JPS59123644A - Bonding treatment of glass fibers - Google Patents

Abstract

PURPOSE:To bond glass fibers with a rubber compound with excellent bonding property, a high water resistance, and a high strength by a method in which a glass fiber chord is subjected to a soaking treatment prior to twisting. CONSTITUTION:In bonding glass fibers with a rubber comound, the glass fiber chord is subjected to a soaking treatment with a rubber paste prior to upper twisting, after the upper twisting treatment, the glass fiber chord is closely bonded with an unvulcanized rubber and subjected to a vulcanization treatment for bonding treatment. A plural number of glass fiber strands are combined and subjected to a dipping treatment, and the glass fiber strands are further subjected to a soaking treatment with a rubber paste before the lower twisting treatment or between the upper twisting treatment and the lower twisting treatment. USE:The product is used in transmission belt, tire, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for adhering glass fibers with superior adhesiveness, water resistance, and strength.

In general, glass fiber cords for industrial materials are stronger, less elongated, and have better dimensional stability in heat and grooves than cords made of nylon or polyester fibers, so they mesh with pulleys and transmit power, requiring dimensional accuracy. Effective as a tensile material for harsh toothed belts.

This glass fiber O) cord is manufactured by spinning strands using the marble method, and forming strands of 2 to
Three yarns are combined and subjected to dip treatment [RFI.

[Processing] The fibers are first twisted in a uniform pattern, then several strands are doubled together and then re-twisted to create a final glass fiber cord.Recently, in order to improve the performance of toothed belts and expand their use, matrix fiber cords have been used. Adhesiveness to rubber.

Soaking treatment with rubber glue is performed for the purpose of improving water resistance.

However, as mentioned above, since the glass fiber θJ cord G is tightly fed by the first twist and the second twist, the guide rolls are not easily connected during the soaking process. The strength of the rope may decrease due to friction with tension rolls, etc., and since the rubber glue covers only the surface of the rope, it may not be as flexible, or the rope may slip and become sticky.

The problem remains that sufficient effects such as water resistance cannot be obtained.

The present invention focuses on the actual situation such as the above-mentioned σJ, and solves the problems. It is characterized by having the same two major characteristics as above: strength and water resistance.

To explain this more specifically, a glass fiber θ] cord is coated with a plurality of strands, for example, 2 to 3 strands, and after dipping, the first twist is applied. However, in the present invention, the soaking treatment with rubber glue is applied at least before the glass fiber cord is formed more tightly than in the first twist, that is, in the first twist. It is applied before or between the first twist and the final twist.

Select whether to do it before the first twist, or between the first twist and the first twist, as appropriate.

The soaking treatment is carried out according to a conventional treatment recipe, and it is not necessary to adopt any special process or recipe for this purpose.

Then, the glass fiber cord obtained as above σJ is subjected to a close vulcanization process G with unvulcanized rubber according to the usual method, but the σJ result (J glass fiber cord σ) has good penetration into the inside. The effect of the soaking process is more noticeable than in the past.

The present invention will be explained in more detail below with reference to Examples.

In the examples, the rope adhesive strength refers to the adhesive strength with the fiber material Tocom, and it is embedded in the compound rubber for the image belt having the composition shown in Table 1 of the processing code.
θJ represents the adhesive strength according to the H test method after vulcanization at C for 30 minutes.

In addition, our water-draining strength retention rate is a measure of water resistance, and is expressed as a percentage of how much strength remains after a treated cord is soaked in boiling water for 1 hour.

Example 1 RF L-treated glass fibers consisting of EOG-150 rows were soaked in Table 1 σ]Rubber Compound θ'' and first twisted. teE
A glass fiber cord consisting of CG 150-Bamboo 3 C) configuration was created. Lobe adhesion strength, rope strength, and boiling water strength retention rate were measured using the Next Deko σJ code.

The results were as shown in Table 2.

Table 1 Comb formulation example 2 RF TJ treated EC! After first twisting the glass fibers having a composition of G-150-%, they were subjected to a soaking treatment using the comb combination shown in Table 1, and 13 of them were then final-twisted to obtain the structure of EOG-150-13. A Solas fiber cord was prepared using this material, and its adhesive strength, lobe strength, and boiling water strength retention were similarly measured. The results are also shown in Table 2.

Comparative Example 1 A treatment code was prepared in the same manner as in Example 1, except that the soaking process was removed from Example 1, and λ and σ] were used, and a measurement was performed. σ] The results are also shown in the second page.

Table 2 As is clear from the above examples, the present invention eliminates the drawbacks of the conventional method by soaking the glass fiber cord with rubber glue before twisting and adhering it to various compounds. 1. It is understood that it has a remarkable effect of significantly increasing water resistance and strength, and it is expected that its performance will greatly improve in the future when applied to power transmission belts, tires, and other industrial products.

Claims (1)

[Claims] / In bonding glass fibers and a rubber compound, the glass fiber cord is soaked with rubber glue prior to ply-twisting, and then, after ply-twisting, it is soaked with unvulcanized rubber according to a conventional method. A glass fiber adhesive treatment method characterized by honey vulcanization. (2) A method for adhesion of glass fibers according to claim 1, which comprises doubling a plurality of glass fiber strands, dipping them, soaking them with rubber glue, first twisting, and then gold thread final twisting. 3 jf The dumeras fiber according to the first aspect of the patent claim, in which a plurality of glass fiber strands are plied, subjected to dipping treatment, first twisted, then soaked with rubber glue, and subjected to doubling and final twisting. Adhesion processing method.