JPS5996947A - Manufacture of vinyl chloride resin metallic laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a vinyl chloride resin metal laminate (hereinafter abbreviated as a vinyl chloride steel sheet for simplicity), and in particular, to a method for manufacturing a vinyl chloride resin metal laminate (hereinafter abbreviated as a vinyl chloride steel sheet for simplicity), and in particular, a method for producing a vinyl chloride resin metal laminate (hereinafter abbreviated as a vinyl chloride steel sheet), which has a precise gloss pattern on the surface and excellent surface properties. The present invention relates to a method of manufacturing a PVC steel plate having the following. Conventionally, so-called vinyl chloride steel plates, in which a vinyl chloride resin film is bonded to the surface of a steel plate, have been used in large quantities as metal plates, but they have the following drawbacks.

■Since the steel plates are heated to around 200°C during lamination, the PVC sheet stretches irregularly and the printed pattern becomes distorted, making it impossible to obtain a product with a correct Ichichogaku pattern.

■The surface of the product is made of vinyl chloride film, so it is soft.
If you get hurt, sorry.

0 surface has a uniform luster and is difficult to change.

This Takemei product compensates for the above-mentioned drawbacks, has a glossy change pattern on the light surface with good reproducibility, and has excellent scratch resistance and chemical resistance on the surface. The present invention provides a method for manufacturing PVC steel sheets.

The method of the present invention will be explained in detail below with reference to the drawings.

As shown in Fig. 1, an arbitrary pattern is printed on the surface of the release film (1) using an ink called a matting agent on the marking part 11, and a matting ink layer (
21. The release film [11] must have release properties against the ultraviolet curing paint described below, high ultraviolet transmittance, high surface gloss, high heat resistance, and tensile strength. The reason for this is that it is high in quality and low in price. Based on these conditions, polyester film, polypropylene film, polycarbonate film, etc. are suitable as the =+ type film. In addition, the inks are melamine-curing alkyd resin, melamine-curing acrylic resin, Bo1 urethane resin,
For every 100 parts of binder such as polyamide resin or polyester resin, add 1 to 10 parts of fine powder such as silica, calcium carbonate, barium sulfate, etc. as a matting agent (mantle agent).
200 parts, surfactant 1-10 parts, solvent 100-40 parts
A mixture of 0 parts is used.

A trace amount of pigment may be added to improve printing workability.

Although any printing method can be used, gravure printing is common. Next, as shown in FIG. 2, an arbitrary pattern (4) is printed on the surface of the opaque vinyl chloride resin film (3) according to the VCl requirement.

As the vinyl chloride resin film (3), the amount of plasticizer D ~
40PH'R thickness of about 0.07 to 0.3% is used. When printing a pattern, it is preferable that the pattern be in harmony with the pattern of the matte ink layer (2). As the ink, a normal ink for vinyl chloride resin film is used. However, this printing is not performed when only a glossy change pattern is required as the final product.

Next, as shown in Figure 6, a transparent vinyl chloride resin film (
5) is coated with an ultraviolet curable paint to form a coating film (6), and the release film (1) is applied on top of this to form an ultraviolet curable paint film (( 3) Adhere so that they are in contact with each other and press them together using pressure rolls (7a) and (7b). Next, as shown in Figure 4, ultraviolet rays are irradiated from the back side of the release film (1) to form an ultraviolet curing paint. A coating film (S layer sheet by curing Gl) (14) is obtained.A known UV-curable paint is used as the coating film (6) K here, but the above-mentioned release film fl+ and matte ink are used. layer (having appropriate mold releasability for 21K)
It is essential. In addition, an appropriate paint ink should be selected and used depending on the required quality of the surface performance of the product and the ability of the ultraviolet irradiation equipment FL131. Specifically, acrylic resin-based or polyester resin-based solvent-free types are common.

Although the coating method is arbitrary, methods such as gravure coating and knife coating are common.

Next, as shown in FIG. 5, an opaque vinyl chloride resin film (3
) surface (the side with the pattern (4)) and the laminated sheet fl 4
1. Transparent or colored transparent vinyl chloride resin film (5)
The sides are pasted together to form a laminated sheet (8).

Next, as shown in Fig. 6, the laminated sheet (8) obtained in the above steps is coated with a metal plate (9) K that has undergone the necessary pretreatment.
, are bonded together via an adhesive (10). As the metal plate, a steel plate, a galvanized steel plate, an aluminum plate, etc. are used. Pretreatment varies depending on the type and condition of the metal plate, but generally includes steps such as degreasing, washing with water, chemical conversion treatment, washing with water, and drying. Further, as the adhesive, a known adhesive for PVC steel plates is used. The bonding method is to apply the adhesive to the metal plate using a roll coater, reverse roll coater, curtain flow coater, etc., and then dry the plate to a temperature of approximately 200°C4♀ using a drying device with a specified salinity. Heat to remove the solvent in the adhesive. Next, at the stage where the board temperature does not drop, the lamination sheet (8) is immediately laminated with the vinyl chloride film side as the adhesive surface. (11a), (111)
:l) to bond and integrate, and then immediately cool the whole thing, and then peel off and remove the top layer release film (1) as shown in Figure 7 to create the desired luster change pattern ( A PVC steel plate (12) having a diameter of 151 is obtained.

At this time, the pattern of the matte ink layer (2) that had been printed on the release film (1) K is removed along with the release film (11) because it has releasability against ultraviolet curing paint. does not remain.

In addition, the removal of the release film (1) is performed by lamination/-1-(8)
This may be done immediately after adhering the metal plate (9) to the metal plate (9), or at any time after that, for example, when it is actually installed on the building. In the latter case, the release film is attached to the product PVC steel plate (1
This means that it can be used as a surface protection film for No. 21.

Next, the method of the present invention will be explained in more detail based on Examples.

Example 1 A 1 cm square checkered pattern was printed on the surface of a 0.025 mm thick transparent glossy polyester film using a melamine-curable acrylic resin ink containing 5% silica as a matting agent, using gravure printing. After performing according to the method, 1
It was dried and cured at 14K at 80°C.

Next, on the surface of a white opaque vinyl chloride film for steel plates with a thickness of 01-l and a plasticizer content of 30 PHR, a pattern with a grain texture was printed using a vinyl chloride/vinyl acetate copolymer based vinyl chloride ink using a gravure printing method. It was 11.

Next, an acrylic resin-based ultraviolet curable paint (part name: Diabeam manufactured by Mitsubishi Rayon ■) was applied to a thickness of approximately 10 μm using the gravure coating method on the surface of a transparent vinyl chloride Filno film with a thickness of 3.4 mm and an amount of plasticizer of 30 PHH. After that, the printed polyester film is crimped and integrated with a pressure roll so that the printed surface is in contact with the UV-curable paint, and then UV rays are irradiated from the back side of the polyester film to cure the UV-curable paint film and laminated. It was made into a sheet.

Next, the surface of the white opaque vinyl chloride film and the back surface of the transparent vinyl chloride film were heat-fused and integrated to obtain a bonded sheet. The thus obtained laminated film was laminated to a steel plate.

Adhesive (product name: 5C-4 manufactured by Sony Chemical Co., Ltd.
57) to a coating thickness of approximately 7 μm, heated in an oven at 280°C for 1 minute to bring the plate temperature to 220°C, and immediately crimped the laminated film together with a pressure roll and immersed the entire film in cold water. Soaked and cooled.

When the polyester film on the surface is peeled off and removed, the surface of the obtained PVC steel sheet becomes glossy in the areas where the polyester film was in direct contact with it, and becomes matte in the areas that were in contact with the matte ink, resulting in an orderly change in gloss as a whole. It formed a pattern. Additionally, since the surface is covered with an ultraviolet-curable coating, it is hard to get scratched and has excellent abrasion resistance and stain resistance.

Example 2 A slanted stripe-like ink containing 5% silica as a matting agent and having releasability against the ultraviolet ray curing paint described below was applied to the surface of a transparent glossy polyester film with a burying depth of 0.025. The pattern was printed using a gravure printing method.

Next, on the surface of a transparent vinyl chloride resin film for steel plates with a thickness of 3.4 mm and a plasticizer content of 30 PHR, an acrylic resin-based ultraviolet curable paint was applied to a thickness of about 10 μm using a gravure coating method. After the printed polyester film is crimped and integrated with a pressure roll so that the printed surface is in contact with the ultraviolet curable paint, the ultraviolet rays are irradiated from the back side of the polyester film to harden the ultraviolet curable paint film, We have obtained a large number of sheets of vinyl chloride film and polyester film.

Next, the surface of a black opaque vinyl chloride film having a thickness of 0.4 mm and a plasticizer content of 30 PHH was heat-sealed to the back side of this laminated sheet to obtain a laminated sheet.

This laminated sheet was laminated to a steel plate in the same manner as in Example 1 to obtain a PVC steel plate. However, after lamination, the polyester film was not peeled off and remained attached as a surface protection film of the product. When producing a door panel using this PVC steel plate, we went through a process of pressing it in a hot press at 140'C for 10 minutes, but because the polyester film on the surface has high heat resistance, the surface of the door panel after peeling and removal was uneven. There was no change in gloss, and there was no distortion of the pattern when the steel plates were bonded together, and a well-ordered striped pattern was exhibited, giving it an extremely high design quality.

To summarize the above-mentioned effects of the present invention, (1) In the state of a laminated sheet, a vinyl chloride film, which originally has low heat resistance, and a release film, which has high heat resistance, are temporarily bonded via an ultraviolet curable paint. Since it is bonded to a metal plate, irregular stretching of the sheet during bonding can be prevented. Due to this,
It is possible to create designs with a high degree of accuracy that were previously considered impossible.

(2) Since the pattern is printed in advance on the surface of the release film with matte ink containing a mantle agent, the pattern of gloss change is directly expressed on the surface of the product.

+31 The surface of the jllu product is covered with an ultraviolet curable coating, so it is better than the ItC product, which is simply laminated with vinyl chloride sheets, and has extremely superior surface properties such as scratch resistance and stain resistance. .

(1) Since there is a transparent vinyl chloride film layer, this layer J
) The pattern and luster are different from each other.
A slant appears between the letter R, which has the effect of emphasizing the depth and three-dimensionality of the image.

(5) The release film can be used as a surface protection film for the final product, and in this case, it is more advantageous in terms of cost and heat resistance than applying a new protective film.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the state of printing with ink containing a release film agent, Fig. 2 is a schematic diagram showing the state of applying an arbitrary pattern to an opaque vinyl chloride film, and Fig. 6 is a schematic diagram showing the state of printing with ink containing a release film agent. , A schematic diagram showing the process of applying an ultraviolet curable paint to a transparent vinyl chloride film and then adhering and integrating the release film shown in Figure 1. Figure 4 shows the laminated sheet obtained in Figure 6. Figure 5 is a schematic diagram showing the process of curing an ultraviolet curable coating film by irradiating it with ultraviolet rays. Figure 6 is a schematic diagram showing the process of laminating the laminated sheet obtained in Figure 5 to a metal plate coated with adhesive, and Figure 7 is a schematic diagram showing the process of laminating the laminated sheet obtained in Figure 6. The final product is obtained by removing the release film from the surface of the metal plate. It is a schematic diagram showing a process. (1)...Release film (2)...Matte ink layer (3)...Vinyl chloride resin film (opaque) (4)
...Picture (5)...Vinyl chloride resin film (transparent) (6)
...Ultraviolet curable paint film (7a) (7b) ... Pressure roll (8) ... Lamination sheet (9) ... Metal plate (10) ... Adhesive (i ia) ( 1l b) =・Laminating roll (12
)... PVC steel plate (13)... Irradiation installation (14)... Temperature H℃ sheet

Claims (1)

[Claims] (1) The following process a% (characterized by 1): Printing an ink containing a matting agent on the surface of the mold and having releasability to the cured film of the ultraviolet curable paint described below. Step of forming a matte ink layer with an arbitrary pattern, b. Applying an ultraviolet curable paint to the entire surface of a transparent or colored transparent vinyl chloride resin film, and applying the ink layer obtained in the above step to this uncured coated surface. The process of press-bonding the release film so that the matte ink layer is in contact with the matte ink layer, and then irradiating ultraviolet rays from the back side of the release film to harden the UV-curable paint to form a laminated sheet.A desired printed pattern is printed on the C0 surface. A step of laminating the surface of the opaque vinyl chloride resin film with or without the transparent or colored transparent vinyl chloride resin film side of the laminated sheet to form a laminated sheet, d. Pre-treated if necessary. A step of applying an adhesive to the surface of the metal plate and heating and drying it, immediately laminating the opaque vinyl chloride resin film side of the laminated sheet obtained in the previous step, and peeling off the release film after cooling the metal plate. .