JPH03180529A - Crimped yarn - Google Patents

Abstract

PURPOSE:To obtain crimped yarn suitable for carpet by randomly interlacing single yarns of two kinds of synthetic fiber multifilaments having specific physical characteristics and different section shapes to form crimped yarn. CONSTITUTION:Crimped yarn comprising two kinds of synthetic fiber multifilaments A and B wherein (A) each single yarn (a) of synthetic fiber multifilament A is irregularly interlaced with (B) each single yarn (b) of synthetic fiber multifilament B and correlation of the two kinds of synthetic fiber multifilaments A and B forming the crimped yarn satisfies fineness 0.3B<=A<=0.7B; degree of single yarn A<B; fineness of single yarn 1.2b<=a<=3.0b, 7<=a<=60 and 3<=b<=25; both single yarns (a) and (b) have crosssectional shape of single yarn of Y type section; deformation degree of single yarn 0.2b<=a<=0.7b, 1.2<=a<=5.0 and 2.0<=b<=7.0; number of crimps a<b, to give the objective crimped yarn.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a crimped yarn made of a crimped synthetic fiber multifilament. Each single yarn of a fiber multifilament is randomly intertwined to form a single crimped yarn, and the present invention relates to a crimped yarn that is particularly preferably used for carpets.

[Prior art] Multiple crimped yarns with different dyeability are combined using a fluid nozzle to create a crimped yarn in which darkly dyed single yarn and lightly dyed single yarn coexist in one crimped yarn. For example, JP-A-55-8
It is known from Publication No. 4429.

In addition, two filaments having different single filament deniers and hot water shrinkage rates are interlaced or aligned and plied, and the resulting gold thread filament and the two types of single filament deniers that form the combined filament, A filament with a special texture obtained by false twisting filaments with thick single yarn denier and high hot water shrinkage rate.
For example, it is known from Japanese Patent Publication No. 63-44850.

[Problems to be Solved by the Invention] In the case of the crimped yarn described in JP-A-55-84429, a plurality of crimped yarns that can be differentially dyed are combined using a fluid treatment device. It is made into a single crimped thread. Examples of differential staining include dark acid staining, light acid staining, and cation staining.

However, the crimped yarn described in JP-A No. 55-84429 is produced by feeding a plurality of pre-crimped multifilaments at different feeding speeds and combining them using a fluid processing device. It is something that is threaded. and,
The crimped yarn obtained by combining yarns forms long loops due to the difference in feeding speed, and although there are crimped yarns and crimped yarns that form short loops, the crimped yarns are not crimped beforehand. Since each single yarn of the applied crimped yarn is already intertwined, it is almost opened in the fluid treatment device, and several single yarns of other crimped yarns are combined. The majority of these single yarns exist in a state where the single yarns of each crimped yarn are gathered together. Therefore, when the yarns are combined and dyed in multiple colors, the crimped yarns of different colors are in a state where they are simply combined, and there is virtually no random mixing of each single yarn, and the dyeability in the cross section is There is almost no change in the intertwining state of each single yarn of different crimped yarns in the length direction.

Therefore, when the obtained crimped yarn is dyed and made into a carpet, if you closely observe the crimped yarn itself, you will see that it is dyed in many colors, but when you look at the carpet as a whole, the long loop colors dominate. However, there was a problem in that it did not result in a deep color with a soft touch.

On the other hand, in the case of the fiber described in Japanese Patent Publication No. 63-44850, filaments having different finenesses and heat shrinkage rates are false twisted using a fluid treatment device to form a mixed yarn.

Although the obtained mixed fiber yarn has bulkiness, it is not a crimped yarn used in carpets, but a cloth with a soft surface can be obtained. All of the above-mentioned single yarns have circular cross-sections, and when made into crimped yarns, they have poor bulkiness.In this respect, they are not only unsuitable for use in carpets, but also have poor bulkiness. The problem was that it could not be a certain color.

An object of the present invention is to provide a crimped yarn that solves the problems of the prior art described above.

[Means and effects for solving the problems] The structure of the present invention is as follows: <1) A crimped yarn, the crimped yarn is composed of two types of synthetic fiber multifilaments A and B, and Each single yarn of the single yarn a and the synthetic fiber multifilament B is irregularly intertwined, and the mutual relationship between the two types of synthetic fiber multifilaments A and B forming the crimped yarn is as follows: ) Fineness: 0.38≦A≦0.7B (b) Number of single yarns: A<B (c) Single yarn fineness: 1.2b≦a≦3. Ob7≦a≦6
03≦b≦25 (d) Cross-sectional shape of single yarn...both a and b are Y-shaped cross sections (e) Single yarn deformation degree...0.2b≦a≦0゜7b1.2≦a
≦5.0 2.0≦b≦7.0 (f) Number of crimps: a crimped yarn, characterized in that a<b.

(2) The total fineness of the crimped yarn made of synthetic fiber multifilaments A and B is 600 to 20,000 deniers, the crimp elongation rate is 7.0 to 40.0%, and the boiling water shrinkage rate is 6.0%.
The crimped yarn according to (1) above, which is as follows.

(3) Synthetic fiber multifilaments A and B are polyamide fibers (1) and (
2) The crimped yarn described above.

It is in.

FIG. 1 is a partial cross-sectional view of a crimped yarn according to the present invention,
This corresponds to the cross section of the crimped yarn enlarged approximately 260 times.

The crimped yarn according to the present invention is a crimped yarn made by combining fiber multifilaments A and B, and is a crimped yarn preferably used for tufted carpets, particularly for cut pile carpets. Synthetic fiber multifilaments A and B, which are the crimped yarns used and form the crimped yarns, have the following relationships, respectively.

The fineness (denier) of synthetic fiber multifilament A is smaller than that of synthetic fiber multifilament B, which is 0.3.
It is within the range of 8≦A≦0.7B (1 formula).

Regarding the number of single yarns (strands), the single yarn a of the synthetic fiber multifilament A is smaller than the single yarn 2 of the synthetic fiber multifilament B, and a<b (equation 2).

The fineness (denier) of single yarn a and the fineness (denier) of single yarn a are 1.2b≦a≦3.0b (3 formulas), 7≦a≦6
0 (Formula 4) and 3≦b≦25 (Formula 5), and single yarn a is extremely thick compared to single yarn su.

Using two types of synthetic fiber multifilaments that do not satisfy the relationships of formulas 1, 2, 3, 4, and 5, but have a single yarn fineness that satisfies formulas 3 to 5, one set is not satisfied, and the fineness of synthetic fiber multifilament A is 0 compared to the fineness of synthetic fiber multifilament B.
If it is smaller than ゜3B, when the crimped yarn is used in a carpet, many of the single yarns that cover the surface will be exposed on the surface of the carpet, and the difference in hue between the surface and the inside of the carpet will be clear. The fineness of synthetic fiber multifilament A is
Compared to the fineness of synthetic fiber multifilament B, it is 0.7
When B is exceeded, when the crimped yarn is used in a carpet, the surface of the carpet is covered with synthetic fiber multifilament A, and the difference in hue between the surface and the inside of the carpet becomes clear; Each single yarn cannot fully support the synthetic fiber multifilament A, and the synthetic fiber multifilament exposed on the surface tends to fall down, which is a phenomenon called "settling," which is generally used to characterize carpets, resulting in poor durability. .

In addition, if formulas 3 to 5 are satisfied but formula 2 is not satisfied, the surface of the carpet should be made of synthetic fiber multifilament A.
However, the difference in hue from the inside becomes smaller and it becomes difficult to support the synthetic fiber multifilament B, making it more likely to "sag". Additionally, the entire carpet becomes hard and loses its soft feel. In other words, although the carpet has a deep hue and is soft to the touch, it is difficult to obtain a carpet that has little pile "settling" and is excellent in durability.

The cross-sectional shapes of single yarns are Y-shaped cross-sectional shapes for both single yarn a of synthetic fiber multifilament A and single yarn of synthetic fiber multifilament B, and the single yarn deformation degree (%) of single yarn a and single yarn S is , 0°2b≦a≦0.7b (6 formulas), 1.
2≦a≦50 (7 formulas), 2.0≦b≦7.0 (8 formulas)
Therefore, the single yarn has an extremely high degree of single yarn deformation compared to the single yarn a.

The number of crimps (crests/inch) per unit length is a<b (
9), and there are more single yarns than single yarns a.

The cross-sectional shapes of the single yarn a and the single yarn S are Y-shaped, the single yarn deformation degree of the single yarn a is 1.2≦a≦5.0, and the single yarn deformation degree of the single yarn S is 2.0. Within the range of ≦b≦7.0, and the degree of single yarn deformation of these single yarns a and 2 is 0.2b≦
By setting a≦07b, it is possible to obtain a carpet that has excellent bulk as a crimped yarn for carpets, has an excellent texture when made into a carpet, and has excellent abrasion resistance.

When the degree of deformation of the single yarn a of the synthetic fiber multifilament A is less than 1.2, the bulkiness is poor and when made into a carpet, the filament is hard and has a poor texture.
When the degree of deformation of the single yarn a exceeds 5.0, the texture is poor and the abrasion resistance is poor.

On the other hand, when the degree of deformation of the single threads of the synthetic fiber multifilament B is less than 2.0, the crimpability of the single threads is poor and a phenomenon occurs in which the single threads protrude beyond the eye threads a. There is. Furthermore, if the degree of deformation of the single yarns exceeds 7.0, the single yarns become hard and cannot bend the single yarns a, resulting in a carpet with poor elasticity and poor feel.

The degree of deformation of the single yarn a and the single yarn S is 0゜2b≦a≦
By satisfying the relationship of 0.7b, the crimped yarn in which the single yarn a and the single yarn of the crimped yarn coexist will cause a different phase shift,
When the swelling of the crimped yarn is increased and a carpet is made, each single yarn of synthetic fiber multifilament B with a small spring constant supports each single yarn a of synthetic fiber multifilament A with a large spring constant, and the special wind At the same time, the surface is covered with the single filament a, it looks dark and has good color development,
The single thread inside looks light colored.

That is, the crimped yarn according to the present invention produces a deep color due to the above-mentioned texture and the difference in hue between the surface and interior of the carpet, so that it can be made into a carpet with an extremely luxurious feel.

When the crimped yarn according to the present invention is made into a carpet, especially a cut pile carpet, the crimped yarn of synthetic fiber multifilament B has a large shrinkage and mainly constitutes the inside of the carpet, and the crimped yarn of synthetic fiber multifilament A support.

On the other hand, since the crimped yarn of synthetic fiber multifilament A has a small shrinkage, it will mainly constitute the surface of the carpet.

Therefore, the surface of the carpet is made up of relatively upright thick filaments with a low degree of deformation at intervals, so when you touch the carpet, it feels soft and resilient even though it is a thick filament. Excellent. Furthermore, since the interior of the carpet is composed of fine filaments with a high degree of deformation and high crimp, when the carpet is pressed in, it has a high density and is rich in bulk.

Therefore, the carpet as a whole is soft to the touch, bulky, and has excellent compressibility and resilience. Moreover, since the surface is covered with thick single fibers with low deformation, it is resistant to abrasion and provides a carpet with less "settling".

In the crimped yarn according to the present invention, when the crimped yarn is used for a cut pile carpet, it is particularly preferable that the fineness of the single yarn a of the synthetic fiber multifilament A is 9 to 40 deniers, and the fineness of the single yarn a of the synthetic fiber multifilament B is 9 to 40 deniers. The fineness of the thread is
4 to 20 deniers, the fineness of the single yarn is at least 2 deniers thinner than the single yarn a, and the degree of deformation of the single yarn a is 1°4 to 4
．． 0, the degree of deformation of the single thread A is 2.5-6°0, and the single thread A is at least 0°8 larger than the single thread A.

The degree of deformation has a particularly large effect on the texture and bulkiness of the carpet, and is determined by a carpet that has zero dignity.If the degree of deformation is too low, the bulkiness will be inferior, and if the degree of deformation is too high, the texture will be hard. Abrasion properties worsen. In addition, the number of crimps has a large effect on the texture and bulk of the carpet, and is determined by the target carpet, but if the number of crimps is too low, the texture of the carpet will be too soft and it will "sag". On the other hand, if the number of crimps is too high, the texture of the carpet will be too hard and feel like felt.

The number of crimps of the synthetic fiber multifilament A is preferably 5 to 15 crimps/inch, particularly preferably 7 to 12 crimps/inch.

On the other hand, the number of crimps of synthetic fiber multifilament B is 7 to
18 threads/inch is good, especially 9 to 15 threads/inch.

The difference in the number of crimps between the synthetic fiber multifilament A and the synthetic fiber multifilament B is preferably 0.5 crimps/inch or more.

The single yarns of synthetic fiber multifilament A and synthetic fiber multifilament B must be randomly mixed with each other in the cross-sectional direction, and the more they are mixed, the better. Since the phase of the two do not shift, the objective cannot be achieved.

The total denier of the mixed yarn of synthetic fiber multifilament A and synthetic fiber multifilament B is the carpet standard (
It is determined by pile length, stitch, and weight).
It is preferably within the range of 600 to 20,000 deniers.

The crimp elongation rate is a characteristic that affects the feel of the carpet, and is preferably within the range of 8.0 to 35.0%. If the crimp elongation rate is less than 8.0%, the bulkiness of the carpet will be poor, and the resulting carpet will have a lot of sagging, or on the contrary,
．． If it is greater than 0%, the texture of the carpet will be too hard,
It is particularly unfavorable for cut pile carpets.

The boiling water shrinkage rate is preferably 6.0% or less; if it exceeds 6.0%, the feel of the carpet becomes hard, and a satisfactory texture may not be obtained, especially in cut pile carpets.

Synthetic fiber multifilament A and synthetic fiber multifilament B forming the crimped yarn according to the present invention are polyamide fibers made of polyamides such as nylon 6, nylon 66, and nylon 610 and copolymers thereof, polyester fibers, and polyacrylic fibers. The two types of synthetic fiber multifilament A and synthetic fiber multifilament B, which are fibers made of a nitrile polymer or the like, may be composed of the same or different polymers.

The degree of deformation of the synthetic fiber according to the present invention is expressed as the ratio of the diameter (r) of the inscribed circle and the diameter (R) of the circumscribed circle of the Y-shaped cross section.

Diameter of circumscribed circle (R) Degree of deformation = Diameter of inscribed circle (r) Also, the number of crimps is determined 12 hours after the yarn is treated with boiling water for 20 minutes.
Air dry the above, read the number of crimps at a certain length (LO) (N), then apply a load of 1 / d to the LO,
L 1 ) was obtained by measuring the length.

Number of crimps = x25.4 (mountain/in)1 In addition, the crimp elongation rate is 12 after treating the yarn with boiling water for 20 minutes.
Air dry for more than hr, apply an initial load (2q/d), and measure the length (L
1), then applying a constant load (100 .mu./d) and measuring the length (L2).

2-Ll Crimp elongation rate = X100 (%) 1 The crimped yarn according to the present invention described above is manufactured by the method described below. This manufacturing method will be described in detail using FIGS. 2 to 4. FIG. 2 is a schematic front view of a crimped yarn manufacturing apparatus according to the present invention, FIG. 3 is a plan view of a spinneret hole for spinning a single yarn of synthetic fiber multifilament B, and FIG.
The figure is a plan view of a spinneret hole for spinning a single yarn a of synthetic fiber multifilament A.

The synthetic fiber multifilament A is extruded from the spinning it 1 and is fed to the metering pump 1 in the spin block 12.
After being weighed at step 3, it passes through a nozzle 14, is cooled by a cooling device 15, is applied with spinning oil by oiling rollers 16 and 17, and then taken off by a take-off roller 18.

On the other hand, the synthetic fiber multifilament B is extruded from the spinning machine 21 and measured by the metering pump 23 in the spin block 22, and then passes through the nozzle 24 to the cooling device 25.
The spinning material is cooled, applied with spinning oil by oiling rollers 26 and 27, and then taken off by a take-off roller 28.

The synthetic fiber multifilament A taken off by the take-up roller 18 is guided to the take-up roller 28, where it is combined with the synthetic fiber multifilament B.

The combined synthetic fiber multifilaments A and B are pre-stretched between the take-off roller 28 and the first stretching roller 30, and are also provided between the take-off roller 28 and the first stretching roller 30. The fibers are randomly mixed in the turbulent region of the air compressed by the fluid processing device 29.

The mixed synthetic fiber multifilaments A and B are
It is stretched between the first stretching roller 30 and the heated second stretching roller 31, and is simultaneously subjected to stretching heat fixing and preheating, and then reaches the crimp nozzle 32, where the crimp nozzle At step 32, crimps are applied using a heated compressed fluid to form a crimped yarn.

The crimped yarn is cooled by a rotating cooling drum 33, passes through a take-up bin 34, is taken up by a take-up roller 35, and is taken up by a winder 36.
It is wound up.

The synthetic fiber multifilament B is spun from the spindle hole 20 having the shape shown in FIG. 3, and the synthetic fiber multifilament A is spun from the spindle hole 10 having the shape shown in FIG. 4. Ll in Fig. 3 is the slit length (m+)
, Hl indicates the slit width (L2 in Fig. 4)
is the slit length (+u+), H2 is the slit width (am
) is shown.

In the method for producing a crimped yarn according to the present invention, particularly before both the synthetic fiber multifilament A and the synthetic fiber multifilament B are subjected to drawing, that is, at the preliminary drawing stage or at the undrawn thread stage. In addition to randomly mixing each single yarn using a fluid treatment device, drawing and crimping are performed with each single yarn being randomly mixed as described above. The purpose is to adopt conditions that satisfy the characteristics of synthetic fiber multifilament A and synthetic fiber multifilament B forming the crimped yarn, the shape of each of these single yarns, and the fiber mixing ratio.

The synthetic fiber multifilament A and the synthetic fiber multifilament B may be spun using the same spinning machine using a spinneret having two types of spinnerets, and may be in a doubled state from the spinning stage.

However, in this case, single yarns having different thicknesses and cross-sectional shapes are cooled at the same time, and it is necessary to give sufficient consideration to the cooling conditions and the selection of the nozzle openings.

[Example] Example 1 Using the apparatus shown in Fig. 2, one spinning machine produced nylon 6.
Nylon 6 multifilament A was obtained by melt spinning the polymer at a rate of 148 g per minute through a nozzle having 68 nozzle holes having the shape shown in FIG. The cap hole has a slit length L2.
was 0.9 mm and the slit width H2 was 0.15.

After the nylon 6 multifilament A was cooled, a spinning oil was applied thereto and the material was taken off with a take-off roller.

In addition, in the other spinning machine, nylon 6 polymer was produced at a rate of 148 g per minute from a nozzle with 96 nozzle holes of the shape shown in Figure 3.
Nylon 6 multifilament B was obtained by melt spinning.

The cap hole used had a slit length Ll of 1.8 m+ and a slit width H1 of 0.12-. Said nylon 6
After cooling, the multifilament B was applied with a spinning oil, taken up by a take-up roller, and combined with the nylon 6 multifilament A.

The combined nylon 6 multifilament A and nylon 6 multifilament B were passed through a turbulent region of compressed air in a fluid treatment device provided between the take-up roller and the first stretching roller, and were randomly mixed. .

Nylon 6 multifilament A and nylon multifilament B, in which each single yarn a and each single yarn of two types of synthetic fiber multifilament A and synthetic fiber multifilament B are randomly mixed, are moved to the first drawing roller. The film was stretched with a second stretching roller heated to 163° C. to a total stretching ratio of 3.50 times, and heat-fixed and preheated during stretching.

The drawn and preheated nylon 6 multifilament A and nylon multifilament B were then introduced into a crimping nozzle, and heated at a heating steam pressure of 9.0 kg/ad, a heating steam temperature of 230° C., and overfeed. A crimped yarn was obtained by crimping at a rate of 21%.

The crimped yarn was then cooled with a cooling drum, passed through a take-up pin and a take-up roller, and then wound up with a winder.

The properties of the obtained crimped yarn are as shown in Table 1, and the crimped yarn was embedded in paraffin and then cut in the transverse direction.
Photographs were taken using a microscope and magnified 260 times. A copy was made based on the photograph and shown in FIG.

As shown in FIG. 1, the single yarns of nylon 6 multifilament A and nylon 6 multifilament B forming the crimped yarn were mixed at random. The state of this mixed fiber was not constant and varied in the length direction of the crimped yarn.

Table 1 Example 2 The crimped yarn obtained in Example 1 was tufted with 1/8G, stitch 9, pile height 5.5, and basis weight 750 g/rd, and was tufted with Kayanol Navy Blue R (Nippon Kayaku Co., Ltd.). 0.30
%0WF) on a Küster continuous dyeing machine. The resulting carpet was soft to the touch, had excellent compressibility and resilience when pressed, and had a deep color and a luxurious feel.

Examples 3 to 8, ratio 12 feeds 1 to 5 Among the conditions of Example 1, the spinning conditions for nylon 6 multifilament A and nylon 6 multifilament B were changed to obtain crimped yarns.

These spinning conditions are shown in Table 2. Further, the properties of the obtained crimped yarn were as shown in Table 3.

Further, a cut pile carpet was obtained using the crimped yarn shown in Table 3 under the same conditions as in Example 2. The characteristics of the cut pile carpet are shown in Table 4. Each symbol in Table 4,
○ is good and has been evaluated as the best in the past, Δ is equivalent to conventional cut pile carpet in the shell, ◎ is extremely good and is better than the above ○, X is inferior to Δ. ○ to ◎ indicate approximately the middle between O and ◎, and × to Δ indicate approximately the middle between × and Δ.

(The following is a blank space) As is clear from Tables 3 and 4, in the cut pile carpet obtained using the crimped yarn according to the present invention, the nylon 6 multifilament with a thick single yarn is exposed on the surface, and the single yarn is exposed on the surface. Nylon 6 multifilament with thick fineness is supported by nylon 6 multifilament with thin fineness and high bulky properties, and it has compressibility and resilience even though it feels soft when in contact with the surface. Wealth,
In addition, nylon 6 multifilament has excellent bulkiness, making it less prone to sagging, and the nylon 6 multifilament has a thick single thread exposed on the surface and has a low density.
Nylon 6 multifilament with a light hue and a thick single yarn, and nylon 6 with a thin single yarn and high bulkiness.
The interior where multifilaments coexist has a high density;
The hue seemed to be deep, and the hue of the surface and interior created a depth of color, making it an extremely luxurious carpet.

Example 9 Among the conditions of Example 1, a polyester multifilament made of polyethylene terephthalate polymer was obtained in place of nylon 6 multifilament B, and a crimped yarn made of the polyester multifilament and nylon 6 multifilament A was obtained. Ta. Next, after obtaining a cut pile carpet using the crimped yarn under the same conditions as in Example 2, the carpet was treated with an acid dye (Kayanol Navy Blue R (Nippon Kayaku Co., Ltd.): 0.
30%0WF), basic dye (Amizen Carotene Yellow GPLH (Hodogaya Chemical Industry Co., Ltd.): 0.24%0WF)
and dyeing aid (sodium phosphate 3.5% OWF.
Disodium phosphate 2.5% 0WF) water solution 8! One-bath multicolor dyeing was performed using (bath ratio 1:100).

The colored carpet had a blue surface and a mixture of blue and yellow on the inside to give a green color, and the blue on the surface and the green on the inside combined to give a carpet with a deep hue.

[Effect of the invention] The crimped yarn according to the present invention is suitable for use in tufted carpets, especially for strength and y
It is excellent as a crimped yarn for dopile carpets, and the carpet obtained using this crimped yarn has single yarns with thick synthetic fiber multifilaments exposed on the surface, and single yarns with thick fineness synthetic fibers. The fiber multifilament is supported by single yarn fineness and high bulky synthetic fiber multifilament, and although it feels soft when in contact with the surface, it has excellent compressibility and resilience, and is also bulky. Synthetic fiber multifilament has excellent elasticity, does not easily sag, has excellent durability, and has a thick single thread exposed on the surface. The interior, where fiber multifilament and single fiber fine-grained, high-bulk synthetic fiber multifilament coexist, has a high density and the hue appears to be dark or has a different hue, and the hue between these surfaces and the interior is different. As a result, the color tone becomes deeper, and it is possible to obtain a carpet with an extremely high-quality color tone.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of a crimped yarn according to the present invention,
This corresponds to the cross section of the crimped yarn enlarged approximately 260 times. FIG. 2 is a schematic front view of the crimped yarn manufacturing apparatus according to the present invention, and FIGS. 3 and 4 show a synthetic fiber multifilament spun attached to the crimped yarn manufacturing apparatus of FIG. 2. FIG. 3 is a plan view of a mouthpiece hole in a mouthpiece to be ejected. to, 20... spinneret hole, 11.21... spinning machine,
13.23... Metering bong, 14.24... Mouthpiece, 15.25... Cooling device,
16.17, 26.27... Oiling roller, 18
．． 28... Take-up roller, 29... Fluid processing device, 30.31... Stretching roller, 32... Crimping nozzle, 33... Cooling drum,
34... Take-up pin, 35... Take-up roller, 36...
... Winding machine. A. B...Synthetic fiber multifilament a. b...Single thread.

Claims (3)

[Claims] (1) In the crimped yarn, the crimped yarn is composed of two types of synthetic fiber multifilaments A and B, and each single yarn a of synthetic fiber multifilament A and each single yarn b of synthetic fiber multifilament B are: The interrelationship between the two types of synthetic fiber multifilaments A and B that are irregularly intertwined and form the crimped yarn is (a) fineness...0.3B≦A≦0.7B (b) Number of single yarns...A<B (c) Single yarn fineness...1.2b≦a≦3.0b7≦a≦
603≦b≦25 (d) Cross-sectional shape of single yarn...both a and b are Y-shaped cross sections (e) Single yarn deformation degree...0.2b≦a≦0.7b1.2≦a
≦5.0 2.0≦b≦7.0 (f) Number of crimps: a crimped yarn, characterized in that a<b. (2) The total fineness of the crimped yarn made of synthetic fiber multifilaments A and B is 600 to 20,000 deniers, the crimp elongation rate is 7.0 to 40.0%, and the boiling water shrinkage rate is 6.0%.
The crimped yarn according to claim 1, which is as follows. (3) The crimped yarn according to claims (1) and (2), wherein the synthetic fiber multifilaments A and B are polyamide fibers.