JPH0473225A - Production of bulky yarn - Google Patents

Abstract

PURPOSE:To obtain the subject bulky yarn free from separation of single filaments, having uniform distribution of single filament looseness in longitudinal direction and suitable for intermingled yarn by aligning synthetic fibers having different elongation at break, subjecting to crimping, etc., and blending the fibers. CONSTITUTION:Plural kinds of synthetic fibers such as nylon 6 fiber having an elongation difference of >=5% are produced by changing the draw ratio. The fibers are aligned, stretched preferably at a stretching ratio of 2-12%, heated at 150-200 deg.C, crimped, relaxed in an over-feeding region and blended in an air-entangling treatment region to obtain the objective bulky yarn.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a method for producing multicolored bulky yarn,
More specifically, the present invention relates to a method for producing a bulky yarn having pleochroic properties suitable for use in carpets.

[Prior Art] As a conventionally known method for producing bulky yarn, for example,
It is described in the publication No.-37403. Said Special Public Service 1987-
The method described in Publication No. 37403 involves separately melting two or more polymers with different colors or coloring properties, distributing and transporting each polymer to two or more spin blocks, and distributing the two or more polymers in each spin block. A multifilament consisting of a group of single fibers made of each heterochromic polymer is spun, then stretched or unstretched, bulked, entangled, and wound to create a bulky polychromatic yarn. Thread is obtained continuously.

[Problems to be Solved by the Invention] The multicolor bulky yarn obtained using the method described in Japanese Patent Publication No. 58-37403 is assembled immediately after spinning single fibers made of a heterochromatic polymer. The assembled fibers are immediately drawn, then subjected to a bulking process and rolled up, and the resulting bulky processed yarn has irregular loops and two types of bulky yarns that have multicolor properties. The fibers are not mixed evenly and each type of fiber is aggregated, and when woven into a carpet, only one of the aggregated threads is continuously exposed on the surface of the carpet, forming vertical stripes of the same color. Carpets with vertical stripes often have a problem in that their commercial value is significantly impaired.

[Means for Solving the Problems] The structure of the present invention uses a plurality of types of synthetic fibers that have been spun and drawn in a bulky yarn manufacturing method, and at least one of the synthetic fibers is one of the other synthetic fibers. The plurality of types of synthetic fibers having different elongation at break from each other by 5% or more are aligned and subjected to a first tensioning treatment at a stretch rate that does not substantially cause stretching in the first tensioning region; Continued from 150 to 200″
A preheating roller heated to a temperature of
A method for producing a bulky yarn is characterized in that the yarn is subjected to a tension imparting treatment, and then subjected to a fiber mixing treatment in an air entangling treatment area to obtain a crimped yarn having multicolor properties.

For example, in the case of nylon 6 fiber, the spun and stretched synthetic fibers of different dyeability used in the present invention include:
Fibers made of polymers with many NH2 terminal groups that can be dyed with acid dyes and l1m made of polymers with few NH2 terminal groups that are dyed with acid dyes and many C0OH terminal groups that are not related to dyeing.
It is dyed in shades of light and dark by combining it with 1 fiber.

A fiber that is dyed in different colors by combining a fiber made of a polymer with many NH2 end groups that can be dyed with acid dyes and a fiber made of a polymer with many SO3Na end groups that can be dyed with basic dyes.

Fibers made of polymers with many NH2 end groups that are dyed by acid dyes, fibers made of polymers with few NH2 end groups that are dyed with acid dyes and many C0OH end groups that are not related to dyeing, and polymers with many SO3Na end groups that are dyed with basic dyes. It is dyed in different shades and colors depending on the combination with fibers made of.

The above-mentioned plural types of fibers having different dyeability are spun and drawn or directly spun and drawn, and in the plural types of synthetic fibers that are spun and drawn, at least one type of synthetic fiber is different from other synthetic fibers. and the cutting elongation differs by 5% or more. The above-mentioned cutting elongation can be achieved by adjusting the stretching ratio when performing the above-mentioned stretching, and also by adjusting the amount of the terminal group amount adjusting agent or the terminal group introducing agent added to the polymer forming the synthetic fiber. It differs depending on.

The plurality of stretched fibers are aligned and guided to a first tensioning region, where they are subjected to a first tensioning treatment at a stretch rate of 2 to 12% at which substantially no stretching occurs.

If the stretch rate in the first tensioning area is less than 2%, the heat treatment with the preheating roller described later will be weak, and it will be difficult to crimp during the crimping process in the fluid treatment area, and the Also, it is undesirable because it tends to cause uneven winding in the length direction.

On the other hand, the stretch rate in the first tension application region is 1
When it exceeds 2%, the fibers are stretched, and this stretching tends to cause quality variations in the length direction of the fibers.

The plurality of synthetic fibers having different dyeability that have been subjected to the first tension imparting treatment are then wound around a preheating roller heated to 150 to 200°C to undergo a preheating treatment.

By performing the preheating treatment, it is possible to crimp the fibers in the next step extremely uniformly.When performing the preheating treatment, the surface temperature of the roller is set to 15%.
Adjust to a range of 0 to 200°C. When the surface temperature of the roller is lower than 150°C, the fibers are less likely to sag or loop when crimped in the next step, and when the surface temperature is higher than 200°C, the single yarns are fused together when crimped in the next step. When this fused portion occurs, the physical properties of the fiber in the longitudinal direction become extremely non-uniform.

The preheated dyeable synthetic fibers are then returned to the fluid treatment zone and crimped using steam at a temperature of 200 to 260°C to form curls and loops. Ru.

The pressure of the steam used in this fluid treatment area is selected depending on the shape of the nozzle used for fluid treatment, but is 5 to 9
kg/cm2 is preferably used.

If the temperature of the steam in the fluid treatment zone is lower than 200°C, it is difficult to fix the slack and loops formed in the fibers, and when tension is applied by the second tensioning device in the subsequent process, the slack and loops will be removed. may disappear, making it impossible to obtain good bulky fibers. Additionally, if the temperature of the steam in the fluid treatment area exceeds 260°C, some of the single yarns forming the fibers will
It may fuse to other filaments or disturb the molecular orientation of the filaments, which may prevent the quality of the fiber from becoming extremely uniform in the length direction.

The obtained bulky yarn is crimped in the fluid treatment zone and then guided to an overfeed zone with an overfeed rate of 40 to 100% where it is relaxed, cooled and wound. The shrinkage is fixed. In this case, a suction perforated drum is usually used.

The bulky yarn subjected to the relaxation treatment in the above-mentioned overfeed region is subsequently guided to the second tensioning region, and is subjected to a second tensioning treatment with a stretch rate of 10 to 50%.

By setting the stretch rate to 10 to 50%, the loops and slack of the bulky yarn formed in the fluid treatment area and the overfeed area are aligned. Stretch rate is 1
When it is less than 0%, the loops and slacks of the bulky fibers in the length direction of the fibers are not aligned and become irregular, resulting in uneven loop fibers. Further, when the stretch rate exceeds 50%, the loops and curls formed in the fluid treatment region and the overfeed region are fully extended, resulting in a decrease in bulkiness.

If necessary, in the second tension applying region, conductive fibers are introduced into the bulky yarn made of a plurality of synthetic fibers having different dyeability and having a stretch rate of 10 to 50%.

By introducing the conductive fibers in this second tension-applying region, the conductive fibers themselves do not form loops or slacks, and the loops and slacks imparted to the other dyeable synthetic fibers are used. To prevent the conductive fibers from being easily exposed on the surface when woven into a strength pet, cover the dark color due to carbon contained in the conductive fibers, and make the color tone of other dyed synthetic fibers clear.

The loops and slacks are straightened in the second tension application zone, and the bulky yarn into which the conductive fibers have been introduced is subsequently led to the air entangling treatment zone. In the air entangling treatment area, the overfeed rate is set in the range of 1 to 5%, and the air entangling treatment is carried out by supplying compressed air to the air entangling nozzle. The air pressure varies depending on the shape of the air entangling nozzle, but is 5 to 9 kg/c.
m2 is preferably used.

By setting the overfeed rate to 1 to 5%, the single yarns forming the bulky yarn are intermixed and tightly bound bundles are alternately formed approximately periodically. If the overfeed rate is less than 1%, the opening of the yarn in the air entangling nozzle may be poor, the single yarns may not be mixed well, and the entangling may occur. On the other hand, when the overfeed rate exceeds 5%, new slack occurs, and this slack tends to become a single yarn that is free and not mixed with other single yarns.

As described above, according to the method for producing multicolor bulky yarn according to the present invention, a plurality of types of synthetic fibers having different dyeability that have been spun and drawn are subjected to a first tensioning treatment, a preheating treatment, a crimping treatment, and a relaxing treatment. Bulky yarns formed from multiple types of synthetic fibers that exhibit dyeability due to the synergistic effect of sequentially performing treatment, second tensioning treatment, and fiber blending treatment under each condition, each single yarn has The conductive fibers are intermixed and separated by the loops and curls of each of the single yarns, and it is possible to obtain an ink mingle yarn which is extremely homogeneous in the length direction and is preferably used as a raw yarn for carpets.

In addition, since the method according to the present invention continuously obtains bulky yarn, each processing condition can be managed extremely easily, and by maintaining the processing condition range, high quality bulky yarn can be efficiently produced. Can be manufactured well.

The bulky yarn obtained by the method according to the present invention is one in which at least one of the plurality of synthetic fibers has a breaking elongation different from one of the other synthetic fibers by 5% or more, and the bulky yarn is used to create a carpet. When fiberized and dyed, synthetic fibers with low cutting elongation exist inside synthetic fibers with high cutting elongation in each loop of the carpet, and many of the synthetic fibers with high cutting elongation are exposed on the surface. do. Therefore, the resulting carpet has a deep multicolor and unique color.

[Effects of the Invention] According to the method for manufacturing bulky yarn according to the present invention, a multicolored dyed bulky yarn can be obtained by combining multiple types of synthetic fibers, and a cavette can be woven using the bulky yarn and dyed. In this case, the bulky yarn that forms a loop exhibits a phenomenon in which synthetic fibers with low breaking elongation exist inside the loop, and synthetic fibers with high breaking elongation are exposed on the surface. It is easy to obtain bulky yarns from which carpets with different colors can be obtained.

On the other hand, the bulky yarn obtained by the method of the present invention does not allow the single yarns forming each compounded synthetic fiber to come loose until it is woven into a carpet, and each single yarn forming bulky yarns does not come loose. It is possible to easily obtain ink mingle yarn, which has no sag or loops in the lengthwise direction of the fibers and is preferably used as a raw yarn for multicolored carpets.

Furthermore, the method according to the present invention can continuously produce multicolor dyed bulky yarn, and can operate smoothly without releasing each single yarn of synthetic fiber during the manufacturing process, resulting in high quality bulky yarn. This improves productivity by making it possible to manufacture products with high efficiency.
Quality control can be easily performed.

Claims (1)

[Claims] In the method for producing a bulky yarn, a plurality of types of spun and drawn synthetic fibers are used, at least one of the synthetic fibers has a breaking elongation different from one of the other synthetic fibers by 5% or more, and the plurality of types of synthetic fibers are The synthetic fibers are aligned and subjected to a first tensioning treatment at a stretch rate that does not substantially cause stretching in the first tensioning region, followed by a preheating roller heated to 150 to 200°C. After performing a preheating treatment, then performing a crimping treatment in a fluid treatment zone and a relaxation treatment in an overfeed zone, a second tensioning treatment is performed in a second tensioning zone, and then an air entangling treatment zone. 1. A method for producing a bulky yarn, which is characterized by subjecting it to a blending process to obtain a crimped yarn having multicolor properties.