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Reinforcing cord, method for producing the same, and product using the reinforcing cord

A manufacturing method and coating technology, which are used in rubber products, reinforcement ropes for rubber and their manufacturing fields, can solve fiber fatigue for reinforcement, damage to the coating, lack of heat resistance or creep resistance (shape). Stability coating and other issues, to achieve good water resistance and oil resistance, improve water and oil resistance effect

Inactive Publication Date: 2009-06-17
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these products are used for a long time, the reinforcing fiber will fatigue due to bending and the strength will decrease
In addition, it is also known that the layer covered with reinforcing fibers (covering layer) swells due to the penetration of water or oil into the product, and the twisting of the fiber bundle is loosened, resulting in accelerated strength reduction, etc.
[0009] However, as mentioned above, when the rubber layer (covering layer) is formed on the surface of the reinforcing fiber by extruding the material, it is impossible to obtain a material having sufficient heat resistance or creep resistance (shape stability). Covering layer, so in the long-term actual use, there are also problems that the covering layer is damaged, and water or oil will immerse into the inside of the rope
In addition, in the case of forming the covering layer (rubber layer) by this method, it is difficult to form a uniform and thin layer, and there is also a problem that the outer shape of the reinforcing rope becomes larger.

Method used

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  • Reinforcing cord, method for producing the same, and product using the reinforcing cord
  • Reinforcing cord, method for producing the same, and product using the reinforcing cord
  • Reinforcing cord, method for producing the same, and product using the reinforcing cord

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] In Example 1, three glass fibers (200 filaments with an average diameter of 9 μm in E glass composition) were paralleled, immersed in a water tank filled with the water-based treatment agent shown in Table 1 below, and salvaged. This was dried for 1 minute in a drying oven set at 150° C. to form a base covering layer, which was produced into reinforcing fibers.

[0082] [Table 1]

[0083] Composition of water-based treatment agent ratio H-NBR (solid content mass ratio 40%) ( * 1) 100 quality Resorcinol-formaldehyde condensate 10 quality

[0084] ( * 1) Hydrogenated nitrile rubber latex (ZETPOL LATEX, manufactured by Japan Zeon Co., Ltd.)

[0085] The glass fibers were subjected to primary twisting 8 times / 10 cm, and 11 of the primary twisted materials were paralleled, and double twisting was performed 8 times / 10 cm to prepare a fiber bundle for reinforcement. The adhesion rate of the base covering layer was 20% by mass relative to the m...

Embodiment 2

[0107] The reinforcing rope of Example 2 is configured such that the base covering layer in the reinforcing rope of Example 1 is omitted (the base covering layer is not provided). However, the other configurations are the same as those of the reinforcement rope of Example 1, and it is produced by the same method. In addition, as a product reinforced with the reinforcing cord of Example 2, a flat transmission belt was manufactured in the same manner as in Example 1.

[0108] The same bending test and immersion test as in the case of Example 1 were performed on the flat transmission belt using the reinforcing cord of Example 2. The results are shown in Table 3 below.

Embodiment 3、4 and comparative example 4

[0121] The reinforcing cords in Examples 3, 4, and Comparative Example 4 were manufactured in the same manner as in Examples 1, 2, and Comparative Example 1, respectively, omitting the overcoat layer and other configurations. In addition, in the reinforcing cord of Example 5, the covering layer was produced using THVX815G manufactured by Sumitomo 3M Corporation, which is a fluororesin-based thermoplastic elastomer. For these reinforcement ropes, water absorption and oil absorption were measured in the same manner as in Example 1. The results are shown in Table 4.

[0122] [Table 4]

[0123]

[0124] ( * 5) Mixture of water-soluble hydrogenated nitrile rubber (H-NBR) and resorcinol-formaldehyde (RF) condensate

[0125] From the results shown in Table 4, it can be seen that even when a fluororesin-based thermoplastic elastomer is used for the cover layer, water absorption and oil absorption can be achieved to the same extent as when a polyester-based thermoplastic elastome...

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Abstract

Disclosed is a method for producing a reinforcing cord (2) wherein a coating layer is provided on the surface of a reinforcing fiber bundle (21) which comprises a plurality of reinforcing fibers. This method comprises a step for forming a coating layer on the surface of the reinforcing fiber bundle (21) by extrusion molding by using a material containing at least one elastomer selected from polyester thermoplastic elastomers and fluororesin thermoplastic elastomers. Also disclosed is a reinforcing cord (2) produced by this method.

Description

technical field [0001] The present invention relates to a cord for reinforcement, its manufacturing method and a product reinforced by using the cord for reinforcement, in particular to a cord for reinforcement for rubber, its manufacturing method, and a product reinforced by using the cord for reinforcement rubber products. Background technique [0002] For products such as toothed rubber belts, in order to improve their strength and durability, it is widely used to embed glass fibers, chemical fibers, etc. as reinforcing fibers in the matrix. However, when these products are used for a long period of time, the reinforcing fibers are fatigued by bending and their strength decreases. In addition, problems such as swelling of the layer covered with reinforcing fibers (covering layer) due to infiltration of water or oil into the product, untwisting of the fiber bundle, and accelerated strength reduction are also known. [0003] Therefore, various attempts have been made to i...

Claims

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Application Information

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IPC IPC(8): D06M15/507D06M15/693B29C47/02F16G1/28D02G3/48D02G3/36D06M15/227D06M15/41B29K19/00B29K67/00B29L9/00B29C48/06B29C48/08
CPCB29C47/28B29C70/523B29K2105/10C03C25/305D02G3/447D02G3/404B29L2029/00B29K2221/003B60C9/0042B29K2067/00B29B15/122C03C25/18B29C47/025B29C47/0014C03C25/50B29K2021/00B29D29/08B29K2027/12D06M15/693C03C25/1015D01D11/06C03C25/323C03C25/27B29C48/05B29C48/154B29C48/34B29C48/08B29C48/06
Inventor 今西秀树
Owner NIPPON SHEET GLASS CO LTD
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