JP2000199137A - Spun-toned bulky multifilament and fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject multifilaments and fabrics therefrom, excellent in process stability in the fiber manufacturing and bulk texturing processes, slight in loop loss during high-order processing step, presenting naturally grain- toned appearance when dyed, affording soft and dry touch owing to minute unevennesses as well as highly uniform loops, and good in color fastness as well. SOLUTION: The spun-toned bulky multifilaments with loops consist of polyamide-based filaments substantially free from fiber length difference, having the following characteristics: the stress at 15% elongation is 0.5-2.0 cN/dtex, loop stability (T) is >=60%, and each of the filaments is uneven in fineness in the direction of fiber axis with the unevenness factor being 1.2-3.0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyamide-based spun bulky multifilament. More specifically, the high process passability is good, and when it is made into a fabric, it has a soft and smooth spanning texture,
The present invention relates to a spun bulky multifilament having a small difference in light and shade color due to thick and thin spots and exhibiting a natural heather-like appearance.

[0002]

2. Description of the Related Art Conventionally, polyamide fibers have been used not only for clothing but also for various fields such as industrial use and interior use due to their excellent properties. However, these polyamide fibers such as nylons 6 and 66 had poor dryness and smooth feel compared to natural fibers such as silk and hemp.

[0003] Means for imparting a dry feeling to polyamide fibers include deforming the fiber cross section, modifying the polymer,
Various attempts have been made, such as adding particles to a polymer, and in recent years, a method of giving a dry and mottled fiber structure by giving a fineness in the fiber axis direction has been studied. However, all of them are commercialized fiber structures made of polyester fibers represented by polyethylene terephthalate.

Japanese Patent Publication No. 22576/1972 and Japanese Patent Publication No. 44/1988 discloses a method for imparting thickness with polyamide fibers.
No. 7744, a method of generating melt fracture utilizing abnormal flow in a spinneret,
No. 15573, JP-A-55-122017,
Japanese Patent Application Laid-Open No. 58-362107 discloses a method of spinning a mixture of different kinds of polymers. However, any of these methods is liable to cause yarn breakage, resulting in unstable yarn production and poor productivity.

Japanese Patent Application Laid-Open No. Sho 62-191510 discloses a method in which an undrawn yarn is heat-treated at a low elongation or an overfeed state and then drawn at room temperature. Not only can the spherulites have a long and thin cycle length be obtained, but also because the spherulites are formed while suppressing the orientation in the unstretched stage, the spherulites become structural defects and only those having low strength properties can be obtained. Further, since the crystallinity is high at the yarn stage, the heat setting property in the high-order processing step is poor.

Japanese Patent Publication No. 4-5772 discloses a method in which an undrawn yarn or a semi-drawn yarn is subjected to entanglement and then non-uniformly drawn near a natural drawing ratio. Since the dots formed the details and the non-entangled points formed the thick portions, the thick and thin phases between the single fibers were completely aligned, and only the appearance having a clear difference in shades of color was obtained.

[0007]

DISCLOSURE OF THE INVENTION The present invention is intended to provide a soft, smooth and soft surface by providing a natural color with a small color difference due to dyeing and having a nearly plain plain spot, and having a large number of fine irregularities and small loops on the fabric surface. It is an object of the present invention to obtain a material suitable for a woven fabric for clothing giving a spanned texture.
Further, it is intended to provide a product having good passability in high-order processes such as weaving and good color fastness.

[0008]

In order to solve the above-mentioned problems, a spun bulky multifilament of the present invention mainly has the following constitution. That is, a bulky multifilament composed of a plurality of polyamide-based filaments having substantially no fiber length difference and having a loop,
The 15% elongation point stress of the multifilament is 0.5 to 0.5%.
2.0 cN / dtex and loop stability (T) of 60
% Or more, and the filament constituting the multifilament has a thickness along the fiber axis direction, and the thickness ratio is 1.2 to 3.0. is there.

The fabric of the present invention mainly has the following constitution. That is, the present invention provides a fabric characterized in that the above-mentioned span-controlled bulky multifilament is used at least in part.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The main component of the high-spun multifilament of the present invention is not particularly limited as long as it is polyamide, but nylon 6 and nylon 66 are preferred in view of fiber forming ability and mechanical properties. In addition, moisture-absorbing and water-absorbing substances such as sodium polyacrylate, poly (N-vinylpyrrolidone), polyacrylic acid and its copolymer, polymethacrylic acid and its copolymer, polyvinyl alcohol and its copolymer, and cross-linked polyethylene oxide polymer A general-purpose thermoplastic resin such as polyamide, polyester, and polyolefin may be contained within a range not to impair the object of the present invention. Further, in addition to pigments such as titanium oxide and carbon black, conventionally known antioxidants, coloring inhibitors, light stabilizers, antistatic agents, and the like may be contained as long as the object of the present invention is not impaired.

The bulky multifilament of the present invention has a large number of loops, and the loops can be formed by performing a fluid turbulence treatment which is generally used. At this time, the 15% elongation point stress of the spun bulky multifilament of the present invention is 0.5 to 0.5 to obtain a high quality spun bulky yarn having fine and stable loops.
2.0 cN / dtex, preferably 0.6 to 1.5 cN
/ Dtex, more preferably 0.7 to 1.2 cN / d
tex. This is because, during fluid turbulent flow processing, the more easily the fiber bends (the lower the bending stiffness), the easier it is to form a loop, and at the same time, the more flexible the external force received in higher-order processes such as weaving, the more the external force becomes This is because it is easy to absorb and has the effect of preventing the loop from disappearing. Fifteen
When the% elongation point stress is less than 0.5 cN / dtex, permanent strain with respect to an external force is likely to remain, resulting in poor practical durability. On the other hand, when it exceeds 2.0 cN / dtex, there is a problem that the loop stability is low with respect to an external force received in a higher-order process such as weaving, and the loop partially disappears.

Further, the bulky multifilament of the present invention needs to have a loop stability T (%) of 60% or more. The loop stability T is a value measured by the following method, and is one of the indexes for measuring the high-order processability and the quality of the obtained bulky yarn.

The loop stability T was measured using a loop measuring device FRAY COUNTER MODEL-104 manufactured by Toray Industries Co., Ltd. and passed through a detector (for SPUN) at a tension of 0.088 cN / dtex.
Based on the yarn surface having the largest number of loops, the number of loops at a point 0.35 mm outside the yarn surface is measured, and is set as the small loop number N1 (number / m). Similarly, tension 0.44 cN
The number of small loops is measured using / dtex, the number of small loops is set to N2 (number / m), and the loop stability rate T is calculated from the obtained values of N1 and N2 by the following equation.

Loop stability T (%) = (N2 / N1) × 100 When the loop stability T is lower than 60%, when weaving is performed using the bulky yarn as the weft, the weft flight tension in weaving causes The number of loops is reduced, and it is difficult to obtain a fabric having a desired soft span-like texture. Further, unevenness in the yarn running tension in the width direction of the loom appears as a change in the number of loops as it is, causing unevenness in the weft direction of the fabric, and the quality of the fabric is reduced.

The higher the loop stability ratio T, the better, and also has the advantage that the higher processing speed can be greatly increased.

The number of loops N1 and N2 on the surface of the bulky multifilament counted by the above measurement are as follows:
It is preferably at least 80 pieces / m, more preferably at least 100 pieces / m, in order to improve the tactile sensation of the fabric.

The bulky multifilament of the present invention is composed of filaments having a diameter and width in the fiber axis direction. Give a tactile sensation. Further, since this thick and thin form has a difference in fiber structure, when dyed, it presents a natural spot feeling in which the difference in shades is not too large. Thickness ratio in the fiber axis direction prevents the difference in light and shade color when dyed is overemphasized, and the fiber structure of the thick part becomes loose and the fiber is not sufficiently strong to limit the application. From the viewpoint of performing, the thickness ratio of the filament along the fiber axis direction is 1.2 to 3.0, preferably 1.3.
To 2.5. When the thickness ratio is less than 1.2, the appearance of the dyed fabric becomes a uniform homogeneous material unique to synthetic fiber without unevenness, and also has a dry feeling and a smooth feeling which is the object of the present invention. The texture does not appear. On the other hand, if the thickness ratio exceeds 3.0, there is a problem that the light and shade color difference in a dyed fabric is excessively emphasized.

Note that the term "thickness / fineness ratio along the fiber axis direction" as used in the present invention refers to the ratio of the cross-sectional area between the thick portion and the thin portion in the fiber axis direction (thickness / fineness). Take a photograph of the cross section of the thick fine part and fine fine part of the removed filament using an optical microscope,
Calculate by area ratio.

The bulky multifilament of the present invention has a different cross-sectional area between constituent filaments even in its cross section. As in the conventional thick and thin yarn, there is substantially no thick and thin in the cross section, and when there is thick and thin only in the fiber axis direction, the thickness as a multifilament becomes large, and when a dyed fabric is used. The light and shade color difference is emphasized too much, and the surface unevenness effect due to the thickness and width is difficult to develop. The CV% of the cross-sectional area of all the filaments in the multifilament cross section is preferably in the range of 5 to 50%, and more preferably in the range of 10 to 40%.

The CV% of the cross-sectional area in the cross-sectional direction in the present invention is obtained by taking a cross-section of a multifilament using an optical microscope, measuring the cross-sectional area of all the constituent filaments, and calculating the value from the value of the total filament cross-sectional area. It is calculated by the following equation.

C of filament cross section in yarn cross section
V% = σ _n / A × 100 where σ _n : standard deviation obtained from all filament cross-sectional areas, A: average value of cross-sectional areas obtained from all filament cross-sectional areas.

In the present invention, the bulky multifilament has a dry heat shrinkage at 160 ° C. of preferably 15% or less, more preferably 12% or less. Refining after weaving, heat setting,
This is because fabric shrinkage due to heat history such as dyeing can be suppressed to a small extent, and fabric design becomes easy.

The cross-sectional shape of the bulky multifilament of the present invention may be a round cross section, a triangular cross section, a multi-lobal cross section,
A flat cross section, an H-shaped cross section, a π-shaped cross section, a C-shaped cross section, or other well-known cross sections may be used. Among them, the degree of irregularity having 3 to 8 convex portions in terms of silky texture, gloss and high water absorption.
A multi-lobal cross section of 2 to 5.0 is preferred, and an irregularity of 1.6 to 3.0 is more preferred. Here, the degree of irregularity refers to a radius ratio R1 / R2 of a circumscribed circle R1 and an inscribed circle R2 of an irregular cross section as shown in FIG. Further, a hollow portion may be provided inside the fiber. Further, a cross-section mixed multifilament obtained by mixing two or more types of irregular cross sections may be used.

The fabric form can be appropriately selected depending on the purpose, such as a woven fabric, a knitted fabric, or a non-woven fabric.
It is preferable to use a woven fabric using the bulky multifilament of the present invention at least for warp and / or weft.

Next, an example of a method for producing a bulky multifilament of the present invention will be described with reference to FIG.

First, a desired undrawn yarn 3 is obtained by a melt spinning method using a spinning machine shown in FIG.
A fluid swirling nozzle 5 is provided between the godet roller 4 and the second GR 6, and the running yarn is brought into contact with the heated second GR while generating a knotted balloon to perform low-magnification stretching. Further, heat setting is performed on the second GR 6 to produce a polyamide-based multifilament having a large and small diameter.

The multifilament thus obtained is used as a supply raw yarn and is processed by a loop processing machine having a generally used fluid turbulence processing nozzle shown in FIG. 2B.

The processing conditions at this time are as follows: desired loop characteristics (loop stability T is 60% or more, 0.44 cN / dte
The number of loops under x tension is 80 pieces / m or more), and the amount of water applied by the water application device 10 before nozzles is 10 cc / min or more, the feed roll 9 and the delivery roller 1
Preferably, the overfeed rate is between 8 and 22%, and the supply air pressure of the fluid turbulent nozzle 11 is 0.4 to 1.4 MPa.

[0029]

The present invention will be described in more detail with reference to the following examples. In addition, each characteristic value in an Example was calculated | required by the following method. A. Strong elongation characteristics, 15% elongation point stress Strong elongation, 15% elongation point stress are manufactured by Orientec Co., Ltd.
Measured with TENSILON UCT-100. The measurement conditions were as follows: sample length: 5
An SS curve (stress-strain curve) was obtained at cm, a tensile speed of 5 cm / min, and a chart speed of 10 cm / min, and the strength and 15% elongation point stress were calculated from the fineness separately measured. The number of times of repeated measurement was set to 10, and the average value was used as the value of each characteristic value.

B. Loop stability factor T Loop stability factor T is a loop measurement device FRAY manufactured by Toray Industries, Inc.
Using COUNTER MODEL-104, pass through a detector (for SPUN) at a yarn speed of 50 m / min and a tension of 0.088 cN / dtex.
Based on the yarn surface having the largest number of loops, the number of loops at a point 0.35 mm outside of the yarn surface is measured, and is set as the small loop number N1 (number / m). Similarly, a tension of 0.44 cN /
The number of small loops is measured with dtex, and the number of small loops N2 (number /
m). Each measurement was performed for 1 minute (yarn length 50 m), and this was repeated five times and represented by the average value. The loop stability T was calculated from the obtained values of N1 and N2 by the following equation.

Loop stability T (%) = (N2 / N1) × 100 Thickness Ratio in the Filament Fiber Axial Direction Using an optical microscope, a photograph was taken of the cross section of each of the ten filaments taken out of the multifilament, and the thickness ratio was calculated.

Thickness ratio = cross section area of thick section / cross section area of detail D. CV% of the cross-sectional area in the cross-section direction of the multi-filament
Photographs of the cross section were taken at five locations for each cm, the cross-sectional areas of all the filaments in each cross section were measured, and calculated from the value of the total filament cross-sectional area by the following equation.

C of filament cross-sectional area in cross section of yarn
V% = σn / A × 100 However, sigma _n: all standard error obtained from the filament cross-sectional area, A: average value of the cross-sectional area calculated from all filament cross-sectional area.

E. Dry heat shrinkage rate Measured according to the method A described in JIS L 1013 Test Method for Chemical Fiber Filament Yarn. That is, a scale sample having a circumference of 1.125 m was prepared with a measuring machine, and subjected to shrinkage and humidity control (humidity control at 20 ± 2 ° C. and 65 ± 2% relative humidity) for 2 hours.
/ 34 under a load of (cN / dtex), and L ₀ by measuring the sample length after 30 seconds. This sample is placed in an oven-type drier free of both ends and heat-treated at 160 ° C. for 15 minutes. Next, the sample after the dry heat treatment is taken out of the oven,
Allow to cool and humidify for 2 hours in the room, and re-use 1/34 (cN / dt)
ex) was applied, and the sample length was measured 30 seconds later to obtain L, and the dry heat shrinkage was determined by the following equation. The measurement was performed by sampling at any five locations.

Dry heat shrinkage (%) = {(L ₀ −L) / L ₀ } × 100 Light fastness Measured according to the method described in JIS L 0842 Dye Fastness Test Method. The 10-hour irradiation was graded 3, the 20-hour irradiation was graded 4, and the 40-hour irradiation was graded 5. The fading of the sample was judged by the gray scale based on the fading of the blue scale.

G. Washing Fastness After treatment according to the method described in JIS L 0844 (A-2) Dyeing Fastness Test Method, the degree of fading before and after washing was evaluated by gray scale according to the following criteria.

Grade 5: No fading is observed.

Grade 4: Almost no fading.

Grade 3: Slight fading is observed.

Second grade: Discoloration is observed.

Grade 1: Discoloration is severe.

Example 1 The relative viscosity ηr in sulfuric acid was 2.
The nylon 6 polymer 70 is melted and discharged from a spinneret having 48 Y-shaped discharge holes at a spinning temperature of 270 ° C. by a spinning machine shown in FIG. 2a, and a straight oil agent (non-water-containing oil agent) is adhered by a guide oil supply device. After 1 GD roller peripheral speed 100
Direct spinning and drawing at 0 m / min, 2 GD roller peripheral speed 2000 m / min (drawing ratio 2.0 times), 1 GD to 2 GD
The working pressure and pneumatic pressure are controlled by a fluid swirling nozzle provided between them.
The film was stretched at a temperature of 2GD roller at 140 ° C. while being false twisted at 3 MPa to obtain a polyamide-based multifilament having a thickness of 120 filaments and 48 filaments. When the irregularity of the fiber cross section of the multifilament was measured,
It was 1.8. Next, the multifilament is placed in FIG.
To a loop processing machine having a commonly used fluid turbulent flow processing nozzle (Hemajet T311 manufactured by Heberline Co., Ltd.), applying water before the nozzle at 30 cc / min, operating pressure of the nozzle at 0.8 MPa, overfeed rate of 12%, By processing at a winding feed rate of -2% and a processing speed of 625 m / min, a bulky multifilament having many loops was obtained.

The 15% elongation point stress of the multifilament is 1.0 cN / dtex, the number of loops N1 under a tension of 0.088 cN / dtex is 148 / m, 0.44 cN / d.
The number of loops N2 under the dtex tension was 117 / m, and the loop stability T was 79%. The thickness ratio in the fiber axis direction was 2.1, and the total area (48 filaments) of the cross section in the cross section direction of the multifilament was measured. As a result, FIG. 3 was obtained, and the CV% of the cross section area was 25%. .3
%Met.

Next, the multifilament was woven as a warp and a weft, set in a greige machine at 180 ° C., then refined in a conventional manner, dyed, and set at 170 ° C. to obtain a feather. The multifilament of Example 1 had stable high-order process passage properties, and a uniform loop was formed on the surface of the obtained woven fabric.

The obtained sample was subjected to a sensory evaluation. As a result, it was found that the fabric surface had a natural appearance with a small difference in shades of light and shade, and had a soft and smooth span-like touch. In addition, the light fastness and the washing fastness were all quaternary, and the dyeing fastness was also good. Table 1 shows the evaluation results.

In Table 1, the term "nozzle pressure" in the section "spinning conditions" refers to the "fluid swirling nozzle pressure" and the term "feed rate" refers to the "feed rate" in the section "bulk processing conditions". ”And“ nozzle pressure ”means“ fluid turbulent nozzle pressure ”
In the "loop characteristics" section, "loop N1" means "tensile 0.
The number of small loops at 088 cN / dtex ”
"2" means "the number of small loops at a tension of 0.44 cN / dtex", "thickness ratio" means "thickness ratio in the fiber axis direction",
The “cross-sectional area CV%” means “CV% determined from the cross-sectional area of all filaments in the multifilament cross-sectional direction”
The “dry yield” means the above-mentioned dry heat shrinkage at 160 ° C., respectively.

[0047]

[Table 1] (Example 2 and Example 3) 1 GD roller peripheral speed was set to 120
The operation was performed under the same conditions as in Example 1 except that the stretching ratio was changed to 0 m / min and 700 m / min. The sample of Example 2 in which the peripheral speed of the 1GD roller was 1200 m / min had an appearance in which the color difference was slightly stronger than that of Example 1, but was an excellent product having a soft and smooth span-like touch. . In addition, the peripheral speed of 1GD roller is 700m
The sample of Example 3 at / min was a product having an appearance closer to solid color dyeing than that of Example 1 and a slightly soft and dry feeling, but having a soft feeling and a span-like touch. The evaluation results are also shown in Table 1.

(Comparative Example 1 and Comparative Example 2) The operation was performed under the same conditions as in Example 1 except that the peripheral speed of the 1GD roller was 1500 m / min and 600 m / min, and the stretching ratio was changed.
Comparative Example 1 in which the peripheral speed of a 1GD roller was 1500 m / min.
The sample No. was liable to cause thread breakage during the bulking process, and had an appearance in which the difference in shades of color was stronger than that of Example 1, and permanent distortion against external force was likely to remain, resulting in poor practical durability. . In addition, the peripheral speed of 1GD roller is 60
The sample of Comparative Example 2 at 0 m / min exhibited stable processing characteristics, but the loop was easily lost due to the weft tension received during weaving, and loop spots were generated in the width direction of the fabric. Further, the appearance after dyeing was almost plain dyeing, and the spot-like appearance with spots intended by the present invention was not exhibited. The evaluation results are also shown in Table 1.

(Examples 4 and 5) The operation was performed under the same conditions as in Example 1 except that the temperature of the 2GD roller was changed.
The sample of Example 4 in which the temperature of the 2GD roller was 160 ° C. had an appearance closer to solid color dyeing than that of Example 1, and gave a dry feeling.
Although it was slightly inferior in feel, it was a product having a span-like touch with excellent softness. Further, the sample of Example 5 in which the temperature of the 2GD roller was 100 ° C. had a smoothness equal to or more than that of Example 1, and was an excellent product having a span-like touch. The evaluation results are also shown in Table 1.

(Comparative Example 3) The same procedure as in Example 1 was carried out except that the fluid swirling nozzle in the stretching zone was removed and the stretching ratio was changed by setting the peripheral speed of the 1GD roller to 650 m / min. The sample of Comparative Example 3 was a product in which the appearance after dyeing was almost plain-dyed and no spotting was felt, and lacked a dry feeling and a dry feeling. The evaluation results are also shown in Table 1.

(Comparative Example 4) Peripheral Speed of 1GD Roller 700
m / min, the peripheral speed of the 2GD roller was 1,400 m / min, and the discharge amount of the molten polymer was changed so that the fineness after stretching was 120 decitex and 48 filaments. The sample of Comparative Example 4 was liable to cause thread breakage during the bulking process, further emphasized the light and dark color difference due to thick and thin, and had poor appearance quality. In addition, permanent distortion to external force is likely to remain,
Since the color fastness was as low as 3 grade, it was inferior in practical durability. The evaluation results are also shown in Table 1.

(Example 6) In the spinning machine shown in Fig. 2a, two types of Y-shaped discharge holes having different sizes (16 large hole sizes and 32 small hole sizes, 48 in total) were used. The procedure was carried out under the same conditions as in Example 1 except that the melt was discharged from the die. The discharge amount ratio per single hole immediately below the base was large hole: small hole = 1.9: 1. The 15% elongation stress at the multifilament is 1.2 cN / dte.
x, number of loops N1 under 0.088 cN / dtex tension
Is 133 loops / m, the number of loops N2 under tension of 0.44 cN / dtex is 104 loops / m, and the loop stability T is 7
8%. The thickness ratio in the fiber axis direction was 2.0, and the CV% of the cross-sectional area in the cross-sectional direction was 42.9%.

The obtained sample was subjected to a sensory evaluation. As a result, the fabric surface was an excellent product having a natural appearance with a small difference in shades of light and shade and a soft and smooth span-like touch. Table 1 shows the evaluation results.

(Example 7) 2GD roller temperature was set to 100
The procedure was performed under the same conditions as in Example 6 except that the temperature was changed to ° C.
The sample of Example 7 had a stronger difference in light and shade color than that of Example 1,
The product had an inferior appearance, but had a soft and smooth span-like feel. Table 1 shows the evaluation results.
Shown in

Example 8 The relative viscosity ηr in sulfuric acid was 2.
70 nylon 66 polymer and spinning temperature of 295 ° C
The procedure was carried out under the same conditions as in Example 1 except that the conditions were changed to. As in the case of Example 1, the sample of Example 8 exhibited a natural appearance with a small difference in shades of light and shade, and was an excellent product having a soft and smooth span-like touch. Further, the light fastness was 4th grade, and the washing fastness was 4th to 5th grades. Table 1 shows the evaluation results.

Example 9 An example 9 was carried out under the same conditions as in Example 1 except that the shape of the discharge hole of the die was changed to a circle. Example 9
The sample of No. 1 had a smaller number of loops than that of Example 1 and had a slightly lacking softness, but was a product having a better texture than the conventional product. Table 1 shows the evaluation results.

[0057]

EFFECTS OF THE INVENTION A multifilament having excellent process stability in the spinning process and bulky processing process, with less loop disappearance in the high-order processing process and high loop stability. It has a small natural heather-like appearance,
Combined with a highly homogeneous loop, it provides a soft and smooth feeling due to minute unevenness, and provides a material and a product with good dyeing fastness.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fiber for explaining the degree of heterogeneity of a fiber cross-section preferred in the present invention.

FIG. 2 is a schematic view of an example of a spinning and take-off device and a loop processing machine for producing a bulky multifilament having a spun tone according to the present invention.

FIG. 3 is a graph showing the cross-sectional area of all single fibers (48 filaments) in the cross-sectional direction of the multifilament in Example 1.

[Explanation of symbols]

 1: Base 2: Oil supply device 3: Thread 4: First GR 5: Fluid swirl nozzle 6: Second GR (hot roller) 7: Winding machine 8: Multifilament package for bulk processing 9: Feed roller 10: In front of nozzle Water application device 11: Fluid turbulent nozzle 12: Delivery roller 13: Winding machine

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D03D 15/00 D03D 15/00 BF Term (Reference) 4L035 AA08 BB36 BB89 BB91 DD02 DD12 DD20 EE08 FF10 4L036 MA06 MA20 MA33 PA01 PA03 PA15 PA26 PA41 RA04 RA05 UA02 UA21 4L045 AA05 BA03 BA15 BA33 BA36 BA49 BA60 CA25 CA40 CB13 DA08 DA14 DA42 DA44 DC02 4L048 AA24 AA36 AA37 AB08 AB21 AB23 AC08 BA01 BA02 CA09 CA16

Claims (5)

[Claims] 1. A bulky multifilament comprising a plurality of polyamide filaments having substantially no fiber length difference and having a loop, wherein the multifilament has a 15% elongation point stress of 0.5 to 2. 0 cN / dtex and a loop stability (T) of 60% or more,
A spun multi-filament multifilament, characterized in that the filaments constituting the multifilament have thicknesses and widths along the fiber axis direction, and the thickness ratio is 1.2 to 3.0. 2. In a cross section of the multifilament,
2. The multifilament having a spun-tone bulkiness according to claim 1, wherein a cross-sectional area is different between constituent filaments, and CV% of a cross-sectional area in a cross section is 5 to 50%. 3. The multifilament according to claim 1, wherein the number of loops on the surface of the multifilament under 0.44 cN / dtex tension is 80 / m or more. 4. A fiber cross section of a polyamide filament constituting a multifilament is a multi-lobal cross section having 3 to 8 projections, and the degree of irregularity is from 1.2 to 4.
The spun bulky multifilament according to any one of claims 1 to 3, which is 5.0. 5. A fabric comprising at least a part of the bulky multi-filament spanning filament according to claim 1.