JPH11117137A - Spun yarnlike bulk yarn excellent in water absorbing and moisture absorbing and desorbing property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a spun yarnlike bulk yarn capable of imparting excellent water absorbing and moisture absorbing and desorbing properties, a spun yarnlike appearance and touch feeling to a fabric prepared by knitting or weaving. SOLUTION: This spun yarnlike bulk yarn is an interlaced combined filament yarn of a two-layer structure obtained by arranging a core-sheath type conjugated fiber A comprising a core component composed of a modified water-insoluble polyethylene oxide or a mixture thereof with a polyamide and a sheath component composed of the polyamide in a core part and another thermoplastic synthetic fiber B in a sheath part. The interlaced combined filament yarn has >=130% bulkiness degree and >=100 loop fuzzes/m index of the loop fuzzes formed on the yarn surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky yarn capable of imparting excellent water absorption and moisture absorption / desorption properties and a spun-like appearance and feeling to a fabric obtained by knitting and weaving.

[0002]

2. Description of the Related Art Synthetic fibers are superior to natural fibers such as cotton, hemp, wool, and silk in terms of strength, abrasion resistance, dimensional stability, wash-and-wear, and quick-drying properties. Widely used as a material. However, synthetic fibers generally do not have the excellent water-absorbing and moisture-absorbing properties of natural fibers, and produce sweat and stickiness due to sweating when worn, and are inferior to natural fibers in terms of comfort.

Hitherto, various attempts have been made to impart water absorbency or moisture absorbability to synthetic fibers. For example, a hydrophilic polyester fiber blended with a polyalkylene glycol (Japanese Patent Publication No. 39-5214), a hollow fiber having a groove penetrating from the fiber surface to the hollow portion (Japanese Patent Publication No. 60-37203), and having a metal sulfonate group. Microporous fiber obtained by alkali-treating a polyester fiber containing a condensate of a compound and polyoxyalkylene glycol (JP-A-60-16)
No. 7969) has been proposed. However, none of these fibers had a low level of hygroscopicity and did not simultaneously satisfy both water absorbing and hygroscopic properties at a sufficient level.

As a method for imparting water absorbency or hygroscopicity to synthetic fibers by post-processing, there is known a method in which vinyl carboxylic acid is graft-polymerized using a radical initiator, an electron beam or the like. However, this method has various problems, such as a decrease in fiber strength, hardening of the hand, and insufficient durability of the effect, and has a fatal drawback in that the dyeing fastness is reduced. There are hardly any examples practically used as fibers for use.

[0005] On the other hand, many spun-like yarns for clothing, so-called Taslan yarns, in which synthetic fibers are air-jet processed to form loop fluff and sagging together with confounding, have been proposed. Of these yarns, the core-sheath double-layer yarn obtained by using a plurality of multifilament yarns and imparting yarn length differences to form entanglement and loop fluff has a bulky and spun-like feel. In addition, the voids produced by the yarn form exhibited an excellent effect of water absorption, but did not have moisture absorption / release properties.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks and provides a fabric obtained by knitting and weaving with excellent water absorption, moisture absorption and desorption, and a spun-like appearance and feeling. An object of the present invention is to provide a spun-like bulky yarn that can be provided at the same time.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, when producing a core-sheath double-layer yarn by giving a yarn length difference by air jet processing,
The present inventors have found that the water absorption and the moisture absorption / desorption properties are improved by disposing a composite fiber mixed with a water-insoluble and water-insoluble polyethylene oxide modified product having a water absorption / hygroscopic property on the core side.

That is, the present invention provides a core-sheath composite fiber comprising a core component comprising a water-insoluble polyethylene oxide modified product or a mixture of the modified product and polyamide, and a sheath component comprising polyamide, A mixed-fiber entangled yarn having a double-layered structure in which another thermoplastic synthetic fiber is disposed in a sheath portion, wherein the mixed-fiber entangled yarn has a bulk height of 130% or more represented by the following formula and has a loop formed on the yarn surface: The gist of the present invention is a spun-like bulky yarn excellent in water absorption and moisture absorption and desorption properties, characterized in that the fluff index is 100 pieces / m or more. Bulk altitude (%) = (A / B) × 100 A: Apparent thickness of mixed-fiber entangled yarn B: Apparent thickness before mixed-fiber entanglement However, A and B for calculating bulk altitude are mixed entangled yarn. 100T / M real twist is applied to the yarn before mixing and entanglement, and 0.1g /
It is an average value obtained by measuring the apparent thickness of any five places under the load of d. The loop fluff index is
The number of loop fluffs counted using a fluff measuring instrument F-Index (manufactured by Shikishima Spinning Co., Ltd.) with the gauge set to 0.3 mm.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

In the present invention, in order to impart high water absorbency and moisture absorption / desorption property to the mixed-fiber entangled yarn having a two-layered core-sheath structure, a water-insoluble polystyrene is used as the core yarn constituting the mixed-fiber entangled yarn. It is necessary to use a core-sheath type composite fiber composed of a core component composed of a modified ethylene oxide or a mixture of the modified product and polyamide and a sheath component composed of polyamide.

The term "water-insoluble polyethylene oxide-modified product" as used in the present invention means a water-soluble polyethylene oxide (including those containing a copolymer component such as propylene oxide and butylene oxide as long as its properties are not significantly impaired).
Are cross-linked using an appropriate cross-linking agent, have water absorption and hygroscopicity, and can be melt-processed at a temperature of 300 ° C. or lower.

As the cross-linking agent, an aldehyde, dialdehyde, diamine, diisocyanate, bisepoxy compound or the like is used, and those which are not colored by the cross-linking treatment and which do not significantly reduce the water absorption and moisture absorption performance of polyethylene oxide are selected. And use it. Such a water-insoluble polyethylene oxide modified product is commercially available, for example, from Sumitomo Seika Kogyo Co., Ltd. under the trade name "Aqua Coke".

The polyamide used as a part of the core component of the core-sheath type composite fiber or as the sheath component includes nylon 6, nylon 66, nylon 11, nylon 12, nylon M × D (polymethaxylylene adipamide and the like). And the like, and copolymers or mixtures containing these as main components.

In the present invention, a water-insoluble polyethylene oxide modified product can be used alone as a core component,
This modified product and the above-mentioned polyamide can be mixed and used. When used as a mixture, both may be melted and mixed in advance to form a master chip.

The content of the water-insoluble polyethylene oxide modified material in the core-sheath type composite fiber depends on the kind of polyamide used and the composite ratio of the core component and the sheath component, and thus the moisture absorption / release properties of the obtained fiber are different. Although not particularly limited, it is generally preferable that the content be in the range of 0.5 to 60% by weight of the core-sheath type composite fiber. If the content of the water-insoluble polyethylene oxide modified product is less than 0.5% by weight, the desired moisture absorption / desorption property may not be obtained, and if the content exceeds 60% by weight, a problem may occur in the spinning properties. Is not preferred.

The core-sheath type conjugate fiber used in the mixed-fiber entangled yarn having the core-sheath two-layer structure of the present invention can be produced according to a conventional method. Here, the composite ratio of the core-sheath component depends on the polymer used and the degree of required performance, but is 15/15 by weight.
It is preferably in the range of 85 to 85/15. If the ratio of the core component is smaller than this, the moisture absorption and desorption properties are inferior. On the other hand, if the core component is too large, there may be a problem in the spinning properties.
Not preferred.

Next, other thermoplastic synthetic fibers which are mixed and entangled with the above-mentioned core-sheath type composite fibers are not particularly limited as long as they are multifilament yarns such as nylon and ester. What is necessary is just to select suitably. The form of the yarn may be raw yarn, but if false twisted crimped yarn is used, the loop fluff formed on the yarn surface will be densified, and the unwinding property in the subsequent process will be further improved. Can be.

The bulky processed yarn of the present invention is required to be a two-layered mixed entangled yarn in which the above-mentioned core-sheath type conjugate fiber is provided in a core portion and another thermoplastic synthetic fiber is provided in a sheath portion. The mixed fiber entangled yarn having a two-layer structure is used for imparting sufficient bulkiness and obtaining a yarn excellent in form fastness, and the yarn shape can further improve the water absorption performance. further,
When the core-sheath composite fiber is placed on the core of the two-layer structure, when sweat and moisture are absorbed while wearing clothes, the water-absorbing and moisture-absorbing effects of the core-sheath composite fiber work, and the water is absorbed by the core of the yarn. . Therefore, the sheath thread that directly touches the skin has little wetness, does not feel slimy or sticky, and can maintain comfort.

Next, the mixed fiber entangled yarn of the present invention needs to have a bulk height represented by the above formula of 130% or more. By setting the bulk height to 130% or more, it is possible to impart water absorption similar to that of natural fibers, and it is possible to obtain a yarn excellent in water absorption in combination with the water absorption performance of the core-sheath composite fiber. If the bulk height is less than 130%, sufficient water absorbing performance cannot be obtained, which is not preferable.

Further, in the present invention, it is necessary that the loop fluff index formed on the surface of the yarn of the mixed entangled yarn is 100 yarns / m. By setting the loop fluff index to 100 pieces / m or more, a spun touch appearance and tactile sensation are provided,
A bulky processed yarn having excellent spun like property can be obtained. If the loop fluff index is less than 100 pieces / m, the span-like feeling is impaired, which is not preferable.

The present invention, as described above, uses a core-sheath type composite fiber composed of a core component composed of a water-insoluble polyethylene oxide modified product or a mixture of the modified product and polyamide, and a sheath component composed of polyamide. As a result, water absorption and moisture absorption / desorption properties can be obtained, and the synergic effect of the fiber properties and yarn form can be obtained by using a two-layered mixed entangled yarn in which core-sheath type composite fibers are arranged on the core side. This dramatically improves the water absorption performance, imparts water absorption performance close to that of natural fibers, and gives a spun-like bulky yarn excellent in water absorption and moisture absorption / desorption properties.

Next, an embodiment of the method for producing a spun-like bulky processed yarn of the present invention will be described with reference to the drawings.

FIG. 1 shows an example in which the yarn arranged on the sheath side is subjected to false twist crimping. In FIG. 1, a thermoplastic synthetic fiber B is supplied to a false twist area by a first supply roller 1, and is subjected to false twist crimping with a first take-up roller 5 by a heater 3 and a twisted body 4. It becomes a crimped yarn b. The crimped yarn b is continuously supplied to the fluid treatment area and guided to the fluid entanglement nozzle 6.

On the other hand, a core-sheath type composite fiber A composed of a core component composed of a water-insoluble polyethylene oxide modified product or a mixture of the modified product and polyamide, and a sheath component composed of polyamide is supplied from the second supply roller 2. The fluid is supplied to the fluid treatment area and guided to the fluid entanglement nozzle 6 together with the crimped yarn b.
In this case, the crimped yarn b serving as the sheath yarn is supplied more than the core-sheath composite fiber A serving as the core yarn.

The yarns A and b are subjected to an air jet process in the fluid entanglement nozzle 6 so that the yarn A has a core-sheath two-layer structure in which the yarn A is a core yarn and the yarn b is a sheath yarn. Mainly yarn b
The yarn becomes a spun-like bulky yarn having fine loop fluff formed of the filaments, and is wound up by a winding roller 8 via a second take-up roller 7 into a package.

In order to obtain a mixed-fiber entangled yarn having a bulk height of 130% or more and a loop fluff index of 100 / m or more by performing the above air jet processing, the oversupply amount of the crimped yarn b must be 10% or more. It is desirable that the difference in the supply amount between the crimped yarn b and the core-sheath type composite fiber A is 5% or more. In the present invention, the fluid entanglement nozzle used in the air jet processing may be any nozzle as long as it can form entanglement and loop fluff on the yarn.

[0027]

Next, the present invention will be described more specifically with reference to examples. The measurement of the performance in the examples was performed by the following method. (1) Moisture absorption / desorption property After drying the sample at 105 ° C. for 2 hours and measuring the weight W ₀ , the sample was conditioned at a temperature of 25 ° C. and a relative humidity of 60% for 2 hours, and the weight W ₁ was measured. The initial moisture content M ₀ is determined by the following equation (A). Next, the sample was allowed to absorb moisture at a temperature of 34 ° C. and a relative humidity of 90% for 24 hours.
₂ is measured, and the water content M ₁ is calculated by the following equation (b). Subsequently, the sample was subjected to a temperature of 25 ° C. and a relative humidity of 60.
%, The weight W ₃ is measured, and the moisture content M ₂ after dehumidification is calculated by the following equation (C). M ₀ (%) = [(W ₁ −W ₀ ) / W ₀ ] × 100 (a) M ₁ (%) = [(W ₂ −W ₀ ) / W ₀ ] × 100 (b) M ₂ (% ) = [(W ₃ −W ₀ ) / W ₀ ] × 100 (c) (2) Water absorption R (%) = [(W ₆₀ −W) / W] × 100 A sample was taken at a temperature of 25 ° C. and a relative humidity of 60. %, The sample weight W before water absorption adjusted for 2 hours under the condition of
The L-1907 5,3 water absorption measurement method specified in measuring the weight W ₆₀ of the water sample after 1 minute, obtaining a water absorption R according to the above equation.

Example 1 85 parts by weight of nylon 6 having a relative viscosity of 2.6 measured in an m-cresol solvent at a concentration of 0.5 g / deciliter and a temperature of 20 ° C. were mixed with 85 parts by weight of Aqua Coke (Sumitomo Seika Kogyo Co., Ltd. A mixture obtained by dry-blending 15 parts by weight of a (water-soluble polyethylene oxide modified product) was used as a core component, the above nylon 6 was used as a sheath component, and a core / sheath type composite fiber having a core / sheath component weight ratio of 50/50 was melt-spun. . At that time, the spinning is performed at a spinning temperature of 255 ° C. using a spinneret having 12 discharge holes, and the spun yarn is cooled by blowing air at 18 ° C.
After applying the oil agent, it was wound up at 1300 m / min and stretched 3.0 times to obtain a core-sheath type composite fiber of 50d / 12f.

The core-sheath type composite fiber 50d / 1 obtained above
2f and nylon 6 fiber 50d / 48f as supply yarns,
Taslan nozzle manufactured by Heberline (Hemmerjet T-
Using 311), a bulky processed yarn was manufactured according to the process of FIG. 1 under the processing conditions of Table 1. Next, the bulky processed yarn is used for the warp and the weft, and the warp density is 110 / 2.54 cm and the weft density is 80.
A plain fabric of 2.54 cm per book was woven and dyed according to a conventional method.

Example 2 A bulky processed yarn and a woven fabric were obtained in the same manner as in Example 1 except that no false twist crimping was performed in the step of FIG.

Comparative Example 1 Comparative mixed entangled yarn and woven fabric were produced in the same manner as in Example 1, except that the mixture of aqua coke and nylon 6 used as the core component of the sheath-core composite fiber was changed to nylon 6. I got Comparative Example 2 Example 1 except that the processing conditions of the air jet were changed.
In the same manner as in the above, a mixed fiber entangled yarn and a woven fabric were obtained.

Table 1 shows the properties of the processed yarns obtained in Examples 1 and 2 and Comparative Examples 1 and 2, and the evaluation results of the woven fabric.

[0033]

[Table 1]

As is clear from Table 1, the woven fabric made of the bulky yarns obtained in Examples 1 and 2 has excellent water absorption and moisture absorption / desorption properties, and also has a spun-like feel and is comfortable. It was suitable as a clothing material.

On the other hand, the fabric of Comparative Example 1 in which aqua coke (water-insoluble polyethylene oxide) was not present in the core component of the core-sheath type composite fiber had a spun-like feeling, but was inferior in moisture absorption and desorption properties. . The woven fabric of Comparative Example 2 having a low bulk height and a small loop fluff index had excellent moisture absorption / desorption performance, but was inferior in water absorption and spun like feeling.

[0036]

The knitting and weaving of the spun-like bulky processed yarn of the present invention significantly improves the water absorption performance due to the synergistic effect brought about by the yarn form of the core-sheath type composite fiber having water absorption and moisture absorption / desorption properties and the mixed entangled yarn. And an improved fabric can be obtained. In addition, this fabric has a spun-like appearance and feel due to the yarn characteristics of the mixed fiber entangled yarn, and can provide a garment material having excellent comfort.

[Brief description of the drawings]

FIG. 1 is a schematic process chart showing one embodiment of a method for producing a spun-like bulky processed yarn of the present invention.

[Explanation of symbols]

 A core-sheath type composite fiber B, b thermoplastic synthetic fiber 3 heater 4 twisted body 6 fluid entangled nozzle

Claims (1)

[Claims] 1. A core-sheath composite fiber composed of a core component comprising a water-insoluble polyethylene oxide modified product or a mixture of the modified product and polyamide, and a sheath component comprising polyamide as a core portion, and other thermoplastic materials. Synthetic fiber arranged in sheath 2
A mixed-fiber entangled yarn having a layer structure, wherein the mixed-fiber entangled yarn has a bulk height represented by the following formula of 130% or more and a loop fluff index formed on the yarn surface of 100 yarns / m or more. Spun-like bulky processed yarn with excellent water absorption and moisture absorption / release properties. Bulk altitude (%) = (A / B) × 100 A: Apparent thickness of mixed fiber entangled yarn B: Apparent thickness before mixed fiber entanglement