Abstract: A polymer-extruded article produced by extrusion and vulcanization of a polymeric composition includes ethylene-?-olefin-nonconjugated polyene copolymer in an amount of 100 phr; carbon black in an amount ranging from more than 50 to 120 phr, the carbon black having an arithmetic average particle diameter of not smaller than 60 nm; a softener in an amount of not more than 100 phr; and thermo-expansive capsules in an amount ranging from 1 to 10 phr. The polymer-extruded article includes a surface section having an uneven surface derived from thermal expansion of the thermo-expansive capsules, and a rough surface derived from carbon particle of the carbon black and formed at the uneven surface derived form the thermal expansion of the thermo-expansive capsules.

Abstract: A polymer-extruded article produced by extrusion and vulcanization of a polymeric composition includes ethylene-?-olefin-nonconjugated polyene copolymer in an amount of 100 phr; carbon black in an amount ranging from more than 50 to 120 phr, the carbon black having an arithmetic average particle diameter of not smaller than 60 nm; a softener in an amount of not more than 100 phr; and thermo-expansive capsules in an amount ranging from 1 to 10 phr. The polymer-extruded article includes a surface section having an uneven surface derived from thermal expansion of the thermo-expansive capsules, and a rough surface derived from carbon particle of the carbon black and formed at the uneven surface derived form the thermal expansion of the thermo-expansive capsules.

Abstract: A method and a device evaluate a processability of a viscoelastic material. A measuring step and means measure a complex viscosity modulus ?* and two complex elasticity moduli G*1, G*2 in respective two shear ranges with different shear speeds, by the following: varying a vibration frequency and a vibration amplitude at a given temperature range, and controlling a shear stress applied to the viscoelastic material which is mixed under a given mixing condition. The shear stress causes a reactive stress. The complex viscosity modulus ?* and the two complex elasticity moduli G*1, G*2 are measured based on the reactive stress. A first operation operates an apparent activation energy Ea by the following: ?*=A·exp(Ea/RT) where T is temperature, R is gas constant, ?* is complex viscosity modulus. A second operation operates a complex elasticity modulus change ratio G*r, a ratio between the two complex elasticity moduli G*1, G*2.

Abstract: A method and a device evaluate a processability of a viscoelastic material. A measuring step and means measure a complex viscosity modulus &eegr;* and two complex elasticity moduli G*1, G*2 in respective two shear ranges with different shear speeds, by the following: varying a vibration frequency and a vibration amplitude at a given temperature range, and controlling a shear stress applied to the viscoelastic material which is mixed under a given mixing condition. The shear stress causes a reactive stress. The complex viscosity modulus &eegr;* and the two complex elasticity moduli G*1, G*2 are measured based on the reactive stress.