JPS60185809A - Production of latent high-bulky multifilament yarn and spinneret therefor - Google Patents

Abstract

PURPOSE:A couple of a hollow nozzle of a large cross section and a simple nozzle of a small cross section are connected with a slit whereby the resultant multifilaments are increased in shrinkage difference between intra- and inter- filaments. CONSTITUTION:A polymer is extruded through a spinneret in which a plurality of hollow fiber nozzles composed of slits 1a-1c and simple nozzles 2 are connected with slits 3. The polymer flow extruded out of the simple nozzle 2 at a higher speed than the other polymer flow through hollow nozzle violently collides with the latter to effect adhesion as the former is bouncing, then solidified by cooling, and taken up at a speed of over 2,500m/min. After drawing, the resultant filament has big difference in shrinkage in both cross-sectional and longitudinal directions to show satisfactory shrinking force.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing latent bulky multifilaments 1 to 1 and a spinneret therefor, and more specifically, the present invention relates to a method for producing latent bulky multifilaments 1 to 1 and a spinneret for the same. The present invention relates to a method for producing a latent bulky multifilament and a spinneret.

(Prior Art) A latent/existing bulky multifilament whose bulkiness can be accelerated by separating heat treatment can be obtained by mixing filaments having different shrinkage. For example, U.S. Pat. No. 3,200 , 570 specification)
.

Such multifilaments are given bulk by the high shrinkage filaments shrinking during heat treatment and the low shrinkage filaments protruding.

In this case, the high shrinkage filament is made with a thick denier, and the low shrinkage filaments 1 and 1 are made with a fine denier.
It will speed up your soft touch.

By the way, in order to produce 1 q of multifilament made of filaments having such a shrinkage difference, a method of blending a plurality of yarns to which a shrinkage difference has been given in advance is often adopted. The following method is proposed in the publication (US Pat. No. 4,153.() No. 60).

That is, in this method, a spun yarn obtained by cooling a polymer stream discharged from the same spinneret is divided into two yarn bundles, and one of the yarn bundles contains a spun yarn containing mainly water. 14 finishing agents
After that, the other yarn bundle is treated with an agent that has a boiling point higher than that of water, and both yarn bundles are separately heat-treated under the same conditions and stretched, and then the two yarn bundles are strung together. .

This method uses the boiling point difference of the spinning finishing agents to impart a shrinkage difference between the yarn bundles, but it is extremely complicated to apply two types of finishing agents. 4 knife operation/71
1 is required.

Furthermore, if a denier difference is created between the filaments constituting the spun yarns discharged from the same spinneret, the filaments 1 to 1 will become dense due to yarn shaking, or...i-yarns, etc. It is easy to cause problems, and it is necessary to strictly control the spinning thread ('1) such as 1-rat ÷'', 1-wind L1, etc.

This is scorching, and it can be hidden without performing such complicated operations (1
- Bulky ↑] 1 mark F - The method of manufacturing filament is F
Ima Showa 54-4241! Publication No. i and JP-A-54-i
No. 51809 (US 1!;'l No. 4,332,7
No. 57 and the CJfJ proposal in U.S. Time [No. 4,34!1.604].

This method (spinning of L A) is arranged in a polyester fabric with two flow differences through a pair of discharge holes that are opposite to each other and have different discharge cross-sectional areas. Directly above the nozzle surface, the low-speed polymer flow discharged from the discharge hole whose discharge cross-sectional area is the same as that of the pair of discharge holes is discharged from the discharge hole whose discharge cross-sectional area is smaller than It is a process in which high-speed polymer streams are joined together while colliding and vibrating, then quenched and rolled up (・ah-), and is called pulsing. ) has a shrinkage difference in the cross-sectional direction and longitudinal direction.
It consists of a filament of t.

However, it is common for such latent bulky yarn filaments to be heat-treated after being made into a woven or knitted fabric; It has the drawback of telling fortunes when it runs out.

In other words, the binding force due to the weave structure of the fabric is strong, and the shrinkage force of the pulsing layer is low, and the contraction of the pulsing layer is limited, resulting in a lack of bulk. Due to this.

In addition, such pulsing yarns have the disadvantage that the shrinkage difference disappears when the yarn is spun and further stretched from -C to -C. I have no choice but to use it. This I-kome, pulsing (7
- In woven and knitted fabrics using fibers, wrinkle-like shrinkage spots 1b staining spots may occur.
It could not be put to practical use due to the restriction of J.

(Objective of the Invention) The first objective of the present invention is to produce a potentially bulky multifilament that can exhibit uniformity and sufficient bulkiness without shrinkage spots or dyeing spots in woven or knitted fabrics, especially textiles. Samurai law and 91
It is to submit 21 gold coins.

The second object of the present invention is to provide sufficient bulk (shrinkage
ji41. Process for producing latent bulky multi-noiramen l- and spinning thereof to obtain l'gold 11? It's about offering.

The fourth object of the present invention is to provide a method for producing a latent bulky multifila, Men 1, which can provide a firm and soft touch similar to that of a multifilament in which filaments of different deniers are mixed, and the spinning thereof. The goal is to provide the following.

(Structure of the Invention) In order to achieve this purpose, Kokamitsu Meishu passed the inspection, and discovered that the conventional method for producing pulsing yarn was a3. 1.a
C: There is an insufficient difference in the flow velocity of the polymer streams discharged from a pair of discharge holes that face each other and have different discharge cross-sectional areas; however, a pair of polymers are discharged IV1 from the discharge holes directly below the spinneret surface. The vibration period of the light generated when the flow collides and vibrates while bonding and welding is also small. Pulsing 1 that will blow your mind
It has been found that the shrinkage difference within the filaments constituting the filaments and between ficimens 1 and 1 is small, and that the pulsing force of the pulsing 17-ton made of such filaments is inferior.

As a result of further investigation based on this knowledge, the inventor of the present invention connected a pair of discharge holes of the spun 21-karat gold with a sleeve.
In addition, it is possible to make the n1 outlet hole with a small discharge cross-sectional area a hollow discharge hole whose hollow part is formed and covered by a plurality of sleeves 1~, and to make the other discharge hole with a small discharge cross-sectional area a single discharge hole. We have discovered that this method is effective in increasing the shrinkage difference within and between the filaments of Neiramen 1 and improving the shrinkage force of multifilamen 1 made of such filaments 1, and have arrived at the present invention.

That is, in the present invention, a pair of polymer streams having different flow velocities are discharged from a pair of discharge holes having different discharge cross-sectional areas for spinning by melting the polymer A, and then flowing the polymer to the bottom of the spinneret. Then, the low-speed polymer flow discharged from the discharge hole having the discharge cross-sectional area of the pair of discharge holes is equal to the high-speed polymer flow discharged from the discharge hole having the smaller discharge cross-sectional area is joined while colliding and bouncing. In a method for producing a multifilament, which is then taken up after being cooled and solidified, the pair of discharge holes are connected to each other by a slit, and the discharge hole having a large discharge cross-sectional area is formed with a plurality of slits to form a hollow part. The hollow discharge holes are made into a single discharge hole, and the other discharge hole with a smaller discharge cross-sectional area is made into a single discharge hole.
This is a method for producing a latent bulky multifilament characterized by a C take-up of 500 m'/min or more, in which a pair of ejection holes with different ejection cross-sectional areas are installed in a spinneret, and the pair of ejection holes are slit. The discharge hole that is connected to the r knee H and has a large discharge cross-sectional area is a hollow discharge hole that forms a hollow part with a plurality of slits, and the other discharge hole that has a small discharge cross-sectional area is covered with a single discharge hole. This is a latent bulky multifilament spinneret featuring the following characteristics:

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

FIG. 1 is a cross-sectional view of the discharge hole of the spinneret of the present invention, FIG. (Al and mountains) in FIG. 4, which is a perspective view in the longitudinal direction of filaments constituting the multifilament obtained by the present invention, are respectively illustrated in Example-1, which is a specific example of the present invention, which will be described later.
Figure 5 is a cross-sectional view of the multifilament obtained according to the present invention, and Figure 6 is a cross-sectional view of the multifilament obtained according to the present invention. Figure 7 shows the multifilament stress (St)-elongation ([1) curve obtained by A perspective view (electron micrograph) of the filament 1 when cut is shown in FIG. 1. In FIG. 18 - Hollow part formed by a plurality of slits indicated by 1G, 2 is the instep-discharge hole, 3 is the hollow discharge hole consisting of the sulins 1 to 1a to 1c and the hollow part (4), and a single discharge hole (2), JJA2 is the inner diameter of the single discharge hole, S and W are the width and length of the slit (3), uA+ and 12B+ are the outer diameter of the hollow discharge hole in Figure 1 (al). and the inner diameter is shown.

The multifilament manufacturing method and spinneret of the present invention a.
It is important to use a mm outlet hole shown in FIG. 1 as the outlet hole for discharging the 3°C1 molten polymer.

The characteristics of such a discharge hole are that, as one discharge hole having different discharge cross-sectional areas, a hollow discharge hole composed of a plurality of sulins 1 to 1 (18 to 1c) is formed in the discharge hole having a large discharge cross-sectional area, and the other discharge hole is The hollow discharge hole and the single discharge hole (2) are connected by sulins 1 to (3). It is in.

The method for producing a multifilament of the present invention (
Directly below the spinneret surface, the polymer stream discharged from the hollow outlet hole of the discharge hole shown in FIG. are joined together while colliding and bouncing, and then after cooling and solidifying at 141° C.
It is necessary to take over at 500 m/min.

By employing the manufacturing method and spinneret for the multifilament 1- of the present invention, it is possible to increase the aggregation difference within the multifilament 1q and between the filaments. Direct the contraction force of -Lt! It is possible to reduce it.

Here, in the discharge hole of FIG.
If the discharge cross-sectional area (S2) of the single discharge hole (2) is made equal to the discharge cross-sectional area (S2) of the single discharge hole (2), the collision and bouncing of the polymer flow directly under the spinneret will become too severe, and stable 2j spinning will become rotational.

In addition, the hollow discharge hole and the single discharge hole (2) are connected to the slit (3).
), or when using a discharge hole that is not connected to
The shrinkage difference within and between filaments of a multifilament that is Vl becomes insufficient.

The filaments constituting the multifilament obtained by the present invention are flat hollow filaments having the cross-sectional shape shown in FIG. Junction where the polymer flow discharged from single-o1 outlet (3) joined -Czuj i'
, the degree of orientation of the hollow part (right part 'I) to be tl depends on the degree of orientation of the adjacent solid part, and there are irregularities in thickness in the longitudinal direction (JI 1u stone). It is.

In Figure 2, (13, Figure 2 (a) mountain) shows the cross-sectional shape of ficimen 1-, which is made using the Tagawa hole (11) of Figure 1 (11). is the long axis, C is the short axis,
x and x' are a pair of recesses facing each other with the long axis (11) in between.

0 is the length of the straight line with the maximum value at the back of the straight line parallel to the minor axis (c) in the filament cross section for 1 m of the hollow part.

q is in the cross section including the hollow part <a>, and (1(C
) and the hollow part to be divided, 11 is also 710 axis (C
) The cross-sectional area of the solid part C ah-U, 00 part divided by 11 parts is always larger than that of the 11 parts.

In addition, a pair of four parts indicated by x and x'r are joint parts where the polymer flow discharged from the hollow discharge hole in FIG. be.

Therefore, in such a filament cross-section, the cross-sectional area is 1
Orientation 1'J (l!-
One of the characteristics of the production method of the present invention is that the degree of orientation J of the h portion can be adjusted
When heat treatment is applied to the area, the shrinkage of the 0 part of the l17i area becomes the shrinkage of the 11 part J, and the rim person 4, and as a result, the shrinkage force L can be exhibited.

The reason why such -Neuramen 1- can be obtained by J in the present invention is considered as follows.

That is, in general, each of the sleeves 1 constituting the hollow discharge hole
-1 and A-If the flow speeds of the small combined flows passing through the discharge holes are equal to each other, the total h1 pressure loss of 10% of the small number of slits in the hollow hole will be 10% less than that of a single 111 hole J.

However, if the hollow discharge hole is connected to the discharge hole (2) through the slit (3) in the same discharge hole (11), the discharge hole of the present invention shown in FIG. hole pressure 1
(A difference in flow velocity occurs between the polymer flows passing through both holes so that the loss of 1 is equal. For this reason, the slit rl+ of the hollow discharge hole
, by adjusting the inner diameter (ρΔ2) of the instep discharge hole (2), etc., the hollow discharge hole la-・i cq)
-J, rim instep - The flow velocity difference is increased so that the flow velocity of the polymer flow 1!1 discharged from the discharge hole (2) becomes faster ("l!-j"), and the flow velocity difference is easily reduced. There is a thing-C monkey.

In this way, the hollow 111 outlet slot t-(la~1c)
Since the flow velocity of the polymer flow passing through the hollow discharge hole (2) is higher than that of the polymer flow passing through the hollow discharge hole (2), the spinning draft was drawn from the hollow discharge hole slot t (1a to 1C). 1) Mainly concentrate on combined flow. In particular, the spinning take-off speed is 2500771/
In high-speed spinning of more than 500 minutes, more than 500 Hatatruts concentrate on the polymer flow passed through the slits (18 to IC) of the 111 holes in the hollow part, and as a result, the hollow part formed by the polymer flow becomes hollow. When the discharge hole is a single Tagawa hole, it receives a larger shearing force (J (, polymer) when p is solid C,
"The highest degree of orientation" (because of the high degree of orientation)

In addition, the discharge cross-sectional area (S2) of the instep discharge hole (2) is the sum of h1 discharge cross-section f of the hollow discharge hole slots I~(1a~・10).
Since it is smaller than f1(St>, the obtained 749721
The cross-sectional area J on the q side including the hollow part at a3 on the ~m1 plane, and the IOi on the rim I) side become smaller.

Noiramen l-111i +ri wearing a hat like this
The 0 part, which has a larger cross-sectional area including i- (the hollow part 4G, as shown in FIG. 2) than the h part, has a b^ orientation that is larger than the 11 part.

Furthermore, if the flow rate of the polymer flow discharged from the hollow discharge hole and the middle discharge hole (2) is different, the polymer flow discharged from the sleeve +-[3+ will have the same amount of polymer flow as described above. Because they are connected, the polymer flow discharged from the hollow discharge hole connects to the single outlet hole [2] hl r as a result of the discharged polymer flow joining together while pounding. As shown in the figure -
Fig. 3 shows the filament cross section with the thickness facing towards the hands and ends (al is the filament 1 to 1 obtained by the present invention).
Fig. 3 (1) is a longitudinal perspective view of Fig. 3 (1).
Take a perspective view of ficimen 1 in the direction of 1,000 lj after turning a) 90° φλu. Also, 1. - indicates the interval of thickness irregularities in the longitudinal direction of ficimen 1.

The thickness unevenness in the longitudinal direction of the filament obtained by the present invention varies more greatly in the longitudinal direction than the cross-sectional area of the 11-part tapered part, as shown in Fig. 3 (a). It is joined together.

In this way, the filaments constituting the multifilament obtained by the present invention have −C, second
As shown in the figure, the degree of orientation in the 9th part, which has a larger cross-sectional area including the hollow part than the h part, is high, and the degree of orientation is -6 much lower than in the case where the 0th part is solid. Together with the flaws, the fibers can have a larger shrinkage difference than the filaments 1 to 20 constituting conventional pulsing yarns. As a result of (a), even if the fabric has a strong binding force in the weave structure, the fabric using the multifilament 1 obtained by the present invention exhibits uniform and sufficient bulkiness.

The arrangement shape of the hollow discharge holes 1- and the cross-sectional shape of the single discharge hole employed in the present invention are not particularly limited, and the optimum shape may be adopted depending on the purpose.

For example, as the arrangement shape of the slits of the hollow discharge hole, the non-circular arrangement described in British Patent No. 853,062 can be adopted, and among them, the triangular arrangement shown in FIG. 1(b) can be adopted. Preferably.

According to the discharge hole shown in Fig. 1+b〉 using such a triangular hollow discharge hole, one filament having an approximately isosceles rectangular cross-sectional shape shown in Fig. The multifilament made of this material can exhibit a unique luster.

Moreover, if the slit array shape of the hollow discharge hole and the cross-sectional shape of the discharge hole 111 are circular as shown in FIG.

FIG. 1 (Al discharge holes are preferred because they are easy to work with.

Furthermore, in FIG. 1, the single discharge hole (2) and the hollow discharge hole are connected by the instep slit (3).
Surprisingly, the polymer flow discharged from the single discharge hole (2) collides with the polymer flow discharged from the hollow discharge hole on one side.
Since the filament is bonded while bouncing, a filament as shown in Fig. 3 is obtained in which the hollow portion (Φ) and the solid portion (+li) are bonded without twisting, and the filament has a large thickness unevenness in the longitudinal direction. I can do it.

In this way, Mardinoiramen 1~ is composed of Neuramen 1-, which has a large difference in the degree of orientation in the cross-sectional direction of the filament, and has thick irregularities in the longitudinal direction of the filament.
After spinning, the fiber is further stretched and heated to obtain mechanical properties that can be put to practical use.

In addition to the linear shape shown in FIG. 1, the shape of the sulin 1-+31 is crab-shaped or curved.The point is that the hollow discharge hole and the 1li-discharge hole (2) form the sulin. It is connected by 1~.

On the other hand, according to the inventor's experiments, it was found that
5180' March Publication (U.S. Pat. No. 4,332,7j-7)
The pulsing yarn is made from spun 11-karat gold described in No. 4,349,604 of the U.S. Pat. Only a multifilament consisting of filaments in which the polymer flow discharged from a discharge hole with a small discharge cross-sectional area was wound and bonded to the discharged polymer flow was obtained.
Giving a large thickness unevenness in the longitudinal direction of (1) was rotation.

Also, the length of the slit (3) is determined by the length of the filament I obtained.
- By setting and covering the cross section d5 to form the four parts (X, X') shown in FIG. The collision and bounding of the merging flow can cause the vibration period to be jerked, and the length of the filament can be as small as 1 (J 4). Monkey.

Then, a flat hollow filament having the cross-sectional shape shown in FIG. 2 can be obtained using the discharge hole shown in FIG.
The hollow ratio of the part is 2 to 30%, particularly preferably 10 to 15%.
%, and the ratio (SF/Sh) of the cross-sectional area Sadh portion including the hollow portion +e+ of the 9th portion to the cross-sectional area vIS11 is 1.2 to
3, particularly preferably 1.5 to 2 and 7.

In addition, in the discharge hole adopted in the present invention, one or more instep discharge holes (2) shown in FIG. 1 may be connected to a hollow discharge hole, and the shape of a single discharge hole (2) may also be triangular, square.

It may also be non-circular, such as a Y-shape.

The specific dimensions of the discharge hole of the present invention described so far are as follows:
Regarding the discharge hole in Fig. 1(a), 1.5≦S is shown below.
l/S2 ≦15 0.04 ≦ (9Δ+ -flB+ ＞/ 2≦ 0
．． 300.10≦ρ△2kuΩB+<ρA1≦ 1.1)
0.05 5 μ≦ 1.30 0.03:”1W-4△2≦1.01i (1, U
AI, U13+, MA2. fl, W (The median of D people is (mm) T.) It is interesting that by adopting the spinning yarn 1'' consisting of 4R holes like this, C1 is mixed with different denier fibers. Multifilaments like I can be easily obtained.

In the multifilament manufacturing method of the present invention, the flow velocity (vl) of the polymer flow discharged from the hollow discharge hole and the flow velocity (■) of the small combined flow discharged from the single discharge hole (2).
2) Which discharge speed ratio (V+/V2) is 1/'1.
5 to l/7, especially set to 1/2.3 to 1/3.4.
That's possible! If the polymer discharge +0 ratio at this time [
Discharge amount of hollow discharge hole/discharge amount of single discharge hole (2)] is preferably set to 3/1 to 115, particularly 1.5/1 to 1/3.3.

Now, there is a discharge hole c'' shown in FIG. 1 (al), and a spinneret surface m1'F' (
'The shape of the resulting ejected noirament is shown in Figure 7.

Figure 7 shows one tree fall'1IFl and shows that the cross-sectional area on the side discharged from the hollow outlet remains almost unchanged, but the cross-sectional area on the side discharged from the single discharge hole changes. I'm showing you. In addition, as shown in Fig. 7, it is also an innovation that the polymer flow discharged from a single discharge hole vibrates in one direction without being turned over by the polymer flow discharged from the hollow discharge hole. It shows.

However, since the spun filaments shown in FIG. 7 are obtained using a free-knoll Δ-roll that is not affected by the action of the spinning drum 71, the filaments constituting the multifilament 1, which can be seen in the light from the wood 5, are The cross-sectional shape and difference vI! is recognized, but
Spinning 1' Raft ('+ River C has the solid part bonded to the hollow part while bouncing, so the length of the solid part is longer than the hollow M1 J: ), a filament with a filament cross-sectional shape can be obtained.

The polymer stream discharged and bonded in this manner is solidified by cold JJI, drawn at a speed of 2500 m/min or more, and stretched at a temperature of 1 By applying ~, especially J, -), it is possible to increase the mechanical B1t'l of the multifilament to a point where it can be put to practical use. However, since there is still a large shrinkage difference in the cross-sectional direction and in the longitudinal direction, the bulkiness can be sufficiently reduced by heat treatment.

In addition, when the spinning take-off speed is 4000 m/min or more, especially 4
500-55007+1. /min, a multifilament with a temperature of 451% can be put to practical use as it is, and such a multifilament can be made sufficiently bulky by heat treatment. lshii! There is no need to predict what you will get.

Hereinafter, in the method for producing fulfi filamen 1 to 1 of the present invention described above, the polymer flow discharged from the spun Lj gold as in C1 ordinary melt spinning is cooled with cold 7JI Ml and taken out (after cooling 741Ml). It is also possible to take it off after further heating.

MarlJ, stretched after melt spinning and heat-wrapped jj7
1, and L '7 let ta * ml li name 17 teka day - day 13 * nV rr I] Stretch and heat set in a separate process from 1 -C or melt-spinning -1
-417) Stretch without scraping and apply heat treatment 1~-C
Good too.

As mentioned above, the multifilament obtained by the method for producing the Marf filament 1- of the present invention and the spun Li gold has a large degree of orientation difference in the cross-sectional direction of the filaments 1 to 1, which constitute it, and also in the longitudinal direction. It also has irregularly thick spots.

Filamen 1 with such uneven thickness in the longitudinal direction
Naturally, the multifilament 1q according to the present invention, which is composed of fibers, has large thickness unevenness in its cross-sectional direction.

This is clear from the Worcester spot graph of the multifilament obtained in Example 1, shown in Figure 4(a), and shown in Figure 4). Comparative example-2
Even when compared with the Worcester spot graph of the conventional pulsing A7-n obtained in Figure 1, the thickness 91 in the cross-sectional direction of the multifilament obtained by the present invention is impressive.

Incidentally, such Worcester spots were measured using the Worcester Evenness Tester Model C of Zellweger Worcester Attire.

In addition, Fig. 3 shows G in the longitudinal direction of the ficimen 1 constituting the multificimen 1- obtained by the present invention. 5
~3 TrL] exist randomly, so in an arbitrary cross section of the multificimen 1~ consisting of the -Neuramen 1~, as shown in Fig. 5, it is as if filaments with different deniers were mixed together. It has a similar effect.

In other words, in Fig. 5, at J3, A indicates the ficimente t-IfJi blood which is the maximum cross-sectional area of the multificimene 1-1llilrii'r- of one tree, and IT l and m are the lengths of the filament cross-sections (△). The axis and maximum linear length are shown respectively. In addition, 13 shows the filament 1-cross section of the minimum cross-sectional area in the multifilament cross section of one tree as shown in FIG. 5, and 02
and m2 indicate the long sleeve and maximum linear length of the filament cross section (B), respectively.

Generally, finmen 1 with different cross-sectional areas as shown in Figure 5 are used.
-1, that is, ficimen 1- with a difference in denier is mixed, and - (thick-neel filaments with a large cross-sectional area) are more filaments than ficimen-1- with a smaller cross-sectional area (thinner, -uniform). Because the shrinkage rate is large, thick denier ficimen l-T; (shrinks and becomes a tension supporter by heat treatment, and thin denier ficimen 1~ becomes mardinoiramen 1~
Since there is a protrusion 1 on the outside of the fabric, it is possible to create a texture with a firm and linear touch.

The present invention (・obtainable multificimen 1 ~ odor-C1
If the ficimen I-(A) with the maximum area of one can and the filament (B) with the minimum cross-sectional area satisfy the following [formula II]t, a firm and radiant touch can be achieved quickly. preferable.

nl xml/n2X'1l12≧1.5 ・・・・・・
・[II] In addition, the multifilament (3L) of the present invention has large unevenness, that is, a large shrinkage difference, as described above in the cross-sectional direction and longitudinal direction. It has a structure in which filaments with different shrinkage are mixed in the filaments.

For this purpose, one of the multifilaments obtained by the present invention
．． The toker elongation curve is shown in Figure 6.

Here, FIG. 6(a) shows the stress (St) - elongation (T1) of the undrawn multifilament obtained by the manufacturing method of the present invention.
6) is the stress (Sti-elongation (1 to 1) curve) of the multifilament which was further stretched to 1q after spinning.

In Figure 6, L+ indicates the final elongation at break, and l-2 indicates the elongation at maximum stress. The difference in shrinkage is 1
This is a characteristic of a mixed fiber yarn made of filamen 1-, which has a small shrinkage difference (Φ) or no shrinkage difference, usually only 1-2 is seen. It's just a matter of being exposed.

In this regard, in the multifilament obtained by the present invention,
It is possible to produce the same effect as a mixed fiber yarn made of filaments with different contractions without having to manipulate konsen or the like.

And, the larger the bribe of (L+-12), the more::+!
Ilv m @ /6 -person-1ζ sh ノ, 1
and 'x;r;l+I's 1+s A (l
+ --1-2) satisfies equation [11]! Rujinoiramen 1 ~ has sufficient bulkiness, and woven and knitted fabrics 1
! I can say that it is preferable.

L -1,2≧20%...[II] The multificimen 1~ obtained by II-Ai can be used not only in the undrawn state but also in the form of stretched and retouched yarns to withstand practical use. The mechanical properties to be obtained are also sufficiently expressed as 1-[■
] can be expressed as (!l).

The cross-sectional shape of each filament 1~ is shown in FIG. 2, but
Even if the cross-sectional shape is flat, there are four parts (X) that fall into the filament cross-section shown in the m2 diagram.

There are filaments with a shape without x′).

In a multifilament in which the number of ficimene 1- having such a cross-sectional shape is small, the L of the present invention
The objective can be fully achieved.

In order to use the multifilament obtained according to the present invention for clothing, the denier of ficimen 1 to 1 should be 0.5 to 8 de, particularly preferably i, o-5, 0
(le, total j'-L-le 3O-2 (10de,
It is preferable to set it to 1J (or 40 to 150 dO).

In addition, in this defense, the single-sign combination that is subject to C is actually
85 mol % or more of the medium repeating ratio is poly-1 ethylene chloride 1 horn sauce 1- which is composed of ethylene chloride 1~, and the (I'!) has a matte finish and improved dyeability.

There is no problem in combining or blending each 1-1 additive substance such as antistatic.
Look 1-] Measured in Luno I Nord) f, 0.45
~1.20! IF, J: b <, Ministry, Explosion J0.5
0.~1.00 is preferable. Limited viscosity 0.45
The following is the strong I of Maru L Finment that is lrJ
The α level is 3.3L, the ultimate viscosity +! When r exceeds 1.20, the melt viscosity II during spinning is
/J

Furthermore, it goes without saying that the melt spinning apparatus used in this invention is a commonly used apparatus.

(Sakukawa) Conventional pulsing\Fun 117/, T-th spinning 1
−． 1 The discharge hole is 1 (1 outlet surface (CI is 5゛)
A pair of rivers 1i JL or A) The angle is set in one direction [If the angle is narrow, the branch drilling of the polymer conduit hole of the 111 outlet hole with small Tagawa IDi area) will increase the discharge cross-sectional area. The larger discharge hole is shorter than the polygon (7), which is longer than the run (1), and has a fixed length of 19 (-C).

With this setting, the flow velocity of the polymer flow discharged from the discharge hole having a small area of the C1 discharge 11i is faster than that of the polymer flow discharged from the other discharge holes.

In this way, you can control the flow velocity difference! A pair of polymer streams are spun.
j Metal surface straight - F T" lii -1 L in the cross-sectional direction and longitudinal direction to Neulamme 1 in order to join while protruding and vibrating
・It is 14゛ to reduce the shrinkage difference of

However, since the contraction force of the pulsing applied in the above-mentioned manner is insufficient, the filament obtained by adjusting the contraction force in the cross-sectional direction to 1 to 1) and adjusting the difference in the Tagawa cross-sectional area to 1) The cross section on the high orientation side of -
J LjL/ 'l is b no deru! Therefore, it is difficult to increase the flow rate difference as X of 1 becomes larger, and the limit is reached by a pair of discharge holes that take 4° to become II.

, I/This, by increasing the vibration according to the preamble of the merging flow of both cars, I tried to check the thickness irregularities in the longitudinal direction of the Neuline I1~ (
However, if the distance between the two holes is increased, the vibration will decrease or even disappear.

In contrast, the manufacturing method and spinning of multifilament 1 of the present invention [-1 gold with d3 U4;t, as shown in FIG.
In order to adopt gold,
5 vibrations due to the 'txl bumps and pounds of the polymer flow, and the hollow discharge hole. 71 If the binding is C, the length of the filament is small in the longitudinal direction, and the cross section of the filament is A3, as shown in Figure 2, and the degree of orientation on the q side is higher than on the h side. A filament 1 consisting of filaments having a difference in degree of orientation in the direction is obtained.

By adjusting the diameters of the slits in the plurality of slits constituting the hollow discharge hole and the diameter of the discharge hole, etc.
The fh polymer stream 111 discharged from such a pair of 111 outlet holes) *It is possible to sufficiently manage the difference (K) 1゜For this reason, the spinning troughs 1 to 111 are discharged from the hollow 1jl outlet C. It is possible to concentrate the polymer flow in the hollow 111 outlet h''') and discharge the IC polymer flow by shearing the IC polymer stream. It is possible to obtain a degree of orientation that is higher than the degree of orientation of the hollow portion, and is lower than the degree of orientation when the hollow portion is solid.

But inside? and the sum η of the plurality of sulins 1~ constituting the discharge hole
Since the surface of one discharge point is five times larger than the discharge cross-sectional area of the upper discharge hole, the cross-sectional area of the hollow part of the hollow part (Jdi) is larger than the cross-sectional area of the hollow part (Jdi).

In addition, since the button head between both holes is set to η, the sleeves 1 to (both holes are connected, so the combined flow of both cars generates vibrations in the button head 4 due to collision and bouncing [while joining t !Can be reduced.

You can get it like this! Rudifilamen 1 ~ 4111
In the cross-section of A, the hollow part has a larger cross-sectional area than the solid part, and the degree of orientation of the hollow part is extremely strong, so that the hollow part is the solid part J, and has an extremely large contraction. In addition to having a large thickness unevenness in the longitudinal direction of the fitment, multifilamen 1 made of such a fitment has a large shrinkage between the filaments and within the filament 1. This makes it possible to quickly generate a large shrinkage force during heat treatment.

Fabrics using such multifilaments can be heat treated uniformly and with sufficient bulk. I can do J-things. In addition, multifilamen 1-1, which is a mechanical 1-f bamboo that can be used practically by further drawing and heat-setting the undrawn yarn obtained by melt spinning, still has a sufficient shrinkage difference. Therefore, fabrics using such multifilaments can also exhibit sufficient bulk through heat treatment.

Furthermore, in the present invention, if the discharge hole shown in Figure 1 in which the hollow discharge hole slots are arranged in a triangular shape is used, the cross-sectional shape of the resulting fillan l- will be as small as shown in Figure 2. The multifilament made of such a filament can exhibit a unique luster.

The filaments constituting the multifilaments 1 to 11 in the present invention have a large thickness JAI in the longitudinal direction.
It is also possible to exhibit a nice stiff texture like that of a mixed fiber yarn made of R-fibers, which are made of different denier filaments.

(Effect of the invention) The multifilamen 1 to 1q produced in the present invention is simply subjected to heat treatment /Il! i? Since it exhibits a large bulkiness at J or more, it can be handled in a flat A-earn state at machine IM or I, which provides good process passability.

In addition, it is possible to make a monopolymer without undergoing any complicated operations.
Therefore, its industrial significance is extremely large.

(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 following method.

(1) For arbitrary cross-sections of n+, m+, and +12, m2 multifilament, take the cross section of C1560 section and take the true shape of the cross-section, and make the hollow part G-section and the long-sleeve filament cross-section where the top is W-person. (01) and the best straight line (m+)
, and the long sleeve (+12) and maximum straight line ITh (m, +) of the cross section of Meilamen 1 whose cross-sectional area is Ia small were measured, respectively.

(2) Maximum stress II! Rirutogi Shin 1 Ryo (1-2)
and I4 final elongation at break (Ll) in a normal tensile tester at 25°C in humid air and 60% humidity.
The sample length was 10 cm, and the pulling speed was 200 mm/mm.
A stress-elongation curve was drawn for the strip 1'1, and the elongation 11i (+, 2) at which the stress was maximum and the elongation at which the stress became zero were defined as the final fracture IIJi elongation (ly+).

(23) Shrinkage rate Make a multifilament ``kahi'' and apply a load equivalent to 2.5111 g/d to this ``kahi'' (), 12 +
The shrinkage rate when subjected to dry heat treatment at 1° C. for 5 minutes was calculated from the following formula.

1(su()-91)/so:l x 100 (%)-
Shrinkage rate (%) (fLo: length of “)Jza” before treatment)
(!11 Length of “Kari” with two treatments and one kill) (13)
Texture (also λ'H) The obtained latent bulky multifilament was knitted into a cylinder, dyed using conventional method C using dispersion dyeing agent 1, washed with water and dried, and then
Set it for 1 minute at ℃0 and the texture is high 1! 'l+ feeling) was used as a sample for evaluation. The texture (bulky feeling) was rated I (R eye observation and tactile sensation J, C).

“Example-1” Polyethylene terrestrial resin with intrinsic viscosity [η] of 0.64
After melting 1- (containing 0.3 in.% of -r'to2 as a matting agent), the temperature was further raised to 300°C, and the temperature was increased to 300°C.
The liquid was discharged from the discharge hole at a discharge rate of 37.5''; i /min.

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

(Left below) Table 1 33. π(S Δ2/2>2 (more than margin) 11 outlet holes) Koi (, hollow outlet hole and 1) 1-
The discharge amount ratio and the 11 discharge speed m ratio of polydehylene terephthalate 1 to 1 (hereinafter referred to as 1 L) discharged from the 01 outlet (2) are -1/1.7 and 1/3, respectively. It was 3.

Then, on one side of the wide combined flow discharged from the hollow outlet with the spinneret straight ten, the 31 combined flow discharged from the single discharge hole (2) joins with heavy weight/pound.

Next, a cold IJI wind with a temperature of 26°C and a humidity of 60% was blown onto the joined P [1st stream] at a linear velocity of 30 cm/sec.
After cooling and solidifying, apply the oil agent with A-Iring [J-Lar 4:J! −
j L"C to take-up speed 450 (rolling up at 1 m/mm) - U 75 de/ 36 fi l Marbune Iramen 1- 1 (1 k.

The filaments constituting the Malp filaments 1 to 1 have a single cross-sectional shape as shown in FIG. The Worcester's spot of this Nultifilamen 1 is a human 4f as shown in Figure 4(a).

Then, the obtained multifilament [with respect to -, the area of the filament 1 to 11 which is d5 on its idle cross section]1
Ratio of person and minimum value (n+Xl1l+/n2Xm2), 4
In one part? The cross-sectional area S11 ratio (S/3h), stress-elongation curve, and light object 1'1 of the area including part <e> were measured and shown in Table 2. .

(The following is a blank space) Table 2 (The above is a blank space) Since 1-2 of this multifilament has a low value of 75%, it can be put to practical use as it is without further drawing heat setting.

For this purpose, the multifilament was knitted into a tube and dyed with a disperse dye under C1 below thread 111.

[Dyeing (3 dyeing 1 dyeing $4: Polycstcr E astma
nB stitch 10 dyeing ratio: 4% based on the tube knitting weight Auxiliary agent: monogen (0.5%/fl) Bath ratio: 1/100 Temperature x time: 100°C x 60 minutes The dyed sample was washed with water, After drying, it was heated at 180° C. for 1 minute.

Do it like this! The sample was uniform and had good dyeing ↑1, and the texture was firm and had a bulky feel similar to that of the sample using ordinary woolly yarn.

This results in large shrinkage differences between the filaments of such multifilaments and within the ficimen 1.
This shows that the multifilament made of these filaments has a large contractile force.

[Example-2] The undrawn yarn was spun in the same manner as in Example-1 except for I at a take-up speed of 3000 m/min. Next, the undrawn yarn was preheated and stretched while being passed through the heater. C. Stretching and heat setting, which is carried out after heat setting, is carried out in the following row A'1,
A multifilament of 75 dc/36 fi l was obtained.

[Stretching heat [T1~conditions] Preheating temperature 80℃ Heat set temperature 180℃ (slip] - heater temperature) Stretching ratio 1.4 Stretched Daruma 500m/min The properties of this multifilament 1- are shown in Table 3.

(Hereinafter in the margin) Table 3 (Hereinafter in the margin) As described above, the multifilament produced according to the present invention still shows a large shrinkage difference after being subjected to drawing heat curing.

Then, the i:51 knit using this multifilament was dyed under the same dyeing strip A'1 as in Example-1,
As a result of evaluating the dyeing of the obtained sample (1 g) and the bulkiness, it was found that it was uniform and had good dyeing properties, and it was similar to normal woolly.
It had the same bulky feel as the sample using yarn.

In addition, the heat-letting polishing was performed in the fourth stage in the stretching heat setting conditions.
Bulky I of multifilament obtained by changing as shown in the table
Evaluation was carried out in the same manner as in Example-1.The results are shown in Table 4.

(Margins below) Table 4 ○: Satisfied with the 15I bulkiness, although inferior to the standard (2-handed margins) In this way, according to the present invention, the boiling water shrinkage due to the stretching heat retouching 1- Increase the ratio to 20'.
,! Shii! It is something to do. This indicates that the multifilament obtained in the present invention has a thick contraction difference of 41 between the filaments and within the neurilament, and this filament has a strong convergence force. I feel lazy.

U Comparative Example-1] Polysoil Blend with an ultimate viscosity of 110.64
A gloss d'j agent (containing 0.3% TlO2) was melted and heated to 300°C, and was prepared using JP-A-55-5180.
9 sill publication (US Pat. No. 4,332,757 and US Pat. No. 1 No. 4,349,604), a discharge line of 37.!i9/min was discharged from the discharge hole described in US Pat. No. 4,332,757 and US Pat. .

This Tagawa hole has a hole diameter of 0.1! imm, land length 0.3
A round hole (1) with a diameter of 0 mm and a round hole (2) with a hole diameter of 0.27 mm and a land diameter of 1.3 mm are arranged so that the center lines of both holes intersect with each other by 5° r. - It is set up so that

Well, the limit is that these round holes (1), round holes (2), which Tagawa volume ratio and 11j output speed reduction are 1.9 and 1.6.

11 discharged from this discharge hole [) [- ■ The flow is spinning [] Gold self-weight white and discharged from the round hole (1) 1) To 1-Nagare ga Makii”
While colliding and vibrating, 418 hits. Subsequently, the joined 1〕131 flow was cold IJI L, 30 as in the actual flow example-2.
00 rn, 7 minute pick-up service (C-kai). Next, this undrawn yarn was subjected to stretching heat 111 to (i) in Example-2.
(([IL, heat temperature (180°C)) (Stretching heat cera I- was applied.

Mardifilamen 1-441 made in this way
Although the filament consisting of 4 is flat, there is no hollow part, and the thickness in the longitudinal direction is uneven and small.

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

(The above is a blank space) Table 5 (The following is a blank space) The sample obtained by dyeing the tubular knit using this multifilament with the same dyeing strip as in Example-2 ('I) has very little texture and is flat. It had a paper-like texture, as if it had been stitched and dyed using A7 yarn.

This means that the shrinkage difference between the filaments and within the filament during such pulsing is small, and the shrinkage force of the multificimen 1 made of such filaments is small.

(Comparative Example-21 The same method as Comparative Example-1 was used except that the take-up speed was 4500 m/min.
/36ril multifilament 4! Jk.

Table 6: Filaments constituting the multifilament...
Although the i-plane has a flat C shape, there is no hollow part and the thickness unevenness in the longitudinal direction of the mouth is small. This Multificimen 1- for Worcester use was small as shown in Fig. 4<1)). Next, using this multifilament, a section was assembled, and the same strip ('l''c) as in Example 1 was assembled.
Even though it was dyed, it had a certain degree of bulkiness.

However, the robustness of such bulkiness is poor, and the bulkiness easily disappears when external forces such as tension are applied. This means that the likemen I.
The shrinkage difference between filaments and within the filaments is small, which means that the shrinkage force of a multifilament made of such filaments is small.

[Example 31 The multifilaments obtained in Example 1 and Comparative Example 2 were made into 3000 denier skeins, and the skeins in the mouth were reduced to 0. 2.5. j, 0. 7.5.10.15m
A heat treatment was performed under dry heat at 120°C while applying a load of y/(IC). After this heat treatment, the rapid bulkiness of the multifilament was judged with the naked eye, and the results are shown in Table 7. .

(Leaving space below) Table 7 Judgment Criteria ◎: Bulky window with a three-dimensional effect O: Lacks a three-dimensional effect, but has a thread-like appearance ×: No bulky window at all, paper-like As is clear from Table 7, the bulk of the multifilament i! It can be seen that the solidity of the pulsing lane is significantly higher than that of the conventional pulsing lane.

[Example 41] Using the discharge hole as shown in Figure 1(a), spinning and drawing heat were carried out in the same manner as Example 2 and 161, except that the 3J method for the discharge hole and the spinning take-off speed were changed to those in Table 8. 75 (I)
[! A multifilament of /36 ril was obtained. Such stretched heat cera 1 to 1 strips! 1 in Table 8 (J11!
0 In addition, Table 9 shows the state of movement of the knitting and pounding of the thousand aggregates during spinning, the absence of yarn breakage, and the properties of the resulting rujilament.
The bulky window of the sample obtained by staining the central line using Example-1 I+J 4y dyeing strip f1,000℃ also
The table shows Ω(t!).

As is clear from Tables 8 and 9, according to the present invention, it is easy to obtain multifilamen 1, which has a large contraction force within -C-Noraikun 1 and between ficimen 1 and has a large contractile force. It turns out that it can be done.

[Brief explanation of drawings]

Figure 11 is a cross-sectional view of the discharge hole of a spinneret made of wood, Figure 2 is an Iei side view of filament 1, which constitutes the multifilament obtained by employing the manufacturing method and spinneret of the present invention, and Figure 3 The figure is a cross-sectional view in the 15 longitudinal direction of the filament constituting the multifilament obtained by the present invention, and (2) and +b+ in FIG. The obtained multifilament and the conventional pulsing A7-n Worcester spot obtained in Comparative Example-2 are shown in the graphs, FIG. : The multifilament stress (Ai
- Elongation (Fl) curve, Figure 7 is a filament perspective view when the filament is cut along the cross section immediately after the polymer has been discharged from the llll exit hole in Figure 1 (a) with a freewheel. (electron micrographs) are shown. Special i' [Applicant Teijin Ltd. Figure 1 (b) a Figure 2 (cL) (b) Figure 3 Figure 4 Figure 5 Figure 6 L (1) ('b') 7 Drawing Procedure Amendment (Method) % Formula % 1. Indication of Case Patent Application No. 59-36097 No. 26 Title of Invention Method for spinning latent bulky multifilament and its spinneret 3 Person making the amendment Relationship with the case Special γ [Applicant 1-1111 (300) Minamihonmachi, Higashi-ku, Osaka City, Teijin Limited Representative Kaimoto I/1ll-I Soku Teijin Co., Ltd. Company 1-1 6/Subject of amendment fl+ Specification, page 59, No. In lines 14 to 17, "Figure 7 shows..." should be corrected as follows. [Figure 7 is a perspective view of the filament (□□□ fiber) when the filament (single fiber) is cut along the cross section immediately after the polymer is discharged in free fall from the discharge hole in Figure 1 (-) (Electron microscope photographs) All are shown. "that's all

Claims (1)

[Scope of Claims] (1) A-A - a pair of polymer streams -C discharged from a pair of discharge holes having different discharge cross-sectional areas from a spinneret with a difference in flow velocity by melting the small aggregate; Immediately below the spinneret surface, the discharge area of the pair of discharge holes is equal to the discharge hole, and the IC low-speed polymer flow is discharged.
The high-speed polymer flow discharged from the other discharge hole with a smaller discharge cross-sectional area is brought into contact with the other while avoiding collision and bounce, and then cooled
dl In the vJ manufacturing method of multifilament, which is taken up after solidification, the pair of discharge holes are connected to each other by a slit, and the discharge hole, which has a different discharge cross-sectional area, is formed with a plurality of slits 1 to form a hollow part. If the discharge hole is a hollow discharge hole, and the other discharge hole with a smaller discharge cross-sectional area is a single discharge hole, then J(
A method for producing bamboo multifilament with one hole, characterized by drawing at a speed of 2500 m/min or more. (2) Arrangement of multiple slits constituting the hollow exit hole,
and the feature h'F in which the cross-sectional shape of the single discharge hole is both circular C'.
A method for producing a latent bulky t1 mardino inome according to claim (1). (3) The method for producing a potentially bulky multifilament according to claim (1), wherein the plurality of slits constituting the hollow discharge hole are arranged in a non-circular manner. (4) A method for producing a potentially bulky multifilament i according to claim 1 or 3, wherein the plurality of ribs i constituting the hollow discharge hole are arranged in a triangular shape. . (5) A method for producing a latent bulky multifilament 1 according to claim (1), which is a spinneret consisting of a pair of discharge holes connected to each other by a slit. (6) The method for producing a potentially bulky multifilament according to claim (1) or (5), wherein the rib 1- connecting the discharge holes is single. (7) Flow velocity of the polymer flow discharged from the hollow discharge hole (■
1) and the flow rate (v
2) A method for producing latent bulky multifilamen 1 to 1 according to claim 1, wherein the flow rate satisfactorily satisfies the following formula [I]. l/1. ．． 5≦V+ / V2≦1 / 7 ...-
[i] (8) Production of the latent bulky multifilament 1- according to claim (1), by cold film + solidifying and then taking it out and winding it up, or by stretching it without winding it up once. Law. (A method for producing a latent bulky multifilament according to claim (1) in which the multifilament is wound at a speed of 914000711/min or more without being drawn and stretched. 00) Claim (1) wherein the polymer is polynisdel ) or (7), the method for producing a potentially bulky multifilament. (ITl Spinning yarn in which a pair of discharge holes with different discharge cross-sectional areas are arranged [In 1 gold, the pair of discharge holes are connected by V-tightening, and the discharge holes have a large discharge cross-sectional area. A hollow discharge hole that forms a hollow part with multiple slits,
A latent bulky multifilament spinneret characterized in that the other discharge hole with a smaller discharge cross-sectional area is a single discharge hole. (12) A latent bulky multifilament spinneret according to claim 171, wherein the arrangement of the plurality of slits constituting the hollow discharge hole and the cross-sectional shape of the single discharge hole are both circular. 03) Hollow The latent bulky multifilament spinneret according to claim 1, wherein the plurality of sulins constituting the discharge holes are arranged in a non-circular manner. 04) Claim 011 or 03) wherein the plurality of slits constituting the hollow discharge hole are arranged in a triangular shape.
Spinning of latent bulky multifilamen 1 to L1 gold as described in Section 1. 051 A spinneret C consisting of a pair of discharge holes connected to each other by a sulin 1 ~ Certain Claims (IT)
A spinneret for the potentially bulky multifilament described in Section 1. 06) Claim No. (111,
Or the latent bulky multifilament spinneret described in item 05).