JPH09250051A - Pile fabric - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a cut pile fabric using a synthetic fiber which has both a supple texture and a low toughness, has good spinnability, and has a very low loss of a functional agent. SOLUTION: A pile cloth including cut branch piles having a four-branched cross-section fiber satisfying the following (i) to (iv). (i) The tip and center of each branch have a bulge shape through the constriction. the diameter of the inscribed circle of the bulge (ii) branches and r _O, when the minimum width of the constricted portion was set to l _min, constriction degree represented by r _O / l _min is at 1.5 to 3.5 is there. (iii) The constricted portion is cracked from the tip of the cut pile over a length of 0.1 mm or more and 1/3 or less of the pile length. (iv) An anti-mitite agent adheres to at least the neck portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut pile fabric using a synthetic fiber which has both a supple texture and a toughness, has a good spinnability, and has a very low loss of a functional chemical.

[0002]

2. Description of the Related Art Conventionally, as synthetic fibers used for pile yarns of cut pile fabric, flexibility, waist strength,
It is known that a plurality of types of fibers having different denier and different cross-sections are mixed in order to give a supple texture. Further, Japanese Patent Application Laid-Open No. 4-136208 proposes a technique for improving texture, flexibility and the like by using a special flat cross section yarn. Further, in JP-A-7-34315, JP-A-7-173709, etc., the cross-sectional shape of the fiber with emphasis on resilience and waist strength is Y-type, H-type, T-type.
Molds and other synthetic fibers are disclosed. On the other hand, regarding the application of the functional agent, a method of applying the agent during spinning in consideration of a dropout in a later step, or a method of applying a binder agent such as an acrylate resin or urethane resin to prevent the agent from falling off is used. There is.

[0003]

However, a mixture of a plurality of fibers of different denier and different cross sections does not always have a supple texture and a high tenacity, and the spinnability and yarn quality tend to deteriorate. belongs to. In addition, although the special flat cross-section yarn has a supple texture, it is unsatisfactory in terms of bulkiness, poor stiffness, poor spinnability, and resilience under pressure, which is important for cut pile properties, and stiffness. there were. Furthermore, the cut pile fabric using synthetic fibers having a Y-shaped, H-shaped, T-shaped, etc., cross-sectional shape with emphasis on resilience and waist strength has a disadvantage that it has a rough and rigid texture. Was there.

Further, with respect to the loss of functional drugs,
Although a method of making yarn by adding the dropout was taken, cost increase is inevitable with this method, and in the method of using a resin binder, the binder agent is hardened and the texture becomes rough and rigid. Therefore, it is not preferable.

Therefore, an object of the present invention is to provide a cut pile fabric using a synthetic fiber which has both a supple texture and a toughness, has a good spinnability, and has a very small loss of the functional chemicals. .

[0006]

That is, the present invention relates to a pile fabric characterized in that at least a part of the pile yarn contains fibers satisfying the following (i) to (v) as cut piles. is there. (i) It has a multi-branched cross section with 4 to 6 branches extending from the center of the fiber cross section. (ii) The tip and center of each branch have a bulge shape through the constriction. the diameter of the inscribed circle of the bulge (iii) branches and r _O, when the minimum width of the constricted portion was set to l _min, constriction degree represented by r _O / l _min is at 1.5 to 3.5 is there. (iv) The constricted portion is 0.1 mm or more from the tip of the cut pile,
At least 1 over 1/3 of the pile length
It is cracked more than one place. (v) A functional drug adheres to at least the neck.

In the pile fabric, it is preferable that the bulge has a substantially circular shape, and the diameter of the inscribed circle of the bulge of the branch portion is r _O and the diameter of the inscribed circle of the bulge in the center portion is r _C. However, it is desirable that r _C / r _O = 1 to 2 be satisfied.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Fibers having 4 to 6 branch portions used in the present invention (hereinafter, abbreviated as 4 to 6 branched cross-section fibers).
Is, for example, FIG. 1 (1) - has a cross-sectional shape as seen in (3), the diameter of the inscribed circle at the bulge of 4-6 branches shaped tip r _O, the minimum width of the constricted portion l when _min, and it must be special cross-sectional shape of synthetic fibers is r _O / l _min = 1.5~3.5. Preferably r _O / l _min
= 2.0 to 3.0, but if it is less than 1.5, splitting is less likely to occur in the post-process, and if it exceeds 3.5, splitting during spinning, nep occurs during spinning, and cutting. Even with a pile fabric, the splitting portion from the tip of the fiber becomes long, which is insufficient in terms of restoring property and waist strength.

In addition, in the case of a multi-branch type having seven or more branches, whether bulges at the tips of the branch portions are fused with each other to form cross-section fibers,
Or the problem of splitting occurs during raw cotton production. In the case of a three-branch shape or less, the chemicals in the constricted portion are largely dropped off, and since it approaches flatness, spinning failure, bulkiness, and insufficient waist are not preferable.

Further, in order to prevent splitting during spinning and nep during spinning, it is more preferable that r _C / r _O is 1 or more, and further, a supple texture is achieved and split branches are obtained. In order to thicken the bulge of the part to some extent and improve the durability as a cut pile fabric, r _C / r _O is 2
It is more desirable that:

The single fiber fineness of the fiber is not particularly limited, but is preferably about 3 to 30 dr, and more preferably 4 to 12 dr. In order to prevent splitting in the subsequent step and splitting during yarn making, it is preferable that the constriction and the single fiber fineness satisfy the relationship of 0.2 ≦ (constriction / fineness) ≦ 1.0.

In the pile fabric, the constricted portion is finally broken at least at one or more places in the pile cloth over a length of 0.1 mm or more and 1/3 or less of the pile length from the tip of the fiber cut surface. Is important.
The split fibers may occur when the fibers are cut into a predetermined fiber length or when the cut pile is formed, but the split fiber length in this case tends to be 0.1 mm or less. Split fiber part is 0.1mm
If it is less than the above, or if it is not split, a soft texture cannot be obtained when the cut pile is used, and conversely, the split portion is one of the pile length from the tip of the pile to the pile length.
When the length is / 3 or more, it becomes insufficient in terms of resilience and waist strength. Such desired splitting is preferably generated in a normal finishing process such as brushing and polishing after forming the cut pile.

Further, in the fiber used in the present invention, since the functional chemical by post-processing is attached to the constricted portion shown in FIG. 1, the fiber-fiber friction, the fiber-fiber friction, etc. Also, the synthetic fiber is characterized in that the functional drug is unlikely to drop off due to friction between the fiber and the metal.

In the present invention, in order to make the cut pile fabric have both a supple texture and a waist strength, it is 4-6.
It is preferable that the branched cross-section fiber is contained in 30% to 100% of the pile yarn. And, in order to make the texture of the cut pile fabric more flexible, it is preferable that 40% to 80% of the pile yarn is composed of 4 to 6 branched cross-section fibers. The presence of the 4- to 6-branch cross-section fibers in the pile fabric is determined by the manner in which the pile yarns contain the fibers at a predetermined ratio, the pile yarns having a large ratio of the fibers, and the pile yarns having a small ratio or included. It is possible to take a variety of forms, such as pile yarns that are not piled up in the pile fabric and have a desired abundance ratio on average, but in order to maximize the effect of the present invention, cut pile yarns It is desirable that the above-mentioned multi-branched cross-section fibers are present almost uniformly. Therefore, in the pile fabric in which the cut pile and the loop pile coexist,
It suffices to allow the multi-branched cross-section fibers to exist almost evenly in the cut pile portion. In the present invention, the above-mentioned multi-branched cross-section fibers may be optionally used as loop piles instead of cut piles, but only some of the objects of the present invention can be achieved.

The remaining fibers constituting the pile yarn are not particularly limited as long as the effects of the present invention are not impaired, and T type cross section, dog bone type cross section, round cross section fibers and the like are appropriately mixed. Can be used.

The structure and manufacturing method of the cut pile fabric itself are not specified as long as the above requirements for the pile yarn are satisfied. For example, the pile yarn composed of the above-mentioned multi-branched cross-section fiber is used as a base. A technique for manufacturing a tufted carpet to be planted in a cloth or a technique for manufacturing a moquette or the like woven using a pile yarn containing a multi-branched cross-section fiber as a pile warp can be employed.

The fiber thermoforming thermoplastic polymer constituting the multi-branched cross-section fiber of the present invention may be any thermoplastic polymer capable of forming a fiber by melt spinning, such as a polyester polymer, Polyolefin-based polymer,
Polyamide polymer, polyvinyl alcohol polymer,
Examples thereof include polyurethane polymers. Among them, fiber-forming polyester-based polymers and polyolefin-based polymers are preferable, and fiber-forming polyester-based polymers are more preferable.

In the case of using a fiber heat-forming polyester polymer, terephthalic acid or its ester-forming derivative is used as a main dicarboxylic acid component, and ethylene glycol and / or 1,4-butanediol is used as a main diol component. The polyethylene terephthalate-based polymer and / or polybutylene terephthalate-based polymer thus obtained is more preferably used. At that time, the polyethylene terephthalate-based polymer and / or the polybutylene terephthalate-based polymer may contain a small amount (usually 30 mol% or less) of another dicarboxylic acid component, if necessary.
You may have 1 type (s) or 2 or more types of an oxycarboxylic acid component, another diol component, and a polyol component as a copolymerization unit. As the other dicarboxylic acid component in that case,
For example, aromatic dicarboxylic acids such as isophthalic acid, diphenyldicarboxylic acid, and naphthalenedicarboxylic acid, or ester-forming derivatives thereof; metal sulfonates such as dimethyl 5-sodium sulfoisophthalate and bis (2-hydroxyethyl) 5-sodium sulfoisophthalate. Group aromatic carboxylic acid derivatives; aliphatic dicarboxylic acids such as oxalic acid, adipic acid, sebacic acid and dodecanedioic acid, or ester-forming derivatives thereof can be mentioned. In addition, examples of the oxycarboxylic acid component include p-oxybenzoic acid, p-β-oxyethoxybenzoic acid, and their ester-forming derivatives. Examples of other diol components include aliphatic diols such as 1,3-propanediol, 1,6-hexanediol and neopentyl glycol; 1,4-bis (β-
Oxyethoxy) benzene, polyethylene glycol,
Examples include polybutylene glycol. Further, it may be modified with a polyol component such as pentaerythritol.

When a polyolefin polymer is used as the fiber-forming thermoplastic polymer, for example, polyethylene or polypropylene is used, and when a polyamide polymer is used, 6-nylon, 6,6-nylon, 6,10 is used.
-Nylon, 7-nylon, 9-nylon, 11-nylon and the like can be mentioned.

Furthermore, the multi-branched cross-section fibers may consist of one type of fiber-forming thermoplastic polymer or may be a blend of two or more types of fiber-forming thermoplastic polymers. In addition, the fiber-forming thermoplastic polymer is an inorganic fine particle, an aromatic agent, an antibacterial agent, a flame retardant, a deodorant, a pigment, a matting agent, a heat-stabilizing agent, which has been conventionally used in the fiber structure, if necessary. One or two or more kinds of additives such as agents, light stabilizers and antistatic agents may be contained.

Further, since the multi-branched cross-section fiber used in the present invention has a functional agent applied to at least the constricted portion shown in FIG. 1, it is a fiber-fiber in various steps up to the pile fabric. The effect of various treatment agents is improved in the final product because it is hardly affected by friction between fibers or between fiber and metal and the amount of chemicals dropped off is small.
The kind of the functional agent is not particularly limited, but for example, various agents such as a drape property or a feather touch imparting agent such as a silicone resin, an antibacterial agent, an insect repellent, a fungicide, a flame retardant, a deodorant, an aromatic agent, etc. Examples include chemicals. In order to efficiently apply these chemicals to the constricted portion, it is preferable to prepare a chemical treatment liquid and impregnate fibers with the treatment liquid.

The method for producing the multi-branched cross-section fiber used in the present invention is not particularly limited, but one example thereof is polyethylene terephthalate as a fiber-forming thermoplastic polymer and a melting temperature of 270 ° C. 300 ° C, spinning take-up speed 600m / min-1500m / min, temperature 20 ° C-
A cooling air of 30 ° C. is sprayed onto the spun yarn at a speed of 1.0 m / sec to 8.0 m / sec to perform spinning, and at that time or once wound, a stretching treatment is performed to obtain a single fiber fineness of 3 dr to 60.
It is possible to obtain a modified cross-section fiber of dr. For the stretching treatment, known methods known in the art can be adopted. For example, the stretching treatment after spinning is performed by water bath stretching, hot air stretching,
It can be performed by a method such as contact drawing using a heating plate.
The functional chemical can be dried and fixed through a heat treatment step after being applied by dipping in a treatment tank containing the chemical before or after the stretching.

[0023]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. The evaluation test of the tick repellent performance in the examples was carried out by the following method. -Invasion prevention method: A pile cloth sample cut out to a diameter of 4 cm is laid on a plastic petri dish having a diameter of 4 cm and a height of 0.6 cm, and a powder feed containing no ticks in the center thereof.
Put 05g. This petri dish has a diameter of 9 cm and a height of 1.5 cm.
Place in the center of the plastic petri dish. Between the large and small petri dishes, the mite medium is put into a solid of 3000 solids of living mites and spread uniformly. Put this on the adhesive sheet, 27cm
Put the adhesive sheet in a plastic container for food storage of × 13 cm × 9 cm, put saturated saline solution outside the petri dish and cover it to keep the humidity inside the container at about 75%, and incubate at 25 ° C ± 1 ° C. After storing for 1 day and night, the sample is counted by collecting mites by washing with water, and the repellent rate is calculated by applying the following formula. The repellency rate is shown as an average value of 3 times of repetition. Repelling rate (%) = {1- (the number of mites in the treated area / the number of mites in the control area)} × 100 However, the number of mites in the treated area is the number of mites obtained in the test on the mites repellent-treated fabric. And the number of mites in the control section is the number of mites obtained in the test on the cloth of the same structure that has not been subjected to a tick repellent treatment.

Example 1 Using polyethylene terephthalate as the fiber-forming thermoplastic polymer, a four-branch spinning nozzle shown in FIG. 2 (1) (slit width: 0.07 mm, diameter of circular part: 0.25 mm) , The distance between the center of the center circle and the center of the slit tip circle: 0.7 mm), the temperature was 280 ° C., melt spinning was performed at a rate of 1.6 g / min per spinning nozzle, and 24 ° C. at a position 4 to 24 cm directly below the spinneret. Cooling air is blown at a wind speed of 1.3 m / sec and a take-up speed of 1000 m
A winding yarn was produced at a speed of 1 / min. The obtained spun raw yarn is converged and stretched in a water bath at a temperature of 95 ° C. (stretch ratio 2.15) according to a conventional method to impart crimp, and then 1.0% solid content of an insect repellent. Fiber length 131m after drying, cutting
m, single fiber fineness 8.0 dr, constriction degree = 2.97, and atypical cross-section fiber staple having a four-branched surface shape was produced.
50% of the four-branched cross-section fibers, 30% of the triangular cross-section fibers of 6 dr of polyester, and 20% of the round cross-section fibers of 8 dr of polyester were used to produce a pile yarn of W1 / 5 by the semi-wound method, and then 1 / A tuft cut pile having an 8 ″ gauge and a pile length of 8 mm was prepared and subjected to a polisher treatment with a heating roll at 170 ° C. to obtain a polisher carpet. As shown in Table 1, the spinnability was good and the constriction of the four-branched cross-section fiber The part was cracked over a length of about 1 mm from the tip of the pile, and the texture was supple and firm, and a carpet having a repelling rate of 94.3% was also obtained by the invasion prevention method with respect to mites repelling property.

[0025]

[Table 1]

Example 2 Polyethylene terephthalate was used as the fiber-forming thermoplastic polymer and the five-branch spinning nozzle shown in FIG. 2 (2) (slit width: 0.07 mm, diameter of circular part: 0.25 mm) was used. , The distance between the centers of the center circle and the slit tip circle: 0.7 mm), the temperature was 300 ° C., and the melt was spun at a rate of 2.0 g / min per spinning nozzle, and 24 ° C. at a position 4 to 24 cm directly below the spinneret. The cooling air of 1.0m / sec at a wind speed of 800m /
The wound yarn was manufactured in minutes. The obtained spun raw yarn is converged, drawn in a water bath at a temperature of 95 ° C. according to a conventional method (drawing ratio 3.15), crimped, and then an insect repellent is added in a solid content of 1.0%. Fiber length 131m after drying, cutting
m, a single fiber fineness of 8.2 dr, and a degree of constriction = 1.73, a modified cross-section fiber staple having a five-branch cross-sectional shape was produced. 40% of this 5-branched fiber, 6 dr of polyester
A pile yarn was manufactured in the same manner as in Example 1 by using 40% of the triangular cross-section fiber of 20% and 20% of the round cross-section fiber of polyester 8dr to obtain a polisher carpet. As shown in Table 1, the spinnability is good, the tip of the pile is broken,
The texture was supple and firm, and the mite repellency was good.

Example 3 Polyethylene terephthalate was used as the fiber-forming thermoplastic polymer, and a 6-branch spinning nozzle shown in FIG. 2 (3) (slit width: 0.07 mm, diameter of circular portion: 0.25 mm). , The distance between the center of the center circle and the center of the slit tip circle: 0.7 mm), the temperature was 275 ° C., and the melt was spun at a rate of 1.4 g / min per spinning nozzle, and 24 ° C. at a position 4 to 24 cm immediately below the spinneret. The cooling air is blown at a wind speed of 1.3 m / sec and the take-up speed is 1200 m
A winding yarn was produced at a speed of 1 / min. The obtained spun raw yarn is converged, stretched in a water bath at a temperature of 95 ° C. (stretching ratio 2.00) according to a conventional method, and crimped, and then 1.0% of insect repellent solid content is imparted. Fiber length 131m after drying, cutting
m, single fiber fineness 6.0 dr, constriction degree = 3.26, and atypical cross-section fiber staple having a 6-branch cross-sectional shape was produced. 30% of this 6-branched section fiber, 6 dr of polyester
A pile yarn was manufactured in the same manner as in Example 1 by using 40% of the triangular cross-section fiber of 30% and 30% of the round cross-section fiber of polyester 8dr to obtain a polisher carpet. As shown in Table 1, the spinnability is good, the tip of the pile is broken,
The texture was supple and firm, and the mite repellency was good.

Example 4 Polyethylene terephthalate was used as the fiber-forming thermoplastic polymer from the same 4-branch spinning nozzle as in Example 1 at a temperature of 300 ° C., and the discharge rate per spinning nozzle was 1.6 g / min. Melt spinning at a ratio of 4 to 24 cm immediately below the spinneret, and cooling air at 24 ° C. is adjusted to 0.8.
A winding raw yarn was produced by blowing at a wind speed of m / sec and a take-up speed of 1000 m / min. The obtained spun raw yarn was converged, stretched in a water bath at a temperature of 95 ° C. (stretching ratio 3.15%) according to a conventional method, and crimped. 131 mm of fiber length after application, drying and cutting
A modified cross-section fiber staple having a four-branch cross-section with a single fiber fineness of 5.9 dr and a constriction degree of 1.57 was manufactured. A pile yarn was produced in the same manner as in Example 1 by using 80% of the four-branched cross-section fiber and 20% of the round cross-section fiber of polyester 8dr to obtain a polisher carpet. As shown in Table 1, the spinnability is good, the tip of the pile is broken,
The texture was supple and firm, and the mite repellency was good.

Example 5 Polyethylene terephthalate was used as the fiber-forming thermoplastic polymer from the same four-branch spinning nozzle as in Example 1 at a temperature of 275 ° C., and the discharge rate per spinning nozzle was 1.4 g / min. Melt spinning at a ratio of 4 to 24 cm immediately below the spinneret and cooling air at 24 ° C. to 1.3
A wind-up yarn was manufactured by blowing at a wind speed of m / sec and a take-up speed of 1200 m / min. The obtained spun yarn is converged, drawn in a water bath at a temperature of 95 ° C. (draw ratio of 2.00) according to a conventional method, and crimped, and then an insect repellent is added in a solid content of 1.0%. Then, it was dried and cut to produce a modified cross-section fiber staple having a four-branch cross-sectional shape with a fiber length of 131 mm, a single fiber fineness of 6.0 dr, and a constriction degree of 3.26. A pile yarn was produced in the same manner as in Example 1 by using 100% of the four-branched cross-section fiber to obtain a polisher carpet.
As shown in Table 1, the spinnability was good, the tips of the piles were cracked, the texture was supple, the toughness was good, and the mite repellency was also a good value.

<Comparative Example-1> 40% of a fiber (8.4 dr) obtained by adding 1.0% of an insect repellent to a polyethylene terephthalate fiber having a special flat cross section disclosed in JP-A-4-136208 by solid content, A pile yarn was produced in the same manner as in Example 1 using 30% of polyester 6 dr triangular cross-section fibers and 20% of polyester 8 dr round cross-section fibers to obtain a polisher carpet. However, as shown in Table 2, the spinnability was poor. The tip of the pile was not cracked but soft. However, the waist was weak and the mite repellency was lower than that of the example due to the loss of the chemical in the spinning process.

[0031]

[Table 2]

Comparative Example 2 40% of a fiber (8.3 dr) obtained by adding 1.0% of a solid content of an insect repellent to the polyethylene terephthalate fiber having a substantially Y-shaped cross-section disclosed in JP-A-7-34315. A pile yarn was produced in the same manner as in Example 1 using 40% of polyester 6 dr triangular cross-section fibers and 20% of polyester 8 dr round cross-section fibers to obtain a polisher carpet. As shown in Table 2, the spinnability was good, but the pile tips were not cracked and the texture was poor. The mite repellency was lower than that of the example due to the dropout of the chemical in the spinning process.

Comparative Example 3 40% of a fiber (8.3 dr) obtained by adding 1.0% of a solid content of an insect repellent to the polyethylene terephthalate fiber having a substantially H-shaped cross-section disclosed in JP-A-7-173709. A pile yarn was produced in the same manner as in Example 1 using 40% of polyester 6 dr triangular cross-section fibers and 20% of polyester 8 dr round cross-section fibers to obtain a polisher carpet. As shown in Table 2, the spinnability was good, but the pile tips were not cracked and the texture was poor. However, my waist was strong. The mite repellency was lower than that of the example due to the dropout of the chemical in the spinning process.

Comparative Example 4 Using polyethylene terephthalate as the fiber-forming thermoplastic polymer, the temperature was 275 ° C. from the same 4-branch spinning nozzle as in Example 1 and the discharge rate per spinning nozzle was 1.5 g / min. Melt-spun at a ratio of 4 to 24 cm immediately below the spinneret with cooling air at 24 ° C.
A wind-up yarn was manufactured by blowing at a wind speed of m / sec and a take-up speed of 1200 m / min. The obtained spun raw yarn is converged, stretched in a water bath at a temperature of 95 ° C. (stretching ratio 3.86) according to a conventional method, crimped, and then an insect repellent is added,
Drying and cutting, fiber length 131mm, single fiber fineness 3.4d
An irregular cross-section fiber staple having a four-branch cross-section with r and constriction degree = 3.77 was manufactured. The obtained fiber had a constriction degree / fineness = 1.01 and a splitting ratio of raw cotton exceeded 50%, and was mixed with a triangular cross-section fiber of polyester 6dr and a round cross-section fiber of polyester 8dr and spun into the fiber. , Nep occurred frequently and good pile yarn could not be obtained.

Comparative Example 5 Using polyethylene terephthalate as the fiber-forming thermoplastic polymer, the temperature was 300 ° C. from the same four-branch spinning nozzle as in Example 1, and the discharge rate per spinning nozzle was 2.0 g / min. Melt spinning at a rate of 4 to 24 cm immediately below the spinneret and cooling air at 24 ° C. to 0.7
A wind-up yarn was manufactured by blowing at a wind speed of m / sec and a take-up speed of 600 m / min. Converging the obtained spun yarn,
Stretching in a water bath at a temperature of 95 ° C. (stretching ratio 3.45) according to a conventional method, crimping, then applying an insect repellent, drying and cutting to obtain a fiber length of 131 mm, single fiber fineness of 9.6 d.
An irregular cross-section fiber staple having a four-branch cross-section with r and constriction = 1.24 was produced. 40% of the four-branched cross-section fiber, 40% of the triangular-shaped cross-section fiber of polyester 6dr
%, And 20% of a round-section fiber of polyester 8 dr was used to produce a pile yarn in the same manner as in Example-1 to obtain a polisher carpet. As shown in Table 2, the spinnability was good, but the tip of the pile was not cracked and the texture was poor. However, the waist was strong, and a good value for tick repellent was obtained.

[0036]

INDUSTRIAL APPLICABILITY In the present invention, by using a multi-branched cross-section fiber having a specific shape as the fiber constituting the cut pile yarn, the spinnability, the feel and the waist strength are good.
The chemical applied to the constricted portion does not fall off due to friction or the like in each step, even though it is adhered to the fiber surface in the post-processing, so that it can exhibit excellent functionality.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a multi-branched cross-section fiber that constitutes a pile fabric of the present invention.

FIG. 2 is a schematic view showing a spinning nozzle shape for producing the multi-branched cross section used in the present invention.

[Explanation of symbols]

r _O : Diameter of inscribed circle of bulge at tip of branch r _C : Diameter of inscribed circle of bulge at center l _min : Minimum width of neck

Claims (3)

[Claims] 1. The following (i) to at least a part of the pile yarn:
A pile fabric comprising fibers satisfying (v) as cut piles. (i) It has a multi-branched cross section with 4 to 6 branches extending from the center of the fiber cross section. (ii) The tip and center of each branch have a bulge shape through the constriction. the diameter of the inscribed circle of the bulge (iii) branches and r _O, when the minimum width of the constricted portion was set to l _min, constriction degree represented by r _O / l _min is at 1.5 to 3.5 is there. (iv) The constricted portion is 0.1 mm or more from the tip of the cut pile,
At least 1 over 1/3 of the pile length
It is cracked more than one place. (v) A functional drug adheres to at least the neck. 2. The pile fabric according to claim 1, wherein the bulge shape is substantially circular. 3. The diameter r _O of the inscribed circle of the branch bulge and the diameter r _C of the inscribed circle of the central bulge are r _C / r _O =
The pile fabric according to claim 1 or 2, which satisfies 1-2.