JP2717917B2 - Wooden soundproof flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive wooden soundproof flooring material having excellent soundproofing performance.

[0002]

2. Description of the Related Art In recent years, wood-based soundproof flooring has often been used for floors of middle- and high-rise houses. However, wood-based soundproof flooring has the disadvantage of being extremely expensive.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned disadvantages and to provide an inexpensive wood-based sound-insulating flooring material having excellent soundproofing properties.

[0004]

SUMMARY OF THE INVENTION The present invention provides a wooden soundproof flooring material in which a two-layer resin-impregnated nonwoven fabric is adhered to the back surface of a wooden board, as compared with an upper resin-impregnated nonwoven fabric in contact with the wooden board. The present invention relates to a wood-based sound-insulating floor material characterized in that the lower resin-impregnated nonwoven fabric is softer and less sparse, and a waterproof layer is formed on the back surface of the lower resin-impregnated nonwoven fabric.

Hereinafter, the wooden soundproof flooring material of the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is a wooden board,
Plywood, particle board, hard board, LVL (parallel plywood) and the like are used. The decorative layer 2 may be formed by sticking a precious wood veneer or a decorative synthetic resin sheet on the surface of the wooden board 1 or applying a coating.

[0006] A resin-impregnated nonwoven fabric 3 having a two-layer structure and having a thickness of 3 to 6 mm is adhered to the back surface of the wooden board 1. The resin-impregnated non-woven fabric 3 having a two-layer structure has a lower layer of the resin-impregnated non-woven fabric 5 in which the lower layer is slightly thicker than the upper layer of the resin-impregnated non-woven cloth 4 in contact with the wooden board, and is made of a synthetic resin such as polyurethane resin or urea resin. Joined by resin or rubber latex. This is because the upper resin-impregnated nonwoven fabric 4 in contact with the wooden board is made more dense than the lower resin-impregnated nonwoven fabric 5 to prevent penetration of the adhesive used when bonding to the wood board. This is because when the adhesive permeates and cures, the buffering property of the resin-impregnated nonwoven fabric 4 is reduced, and the soundproofing effect is reduced. The lower layer of the resin-impregnated nonwoven fabric 5 is softer and less sparse, thereby improving the soundproofing due to the buffering effect. However, even if it is too soft, the sinking of the flooring material increases, and the walking feeling when walking on it is increased. Gets worse.

As the non-woven fabric 3 to be adhered to the back surface of the wooden board 1, one or two or more of polyester fiber, polypropylene fiber, nylon fiber or the like is made into a sheet and impregnated with a resin, or a needle punch method. In this case, a resin-impregnated sheet formed by entangling fibers may be used. As a method for impregnating the resin, a spray impregnation method using a spray, an impregnation method using a coating roll, and the like are generally considered, but are not limited thereto.

A waterproof layer 6 is formed on the back surface of the nonwoven fabric 3. The waterproof layer 6 is obtained by heat-sealing a synthetic resin sheet to the back surface of the lower resin-impregnated nonwoven fabric. In this way, the wood-based sound-insulating floor material of the present invention is directly adhered to the concrete floor surface directly with an adhesive. At times, the adhesive is prevented from penetrating from the back surface of the lower resin-impregnated nonwoven fabric.
The waterproof layer 6 is preferably an olefin resin sheet such as a polyethylene resin or a polypropylene resin, but is not limited thereto.

When the wooden board 1 is formed of a 5-ply rectangular plywood, the plywood is so arranged as to reach from the back surface of the plywood in the direction perpendicular to the longitudinal direction of the plywood and to the second layer veneer from the front side of the plywood. Form a groove. By forming the grooves in this way, the soundproofing performance of the wooden soundproof flooring can be improved. The reason why the grooves are formed so as to reach the second layer veneer from the surface side of the plywood is that it is preferable to form the grooves as deep as possible.However, if the grooves are too deep, the bending strength of the wood-based soundproof flooring material is extremely high. The wooden soundproof flooring material may fall apart during operation and construction, so it should be kept from the plywood surface to the second layer. Remaining up to the second layer can be considered in two cases, that is, the case where the groove is cut to reach the second layer and the case where the groove is cut halfway to the second layer.

As shown in FIGS. 2 and 3, the wooden board 1 is cut to produce an elongated rectangular plate 7 which is slightly displaced in the longitudinal direction so that the planar shape becomes step-like. The male and female knurls 8 and 9 are joined together at the joints so that the male and female knurls 8 and 9 can be slightly bent at the joints and loosely connected to the irregularities on the base, and the groove on the back of the joint After hardening, a hot-melt resin 10 having some flexibility after being cured may be injected and bonded, and a two-layer resin-impregnated nonwoven fabric may be adhered to the entire back surface.

[0011]

EXAMPLE 1 A polyethylene film was heat-welded to the back surface of a two-layer resin-impregnated nonwoven fabric made of nylon fiber and having a lower resin-impregnated nonwoven fabric softer and less sparse than the upper resin-impregnated nonwoven fabric. A waterproof layer was formed to form a resin-impregnated nonwoven fabric having a thickness of 4.0 mm. The above resin-impregnated nonwoven fabric was adhered to the back surface of a decorative plywood in which a 0.3 mm-thick oak veneer was adhered to the surface of a 5-ply plywood having a thickness of 9.0 mm to produce a desired floor material.

[0012]

Example 2 The procedure of Example 1 was repeated, except that a groove was formed from the back surface of the veneer veneer veneer used in Example 1 to reach the second layer veneer from the front side of the plywood. The desired flooring was manufactured.

[0014]

[Example 3] The decorative plywood used in Example 2 was cut, and at the same time, a male and female knurls were formed on four sides to form a 9.0 mm thick, 60 mm wide.
mm, 900mm long rectangular plate,
The sheets were staggered by a certain dimension in the vertical direction so that the plane shape was stepped. The male and female knurls are loosely joined so that they can be slightly bent at the joints and fit easily into the irregularities of the base, and have a slight flexibility after curing in the grooves on the back surface of the joints. Melt resin was injected and joined. Then, the resin-impregnated nonwoven fabric having the two-layer structure used in Example 1 was adhered to the entire back surface to produce a desired floor material.

[0015]

Comparative Example 1 The procedure of Example 1 was repeated except that the resin-impregnated nonwoven fabric having the same material as the upper layer resin-impregnated nonwoven fabric and having a thickness of 4.0 mm was used instead of the resin-impregnated nonwoven fabric having the two-layer structure used in Example 1.
A desired flooring material was produced in the same manner as described above.

[0016]

Comparative Example 2 Example 1 was repeated except that the resin-impregnated nonwoven fabric of the same material as the lower layer resin-impregnated nonwoven fabric and having a thickness of 4.0 mm was used instead of the resin-impregnated nonwoven fabric of the two-layer structure used in Example 1.
A desired flooring material was produced in the same manner as described above.

FIG. 4 shows the results of measuring the soundproofing performance of the above-mentioned Examples 1-3 and Comparative Examples 1-2.

[0017]

Since the present invention is constructed as described above, it can be used for bonding a wooden board to a two-layer resin-impregnated nonwoven fabric, and also to apply the wood-based acoustic flooring material of the present invention to a concrete floor surface. Also in bonding, the adhesive hardly penetrates the resin-impregnated nonwoven fabric, and does not lower the buffering property of the resin-impregnated nonwoven fabric, so that the soundproofing is very excellent.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing one embodiment of a wooden soundproof flooring material according to the present invention.

FIG. 2 is a plan view showing another embodiment of the wooden soundproof flooring material according to the present invention.

FIG. 3 is a partial sectional view taken along line AA of FIG. 3;

FIG. 4 is a diagram comparing soundproofing performances of Examples 1 to 3 and Comparative Examples 1 and 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wooden board 2 Decorative layer 3 Resin impregnated nonwoven fabric of two-layer structure 4 Upper resin impregnated nonwoven fabric 5 Lower resin impregnated nonwoven fabric 6 Waterproof layer

Claims (2)

(57) [Claims] 1. In a wood-based sound-insulating flooring material in which a two-layer resin-impregnated nonwoven fabric is adhered to the back surface of a wooden board, the lower resin-impregnated nonwoven fabric is lower than the upper resin-impregnated nonwoven fabric in contact with the wood board. A wood-based sound-insulating floor material characterized by being soft and sparse and having a waterproof layer formed on the back surface of a lower resin-impregnated nonwoven fabric. 2. A wooden board is made of a 5-ply rectangular plywood, and a groove is formed so as to reach from a back surface of the plywood in a direction perpendicular to a longitudinal direction of the plywood and to reach a second layer veneer from the front side of the plywood. The wooden soundproof flooring material according to claim 1, wherein the flooring material is formed.