JPH0330903A - Inorganically treated ply wood - Google Patents

Abstract

PURPOSE:To remove the anisotropy from the ply wood concerned under the condition that its flame retardancy, corrosion resistance and mothproofness are held as they are and realize its thickness enough large so as for nail to effectively work on the ply wood by a method wherein inorganically treated veneers are laminated to inorganically treated lumber core. CONSTITUTION:Wood 1 is immersed in hot water for water saturation treatment and, after that, in water solution 4 of inorganic cation such as Al<2+>, Mg<2+>, Zn<2+>, Ca<2+> or Ba<2+> and then in water solution 5 of inorganic anion such as HPO, CO, SO or BO. Next, in order to remove un-treated inorganic ions from the wood 1, the wood is immersed in water and dried so as to obtain inorganically treated wood 2. By compressing the obtained inorganic treated wood 2 widthwise through adhesive, inorganically treated laminated wood 3 is produced. After that, by pressing inorganically treated veneers 4, which are inorganically treated similarly, from the direction of the thickness of the inorganically treated laminated wood 3 through adhesive, inorganically treated ply wood 5 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to various inorganic treated plywoods that are used as panel building materials and require fire retardant properties.

[Prior Art] In order to impart corrosion resistance, flame retardancy, and insect repellency to wood plywood, an inorganic treatment has been proposed in which an insoluble inorganic salt is generated inside the wood. In addition, orthogonal plywood, chipboard, lumber core plywood, etc. have been conventionally used to eliminate anisotropy such as warping of wood.

[Problem to be solved by the invention]

However, when inorganic treatment is applied to plywood that has lost its anisotropy, it can only be applied to relatively thin orthogonal plywood, and in order to obtain thick plywood, treated veneers must be overlapped. It was very time consuming. In addition, a large amount of inorganic treatment solution is required, post-processing such as cutting is required, resulting in poor yield, and the finished plywood has problems in that it is difficult to nail nails at the edges.

An object of the present invention is to provide an inorganically treated plywood that has flame retardancy, corrosion resistance, and insect repellency, has no anisotropy, is thick, and has good nail resistance.

[Means to solve the problem]

The inorganic treated plywood of the present invention is characterized in that an inorganic treated veneer is bonded to an inorganic treated lumber core.

FIG. 1 is a process explanatory diagram showing the process of manufacturing plywood according to the present invention. The wood 1 is immersed in hot water and subjected to water saturation treatment, and then inorganic cations (e.g. At”, Mg N *, Z
n I + , Ca R *, Ba * +
) in an aqueous solution, then inorganic anions (e.g. H
Then, in order to remove unreacted inorganic ions from wood 1, it is immersed in water and dried to perform an inorganic treatment. A treated wood 2 is obtained.The thus obtained inorganic treated wood 2 is pressed in the width direction with an adhesive to create an inorganic treated laminated timber 3.At this time, the back and front sides of the wood are made uniform. It is preferable to do this alternately.

Then, an inorganic treated veneer 4 that has been similarly inorganically treated is pressed together with an adhesive from the thickness direction of the inorganic treated laminated wood 3 to obtain an inorganic treated plywood 5. In the inorganic treatment by immersion in the aqueous inorganic cation solution and inorganic anion aqueous solution, the wood l may be subjected to an insizing process to increase permeability.

FIG. 2 is a process explanatory diagram showing another example of the plywood manufacturing process. A piece of wood 1 is compressed using an adhesive to create a laminated wood 6, and this laminated wood 6 is immersed in hot water for saturation treatment, then immersed in an aqueous inorganic cation solution, and then immersed in an aqueous inorganic anion solution. Soak in.

Furthermore, in order to remove unreacted inorganic ions from the laminated wood 6, the laminated wood 6 is immersed in water and dried to undergo inorganic treatment, thereby obtaining an inorganic treated laminated wood 3. Next, the inorganic treated veneer 4, which has been similarly inorganic treated, is pressed together from the thickness direction of the inorganic treated laminated wood 3 via an adhesive to obtain the inorganic treated plywood 5. Said inorganic cation water? In inorganic treatment by immersion in 8 liquid and inorganic anion aqueous solution,
In order to increase permeability, the wood 1 may be subjected to insizing processing.

The inorganically treated plywood according to claim (2) is an inorganically treated plywood in which an inorganically treated veneer is bonded to a core material which is obtained by slicing laminated laminated wood along the end face and inorganically treated.

As shown in Fig. 3, lamina 7 (laminated wood, small square lumber) is compressed with adhesive, and the end surface of lamina laminated timber 8 is cut into slices in the thickness direction, and used as laminated timber 6 after inorganic treatment. By doing so, it is possible to obtain an inorganically treated laminated material 3 that has greatly increased permeability to an inorganic ion aqueous solution. FIG. 4 shows an explanatory diagram of the manufacturing process using the laminated laminated wood 8. The laminated laminated timber 8 is sliced to a predetermined thickness (section A in the figure) to obtain the laminated timber 6 with the end surface in the thickness direction.

This laminated wood 6 is immersed in warm water and subjected to water saturation treatment, then immersed in an aqueous inorganic cation solution, and then immersed in an aqueous inorganic anion solution. Furthermore, in order to remove unreacted inorganic ions from the laminated wood 6, the laminated wood 6 is immersed in water and dried to undergo inorganic treatment, thereby obtaining an inorganic treated laminated wood 3. Next, the inorganic treated veneer 4, which has been similarly inorganic treated, is pressed together from the thickness direction of the inorganic treated laminated wood 3 via an adhesive to obtain the inorganic treated plywood 5.

[Effect]

According to the structure of the present invention, a wood-based material is impregnated with an inorganic cation aqueous solution and an inorganic anion aqueous solution, and by combining the impregnated wood-based materials, an inorganic treated plywood is produced that is free from anisotropy such as thick warpage. can be easily manufactured.

〔Example〕

Japanese pine wood (15 mm square x 1) as shown in Figure 1 (a)
80 (1w + length) was heated in hot water at 80°C for 24 hours, and then heated at 80°C in an aqueous inorganic cation solution in which 42kg of barium chloride and 1kg of boron chloride were dissolved in 100kg of water.
It was treated for 24 hours. Next, ammonium phosphate 106
kg, and an inorganic anion aqueous solution prepared by dissolving 37 kg of boric acid in 100 kg of water at 80°C for 24 hours. Furthermore, in order to remove soluble inorganic ions, it was treated with water for 24 hours, dried, and inorganically treated (FIG. 1 (g))), and the impregnation rate of inorganic salt was 30 to 40%. The inorganically treated wood is treated with a water-based vinyl urethane adhesive at a pressure of 3 to 5 kg/c4 in the width direction at 150 to 170 g/rrf.
It was coated, pressed for 3 hours to form a laminated material, and then cut in the thickness direction to obtain a laminated material with a thickness of 12III11 (Fig. 1 (C)).
.

Similarly, an agathis veneer (thickness: 2) was inorganically treated to obtain an inorganically treated veneer with an inorganic salt impregnation rate of 30 to 50%.

Next, apply 180 to 200 g/po of urea-melamine adhesive to both sides of the laminated wood in the thickness direction, and apply 10 kg/poly at a temperature of 110°C to 120''C between the inorganic treated veneers.
A pressure of c+i was applied for 3 minutes to obtain inorganic treated plywood (FIG. 1(d)).

As a result, in this method for manufacturing inorganically treated plywood, the amount of treated water (18 ti) can be reduced to 2/3 compared to the inorganic treatment of orthogonal plywood.

[Effect of the invention] The method for producing inorganic treated plywood of the present invention involves impregnating it with a stepless ion aqueous solution to form an inorganic salt inside the wood, combining this wood into a lumber core structure, and bonding an inorganic treated veneer to produce inorganic treated plywood. By using this method, untreated plywood that is not only corrosion resistant, flame retardant, and insect repellent, but also thick and free of anisotropy such as warping can be produced with a small amount of treated water solution, and even the edges can be easily nailed. Easy to get angry.

The inorganic treated plywood of claim (2) has similar corrosion resistance by laminating an inorganic treated veneer to a core material which is inorganically treated by slicing laminated laminated wood along the end face. In addition to being flame retardant and insect repellent, non-treated plywood that is thick and free of anisotropy such as warping can be produced with a small amount of treated water solution, and it is easy to nail even at the edges (
, it can also be manufactured using small square lumber, making it possible to use wood resources effectively.

[Brief explanation of drawings]

FIG. 1 is a process explanatory diagram showing a manufacturing method according to an embodiment of the present invention, FIG. 2 is a process explanatory diagram showing a manufacturing method according to another example, and FIG.
The figure is a perspective view of laminated laminated wood, and FIG. 4 is a process explanatory diagram showing a manufacturing method using laminated laminated wood. 1... Wood, 2... Inorganic treated wood 1.3... Inorganic treated laminated wood, 5... Inorganic treated plywood, 7... Lamina,
8... Laminated laminated wood, Figure 1 Figure 2 ↓ (C)

Claims (2)

[Claims] (1) Inorganic treated plywood made by laminating an inorganic treated lumber core to an inorganic treated veneer. (2) Inorganic treated plywood, which is made by laminating an inorganic treated veneer to a core material that is made by slicing laminated laminated wood along the end surface and then inorganically treated.