JP2000045143A - Bulky elastic covered yarn and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a bulky elastic covered yarn having remarkably soft feeling and uniform appearance, and suitable for stockings or the like by covering an elastic core yarn with a specific false twisted, elongated nylon yarn. SOLUTION: This bulky elastic covered yarn is produced by the following steps: (1) producing a false twisted, elongated nylon yarn where waves and coils coexist by subjecting a false twisted nylon yarn having <=3.5 denier filament fineness to stretching treatment at room temperature to 205 deg.C to give >=30% crimp shrinkage percentage defined by the formula (L is the length of a hank when a sample yarn hung from a hook in a state that the yarn is bundled into the hank by being wound around a reel having 112.5 cm circumference by ten times coiling and is loaded with 100 mg/denier at the bottom of the hank for 15 sec; M is the length of the hank when the load is reduced down to 1 mg/denier for 15 sec just after the above measurement) and <=4 hank-twisting number; (2) covering an elastic core yarn with the false twisted elongated nylon yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky coated elastic yarn in which a nylon false twist stretched yarn or a polyester false twist stretched yarn is coated on an elastic yarn of a core yarn, a method for producing the same, and the bulky coated yarn. The present invention relates to a fiber product using an elastic yarn. The bulky coated elastic yarn of the present invention is particularly suitable for stocking applications.

[0002]

2. Description of the Related Art Nylon false twisted yarns are used for a wide range of textiles, including stockings and underwear, because of their excellent stretchability and bulkiness. Of these, stockings are often used as coated yarns for coated elastic yarns. Conventionally, nylon false twisted yarns for coated yarns are mainly provided with a strong crimp having a crimp elongation of about 300%, but are further processed into a bulky or soft material. Ultra-multifilaments having a fineness of single yarn of about 1 denier have been used in order to provide a comfortable feel. Polyester false twisted yarns are also widely used for clothing, but their use in stocking products has been small.

[0003]

The coated elastic yarn using the conventional nylon false twisted yarn as the coated yarn has a problem that, for example, an irritating tactile sensation such as piercing the skin which is considered to be caused by torque twisting. There is a demand for a higher level of bulkiness and a soft touch feeling of the coated elastic yarn. To increase the bulk and provide a soft touch, a small effect can be expected by reducing the number of wrapped twists of the coated yarn.However, to obtain a uniform appearance when worn, increase the number of wrapped twists. It is necessary to prevent the occurrence of coating unevenness and the like, and there are contradicting points. Even if the single yarn fineness of the coated yarn is further reduced, there is a difficult problem in the yarn formability, workability, dyeability, and the like of the coated yarn, so that it is unlikely that an easy solution can be expected. The present inventor has completed research and trial production with the task of improving the bulkiness, tactile sensation, uniform coverage, etc. of a coated elastic yarn by using a conventional nylon false twisted yarn as a coated yarn, and completed the present invention. did.

[0004]

In the past, reworked yarns of nylon false twisted yarns have been used for clothing, but in the case of nylon, low stress elongation, easy deformation of shape, and drape Due to lack of properties, sagging due to wearing or washing, etc., reworked yarn of nylon false twisted yarn is hardly used at present. Particularly, a multifilament yarn having a small fineness is substantially not used because the influence of the above-mentioned drawbacks appears greatly. On the other hand, reworked yarn of polyester false twisted yarn is relatively stiff and used for various applications, but when used as a covered yarn, high temperature heating and pressure dyeing are required for dyeing and finishing set. Therefore, the elastic yarn of the core yarn is liable to be deteriorated, and is only slightly used for a special coated elastic yarn. Very little use is made in the field of women's stockings, where appearance and touch are important.

[0005] However, the reworked yarn of nylon false twisted yarn includes so-called "kitten feel" or "downy hair".
There is an excellent feature that it has an extremely soft touch called "tactile sensation." The present inventor reviewed the reworked yarn of the nylon false-twisted yarn in the above-mentioned research process in order to utilize this feature, and as a result, the reworked yarn of the nylon false-twisted yarn satisfying certain conditions, or By using the same nylon false-twisted yarn as the covering yarn, it has been found that a bulky coated elastic yarn having extremely excellent touch properties and capable of withstanding practical use can be obtained, and a method for producing the same. Was completed. This bulky coated elastic yarn is particularly suitable as a stocking product. Furthermore, the present inventor has also found that if a polyester false-twisted yarn that satisfies certain conditions is used as a covering yarn, it is possible to obtain a tall coated high-elasticity yarn having an extremely excellent touch as in the case of nylon. Was. Hereinafter, the term "nylon false twisted stretched yarn" or "polyester false twisted stretched yarn" refers to a nylon false twisted yarn or polyester false twisted yarn having the following properties that can be used for a coated yarn in the present invention. Means yarn.

According to the present invention, in order to solve the above-mentioned problems, the single yarn fineness does not exceed 3.5 denier, the following crimp shrinkage ratio is at least 30%, and the number of twists M does not exceed 4 times. Further, the present invention provides a bulky coated elastic yarn characterized in that a nylon false twist stretched yarn in a state where a wave and a coil are mixed is used as a covering yarn and is covered with an elastic yarn of a core yarn. In the present invention, the crimp shrinkage is expressed by the equation (1), and the skewing number is a value represented by the following definition.

Crimping shrinkage (%) = {(LM) / L} × 100 (1) where L is a sample yarn having a circumference of 112.5 cm, 10
Wrap the skein in a wound (5 turns if the total fineness exceeds 70 denier), hang it on the hook, and put 100mg on the lower end of the skein
/ Denier is the length of the skein after 15 seconds have passed and M is the length of the skein after the above L was measured and the load was changed to 1 mg / denier immediately after the lapse of 15 seconds. That's it. The number of twists of the skein is the number of twists generated in the skein immediately after the above-mentioned M is measured and the load is changed to no load.

Further, in place of the above-mentioned nylon false twist stretched yarn, the coated yarn has a single yarn fineness of not more than 3.5 denier,
The crimp shrinkage is at least 30% and the number of twists is 4
Polyester stretch false twisted yarn in which a wave and a coil that do not exceed the number of turns are mixed may be used as the covering yarn, and the elastic yarn of the core yarn may be covered. If a particularly soft touch is desired, the elastic yarn may be coated with the total draft ratio of the elastic yarn from 1.4 times to 2.6 times. Furthermore, the bulky coated elastic yarn of the present invention can be multi-coated by using the above-mentioned nylon false twist stretched yarn or polyester stretch false twist yarn as the upper cover yarn, and using another type of yarn as the lower cover yarn. .
Further, another yarn may be plied or plied to the nylon false twist stretched yarn or polyester stretch false twisted yarn, and the elastic yarn of the core yarn may be coated to obtain the bulky coated elastic yarn of the present invention. Further, the present invention provides a textile product characterized in that the bulky coated elastic yarn described in any of the above is used for a portion in contact with the skin.

Next, the present invention relates to a nylon false twisted yarn having a single yarn fineness of not more than 3.5 denier,
Elongation of 4% to 15% at a temperature of 5 ° C., the above-mentioned crimp shrinkage of at least 30%, the number of twists does not exceed 4 times, and nylon false twist elongation in a state where waves and coils are mixed. A method for producing a bulky coated elastic yarn, wherein a processed yarn is obtained, and the obtained expanded processed yarn is coated as a covering yarn on an elastic yarn of a core yarn. Similarly, a polyester false-twisted yarn having a single yarn fineness not exceeding 3.5 denier is subjected to an elongation treatment of 5% to 15% at a temperature of not heating or 210 ° C., and the crimp shrinkage ratio is at least 30%.
%, The number of twists does not exceed 4 times, and a polyester stretched false twisted yarn in a state where the wave and the coil are mixed is obtained.
The present invention provides a method for producing a bulky coated elastic yarn, characterized in that the obtained stretched yarn is coated as a coating yarn on an elastic yarn of a core yarn. In the method for producing a bulky coated elastic yarn, the nylon false twisted yarn or the polyester false twisted yarn is subjected to elongation using a ring twisting winder, and the treated nylon false twisted extended yarn or polyester false twisted. A preferred method is to wind the stretched yarn directly onto a bobbin with a brim for covering to form a covered yarn.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to embodiments. The bulky coated elastic yarn of the present invention has a single yarn fineness of 3.5 denier or less,
The crimp shrinkage is at least 30% and the number of twists is 4
It has a low torque not exceeding the number of turns, and is made of nylon (or polyester) false twist stretched yarn in which a wave and a coil are mixed, and is covered with an elastic yarn of a core yarn. Polyurethane yarn is suitable for the elastic yarn. Generally, a yarn having a denier of 10 to 100 denier is used. The total fineness of the nylon false twisted yarn is preferably about 10 denier to 200 denier, and the number of single yarns may be appropriately selected and used depending on the purpose.

First, a state in which waves and coils are mixed will be described with reference to the drawings. FIG. 1A shows a general crimped form of a nylon (or polyester) false twisted and stretched yarn used for a covering yarn in the present invention, and FIG. 1B shows a general crimped form of a conventional false twisted yarn. The reduced form is enlarged and shown as a model. The false twist stretched yarn has a form in which a wave-shaped crimped portion (a) and a coil-shaped crimped portion (b) are mixed as a whole. On the other hand, in the conventional false twisted yarn, the coil-shaped crimped portion (b) and the billet-shaped crimped portion (c) are mixed. FIG. 1 (C) shows an example of a false twisted yarn from which crimps have been excessively erased. The number of coiled crimps (b) has been reduced to a small number, and most of them have been wavy crimps (a). ) And the bulkiness has been lost.

The general forms of the coated elastic yarn using the false twisted yarn shown in FIGS. 1A, 1B and 1C as the coated yarn are described in the above (A), (B) and (C). 2) is shown in FIG. As shown in FIG. 2 (A), the bulky coated elastic yarn of the present invention is generally in a state of uniform bulkiness, in which the coated yarn swells up from the core yarn and has little change in shape in the length direction. . On the other hand, when the conventional false twisted yarn shown in FIG. 1 (B) is used for the covering yarn, the covering state is entirely uneven, for example, the covering yarn is wound around the core yarn in close contact with the core yarn. (D), and a portion (e) where the slack covering yarn swells. When the false twisted yarn shown in FIG. 1 (C) is used, the covering yarn lacks a bulge as a whole, and the bulkiness is poor, and the single yarn is separated and floats, or a part of the yarn is excessive. There is a form in which the covering yarn swells and is uneven. 1 and 2 are partially exaggerated for easy understanding of each mode.

The relationship between the crimp shrinkage and the number of twists of the coated yarn and the bulkiness, tactile sensation and uniformity of the coated elastic yarn are closely related.
In the false twisted yarn having a crimp shrinkage of less than 30%, the coil-shaped crimp is reduced and the wave-shaped crimp is mostly formed, and the coated uniform yarn has the desired uniform bulkiness and tactile sensation as the coated yarn. Cannot be granted. That is, the state shown in FIG. Usually, it is preferably at least 31%, and although there are some differences depending on the fineness conditions of the false twisted yarn, when the total fineness often used practically is 200 denier or less, it is particularly preferably about 34 to 35%. is there. Conversely, when the crimp shrinkage ratio increases, the ratio of the coil increases, and eventually, the twist occurs and the ratio increases. This corresponds to the state shown in FIG.

[0014] The coated yarn which can be used for the bulky coated elastic yarn of the present invention is greatly related to the torque. When the torque is increased and the number of twists exceeds four, the area where the coil and the twist are mixed increases. However, it becomes impossible to impart sufficient bulkiness and the tactile sensation of hair growth to the coated elastic yarn. Although it depends on the fineness condition, it is usually preferably three times or less. The crimp shrinkage of the conventional nylon false twisted yarn is 15% to 40%, and the number of twists is 8 to 2 times.
The range was about 0 times. False twisted yarn composed of a single yarn having a large fineness generally has a large crimp shrinkage and skewing number, and false twisted yarn composed of a single yarn having a small fineness has a low crimp shrinkage ratio and a low number of skeins. There is a tendency. When the single-fiber fineness exceeds 3.5 denier, the soft touch is rapidly reduced. Usually, 3 denier or less is preferable. For the purpose of the present invention, a fineness of 2 denier or less, particularly about 1 denier is preferable, but it can be appropriately selected within a range not exceeding 3.5 denier in consideration of the dyeing effect, gloss, and price.

Next, the above-mentioned nylon (or polyester)
A general method for producing a false twist stretched yarn will be described. First, a nylon false-twisted stretched yarn in which a wave and a coil are mixed at a low torque used for the bulky coated elastic yarn of the present invention, as an example of a production method that can be preferably and easily implemented,
A method in which a nylon false twisted yarn having a single yarn fineness not exceeding 3.5 denier is subjected to an elongation treatment of 4% to 15%, preferably 5% to 14% within a temperature range not heating or not exceeding 205 ° C. can give. By subjecting the single yarn of the false-twisted nylon yarn to a high torque by performing the elongation treatment of 4 to 15%, the oblique molecular orientation and the orientation difference in the cross section of the single yarn, which caused the mixture of the coil and the twist. Is reduced and the torque is reduced, and the shape is changed to a shape in which little twisting is observed.
On the other hand, despite the latent crimps becoming apparent due to elongation and exceeding the crimp shrinkage of 30%, a nylon false twist elongation process in which a low-torque wave with a skewing number of 4 or less and a coil are mixed. Yarn is obtained. False twisted yarn with relatively large single yarn fineness reduces excessive crimpability along with torque, and false twisted yarn with small single yarn fineness produces the effect of reducing torque and manifesting the crimp. Both the shrinkage and the number of twists can be changed to desirable levels.

Although the elongation treatment can be performed in a non-heated state, it is preferable to perform the elongation treatment in a heated state, preferably at 150 to 200 ° C., from the viewpoint of the processing effect and the processing efficiency (processing speed, etc.). If the elongation treatment is carried out under heating conditions, it is possible to easily remove the excessive torque force and the mixed state of the twist, and to easily bring the desired state, or to promote the appearance of the crimp. Further, the stretch set of the false twisted yarn is performed, and the heat shrinkability of the treated yarn is reduced along with the decrease in the fineness due to the elongation, which contributes to the reduction of the basis weight. The higher the heating temperature, the more advantageous. However, if the temperature exceeds 205 ° C., the crimping and strength of nylon yarns tend to decrease, so it is better to avoid them. Generally, a low elongation rate range is preferably used under heating conditions, particularly under high temperature conditions. It is preferable to set a relatively high elongation rate under non-heating or low-temperature heating conditions.

According to the results obtained empirically, under the condition that the crimp shrinkage does not reach 4%, the reduction of coexisting shrinkage and the manifestation of crimp are insufficient, so that nylon temporary It is difficult to produce twisted and stretched yarn. Also, 15
%, The crimpability is excessively reduced and the wave-shaped crimp becomes the main component, and it is difficult to produce a bulky coated elastic yarn even when used as a coated yarn. The appearance of knitted fabrics that are processed using is prone to be poor.

For example, a nylon false-twisted yarn having a total fineness of 30 deniers, 10 filaments, a crimp shrinkage of 41% and a skewing number of 12.5 times is heated to 180 ° C. and heated at 5%. Subjected to elongation treatment, the crimp shrinkage rate is 35%,
A nylon false twist stretched yarn having a skewing number of 2 was able to be produced. In another example, a nylon false-twisted yarn having a total fineness of 20 deniers, a filament count of 20, a crimp shrinkage of 14%, and a skein number of 17 times was subjected to 180 ° C.
A 10% elongation treatment is performed under heating, and the crimp shrinkage ratio is 35%.
%, And a low-torque nylon false-twist stretched yarn having a skein number of 1.5 times could be produced. A bulky coated elastic yarn was produced using these false twisted and stretched yarns, and further processed knitted fabrics each had a soft hairy-like feel and a plump appearance.

In the case of the polyester false twisted yarn, a yarn having the same softness as that of the nylon yarn and a bulky polyester false twist stretched yarn having the same softness as that of the nylon yarn is produced by using the yarn and the processing conditions substantially the same as those of the nylon false twisted yarn. Can be.
In order to elongate the polyester false twisted yarn, a yarn having a single yarn fineness of 3.5 denier or less is generally heated or heated without heating.
Under heating conditions of 0 ° C. or less, 5% to 15%, preferably 6%
% To 13%, a polyester false twist stretched yarn having a crimp shrinkage of 30% or more and a skein number of 4 or less can be obtained. In the case of polyester false twist stretched yarn,
Preferably, the number of skeins is three or less. The elongation condition is that the heating temperature can be as high as 210 ° C., and elongation of 5% or more is required for preferable quality.

Next, a method of directly winding a stretched nylon false-twisted stretched yarn on a bobbin with a brim for covering using a ring twisting winder will be described with reference to FIG. FIG. 3 is an example of a system diagram of a ring twisting winder used in the present invention. The nylon false-twisted yarn 2 drawn from the nylon false-twisted yarn package 1 is
4, the yarn is taken up by a yarn feed roll 5, and sent to a heating extension zone 6. Next, elongation of 4 to 15% is applied by an elongation roll 7 and heated while being in contact with a heater 8 to be turned into a nylon false twisted and stretched processed yarn 9 and sent to a winding section 10. In the winding section, the air is directly wound on a bobbin 14 with a brim for covering by a traveler 13 sliding on a ring 12 via a balloon guide 11. The flanged bobbin 14 is fitted to the spindle 15 and rotates, and the traveler 13 on the ring 12 is rotated by the winding yarn. The ring twisted yarn winding method is a suitable method in terms of stability of winding tension, non-scuffing property, constant length of wound yarn, and the like. The elongation method using the ring twisting winder can be used in the elongation treatment of the polyester false twisted yarn according to the above.

In the present invention, it is desirable to adopt a ring twisted yarn winding method for the elongation treatment, and to wind the stretched nylon (or polyester) false-twisted elongation yarn directly onto a covering bobbin. This is not simply for streamlining the process, but it is wound up on a bobbin with a brim for covering following the elongation process. The coated yarn having the desired quality as it is can be used for coating the elastic yarn in the next step, preventing from intrusion. However, the winding method in the present invention is not limited to the ring twisted yarn winding method, and a normal horizontal winding or vertical winding method at a speed controlled to the yarn speed of the elongation process can also be used.

Further, using the coated yarn having the required characteristics,
The core yarn covered with the elastic yarn becomes the bulky coated elastic yarn of the present invention. The total draft ratio of the elastic yarn of the bulky coated elastic yarn of the present invention is usually 1.4 to 4 times, preferably 1.5 to 4 times.
The range is 3.7 times, and the soft drape property of the product fabric can be imparted to the soft touch of the nylon (or polyester) false twist stretched yarn and the soft touch of the hair growth. However, when a particularly soft touch is required, the total draft ratio of the core yarn may be set in the range of 1.4 times to 2.6 times. The total draft rate of the core yarn of the coated elastic yarn using the conventional nylon false twisted yarn is usually about 3 to 3.7 times. By reducing the total draft rate and reducing the shrinkage of the elastic yarn, the shrinkage of the knitted fabric itself is suppressed, the degree of freedom of the structure is improved, and the flexibility or drape of the fabric is improved. In applications where excessive tightening is not preferred, moderate tightening properties are maintained and the knitted fabric is added with flexibility. A method of producing the bulky coated elastic yarn of the present invention by covering the above-mentioned coated yarn on the elastic yarn will be described. FIG. 4 shows a system diagram of a single covering machine (for two weights) and FIG. 5 shows a system diagram of a double covering machine as an example of a coated elastic yarn producing apparatus suitable for producing a bulky covered elastic yarn. The component names indicated by the reference numerals in both figures are common.

The elastic yarn package 21 is put on a pair of drive rolls 22 and rotated, and the elastic yarn 23 is pulled out through the guide 24, taken up by the preceding draft roll 25, and supplied to the covering zone 36. The elastic yarn is stretched about 1.4 to 2 times by the preceding draft roll 25 to stabilize the extraction of the elastic yarn 23 from the package 21. The elastic yarns 23 fed to the covering zone 36 are hollow spindles 26 and 2 rotating at a high speed.
After passing through the hollow portion of 6 ', the wire is taken up by the final draft roll 28 via the winding portions 27 and 27'. The final draft roll 28 can be appropriately selected and set according to the purpose of use of the product.
The elastic yarn is coated at a speed of adding a total draft of about 4 to 4 times, and the elastic yarn is covered in a state of being expanded about 1.4 to 4 times. In the case of a product that emphasizes a particularly soft touch, the total draft ratio of the elastic yarn is 1.4 times or more.
It may be set to about 2.6 times.

The bobbins 30 and 30 'with a covering collar wound with the covering yarn 29 required for the present invention are fitted to the hollow spindles 26 and 26' rotating at a high speed, rotated at a high speed, and pulled out. The covering threads 29, 29 'are wound around the lower winding portions 27, 27' of the centering guides 31, 31 '.
To cover the elastic yarn 23.
The coated elastic yarn 32 formed in this manner is taken up by the final draft roll 28, is wound up by a winding package 35 via a winding guide 33 and a traverse guide 34, and the production of the bulky coated elastic yarn is completed. Depending on the purpose, it is also possible to adopt another method as the coating method, for example, a turbulent gas jet entanglement method or an alternate twist entanglement method.

Further, the bulky coated elastic yarn of the present invention is a core coated yarn having a property such as hygroscopicity as a lower coated yarn.
The false twist stretched yarn can be double-coated as a top-coat yarn. In addition to other useful properties, it can be a soft tactile and balanced bulky coated elastic yarn.
Further, the elastic yarn may be covered with a false twisted stretched yarn or a ply twisted composite yarn with a yarn having other useful properties. The bulky coated elastic yarn of the present invention can be manufactured. In this case, although it depends on the type of composite yarn,
In order to maintain a soft touch and uniformity, the crimpable nylon false twisted yarn is usually 33% by weight or more, preferably 40% by weight or more.
Use more than weight%. Natural fibers such as wool (spun yarn), silk, cotton (spun yarn), regenerated fibrous fiber such as rayon, semi-synthetic fiber, various synthetic fibers, and modified yarns Functionally, synthetic fibers and the like include yarns and fibers such as antistatic fibers, far-infrared radiation fibers, and deodorant and antibacterial fibers.

The apparel product using the knitted fabric knitted with the bulky coated elastic yarn of the present invention at the portion where it touches the skin has an extremely soft touch and uniform appearance regardless of circular knitting, flat knitting or vertical knitting. It is suitable for stockings, underwear, various foundation products and the like. The bulky coated elastic yarn using the polyester false twist stretched yarn as the coated yarn is suitable for use in white pantyhose, socks or tights for medical staff.

[0027]

EXAMPLES Further, a bulky coated elastic yarn of the present invention was manufactured and fiber products such as pantyhose were trial-produced, and compared and evaluated with a coated elastic yarn using a conventional crimped yarn as a coated yarn. The results will be described. In the examples and comparative examples, prior to the cutting and sewing of the panty portion, the vertical dimension of the knitted fabric of the panty portion was measured, and further, the workability of cutting and sewing (idle feed rate) and the rate of occurrence of sewing defects were determined per condition. 200
Paws were evaluated and averaged. For the vertical placement, randomly select 10 unsewn knitted fabrics after steam peeling (treatment at 90 ° C, 100% steam for 30 minutes), spread the wrinkles and place them on a flat plate. The vertical length up to the lower end (switching portion to the gutter) was measured to obtain an average value.

The panty workability in the table will be described.
The cutting and sewing of the panty portion at the processing site is generally performed by an automatic device, but the knitted fabric is inserted into the automatic device manually. The knitted fabric is inserted into the specified front and rear positions (the position of the upper part of the panty and the position of the garter), so prepare a knitted fabric with a slightly shorter length so that wrinkles do not occur. Set the position. If the knitted fabric is long, the position is set in a loose state, and a rework to prevent wrinkles and equalize it is necessary. During the rework, the device moves empty, causing a drop in productivity. Sometimes wrinkles are sewn into a part of the sewn portion, and a re-sewing process is required. Therefore, the shorter the vertical dimension, the better. In Examples and Comparative Examples, pantyhose was processed at a processing site according to a normal production operation, and the results were summarized.

Further, the panty part of the processed pantyhose was cut off, the longitudinal elongation dimension, the lateral elongation dimension, and the average elongation were measured, and the weight and the basis weight were obtained. The rate of change was determined. The average elongation ratio (S) and the basis weight increase / decrease rate (M) were calculated by the following equations (2) and (3).

[0030]

(Equation 1) The vertical stretch of the knitted fabric is as follows. The male grasps the seam (A) of the waist rubber panty on the side part of the panty and the switching part (B) from panty to gata with the left and right hands, stretches as much as possible, The elongation length was measured. The lateral elongation was measured by grasping the front and rear stitches with both hands at a position 5 cm below the waist rubber switching part, extending the force as much as possible, and measuring the lateral elongation length. Each of the above measurements was performed on 10 pairs of pantyhose randomly selected, and the average value was obtained. The execution conditions, measurement results, and evaluation results of Examples 1 to 8 and Comparative Examples 1 to 8 are collectively shown in Tables 1 to 6.

Examples 1 to 4 Nylon 6 false twisted yarn having a total fineness of 30 denier (actual total fineness: 29 denier) and 10 filaments (number of false twists: 4,800 t / m, processing temperature: 170 ° C., t) The number of turns is shown in FIG. 3. Using a ring twisting winder of the same type as shown in FIG. Wound directly on bobbin with collar. The crimp shrinkage and skewing number of the wound coated yarn were measured, and the results are shown in Table 1 together with the elongation conditions. Further, each of the wound coated yarns was coated with a 30 denier elastic yarn at a total draft ratio of 3.3 times by a coating elastic yarn manufacturing apparatus of the same type as shown in FIG. 4, and the number of twists of the coated yarn was 600 t / t. m, 30
A 30 denier bulky coated elastic yarn was produced. In addition,
30.3 using conventional nylon false twisted yarn for covering yarn
In order to produce a 0 denier coated elastic yarn, it was customary to perform a coating winding of 800 t / m. However, since the coated yarns used in this example were all excellent in uniformity and covering property, , 600 t / m wound coating was sufficient. The bulky coated elastic yarn was relaxed to observe the coated state, and the results are shown in Table 2 together with the production conditions.

Furthermore, the knitted fabric for panty stocking is knitted by using the manufactured bulky elastic yarn in the panty portion and using a 4-port sock knitting machine with a diameter of 3.3 / 4 inch and a number of needles of 360. Then, steam steaming, cutting, sewing, dyeing, finishing and the like were performed according to a standard method, and processed into pantyhose. The stitch length of the panty portion was set and knitted such that the extension size of the panty portion was the same as the extension size of the panty portion of the panty stocking processed in Comparative Example 1 described later. The steam steaming of the knitted fabric is performed at 90 ° C. and 30% in 100% steam.
For a minute, the knitted fabric was shrunk, and the cutting and sewing properties were improved. The bulkiness, tactile sensation and uniformity of the panty part were evaluated, and the longitudinal elongation dimension and the lateral elongation dimension of the panty part were measured.
Table 3 shows the results of these evaluations and measurements. In the knitted fabric using the bulky coated elastic yarn of the present invention, the laying length of the panty portion after steam steaming at 90 ° C. by a standard method is reduced by about 2 cm (9%) as compared with the conventional one (comparative example). In addition, the efficiency of cutting and sewing has been improved, and the incidence of defective products has been reduced.

Comparative Examples 1 to 4 The same nylon 6 false-twisted yarns as used in Examples 1 to 4 were used as coated yarns without elongation treatment to produce coated elastic yarns, non-heated and heated at 180 ° C. The following shows an example in which a 2% elongation treatment was performed under each condition to use as a coated yarn, and an example in which 17% elongation was applied without heating and used as a coated yarn. In each case, a ring twisted yarn was wound up as in Example 1 to form a coating yarn, and a coated elastic yarn (the number of coating windings was 800 t / m) was manufactured in the same manner as in Example 1.
While processing into pantyhose according to the example, the same measurement and evaluation as in the example were performed. The production, processing conditions, evaluation results, and the like of the comparative examples are shown in Tables 1 to 3.

Examples 5 to 8 Nylon 66 false twisted yarn having a total fineness of 20 denier (actual total fineness: 19 denier) and 20 filaments (number of false twists: 5, 600: t / m, processing temperature: 185 ° C.) And nylon 66 false twisted yarn having a total fineness of 70 denier (actual total fineness: 68 denier) and 52 filaments (number of false twists:
3,300 t / m, processing temperature: 185 ° C.) using a ring twisting winder of the same type as shown in FIG.
6%, 10%, 14% under heating conditions of 80 ° C. and 200 ° C.
%, And wound up directly onto a flanged bobbin as a covering yarn. The crimping shrinkage and the number of twists of the wrapped yarn were measured. Table 4 shows the elongation conditions and measurement results. Further, this coated yarn was prepared in the same manner as in Example 1 for 20 days.
The denier-coated yarn is wound around a 15-denier elastic yarn and the number of twists is 8
At 00 t / m, the 70 denier coated yarn was wound around a 20 denier elastic yarn at a winding twist of 400 t / m to produce a bulky coated elastic yarn. Since the same measurement as in Example 1 was performed, the results are shown in Table 5 together with the production conditions.

Further, from the panty portion to the toe tip using the manufactured bulky elastic yarn, a 20-denier yarn is a 4-port feeding sock knitting machine having a diameter of 3.3 / 4 inches and 384 needles.
For 70 denier yarn, the number of stitches is 3.3 / 4 inch stitches 320
Each knitted fabric for tights was knitted with a four-necked sock knitting machine and steamed, cut and sewn, dyed, finished, and set to be processed into tights. Measurement and evaluation were performed on the processed product in the same manner as in Example 1. However, regarding the basis weight measurement of the final product, the measurement was performed on the panty-leg-toe as a whole. Table 6 shows these processing conditions and evaluation results.

Comparative Examples 5 to 8 Coated yarns were wound up under the conditions shown in Table 4 using the same nylon 66 false twisting yarns and ring twisting winders as used in Examples 5 to 8. Then, a coated elastic yarn was produced in the same manner as in Example 5, except that the conditions shown in Table 5 were used. Further, tights products were manufactured under the same conditions. Measurement in each process,
Evaluation was performed in the same manner. The production, processing conditions and results of these measurements are summarized in Tables 4 to 6.

Example 9 The same nylon 66 false twisting yarn as used in Example 5 was used, except that a 6% elongation treatment was carried out under the heating conditions of 190 ° C. to obtain a coated yarn. Wound directly on the bobbin with a brim. Further, the coated yarn was wound around a 13-denier elastic yarn in the same manner as in Example 5 under the conditions of a total draft ratio of 1.8 times and a winding twist of 700 t / m.
13.20 denier bulky coated elastic yarn was produced. The knitted circular knitted fabric is produced by knitting the manufactured bulky coated elastic yarn with an 8-inch yarn feeding circular knitting machine having a diameter of 8 inches and 960 needles, and performing appropriate cutting, sewing, dyeing, and finishing to produce women's shorts. processed. This shorts product had an adequate degree of adhesion to the human body without excessive tightening or slackening, and had an excellent touch without a rough or tingling sensation that would be expected of a product using ordinary false twisted yarn. . Because it is a bulky product, it has features such as being rich in heat insulation despite being thin.

Example 10 Polyester false twisted yarn having a total fineness of 35 denier (actual total fineness: 34 denier) and a filament number of 20 (false twist: 3,200 t / m, processing temperature: 190 ° C.) In the same manner as in Example 1, except that an elongation treatment of 8% was performed at a heating temperature of 190 ° C., and the coated yarn was directly wound on a flanged bobbin. The crimp shrinkage of this coated yarn was 34.5%, and the number of twists was 1.5. Further, in the same manner as in Example 1, this coated yarn was converted into an elastic yarn of 20 denier (total draft magnification: 3.
1x) to produce a bulky polyester-coated elastic yarn. When examining the coated state of this coated elastic yarn,
It was close to the form illustrated in FIG. This bulky coated elastic yarn is used for the leg and panty parts,
The pantyhose knitted fabric was knitted by a 4-inch, 4-port sock knitting machine with 360 stitches, steamed, cut and sewn, dyed, and finished to be processed into a stocking for nurses. In addition, white dyeing was performed under normal pressure conditions. The obtained pantyhose had a good touch without a hard feeling peculiar to polyester. Further, no fading (yellowing) was observed even after long-term wearing.

Example 11 Polyester false twisted yarn having a total fineness of 150 denier (actual total fineness: 148 denier) and a filament count of 48 (number of false twists: 2,800 t / m, processing temperature: 190 ° C.)
Was subjected to 8% elongation at a heating temperature of 190 ° C. in the same manner as in Example 1, and was directly wound up on a bobbin with a brim as a covering yarn. The crimp shrinkage of this coated yarn was 33.8%, and the number of twists was one. This coated yarn was used in the same manner as in Example 1 for 12 hours.
0 denier elastic yarn (total draft magnification: 4 times), 150
A t / m wrap coating was performed to produce a bulky coated elastic yarn. Observation of the coated state of the bulky coated elastic yarn revealed that it was bulky and excellent in uniformity. This bulky coated elastic yarn was used for the portion below the leg, and was processed into a hard support high socks for health using a 4-port sock knitting machine with a diameter of 3.3 / 4 inch and a number of needles of 280. The knitting was performed while adjusting the yarn feeding state and the degree of knitting so that the tightening pressure at the ankle and calf became an appropriate value. According to a standard method, steam steaming, cutting, sewing, dyeing, and finishing were performed. The white dyeing was carried out under the same normal pressure conditions as in Example 10. The obtained health support high socks for health had a strong tightening pressure, had a soft touch that did not feel the hardness unique to polyester, and had a uniform appearance.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

[Table 3]

[0043]

[Table 4]

[0044]

[Table 5]

[0045]

[Table 6]

[0046]

The bulky coated elastic yarn of the present invention improves the instability of the product shape while maintaining the extremely soft touch of the stretched yarn of the false twisted yarn by the strong elastic properties of the elastic yarn. In addition, it has an extremely soft touch and a uniform appearance, so that it can be widely used for textile products such as stockings and underwear. Furthermore, due to the improvement of the cutting and sewing work efficiency and the reduction of the defective product occurrence rate, there were unexpected effects on the improvement of the productivity and the cost reduction.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged view schematically showing an example of a crimped form of a single yarn. Processed yarn

FIG. 2 is an enlarged view showing an example of a coated state of a coated elastic yarn (A): a bulky coated elastic yarn of the present invention (B): a coated elastic yarn using a conventional false twisted yarn (C): a crimp Coated elastic yarn using excessively erased processed yarn

FIG. 3 is an example of a system diagram of a ring twisting winder used in the present invention.

Fig. 4 Coated elastic yarn manufacturing equipment (single covering machine)
Example of system diagram

Fig. 5 System diagram example of the same as above (double covering machine)

[Explanation of symbols]

1: False twisted yarn package 2: False twisted yarn
3, 4: Guide 5: Yarn supply roll 6: Heat stretching zone 7: Stretch roll 8: Heater 9: False twist stretched yarn 10: Winding section 11: Balloon guide 12: Ring 13: Traveler 14: Collar for covering With bobbin 15: Spindle 21: Package of elastic yarn 22: Drive roll
23: elastic yarn, 24: guide, 25: preceding draft roll 26, 26 ': hollow spindle 27, 27': coated yarn winding part 28: final draft roll 29, 29 ': coating yarn 30, 30': brim Bobbins 31, 31 ': Centering guide 32: Coated elastic yarn 33: Winding guide 34:
Traverse guide 35: Rewind package 36: Covering zone

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[Procedure amendment]

[Submission date] September 3, 1998 (1998.9.3)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (9)

[Claims] 1. Nylon having a single fiber fineness not exceeding 3.5 deniers, a crimp shrinkage ratio of at least 30% and a skewing number not exceeding 4 as shown below, and having a mixed wave and coil. A bulky coated elastic yarn, wherein a false twist stretched yarn is used as a covering yarn and is covered with an elastic yarn of a core yarn. Crimp shrinkage (%) = {(LM) / L} × 100 (1) where, L: sample yarn having a circumference of 112.5 cm, 10 turns (5 when the total fineness exceeds 70 deniers) Wrap the skein and hang it on the hook.
Length of skein after 15 seconds after applying a load of denier, M: Immediately after measuring the above L, change the load to 1 mg / denier, length of skein after 15 seconds, skein number : The number of twists generated by measuring the above M and immediately changing to no load 2. A polyester stretch false twist in which a wave and a coil having a single yarn fineness not exceeding 3.5 denier, a crimp shrinkage of at least 30% and a skewing number not exceeding 4 are mixed. A bulky coated elastic yarn, wherein a processed yarn is used as a coated yarn and is covered with an elastic yarn of a core yarn. 3. The bulky coated elastic yarn according to claim 1, wherein the total draft ratio of the elastic yarn of the core yarn is 1.4 times to 2.6 times. 4. A multi-layered coating of an elastic core yarn using the nylon false-twisted stretched yarn of claim 1 or the polyester stretched false-twisted yarn of claim 2. Characterized by bulky coated elastic yarn. 5. A yarn obtained by plying or plying another fiber with the nylon false-twisted stretched yarn according to claim 1 or the polyester stretched false-twisted yarn according to claim 2, and covering the elastic yarn of the core yarn. Characterized by bulky coated elastic yarn. 6. A textile product wherein the bulky coated elastic yarn according to any one of claims 1 to 5 is used in a portion which comes into contact with the skin. 7. Nylon false twisted yarn having a single yarn fineness of not more than 3.5 denier,
% To 15%, to obtain a nylon false-twisted stretched yarn having a crimp shrinkage of at least 30%, a skewing number of not more than 4 and a mixed wave and coil state. A method for producing a bulky coated elastic yarn, comprising coating the stretched processed yarn as a covering yarn on an elastic yarn of a core yarn. 8. A polyester false twisted yarn having a single yarn fineness not exceeding 3.5 denier is subjected to an elongation treatment of 5% to 15% at a temperature of not heated or 210 ° C., and the crimp shrinkage ratio is at least. A polyester stretch false twisted yarn in which the wave and the coil are mixed is obtained by 30%, the number of twists of which does not exceed 4 times, and the obtained stretched yarn is coated on the elastic yarn of the core yarn as a coating yarn. A method for producing a bulky coated elastic yarn. 9. The method for producing a bulky coated elastic yarn according to claim 7 or 8, wherein the nylon false twisted yarn or the polyester false twisted yarn is subjected to elongation using a ring twisting winder, and the stretched yarn is treated. The method for producing a bulky coated elastic yarn according to claim 7 or 8, wherein the stretched nylon false-twisted yarn or polyester false-twisted stretched yarn is directly wound up on a bobbin with a brim for covering to form a coated yarn.