JPH07300749A - Stretchable warp knit fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain stretchable warp knit fabric having good stretchability and recovery properties by forming all of the loops of the knitted meshes with non-elastic yarns and inserting a plurality of elastic yarns different in yarn fineness as wale yarns. CONSTITUTION:Non-elastic yarns 10 consisting of 20-75de nylon filaments or 35-54de nylon staple fibers, the first elastic yarns 20 of 40-560de urethane filaments and the second elastic yarns 30 thinner than the first yarns of 20-105de are used to form warp knitted fabric which satisfies the relations of the expressions: 0.21A<=X<=0.29A, 0.55<=Y<=0.69B and (4.5C+0.04A-35)<=Z<=(5.5C +0.05A-43) where the yarn thicknesses of yarns 10, 20 and 30 are represented by A, B and C in denier and the unit mesh weights are represented by X, Y and Z in g/3636 filaments/10R. Further in every mesh, the loops are made of non-elastic yarns 10, the first elastic yarns 20 are inserted into all of the wales at a 1-2 stitches every course, while the second elastic yarns 30 are inserted into the all of the wales at 1-3 stitches at a passing angle of 0-25 deg. to give the objective stretchable warp knit fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable warp knitted fabric and a method for producing the same, and more particularly to a stretchable warp knitted fabric which has good stretchability and recoverability and is suitable for use in various innerwear and outerwear. The present invention relates to a warp knitted fabric and a method for manufacturing such a stretchable warp knitted fabric.

[0002]

2. Description of the Related Art Conventionally, as a knitted fabric for innerwear such as pants, girdles and body suits, a non-elastic yarn made of synthetic fiber such as nylon and a polyurethane elastic yarn are knitted with a tricot machine or a Russell machine to form a warp knit elastic. Cloth,
Alternatively, a plain knitted fabric knitted by a circular knitting machine was used.

In such stretchable warp knitted fabrics, the elongation in each of the vertical and horizontal directions, the tension on the body, and other characteristics must be set to appropriate conditions in accordance with the intended use. However, ordinary knitted fabrics have not been able to have sufficient stretchability required for the above-mentioned applications. Therefore, the present inventors have found that a stretchable warp knitted fabric having far more stretchability than the conventional one can be obtained by changing the combination of yarns constituting the warp knitted fabric and the knitting structure, and this stretchability About warp knitted fabric, Japanese Patent Application No. 54-3592
We have applied for utility model registration as No. 1 (Jitsuko Sho 59-2).
148).

In this stretchable warp knitted fabric, synthetic fiber yarns such as nylon are alternately knitted for knitting every several courses into wales on both sides or on one side to form a warp knitted fabric structure. The elastic yarns are repeatedly inserted in a zigzag pattern for each course in the same wale in the inside (back side) of the structure, and further, the elastic yarns for the same number of courses are arranged inside the warp knitted fabric structure. Each side is repeatedly knitted with the same width of wale on each side. This stretchable warp knitted fabric combines two types of stretchable yarns, that is, elastic yarns, and the above synthetic fiber yarns, that is, inelastic yarns, in the knitting structure as described above, thereby providing good stretchability in both the vertical and horizontal directions. In addition, it is possible to provide sufficient properties in terms of power and to provide a material suitable for innerwear and the like.

[0005]

However, even in the case of the stretchable warp knitted fabric having the improved knitting structure of the above-mentioned prior art, if the combination of yarns used is not appropriate, the knitted fabric may have stretchability but knitting. It will be poor in practical performance as a ground. This is because in the stretchable warp knitted fabric, the stretchability of the yarn itself and the stretchability due to the specific knitting structure are subtly associated with each other, so that the stretchability as a knitted fabric is exhibited. If you balance the excellent elongation properties of elastic yarns with the function of non-elastic yarns that form and retain the ground structure and the basic knitting properties, the overall performance will be excellent. It was not fully known whether a stretchable warp knitted fabric could be obtained.

The stretchable warp knitted fabric is not simply stretched when a high stretchability is required due to various uses as described above, or when a high stretchability is required in one direction of the length or width. In some cases, the texture of the surface of the knitted fabric becomes important when the tightness that appropriately tightens the body in a stretched state is required. It is necessary to change the combination of elastic yarn and non-elastic yarn according to each application, but if the amount or thickness of elastic yarn or non-elastic yarn is changed in order to improve one performance, other performance will be changed. Will be reduced. It has been very difficult to obtain a stretchable warp knitted fabric having necessary stretchability properties and satisfying the basic performance as a knitted fabric according to the required performance in each application.

For example, even if it has elasticity, if it repeatedly stretches and shrinks, yarn breakage and cracks will occur, which is not practical, and it is difficult to use if the knitted fabric is easily curled, and if the tear strength or burst strength is weak. The durability as a knitted fabric is poor and the practicality is poor. Further, even if these properties are excellent, if the appearance quality of the knitted fabric is poor, the product has no commercial value.

Specifically, as an elastic warp knitted fabric of the above-mentioned knitting structure, when an attempt is made to obtain a knitted fabric which is excellent in elasticity and at the same time has a thin finished fabric and a soft feel, a non-elastic yarn and an elastic yarn are used. Both of them are made of thin thread, which gives you a firm feeling.
Moreover, it is conceivable to use thick threads when trying to obtain a fabric with a strong adjusting force. However, even if a warp knitted fabric is manufactured using the yarn as described above, if the braid amount of the inelastic yarn is small,
Finished fabric has less vertical stretch, thread breakage,
Defects such as pinholes and curls are likely to occur. Also,
When the amount of the non-elastic yarns woven in is large, the elongation of the finished cloth is good, but fraying and cracking of the cloth are likely to occur. Even if the amount of braid is the same, if the thickness of the inelastic yarn changes,
Also, the characteristics of the dough will change.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to have not only excellent stretchability, but also highly practical stretchability having sufficient basic performance required as a knitted fabric. It is to provide a warp knitted fabric. Another object is to provide a method for producing such a stretchable warp knitted fabric.

[0010]

The stretchable warp knitted fabric according to the present invention for solving the above-mentioned problems is composed of an inelastic yarn and two kinds of elastic yarns, and the inelastic yarn forms a loop at all stitches. However, the first elastic yarn is 1 per course over the entire wale.
A knitted fabric having a knitting structure inserted with a swing width of 2 needles, and the second elastic yarn is inserted with a swing width of 1 to 3 needles per course over the entire wale. Saga
20-75 denier for long fiber yarn, 35-35 for short fiber yarn
54 denier and the thickness of the first elastic yarn is 40 to 56
0 denier, the thickness of the second elastic yarn is 20 to 105 denier, the thickness of the first elastic yarn is equal to or larger than the thickness of the second elastic yarn, and the second elastic yarn moves in the wale direction. The stretchable warp knitted fabric is characterized in that the running angle is 0 to 25 °, and the thickness of each yarn and the weight per unit stitch satisfy the relationships of the following expressions (1) to (3).

0.21A <= X <= 0.29A (1) 0.55B <= Y <= 0.69B (2) 4.5C + 0.04A-35 <= Z <= 5.5C + 0.
05A-43 (3) where A: thickness of first elastic yarn (denier) B: thickness of second elastic yarn (denier) C: thickness of inelastic yarn (denier) X: Weight per unit stitch of 1 elastic yarn (g / 3636 yarns /
10R) Y: Weight per unit stitch of the second elastic yarn (g / 3636 yarns /
10R) Z: Weight per unit stitch of non-elastic yarn (g / 3636 yarns / 10
R) The basic knitting structure itself of the warp knitted fabric is as described above
It may be the same as the prior art disclosed in Japanese Patent Publication No. 2148. As the warp knitting machine, a warp knitting machine such as an ordinary Raschel machine can be used. However, as a warp knitting machine, a machine provided with a plurality of reeds is used, in which one row or a plurality of rows of the reeds are each passed with a full set of non-elastic yarns, and a rear side of the first elastic yarns and It is preferable that the second elastic yarns are passed through in a full set for knitting. Any of the reed arrangement of the first elastic yarn and the second elastic yarn may come first.

In the present invention, as the non-elastic yarn, nylon,
Either long fibers such as polyester or short fibers such as cotton or acrylic can be used, and any material can be used depending on the use and required quality of the warp knitted fabric. A non-elastic yarn having a relatively small elongation is used, and usually, an elongation of 60% or less is used. Although the thickness of the non-elastic yarn varies depending on the number of non-elastic yarns in a plurality of rows to be combined, it is usually 20 to 75 denier when the individual non-elastic yarn is long fiber,
35 to 5 including 100 to 150 count (53.1 to 35.4 denier when converted to denier) in cotton count for short fiber yarn
Use 4 denier yarn. And the number of rows of inelastic yarn is
Normally, one row is sufficient, but two or more rows may be provided if necessary. When the number of rows of non-elastic yarns increases, it is preferable to make the thickness of each non-elastic yarn thin. If the non-elastic yarn is thick, the finished density of the manufactured warp knitted fabric is less likely to be included and the elongation is less likely to occur, compared with the density on the knitting machine at the time of knitting, which is not preferable. If the non-elastic yarn is thin, the durability is poor.

As the first and second elastic yarns, various fibers having excellent elasticity can be used, and for example, highly elastic polyurethane yarn, so-called spandex is preferable. Also,
A covering thread in which long fibers such as nylon are twisted together with elastic threads, and a covering thread in which spun yarn such as cotton is twisted together,
So-called coated elastic yarns or composite elastic yarns such as core yarns are also used as the elastic yarns in the present invention.
The elongation of the elastic yarn is preferably 400% or more. As the elastic yarn, 40 to 560 denier, preferably 105 to 560 denier is used for the first elastic yarn, and 20 to 105 denier, preferably 40 to 70 denier is used for the second elastic yarn. Further, normally, a thread thicker than the second elastic thread is used for the first elastic thread, but there are cases where the first elastic thread and the second elastic thread have the same thickness. If the first elastic yarn is less than 40 denier, it is not preferable because the density is difficult to enter in the vertical direction, the vertical elongation does not appear, and the vertical power is weak so that the intended function cannot be exhibited. When the second elastic yarn is less than 20 denier, it is not preferable because the density is difficult to enter in the lateral direction, the lateral elongation does not appear, and the kickback in the lateral direction becomes weak. When the first elastic yarn exceeds 560 denier,
This is not preferable because the fabric becomes thick and heavy and the power becomes too strong. If the second elastic yarn exceeds 105 denier, the fabric becomes stiff and becomes rubbery, which is not suitable for clothing.

Good knitting property is imparted to the knitted fabric by interlacing the first and second elastic yarns with a constant swing width to the basic knitted fabric structure made of the non-elastic yarn as described above. can do. Of the two types of elastic yarn, the first elastic yarn is inserted with a swing width of 1 to 2 needles per course over the entire wale. Normally, the needle is swung in a zigzag manner, that is, in the same wale, that is, in the same wale, with one needle in each course. However, in some cases, the swing width is two stitches, or in some cases, a course having one swing width and a course having two swing widths are mixed. If the swing width is 3 stitches or more, the threads overlap and become thick, and the fabric does not easily shrink in the vertical direction, and the fabric does not stretch. Moreover, the power in the horizontal direction becomes too strong, which causes a problem such as horizontal winding (curl) of the cloth, which is not preferable.

The second elastic yarn is inserted with a swing width of 1 to 3 stitches per course over the entire wale. Normally,
A course having the same swing width as that of the first elastic yarn and a course having a swing width of 3 needles or less, which is wider than the first elastic yarn, are inserted so as to coexist over the entire wale. in this case,
The swing width of the second elastic yarn does not become narrower than the swing width of the first elastic yarn. According to this structure, when the knitted fabric is formed, the first elastic yarn having a relatively small swing width can exhibit excellent elasticity in the vertical direction, and the second elastic yarn having a relatively wide swing width can be exhibited.
The elastic thread can exert excellent elasticity in the horizontal direction. More specifically, the second elastic yarn is arranged such that a course having a swing width of 2 needles is arranged every several courses based on a course having a swing width of 1 needle. If the swing width of the second elastic yarn is 4 stitches or more, it will be difficult to shrink after knitting, so the warp knitted fabric will not stretch and it will feel stiff, and it is unsuitable as a material for innerwear and the like, and the cost is also high. It is expensive and not preferable.

When there is only one kind of elastic yarn, in other words, when the thickness and knitting structure of the first elastic yarn and the second elastic yarn are all the same, the elasticity in only one direction of the vertical direction or the horizontal direction is possible. However, it is not preferable because it is not possible to have appropriate elasticity in both vertical and horizontal directions. Using elastic and inelastic threads as described above,
The stretchable warp knitted fabric of the present invention can be obtained by setting the operating conditions of the warp knitting machine so that the above knitting structure is knitted. The specific knitting procedure may be an appropriate combination of conventional warp knitting techniques. However, in the present invention, the properties of the obtained warp knitted fabric satisfy the following conditions.

First, the angle is set to 0 to 25 ° while the second elastic yarn moves in the wale direction. In the knitting structure, the second elastic yarn is knitted while moving in the wale direction from one course to an adjacent course. At this time, an angle formed by a portion of the second elastic yarn, which extends between the courses in the wale direction, with respect to the wale direction defined as a direction orthogonal to each course direction is referred to as the span angle. The crossing angle is defined in the angle range. The crossing angle can be measured by observing the structure of the knitted fabric, but the measurement can be easily performed by treating the knitted fabric with an acid or the like to remove the non-elastic yarn and leave only the elastic yarn.

The crossing angle is the ratio of the amount of the second elastic yarn supplied to the amount of the other yarn supplied during knitting, the tension applied to the knitted fabric during knitting, and the dyeing arrangement of the knitted fabric. It can be adjusted by the ratio of density adjustment by pushing and pulling the horizontal and vertical added. Next, the thicknesses A to C of the yarns and the weights X to Z of the yarns per unit stitch are defined so as to satisfy the expressions (1) to (3).

The weight per unit stitch is obtained by disassembling a fixed number of knitted fabrics and measuring the weight of each constituent yarn.
The weight measured here is a value including the loss of the oil agent and the like at the time of greige and the adhesion of the finishing agent after dyeing and arrangement. The weight per unit stitch of each constituent yarn of the knitted fabric changes depending on the thickness and length of the yarn included in the number of unit stitches of the knitted fabric.
If the thickness of the yarn is the same, the weight per unit stitch in the knitted fabric can be changed by adjusting the amount of each constituent yarn supplied during knitting. In the present invention, the weight per unit stitch of X to
It is preferable that Z satisfies the above formulas (1) to (3).

The amount of each yarn constituting the warp knitted fabric is 820 to 1437 mm / R for the non-elastic yarn and 95 to 13 for the first elastic yarn.
0mm / R (warp stretch 75%), the second elastic yarn is 28
It is preferable that it is from 0 to 350 mm / R (warp stretch 100%). Where mm / R is 1 rack (4
It means the yarn feed amount mm per 80 courses). This yarn feed amount
Since mm / R changes depending on the size of the warp stretch, if the warp stretch of the first and second elastic yarns is different from the above, it is converted from the yarn feed amount in the case of 75% or 100%. Then, the yarn feeding amount in each case is set. The yarn feeding amount can be adjusted by the yarn feeding device of the warp knitting machine, but an accurate yarn feeding amount is calculated from the amount of each yarn per unit stitch of the warp knitted fabric finally obtained, and the yarn feeding device It is preferable to feed back to the adjustment operation of.

If the amount of the first elastic yarn supplied is too small, the finished fabric is likely to be broken, slipped, or curled.
If the supply amount of the first elastic yarn is too large, the density in the vertical direction does not enter, and the fabric has a small elongation in the vertical direction. If the amount of the second elastic yarn supplied is too small, the width of the cloth becomes large and the cost becomes high, and when the cloth is strongly pulled in the horizontal direction, thread breakage occurs and the eyes collapse. If the amount of the second elastic yarn supplied is too large,
The effect of inserting the elastic thread is not exhibited, the width in the horizontal direction is not entered, the elongation is small, and the fabric does not have a good kickback, and the surface of the fabric does not have a smooth satin finish. . In addition, it is necessary to adjust the yarn feed amount of each yarn so that the weight per unit stitch X to Z satisfying the above formulas (1) to (3) is achieved within the above-mentioned yarn feed amount range. is there.

The stretchable warp knitted fabric of the present invention can be used in various applications where stretchable warp knitted fabrics have been conventionally used,
For example, it is suitable for innerwear such as girdles and body suits, sportswear such as swimwear and leotards, and the like.

[0023]

The basic structure of the above-mentioned warp knitted fabric is composed of the non-elastic yarn and the two kinds of elastic yarns, the non-elastic yarn forms a loop at all stitches, and the first elastic yarn is all wales. It is inserted with a swing width of 1 to 2 stitches per course over the second
The knitted fabric having a knitting structure in which the elastic yarn of No. 3 is inserted with a swing width of 3 needles or less per one course over all wales, as disclosed in the above-mentioned prior art publication, has excellent stretchability. It is known as the ground.

The inventors of the present invention found out the conditions of the present invention as a stretchable warp knitted fabric having the above-mentioned knitting structure by conducting tests with various combinations of yarns and knitting conditions. First,
If the thicknesses of the non-elastic yarn and the first and second elastic yarns used are within the specified range, the functions and characteristics of each yarn can be effectively utilized, and the relational expressions of the above formulas (1) to (3) Can be applied well.

Also, by defining the angle over which the second elastic yarn moves in the wale direction within the above range, the balance of stretchability in both vertical and horizontal directions becomes good. this is,
The elastic yarn can exert an elastic stretching force when stretched in its length direction. Therefore, in the knitting structure, the first elastic yarn knitted substantially in the course direction has a great influence on the elasticity in the course direction, and the second elastic yarn moving in the wale direction between different courses is the wale direction of the knitted fabric. Has a great effect on stretchability. Therefore, it is better that the second elastic yarn is knitted as parallel to the wale direction as possible. The smaller the crossing angle, the more the second elastic yarns are knitted in a state of being parallel to the wale direction, so that the stretchability of the knitted fabric in the wale direction becomes better.

Next, in the above formula (1), the thickness A of the first elastic yarn to the weight X per unit stitch of the first elastic yarn is defined,
Formula (2) defines the thickness B of the second elastic yarn per unit stitch weight Y of the second elastic yarn, and formula (3) defines the thickness C of the non-elastic yarn and the thickness of the first elastic yarn. By defining the weight Z per unit stitch of the inelastic yarn based on A, the balance between the functions and characteristics of the elastic yarn and the inelastic yarn becomes good. In the knitting structure, the first elastic yarn, which is relatively thick among the elastic yarns and is linearly knitted in the course direction, has a great influence on the elastic deformability of the entire knitted fabric. The second elastic yarn greatly affects the elastic deformability of the knitted fabric in the weft direction. Further, since the non-elastic yarn has a great influence on the basic characteristics of the fabric, the thickness of the non-elastic yarn and the weight per unit stitch are also important factors for improving the quality performance of the knitted fabric. Therefore, as a result of considering the correlation between these factors that have an important influence on the characteristics of the knitted fabric based on a large number of test results,
It was found that the relationships of the expressions (1) to (3) are necessary conditions for a stretchable warp knitted fabric having high quality performance.

Even if the thicknesses A to C of the yarns are changed in accordance with the required performance of the knitted fabric, the thicknesses A to C of the yarns and the weights X to Z per unit stitch are correspondingly changed. If the remaining conditions are adjusted, the obtained knitted fabric becomes a practical knitted fabric having desired stretchability and excellent basic performance required as a knitted fabric.

[0028]

【Example】

-Example 1- <War knitting machine> Raschel machine made by KARL MAYER type RE4N, 130 inch width, 56GG <Using thread> Front: non-elastic thread nylon 66, 40d-20Br
Deformed (made by Toray) Middle: First elastic yarn Operon 210d-127C
(Toray DuPont) Back: Second elastic yarn Operon 40-127C (Toray DuPont) <Reed arrangement to reed> Front, middle and back full set <knitting structure> Front: 42/24/20/24 / 42/46 // Middle ： 22/00 // Back ： 22/00/66/44/66/00 // Fig. 1 is a concrete knitting organization chart, and Fig. 2 is a model of the state of disassembling The organizational chart is shown. In the figure, the warp knitted fabric is
Non-elastic yarn 10, first elastic yarn 20 and second elastic yarn 30
It is composed of.

<Amount of yarn supplied> The amount of yarn supplied was appropriately adjusted so that the weight per unit stitch described later could be obtained. Knitting was performed under the above conditions to produce a stretchable warp knitted fabric. The properties of the resulting stretchable warp knitted fabric were as follows. <Finishing amount, fabric thickness> Course: 202.2c / in Wale: 53.6w / in Fabric thickness = 0.53-0.54mm <Weight per unit stitch> Inelastic yarn: 172.6g / 3636 yarns / 10R First elastic yarn: 49.7 g / 3636 yarns / 10R Second elastic yarn: 24.3 g / 3636 yarns / 10R <Angle of the second elastic yarn> A sample cut to about 5 cm ² was used, and the concentration of the hydrochloric acid was 20%. The solution was thoroughly stirred in the flask. Nylon constituting the non-elastic yarn in the sample melted, and the first and second elastic yarns made of polyurethane remained in the knitted state by contact fusion in a crossed form. Even when the combination of the yarns forming the knitted fabric is different, the same operation may be performed using a solvent that does not dissolve the elastic yarn but only the inelastic yarn.

The appearance of the treated knitted fabric is shown schematically in FIG. It can be seen that the second elastic yarn 30 (adjacent yarns are distinguished by changing the pattern) is moving between the courses in the wale direction with respect to the first elastic yarn 20 extending in the course direction. In this state, a virtual horizontal line L was set in the wale direction, and the inclination angle of the second elastic yarn 30 with respect to the horizontal line L, that is, the crossing angle θ was measured.

Stretching angle θ in the wale direction θ = 16 ° <Physical properties> In both the vertical and horizontal directions of the warp knitted fabric, a stretchability evaluation test was conducted by repeating loading and unloading. The degree was calculated. The test conditions were a sample width of 2.5 cm, a gripping distance of 10 cm, and a pulling speed of 300 mm / min. The power value indicates a value at each elongation rate of 15 to 80% in the third cycle. When the elongation rate is 15 to 50%, the values of the loading process / unloading process are shown. The elongation recovery rate shows the value of the 1st cycle / 3rd cycle. The elongation is the value in the first cycle.

Vertical direction Horizontal direction Power (g) Expansion rate 15% 95/85 51/27 (30% when loaded 181/165 151/71 / unloaded) 50% 284/257 324/163 80% 462 731 Expansion Recovery rate (%) 97.3 / 96.5 95.5 / 94.1 (1st / 3rd time) Elongation (%) Load 1.0kg 172 90 1.5kg 235 119 2.25kg 292 157 <Expansion resistance Fatigue> Test device: Stretching fatigue tester Preparation of sample: (Unsewn test) Take a 17 cm x 9 cm test piece in the direction of the elastic thread.

(Sewing test) 9.5 in the direction in which the elastic thread is inserted.
Two test pieces of cm × 9 cm are prepared and one piece is sewn in the knitting start direction and one piece is sewn in the knitting end direction. The stitches are over 2 stitches, the stitches are 13 stitches / inch, and the sewing thread is woolly nylon 210.
d, the needle is # 11, and the seam allowance is 7 mm. Test operation: (drying test = D) An unsewn sample is used. Tension interval 7 cm
(Grips at both ends 5 cm), pulling speed 200 rpm, number of times 75
It is measured at 00 times.

(Wet test = W) A sewing sample is used. Except that the test piece is fully immersed in a 0.13% solution of synthetic detergent,
The measurement is performed under the same conditions as in the dry test. (Unsewn twist test) An unsewn sample is sufficiently immersed in pure water, and then the sample is folded in three and twisted at 360 ° and mounted on a tester. The test operation is performed in the same manner as the dry test and the wet test, but the number of times is 2500.

In the horizontal direction 7500 times unsewn test, the dry test is performed in the direction perpendicular to the direction of the first elastic yarn. Test result: Test 1: D7500 times Unsewn elongation 150% OK Test 2: W7000 times Sewn elongation 150% OK Test 3: W2500 times Unsewn twist elongation 150% OK Test 4: W2000 times Unsewn twisting elongation 150 % OK Test 5: Width 7500 times Unsewn Elongation 140% OK <Break strength, tear strength, curl> Measurements were made as follows, and the results are shown in Table 1.

(Burst Strength) The burst strength is determined according to JIS L-1018 A method (Mullen type method). However, since the elongation of the cloth is large, the test cloth is expanded by 50% in all directions for measurement. (Tear strength) It is performed according to JIS L-1018 single tongue method. The numerical reading is expressed by the average value of the three minimum values of the maximum values from the tear load curve.

(Curl) A test piece of 10 cm × 10 cm is left for 4 hours in an atmosphere of a temperature of 20 ± 2 ° C. and a humidity of 65 ± 2% RH, and the texture of the dough is observed. If the tip of the fabric in the vertical or horizontal direction was curled by 360 ° or more, it was determined to be defective. <Appearance and Others> There were no particular problems and the appearance was good. -Example 2-The description of the same items as those in Example 1 is omitted. The same applies to the following examples and comparative examples.

<Use of thread> Front: Non-elastic thread Nylon 66, 30d-7Br variant (manufactured by Toray) Middle: First elastic thread Operon 70d-127C (manufactured by Toray DuPont) Back: Second elastic thread Operon 40-127C (Manufactured by Toray DuPont Co., Ltd.) <Finishing amount, fabric thickness> Course: 171.0 c / in Wale: 54.0 w / in Fabric thickness = 0.41 to 0.42 mm <Weight per unit stitch> Inelastic yarn: 124. 4g / 3636 yarns / 10R First elastic yarn: 15.0g / 3636 yarns / 10R Second elastic yarn: 23.9g / 3636 yarns / 10R <Angle of second elastic yarn> θ = 13 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 26/22 32/17 (30% when loaded 55/45 86/53 / unloaded) 50% 100/80 161/111 80% 198 332 Elongation recovery rate (%) 98. /97.7 94.2 / 92.2 (1st / 3rd) Elongation (%) Load 1.0kg 232 171 1.5kg 259 208 2.25kg 286 242 -Example 3- <Thread use> Front: Inelastic Thread Nylon 66, 40d-20Br
Deformed (made by Toray) Middle: First elastic yarn Operon 210d-127C
(Toray DuPont) Back: Second elastic yarn Operon 40-127C (Toray DuPont) <Finishing amount, cloth thickness> Course: 204.0 c / in Wale: 55.3 w / in cloth thickness = 0.53 ~ 0.54mm <Weight per unit stitch> Non-elastic yarn: 170.2g / 3636 yarns / 10R 1st elastic yarn: 48.1g / 3636 yarns / 10R 2nd elastic yarn: 23.5g / 3636 yarns / 10R <No. 2 Elastic yarn crossing angle> θ = 19 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 96/86 52/25 (30% when loaded 184/168 152/70 / when unloaded) 50% 284/261 324/165 80% 456 694 Elongation recovery rate (%) 97.5 / 96.9 93.2 / 91.4 (1st / 3rd time) Elongation (%) Load 1.0 kg 178 98 1. 5kg 244 130 2.25kg 295 171 -Example 4- <Using thread> Front: Non-elastic thread Nylon, 70d-24SD (manufactured by Toray) Middle: First elastic thread Operon 350d-127 (manufactured by Toray Dupont) Back: Second elastic thread Operon 40- 127 (manufactured by Toray DuPont Co., Ltd.) <Finishing amount, fabric thickness> Course: 162.0 c / in Wale: 51.0 w / in Fabric thickness = 0.60 to 0.61 mm <Weight per unit stitch> Inelastic yarn: 344 0.5g / 3636 yarns / 10R 1st elastic yarn: 93.5g / 3636 yarns / 10R 2nd elastic yarn: 22.6g / 3636 yarns / 10R <angle of second elastic yarn> θ = 23 ° <physical properties> vertical Direction Horizontal direction Power (g) Elongation rate 15% 151/126 46/20 (30% at load 300/258 185/69 / unloading) 50% 485/409 455/212 80% 862 1128 Elongation recovery rate (%) 96.5 / 95.6 93.5 / 91.0 (1st / 3rd time) Elongation (%) Load 1.0 kg 86 66 1.5 kg 154 91 2.25 kg 231 125-Example 5- <Use of thread> Front: Non-elastic thread Nylon, 40d-13Br variant (Toray) Middle: First elastic thread S.I. C. Y: C100'S / Operon 210 (manufactured by Daiwabo Co., Ltd./Toray Dupont Co.) Back: Second elastic yarn Operon 40-127 (manufactured by Toray Dupont Co., Ltd.) <Finishability, Dough Thickness> Course: 177.0 c / in Wale: 52.9 w / in Fabric thickness = 0.49 to 0.50 mm <Weight per unit stitch> Inelastic yarn: 173.3 g / 3636 yarns / 10R 1st elastic yarn: 45.6 g / 3636 yarns / 10R 2nd Elastic yarn: 24.0 g / 3636 yarns / 10R <The crossing angle of the second elastic yarn> θ = 18 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 83/70 47/25 (30% when loaded) 163/139 174/66 / at unloading) 50% 262/227 321/166 80% 464 845 Extension recovery rate (%) 96.0 / 94.8 89.6 / 87.3 (1st / 3rd) Elongation (%) Load 1.0kg 145 5 1.5kg 192 119 2.25kg 229 160 - Comparative Example 1 Example 1, the weight per unit stitch of inelastic yarn,
It is a comparative example showing the case where it is less than the range of the present invention. The description of the items having the same items as those in the first embodiment will be omitted.

<Using thread> Same as in Example 1 <Finishing amount, material thickness> Course: 180.6 c / in Wale: 53.3 w / in material thickness = 0.44 to 0.45 mm <weight per unit stitch> Non-elastic yarn: 146.3 g / 3636 yarns / 10R First elastic yarn: 49.7 g / 3636 yarns / 10R Second elastic yarn: 24.3 g / 3636 yarns / 10R <Angle of second elastic yarn> θ = 14 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 108/92 56/32 (Loaded 30% 203/175 204/96 / Unloaded) 50% 341/277 449/249 80% 668 979 Elongation recovery rate (%) 97.7 / 96.5 95.4 / 93.8 (1st / 3rd time) Elongation (%) Load 1.0kg 108 72 1.5kg 164 105 2.25kg 198 138 <Appearance Other> Trial out of stretch fatigue resistance 1 and test 5
Then, the thread breakage occurred. Vertical curl was maximum. Feeding wrinkles and hanging ears occurred. Therefore, the product value was inferior. -Comparative Example 2-In Example 1, the weight per unit stitch of the non-elastic yarn is
It is a comparative example showing a case where the amount is larger than the range of the present invention.

<Use of thread> Same as in Example 1 <Amount of finish, material thickness> Course: 199.2 c / in Wale: 54.8 w / in material thickness = 0.57 to 0.58 mm <Weight per unit stitch> Non-elastic yarn: 195.3g / 3636 yarns / 10R 1st elastic yarn: 49.7g / 3636 yarns / 10R 2nd elastic yarn: 24.3g / 3636 yarns / 10R <angle of second elastic yarn> θ = 14 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 91/83 45/24 (Loaded 30% 173/160 119/64 / Unloaded) 50% 263/246 243/133 80% 409 526 Elongation recovery rate (%) 97.1 / 96.3 95.6 / 93.8 (1st / 3rd time) Elongation (%) Load 1.0kg 200 118 1.5kg 260 154 2.25kg 314 198 <Appearance Other> Trial out of stretch fatigue resistance 2 to 4, laughter has occurred. The surface of the dough is slightly textured and becomes textured. When you put your finger on the fabric, the growth of the ground structure is large,
The elastic yarn was stretched to the limit and broken. The dough has no elasticity and is loose. -Comparative Example 3-In Example 1, this is a comparative example showing a case where the weight per unit stitch of the first elastic yarn is smaller than the range of the present invention.

<Use of yarn> Same as in Example 1 <Finishing amount, material thickness> Course: 223.2 c / in Wale: 54.5 w / in material thickness = 0.55 to 0.56 mm <weight per unit stitch> Non-elastic yarn: 172.6g / 3636 yarns / 10R 1st elastic yarn: 39.8g / 3636 yarns / 10R 2nd elastic yarn: 24.3g / 3636 yarns / 10R <The crossing angle of the 2nd elastic yarn> θ = 7 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 97/88 58/26 (30% when loaded 180/167 167/76 / unloaded) 50% 273/255 357/171 80% 438 798 Elongation recovery rate (%) 97.1 / 96.6 94.6 / 92.4 (1st / 3rd time) Elongation (%) Load 1.0kg 178 88 1.5kg 238 115 2.25kg 299 154 <Appearance Others> Vertical curl has reached its maximum. Since the vertical density (course) is too high, I want the fabric to be thick. The higher the density, the heavier the fabric weight per unit area and the higher the production cost. -Comparative Example 4-In Comparative Example 1, the weight per unit stitch of the first elastic yarn is larger than the range of the present invention.

<Use of yarn> Same as in Example 1 <Finishing amount, material thickness> Course: 172.8 c / in Wale: 55.4 w / in material thickness = 0.50 to 0.51 mm <weight per unit stitch> Non-elastic yarn: 172.6g / 3636 yarns / 10R 1st elastic yarn: 61.8g / 3636 yarns / 10R 2nd elastic yarn: 24.3g / 3636 yarns / 10R <2nd elastic yarn running angle> θ = 15 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 102/88 42/23 (30% when loaded 192/174 122/61 / unloaded) 50% 299/271 252/142 80% 483 548 Elongation recovery rate (%) 97.4 / 96.8 95.4 / 93.8 (1st / 3rd time) Elongation (%) Load 1.0kg 165 115 1.5kg 215 152 2.25kg 257 193 <Appearance Others> Uses a lot of elastic yarn Riniwa, power, etc. not so high as compared with the embodiment does not improve physical properties, and the cost becomes high only for what you use more material.

Comparative Example 5 This is a comparative example showing a case where the weight per unit stitch of the second elastic yarn is smaller than the range of the present invention in Example 1. <Use of thread> Same as in Example 1 <Finishing amount, material thickness> Course: 204.6c / in Wale: 57.6w / in material thickness = 0.54 to 0.55mm <Weight per unit stitch> Inelastic thread -172.6g / 3636 threads / 10R 1st elastic thread: 49.7g / 3636 threads / 10R 2nd elastic thread: 19.7g / 3636 threads / 10R <2nd elastic thread crossing angle> θ = 13 ° <power , Elongation recovery rate, elongation> Vertical direction Horizontal direction Power (g) Expansion rate 15% 100/90 48/23 (30% when loaded 191/174 142/65 / when unloaded) 50% 297/270 311/154 80% 482 715 Elongation recovery rate (%) 97.2 / 96.7 94.9 / 93.0 (1st / 3rd time) Elongation (%) Load 1.0kg 169 94 1.5kg 239 124 2.25kg 294 163 <Appearance and others> Stretch fatigue resistance Yarn breakage has occurred in the experiment 5. When you put your finger on the fabric, the second elastic yarn breaks immediately. -Comparative Example 6-A comparative example showing a case in which the weight per unit stitch of the second elastic yarn is larger than the range of the present invention in Example 1.

<Use of thread> Same as in Example 1 <Finishing amount, material thickness> Course: 204.0 c / in Wale: 53.0 w / in material thickness = 0.53 to 0.54 mm <weight per unit stitch> Non-elastic yarn: 172.6 g / 3636 yarns / 10R First elastic yarn: 49.7 g / 3636 yarns / 10R Second elastic yarn: 28.1 g / 3636 yarns / 10R <Angle of second elastic yarn> θ = 13 ° <Physical properties> Vertical direction Horizontal direction Power (g) Elongation rate 15% 97/89 51/24 (Loaded 30% 184/170 155/71 / Unloaded) 50% 283/262 341/169 80% 457 749 Elongation recovery rate (%) 97.3 / 96.3 94.0 / 92.5 (1st / 3rd time) Elongation (%) Load 1.0kg 179 91 1.5kg 244 121 2.25kg 299 163 <Appearance Others> All test items are almost full It showed a possible value, because the dough to Kapakapa there is a rubber-like feel, inferior to the commercial value. —Comparative Example 7— This is a comparative example representing a case where the crossing angle θ of the second elastic yarn is outside the range of the present invention in Example 1.

In the same manner as in Example 1, knitting was carried out under the knitting conditions using the yarn, and the knitted fabric was strongly pulled and fixed in the warp (course) direction at the time of dyeing and organizing. <Finishing amount, fabric thickness> Course: 156.0 c / in Wale: 57.4 w / in Fabric thickness = 0.49 to 0.50 mm <Weight per unit stitch> Inelastic yarn: 170.2 g / 3636 yarns / 10R 1st elastic yarn: 48.1g / 3636 yarns / 10R 2nd elastic yarn: 23.5g / 3636 yarns / 10R <angle of 2nd elastic yarn> θ = 27 ° <power, elongation recovery rate, elongation> Vertical Direction Horizontal direction Power (g) Extension rate 15% 77/72 25/15 (30% when loaded 146/135 68/46 / unloaded) 50% 234/214 133/93 80% 425 268 Extension recovery rate (% ) 98.8 / 98.3 94.3 / 92.8 (1st / 3rd time) Elongation (%) Load 1.0kg 163 188 1.5kg 196 226 2.25kg 222 262 <Appearance and others> Stretch resistance In the sex tests 2 to 4, cracks occurred .

[0046]

[Table 1] ───────────────────────────────── Stretching fatigue strength Rupture strength Tear strength Curl appearance kgf / cm ² g ───────────────────────────────── Example 1 OK 2.5 1510 OK ○ Example 2 OK 1 .6 812 OK ○ Example 3 OK 2.6 1557 OK ○ Example 4 OK 3.5 1823 OK ○ Example 5 OK 2.7 1513 OK ○ ─────────────── ────────────────── Comparative Example 1 × 3.0 1291 ×× Comparative Example 2 × 2.1 1529 OK × Comparative Example 3 OK 2.5 1477 ×× Comparative Example 4 OK 2.4 1270 OK ○ Comparative example 5 × 2.4 1601 OK × Comparative example 6 OK 2.5 1496 OK × Comparative example 7 × 2.6 1285 OK ─────────────────────────────────

[0047]

As described above, according to the stretchable warp knitted fabric and the method for producing the same according to the present invention, as described above, a non-elastic yarn and two types of elastic yarns are used, and a specific knitting structure is obtained. In a warp knitted fabric formed by knitting, by defining the relationship between the thickness of the yarns forming the knitted fabric and the weight per unit stitch,
It is possible to provide a stretchable warp knitted fabric having a high commercial value, which not only achieves the improvement of various characteristics due to the specific knitting structure described above but also has a basic function and performance as a knitted fabric.

Specifically, since it has a high degree of elongation as a warp knitted fabric, it can be easily put on and taken off when it is used for clothing, and it can follow the movement of the body when worn, and does not have a feeling of pressure or tightness. Also, in both vertical and horizontal directions, especially in the horizontal direction, there is little difference between the extension force, that is, the load power and the tension force, that is, the unload power, and it shows a characteristic close to a perfect elastic body
The fabric easily follows the complex movements of the body and stretches, and instantly recovers, which makes it very fit.

Further, by changing the thickness and combination of the yarns within the range satisfying the conditional expression of the present invention, the power, elongation rate and elongation recovery rate are suitable for each application and required function. A stretchable warp knitted fabric showing values of various properties can be easily obtained, and can greatly contribute to expansion of applications and increase in demand of this type of stretchable warp knitted fabric.

[Brief description of drawings]

FIG. 1 is a concrete knitting organization chart of a stretchable warp knitted fabric according to an embodiment of the present invention.

FIG. 2 is a schematic knitting organization chart in a state in which each yarn is disassembled.

FIG. 3 is an explanatory view showing a method for measuring an elastic yarn spanning angle.

[Explanation of symbols]

 10 Inelastic Thread 20 First Elastic Thread 30 Second Elastic Thread

Claims (2)

[Claims] 1. A non-elastic yarn and two types of elastic yarns are formed. The non-elastic yarn forms a loop in all stitches, and the first elastic yarn swings 1-2 needles per course over the entire wale. A knitted fabric having a knitting structure inserted by a width, and the second elastic yarn is inserted by a swing width of 1 to 3 needles for each course over the entire wale. 20-75 denier for yarn,
The short fiber yarn has a denier of 35 to 54, the thickness of the first elastic yarn is 40 to 560 denier, the thickness of the second elastic yarn is 20 to 105 denier, and the thickness of the first elastic yarn is the first. It is the same as or thicker than the second elastic yarn, and the angle is 0 to 0 across the second elastic yarn moving in the wale direction.
25 °, and the thickness of each yarn and the weight per unit stitch are expressed by the following formula (1)
A stretchable warp knitted fabric satisfying the relation of the expression (3). 0.21A <= X <= 0.29A (1) 0.55B <= Y <= 0.69B (2) 4.5C + 0.04A-35 <= Z <= 5.5C + 0.
05A-43 (3) where A: thickness of first elastic yarn (denier) B: thickness of second elastic yarn (denier) C: thickness of inelastic yarn (denier) X: Weight per unit stitch of 1 elastic yarn (g / 3636 yarns /
10R) Y: Weight per unit stitch of the second elastic yarn (g / 3636 yarns /
10R) Z: Weight per unit stitch of non-elastic yarn (g / 3636 yarns / 10
R) 2. The method for producing a stretchable warp knitted fabric according to claim 1, wherein a non-elastic yarn and two kinds of elastic yarns are used, and the non-elastic yarn forms a loop at all stitches, and The elastic yarn is inserted with a swing width of 1 to 2 needles per course over the entire wale, and the second elastic yarn has a width equal to that of the first elastic yarn over the entire wale. Widely 3
The knitting is performed so that a course having a swing width equal to or smaller than the needle is mixedly inserted, and the non-elastic yarn and the long-fiber yarn are 2
A yarn having a thickness of 0 to 75 denier and a short fiber yarn of 35 to 54 denier is used. The first elastic yarn is 40 to 560 denier, the second elastic yarn is 20 to 105 denier, and the first elastic yarn is A thread that is the same as or thicker than the second elastic thread is used, and the angle over which the second elastic thread moves in the wale direction is 0 to 25 °.
The thickness of each yarn and the weight per unit stitch are as follows (1)
A method for manufacturing a stretchable warp knitted fabric, which comprises adjusting the amount of yarn supplied to each yarn so as to satisfy the expressions (3) to (3). 0.21A <= X <= 0.29A (1) 0.55B <= Y <= 0.69B (2) 4.5C + 0.04A-35 <= Z <= 5.5C + 0.
05A-43 (3) where A: thickness of first elastic yarn (denier) B: thickness of second elastic yarn (denier) C: thickness of inelastic yarn (denier) X: Weight per unit stitch of 1 elastic yarn (g / 3636 yarns /
10R) Y: Weight per unit stitch of the second elastic yarn (g / 3636 yarns /
10R) Z: Weight per unit stitch of non-elastic yarn (g / 3636 yarns / 10
R)