JP3202008B2 - Composite twisted yarn and its production method - Google Patents

Abstract

A composite twist yarn is produced by twisting a spun yarn and at least one filament together. The composite twist yarn has features that the twisted direction of the composite twist yarn is substantially identical to the twisted direction of the spun yarn entwined in the composite twist yarn, and that the number of twists of the composite twist yarn is larger than that of the spun yarn entwined in the composite twist yarn. The composite twist yarn is produced by making a twisted spun yarn and at least one filament parallel to each other to a paralleled yarn, twisting the paralleled yarn in a direction reverse to the twisted direction of the spun yarn, and continuing the twisting over an untwisted point of the spun yarn. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a novel composite twisted yarn and a method for producing the same.

[0002]

2. Description of the Related Art A typical example of a composite yarn obtained by combining a spun yarn and a long fiber is a core yarn formed by covering a core yarn made of a long fiber with a spun yarn to give a twist, and a core yarn consisting of a long fiber. Single or double covered yarn in which a spun yarn is wound in a single layer or a multi-layer around a plied yarn, or pliers in which two or three spun yarns and one or more (usually one) long fibers are twisted are known. ing.

[0003] Of these, the core yarn is a yarn in which spun yarn is exposed on the entire surface of the yarn, has a good feel and a warm appearance and feel, and belongs to a high-quality yarn. However, in order to manufacture core yarn using cotton spun yarn, it is necessary to increase the entanglement of short fibers and secure yarn strength, so use only long fibers that have been screened out of short fibers as spun yarn materials. Is desirable, and in addition to the drawback that the yield of raw cotton and the like becomes extremely low, high technology and equipment are required to enclose the spun yarn around the long fiber as a core, and the composite yarn becomes expensive. There is a disadvantage that. Moreover, it is extremely difficult to produce fine core yarns due to production restrictions.

[0004] The above-mentioned covered yarn is formed by winding a spun yarn around a long fiber and is excellent in yarn strength and good in appearance and feel. Since it has to be wound in layers, the productivity as a composite yarn is low.

Further, the above-mentioned pliers are usually manufactured by aligning and twisting two or three spun yarns and long fibers, and it is not necessary to sort raw cotton as indicated by the core yarn. Although the productivity as a composite yarn is high, since the spun yarn and the long fiber are strongly twisted, the texture and feel of the composite yarn are hard and it is difficult to obtain a warm appearance and feel.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to obtain a high yield and productivity as a composite yarn without the necessity of sorting raw cotton or the like. Attention to pliers that can be used to improve the texture pointed out as a drawback, to provide a composite twisted yarn with excellent appearance and touch with warmth, and to easily manufacture even fine count yarns It is another object of the present invention to establish a new production method capable of producing a woven or knitted fabric having excellent appearance and touch using the composite twisted yarn.

[0007]

The composite twisted yarn according to the present invention, which can solve the above-mentioned problems, is a composite twisted yarn obtained by twisting one spun yarn and one or more long fibers. The twist direction of the composite twisted yarn and the twist direction of the spun yarn are the same, and the former is characterized in that the number of twists is larger than the latter, and in particular, stretchable long fibers are used as the long fibers. The resulting yarn is extremely useful as a composite twisted yarn having excellent elasticity and appearance and feel.

The manufacturing method according to the present invention provides a method for manufacturing a composite twisted yarn having the above-mentioned excellent characteristics, and is constituted by one twisted spun yarn and one or more long fibers. The twisted yarn is twisted in the untwisting direction with respect to the twisting direction of the spun yarn, and twisted in the opposite direction beyond the non-twist point of the spun yarn. I have.

The above-described composite twisted yarn of the present invention has sufficient yarn strength and excellent texture, appearance and touch.
Since a woven or knitted fabric using the composite twisted yarn as at least a part itself has an excellent texture, appearance, and feel, the woven or knitted fabric is also included in the scope of the present invention.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Under the above-mentioned problems, the present inventors have been able to obtain a high yield without the need to sort raw cotton, which is a feature of the pliers described above, and to achieve a high yield. Taking advantage of the advantage of `` easy '' and overcoming the drawbacks such as `` hard texture and poor appearance and tactile sensation '' as a drawback, we are developing a composite twisted yarn that gives a low-cost and high-class woven or knitted fabric. Research from various angles.

As described above, the conventional pliers are usually formed by twisting two or three spun yarns and long fibers in a direction normally reversely twisted with respect to the twisting direction of the spun yarn.
The appearance of the twisted yarn is tightened by twisting the spun yarn.
Paying attention to the essential drawback that the touch feel becomes hard, if the technique of twisting with the long fiber is established while reducing the tightening as the twisted yarn, the drawbacks of the pliers cannot be overcome. I proceeded along that line.

[0012] In the method of twisting two or more spun yarns, the twist direction of the twisted yarn is usually opposite to the twist direction of the spun yarn. Although the drawback cannot be improved, if one spun yarn is combined with a long fiber and twisted in the twisting step in the opposite direction to the twisting direction of the spun yarn, the spun yarn is untwisted in the twisting step. It was thought that the tightening of the spun yarn would be eased.

However, when a single spun yarn is twisted with a long fiber, if the twist given in the opposite direction to the twist given to the spun yarn is given, the spun yarn is naturally untwisted and becomes a composite twisted yarn. Power cannot be maintained. Therefore, even if twisting is performed in the untwisting direction, there is naturally a limit, and it has not been possible to obtain a composite twisted yarn having performance exceeding the characteristics of the conventional pliers. In particular, in the twisting process as a composite twisted yarn, if the twist of the spun yarn used is zero, that is, if the twist is given in the opposite direction until it becomes a non-twisted state, the spun yarn no longer becomes a raw cotton state and loses its strength, It is not practical to apply such a twist.

Therefore, further research was conducted to obtain a fiber having excellent appearance and tactile sensation by making the entanglement with the composite long fiber while ensuring the strength of the spun yarn, and as a result, the twist was given as described above. Aligned spun yarn and one or more long fibers,
If the drawn yarn is twisted in the untwisting direction with respect to the twisting direction of the spun yarn, and the twisted yarn is further twisted in the opposite direction beyond the non-twist point of the spun yarn, the strength as a spun yarn is maintained. In addition to the fact that the twist of the long fiber and the spun yarn is given densely and that a composite twisted yarn excellent in texture, appearance and feel is obtained, the present invention has been conceived.

As will be apparent from the following description, the composite twisted yarn obtained by adopting this method has the same twist direction as the composite twisted yarn and the spun yarn. In that the number of twists is larger than the number of twists of the latter spun yarn, and thus has a twist structure different from that of the conventionally known pliers.

Hereinafter, the twisting method characterized by the present invention and the characteristics of the composite twisted yarn obtained thereby will be described in detail with reference to the drawings showing an embodiment.

In the present invention, as shown in FIG. 1, one spun yarn B twisted (in the Z direction in the figure) and one (a plurality of filaments) long fiber M are aligned and aligned. The twist direction (Z direction) of the spun yarn B as shown in FIG.
Is applied in the untwisting direction (that is, in the S direction).
Then, the spun yarn B is untwisted and gradually untwisted, and the drawn yarn A is twisted in the opposite direction (S direction) corresponding to the number of untwisted spun yarns B, and the spun yarn B
The long fiber M winds around.

Then, further twist is added in the S direction,
When the same number of reverse twists as the twist initially applied to the spun yarn B is applied, the spun yarn B is completely untwisted and becomes untwisted as shown in FIG. 3, and the spun yarn B is no longer twisted. The spun yarn B itself loses its strength due to a floc not being hung. However, at that time, the long fiber M is wound around the spun yarn B in the untwisted state by the number of twists of the initial spun yarn B, and as a result, the spun yarn M is tightened from the outer peripheral side by the wound long fiber M. The spun yarn B in the state does not separate and scatter.

However, in this state, the yarn strength of the spun yarn B becomes almost zero, so that the strength as the composite twisted yarn depends only on the strength of the long fiber, and a sufficient strength cannot be secured. Therefore, in the present invention, the drawn yarn is further twisted. Then, as shown in FIG. 4, the spun yarn B is twisted in the opposite direction (S direction) to the original twist direction (Z direction), and as the number of twists in the S direction increases, the spun yarn B
As the strength of itself recovers, the spun yarn B is further wrapped with the long fiber M, and the twist pitch in the S direction as the composite twisted yarn becomes denser, and the strength increases. Therefore, if the spun yarn B itself is twisted in the S direction enough to give sufficient strength to the aligned yarn, a composite twisted yarn having sufficient strength can be obtained.

The relationship between the twist direction and the number of twists of the spun yarn B and the aligned yarn during this time is as shown in FIG. That is, FIG.
, The solid line X indicates the change in the twist direction and the number of twists of the aligned yarn, the solid line Y indicates the change in the twist direction and the number of twists of the spun yarn B in the aligned yarn, and the aligned spun yarn B
Has initially been twisted in the Z direction (eg, 20 turns / inch). When twisting in the opposite direction to the twisting direction of the spun yarn B (that is, in the S direction) is added to the aligned yarn including the spun yarn B, as shown by the solid line Y, the S aligned twist is applied to the aligned yarn. At the same time, the spun yarn B is further returned. Then, in the state in which the spun yarn B is returned twist to the untwisted state (Y ₁ point), pull the aligned yarn, the initial spun yarn had been added to the B and twisting the same number of S direction is applied (X ₁ point).

Thereafter, the drawn yarn is further twisted in the S direction.
The spun yarn B has the twist given at the beginning.
When the twist in the S direction opposite to the direction is added and the twist is further advanced,
As the number of twists in the S direction of the aligned yarn increases, the spun yarn B
The number of twists in the S direction also increases. And twist of spun yarn B
State is Y_TwoPoint (for example, 20 twists / inch in the number of twists in the S direction)
When the twist is added to the aligned yarn until
The twist state of the alignment yarn is X _TwoPoint reached, spun yarn
B direction initially given to B (20 turns / inch)
In addition, reverse twist added in the S direction from the untwisted state
(20 turns / inch) plus the number of twists (ie 40 turns / inch)
) Will be added.

Therefore, in the composite twisted yarn of the present invention which has reached the point X ₂ , the twist in the same direction (S direction) as the twisting direction given to the spun yarn B is added, and the S twist given as the whole composite twisted yarn is obtained. The direction twist is added, and the twist direction of the composite twist yarn and the twist direction of the spun yarn B inside it are the same direction, and the twist number of the former is larger than the twist number of the latter, which is characteristic. It becomes a twisted structure.

The twisting direction of the finally obtained composite twisted yarn varies depending on the twisting direction given to the initially spun yarn B. In any case, the final twisting direction of the composite twisted yarn of the present invention and the twisting direction therein The twist direction of the spun yarn B included is the same direction.

On the other hand, the number of twists of the composite twisted yarn and the spun yarn is arbitrarily determined according to the number of twists initially given to the spun yarn B and the number of twists of the composite twisted yarn which is reversed beyond the non-twisted state of the spun yarn B. Can be changed. However, in general, the number of twists given to the initial spun yarn B is, for example, usually in the range of 15 to 22 turns / inch for a 20th spun yarn, most commonly 18 times.
The number of twists is preferably about 15 to 2 in order to impart strength to the spun yarn B itself when the spun yarn B is twisted and then further twisted.
Since the number of twists is about 2 turns / inch (most commonly about 18 turns / inch), the number of twists of the final composite yarn as a whole is about 30 to 44 turns / inch (most generally 36 turns / inch). (Around inch), the number of twists of the spun yarn B twisted therein is about half that of about 15 to 22 turns / inch (most commonly about 18 turns / inch). However, in the present invention, since the strength is considerably increased by increasing the number of twists of the long fiber, even if the number of twists as the whole composite twisted yarn and the number of twists as the spun yarn are reduced to about 80% to 90% of ordinary strength, sufficient strength is obtained. Can be secured.

In the composite twisted yarn of the present invention, as described above, the number of twists as a whole of the composite twisted yarn tends to be considerably larger than the number of twists of a normal spun yarn. In general, even if a long fiber with a small diameter is twisted quite densely with a spun yarn with a large diameter, it is possible that the spun yarn is excessively wound and squeezed. However, in the state of the composite twisted yarn, the spun yarn is maintained in a state of being sufficiently exposed to the surface and sufficiently twisted with the long fiber. Therefore, the texture, appearance, and feel of the composite twisted yarn are similar to those of the core yarn described above, and the strength is sufficiently comparable to that of a normal plied yarn. In addition, the present invention is based on the premise that one spun yarn is used, so that it is easy to obtain a composite twisted yarn with a finer count than a normal plied yarn in which two or three spun yarns are combined. It becomes possible.

As described above, the composite twisted yarn of the present invention has a unique twist structure given by its unique twisting method, that is, "the twist direction of the entire composite twisted yarn is the same as the twist direction of the spun yarn therein" and It has a feature that it has a twist structure in which the number of twists of the composite yarn itself is greater than the number of twists of the spun yarn in it. Without limitation, it is possible to use any type of spun yarn or filament.

That is, as the spun yarn, any of the most typical spun yarns such as cotton, hemp, wool, and other plant and animal fibers, regenerated fibers, and synthetic fibers can be used. A mixed fiber obtained by mixing and arbitrarily combining them may be used. As long fibers, synthetic or semi-synthetic long fibers such as polyurethane, polyamide, polyester, acrylic and rayon are generally used, but natural long fibers such as silk can also be used. However, core yarns and pliers are often used as elastic yarns, and in order to make the most of their characteristics as such elastic yarns, long fibers such as polyurethane, which itself has elasticity, are used as long fibers. It is desirable to use.

In the present invention, it is necessary to use only one spun yarn in order to effectively utilize the above-mentioned features of the twisting process. If two or more spun yarns are used, the untwisting can be effectively performed. The characteristics of the present invention to be utilized cannot be utilized. However, the size of the spun yarn is not limited at all, and a spun yarn of any size can be selected and used according to the use and purpose, and the number of twists is desirably appropriately selected depending on the number of the spun yarn. On the other hand, the number of long fibers is not particularly limited, and one or two or more fibers can be arbitrarily aligned and twisted. Usually, one or two long fibers are used and the size (single fiber) is used. The yarn denier can also be arbitrarily changed according to the use and purpose.

The number of twists of the composite twisted yarn of the present invention in which one spun yarn and one or more long fibers are composited can be arbitrarily adjusted according to the required characteristics of the obtained composite twisted yarn. As mentioned above, it is easy to obtain even the fastest one.

The composite twisted yarn of the present invention thus obtained can be easily and inexpensively manufactured without the necessity of sorting raw cotton, as in the case of the pliers known as composite twisted yarn as described above. It has a texture, appearance, and feel similar to a natural core yarn, and is extremely excellent as a composite twisted yarn that gives a woven or knitted fabric with a high-quality feel.

The composite twisted yarn of the present invention has the above-described characteristics, and the characteristics are effectively exhibited by using the yarn as a raw material yarn of various woven or knitted fabrics. There are no restrictions on the weaving method or knitting method using the composite twisted yarn, regardless of whether it is a plain weave or a twill weave, even if it is made into a woven fabric, only one of the warp and the weft, or both the warp and the weft. The composite twisted yarn of the present invention can be used. In particular, when used as a material yarn for jeans fabric, the obtained jeans fabric is given an appropriate elasticity, and a highly flexible jeans fabric can be obtained, which is preferable.

By the way, the present inventors have made one cotton spun yarn (cotton count: No. 20, Z twist; 18 turns / inch) and one stretchable long fiber (trade name “ESPA” manufactured by Toyobo Co., Ltd.): 70 denier, 3.5 times draft) are compounded at a mixing ratio of 93% of the former and 7% of the latter, and they are aligned to give a direction opposite to the twisting direction of the cotton spun yarn. By twisting the aligned yarn in the S direction until the S direction twist becomes 18 turns / inch beyond the non-twist point, the twist as a composite twist yarn is 36 turns / inch in the S direction, and the cotton spun yarn therein A composite twisted yarn having a twist of 18 turns / inch in the S direction was produced. The obtained composite twisted yarn has the elasticity and moderate strength of bulky with the cotton spun yarn exposed on the surface and the periphery thereof is tightened with elastic long fibers, and the texture and appearance and feel are It was good, similar to regular core yarn.

When this composite twisted yarn was used as the weft and a 7th cotton spun yarn was combined as the warp to fabricate a jeans fabric, a jeans fabric having an excellent appearance and touch with elasticity in the lateral direction was obtained. was gotten.

[0034]

The present invention is constituted as described above, and can easily obtain a composite twisted yarn which gives a woven or knitted fabric having a texture comparable to that of a conventional core yarn and an appearance and a touch. Moreover, like the conventional core yarn combining cotton spun yarn,
Sorting of cotton spun yarn material (removal of short fibers) is unnecessary,
In addition to providing high-quality composite twisted yarn at low cost, even fine yarns can be easily obtained, and the range of application to woven and knitted fabrics can be further expanded.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a composite twisted yarn according to the present invention and a method for producing the same.

FIG. 2 is an explanatory view illustrating a composite twisted yarn according to the present invention and a method for producing the same.

FIG. 3 is an explanatory view illustrating a composite twisted yarn according to the present invention and a method for producing the same.

FIG. 4 is an explanatory view illustrating a composite twisted yarn according to the present invention and a method for producing the same.

FIG. 5 is an explanatory view showing a change in the twist direction and the number of twists of a spun yarn and a drawn yarn used as raw materials when carrying out the present invention.

[Explanation of symbols]

 B Spun yarn M Long fiber

Claims (4)

(57) [Claims] 1. A composite twisted yarn obtained by twisting one spun yarn and one or more long fibers, wherein the twisting direction of the composite twisted yarn and the twisting direction of the spun yarn are the same, and the twist number of the former is Wherein the number of twists is greater than the latter. 2. The filament according to claim 1, wherein the filament is a stretchable filament.
2. The composite twisted yarn according to item 1. 3. A method for producing a composite twisted yarn by twisting a spun yarn and a long fiber, wherein one twisted spun yarn and one or more long fibers are aligned and the aligned yarn is formed. And twisting in the untwisting direction with respect to the twisting direction of the spun yarn, and twisting in the opposite direction beyond the non-twist point of the spun yarn. 4. The method according to claim 3, wherein stretchable long fibers are used as the long fibers.