摘要:
The present invention provides a film including, in at least a part thereof, a layer comprising an ethylene-based resin, which is a copolymer of ethylene and an α-olefin of 4 to 10 carbon atoms, and satisfies the following requirements (1) to (5) at the same time or an ethylene-based resin composition containing the resin; (I) the melt flow rate at 190°C under a load of 2.16 kg is in the range of 0.1 to 50 g/10 min, (II) the density is in the range of 875 to 970 kg/m 3 , (III) the ratio of a melt tension at 190°C to a shear viscosity at 200°C and an angular velocity of 1.0 rad/sec is in the range of 1.00×10 -4 to 9.00×10 -4 , (IV) the sum of the number of methyl branches and the number of ethyl branches, each number being based on 1000 carbon atoms and measured by 13 C-NMR, is not more than 1.8, and (V) the zero shear viscosity [η 0 (P)] at 200°C and the weight-average molecular weight (Mw) as measured by a GPC-viscosity detector method (GPC-VISCO) satisfy the following relational formula (Eq-1): 0.01 × 10 - 13 × Mw 3.4 ≤ η 0 ≤ 4.5 × 10 - 13 × Mw 3.4
摘要:
Metallocene compounds of the invention are useful as olefin polymerization catalysts or catalyst components. Olefin polymerization processes of the invention involve an olefin polymerization catalyst containing the metallocene compound. In detail, the olef in polymerization catalysts can catalyze with high polymerization activity the production of olefin polymers having high melt tension, excellent mechanical strength and good particle properties, and the olefin polymerization processes involve the catalysts. Ethylene polymers according to the invention are obtained by the polymerization processes and have higher processability and easy-opening properties and particularly excellent mechanical strength compared to conventional ethylene polymers. Thermoplastic resin compositions of the invention contain the ethylene polymers. In more detail, shaped articles or films are obtained from the ethylene polymers or the thermoplastic resin compositions containing the ethylene polymers, and laminate films include the films. According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.
摘要:
According to an ethylene-based resin composition having the following requirements (1) to (4) as a material such as packaging material, a film having strength for the protection of contents and rigidity (e.g., easy opening and self-standability on packaging contents in a packaging material) in an excellent balance can be provided. (1) A melt flow rate (190°C, 2.16 kg load) is 0.1 g/10 min or more and 1.0 g/10 min or less, (2) a density is 915 kg/m 3 or more and 935 kg/m 3 or less, (3) a melt index (I21: 190°C, 21.6 kg load) is 45 or less, and (4) a ratio of the amount of heat of fusion at 120°C or higher (Hh/Ht), which is the ratio of the amount of heat of fusion (Hh) determined from a DSC curve at 120°C or higher to the total amount of heat of fusion (Ht) determined from a DSC curve of DSC measurement, is 10% or more and 55% or less.
摘要:
[Object] A laminate is provided which can form packaging bags having a wide range of packaging feasible temperatures and excellent high-speed liquid packaging properties. [Solution] The laminate includes a sealant layer and an intermediate layer disposed in contact with the sealant layer, the sealant layer including an ethylene/α-olefin copolymer satisfying the requirements (x0) to (x3). (x0) The copolymer is a copolymer of ethylene and a C3-C20 α-olefin. (x1) The MFR is 1 to 50 g/10 min. (x2) The density is 890 to 910 kg/m 3 . (x3) 0.35 ≤ ΔH (80)/ΔH ≤ 0.85, and 0.60 ≤ ΔH (100)/ΔH ≤ 0.85, wherein ΔH is the total heat of melting observed during DSC, and ΔH (T) is the heat of melting observed during heating from 0°C to T°C.