JP5276966B2 - False twisted yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a false twist yarn most suitable for applications such as swimming wears and underwears, and having excellent anti-transparent properties without problems in practical application in spinning operability and post processing processability. <P>SOLUTION: The false twist yarn comprises a thermoplastic resin such as a polyethylene terephthalate containing 2-10 wt.% of a white pigment such as titanium oxide and 2-10 ppm of a black pigment such as carbon black. Preferably, the yarn contains 0.01-0.07 wt.% of a fluorescent whitening agent besides them, and the average particle diameter of the white pigment is 0.2-1 &mu;m. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to false twisted yarn.

  False twisted yarn is false twisted synthetic fiber such as polyester fiber, but it is bulky, has good strength and elongation properties, and is easy to handle and easy to dry. It is used in all clothing fields.

In recent years, especially in sportswear such as swimwear, tennis wear, leotards, or even thin clothing such as blouses, office uniforms, and white robes, innerwear such as lingerie and foundations cannot be seen through. Performance is needed.
As a method for obtaining such see-through prevention, for example, there is a method of increasing the content of a matting agent such as titanium oxide.
Patent Document 1 uses a core / sheath composite yarn containing 1.0 to 5.0% by weight of a matting agent as a core component and 0.01 to 1.0% by weight of a fluorescent brightening agent as a sheath component. It has been proposed to obtain a see-through preventing property by using a fabric.

JP-A-8-60485

However, in order to increase the content of the matting agent and obtain excellent sheer prevention, it is necessary to contain a large amount of matting agent, and the physical properties of the yarn, such as strength, are reduced, the spinning process, the twisting process In the manufacturing process such as false twisting process and weaving and knitting process, mechanical parts are heavily worn, which is not practical. In addition, the fabric of Patent Document 1 is not sufficient in preventing see-through.
The present invention has been made in view of such a situation, and an object thereof is to obtain a false twisted yarn that is practical and has excellent anti-slipping properties.

That is, the present invention is a garment characterized in that a multifilament using a thermoplastic resin containing 2 to 10% by weight of a white pigment and 2 to 10 ppm of a black pigment is false-twisted, and the expansion / contraction recovery rate is 25% or more. It is the invention which makes the main purpose the false twisted yarn for use . As a preferred embodiment, the white pigment is titanium oxide, the average particle size is 0.2 to 1 μm, the black pigment is carbon black, and the fluorescent brightening agent is 0.01 to 0.00. In addition, the preferred embodiment is that the thermoplastic resin is used for the entire fiber cross-section of the multifilament, and that the false twisted yarn comprising a composite fiber composed of two or more resins is used. In this case, at least one resin of the composite fiber is the thermoplastic resin, and the fiber cross section of the composite fiber has a shape in which the other component is divided into two parts by the component containing the thermoplastic resin. The fiber cross section of the composite fiber has a shape in which the component containing the thermoplastic resin is partially exposed on the fiber surface and is not completely included by the other components. And the like.

  According to the present invention, it is possible to obtain a false twisted yarn excellent in anti-slipping property as well as spinning operability, false twist workability and post-process passability. Such yarns are particularly suitable for sports clothing such as swimwear and sportswear even when dyed in white or light color, and even when they are thin clothing when used for outerwear, Since you can't see the color pattern of the clothing you are wearing, it will be fashionable.

Hereinafter, the present invention will be described in detail. The present invention is a false twisted yarn made of a specific thermoplastic resin.
The thermoplastic resin (polymer) means all polymers having fiber-forming ability that can be synthesized by a polymerization reaction. Specifically, nylon 6, nylon 66, nylon 12, polyamides such as poly-p-phenylene terephthalamide, poly-m-phenylene isophthalamide, polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polylactic acid, Examples thereof include polyolefins such as polyethylene and polypropylene, and polyacryls such as polyacrylonitrile. Of course, it is not limited to these, and other types of polymers can be used. Each polymer is not limited to a homopolymer, and may be a blend, a copolymer, or the like.
Among these polymers, polyester can be preferably used.

The thermoplastic resin used for the false twisted yarn of the present invention needs to contain a specific amount of white pigment. Specifically, it needs to be contained in an amount of 2 to 10% by weight, preferably 3 to 10% by weight, and particularly preferably 3 to 8% by weight.
If the content of the white pigment is less than 2% by weight, the intended anti-slipping effect cannot be obtained. If the content exceeds 10% by weight, troubles in spinning such as single yarn breakage and fluffing are likely to occur, and the surface irregularities of the fibers are severe. Becomes intense.

  The particle size of the white pigment is preferably 0.2 to 1 μm, more preferably 0.2 to 0.8 μm, and more preferably 0.2 to 0.8 μm in consideration of the balance between see-through prevention performance and spinning operability / post-processability. 5 μm is particularly preferable.

  Examples of the white pigment include titanium oxide, zinc oxide, magnesium oxide, aluminum oxide, zirconium oxide, calcium oxide, magnesium oxide, barium sulfate, and silica. Of these, titanium oxide is most preferably used.

  There is no restriction | limiting in particular in the method containing the said white pigment. The most commonly used method is to mix a master chip to which a white pigment has been added at a high concentration in advance with a normal chip and spin it. Even “ordinary chips” contain a small amount (for example, 1% by weight or less) of white pigment.

The thermoplastic resin used for the false twisted yarn of the present invention needs to contain 2 to 10 ppm of black pigment. Examples of the black pigment include carbon black pigments, aniline black pigments, and iron oxide black pigments. Considering versatility and cost, the use of carbon black (CB) is most preferable.

  By containing the black pigment, the fiber see-through preventing effect is significantly improved. When the content of the black pigment is less than 2 ppm, no improvement in the see-through preventing effect is observed. On the other hand, if it exceeds 10 ppm, the blackness (darkness) of the yarn becomes conspicuous, and it becomes unsuitable for applications that require bright yarn such as white and light colors. Considering the balance between thread shedding prevention and whiteness, the black pigment content is preferably 2 to 6 ppm.

  The method for containing the black pigment is not particularly limited. Often used is a method in which a master chip to which a black pigment is added at a high concentration in advance and a normal chip are mixed and then spun. There is also a method in which chips and black pigment are mixed and used for spinning.

  Moreover, it is preferable that the thermoplastic resin of this invention contains a fluorescent whitening agent in a polymer. The use of a fluorescent brightening agent is preferable because it is more excellent in light resistance and dyeing fastness than whitening by post-dying.

  The fluorescent whitening agent here means an original fluorescent whitening agent that is added to the polymer at the time of fiber production, and it is necessary to have something that does not hinder spinnability and stretchability. Can include stilbene fluorescent brighteners, imidazole fluorescent brighteners, imidazolone fluorescent brighteners, triazole fluorescent brighteners, thiazole fluorescent brighteners, and oxazole fluorescent brighteners.

  The content of the fluorescent brightening agent is arbitrary, but it is preferably at least 0.01% by weight in order to obtain a white effect. On the other hand, if there is a large amount of fluorescent whitening agent, self-quenching occurs and the whitening effect is diminished, so a content of 0.07% by weight is sufficient.

  The method for containing the fluorescent brightening agent is not particularly limited. Often used is a method of mixing a master chip to which a fluorescent whitening agent has been added at a high concentration in advance and a normal chip, and spinning them. There is also a method in which a chip and a fluorescent brightening agent are mixed and used for spinning.

In addition, it is optional to add various additives for the purpose of improving fiber properties and functionalization. Examples of such additives include antistatic agents, light-proofing agents, heat-resistant agents, and flame retardants.
Further, ordinary polymers are slightly colored due to the presence of a metal component that is a polymerization catalyst, but a small amount of dye / pigment may be added in order to reduce the coloration caused by such a catalyst.

  The cross-sectional shape of the fiber constituting the false twisted yarn of the present invention is not particularly specified. Generally, round cross-sections and triangular cross-sections are used, but the light reflection on the fiber surface changes by changing the shape, such as a polygon or flattened square or more, thereby improving see-through prevention performance. Is also possible.

  In addition, the false twisted yarn of the present invention may be one in which the thermoplastic resin of the present invention is used alone for the entire fiber cross section (total dispersion), but two or more kinds of resins including the thermoplastic resin of the present invention It is also possible to use a composite fiber in which In addition, the total dispersion and the composite fiber are preferably total dispersion from the viewpoint of see-through prevention and manufacturing cost, from the viewpoint of easily reducing wear of machine parts in each process and from the viewpoint of color development. Is preferably a composite fiber.

  Here, when the composite fiber is used, at least one of the resins may be the thermoplastic resin of the present invention containing the white pigment and carbon black. In this case, a suitable fiber cross-sectional shape is, for example, a shape in which the other A component is divided into two parts by the thermoplastic resin (B component) of the present invention containing a white pigment and carbon black.

  The component A may be the thermoplastic resin of the present invention, or may be a resin that does not contain a white pigment or a black pigment, but the white pigment is contained in excess of the amount contained in a normal chip (for example, 1% by weight or less). Preferably not. Further, it is preferable that the black pigment is not contained or is contained in a smaller amount than the thermoplastic resin of the present invention. Further, as the fiber-forming polymer as the main component of the component A, a polymer similar to the thermoplastic resin of the present invention can be used as appropriate, and polyester can be particularly preferably used.

Moreover, it is preferable that both A components are partially exposed on the fiber surface. That is, it is preferable that the A component is not completely contained by the B component, for example, A-B-A is arranged concentrically.
If the cross-sectional shape of such a fiber is illustrated, an example like FIGS. 1-3 will be given. Among them, the so-called “hamburger type” as shown in FIG. 1 is preferable and has excellent color development. The ratio of both components A and B in such a composite fiber is preferably 1: 1 to 4: 1, more preferably 1: 1 to 3: 1 (the ratio is divided into two divided A components). Calculated by summing minutes).

  In the case of the above composite fiber, it is preferable from the point that the exposure of the pigment to the fiber surface can be suppressed and the spinning operability and the post-processability are good as compared with those composed of the component B alone. In addition, in the case of the composite fiber as described above, it is possible to obtain an effect that the see-through preventing property is good and the color developability is also excellent.

  The false twisted yarn of the present invention may be false twisted POY (semi-drawn yarn) or false twisted drawn yarn.

  The total fineness of the false twisted yarn of the present invention is preferably about 22 to 167 dtex.

The false twisted yarn is from the viewpoint of easily obtained preventing effect sheer, those false twist multifilament is preferred.

  The single yarn fineness of the false twisted yarn is preferably about 0.1 to 2.5 dtex from the viewpoint of easily obtaining an effect of preventing see-through.

  Moreover, it is preferable that the expansion-contraction restoration rate (CR) of JISL1013 8.12 of the said false twisted yarn is 25 to 45%. That is, from the viewpoint of easily obtaining the see-through preventing effect, those having a high expansion / contraction restoration rate are preferable, and 25% or more is preferable. More preferably, it is 30% or more. From the viewpoint of ease of handling, the upper limit is preferably about 45%.

The manufacturing method of the false twisted yarn of this invention is illustrated below.
After the thermoplastic resin is melt-spun to obtain a synthetic fiber, false twisting is performed. The spinning method is not particularly limited, and a known method can be used as appropriate.

In the case of false twisting the drawn yarn, the yarn speed is preferably 50 to 150 m / min, and the temperature of the false twist heater is preferably 150 to 220 ° C. Moreover, as for the twist coefficient shown to a following formula, 24000-34000 is preferable.

  In the case of false twisting of POY, the spindle speed is preferably 100 to 300 m / min, the draw ratio is preferably 1.4 to 1.8 times, and the heater temperature is preferably 140 to 220 ° C. . The twist coefficient is preferably 24,000 to 34000. In the case of high-speed friction false twisting, the yarn speed is preferably 500 to 800 m / min, and D / Y is preferably 1.5 to 2.5. In this case, the heater temperature is preferably 160 to 240 ° C. for the contact type, 250 to 450 ° C. is preferable for the non-contact type, and the draw ratio is preferably 1.4 to 1.8 times.

  The false twisted yarn of the present invention may be used alone as a yarn, or may be used as one component of a mixed fiber.

  Moreover, the yarn containing the false twisted yarn of the present invention may be mixed with other fibers when forming a fabric. Specifically, there are methods such as knitting and weaving.

  The false twisted yarn of the present invention can be used as it is as “white fiber (fabric)” without being dyed, but may be dyed with a small amount of dye to be “light-colored fiber (fabric)”. Of course, even if it is a light color, it can exhibit the prevention of see-through. Moreover, it is also possible to use for normal dyeing | staining.

  The fabric comprising the false twisted yarn of the present invention is suitably used for sports applications such as sportswear and swimwear. Furthermore, the pants (trousers) and the outer garment made of the false twisted yarn of the present invention have an effect that the color pattern of the clothing put underneath is not conspicuous. This can make the color of the garment itself stand out, so that it is excellent in design.

Hereinafter, the present invention will be specifically described with reference to examples.
Example 1
Using regular PET resin (containing 0.03% by weight of titanium oxide), a master chip (M1) having an average particle size of 0.3 μm and a titanium oxide content of 20% by weight was manufactured. M1 and the above-mentioned regular PET resin were mixed as appropriate. This was coated with carbon black and fluorescent whitening agent (HOSTALUX, Clariant Japan Co., Ltd.) to obtain a uniform material for spinning (titanium oxide 6% by weight, carbon black 2 ppm, fluorescent whitening agent 0.05%).
Using the above raw materials, spinning and drawing were performed by a conventional method to obtain 84 dtex / 48f multifilament, and false twisting was performed under the following conditions to obtain false twisted yarn (84 dtex / 48f, CR: 32. 5%).
<False twist processing conditions>
Yarn speed: 85 m / min Number of twists: 3,250 T / M
Heater temperature: 180 ° C
Feed rate: + 2%
Winding rate: + 5%
The obtained false twisted yarn was knitted to obtain a knitted fabric. Under this knitted fabric, a white board with an alphabet printed at 28 points pasted on top was placed, and no alphabet was visible. In the spinning process and false twisting process, troubles such as thread breakage, single thread breakage, and excessive wear of machine parts did not occur, and there were no problems in the subsequent processes.

(Example 2)
A knitted fabric was obtained in the same manner as in Example 1 except that the content of titanium oxide as a spinning raw material was changed to 3% by weight, 8% by weight, and 10% by weight. As in Example 1, when a white board was placed under the knitted fabric, no alphabet was seen in any of them. In the spinning process and false twisting process, troubles such as thread breakage, single thread breakage, and excessive wear of machine parts did not occur, and there was no problem in the subsequent process.

(Example 3)
A knitted fabric was obtained in the same manner as in Example 1 except that the carbon black content of the spinning raw material was changed to 4 ppm, 6 ppm, and 10 ppm. As in Example 1, when a white board was placed under the knitted fabric, no alphabet was seen in any of them. In the spinning process and false twisting process, troubles such as thread breakage, single thread breakage, and excessive wear of machine parts did not occur, and there was no problem in the subsequent process.

Example 4
A knitted fabric was obtained in the same manner as in Example 1 except that the content of the fluorescent brightening agent as the spinning raw material was changed to 0, 0.02% by weight. When a white board was placed under the knitted fabric in the same manner as in Example 1, no alphabet was seen. Further, troubles such as yarn breakage or single yarn breakage did not occur in the spinning process or false twisting process. In addition, the thing of 0.02 weight% and 0.05 weight% (Example 1) were excellent also in whiteness.

(Comparative Example 1)
A knitted fabric was obtained in the same manner as in Example 1 except that the master chip was only regular PET resin (containing 0.03% by weight of titanium oxide). When the white board was put under the knitted fabric in the same manner as in Example 1, the alphabet was seen through.

(Comparative Example 2)
A knitted fabric was obtained in the same manner as in Example 1 except that the content of titanium oxide as a raw material for spinning was changed to 12% by weight, but the spinning operability and false twisting operability deteriorated.

(Comparative Example 3)
A knitted fabric was obtained in the same manner as in Example 1 except that the carbon black content of the spinning raw material was changed to 12 ppm. There was no problem with spinning operation and false twisting operation. As in Example 1, when a white plate was placed under the knitted fabric, the alphabet was not seen, but the knitted fabric was grayish, and was not suitable for use in white knitted fabrics or for light-colored dyeing.

(Comparative Example 4)
A knitted fabric was obtained in the same manner as in Example 1 except that a spinning material containing no carbon black was used. Although there was no problem in spinning operability and false twist operability, when the white plate was placed under the knitted fabric as in Example 1, the alphabet was seen through.

(Example 5)
Regular PET alone was used as the A component of the composite fiber, and the spinning raw material of Example 1 was used as the B component. These were combined and spun and stretched to obtain 84 dtex / 48f composite fiber. The composite shape was as shown in FIG. 1, and the composite ratio of A: B was 2: 1. Using the resulting conjugate fiber, an 84 dtex / 48f false twisted yarn was obtained in the same manner as in Example 1.
The obtained false twisted yarn was knitted in the same manner as in Example 1 to obtain a knitted fabric. As a result of evaluating the see-through preventing property, although Example 1 was superior, it was a good see-through preventing property. In the spinning process and false twisting process, troubles such as thread breakage, single thread breakage, and excessive wear of machine parts did not occur. When dyed with red, blue and yellow dyes, all colors were vividly dyed. When the sample of Example 1 was dyed in the same manner, the sample of Example 5 was superior in color developability.

  The false twisted yarn obtained by the present invention can be widely used in the clothing field including sports clothing such as swimwear and tennis wear.

It is an example of the cross-sectional view of the composite fiber which comprises the false twisted yarn of this invention. It is an example of the cross-sectional view of the composite fiber which comprises the false twisted yarn of this invention. It is an example of the cross-sectional view of the composite fiber which comprises the false twisted yarn of this invention.

Explanation of symbols

A A ₁ A ₂ A component B B component (thermoplastic resin of the present invention)

Claims (11)

A false twisted yarn for clothing characterized by false twisting a multifilament using a thermoplastic resin containing 2 to 10% by weight of a white pigment and 2 to 10 ppm of a black pigment, and having an expansion / contraction recovery rate of 25% or more. . The false twisted yarn for clothing according to claim 1, wherein the white pigment is titanium oxide. The false twisted yarn for clothing according to claim 2, wherein the titanium oxide has an average particle size of 0.2 to 1 µm. The false-twisting yarn for clothing according to any one of claims 1 to 3, wherein the black pigment is carbon black. The false twisted yarn for clothing according to any one of claims 1 to 4, comprising 0.01 to 0.07% by weight of a fluorescent brightening agent. The false twisted yarn for clothing according to any one of claims 1 to 5, wherein the thermoplastic resin is used for the entire cross section of the multifilament fiber. Two or more resins A false twisted yarn of composite fibers composite, in any one of claims 1 to 5, wherein the at least one resin of the composite fibers are the thermoplastic resin The false twisted yarn for clothing as described. The false twisted yarn for clothing according to claim 7, wherein the fiber cross section of the composite fiber has a shape in which the other component is divided into two by the component containing the thermoplastic resin. 8. A false twisted yarn for clothing according to claim 7, wherein the component including the thermoplastic resin is partially exposed on the fiber surface and the fiber cross section of the composite fiber is not completely contained by other components. . Clothing textured yarn as claimed in any one claims 1-9 wherein the thermoplastic resin is a polyester. The clothing using the fabric which consists of false twisted yarn as described in any one of Claims 1-10.

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