KR100478750B1 - Manufacturing method of polyester twisting finished yarn having outstanding elastic property - Google Patents

Abstract

The present invention relates to a method for producing a polyester twisted yarn having excellent elasticity by forming a crimp by twisting a cross-section stretched polyester yarn, and using a cross-sectional shape or a cross-sectional cross-section having at least two protrusions as a material yarn. Following the twisting step of giving 400-1500 twists per meter to this raw material yarn, the heater 3 was heated to a temperature of 150 ° C. or higher and 210 ° C. or lower, which was required for burning, and then twisted. It is a manufacturing method of polyester processed yarn characterized by processing bitumen and twisted yarn in a single process. Especially, it is easy to apply a product requiring a tough touch, and the stretching property after twisting which is a drawback of a stretchable processed yarn by the conventional twisting method This defect has the effect of improving the problem.

Description

    Manufacturing method of polyester twisting finished yarn having outstanding elastic property}

The present invention relates to a method for producing a polyester twisted yarn having excellent elasticity, and more particularly, the elasticity is characterized by forming a crimp by burning a cross-section drawn yarn having a circular cross section or at least two protrusions. A method for producing excellent polyester false twisted yarn.

       In general, clothing that requires a lot of activity, such as sports clothing or casual clothing, is required to wear comfortable yarn to have a comfortable fit. Meanwhile. As a yarn of a material having comfort, a yarn having elasticity has been generally preferred in view of touch, lightness, and the like.

When a person is active, there are some differences depending on the movement, but the muscle of the human body expands or contracts by about 15 to 45%, and at this time, if the worn clothing does not increase to the same level, it feels uncomfortable and comfortable to wear. Sex does not have a satisfactory effect.

    Polyester fiber has many excellent properties, but on the contrary, it has been pointed out that shiny metal gloss, slippery touch, lack of absorbency, etc., and such disadvantage has been a limiting factor.

       Therefore, researches to improve such problems and wear comfort have been continuously conducted, and in particular, in order to improve the feel, development of ultra-fine yarns having 0.5 mm or less of single-sided cross-section yarn or single yarn fineness has been actively carried out, and fabrics using hollow fiber Research has been conducted to lighten or improve the heat retention, and in particular, a lot of research has been carried out for the development of a fabric having elastic properties.

    In general, the method of imparting elasticity to the fabric can be broadly divided into a method of combining the elastic yarn with natural fibers or artificial fibers and a method of imparting elasticity to the artificial fibers themselves.

    In the former case, a spuntex yarn is used as a stretchable yarn to obtain a composite yarn through processing processes such as natural fiber or artificial fiber, air entanglement, joining or covering, and then give elasticity to the fabric woven with the composite yarn. However, Spandex has poor thermal stability and often loses elasticity in the processing process, and there is a problem in that the cost of the product is increased because Spandex's manufacturing cost is high.

    In particular, in the case of using spandex yarn in warp knitted fabrics, there is a problem in that the investment cost is increased because the warp dedicated for spantex yarn is required in the warp process, which is a preparation process.

    In the latter case, the method of imparting elasticity to the artificial fiber itself can be broadly classified into a method of improving or modifying a polymer as a raw material, a method of using a bicomponent polymer in yarn production, and a method by post processing.

    As a method of modifying the polymer, polybutylene terephthalate fiber and polytrimethylene terephthalate fiber are used as a method of using a material capable of increasing the amorphous region in the raw material of the polymer.

    All of these fibers require special equipment due to poor workability and quality when yarns are manufactured using existing equipment due to the thermal properties of the polymer, and polytrimethylene terephthalate fibers are imported entirely. In addition, there are limited supply lines for raw materials, which makes technical dependency deeper, and the price of raw materials is very expensive, which makes it difficult to develop them.

    The method of using a polymer of two components in the production of yarn is usually called a composite spinning, the method of spinning a polymer of the same component with only different physical properties, for example, using a general polyester, A method of complex spinning a polymer having an intrinsic viscosity of 0.66 and a polymer of level 0.64 and a method of complex spinning using a general polymer and a modified polymer. For example, the method of using a general polyester and high shrink polyester, or using a heterogeneous polymer like polytrimethylene terephthalate, etc. are mentioned.

   Because the complex spinning method uses heterogeneous polymers, a dedicated facility is required, and the initial investment cost increases, thereby increasing the manufacturing cost. Also, the use of heterogeneous polymers causes a great variation in quality, which leads to the failure of the final product. There is a problem that increases the occurrence.

    As a post-processing method, the yarn is generally manufactured by processing the yarn to have elasticity by forming a crimp on the yarn through the flammable processing.

    The provision of elasticity by flammable processing can be made by using a general combustor, and there is an advantage that the material yarn can be selectively used. However, when twisting the processed yarn to improve the feel of the fabric, the elasticity is lost or Or there was a lack of elasticity.

    The present invention can selectively use a polyester drawn yarn prepared by using a conventional polyester spinning equipment, to give the elasticity by forming a crimp through the flammable processing, if you give a twist to the processed yarn, which is a problem of the existing method, The technical problem is that the use of a release cross-section yarn to improve the problem of falling or missing elasticity and the absorbency and quick-drying which are disadvantages of the polyester fiber, and to give the elasticity as an additional function.

    The present invention provides a method for selectively using a polyester drawn yarn and improving its processing method to produce a polyester yarn having excellent elasticity. A processed yarn is manufactured using the same equipment as that of FIG.

    In Figure 1, the spindle speed allows 400 to 1500 twists per meter of material yarn.

    In general, the spindle rotation speed can be set to a maximum of 15,000 rpm in view of the facility characteristics of a conventional two for one twister, but preferably not to exceed 12,000 rpm. At this time, when the twist imparted to the yarn is 400 or less per meter, the elasticity of the yarn is inferior, and when it is more than 1500, the elasticity is excellent, but there is a problem that the surface is rough on a woven or knitted fabric. Therefore, the twist of the yarn is preferably 400 or more and less than 1500, more preferably 600 or more and less than 1200.

    The yarn twisted by the spindle speed is given the heat necessary for combustion in the heater 3 in FIG. 1.

    The temperature of the heater is set to satisfy the following equation (1) in consideration of varieties, dyeing properties, and elasticity of the material yarn.

150 ≤ Ht ≤ 210 .......... (1)

    Where Ht: heater temperature (° C)

    At this time, when the temperature Ht of the heater is 150 ° C. or less, the crimping property, that is, the elasticity is inferior, and when the temperature Ht is 210 ° C. or more, the elasticity is improved, but there is a problem that the crystal increases.

    The temperature of the heater in the case of using general polyester has the best range of 180 to 200 degreeC.

    The yarn given the heat required for combustion is combusted in the combustion device (4). Usually, the combustor 4 is divided into a pin type, a disk type or a belt type, and in the present invention, a pin type one is used.

    The direction of the combustible was twisted in the same direction as the twisted direction. At this time, when twisting in the opposite direction to the twisted direction, the surface of the fabric or knitted fabric is soft and bulky, but the elasticity is bad.

     The twist number at the time of burning was set to satisfy following formula (2).

             Tn = 28,000 / (De) 1/2 ± 200 .......... (2)

    Where Tn is the number of twists (T / M)

       De: stands for Denier.

    If the twist number is 28,000 / (De) 1 / 2-200, the elasticity is relatively insufficient and the elasticity is decreased. If the twist number is 28,000 / (De) 1/2 + 200, the defect tends to increase. Therefore, preferably, Tn = 28,000 / (De) 1/2 ± 100 level is the best.

    The winding tension of the twisted yarn was set at 0.08 to 0.2 g per denier, and more preferably 0.1 g per denier.

       Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

       In the Example, the obtained value is measured by the following method.

   1) Fineness, strength and elongation were measured by JIS L1013 method.

2) Elasticity (%) = (L1-L2) × 100

            L1

Ⓛ Dissolve about 500m of the outer surface of the sample using Yarn Reel.

② Enter the standard length (m) of the sample and make skein.

           Sample specification length (m) = 20.5 ÷ (0.0016 x sample fineness x 2)

③ Remove the sample from the yarn, hang it on a hanger, leave 20.5 g of the sample at room temperature for 10 minutes, and measure the sample length (L1).

④ Hang the sample on a hanger and heat-process in a water bath at 82 ± 2 ℃ for 10 minutes.

⑤ Remove the water by removing the sample from the water tank and measure the length (L2).

     3) Feel is evaluated based on the following criteria.

      -◎: Very rough texture

      -○: Soft touch

      -△: a little rough feeling.

      -×: Very rough texture

Example 1

    Using polyester drawn yarn, 75 de / 36f, a circular cross section yarn, was used as a raw material yarn, twisted at 1200 T / M, heat treated at 190 ° C in a heater, and then the spindle rotation speed was 64,663 rpm, and wound at 19 m / min. .

    The strength and elongation of the used yarn were 4.9 g / de and 28%, and the physical properties of the processed yarn are shown in Table 1.

Example 2

    Polyester twisted yarn, 75 de / 36f, triangular cross-section yarn with three protrusions, was twisted to 600 T / M as a raw material yarn, then heat-treated at 190 ° C with a heater, and the spindle rotation speed was 129,326 rpm, followed by 39 m. wound up / min.

    The strength and elongation of the used material yarn was 4.5 g / de and 25%, and the physical properties of the processed yarn are shown in Table 1.

Example 3

    Polyester twisted yarn, 150 de / 72f, four cross-section yarns with four protrusions, was twisted to give 500 T / M of heat, then heat-treated at 190 ° C in a heater, and twisted spindle speed at 155,191 rpm. wound up / min.

    The strength and elongation of the used yarn were 4.8 g / de and 27%, and the physical properties of the processed yarn are shown in Table 1.

Example 4

    Polyester twisted yarn, 150 de / 96f of circular cross-section yarn, was used as a raw material, and twisted to give 500 T / M, then heat-treated at 190 ° C in a heater, and the spindle speed was burned at 155,191 rpm, followed by winding at 46 m / min. It was.

The strength and elongation of the used material yarn were 4.4 g / de and 31%, and the physical properties of the processed yarn are shown in Table 1.

Comparative Example 1

    Polyester drawn yarns were twisted with 1700 T / M of 150 de / 96f, a circular cross-section yarn, as a raw material, heat-treated at 190 ° C in a heater, twisted spindle speed at 24,990 rpm, and wound at 13 m / min. It was.

  The strength and elongation of the used material yarn were 4.4 g / de and 31%, and the physical properties of the processed yarn are shown in Table 1.

Comparative Example 2

    The polyester partial oriented yarn 123 de / 36f was heated to 195 ° C. in a first heater, stretched 1.7 times, and then burned at 755 m / min with the angle of the twist belt at 105 °. The physical properties of the processed yarns are shown in Table 1.

Comparative Example 3

    Polyester drawn yarn, 150 de / 72f, cross-section yarn with four protrusions, made of raw material, heated at 190 ° C in a 1st heater, stretched 1.02 times, and the angle of the flammable belt is 105 °. At 450 m / min. The physical properties of the processed yarns are shown in Table 1.

   The present invention relates to a method for producing a processed yarn having excellent stretch stability, which can give elasticity to a fabric or knitted fabric through processing using polyester drawn yarn as a material yarn, and can use existing production equipment. In particular, it is easy to apply to a product requiring a tough touch, and has the effect of improving the problem that the stretching property is poor after the twist, which is a problem of the stretchable fabricator manufactured by the existing twisting method.

  1 is a process schematic diagram showing the false machining process used in the present invention.

  Fig. 2 is a process schematic diagram showing a flammable processing step of a conventional stretched yarn.

<Description of the code | symbol about the principal part of drawing>

      1: spindle 2: supply pirn

      3: heater 4: flammable device

      5: cheese

Claims (4)

    In manufacturing a stretchable yarn by twisting polyester stretched yarn to form a crimp, a cross-sectional shape of circular cross-section or at least two protrusions having at least two protrusions is used as a raw material yarn, and 400 to 1 meter for the raw material yarn. Method for producing a polyester twisted yarn characterized in that after the twisting step to give a twist of 1500 pieces, the heat required for the combustion in the heater (3), and then twisting in the same direction as the twisted direction.     The method according to claim 1,   Method for producing a polyester twisted processing yarn, characterized in that the temperature of the heater (3) is set as follows.                        150 ≤ Ht ≤ 210              In the above formula, Ht represents the temperature (° C) of the heater.     The method according to claim 1, Method of producing a polyester twisted processing yarn, characterized in that during twisting, the number of twists is set to satisfy the following formula. Tn = 28,000 / (De) ¹ /2-200                        Where Tn is the twist number (T / M),                                    De is the islander.        The method according to claim 1, A method for producing a polyester twisted twisted yarn characterized by processing twisted yarn and twisted in a single process.