JP2002249944A - Composite coated elastic yarn, method for producing composite coated elastic yarn, and knitted fabric - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide excellent stretch characteristics and high-quality soft texture without causing "whitening" or "opening" at the time of elongation of a knitted fabric using a coated elastic yarn. Provided are a composite-coated elastic yarn, a method for producing the composite-coated elastic yarn, and a knitted fabric. A multifilament false-twisted sheath yarn is substantially non-twisted around a core elastic yarn, and a long or short fiber yarn is further wound around the outer periphery of the false-twisted coated elastic yarn. A composite-coated elastic yarn, which is wound at 2000 T / m.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knitted fabric using a composite-coated elastic yarn, and more particularly to a composite-coated elastic yarn and a composite that give softness, voluminousness and stretch characteristics to tights, body shirts, stretch fabrics and the like. The present invention relates to a method for producing a coated elastic yarn and a knitted fabric.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 3-10739 (Patent No. 1)
No. 65949), a polyurethane elastic yarn is used as a core yarn, and the periphery thereof is a single fiber fineness of 1.5 d (1.7 dtex).
Hereinafter, a false twist coated elastic yarn in which a polyamide multifilament false twist yarn having a total fineness of 50 to 70 d (56 to 78 dtex) and a number of filaments of 40 to 68 is coated as a sheath yarn is proposed. When this false twist-coated elastic yarn is used in pantyhose, tights, socks, innerwear, stretch fabrics, etc., it has been possible to give the knitted fabric a soft texture and a moderate fit, but in recent years the taste of consumers has been increasing. With the diversification and high-quality products, tights, body shirts and stretch fabrics having a higher softness are strongly demanded.

As a countermeasure for obtaining a knitted woven fabric capable of providing such a high degree of softness and stretchability, a single fiber fineness of a polyamide multifilament false twist yarn of a sheath portion is set to 1.5 d (1.7 dtex) as in the prior art. If the thickness is further reduced or the number of filaments is set to more than 68, coating failure is likely to occur. Cause a problem.

Japanese Patent Application Laid-Open No. 62-57959 discloses a knitted woven fabric using a false-twisted coated elastic yarn in which a polyurethane elastic yarn and a polyamide false-twist yarn are aligned, air-twisted and false-twisted, and then entangled. Proposed. However, the knitted fabric has a problem that coverage is low and tends to be non-uniform, the surface state of the knitted fabric is easily disturbed, and "opening" is likely to occur.

[0005] The term "blind" refers to a state in which when a product such as tights or pants is worn and the knee is strongly bent, if the covering property is poor, the lightly dyed polyurethane yarn looks white through the gap between the sheath yarns.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the "peeling", "cut core" or "knitted surface" in a knitted fabric by reducing the degree of shrinkage of a sheath portion without causing coating defects. It is another object of the present invention to provide a stretched composite coated elastic yarn, a method of manufacturing the composite coated elastic yarn, and a knitted fabric, which can obtain a high degree of softness, gloss, or ease of dyeing by the fiber yarn to be wound.

[0007]

According to the present invention, there is provided a composite-coated elastic yarn according to the present invention, wherein a multifilament false-twisted sheath yarn is coated substantially non-twisted around a core yarn. Characterized in that a long fiber yarn or a short fiber yarn is wound around the outer periphery of the wire at a winding frequency of 100 to 2000 T / m.

In the method for producing a composite coated elastic yarn of the present invention, a drafted elastic yarn and a false twisted crimped yarn which has been subjected to a false twisting process are drawn together, and then kneaded-heat-fixed-drained. It is characterized in that false twisting is performed, and then a long fiber yarn or a short fiber yarn is wound around the outer periphery.

Furthermore, the knitted woven fabric of the present invention is characterized in that a multifilament false twisted yarn of a sheath yarn is coated in a substantially non-twisted manner around a core yarn elastic yarn, and further a long fiber yarn or Short fiber yarn is wound 100 to 2000T
/ M is a composite coated elastic yarn wound at 10% by weight.
It is characterized by including the above.

In this way, the elastic yarn of the core yarn and the false-twisted thermoplastic synthetic fiber multifilament pre-twisted twisted yarn of the sheath yarn are aligned and bundled to obtain a heat-fixed heat-releasing yarn. The inner core yarn is exposed to the outside of the sheath yarn due to the double coating structure in which a long fiber yarn or a short fiber yarn is wound around the false twist coated elastic yarn by real twist. It is less likely to be "blown" or cut out of the core.
In addition, by appropriately selecting the characteristics of the long fiber yarn or short fiber yarn wound around the outside, the knitted fabric using this composite coated elastic yarn can have a high soft texture, soft spun like, gloss, high moisture absorption and water absorption. New texture and functionality such as color development can be imparted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the yarn structure of a composite coated elastic yarn of the present invention, a main part is composed of a false twist coated elastic yarn, and the false twist coated elastic yarn is made of an elastic yarn as a core yarn, and a sheath side of the false twist coated elastic yarn. A multi-filament false twisted yarn having a fine shrink that has been subjected to false twisting is twisted and inverted as a sheath yarn to cover substantially non-twisted coating. Then, the fiber yarn is further wound around the outer layer of the false twist-coated elastic yarn by real twist, so that the innermost layer portion has an elastic yarn, the intermediate layer portion has a false twist yarn, and the outermost layer portion has a three-layer structure of a fiber yarn. It is formed and double coated.

First, the elastic yarn used for the core yarn is not particularly limited, but for example, a polyurethane elastic yarn, a polyether elastic yarn and the like are preferably used.

[0013] The multifilament false twist yarn used for the sheath yarn is not particularly limited as long as it is a synthetic fiber that can be false twisted. For example, a polyamide multifilament, a polyester multifilament, a polypropylene terephthalate multifilament or the like, or a false twisted yarn composed of a multifilament having a bimetal structure thereof is preferably used.

The type of long fiber yarn or short fiber yarn used for the outer layer of the false twist coated elastic yarn is not particularly limited, but a new feeling and function can be imparted by selecting the yarn type. , It is preferable to select in consideration of these newly added factors.

[0015] In the case of the filament yarn to be wound, in the case of long fiber yarn, polyamide filament processed yarn, polyester filament processed yarn, silk yarn, acetate yarn,
Rayon yarn and the like can be mentioned. Polyamide and polyester filament yarns can give softness and "smoothness" to silk fabrics, gloss, moisture absorption, and suppleness to silk yarns, and acetate and rayon yarns to color and dryness. it can.

In the case of short fiber yarns, cotton, acetate spun yarn, rayon spun yarn, wool, and the like can be mentioned. Cotton has a hygroscopic property and a soft feeling, and acetate and rayon have a coloring property and a dry feeling. The wrinkle can give a knitted fabric a firmness, a waist, and heat retention with wool.

FIGS. 1 and 2 are a side view and a cross-sectional view of a composite coated elastic yarn of the present invention.

FIG. 1 shows an arrangement in which a false twist-coated elastic yarn Y is disposed at the center of a composite coated elastic yarn Z of the present invention, and a wound yarn X composed of a long fiber yarn or a short fiber yarn is formed by a real twist. FIG. 2 is a cross-sectional view taken along a line A1-A of FIG.
3 is a model diagram showing each of the three-layer states of the cross-sectional layers in FIG.

The composite coated elastic yarn of the present invention has a thickness of 100 to 200.
It has a real twist of 0 T / m. The actual number of twists varies depending on the thickness of the composite coated elastic yarn, but the total constituent fineness is 50 dte.
In the vicinity of x, 700 to 2000 T / m is 100 dtex.
The preferable range is 300 to 1000 T / m in the vicinity, and 100 to 700 T / m in the range of 150 dtex or more.
Of course, it may be out of this range depending on the use or organization.

In general, when the number of twists is increased, the coatability is particularly improved, and a firm knitted fabric is formed. However, the texture is hardened and the twist torque is increased.

The direction of the actual twisting depends on the composite false twisting process and the residual torque direction of the false twisted crimped yarn used for the sheath yarn. In the opposite direction, the convergence is high and the “woven surface” is beautiful and has a “smooth” feeling, so it may be selected as appropriate according to the application.

The weight of the composite coated elastic yarn used in the stretch knitted fabric of the present invention is preferably at least 10% by weight based on the weight of the entire knitted fabric.

First, in circular knitted goods such as tights, body shirts, athletic wear, and swimwear, 100% use is preferred in applications where fit is important, and jacquard knitted fabrics and cloths in which a slight stretchability such as sweaters and cardigans are functionally comfortable are used. For knitted fabrics, it is preferable to use 10 to 30%.

In woven fabrics such as pants, jeans, sportswear, blousons, and the like, there are uses such as only warp yarns or weft yarns, or both warp and weft yarns. If the stretch is only in the horizontal direction, the weight ratio is preferably 30 to 50% based on the total weight of the fabric, and if the stretch is only in the vertical direction, the weight ratio is preferably 50 to 70%.

Further, it can be used as a stripe-like woven fabric or alternate woven fabric such as every other line or every other line, and the weight ratio is preferably 10% to 40%.

It is most preferable to use the composite-coated elastic yarn of the present invention in a knitted fabric only in an amount necessary for a required function and hand.

In the stretch properties of the stretch knitted fabric of the present invention, the stretch ratio is 50 to 200%. The preferred range is 70 to 200% for knitted fabrics, and the preferred range is 50 to 150% for woven fabrics, depending on the yarn configuration and texture. In general, the coarser the tissue, the higher the stretch / elongation ratio, but the thickness of the cloth becomes thin, which is not practical.

On the other hand, the stretch / stretch recovery rate is 60 to 95%, but if it is 60% or less, the recovery rate is low and not practical, and the preferred range is 80% or more.

The measurement of the stretch rate and the stretch rate recovery rate are in accordance with JIS L-1096 General Textile Test Method.

Next, the method for producing the composite coated elastic yarn of the present invention will be described in detail. First, a method for producing a false twist coated elastic yarn constituting the core of the composite coated elastic yarn will be described.

FIG. 3 exemplifies a production process of the false twist-coated elastic yarn of the present invention. The elastic yarn 2 is drafted between the rolling rollers 1 and 1 ′ and the supply roller 5. On the other hand, the false twisted twisted yarn 3 preliminarily twisted and the drafted elastic yarn 2 are aligned, bundled by a guide 4 and supplied to a supply roller 5.

While the speed of the take-off roller 8 is higher than that of the supply roller 5, heating is performed by the friction type false twisting device 7, heat setting is performed by the heater 6, and after cooling, the frictional false twist is performed by the friction false twisting device 7. Then, the false twist-coated elastic yarn is once manufactured.

Before winding by the winding roller 11, air mixing treatment may be performed between the take-up roller 8 and the relaxation roller 10 by the entanglement nozzle 9 for the purpose of improving the coating property and the post-process passability. After that, it is wound around the cheese 12.

Here, the multifilament false twisted creped yarn 3 as the raw yarn for the sheath portion of the false twisted coated elastic yarn is a ken crimped yarn that has been subjected to a false twisting process in advance, and is an S-knitted yarn or a Z twisted yarn. Any of the knitting yarns is used.

When the direction of the twist of the multifilament false twisted yarn 3 is the same as the direction of the false twist coated elastic yarn, the coatability of the false twist coated elastic yarn is improved and the bunching property is high. It becomes sheer. On the other hand, if the twisting direction of the false-twisted elastic yarn is opposite to that of the multifilament false-twisted crimped yarn 3, the openability of the composite false-twisted coated elastic yarn is increased, the texture becomes soft, and the volume feeling is reduced. Come out.

Therefore, it is preferable to use the combination in the twisting direction properly according to the use of the product.

The elastic yarn 2 drafted in this way and the multifilament false-twisted crimped yarn 3 unwound from the bobbin are aligned in a core-sheath shape in the twining guide 4.
In this case, the core-side elastic yarn 2 and the single-filament filament-shrink group of the sheath-side multifilament false-twisted shrink yarn 3 are formed into a core-sheath shape so as to be tangled inward from the supply roller 5 to form a composite false-twisted yarn. to go into.

The two yarns aligned in a core-sheath shape are false-twisted by a friction false twisting tool 7 (twister) while traveling between the supply roller 5 and the take-up roller 8, but the heater temperature has already been increased. Since the multifilament yarn serving as the sheath has been subjected to the heat treatment of false twisting, it is difficult to receive heat setting in the processing of the composite false twist coated elastic yarn, but the entanglement with the core yarn is large, so the covering property is improves.

Accordingly, as in the prior art, the coating process is performed by fusing the sheath yarn to the core yarn or making the sheath yarn bite into the core yarn in order to improve the covering property, as in the prior art. However, the present invention is not a technique of fusing or biting, but a new technique of coating after a false twisting process using a residual torque previously provided in a sheath yarn.

In the relationship between the temperature of the false twisting applied to the sheath yarn in advance and the temperature of the false twisting, a combination in which the false twist coating temperature is generally higher than the false twisting temperature of the sheath yarn is generally used. It is preferable from the viewpoint of forming the twist-coated elastic yarn. However, on the other hand, even if it is low, it can be covered by entanglement treatment or twisting, so it is a preferable combination in the field where a soft texture is required.

As a specific combination of the temperatures, the temperature of the false twisting applied to the sheath yarn in advance can be applied in a wide range from the glass transition point or higher to the softening point of the multifilament yarn. From the relationship with the temperature, the temperature of the false twisting applied to the sheath yarn in advance is preferably lower than the temperature of the subsequent false twist coating by 10 to 20 ° C. or more.

Further, in the present invention, a long fiber or a short fiber is wound around the false twist-coated elastic yarn once obtained, and this winding method may be any of a twisting method and a covering method.

As described above, the number of times of winding is in the range of 100 to 2000 T / m, and is appropriately set according to the purpose and application, and then wound.

The composite coated elastic yarn of the present invention is a core elastic yarn,
It is a composite-coated elastic yarn composed of a three-layer structure yarn of a false twisted sheath yarn of a sheath yarn and a yarn wound by a fiber yarn of the outermost layer.

The composite coated elastic yarn is used for weaving by using the warp yarn or weft yarn of the woven fabric, or both the warp yarn and weft yarn. They are also knitted similarly.

In the dyeing finishing process, a three-component mixed yarn using three types of fibers is used. In particular, for the use of the dye, the dyeing temperature or the setting temperature, and the alkali weight reduction process, the most suitable selection for each material is made. It needs to be processed.

Specific applications of the stretch knitted fabric of the present invention include general sportswear such as golf, tennis and ski wear, stretch pants, jeans, casual wear, blouson and the like for textiles, tights, socks, body shirts and the like for knitted fabrics. Swimwear, athletic wear,
It can be widely and suitably used for underwear such as supporters, innerwear, T-shirts, awning supporters, and medical devices such as bandages, corsets, and plaster replacement sheets.

[0048]

EXAMPLE 1 A polyurethane elastic yarn having a fineness of 22 dtex was pre-drafted 2.5 times, false twist coated draft 1.16 times, and total draft 2.9 times, and used as the core raw yarn.
A nylon 6 multifilament false twisted twisted yarn having a fineness of 56 dtex and 40 filaments, which has been false twisted at a temperature of 0 ° C., is used as the sheath yarn, and both yarns are aligned to obtain a D / Y ratio of 2.
7. Yarn processing speed 200m / min, number of false twists 3800T /
m, at a set temperature of 175 ° C., and then subjected to an air entanglement treatment of 0.039MP (0.4 kg / Cm ^{2) with} an entanglement nozzle to obtain a false twist-coated elastic yarn.

The yarn properties of the obtained false twist-coated elastic yarn are fineness of 6
4.1 dtex, strength 4.1 cN / dT, elongation 31.6
% And the elasticity recovery ratio was 55.1%. In addition, the fineness, the high elongation, and the expansion / contraction restoration rate were measured according to JIS method L-1090.

Further, this false twist-coated elastic yarn and 77 dtex
Polyamide false twisted yarns are aligned and twisted in the same direction as the untwisting direction of false twist coating at a twist number of 405 T / m to produce a three-layer composite coated elastic yarn having a double coating. did.

As the warp yarn, a false twisted yarn of 78 dtex24 filament of nylon 6 was used, and as the weft yarn, the composite coated elastic yarn of the present invention was woven into a plain woven fabric at a density of 85 × 88 (lines / inch). As a result of dyeing and finishing the greige machine, the weight ratio of the composite coated elastic yarn in the woven fabric was 43%,
78% expansion and contraction in the horizontal direction, 8 recovery in expansion and contraction
A 9% stretch fabric for athletic use was obtained.

Example 2 A 24 dtex silk yarn was wound around the 64.1 dtex false twist coated elastic yarn obtained in Example 1 at a twisting rate of 512 T / m to produce a composite coated elastic yarn having a three-layer structure. The composite coated elastic yarn was knitted in an interlock with a 24G circular knitting machine.
The greige fabric was dyed at normal pressure, and the stretch characteristics were measured. As a result, a stretch knitted fabric for a body shirt having a stretch rate in the vertical direction of 156%, a stretch rate recovery rate of 94%, and a weight ratio of 100% was obtained.

In the wearing test of the above-mentioned body shirt, the "peeling" of the knitted fabric which has a soft feeling without a feeling of tightening and which is likely to occur when the elbow is bent is inconspicuous, has a clear stitch and a beautiful appearance, and has a high quality feeling. There was a product.

[0054]

As described above, according to the stretch knitted fabric of the present invention, the sheath yarn is coated on the core yarn while twisting and reversing, and further, the outer layer has a double coating in which the fiber yarn is wound. Because it is composed of a three-layered coated elastic yarn, its covering property is high. Especially when the knee, buttocks and elbows are bent, the core yarn appears pale in color, and "whiteness" or "skinning" may not occur at all. There is no.

Depending on the characteristics of the fiber yarn wound around the outermost layer, it is possible to impart various functionalities and effects such as glossiness, soft feeling, coloring and moisture absorption.

Since the sheath yarn has been subjected to false twisting twice,
Since it has ultrafine sagging, it has a soft texture already in the false twist coated elastic yarn, but a more advanced soft texture can be imparted to the fiber yarn to be further wound.

In the knitted fabric, the actual twist is applied to the outer layer.
The stitch becomes clearer, and the quality of the "knitted surface" is improved.

Further, since the sheath yarn of the false-twisted coated elastic yarn located at the core of the composite-coated elastic yarn of the present invention does not fuse or bite into the core yarn, the core yarn and the sheath yarn slip. As a result, smooth elongation at the time of stretching and smooth restoring force at the time of backing can be obtained, so that a product having excellent fit can be obtained.

[Brief description of the drawings]

FIG. 1 is a side model diagram showing an example of a composite coated elastic yarn used for a stretch knitted fabric of the present invention.

FIG. 2 is a cross-sectional model diagram showing an example of an A1-A2 cut surface of the composite coated elastic yarn used for the stretch knitted fabric of the present invention.

FIG. 3 is a process chart showing an example of a method for producing a false twist-coated elastic yarn used in the stretch knitted fabric of the present invention.

[Explanation of symbols]

 1, 1 ': rolling roller 2: polyurethane elastic yarn 3: multifilament false twisted crimped yarn 4: convergence guide 5: supply roller 6: heater 7: friction false twisting tool (twister) 8: take-up roller 9: entangled nozzle 10: Relaxing roller 11: Winding roller 12: Cheese Z: Composite coated elastic yarn X: Wound fiber yarn Y: False twist coated elastic yarn y1: Sheath yarn Y2: Core yarn (elastic yarn)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D04B 1/18 D04B 1/18 21/00 21/00 B (72) Inventor Yoshiyuki Miki God of Toyooka-shi, Hyogo 157-32 Midai Inside Shinko Kogyo Co., Ltd. (72) Inventor Kei Inoue 1-7-13-1 Otemae, Chuo-ku, Osaka City, Osaka Prefecture F-term (reference) 4G002 AA04 AA05 AA06 AB02 AB04 AC01 BB00 BB01 DA04 EA00 EA06 FA03 4L036 MA04 MA06 MA33 MA35 MA39 PA05 PA42 PA46 PA47 RA04 RA24 RA25 4L048 AA24 AA26 AA51 AB08 AB17 AB19 AB21 AC12 CA04 DA03

Claims (3)

[Claims] The present invention relates to a false-twisted coated elastic yarn in which a multifilament false-twisted sheath yarn is coated in a substantially non-twisted manner around an elastic yarn of a core yarn. A composite-coated elastic yarn, which is wound at 2,000 T / m. 2. The method of claim 1, wherein the drafted elastic yarn and a false twisted twisted yarn preliminarily subjected to false twisting are aligned, and then subjected to false twisting of heat-fixing-draining, and then to a long fiber yarn or A method for producing a composite coated elastic yarn, characterized by winding a short fiber yarn around the outer periphery. 3. A filament containing a multifilament false-twisted sheath yarn, which is substantially twisted around the elastic yarn of a core yarn, is further wound with a long fiber yarn or a short fiber yarn by 100 times. A knitted woven fabric, wherein the composite coated elastic yarn wound at 2,000 T / m contains 10% or more by weight.