JPH07157902A - Panty hose and its production - Google Patents

Abstract

PURPOSE:To provide a panty hose having extremely excellent transparency, flat touch, refreshing touch and luster having not been obtained with conventional panty hoses, and excellent in skin touch, soft touch, color fastness, and fitness. CONSTITUTION:In a panty hose in which the knitted fabric of the leg part is produced only from covered elastic yarns, the covering yarns of the covered elastic yarns comprise polyamide filament yarn substantially not containing titanium dioxide, each having a flatness (b/a) of 2.0-6.0, a flat cross-sectional shape substantially comprising straight parts and circular parts and substantially not having a depressed part, a filament fineness of 5-15 denier and a filament number of 2-7. The polyamide preferably contains a specific acid amide compound. The panty hose product excellent in fitness, fashionability, amenity and durability on wearing is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a stocking in which at least a leg part knitted fabric is knitted substantially only with covering elastic yarns. Especially good transparency, flatness, gloss, touch, fit, durability,
The present invention relates to a stocking having comfort to wear.

The change of pantyhose in recent years has been remarkable, from the conventional pantyhose using false twisted nylon thread to the “support” pantyhose using covering elastic thread in which nylon thread is wound around polyurethane elastic thread. It is shifting rapidly. This "support" pantyhose has been well received in the market because it has excellent fitability due to stretch recovery of the polyurethane elastic yarn and also has good durability.

Further, this "support" pantyhose has conventionally been manufactured by alternately knitting covering elastic yarns and nylon yarns, but recently, while eliminating horizontal rows due to interlaced knitting, For the purpose of obtaining a high fit property, pantyhose in which a leg part knitted fabric is knitted only with covering elastic yarns, so-called Zocchi "support" (hereinafter referred to as Zocchi stocking) has been commercially available.

[0004]

Since the covering elastic yarn has a structure in which a nylon yarn is wound around a polyurethane elastic yarn to cover it, it tends to have a large fineness and is transparent as compared with a conventional stocking made of false twisted yarn or composite fiber. It has disadvantages such as poor quality, discoloration, and thick fabric. This disadvantage is exacerbated when using Zokki stockings,
In addition, Zokki stockings had a big problem that the gloss was lost and the flatness was inferior.

Therefore, in order to improve this problem, it is required to make the covering yarn finer. However, since the fineness of the covering yarn induces a practically unfavorable problem that the durability of the stocking is deteriorated, it is not an effective improvement measure and further improvement has been desired.

Further, it is effective to increase the number of windings (covering twist number) at the time of covering in order to prevent deterioration of durability due to fineness, but if this is done, another problem of reduction in production efficiency will occur. As it happens, it cannot be a realistic remedy.

By the way, in the covering elastic yarn,
The covering property of how to stretch the nylon thread evenly so that the polyurethane elastic thread does not appear on the surface is important in order to enhance the durability, the appearance of the cloth, the color tone, the texture, etc. of the obtained stocking.

Therefore, as a technique for improving the covering property, long fibers having a non-circular cross section of Y-shape, T-shape, X-shape, U-shape, H-shape, L-shape and E-shape are wound around a polyurethane elastic yarn. This is proposed in Japanese Examined Patent Publication No. 64-3965.

However, since the long fibers having a non-circular cross-section have considerable irregularities in the cross-sectional shape of the fibers, there is a major problem that the transparency, luster, flatness, etc. of the obtained stockings are significantly deteriorated. I have it.

Therefore, it is difficult to sufficiently improve the transparency, the wearing comfort, the feeling of flatness, the feeling of luster, the feeling of material thickness, etc. even if these conventional techniques are applied to Zocchi stockings.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and in a Zokki stocking substantially knitted with only covering elastic yarns, the transparency, flatness,
By improving the luster, the thickness of the fabric, the wearing comfort, etc.,
The main purpose of the present invention is to obtain a zocchi stocking that has excellent transparency, flatness, touch, gloss and wearing comfort that are not obtained by the conventional zocchi stocking technology, and that has good fit and durability.

[0012]

To achieve this object, the stocking of the present invention is a stocking in which at least the leg knitted fabric is knitted substantially only with covering elastic yarns, wherein the covering elastic yarns are elastic. A flat fiber cross-section composed of a polyamide having a fiber as a core yarn and substantially containing no titanium oxide, and having a ratio (b / a) of a major axis b to a minor axis a of 2.0 to 6.0. It is a composite elastic yarn obtained by winding a covering yarn composed of long fibers having a surface shape, and the method for producing stockings of the present invention is composed of polyamide containing substantially no titanium oxide. And the major axis b and the minor axis a
A covering elastic yarn is produced by winding a covering yarn composed of a plurality of long fibers having a flat fiber cross-sectional shape having a ratio (b / a) of 2.0 to 6.0 with a circumference of the elastic fiber. The stocking is manufactured by knitting at least the leg knitted fabric substantially only with the covering elastic yarn.

The stockings targeted by the present invention are stocking products represented by pantyhose, long stockings and short stockings.

FIG. 3A shows a toe portion 11 and a heel portion 1.
2 illustrates a long stocking having 2.
The leg part 13 is a part above the part corresponding to the ankle just above the heel part 12. An elastic belt portion 15 is usually provided at the upper end of the leg portion 13.

FIG. 3B shows an example of panty hose, which is composed of a toe part 11, a leg part 13, a panty part 14 and a stretchable belt part 15, and in the panty part 14 and the stretchable belt part 15. The left and right parts are sewn together.

In the stocking of the present invention, it is necessary to knit the knitted fabric of at least the leg portion of such stocking only with the covering elastic yarn, which can solve the problem of lateral streaks. The leg part knitted fabric may be provided with a braided pattern made of another material or a decoration such as one point.

On the other hand, in a knitting stocking in which covering elastic yarns and nylon raw yarns are alternately knitted, the effect of improving gloss can be obtained by using the covering elastic yarns specified in the present invention, but other characteristics are improved. It is not possible to obtain the stocking which is the object of the present invention, which has a small effect and has a good fit property, a feeling, a touch, and a flatness without any knitting.

The covering elastic yarn is a single covering elastic yarn (SCY) as shown in the schematic view of FIG. 4 (a).
Alternatively, it may be a double covering elastic yarn (DCY) as shown in the schematic view of FIG. 4 (b). The single covering elastic yarn is a composite elastic yarn obtained by wrapping the covering fiber 2 around the elastic fiber yarn 1 in a single layer. The double-covering elastic yarn is a composite elastic yarn in which the covering yarns 2 and 3 are doubly wound around the elastic fiber yarn 1 in different winding directions.

In the covering elastic yarn used in the present invention, the covering yarn is made of polyamide containing substantially no titanium oxide, and the ratio (b / b) of the major axis b to the minor axis a.
It is important that a) is composed of long fibers having a flat fiber cross-sectional shape of 2.0 to 6.0.

The polyamide long fibers may be ordinary polyamide fibers such as nylon 6 fibers and nylon 66 fibers. Among them, nylon 6 fibers having particularly excellent transparency and glossiness are It is preferable as a covering thread for Zocchi stockings where glossiness is particularly important.

The nylon 6 fiber is preferably a polyamide composed of only nylon 6 units,
Other polymer units, such as 66 units of nylon and 610 units of nylon, may be copolymerized as long as they are in a small amount such as not more than 3 mol% so as not to impair the mechanical properties and transparency. Similarly, another polymer may be blended in a small amount such as not more than 3% by weight so as not to impair the mechanical properties and transparency.

The strength and elongation characteristics of the covering yarn,
In order to bring the durability of the Zokki stockings to a desired level, it is preferable that the 98% sulfuric acid relative viscosity is 2.5 to 3.5.

If necessary, the polyamide may include a light stabilizer, a heat stabilizer, an antioxidant, an antistatic agent, a dyeability improver, etc., as long as it is an additive that does not impair the transparency. However, in order to achieve the intended purpose of improving the transparency, touch, durability, etc. of Zocchi stockings, the fact that matting agents and pigments typified by titanium oxide are not substantially contained is necessary.

Titanium oxide is generally blended as a matting agent in polyamide fibers for socks, and particularly in the case of non-circular cross-section fibers which have a large flicker on the fiber surface, in order to suppress the flicker. The incorporation of titanium oxide has been considered essential. However, in the case of the covering thread used for Zokki stockings, titanium oxide is 0.02%.
Since it is difficult to improve the transparency of the stocking when it is contained in a small amount such as ~ 0.3% by weight, in order to achieve the intended purpose of the present invention, titanium oxide is substantially contained. It is necessary not to let them do it. It should be noted that since matting agents and pigments other than titanium oxide have not been conventionally added to the covering yarn of stockings, it is necessary to substantially not add them as in the conventional case. However,
A very small amount, such as 0.015% by weight or less, particularly 0.010% by weight or less, which does not correspond to substantial addition, may be allowed.

Further, since the flat elastic yarn itself has a great flicker feeling, the knitting stockings using the flat cross section yarn as the knitting yarn have an extremely strong flickering feeling. However, in a stocking knitted fabric knitted only from covering elastic yarn wound with a flat cross section yarn, almost no flicker feeling of the flat cross section yarn appears, so in the Zocchi stocking targeted by the present invention, titanium oxide is used. By not including it, the transparency can be enhanced without the feeling of flicker.

Further, the polyamide fiber as the covering yarn contains 0.01 to 1.0% by weight of the acid amide compound represented by the following general formulas (A) and (B) with respect to the polyamide. However, the transparency and color of the stockings,
It is preferable in order to further improve durability, soft feeling and the like.

[0027]

[Chemical 2]

The acid amide compound is a compound which can be prepared by the reaction of a dicarboxylic acid and an alkylmonoamine or the reaction of a monocarboxylic acid and an alkylenediamine, and is represented by ethylenebisstearylamide.

The diamine used in the reaction is
There are methylenediamine, ethylenediamine, propylenediamine, and butylenediamine, and alkylenediamines having 1 to 10 carbon atoms are included. The alkyl monoamine has 10 to 2 carbon atoms, such as octadecylamine, methyloctadecylamine and ethyloctadecylamine.
Included are primary amines having 0 alkyl groups and secondary amines in which they are further substituted with methyl and ethyl groups.

The dicarboxylic acids used include succinic acid, adipic acid and sebacic acid, which have 2 to 1 carbon atoms.
Two dicarboxylic acids are included. Examples of the monocarboxylic acid include alkylmonocarboxylic acids having 12 to 22 carbon atoms such as lauric acid, palmitic acid and stearic acid.

The polyamide continuous fiber of the covering yarn used in the present invention has a specific flat cross-sectional shape of the fiber.
The cross-sectional shape of the fiber is the ratio of the major axis b to the minor axis a (b /
a) It is necessary that the flat type has a flatness (hereinafter referred to as flatness) of 2.0 to 6.0. Further, 3.0 to 5.0 is preferable.

FIGS. 2 (a) and 2 (b) are fiber cross-sectional views schematically showing a flat fiber cross-sectional shape, and FIG. 2 (a) shows the flatness specified in the present invention. In (b), the flatness is too small. This flatness (b / a)
Is calculated by measuring the major axis b and the minor axis a from the cross-sectional photograph of the flat shape, as shown in FIG.

The flat cross-sectional shape of the fibers having a flatness (b / a) of 2.0 to 6.0 is a slit-shaped discharge hole of the spinneret, and the length / width ratio is 10 or more. It can be obtained by increasing the size.

However, the flatness (b /
a) Flat shape (ribbon shape) such that a) exceeds 6.0
When it is, the durability, the dyeing fastness and the transparency of the obtained knitted fabric are deteriorated, which is not suitable. Further, the frictional resistance in the stretching step and the covering step increases, and there are many troubles such as reverse winding on the roller, which is not suitable.

On the contrary, if the flatness (b / a) is less than 2.0, the effect due to the flat shape is difficult to be exerted, and the intended purpose cannot be achieved.

Further, as shown in FIG. 2, a flat shape (hereinafter referred to as a non-concave flat shape) which is formed of a substantially straight line portion (F) and a convex arc portion (B) and has no substantial recess. ) Is preferable in order to sufficiently achieve the intended purpose of the present invention, and to obtain a stocking having a good balance between light transmission and reflection, excellent transparency and gloss, and excellent tactile sensation. .

In the case of this non-concave flat shape, the linear ratio (f / a) of major axis is preferably 1.0 or more. As shown in FIG. 2, the linear ratio of the major axis is measured by measuring the minor axis a of the flat shape and the major axis length c of a substantially straight line portion that substantially overlaps with the outer circumferential tangent line in the major axis direction, and calculates the values. It is a value calculated from

When the linear ratio (f / a) of the major axis is less than 1.0, there are few flat parts on the outer circumference of the fiber in the major axis direction, which is not preferable in terms of gloss, refreshing feeling, flat feeling and the like. Further, if there are irregularities on the fiber outer periphery, particularly on the fiber outer periphery in the major axis direction, it is likely to become opaque due to diffused reflection on the surface, which is not preferable from the viewpoint of transparency, gloss, flatness, and the like.

The covering elastic yarn obtained by winding such a flat yarn has a structure as illustrated in FIG. 1 (a) is a side view thereof, and FIG. 1 (b) is a transverse sectional view thereof. In FIG. 1, a covering thread 2 made of five flat filaments is single-covered in the S direction around an elastic fiber thread 1 made of two elastic filaments, and a surface 2f in the major axis direction of the flat filament is , Are arranged on the outer surface of the covering elastic yarn. Such a covering elastic yarn structure is suitable for sufficiently achieving the intended purpose such as flatness, transparency, luster and touch of stockings.

The covering yarn has a yarn fineness of 5 to 1
A multi-filament yarn having 5 denier and 2 to 7 filaments may be used. The yarn fineness is preferably 5 to 10 denier in order to further improve the transparency and to obtain excellent durability and wearing feeling. If it is less than 5 denier, practical durability tends to be insufficient, while if it exceeds 15 denier, transparency tends to be insufficient and the texture tends to be coarse and hard, which is not preferable. Further, the number of filaments of 2 to 7 is preferable in order to further improve the transparency, the feeling of wearing, and the durability. In contrast,
When the number of filaments is 1, the texture tends to be rough and hard, and the durability tends to be insufficient. On the contrary, when the filament number is 8 or more, the transparency and the durability tend to be insufficient, which is not preferable.

As the elastic thread forming the core thread of the covering elastic thread, polyurethane elastic fiber, polyamide elastomer elastic fiber, polyester elastomer elastic fiber, natural rubber fiber, synthetic rubber fiber, butadiene fiber, etc. However, polyurethane-based elastic fibers and polyamide-based elastomer elastic fibers are preferred for stockings in terms of their elastic properties, thermal properties, durability and the like.

The thickness of the elastic fiber varies depending on the use of the stocking and the setting of the tightening pressure, but is generally 8 to 70.
It may be about denier. Preferred is 10 to 40 denier. If it is less than 8 denier, the yarn strength will be insufficient, and problems such as core yarn breakage during covering and knitting will easily occur, and the stretchability and durability of the stocking will be insufficient, such being undesirable. On the other hand, when it exceeds 70 denier, the tightening force becomes too strong and the feeling of oppression becomes strong, so that the transparent feeling is lowered and the coarse and hard feeling is increased, which is not preferable.

As the covering elastic yarn used in the present invention, a covering yarn composed of a plurality of flat long fibers having the above-mentioned flatness, which is composed of polyamide containing substantially no titanium oxide, is used as a covering yarn around the elastic fiber. It may be produced by single or double winding according to the method, but at the time of this winding, the covering yarn has a low entanglement or low twist of 5 entangles / m or less or twist number 14 t / m or less. It is preferable that the yarn is By using such a low-entanglement or low-twist yarn, it becomes easy to dispose the surface in the major axis direction of the wound long fiber on the outer surface of the covering elastic yarn. The number of covering twists varies depending on whether the winding is single or double, but is generally 1200 to 2200t.
It may be about / m.

The leg portion knitted fabric made only of the covering elastic yarn may be knitted by a normal method in which only the covering elastic yarn is supplied and knitted by using a knitting machine of two or four stitches. S for single covering elastic yarn
A preferred method is to alternately knit the single covering elastic yarns for direction covering and the single covering elastic yarns for covering in the Z direction. In this way, the leg part knitted fabric may be knitted into a stocking product.

In the case of such a Zocchi stocking, the power level of the stocking tends to be too high in general, so that the 60% elongation recovery stress (60% BP) is 18%.
It is preferable to set the level of 0 to 350 g, and further 20
0 to 300 g is preferable.

This 60% BP is a value which is an index of fit when worn, and when the value is too low, wrinkles and slack are likely to occur, which is not preferable. On the other hand, if it is too high, the tightening pressure will be too high, the feeling of tightness and slackness will be too strong, and the shrinkage of the knitted fabric will be too great, and the uniform appearance will be easily damaged.
Not preferable.

In order to bring the 60% BP to the above level, it is particularly effective to optimize the elastic recovery characteristics of the elastic yarn of the core, and the conditions of the yarn structure, knitting, dyeing and finishing of the covering elastic yarn. Or the like. For example, the type of elastic polymer of the elastic thread of the core (ether polyurethane,
Ester polyurethane, etc.), its spinning method (melt spinning method, dry spinning method, etc.), its yarn fineness, knitting design of stockings (number of stitches, stitches, etc.), its heat setting conditions (finish template size, temperature, etc.) Can be controlled by adjusting.

Here, 60% elongation recovery stress (60% B
P) is obtained by the following method. Let L1 be the sample length when a load of 2 kg is applied to one end of the stocking sample and stretched. Next, using a constant elongation type tensile tester TOM-100E type (manufactured by Shinko Communication Industry Co., Ltd.), this stocking sample was folded in two and subjected to a tensile tester to obtain L1 / 2 of 7
Draw a hysteresis curve of stress strain recovered after stretching to 5%. From the recovery curve of this hysteresis curve, L
The stress value at the time of recovering the length of 60% elongation of 1/2 is 60
% BP (g).

[0049]

As described above, according to the present invention, at least the leg portion knitted fabric is composed of substantially only covering elastic yarn, and in the zocchi stocking, the covering yarn is made of polyamide containing substantially no titanium oxide, and ,
Since it uses a polyamide long fiber yarn with a flat cross-section with a specific flatness, it has excellent properties not obtained with conventional Zocky stockings, such as extremely good transparency, flatness, gloss, and slippage. It can have a feeling of feeling, a feeling of coolness, a feeling of softness, and the like.

That is, the covering yarn used in the present invention is
Since it has excellent transparency and gloss, the uniformity and transparency of the covering elastic yarn are improved, the gloss becomes mild, and the transparency, luster and touch of the stocking knitted fabric are improved.

Moreover, since the flat cross-sectional shape has the above-mentioned flatness, the adhesion and the covering property with the elastic yarn of the core at the time of covering are improved, and for the covering which tends to occur when the conventional round cross-section yarn is used. The floating of the yarn is reduced, the feeling of flatness of the fabric is improved, and the elastic yarn of the core is less exposed.

Further, since it is substantially knitted with only covering elastic yarn, a high fitting force can be easily obtained and 60%.
It becomes easy to set the recovery stress to a suitable range of 180 to 350 g.

With such a high power level, in the case of the conventional Zokki stocking, the flatness is deteriorated due to the shrinkage of the cloth, but when the covering elastic yarn specified in the present invention is used, the coverage is uniform and the elastic yarn of the core is used. Is less exposed and uneven shrinkage of the knitted fabric is suppressed, so that deterioration of flatness can be prevented, and further, processability in the knitting or finishing process is improved.

Further, when the polyamide fiber yarn containing the above-mentioned acid amide compound is used as the covering yarn, the transparency, color tone, durability, softness and the like of the stocking knitted fabric are improved, which is caused by the unevenness of the knitted ground. It is possible to reduce the feeling of roughness and further improve the soft texture.

By improving these characteristics, the knitted fabric as a whole has an extremely soft feeling, is excellent in slippery feeling and refreshing feeling, and has an excellent effect that the touch is improved, so that an extremely good stocking product can be obtained.

[0056]

EXAMPLES The following method was used to evaluate the leg parts of stocking products below.

Transparency: Stocking product, thigh 1
5 cm width, 150 courses / 5 cm widened, two product leg knitted fabrics were overlaid, and color standard white board (L value 8
8.29) L value (Lw) of the knitted fabric when left still, and the color standard blackboard (L value 7.74). The L value (Lb) of the knitted fabric at the time of standing is determined by a color difference meter Σ80.
(Manufactured by Nippon Denshoku Industries Co., Ltd.). Then, the transparency is calculated from these L values by the following formula. The higher this value, the better the transparency. Transparency = (Lw-Lb) / (WB) (where W is the L value of the color standard whiteboard and B is the L value of the color standard blackboard.)

Tactile sensation: A stocking product was put on a human foot, and the inspector (5 persons) relatively evaluated the softness, coolness, and slipperiness of the texture. The result was ⊚: extremely Good, ○: Good, △: Slightly bad, ×:
Defects are shown as criteria.

Durability: JIS (Japanese Industrial Standard) P-8
The burst strength was measured by the burst strength test method using a 131 Mullen high-pressure tester, and the level of the burst strength was used to display the following criteria. ◎: 1.2 kg / cm ² or more, ○:
1.0 kg / cm ² or more and less than 1.2 kg / cm ² , Δ: 0.
9 kg / cm ² or more and less than 1.0 kg / cm ² , x: 0.9 k
Less than g / cm ² .

Flatness: Relative evaluation by the naked eye of the inspector (5 persons), and the results are shown by the same criteria as the above-mentioned tactile sensation.

Fitting property: This is evaluated by a wearing test in which the subject wears 8 hours a day for 3 days, and the results are shown by the same criteria as the above-mentioned tactile sensation.

The above relative evaluation is carried out in the following Examples 1 to 1.
It was based on a relative evaluation through all four.

Dyeing fastness: JIS (Japanese Industrial Standard) L
According to the method of fastness to washing by a laundermeter type washing tester described in -0821, the washing treatment is carried out under the conditions of a soap concentration of washing water of 0.5% by weight, a temperature of 50 ± 2 ° C. and a washing time of 30 minutes. The degree of discoloration of the test cloth before and after was judged by discoloration gray scale (5th to 1st grade). Incidentally, 5th grade: extremely good, 4th grade: good, 3rd grade: somewhat poor, and 2nd grade: 1st: poor.

[Example 1] 98% sulfuric acid relative viscosity 2.8
Nylon 6 containing no titanium oxide was melted at 270 ° C and the slit width was 0.1 mm and the slit length was 1.0-
It was discharged from a spinneret having discharge holes with various slit shapes of 2.5 mm and wound as undrawn yarn at 800 m / min. Then, the flatness (b / a) of the fiber cross section is 2.5 to 2.5 by stretching so that the elongation is 40 to 45%.
Nylon 6 yarns of 10 denier 5 filaments having a flat cross section different from 7.0 were obtained (Nos. 1 to 6).

As a comparison, the 98% sulfuric acid relative viscosity was 2.6.
Then, nylon 6 containing no titanium oxide was spun and drawn in the same manner as above to obtain a nylon 6 yarn having a flatness (b / a) of 1.7 (No. 7).

For comparison, nylon 6 containing 98% sulfuric acid relative viscosity of 2.8 and 0.22% by weight of titanium oxide was spun and stretched in the same manner as above to have a flatness (b / a) of 4.0.
Nylon 6 yarn was obtained (No. 8).

Further, for comparison, a nylon 6 yarn having a round cross section was obtained by melt spinning and drawing in the same manner as in No. 1 except that a circular discharge hole was used (No. 9).

Furthermore, as a comparison, melt spinning and drawing were carried out in the same manner as in No. 1 above, except that spinnerets with different discharge hole shapes were used, and the degree of deformation (= circumscribing circle) shown in FIG. (Radius / inscribed circle radius) 1.6, non-circular cross-section nylon 6 yarn having a Y-shaped cross section, and the degree of deformation (= circumscribed circle radius / inscribed circle radius) shown in FIG. 5B is 1.7. Nylon 6 yarns with non-circular cross section having X-shaped cross section were obtained (No.10, 1)
1).

The flat cross-sections of the fibers of Nos. 1 to 8 are, as in the case of FIG. 2, flat cross-sectional shapes consisting of a substantially straight line portion and a convex arc portion and having no substantial concave portion. Met.

These nylon 6 yarns (twist number 12 t /
m) is used as the covering yarn, 15 denier polyether polyurethane elastic fiber "spandex" is used as the core yarn, the draft ratio of the core yarn is 2.8 times, and the number of twists of the winding is 200.
S-direction single covering elastic yarn and Z-direction single covering elastic yarn were manufactured by performing single covering in the S direction or Z direction at a setting of 0 t / m.

Each of the single covering elastic yarns of the present invention wound with a flat cross section yarn has the flat cross section of the long fiber wound on its outer surface as shown in FIGS. 1 (a) and 1 (b). The surface in the major axis direction was arranged.

Using the obtained single covering elastic yarn, Super 4 knitting machine manufactured by Nagata Seiki Co., Ltd. (400 stitches)
In this), the S-direction single covering elastic yarn and the Z-direction single covering elastic yarn are alternately supplied to the yarn feeder of the knitting machine to make the pantyhose in which the leg part knitted fabric is knitted only with the covering elastic yarn. The dyeing, finishing and template setting were made into panty hose products.

Table 1 shows the results of evaluation of the leg portions of the obtained pantyhose product.

[0074]

[Table 1]

As can be seen from the results shown in Table 1, in the case of the present invention (Nos. 1 to 5), transparency, softness, refreshing feeling,
It was excellent in slipperiness, flatness, durability and dyeing fastness. Especially when the linear ratio (f / a) of the major axis in the fiber cross section is 1.0 or more (No. 1 to 4)
Had a very good soft feeling and the like.

On the other hand, when the flatness exceeds 6.0 (No. 6), the tactile feel is good, but the transparency, durability and dyeing fastness are poor.

When the flat yarn containing titanium oxide was wound (No. 8), the transparency was significantly inferior and the slipperiness was slightly inferior.

Furthermore, when a thread having a round cross section is wound (N
The covering elastic yarn of o.9) was inferior in the uniformity and covering property due to the floating of the wound yarn, and the obtained pantyhose was inferior in the refreshing feeling, slipping feeling, flat feeling and the like.

When a flat yarn having a flatness of less than 2.0 is wound (No. 7), the effect due to the flat cross section is insufficient, and it is the same as when a round cross-section yarn is wound (No. 9). , Refreshing feeling, slipping feeling, flat feeling, etc. were inferior.

Further, when the non-circular cross-section yarns of Y-shaped cross section and X-shaped cross section were wound (Nos. 10 and 11), the pantyhose had good refreshing feeling and durability, but the transparency was extremely high. It was bad.

[Example 2] 98% sulfuric acid relative viscosity 2.7
3, except that nylon 66 containing no titanium oxide and nylon 66 containing 0.22% by weight of titanium oxide at the same relative sulfuric acid viscosity were melted at 285 ° C., respectively.
Melt-spun and stretched in the same manner as in Example 1 No. 3 to obtain a nylon 66 yarn (10 twists / m) with 10 denier 5 filaments and a flat cross section with a flatness (b / a) of 4.0. .

Using the obtained nylon 66 yarn as a winding yarn, a single covering elastic yarn was produced in the same manner as in Example 1 (Nos. 12 and 13).

Each of the obtained single covering elastic yarns was evaluated as a pantyhose product in the same manner as in Example 1. The results are shown in Table 2.

[0084]

[Table 2]

As can be seen from the results shown in Table 2, the pantyhose according to the present invention (No. 12) were all good in all properties.

However, when the covering yarn containing titanium oxide was used (No. 13), the transparency was significantly inferior and the feeling of sliding was slightly inferior.

[Embodiment 3] The flat section yarn of No. 3 and the round section yarn of No. 9 of Example 1 were respectively used as winding yarns.
With a core of denier polyether polyurethane elastic fiber "Spandex", draft ratio 3.0 times, twist number of bobbin winding 2500 t / m, twist number of upper thread winding 2200 t / m
With the setting of m, double covering of S-direction winding-Z-direction winding was performed to produce a double-covering elastic yarn (N
o.14, 15).

The obtained double covering elastic yarn was evaluated as a pantyhose product in the same manner as in Example 1. The results are shown in Table 3.

[0089]

[Table 3]

As can be seen from the results shown in Table 3, the pantyhose according to the present invention (No. 14) was transparent,
It was excellent in softness, coolness, slipperiness, flatness and durability.

On the other hand, when a round cross section thread is wound (N
No. 15) was excellent in durability because it was a double covering elastic yarn, but was inferior in all other properties.

[Example 4] Nylon 6 containing 98% sulfuric acid relative viscosity of 2.8 containing no titanium oxide and containing ethylenebisstearylamide (EBA) in a concentration of 0.30% by weight.
Was melt-spun and stretched in the same manner as in Example 1 No. 2 to obtain a flatness (b / a) of 3.0 and a long diameter linear ratio (c / a).
A nylon 6 yarn having a flat cross section of 10 denier and a filament of 1.6 was obtained (No. 16).

Obtained Nylon 6 Yarn and Example 1
Each of the No. 2 nylon 6 threads is used as a winding thread, and 1
A polyether-based polyurethane elastic fiber "spandex" of 0, 15, 20 denier is used as a core yarn, a draft ratio is set to 2.8 to 3.0 times, and the number of twists of winding is 2000 t /
Single covering was performed at m to produce respective single covering elastic yarns (No. 16 to 18).

Using each of the obtained single covering elastic yarns, knitting was carried out in the same manner as in Example 1 to prepare pantyhose, dyed and finished by a usual method, and a template was set to obtain a pantyhose product.

Table 4 shows the results of evaluation of the leg parts of the obtained pantyhose product. No. 2 in Table 4 is the same as No. 2 in Example 1.

[0096]

[Table 4]

As can be seen from the results shown in Table 4, all the properties were totally good.

Among them, the inclusion of EBA further improved the transparency and the like.

Further, the higher the 60% BP, the better the fit, but it was particularly good if it was not too high in terms of flatness, refreshing feeling and the like.

[0100]

The stocking made of the covering elastic yarn of the present invention has extremely good transparency, flatness, refreshing feeling and glossy feeling, which cannot be obtained by the conventional Zokki stockings, and has a soft touch and a soft feeling. It is possible to make stockings that are excellent and have excellent dyeing fastness and fit.

Therefore, it is possible to obtain a stocking product which is excellent in fit, fashionability, comfort and durability when worn.

[Brief description of drawings]

FIG. 1 illustrates a covering elastic yarn used in the present invention, in which (a) is a side view thereof and (b) is a cross-sectional view thereof.

FIG. 2 is a fiber cross-sectional view schematically illustrating a fiber cross-sectional shape of a flat polyamide cross-section fiber that constitutes a covering yarn of a covering elastic yarn. (A) has the flatness specified in the present invention, and (b) shows that the flatness is too small and is outside the present invention.

FIG. 3 is a front view illustrating a stocking as a target of the present invention, in which (a) illustrates long stockings and (b) illustrates pantyhose.

FIG. 4 is a diagram schematically showing a covering elastic yarn used in the present invention, in which (a) illustrates a single covering elastic yarn and (b) illustrates a double covering elastic yarn.

FIG. 5 is a fiber cross-sectional view schematically showing a fiber cross-sectional shape of a polyamide long fiber having a non-circular cross section which constitutes a covering yarn of a covering elastic yarn. (A) has a Y-shaped cross section,
(B) has an X-shaped cross section, both of which are outside the scope of the present invention.

[Explanation of symbols]

1: elastic fiber yarn, 2, 3: covering yarn, 13:
Leg part, a: minor axis, b: major axis, f: major axis direction length of substantially straight line part that substantially overlaps with major axis direction outer peripheral tangent line, F: substantially straight line part, B: arc part

Claims (12)

[Claims] 1. A stocking in which at least a leg knitted fabric is knitted substantially only with covering elastic yarns, wherein the covering elastic yarns have elastic fibers as core yarns and do not substantially contain titanium oxide in the periphery thereof. A covering thread made of polyamide and having a flat fiber cross-sectional shape with a ratio (b / a) of major axis b to minor axis a of 2.0 to 6.0 is wound. Stocking characterized by being a composite elastic yarn. 2. The stocking according to claim 1, wherein the polyamide constituting the long fibers of the covering yarn is nylon 6. 3. The polyamide constituting the long fibers of the covering yarn has a degree of polymerization represented by 98% sulfuric acid relative viscosity of 2.5 to 3.5.
Stocking described. 4. The flat fiber cross-sectional shape of the long fibers of the covering yarn is a flat cross-sectional shape having substantially straight portions and convex arc portions and having substantially no recess. The stocking as claimed in claim 1, 2 or 3. 5. The stocking according to claim 1, wherein the surface of the covering yarn in the major axis direction of the long fiber is arranged on the outer surface of the covering elastic yarn. 6. The covering yarn has a yarn fineness of 5 to 5.
The stocking according to claim 1, 2, 3, 4 or 5, wherein the stocking has 15 denier and 2 to 7 filaments. 7. The covering elastic yarn is a single covering elastic yarn in which a covering yarn is wound around the core yarn of the elastic fiber in a single layer, or a covering yarn is wound around the core yarn of the elastic fiber. The stocking according to claim 1, wherein the stocking is a double-covering elastic yarn formed by double-wrapping the different stocks. 8. The polyamide constituting the long fibers of the covering yarn is 0.01 to 1.0 with respect to the polyamide.
8. A stocking according to claim 1, which is a polyamide composition containing a weight% of an acid amide compound represented by the following general formula (A) or (B). . [Chemical 1] 9. The stocking according to claim 1, wherein the 60% elongation recovery stress in the leg part knitted fabric of the stocking is 180 to 350 g. 10. A flat fiber cross-sectional shape which is composed of a polyamide containing substantially no titanium oxide and has a ratio (b / a) of major axis b to minor axis a of 2.0 to 6.0. A covering yarn is manufactured by winding a covering yarn composed of a plurality of long fibers around an elastic fiber to produce a covering elastic yarn, and producing at least a stocking by knitting at least the leg knitted fabric substantially only with the covering elastic yarn. A method for manufacturing stockings, which is characterized in that 11. The method of manufacturing a stocking according to claim 10, wherein the polyamide constituting the long fiber of the covering yarn is nylon 6. 12. The method for producing stockings according to claim 10, wherein the covering yarn has a low entanglement of 5 entangles / m or less or a low twist of 14 t / m or less.