Composition for cord coating, cord for rubber reinforcement made with the same, and rubber product made with the same

A composition and rubber technology, which is applied in the field of rubber products, can solve the problems of reduced bending fatigue resistance, and achieve the effects of high bending fatigue resistance, bending fatigue resistance, high and high dimensional stability

Active Publication Date: 2007-03-28
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a high-temperature environment, since the polymer is cured due to thermal deterioration, bending fatigue resistance may decrease

Method used

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  • Composition for cord coating, cord for rubber reinforcement made with the same, and rubber product made with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0074] Filaments of alkali-free glass with a diameter of 9 μm were spun and bundled with a sizing agent to obtain glass fibers of 33.7 tex. Three of these glass fibers were fused, impregnated with the covering composition (solid content: 30% by mass) shown in Table 1, and heat-treated to obtain a glass fiber cord. In addition, the covering composition contains ammonia water (NH 4 OH) and water as solvent. The coating amount of the coating composition was adjusted so that the mass of the film formed therefrom was 20% of the mass of the glass fibers. Table 1 below shows the compounding quantity (parts by mass) of the composition, and also shows the mass ratio (mass %) of the solid content.

[0075] [Table 1]

[0076] Element

[0077] Next, the glass fiber cord was initially twisted at a ratio of 2.0 times / 25 mm. Next, 11 glass fiber cords that were initially twisted were bundled, and the final twist was performed at a ratio of 2.0 times / 25 mm. In this manner, the...

Embodiment 6

[0079] The second coating composition (liquid) having the composition shown in Table 2 was further applied to the rubber-reinforced cord obtained in Example 1, and dried to obtain the rubber-reinforced cord of Example 6. In addition, the covering amount (solid content) of the second covering composition with respect to the reinforcing cord was 5% by mass.

[0080] [Table 2]

[0081] Element

Mixing ratio (parts by mass)

Methylene bis(4-phenylisocyanate)

4.5

CSM

5.25

p-Dinitrosobenzene

2.25

carbon black

3.0

Mixed solvent of xylene and trichlorethylene

(mixing ratio (mass ratio) of xylene to trichloroethylene=1.5:1.0)

85.0

[0082] (characteristic evaluation)

[0083] Two matrix rubber sheets (width 10 mm, length 300 mm, thickness 1 mm) formed by the combination shown in Table 3 below were prepared. One reinforcing cord of the example with a length of 300 mm was arranged on one...

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PUM

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Abstract

A composition for cord coating of the present invention comprises a latex of a first rubber, a phenol resin, and a water-soluble condensation product of resorcinol-formaldehyde so that a ratio of the first rubber to a solid content of the composition, a ratio of the phenol resin thereto, and a ratio of the water-soluble condensation product thereto are 30 to 95 wt.%, 0.01 to 30 wt.%, and 2 to 15 wt.%, respectively, wherein the first rubber is a nitrile group-containing highly saturated polymer rubber having an iodine value of 120 or less, and the above-described water-soluble condensation product is a novolac-type condensation product.

Description

technical field [0001] The present invention relates to a composition for covering a cord, a cord for rubber reinforcement using the composition, and a rubber product using the cord. Background technique [0002] As a reinforcing material for rubber products such as rubber belts, cords using reinforcing fibers such as glass fibers and aramid are used. In addition, in order to maintain proper timing, a toothed belt used for driving a camshaft of an internal combustion engine of an automobile is required to have high dimensional stability. Furthermore, in recent years, not only in camshaft driving, but also in applications where high loads are applied, such as driving of injection pumps and power transmission of industrial equipment, high strength and high elastic force are required. [0003] When these rubber products are repeatedly subjected to bending stress, bending fatigue may occur, resulting in poor performance, and peeling may occur between the reinforcing material an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/41C08L9/04C08L61/04D02G3/48D06M15/693D07B1/16D06M101/00D06M101/36D06M101/40C08L15/00C08L61/06C08L61/12C09D115/00
CPCC08L61/06C08L61/12D06M15/693D06M15/412D06M2101/36C08J2321/00C08L15/005C08L2205/03C08J5/06C09D115/005D21H19/14C08L2205/02D06M2101/40Y10T428/31931C08L2666/14
Inventor 梶原启介水越直哉
Owner NIPPON SHEET GLASS CO LTD
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