KR20090095044A - Sheet for synthetic leather and manufacturing method thereof - Google Patents

Abstract

A synthetic leather sheet and a manufacturing method thereof are provided to solve an environmental pollution problem generating in a manufacturing process by using polypropylene, polyethylene, and EVA in a process. A synthetic leather sheet(100) includes an inner layer(130) consisting of nonwoven fabric materials, an intermediate layer(120) which is laminated on the inner layer, and an outer layer made of a film coating materials, and laminated on the top of the intermediate layer. The inner layer is formed with a nonwoven sheet. The inner layer is bonded with the intermediate layer by using bond laminate or the hotmelt laminate. The inner layer is made of one selected from a group consisting of polypropylene-based nonwoven fabric, polypropylene blend nonwoven, polyethylene-based nonwoven, polyethylene blend nonwoven, EVA-based nonwoven, and EVA blend nonwoven.

Description

Artificial leather sheet and manufacturing method thereof

The present invention relates to an artificial leather sheet and a method of manufacturing the same, and more particularly, having a low weight of excellent mechanical properties and excellent texture, thermoforming, and can be recycled in the manufacture of eco-friendly products and its artificial leather sheet It relates to a manufacturing method.

In general, artificial leather is manufactured and used using PVC, PU (Poly Urethane), synthetic rubber or thermoplastic olefin elastomer (hereinafter, abbreviated as TPO). These artificial leather is used as a protective cover of the sofa or car seats and other products through a separate sewing process, and serves to convey the beauty and texture to the user. Such artificial leather should consider resilience against load, pressure, texture, flexural elasticity, etc. to provide comfort and touch to the user.

However, in the case of artificial leather using PVC or PU, the smell is severe by PVC, there is a problem of the generation of harmful components caused by plasticizers, environmental problems due to the use of a solvent (solvent) in the manufacturing process and increase the processing cost. In addition, in the case of artificial leather made of synthetic rubber or TPO, the weight due to low foaming of less than three times is a little too much, and there is a problem of bending wrinkles when going to high foaming. In the case of making a low-thick sheet of cross-linked polyolefin high foaming, there is a problem in that there is a wrinkle problem and flexural elasticity, thereby reducing the feeling of adhesion or touch.

In addition, these artificial leathers are difficult to make secondary heat molding and must be sewn separately so that the work is difficult and complicated, the work period is long, and the cost is increased when the product is manufactured. There is a problem that is difficult.

The present invention was devised to solve the above problems, it does not cause odor or pollution due to the environment-friendly material, has a low density and excellent mechanical, physical and chemical properties of low weight, can be recycled artificial leather sheet And its manufacturing method.

Another object of the present invention is low recovery and flexural elasticity against load or pressure, excellent adhesion, touch and resilience, secondary thermoforming is possible to produce a variety of three-dimensional products to reduce the cost It is to provide an artificial leather sheet and a method of manufacturing the same.

In order to achieve the above object, the artificial leather sheet of the present invention, the inner skin layer made of a nonwoven material; An intermediate layer laminated on an upper surface of the inner layer and made of a foamed resin material; And an outer skin layer laminated on an upper surface of the intermediate layer and made of a film coating material.

The endothelial layer is formed of a nonwoven sheet, and is bonded to the intermediate layer by dry bond laminate or hot melt laminate.

In addition, the endothelial layer is any one material selected from the group consisting of polypropylene nonwoven fabric, polypropylene blend (bland) nonwoven fabric, polyethylene nonwoven fabric, polyethylene blend nonwoven fabric, EVA (ethylene vinyl acetate) based nonwoven fabric and EVA blended nonwoven fabric. It is preferable that it is formed.

The intermediate layer is preferably an open cell sheet defoamed by applying heat and pressure to the polyolefin foam.

In addition, the intermediate layer is preferably formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin.

The skin layer is formed of a film and adhered to the intermediate layer by heat laminate, dry bond laminate or hot melt laminate.

In addition, the outer layer is a polypropylene resin, polypropylene blend resin, polyethylene resin, polyethylene blend resin. It is preferably formed of any one material selected from the group consisting of EVA-based resins and EVA blended resins.

On the other hand, embossing is formed on the surface of the shell layer.

In addition, various patterns or patterns are printed on the surface of the outer skin layer, or a film on which various patterns or patterns are transferred on the surface of the outer skin layer is bonded by heat or adhesive.

Arure, the outer surface of the outer layer may be hard coated (UV coating) by PU (poly urethane), acrylic or melamine.

The method of manufacturing an artificial leather sheet for achieving the technical problem to be achieved by the present invention, (a) preparing a continuous foam sheet by degassing by applying heat and pressure to the polyolefin-based foam sheet to prepare an intermediate layer; (b) preparing an outer film by preparing a film through an extrusion process; (c) adhering an outer skin layer to an upper surface of the intermediate layer; And (d) adhering an inner skin layer made of a nonwoven sheet to an intermediate layer to which the outer skin layer is adhered.

In the step (a), the polyolefin foam sheet is prepared by electron beam crosslinking or chemical crosslinking to a polyolefin foaming agent, and the sheet is heated in an oven and foamed, cooled to room temperature, compressed by a compression roll, and degassed.

At this time, in the step of heating in the oven, it is preferable to proceed for 1 minute to 3 minutes at a temperature of dry temperature 180 ℃ to 310 ℃.

In addition, in the process of pressing with the pressing roll, the pressing temperature in the state of normal temperature, forming a tensile stress in the longitudinal direction than the sum of the thickness of the sheet to be injected to be pressed to 1/5 in the state of 120% pull-in, pressing rolling The speed is preferably maintained at 10-20 m / min.

The intermediate layer is preferably formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin.

In the step (b), polypropylene resin, polypropylene blend resin, polyethylene resin, polyethylene blend resin. Extrusion of any one material selected from the group consisting of an EVA-based resin and an EVA blend resin by low-temperature extrusion method, it is preferable to maintain the temperature of the cylinder at 150 ℃ or less. It is preferable to use a low temperature extrusion method in order to prevent such a problem in advance because the foaming agent of the fine powder remaining at excessive heat generation or high temperature may be foamed.

On the other hand, the outer layer and the intermediate layer is bonded by a thermal laminate, dry bond laminate or hot melt laminate, the intermediate layer and the inner layer is bonded by dry bond laminate or hot melt laminate.

The inner skin layer is preferably formed of any one material selected from the group consisting of a polypropylene nonwoven fabric, a polypropylene blended nonwoven fabric, a polyethylene nonwoven fabric, a polyethylene blend nonwoven fabric, an EVA nonwoven fabric, and an EVA blended nonwoven fabric.

Additionally, passing the artificial leather sheet through an embossing roll to form embossing on the surface of the skin layer.

On the other hand, including the step of printing a variety of patterns or patterns on the surface of the outer layer through the gravure printing method, or the step of adhering the film transfer of the various patterns or patterns to the surface of the outer layer using a heat or adhesive using a compression roll Include.

Including the step of UV coating on the surface of the skin layer for mechanical, physical, chemical strengthening, the UV coating is preferably cured using PU, acrylic, melamine and the like.

Flexural elasticity of the artificial leather sheet can be expressed widely depending on the intended use. The expression of this function is controlled by the basic properties of the resin used, the thickness of the epidermal layer and the embossing formation.

Artificial leather sheet according to the present invention and its manufacturing method can solve the problem of pollution occurring in the manufacturing process by using polypropylene, polyethylene, EVA, it is possible to recycle. In addition, by bonding a plurality of layers constituting the artificial leather sheet integrally to enable secondary thermoforming, it can be easily produced in a variety of three-dimensional model, thereby reducing the cost. In addition, it is produced at a low density, lighter than the same volume as the conventional artificial leather and excellent mechanical, physical and chemical properties, and excellent touch and adhesion. In addition, by converting the conventional independent bubble sheet into a continuous bubble type straw, there is no bending elasticity and low recovery force against load or pressure, so that the recovery characteristic against the compression load is excellent.

On the other hand, by embossing molding on the surface of the artificial leather sheet, the effect of cushioning, cushioning, heat retention can be expected, and the beauty of the artificial leather sheet can be improved by printing patterns or patterns on the surface of the sheet. In addition, by curing the surface of the sheet by UV coating imparts scratch resistance, and strengthens the mechanical, physical, and chemical properties.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a cross-sectional view showing an artificial leather sheet according to a first embodiment of the present invention.

Referring to FIG. 1, the artificial leather sheet 100 of the present invention includes an inner skin layer 130, an intermediate layer 120 stacked on an upper surface of the inner layer 130, and an outer skin layer 110 stacked on an upper surface of the intermediate layer 120. It is provided.

The inner skin layer 130 is made of a nonwoven material. More specifically, the inner skin layer 130 is any one material selected from the group consisting of a polypropylene nonwoven fabric, a polypropylene blended nonwoven fabric, a polyethylene nonwoven fabric, a polyethylene blend nonwoven fabric, an EVA (ethylene vinyl acetate) based nonwoven fabric, and an EVA blended nonwoven fabric. It is preferable that it is a formed nonwoven fabric sheet.

The intermediate layer 120 is an open cell sheet (opened cell sheet) degassed by applying heat and pressure to a polyolefin foam made of a foamed resin material. More specifically, the intermediate layer 120 is preferably formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin. By using the intermediate layer 120 as a continuous bubble-type sheet, it is possible to solve the problem of flexural elasticity caused by using a conventional independent bubbled sheet (crossed cell sheet), and to improve adhesion and touch, as well as There is no bending wrinkle, which solves the problems of the existing low foaming synthetic resin products and at the same time, the weight reduction effect of the entire interior sheet can be obtained with low density characteristics.

At this time, the inner skin layer 130 and the intermediate layer 120 is bonded by a dry bond laminate or a hot melt laminate. Dry bond laminate is a method of applying the adhesive and after the drying process to adhere the adhesives, hot melt laminate is a method of solidifying the adhesive after cooling by applying heat using the characteristics of fluidity at room temperature.

The envelope layer 110 is made of a film coating material. More specifically, the outer layer 110 is a polypropylene resin, polypropylene blend resin, polyethylene resin, polyethylene blend resin. It is preferably a film formed of any one material selected from the group consisting of EVA-based resins and EVA blended resins.

At this time, the outer layer 110 and the intermediate layer 120 is bonded by a heat laminate, a dry bond laminate or a hot melt laminate. That is, the inner skin layer 130 and the outer skin layer 110 are bonded to each other with the intermediate layer 120 interposed therebetween. The thermal laminate is a method of fusion by applying heat, and the dry bond laminate and the hot melt laminate are described above, and thus description thereof will be omitted.

On the other hand, it can be seen that the above-described inner skin layer 130, the intermediate layer 120 and the outer skin layer 110 is made of the same material. That is, by being composed of the same material can be made integral. Therefore, the artificial leather sheet 100 composed of an integral material is capable of secondary thermoforming, and is thermoformed into a three-dimensional shape of a three-dimensional model. Thus, it is used for the production of various products, and no separate sewing work is required, so that the cost reduction effect can be obtained.

In addition, an embossing 240 may be formed on the surface of the artificial leather sheet 200, that is, the surface of the outer skin layer 210 (see FIG. 2). At this time, the inner layer 230, the intermediate layer 220 and the outer layer 210 are the same as the inner layer 130, the intermediate layer 120 and the outer layer 110 of the first embodiment will not be described herein.

Forming the embossing 240 on the surface of the outer shell layer 210 is for the role of shock relief, beauty enhancement, insulation and cushioning, the formation of such embossing 240 is artificial to the embossing roll (not shown) commonly used The leather seat 200 is pressed and molded.

On the other hand, Figure 3 is a cross-sectional view showing an artificial leather sheet according to a third embodiment of the present invention.

Referring to the drawings, the artificial leather sheet 300 is the inner skin layer 330, the intermediate layer 320 stacked on the upper surface of the inner skin layer 330, the outer skin layer 310 and the outer skin layer 310 stacked on the upper surface of the intermediate layer 320 A printed layer 350 is provided on the surface of the substrate. Since the artificial leather sheet 300 is the same as the artificial leather sheet 100 of the first embodiment, description thereof will be omitted.

The print layer 350 is printed to produce various patterns or patterns (hereinafter referred to as 'picture') on the surface of the outer skin layer 310. For example, a picture may be directly printed on the surface of the envelope layer 310, or a film on which the figure is transferred may be adhered to the surface of the envelope layer 310. In the case of printing a picture directly on the outer skin layer 310 is printed through a gravure printing process. The gravure printing is mainly used for special materials such as vinyl or packaging materials, and is a method of printing by filling ink in the recessed portion of the printing plate. Since gravure printing is a known technique, a detailed description thereof will be omitted. In addition, when the film is transferred to the surface of the outer skin layer 310, the transferred film is bonded to the surface of the outer skin layer 310 by hot air, ultrasonic waves or high frequency heating or by an adhesive to produce a picture.

By directing the painting on the surface of the outer skin layer 310 as described above, the beauty of the artificial leather sheet 300 is improved to obtain an economic advantage.

On the other hand, the print layer 350 may be printed on the surface of the artificial leather sheet 200 of the second embodiment to produce a picture. That is, a picture may be directly printed on the surface of the outer skin layer 210 in which the embossing 240 is formed, or the transferred film may be bonded.

In addition, the surface of the outer skin layer 410 may be cured by UV coating (see Fig. 4). The UV coated coating layer 460 is to enhance the mechanical, physical and chemical properties of the artificial leather sheet 400, the surface is hard-coated by PU, acrylic or melamine. Thus, scratch resistance may be imparted to the surface of the artificial leather sheet 400.

The hard coating of the surface of the artificial leather sheet 400 may be selectively performed on the artificial leather sheets 100, 200, and 300 of the first, second and third embodiments. That is, the coating layer 460 is formed on the artificial leather sheets 100 and 200 of the first and second embodiments to enhance physical properties, and the coating layer 460 is formed on the artificial leather sheet 300 of the third embodiment. In addition to the enhancement of physical properties, it serves to protect the picture of the printed printed layer 350.

As a result, the artificial leather sheets 100, 200, 300, and 400 having the above structure are provided with a continuous foam sheet using PP, PE, and EVA resins, thereby providing flexibility in bending and bending elasticity. It is possible to improve the physical properties of the low weight without the generation of pollution in the manufacturing process, reuse, recycling is possible, and the feeling of touch and adhesion is improved.

Next, a method of manufacturing the artificial leather sheet according to the first embodiment of the present invention will be described with reference to FIG. 5.

First, a continuous foamed sheet is prepared by degassing by applying heat and pressure to the polyolefin foam sheet to prepare an intermediate layer 120 (S10). In the step (S10), the polyolefin foam sheet is a product foamed by electron beam crosslinking or chemical crosslinking of the polyolefin-based foaming agent, such a polyolefin foaming manufacturing process is already known technology, detailed description thereof will be omitted. The polyolefin foam sheet is heated in a oven at a temperature of 180 ° C. to 310 ° C. for 1 minute to 3 minutes, and then foamed, followed by decompression by pressing with a compression roll after cooling to room temperature. At this time, in relation to the numerical range of the temperature of the oven, if the lower limit is lower than the heat transfer to the polyolefin-based foam sheet is not preferable as a whole, and if the upper limit is exceeded, there is a fear that the polyolefin-based foam sheet is partially melted. It is not desirable. In addition, with respect to the numerical range for the time for heating the polyolefin-based foam sheet to the temperature, if the lower limit is lower than the overall heat transfer is insufficient, and if the upper limit is exceeded, the polyolefin-based foam sheet is overheated, which is not preferable. .

In the process of pressing with the pressing roll, the pressing temperature is maintained at 20 ℃ or less, to be pressed to 1/5 than the sum of the thickness of the sheet is added, the pressing rolling speed is maintained by 10 to 20m / min continuous bubble sheet Phosphorus interlayer 120 is prepared. Such a formation rate is preferably lowered if the thickness of the sheet is thick to maintain a low rate. At this time, although the compression temperature is expressed as 20 ℃ or less, it should be understood that it does not include the temperature below zero, meaning 0 ℃ or more.

On the other hand, the intermediate layer 120 is preferably formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin.

Next, a polypropylene resin, a polypropylene blend resin, a polyethylene resin, and a polyethylene blend resin. Extrusion of any one material selected from the group consisting of an EVA-based resin and an EVA blend resin is performed by low temperature extrusion to provide an outer skin layer 110 (S20). At this time, any one material of the coating material constituting the outer shell layer 110 is extruded into the cylinder of the extruder in order to control the coating thickness, the thickness of the coating material is made by applying a wide range of 30um to 1000um depending on the application.

On the other hand, in the process of providing the outer shell layer 110, the temperature is maintained at 150 ℃ or less, and extruding by low-temperature extrusion method, such a problem because the foaming agent of the fine powder remaining at excessive heat generation or high temperature may be foamed This is to prevent in advance.

When the envelope layer 110 and the intermediate layer 120 are provided, the envelope layer 110 and the intermediate layer 120 are adhered to each other by any one method selected from thermal laminate, dry bond laminate, and hot melt laminate (S30). The thermal laminate is a method of fusion by applying heat, the dry bond laminate is a method of attaching the adhesives after applying the adhesive and drying process, the hot melt laminate is cooled after applying heat using the characteristics of fluidity at room temperature If it is solidified.

When the outer skin layer 110 and the intermediate layer 120 are bonded to each other, the inner surface layer 130 made of a nonwoven fabric sheet is bonded to the other surface of the intermediate layer 120, that is, the outer layer 110 is not bonded (S40). . The adhesion of the endothelial layer 130 is adhered by dry bond laminates or hot melt laminates.

Meanwhile, the inner skin layer 130 is preferably formed of any one material selected from the group consisting of a polypropylene nonwoven fabric, a polypropylene blend nonwoven fabric, a polyethylene nonwoven fabric, a polyethylene blend nonwoven fabric, an EVA nonwoven fabric, and an EVA blended nonwoven fabric.

As a result, the artificial leather sheet 110 manufactured through the above steps is made of a single body consisting of the same material of each layer (the outer layer, the middle layer and the inner layer). Therefore, the artificial leather sheet 100 composed of an integral material is capable of secondary thermoforming, and is thermoformed into a three-dimensional shape of a three-dimensional model. Thus, it is used for the production of various products, and no separate sewing work is required, so that the cost reduction effect can be obtained. In addition, the intermediate layer 120 is an open cell sheet defoamed by applying heat and pressure to a polyolefin-based foam made of a foamed resin material, thereby solving the problem of flexural elasticity caused by using a conventional independent foam sheet. It can solve the problem and improve the adhesion and touch feeling, and also there is no bending wrinkle, which solves the problem of the existing low foaming synthetic resin products and at the same time, it can obtain the weight reduction effect of the entire interior sheet with low density characteristics.

Additionally, the artificial leather sheet 200 may be passed through an embossing roll to form the embossing 240 on the surface of the outer skin layer 210. By embossing 240 is formed on the surface of the artificial leather sheet 200, that is, the surface of the outer shell layer 210, it is possible to obtain the effects of shock relaxation, beauty improvement, insulation and cushioning. The embossing roll is embossed with irregularities formed on the outer circumferential surface of the roll, and molding the embossing with the embossing roll is already known in the art, so detailed description thereof will be omitted.

On the other hand, comprising the step of printing a picture on the surface of the artificial leather sheet 300 through a gravure printing method, or the step of adhering the film transferred to the surface of the artificial leather sheet using a heat or adhesive with a compression roll, that is, Proceeding to include the step of forming the printed layer 350. Printing pictures directly on the surface of the artificial leather sheet 300, or bonding the transferred film to improve the beauty of the artificial leather sheet 300, the embossed 240 artificial leather sheet 200 is molded To produce a picture, or to emboss the artificial leather sheet 100 that is not molded can produce a picture. Since the gravure printing process is a well-known technique, the detailed description thereof will be omitted, and the method of adhering the transferred film to the surface of the artificial leather sheet may be performed by hot air, ultrasonic waves, or high frequency heating. By applying and adhering by compression.

In addition, further comprising the step of UV coating, that is, forming a coating layer 460 on the surface of the artificial leather sheet 100, 200, 300 of each of the above-described embodiments for mechanical, physical and chemical reinforcement You can proceed. The coating layer 460 is to harden the surface by using PU, acrylic, melamine, etc., it may impart scratch resistance to the surface of the artificial leather sheet 400.

On the other hand, the flexural elasticity of the artificial leather sheet as described above can be set in a wide range depending on the usage method and the embossed state and the thickness and foaming ratio of the coating layer. That is, the flexural elasticity of the artificial leather sheet is preferably set to suit the intended use.

As a result, the artificial leather sheet having the structure as described above is to provide a continuous bubble-type sheet using PP, PE, EVA resin, so that there is no bending wrinkles and flexural elasticity, so that low-weight physical properties are improved without generation of pollution in the manufacturing process And reuse, recycling is possible, and the touch and adhesion is improved.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a cross-sectional view showing an artificial leather sheet according to a first embodiment of the present invention.

2 is a cross-sectional view showing an artificial leather sheet according to a second embodiment of the present invention.

3 is a cross-sectional view showing an artificial leather sheet according to a third embodiment of the present invention.

4 is a cross-sectional view showing an artificial leather sheet according to a fourth embodiment of the present invention.

5 is a block diagram for explaining a manufacturing process of artificial leather sheet according to the first embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 200, 300, 400: artificial leather sheet

110, 210, 310, 410: outer layer

120, 220, 320, 420: middle layer

130, 230, 330, 430: inner cortex

240: embossing

350: printed layer

460: coating layer

Claims (24)

An inner skin layer made of a nonwoven material; An intermediate layer laminated on an upper surface of the inner layer and made of a foamed resin material; And It is laminated on the upper surface of the intermediate layer, the outer layer made of a film coating material; artificial leather sheet comprising a. The method of claim 1, The inner skin layer is formed of a non-woven fabric sheet, artificial leather sheet, characterized in that the adhesive bonding by the intermediate layer and a dry bond laminate or hot melt laminate. The method of claim 2, The inner skin layer is formed of any one material selected from the group consisting of a polypropylene nonwoven fabric, a polypropylene blended nonwoven fabric, a polyethylene nonwoven fabric, a polyethylene blend nonwoven fabric, an EVA (ethylene vinyl acetate) nonwoven fabric, and an EVA blended nonwoven fabric. Artificial leather seat. The method of claim 1, The intermediate layer is an artificial leather sheet, characterized in that the continuous foam sheet (opened cell sheet) degassed by applying heat and pressure to the polyolefin-based foam. The method of claim 4, wherein The intermediate layer is artificial leather sheet, characterized in that formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin. The method of claim 1, The outer skin layer is formed of a film, the artificial leather sheet, characterized in that the adhesive is bonded with the thermal laminate, dry bond laminate or hot melt laminate. The method of claim 6, The outer layer is polypropylene resin, polypropylene blend resin, polyethylene resin, polyethylene blend resin. Artificial leather sheet, characterized in that formed of any one material selected from the group consisting of EVA-based resin and EVA blend resin. The method according to any one of claims 1 to 7, wherein Artificial leather sheet, characterized in that the embossing is formed on the surface of the skin layer. The method according to any one of claims 1 to 7, wherein Artificial leather sheet, characterized in that the printed picture on the surface of the outer layer. The method according to any one of claims 1 to 7, wherein Artificial leather sheet, characterized in that the film transferred to the surface of the outer skin layer is adhered by heat or adhesive. The method according to any one of claims 1 to 7, wherein The surface of the outer skin layer is artificial leather sheet characterized in that the coating layer cured by UV (Poly Urethane), acrylic or melamine, etc. is formed. (a) preparing a continuous foamed sheet by degassing by applying heat and pressure to the polyolefin foam sheet to prepare an intermediate layer; (b) preparing an outer film by preparing a film through an extrusion process; (c) adhering an outer skin layer to an upper surface of the intermediate layer; And (d) adhering an inner skin layer made of a nonwoven sheet to an intermediate layer to which the outer skin layer is adhered. The method of claim 12, In the step (a), The polyolefin foam sheet is produced by electron beam crosslinking or chemical crosslinking to a polyolefin foaming agent, and the sheet is heated in an oven, foamed, cooled to room temperature, compressed to decompression by pressing rolls, and the manufacture of artificial leather sheets. Way. The method of claim 13, In the step of heating in the oven, a method of manufacturing artificial leather sheet, characterized in that for 1 to 3 minutes to proceed at a temperature of 180 ℃ to 310 ℃. The method of claim 13, In the process of pressing with the pressing roll, the pressing temperature is maintained at room temperature of 20 ℃ or less, to be pressed to 1/5 than the sum of the thickness of the sheet is added, the pressing rolling speed is characterized in that it is maintained at 10 to 20m / min Method of manufacturing artificial leather sheet. The method of claim 12, The intermediate layer is a method of manufacturing an artificial leather sheet, characterized in that formed of any one material selected from the group consisting of polypropylene resin, polyethylene resin and EVA resin. The method of claim 12, In step (b), Polypropylene resin, polypropylene blend resin, polyethylene resin, polyethylene blend resin. A method of manufacturing an artificial leather sheet, characterized in that the extrusion of any one material selected from the group consisting of EVA-based resin and EVA blend resin by low-temperature extrusion method, but the temperature is maintained at 150 ℃ or less. The method of claim 12, The outer layer and the intermediate layer, the method of manufacturing an artificial leather sheet, characterized in that the adhesive is bonded by a heat laminate, a dry bond laminate or a hot melt laminate. The method of claim 12, The intermediate layer and the endothelial layer is a method of manufacturing artificial leather sheet, characterized in that bonded by a dry bond laminate or hot melt laminate. The method of claim 12, The inner layer is made of a synthetic leather sheet, characterized in that formed of any one material selected from the group consisting of polypropylene nonwoven fabric, polypropylene blend nonwoven fabric, polyethylene nonwoven fabric, polyethylene blend nonwoven fabric, EVA-based nonwoven fabric and EVA blended nonwoven fabric Way. The method according to any one of claims 12 to 20, Passing the artificial leather sheet through the embossing roll to form an embossing on the surface of the outer skin layer comprising the steps of manufacturing artificial leather sheet. The method according to any one of claims 12 to 20, The method of manufacturing an artificial leather sheet, characterized in that it comprises the step of printing a picture on the surface of the skin layer through a gravure printing method. The method according to any one of claims 12 to 20, A method of manufacturing an artificial leather sheet comprising the step of adhering the film transferred to the surface of the outer skin layer with a pressing roll using heat or an adhesive. The method according to any one of claims 12 to 20, Including a UV coating on the surface of the skin layer for mechanical, physical, chemical strengthening, The UV coating method of manufacturing artificial leather sheet, characterized in that the curing using PU, acrylic, melamine and the like.

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