JPS5865656A - Manufacture of decorative 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] This invention relates to a method for manufacturing decorative plywood. As a conventional decorative plywood, No. 1 #AK is shown.

A natural wood veneer 3 is laminated on the top surface of a base material 1 made of vinyl chloride resin with an adhesive 2 interposed therebetween. When constructing 4 tons of decorative plywood, *in order to speed up construction, it is necessary to use extrusion molding [apply adhesive 2 on the base material 1 of the bale and laminate the wooden veneer 3, or However, if the former method is used, it is necessary to apply the adhesive 2 to the bottom surface of the plate 3 and laminate it onto the base material 1 immediately after extrusion molding. l1IW2t* If the cloth method is used, there is a problem that it is difficult to apply the adhesive 2 because the base w1 has not yet completely hardened immediately after extrusion molding.On the other hand, if the latter method is used, i.e. When applying the adhesive 2 to the bottom surface of the wood veneer 3, since the wood veneer 3 is very thin (0.3 to 0.il), the adhesive 2
Therefore, an object of the present invention is to provide a method for manufacturing decorative plywood that can easily join a resin base material and a wood veneer.

One implementation N of this invention will be explained using the second factor.

That is, this method of manufacturing decorative plywood involves impregnating a wooden veneer 5 with a resin solution containing vinyl chloride resin as a main component, drying the impregnated veneer 5t, and then laminating it on a base material 6 made of vinyl chloride resin. , this is fused by heating and pressing to form decorative plywood 7
get.

The resin solution with which the wooden veneer 5 is impregnated is, for example, one in which vinyl chloride resin is dissolved in a ratio of 20 to 30 parts to 100 parts of cyclohexanone.

At this time, there is a large relationship between the viscosity of the liquid and the polymerization &V'i of the vinyl chloride resin, but for the purpose of the present invention, a vinyl chloride resin having a degree of polymerization of 700 to 1000 is desirable. Then, a resin liquid is made by slowly dissolving vinyl chloride resin in cyclohexanone.

Further, the method of impregnating the wood veneer 5 with the resin liquid is carried out using a general vacuum impregnation device.

Furthermore, drying of the wood veneer 5 after impregnation with the resin liquid is carried out at 100° C. for about 10 to 15 minutes. j
It will rise.

Furthermore, the impregnated veneer 5 is heated and pressed onto the base material 6 made of vinyl chloride resin, for example, by laminating the impregnated veneer 5 onto the base material 6 using a hot roll at 140 to 180°C. As a result, the vinyl chloride resin of the base material 6 and the subvinyl chloride resin impregnated into the wood veneer 5 are respectively melted and thermally fused to each other, thereby joining the wood veneer 5 and the base material 6'ft. 0 At that time, an adhesive force Fi1 of usually 7 to 10 KF/- is obtained.

In this way, the KL is applied so that the wooden veneer 5 and the base material 6 are bonded by thermal fusion of the vinyl chloride resin impregnated into the wooden veneer 5.
7't, in other words, it is not necessary to apply adhesive on the wooden veneer 5 or the base material 6t as in the conventional case, so the wooden veneer 5 and the base material 6t can be easily joined. Generally, when bonding the wood veneer 5j, it is difficult for the #'i adhesive to enter the summer wood part of the wood veneer 5, and the adhesive force is therefore weak, but in this embodiment, the resin liquid is applied to the wood veneer 5 by vacuum impregnation. Because it is impregnated, the resin gets into the summer wood.

The adhesive force becomes stronger.Furthermore, even if the resin is impregnated into the wood veneer 5 as in general WPC, the wood grains of the wood veneer 5 will not be buried, and it will remain the same as a normal veneer. Furthermore, by impregnating the housing with resin, the wear resistance is approximately doubled.

In the above embodiments, vinyl chloride resin was used, but other resins may be used, as long as the resin in the resin liquid and the resin constituting the group ItS are the same.

As described above, the method for manufacturing decorative plywood of the present invention involves impregnating a wooden veneer with a resin solution, forming this impregnated veneer with the same resin as the resin in the resin solution, and placing it on a bonding material. It has the effect of easily joining resinous base materials and wooden veneers, as it fuses by heating and pressing.

[Brief explanation of the drawing]

FIG. #I1 is a sectional view of a conventional decorative plywood, and FIG. 2 is a sectional view of a second decorative plywood manufactured using an embodiment of the present invention. 5...Single board, 6...Base material, 7...Decorative plywood 7゛＼＼ Figure 2

Claims (1)

[Claims] (]) A wooden board is impregnated with a resin liquid, and this impregnated veneer is
A method for manufacturing decorative plywood, in which decorative plywood is laminated on a base material made of the same resin as the resin in the resin liquid and fused by heating and pressing. (2) The method for manufacturing decorative plywood according to claim 8M (1), wherein the resin is a vinyl chloride resin.