JPH10183435A - Composite filament yarn of high shape-stability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composite filament yarn, high in shape-stability and suitable for producing a textile structure excellent in feel of touch. SOLUTION: This composite filament yarn is in the form of heteroshrink- combined filament yarn, bulky textured yarn, slab yarn, ring yarn, braided yarn, or another fancy yarn, each consisting of two or more kinds of fibers selected from the group consisting of thermoplastic synthetic fibers, e.g. polyester, polyamide and polyolefin fibers; natural fibers, e.g. cotton, silk and wool fibers; and man-made fibers, e.g. rayon and cellulose acetate fibers. In this case, the filaments situated virtually inside this composite filament yarn consists of sheath/core-type conjugate yarn, where the core section is lower than the sheath section in softening point, determined by the thermomechanical analysis in accordance with JIS K7196, by at least 20 deg.C, and the core section is composed of an essentially noncrystalline polymer showing no melting peak in the differential thermal analysis in which it is heated at a rate of 10 deg.C/min in a nitrogen atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, cotton, and the like.
Silk, natural fibers such as wool, and rayon, different shrinkage mixed fiber yarn consisting of a combination of a plurality of fibers selected from the group consisting of artificial fibers such as acetate, bulky processed yarn, slab yarn, ring yarn, molding yarn, It also relates to composite yarns such as design yarns. More specifically, the present invention relates to a composite yarn in which a fiber fabric manufactured using at least a part of the composite yarn is suitable for clothing and industrial materials, and can impart a high degree of shape stability. It is.

[0002]

2. Description of the Related Art In recent years, many chemical fibers and synthetic fibers have been produced and used together with natural fibers in various fields in conformity with the respective fiber characteristics, but the fiber characteristics are still unsatisfactory for specific applications. It was. For this reason, these fibers have been blended, twisted or twisted to give new properties and to meet their uses.

Recently, improvement and improvement of yarns made of thermoplastic synthetic fibers have been promoted, and yarns having a feeling equal to or better than that of natural fibers have appeared. . Examples of these yarns include "different shrinkage mixed yarn" disclosed by the present applicant in JP-A-1-331505, "bulky processed yarn" disclosed in Japanese Patent Publication No. 59-242412, and Examples include "slab yarn" described in JP-B-60-14132, ring yarn, molding yarn, and other design yarns.

[0004]

Each of the above-mentioned yarns has a unique structure of a composite yarn, and when formed into a knitted woven fabric using this, the fabric is made of natural fibers or regular type thermoplastics. It has a unique texture that cannot be exhibited with synthetic fiber yarns.

[0005] On the other hand, clothes and curtains have been creased and pleated for a long time, but their durability is still insufficient. In addition, in order to impart durable folds and pleating to clothing materials using different shrinkage mixed fiber yarns, bulky processed yarns, design yarns, etc., processing such as coating and laminating is required. The texture was often impaired.

An object of the present invention is to provide a plurality of fibers selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate. When supplied to a knitted fabric with the conventional appearance and feel of composite yarns such as different shrinkage mixed yarns, bulky processed yarns, slab yarns, ring yarns, molding yarns, and other design yarns consisting of a combination of An object of the present invention is to provide a novel composite yarn capable of imparting excellent morphological stability.

[0007]

In order to achieve the above object, the present invention has the following arrangement. That is, the first invention of the present invention is a polyester, polyamide, thermoplastic synthetic fibers such as polyolefins, cotton, silk, natural fibers such as wool,
And rayon, hetero-shrinkage mixed fiber yarn consisting of a combination of multiple types of fibers selected from the group consisting of artificial fibers such as acetate,
In composite yarns such as bulky processed yarns, slab yarns, ring yarns, molding yarns, and other design yarns, filaments mainly located inside the composite fiber yarns are JIS K71.
The softening point of the core component measured by the thermomechanical analysis method of No. 96 is formed by a core-sheath composite yarn lower than the softening point of the sheath component by 20 ° C. or more, and the core component of the core-sheath composite yarn is under a nitrogen atmosphere, 1
Thermoplastic synthetic fiber filaments made of a substantially amorphous polymer that does not generate a melting point peak by differential thermal analysis at a heating rate of 0 ° C./min (hereinafter, such filaments are referred to as specific filaments in the present invention). This is a composite yarn having excellent shape stability.

A second invention of the present invention is a polyester,
Thermoplastic synthetic fibers such as polyamide and polyolefin,
After combining two or more yarns having different boiling water shrinkage rates selected from the group consisting of natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate, the two are mixed by fluid entanglement. A composite yarn excellent in morphological stability, characterized in that the specific multifilament is used as a yarn on the high boiling water shrinkage ratio side mainly located in the different shrinkage mixed fiber.

Further, a third invention of the present invention is a polyester,
Thermoplastic synthetic fibers such as polyamide and polyolefin,
Two or more fiber yarns having a difference in elongation of at least 50% selected from the group consisting of natural fibers such as cotton, silk, wool, and the like, and artificial fibers such as rayon, acetate, etc. are aligned and tentatively combined. A composite yarn excellent in form stability, characterized in that the specific filament is used as a low elongation yarn mainly located inside the processed yarn in a bulky processed yarn entangled by twisting.

Further, a fourth invention of the present invention relates to a slab yarn formed by winding a sheath yarn around a core yarn along a longitudinal direction thereof so that a single spiral portion and a multiple spiral portion are alternately formed. , Sheath yarn is polyester, polyamide, thermoplastic synthetic fiber such as polyolefin, cotton, silk,
Consisting of one or more fibers selected from the group consisting of natural fibers such as wool, and artificial fibers such as rayon and acetate,
A composite yarn excellent in form stability, characterized in that the specific filament is used as the filament on the core yarn side.

The composite yarns of the present invention, such as hetero-shrinkage mixed fiber yarns, bulky processed yarns, slab yarns, ring yarns, molding yarns, and other design yarns, all have a specific filament according to the present invention as a core component. And polyester, polyamide, thermoplastic synthetic fibers such as polyolefins, natural fibers such as cotton, silk, wool, and rayon, and a combination of at least one fiber selected from the group consisting of artificial fibers such as acetate. I do.

The composite yarn constituting the specific filament which forms the core of the composite yarn of the present invention is JIS K7196.
A core-sheath composite yarn having a softening point of the core component measured by the thermomechanical analysis method of which is 20 ° C. or more lower than the softening point of the sheath component, and the core component of the core-sheath composite yarn is 10 ° C./min in a nitrogen atmosphere. It consists of a substantially amorphous polymer which does not generate a melting point peak by a differential thermal analysis method (hereinafter, referred to as a DSC method) in which heating is performed at a heating rate of.

In the specific filament, the sheath component may be a usual fiber-forming polymer such as an ester polymer or an amide polymer, but the softening point of the core component is at least 20 ° C. higher than the softening point of the sheath component. It needs to be low.

In particular, it is preferable to use a core-sheath type composite yarn comprising a polymer whose sheath component is made of polyester and whose core component has a glass transition point of 60 to 80 ° C. and a softening point of 200 ° C. or less. preferable.

The core component comprises a substantially amorphous polymer which does not produce a melting point peak in differential thermal analysis in which heating is performed at a rate of 10 ° C./min in a nitrogen atmosphere. Specifically, a copolymerized polyester polymer is preferable.

A typical example of such an amorphous polymer contains terephthalic acid and ethylene glycol as main components,
As the copolymerization component, one or two or more known dicarboxylic acid components such as oxalic acid, malonic acid, succinic acid, adipic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, naphthalenedicarboxylic acid, and diphenyl ether dicarboxylic acid are used as the acid component. Or more, and one or more known diol components such as 1,4-butanediol, neopentyl glycol, propylene glycol, hexamethylene glycol, diethylene glycol, and 1,4-cyclohexanedimethanol as diol components. And copolymerized polyesters. Diethylene glycol, polyethylene glycol and the like may be added as other copolymer components.

Such copolymerized polyesters may be those obtained by appropriately selecting the above-mentioned copolymer components so as to have a desired softening point within a range of physical properties which do not impair spinning and processing operability. Those containing an acid and ethylene glycol as main components and isophthalic acid as a copolymerization component are preferable because they are industrially inexpensive, can be obtained stably, and have good polymer properties. In such an isophthalic acid copolymerized polyester, the isophthalic acid component has a content of 20 to 40.
%, And the core / sheath ratio of the core-sheath type composite yarn is 5/1 to 1/5, particularly 3/1 to 1 in volume ratio.
/ 2 is preferable. The cross-sectional shape of the composite yarn may be any of a circle, an ellipse, a polygon, a star, and the like.
The core and the sheath may be arranged concentrically or eccentrically, but it is generally preferable to use a core having a circular cross section and having the core and the sheath arranged concentrically.

Since the specific filament uses a substantially amorphous polymer having a low crystallinity as a core component, it reversibly softens even if heating and cooling are repeated.
The solidification can be repeated, and the form can be applied to the fabric again. In addition, the present inventors have already proposed that when a specific filament is used alone, the yarn is easily flattened and deformed by heating under pressure, so that the entangled point of the fabric is filled, and wind resistance and water resistance are improved. (Japanese Patent Application No. 8-40715)
issue).

On the other hand, in the case of using a composite yarn using a crystalline polymer as the core component, the crystal portion of the polymer grows as a nucleus during heating, and the reset temperature gradually increases. Obstacles during processing and form setting,
There is a disadvantage that desired setting properties cannot be obtained.

The present invention relates to a composite yarn comprising a specific filament having the above-mentioned properties and another fiber, and specifically, a hetero-shrinkage mixed fiber yarn, a bulky processed yarn, a slab yarn, a ring yarn, a molding yarn. And other design yarns.
Other fibers combined with the specific filament are selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide, and polyolefin; natural fibers such as cotton, silk, and wool; and artificial fibers such as rayon and acetate. It is a kind of fiber.

When the composite yarn is a hetero-shrinkage mixed fiber, it may be selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate. At least two selected yarns having different boiling water shrinkage ratios, and the high shrinkage yarns are located inside the yarns by shrinkage treatment after fiber blending. Therefore, the specific filament is used as the yarn on the high shrinkage ratio side.
Further, the bulky processed yarn has a difference in elongation selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate. More than one kind of yarn, and the low elongation processed yarn is positioned inside the yarn by false twisting after the combination. Therefore, a specific filament is used as the low elongation processed yarn. In addition, the slab yarn naturally uses a specific filament as the core yarn since the core yarn forms the inside of the yarn. That is, in the present invention, a high degree of form stability is imparted by using the specific filament according to the present invention as the yarn located inside the composite yarn.

The structure of each composite yarn will be described in more detail. First, in the case of a different shrinkage mixed fiber, the specific filament is a high boiling water shrinkage yarn having a boiling water shrinkage of 10 to 30%. Use as Other constituent yarns have a boiling water shrinkage of 0.
It is used as a low boiling water shrinkage yarn of １５15%, and is selected so that the difference in shrinkage between the specific filament and other constituent yarns is 5% or more, preferably 10% or more. The process of fluid entanglement may be during the spinning step, during the drawing step, during the subsequent fiber-mixing step, or during the direct spinning and drawing step. In such a different shrinkage mixed fiber, the fiber (specific filament) on the high boiling water shrinkage side is mainly located inside the yarn due to boiling water shrinkage treatment after knitting. Then, by heat setting, the high shrinkage component (specific filament side) has the form stability as described above. Therefore,
While maintaining the morphological stability, the properties such as the swelling of the fiber on the low shrinkage rate side are not impaired.

Next, in the case of the bulky yarn, the specific filament is used as a low elongation yarn. Other constituent yarns are used as high elongation processed yarns. The difference in elongation between the two is 50% or more. As a result, when formed into a final product, the specific filaments located inside the composite yarn have shape stability, and the other constituent yarns located outside have bulges, so that the overall composite yarn is bulky. It has excellent shape and excellent texture.

In the slab yarn, by using a specific filament for the core yarn and other constituent yarns for the sheath yarn, the fabric as a whole has excellent shape stability, and the slab yarn originally has There is no loss of appearance quality and texture.

In order to exhibit form stability using the composite yarn of the present invention, it is preferable to use the composite yarn at least 30% or more, more preferably 50% or more of the whole fabric. When pleats or folds are applied in the warp or weft direction of the woven fabric, it is desirable to use at least 25% or more, preferably 30% or more, and more preferably 40% or more of the yarn perpendicular to the pleat line.

The heat setting for imparting shape retention to the fabric using the composite yarn of the present invention can be performed by setting finishing of a normal polyester fabric or the like. When a special form is applied, the desired product can be obtained more effectively by heat setting after adjusting to a desired form.

Products such as umbrellas require a function of water pressure resistance in addition to form stability. When using a fabric comprising the composite yarn of the present invention in such a product, the mixture ratio of the specific filament of the present invention in the fabric is increased, and the specific filament is deformed by heat-setting the fabric to obtain a woven fabric. Fill the voids to provide water resistance. In addition, it is possible to provide a durable fold form by heat setting the umbrella in a folded state.

The fabric using the composite yarn of the present invention has the following advantages. (1) A garment or material cloth having a good feeling, surface feel, and appearance is given a shape retention property excellent in durability only by a simple heat setting. (2) Release the heat-set shape by heating again,
It is possible to heat set to a new shape. For example,
After producing a pleated curtain with a fold of 5 cm width by heat setting, the pleats are removed by heating, and the pleated curtain with a different fold (for example, a fold of 3 cm width) is set again. It becomes possible. (3) The shape retention obtained in this way has high washing durability. (4) The specific filament component hardly appears on the surface of the fabric, so that the texture of other fibers is not impaired. Even if it appears, the sheath component of the specific filament is made of a regular polyester or polyamide component, so that the texture is significantly impaired. And has little effect on dyeability and fastness.

[0029]

Embodiments of the present invention will be specifically described below. In addition, the morphological stability in the examples is such that a sample is wound around a glass tube having a diameter of 10 mm, heat-set, cooled, and spread, and a load of 100 g / cm ² is placed thereon. After 5 minutes, the load is removed. The winding state is visually judged, and in the test results, ○ indicates good, Δ indicates normal, and × indicates poor.

[0030]

【Example】

Example 1 Isophthalic acid occupies 25 mol% of the acid component, and a copolymerized polyethylene terephthalate having a softening point of about 150 ° C. having substantially no melting point peak as measured by a DSC method is used as a core component, and the acid component is terephthalic acid. 100% polyethylene terephthalate (melting point 255 ° C., softening point 2
40: 1) as the sheath component (volume ratio) 1: 1, 5
50d / 48f composed of a core-sheath type composite filament having a boiling water shrinkage of 21.0% at 0d / 24f and polyethylene terephthalate having an intrinsic viscosity of 0.64, and a boiling water shrinkage of 8.0%
(Stretched) and a low shrinkage filament were drawn and then twisted, and simultaneously passed through an interlace nozzle, both threads were entangled with fluid, mixed, and wound around a bobbin. Weaving a plain woven fabric having a warp / weft density of 110 yarns / in × 80 yarns / in using this mixed yarn as a weft and a 50d / 48f raw yarn of a regular polyester having an acid component of 100% terephthalic acid as a warp yarn. The fabric of Example 1 was obtained.

(Comparative Example 1) On the other hand, instead of the core-sheath type composite filament of Example 1, a 50f / 24d boiling water shrinkage ratio 22
% Of the regular polyester, and then the mixture was blended under the same conditions as in Example 1 and driven into a weft to obtain a woven fabric of Comparative Example 1.

After the fabrics of Example 1 and Comparative Example 1 were dyed and finished with ordinary polyester fabric, a heat set of form stability was performed to measure the form stability of each fabric. Table 1 shows the results.

[0033]

[Table 1]

(Example 2) Isophthalic acid contained 25 as an acid component.
A core-sheath type composite comprising a copolymer polyethylene terephthalate having a softening point of about 150 ° C., which has a melting point of about 100% by mole and has substantially no melting point peak as measured by DSC, and a sheath comprising polyethylene terephthalate having an acid component of 100% terephthalic acid. The yarn has a core-sheath ratio (volume ratio) of 1: 1 and a residual elongation of 32.
%, A drawn yarn (75d / 36f) and a polyester semi-drawn yarn having a residual elongation of 121% were aligned and entangled, and then false-twisted under the following conditions to obtain a 200d / 7% yarn.
3f bulky yarn was obtained. Using this processed yarn as both warp and weft, a plain fabric was woven to obtain a fabric of Example 2. False twist processing conditions Spindle rotation speed: 250,000 R / M Twist number: 2,530 T / M Heater temperature: 180 ° C Feed rate: -5% Winding rate: + 6.2%

On the other hand, a combination of a regular polyester drawn yarn having a residual elongation of 28% (75d / 36f) and a regular polyester semi-drawn yarn having a residual elongation of 121% (115d / 36f) was used. False twisting was performed under the same conditions as in Example 2 to obtain a false twisted yarn of 200d / 72f). A plain fabric was woven using this false twisted yarn for both the warp and the weft to obtain a fabric of Comparative Example 2.

The fabrics of Example 2 and Comparative Example 2 were subjected to the same processing as in Example 1, and the morphological stability was measured. Table 2 shows the results.

[0037]

[Table 2]

(Example 3) Isophthalic acid was 25% of the acid component.
Mol%, and has a core component of copolymerized polyethylene terephthalate having a softening point of about 150 ° C. having substantially no melting point peak as measured by the DSC method, and an acid component of terephthalic acid 10
0% polyethylene terephthalate (melting point 255)
C, a softening point of 240 ° C) as a sheath component, a core-sheath type composite yarn (50d / 24f) having a core-sheath ratio (volume ratio) of 1: 1 as a core yarn, and a 50d / 96f polyester drawn yarn as a sheath yarn. The slab yarn of Example 3 was obtained by passing through normal false twisting under the following conditions. Note Spindle rotation speed: 185,500 R / M Twist number: 3,040 T / M Heater temperature: 200 ° C Overfeed rate of sheath yarn: + 50% False twist feed rate: -3.1% Winding rate: + 6.2% Wound yarn tension: 0 to 1 g / d

On the other hand, the slab yarn of Comparative Example 3 was produced under the same conditions as in Example 3 using a 50d / 24f polyethylene terephthalate yarn having an acid component of 100% terephthalic acid instead of the core-sheath composite yarn. did. The slab yarns of Example 3 and Comparative Example 3 thus obtained were used as warps.
It was woven into a weft of a satin woven fabric (5 jumps of 3 satins) using a 75d / 36f normally processed yarn. Example 3
-1 indicates that the slab yarn produced by the above method has a weft of 25.
%, And Example 3-2 accounts for 50%. In Comparative Example 3, the slab yarn occupies 50% of the weft. After subjecting the woven fabric to the usual polyester processing, the morphological stability was measured. Table 3 shows the results.

[0040]

[Table 3]

[0041]

As described above, the composite yarn of the present invention is formed by using the specific filament of the present invention mainly for at least a part of the composite yarn to thereby make the composite yarn at least partially. The purpose is to impart a function of excellent form stability to the used fabric.

Claims (4)

[Claims] 1. A combination of a plurality of fibers selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate. In composite yarns such as hetero-shrinkage mixed fiber yarns, bulky processed yarns, slab yarns, ring yarns, molding yarns, and other design yarns, the yarns mainly located inside the composite fiber yarns are JIS K719.
6, the softening point of the core component measured by the thermomechanical analysis method is formed by a core-sheath composite yarn lower than the softening point of the sheath component by 20 ° C. or more, and the core component of the core-sheath composite yarn is 1
Composite having excellent form stability characterized in that it is a thermoplastic synthetic fiber filament made of a substantially amorphous polymer which does not generate a melting point peak by differential thermal analysis in which heating is performed at a heating rate of 0 ° C./min. Thread. 2. A thermoplastic synthetic fiber such as polyester, polyamide and polyolefin, natural fiber such as cotton, silk and wool, and artificial fiber such as rayon and acetate. Different shrinkage blended yarns obtained by combining different yarns and then mixing by fluid entanglement are used as JIS K yarns on the high boiling water shrinkage side.
A core-sheath type composite yarn having a softening point of the core component measured by the thermomechanical analysis method of 7196 lower than the softening point of the sheath component by 20 ° C. or more, and the core component of the composite yarn is 10 ° C./min. A composite yarn excellent in form stability, characterized by using a thermoplastic synthetic fiber filament made of a substantially amorphous polymer which does not generate a melting point peak by differential thermal analysis at a heating rate. 3. The elongation difference selected from the group consisting of thermoplastic synthetic fibers such as polyester, polyamide and polyolefin, natural fibers such as cotton, silk and wool, and artificial fibers such as rayon and acetate is at least 50%. In a bulky textured yarn obtained by drawing and combining two or more types of fiber yarns and entangled by false twisting, a thermomechanical machine of JIS K 7196 is mainly used as a low elongation yarn located inside the textured yarn. The softening point of the core component measured by the analytical method is 20
The core component of the composite yarn is substantially amorphous without a melting point peak by a differential thermal analysis method in which the core component is heated in a nitrogen atmosphere at a rate of 10 ° C./min. A composite yarn having excellent morphological stability, characterized by using a thermoplastic synthetic fiber filament made of the polymer described in (1). 4. Around the core yarn and along its longitudinal direction,
In a slab yarn in which a sheath yarn is wound so that a single spiral portion and a multiple spiral portion are alternately formed, the sheath yarn is a thermoplastic synthetic fiber such as polyester, polyamide, or polyolefin, or a natural fiber such as cotton, silk, or wool. And at least one kind of fiber selected from the group consisting of artificial fibers such as rayon, acetate, etc., and JI as a core yarn.
A core-sheath type composite yarn having a softening point of the core component measured by a thermomechanical analysis method of SK7196 lower than the softening point of the sheath component by 20 ° C. or more is formed.
Composite yarn having excellent morphological stability, characterized by using a thermoplastic synthetic fiber filament made of a substantially amorphous polymer that does not generate a melting point peak in a differential thermal analysis method of heating at a heating rate of 1 / min. Article.