Cord for rubber reinforcement, process for producing the same, and rubber product made with the same
A technology of rubber reinforcement and manufacturing method, which is applied in the field of rubber products reinforced with soft wires for rubber reinforcement, can solve the problems of high manufacturing cost and complicated covering layer forming process, and achieves improved adhesiveness, low cost, easy heat resistance and high temperature resistance. Flexural fatigue resistance, the effect of improving the operating environment
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Embodiment approach 1
[0014] Embodiment 1 will describe the cord for rubber reinforcement of the present invention and its manufacturing method. A coating solution (water-based adhesive) containing latex and a vulcanization aid is coated on reinforcing fibers by the method of the present invention. 50 mass % or more of the solvent (liquid component) of this coating liquid is water. Subsequently, by drying and curing the coating liquid, a covering film is formed on the reinforcing fibers.
[0015] The reinforcing fibers used in the present invention are embedded in the matrix rubber, and there are no particular limitations on the type or shape of the fibers as long as they improve their shape stability or strength. As the reinforcing fiber, for example, polyvinyl alcohol fiber represented by glass fiber and vinylon fiber, polyester fiber, polyamide fiber called nylon or aramid (aramid), carbon fiber, or polyparaffin fiber can be used. Phenylbenzoxazole fibers, etc. Among them, glass fibers excell...
Embodiment approach 2
[0031] In Embodiment 2, the rubber product of this invention is demonstrated. The rubber product of the present invention includes a matrix rubber (hereinafter, sometimes referred to as matrix rubber (A)), and a reinforcing cord embedded in the matrix rubber (A). In addition, this cord for rubber reinforcement is the cord for rubber reinforcement of the present invention described in Embodiment 1.
[0032] As the base rubber (A), a mixed rubber of hydrogenated nitrile rubber (H-NBR / ZDMA) in which zinc methacrylate is dispersed and hydrogenated nitrile rubber (H-NBR) can be used as the main component (50% by mass). rubber. The mixing mass ratio of H-NBR and H-NBR / ZDMA is, for example, in the range of [H-NBR] / [H-NBR / ZDMA]=95 / 5 to 5 / 95. The base rubber (A) may contain other rubbers as long as it contains the above-mentioned mixed rubber as a main component. Known or commercially available rubbers can be used as H-NBR and H-NBR / ZDMA.
[0033] The rubber product of the present ...
Embodiment 1
[0038] Three glass fibers (a bundle of 200 glass filaments having an E glass composition and an average diameter of 9 μm) were bundled, and a coating solution having the components shown in Table 1 below was applied by a known method. Next, the glass fiber to which the coating liquid was applied was dried in a drying oven at 150° C. for 1 minute to form a coating film.
[0039] Element
ratio
H-NBR latex (solid content 40% by mass) ( * 1)
100 parts by mass
Aqueous dispersion of bismaleic anhydride imide (solid content 50% by mass)
50 parts by mass
[0040] ( * 1) Zetpol Latex (manufactured by Japan ZEON Co., Ltd.)
[0041] Next, the glass fibers on which the coating was formed were twisted at a ratio of 8 times / 10 cm, and 11 of them were bundled together, and further twisted at a ratio of 8 times / 10 cm. In this way, a cord for rubber reinforcement was obtained. The ratio of the covering film to the total mass of the rubber reinfo...
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