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Reinforcing cord for reinforcing rubber and rubber product using the same

A technology for reinforcing rubber and cords, applied in the field of reinforcing cords for reinforcing rubber and rubber products using the cords, which can solve problems such as low bending resistance, difficulty in obtaining strength and bending resistance, and reduced strength , to achieve excellent durability, high bending fatigue resistance, and high dimensional stability

Inactive Publication Date: 2006-05-10
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to achieve a balance between strength and bending resistance in conventional reinforcing materials that use a single type of reinforcing fiber
For example, a reinforcing cord using carbon fiber as a reinforcing fiber has high strength and high elasticity, but has low bending resistance, and bending tends to cause a decrease in strength.

Method used

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  • Reinforcing cord for reinforcing rubber and rubber product using the same
  • Reinforcing cord for reinforcing rubber and rubber product using the same
  • Reinforcing cord for reinforcing rubber and rubber product using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] After the RFL treatment liquid was impregnated into the carbon fiber strands, heat treatment (180° C. for 120 seconds) was performed to dry them. Thus, a coated carbon fiber strand (20% by weight of the coating) was produced. Carbon fiber strands (400tex, outer diameter of about 0.76mm, modulus of elasticity of 235GPa, density of about 1.76g / cm2) were used as carbon fiber strands in bundles of 6,000 carbon fiber filaments (7.0μm in diameter). 3 , Untwisted product, manufactured by Toho Tenacus Co., Ltd.). In addition, a solution (8% by weight of solid content) of resorcinol-formalin condensate, vinylpyridine-styrene-butanediene was mixed at a solid content weight ratio of 2:13:6 for the RFL treatment liquid. A mixture of ethylene latex (solid content: 40% by weight) and chlorosulfonated polyethylene rubber dispersion (solid content: 40% by weight).

[0052] In addition, prepare a coated glass fiber strand (about 100 tex, an outer diameter of about 0.35 mm, a modulus o...

Embodiment 2

[0061] First, as in Example 1, a carbon fiber strand provided with a film was produced, and primary twist (2.0 times / 25 mm) was applied in the S direction. A first cord (diameter: 1.18 mm) was produced in the same manner as in Example 1 except that the carbon fiber strands thus obtained were used. The count of the first cord is 1770tex, that is, the weight per 1000m of length is 1770g.

[0062] Next, as in Example 1, a protective layer was formed on the surface of the first cord. In this way, the second cord provided with the protective layer is obtained. The weight of the protective layer was 5% by weight of the first cord. About this 2nd cord, it evaluated similarly to Example 1. In addition, a sample for a bending test was prepared in the same manner as in Example 1, and a bending test was performed.

[0063] As a result, the initial tensile strength per one cord was 1080 N / cord. The elongation at break was 2.1%. The tensile load per cord at 0.4% elongation is 200N / co...

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Abstract

The reinforcing cord of the present invention is a reinforcing cord for reinforcing rubber, and includes a carbon fiber strand (11) and a plurality of glass fiber strands (12) arranged around the carbon fiber strand (11). According to the present invention, a reinforcing cord having sufficient tensile strength to reinforce rubber products and having high dimensional stability and bending fatigue resistance can be obtained.

Description

technical field [0001] This aspect relates to a reinforcing cord for reinforcing rubber and a rubber product using the same. Background technique [0002] As a reinforcing material for rubber products called rubber belts or tires, reinforcing fibers called glass fibers or aramid fibers are used. However, since these rubber products are repeatedly subjected to bending stress, bending fatigue easily causes performance degradation. As a result, peeling between the reinforcing fibers and the rubber matrix tends to occur, and the reinforcing fibers tend to be abraded to cause a decrease in strength. For this reason, these reinforcing fibers for rubber products are required to have high bending fatigue resistance. [0003] On the other hand, in a timing belt used for a camshaft drive of an internal combustion engine of an automobile, etc., high dimensional stability is required in order to maintain proper synchronization. In addition, rubber belts used for auxiliary drives of j...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B5/00D02G3/18D02G3/48F16G1/28
CPCD02G3/187D02G3/48F16G1/28Y10T428/2933Y10T428/2964Y10T428/2936D07B5/00
Inventor 秋山光晴梶原启介
Owner NIPPON SHEET GLASS CO LTD
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