JPS59227453A - Laminated board having solid pattern - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is suitable for decorative boards mainly used for architectural interiors, furniture, etc., when a particularly deep three-dimensional pattern is desired, without requiring sophisticated work such as carving, and without damaging the texture of the wood. The purpose of the present invention is to provide a laminate that can meet these demands at low cost without any hassle.

The present inventors previously invented a special plywood to which three-dimensional patterns can be easily added, and filed a patent application. Later, as a result of research and development to provide an even cheaper special plywood, we developed a laminate that retains the physical properties of wood and satisfies its strength and workability even though it has a deeper three-dimensional pattern than previous special plywood. I ended up inventing it.

Conventionally, adding three-dimensional patterns to decorative plywood has been done by using a powerful mold and applying high pressure to make use of the plasticity of the wood itself. However, with this method, it is very difficult to add a pattern with a height difference of 1 mm or more. When a deep three-dimensional pattern is desired, engraving is performed using a machine such as a router.

Under such circumstances, the present inventor has developed a thermoplastic resin and wood powder.
A mixture of granular or fibrous material, that is, a plate-like material made of a woody mixture, is used as a substrate, and paper, veneers, etc. are adhered to the light or front and back surfaces of the substrate to apply decoration, and to maintain the strength as a decorative board. Then, if a free three-dimensional pattern is pressed using a metal mold, wooden mold, or resin mold under heating conditions, the substrate of the woody mixture plasticized by heating will flow according to the mold, so that the plate on the surface will be Since it can be freely formed as long as it does not break, decorative boards with deep three-dimensional patterns can be produced easily and inexpensively.

Since the woody mixture used in the present invention is made by hardening wood powder or the like with a thermoplastic synthetic resin serving as a binder, it exhibits physical properties similar to those of wood.

For example, the specific gravity is 0.6-08, the hygroscopicity can be freely adjusted by adjusting the resin mixing ratio, the workability is easy to use with a saw, and wood flour is inexpensive and even waste wood can be used as a raw material for wood flour, so wood resources can be reduced. It also helps you save money. Here, the substrate made of woody mixture will be explained. As the thermoplastic synthetic resin, polyolefin-based, vinyl chloride-based, polystyrene-based, polyurethane-based resins, or chemically modified polymers or copolymers thereof are used. Wood powder, granules,
The fibrous material may be commercially available wood flour, coarse wood flour, crushed wood bark used for fiberboard, or wood fibers such as pulp. The resin is preferably in the form of powder, and the mixing rate is in the range of 20% to 50% by weight. After the resin and wood flour are thoroughly mixed, the mixture is heated and pressed to a certain thickness, and a plate-shaped wood mixture is obtained. The thickness is completely free, but it is usually better to set it to 2.0 mm IJ or more. It is desirable that the woody mixture obtained here has a resin ratio as low as possible. For example, when mixing polyolefin resin and wood flour, the resin ratio is at the lower limit of 20%, and if it is lower than this, fluidity during molding will be lost. The woody mixture with a lower resin ratio in this way has a specific gravity of 0.6~
It falls within the range of 0.8 and has good workability without losing its texture as wood.

In addition, excessive heating and pressurization destroys the air bubbles in the wood, increases the specific gravity, and impairs the texture of the wood.

Next, the structure of the product of the present invention will be explained. Although the product of the present invention has a deep three-dimensional pattern, it must have a flexible surface so that it can fully fit into a mold for molding the three-dimensional pattern. For this reason, the board used for the surface trap is made of flexible wood such as beech, cherry, or cypress, and has a thickness of 0.
A value of about 2 to 0.3 mm is good. As described above, the substrate for the wood mixture is a mixture of a thermoplastic synthetic resin and wood powder or fibrous material, which is sufficiently mixed and heated and pressed to form a plate. When using it as a furniture material, it is best to have a thickness of 4 to 6 mm. The back side is the same as the front side, so it is desirable to glue the board together for strength balance.
When using the product of the present invention by attaching it to a base material such as a wall, there is no need to attach a plate to the back surface. Also, if it is not necessary to apply any makeup to the back side, it is sufficient to simply adhere parchment paper to maintain strength. Depending on the shape of the three-dimensional pattern, a tensile force may be applied to the surface plate during the forming process, causing the plate to break. To prevent this phenomenon, by sandwiching paper under the surface plate, the plate can be given tensile strength and a deep three-dimensional pattern can be formed easily. Furthermore, by using a structure in which a plurality of laminates are stacked alternately so that the fiber directions are perpendicular to each other, it is possible to prevent the laminates from breaking during the forming process and to improve the strength of the laminate.

Next, the present invention will be specifically explained using examples.

[Example 1] First, as a substrate for a wood mixture, 40 parts of powder of vinyl chloride-vinyl acetate copolymer (Kaneka RB-410. Vinyl acetate content 15%) and wood powder cellulosin Na45 (manufactured by Kajino Sangyo Co., Ltd.) were used. Tumble with 60 parts of water (10%)
After mixing thoroughly using
/ctl, heated and pressurized for 7 minutes at a temperature of 160°C, degassed, cooled, and taken out from the mold to obtain a plate-shaped wood mixture substrate 2 having a thickness of 4 mm. Next, a beech board 1 with a thickness of 0.3 mm was temporarily adhered to both sides of the substrate using a commercially available synthetic rubber adhesive, and was pressed under a pressure of 1.5 mm using a heat press.
kg/d, heated at a temperature of 120°C for 5 minutes, then taken out, immediately placed in a cold press equipped with a tortoiseshell pattern mold, pressed at a pressure of 5 and 97 cd, cooled and removed, with a height difference of about 2 mm. A beech wood laminate 3 having a beautiful three-dimensional tortoiseshell pattern was obtained.

[Example 2] High-density polyethylene as a substrate for woody mixture, HiZEX 82000F (powder) manufactured by Mitsui Petrochemical Industries, Ltd.
30 parts and wood powder cellulosin IM45 manufactured by Kajino Sangyo Co., Ltd.
(Moisture 10%) 70 parts was heated and pressed at the same pressure and temperature as in Example 1 to obtain a substrate 2 of a woody mixture with a thickness of 5 mm. Next, a lauan plate 1 with a thickness of 0.6 mm was placed as a backing material, and a film of OMP, HA-40B manufactured by Tonen Petrochemical Co., Ltd. (40μ thick) was then used as an adhesive.
), and on top of that, layer the substrate 2 of the woody mixture obtained earlier,
Furthermore, the above-mentioned HA manufactured by Tonen Petrochemical Co., Ltd. as an adhesive
-Parchment paper 4 (50
y/yr2) f: Mne, Sonoue K A 0.2 mm thick cherry blossom board 1 is pasted using a commercially available synthetic rubber adhesive,
Place this laminate as it is in a heat press and set the pressure to 1.59.
/cd, heated at a temperature of 130°C for 7 minutes, then taken out, immediately placed in a cold press with an arabesque pattern attached, pressed at a pressure of 2.5 kg / cd, cooled and taken out, height difference 3. A beautiful core material laminate 3 with a millimeter-sized arabesque pattern embossed was obtained.

[Example 3] Tonen Petrochemical Co., Ltd. OMP, HA-
While sandwiching the 40B films, two cedar boards 1 each having a thickness of 0.3 mm were stacked one on top of the other so that the weaving directions were perpendicular to each other. A strong cedar wood laminate 3 having a beautiful arabesque pattern was obtained.

[Example 4] The above-mentioned OMP, H/1740 manufactured by Tonen Petrochemical Co., Ltd. was applied to the surface of the substrate 2 of the woody mixture obtained in the same manner as in Example 2.
'While sandwiching the FJ film, stack two cedar boards 1 with a thickness of 0.3 mm so that the fiber directions are perpendicular, and on the back side, sandwich the same HA-403 film as above and put parchment paper 4. (5097M2) was stacked and otherwise the same procedure as in Example 2 was carried out to obtain a strong cedar wood laminate 3 having a beautiful arabesque pattern.

[Example 5] High-density polyethylene as a substrate for woody mixture, HiZEX 82000F (powder) manufactured by Mitsui Petrochemical Industries, Ltd.
30 parts and wood powder Celluloshino N114 manufactured by Kajino Sangyo Co., Ltd.
5 (moisture 10%) and 70 parts using a tumbler, and then fluororesin processing was carried out.Place parchment paper (50 g/M) on the bottom of an aluminum form and pour the mixture on top. Pour it evenly, layer the same parchment paper on top, and use a heat press to press 5 kg/
C1i, heated and pressurized for 7 minutes at a temperature of 160°C, deaerated and cooled, and taken out from the mold, parchment papers 4, 4 were adhered to both sides of the board-shaped wood mixture substrate 2 with a thickness of 4 mm. I got what I wanted.

Next, coat both sides of this board with a thickness of 0.3 mm! Using a commercially available adhesive, temporarily bond two Japanese cypress wood boards 1 with the fiber directions perpendicular to each other, and heat press L/S'1.
Pressure 1.5 kg/clt, temperature 130
After heating for 7 minutes, the mold was immediately attached, placed in a girder cold press, and heated to a pressure of 5k (j/cyA).
Embossing was carried out using a cypress machine, and when the material was cooled and taken out, a laminate of Japanese cypress wood with a beautiful three-dimensional tortoiseshell pattern with a height difference of about 2 mm was obtained.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
FIG. 2 is a perspective view of the embodiment, FIG. 2 is an enlarged sectional view of the suction part, and FIGS. 3 to 6 are enlarged sectional views of essential parts showing other embodiments. 1...Plate, 2...Substrate, 3...Laminated board, 4...Paper 1 Figure 3 Figure 5'' Figure Z + 2. Mouth invitation +l 6 Figure 1 Te

Claims (3)

[Claims] (1) One or more attached plates are adhered to the surface or both the front and back sides of a substrate made of a mixture of thermoplastic synthetic resin and wood powder or fibrous material (wood mixture), and under heating conditions A laminate plate with a three-dimensional pattern stamped with. (2) On the surface of a substrate made of a mixture of thermoplastic synthetic resin and wood powder or fibrous material (wood mixture), one or more sheets are attached, and paper is glued on the back surface. , a laminate with a three-dimensional pattern that is molded under heating conditions. (3) Paper is glued to both the front and back sides of a substrate made of a mixture of thermoplastic synthetic resin and wood powder, grains, or fibers (wood mixture), and one or more attached boards are attached on top of it. A laminate with a three-dimensional pattern that is bonded and pressed under heated conditions.