Mitsui Chemicals, Inc.

Norihide Inoue

Hiroshi Hoya

Masayoshi Yamaguchi

Akira Yamashita

Kiminori Noda

Hiroshi Uehara

Manabu Kawamoto

Eiji Shiba

Keiji Okada

Shigenobu Ikenaga

Nobuo Kawahara

Norio Kashiwa

Shinichi Kojoh

Ryoji Mori

Munehito Funaya

Hiromu Kaneyoshi

Takayuki Kuroki

Koji Kawai

Naritoshi Hirota

Ichiro Takeishi

Kazuhide Maruyama

Takashi Kimura

Hiroshi Takayasu

Means for solving the problems The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below:

Propylene based resin composition and use thereof

Means for Solving the Problems The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below:

The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below:

Propylene resin composition and use thereof

The present invention is directed to a heat-sealable propylene-based polymer composition comprising a propylene polymer composition including a propylene polymer component and propylene/ethylene random copolymer component; an ethylene/&#x3b1;-olefin random copolymer; and a soft propylene polymer composition. The present invention also provides a heat-sealable film using the composition and a packaging bag comprising the film. The heat-sealable film of the present invention has high heat-seal strength, with little decrease in heat-seal strength even after heat treatment. The heat-sealable film also has excellent blocking resistance, rigidity and low-temperature impact resistance.

Heat-sealable propylene-based polymer composition, heat-sealable film, and uses thereof

A propylene polymer resin composition characterized in that it has a flexural modulus in the range of 200 to 1200 MPa and a melt flow rate (MFR) measured at 230&#xb0; C. in the range of 0.1 to 30 g/min, and a melt tension (MT (mN)) and an MFR (g/10 min) measured at 230&#xb0; C. satisfy a specific formula, and a sheet or film obtained therefrom. According to the present invention, there is provided a polyolefin film which is excellent in transparency and especially excellent in transparency and low-temperature heat shrinkable properties after stretching.

Propylene polymer composition, film, stretched film, shrink film and a method for producing shrink package

A polypropylene composite film having a propylene/1-butene random copolymer which has 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75&#xb0; C. and a crystallization rate at 45&#xb0; C. of 10 minutes or less, and satisfying the following relation, 146 exp (&#x2212;0.022M)&#x2267;Tm&#x2267;125 exp (&#x2212;0.032M), and an olefin catalyst for preparation thereof.

Polypropylene composite film comprising a metallocene-catalyzed propylene/1-butene random copolymer

A polypropylene composition containing a propylene/1-butene random copolymer which contains 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75&#xb0; C. and a crystallization rate at 45&#xb0; C. of 10 minutes or less, and satisfying the following relation, 146 exp (&#x2212;0.022M)&#x2267;Tm&#x2267;125 exp (&#x2212;0.032M), and an olefin catalyst for preparation thereof.

Propylene copolymer, polypropylene composition and uses thereof, transition metal compound and olefin polymerization catalyst

A propylene/1-butene random copolymer containing 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75&#xb0; C. and a crystallization rate at 45&#xb0; C. of 10 minutes or less, and satisfying the following relation, 146 exp (&#x2212;0.022M)&#x2267;Tm&#x2267;125 exp (&#x2212;0.032M), and an olefin catalyst for preparation thereof.

Propylene copolymer, polypropylene composition, and uses thereof, transition metal compounds and catalyst for olefin polymerization

A resin composition containing 1 to 50% by weight of a propylene-based copolymer (a) which has a melting point (Tm (a)) as measured by a differential scanning calorimeter (DSC) of 100&#xb0; C. or lower, or has no melting point, and 50 to 99% by weight of a polymer (b), and a film obtained therefrom are provided, and preferably the initial elastic modulus of the film measured according to JISK6781 is 300 MPa or less. The film has excellent transparency, heat sealing property and tear resistance.

Resin composition and film obtained therefrom

A composition for sealants and films comprising polymers (A-b), (B-b) and from 0 to 50% by weight (C-b) is taught. Polymer (A-b) contains 10 to 70% by weight of an ethylene/&#x3b1;-olefin polymer having a &#x3b1;-olefin content of 7 to 30 mol %, a density of 0.850 to 0.900 g/cmand a melt flow rate (MFR-A), at 190&#xb0; C., of 0.1 to 10 g/10 min. Polymer (B-b) contains 10 to 80 wt % propylene polymer with a melt flow rate (MFR-B), at 230&#xb0; C., of 0.5 to 100 g/10 min. Polymer (C-b) contains an ethylene polymer having a density of 0.900 to 0.960 g/cm. The ratio of MFR-B to MFR-A is 3 to 500.

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Ichihara, Japan

Norihide Inoue