KR101969237B1 - Manufacturing method of fabric for shoe upper - Google Patents

Abstract

The present invention relates to a method of manufacturing fabric for shoe upper and, more specifically, to a method of manufacturing fabric for shoe upper, capable of satisfying the thickness and elasticity at the same time and enabling uniform dyeing. According to the present invention, the method of manufacturing fabric for shoe upper comprises the following steps of: unwinding a first polyester yarn and a second polyester yarn, and a first polyurethane yarn and a second polyurethane yarn wound around a plurality of bobbins in a straight line, and supplying the same; combining the supplied first polyester yarn and first polyurethane yarn as a first braiding and combining the second polyester yarn and the second polyurethane yarn as a second braiding; manufacturing fabric by knitting the first braiding and the second braiding by a circular knitting machine; cutting one side of the manufactured fabric; and dyeing the cut fabric to correspond to a predetermined dyeing pattern.

Description

Technical Field [0001] The present invention relates to a method of manufacturing a fabric for a shoe upper,

The present invention relates to a method of manufacturing a fabric for a shoe upper for manufacturing a fabric used as an upper of a shoe.

Generally, a shoe is composed of a sole comprising an insole, a sole and a sole to support the sole, and an upper which is installed along the edge of the sole and surrounds the toe.

Here, the sole is made of elastic material such as rubber, urethane, EVA foam, sponge, etc. to provide cushioning. The upper is made of leather containing natural leather or artificial leather to protect the instep.

However, in recent years, there has been an increasing number of cases in which a fabric material is applied without applying leather material to the upper material so as to meet the purpose of improving the weight of shoes, ventilation, fashionability, productivity and the like. Especially, in case of running shoes such as running shoes, training shoes, basketball shoes, etc., the case of applying the fabric material to the upper is very prominent.

However, unlike fabrics that are applied to clothing, fabrics of fabric materials applied to the upper of a shoe should have the characteristics of being able to hold the foot comfortably so as not to play with the shoe due to the sudden movement of the foot while comfortably covering the foot, For this purpose, the fabric for the shoe upper should satisfy both Thickness, Stretch and Tongue Tear Strength at the same time.

Meanwhile, conventional shoe upper fabrics have been applied to various types of yarns, but at least one of the thickness, elasticity, and tearing strength is not satisfactory or exceeds the proper standard due to the difficulty in determining the mixing ratio of selected yarns as well as yarn selection. It is not suitable for use as a shoe upper.

Conventional shoe upper fabrics are formed by circularly knitting a yarn with a circular knitting machine, so that the inside of both ends folded by the circular shape during the dyeing process is not uniformly dyed, causing chromatic aberration, resulting in deterioration of quality and loss of fabric There is a problem.

Therefore, it is necessary to research and develop the fabrication technology that can prevent the color difference in dyeing while having thickness, elasticity and tearing strength which can be used as a shoe upper so as to improve the light weight of shoes, ventilation, fashionability and productivity Do.

Korean Patent Laid-Open Publication No. 10-2017-0104212, September 15, 2017.

Disclosure of the Invention The present invention was made to overcome the above-described problems, and it is an object of the present invention to provide a shoe which can be used as a shoe upper so as to improve the light weight, ventilation, fashionability, productivity, And to provide a method for manufacturing an upper fabric.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to accomplish the above object, the present invention provides a method of manufacturing a fabric for a shoe upper, comprising: winding a first polyester yarn wound around a plurality of bobbins, a second polyester yarn, a first polyurethane yarn and a second polyurethane yarn, step; Folding the supplied first polyester yarn and the first polyurethane yarn into a first yarn, and folding the second yarn and the second poly yarn into a second yarn; Knitting the first ply and the second ply which are folded together with a circular knitting machine to produce a fabric; Cutting one side of the fabric so as to make it wide; And dyeing the woven fabric corresponding to the predetermined staining pattern.

In the supplying step, the first polyurethane yarn and the second polyurethane yarn are characterized by being relatively high denier than the first polyester yarn and the second polyester yarn.

The first polyurethane yarn and the second polyurethane yarn are 350-450 denier, the first polyester yarn is 250-340 denier, and the second polyester yarn is 50-100 denier.

The first polyester yarn and the second polyester yarn are mixed at a higher weight ratio than the first polyurethane yarn and the second polyurethane yarn in the supplying step.

The first polyester yarn and the second polyester yarn are mixed in an amount of 40 to 49 parts by weight and the first polyurethane yarn and the second polyurethane yarn are mixed in a range of 50 to 60 parts by weight.

The first polyester yarn is mixed with 35 to 39 parts by weight and the second polyester yarn is mixed with 5 to 10 parts by weight.

Wherein the knitting is performed by varying an upper and a lower stroke of a needle of the circular knitting machine moving along a needle lifting groove formed in a cam of the circular knitting machine when the first yarn and the second yarn are knitted by using the circular knitting machine, .

Wherein the first and second yarns are moved in accordance with the threshold section while the needles of the knitting machine move along the rising section or the falling section by a threshold section formed in the rising section and the falling section of the needle guide groove, And one of the yarns is further pulled up or pulled down to increase the number of knots.

The dyeing step includes a step of holding both ends of the fabric in a horizontal direction so as not to be curled so as to uniformly dye the fabric.

The present invention according to the above-mentioned constitution provides a fabrics having enhanced shape stability, thickness feeling, toughness, tear strength and elasticity which can be used as a shoe upper by knitting, widening, dyeing and cutting polyester yarn and polyurethane yarn, It is possible to expect the effect that the material of the upper can be easily applied to the fabric, thereby contributing to the diversification of the material of the shoe upper.

FIG. 1 is a flowchart illustrating steps of fabricating a fabric for a shoe upper according to a preferred embodiment of the present invention.
FIG. 2 is a schematic view showing steps of fabricating a fabric for a shoe upper according to a preferred embodiment of the present invention.

The present invention relates to a method for manufacturing a fabric for a shoe upper which has durability capable of uniformly dyeing without generating chromatic aberration while having a thickness and elasticity sufficiently applicable to the upper of a sneaker or the like.

Hereinafter, a method for fabricating a shoe upper fabric according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The method for fabricating a shoe upper according to a preferred embodiment of the present invention includes a supplying step S100, a doubling step S200, a knitting step S300, an opening step S400, a dyeing step S500 And a cutting step S600.

First, the supplying step S100 supplies the first polyester yarn 1, the second polyester yarn 2, the first polyurethane yarn 3 and the second polyurethane yarn 4 as shown in Fig. .

At this time, the first polyester yarn 1, the second polyester yarn 2, the first polyurethane yarn 3 and the second polyurethane yarn 4 each have a plurality of first bobbins, a second bobbin, Since the bobbin and the fourth bobbin are wound on each other, they are continuously fed in a straight line.

That is, the first polyester yarn 1, the second polyester yarn 2, the first polyurethane yarn 3, and the second polyurethane yarn 4, each of which is composed of a plurality of strands, are successively supplied so as not to intertwine with each other .

2, the first polyester yarn 1, the second polyester yarn 2, and the first polyurethane yarn (not shown) supplied through the supplying step S100 3) and the second polyurethane yarn (4).

That is, one strand of the first polyester yarn (1) and one strand of the first polyurethane yarn (3) are constituted as a pair and joined together by the first yarn (10) Two polyurethane yarns (4) are arranged in a pair and joined together by a second yarn (20). The first polyester yarn 1, the second polyester yarn 2, the first polyurethane yarn 3 and the second polyurethane yarn 4 are then wound on the first yarn 10 and the second yarn 10, And the first and second pads 20 and 20 are folded.

Here, the polyester yarn and the polyurethane yarn are folded together so that the shape stability of the fabric exhibited by the polyester yarn, the toughness and the tear strength, and the elasticity and the thickness feeling of the fabric exhibited by the polyurethane yarn are harmonized, And to fabricate fabrics having shape stability, thickness, elasticity and tear strength.

When the first polyester yarn 1 and the first polyurethane yarn 3 and the second polyester yarn 2 and the second polyurethane yarn 4 are folded together, they can be twisted or simply joined together In this case, the polyester yarns and the polyurethane yarns are selected in such a manner as to combine the above-mentioned characteristics.

On the other hand, the first polyurethane yarn (3) and the second polyurethane yarn (4) use a material having a relatively higher denier than the first polyester yarn (1) and the second polyester yarn (2). And the first polyester yarn (1) uses a yarn having a relatively higher denier than the second polyester yarn (2).

Preferably, the first polyurethane yarn 3 and the second polyurethane yarn 4 have a denier of 350 to 450 denier, the first polyester yarn 1 has a denier of 250 to 340 denier, the second polyester yarn 2 has a denier of 50 ~ 100 denier can be used.

The denier difference between the first polyester yarn (1) and the second polyester yarn (2) is set to be higher than the denier of the polyurethane yarn, .

In addition, the first polyurethane yarn 3 and the second polyurethane yarn 4 are mixed with the first polyester yarn 1 and the second polyester yarn 2 at a relatively higher weight ratio. And the first polyester yarn (1) is mixed with the second polyester yarn (2) at a relatively high weight ratio.

Preferably 35 to 39 parts by weight of the first polyester yarn 1, 5 to 10 parts by weight of the second polyester yarn 2, the first polyurethane yarn 3 and the second polyurethane yarn 4, May be mixed in an amount of 50 to 60 parts by weight. The yarn weight ratio is to secure the shape stability, the thickness feeling, the tearing strength and the elasticity of the fabric in an optimum combination.

Next, the knitting step S300 includes the steps of fabricating the fabric 100 by knitting a plurality of strands of the first yarn 10 and the second yarn 20, which are folded through the yarn combining step S200, to be.

At this time, in step S300, the fabric 100 may be manufactured by knitting the first yarn 10 and the second yarn 20 using a circular knitting machine. The fabric 100 produced by the circular knitting machine has a circular shape according to characteristics of the circular knitting machine.

However, when knitting the first yarn 10 and the second yarn 20 by a circular knitting machine, the vertical stroke at which the needles of the circular knitting machine move along the needle lift groove formed in the cam of the circular knitting machine can be varied to control the knitting.

At this time, a threshold section is formed in each of the rising section and the falling section of the needle guide groove of the circular knitting machine. That is, when the needle of the circular knitting machine moves along the rising section and the falling section of the needle guide groove and passes through the threshold section, one of the first ten yarn 10 and the second twin yarn 20 is instantaneously pulled up or down, Knit while increasing.

As described above, one of the first yarn 10 or the second yarn 20 is further pulled up or down to be knitted while instantaneously expanding the knot, as the first yarn 10 and the second yarn 20 This is to solve the resistance that occurs when the first polyurethane yarn (3) and the second polyurethane yarn (4) are knitted due to the relatively high denier.

Accordingly, the first polyurethane yarn (3) and the second polyurethane yarn (4) are knitted together as the knitted fabric is instantly increased while instantaneously pulling the first pile yarn (10) or the second pile yarn The fabric 100 can be smoothly knitted despite the relatively high denier.

Next, the opening step S400 is a step of cutting one side of the fabric 100 knitted through the knitting step S300 as shown in FIG.

That is, the widening step (S400) is for winding one flat side fabric 100 made by a circular knitting machine and spreading the planar woven fabric 200 in a plane shape on the bobbin. In this case, an opener provided at the lower part of the circular knitting machine and equipped with a cutting knife at one side can be used.

Therefore, the fabric 100, which is manufactured in a circular shape by the circular knitting machine, is cut into the flat fabric 200 while being cut in the longitudinal direction by the cutting knife of the expander in the course of passing through the expander, do.

Therefore, the fabric 200 can be wound around the bobbin in an open state, and there is no folded portion in the fabric 200. Accordingly, the color difference caused by the folded portion can be prevented, and the dyeability of the fabric 200 can be greatly improved have.

Next, the dyeing step S500 is a step of dyeing the fabric 200 spread in a plane through the opening step S400.

At this time, since the fabric 200 is applied to a shoe upper, it is dyed corresponding to a predetermined staining pattern to match each unit constituting the shoe upper during dyeing.

However, both side ends of the raw fabric 200 are held while being held in a horizontal direction so that both ends of the raw fabric 200 are not rolled up due to the elasticity of the raw fabric 200 when the raw fabric 200 is stained.

Finally, the cutting step S600 is a step of cutting the dyed fabric 200 through the dyeing step S500.

At this time, the fabric 200 is cut so as to correspond to a predetermined cut pattern corresponding to each unit component of the shoe upper to which the fabric 200 is applied.

The results of evaluating the physical properties of the shoe costume fabrics fabricated by the fabricating method for a shoe upper according to a preferred embodiment of the present invention will be described in detail in comparison with comparative examples in which the denier and weight parts of the yarn are different.

Example

Knitted, woven, and dyed using the first polyurethane yarn of 300 denier, the first polyurethane yarn of 420 denier, the second polyester yarn of 75 denier, and the second polyurethane yarn of 420 denier. .

38 parts by weight of the first polyester yarn, 9 parts by weight of the second polyester yarn, and 53 parts by weight of the first polyurethane yarn and the second polyurethane yarn.

Comparative Example 1

Knitted, expanded and dyed using a first polyester yarn of 300 denier, a first polyurethane yarn of 210 denier, a second polyester yarn of 300 denier, and a second polyurethane yarn of 210 denier. .

The first polyester yarn and the second polyester yarn were mixed with 80 parts by weight, and the first polyurethane yarn and the second polyurethane yarn were mixed with 20 parts by weight, respectively.

Comparative Example 2

Knitted, woven, and dyed using a first polyester yarn of 150 denier, a first polyurethane yarn of 420 denier, a second polyester yarn of 75 denier, and a second polyurethane yarn of 420 denier. .

23 parts by weight of the first polyester yarn, 12 parts by weight of the second polyester yarn and 65 parts by weight of the first polyurethane yarn and 65 parts by weight of the second polyurethane yarn, respectively.

* Fabric Properties Test

The fabric for the shoe upper produced according to each of the above Examples and Comparative Examples 1 and 2 was fabricated under the same conditions under the same conditions of thickness (mm), tensile strength (kg / 2.54 mm), elongation (%), (Tongue Tear, kg), and color fastness (grade).

division thickness The tensile strength Elongation rate Phosphorus strength Dye fastness Lengthwise Width direction Lengthwise Width direction Lengthwise Width regulation Example 1.45 57.8 41.2 280 349 10.7 10.3 4.5 Comparative Example 1 1.80 83 30.5 217.6 325.3 8.4 8.23 4.5 Comparative Example 2 1.45 51 16.2 227 220 8.7 8.3 4.5

According to the results shown in Table 1, the elongation and tear strength of Examples are higher than those of Comparative Examples 1 and 2. It can be seen that the difference between the longitudinal direction and the width direction of the tensile strength of the Examples is relatively smaller than that of Comparative Examples 1 and 2. In addition, in Examples and Comparative Examples 1 and 2, it can be seen that both of the dye fastnesses are excellent.

INDUSTRIAL APPLICABILITY As described above, the present invention can provide a fabric having improved shape stability, thickness feeling, tear strength and elasticity, which can be used as a shoe upper, by knitting, widening, dyeing and cutting polyester yarn and polyurethane yarn.

The above-described embodiments are merely illustrative, and various modifications may be made by those skilled in the art without departing from the scope of the present invention.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also various other modified embodiments according to the technical idea of the invention described in the following claims.

S100: Supply step
S200:
S300: Knitting step
S400:
S500: Dyeing step
S600: Foundation stage
1: First polyester yarn
2: Second polyester yarn
3: First polyurethane yarn
4: Second polyurethane yarn
10: 1st concatenation
20: Pair 2
100, 200: Fabric

Claims (9)

Feeding a first polyester yarn and a second polyester yarn wound around a plurality of bobbins, a first polyurethane yarn and a second polyurethane yarn in a straight line;
Folding the supplied first polyester yarn and the first polyurethane yarn into a first yarn, and folding the second yarn and the second poly yarn into a second yarn;
Knitting the first ply and the second ply which are folded together with a circular knitting machine to produce a fabric;
Cutting one side of the fabric so as to make it wide; And
And dyeing the woven fabric corresponding to the predetermined staining pattern,
In the supplying step
The first polyurethane yarn and the second polyurethane yarn have a denier higher than that of the first polyester yarn and the second polyester yarn, and the first polyurethane yarn and the second polyurethane yarn have a denier of 350-450 denier, The first polyester yarn is from 250 to 340 denier, the second polyester yarn is from 50 to 100 denier,
In the supplying step
The first polyester yarn and the second polyester yarn are mixed in a weight ratio lower than that of the first polyurethane yarn and the second polyurethane yarn so that the first polyester yarn is 35 to 39 parts by weight, 10 parts by weight of the first polyurethane yarn and 50 to 60 parts by weight of the second polyurethane yarn,
The step of knitting
Wherein the upper and lower strokes of the circular knitting machine move along a needle lift groove formed in a cam of the circular knitting machine when the first and second yarns are knitted by using the circular knitting machine, The needle of the circular knitting machine moves along the rising section or the falling section by the threshold section formed in the rising section and the falling section of the circular section, And further pulling up or lowering the knitted fabric so as to knit the knitted fabric. delete delete delete delete delete delete delete The method according to claim 1,
The dyeing step
And holding each side end of the fabric in a horizontal direction so as not to be curled so as to uniformly dye the fabric.

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