JPS58112734A - Surface treating method for woody board - 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 relates to a surface treatment method for a wooden board (1:t
- After preheating, the thermoplastic resin powder (2) is completely adhered to the surface of the wooden board 11), and then this wooden board is heated and pressed by passing it through a hot roller (3) in the dark. The first invention is a method for surface treatment of a wooden board, and after preheating the wood board [Lt], a thermoplastic resin film (4) is attached to the surface of the wood board [Lt], and this wood board ICI heat roll (3 )
A surface treatment method for wood boards characterized by heat-pressing in the dark.A method for decorating the entire surface of wood boards such as sawn boards, plywood, other collected wood boards, laminated wood boards, etc., which is an invention of Kintei 2. Is it possible to improve the surface hardness by smoothing the surface? Conventionally, the surface of the wooden board was coated with a resin film, and the surface of the wooden board was coated with a resin film. It is desirable to use powder coating, which can automate painting and save labor because it does not require paint mixing or viscosity adjustment. After applying the powder paint using the painting method, the wood board is placed in a baking oven to bake the powder paint. If the powder is vaporized and vaporized, this vapor may cause blisters or cracks in the coating film formed on the surface of the wooden board, making it difficult to apply powder coating to the wooden board. Also, even when laminating a resin film on the surface of a wooden board, steam will be released from the wooden board due to the heating when the resin film is laminated to the wooden board, and the resin film will not be pasted to the wooden board in the same way as above. There is a risk of blisters and pinholes forming on the r-L food resin film.

The present invention has been made in view of the above points, and is
A surface treatment method for a wooden board that does not cause blisters or holes in the surface resin layer on the surface of the wooden board formed from adhesive resin powder or thermoplastic resin film due to the influence of moisture within the wood board. ? The purpose is to provide.

Below is the present invention! ! Explain in detail. To begin with, the first aspect of the present invention is to explain: A wood board such as sawn board, plywood, laminated wood board, laminated wood board, etc. is preheated in an infrared oven or at a gas temperature. During this preheating, much of the moisture contained in the wooden board 11) is evaporated, and the influence of moisture on the resin surface formed on the wooden board 11 can be reduced. After preheating in this way, the wooden board 1
+ fever 0Jt! I-type resin powder (2) is attached. To apply the thermoplastic resin powder (2) to the wooden board 11, use the electrostatic coating machine 16 using the electrostatic coating machine (6).
) and a positive high-voltage electrostatic charge *1 to the wood board [1), respectively, and heat or91i resin powder 12) was applied to the electrostatic coating machine (6).
) to electrostatically paint the wooden board Il: (11
31 (b)), next, air (1) is blown from below.
rL thermoplastic resin powder (flow in which two particles float) t81
This can be done by using a powder flow assisted dip coating method in which 1 liter of wooden board is immersed in water (Fig. 61 (e)). The body (2) is attached with softened or melted rice. In this way, before applying the thermoplastic resin powder (2), the adhesive (9) is completely applied to the surface of the wooden board f1:, so that the thermoplastic resin Powder 1
No. 21 is preferable from the viewpoint of adhesion with the surface resin layer (to). In this case, the adhesive (9) is also in powder form as shown in Figure 1 (b) above.
) and (e), it can be applied to wooden boards immediately after preheating by powder coating. Here, thermoplastic resin powder (
As for 2), it is best to use resins with high hardness, such as medium and low pressure polyethylene, HoriP 0 Hiren with high surface hardness, and hard polyvinyl chloride, to improve the surface hardness of wooden boards.
This is preferable from the point of view of improving r.

Mayu heat plastic resin powder 12) ranges from 20 mesh to 200
It is preferable to use mesh powder, and if the particle size is larger than 20 mesh, it will be easier to spread it evenly and heat it.
It becomes difficult to form a surface ITO resin layer of I-type resin powder +21 to a uniform thickness, and if the particle size is smaller than 200 mesh, it is difficult to handle and the workability is poor. On the other hand, as the adhesive (9), high pressure polyethylene, polyvinyl chloride, polystyrene, ethylene vinyl acetate copolymer, etc. can be used. Preferably, it is made into a copolymer to improve adhesion to wood boards.

In this way, thermoplastic resin powder (2
), then apply the hot roll (3).

As the heating roller (3), an elastic roller (3a) having an elastic layer (11) such as a silicone rubber layer on the outer peripheral surface and a metal roller (3b) made of art material or the like are used. That is,
These elastic rollers (3a) and metal rolls (3b floor Netomachi plastic resin powder 12) are heated to a temperature higher than the melting point,
The wood board with the holes to which the thermoplastic resin powder 12) is attached is first passed through an elastic roll (3a) (FIG. 1(d)). During this process, a wooden board is placed on the heated elastic roll (3a).
Heat-reducing resin powder 12 on the surface of the Z-block and the wooden board ゛l:
+ is a wood board that is melted and used as a surface resin layer 1101:
At this time, the wooden board 11) is also heated and some of the water molecules remaining in the wooden board 11) are vaporized and released as steam, causing surface blood to evaporate. Although it may affect the resin layer 4, the wooden board 11
:i Most of the moisture has been removed during preheating, so
This effect is small, and since the elastic roll (3a) elastically presses the surface of the surface resin layer, no blisters or cracks will occur on the surface resin layer due to the steam. After this, Table Ii] Wooden board on which the resin layer (lO) was formed (1:t) and the heated metal part roll (3b) I
The surface resin layer is smoothed through (Fig. 1(e)).
). It is preferable to use a plurality of metal rolls (3b). At this time, since the water that should be vaporized inside the wooden board 1 has already been removed, the water does not affect the surface resin layer in any way. Finally, the surface resin layer was cooled and solidified by passing a wooden board (1:1) through the water-cooled gold roll (Fig. 1 (11').
), a wooden decorative board surface-treated with a surface resin layer +101 as shown in FIG.
2 Preheating furnace (61) fc (%2 Figure (a)), then
1 (jL + Im wrapped around m OJ plastic resin film (
4) is fed onto the surface of the wooden board 'l: while unwinding it, and in this state the wooden board '1: is passed through the bone roll (3b) of the hot roll +3). The thermoplastic resin film (4) is preheated to a high temperature wood board 1! It softens when it is supplied to the surface of the wood board, but when heated by the elastic roll (3b), the thermoplastic resin film +4) is melted and fused to the surface of the wood board +tH. Form a resin layer (10). After this, heating member K[] −
b (3b) and cooling gold w40-JL+ (woody &
'lk can be completed. In this case, effects similar to those described above can be expected in the preheating and heating roll (3). Incidentally, as the thermoplastic resin film (4), a film of the same resin as the thermoplastic powder 12) can be used. Also, before pasting the heat 0J plastic resin film (4) on the wooden board 111, apply the adhesive (9) to the wooden board 111.
) may be applied to improve the adhesion between the wood board +11 and the thermoplastic resin film (4). If a three-layer film is used with the adjacent tree H1i, adhesive (91't:
There are no six outfits like this one.

As described above, according to the present invention, the water in the wood board is vaporized in advance by preheating the wood board, and the surface of the wood board with thermoplastic resin powder or thermoplastic resin film is coated with a low moisture content. It is possible to form a resin, and furthermore, by heating with a hot oil, the moisture content in the wood board can be further reduced, and by pressurizing with a hot oil, the surface resin can be formed during heating with a hot oil. This prevents blisters and pinholes from occurring in the layer, and as a result, the front and inner surfaces of the wood board can be treated with a beautiful and smooth surface resin layer without being affected by moisture inside the wood board. It is possible.

Next *invention? Example 1 of Kuga explained concretely using the example of Kuga
〉 Thin furniture plywood of 3 x 6 m and 2.7 m thick was placed in a preheating furnace with an infrared heater and a width of 1.5 m and a length of 5 m.
The surface of the plywood was preheated to 1120° C. by passing at a speed of min. Immediately after this, an adhesive resin powder (approximately 70 mesh) made of maleic anhydride (modified co-VjL) was electrostatically coated on the high-pressure polyethylene, and immediately after this, 3011 pieces of adhesive resin powder (approximately 70 mesh) was coated on the low-pressure polyethylene. Adhesive polymer (Atomer LB310 manufactured by Mitsui Petrochemicals) lent resin powder (
Approximately 70 meshes) were electrostatically coated. 71 f 5 m
The material was passed through an elastic roll made of silicone rubber heated to 170°C at a feed rate of 9/min, and then heated to 180°C.
A furniture board that is made by passing it through a wooden metal a@O-ru and then passing it through a water-cooled metal roll to form a surface resin layer on the plywood surface. It's 4. In this product, there were no blisters or bisholes in the surface resin layer, and the surface had a beautiful IfIsfL beak.

<Example 2> In the same manner as in Example 1, interior plywood having a size of 3 x 6 m and a thickness of 5.5 m was preheated. Immediately after this, it was 30 for Horiechireshi.
Easy-to-see Holimer for heavy wrinkled buns (Atomer LB manufactured by Mitsui Petrochemicals)
310) Six films of thermoplastic resin with a thickness of 30μ, with the lower layer (adhesive layer) and the upper layer of low-pressure polyethylene (melting point 133°C) blended with each other (melting point 120°C)
Supplied to the weakening surface of the base plate, it was passed through a heated elastic roller, a heated metal roller, and a water-cooled metal roller under the same conditions as in Example 1 to form a plywood sheet. A board for interior use on which a surface resin layer is formed is obtained. Even in this case, the surface resin layer had no blisters or cracks, and the surface was smooth and beautiful.

[Brief explanation of the drawing]

41 (a) to 41) are examples of the manufacturing process of the first invention of the present invention? 2(a) and 2(b) are schematic diagrams showing a part of an example of the manufacturing process of the second invention of the present invention, and FIG. 3 is a partially cutaway enlarged sectional view of a molded plate. 111 is a wooden board, (2I is a thermoplastic resin powder, (3) is a heat 0-ru, (
4) is a heat +1Ml1 resin film. Agent Patent Attorney Ishi 1) Chief Figure 2 (0) ■ Figure 3

Claims (1)

[Claims] A1: After preheating the wooden board, heat tf is applied to the surface of the wooden board.
A method for surface treatment of a wood board, characterized in that the Jffi resin powder is a whole resin powder, and then the wood board is passed through a hot roll and hot-pressed. +21 Elastic roll and metal zero roll as heat roll?
2. A method for surface treatment of a wooden board according to claim 1, characterized in that the wooden board is passed through an elastic roll and then through a 1g/10-g gold roll. (3) After preheating the wooden board, heat the wooden board to zero until the thermal resin film is attached to the surface of the wooden board. A method for surface treatment of a wooden board, characterized by applying heat and pressure to the surface of the wooden board. (4) Elastic O-L and gold IIl as heat 0-L! O-
934. The method for surface treatment of a wooden board according to claim 933, characterized in that the wooden board is provided with one elastic roll and one metal roll in that order.