JPH03113032A - Production of partial bulky yarn - Google Patents

Abstract

PURPOSE:To efficiently obtain the subject bulky yarn, excellent in shape fastness and having spun yarn-like hand by separately using a turning flow nozzle and jet nozzle so as to prevent fluctuation in tension of yarn from affecting the jet nozzle. CONSTITUTION:Multifilament yarn (sheath yarn) 2 is overfed to a twisting zone of another multifilament yarn (core yarn) 1 which is being false twisted with a turning flow of a turning flow nozzle 8 to form >=2 partial bulky parts/m in which the sheath yarn 2 is wound around the periphery of the core yarn 1 in the form of plural layers in the longitudinal direction of the yarn. Both yarns are subsequently fed through a guide to a jet nozzle to form interlacements and loopy fluffs and afford the objective bulky yarn.

Description

[Detailed description of the invention] (Industrial application field) The present invention consists of a multifilament yarn.

The present invention relates to a method for manufacturing a partially bulky system that has a span-like texture and excellent cohesiveness.

(Prior Art) Conventionally, as a method of imparting a spun-like texture to multifilament yarns, a method of forming a slab system using false twisting is well known.

The slub yarn formed by this method has poor cohesiveness, making it difficult to pass through post-processing, and has the disadvantage that practical problems such as deterioration in workability and quality are likely to occur.

On the other hand, Japanese Patent Application Laid-Open No. 60-2737 uses a single fluid processing device that can provide swirling flow and turbulent flow.

A method has been proposed in which a slub yarn is formed by falsely twisting the yarn using a swirling flow, and then the slub yarn is entangled using a turbulent flow. This method performs interlace interlacing, so although it has the effect of converging and blending yarns, it has the disadvantage that loop fuzz is not formed on the yarn surface, so it lacks a sense of fullness and warmth.

In order to eliminate the above drawbacks, the present inventors.

Japanese Patent Laid-Open No. 63 (1982) described a method for manufacturing slub yarn in which loop fluff is formed on the yarn using a fluid jet nozzle equipped with swirling flow and propulsive force.
This was proposed in Publication No.-256742. However, in this method, the false twisting action of the swirling flow and the disturbance action of the propelling flow are simultaneously applied inside the fluid injection nozzle, so subtle tension fluctuations in the slab and non-slab parts that occur during winding are caused by the fluid. affect the action.

For this reason, the disturbance effect caused by the propelling flow is disrupted, causing subtle differences in entanglement and loop fuzz formation in the longitudinal direction of the yarn.
There was a drawback that entanglement and loop fluff were likely to be formed unevenly.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, and has excellent form solidity of a partially bulky part (slab part) wound in a plurality of layers.
In addition, by forming uniform entanglement and loop fluff throughout the yarn, the slub shape is clear even when it is made into a fabric, giving the fabric a varied appearance and a soft, warm texture similar to that of a span. The technical objective is to provide a method for producing partially bulky yarns that can be manufactured using the following methods.

(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the inventors of the present invention have developed a swirl flow nozzle for false twisting yarns and a jet nozzle for imparting entanglement and loop fuzz to yarns. (jet fluid agitation nozzle) is used separately, and the winding of the swirling flow nozzle is done so that fluctuations in the tension of the yarn due to the action do not affect the jet nozzle, so that the entire yarn is uniformly wound. The present invention was achieved by discovering that entanglement and loop fluff can be formed.

In other words, 9 the present invention is characterized in that other multifilament yarns (sheath yarns) are placed in a twisted area of a multifilament yarn (core yarn) that is being falsely twisted by the swirling flow of the swirling flow nozzle. Then, the sheath yarn is wound around the core yarn in multiple layers to form at least 2 partial bulky parts/m in the longitudinal direction of the yarn, and then the 9 yarns are passed through a guide to a jet nozzle. supply.

The gist of the present invention is a method for producing a partially bulky yarn characterized by forming entanglement and loop fuzz.

Hereinafter, one aspect of the present invention will be explained in detail.

FIG. 1 is a schematic process diagram showing one embodiment of the present invention. In FIG. 1, the core yarn 1 is supplied from the supply roller 4 to the swirl flow nozzle 8 at a constant overfeed rate.
The water is supplied to the jet nozzle 9 via the guide 11 while being heated by the swirling flow of the water.

On the other hand, the sheath yarn 2 is supplied by the supply roller 5 at an excess supply rate that is greater than the supply amount of the core yarn 1, passes through the yarn feeding guide 10, and is combined with the core yarn 1 in the twisting region of the core yarn 1.

The sheath yarn 2 is wound around the core yarn 1 due to the heating action of the core yarn 1, but as it is wound, the tension of the sheath yarn 2 increases and the sheath yarn 2 is wound at the doubling point 1.
2 moves to the supply roller 4 side 12'.

Next, when the tension of the sheath yarn 2 increases to a certain limit, the yarn joining point 12' moves in the opposite direction, that is, to 12 on the swirl flow nozzle 8 side, in an attempt to return to a stable twisted state, so that the tension decreases. If the heating effect continues.

The tension of the sheath yarn 2 increases again and the doubling point moves to 12'. Due to this reciprocating movement of the yarn joining point, the sheath yarn 2 is attached to the core yarn 1.
The partial bulky portions are formed intermittently in the longitudinal direction of the yarn by winding the yarn into a plurality of layers.

The moving distance of the yarn doubling point is preferably set to usually 3 to 10 cm, although it depends on the swirling force of the swirl nozzle 8, the position of the yarn feeding guide 10, etc.

Next, the yarn with the partially bulky part formed by the swirl flow nozzle 8 is
Guide 1 provided between swirl flow nozzle 8 and jet nozzle 9
1 to the jet nozzle 9, and after being caused to form entanglement and loop fluff by the disturbance action of the jet nozzle 9, it is passed through the delivery roller 6 and wound up into the winding package 7.

At this time, the guide 11 serves to moderate and absorb subtle tension fluctuations in the yarn caused by the winding action of the swirl flow nozzle 8, and to keep the tension of the yarn guided to the jet nozzle 9 constant. Therefore, the guide 11.

A thread-guiding element and a resistor-like element to moderate and absorb tension fluctuations are required, and it is necessary to take these into consideration when selecting the material, shape, surface finish, etc. of the guide as appropriate. It is preferable to use an alumina guide, which has a higher frictional resistance than a steel guide. Also, this guide 11
If the thread path is bent by using this, the effect can be further enhanced.

Next, the yarn passing through this guide 11 is guided into the jet nozzle 9 while maintaining a constant tension, and the yarn is guided into the jet nozzle 9 while maintaining a constant tension.
Uniform entanglement and loop fluff are formed by the fluid disturbance effect. Here, the yarn guided into the jet nozzle 9 is subjected to a disturbance effect by the fluid jet flow, and the core yarn and sheath yarn are in an opened state.

Even if the bulky part where the sheath yarn is wound in multiple layers around the core yarn is subjected to such opening action, due to the complicated winding, the outer layer or a part of the layer will be opened, but the inner layer will not be opened. The section will remain rolled up.

Therefore, in both the partially bulky portion and the non-bulky portion, the spread portions become intertwined and can form loop fuzz.

As mentioned above, in order to perform fluid agitation treatment on a yarn having a partially bulky part in which sheath yarns are wound in multiple layers around a core yarn, to form entanglement and loop fluff in both the partially bulky part and the non-bulky part. , it is necessary to use a swirl flow nozzle that can gently wind the sheath yarn while the heating tension of the core yarn is low.

The size and frequency of the 1-part bulky portion can be changed as desired.1 For example, the turning force of the turning nozzle, the yarn overfeed rate, the distance between the guide 10 and the core yarn, etc. It can be changed and adjusted as appropriate.

Further, it is preferable that the oversupply rate of the core yarn is 2 to 10%, and the oversupply rate of the sheath yarn is 5% or more, particularly 10 to 40% higher than the core yarn.

The swirling flow nozzle used in the present invention is not particularly limited, and any type can be used as long as it can false-twist the yarn, preferably 200 T/M or more, particularly 5007/M or more. An air swirl nozzle that can impart swirl under low tension is desirable. Jet nozzles can also form entanglements and loop fuzz in the yarn. It is not particularly limited as long as it is a so-called taslan processing nozzle.

The partially bulky system obtained by the present invention, as shown in FIG.
The yarn has partial bulky parts A and non-bulky parts B alternately in the longitudinal direction, and the partial bulky part A has sheath yarns 2 wound around the core yarn 1 in a plurality of layers, and the outermost layer filament Loop 3 is formed.

On the other hand, in the non-bulky portion B, the constituent filaments of the core thread 1 and the constituent filaments of the sheath thread 2 are intertwined with each other, and a large number of loops 3 are formed. By interlacing with the loop fluff, a spun-like texture with excellent shape durability can be imparted.

In addition, in order to give the fabric a varied appearance, it is necessary to have 2 or more bulky parts/m, preferably 5 or more parts/m.

When the number of partial bulky parts is less than 2 pieces/m, one surface change becomes extremely small, resulting in disadvantages such as the fabric having a monotonous appearance and the occurrence of one periodicity.

In the present invention, the multifilament yarns serving as the core yarn and sheath yarn include homopolymers such as polyester and polyamide, and copolymers mainly composed of these polymers;
Synthetic fibers obtained from blended polymers, rayon,
Regenerated cellulose fibers such as cupra can be used.

(Example) The present invention will be explained in detail below by way of nine examples.

Example 1 Polyester multifilament yarn 75d/ as core yarn
Partially bulky yarns were manufactured using polyester multifilament yarn 75 (i/36f) as sheath yarns and sheath yarns according to the manufacturing process shown in FIG. 1 and under the processing conditions shown in Table 1.

Table 1 Under the same conditions as in Table 1, the heating number of the swirl flow nozzle was measured when only the core yarn was supplied.

It was 1100T/M.

Further, the yarn feeding guy H1 was made of alumina and had an inner diameter of 1 mm.

The obtained partially bulky yarn has loop fuzz throughout the yarn,
In addition, partial bulky parts and non-bulky parts were formed alternately, and the number of partial bulky parts was 9 pieces/m.

In addition, in the non-bulky part, the core yarn and sheath yarn are intertwined with each other.

In addition, in the partially bulky part, the sheath yarn was wound around the core yarn in layers, so the yarn had excellent shape robustness against tension and compression.

The obtained partially bulky yarn was used for the warp and weft, and 68 warps/weft were used.
By weaving a plain fabric with a density of 2.54 cm and a weft of 60 threads/2.54 cm and applying a normal dyeing finish, we obtained a spun-like fabric with an extremely variable appearance and excellent softness and warmth. It was done.

(Effects of the Invention) As described above, the present invention skillfully utilizes the swirling flow nozzle and the jet nozzle to perform winding, winding, and entangling.

Since the loop fluff formation is performed in a series, according to the present invention, it is possible to efficiently produce a partially bulky yarn that has good yarn shape robustness and can impart a spun-like texture to the fabric. Moreover, by preventing tension fluctuations caused by the winding action from spreading to the jet nozzle, it is possible to form uniform entanglement and loop fluff over the entire yarn.

[Brief explanation of drawings]

FIG. 1 is a schematic process diagram showing an embodiment of the method for producing a partially bulky yarn of the present invention, and FIG. 2 is a schematic side view showing an embodiment of the partially bulky yarn obtained by the present invention. . A: Partial bulky part B: Non-bulky part 1: Multifilament yarn (core yarn) 2:
Multifilament yarn (sheath yarn) 3: Loop fluff 4.5: Supply roller 6: Delivery roller 8: Swirling flow nozzle 9: Jet nozzle 11: Guide

Claims (1)

[Claims] (1) Other multifilament yarns (sheath yarns) are supplied in excess of the core yarns to the twisted region of the multifilament yarns (core yarns) that are being falsely twisted by the swirling flow of the swirling flow nozzle. , forming at least two partial bulky parts/m in the longitudinal direction of the yarn in which the sheath yarn is wound in a plurality of layers around the core yarn, and subsequently supplying both yarns to a jet nozzle via a guide; A method for producing partially bulky yarn characterized by forming entanglement and loop fuzz.