JPS5825982A - Manufacture of solid thick decorative vinyl chloride film - Google Patents

Abstract

PURPOSE:To obtain a decorative vinyl chloride film for expressing a solid pattern easily by a method which comprises the coating of a gravure printed releasing paper with a vinyl chloride paste sol, gelatization thereof, thick printing thereof with a transparent vinyl chloride paste ink and the removal of the releasing paper. CONSTITUTION:A releasing paper in which a silicone resin coating or other working is provided on the surface of a Kraft paper or the like undergoes a multicolor gravure printing beforehand. The printed paper 1 is coated with a transparent vinyl chloride paste sol 3 by means of a coater 2. Then, the coated paper is gelatinized in a heating furnace 4 and cooled. Subsequently, it is thickly printed with a transparent vinyl chloride paste ink 7 on a screen printing machine 6. Then, the thickly printed ink 7 is gelatinized and melted in a heating furnace 8. In this process, it is kept stuck on the releasing paper thereby enabling a thick printing without changes in the dimensions. After the cooling of the thickly printed releasing paper, the releasing paper alone is peeled off on peeling roll 10 to obtain a solid thick decorative vinyl chloride film 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention differs from decorative PVC films printed with ordinary flat patterns, and uses three-dimensional thick printing to express uneven patterns on plywood, asbestos slate, gypsum board, and plaster. This invention relates to a vinyl chloride film used for decorative surface application of boards.

Conventionally, plywood has been the mainstream as a decorative material used for building wall materials, housing equipment, houses, etc., and is made by direct printing on thin plywood of 2.3'XS degree, or pasting decorative thin paper, etc. has captured a considerable share of the market, but
Recently, due to restrictions on Kitsuki interior materials, asbestos slate,
Inorganic boards such as gypsum boards, diaphragm boards, and PC boards have become popular, and are now being used as decorative surface materials in order to compensate for the fragility, water absorption, and smoothness of the base materials. Color gravure-printed PVC film has been widely consumed in the market, but Oto gravure fine J film is printed with gravure ink only a few microns thick, and for example, the wood grain pattern is very natural for 911. Unlike wood grain, it merely provides a printed flat wood grain window. To compensate for this, attempts have been made to add conduit patterns (using heat embossing, or in some cases, tone embossing, etc.) through heat suppression, but these efforts only give a simulated wood texture. On the other hand, when it comes to abstract geometric patterns, the commonly used calendar roll-rolled PVC film shrinks and warps during the drying process after printing with gravure ink, making it difficult to accurately reproduce the pattern. Furthermore, even if thick printing is performed by screen printing, the film itself will melt at the melting temperature of the PVC-based ink normally used for five purposes, making printing impossible.

As a measure to improve this, a series of floor sheet technologies, starting with the chemical emboss method of Congoliwam Co., Ltd. in the United States, used a sheet made of glass fiber paper cloth impregnated with PVC paste sol as a backing material to prevent expansion and contraction. A method of performing multi-color three-dimensional thick printing has been carried out, but in these methods, the minimum thickness of glass paper, for example 20 g+'
Even if glass paper of Q grade is soaked in PVC paste sol for three times, the thickness will be more than 0.2'51, and it is not suitable for building materials in terms of price and as a surface material for pasting on boards including noncombustible materials. Considering the interior design restrictions, too much organic material would be added to the surface. The present invention is a method for economically and highly efficiently producing decorative PVC film that exhibits three-dimensional wood grain patterns, stone grain patterns, and abstract patterns required in the market, while avoiding the drawbacks of conventional methods. We aim to provide the following.

Hereinafter, a detailed description will be given according to the side sectional view of the process showing one example of the '1st embodiment of this patent shown in the attached drawing, Figure 1.1. This is a release paper with multicolor gravure printing, and the release paper is made of kraft paper, exposed kraft, titation-treated paper, etc., and the printing ink has good adhesion to PVC.
After the subsequent thermal processing step, printing was performed using an ink that had sufficient releasability to the release paper. Of course, due to the purpose of this product, it goes without saying that heat-resistant and weather-resistant colorants are used.

The release printing paper (1) is sent to a coater (2) and coated with a transparent PVC paste sol (3). This coating layer serves to protect the thin printing ink layer of gravure, and its thickness is selected depending on the purpose, but for example, a thickness of about 50 to 100 .mu.m is sufficient for ordinary decorative wall materials. Although this figure shows an example of a roll coater, curtain flow coaters, doctor knife coaters, spray coaters, etc. may also be used. The formulation of a typical transparent paste sol is determined by the type of coater used and the hardness or softness of the target product. In the example of a knife coater, yes! 45 parts of agent, viscosity F3.0OOCPS pestle. Ultraviolet absorbers are used to prevent deterioration due to ultraviolet rays from sunlight during use. The coated release paper is sent to a heating furnace (4) where it is gelled. As the heating furnace, any method such as an infrared heating furnace, a far-infrared heating furnace, a hot air circulation heating furnace, a steam heating furnace, etc. may be used. The heating conditions were for a coating thickness of 100 μm and a temperature range of 150° C. to 180° C. for 30 seconds to 4 degrees for 1 minute. Next, the coated and gelled release paper is cooled on a cooling roll (5), and then
), and the transparent PVC paste ink (7) is used for thick printing.1 The thickness of the thick printing ink is selected depending on the purpose, but to express a three-dimensional effect, it is at least 0.2 :%
The maximum printable range is O, SX.
Up to a certain extent. The screen printing machine used for this purpose is usually a Dutch Stokes rotary printing machine, in which a cylindrical perforated screen plate rotates and squeeze ink is extruded from the openings to print. In other methods such as the Stokes method, the Zimmer method, and the Swiss company Buzer, the cylindrical screen is formed by nickel plating or etching on rolls of the same shape. The thickness is limited to about 150μ, and when increasing the thickness beyond this,
The opening hole becomes tapered and obstructs the extrusion of printing ink. Therefore, with a cylindrical plate made by ordinary screen printing, the range of accurate pattern printing is 50μ to 100μ. For the purpose of this patent, in-thickness printing is performed using a circular perforated screen (1) by using ordinary paper or etching as shown in Figure 2.
Paste the photosensitive resin material (15) on top of 4) using the same photosensitive resin liquid, and after attaching the original film, expose it to ultraviolet rays, wash out the unexposed areas, and perform aperture printing. Part (13
) and use a rotary plate.

As the photosensitive resin film, nylon, synthetic rubber, modified PV
There are various examples of A temples, but in all cases, the number is 100 to 5.
A film having a thickness of approximately 0.00 μm is used, and contains dianonium salts as a photosensitizer. Therefore, this one! ] By increasing the thickness of the pleura, the amount of printing ink that can be extruded, that is, the amount of printing ink can be increased.

For example, if a cylindrical porous screen is used with a cylinder of 40 m/l and a photosensitive resin of about 200 μm is pasted on the screen, a printing ink thickness of about 300 m/l will be obtained. One of the features of this patent is that thick printing can be achieved using an intuitive rotary plate. Typical examples of printing ink formulations include: (Ultraviolet absorber 0.1 part by weight, etc. is used, and silica gel, petonite, aluminum stearate, etc. are added as gelling agents to improve the ink's yapability.) The pattern areas to be thickly printed are local pattern areas such as the raised areas of tiles, etc. excluding the joints in Clavia printing, and the winter grain areas of wood grain printing.

The release paper printed with Atsushi is sent to the heating furnace (e) and heated and melted. As with the heating furnace (4), various types of furnaces can be used for the heating furnace (8), but In this case, for gelation and melting of thick printing ink, the temperature is 190°C to 210°C.
It is safe to spend 1 to 2 minutes at grade C. At such high temperatures, if ordinary PVC film is used alone, the film itself will melt and break, making it impossible to print a stamp etc. 1 In ordinary gravure printing, the amount of ink is small, And since it is a bath agent evaporation type ink, it takes only a few seconds.
Since it is only heated at a temperature below °C, it is possible to print with a film alone, but as in the case of this patent, thick walls and PVC paste-based ink require printing at a temperature of at least 190 °C.
The degree of welding is required to be 200% for solvent thread ink.
When printing on a thick wall such as μ, it is impossible for the solvent to scratch or scatter, and the solvent must be heated for a long time to completely remove the solvent from inside. .As with this % meter, printing is heated with the axis aligned on the release paper, so thick printing is possible at high temperatures without any size limitations. Of course, after leaving the heating furnace, the thick printed release paper is cooled on a cooling roll (9), and then the release paper is transferred to a release roll (1).
0), peel it off, roll it up as shown in (12), and roll the peeled three-dimensional thick decorative PVC film into a roll shape as shown in (11) to make a product. In this case, instead of cutting the sheets as in (11), they may be cut in a constant -j degree direction and laminated in the form of each leaf.

The product obtained through the above process is produced by the manufacturing method as claimed in claim (1), and has a structure as shown in FIG. The layer (16) ζ has a transparent vinyl chloride layer (17) thereon, and a transparent thick vinyl chloride ink layer (18) on the thick pattern portion thereof. (
Since the layers 17 and 18 are both transparent, the pattern created by the gravure printing ink appears on the surface as it is. and(
18) Because of the thick transparent layer, the pattern appears three-dimensionally. However, in this case, since the bottom layer is a thin gravure l:1'' side layer, there is no problem when using this decorative film by laminating it on a base material such as a gypsum board or a base material coated with a certain coloring agent. In the case of items such as plywood, where the color of the surface resin varies from sheet to sheet, the color of the base material may affect the upper layer and the finished color may not be consistent. In this case, instead of Fig. 1 (1), a product is pre-swaged, coated with a colored, for example, white, PVC paste sol and then gravure printed on a release paper using a manufacturing method as claimed in claim 2. A product having the structure as shown in FIG. 4 is obtained, with a colored PVC layer (19) under the gravure printing ink (16), which allows for a skewer that is not dominated by the color of the lower laminate base material. Therefore, the surface cosmetic effect is exactly the same as the configuration shown in FIG.

As mentioned above, in the case of claims 1 and 2, the release paper is pre-crimped on a separate line and gravure printing is performed, but as claimed in claim 3, the release paper (1), and (2) coat the colored PVC paste sol with a coater (6). After multicolor printing, a three-dimensional thick decorative PVC film is obtained by peeling off from the release paper.

In this case, two rotary screen machines are used.
If three rotary screen machines are used, a three-color printing pattern can be obtained, but at least one color is
It is necessary to perform thick printing three-dimensionally using the above-mentioned thick special screen plate, and for other rotary printing machines, you can use a regular cylindrical screen plate such as the Stokes type for thin printing. . The advantage of this case is that it can all be done on a line, but it is necessary to have one or more rotary screen machines. An example of a product obtained by this method is as shown in Figure 5, in which the bottom layer is a colored PVC layer (19), (20) is a thin screen printing ink layer, and (21) is a thick screen printing part. 1] Ink jso. In the case of coating, colored vinyl chloride paste and colored vinyl chloride paste thick-wall ink are obtained by adding a coloring agent such as a pigment to the above-mentioned formulations (f) and (II). In addition, when several rotary screen machines are used, after multicolor printing is performed with colored PVC paste, the final rotary screen machine is used to print thick walls with transparent PVC paste ink using a special screen plate. The case where a general product as shown in FIG. 6 is manufactured by printing is also an example of the embodiment of this patent. (Claim 17H, Item 3, A, Figure 6, 11C7, (2)
0) is the thin screen printing ink layer of the first edition, (21)
is the thin screen printing layer of the second version, which is the same ((18)
7! i: A thick printed transparent PVC layer that gives a three-dimensional effect.

As mentioned above, the three-dimensional thick decorative PVC film manufactured by the manufacturing method of this patent is simple to manufacture, has a three-dimensional effect different from that of the conventional embossing method, has high abrasion resistance, does not lose its geometric pattern, and can be used on various boards. Types of narrow-sided decorative materials, tablecloths,
It has many uses, such as for shed curtains, etc. 7th
The figure is a perspective view of one example of the embodiment of this patent, and shows a product when used as a PVC wood grain pattern film, and the film thickness is 5.
0μ, internal thickness 200μ - Yes.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the process showing 11+lI of the embodiment of the manufacturing method of this patent, Fig. 2 is a side sectional view of the special screen cylinder, and Fig. 3 is the method described in Section 1 of Section 12 of this Patent Discussion. Figure 4 is a cross-sectional view of an example of a product according to
Cross-sectional view of an example of a product produced by the method described in Section 5, Figure 6
Each of the figures is a sectional view of a product according to an embodiment of the method according to item 3. FIG. 7 is a perspective view of a PVC film with a three-dimensional wood grain pattern, which is an example of an embodiment of the present patent. In the figure (1) Release paper with pre-crimped gravure stamp (2)
Coater (3) PVC paste sol (4), (8) Heating furnace (5), (9) Cooling roll (10) Peeling roll (11) Rolled product (12) Peeled template paper (13) m-light Post-washed aperture printing part (14) Porous cylindrical screen (15) Photosensitive synthetic resin film (16) Gravure printing ink layer (17) Transparent PVC layer (18) PVC thick printing ink layer (19) Colored PVC Layer (20) Thin printing ink layer by rotary screen 1st edition. (21) Thick printing ink layer by rotary screen 2nd edition. (22) Thin printing ink layer by rotary screen 2nd edition. Patent applicant Kodama Chemical Industry Co., Ltd.

Claims (3)

[Claims] (1) After pre-caulking and multicolor gravure printing on the printing surface of continuous roll release paper, in the first step, transparent PVC paste sol is applied, heated to gel, and in the second step, rotary screen printing Using a machine, use a special screen plate for thick printing to print the convex pattern of the gravure printing pattern using transparent PVC paste sol ink with a thickness of 0.2% or more, and then heat and melt. , a method for producing a three-dimensional thick decorative PVC film obtained by peeling from release paper (2) Colored PVC paste sol is applied in advance to the release surface of a continuous roll of release paper, heated to gel, gravure printed, and then the first and second steps in the previous section (1) are carried out. After going,
Method for manufacturing 3D thick decorative PVC film obtained by peeling from release paper (3) After coating the template surface of the continuous roll release paper with colored vinyl chloride paste sol in the first step, in the second step, using one or more rotary screen Sakaki, a special screen plate for thick-wall printing and a thin-wall A three-dimensional thick wall is obtained by squaring the printing plate, printing a multicolor uneven pattern on a thin wall and a thick wall of 0.2% or more using a colored PVC paste sol, heating and melting it, and then peeling it off from the template paper. Manufacturing method for decorative PVC film