Sumitomo Chemical Company, Limited

Naoko Ochi

Yoshinobu Nozue

Yasutoyo Kawashima

Hidenori Hanaoka

Kazuo Takaoki

Kazuyuki Ito

Takuya Ogane

Masato Takano

Hiroshi Toyoda

Risa Murata

Tomokazu Yasunaga

Yuki Azuma

Shinyo Tamura

Masayuki Hasegawa

Provided are a film having an excellent balance between heat seal strength and opening strength, a method of producing the film, and a bag obtained by heat-sealing the film. According to the present invention, there is provided a film containing a resin, wherein a resin density of the film is 860 kg/mor more and less than 900 kg/m, and on at least one surface of the film, an arithmetic mean height Sa satisfies the following Expression [1]:0.10 &#x3bc;m&#x2264;Sa&#x2264;0.50 &#x3bc;m&#x2003;&#x2003;[1], and

Film, method of producing film, and bag

An ethylene-&#x3b1;-olefin copolymer capable of implementing formation of a film having excellent slipperiness and suppressed fish eyes, a method of producing the ethylene-&#x3b1;-olefin copolymer, an ethylene-based resin composition containing the ethylene-&#x3b1;-olefin copolymer, and a film containing the ethylene-&#x3b1;-olefin copolymer or the ethylene-based resin composition. An ethylene-&#x3b1;-olefin copolymer according to the present invention has: a monomer unit (1) based on ethylene; and a monomer unit (2) based on an &#x3b1;-olefin having 3 to 20 carbon atoms, wherein a branching parameter is 0.70 to 0.90, and a light scattering area ratio is 1.60 to 3.60.

Ethylene-&#x3b1;-olefin copolymer, method of producing ethylene-&#x3b1;-olefin copolymer, ethylene-based resin composition, and film

A film including a resin component is provided. The resin density is 900 kg/mor more and 930 kg/mor less. The load length ratio (Tp(50)) at cutting level 50% of the surface roughness curve of at least one film surface is 0.01% or more and 29.0% or less.

Film

An object of the present invention is to provide a method which can simply suppress fouling in a reactor and, according to the present invention, there is provided a method of polymerizing addition polymerizable monomers using a catalyst formed by bringing (A) a transition metal compound represented by the following general formula [3] or &#x3bc;-oxo type transition metal compound dimer thereof and (B) an activating agent into contact with one another, the method comprising polymerizing addition polymerizable monomers in a solvent to which a surfactant-containing particle obtained by mixing a particle composed of an inorganic compound or an organic polymer, and at least one surfactant selected from the group consisting of a compound represented by the following general formula [1] and a compound represented by general formula [2] has been added.R&#x2014;O&#x2014;(&#x2014;R&#x2014;O&#x2014;)-Q&#x2003;&#x2003;[1]R'C(&#x2550;O)NR&#x2003;&#x2003;[2]LMX&#x2003;&#x2003;[3].

Polymerization method using surfactant-containing particle

An ethylene-&#x3b1;-olefin copolymer wherein the copolymer has a monomer unit based on ethylene and a monomer unit based on an &#x3b1;-olefin having 3 to 20 carbon atoms, the density (d) is 860 to 950 kg/m, the melt flow rate (MFR) is 1 to 100 g/10 min, the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 4 to 30, the ratio (Mz/Mw) of the Z average molecular weight (Mz) to the weight average molecular weight (Mw) is 2 to 5, the swell ratio (SR) is 1.8 or more, and the characteristic relaxation time (&#x3c4;) obtained by linear viscoelasticity measurement is 0.01 to 10 seconds.

Ethylene-a-olefin copolymer and molded article

An ethylene-&#x3b1;-olefin copolymer, wherein the ethylene-&#x3b1;-olefin copolymer has a density of 860 to 950 kg/mand a melt flow rate of 0.01 to 100 g/10 min, wherein in a molecular weight curve measured by gel permeation chromatography, the molecular weight of the copolymer providing the highest peak exists within the range of 10,000 to 20,000, wherein the height of the peak at a molecular weight of 177,000 is 5 to 30% where the height of the highest peak is 100%, wherein a characteristic relaxation time of the copolymer satisfies a relation represented by formula (1), and wherein the ethylene-&#x3b1;-olefin copolymer exhibits more than one melt peak observed by a differential scanning calorimeter.40.2&#xd7;MFR&#x3c;&#x3c4;&#x3c;71.8&#xd7;MFR&#x2003;&#x2003;(1)

Ethylene-&#x3b1;-olefin copolymer and molded article

An ethylene-&#x3b1;-olefin copolymer comprising monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin having 3 to 20 carbon atoms, having a density (d) of 860 to 950 kg/m, having a melt flow rate (MFR) of 0.01 to 100 g/10 min, having a bimodal molecular weight distribution, and having a single melting peak measured by a differential scanning calorimeter (DSC).

Ethylene-&#x3b1;-olefin copolymer, molded article, catalyst for copolymerization, and method for producing an ethylene-&#x3b1;-olefin copolymer

An ethylene-&#x3b1;-olefin copolymer wherein the copolymer has a monomer unit based on ethylene and a monomer unit based on an &#x3b1;-olefin having 3 to 20 carbon atoms, the density (d) is 860 to 950 kg/m, the melt flow rate (MFR) is 1 to 100 g/10 min, the flow activation energy (Ea) is 60 kJ/mol or more, the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 5.5 to 30, the ratio (Mz/Mw) of the Z average molecular weight (Mz) to the weight average molecular weight (Mw) is 2 to 5, and the swell ratio (SR) is 1.55 or more and less than 1.8.

The purpose of the invention is to provide an ethylene-&#x3b1;-olefin copolymer, which has a high melt tension but a small neck-in, and a molded object produced by extrusion molding of the copolymer. An ethylene-&#x3b1;-olefin copolymer having a monomer unit based on ethylene and a monomer unit based on an &#x3b1;-olefin having 3 to 20 carbon atoms, which has a melt flow rate (MFR) of 0.1 to 100 g/10 min, a density (d) of 850 to 940 kg/m, a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2 to 12, and a value g* defined by the following formula (I) of 0.50 to 0.75:*=[&#x3b7;]/([&#x3b7;]*)&#x2003;&#x2003;(I).

Ethylene-&#x3b1;-olefin copolymer and molded object thereof

A transition metal compound represented by the formula (1-1) or the formula (1-2) (M is a transition metal atom) and a process for producing a catalyst for olefin polymerization comprising a step of bringing the transition metal compound into contact with a co-catalytic component for activation. 

Transition metal compound and catalyst for olefin polymerization

An ethylene-&#x3b1;-olefin copolymer comprising monomer units derived from ethylene and monomer units derived from an &#x3b1;-olefin having 3 to 20 carbon atoms, having a density (d) of 860 to 950 kg/m, having a melt flow rate (MFR) of 0.05 to 100 g/10 min, having a ratio (Mw/Mn) of the weight average molecular weight (Mw) thereof to the number average molecular weight (Mn) thereof of 2 to 10, having a swell ratio (SR) of less than 1.35, and having a g* of 0.50 to 0.75.

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Chiba, Japan

Naoko Ochi