Abstract: The purpose of the invention is to provide an ethylene-based resin having a transparency enhanced without excessively lowering an impact strength, which a linear low-density polyethylene has. There is provided an ethylene-based resin satisfying all of the following conditions: (a) its density ranges from 890 to 930 kg/m3, (b) its melt flow rate (MFR) ranges from 0.1 to 10 g/10 min, (c) its activation energy (Ea) of flow is less than 50 kJ/mol, (d) its Mz/Mw is not less than 3.5, (e) its (Mz/Mw)/(Mw/Mn) is not less than 0.9, and (f) its proportion of a resin amount eluted at 100° C. or more as measured by a temperature rise elution fractionation method is less than 1 wt %, provided that a total amount of the ethylene-based resin eluted up to 140° C. is 100 wt %.

Abstract: 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-?-olefin copolymer satisfying the following conditions (b1) to (b3): (b1) the density is 890 to 925 kg/m3, (b2) the intrinsic viscosity [?] 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.

Abstract: An olefin polymerization catalyst is provided formed by contacting a specified transition metal compound (A1), a specified transition metal compound (A2) and a specified solid catalyst component (B) with one another, a molar ratio of (A1)/(A2) being 1 to 90: wherein M1 and M2 are a transition metal atom of Group 4 in the Periodic Table; X1, X2, R1, R3 and R4 are a hydrogen atom, a halogen atom, a hydrocarbyl group or a hydrocarbyloxy group; and Q1 and Q2 are a specified cross-linking group.

Abstract: A polymer composition, including: a first copolymer, including a first monomer unit derived from a monomer of Formula A: (R1SiO1.5)x(R2SiO1.5)y??Formula A wherein R1 is a polymerizable functional group, R2 is a non-polymerizable group, x is a positive integer, and y is a positive integer, provided that x+y=2n, wherein n is an integer greater than or equal to 3; a second monomer unit copolymerizable with the first monomer unit; and a second polymer having no monomer units derived from a monomer of Formula A; wherein the content of the monomer unit of Formula A is 4 wt % or less, based on the total weight of the polymer components of the polymer composition.

Abstract: An ethylene-?-olefin copolymer wherein the copolymer has a monomer unit based on ethylene and a monomer unit based on an ?-olefin having 3 to 20 carbon atoms, the density (d) is 860 to 950 kg/m3, 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.

Abstract: The purpose of the invention is to provide a process for producing a prepolymerization catalyst component which is homogeneous and does not a tendency that it adheres to a wall surface of a dryer and that the prepolymerization catalyst component are aggregated with each other. The process comprises the following steps (1) to (4): step (1): heat-treating a solution containing a metallocene-based compound (B1), which is prepared by dissolving the metallocene-based compound (B1) shown below in a saturated hydrocarbon solvent, at 40° C. or above to obtain a heat-treated material (1); step (2): heat-treating a mixture of the heat-treated material (1) and a metallocene-based compound (B2) shown below at 40° C.

Abstract: An ethylene-?-olefin copolymer wherein the copolymer has a monomer unit based on ethylene and a monomer unit based on an ?-olefin having 3 to 20 carbon atoms, the density (d) is 860 to 950 kg/m3, the melt flow rate (MFR) is 0.01 (g/10 min) or more and less than 1 (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, and the melt tension (MT) is 12 cN or more.

Abstract: An ethylene-?-olefin copolymer wherein the copolymer has a monomer unit based on ethylene and a monomer unit based on an ?-olefin having 3 to 20 carbon atoms, the density (d) is 860 to 950 kg/m3, 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 (?) obtained by linear viscoelasticity measurement is 0.01 to 10 seconds.

Abstract: An ethylene based polymer composition comprising the following component (A), the following component (B) and the following component (C) wherein the content of the component (A) is 120 to 1700 parts by weight per 100 parts by weight of the component (B) and the content of the component (C) is 3 to 20 parts by weight per 100 parts by weight of the component (B): Component (A): an ethylene-?-olefin copolymer satisfying all of the following requirements (a1) to (a3): (a1) the density is 890 to 925 kg/m3, (a2) the melt flow rate (MFR) is 0.1 to 30 g/10 minutes, (a3) the flow activation energy (Ea) is less than 50 kJ/mol, Component (B): an ethylene based polymer satisfying all of the following requirements (b1) to (b3): (b1) the density is 890 to 925 kg/m3, (b2) the melt flow rate (MFR) is 0.

Abstract: 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-?-olefin copolymer satisfying all of the following requirements (al) to (a3): (a1) the density is 890 to 925 kg/m3, (a2) the melt flow rate (MFR) is 0.1 to 10 g/10 minutes, (a3) the flow activation energy (Ea) is less than 50 kJ/mol, Component (B): an ethylene-?-olefin copolymer satisfying all of the following requirements (b1) to (b3): (b1) the density is 890 to 925 kg/m3, (b2) the intrinsic viscosity [?] measured in a tetralin solution is 4 to 15 dL/g, (b3) the flow activation energy (Ea) is less than 50 kJ/mol.

Abstract: An ethylene based polymer composition comprising the following component (A) and the following component (B) wherein the content of the component (B) is 0.5 to 20 parts by weight per 100 parts by weight of the component (A): Component (A): an ethylene based polymer satisfying all of the following requirements (a1) to (a3): (a1) the density is 890 to 925 kg/m3, (a2) the melt flow rate (MFR) is 0.1 to 10 g/10 minutes, (a3) the flow activation energy (Ea) is 50 kJ/mol or more, Component (B): an ethylene-?-olefin copolymer satisfying all of the following requirements (b1) to (b3): (b1) the density is 890 to 925 kg/m3, (b2) the intrinsic viscosity [?] measured in a tetralin solution is 4 to 15 dL/g, (b3) the flow activation energy (Ea) is less than 50 kJ/mol.

Abstract: An ethylene-?-olefin copolymer comprising repeating units derived from ethylene and repeating units derived from an ?-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/m3, 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.

Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units derived from an ?-olefin having 4 to 20 carbon atoms, and having a density of 890 to 970 kg/m3, 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°C. to an end point of melting.

Abstract: An ethylene-?-olefin copolymer comprising repeating units derived from ethylene and repeating units derived from an ?-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/m3, 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.

Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units derived from an ?-olefin having 4 to 20 carbon atoms, and having a density of 890 to 970 kg/m3, 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 range of from 25° C. to an end point of melting.

Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-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/m3, 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 (?) determined by a melt viscoelasticity measurement or an external haze ratio (EHR) satisfies a relationship of the following formula (1) or (2), respectively: 3×MFR?0.75+1.1>?>1.3×MFR?0.5+1.4 ??(1) EHR??15×log MFR+0.