KR101253085B1 - Process Of Producing Low―Shrinkage Polyester Filament Yarn For Ultra―Thin Fabric - Google Patents

Abstract

The present invention relates to a method for producing polyester low shrink filament yarn for weaving highly sensitive ultra-thin fabrics, and is particularly preferred for producing ultra-thin fabrics having a silk-like feel and excellent elasticity, drape and creep effect. Polyester low shrink filament yarns having strength, elongation, shrinkage and single yarn fineness can be provided.

Description

Process of Producing Low-Shrinkage Polyester Filament Yarn For Ultra-Thin Fabric

The present invention relates to a method for producing a polyester low shrink filament yarn for weaving a highly sensitive ultra-thin fabric.

The technology related to synthetic fibers has been developed a lot, and many technologies are being introduced to mimic the physical properties and feel of natural fibers. In particular, the development of Silk-Like products, which mimic silk, was applied to mimic silk fibers by the release cross-section technology and alkali reduction technology in the 1960s. In the 1980s, various technologies such as di-shrink blending and two-component blending were developed. They were applied as core technologies in developing silk-like polyester materials, and in 1988, they acted as a driving force to create a new word "synthetic island" in Japan. In the 1990s, the new island technology was integrated, and a new island is being developed that combines multiple hybrid control technology and social interaction technology for special effects.

However, until now, the processing related technology is a type of technology that blends and processes heterogeneous fibers, and it is only to manufacture processed yarns with fineness of 50de / 12fila or more.The touch is hard, and the products using bishrink composite materials are caused by whiteness. Therefore, it is difficult to apply as an ultra light clothing material for high quality blouse. In addition, in the case of 20 ~ 30de / 12fila class fine-grained material, there are many defects due to the shrinkage rate of the material itself, so there is a problem of deterioration of workability in weaving preparation / weaving process and deterioration of texture of fabric. There has been difficulty. In the case of 20 ~ 30de / 12fila class fine material, lead-free sizing treatment is done using multifilament yarns rather than processed yarns. After high-density weaving, it is coated and water-repelled in post processing. The situation is developing.

Therefore, the present invention solves the problems of the prior art by overcoming the workability in the weaving preparation / weaving process due to the shrinkage rate of the material itself, even 20 ~ 30de / 12fila class fine material, to overcome the touch of the fabric and the fabric defective rate It is a technical task to provide a polyester low shrinkage filament yarn for highly sensitive silk-like ultra-thin fabrics having strength, elongation and shrinkage rate, which is particularly desirable for producing ultra-thin fabrics having excellent elasticity, drape and creep effect.

Therefore, according to the present invention, the polyester unstretched filament is passed through the first gourd roller, passed through a hot plate, and passed through the second gourd roller, then passed through an interlaced poly winding fabric for manufacturing ultra-thin fabrics, characterized in that Provided is a method for producing an ester low shrinkage filament yarn.

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

The ultra-thin fabric manufacturing polyester low-shrink filament yarn provided by the present invention is for weaving a highly sensitive ultra-thin fabric that has a high moisture content and a dense structure, excellent in light weight, stretch and drape, and soft touch.

Ultra-thin fabric manufacturing polyester low-shrink filament yarn of the present invention passes through the polyester unstretched filament (1) while winding the first high 뎃 roller (2), as shown in Figure 1 through the hot plate (3) After winding through the second roller 4 and interlaced with the interlaced nozzle 5, it is wound around the winding roller 6 to be made into a low shrinkage filament yarn. In particular, the polyester unstretched filament is made of 85 to 95 ° C. After passing 6-8 times in one gourd roller, pass it through a hot plate at 200 ~ 230 ℃, and pass it in an overfeed rate of 0.95-0.99 while passing it 6-8 times in a second gourd roller at room temperature.

When the polyester unstretched filament is wound around the first gourd roller 6 to 8 times while passing, it can be thermally stabilized by bringing the temperature of the unstretched filament close to Tg. When the temperature of the hot plate is less than 200 ℃, the low shrinkage characteristics of the manufactured yarn is not well expressed, and if the temperature exceeds 230 ℃, the cutting strength of the low shrink filament may increase, but the cutting elongation may decrease, which increases the treatment temperature. This is because the degree of crystallinity increases due to the arrangement of the molecular chains in the fiber axis direction at the time of stretching, and the molecular chains are tensioned in the amorphous region, resulting in a close packing density in the molecules.

On the other hand, the thermal stress characteristic refers to a change in force generated by heat. In general, when a material receives heat, the material is accompanied by a change in physical properties and a change in form. The polymer material shrinks when the state of the constituent molecules changes when heated. When reheating the filament yarn after the processing process, the linear polymer with increased motility flows through the molecule when the segment starts to flow first and exceeds a certain level of energy. In the present invention, the maximum stress can be reduced when the temperature of the hot plate exceeds 230 ℃, due to the increase in the fluidity of the molecular chain set at a high temperature seems to decrease the thermal stress due to the decrease in the cohesion between molecules.

The filament passed through the second gourd roller is interlaced with air pressure of 1.25 ~ 1.75㎏ / ㎠ and wound at 550 ~ 650m / min of firing speed to form low shrinkage filament yarn. It is possible to improve the workability, such as to prevent the occurrence of the pin yarn in the weaving step before the weaving step, to improve the maritime properties. If the air pressure is less than 1.25㎏ / ㎠ may cause dyeing unevenness and may decrease the maritime properties. When it exceeds 1.75 kg / cm <2>, elongation may fall. The number of interlaces is adjusted to 70 to 100 / m to facilitate the work in the post-process.

Preferably, the polyester unstretched filament has a strength of 2.9 to 3.2 g / d, an elongation of 10 to 14%, and a single yarn fineness of 2.5 to 3.0d, and the low shrinkage filament yarn has a strength of 4.81 to 4.96 g / d and an elongation of 23.3. ~ 26.0%, shrinkage rate 2.8 ~ 3.6%, maximum thermal stress 0.8 ~ 0.9g / d and single yarn fineness of 1.5 ~ 2.0d are especially preferred for weaving highly sensitive ultra-thin fabrics with excellent drape and soft touch.

Therefore, according to the present invention, there is provided a fine-grained polyester low shrink filament yarn having a strength similar to silk and excellent strength, elongation and low shrinkage, especially for producing an ultra-thin fabric having excellent elasticity, drape and creep effect. can do.

1 is a schematic view of the manufacturing process of the polyester low shrinkage filament yarn of the present invention,
2 is a micrograph of a polyester low shrinkage filament cross section of the present invention,
Figure 3 is a micrograph of the surface of the fabric woven with polyester low shrink filament yarn of the present invention,
Figure 4 is a micrograph of the surface of the fabric woven with polyester low shrinkage filament yarn of the present invention,
5 is a photograph of a woven fabric of the polyester low shrinkage filament yarn of the present invention.

The following examples are given as non-limiting examples of the method for producing a polyester low shrink filament yarn for manufacturing ultra-thin fabric of the present invention.

Example 1

After passing the polyester unstretched filament (34d / 12fila, strength 3.04g / d, elongation 13%) to the first high roller with 90 ° C, it passed through a hot plate of 200 ° C and a second high roller of 85 ° C. While winding, it passes through at an overfeed rate of 0.9725 to draw. After interlacing with air pressure of 1.5㎏ / ㎠, the number of interlace is 80 ~ 86 / m, and then wound at 600m / min to manufacture low shrinkage filament yarn (20d / 12fila), and the properties of low shrinkage filament yarn are as follows. Measured together.

* Yarn property test

end. Fineness experiment

According to KS K 0416 filament yarn fineness measurement method (winding method), the collected skein is wound 90 times in a reel with a circumference of 1m and dried for 30 minutes at a heating chamber temperature of 50 ° C. The fineness of the yarn was measured by measuring the weight.

I. Tensile strength

Textechno Statimat Me. (German) was tested for 10 times at a sample length of 200mm, Test speed 2000m / min conditions for 24 hours at room temperature. Breaking Tenacity and Breaking Elongation were obtained from the software provided in the experimental device, and the average value of 10 times was obtained from each result.

All. 4 shrinkage characteristics

1) Hank (KS K 0215) wet heat shrinkage test

After winding the sample on the reel of the detector and making it into a state of squeeze, obtain the ledger by applying 0.1g / d ultra-low load to the tank, and then immersing it in water bath tank at 100 ℃ for 30 minutes under no tension, followed by wet heat treatment. After standing at room temperature, the amount of shrinkage was measured by measuring the length of the sample with an ultraload of 0.1 g / d.

% Moist heat shrinkage (%) = {(initial ledger-contracted length after treatment) / initial ledger} × 100

la. Thermal stress

Kanebo Engineering. Using the thermal stress tester of LTD, the length of the sample was made into 50mm hook state, and the stress and temperature at the peak point were measured by repeating the test three times with the super load 0.03g / d under the heating rate of 2.3 ℃ / sec.

hemp. section

In order to observe the yarn cross-sectional shape, Au-Pd coating was carried out under 75 × 10 ^-3 mmHg decompression and then observed using a scanning electron microscope (Scanning Electron Microscope, S-3200N, Hitachi Co., Ltd.). 2 is observed using an image analyzer (STEMI 2000-C).

four. Property measurement result

  division Fineness burglar Shinto Shrinkage Thermal stress Example 1 20.6d / 12fila 4.95 g / d  25.3% 3.5% 0.82 g / d

EXAMPLE 2 AND 3

The polyester low-shrink filament yarn of Example 1 was supplied to the weft yarn, and then weaved under the conditions shown in Table 2, and then the fabric was reduced and refined, then preset and reduced, and then dyed with a disperse dye and dried to prepare a fabric. And the physical properties were measured as follows and shown in Table 3.

division slope Wesa Inch Slope Dough density (light / stomach) weight group Example 2 20/24 PET
(3200T / M, S: Z) 20/12 PET 73 8,800 120/126 48 Plain Example 3 20/24 PET
(3200T / MS: Z) 20/12 PET 73 8,800 120/118 43 Plain

＊ Mechanical properties of the fabric

KES-FB 1 ~ 4 System (Kawabata Evaluation System of Fabric) developed by Kawabata et al. The mechanical properties of 16 fabrics were evaluated.

end. Tensile Properties

Tensile properties of fabrics are those that are extensible and resilient by external forces and affect dynamic restraint when using the product. Tensile properties include tensile elongation (EM), tensile energy (WT), and tensile resilience (RT). EM indicates elongation of tensile properties. High EM values indicate good elasticity but poor dimensional stability. As shown in Table 3, it can be seen that the fabrics of Examples 2 and 3 exhibited good stretch.

I. Bending characteristics

If the bending stiffness (B) of the bending characteristics of the fabric is too small, there is no form stability and product formability is deteriorated, but the drape property is good. As shown in Table 3, because the numerical value of the bending stiffness (B) was low, the drape was excellent.

All. Compression characteristics

Compression characteristics are the main characteristics that have a direct effect on the characteristics such as voluminous feel, softness, and warmth. As shown in Table 3, the RC value is about 69-72%, which shows that the recoverability against compression is excellent.

＊ Fabric touch evaluation

H.V (Hand Value) values were evaluated in the mechanical properties of the fabric using the KES-FB System (Kawabata Evaluation System of Fabric). In Examples 1 and 2, most of the KISHIMI values exhibiting Silk characteristics were excellent at 4.15 or more, and the SHARI values were also very high (4 or more).

＊ Fabric shape observation

In order to observe the cross-sectional shape of the fabric, Au-Pd coating under reduced pressure of 75 × 10 ^-3 mmHg was observed using a scanning electron microscope (Scanning Electron Microscope, S-3200N, Hitachi Co., Ltd.). Shapes were observed using an image analyzer (STEMI 2000-C) and are shown in FIGS. 3 and 4.

＊ Color fastness

end. Colorfastness to Washing

The color fastness test was measured by B-AIS method of KS K 0430. Temperature 40 ± 2 ℃, soap 5g / ℓ, liquid volume 100ml, stainless steel beads 10, test bottle capacity about 450ml, washed for 30 minutes After washing with water and drying, the fastness was measured by comparing the discoloration of the specimen and the degree of contamination of the attached white cloth with the standard gray color table for discoloration or the standard gray color table for contamination, respectively.

I. Colorfastness to Rubbing

The friction fastness test was conducted according to KS K 0650, and the size of the test piece was made into a square of 20 × 10 cm, and the inclination direction was lengthened, and it was judged after reciprocating the fabric surface 10 times for 10 seconds for 10 seconds with a load of 900 g. do. Both dry and wet tests were performed.

All. Colorfastness to Light: Standard Fade Time

Daylight fastness was tested by KS K 0218. The test piece was 6.4 × 7.6 cm in size, and was applied to the standard blue dye method using a daylight fastness tester Fade-Ometer (Atlas Co.LTD, USA) without exceeding a temperature of 74 ° C and a humidity of 50% RH. Was measured.

division H.V KOSHI HARI SHINAYAKASA FUKURAMI SHARI KISHIMI Example 2 5.75 6.02 3.87 4.36 6.80 3.42 Example 3 4.63 3.49 6.55 3.84 4.82 4.46

division Friction fastness (grade) Wash fastness (grade) Daylight fastness
(class) Dimensional change rate dry Wet Fading pollution
(Co) pollution
(P) slope Weft Example 2 4-5 4-5 4-5 4-5 4-5 3 1.0 1.1 Example 3 4-5 4-5 4-5 4-5 4-5 4 0.3 0.4

DESCRIPTION OF SYMBOLS 1 Polyester Unstretched Filament 2nd 1st High Roller
3: Hot Plate 4: 2nd High Roller
5: interlace nozzle 6: winding roller

Claims (4)

Ultra-thin fabric manufacturing polyester low-shrink filament yarn, characterized in that after passing the polyester unstretched filament wound on the first gourd roller, passed through a hot plate, and passed through the second gourd roller, interlaced and then wound Way.
The method according to claim 1, wherein the polyester unstretched filament is passed through a first high heat roller at 85 to 95 ° C. 6 to 8 times, and then passed through a hot plate at 200 ° C. to 230 ° C., and then to a second high heat roller at room temperature. Ultra-thin fabric fleece filament for ultra-thin fabrics, characterized by winding at 550-650m / min after interlacing with an air pressure of 1.25-1.75㎏ / ㎠ after passing through an overfeed rate of 0.95-0.99 with ~ 8 windings Manufacturing method.
The method of claim 1, wherein the polyester unstretched filament has a strength of 2.9-3.2 g / d, elongation 10-14% and single yarn fineness of 2.5-3.0d.
The method of claim 1, wherein the low shrinkage filament yarn has a strength of 4.81 ~ 4.96 g / d, elongation 23.3 ~ 26.0%, shrinkage 2.8 ~ 3.6%, maximum thermal stress 0.8 ~ 0.9g / d and single yarn fineness 1.5 ~ 2.0d Method for producing a polyester low shrink filament yarn for ultra-thin fabric manufacturing.

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