JPS60229708A - Formation of heat-insulating synthetic board - Google Patents

Abstract

PURPOSE:To form a synthetic wooden board with lesser warping and distortion by a method in which cellulosic short fibers are temporarily pressed for molding and then bonded with a decorating material. CONSTITUTION:Wood chips, pulp, etc., are dried, impregnated with a resin liquid, dried, and then broken to obtain an aggregate 1. A base material formed by mixing the aggregate 1 and fibers 2 or the base material with a net cloth 3 is temporarily hot- or cold-pressed to cause the integral adherence of the aggregate 1 and the entanglement of the fibers 2 and the net cloth 3. A decorating material 4 (e.g., plywood, Victoria lawn, etc.) is then bonded to the surface of the molding so obtained without the aid of any adhesive means and pressed for molding to form a synthetic wooden board free of warping and distortion.

Description

[Detailed Description of the Invention] This invention relates to the provision of a synthetic wood board that eliminates the peculiarities of wood such as warping or twisting that occur due to changes in dryness and humidity, and has excellent heat insulation or sound insulation functions. It is.

However, with ordinary wood, products tend to warp and twist depending on the degree of dryness and humidity, and when obtaining a product, it is important to check the quality of the wood used, the grain of the wood, or the location where the wood is taken out. It was requested that such factors be carefully considered. However, as a recent trend, good quality wood has run out, and it has become difficult to supply wood that can be used immediately for various purposes.

The heat-insulating synthetic wood board according to the present invention has been developed and provided in particular in view of the unique characteristics of wood and the current state of wood industry in recent years. Cellulose-based material is beaten to approximately 60 mesh to form a cotton-like beaten material, which is then covered with glass fibre/fiber for reinforcement.
<- or mainly inorganic Fj such as carbon fiber
By mixing & textile materials, or by interposing these meshes or wire meshes and pressing them together,
It eliminates the tendency of expansion and contraction caused by drying and moisture, without impairing wood's natural insulation or moisture absorption properties, and guarantees uniform elongation and contraction in all directions. This is to ensure that there is no room for warpage, twisting, etc. to occur.

In addition, in the present invention, decorative materials such as veneer, plywood, or various cloth materials are added to the unique aggregate pressure 6 board without using an adhesive, and re-bonded. , the molding is done, and the decorative material and the temporary pressure bonding material are made integral with each other, and at the same time, the same molding is applied to the plate material to be formed.

In order to achieve specific effects on the various properties, the heat insulating synthetic wood board according to the present invention is constructed by beating cellulose materials such as wood chimps and valve materials to form short fiber aggregate. After preparing and temporarily crimping this aggregate, decorative materials such as veneer or plywood are attached to the temporary bonding board 9, and placed at a point where it is pressed and integrated. Considerable other embodiments accompanying these embodiments are planned.

Hereinafter, a typical embodiment of the heat-insulating synthetic wood board according to the present invention will be specifically explained. First, the wood chips or valves used are ideally made of poplar wood, coniferous wood, etc., which have relatively long fibers. However, the use of other coniferous or threshold-leaved trees, as well as rice husks and pacas, was planned without being specified.

The material is air-dried to a moisture content that is within the range of moisture content, which induces tissue collapse in the material.

It is a material that has been subjected to a crushing treatment, and is usually subjected to a crushing treatment corresponding to heating, drying, and beating of the raw material at the same time.

Especially when the material is rapidly dried to within the air-dried moisture content.1. J
! , the material structure is prone to collapse due to self-destruction! ε! ,,L
When the material is subjected to beating treatment, it is particularly easy and reliable to crush and pulverize the material. This material was designated as Material 1.

In addition, when the aggregate 1 on the slope is formed by the following f-〃, it is possible to provide molded plywood that is more effective in preventing corrosion of the interposed wire mesh 1 and 2. It is. That is, the cellulosic materials used, such as wood chips, bulbs, rice husks, and hekas, are rapidly dried to within the air-dried moisture content to forcefully disintegrate the tissue, and then a urea-based resin solution is applied to the materials. Mix and impregnate within the range of 5 to 20% and leave for 20 to 30 minutes.
The aggregate is placed in a temperature range of 00 to 250''C and subjected to heating, drying and crushing treatment to obtain aggregate 1.

In the aggregate 1 prepared by molding using the above method, the aggregate 1 itself has a hardened portion 1c of the urea-based resin liquid, which further improves the shape retention function due to mutual stone formation of lignin lb, which will be described later. In this way, the water resistance and rot resistance properties of the plate material formed with the eggplant are significantly improved. In addition, when the pressing process used in forming the plate is a pot press, hardening of the unhardened portion is induced, and this causes the lignin to harden.
Together with b, it creates a strong binding structure and provides good shape retention to the molded synthetic wood board.

Furthermore, through the adhesion and impregnation treatment of this urea resin, aggregate 1
The wood acid at the starting point is gradually neutralized, and the pH at the starting point is
On the other hand, since the PH of the molded aggregate l was positioned within the neutral range of 6 to 7, it was possible to provide a neutral synthetic wood board II). As a result, it is expected to be used in a wide range of applications, particularly as oxidation-resistant structural materials, experimental materials, and storage structural materials.

The aggregate 1 thus provided can be crimped and molded as an aggregate of clavicle/material 1, and further provided with a reinforcing layer ta8 of glass fiber, carbon fiber, etc. as described below.
2 and intervening molding of the mesh fabric or wire mesh fabric 3 are planned.

In addition, various methods are planned for mixing the fiber 2, such as stirring the aggregate 1 and mixing it into the aggregate 1, and mixing the fiber 2 by spraying the aggregate 1 and the fiber 2 onto the same mold surface. In either case, consideration has been given to ensuring that the fibers 2 to be inserted are not bent more than is safe.

Thus aggregate l and fiber! The material mixed with i2 or the material with mesh fabric 3 interposed therein is temporarily pressed using a hot press or gold press to make the aggregates 1 and 2.
It is designed to prevent entanglement with the net fabric 3.

In particular, the pressure of the press used should be 60 to 200 kg/cm
By making it into a shape, the raised 18 parts of the aggregate are completely intertwined and tightly bonded together, and at the same time, the aggregate 1
The lignin 1b extracted from the part functions as an adhesive, giving the molded product a predetermined shape-retaining function and hardness.

In particular, the presence of the raised part 1a constitutes a predetermined insulating gap between aggregates 1 and 1, and an expansion absorption gap when aggregate 1 swells, making it more effective than ordinary wood. In addition to promising a heat insulating effect, it also suppresses the expansion of the molded material as a whole when the constituent aggregate expands due to moisture absorption, and as a result, it effectively prevents the molded product from warping or twisting when it swells. It is something.

A decorative material 4 such as a decorative veneer or plywood, or cheesecloth or other cloth fabric can be applied directly to both sides or one side of the molded plate material m which has been temporarily pressed in this manner without intervening any adhesive means.
The decorative material 4 is molded and the decorative material 4 is brought into close contact with the decorative material 4 by applying pressure and molding with a pot press or gold press at a pressure of about 60 to 200 kg/cm'. be.

As a result, the molded plate material m is molded into the expected shape, and the decorative material 4 is integrally attached to the surface, and the decorative material 4 itself is backed by the molded plate material m. η! It has been molded.

The synthetic wood boards thus provided have been particularly recognized for the following advantages in terms of durability compared to common veneers or plywood. That is, (1) Aggregate 1 in molded plate material m
The brushed part 1a of the veneer or plywood is attached to the "eye" part of the decorative material 4 such as veneer or plywood, and the two are tightly attached without adhesive, and the decorative material 4 is glued together. It was considered easy and reliable.

(2) The molded plate material m used as the backing material for the composite material is once beaten to form short fibers and then re-molded before being pressed, so that it warps due to swelling of the tissue. , twisting was effectively prevented, and deformation of the plate material after molding was effectively prevented.

(3) Due to the binding of lignin lb and, in other embodiments, the binding of the hardened portion 10, the aggregates 1-1 are tightly bound to each other, causing the aggregate to lose its shape due to swelling, or the board to bulge. ejection was effectively prevented.

(4) The presence of the raised naps 1a provided the molded plate material m with the required impact resistance and bending strength.

(5) The presence of the raised portion 1a forms a unique heat insulation or sound insulation gap between the aggregates 1-1, providing good heat insulation and sound insulation properties to the plate material to be formed, and at the same time, the raised portion 1a
gave the board a soft feel.

([i) Due to the presence of the raised part 1a, when the aggregate ii swells, the equivalent part of the expansion is absorbed in the raised part 18, effectively preventing the deformation of the plate material itself to be formed. did.

(7) The fibers 2 or the mesh fabric 3 to be mixed or interposed are closely intertwined with the nap 1d of the aggregate l, and as a result, the plate material to be formed has a predetermined bending strength. properties, impact resistance properties, and uniform impact resilience were guaranteed.

In addition, it was separately planned to use the sanding powder of the particle board as the aggregate in the molding of the aggregate 1 on the slope.

Due to the characteristic structure of the heat insulating synthetic wood board according to the present invention, the molded board material itself is effectively prevented from warping, twisting, etc., and there is almost no change in shape due to drying or wetting. It can be used for a wide range of purposes, and it effectively provides bending strength and rebound resilience in smooth board materials, and has better impact resistance and bending strength properties than ordinary wood. The present invention provides a synthetic wood board having the following characteristics.

At the same time, it promises better insulation than ordinary wood, uniform insulation properties over the entire surface of the board, and uniform rebound resilience. Combined with construction characteristics such as hammering, it is an effective heat-insulating synthetic wood board.

[Brief explanation of drawings]

Fig. 1 is a broken end view of an aggregate l according to the present invention, Fig. 2 is a broken end view of another aggregate l, and Fig. 3 is an enlarged cross-sectional view of a main part of a molded plate material m that is pressed together. 4 is an enlarged cross-sectional view of the main part of a molded plate material m according to another embodiment, FIG. 5 is an enlarged cross-sectional view showing the joint portion between decorative material and aggregate, and FIG. 6 A-B is a synthetic wood board. FIG. 3 shows a perspective view of the main parts. In addition, in the figure, 1... aggregate, 2... fiber, 3... net fabric, 4... decorative material are shown. 1 Figure 2 Figure 3 Figure 4 / 10 /b

Claims (2)

[Claims] (1) Prepare C-shaped short fiber aggregate by beating cellulose materials such as wood chips and pulp, and after temporarily bonding this aggregate, veneer, plywood, etc. A method for forming a heat-insulating synthetic wood board characterized by adding a decorative material, suppressing it, and integrating it. (2) The adiabatic synthesis according to claim 1, characterized in that the aggregate is provided by impregnating a cellulose material with a urea resin liquid, impregnating E, heating drying, and beating. How to form a wooden board.