JPH02133601A - Stocking - Google Patents

Abstract

PURPOSE:To obtain a tightened stocking excellent in transparency and durability by alternately knitting at every course a special covered yarn and polyamide multifilament yarn or its textured yarn. CONSTITUTION:At least leg portion of a stocking is alternately knitted at every course with (A) a covered yarn prepared by covering the periphery of the core of 10-30d elastomeric yarn with at least one polyamide multifilament yarn 0.5-3.0d in single fiber fineness, 5-20d in total yarn fineness, 3.0-4.5 in relative viscosity and 6.0-9.5g/d in breaking tenacity, (B) polyamide multifilament yarn 1.0-7.0 in single fiber fineness, 5-20d in total yarn fineness, 3.0-4.5 in relative viscosity and 6.5-9.5g/d in breaking tenacity, or its textured yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to stockings with excellent transparency and durability.

(Conventional technology) Stockings that put moderate tension on the ankles, calves, thighs, and hips to relieve fatigue and improve cosmetic appearance are usually made of nylon multifilament yarn with physical properties.
Alternatively, it can be obtained by inter-knitting the processed yarn with a covered yarn in which a polyurethane synthetic fiber yarn is wound with a nylon multifilament yarn having normal physical properties. However, if the stockings are made thicker to increase their strength, they lose their transparency, and on the other hand, if the threads are made thinner to achieve transparency, their strength decreases, resulting in good transparency and strong strength. It was not possible to obtain stockings that had a strong and tight feel.

(Problems to be Solved by the Invention) An object of the present invention is to obtain stockings that have excellent durability and tightness in spite of their excellent transparency.

(Means for Solving the Problems) In the present invention, at least the leg portion has a core yarn of 10 to 3
Relative viscosity (RV) of 0 denier gono-like elastic fiber yarn, single yarn denier of 0.5 to 3.0 denier J as covering yarn, and total denier of 5 to 20 denier.
3.0-4.5, breaking strength (DT) 8.0-9.5g/
A covered yarn formed by arranging at least one polyamide synthetic fiber multifilament yarn of d, a single yarn denier of 1.0 to 7.0 denier, and a total denier of 5 to 5.
・20 denier, relative viscosity (RV)/) (3,
0-4.5, breaking strength (DT) 6.0-9.5g/d
These stockings are made of polyamide-based synthetic fiber multifilament yarns or processed yarns alternately knitted in each course. In the present invention, the rubber-covered elastic fiber yarn constituting the core yarn of the covered yarn includes natural rubber, synthetic rubber, polyurethane-based synthetic fiber yarn, butadiene rubber fiber yarn, etc., but polyurethane-based synthetic fiber yarn is preferable. It is. The fiber thickness needs to be 10 to 30 deniers, more preferably 10 to 20 deniers.
It is denier. If the fiber thickness is less than 10 denier,
Sufficient tension cannot be obtained, and if it exceeds 30 denier, the thickness of the covered thread becomes too large, and the tension is too strong, which is good. . Examples of polyamides constituting the covering yarn of the covered yarn and the polyamide synthetic fiber multifilament yarn to be knitted with the covered yarn include polycaprolactam (nylon 6), polyhexamethylene adipamide (nylon 6.8), Polyhexamethylene adipamide (nylon 6.10), polytetramethylene adipamide (nylon 4.6), copolymers of these polyamides and 1,4-cyclohequinane bismedylamine and linear aliphatic dicarbonate These include polyamides whose half phase is a condensation product of acids.

Such a polyamide may be blended with a matting agent, a pigment, a light stabilizer, a heat stabilizer, an antioxidant, an antistatic agent, a dyeing agent, an adhesion improver, etc., as required. The polyamide fiber yarn constituting the covering yarn of the covered yarn has a single yarn denier of 0.5 to 3.0 denier, more preferably 1.0 to 2.0 denier. ．． It must be 5 denier, and the total denier must be S to 20 denier.
More preferably, it is 5 to 10 deniers. When the single yarn denier exceeds 3.0 denier, the number of filaments decreases, the soft texture is lost, and the texture feels rough and hard, which is unsuitable. Also, if the single yarn denier is less than 0.5 denier, the number of filaments will be too large,
This is not preferable because transparency and durability are lost. Also,
The polyamide synthetic fiber yarn constituting the covering yarn of the covered yarn must have a relative viscosity (RV) of 3.0 to 4.5 and a breaking strength (DT) of 6.0 to 9.5 g/d. It is. When the breaking strength is 6.0 to 9.5 g/d, sufficient strength can be obtained even if the denier of the yarn is made thinner, and the durability of the stockings can be maintained.

Relative viscosity (RV) is 3.0-4.5, breaking strength (DT)
is 6.0-9. 5g/d polyamide synthetic fiber is
It is obtained by melt-spinning a polyamide having a relative viscosity of 3.0 to 4.5 and then stretching it. Of course, it can also be obtained by a direct spinning/drawing method. If this is spun by increasing the relative viscosity, the post-elongation rate will be large at the conventional spinning speed, making winding impossible. Therefore, the winding speed is preferably 1000 to 4000 m/min, more preferably 1500 m/min. ~2000m/min. In this case, the orientation of the undrawn yarn progresses, and △n=20~eo
It will be xio-3. When the undrawn yarn is cold-stretched or hot-stretched at a stretching ratio of 1.7 times, the breaking strength is 6.0 to 9.
High tenacity polyamide fibers with extremely high strength of 5 g/d are obtained. The covering yarn is wound around the core yarn to form a covered yarn, and the winding direction may be right-handed, left-handed, or X-shaped.

The number of windings is preferably 1500 to 3000 T/M. On the other hand, the polyamide synthetic fiber yarn inter-knitted with the above-mentioned covered yarn has a relative viscosity (RV) of 3.0 to 4.5 and a breaking strength (DT) of 6.0 to 9.5 g/d. It is necessary. By inter-knitting such high-strength polyamide fiber yarns, sufficient strength can be obtained even if the denier of the yarns is reduced, and the durability of the stockings can be maintained. The polyamide synthetic fiber has a relative viscosity (RV) of 3.0 to 4.5 and a breaking strength (DT) of 6.0 to 9.5 g/d,
It is obtained in the same manner as the covering yarn of the covered yarn described above.

The polyamide synthetic fiber may be used as a flat yarn, or may be false-twisted under normal false-twisting conditions and used as a textured yarn. In this case, conditions similar to those for false twisting of ordinary knitting yarn for stockings can be selected. The fiber yarn inter-knitted with the cover l' yarn needs to have a single yarn denier of 1.0 to 7.0 denier, a total denier of 5 to 20 denier, and a single yarn denier of 2 to 6 denier. Torque denier is 7-15
Denier is more effective.

The stockings of the present invention have a covered yarn with a relative viscosity (RV) of 3.0 to 4.5 at least in the leg portion, and
A polyamide synthetic fiber multifilament yarn with a breaking strength (DT) of 7'+ (8.0 to 9.5 g/d) is
It is obtained by alternately knitting each course. The toe portion other than the leg portion may be knitted using the same thread as the leg portion, or
It may be knitted using only nylon yarns having normal physical properties, only polyamide-based synthetic fiber yarns specified above, or a combination of both yarns.

In the present invention, relative viscosity and breaking strength refer to values measured by the following method.

Relative viscosity: 96.3 ± 0° A sample solution was prepared by dissolving the sample in 1 wt % reagent special grade concentrated sulfuric acid so that the polymer concentration was 10 mg/1Ilf, and placed on ice at a temperature of 20°C ± 0.05°C. The relative viscosity of the solution is measured using an Ostwald viscometer with a fall time of 6 to 7 seconds. During the measurement, the same viscometer was used and the falling time T of sulfuric acid at 20°C was the same as when preparing the sample solution. (seconds) and the falling time T1 of the sample solution 20'C.
(seconds), the relative viscosity RV is calculated using the following formula.

RV=T, /T.

The breaking strength of the yarns is unweaved from the stocking legs, and each yarn is measured using Tensilon manufactured by Toyo Baldwin. However, the present invention is not limited to these examples.

Example 1 Nylon resin with a relative viscosity (RV) of 3°55 was spun as a covering yarn at a spinning speed of 500 m/min, and the breaking strength (D T
) is 1. '5g/d high strength nylon multifilament yarn 7 denier 5 filament, spandex filament yarn 20 denier as core yarn, spandex draft set to 3.3 times, first twist 2800T
/M, ply twist 2100]゛/M covered yarn double covered in an X-shape The above covering yarn and a high tenacity nylon multifilament yarn obtained by the same method 12 denier 3 filament cross-knitted yarn were knitted using the number of needles. 400 caliber 4"
Each course was alternately knitted at a ratio of 1:1 using a stocking knitting machine to obtain stockings.

Comparative Example 1 Nylon multifilament yarn (
Relative viscosity RV: 2.55, breaking strength DT: 5. Og/
d) Using 7 denier 5 filament, 20 denier spandex filament yarn as the core yarn, the spandex draft was set to 3.3 times, and double covering was carried out in an X-shape at 2800 T/M for both the first twist and the first twist. Relative viscosity (RV) is 3.5 as covered yarn and interlaced yarn.
Breaking strength (DT) obtained by spinning the nylon resin No. 5 at a spinning speed of 1500 m/min and cold stretching at a draw ratio of 1.7 times.
Stockings were obtained by inter-knitting high-strength nylon multifilament yarn of 7.5 g/d with 12 denier 3 filaments in the same manner as in Example 1.

Comparative Example 2 A regular nylon resin with a relative viscosity (RV) of 2.55 was spun at a spinning speed of 750 m/min as a covering thread, and cold-stretched at a draw ratio of 3.5 times, resulting in a breaking strength (DT) of 5.
．． Using a 10 denier 5 filament nylon multifilament yarn with normal physical properties of 0 g/d, using a 20 denier spandex filament yarn as the core yarn, and setting the spandex draft to 3.3 times, lower F, & 24
Stockings were obtained by inter-knitting covered yarn double-covered at 00 T/M and 1800 T/M and 15 denier 3 filament nylon filament yarn with normal physical properties in the same manner as in Example 1.

Comparative Example 3 A regular nylon resin with a relative viscosity (RV) of 2.55 was spun at a spinning speed of 750 m/min as a covering thread, and cold-stretched at a draw ratio of 3.5 times, resulting in a breaking strength (DT) of 5.
．． Using nylon multifilament yarn 7 denier 5 filament with normal physical properties of 0g/d, using spandex filament yarn 20 denier as the core yarn, setting the spandex draft to 3.3 times, and first twisting 2800T.
Stockings were obtained by inter-knitting a double-covered covered yarn of 2100 T/M and a 12-denier 3-filament nylon multifilament yarn with normal physical properties in the same manner as in Example 1.

The stockings obtained in Example 1 and Comparative Examples to Comparative Examples 3 were evaluated for transparency, strength of the covered yarn, strength of the nylon multifilament yarn knitted with the covered yarn, and wear durability (durability). Results first
Shown in the table.

Table 1 As is clear from Table 1, Comparative Example 1 had excellent transparency, but was slightly inferior in wear durability. Comparative Example 2 achieved a certain degree of yarn strength by increasing the fineness, but was inferior in transparency. Comparative Example 3, in which the yarn used was the same as Example 1, had excellent transparency, but had low yarn strength and poor wear durability.

Example 1 of the present invention had excellent durability and transparency, and was aesthetically pleasing and elegant.

However, the transparency was visually judged by 50 people in the worn state and in the packaged state, and each judged which one was transparent. Furthermore, the useful life is the average number of days that 50 monitors wear the product every day during normal office work and wash it at home every day until it becomes torn and can no longer be worn.

(Effects of the Invention) Although the stockings of the present invention have transparency and aesthetics, they are extremely strong and have a moderate tightness.

Claims (1)

[Claims] (1) At least the leg portion has a rubber-like elastic fiber yarn of 10 to 30 deniers as a core yarn, a single yarn denier of 0.5 to 3.0 deniers and a total denier of 5 to 20 deniers as a covering yarn. Relative viscosity (RV) 3.0~
4.5, at least one polyamide synthetic fiber multifilament yarn with a breaking strength (DT) of 6.0 to 9.5 g/d
The covered yarn and the single yarn denier are 1.
Polyamide-based material with a total denier of 0 to 7.0 denier, a total denier of 5 to 20 denier, a relative viscosity (RV) of 3.0 to 4.5, and a breaking strength (DT) of 6.0 to 9.5 g/d. Stockings characterized in that synthetic fiber multifilament yarn or processed yarn thereof are alternately knitted in each course.