JPH02229235A - Conjugate bulky finished yarn and production thereof - Google Patents

Abstract

PURPOSE:To produce the subject finished yarn giving a fabric free from splashed pattern, without deteriorating the spun-like feeling, by carrying out fluid interlocking treatment of a yarn having double-layer structure under a specific condition. CONSTITUTION:Undrawn polyester multifilament yarns A, B dyeable with ionic dye and having elongation of >=60% and maximum elongation difference of 80-250% between the yarns are subjected to the simultaneous drawing and false-twisting processing in aligned state at a draw ratio of >=1.2 and imparted with >=50 interlocks per 1m with a fluid interlocking nozzle 9 having propelling force in the running direction of the yarn. A processed yarn having maximum yarn length difference of 13-25% and having alternately formed collected parts and opened parts is produced by this process. The collected part is the interlocked part having twisted yarn-like wound part. A part of each multifilament yarn is mixed and interlocked with each other at the boundary part to prevent the formation of nep of the sheath yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Technical Field) The present invention relates to a composite bulky textured yarn with rich bulky properties and a spun-like texture, and a method for producing the same, and more specifically, to a composite yarn having a core-sheath structure. The processed yarn is subjected to interlacing treatment,
Featuring a fluffy, spun yarn-like appearance and feel. Swelling. To provide a composite bulky textured yarn which has sweat absorption properties, is capable of dyeing extremely dark colors vividly, has excellent bulky properties, and does not cause scuff spots, and a method for producing the same.

(Conventional technology) Conventionally, as a composite processed yarn with a spun-like texture,
Processed yarn with a core-sheath structure in which a sheath yarn is wound around a core yarn (hereinafter referred to as
However, when such composite textured yarns are pulled or squeezed, the sheath yarns very easily slip and a nep-like yarn pool is generated, or the core yarns are The threads and sheath yarns sometimes separated, making them difficult to handle during the knitting and weaving process, resulting in poor quality and texture of the knitted fabrics.

For this reason, in Japanese Patent Publication No. 59-21970, in order to obtain a composite textured yarn that is stable against external forces such as bowing and ironing, the above two-layer structured yarn is disclosed in Japanese Patent Publication No. 35-1873, etc. It has been proposed that an interlacing nozzle be used to perform an interlacing treatment to entangle a portion of the core yarn and sheath yarn.

It is true that in the composite processed yarn obtained in this way, the core yarn and sheath yarn are partially entangled, so that the sheath yarn does not easily slip due to external force, but the degree of entanglement is However, slippage of the sheath yarn may still occur.

On the other hand, it is also known to produce a two-layered yarn in which two undrawn yarns having different elongations are intertwined and then subjected to simultaneous stretching and false twisting (for example, Japanese Patent Publication No. 18457/1983). In this manufacturing method, undrawn yarns with different elongations are pre-entangled (i.e., the filaments are sufficiently intertwined and then subjected to drawing and simultaneous false twisting), so the resulting two-layer structure In the yarn, at the interface between the core yarn and the sheath yarn, the filaments that mainly constitute the core yarn and the filaments that mainly constitute the sheath yarn are sufficiently intertwined to prevent the sheath yarn from slipping due to external forces, etc. Can be done.

In the two-layer structure yarn obtained by these methods,
In general, wound yarn is wound around the core yarn in an alternately twisted manner, so the twisted yarn structure has the characteristic that it can improve the slimy and fluffy feel that are the drawbacks of ordinary woolly processed yarn fabrics. . However, such composite textured yarns sometimes exhibit a dull feel similar to fusion yarns, and in that sense, they have a drawback of being somewhat lacking in bulkiness.

Furthermore, the conventional spun-like two-layer structure yarn is
-1332 Publication》Spun yarn-like appearance and feel. In addition to swelling and sweat absorbing properties, there is a difference in elongation, or orientation, between the filament yarns that make up the core and the filament yarn that makes up the sheath, so when dyed, it becomes smudge-like. become. This smudged state itself is desirable because it gives the product a unique appearance, but when manufacturing this Suban-like two-layer structured yarn, two types of filament yarns with different elongations are mixed together. Since the material is subjected to the simultaneous stretching, false twisting and crimp processing in an entangled state, it is likely that spots in the form of scraping will occur due to the entangling process.

In addition, for this reason, as a Suban-like processed yarn without scratches,
Japanese Unexamined Patent Publication No. 62-6925 is known. The Suban-like processing system disclosed in this publication is for Rikiichi sheet,
It is used for general interior decoration, but in this case, two types of undrawn yarns with a very large difference in elongation are intertwined and then subjected to false twist heat treatment, so the yarn on the high elongation side becomes a sheath yarn and is semi-melted. It has the disadvantage that it restricts the core yarn on the low elongation side in the appetizer state, resulting in poor bulkiness.

(Objective of the Invention) As described above, the object of the present invention is to improve the silkiness of the conventional alternately twisted two-layer structure yarn, which is similar to that of fused yarn, and to prevent the occurrence of stress abrasion spots. The object of the present invention is to provide a composite bulky textured yarn that can be dyed in different colors, can prevent the sheath yarn from slipping, and can exhibit excellent bulky properties, and a method for producing the same.

(Structure) As a result of studies to achieve the above object, the present inventors found that in the conventional two-layer structure yarn in which the core yarn is bound by the wrapped yarn, there are two types of unstretched yarn with different elongation. After the yarns are aligned and intertwined, they are false-twisted and heat set, so the high-elongation yarns become sheath yarns and restrain the low-elongation core yarns in a semi-fused state. As a countermeasure to this problem, after drawing and false twisting, a fluid treatment nozzle with propulsion force in the yarn running direction is used to optimize the yarn foot difference, increase the draw ratio during processing, and further reduce the amount of fluid treatment during fluid treatment. Yarn collision caused by high pressure fluid. It has been discovered that, in combination with fiber opening and entanglement treatment, a processed yarn that has high bulkiness and can be dyed in a deep color without impairing the silky texture has been obtained, and the present invention has been achieved.

That is, the first aspect of the present invention is a composite bulky textured yarn consisting of a false-twisted crimped multifilament yarn that mainly constitutes a core portion and a false-twisted crimped multifilament yarn that mainly constitutes a sheath portion, A bundled part and an open weave part are alternately formed in the longitudinal direction, and the bundled part is an intertwined part with a twisted thread-like winding part, and a part of each multifilament yarn is mixed and crossed with each other at the boundary part. All of the multifilament yarns are made of polyester dyeable with ionic dyes, and the unit length of the composite processed yarn mainly constitutes the sheath portion. A polyester composite bulky textured yarn characterized in that the multifilament yarn is longer than the multifilament yarn mainly constituting the core, and the maximum yarn length difference is 13 to 25%, and the second aspect of the present invention The invention provides a method in which at least two types of undrawn multifilament yarns having different elongations are aligned and drawn and false-twisted to produce a composite bulky textured yarn, and all of the undrawn multifilament yarns contain an ionic dye. The undrawn multifilament yarn is made of polyester that can be dyed, and the elongation of each undrawn multifilament yarn is 60% or more, and the maximum elongation difference between the yarns is 80 to 250%. . Polyester composite bulk processing characterized in that after double stretching and simultaneous false twisting processing, entanglement with a degree of entanglement of 50 strands/m or more is imparted using a fluid entangling nozzle having a propulsive force in the yarn running direction. This is a method of manufacturing thread.

In the present invention, "polyester multifilament dyeable with ionic dyes" refers to polyesters containing groups dyeable with ionic dyes (for example, sulfonate groups) in the molecule or polyesters dyeable with ionic dyes. A multifilament made of polyester blended with polymers (e.g. nylon 6, nylon 66, etc.) and additives,
A general term for items that are well dyed with ionic dyes.

As the polyester dyeable with such ionic dyes, copolymerized polyethylene terephthalate containing about 0.5 to 10 mol % of sodium isophthalic acid-5-monosulfonate as an acid component is particularly suitable.

The polyester composite bulky textured yarn of the first invention of the present invention is
As mentioned above, it is composed of a false-twisted crimped multifilament yarn which mainly constitutes a core part and one or more false-twisted and crimped multifilament yarns which mainly constitute a sheath part, and has a convergent part and an open weave part in the longitudinal direction. are formed alternately, and the bundled part is an intertwined part with a twisted thread-like winding part, and a part of each of the above multifilaments is mixed and intertwined with each other to form an intertwined part, and the bundle part is an intertwined part with a twisted thread-like winding part, and a part of each multifilament is mixed and intertwined with each other to form an intertwined part, retains gender. Furthermore, in terms of the ψ length of the processed yarn of the present invention, the multifilament yarn mainly constituting the sheath is longer than the multifilament yarn mainly constituting the core, and the yarn length difference is 13 to 2.
It is 5%.

As a result, it has a spun-like appearance and feel similar to spun yarn with a fluffy feel, and has an excellent sense of volume, and the sheath yarn does not slip and become napped even when pulled or squeezed. It becomes a composite bulky processed yarn with excellent knitting and weaving properties.

Furthermore, all of the above multifilament yarns are made of polyester dyeable with ionic dyes. If this requirement is not met, it is not only impossible to dye very deep and vivid colors, but also it is impossible to overcome the drawback that staining occurs when dyeing.

Next, a second invention, which is a method for industrially manufacturing the above-mentioned bulky processed polyester composite yarn according to the first invention, will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a fluid treatment nozzle used for entangling two-layered yarns in the present invention, and FIG. 2 is a schematic diagram showing an embodiment of the present invention.

In FIG. 1, reference numeral 91 indicates a thread guide hole 92 and two opposing fluid injection holes 93 that open into the thread guide hole 92. 94 is the nozzle body. Each yarn guide hole 92 has a yarn inlet 92a and a yarn outlet 92b formed in a tapered shape, and two fluid injection holes 93 in the middle thereof. Each of the nozzle holes 94 is opened so that the angle θ formed by the thread guide hole 92 is 40 to 60''. 96 is formed in a pressurized fluid supply chamber (pressure equalization chamber) 97. 98 is a pressurized fluid introduction hole. The yarn outlet 92b of the yarn guide hole 92 is formed in a trumpet shape. A colliding body 99 is disposed close to the front surface of the colliding body so as to block the yarn outlet 92b.This colliding body 99 has a distance between it and the yarn outlet 92b of 1 to 3 MIII, as will be described later. Reference numeral 90 denotes a yarn guiding guide provided in front of the yarn entrance 92a.

In such a fluid treatment nozzle for yarn, the yarn guiding guide 9
The yarn Y guided in an overfeed manner to the yarn inlet 92a through the two fluid injection holes 93. The (pressure) air ejected from the filaments 94 is drawn in and the constituent filaments are entangled with each other. Here, the yarn Y supplied from the yarn inlet 92a is directly hit by the jetted air and is disturbed. The yarn is separated and guided to the yarn outlet 92b, and the disturbance of the yarn that occurs during this time.
As described above, the phenomena of fiber mixing, fiber pulling, and tension (frictional force is generated between yarn groups running along the yarn guide) occur at the injection hole 93. The image is enlarged and emphasized by regulating the angle of 94. In this case, fluid injection holes 93 and 94
It is preferable that the angle between the two ends is 70 to 110'. Further, the ratio 02/DI of the diameter D1 of the opening of the fluid injection hole 93 (94) and the diameter D2 of the thread guide hole 92 of the corresponding thread is 1 to 2.
It is preferable that the amount is within this range, and by setting the amount within this range, the ability to draw the yarn into the nozzle and the entangling ability of the constituent filament gates can be improved very well and stably. Collider 9
Reference numeral 9 increases the turbulent flow effect of the thread guiding hole 92, and has the effect of making the threads roll and entangle well, thereby making the intertwining of the threads denser.

The collision body 99 has a gap of 1 to 3 inches with respect to the yarn outlet 92b.
It is preferable to set it to M, and if it is less than 1 am, the yarn will become clogged.
Processing yarn breakage is likely to occur, and if it is larger than 3M, entanglement becomes non-uniform and the stability of processing tends to decrease.

In the present invention, such a fluid treatment nozzle is used to perform an entangling treatment on a two-layered yarn.

For this double-layered yarn, a sheath yarn is continuously supplied between the false twisting start point of the core yarn and a heater to utilize the rotating torque of the core yarn, which is being false-twisted. Composite textured yarn obtained by winding it continuously around a core yarn (for example, Japanese Patent Publication No. 45-28018), or two or more undrawn yarns with different elongation are drawn together and then stretched and simultaneously subjected to false twisting. Composite processed yarn obtained by
No. 970), particularly a composite textured yarn obtained by the method shown in FIG.

In FIG. 2, undrawn polyester yarns (A) and ff-
．． - (B) is pulled together by the guide (3), fed to the stretch false twisting zone from the feed roller (5) via the tensor (4), and simultaneously stretched and twisted by the force of the false twister (retrospectively). The twist is heat set with a heater (6). Then, the yarn exiting the false twister (71) is untwisted to become a two-layer yarn with a core yarn and a sheath yarn wound around it.

At this time, the elongation is 60% or more and the elongation difference is 80 to 250%.
(preferably 100 to 230%), it is preferable to align at least two types of undrawn polyester yarns and then subject them to simultaneous stretching and false twisting at a draw ratio of 1.2 or more (preferably 1.3 to 2).

Here, in undrawn yarns with an elongation of less than 60%, yarn breakage tends to occur frequently during simultaneous stretching and false twisting at a draw ratio of 1.2 times or more, and undrawn yarns with an elongation difference of less than 80% In the case of yarn, there is a tendency that the winding of the sheath yarn around the core yarn decreases, making it difficult to obtain a good two-layer structure yarn.

On the other hand, undrawn yarns with an elongation difference of more than 250% tend to produce neps when the resulting composite textured yarns are subjected to a weaving process.

As a combination of such undrawn polyester yarns, undrawn yarns with low elongation are partially oriented undrawn yarns with an elongation of 80% or more and a draw ratio of 1.3 times or more, and undrawn yarns with high elongation are used as partially oriented undrawn yarns with an elongation of 80% or more and a draw ratio of 1.3 times or more. It is preferable to use an undrawn yarn of 250% or more.

Furthermore, when the stretching and simultaneous false twisting process is performed at a stretching ratio of less than 1.2, there is a tendency that a good two-layer structured yarn cannot be obtained.

In the two-layer structured yarn obtained in this way, it is preferable that the denier of each yarn is core yarn≦sheath yarn, and in particular, the total denier of the core yarn is 50 to 300 de, and the total denier of the sheath yarn is 75 to 350 + je. It is preferable.

Furthermore, the tension during false twisting is the twisting tension during processing (T1).
and the untwisting tension (T2) is 0.5≦T2/TI≦
It is preferable to set it within the range of 0.9. T2/T
If I exceeds 0.9, the untwisting force will be too large and the yarn will come apart, resulting in poor volume and uneven dyeing when fabricated.
It tends to make things worse.

On the other hand, if 72/TI is less than 0.5, the yarn becomes hard and tends to deteriorate the texture and processability when made into a woven fabric. Although the machining speed can be arbitrarily selected, machining can be stably performed even at a high speed of 3001 rLZ or more.

As the false twisting tool (7) used in such a false twisting process, a three-axis multi-stage disc type circumscribed false twisting tool is suitable, which can provide the effect of simultaneously false twisting the yarn and feeding it out. Also,
In the method of the present invention, a napping treatment may be performed as appropriate.

As a filament cutting and raising tool, for example,
Rotating or fixed rough surface bodies or cutting blades shown in Japanese Patent Publication No. 19743, Japanese Patent Publication No. 49-38379, Japanese Patent Publication No. 48-7891, Japanese Patent Publication No. 4G-31942, etc. are advantageously used. Such a cutting and raising tool is usually preferably provided in a cooling zone between the heater outlet end of the false twisting and crimp machine and the false twisting tool.

Of course, according to the invention, l;171! Not only the case where the Fi raising tool and the false twisting tool are provided individually, but also the false twisting tool 10 having a cutting and raising ability as shown in the figure can be suitably employed. A specific example of such a false twisting device is to arrange three or more shafts each equipped with a plurality of disc friction members so that the discs of each shaft partially overlap and intersect with each other, and are positioned along a spiral. A twisting friction body that applies only false twist to the yarn using a plurality of disk friction bodies, and a raised w that gives fluff to the yarn.
One example is one composed of m-bodies.

The unit length of processed yarn obtained in this way is as follows:
As mentioned above, the length of the thread forming the sheath is longer than the length of the thread of the core, and the difference in thread length is 13 to 25% (preferably 1
5 to 20%) is important.

In addition, in the present invention, the old "Itotashi difference" refers to the
It was measured by the method disclosed in Japanese Patent No. 18457. Here, processed yarns with a yarn length difference of less than 13% lack a smooth feel, and conversely, processed yarns with a yarn length difference of more than 25% exhibit a loose feel similar to @yarn, and lack bulkiness. When subjected to a weaving process, neps tend to occur.

It is important to note here that due to the expansion, contraction and repetition of the core thread of processed yarn, the core thread and the sheath yarn may separate, which may cause a practical problem. It is necessary to provide interlacing between the threads to stabilize the thread structure.

From a practical standpoint, the number of entanglements needs to be 50/7 FL or more.

The two-layered yarn having a core-sheath structure thus obtained is subjected to an entangling treatment using a fluid nozzle shown in FIG.

As shown in FIG. 2, the cage entanglement process is performed by spraying compressed fluid from the fluid treatment nozzle (9) shown in FIG. From there, it passes through the second delivery roller (g) and is rolled onto the package surface.

The compressed fluid at this time is preferably air having a pressure of 3 Kt/ai or more, and is preferably blown at a rate of 110 N N /min or more.

It is preferable that such intertwining treatment is performed so that the degree of intertwining of the yarns is 50 to 80 threads/m. If the degree of entanglement is less than 50 strands/m, separation between the core yarn and the wrapped yarn tends to occur in the processed yarn, while if the degree of entanglement exceeds 80 strands/m, the physical properties of the yarn will suddenly deteriorate. There is a tendency to decrease.

The "degree of confounding" mentioned here is defined in U.S. Patent No. 2,985.
, No. 991 and No. 3,110.15j.

Moreover, the "composite processed yarn" as used in the present invention refers to I! made of a thermoplastic polymer. It is a composite processed yarn composed of fibers,
Polyethylene terephthalate is preferred as the thermoplastic polymer.

(Function) According to the present invention, the two-layered yarn, which is composed of all the yarns dyeable with ionic dyes and has a core-sheath structure, is drawn in by the air ejected from the fluid injection holes 93 and 94, and the yarn is drawn in between the constituent filaments. Disturbance, fiber splitting, lag (slippage), mixing, and tension are induced in the yarns to impart entanglement and bulkiness to the yarns, and furthermore, the yarns are rolled by the colliding body 99 to make the yarns intertwine more precisely. can do.

For this reason, the resulting composite processed yarn has a yarn foot difference of 13 to 25%.
Since the core yarn and sheath yarn are sufficiently intertwined within the range of , the yarn exhibits not only excellent bulky properties but also a very deep color dyeing effect.

(Effects of the Invention) The composite bulky processed yarn obtained by the present invention can be used for clothing, mainly for outer garments, and for curtains. It can be preferably used for interior purposes such as car seats.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples-1 to 3 Partially oriented yarns made of polyethylene terephthalate copolymer copolymerized with 2.6 mol % of 5-sodium sulfoisophthalic acid and having an intrinsic viscosity of 0.50 (measured with a phenol solution at 25°C) 220de /30fil
s) <A) and an undrawn yarn made of the same polyethylene terephthalate copolymer (220de/72fi
ls) and (B) were aligned and subjected to stretching and false twisting processing and entangling processing using the apparatus shown in Fig. 2.

That is, these yarns (Δ>.(B)) were aligned, subjected to simultaneous stretching and friction false twisting by the method shown in FIG. 2, and then entangled using the fluid treatment nozzle shown in FIG.

At this time, the stretching ratio was 1.75 times, and the actual number of false twists was 2S50.
T/m, the temperature of the heater (6) was 160° C., and the speed of the second delivery roller (8) was 320 m/min. In addition, as a false twisting tool, a 3-axis multi-stage circumscribed friction false twisting tool equipped with a friction disk whose tangent surface is ceramic was used, and Tz/T+ was 44g/
It was adjusted to be 579 - 0.77.

Furthermore, the specifications and air pressure of the fluid treatment nozzle used are as shown below.

Angle between the fluid injection hole and the thread guide hole: 45° Diameter of the fluid injection hole (D+): 1.4ttttx Diameter of the thread guide hole (D
z): 2.2 shoes D2/DI; 1.57 pressure air pressure
;5. OKy/aiG Table 1 shows the physical properties of the composite bulky textured yarn thus obtained.

In addition, when this processed yarn is observed under a microscope, it can be seen that there are converging parts and various I
A spun yarn in which interlaced filaments (50 pieces/M) are formed in which filaments are intertwined with each other between the yarn forming the core portion and the yarn forming the outer layer portion in the convergence portion. appearance. It had a tactile feel, swelling, and sweat absorption properties. Further, when this yarn was used, there were no problems such as generation of neps during the weaving process, and the fabric obtained also had spun-like bends.

Furthermore, when this fabric was dyed under the following conditions and the state of the scum f was judged with the naked eye, it was found that the scum condition was uniform, no scum spots were observed, and it was dyed in a very dark color.

Dyeing conditions Cationic dye 3evron Blue 5 G 2
%owf ice acetic acid 2%OWI' sodium acetate 1%owr Next, when this composite bulky textured yarn was woven using the weft yarn, as shown in Table 1, it exhibited excellent bulkiness and texture and a good texture. A fabric with good appearance was obtained.

In addition, the fabrics woven using Honharō's composite bulky yarn are free from scratches and can be dyed in extremely deep colors.

Here, the bulkiness is a value measured as follows.

Bulky yarn sample 1 8 0 with a reel of frame circumference 90α
cm was wound into a wind shape and heated at 180℃ under a load of 6g for 5 minutes.
After dry heat treatment for a minute, the bulky textured yarn is loosened to remove entanglements caused by shrinkage between the yarns, and then the sample is inserted into the groove 1 of the measuring device shown in the figure, a 6g flat weight 2 is placed on it, and the scale 3 is set. Read and measure the volume of the sample V (+ul). The length of the groove 1 of the measuring device is 101, and the width is 1.
1. The bottom radius is 0.5, and the length of the flat weight 2 is 12.
1"ll1 width is 0.9 Cut.

Next, both ends of the sample were cut off to match the sides of the sample, and the sample weight MW (g) after being cut off was measured.
V/W (cd/g>) is defined as bulky.

90°, no colliding body 99, straight D2 (Comparative Example-3), degree of entanglement less than 50 wires/m (Comparative Example-6), yarn foot difference 25% (Comparative Example-4), less than 13% (Comparative Example-5)
The results are shown in Table 1.

Comparative Examples-1 to 6 In the examples, [A] yarn had an intrinsic viscosity [η] = 0.64
Comparative example using polyethylene terephthalate
1), A fluid entangling nozzle was provided before the simultaneous stretching and false twisting process - Comparative Example-2), As a fluid nozzle, the angle between the fluid injection hole and the yarn guiding hole was compared to Comparative Example-7, with an intrinsic viscosity of 0.65 ( A polyethylene terephthalate yarn (measured with a phenol solution at 25°C) with an elongation of 180% (225 de /30 fil
s) and the same polyethylene terephthalate at a spinning speed of 1
A polyester filament yarn with an elongation of 320% obtained by spinning at 300 m/min (<220 de /72 fits) was drawn together and stretched and false-twisted under the same conditions as in the example except that the heater temperature was 200 ° C. A spun yarn-like two-layer fluffy yarn was obtained, but when the fabric woven from this yarn was dyed with the following dye, many scuff spots were observed.

Dyeing conditions Disperse dye: Eastman Polyeste
r 3 1ueGLF Comparative Example-8 The 5-sodium sulfoisophthalic acid copolyester filament yarn with an elongation of 180% used in Example 1 and the polyethylene terephthalate filament yarn with an elongation of 320% used in Comparative Example 1 were aligned. When the fabric was drawn and false-twisted under the same conditions as in the example, a two-layer fluffy yarn similar to spun yarn was obtained. However, when the fabric made from this yarn was dyed with the following dye, it became marbled and had an extremely large amount of Scratchy spots were observed.

Dyeing conditions Disperse dye: [astaa+an Polyester
31ueGLF Cationic dye: Sevron B Iue 5 G

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a fluid treatment nozzle used in the present invention;
FIG. 2 each shows a schematic diagram showing an embodiment of the present invention. In Fig. 1, 91... nozzle body. 92... Thread guide hole, 93. 9
4...Fluid injection hole, 95...Support block, 99.
...Collision body Figure 2 Figure 1 Gate (Method) June 6, 1999 Figure

Claims (2)

[Claims] (1) In a composite bulky yarn consisting of a false-twisted crimped multifilament yarn that mainly constitutes the core and a false-twisted and crimped multifilament yarn that mainly constitutes the sheath, the bundled portion and the opening are formed in the longitudinal direction. fibers are formed alternately,
The bundled part is an intertwined part with a twisted thread-like winding part, in which a part of each of the multifilament yarns is mixed and intertwined with each other at the boundary part to form an intertwined part, and each of the multifilament yarns is are all made of polyester dyeable with ionic dyes, and in the unit length of the composite processed yarn, the multifilament yarn that mainly constitutes the sheath is:
A polyester composite bulky processed yarn that is longer than the multifilament yarn that mainly constitutes the core and has a maximum yarn length difference of 13 to 25%. (2) When at least two types of undrawn multifilament yarns with different elongations are aligned and stretched and false-twisted to produce a composite bulky textured yarn, all of the undrawn multifilament yarns are dyed with ionic dyes. An undrawn multifilament yarn made of dyeable polyester, in which the elongation of each undrawn multifilament yarn is 60% or more, and the maximum elongation difference between the yarns is 80 to 250%, is drawn at a stretching ratio of 1. . Polyester composite bulk processing characterized in that after double stretching and simultaneous false twisting processing, entanglement with a degree of entanglement of 50 pieces/m or more is imparted using a fluid entangling nozzle having a propulsive force in the yarn running direction. How to make yarn.