JPS63182438A - Production of special yarn - 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]

[Industrial Application Field 1] The present invention relates to the production and processing of special yarn using bound spun yarn. [Prior Art] A bundled spun yarn 2 is produced by passing a staple fiber bundle from a pneumatic turning device to an untwisting tube, passing it from the untwisting tube to a pneumatic false twisting device, and pulling it out as a yarn. It is made of two types of winding fibers 23 that are wound around this from the outside. The yarn 51 propagates the strong false twist imparted to the staple fiber bundle S by the false twisting device 9 through the untwisting tube 7 to the region of the pneumatic yarn turning device 16 in a cane state that does not cause yarn breakage. , the staple fiber bundle S is twisted in a cane shape in the region, and the cane-shaped staple fiber bundle S is subjected to pneumatic yarn rotation to maintain a certain balance with the cane and avoid yarn breakage. Act on the jet swirling air of the device 6. to cause a fiber slip φ deviation between the fibers of the cane-shaped staple fiber bundle S, and when the staple fiber bundle S with the slip/deviation in the fiber diagram passes through the false twisting 1i1f9, the staple fiber The bundle S is untwisted with an intensity corresponding to the number of false twists imparted by the false twist imparting device 9, and the false twist imparting device 1
When the above-mentioned false twist inserted into the stable fiber bundle S by 29 returns to zero, the fibers with slips and misalignments are balanced with the fibers without slips and misalignments, and the bundle with real twist inserted A spun yarn 51 is obtained. In the above bound spinning system, the bound spun yarn formed by blending heat-shrinkable fibers and non-heat-shrinkable fibers exhibits a high shrinkage rate of 30 to 40% when heat treated,
The surface was jagged and uneven, making it an overall hard thread. Problem 1 to be Solved by the Invention The present invention aims to produce a special yarn that takes advantage of the above-mentioned characteristics of the bound spun yarn made of the heat-shrinkable A-fiber.

[Means to solve the problem]

A state in which one end of the single fiber constituting a staple fiber bundle formed by blending a non-shrinkable staple fiber and a synthetic miscellaneous staple fiber with a high heat shrinkage rate is essentially aligned in the longitudinal direction of the yarn. forming an inner layer part of the produced yarn, and exposing the other end of the fiber to the outer layer part of the produced yarn so that each single fiber is arranged in the same direction,
The yarn ends exposed to the outer layer are twisted together with bundled spun yarn, which is wound in a real twist on the surface of the produced yarn, and yarn made of non-shrinkable staple fibers, and then heat-treated to obtain a special yarn. . Embodiment The special yarn 1 produced by the method of the present invention has a heat-shrinkable bound spun yarn 2 as a core, and a non-shrinkable IIi fiber 3 is wound around the core. Heat-shrinkable bound spun yarn? is created as follows. 5. A staple fiber bundle S made by drafting a non-stretchable staple fiber and a synthetic staple fiber with a high heat shrinkage rate by a conventional means is attached to a balloon control ring5. Pneumatic yarn swirling device consisting of a first air injection nozzle [6, untwisting tube 7° balloon control ring 8.
The yarn is sequentially passed through a false twisting device @9 consisting of a second air injection nozzle, drawn out as spun yarn 2 by a pull-out roller (not shown), and wound up by a winding device (not shown). Pneumatic yarn turning device6. As shown in FIG. 3, the false twisting device f9 is configured such that the air injection tube 11 is oriented approximately tangentially to the yarn passing tube 12 and in the axial direction of the yarn passing tube 12 at an angle α1. Opens at an angle of α2, from the injection pipe 11 to the yarn passing pipe 1
The air ejected into the yarn passage tube 2 generates a swirling spiral flow of air flowing in the yarn traveling direction within the yarn passing tube 12, and the fiber bundle and the yarn are actively pulled out in the yarn traveling direction while rotating or swirling. The staple fiber bundle S sent from the draft device (not shown) enters the pneumatic yarn turning device @ 6 and enters the air injection pipe 1.
1 is swirled within the yarn passage tube 12. The size of the balloon produced by this swirling is determined by the inner diameter of the yarn passage tube 12 of the pneumatic swirling device. As the inner diameter becomes larger, the stretching force and finishing force of the balloon will be increased to increase the diffusion or completion of the fiber bundle. It is thought that the twisting braking effect is increased, making it easier for slip and misalignment between the fibers to occur. At this time, the balloon control ring 5 is useful for controlling this balloon. The balloon causes a slip/displacement of one stave shift between the staple fibers of the staple fiber bundle S. Then, when the staple fiber bundle in which slips and deviations have occurred between the fibers passes through the false twisting device 9, the staple fiber bundle S is untwisted with a strength commensurate with the number of false twists imparted by the false twisting device 9 to the staple fiber bundle S. When the false twist inserted into the staple fiber bundle S by the false twisting device 9 returns to zero, the staple fibers that have slipped or misaligned are balanced with the staple fibers that have not slipped or misaligned, It becomes a spun yarn with real twist inserted. In the above, when the directions of the air jetted from the air injection pipes 11 of the pneumatic swirling device 6 and the false twisting device 9 are reversed, the untwisting effect can be dramatically increased. In other words, the direction in which the twist propagated by the false twisting device rapidly descends at the untwisting tube and the twist imparted by the pneumatic yarn rotation tilt (actually, this is because it acts as a twisting brake for the false twisting nozzle) (It would be more appropriate to call it braking force) suddenly drops in the opposite direction at the untwisted tube, and the two effects combine to create a large twisting transition point, which promotes expansion and expansion between the fibers. It is considered to be. It should be noted that slips and deviations are more likely to occur in the direction of rotation of the pneumatic yarn rotation '#& in the opposite direction to the direction of rotation of the false twisting device than in the same direction. By the above-mentioned slip, the bundled spun yarn 2 made by the bending method is basically oriented in the yarn traveling direction and placed at the WJ 25 after the staple fiber 24, as shown in FIGS. 2A and B.
is in the inner layer of the produced yarn, and the v1 of the staple reflex 1 bar is
The yarn is wound in a real twist around the outer layer of the produced yarn from the end 26 and the front side of the staple fiber to the front end. High shrinkage bound spun yarn 2 obtained as above and 100% cotton
A plurality of non-shrinkable Van yarns 3 of an appropriate amount such as % are combined, twisted, and heat-treated to shrink the heat-shrinkable staple fibers of the heat-shrinkable bundled spun yarn. Due to the contraction of the heat-shrinkable staple fibers, the heat-shrinkable bundled spun yarn 2 shrinks at a high shrinkage rate, forming a highly jagged and uneven surface, and the staple fibers of the non-shrinkable fiber yarn are heated. is entangled with that surface, which helps prevent slippage between the winding thread and the core thread. The above-mentioned yarn twisting is a process in which a plurality of yarns of different materials or physical properties are twisted together. As a criterion for selecting the yarn for the above-mentioned twisting, ■ Since the outer IIi fibers of the created yarn determine the texture of the final product, such as a woven fabric or knit product, the material of the winding fiber is determined depending on the application. ■The finer the core yarn, the softer the texture.
There are three points: the ratio of the count to the iI111 yarn, and the number of twists. By combining these three conditions and factors, it is possible to create a wide variety of special yarns. For example, when one 100% cotton thread No. 40 and one high shrinkage acrylic binding yarn No. 40 are twisted together at 2507/m,
As shown in FIG. 1A, a part of the cotton threads twisted around the outer periphery of the contracted highly contractible binding thread 2 can be formed into a thread that protrudes in an angular shape. In addition, when two non-shrinkable fiber yarns 2 made of 100% cotton, 40 count, and one high shrinkage acrylic binding yarn 2, made of 40 count, are twisted together at a ply twist of 450 T/i and heated, the result is as shown in Figure 1B. As shown, the high shrinkage @ miscellaneous yarn 2 shrank and was surrounded by cotton yarn, resulting in a yarn that had the appearance of 100% cotton. K Effects of the Invention: Since the method of the present invention uses a heat-shrinkable spun bundle yarn as the so-called core of the special yarn produced, the roughness of the surface of the spun bundle yarn that occurs during heat shrinkage may cause the core to deteriorate. The non-shrinkable fibers that are wrapped around the yarn blend well with the core yarn and prevent it from slipping on the surface of the core yarn. Therefore, even when the non-shrinkable fibers are wrapped around the core yarn under the cane, the shape of the special yarn can be maintained without being impaired.

[Brief explanation of the drawing]

Figures 1A and B are front views of two embodiments of special yarn produced by the method of the present invention, Figure 2A is a front view of a heat-shrinkable binding yarn, Figure 3B is a schematic illustration, and Figure 3 is a binding spun yarn. FIG. 2 is a schematic front view of a manufacturing apparatus. 1...Special thread, 2...Heat-shrinkable bound spinning system. 3...Non-shrinkable fiber yarn

Claims (1)

[Claims] One end of the single fiber constituting the staple fiber bundle formed by blending a non-shrinkable staple fiber and a synthetic staple fiber with a high heat shrinkage rate is essentially aligned in the longitudinal direction of the yarn. forming an inner layer part of the produced yarn, and exposing the other end of the fiber to the outer layer part of the produced yarn so that each single fiber is arranged in the same direction;
The yarn end emerging from the outer layer is a special method in which the bundled spun yarn, which is wound in a real twist on the surface of the produced yarn, and the yarn, which is made of non-shrinkable staple fibers, are combined, mixed and twisted, and then heat-treated. How to make yarn.