KR20230090464A - Manufacturing method of shoes upper fabric using Korean paper and shoes upper fabrid majufactured by the same - Google Patents

Abstract

The present invention comprises the steps of preparing a knitted fabric by knitting a yarn containing Korean paper yarn; It relates to a method for manufacturing an upper for shoes using Korean paper, including the step of heating the knitted fabric and stretching it in a horizontal direction to correct the size and shape. Strength as a dragon upper can be secured.

Description

Manufacturing method of shoes upper fabric using Korean paper and shoes upper fabric majufactured by the same}

The present invention relates to a method for manufacturing eco-friendly shoe uppers using Korean paper and a shoe upper manufactured thereby.

In general, shoes are largely composed of an upper and a sole structure. A sole structure consists of a midsole, an outsole, and an outsole, which include a polymer foam material that damps ground reaction forces to relieve stress on the foot and leg during walking, running, and other ambulatory activities, and adds strength. It may include fluid-filled chambers, plates, moderators, or other elements that dampen the foot, increase stability, or affect foot motion.

The outsole is secured to the lower surface of the midsole to provide a ground engaging portion of the sole structure formed of a durable and wear-resistant material such as rubber. The sole structure may also include a sockliner positioned within the cavity and proximate to the lower surface of the foot to enhance footwear comfort.

The upper extends generally over the instep and toe regions of the foot, along the medial and lateral sides of the foot, under the foot, and around the heel region of the foot. In some articles of footwear, such as basketball shoes and boots, the upper may extend over and around the ankle to provide support or protection to the ankle. Access to the cavity within the upper is generally provided by an ankle opening in the heel region of the footwear.

[0003] Various material elements are commonly used to manufacture uppers, and uppers of athletic footwear are formed in a multi-layered structure including various bonded material elements. Unlike the clothing fabric used for clothing, the upper requires a function to stably hold the foot inside the shoe and excellent durability so that it is not easily torn or worn due to friction or folding. To this end, each material element constituting the upper may be selected to impart stretch resistance, abrasion resistance, flexibility, breathability, compressibility, comfort and moisture-wicking.

Existing upper manufacturing technology has been developed in the direction of increasing the light weight, fashionability and productivity of the upper, but since it has been mainly manufactured using synthetic polymer materials, there is a problem of causing environmental pollution, so more environmentally friendly materials have been developed. There is a need to develop a technology for manufacturing shoe uppers.

Registered Patent No. 10-2248233 (registered on April 28, 2021)

An object of the present invention is to provide a method for manufacturing eco-friendly shoe uppers using Korean paper and a shoe upper including Korean paper manufactured according to the method.

One embodiment of the present invention for achieving the above object is to prepare a knitted fabric by knitting a yarn containing Korean paper yarn; It relates to a method for manufacturing an upper for shoes using Korean paper, including the step of correcting dimensions and shape by heating and stretching the knitted fabric in a horizontal direction.

The yarn may include Korean paper yarn, polyester yarn, and spandex yarn.

Prior to the step of preparing the knitted fabric, a dyeing step of dyeing the yarn; may be performed.

The Korean paper yarn may have a fineness of 100 to 300 denier.

The polyester yarn may have a fineness of 500 to 800 denier.

The spandex yarn may have a fineness of 85 to 120 denier.

The yarn may include 44 to 55 wt% of Korean paper yarn, 35 to 49 wt% of polyester yarn, and 5 to 15 wt% of spandex yarn.

Another embodiment of the present invention includes an upper for shoes including Korean paper manufactured according to the above method.

The method for manufacturing uppers for shoes using Korean paper of the present invention is eco-friendly, has excellent strength, and can easily control moisture inside the shoes, thereby improving hygiene.

1 is a photograph of an upper fabric for shoes manufactured according to an embodiment of the present invention.

Prior to a detailed description of the preferred embodiments of the present invention below, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and meanings consistent with the technical spirit of the present invention. and should be interpreted as a concept.

Throughout this specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

Throughout this specification, “%” used to indicate the concentration of a specific substance is (weight/weight)% for solid/solid, (weight/volume)% for solid/liquid, and liquid (weight/volume)%, unless otherwise specified. /liquid means (volume/volume)%.

Hereinafter, look at an embodiment of the present invention. However, the scope of the present invention is not limited to the following preferred embodiments, and those skilled in the art can implement various modified forms of the contents described herein within the scope of the present invention.

The present invention relates to a method for manufacturing a shoe upper using Korean paper.

The upper for shoes manufactured according to the present invention has an eco-friendly advantage because it includes Korean paper. In addition, by using different kinds of yarns together, there is an advantage in that strength or durability degradation that may occur when Korean paper is used alone is prevented, and strength required as an upper for shoes can be satisfied.

First, a method for manufacturing an upper for shoes using Korean paper according to an embodiment of the present invention includes the steps of knitting a yarn containing Korean paper yarn to produce a knitted fabric; It includes; heating the knitted fabric and stretching it in a horizontal direction to correct the size and shape.

The step of producing the knitted fabric is a step of producing a knitted fabric by knitting a yarn containing Korean paper yarn. The knitted fabric manufactured through this step is knitted according to a preset pattern and has a mesh or mesh shape. By having this shape, it is possible to secure structural durability and flexibility, and it is functional as a shoe upper. Ventilation is performed by each air gap forming a mesh, so moisture or polluted air inside the shoe is quickly absorbed by the outside air. It can be exchanged to improve the hygienic performance of the inside of the shoe.

The step of manufacturing a knitted fabric may be a step of manufacturing a knitted fabric by supplying yarn containing Korean paper yarn to a circular knitting machine or a flat knitting machine. At this time, the yarn containing the Korean paper yarn includes Korean paper yarn, polyester yarn, and spandex yarn.

These heterogeneous yarns can be supplied together to a circular knitting machine or flat knitting machine to form a knitted fabric without going through a separate plying step. Since the braiding process is omitted in this way, it is possible to obtain an effect of reducing process steps and thereby improving productivity. In addition, since the heterogeneous yarns are not plied, and a knitted fabric is formed in a form exposed to the outside, there is an advantage in that the functions of each heterogeneous yarn appear evenly.

The yarn forming the knitted fabric includes 44 to 55 wt% of Korean paper yarn, 35 to 49 wt% of polyester yarn, and 5 to 15 wt% of spandex yarn.

The Korean paper yarn is a yarn manufactured using paper mulberry as a raw material, and can form a predetermined strength and is obtained from natural materials. Unlike shoe uppers made only of conventional synthetic fibers, the advantage of being able to impart eco-friendly characteristics to the shoe upper there is In addition, if Korean paper yarn is included in the upper of the shoe, it is easy to control the humidity inside the shoe to improve the hygienic environment inside the shoe, and because it is a natural material, it can reduce skin irritation even when it comes in direct contact with the skin, and it can reduce static electricity There are advantages to being preventive.

The Korean paper yarn may be included in a weight range of 44 to 55 wt%. If it is included in less than 44 wt%, the content of synthetic fibers is relatively increased, reducing eco-friendly characteristics, and it is difficult to obtain the above-mentioned effects. If it exceeds wt%, it is difficult to secure the physical properties of the shoe upper.

The Korean paper yarn may have a fineness of 100 to 300 denier. When having such a fineness, a certain strength can be expressed while partially offsetting the low physical properties inherent in Korean paper yarn. If the fineness of the Korean paper yarn is less than 100 denier, the diameter of the yarn is too small, resulting in a decrease in the strength of the knitted fabric or damage to the yarn. Therefore, it is preferable to have a fineness within the above range.

The polyester yarn is a fiber added to reinforce insufficient strength and durability of Korean paper yarn. Polyester yarn has excellent durability and elasticity, and exhibits the same or very similar strength in a dry state or a wet state, so when applied as a shoe upper, it has the advantage of securing certain durability even in rainy weather.

Since polyester yarn is a synthetic fiber, it is difficult to absorb sweat or discharge moisture, so there is a problem of deteriorating hygiene inside the shoe, but this disadvantage can be supplemented by Korean paper yarn.

The polyester yarn may be included in 35 to 49 wt%, and when included in less than 35 wt%, the strength improvement effect is insignificant, and when it exceeds 49 wt%, the content of Korean paper yarn is relatively low, so shoes Since the eco-friendly characteristics of the upper or the humidity control effect are lowered, it is preferable to be included within the above-described weight range.

The fineness of the polyester yarn is preferably 500 to 800 denier, and since the fineness of the polyester yarn is higher than that of the Korean paper yarn, the strength and durability of the polyester yarn and the humidity control effect of the Korean paper yarn are improved. can be done efficiently. In other words, the fineness of the polyester yarn, which expresses the main durability, is formed to secure the strength of the basic shoe upper, and at the same time, the Korean paper yarn is knitted to realize humidity control and eco-friendly performance by the Korean paper yarn, and at the same time, the low durability of the Korean paper yarn This complementary effect can be obtained. Conversely, when the fineness of the Korean paper yarn is higher than the fineness of the polyester yarn, it is difficult to secure sufficient strength.

In addition, the number of strands of the polyester yarn may be 160 to 220 F, and if the number of strands is less than 160 F, there is a problem in that the tactile feeling is deteriorated, and if it exceeds 220 F, the fastness is lowered and dyeing is difficult. It is preferable to use a polyester yarn of one standard.

The spandex yarn has a very excellent elasticity, and since the shape of the upper of the shoe is flexibly changed according to the shape of the foot of the person wearing the shoe, it can provide a good fit. In addition, it is durable and has excellent sweating and drying properties, which can contribute to improving hygiene inside the shoe.

The spandex yarn may be included in 5 to 15 wt%, and if it is included in less than 5 wt%, the shoes do not change flexibly enough to fit the shape of the foot of the shoe wearer, so there is a problem in that the fit is deteriorated, and the spandex yarn exceeds 15 wt%. In the case of doing so, since the elasticity of the upper of the shoe is excessively large, it does not hold the foot strongly, and there is a problem that the fit is rather deteriorated, so it is preferable to be included within the above-mentioned weight range.

The spandex yarn may have a fineness of 85 to 120 denier, and it is preferable to use a spandex yarn having the above-described fineness range because sufficient strength and elasticity can be secured when having such a fineness range.

As described above, since the knitted fabric knitted with heterogeneous yarns including Korean paper yarns is irregular in shape and size, it can be standardized into a certain size and shape through the tenta step.

Specifically, the knitted fabric is heated and stretched in a horizontal or longitudinal direction so as to maintain the standard of the stretched form. Through this step, the unit weight of the knitted fabric is uniformly formed, and uniform durability, tensile performance, and recovery performance can be secured.

At this time, the heating temperature may be 150 to 180 ° C., and if the heating temperature is lower than the above temperature, the efficiency of the tenta process is low, making it difficult to form a uniform standard. Since there is a problem, it is preferable that the process is performed in the above-described temperature range.

On the other hand, a dyeing step for changing the appearance of the knitted fabric may be performed. After being knitted, that is, when a dyeing process is performed in the knitted fabric state, dimensional change, uniform dyeing due to different dyeing characteristics between heterogeneous yarns, etc. Since problems may occur, it is preferable that the dyeing step is performed in a yarn-dyed manner in the yarn state prior to the knitted fabric manufacturing step.

This yarn dyeing method may use a conventional yarn dyeing method, and for example, yarn dyeing may be performed by immersing the yarn in a dyeing bath containing dye and taking it out and fixing the dye to the yarn through heat treatment or UV treatment. However, it is not limited thereto.

Such yarn dyeing may be made on each of Korean paper yarn, polyester yarn, or spandex yarn, and dyeing treatment may be performed on only one yarn among them.

As described above, in the manufacturing method of uppers for shoes using Korean paper according to an embodiment of the present invention, since the uppers for shoes are manufactured with heterogeneous yarns including Korean paper yarns, eco-friendly characteristics can be imparted to the uppers for shoes, , it is easy to control the humidity inside the shoe, and it has the characteristics of providing sufficient physical strength required as a shoe upper.

The present invention includes a shoe upper manufactured according to the method for manufacturing a shoe upper using Korean paper described above, and such a shoe upper can be applied to various types of shoes to impart eco-friendly characteristics to the shoes.

Hereinafter, specific actions and effects of the present invention will be described through an embodiment of the present invention. However, this is presented as a preferred example of the present invention, and the scope of the present invention is not limited according to the examples.

[Production Example]

First, 200D Korean paper yarn, 300D/96F polyester yarn (PE yarn), 600D/192F polyester yarn, and 105D spandex yarn were prepared, and the polyester yarn was dyed black and undyed, respectively. were prepared individually.

Next, each yarn was circularly knitted alone or together according to the content shown in Table 1 to prepare each knitted fabric, and each knitted fabric was subjected to tenta treatment at a temperature of 170 ° C. to optimize specifications to prepare each fabric sample.

Content ratio (wt%) yarn type comparative example
One comparative example
2 comparative example
3 Example
One Example
2 Example
3 comparative example
4 Han Branch (200D) 100 50 43 45 45 53 57 PE yarn (300D/96F) - 50 - - - - - PE yarn_dyeing (300D/96F) - - 57 - - - - PE yarn (600D/192F) - - - 45 - 38 35 PE yarn_dyeing (600D/192F) - - - - 45 - - Spandex yarn (105D) - - - 10 10 9 8 100 100 100 100 100 100 100

[Experimental Example 1]

By measuring the weight, thickness, tensile strength, elongation, tear strength, mullen burst, and abrasion stoll of each fabric sample prepared in the above preparation example, The results are listed in Table 2.

comparative example
One comparative example
2 comparative example
3 Example
One Example
2 Example
3 comparative example
4 Weight (g/m ² ) 280 273 257 343 333 356 377 Thickness (mm) 1.00 0.96 1.14 1.28 1.30 1.32 1.35 Tensile strength (kg _f /inch) 13.3 30.4 14.1 21.8 34.1 33.0 28.9 Elongation (%) 94 95 77 122 158 110 104 Tear strength (kg _f ) 4.3 7.9 5.7 10.7 10.8 10.2 8.3 Burst strength (kg _f /cm ² ) 8 16 11 21 21 21 17 Sorcery Strength (cycles) 15 20 6 70 60 58 32

Referring to the results of Table 2 above, compared to the case where Korean paper yarn is used alone (Comparative Example 1), when Korean paper yarn and polyester yarn are used together (Comparative Example 2 and Comparative Example 3), which exhibits better strength can confirm that In addition, it can be seen that Examples 1 to 3 and Comparative Example 4, which further included spandex yarns, have better physical property values than Comparative Example 2 or Comparative Example 3.

In particular, referring to Examples 1 to 3 and Comparative Example 4 in which Korean paper yarn, polyester yarn, and spandex yarn were all used, Examples 1 to 3 exhibited similar physical properties, whereas Comparative Example 4 In some cases, a decrease in strength can be observed. From these experimental results, it can be seen that the strength of the fabric is significantly reduced when the amount of Korean paper yarn is excessive.

Therefore, from the results of this experiment, it was confirmed that it is preferable to use all of Korean paper yarn, polyester yarn, and spandex yarn in the shoe upper including Korean paper yarn, especially when the content of Korean paper yarn is 44 to 55 wt% It was confirmed that further improved strength and durability can be secured.

[Experimental Example 2]

Upper fabrics for shoes were manufactured in the same manner as in Example 2, but fabrics (Samples 1 to 5) knitted in different patterns were prepared, and the results are shown in FIG. 1.

The present invention is not limited to the specific embodiments and descriptions described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the present invention claimed in the claims. and such modifications are within the protection scope of the present invention.

Claims (8)

Preparing a knitted fabric by knitting a yarn containing Korean paper yarn;
A method of manufacturing an upper for shoes using Korean paper comprising the step of correcting dimensions and shape by heating and stretching the knitted fabric in a horizontal direction. The method of claim 1, wherein the yarn,
A method for manufacturing an upper for shoes using Korean paper, characterized in that it comprises Korean paper yarn, polyester yarn and spandex yarn. According to claim 2,
Prior to the step of manufacturing the knitted fabric, a dyeing step of dyeing the yarn; characterized in that performed, a method for manufacturing an upper for shoes using Korean paper. According to claim 2,
The method of manufacturing an upper for shoes using Korean paper, characterized in that the Korean paper yarn has a fineness of 100 to 300 denier. According to claim 2,
The method of manufacturing an upper for shoes using Korean paper, characterized in that the polyester yarn has a fineness of 500 to 800 denier. According to claim 2,
The method of manufacturing an upper for shoes using Korean paper, characterized in that the spandex yarn has a fineness of 85 to 120 denier. The method of claim 1, wherein the yarn,
A method for manufacturing an upper for shoes using Korean paper, characterized in that it comprises 44 to 55 wt% of Korean paper yarn, 35 to 49 wt% of polyester yarn, and 5 to 15 wt% of spandex yarn. An upper for shoes containing Korean paper manufactured by the method of any one of claims 1 to 7.

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