JPS6052955B2 - How to make printed plywood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing decorative plywood that realistically expresses the appearance of wood by making the spring and autumn wood portions of the woodgrain pattern on the surface have different luster.

Conventional printed plywood is produced by sequentially printing a ground coat, a bokeh plate, and a tightening plate, or a ground coat, a bokeh plate, a tightening plate, and a conduit plate on a base plate that has been surface-finished and sealed to form a wood grain pattern. Furthermore, it is made by finishing coating with amino alkyd resin, unsaturated polyester, polyurethane resin, etc., and the luster is uniform over the entire surface, so the spring wood part, which is soft and matte, and the autumn wood part, which is hard. The difference between the glossy wood part and the wood part was not reproduced, and there was a drawback that the wood part was confusing.

The method of the present invention is a method for manufacturing printed plywood that eliminates the above-mentioned drawbacks. That is, in the present invention, a ground coat layer is formed by coating the entire surface with a matte paint or ink on a pretreated base plate, and a base plate for wood grain is applied on the ground coat layer using a blurred plate with cross ink or matte ink. A pattern is printed, and then a finishing pattern is printed on the base pattern using a tightening plate with cloth ink to form a wood grain pattern, and then the entire surface is coated with transparent cloth ink using a thermosetting resin as a binder. This method of manufacturing printed plywood is characterized in that the wood grain patterned spring wood portion is covered with a matte transparent resin film by part-coating with a transparent matte ink using a thermosetting resin as a binder. In the above, the blur plate is a printing plate mainly used to express the color gradation of the spring wood, and the firmness is printed after printing the hoke plate, mainly to express the tight wood texture of the autumn wood. This is the printed version.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

1 to 5 are schematic diagrams showing the configuration of each step of the method for manufacturing printed plywood according to the present invention.

First, as shown in the first diagram, a matte dye or ink is coated over the entire surface of the base plate 1, which has been subjected to pre-treatment such as surface finishing and sealing, using a normal coating method such as roll coating, gravure coating, or screen coating. Then, a ground coat layer 2 is formed.

Next, as shown in the second diagram, a gloss plate is printed on the ground coat layer 2 by a normal printing method such as a gravure printing method, a gravure offset printing method, or a screen printing method using a normal gloss ink or matte ink. Then, a finishing pattern 4 is printed on the base pattern using ordinary gloss ink or matte ink using a tightening plate to form a wood grain pattern. Next, as shown in Figure 4, the entire surface is coated with a transparent gloss ink containing a thermosetting resin as a binder to form a coating layer 5 on the entire surface.
Then, as shown in Figure 5, a printed plywood board 7 is formed by part-coating with a transparent matte ink using a thermosetting resin as a binder to cover the spring material portion of the wood grain pattern with a matte transparent resin film 6. . The matte paints or inks for the ground coat layer include known ones, such as natural resins such as shellac, copal, dammar, rosin, and rosin ester, or modified resins thereof, nitrocellulose,
Cellulose derivatives such as acetyl cellulose, ethyl cellulose, benzyl cellulose, phenolic resins, urea resins, phthalic acid resins, maleic acid resins, melamine resins, polyvinyl acetate resins, polyvinyl chloride resins, acrylic resins , polyvinyl alcohol, polyvinyl butyral, epoxy resins, silicone resins, polyester resins, polyamide resins, polyurethane resins, other synthetic resins, other chlorinated rubber, cyclized rubber,
Paints or inks may be used in which a vehicle is made of a rubber derivative such as synthetic rubber, and a colorant, an extender pigment such as precipitated barium sulfate, a plasticizer, etc. are added to the vehicle.

The gloss ink or matte ink for printing the blurred plate and the hardened plate is known, for example, a vehicle containing a coloring agent such as a dye or a pigment, an extender pigment, and further, for example, a plasticizer, a stabilizer, a wax, a grease, etc. Known additives such as a desiccant, an auxiliary desiccant, a curing agent, a thickener, a filler, etc. can be optionally added thereto, and an ink composition prepared by sufficiently kneading with a solvent, diluent, etc. can be used. .

In the above ink composition, the vehicle may be made of known materials such as various oils and fats such as linseed oil, soybean oil, and synthetic drying oil, rosin, copal dammar, hardened rosin, rosin ester, and polymerized rosin. Natural and processed resins, rosin modified phenolic resin, 100%
Synthetic resins such as phenolic resins, maleic acid resins, alkyd resins, petroleum resins, vinyl resins, acrylic resins, polyamide resins, epoxy resins, aminoalkyd resins, fiber breath derivatives such as nitrocellulose and ethylcellulose, chloride Rubber, rubber derivatives such as cyclized rubber, glue, dextrin, dextrin, tin, etc. can be used.

The transparent gloss ink using the thermosetting resin as a binder is, for example, one in which an isocyanate-containing resin is added as a curing agent to a binder such as an acrylic resin containing a polyol or a polyester resin, or one in which a resin containing an isocyanate is added as a curing agent to an amino alkyd binder. Plasticizers, slip agents, waxes, greases, desiccants, thickeners, dispersants, etc. are optionally added to acids such as acids and organic acids as curing agents, and the mixture is thoroughly kneaded with solvents, diluents, etc. An ink composition made of the following can be used.

The transparent matte ink using the thermosetting resin as a binder includes, for example, a binder such as acrylic resin containing polyol or polyester resin, to which an extender pigment is added for erasing, and a resin containing isocyanate is further added as a hardening agent. Alternatively, an extender pigment for erasing is added to an amino alkyd binder, and an acid such as an inorganic acid or an organic acid is added as a hardening agent, and a plasticizer, slip agent, etc.
It is possible to use an ink composition prepared by adding optionally wax, grease, desiccant, thickener, dispersant, etc. and sufficiently kneading with a solvent, diluent, etc.

The method of the present invention will be specifically explained below with reference to Examples. Example 4 A water-based filler paint was applied to the surface of TfrIn thick lauan plywood, and then a ground coat layer was formed by gravure printing using ink made of a nitrocellulose vehicle.

Next, a base pattern of the wood grain was printed using a pocket plate with a matte ink made of a nitrocellulose vehicle on the groundcoat layer, and then a gloss ink made of a mixture vehicle of nitrocellulose and alkyd resin was printed. A finishing pattern was gravure offset printed on the base pattern using a tightening plate to form a wood grain pattern.Then, the entire surface was roll-coated with a transparent cloth paint made of a thermosetting urethane vehicle, and then a thermosetting urethane vehicle was applied. Printed plywood was manufactured by partially coating the spring wood portion with a wood grain pattern using transparent matte ink consisting of a vehicle using gravure offset printing.The gloss of this printed plywood was different between the spring wood portion and the fall wood portion with the wood grain pattern. It was printed plywood that realistically expressed the feel of wood.

As detailed above, according to the method of the present invention, it is possible to produce printed plywood with a wood texture, and the product can be obtained simply by a printing process without requiring special processes, making it suitable for mass production. There is.

[Brief explanation of drawings]

1 to 5 are schematic diagrams showing the configuration of each step of the method of the present invention. Explanation of the symbols representing the main parts of the figure: 1...base plate, 2...ground coat layer, 3...
Base pattern, 4...Finish pattern, 5...Full surface coating layer, 6...Matte transparent resin film covering the spring wood portion.

Claims (1)

[Claims] 1. On the pretreated base plate, coat the entire surface with matte paint or ink to form a ground coat layer, and print the base pattern of the wood grain using gloss or matte ink on the ground coat layer using a blurring plate. Then, a finishing pattern is printed on the base pattern using a tightening plate with gloss ink to form a wood grain pattern, and then the entire surface is coated with transparent gloss ink with a thermosetting resin as a binder, and then a thermosetting resin is coated on the entire surface. A method for manufacturing printed plywood, which comprises part-coating with a transparent matte ink using a resin as a binder to cover the spring wood portion of the wood grain pattern with a matte transparent resin film.