JPH06330429A - Spun yarn with soft feel and production thereof - Google Patents

Abstract

PURPOSE:To obtain the spun yarns of high uniformity and soft handle and drape by regulating the feed of plural fiber bundles moving in parallel with one another at intervals so that the fibers held by both ends at the front roller nip point and fiber bundle confluence point account for a specified value or greater. CONSTITUTION:In feeding the draft section of a fine spinning machine with two fiber bundles, at an interval of D, of staple fibers each >=2.5g/de in tenacity and 27-55mm in mean length, it is ensured that the fibers held by both ends at the nip point on a front roller 2 and the confluence point for said two fiber bundles come to >=40wt.% of the whole fiber bundles. At the confluence point, the resultant combined spun yarns are subjected to real twisting at a twist multiplier of 1.5-2.8 to obtain the objective combined spun yarns satisfying the relationship: 102-1.23L<=N (N is constituent fiber count in the final spun yarn; L is mean single fiber length).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun yarn for clothing, which comprises two staple fiber bundles wound around each other. More specifically, the present invention relates to a spun yarn for clothing, which is excellent in yarn uniformity and soft with less fluff. The present invention relates to a spun yarn having various textures.

[0002]

2. Description of the Related Art Conventionally, as a spun yarn having a soft texture to be used for woven fabrics and knits for clothing, various studies have been made in the direction of reducing the twist, but the tenacity, the deterioration of the yarn quality and the lack of operability are Stability remains a major issue, and the current situation is that a yarn with a soft texture has not yet been obtained. Therefore, as an attempt to make full use of the characteristics of the raw materials, a mixed yarn using fine denier, a core yarn in which fine denier staple fibers form a sheath portion and a filament yarn forms a core portion, and a composite yarn using different shrinkage fibers or high shrinkage fibers, etc. However, in each case, it was difficult to sufficiently bring out the characteristics of the fiber due to the binding force due to the twist. And, there is a yarn in which the water-soluble vinylon yarn is melted after untwisting the twisted yarn of the spun yarn and the water-soluble vinylon yarn, but this yarn has a very high cost and its use is limited to high-grade products. It has only been used in part.

[0003]

SUMMARY OF THE INVENTION The present invention has less fluff that cannot be obtained by the conventional spun yarn as described above,
An object of the present invention is to provide a spun yarn having a beautiful yarn and a soft texture with excellent gloss.

[0004]

The present invention adopts the following means in order to solve the above problems. That is, the present invention is a spun yarn in which two staple fiber bundles are wound around each other and twisted with a twist coefficient of 1.5 to 2.8, and the staple fiber constituting the spun yarn is provided. Has an average fiber length of 27 to 55 mm and a fiber strength of 2.5 g / d or more, and the number N of constituent fibers of the spun yarn and the average fiber length L of the staple fibers satisfy the following formula. A spun yarn having a soft texture. 102-1.23L ≤ N (1)

Further, according to the present invention, in a method for producing a spun yarn by twisting two staple fiber bundles so that they are wound around each other, an average fiber length of 27 to 55 mm and a fiber strength of 2.
When two staple fiber aggregates composed of 5 g / d or more staple fibers are supplied to the draft section of the ring spinning machine, the interval between the staple fiber aggregates is set to the front roller nip point and the confluence point of the two fiber bundles. A method for producing a spun yarn having a soft texture, characterized in that the staple fiber grasped by the method is supplied so that the ratio of the staple fibers is 40% by weight or more, and a real twist having a twist coefficient of 1.5 to 2.8 is applied. Is.

The present invention will be described in detail below. Since the spun yarn of the present invention is a spun yarn in which two staple fiber bundles are wound around each other, the variation in twist angle is small, and the disorder of the fibers in the inner and outer layers is small, so the yarn has high tenacity and uniformity. It is a yarn with good fluff and less fluff.

Further, the tightness of the yarn makes the yarn compact, and even if the number of twists during twisting is reduced, the strength of the spun yarn is less than that of a normal ring spun yarn. For that purpose, the staple fiber has a fiber length of 27 to 55 mm and a fiber strength of 2.5 g / d or more, preferably 2.8 g / d or more. If the average fiber length is less than 27 mm, the strength is reduced, the number of fluffs is increased, and the operability is unstable, which is not preferable. On the other hand, if it exceeds 55 mm, the number of fluff is extremely reduced and a soft texture cannot be obtained, which is not preferable. Further, if the fiber strength is less than 2.5 g / d, the strength is lowered, and if the number of twists during twisting is lowered, the operability is remarkably lowered, which is not preferable.

Next, the twisting coefficient K during twisting is preferably 1.5 to 2.8 in inches. This is not preferable in terms of yarn quality, because a yarn having a soft texture cannot be obtained.

Further, the number N of fibers constituting the spun yarn of the present invention is N.
Needs to satisfy 102−1.23L ≦ N. When the number N of constituent yarns is 102-1.23> N, the yarn strength is lowered, the yarn quality is extremely deteriorated, and the operability is remarkably lowered, which is not preferable.

In addition, the fluff of spun yarn of 1 mm or more is 200
Having a fluff index in the range of ~ 900 co / 10 m
It is preferable because the gloss of the knitted fabric becomes very excellent.

Next, the method of the present invention will be described. FIG. 1 is a perspective view showing an example of an apparatus used for producing the spun yarn of the present invention. In FIG. 1, rovings S1 and S2 are unwound from shinomaki a and b, and trumpet 3 and After being supplied to the back roller 1 through the fourth roller 4, exiting from the front roller 2 through the second roller 5, the staple fiber bundles A and B are combined and twisted to form the spun yarn Y. Here, 6 is a snail wire, and D is the distance between two fiber aggregates.

FIG. 2 is an enlarged view of the front roller of FIG. In FIG. 2, when the two fiber aggregates are fed to the draft section of the ring spinning machine, the distance D between the fiber aggregates is set to the front roller nip point of the front roller 2 and the confluence point of the two fiber aggregates. It is necessary to supply so that the ratio of fibers grasped at both ends is 40% by weight or more.

In FIG. 2, when the spinning tension of T (L) is applied to the spun yarn, the tension T (l) applied to the l portion is T (l) = T
It is represented by (L) / 2cosα. Therefore, the tension applied to the portion becomes 1/2 or more of T (L), and the staple fiber bundle in the 1 portion has a smaller number of twists and a lower strength than the spun yarn after joining. Therefore, it is a necessary condition at the time of spinning that the strength of the fiber bundle up to the front roller nip point and the joining point can withstand the spinning tension.

Therefore, it is preferable that the ratio of the fibers held at both ends of the front roller nip point and the confluence point of the two staple fiber bundles is 40% by weight or more. 40% by weight
If it is less than the above range, the binding force due to the twist is small and the operability is remarkably reduced, which is not preferable. The ratio of the fibers gripped at both ends of the front roller nip point and the confluence of two staple fiber bundles is determined by the distance between the fiber aggregates supplied to the draft section, the number of twists at the time of twisting, and the fibers used as raw materials. It depends on the length. This is because the distance between the front roller nip point and the merging point changes depending on the distance between the fiber aggregates and the number of twists during twisting.

When a staple fiber bundle is gripped in an arbitrary cross section based on the raw material used, the length distribution (fibrogram) of only one of the gripped fibers and l can be easily used to determine the front roller nip point and two staples. It is possible to read the percentage of fibers gripped at both ends of the confluence of the fiber bundle.

Further, the twisting number K at the time of twisting has a twisting coefficient K of 1.5.
~ 2.8 is preferred. When the twisting coefficient is less than 1.5, as described above, becomes extremely long, so that the ratio of fibers held at both ends of the front roller nip point and the confluence of two staple fiber bundles becomes 40% by weight or more. It becomes difficult to keep the workability, and the operability is remarkably deteriorated to make spinning difficult. On the other hand, if it exceeds 2.8, a spun yarn having a soft texture cannot be obtained. From this point of view, the twist coefficient is preferably 1.8 to 2.6.

Further, the staple fiber preferably has an average fiber length of 27 to 55 mm and a fiber strength of 2.5 g / d or more. The reason for this is to produce a yarn with high strength and less fluff under a stable operation.

[0018]

【Example】

Example 1, Conventional Example 1 As staple fibers, cotton fibers mainly composed of rice cotton are used,
A spun yarn 30's of the present invention was manufactured using the apparatus shown in FIG. At this time, the average fiber length of the cotton fibers was 32 mm, and the fiber strength was 4.0 g / d. Then, the distance D between the two fiber aggregates is adjusted to be 6 mm, and the number of twists is 13.7 T / in. A true twist with a twist coefficient of 2.5 was applied and wound on a bobbin.

At this time, the ratio of the fibers held at both ends of the front roller nip point and the confluence of the two staple fiber bundles was 58%, and the number of constituent fibers was 110. A knitted fabric was knitted with a 22-gauge circular knitting machine using the spun yarn to give a dyeing finish. The knitted fabric had a very soft tactile feel and a glossy appearance with excellent uniformity. was gotten.

Further, in order to compare the characteristics of the above-described spun yarn having a soft texture of the present invention with the conventional spun yarn, a spun yarn Ne30 'made of the same material as in Example 1 described above, that is, a cotton fiber mainly composed of rice cotton is used. Table 1 shows the results of comparison of the characteristics of the cloth and the yarn, which were produced by making s, and making the same knitted fabric.

[0021]

[Table 1]

In Table 1, the tenacity of single yarn (g) is tensilon, and the yarn uniformity (U%) is Ibnestestar UT / III.
The type, the number of fluff (1 mm or more) is F / index tester, and the gloss is measured by the Jeffries method.
Abrasion resistance is a result of abrasion for 5 hours with a pilling tester and is shown by a pilling grade, and the larger the number is, the more durable the pilling is. The slope (%) is the slope measured after 10 times of repeated washing, and the closer the value is to 0, the smaller the slope. The texture (softness) and the uniformity of the knitted fabric are based on sensory evaluation. ◎ is very good, ○ is good, Δ is normal, × is bad, and evaluated by 7 people. The most evaluated grade value is shown.

As shown in Table 1, the spun yarn according to the present invention was excellent in yarn uniformity and had less fuzz. In addition, the knitted fabric according to the present invention has a soft texture, exhibits excellent luster, and has excellent abrasion resistance (pilling performance).

Example 2 A spun yarn was produced by changing the twisting coefficient in Example 1 to 1.0, 1.5, 2.5 (Example 1 itself) and 3.0,
The effect of actual twist was investigated and is shown in Table 2.

[0025]

[Table 2]

As is apparent from Table 2, ┗1 was not spinnable, and ┗4 was out of the soft texture, which was not preferable. As a result, the twist coefficient was preferably 1.5 to 2.8.

[0027]

EFFECT OF THE INVENTION The spun yarn of the present invention is excellent in yarn uniformity and has a soft texture with less fluff.
According to the method of the present invention, such spun yarn can be reliably manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus used in a manufacturing method of the present invention.

FIG. 2 is an enlarged plan view of the vicinity of the front roller of FIG.

[Explanation of symbols]

 S1, S2 roving 1 Back roller 2 Front roller A, B Staple fiber bundle Y Spun yarn

Claims (2)

[Claims] 1. A spun yarn composed of two staple fiber bundles wound around each other and twisted with a twist coefficient of 1.5 to 2.8, wherein the staple fiber constitutes the spun yarn. Is an average fiber length of 27 to 55 mm and a fiber strength of 2.5 g /
A spun yarn having a soft texture, which has a d or more and the number N of constituent fibers of the spun yarn and the average fiber length L of the staple fibers satisfy the following formula. 102-1.23L ≦ N (1) 2. A method for producing a spun yarn by twisting two staple fiber bundles so as to be wound around each other, and comprising staple fibers having an average fiber length of 27 to 55 mm and a fiber strength of 2.5 g / d or more. Two staple fiber aggregates,
When supplying to the draft section of the ring spinning machine, the staple fiber aggregates are held at a distance of 4 between the front roller nip point and the confluence of two fiber bundles.
It is supplied so as to be 0% by weight or more, and the twist coefficient is 1.5 to 2.
8. A method for producing a spun yarn having a soft texture, which comprises applying a real twist of 8.