Tokai Rubber Industries, Ltd.

Tetsuya Arima

Ayumu Ikemoto

Norihiko Furuta

Eiichi Daikai

Shinobu Kanbe

Koji Akiyoshi

Noriaki Imaeda

A refrigerant transportation hose having excellent processability and durability, as well as high resistance to gas permeation (gas barrier properties) and adequate flexibility. The refrigerant transportation hose containing a tubular rubber layer in which refrigerant is circulated, the tubular rubber layer is formed by a material consisting essentially of components (A) to (C): (A) at least one rubber of butyl rubber and halogenated butyl rubber; (B) polybutene; and (C) a white filler.

Refrigerant transportation hose

A vibration absorbing hose has a corrugated portion extending substantially entire part of the hose and end portions of straight cylindrical shape. The vibration absorbing hose has multi-layered construction of tubular inner rubber layer, pressure resistant reinforcement layer circumscribing an outer side of the inner rubber layer and outer rubber layer as outermost cover layer. The pressure resistant reinforcement layer is formed, for example, by braiding reinforcing yarns, so as to have corrugations along the corrugated portion of the inner rubber layer.

Vibration absorbing hose

A vibration absorbing hose including a corrugated portion has multi-layered construction of tubular inner rubber layer, pressure resistant reinforcement layer formed on an outer side of the inner rubber layer by providing reinforcing yarns. A radial depth B of the pressure resistant reinforcement layer at a position of each of corrugation valleys of the rubber layer has such relationship with respect to a corrugation valley depth A of the rubber layer as 0&#x3c; or =B&#x3c; or =0.7&#xd7;A, and an opening angle &#x3b8; of each of the corrugation valleys of the rubber layer satisfies &#x3b8;&#x3c; or =100&#xb0;.

A vibration absorbing hose including a corrugated portion has multi-layered construction of tubular inner rubber layer, pressure resistant reinforcement layer circumscribing an outer side of the inner rubber layer and outer rubber layer as outermost cover layer. The pressure resistant reinforcement layer is formed, for example, by providing reinforcing yarns, so as to have corrugations along the corrugated portion of the inner rubber layer. The inner rubber layer contains scaly filler in an amount of 50 phr to 200 phr so as to be oriented in a stretching direction of the inner rubber layer. The scaly filler has an aspect ratio of 2 to 90.

A vibration absorbing hose excellent in vibration absorbing property, mounting stability and shape retaining property. The vibration absorbing hose comprises at least one rubber layer composed of a rubber composition having a storage elastic modulus (E') of 20 to 100 MPa at 200 Hz with an elongation strain of 0.1% at an ordinary temperature (about 20&#xb0; C.), and a damping factor (tan &#x3b4;) of not lower than 0.4.

A vibration absorbing rubber hose having a laminar structure including an inner rubber layer, a reinforcing layer, and an outer rubber layer, which layers are laminated integrally with one another in the order of description in a radially outward direction of the rubber hose, wherein the inner rubber layer is formed of a butyl rubber material and/or a halogenated butyl rubber material while the outer rubber layer is formed of an EPM material consisting of ethylene-propylene copolymer.

Vibration absorbing rubber hose

A high pressure hose for refrigerant made up of

Growing community of inventors

Kasugai, Japan

Tetsuya Arima