JPH0226943A - Composite textured yarn and production thereof - 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 (Field of the Invention) The present invention relates to an improvement in a composite textured yarn formed by simultaneous false twisting of polyester yarns having different elongations.

(Prior technology) By simultaneously false-twisting polyester yarns with different elongations, the yarns with high elongation and easy to stretch are located at the outer periphery as a sheath, while the yarns with low elongation and difficult to stretch are located at the center as a core. A technique for forming a spun-like composite two-layer structure yarn located in the center is already known (Japanese Patent Publication No. 59-39526).
.

However, with this method, although the yarn has a two-layer structure with core and sheath concentric circles as shown in Figure 1 (a), there is no binding force between the core yarn and sheath yarn, so the yarn is not pulled in the longitudinal direction. Then, the sheath thread easily slides on the core thread, and is likely to be twisted into a thread shape with uneven thickness as shown in Figure 1 [0].

Therefore, the yarn requires great care when handling, and the quality of the finished product is poor because the sheath moves.

In order to improve this drawback, a technique was devised in which the core yarn and sheath yarn were intertwined in advance and then false-twisted (Japanese Patent Publication No. 61-1
No. 9733), by forming a two-layer structure while tightly binding the core yarn and sheath yarn, the above-mentioned problems in handling and product quality were completely solved. However, if interlacing is performed before false twisting as proposed in this proposal, the yarn structure will be relatively tight, so it is especially suitable for high bulky fabrics or flexible fabrics, except for those with stiff fabrics. In that case, it was not enough.

On the other hand, a technique (Japanese Patent Publication No. 59-21970) has been devised in which a false-twisted two-layer structure yarn is formed and then intertwined. According to this technique, the above-mentioned hardness problem is unlikely to occur, but Since air is blown over the sheath threads that wrap around the outer periphery of the two-layer structure, it is not possible to apply sufficient air to the contact points between the core and sheath parts that are to be intertwined, and no strong binding force can be expected from pre-entangling.

In addition to this, there is also a technique that fuses and binds the core thread and sheath thread, but in this case, the fusing results in a rough texture, resulting in a product that is extremely different, making it useless.

In this way, the elongation composite false-twisted multilayer structure completely satisfies the elements of having a soft and bulky texture and the elements of well-restricted core and sheath yarns and no pickling. There was no such thing as processed yarn.

Furthermore, the equity [153-12615 @ publication describes that two or more of the threads, each of which is formed by winding the thread around the core thread in an alternately twisted form, are rotated to have both a false twisting effect and a rubbing-raising effect. A composite yarn has been proposed in which constituent single fibers are broken and the broken single fibers between threads are partially twisted together by rolling the thread on a rough surface and running in contact with it. However, as shown in Figure 4, in this composite yarn, the two core yarns exist in a substantially parallel state with a space between them, and both are only fixed with fluff. However, the composite yarn as a whole did not have "softness" and was still unsatisfactory in terms of flexibility and high bulk.

(Object of the Invention) The object of the present invention is to provide a polyester differential elongation composite false-twisted multilayer structure yarn which has an extremely soft texture and high bulkiness, and which is well constrained between the core and sheath yarns and is very easy to handle. Our goal is to provide the following.

(Structure 9 of the invention) That is, the present invention provides the following features: (1) Two or more independent continuous polyester yarns are arranged in the core part, and the sheath part has a polyester yarn having a higher elongation than the yarns. In addition, polyester continuous yarn having a low degree of orientation is arranged, in which case a) the core yarn has intermittent fixed parts that are fixed to each other in the longitudinal direction, and b) other than the fixed parts mentioned above At point c, the distance between the core yarns constantly changes, and on the other hand, the single fibers constituting the yarn in the sheath section are wrapped around the core section in a random arrangement without forming fluff. A composite processed yarn characterized in that a portion of the yarn is sandwiched between yarns in the core, and two or more continuous polyester filament yarns whose elongations differ by at least 60% are simultaneously heated. - Heat treatment - Untwisting to obtain a core-sheath multilayer structure yarn, and passing two or more of these multilayer structure yarns together through the same turbulent flow nozzle, mainly by intertwining the sheath fibers with each other, which improves the resistance to straining. Provided is a method for producing a polyester composite processed yarn, which is characterized in that the yarn has a multilayer structure in which the yarn has a weight of 10 g or more and is hard to slip between the core and sheath.

The present invention will be explained in detail using more specific examples. FIG. 2 (A) is a preferred process diagram for producing the composite textured yarn of the present invention, in which a low-speed spun high-elongation, low-orientation undrawn yarn (1) and a high-speed spun low-elongation, high-orientation yarn (1) are shown. Undrawn yarn (2
) is fed to the same feed roller (3) and false-twisted using a heater (4) and a false-twisting device (5). As a result, a two-layered false twisted yarn (7) is formed in which (1) surrounds (2) due to the difference in elongation between (1) and (2). Similarly, the high elongation, low orientation undrawn yarn (1') is also formed from the low elongation, highly oriented undrawn yarn (2') into a double-layered false twisted yarn (7').

Next, these two threads (7) (7') are passed together through an air turbulence nozzle (8) to mutually twirl, and then delivered.
It passes through a roller (9) and is wound up into a winder (10).

Figure 3 (A) and (O) are side and cross-sectional views of the composite processed yarn obtained in this way, in which the fibers (1) (1') on the winding side (high elongation side) are mainly attached to each other. The core steel (
It has a structure in which the threads (2) (2') on the low elongation side exist independently inside.

Comparing this with the case where the conventional two-layered false twisted yarn (7") is passed through the air turbulence nozzle (8") alone as shown in Figure 1 (B), it is found that If so, please refer to Figure 3 Q→)
As shown in the figure, the compressed air from the turbulent flow nozzle is blown exclusively onto the fibers (1") on the winding side (high elongation side), so the fibers themselves are agitated, but the air flow blows against the core steel (low elongation side) inside. msi on the elongation side), so it is difficult to cause twisting between (1") and (2").Therefore, when the yarn is squeezed during processes such as twisting and weaving, the two easily become misaligned. .

On the other hand, in the case of FIG. 3 (A) (0) showing an example of the present invention, only the surface-wound fibers 11 (
1) (1') and the core 11i! 1 (2) (2'
Although there is no confounding between ), the resistance value to straining is significantly different from that of (/suni).

Here, as shown in Figure (E), two core threads (2) (2'
) is the distance between (a), generally this distance (a)
is not always constant as (a") (a") (a"').Here, alN is the stuck part, which separates into 2.2' of each core thread even if it is strongly squeezed by hand. When the wound fibers (1) (1') are tightened in the longitudinal direction of the yarn, this distance (a) must change, but the wound fibers 11!(1) (1') Since comrades admire each other, their forms do not change easily.

Therefore, when the wound fibers slide smoothly over the core yarn, a certain amount of resistance is generated. Even if this resistance is not very large, there is a big difference between having even a little bit of it and not having it at all. That is, the straining tension applied during twisting or weaving is at most 109 to several 109, and whether or not the textured yarn can withstand this is the difference between whether or not the processed yarn can withstand use.

For example, in conventional single processing, the yarn shifts and becomes a slab or nep even when 10 g of ironing is applied, whereas the yarn of the present invention can withstand 10 g or more of several tens of g of ironing.

Once it withstands this kind of straining and becomes a twisted yarn or fabric, the binding force due to its structure is further applied, so it will no longer shift even when a very large force is applied. Above all,
Particularly effective is when using additional twisting. By twisting this yarn, the two core yarns (2) (2') shown in Figure 3 (A) (○) are created between them. The m1ll that is stuck (
S) was refined and finally stopped working. If the number of twists is 80 times or more per m, a strong effect will occur.

Therefore, in this case, it is sufficient that the yarn can at least withstand the straining required until it is twisted.

On the other hand, in the case of individual processing, the twisted yarn cannot withstand the straining tension, and even if the yarn is twisted, such tightening h does not work, and the area around the core fiber (2") of If the fibers (1") are wound around the fiber, the conjugation strength will not improve.

In other words, the difference is simply whether one 21-layer false-twisted yarn is passed through one nozzle or two two-layer false-twisted yarns are passed through one nozzle, but the effect on ironing is unpredictably different.

Regarding the nozzles used for turbulent flow processing, a so-called interlaced nozzle 8', which blows compressed air perpendicularly to the yarn, is generally used to spool the yarn, as shown in FIG. 4(a). Of course, this nozzle may be used, but in this case, there is a drawback that the obtained composite yarn is intermittently changed as shown in the figure.

In addition, as shown in Figure (b), the so-called taslan processing loop 8'' is also used for turbulent flow treatment, but as shown in this figure, although many loops occur, it has the disadvantage that the reeling force is not very large. In the case of the present invention, it is preferable to have a special injection angle θ as shown in (Yes), that is,
It is not 90 degrees like interlace, nor is it 15 to 30 degrees like taslan, which is effective for applying strong thrust to the yarn and shifting the fibers to create loops. An angle of about 35 degrees to 70 degrees, especially 40 degrees, so that it imparts light but not intermittently.
It is desirable to have an angle θ of about 50 degrees to 50 degrees.

Furthermore, the thread that has come out of the nozzle is placed on the collision plate 9 as shown in the figure.
If you further increase the entanglement and take it out, it will be more effective.

Regarding the supply state of yarn when air processing is performed, in so-called interlace processing, processing is normally carried out in an OF state of at most about 2% from a fixed length. In addition, in so-called taslan processing, a loop is created by processing with a large OF rate (relaxation rate) of 20% or more, but in the case of the present invention, the OF rate (relaxation rate) is 5% to 15%, which is neither of these, due to the structure of the nozzle. If carried out under a moderate overfeed state, it is effective for successfully twisting the two layers of false twisted yarn together. In addition, even if high pressure such as 6 to 10 Kg/ci is used, in addition to the normally used 2 to 5 Kg/cd, there is no fear of severe loops or intermittent tight spots, and the yarn is thinner. is obtained.

The material used in the present invention is one that is easy to process.

Polyester mN is used in consideration of the texture of the finished product, the cost of raw materials, etc. The difference in elongation of the raw yarns for forming a two-layered yarn by false twisting is preferably at least 60% or more, particularly 100% or more.

That is, the undrawn yarn on the low elongation side has an orientation degree of 0.025 or more and an elongation of 200, which is spun at a high speed of 2500 m / sin or more.
% or less is suitable, and the high elongation side is at least 60% higher elongation than this, for example 2000 m / ak.
Elongation of 260% or more, orientation degree 0, spun at a low speed of in or less
．． Lowly oriented undrawn yarn of 018 or less is suitable.

In addition, as a method for measuring the degree of straining, a washer tensor with a diameter of 3 cmφ is used, and the weight applied to the washer is adjusted to adjust the tension applied to the thread passing through the washer. It is expressed by the tension applied to the thread when the sheath shifts and begins to slide.

(Example) Example 1 220D/spun at a speed of 1100 m/sin
36F.

Low-orientation undrawn polyester yarn with an elongation of 350% and an orientation degree of o and ooa, and a high-orientation undrawn polyester yarn with an elongation of 130% and an orientation degree of 0.04 of 225D/30F spun at a speed of 3400 m/Win. Align the threads together, 170℃
By stretching and false-twisting this using a heater and a three-wheeled disk friction false-twisting device at a processing speed of 400 m/Sin and a stretching ratio of 1.6 times, it becomes 280D/Sin.
A 66F core-sheath 211 structural yarn was obtained.

Subsequently, two such two-layer structured yarns were put together and passed through an air nozzle with a spray angle of 45 degrees, and the result was a stiffening process with 10% overfeed. A composite yarn having two independent core yarns with an ironing degree of 409 was obtained.

Next, when this yarn was twisted 130 times per m, the yarn progressed smoothly without being strained at all during the twisting process, and after being twisted, the yarn became even stronger against straining, making it suitable for weaving. No matter how I was treated at the time, I had no problems. In addition, the fabric was extremely bulky and extremely soft, unlike anything seen before, and had excellent heat retention, and it felt very light to wear despite being made of thick material.

Incidentally, Figure 5 shows a comparison of its bulkiness with conventional processed yarns and spun yarns. The horizontal axis is the basis weight of the fabric, and the vertical axis is the bulkiness of the fabric. ◎ in the figure indicates the bulkiness when the yarn of the above example was woven into pine trill, and it can be seen that it has significantly higher bulkiness than conventional spun yarn as well as processed yarn. Other O marks in the frame of the present invention are other examples of the present invention made by changing the structure, material composition, etc., and Figure 6 shows the contact thermal sensation (touching) of the ◎ mark fabric. Figure 7 also shows the characteristic values of thermal resistance (how much heat is transferred over a long period of time). This shows that the fabric of the present invention is also excellent in terms of heat retention. In addition, the composite textured yarn of the present invention has a very soft texture and feels very light when worn despite being made of thick material, making it extremely preferable for use in cold-weather clothing.

Example 2 The composite textured yarn obtained in Example 1 had an eo of 800 times per m.
For oDe, strong twisting was applied. In other words, even though conventional false-twisted two-layer structure yarn has a span-like structure 1 with two core-sheath layers in its untwisted state, when it is strongly twisted, the two-layer structure becomes tight and the span becomes distorted. Although lighter texture is significantly reduced, the sheath yarn of the yarn of the present invention has very little bulkiness, so even if twisted a little strongly, the core-sheath structure remains, and the floating effect of the sheath fibers is not lost, creating a spun-like texture. is retained. Therefore, a fabric woven into a coarse plain weave by subjecting this yarn to strong twisting is given waist resilience and a smooth touch due to the strong twisting, and the fabric surface has a rough spun touch and appearance despite the strong twisting. It has been well maintained and has become an excellent casual product with circular needles. This effect can be obtained when the yarn length is 1T, when the yarn denier is D.
5000/(obtained when strong twisting is applied 5 times or more to rL).

Example 3 The yarn obtained in Example 1 was twisted 100 times per m to form the warp yarn, and the weft yarn was used without twisting to create a moquette for a car seat using a double loom.

This moquette is very bulky, so it is light despite its volume, making it a car seat suitable for improving the fuel ratio by reducing the weight of vehicles.

Example 4 Similar to Example 1, both the undrawn yarn and semi-drawn yarn of the raw material were yarns using polyester homopolymer, and the semi-drawn yarn was made of polyester homopolymer, but one of the undrawn yarns was S.
One yarn uses a cationically dyeable polymer containing an O3Na group and the other does not contain this, and the semi-drawn yarn is a polyester homopolymer, but the undrawn yarn is SO.
(a) Threads made of cationic dyeable polymer containing Na groups, and two composite yarns were combined and twisted 100 times per meter to give a twist of 1200 [) O
After twisting it into yarn, I mixed it into a patterned weave. When this was dyed with disperse dye and cationic dye,
A high-class, temperature-sensitive car seat with a three-color pattern was obtained by post-dying.

That is, conventional patterned car seats are mainly dyed with yarn and then woven, so-called yarn dyeing, but this has the problem of poor productivity. If the fabric is dyed using woven fabric 7, so-called piece dyeing, productivity will increase, but the pattern will be monotonous and the texture will be poor. On the other hand, with the composite processed yarn of the present invention, it is possible to finely change the deep discoloration and pale discoloration, and because multiple yarns are processed with the same nozzle, the color mix is rough, and the resulting yarn has a high bulkiness. Because it is easy to create a texture, piece-dyed fabrics can be as luxurious as piece-dyed fabrics, and when combined with the weight reduction due to high bulkiness, an extremely excellent car seat can be obtained. things are possible.

As is clear from the above, the present invention is based on claim (1).
) and (3), respectively, with respect to claim (1), which is characterized by the following aspects: (ω Only one of the two multilayered yarns to be combined contains ionically dyeable polyester, and the other does not. The composite textured yarn according to claim (1), comprising:

Claim (1) in which both of the two multilayered yarns to be combined contain ionic dyeable polyester.
) Composite processed yarn described.

(C) Claim (1) in which the bulk height is 3 cd/g or more
Fabrics made from the composite textured yarns described.

(Small) A fabric woven by applying additional twists of at least 5000/Jn times per meter to the composite processed yarn described in claim (1) (
However, D is the denier of the composite processed yarn).

(e) A car seat fabric woven with the composite textured yarn according to claim (1).

Regarding claim (3): (f) Claim (f) characterized in that the compressed air of the turbulent nozzle is ejected along the yarn traveling direction at an angle of 35 degrees to 10 degrees with respect to the yarn traveling axis. 3) Method described.

($) The method according to claim 3, wherein the yarn ejected from the turbulent flow nozzle is hit against a collision plate to increase entanglement and then pulled out.

[Brief explanation of the drawing]

Figure 1 is a side view showing the structure of a conventional false twisted two-layer composite processed yarn, Figure 2 is a front view showing an example of an implementation process of the present invention and a conventional process example, and Figure 3 is a composite yarn of the present invention. FIG. 4 is a side sectional view showing an example of a conventional nozzle and a nozzle of the present invention. FIG. 5 is a side view and a sectional view showing the form of a conventional composite yarn. FIG. Comparison diagrams, Figures 6 and 7 are diagrams comparing the contact thermal sensation and thermal resistance characteristic values between the fabric of the present invention and the conventional fabric. In Fig. 3, 1.1'... Sheath thread 2.2'... Core thread aTn... Fixed portion.

Claims (4)

[Claims] (1) Two or more independent polyester continuous threads are arranged in the core part, and a polyester continuous thread having higher elongation and lower orientation than the threads is arranged in the sheath part. In this case, (a) the threads of the core have intermittent fixed parts that are fixed to each other in the longitudinal direction, and (b) the distance between the core threads constantly changes at locations other than the fixed parts, On the other hand, c, the single fibers constituting the threads of the sheath are wrapped around the core in a random arrangement without forming fluff, and a part of them is sandwiched between the threads of the core. Composite processed yarn characterized by: (2) The composite processed yarn according to claim (1), which has ironing resistance of 10 g or more. However, the strain resistance is measured according to the following method. Using a washer tensor with a diameter of 3 cmφ, adjust the weight applied to the washer to adjust the tension applied to the thread passing through the washer. It is expressed by the tension applied to the thread. (3) Simultaneously heating two or more polyester continuous filament yarns with elongations different by at least 60% - heat treatment -
Untwist it into a core-sheath multilayer structure yarn, pass two or more of these multilayer structure yarns together through the same turbulent nozzle, and mainly intertwine the sheath fibers with each other to achieve a straining resistance of 10 g or more. A method for producing a polyester composite processed yarn, which is characterized in that it is a multilayer structured yarn that does not easily slip between the core and sheath. (4) The method for producing a composite textured yarn according to claim (3), wherein the composite textured yarn after the interlacing treatment is twisted 80 times/m or more.