KR101427225B1 - Conjugate Polyester Filaments with Excellent Cool Touch Effect and Stretchability and Process of Preparing Same - Google Patents

Abstract

The present invention relates to a composite fiber obtained by composite spinning two kinds of polymers having different shrinkability in side-by-side form, wherein one component is a high-viscosity polymer and the other component is a low shrinkage Polymer. The volume ratio of the high-condensing polymer to the low-shrinkable polymer is preferably in the range of 20:80 to 80:20. The polyester conjugate fiber is subjected to combined spinning in a side-by-side form with a volume ratio of the high-shear polymer to the low-shrinkable polymer in the range of 20:80 to 80:20, and the composite spinning yarn is subjected to flame- . ≪ / RTI >
(1) 0.2? K value? 0.8
(2) 95 占 Twist Angle? 112.5 占
(3) 180 占 폚? Primary heater temperature? 230 占 폚
(4) Primary heater temperature - 50 ° C ≤ Secondary heater temperature ≤ Primary heater temperature - 10 ° C
(5) 1.2? Stretching ratio?
Where K is the ratio of Untwist tension / twist tension, and Twist Angle is the crossing angle between Nip Twist Belt.

Description

TECHNICAL FIELD [0001] The present invention relates to a stretchable polyester conjugate fiber having excellent cooling feel and a method for producing the same,

The present invention relates to a stretchable polyester conjugate fiber. More specifically, the present invention relates to a stretchable polyester conjugate fiber excellent in refreshing feeling and a method for producing the same.

Since the Industrial Revolution, the Earth's carbon dioxide has increased by more than 3,300 tons per year, and the average temperature of the Earth rises by 0.5 degrees centigrade for a century (National Climate Data Statistics Center). In Korea alone, the spring and fall periods, which correspond to the winter season, are shortened due to the global warming, and the summer time, which is hot, is gradually increasing. At the same time, limited demand for fossil fuels is fueling rising energy costs. In the end, human clothing and clothing began to change in the aftermath, and in particular, materials that can feel a cool cooling sensation due to the long hot weather influence became more attractive, and casual trend And the demand for garment materials having appropriate stretch properties are increasing.

Korean Patent Laid-Open Publication No. 1996-0023341 discloses a technique for producing a non-marred twisted yarn of general polyester yarn, and more particularly, to a twisted yarn processing technique in which a yarn in a limited fineness range is subjected to specific primary and secondary Discloses a technique for expressing a unique gloss and touch feeling similar to that of natural horses by setting the heater temperature and the twisting tension ratio. However, the fiber produced by this technique can exhibit a rough cold feeling similar to that of hemp, but does not exhibit elasticity, and has a irregular appearance such as natural hemp due to the unique structure of unhindered marginal portion and mixed marginal portion. Appearance is recognized as a type of tone, and this tone is generally irregular in demand and limited in application depending on fashion trend rather than general purpose clothing.

Korean Patent No. 0252702 discloses a method for manifesting a dark skin feeling and a dyestuff effect such as natural margarine by twisting under a high flammability temperature and a specific twisting tension by using a polyester salt reflection. The yarn produced by this method has a similar appearance to a natural irregular fineness Linen, because the yarn has a different dyeing property and a thicker and thinner shape due to the characteristics of the yarn of the yarn of the yarn and the fusing condition. However, there is a feeling of coolness, but it does not exhibit elasticity, and irregular appearance, which is similar in shape to appearance, due to the nature of the season, it changes the length of the irregular tone preference. It is difficult to use.

Korean Patent Laid-Open Publication No. 1999-006239 discloses a twisted yarn which is twisted using a false twist yarn and then subjected to a low-temperature heat treatment using a heat treatment apparatus, and then twisted and twisted in a twisted twisted yarn A yarn having a bilateral structure is produced by carrying out flammability, and a fabric having excellent stretchability and refreshing feeling is disclosed. However, the present invention uses a false twist yarn manufactured through a quadratic process instead of a general stretcher or a non-twisted yarn, and a manufacturing cost is increased by performing a first twist, a second twist, and a false twist two times in a low- . In addition, there is a high possibility that the deviation occurs due to an increase in the quality deviation during the course of the three-step process of the twisting process, the heat treatment process, and the twisting process and the twisting process, and the productivity is deteriorated because the process speed is very low. It is difficult for the speaker to secure smoke facilities.

Korean Patent Laid-Open Publication No. 2004-0037995 discloses a method for producing a polyester yarn having excellent stretchability by using two different kinds of yarns. The fiber produced by this method has a shorter production process than the process disclosed in the above-mentioned Japanese Patent Laid-Open No. 1999-006239, but the production amount is very small and the stretching ratio or tension can not be controlled during false twisting.

Korean Patent Publication No. 1996-0023302 discloses a side-by-side conjugated fiber excellent in winding-up property. This method is a method for producing a crimped yarn in which two types of polyester polymers are supplied in different temperature ranges, and then spun and wound to develop a magnetic elongation rate to form a crimped yarn. This crimped fiber has the advantage of exhibiting excellent stretchability without the process of imparting twist. However, since the crimped fiber itself exhibits a smooth emotional characteristic, it does not exhibit a refreshing feeling, and thus requires an additional process for imparting a high level of kink (lecture).

Korean Patent No. 0683479 describes the manufacture of stretchable majo fibers. In the case of the material yarns used, since a partially oriented yarn in which two kinds of polymers having relatively high and low polymer viscosities are simultaneously co-spun is used, The polymer properties of the polymer easily become weak and the elasticity thereof tends to decrease sharply.

In order to solve the problems of the prior art, it is necessary to impart elasticity and refreshing feeling to a single working process rather than a plurality of processes, and to provide a refreshing feeling while maintaining the appearance of a uniform twist rather than an irregular mase And to develop a polyester conjugate fiber of the present invention having excellent stretchability.

It is an object of the present invention to provide a knitted fabric which can be used for general and general purpose clothes, not limited to special demands and uses such as melange products or tone products, The present invention relates to a polyester composite fiber.

Another object of the present invention is to provide a novel polyester conjugate fiber which exhibits a cooling sensation at the same time as an excellent stretchability even in the state of a single fiber even without a separate stretch yarn, .

These and other objects of the present invention can be achieved by the present invention which is described in detail below.

The present invention relates to a composite fiber obtained by composite spinning two kinds of polymers having different shrinkability in side-by-side form, wherein one component is a high-viscosity polymer and the other component is a low shrinkage Is a polymer. The high water-swellable polymer is a polyester copolymer resin having improved shrinkability, and the low shrinkable polymer is a polyester polymer not copolymerized

The volume ratio of the high water-swellable polymer to the low shrinkable polymer is preferably in the range of 20:80 to 80:20.

The highly water-swellable polymer is preferably a polyester copolymer resin comprising a component selected from the group consisting of isophthalic acid, bisphenol A-ethylene oxide and neopentyl glycol and PP-dihydroxy diphenylsulfone glycol, and the low shrinkable polymer Is preferably a non-copolymerized polyester polymer. The content of isophthalic acid, bisphenol A-ethylene oxide, or neopentyl glycol used in the highly hydrolyzable polymer is from 0.5 mol% to 10 mol% of the total yarn.

The stretchable polyester conjugate fiber excellent in the cooling sensation according to the present invention is obtained by composite spinning in the side-by-side form with the volume ratio of the high-shear polymer to the low-shrinkable polymer in the range of 20:80 to 80:20, Characterized in that the yarn is produced by a step of twisting the yarn under the following false twisting conditions:

(1) 0.2? K value? 0.8

(2) 95 占 Twist Angle? 112.5 占

(3) 180 占 폚? Primary heater temperature? 230 占 폚

(4) Primary heater temperature - 50 캜 - Secondary heater temperature - Primary heater temperature - 10 캜

(5) 1.2? Stretching ratio?

Where K is the ratio of Untwist tension / twist tension, and Twist Angle is the crossing angle between Nip Twist Belt.

The polyester conjugate fiber of the present invention produced as described above is characterized in that the elongation at break of the high hydrolizable polymer and the low shrinkable polymer is 80% to 180%, and the remaining twist in the fiber length direction is 70% or more. The single fiber fineness of the composite fibers is preferably 2.0 to 6.0 denier.

Hereinafter, the present invention will be described in detail.

The polyester fiber according to the present invention can maintain a uniform twist shape similar to the appearance of a yarn after a plurality of steps by a single twisting process without taking a plurality of steps such as twist-twist-twist, And it is not an irregular form of general fusion and warpage (machining). Therefore, it can be widely used for general clothing applications other than tone or melange products, and exhibits excellent cooling feel and stretchability due to residual twist and fusion mode , A composite fiber having good dye uniformity can be provided.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable polyester conjugate fiber, and relates to a stretchable polyester conjugate fiber excellent in a refreshing feeling and a method for producing the same.

The stretchable polyester conjugate fiber excellent in the cooling sensation according to the present invention is a conjugate fiber prepared by co-spinning two kinds of polymers having different shrinkability in a side-by-side form, one component being a high-viscosity polymer , And the other component is a low shrinkable polymer.

In the case of producing a crimped fiber through a two-component side-by-side composite spinning method, a method of using a difference in viscosity of two components is generally used, but in the present invention, a yarn exhibiting crimp and elongation properties by a difference in shrinkage ratio is used . It was invented by grasping that the shrinkage ratio difference two-component composite spinning material company exhibits better stretchability and refreshing feeling than the viscous two-component composite spinning yarn in a specific flammable condition region.

The high water-swellable polymer is a polyester copolymer resin having improved shrinkability, and the low shrinkable polymer is a polyester polymer not copolymerized

The volume ratio of the high water-swellable polymer to the low shrinkable polymer is preferably in the range of 20:80 to 80:20.

The highly water-swellable polymer is preferably a polyester copolymer resin comprising a component selected from the group consisting of isophthalic acid, bisphenol A-ethylene oxide and neopentyl glycol and PP-dihydroxy diphenylsulfone glycol, and the low shrinkable polymer Is preferably a non-copolymerized polyester polymer. The content of isophthalic acid, bisphenol A-ethylene oxide, or neopentyl glycol used in the highly hydrolyzable polymer is from 0.5 mol% to 10 mol% of the total yarn.

The difference in the shrinkage ratio between the two polymers differs depending on the heat treatment degree, the degree of stretching, the spinning condition, the flammability condition, and the stretching condition, and since there are two components attached to one cross section after the spinning, have. Therefore, it can be said that it is effective to define the two components as a fraction. That is, when the two kinds of polymers having different shrinking properties are combined in a side-by-side spin-coating, the volume ratio of the high-viscosity condensing polymer to the low-shrinkable polymer is 20:80 to 80:20, and bisphenol A-ethylene oxide, isophthalic acid, It is preferable that the content of neopentyl glycol is 0.5 mol% to 10 mol% of the total yarn.

The stretchable polyester conjugate fiber excellent in the cooling sensation according to the present invention is obtained by composite spinning in the side-by-side form with the volume ratio of the high-shear polymer to the low-shrinkable polymer in the range of 20:80 to 80:20, Which is produced by a step of spun under the following tentative processing conditions:

(1) 0.2? K value? 0.8

(2) 95 占 Twist Angle? 112.5 占

(3) 180 占 폚? Primary heater temperature? 230 占 폚

(4) Primary heater temperature - 50 캜 - Secondary heater temperature - Primary heater temperature - 10 캜

(5) 1.2? Stretching ratio?

Where K is the ratio of Untwist tension / twist tension, and Twist Angle is the crossing angle between Nip Twist Belt.

The polyester conjugate fiber of the present invention produced as described above is characterized in that the elongation at break of the high hydrolizable polymer and the low shrinkable polymer is 80% to 180%, and the remaining twist in the fiber length direction is 70% or more. The single fiber fineness of the composite fibers is preferably 2.0 to 6.0 denier.

It is preferable to set the fineness of the yarn single yarn spinning constituted of the above polymers to 2.0 to 6.0 denier to exhibit stretching property. If the elongation at break of the yarn is 80% or less, it is difficult to produce a refreshing feeling under the false twisting condition of the present invention. When the yarn elongation becomes 180% or more, Making it difficult to use it for clothes.

Next, a twisting process should be carried out so as to exhibit a uniform appearance and a stretchability by using a material satisfying the above-mentioned physical properties. In this case, the remaining twist portion should be formed with 70% or more of the total fiber length It is important to do. The residual twist refers to a state in which the twist is twisted at a constant angle with respect to the longitudinal direction of the fiber. This is caused by the transmission of the rotational force of the twist unit during the twisting process. When the specific temperature and proper tension are set, maintain. In addition, the volume of the non-twisted portion should not be increased. If the difference in volume between the twisted portion and the non-twisted portion is large, the outer appearance of the garment is irregular and looks like a tone. To this end, it is important to maintain certain torsional conditions so that the crimp of the uncoated portion does not bulky and the volume is reduced. As a result, it is necessary to twist the following areas in order to reduce the high remaining twist ratio, the non-twisted portion, and the residual twisted portion volume difference.

Generally, the side-by-side type composite yarn having a viscosity difference is not so difficult to stretch and stretch because stretchability increases with an increase in stretch ratio in a stretching machine, but the fabric thus produced does not show a refreshing feeling due to its smooth shape. Accordingly, there is a case where the stretching process is further carried out after the stretching process. In this case, a satisfactory refreshing sensation can not be obtained due to the unique smooth sensibility. In the process of setting the stretching equipment after re- Problems frequently occur. The present invention satisfies the above-described residual twist in at least 70% and satisfactory effects in the following specific twisting conditions to reduce the volume difference between the twisted portion and the remaining twisted portion.

The draw ratio during the twisting process is very important. Setting the stretching ratio to 1.2 to 1.7 is good for stretchability. If the stretching ratio is 1.2 or less, the stretchability becomes insufficient. If the stretching ratio is 1.7 or more, the deviation of the physical properties of the intervertebral disc is increased and it is difficult to maintain the residual twist ratio of 70% or more.

When the K value is less than 0.2, the intervertebral deviation increases and it becomes difficult to control the tension. When the K value is 0.8 or more, it is difficult to maintain the twisted shape. The angle of twist is an important factor in the stretchability. If it is lower than 95 °, residual torque will be generated and it will be difficult to knit the knit. If it is more than 112.5 °, it will be difficult to maintain the twisted shape. do.

It is important to set the temperature of the primary heater to a temperature that can cause partial surface fusion so that the twist generated by the twist unit can remain. When the temperature is lower than 180 ° C, it is difficult to maintain the twist. When the temperature is higher than 230 ° C, the surface texture becomes too sharp due to excessive fusion and the elasticity is lowered.

The secondary heater temperature should be set in conjunction with the primary heater temperature because the heat received from the primary heater changes the surface fusion of the yarn and the cooling sensation. However, when the temperature of the secondary heater is lower than -50 ° C relative to the temperature of the primary heater, the residual torque is generated and the weaving process is poor and the volume of the non-twisted portion becomes large. Thus, the volume difference between the twisted portion and the non- Tone). On the other hand, when the temperature is higher than -10 ° C relative to the temperature of the primary heater, the surface fusion formed by the setting effect is deformed and the cooling feeling is lowered.

In order to exhibit excellent cooling sensation and stretchability under the above specific treading processing conditions, the characteristics of the material company are important as described above. That is, in the case of general spinning composite spinning yarn, the viscosity of the low viscosity portion is easily deteriorated under the high heat treatment temperature conditions such as the above conditions, and the elasticity is also rapidly deteriorated. In addition, even when the composite radiation yarn of polytrimethylene terephthalate polymer and polyester is used, the same physical property weakness and lack of elasticity phenomenon are exhibited because the melting point of the polytrimethylene terephthalate polymer is 225 ° C., and at the high heater temperature close to the melting point, And the problem of band-type over-fusion dyeing failure occurs. However, when the heat treatment temperature is lowered, partial fusion of the polyester polymer region having a melting point of 250 to 255 ° C can not be formed, so that a sufficient refreshing sensation can not be achieved. Therefore, as described in the opening paragraph, when the shrinkable composite radiation yarn composed of a high shrinkage and low shrinkage polymer, which is not a viscosity difference, is used in the above-described condition, the difference in shrinkage between polymers increases due to heat applied, It is possible to develop a cooling sensation by keeping the twisted property and the expansion and contraction characteristics superior to those of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the embodiment according to the present invention can be modified into various other forms, and the scope of the present invention is not construed as being limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Example

Example  One

Using a copolymer polymer containing neopentyl glycol as a high shrinkage component and using a general polyester polymer as a low shrinkage polymer, a 123% elongated 123% yarn with a single yarn fineness of 3.7 denier was compounded in a 5: 5 ratio of side by side. After that, twist angle of twist angle between twist belt and twist belt was kept at 95 ℃ and K value was 0.5 ℃. The heater temperature was 220 ℃ and 190 ℃ respectively and the stretching ratio was 1.30. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Example  2

The twist angle of the nip twist belt twisted yarn was twist angle between the twist belts at 105 degrees and the K value was 0.7 The heater temperature was set at 220 ° C and 200 ° C, respectively, and the stretching ratio was set at 1.45. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Example  3

The twist angle, which is the intersection angle between the twist belts in air, was 105 degrees, and the K value was the same as that of Example 1, 0.7, respectively. The heater temperature was set to 220 ° C and 210 ° C respectively, and the stretching ratio was set to 1.45. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Comparative Example  One

A high viscosity polymer having a viscosity of 0.70 and a low viscosity polymer having a low viscosity of 0.45 were spun at a ratio of 125 and a monofilament fineness of the same ratio as in Example 1. The nip twist belt twist yarn was cross- The twist angle was maintained at 105 ° and the K value was maintained at 0.7. The heater temperature was set at 220 ° C and 230 ° C respectively, and the stretching ratio was set at 1.45. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Comparative Example  2

Viscosity of 0.70 and a low viscosity polymer of 0.45 were prepared in the same proportions and monofilament fineness as in Example 1, and the residual elongation was measured to be 122%. Then, the nip twist belt twisted yarn was cross-twisted in twist belts The twist angle was 115 ° and the K value was 1.3. The heater temperature was set at 240 ° C and 230 ° C respectively, and the stretching ratio was 1.60. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Comparative Example  3

The twist angle of twisted yarn in the twisted twisted yarn twist belt was 115 degrees and the K value was 1.3 while the twist angle was 1.5 degrees. And the heater temperature was set at 220 캜 and 130 캜, respectively, and the stretching ratio was set at 1.45. Table 1 shows the residual twist ratio, the expansion ratio, and the final sensitivity evaluation result.

Comparative Example  4

Polytrimethylene terephthalate Polymer having a viscosity of 1.02 and a low viscosity polyester polymer having a viscosity of 0.45 were spun at the same ratio and monofilament fineness as in Example 1 to give a residual elongation of 121%. Then, a nip twist belt The twist angle between the air and the twist belt was controlled to 110 degrees and the K value was 0.6, and the heater temperature was set to 240 DEG C and 210 DEG C, respectively, and the stretching ratio was set to 1.45. As a result, welding fusion occurred and sample production was not possible.

How to measure

- Residual twist rate: Ten samples were randomly taken at a length of 10 cm, and the sample was taken in an image analyzer. The fractions of twisted length per 10 cm of unit length were measured and the average value was displayed.

- Elastic modulus: A certain amount of the yarn is wound on a warp reel so that the yarn becomes denier X 4 ÷ 3,000, and the specimen is heat treated at 98 ° C for 20 minutes and then cooled for 4 hours. After measuring the length L1 by hanging 6g of the initial load, add 600g of heavy load and measure the length L2. The expansion / contraction ratio is calculated according to the following equation.

Elastic expansion ratio = (L1-L2) / L1 * 100

- Cooling sensation: The test samples (Examples and Comparative Samples) were compared with 10 samples of normal apparel and 1,200 T / M of the clothing apparel experts as a control group, and sensory evaluation was carried out. The control group was rated on a 10-point scale. The refreshing feeling was rated as ⊚ when the refreshing feeling was 8 or more, ∘ when the score was 7 to 8 or less, △ when the score was 5 to 7 or less,

- Appearance: Appearance of uniform appearance to 10 apparel apparel experts group was evaluated by using the above-mentioned cool feeling control group and general melt-bonded polyester as a control group. The uniform appearance of the control group was 10 points, The sensory evaluation was carried out with an irregular appearance of 0 point. ?,?,?,?,?,?,?, And?, Respectively.

In the above table, Examples 1 to 3 show good cooling sensation and expansion ratio, and when the single yarn fineness of the material yarn is high, the expansion ratio is increased and the appearance is evaluated in a uniform form. On the other hand, in the case of the samples of Comparative Examples 2 to 3 in which the residual twist ratio is less than 50%, it can be seen that the sample shows a significantly poor feeling of refreshing. It can be seen that, in the case of the material yarn, the comparative example 1 using the viscous side-by-side yarn is formed at a low expansion ratio in spite of the twist processing conditions similar to those of the second embodiment. Further, in Comparative Example 3 in which polytrimethylene terephthalate was used as a raw material polymer, permanent truncation occurred in the false twisting process

As shown in Table 1, according to the present invention, it is possible to develop a fiber that exhibits excellent cooling feel and stretchability in a uniform smoothing process in a single smear processing step without going through various process steps. As a result, manufacturing costs can be significantly reduced compared to conventional processes, and the production speed can be more than 20 times higher than the twisting process, which gives twist. Further, since the stretchability is sufficiently exhibited without being combined with the polyurethane-based stretchable fiber or covering or covering, the problem of heat shrinkage due to heat during the post-process during use of the polyurethane fiber and defective stretchability and excessive shrinkage can be solved.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the invention is included in the scope of the invention.

Claims (8)

A composite fiber produced by composite spinning two kinds of polymers having different shrinking properties in a side-by-side form, wherein one component is a high viscosity polymer and the other component is a low shrinkage polymer,
Wherein the volume ratio of the high condensing polymer to the low shrinkable polymer is in the range of 20:80 to 80:20 and the high condensing polymer is selected from the group consisting of isophthalic acid, bisphenol A-ethylene oxide, neopentyl glycol, Wherein the low-shrinking polymer is a polyester polymer not containing a copolymerizable unsaturated bond, and the low-shrinking polymer is a polyester polymer not copolymerized.
The stretchable polyester conjugate fiber according to claim 1, wherein the highly water-swellable polymer is a polyester copolymer resin with improved shrinkage, and the low-shrinking polymer is a polyester polymer not copolymerized.
delete delete The polyurethane foam according to claim 1, wherein the content of isophthalic acid, bisphenol A-ethylene oxide, or neopentyl glycol used in the high water-swelling polymer ranges from 0.5 mol% to 10 mol% Ester conjugate fiber.
The volume ratio of the high-condensing polymer to the low-shrinkable polymer is in the range of 20:80 to 80:20, and the mixed radiation is performed in a side-by-side form; And
Subjecting the composite yarn to spun yarn under the following twisting condition;
The method of producing a stretchable polyester conjugate fiber according to claim 1,
(1) 0.2? K value? 0.8
(2) 95 占 Twist Angle? 112.5 占
(3) 180 占 폚? Primary heater temperature? 230 占 폚
(4) Primary heater temperature - 50 ° C ≤ Secondary heater temperature ≤ Primary heater temperature - 10 ° C
(5) 1.2? Stretching ratio?
Where K is the ratio of Untwist tension to twist tension, and Twist Angle is the angle of intersection between the nip twist belts.
The method for producing a stretchable polyester conjugate fiber according to claim 6, wherein the residual twist in the fiber length direction of the conjugate fiber is 70% or more.
The stretchable polyester composite fiber according to claim 6, wherein the final false-twist yarn obtained by the twisting step has a breaking elongation of 80% to 180% and a monofilament fineness of the composite fiber is 2.0 to 6.0 denier ≪ / RTI >