KR20160002455A - Polyamide Polyester Split-type Fine Composite Fiber And Woven Knit Fabric - Google Patents

Abstract

The present invention relates to a splittable conjugate fiber, which is an aliphatic polyamide copolymer composed of nylon 6 and nylon 46 on one side, a content of 20 to 50% by weight, and the other is a polyester having no affinity with a polyamide copolymer, , Polyolefin (polystyrene), and polystyrene, and 50 to 80% by weight of the splittable conjugate fiber.

Description

[0001] The present invention relates to a polyamide polyester splittable composite fiber and a woven fabric,

More particularly, the present invention relates to a splittable conjugate fiber having soft touch and shrinking effect, and more particularly, it relates to a splittable conjugate fiber having a soft touch and a shrinking effect, To improve the tear strength and dye fastness.

Attempts to develop sensibility like synthetic fibers in synthetic fibers have been continuously studied and developed with the advent of new synthetic fibers in the 1980s. Among these fibers, those that exhibit the most natural tactile sense are those of the split microfiber made of polyamide and polyester. It is excellent in soft feel and soft feeling of polyester with nylon composite. However, in such split microfiber yarns, only the tactile characteristics of the finely divided fibers are emphasized and tend to be excessively biased toward the use of outwear clothing such as trench coats and down jackets. Recent trends are demanding to expand the market for life and industrial use by utilizing the soft feel that is the advantage of microfiber.

In order to use the split microfiber yarn for the combined use of clothing, life, and industrial, it is advantageous to increase the density of the fabric and the knitted fabric first. In order to satisfy this, the shrinkage ratio of the microfiber yarn must be maximized. In addition, the shrinkage ratio should not be maximized, but a complete division should be made uniformly. In the case of complete division, the method of preparing the polymer should be considered so as to improve the tear strength, in which a plurality of divided microfiber yarns are sharply reduced in tear strength due to unevenness of shrinkage and monofilament of monofilament.

 As a method of maximizing the shrinkage ratio of the microfine yarns, there are a chemical shrinkage enhancing method by chemical treatment and a shrinking shrinkage by changing the composition of the yarn. First, a method of maximizing the shrinkage rate with a chemical is disclosed in Patent Publication 10-2010-0084227. This method is about maximizing the shrinkage rate by using benzyl alcohol as a swelling agent of polyamide. This technology has the disadvantage of drastically reducing the production amount, not only the production cost is very high, but also pollution problem caused by benzyl alcohol.

On the other hand, in Patent Document 10-2010-0016043, in order to solve the above-mentioned problem, one polyamide composition is a technique of using a copolymer in which aliphatic nylon and aromatic nylon are mixed to increase the shrinkage ratio in the yarn state.

In this patent, the high shrinkage effect for high density depression is excellent. However, this patent also has disadvantage that benzyl alcohol is used for the division and shrinkage of 30% or more and density control of the fabric due to high shrinkage The tear strength of the fabric after the split shrinkage sharply decreases, and friction and durability are deteriorated.

Japanese Patent Laid-Open No. 5012646 proposes a technical content of a polyamide polyester microparticulate microparticle production method using nylon 66 based on nylon 6 as a copolymer in an amount of 2 to 30% Although the excellent high shrinkage effect by the use of the stable chemical is excellent, since the shrinkage ratio of the yarn itself is high, the division and the high shrinkage proceed at the same time, and there are many defects in the use of the fabric and the knitted fabric due to the problem of the non- Particularly, when the shrinkage ratio exceeds 25%, the tear strength problem due to the difference in the shrinkage ratio between the divided polyester part and the nylon part still can not be solved. Particularly, the nylon portion has a high proportion of derived from the polyester segment, and the degree of contamination of the nylon portion when dyed with the disperse dye is large, thereby showing a lot of improvement in the light fastness portion. Therefore, development for clothes is easy, but there is a limit to development in use for living and industrial use.

Therefore, the technology of this patent is required to develop yarns that have such shortcomings as maximizing the shrinkage ratio, achieving uniform division and complete division, improving tear strength and improving dye fastness.

The present invention maximizes smooth touch, which is an advantage of microfiber, which is a conventional split fiber, and also complements the denseness, durability and frictional resistance of the fabric, which is a disadvantage, The inventors of the present invention have found that the fiber compositions produced by using the yarns of the present invention can be used not only in a specific post-processing but also in the same dyeing process as existing polyamide and polyester split type composite fiber microfiber , And aims to manufacture superior products for daily industrial use, not just for clothing.

In order to accomplish the above object, the present invention provides a separable conjugate fiber comprising an aliphatic polyamide copolymer composed of nylon 6 and nylon 46 on one side and having a content of 20 to 50% by weight and an affinity with the polyamide copolymer The present invention provides a splittable conjugate fiber comprising 50 to 80% by weight of a polymer containing at least one of a polyester, a polyolefin and a polystyrene.

The present invention also provides a splittable conjugate fiber characterized in that the weight ratio of nylon 6 to nylon 45 is 80:20 to 95: 5.

Further, the present invention provides a splittable conjugate fiber characterized by adding a lubricant or a nucleating agent to an aliphatic polyamide.

Also, the present invention provides a splittable conjugate fiber characterized in that the content of the lubricant is 200 to 1000 ppm.

Also, the present invention provides a splittable conjugate fiber characterized in that the content of the nucleating agent is 200 to 1000 ppm.

Also, the present invention provides a splittable conjugate fiber characterized in that the lubricant comprises at least one of EBS wax, stearic acid, fatty acid ester, and fatty acid amide-based metal fatty acid.

In addition, the present invention provides a splittable conjugate fiber characterized in that at least one kind of nucleating agent is contained in Talc, aluminum oxide, and silicon dioxide.

Further, the present invention provides a knitted fabric manufactured using the splittable conjugate fiber.

The present invention is to provide a composite fiber microfiber for maximizing smooth touch, which is an advantage of the split type composite fiber microfiber, and for improving the compactness, durability and frictional resistance of the fabric.

Further, by using the split type conjugate fiber micro-fibers of the present invention, it is possible to obtain a very soft feel, volume feeling and high density effect through the same dyeing process as conventional polyamide / polyester split type composite fiber micro- And has an effect of providing a fabric excellent in color development, durability, and abrasion resistance.

Further, by using a copolymer composition of nylon 6 and nylon 46 which are all aliphatic polyamides as one polyamide component of the split type conjugated fiber microfiber, it is possible to obtain not only soft touch but also high denseness and durability due to copolymerization with nylon 46 And thus it is possible to expect a reduction in production cost and an increase in the production amount, and it is possible to expect the effect of increasing the amount of benzyl alcohol By omitting the processing, the environmental problem can be solved.

In addition, the present invention has the effect of increasing the uniformity of the division and the partitioning rate by adding a lubricant to one fatty acid polyamide of the split type conjugated fiber microfiber, or by adding a nucleating agent to improve the tear strength, color and light fastness of the product.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As used herein, the terms "substantially", "substantially", and the like are used herein to refer to a value in or near the numerical value when presenting manufacturing and material tolerances inherent in the meanings mentioned, Absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure.

In producing split type composite fiber microfine yarns, a nylon copolymer is used, one of which is an aliphatic polyamide. The nylon copolymer is a nylon 6 and nylon 46 copolymer, and a copolymer having a nylon 46 content of 5 to 20% A polyamide composition prepared by adding 200 to 1000 ppm of EBS WAX and 200 to 1000 ppm of a nucleating agent such as Talc and the other being composed of a polyester, a polyolefin, and a polystyrene polymer having no affinity with a polyamide copolymer It is intended to improve the uniformity, tear strength and dye fastness of the split microfibers, which are typical disadvantages of existing microfibers.

The aliphatic polyamide portion is based on nylon 6 and is copolymerized with an appropriate proportion of nylon 46 to prepare a split type composite fiber microfiber with another component, polyester. Polyesters are not compatible with polyamide copolymers and can be used as polyolefins or polystyrenes and polymers.

The purpose of copolymerizing nylon 46 is to maximize the shrinkage ratio after splitting to impart volume feeling and coating depression, thereby basically imparting suitability for living use. Nylon 66, nylon 610, and nylon MXD 6 are used for the copolymerized nylon. Nylon 46 has higher viscosity than nylon 6 and 66, and is superior in heat resistance, abrasion resistance and dyeability. It is soft and thinner Nylon 46, which has a very high melting point, is advantageous in terms of radiation flow with polyester and has an effect on strength enhancement, and can be used as a substitute for conventional nylon 66.

 In the production of the polyamide copolymer, the higher the content of nylon 46, the greater the shrinkage, coating and volume effect. If the content exceeds 20% by weight, however, the defective fairness and fractionation rate of the preparation improves sharply. On the other hand, Sufficient durability can not be expected.

In addition, when the split polyolefin polyolefin is copolymerized with the amide portion to increase the shrinkage ratio of the microfine yarn, the shrinkage rate sharply increases, and the split and tear strength tends to become poor. In general, when the shrinkage ratio is high, the tear strength of the fabric is increased, whereas in the case of the split yarn, the tear strength is decreased. It is presumed that this is caused by a rapid shrinkage deviation of the divided polyester portion and the polyamide portion.

In order to solve such a problem, the present invention has developed a technique of adding a lubricant or a nucleating agent to a nylon copolymer which is a part of a split yarn.

In general, the processability of polymeric materials has limitations to improve through changes in parent molecular weight, control of molecular weight, and molecular structure. In order to improve the processability, additives such as a lubricant Should be used. In addition, these lubricants can smooth and gloss the surface of the finished product. These lubricants are intended to control the inhibition of partitioning due to the high shrinkage ratio. Examples of the nucleating agent include EBS wax, stearic acid, fatty acid ester, or fatty acid amide-based metal fatty acid.

Nucleating agents are widely used as prescriptions for controlling high-order structures. In order to realize performance and functions suited to the intended use of the product, the polymer primary structure such as molecular weight, molecular weight distribution, composition distribution and stereoregularity, crystal structure, Phase structure and the like of the final product. Especially, the former is affected by the catalytic or polymerization process and the latter by the processing technology.

The role of the nucleating agent is to prescribe the nucleating agent to improve the tear strength, dye fastness and color transparency, and improve rigidity, transparency, gloss and shortening the molding cycle. Further, the crystallization speed is increased to shorten the cooling time at the time of molding.

Talc, aluminum oxide, or silicon dioxide are used as the nucleating agent. In particular, Talc improves the stiffness and heat distortion temperature in proportion to the addition amount, and the shrinkage anisotropy is smaller than that of organic nucleating agent.

The higher the content of the lubricant and the nucleating agent, the better the desired characteristics. However, commercialization of the lubricant and the nucleating agent is difficult because the processing of the lubricant and the nucleating agent may be more difficult if the emulsion exceeds 1000 ppm. On the other hand, the addition of less than 200 ppm did not have a significant effect.

The present invention can be applied to the conventional split microfine yarn production method, and it is expected that the use of the split microfiber yarn which has been limited to garments can be extended to the life of the user, thereby contributing to a larger market of microfiber yarns.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

A polyamide copolymer obtained by mixing 500 parts by weight of EBX WAX and 500 parts by weight of Talc, which is a lubricant, at the same time as mixing the polyamide part of one side of the split microfiber with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 , And the other part was made of a polyester SEMI DULL (TiO2: 0.3%) having an IV of 0.62 and a polyamide component and a polyester ratio of 30:70, spinning at a spinning temperature of 290 DEG C and spinning speed of 3500 m / To emit yarn. At this time, the DRAW RATIO is 2.6, the temperature of the goggle roller is 60 degrees, and the temperature of the goggle roller is 120 degrees. The fineness of the yarn is 75 denier and the number of filaments is 24.

By using the thus-produced yarn, a sizing operation is performed to prepare a warp weaving operation. Sizing was performed using a small appliance manufactured by Suzuki of Japan, and PVA paste was used as the base resin. After the sizing work, I also worked on a canonical work using a one-on-one match made by the same company. The 700-type air-jet loom manufactured by Toyoda was used for weaving, and the developed yarn of the same grade as that of the warp yarn was used. The woven fabrics were soaked in 10% aqueous sodium hydroxide solution at room temperature, and after the fabric was squeezed with a fader, the fabric was wound around a small roller, and after 12 hours of sealing After aging, rinse after washing, dry, and dye at 130 ° C. At this time, only the polyester part is dyed using disperse dye.

Example 2

 The procedure of Example 1 was repeated except that the ratio of nylon 6 of RV 2.8 and nylon 46 of RV 3.3 in the polyamide portion of one side of the split microfiber was 95: 5.

Example 3

The procedure of Example 1 was repeated except that the ratio of nylon 6 of RV 2.8 and nylon 46 of RV 3.3 in the polyamide portion of one side of the split microfiber was 85:15 by weight.

Example 4

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 and simultaneously using a polyamide copolymer added with 200 ppm of activator EBX WAX and 200 ppm of nuclear agent Talc And the other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of polyamide component and polyester was 30:70.

Example 5

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20, and a polyamide copolymer obtained by adding 1000 ppm of EBX WAX and 1000 ppm of lighter EBX WAX And the other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of polyamide component and polyester was 30:70.

Example 6

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 and simultaneously with 500 ppm of EBX WAX as a lubricant and 500 ppm of Talc as a nucleating agent And the other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of the polyamide component to the polyester was 20:80.

Example 7

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 and simultaneously with 500 ppm of EBX WAX as a lubricant and 500 ppm of Talc as a nucleating agent And the other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of the polyamide component and the polyester was 50:50.

Comparative Example 1

The polyamide portion as one portion of the split microfiber was made of nylon 46 alone of RV 3.3 and the other portion was made of polyester SEMI DULL (TiO 2: 0.3%) of IV 0.62, and the ratio of polyamide component to polyester was 55: 45 was used as the catalyst.

Comparative Example 2

The polyamide part as one part of the split microfiber was used as a polyamide copolymer having a weight ratio of 70:30 of nylon 6 of RV 3.3 and nylon 46 of RV 3.3 and the other part of a polyester SEMI DULL : 0.3%), and the ratio of the polyamide component to the polyester was 55:45.

Comparative Example  3

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20, and a polyamide copolymer prepared by adding 2,000 ppm of an activator EBX WAX and 2,000 ppm of a nuclear agent Talc And the other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of polyamide component and polyester was 55:45.

Comparative Example 4

One polyamide segment of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 and a polyamide copolymer without added lubricant and nucleating agent was used and the other part was mixed with IV 0.62 in terms of polyester SEMI DULL (TiO2: 0.3%), and the ratio of the polyamide component and the polyester was 60:40.

Comparative Example 5

A polyamide copolymer obtained by mixing 500 parts by weight of EBX WAX and 500 parts by weight of Talc, which is a lubricant, at the same time as mixing the polyamide part of one side of the split microfiber with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 , The other part was IV 0.62 polyester SEMI DULL (TiO 2: 0.3%), and the ratio of the polyamide component and the polyester was 60:40.

Comparative Example 6

One polyamide portion of the split microfiber was mixed with nylon 6 of RV 3.3 and nylon 46 of RV 3.3 at a weight ratio of 80:20 and simultaneously with 500 ppm of EBX WAX as a lubricant and 500 ppm of Talc as a nucleating agent And the other part was made of polyester 0.63 SEMI DULL (TiO2: 0.3%), and the ratio of the polyamide component and the polyester was 10:90.

  After dyeing, the final fabric width was fixed using a pin tenter and various quality of fabric and yarn were measured.

1. Measurement of shrinkage of fabric

   The shrinkage ratio is measured by measuring the length before and after processing of the fabric using the developed split microfiber.

W (%) = L0 - L1 / L0 x 100

       LO: Length before processing of fabric

       L1: Length after processing of fabric

2. Measuring the fractionation rate: Leica Laborlux 12 pols

Samples of the treated knitted fabric after the dyeing process (after the dividing process) were taken and the fiber cross section was observed with a polarizing microscope (Leica, Laborlux 12 pols). By comparing the state in which the polyester layer is completely separated from the polyamide layer, it is calculated by dividing 24 filaments into 8 pieces and converting into 192 strands in terms of 100%.

3. Tear strength of fabric is measured by KSK 0536.

4. Dye fastness: Wash fastness ksk 0430 was measured by using Launder O meter with 5 x 10 cm, 5 g / l of detergent, 100 ml of liquid, and 50 ° C. for 30 minutes.

5. Daylight fastness was measured by KSK0700 carbon arc method. The arc voltage was 125 V, the arc current was 15 A, and the results were checked after 20 hours of operation of the carbon arc.

6. The tear strength of the fabric was measured with KSK 0536, and the tactile sensation of the coating was evaluated by comparing the emotional evaluation of the KES-FB type measuring device and the judging device.

7. Fairness evaluation was performed based on the LP1A rate during the week.

The measurement results are shown in Table 1 below.

Specific items Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6



Polymer
Furtherance
Total percentage of polyamide (% by weight)

30

30

30

30

30

20

50

55

55

55

60

60

10 Nylon 6 (weight ratio)
80
95
85
80
80
80
80
100
70
80
80
80
80 Nylon 46 (weight ratio)
20
5
15
20
20
20
20
0
30
20
20
20
20 Lubricant Content (ppm) 500 500 500 200 1000 500 500 500 500 2000 0 500 500 Nuclear Content (ppm) 500 500 500 200 1000 500 500 500 500 2000 0 500 500 Radiation fairness LP1A ratio (%)
96
97
96
96
95
96
96
87
70
45
97
85
80 Fabric split ratio slope(%) 98 95 95 94 100 95 92 96 85 100 75 90 92 Weft (%) 96 96 97 96 100 94 90 95 82 100 70 90 92 Phosphorus strength Slope (N) 22 20 21 21 22 22 21 14 23 23 16 24 12 Weft (N) 20 19 20 21 20 20 20 15 21 20 15 22 11 Fabric shrinkage slope(%) 30 26 28 30 29 29 30 12 40 31 28 28 10 Weft (%) 28 24 26 28 28 27 28 10 38 29 26 26 8

Fastness
Light fastness (grade) 6 6 6 6 6 6 5 3 6 6 4 2 5 Wash fastness (grade) 4 to 5 4 to 5 4 to 5 4 to 5 4 to 5 4 to 5 4 to 5 2 to 3 4 to 5 4 to 5 3 to 4 2 to 3 4 to 5 Coating feeling Emotional evaluation Good Good Good Good Good Good Good Bad Good Good Bad Good Bad

Looking at the data in Table 1 above,

In Comparative Example 1, the content of polyamide exceeded 50% by weight of the upper limit, and the content of 55% by weight and nylon 46 was 0% by weight, which was outside the lower limit of 5 to 20% (Tapering, weft), fabric shrinkage (warp, weft), and fastness values in Comparative Examples 1, 2, and 3, which are poor in coating sensitivity evaluation.

 Comparative Example 2 shows that the content of polyamide was 55% by weight in the upper limit of 50% by weight and the content of nylon 46 was 30% by weight in the examples, which was out of the upper limit of 5 to 20% , The spinning fairness and fabric split ratio values were lower than those of Examples 1, 2 and 3, but the shrinkage rate of the fabric was rather high. However, the feeling of coating does not change.

Comparative Example 3 shows that when the content of polyamide exceeds 55 wt% of the upper limit of 50 wt% and the content of the lubricant and the nucleating agent is 2000 ppm out of the upper limit of 200 to 1000 ppm of Examples 4 and 5, Is 45%, which is lower than the values of Examples 4 and 5. However, the feeling of coating does not change.

In Comparative Example 4, when the content of polyamide was 60 wt%, the content of polyamide exceeded 50 wt% of the upper limit, and the content of the lubricant and nucleating agent was 0 ppm, which was outside the lower limit of 200 to 1000 ppm of Examples 4 and 5, The tear strength, the tear strength and the fastness are lower than those of Examples 4 and 5, and the coating sensitivity is poor in the sensibility evaluation.

Comparative Example 5 shows lower values in comparison with Examples 6 and 7 in terms of spinning processability and fastness when the content of polyamide is 60 wt%, which is outside the upper limit of 50 wt%, as compared with the Examples. However, the coating rate remains unchanged.

In Comparative Example 6, as compared with the Examples, when the content of polyamide was 10% by weight, which was out of the lower limit of 20% by weight, the radial processability, tear strength and fabric shrinkage ratio were lower than those of Examples 6 and 7 The coating sensitivity is poor in the sensibility evaluation.

Therefore, in Comparative Examples 1 and 2, which were out of the total content ratio of polyamide and the proper weight ratio of nylon 46 in polyamide, the total content ratio of polyamide and Comparative Examples 3 and 4, which were outside the titration amount of nucleating agent and nucleating agent, It can be seen that the measured values of Comparative Examples 5 and 6, out of the ratio, deviate from the general effect range of the embodiment.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. .

Claims (8)

In the splittable conjugate fiber, an aliphatic polyamide copolymer composed of nylon 6 and nylon 46 on one side and having a content of 20 to 50% by weight, and the other of which is a polyester, a polyolefin ( polyolefin, and polystyrene, and 50 to 80% by weight of the polymer.
The method according to claim 1,
Wherein the aliphatic polyamide has a weight ratio of nylon 6 to nylon 45 of 80:20 to 95: 5.
The method according to claim 1,
A splittable conjugate fiber characterized by adding a lubricant or a nucleating agent to the aliphatic polyamide.
The method of claim 3,
Wherein the content of the lubricant is 200 to 1000 ppm.
The method of claim 3,
Wherein the content of the nucleating agent is 200 to 1000 ppm.
The method of claim 3,
Wherein the lubricant comprises at least one of EBS wax, stearic acid, fatty acid ester, and fatty acid amide metal fatty acid.
The method of claim 3,
Wherein the type of the nucleating agent is one or more of Talc, aluminum oxide, and silicon dioxide.
8. A method of manufacturing a semiconductor device according to any one of claims 1 to 7,
A knitted fabric manufactured by using split type conjugated fibers.