KR102264062B1 - Eco-friendly leather one-stop coating system and the coating method - Google Patents

Abstract

Eco-friendly leather one-stop coating apparatus and coating method of the present invention, the release paper and skin coating line for coating the skin on one side of the release paper and drying the coated skin; It is installed on one side of the release paper and skin coating line, and after applying the water-based adhesive to the graft paper, the water-based adhesive is semi-dried, and the leather and the water-based adhesive are laminated with the semi-dried water-based adhesive and pressed, and the graft paper is peeled off. adhesive application line; a leather and skin happo line installed between the release paper and skin additional coating line and the leather and water-based adhesive application line, and attaching the skin side and the semi-dried water-based adhesive side by synthesizing; It is installed on one side of the leather and skin happo line, and includes a maturation line in which leather and skin are supplied and aged.
Therefore, since the water-based adhesive application process is performed separately from the skin coating process, even if the water-based adhesive is thickly applied to the graft paper, it does not adversely affect the skin and the release paper. Therefore, as a thickly applied water-based adhesive is provided between the yawning leather and the thin skin, damaged parts or tendons appearing on the yawning leather do not stand out on the skin surface. It can be made from leather coated products.

Description

Eco-friendly leather one-stop coating system and the coating method

The present invention relates to an eco-friendly leather one-stop coating device and coating method, and more particularly, it is possible to make high-quality leather coating products using yawn material while using a water-based adhesive which is an eco-friendly adhesive, and an eco-friendly water-based adhesive which is an eco-friendly adhesive It prevents the skin and release paper from being damaged by moisture while using the product, greatly reduces the area of the factory where the coating device will be installed, and enables the administrator to easily manage the entire process of the coating device. It relates to a coating apparatus and a coating method.

Mammalian hides are composed of an epidermis layer, also called a skin, and an endothelium, a dermis layer made of PU. The epidermis layer occupies only about 1% of the total thickness of the leather, and is mainly composed of a protein called protease. The dermal layer consists of fibers composed mainly of collagen, which cross vertically and horizontally to form a fibrous structure. It is divided into a lower layer called the Mangyang layer (網樣層). Before tanning the skin, the epidermis layer is removed along with the hair, and the surface above the papillary layer of the dermis becomes the dermis surface. According to the ups and downs of 溝), it shows the concave and convex shape characteristic of animals.

Cotton leather, which corresponds to the outer skin of animal skins, that is, the epidermis layer, is the best quality leather and is mainly used for expensive products, and the inner skin or PU leather corresponding to the dermis layer corresponds to the lower quality leather.

These low-quality PU leathers are commercialized through a multi-step treatment process as follows.

First, the skin film is coated on the release paper (RP) and dried. The coating thickness of the skin is usually very thin with a thickness of 20 μm. Apply the adhesive over the skin and let it dry. After the adhesive drying process is completed, the leather is attached to the adhesive and aged for a certain period of time in the aging line. After aging, peel the release paper from the leather.

Such a conventional leather coating apparatus has the following problems.

First, a line for coating the skin film on the release paper, a line for drying the coated skin film, a line for applying an adhesive on the skin film, a line for drying the applied adhesive, a line for laminating the leather with the adhesive, , a line for aging the laminated product and a line for peeling the release paper from the leather after aging are arranged in a line and installed.

The length of this whole equipment is about 130-200m. Therefore, the conventional coating device has a very long overall length, so it is very difficult for the operator to manage it while moving along the entire equipment line, and a large site is required to install the long-length equipment, so the construction cost is greatly increased. became

Second, the conventional coating apparatus is a method of directly applying an adhesive on the skin film.

This conventional method has a structure in which an adhesive layer is applied very thinly on the skin, and accordingly, tendons or scratches on the surface of the leather are inevitably exposed to the outside of the skin film.

That is, there is a trend to use an eco-friendly water-based adhesive, which is an eco-friendly adhesive, in order to reduce environmental pollution problems in the leather coating process, and this water-based adhesive has an effect on the skin layer. When the water-based adhesive is applied thickly on the thin skin film, the water-based adhesive is absorbed into the skin layer and adversely affects the pattern formed on the dry skin, resulting in poor aging. Therefore, it is not possible to apply a thick water-based adhesive on the skin film, and the water-based adhesive is applied very thinly to minimize the effect on the skin.

In this way, when the adhesive is applied thinly between the leather and the skin, the damaged parts such as suckers or tendons appearing on the mid-to-low-priced leather are exposed on the skin surface as it is, thereby degrading the quality of the product.

Third, if the water-based adhesive is applied thickly so that the leather suction is not exposed to the skin surface, it not only adversely affects the skin film but also shortens the lifespan of the expensive release paper. Release paper is for forming a pattern on the skin surface, and is relatively expensive. If the aqueous component of the adhesive absorbed into the skin film continuously comes into contact with the release paper, it will affect the pattern formed on the release paper, thereby rapidly shortening the life of the expensive release paper as well as on the surface of the finished product. will affect

Republic of Korea Patent Registration No. 10-1117666

An object of the present invention for solving the above problems is to provide an eco-friendly leather one-stop coating device and a coating method that allows to make high-quality leather coated products using yawn material while using a water-based adhesive, which is an eco-friendly adhesive. have.

Another object of the present invention is to provide an eco-friendly leather one-stop coating device and coating method that prevents the skin from being damaged by moisture while using a water-based adhesive, which is an eco-friendly adhesive, and protects the release paper from moisture.

Another object of the present invention is to provide an eco-friendly one-stop leather coating device and coating method so that the area of the factory where the coating device will be installed is greatly reduced.

Another object of the present invention is to provide an eco-friendly one-stop leather coating device and coating method so that an administrator can easily manage the entire process of the coating device.

Eco-friendly leather one-stop coating device of the present invention for achieving the above object, a release paper and a skin coating line for coating the skin on one side of the release paper and drying the coated skin; a release paper and an additional skin coating line installed on top of the release paper and skin coating line and drying the skin after additionally coating the skin on the first coated skin; It is installed on one side of the release paper and skin coating line, and after applying the water-based adhesive to the graft paper, the water-based adhesive is semi-dried, and the leather and water-based adhesive that is laminated with the semi-dried water-based adhesive is pressed and pressed, and the graft paper is peeled off. adhesive application line; a leather and skin happo line installed between the release paper and skin additional coating line and the leather and water-based adhesive application line, and attaching the skin side and the semi-dried water-based adhesive side by synthesizing; It is characterized in that it is installed on one side of the leather and skin happo line, and includes a maturation line in which the fused leather and skin are supplied and aged.

Another feature of the eco-friendly leather one-stop coating device of the present invention is that the release paper and the skin coating line are installed on one side of the release paper unwinder and the release paper unwinder for which the release paper is wound and the release paper is supplied to the subsequent process. and a first skin coater for coating the skin on one surface of the release paper, and a first skin drying chamber installed on one side of the first skin coater and drying the skin coated on the release paper; The release paper and the skin additional coating line are installed on the upper side of the release paper and the skin coating line and are installed on one side of the second skin coater and the second skin coater is installed on one side of the second skin coater to coat the skin secondly on the first coated skin. A second skin drying chamber for drying the skin, a third skin coater installed on one side of the second skin drying chamber to coat the secondly coated skin tertiarily, and a third skin coater installed on one side of the third skin coater for tertiary coating It consists of a third skin drying chamber for drying the old skin; The leather and water-based adhesive application line consists of a graft paper winder that winds up the graft paper and supplies the graft paper to the subsequent process, and a water-based adhesive coater that is installed on one side of the graft paper winder and applies a water-based adhesive to one side of the graft paper. And, a water-based adhesive drying chamber provided on one side of the water-based adhesive coater and semi-drying the water-based adhesive applied to the graft paper, and a leather supply unit installed on one side of the water-based adhesive drying chamber and supplying leather wound in the form of a plate or a roll And, provided between the leather supply unit and the water-based adhesive drying chamber and for synthesizing the leather and the graft paper coated with the water-based adhesive, and a leather graft paper affixed portion provided on one side of the leather graft paper plywood and pressurizing the combined leather and graft paper It consists of a pressing part and a graft paper winder provided on one side of the pressing part and winding the graft paper peeled from leather and water-based adhesive; The leather and skin synthesizing line consists of a peeling roller and an electric roller, and the leather and graft paper combined with the water-based adhesive are supplied, and a peeling part for peeling the graft paper and winding it on the graft paper winder, the bonding roller and the driving roller It consists of a leather and a thin skin plate coated with leather and a graft paper peeled off, and a happo part, which is laminated by entering, and a guide roller is provided between the driving roller and the electric roller, and it is driven by being fastened to the driving roller, the electric roller, and the guide roller. It is provided with a conveying unit consisting of a conveying belt for conveying the combined leather to the peeling unit and the bonding unit when the roller is driven; The aging line is provided on the second layer between the leather and water-based adhesive application line on the first layer and the release paper and skin additional coating line on the third layer.

Another feature of the eco-friendly leather one-stop coating device of the present invention is that the release paper and skin coating line are installed on the right side of the first floor and arranged so that the flow of work is made from right to left, and the release paper and skin additional coating line are It is installed on the 3rd floor and arranged so that the flow of work is done from right to left, and the leather and water-based adhesive application line is installed in the center on the first floor and arranged so that the flow of work is made from right to left, leather and skin The happo line is installed on the left side of the second floor, and the aging line is installed at the center of the second floor; The release paper and skin coating work starts on the right side of the first floor of the workshop, continues to the release paper and skin additional coating line on the third floor, is transferred to the left side of the third floor, and the water-based adhesive is applied to the graft paper in the center of the first floor. Then, while transporting to the left side of the first floor, the work is done to peel the graft paper after combining the leather and the graft paper, and the release paper and skin transferred to the left of the third floor and the leather coated with water-based adhesive transferred to the left of the first floor After meeting on the left side of the second floor, they are combined, and the combined leather and skin are arranged to be transferred to the aging line in the center of the second floor; It is provided to reduce the length of the entire coating line consisting of a release paper and skin coating line, a release paper and skin additional coating line, a leather and water-based adhesive application line, a leather and skin happo line, and an aging line; The release paper and skin coating line and the leather and water-based adhesive application line are separately separated to prevent damage to the skin film and the release paper by the water component of the water-based adhesive.

Another feature of the eco-friendly leather one-stop coating device of the present invention, the coating thickness of the water-based adhesive is 0.2 ~ 0.3mm.

Eco-friendly leather one-stop coating method of the present invention for achieving the same object as described above, a skin thin film coating step of coating the skin thin film on the release paper; Skin thin film drying step of drying the coated skin thin film after the skin thin film coating step; A water-based adhesive application step of applying a water-based adhesive to the waterproof coating surface of the graft paper after the skin thin film drying step; Water-based adhesive semi-drying step of semi-drying the applied water-based adhesive after the water-based adhesive application step; After the semi-drying step of the water-based adhesive, a leather grafting paper bonding step of bonding the water-based adhesive side and the leather of the graft paper; Leather graft paper pressing step of pressing the combined leather and graft paper after the leather graft paper bonding step; After the pressing step of the leather graft paper, when the water-based adhesive of the graft paper is attached to the leather, the graft paper peeling step of peeling the graft paper from the water-based adhesive; After the graft paper peeling step, the leather skin synthesizing step of synthesizing and pressing the water-based adhesive side of the leather and the skin thin film side of the release paper so that the skin thin film is attached to the water-based adhesive; A leather skin aging step in which the attached leather, water-based adhesive skin, and release paper are put into an aging line after the leather skin fusion step; It consists of a release paper peeling step of peeling a release paper from a aged product after the leather skin aging step; The process of coating the skin on the release paper and the process of applying the water-based adhesive to the leather are separated and each is made in a separate work line, and the semi-dried water-based adhesive is applied to the leather and then attached to the skin surface. It is characterized in that it prevents the skin and release paper from being damaged by the water component.

The present invention as described above is a process of coating a skin on a release paper, a process of applying a thick water-based adhesive to a silicone-coated graft paper, semi-drying, attaching the semi-dried water-based adhesive to the leather, and then peeling the graft paper are performed separately for each. Then, the product is made by combining the release paper and the leather so that the skin surface and the water-based adhesive surface are in contact. Therefore, since the water-based adhesive application process, which is an eco-friendly adhesive, is performed separately from the skin coating process, even if the water-based adhesive is thickly applied to the graft paper, it does not adversely affect the skin and the release paper. Therefore, as a thickly applied water-based adhesive is provided between the yawning leather and the thin skin, damaged parts or tendons appearing on the yawning leather do not stand out on the skin surface. It can be made from leather coated products.

In addition, the present invention separates the process of coating the skin on the release paper, applying a thick water-based adhesive to the silicone-coated graft paper to semi-dry it, attaching the semi-dried water-based adhesive to the leather, and then peeling the graft paper separately, respectively. carry out Therefore, since the water-based adhesive application process, which is an eco-friendly adhesive, is performed separately from the skin coating process, even if the water-based adhesive is thickly applied to the graft paper, it does not adversely affect the skin and the release paper. Therefore, it is possible to prevent the skin from being damaged by moisture while using the water-based adhesive, which is an eco-friendly adhesive, and to protect the expensive release paper from moisture.

And, in the present invention, the release paper and skin coating line are installed on the right side of the first floor and arranged so that the flow of work is made from right to left, and the release paper and skin additional coating line are installed on the third floor and run from right to left The work flow is arranged, and the leather and water-based adhesive application line is installed in the center on the first floor and arranged so that the work flow is made from right to left, and the leather and skin happo line is installed on the left side of the second floor, The aging line is installed in the middle of the second floor in a zigzag form. Therefore, since the overall length of the coating apparatus is greatly reduced, the area of the factory in which the coating apparatus of the present invention will be installed is greatly reduced, so that the incidental cost is reduced, and the manager can easily manage the entire process of the coating apparatus.

In addition, the coating thickness of the water-based adhesive is 0.2 ~ 0.3mm. If the application thickness of the water-based adhesive is less than 0.2mm, the thickness of the adhesive layer between the leather and the skin layer is not sufficiently secured, and the damaged part of the leather is exposed as it is on the skin surface. Since the thickness is unnecessarily thick, materials are wasted and the drying time of the water-based adhesive is increased, resulting in problems such as increased coating operation time. In addition, due to poor aging, adhesion failure occurs, flexibility of the finished product is reduced and hardened, and problems occur during cutting and sewing. Therefore, the coating thickness of the water-based adhesive applied to the graft paper is preferably 0.2 ~ 0.3mm.

1 is a schematic view showing an eco-friendly leather one-stop coating device of the present invention
Figure 2 is a partially enlarged view of Figure 1
Figure 3 is a flow chart showing the eco-friendly leather one-stop coating device of the present invention
4 is a schematic cross-sectional view showing the application nozzles used in the first skin coater, the second skin coater, and the third skin coater;

Specific features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings.

1 is a schematic diagram showing an eco-friendly one-stop coating apparatus for leather of the present invention, FIG. 2 is a partial enlarged view of FIG. 1, and FIG. 3 is a flowchart showing an environment-friendly leather one-stop coating apparatus of the present invention.

The present invention is a release paper and skin coating line (10), a release paper and skin additional coating line (20), a leather and water-based adhesive application line (30), a leather and skin happo line (50), and an aging line (60). made including

In the release paper and skin coating line 10 , the skin 13 is coated on one surface of the release paper 11 and the coated skin 13 is dried.

The release paper and skin coating line 10 includes a release paper unwinder 12 in which a release paper 11 is wound and supplying a release paper 11 to a subsequent process, and a release paper unwinder 12 on one side. A first skin coater 14 installed on one side of the release paper 11 and coating the skin 13 on one side of the release paper 11, and a skin 13 installed on one side of the first skin coater 14 and coated on the release paper 11 It consists of a first skin drying chamber 15 for drying.

The release paper and skin additional coating line 20 is installed on top of the release paper and skin coating line 10 and the skin 13 is additionally coated on the primary coated skin 13 and then dried.

The release paper and skin additional coating line 20 is a second skin coater that is installed on the upper side of the release paper and skin coating line 10 and coats the skin 13 secondarily on the first coated skin 13 . (21), a second skin drying chamber 22 installed on one side of the second skin coater 21 and drying the secondary coated skin 13, and a second skin drying chamber 22 installed on one side of the 2 A third skin coater 23 for coating the skin 13 tertiarily on the car-coated skin 13, and a third installed on one side of the third skin coater 23 and drying the tertiarily coated skin 13 It consists of a skin drying chamber (24).

The leather and water-based adhesive application line 30 is installed on one side of the release paper and skin coating line 10, and after applying the water-based adhesive 33 to the graft paper 31, the water-based adhesive 33 is semi-dried. , the leather 36 is laminated to the semi-dried water-based adhesive 33 and pressed, and the graft paper 31 is peeled off.

Here, the leather 36 refers to leather, artificial leather, or synthetic fibers.

This leather and water-based adhesive application line 30, the graft paper 31 is wound and the graft paper 31 is supplied to the subsequent process, the graft paper winder 32, and the graft paper winder 32. A water-based adhesive coater 34 installed on one side and applying a water-based adhesive 33 to one surface of the graft paper 31, and a water-based adhesive 33 provided on one side of the water-based adhesive coater 34 and applied to the graft paper 31 A water-based adhesive drying chamber 35 for semi-drying, and a leather supply unit 37 that is installed on one side of the water-based adhesive drying chamber 35 and supplies the leather 36 in the form of a plate or the leather 36 wound in the form of a roll and , provided between the leather supply unit 37 and the water-based adhesive drying chamber 35 and for bonding the leather 36 and the graft paper 31 coated with the water-based adhesive 33 to the leather graft paper unit 38 and the leather A pressing unit 39 provided on one side of the graft paper bonding cloth part 38 and pressing the bonded leather 36 and graft paper 31, and the pressing unit 39 provided on one side of the leather 36 and water-based adhesive ( 33) consists of a graft paper winder 40 for winding the peeled graft paper 31.

The leather and skin happo line 50 is installed between the release paper and skin additional coating line 20 and the leather and water-based adhesive application line 30, the skin 13 side and the semi-dried water-based adhesive 33 side are combined and attached.

The leather and skin synthesizing line 50 includes a peeling unit 51 , a synthesizing unit 54 , and a transfer unit 57 . The peeling part 51 is composed of a peeling roller 52 and an electric roller 53, and the leather 36 and the graft paper 31 that are joined by the water-based adhesive 33 are supplied, and the graft paper 31 is peeled off. to be wound on the graft paper winder (40). The plywood unit 54 is composed of a plywood roller 55 and a driving roller 56, and the leather 36 from which the graft paper 31 is peeled and the release paper 11 coated with the skin 13 thin plate enter it. are merged The transfer unit 57 is provided with a guide roller 58 between the driving roller 56 and the electric roller 53, and is fastened to the driving roller 56, the electric roller 53, and the guide roller 58, so that the driving roller ( 56) is composed of a conveying belt 59 that allows the leather 36 to be transferred to the peeling unit 51 and the synthesized unit 54 when the leather 36 is driven.

The aging line 60 is installed on one side of the leather and skin happo line 50 so that the fused leather 36 and skin 13 are supplied and aged.

This aging line 60 is provided on the second layer between the leather and water-based adhesive application line 30 of the first layer and the release paper and skin additional coating line 20 of the third layer, and the aging line provided on the second layer ( 60) is provided in a zigzag form so that the entire length of the aging line 60 is extended, rather than being provided in one long line along the horizontal direction.

One side of the aging line 60 is further provided with a cooling roller 70 , a leather loading table 100 , and a release paper winder 80 .

The cooling roller 70 is installed on one side of the aging line 60 so that the leather 36 product passing through the aging line is cooled while passing.

The leather loading table 100 is installed on one side of the cooling roller 70 and leather products made of leather 36 in a state in which the release paper 11 is peeled, water-based adhesive 33, and skin 13 are loaded. .

The release paper winder 80 is installed on one side of the leather loading table 100 so that the release paper 11 peeled from the leather product is wound.

A product winder 90 may be further provided between the leather loading table 100 and the release paper winder 80 . The leather product from which the release paper 11 is peeled may be loaded on the leather loading table 100 or may be wound on the product winder 90 .

In the eco-friendly leather one-stop coating device of the present invention, the release paper and skin coating line (10) are installed on the right side of the first floor and arranged so that the flow of work is made from right to left, and the release paper and skin additional coating line (20) ) is installed on the third floor and arranged so that the flow of work is made from right to left, and the leather and water-based adhesive application line 30 is installed in the center on the first floor and arranged so that the flow of work is made from right to left The leather and skin happo line 50 is installed on the left side of the second floor, and the aging line 60 is installed on the center of the second floor.

In the present invention, the release paper 11 and skin 13 coating operation starts on the right side of the first floor of the workshop and is transferred to the left side of the third floor after the release paper and skin additional coating line 20 on the third floor, 1 After applying the water-based adhesive 33 to the graft paper 31 in the center of the layer, the leather 36 and the graft paper 31 are combined and then the graft paper 31 is peeled off while being transferred to the left side of the first floor. The operation is made, and the release paper 11 and skin 13 transferred to the left of the third floor and the leather 36 coated with the water-based adhesive 33 transferred to the left of the first floor meet on the left side of the second floor and are combined, The combined leather 36 and skin 13 are arranged to be transferred to the aging line 60 in the center of the second floor.

Therefore, the whole consisting of a release paper and skin coating line 10, a release paper and skin additional coating line 20, a leather and water-based adhesive application line 30, a leather and skin happo line 50, and an aging line 60 It is provided so that the length of the coating line is reduced.

In addition, the release paper and skin coating line 10 and the leather and water-based adhesive application line 30 are separately separated, so that the skin 13 film and the release paper 11 are separated by the water component of the water-based adhesive 33. It is provided to prevent damage.

On the other hand, the coating thickness of the water-based adhesive 33 applied to the graft paper 31 is 0.2 to 0.3 mm.

If the coating thickness of the water-based adhesive 33 is less than 0.2 mm, the coating thickness of the water-based adhesive 33 cannot be sufficiently secured, so that the tendons or scratches on the leather surface are exposed to the outside of the skin film as it is. Therefore, if the coating thickness of the water-based adhesive 33 is less than 0.2mm, it is impossible to manufacture high-quality leather.

When the coating thickness of the water-based adhesive 33 exceeds 0.3 mm, the thickness of the water-based adhesive 33 is unnecessarily thick, so material is wasted, and the water-based adhesive 33 drying time is increased, so the coating operation time increases. is brought about In addition, due to poor aging, adhesion failure occurs, flexibility of the finished product is reduced and hardened, and problems occur during cutting and sewing. Therefore, the coating thickness of the water-based adhesive 33 applied to the graft paper 31 is preferably 0.2 to 0.3 mm.

The coating method by the eco-friendly leather one-stop coating device of the present invention is as follows.

First, it has a skin thin film coating step (S10) (S30) (S50) of coating the skin 13 thin film on the release paper 11.

After the skin thin film coating step (S10), there is a skin thin film drying step (S20) (S40) (S60) of drying the coated skin 13 thin film.

The skin thin film coating and drying may be performed only once by the release paper and the skin coating line 10 , but may be made several times by the release paper and the skin additional coating line 20 . Coating and drying of such a skin thin film proceeds as follows.

When the release paper 11 is drawn out from the release paper unwinder 12, it is supplied to the first skin coater 14, and the skin 13 is first coated on one surface of the release paper 11 (S10). The release paper 11 on which the skin 13 is first coated is supplied to the first skin drying chamber 15 and first dried (S20).

The primarily dried release paper 11 and skin 13 are supplied to the second skin coater 21, and the skin 13 is secondarily coated in the second skin coater 21 (S30). The release paper 11 on which the skin 13 is secondarily coated is supplied to the second skin drying chamber 22 to be secondarily dried (S40).

The secondly dried release paper 11 and skin 13 are supplied to the third skin coater 23, and the skin 13 is thirdly coated in the third skin coater 23 (S50). The release paper 11 on which the skin 13 is tertiarily coated is supplied to the third skin drying chamber 24 and is tertiarily dried (S60).

After the skin thin film tertiary drying step (S60), a water-based adhesive application step (S70) of applying the water-based adhesive 33 to the waterproof coating surface of the graft paper 31 is performed.

The water-based adhesive application step (S70) may proceed after the skin 13 is coated on the release paper 11 and dried, but may be performed while the skin 13 is coated and dried in one line.

In the water-based adhesive application step (S70), when the graft paper 31 is withdrawn from the graft paper winder 32, it is supplied to the water-based adhesive coater 34 so that the water-based adhesive 33 is applied. The coating thickness of the water-based adhesive 33 applied to the graft paper 31 is 0.2 to 0.3 mm.

The coating thickness of the water-based adhesive 33 is very important. One of the features of the present invention is to ensure the quality of high-quality leather even with low-quality leather. If the coating thickness of the water-based adhesive 33 is less than 0.2 mm, the coating thickness of the water-based adhesive 33 cannot be sufficiently secured, so that the tendons or scratches on the leather surface are exposed to the outside of the skin film as it is. Therefore, if the coating thickness of the water-based adhesive 33 is less than 0.2mm, it is impossible to manufacture high-quality leather products. When the coating thickness of the water-based adhesive 33 exceeds 0.3 mm, the thickness of the water-based adhesive 33 is unnecessarily thick, so material is wasted and the water-based adhesive 33 drying time is increased, so the overall manufacturing operation time is increased. is brought about Therefore, the coating thickness of the water-based adhesive 33 applied to the graft paper 31 is preferably 0.2 to 0.3 mm.

After the water-based adhesive application step (S70), there is a semi-drying step (S80) of the water-based adhesive to semi-dry the applied water-based adhesive (33).

The water-based adhesive semi-drying step (S80) is made by the water-based adhesive drying chamber (35). After the water-based adhesive 33 is applied to the graft paper 31 , the water-based adhesive 33 applied to the graft paper 31 is semi-dried while passing through the water-based adhesive drying chamber 35 .

After the water-based adhesive semi-drying step (S80), there is a leather graft paper bonding step (S90) in which the water-based adhesive 33 side of the graft paper 31 and the leather 36 are combined.

The leather graft paper bonding step (S90) is made by bonding the leather 36 to the graft paper 31 coated with the water-based adhesive 33 that has passed through the water-based adhesive drying chamber 35. The leather 36 supplied from the leather supply unit 37 is combined with the graft paper 31 that has passed through the water-based adhesive drying chamber 35, and the semi-dried water-based adhesive 33 is added to the leather 36 through this bonding process. is attached

There is a leather graft paper pressing step (S100) of pressing the leather 36 and the graft paper 31 that are combined after the leather graft paper bonding step (S90).

The leather graft paper pressing step (S100) is made while the leather 36, the water-based adhesive 33, and the graft paper 31 are passed through the pressing unit 39. The pressing unit 39 may include a driving roller and a pressing roller that is elastically closely attached to the driving roller and rotates idly, and the leather 36 and graft paper 31 are pressed while passing between the driving roller and the pressing roller. It can be provided as much as possible.

When the water-based adhesive 33 of the graft paper 31 is attached to the leather 36 after the leather graft paper pressing step (S100), the graft paper peeling step (S110) of peeling the graft paper 31 from the water-based adhesive 33 is performed have

The graft paper 31 peeled off in the graft paper peeling step (S110) is wound on the graft paper winder 40, and the leather 36 product to which the water-based adhesive 33 is attached is transferred to the next process.

After the graft paper peeling step (S110), the water-based adhesive 33 side of the leather 36 and the skin 13 thin film side of the release paper 11 are combined and pressed so that the skin 13 thin film is attached to the water-based adhesive 33 It has a leather skin fusion step (S120) to make it possible.

The leather skin synthesizing step (S120) is made in the peeling unit 51 , the synthesizing unit 54 , and the transfer unit 57 .

The peeling unit 51 includes a peeling roller 52 and an electric roller 53 . While the leather 36 and the skin 13 are passed through the peeling unit 51 in a combined state, the graft paper 31 is wound by the graft paper winder 40 via the peeling roller 52 .

The leather 36 from which the graft paper 31 has been peeled is transferred along the transfer belt 59 of the transfer unit 57 and supplied to the plywood unit 54, and the release paper 11 to which the skin is applied is also transferred to the plywood unit 54. It is supplied as a plywood of the plywood unit 54 with the water-based adhesive 33 applied to the leather 36 in a semi-dried state and the dried skin 13 surface applied to the release paper 11 in contact with each other. It is combined while passing through the roller 55 and the driving roller 56 .

After the leather skin bonding step (S120), the leather 36 in the attached state, the water-based adhesive 33, the skin 13, and the release paper 11 are put into the aging line 60 to mature the leather skin aging step (S130). have

The leather skin aging step (S130) may be performed while the combined leather 36 and the release paper 11 are transported along the conveyor in the sealed chamber.

These aging lines 60 may be provided in a long line along the horizontal direction, but if they are arranged in a zigzag form, the entire length of the aging line 60 may be arranged as long as possible in a limited space.

After the leather skin aging step (S130), there is a release paper peeling step (S140) of peeling the release paper 11 from the aged product.

The release paper peeling step (S140) is a step of peeling the release paper 11 from the product that has passed the aging line 60, and the peeled release paper 11 is wound on the release paper winder 80, and the release paper (11) The peeled leather 36 product is cooled while passing through the cooling roller 70 and then loaded on the leather loading table 100 or wound on the product winder 90.

The cooling roller 70 may be provided as a water cooling roller. A cooling water line is formed in the water cooling roller so that the cooling water is circulated inside the roller, and a plurality of such water cooling rollers may be arranged. The product aged in the aging line 60 is cooled while passing in contact with a plurality of cooling rollers 70 , and the cooled leather 36 product is wound on the leather loading table 100 or the product winder 90 .

In the eco-friendly leather one-stop coating method of the present invention, the process of coating the skin 13 on the release paper 11 and the process of applying the water-based adhesive 33 to the leather 36 are separated, so that each is performed in a separate work line. Since the semi-dried water-based adhesive 33 is applied to the leather 36 and then attached to the surface of the skin 13, the skin 13 and the release paper 11 by the water component of the water-based adhesive 33 prevent it from being damaged.

As described above, the eco-friendly leather one-stop coating apparatus and coating method of the present invention have the following effects.

First, in the present invention, the process of coating the skin 13 on the release paper 11, and semi-drying the water-based adhesive 33 by thickly applying the water-based adhesive 33 to the silicone-coated graft paper 31, and the semi-drying the water-based adhesive 33 ) is attached to the leather 36, and then the process of peeling the graft paper 31 is separately performed. Then, the release paper 11 and the leather 36 are combined so that the skin 13 side and the water-based adhesive 33 side come into contact with each other to make a product.

Therefore, since the water-based adhesive 33, an eco-friendly adhesive, is applied separately from the skin 13 coating process, even if the water-based adhesive 33 is thickly applied to the graft paper 31, the skin 13 and the release paper 11 does not adversely affect

Therefore, since the thickly applied water-based adhesive 33 is provided between the leather 36 of the yawn material and the skin 13 of the thin film material, damaged parts or tendons appearing on the leather 36 of the yawn material stand out on the skin 13 surface. It does not lose, and accordingly, it is possible to make a high-quality leather coating product using the leather 36 of the yawn material.

Second, the present invention is a process of coating the skin 13 on the release paper 11, and semi-drying by applying a thick water-based adhesive 33 to the silicone-coated graft paper 31 and semi-drying the water-based adhesive 33 After attaching to the leather 36, the process of peeling the graft paper 31 is separately performed.

Therefore, since the water-based adhesive 33, an eco-friendly adhesive, is applied separately from the skin 13 coating process, even if the water-based adhesive 33 is thickly applied to the graft paper 31, the skin 13 and the release paper 11 It has no adverse effect on moisture. Therefore, it is possible to prevent the skin 13 from being damaged by moisture while using the water-based adhesive 33 which is an eco-friendly adhesive, and to protect the expensive release paper 11 from moisture.

Third, in the present invention, the release paper and skin coating line 10 is installed on the right side of the first floor and arranged so that the flow of work is made from right to left, and the release paper and skin additional coating line 20 are installed on the third floor and is arranged so that the flow of work is made from right to left, and the leather and water-based adhesive application line 30 is installed in the center on the first floor and arranged so that the flow of work is made from right to left, leather and skin fusion The line 50 is installed on the left side of the second floor, and the aging line 60 is installed in the center of the second floor in a zigzag form.

Therefore, since the overall length of the coating apparatus is greatly reduced, the area of the factory in which the coating apparatus of the present invention will be installed is greatly reduced, so that the incidental cost is reduced, and the manager can easily manage the entire process of the coating apparatus.

Fourth, the coating thickness of the water-based adhesive 33 is 0.2 ~ 0.3mm. If the coating thickness of the water-based adhesive 33 is less than 0.2 mm, the thickness of the adhesive layer between the leather 36 and the skin 13 layer is not sufficiently secured, so that the damaged portion of the leather 36 is exposed as it is on the skin surface. If the coating thickness of the water-based adhesive 33 exceeds 0.3 mm, the thickness of the water-based adhesive 33 is unnecessarily thick, so material is wasted, and the water-based adhesive 33 drying time is increased, so the coating operation time increases. is brought about In addition, due to poor aging, adhesion failure occurs, flexibility of the finished product is reduced and hardened, and problems occur during cutting and sewing. Therefore, the coating thickness of the water-based adhesive 33 applied to the graft paper 31 is preferably 0.2 to 0.3 mm.

On the other hand, the surface of the skin 13 of the coated leather, which is the finished product according to the present invention, may be coated with an antifouling coating layer made of an antifouling coating composition to effectively achieve adhesion prevention and removal of contaminants.

The antifouling coating composition contains amphodiglycinate and sorbitol ester in a molar ratio of 1:0.01 to 1:2, and the total content of amphodiglycinate and sorbitol ester is 1 to 10% by weight based on the total aqueous solution. to be.

The amphodiglycinate and sorbitol ester preferably have a molar ratio of 1:0.01 to 1:2, and when the molar ratio is out of the above range, the applicability of the skin 13 surface decreases or moisture adsorption on the surface after application increases. Therefore, there is a problem that the coating film is removed.

The amphodiglycinate and sorbitol ester is preferably 1 to 10% by weight in the aqueous solution of the entire composition, and when it is less than 1% by weight, there is a problem in that the applicability of the skin 13 surface is reduced, and when it exceeds 10% by weight, the application Crystal precipitation is likely to occur due to an increase in the film thickness.

On the other hand, as a method of applying the present antifouling coating composition to the surface of the skin 13, it is preferable to apply by a spray method. In addition, the final coating film thickness on the surface of the skin 13 is preferably 500 to 2000 angstroms, more preferably 1000 to 2000 angstroms. If the thickness of the coating film is less than 500 Å, there is a problem of deterioration in the case of high-temperature heat treatment, and if it exceeds 2000 Å, there is a disadvantage that crystal precipitation on the coated surface is easy to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of amphodiglycinate and 0.05 mol of sorbitol ester to 1000 ml of distilled water and then stirring.

In addition, the surface of the skin 13 of the coated leather, which is the finished product according to the present invention, may be coated with a fragrance material having a sterilization function, and accordingly, the effect such as sterilizing the coated leather and relieving the stress of the worker can get

Functional oil may be mixed with the fragrance material, and the mixing ratio is 95 to 97% by weight of the functional oil mixed with 95 to 97% by weight of the fragrance material, and the functional oil is 50% by weight of Ravensara oil %, and 50% by weight of rosehip oil.

Here, the functional oil is preferably mixed in an amount of 3 to 5% by weight with respect to the fragrance. When the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant, and when the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function is not significantly improved, while the manufacturing cost is greatly increased.

The main chemical components of Ravensara oil are cineol and pinene, and have good effects on respiratory diseases and stress relief.

Rosehip oil is effective in treating skin diseases, sterilizing, relieving itching, clearing the head, and relieving tension.

The reason why the components and ratios are numerically limited, the present inventors repeatedly failed several times and analyzed through test results, showing the optimal effect in the components and ratios.

Since this functional oil is coated on the skin 13 surface of the coated leather, which is the finished product according to the present invention, excellent effects such as sterilizing the coated leather and relieving the stress of the worker can be obtained.

And in the aqueous adhesive 33 of the present invention, 70 mol% of terephthalic acid and 30 mol% of phthalic anhydride are dicarboxylic acid components, and 75 mol% of the diol component is based on the moles of dicarboxylic acid units constituting the copolymerized polyester. It may consist of an adhesive obtained by polycondensation by adding a trimellitic acid component of 40 to 400 ppm based on the weight of the polyester in a reaction system configured to consist of ethylene glycol and 25 mol% of diethylene glycol.

The dicarboxylic acid component constituting the copolymer polyester of the present invention is a mixture of terephthalic acid, phthalic anhydride and their ester-forming derivatives, 70 mol% of the dicarboxylic acid component is a terephthalic acid component, and 30 mol% is a phthalic anhydride component .

The reason why the composition ratio of terephthalic acid and phthalic anhydride is limited to the above range is to satisfy the adhesive performance of the obtained polymer.

In the present invention, if the content of phthalic anhydride is less than 30 mol%, crystals are formed in the prepared co-polyester, and as the softening temperature increases, it causes an increase in the processing temperature, and when the content of phthalic anhydride exceeds 30 mol% The softening temperature lowering effect becomes weak and causes deterioration of the physical properties of the co-polyester.

In addition, in the present invention, the composition ratio of the diol component is formed so that 75 mol% is an ethylene glycol component and 25 mol% is a diethylene glycol component based on the mole of the dicarboxylic acid unit.

The reason for limiting the composition ratio of ethylene glycol to diethylene glycol within this range is to satisfy the softening temperature, adhesive performance, and processability of the obtained polymer.

In the present invention, when the content of diethylene glycol is less than 25 mol%, the desired performance cannot be exhibited, and when it exceeds 25 mol%, the softening start temperature of the copolymerized polyester is too low to less than 60° C., so it is difficult to use.

The reason for limiting the addition amount of the trimellitic acid polyfunctional component to the above range is to improve color defects by reducing the reaction temperature and shortening the reaction time during polycondensation of the adhesive according to the present invention, and at the same time work during spinning and stretching. is to improve performance.

In the present invention, when the addition amount of the polyfunctional trimellitic acid component is less than 40 ppm, it is insufficient to serve as the desired crosslinking agent, and when the addition amount of the polyfunctional component exceeds 400 ppm, on the contrary, during polymerization, spinning and stretching due to rapid crosslinking phenomenon Because it can cause problems.

In addition, the raw material content ratio of the peeling roller 52 may be made by mixing 60% by weight of rubber, 33 to 36% by weight of carbon black, 2 to 5% by weight of antioxidant, and 1 to 3% by weight of sulfur as an accelerator.

Carbon black is to increase abrasion resistance, so it is added, but if the content is less than 33% by weight, elasticity and abrasion resistance are reduced, and if it exceeds 36% by weight, the content of the rubber, the main component, is relatively small, so there is a risk of lowering the elasticity , 33 to 36% by weight are mixed.

Antioxidant is to select 3C (N-PHENYL-N'-ISOPROPYL- P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) to add 2 to 5% by weight, 2 If it is less than % by weight, the product is easily oxidized, and if it is added too much and exceeds 5% by weight, the content of rubber, which is the main component, is relatively small, and there is a risk that the elasticity may be lowered, and also because the price of the antioxidant is expensive 2 ~5% by weight is appropriate.

Sulfur as an accelerator is mixed in an amount of 1 to 3% by weight. If less than 1% by weight, since the vulcanization effect is insignificant in the heating process during molding, 1% by weight or more is added. When it exceeds 3% by weight, the content of the rubber, which is the main component, is relatively small and there is a risk that the elasticity may be lowered, so 1 to 3% by weight is appropriate.

Therefore, since the present invention is reinforced with synthetic rubber having elasticity in various directions, the elasticity, toughness and rigidity of the peeling roller 52 are increased, so that durability is improved, and thus the life of the peeling roller 52 is increased.

In addition, in the method of coating the skin 13 on the graft paper 31 in the first skin coater 14, the second skin coater 21, and the third skin coater 23, an application roller (not shown) is used. Thus, it may be applied to the graft paper 31, or may be applied by spraying the liquid of the skin 13 onto the graft paper 31 with the application nozzle 62 as shown in FIG.

The application nozzle 62 is a means for rotating the sprayed skin 13 while strengthening the spraying force of the skin 13, and a spiral part 64 is formed at the upper end thereof to be fastened with a skin supply hose (not shown), A hollow and conical body portion 65 is integrally formed below it from the spiral portion 64, and the body portion 65 has a plurality of holes through which air is finally sprayed along the spiral direction. The skin injection hole 66 is formed through.

In addition, on the outer surface of the body portion 65, a helical skin inner groove 68 that coincides with the skin injection holes 66 arranged in the spiral direction is formed, and the skin inner groove 68 is formed with the skin injection hole 66. ) serves to form a vortex by guiding the injection direction of the skin 13 injected from the helical direction.

Accordingly, the skin 13 sprayed through the skin injection hole 66 of the application nozzle 62 and the helical skin movement guide groove 68 rotates and is sprayed on the release paper 11 while forming a vortex to release, It is sprayed evenly on the paper 11 as well as quickly sprayed.

10 : Release paper and skin coating line
11: Release Paper 12: Release Paper Unwinder
13: skin 14: first skin coater
15: first skin drying chamber
20: Release paper and skin additional coating line
21: second skin coater 22: second skin drying chamber
23: third skin coater 24: third skin drying chamber
30: leather and water-based adhesive application line
31: Graft paper 32: Graft paper winder
33: water-based adhesive 34: water-based adhesive coater
35: water-based adhesive drying chamber 36: leather
37: leather supply part 38: leather graft paper plywood part
39: pressurizing part 40: graft paper winder
50: leather and skin happo line
51: peeling part 52: peeling roller
53: electric roller 54: happo part
55: happo roller 56: driving roller
57: transfer unit 58: guide roller
59: transport belt
60: aging line
70: cooling roller
80: release paper winder
90: product winding machine
100: leather loading stand

Claims (5)

a release paper and a skin coating line 10 for coating the skin 13 on one surface of the release paper 11 and drying the coated skin 13;
a release paper and skin additional coating line 20 installed on the release paper and skin coating line 10 and additionally coated with a skin 13 on the first coated skin 13 and then dried;
It is installed on one side of the release paper and skin coating line 10, and after applying the water-based adhesive 33 to the graft paper 31, the water-based adhesive 33 is semi-dried, and the semi-dried water-based adhesive 33 is applied to the leather. The leather and water-based adhesive application line 30 for pressing and pressing after the (36), and peeling the graft paper (31);
A leather and skin combination line installed between the release paper and skin additional coating line 20 and the leather and water-based adhesive application line 30, and attaching the skin 13 side and the semi-dried water-based adhesive 33 side by synthesizing and attaching it (50);
Eco-friendly leather one-stop coating device, characterized in that it is installed on one side of the leather and skin happo line (50) and includes a maturation line (60) in which the fused leather (36) and the skin (13) are supplied and aged.
The method according to claim 1,
Release paper and skin coating line (10),
A release paper unwinder 12 in which the release paper 11 is wound and supplying the release paper 11 to the subsequent process, and the release paper unwinder 12 are installed on one side of the release paper 11 and have a skin ( 13) is composed of a first skin coater 14 for coating, and a first skin drying chamber 15 installed on one side of the first skin coater 14 and drying the skin 13 coated on the release paper 11. under;
Release paper and skin additional coating line (20),
A second skin coater 21 installed on the upper side of the release paper and skin coating line 10 and secondarily coating the skin 13 on the first coated skin 13, and the second skin coater 21 one side The second skin drying chamber 22 is installed in and dried the secondary coated skin 13, and the second skin drying chamber 22 is installed on one side of the second skin drying chamber 22 and is installed in the secondary coated skin 13 to the third skin 13 ) comprising a third skin coater 23 for coating, and a third skin drying chamber 24 installed on one side of the third skin coater 23 and drying the tertiarily coated skin 13;
The leather and water-based adhesive application line 30 is,
The graft paper 31 is wound and the graft paper 31 is installed on one side of the graft paper winder 32 and the graft paper winder 32 so that the graft paper 31 is supplied to the subsequent process, and the graft paper 31 is water-based on one side. A water-based adhesive coater 34 for applying the adhesive 33, a water-based adhesive drying chamber 35 provided on one side of the water-based adhesive coater 34 and semi-drying the water-based adhesive 33 applied to the graft paper 31, and , a leather supply unit 37 installed on one side of the water-based adhesive drying chamber 35 and supplying the leather 36 in the form of a plate or the leather 36 wound in the form of a roll, the leather supply unit 37 and the water-based adhesive drying chamber ( 35) provided between the leather 36 and the graft paper 31 to which the water-based adhesive 33 is applied, the leather graft paper cloth part 38 and the leather graft paper cloth part 38 are provided on one side and are made of plywood. The pressing part 39 for pressing the leather 36 and the graft paper 31 and the pressing part 39 are provided on one side and the graft paper 31 peeled from the leather 36 and the water-based adhesive 33 is wound. Shaking is made of a graft paper winder (40);
Leather and skin happo line (50),
It consists of a peeling roller 52 and an electric roller 53, and the leather 36 and the graft paper 31 are supplied, which are laminated by an aqueous adhesive 33, and a graft paper winder 40 by peeling the graft paper 31. ), a release paper consisting of a peeling part 51, a plywood roller 55 and a driving roller 56, and a leather 36 and a skin 13 coated with a thin plate of the graft paper 31 peeled off ( 11) is provided with a guide roller 58 between the happo part 54, which is entered and affixed, and the driving roller 56 and the electric roller 53, and the driving roller 56, the electric roller 53, the guide roller ( 58) is provided with a conveying unit 57 comprising a conveying belt 59 which is fastened to the driving roller 56 and allows the leather 36 to be conveyed to the peeling unit 51 and the bonding unit 54 when the driving roller 56 is driven;
The aging line 60 is,
Eco-friendly leather one-stop coating device, characterized in that it is provided on the second layer between the leather and water-based adhesive application line (30) of the first layer and the release paper and skin additional coating line (20) of the third layer.
The method according to claim 1,
The release paper and skin coating line 10 is installed on the right side of the first floor and arranged so that the flow of work is made in the right to left direction, and the release paper and skin additional coating line 20 is installed on the third floor and is directed from right to left is arranged so that the flow of work is made, and the leather and water-based adhesive application line 30 is installed in the center on the first floor and arranged so that the flow of work is made from right to left, and the leather and skin happo line 50 is It is installed on the left side of the second floor, and the aging line 60 is installed in the center of the second floor;
The release paper 11 and skin 13 coating operation starts on the right side of the 1st floor of the workshop and is transferred to the 3rd floor after the release paper and skin additional coating line 20 is transferred to the left side of the 3rd floor, and the graft paper After the operation of applying the water-based adhesive 33 to the 31 is made, the leather 36 and the graft paper 31 are laminated while being transferred to the left side of the first floor, and then the graft paper 31 is peeled off, The release paper 11 and skin 13 transferred to the left of the third floor and the leather 36 coated with the water-based adhesive 33 transferred to the left of the first floor met on the left side of the second floor and then combined, the combined leather 36 ) and the skin 13 are arranged to be transferred to the aging line 60 in the center of the second floor;
A full coating line consisting of a release paper and skin coating line (10), a release paper and skin additional coating line (20), a leather and water-based adhesive application line (30), a leather and skin happo line (50), and an aging line (60) is provided so that the length of the is reduced;
The release paper and skin coating line 10 and the leather and water-based adhesive application line 30 are separately separated, so that the skin 13 film and the release paper 11 are damaged by the water component of the water-based adhesive 33 Eco-friendly leather one-stop coating device, characterized in that provided to block it.
The method according to claim 1, The coating thickness of the water-based adhesive (33),
Eco-friendly leather one-stop coating device, characterized in that 0.2 ~ 0.3mm.
Skin thin film coating step of coating the skin 13 thin film on the release paper 11;
Skin thin film drying step of drying the coated skin 13 thin film after the skin thin film coating step;
A water-based adhesive application step of applying the water-based adhesive 33 to the waterproof coating surface of the graft paper 31 after the skin thin film drying step (S70);
Water-based adhesive semi-drying step (S80) of semi-drying the applied water-based adhesive (33) after the water-based adhesive application step (S70);
After the water-based adhesive semi-drying step (S80), the leather graft paper bonding step (S90) of synthesizing the water-based adhesive 33 side and the leather 36 of the graft paper 31;
Leather graft paper pressing step (S100) of pressing the combined leather 36 and graft paper 31 after the leather graft paper bonding step (S90);
After the leather graft paper pressing step (S100), when the water-based adhesive 33 of the graft paper 31 is attached to the leather 36, the graft paper peeling step of peeling the graft paper 31 from the water-based adhesive 33 (S110);
After the graft paper peeling step (S110), the water-based adhesive 33 side of the leather 36 and the skin 13 thin film side of the release paper 11 are combined and pressed so that the skin 13 thin film is attached to the water-based adhesive 33 leather skin fusion step (S120);
Leather skin aging step (S130) of putting the attached leather 36, water-based adhesive 33, skin 13, and release paper 11 into the aging line 60 after the leather skin bonding step (S120);
It consists of a release paper peeling step (S140) of peeling the release paper 11 from the aged product after the leather skin aging step (S130);
The process of coating the skin 13 on the release paper 11 and the process of applying the water-based adhesive 33 to the leather 36 are separated and each is made in separate work lines, and the semi-dried water-based adhesive 33 is Eco-friendly leather, characterized in that it prevents the skin 13 and the release paper 11 from being damaged by the water component of the water-based adhesive 33 because it is applied to the leather 36 and then attached to the surface of the skin 13 One-stop coating method.

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