JPS61124638A - Special blended fiber yarn and its production - 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 <Industrial Application Field> The present invention relates to an entangled mixed fiber yarn of a drawn polyester yarn and a potentially splittable fiber, and more specifically, a drawn yarn of a high shrinkage polyester and a drawn yarn of a low shrinkage polyester yarn. Shrinkable, potentially splittable fibers can be mixed with entangled fibers, treated with fibers, divided into fibrillated fibers, and heat-shrinked to produce high-density fabrics and fabrics with a soft, premium cotton-like texture. The present invention relates to the special mixed fiber yarn obtained.

<Prior art> Conventionally, for example, fibers having a multilayer mixed structure made of two or more types of polymers with poor mutual affinity and fibers made of a normal single polymer are combined and false-twisted. For example, a processed yarn made by dividing the fibers into fine fibers and mixing the fine fibers with ordinary fibers is produced by, for example,
It is known from Publication No. 23968 and the like.

<Problems to be Solved by the Invention> However, in the above-mentioned processed yarn consisting of divided fine fibers and normal fibers, the fine fibers and normal fibers are mixed relatively uniformly, so the fine fibers are His unique soft touch is hard to take advantage of.

The present invention aims to provide a yarn with a special structure in which fine fibers appear on the surface and can provide a high-quality cotton-like waist and soft touch.

<Means for Solving the Problems> The present invention consists of a drawn polyester yarn (A) having a snot shrinkage rate of 10% or more and a potentially splittable fiber (B) having a snot shrinkage rate of 10% or less. The blending ratio of (B) is 50 to 7.
A special blended yarn characterized by being intertwined and mixed at a rate of 5%, and unspun and drawn yarns for polyester drawn yarn and potentially splittable fibers in the same drawing weight, Stretching is performed by applying different heat treatments to have different heat setting properties, with the former having a snot shrinkage rate of 10% or more and the latter having a snot shrinkage rate of 10% or less, and the mixing ratio of the latter being 50 to 7.
The method for producing a special blended yarn is characterized in that after the yarn is doubled as 5%, an entanglement treatment is performed and the yarn is wound up.

First, in the mixed fiber yarn of the present invention, it is desirable that the difference in the snot contraction rate between the two yarns is large. Therefore, in K, the shrinkage rate of the polyester drawn yarn (A) that becomes the core yarn is 10% or more, and the splittable fiber (
The shrinkage rate of B) is set to 10% or less, and both yarns are selected within this range. However, if the shrinkage rate of the core yarn exceeds 20%, there will be problems with dimensional stability and uniformity of the fabric.
The shrinkage rate of the core yarn is preferably 10 to 20%, while the shrinkage rate of the splittable fibers is preferably about 8% or less in order to take advantage of the texture as the outer yarn.

In addition, the mixing ratio of these (A) and (B) is set so that the function and texture of the splittable fibers are not impaired, and the defects of stiffness and sagging due to too little core yarn occur. It is necessary that the proportion is 50-75%.

The most rational method for manufacturing these entangled blended yarns is to spin the polyester undrawn yarn (A) that will serve as the core yarn and the splittable undrawn yarn (B) to improve their physical properties so that they can be drawn at the same draw ratio. It is most rational to adjust the speed and stretch both at the same stretching ratio within the same stretching weight, with only the heat treatment conditions different, and then perform the entanglement treatment. As shown in Fig. 1 or 2, this method is easy to apply different heat treatments depending on the presence or absence of a heat plate. It is.

If the spinning speed cannot be drawn at the same draw ratio due to large differences in width, as shown in Fig. 3 or 4, the low-shrinkage splittable fiber (D) is separately drawn, and then the high-shrinkage polyester is drawn. It is preferable to introduce splittable fibers and entangle and mix the drawn yarn (A) during or after drawing.The reason is that low-shrinkage splittable fibers are split during drawing and do not cause fuzz wrapping or yarn breakage. However, if trouble occurs during the drawing of the doubling yarn, the operation rate is likely to be poor.Also, since the purpose of drawing the drawn yarn, which becomes the core yarn, is to achieve high shrinkage, no plates or two-stage heated rollers are used. Since the temperature can be lowered, even if other fibers are introduced and mixed fibers are mixed, the tension of the two fibers can be easily matched, and there is no difference in heat shrinkage, so there will be no loops or fluff, and it will be stable. and rarely cause trouble.

The method for obtaining the potentially splittable fibers used in the present invention is as follows:
There are two common methods.

One is by multi-layer cross-sectional composite spinning using a combination K of different polymers such as polyester polymer and polyamide.The product obtained by this method is easy to split, and can also be split by heat or tension during stretching or false-twisting. All are fine filaments.

The other is polyethylene glycol, polymers with inorganic or organic compounds added, or sulfo-iso-7
This is a composite spinning method in which multiple layers of polyester polymer, such as tar acid-modified polymer, which has a fast alkali dissolution rate, and one layer of normal polyester polymer are formed. In this method, the intermediate layer is dissolved with alkali etc. in the subsequent process, so
The number of fineness filaments is approximately 1/2.

Even in the case of composite spinning using the former combination K of different polymers, it is difficult to completely divide the fibers during stretching, and post-treatment, that is, chemical treatment or physical impact treatment, is required. It is preferable in terms of process handling to divide the process in close steps.

In addition, it is possible to increase the shrinkage rate of high-shrinkage drawn yarn that becomes the core yarn by changing the heat treatment conditions during stretching, but as a polymer, it is possible to increase the shrinkage rate of the high-shrinkage drawn yarn. By using , it is possible to further increase the shrinkage rate.

As conditions for entangling these mixed yarns, a generally used interlacing nozzle and fluid pressure are sufficient, and a method of adjusting tension in a two-stage stretching section is particularly desirable, but any method is possible.

The entangled blended yarn obtained in this way may be subjected to a false twisting process afterwards, and even if additional twisting is added, the processability is good, and by making it into a false twisted yarn, it has a bulky and soft feel. A fabric with further improved properties can be obtained.

Effects and Effects> The nine-compound yarn obtained in the present invention is resistant to friction with the spindle during the subsequent false twisting process, heating with a heater, fabric dyeing, finishing process, abrasion, stamping, heat treatment, etc. The splittable fibers are made into fine fibers, and the polyester fibers on the high-shrinkage side are shrunk, resulting in a soft, high-grade cotton-like yarn with fine fibers exposed on the surface.

In particular, when the blended yarn is woven and knitted nine times and then subjected to the above-mentioned fine fiberization and shrinkage, the fabric becomes highly dense and closely resembles a fabric using high-grade cotton yarn.

<Example 1> Using a polyethylene terephthalate polymer obtained by a conventional method, spinning was carried out at a winding speed of 1100 m/min. (A) and a multilayer composite made of a combination of different polymers #Elongation after washing and spinning at a winding speed of 1050 m/min 37796.245 denier/I
The potentially splittable fiber (B) of the /24 filament was subjected to a splicing, drawing and entangling treatment according to the method shown in FIG.

Here, the potentially splittable fiber is a nine-layer parallel split type (so-called oval type) composite fiber of polyethylene terephthalate polymer and 6-6 nylon.

In FIG. 1, the temperature of the first roller 1 is 85°C, the first roller 2 and the third roller 3 are at room temperature, and the temperature of the heating plate is 165°C. Undrawn yarn and splittable fiber (B
) were combined in front of the first roller, and (A) was not subjected to heat plate treatment, but both were stretched at 3.27 times between the first roller and the second roller. After stretching, both yarns were stretched to 0.
In a relaxed state of 991 times, the fibers were entangled and mixed using an entangling nozzle with an air pressure of 10 kg/-, and wound up at a speed of 800 m/min. The obtained mixed fiber yarn was stable, with no fuzz or large loops, and an average entanglement length of 23 cm.

The obtained entangled mixed fiber yarn was given an additional twist of 600 T/m, and the weft-beating woven fabric was heated with benzyl alcohol for 10 minutes.
As a result of the minute treatment to make the splittable fibers into fine fibers and then dyeing, the polyester fibers in the mixed yarn shrink and the split fine fibers are exposed on the surface, giving it a slightly hard texture.
A fabric with bulkiness and a soft cotton-like touch was obtained.

Further, the water production shrinkage percentages of the drawn yarns (A) and (B) separately wound from the 20th roller in the same process were 14% and 7%, respectively.

Comparative Example 1 The other conditions were exactly the same as in Example 1, and both (A) and (B) were subjected to the same heat plate treatment as in (B), resulting in water production shrinkage rates of 8% and 7%, respectively. The fabric finally obtained was hard in both hand and touch, lacked soft touch, and had low bulkiness.

<Example 2> Bright undrawn yarn with an elongation of 260%, 94 denier, 18 filaments, which was spun using a polyester polymer modified with 10 moles of iso-7 tar acid at a winding speed of 200 GIn/min by a conventional method. (A) and a potentially splittable drawn yarn q produced by a multilayer composite spinning method of polyethylene 7-talate and its modified polymer were mixed during stretching by the method shown in FIG.

Here, the splittable fiber is a 9-layer parallel split cross-sectional conjugate fiber made of polyethylene terephthalate polymer and 5 moles of 5 moles of inktal acid and 5 modified polymers, obtained by conventional spinning and stretching methods. Elongation 26%, diving contraction rate 8
% plyte 75 denier 24 filament drawn yarn (
D). First, the undrawn yarn (A) is transferred to the first roller 1 (
Temperature: 85°C), second roller 2 (room temperature) and heating plate 4 between them (temperature: 120°C) K to draw at a stretching ratio of 2.
It is stretched 51 times. The underwater shrinkage rate of this drawn yarn is 19
%. After stretching, the yarn is in a relaxed state of 0.995 times,
The entangling process is carried out using the entangling nozzle between the second roller 2 and the third roller 30 with an air pressure of 2.5 kg/-, and the speed is 800.
Wind up at m/min. Here, the potentially splittable drawn yarn 0 is
2nd r: Introduced into 1-r, 20th-r and 30th-r.
The fibers are mixed and entangled with the yarn of A in the entangling nozzle between the yarns.

The obtained mixed fiber yarn was stable, free of fuzz and loops, and had an average entanglement length of 18 .

This mixed yarn was given an additional twist of 800 T0n, and the fabric was weft-beated and then boiled in a 3% caustic soda solution for 20 minutes, and then dyed to determine the texture.

A fabric that was soft to the touch and had high bulk was obtained.

<Example 3> The entangled mixed fiber yarn of 112.5 denier 42 filaments obtained in Example 2 was twisted at 2800 T/m, overfeed rate minus L8%, and heater temperature 210°C1.
False twisting was performed at a speed of 150 m for 7 minutes.

Similarly, after applying additional twist of 800 T0n and creating the fabric,
As a result of the dividing treatment, a fabric with higher bulkiness and softness was obtained.

[Brief explanation of the drawing]

FIGS. 1 to 4 are schematic diagrams illustrating the method of manufacturing the mixed fiber yarn of the present invention.

Claims (5)

[Claims] (1) Polyester drawn yarn with a boiling water shrinkage rate of 10% or more and potentially splittable fibers with a continuous water shrinkage rate of 10% or less are intertwined so that the blend ratio of the latter is 50 to 75%. A special blended yarn characterized by being a synthetic blend. (2) The special mixed fiber yarn according to claim 1, wherein the polymer for the drawn polyester yarn is an isophthalic acid-modified or sulfoisophthalic acid-modified polyester polymer. (3) The special mixed fiber yarn according to claim 1 or 2, wherein the drawn polyester yarn and the potentially splittable fibers have false twist crimp. (4) Spun and undrawn yarns for polyester drawn yarn and for potentially splittable fibers are drawn in the same drawing weight, with different heat treatments applied to give different heat set properties, and the boiling water shrinkage rate of the former is reduced. 10% or more, the boiling water shrinkage of the latter is 10% or less, and then the mixing ratio of the latter is 50 to 75%.
A method for producing a special mixed fiber yarn, which is characterized by doubling the yarn, performing an entanglement treatment, and winding it. (5) A claim characterized in that during or immediately after drawing the spun undrawn yarn for drawn polyester yarn, the already drawn potentially splittable fibers are introduced, intertwined, and mixed. 4. The method for producing the special mixed fiber yarn according to item 4.