JP2000178860A - Knit fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain knit fabrics excellent in appearance quality, fitting ability, wearablity, wear feeling, stretchability and the like when used as clothing by containing a polypyrrolidone and/or its copolymer in spandex fiber mainly composed of polyurethane. SOLUTION: The spandex fiber composed mainly of polyurethane, having 10-50 d preferably 10-30 d fineness and good at stress relaxation, strength, elongation and heat-set ability is obtained by spinning a polyurethane solution added 0.5-15 wt.% preferably 1-12 wt.% polyvinylpyrrolidone having 20-70 K-value and/or its copolymer. Knit fabrics such as circular knitting, weft knitting and the like are knitted using this spandex fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a knitted fabric. More specifically, the present invention relates to a knitted fabric suitably used for stockings, socks, circular knits, flat knits, and the like which are excellent in appearance quality, fit, wearability, wearing feeling, elongation, and the like when used for clothes and the like.

[0002]

2. Description of the Related Art Conventionally, elastic yarns such as polyurethane elastic yarns have been used for stockings. Such elastic yarns have been used as textured yarns coated with inelastic yarns.

[0003] In recent years, in particular, the appearance quality, fit, wearability, and wearing feeling of stockings have been improved more than conventional knitted products.
From the viewpoint of improving the quality, a zokki that increases the mixing ratio of the elastic yarn has been proposed. However, there is a problem of pressure and size, which has not been completely solved by the conventional technology. In other words, when the mixing ratio of the elastic yarn such as the polyurethane yarn increases, the contact pressure tends to increase slightly and the size tends to decrease.

As a solution to such a problem, several means have been adopted from raw yarn to high-order processing. As a typical means, from the viewpoint of the raw yarn, for example, a method of increasing the setting property and the heat setting property has been adopted. Also,
From the viewpoint of higher-order processing, for example, a method of lowering the draft of the processing step has been adopted.

However, the effect of the former alone is low for such purposes at present. In the case of the latter, there is a problem that if the cost is increased, the heat setting property is increased, and the size is finished large, elongation is lost.

[0006]

According to the present invention, it is possible to obtain a product excellent in appearance quality, fit, wearability, wear feeling, elongation, etc., which cannot be obtained by the prior art.

Further, the knitted fabric of the present invention can be developed for various uses.

[0008]

Means for Solving the Problems The knitted fabric of the present invention has the following matters specifying the invention in order to solve the above-mentioned problems. That is, a polyvinylpyrrolidone and / or a copolymer thereof is contained, and a K value of the polyvinylpyrrolidone and / or a copolymer thereof is 20 or more and 70 or less, and a main component is a spandex yarn composed of polyurethaneurea. It is a knitted fabric characterized by the following.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

First, the polyurethane used in the present invention will be described.

The polyurethane used in the present invention comprises a diamine extension. The synthesis method is not particularly limited. That is, it is a polyurethane urea mainly synthesized from a polyol, a diisocyanate and a diamine.

[0012] Polyurethane using ethanolamine as a chain extender may be used.

It is to be noted that trifunctional or higher polyfunctional glycols and isocyanates may be used without impairing the effects of the present invention.

Here, typical structural units constituting the spandex yarn of the present invention will be described.

As the polyol used in the present invention, polyether glycol, polyester glycol, polycarbonate diol and the like are typical.

[0016] In particular, when flexibility and elongation of the yarn are required, it is preferable to use a polyether-based glycol. As polyether glycols,
For example, polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol (hereinafter, referred to as
PTMG), modified PTMG which is a copolymer of THF and 3-MeTHF (hereinafter abbreviated as 3M-PTMG), modified PTMG which is a copolymer of THF and 2,3-dimethylTHF, Patent No. 2615131 Polyols having side chains on both sides disclosed in the above-mentioned publications can be used as typical examples. These polyether-based glycols may be used alone or as a mixture or copolymer of two or more.

Further, when abrasion resistance and light resistance are particularly required as the spandex yarn, butylene adipate,
Polycaprolactone diol, JP-A-61-26612
And polyester diols such as polyester polyols having a side chain disclosed in Japanese Patent Publication No. JP-A-2-289516 and polycarbonate diols disclosed in Japanese Patent Publication No. 2-289516.

These polyols may be used alone or as a mixture or copolymer of two or more.

The molecular weight of the polyol used in the present invention is preferably one having a number average molecular weight of 1 from the viewpoint of elongation, strength, heat resistance and the like when formed into yarn.
It is preferably from 000 to 8,000. More preferably, it is 2500 or more and 6000 or less. By using a polyol having a molecular weight in this range, an elastic yarn having excellent elongation, strength, elastic recovery force and heat resistance can be obtained.

Next, the diisocyanate used in the present invention is diphenylmethane diisocyanate (hereinafter abbreviated as MDI), tolylene diisocyanate, 1,4-diisocyanate benzene, xylylene diisocyanate, 2,6
-An aromatic diisocyanate such as naphthalene diisocyanate is particularly suitable for synthesizing a polyurethane having high heat resistance and strength.

Further, as the alicyclic diisocyanate, for example, methylene bis (cyclohexyl isocyanate)
(Hereinafter abbreviated as H ₁₂ MDI), isophorone diisocyanate, methylcyclohexane 2,4-diisocyanate, methylcyclohexane 2,6-diisocyanate,
G, cyclohexane 1,4-diisocyanate, hexahydroxylylene diisocyanate, hexahydrotolylene diisocyanate, octahydro 1,5-naphthalenedi isocyanate, and the like. Aliphatic diisocyanates can be effectively used especially for suppressing yellowing of spandex yarn. These diisocyanates may be used alone or in combination of two or more.

Next, as the chain extender used in the present invention, at least one of those having a hydroxyl group and an amino group in the molecule such as a low molecular weight diamine and ethanolamine is used.

Preferred low molecular weight diamines include, for example, ethylenediamine, 1,2-propanediamine,
1,3-propanediamine, hexamethylenediamine,
1,4-cyclohexyldiamine, 1,3-cyclohexyldiamine, hexahydrometaphenylenediamine,
2-methylpentamethylenediamine, bis (4-aminophenyl) phosphine oxide and the like can be used. One or more of these can be selected and used. Particularly preferred is ethylenediamine. By using ethylenediamine, a yarn excellent in elongation, elastic recovery, and heat resistance can be produced.

A triamine compound capable of forming a crosslinked structure, such as diethylenetriamine, may be added to these chain extenders to such an extent that the effect is not lost.

The molecular weight of the spandex yarn used in the present invention is preferably from 40,000 to 150,000 as a number average molecular weight. Within this range, fibers having particularly high durability and strength can be obtained.

Incidentally, the molecular weight in the present invention is measured by GPC and is converted by polystyrene. The spandex yarn used in the present invention is preferably composed of such a configuration.

Particularly preferred as the spandex yarn used in the present invention is, among these, those comprising diol and diisocyanate and having a high-temperature side melting point of 250 ° C. or more and 300 ° C. or less. The melting point on the high-temperature side in the present invention is a value of a second run when a yarn is measured by DSC, and corresponds to a so-called hard segment melting point of polyurethane. High melting point 250
When the temperature is not lower than 300 ° C. and not higher than 300 ° C., the yarn of the present invention has no practical problem including the process passability, and is excellent in heat setting property.

A spandex yarn which uses a polyol having a molecular weight of 1500 or more and 6000 or less and is mainly synthesized from MDI and has a high-temperature side melting point of 250 ° C. or more and 300 ° C. or less has particularly high elongation. As described above, it is preferable because there is no practical problem including the process passability and the heat setting property is excellent.

In order to make the high-temperature side melting point of the spandex yarn 250 ° C. or more and 300 ° C. or less, it is preferable to conduct a test in advance and select the ratio of diisocyanate to polyol and diamine.

Next, the present invention includes at least one of polyvinylpyrrolidone (hereinafter abbreviated as PVP) and a copolymer thereof.

The K value of PVP and a copolymer thereof used in the present invention is from 20 to 70.

In the present invention, the K value is a value calculated from the viscosity equation of Fikenscher. When the K value is 20 or more and 70 or less, production of spandex yarn becomes particularly easy. It is also easy to make the properties of the spandex yarn to be produced the target properties. Further, in practical use, dropping of PVP can be substantially prevented.

The required content of PVP and its copolymer in the spandex yarn depends on the target characteristics of the spandex yarn, and particularly on the K value. Therefore, it is preferable to appropriately select the K value and the PVP content according to the target properties of the yarn.

The preferred content of PVP and its copolymer is from 0.1% by weight to 15% by weight. If the spandex yarn contains at least one of PVP and its copolymer, although the cause is unknown, the heat setting property and the mechanical setting property are improved, but the elongation and stress relaxation are improved. And other properties are not adversely affected.
Even if at least one of VP and its copolymer is present in the yarn, the unexpected surprising phenomenon that the yarn does not fibrillate and is not different from the conventional spandex yarn in use at all is used. Express.

If the amount is less than 0.1% by weight, no effect tends to be obtained, and if it exceeds 15% by weight, the elongation tends to decrease.

It is particularly preferable that the content of at least one of PVP and a copolymer thereof is 0.1.
5 to 15% by weight. When the content of at least one of PVP and its copolymer is in the range of 0.5% by weight or more and 15% by weight or less, setability, stress relaxation, strength, elongation, and heat setability become particularly good. . Particularly preferred is 1% by weight or more and 12% by weight or less.

Since these characteristic values need to be changed depending on the use of the spandex yarn, it is preferable to conduct a test in advance according to the use and determine the content ratio of PVP and its copolymer appropriately.

In the present invention, the copolymer compound used for synthesizing the copolymer of PVP is not particularly limited. For example, N-isopropenyl 2-pyrrolidone,
N-vinyl 4-methyl 2-pyrrolidone, N-vinyl piperidone, N-vinyl caprolactam, N-vinyl enantholactam, N-vinyl valerolactam, N-butenyl-2,4-di (1-butenyl) -2-pyrrolidone vinyl Acetate, dimethylaminoethyl methacrylate, styrene, acrylic acid and the like can be used. These copolymers may be either block copolymers or random copolymers.

The fineness and cross-sectional shape of the spandex yarn used in the present invention are not particularly limited, but usually the fineness of the spandex yarn is preferably in the range of 10 to 40 denier, more preferably 14 to 20 denier. The cross section of the yarn may be circular or flat.

The elongation at break is preferably at least 300%.

Further, there is no problem even if the spandex yarn used in the present invention contains various stabilizers and pigments. For example, hindered phenol-based drugs such as BHT and Sumitomo Chemical's "Sumilyzer" GA-80 as light and antioxidants, benzotriazole drugs such as various "tinuvins", Sumitomo Chemical "Sumilyzer" P-16 and other phosphorus-based drugs, various "tinuvin" and other hindered amine-based drugs, titanium oxide, zinc oxide,
Inorganic pigments such as carbon black, metal soaps such as magnesium stearate, and disinfectants containing silver, zinc and these compounds, deodorants, silicones, lubricants such as mineral oil, barium sulfate, Various antistatic agents including cerium oxide, betaine, phosphoric acid and the like may be contained, or they may react with the polymer.

In order to further increase the durability especially against light and various types of nitric oxide, a nitric oxide supplement, for example,
HN-150 manufactured by Nippon Hydrazine, a thermal oxidation stabilizer such as "Sumilyzer" GA-80 manufactured by Sumitomo Chemical, and a light stabilizer such as "Sumisorb" 300 # 62 manufactured by Sumitomo Chemical.
It is effective to use 2 or the like.

The fineness of the polyurethane yarn used in the present invention is preferably in the range of 10 to 50 denier, more preferably in the range of 10 to 30 denier.

The elongation at break is preferably at least 300%.

Next, the method for producing the polyurethane yarn used in the present invention will be described in detail.

In the present invention, a polyurethane solution is first prepared.

In the present invention, any method may be used for producing the solute polyurethane or the polyurethane solution. That is, either the melt polymerization method or the solution polymerization method may be used. However, more preferred is the solution polymerization method. In the case of the solution polymerization method, the generation of foreign substances such as gel in the polyurethane is small, the spinning is easy, and the polyurethane yarn with low fineness is easily obtained. Also, needless to say, solution polymerization is preferable from the viewpoint of production efficiency because labor for preparing a solution is omitted.

As the polyurethane particularly suitable for the present invention, those described above can be used. Among these, particularly preferred polyurethane is a polyol having a molecular weight of 2500 or more and 6000 or less, and a diamine as a chain extender is ethylenediamine, 1,2-propanediamine, 1,3-propanediamine, hexamethylenediamine, 1,4-cyclohexyldiamine, 1,3
-Cyclohexyldiamine and at least one selected from the group consisting of 2-methylpentamethylenediamine, the diisocyanate is synthesized in a solution using MDI as a main raw material, and the melting point of the polyurethane on the high temperature side is 250 ° C or higher and 300 ° C or lower. Is a polyurethane solution.

Such polyurethane is, for example, DMA
It can be obtained by synthesizing the above raw materials in C, DMF, DMSO, NMP or the like or a solvent containing these as main components.

For example, a method in which a polyol and MDI are firstly melt-reacted, and then the reactant is dissolved in a solvent and reacted with the above-mentioned diamine to obtain a polyurethane can be employed as a particularly preferable method.

As a typical method for adjusting the high-temperature side melting point of the polyurethane to 250 ° C. or more and 300 ° C. or less, a method of controlling the types and ratios of polyol, MDI, and diamine is preferably employed. When the molecular weight of the polyol is high, it is preferable to relatively increase the proportion of MDI.

When the molecular weight of the polyol is 1500 or more, the melting point on the high temperature side can be made 250 ° C. or more by using (MDI
(Mol number of polyol) / (mol number of polyol) = 1.3 or more.

Hereinafter, (mol number of MDI) / (mol number of polyol) is referred to as CR value.

When synthesizing such a polyurethane,
An amine catalyst or an organometallic catalyst may be used alone or in combination of two or more. Typical examples thereof include amine catalysts such as N, N-dimethylcyclohexylamine, N, N-dimethylbenzylamine, triethylamine, N-methylmorpholine,
Ethylmorpholine, N, N, N ', N'-tetramethylethylenediamine, N, N, N', N'-tetramethyl-1,3-propanediamine, N, N, N ', N'-tetramethylhexane Diamine, bis-2-dimethylaminoethyl ether, N, N, N ', N', N'-pentamethyldiethylenetriamine, tetramethylguanidine, triethylenediamine, N, N'-dimethylpiperazine, N-methyl-N'- Dimethylaminoethyl-piperazine, N- (2-dimethylaminoethyl) morpholine, 1-methylimidazole, 1,2-dimethylimidazole, N, N-dimethylaminoethanol, N, N,
N'-trimethylaminoethylethanolamine, N-
Methyl-N ′-(2-hydroxyethyl) piperazine,
2,4,6-tris (dimethylaminomethyl) phenol, N, N-dimethylaminohexanol, triethanolamine and the like can be used. Further, as the organic metal catalyst, tin octoate, dibutyl tin dilaurate, lead dibutyl octoate and the like can be used.

The concentration of the polyurethane solution thus obtained is not particularly limited, but is usually preferably in the range of 30% by weight to 80% by weight.

In the present invention, at least one of PVP and a copolymer thereof is added to the polyurethane solution. As a method of adding at least one of PVP and its copolymer to the polyurethane solution, any method can be adopted.

Typical examples of the method include a method using a static mixer and a method using stirring.

Here, it is preferable that at least one of the added PVP and its copolymer is added in the form of a solution. If it is a solution, it can be uniformly added to the polyurethane solution.

It should be noted that the addition of at least one of PVP and its copolymer may increase the solution viscosity.

The addition to the polyurethane solution is as described above.
For example, it may be added at the same time as chemicals and pigments such as a light resistance inhibitor and an antioxidant.

Next, at least one of the added PVP and its copolymer has a K value of 20 or more and 70 or less. If the ratio is out of this range, there is a problem that spinning becomes unstable and a polyurethane yarn having desired characteristics cannot be obtained.

The dry spinning method in the present invention is not particularly limited, and any method can be adopted.

Next, the setting property and stress relaxation of the polyurethane yarn used in the present invention are particularly susceptible to the speed ratio between the god roller and the winder, and therefore, it is preferable to determine the setting according to the purpose of use of the yarn.

That is, it is preferable that the speed ratio between the god roller and the winder is 1.15 or more and 1.65 or less. When a yarn having particularly high setting property and low stress relaxation is required, the ratio is set to 1.15 or more and 1.40.
It is more preferred to be less than or equal to 1.15 and more preferably 1.35 or less.

On the other hand, when a yarn having low setting property and high stress relaxation is required, the ratio is preferably 1.25 or more and 1.65 or less, and the ratio is preferably set to 1.35 or more and 1.65 or less. It is more preferable to take.

The spinning speed is preferably 450 m / min or more from the viewpoint of increasing the strength.

Next, the inelastic yarn used in the present invention will be described.

The inelastic yarn used in the present invention may be either a filament yarn or a spun yarn.

Specifically, the filament yarn is a synthetic fiber such as rayon, acetate, polyamide, polyester, acrylic, polypropylene, vinyl chloride or the like, or silk (raw yarn). Any of yarns such as yarns may be used, and these composite yarns may be used.

All of these are preferably stable yarns that are easily twisted. The spun yarn is a staple made of synthetic fibers such as cotton, wool, hemp, silk, and the like, rayon, polyamide, polyester, acrylonitrile, polypropylene, vinyl chloride, and the like. Any thread may be used.

In the case of a filament yarn, the range is preferably 5 to 30 d, and more preferably 7 to 12 d.

Next, a method for producing the coated elastic yarn used in the present invention will be described in detail.

In the present invention, when a filament yarn is used as the inelastic yarn, a polyurethane yarn serving as a core component is drafted using a commercially available twisting machine, and a single or double inelastic yarn is wound around the polyurethane yarn. Can be used.

In the present invention, the number of twists can be appropriately selected depending on the denier and the number of filaments of the mating material. In the case of single coating, the number is preferably in the range of 1,000 to 3,000 t / m. In the case of double coating, the lower side is 1000-3
It is preferably in the range of 500 t / m. From the viewpoint of canceling the torque of the lower twist, it is preferable that the twist direction is opposite to the lower twist, and the twist number of the upper twist is 0.7 to 0.9 times the twist number of the lower twist. It is preferably a number.

In the present invention, the core yarn is stress-relaxed by elongation, and the elasticity becomes latent, so that the elasticity becomes evident when subjected to energy such as steam or boiling water in a high-order processing step. In view of obtaining a product having a large size and excellent elongation characteristics, the covering draft is preferably 2.0 or more and 4.0 or less, and more preferably 2.4 or more and 3.0 or less.
It is more preferably 2 or less.

Next, a knitted fabric according to the present invention will be described.

The knitted fabric of the present invention uses the coated elastic yarn,
The knitting can be performed by using a commercially available knitting machine in accordance with each application while appropriately selecting conditions. Such a knitted fabric has a feature that the length and the width are knitted larger than those of the conventional knitted fabric, since the knitted fabric has a latent elasticity.

Then, in the high-order processing step after knitting, by exposing to a steam or high-temperature water in a relaxed state, the latent shrinkage becomes apparent and the characteristic that the stretchability is restored is exhibited. .

In the case of pantyhose and some socks, a knitted fabric is inserted into a metal plate, steam is applied, a dry heat treatment is applied, wrinkles are stretched, and a shape suitable for a leg of a wearer is applied. , But such conditions can be selected from ordinary conditions.

[0080]

EXAMPLES The present invention will be described in more detail with reference to Examples. However, the present invention is not limited by these examples.

The setting property, stress relaxation, strength, elongation, heat setting property, and method for quantifying polyvinylpyrrolidone in the present invention will be described. [Set property, stress relaxation, strength, elongation] For setability, stress relaxation, strength, elongation, spandex yarn is used for Instron 4
It was obtained by performing a tensile test using a 502 type tensile tester. These are defined below.

A 5 cm (L1) sample was subjected to 300% elongation five times at a pulling rate of 50 cm / min. The stress at this time was defined as (G1). The length was then held for 30 seconds. 3
The stress after holding for 0 second was defined as (G2). Next, the elongation was recovered and the length of the sample when the stress became 0 was defined as (L2). Further, it was stretched until the spandex yarn was cut at the sixth time. The stress at break was (G3), and the sample length at break was (L3). Hereinafter, the above characteristics were obtained by the following equation.

Strength = (G3) Stress relaxation = 100 × ((G1) − (G2)) / (G1) Setability = 100 × ((L2) − (L1)) / (L1) Elongation = 100 × ( (L3)-(L1)) / (L1) [Heat setting property] Yarn is free and steamed at 100 ° C for 10 minutes.
The mixture was then treated for 2 hours with free boiling water at 100 ° C. and dried at room temperature for one day. Next, the yarn (length = (L
5)) was elongated by 100% (length = 2 × (L5)). The length was treated with steam at 115 ° C. for 1 minute. Further, at the same length, dry heat treatment at 130 ° C, and at the same length,
It was left at room temperature for one day. Next, the stretched state of the yarn was removed, and the length (L6) was measured. Heat setting property = 100 × ((L6) − (L5)) / (L
5) [Quantitative method for polyvinylpyrrolidone] 5 ml of dimethylacetamide was added to 100 mg of a yarn sample to dissolve the yarn. 20 ml of ethanol was slowly added to the resulting solution to reprecipitate the polyurethane component. The solution components were analyzed by high performance liquid chromatography. For the quantification of polyvinylpyrrolidone, a calibration curve was prepared in advance using a polyvinylpyrrolidone solution whose concentration was determined and used. The polyvinylpyrrolidone content was determined by the following equation.

Polyvinylpyrrolidone content (% by weight) =
(Sample peak area / Calibration curve peak area) × Calibration curve sample amount / Yarn sample weight [Applied pressure] Measurement was performed at a frame size of 3 using HATRA MK-2A. [Wearing Feeling] Ten sample panelists were allowed to wear for 5 days (8 hours or more / day), and a questionnaire was taken. [Elongation] A tensile tester modified so that the upper chuck was a hanger and the lower chuck was sandwiched between the toe, leg, and panty portions of the pantyhose. Upon measurement, as a control, the length of the pantyhose except for using non-coated elastic yarn used was prepared under the same conditions in the present invention was L _0. Distance between an upper chuck and the lower chuck was L _O × 0.5 in accordance with the control. Using such a tensile tester, the knitted fabric was pulled 30 cm at a speed of 50 cm / min and returned to the original position at the same speed. In this series of operations, a change in stress with respect to the elongation recovery was observed. The stretchable knitted fabric stretched with low stress, and the stretchable knitted fabric stretched with high stress. The change in stress with respect to this elongation recovery was drawn as a hysteresis curve, and the slope of this curve was used as an evaluation index of elongation. Furthermore, evaluation was performed together with a questionnaire result regarding the ease of growth of 10 sample panelists. [Example 1] PTMG and MDI having a molecular weight of 1600 were CR
The mixture was charged to a container to a value of 1.6 and reacted at 80 ° C. for 4 hours. Then, the reaction product was dissolved in dimethylacetamide, and then ethylenediamine and diethylamine were added to the solution to obtain a polyurethane solution. . Solution concentration is about 35
% By weight. 2000 kg of this solution PV manufactured by Kanto Chemical
140 g of a dimethylacetamide solution (35% by weight) of P (K = 30) was added and stirred for 2 hours to obtain a sample solution. The resulting solution was dry-spun at a speed of 540 m / min with a speed ratio of a god roller and a winder of 1.20 to obtain a 40 denier spandex yarn. Table 1 shows the elongation, strength, setting property, stress relaxation, heat setting property, PVP content, and melting point of this yarn. The obtained yarn had a high heat setting property.

Around this spandex yarn, using a commercially available temporary twisting machine, nylon 6 (7
Using d-5f), it was wound to obtain a coated yarn.

The knitted pantyhose was knitted using the obtained coated yarn, and the dimensions were larger than those of the conventional zocchi pantyhose, and the wearing pressure was not higher than that of the conventional product. I was able to.

[0087]

[Table 1] ★ [Example 2] The same polyurethane solution 200 as in Example 1
To 0 kg, 180 g of the PVP of Example 1 was added and stirred for 2 hours to obtain a sample solution. The obtained solution was 540 m / at a speed ratio of a god roller and a winder of 1.2.
By spinning at a speed of minute, a 40 denier spandex yarn was obtained. Table 1 shows the elongation, strength, setting property, stress relaxation, heat setting property, PVP content, and melting point of this yarn.

Around this spandex yarn, using a commercially available temporary twisting machine, nylon 6 (7
Using d-5f), it was wound to obtain a coated yarn.

The knitted pantyhose was knitted using the obtained coated yarn. The dimension was larger than that of the conventional zocchi pantyhose, and the wearing pressure was not higher than that of the conventional product. I was able to. [Example 3] The same polyurethane solution 200 as in Example 1
PVP (G) obtained by copolymerizing 10% of N-butenyl-2,4-di (1-butenyl) -2-pyrrolidone manufactured by ISP with 0 g.
140 g of a dimethylacetamide solution (ANEX P-904) (35% by weight) was added and stirred for 2 hours to obtain a sample solution. The resulting solution was dry-spun at a speed of 540 m / min with a speed ratio of a god roller and a winder of 1.20 to obtain a 40 denier spandex yarn. Table 1 shows the elongation, strength, setting property, stress relaxation, heat setting property, PVP content, and melting point of this yarn.

Around this spandex yarn, using a commercially available temporary twisting machine, nylon 6 (7
Using d-5f), it was wound to obtain a coated yarn.

The knitted pantyhose was knitted using the obtained coated yarn. The dimension was larger than that of the conventional zocchi pantyhose, and the wearing pressure was not higher than that of the conventional product. I was able to. [Comparative Example 1] The properties of a yarn obtained by spinning the same polyurethane solution as in Example 1 under the same conditions as in Example 1 except that PVP was not contained are shown in the table. The yarn had a low heat setting property.
Using a commercially available temporary twisting machine, nylon 6 (7d-5f) was wound around the spandex yarn as a non-elastic yarn to obtain a coated yarn.

The knitted pantyhose was knitted using the obtained coated yarn, the placement size was larger than that of the conventional zocchi pantyhose, and the wearing pressure was not higher than that of the conventional product. I was able to.

[0093]

According to the knitted fabric of the present invention, particularly when used for clothes, it is possible to obtain a knitted fabric excellent in fit, appearance quality, wearability, wear feeling, elongation and the like. Because of these excellent properties, in addition to use alone, in combination with various fibers, for example, socks, stockings, circular knit, tricot, swimwear, ski pants, work clothes,
Tightening materials for various textiles such as fireworks, clothes, golf pants, wet suits, brassiere, girdle, gloves, socks, etc.
It can be applied to various uses such as artificial flowers, electric insulating materials, wiping cloths, copy cleaners and gaskets.

Claims (2)

[Claims] (1) a polyvinylpyrrolidone and / or a copolymer thereof, wherein the K value of the polyvinylpyrrolidone and / or the copolymer is 20 to 70,
A knitted fabric characterized in that the main component comprises a spandex yarn made of polyurethane urea. 2. The method according to claim 1, wherein the polyvinylpyrrolidone and / or its copolymer is contained in the spandex yarn in an amount of 0.5% by weight or more.
The knitted fabric according to claim 1, wherein the knitted fabric is contained in a range of not more than weight%.