JPS6038136A - Preparation of decorative plywood - Google Patents

Abstract

PURPOSE:To obtain decorative plywood excellent in natural taste by a method wherein a synthetic resin sealer layer is provided on the surface of a specific base and embossed and then the embossed cavity is filled with extender contained colored paint, dried and finished. CONSTITUTION:The surface of the base composed of an agathis or other plate surface that is constant in ground color and poor in grain patterns such as conduit holes, pith lines, etc. is sanded to adjust the ground. Then, a synthetic resin sealer layer is provided on the surface adjusted to the ground and embossed to form the desired grain patterns or grain patterns are first formed by embossing and then a synthetic resin sealer layer is provided. Further, the cavity provided by this embossing process is filled and coated with extender contained colored coating material to remove the colored coating material applied to areas excepting the cavity and dried. Thereafter, transparent, finishing coating material is applied to this area to obtain the desired plywood.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing decorative plywood in which the inside of the embossed recesses is colored.

The conventional method for producing decorative plywood with this type of embossing is to attach a sliced veneer of natural wood to the plywood surface, and then insert the veneer into the recesses formed by the conduit holes, chain lines, etc. of the attached veneer. A method of coloring and painting is to apply decorative paper with a wood grain pattern printed on the surface of the plywood, embossing it in line with the conduit holes, chain lines, etc. of the printed wood grain pattern, and coloring the recesses. There are known methods to do this.

However, in the case of the former, since a veneer of natural wood is used, it is not possible to obtain the same product, and moreover, the color tone is not the same.<<
However, it is expensive and has the disadvantage that it cannot achieve the desired purpose. However, in the latter case, since it is paper pasted, it lacks a natural appearance and has the disadvantage that it is difficult to synchronize the printed wood grain pattern of the decorative paper with the embossing.

The purpose of the present invention is to eliminate these drawbacks, and to produce plywood whose surface is relatively uniform in color and has fewer wood grain patterns such as conduit holes and chain lines. Provided is a method for producing decorative plywood having an embossing process that allows a desired wood grain pattern to be easily obtained by embossing by using it as a base material, and also has an excellent natural taste that allows the texture of natural wood to be used as is. This is what we provide.

Another object of the present invention is to provide a single layer of synthetic resin sealer on the surface of the embossed wood grain pattern;
Alternatively, by applying a layer of synthetic resin sealer on the surface and then applying a wood grain pattern by embossing, it is possible to prevent the recesses formed by embossing from being restored, and also to prevent the paint from being absorbed into the base material by colored painting or topcoating. To provide a method for producing decorative plywood having an embossed finish, which can prevent damage to the formed wood grain pattern by preventing the elution of resin components from the base material due to paint solvents, etc.

That is, the present invention uses plywood as a base material whose surface is a board surface with a relatively constant color and few wood grain patterns such as conduit holes and medullary lines, and sands the surface of the base material. After adjusting the base by applying a layer of synthetic resin sealer to the surface and forming a wood grain pattern by embossing, or forming a wood grain pattern by embossing the surface and applying a layer of synthetic resin sealer, Furthermore, a colored paint containing an extender pigment is applied to the surface so as to fill the recesses formed by embossing, and the colored paint applied to the smooth surface area excluding the inside of the recesses is removed before the colored paint dries. The gist of this invention is to provide a method for producing decorative plywood with embossing, which is characterized by removing the embossed plywood, drying it, and then applying a transparent top coat to the surface.

Furthermore, to explain the present invention in detail, as a base material for decorative plywood, a board having a relatively constant color and a board surface with few wood grain patterns such as conduit holes and plywood lines, such as a board made of coniferous wood. By using plywood with a board made of South Sea wood such as Agassis wood as the top board, the fabric color and wood grain pattern on the surface of the base material do not harm the wood grain pattern on the surface, while the fabric color and wood texture pattern of natural wood are used. That! F. To be used as part of the wood grain pattern to be applied.O First, the surface of the base material is sanded to adjust the base.
For example, sandpaper with a grain size of #320 to #400 is used.

Apply a transparent or semi-transparent urethane resin sealer on the surface of the base material with adjusted base material using a low/L/:I-tar i, etc. to provide one layer of synthetic resin sealer. Form the desired grain pattern by embossing. Either of the step of applying one layer of the synthetic resin sealer and the step of embossing the wood grain pattern may be performed first. If a single layer of synthetic resin sealer is applied first, it is desirable to emboss the wood grain pattern when the synthetic resin sealer is semi-dry. This single layer of synthetic resin sealer prevents deformation of the recesses formed by embossing, that is, the wood grain pattern, and also prevents the subsequent coloring and top coat from being absorbed into the base material. It also prevents the resin content (tarnish) from leaching from the base material due to paint solvents, etc., and prevents damage to the wood grain pattern that is formed.

Next, using a roll coater or reverse coater, fill the recesses formed by embossing with a coloring paint made by adding an extender pigment to a commonly used urethane resin-based or two-layer coloring paint. After applying the colored paint as described above, before the colored paint dries, use a cloth, sponge, or roll equipped with plastic to remove the colored paint applied to the smooth surface area except for the recesses. dry. Therefore, if the colored paint exists only in the recesses formed by embossing, it will give a three-dimensional effect to the wood grain pattern formed by embossing.

Then, a transparent top coat consisting of a polyester resin sanding sealer, urethane resin flat clear, amino alkyte resin paint, etc. is applied on top of this using a roll coater, and this is dried to finish. When the formed embossed decorative plywood is used for woodworking purposes such as furniture manufacturing, the surface to be coated with a sanding sealer is polished with sanding paper, and when the top coat is coated with flanto clear, a release agent is applied. Care must be taken to ensure a good finish when painting later, such as by using a paint that does not contain any of the above.

Example 1 The surface of a plywood whose top plate was made of Agassiz material was sanded with a wide belt sando with a finishing sando belt with a grain size of No. 400 to adjust the base.

A transparent urethane resin sealer was applied to the surface of the plywood with this base prepared at a rate of 55 I/shaku using a roll coater, dried at 60°C for 3 minutes, and the applied synthetic resin sealer was semi-dry. After forming a wood grain pattern consisting of recesses corresponding to conduit holes, chain lines, etc. with an embossing roll, the synthetic resin sealer is completely dried by heating at 80° C. for 5 minutes.

Next, a urethane resin-based colored paint (coloring pigment silver part by weight, extender pigment I part by weight, urethane resin 40 parts by weight, solvent 10 parts by weight) was applied using a reverse coater into the recesses formed by the embossing roll, and immediately After removing the colored paint applied to the smooth surface using a roll wrapped around the recess, the colored paint in the recess is heated at 80° C. for 5 minutes to dry.

Furthermore, a urethane resin flat clear that does not contain a template agent is applied to the top surface using a roll coater.
was applied and dried at 80° C. for 6 minutes to give a topcoat finish and obtain a decorative plywood with an embossed finish.

Example 2 The surface of a plywood whose top plate was made of Agassiz material was sanded with a wide belt Sangu with a finishing Sangu belt grain size of No. 400 to adjust the base.

After forming a wood grain pattern consisting of recesses corresponding to conduit holes, chain lines, etc. on the surface of the plywood prepared with this base using an embossing roll, a milky-white translucent polyurethane resin sealer was applied using a roll coater to form a wood grain pattern consisting of concave areas corresponding to conduit holes, chain lines, etc., using a roll coater. Apply 2 1-
,． Heat and dry at 80°C for 10 minutes.

Next, add car-based colored paint (coloring pigment and parts by weight, 30 parts by weight of extender pigment, 40 parts by weight of Lano Car Type Face, and 10 parts by weight of lacquer thinner). Apply to
Immediately after removing the colored paint applied to the smooth surface using a roll wrapped with cotton cloth, the colored paint in the recesses is heated at 80° C. for 5 minutes to dry.

Furthermore, apply polyester resin-based sandink sealer Worol Coater Niyotero g/Shaku 2 on the surface,
After drying at 80° C. for 6 minutes, it was polished using a sander with a grain size of No. 600 to obtain a decorative plywood with an embossed finish.

patent applicant Fujimi Kasei Co., Ltd.

Claims (1)

[Claims] The base material is plywood with a relatively constant color and few wood grain patterns such as conduit holes and chain lines as the base material, and the surface of the base material is sanded to adjust the base material. , by applying a layer of synthetic resin sealer on the surface and then forming a wood grain pattern by embossing, or by forming a wood grain pattern by embossing on the surface, applying a layer of synthetic resin sealer, and then applying a layer of synthetic resin sealer to the surface. A colored paint containing extender pigments is applied to fill the recesses formed by embossing, and the colored paint that has been applied to the smooth surface area except inside the recesses is removed before the colored paint dries. A method for producing decorative plywood with embossing, which comprises drying the plywood and applying a transparent top coat to its surface.