JPH01156501A - Panty stocking - Google Patents

Abstract

PURPOSE: To provide a panty stocking excellent in see-through effect and fitness by using polyamide-based nonhelical crimped yarns having interlaced bundle portions and crimped portions in the longitudinal direction and having a crimp shape factor of specific level or lower. CONSTITUTION: This panty stocking is obtained from polyamide-based nonhelical crimped yarns having both interlaced bundle portions 12 and crimped portions and having a crimp shape factor defined by the ratio: crimp extension percentage/number of crimps of <=0.5, and thus needing no alternate twisting. Other parameters of the above yarns include: the number of the interlaceed bundle portions is 10-40 counts/m; there exist 0 to 2 small loops 13 <=1mm in length in each of the bundle portions; and the length of each of the crimped portions is 5-70mm.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to an electronic storage stocking with excellent transparency and fit.

[Conventional technology]

Conventionally, as thermoplastic synthetic fibers constituting pantyhose, so-called inelastic thermoplastic synthetic fibers such as nylon 6 and polytetramethylene terephthalate, torque type or woolly type false twisted yarns have been used. Although the pantyhose obtained from the torque type have excellent transparency, they are inferior in fit to the feet when worn, such as those made from walnut fixing.

On the other hand, the woolly type has excellent fit but is inferior in transparency.

In order to achieve both fit and transparency, JP-A-58
In Japanese Patent No. 132101, an attempt is made to alternately arrange textured yarns in the S direction and the Z direction for each of torque yarn and woolly yarn. However, torque yarn
There is a difference in dyeability between the coolie yarns, and when made into a product, the same color is poor.

(Problems to be Solved by the Invention) An object of the present invention is to provide a panty stretcher that is homogeneous, transparent, and has excellent fitting properties without the need for alternate twisting.

(Means for Solving the Problems) That is, the present invention consists of a polyamide non-swirling wound yarn having an interlacing convergence portion and a crimped portion in the yarn length direction and having a wrinkle of 0.5 or less. They are pantyhose.

The pantyhose of the present invention is transparent and has excellent fitting properties, and since it is made of the same polyamide non-rotating crimped yarn, there is no difference in dyeability.

Furthermore, since the torque type and woolly type are twisted, they must be knitted by alternately twisting in the S direction and twisting in the Z direction to prevent the knitted fabric from becoming diagonal. In the case of curly yarn, it is used without twisting, so it has the advantage that slanting does not occur.

The polyamide fiber used in the present invention may be any polymer having an amide bond in its main chain, such as nylon 4, nylon 6, nylon 8, nylon 10, nylon 46,
Examples include polyamide fibers such as nylon 66 and nylon 6/10.

The polyamide multifilament yarn used as a raw material in the present invention is melt-spun at a winding speed of 400
It is a partially oriented yarn drawn at a high speed of 0 yn/min or more. This yarn has a low heat shrinkage of 4% or less as expressed by water production shrinkage, and preferably has an initial Young's modulus of 10.
0? /d or less. Partially oriented yarn drawn at a winding speed of 4,000 m/min or more may be used in advance or after being stretched by cold stretching or hot stretching to 2 times or less, preferably 1.6 times or less, before entering the air jet stream. is also possible.

Furthermore, it is also possible to use a yarn that has been given crimp characteristics in advance by giving minute cooling spots in the yarn length direction when spinning at 4000 m/min or more. Since it already has crimp characteristics, it is assumed that the crimp shape factor will be further increased.

If the yarn is formed at a spinning winding speed of less than 4000 m/min, the elongation at break of the yarn must be as high as so% or more, and the yarn cannot be subjected to the relaxation treatment after the entangling treatment described later. Subsequent elongation treatment is not preferable because the fibers themselves elongate, making it difficult to eliminate the loops. On the other hand, 4o
It is also possible to reduce the initial Young's modulus at the same time as reducing the water-making shrinkage rate by drawing the filament yarn obtained at a take-up speed of less than oom/min. This is undesirable as it causes problems with hair growth and fluffing.

The entangling treatment with air jets in the elongation step is carried out by means of known injection nozzles used in the production of loop-entangled crimped yarns.

The flow shape of the air jet stream is determined by the denier and cross-sectional shape of the thread to be processed, the feed rate of the nozzle, such as the angle of air introduction, and the number of holes.

Then, processing conditions such as air pressure, overfeed rate, nozzle shape, etc. are adjusted so that the degree of entanglement is such that loops and intertwined portions can be eliminated by elongation treatment after relaxation heat treatment, which will be described later.

The relaxation heat treatment is performed at the same time as or immediately after the entanglement treatment using the air jet flow described above, but for continuous treatment, it is preferably performed while the yarn is running using a heater. The type of heater may be either a contact type or a non-contact type, and this heat treatment increases the thermal stability of the yarn, but it also increases the interlace strength of the interlaced convergence part and reduces the loop disappearance effect during the subsequent elongation process. It is necessary to choose conditions that will not cause any damage.

A suitable apparatus for carrying out the described method is shown in FIG.

The yarn introduced from the package h of partially oriented polyamide yarn obtained by the above-mentioned high-speed spinning to the known air injection nozzle 3 via the delivery roller 1 is not auto-safe-edged between the roller 1 and the roller 2. Loops and fuzz occur as a result of the interlacing process.

The oat safe yield rate is preferably 6-40%, and the air pressure is 3-40% depending on the characteristics of the feed material and the speed of curing.
10 Kq/cm"G is used.

Entanglement treatment with air injection nozzle O/SafeEid rate is 6
% or less, the opening of the filaments will be insufficient, the entanglement will be insufficient, and the number of crimps in the resulting crimped yarn will be small, which is not preferable.

On the other hand, when the oat safe yield rate is 40% or more, there are many loop fluffs and strong entanglement, and there are few crimped parts and there are many remaining loop fluffs, and the decontamination is insufficient in the stretching treatment after relaxation heat treatment. I don't like it.

Next, the yarn is passed between rollers 2 and 4, and then subjected to a relaxing heat treatment by a heater 5, thereby fixing its shape by heat. At this time, the yarn tension inside the heater is 0.
．． Set the feed rate so that it is 1 t/d or less.

However, since the above-mentioned thread thread is thermally stable, this relaxing heat treatment also prevents it from shrinking excessively and increasing the interlacing strength of the interlacing convergence portion. Note that this relaxation heat treatment can also be performed simultaneously with the entanglement treatment using the air jet flow using hot air.

If the tension in the relaxation heat treatment heater increases beyond 0.1 f/d, the entanglement fixation will not be strong, and the entanglement cannot be removed by the elongation process between the rollers 4 and 6, and a large amount of loop fuzz will remain. , and it is not preferable to have many intertwined parts.

The relaxation heat treatment is carried out at a temperature of 150° C. or higher and lower than the melting point at which the filament entanglement can be fixed in shape.

Next, the yarn is under-fed between rollers 4 and 6 and subjected to elongation processing, whereby some of the loops and interlaced convergence portions generated during the interlacing processing are elongated and eliminated, making crimp latent. do.

The tension of the elongation process is 0.5 t/d or less, and a jet nozzle is used so that a part of the entangled convergence part is elongated and erased.
Adjust air pressure, injection feed rate, relaxation treatment temperature, underfeed rate, etc.

The elongation treatment tension after the relaxation heat treatment is preferably 0.5 f/d or less, preferably 0.3 f/d or less to eliminate the entangled portions.

If the elongation treatment is performed with a tension higher than o, s t/a, the filament will break and cut fuzz will occur, which is not preferable.

As mentioned above, it is necessary to set the stretching, injection, relaxation heat treatment conditions, etc. of the supply system so that the stretching tension is 0.5 f/d or less. Finally, it is taken up as a cage B onto the winding drum 7.

The yarn of the present invention thus obtained is a non-turnable crimped yarn that does not have large loops but instead has fine crimps, and has a water production shrinkage rate of 1 to 2%. It has excellent thermal stability and a fringe shape factor of 0.5 or less. In addition, the number of intertwined and focused parts in which each component filament is intertwined and focused is 10 to 40.
There are 0 to 2 small loops with a length of 1 or less in each interlacing convergence part, and the length of the crimped part other than the interlacing convergence part is 5 to 70 degrees. It is of a new configuration within the range of .

The outline of the form of this yarn is shown in FIG. In the figure, numeral 11 is a constituent filament, 12 is an interlacing convergence part, and 13 is a loop.

The features of the present invention will become clearer from the following examples.

In addition, the yarn was evaluated according to the following procedure.

Water production shrinkage rate: Based on JI8 L1073-6/12 "hot water shrinkage rate" measurement method.

Initial Young's modulus: Based on JIS L1073-6.10 "Initial tensile resistance" measurement method.

Number and length of entangled convergence parts: An initial load of 0.1 f/'d is applied to the yarn to be tested, and the yarn length of 50α is marked at two points above and below. Next, divide the multifilament yarn into two at the upper mark point, and then divide the multifilament yarn into two parts at 30mm. hang a hook of weight and let it fall under its own weight,
At the point where it stopped, move the hook directly below it and make it 50
Repeat over the entire length of cm. The number of stopping points corresponds to the number of confounding convergence parts. Also, measure the length at that point and use it as the length of the core.

Crimp elongation rate: According to JI8 L1077-s.7 nylon filament bulky yarn test method.

Number of crimp: According to JI8 L1074-6/11/1 synthetic fiber staple test method.

(Example) A package of 15 d 15 f of nylon 66 filament yarn was formed at a spinning winding speed of 4000 m/min, and the package was placed in the apparatus shown in FIG. 1 to perform the processing of the present invention. Processing speed 600m/min, air injection pressure 6V'cIn''G.

Injection-treated oat feed rate 13.5%, relaxation heat treatment oat safe yield rate 5.3%, heat setting temperature 210℃,
``J'Jr'r%'rL I&)54-8<
? "Th-y r knee crimp elongation rate 3.4%, number of crimps 11/inch, crimp shape factor 0.31ζ"Acchoco.

Using this non-rotating crimped yarn, KTS manufactured by Mizuta Seiki Co., Ltd.
Pantyhose were knitted using four knitting machines at a speed of 900 tpm. (This is called A.) 1500ff for comparison
Nylon 6 obtained by winding at a winding speed of l/min and then stretching
6 filaments 15 d15 f yarn at spindle rotation speed 4a'? 'pm, number of twists 5500'r/M, heater temperature 200°C, feed rate -2%, winding rate 10% to obtain woolly live textured yarn, S direction twist, 2
Pantyhose were knitted by alternating twist directions. (This is referred to as B.) Next, nylon 66 filament 15d/3f yarn spun in the same manner as B was spun at a spindle rotation speed of 400,000 rpm, a twist number of 1500 T/M, a heater temperature of 200°C, and a feed rate of -2%. A torque type processed yarn was obtained by false twisting at a winding rate of 10%, and pantyhose were knitted by twisting in the S direction and twisting in two directions alternately.

(This is referred to as C.) After dyeing A, B, and O and setting the foot shape, the transparency and fit when worn were compared.

[Effects of the Invention] The pantyhose obtained using the crimped yarn of the present invention as described in detail above has superior transparency and fit compared to conventional pantyhose. Uniform pantyhose can be obtained without the need for alternating twists, which is the case with ordinary swirling yarns.

[Brief explanation of the drawing]

FIG. 1 is a schematic view showing an example of an apparatus suitable for carrying out the method of the present invention, and FIG. 2 is an enlarged view showing the form of a crimped yarn according to the present invention. 1.2, 4.6... Roller, 3... Air injection nozzle, 5... Heater, 7... Winding drum, 11...
Filament, 12... entangled convergence part, 13... loop.

Claims (1)

[Claims] Non-rotating polyamide that has an interlaced convergence part and a crimp part in the yarn length direction, and has a crimp shape coefficient crimp number (N) defined by crimp elongation ratio (CE) of 0.5 or less Pante yeast fitting made of crimped thread