The Yokohama Rubber Co., Ltd.

Gunze Limited

Kazuto Yamakawa

Jiro Watanabe

Daisuke Kanenari

Yuichi Hara

Hiroyuki Kaido

Noriaki Kuroda

Gou Kawaguchi

Tetsuji Kawazura

Osamu Ozawa

Koji Sato

Hidekazu Takeyama

Shigeru Yamauchi

Kazuo Suga

Hideo Nemoto

Yuusuke Matsuya

Masahiro Ikawa

Riichiro Mama

Hideyuki Oishi

Susumu Hatanaka

Yasuaki Shinoda

Akira Sato

Yoshiaki Hashimura

Gang Hou

Yoshihiro Soeda

Shusaku Tomoi

Naoya Amino

Yoshihiro Kameda

Zenichiro Shida

Hiroshi Shintani

Hiroyuki Wakamatsu

Hiroaki Shibano

Ikuma Yusa

Takeo Masaki

Nobuaki Kuribayashi

Peng Gong

Naoto Torii

Akitomo Sato

Katsuhiro Tanaka

Shogo Katsuki

Naoshi Yamaguchi

Tetuji Kawazura

Mie Okura

Ryuhei Suzuki

Yuki Mizutani

Tomohide Saita

Provided is a piping system for an air conditioner installed in a vehicle that can achieve appropriate weight reduction while ensuring appropriate pressure resistance as the piping system as a whole. A circulation path that connects component devices of an air conditioner () in an annular shape to circulate a refrigerant (C) is formed by each pipe body extending between the component devices. At least one of the pipe bodies includes: a resin hose () embedded with a non-metal reinforcing material () or a resin pipe () embedded with a non-metal reinforcing material (), and the resin pipe bodies (), () are employed in 50% or more of a total length of each of the pipe bodies constituting the circulation path.

Piping system for air conditioner installed in vehicle

A pneumatic tire using as a tread part, a rubber composition containing a high silica-content rubber composition having a difference F-S between an amount of filler F and an amount of a softening agent S of 60 to 90 parts by weight and having a durometer hardness measured at 20&#xb0; C. of 65 to 76.

Pneumatic tire

A rubber laminate comprises a reinforcing layer and a second rubber layer laminated sequentially on a first rubber layer, at least one outer surface of the first rubber layer and the second rubber layer being covered with an ultra high molecular weight polyethylene layer, wherein the rubber layers covered with the ultra high molecular weight polyethylene layer are formed from a rubber composition comprising from 20 to 40 parts by mass of a softener per 100 parts by mass of a mixed rubber consisting of from 60 to 80% by mass ratio of a diene rubber and 20 to 40% by mass ratio of a ethylene-propylene-diene rubber and/or a butyl rubber.

Rubber laminate

A hose for transporting refrigerant includes an inner tube layer having a gas barrier layer and a rubber layer adjacent to the outer surface of the gas barrier layer. The gas barrier layer is formed using a thermoplastic resin composition comprising a polyamide resin and a modified rubber having an acid anhydride group or an epoxy group, the modified rubber being obtained by modifying a modified raw rubber having an acid anhydride group or an epoxy group with a hydrogen bond-forming compound having a functional group which reacts with the acid anhydride group or the epoxy group and a functional group which is able to form a hydrogen bond with an amide bond or a hydroxyl group. The rubber layer is formed using a rubber composition comprising from 1 to 15 parts by mass of an alkylphenol-formaldehyde resin per 100 parts by mass of a raw rubber.

Hose for transporting refrigerant

A bonded bodyof a carbon film covered article and a rubber is formed by bonding a carbon film covered articlehaving a carbon filmformed on a surface of an articleto an unvulcanized rubberby affixing and vulcanizing. Thereby, a bonded body of rubber and, for example, metal can be provided without the need for an adhesive.

Bonded body of a carbon thin film covered article and a rubber

A hose for transporting refrigerant of the present technology includes an inner tube layer having a gas barrier layer and a rubber layer adjacent to an outer surface of the gas barrier layer. The gas barrier layer includes a polyamide resin composition obtained by blending from 0.5 to 20 parts by mass of a hydrotalcite per 100 parts by mass of a modified polyamide obtained by blending a polyamide and a carboxyl group-containing modified polyolefin. The rubber layer includes a rubber composition obtained by compounding from 1 to 15 parts by mass of an alkylphenol-formaldehyde resin per 100 parts by mass of a raw rubber. The raw rubber is at least one selected from the group consisting of a BIMS and a butyl rubber and/or a halogenated butyl rubber, which is a copolymer rubber.

A hose for refrigerant transport use comprising an inner layer with superior deterioration resistance performance. The innermost layer comprised in the hose for refrigerant transport use of the present invention is formed using a polyamide resin composition comprising a polyamide and, per 100 parts by mass thereof, from 0.5 to 20 parts by mass of an acid acceptor.

Hose for refrigerant transport use

A hose for transporting refrigerant of this invention is a hose comprising an inner tube layer including a gas barrier layer and a rubber layer adjacent to an outer surface of the gas barrier layer. The rubber layer comprises a rubber composition comprising from 1 to 15 parts by mass of an alkylphenol-formaldehyde resin and from 1 to 8 parts by mass of a hydrotalcite per 100 parts by mass of a raw rubber. The raw rubber comprises at least one selected from the group consisting of a BIMS and a butyl rubber and/or a halogenated butyl rubber, which is a copolymer rubber. The gas barrier layer comprises a polyamide resin composition comprising a modified polyamide obtained by blending a polyamide and a carboxyl group-containing modified polyolefin. The hose for transporting refrigerant of this invention has superior adhesion between the gas barrier layer and the rubber layer.

An object of the present invention is to provide a hose which has a gas barrier layer and a rubber layer adhered without using an adhesive, and which has a dramatically improved durability compared to the conventional hose. The hose of the present invention is a refrigerant hose having an inner layer comprising a gas barrier layer and a rubber layer adhered to the outer surface of the gas barrier layer. The gas barrier layer comprises a modified polyamide prepared by blending a polyamide and a carboxyl group-containing modified polyolefin, and the rubber layer comprises a rubber composition prepared by blending a particular amount of an alkylphenol formaldehyde resin and a particular amount of carbon black with a raw rubber. The raw rubber comprises a BIMS, a copolymer rubber which is a butyl rubber and/or a halogenated butyl rubber, and an EPDM, the carbon black is specified, and no adhesive layer is formed between the gas barrier layer and the rubber layer.

Refrigerant hose

A thermoplastic resin elastomer/rubber laminate comprising a rubber layer containing 100 parts by weight of a rubber and 0.1-20 parts by weight of an antioxidant preblended thereto and a thermoplastic resin elastomer composition layer, obtained by laminating at least two layers of the rubber layer and the thermoplastic resin elastomer composition layer followed by heating and pressing, whereby the antioxidant migrates from the rubber layer to the thermoplastic resin elastomer composition layer to improve the weathering resistance as well as a pneumatic tire using the same as an inner liner.

Layered thermoplastic-resin-elastomer/rubber product with improved weatherability and pneumatic tire made with the same

A pneumatic tire having a runflat capability provided with a crescent shaped reinforcing rubber layer at the side part thereof, wherein an inner layer is composed of a thermoplastic elastomer composition containing (A) at least one thermoplastic resin having an air permeation coefficient of 100&#xd7;10cc&#xb7;cm/cm&#xb7;sec&#xb7;cmHg or less and a Young's modulus of more than 500 MPa and (B) at least one elastomer ingredient having an air permeation coefficient of 50&#xd7;10cc&#xb7;cm/cm&#xb7;sec&#xb7;cmHg or more and a Young's modulus of 500 MPa or less in amounts of at least 30% by weight based upon the total polymer ingredients and having an air permeation coefficient of 100&#xd7;10cc&#xb7;cm/cm&#xb7;sec&#xb7;cmHg or less.

Pneumatic tire having run flat capability

A thermoplastic elastomer composition dynamically vulcanized to a gelation rate of 50 to 95% which is superior in heat resistance and durability while maintaining flexibility and superior in air permeation preventive property which can be efficiently used as, for example, a pneumatic tire as an air permeation preventive layer. The method includes mixing a composition (C) mixed under conditions of a ratio of melt viscosities of the rubber composition (A)/resin (B) of 0.8 to 1.2 and the formula (&#x3c6;/&#x3c6;)&#xd7;(&#x3b7;/&#x3b7;)&#x3c;1.0 under conditions of a ratio of melt viscosities of the rubber composition (D)/composition (C) of 0.8 to 1.2 and the formula (&#x3c6;/&#x3c6;)&#xd7;(&#x3b7;/&#x3b7;)&#x3c;1.0, wherein &#x3c6;: volume fraction of rubber composition (A), &#x3c6;: volume fraction of resin (B), &#x3b7;: melt viscosity of rubber composition (A), &#x3b7;: melt viscosity of resin (B), &#x3c6;: volume fraction of composition (C), &#x3c6;: volume fraction of rubber composition (D), &#x3b7;: melt viscosity of composition (C), &#x3b7;: melt viscosity of rubber composition (D).

Thermoplastic elastomer composition and process for producing the same and pneumatic tire and hose using the same

A thermoplastic elastomer composition of a structure of a thermoplastic resin (A) in which a rubber composition (B) is dispersed, where the stress at the time of 2.5% elongation of the stress-strain curve of the thermoplastic elastomer composition is 0.1 to 50 MPa and the ratio of the stress (M ) at &minus;20&deg; C. and 200% elongation and the stress (M ) at &minus;20&deg; C. and 100% elongation is 1.0<M /M <2.0, particularly a thermoplastic elastomer composition structured with the polyamide resin of the thermoplastic resin (A) in which the rubber composition (B) is dispersed, includes a polyamide plasticizer (C1) and/or a thermoplastic elastomer (C2), the ratio of composition being (A) 15 to 59% by weight, (B) 40 to 70% by weight (C1&plus;C2), and 1 to 30% by weight and a tire using the same.

Thermoplastic elastomer composition having improved processability and tire using the same

A pneumatic tire comprising a rubber member containing a short fiber (A&prime;) formed by the fibrillation of a short fiber (A) whose cross section takes a sea-island structure essentially composed of at least two polymers.

Pneumatic radial tire reinforced with fibrillated sea-island short polymer fibers

A thermoplastic elastomer composition dynamically vulcanized to a gelation rate of 50 to 95% which is superior in heat resistance and durability while maintaining flexibility and superior in air permeation preventive property which can be efficiently used as, for example, a pneumatic tire as an air permeation preventive layer.

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Hiratsuka, Japan

Kazuto Yamakawa