JPS5959927A - Production of slub yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Small 1) Drape 14.1 with a thick A111 in the -W direction (14.1) of a light Q1° yarn (7,) This relates to a method for manufacturing a sieve slub yarn.

The slub yarn with thick #l11 applied in the 1st and hex direction of the yarn will be applied to the fabric. ri' (-yama f: Suerute (used as Yu).

For example, as a method for making slub yarn f1↑,
Publication No. 3-28258,! 1,! Komei 45-2801
Publication No. 8, Special Publication No. 50-35147 Bow Publication, ・'I! Publication No. 56-68125, Special Publication No. 51-30174-
Hako・)1n,! 1, blasphemy: [11971 148925
Many 4'jj' proposals have been made, such as the publication number. But from Kotobuki.

These proposals v, the convergence of the yarn with one turn and the core yarn are “l'j
′, l< + Misalignment of slab part:! J,', l called elephant [
fl j, 'L7 is the bending force, and in order to add 8 and 41, a high heater temperature fli', the yarn I'1 fold--for IK, for example, 230 to 240 degrees with the ester yarn, Apply J and i31 to the core yarn, and use a mixture of core yarn and wrapping yarn: Dai. A suggestion of guilt has been made.

Slub yarn by these methods? :l, both f
Due to the heat fixation in the anti-twisting heater, there is some shrinkage in the yarn. drape ゛1'1
．． is 7° (<.

I was only able to choose one with a lighter texture.

・) - TA, (Reverse 1,''; N7 with heating!&There is a proposal to form countless loops of filaments of wrapped yarn around the core yarn without fixing it, and this The phase difference hypothesis suggests that the yarn obtained by this method has a looped form.

Therefore, the resulting fabric may have protruding loops, and the thread may be defective due to the protruding loops.

There is also a phenomenon of displacement of the slab part.

In order to completely improve this, we added a first twist to the yarn with 5 turns, and the direction of the twisting yarn was opposite to the false twisting direction, and under the condition of a constant false twist number of 71. Through processing, an improvement has been made to reduce the occurrence of loops in methods that do not perform thermal identification in the temporary accent region. However, this method requires first-twisting, is expensive, and has a high cost when handling the yarn.
! (There is.

The Ministry of Invention, etc. has conducted extensive studies on this point, and as a result,
Temporary], ze;ka J:il! , in the fabric, other fiber threads (13) are added to the threads (A,) which are held together without being heat-set.
In the phase-difference false-twisting method in which all turns are applied, the generation of loops causes the untwisting action in the false-twisting/untwisting region to l[! By carrying out the process under special conditions, the cracking rate was significantly reduced, and the slab part was well fixed, which had not been possible in the past. They discovered that a slub yarn with good drapability could be produced and completed the book 71.

In other words, the wicking of this book is based on false twisting 1.
In the phase difference false twisting method in which the fiber thread (B) containing the heated optical component is over-fed to the thread (A) and wound around the thread (A) without heat fixing in the i> area, This is a method for producing slub yarn characterized by heat treatment at a temperature higher than the softening point of the fiber yarn (B) in the twisting/untwisting region.

Hereinafter, the present invention will be explained in detail with reference to the drawings.
O + reveal.

FIG. 1 shows an example of an apparatus used in an embodiment of the present invention.

In FIG. 1, the yarn (A,) is heated and untwisted by a heating device 5 installed between a white base 1 supplying roller 1 and a take-up roller 3.

At this time, a tension device may be used to replace the first supply roller. Further, the heating device may be a spindle type, a friction type, or an air pre-combustion device having a swirling flow, which is used in the normal false twisting process. On the other hand, the second supply roller 2 overfeeds the fiber yarn (B) to the exchange area and wraps it around the yarn (A). A tension change occurs in B), the winding position changes and a slab is formed. Next, the slub yarn that has been formed into a slab passes through a heating device and is subjected to a heat treatment by a heating device 6 provided in the untwisting area.
It passes through a take-up row 23 and is wound up by a take-up row 24.

2 (Adding a more detailed explanation using Table 51.

Yarn (A) is polyester 75 denier yarn, softening point 24
0°C, Fiber Koei (13) was a polyester 50 denier yarn with a softening point of 2400C, and processed using a false twisting machine as shown in Figure 1 under the conditions shown in Table 1.

It is possible to use any thermoplastic filament yarn such as ester, nylon, or acrylic filament yarn as the supply yarn.

Desirably, the yarn (B) is a heat-melting type yarn such as ester or nylon.

The yarn (A,) and the yarn ', i': (B) may be the same.

The yarn (B) may have a lower softening point than the yarn (A). In this case, the entire yarn (A) may be made of a low-softening point component, or a portion may be made of a low-softening point component, such as a mixed yarn or a conjugate yarn.

The heating number of yarn (A,) is 13,800 to 1,730 in terms of twist coefficient.
0 (however, twist coefficient = number of false twists ~ x 16% A (D
7' = -/'), the occurrence of loops and filament loop yarns is small, and more preferable conditions are a twist coefficient of 15,600 to 16,500. When the number of false twists, that is, the twist coefficient is high, the untwisted portion of the slab forming part increases in the untwisted region and concentrates in the non-slab area, but the twist equivalent that cannot be absorbed in the non-slab area is It is thought that loops and loose yarns as shown in FIG. 2(B) are generated due to the untwisting of the outermost layer. In addition, when the number of false twists is small, the twist pitch of the slab forming part is coarse, the tightening of the fiber yarn (B) to the yarn (A) is weak, the degree of fixation of the slab is weak, and the slab effect is weak. I can only get it.

Next, the processing tension of the yarn during processing is 0.2 to 0.4 P/d in the part immediately after the first supply roller of the yarn (A) and where the fiber yarn (B) is not wound. (However, d is the de of yarn A,
(neel) is the most preferable condition in terms of slab fixation, loop formation, and cutting thread generation during processing.

The winding tension of the fiber thread (B) onto the thread (A) is preferably 1 g or less and the tension fluctuates.

41k #fu yarn Ij The feed rate of (B) to the yarn (A) is the horizontal 1゛11〆1'' between the guide 7 and the yarn (A), and the formed torture slab l'/B. Although it is appropriately selected depending on the length, processing stability, etc., it is preferable to carry out actual M!i at an overfeed rate of 20% or more.

Next, the yarn with the slab formed passes through a heating device to an untwisting area, and the greatest feature of the present invention is that the untwisting action is performed under special conditions in the untwisting area. It is. That is, in the untwisting area, a heating device is provided in the untwisting area, and simultaneously with the untwisting, heat treatment is performed at a temperature equal to or higher than the softening point temperature of the fiber yarn (B).

As shown in Table 1, if heat treatment is not performed in the untwisting range, even in the false twisting coefficient range, the resulting processed yarn will be as shown in Figure 2 (B). Similarly, the filament yarns of the outermost layer (third wrapped yarn) of the slab section are twisted in the F+ direction and intertwined with each other, resulting in loops and loose yarns. At the end of the slab portion toward the core yarn (A), the degree of tightening to the core yarn (A) is weakened due to the twisting of the winding yarn. This causes misalignment of the slab head, and most loops,
A lot of loose yarns are generated, and the yarns are intertwined with each other, resulting in poor yarn shape and weak fixation of the slab portion.

In addition, even if heat treatment is performed after the untwisting region; that is, heat treatment is performed in the second heater region of the conventional false-twisting method, the yarn shape once formed cannot be improved, and the filament The loop only becomes slightly shorter as it shrinks, and the effect of fixing the slab cannot be expected to be that great.

On the other hand, as in the present invention, by heating the slab yarn t formed of an appropriate number of false twists p+2 at the same time as untwisting, loops occur as shown in Figure 2 (A). The head of the slab is wrapped around the head of the slab in the form of a highly twisted covering, and the slab has a strong degree of fixation. As a result, a sushibu-style fabric with good drape properties is used. Furthermore, it is also possible to impart a crunchy texture by controlling the heat treatment temperature.

Although it is not clear about the effect of applying heat treatment at the same time as this untwisting, it is possible to
The yarn is formed into a slab at room temperature, passes through a heating device, and enters the untwisting area.

At this time, the Young's modulus of the slab yarn is large, and on the other hand,
The Young's modulus of the slub yarn in the heating device provided in the untwisting region is smaller than that of the yarn in the heating device, and the Young's modulus immediately below the heating device is different from that inside the heating device.

Moreover, the Young's modulus of the non-slab part is the lowest than that of the neck part, and in this way, within the untwisting area, the Young's modulus of the yarn is different in the L (longitudinal direction), and the Young's modulus of the yarn is different in the direction of Due to the presence of yarn r'rIX with a small Young's modulus in a direction close to Since the Young's modulus is the smallest in the non-slab area and the thread denier is the smallest, we believe that the M twist is concentrated in this non-slab area.As a result,
Normally, the 2.1 twist of the slab part is not untwisted directly under the heating device, that is, at the same time as it passes through the heating device, but the untwisting is concentrated in the non-slab part, and the non-slab part becomes untwisted. The first time when the saturation of.

The amount of twist concentrated in the non-slab area slightly untwists the outermost layer of the slab area, starting from the butt part of the slab area. This 9. A strong twist covering shape in the direction of false twist heating remains at the head of the '1 fruit slab. On the other hand, if the untwisting point is directly below the heating device, that is, if there is no heating device in the untwisting area, the outermost layer of yarn is unwound from the head of the slab section that comes directly under the heating device. Because of the twisting, no strong twist covering shape remains in the false twist heating direction at the head of the slab, and it is thought that the shape becomes entangled with filaments.

Furthermore, in the present invention, from the heating device 6 to the take-up roller 3, no guides are used to stop the ballooning of the yarn that occurs due to the untwisting action, so that the ballooning naturally occurs within the heating device. The shape of the slab will be more stable if the slab is run in a state where the heating device is of a non-contact type.

Furthermore, by heat-treating the yarn at a temperature higher than the softening point of the fiber yarn (B) using the heating device fffi, a slab-yarn with even fewer loops and a good slab fixation degree can be obtained.

As stated above, the slub yarn*VV obtained by the method of the present invention is heat-treated in a conventional heating range (to achieve drape properties that cannot be obtained with slub yarn that equalizes crimp). The fabric becomes solid and the solidity of the slab is strong and stable even after the subsequent process (outside).

1. Even in the yarn obtained by the slub yarn manufacturing method that has been subjected to melt heat treatment in the 44H range since U, the non-slub portion is fat-twisted and further twisted in the untwisting direction. Thread shape 7j,
1. '', so the non-slub portion becomes a yarn with crimps, which has lower drape properties than the yarn of the 1'in'i invention. 1?! We were able to efficiently produce an ideal slub yarn with a good slub shape and very strong slub fixation, which was previously not possible. .

Margin below Table 1 Hereinafter, practical examples of the present invention will be shown.

Example 1 Polyester 75d/36f (softening point 240°C)
Polyester 50 to yarn (A,) and (-1 yarn east (B)
d/24f (softening point 240°C)'f: Using the processing machine shown in Figure 1, processing speed (take-up roller speed) 60 m/min, number of false twists 1820'r/M (Z), yarn (B) (1) 7
Processing was carried out at a rate of 1100%, t, < -feed, the tension of the yarn (A) during processing was 30r, and the temperature of the heating device installed in the untwisting area was 245°C.
It's li L. As a result, the obtained slub yarn had an average length of 9 tYn s M size and about 16 ctn.
The smallest one was 3 cm. The length of the non-slab part is on average 12 cm, maximum 25 cnt, minimum Icm,
Generation of slab (1 dust); 4 to 6 pieces were generated per 11 m.

Slab\Shell part t1:+'s As shown in Figure 2 (A,) (
〉jl, U, '+j twist covering ゛1) There is C and the strength': 2) The length of the covering part is ], cm or more, and both threads (A, ) and (B) are part filament j; i', l! %"+ was generated, the slub fixation was strong, and a slub yarn with very few loops was obtained.

When the obtained slub yarn was woven using a warp,
There is no problem of slippage of the slab during weaving, and since the slab yarn does not contain any false twist crimp, it has very good weaving, moderate crispness, and dryness. A slub yarn fabric with touch was obtained.

Furthermore, by applying alkali reduction Jj1 to the fabric, a slab fabric with a silky texture was obtained.

Example 2 Polyester 75d/36f (softening point 210°C) was used as yarn (A), and polyester xood/7 was used as yarn (B)
Processing was carried out under the same conditions as in Example 1, except that 2f (softening point: 240° C.) was used and the feed rate of yarn (B) was 130%.

The obtained yarn had an average length of 1.13 crn of the slab.

The average length of the non-slab part is 19 crn and 3-4 per ITL.
A slab is generated, and the slab part has a high degree of fixation.
The dyed fabric woven using this yarn has excellent drapability and a noticeable slub effect./Is there a hemp-like slub fabric with a strong sharp feel? I was beaten.

Normally, when the wrapping yarn has a larger denier than the core yarn, there is a problem that the slub form is poor, loops occur, and the degree of fixation of the slab becomes υ. Even though the denier of the core yarn is emphasized, it is still difficult to process.

[Brief explanation of the drawing]

? j') Figure 1 shows an example of an apparatus used in an embodiment of the present invention. FIG. 2 (A) shows the slab yarn obtained by the present invention, (I
3) is a slub yarn made by another method. A... Yarn, B... Fiber yarn, 1. ...First
Supply roller, 2... Second supply roller, 3...
Take-up roller, 4... Winding roller, 5... Heating device d, 6... Heating device a17... Guide, 8.
... core thread, 9... winding thread, lO... slab part outermost layer thread, 11... slab head, 12...
Slab bottom part, 13... Core thread, 14... Wound thread, 15... Slab head, 16... Loose fluff,
17... Loose yarn, S... Slab part:, 11
Figure 8

Claims (1)

[Claims] False twist J4. A fiber '1' [yarn (13)] containing the same or a higher softening point component on the side of the yarn (A) is added to the heated yarn (A) without having to be heat-set in heat. In the phase difference false twisting method in which the yarn (A) is wrapped while being buffed, the yarn (A) is heated at a temperature higher than the softening point temperature of the yarn (8). What to do f: “Inside the characteristic slub yarn”!, i-near method