JPH08134701A - Stockings - Google Patents

Abstract

PURPOSE: To provide stockings having good transparent feeling, refreshness, gloss and touch, etc., and excellent appearance of the texture, soft feeling, wearing comfortableness, fittability, durability, etc. CONSTITUTION: A sack stocking is produced by knitting a leg part exclusively with covered elastic yarn. The covering yarn of the covered elastic yarn is polyamide filament yarn having tetragonal cross section with four protruded parts, free from dent part and composed of four curved sides bulged outward from each side of an inscribed tetragon having the protrusions as the apices. Preferably, the yarn is single covered elastic yarn or double covered elastic yarn having a yarn fineness of 5-12de, a filament number of 2-7 and a covering twist number of 2200-2800t/m and essentially free from titanium oxide. A stocking product having excellent wearing fitness, fashionability, comfortableness and durability can be produced by using the yarn.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, the pantyhose has changed remarkably, and a pantyhose using a conventional false twisted nylon thread has been replaced with a "support" pantyhose using a covering elastic thread formed by winding a nylon thread around a polyurethane elastic thread. Is rapidly shifting to. This “support”
Pantyhose has been well received in the market because it has excellent fitability due to stretch recovery of polyurethane elastic yarn and 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.

Since the covering elastic yarn has a structure in which a nylon yarn is wrapped around a polyurethane elastic yarn to cover it, it tends to have a large fineness and is inferior in transparency and peeling compared with the conventional stocking made of false twisted yarn or composite fiber. However, it has disadvantages such as thick fabric. This disadvantage is further aggravated when the zocchi stockings are used, and in addition, the zocchi stockings have a great problem that the gloss is lost and the uniformity of the fabric is deteriorated and the flatness is inferior.

Therefore, in order to improve the problems (transparency failure, uneven feeling, feeling of material thickness) due to the thickness and structure of these covering elastic yarns, the covering yarns are made finer or the covering twists are made. It is required to reduce the number.

[0006] However, if the covering yarn is made finer, it causes a practically unfavorable problem that the durability of the stocking is deteriorated, and if the number of covering twists is reduced, the durability and transparency of the stocking are deteriorated. Since it causes a problem that is not preferable for practical use, it is not an effective improvement measure, and further improvement has been desired.

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, a non-circular shape having a sectional shape factor of 1.20 to 1.60 (Y-shaped, T-shaped, X-shaped, U-shaped, H-shaped, L-shaped, E-shaped) It is possible to wind a long fiber having a cross section of 5 around a polyurethane elastic yarn using a covering yarn.
No. 65 publication.

As a technique for improving the aesthetics and durability of stockings, a high-strength polyamide yarn having a multileaf (three-lobed, five-lobed) cross section with a degree of irregularity of 1.03 to 1.15. It has been proposed in Japanese Patent Application Laid-Open No. 2-80635 to wind a polyurethane elastic yarn with a covering yarn.

[0010]

However, since the above-mentioned long fibers having a non-circular cross section have considerable irregularities in the cross-sectional shape of the fiber, the resulting stocking has a transparent, glossy, flat appearance. It has a big problem that the feeling, touch, etc. are significantly deteriorated.

Therefore, even if these conventional techniques are applied to Zokki stockings, it is difficult to sufficiently improve the transparency, wearing comfort, flatness, luster, touch and material thickness.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and in a zocchi stocking substantially knitted with only covering elastic yarns, a transparent feeling, a flat feeling,
By improving gloss, touch, fabric thickness, and wearing comfort, it has excellent transparency, flatness, touch, gloss and wearing comfort that were not possible with conventional Zocchi stocking technology. The main purpose is to obtain Zokichi stockings with good properties and durability.

[0013]

In order to achieve this object, the present invention provides that at least the leg part knitted fabric is substantially
In a stocking in which polyamide long fibers are wound around a core yarn made of elastic fibers and knitted only with elastic yarn, the fiber cross-sectional shape of the polyamide long fibers has four protrusions. A quadrilateral that does not have a concave portion, and is a convex quadrilateral (hereinafter, referred to as It is simply called a convex quadrilateral).

As described above, according to the present invention, in a Zokki stocking in which at least the leg portion knitted fabric is substantially composed of only covering elastic yarn, the covering elastic yarn of the covering elastic yarn is crossed with the above-mentioned specific convex quadrilateral. Since it uses polyamide long fibers on the surface, it has excellent properties not obtained with conventional Zocky stockings, for example, extremely good transparency, gloss, refreshing feeling, fabric appearance, soft feeling, sliding feeling, fitability, etc. Therefore, it is possible to provide excellent wearing comfort and high fashionability.

That is, according to the present invention, the uniformity and transparency of the covering elastic yarn are improved, and the transparency, luster, touch and fabric appearance of the stocking knitted fabric are improved. In addition, the adhesion with the elastic yarn of the core at the time of covering, the covering property is improved, the floating of the covering yarn, which is likely to occur when a conventional round cross-section yarn is used, is reduced, and the fabric appearance and feel are improved. Further, the exposure of the elastic yarn of the core is reduced and the durability is improved.

Further, the coefficient of friction of the leg portion and its variation can be set to a low level which cannot be obtained by the conventional Zocky stockings, and as a result, the feeling of slipping during wearing is excellent and the feeling of roughness during wearing is small. You can get stockings with excellent touch.

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 stockings, the cloth appearance is deteriorated due to the shrinkage of the cloth, but in the present invention, the polyamide long fiber having the specific convex quadrangular cross section is used for the covering thread. In addition, the covering property is uniform, the elastic yarn of the core is less exposed, the uneven shrinkage of the knitted fabric is suppressed, the deterioration of the appearance of the fabric can be prevented, and the process passability in the knitting or finishing process can be improved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The stockings targeted by the present invention are stocking products represented by pantyhose, long stockings and short stockings.

FIG. 2A 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. 2B 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 yarns, 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. Further, the portion other than the leg portion (for example, the panty portion) may be knitted with the same covering elastic yarn as that of the leg portion.

On the other hand, even in a knitting stocking in which covering elastic yarns and nylon raw yarns are alternately knitted, the effect of improving glossiness 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 a stocking, which is the object of the present invention, has a small effect and has a good fit property, a feeling, a touch feeling, and a good texture without any knitting.

The covering elastic yarn may be a single covering elastic yarn (SCY) in which a covering yarn is wound around the elastic fiber yarn in a single layer, or a covering yarn may be provided around the elastic fiber yarn. A double covering elastic yarn (DCY) may be formed by double winding with different winding directions, but it is particularly a single covering elastic yarn that improves the transparency of the stocking and improves the fabric thickness and the feeling of unevenness. It is preferable in terms of improvement.

The covering elastic yarn used in the present invention is such that the covering yarn is made of polyamide substantially free of titanium oxide, and the fiber cross-sectional shape is substantially concave with four protrusions. Which is a quadrilateral without a convex quadrilateral, which is a convex quadrilateral composed of four curved sides that project substantially outwardly from each side of an inscribed quadrangle having the protrusion as a vertex. It is important to be done.

The polyamide long fibers may be ordinary polyamide fibers such as nylon 6 fibers, nylon 66 fibers, nylon 46 fibers, etc. Among them, nylon 6 fibers which are particularly excellent in transparency and glossiness are the fibers themselves. It is preferable as a covering thread for zocchi stockings in which transparency and glossiness are particularly important.

The polyamide is preferably a polyamide consisting essentially of any one of polymer units such as nylon 6, nylon 66 and nylon 46, but it does not impair its mechanical properties and transparency. Other polymer units may be copolymerized in a small amount such as about 3 mol% or less. 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.

In addition, 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 a polymerization degree of 2.5 to 3.5, and particularly 2.6 to 3.3.

If necessary, the polyamide may contain 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, it is preferable that the matting agents and pigments typified by titanium oxide are not substantially contained in order to further improve the transparency, touch, color vividness, durability and the like of the Zocky stockings.

Titanium oxide is generally blended as a matting agent in polyamide fibers for socks, and especially 3
In the case of a fiber having a non-circular cross section such as a leaf (Y-shaped) cross section or a five-lobed cross section, the feeling of flicker on the fiber surface is large, and it has been considered essential to mix titanium oxide in order to suppress the feeling of flicker. However, when the convex quadrangular cross-section fiber specified in the present invention is used for the covering yarn, the problem of flicker does not occur even if titanium oxide is not contained, and rather, titanium oxide that does not substantially contain titanium oxide is used. However, it is effective for improving the transparency, color vividness, strength and the like of the stockings, and it is preferable that titanium oxide is not substantially contained.

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, it is preferable in order to further improve the transparency, color vividness, durability, soft feeling, etc. of the stockings, reduce the feeling of roughness due to the unevenness of the knitted ground, and further improve the soft feeling.

[0031]

Embedded image

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 filaments forming the covering yarn used in the present invention are quadrilaterals having four protrusions and substantially no recesses, and inscribed quadrangles having the protrusions as apexes. Has a convex quadrangle that is composed of four curved sides that project substantially outwardly from each side of the. Further, this convex quadrilateral is a quadrilateral composed of four curved sides, and the four curved sides are formed so as to protrude substantially outward from the center of the quadrilateral and have substantially no concave portions. It can also be expressed as a shape that does not have.

This convex quadrilateral is represented by the shapes shown in FIGS. 1 and 3 (a). FIG. 1 is a diagram schematically showing a typical example of this convex quadrilateral. FIG. 3 is a cross-sectional view of a single yarn of the covering yarn in the example, (a) is the case of the present invention, and the other cases are outside the present invention.

In FIG. 1, 1 is a fiber cross-sectional shape, 2
(Dashed line) indicates the circumscribed circle, and 3 (dashed line) indicates the inscribed quadrangle. This fiber cross-sectional shape 1 has four protrusions 4,
4 '... and the curved sides 5, 5' .., connecting the adjacent protrusions 4, 4'to each other, are the sides of the inscribed quadrangle 3 with the protrusions 4, 4 '.. It projects substantially outwardly in a convex shape.

.. are always inscribed squares 3.
Is substantially convex to the outside of the side, and there is substantially no concave portion in the middle of the curved sides 5, 5 '... That is, the outer contour of the fiber cross-sectional shape 1 exists in the middle of the inscribed quadrangle 3 and the circumscribed circle 2, and virtually any part is convex outward.

On the other hand, if the curved sides 5, 5 '... Protrude outside the circumscribed circle 2 or enter the inside of the inscribed quadrangle 3, the corner portions of the inscribed quadrangle 3 will be described. Since a concave portion is formed in (the portion corresponding to the protruding portion 4, 4 '...) Or in the middle of the curved sides 5, 5' .., it is difficult to obtain the fiber cross-sectional shape specified in the present invention.

In order to make the above-mentioned outward convex state, in the case of FIG. 1 in which the circumscribed circle is a true circle and the inscribed quadrangle is a square, the distance a from the center of the circumscribed circle 3 to the protrusion 4 is The value of the distance b from the center of the circumscribed circle 3 to the center of the curved side 5 (b /
It is preferable that a) is 0.80 to 0.96.

It is to be noted that "having substantially no recesses" means that conditions are not set so that recesses are formed in the fiber cross-sectional shape, and they occur unintentionally during the fiber manufacturing / processing step. Occasionally, there may be a small amount of microscopic depressions as long as the intended purpose of the present invention is achieved.

In addition to the shape shown in FIG. 1, the convex quadrilateral specified in the present invention is such that the circumscribed circle is a substantially circular shape and the inscribed quadrilateral is a rectangle or a parallelogram if the shape conditions specified in the present invention are satisfied. The shape may be a quadrangle, but in order to make the effects such as transparency, slippage, and luster more remarkable, it is preferable that the inscribed quadrangle has two opposite sides substantially parallel to each other. In particular, a square, a rectangle or a shape close to it is preferable.

The line segments B1 and B2 connecting the centers of the opposite curved sides 5 and 5'are preferably 1/2 <B1 / B2 <2/1, and further 1 / 1.5≤B1 /. B2 ≦ 1.
It is preferably 5/1.

A fiber having a convex quadrilateral cross section is superior to a round cross section fiber in terms of transparency, gloss, slippage and the like. However, this effect cannot be obtained with a fiber having an irregular cross section with a recess, such as a normal four-lobed or trilobal fiber.

By using this convex four-sided cross-section fiber for the covering yarn, the Zokki stockings have improved transparency, luster, coolness, and cloth appearance. When covering with convex four-sided cross-section fibers, the single yarn arrangement at the time of covering is likely to be a single-step arrangement around the core yarn, and in combination with the convex four-sided cross section having no recesses, a particularly transparent feeling, Greatly improves gloss, touch, etc., and is far superior to conventional Zokki stockings in terms of transparency, gloss, and touch, while degrading other characteristics such as durability and fit required for stockings. You can get without.

On the other hand, when a fiber having a modified cross section having a recess, such as a normal four-lobed shape or a trilobal shape, is used for the covering yarn, the presence of the recess in the fiber cross section deteriorates the transparency of the stocking. However, since the glitter or roughness due to reflection occurs and the gloss feeling deteriorates and the soft feeling deteriorates, the intended object of the present invention cannot be achieved. Further, in the trilobal shape or the pentalobal cross-sectional shape, as in the case of the round cross-section fiber, the single yarn arrangement at the time of covering is likely to be a multi-step arrangement such as a two-step arrangement around the core thread, and moreover, the covering elastic thread Since the unevenness on the surface becomes large, the intended purpose of the present invention cannot be achieved.

The polyamide fiber having a convex four-sided cross section specified in the present invention can be obtained by a usual method of obtaining a desired cross-sectional shape by controlling the shape of the discharge hole of the spinneret and the degree of polymerization of the polymer used. For example, it can be obtained by melt-spinning polyamide from a spinneret having a cross-shaped slit and controlling the polymer polymerization degree (relative viscosity) and the slit size at that time. Generally, the ratio of slit foot length / slit width is 1 or less is preferable. Further, the polyamide fiber having a convex four-sided cross section specified in the present invention has a density of 1.129 to 1.132.
g / cm ³ , initial tensile resistance is 28.0 to 40.0 g /
d, boiling water shrinkage is 12 to 15%, and strength is 6.0 g
/ D or more, and further, having an elongation of 45% or less is preferable in order to further improve transparency, softness, appearance of cloth, durability and the like.

The initial tensile resistance is 2 as in low speed spun undrawn yarn and high speed spun undrawn yarn (so-called POY).
When it is less than 8.0 g / d, which is too low, the stitch shape in the knitting fabric of the zocchi stocking tends to be loose and the appearance of the fabric tends to be deteriorated, which is not preferable. On the contrary, when the initial tensile resistance is too high such that it exceeds 40.0 g / d, as in the case of a drawn yarn obtained by drawing a low-speed spun undrawn yarn at a high ratio, the transparency in the knitting fabric of the Zokki stocking is high. It is not preferable in terms of softness and softness.

When the boiling water shrinkage ratio is too high at 15% or more like the drawn yarn obtained by drawing the unspun yarn spun at a low speed at a high ratio, the shrinkage in the heat treatment process such as dyeing is too large. Due to the strong tightening of the attached polyamide yarn, the elastic yarn for covering itself tends to become rigid and the softness of the fabric is further impaired, and defects such as roughening and streaks in the formation of stitches of the fabric are likely to occur, which is not preferable.

The values of the initial tensile resistance, strength and elongation described above were measured by a Tensilon tensile tester for a fiber sample left in a free shrink state in an atmosphere of 20 ° C. and 65% RH.
Initial load 1/30 g / d, sample length 50 cm, pulling speed 5
It is a value obtained by drawing an extension-load curve (SS curve) measured under the condition of 0 cm / min. The initial tensile resistance is a value obtained by drawing a tangent line having the highest gradient at the rising portion of the SS curve and multiplying the stress value at 10% elongation by 100/10. .

Polyamide fibers having a convex four-sided cross-section having the above-mentioned physical property values are taken out after cooling the melt-spun yarn, followed by drawing at 3.0 times or less, heat treatment at 150 ° C. or more, and 3500 m / It can be produced by a high-speed direct spinning / drawing method in which the film is wound for not less than a minute.

The above-mentioned polyamide fiber can be represented by a fiber structure with a density of 1.290 to 1.320 g / cm ^{3. The} polyamide fiber having a convex quadrangular cross section has physical properties. It is difficult to obtain by other spinning methods, such as the spinning method (not drawn) and the slow spinning-high draw ratio method.

The yarn fineness of the covering yarn used in the present invention is 5 to 12 denier, particularly 5 to 10 denier when used for single covering, and 5 to 10 denier when used for double covering. It is preferable to further improve the transparency and to obtain excellent durability and wearing feeling. If the yarn fineness is too thin, the practical durability tends to be insufficient, and conversely, if the yarn fineness is too thick, the transparency tends to be insufficient and the texture tends to be coarse and hard, which is not preferable.

A multifilament yarn having a filament number of 2 to 7 is preferable in order to further improve the transparency, the feeling of wearing and the durability. On the other hand, when the number of filaments is 1, the texture tends to be rough and hard and the durability tends to be insufficient, and conversely, when the number is 8 or more, the transparency and the durability tend to be insufficient, which is not preferable.

As the elastic yarn forming the core yarn of the covering elastic yarn, 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 polyurethane elastic body may be obtained by any one of dry spinning, melt spinning and wet spinning methods.

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.

The covering elastic yarn used in the present invention is a covering yarn composed of a plurality of fibers having a specific convex quadrilateral cross section, which is made of polyamide containing substantially no titanium oxide, and is usually formed around the elastic fiber. It may be manufactured by wrapping it in single or double by the method of.

The number of covering twists for winding the polyamide continuous fiber yarn around the core yarn made of elastic fiber varies depending on whether the winding is single or double, but the number of covering twists for single covering is 2200 to 2800t. / M is preferable in order to further improve the feel of the stocking, the durability, the appearance of the cloth, and the like. Less than 2200 t / m (same level as conventional single covering elastic yarn)
Although good stockings can be obtained, 2200 t / m or more is preferable from the viewpoint of the appearance of the fabric and the durability when the covering yarn is made finer. On the other hand, when it exceeds 2800 t / m, the skin feel, transparency,
Although it has good durability, it is not preferable because the appearance and durability of the fabric are likely to be impaired in terms of the torque due to the covering twist and the hardness of the covering elastic yarn itself. Touch, durability,
In order to obtain a good Zokki stocking in terms of transparency, appearance of the fabric, etc., the covering twist of the single covering elastic yarn is preferably 2300 to 2700 t / m.

In the case of double covering, it is also preferable that the number of covering twists of the lower winding is 2200 to 2800 t / m.

The leg portion knitted fabric made only of the covering elastic yarn may be knitted by a usual 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 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 preferred.

In order to bring the 60% BP to the above-mentioned level, it is particularly effective to optimize the elastic recovery characteristics of the elastic yarn of the core, and the conditions of the yarn constitution, 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, wet spinning method, etc.), its yarn fineness, knitting design of stockings (number of needles, stitches, etc.), its heat setting conditions (finish template size) , Temperature, etc.).

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).

[0065]

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

Transparency: A stocking product was put on a human foot, and the leg knitted fabric worn on the thigh was sampled to obtain a color standard white plate (L value 88.2).
9) L value (Lw) of the knitted fabric when left on top, and the color standard blackboard (L value 7.74). The L value (Lb) of the knitted fabric at the time of standing is measured by a color difference meter Σ80 (manufactured by Nippon Denshoku Industries Co., Ltd.). And those L
The transparency is calculated from the value 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: The stocking product was put on the human foot shape, and the inspector (5 persons) relatively evaluated the softness of the texture, the refreshing sensation, and the sliding sensation. The result was ⊚: extremely Good, ○: Good, △: Slightly bad, ×:
Defects are shown as criteria.

Durability: The burst strength was measured by the burst strength test method using a JIS P-8131 Murren high pressure tester, and the burst strength was indicated by 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 1.
Less than 0 kg / cm ² , x: less than 0.9 kg / cm ² .

Glossiness, Appearance of the Fabric: It is a relative evaluation by the naked eye of an inspector (5 persons), and the result is 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 repeatedly for 3 days, and the results are shown by the same criteria as the above tactile sensation.

Friction characteristics: KES friction characteristics are measured in the warp direction of the knitted fabric, and expressed by the friction coefficient (MIU) and friction coefficient variation (MMD).

Wearing comfort (during midsummer): In order to evaluate wearing comfort under the environmental conditions of midsummer, four test subjects wearing stockings move up and down the platform for 20 minutes in a room at 30 ° C. and 65% RH. The test subject evaluated the wearing comfort from the discomfort at that time, and the results are shown by the same criteria as the above tactile sensation.

[Example 1] 98% sulfuric acid relative viscosity 2.7
Nylon 6 containing no titanium oxide was melted at 270 ° C and the slit width was 0.1 mm and the slit leg length was 0.07 m.
It was discharged from a spinneret having a cross-shaped discharge hole different from m or 0.2 mm, cooled, oiled, and wound at 800 m / min as an undrawn yarn. Continued elongation is 4
It was stretched to 0 to 45% to obtain nylon 6 yarns of 10 denier 5 filaments having different fiber cross-sectional shapes as shown in FIGS. 3 (a) and 3 (b) (Nos. 1 and 2).

By way of comparison, except that the Y-shaped discharge hole or the circular discharge hole was used, melt spinning and drawing were carried out in the same manner as in No. 1 above, and 10 denier of the trilobal cross section or the round cross section of FIG. 6 filaments of nylon with 5 filaments were obtained (No. 3,
4).

Furthermore, except that the content of titanium oxide was 0.35% by weight, melt spinning and drawing were carried out in the same manner as in the above No. 1 to obtain a nylon 6 yarn of 10 denier 5 filaments having a convex quadrilateral cross section (No. 5 ).

The cross-sectional shape factors (b / a) of No. 1 and No. 2 nylon 6 yarns were 0.91 and 0.62, respectively.

In addition, the cross-sectional deformation degree (= radius of inscribed circle / radius of inscribed circle) of No. 3 nylon 6 yarn (trilobal cross section)
Was 1.6.

These nylon 6 yarns (twist number 12 t /
m) is used as the covering thread, and 20 denier polyether polyurethane elastic fiber (spandex) is used as the core thread, the draft of the core thread is 3.1 times, and the covering twist number is 230.
Single covering was performed in the S direction or the Z direction at 0 t / m to produce an S direction single covering elastic yarn and a Z direction single covering elastic yarn.

Using the obtained single covering elastic yarn, Super 4 knitting machine manufactured by Nagata Seiki Co., Ltd.
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 evaluation results of the leg parts of the obtained panty hose products.

[0081]

[Table 1]

As can be seen from the results shown in Table 1, the pantyhose of the present invention (Nos. 1 and 5) have a soft feeling,
All the characteristics such as refreshing feeling, sliding feeling, luster feeling and durability were excellent. In particular, in the case of No. 1 containing no titanium oxide, the transparency and the like were particularly excellent, and it was the most excellent.

On the other hand, in the case of a four-lobed cross section having a recess (a concave quadrilateral) (No. 2), in the case of a three-lobed cross section (No. 3),
In the case of the round cross section (No. 4), the transparency, touch and gloss were inferior. In particular, in the case of the round cross section, the refreshing feeling was inferior and the feeling of unevenness was felt.

[Example 2] 98% sulfuric acid relative viscosity was 2.8.
Nylon 6 containing no titanium oxide was melted at 270 ° C and the slit width was 0.1 mm and the slit leg length was 0.07 m.
Discharge from a spinneret having cross-shaped discharge holes of m or 0.2 mm, cooling and oiling, 2100 m /
The first godet roller was taken in a minute, and the elongation was 40%.
Stretched 1.8 times to ~ 45%, then 160 ℃
After heat treatment with a second godet roller of No. 6 and winding at 4000 m / min, a nylon 6 yarn of 7 denier 5 filaments having a fiber cross-sectional shape of FIG. 3 (a) was obtained (No. 6).

By way of comparison, except that the Y-shaped discharge hole or the circular discharge hole was used, melt spinning and drawing were performed in the same manner as in No. 1 above, and 7 denier of the trilobal cross section or the round cross section of FIG. We obtained 6 filaments of nylon with 5 filaments (No. 7,
8).

Further, except that the content of titanium oxide was 0.35% by weight, melt spinning and drawing were carried out in the same manner as in No. 1 to obtain a nylon 6 yarn of 7 denier 5 filaments having a convex quadrilateral cross section (No. 9). ).

The cross-sectional shape factor (b / a) of No. 6 nylon 6 yarn was 0.93, respectively. Also,
The cross-sectional deformation degree (= circumscribed circle radius / inscribed circle radius) of No. 8 nylon 6 yarn (trilobal cross section) was 1.8.

These nylon 6 yarns (twist number 12 t /
m) is used as the covering thread, and 20 denier polyether polyurethane elastic fiber (spandex) is used as the core thread, the draft of the core thread is 3.1 times, and the covering twist number is 230.
Single covering was performed in the S direction or the Z direction at 0 t / m to produce an S direction single covering elastic yarn and a Z direction single covering elastic yarn.

Using the obtained single covering elastic yarn, Super 4 knitting machine (needle number 440) manufactured by Nagata Seiki Co., Ltd.
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 2 shows the evaluation results of the leg parts of the obtained pantyhose products.

[0091]

[Table 2]

As can be seen from the results shown in Table 2, the pantyhose of the present invention (Nos. 6 and 9) have a soft feeling,
All the characteristics such as refreshing feeling, sliding feeling, luster feeling and durability were excellent. In particular, in the case of No. 6 which did not contain titanium oxide, the transparency and the like were particularly excellent and it was the most excellent.

On the other hand, in the case of the trilobal cross section (No. 7),
In the case of the round cross section (No. 8), the transparency, touch and gloss were inferior. In particular, in the case of the round cross section, the refreshing feeling was inferior and the feeling of unevenness was felt.

[Example 3] Nylon 6 yarn of No. 1 obtained in Example 1 and No. 6 obtained in Example 2
Nylon 6 yarns 7 and 8 were used as covering yarns.

Further, in the same manner as in Example 2, after melt spinning, cooling and oil feeding, 4500 was performed without stretching or heat treatment.
The fiber was wound at m / min, and the cross-sectional shape of the fiber was 6 in Fig. 3 (a).
A nylon 6 yarn of 7% denier 5 filaments of 2% was obtained (No. 10). The cross-sectional shape factor (b / a) of this nylon 6 yarn was 0.92.

Further, similarly, high speed spinning was performed and wound up to obtain nylon 6 yarn of 7 denier 5 filaments having a circular cross section and an elongation of 65% (No. 11).

These Nos. 1, 6, 7, 8, 10 and 11
Nylon 6 yarn is used as a covering yarn, and 20 denier polyester-based polyurethane elastic fiber (spandex) is used as the core yarn, and the draft of the core yarn is 2.9 times and the covering twist number is 2300 t / m in the S direction or Z direction. Single covering was performed to produce an S-direction single covering elastic yarn and a Z-direction single covering elastic yarn.

Using the obtained single covering elastic yarn, panty hose products were manufactured in the same manner as in Examples 1 and 2, and the results of evaluation of the leg parts are shown in Table 3.

[0099]

[Table 3]

As can be seen from the results shown in Table 3, in the case of No. 6 according to claims 5 and 6, the transparency, the appearance of the cloth, the softness, and the durability were all particularly excellent.

Example 4 The No. 1 nylon 6 yarn of Example 1 was used as the covering yarn, and 15 denier polyether polyurethane elastic fiber (spandex) was used as the core yarn, and the draft of the core yarn was 2.9. Double, covering twist 190
A single covering elastic yarn was manufactured by single covering at 0, 2300, 2600, and 2900 t / m.
(No. 12 to 15) Nylon 6 containing 98% sulfuric acid relative viscosity 2.7 containing 0.5% by weight of ethylenebisstearylamide (EBA) containing no titanium oxide was used. Of N
Melt spinning and stretching were carried out in the same manner as in o.1 to obtain nylon 6 yarns of 10 denier 5 filaments having a convex quadrilateral cross section. This nylon 6 yarn is used as the covering yarn and the covering twist is 26
No. 00, a single covering elastic yarn was manufactured by covering in the same manner as above. (No. 16) The obtained single covering elastic yarns were used in Example 1 respectively.
It was evaluated as a pantyhose product in the same manner as in. The results are shown in Table 4.

[0102]

[Table 4]

As can be seen from the results shown in Table 4, all of the obtained pantyhose were excellent in all of the appearance of the dough, the soft feeling, the refreshing feeling, the sliding feeling and the like. Among them, when the covering twist number was 2300 and 2600 t / m (Nos. 13, 14, and 16), the fabric appearance, softness, refreshing feeling, and sliding feeling were extremely good. These characteristics were also shown by the fact that both the coefficient of friction and the fluctuation of the coefficient of friction were small, and the slipperiness was good and the texture was smooth.

Further, when the fiber containing the acid amide compound specified in the present invention was used (No. 16), the transparency and the like were particularly excellent.

[Example 5] Nylon 6 yarn of No. 1 of Example 1 was used as a covering yarn, 10, 15, 20, 3
With 0 denier polyether polyurethane elastic fiber (spandex) as the core yarn, the draft of the core yarn is set to 3.0, 2.8, 2.8 and 2.6 times, respectively, and the covering twist number is 2500 t / m. As a single covering elastic yarn (No. 17 to 2)
0).

Each of the obtained single covering elastic yarns was manufactured and evaluated in the same manner as in Example 1 to produce a pantyhose product. The results are shown in Table 5.

[0107]

[Table 5]

As can be seen from the results shown in Table 5, all pantyhose stockings had excellent characteristics. Among them, the 60% recovery stress (BP) of stockings is
In the range of 180-350g (No.17-19)
Had good wearing comfort under the environmental conditions of midsummer.

[Example 6] The nylon 6 yarn of No. 1 of Example 2 was used as a covering yarn, and 15 denier polyether polyurethane elastic fiber (spandex) was used as the core yarn, and the drafts of the core yarns were prepared. Set to 3.0 times,
Lower wrapping is covering in the S direction with a covering twist of 2000 t / m, and upper wrapping is a covering twist of 2300 t / m.
Double covering was performed as the Z direction covering of No. 21 to produce a double covering elastic yarn (No. 21).

Using the obtained double covering elastic yarn,
Super 4 knitting machine (400 needles) manufactured by Nagata Seiki Co., Ltd.
Then, the leg portion knitted fabric was a panty hose in which only covering elastic yarns were knitted, and a panty hose product was manufactured and evaluated in the same manner as in Example 1. The results are shown below, and it was a stocking having excellent properties.

Sliding feeling: ◎, Gloss feeling: ◎, Soft feeling:
○, Coolness: ○, Durability: ◎, Fit: ◎

[0112]

INDUSTRIAL APPLICABILITY The stocking made of the covering elastic yarn of the present invention improves the transparency, luster and tactile feel of the entire knitted fabric, has an extremely soft feel, and is excellent in tactile feel such as slipperiness and coolness. In addition, excellent effects can be obtained on the fabric appearance, fit, durability, and wearing comfort, and an extremely good stocking product can be obtained.

Therefore, a stocking product excellent in fit, fashionability, comfort and durability when worn can be obtained.

[Brief description of drawings]

FIG. 1 is a fiber transverse cross-sectional view that schematically shows a typical example of the fiber cross-sectional shape of a polyamide long fiber having a convex four-sided cross section that constitutes a covering yarn of a covering elastic yarn.

FIG. 2 is a front view illustrating a stocking as a target of the present invention, in which (a) illustrates long stockings and (b) illustrates panty stockings.

FIG. 3 is a fiber cross-sectional view showing a fiber cross-sectional shape of a covering yarn used in Examples. (A) is the case of this invention, (b)-(d) is the case of this invention.

[Explanation of symbols]

1: Fiber cross-sectional shape of convex four sides, 2: Its circumscribed circle,
3: The inscribed quadrangle, 4, 4 '...: Protrusion, 5,
5 ′ ··: curved side, a: distance from the center of the circumscribing circle 3 to the protrusion 4, b: distance from the center of the circumscribing circle 3 to the center of the curved side 5, 13: leg part

Claims (15)

[Claims] 1. A stocking in which at least the leg knitted fabric is knitted only with covering elastic yarns in which polyamide long fibers are substantially wound around a core yarn made of elastic fibers. Is a quadrilateral having four protrusions and substantially no recesses, and is substantially convex outside each side of an inscribed quadrangle having the protrusions as vertices. Stocking characterized by being a convex quadrilateral composed of four curved sides overhanging. 2. The ratio (B1 / B2) of the lengths of line segments B1 and B2 connecting the centers of the two opposite curved sides of the convex quadrangle is 1
The stocking according to claim 1, wherein / 2 <B1 / B2 <2/1. 3. The shape of the inscribed quadrangle of the convex quadrilateral is
Stocking according to claim 1 or 2, characterized in that it is substantially rectangular or square. 4. The stocking according to claim 1, wherein the polyamide filaments are made of polyamide substantially free of titanium oxide. 5. The polyamide filaments have a density of 1.1.
29 to 1.132 g / cm ³ , initial tensile resistance 28.0
~ 40.0 g / d, boiling water shrinkage 12-15%, and
The stocking according to claim 1, which has a strength of 6.0 g / d or more. 6. The high-speed direct polyamide filament fibers are drawn after cooling the melt-spun fibers, followed by drawing at 3.0 times or less, heat treatment at 150 ° C. or more, and winding at 3500 m / min or more. The stocking according to claim 1, which is a polyamide long fiber produced by a spinning and drawing method. 7. The stocking according to claim 1, wherein the covering elastic yarn is a single covering elastic yarn in which a covering long fiber yarn is wound around a core yarn made of elastic fiber in a single layer. 8. The stocking according to claim 7, wherein the number of covering twists of the long fiber yarn for covering is about 2200 to 2800 t / m. 9. The covering yarn has a yarn fineness of 5 to 5.
The stocking according to claim 7, which has 12 denier and 2 to 7 filaments. 10. The stocking according to claim 1, wherein the covering elastic yarn is a double covering elastic yarn in which a covering long fiber yarn is doubly wound around a core yarn made of an elastic fiber. . 11. The stocking according to claim 10, wherein the number of covering twists of the underwound long fiber yarn for covering is 2200 to 2800 t / m. 12. The stocking according to claim 10, wherein the long fiber yarn for covering has a yarn fineness of 5 to 10 denier and a filament number of 2 to 7. 13. The stocking according to claim 1, wherein the polyamide constituting the long fiber yarn for covering is nylon 6. 14. The polyamide constituting the long fiber yarn for covering is 0.01 to 1.0 with respect to the polyamide.
The 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). Embedded image 15. 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.