KR101407039B1 - Shoe uppers layered with cork sheet - Google Patents

Abstract

The present invention relates to leather uppers for shoes in which cork fabric layer is layered, formed by forming a hot melt bonding layer and a fabric layer and bonding the same on both sides of a cork fabric layer. The fabric layer is formed on the outer side of the leather uppers for shoes and on the inner side of the leather uppers for shoes which are directly attached to top of the foot or the side of the foot to protect the cork fabric layer. Therefore, the present invention can be applied to the leather uppers for shoes with a structure capable of protecting the cork fabric layer. The shoes manufactured by the leather uppers have excellent breathability and antibacterial activity, thereby preventing smell like foot odor. Also, the shoes have excellent wearability by having an excellent shock absorbent property and make a wearer hardly feel tired. The fabric layer is bonded to the cork fabric layer using a mesh hot melt boding layer to prevent the breathability of the cork fabric layer from being disturbed. Therefore, the leather uppers for shoes maintain excellent breathability.

Description

[0001] The present invention relates to a shoe uppers layered with a cork sheet,

The present invention relates to a shoe upper which is laminated with a cork monolayer, and more particularly to a shoe upper which is formed by adhering a mesh-type hot-melt adhesive layer and a textile monolayer on both sides of a cork monolayer, The present invention relates to a shoe upper which is made by laminating a single cork layer, characterized in that the shoe manufactured by the shoe is excellent in air permeability and antibacterial property so that it does not give off odor and is excellent in shock absorbability and excellent in wearing comfort.

Generally, cork is a collection of independent cells divided into thin cell membranes. These independent cell bodies contain air and are very light and elastic. They are excellent in stretchability and antibacterial properties, and have low thermal conductivity, Wallpaper, shoe window, and so on.

As described in Patent Documents 1 and 2 and the like, there have been known techniques for applying cork having the above-mentioned characteristics to shoe, such as a sole prepared by mixing cork powder with synthetic resin, (A), a micro-machined adhesive layer (b) and a cork layer (c) are bonded to each other as shown in Fig. 1 A functional fabric containing a cork, which is used as a fabric of a laminated structure, and which is used for an insole, a wallpaper, a flooring, or the like, is known. In addition, as in Patent Document 5, Unlike the fabric having the structure in which the adhesive layer (b) and the cork layer (c) are laminated, as shown in Fig. 2 in Patent Document 6, the sheet 2 made by pressing the cork , And silicone (4) is added to the cork (3). However, as described above, the techniques of applying cork to shoes are limited to the insole or the middle of the shoe There was a problem that could not be done.

The application technique of cork having excellent air permeability, antimicrobial property and shock absorbing property as described above can be applied to the synthetic resin powders by the fixed idea and used as the sole of the sole, or even if a separate cork layer is formed, A laminate having a layer, an adhesive layer and a single layer structure was applied only to a sole. Even if a laminate having a structure of a cork layer, an adhesive layer and a single layer is applied to a shoe upper, a protective layer for protecting the outer surface of the cork layer is not formed. Therefore, when the shoe is ignited, There is a possibility that the cork layer is separated from the original layer and disassembled due to sweat emitted from the foot, etc. after a certain period of time has elapsed due to the contact of the cork layer.

Patent Document 1: Korean Patent Laid-Open Publication No. 10-1996-0003626 " Patent Document 2: Korean Patent Laid-Open Publication No. 10-2001-0045520 " Patent Document 3: Korean Registered Utility Model No. 20-0109265 "Shoe Insole" Patent Document 4: Korean Registered Utility Model No. 20-0197548 "Shoe midsole structure" Patent Document 5: Korean Patent Registration No. 10-0341277 "Functional Fabric Containing Cork and Method for Producing the Same" Patent Document 6: Korean Patent Laid-Open No. 10-2006-0097249 entitled "Cork Fabric Manufacturing Method and Cutting Belt"

Accordingly, the present invention is a shoe upper which has a structure in which a mesh-type hot-melt adhesive layer and a fabric monolayer are formed on both sides of a cork originated layer and adhered thereto. The shoe upper is not only an outer surface of a shoe upper but also shoes The upper layer of the fabric for protecting the cork layer can be formed on the inner surface of the upper so that the cork layer can be protected. The upper layer of the cork is applied to the upper part of the shoe sole. The present invention provides

In addition, the present invention can be applied to an upper of a shoe by taking advantage of the characteristics of a cork, Another object of the present invention is to provide a shoe upper which is laminated with a cork raw monolayer, characterized in that it has excellent air permeability and antibacterial property so that no odor is generated, shock absorbability is good, and the feeling of comfort is excellent and fatigue is relieved.

The present invention also relates to a method of bonding a fabric monolayer to a cork monolayer using a net-like hot-melt adhesive layer so that the air permeability of the cork monolayer is not disturbed, Another object of the present invention is to provide a shoe upper which is laminated with a single layer.

According to an aspect of the present invention, there is provided a shoe upper,

Wherein a hot-melt adhesive layer and a fabric monolayer are formed on both sides of the cork monolayer, and adhered to each other.

In the present invention, the cork fabric used in the cork raw monolayer is prepared by mixing 85 to 90% by weight of pulverized cork powder and 10 to 15% by weight of an adhesive,

The hot-melt adhesive layer is formed using a mesh-type hot-melt adhesive,

As the natural fabrics, it is preferable to use one of cotton, hemp, wool, and synthetic fabrics to be used for the fabric monolayer.

According to the present invention, it is possible to protect the cork material layer by forming a fabric monolayer for protecting the cork monolayer not only on the outer surface of the shoe upper but also on the inner surface of the shoe upper directly contacting the foot or the side surface of the foot The shoes made by this upper have excellent ventilation and antimicrobial properties so that they do not have foot odor and have excellent impact absorbability and have the effect of relieving fatigue. , It is advantageous that the upper part of the fabric is adhered to the cork single layer by using a mesh-type hot-melt adhesive layer in order to prevent the air permeability of the cork originated single layer from being disturbed, thereby allowing the upper part of the shoe upper to maintain excellent ventilation.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a conventional functional fabric containing cork,
2 is a cross-sectional view of a conventional cork fabric,
3 is a cross-sectional view of a shoe upper which is laminated with cork layers according to the present invention,
Fig. 4 is a plan view of the hot-melt adhesive used in Fig. 3,
FIG. 5 is a cross-sectional view of a shoe upper according to the present invention applied to a shoe.

2 to 5, which show a preferred embodiment of the present invention, and the description and the operation of the construction and operation which can be easily understood by those skilled in the art of manufacturing the shoe upper, Or omitted.

FIG. 3 is a cross-sectional view of a shoe upper which is laminated with cork layers according to the present invention. FIG. 4 is a plan view of the hot-melt adhesive used in FIG. Sectional view of a shoe upper applied to a shoe according to an embodiment of the present invention.

As shown in FIG. 3, in the shoe upper, in which the cork monolayer is laminated according to the present invention,

A hot-melt adhesive layer 20 and a fabric monolayer 30 are formed on both sides of the cork monolayer 10 and adhered to each other.

In the present invention, the term 'cork fabric' refers to a product obtained by mixing 85 to 90% by weight of pulverized cork powder and 10 to 15% by weight of an adhesive, followed by pressing to form a sheet.

The cork powder is an aggregate of independent cells, and the independent cell body contains air. Particularly, since cork powder has antimicrobial properties, it does not give off odor when applied to a shoe upper, and has excellent shock absorbability, The adhesive acts to adhere the cork powders to each other to form a sheet into a fabric shape. And the cause of foot odor is the decomposition of sweat, keratin and organic substances secreted from our feet by bacteria, which causes isovaleric acid, ammonia, and hydrogen sulfide. Such cork powder has excellent antibacterial properties, The antibacterial property is provided by inhibiting the growth of the induced bacteria, and at the same time, the foot odor due to the wearing of the shoes is prevented by the ventilation property of the manufactured cork fabric.

If the amount of the cork powder used is less than 85 wt% or the amount of the adhesive used is more than 15 wt%, the cork powder is insufficiently distributed and unevenly distributed as compared with the adhesive. Thus, When the amount of cork powder used is more than 90% by weight or the amount of the adhesive is less than 10% by weight, fine pores are formed smoothly between the cork powder particles, but the amount of the adhesive So that the bonding force between the cork powders falls off, so that the sheet is not formed.

The size of the cork powder particles is not particularly limited, but is preferably about 0.5 to 3 mm.

The sheeted cork fabric has micro-pores formed between the cork powder particles, thereby exhibiting antimicrobial properties while imparting ventilation. Thus, when applied to an upper of a shoe, it does not produce a foot odor and is excellent in shock absorbability, It plays a role.

The thickness of the cork material layer 10 is not particularly limited, and the thickness of the cork material layer 10 can be appropriately adjusted depending on the purpose of use of the shoe.

In the present invention, the hot-melt adhesive layer 20 is preferably formed using a mesh-type hot-melt adhesive. 4, a space is formed between the dot 22 and the dot 22. By using such a hot melt adhesive, the cork material layer 10 and the fabric material layer Hot melt adhesive is adhered to the space between the dot 22 and the dot 22 by adhesion of the dot 22 of the net type hot melt adhesive by the heat applied during the press molding by roll processing, The air can be permeated so much that the air permeability is excellent and the air permeability of the cork artificial layer 10 can be maintained without interfering with the air permeability.

The hot-melt adhesive used for the hot-melt adhesive layer 20 may be selected from a styrenic thermoplastic elastomer, ethylene-vinyl acetate, ethylene acrylic copolymer, olefin, polyester, polyamide or polyurethane .

In the present invention, the fabric monolayer 30 is adhered not only to the outer surface of the shoe upper, but also to the inner surface of the shoe upper which is in direct contact with the foot or the side surface of the foot to protect the cork monolayer 10.

The kind of the fabric used for the fabric monolayer 30 is not particularly limited, and it is preferable to select one of the cotton, hemp, wool, and synthetic fabrics as typical natural fabrics. Such a fabric fabric is generally ventilated, and even after adhering to the cork monolayer 10 which has fine pores, it is possible to maintain a good air permeability.

The footwear upper according to the present invention can protect the cork raw layer by forming a fabric raw layer for protecting the cork raw layer on the outer surface and the inner surface of the shoe so that the shoe has excellent air permeability and antibacterial property, , The impact absorbing property is good and the wearing feeling is excellent and the fatigue feeling is relieved. In order to prevent the air permeability of the cork originated layer from being disturbed, by using the mesh hot-melt adhesive layer (20) The upper of the shoe can maintain excellent ventilation.

5, when the shoe upper is used to protect the cork monolayer 10 from the outer surface as well as the outer surface of the shoe upper 1, The fabric monolayer 30 is formed to protect the cork monolayer 10 while preventing the air permeability of the cork monolayer 10 from being interrupted by the use of a mesh hot melt adhesive layer 20, Since the footwear upper 1 can maintain a good ventilation property by adhering the monolayer 30, the manufactured footwear decomposes the sweat, keratin and organic substances secreted from the feet of the foot by the foot odor to produce isovaleric acid, Ammonia, hydrogen sulfide and so on. It has excellent antimicrobial properties and ventilation to suppress the growth of bacteria. .

In the method of manufacturing the upper of the footwear according to the present invention, the cork material layer 10 is formed by laminating a hot-melt adhesive layer 20 and a woven fabric layer 30 on one side of a cork fabric, A hot-melt adhesive layer 20 and a fabric knitted layer 30 are laminated on the other side of the cork fabric, and then the resultant is compression-molded by roll processing.

That is, the upper layer of the hot-melt adhesive layer and the fabric layer is laminated on both sides of the cork monolayer to produce a shoe upper, thereby protecting the cork monolayer having mold resistance and antimicrobial properties while preventing the ventilation of the cork monolayer from being disturbed, It is possible to maintain an excellent ventilation property, and it is characterized not only that there is little foot odor due to such ventilation and antibacterial property but also shows shock absorption property against external impact, so that it can relieve an excellent feeling of wear and fatigue of foot.

Since the cork material layer, the hot-melt adhesive layer and the fabric material layer have been described above in detail, the description of the present invention having the above-described characteristics will be omitted here.

According to the present invention, it is preferable that the roll processing is performed by pressing at a temperature of 70 to 250 DEG C at a pressure of 40 to 60 kg / cm < 2 > for 1 to 3 minutes according to the type of the hot melt adhesive,

In the above, the temperature condition at the time of compression molding by roll processing is appropriately adjusted according to the melting point of the hot-melt adhesive, and when the compression molding conditions are less than the range of the above-described conditions, the cork single layer and the fabric single- If the compression molding conditions exceed the range defined above, the shape of the upper part of the shoe for which the cork single layer and the textile single layer are bonded at the time of compression molding under the conditions of high temperature or high pressure is deformed Or may be damaged.

Hereinafter, a footwear upper having a cork material layer laminated according to the present invention will be described in detail with reference to the following examples, but the technical constitution of the present invention is not necessarily limited to the following examples.

1. Manufacture of shoe upper for laminated cork monolayer

(Example 1)

First, 85% by weight of a cork powder having a particle size of 0.5 to 3 mm and 15% by weight of an adhesive were mixed and pressed to prepare a cork raw material sheet in the shape of a raw material, and a cork raw material layer A hot melt adhesive of a mesh type of ethylene vinyl acetate (EVA) resin and a fabric knitted fabric were laminated and then pressed at a temperature of 80 DEG C at a pressure of 50 kg / cm < 2 > for 1 minute by roll processing,

The same hot-melt adhesive layer and the fabric monolayer used on one side of the cork fabric were also laminated on the other side of the cork fabric, followed by compression molding by roll-forming under the same conditions to produce a shoe upper.

(Example 2)

A shoe upper was prepared in the same manner as in Example 1 except that 90 wt% of cork powder having a particle size of 0.5 to 3 mm and 10 wt% of an adhesive were mixed and then pressed to form a raw cork single layer To produce a shoe upper.

(Comparative Example 1)

In general, cotton fabrics used for canvas shoes were used as upper shoes for shoes.

2. Performance evaluation of shoe upper

The performance of each of the shoes of Examples 1 and 2 and Comparative Example 1 was evaluated, and the results are shown in Table 1 below.

division Example 1 Example 2 Comparative Example 1 Test Methods Air permeability (cm3 / sec / cm2) 43 42 45 KS K0570 Mold resistance 3 3 One KS A0702 Antimicrobial activity (%) 1 99.9 99.9 0 JIS Z2801
Species 2 99.9 99.9 0 foot smell
(ammonia
Measurement concentration) 30 minutes 40 40 500 Gas detection method 60 minutes 30 35 485 90 minutes 20 25 470 120 minutes 15 15 460 Resilience (%) 20 23 - -

1) Air permeability: The test was conducted in accordance with KS K 0570, and the air permeability was evaluated by the amount of air passing through a shoe upper of ㎠ for 1 second.

2) Mold resistance: The test strain was tested in accordance with KS A0702. The test specimens were incubated with a mixed spore suspension (Aspergillus niger ATCC 6275, Penicillium citrinum ATCC 9849, Rhizopus nigricans SN32, Cladosporinum Herbarum IAM.F517, Chaetomium globosum ATCC 6205) ± 2 ° C and 95% to 99% humidity for 4 weeks. The indication of fungus resistance

- 3: The development of hyphae is not recognized in the area where the sample or test specimen is inoculated.

- 2: The area of growth of mycelia recognized in the area of sample or specimen inoculated does not exceed 1/3 of the whole area.

- 1: The growth area of the hypha recognized by the sample or specimen inoculated area exceeds 1/3 of the whole area.

3) Antimicrobial activity: The test was carried out according to JIS Z 2801 (film adhesion method, 2000). Staphylococcus aureus ATCC 6538P and Escherichia coli ATCC 8739 were used as the test strains 1 and 2, respectively.

4) Foot odor: To measure the degree of foot odor, the gas concentration was measured with time using ammonia (NH ₃ ) gas, one of the main odors of foot odor.

5) Rebound Elasticity: In order to confirm the impact absorbability, a ball dropping device was used to measure the height of a ball dropping at a constant height by dropping the ball, and then the return height was expressed as a percentage divided by a constant height.

Therefore, as shown in Table 1, Examples 1 and 2 are formed by forming a hot-melt adhesive layer and a woven monolayer on both sides of a cork monolayer and using a mesh-type hot melt adhesive as a hot-melt adhesive layer The upper and lower layers of the cork material layer and the fabric layer were adhered to each other so that the fine pores of the cork material layer and the dots of the mesh hot melt adhesive were not melt- . In particular, the antimicrobial resistance and antimicrobial activity were very excellent, so that the measured concentration of ammonia, which is one of the causes of bacterial smell caused by bacteria, was much lower than that of Comparative Example 1. And it was measured that the bacterial growth was suppressed to exhibit antimicrobial activity and at the same time to have air permeability, so that foot odor was scarcely generated.

In addition, when the upper layer of cork is laminated to produce the upper part of the shoe, the repulsion elasticity is superior to that of the shoe upper of the comparative example 1 using the general cotton fabric.

However, Comparative Example 1 showed ventilation similar to Examples 1 and 2, but did not exhibit mold resistance and antimicrobial activity, and accordingly the measurement concentration of ammonia was very high, indicating that the foot odor was very high.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. As will be appreciated by those of ordinary skill in the art.

1: upper
10: Cork monolayer 20: Hot-melt adhesive layer
22: Dot 30: Fabric Monolayer

Claims (4)

In a shoe upper,
A hot-melt adhesive layer and a fabric monolayer are formed on both sides of the cork monolayer,
Wherein the hot-melt adhesive layer is formed using a mesh-type hot-melt adhesive.
The method according to claim 1,
Characterized in that the cork fabric used for the cork raw monolayer is prepared by mixing 85 to 90% by weight of pulverized cork powder and 10 to 15% by weight of an adhesive, followed by pressing to form a sheet in the form of a raw material. Upper.
delete The method according to claim 1,
Characterized in that the fabric used for the fabric monolayer is one selected from cotton, hemp, wool, and synthetic fabrics as natural fabrics.

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