Bridgestone Corporation

Yasunori Tarutani

Norihiko Kaga

Hisataka Kataoka

Takato Inamiya

Atsushi Nakayama

Yasuo Fukushima

Shingo Ohno

Yuki Itoh

Hiroyuki Fudemoto

Shingo Oono

Akira Yoshitake

Aya Hotta

Saaya Shiono

Shoko Inutsuka

Midori Sugawa

Provided is a pneumatic actuator having improved durability. A pneumatic actuator () comprises an actuator body () including: a cylindrical tube () configured to expand and contract by air pressure; and a cylindrical sleeve () formed by weaving cords () oriented in predetermined directions, wherein in a no-load and no-pressure state, an average angle (&#x398;) of the cords () with respect to an axial direction (D) of the actuator is 20 degrees or more and less than 45 degrees, and in a state in which an average angle (&#x398;) of the cords () with respect to the axial direction (D) of the actuator is 45 degrees with an air pressure of 5 MPa, a ratio (S2/S1) of a total area (S2) of gaps () of the cords () to an area (S1) of an outer surface of the actuator body () is 35% or less.

Pneumatic actuator

Provided is a hydraulic actuator with improved durability, the hydraulic actuator (), having an actuator main body () constituted of a cylindrical tube () capable of expanding/contracting by hydraulic pressure and a cylindrical sleeve () formed by cords () woven to be disposed in predetermined directions, wherein: the average angle (&#x398;) formed by the cords () with respect to the axis direction (D) of the actuator with no load and no pressure applied thereon is in a range of &#x2265;20&#xb0; and &#x3c;45&#xb0;; and in a state where the average angle (&#x398;) formed by the cords () with respect to the axis direction (D) is 45&#xb0; under hydraulic pressure of 5 MPa, a ratio (S/S) of the total area (S) of clearances () between the cords () with respect to an area (S) of an outer peripheral surface of the actuator main body () is 35% or less.

Hydraulic actuator

A polyamide-based thermoplastic elastomer including a hard segment and a soft segment, wherein the hard segment contains polyamide 612 and the soft segment contains a polyamine.

Polyamide-based thermoplastic elastomer and tire

A tire including a tire skeleton body that is made of a resin material containing a polyamide-based thermoplastic elastomer and has a ring shape, wherein the polyamide-based thermoplastic elastomer includes a hard segment, a soft segment consisting of a constituent unit derived from polypropylene glycol, and a binding portion that binds two or more segments and that consists of a constituent unit derived from a dicarboxylic acid of from 6 to 20 carbons, the polyamide-based thermoplastic elastomer having a weight average molecular weight of from 20,000 to 250,000.

Tire

A circular tire frame includes a resinous material including a polyamide-based thermoplastic elastomer. The polyamide-based thermoplastic elastomer is a copolymer formed by polymerization of at least a polymer (HS) forming a hard segment and a polymer (3SS) forming a soft segment and having three or more functional groups.

Tire skeleton and tire

A tire includes a circular tire frame formed of a resin material, the resin material including a polyamide-based thermoplastic elastomer having a weight average molecular weight of from 15,700 to 75,000. Included with the tire may be side portions and a crown portion that serves as an outer peripheral portion that is in communication with the side portions.

The present invention provides a composition for a solar cell sealing film prepared by mixing an ethylene-&#x3b1;-olefin copolymer a metallocene catalyst (m-LLDPE) and another polymer as resin components, wherein the composition has the same processability as a composition containing m-LLDPE alone as a resin component and provides a solar cell sealing film having the same transparency as the composition containing m-LLDPE alone as resin component. A composition for a solar cell sealing film comprising m-LLDPE and low-density polyethylene (LDPE), wherein the weight average molecular weight of m-LLDPE (M) is 200,000 or less, the weight average molecular weight of LDPE (M) is 250,000 or less, and the mass ratio of m-LLDPE to LDPE (m-LLDPE:LDPE) is in a range of 80:20 to 30:70, and a solar cell sealing film prepared using the same.

Composition for solar cell sealing film, method for producing same and solar cell sealing film

The present invention provides a solar cell sealing film whereby generation of gas is decreased. The solar cell sealing film comprises a resin mixture of an ethylene-vinyl acetate copolymer and a polyethylene, and an organic peroxide. The mass ratio (EVA:PE) of the ethylene-vinyl acetate copolymer (EVA) to the polyethylene (PE) is 8:2 to 3:7, the content of the organic peroxide is 0.1 to 1.0 parts by mass based on 100 parts by mass of the resin mixture, and the gel rate after crosslinking is 20 to 80% by mass.

Solar cell sealing film and solar cell using the same

The present invention provides a solar cell sealing film in which the shrinkage is prevented when heated. The solar cell sealing filmA,B comprises a resin mixture of an ethylene-vinyl acetate copolymer and polyethylene, and an organic peroxide. The mass ratio (EVA:PE) of the ethylene-vinyl acetate copolymer (EVA) to the polyethylene (PE) is 8:2 to 3:7 and the melting point of the resin mixture (temperature at a viscosity of 30,000 Pa&#xb7;s) is 80 to 105&#xb0; C.

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Tokyo, Japan

Yasunori Tarutani