JPH0366432B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flooring material, more specifically, a surface layer is laminated on the surface of a wooden substrate through an elastic layer made of synthetic resin foam and has elasticity, thereby imparting elasticity to the surface. Regarding the flooring material provided.

Conventionally, when a wooden veneer is used as a decorative layer, when the surface layer is bent due to the elasticity of the elastic layer, the decorative layer may crack due to the difference in bending strength between the top coat layer and the decorative layer. Furthermore, since the elastic layer is made of synthetic resin foam, it is porous and when trying to adhere it to a decorative layer, the adhesive area is small and the adhesive strength is low, making it vulnerable to concentrated loads and peeling forces. occurs.

The present invention has been made to solve the above-mentioned problems, and its purpose is to prevent the decorative layer from cracking or cracking due to load even though a wooden veneer is used for the decorative layer. The object of the present invention is to provide a flooring material that has high adhesive strength between a surface layer and an elastic layer and is resistant to concentrated loads and peeling forces.

Embodiments of the present invention will be described below based on the drawings. The flooring material according to the present invention is a flooring material in which a surface layer 3 is laminated on the surface of a wooden substrate 1 through an elastic layer 2 having elasticity formed of a synthetic resin foam. It is formed by laminating a synthetic resin top coat layer 5 on the surface of a decorative layer 4 made of wood veneer, and an undercoat layer 7 made of the same material as the top coat layer 5 is laminated between the elastic layer 2 and the surface layer 3. It is characterized by this. In the embodiment, both the top coat layer 5 of the elastic layer 2 are formed of vinyl chloride sol. As shown in FIG. 1, an elastic layer 2 made of vinyl chloride foam is laminated over the entire surface of a wooden substrate 1 such as plywood. A decorative layer 4 is laminated on the surface of this elastic layer 2. A wooden veneer is used for the decorative layer 4, and a primer is applied to both surfaces of the wooden veneer. As the primer, a primer having good adhesion to vinyl chloride, such as an acrylic, vinyl chloride, or urethane primer, is used. A top coat layer 5 of vinyl chloride is applied to the entire surface of the decorative layer 4. As the elastic layer 2 and the top coat layer 5, for example, a vinyl chloride sol blended as follows is used. That is, for the elastic layer 2, 100 parts of vinyl chloride (Zeon 121), 50 parts of DOP, 50 parts of butyl epoxy sthialate, 15 parts of azodicarbonamide, 2 parts of lead-based stabilizer, 2 parts of pigment, and 2 to 5 parts of pigment were used. For layer 5, 100 parts of vinyl chloride (Zeon 121), 30 to 40 parts of DAP monomer (manufactured by Osaka Soda Co., Ltd.), 10 to 15 parts of DOP, 2 parts of tin stabilizer, and 0.6 to 0.8 parts of reaction initiator are used. Both of these are given as sols. The reason why the elastic layer 2 contains pigment is to prevent the elastic layer 2 from being transparent when the makeup layer 4 is thin, and if the makeup layer 4 is completely opaque, the pigment is not necessary. . Further, the foaming rate of the elastic layer 2 is set to about 10 times, so that the elastic force and heat insulation properties are good. Figure 2 shows the manufacturing process of this flooring material, in which (a) a sealer is applied as a sealant to the surface of a wooden substrate such as plywood, and then (b)
After applying the vinyl chloride sol blended for the elastic layer 2 described above, (c) the vinyl chloride sol is semi-gelled by heating at 120° C. for 3 to 5 minutes. However, at this time, the foaming agent is semi-gelled to prevent it from decomposing.
Next, (d) a decorative layer 4 such as a wooden substrate coated with a primer on both sides is laminated, and (e) vinyl chloride sol blended for the above-mentioned top coat layer 5 is applied over the entire surface of the decorative layer 4. . Finally, (f) heating is performed in the curing furnace 6 where the clearance is kept constant, the vinyl chloride sol of the elastic layer 2 and top coat layer 5 is gelled, and at the same time the foaming agent is decomposed and the elastic layer 2 is foamed. A flooring material like the one shown in Figure 1 can be obtained. In this way, the elastic layer 2 and the top coat layer 5 can be cured at the same time, and the elastic layer 2 and the top coat layer can be simultaneously bonded onto the substrate 1 without pressing or using an adhesive. It is.

Here, in the present invention, as particularly shown in FIG. 1, an undercoat layer 7 is interposed between the elastic layer 2 and the decorative layer 4. The undercoat layer 7 is formed using vinyl chloride sol having the same composition as the top coat layer 5. Here, elastic layer 2
The foaming rate is increased to 2 to 3 times and the thickness is 0.5 to 1.5 mm.
It is formed to a degree. In addition, both the top coat layer 5 and the undercoat layer 7 are 0.1 to
The decorative layer 4 is formed to have a thickness of 0.3 to 0.8 mm. In this way, since the decorative layer 4 is sandwiched between the top coat layer 5 and the undercoat layer 7, both of which are made of vinyl chloride, even if the surface layer 3 is bent due to a concentrated load, the decorative layer 4 is The deflection is regulated by the top coat layer 5 and the undercoat layer 7, so that cracks do not occur in the decorative layer 4. Furthermore, since the synthetic resin undercoat layer 7 is interposed between the decorative layer 4 and the elastic layer 2, the adhesion between the elastic layer 2 and the surface layer 3 is strong, and it is resistant to concentrated loads and peeling forces. It becomes stronger.

As described above, the surface layer of the present invention is formed by laminating a synthetic resin top coat layer on the surface of a decorative layer made of a wooden veneer, and an undercoat layer made of the same material as the top coat layer between the elastic layer and the surface layer. Because the decorative layer is made of wood veneer and is sandwiched between the top coat layer and undercoat layer, both of which are made of the same material, even if the surface layer is bent due to concentrated loads, the wood veneer remains intact. This has the advantage that the decorative layer using the board will not suffer from cracks or cracks. Moreover, since the decorative layer is sandwiched between the synthetic resin top coat layer and undercoat layer, water will not seep into the decorative layer, making it suitable for use on floors in areas with water, such as kitchens. It can also maintain good water resistance. In addition, if both the elastic layer and the top coat layer are made of vinyl chloride, both layers can be formed by curing the vinyl chloride sol, and both can be formed simultaneously under the same conditions, making it easier to manufacture. This method has the advantage of saving space by not distributing necessary equipment, eliminating the need for adhesives, and being able to obtain flooring without using a pressing process, thereby reducing the number of processes.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, and FIG. 2 is a schematic process diagram showing the manufacturing process of the same. 1 is a wooden base material, 2 is an elastic layer, 3 is a surface layer, 4 is a decorative layer, 5 is a top coat layer, and 7 is an undercoat layer.

Claims (1)

[Scope of Claims] 1. A flooring material in which a surface layer is laminated on the surface of a wooden substrate via an elastic layer having elasticity formed of a synthetic resin foam, the surface layer being made of a wooden veneer. A flooring material characterized in that it is formed by laminating a synthetic resin top coat layer on the surface of the decorative layer, and an undercoat layer made of the same material as the top coat layer is laminated between the elastic layer and the surface layer. 2. The flooring material according to claim 1, wherein the elastic layer and the top coat layer are originally formed from vinyl chloride sol.