KR102132305B1 - Method of forming image on surface of leather and leather product using the same - Google Patents

Abstract

The present invention relates to a method for forming an image on a surface of leather, which comprises the following steps: preparing leather; forming an image layer on the leather with a mixed paint composition of color paint and a leather softener; pressing the leather having the image layer formed thereon under a condition of a temperature of 60 to 80°C and a pressure of 100 to 200 kg to allow 50 to 70% of the image layer to be inserted into a surface layer part of the leather with a height of 10 to 20% from the surface of the leather; and coating a top coat on the leather having 50 to 70% of the image layer inserted thereinto. According to the present invention, the image formed on a surface of the leather is strongly maintained and a process of a leather article decorated by a picture is reduced to increase productivity, conservativeness is increased to provide a clear picture to be expressed to the outside so that a clear picture is expressed to the outside, a surface strength of a base and the intrinsic strength of the leather are increased to lengthen lifespan, gloss and the conservativeness of the picture are maintained after long-term storage, and conservative and decoration effects of the base are increased and the surface strength and the intrinsic strength are increased to improve the quality of a leather product while maintaining gloss after long-term storage.

Description

METHOD OF FORMING IMAGE ON SURFACE OF LEATHER AND LEATHER PRODUCT USING THE SAME}

The present invention relates to a method for forming an image of a leather surface and a leather product using the same. More specifically, it relates to an image forming method in which the formed image is firmly and maintained by controlling the composition of the coating material based on the image formed on the leather surface, and performing a pressing process after forming the image, and a leather product using the same. .

In general, the image formed on the leather has a flat pattern formed by printing or drawing a predetermined shape or color on the leather surface and an embossing pattern formed by giving a convex three-dimensional effect to the leather surface.

Conventional methods of forming a flat pattern on leather include the following methods.

First, as a transfer method, first, a transfer paper having a predetermined pattern is prepared, and then the transfer paper is placed on the leather fabric and heat and pressure are applied to transfer the pattern formed on the transfer paper to the leather fabric surface.

This method has a burden of first forming a pattern on a relatively expensive transfer paper, and is expensive because it can only be used once.

Second, as a printing method, it is a method of printing by digging a groove in a predetermined shape on a cylindrical roller or a flat plate mold, inserting ink of a predetermined color into the groove, and then pressing it on a leather fabric.

Unlike transfer paper, this method is advantageous for mass production because it can be used multiple times if only one roller or mold is produced, but it is difficult to modify the pattern once it is produced.

In addition, in the case of printing multiple colors, it is necessary to produce a roller or mold for each color and print several times for each color. And, there is a disadvantage that it is difficult to form a fine pattern.

Third, as a screen printing method, a pattern is formed by preparing a disc having a pattern through which ink can pass in a predetermined shape, and then placing a leather fabric under the disc to screen print.

Similar to the printing method, this method has a burden of manufacturing a disc, and when printing multiple colors, it is necessary to print several times with multiple discs and there is an alignment burden of the leather fabric.

Fourth, it is a manual method, which is a method of drawing manually on the surface of a leather fabric.

This method takes a lot of time and increases the cost of a leather product, the quality difference is large depending on the skill of the worker, the picture is not firmly attached, and there is a disadvantage that it is easily detached.

As described above, since the conventional pattern printing method is expensive and the process is complicated, a method of providing an image or pattern to leather in a simpler method is required. In particular, there is a need for a simple method that can keep various images or patterns firmly according to the tastes of consumers who are gradually diversifying.

Korean Patent Publication No. 10-2000-30856

Accordingly, it is an object of the present invention to provide a method of forming an image that remains firmly on the surface of leather.

The object is to prepare a leather fabric; Forming an image layer on the leather fabric using a mixed coating composition made of a color paint and a leather eggplant; The leather fabric having the burn layer is pressed under a temperature of 60 to 80° C. and a pressure of 100 to 200 kg, into the surface layer portion of the leather fabric having a height of 10 to 20% from the surface of the leather fabric, 50 to 50 of the burn layer. 70% incoming; And it is achieved by the image forming method of the leather surface comprising the step of applying an upper coating agent on the leather fabric is drawn 50 to 70% of the burn layer.

Before forming the burn layer, the method further includes forming a lower coating layer by applying a lower coating agent on one surface of the leather fabric, and the lower coating agent may be wax or acrylic resin.

The leather branch is 5.0 to 8.0 parts by weight of synthetic branch compared to 100 parts by weight of the color paint, 5.0 to 7.0 parts by weight of lanolin-based anionic branch, 0.1 to 0.5 parts by weight of auxiliary branch, and 3.0 to 5.5 parts by weight of water-soluble synthetic branch It may contain wealth.

The upper coating agent is preferably a wax or acrylic resin.

The above object is also achieved by a leather product in which an image is formed on the surface of the leather by the image forming method of the leather surface described above.

According to an embodiment of the present invention, it is possible to provide an image forming method in which an image formed on a leather surface is held firmly.

In addition, according to an embodiment of the present invention, it provides an effect of improving productivity by reducing the process of a leather article decorated with a picture.

In addition, according to an embodiment of the present invention, the base is in a state in which a picture decoration part is formed by drawing a picture using a technique such as paint, pigment, and peanut on one side of a base formed of an article in the form of an article. As the preservability is improved to the outside, the picture can be expressed from the outside so that a clear picture can be expressed to the outside.

And according to one embodiment of the present invention, the upper coating layer is formed on the outside of the base provided with the picture, while the picture is expressed to the outside, the surface hardness and the self-strength of the base are improved to increase the service life and store for a long time. Degree gloss and preservation of the picture can be improved.

In addition, according to an embodiment of the present invention, the upper coating layer is formed on the base of the leather fabric in a state decorated with a picture to improve the preservation and decorative beauty of the base, improve the surface hardness and self-strength, and shine even after long-term storage. It can improve the quality of leather products while maintaining it.

1 is a flow chart for explaining a method of forming an image, which is an embodiment of the present invention.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present invention, terms such as “include” or “have” are intended to designate the existence of features, components, and the like described in the specification, and one or more other features or components may not be present or added. It does not mean nothing.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention. Does not.

Hereinafter, an image forming method of a leather surface, which is an embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

However, the accompanying drawings are exemplary, and the scope of the image forming method of the leather surface, which is an embodiment of the present invention, is not limited by the attached drawings.

1 is a flow chart for explaining a method of forming an image, which is an embodiment of the present invention.

As shown in Figure 1, the method of forming an image according to an embodiment of the present invention comprises the steps of preparing a leather fabric (S10); Forming an image layer on the leather fabric using a mixed coating composition made of a color paint and a leather eggplant (S20); The leather fabric having the burn layer is pressed under a temperature of 60 to 80° C. and a pressure of 100 to 200 kg, and into the surface layer of the leather fabric having a height of 10 to 20% from the surface of the leather fabric, 50 to 70% of the burn layer The step of being introduced (S30); And applying an upper coating agent on the leather fabric in which 50 to 70% of the burn layer is drawn. Hereinafter, the present invention will be described in more detail for each step.

First, a leather fabric is prepared (S10). Here, the leather fabric may be natural leather or synthetic leather. In addition, it may be a leather provided after undergoing some processing applicable to the leather processing field. Natural leather means leather collected from almost all animals, including goats, rabbits, snakes, crocodiles, and sharks, including cows, horses, pigs, and sheep.

Here, the meaning of leather processing includes an oily process, a tanning process, and the like, which will be described later. In general, raw hides of animals used as raw materials for manufacturing natural leather contain a large number of animal tissues, and thus, if they are to be stored for a long time, rot occurs easily. Therefore, in the process of processing natural leather products, there is a need for a process for converting animal ingredients present in raw hides into vegetable ingredients, generally an oily process also called tanning.

In particular, it includes a tanning process provided to prevent decomposition and decay of animal skin and prevent stiffness due to drying among oily processes. In addition, it may include various processes provided during general leather processing such as a dyeing process.

In the case of synthetic leather, since the surface treatment is completed and a fabric having a predetermined background color and a uniform width is provided in a roll form, special pretreatment may not be necessary, but in particular, in the case of natural leather, the size and shape are various and the surface It is also relatively uneven, and it is preferable to pre-treat it as needed, because it is provided in units of sheets rather than in the form of a roll.

For such pretreatment, iron pressing to smooth the surface by applying predetermined heat, pressure, or tensile force to the leather fabric, coating a base color to spray or apply a pigment or ink of a certain color on the surface of the leather fabric, and the leather fabric to a predetermined standard And cutting foundations.

Since such pre-treatment may also be included in the present invention, and a person skilled in the art to which the present invention pertains, a method that can be easily applied may be applied, so a detailed description thereof will be omitted.

Here, a step of forming a lower coating layer by applying a lower coating agent on one surface of the leather fabric may be further included. The lower coating agent may be a wax or acrylic resin. It is coated with acrylic or wax, which not only makes the rough surface of natural leather flat, but also helps dye coloring, which is a common follow-up process.

Then, an image layer is formed on the prepared leather fabric using a mixed coating composition made of a color paint and a leather eggplant (S20).

Here, the image means an image, and may be a picture or a pattern. The picture or pattern can be formed manually by the operator, and a preset picture or pattern can be formed on the surface of the leather through the transfer method.

As the paint used, a mixed paint composition made of a color paint and a leather branch may be used. The fatliquoring agent is a fat or oil added as a protective agent for leather, such as animal or vegetable oil, mineral oil (machine oil, spindle oil, liquid paraffin, paraffin, etc.) and wax. They can provide the softness, swelling, tactile feel, and tightening strength required for each leather, or may provide water resistance to some types of leather.

That is, the present invention can provide a basic effect of a branching agent when forming an image by mixing a paint and a branching agent for forming an image.

In particular, it may include 5.0 to 8.0 parts by weight of synthetic branching agent, 5.0 to 7.0 parts by weight of lanolin-based anionic branching agent, 0.1 to 0.5 parts by weight of auxiliary branching agent, and 3.0 to 5.5 parts by weight of water-soluble synthetic branching agent, relative to 100 parts by weight of color paint. have.

As an example, based on 100 parts by weight of a color paint, 5.0 to 8.0 parts by weight of a synthetic branching agent such as'SYNTHOL YY707 (Smit)', lanolin-based anionic phosphate such as'Aniol SE (Nippon Fine Chemical Co. Ltd.)' 5.0 to 7.0 parts by weight of a branching agent, 0.1 to 0.5 parts by weight of an auxiliary branching agent that can be well mixed with vegetable oil/lecithin/phosphoric acid, such as'DOBAMIN MKB (Dongwoo Industry)','CYON 117 (SOGO ENTERPRISE CO., LTD. )'may include 3.0 to 5.5 parts by weight of a water-soluble synthetic branching agent.

In addition, an intermediate coating can be applied directly onto the image. In addition to minimizing the sublimation and disappearing part, it is possible to maintain the natural color, and to maintain the texture of the natural leather.

As an example, the components of the intermediate coating agent may include cellulose, an organic solvent, nonong and chloroprene rubber, and the organic solvent is preferably butyl acetate and acetone, 25 to 35% by weight of cellulose relative to the total weight of the intermediate coating agent, and an organic solvent 30 to 40% by weight, non-agricultural 10 to 20% by weight, chloroprene rubber 15 to 25% by weight may be made.

Then, the leather fabric having the burn layer is pressed under a temperature of 60 to 80° C. and 100 to 200 kg pressure, and into the surface layer portion of the leather fabric having a height of 10 to 20% from the surface of the leather fabric, 50 to 70 of the burn layer The step in which% is drawn is performed (S30).

In the press method using some transfer paper, the press is pressed for 30 seconds or more with a press for 15-19 seconds at 100-600 kg or more, but in the present invention, since the image is already attached to the leather surface, the temperature is 60 to 80° C. and 100 Pressing under a pressure condition of 200 to 200 kg can provide a sufficient effect. Through this, it is possible to prevent deformation of the natural leather.

Further, 50 to 70% of the burn layer is drawn into the surface layer portion of the leather fabric having a height of 10 to 20% from the surface of the leather fabric.

That is, the surface layer part is limited to a layer having a height of 10 to 20% based on the surface, and a part of the burn layer formed on the leather surface penetrates into the layer.

Further, preferably 50 to 70%, more preferably 55 to 65%, more preferably 58 to 62%, most preferably 60% of the above-described image layer can be drawn in.

Through this, it is possible to prevent the image layer from being drawn below the surface of the leather fabric, and the image layer is peeled off.

Then, an upper coating agent is applied on the leather fabric having 50 to 70% of the burned layer (S40).

The top coating may be wax or acrylic resin. It is coated with acrylic or wax, which can not only make the rough surface of natural leather flat, but also improve the preservability of the imaged leather.

Through this series of processes, it is possible to provide a leather product to which the burn layer is firmly attached.

Hereinafter, the present invention will be described in more detail through specific examples. However, these examples are only intended to illustrate the present invention and are not intended to be limiting.

Experimental Example

Example 1. Leather bag with figure shape attached

In order to measure the degree of adhesion of the image, the following experiment was conducted. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 65° C. and 100 kg pressure, a coating layer was formed with an upper coating solution (wax).

Example 2

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After the leather fabric on which the burn layer was formed was pressed under a temperature of 75° C. and a pressure of 110 kg, a coating layer was formed with an upper coating solution (wax).

Example 3

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 65° C. and a pressure of 180 kg, a coating layer was formed with an upper coating solution (wax).

Example 4

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 75° C. and a pressure of 180 kg, a coating layer was formed with an upper coating solution (wax).

Comparative Example 1

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 50° C. and a pressure of 120 kg, a coating layer was formed with an upper coating solution (wax).

Comparative Example 2

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 90° C. and a pressure of 120 kg, a coating layer was formed with an upper coating solution (wax).

Comparative Example 3

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 70° C. and a pressure of 50 kg, a coating layer was formed with an upper coating solution (wax).

Comparative Example 4

Additional experiments were conducted in a similar manner to Example 1. A cowhide fabric was prepared, and an image layer was formed on the cowhide fabric using a mixed coating composition. After pressing the leather fabric on which the burn layer was formed at a temperature of 70° C. and a pressure of 250 kg, a coating layer was formed with an upper coating solution (wax).

Experimental Example 1

After leaving for 5 days at room temperature in the air conditions of Examples 1 to 4 and Comparative Examples 1 to 4 described above, the degree of peeling of the image layer was determined. Specifically, Examples 1 to 4 and Comparative Examples 1 to 4 were carried out Cross-cut test to evaluate the adhesion of the coating film sample. After forming 100 checkerboard patterns at 1 mm intervals using a cross-cut tester, the cellophane tape was closely adhered to each other and quickly peeled off in the opposite direction, and the degree of peeling was observed.

The state in which peeling and cracking did not occur is 5 points, when peeling and cracking is within 5% of the total area is 4 points, when peeling and cracking is within 5 to 15% of the total area, 3 points, and peeling and cracking is the entire area When 15 to 35% of the time was 2 points, when peeling and cracking was within 35 to 65% of the total area, 1 point, and when peeling and cracking was 65% or more of the total area was measured as 0 points.

Examples 1 to 4 were 4 points, 5 points, 4 points, and 4 points, respectively. In contrast, Comparative Examples 1 to 4 were all 3 points.

Therefore, it was confirmed that the adhesion of the image was excellent in the leather product manufactured by the method of the present invention.

Although described above with reference to the preferred embodiments of the present invention, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

Claims (5)

Preparing a leather fabric;
Forming an image layer on the leather fabric using a mixed coating composition made of a color paint and a leather eggplant;
The leather fabric having the burn layer is pressed under a temperature of 60 to 80° C. and a pressure of 100 to 200 kg, into the surface layer portion of the leather fabric having a height of 10 to 20% from the surface of the leather fabric, 50 to 50 of the burn layer. 70% incoming; And
A method of forming an image of a leather surface, comprising applying an upper coating agent on a leather fabric in which 50 to 70% of the image layer is drawn. According to claim 1,
Before the step of forming the image layer,
Further comprising the step of forming a lower coating layer by applying a lower coating agent on one surface of the leather fabric,
The lower coating agent is a method of forming an image of a leather surface that is a wax or acrylic resin. According to claim 1,
The leather composition is 100 parts by weight of the color paint,
5.0 to 8.0 parts by weight of synthetic branching agent,
Lanolin-based anionic branching agent 5.0 to 7.0 parts by weight,
0.1 to 0.5 parts by weight of auxiliary branching agent and
A method of forming an image of a leather surface comprising 3.0 to 5.5 parts by weight of a water-soluble synthetic fatliquoring agent. According to claim 1,
The upper coating agent is a method of forming an image of a leather surface that is a wax or acrylic resin. A leather product in which an image is formed on the surface of leather by the image forming method according to any one of claims 1 to 4.

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