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Aramid core wire, method for manufacturing same, treatment agent, and transmission belt

A technology of polyamide core wire and manufacturing method, which is applied in the field of transmission belts, can solve the problems of complex belt forming, reduced adhesiveness between canvas and rubber layers, and reduced workability, and achieves excellent adhesiveness, excellent forming workability, and prevention of The effect of fraying

Active Publication Date: 2016-03-09
MITSUBOSHI BELTING LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such fraying before vulcanization reduces workability in belt forming, and may cause more severe fraying in the scraping process.
Therefore, depending on the situation, another process of cutting the frayed part may be required, which may complicate the formation of the tape.
In addition, such fraying of the core thread also causes a decrease in the adhesiveness between the canvas and the rubber layer (belt body).

Method used

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  • Aramid core wire, method for manufacturing same, treatment agent, and transmission belt
  • Aramid core wire, method for manufacturing same, treatment agent, and transmission belt
  • Aramid core wire, method for manufacturing same, treatment agent, and transmission belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～3

[0188] The immersion treatment is carried out by passing the aramid fiber rope (twisted yarn) through various first treatment liquids (any one of A to I) shown in Table 1 for 10 seconds, at 180° C., 4 Minutes for drying.

[0189] The aramid fiber rope treated with the first treatment liquid is immersed in the second treatment liquid and then dried. The immersion conditions and drying conditions are the same as in the case of the first treatment liquid.

[0190] The aramid fiber rope treated with the second treatment liquid was dipped in the third treatment liquid for 3 seconds, and dried at 170°C for 1.5 minutes to obtain an aramid fiber rope. Wire.

[0191] For each of the obtained aramid cords, a peel test, a bending fatigue test, and a fray test were performed. The results are shown in Table 4.

[0192] [Table 4]

[0193]

[0194] As can be seen from the results in Table 4, the combination of the rubber-modified epoxy resin and the aromatic epoxy resin in the first ...

Embodiment 7～12 and comparative example 4～6

[0198] In the preparation of the aramid fiber rope, the aramid fiber monofilaments (precursor yarns) before primary twisting were dipped and dried in the same manner as in Example 1 using various first treatment liquids. For the obtained aramid fiber monofilaments (a bundle of aramid fiber filaments obtained by untwisting and forming a ribbon), the initial twist was performed under the condition that the initial twist was 10.5 times / 10cm. Twist (S twist), three of the primary twist yarns are bundled, and the final twist (Z twist) is carried out in the direction opposite to the primary twist under the condition that the final twist is 10.6 times / 10cm, and an aramid fiber rope is produced.

[0199] Then, the aramid fiber rope was treated with the second treatment liquid and the third treatment liquid in the same manner as in Example 1 to obtain an aramid cord.

[0200] For each of the obtained aramid cords, a peel test, a bending fatigue test, and a fray test were performed. Th...

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Abstract

The present invention pertains to a method for manufacturing an aramid core wire, the method including at least a first processing step in which an unprocessed yarn of aramid core wire is processed using a first treatment agent containing a rubber-modified epoxy resin and a rubber-unmodified epoxy resin, as well as to an aramid core wire obtained thereby, a transmission belt using the aramid core wire, and the treatment agent.

Description

technical field [0001] The present invention relates to a core wire used in a transmission belt, a manufacturing method thereof, a treatment agent, and a transmission belt comprising the above core wire. Background technique [0002] There are various types of transmission belts, but they are generally belts having a vulcanized rubber layer in which a core wire is embedded. As such core wires, glass core wires, polyester core wires, aramid core wires, etc. are widely used, and among them, aramid core wires are suitable from the standpoint of both strength and elasticity. [0003] However, even such an aramid cord is stiffer than a polyester cord and the like, and fraying of the cord tends to occur from the vulcanized rubber layer. Such fraying occurs not only at the cut surface of the tape, but also due to the protruding of the core wire and the monofilament constituting the core wire as the tape runs. Therefore, a method of preventing such fraying of the core wire has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55D06M15/00D06M15/41D06M15/693F16G5/06D06M101/36
CPCD06M15/55D06M15/693F16G1/10F16G5/08D06M2200/35D06M2200/50D06M2101/36D06M15/41D06M13/127D06M13/148
Inventor 松本英之西村年弘
Owner MITSUBOSHI BELTING LTD