KR19990030800A - Manufacturing method of nylon microfiber high stretch knit - Google Patents

Abstract

The present invention stretches and combusts nylon microfibers having a single-density fineness of 1.0 denier, expresses a loop having uniform bulkiness, doubles elasticity, and interlocks with a polyurethane elastic yarn, characterized in that it is interwoven with polyurethane elastic yarn. Providing a manufacturing method, the nylon microfiber is soft and elastically flammable, and the twisted nylon microfiber is interlaced with polyurethane elastic yarn to further double the elasticity and soft touch, making it much softer and unique than the existing products. Lightweight and warmth can be maximized.

Description

Manufacturing method of nylon microfiber high stretch knit

The present invention relates to a method for producing a nylon microfiber high stretch knit, and more specifically, a nylon microfiber having a single yarn fineness of 1.0 denier is stretched and flammed to express a uniform bulky loop and double elasticity, and then polyurethane elastic yarn The present invention relates to a method for producing a nylon microfiber high-stretch knitted fabric which has a surface smooth and has excellent elasticity not only in the width direction but also in the longitudinal direction of the product.

In the conventional method of manufacturing a composite twisted yarn, Japanese Patent Application Laid-Open No. 9-3746 manufactures a product having excellent surface smoothness by blending, blending, and air-treating different types of yarns having different single yarn fineness and non-shrinkage ratio and forming them after heat treatment. Japanese Unexamined Patent Publication No. 9-3739 proposes a method of drawing and twisting different types of yarns having different birefringence ratios by air-interlacing, followed by stretching and flamming. Shinsa is a combustible yarn, which is a sublime polyester multifilament wool yarn, and in the case of applying microfiber, it is possible to manufacture a micro-fine twisted yarn having excellent crimp rate by combusting and dividing the bicomponent blended yarn by composite spinning. the birefringence is 20 × 10 ^-3 to 80 × 10 ^-3 of the non-drawn polyester multifilament And then stretching the yarn to at least 1.1, while the ratio more than 30% over the blood rate is the production process for manufacturing a polyester crimped false twist processed by the air crimped's method has been proposed.

In addition, Japanese Patent Application Laid-Open No. 9-87939 uses polyurethane elastic yarn as a screening, and weaved and twisted yarns at 60 to 120 T / M using a polyester multifilament composite structured yarn as a coated yarn, followed by additional yarns to give a sublimated crimp elastic coated yarn. Japanese Patent Application Laid-Open No. 9-67702 discloses a method for manufacturing women's stockings characterized in that the S.D.M (SDM) value is 1.5 μ or less due to the double yarn crimped with nylon elastic filaments. It is proposed.

In addition, Korean Patent Publication No. 97-27417 describes dyeing processing of stretch fabrics to minimize curling and folding of the side of the yarn during dyeing process without any damage to the inherent characteristics such as stretch fabric and stretch recovery. A method for dyeing stretch fabrics that does not form wrinkles by shrinking the highly stretchable fabric in advance by dry heat setting or wet heat setting to prevent wrinkles and to prevent irregular wrinkles has been proposed.

However, the above methods are mainly composed of two-component composite microfiber yarn by polyester multifilament or composite spinning, and the physical properties of the yarn used in the flammable processing are different in fineness, shrinkage, and birefringence. In most cases, heterogeneous yarns are mixed, so expensive special yarns are required, and additional blending processes are required, and it is difficult to manufacture high-strength products only by the existing combustion process. Difficulties in manufacturing high value-added products have not been established, such as processing technology, teaching with polyurethane elastic yarn, and anti-wrinkle processing technology.

The present invention is to solve the problems as described above to provide a method for producing a high-knit knitted fabric by performing a dyeing process after twisting the nylon microfiber and twisted with a polyurethane elastic yarn without using expensive special yarns will be.

1 is a process schematic diagram of manufacturing the stretch nylon microfiber false twist yarn of the present invention.

Explanation of Main Part Codes in Drawings

10 nylon microfiber 20 first feed roller

30: contact heat treatment plate 40: reverse rotation combustible belt

50: drawing roller 60: second supply roller

70: winding roller

That is, the present invention is characterized by performing a dyeing process after stretching and flamming nylon microfibers having a single yarn fineness level of 1.0 denier, expressing a loop having a uniform bulk property, and multiplying elasticity and interwoven with polyurethane elastic yarns. It is to provide a method for producing a nylon micro high stretch knit.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic view illustrating a process of manufacturing the stretchable nylon microfiber twisted yarn of the present invention. In the manufacture of the twisted yarn, the nylon microfiber 10 having a single yarn fineness of 1.0 denier is supplied through the first feed roller 20. Yarn proceeding through the first feed roller 20 forms a favorable condition for causing deformation of the thermoplastic fiber polymer in the contact heat treatment plate 30 in the temperature range of 165 to 170 ℃. At this time, when the temperature of the contact-type heat treatment plate is less than 165 ℃, it is difficult to form the appearance of a large loop shape with uniform bulkiness and stretching is insufficient, and when the yarn is over 170 ℃, the yarn is fused due to high heat The crimp form of the loop becomes uneven.

The yarn passing through the contact heat treatment plate is subjected to the stretching and burning process simultaneously while passing through the reverse rotation combustion belt 40 and the stretching roller 50, which are belt-type rotational combustion devices that rotate back to each other via a cooling plate. At this time, the combustible state of the yarn is changed according to the speed ratio of the twist belts which rotate in reverse direction, the angle of the twist belt, and the draw ratio by the draw roller. The speed ratio of the twist belt is 1.340 to 1.360, the angle of the twist belt is 110 to 115 °, and the draw ratio by the draw roller is 1.06 to 1.10.

If the speed ratio of the combustible belt is less than 1.340, it is easy to cause moor or pin yarn, and if the speed ratio of the combustible belt exceeds 1.360, the force to twist the yarn increases, resulting in unburned smoke or squeeze on the yarn. easy. In the case of the flammable belt, if the angle is less than 110 °, the crimp shape of the loop is uneven and the bulkiness is reduced. If it exceeds 115 °, unburnt is easily generated and pin yarn may be generated. If the draw ratio is less than 1.06, not only it is difficult to express a large bulky crimp, but also it is easy to generate unsealed smoke, and if it exceeds 1.10, the denier of the combustible yarn is too low, and pin yarn or trimming occurs, thereby making the work poor.

The combustible yarn that has passed the appropriate conditions as described above passes through the second supply roller 60 to stabilize the bulkiness and crimp state of the combustible yarn and is overfeed in the range of 1 to 2% when wound through the winding roller 70. While giving the rate, the bobbin hardness of the twisted yarn is maintained at a level of 65 to 70 g, and adjusted to be suitable for maritime.

In order to apply the processed yarn thus manufactured to circular knitting products, 120 bobbins each with polyurethane elastic yarns are prepared, and the circular knitting machine is made of a single plain fabric with a 28 gauge 36 inch size in a circular knitting machine. The weight of the product is based on 260g / yd.

Nylon microfiber high stretch circular knitting fabric prepared as described above is subjected to a dyeing process in order to minimize wrinkles, defects curling or folding of the nylon circular knitting, and the conditions are as follows.

First, the nylon micro high-stretch circular knitted fabric is opened, and dry heat setting is performed as a pretreatment. Dry heat setting is important in the dyeing process, but the condition of dry heat setting is preferably 30 to 60 seconds at 170 to 180 ° C. When the dry heat setting temperature is less than 170 ℃ wrinkles occur and the edge curling phenomenon can not be minimized. If the temperature exceeds 180 ℃, the dough is stretched and discolored and the touch becomes rough due to the yellowing or melting of the elastic yarn.

After dry heat setting as a pretreatment, a needle is applied to form a fabric into a cylindrical shape, and then a dyeing process is performed. By performing the sewing process as described above, it is possible to solve the disadvantages such as staining or staining due to curled edges and stained edges.

After sewing, dye the cloth, open it again, and perform the final dry heat setting. Even in the final dry heat setting, the temperature does not exceed 180 ° C. and is treated to a size of 250 inches to 260 g / yd 55 inches wide.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples.

Example 1

In order to combust the nylon microfibers, a highly elastic combustible yarn was manufactured with a draw ratio of 1.09, a belt speed ratio of 1.363, a belt angle of 112.5 °, and a heat treatment plate temperature of 170 ° C. while being fed at a speed of 350 m / min to a reverse rotating belt combustor. The nylon microfiber twisted yarn and polyurethane elastic yarn thus prepared are interwoven in a circular knitting machine in a 28 gauge, 36 inch diameter and 20rpm level knitting single plain fabric.

The circular knitted dough is processed in the order of opening width, pretreatment dry heat setting, sewing needle, refining, dyeing, opening width, and final dry heat setting. The pre-treatment dry heat setting conditions were 40 seconds at 180 ℃, the final dry heat setting was 50 seconds at 180 ℃, the width and weight of the product was 55 inches and 255g / yd. After processing and commercializing as described above, the properties thereof are shown in Table 2 below.

Comparative Example 1

Nylon microfiber was processed and commercialized in the same manner as in Example 1 under the same conditions as shown in Table 1, and the properties thereof were evaluated and shown in Table 2.

Comparative Example 2

Nylon general yarns were processed and commercialized in the same manner as in Example 1 under the same conditions as shown in Table 1, and their properties were evaluated and shown in Table 2.

Comparative Example 3

The polyester multifilament was processed and commercialized in the same manner as in Example 1 under the same conditions as shown in Table 1, and the properties thereof were evaluated and shown in Table 2.

Comparative Example 4

Under the conditions as shown in Table 1, the nylon microfibers were subjected to combustible processing as in Example 1, but immediately proceeded in the order of refining, dyeing, opening, and final dry heat setting without performing the pretreatment dry heat setting process during the dyeing process. The properties are evaluated and shown in Table 2.

Comparative Example 5

Nylon microfibers were knitted directly in the filament state without being flammable under the same conditions as shown in Table 1, and then subjected to the dyeing process to evaluate the properties thereof.

Comparative Example 6

Nylon filaments are knitted immediately in a filament state without false twisting, and then dyed processing is performed to evaluate the properties thereof.

Comparative Example 7

The multi-filament of polyester multifilament was subjected to the same process as in Example 1, and the pretreatment dry heat setting process was omitted during the dyeing process, and the properties were evaluated in the order of refining, dyeing, opening width, and final dry heat setting. It was.

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Yarn used NY100d / 96f NY 70d / 68f NY100d / 24f PET100d / 192f NY100d / 96f NY100d / 96f NY100d / 24f PET100d / 192f Flammable condition Firing speed (m / min) 350 300 350 400 350 × × 400 Elongation ratio 1.09 1.08 1.09 1.10 1.09 1.10 Belt speed ratio 1.363 1.366 1.363 1.368 1.363 1.368 Belt angle (°) 112.5 110 112.5 112.5 112.5 112.5 Heat Treatment Plate Temperature (℃) 170 170 170 180 170 180 Knitting condition Gauge (G / G) 28 Diameter (inch) 36 group Single plain Dyeing Processing Conditions Opening ○ ○ ○ ○ × ○ ○ × Pretreatment Dry Heat Setting ○ ○ ○ ○ × ○ ○ × Bee sting ○ ○ ○ ○ × ○ ○ × Refining ○ ○ ○ ○ ○ ○ ○ ○ dyeing ○ ○ ○ ○ ○ ○ ○ ○ Opening ○ ○ ○ ○ ○ ○ ○ ○ Final dry heat setting ○ ○ ○ ○ ○ ○ ○ ○

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Machinability ○ △ △ ○ ○ ○ Processing company appearance (Bulky Castle) ○ × △ ○ ○ ○ Form yarn stability ○ △ △ △ ○ △ Knitting ○ ○ ○ ○ ○ △ △ ○ Product appearance (mura state) ○ △ △ △ ○ × × △ Product feeling (soft feeling) ○ ○ × × ○ △ × × Siwa (wrinkle) ○ ○ ○ ○ × ○ ○ × Stool ○ ○ ○ ○ × ○ ○ × elasticity ○ ○ △ △ ○ △ △ △

○: Good △: Normal ×: Inadequate

According to the present invention, the nylon microfibers having a single yarn fineness of 1.0 denier are softly stretched with excellent flexibility, and the nylon microfibers processed by twisting with the polyurethane elastic yarn are further doubled in elasticity and soft touch, making them much softer and more microscopic than conventional products. The unique lightweight and warmth of the fiber can be maximized.

In addition, since 100% nylon single component is used, work can be carried out usefully in the existing post-process facilities, and when the product is manufactured by the method according to the present invention, the tightness, stretch, and softness of the recent fashion trend are given. It can be used for casual and sports clothes such as t-shirts, dresses, pants, and lingerie.

Claims (2)

Nylon microfibers having a single yarn fineness degree of 1.0 denier are stretched and flammed to express a loop having uniform bulkiness, double elasticity, and interwoven with polyurethane elastic yarns to produce nylon microfibers according to the present invention. Way. According to claim 1, wherein the stretching, the flamming treatment is passed through a heat treatment plate of 165 to 170 ℃ nylon microfibers supplied through a feed roller in the reverse rotation belt type rotary combustor, the speed ratio of 1.340 to 1.360, of the combustible belt A method for producing a nylon microfiber high stretch knitted fabric, which is combustible at an angle of 110 to 115 °, stretched and wound at a draw ratio of 1.06 to 1.10.