KR20160133939A

KR20160133939A - Method for manufacturing shoe upper material using by-products of leather

Info

Publication number: KR20160133939A
Application number: KR1020150067179A
Authority: KR
Inventors: 황경환; 김형석
Original assignee: (주)슈맥스; 황경환
Priority date: 2015-05-14
Filing date: 2015-05-14
Publication date: 2016-11-23

Abstract

The present invention relates to a preparation method of a shoe upper material using a byproduct of natural leather. The prepared shoe upper material has tensile or tearing physical property values equal to the properties of natural leather, and has excellent water resistance. Also, the prepared shoe upper material can effectively maintain durability and elasticity even under repeated external force and contact. The preparation method can prepare such shoe upper material at low costs. The preparation method of the shoe upper material comprises: a raw material preparation step (1) of preparing a byproduct generated from a manufacturing process of natural leather; a pulverization step (2); a water mixing step (3) of forming a mixture by mixing the pulverized product with water; a neutralization step (4) of changing the pH of the mixture to a neutral state by adding sodium hydroxide; an oil addition step (5) of adding oil for leather; a binder mixing step (6) of mixing an aqueous polyurethane binder, and mixing the resultant product; a molding step (7) of molding the resultant product into a plate form, and forming a plate having a fixed width by compressing and drying the resultant product; a fabric lamination step (8) of laminating a fabric composed of a natural or a synthetic fiber material; and a surface treatment step (9).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a shoe upper material using by-products of natural leather,

The present invention relates to a method for producing a shoe outer material using a by-product of natural leather, and more particularly, to a method for manufacturing a shoe outer material using a by- Which can effectively maintain the durability and elasticity even when contact with the excellent and repetitive external force is applied, can be manufactured at a lower cost than the natural leather.

Generally, natural leather is a material having good texture, various patterns, strong tensile or phosphorus physical properties, and is widely used for manufacturing everyday familiar items such as clothes, bags, shoes, etc. However, It is treated at a higher price than other fabric materials.

Natural leather, which is treated at a higher price than other fabric materials, is subject to a great obstacle to commercialization due to its vulnerability to water. Especially when natural leather is used as a material for shoe sheathing, when it is exposed to rain or water, It is necessary to remove the stain by applying a protective material such as a leather so that it is not easy to manage. In addition, since it is easily contaminated by other substances or is damaged due to surface migration There is a problem that the original texture can not be maintained.

Conventionally, in order to solve such a problem, a natural leather used as a material for a shoe outer jacket has been directly treated with a chemical, rolled, padded, printed or otherwise processed.

However, if the chemical is directly treated with natural leather, the chemical may penetrate into the leather, deforming the shape of the leather, or curing as time elapses. If repeated external force or contact is applied, There is a problem that durability and elasticity are remarkably lowered or mold or spew is generated when stored.

Therefore, it is possible to maintain durability and elasticity even when a contact is made with repetitive external force, which has the same tensile or tensile properties as that of natural leather, has excellent waterproofness, and enables mass production at a lower cost than natural leather. There has been an urgent need to develop a material for a shoe sheath which can be effectively replaced.

Korean Registered Patent No. 10-0652124 (Registration date: November 23, 2006)

Disclosure of the Invention The present invention has been conceived in order to solve the above-mentioned problems. It is an object of the present invention to provide a method for producing a natural leather by using by-products generated in the process of producing natural leather, A technical object of the present invention is to provide a shoe sheath material which can effectively maintain durability and elasticity at a lower cost than natural leather.

According to another aspect of the present invention, there is provided a method of manufacturing a shoe sole, comprising the steps of: preparing a by-product of natural leather, which is a raw material of a shoe outer covering material; a crushing step of crushing by- A water mixing step of mixing the pulverized by-product with the water to form a mixture, and a step of adding 0.1 to 0.5 wt% of sodium hydroxide to the mixture formed through the water mixing step to change the pH of the mixture to neutral Adding an oil-added step of adding 10 to 30 wt% of a leather oil to the neutralized mixture through the neutralization step, and adding the oil-added mixture to the oil-added mixture in an amount of 1 to 50 wt% A binder-mixing step of mixing and stirring the binder; and a step of mixing the binder- A flattening step of forming a flat plate having a predetermined thickness by compression and drying, and a fabric laminating step of laminating a natural or synthetic fiber fabric to a flat plate formed through the flattening step; And a surface treatment step of coating and finishing the surface.

According to the process for producing a material for shoe outer sheath using the by-product of natural leather according to the present invention, which is constituted as described above, by using the by-product generated in the process of manufacturing natural leather, It is possible to manufacture a material for a shoe sheath which can effectively maintain durability and elasticity at a cost lower than that of natural leather, even when contact is made with repetitive external force, which is excellent in waterproofness.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a step-by-step process for producing a material for shoe outer sheath using by-products of natural leather according to the present invention.

Hereinafter, the present invention will be described in detail with reference to FIG. 1 in order to accomplish the above object.

1, a raw material preparing step (1), a pulverizing step (2), a water mixing step (3), a neutralizing step (4), and a neutralizing step , An oil addition step (5), a binder mixing step (6), a flattening step (7), a fabric lining step (8), and a surface treatment step (9).

The raw material preparation step (1) is a step of preparing a by-product of natural leather, which is a raw material of a shoe outer material. In the present invention, a by-product generated in the production of natural leather is used as a raw material. Shaving scrap, a solid waste generated in the shaving process of polishing the leather to the required thickness, is mainly used.

The reason for using the shaving scrap as a raw material among byproducts generated in the production of natural leather in the method of manufacturing a material for shoe outer sheath according to the present invention is that it is easy to procure raw materials and has a relatively large amount of water, It is because.

The pulverizing step (2) comprises pulverizing a by-product of natural leather prepared in the raw material preparing step (1) by using a pulverizer, wherein the by-product of the natural leather prepared in the raw material preparing step (1) And then pulverized into a fine fiber form using a pulverizer such as a disk mill or other fiber grinding machine.

The water mixing step (3) comprises mixing the pulverized by-product with the water through the pulverizing step (2) to form a mixture, wherein the pulverizing step (2) The water is mixed to form a sludge-like mixture.

When the sludge-like mixture is formed by mixing water with the by-products that have been pulverized in the water mixing step (3), the sodium hydroxide added in the neutralization step (4) is uniformly mixed with the by- So that by-products of natural leather can be neutralized more effectively.

The neutralization step (4) is a step of neutralizing the pH of the mixture by adding sodium hydroxide (NaOH) to the mixture formed through the water mixing step (3). As a by-product of natural leather used as a raw material in the present invention, The mixture is neutralized by adding 0.1 to 0.5 wt% of sodium hydroxide (NaOH) to the mixture formed through the water mixing step (3).

At this time, the addition amount of the sodium hydroxide is limited to 0.1 to 0.5 wt% because if the added amount is less than 0.1 wt%, the pH of the mixture does not change, and when the added amount exceeds 0.5 wt%, the pH of the mixture becomes alkaline .

The oil addition step (5) is a step of adding 10 to 30 wt% of the leather oil to the neutralized mixture through the neutralization step (4), and the filling feeling and the flexibility The neutralization step (4) is followed by the addition of 10 to 30 wt% of the leather oil to the neutralized mixture.

At this time, vegetable oils such as Mimosa, Chestnut, and Quebracho and other synthetic oils are used as the leather oil.

The reason why the amount of the leather oil added is limited to 10 to 30 wt% is that when the addition amount is less than 10 wt%, the filling feeling and flexibility of the shoe outer material are lowered. When the addition amount exceeds 30 wt%, the flexibility Is too much.

The binder mixing step (6) is a step of mixing and stirring the water-soluble polyurethane binder with the oil-added mixture via the oil addition step (5), wherein the smoothness between the fine fibers contained in the mixture In order to induce bonding, 1 to 50 wt% of a water-soluble polyurethane binder is mixed with the oil-added mixture through the oil addition step (5) and stirred.

The reason why the amount of the water-soluble polyurethane binder added is limited to 1 to 50 wt% is that if the amount of the additive is less than 1 wt%, the tensile or tensile properties of the material for the shoe outer jacket significantly deteriorate. When the additive amount exceeds 50 wt% Or the physical properties of the phosphoric acid are excessively increased, the flexibility of the material for the shoe outer jacket remarkably decreases.

The flattening step (7) is a step of forming a mixture in which the binder is mixed through the binder mixing step (6) into a flat plate, and the mixture having been subjected to the binder blending step (6) Molded, compressed and dried to form a flat plate having a predetermined thickness.

At this time, the thickness of the flat plate can be freely adjusted according to the purpose of use of the material for shoe outer sheath.

The fabric lining step (8) is a step of laminating a fabric to a flat plate formed through the flattening step (7), and laminating a natural or synthetic fiber fabric to a flat plate formed through the flattening step (7) .

At this time, the fabric bonded to the flat plate formed through the flattening step (7) not only plays the role of reinforcing the tensile strength and tear strength of the flat plate made of the natural leather, but also protects the inner surface of the material for the shoe outer cover To serve as a soft lining.

The surface treatment step (9) is a step of coating and finishing the surface of the flat plate through the fabric lining step (8), and finishes by coating the surface of the flat plate like a general appearance of a leather product.

According to the process for producing a material for shoe outer sheath using the by-product of natural leather according to the present invention, which is constituted as described above, by using the by-product generated in the process of manufacturing natural leather, A material for a shoe sheath which can effectively maintain durability and elasticity even when contact with an external force having excellent water repellency is applied can be manufactured at a lower cost than natural leather.

1: raw material preparation step
2: crushing step
3: water mixing step
4: neutralization step
5: Oil addition step
6: Binder blending step
7: Flattening step
8: fabric lining step
9: Surface treatment step

Claims

A raw material preparing step of preparing a by-product of natural leather, which is a raw material of a shoe sheathing material,
A pulverizing step of pulverizing by-products of natural leather prepared in the raw material preparing step using a pulverizer,
A water mixing step of mixing the pulverized by-product with the water through the pulverizing step to form a mixture,
A neutralization step of adding 0.1 to 0.5 wt% of sodium hydroxide to the mixture formed through the water mixing step to change the pH of the mixture to neutral,
An oil adding step of adding 10 to 30 wt% of leather oil to the neutralized mixture through the neutralization step,
Mixing the oil-added mixture through the oil addition step with 1 to 50 wt% of a water-soluble polyurethane binder, and stirring the mixture,
A flattening step of forming a mixture in which the binder is mixed through the binder mixing step into a flat plate shape, compressing and drying the flat plate to form a flat plate having a predetermined thickness;
A fabric laminating step of laminating a natural or synthetic fiber fabric to a flat plate formed through the flattening step,
And a surface treatment step of coating and finishing the surface of the flat plate having been subjected to the fabric lapping step.