KR20220072393A - Upper member of shoes with design and manufacturing method of thereof - Google Patents

Abstract

The present invention relates to a method for manufacturing a shoe upper member having a pattern formed therein, comprising: a first step of preparing an image in which a predetermined shape and pattern are expressed to generate a pattern image; and applying a polyurethane resin to one side of a release paper A second step of forming a coating layer by aging, a third step of printing the pattern image on one surface of the coating layer to form a printed layer and drying, a foaming groove is provided on one surface of the printed layer and a foaming agent is applied to form a foaming layer a fourth step of forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one surface of the printed layer and the foaming layer, separating the protective layer to attach the hot melt adhesive to the fabric, and from the coating layer A sixth step of separating a release paper to obtain a semi-finished product in which the hot melt adhesive, the foaming layer, the printing layer, and the coating layer are sequentially laminated on one surface of the fabric, and a seventh step of cutting the semi-finished product to complete the shoe upper member A method of manufacturing a shoe upper member having a pattern formed therein, comprising:

Description

UPPER MEMBER OF SHOES WITH DESIGN AND MANUFACTURING METHOD OF THEREOF

The present invention relates to a patterned shoe upper member and a method for manufacturing the same, and more particularly, to a shoe upper member having a pattern formed with a double PU coating layer and a foaming layer having excellent durability, three-dimensional effect and resolution, and manufacturing thereof it's about how

For the fabric used for the upper of shoes, it is necessary to form patterns, patterns, designs, etc. to meet customer needs. In the existing production method, a pattern was formed on the fabric by screen printing using a printing film or a printing plate. However, in this method, productivity is lowered due to the complicated process, and the realization of three-dimensional and colorful colors on the fabric is difficult due to the limitation of the printing method. It was difficult to form a monochromatic pattern, so there was a problem of poor aesthetics.

In addition, there was a problem in that it was rather difficult to precisely control the three-dimensional effect only in the desired part in realizing the three-dimensional effect in patterns, patterns, and designs.

Republic of Korea Patent No. 10-2131567

In order to solve the above-mentioned problems, an object of the present invention is to provide a sophisticated three-dimensional effect to a desired part while having rich colors, excellent print quality, and durability.

In order to achieve the above object, the present invention provides a patterned shoe upper member and a method for manufacturing the same, a first step of generating a pattern image by preparing an image in which a preset shape and pattern are expressed, polyurethane on one surface of a release paper A second step of applying a resin and aging to form a coating layer, a third step of printing the pattern image on one surface of the coating layer to form a printed layer and drying, providing foam grooves on one surface of the printed layer and applying a foaming agent to foam A fourth step of forming a layer, a fifth step of forming a hot melt adhesive layer comprising a hot melt adhesive and a protective layer on one surface of the printing layer and the foam layer, detaching the protective layer and attaching the hot melt adhesive to the fabric, and A sixth step of separating the release paper from the coating layer to obtain a semi-finished product in which the hot melt adhesive, the foaming layer, the printing layer, and the coating layer are sequentially laminated on one surface of the fabric, and cutting the semi-finished product to complete the shoe upper member It is characterized in that it includes 7 steps.

The coating layer of the second step is a first coating layer formed to have a thickness of 12 to 18 μm by applying the polyurethane resin to one side of the release paper and aging it at 65 to 75° C. for 20 to 28 hours, the first coating layer It is characterized in that it comprises a second coating layer formed by applying the polyurethane resin to one surface and aging at 65 to 75 ° C. for 20 to 28 hours to have a thickness of 12 to 18 μm.

The foaming agent of the fourth step is characterized in that it is composed of 0.1 to 0.2 parts by weight of thermally expandable microspheres based on 1 part by weight of the polyurethane paste.

In the fourth step, it is characterized in that the thermal expansion temperature is 110 ~ 140 ℃ using thermally expandable microspheres.

The hot-melt adhesive of the fifth step is characterized in that it consists of a polyester-based hot-melt adhesive having a melting temperature of 110 to 140 °C.

The patterned shoe upper member and the method for manufacturing the same according to the present invention have the following effects.

It has rich colors, excellent print quality, and durability, and at the same time has the advantage of being able to give a sophisticated three-dimensional effect to the desired part.

1 is a flowchart of a method of manufacturing a shoe upper member having a pattern formed therein according to the present invention.
2 is a cross-sectional view of a patterned shoe upper member manufactured by the method for manufacturing a patterned shoe upper member according to the present invention, to which a protective layer and a release paper are attached before the fabric is attached.
3 is a cross-sectional view of a patterned shoe upper member manufactured by the method of manufacturing a patterned shoe upper member according to the present invention before the protective layer is removed before attaching the fabric.
4 is a cross-sectional view illustrating a fabric attachment of a patterned shoe upper member manufactured by the method of manufacturing a patterned shoe upper member according to the present invention.

Hereinafter, preferred embodiments of a shoe upper member having a pattern formed therein and a method for manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

First, in the method of manufacturing a shoe upper member with a pattern formed according to the present invention, a first step (S10) of generating a pattern image by preparing an image in which a preset shape and pattern are expressed is performed.

Specifically, the preset shape and pattern expressed in the image represents a shape or pattern to be given to shoes, and a pattern image is generated through the image in which the preset shape and pattern are expressed.

To generate the pattern image, the image is continuously repeated to have a size equal to or smaller than the size of the release paper 100, but the continuous images form one layout. In generating the pattern image, at least one of a brightness value, a contrast value, a contrast value, a saturation value, and a color value of the pattern image according to the shoe upper member is corrected according to a user input, and according to the corrected value You can create pattern images.

Meanwhile, in generating the pattern image, the pattern image may be generated by continuously repeating a plurality of images by allowing a tolerance of a predetermined length between the images. Preferably, the length of the tolerance is smaller than the smaller of the horizontal length and the vertical length of the image.

Here, if a plurality of the images are arranged in one layer to form a pattern image, it may be easy to make a plurality of shoe upper members using one image.

Accordingly, the method of manufacturing the patterned shoe upper member according to an embodiment of the present invention has an advantage in that manufacturing efficiency and yield can be increased in manufacturing the patterned shoe upper member.

Next, a second step (S20) of applying a polyurethane resin to one surface of the release paper 100 and aging to form the coating layer 200 is performed.

Here, the release paper 100 may have a thickness of 100 to 120 μm, and may be made of a polyethylene terephthalate material.

When the thickness of the release paper 100 is less than 100 μm, when a pattern image is printed on the print layer 300 to be described below, wrinkles occur in the release paper 100, so that it is difficult to form the print layer 300 There may be, and when the thickness of the release paper 100 exceeds 120 μm, when a pattern image is printed on the print layer 300 to be described below, the release paper 100 is thick and lacks flexibility, so it is easy to deform the printed layer There may be difficulties in forming 300 .

In addition, when the release paper 100 is coated with a polyurethane resin, the polyurethane particles, which are components of the pigment used to form the printing layer 300, which will be described below, interact with the polyurethane particles of the coating layer 200, so that the The adhesion between the coating layer 200 and the printing layer 300 is improved. Therefore, in the sixth step (S60) to be described below, when the hot melt adhesive 520, the foaming layer 400, the printing layer 300, and the coating layer 200 are sequentially laminated on one surface of the fabric 600, the coating layer 200 does not peel from the printed layer 300 and protects the printed layer 300 , thereby improving durability of the shoe upper member.

In addition, in the second step (S20), a polyurethane resin is applied to one surface of the release paper 100 and aged at 65 to 75° C. for 20 to 28 hours, and the first coating layer 210 having a thickness of 12 to 18 μm. ) in step 2-1 (S21) of forming a second coating layer 210 with a polyurethane resin on one surface, and aging at 65 to 75° C. for 20 to 28 hours to have a thickness of 12 to 18 μm. It can be divided into a 2-2 step (S22) of forming the coating layer 220.

Here, if the aging temperature is less than 65 ℃ aging may take a long time to decrease productivity, and if it exceeds 75 ℃, the release paper 100 or the polyurethane resin may be deformed. In addition, if the aging time is less than 20 hours, the aging may not be sufficient, and if it exceeds 28 hours, further aging is meaningless, and the aging time may be long, resulting in decreased productivity.

In addition, when the coating layer 200 is formed to be 24-36 μm at a time, the coating layer 200 may not effectively protect the printed layer 300 because a poorly coated portion may be formed. The coating layer 210 and the second coating layer 220 are divided and applied. In addition, through coating by applying a polyurethane resin to one surface of the first coating layer 210 in step 2-2 (S22), one surface of the first coating layer 210 is further coated once more and the coating is performed Coating can be applied to incomplete areas.

If the thickness of the coating layer 200 composed of the first coating layer 210 and the second coating layer 220 is less than 24 μm, the strength of the coating layer 200 is weak, and the printed layer 300 cannot be effectively protected, so that shoes The durability of the upper member may be reduced, and when the thickness of the coating layer 200 including the first coating layer 210 and the second coating layer 220 exceeds 36 μm, the flexibility of the coating layer 200 decreases and the shoe upper member When applied to one surface of a curved shoe, there may be difficulties such as deformation of the shoe upper member and wrinkling.

Next, a third step (S30) of printing the pattern image on one surface of the coating layer 200 to form the printed layer 300 and drying is performed.

Here, the pattern image is smaller in size than the release paper 100 prepared in the first step (S10), and is a repeating arrangement of images in which preset shapes and patterns are expressed.

In this case, a method of printing a pattern image using a pigment on one surface of the coating layer 200 may be a pigment spraying method using a digital printer. The pigment injection method using a digital printer has excellent color expression with rich colors, and the print quality is also fine and sophisticated, and it has the advantage of being able to print high-resolution images. Accordingly, if the pigment injection method using a digital printer is used in the third step (S30) of the patterned shoe upper member according to the present invention, the pigment used may include a polyurethane component.

In the third step (S30), a pigment may be printed on one surface of the coating layer 200 at a printing layer 300 formation rate of 10 to 20 m ² /h.

If the printing layer 300 forming rate is less than 10 m ² /h, the rate of forming the printed layer 300 on one surface of the coating layer 200 is too slow, so productivity may decrease, and the printing layer 300 forming speed When is greater than 20m ² /h, the speed is high, and an insufficiently printed part may be generated on one surface of the coating layer 200 or the print quality may be deteriorated.

In addition, in the third step (S30), drying the formed printed layer is a 3-1 step ( S31) and a 3-2 step (S32) of heating and drying the printed layer 300 by applying heat and hot air at 70 to 80° C. for 55 to 65 seconds.

If the heating temperature is less than 55 ℃ in the 3-1 step (S31), the heating time may be prolonged and productivity may be decreased. Deformation such as cracking of the printed layer 300 may occur, and if the heating time is less than 55 seconds in step 3-1 (S31), the heating time is short and the printed layer 300 may not be sufficiently dried, If the heating time exceeds 65 seconds in step 3-1 ( S31 ), the heating time is long and productivity may decrease.

In addition, if the heating temperature is lower than 70°C in the 3-2 step (S32), the heating time may be prolonged and productivity may decrease, and if the heating temperature exceeds 80°C in the 3-2 step (S32), the printed layer (300) and the coating layer 200 may be damaged, and if the heating time is less than 55 seconds in the 3-2 step (S32), the heating time is short, and the printed layer 300 may not be sufficiently dried. , if the heating time exceeds 65 seconds in the 3-2 step (S32), the heating time may be prolonged and productivity may decrease.

Next, a fourth step (S40) of providing a foaming groove on one surface of the printing layer 300 and applying a foaming agent to form the foaming layer 400 is performed.

Here, if the foam layer 400 is first provided on one surface of the coating layer 200 before the formation of the print layer 300 , the shape or pattern of the print layer 300 is defective by the foam layer 400 . Since this may occur, the foam layer 400 is preferably formed on one surface of the printing layer 300 .

The foamed groove provided on one surface of the printing layer 300 may be produced through a press machine, etc., and among the preset shapes or patterns, a groove of a desired shape is manufactured in a desired portion of the predetermined shape or pattern to cause the foaming to occur precisely. can After the foaming agent is applied to the foaming groove, the foaming agent attached to the surrounding area is wiped off. The purpose of wiping off the foaming agent is to precisely control the foaming by wiping off the foaming agent that may have been deposited on one surface of the printing layer 300 in the process of applying the foaming agent to the foaming grooves.

Here, the foaming agent is composed of 0.1 to 0.2 parts by weight of thermally expandable microspheres with respect to 1 part by weight of polyurethane paste, and it is characterized by using thermally expandable microspheres having a thermal expansion temperature of 110 to 140°C.

Preferred thermally expandable microspheres described herein are commercially available. These microspheres are generally dry unexpanded or partially unexpanded microspheres composed of small spherical particles with an average diameter of typically 10-15 microns. These spheres are formed from a gas-impermeable polymer shell (eg, made of acrylonitrile or PVDC) and encapsulate minute drops of (cyclo)aliphatic hydrocarbons, such as liquid isobutane. When these microspheres are heated at an elevated temperature level (e.g., 100-200° C.) sufficient to soften the thermoplastic shell and volatilize the encapsulated (cyclo)aliphatic hydrocarbons, the resulting gas expands the shell and causes the microspheres to expand. increase the volume. When expanded, the microspheres have a diameter of 3.5 to 4 times their original diameter, so that the expanded volume is about 50 to 60 times larger than the initial volume in the unexpanded state. An example of this microsphere is the EXPANCEL-DU microsphere marketed by AKZO Nobel Industries of Sweden ('EXPANCEL' is a trademark of AKZO Nobel Industries).

The reason for using thermally expandable microspheres as a physical foaming agent in the present invention is to proceed with sophisticated foaming. A chemical foaming agent is chemically decomposed by heat, and pores are formed in the resin by a gaseous substance among the decomposed substances, so it may be difficult to elaborate work. However, the physical foaming agent is not foaming due to chemical decomposition or structural change, but is useful in working conditions that are difficult to use because it forms pores through physical phase change and volume change. Therefore, in the present technology, since the focus is on allowing the foaming to proceed only in the desired portion, a groove is formed in the printed layer and EXPANCEL DU (Akzo novel), a type of thermally expandable microsphere, which is a physical foaming agent, is used. In addition, since it is difficult to precisely advance the foaming to a desired part using thermally expandable microspheres without forming a groove, a foaming agent is applied to the groove by forming a groove.

Here, the foaming agent is characterized in that it consists of 0.1 to 0.2 parts by weight of thermally expandable microspheres with respect to 1 part by weight of the polyurethane paste, wherein the thermally expandable microspheres are less than 0.1 parts by weight with respect to 1 part by weight of the polyurethane paste. If included, foaming may not proceed sufficiently because foaming may not proceed to a desired shape, and if thermally expandable microspheres are included in excess of 0.2 parts by weight with respect to 1 part by weight of the polyurethane paste, foaming may occur excessively and the final Defects such as slip may appear in the pattern of the product.

In addition, since it is characterized in that the thermal expansion temperature of the foaming agent is 110 to 140 ° C., in more detail, EXPANCE DU-40 (Akzo novel company) that satisfies the expansion temperature of 110 to 140 ° C. . The reason for using a foaming agent having a thermal expansion temperature of 110 to 140 ° C is that the melting temperature of the hot melt adhesive 520 to be described below is 110 to 140 ° C. This is to cause the foam layer 400 to expand together when heat is applied to adhere to the fabric 600 .

Specifically, in a sixth step (S60) to be described below, the hot melt adhesive 520, the foaming layer 400, the printing layer 300, and the coating layer 200 are laminated on one surface of the fabric 600, and , in the process of applying a temperature so that the hot melt adhesive 520 is completely attached to the fabric 600, the temperature is formed to be 110 ~ 140 ℃, if the temperature is less than 110 ℃, the hot melt adhesive 520 ) is not completely melted, so that it is not completely attached to the fabric 600, and thus a defect may occur, and accordingly, the foaming agent may not be sufficiently expanded. In addition, if the temperature exceeds 140 ℃, the temperature is too high to cause damage to the fabric 600 , the printing layer 300 , and the coating layer 200 .

Next, a fifth step (S50) of forming a hot melt adhesive layer 500 comprising a hot melt adhesive 520 and a protective layer 510 on one surface of the printed layer 300 and the foam layer 400 is performed.

The hot melt adhesive layer 500 may include a protective layer 510 and a hot melt adhesive 520 , and as shown in FIG. 2 , a hot melt adhesive 520 on one surface of the printed layer 300 and the foam layer 400 . , the protective layer 510 may be stacked in that order.

The protective layer 510 may serve to prevent the hot melt adhesive 520 from being contaminated by dust, foreign matter, or the like. The protective layer 510 may be formed on one surface of the hot-melt adhesive 520 and adhered to the hot-melt adhesive 520 in a non-adhesive manner so that it can be removed without leaving a foreign substance on the hot-melt adhesive 520 .

The hot-melt adhesive layer 500 may be a layer made of a hot-melt adhesive 520 that has adhesiveness when melted and does not exhibit adhesiveness at room temperature. The hot-melt adhesive 520 may be used to adhere the shoe upper member to the shoe upper when the shoe upper member is applied to the shoe upper, and the hot-melt adhesive 520 may be a layer made of a hot-melt adhesive made of a polymer resin. . More preferably, the hot melt adhesive 520 may be made of any one or more selected from ethylene-vinyl acetate-based, polyolefin-based, styrene block copolymer-based, polyamide-based, polyester-based, and urethane-based adhesives.

In addition, the hot-melt adhesive 520 may be made of a polyester-based hot-melt adhesive having a melting temperature of 110 to 140 °C. The hot melt adhesive 520 may cause damage to the coating layer 200 , the printing layer 300 , and the fabric 600 when the melting temperature is 110° C. or less, but is not limited to, but exceeding 140° C.

In addition, the hot melt adhesive 520 may have a thickness of 100 ~ 150㎛. If the thickness of the hot melt adhesive 520 is less than 100 μm, the adhesive strength may decrease due to the thin thickness of the hot melt adhesive 520 when the shoe upper member is attached to the shoe upper. If the thickness exceeds 150 μm, the adhesive strength is sufficient The above increase in thickness is meaningless and the amount of the hot-melt adhesive 520 used may increase the unit price of the manufactured shoe upper member.

When the hot melt adhesive 520 is used, the shoe upper member can be simply applied to the shoe upper by attaching the hot melt adhesive 520 to the fabric 600, so a complicated sewing process is not required. can be simplified, and since a sewing line is not formed on one surface of the shoe upper member due to the sewing process, the aesthetics of the shoe upper member and the shoe upper can be improved.

Next, by separating the protective layer 510 and attaching the hot melt adhesive 520 to the fabric 600 , and separating the release paper 100 from the coating layer 200 , on one surface of the fabric 600 . A sixth step (S60) of obtaining a semi-finished product in which the hot melt adhesive 520, the foaming layer 400, the printing layer 300, and the coating layer 200 are sequentially laminated is performed.

Specifically, as shown in FIG. 3 , the protective layer 510 is separated from the hot melt adhesive layer 500 . By separating the protective layer 510 , the hot melt adhesive 520 protected from dust or foreign substances is attached to the fabric 600 .

In addition, in the sixth step (S60), the hot melt adhesive 520 is attached to one surface of the fabric 600 and the printed layer 300 is transferred to the fabric 600 at 65 to 75° C. It may include a step of aging for a period of time.

At this time, if the aging temperature is less than 65 ℃, the aging time may be long and productivity may decrease. If the aging temperature exceeds 75 ℃, damage may occur to the fabric 600, and if the aging time is less than 20 hours, the time is short. Aging may not be sufficiently performed. In addition, if the aging time exceeds 28 hours, it may be difficult to expect any further aging effect because the aging is completely completed.

In addition, the sixth step (S60) may include a step of applying heat of 110 ~ 140 ℃ so that the hot melt adhesive 520 is completely attached to one surface of the fabric 600.

When the temperature is less than 110° C., the hot melt adhesive 520 may not adhere to the fabric 600 , and foaming may not occur properly even in the foam layer 400 . In addition, when the temperature exceeds 140 ℃, it may cause damage to the coating layer 200 , the printing layer 300 , and the fabric 600 .

And, when the release paper 100 is separated from the coating layer 200, the coating layer 200, the printing layer 300, the foaming layer 400, and the hot melt adhesive laminated on one surface of the release paper 100 ( 520) is separated from one side of the release paper 100, and as shown in FIG. 4, the hot melt adhesive 520, the foaming layer 400, the printing layer 300, the coating layer ( 200) are stacked in that order.

The fabric 600 may be any one or more selected from synthetic fibers made of polyurethane and synthetic leather. If the fabric 600 is a polyurethane material, the hot melt adhesive layer 500, the foam layer 400, the print layer 300, and the coating layer 200 may all be made of polyurethane, and present in each layer. The interaction between the polyurethane molecules can be improved.

Accordingly, the patterned shoe upper member manufactured by the method for manufacturing a patterned shoe upper member according to an embodiment of the present invention includes the fabric 600 , the hot melt adhesive 520 , the foam layer 400 , and the The hot melt adhesive 520 , the foam layer 400 , the printed layer 300 , and the coating layer 200 are peeled off from the fabric 600 because of good adhesion between the printed layer 300 and the coating layer 200 . There is an advantage that the durability of the shoe upper member may be improved.

Next, a seventh step (S70) of cutting the semi-finished product to complete the shoe upper member is performed.

The semi-finished product is cut by using a cutting frame having a plurality of through-holes corresponding to the shapes of the plurality of images formed on the printing layer 300 to complete the shoe upper member.

The seventh step (S70) is a step of preparing a cutting frame having a plurality of through holes corresponding to the shapes and sizes of a plurality of images arranged in succession and repetition so as to have a tolerance of a predetermined length prepared in the first step (S10). And, it may include the steps of seating the cutting frame to expose a plurality of images that are continuously and repeatedly arranged on the top of the semi-finished product, and separating the semi-finished product to correspond to the plurality of images by pressing the cutting frame in the direction of the semi-finished product.

Next, the characteristics of a shoe upper member having a pattern formed by the present invention and a shoe to which the member is attached through an experiment will be described below.

First, the degree of foaming and the state of the final product were expressed as ◎ / ○ / × by comparing the example manufactured by the present invention method for manufacturing the patterned shoe upper member and the example manufactured by the conventional method.

More specifically, the degree of foaming is indicated by ◎ when the desired shape and degree of foaming has been very precisely expanded to the desired part, ○ if the desired shape and degree are matched to the desired part, and × if not, the state of the final product is If no slip occurs on the pattern of the shoe to which the shoe upper member is attached and the shoe member is completely adhered to the shoe ◎, if no slip occurs on the pattern of the shoe and the shoe member adheres well to the shoe ○, Defects such as slipping on the pattern or the shoe member was not properly adhered to the shoe is indicated by ×.

(a) Experiments according to the type of foaming agent

[Example 1]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, and on one side of the coating layer, the pattern image is printed to form a printing layer and dried, and on one side of the printing layer, such as urethane or nylon By mixing a certain amount of the solvent used for ink with the resin, dilute the foam capsule to within 20% of the diluted solution, and apply a foaming layer to have a thickness of 15-25㎛ and a density of 70±6kg/m ² , After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one surface of the foam layer, the protective layer is separated to attach the hot melt adhesive to the fabric, and the printing layer is aged to be transferred to the fabric, and the hot melt adhesive is After applying heat at 125° C. so that it is completely attached to the fabric, the release paper is separated from the coating layer to obtain a semi-finished product in which the hot melt adhesive, the foaming layer, the printing layer, and the coating layer are completely attached to one side of the fabric, The semi-finished product was cut to complete the shoe upper member.

[Example 2]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 3]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, and the pattern image is printed on one side of the coating layer to form a printing layer and dried, and a liquid foamed polyurethane resin on one side of the printing layer. A foam layer having a density of 70 ± 6 kg/m ² is applied to a thickness of 15-25 μm using a to attach the hot melt adhesive to the fabric, the printing layer is aged to be transferred to the fabric, heat of 125° C. is applied so that the hot melt adhesive is completely attached to the fabric, and the release paper is separated from the coating layer to separate the fabric To obtain a semi-finished product to which the hot melt adhesive, the foaming layer, the printed layer, and the coating layer are completely attached to one surface of the , the semi-finished product is cut to complete the shoe upper member.

division Example 1 Example 2 Example 3 degree of foaming × ◎ × final product ◎ ◎ ◎

As shown in Table 1, Examples 1, 2, and 3 did not cause defects such as slip in the final product, but only Example 2 obtained a good score in the degree of foaming to check whether only the desired part was foamed. This is, as in Example 1, a method of using a foaming capsule, which is a physical foaming agent, mixed with a resin and applying it on one side of the printed layer, and a method of using a chemical foaming agent as in Example 3, the final product is good, but only the desired part is elaborated This means that it is difficult to fire. Therefore, in order to precisely control the foaming of only the desired part of the shape or pattern, a groove is made in the desired model in the printed layer, and thermally expandable microspheres in the groove are thermally expandable with respect to 1 part by weight of polyurethane paste (In this technology, Akzo Novel's Expancel DU -40) shows the result that it is appropriate to apply a foaming agent composed of 0.15 parts by weight.

(b) Experiment according to the amount of blowing agent

[Example 4]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.05 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 5]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.10 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 6]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 7]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.20 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 8]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.25 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

division Example 4 Example 5 Example 6 Example 7 Example 8 Polyurethane
paste
Thermally expandable for 1 part by weight
content of microspheres 0.05 parts by weight 0.10 parts by weight 0.15 parts by weight 0.20 parts by weight 0.25 parts by weight degree of foaming × ○ ◎ ○ × final product ○ ○ ◎ ○ ×

As shown in Table 2, it can be seen that the results of Example 5, Example 6, and Example 7 are good. This is considered to be due to the difference in the content of thermally expandable microspheres included in the polyurethane paste.

First, in the case of Example 4, the content of thermally expandable microspheres contained in the polyurethane paste is small, and it is determined that it has not been sufficiently foamed. is judged In the case of Example 8, since the content of thermally expandable microspheres contained in the polyurethane paste is high, the foaming proceeds somewhat more, and it can be determined that the foaming progresses excessively than the desired foaming degree, resulting in a defect in the foaming degree. It is judged that defects, such as slip, have occurred in the printed layer.

Accordingly, the foaming agent, as in Examples 5, 6, and 7, contains 0.1 to 0.2 parts by weight of thermally expandable microspheres (Expancel DU-40 manufactured by Akzo Novel in the present technology) with respect to 1 part by weight of the polyurethane paste. It is preferable to configure

(c) Experiment according to temperature

[Example 9]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 95° C. so as to be completely attached to the It was cut to complete the shoe upper member.

[Example 10]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 110° C. so as to be completely attached to the It was cut to complete the shoe upper member.

[Example 11]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 125° C. so that it is completely attached to the It was cut to complete the shoe upper member.

[Example 12]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 140° C. so that it is completely attached to the The shoe upper member was cut to complete.

[Example 13]

After forming the pattern image, a double polyurethane coating layer is formed on one side of the release paper, the pattern image is printed on one side of the coating layer, a printing layer is formed and dried, and a foamed groove is provided on one side of the printing layer. to apply a foaming agent composed of 0.15 parts by weight of Expancel DU-40 (Akzo Novel) to 1 part by weight of polyurethane paste to the foam groove, wipe off the foaming agent attached to the foam groove, and then the printed layer and the foam layer After forming a hot melt adhesive layer consisting of a hot melt adhesive and a protective layer on one side of the After applying heat at 155° C. so that it adheres completely to the The shoe upper member was cut to complete.

division Example 9 Example 10 Example 11 Example 12 Example 13 temperature 95℃ 110℃ 125℃ 140℃ 155℃ degree of foaming × ○ ◎ ○ ○ final product × ○ ◎ ○ ×

As shown in Table 3, both the foaming degree and the final product of Example 10, Example 11, and Example 12 had good results, but Example 9 was defective in both the foaming degree and the final product, and Example 13 was defective in the final product. can be confirmed that

In Example 9, due to the process of adhering the hot melt adhesive to the fabric at a low temperature, the foaming of the foaming agent was small, and the foaming did not proceed properly, which was a defect, and the hot melt adhesive was also not sufficiently melted and was unstablely attached to the fabric. Therefore, it can be judged that the final product is also defective.

In addition, in Example 13, due to the process of bonding the hot melt adhesive to the fabric at a high temperature, the foaming agent sufficiently foamed, but due to the high temperature, damage to the coating layer, the printing layer, the fabric, etc. occurred. can

Therefore, the process of adhering the hot melt adhesive to the fabric should be performed at a temperature of 110 to 140° C. as in Examples 10, 11, and 12, and accordingly, the type of foaming agent also has an expansion temperature of 110 to 140° C. It is appropriate to use the

As such, those skilled in the art to which the present invention pertains will understand that the above-described technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention.

Therefore, the embodiments described above are to be understood as illustrative and not static in all respects, and the scope of the present invention is indicated by the following claims rather than the above detailed description, and the meaning and scope of the claims and their All changes or modifications derived from the concept of equivalents should be construed as being included above the present invention.

100: release paper 200: coating layer
210: first coating layer 220: second coating layer
300: printed layer 400: foamed layer
500: hot melt adhesive layer 510: protective layer
520: hot melt adhesive 600: fabric
S10: Step of creating a pattern image
S20: coating layer forming step
S21: first coating layer forming step
S22: second coating layer forming step
S30: Print layer formation and drying step
S31: first drying step
S32: second drying step
S40: Foam groove manufacturing and foam layer formation step
S50: Hot melt adhesive layer attaching step
S60: Fabric attaching step
S70: Step of completing the shoe upper member

Claims (5)

A first step of generating a pattern image by preparing an image in which a preset shape and pattern are expressed;
A second step of forming a coating layer by applying a polyurethane resin to one side of the release paper and aging;
a third step of printing the pattern image on one surface of the coating layer to form a printed layer and drying;
a fourth step of forming a foaming layer by providing a foaming groove on one surface of the printed layer and applying a foaming agent;
a fifth step of forming a hot melt adhesive layer comprising a hot melt adhesive and a protective layer on one surface of the printed layer and the foam layer;
Separating the protective layer, attaching the hot melt adhesive to the fabric, and separating the release paper from the coating layer to obtain a semi-finished product in which the hot melt adhesive, the foaming layer, the printing layer, and the coating layer are sequentially laminated on one side of the fabric Step 6; and
and a seventh step of cutting the semi-finished product to complete the shoe upper member. The method of claim 1,
The coating layer of the second step,
a first coating layer formed by applying the polyurethane resin to one surface of the release paper and aging it at 65 to 75° C. for 20 to 28 hours to have a thickness of 12 to 18 μm; and
Shoes comprising a; a second coating layer having a thickness of 12-18 μm by applying the polyurethane resin to one surface of the first coating layer and aging it at 65 to 75° C. for 20 to 28 hours A method of manufacturing an upper member. The method of claim 1,
The foaming agent of the fourth step,
A method of manufacturing a patterned shoe upper member, comprising 0.1 to 0.2 parts by weight of thermally expandable microspheres based on 1 part by weight of polyurethane paste. The method of claim 1,
In the fourth step,
The method of manufacturing a patterned shoe upper member, characterized in that using the thermal expansion temperature of the thermally expandable microspheres is 110 ~ 140 ℃. The method of claim 1,
The hot melt adhesive of the fifth step,
A method of manufacturing a patterned shoe upper member, comprising a polyester-based hot melt adhesive having a melting temperature of 110 to 140 °C.

Images