JPS63235513A - Production of combined filament yarn - Google Patents

Abstract

PURPOSE:To obtain a combined filament yarn having excellent difference in physical properties, such as shrinkage or elongation, by doubling a fiber bundle treated by a directly connected spinning and drawing method with another fiber bundle at a specific position. CONSTITUTION:A fiber bundle (A) discharged from a spinneret 1 is drawn and heat-treated by rollers 4 and 5. A fiber bundle (B) discharged from a spinneret 2 is passed through a roller 6 and led to the roller 5 and the fiber bundles (A) and (B) are doubled in front or at the back of the roller 5, as necessary, passed through an interlacing and entangling device 7 and the wound by a winder 9. Thereby a combined filament yearn having a sufficient difference in physical properties can be obtained by using a directly connected spinning and drawing method.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for producing a special blended yarn of synthetic fibers, and more specifically, to a method for producing a special blended yarn of synthetic fibers, and more specifically, it relates to a method for producing a special mixed fiber yarn of synthetic fibers, and more specifically, it relates to a method for producing a special blended yarn of synthetic fibers, and more specifically, This invention relates to obtaining spliced yarns with different physical properties such as shrinkage differences and elongation differences using a direct spinning and drawing method.

<Prior Art> Recent textiles for clothing use so-called mixed fiber yarns, which are made by combining a plurality of fiber bundles with different physical properties.

A specific method for obtaining such a mixed yarn is to extrude two types of polymers one by one, immediately combine the two types of fiber bundles obtained, and then perform stretching, heat treatment, etc. method (spinning blending, method of drawing two types of fiber bundles with different drawing conditions and then spinning them into gold thread (drawn blending), or combining two types of undrawn yarns with different spinning speeds and then drawing or A common method is to perform the twisting process together.However,
All of these methods have the drawback that sufficient differences in physical properties cannot be obtained, or even if they can, the process is complicated.

In order to obtain a sufficient difference in physical properties, it is necessary to combine two undrawn yarns, semi-drawn yarns, or drawn yarns with different elongations (for example, different spinning speeds or significantly different stretching conditions). However, in order to prepare two or more undrawn yarns, semi-drawn yarns, or drawn yarns with different elongations, two spinning machines with different spinning speeds are generally required. Or, if a drawing process and equipment are necessary to partially draw one fiber bundle, and if fiber bundles with different elongations are drawn with gold thread or false-twisted, these Two shelves (creels) are required to set the yarn. In this way, when using a combination of yarns with different elongations to create new, high-value-added materials, multiple spinning machines and creels are required, and operability becomes complicated. . What is better in terms of productivity because it requires a lot of effort and time? No.

Recently, since a drawn yarn can be obtained immediately by using the direct spinning drawing method, the direct spinning drawing method has attracted attention and is becoming widely used. A method of immediately obtaining a mixed fiber yarn with different shrinkage by using a spinneret, or a method of dividing the fiber bundle into two fiber bundles directly under the spinneret and changing the contact time between the two fiber bundles with the roller. Although methods for obtaining shrunk mixed fiber yarns have been proposed, it is impossible to obtain mixed fiber yarns with sufficient differences in physical properties using such methods.

<Problems to be solved by the invention> The purpose of the present invention is to obtain a mixed fiber yarn with excellent physical properties by using a direct spinning drawing method which is extremely efficient in terms of productivity. The present invention provides a method that does not have the drawbacks of the conventional methods as described above.

Means for Solving Problems〉 The present invention provides for the fiber bundle (A) and (Bl) formed by extruding a polymer from a spinning nozzle.
Al is taken up by a first roller, then taken up by a second roller that rotates at a speed higher than the surface speed of the first roller, and then wound into a winder. Processing is performed by a so-called direct spinning drawing method, and the fiber bundle fBl is transferred to the first roller. This is a method for producing a mixed fiber yarn, characterized in that the yarn is taken up by the second roller without being taken up, and the yarn is combined with a fiber bundle (Al) before or after the second roller, and then wound into the winder as a combined fiber bundle. .

In conventional conventional spinning machines, even if there is a godet roller, the surface speed of the roller is almost the same as the winding speed, so it is difficult to obtain mixed fiber yarns with different draw ratios. On the other hand, in the direct spinning drawing device, the first roller speed (
Spinning speed and second roller speed (stretching speed ÷ winding speed)
can be freely changed, and if the yarn is directly guided to the second roller without using the first roller and taken up by the first roller, the yarn can be spun at a high speed that is different from the spinning speed of the first roller. can be collected,
In addition, we focused on the fact that it is possible to collect two types of drawn yarn with different draw ratios by installing two No. 1 four-layers and adopting different surface speeds. This is what the present invention has accomplished.

An example of the method of the invention will now be explained with reference to the figures.

The fiber bundle (Al) is discharged from the spinneret 1, applied with an oil by the oiling device 3, and subjected to stretching heat treatment by the first roller 4 and second roller 5 (heat treatment is not essential). It is discharged from the spinneret 2 (of course, it may be a part of the spinneret 1), is applied with oil by an oiling device 3, passes through a free roller or a separately driven first roller 6, and reaches the second roller 5.
The fiber bundle (Al and FB+) is combined before or after the roller, and if necessary, passed through an interlace entangling device 7 and wound up by a winder 9. As a result, the resulting refined fiber bundle (A) can obtain physical properties similar to drawn yarn or semi-drawn yarn,
- 10,000 fiber bundle + B) has different physical properties and spinning speed 5 from tA)
A high-speed undrawn yarn can be obtained, and a mixed yarn with different shrinkage and elongation between Al and (B) can be obtained.

In the method of the present invention, in order to obtain two types of fiber bundles with different physical properties, two sets of spinning nozzles are used.Although it can also be used for applications such as mixed fibers of different fineness, the fiber bundles spun from one nozzle are There is no problem in dividing the . However, since the draft drawing ratios are different, the spinnability or drawing properties become unstable. Therefore, in order to obtain stable spinning and drawing properties, two sets of spinnerets are used, and the combination of spinnerets that match the spinning and drawing conditions must be used. It is preferable to use

When producing a yarn with mixed fineness or a bulky textured yarn that utilizes the difference in elongation, it is customary to use a low count fiber bundle as the core yarn. In this case, it is preferable to set the low-temperature drawn yarn side, where the shrinkage is large, or, when the mixed fiber yarn obtained in the present invention is subsequently false-twisted, to set the low-elongation drawn yarn side to have a large single fineness.

The biggest feature of the method of the present invention is that the first roller and the second roller
This method takes advantage of the fact that it is possible to freely select and combine the speeds of the rollers, and it is also possible to roughly change the heat set temperature of both rollers.

The fiber bundle to be drawn can be obtained from a low-speed spinning yarn to an ultra-high-speed spinning yarn by changing the take-up speed of the first roller, and can be arbitrarily stretched by the second roller. Monkey. The temperature of the first roller is preferably in the range of 70 to 90°C, which is the temperature of the 10th roller, from the viewpoint of good stretching properties.As for the second roller, if the heat setting temperature of the second roller is too high, the stretching of the other roller will be affected. Since the fiber bundles that are not subjected to heat setting are also heat set, it is desirable that the 20th-Ra1 temperature be as close to room temperature as possible, except in special cases, and specifically, be below the secondary transition point temperature.

For these reasons, it is easy to obtain a drawn fiber bundle (Al) in a relatively low elongation region and a high shrinkage region, and it is relatively difficult to obtain a drawn yarn in a high elongation region and a low shrinkage region.

- Since the fiber bundle (B) is normally wound directly onto the second p-row without drawing, it is difficult to obtain an undrawn yarn at a comparatively low speed, and an undrawn yarn at a medium to ultra-high speed A is difficult to obtain. It is easier to obtain a yarn, and therefore, it is easier to obtain an undrawn yarn in a medium elongation range and from a high shrinkage range to a low shrinkage range.

By various combinations of these drawn yarns and undrawn yarns, it is possible to produce mixed fiber yarns having different shrinkage and elongation differences.

The biggest operational difficulty of the method of the present invention is that the fiber bundles Δ and B
The method of guiding the yarn, the number of times it is wound around the roller, and the number of times it is wound. In particular, only the fiber bundle is wound several turns in succession on the first roller, and when the yarn is doubled on the second roller, it is necessary to wind it again several turns in succession, so it is necessary to add a splitting guide to the roller bend, etc. This can prevent yarn sway and yarn hit.

As the polymer used in the method of the present invention, polyester, ie, a polyester polymer containing ethylene terephthalate units as a main component, is preferable from the viewpoint of heat setting properties and use in clothing.

Next, in the method of the present invention, the characteristics of the mixed fiber yarn obtained when the conditions of the first roller and the second roller are variously changed will be shown in two examples. Of course, the mixed yarn obtained by the method of the present invention is not limited to those described in this example, and the yarns not described in the example are representative of the method of the present invention.

Example 1 A polyethylene terephthalate bright polymer having an intrinsic viscosity [η] of 0.65 obtained by a conventional method was prepared from a base 1 having a 24-hole irregular Y-shaped cross-section nozzle and a mouth 2 having a 48-hole irregular Y-shaped cross-section nozzle. 28 per minute.
It was extruded at a discharge rate of 90 durams.

The yarn (A) discharged from the mouthpiece 1 has a circumferential speed of 3400rrL.
/min, after winding on the first roller at a temperature of 80°C, the peripheral speed is 53
Stretching was performed between second rollers at room temperature at a rate of 00 rrL/min. - The yarn fBl discharged from the nozzle 2 is wound around the first roller, passed through a free roller under the first roller, and then directly wound around the second roller, and is subjected to an interlace entangling process together with the yarn A. I wound it up in a winder.

The physical properties of the obtained mixed fiber yarns and the threads collected using the sieves alone are as follows.As a result of producing a warp-warp VIERA fabric using the obtained mixed fiber yarns, it was found that the fabrics were rich in bulk. A fabric with a similar texture was obtained.

Brand Water manufacturing shrinkage rate: Blended fiber yarn 100/72 19% Fiber bundle (
A) 50 / 24 23% // (131
50/48 4.2% Example 2 Pressing was carried out in the same manner as in Example 1 from two sets of 1.2 nozzles at a discharge rate of 18.96 grams per minute.

The yarn A discharged from the nozzle 1 has a circumferential speed of 10007 n/min,
After being wound around the first roller at a temperature of 82°C, the circumferential speed was 325am.
The yarn B discharged from the nozzle 2 after being drawn between the second rollers at room temperature for 10 minutes is passed through the free roller under the first roller and directly transferred to the second roller without being wound around the first roller.
The yarn was wound around a roller (interlaced with Al and then wound up in a winder. The physical properties of the resulting mixed yarn and each individual yarn were as follows. .

Brand Elongation blended yarn 105/72 53% yarn (
Al 52.5/24 47% (Bl
52.5/48. 140% overfeed of the above blended yarn; minus 4%; number of false twists; 2sooT, 4
．． As a result of false twisting at a twist setting temperature of 190° C. and a false twisting speed of zoom/min, a bulky yarn with a yarn length difference of about 20% was obtained. −

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an apparatus capable of carrying out the method of the present invention, and numbers 1 to 9 in the figure represent the following. 1. Spinneret 2. Spinneret 3, oiling equipment f! t4. 1st roller 5, 2nd roller 6. Free roller 7, interlacing nozzle 8. Traverse guide 9, winder

Claims (1)

[Claims] Of the fiber bundles (A) and (B) formed by extruding the polymer from a spinning nozzle, the fiber bundle (A) is
The material is taken up by a roller, then taken up by a second roller that rotates at a faster speed than the surface speed of the first roller, and then processed by a so-called direct spinning/stretching method in which the material is wound up in a winder.
Taking the fiber bundle (B) to the second roller without taking it to the first roller, combining it with the fiber bundle (A) before or after the second roller, and then winding it in the winder as a combined fiber bundle. A method for producing a mixed yarn characterized by: