JP2003293202A - Stocking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide stockings excellent in cool contact feeling and an ultraviolet light-screening property, and bringing about the stable production of fine polyamide fibers which are used for stockings and contain much titanium oxide. <P>SOLUTION: The stockings have the following structure: a core yarn comprises elastic fibers; polyamide filament yarns are wound around the core yarn; the leg parts of the stockings are knitted with covering elastic yarns and interknitting polyamide filament yarns alternately in every course. The polyamide filament yarn contains 1-7 wt.% of titanium oxide and 0.01-1 wt.% of a magnesium compound, and has 11-27 decitex yarn fineness, 3-8 decitex single filament fineness, and 4×10<SP>-5</SP>-7×10<SP>-5</SP>mol/g of the amino terminal group amount. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in stockings, and more particularly to a stocking having good soft texture, cool touch feeling, and ultraviolet ray shielding property.

[0002]

2. Description of the Related Art Conventionally, sun-tanned, skin-colored skin has been regarded as a symbol of health, but in recent years, the influence of ultraviolet rays on the human body has been widely taken up and interest in ultraviolet ray shielding has been increasing.

Ultraviolet rays in sunlight are A waves (320 to 40).
0 nm), B wave (290 to 320 nm), C wave (200
~ 290 nm), especially A wave has high skin permeability and causes spots and freckles, and B wave has a great effect on the human body by causing inflammation and a kind of burn. It has been introduced on TV and TV. In each case, women's interest in UV screening is increasing.

[0004] Therefore, in order to protect the skin from ultraviolet rays, not only is the sun shade shielded from sunlight by a parasol or hat, but
It is common practice to apply cosmetics that have an ultraviolet blocking effect to the face, neck, arms, etc.

However, no measures are taken to protect the legs from the sun, and the legs may be exposed to ultraviolet rays through the stocking material to cause sunburn. Therefore,
It is possible to wear thick stockings or pants to prevent sunburn of the legs, but it is not practical to wear such thick stockings in summer when the sun is strong.

In recent years, changes in the living environment of women and rising fashion thinking have brought about changes in the required characteristics of stockings. In particular, recently, as the required characteristics of stockings worn in summer, there are increasing demands for ultraviolet ray shielding properties and cool contact feeling.

As a technique for blocking ultraviolet rays, a technique relating to a post-processed product in which microcapsules containing an ultraviolet absorber are adhered to a fiber with a binder on the whole surface is disclosed in Japanese Patent Publication No. 7-11081.
Japanese Patent Laid-Open No. 9-31672.
Japanese Unexamined Patent Publication No. 8 proposes a composite fiber composed of a polyamide fiber containing fine particles of titanium oxide forming an ultraviolet shielding layer and a transparent polyamide layer containing substantially no light scattering substance.

However, in the post-processed article disclosed in Japanese Patent Publication No. 7-11081, there is a decrease in the UV shielding effect due to repeated washing, there is a risk of skin damage due to insufficient washing during post-processing, and Problems such as hard texture occur. On the other hand, the composite fiber disclosed in Japanese Patent Application Laid-Open No. 9-316728 has an ultraviolet shielding effect, but when a polyamide fiber having a fineness and a high titanium oxide content used for stocking is produced, titanium oxide is melted. Bleeds out around the mouth hole and forms foreign matter around the mouth hole, which is a major obstacle in stabilizing production and improving productivity.

Therefore, for example, Japanese Unexamined Patent Publication No. 8-231711
In Japanese Patent Laid-Open Publication No. JP-A-2003-242242, a method of limiting the amount of amino terminal groups or carboxyl terminal groups of polyamide to an extremely low level and controlling the content of low molecular weight components has been proposed for the purpose of reducing the contamination of the die of a molding apparatus.

[0010]

However, in the method described in Japanese Patent Application Laid-Open No. 8-231711, it is necessary to add a large amount of a terminal blocking agent such as monoamine and monocarboxylic acid, and in this case, it is necessary for molding. In order to obtain a polyamide with a degree of polymerization, it takes a long time for polymerization or special polymerization such as reduced pressure polymerization is required, which may cause quality deterioration due to thermal decomposition reaction. Solution was needed. Further, when the fiber is used, there is a problem that the color developability is extremely lowered.

In view of the above, the present invention aims to provide a stocking having a good cool contact feeling and a good ultraviolet ray shielding property, and at the same time, to provide stable production of a polyamide fiber having a high fineness and a high titanium oxide content for use in the stocking. To do.

[0012]

In order to solve the above problems, the present invention provides (1) a covering elastic yarn having an elastic fiber as a core yarn and a polyamide long fiber for covering wound around the core yarn, and a polyamide continuous fiber for interlacing. In a stocking in which the leg parts are alternately knitted for each course, the polyamide filament for interlacing contains 1 to 7% by weight of titanium oxide and 0.01 to 1% by weight of a magnesium compound, and the yarn Fineness of 11 to 27 decitex, fineness of single yarn of 3 to 8 decitex, and amount of amino end groups of 4 × 10 ^{−5 to} 7 × 10 ⁻⁵ mol /
Stocking characterized by being g.

(2) Covering Polyamide long fibers for covering constituting the elastic yarn contain 1 to 7% by weight of titanium oxide,
It contains 0.01 to 1% by weight of a magnesium compound, and has a filament fineness of 5 to 18 decitex, a single yarn fineness of 1 to 3 decitex, and an amino terminal group amount of 4 × 10 ^-5 .
The stocking according to (1), which has a ^{concentration of} 7 × 10 ⁻⁵ mol / g.

(3) The stocking according to (1) or (2), wherein the covering elastic yarn constituting the stocking is a single covering elastic yarn having a twist number of 1400 to 2500 t / m.

(4) The covering elastic yarn constituting the stocking has the number of lower twists of 1800 to 4000 t / m and the number of upper twists of 0.75 x (number of lower twists) to 0.95 x (number of lower twists) t / m. It is a double covering elastic yarn (1)
Or the stocking according to (2). It is composed of

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

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

In the stocking of the present invention, it is necessary to knit the knitted fabric of at least the leg portion of such stocking alternately with the covering elastic yarn and the polyamide continuous filament for interlacing every one course. The leg part knitted fabric may be provided with a braided pattern made of another material or a decoration such as one point.

The stocking of the present invention is knitted by a known manufacturing method. For example, a knitting machine having two or four yarns may be used for knitting by a usual method in which the covering elastic yarn and the polyamide continuous filament for knitting are supplied and knitted. In the case of the single covering elastic yarn, the S-covering single-covering elastic yarn and the Z-direction covering single-covering elastic yarn are alternately knitted. The leg portion knitted fabric may be knitted in this manner to obtain a stocking product by a known manufacturing method.

The polyamide continuous fiber for knitting used in the stocking of the present invention must contain 1 to 7% by weight of titanium oxide. When the content of titanium oxide is less than 1% by weight, sufficient effect of shielding ultraviolet rays, cool contact feeling, and soft feeling cannot be obtained. In addition, when the amount of titanium in the polyamide long fiber for covering is increased in order to supplement the ultraviolet ray shielding ability, the gloss feeling of the interlaced yarn and the dull feeling of the covering elastic yarn are unbalanced, and the appearance is not good. If it exceeds 7% by weight, UV shielding effect, contact cooling feeling, and soft feeling can be obtained, but additive cost and yarn breakage during production of polyamide continuous fiber for interlaced knitting increase, which is not preferable in terms of yarn stability. . More preferably, it is 1.5 to 6% by weight.

The titanium oxide may be any one used as an additive for polyamide. The type may be rutile type or anatase type, but the anatase type is more preferable in order to improve the ultraviolet shielding property. The particle size of titanium oxide may be in a range that does not cause problems such as increase in filtration pressure and yarn breakage during the production of polyamide continuous fiber for interlacing, but an average particle size of 1 μm or less is preferable. Further, in the case of a fine particle powder having an average particle diameter of, for example, 0.1 μm or less, it is not preferable from an economical point of view because the cost for pulverization and the like is increased, and also problems such as increase in filtration pressure are likely to occur. . More preferably, it is 0.1 to 0.5 μm or less. Further, the surface of the titanium oxide particles may be treated with Al, Zn, Si or the like for the purpose of improving the dispersibility of titanium oxide in the continuous polyamide filament.

Further, as a method of incorporating titanium oxide, a method of blending and melting titanium oxide into polyamide pellets, a method of blending and melting polyamide pellets with master pellets containing a high concentration of titanium oxide,
Examples include a method of adding titanium oxide to a molten polyamide and kneading, a method of adding titanium oxide to a raw material or a reaction system before or during polymerization of polyamide, but any method can be used as long as both are uniformly mixed. good.

The polyamide filament for interlacing used in the stocking of the present invention contains a magnesium compound in an amount of 0.01 to 1
It is necessary to contain it by weight%. When the content of the magnesium compound is less than 0.01% by weight, for example, it is not possible to sufficiently suppress the regeneration of the monomers and oligomers when producing the polyamide continuous fiber for knitting by melting,
Titanium oxide bleeding out from these monomers, oligomers and polyamides often causes yarn breakage due to contamination of the periphery of the molding die hole, resulting in poor operability. If it exceeds 1% by weight, the effect is comparable and not preferable from the economical point of view. Especially, when the yarn fineness is small and titanium oxide is contained, magnesium remaining as insoluble foreign matter in polyamide is titanium oxide. This causes problems such as an increase in filtration pressure with a filter installed to remove foreign matter and deterioration of physical properties of polyamide fiber. More preferably,
0.02 to 0.1% by weight.

Examples of the magnesium compound contained in the polyamide continuous fiber for knitting used in the stocking of the present invention include magnesium oxide, magnesium hydroxide, magnesium carbonate and the like, and mixtures thereof.
It is preferable to use magnesium oxide or magnesium hydroxide. The average particle size of these magnesium compounds is preferably 10 μm or less. Average particle size is 1
When it exceeds 0 μm, for example, when producing polyamide fibers, problems such as an increase in filtration pressure with a filter installed for removing foreign matters and deterioration of physical properties of polyamide filaments for interlacing occur. More preferably, it is 5 μm or less.

As a method of incorporating a magnesium component, a method of blending and melting a magnesium compound in polyamide pellets, a method of blending and melting master pellets containing a high concentration of magnesium in polyamide pellets, and a method of melting polyamide in a molten state Examples thereof include a method of adding a compound and kneading, and a method of adding a magnesium compound to a raw material or a reaction system before or during polymerization of polyamide. Any method may be used as long as both are uniformly mixed.

The polyamide continuous fiber for knitting used in the stocking of the present invention must have a yarn fineness of 11 to 27 decitex. Further, from the viewpoint of durability and softness of stockings, 13 to 22 decitex is preferable.

When the yarn fineness is less than 11 decitex,
Not only is it difficult to obtain the durability of stockings, but the productivity of polyamide long fibers for interlaced knitting and the productivity of knitting of stockings deteriorates. When it exceeds 27 decitex, the softness of the stocking is unfavorably deteriorated.

The polyamide continuous filament for knitting used in the stocking of the present invention is required to have a single yarn fineness of 3 to 8 decitex. When it is less than 3 decitex, not only is it difficult to obtain the durability of the stocking, but also the productivity of the polyamide continuous filament for knitting, the productivity of stocking knitting and the like is deteriorated. When it exceeds 8 decitex, the softness of the stocking is deteriorated, which is not preferable.

The polyamide continuous filament for knitting used in the stocking of the present invention has an amino terminal group amount of 4 × 10 ^{−5 to} 7 ×.
It is necessary to be 10 ⁻⁵ mol / g. When the amount of amino end groups is less than 4 × 10 ^-5 mol / g, when dyed with an acid dye commonly used in polyamide fibers for clothing, the effect of adding titanium oxide makes the color dull and fashionable. Is not suitable for the purpose of the present invention. On the other hand, when it is more than 7 × 10 ⁻⁵ mol / g, yarn breakage during the production of fibers is increased, which is not preferable in terms of yarn production stability. More preferably, it is 4.5 × 10 ^{−5 to} 6.5.
× 10 ⁻⁵ mol / g.

Examples of the polyamide continuous filament for knitting used in the stocking of the present invention include nylon 6 and nylon 6
Polyamide 6, 6, nylon 610, nylon 46, or a copolymer thereof may be used, but nylon 6 and nylon 66 are particularly excellent in properties required for clothing applications, such as dyeability, washing fastness, and mechanical properties. Is preferred.

Polyamide filaments for interlacing containing a predetermined concentration of titanium oxide and magnesium compound can be obtained by a usual melt spinning method. The yarn making method is to melt the polyamide pellets, discharge them from the discharge holes, and after cooling, lubrication and entanglement,
A spinning method at a speed of 1000 m / min or more, followed by hot drawing without winding once, and spin drawing at a speed of 3000 m / min or more.
Alternatively, the polyamide pellets may be melted, discharged from a discharge hole, cooled, refueled, temporarily wound at 1000 m / min, and then stretched, followed by a two-step method. further,
Polyamide pellets are melted, discharged from a discharge hole, cooled, oiled, and entangled, and then spun up at a speed of 1000 m / min or more, without being wound up and substantially not stretched 300
By the high-speed method of taking up the spin at a speed of 0 m / min or more, the PO
It is also possible to use polyamide long fibers for interlaced knitting in which Y is made into a yarn and then subjected to higher-order processing such as false twisting. In particular, the fineness of the polyamide fiber used in the stocking of the present invention is mainly fine, and therefore, from the viewpoint of productivity, it is preferable to manufacture the polyamide fiber by a high-speed direct hot drawing method at a speed of 3000 m / min or more.
The cross-sectional shape of the polyamide continuous filament for knitting is not particularly limited, but, for example, in the case of stocking use,
A round cross section, a flat cross section, a lens mold cross section, a trilobal cross section, and a four lobe cross section without recesses are preferable because they are good in texture such as softness of stockings.

The covering polyamide filaments constituting the covering elastic yarn of the present invention may be any general polyamide filaments for covering, but 1 to 7% by weight of titanium oxide and magnesium compound are used. Contains 0.01 to 1% by weight and has a yarn fineness of 5
-18 decitex, single yarn fineness 1-3 decitex,
The amount of amino terminal groups is preferably 4 × 10 ^{−5 to} 7 × 10 ⁻⁵ mol / g. This is because the characteristics of the polyamide long fibers for covering are brought close to the characteristics of the polyamide long fibers for interlaced knitting, thereby achieving the soft texture, cool contact feeling, and ultraviolet shielding property which are the objects of the present invention to a higher degree, and the fabric appearance. This is because you can get good stockings.

The covering elastic yarn targeted by the present invention may be a single covering elastic yarn or a double covering elastic yarn. The single covering elastic yarn is a composite elastic yarn in which a covering yarn is wound around an elastic fiber yarn. The double-covering elastic yarn is a composite elastic yarn in which a covering yarn is wound around the elastic fiber yarn in different directions so as to be double-wound.

In the case of a single covering elastic yarn, the number of windings (hereinafter referred to as the number of twists) is 1400 to 2500t.
/ M is preferable. When it is less than 1400 t / m, the covering state of the elastic fiber is deteriorated, so that the appearance of the knitted fabric and the soft feeling in the stocking are deteriorated. Further, the fine polyamide fine fibers for covering which contain titanium oxide have low strength, so if the covering state is poor, the fibers will be broken by a slight hooking and the durability of the stocking will be deteriorated. On the other hand, when it exceeds 2500 t / m, the elasticity of the elastic fiber is lowered, and the fit of the stocking is deteriorated. Further, yarn breakage frequently occurs during the production of the covering elastic yarn, which is not preferable in production.

In the case of the double covering elastic yarn, the number of lower twists is preferably 1800 to 4000 t / m. 1800t / m
When it is less than the above range, the covering property to the elastic fiber is deteriorated, the covering is not covered even when wound with the upper winding yarn, and the knitted fabric appearance and the soft feeling in the stocking are deteriorated. On the other hand, when it exceeds 4000 t / m, the elasticity of the elastic fiber is lowered, and the fit of the stocking is deteriorated. Further, yarn breakage frequently occurs during the production of the covering elastic yarn, which is not preferable in production. The number of upper twists is preferably 0.75 x (number of lower twists) to 0.95 x (number of lower twists). 0.75 x
When it is less than (number of lower twists) or exceeds 0.95 × (number of lower twists), the winding balance of the upper winding yarn and the lower winding yarn is lost, and torque is generated. It becomes a knitted fabric, which is not preferable.

Further, as the elastic fiber serving as the core yarn of the covering elastic yarn, polyurethane type elastic fiber, polyamide type elastomer elastic fiber, polyester type elastomer elastic fiber, natural rubber type fiber, synthetic rubber type fiber, butadiene type fiber and the like are used. Although used, polyurethane-based elastic fibers and polyamide-based elastomer elastic fibers are preferable because of their elastic properties, thermal properties, durability and the like.

The fineness of these elastic fibers is not particularly limited. For example, in the case of stocking use, it varies depending on the setting of the tightening pressure, but is generally 8 to 80.
It may be in the range of about decitex. In such a range, the yarn strength is sufficient, troubles such as core yarn breakage are less likely to occur during covering and knitting, and the stretchability and durability of the stocking are sufficient while the tightening force is not too strong. There is no feeling of coarseness.

[0038]

The present invention will be described in more detail with reference to the following examples. The methods for measuring the physical properties are as follows.

A. Ultraviolet ray shielding property A JIS B 7751 ultraviolet ray carbon arc lamp type light resistance tester is used to measure the maximum intensity and integrated amount of ultraviolet rays when a carbon arc is used as a light source for 3 minutes and an ultraviolet intensity meter (manufactured by Toray Techno Co., Ltd.). Then, the ultraviolet ray shielding rate is obtained by the following formula. Ultraviolet ray shielding rate (%) = 100− (maximum strength of knitted fabric) / (maximum strength of light source) × 100.

B. The cool contact sensation of the stockings of touch sensation was evaluated relative to the touch sensation of the inspector (30 persons) according to the following criteria. ◎: Very cool contact sensation, ○: Slightly cool contact sensation,
Δ: There is not much cool contact feeling, x: There is no cool contact feeling.

C. The soft feeling stocking products were relatively evaluated on the basis of the touch feeling of inspectors (30 persons) according to the following criteria. ◎: Very soft feeling, ○: Soft feeling,
Δ: Not very soft. X: There is no soft feeling.

D. Dissolve the amino end group amount sample with a phenol / ethanol mixed solution, and add N /
Neutralization titration is carried out with an aqueous solution of 50 hydrochloric acid using thymol blue as an indicator. Determine the amino group concentration from the hydrochloric acid consumption.

E. Polyamide fiber spinnability When melted at 260 ° C, discharged from a round hole spinneret with 4 yarns per spinneret, and obtained by a high-speed direct drawing method at a winding speed of 4000 m / min, a nylon 6 fiber yarn with 17 decitex 3 filaments With respect to yarn breakage per 1 t of the yarn, the yarn formability was shown based on the following criteria. ◯: Thread break less than 2 times, Δ: Thread break 2 to less than 4 times, ×:
Thread breaks 4 times or more.

F. A polyamide fiber yarn equivalent to 68 decitex (4 combined yarns of 17 decitex fiber yarn) having a color forming property was used to prepare a tubular knitted fabric with a single-knitting tubular knitting machine, and after refining by a conventional method, 0.
Color difference meter Σ after dyeing with a 3% owf blue acid dye (Xylene Fast Blue P) in a 90 ° C water bath and drying
A value and b value are measured by 80 (manufactured by Nippon Denshoku Industries Co., Ltd.). Clear color development is calculated from the obtained a value and b value. Color development = (a ² + b ² ) ^1/2 . The larger the value, the greater the color developability, and when 37 or more, the excellent color developability is exhibited.
The color development was shown based on the following criteria. ◯: 37 or more, Δ: 34 or more and less than 37, x: less than 34.

Example 1 5.0% of titanium oxide having an average particle size of 0.3 μm and 0.04% of magnesium oxide having an average particle size of 2.0 μm and an amino terminal group amount of 5.0 × 10 ⁻⁵ mol / g Nylon 6 pellets are melted at 260 ° C, discharged from a round hole die, cooled, lubricated, entangled, hot-stretched at 155 ° C, and a winding speed of 40
A 17 decitex 3-filament polyamide filament for knitting was obtained by a high-speed direct drawing method at 00 m / min. Table 1 shows the results of evaluating the spinnability and color developability of the obtained long fibers.

Similarly, the amount of amino end groups contained in titanium oxide 5.0% and magnesium oxide 0.04% 5.0 ×
Nylon 6 pellets of 10 ⁻⁵ mol / g were melted at 260 ° C., discharged from a round hole die, cooled, lubricated, entangled, and 1
By hot drawing at 55 ° C. and high speed direct drawing method at a winding speed of 4000 m / min, 13 decitex 7 filament long polyamide filaments for covering were obtained.

The obtained continuous filaments for covering were subjected to single covering in the S direction or the Z direction at a draft of 2.9 and a twist number of 2000 t / m, using Toray Dupont "Lycra" 20 decitex as the core yarn, and single covering in the S direction. Elastic yarns and Z-direction single covering elastic yarns were produced.

Using the obtained single-covering elastic yarn and polyamide filament for interlacing, using a Super 4 knitting machine (400 needles) manufactured by Nagata Seiki Co., Ltd., the single-covering elastic yarn and polyamide filament for interlacing Are alternately supplied to the yarn feeder of the knitting machine, and the leg part knitted fabric is a panty hose in which a single covering elastic yarn and a polyamide long fiber for interlacing are knitted, and dyeing, finishing and template setting by a usual method. And it was made into pantyhose product.

Table 1 shows the evaluation results of the ultraviolet ray shielding property, the cool contact feeling and the soft feeling of the leg parts of the obtained panty hose products.

Example 2 Spinning was performed in the same manner as in Example 1 except that nylon 6 pellets containing 0.3% of titanium oxide having an average particle size of 0.3 μm and 0.04% of magnesium oxide having an average particle size of 2.0 μm were used. , 13 decitex 7 filament long polyamide filaments for covering were obtained.

The obtained continuous filaments for covering were covered in the same manner as in Example 1 to obtain covering elastic yarns.

Using the obtained covering elastic yarn, pantyhose was manufactured by interlacing with the polyamide continuous fiber for interlacing similar to Example 1. Table 1 shows the results of evaluation of the ultraviolet shielding properties, the cool contact feeling, and the soft feeling of the legs of the obtained panty hose products.

Example 3 Spinning was performed in the same manner as in Example 1 except that nylon 6 pellets containing 2.0% of titanium oxide having an average particle size of 0.3 μm and 0.04% of magnesium oxide having an average particle size of 2.0 μm were used. , 17 decitex 3-filament polyamide continuous fiber for knitting was obtained. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn.

Using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn as in Example 2. Table 1 shows the results of evaluation of the ultraviolet shielding properties, the cool contact feeling, and the soft feeling of the legs of the obtained panty hose products.

Comparative Example 1 Spinning was performed in the same manner as in Example 1 except that titanium oxide was not included,
A polyamide continuous filament having 17 decitex 3 filaments for interlacing was obtained. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Comparative Example 2 The same spinning as in Example 1 was carried out except that 0.5% of titanium oxide having an average particle diameter of 0.3 μm was contained to obtain 17 decitex 3-filament polyamide continuous fiber for knitting. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Comparative Example 3 The same spinning as in Example 1 was carried out except that 10.0% of titanium oxide having an average particle diameter of 0.3 μm was contained to obtain a polyamide filament fiber for interlace knitting having 17 decitex 3 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Comparative Example 4 Spinning was performed in the same manner as in Example 1 except that magnesium oxide was not included, to obtain a polyamide filament fiber for interlacing having 17 decitex 3 filaments. About the obtained fiber yarn,
The results of evaluation of color forming properties are shown in Table 1. Also,
A pantyhose was manufactured by using the obtained fiber yarn and knitting with the covering elastic yarn as in Example 2.

Comparative Example 5 Spinning was carried out in the same manner as in Example 1 except that 1.5% of magnesium oxide having an average particle size of 2.0 μm was contained, and 17 decitex 3 was used.
Polyamide filaments for interlacing filaments were obtained. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Comparative Example 6 Spinning was carried out in the same manner as in Example 1 to obtain a polyamide long fiber for interweaving having 10 decitex 2 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Also, using the obtained fiber yarn, Example 2
Panty hose was manufactured by interlacing with a covering elastic yarn similar to the above.

Comparative Example 7 Spinning was carried out in the same manner as in Example 1 to obtain a polyamide filament fiber for interlacing having 30 decitex 6 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Also, using the obtained fiber yarn, Example 2
Panty hose was manufactured by interlacing with a covering elastic yarn similar to the above.

Comparative Example 8 Spinning was carried out in the same manner as in Example 1 to obtain a polyamide continuous fiber for interlacing having 17 decitex 7 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Also, using the obtained fiber yarn, Example 2
Panty hose was manufactured by interlacing with a covering elastic yarn similar to the above.

Comparative Example 9 Spinning was carried out in the same manner as in Example 1 to obtain 17 decitex 2-filament polyamide continuous fiber for knitting. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Also, using the obtained fiber yarn, Example 2
Panty hose was manufactured by interlacing with a covering elastic yarn similar to the above.

Comparative Example 10 Nylon 6 having an amino end group amount of 3.0 × 10 ⁻⁵ mol / g
Spinning was carried out in the same manner as in Example 1 except that pellets were obtained to obtain polyamide filaments for interlacing with 17 decitex 3 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Comparative Example 11 Nylon 6 having an amino end group content of 8.0 × 10 ⁻⁵ mol / g
Spinning was carried out in the same manner as in Example 1 except that pellets were obtained to obtain polyamide filaments for interlacing with 17 decitex 3 filaments. Table 1 shows the results of evaluation of the fiber forming properties of the obtained fiber yarn. Further, using the obtained fiber yarn, panty hose was manufactured by interlacing with the covering elastic yarn similar to that in Example 2.

Table 1 shows the results of evaluation of the ultraviolet shielding property, cool contact feeling and soft feeling of the leg parts of the pantyhose products obtained in Comparative Examples 1 to 11.

[0067]

[Table 1]

As is clear from the results shown in Table 1, the stocking of the present invention has a very remarkable effect on the ultraviolet shielding property, the cool contact feeling and the soft feeling, and the conventional polyamide composition comprising the polyamide containing titanium oxide. It can be seen that, by comparison, it has an extremely remarkable effect of being excellent in yarn formability.

[0069]

EFFECTS OF THE INVENTION According to the present invention, it is possible to provide a stocking having good contact cooling sensation and ultraviolet ray shielding property, and to provide stable production of a polyamide fiber having a high fineness and a high titanium oxide content for use in the stocking. it can.

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Claims (4)

[Claims] 1. A covering elastic yarn comprising an elastic fiber as a core yarn and a polyamide long fiber for covering wound around the core yarn,
In a stocking in which leg portions are alternately knitted with polyamide long fibers for interlacing every course, the polyamide long fibers for interlacing contain 1 to 7% by weight of titanium oxide and 0.01 to 1% by weight of magnesium compound. And the yarn fineness is 11 to 27 decitex, the single yarn fineness is 3 to 8 decitex, and the amino end group amount is 4 × 10 ^{−5 to} 7 × 10 ⁻⁵ m.
Stocking characterized by being ol / g. 2. A covering polyamide long fiber constituting a covering elastic yarn contains 1 to 7% by weight of titanium oxide and 0.01 to 1% by weight of a magnesium compound, and has a yarn fineness of 5 to 18%. Decitex, single yarn fineness is 1
3 decitex, the amount of amino end groups is 4 × 10 ^{-5 to} 7 × 1
The stocking according to claim 1, wherein the stocking is 0 ^-5 mol / g. 3. The stocking according to claim 1, wherein the covering elastic yarn constituting the stocking is a single covering elastic yarn having a twist number of 1400 to 2500 t / m. 4. The covering elastic yarn constituting the stocking has a lower twist of 1800 to 4000 t / m and an upper twist of 0.75.
The stocking according to claim 1 or 2, wherein the stocking is a double covering elastic yarn of x (number of lower twists) to 0.95 x (number of lower twists) t / m.