KR19990009000A - Manufacturing method of plain weave for tire cord - Google Patents

Abstract

The present invention relates to the production of plain weave yarn by combining the glass fiber of the screening yarn and the cotton yarn of the coated yarn with a coupling water of 15-40T / 10cm and then heat-treating at 80-110 ° C for 40-80 minutes. Tire cord paper woven using plain weave yarn has a significantly lower width of the plain weave, resulting in a good inclined density (EPI) of the cord paper, less damage to the product quality, and reduced defective rate.

Description

Manufacturing method of plain weave for tire cord

The present invention relates to a method of manufacturing a low-shrink plain weave (tabby yarn) that is used as weft yarns for weaving tire cords. In general, a tire cord includes a fabric woven in a net shape in a tire rubber of a car or a bicycle. The main purpose is to extend the life of the tire.

As a general form, a thick yarn of synthetic fiber yarn or dented cotton yarn is used in a slope of about 24 to 28 ol per inch, and weaved at 1 cm intervals using sedenite cotton yarn as weft yarn. The role is simply to keep the slope until it is in the rubber solution to keep it straight.

As the weft used in the weaving of tire cord paper is mainly intended to maintain the shape of the inclination, weaving is usually done with less weft density than ordinary fabrics. It is difficult to maintain the shape of the cord when it is subjected to heat treatment or latex treatment by connecting.

Therefore, when weaving cord paper used for tire cords, we need to cut at the beginning and end or in the middle, which is stronger and less shrinkage than synthetic fiber or cotton yarn, which is usually used as weft yarn. It not only facilitates work in cutting, heat treating, or latex processing code paper to a certain length, but also serves to maintain the shape of the code paper. This part is generally referred to as a tabby, and the weft used here is called a tabby.

Conventionally, most plain weaving yarns are mainly cotton or synthetic fiber yarns. The plain weaving yarn is used to cut the cord paper woven to a certain length by heat treatment or latex treatment, and to bond the rubber to tires. There is a problem in that shrinkage occurs during the heat treatment or latex treatment to damage the product quality.

In other words, the tabby part with a lot of weft density has a high shrinkage rate, while the part other than the plain weave part with a small amount of weft density (1cm interval) has a small shrinkage rate so that a gap occurs and the product quality damage as well as a defective rate when used as a product. Will also increase.

On the other hand, conventional glass fiber (glass fiber) 750 day / 3 hap as a screening, cotton yarn 150 denier / 2 hap after being wrapped (wrap), rewinding (rewinding) and manufactured by heat treatment, but the plain weave is used as described above Tire cords using plain weaving yarns produced are too wide in the width of the plain weaves when heat treated at high temperatures, resulting in poor EPI density of the fabrics, and in the shuttleless looms, these plain weaving yarns are so hard that weaving is difficult. There was a problem.

In detail, the expansion is as follows. A fabric produced in the weaving process is called a raw fabric, and the fabric produced after coating the fabric with a dip chemical in a heat treatment process and applying heat to dry it is called a dipped fabric. By shrinking we mean the difference between the width of the plain weave of the fabric and the width of the plain weave of the deep fabric. When the width of the plain weave decreases, the width of the main portion decreases accordingly, so that the EPI of the fabric becomes poor, and the increase of waste and the incidence of defective rolls increase according to the defect of the EPI.

Accordingly, an object of the present invention is to provide a plain weave yarn in which glass fiber is used as a screening and a cotton yarn is used as a coated yarn while the shrinkage is minimized during heat treatment.

In the research of the present inventors for solving the above problems, when manufacturing a plain weave yarn with a glass fiber as the screening yarn and a cotton yarn as the coated yarn, a proper number of connections is given by passing the twisting process before the rewinding process. When the flat weave of manufactured plain weave is increased, and when the flat weave of tire cord paper is constructed using the flat weave with increased flexibility, the increased flexibility is generated by the high temperature dipping treatment. It has been found that the EPI of the tire cord is improved by acting to offset the contraction of the plain weave of the cord.

Therefore, according to the present invention, when manufacturing a flat cord yarn for tire cords using glass fiber as a screening yarn and a cotton thread as a coated yarn, the screening yarn and the coated yarn are joined together at a linkage of 15 to 40T / 10cm and then 80 to 110 ° C. There is provided a method for producing a plain weave yarn for tire cords comprising the step of heat treatment for 40 to 80 minutes.

Hereinafter, the present invention will be described in more detail.

According to a preferred embodiment of the present invention, the plain weave yarn for the tire cord is rewinded by combining the glass fiber of the screening yarn and the cotton yarn of the coated yarn with a coupling water of 15 to 40T / 10 cm, and then heat-treated at 80 to 110 ° C for 40 to 80 minutes. It can be produced by conditioning.

In accordance with the present invention, when the screening glass fiber and the coated yarn are joined together at a linkage of 15 to 40T / 10 cm, the flexibility of the plain weave is increased, and the increased flexibility acts to offset the shrinkage of the plain weave during heat treatment. As a result, the warp density of the deep woven fabric becomes good. If the number of joints is less than 15T / 10㎝, defects occur during weaving due to poor joining conditions, and if it exceeds 40T / 10cm, excessive torque occurs and the shrinkage of cord paper increases. Will be

In addition, the bonded yarn is heat treated for 40 to 60 minutes under the steam of 80 ~ 110 ℃, when the heat treatment temperature is less than 80 ℃, the shrinkage effect of the plain weave yarn is less, and when the latex treatment of the woven cord paper using this, the shrinkage rate of the cord paper is increased There is a problem, if the heat treatment temperature exceeds 110 ℃ causes damage to plain weave.

Although not specifically limited, it is preferable that the glass fiber which is a screen is made into 750 denier / 2 go-750 denier / 3 go, and the cotton thread which is coated yarn is preferably 150 denier / 1 go-150 denier / 2 go. In particular, plain weave yarns with glass fiber 750 denier / 2 go are softer than plain weaves with glass fiber 750 denier / 3 go, which makes them suitable for shuttleless looms.

As described above, the cord paper woven using the plain weaving yarn manufactured according to the present invention minimizes the shrinkage of the plain weave portion, and the shrinkage ratio of the plain weave portion and the main weave portion is almost the same, thereby preventing the problem of damaging the product quality. .

Features and other advantages of the present invention as described above will become more apparent from the following examples. However, the present invention is not limited to the following examples.

<Example 1>

Glass fiber 750 denier / 3 ply as screening, cotton yarn 150 denier / 1 ply as cover yarn, re-wound with 20 x 20 of Ties (T / 10cm), heat treated at 90 ° C for 50 minutes, and then 48 hours Were conditioned to make plain weave.

In order to evaluate the characteristics of the plain weave fabric thus manufactured, the weaving density of the plain weave was 38 × 28/5 cm (weft x weft) using the plain weave as the weft and the polyester spun yarn (1100D / 3 sum) of 3300D. Weaved cord paper). The plain weave part width of the obtained cord paper fabric was 158 cm. The cord paper fabric was dipped in latex and heat dried to prepare a deep fabric. The plain weave width of the deep woven fabric was 144 cm. The plain weave shrinkage ratio was 9.7% as calculated by the following equation.

<Examples 2 to 3>

The same procedure as in Example 1 was repeated except that the number of the glass fiber of the examiner, the number of cotton yarn of the coated yarn, the joint condition, and the heat setting condition were changed as shown in Table 1 below.

<Comparative Examples 1 to 3>

The same procedure as in Example 1 was repeated except that the joining process was omitted and the number of the glass fiber of the examiner, the number of cotton yarn of the coated yarn, and the heat setting conditions were changed as shown in Table 1 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Heat setting condition 90 ℃, 50 minutes 90 ℃, 50 minutes 90 ℃, 50 minutes 90 ℃, 50 minutes 70 ℃, 50 minutes 90 ℃, 30 minutes Linkage number (T / 10cm) 20 × 20 30 × 30 40 × 40 - - - Glass fiber 750D / 3 go 750D / 2 go 750D / 2 go 750D / 3 go 750D / 2 go 750D / 3 go Cotton yarn 150D / 1 go 150D / 2 go 150D / 2 go 150D / 2 go 150D / 2 go 150D / 1 go Plain weave width 158 cm 158 cm 158 cm 158 cm 158 cm 158 cm Deep Fabric Plain Weave Width 144 cm 145 cm 145 cm 138 cm 135 cm 130 cm Plain weave shrinkage 9.7% 9.0% 9.0% 14.5% 16.7% 21.5%

From Table 1, in Examples 1 to 3 in which weaving code sheets using plain weave yarns with the number of linkages within the range according to the present invention, weaving the code sheets using plain weaving yarns without the number of linkages by the conventional method It can be seen that the plain weave portion shrinkage is significantly reduced compared to Comparative Examples 1 to 3. As described above, according to the present invention, the width reduction of the plain weave portion is significantly low, so that the EPI of the cord paper is good, so that damage to product quality is reduced and the defective rate is reduced.

Claims (1)

In manufacturing a plain weave yarn for tire cords using glass fiber as the screening yarn and the cotton thread as the coated yarn, the screened yarn and the coated yarn are joined together with a linkage of 15 to 40T / 10cm and then heat treated at 80 to 110 ° C for 40 to 80 minutes. The manufacturing method of the plain weave yarn for tire cords including the process of doing.