JPS5814740A - Manufacture of surface resin processed woody plywood - 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 surface resin processing of wood plywood used for building materials, furniture, etc., or wood plywood used as materials for architecture or construction.

In other words, a strong synthetic resin film is formed on the surface of plywood, giving it a beautiful appearance and gloss, as well as water resistance and
It improves stain resistance, etc., and when used as a concrete panel in civil engineering, construction work, etc., it smooths the concrete surface and prevents concrete from adhering to the panel surface and plywood material remaining on the concrete surface. This is a method for treating the surface of wood plywood with resin, which improves the releasability of concrete panels and significantly extends the repeated use life of concrete panels.

Conventionally, the surface of veneer plywood has been treated with decorative paper, veneer lamination, etc. during plywood manufacturing, but these have not been improved as described above in terms of strength, water resistance, chemical resistance, and peelability. It was an unrelated process.

Therefore, for the purpose mentioned above, coating of resin paint, thermal spraying, or pasting of resin film is mainly carried out after processing the plywood, but in both cases, not only is the process complicated, but also the strength of the product is affected. Adhesion was also incomplete.

Furthermore, heating and pressure lamination of a resin film on the plywood surface has been carried out, but the processing after the plywood is formed is not a simple process that is difficult to handle due to its weight, but rather depends on the thickness of the plywood and the heat used for lamination. Due to the effect of the curable resin adhesive, the plywood surface has high hardness and low elasticity and flexibility, so the adhesion of synthetic resin films or sheets laminated to annual rings and other irregularities may be affected by heating or pressure. It also has the disadvantage that it tends to be incomplete and tends to peel off partially.

This invention eliminates the above-mentioned drawbacks of conventional products and provides a method for manufacturing wood plywood with surface resin treatment that has perfect adhesion, strength, water resistance, concrete removability, and the number of times of repeated use. It was created for the purpose of development and has been completed.

The present invention will be specifically described below with reference to practical examples.

As shown in the drawing, a thermoplastic synthetic resin film (21), for example a film of polyethylene or its copolymer, is spread on the surface of a veneer veneer (1), and a release agent powder or emulsion (22) is uniformly applied. The synthetic resin film (2) is tightly laminated on the veneer (1) by spraying and applying heat and pressure in a press (5).
Figure 1 a), or a highly adhesive polyolefin modified polymer film (21+) and a polyolefin film (21+) are laminated on a veneer veneer and heated and pressurized via a release paper cloth (3) (Figure 1 b). ), or in the case of a veneer veneer, highly adhesive polyolefin modified polymer film C73), polyolefin film 1) and release agent powder or emulsion are spread or sprayed in a layered manner, and the resin is coated by applying pressure and heating. Manufactures veneer veneers.

(Fig. 1C) At this time, since the resin film is spread and pressure bonded to the unprocessed veneer veneer, the veneer veneer itself has elasticity and flexibility, and there is no seepage of thermosetting resin, so the synthetic resin film It spreads easily and uniform close adhesion can be easily achieved.

In the next step, a plywood laminated plywood is manufactured using the resin-treated veneer veneer as the surface and applying pressure and heating using a melamine-based, diaryl phthalate-based adhesive, etc. based on a normal plywood manufacturing method.

At this time, the synthetic resin film layer on the surface is naturally reheated and pressurized, which further improves adhesion and surface smoothness, even when the first veneer bonding Even if there are incomplete adhesion points, complete and uniform adhesion can be achieved during plywood lamination.

The method for manufacturing wood plywood with surface resin treatment according to the present invention will be described below with reference to Examples.

Example 1 Tonen Petrochemical Co., Ltd. rcMPJ film 0.1a was applied as a highly adhesive polyolefin-modified polymer to the surface of a veneer veneer.
Powder of a release agent (Daikin Industries, Ltd., Lubron Shi-5) was spread on top of the layer to evenly cover the entire surface, and then it was heated to 160°C under pressure of about 30°C using a heating press machine.
Heat and pressurize for seconds, release from the mold, and let cool. A veneer veneer plate with extremely uniform and strong surface resin treatment was obtained. Next, using this veneer as a surface layer, plywood was manufactured using a melamine adhesive in a conventional manner. (120'C, 50 minutes) The product was a surface resin-treated wood plywood with an extremely well-adhered surface film, a smooth surface, and significantly improved concrete releasability.

Example 2 A low-pressure polyethylene film with a thickness of 0.1 mm was laminated on the highly adhesive polyolefin-modified polymer film of Example 1, and a silicone release paper (commercial product DN-
TP-APZ-5 < DE-3), + 3 Of) was spread and heated to 170°C and pressure 10 for 40 minutes using a heating press.
A resin-treated veneer veneer was produced in seconds, and a veneer plywood was produced in the same manner as in Example 1 using this as the surface layer.

We obtained plywood with a strong film, and when it was used on concrete panels, the results showed a significant improvement over painted plywood, with approximately twice the number of repeated uses.

Example 3 The substrate, high-density polyolefin modified polymer film, and low-pressure polyethylene film were the same as in Example 2, and a silicone release agent emulsion (Shin-Etsu Chemical Exhibition K) was applied to the surface.
M742) was uniformly dispersed, and the surface of the veneer veneer was processed using a heated calendar roll at a passing rate of 1 momme at 140° C., and a veneer plywood was produced in a conventional manner using a diaryl phthalate adhesive.

The product plywood had a smooth and strong coating as in Example 2, and when used as a concrete panel, there were no areas where the adhesion was insufficient. A significant improvement was observed.

As described above, in the surface resin-treated wood plywood production method according to the present invention, the resin treatment is applied to the veneer veneer under conditions with extremely good adhesion, so that not only is the adhesion uniform and complete, but also the plywood The working time is significantly reduced compared to post-processing,
The weight handled during resin processing is only a fraction of the weight, which is extremely reasonable, and furthermore, when producing plywood, the surface is heated and pressurized again to ensure complete adhesion.

Therefore, it is smooth, has excellent appearance and gloss, has good ice cutting, chemical and stain resistance, and has improved electrical insulation properties, and is used as building materials, furniture, etc., and is especially used as concrete panels for civil engineering and construction. At the time, concrete peelability was significantly improved, and the number of repeated uses, that is, the panel life, was 15 to several times longer than conventional products.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of the laminated state in the first step of the embodiment of the present invention, (a) shows a state in which a resin film and a release agent are laminated on a veneer, and (b) shows a highly adhesive polyethylene A modified polymer film and a polyethylene film are laminated using a release paper, and Figure fc1 shows a state in which a release agent is further sprayed, heated, and pressurized on the upper layer of the lamination shown in (1)). Figure 2 shows a cross-sectional view of the product plywood. In the figure (1) veneer veneer, (2)...synthetic resin film, (2
1+ Synthetic resin film, (2 audience... release agent, (2
3)... Highly adhesive polyolefin modified polymer film, (3)... Release paper cloth, (4)... Adhesive layer for plywood. Patent application agent Ogawa -omi (9) -215

Claims (1)

[Claims] +11 A uniform thermoplastic synthetic resin film is formed on one surface of the veneer veneer, which is to be the surface layer, by heating and pressurizing in advance, and this film is used as the surface to apply a normal adhesive. A method for producing surface-resin-treated wood plywood, which is characterized by heating and pressurizing it to produce veneer plywood. (2) Patent for forming a thermoplastic synthetic resin film by spreading a polyolefin synthetic resin or polyolefin copolymer resin film or sheet on a veneer veneer, spraying or applying a release agent, and applying pressure and heating. A method for producing surface resin-treated wood plywood according to claim 1. (3) In forming the thermoplastic synthetic resin film, a highly adhesive polyolefin-modified polymer film and a polyolefin film or sheet of the same quality as the base polyolefin of the polyolefin-modified polymer are laminated and spread on the surface of the veneer veneer. Claims 1 and 2 that apply pressure and heat
The surface resin-treated wood plywood production method described in Section 1. (4) The surface resin-treated wood plywood production method according to claim 1, wherein the thermoplastic synthetic resin coating is formed on the veneer veneer by direct pressure or roll heating and pressure. (5) A method for producing surface resin-treated wood plywood according to claim 1, in which a release paper cloth is used on the surface during resin processing of veneer veneer and/or plywood production.