JPH0770858A - Bulked spun yarn and its production - Google Patents

Abstract

PURPOSE:To obtain a uniform spun yarn having roundness and excellent in swelling and bulkiness. CONSTITUTION:This bulked spun yarn is characterized in that the yarn is a spun yarn obtained by subjecting one fiber bundle gradually increasing draft ratio in the width direction of a fiber bundle to fine spinning and formed by successively winding a monofilament group having high draft ratio and constituting a fiber bundle around a monofilament group having low draft ratio and constituting a fiber bundle and the yarn has true twist. This method for producing bulked spun yarn is characterized by subjecting one fiber bundle changed so as to gradually increase a feed amount in the width direction of a fiber bundle to fine spinning by a ring fine spinning frame having a front top roller consisting of a pair of taper rollers and a front bottom roller and successively applying true twist thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun yarn in which the voids between the single fibers constituting the spun yarn are increased, the spun yarn is uniform and rounded, and the bulkiness is excellent, and a method for producing the spun yarn.

[0002]

2. Description of the Related Art Conventionally, a monofilament group (fleece) that has come out from a front roller of a ring spinning frame has a structure in which all monofilaments are fed out uniformly along the width direction. Although the fibers are few as compared with the single fibers near the center of the fleece, they become a yarn in a state of being converged while being extended toward the central axis of the yarn. For this reason, the spun yarn is tightened and loses its bulkiness, and the product has the drawback of being heavy and less repulsive and yet rigid.

[0003]

As a solution to these problems, JP-A-60-185831 proposes a spun single yarn having bulkiness and a method for producing the same. In this method, the front roller is divided into two stages of roller element sections, two roving yarns are used, and the feeding amount is changed to wind the fleece with a high draft around the fleece with a low draft.
As a method of changing the feed amount, a method has been proposed in which the bottom roller is divided into two elements so that the number of rotations is changed individually, or the bottom roller is changed to a roller having an outer diameter of two steps.

However, these methods have the drawback that since the delivery amount changing element has two stages, the yarn becomes a two-layer structured yarn, the yarn is not rounded, and the bulkiness of the yarn as a whole cannot be obtained so much. .

Further, there is a proposal to change the delivery amount in three steps aiming at further multilayering. However, even when a three-layer structure yarn is used, the roundness of the yarn is not sufficient and three yarns are provided in one spindle. In addition to the need to use the roving, it is disadvantageous for industrial production because changing the delivery amount in three steps is complicated in terms of equipment.

The present invention is intended to improve the above-mentioned drawbacks, and increases the voids between the constituent monofilaments, is uniform and rounded, and is excellent in bulkiness. To provide.

[0007]

In order to achieve the above object, the present invention has the following constitution.

That is, a spun yarn obtained by fine spinning one fiber bundle having a draft ratio gradually increasing in the width direction of the fiber bundle, and mainly comprising a single fiber group having a low draft ratio constituting the fiber bundle. And a single draft fiber group having a high draft ratio constituting the fiber bundle is sequentially wound, and has a real twist, which is a high spinning bulk yarn.

Further, a ring spinning machine having a front top roller and a front bottom roller consisting of a pair of taper rollers spins one fiber bundle whose delivery amount is gradually increased in the width direction of the fiber bundle.
Then, a method for producing a high spinning yarn having a bulk is characterized by imparting a real twist.

The present invention will be described in detail below.

In the bulk high spinning yarn of the present invention, one fiber bundle being supplied to the ring spinning machine and being drafted is changed so that the draft becomes higher along the width direction,
The feeding amount of each monofilament in the width direction is slightly changed to prevent the monofilaments from being aggregated, and individual monofilaments are formed into yarns in order from the one having the smallest feeding amount. .

In the spun single yarn proposed in Japanese Patent Laid-Open No. 60-185831, a plurality of sliver-shaped fiber bundles are formed by changing the delivery amount in two or three stages. Even if the delivery amount can be changed, it is 1
The delivery amount is the same in one fiber bundle. Therefore, the monofilaments of each layer fiber bundle are thread-formed in a grouped state, each layer is a separated two-layer or three-layer structure yarn, and each supply fiber bundle is a spun yarn.

On the other hand, in the high spinning yarn of the present invention, the delivery amount (draft ratio) is gradually changed in one fiber bundle, and the draft ratio is mainly centered on the single fiber group having a low draft ratio constituting the fiber bundle. This is completely different from the above-mentioned spun single yarn because it is formed by successively winding high monofilament groups and has an actual twist.

The fleece drafted in the conventional spinning process and gripped by the front roller has a constant width, a uniform thickness, and is twisted in a state where single fibers are lined up.

In the present invention, the feeding amount of the monofilament from one end of the fleece to the other end is sequentially changed and twisted at the same time.

More specifically, first, several single fibers at one end of the fleece with a small amount of delivery serve as cores to form the central portion of the spun yarn. Next, from the single fibers at one end, the single fibers arranged in the direction of the other end are made slightly larger than the delivery amount of the preceding single fibers, and are wound around the fiber bundle of the core forming the central portion. Further, the delivery amount of the monofilaments arranged adjacent to the other end direction is gradually delayed by a small amount and the filaments are sequentially wound to form a spun yarn.

Therefore, as described above, the spun yarn of the present invention is formed into a spun yarn by changing the feed amount of each single fiber, so that the spun yarn is a very natural and high spun yarn,
The spun yarn has uniform voids from the center of the yarn to the surface layer of the spun yarn, has an excellent bulkiness and is uniform and rounded. Further, the product using the high spinning yarn of the present invention has a light weight and good resilience.

Next, a method for producing the high spinning yarn having a bulk of the present invention will be described.

FIG. 1 is a process schematic diagram showing an example of a method for producing a high-density bulky yarn of the present invention.

FIG. 1 shows an outline of drafting and twisting of a spinning machine. A sliver and a roving 1 which are fed to the spinning machine are fed from a trumpet 2 to a back roller 3 and passed through an apron draft zone 4 to form a pair. It is gripped by the front top roller 5 and the front bottom roller 6.

FIG. 2 is a front view showing an example of the tapered bottom roller used in the present invention.

FIG. 3 is a front view and a side view showing an example of the tapered top roller used in the present invention.

As shown in FIG. 2, the bottom roller 6 is tapered one by one corresponding to the spindle.

In order to correspond to these front bottom taper rollers 6, a pair of top rollers whose surfaces are made of rubber cot in the same taper direction as shown in FIG. Try to call.

The diameter a, the taper action width b, and the average diameter f of the tapered portion of the tapered bottom roller 6 are not particularly limited, and may be the diameter and width according to the bottom rollers of various conventional spinning machines. The distance c between the centers of the left and right taper rollers is adjusted to the spindle gauge. The taper direction may be the same in the left and right directions, but it is preferable to set the taper directions in the opposite directions as shown in FIG. 2 so that the fibers wound around the top roller can be easily removed.
It is preferable to taper so that the small diameter g comes to the outside.

The taper angle α is 2 to 9 with respect to the center axis of the bottom.
A range of degrees is preferable, and if it is less than 2 degrees, the draft change amount with respect to the fleece width is too small. If it exceeds 9 degrees, the difference in the delivery amount at both ends of the fleece is too large, and although bulkiness is obtained, the ironing resistance is poor and the spun yarn tends to be easily crushed and easily deformed, and the product tends to become fuzzy. There is. The taper angle α is more preferably 4 to 6 degrees.

The presence or absence of grooves on the surface of the bottom roller is not particularly limited, and the gripping force is poor without the grooves. Further, since it is a taper, the large-diameter portion h may be deep and shallow in the small-diameter direction in consideration of the groove cutting process.

A rubber cot 7 is mounted on the surface of the top roller so that it is oriented in the same direction as the bottom roller taper portion. The action width may be the same as the bottom taper width or slightly smaller. As for the roller diameter, it is preferable that the diameter α of the central portion of the taper is matched with the roller diameter peculiar to the conventional spinning machine. Also, the roller shaft is preferably determined in accordance with the penjorham arm 8 of the spinning machine to be mounted.

It is important that the taper angle be the same as the bottom taper angle. If the angles are different, uniform pressure cannot be applied, and the rubber roller is damaged more quickly.

Further, since the center axis of the top roller obtains smooth rotation, it is important to set the center axis of the top roller on the same plane as the center axis of the bottom roller.

The bearing used for the top roller is not particularly limited, but a self-aligning type bearing is preferably used. The type and hardness of the rubber cot wound around the top roller are not particularly limited.

As described above, the bottom roller and the top roller, which are a pair of taper rollers, are mounted, and the sliver and the roving yarn are gripped by the usual method.

The draft changes along the width direction of the fleece, and the amount of the filaments gradually fed out from the single fibers held in the small-diameter portion is gradually increased, so that the bulk spun yarn of the present invention can be obtained.

The fleece center is preferably controlled by a collector or the like so as to be as close to the center of the bottom taper roller as possible.

Further, in order to obtain a product having a high bulkiness, it can be obtained by widening the fleece width. In this case, several rovings may be simultaneously supplied from the viewpoint of uniformly spreading the single fibers in the fleece.

[0036]

【Example】

[Example 1, Comparative Example 1] Polyester (“Tetron” manufactured by Toray Industries, Inc.) 3d × 51 mm 1 using a normal 2 inch (spindle gauge 70 mm, manufactured by Towa 200 spindle) ring spinning machine.
00% was made into a roving by a normal spinning method.

The roving condition was 1 / 1S (metric system). These roving yarns were set on the above spinning machine to make comparative yarns, total draft 30 times, count 1/30, twist coefficient K = 3.
A spun yarn was produced at 0 (Comparative Example 1).

Next, the front bottom roller and the top roller were replaced with those processed as follows. The draft drive system was the same as the comparative yarn.

First, assuming that the diameter of the neck portion of the bottom roller is 24φ, the taper large diameter portion 31.158φ, the taper central portion diameter 28.5φ,
Small diameter part 25.81φ, taper width 34mm, taper angle 4 ° 45 ', left end in the opposite direction to the penjoram arm,
It was processed so that the right end had a small diameter. Six weights were set between the stands, and they were connected with screws.

The pair of top rollers are the same as the taper direction of the bottom roller, the iron core roller diameter is 26φ, and the rubber cot width is
A taper angle with a rubber cot so that the center diameter of the top roller width is 30 mm and is 35φ, which is the same as the conventional top roller diameter.
Polished at 4 ° 45 ', rubber hardness 83 °, material was the same as conventional.

A self-aligning bearing (Model 108WA, manufactured by NSK Co., Ltd.) is placed inside the taper top roller, and a collar is inserted so that it can freely move only on the same plane on the center axis of the bottom roller. The diameter of the part is 11φ and the width is 22.5 mm, similar to the conventional top roller.

The bottom roller and the top roller processed as described above were attached, and the high-spun spun yarn of the present invention was spun under the same conditions as the spun yarn obtained by the conventional spinning machine.

The traverse of the roving was not performed, but the center of the draft fleece was set near the center of the taper bottom roller width, and the fleece width was controlled using a collector width of 6 mm.

The fleece coming out of the front taper roller rises at the end of the fleece located at the taper detail to form the core of the spun yarn, and subsequently, the individual filaments in the taper radial direction are successively wound around these surfaces and bulge. A uniform spun yarn was obtained.

When a spun yarn of the same material, a count and a twist number (comparative example 1) spun by a conventional spinning machine and the high spinning yarn of the above-mentioned present invention were laterally driven under the same conditions, the results are shown in Table 1. In contrast to the yarn, the basis weight decreased by 8% and the dry altitude increased by 22%. The bulk altitude is measured in accordance with JIS L1096 (general woven fabric test method).

Further, the high-roughness spun yarn of the present invention was a spun yarn with less fluff and a finer weave since the single fibers were successively wound around the surface as compared with the comparative yarn.

[0047]

[Table 1]

[0048]

As described above, the high-spun bulk yarn of the present invention is a spun yarn that is uniform, rounded, and has excellent bulging and bulkiness, and has the advantage that its manufacturing method is simple and versatile.

[Brief description of drawings]

FIG. 1 is a process schematic diagram showing an example of a method for producing a high-density bulky yarn of the present invention.

FIG. 2 is a front view showing an example of a tapered bottom roller used in the present invention.

FIG. 3 is a front view and a side view showing an example of a tapered top roller used in the present invention.

[Explanation of symbols]

 1: roving 2: trumpet 3: back roller 4: apron draft zone 5: front top roller 6: front bottom roller 7: rubber cot 8: penjoram arm

Claims (4)

[Claims] 1. A spun yarn obtained by finely spinning one fiber bundle having a draft ratio gradually increasing in the width direction of the fiber bundle, wherein a single fiber group having a low draft ratio constituting the fiber bundle is mainly formed. A high spinning yarn having a bulk, which is obtained by sequentially winding single fiber groups having a high draft ratio, which constitute the fiber bundle, and has a real twist. 2. A fiber spinning machine, which has a front top roller and a front bottom roller consisting of a pair of taper rollers, is spun into one fiber bundle whose delivery amount is gradually increased in the width direction of the fiber bundle. Next, a method for producing a high spinning yarn having a bulk, which is characterized by imparting a real twist. 3. The taper angle of the front bottom roller is
The method for producing a high-spun bulk yarn according to claim 2, wherein the range is 2 to 9 degrees with respect to the center axis of the front bottom roller. 4. The front top roller is on the same plane as the central axis of the front bottom roller, and the taper direction and taper angle of the front top roller are the same as those of the front bottom roller. A method for producing the bulk high spinning yarn described.