JP2008115508A - Swimwear fabric, method for producing the same, and swimwear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a swimwear fabric having a small resistance against water, and suitable for competitive swimwear in particular, to provide a method for producing the fabric, and to provide swimwear sewn from the fabric. <P>SOLUTION: The swimwear fabric consists of a knit structure formed of elastic yarns and non-elastic yarns, wherein the surface of the fabric is processed to be flat and smooth, the elastic yarns are exposed to the back surface of the fabric, and the ratio of the frictional coefficient of the back surface of the fabric to the frictional coefficient of the front surface of the fabric (the frictional coefficient of the back surface of the fabric/the frictional coefficient of the front surface of the fabric) is 1.3-3.0. Preferably, the method for producing the fabric preferably includes knitting the elastic yarns into a two-needle structure using a warp knitting machine, or includes knitting the elastic yarns using a double raschel knitting machine. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a swimsuit fabric, and more specifically, a swimsuit fabric comprising a knitted structure of elastic yarn and inelastic yarn and having a low resistance to water, and particularly suitable as a swimsuit for swimming, and a swimsuit comprising the fabric. About.

  A fabric made of a knitted structure of elastic and non-elastic yarns has almost the same degree of stretch and stretching in the warp direction, weft direction, and diagonal direction, and possesses a fabric tightening force that has no difference depending on the direction. And used as a fabric for sportswear such as swimming wear (see, for example, Patent Documents 1 and 2)

A warp for knitting a base tissue part knitted from synthetic fiber yarns (non-elastic yarns) such as polyester fiber yarns and warp yarns for knitting surface tissue parts made of elastic yarns such as polyurethane yarns and rubber strings alone. In a non-slip tissue cloth formed by knitting the surface tissue part on the front side or the back side of the base structure part, or in a knitted structure including rubber yarn or polyurethane yarn, a part of the rubber yarn or polyurethane yarn is on the surface of the knitted structure A knitted fabric structure that has been provided with anti-slip properties so as to be exposed has also been proposed, and is applied, for example, as an anti-slip grip for sports equipment, sports socks, and the like (see Patent Documents 3 to 5).

  In addition, the base fabric is knitted with non-elastic synthetic fiber multifilament yarns such as polyester yarn, and is sewn from a fabric made by knitting and knitting multi-filament yarns of polyurethane elastic yarn. A swimsuit with good drainage has also been proposed (see Patent Document 6).

As mentioned above, the fabric made of a knitted structure of elastic yarn and inelastic yarn has the same degree of stretch, stretching force, and fabric tightening force, has an excellent fit, and has good drainage and slip resistance. Therefore, it has characteristics suitable as a fabric for swimming wear, but it has not been studied to reduce water resistance, particularly when applied to swimming wear.
Japanese Patent Laid-Open No. 2003-73962 JP-A-7-70894 JP 2004-124273 A JP 2004-176214 A Japanese Patent Laid-Open No. 2005-29934 JP 2000-345409 A

  The inventors have paid attention to the fabric composed of the knitted structure of the elastic yarn and the non-elastic yarn, which has many characteristics suitable as a swimming wear fabric, in order to obtain a swimsuit particularly suitable for swimming, and the surface of the fabric. As a result of repeated tests and examinations on the relationship between characteristics and resistance to water, it was found that the resistance to water is greatly influenced by the friction coefficient of the front and back of the swimsuit.

The present invention was made as a result of further studies based on the above findings, and the object thereof is a swimwear fabric that has low resistance to water and is particularly suitable for swimming wear, and a method for producing the same, and The object is to provide a swimsuit made of fabric.

  The swimsuit fabric according to claim 1 for achieving the above object comprises a knitted structure of elastic yarn and inelastic yarn, the surface of the fabric is smoothed, and the elastic yarn is exposed on the back surface of the fabric. The ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the surface of the fabric (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric) is 1.3 or more and 3.0 or less.

  The swimsuit fabric according to claim 2 is characterized in that, in claim 1, the ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the surface of the fabric is 1.5 or more and 2.3 or less.

  The swimsuit fabric according to claim 3 is characterized in that, in claim 1 or 2, the longitudinal and lateral stretch stresses of the fabric are 1.5 N or more and 6.5 N or less. However, the measurement of the tensile stress is a value measured according to JIS L1018 8.14.1 grab method.

  The swimsuit fabric according to claim 4 is characterized in that, in any one of claims 1 to 3, the exposed area of the elastic yarn exposed on the back surface of the fabric is 30% or more and 70% or less of the area of the back surface of the fabric. To do.

  The swimsuit fabric according to claim 5 is characterized in that, in any of claims 1 to 3, the exposed area of the elastic yarn exposed on the back surface of the fabric is 90% or more and 100% or less of the area of the back surface of the fabric. And

The method for producing a swimsuit fabric according to claim 6 is a method for producing the swimsuit fabric according to any one of claims 1 to 4, wherein a warp knitting machine is used and the elastic yarn is made into a double-knitted structure. It is characterized by.

A method for producing a swimsuit fabric according to claim 7 is a method for producing a swimsuit fabric according to claim 5, wherein a double raschel knitting machine is used, and an inelastic yarn and an elastic yarn are respectively provided on a front surface and a back surface of the fabric. The knitting is performed so as to be exposed at an exposed area ratio of 90% to 100%.

The swimsuit according to claim 8 is characterized in that the swimsuit fabric according to any one of claims 1 to 5 is used for at least a part of the swimsuit, and the back side of the fabric is fixed so as to be on the skin side of the swimsuit wearer. And swimsuit.

A swimsuit according to claim 9 uses the swimsuit fabric according to any one of claims 1 to 5 in at least one of the chest, waist, lower buttocks and ankles of the swimsuit wearer, and the back of the fabric is worn by the swimsuit It is fixed to be on the skin side of the person.

According to the present invention, the resistance to water is effectively reduced by the interaction of the ratio of the friction coefficient between the front surface and the back surface, the smoothed surface shape, and the anti-slip effect on the skin surface of the swimsuit wearer. A swimsuit fabric suitable as a fabric for use, a method for producing the same, and a swimsuit comprising the swimsuit fabric are provided.
Normally, if the elongation ratio is reduced, the friction coefficient is reduced accordingly, but in the fabric or swimsuit of the present invention, the magnitude of the extension force is hardly affected by the magnitude of the friction coefficient. I want to mention that.

  The swimsuit fabric of the present invention comprises a knitted structure of elastic yarn and inelastic yarn. Polyurethane yarn, rubber yarn, etc. are applied as elastic yarn (especially polyurethane or spandex, trade name is lycra), and non-elastic yarn is polyester yarn, nylon yarn, polyacrylic yarn, polypropylene yarn, rayon. Multifilaments of synthetic fibers such as yarns are applied.

In the swimsuit fabric of the present invention, the ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the fabric surface (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric) is 1.3 or more and 3.0 or less. It is preferable that the ratio (coefficient of friction on the back side of the fabric / coefficient of friction on the surface of the fabric) is within the above range, so that the appropriate adhesion, fit, and slip between the skin surface of the swimsuit wearer and the fabric The stopping effect is achieved, the resistance to water is reduced, and the driving force during swimming can be improved.
The friction coefficient is measured by the following method, using a surface testing machine KES-FB4 manufactured by Kato Tech Co., Ltd., the fabric whose friction coefficient is to be measured is set on the testing machine with the measurement surface facing up, The terminal movement resistance F is measured at a pressing pressure W of 50 gf, and the friction coefficient (μ = F / W) is calculated. The measurement is repeated three times, and the average value is taken as the friction coefficient.

If the ratio is less than 1.3, the coefficient of friction of the fabric in contact with the skin surface of the swimsuit wearer is small, the adhesion between the skin surface and the fabric, the fit, and the anti-slip effect are insufficient. In some cases, water easily enters between the swimsuit and the skin surface, and the swimsuit may turn up, the propulsion resistance during swimming increases, and the water drainage also decreases. When the ratio exceeds 3.0, the adhesion between the skin surface and the fabric, the fit, and the anti-slip effect are excessive, and there is a risk that the movement during swimming may be hindered. A more preferable range of the ratio is 1.5 or more and 2.3 or less. Furthermore, the friction coefficient of the back surface of the fabric is preferably 0.35 or more. More preferably, it is 0.40 or more.

It is important that the surface of the fabric is smoothed. The smoothness of the surface of the fabric affects the ratio (friction coefficient of the back surface of the fabric / friction coefficient of the surface of the fabric) and functions to increase this ratio. Smoothing is usually done by passing the dough between the rolls with the upper roll being a hot roll and the lower roll being a resin roll. It is performed by calendering or silage processing.
In addition, since the elastic yarn on the back side of the fabric is not affected by heat by the smoothing process, the elastic characteristics are not deteriorated and the friction performance is not deteriorated.

In the swimsuit fabric of the present invention, it is necessary that the elastic yarn is exposed on the back surface of the fabric, and the exposure of the elastic yarn produces an anti-slip effect between the skin surface of the swimsuit wearer and the fabric. It contributes to the improvement of the propulsive force at the time of swimming by reducing the resistance to. If the exposed area of the elastic yarn exposed on the back side of the fabric is less than 30%, the anti-slip effect tends to be insufficient, and if it exceeds 70%, the coefficient of friction on the back side of the fabric becomes high. Adhesion, fit, and anti-slip effect are likely to be excessive, giving a moderate anti-slip effect between the skin surface and the fabric, reducing resistance to water and stably improving the propulsive force during swimming For this purpose, it is desirable that the exposed area of the elastic yarn exposed on the back surface of the fabric be in the range of 30% to 70%.

The exposed area of the elastic yarn exposed on the back side of the fabric also affects the ratio (friction coefficient of the back side of the fabric / friction coefficient of the surface of the fabric). The larger the exposed area, the higher the coefficient of friction on the back side of the fabric. The ratio may be increased by setting the exposed area to 90% or more and 100% or less depending on the use mode of the swimsuit, but in this case, the anti-slip effect is excessive when the swimsuit is used and the movement of the swimsuit wearer is hindered. It is necessary to adjust the exposed area in relation to the coefficient of friction of the surface of the fabric so as not to occur.

  Desirably, the tensile stress in the machine direction and transverse direction of the fabric is 1.5N or more and 6.5N or less (the measurement of the tensile stress is a value measured according to the JIS L1018 8.14.1 grab method). With excellent stretching stress, excellent fit can be obtained, which can contribute to improvement of propulsive force during swimming. If it is less than 1.5N, the fit between the skin surface and the fabric becomes insufficient, and water easily enters between the swimsuit and the skin surface during swimming or diving, and the propulsion resistance during swimming increases. If it exceeds 6.5 N, the fit between the skin surface and the fabric becomes excessive, and there is a possibility that the movement during swimming may be hindered.

A method for producing a fabric having the above characteristics will be described. When producing a fabric in which the exposed area of the elastic yarn exposed on the back surface of the fabric is 30% to 70% of the area of the back surface of the fabric, warp knitting It is desirable to use a machine to knit the elastic yarn into a double-knitted structure.

  Examples of cross sections (enlarged photographs) in the wale direction and the course direction of the fabric manufactured by the above manufacturing method are shown in FIGS. 1 and 2, the upper side is the surface side of the fabric, and the lower side is the back side of the fabric. In particular, as seen in the cross section in the course direction (FIG. 2), the back surface side where the elastic yarn is exposed at an area ratio of 30 to 70%, whereas continuous ridges are formed on the surface side. It is recognized that a continuous groove is formed in.

Sections (enlarged photographs) obtained by smoothing the dough shown in FIGS. 1-2 are shown in FIGS. In particular, as shown in FIG. 4, the surface side on which continuous ridges are formed is smoothed by reducing the thickness by a heat roll, whereas the back surface on which continuous ridges are formed. On the side, the effect of smoothing is small, and there is almost no decrease in thickness. This means that the friction coefficient on the front surface side is reduced by the smoothing process, but the friction coefficient on the back surface side hardly changes, and the ratio by the smoothing process (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric). ) To make adjustment easier.

When producing a fabric in which the exposed area of the elastic yarn exposed on the back side of the fabric is 90% to 100% of the area of the back side of the fabric, it is desirable to use a double raschel knitting machine. The knitting structure is not particularly limited. When knitting with a double raschel knitting machine, the front side and the back side of the fabric are knitted separately, and in order to make this a single fabric, the front side and the back side can be knotted. Necessary. If a thread other than an elastic thread (that is, an inelastic thread) is used for the knot portion, the exposed area of the elastic thread exposed on the back surface knitted with the elastic thread cannot be 100% of the area of the back surface of the fabric. Only 90% to 98%. In the knot portion, when the front side (inelastic yarn) and the back side (elastic yarn) are knitted to form a loop shape, 100% of the inelastic yarn and elastic yarn are exposed on the front side and back side, respectively. Can do.

Regardless of which knitting machine is used to knit the fabric, adjust the thickness of the elastic yarn, the mixing ratio of the non-elastic yarn and the elastic yarn, the exposed area ratio of the elastic yarn on the back of the fabric, the smoothness, etc. Thus, it is important that the ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the surface of the fabric (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric) is within the scope of the present invention.

When a swimsuit is completed using the above-mentioned swimsuit fabric, the fabric is used, for example, in at least one place on the chest, waist, buttocks, and ankles of the swimsuit wearer, and the back of the fabric is the skin of the swimsuit wearer. Adhere to the side (for example, sewing, bonding, sticking, welding, etc.).

Hereinafter, examples of the present invention will be described and the effects thereof will be demonstrated. In addition, these Examples show one embodiment of this invention, and this invention is not limited to these.

Example 1
Using polyurethane yarn as elastic yarn, polyester yarn as non-elastic yarn, using warp knitting machine, thickness of elastic yarn, mixing ratio of non-elastic yarn and elastic yarn, exposed area ratio of elastic yarn on back of fabric, The smoothness was adjusted and the elastic yarn was knitted to form a two-dimensional knitted structure to produce a fabric. The exposed area of the polyurethane yarn exposed on the back side of the fabric was 53% of the area of the back side of the fabric.
The method for measuring the exposed area is as follows.
The fabric was appropriately magnified and photographed with a microscope, and the exposed area of the elastic yarn was measured with a digital planimeter made by Uchida for the obtained photograph (size: 10 cm × 10 cm = 100 cm ² ), and the elasticity with respect to the entire area (100 cm ² ). The exposed area of the yarn is shown as a percentage.

The coefficient of friction of the manufactured fabric was measured according to the above-described measurement method. As a result, 0.290 in the vertical direction of the fabric, 0.281 in the horizontal direction on the surface side of the fabric, and the vertical length of the fabric on the back side of the fabric. The ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the fabric surface (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric) is 0.571 in the direction and 0.563 in the horizontal direction. The direction was 1.97 and the horizontal direction was 2.00.
Moreover, when the tensile stress in the vertical direction and the horizontal direction of this fabric was measured in accordance with the JIS L1018 8.14.1 grab method, it was 4.8 N and 2.8 N, respectively.

Using the above fabric, the fabric was used on the chest, waist, buttocks and ankles of the swimsuit wearer, and the back of the fabric was sewn on the skin wearer's skin side to produce a swimsuit for swimming. This swimsuit was worn by a swimmer, and a number of competitions were performed to measure the record, and as a result, record improvement was confirmed.

Example 2
Using polyurethane yarn as elastic yarn, polyester yarn as non-elastic yarn, using double raschel knitting machine, elastic yarn thickness, mixing ratio of non-elastic yarn and elastic yarn, exposed area ratio of elastic yarn on back of fabric The smoothness was adjusted and the elastic yarn was knitted to form a two-dimensional knitted structure to produce a fabric. The exposed area of the polyurethane yarn exposed on the back surface of the fabric was 96% of the area of the back surface of the fabric.

The friction coefficient of the manufactured fabric was measured according to the above-described measurement method. As a result, the fabric side was 0.305 in the vertical direction of the fabric, 0.298 in the horizontal direction, and the fabric vertical length on the back side of the fabric. The ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the fabric surface (the friction coefficient of the back surface of the fabric / the friction coefficient of the surface of the fabric) is 0.760 in the direction and 0.738 in the horizontal direction. The direction was 2.49 and the horizontal direction was 2.48.
Moreover, when the tensile stress in the vertical direction and the horizontal direction of this fabric was measured according to the JIS L1018 8.14.1 grab method, it was 3.6 N and 5.3 N, respectively.

Using the above fabric, the fabric was used on the chest, waist, buttocks and ankles of the swimsuit wearer, and the back of the fabric was sewn on the skin wearer's skin side to produce a swimsuit for swimming. This swimsuit was worn by a swimmer, and a number of competitions were performed to measure the record, and as a result, record improvement was confirmed.

It is an enlarged view showing a cross-sectional example in the wale direction of a fabric according to the present invention knitted using a warp knitting machine so that an elastic yarn has a double stitch structure. It is an enlarged view which similarly shows the example of a cross section of a course direction. It is a cross-sectional enlarged view of the wale direction after smoothing the dough of FIGS. It is the cross-sectional enlarged view of a course direction similarly.

Claims (9)

It consists of a knitted structure of elastic yarn and inelastic yarn,
The surface of the fabric is smoothed,
Elastic thread is exposed on the back of the fabric,
A ratio of a friction coefficient of the back surface of the fabric to a friction coefficient of the fabric surface (friction coefficient of the back surface of the fabric / friction coefficient of the surface of the fabric) is 1.3 or more and 3.0 or less. The ratio of the friction coefficient of the back surface of the fabric to the friction coefficient of the surface of the fabric is 1.5 or more and 2.3 or less,
The swimsuit fabric according to claim 1. 3. The swimsuit fabric according to claim 1, wherein an extensional stress in a longitudinal direction and a lateral direction of the fabric is 1.5 N or more and 6.5 N or less.
However, the measurement of the tensile stress is a value measured according to JIS L1018 8.14.1 grab method. The exposed area of the elastic yarn exposed on the back surface of the fabric is 30% or more and 70% or less of the area of the back surface of the fabric,
The swimsuit fabric according to any one of claims 1 to 3. The exposed area of the elastic yarn exposed on the back surface of the fabric is 90% or more and 100% or less of the area of the back surface of the fabric,
The swimsuit fabric according to any one of claims 1 to 3. Using a warp knitting machine, knitting the elastic yarn into a double stitch knitting structure,
The method for producing a swimsuit fabric according to any one of claims 1 to 4. Using a double raschel knitting machine, knitting so that the inelastic yarn and the elastic yarn are exposed at an exposed area ratio of 90% or more and 100% or less on the front and back surfaces of the fabric,
The method for producing a swimsuit fabric according to claim 5. The swimsuit fabric according to any one of claims 1 to 5 is used for at least a part of a swimsuit, and is fixed so that the back side of the fabric is the skin side of the swimsuit wearer.
A swimsuit characterized by that. The swimsuit fabric according to any one of claims 1 to 5 is used in at least one place of a swimsuit wearer's chest, waist, bottom part, and ankle so that the back side of the fabric is on the swimsuit wearer's skin side. Stuck,
A swimsuit characterized by that.

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