JPS6143502A - Manufacture of resin-treated ligneous material - Google Patents

Abstract

PURPOSE:To make the titled material into an article whose number of manufacturing processes is few, equipments are simple, cost is low and quality is favorable from a safety and sanitary points of views, by performing heat treatment by making use of powdery resin. CONSTITUTION:As for a ligneous material 1 to which powdery resin 2... are applied, mold release films 3, 3 are covered over the powdery resin 2..., to which hot-pressing treatment is applied through hot presses 4, 4. Then when the mold release films 3, 3 are peeled off a resin-treated ligneous material 5 is obtained. As for the resin-treated ligneous material 5, along with a matter that the interior of the same is cured with the resin and reinforced a conduit part 1a on the surface is filled also with the resin and resin films 6, 6 are formed on the surface. With this construction, as impregnation and the curing can be performed at the same time through hot-pressing treatment, simplification of manufacturing work can be contrived and manufacturing equipments can be done with simple ones. As the powdery resin is used for the titled material, the excessive powdery resin can be recovered effectively, the titled manufacture becomes costwise advantageous, which is pollution-free and favorable from view points of safety and sanitation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This issue #J relates to a method for manufacturing resin-treated wood materials, and it is possible to simplify the manufacturing process, rather than heat-pressure treating wood materials with powdered resin. This is intended to reduce manufacturing costs.

[Conventional technology]

Conventional methods for producing resin-treated wood materials include the following. Wooden materials such as veneers and decorative veneers are first degassed under reduced pressure, and then immersed in a liquid reactive resin or reactive seven-layer (resin liquid) under normal pressure or tfina pressure,
The resin liquid is impregnated into the wood material.Next, this is pre-dried and then hot-pressed to harden the 1aBVi liquid to obtain the desired pre-shoulder treated wood material.

[Problem that the invention seeks to solve]

However, such a manufacturing method has the following problems, and solutions to these problems are desired.

■ There are many manufacturing processes, and 'Ii! The drill requires large-scale equipment.

(2) Since a constant amount of ml of liquid is poured into the impregnation tank and the wood material is immersed in it, a larger amount of resin liquid is required than the resin device that actually impregnates the wood material, which is wasteful.

(2) In order to facilitate impregnation, it is diluted with an organic solvent to make it low in viscosity, which requires the use of an organic solvent that is not originally needed, resulting in increased cost and safety issues.

[Means for solving problems]

Therefore, in the present invention, the above-mentioned problem is solved by using powder resin and performing heat-pressure treatment.

Hereinafter, the steps will be explained in detail with reference to the drawings. FIGS. 1 to 3 show an example of the manufacturing method of the present invention in the order of steps, and the material is a thin plate-like wood material represented by a veneer, a decorative veneer, etc. in the figures. The thickness of this wood material 1 is not determined, but it is preferably thin from the viewpoint of the degree of penetration of the resin.

A powder resin 2... is applied to the surface f of this wood material 1 as shown in the first FgJ. The powder mtN2 used here is a powder of thermosetting resin such as epoxy resin, unsaturated polyester resin, and acrylic resin with a diameter of 200-
! ROμ powder is used, preferably a mixed epoxy resin of novolac type epoxy resin and bisphenol Afi epoxy resin, with imidazoles such as 2-ethyl-4-methyl-imidazole added as a hardening agent.
A 7'E fast-curing material is used. Powder tree Hd2・
As for the coating method on the wood material l, powder electrostatic coating method, drop spraying method, etc. can be applied. It is determined as appropriate depending on the application of the powder resin 2, the porosity 1 thickness of the wood material 1, and the desired finish state, but it is usually 100 to 3009/ra2.
It can be determined within the range of

At the next stage, as shown in Fig. 2, a release film 3.3 is applied over the powder resin 2 to the wood material 1 coated with the powder resin 2. . These are then subjected to heat and pressure treatment using a hot press 4.4 or the like. The #l type film 3 has good heat resistance (non-adhesive thickness of 15 to 50 μm).
A fluororesin film of m is suitable. The heat and pressure treatment conditions are determined as appropriate depending on the workload, such as the 20 types of powder resin and the type of wood material. It is said to take about 5 to 10 minutes. Note that the pressure at this time is preferably within a range of pressure values normally used for laminated manufacturing of plywood and the like. The powder resin 2... is melted by the heat and pressure treatment,
8 Pressure is applied to penetrate into the wood material 1 and harden.
It also remains on the surface of the wood material and hardens.

Then, as shown in FIG. 3, by peeling off the mold release film 3.3, the desired resin-treated wood material 5 is obtained.

The interior of this resin-treated wood material 5 is hardened and reinforced with resin, and the conduit ridges 1a on the surface are also filled with resin, and resin films 6, 6 are formed on the surface. In addition, 1m! If a matte film is used as the mold film 3,
The resin film 6 has a matte finish, and if a crimped film is used, it has a ridged finish.

[Effect]

In the 72@ method, resin impregnation and curing can be performed simultaneously by heat-pressure treatment, so the number of steps is small (
This simplifies the work and requires only a small amount of equipment. In addition, since the powder resin 2... is applied to the wood material l,
Excess powder resin 2... can be effectively recovered and powdered tif-
Resin 2... is not wasted. In addition, powder resin 2...
・Since it is non-solvent, it is advantageous in terms of cost, and it is also suitable for safety and health as it is undocumented. Furthermore, since the resin film 6 is formed on the surface of the resulting resin-treated wood material 50, it can be used as a product as it is, and no top coat is required.

[Other specific examples]

Alternatively, as shown in Fig. 3, a transparent nonwoven fabric 7.7 may be placed on the powder tree N2, and then heat and pressure treatment may be performed in the same manner. According to this method, the nonwoven fabrics 7 7 and the wood material 1 are impregnated with attenuated fat and cured, and the nonwoven fabrics 7, 7 and the wood material 1 are cured.
are integrated, and the mechanical strength of the resulting resin-treated wood material 5 is improved. If the refractive index of the powder resin 2 and the fibers of the nonwoven fabrics 7, 7 are similar, the nonwoven fabrics 7°7 in the resin films 6, 6 will no longer be visible, and the transparency of the wN films 6, 6 will be maintained. be done. The nonwoven fabric 6 is preferably thin, and is preferably made of acrylic fiber or the like with a thickness of about 110-30 mm2.

Furthermore, as shown in FIG. 5, powder resin 2 is applied to the nonwoven fabrics 7, 7 in advance by means such as thermal spraying or fusion, and this is placed on the wood material 1 and heated. It may be pressure treated. According to this method, the powder resin-coated nonwoven fabric can be prepared separately in advance, making it easier to handle the material and improving work efficiency. The same effect can be obtained by applying the powder resin 2... to the film 3.In addition, in this method, when applying the powder skin oil 2... to the non-t1 cloth 7, It is necessary to set the coating conditions so that the heat-melting property remains even after the coating is applied.

[Example 1] As a wood material, an American walnut veneer 2 with a thickness of A2 was prepared, and the front and back surfaces of this veneer were coated with 60 parts by weight of novolac type epoxy resin, 40 parts by weight of bisphenol epoxy resin, and 2 parts by weight of a hardening agent. Ethyl-4-methyl-imidazo-/I/31! Powdered epoxy ja consisting of imaginary part
m (particle size 100 mesh pass) per tsubo/! ;
It was sprayed at Og/rm2.

Next, the resin was melted by placing it in a far-infrared oven at a temperature of 1,000 degrees Fahrenheit for 20 seconds, and then fused onto the veneer. Next, a 25 μm thick polyvinyl heptachloride film was placed as a film for the end mold, and heat-pressure treated at 130°C for 10 minutes in a hot press. fi
A resin film is also formed on the surface, giving it a beautiful finish of American walnut (fat).

[Example 2] In Example 1, after spraying powdered epoxy resin on the American walnut veneer, the
/m" acrylic fiber nonwoven fabric was placed, and then a W-type film was placed and heat-pressure treated in the same manner.The resulting resin-treated veneer had a flexural modulus three times that of Example 1. , and the trap nonwoven fabric inside the resin film on the surface could not be visually recognized.

〔Effect of the invention〕

As explained above, since the method for producing resin-treated wood materials of the present invention involves heat-pressure treating the wood material with powdered resin, impregnation and hardening of ususo resin can be performed at the same time by heat-pressure treatment.
This simplifies the manufacturing work and requires simple manufacturing equipment. Since powdered resin is used, excess powdered resin can be effectively recovered, and it is a non-solvent system, which is advantageous in terms of cost, and is non-polluting, which is favorable in terms of health and safety. In addition, since a sebum film is formed on the obtained oil-treated wood material in place of a top coat, it can be used as a product as a cosmetic material.

[Brief explanation of drawings]

FIGS. 1 to 3 are explanatory diagrams showing an example of the manufacturing method of the present invention in the order of steps, and FIGS. μ and 5 are explanatory diagrams showing other examples of the present invention. 1... Wood material, 2... Powder resin, 5... Wooden material.

Claims (1)

[Claims] A method for producing resin-treated wood materials, which is characterized by subjecting wood materials to heat-pressure treatment with powdered resin.