JPH05339802A - Covering stocking - Google Patents

Abstract

PURPOSE:To provide the stocking giving a suitable dimensional size after set on a leg mold capable of easily putting not having defects such as course irregularity and having a uniform and beautiful appearance. CONSTITUTION:At least a leg part is knitted with only a covering yarn produced by winding a core comprising melt-spun polyurethane elastic fibers having a heat set constant of >=70% with nylon filaments.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stocking having a leg portion knitted only with polyurethane covering thread.

[0002]

2. Description of the Related Art For women's stockings, a real twist torque yarn obtained by subjecting a nylon filament yarn to a strong twist or a wooly nylon yarn obtained by subjecting a nylon filament yarn to a false twist process is used. However, such a stocking is a stocking that uses the twisting torque of nylon or the crimping / expanding force of false-twisted yarn, and therefore has the drawback of causing lumps in the knees or ankles when worn for a long time or when wet with water.

On the other hand, as a stocking with improved Talmi, there is a stocking in which one covering yarn and one nylon filament yarn are knitted alternately with a thin denier polyurethane elastic yarn wrapped with a nylon filament yarn (hereinafter referred to as a knitted stocking). Conventionally known.

In such a knitted stocking, in the knitting step, the knitting stocking of FIG. 2 in which one covering yarn and one nylon filament are alternately knitted (9 is a covering yarn, 10 is a nylon filament yarn) has an appropriate fit. It has the property and tightening force. However, as is clear from Fig. 2, in the knitted stocking, different kinds of fibers having different physical properties are alternately arranged, so that the appearance looks as if there is a course unevenness (a stair), and the aesthetics There is a disadvantage inferior to.

As a stocking having excellent fit and tightening force while eliminating such course unevenness, a stocking in which all covering threads are knitted without alternately arranging the covering threads and the nylon filament threads. An attempt has been made to develop (hereinafter referred to as covering stockings).

[0006]

However, such a covering stocking has the following problems. The usual manufacturing method for stockings is to knit, toe, sew panties, dye, etc., and then heat set in a foot-shaped aluminum plate to finish it into an appropriate size. The purpose of the heat setting is to improve the appearance of the knitted fabric by stretching the knitted fabric to an appropriate size and to set the pattern, and to set the standing size (the size when the stocking is placed on the board) to an appropriate size. By doing so, it is possible to wear it comfortably.

Particularly in covering stockings, the proportion of polyurethane elastic yarns is higher than that in interlaced stockings, and since the elastic elasticity is large in proportion to it, it usually depends on the product size. If the installation dimension to the part (L _{0 in} Fig. 4) is 60 cm or less, it can not be worn unless it is installed while carefully extending it from the toe, and if it is forcibly worn, it will tear. There is.

However, the covering stockings knitted by covering the conventional polyurethane elastic yarn are
Since the polyurethane elastic yarn has a poor heat setting property, it has a drawback that the polyurethane elastic yarn largely shrinks when the foot is set, and only a stocking having an extremely small set size can be obtained.

Furthermore, when a conventional covering thread is knitted into a covering stocking, unevenness of course intervals and apparent fineness of the covering thread forming the course are uneven.
The course is uneven and only stockings with a poor appearance can be obtained. In stockings in which one covering yarn and one nylon are alternately arranged, two types of raw yarns having different physical properties are knitted alternately, so as described above, the knitted fabric has a "coin streak" of course unevenness. Although the knitting fabric defects exist due to the existence of the course unevenness, the covering yarn stockings have knitting of covering yarns having the same physical properties and the knitted fabric is uniform.

The object of the present invention is to eliminate the above-mentioned drawbacks, to provide an appropriate size after placing the foot mold, which is easy to wear, and which has no defects such as unevenness of the course and has a uniform appearance and looks neat. It is to provide covering stockings. Another object of the present invention is to provide the covering stocking in which the leg dimension and the panty portion dimension are balanced.

[0011]

According to the present invention, a polyurethane elastic yarn, which is melt-spun and has a heat setting rate of 70% or more, is used as a core yarn, and a nylon filament yarn is wound around the core yarn. Covering stockings with knitted parts and heat setting rate of 60%
The covering stocking has a panty portion knitted by using a covering thread in which a nylon filament thread is wound around a polyurethane elastic thread described below.

Such a covering stocking may be prepared, for example, by adding 0.75% by weight or less of a polyurethane elastic material in terms of NCO weight, melt-spinning polyurethane, winding it once, and then covering with nylon filament. Then, at least the leg portion is knitted, sewn, and processed at 130 ° C. using only the covering thread.
It can be obtained by heat setting or the like below.

The heat setting rate referred to in the present invention is a basic physical property of the polyurethane elastic yarn with respect to the setting property when the stocking is set. Generally, polyurethane elastic yarn has high heat resistance and poor heat setting property when the foot is set. And
In a covering stocking made of polyurethane elastic yarn having a heat setting rate of less than 70%, the stocking largely contracts when a foot is set, resulting in a stocking having a small set dimension, which is extremely difficult to wear. on the other hand,
In a covering stocking in which the heat setting rate of the polyurethane elastic yarn used for the panty portion exceeds 60%, the leg portion installation dimension is sufficiently large, but the panty portion is stretched due to contraction stress of the leg portion during heat setting, The panty portion has an extremely long installation dimension, and the leg portion and the panty portion have an unbalanced length, resulting in poor fit in the vertical direction of the panty portion when worn.

That is, in the stocking of claim 2, polyurethane elastic yarn having good heat setting property is used for the leg portion,
The panty portion is a covering stocking using polyurethane elastic yarn having a relatively poor heat setting property, and the difference in heat setting rate between the polyurethane elastic yarn of the leg portion and the polyurethane elastic yarn of the panty portion is at least 10%, preferably 2
It is desirable to have 0% or more.

In the method of measuring the heat setting rate, a load of 5 mg per fineness of the polyurethane elastic yarn is applied and the length l ₀ is taken as the sample length. Then, the sample is stretched by 2 times, and in the stretched state, it is heat-treated in boiling water for 5 minutes. Then, the sample is air-cooled and then relaxed, allowed to stand for 30 minutes under the condition of 25 ° C. × 65% RH, and then the length l ₁ is measured under a load of 5 mg / d. From the above measurements, the heat setting rate is defined below.

[0016]

[Equation 1]

A polyurethane elastic yarn having a heat setting rate of less than 70% is difficult to obtain by a wet spinning method or a dry spinning method, and can be obtained by a melt spinning method.
When a normal dry-spinning method or wet-spinning polyurethane elastic yarn is used for a covering stocking, the above-mentioned uneven knitting (coarse unevenness) occurs frequently, and a stocking with a good appearance cannot be obtained. It is presumed that the cause is that the melt-spun polyurethane elastic yarn has extremely good uniformity of fineness as compared with the dry or wet-spun polyurethane elastic yarn.

Polyurethane elastic yarns having a heat setting rate of less than 70% are prepared by melting a thermoplastic polyurethane polymer, extruding from a spinneret, air-cooling and then melt-spun polyurethane elastic yarns or molten polyurethane elastic yarns. A reactive melt-spinning polyurethane elastic yarn obtained by adding and mixing a polyisocyanate compound having a functional NCO terminal (hereinafter referred to as a cross-linking agent), extruding from a spinneret, and air-cooling and winding, particularly the latter method, Since the polyurethane elastic yarn has good wear resistance, it is desirable for the present invention.

Regarding the reactive melt spinning method, Japanese Patent Publication No. 58-4
As described in detail in Japanese Patent No. 6573, the polyisocyanate compound used in the reaction melt spinning method of the present invention has a molecular weight of 40 having an average of 2 or less NCO groups in one molecule.
Compounds of 0 to 3000 are desirable.

When a small amount of a polyisocyanate having more than two NCO groups in one molecule is added to and mixed with a melted polyurethane elastic yarn, not only the melt viscosity becomes extremely large and spinning becomes difficult, but also the addition at the time of addition and mixing is performed. A slight variation in the amount causes a large variation in the physical properties of the obtained polyurethane elastic yarn, resulting in frequent occurrence of uneven knitting (coarse unevenness) due to the difference in the physical properties of the polyurethane elastic yarn. Therefore, in order to increase the viscosity in the spinning process and to homogenize the physical properties of the polyurethane elastic yarn, the polyisocyanate compound contains NC in one molecule.
A compound having 2 or less O groups on average is desirable, and NCO at both ends
It is more preferable to use a mixture of the base polyisocyanate compound and a polyisocyanate compound having one blocked.

A polyisocyanate compound having two or less NCO groups in one molecule is a polyol having hydroxyl groups at both ends.
4'-diphenylmethane diisocyanate (hereinafter MD
I) can be obtained by a method of reacting I) in a molar amount twice the amount of the hydroxyl group to obtain a polyisocyanate compound having NCO groups at both terminals, and then reacting alcohols in an amount of 50% or less with respect to the amount of the NCO group. The polyol having hydroxyl groups at both ends is a polyester, polyether, polycarbonate-based polyol or the like, and a compound having a molecular weight of 300 to 2500 is desirable, and the alcohol reacted with the polyisocyanate compound is an aliphatic alcohol having a boiling point of 50 ° C. or higher. Is preferable, and alcohols that are liquid at room temperature, such as ethyl alcohol, butyl alcohol, isopropyl alcohol, and hexyl alcohol are preferable.

The cross-linking agent is preferably added in an amount of 0.75 wt% or less per polyurethane elastic body in terms of NCO weight and spun, and the NCO weight conversion is, for example, the NCO wt% in the cross-linking agent measured by amine titration method. When A and the addition amount of the crosslinking agent are B (% by weight), they are calculated by the following formula.

[0023]

[Equation 2]

The polyurethane elastic yarn used for the leg portion in the present invention will be described below. The fineness of the polyurethane elastic yarn is preferably in the range of 5d to 30d. This is because a polyurethane elastic thread thinner than 5d may have a poor fit.

The hardness of the polyurethane elastic body is J
The ISA hardness is preferably in the range of 83 to 93.
With a polyurethane elastic body having an A hardness of 83 or less, the polyurethane elastic yarn may be cut in the knitting step after covering. In addition, a polyurethane elastic body having an A hardness of 93 or more may not have sufficient stretchability after being made into stockings, so that good fitting properties may not be obtained.

The spinning conditions of the polyurethane elastic material are, for example, after melting at 200 to 240 ° C., or after injecting the cross-linking agent into the melted polyurethane elastic material as described above and thoroughly mixing it, 0.2 to For example, it may be extruded into the air through a 1.0 mmφ nozzle hole and cooled and wound up.

For winding, the ratio of the distance L ₀ between the delivery roller and the winding traverse to the traverse width L ₁ is 1.
It is desirable that the process be performed at 5 × 10 ⁻³ or less. L ₁ / L
_{When the 0} ratio exceeds this range, the fineness variation width of the wound polyurethane elastic yarn becomes large, and there is a possibility that good stocking may not be achieved as described later. In addition, it is desirable that the spun-up polyurethane elastic body is left (aged) at room temperature for at least several days.

The polyurethane elastic yarn obtained as described above is stretched by applying a load of 35 mg / d to the polyurethane elastic body and then heating it from room temperature at a temperature rising rate of 3 ° C./sec. The temperature (heat resistant temperature) when it is doubled is 150 ° C. or less.

The covering thread used for the leg portion in the present invention is a polyurethane elastic thread having a heat setting rate of 70% or more, preferably 80% or more and a nylon filament of 3d to 20d usually wound around it. It may be a single winding (single covering) or a double winding (double covering).

The number of twists (number of times the nylon filament is wound) during the covering is 800 to 3000 T /
M is desirable. FIG. 1 is a side view of a single covering machine showing an example of such a covering method. In the figure, the polyurethane elastic yarn Y ₁ is unwound from the package A, is supplied to the take-up roller 4 through the supply roller 2, the hollow spindle 3, and the package B rotated by the hollow spindle 3. The nylon filament Y ₂ is unwound and wound around the polyurethane elastic yarn under the anti-twist guide 8 to become the covering yarn Y ₃ . Here, 5 is a guide, 6 is a winding roller, and 7 is a winding package.

In the present invention, the above object is achieved by using the covering thread thus obtained in the leg portion. Furthermore, the fineness variation width of the polyurethane elastic thread at the time of covering is further increased. By setting it to 18% or less, a stocking with a more excellent appearance can be obtained.

The fineness variation width of the polyurethane elastic yarn will be described in detail below. First, in FIG. 1, the polyurethane elastic yarn is stretched between the roller 1 and the roller 2 and between the roller 2 and the roller 4, and the extension ratios during that time are referred to as a first-stage draft and a second-stage draft.

Here, for example, in the case of the covering machine shown in FIG. 1, only the polyurethane elastic yarn is run without winding the nylon filament, and the fineness measuring sensor is set on the upper side of the twisting guide 8. The measured fineness variation width is defined as the fineness variation width of the polyurethane elastic yarn at the time of covering.

When the measurement is performed without using the covering machine, the measurement may be performed by the apparatus shown in FIG. 3, for example. When measuring by the method of FIG. 3, the first-stage draft of roller 1 and roller 2 and the second-stage draft of roller 2 and roller 4 are
The conditions are set to the same as the conditions of the covering machine, and the fineness measurement sensor 11 continuously measures. As the fineness measuring sensor 11 for continuously measuring the fineness variation, one having a capacitance change as a measuring principle (Evenestester “KET-80C” manufactured by Measuring Instruments Industry Co., Ltd.) or a circular monofilament is used. When measuring, a fiber diameter is measured optically (“CONTROL” manufactured by ZIMMER
461D / 2 ”).

The measurement conditions are 16 m per original length of the polyurethane elastic yarn, and the maximum fineness D _MAX and the minimum fineness D _{MiN are measured.}
Is read from the chart, and the width of fineness variation is calculated below.

[0036]

[Equation 3]

As described above, the meaning of measuring the fineness variation width of the polyurethane elastic yarn under the covering condition is that the polyurethane elastic yarn is greatly expanded by a slight external force unlike ordinary nylon filament yarn or polyester filament yarn. This is because the polyurethane elastic yarn that shrinks or is wound up in the package sticks with time.

As a result, even with the same polyurethane elastic yarn, depending on the draft distribution at the time of covering, the resistance of the guides or the degree of sticking on the package,
The width of variation in fineness changes greatly. Therefore, it is preferable to set the covering conditions such that the width of fineness variation is 18% or less, depending on the physical properties of the polyurethane elastic yarn. When knitting a covering thread covered with a fineness variation width of more than 18% into a covering stocking, defects such as uneven course due to uneven physical properties of the polyurethane elastic thread appear and a stocking with a good appearance cannot be obtained. There is a risk.

Here, the covering conditions for the fineness variation width to be 18% or less include the first-stage draft × 2.
It is desirable to set the first-stage draft to 1.5 to 3.5 and the first-stage draft to 1.1 to 2.2. At this time,
For the ratio between the first-stage draft and the second-stage draft, measure the fineness variation rate and make a draft distribution with a small variation width. That is, for the raw yarn with a large sticking of the polyurethane elastic yarn, the width of fineness variation becomes large unless the first-stage draft is set large. Further, the polyurethane elastic yarn with less sticking has a defect that the fineness variation rate becomes large if the first-stage draft is too large.

As a method of reducing the variation in fineness, the polyurethane elastic yarn spun as described above may be wound around a paper tube or the like with a traverse width of at most about 8 cm and then subjected to a covering process.

Using only the covering thread as described above, at least the leg portion of the stocking is knitted.
At this time, the single covering thread with torque is S
It is preferable to alternately knit one torque yarn and one Z-torque, but it is not necessary to alternately knit the torqueless double covering yarn.

As the knitting machine, an ordinary two-knitting machine, a four-knitting machine or the like may be used for knitting. In knitting, it is preferable to adjust the knitting tension or the loop forming function of the knitting needle so that the stitch loop is uniform. Further, FIG. 4 shows the welt portion, the leg portion and the toe portion corresponding to the panty portion before sewing, but when knitting a stocking, it is normal to use different raw yarns according to the respective required performances. ..

Further, in the case of the covering stockings according to claim 2, the polyurethane elastic yarn used in the panty portion is a polyurethane having a heat setting rate of 60% or less spun by a usual dry spinning method, a wet spinning method or a melt spinning method. Elastic threads can be used. In addition, the fineness is usually the same as that of the leg portion, or is preferably in the range of 8d to 50d, which is thicker than the fineness.

The covering thread for the panty portion is usually obtained by wrapping a single or multiple nylon filament yarn such as a nylon flat yarn or a false false twisted yarn of 10d to 50d around the polyurethane elastic yarn. Then, an S twist yarn and a Z twist yarn are alternately knitted by a normal two-thread or four-thread multi-circle knitting machine so that the knitted fabric does not have obliqueness. The panty portion may be knitted by alternately arranging the covering thread for the panty portion and another nylon filament thread, or a covering thread.

Knitted stockings are usually 60-
Shrink heat treatment of stockings with steam at 100 ° C. Next, after sewing the toe tip portion, the welt portions of the two knitted fabrics are sewn to complete the panty portion, and then a dyeing process or a softening process is performed. In addition, insert the stockings sewn up to the panty into two plate-shaped shoes of appropriate size,
Heat set with steam. In addition, as another method, after sewn on the toe, dyeing or softening, put each one in a plate-shaped foot mold and heat-set, and make the welt part of the two heat-set knitted fabrics into a panty shape. There is a method of sewing. The optimum temperature for heat setting is 100 to 130 ° C.
If the heat setting temperature is 100 ° C. or lower, the heat setting effect cannot be obtained, and if the heat setting temperature is 130 ° C. or higher, the stocking has a hard texture.

After the heat setting step is completed, the stocking is cooled and removed from the plate-shaped foot mold. Here, in a covering stocking using a polyurethane elastic yarn having a small heat setting rate, the stocking largely contracts when the toe is set, resulting in a stocking having a small set dimension.

[0047]

【Example】

Example 1 A polyurethane elastic body of A hardness 85 composed of hexamethylene glycol, 4,4′-diphenylmethane diisocyanate (hereinafter MDI) and 1,4-butanediol (hereinafter 1,4-BG) was melted at 230 ° C. After spinning with a 3 mmφ spinning head, the traverse width is 6.5 cm after cooling,
A winder with a distance of 70 cm between the delivery roller and traverse is wound at 500 m / min.
A 0 denier monofilament was obtained. The heat setting rate measured after leaving the polyurethane elastic yarn for 1 week was 95%,
The heat resistant temperature was 105 ° C.

Then, using the covering machine shown in FIG. 1, an optical wire diameter measuring device is installed at the position of the twist guide (8), and the total draft of the covering (first draft × second draft) is provided. It was set to 2.4, the first stage draft ratio and the second stage draft ratio were changed to the conditions described in Table 1, and the fineness variation width was measured. Next, hollow spindle 20,000 rpm, twist number 1500 T / M, covered yarn 10d / 5f
Six types of single-covering yarns A to F corresponding to the draft distribution in Table 1 were obtained from the nylon filaments.

Next, the 4-knitting machine Super 4 manufactured by Nagata Seiki Co., Ltd.
-II using a single covering thread in which a 20d polyurethane elastic thread covers 40d nylon false-twisted thread in the welt section, and the above 6 kinds of single covering threads are alternated between S twisted thread and Z twisted thread in the leg section. To the
Knitted covering stockings.

On the other hand, a commercially available 20d dry-spun polyurethane elastic yarn (heat set rate of 58%) and 13d / 5f nylon yarn are covered with a total draft of 3.3 times the first draft 1.8, and the twist number of 1800T. Under the condition of / M, a covering thread for interlaced stockings was obtained. The fineness variation rate of the polyurethane elastic yarn measured in the covering step was 22.0%. Using such a covering thread and a 13d / 3f nylon thread, the covering thread and the nylon filament were knitted into an interlaced stocking using the same knitting machine as the above knitting machine. (G)

Six kinds of the covering thread stockings and one kind of the knitted stockings were sewn and dyed by a conventional method, and then the welt width was 18 cm and the leg top width was 18 c.
m, tow width 9 cm, total length 95 cm, inserted into an aluminum plate, heat set with saturated steam at 115 ° C. for 15 seconds, cooled and then removed from the foot-shaped aluminum plate, and the dimensions and knitted fabric appearance were evaluated. A wear test was conducted on 10 women in order to evaluate the wearability. The results are shown in the table below.

[0052]

[Table 1]

As shown in Table 1, covering stockings A using polyurethane elastic yarn having a heat setting rate of 95%.
In F, the L length dimension was almost the same as that of the mixed knitting stockings, and the wearability evaluation results of 10 women were all "the same ease of wear as the knitting stockings". It was

However, in the interlaced stocking G, the stock length L-length dimension was finished large, and a loin step due to interlaced knitting was recognized. On the other hand, in stockings A and F in which the fineness variation width of the polyurethane elastic yarn was large, a slight course unevenness or a cycle unevenness in the well direction was observed in the stocking appearance evaluation.

Example 2 Polyhexamethylene adipate, MDI and 1,4-BG
A polyurethane elastic body having an A hardness of 90 was melt-spun. At that time, 2 mol of MDI was allowed to react with polycaprolactone glycol having a molecular weight of 850, and the isocyanate group compound (I) having both ends at 6.2% by weight of NCO was melted as a cross-linking agent in a weight ratio of 5 to the above polyurethane elastic body.
%, 8%, 12%, 15% were added and mixed. 1 of the cross-linking material
The theoretical value of the isocyanate group in the molecule is 2, and the NCO addition amount of each is 0.31%, 0.50%, 0.74%,
It was 0.93%.

Then, spinning was performed from a nozzle having a diameter of 0.3 mm and wound in the same manner as in Example 1 to obtain a polyurethane elastic yarn having a circular cross section of 10d / 1f. (I, J, K, L)
At the same time, the above isocyanate compound is not added at all 1
A polyurethane elastic yarn of 0d / 1f was also obtained. (H)

Next, five wound polyurethane elastic yarns were rotated by a surface drive method, stretched 2.0 times to be unwound from the package, and then relaxed and shrunk 0.55 times to have a traverse width of 5 cm. It was wound up on a paper tube with a winder to obtain 5 types of polyurethane elastic yarns with extremely low degree of sticking. A commercially available dry-spun polyurethane elastic yarn (10d) was also rewound into a paper tube under the same conditions. (M)

Then, using a double-covering machine equipped with two hollow spindles, the first stage draft 1.3, 2
Double-covering yarn 6 with 7d / 5f nylon thread wound twice under the conditions of the first-stage draft 1.8, the lower-stage twist number 2400T / M, and the upper-stage twist number 1920T / M
Got kind.

The width of the fineness variation of the polyurethane elastic yarn was set to the same draft distribution as that of the covering machine using the device of FIG. 3, and the fineness measuring sensor was measured using the capacitance type measuring sensor. Next, in the same manner as in Example 1, a covering stocking was knitted and processed in the same process as in Example 1 to obtain 6 types of covering stockings H to M made of double covering yarn. The obtained stockings were evaluated in the same manner as in Example 1 to evaluate the appearance of the stockings and the wear of 10 women. The results are shown in Table 2.

[0060]

[Table 2]

As shown in Table 2, the stockings H to K according to the present invention were covering stockings having a large L length set dimension, no defect in the appearance of the knitted fabric, and excellent wearability and fitability. In addition, FIG. 5 shows a photograph of the knitted surface of the stock king I. However, each of the stockings L and M has a markedly small set dimension after the foot mold is set, and as a result, it is difficult to wear them, and in some cases, they are torn when worn.

Example 3 A thermoplastic polyurethane elastic body (I) having an A hardness of 90 and consisting of hexamethylene glycol, MDI and 1,4-butanediol was obtained. On the other hand, as a cross-linking agent, the cross-linking agent (I) of Example 2 was reacted with 0.5 mol of butanol at room temperature to block one part of the isocyanate groups at both ends with butanol, and the NCO content was 4.7% by weight. (II) was obtained.

Next, the polyurethane elastic material (I) was melt-spun. At this time, 0% by weight, 8% by weight, 15% by weight, 2% by weight of the polyurethane obtained by melting the crosslinking agent (I).
0% by weight was added and mixed, and then extruded from a nozzle of 0.3 mmφ to obtain four types of polyurethane elastic yarns M, P, Q, and R each having a circular cross-sectional shape of 20 d / 1 f. On the other hand, the cross-linking agent (II) was added to the molten polyurethane elastic body (I) in the same manner by 5% by weight and 15% by weight, respectively, and mixed for 20 d / 1f.
Two types of polyurethane elastic yarns N and O were obtained.

The above polyurethane elastic yarn and the commercially available dry-spun polyurethane elastic yarn 20d were covered under the conditions of a covering draft 2.4 and a twist number of 1500 T / M.
In accordance with the method of No. 57391, 7 types of single-covering yarns for the leg part were obtained, in which nylon filament yarns 10d / 5f were wound in the S twist and Z twist directions, respectively.

Further, as the covering thread for the panty part, 30 is added to the commercially available 20d dry-spun polyurethane elastic thread.
A single covering yarn was obtained by winding a d / 10f nylon false twisted yarn in the S twisting direction and the Z twisting direction under the conditions of a covering draft of 3.0 and a twist number of 600 T / M. In addition,
The heat setting rate of such commercially available polyurethane elastic yarn is 36%
Met.

Next, Nagata Seiki 4-knitting machine Super 4-
II, 140d of dry-spun polyurethane elastic yarn is used for the waist band, S-twisted yarn and Z-twisted yarn for the panty portion covering ring are alternately arranged in the panty portion, and the polyurethane elastic yarns A to S-twisted yarns and Z-twisted yarns of the F covering rings were alternately arranged, and the covering stockings were knitted using the nylon filament yarn 40d / 10f in the toe portion.

Then, the toe part and the panty part are sewn and dyed according to a conventional method, and then the welt width 18c.
m, leg top width 18 cm, toe width 9 cm, total length 1
Insert into a 10 cm aluminum plate and steam at 115 ° C for 15
After heat setting for 2 seconds, after cooling, the product was removed from the aluminum plate, and the product placement dimension and knitted fabric appearance were evaluated. A wear test was conducted on 10 women in order to evaluate the feeling of wearing. The evaluation results are as follows. The stocking numbers correspond to the polyurethane elastic yarn numbers.

[0068]

[Table 3]

As shown in Table 3, in each of the stockings of the present invention, the leg portion had a long placement dimension, the panty portion had a short placement dimension, and the appearance was evaluated and the wearability of 10 women was good. .. However, in the stockings (R, S) outside the present invention, the unevenness of the course is conspicuous in the legs, and the floor dimension of the panties is abnormally long. As a result, the fit of the panties in the vertical direction is insufficient when worn. Therefore, there have been many requests from the wearer to improve the fit of the panty portion.

Example 4 The covering thread of the polyurethane elastic thread N of Example 3 was used as the leg portion, and the polyurethane elastic threads O, P, and P of Example 3 were used.
Q and R and commercially available 20d dry-spun polyurethane elastic yarn S
5 types of covering draft 3.3 times, twist number 600
Using 30 d / 10 f nylon false twisted yarn and 5 types of covering single-covering yarns under the condition of 10 times / m, respectively, were knitted into a covering stocking under the same conditions as in Example 3, and then used in Example 3. 5 kinds of pantyhose O'by heat setting under the same conditions,
P ', Q', R ', S'was obtained.

Table 4 shows the results of evaluation of the dimensions of the pantyhose, the appearance and the wearing of the stockings.

[0072]

[Table 4]

Example 5 A thermoplastic polyurethane elastic body having an A hardness of 85 and composed of polybutylene glycol, MDI and 1,4-butanediol was melt-spun. At that time, 8% by weight of the crosslinking agent (III) of Example-1 was added and mixed to obtain a 15d polyurethane elastic yarn having a heat setting rate of 88%. Next, covering draft 2.5, lower twist number 2400T / M, upper twist number 1920T / M
Under the conditions described above, a double-covering yarn in which a 7d / 5f nylon filament yarn was doubly wound was obtained.

Then, the double covering thread is used for the leg portion, the panty portion is used only for the covering thread used in the panty portion of the third embodiment, and the covering thread and 30d / 1.
Two types of pantyhose (T) and (V) in which one 0f nylon false twisted yarn was alternately arranged were knitted.
Then, according to the usual method, after sewing and dyeing,
Heat setting was performed under the same conditions as the mold setting conditions of Example 3, and the covering stockings (T) in which the panty portion consisted only of the covering thread, and the covering stockings in which the panty portion consisted of a knitting of covering thread and nylon false twisted yarn. (V) was obtained. The leg part and panty part dimensions of both covering stockings are 75
cm, 19 cm, 76 cm, and 24 cm, and all of the stockings had a clean appearance with no uneven course.

As a result of being worn by 10 women, the legs and panties had good fit.

[0076]

The covering stockings according to the present invention are uniform and have a beautiful appearance without coarse unevenness or periodic unevenness in the well direction. Further, the stock size after setting the foot mold is large, and the stocking is easy to wear as in the conventional interlaced stockings and has excellent fit.

The stocking of claim 2 is a covering stocking in which the dimensions of the leg portion and the dimensions of the panty portion are well-balanced, and can be easily worn in the same manner as ordinary knit panty stockings.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a covering machine.

FIG. 2 is a photograph of a knitted surface of a conventional interlaced stocking, showing the shape of fibers.

FIG. 3 is a side view of a fineness variation width measuring device for polyurethane elastic yarn.

FIG. 4 is a side view of the stocking of the present invention.

FIG. 5 is a photograph of a knitting surface of a covering stocking according to the present invention, showing the shape of fibers.

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D04B 1/26

Claims (2)

[Claims] 1. A cover ring in which at least a leg portion is knitted with only a cover ring yarn obtained by melt spinning, a polyurethane elastic yarn having a heat setting rate of 70% or more as a core yarn, and wrapping a nylon filament yarn around the core yarn. stockings. 2. The covering stocking according to claim 1, wherein the covering stocking has a panty portion knitted with a covering thread in which a nylon filament thread is wound around a polyurethane elastic thread having a heat setting rate of 60% or less.