JPS60185802A - Panty stocking or stocking - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to pantyhose or stockings (hereinafter both will be collectively referred to as stockings) that have excellent transparency and durability.

Conventionally, as thermoplastic synthetic fibers constituting stockings, torque-type or woolly-type false twisted yarns of so-called inelastic thermoplastic synthetic fibers such as nylon 6, nylon 66, and polytephmethylene terephthalate have been used.

The necessary characteristics of stockings include durability, fit,
Transparency and fine detail are very important properties.

Stockings knitted with torque-type false twisted yarn have excellent transparency but poor fit, while stockings knitted with woolly type false-twisted yarn have excellent fit. Transparency was poor. As a measure to improve transparency in woolly type.

Studies have focused on reducing the number of filaments and reducing the total fineness, but when considering durability when worn, it is recommended to reduce the number of filaments and reducing the total fineness in conventional stockings. There were, of course, limits to this. That is,
Transparency and durability were contradictory.

In addition, there was a limit to the use of non-elastic thermoplastic polymer as a single material in improving the fit of the torque type.As a result of intensive study by the present inventors, taking into account the above circumstances, we found that: In terms of durability, 1 strength is 70 f/'
If the stockings become loose, they will be damaged when putting on and taking them off or during long-term continuous use. Therefore, it is essential that the knitting yarn for stockings has a strength of at least 70 f/y or higher, and in terms of transparency, We discovered that a total fineness of 13 to 20 deniers is an essential requirement.Therefore, we developed a false-twisted yarn made of high-strength polyamide fibers and used dazzling yarn as knitting yarn for stockings, thereby achieving transparency and durability. I got stockings that worked well.That is.

One of the important features of the present invention is that the knitted yarn constituting the stockings is a false twisted yarn made of the high-strength polyamide fiber.

The present invention provides pantyhose or at least the leg portions of stockings made of polyamide synthetic fibers having a relative viscosity of 2.8 or more, a total fineness of 13 to 20 deniers, and a filament count of 1 to 8. Bantei stocking mata is a stocking characterized by being knitted using false twisted yarn with a yarn tenacity of 70 f/y or more as the main knitting yarn.

Hereinafter, one aspect of the present invention will be explained in detail.

Polyamide, which is the raw material for the fiber intended in the present invention, is heated at 20°C.
Polymer concentration 10”f/II in 96% concentrated sulfuric acid solution
/If the relative viscosity measured with 2.8 or more is obtained,
polycaprolactam, polyhexamethylene adipamide,
Polyhexamethylene sepacamide.

There are copolymers of these polyamides and polyamides containing as additives a condensation product of 1,4-cyclohexanebis(methylamine) and fIIL aliphatic dicarboxylic acid. Such polyamides can be blended with matting agents, pigments, light stabilizers, heat stabilizers, antioxidants, antistatic agents, dyeability improvers, adhesion improvers, etc. as necessary. All can be used, except those that have a serious adverse effect on the characteristics of the present invention depending on how they are blended.

The method for manufacturing the knitting yarn used in the stockings of the present invention will be described in more detail. At least the leg portions of the stockings of the present invention are made of polyamide synthetic fibers having a relative viscosity of 2.8 or more. Specifically, the polyamide fibers constituting the stockings of the present invention are obtained by melt-spinning polyamide having a high relative viscosity, which is then stretched, whereas conventional polyamides have a relative viscosity of at most 2.5. Ru. Of course, it can also be produced by a direct spinning/drawing method. If a polyamide with a relative viscosity of less than 2.8 is used, the total fineness will be 13 from the viewpoint of durability, which is an essential requirement of the present invention.
If it is less than 1 denier, it is difficult to obtain the yarn strength of 70 f'/y required for durability even if the relative viscosity is within the range of the present invention. In addition, it is possible to increase the strength of the yarn by increasing the total fineness, but if it exceeds 20 denier, the durability will improve, but the transparency will decrease significantly, and it is not practical to use it in sagging areas. .

In addition, in the present invention, the number of filaments constituting the thread is 1 to 8.
I need a book. When the number of constituent filaments is 1 to 3, it is a torque type, and when there are 4 to 8 filaments, it is a woolly type. When the number of constituent filaments is 1 to 3, the number of Snarls is preferably 50 to 1000 pieces/27z. If the number of filaments exceeds 8, it is not preferable because the transparency of the stockings is significantly reduced and disadvantages such as twitching are likely to occur.

Next, the Hdl method for producing polyamide yarn constituting the present invention will be briefly explained, but the present invention is not limited to the following method.

In producing the polyamide fibers constituting the present invention, the spinning and drawing process, particularly the spinning process, is important.

That is, when melt-spinning a polyamide with a relative viscosity of 2.8 or higher, for example, the birefringence of the resulting undrawn yarn becomes larger than that of a conventional polymer with a relative viscosity of 2.5, which increases post-elongation during spinning. It is difficult to wind for a long time. Therefore, the spinning speed is significantly increased compared to the conventional conditions.
From the viewpoint of productivity, it is also preferable to obtain an undrawn yarn having a birefringence of 0.028 or more at a spinning speed of m/min. When the undrawn yarn thus obtained is drawn either continuously after spinning or after being wound once, high-strength capolyamide fibers can be obtained in exactly the same steps as conventional methods.

The high-strength polyamide fibers obtained as described above are either subjected to a false twisting process using a normal false twisting process, or stretched with a false twisting process in which two culms are connected to each other by stretching the undrawn yarn. False processing is carried out using a false twisting machine, and conditions similar to those for ordinary stocking yarn composition can be selected.

The high-strength polyamide fiber yarn that is the knitting yarn for the stockings of the present invention has been described in detail above, but one of the more important requirements in the present invention is that the total fineness of the knitting yarn for the stockings is 13 to 20 deniers. , and the number of filaments is 1 to 8.

It is a false twisted yarn having a yarn tenacity of 70y/y or more. Stockings are knitted using front bar and sheath knitting yarns, but the five composition methods may be circular knitting or full fashion thin knitting. Furthermore, in the stockings of the present invention, at least the leg portions are knitted with the knitting yarn made of the above-described high-strength polyamide fibers, but the other portions, ie, the pants portion, the ankle portion, the heel portion, the sole portion, and the toe portion are knitted with the knitting yarn made of the above-described high-strength polyamide fiber. From the viewpoint of dyeing and post-processing, it is preferable to select a polyamide fiber yarn having a relative viscosity of 100% and a total number of filaments suitable for each part, but it may be knitted with other yarns depending on the part. Alternatively, the knitting yarn may be mixed with other fiber yarns.

Hereinafter, the configuration and effects of the present invention will be explained with reference to examples, but the present invention is not limited by the following examples.

Example: Polycaproamide with a relative viscosity of 3.4 was melted at 280°C and discharged at 5.0 m/min using a spinning nozzle in which 5 pores with a diameter of 0.30 IIm were bored. ” 2 extruded 1800nl
The undrawn yarn was wound at a spinning speed of / gin and then cold-stretched to 1.7 times, and then false-twisted under the following false-twisting conditions to obtain a 15-denier, 5-fiber false-twisted yarn.

False-twisted body: polyurethane friction disk False-twisting temperature: 180°C False-twisting speed: 700 tn/side The physical properties of the obtained false-twisted yarn are shown in Table 1. The false twisted yarn was knitted into stockings using a 32-gauge knitting machine, and a wear test was performed.

Table 1 As a comparative example, stockings knitted using polycaproamide fiber yarn with a relative viscosity RV of 2.5 were also tested at the same time, and the wear resistance, tearing rate, and transparency were discussed. did.

The results are shown in Table 2.

As is clear from Table 2, in the stockings of the present invention, although the brand is fine denier,
The wear resistance and tearing rate are the same as the comparative example.
Moreover, the transparency when worn was overwhelmingly superior to that of the comparative example. In Table 2, in the transparency section, ◎ means very good transparency, and △ means slightly poor transparency.

The method for measuring the main parameters used to specify the structure and measure the physical properties of the fibers constituting the present invention will be described below.

<Method for measuring relative viscosity> A sample solution was prepared by dissolving the sample in 96.3±0.1% by weight reagent special grade concentrated sulfuric acid so that the polymer concentration was 10~/ml, and the solution was heated at 20°C±0. The relative viscosity of the solution is measured using an Ostwald viscometer at a temperature of 0.05°C and an ice fall time of 6 to 7 seconds. During the measurement, the same viscometer was used and the falling time To of 20 ml of sulfuric acid was the same as when preparing the sample solution.
(seconds) and the falling time T+ (seconds) of 20 g/sample solution, the relative viscosity RV is calculated using the following formula.

RV=T+/T.

<Method for measuring birefringence (△n)> A Nikon polarizing microscope POH type Ui-sha Berek convenser was used, and a spectral light source activation device (Toshiba 5LS-3-B type) was used as the light source (Na light source). ). 5~
A sample cut on a 6-length fiber axis at an angle of 45°C was
Place the book on the slide with the cut side facing up. Rotate the sample slide glass II〆1. Place the sample on the stage, rotate the stage once to adjust the angle of the sample at 45 degrees with respect to the polarizer, insert the analyzer and make it a dark field, then set the compensator to 30 and count the number of fringes ( n pieces). Compensator scale a is the point at which the sample first becomes darkest when the compensator is turned clockwise, and 11 is at the point where the sample is first darkest when the compensator is turned counterclockwise. Measure the diameter of the sample [After 7 (read both on the 1/10 scale), return the compensator to 30, remove the analyzer, measure the diameter d of the sample,
The birefringence index (Δn) is also calculated using the following formula (average value of 20 measurements).

△n=T, /d (T=nλo4-t) Patent applicant: Toyobo LSI Co., Ltd. ■ Continued Amendment: 1983, 8th Century\3 Ll Commissioner of the Patent Office, Mr. Manabu Shiga],, [Indication of 1981 Patent Application No. 42654 2 Name of Invention Pantyhose or Stockings 8, hli
+!・Relationship with 10 cases of patent applicant Osaka Namboku 1 < Dojima 1 Hei 2 1゛ 2 City 8 υ (: 5t 6) Column 5 of the detailed description of the invention in the Toyobo method company specification, tilt if, Contents (1) On page 4, line 12 of the specification, "Kyo"/ is corrected to "Su".

(2) On page 5, line 9, ``From the aspect of durability, which is an essential requirement,'' is corrected to ``The yarn strength, which is an essential requirement, cannot be obtained. From the aspect of durability.''

Procedure Amendment Written by the Commissioner of the Patent Office Manabu Shiga Patent Application No. 42654 of 1982 Name of the invention Pantyhose or stockings 8 Person making the amendment Relationship to the case Time 1 Applicant 2-2 Dojimahama, Kita-ku, Osaka No. 8 shi) (Color 3) Insert "polytetramethylene adipamide" between "Toyobo Tatehashiki Company xamethylene sebaamide".

(Z) "Example" on page 8, line 9 of the specification is corrected to "1 Example 1."

(8) Insert the following on the next line of page 9, line 2.

"Example 2 Polytetramethylene adipamide with a relative viscosity of 3.0 was
15 in the same manner as in Example 1 except for melting to 0'O.
A false twisted yarn having a denier of 5 filaments was obtained. Table 1 shows the physical properties of the obtained false twisted yarn.

Stockings were formed from the false twisted yarn in the same manner as in Example 1, and a wearing test was performed. (4) Table 1 on the same page is corrected as shown in the following table.

(5) Detail 11'i 9, @ table 2 as shown in the following table.
d1 Correct.

(6) "Examples" on page 10, line 2 is corrected to "Examples 1 and 2."

that's all

Claims (1)

[Claims] (1) Pantyhose or at least the leg portions of the stockings are made of polyamide synthetic fibers with a relative viscosity of 2.8 or more, and have a total fineness of 13 to 20 deniers;
The number of filaments is 1 to 8, and the thread strength is 70.
1. Pantyhose or stockings characterized by being knitted using a false twisted yarn having a f/y or higher knitting yarn as the main knitting yarn.