JPH0716984A - Specially processed decorative plywood - Google Patents

Abstract

PURPOSE:To provide a specially processed decorative plywood wherein an appearance performance can be raised without giving a damage to a texture of wood which a low class wood essentially has even in a cheap and specially processed decorative plywood using a so called low class wood instead of an unartificial tree and an excellent finishing with respect to a decorative performance can be executed. CONSTITUTION:A characteristic is given by the fact that on a surface of an ordinary plywood (which is composed of 2 and 3), thin paper 11 having a semi- transparent performance with inclusion of non-bleached pulp is laminated by an adhesive agent 12 in which polishing powder is uniformly mixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specially processed decorative plywood mainly used for furniture fabrication materials, interior materials for houses, and the like.

[0002]

2. Description of the Related Art Conventionally, as a material suitable for the above-mentioned use, there is a so-called natural wood decorative plywood (so-called veneer). This is a method in which a thin veneer, which is an extremely thin slice of a carefully selected natural wood plate, is peeled off in an extremely thin slice onto the surface of a normal plywood plate made by pasting a plurality of veneers.

This veneer has a beautiful grain pattern called "grain pattern" and "grain pattern", which is peculiar to excellent natural wood, on the surface of its thin veneer, and its hue is almost the same throughout. As a result, it looks good and has a high-class feel, and has a high commercial value.

By the way, in recent years, the shortage of excellent natural trees has become serious. In addition, there is a global trend to actively use and save natural resources. Against this background, it has become difficult to maintain a stable supply of veneer and maintain an appropriate price.

In comparison with this, so-called lower grade wood, which is often used for veneered plywood and the like, has a stable supply amount and is inexpensive.

[0006] Therefore, it is considered industrially advantageous to develop a specially processed decorative plywood using this lower grade wood instead of the excellent natural wood.

[0007]

However, in the case of the lower grade wood, unlike the excellent natural wood, the beautiful wood grain pattern is often not clearly shown. In addition, there are many cross-sections and conduit openings of conduits of various sizes and color depths on the surface, and the hue is often different in some parts, and the overall appearance is good. Is hard to say.

[0008] Therefore, it is difficult to expect a high-quality appearance like a conventional veneer in a specially-processed decorative plywood in which a lower-grade wood is simply replaced in place of an excellent natural wood, and it is inexpensive, but a commercial product. There was a problem that the value was low.

Further, as mentioned above, in addition to the presence of conduit openings scattered on the surface of the lower grade wood, many coarse fibers are often fluffed. For this reason, there is a problem that even if the surface is polished before finishing such as painting, it is difficult to favorably perform coloring and painting due to the occurrence of so-called raise grains.

The present invention was created in order to solve these problems, and it is an inexpensive specially-processed decorative plywood that uses so-called lower-grade wood instead of natural wood, but it also has the inherent properties of lower-grade wood. It is an object of the present invention to provide a specially-processed decorative plywood that can improve its appearance without impairing the texture and can also have a good cosmetic finish.

[0011]

In order to solve the above-mentioned problems, the specially-processed decorative plywood of the present invention contains unbleached pulp on the surface of ordinary plywood with an adhesive in which abrasive powder is uniformly mixed. It is characterized by pasting thin paper with semi-transparency.

[0012]

The thin paper used for the specially processed decorative plywood of the present invention contains unbleached pulp. Since the pulp is made from wood, the surface of plywood and the tissue paper are usually light brown in color. This light brown color of the thin paper serves as a kind of filter to make the cross section of the conduit, the mouth of the conduit, and the various hues that are usually shown on the surface of the plywood inconspicuous, and improve the overall appearance.

Further, since the abrasive powder is uniformly mixed in the adhesive for sticking the thin paper, it works to fill or cover the minute and miscellaneous conduits and conduit openings on the surface of the lower grade wood. . Since the abrasive powder has the same hue as the unbleached pulp and the lower-grade wood, which are a part of the raw material for the thin paper, the hues appearing on the surface of the thin paper are synchronized.

Further, the fluffing on the surface of the lower grade wood can be suppressed by the abrasive powder, and the sanding at the time of the finish of the makeup can be facilitated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the specially processed decorative plywood of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a specially processed decorative plywood (hereinafter simply referred to as a decorative plywood), which has a surface material 3 on the surface of a base material 2.
The basis is ordinary plywood that is made by stacking and laminating.

The base material 2 is formed by bonding a back single plate 4 and a middle single plate 5 with a casein glue (adhesive) 6. Both the back veneer 4 and the middle veneer 5 are obtained from lauan wood, which is a lower grade wood, and are laminated so that their respective fibrous materials are orthogonal to each other.

The surface layer material 3 is a thin veneer that is thinly sliced off from a lauan type wood by a rotary lace (a wood processing machine), and its fibrous material is orthogonal to that of the middle veneer 5. It is attached to the veneer 5 by a casein glue 6.

The surface of the surface layer material 3 is polished by a polishing machine such as a scraper or a belt sander.

On the surface of the surface layer material 3 after the surface polishing, as shown in FIG. 5, the conduits 7a and the conduit openings 7b are present in a relatively random manner, and the color patterns 8a, 8b are uneven.
Are also scattered.

Numeral 11 is a thin paper containing about 30 to 60% of unbleached pulp (mechanical pulp) and having a basis weight of 40 g / m ² or less, and its front side is smoother than the back side (surface layer 3 side). Smooth surface is processed.

The thin paper 11 has a light brown color and is semi-permeable, and the light brown color is similar to the hue of the surface layer material 3.

The thin paper 11 is attached to the surface layer material 3 with a vinyl acetate adhesive 12 applied over the entire surface of the surface layer material 3.

Abrasive powder 13, which is widely used for adjusting the base material of wood, is uniformly mixed in the adhesive 12.

When the thin paper 11 is impregnated with the adhesive 12, the light brown hue of the thin paper 11 becomes light, but the thin paper 11 is not completely transparent due to this.
Its semi-transparency has a light brown hue.

Reference numeral 14 is a clear lacquer (transparent coating layer) as a cosmetic finish, which is applied over the entire surface of the thin paper 11.

Next, the operation of the decorative plywood 1 having such a structure will be described.

The thin paper 11 attached to the surface of the surface layer material 3 contains unbleached pulp. Since the raw material of pulp is wood, the surface of the surface layer material 3 and the thin paper 11 have the same light brown color. This light brown phase of the thin paper 11 serves as a kind of filter to make the conduit 7a, the conduit port 7b and the color patterns 8a, 8b appearing on the surface of the surface layer material 3 inconspicuous and improve the overall appearance. ing.

That is, the thin paper 1 impregnated with the adhesive 12
1 is a state in which the natural hue of the surface layer material 3 as Lauan wood is not significantly impaired, and due to its semi-permeability, the conduit 7a and the color patterns 8a, 8b of the surface layer material 3 have a size and a density within a certain range. It is shown on the surface of the surface layer material 3 while restraining it. Therefore, as shown in FIG. 2, on the surface of the thin paper 11, a new conduit 7c or a color pattern 8c appears in which the width of variation in size and shade is suppressed to be small and the degree of unification in pattern is alleviated. It will be.

Further, since the abrasive powder 13 is uniformly mixed in the adhesive 12 for sticking the thin paper 11 to the surface layer material 3, as shown in FIG. 3, minute and miscellaneous conduits 9 and conduit ports 10 are provided. It serves to fill or cover and hide.

Moreover, since the abrasive powder 13 has the same hue as the unbleached pulp and the surface layer material 3 which are a part of the raw material of the thin paper 11, the hues appearing on the surface of the thin paper 11 are synchronized. ing.

Further, as shown in FIG. 4, the coarse fibers 21 on the surface of the surface layer material 3 and the raise grains 22 generated in the vicinity of the conduit port 10 are prevented from fuzzing by the abrasive powder 13 in the arrow direction. . As a result, the surface layer material 3
The surface of the can be sanded easily, and good cosmetic finish can be obtained.

Recently, a veneer with an extremely thin veneer (about 0.2 mm) has been developed in response to a shortage of supply of excellent natural wood. There is also a case where the unnecessary skin is exposed on the makeup surface. This problem can be alleviated by applying the thin paper or the adhesive in the present invention.

In this embodiment, Lauan wood is used as the lower grade wood, but there are various kinds such as imported wood such as Apiton and Tangier, conifer such as hiba and cedar, and hardwood such as beech.

[0035]

As described above, according to the present invention, the so-called low-grade wood is used instead of the natural wood, and it is an inexpensive specially processed decorative plywood, but the original wood texture of the low-grade wood is impaired. It is possible to provide a specially-processed decorative plywood that can improve its appearance without having to do so and can also have a good cosmetic finish.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a specially processed decorative plywood according to an embodiment of the present invention.

FIG. 2 is a plan view showing a new pattern appearing on the surface of the thin paper.

FIG. 3 is an enlarged cross-sectional view of the adhesive layer.

FIG. 4 is an explanatory view showing the functions of the adhesive and the thin paper.

FIG. 5 is a plan view showing the surface of a surface layer material obtained from lower-grade wood.

[Explanation of symbols]

 1 Specially processed decorative plywood 2 Base material 4 Back veneer 5 Medium veneer 3 Surface layer material 11 Thin paper 12 Adhesive 13 Abrasive powder 14 Clear lacquer (decorative finish)

Claims (1)

[Claims] 1. A specially-processed decorative plywood, characterized in that a thin paper sheet containing unbleached pulp and having semi-permeability is attached to the surface of a normal plywood sheet by an adhesive in which abrasive powder is uniformly mixed.