The Yokohama Rubber Co., Ltd.

Susumu Hatanaka

Gang Hou

Kazuto Yamakawa

Jiro Watanabe

Noriaki Kuroda

Shigeru Yamauchi

Takashi Satoh

Daisuke Irii

Nobuaki Kuribayashi

Tetsuji Kawazura

Osamu Ozawa

Kazunori Ishikawa

Shuji Takahashi

Yuichi Hara

Yoshihiro Soeda

Shusaku Tomoi

Koji Sato

Gou Kawaguchi

Hideyuki Oishi

Hiroshi Shintani

Hiroaki Shibano

Hiroyuki Wakamatsu

Ikuma Yusa

Yuusuke Matsuya

Katuhiro Tanaka

Naoshi Yamaguchi

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

Two molded articles having a cylindrical two-piece split shape is formed by forming two primary cavities in a desired shape with molds assembled together and injecting a molten primary resin into the two primary cavities. An assist material is injected into a secondary cavity into which a molten secondary resin is injected in a state where the two molded articles are located opposed to each other via a space therebetween and internally fitted into one secondary cavity formed by the molds that are assembled together by shifting the positions. A flange portion having any desired shape is disposed on an outer circumferential surface of a resin pipe in a two-layer structure in which an inner surface layer formed of the cured secondary resin is integrated with an outer surface layer formed of the two molded articles. Thus, a portion having any desired shape is easily manufactured on the resin pipe.

Method of manufacturing resin pipe

Provided is a rubber wear testing device including a holding portion for holding a test sample of rubber, and a compression bonding mechanism for applying an additional force oriented to a circular circumferential surface of a rotation body rotating such that the test sample is pressed to the circular circumferential surface at a predetermined fixed position and the movement of the test sample in a direction opposite to the additional force is always allowed.

Rubber wear testing device

Provided is a rubber wear resistance evaluation method including compressing and bonding a test sample of rubber with additional force to a circular circumferential surface of a rotation body rotated by a drive motor at a predetermined fixed position, holding the test sample in a state where movement of the test sample in a direction opposite to the addition force is always allowed, performing a wear test in which the test sample is worn, and using, at the time of evaluating wear resistance, an index based on at least one item out of two items including power required for driving and rotating the drive motor and a temperature of the test sample during the wear test, in addition to an amount of wear of the test sample.

Rubber wear resistance evaluation method

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 thermoplastic elastomer composition which, when used for the inner tube and/or outer cover of a hose, can improve the hose flexibility at an ordinary temperature and low temperature, oil resistance, and cold resistance and can reduce the production costs since it does not require a vulcanization step and a hose having said properties using this elastomer composition for its inner tube and/or outer cover and a process and apparatus for the production thereof.

Thermoplastic elastomer composition, process for the preparation there of, hose made by using the composition, and process for the production thereof

Thermoplastic elastomer composition, hose comprising thermoplastic

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Hiratsuka, Japan

Susumu Hatanaka