JPS5936738A - Composite spun yarn and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention relates to a composite spun yarn in which two or more continuous yarns are wound without contacting each other around the outer periphery of a fiber bundle of discontinuous fibers with substantially no twist, and the production thereof. Regarding the method.

Composite spun yarn, which is made by winding a continuous yarn material around the outer periphery of a twist-free discontinuous fiber bundle, has many characteristics. 6
There are drawbacks such as the loss of the original luster and bulkiness of the fibers due to twisting. Composite spun yarns solve many of the drawbacks of twisted yarns as described above, and are used in various applications as knitted fabrics.

However, if the continuous yarn wound around the outer periphery of the discontinuous fiber bundle is thin, it must be used as a double yarn when used for applications that require particularly strong strength, which may result in thicker yarns or increased manufacturing costs. There was a drawback that not only the height was increased, but the original bulkiness was lost. Proposals have been made to improve this drawback, but for example, in Japanese Patent Publication No. 53-35171, one continuous yarn is wound around a non-continuous delicate bundle with no twist, and after starting to form a composite spun yarn, This involves winding one more continuous thread or object in the opposite direction. Although this thread can certainly increase the strength, depending on the manufacturing conditions, it may not necessarily increase the strength. There are disadvantages such as the production equipment becomes complicated and the production cost increases.In other words, two bobbins are required for winding the continuous yarn, and along with this, two spindles, drive belts, etc. are required.
pcs are required. Not only does a device for reversing the direction of rotation become necessary, but the machine becomes larger, and the power also increases accordingly. Threading is also time-consuming because it requires two spindles. Furthermore, since there are complicated conditions such as the discontinuous fiber bundle being drafted when winding the first continuous yarn, and not being drafted when winding the second continuous yarn, winding the two continuous yarns It is extremely difficult to make the turning angles the same. In addition, unless the winding diameters of two continuous yarns on the bobbin are the same, the winding angle will not be constant, and furthermore,
It is also necessary to use continuous threads of unequal thickness.

More specifically, the composite spun yarn is tied up by the continuous yarn wound earlier and the continuous yarn wound later, so it cannot move freely and is restrained.
Is it necessary to have the same shrinkage rate for continuous threads of books? For example, if the shrinkage rates are different, the continuous yarn with the smaller shrinkage rate not only does not contribute to the sag 2 strength but also has drawbacks such as deteriorating the appearance of the composite spun yarn. Further, the above method is limited to two continuous threads. If the number of fibers is 6 or more, the manufacturing equipment and spinning conditions would become extremely complicated, making it impossible to manufacture.

The present invention solves many of the above-mentioned drawbacks, and can produce a continuous yarn material using simple equipment and conditions.

The purpose is to provide a high-quality composite spun yarn that is strong and has no restrictions such as the number of yarns having a thickness of two. That is, the present invention.

"(I) A composite spun yarn formed by winding a continuous yarn material around the outer periphery of a fiber bundle of discontinuous fibers with substantially no twist, in which a plurality of the wound continuous yarn materials exist, and A composite spun yarn characterized in that the continuous threads are independent of each other.

(2) In a spinning method in which a discontinuous fiber bundle is drafted, two 9-rotation hollow spindles are provided, and a continuous yarn wound around the outer periphery of the hollow spindle is wound around the discontinuous fiber bundle.

B. A composite spun yarn characterized in that a plurality of continuous yarns are arranged around the outer periphery of a hollow spindle, wound, and then wound into a discontinuous fiber bundle using a continuous yarn splitting device. Production method.

” It is.

The composite spun yarn of the present invention may use two or more continuous yarns, and the continuous yarns are wound in the same direction around discontinuous fibers.

It is desirable that the continuous threads are wound at equal intervals, but even if there is a slight difference in the intervals, the strength and appearance will not change. Also, the material and thickness of the continuous thread may be any.
For example, nylon multifilament (11D-3F)
, combinations of nylon monofilament (15D-IF), polyester monofilament (10D-IF), etc.

It is possible to use any thickness t without being restricted by the number. Further, even if the types and shrinkage rates of the plurality of continuous threads are different, since the continuous threads are not restrained from each other, no sagging or the like will occur.

The method for producing the composite spun yarn of the present invention is characterized in that a plurality of continuous yarn yarns are aligned and wound around one bobbin, and the composite spun yarn of the present invention is produced using a continuous yarn splitting device. Manufacturing became possible. Since a plurality of continuous yarns are wound in parallel, the lengths are the same, and since the positions where the yarns are unwound are the same, the balloons during winding also have the same shape. There is no problem even if the mutual tension changes slightly when multiple continuous threads are arranged on a bobbin and wound, and the size of ballooning changes slightly when winding into a discontinuous fiber bundle. It is possible to spin a good composite spun yarn. Each continuous thread is wound onto a separate bobbin,
If they are arranged in series, the winding diameters of the two bobbins must be made the same, and the thickness of the continuous yarn must be made the same, otherwise twisting will occur.9
．． Shitakani causes the thread to break, making the device complicated and requiring less force and tension.

It is impossible to use the composite spun yarn of the present invention.

The spinning device for the continuous yarn material may be, for example, a flyer. The flyer can handle a number of continuous threads. A fiber splitting device separates multiple continuous yarns and winds them into discontinuous fiber bundles at equal intervals. By using this in combination with a method of aligning and winding multiple continuous yarns, This makes it possible to manufacture the composite spun yarn of the present invention. Compared to conventional ring spinning machines, there is almost no change in the size or structure of the machine, and it can be used as is.

Suppose that it is produced using two continuous yarns according to the manufacturing method of the present invention at a winding pitch similar to the winding pitch of a conventional composite spun yarn using one continuous yarn.

The rotational speed of the hollow spindle can be reduced by half, which not only saves power but also reduces machine wear and noise.In addition, the composite spun yarn produced is a continuous yarn. There are many advantages, such as an increase in strength as the winding angle increases.

1 is an enlarged view of the appearance of a composite spun yarn of the present invention using three different continuous yarns. Discontinuous fiber bundle 1, 1 without twist
I) The same continuous threads 2 and 2' are wound on the outer periphery of the same continuous threads 12, 2', each having a different thickness, without contacting each other, I) in the same direction without sagging. It is something that

Since the discontinuous fiber bundles 1 and 11 have no twist, they are effective even when using fibers that cannot be made into yarn by conventional spinning or fibers that require bulkiness. Continuous yarn material 2
．． 2', 12. 13. 14 can be made of any material, thickness, physical properties, etc., and the number thereof is not limited. The winding angle of the continuous yarn being wound can also be freely selected and manufactured depending on the spinning speed and the winding speed of the continuous yarn. If the spinning speed and winding speed are the same, the winding angle becomes smaller as the number of continuous yarns increases. If a composite spun yarn is used in a field that requires particularly strong strength, it is sufficient to increase the number of continuous yarns and increase the winding angle of the yarns.

FIG. 3 is a sectional view of the method for producing composite spun yarn of the present invention when two continuous yarns are used. The discontinuous fiber bundle 21 is drafted by a draft part 22, and the drafted thin discontinuous fiber bundle is guided into a center heath 24 mounted on the upper end of a rotating hollow spindle 26. Two continuous yarns 2 wound in parallel around the outer periphery of the hollow spindle 23
5.25' is divided into fibers by a flyer 26 having two arms and fed into a hollow spindle 26 for one revolution. Two continuous yarns are wound at equal intervals around the outer periphery of the discontinuous fiber bundle in a rotating hollow spindle to form a composite spun yarn 27, which is passed through a delivery roller 28 and wound up by a winder 29. The flyer 26 can freely rotate around the hollow spindle and rotates slightly faster than the hollow spindle. As the spinning speed increases, the difference in rotation between the flyer and the hollow spindle increases.

In order to wind two continuous yarns of composite spun yarn with the same interval.

(1) Weaken the winding tension of the continuous yarn.

(2) Increase the tension of the discontinuous fiber bundle.

(3) The part where the continuous yarn is wound around the discontinuous fiber bundle is narrowed to reduce ballooning of the fiber bundle.

etc. are necessary. In order to reduce the tension of the continuous yarn, it is desirable to make the flyer as light as possible, and to rotate it lightly around the hollow spindle. As a result of research by the present inventors, a flyer with two arms has 0
．． We succeeded in reducing the weight to about 2g. However, this is not essential. To increase the tension of the discontinuous fiber bundle, make the tip of the centerpiece thinner and bring it as close to the front roller of the straight raft part as possible.

The distance from the nip point of the front roller to the winding part of the continuous yarn material is made equal to or less than the fiber length, and the speed ratio between the front roller and delivery row 2 is adjusted (underfeed).
This can be achieved by doing. Furthermore, it is important to reduce the diameter of the wound part of the continuous yarn to reduce ballooning of discontinuous fibers. Specifically, as a simple method, the purpose can be sufficiently achieved by attaching a center piece with a sharpened tip and a small inner diameter to the tip of the hollow spindle.

Separating devices for multiple continuous threads are not limited to flyers, but also vary depending on the spindle rotation speed.

The traveler-like object may be rotated by an induction magnet whose spinning speed and the winding diameter of the continuous yarn are controlled by a simulator.

If the production conditions are as described above, it is possible to spin out 11 types of composite spun yarns.

Furthermore, (1) the larger the ratio of the thickness of the discontinuous fiber bundle to the continuous yarn material.

(2) The stiffer the discontinuous fiber bundle.

(3) The smaller the Young's modulus of the continuous yarn, the easier it is to produce the composite spun yarn of the present invention.

This will be explained below using examples.

In the manufacturing method shown in Figure 6, two 15-denier polyester monofilament threads wound in parallel on the outside of a hollow spindle equipped with a center piece with a thin and pointed tip and two inner diameters are used to create a spindle with two arms. This book has a weight of 0.
It was separated into fibers using a 2g fryer, passed through a hollow spindle, passed through a delivery roller, and was placed in a wine goo. Next, the delivery roller and wine goo were driven at 14 m/min, and after confirming that the fryer was rotating, the hollow spindle was rotated at 3 DO Drpm. Next, polyester 3 denier 89 mm 55% by weight and wool 644
A discontinuous fiber bundle blended with 45% by weight is spun with a spinning count of 24.
Draft the number (meter number).

Introduced into a rotating hollow spindle. Two polyester monofilament yarns were wound around the outer periphery of the discontinuous fiber bundle within a centerpiece attached to the tip of a rotating hollow spindle.

The yarn produced in this manner was a high-volume, good composite spun yarn in which filament yarns were wound at equal pitches.

Example 2 In the same manufacturing method as in Example 1, a weight 0 fabric was manufactured with arms having six equal angles of three 15 denier polyester monofilament threads wound in parallel around the outside of a hollow spindle.
．． It was separated into fibers using a 6g fryer, passed through a hollow spindle, passed through a delivery roller, and was placed in a wine goo. Next is the delivery roller.

After driving the wine goo at 10 m/min and making sure the fryer rotates, move the hollow spindle to 5DODr.
Rotated at pm. Next, a discontinuous fiber bundle made of a blend of 65% by weight of 1.5 denier 58 nun polyester fiber and 65% by weight of cotton was drafted to a spinning count of No. 20 (fine count) and introduced into a rotating hollow spindle. Six polyester monofilament yarns were wound around the outer periphery of the discontinuous fiber bundle within a centerpiece that was disposed at the tip of a rotating hollow spindle.

The yarn produced in this way was a composite spun yarn with good luster without the filament yarns coming into contact with each other.

It is an enlarged view of the external appearance of two continuous threads of the same thickness wound at the same pitch. FIG. 6 is a process diagram showing the manufacturing method of the present invention.

Lll; Discontinuous fiber bundle 2, '2', 12. 13. 14. Continuous thread 21; Discontinuous fiber bundle 22; Draft part 23; Hollow spindle 24: Center piece 25.2
5'; Continuous yarn material 26: Flyer 27; Composite spun yarn 28; Delivery roller 29: Wine goo

Claims (2)

[Claims] (1) In a composite spun yarn formed by winding a continuous yarn material around the outer periphery of a fiber bundle of discontinuous fibers with substantially no twist, a plurality of the wound continuous yarn materials exist, and the winding A composite spun yarn characterized in that the continuous yarns are independent of each other. (2) In a spinning method in which a discontinuous fiber bundle is drafted and guided to a hollow spindle for 9 rotations, and a continuous yarn material wound around the outer periphery of the hollow spindle is wound around the discontinuous fiber bundle, a. A method for producing a composite spun yarn, which comprises aligning the strips around the outer periphery of a hollow spindle and winding them into a discontinuous fiber bundle using a continuous yarn splitting device.