JPH0214034A - Conjugate yarn - Google Patents

Abstract

PURPOSE:To obtain a conjugate yarn having uniform and firm covering and giving a dyed fabric having uniform color tone by making the twisting direction of a continuous yarn used as the core to be same as the winding direction of twisted short fiber of the sheath part and specifying the coverage of the sheath part. CONSTITUTION:A continuous yarn 10 is delivered from a clamping part of the small-diameter parts 7b, 9 of a front top roller. Separately, a short fiber roving 1 is passed through a guide 2 and back rollers 3, 3' and drafted between the front top roller 7a and a front shaft 8 to form a short fiber fleece 5. The fleece is united with the above continuous yarn 10 at a point separated 3-20mm from the nip point and wound round the continuous yarn to twist the yarn and obtain the objective conjugate yarn having a conjugate ratio of the continuous yarn to the short fiber component of preferably 10:90-90:10 and a coverage of >=80%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to composite yarns. More specifically, it relates to a composite yarn having a continuous yarn in the core and short fiber components in the sheath.

Conventionally, composite yarn technology with a core-sheath structure has been developed by devising front top rollers and front bottom shafts to feed rovings of the same or different types at different speeds, or by using the front roller shape as a cone and feeding them at different speeds. There are known methods for reducing the supply. Furthermore, a method of obtaining a yarn having a core-sheath structure by heat-treating two components, shrinkable fibers and non-shrinkable fibers, is also well known.

However, these methods not only do not provide a two-layer composite yarn with a core-sheath structure with satisfactory coverage, but also require complicated equipment.
Quality control, process control, and maintenance management were also difficult and stable production could not be expected.

The present inventors have arrived at the present invention as a result of intensive studies aimed at improving the prior art.

That is, an object of the present invention is to provide a composite yarn in which the short fiber component is uniformly and strongly (ζ-coated) in the continuous yarn of the core.

The object of the present invention is to provide a composite yarn consisting of a continuous yarn and a short fiber component, A. A continuous yarn is arranged in the center of the composite yarn and a short fiber component is arranged in the outer layer, and B. At least in the outer layer. The short fiber component is wound in a real twist around the continuous yarn, and the continuous yarn in the center has a real twist in the same real twist direction as the winding direction, and constitutes the short fiber component. This is achieved by providing a composite yarn characterized in that the single fibers are arranged substantially parallel to the actual twisting direction, and the coverage of the short fiber component constituting the C outer layer portion is 80% or more.

In the present invention, continuous yarn refers to continuous yarn such as filament yarn and spun yarn. Preferably, it is a filament yarn. This is because filament yarns having different properties from the staple fibers covering the outer layer have more desirable characteristics as composite yarns. The synthetic fiber filament yarn may be a stretched yarn, a semi-stretched yarn, or a mixture of a stretched portion, a semi-stretched portion, or an unstretched portion, etc., as appropriate and desired. Furthermore, the material of the continuous yarn may be any known yarn made of natural fiber silk, semi-synthetic fiber, or synthetic fiber, and it goes without saying that it may also be pre-shrunk yarn or cotton yarn. . Short fiber components include cotton, silk, and wool (
It refers to known short fibers consisting of natural fibers such as animal hair (including animal hair), hemp, etc., semi-synthetic fibers, and synthetic fibers, either alone or in a blend of each. The composite ratio of the continuous yarn and short fiber components of the present invention is 10:90 to 90:10 (
weight ratio), preferably 20:80 to 70:3
0 (weight ratio). If the composite ratio of either the continuous yarn or the short fiber component is less than 10%, the balance will deteriorate and this is not preferable.

Next, the composite yarn of the present invention will be explained using the drawings.

3 and 4 show a cross-sectional view and a side view of the composite yarn of the present invention, in which the continuous yarn 10 is arranged in the center of the composite yarn, and the short fiber component 5 is arranged in the outer layer. There is.

The short fiber component 5 is wound around the continuous yarn 10 in a real twist, and the short fibers constituting the short fiber component 5 are arranged substantially parallel to the real twist direction. Further, the coverage of the short fiber component 5 constituting the outer layer portion is 80% or more. The preferred value of such coverage is 90% or more.
The reason for this is that if the continuous yarn 10 in the core is completely covered, a fabric with a uniform color tone can be obtained after dyeing, and a high-quality coated yarn can be obtained. . If the coverage is less than 80%, unevenness will increase for this reason, which is not preferable.

The major feature of the composite yarn of the present invention is that the short fiber component in the outer layer is wound in a real twist around a continuous yarn, and the continuous yarn in the center is a real twist in the same direction as the winding direction. Because the central continuous yarn is twisted, the fibers that should form the outer layer are less likely to enter the center layer, creating a clear and good two-layer structure. It is possible to achieve a wide range of stratification. Therefore, the aforementioned high coverage rate (
80% or more), the combined purpose of both components can be reliably achieved to the desired goal. In other words, the fibers to form each of the outer periphery and center layer,
When using each specific fiber, the outer circumference of each fiber,
The effect of specifically arranging each of the central layers can be fully obtained. In particular, in the composite yarn of the present invention, since the single fibers constituting the short fiber component in the outer layer are arranged almost parallel to the real twist direction, the fibers originally tend to enter the central fiber layer, but as mentioned above, As shown in the figure, since the central continuous yarn has twist, it is possible to obtain two distinct layers, and at the same time, the quality and quality of the yarn and product are also extremely good. be.

Although the yarn of the present invention can clearly differentiate into two layers, this is due to the distribution and arrangement of the fibers.
This does not mean that the fiber layers of the center layer and the outer peripheral layer are likely to separate easily, but rather that the yarn of the present invention is a composite yarn that is well integrated.

Furthermore, FIGS. 5 and 6 show conventional composite yarns, in which it is difficult to bring the continuous yarns 10 completely to the core, and they always come out to the outer layer. For this reason, the continuous yarn 10 and the short fiber component 5 are combined in a side-by-side manner, so that the continuous yarn is inevitably exposed in the outer layer, making it impossible to improve the quality.

Next, the method for manufacturing the composite yarn of the present invention will be explained using the drawings.

FIG. 1 and FIG. 2 show one embodiment of the method for manufacturing composite yarn according to the present invention. First, the roving 1 is supplied to the back rollers 3 and 3' via the guide 2, and
. On the other hand, the continuous yarn 10 is sent out from the small diameter portion 7b of the front top roller and the gripping portion of the second front top roller 9. Then, the short fiber fleece 5 is wound around the continuous yarn 10 and twisted.

The twisting may be actual twisting or false twisting, but actual twisting is preferred.

The reason for this is that real twisting provides a cleaner coating, and that real twisting is easier to use when using a ring spinning machine.

The short fiber supply speed is 2 to 40% higher than the continuous yarn supply speed.
% faster is preferable. By doing this, the fleece 5 is over-fed compared to the continuous yarn, so that it is uniformly wrapped around the continuous yarn and coated. If it is less than 2%, the proportion of exposed continuous yarns will be high, which is undesirable, and if it exceeds 40%, the short fiber component in the covering portion will become sagging, which is not preferred. However, the above range of overfeed rate of 2 to 40% is applicable to continuous yarns such as ordinary raw silk multifilament, woolly processed yarn, Breillat processed yarn, interlaced yarn, steam jet crimped yarn, spun yarn, etc. When the continuous yarn is an elastic yarn, it is preferable that the feeding speed of the short fiber bundle is 2 to 70% faster than the feeding speed of the continuous yarn.

To explain further using FIGS. 1 and 2, 4°4' is an apron, 6 is a collector, 11 is a continuous yarn tension adjustment device, 12 is a yarn guide, and 13 is a second front top roller 9. A pressure device, 17 a composite yarn, 14 a snail guide, 15 a traveler guide, and 16 a winding bobbin. Although FIG. 2 shows a nip mechanism that supplies continuous yarn to the center and short fiber bundle fleece to both sides, the specific arrangement of the device is not necessarily limited to this. , it is also possible to use a nip mechanism that supplies the short fiber bundle fleece to the side closer to the center of the drawing and continuous yarns to both sides, which is the opposite of what is shown in the figure. The left-right relationship may always be the same, or the nip mechanism may be configured such that each spindle is separate and independent.

Furthermore, in this method, the point at which the continuous yarn 10 and the short fiber bundle fleece 5 join is 3 to 3 points from the nip point of the short fiber bundle fleece.
Approximately 20 mm is preferable. If it is at this level, the coverage will be improved.

Next, the device will be explained. The apparatus for manufacturing composite yarn according to the present invention is as explained in the explanation portions of FIGS. 1 and 2 above. That is, the front top roller of a spinning machine having a draft mechanism is used as a stepped roller for the large diameter section 7a and the small diameter section 7b, and a nip point is provided for each, and the fleece that has passed through the draft section is separated between the large diameter section 7a and the front shaft 8. The continuous right yarn 10 is arranged to be fed through the nip point between the small diameter portion 7b and the second front top roller 9. The circumference ratio between the large diameter portion 7a and the small diameter portion 7b of the front top roller is preferably such that the large diameter portion is 2 to 70% larger than the small diameter portion. Further, the roller width of each of the large diameter portion 7a and the small diameter portion 7b is preferably at least 5 mm or more. This is because even if the yarn path is slightly deviated, it will not easily deviate from the nip point.

The present invention can be applied not only to a normal yarn twisting machine or a designed yarn twisting machine, but also to bound spun yarn.

Furthermore, when a thread having elasticity such as wool thread or polyurethane thread is used as a continuous thread, it can be supplied while being stretched and stretched.

Moreover, a composite yarn having unique functionality such as antistatic properties and water absorption properties in the core component can be obtained.

Furthermore, by utilizing the principle of the present invention, multilayer yarns with two or more layers,
For example, if the stepped roller has three steps, a three-layer structure yarn, a four-layer structure yarn,
When layered, a four-layered yarn is obtained.

In addition, in this invention, coverage is calculated|required as follows.

That is, take an enlarged photograph of the side of the yarn for at least 0.5 m of the composite yarn length (the number of photographs and magnification for each 0.5 m of the composite yarn length may be set to any value that is easy to measure), The total yarn surface area and the coverage area of the short fiber component on the photograph are determined and determined, and from the numerical values, the coverage rate (%) = ((coverage area of the short fiber component) x 100)
/(total surface area of yarn). Then, this is done for five yarn parts, and the average value of these is taken as the coverage of the short fiber component in several parts.

Next, examples will be described.

Example 1 100D-48fi made of polyethylene tereftate
A composite spun yarn was obtained using the apparatus shown in FIGS. 1 and 2 using a woolly polyester yarn of 1 mm and a pill-resistant polyester staple of 3 d x 89 mm V (V: barrier pull cut).

In addition, the short fiber bundle fleece supply speed was overfeeded by 7% over the filament supply speed, and the spun yarn count Nm =
30 (Nm: metric count).

Furthermore, the twist coefficient K = 85 (T = KfKiX
T + number of twists (T/m), K: twist coefficient, Nm: metric count]. The mixing ratio of filaments and short fibers was 33.3:66.7 (weight ratio), respectively. Furthermore, the single fibers constituting the short fibers were approximately parallel to the actual twisting direction of the short fiber bundle. This single yarn is processed into double yarn (the twist direction is the opposite direction of the bottom twist, the number of twists is 95% of the number of bottom twists), and
/2/ A twill fabric was obtained. The fabric has anti-pilling properties (ICI
5 = grade 4 in 10 hours), with good surface quality,
The result is a wool-like product with plenty of waist, firmness, and volume, as well as just the right amount of stretch. Further, after dyeing, the coverage of the polyester staple as the outer layer component was measured and showed a good value of about 99%.

Example 2 Filament component Nia 5 was prepared using the same equipment as in Example 1.
D-241il woolly polyester yarn (30% by weight)
, Short fiber components: (1) Dispersion dyeable anti-pill polyester raw cotton 3d x 76 mm (35% by weight), ■ Normal pressure cation dyeable anti-pill polyester raw cotton 4d x 76 mm (35% by weight)
) and overfeeding the short fiber component by 5% to obtain a composite yarn with Nm=1/32.

Further, the twist condition was K=95. The coverage of this composite yarn was 98%, and the single fibers of the staple were almost parallel to the weaving direction of the short fiber bundle. This composite yarn is processed with double thread processing (
The number of twists was 100% of the number of twists in the opposite direction to the bottom twist direction to obtain 2/2/twill. The quality of the product is excellent as a thick fabric for autumn and winter, and because it is dyed with cationic dyes, it has good marbling. Also, the anti-pilling property is T
CI method, 10 hours gave a very good grade of 5-4. The product has excellent wash and wear properties, and has excellent waist, firmness, and heat retention properties.

Example 3 Under the same conditions as Example 1, 110D made of polyamide
- Anti-pill type 3D made of polyacrylonitrile with 24fil modified yarn as filament component
x89V (70% by weight) and merino type #58, roving consisting of 30% by weight of wool is used as the short fiber component, and the short fiber fleece and the filament are combined into 10% by weight of the short fiber fleece.
% overfeed due to the speed relationship, N
m = 24 were spun. The twist coefficient at this time is = 70
Met. Further, the mixing ratios of the filament component and short fiber component were 29.3% by weight and 70.7% by weight, respectively. The coverage rate of the obtained composite yarn was 94%.

When socks were made from the composite yarn using a 16G sock knitting machine, the socks had a smooth texture and a good quality. Moreover, a product with bulky properties and heat retention properties was obtained.

Example 4 Polyethylene terephthalate 15 was prepared in the same manner as in Example 1.
0D-30fil, using a roving made of wool yarn and carded sliver of rice cotton, the feeding speed of rice cotton fleece is over-feeded by 7% than the wool yarn, and Nec = 7S.
(Nec: British fine count) was spun. Twisting condition = 3.9 (T=KffecT: Twisting number (T/1nc
h) K: twist coefficient). The blending ratio of the spun yarn is filament component 19.7% and staple fiber component 8.0%. It was 3%. The coverage rate of this composite yarn was 99.5%. In addition, the single fibers at the end were arranged almost in the weaving direction of the short fiber bundle. Denim of 2/1/twill was made using the yarn obtained in this example. The resulting product was denim that had the feel of 100% cotton and had appropriate elasticity.

Example 5 Using the same method as in Example 1, using a roving made of polyurethane 70D card sliver with end tightening, it was combined so that the end tightening was 1.5 times faster than that of polyurethane, and Nec = 7
S (Nec: British style fine count) was made so that the stretch of the urethane was 4.0 times greater when combined. The coverage of the obtained composite yarn was approximately 100%. The yarn was woven with a denim design of 3/1/twill. The resulting product had the feel of 100% cotton as in Example 4, and was highly stretchable denim.

Example 6 Using the same material as in Example 4, a composite yarn was spun under the same conditions as in Example 4, except that the overfeed rate of the end fleece was 2.3%. The coverage of the resulting composite yarn was 83%, with 14% of the core filament yarns being exposed.

Although this yarn is inferior to the yarn of Example 4,
This was more preferable than conventional composite yarns.

Comparative Example 1 A composite yarn was spun under the same conditions as in Example 6, except that the overfeed rate of the end fleece was 1.8%. The obtained composite yarn had a coverage rate of 78%, which was comparable to that of conventional products.

On the other hand, when the yarn was spun with an overfeed rate of 41% for the end-tight fleece, the end-tight fleece was slack and only a composite yarn with extremely poor coverage was obtained.

Comparative Example 2 The stepped rollers shown in FIGS. 1 and 2 were not used, and only the front top roller 7a was used, and the filament was supplied under tension to the upstream side of the front top roller 7a. The materials and other materials were the same as in Example 6. The obtained composite yarn was as shown in FIGS. 5 and 6, and the coverage was 77%.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the composite yarn manufacturing apparatus according to the present invention, FIG. 2 is a front view of the combined portion of FIG. 1,
FIG. 3 is an enlarged view of a cross-sectional model of a composite yarn according to the present invention, and FIG. 4 is an enlarged view of a side model of FIG. 3. FIG. 5 is an enlarged side view of a conventional core spun yarn model, and FIG. 6 is a side view of FIG. 5. 1: roving, 5: short fiber component, 7a: large diameter portion of front top roller, 7b = small diameter portion of front top roller, 8
: Front bottom shaft, 9: Second front top roller, 10: Filament, 11: Tension device, 13:
Pressure device, 15: Traveler, 17: Composite yarn

Claims (1)

[Claims] (1) In a composite yarn consisting of a continuous yarn and a short fiber component, A. The continuous yarn is arranged in the center of the composite yarn and the short fiber component is arranged in the outer periphery, and B. Short fibers are arranged at least in the outer layer. The component is wound in a real twist around a continuous yarn, and the continuous yarn in the center has a real twist in the same direction as the winding direction, and the single fibers constituting the short fiber component are C. The composite yarn is arranged substantially parallel to the actual twisting direction, and has a coverage ratio of short fiber components constituting the outer layer portion of 80% or more.