JPH06257027A - Compound yarn and its production - Google Patents

Abstract

PURPOSE:To obtain compound yarn having excellent abrasion resistance, little fluffs and uniform texture and to provide a process for producing the yarn. CONSTITUTION:The compound yarn is composed of mutually twined fiber bundle A and fiber bundle B, wherein the fiber bundle A consists of blended staple fibers and filaments and the fiber bundle B consists exclusively of staple fibers. The weight ratio of the bundles A and B (A/B) is 0.4-2.3 and the yarn has 150-500 fluffs of >=1mm long per 10m. The present invention relates also to the process for the production of the yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite yarn for clothing, and more particularly to a composite yarn having excellent wear resistance, less fluff and excellent uniformity, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various developments have been made on composite yarns of short fibers and filaments, and there are various forms of obtained composite yarns. For example, a core yarn in which filaments are bundled and positioned at the core of a short fiber group, a composite yarn in which a filament yarn is opened and mixed with a short fiber group, and the like can be given.

[0003]

However, although such composite yarns have respective excellent points, they are still insufficient. That is, although the core yarn in which the filaments are bundled and located at the core of the short fiber group has a moderate value for the strength, the compatibility between the filament and the short fibers, the bonding is poor, and the tying force and abrasion resistance are low. It has the problem of being considerably poor.

Further, although the composite yarn obtained by opening the filament yarn and mixing it into the short fiber group has good conjugation property,
It has problems such as fluffiness due to filament spread and deterioration of uniformity.

The present invention eliminates the above-mentioned drawbacks of the conventional composite yarns, is excellent in new abrasion resistance, has less fluff, and has a good evenness of the yarn. The present invention provides a high-quality composite yarn having the following and a method for producing the same.

[0006]

The present invention adopts the following means in order to solve the above problems. That is, the present invention provides a fiber bundle A in which short fibers and filaments are mixed.
And a fiber bundle B composed of only short fibers are wound around each other, and the composition ratio A / B of the fiber bundle A and the fiber bundle B is 0.4 to 2.3 by weight. Within range, 1m
A composite yarn characterized by having a fluff of m or more in the range of 150 to 10 m to 500 to 10 m is used as the means.

Further, according to the present invention, two short fiber aggregates are supplied to a back roller at regular intervals, and after the back rollers and the front rollers are parallel-drafted, one short fiber aggregate after drafting is fed. The multifilament yarns are opened and superposed on the body and mixed, and in the twisting zone after the front roller, the fiber bundle in which the short fibers and the filaments are mixed, and the other fiber bundle consisting of the short fibers are mixed. The method is a method for producing a composite yarn, which is characterized by twisting.

The present invention will be described in detail below. The reason why the fiber bundle A in which short fibers and filaments are mixed is used is to improve the compatibility and conjugation between the filaments and the short fibers. Also, a fiber bundle B consisting of the fiber bundle A and short fibers only
And are wound around each other in order to further improve the wear resistance.

Further, the composition ratio A / B of the fiber bundle A and the fiber bundle B must be in the range of 0.4 to 2.3 in weight ratio. This is to improve the wear resistance and to obtain the uniformity of the yarn with less fluff, and when it is less than 0.4, the wear resistance is deteriorated, which is not preferable, while when it exceeds 2.3, the fluff is reduced. It is not preferable because the uniformity of the yarns is often decreased.

The proportion of filaments in the fiber bundle A is preferably 20 to 80% by weight. If it is less than 20% by weight, the conjugation property and the abrasion resistance are likely to be lowered, while on the other hand, 80% by weight
If it exceeds, the compatibility between the filament and the short fiber is deteriorated, and it is greatly affected by the spread of filaments, which causes the fluff and the uniformity of the yarn to be reduced, which is not preferable.

Further, with a fluff of 1 mm or more, 150 pieces / 1
It must have fluff in the range of 0 m to 500 co / 10 m. If the fluff is in this range, the fluff will be small. The fluff was measured by an F-index tester manufactured by Shikishima Spinning Co., Ltd.

The short fibers used in the fiber bundle A and the fiber bundle B are natural fibers such as cotton fibers and hemp fibers,
Examples include staples such as recycled fibers such as polynosic fibers, semi-synthetic fibers, polyester fibers, polyamide fibers, and synthetic fibers such as polyacrylonitrile fibers.
The thickness of the short fibers is preferably 3 denier or less, and further 2
Denier or less is particularly preferable, and the average fiber length of the short fibers is
28-44 mm is preferable.

As the filaments contained in the fiber bundle A, all filament materials such as polyester fibers, polyamide fibers, polyacrylonitrile fibers and the like can be targeted. The thickness of the filament is 0.2
A denier of up to 4.0 denier is preferable, and if it is less than 0.2 denier, abrasion resistance decreases, and if it exceeds 4.0 denier, defects such as fluffiness and texture due to poor opening tend to occur. .

Next, the manufacturing method of the present invention will be described.
First, in FIG. 1, two short fiber aggregates, for example, roving yarns 1 and 2 unwound from roving yarn bobbins P1 and P2 are set at a constant interval D.
It is preferably supplied to the back roller 4 of the spinning machine at intervals of 4 to 10 mm. This is to increase the parallelism of the fibers to reduce the fluff and at the same time to improve the abrasion resistance. If it is less than 4 mm, the effect of increasing the parallelism of the fibers and improving the wear resistance by wrapping and twisting the fiber bundles of each other becomes small. On the contrary, if it exceeds 10 mm, the yarn breaks during spinning. And the spinnability deteriorates, which is not preferable.

Next, the back roller 4 to the front roller 9
After parallel drafting between them, the drafted short fiber aggregates are twisted with each other in the twisting zone C after the front roller 9. At this time, the multifilament yarn 3 unwound from the pan P3 is opened by an opening device, for example, an electric opening device 10, and is superposed on the drafted short fiber assembly (front of FIG. 1) and mixed. To do. By doing so, a composite yarn in which the fiber bundle A and the fiber bundle B are wound around each other can be obtained. As the fiber opening device, in addition to the above-mentioned electric fiber opening device, there are mechanical fiber opening devices such as tension and relaxation methods, and air fiber opening devices, but high voltage is used because stable fiber opening is obtained. An electric fiber opening device using is preferred. 5, 6, and 7 are guides, 8 is a second roller, 11 is a snare wire, 1
2 is a composite yarn.

[0016]

EXAMPLES The present invention will be described in detail below based on examples. The measuring method used is as follows. Strength, elongation at break: JIS L-1095-1979
It was measured with a constant speed extension type tensile tester (tensor rapid manufactured by Zellweger Worster) of (General spinning test method) at a gripping interval of 50 cm and a pulling speed of 30 cm / min. Fluff: Fluff (1/10 mm) of 1 mm or more was measured with an F-index tester manufactured by Shikishima Spinning Co., Ltd. Yarn uniformity (U%): Measured with an Ibnestestar UT-III type. Tying ability (number of times): Tying ability was measured by a warp tying ability tester (Hirata Riken). This warp binding force tester rotates a circular drum of titanium surface having a diameter of 20 cm at 80 times / min, fixes one end of the yarn, and applies a load of 70 g to the other end to bring the drum into contact with the drum. It represents the number of rotations until the cutting, and expresses the degree of tying force. Dyeing surface: It is based on a sensory evaluation of a piece of cloth which is dyed in plain weave on the cotton side after the yarn is knitted in plain weave, and is very good ◎, good ○, normal △, bad × by 7 people It was evaluated and indicated by the most evaluated grade value. Smear due to washing: A fabric in which the yarn was knitted in a plain cloth was washed 10 times, and the degree of roughness due to fluff on the surface of the cloth was measured by the same evaluation method as for the dyed surface. Operability: It represents the situation of yarn breakage in the spinning process.

Example 1 Two rovings (50 gelen / 15 yds) made of cotton fiber were used.
The paper is fed to the back rollers with a space of 8 mm and is fed to the draft zone (back roller to front roller) at 42 mm.
Double draft, with 5 polyester multifilament yarns (30d / 18f) on one short fiber aggregate.
A voltage of KV was charged, the fibers were opened, and the layers were superposed. Then twist with a twist coefficient of 4.5 (inch type), and wrap the two fiber bundles from the front roller around each other to 40'S / 1.
(English cotton count) spun yarn was produced. The weight ratio A / B of the fiber bundle A and the fiber bundle B was set to 1.6. The results are shown in Table 1.

Example 2 A spun yarn was produced in which the spacing was changed from 8 mm in Example 1 to 6 mm. Similarly, the results are shown in Table 1. The weight ratio A / B was also set to 1.6.

Comparative Example 1 In the fiber bundle A in Example 1, 30 gelene / 15 yds
10d / 6f polyester multifilament yarn is used together with the cotton roving of
Using 8 pellen / 15 yds cotton fiber roving, a draft of 61.6 times and a weight ratio A / B of 0.3 were produced, and spun yarn of 40'S / 1 (English cotton count) was produced. The other conditions were the same as in Example 1.

Comparative Example 2 49 bundles / 15 yds of fiber bundle A in Example 1
Of cotton roving, polyester multifilament yarn of 30d / 18f, and fiber bundle B is 30 gelen / 15yds
Spun yarn of 40's / 1 (English cotton count) with a draft of 32.7 times and a weight ratio A / B of 2.4 was produced by using the cotton fiber roving. The other conditions were the same as in Example 1.

Comparative Example 3 Spinning was carried out in the same manner as in Example 1 except that the distance between the two rovings was set to 2 mm.

Comparative Example 4 Spinning was carried out in the same manner as in Example 1 except that the interval between the two roving yarns was 12 mm.

Conventional Example 1 Cotton fiber roving yarn (100 gellens / 15 yds) is drafted, and the polyester multifilament yarns 30d / 18f are applied with a tension of 0.4 g / d immediately before the front roller and are drafted while being bundled. The woven roving, that is, the fleece, is spun on and spun and twisted with a twist coefficient of 4.5 (inch method) to produce a 40'S / 1 (English cotton count) core yarn, and the physical properties are similarly measured. The results are shown in Table 1.

Conventional Example 2 Cotton fiber roving (100 gellens / 15 yds) is drafted, and polyester multifilament yarn 30d / 18f is passed through an electrode charged with a voltage of 5 KV just before the front roller to open the fiber. This was mixed with the roving yarn being drafted and twisted with a twist coefficient of 4.5 (inch system) to produce a 40'S / 1 (English cotton count) composite yarn. Similarly, the physical properties are shown in Table 1.

[0025]

[Table 1]

As shown in Table 1, the composite yarn of the present invention is excellent in tying property and abrasion resistance, has little fluff, and has a good yarn evenness, and has a good dyed surface even when compared in a milling knitted fabric. There was little pilling, and there was also little burntness (the degree of fluff on the cloth surface after washing).

[0027]

INDUSTRIAL APPLICABILITY The composite yarn of the present invention is of high quality having excellent conjugation property, abrasion resistance, little fluff, uniform yarn and excellent overall performance, and its production. The method also has a remarkable effect of reliably obtaining the above-mentioned composite yarn.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus for producing a composite yarn of the present invention.

[Explanation of symbols]

 1, 2 roving thread 3 multifilament thread 4 back roller 9 front roller 12 composite thread

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D03D 15/00 Z 7199-3B

Claims (2)

[Claims] 1. A composite yarn in which a fiber bundle A in which short fibers and filaments are mixed and a fiber bundle B consisting of only short fibers are wound around each other, and the fiber bundle A and the fiber bundle B are combined. The composition ratio A / B is in the range of 0.4 to 2.3 by weight ratio,
150 fl / 10m-500 fl / 10 with 1mm or more fluff
A composite yarn having fluffs in the range of m. 2. Two short fiber aggregates are fed to a back roller at regular intervals, and after being drafted in parallel between the back roller and the front roller, one drafted short fiber aggregate is multifilament. In the twisting zone after the front roller, the yarns are opened, and the fibers are superposed and mixed.
A method for producing a composite yarn, which comprises twisting a fiber bundle in which short fibers and filaments are mixed, and a fiber bundle consisting only of the other short fibers.