JPS6049109B2 - Manufacturing method of decorative plywood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing decorative plywood, and its purpose is to have a unique silk luster on the surface of the plywood and to create a design effect by applying a three-dimensional pattern. The purpose is to provide high quality decorative plywood.

Conventional decorative methods for this type of decorative plywood include pasting a decorative cloth sheet on the surface of the plywood (the former); a synthetic method in which a cloth sheet or metal foil is pasted and a wood grain pattern is backprinted using adhesive; A method such as pasting a resin sheet (the latter) was used.

However, in the former case, since the cloth sheet is made of woven fabric, it has a soft finish, but the cloth texture due to the weave is unavoidable, and the surface has no change, resulting in a monotonous decorative surface. In the latter case, since the synthetic resin sheet layer is formed on top of the cloth sheet or metal foil, there is no difference in the gloss of the cloth sheet or metal foil and that of the wood grain pattern, so there is a tendency that there is little change. be. In particular, those formed with metal foil exhibited a metallic luster, and it was not possible to obtain a decorative surface that closely resembled the phase pattern surface luster of natural wood. The present invention is an attempt to solve the problems of the conventional decorative plywood of this type as described above. The gist of the present invention is to provide a method for manufacturing decorative plywood in which a sheet-like material 3 in which a large number of transparent or semi-transparent fibrous materials S are arranged in parallel in the same direction is aligned with the fiber direction of the fibrous materials S on the surface of the plywood. Attach with adhesive 2 so that the fiber direction of
- A wood grain pattern 4 made of printing ink and a conduit groove pattern 5 made of printing ink containing a foaming agent are sequentially printed on the surface of the sheet-like material 3, and - A transparent or translucent top coat 6 is applied to the surface. ,●The conduit groove pattern 5 is formed into a foamed convex portion 7.

The details will be explained below.

In the drawing, reference numeral 11 indicates a plywood board, and the adhesive 2 is applied to the entire surface thereof using a coating device such as a roll coater or a flow coater.

The surface of plywood 1 is coated with filler paint, sealer paint, etc. as necessary.
Appropriate surface treatment such as polishing or undercoating may be performed, but it is preferable to leave the surface bare.The adhesive 2 is appropriately selected from commonly used natural polymers, semi-synthetic polymers, and synthetic polymers. .

2 A sheet-like material 3 made of a large number of transparent or translucent fibrous materials arranged in the same direction is pasted by hand or with a laminator so that the fiber direction of the fibrous material S and the fiber direction of the surface of the plywood 1 are in the same direction. Attach using a device etc.

The sheet material 3 consists of a large number of colorless or colored transparent or translucent synthetic resin fibers, monofilaments such as natural fibers, twisted yarns, and branched fibers S, which are arranged in a fixed direction and then glued together. or, in the case of thermoplastic resin, by heat-sealing to form a sheet. Note that the fibrous material S may be arranged in a single layer, in a plurality of layers, or in random layers. There is no problem even if a lining paper is attached to the back side of the sheet-like material 3. Alternatively, the adhesive 2 may be applied to the back surface of the sheet-like material and adhered to the surface of the plywood 1. By pasting the fiber direction of the surface of the plywood 1 and the fiber direction of the sheet-like material 3 in the same direction, a part of the sheet-like material is buried in the conduit groove recess on the plywood surface, forming a recess on the surface of the plywood 2, that is, a pseudo conduit groove g. be done.

3. If necessary, apply a synthetic resin sealer or Lutzker sealer to the surface of the sheet-like material 3 to loosen the fibrous material S,
It may also prevent fuzzing, breakage, etc.

2.4 On the sheet material 3, gravure ink, offset ink,
The pattern pattern 4 is printed using printing ink such as screen ink using a printing device such as a gravure printer, an offset printer, or a screen printer.
3C゛5 Next, using a printing ink such as gravure ink, offset ink, screen ink, or synthetic resin paint to which a foaming agent is added, printing is carried out using printing equipment such as a gravure printer, offset printer, or screen printer. 3:) A conduit groove pattern 5 synchronized with the pattern 4 is printed and formed. As the blowing agent, a pyrolytic blowing agent, an acid, or a reactive blowing agent is used, preferably by heating, (4
Select organic or inorganic substances such as nitroso compounds, a40zo compounds, aromatic hydrands, bicarbonate peroxides, azide compounds, etc. that decompose and generate inert gas by heating (0-200℃) use.

Acid-reactive foaming agents are difficult to foam uniformly, and moreover, foams are formed in a small size. 6 Next, a top coat 6 such as a transparent or translucent synthetic resin paint or lacquer is applied to the surface using a coating device such as a roll coater or a flow coater.

When the conduit groove pattern 5 is formed using a printing ink to which an acid-reactive foaming agent is added, an acidic curing agent is added to the top coat 6 to react and foam the foaming agent. Further, instead of applying the top coat 6, a thermoplastic resin film may be applied and heated and melted. 7. Next, it is heated and dried using a drying device such as a hot air dryer or an infrared dryer.

By this dry heating, the pyrolytic foaming agent in the printing ink that forms the conduit groove pattern 5 is decomposed to form the foamed convex portions 7.

Although the foamed convex portions may be formed before applying the top coat 6, it is necessary to apply the paint using a flow coater, spray, etc. to prevent the foamed convex portions 7 from being destroyed. 8. It is also possible to form a wood grain pattern using ordinary printing ink or a mottled pattern using printing ink added with a foaming agent to form a conduit groove pattern on the surface of the sheet-like article.

The effects of the present invention are summarized as follows.

:a) A wood grain pattern 4 made of ordinary printing ink and a conduit groove pattern 5 made of printing ink containing a foaming agent are formed on a sheet-like material 3 in which fibrous materials S are arranged side by side.
Due to the diffused reflection of light, this part exhibits a strong luster similar to silk luster, and exhibits a luster closely resembling that of autumn or spring elements in wood grain, for example.

Depending on the amount of printing ink applied to the woodgrain pattern 4 portions, the reflection of light on the sheet-like material 3 is suppressed, resulting in a light gloss that closely resembles wood grain, for example. Further, the conduit groove pattern 5 or the mottled pattern becomes foam convex portions 7, forming a three-dimensional pattern and the surface thereof becoming porous, so that the diffused reflection of gloss becomes too strong, resulting in a matte state.

Further, the sheet-like material 3 partially sinks into the conduit groove on the surface of the plywood 1 to form a pseudo conduit groove g. The combination of the strong luster of these sheet materials 3, the pale luster of the pseudo conduit grooves g, the woodgrain pattern 4, and the matte three-dimensional pattern of the foamed convex portions 7 results in a decorative pattern that closely resembles natural wood, and has a high design quality. becomes extremely high. (b) In particular, since the gloss of the foamed convex portion 7 is erased, it looks like a concave groove due to the difference in gloss from other parts, and is expressed as a conduit groove or a mottled pattern in the grain of wood, creating a decorative pattern. Make it even more appealing.

Furthermore, when a pseudo conduit groove g is formed, the pseudo conduit groove g
The pale luster of the foamed convex portion 7 contrasts with the matte luster of the foamed convex portions 7, forming a deep decorative surface.

J Example 1●
Apply 70yI of acetic acid adhesive to the surface of 5mIm plywood without applying any surface treatment.

●A laminator is used to laminate sheets of Tetron fibers arranged in the same direction on the surface of plywood coated with adhesive.

At this time, the fiber direction of the surface plate of the plywood and the fiber direction of the sheet-like material are made to be the same direction. ●Next, a saw wood grain pattern is printed on the surface using printing ink colored in a matching pattern color using a gravure offset printing machine.

●Next, a conduit groove pattern is printed using a gravure offset printing machine using printing ink containing a heating foaming agent.

●Next, apply 40y of transparent urethane resin top coat to the entire surface.
I? After coating and impregnating, heating is performed at 80°C for 3 minutes and 120°C for 2 minutes using a hot air dryer to foam and raise the conduit groove pattern and dry the top coat.

As described above, decorative plywood having a surface that closely resembles natural wood was obtained.

Example 2 ●47T1.1TrL. Apply 50 yId of vinyl acetate adhesive to the surface of the plywood without applying any surface treatment.

●A laminator is used to laminate sheets of rayon fibers arranged in the same direction on the surface of plywood coated with adhesive.

●At this time, the fiber direction of the plywood surface board and the fiber direction of the sheet material should be in the same direction.

●Next, a wood grain pattern is printed on the surface using printing ink colored in the wood grain pattern color using a gravure offset printing machine.

●Next, a conduit groove pattern is printed using a gravure offset printing machine using printing ink containing an acid-reactive foaming agent.

-Next, after applying 40f1TT1 of urethane resin topcoat with an acid curing agent added to the entire surface, heat drying at 100°C for 5 minutes using a hot air dryer to foam and raise the conduit groove pattern and dry.

In the above manner, decorative plywood having a surface that closely resembles natural wood was obtained.

[Brief explanation of drawings]

Figure 1: Cross-sectional view of decorative plywood obtained by the method of the present invention, Figure 2
Figure: Also a partial perspective view. 1: plywood, 2: adhesive, 3: sheet-like material, 4: wood grain pattern, 5: conduit groove pattern, 6: top coat, 7: foam convex part,
g: pseudo-conduit groove, S: fibrous material.

Claims (1)

[Claims] 1● A sheet-like object 3 consisting of a large number of transparent or translucent fibrous objects S arranged in the same direction is glued with an adhesive 2 so that the fiber direction of the fibrous objects S and the fiber direction of the plywood surface are in the same direction.
● sequentially print a wood grain pattern 4 using normal printing ink and a conduit groove pattern 5 using printing ink containing a foaming agent on the surface of the sheet-like material 3; A method for manufacturing decorative plywood, characterized in that a transparent topcoating material 6 is applied to form conduits and groove patterns 5 into foamed convex portions 7.