Friction transmission belt and process for producing the same

A technique for friction transmission belts and manufacturing methods, applied in transmission belts, waist belts, V-shaped belts, etc., can solve problems such as insufficient adhesion, decreased adhesion, and difficult adhesion, so as to improve adhesion and prevent core wires The effects of collapse and excellent dynamic life

Inactive Publication Date: 2008-04-09
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, ethylene-α-olefin elastomers such as ethylene-propylene-diene rubber (EPDM) are generally difficult to bond, so there is a problem that the resorcinol-formaldehyde aqueous solution-latex adhesive and rubber It is easy to cause a decrease in the adhesion force at the interface between them, so that the adhesion force is insufficient
Also, substances formed by crosslinking the adhesive rubber layer with organic peroxides have not been studied in detail

Method used

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  • Friction transmission belt and process for producing the same
  • Friction transmission belt and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～7

[0129] (handling of core wire)

[0130] Polyethylene terephthalate core wire (PET thread, 1000 denier (denier), / 2×3, final twist (upper burning り) is 9.5T / 10cm (Z), initial twist (lower burning ri) 21.9T / 10cm, manufactured by Teijin Corporation) was immersed in a toluene solution of isocyanate (solid content of isocyanate: 20% by mass), and then heat-dried at 240° C. for 40 seconds to perform pretreatment.

[0131] Next, the thus-pretreated polyethylene terephthalate cord was dipped in the obtained RFL adhesive composition, and heated and dried at 230° C. for 80 seconds to perform an adhesive treatment.

[0132] Then, after dipping the thus-treated polyethylene terephthalate cord into the rubber paste, it was heated and dried at 60° C. for 40 seconds, and the polyethylene terephthalate cord was bonded ( post-processing).

[0133] (Manufacture of friction transmission belt)

[0134] The canvas and the above-mentioned unvulcanized sheet of rubber mixture used for bonding the...

Embodiment 5～6

[0136] Instead of polyethylene terephthalate core wire, use polyethylene naphthalate core wire (PEN wire, 1000 denier, / 2×3, final twist 9.5T / 10cm(Z), initial Twist 21.9T / 10cm, manufactured by Teijin Corporation, Example 5), aramid core wire (aramid thread, 1000 denier, / 2×3, final twist 9.5T / 10cm(Z), The initial twist is 21.9T / 10cm, manufactured by Teijin Corporation, Example 6), except that, in the same manner as in Example 1, the processing of the core wire and the production of the friction transmission belt were carried out.

[0137] [evaluate]

[0138] Adhesion test and conveyor belt running test were carried out by the following methods, and the peel adhesion and failure mode in the adhesion test and the peeling length after belt running in the conveyor belt running test were evaluated. The results are shown in Table 5.

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PUM

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Abstract

A friction transmission belt that excels in not only repeated flexures of friction transmission belt and adhesion performance, such as heat resisting adhesion and dynamic adhesion, in run under heating conditions around engine but also desirable performance, such as heat resistance, abrasion resistance or abnormal noise prevention. There is provided a friction transmission belt comprising an adhesive rubber layer having core wires buried therein along the longitudinal direction of the belt and, piled thereon, a compression rubber layer, wherein the adhesive rubber layer is one formed by crosslinking an ethylene-a-olefin elastomer composition in the presence of an organic peroxide, and wherein the compression rubber layer is one formed by crosslinking an ethylene-a-olefin elastomer composition, and wherein the core wires are those having undergone adhesion treatment with the use of a resorcin-formaldehyde-latex adhesive composition containing a 2,3-dichlorobutadiene containing polymer latex.

Description

technical field [0001] The present invention relates to a friction transmission belt and a method of manufacturing the same. Background technique [0002] Friction transmission belts generally have a compression rubber layer and an adhesive rubber layer in which fiber core wires are bonded and embedded, and bonded on the entire circumference including the upper surface, lower surface or side surfaces of the belt as required Rubber-lined canvas, this type of friction transmission belt is widely used. Conventionally, for such friction transmission belts, chloroprene rubber, hydrogenated nitrile rubber, and chlorosulfonated polyethylene rubber are usually used for the compression rubber layer. However, in recent years, from the viewpoint of environmental protection, it is required to The raw material rubber is dechlorinated, so ethylene-α-olefin elastomers such as ethylene-propylene-diene rubber (EPDM) have been used for both the compression rubber layer and the adhesive rubbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16G1/08B29D29/00C08L23/16F16G5/06F16G5/20
CPCB29D29/08F16G5/20F16G5/06F16G1/08Y10T428/31909
Inventor 大野公睦
Owner BANDO CHEM IND LTD
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