JPS60259615A - Multifilament having potential bulkiness and its preparation - Google Patents

Abstract

PURPOSE:Multifilament having potential bulkiness providing woven and knitted goods having a feedling like spun yarn, having a specific crosssectional shape resemble to an approximately cocoon type, comprising an eccentric hollow. CONSTITUTION:In extruding a polymer in a molten state by using a spinning nozzle wherein a pair of the extrusion holes 1 and 2 having different sectional areas of extrusion are connected by the slit 3, and the extrusion hole 1 having the larger sectional area of extrusion consists of the plural sits 1a, 1b, and 1e, the extrusion rate from the extrusion hole 1 having the larger sectional area of extrusion is made lower than the extrusion rate of the extrusion hole 2 having the smaller sectional area of extrusion, the extruded flow from the latter is smashed against an extruded flow from the former and bounded. Consequently, eccentric hollow filament wherein its section is in approximately cocoon type, has the constricted part C, both the sides of the constricted part C are in unsymmetrical shape, the thicker side has a hollow part and higher degree of orientation, and the thinner side has unevenness is thickness in the longer direction is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a latent bulky filament and a method for producing the same. The present invention relates to a potentially bulky multi-noiramen 1- consisting of: and a method for producing the same.

(Prior Art) Potentially bulky multifilaments that can exhibit bulkiness by heat treatment can be obtained by mixing filaments with different shrinkage (for example, as disclosed in U.S. Pat. No. 3,200). , No. 576 specification @).

In the multifilaments 1 to 1, the high-shrinkage filaments shrink during heat treatment, and the low-shrinkage filaments protrude as a result, giving them bulkiness.

At this time, if the high shrinkage filament is made with a thick denier and the low shrinkage filament is made with a fine denier, heat treatment 1!
! ! The texture of the later bulky multifilament has a firmness and a soft touch.

By the way, in order to obtain a multifilament made of filaments having such a shrinkage difference, a method is often adopted in which a plurality of yarns that have been given a shrinkage difference are mixed together.
3. For example, the following method is proposed in Japanese Unexamined Patent Publication No. 54-82423 (US Pat. No. 4,153,660).

That is, in method C, the spun yarn obtained by rapidly cooling the polymer stream discharged from the same spun yarn is divided into two yarn bundles, and one of the yarn bundles contains mainly water. A spinning finishing agent is applied to the other yarn bundle, and an agent with a boiling point higher than that of water is applied to the other yarn bundle, and then both yarn bundles are separately heat-treated under the same conditions and drawn. After that, 1lPIli is performed.

This method uses the boiling point difference between the spinning finishing agents to impart a shrinkage difference between the yarn bundles, but it requires extremely complicated operations such as applying two types of spinning finishing agents. It is necessary to apply

In addition, if a denier difference is created between the filaments constituting the yarn in the spun 1" yarn spun out from the same spinneret, the filaments may stick together due to yarn sway, or yarn breakage may occur. 1 - Rubble is likely to occur, and it is necessary to strictly control spinning conditions such as draft rate and amount of cold fiIII.

On the other hand, a method for producing latent bulky multifilaments without such complicated operations was disclosed in Japanese Patent Laid-Open No. 54-
No. 42415 and Japanese Patent Application Laid-open No. 55-51809 (
U.S. Patent No. 4,332,757 and U.S. Patent No. 4,3
49.604).

This method involves passing two spindles through a pair of angularly opposed discharge holes arranged in a single spinneret and having different discharge cross-sectional areas.
Directly below the mouth surface, the low-speed polymer flow discharged from the discharge hole with a large discharge cross-sectional area of the pair of discharge holes is connected to the low-speed polymer flow discharged from the discharge hole with a small discharge cross-sectional area. The discharged high-speed polymer flow is collided and vibrated to join together, and then it is rapidly cooled and wound up, resulting in a multifilament (hereinafter referred to as pulsing
The filament (sometimes referred to as a filament) is composed of a filament having a shrinkage difference in the cross-sectional direction and the longitudinal direction.

However, such potentially bulky multifilaments are generally heat-treated after being made into woven or knitted fabrics, but the pulsing 17-n is said to lack bulkiness in woven or knitted fabrics, especially woven fabrics. It has its drawbacks.

That is, since the binding force exerted on the weave structure of the fabric is strong and the shrinkage force of the pulsing yarn is low, the shrinkage of the pulsing yarn is restricted and the bulkiness is insufficient.

In addition, such pulsing yarns have the disadvantage that the shrinkage difference disappears when further stretching is performed after spinning, so even those with extremely high shrinkage ratios must be used without being stretched. . For this reason, in woven and knitted fabrics using pulsing yarns, wrinkle-like shrinkage spots and dyeing spots may occur, and dyeing and finishing conditions are severely restricted, making it impossible to put them into practical use. .

Therefore, the present inventors conducted various research on latent bulky multifilaments that have an extremely large shrinkage force that does not eliminate the difference in shrinkage even after stretching, and patent application No. 59-5
No. 699 and Japanese Patent Application No. 59-36097.

Such a latent bulky multifilament is composed of eccentric hollow filaments having uneven thickness in the longitudinal direction, and the degree of orientation of the hollow part of the constituent filaments is much higher than the hd orientation of the adjacent solid part. Since it is large, the difference in shrinkage between filaments and within the filaments can be increased, and a multifilament made of such filaments can exhibit sufficient shrinkage force.

The latent bulky multifilament (because the shrinkage difference between and within the filaments does not disappear even if it is stretched), it can be used after being stretched. Using a potentially bulky multifilament with hX7J (I) 1. Woven and knitted fabrics can reduce wrinkle-like shrinkage spots and dyeing spots due to force X compared to those using pulsing A7-J. However, it is still insufficient for practical use, and further improvements are desired.

In addition, the shrinkage spots and dyeing spots occur more frequently in latent bulky multifilaments obtained by drawing heat setting than in latent bulking multifilaments obtained by high-speed spinning without drawing heat setting. There was a tendency to

(Objective of the Invention) The first object of the present invention is to provide a latent bulky multifilament that can be used in woven or knitted fabrics, particularly in woven fabrics, to provide a further improved appearance and spun-like texture, and a method for producing the same. Our goal is to provide the following.

The second object of the present invention is to provide a latent bulky multifilament which can be subjected to drawing heat-letting to impart mechanical properties suitable for practical use, and which can exhibit both a much improved appearance and a spun-like texture. The manufacturing method is to be provided.

A fourth object of the present invention is to provide a multifilament with a high potential for karat, which can have both a firm and soft touch like the multifilament 1-, which is a mixture of filaments of different deniers, and a further improved appearance. The purpose is to provide manufacturing methods4. 1 (MA composition) The inventors of the present invention have studied to achieve this purpose, and
It has been found that high-shrinkage areas and low-shrinkage areas are ubiquitous in the longitudinal direction of multifilaments with latent bulk used in woven and knitted fabrics exhibiting shrinkage spots and dyeing spots.

After further consideration based on this knowledge, the inventors of the tree discovered that
We discovered that by subjecting a latent bulky multifilament to a mixing and entangling process during spinning and pulling it out, a latent bulky multifilament in which high-shrinkage parts and low-shrinkage parts are dispersed without being ubiquitous can be obtained. This invention has been achieved.

That is, the present invention provides a multifilament composed of filaments made of a melt-spun polymer.
The constituent filament is flat, and has a pair of four parts facing each other across the long axis on the outer periphery in the long axis direction, and is asymmetrical with respect to the short axis between the pair of recesses. An eccentric hollow filament having a cross-sectional shape and a thickness unevenness in the longitudinal direction of the filament, the hollow portion being on the side where the straight line parallel to the short axis is maximum at a3 in the cross section of the filament, and the short axis A latent bulky material characterized in that the degree of orientation of the hollow portion existing portion divided by is greater than the degree of orientation of the solid portion adjacent thereto, and the constituent filaments are provided with mixed fiber entanglement. A hollow discharge hole is formed in which a pair of discharge holes having different discharge cross-sections are connected to each other by a sulin 1-, and the discharge hole has a large discharge cross-section. The molten polymer is discharged through the discharge hole of a spinneret in which the other discharge hole with a smaller discharge cross-sectional area is used as a single discharge hole, and at this time, the discharge hole with the larger discharge cross-sectional area of the pair of discharge holes is discharged. The polymer flow discharged from the discharge hole is
By making the polymer flow slower than that of the polymer flow discharged from the other discharge hole having a smaller discharge cross-sectional area, the high-speed polymer flow collides with the low-speed polymer flow and joins with the high-speed polymer flow while bouncing, and is then cooled and solidified. This is a method for producing a latent bulky multifilament, which is characterized in that the multifilament is subjected to a mixed fiber entangling treatment and then taken off.

The present invention will be explained with reference to the drawings.

FIG. 1 is a cross-sectional view of a ficimen 1- constituting the multi-ficimen 1- of the present invention, and a longitudinal side IS+ and the side view rotated by 90 degrees. a
) and mountain> are the multificimen 1 of this defense and shrinkage spots and staining spots, respectively? J graph showing the shrinkage rate in the longitudinal direction of the latent bulky multifilament.
Figure 4 is a cross-sectional view of the multifilament of the present invention, and Figure 5 is a cross-sectional view of the multifilament of the present invention.
The figure shows the stress (St)-elongation ([1) curve of the multifilament of the present invention, and Figure 6 shows the multifilament 1 of the present invention.
Figure 7 is a cross-sectional view of the +1 outlet hole of the spinneret for obtaining ~. C shows a filament perspective view (electron micrograph) when cut.

,gu Figure 1 1-a5″P1・”′1Long axis・°1Yo 0
The shaft papa' is a pair of concave parts facing each other with the wire (n) in between, 0 is the hollow part, m is the cross section of the filament, and the furnace shaft (C)
The maximum length of the straight line showing l among the straight lines parallel to ,
1 is 'l, ii in the 1θi plane including the hollow part (O)
+1 is a hollow part divided by 1 (C), and 11 is a solid part which is also divided by a minor axis (C), and the cross-sectional area of part 9 is always larger than that of part 11.

In the multifilament of the present invention, the cross-sectional shape of the filament is flat like a polygon as shown in FIG. The short axis (C
), and the hanging part, i.e. the maximum straight length (m
) is the hollow part (e).

Therefore, ficimen 1 to 0 of the cross section that corresponds to the cross-sectional shape are
The degree of orientation of the portion is higher than that of the portion h, and the filament has uneven thickness in the longitudinal direction of the filament as shown in FIG. 1 (C+ +d+).

Figure 1 (C) (Small) is a side view of ficimen 1- constituting multificimen 1 of the present invention and a front view obtained by rotating the side view by 190 degrees. The thickness in the longitudinal direction of the filaments constituting Ficimen 1 is 1<
T/ノdirection (2, -s・I し'(The cross-sectional area of the It part changes to +l+ than the cross-sectional area of the 0 part, so it joins.

In this way, the ficimen 1- constituting the multi-ficimen 1- (11) of the present invention has a cross section a3, and as shown in FIG. 9 has a high degree of orientation, and as will be described later, the degree of orientation is much higher than that in the case where the g part is solid because it is subjected to a large shearing force before spinning (C', in the longitudinal direction). Combined with the unevenness in thickness, it can have a greater contractile force than the conventional pulsing.

C1 The multifilament of the present invention needs to have the above-mentioned filament r-knee structure, and the constituent filaments are mixed and entangled.

Therefore, in the multificimen 1 of the present invention, as shown in FIG. 2(a), the phases of the high shrinkage portions σ of the constituent filaments do not align, so the high shrinkage portions and the low shrinkage portions are separated in the longitudinal direction 7j. The low shrinkage parts are dispersed.

Figure 2 + a) mountain shows the shrinkage rate in the eldest direction of the multifilament of the present invention and the latent bulky multifilament of the mixed fiber entangled portion.

This figure 2 shows that the multifilament boiling water shrink skewer is
Measurements were made using a 0 Cm bit, and the results were plotted.

As is clear from FIG. 2, the multificimen 1 to 1 of the present invention shown in FIG. Because the low-shrinkage parts and the low-shrinkage parts are dispersed, and there is a large difference in shrinkage within the filament and between the filaments as described above, wrinkle-like shrinkage spots and staining spots do not appear.
A uniform woven or knitted fabric having a F1F-like appearance and a spun-like texture can be obtained.

On the other hand, in the case of the wire shown in Figure 2+b+, the phases of the high-shrinkage parts and low-shrinkage parts of the constituent filaments align with each other, so that the high-shrinkage parts and low-shrinkage parts are omnipresent in the longitudinal direction. Although woven or knitted fabrics using such latent bulky multifilaments exhibit a spun-like texture, they develop grain-like shrinkage spots and band-like dyed spots, resulting in poor commercial value.

As described above, in the multifilament of the present invention, which provides a woven or knitted fabric exhibiting good appearance and texture, the difference between the maximum shrinkage rate and the minimum shrinkage rate in the longitudinal direction is 35% or less, especially 5% to 5%.
30% is preferred.

If the shrinkage rate exceeds 35%, high-shrinkage areas and low-shrinkage areas tend to become ubiquitous, and the improvement of wrinkle-like shrinkage spots and staining spots may become insufficient.

The number of entanglements in the multifilament of the present invention is preferably 10/m or more, particularly 15 to 80/skin. If the number of entanglements is less than 10 pieces/m, there is a tendency that the texture of the obtained woven or knitted fabric is insufficiently improved in terms of shrinkage spots and dyeing spots, as well as the texture.

11 In the present invention, preferred embodiments of the cross-sectional shape of the filament include those exhibiting an approximately eyebrow shape as shown in FIG. 1(a), or approximately isosceles triangular as shown in FIG. preferable. In particular, filaments having a substantially isosceles triangular cross-sectional shape are preferred because they can exhibit a unique luster.

The hollowness ratio of the 0 part in such a flat hollow filament is 2 to 30%, particularly preferably 10 to 15%, and the cross-sectional area S (l and 1
The ratio (S (!/Sh) of the cross section of the part to 8Ish is 1,2~
3, particularly preferably 1.5 to 2.

However, the hollow ratio and cross-sectional area S (+ and sh) are determined from a microscopic photograph of the cross-section of the filament.

In addition, the degree of deformation in the longitudinal direction of the filament, that is, the thickness of the filament that is bonded without winding 11 parts to 9 parts in the longitudinal direction of the filament as shown in Figure 1 (C) (small) This is highly desirable.

Naturally, the multifilament of the present invention, which is composed of filaments having large thickness unevenness in the longitudinal direction, also has large thickness unevenness in the cross-sectional direction.

This is true for Example-1r- shown in FIG. 3(a), which will be described later.
It is clear from the graph of the Worcester's mottling of the multifilament of the present invention obtained, and even when compared with the graph of the Worcester's mottling of the conventional pulsing yarn obtained in Comparative Example 3, which will be described later, as shown in Figure 3 (Figure 3). , the thickness variation in the cross-sectional direction of the multifilament of the present invention is large.

Incidentally, such Worcester's spots were determined using the Worcester-Evens Tester Model C manufactured by Zellweger Worcester.

Further, in the longitudinal direction of the filaments constituting the multifilament of the present invention, there are uniform large thickness irregularities [
Since the length [) from peak to peak is 0.5 to 377L] exists randomly, in an arbitrary cross section of a multifilament made of such filaments, as shown in Fig. 4, it is as if the denier difference is The same effect as when the filament 1- is mixed is obtained.

That is, in Fig. 4, Δ indicates the filament cross section which is the maximum cross-sectional area of one multifilament l-section C, and nl and +111 indicate the long axis and maximum linear length of the filament cross section (A), respectively. In addition, B indicates the filament cross section with the minimum cross-sectional area in one multifilament cross section shown in Fig. 5, and n2 and m2 are the filament cross sections (B
) shows the long sleeve and maximum straight length, respectively.

In general, filaments with different cross-sectional areas as shown in Figure 5 [
・In other words, when filaments with different deniers are mixed, a filament with a large cross-sectional area (thick denier) has a higher shrinkage rate than a filament with a smaller cross-sectional area (fine denier), so J, Therefore, the human denier filament contracts and becomes a tension carrier, and the fine denier filament protrudes to the outside of the multifilament 1~, so it is possible to create a stiff and beamy touch.

In the Mardinoiramen I- of the present invention, those in which the filaments 1 to (Δ) with the maximum cross-sectional area and the filament (B) with the minimum cross-sectional area satisfy the following formula [i] have a firm and soft touch texture. It is preferable to be able to exhibit the following.

111Xln H/n 2 XIR2≧1.5...
...[1] Furthermore, since the multifilament obtained by the present invention has large unevenness in the cross-sectional direction and longitudinal direction, that is, a large shrinkage difference, as described above, it appears as if there is a difference between the filaments and within the filament. It has a structure in which filaments 1 to 1 having different shrinkage are mixed together.

Therefore, the stress-elongation curve of the multifilament of the present invention is as shown in FIG.

Here, FIG. 5(a) shows the stress (St
)-elongation (El) curve τ, in FIG.

5) Figure M, J-j, 11 is the final elongation at break, 1-
2 indicates the elongation when the maximum stress is exhibited.

In this way, the elongation of 1-1 and 1-2 is seen as “l
i, +ii 3 good, 3.7M 5r, -1' A
', 7 (U8A I, -5 1.: Characteristics of Namisen yarn - (, Maru 1 - Neuramen 1 - made of filaments with extremely small or no shrinkage difference)
There are only 12 Cs that are normally seen.

In this respect, the multifilament of the present invention can provide the same effect as a mixed fiber yarn made of filaments with differential shrinkage.

The more human the value of (1-+-12) is, the more human the contraction difference is, and the value of (Ll-[2) satisfies the following formula [II]. Lamen I. is preferable because it allows a woven or knitted fabric exhibiting sufficient bulkiness to be obtained.

l--12≧20%...[I[] The multifilament of the present invention can be used not only in the undrawn state, but also by drawing and heat setting to obtain mechanical properties that can withstand practical use. Even if it is added, a product that fully satisfies the above formula [I[] can be obtained.

The multifilament of the present invention described above has the sixth
C1q can be first obtained by the FJ manufacturing method of the present invention, which employs a spinneret with the discharge holes shown in the figure on the right.

FIG. 6 is a sectional view of the spun spun [1 gold] discharge hole adopted in the production method of the present invention, 1a-1c and 2.3 are discharge holes through which the polymer flow is carried out, respectively, and 1 is 1a-1. 4c is a hollow part formed by a plurality of slits, 2 is an instep exit hole, 3
1A to 1C are the sleeves 1- and the hollow parts (4) to 4), which connect the hollow discharge holes and the single discharge hole (2).
To, 9. A2 is the inner diameter of the instep discharge hole, Q and Wt; L slit (31 width and length, pΔ1 and 9. C3+ is the outer diameter and inner diameter of the hollow discharge hole in Figure 6 (a) ,
.

The characteristics of such a discharge hole are that a hollow discharge hole composed of a plurality of sleeves l~(Ia~lc) is formed in a discharge hole with a large outlet area of nt as a pair of outlet holes with different outlet cross-sectional areas. , a single outlet hole (
2) was extensively adopted, and the hollow discharge hole and instep outlet hole (
2) are connected by a slit (3).

In the multifilament manufacturing method of the present invention, V
j 11 from the hollow discharge hole of the discharge hole in Fig. 6 just below the yarn opening curved surface.
Colliding the discharged polymer stream with a polymer stream discharged from a single discharge hole (2) having a flow rate of 8 speeds higher than that of the polymer stream;
It is necessary to join the fibers while bouncing them, then to perform a fiber-mixing and entangling treatment after cooling and solidifying them, and then take them off.

By adopting the vJ manufacturing method of the multifilament of the present invention, the contraction force of the multifilament i can be increased by increasing the shrinkage difference between the inner filament and the filament 21 which constitute the obtained multifilament. In addition, it is possible to disperse high shrinkage portions and low shrinkage portions in the longitudinal direction of the multifilament.

Here, in the discharge holes shown in FIG. 6, the combined discharge cross-sectional area (Sl) of the slits (1a to 1c) of the hollow discharge hole and the discharge cross-sectional area (Sl) of the single discharge hole (2) are made equal. Then,
Collision and bouncing of the polymer flow directly under the spinneret become so intense that stable spinning becomes difficult.

In addition, the hollow discharge hole and the single discharge hole (2) are connected to the slit (3).
), if a 1!1 hole is used, the difference in shrinkage between the filament and the inner filament of the obtained Nlubu filament will be insufficient.

Historically, in the case of 1q 12 y filament, which is taken without performing the 7fA fiber entanglement treatment, high shrinkage areas and low shrinkage areas are distributed evenly in the longitudinal direction, so the final woven or knitted fabric is Although it exhibits a somewhat spun-like texture, wrinkle-like shrinkage spots and staining spots are likely to occur.

The filaments constituting the multifilament produced by the manufacturing method of the present invention are flat hollow filaments having a cross-sectional shape shown in FIG. The polymer flow discharged from the hollow discharge hole is divided at the joint where the polymer flow discharged from the discharge hole (1) and (3) are joined, and the degree of orientation of the hollow part rY is adjacent to this. The degree of orientation of the fruit part is more human-like, and there are also uneven thicknesses in the longitudinal direction, as shown in Figure 1 (C) (small).

In addition, in FIG. 1, the 1:1 ratio of four parts indicated by x and x' is the polymer flow 1,1 discharged from the hollow discharge hole in FIG.
This is the joint where the polymer flow discharged from the upper discharge hole (2) hs + is joined.

In addition, in such a noise cross section, the C1 cross-sectional area is larger than that of the 1) part [ ] The characteristic of the manufacturing method of the present invention is that the degree of orientation of the part 11 can be more easily adjusted than the degree of orientation of the 11 part. As mentioned above, when such a filament is heat-treated, the contraction of the g part of the cross-sectional area is greater than the contraction of the h part, and as a result, a large contractile force can be exerted. .

The reason why such a filament can be obtained by the production method of the present invention is considered to be as follows.

That is, in general, the valley slit 1 constituting the hollow discharge hole
-1 and the flow velocity of the polymer stream passing through a single discharge hole is equal to n, the combined pressure drop across the plurality of ribs 1~ in a hollow discharge hole will be greater than that in a single discharge hole.

However, the hollow discharge hole and the single field hole (2) are combined in the same discharge hole via the sulin l-(31).
In the t ljl outlet hole shown in the figure, the pressure loss of both holes (
A difference in flow velocity is generated between the polymer streams passing through both holes so that the polymer flow rates are equal. For this reason, the slit of the hollow discharge hole is +1J, the single -
By adjusting the inner diameter (S △2) of the discharge hole (2), etc., the hollow discharge holes 1a to 1c of the sleeves 1 to 1C and the ribs 1 to 1
- It is possible to provide a flow velocity difference so that the flow velocity of the polymer stream discharged from the discharge hole (2) becomes faster, and to easily increase the flow velocity difference.

In this way, since the flow rate of the polymer flow passing through the slits (la to 1c) of the hollow discharge hole is slower than that of the polymer flow passing through the single discharge hole (2), the spinning draft is caused by the slit t of the hollow discharge hole. It is mainly concentrated in the polymer stream discharged from (la to 1c). In particular, in high-speed spinning, as a result of high draft concentrating on the polymer flow discharged from the slits (1a to 1c) of the hollow discharge hole, the hollow portion formed by the curling polymer flow is formed by a single hollow discharge hole. The polymer stream experiences a much higher degree of orientation than if it were solid, as it would experience greater shear forces than if it were pores.

First, the discharge hole (s2) of the discharge hole (2) is smaller than the cross-sectional area (Sl) for the total δ1 of the hollow discharge hole's sleeves 1 to (1a"・lc), and the obtained 1) than the cross-sectional area on the q side including the hollow part in the ficimen 1 to cross section
The cross-sectional area of the side becomes smaller.

Furthermore, the polymer flow speeds discharged from the hollow discharge hole and the medium-111 flower (2) are different, and the two small combined streams are connected by the small combined stream discharged from the slit (3). The polymer flow discharged from the hollow discharge hole
As a result of the polymer flow IIJ discharged from the discharge hole (2) colliding and bouncing and bonding, a filament having uneven thickness in the longitudinal direction as shown in FIG. 1 (C++d+) is obtained.

In addition, in the IFj manufacturing method of the present invention, the multifilament consisting of the filaments described in (1) is taken up after being mixed and entangled, so the obtained multifilament has high shrinkage parts and low shrinkage parts of the constituent filaments. The high shrinkage portions and low shrinkage portions are dispersed in the longitudinal direction as shown in FIG. 2(a), as shown in FIG. 2(a).

For this reason, the manufacturing method of the present invention allows 1! ? As shown in Figure 1, the cross-sectional area of the filament i~ constituting the Marub filament] is 1), including the hollow part.
The degree of orientation of the 9 parts, which are larger than the parts, is higher than that of the solid part, which is much higher than that of the solid part, which together with the uneven thickness in the longitudinal direction constitutes a conventional pulsing yarn. There is a large difference in shrinkage within and between the filaments in the Twin Men 1, and the cane has high shrinkage areas and low shrinkage areas distributed in the longitudinal direction.

The arrangement shape of the slits of the hollow discharge holes adopted in the manufacturing method of the present invention, and All you have to do is adopt the .

For example, the arrangement shape of the hollow discharge holes in the slot 11 is as follows:
Yagunitoku, 4! The J1 circular arrangement described in No. 1 Jt, No. 53.062 can be adopted, and among them, the diagonal arrangement shown in No. 6) is preferable.

Using such a diagonal hollow 0.1 hole, the hole '5' is shown in Figure 1 '1'. A filament that extends 4·i around an approximately -"-equipsagonal Fli surface shape is drawn.

61k, slit arrangement shape of hollow l exit hole and li -1
1 [If the cross-sectional shape of the exit hole is circular as shown in FIG. 6fa), the cross-sectional shape will be approximately cocoon-shaped as shown in FIG. 1(a).

The discharge hole shown in FIG. 6(a) is preferable because it is easy to make one discharge hole.

Furthermore, in Fig. 6, by connecting the outlet hole (2) and the hollow discharge hole of the single unit 11 with the upper sleeve l-(3), -C1 surprisingly, the upper discharge hole ( 2) The polymer stream discharged from the hollow PL outlet collides and bounces ( ) on one side of the polymer stream discharged from the hollow PL outlet, so that the solid part (h) is in the middle of the hollow part. ) Figure 1 (C) (11 + l) A filament is obtained in which the filaments are bonded without any problem, and the filament can be seen extending in the direction of the longitudinal direction of the twin men.

In this way, there is a large degree of orientation difference in the li direction of the cross section of Twin Men 1~, and a circle f consisting of Twin Men 1~ with a 4g-thick spot on the right in the longitudinal direction of Twin Men 1~.
After spinning, the filament is further stretched and heat-set to improve its mechanical properties for practical use (1'j), which is preferable because it can quickly generate sufficient shrinkage force.

The shape of the slit (3) is not limited to the linear shape shown in FIG. 6, but may also be hook-shaped or curved. The point is hollow 11
1 outlet hole and the instep outlet hole (2) are connected by a slot 11- (
There is C.

J, Rudo, Unexamined Japanese Patent Application Publication No. 11, in an experiment on invention town names, etc.
r(!i5-!i Publication No. 1809 (U.S. time n No. 4, 3)
32.7! When obtaining °C pulsing 87-n using the spun gold described in U.S. Pat.
The polymer flow discharged from the outlet hole is discharged from the discharge hole with a small discharge cross-sectional area, and a 2,000-merged flow is wound (only 1 q of multifilament consisting of 4 filaments joined together is produced, and the longitudinal direction of the filament is It's difficult to make a person's thick spots (1 (ah)).

, II, the length of slit 1 (・ni 3) is set in the direction of the resulting twin men l-rlli (shown in Figure 1, 1" recess (X,
X') is formed (cut, J, U1.9). Also, by defining It can be made larger, and it is possible to give a 141-th thick unevenness in the longitudinal direction of the 11-thick twin men 1-.

Therefore, it is possible to obtain a flat hollow filament using the hole 111 in Fig. 3 and the shape of the middle plane in Fig. 1 to the right.
Is it possible to do that?Twinmen 1~A cross-section microscope'
The hollow ratio of the true interlocking part is set to 2/30%, particularly preferably 10/15%, (the hollow part (e) of one part)
It is preferable that the ratio (Sg/Sh) of the i-plane heather S (+ and 1) portions to the cross section fiSh is 1.2 to 3, particularly 1.5 to 2.

It should be noted that one or more of the discharge holes (2) shown in FIG. 6 used in the present invention may be connected to one or more hollow discharge holes, ) shape is also triangular, square, Y
It may also be non-circular, such as a letter shape.

One specific method for the discharge hole of the present invention that has been described above is as follows:
The discharge holes shown in FIG. 6 fa) are shown below.

1・5≦81/S2≦15 0.04≦(1−ρB1 to W)/2≦0.300.1
0≦Su△2kusuB+ <SuA1≦ 1.50.05≦9
≦1.30 o, o3≦W/9. △2≦1.0 11F1. The units of each of C, S A+, L B+, UA2, Q, and W are (mm >
By applying 1J, it is possible to easily obtain a multi-filament in which different denier Neiramen 1 to 1 are mixed.

; In the method for producing a Nluji filament of the present invention (
, the flow velocity of the polymer flow discharged from the hollow outlet hole (■1), and the flow velocity of the polymer flow discharged from the A-discharge hole (2) (■
2) and the discharge speed ratio (Vl / V2) to 1/1.5.
It is preferable to set it to 1/7 to 1/7, especially 1/2.3 to 1/3.4, and the polymer discharge rate at this time [discharge rate of hollow outlet hole/single discharge hole (2) Discharge amount 1 becomes 37/1, 1
15, particularly preferably from 1.5/1 to i/3.3.

Now, FIG. 7 shows the shape of a spun filament obtained just below the surface of a spinneret having a discharge hole shown in FIG. 6(a) and within the above-mentioned size range III.

Figure 7 was obtained from the free A-le.
ca h t: Ill (7) Cross section s La 4ff
i, = A, g shows the mouth where the cross-sectional area on the side discharged from the first hole changes without any change. In addition, as shown in Figure 7, the polymer flow discharged from a single discharge hole is wrapped around the polymer flow discharged from a hollow discharge hole. It shows.

However, since the spun filaments shown in FIG. 7 were obtained from free-flowing alcohol without the action of the spinning draft, the amount of the spun filaments shown in FIG. Although there is a difference in cross-sectional shape, the length of the solid part is longer than the hollow part because the solid part bounces and joins the hollow part under the spinning draft action, so the length of the solid part is longer than the hollow part. ) is a filament having a cross-sectional shape of 1 to 1q.

After the polymer stream discharged and joined in this manner is cooled and solidified, it is subjected to a fiber-mixing and entangling treatment, and then taken off.

As a method for the fiber mixing and entangling treatment at this time, any commonly used method, such as electric fiber opening, Taslan nozzle, interlace nozzle, etc., can be arbitrarily adopted, and from the viewpoint of productivity and operability, Iny −Q −7,yo2
．． ,Yo. Ka0. . stomach. 122.6: How about interlaced nozzles? Japanese Patent Publication No. 36-12230 or Japanese Patent Publication No. 37-1175 (U.S. Publication No. 1 No. 30698)
No. 36, No. 3083523, No. 31101518 Mei 1
It is possible to adopt those known from books such as Book III).

The number of entanglements given to A1 during the above-mentioned mixed fiber entanglement treatment is 10 pieces/m or more, especially 15 to 80 pieces/m. It is preferable from the viewpoint of uniformly dispersing the parts and low shrinkage parts, and also from the viewpoint of the feel of the final product, woven or knitted fabric.

In addition, the higher the take-up speed is, the higher the spinning draft becomes, resulting in the hollow portions of the filaments 1 to 1 (
The degree of orientation of (]) is increased, and the shrinkage difference with the solid part (h) can be expanded.
A take-up speed of 500 or more is preferable since it can provide a high spinning draft of 500 or more.

Furthermore, by drawing the multifilament drawn after the fiber blending process and heat-setting it at a temperature of 100℃ or higher, the amazing mechanical properties of the multifilament can be put to practical use. However, it still has a large shrinkage force, and high shrinkage areas and low shrinkage areas are evenly distributed in the longitudinal direction, so heat treatment improves the appearance and wind resistance. A woven or knitted fabric can be obtained that has a good combination.

Here, when subjected to stretching without performing mixed fiber entangling treatment,
Since the low shrinkage portions (fine denier portions) of the constituent filaments are drawn more easily than the high shrinkage portions (thick denier portions), the difference between the high shrinkage portions and the low shrinkage portions is likely to be enlarged in a multifilament that is moved forward after drawing. In this way, even in multifilaments where the difference between high shrinkage parts and low shrinkage parts has increased, the difference in shrinkage can be reduced by subjecting the fiber blending and entangling treatment, but it is likely to be insufficient if the treatment is applied after stretching. Tend.

1' fj, the spinning take-off speed is 4000 m, / min.
．． It goes without saying that sufficient bulkiness can be achieved by heat treatment.

The cross-sectional shape of each filament in an arbitrary cross-section of the multifilament subjected to U IR in this way is shown in Figure 1.
There is a filament in the shape of a concave portion (X, X') in the cross section of the filament shown in the figure. Even if filaments with such a cross-sectional shape are present, a multifilament having only a small number of grooves can fully achieve the object of the present invention.

As mentioned above, (in melt spinning to obtain the multifilament of the present invention, even if the polymer stream discharged from the spinneret is taken out by cooling air at 11 L as in normal melt spinning, it will not be cooled. After that, it may be further heated and then removed.

In addition, there is a method of drawing after melt spinning and subjecting it to hot cera treatment. After that, it may be stretched and heat-sealed without being rolled up.

In addition, in the present invention, the target 1J melt spinnable ''''
Ya. K & 1. ．． 1.A. 1. ,,-ya1,6. stomach. . 85-Ej1%ヮ-1゜ is ig', JI direfthalate composed of -1"f-refj"rephthalate-1~, and the polymer has I-improved matte dyeing property and electrostatic charge. It is acceptable to include additives for nominal purposes such as prevention as copolymers or blends. Intrinsic viscosity of polyethylene terephthalate μ-1 (measured in 35° C. Ortsk L1 phenol) G:L is preferably from 0.45 to 1.20, particularly preferably from 0.50 to 1.00. When the intrinsic viscosity is less than 0.45 (well, 1! I), the strength level of the multifilament is low and undesirable. Also, when the intrinsic viscosity exceeds 1.20, the melt viscosity during spinning is too high. , which is not preferred because it requires a high melting temperature.

Moreover, it goes without saying that a commonly used melt spinning apparatus can be used as the melt spinning apparatus used in the present invention.

(Function) Conventional pulsing yarn is protected by 4 l [0 of the spinneret.
1-3 day IL A pair of discharge holes with different discharge areas are provided facing each other at an angle, and the discharge cross section Vi
O)/I, 8°. ,7. . 4゜+) −/ −4□,
0-, Tsua]2,):Length) is set shorter than the length of the polymer guide hole (land length) of the discharge hole having a large discharge cross-sectional area.

With this setting, the flow rate of the polymerization and body flow discharged from the discharge hole having a small discharge cross-sectional area is faster than that of the polymer flow discharged from the discharge hole used.

In this way, since a pair of polymer streams with different flow velocities collide and vibrate just below the spinneret surface and join together, a corresponding shrinkage difference can be created in the cross-sectional and longitudinal directions of the filament. It can be done.

However, as mentioned above, the shrinkage force of the pulsing yarn is insufficient, so the shrinkage force in the cross-sectional direction of the filament 1 is controlled, and the difference in discharge cross-sectional area is adjusted to obtain a highly oriented filament. Even if the cross-sectional area on the side of the drawer is changed manually, the difference in flow velocity of the polymer flow from both holes (: 11
It is difficult for the culm flow velocity difference 1ζ1 to be given by the culm flow velocity difference 1ζ1 which is given by adjusting the flow rate of the outlet hole, etc. Naru no C or 6
A pair of 1] 1 hole C has a limit (false.

1L1. ``□, the vibration caused by the collision of the two vehicles merging flow becomes more intense)'' Even if the thickness unevenness of the R-7 MEN 1- is not noticeable, if the installation distance of both holes is increased, the opposite effect will occur. The vibration decreases or disappears.

On the other hand, in the multifilament manufacturing method of the present invention, since a spinneret with a discharge hole as shown in FIG. And, the effect that the points of action of the spinning yarn 1 to the horn 1 become uniform in the polymer flow flowing through the hollow discharge hole is 1 Gt! As shown in FIG. 1, in the cross section of the filament 1, the degree of orientation on the q side is higher than that on the h side. (Jl l!ij
A multifilament consisting of filaments 1- is obtained.

That is, the plurality of slits 1 to slits 1 constituting the hollow discharge hole
~ C1 by adjusting the width and hole diameter of the single discharge hole, etc.
The difference in flow velocity between the polymer streams discharged from such a pair of discharge holes can be sufficiently overcome.

For this reason, an opening is created that allows the spinning trough to concentrate the polymer flow discharged from the hollow discharge hole, and a large shearing force acts on the polymer flow discharged from the hollow discharge hole, so that the degree of orientation in the hollow portion becomes solid. The orientation of the part is higher than 1u, and the hollow part can have a much higher degree of orientation than the solid one.

Moreover, the outlet area of the plurality of slits constituting the hollow outlet hole is smaller than the outlet surface of the Koda hole, and the solid part is d3 in the cross section of the filament (11 The cross section of the hollow part is larger than that of the hollow part.

;, 1: /;:, between both holes rli li! It is a person ni L/- (also,), IJ it'T: Both holes are connected and both polymer flows collide and bound J, person 2
\1. [It is possible to tighten the joint while generating vibration.]

Furthermore, in the manufacturing method of the present invention, the joining seventh step I:
After the small coalescence is cooled and then subjected to interlacing treatment to smooth the phase of the high shrinkage part and low shrinkage part of the constituent filaments, the high shrinkage part and low shrinkage part in the longitudinal direction of the multifilament 1 to be made by 1q are obtained. Part d′,,□. 8,61
mosquito,. . olah. .

In the cross section of the filament constituting the multifilament of the present invention where U < r4, the cross-sectional area of the hollow portion has a much higher degree of orientation than the solid portion. The solid part J also has a large shrinkage rate and also has large thickness unevenness in the longitudinal direction of the filament. They have a difference in shrinkage, and can be subjected to a large shrinkage force during heat treatment.

Moreover, since the component filaments are mixed and entangled to form an intertwined part, when the high shrinkage part of the filament shrinks during heat treatment, the low shrinkage part is simultaneously placed on the outside of the multifilament without any entanglement. Compared to C, it can protrude further and exhibit even more bulkiness. -In the fabric using such multifilament 1-,
It is possible to provide sufficient bulk to the heat treatment. In addition, even multifilaments with mechanical properties that can be put to practical use by further drawing and heat-letting undrawn yarns that have been completed by melt spinning still have sufficient shrinkage and , L'l' of the long side/J direction!
l IIY The i+i part and the low-yellow i part are dispersed! By using such a lubricant, it is possible to uniformly and sufficiently provide bulkiness to the fabric by heat treatment (JJ).

Historically, in this Komei, when the discharge hole shown in FIG.
The cross-sectional shape of the filaments 1 to 1q can be approximately isosceles triangular as shown in FIG.

Furthermore, the filaments constituting the multifilament of the present invention have large thickness irregularities in the longitudinal direction.
Along with the T, the fine denier and human denier parts (
It can also exhibit a soft and good texture similar to that of a mixed yarn made of I-Kome and Tatsumi-F Neil filaments, which do not have uniform fx phases.

(Effect of the invention) Is the υrebo filament produced by the present invention simply subjected to heat treatment? 4J can quickly achieve uniform and large bulkiness (because it can be handled in a flat state during the weaving and knitting process, it has good T-penetration properties).

Moreover, since it can be obtained from a single polymer without complicated operations, it is of extremely great significance in the T industry.

(Example) The present invention will be further explained below with reference to Examples, and the physical properties used in the Examples were measured by the method described above.

(1) For any cross section of n+, ml, and 112 + m2 Multi-noi Umen 1~, take a cross-sectional photograph at a magnification of 560 parts, and take a cross-sectional photo of Noura Men 1 with the largest cross-sectional area including the hollow part (nl). and maximum straight line IV (IIll)
, and the specific axis (I(2)) and the maximum straight line ffl(m2) of the ficimen 1 to cross section where the cross-sectional area is the minimum were actually measured.

(2) Elongation when applying the maximum stress (1-2> and final elongation at break (L+)) In a normal tensile tester, in a greenhouse at 25°C, wet polishing 60%
Then, calculate the stress-elongation curve for strip 1'1 with a sample length of 10 cm and a tensile speed of 200 mm/mm. Elongation at break (LL). (The measurement was 1)-5, and the average value was used. ) (:3) Mark the multifilament with 117 contraction variation in the longitudinal direction of the Nruji filament at iocm intervals with a load of 27 + 1'j/de (), and use it as a measuring sample with a sample length of 9 m. [Place in 1 pot and put 2 in C1 boiling water.]
0 minutes, 100 no-load treatments. After this, "mold" is canceled and each partial shrinkage rate change is 2#I! ? It was calculated continuously in the longitudinal direction from the following formula under a load of /(le.

Shrinkage rate (%) - [(10-fl+) /101 x
100rut: Clean water repair 1 (length) of each marked part at 100m intervals C
Float in water C for 30 seconds and read with the naked eye. This operation is repeated 4 times and converted to the number of entanglements per 1 m.

([]) Textured bulky windows and span-like feel)) 1'
The latent bulky Mardiff, r lament, was knitted into a tube, dyed using disperse dyes, and after washing and drying,
180°0'c' for 1 minute? Test 1'31 for Vt+ texture (bulky windows and span-like feel)
11Ii.

(6) Capacity retention of Maruza Filamen 1 - Shrinkage ratio of Maruza Filamen 1 - 〇＼l' (Measured by the following method).

(a) January 1st Wednesday! 1Y Make a [cure 1] of the shrinkage multifilament 1-, and add this [skein 1]
was treated for 30 minutes without any load while diving.
The shrinkage rate of li was determined from the following formula.

C(,!:1.o αt)/suo] +1>120
℃ dry shrinkage rate multiplier 1- force t te 1 is made, this 1-
/Jt! J A fishing hand equivalent to 12.5 mg (), 1
The shrinkage rate when dry heat treated at 20'CC for 5 minutes was determined from the following formula. 1 [(ρ0-ρ+)/, f2o] length) [Example-
11 Polyethylene-7 phthalate (containing 0.3% by weight of T!Oz as a matting agent) having an intrinsic viscosity [η1 of 0.64] was melted and the spinning temperature was raised to 300°C (-1 Fig. 6 (a)). Accordingly, a discharge rate of 37.!iz/min was discharged from one discharge hole.

Table 1 shows the dimensions of each part of the discharge hole used here.

(The above margins) Table 1 S2-π(0, △7/2)' (L stroke margin) J5 is in such a discharge hole, hollow discharge hole and instep-discharge hole (
2) Poly, 1-Chilefu J1 Tsunotare discharged from 1
- (hereinafter referred to as P E-r-), the discharge q1 ratio and discharge speed ratio are respectively 1. /i, 7 and 1/3.3.

Directly below the spinning I-1 metal (゛On one side of the polymer flow discharged from the hollow discharge hole, the polymer flow discharged from the first discharge hole (2) appears (!r+1 bump/bounce (! - Glue joints.

Then, 1) F1 stream had a temperature of 26°C and 18% humidity.
Blow 4J of α60% cooling air at a linear velocity of 30cm/sec
'C cold IA solidification 1ν, A Ilinta L1-sea oil agent (take-up speed 1q 45007+1 /
mm? Winding-, y 1', '75dQ7' 3
6f i I, nor f noino 2 (nt 1 meeting I, 2.

In addition, when taking 16 pieces, install an interlace nozzle,
A-part weed, 2%, interlaced horn, Le's compressed air 1:iy, 5.1(ff/'cni's f'
+ <', the mixed fiber entangling process is performed.

Fuishin 1 that constitutes such an unru 1 noinomen 1~!
The cross-sectional shape of Twin Men 1 was smaller than that shown in Figure 1 (the hollow rate of the 9th part was 12% (A), but C), and the direction of Twin Men 1 was \h direction t = 'b It has a man-sized unevenness, and this Nle 1 No. (Simmen J.'s Worcester IA is the third
As shown in Figure + a), there was a human like 0 (゛). and the minimum ratio of 111 (111Xm+/n2XII12
), (cross-sectional area S (I and h
The cross-sectional area of the part S) is the ratio of h<s(+/3h),
The stress-elongation curve and the strip 111 were measured and shown in Table 2.

(The following is the margin) Table 2 (The following is the margin) The number of entanglements of the iHI multifilament is 1.
5 pieces, '7n, and the longitudinal contraction of the multi-twinmen 1~ This change is shown in Figure 2 (a);
The difference between the maximum shrinkage rate and the small shrinkage rate was 30%.

Since the 1-2 of this nuluf-neurament is as low as 75%, it is necessary to further apply the stretched hot cera 1. It can be put to practical use as it is.

For this reason, the Maru f Neiramen 1- is knitted easily,
1. Inscription (disperse dyeing with '+1'l'c staining l).

[Dyeing Dye'11 Dyeing Li: 1 01 yO810111-asInla
n RIII (! Dye ratio; tube knitted 8P, 4% for ff2 Auxiliary agent: Shinogen (0.5%/'β) Bath ratio: 1/100 Temperature x time: 100℃ x 60 minutes A dyed whetstone After washing with water and drying, it was heated at 180°C for 1 minute.

5) Process the tubular knit dyeing sample 1 prepared in this way.
The staining spots and texture were visually judged.

(1) The dyed mottled areas and lightly dyed areas were extremely (uniformly dispersed, with a heather-like appearance, and no staining was observed.
[)・%) were not observed.

(2) Texture (a) Mainly bulky denier components, fine denier components are East J,
It had a good waist, and it had the same bulkiness as when using regular woolly yarn. Also, the bulky river could not produce a single child.

(b) Since the fine denier components are concentrated around the denier component, the tubular knitting surface has an extremely smooth and fine irregularity, giving it a strong spun-like feel.

[Comparative Example-11 Multi-reel yarn was spun in the same manner as in Example-1, subjected to mixed fiber entangling treatment, and wound at a rate of 45,001 rL/min.
- After dyeing, dyeing spots and texture were judged.

Incidentally, the change in the shrinkage rate of the Marub filament in the longitudinal direction is shown in the 2nd Doshiichi), and the difference between the -C1 maximum shrinkage rate and minimum shrinkage rate was 40%.

(1) Dyeing: Although the dyed and light dyed areas were relatively dispersed, there were some areas where the light and light dyed areas were clumped together and the difference in color was band-like. Furthermore, between samples (low%), there was a difference of 2=1 contrast.

(2) Texture (a) Bulkyness As in the case of Example-1, the bulkiness is sufficiently large, but there are shrinkage spots here and there, and there are bulky spots between the samples (n
+-5) also shows variations in IC.

(b) Spun-like feeling Although there was a spun-like feeling, the roughness of the simple knitting surface was poor, so the spun-like feeling was not as quiet as in Example 1.

[Example-21 Take-up speed is 30001 rL/min, [1,j output FA35
y/min 1'.Other than that, spinning was carried out in the same manner as in Example 1 to obtain a Marf filament of 105 dc/36 fil. 18 and I [The number of entangled Marub filaments is
35/71? , 1. Next, while preheating and drawing this undrawn yarn, heat setting it to the sleeve 1 with a heater and then taking it off was carried out according to the following regulations, 75
A drawn Marbufinomen 1- of de/36f i I was obtained.

1 Stretching heat setting 1-conditions] Preheating temperature 80°C Heat cera 1-・Temperature 240°C (Slit heater temperature) Stretching ratio 1.4 Stretching take-off speed: 500TrL/min The properties of this drawn Marub filament are shown in Table 3.

(Two-hand margin) 3rd person (hereinafter referred to as 1, margin) Table 4 (hereinafter referred to as margin) Although the cross section of the filament 1 constituting the Marub filamen 1 to 1 is flat, it has a shape that does not have a hollow part and has a longitudinal direction. The thickness spots were small. The Worcester edition of this multifilament was small, as shown in the third edition. Next, when this multifilament was knitted into a tube and dyed under the same conditions as in Example 1, it exhibited a certain degree of bulkiness.

However, the robustness of such bulkiness is poor, and the bulkiness easily disappears when an external force such as tension is applied. This means that the contraction force of multi-filament l-, which is made up of filaments of the same type, is small.

The number of entanglements in the multifilament obtained here was 15.
The difference between the maximum shrinkage rate and the minimum shrinkage rate in the longitudinal direction was 15%.

[Comparative Example 41] The procedure was the same as in Comparative Example 3, except that the spinning take-off speed was 3000 IrL/min and 36 entanglements/m were generated by the 11-entangle process.

Next, C1, this undrawn yarn was subjected to drawing heat-letting under the conditions of drawing heat-letting 1 of Example-2 (however, the temperature was 180° C. from heat cera 1).

Although the filament 1 constituting the multifilament obtained in this way is flat, there is no hollow part,
In addition, the thickness unevenness towards Asenbufu was also small.

Next, the properties of this multifilament are shown in Table 5.

(The following is a margin) Table 5 (The following is a margin) The number of entanglements of the drawn yarn was 23/m, and the difference between the maximum shrinkage rate and the minimum shrinkage rate was 10%.

The sample obtained by dyeing the tubular knit using this multifilament under the same dyeing conditions as in Example-2 had extremely poor quality, and was similar to paper that was knitted and dyed using flat yarn. It had a similar texture.

This means that the shrinkage difference between and within the filaments of such a pulsing yarn is small, and the shrinkage force of the multi-like man made of 41 filaments is small.

[Example-3] Using the outlet hole shown in FIG. 6(a), the dimensions of the discharge hole and the spinning take-off speed were changed as shown in Table 6. The yarn was spun in the same manner as in Example-2. Perform stretching heat setting, 75de/36fi
1 of Mardinoiramen]- was obtained. Such stretching heat treatment 1
The yarn a'1 to J0 is also shown in Table 6 with U. Also, a3 is used for spinning.
Collision/bound of polymer flow j1 o~1, a, □−
stomach. . , Yu61L;6VJ1. ='J'') A) Men 1~
The special f1 is listed in Table 7. The cylindrical knitted fabric using such multi-like men h was dyed under the same dyeing conditions as in Example-1, and the bulky feeling of the sample was also reported in Table 7.

As is clear from Tables 6 and 7, in the present invention, the difference in shrinkage within the J and C neuraments and between the filaments is noticeable, the shrinkage force is reasonable, and a good texture with no staining spots is exhibited. It turns out that you can easily get Zuru Multi Like Men 1.

(Margin below) difference

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a one-north filament constituting the nanofilament of the present invention, a longitudinal side view, a front view rotated by 90 degrees from the side view, and Figure 2 (a). as well as(
1)) is a graph showing the shrinkage rate in the longitudinal direction of the Marubrylamen of the present invention (and the latent bulky Marzilamen 1 used for shrinkage spots and dyeing.
4 is a graph showing the multifilament obtained in Example-1 and Comparative Example-3 and the conventional pulsing), respectively; FIG. 4 is a cross-sectional view of the multifilament obtained according to the present invention; Fig. 5 shows the multifilament stress (St)-elongation (El) curve of the present invention;
The figure is a front view of the 11.1 outlet hole of the spinneret for obtaining the multifilament of the present invention, and Figure 7 is the front view of the outlet hole in Figure 6 (a). (d) Figure z (1-[) 1?34艷i(')'7F3'/ Jin, w (-rf"1') Figure 5- ((L) l-1111'1 '3 Figure ((L) (wa) No. (]) 1 Figure CL ) ・II, /z+ 86- 汀7i

Claims (1)

[Claims] (1) Filament r4 made of a melt-spun polymer
In the multifilament L-, the constituent filaments are flat and have a pair of recesses facing each other across the long axis on the outer periphery in the long axis direction, and the pair of recesses The eccentric hollow filament 1 has a cross-sectional shape that is asymmetrical with respect to the short axis located therebetween, and a thickness unevenness in the direction of the filament i-1, the hollow portion having a cross-sectional shape that is asymmetrical in the filament cross-section. is located on the side where the straight line parallel to the short axis is maximum, and the degree of orientation of the hollow portion existing portion divided by the short axis is greater than the degree of orientation of the solid portion adjacent thereto; A latent bulky multifilament characterized by the presence of mixed fiber entanglements between the constituent ficimen 1. C. Potentially bulky multifilament 1-0(3) according to claim (1) The cross-sectional shape of the filaments is approximately isosceles triangular, and the filaments are large and have a diameter of λ·1.
It has a pair of recesses on the opposite long sides, and
The potentially bulky multifilament according to claim 1, which is asymmetrical with respect to the short axis between the pair of recesses. (4) The potentially bulky multifilament according to claim (1), wherein the solid portion is bonded to the hollow portion without being wound around the hollow portion in the longitudinal direction of the filament. (55) The potentially bulky multifilament according to claim (1), wherein the multifilament has an arbitrary cross-section of the filament satisfying the following formula II1. (6) Potentially bulky t1 multifilamen 1 to 1 according to claim (1), wherein said flexible filamen 1 to satisfies the following formula [■]. (7) The number of entanglements to the Mardinoiramen 1 is 10 pieces/m
The latent bulky multifilament according to Claim 1 (11Tl'i) which is above. The latent bulky multifilament according to range item (1). (9) The melt-spuntable 0'e, /, r polymer is
The potentially bulky multifilament according to claim (1), which is Sdell. (For 101, the 1λ4 discharge hole with a different cross-sectional area is made into a slit. The molten polymer is discharged through the QL outlet hole of the spinneret, in which the other discharge hole with a small ljl discharge area is used as a single discharge hole, and the other discharge hole with a smaller ljl discharge area is used as a single discharge hole. By making the discharge speed of the polymer flow discharged from the discharge hole with a larger discharge cross section of the pair of discharge holes lower than that of the polymer flow discharged from the other discharge hole with a smaller discharge cross section,
The latent bulkiness is characterized by colliding and bouncing a high-speed polymer flow with the low-speed polymer flow and bonding the same, followed by assimilation with the low-speed polymer flow, followed by a blending and entangling treatment and taking it off from f's +. Method for producing multifilamen 1. (11) The method for producing a latent bulky multi-filament according to claim 00, wherein the high-speed polymer flow is joined to the low-speed polymer flow without being entwined. 02) Arrangement of multiple slits forming the hollow discharge hole,
and the potentially bulky multifilament 1 to 1 according to claim 00), wherein the cross-sectional shapes of the single discharge holes are both circular.
manufacturing method. 03) Arrangement of multiple slits that cover the hollow discharge hole 1
A method for producing a potentially bulky multifilament h according to claim 1 (g), wherein the polyfilament h is non-circular. 0/l) Claim 001 or 03, wherein the plurality of slits constituting the hollow discharge hole are arranged in a triangular shape.
) A method for producing the latent bulky multifilament 1- as described in item 1. 05) Claim No. 10 which is a spinneret consisting of a pair of discharge holes connected in series by a sleeve l-
) A method for producing the potentially bulky multifilament according to I0. 06) Sleeves 1 to 1 have a pair of eye holes connected to each other in a perfect manner.
1-, Patent No. 5'1, Claim No. 00) or No. The flow rate (vl) of the polymer stream discharged from the medium-1j1 outlet and the flow rate (v2) of the polymer stream discharged DI from the medium-1j1 outlet are flow rates that satisfy the following formula [11] [1] Method for producing latent bulky multifilamen 1-. 1/1.5≦Vl/V2≦1/7...
[I[[]08) A method for producing a potentially bulky multifilament l- according to claim 001, wherein the anal filament interlacing treatment is performed using an interlace nozzle. 09) The method for producing a latent bulky multifilament according to Claim No. (to) Jl'i or No. 08), wherein the number of entanglements imparting NJ is 10 pieces/m or more. □□□ The method for producing a potentially bulky multifilament according to claim 001, wherein the take-up speed is 2500 m/min or more. (21) Claim No. 1 (
10) A method for producing a potentially bulky multifilament according to item 10). (271 A method for producing a latent bulky multifilament according to claim (lO) or (21), in which stretching is performed after the mixed fiber entangling treatment. T23 Take-up stretching at 4000 m/min or more A method for producing a latent bulky multifilament 1- according to claim 001, which is wound without being coated.Q4 Claim 0, in which the polymer is polyester
A method for producing a potentially bulky multifilament according to item 01 or item 0n.