JPH09310220A - Production of heteroshrinkable blended filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heteroshrinkable blended filament yarn in high productivity by a simplified means by making two filament yarns either extruded from respective two spinnerets or splittedly extruded from a single spinneret differ in shrinkage by making use of the difference between the corresponding yarn route treatment conditions and then blending the treated two filament yarns through regulating the respective take-up tensions applied to the filament yarns. SOLUTION: First, two filament bundles either extruded from left and right two spinnerets 4, 4 or splittedly extruded from a single spinneret are cooled by cooling wind from a cooling wind room 5. Secondly, one party of the two filament bundles is heat-treated with a yarn route heating device 7 and then immediately oiled into a filament yarn 8 of low boiling water shrinkage; while the other party is oiled at a position situated sufficiently apart from the spinneret(s) 4 into the other filament yarn 9 of high boiling water shrinkage. Subsequently, the respective take-up tensions applied to these filament yarns are properly regulated through godet rollers 10, 11 and then doubled and blended with each other using a pressure interlacing device 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing different shrinkage mixed fiber yarns, and more particularly, to simplifying the manufacturing process in a yarn traveling route (yarn path) to integrate all steps into one process. By the method described above, the present invention relates to a method for producing a different shrinkage mixed fiber having different shrinkage rates.

[0002]

[Prior Art] Soft and fluffy texture
The different-shrinkage mixed filament yarn having such a characteristic occupies a considerably large specific gravity in the long fiber (filament yarn) market, and is one kind of high value-added cloth (foil). A general method for producing a different shrinkage mixed yarn is to use two or more types of long fibers (filaments) having different boiling water shrinkage ratios, and a different shrinkage mixed yarn through two to two or more steps. However, after the different shrinkage mixed yarn is woven, the shrinkage difference occurs between the fibers in the relaxation process in the scouring, which is a high-order process, resulting in bulkiness or special fluffiness. Since the texture is developed, it has properties like raw yarn and also like spun yarn.

In the prior art, the method for producing the different shrinkage mixed yarn is
Including a spinning step, a heat treatment step, a drawing step and a compounding step which are independent of each other, usually, the raw material fibers are spun separately to make a yarn for mixing fibers (fully drawn yarn or undrawn yarn), and then, Under different conditions (for example, one yarn uses a drawn hot plate and the other does not use a drawn hot plate), simultaneously draw and combine yarn to obtain a different shrinkage mixed yarn. there were. However, the manufacturing process is complicated as a whole and involves a multi-step bobbin winding and transporting process, which causes a problem of high cost.

In order to solve such a problem, Japanese Utility Model Publication No. 50-32574 discloses a method of shortening the manufacturing process of the different shrinkage mixed yarn. That is, when the apparatus shown in FIG. 4 is used, different shrinkage mixed fiber yarns can be continuously obtained from the spinneret of the same weight. The method is that fibers extruded from the spinneret 83 are bundled into two filament bundles. , One of the filament bundles 81 is superstretched while sequentially passing through the stretching rollers 84, 85, 86, 87, and then heat treated by a hot plate 90,
While obtaining the yarn A having a high boiling water shrinkage, another filament bundle 81 'is stretched by the stretching rollers 84', 85 ', 87.
After being drawn while sequentially passing through ′ ′, heat treatment was performed with a hot plate 90 ′ to obtain a yarn B having a low boiling water shrinkage ratio. Then, the above yarns A and B were combined through a yarn guide 92 and then wound around a package 94. However,
In order to generate a difference in shrinkage, the above-mentioned apparatus uses a large number of stretching rollers, and it has been difficult to adjust the rotation speed and heating temperature of each stretching roller. Also,
A large number of drawing rollers tend to cause yarn entanglement,
Since the operability is poor, it cannot be said that the above-mentioned device is actually easy to control.

Therefore, Japanese Patent Application Laid-Open No. 1-221505 (Japanese Patent Application No. 63-45417) discloses a device using a device as shown in FIG. This device is similar to the spin-drawing unit (spin-draw unit) in which two spindles are arranged in parallel in the prior art, and a molten polymer is extruded from the spinneret of one of the spinning and drawing devices to form filaments while forming a godet roller ( godet rollers) 31 and 32, and further subjected to a heat treatment to obtain the yarn A, and extruding the molten polymer from the spinneret of the other spin-drawing device to form yarns and guiding them to the godet rollers 33 and 34. Heat treatment was performed under different conditions to obtain a yarn B having a boiling water shrinkage different from that of the yarn A (for example, yarns A to 100
At the same time as obtaining high shrinkage yarn through the godet roller at ℃,
From the yarn B, a low and high shrinkage yarn was obtained through a godet roller at 170 ° C). Then, the yarn A and the yarn B are run in parallel on the godet roller 34, and then entangled (mixed yarn) by an interlacing nozzle to obtain a different shrinkage mixed yarn.

[0006]

[Problems to be Solved by the Invention] Japanese Utility Model Publication No. 50-3257
Compared with the manufacturing process disclosed in Japanese Patent Laid-Open No.
Although the manufacturing method disclosed by No. 221505 was simplified, however, the number of godet rollers used was still too large, and it was necessary to use a special suction gun and thread hooking technique. It had a bad influence on work efficiency and production efficiency.

The present invention is intended to solve the above-mentioned problems of the prior art, and simplifies the manufacturing process to reduce the production cost and provides an efficient method for producing a different shrinkage mixed yarn. It is a thing.

[0008]

A method for producing a different shrinkage mixed fiber according to the present invention is a spinneret which is a single spinneret but is divided into two filament bundles or a spinneret composed of two adjacent spinnerets. After obtaining two high and low shrinkage yarns with different shrinkage ratios separately using the device, adjusting the take-up tension via the guide roller, and then performing the yarn-mixing and fiber-mixing in the nozzle of the air-pneumatic entangler, At least 40
It is taken up at a speed of 00 m / min to obtain a different shrinkage mixed yarn.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view for explaining a method for producing a different shrinkage mixed yarn according to the present invention, and FIG. 2 shows a yarn path heating device according to the present invention. FIG. 3 is a cross-sectional view in which a plane display is added to FIG. 3, and FIG.

Referring to FIG. 1, the method for producing a different shrinkage mixed yarn according to the present invention uses the apparatus shown in FIG. 1 and uses polyethylene terephthalate having an intrinsic viscosity of 0.64 as a raw material. be able to. The spinneret on the right side of the figure has a hole number of 48, the spinneret on the left side of the figure has a hole number of 24, and the spinning temperature is 2
Set to 90 ° C. The polyethylene terephthalate raw material is supplied from the hopper, and the amount of the molten raw material discharged from the extruder 1 and the filter 2 by the metering pump 3 is 29.1 g / m 2.
While controlling to in, it is taken out from the spinneret 4 and cooled by cooling air from the cooling air room 5. The filament bundle from the spinneret 4 on the right side of the drawing is heated by the yarn path heating device 7 and then immediately converged. After oiling (6a), the yarn A is a fine denier and has a low boiling water shrinkage. At the same time, the filament bundle from the spinneret 4 on the left side of the drawing is taken up from the spinneret 4 to a distance of 6 m and then bundled and oiled (6b) to become a thick denier B yarn 9 having a high boiling water shrinkage ratio. The two A and B yarns 8 and 9 are properly adjusted in take-up tension through the G1 godet roller 10 and the G2 godet roller 11 to be combined inside the air-pneumatic confounder 12 and by the air pressure of 5 kg / cm ^2. After the entangled and mixed fibers, the mixed shrinkage yarn package 14 is wound by the winder 13 at a take-up speed of 4500 m / min. The heterogeneous shrinkage mixed yarn thus obtained has a stable fiber structure and an extremely large difference in boiling water shrinkage (see Table 1 below). Therefore, it has a high bulkiness through the weaving process. It becomes a dead cloth.

[0011]

[Table 1]

The fully stretched strongly twisted yarn of 150d / 48f was used as warp (warp) yarn, and the different shrinkage mixed yarn (60d /
When a weft (48f + 60d / 24f) is used as a weft fabric with a loom, a shrinkage ratio in the warp (warp) direction of 30% can be achieved, and the dyeing uniformity of the fabric is good. Therefore, the bulkiness and the drape property were both good.

In the spinning process, the change in shape caused by drawing is extremely large, and some parts become irrecoverable plastic deformation due to crystals, and some parts become unstable amorphous regions. When it is heated or humidified, it contracts. This invention controls the size of the shrinkage rate of the fiber by controlling the formation of the fine structure of the fiber by using the above-mentioned method, and adjusts the manufacturing process on the yarn traveling path (yarn path). Different contraction ratios are expressed through the fiber to obtain a different contraction mixed fiber.

The method for producing a different-shrink mixed fiber according to the present invention utilizes a single spinneret, which is a spinneret divided into two filament bundles, or a spinning apparatus composed of two adjacent spinnerets. That is, one filament bundle extruded from the spinneret is subjected to yarn path heating treatment and then bundled and oiled to obtain a low shrinkage yarn, while another filament bundle is rapidly cooled by cooling air without undergoing the yarn path heating treatment. Simply, after delaying the time to obtain the high shrinkage yarn by focusing oiling, the high shrinkage yarn and the low shrinkage yarn are further tension-adjusted via the godet roller, and then combined inside the air-pneumatic entangler. The fibers are mixed together and wound to obtain a different shrinkage mixed yarn.

More specifically, referring to FIG. 1 and FIG. 2, according to the method for producing a different shrinkage mixed yarn according to the present invention, the filament bundle extruded from the spinneret 4 of the spinning machine is discharged from the cooling air room 5. It is cooled by the cooling air, but one of the A yarns 8 is further added to the yarn path heating device 7
Focusing oiling 6a after heat treatment (see FIG. 2)
Then, a low shrinkage yarn with advanced crystallization is obtained. In this process of low shrinkage yarn, low shrinkage yarn can be obtained without heating the yarn path, but its cutting elongation is large,
Unfavorable stretching is likely to occur in the warping or weaving process in the subsequent step, which adversely affects the fiber structure and causes dyeing abnormality. Therefore, it is intended to obtain a yarn having a small elongation and a small shrinkage ratio by further stretching the yarn A after the yarn path heat treatment. The other B yarn 9 is not subjected to the yarn path heating process, but is delayed in time and focused on the euling 6
A high shrinkage yarn is obtained by adopting the method of b. The B yarn 9 is rapidly cooled by air resistance to produce a high shrinkage yarn having low crystallinity but high orientation. The two A yarns 8 and the B yarns 9 have their take-up tensions adjusted by the G1 godet roller 10 and the G2 godet roller 11, and then the yarns are mixed and mixed in the compressed air interlacing device 12 and at least 4000m / min. , Preferably 4500 or 5
The mixed shrinkage yarn is obtained by winding at a speed of 500 m / min. The quality of the single-step type different-shrink mixed yarn according to the present invention is good, and it can be directly provided for use in the next step, warping or weaving.

In the present invention, the yarn path heating device 7 (see FIG. 2) used during the production of the low shrinkage yarn is of an open / close type and therefore has excellent yarn hooking workability.
2 surrounds the fiber in a non-contact manner, the yarn path 7-3 has a conical shape, and radiant heat of ceramic far infrared rays, heated air or steam is adopted as a heat source so that the entire fiber is uniformly heated. I am configuring. Since the filament bundle is further drawn after the yarn path heat treatment, the crystallization becomes more complete, and the fiber structure approaches a perfect one. can get. For example, if the spinning speed is 4500 m / min and the heat treatment temperature is 250 ° C., the cutting elongation is 35%,
A yarn having a boiling water shrinkage of 7.0% can be obtained.

In the present invention, when the high shrinkage yarn is manufactured, a method of delaying the time to perform the focusing oiling 6b is adopted, and the farther the focusing oiling 6b position is from the spinneret 4, the greater the air resistance received by the filament. Since the yarn stress also increases, the rapid cooling effect is enhanced and a fiber structure having low crystallinity but high orientation is formed. FIG. 3 is a graph showing the relationship between the position of the focusing oiling 6b and the contraction rate of boiling water at a spinning speed of 45000 m / min. As can be seen from this graph, the farther the focusing oiling position 6b is from the spinneret 4, the more the boiling water. The shrinkage rate is large, and the boiling water shrinkage rate is notable until the shrinkage rate is at least 3 m or more.

The low shrinkage yarn portion of the different shrinkage mixed fiber yarn forms a loop, and it is the high shrinkage yarn portion that substantially shrinks. When a different shrinkage mixed fiber is subjected to relaxation treatment (heating treatment), the high shrinkage yarn part forms the core part and the low shrinkage yarn part forms a loop and surrounds the core yarn as a sheath part The boiling water shrinkage rate and strength of the mixed fiber are mainly determined by the performance of the high shrinkage yarn portion. Therefore, the high-shrinkage yarn part is thick denier, and the core yarn supports the strength and elastic recovery of the yarn, and the thin denier low-shrinkage yarn part is crimped around the core yarn.
This gives the fiber bulkiness, flexibility and soft texture.

[0019]

As described above, according to the method for producing a different shrinkage mixed yarn according to the present invention, the spinning and the pressure entanglement can be performed in a single step, and the different shrinkage mixed yarn can be obtained at one time. The required yarn tension can be achieved with an appropriate take-up speed, and the yarn with good shrinkage can be obtained as the whole package by adjusting the take-up tension by the godet roller and the stable air-pneumatic entanglement effect. Moreover, the different-shrinkage mixed filament yarn completed in this single step has good quality and can be directly provided to the warp which is the next step and used for weaving. Therefore, not only the conventional manufacturing process can be shortened, but also the cost can be reduced, the workability is excellent, the production efficiency is high, and the manufacturing method of the different shrinkage mixed yarn having good quality can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a method for producing a different shrinkage mixed yarn according to the present invention.

FIG. 2 is a cross-sectional view showing a yarn path heating device according to the present invention, in which a plan view is added for explanation.

FIG. 3 is a graph showing the relationship between the focusing oiling position and the boiling water shrinkage rate in the method for producing a different-shrinkage mixed fiber yarn according to the present invention.

FIG. 4 is a schematic view showing an apparatus used in a conventional method for producing a different-shrink mixed fiber.

FIG. 5 is a schematic view showing an apparatus used in a conventional method for producing a different-shrink mixed fiber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extruder 2 Filter 3 Metering pump 4 Spinneret 5 Cooling air room 6a Focusing oiling on low shrinkage yarn side 6b Focusing oiling on high shrinkage yarn side 7 Yarn path heating device 7-1 Plan view for explanation 7-2 Heater 7 -3 Thread path (conical shape) 8 A thread (low shrinkage thread) 9 B thread (high shrinkage thread) 10 G1 godet roller 11 G2 godet roller 12 Air pressure interlacer 13 Winder 14 Package

Claims (8)

[Claims] 1. A step of (a) extruding a filament bundle from a single spinneret into two yarns, or extruding from two spinnerets into two yarns, and (b) discharging from the spinneret. (2) cooling one yarn with cooling air; and (c) heating one yarn yarn and then concentrating oiling to obtain a low shrinkage yarn with a small elongation, while heating the other yarn yarn yarn. Without treatment, a step of delaying the time to perform bundled oiling to obtain a high shrinkage yarn, and (d) adjusting the take-up tension of the high shrinkage yarn and the low shrinkage yarn through the godet roller, and then mixing and mixing. A process for producing a different shrinkage mixed yarn, comprising: a step of performing a fiber; and (e) a step of winding at a proper take-up speed to obtain a different shrinkage mixed yarn. 2. The take-up speed is at least 4000 m
/ Min It is a manufacturing method of the different shrinkage mixed filament yarn of Claim 1 characterized by the above-mentioned. 3. The take-up speed is preferably 4500 m
/ Min to 5500 m / min, The method for producing a different shrinkage mixed yarn according to claim 2. 4. The yarn path heating device employs a yarn path heating device that uses an open / close method and the heater surrounds the filament bundle by a non-contact method. A method of manufacturing differently-shrinked mixed yarns. 5. The method for producing a different-shrinkage mixed-fiber yarn according to claim 4, wherein the yarn path heating device employs ceramic far-infrared radiation heat or heated air or steam as a heat source thereof. 6. The heterogeneous-shrinkage mixed-fiber yarn according to claim 1, wherein the two spinnerets are fine denier yarn yarns and thick denier yarn yarns, respectively, having different numbers of holes. Manufacturing method. 7. The manufacturing process for obtaining the high shrinkage yarn is to obtain the boiling water shrinkage ratio of the high shrinkage yarn by adjusting the distance between the spinneret and the focusing oiling position. Item 2. The method for producing a different shrinkage mixed yarn according to Item 1. 8. The heterogeneous shrinkage mixture according to claim 1, wherein the two spinnerets have a modified cross section in which one or both horizontal cross sections have non-circular pores. Manufacturing method of yarn.