JPH07150433A - Conjugate fancy yarn and its production - Google Patents

Abstract

PURPOSE:To obtain conjugate fancy yarn having nep loop, prevented from slippage of nep loop and free from deformation of net loop. CONSTITUTION:This conjugate fancy yarn comprises alternatively repeating a slub part having a triple winding structure and formed from a pressing yarn having fineness of <=120% based on total fineness and a middle part having single winding structure in the outer circumference of a conjugate yarn having nep loop formed by winding of a sheath yarn 2 to a core yarn 1. The conjugate fancy yarn is produced by feeding the sheath yarn 2 to twisting area of the core yarn 1 in false twisting in an over feed state, winding the sheath yarn around the core yarn, further, feeding a pressed yarn 3 having a fineness f <=20% based on total fineness thereto in an over feed state having over feed ratio larger than that of the sheath yarn from a feed guide distance larger than that of the sheath yarn and then winding the pressing yarn 3 around the sheath yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite design yarn comprising a core yarn, a sheath yarn and a pressing yarn and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a composite false twisted yarn, a sheath yarn supplied in an overfeed state to a twisting region of a core yarn has a slab portion having a triple winding structure and a middle portion having a sheath yarn having a single winding structure. The yarns used are those disclosed in JP-B-45-28018 and JP-B-47.
It is known from Japanese Patent Publication No. 49459/1992 and the like, and these composite false twisted yarns are widely used as a material for pongee-like woven fabrics. Recently, composite false twisted yarns having various appearances and functions have been proposed or put into practical use by mixing different slab lengths, dyeability, fiber physical properties, and combination of different fibers such as fiber materials.

[0003]

However, in the conventional composite false-twisted yarn, the slab is mainly formed, and it is possible to form the nep loop by the composite false-twist, but in this case, the subsequent step In order to prevent slipping of the nep loop in the weaving and knitting process, the nep loop is heat-sealed using a low melting point fiber, or after the composite false twist,
It was necessary to fix the nep loop by twisting or covering with another yarn in the twisting process. An object of the present invention is to provide a composite design yarn comprising a composite false twisted yarn, which has a nep loop that prevents slippage of the nep loop and does not collapse.

[0004]

According to the present invention, a composite yarn having a nep loop formed by winding a sheath yarn around a core yarn is formed on the outer periphery of a pressing yarn having a fineness of 20% or less of the total fineness. The composite design yarn in which the slab portion having the triple wound structure and the middle portion having the single winding structure are alternately repeated, and the sheath yarn in the overfeeding state in the twisting region of the core yarn in the false twisting process. The sheath yarn is supplied to wind the sheath yarn around the core yarn, and a pressing yarn having a fineness of 20% or less of the total fineness is further fed from a feed guide distance larger than the feed guide distance of the sheath yarn and overfeed of the sheath yarn. The method for producing a composite design yarn is characterized in that the yarn is supplied in an overfeed state at a rate higher than that of the sheath yarn and is wound around the outer periphery of the sheath yarn.

In the composite design yarn of the present invention, the nep loop is formed by winding the sheath yarn around the core yarn, and the slab portion and the single winding structure of the triple winding structure formed by the outermost pressing yarn are formed. By repeating the middle part of the
The loop is fixed. Moreover, since the fineness of the pressing yarn is 20% or less of the total fineness of the composite design yarn, the pressing yarn is inconspicuous and constitutes an essential constituent requirement of the composite design yarn of the present invention.

The nep loop referred to in the present invention is a knot portion having a length of 20 mm or less, which is formed by a sheath yarn, and the distance between adjacent nep loops is 50 mm or less.

Each of the yarns constituting the composite design yarn of the present invention is not particularly limited, and examples thereof include yarns composed of long fibers such as polyester fibers, polyamide fibers, acrylic fibers, acetate fibers, and the like. A fineness yarn, a different shrinkage yarn, a partially oriented yarn, a high stress high shrinkage yarn, a different dyeing yarn, an ultrafine yarn, or a composite yarn of these is used.

A particularly preferred constitution of the composite design yarn of the present invention is such that the core yarn is polyester fiber, the sheath yarn is acetate fiber,
The pressing yarn is a polyester fiber or a polyamide fiber. According to such a constitution, a composite design yarn having a soft and silky crispness in which the nep loops are sufficiently fixed by the inconspicuous high-strength pressing yarn can be obtained.

Basically, the composite design yarn of the present invention is such that the sheath yarn is supplied in the overfeed state to the twisting region of the core yarn in the false twisting process to wind the sheath yarn around the core yarn, Further, it is manufactured by supplying a pressing thread and winding it around the outer circumference of the sheath thread. In manufacturing the composite design thread of the present invention, the distance between the core thread and the sheath thread supply guide, the core thread and the pressing thread supply The distance to the guide and its relationship are important requirements. If the distance between the core yarn and the sheath yarn supply guide becomes long, a nep loop is not formed to form a slab.If the distance between the core yarn and the presser yarn supply guide becomes short, the slab is not formed and the sheath yarn cannot be fixed properly. Will be enough. Therefore, it is necessary to shorten the distance between the core yarn and the sheath yarn supply guide, and to set the pressing yarn supply guide distance larger than the sheath yarn supply guide distance. Preferably, the distance between the core yarn and the sheath yarn supply guide is set to 20 mm or less, and the distance between the core yarn and the pressing yarn supply guide is set to 100 mm or more.

Further, in order to fix the formed nep loop in its proper form, the overfeed rate of the sheath thread and the overfeed rate of the presser thread are also important requirements. The overfeed rate of the presser thread needs to be higher than the overfeed rate of the sheath thread. Preferably, the overfeed rate of the sheath yarn is set to 30 to 200%, and the overfeed rate of the pressing yarn is set to be +10 to 100% larger than the overfeed rate of the sheath yarn.

The method for producing the composite design yarn of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of an example of an apparatus used for manufacturing the composite design yarn of the present invention, in which a second supply roller 5 and a third supply roller 6 are provided on a raw yarn supply side of a false twisting device. The core yarn 1, the sheath yarn 2, and the pressing yarn 3 are supplied from the first supply roller 4, the second supply roller 5, and the third supply roller 6, respectively. In this case, the first supply roller 4 is so arranged that the false twisting of the core yarn 1 is stably performed.
As long as it can constantly supply the core yarn 1, it may be supplied by a constant speed nip roller, or a passive yarn supplying device such as a magnet tensor may be used.

By means of the first heater 7 and the false twisting unit 8 between the supply rollers 4, 5 and 6 and the first take-up roller 9, the composite yarn consisting of the yarns 1, 2 and 3 is subjected to heat-setting by twisting. However, at this time, the sheath yarn 2 is 30 in the twisting area of the core yarn 1.
Since it is supplied at an overfeed rate of ˜200%, the outer periphery of the core yarn 1 is wound to form a nep loop in the yarn axis direction. Further, since the pressing yarn 3 is supplied in an overfeed state that is higher than the overfeed rate of the sheath yarn 2, the outer periphery of the sheath yarn 2 is wound to form a slab. Since the slab portion formed by the pressing yarn 3 is firmly formed in the triple winding structure, the composite yarn passes through the false twist unit 8 without being untwisted. Then, from the first take-up roller 9 to the second take-up roller 1
The composite yarn is heat-treated by the second heater 10 between 1 and wound on the cheese 12 as a composite design yarn.

FIG. 2 is an enlarged side view of an example of a composite design yarn obtained by the manufacturing method of the present invention. (A) is a composite design yarn having a nep, (b) is a composite design yarn having a loop. 22 is a nep of the sheath yarn 2 wound around the core yarn 1 and 22 ′ is a sheath yarn 2 wound around the core yarn 1
The loop 23 is a slab portion of the presser thread 3 formed by being further wound around the sheath thread 2, and the reference numeral 24 is an intermediate part of the presser thread 3.

[0014]

EXAMPLES The present invention will be specifically described below with reference to examples.

(Embodiment 1) Using the apparatus shown in FIG. 1, semi-dal 50d / 24f polyester fiber as core yarn, bright 100d / 26f triacetate fiber as sheath yarn, and semi-dal 30d / 12f polyester fiber as pressing yarn, respectively. Using false twist number 2108 T / M, false twist direction Z, first heater temperature 160 ° C., second heater temperature 170 ° C., sheath yarn supply guide distance 5 mm with core yarn, presser yarn supply guide distance 120 mm with core yarn, 111% overfeed rate for sheath thread, 1 overfeed rate for presser thread
False twisting was performed under the setting condition of 24%. The obtained composite design yarn had a nep of 2 to 6 mm in length. When a woven fabric was made using this composite design yarn, a woven fabric having a crisp feeling which could not be obtained from the conventional composite false-twisted yarn was obtained without nep collapse during the weaving process.

(Example 2) A composite design in which false twisting was performed in the same manner as in Example 1 by setting the processing conditions shown in Table 2 with the configurations of the core yarn, the sheath yarn and the pressing yarn shown in Table 1. I got a thread.
The shape of the nep loop of the obtained composite design yarn is also shown in Table 2, and the formed nep and loop were firmly fixed. In Table 2, the sheath yarn supply guide distance to the core yarn is 0 mm, which means a distance close to 0.

[0017]

[Table 1]

[0018]

[Table 2]

(Comparative Example) A composite false twisted yarn was obtained by performing false twisting under the same conditions as in Example 1 except that the pressing yarn was not used in Example 1. The obtained false-twisted composite yarn had a nep, but the nep collapse occurred during the weaving process.

[0020]

EFFECTS OF THE INVENTION The composite design yarn of the present invention is a composite false-twisted yarn having a nep loop that does not slip through and does not collapse, and is excellent in design effect, and cannot be obtained from conventional composite false-twisted yarn It is capable of imparting a sharpness to a woven or knitted fabric.
Further, such a composite design yarn can be produced without using a low melting point yarn and by slightly attaching it to a false twisting processing device without including a twisting process.
It is extremely useful both economically and in terms of design effect.

[Brief description of drawings]

FIG. 1 is an explanatory view of an example of an apparatus used for producing a composite design yarn of the present invention.

FIG. 2 is an enlarged side view of examples (a) and (b) of the composite design yarn obtained by the manufacturing method of the present invention.

[Explanation of symbols]

 1 core yarn 2 sheath yarn 3 presser yarn 4 first supply roller 5 second supply roller 6 third supply roller 7 first heater 8 false twist unit 9 first take-up roller 10 second heater 11 second take-up roller 12 cheese 22 nep of sheath yarn 2'loop of sheath yarn 2 23 slab portion of holding yarn 3 24 middle portion of holding yarn 3

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kiichi Asano 1103 Yanagibashi-cho, Mitsuke City, Niigata Prefecture 1 Kondo Shoten Co., Ltd. (72) Inventor Shigenobu Hara 1103 Yanagibashi-cho, Mitsuke City Niigata Prefecture 1 Kondo Shoten Co., Ltd. ( 72) Inventor Hidemasa Kondo 1103 Yanagibashicho, Mitsuke City, Niigata Prefecture 1 Kondo Shoten Co., Ltd.

Claims (2)

[Claims] 1. A total fineness of 2 is provided on the outer periphery of a composite yarn having a nep loop formed by winding a sheath yarn around a core yarn.
A composite design yarn comprising a slab portion having a triple winding structure and a midway portion having a single winding structure, which are alternately formed by a pressing yarn having a fineness of 0% or less. 2. A sheath yarn is supplied in an overfeed state to the twisting region of the core yarn in the false twisting process to wind the sheath yarn around the core yarn, and further has a fineness of 20% or less of the total fineness. A composite design characterized in that the presser yarn is supplied from a supply guide distance larger than the supply guide distance of the sheath yarn and in an overfeed state larger than the overfeed ratio of the sheath yarn to be wound around the outer periphery of the sheath yarn. Thread manufacturing method.