JP2002339182A - Double covering elastic yarn and stockings using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide double covering elastic yarn excellent in antistatic property, appearance of fabric, touch feeling and bulkiness and stockings using the yarn. SOLUTION: This double covering elastic yarn is obtained by using an elastic fiber as a core yarn and successively winding lower winding yarn for covering and upper winding yarn for covering each composed of a thermoplastic resin around the core yarn. The double covering elastic yarn is characterized in that the lower winding yarn for covering contains electroconductive inorganic powder and has <=17 decitex yarn fineness and comprises filaments having 1-15 filament numbers and the upper winding yarn for covering is crimped yarn of filaments having <=2.0 decitex single fiber fineness and the upper winding yarn for covering and the lower winding yarn are wound in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering elastic yarn having excellent antistatic properties. In particular, the present invention relates to a double covering elastic yarn having antistatic properties, softness, and fabric appearance, which is useful as a stocking material for socks.

[0002]

2. Description of the Related Art When wearing stockings, skirts, pants and slips, static electricity is charged by friction,
A phenomenon occurs in which clothes cling to the feet. Therefore, in order to prevent this clinging, a method of knitting using an antistatic long fiber containing a conductive polymer compound and a method of dyeing and finishing by Kazuo Shiozawa, Jinjinshokan, 1991
Post-processing methods of treating with a treatment agent that imparts antistatic properties after stocking knitting as described in these publications, these methods are known, without impairing high elongation, fabric appearance, color, etc. Although some antistatic properties can be imparted to the stockings, practically satisfactory antistatic effects were not obtained in a low humidity environment such as a humidity of 40% RH or less. In addition, when post-processing is performed using an antistatic component, there is a problem that the antistatic component drops off when washing is repeated, and the antistatic effect is greatly reduced.

In order to solve this problem, Japanese Patent Laid-Open No. 11-2
No. 79881 proposes a double covering elastic yarn using an antistatic filament yarn containing a conductive inorganic powder (hereinafter referred to as an antistatic yarn). It has also been proposed to use the fibers to produce stockings.

[0004] Shintoku Salvation, Kinari Toshiyasu, Journal of the Textile Machinery Society, Vo
l.42, No.5, pp. 239-245 (1989) "Characteristics and manufacture of covered yarn", Motoichi Yoshimura, Nobuo Iwaki, Salutoku Shintaku, Journal of the Textile Machinery Society Vol.28, No.8, pp.475-466 ( 1975) As described in "Basic Problems of Covered Yarn" and the like, generally, double covering elastic yarn is generated by winding a lower winding yarn wound inside the core yarn and an upper winding yarn wound outside the core yarn. The winding directions are opposite to each other because the crimping torque cancels out.

[0005] For this reason, stockings using such conventionally known double covering elastic yarns are such that crimping torque is negated, bulkiness is reduced, and feel is worse than stockings using single covering elastic yarns. There was a problem.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a double covering elastic yarn and a stocking which improves the above-mentioned drawbacks of the prior art and improves antistatic properties, fabric appearance and feel. .

[0007]

Means for Solving the Problems In order to solve the above problems, the antistatic double covering elastic yarn of the present invention has the following constitution. That is, a double covering elastic yarn in which an elastic fiber is used as a core yarn, and a lower winding yarn for covering made of a thermoplastic resin and an upper winding yarn for covering are sequentially wound around the core yarn, and the lower winding yarn for covering is made of a conductive inorganic powder. And, the yarn fineness is 17 decitex or less, the filament number is 1 to 15 long fibers, the upper winding yarn for covering is a crimped yarn of a long fiber with a single yarn fiber fineness of 2.0 decitex or less, The upper winding yarn for covering and the lower winding yarn for covering are wound in the same direction, and are double covering elastic yarns.

The stocking of the present invention is a stocking in which such a double covering elastic yarn is knitted at least in a part of a leg portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the double covering elastic yarn of the present invention, the lower winding yarn for covering contains a conductive inorganic powder. If the conductive inorganic powder is not contained, the antistatic property of the stocking becomes insufficient.

As the conductive inorganic powder, for example, conductive carbon black, metal powder such as copper, or conductive metal compound such as zinc oxide is preferably used.

The content is not particularly limited as long as the antistatic property of the yarn is exhibited, and can be appropriately selected according to the conductivity, but is about 5 to 15% by weight.

[0012] As a mode of inclusion, a composite fiber in which such a conductive inorganic powder is partially localized in a fiber at a high concentration is preferable. Examples of such a conjugate fiber include a core-in-sheath conjugate fiber having one conductive layer dispersedly containing a conductive inorganic powder and a bonded conjugate fiber. The material polymer of the fiber containing the conductive inorganic powder is polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66)
Ordinary polyamides such as polyester are preferable, and polymers such as polyester and polyethylene may be used.

The upper winding yarn for covering is preferably produced by a melt spinning method which is a usual spinning method. The spinning method is melt spinning, cooling, oiling,
A spinning speed of 1
After spinning at a speed of 2,000 m / min or more, and then drawing and winding without winding once, or spinning at a high speed of 3000 m / min or more and spinning without stretching, spinning is performed, and then false twisting. A crimp can be imparted by a known method such as a rubbing method or a knit deknit method. Materials include polyamide, polyester, polyolefin,
Polyacrylic or the like is used, but it is preferable to use polyamide filaments excellent in dyeing characteristics, mechanical strength, friction resistance, and the like. Further, nylon 6 fibers and nylon 66 which are superior in these characteristics among polyamide filaments are also used. Preferably, fibers are used.

The elastic fibers constituting the core yarn of the double covering elastic yarn of the present invention include polyurethane elastic fibers, polyamide elastomer elastic fibers, polyester elastomer elastic fibers, natural rubber fibers, synthetic rubber fibers, butadiene fibers. Among them, polyurethane-based elastic fibers and polyamide-based elastomeric elastic fibers are preferred for stocking in view of their elastic properties, thermal properties, durability and the like.

The double covering elastic yarn of the present invention has a yarn fineness of 17 dtex or less, preferably 12 dtex or less, of the lower winding yarn for covering. If the yarn fineness exceeds 17 decitex, the feel of stocking becomes rough and hard. Further, the fibers containing the conductive inorganic powder are conspicuous, and the appearance of the fabric is also deteriorated. The lower limit is not particularly limited as long as no problem occurs in the covering step or the knitting step, and is usually about 7 to 12 dtex.

The number of filaments of the lower winding yarn for covering is 1 to 15, preferably 3 to 7 filaments. When the number of filaments exceeds 10, there are problems such as lack of stability in yarn production, reduction in raw yarn strength, and lack of high-order workability such as yarn breakage during covering.

On the other hand, the upper winding yarn for covering used in the present invention is a crimped yarn of a long fiber having a single-fiber fineness of 2.0 dtex or less, preferably 1.5 dtex or less.

If the single-fiber fineness exceeds 2.0 decitex, the feel of the stocking becomes rough and rough. In addition, if the upper winding yarn for covering is not a crimped yarn, it does not have bulkiness and has a rough and hard feel when used as a stocking. In addition, there is a problem that the covering property is deteriorated and the design of the fiber itself or the woven or knitted material is deteriorated.
There is no particular limitation as long as no problems occur in the covering step and the knitting step, and a range of 1.0 to 1.4 decitex is preferable.

In order to obtain a crimped yarn, known crimping methods such as false twisting, abrasion, and knit denitration can be employed.

In the elastic yarn for double covering of the present invention, the upper winding yarn for covering and the lower winding yarn for covering are wound in the same direction. If the winding directions of the upper winding yarn and the lower winding yarn are not the same, the crimp torque generated by the winding is negated, the bulkiness is reduced, and the touch is reduced.

The upper winding yarn for covering used in the present invention preferably satisfies the following expression (1).

500 × √ (50 / D1) ≦ Y1 ≦ 900 × √ (50 / D1) (1) D1: Yarn fineness of covering upper winding yarn (dtex) Y1: Number of windings of covering upper winding yarn (t / m) Y1 Is less than 500 × √ (50 / D1), the covering covering property is deteriorated, and the appearance of the fabric when stocking is performed is deteriorated. On the other hand, when Y1 exceeds 900 × ／ (50 / D1), the crimping property of the covering elastic yarn is reduced, and the feel when stocking is performed is deteriorated.

The lower winding yarn for covering used in the present invention preferably satisfies the following expression (2).

1500 × √ (10 / D2) ≦ Y2 ≦ 2000 × √ (10 / D2) (2) D2: yarn fineness of covering lower winding yarn (dtex) Y2: winding number of covering lower winding yarn (t / m) Y2 Is less than 1500 × √ (10 / D2), the lower thread floats without sufficiently covering the spandex,
The touch and fabric appearance when stocking is deteriorated. On the other hand, when Y2 exceeds 2000 × ２ (10 / D2), the crimping of the covering elastic yarn is reduced, and the feel when stocking is performed is deteriorated.

The stocking of the present invention uses the double covering elastic yarn of the present invention for at least a part of the leg portion.

The leg knitted fabric using the double covering elastic yarn of the present invention uses a knitting machine having two or four yarns.
Can be knitted.

As a knitting method, a double-covering elastic yarn (hereinafter referred to as S, S same-direction DC) in which the winding direction of the upper winding yarn for covering is S and the winding direction of the lower winding yarn for covering is S.
Y) and a double covering elastic yarn (hereinafter referred to as Z, Z same direction DCY) in which the winding direction of the upper winding yarn for covering is Z and the winding direction of the lower winding yarn for covering is Z, and knitted alternately. Is preferred. When knitting is performed using only one of the double covering yarns, the knitted fabric is twisted when stocking is performed, and the appearance is deteriorated.

The stockings of the present invention include, for example, stocking products represented by pantyhose, tights, long stockings, and short stockings.

[0029]

EXAMPLES The leg portion of the stocking product was evaluated according to the following method.

Touch: The stocking product was put on a human foot, and the soft feeling was evaluated relatively by the touch feeling of the examiner (five) according to the following criteria. ◎: extremely good ○: good △: slightly poor ×: bad

Dough appearance: The uniformity of the dough was relatively evaluated by the eyes of five inspectors based on the following criteria. ◎: extremely good ○: good △: slightly poor ×: bad

Friction charge voltage: Measured by a JIS L 1094 rotary static tester method. At this time,
A polyethylene terephthalate cloth was used as the rubbing cloth, and the environmental conditions were 20 ° C. and 40% RH.

Antistatic property (ash test): After knitting the knitted fabric of the leg portion 10 times with a cloth made of polyethylene terephthalate, immediately, the surface of the knitted fabric is uniformly coated with 1.5 g of tobacco ash in a 10 cm square. Close to 1 cm from the bottom of the dispersed container and let stand for 5 seconds. At this time, the state of adhesion of the ash was classified into 5 classes and judged. Grade 5: Almost no ash adhered. Grade 4: Some ash adhesion. Grade 3: There is considerable ash adhesion. Second grade: Those with much ash adhesion. Grade 1: Those with remarkably large ash adhesion.

Clinging: Wearing stocking products and Tetron tricot slips of various hem lengths, 20
Based on the results of three repeated experiments of evaluating the clinging state of the slip after walking for 5 minutes at a speed of 100 steps per minute (about 17 steps / 10 seconds) in a room at 30 ° C. and 30% RH.

Example 1 35% by weight of conductive carbon was used as the lower winding yarn for covering.
Using a conductive polycapramide composition containing and a composition comprising a non-conductive polycapramide, yarn fineness 11 dtex,
5-filament double core-sheath structure (composite ratio of core: sheath = 5:
95) An antistatic nylon 6 fiber was obtained. The specific resistance of the yarn of the fiber was 1.2 × 10 ² Ω · cm. Next, as the upper winding yarn for covering, the yarn fineness is 55 dte.
X, 40 filament nylon 66 fiber was false twisted to obtain a crimped yarn. These yarns are used as a winding yarn for covering, a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn, the draft is set to 3.2 times, and the upper winding yarn is 700 t / m. And 1800 t / m of lower winding yarn to produce S, S same direction DCY and Z, Z same direction DCY. D obtained
Using CY, S, S co-directional DCY and Z, Z are inserted into the yarn feeder of Super 4 knitting machine (400 needles) manufactured by Nagata Seiki Co., Ltd.
DCY was alternately supplied in the same direction, the legs were knitted only with DCY, and dyed, finished, and set with a last in a usual manner to obtain a pantyhose product. As a result of evaluating the leg portion of the obtained pantyhose product, it was found to be excellent in all of friction withstand voltage, antistatic property, cling, fabric appearance, and touch.

Comparative Example 1 As the lower winding yarn for covering, a yarn fineness of 11 dtex, 5
Filament nylon 6 fibers were used. A crimped yarn obtained by subjecting a nylon 66 fiber having a yarn fineness of 55 dtex and 40 filaments to false twisting as the upper winding yarn for covering was used. These yarns are used as covering yarns, and a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn.
The draft is set to 3.2 times, and the upper winding 700t / m and the lower winding 1800t / m are wound in the same direction.
Y and Z, Z same direction DCY were manufactured. Using the obtained DCY, a Super 4 knitting machine (40 needles) manufactured by Nagata Seiki Co., Ltd.
0), the S, S same direction DCY and Z, Z same direction DCY are alternately fed to the yarn feeder, the legs are knitted only with DCY, and dyeing, finishing and setting of a last are performed by a usual method. Pantyhose products. As a result of evaluating the leg portion of the obtained stocking, it was found that the withstand voltage and antistatic property were low, and the gusset was poor.

Comparative Example 2 As a lower winding yarn for covering, a composition comprising a conductive polycapramide composition containing 35% of conductive carbon and a nonconductive polycapramide was used, and a double core-sheath structure having a yarn fineness of 22 dtex and 5 filaments ( Composite ratio of core: sheath = 5: 9
The antistatic nylon 6 fiber of 5) was used. Further, as the upper winding yarn for covering, a yarn fineness of 55 dtex, 40
A crimped yarn obtained by subjecting a nylon 66 fiber as a filament to false twisting was used. These yarns are used as a winding yarn for covering, a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn, the draft is set to 3.2 times, and the upper winding yarn is 700 t / m.
And 1800 t / m of lower winding yarn to produce S, S same direction DCY and Z, Z same direction DCY. D obtained
Using CY, S, S co-directional DCY and Z, Z are inserted into the yarn feeder of Super 4 knitting machine (400 needles) manufactured by Nagata Seiki Co., Ltd.
DCY was alternately supplied in the same direction, the legs were knitted only with DCY, and dyed, finished, and set with a last in a usual manner to obtain a pantyhose product. As a result of evaluating the leg part of the obtained stocking, the texture was rough and hard, and the soft feeling was inferior, the color of the fiber itself, which is a defect of the antistatic yarn, was bad, and the black dyed knitted fabric became a knitted step-shaped shading, The appearance was poor.

Comparative Example 3 As a lower winding yarn for covering, a composition comprising a conductive polycapramide composition containing 35% of conductive carbon and a nonconductive polycapramide was used, and a double core-sheath structure having a yarn fineness of 22 dtex and 5 filaments ( Composite ratio of core: sheath = 5: 9
The antistatic nylon 6 fiber of 5) was used. Further, as the upper winding yarn for covering, a yarn fineness of 78 dtex, 24
A crimped yarn obtained by subjecting a nylon 66 filament to false twisting was used. These yarns are used as covering yarns, and a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn.
Draft is set to 3.2 times and wound in the same direction with the upper winding 500t / m and the lower winding 1800t / m.
Y and Z, Z same direction DCY were manufactured. Using the obtained DCY, a Super 4 knitting machine (40 needles) manufactured by Nagata Seiki Co., Ltd.
0), the S, S same direction DCY and Z, Z same direction DCY are alternately fed to the yarn feeder, the legs are knitted only with DCY, and dyeing, finishing and setting of a last are performed by a usual method. Pantyhose products. As a result of evaluating the leg portion of the obtained stocking, the feel was rough and the softness was inferior.

Comparative Example 4 As a lower winding yarn for covering, a composition comprising a conductive polycapramide composition containing 35% of conductive carbon and a non-conductive polycapramide was used, and a double core-sheath structure having a yarn fineness of 22 dtex and 5 filaments ( Composite ratio of core: sheath = 5: 9
The antistatic nylon 6 fiber of 5) was used. Further, as the upper winding yarn for covering, a yarn fineness of 55 dtex, 40
A crimped yarn obtained by subjecting a nylon 66 fiber as a filament to false twisting was used. These yarns are used as a winding yarn for covering, a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn, the draft is set to 3.2 times, and the upper winding yarn is 700 t / m.
And 1800 t / m of lower winding yarn to produce S, S same direction DCY and Z, Z same direction DCY. D obtained
Using CY, S, S co-directional DCY and Z, Z are inserted into the yarn feeder of Super 4 knitting machine (400 needles) manufactured by Nagata Seiki Co., Ltd.
DCY was alternately supplied in the same direction, the legs were knitted only with DCY, and dyed, finished, and set with a last in a usual manner to obtain a pantyhose product. As a result of evaluating the leg portion of the obtained stocking, it was found that the stocking had no bulkiness, had a rough feel, and had a poor soft feeling. Further, the color of the fiber itself, which is a defect of the antistatic yarn, was poor, and the knitted fabric dyed in black had a knitted step-like difference in shading, resulting in poor fabric appearance.

Comparative Example 5 As the lower winding yarn for covering, a composition comprising a conductive polycapramide composition containing 35% of conductive carbon and a non-conductive polycapramide was used, and a double core-sheath structure having a yarn fineness of 22 dtex and 5 filaments ( Composite ratio of core: sheath = 5: 9
The antistatic nylon 6 fiber of 5) was used. Further, as the upper winding yarn for covering, a yarn fineness of 78 dtex, 24
A crimped yarn obtained by subjecting a nylon 66 fiber as a filament to false twisting was used. These yarns are used as a winding yarn for covering, and a polyurethane elastic yarn having a yarn fineness of 17 dtex (Spandex, manufactured by Dupont Toray Co., Ltd.) is used as a core yarn, the draft is set to 3.2 times, and the upper winding yarn is set in the S direction. 70
DCT was manufactured by winding at 0 t / m and the lower winding at 1800 t / m in the Z direction in different directions. Using the obtained DCY,
Super 4 knitting machine manufactured by Nagata Seiki Co., Ltd. (400 needles)
DCY was supplied to the yarn feeder, and the leg portion was knitted only with DCY, and dyed, finished, and set with a last in a usual manner to obtain a pantyhose product. As a result of evaluating the leg portion of the obtained stocking, it was inferior in bulkiness and rough in texture and inferior in soft feeling. Also, the fabric appearance was poor.

[0041]

[Table 1]

[0042]

According to the double covering elastic yarn of the present invention,
By using an antistatic yarn as the lower winding yarn for covering and a crimped yarn having a single yarn fineness of 2.0 dtex or less as the upper winding yarn, the upper winding yarn and the lower winding yarn are covered in the same direction. Yarn can be obtained. further,
In the case of hosiery such as stockings, socks having excellent antistatic properties and antistatic washing durability can be obtained, and overall excellent socks with excellent touch and fabric appearance can be obtained.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B018 AB02 AC01 AD02 4L036 MA04 MA06 MA33 MA39 PA21 PA47 RA25 UA06 UA25 UA30

Claims (3)

[Claims] 1. A double covering elastic yarn in which an elastic fiber is used as a core yarn, and a lower winding yarn for covering made of a thermoplastic resin and an upper winding yarn for covering are sequentially wound around the core yarn, wherein the lower winding yarn for covering is conductive. Yarn fineness of 17 decitex or less containing conductive inorganic powder, 1 filament
~ 15 long fibers, the upper winding yarn for covering is a crimped yarn of a long fiber having a single fiber fineness of 2.0 dtex or less, and the upper winding yarn for covering and the lower winding yarn for covering are in the same direction. Double covering elastic yarn that is wound. 2. The elastic yarn for double covering according to claim 1, wherein the upper winding yarn for covering satisfies the following formula (1), and the lower winding yarn for covering satisfies the following formula (2). 500 × √ (50 / D1) ≦ Y1 ≦ 900 × √ (50 / D1) (1) D1: Yarn fineness of covering upper winding yarn (dtex) Y1: Number of windings of covering upper winding yarn (t / m) 1500 × √ ( 10 / D2) ≦ Y2 ≦ 2000 × √ (10 / D2) (2) D2: Yarn fineness of covering lower winding yarn (dtex) Y2: Number of winding lower covering yarn (t / m) 3. A stocking in which the double covering elastic yarn according to claim 1 or 2 is knitted at least in a part of a leg portion.