JPS59125928A - Special composite processed 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 The present invention relates to a polyester composite false-twisted interlaced yarn having a special shape and a method for producing the same. It has a spun yarn-like bulge and drapability, and has few staining spots.

By subjecting a polyester special composite false-twisted entangled yarn that can be knitted and woven at high speed and has good handling properties, and a polyester unstretched multifilament having different elongations to simultaneous stretching and false-twisting, the special composite The present invention relates to a method of manufacturing processed yarn.

In recent years, demand for polyester fiber has continued to increase.
Among these, the position that false twisted yarn occupies is becoming extremely important.

In contrast to other false-twisted yarns with similar textures and characteristics, it has become desirable to develop a false-twisted yarn with a unique texture that has not been seen before.

On the other hand, many composite plate twisted yarns have been proposed as spun yarn-like yarns. However, although these composite plate twisted yarns have a good texture, they are prone to yarn cracking, neps, yarn breakage, etc., and have poor handling properties during high-speed weaving.
Since it is a composite yarn consisting of Class S threads, it has problems such as streaks when dyed, so its evaluation in the market is unsatisfactory and it is not suitable for sewing. .

As a result of extensive studies to solve these conventional problems, the present inventors performed an entangling treatment on unstretched polyester multifilaments of the 2n class having different elongations in the presence of water, and then simultaneously stretched them. When twisted, a composite textured yarn with a unique shape is obtained, and it was discovered that this composite textured yarn solves the conventional problems and has a unique texture, and has developed the present invention. Reached.

That is, the first invention of the present application consists of two types of polyester multifilaments, all the single yarns have crimps, and the difference in the single yarn thread length of both multifilaments is 5 to 10 inches,
and a special composite processed yarn characterized by the presence of intertwined parts, spread parts, and untwisted parts randomly and intermittently in the length direction, and a method for producing this special composite processed yarn. In the second invention of this H, two types of undrawn polyester multifilaments having a breaking elongation of 100 to 250 inches and a difference in elongation of 50 to 120% are simultaneously fed at the same speed, and water is This method of producing a special composite textured yarn is characterized in that after adhesion and entanglement treatment, drawing and false twisting are performed simultaneously using frictional false twisting means. The "polyester" used in the present invention mainly refers to polyethylene terephthalate, but a part of the terephthalic acid component may be replaced with other dibasic acids, and a part of the ethylene glycol component may be replaced with other diol. It is also acceptable to replace it with

The special composite textured yarn of the present invention is composed of two types of polyester multifilaments, all of the single yarns have crimps, and the yarn foot difference between the single yarns of both multifilaments is 5 to 10 inches.

This yarn length difference needs to be 5 to 10 inches in order to give the composite textured yarn a spun yarn-like fluffiness; if it is less than 5 inches, the resulting woven or knitted fabric will have a flat, poor texture.

On the other hand, if the yarn length difference exceeds 10q6, the fabric will feel bulky and the drapability will deteriorate, which is unsuitable.

At this point, the yarn length is undone, the composite processed yarn is cut to a yarn length of 5 crn, and after being opened while being careful not to elongate the single yarn, 5 long filaments and 5 short filaments are taken.
Apply a load of 0.1 f/de to each filament,
The fiber length of the long filament (5
The fiber length of the short filament (average value of 5 points) was determined and calculated from the following formula.

Fiber length of long filament - Fiber length of burning filament Fiber length of short filament Composite processed yarn consisting of two types of multifilaments that are entangled around H and have a run difference in the length direction is prone to light splitting, reduces conjugation, and is difficult to manufacture at high speed. Although it is difficult to weave, the special composite processed yarn of the present invention has intertwined parts (a), spread parts (b), and untwisted parts (c) randomly and intermittently, so that the conjugation property is improved and the entire system is The strength of the fabric increases, the generation of unnecessarily long fuzz is prevented, and the knitting and weaving properties at high speeds are significantly improved. Furthermore, the special composite processed yarn of the present invention having such a structure has a smooth feel, is not hard as a whole, has spun yarn-like bulge and drapability, and has the effect of having fewer streaks. are doing.

In order to make wood from such special composite processed yarn, the cutting elongation must be 100 to 250 inches, and the difference in elongation must be 50 to 120%.
Two types of unstretched polyester multifilaments are supplied at the same time at the same speed, water is attached to them, the entangling process is performed, and then the stretching and false twisting are performed simultaneously using a frictional false twisting method. A 100-250% polyester undrawn multifilament can be easily spun by high speed spinning or high draft spinning. Undrawn polyester multifilament with a cutting elongation of 100 to 250 inches is suitable for high-speed false twisting, and processed yarn with relatively high temperature and crimp performance can be obtained even with a short heat setting time. As is well known. In the present invention, from among such undrawn multifilaments, two with a relatively small difference in elongation, 50 to 120%, are selected.
Seed polyester undrawn multifilament is used. If the elongation difference is out of this range, the yarn foot difference of the resulting composite processed yarn will be out of the range of 5 to 10 inches, making it impossible to obtain a woven or knitted fabric that is full and has good drape properties.

Two types of unstretched polyester multifilaments having such a difference in elongation are subjected to false twisting using an apparatus as shown in FIG. In FIG. 2, a is a polyester undrawn multifilament with a high elongation, b is a polyester undrawn multifilament with a small elongation, and guide 1
．． 1' and the guide 2, and are simultaneously fed out at the same speed by the supply roller 3. Thereafter, water of about 10 to 150 φ is applied by the water application device 4, and then entangled is applied by the entanglement treatment device 5.

The water application device 4 may be of a roller type or a dipping type.

Any conventionally known system P, such as a drip system, can be employed. In addition, the entanglement processing device 5 injects a high-speed fluid flow from a direction perpendicular to the running direction of the multifilament to excite vibration in the multifilament.
A device that imparts interlacing is suitable, and a commercially available interlace nozzle may generally be used. The number of entanglements is preferably 70 to 90 strands/ln, and it is desirable to increase the number of entanglements as much as possible within a range that does not cause yarn breakage.
- Overfeed rate between RA 6 and 0.5 to 2.5
%, and the fluid pressure of the interlace nozzle is 1.0 to 2.
．． It may be selected within the range of 5KSl/-.

In this way, after applying water to the two types of polyester unstretched multifilaments and subjecting them to an interlacing treatment, they are stretched between the #1 delivery roller 6 and the second delivery roller 9, and at the same time, False-twisting is performed by a twist set heater 7 and a friction false-twisting device 8, and then the material is passed through a guide lO, an after-oiling roller 11, and then wound up by a winding device [12]. At this time, the temperature of the twist set heater 7 is set at a temperature of 210 to 210, so that the water-adhered unstretched multifilament (b), which has a lower cutting elongation, does not fuse, and good crimp performance is obtained.
It is selected within the range of ~230°C. In addition, the stretching ratio (stretching rate) is the unstretched multifilament a with higher cutting elongation.
It is preferable that the elongation at break is within the range of (0.7 to 0.9) in order to prevent yarn breakage and streaks and to ensure that untwisted portions remain in the processed yarn. In addition, as a means of false twisting,
Frictional false twisting means must be used. The reason for this is that frictional false twisting is easy to process with relatively low tension, and twisting has yarn feeding force in addition to force, which is optimal for leaving untwisted parts in the yarn. This is because it can enhance the conjugation properties of the processed yarn and process it in a stable state. If spindle false twisting means is used, it is difficult to obtain the special composite textured yarn of the present invention. Note that setting the tension ratio (K value) before and after the frictional false twisting device 8, that is, untwisting tension/heating tension, to 1.0 or less and increasing the yarn feeding force will cause untwisted portions to remain in the processed yarn. Yes, it is preferable.

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

Example 1 Polyethylene terephthalate undrawn multifilament with a cutting elongation of 150% (225de/30 film
) and polyethylene terephthalate undrawn multifilament with a cutting elongation of 240% (225de/48 fil
s) was subjected to stretching and false twisting using the apparatus shown in FIG. 2 under the following conditions.

Supply roller 3 speed: 270 m/min 1st delivery roller 6 speed: 265 m/min 2nd delivery roller 9 speed: 400 m/min Winding speed: 395 m/min
Amount of water adhering by the water distribution device 4 is near 0 treatment path treatment device g! 5: Yarn passage hole length 3Qsm.

Yarn passing hole diameter: 4, main injection hole: diameter 2.3 Silk interlacing nozzle Interlace nozzle compressed air pressure = 1.5 KP/d Twisting set heater 7 temperature: 220°C False twisting device 8: 3-axis external friction False twisting device (ceramic cocoon - 3 Y disks/shaft) False twisting disk circumferential speed: 810 m/min False twisting tension, heating tension crab 60f Untwisting tension = 48 was obtained in the composite processed yarn, all single yarns could not be crimped. The yarn length difference between both filament components is 7%, and the textured yarn has a sense of unity with random and intermittent intertwined parts, spread parts, and S, Z untwisted parts mixed in the length direction of the processed yarn. It was a new processed yarn.

When this processed yarn was woven at high speed in a water jet loom without twisting, no trouble occurred and the yarn could be woven smoothly.

When the resulting plain woven fabric was dyed and finished using conventional methods, it had the fullness of a spun woven fabric, good tension, excellent drapability, and a smooth and supple texture, perfect for spring and summer. The material was extremely suitable for use as a clothing fabric.

Examples 2-5. Comparative Examples 1 to 5 In Example I, polyethylene terephthalate undrawn multifilament (225ds+/48f11II
) cutting elongation and spinning speed of 1,500 to 3,4007
71/min, and further changed the water adhesion rate before entangling treatment, the entangling treatment position, and the type of false twisting device, and performed gradual elongation false twisting. The morphology, conjugation properties, and performance of fabrics made of the processed yarn were evaluated.

The results are shown in the table below.

As is clear from the table, according to actual travel examples 2 to 5, which adopted conditions within the scope of the second invention of the present application.

The special composite processed yarn of the first invention of the present application is obtained, and the processed yarn has good handleability (incorporation), has a good texture when made into a woven fabric, and has few streaks. On the other hand, in Comparative Examples 1 to 5, which are outside the scope of the present invention, good results were not obtained.

[Brief explanation of drawings]

FIG. 1 is an enlarged side view showing an example of the special composite processed yarn of the present invention, and FIG. 2 is a schematic diagram showing an example of an apparatus for carrying out the method of the present invention. A: Polyester multifilament with long yarn length B
: Short yarn length polyester multifilament toy: intertwined part, I: I: open rut part, huff untwisted part 4: water application device,
5 Entanglement processing device, 8: Frictional false twisting device Special pestle Applicant Teijin Ltd. Agent Patent attorney 1) Jun Hiroshi Figure 1

Claims (1)

[Claims] Consisting of 1 or 2 types of polyester multifilaments, all the single yarns have crimps, the yarn foot difference between the single yarns of both multifilaments is 5 to 10%, and A special composite processed yarn characterized by randomly and intermittent intertwined portions, spread portions, and untwisted portions. 2. Two types of undrawn polyester multifilaments with a cutting elongation of 100 to 250% and a difference in elongation of 50 to 120 inches are simultaneously fed at the same speed, and subjected to entanglement treatment by adhering water. After that, a method for producing a special composite textured yarn is characterized in that drawing and false twisting are performed simultaneously by friction false twisting means.