toothed belt

A toothed belt, thermoplastic elastomer technology, applied in transmission belts, belts/chains/gears, mechanical equipment, etc., can solve the problems of insufficient durability, cracks, belt body wear, etc., and achieve excellent durability and wear resistance. Excellent properties and excellent flex fatigue resistance

Inactive Publication Date: 2016-03-23
NITTA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when a toothed belt having a belt body formed of a conventional thermoplastic polyurethane elastomer is used as a belt for high-load power transmission, etc., there may be cases where the belt body wears out at an early stage, or cracks occur, and the belt insufficient durability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107]100 parts by weight of TPU-1 and 10 parts by weight of MAH-EPDM were kneaded using a twin-screw extruder (manufactured by Technovel, trade name "KZW20TW-30"). The extruder was set at a cylinder temperature of 200° C. (in which, the feed portion was 160° C.), and the screw rotation speed was set at 300 rpm, the above-mentioned resin was melt-kneaded, and pellets were produced by a pelletizer. The obtained pellets were injection molded using an injection molding machine (manufactured by Nissei Plastic Industry Co., Ltd., trade name "NEX110-18E"), and test pieces [100mm×100mm×thickness 2mm (for abrasion test), 120mm×10mm×thickness 4mm ( Demesia flex test)].

Embodiment 2

[0111] Except having changed the raw material resin into 100 weight part of TPU-2 and 10 weight part of MAH-EPDM, it carried out similarly to Example 1, and produced the pellet and the test piece.

Embodiment 3

[0115] Except having changed the raw material resin into 100 weight part of TPU-3, and 5 weight part of MAH-EPDM, it carried out similarly to Example 1, and produced the pellet and the test piece.

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Abstract

The present invention provides a toothed belt characterized in that all or part of the belt body is made of modified ethylene-propylene-diene copolymerized with thermoplastic polyurethane (A) and modified with unsaturated carboxylic acid or its derivatives. The thermoplastic elastomer alloy of rubber (B) is formed. The weight ratio [(B) / (A)] of the modified ethylene-propylene-diene copolymer rubber (B) modified with an unsaturated carboxylic acid or its derivatives to the thermoplastic polyurethane (A) is preferably 0.1 / 99.9~30 / 70. According to the toothed belt of the present invention, even if it is used under a high load for a long period of time, abrasion, scratches, cracks, breakage, etc. are hardly generated on the belt main body, and the durability is extremely excellent.

Description

technical field [0001] The present invention relates to a toothed belt that can be used for power transmission, transportation, etc., and more specifically, relates to a toothed belt in which all or part of a belt body is formed of a thermoplastic elastomer alloy. Background technique [0002] Unlike flat belts or V-belts that transmit rotational force only by friction, toothed belts are belts that can transmit rotation without slipping by meshing with the teeth provided on the pulleys. Therefore, the toothed belt has been widely used as a belt for high-load or synchronous power transmission, and a belt for precision conveyance. [0003] A toothed belt is usually composed of a belt body and a tensile body provided as required. Also, it is known that the belt body is formed from a thermoplastic elastomer. For example, Japanese Patent Application Laid-Open No. 2004-224848 discloses a toothed belt in which a tooth rubber layer and a back rubber layer are formed using a polyur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16G1/28C08L23/26C08L75/04
CPCC08L51/06C08L75/06C08L75/08F16G1/10F16G1/28C08L23/26C08L75/04
Inventor 笠崎敏明吉田隆彦清水将司上垣真介大西阳子中村晴彦井上龙起
Owner NITTA CORP
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