JPH08158106A - Panty hose and its production - Google Patents

Abstract

PURPOSE: To obtain a panty hose free from coarseness (ring uneven or color shade), having uniform appearance, excellent in aesthetic property and fitness in high yield. CONSTITUTION: This panty hose is obtained by using a covering yarn obtained by covering a polyurethane elastic yarn with a polyamide yarn in whole course of at least leg part and standard deviation STσ (g) of stress ST value (g) in 150% elongation of the polyurethane elastomer satisfies the formula 0.03<=STσ<=0.15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panty hose in which a polyurethane elastic yarn covered with a polyamide yarn (covering yarn) is used for at least the entire course of a leg portion, and a method for producing the pantyhose. In detail, the yield is high, and the appearance is uniform with no course unevenness (ring unevenness or light and shade unevenness), so it is excellent in aesthetics.
The present invention also relates to pantyhose having excellent fit and a method for manufacturing the pantyhose.

[0002]

2. Description of the Related Art Conventionally, for women's pantyhose, a real twist torque yarn in which a polyamide filament yarn (for example, a nylon filament yarn) is strongly twisted, or a polyamide filament yarn is false twisted. The processed yarn is used. However, the panty hose obtained by using such a polyamide filament yarn has a weak tightening force, so that when worn for a long time or when it gets wet with water, talumi occurs in the knees or ankles, and the feeling of touch is poor. , And the transparency was insufficient. Therefore, as a panty hose in which such drawbacks are improved, a covered elastic yarn (hereinafter referred to as a covering yarn) obtained by winding the above-mentioned polyamide filament yarn around a polyurethane elastic yarn and the above-mentioned polyamide filament yarn are
Pantyhose, which is alternately knitted book by book (hereinafter referred to as support knitting pantyhose), has rapidly spread and has become popular.

[0003] However, this support interlaced pantyhose has covering yarns and polyamide filament yarns, which are obviously different in physical properties and have excellent stretchability, are alternately arranged. It has the disadvantage that it looks inferior and is inferior in aesthetics.

For this reason, panty hose (hereinafter referred to as "Zocchi pantyhose") using covering yarns has been developed for all courses as a panty hose that eliminates such apparent course unevenness and is more fit. It has appeared in the market.

However, such a Zokki pantyhose has the following problems.

[0006] Conventionally, as is well known, the covering yarn used in the Zoki Pantyhose is a polyurethane elastic yarn covered with a polyamide filament yarn. In this covering step (covering step), the polyurethane elastic yarn is wound at a set draft number while being pulled at a certain draft ratio. In general, polyurethane elastic yarns have a large variation in physical property values (particularly, physical property values showing stretchability) between cheeses or between weights. Therefore, while the polyurethane elastic yarn is being stretched, tension is applied to cover the polyamide filament yarn and the covering yarn is wound up, a slight tension fluctuation strain occurs in the covering yarn, and the covering yarn is obtained. Apparent denier unevenness occurs in the article.

Even if the covering yarn having such apparent denier unevenness is used for the support interlaced pantyhose,
As described above, the support knitting pantyhose has an apparent course unevenness from the beginning as described above. Therefore, in the conventional support knitting pantyhose, the problem of the course unevenness in the final product stage was not particularly noticeable.

However, since the covering yarn is used in the whole course in the Zokki pantyhose, the course unevenness derived from different materials such as the support pantyhose is eliminated, but the Zokki pantyhose has the above-mentioned apparent denier unevenness. Since the covering yarns are lined up, apparent denier unevenness of the covering yarns occurs as new course unevenness (ring unevenness or light and shade unevenness) at the greige stage, and then heat is applied to perform the dyeing process and the finishing process. Coarse unevenness expands and appears.

Therefore, the yield of finished products is 95 to 96% in the support knitted pantyhose, while
The current situation is that Zokichi Pantyhose is significantly less than 90%, which is a major factor in cost pressure.

Therefore, in order to improve the yield, a pantyhose maker for producing Zocchi pantyhose reduces the spindle speed extremely during the covering step to reduce the variation in tension or separate the yarn layers after covering is completed. However, it is not a big improvement despite the increase in the number of processes.

[0011]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned conventional drawbacks, and its object is to:
It is an object of the present invention to provide a pantyhose having a high yield, excellent in aesthetics and excellent in fit because it has a uniform appearance with no course unevenness (ring unevenness or uneven density) and a method for producing the pantyhose.

[0012]

The pantyhose according to the present invention is a pantyhose in which a covering yarn formed by covering polyurethane elastic yarn with a polyamide yarn is used for at least the entire course of a leg portion. The standard deviation STσ (g) of the stress ST value (g) at 150% elongation of the elastic yarn satisfies the following formula, whereby the above object is achieved: 0.03 ≦ STσ ≦ 0.15 (1) .

In a preferred embodiment, the standard deviation STσ (g) of the stress ST value (g) at 150% elongation of the polyurethane elastic yarn satisfies the following expression (2): 0.05 ≦ STσ ≦ 0 10 (2).

The method for producing panty hose according to the present invention comprises: a) Stress S at 200% elongation of polyurethane elastic yarn.
A step of selecting so that the T value (g) satisfies the following equation, b)
Covering a polyamide yarn with the polyurethane elastic yarn to form a covering yarn, and c) knitting the covering yarn at least over the entire course of the leg portion: STx-0.3 ≦ ST ≦ STx + 0.3 (3) Here, STx represents the process average capability value (g) of the stress ST value (g) at 200% elongation of the polyurethane elastic yarn.

In a preferred embodiment, the polyamide yarn is obtained by directly spinning, stretching and winding.

The present invention will be described in detail below.

The polyurethane elastic yarn used in the present invention means a bond of -NHCOO- which is a polyaddition reaction of R-OH and R'-NCO in the polymer, regardless of dry, wet or melt prevention method. An ether-type polymer having an ether bond therein, or a yarn produced from an ester-type polymer having an ester bond therein. The denier of the polyurethane elastic yarn is preferably 40 ^d or less, more preferably 30 ^d or less 1
It is 0 ^d or more. In the case of more than 40 ^d , in the zocchi pantyhose produced using this polyurethane elastic yarn,
Tightening may be too strong and unsuitable. If it is less than 10 ^d , the tightening may be insufficient and slack may occur. The filament of the polyurethane elastic yarn may be a monofilament or a multifilament.

To measure the stress ST value (g) at 200% elongation of the polyurethane elastic yarn, the polyurethane elastic yarn wound around each weight is usually fed at a yarn speed of 20 m / min. Adjust to obtain 200% elongation between the rollers. The stress of the polyurethane elastic yarn at 200% elongation in each weight (nth) is the STn value (g).

In order to measure the STn value of the polyurethane elastic yarn, for example, as shown in FIG. 1, the spandex cheese 10 (nth weight) of the polyurethane elastic yarn 10a is provided on the supply roller 30, and the polyurethane elastic yarn is used. The stretched polyurethane elastic yarn 1 is arranged from the spandex cheese 10 to the suction nozzle 11 via the first delivery roller 31, the second delivery roller 32, and the pinch roller 33.
0a is sent to the collection box 12. At this time, the supply roller 30 and the first delivery roller 31 are stretched by 150%, and the supply roller 30 and the second delivery roller 32 are extended.
And the yarn speed is 20 m / min (the peripheral speed of the second delivery roller 32), the polyurethane elastic yarn 10a is stretched to 200%. Between the first delivery roller 31 and the second delivery roller 32, the sensor parts 20a, 20b, and 20c of the tension pickup 20 are vertically arranged, and the polyurethane elastic yarn 10a is attached to the sensor part 2
It passes through in a state where 0a, 20b, and 20c are in contact with each other. The sensors 20a, 20b, and 20c scan the pressure received from the polyurethane elastic yarn 10a for 60 seconds per second, and the tension pickup 2
0 (for example, H-IIR manufactured by Eiko Sokki Co., Ltd.)
The value is measured. The measured value is processed by a data processor auto reader 22 (for example, Eiko Sokki) via a tension amplifier 21 (for example, HS-3000 made by Eiko Sokki) connected to the tension pickup 20. This average value is the stress STn value at the time of 200% elongation of the polyurethane elastic yarn in the nth weight (spandex cheese 10). The obtained data is printed out by the printer 23 connected to the data processor auto reader 22.

The polyurethane elastic yarn spun in the production process was randomly sampled at a rate of 50 spindles / day for 7 days (350 spindles in total), and all the doffs were measured to average 200% of the polyurethane elastic threads. Stress ST value during elongation (g)
The process average capability value (g) of is referred to as STx value. This STx
The value is calculated by the following equation (4).

[0021]

[Equation 1]

In the present invention, the ST value is the process average capability value (S) of the ST value set by data accumulation.
A polyurethane elastic yarn having a Tx value) within a range of ± 0.3, preferably within a range of ± 0.2 may be used. ±
When it exceeds the range of 0.3, uneven tension appears remarkably in appearance in the obtained Zocchi pantyhose, resulting in poor aesthetics.

As the polyamide yarn for coating the polyurethane elastic yarn, nylon 6, nylon 66, nylon 46, etc. are used and are coated in a single layer or multiple layers. The denier of the polyamide yarn is preferably 20 ^d or less, more preferably 15 ^d or less and 5 ^d or more. 20
If it exceeds ^d , the transparency of the pantyhose obtained may be insufficient, and if it is less than 5 ^d , the strength of the pantyhose obtained may be insufficient. The number of filaments constituting the polyamide yarn is preferably 5 or more in terms of feeling and touch. The upper limit depends on the fluff condition, strength, and denier of the single yarn.

As the polyamide yarn used in the present invention, it is preferable to use a directly spun stretched product, particularly a high speed direct spun stretched product. This is because if the spun yarn is once wound up and then drawn off-line, the fluctuation in tension becomes large. Directly spun and drawn polyamide yarns, compared with normal-drawn pan yarn tailored polyamide yarns, have an inner-middle-outer layer difference of the unraveling tension and ears during unwinding during covering and bobbin winding. ~ Since the difference in the abdomen is small and the material is rolled up in a stable state, the fluctuation in tension during covering can be suppressed.
Therefore, the yield of the pantyhose knitted with the obtained covering yarn is improved. The spinning speed for obtaining the polyamide yarn is 3000 m / min or more, preferably 4000.
From the viewpoint of productivity, it is preferably 5,000 m / min.

To produce the pantyhose of the present invention, first, a covering yarn is obtained by using the above-mentioned polyurethane elastic yarn and polyamide yarn. Pantyhose typically have a leg portion, a panty portion, and a toe portion. The covering yarn used in the ^{leg, 10 d / 1~3 f ~30 d} / 1~3 polyurethane elastic yarn ^{f 5 d / 1~5 f ~15 d} / 1~5 polyamide yarns ^f Is usually used, and the spindle speed is usually 20000 to 300
Covering is performed under the conditions of 00 rpm, twist number of 1400 to 3000 t / m, and draft ratio of 1.5 to 3.5. The covering yarn used for the panty part has 20 ^d / 2 to 2
20 ^f / 1 for polyurethane elastic yarn of 4 ^f- 40 ^d / 2-4 ^f
0~15 ^f ~40 ^d / 10~15 ^f of the polyamide yarn crimped yarn (temporary twist yarn) is use, typically, the spindle rotation speed 50
00-10,000 rpm, twist number 300-600 t / m,
The draft is covered under the condition of 2.0 to 3.5 times. The polyamide yarn used for the toe area has 40 ^d
A crimped yarn (false twist yarn) of / 10 to 20 ^f to 50 ^d / 10 to 20 ^f is used. When the polyamide yarn is wound once, the covering is wound as a single covering yarn on an S-twisted or Z-twisted weight to obtain a lower twist (S) and an upper twist (Z).
When it is wound twice as a double covering thread, 1
It is wound up on the weight.

Then, the covering yarns for the leg portions are alternately arranged with S twist and Z twist in the case of a single covering yarn, and are arranged as they are in the case of a double covering yarn, and a normal knitting machine is used. Using, knitting speed 400 ~ 1
The above covering yarn was arranged on all courses at 000 rpm,
The leg portion of the pantyhose of the present invention is knitted.
Further, the covering yarn, the false twisted yarn of the polyamide yarn, and the like are arranged for the panty portion and the toe portion, and each panty portion and the toe portion are knitted by a usual method. The one knitted in this way is called a raw machine.

In the present invention, it is possible to produce 1200 g of covering yarn convention with one weight (about 400 g) of the polyurethane elastic yarn, and about 1 panty hose.
You can get 200 pairs.

Each part of the pantyhose knitted in this way is usually preset with steam at 80 to 100 ° C., and then toe sewing and panty part sewing are performed by a machine such as a toe closer and a line closer. Form in the shape of panty hose. And, in the obtained pantyhose, 100-120
Dyeing and softening at a temperature of ℃. Then, the panty hose is inserted into the two plate-shaped legs up to the panty portion, and a final set is performed for 5 to 10 seconds with steam at a temperature of 110 to 120 ° C. In this way the final product is obtained.

The standard deviation STσ of the stress ST value (g) at 150% elongation of the polyurethane elastic yarn obtained by unwinding the pantyhose of the present invention obtained as described above.
(G) is 0.03 to 0.15 (n = 20), preferably 0.05 to 0.10. The stress variation is small.

[0030]

EXAMPLES The present invention will be further described below with reference to examples. The evaluation method of course unevenness, the method of measuring the defect rate, and the method of measuring the product yield rate used in the following Examples and Comparative Examples are shown below.

[Course unevenness evaluation method] Ring unevenness: Coarse unevenness due to difference in denier. The obtained panty hose was put on a leg board and visually evaluated, and the number of panty hose in which ring unevenness was recognized was counted.

Light and shade unevenness: It means unevenness of light and shade of the fabric which is considered to be caused by a difference in loop length. The obtained panty hose was put on a leg board and visually evaluated, and the number of panty hose in which light and shade unevenness was recognized was counted. It was

[Defective Rate Measuring Method] The defective rate was calculated by the following formula.

[0034]

[Equation 2]

[Measurement Method of Product Yield Rate] It was calculated by the following formula.

[0036]

(Equation 3)

(Example 1) A polyurethane elastic yarn of 15 ^d / 1 ^f (STx = 3.0, ST = STx ± 0.3) and a yarn of 10 ^d / 5 ^f of a normal drawn yarn of nylon 6 were spindle-mounted. S-twisting and Z-twisting were performed at a rotation speed of 30,000 rpm, a twist number of 1500 t / m, and a draft ratio of 3.0 to obtain covering threads of 20 weights (600 g each). The covering yarn thus obtained is used for the leg portion.

Next, the 4-knitting machine Super 4 manufactured by Nagata Seiki
Using -II, the covering yarn in the leg portion S twist and Z-twist arranged alternately, nylon 6 temporary twist yarn of the polyurethane elastic yarn of 30 ^d / 3 ^f the panty portion 30 ^d / 10 ^f disposing covering single-covering yarn and 30 ^d / 10 ^f nylon 6 temporary twist yarn and alternately, the toe portion 50 ^d
/ 17 ^f nylon 6 false twisted yarn (S, Z twist) was arranged and knitted at a knitting speed of 650 rpm to obtain a pantyhose as a raw machine.

The zocchi pantyhose knitted in this manner was subjected to the sewing, dyeing, and finishing steps according to the above-mentioned conventional method to obtain pantyhose as a product. The STσ was 0.06.

The pantyhose 2000 of the above raw machine
Evaluation of course unevenness (ring unevenness or light and shade unevenness) for 1960 pairs of feet and pantyhose of the product,
The defect rate and the product yield rate were measured.
The results obtained are shown in Table 1. The results of Example 2 and Comparative Example 1 are also shown in Table 1.

Example 2 A panty hose was obtained in the same manner as in Example 1 except that polyurethane elastic yarn of ST = STx ± 0.2 was used as the polyurethane elastic yarn for the leg portion, and after knitting With respect to 2000 pairs of pantyhose and 1980 pairs of pantyhose after the final set, evaluation of course unevenness (ring unevenness or uneven density), measurement of defective rate, and measurement of product yield rate were performed in the same manner as in Example 1. ST
σ was 0.04.

(Comparative Example 1) A panty hose was obtained in the same manner as in Example 1 except that polyurethane elastic yarn of ST = STx ± 0.5 was used as the polyurethane elastic yarn for the leg portion, and after knitting. With respect to 2000 pairs of panty hose and 1900 pairs of panty hose after the final set, evaluation of course unevenness (ring unevenness or uneven density), measurement of defective rate, and measurement of product yield rate were performed in the same manner as in Example 1. ST
σ was 0.17.

[0043]

[Table 1]

As can be seen from Table 1, Examples 1 and 2
The pantyhose of the present invention obtained in the above is compared with the pantyhose of Comparative Example 1 which is a conventional product,
There was little ring unevenness and light and shade unevenness, excellent aesthetics, low defect rate, and final product yield rate of 90% or more, both at the stage of raw material and at the stage of product, and a remarkable effect was obtained. Furthermore, the pantyhose obtained in Example 2 in which the ST value range of the polyurethane elastic yarn is narrow is compared with the pantyhose obtained in Example 1 in which the ST value range is wide. Even in the stage, there was little ring unevenness and light and shade unevenness, the aesthetics was excellent, the defective rate was low, and the final product yield rate was high.

(Example 3) 15 ^d / used in Example 2
Polyurethane elastic yarn adjusted to ST = STx ± 0.2 at 1 ^f was stretched with nylon 6 yarn, which was normally drawn, at spindle rotation speed of 30,000 rpm, Tw / 500, and draft of 3.0 times for S twist and Z twist. Cover each one
A covering thread of 0 weight (600 g each) was obtained. A pantyhose was obtained in the same manner as in Example 1 except that the obtained covering thread was used as a thread for the leg portion. About 1000 pairs of pantyhose as a raw machine and 985 pairs of pantyhose as a product, the same as in Example 1. Then, the course unevenness (ring unevenness or light and shade unevenness) was evaluated, the defective rate was measured, and the product yield rate was measured. STσ was 0.05. Table 2 shows the obtained results.
Shown in The results of Example 4 are also shown in Table 2.

Example 4 Example 3 was repeated except that a high-speed spun nylon 6 yarn directly spun / drawn at a spinning speed of 4000 m / min was used in place of the normally drawn nylon 6 yarn. In the same manner, panty hose was obtained, and about 1000 pairs of raw pantyhose and 995 pairs of product pantyhose, in the same manner as in Example 1, evaluation of course unevenness (ring unevenness or uneven density), measurement of defective rate, and product yield rate. The measurement was performed. STσ
Was 0.08.

[0047]

[Table 2]

As can be seen from Table 2, the pantyhose using the high-speed spun yarn has less unevenness in density, is superior in aesthetics, and has a higher product yield than the pantyhose using the ordinary nylon yarn. It is higher, and it is understood that there is a great effect in improving the yield.

[0049]

According to the present invention, it is possible to provide a panty hose having a high yield, a uniform appearance with no course unevenness (ring unevenness or uneven density) and excellent aesthetics. Further, since the pantyhose of the present invention is the Zokki pantyhose, it has a better fit than the conventional support mixed knit pantyhose.

[Brief description of drawings]

[Fig. 1] Stress ST at 200% elongation of polyurethane elastic yarn
An example of the process of measuring a value is shown.

[Explanation of symbols]

 10 Spandex cheese 10a Polyurethane elastic yarn 11 Suction nozzle 12 Collection box 20 Tension pickup 20a Sensor part 20b Sensor part 20c Sensor part 21 Tension amplifier 22 Data processing machine Auto reader 23 Printer 30 Supply roller 31 First delivery roller 32 Second delivery roller 33 Pinch roller

Claims (4)

[Claims] 1. A panty hose in which a covering yarn in which a polyurethane elastic yarn is covered with a polyamide yarn is used for at least all courses of a leg portion,
Pantyhose: Standard deviation STσ (g) of stress ST value (g) at 150% elongation of the polyurethane elastic yarn satisfies the following expression: 0.03 ≦ STσ ≦ 0.15 (1). 2. The pantyhose according to claim 1, wherein the standard deviation STσ (g) of the stress ST value (g) at 150% elongation of the polyurethane elastic yarn satisfies the following expression (2): ≦ STσ ≦ 0.10 (2). 3. A step of: a) selecting so that a stress ST value (g) of a polyurethane elastic yarn at 200% elongation satisfies the following formula; and b) covering the polyurethane elastic yarn with the polyurethane elastic yarn and covering the yarn. And a step c) knitting the covering yarn at least over the entire course of the leg portion, a method for manufacturing panty hose: STx-0.3≤ST≤STx + 0.3 (3) where , STx represent the process average capability value (g) of the stress ST value (g) at 200% elongation of the polyurethane elastic yarn. 4. The method for producing panty hose according to claim 3, wherein the polyamide yarn is obtained by directly spinning, stretching and winding.