JP2003306840A - Twistless yarn-like spun raw yarn and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twistless spun yarn which scarcely falls out constituting fibers in comparison with conventional twistless yarn, and to provide a method for producing the yarn at a low cost. <P>SOLUTION: This method for producing the twistless yarn-like spun raw yarn comprises twisting a spun yarn and a roving formed from staple fibers comprising a soluble raw material or a roving formed from staple fibers comprising a soluble raw material and staple fibers comprising an insoluble raw material in a direction opposite to the twisting direction of the spun yarn to produce the finely spun twisted union yarn. The twistless yarn-like spun raw yarn is produced by the method. The method for producing the fabric or fiber product comprising the twistless yarn-like spun yarns comprises subjecting a fabric produced from the twistless yarn-like spun yarn raw yarns to a dissolution treatment to dissolve the soluble component in the twistless yarns. The fabric or fiber products comprises the twistless yarn-like spun yarns obtained by the production method. <P>COPYRIGHT: (C)2004,JPO

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 a non-twisted yarn-like spun yarn and a non-twisted yarn-like spun yarn produced by the method.

[0002]

2. Description of the Related Art As one of the methods for producing a non-twisted spun yarn, a spun yarn and a water-soluble filament are twisted in a direction opposite to the twisted direction of the spun yarn with a plying machine to form a plied yarn. There is known a technique for producing a soft untwisted yarn-like product in which the twist is released by manufacturing, weaving and knitting using this plied yarn, and then dissolving and removing the water-soluble filament by hot water treatment. When used in piles and loops, the untwisted yarn produced in this manner tends to fall off due to washing and the like, and tends to have poor wear resistance. Further, since the water-soluble filament and the spun yarn are twisted together, the manufacturing cost becomes high.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a non-twisted spun yarn in which constituent fibers are less likely to fall off as compared with a conventional non-twisted yarn, and a manufacturing method therefor at a lower cost.

[0004]

According to the present invention, a roving and a spun yarn composed of short fibers made of a soluble raw material are twisted in a direction opposite to the twisting direction of the spun yarn and finely spun and twisted. The present invention relates to a method for manufacturing a twisted yarn spun raw yarn. Further, the present invention performs fine spinning and twisting by twisting a roving and a spun yarn composed of a short fiber made of a soluble raw material and a short fiber made of an insoluble raw material in a direction opposite to the twisting direction of the spun yarn. The present invention relates to a method for producing a non-twisted yarn-spun raw yarn. Furthermore, the present invention relates to a non-twisted yarn-spun raw yarn produced by any one of the above methods. In addition, the present invention comprises a non-twisted yarn-like spun yarn obtained by subjecting a woven fabric or a knitted fabric produced using the non-twisted yarn original yarn to a dissolution treatment to dissolve and remove soluble components in the non-twisted yarn. The present invention relates to a method for producing a dough or a textile product and a dough or a textile product made of a twist-free spun yarn obtained by the method.

In the present invention, the "untwisted yarn-spun raw yarn" is a roving yarn composed of short fibers made of a soluble raw material, or a short fiber twist made of short fibers made of a soluble raw material and non-soluble raw materials. A spun yarn obtained by twisting one of the roving yarns and the spun yarn into a finely spun and twisted yarn. The "untwisted yarn-like spun yarn" means the above-mentioned "untwisted yarn-like spun raw yarn" in the spun yarn state. Alternatively, it refers to a thread in which soluble components have been removed by dissolution treatment in the state of being a fabric.

In the method for producing the untwisted yarn-spun raw yarn of the present invention, the manufacturing process can be simplified in the following points, so that the manufacturing cost can be reduced as compared with the conventional untwisted yarn manufacturing method. That is, in the conventional method for producing a twist-free spun yarn, a spun yarn made of soluble fiber and a spun yarn for untwisting are applied to a splicing / plying machine. It is only necessary to twist the spun yarn with the spun yarn in the spinning process, and there is an advantage that the splicing yarn and the twisting process can be eliminated. In addition, the untwisted yarn produced in the second aspect of the present invention, which uses short fibers made of a soluble raw material and short fibers made of a non-soluble raw material as the roving, uses the fibers of the soluble raw material in the processing step. When dissolved and removed, the surface of the spun yarn untwisted in the fine spinning intertwisting process is covered with the fibers of the insoluble raw material, so that the characteristic feature is that the falling of the fibers is suppressed as compared with the spun yarn in the untwisted state. It

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the untwisted yarn tone means
Not only completely untwisted yarns, but also spun yarns that have a lesser degree of twist than conventional twisted yarns and can give a softer feel when compared to conventional twisted yarns when made into a woven or knitted fabric.
Further, the roving yarn means a group of relatively elongated fibers made from a sliver made by a kneading machine by a roving machine, and the spun yarn means a yarn made from the roving by a spinning machine.

A method for producing a non-twisted yarn-spun raw yarn according to the present invention,
This will be described with reference to FIG. A single roving or a mixed fiber roving 11 obtained by dissolving and removing short fibers or insoluble short fibers therein to a roving stage in a normal spinning process is supplied to a back roller 21 through a trumpet 24 and a front roller 23. And the draft is applied due to the difference in surface speed between the rollers. On the other hand, the twisted spun yarn 12 spun in the normal spinning process is a spun yarn and is therefore supplied directly to the front roller without being drafted. At this time, the draft fleece of the roving 11 and the spun yarn 1
No. 2 is supplied to the front roller in a state of maintaining a certain interval, and is spun and twisted at the stage of being twisted while being wound around the bobbin 31. The twisting here is carried out so that the twisting direction is opposite to the twisting direction of the spun yarn 12, so that the spun yarn 12 is untwisted more or less in the spun twisted yarn 12, and the roving 11 is further formed thereon. Is wrapped around.
If the dissolution removal treatment is performed in this state, the roving yarn or the soluble fiber component therein is removed, and the untwisted yarn-like spun yarn or the untwisted yarn-like spun yarn in which the non-soluble short fibers in the roving are wound around the spun yarn Yarn is obtained.

The knitted or woven fabric using the above-mentioned untwisted yarn-like spun raw yarn and then subjected to dissolution removal treatment, which is made of untwisted yarn-like spun yarn and has a soft and soft texture. Alternatively, textile products can be manufactured. In this product, when the number of reverse twists added to the spun yarn 12 is small, the degree of untwisting is small and the untwisted yarn texture is weak.

In the present invention, the short fibers made of a soluble raw material include fibers which can be dissolved and removed by water or an aqueous alkaline solution or other solvent or solution, and fibers which can be removed by decomposition. As the soluble fiber that can be removed by dissolution, for example, water-soluble polyvinyl alcohol fiber, alkali-soluble polyester fiber, or the like can be used. Therefore, the soluble fiber can be dissolved and removed by hot water, water or alkali. As the water-soluble fiber, water-soluble polyvinyl alcohol fiber is particularly preferable. Further, as the fibers constituting the twisted spun yarn 12 which is one of the raw materials, polyester fibers, polyacrylic fibers, rayon fibers, synthetic fibers such as cotton, wool, silk, hemp and the like or natural fibers can be appropriately selected. it can.

When a mixed yarn of soluble short fibers and non-soluble short fibers is used as the roving, the mixing ratio of soluble short fibers and non-soluble short fibers is 1: 1 to 5: 1 by weight, preferably 3 :.
2-3: 1. If the mixing ratio of the soluble short fibers and the non-soluble short fibers in the roving is less than 1: 1 and the ratio of the soluble fibers becomes smaller, the texture of the final product will not be sufficiently soft,
On the contrary, when the ratio is larger than 5: 1, the effect of preventing the fibers from falling off decreases. Non-soluble fibers include polyester fibers, polyacrylic fibers, rayon fibers, cotton, wool, silk,
A synthetic fiber such as hemp or a natural fiber can be appropriately selected.

[0012]

EXAMPLES The present invention will be described in more detail and more specifically below with reference to examples. Example 1 A roving yarn composed of a cotton fiber and a water-soluble vinylon short fiber in a weight ratio of 3: 2 and a 100% cotton spun yarn (twist number 17 times / inch)
20 single yarns of No. 20 are combined in a weight ratio of 80:20 and subjected to a spinning process, and the 100% cotton spun yarn (20 single yarns) is twisted in a direction opposite to the twisting direction at 14 twists / inch. An untwisted yarn-like spun raw yarn having a deep-moving count of 16 was prepared. The thread was used in a pile of towels to make a towel. With respect to the prepared towel, water absorption performance, fluff removal property and texture were evaluated. The performance evaluation results are shown in Table 1.

The respective evaluation methods are as follows: [Fuzz repellency] JIS L 0217-10 described below.
The procedure was carried out according to Method 3. Water with a liquid temperature of 40 ° C was added up to the top water level of the water tank of the test equipment of the household electric washing machine (NA-W40Y20 manufactured by National Co., Ltd.), and 1 g of water was added to this to synthesize 2 g of clothing at a rate of 2 g. A detergent is added and dissolved to obtain a washing liquid. A sample and optionally a load cloth are put in this washing liquid so that the bath ratio becomes 1:30, and the operation is started. 5
After the treatment for a minute, the operation is stopped, the sample and the load cloth are dehydrated by a dehydrator, the washing liquid is replaced with fresh water at room temperature, and the same bath ratio is rinsed for 2 minutes. When finished, dehydrate again, rinse again for 2 minutes, dehydrate and dry. The fluff is collected during this step, the dry weight is weighed, divided by the weight of the original sample and multiplied by 100 to calculate%. [Water absorption performance] Based on the improved run-out method (described in the technical data No. 4, 1994, reported by Osaka Prefectural Institute of Advanced Industrial Science and Technology). [Texture] Feeling evaluation by human. The criteria for determining the texture are as follows: ◎: very soft, ◯: soft, Δ: rather hard, ×: hard.

Comparative Example 1 100% cotton fiber spun yarn used in Example 1 (20th count)
And a water-soluble vinylon filament (75d / 20f) were put into a plying machine to produce a ply-twisted yarn by twisting 14 times / inch in a direction opposite to the twisting direction of the cotton spun yarn. A towel was prepared using this yarn in the same manner as in Example 1, and its performance was evaluated in the same manner as in Example. The evaluation results are shown in Table 1.

As a comparison, the performance of a towel (Comparative Example 2) prepared by using a cotton spun yarn having a twist number of 17 times / inch used in Example 1 which is a normal spun yarn (Comparative Example 2) was also evaluated. Is shown in Table 1.

[0016]

[Table 1]

[0017]

EFFECTS OF THE INVENTION The fabric composed of the untwisted yarn-like spun yarn obtained by the method of the present invention is different from the fabric obtained from the conventional spun yarn in that it has a soft texture and is a drawback of the untwisted yarn. Since it does not come off or fall off, it is useful as a towel or underwear. Further, the method for producing a non-twisted yarn-spun raw yarn according to the present invention can be produced at a lower production cost than the conventional method of twisting with soluble long fibers.

[Brief description of drawings]

FIG. 1 is a process schematic diagram showing a manufacturing process of a twist-free spun yarn of the present invention.

[Explanation of symbols] 1: Untwisted yarn-like spun yarn 11: raw material roving, 12: Raw material spun yarn, 21: Back roller, 22: Apron roller, 23: Front roller, 24: trumpet, 31: Bobbin.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Edamatsu             1-8-1, Shioyamachi, Marugame, Kagawa Kurashiki             Spinning Co., Ltd. Marugame Factory F-term (reference) 4L036 MA04 MA05 MA35 MA39 PA21                       PA31 UA21                 4L048 AA18 AA20 AB01 AB12 AC19                       BA23 DA01 DA14

Claims (7)

[Claims] 1. A method for producing a non-twisted yarn-like spun original yarn in which a roving and a spun yarn composed of short fibers made of a soluble raw material are twisted in a direction opposite to the twisting direction of the spun yarn and finely spun and twisted. . 2. A roving and a spun yarn composed of a short fiber made of a soluble raw material and a short fiber made of an insoluble raw material are twisted in the direction opposite to the twisting direction of the spun yarn and finely spun and twisted. Manufacturing method of twisted yarn. 3. The method for producing a twist-free spun yarn according to claim 1, wherein the short fiber made of a soluble raw material is a water-soluble vinylon fiber. 4. The method for producing a non-twisted yarn-spun raw yarn according to claim 1, wherein the staple fiber made of a soluble raw material is a soluble polyester fiber. 5. An untwisted yarn-spun raw yarn produced by the method according to any one of claims 1 to 4. 6. A dough or a fiber made of a twist-free spun yarn obtained by dissolving the dough produced by using the untwisted yarn-spun raw yarn according to claim 5 to dissolve and remove soluble components in the untwisted yarn. Product manufacturing method. 7. A fabric or a fiber product made of a twist-free spun yarn obtained by the method according to claim 6.