JP2011032377A - Method for forming japanese lacquer coating of leather - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that in a conventional method for producing japanned leather, Japanese lacquer paint is applied on the body of leather and therefore an enzyme which the Japanese lacquer originally has and oxygen in air performs a binding reaction to form a hard urushiol layer on the coated surface, thereby creating a fragile surface. <P>SOLUTION: The Japanese lacquer paint 1H is applied to one surface of a sheet 3 so that the paint becomes thin and uniform, and leather 2 is placed thereon. The resultant product is placed on a pallet 5 so that the leather 2 is on the downside and the sheet 3 is on the topside. The pallet 5 is housed in a dry storage shelf and is stored and dried. When the Japanese lacquer paint is half dried during the storage, the Japanese lacquer paint 1H is pressed on the leather 2 side from the sheet 3 side and is compulsorily drawn. The sheet 3 side in contact with the Japanese lacquer paint 1H is formed into a rubbery portion 1G, while the part in contact with the leather 2 is formed into urushiol portions 1U and 2U, thereby forming a coating layer 1 by discharging air that exists inside of the thin Japanese lacquer paint film 1H, between the sheet 3 and the Japanese lacquer paint 1H, or between the leather 2 and the Japanese lacquer paint 1H. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to processing of lacquer that covers lacquered leather that has been finished with tanning, and relates to a method of forming a coating layer that can bend the leather to which lacquer coating is attached, as well as its decorative properties.

  Leather is an everyday item, including shoes, wallets, business card holders, bags, handbags, etc., and is widely used for general use. Some of these leather products are painted on the surface or printed.

  On the other hand, in general households, lacquered finishes such as baskets and trays are well known and have long been used as lacquerware. This technique of coating lacquer is also a traditional technique handed down from ancient times in Japan.

To see the process of coating the lacquer of the ridge or tray, the entire inside and outside of the cut are smoothed with sandpaper, and the astringency is applied. When the persimmon is dried, lacquer is applied with a brush. Depending on the article, it may be applied twice or three times. After this is dried, it is polished and polished with sandpaper or charcoal.

With this lacquer coating, the enzyme contained in the applied lacquer reacts with oxygen in the air and solidifies, forming a hard urushiol on the surface of the coating layer and a flexible rubber on the surface side of the fabric. The Since the lacquer is solidified and the coating layer on the surface side is hardened, the fabric is made of wood, but it is said that its water absorption is suppressed and that the hard urushiol is lustrous and decorative. In addition, lacquer has antibacterial properties and prevents the occurrence of mold.

Japanese Patent No. 37797 JP 59-73081 A JP-A 63-267480 JP-A-6-179900 JP-A-6-279800 JP-A-60-150867

  Enamel paint or lacquer is applied to the surface of the leather (see Patent Documents 1, 2, 3 and 5) to produce lacquer. There is also a leather processing method in which a final finish process such as coloring and glazing is performed after cutting or die-cutting into a shape according to the purpose (see Patent Document 4).

As this glazing method, a resin is applied to one surface of a vinyl chloride film, the coated surface is superimposed on an arbitrary base material, and the vinyl is peeled off after the resin is solidified or cured (see Patent Document 6). There is also a formation method.

Paints include natural paints such as lacquer and synthetic paints based on synthetic resins. Those that are cured by contact with air and those that are cured by heating are commercially available. In any case, the composition constituting the paint is solidified by supplying oxygen, and the coated coating surface is harder than the inside. Further, the harder the surface, the more glossy the coating surface becomes.

Even in natural lacquer, the surface is hard as described in the manufacturing process of the cocoon. When lacquer is applied to leather cover formation (Patent Documents 1, 2, 3, and 5), unevenness of coating occurs when brushed. This unevenness can be corrected and smoothed with wrinkles or wrinkles, etc., but if it can be bent to some extent, such as leather, cracks will occur from where the unevenness is. It partially varies in hardness depending on the thickness, cannot withstand bending, and partially grows on the surface of the coating.

On the other hand, leather has a fiber structure, and air can flow through the fiber structure, so oxygen in the air has the same urushiol quality on the surface of the applied lacquer paint and the inside that contacts the leather. Will be formed. In other words, the entire lacquer coating is a urushiol layer, and the surface coated with the lacquer coating is used as the surface. In the lacquer used to bend, the entire surface is hard. Cracks occur in the surface.

An object of the present invention is to form a lacquer coating thinly on a leather, to form a leather that can be bent by forming a rubber layer on the surface of the coating layer and an urushiol adhesive layer on the leather. Is.

In order to achieve this object, the present invention employs the following coating formation method.

A method of forming a lacquer coating, in which a lacquer coating is applied thinly and uniformly on one side of a sheet, a leather is placed on the lacquer coating, and the sheet is peeled off from the leather after drying the lacquer coating, the applied lacquer coating and leather The lacquered surface and the leather are in close contact with each other and dried, and when the drying is semi-dry, press the leather from the sheet surface side where the lacquer is not applied, While extruding air on the lacquer surface and leather surface, it is completely in contact with the leather through the lacquer paint, and it is the boundary with the leather that contacts the air when dry.

In other words, when applying lacquer paint to a sheet, air is applied to the sticky lacquer paint when applied with a brush, or when the applied surface is leveled, or air that has been pushed out from fibrous leather, May remain as air bubbles. When the air remains, the air bubbles are destroyed by simply bending the lacquer after the lacquer coating is dried, and the product is extruded while handling the air in order to prevent the product from being damaged. Furthermore, the sheet and the lacquer paint, and the lacquer paint and leather are brought into close contact with each other through the lacquer paint.

Moreover, when drying, it is stored in a state where leather is placed on the sheet.

The sheet is completely non-breathable, and the leather is fibrous and breathable. Therefore, the sheet is dried and stored in a state where the leather is placed on the coated surface of the lacquer paint. Due to this drying, at the boundary between leather and lacquer paint that comes into contact with air, the enzyme contained in the lacquer reacts with air and solidifies to form urushiol. This urushiol material slightly penetrates into the leather fiber structure. On the other hand, on the side in contact with the sheet, rubber is formed without contact with air during drying. In other words, the leather is bonded to the lacquer paint with a hard layer, and the surface side is covered with a flexible layer.

The leather lacquer coating forming method of the present invention uses a lacquer coating process and a smooth surface forming method (Patent Document 6), which have been used for manufacturing lacquerware for baskets and trays, which have been conventionally performed. This is a method of forming urushiol and rubber that are impossible with synthetic resin paints. When used after completion, the surface becomes rubber and the inside forms hard urushiol. The urushiol is connected to the fiber structure of the leather as if pushed into the fiber structure of the leather, so the urushiol can bend the leather by contracting the fiber structure. Since the coating is protected and cracks are not generated by bending during use, the decorativeness is excellent in addition to the smooth surface.

Explanatory drawing which shows the handling process which is a part of process of this invention, and the last peeling process The partial cross-section enlarged schematic diagram of the finished product. (A) is a side view of leather. (B) is a side view of a sheet, and leather shows a state of being placed on the sheet. (C) is a side view showing a state of drying and storage by placing a sheet and leather on a table.

  The leather lacquer coating forming method of the present invention will be described below with reference to the drawings.

  At least the surface of the tanned leather 2 (the surface that comes into contact with the lacquer paint described later) is thoroughly leveled with sandpaper, and the strawberry astringency is applied. By applying this persimmon astringency, the adhesion with the lacquer coating in the subsequent process is improved (see FIG. 3A).

  Moreover, the lacquer coating 1H is thinly applied to one side of the transparent sheet 3 with a brush to a size equivalent to the size of the leather 2, and gently smoothed with a scissors (see FIG. 3B). The transparent sheet 3 in the embodiment is made of polypropylene, but may be plate glass. However, in the handling step in the next step, the relationship with the applied lacquer paint 1H is well understood, so that the resin made of polymer material has better workability, and if it is made of glass, it breaks. This is not preferable because there is a possibility.

  Next, the transparent sheet 3 is placed on the pallet 5, and the lacquer coating 1H is brought into contact with and pressed against the surface of the leather 2 on which the strawberry is applied. This pressing is efficiently performed by rolling a rubber roll on the leather 2 (see FIG. 3C).

  In FIG. 3, the solid arrows between (A) and (B) and between (B) and (C) move to the next step (from (A) to (B), respectively. (B) to (C)).

  The pallet 5 is a framed frame, but a simple plate obtained by cutting a plywood board is sufficient, and the pallet 5 is stored in a separate drying shelf in the state shown in FIG. Let

  In this drying, the leather 2 is on the upper side and the sheet 3 is on the lower side. Since the leather 2 is a fiber structure in the drying process, it has air permeability through the fibers. This is because the air permeability of the sheet 3 cannot be expected, so that the lacquer paint 1H on the sheet 2 is supplied with air.

  When the lacquer paint 1H is in a dry state, generally, the leather 2 is placed on the work table 4 so as to become the sheet 3 between 2 and 4 days after the application, and the sheet 3 is placed on the bag 3 Press and level with a scissors so that it is handled toward the left L, right R or the end 3T in the direction perpendicular thereto (see FIG. 1). At this time, air bubbles may be seen in the lacquer paint 1H through the transparent sheet 3, so it is important to carefully remove the air bubbles from the region of the lacquer paint 1H. Moreover, the sheet | seat 3, the lacquer paint 1H, and the leather 2 will contact watertight by this operation | work.

  This leveling operation can also be performed by rolling a rubber roller. That is, it is possible to automate the work by making a roller with a sponge and rolling it while deforming it so as to fit the surface of the pressed sheet 3 and leather 2.

When the operation is completed, the state is returned to the state shown in FIG. 3C, and is dried and stored. Dry storage will be completed in at least two weeks. The thickness of the coating layer 1 after drying is a desired value, but is preferably 0.1 mm.

  After drying, the leather 2 (hereinafter referred to as “lacquered skin”) formed with the covering layer 1 is put on the work table 4 and pulled and peeled from the end 3T in the T direction (see FIG. 1). can get.

  As seen from the cross section of the lacquer, the covering layer 1 has a rubbery 1G on the surface side, and the rubbery 1G and the boundary are not clearly distinguished, but are formed with a urushiol 1U. In the leather 2, urushiol 2U, which is considered to have been pressed into the lacquer paint 1H during raw drying, is continuously seen with the urushiol 1U (see FIG. 2). This can be said that the coating layer 1 enters the fiber structure of the leather 2 and is firmly attached to the leather 2.

  And since the lacquer is used with the covering layer 1 facing outward, the rubber layer 1G bulges even if it is housed like a wallet or a business card holder and needs to be easily bulged. Is allowed.

DESCRIPTION OF SYMBOLS 1 Coating layer 1H Lacquer paint 1G Rubbery 1U Urushiol 2 Leather 2U Urushiol 3 Sheet

Claims (2)

In the method of forming a lacquer coating, in which a lacquer paint is thinly and evenly applied on one side of a sheet, a leather is placed thereon, and after the lacquer paint is dried, the sheet is peeled off from the sheet.
The applied lacquer paint and leather are pressed so as to adhere to each other, and the lacquered surface is dried so that the lacquered surface is in close contact. The sheet is pressed to extrude the air on the surface of the sheet and the lacquer paint surface and the leather surface, and the sheet and the leather are in close contact with each other through the lacquer paint, and the lacquer paint comes into contact with the air when dried. It is a boundary with leather,
Lacquer coating film formation method. During the dry storage, storing in a state where the leather is placed on the sheet,
The lacquer coating film forming method according to claim 1.

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