylene-based copolymer and a foaming agent, wherein the ethylene-based copolymer has monomer units derived from ethylene and monomer units derived from an a-olefin having 3 to 20 carbon atoms, has a melt flow rate of 0.01 to 0.7 g/10 minutes, a molecular weight distribution of 5 or more determined by a gel permeation chromatography, an activation energy of flow of 40 kJ/mol or more, and inflection points of 3 or less on a melting curve within temperature range from 25&#xb0; C. to the end point of melting obtained by a differential scanning calorimetry; a foam obtained by press foaming; and a process for producing the foam.

Resin composition for press foaming, foam and process for producing the foam

An ethylene-&#x3b1;-olefin copolymer comprising repeating units derived from ethylene and repeating units derived from an &#x3b1;-olefin having 3 to 20 carbon atoms and having a melt flow rate (MFR) of from 0.01 to 100 g/10 min, a density (d) of from 890 to 970 kg/m, a flow activation energy (Ea) of 50 kJ/mol or more, a molecular weight distribution (Mw/Mn) of 3 or more measured by gel permeation chromatography, and a hexane extraction rate (C) of 2.8% or less.

Ethylene-&#x3b1;-olefin copolymer and food packaging material

An ethylene-&#x3b1;-olefin copolymer containing monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin having 4 to 20 carbon atoms, and having a density of 890 to 970 kg/m, an activation energy of flow of 50 kJ/mol or more, a molecular weight distribution of 3 or more determined by a gel permeation chromatography, and the number of inflection points of 3 or less on a melting curve obtained by a differential scanning calorimetry within a temperatures ranges of from 25&#xb0;C. to an end point of melting.

Ethylene-&#x3b1;-olefin copolymer and molding thereof

A copolymer having monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/mand an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.

Ethylene-&#x3b1;-olefin copolymer

An ethylene-&#x3b1;-olefin copolymer having monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.

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Chiba, Japan

Katsuhiro Yamada