JP2007262620A - Spinneret for modified cross section fiber, and modified cross section fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a modified cross section fiber capable of satisfying both good temperature-keeping effect, post treatment-maintaining effect, and sweat-absorbing and evaporating effect though having a relatively simple structure, and a spinneret for producing the modified cross-section fiber. <P>SOLUTION: This modified cross section fiber 2 is formed to have a form of arranging two C-type pattern parts 201, 202 as overlapping. Thereby, around a hollow body part 212, two pairs of projections 201a, 201b (202a, 202b) are extended from a circular side surface, and by forming them continuously along the longitudinal direction of the modified cross section fiber 2, a belt-shaped slits 221 and 222 are arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

 The present invention relates to a technique of a spinneret for deformed section yarn and a deformed section thread, and more particularly to a technique for achieving both a heat retaining effect, a sustained post-treatment sustaining effect, and a drying property.

Conventionally, typical properties required for clothing fibers include heat retention, persistence of post-treatment sustaining effect, sweat absorption / dissipation effect, and good hand feeling. Therefore, a yarn having a non-circular cross-sectional shape (a so-called irregular cross-sectional yarn) has been developed for a fiber having a general round cross-sectional shape.
For example, as shown in Patent Document 1, the modified cross-sectional yarn is a yarn configured to have a cross-sectional shape such as a cross-girder shape, as shown in Patent Document 4, in addition to an ellipse, a star, a cross, and the like. . By using such a yarn alone or blended with other types of yarn, it is possible to adjust the feel of elasticity, stiffness, and the like as compared with a yarn having a round cross-sectional shape. Moreover, even if it is a synthetic fiber, a texture can be brought close to a natural silk fiber.

Further, since the surface area is larger than that of a fiber having a round cross-sectional shape, it can be dyed abundantly and color development can be improved.
On the other hand, as shown in Patent Document 4, if a modified cross-section yarn having a cross-sectional shape is used, a staying air layer (so-called dead air portion) is secured in the hollow portion, so that a good heat retaining effect is exhibited. The In addition, the presence of the hollow portion can secure the bulk density with respect to the weight, and there is an advantage that an effect such as a heat retaining effect and a heat insulating property can be obtained while being lightweight.
JP-A-2005-290630 JP-A-8-260227 JP 63-196710 A JP 2000-199122 A Japanese Patent Laid-Open No. 5-27911

However, the conventional modified cross-section yarn has a problem that it is difficult to satisfy all of the heat retaining effect, the post-treatment sustaining effect, and the sweat absorption / release effect.
For example, in the case of a well-shaped cross-sectional yarn, the heat retention effect is good, but there remains a problem regarding the post-treatment sustaining effect such that a drug or the like attached to the yarn is likely to fall off with time.
Further, in a yarn containing abundant hollow portions, a certain time is required until the once absorbed sweat is dissipated, and it can be said that there remains a problem to be solved in terms of comfort.

  Therefore, the present invention provides a modified cross-section yarn that has both a relatively simple structure and can achieve both a good heat retention effect, a post-treatment sustaining effect, and sweat absorption / release, and a modified cross-section yarn cap for producing the same. Is to provide.

In order to solve the above problems, in the present invention, in the cross-sectional shape, two ring bodies are arranged in a state in which a part of each internal space is overlapped, and each ring body has a region other than the overlapped portion. A modified cross-section yarn having a notch part in part and having a configuration in which the internal space of the ring body excluding the inside of the overlapped part is externally released by the notch part.
Note that, in the cross-sectional shape, the cutout portion in the ring body may be provided at a position of the ring body that is point-symmetric with respect to the center in the overlapping portion.

Further, in the cross-sectional shape, the two tip portions facing the notch portion of the ring body may be configured to face each other across a gap whose angle from the center of the ring body is 40 ° or more and 140 ° or less. it can.
Furthermore, it can also be set as the structure by which ceramics are disperse | distributed with respect to the main raw material.
The present invention also relates to a modified cross-section yarn cap in which a nozzle slit having a predetermined shape is perforated in a base material, wherein the nozzle slit includes two ring-shaped slits in a state where a part of each slit is overlapped. Each ring-shaped slit, which is arranged on the material, is a deformed cross-section yarn base having a configuration in which a part of the region other than the overlapping portion is cut away.

Here, the notch portion in the ring-shaped slit can be configured to be provided at the position of the ring-shaped slit that is point-symmetric with respect to the center of the overlapping portion.
Further, in each ring-shaped slit, the two tip portions of the ring-shaped slit facing the notch are opposed to each other across a gap whose angle from the center of the ring-shaped slit is 40 ° or more and 140 ° or less. It can also be.

According to the modified cross-section yarn of the present embodiment having the above configuration, as a first effect, an abundant gap is formed between the hollow portion and the protrusion pair, and the gap becomes a so-called dead air portion. As a result, in the apparel using the fibers, the porosity with respect to the apparent bulk density is increased, and a good heat retaining effect is exhibited using the air layer staying in the dead air portion as a heat medium.
Further, in the present invention, since the protrusion pair is arranged so as to surround the space at a certain distance, the holding force of the air layer is higher than that of the conventional cross-girder modified cross-section yarn having a simple protrusion. It is high. For this reason, the retention effect of an air layer is high compared with the past, and the heat retention effect over a long period can be expected.

  Furthermore, in the present invention, since the protrusion pair is curved, the fiber surface located on the inner surface of the protrusion pair is less likely to come into contact with other fibers or the like outside. For this reason, for example, even if post-treatment processing such as applying a predetermined drug after the fiber is created, the problem that the drug applied to the inner surface of the protrusion rubs against other fibers and falls off effectively is effectively prevented. Is done. For this reason, the chemical | medical agent attached at the time of post-processing can be maintained for a long period of time, and the effect by the said chemical | medical agent can be maintained over a long period of time.

On the other hand, the projection pair is not completely closed, and the circulation with the outside air is ensured. Therefore, as a second effect, even when the fiber absorbs sweat, the sweat is released after a certain time, so that it is possible to constitute a garment with good touch that suppresses stickiness.
As described above, according to the modified cross-sectional yarn of the present invention, it is possible to achieve both the heat retention effect and the post-treatment drug retention effect.

Embodiments and examples of the present invention will be described below, but the present invention is naturally not limited to these forms, and may be appropriately modified and implemented without departing from the technical scope of the present invention. Can do.
(Embodiment 1)
<Configuration of spinning device>
FIG. 1 is a diagram showing a configuration of a spinning device according to Embodiment 1 of the present invention. In the present apparatus, the main characteristic part of the present invention is the structure of the base, and the rest is the same as the conventional structure.

The spinning device 1 is a melt spinning device that employs a so-called melt spinning method.From the upstream side, a tip tank 10, a device body 20, a deformed cross-section yarn base 100, a cooling air blowing cell 30, a cooling cylinder 40, and Oiling rollers R1, R2, godet rollers R3, R4, unstretched spool SP, etc.
The chip tank 1 is for charging a resin chip as a yarn material, storing a certain amount thereof, and supplying the material to the downstream side as appropriate.

  As the resin chip to be put into the chip tank 1, for example, various synthetic fiber materials made into pellets are used. Suitable synthetic fibers include, for example, polyesters such as polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polyamides such as nylon 6 and nylon 66, polyacryl, polypropylene, polyvinyl chloride, and polyvinyl alcohol. Any of these materials can be used alone or in admixture of two or more.

The apparatus body 20 has a configuration in which an extruder 21, a polymer solution flow path 24, a metering pump 22, and a space 23 are connected in this order.
The extruder 21 is for transporting the resin chip supplied from the chip tank 10 between the internal passage and the screw, and while rotating and transporting the screw, the resin chip is heated and melted to polymer solution. And introduced into the metering pump 22 through the polymer solution flow path 24. The flow path P1 is a preliminary passage. In FIG. 1, the extruder 21 shows an exterior in a sectional view.

The metering pump 22 is constituted by a precision gear pump, and discharges the polymer solution into the space portion 23 by a predetermined amount and conveys the polymer solution to the deformed cross-section yarn cap 100. Then, the polymer solution is discharged from the deformed cross-section yarn cap 100 at a predetermined pressure.
The cooling air blowing cell 30 plays a role of blowing air from the side surface of the yarn material L discharged from the deformed cross-section yarn cap 100 through the flow path V1. In this figure, the yarn material L is shown as one, but in actuality, there are a number of yarn materials corresponding to the number of nozzle slits 150 described later.

The cooling cylinder 40 is a cylinder having a fixed length, and cools the yarn material conveyed from the cooling air blowing cell 30 by further blowing air through the flow paths V2, V3. is there.
Oiling rollers (oil application rollers) R1, R2, godet rollers (winding speed adjusting rollers) R3, R4, and unstretched spool SP take up yarn at high speed while suppressing the occurrence of friction based on a predetermined take-up speed It is the structure for.

The general operation of the spinning apparatus 1 having the above configuration is as follows.
At the start of driving, the operator first puts a predetermined resin chip into the chip tank 1.
Then, the resin chip is heated and melted in the extruder 21 while being conveyed by the rotation of a screw incorporated therein.
The melted material is discharged from the die while the flow rate is accurately measured by a gear pump built in the extruder 21. The discharged yarn material L is wound around the unstretched spool SP via the rollers R1 to R4 disposed on the downstream side. The wound unstretched yarn material L is then processed in a predetermined stretching process. Thereby, the modified cross-section yarn 2 of the present invention is completed.

<Configuration of irregularly shaped cross-section thread cap 100>
FIG. 2 is a top view showing a configuration of a modified cross-section yarn base 100 attached to the spinning device 1. FIG. FIG. 3A is a cross-sectional view of the die along line xx ″ in FIG. 3B, and FIG. 3B is a front view of the nozzle plate 140.
The modified cross-section thread die 100 is attached to the downstream side of the space portion 23, and the polymer solution supplied from the space portion 23 is introduced into the perforated portion 130 and discharged from the nozzle slit 150. The predetermined modified cross-section yarn 2 is spun.

The modified cross-section threaded die 100 is made of an alloy material (for example, SUS630 material that is precipitation hardened stainless steel) that is excellent in toughness, corrosion resistance, and high hardness, and is formed by machining or electric discharge machining. ing.
The modified cross-section yarn base 100 has a disc-shaped base body 101 having a certain thickness as shown in FIGS. 2 and 3 (a). Is formed with an opening 103 including a small diameter portion 1031 and a large diameter portion 1032 that function to attach to the apparatus main body portion 20. On the other hand, a groove portion 102 having a constant width is formed on the main surface of the irregularly shaped cross-section yarn cap 100 along the vicinity of the outer edge thereof.

A total of 50 circular perforated portions 130 are formed in the groove portion 102 at regular intervals through the base body portion 101, and a predetermined nozzle slit (hole) 150 is formed in each perforated portion 130. A nozzle plate 140 is disposed.
Here, the present invention is characterized by the shape of the nozzle slit 150.
That is, the nozzle slit 150 provided in the nozzle plate 140 is generally symmetrical with the C-shaped slit portions 151 and 152 formed by cutting out part of two ring-shaped slits as shown in FIG. 3 (b). Have overlapping patterning shapes. Specifically, an annular slit body 153 is formed in the vicinity of the center of each of the two C-shaped slit portions 151 and 152. Yes. Further, in each arc portion of the C-shaped slit portions 151 and 152 other than the slit main body portion 153, protrusions are formed at symmetrical positions with the main body portion 153 as a point center on both left and right sides across the slit main body portion 153. A pair of slits 151a and 151b (152a and 152b) are formed.

  Each protruding slit pair 151a, 151b (152a, 152b) has a notch in the gap between the leading ends 1510a, 1510b (1520a, 1520b) of the protruding slits 151a and 151b (152a and 152b) forming each pair. In a state of being opposed to each other with a certain gap 171 (172), they are symmetrically curved so as to converge at the gap 171 (172). As a result, a space region 161 (163) is secured between the protruding slits 151a and 151b (152a and 152b).

Note that due to the patterning restriction of the nozzle slit 150 (to hold the nozzle plate 140 integrally), the nozzle plate 140 has gaps 153 and 154 that divide a part of the slit regions 151c and 152c forming the slit body portion 153. Although present, the modified cross-section yarn 2 formed by the modified cross-section yarn cap 100 is not divided by the gaps 153 and 154, and a series of hollow main body portions 212 are formed.
Of course, materials other than the above stainless steel can be used as the material for the irregularly shaped cross-section thread die 100.

Furthermore, it goes without saying that the number of circular perforated portions 130 provided in the modified cross-section yarn base 100 can be appropriately changed according to the scale of spinning and the like.
<Configuration and effect of modified cross-section thread 2>
FIG. 4 is a perspective view showing the configuration of the modified cross-section yarn 2 of the present invention. 4A is a perspective view, and FIG. 4B is a front sectional view.

  The deformed cross-section yarn 2 shown in FIG. 4 (a) is formed by a yarn material L obtained by extruding a polymer solution from the deformed cross-section yarn base 100 after a predetermined post-treatment such as a drawing treatment. The C-shaped pattern parts 201 and 202 formed by cutting out part of the two ring bodies are arranged in a superimposed manner so that the internal spaces of each other are overlapped, and are almost the same as the nozzle pattern 150. Has a cross-sectional shape. As a result, two pairs of protrusions 201a and 201b (202a and 202b) are extended from the arcuate side surface around the hollow main body 212, and this has a constant gap at each of the tip portions 2010a and 2010b (2020a and 2020b). In this way, the band-shaped slits 221 and 222 are provided.

  According to the modified cross-section yarn 2 of the first embodiment having the above configuration, when this is knitted and used as a clothing material, as a first effect, the hollow body portion 212 is retained in a heat-insulated state. An air layer is secured. For this reason, compared with the solid fiber etc. which have a circular section using this as a heat carrier, a favorable heat retention effect is ensured. Further, in addition to this, a heat retaining effect is ensured also in the dead air portions 211 and 213 surrounded by the protrusion pairs 201a and 201b (202a and 202b). In addition, since the hollow body portion 212 has a high porosity (bulk density), it can be made relatively lightweight, and has an optimum configuration as a fiber for clothing.

  As a second effect, the protrusion pair 201a, 201b (202a, 202b) is disposed so as to surround the dead air portions 211, 213, and external contact is not caused on the fiber surface facing the dead air portions 211, 213. Because it is almost cut off, chemicals applied to the fiber surface during post-processing (for example, antistatic processing agents, antibacterial / antibacterial processing agents, deodorizing / deodorizing processing agents, far-infrared processing agents, etc. Drugs known for post-processing) are less likely to fall off due to external contact. For this reason, according to the modified cross-section yarn 2 of the present invention, compared to the cross-shaped cross-section yarn in the prior art, the drug adhered by the post-treatment can be maintained for a long time, and the effect of the drug can be maintained for a long time.

  As a third effect, the presence of the band-shaped slits 221 and 222 between the protrusion pairs 201a and 201b (202a and 202b) allows sweat adhering to the deformed cross-section yarn 2 to pass through the band-shaped slits 221 and 222 to To be absorbed. Then, the absorbed sweat is dissipated into the outside air through the strip slits 221 and 222 released to the outside without being sprinkled as it is over time. Because of this action, according to the present invention, it is possible to constitute a garment that is excellent in dry touch and that is excellent in dry touch, and exhibits both the sweat-absorbing and diffusing effects.

The hollow body 212 may be formed to be more elliptical along the direction passing through the two intersections of the two C-shaped patterns 201 and 202. However, it has been found that it is desirable that both of the C-shaped patterns 201 and 202 have a shape matched to a perfect circle, considering the difficulty of crushing the yarn.
(About the angle of the protrusion pair)
The pair of protrusions 201a and 201b (202a and 202b) in the modified cross-section yarn 2 of the present invention needs to be adjusted to an angle capable of holding the air layer in order to secure the dead air portions 211 and 213. The considerations in this regard will be described.

  As shown in FIG. 4B, in each protrusion pair 201a, 201b (202a, 202b), the angle θ (θ ′) between the tip portions 2010a, 2010b (2020a, 2020b) facing the strip slits 221 and 222 In the case where the C-shaped pattern portion 201 (202) is a virtual ring body, it is set to 40 ° or more and 140 ° or less from the center O (O ′). This is because if the angle is 40 ° or less, the internal air layer is almost cut off from the outside air and does not circulate, so that after sweating, the effect of divergence cannot be obtained. On the other hand, if the angle is 140 ° or more, it is considered that the internal air layer is excessively released from the outside air and the necessary heat retaining effect cannot be maintained. In order to obtain this effect even better, it is more preferable that the angle is 60 ° or more and 120 ° or less.

It should be noted that this angle adjustment needs to be performed in the same way to adjust the angle between the tip portions 1510a and 1510b (1520a and 1520b) facing the gaps 171 and 172 in the base 100.
Furthermore, the degree of superimposition of the C-shaped pattern portion 201 (202) constituting the modified cross-section yarn 2 of the present invention can be changed as appropriate, but out of the total area in the cross-section, all projection pairs 201a, 201b (202a, 202b ) The area occupied by the area is preferably 1/2 or more and 1/3 or less. This is mainly to adjust the size of the protrusion pair 201a, 201b (202a, 202b) with respect to the hollow main body 212 to achieve both a heat retaining effect, a post-processing sustaining effect, and a sweat absorption / dissipating effect.

<About irregular cross-section yarn containing ceramic material>
In Embodiment 1 described above, a configuration using a general synthetic fiber material has been described. However, in the present invention, a modified cross-section yarn with ceramics made of a material added with ceramics can also be used.
As the ceramic material, ceramics made of various materials such as carbides such as ZrC and TiC, CaO, Al ₂ O ₃ , SiO ₂ , MgO, Ni ₂ O ₃ , TiO ₂ , and Fe ₂ O ₃ can be used.

According to the deformed cross-sectional yarn with ceramics having such a configuration, in addition to the effect of the shape described in the first embodiment, a good heat retention effect is exhibited by the far infrared rays of the ceramic component, which is preferable. At this time, composite radiation by the infrared radiation of the ceramic component itself and the radiation of the fiber itself can be expected, and a significant heat retention effect is expected compared to the conventional case.
In addition, the ceramic component is kneaded with a synthetic fiber material and mixed, whereby the ceramic component does not easily fall off even when washing is performed, and good washing resistance can be imparted. Such performance is a great merit in secondary processing of the manufactured fiber.

As a specific manufacturing method, a commercially available ceramic powder material is used, or natural ore such as nepheline is pulverized to obtain ceramic particles having an average particle size of about 1.0 μm. It is desirable to use a particle size as small as possible because the surface area of the particles can be increased at the same weight ratio and the far infrared effect can be enhanced.
The prepared ceramic particles are preliminarily mixed, for example, with stirring with the resin chip in advance. Then, this is supplied to a twin screw extruder and melt kneaded and pelletized. The pellets in which the ceramic particles and the resin are compounded are put into the chip tank as the resin chip and melt extruded by the extruder 21. Thereafter, the modified ceramics are formed based on the same method as in the first embodiment. A cross-sectional yarn can be produced.

  Here, a known mixing device can be used without limitation as a mixing device used for the composite of ceramic particles and resin. Preferably, a mixer and an extrusion molding machine using a plurality of screws and rolls, a single screw extrusion molding machine, An injection molding machine etc. can be illustrated. The ceramic content can be changed as appropriate depending on the ratio between the resin chip and the ceramic particles. However, if the amount of ceramic particles is too small, it becomes difficult to obtain the far-infrared effect, and if the amount of ceramic particles is excessive, Care must be taken because the strength of the irregular cross-section yarn is reduced. The amount of ceramic particles added to maintain the yarn strength may be appropriately determined while confirming the yarn strength. For example, it is preferably 20% or less, and more preferably 10% or less.

The far-infrared effect of fibers containing ceramics is described in detail, for example, in “Usage of Far-Infrared Ceramics at Normal Temperature” Material Technology Vol.11, No.4,1993.
<Comparative experiment using Examples>
Hereinafter, the results of actually producing the modified cross-section yarns of the present invention as Examples 1 to 5 and conducting performance comparison experiments with Comparative Examples 1 to 4 will be described.

  The general cross-sectional shapes of Examples 1 to 5 and Comparative Examples 1 to 4 were as shown in Table 1 below. Here, as shown in FIG. 5 (b), the hollow circular cross-girder cross-sectional shape in Comparative Example 2 is symmetrically released outward from the center of the ellipse near both ends in the major axis direction of the oval main body. Further, a yarn having a cross-sectional shape in which a C-shaped pattern portion is arranged, for example, a shape described in FIG. 3 (b) of JP-A-10-110324 as a conventional technique.

(Experimental conditions)
For the yarns of Examples 1 to 5 and Comparative Examples 1 to 3, nylon 6 (UBESTA 1011F) manufactured by Ube Industries is barrel temperature 220 to 245 ° C. and nozzle temperature 250 ° C. in a φ32 mm single screw extruder (L / D = 25). And melt spun.
Examples 1 to 5 were spun using a substantially slit-shaped shape and a die having 16 nozzle holes illustrated in FIG. 3B.

For Example 2, premixed agglomerated natural ore (including ceramic components such as SiO ₂ , Al ₂ O ₃ and CaO as main components) and Ube Industries nylon 6 powder (UBESTA P1011F) with stirring. The powder raw material thus obtained was melt-spun using a single-screw extruder using resin chips obtained by passing through a twin-screw extruder set at 220 ° C. to 240 ° C. and pelletizing.
During melt spinning, adjust the extruder screw speed and gear pump speed so that the discharge rate is about 0.6 kg / hr. It wound up at 700 m / min. The wound yarn was drawn and wound with a drawing roller heated to 80 ° C. to 150 ° C. while adjusting the speed so that the final fineness was 66 dtex, and a multifilament having 16 filaments was obtained.

Examples 1-5 and Comparative Example 1 were prepared by making the resulting multifilament into a fabric with a milled knitted structure, removing the oil and fat adhering to the fabric by alkali treatment, and then performing post-processing with an antistatic processing agent. ~ 4 doughs were obtained.
<Heat retention evaluation test>
Constant temperature and humidity chamber; 20 ° C x 65% RH
Samples of Examples 1 to 5 and Comparative Examples 1 to 4; 20 × 20 cm were fixed to the embroidery frame.

Hot plate: 19.5 × 19.5 cm, temperature was constant at 32 ° C.
As an experimental method, the dough temperature was stabilized by placing it on a heating plate with a thermocouple attached to the lower surface of the dough. Thereafter, the embroidery frame on which the sample was fixed was moved to a room temperature (20 ° C.) table. Place the fabric sample at a height of about 1 cm above the table surface, and the fabric surface temperature during heat dissipation every predetermined time (immediately after movement, 5, 15, 30, 60, 90, 120, 150, 180 seconds) Changes were measured. Thereby, the temperature change ΔT based on the stabilized dough temperature was examined.

<Clothing sensory evaluation test>
Post-processing with the above antistatic processing agent is performed to fabricate the men's underwear by sewing the fabrics of Examples 1 to 5 and Comparative Examples 1 to 4, and N = 5 for “warmth” and “stickiness” The sensory evaluation of clothing was performed.
<Washing durability evaluation test>
Furthermore, washing and drying was repeated up to 50 times using a commercially available washing machine and a synthetic detergent, and the effect of antistatic processing after each washing was evaluated by clothing sensory evaluation (feeling of clinging) N = 5.

  The results for each of the above tests are shown in Table 2.

(Consideration of experimental results)
In the heat retention evaluation test, there was no significant difference in temperature change for each of Examples 1 to 5 and Comparative Examples 1 to 4 immediately after the movement, but the difference gradually started from around 5 seconds after the movement, and 180 seconds after the movement. Later, it was confirmed that a temperature change rate of about 1.8 ° C. at the maximum was generated for Comparative Example 4 having a solid round cross-sectional shape. On the other hand, in Comparative Examples 1 to 3 having a hollow body portion in the cross-sectional shape, the temperature change rate was small compared to Comparative Example 4, but it was still confirmed that it did not reach the superiority of the heat retaining effect of Examples 1 to 5 did it.

This is considered to be due to the fact that the yarns in Examples 1 to 5 have a hollow main body portion and a protrusion pair in the cross-sectional shape, thereby securing an abundant dead air portion.
Thus, in Examples 1-5, since the rate of temperature change was small, in the next clothing sensory evaluation test, the results of excellent warmth evaluation were also performed for Examples 1-5. In addition, it was confirmed that Examples 1 to 5 were superior to Comparative Examples 1 to 4 or equivalent or better in stickiness evaluation. As a result, in Examples 1 to 5, the band-shaped slit provided so that the dead air part is released to the outside exerts the action of releasing the sweat once sucked out to the outside air, thereby preventing the remaining sweat from being damaged. It can also be said that it has the effect of reducing pleasure.

  Furthermore, in the durability test for washing clothes, there is a problem with clothing in Comparative Examples 1 to 4 from around 30 times after washing, but in Examples 1 to 5 there is almost no problem even after washing at least 50 times. It was. This is the cross-sectional shape of the yarns of Examples 1 to 5, the antistatic treatment performed between the pair of protrusions facing each other is well maintained over time together with dead air secured between the pair of protrusions, As a result, it is considered that the post-treatment effect was exhibited over a long period of time.

In Examples 4 and 5, the wearability is slightly reduced with the number of washings compared to Examples 1 to 3, but this is because the angle between the pair of protrusions in these examples is too narrow or too wide near the limit. It is thought to mean having a value. Thereby, it can be said that the angle between the pair of protrusions having a cross-sectional shape in the irregular cross-section yarn of the present invention is desirably 40 ° or more and 140 ° or less.
From the above tests, the superiority of the present invention was confirmed.

<Other matters>
The spinning method of the present invention is not limited to the melt spinning method described above, and other spinning methods may be used. The melt spinning method is suitable for a material whose melting point is lower than the thermal decomposition temperature and whose molecular weight is not so large and exhibits sufficient fluidity when heated. However, for materials that do not have such characteristics, for example, any of a wet spinning method, a dry spinning method, and a wet and wet spinning method can be applied. In this case, the base of the present invention can be used in any of a coagulating bath, a heated gas, and the like by connecting it downstream of a polymer material chip tank or a metering pump.

  A wide range of applications can be expected as a knitted fabric using the modified cross-section yarn of the present invention. For example, it may be flat knitting (Tenji knitting, single jersey), circular knitted fabric such as rubber knitting (milling knitting, rib knitting), pearl knitting and other flat knitted fabric, Denby knitting, Atlas knitting, cord knitting, For example, a warp knitted fabric such as combed knitted fabric or a woven fabric may be used.

  INDUSTRIAL APPLICABILITY The present invention can be used, for example, as clothing that requires heat retention, such as a cold protection device. Moreover, since it is excellent in post-processing property, it can be used as, for example, a cloth for a print shirt or a coat with a reflective mark for a traffic safety sign. As a form of clothing, it is possible to use it for any of trousers, gloves, socks, etc. in addition to outerwear and underwear.

FIG. 2 is a diagram illustrating a configuration example of a spinning device according to the first embodiment of the present invention. It is a figure which shows the structural example of the nozzle | cap | die for producing an irregular cross-section thread | yarn. It is a figure which shows the structural example of the nozzle | cap | die for producing an irregular cross-section thread | yarn. FIG. 3 is a diagram showing a configuration example of a modified cross-section yarn in Embodiment 1 of the present invention. It is a figure which shows the structural example of the irregular cross-section thread | yarn of a comparative example.

Explanation of symbols

R1, R2 Oiling roller
R3, R4 Godet roller
SP unstretched spool
1 Spinning equipment
2 Profile cross section thread
10 Chip tank
20 Main unit
21 Extruder
22 Metering pump
23 Space Department
24 channels
30 Cooling air blowing cell
40 Cooling cylinder
100 Deformed cross-section thread cap
130 drilling
140 Nozzle plate
150 nozzle slit
151, 152 C-type slit
151a, 151b, 152a, 152b Protruding slit
171 and 172 gaps
201, 202 C type pattern
201a, 201b, 202a, 202b Protrusion pair
211 Dead air
212 Hollow body
211, 222 Strip slit
1510a, 1510b, 1520a, 1520b, 2010a, 2010b, 2020a, 2020b Tip

Claims (7)

In cross-sectional shape,
Two ring bodies are arranged with a part of each internal space overlapped,
Each ring body has a notch in a part of the region other than the overlapping portion,
The deformed cross-section yarn characterized in that the internal space of the ring body excluding the inside of the overlapping portion is released to the outside by the notch portion. In cross-sectional shape,
2. The deformed cross-sectional yarn according to claim 1, wherein the notch portion in the ring body is provided at a position of the ring body that is point-symmetric with respect to the center of the overlapping portion. In cross-sectional shape,
Two tip portions facing the notch portion of the ring body,
3. The deformed cross-sectional yarn according to claim 1, wherein the yarns are opposed to each other with a gap having an angle from the center of the ring body of 40 ° or more and 140 ° or less. 4. The deformed cross-sectional yarn according to claim 1, wherein ceramics are dispersed with respect to the main raw material. A base for a modified cross-section yarn in which a nozzle slit of a predetermined shape is perforated on a base material,
The nozzle slit is
Two ring-shaped slits are arranged on the substrate in a state where a part of each slit is overlapped, and each ring-shaped slit has a configuration in which a part of the region other than the overlapped part is cut out. A cap for irregular cross-section yarns characterized by 6. The deformed cross-section yarn according to claim 5, wherein the notch portion in the ring-shaped slit is provided at a position of the ring-shaped slit that is point-symmetric with respect to the center of the overlapping portion. In each ring-shaped slit, the two tip portions of the ring-shaped slit facing the notch are:
7. The deformed cross-section yarn according to claim 5, wherein the yarns are opposed to each other with a gap of 40 ° or more and 140 ° or less from the center of the ring-shaped slit.

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