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Driving belt

A transmission belt and rubber layer technology, applied in the field of transmission belts, can solve the problems of reduced adhesion, difficulty in bonding, heat resistance, wear resistance and insufficient abnormal noise prevention, etc., to achieve abnormal noise prevention and excellent heat resistance sexual effect

Active Publication Date: 2007-10-17
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these transmission belts have problems in that they are insufficient in terms of dynamic adhesion, thermal adhesion resistance, heat resistance, abrasion resistance, and abnormal noise prevention.
[0007] However, since the main chain of ethylene-propylene-diene-based rubber (EPDM) does not have double bonds, it is less polar and less reactive, making it difficult to bond during normal mixing
Therefore, at the interface of resorcinol-formaldehyde aqueous solution-latex adhesive and rubber layer, the problem of reduced adhesion is likely to occur
In addition, heat resistance, wear resistance, and abnormal noise prevention may not be sufficient

Method used

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Examples

Experimental program
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Effect test

Embodiment 1～12

[0065] (Examples 1-12, Comparative Examples 1-4)

[0066] Manufacture of adhesive and compression rubber layers

[0067] Adhesive rubber layers were prepared from the rubber mixtures shown in Table 1, and after kneading with a Banbury mixer, they were calendered with calender rolls to prepare rubber mixture unvulcanized sheets for the adhesive rubber layers. A compression rubber layer was prepared from the rubber mixture shown in Table 2, and an unvulcanized sheet of the rubber mixture for the compression rubber layer was similarly prepared. In addition, the commercially available items used are as follows.

[0068] Ethylene-propylene-diene rubber (EPDM):

[0069] "X-3012P" (diene content 3.5 mass%, ethylene content 72 mass%, propylene content 24.5 mass%, Mooney viscosity ML 1+4(100°C) is 15, manufactured by Mitsui Chemicals),

[0070] "3085" (diene content of 4.5% by mass, ethylene content of 62% by mass, propylene content of 33.5% by mass, Mooney viscosity ML 1+4 (100°C...

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Abstract

This invention provides a driving belt which is excellent in dynamic adhesion and heat resistant adhesion during driving upon repeated flexing and upon heating around an engine, as well as in heat resistance, abrasion resistance, and abnormal noise preventive properties. The driving belt comprises an adhesive rubber layer comprises core wires buried along the longitudinal direction of the belt and a compressive rubber layer stacked on the inner side of the adhesive rubber layer. The adhesive rubber layer and the compressive rubber layer have been vulcanization-bonded to each other. The adhesive rubber layer and the compressive rubber layer are formed of an ethylene-a-olefin-diene rubber blend. The diene content of the ethylene-a-olefin-diene rubber in the adhesive rubber layer is not less than the diene content of the ethylene-a-olefin-diene rubber in the compressive rubber layer. The diene content of the ethylene-a-olefin-diene rubber in the adhesive rubber layer is 3.5 to 10% by mass, and the diene content of the ethylene-a-olefin-diene rubber in the compressive rubber layer is 0 to 6% by mass.

Description

technical field [0001] The present invention relates to transmission belts. Background technique [0002] Generally, a power transmission belt has a compression rubber layer and an adhesive rubber layer in which fiber core wires are bonded and embedded, and rubber is bonded to the entire circumference including the upper surface, lower surface, or side surfaces of the belt as required. Lined canvas. For such transmission belts, chloroprene rubber, or a mixture of hydrogenated nitrile rubber and chlorosulfonated polyethylene rubber is usually used in the compression rubber layer. However, in recent years, from the perspective of environmental protection, it is required to use Therefore, attempts to use ethylene-α-olefin-diene rubber such as ethylene-propylene-diene rubber (EPDM) have been attempted for both the compression rubber layer and the adhesive rubber layer. [0003] In Patent Document 1, a transmission belt for power transmission is disclosed by using, as an adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16G1/08F16G5/06F16G5/20
CPCF16G5/06F16G1/08F16G5/20
Inventor 吉田裕彦橘博之尻池宽之
Owner BANDO CHEM IND LTD
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