JP2001003237A - Acetate processed yarn and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acetate processed yarn which has the improved characteristic dry and refreshing touch of acetate yarns and further has an excellent process-passing property and excellent yarn shape stability, and to provide a method for producing the same. SOLUTION: This processed yarn is obtained by alternately forming multiply wound portions and midway portions. The multiply wound portions are formed by triply winding a yarn B around a yarn A. The midway portions are formed by singly winding the yarn A around the yarn B to express a twisted wall shape. The yarn A includes an acetate multi-filament yarn. The apparent thickness of the midway portions is 1.5 to 4 times that of the multiply wound portions, and the average length of the midway portions is 1.5 to 8 times that of the multiply wound portions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processed yarn having a dry feeling and a cool feeling peculiar to acetate and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a fabric using an acetate multifilament yarn is excellent in a dry feeling and a refreshing feeling, and can obtain a unique texture different from other synthetic multifilament yarns. Trends are expected to further improve the feeling of dryness and coolness, and to enhance the design properties due to surface changes such as unevenness and shading. As one of the yarn processing techniques to improve the dryness and coolness due to surface changes, twisted yarn processing to form a wall twisted shape is well known, but generally has the disadvantage of low productivity and high processing cost. have.

[0003] On the other hand, in Japanese Patent Application Laid-Open No. 1-148827, productivity is remarkably improved by using a false twisting machine and optimizing a difference in fineness between a core yarn and a sheath yarn, false twisting conditions, and the like. A wall twisted false twisted yarn and a method for producing the same are disclosed.

[0004] However, even in the case where the slab portion and the middle portion having the twisted wall shape have substantially the same yarn thickness, the processed yarn has an acetate multifilament yarn in the yarn supplied as the core yarn. However, although the texture unique to acetate is partially obtained, the influence of the thermoplastic multifilament yarn other than the acetate multifilament yarn wound on the surface of the slab portion is also likely to be strong, and it is difficult to sufficiently obtain the texture unique to acetate. Was something.

[0005]

SUMMARY OF THE INVENTION The present invention solves such problems in the prior art, and is excellent in design, improves the dry feeling and the cool feeling peculiar to acetate, and has good processability. It is an object of the present invention to provide an acetate processed yarn excellent in yarn form stability.

[0006]

The first gist of the present invention is as follows.
A multiply-wound portion in which the yarn B is triple wound around the yarn A, and a wall-twisted middle portion in which the yarn A is single wound around the yarn B are alternately formed. Processed yarn,
The yarn A contains an acetate multifilament yarn, and the apparent thickness in the middle of the road is 1.5 times the apparent thickness of the multiple winding portion.
The acetate-processed yarn has an average length of 1.5 times to 8 times the average length of the multiple winding portions, and the average length of the middle portion is 1.5 to 8 times.

[0007] A second gist of the present invention is that a yarn B is overfeed-supplied to a twisting area of the yarn A via a guide located at a fixed distance from the yarn A, and a traverse winding is performed around the yarn A. In the false twisting to be turned, the yarn A includes an acetate multifilament yarn and is a method for producing an acetate-processed yarn which is processed under conditions satisfying the following formulas (1), (2) and (3). 100 ≦ HT1 ≦ 160 (1) 200 ≦ HT2 ≦ 250 (2) 8 ≦ OF2 ≦ 25 (3) where HT1 is the first heater temperature (° C.) of the false twister,
HT2 is the second heater temperature (° C.) of the false twister, and OF2 is the overfeed rate (%) in the second heater.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below.

FIG. 1 shows an example of a multiply-wound portion of the acetate-processed yarn of the present invention, and FIG. 2 shows an example of a middle portion of the acetate-processed yarn.

[0010] The present invention has a multiple winding portion in which the yarn B is triple wound around the yarn A, and a wall-twisted shape in which the yarn A is single wound around the yarn B. The middle portion is a processed yarn formed alternately, and the yarn A includes an acetate multifilament yarn. The apparent thickness of the middle portion is 1.5 to 4 times, preferably 2 times the apparent thickness of the multiple winding portion.
Times to 3.5 times, and the average length of the middle part is 1.5 to 8 times, preferably 1.7 to 7 times the average length of the multiple winding portions.
It is necessary to double the length, so that the thread part in contact with the skin is mainly composed of acetate multifilament yarn located in the sheath part in the middle of the road, coupled with the uneven feeling characteristic of the wall twist shape, acetate specific Dry feeling and refreshing feeling are emphasized.

[0011] If the apparent thickness of the middle part is less than 1.5 times the apparent thickness of the multiple winding part, the multiple winding part in which the acetate multifilament yarn is located at the core contacts the skin. And the texture unique to acetate cannot be sufficiently obtained. Further, when the apparent thickness of the middle portion exceeds four times the apparent thickness of the multiple winding portion, the obtained fabric has a tight texture called so-called fluffiness.

On the other hand, when the average length of the middle section is less than 1.5 times the average length of the multiple winding section, the influence of the multiple winding section where the acetate multifilament yarn is located at the core is strong. As a result, the texture peculiar to acetate cannot be sufficiently obtained. In addition, when the average length of the road portion exceeds eight times the average length of the multiple winding portions, the wall twist shape of the road portion collapses.

[0013] The acetate multifilament yarn used in the present invention is a diacetate multifilament yarn having an acetylation degree of 53% to 57%, or an acetylation degree of 60% to 62%.
Any of the following triacetate multifilament yarns can be used. The cross-sectional shape of the yarn is not particularly limited, and in consideration of the texture, gloss, and the like of the woven or knitted fabric obtained from the processed yarn of the present invention, a chrysanthemum shape, a circular shape, a flat shape, and a Y shape are used.
What is necessary is just to select a character. Further, the fineness of the single fiber constituting the acetate multifilament yarn is not particularly limited, but the fineness of the single fiber is increased, for example, 6 dte.
x or more makes the texture of the woven or knitted fabric obtained from the processed yarn of the present invention more emphasize the sharpness and dryness, while reducing the single fiber fineness, for example, 1.5
By setting dtex or less, a soft feeling can be imparted.

[0014] Since the yarn A is located at the core in the multiple winding portion and also plays a role of supporting the strength of the entire yarn, the total fineness of the acetate multifilament yarn constituting the yarn A is:
167 dtex or more and 1150 dtex or less are preferable,
220 dtex or more and 1000 dtex or less are more preferable. When the total fineness is less than 167 dtex, the strength of the yarn A supplied as the core yarn and the obtained processed yarn in the false twisting / twisting region tends to be insufficient, which may cause breakage of the yarn during processing or in a post-process. It will be easier. On the other hand, 115
If it exceeds 0 dtex, the total fineness of the yarn A increases, so that the winding of the yarn B during false twisting tends to be insufficient,
Loops and the like are likely to occur, resulting in poor yarn quality.

[0015] In the acetate-processed yarn of the present invention, when the yarn A is composed of two or more yarns, the yarns constituting the yarn A are entangled with each other, and further, the yarn A and the yarn B are mutually entangled. The entanglement makes it easy to maintain the form of the twisted wall, which is preferable in terms of the stability of the thread form of the twisted wall in the multiple winding portion and the middle of the road, and the passability of the post-process.

[0016] When the yarn A is composed of two or more yarns including an acetate multifilament yarn and a thermoplastic multifilament yarn other than the acetate multifilament yarn, the yarn A may be formed from an acetate multifilament yarn alone. In such a case, it is also possible to suppress a decrease in strength of the processed yarn, which is more preferable.

In the present invention, the thermoplastic multifilament yarn other than the acetate multifilament yarn used for the yarn A is particularly limited, for example, a polyester multifilament yarn, a polyacrylonitrile multifilament yarn, a polyamide multifilament yarn, and the like. Various thermoplastic synthetic multi-filament yarns can be used without any need, and may be selected according to the purpose. However, polyester multi-filament yarns are preferable in terms of yarn quality and dyeability. The cross-sectional shape of the yarn, fineness, dyeing characteristics, and the like are not particularly limited, and may be selected in consideration of a desired texture, a design effect, a different color effect, and the like.

[0018] Further, the acetate multifilament yarn used in the present invention may contain, for example, a high concentration of inorganic particles.
By including a high specific gravity acetate multifilament yarn having a specific gravity of 1.35 or more, it is also possible to obtain a woven or knitted material having an improved drapability. In addition, when the acetate multifilament yarn constituting the yarn A includes the cationic dye-dyeable acetate multifilament yarn, a new color tone effect can be obtained in addition to the characteristic features of the conventional acetate.

[0019] The yarn A may be made of recycled fibrous multifilament yarns such as rayon, processed yarns such as various twisted yarns, various false twisted yarns and various air-processed yarns, and various types of heterogeneous fiber composite yarns. It can also be included, and may be selected according to the purpose.

Further, in the acetate composite textured yarn of the present invention, the fineness D of the acetate multifilament yarn constituting the yarn A is
1 and the fineness D2 of the multifilament yarn constituting the yarn B
The fineness ratio D1 / D2 is preferably 2 to 15,
4-12 is desirable. If the fineness ratio D1 / D2 is less than 2, the shape of the twisted wall in the middle of the road becomes unclear, and the dryness and coolness peculiar to acetate tend to be insufficient. If it exceeds 15, problems in processing stability tend to occur.

Further, in the present invention, the yarn B is formed by the multiple winding portions and the yarn A
It is preferable that the yarn is wound tightly around, and has a good heat setting property that can suppress the collapse of the yarn form, and examples thereof include a polyester multifilament yarn, a polyacrylonitrile multifilament yarn, and a polyamide multifilament yarn. Polyester multifilament yarns are preferred in terms of yarn quality and dyeability. The yarn cross-sectional shape, fineness, dyeing characteristics, etc. are not particularly limited, either.
What is necessary is just to select according to a desired texture, a design effect, a color tone effect, etc.

Next, an example of the method for producing an acetate-processed yarn of the present invention will be described in detail with reference to FIG.

Thread A containing acetate multifilament yarn
1 is constantly supplied by a magnet tensor 2. The yarn B3 is supplied by the supply roller 4 to the yarn A1 in an overfeed state. Thread B3 is Thread A
While being traversed up and down with respect to the yarn axis direction of the yarn A with the guide 5 at a fixed distance from 1 as a fulcrum, the multi-winding portion wound triple around the yarn B is single-wound. The road part is formed alternately and continuously. Next, the yarn is heated and fixed by the contact-type first heater 6 and the false twisting unit 7. Since the multiple winding part is triple-wound and firmly fixed, the twisted state is maintained as it is even after passing through the false twisting unit 7. On the other hand, the middle part is untwisted after passing through the false twisting unit 7 and exhibits a twisting form in a direction opposite to the false twisting direction. In the middle part of the acetate-processed yarn of the present invention, the yarn B3 is disposed at the center of the middle part in the false twisting step, and the yarn A
1 is wound around the yarn B3 to form a wall-twisted form.

Subsequently, a high-temperature heat treatment is performed between the first take-up roller 8 and the second take-up roller 9 by the non-contact type second heater 10 under overfeed, so that the yarn B3 in the middle of the road is sufficiently shrunk. By letting
The yarn A is wound around the yarn B, and is wound by the winding machine 11.

[0025] In the present invention, the contact-type first heater temperature of the false twisting machine needs to be 100 ° C to 160 ° C, preferably 110 ° C to 155 ° C, more preferably 120 ° C to 150 ° C.
° C. When the temperature is lower than 100 ° C., the winding and fixing of the yarn B at the twisted portion becomes unstable, and there is a problem in the stability of the yarn form. On the other hand, when the temperature exceeds 160 ° C., the heating of the acetate multifilament yarn by heating with the heater is increased, and the dry feeling and the cool feeling peculiar to the intended acetate cannot be obtained.

The temperature of the second heater of the false twisting machine is 200 ° C.
250 ° C is required, preferably 210 ° C to 240 ° C
It is. If the temperature is lower than 200 ° C., the amount of shrinkage of the yarn B between the first take-up roller 8 and the second take-up roller 9 becomes small, and the wall twist shape becomes weak. On the other hand, when the temperature exceeds 250 ° C., the load on the heater equipment is increased, the temperature control becomes unstable, and the quality of the acetate multifilament yarn is excessively affected, and fluff is generated.

Further, the overfeed rate in the second heater needs to be 8% to 25%, preferably 10% to 20%.
%. When the overfeed ratio is less than 8%, the amount of shrinkage of the yarn B in the middle of the road is not sufficient, so that the acetate multifilament yarn in the middle of the road is less protruded from the yarn surface, and the desired characteristic texture of acetate is obtained. I can't. If the overfeed ratio exceeds 25%, the processing stability will be significantly reduced, causing thread breakage and the like.

[0028] In the method for producing an acetate-processed yarn of the present invention, the yarn A may be composed of two or more yarns including an acetate multifilament yarn and a thermoplastic multifilament yarn other than the acetate multifilament yarn. This is preferable from the viewpoint of suppressing the decrease in strength, maintaining the form of the twisted wall shape, and ensuring the stability of the wound structure in the multiple winding portion or the middle portion.

In the present invention, the yarn B has a dry heat shrinkage of 1
The thermoplastic multifilament yarn is preferably 2% or more, and more preferably the dry heat shrinkage is 15% or more. If the dry heat shrinkage is less than 12%, the yarn B
The amount of shrinkage of the acetate multifilament yarn is not enough, so that the acetate multifilament yarn may not emerge on the yarn surface,
It becomes difficult to obtain a texture unique to the intended acetate.

[0030] In the present invention, the guide distance 12 from the yarn A1 to the guide 5 is not particularly limited, and may be determined in consideration of the average length of the middle portion, the multiple winding portions or the processing stability. Good, but preferably 5 cm to 50 cm.

The woven or knitted fabric using the acetate-processed yarn of the present invention is:
The mixing ratio, the woven structure and the knitted structure may be determined within a range where the desired texture and product appearance can be obtained, and the woven or knitted fabric composed solely of the acetate processed yarn of the present invention, or the plied yarn of the processed yarn and other fibers Woven or knitted fabric comprising the false-twisted yarn of the present invention as a part of the woven or knitted fabric, to obtain a woven or knitted fabric having an excellent design property and an improved acetate-specific dry feeling and refreshing feeling. Is possible.

[0032]

The present invention will be described below with reference to examples. The evaluation method was as follows.

(Apparent thickness of the middle part, apparent thickness of the multiple winding part, thickness ratio) 1 cm each was sampled at each of the multiple winding part and the middle part by a scanning electron microscope at 10 locations.
The width of the thickest part of each sample was measured, and the average of each was defined as the apparent thickness of the middle part and the multiple winding part, and the ratio of the apparent thickness of the middle part / the apparent thickness of the multiple winding part to the thickness ratio. And

(Average length of middle section, average length of multiple winding sections, length ratio) The length of the middle section and multiple winding sections per 5 m of yarn were measured by an optical microscope, and the average was averaged for each section. Length,
The average ratio of the length in the middle of the road / the average length of the multiple winding portions was defined as the length ratio.

(Dry Heat Shrinkage) A skein of a multifilament yarn was prepared, the skein length (K ₀ ) was measured by applying a load of 0.88 cN / dtex, and after a dry heat treatment at 200 ° C. for 10 minutes, , A skein length (K ₁ ) was measured by applying a load of 0.88 cN / dtex, and calculated by the following equation. Dry heat shrinkage (%) = 100 × (K ₀ −K ₁ ) / K ₀ (Post-processing stability) Evaluation was made by catching a yarn on a guide when forming a woven or knitted fabric, breaking a yarn, and the like.

(Evaluation of Cloth) The obtained acetate-processed yarn was made into a woven or knitted fabric, and texture, such as unevenness, shading, design of surface change, dry feeling, and refreshing feeling, was evaluated by visual observation and handling. The evaluation results were represented by ○: good, Δ: average, and ×: poor.

(Examples 1 to 5, Comparative Examples 1 to 5) Using the apparatus shown in FIG. 3, a multifilament yarn shown in Table 1 was used as yarn A, and yarn d was 33 dtex / 8f and dry heat shrinkage. 30
% Polyester multifilament yarn, the number of false twists: (28720 / D ^1/2 ) T / m [where D is the total fineness (dtex) of the yarn A], the false twist direction: Z, the first heater temperature : 140 ° C, temperature of the second heater: 230 ° C,
Magnet tensor tension (tensor exit side): 15g,
Overfeed ratio of yarn B to false twisting area: 100
%, The speed of the first take-off roller: 60 m / min, and the overfeed ratio between the first take-up roller and the second take-up roller: 15%. Table 1 shows the evaluation results of the obtained processed yarn.

[0038] In Examples 1 to 5, a multiply-wound portion in which the yarn B was triple-wound on the surface of the yarn A, and a wall-twisted shape in which the yarn A was wound around the yarn B were exhibited. An acetate processed yarn in which the middle part was formed alternately was obtained. Table 1 shows the ratio of the apparent thickness of the processed yarn to the middle part and the apparent thickness of the multiple winding part, and the ratio of the average length of the middle part to the average length of the multiple winding part. . When a woven or knitted fabric was formed using these acetate-processed yarns, none of the yarns had any problems such as yarn breakage and the collapse of the shape of the multiple wound portions, and a product rich in design, dry feeling, and refreshing feeling was obtained.

In Comparative Example 1, the apparent yarn thickness in the middle of the road was less than 1.5 times the apparent yarn thickness in the multiple winding portion, the rising of the acetate multifilament yarn in the middle of the road was small, and the surface of the multiple winding portion was small. , The texture of the polyester multifilament yarn was strong, and it was difficult to obtain a dry feeling and a cool feeling peculiar to acetate.

In Comparative Example 2, the apparent thickness of the middle part of the road was larger than four times the apparent thickness of the multiple winding part, the acetate multifilament yarn in the middle part was large, and the texture unique to acetate was used. Was obtained, but when it was made into a fabric, it had a so-called fluffy texture and the quality of the fabric was inferior.

In Comparative Example 3, the average length of the middle portion was less than 1.5 times the average length of the multiple winding portions, the length ratio of the multiple winding portions was increased, and the texture of the polyester multifilament yarn was reduced. It became strong and could not obtain the characteristic texture of acetate.

[0042] In Comparative Example 4, the average length of the middle portion was larger than eight times the average length of the multiple winding portions. Sometimes it was a problem.

In Comparative Example 5, since the yarn A was composed only of the polyester multifilament yarn, the texture unique to the intended acetate could not be obtained.

[0044]

[Table 1] (Examples 6 to 9 and Comparative Examples 6 to 9) Triacetate multifilament yarn and polyester multifilament yarn shown in Table 2 as yarn A, 33 dtex / 8f for yarn B, and dry heat shrinkage using the apparatus shown in FIG. Using a polyester multifilament yarn having a rate of 30%, the number of false twists: (28720 /
D ^1/2 ) T / m [where D is the total fineness of the yarn A (dt)
ex)], false twist direction: Z, first heater temperature: 140
° C, the temperature of the second heater: 230 ° C, the tension of the magnet tensor (the exit side of the tensor): 15 g, the overfeed ratio of the yarn B to the false twisting and twisting area: 100%, the speed of the first take-off roller: 60 m / Then, the false twisting was performed under the condition that the overfeed ratio between the first take-up roller and the second take-up roller was 15%. Table 2 shows the evaluation results of the obtained processed yarn.

In Examples 6 to 9, the multiply-wound portion in which the yarn B was triple wound on the surface of the yarn A and the middle portion where the yarn A was wound around the yarn B were alternately formed. A finished acetate-processed yarn was obtained. Table 2 shows the ratio of the apparent thickness of the processed yarn in the middle of the road to the apparent thickness of the multiple winding portion, and the ratio of the average length of the middle portion to the average length of the multiple winding portion. . When a woven or knitted fabric was formed using these acetate-processed yarns, none of the yarns had any problems such as yarn breakage and the collapse of the shape of the multiple wound portions, and a product rich in design, dry feeling, and refreshing feeling was obtained.

In Comparative Example 6, the apparent thickness of the middle part of the road was less than 1.5 times the apparent thickness of the multiple winding part, the rise of the acetate multifilament yarn in the middle part was small, and the surface of the multiple winding part was small. The texture of the polyester multi-filament yarn placed in the area became strong, and it was difficult to obtain a dry feeling and a cool feeling peculiar to acetate.

In Comparative Example 7, the apparent thickness of the middle part of the road was larger than four times the apparent thickness of the multi-winding part, the acetate multifilament yarn in the middle part was large, and the texture unique to acetate was large. Was obtained, but when it was made into a fabric, it had a so-called fluffy texture and the quality of the fabric was inferior.

In Comparative Example 8, the average length of the middle portion was less than 1.5 times the average length of the multiple winding portions, the length ratio of the multiple winding portions was increased, and the texture of the polyester multifilament yarn was reduced. It became strong and could not obtain the characteristic texture of acetate.

[0049] In Comparative Example 9, the average length of the middle portion was larger than eight times the average length of the multiple winding portions, the wall twist shape was likely to collapse, and the yarn form stability was poor. Sometimes it was a problem.

[0050]

[Table 2] (Examples 10 to 15 and Comparative Examples 10 to 15) Using the apparatus shown in FIG. 3, 110 dtex / 26f triacetate multifilament yarn and 220 dtex / 34f acetate multifilament yarn for yarn A, and 33 dtex for yarn B
/ 8f, a polyester multifilament yarn having a dry heat shrinkage of 30%, the number of false twists: 2600 T / m, the false twist direction: Z, the tension of the magnet tensor (tensor exit side) 1
5 g, distance between guide and yarn A: 15 cm, overfeed ratio of yarn B to false twisting area: 90%, speed of first take-up roller: 80 m / min, first take-up roller
Overfeed ratio between the second pickup rollers: 15%
Under the conditions, the temperature of the first heater, the temperature of the second heater,
False twisting was performed by changing the overfeed rate in the second heater as shown in Table 3. Table 3 shows the evaluation results of the obtained processed yarn.

In Examples 10 to 15, a multiply-wound portion in which the yarn B was triple wound on the surface of the yarn A, and a middle portion in which the core yarn was wound around the sheath yarn were alternately formed. The obtained acetate-processed yarn was obtained. When a woven or knitted fabric was formed using these acetate-processed yarns, a good yarn having no problems such as yarn breakage and deformation of the multiple wound portions was obtained, and excellent design, dryness, and coolness were obtained.

[0052] In Comparative Examples 10, 13 and 15, processing stability was poor, and practical production was difficult.

In Comparative Example 11, since the first heater temperature (false twist temperature) was high, the feeling of dryness and coolness was poor due to the influence of heating on the acetate multifilament yarn, and the texture unique to acetate was weakened.

In Comparative Example 12, since the second heater temperature was low, the shrinkage of the yarn B in the middle of the road was small, the protrusion of the acetate multifilament yarn on the yarn surface was reduced, and the dryness and refreshing feeling were poor. That was enough.

[0055] In Comparative Example 14, since the overfeed rate in the second heater was less than 8%, the yarn B in the middle of the road could not be sufficiently shrunk, and the acetate multifilament yarn was raised on the yarn surface. The acetate texture was not obtained.

[0056]

[Table 3]

[0057]

According to the present invention, there are provided a multi-winding portion in which the yarn B is triple wound around the yarn A, and a wall-twisted shape in which the yarn A is single wound around the yarn B. Is a processed yarn formed alternately on the way, and the yarn A includes an acetate multifilament yarn.

The apparent thickness of the middle part is 1.5 to 4 times the apparent thickness of the multiple winding part, and the average length of the middle part is one of the average length of the multiple winding part. .5 to 8 times, the thread part in contact with the skin is mainly composed of acetate multifilament yarn located in the sheath in the middle of the road. An acetate-processed yarn with an enhanced feel and coolness can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing an example of a yarn form in a multiple winding portion of an acetate processed yarn according to the present invention.

FIG. 2 is a view showing an example of a yarn form in a middle part of an acetate processed yarn according to the present invention.

FIG. 3 is an example of a method for producing an acetate processed yarn of the present invention.

[Explanation of symbols]

 Reference Signs List 1 yarn including acetate multifilament yarn 2 magnet tensor 3 yarn B 4 supply roller 5 guide 6 first heater 7 false twisting unit 8 first take-up roller 9 second take-up roller 10 second heater 11 take-up machine 12 guide distance

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L036 MA04 MA24 MA33 MA39 PA05 PA10 PA21 PA46 RA03 RA25 UA01 UA21 UA30

Claims (11)

[Claims] 1. A multiply-wound portion in which a yarn B is triple wound around a yarn A, and a wall-twisted road in which the yarn A is single wound around the yarn B. The middle portion is a processed yarn formed alternately, and the yarn A includes an acetate multifilament yarn, and the apparent thickness of the middle portion is 1.5 to 4 times the apparent thickness of the multiple winding portion, In addition, an acetate-processed yarn in which the average length of the middle portion is 1.5 to 8 times the average length of the multiple winding portion. 2. The total fineness of the acetate multifilament yarn constituting the yarn A is 167 dtex or more and 115 or more.
The acetate-processed yarn according to claim 1, which has a dtex of 0 dtex or less. 3. The acetate-processed yarn according to claim 1, wherein the yarn A is composed of two or more acetate multifilament yarns. 4. The acetate-processed yarn according to claim 1, wherein the yarn A is two or more yarns composed of an acetate multifilament yarn and a thermoplastic multifilament yarn other than the acetate multifilament yarn. . 5. The fineness ratio D1 / D2 of the fineness D1 of the acetate multifilament yarn constituting the yarn A and the fineness D2 of the multifilament yarn constituting the yarn B is 2 to 15. Acetate-processed yarn described in Crab. 6. The acetate-processed yarn according to claim 1, wherein the yarn B is a thermoplastic multifilament yarn. 7. The acetate-processed yarn according to claim 1, wherein the acetate multifilament yarn constituting the yarn A includes an acetate multifilament yarn having a specific gravity of 1.35 or more. 8. The acetate processed yarn according to claim 1, wherein the acetate multifilament yarn constituting the yarn A includes an acetate multifilament yarn dyeable with a cationic dye. 9. A yarn B is over-fed to a twisted area of the yarn A via a guide at a fixed distance from the yarn A,
In the false twisting process of traverse winding around the yarn A, the yarn A includes an acetate multifilament yarn,
A method for producing an acetate-processed yarn which is processed under conditions satisfying the following expressions (1), (2) and (3). 100 ≦ HT1 ≦ 160 (1) 200 ≦ HT2 ≦ 250 (2) 8 ≦ OF2 ≦ 25 (3) where HT1 is the first heater temperature (° C.) of the false twister,
HT2 is the second heater temperature (° C.) of the false twister, and OF2 is the overfeed rate (%) in the second heater. 10. The method for producing an acetate processed yarn according to claim 9, wherein the yarn A is at least two yarns composed of an acetate multifilament yarn and a thermoplastic multifilament yarn other than the acetate multifilament yarn. 11. The method for producing an acetate-processed yarn according to claim 9, wherein the yarn B is a thermoplastic multifilament yarn having a dry heat shrinkage of 12% or more.