JPH04124367A - Sound insulation wood flooring - Google Patents

Abstract

PURPOSE:To promote sound insulating efficiency by sticking a nonwoven fabric on the rear of a woody plate, and forming a foam able painting layer so that a part of the nonwoven fabric is substantially exposed to the rear thereof. CONSTITUTION:A mat-shaped nonwoven fabric 2 is stuck on the rear of a woody plate 1 such as a plywood, etc. After that, a foam able painting layer 3 is applied to the rear of the nonwoven fabric 2 in the shapes of striped projections and recessions, with recessions 5 formed in projections 4 at a specific interval. In striped recessions 6, a part of the nonwoven fabric 2 is substantially in a state exposure to facilitate air escape. According to the constitution, sound insulating efficiency can be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a sound-insulating wooden flooring material with excellent sound-insulating performance.

[Prior art] Recently, wood flooring has been increasingly used instead of carpet for the floors of mid-to-high-rise residences, but wood flooring has inferior sound insulation properties compared to carpet/wood flooring. Because there are
Problem to be Solved by the Invention] The present inventor has made this invention as a result of his daily research in order to eliminate the above-mentioned drawbacks and provide a wood-based flooring material with excellent sound insulation properties. completed.

[Means for Solving the Problems] The present invention is characterized in that a nonwoven fabric is adhered to the back side of a wooden board, and a foamed paint layer is formed on the back side so that a portion of the nonwoven fabric is substantially exposed. This relates to sound-insulating wood flooring materials.

Hereinafter, the sound-insulating wooden flooring material of the present invention will be explained in detail with reference to the drawings. In FIG. 1, 1 is a wooden board, and a nonwoven fabric 2 is pasted on the back side of this wooden board 1. Then, a foamed paint layer 3 is formed on the back surface so that a part of the nonwoven fabric is substantially exposed.

As the wood board 1, plywood, particle board, hardboard, LVL (parallel plywood), etc. are used.

A decorative layer may be formed by pasting a precious wood veneer or a decorative synthetic resin sheet on the surface of this wooden board, or by painting it.

The non-woven fabric 2 is made by forming one or more types of fibers such as polyester fibers, polypropylene fibers, nylon fibers, etc. into a dot shape using a needle punch method, for example, by melting some of the fibers with heat and welding the dots together. Those formed into a matte shape by using both of the above methods together can be used. If the thickness of the fibers is too thin, the mat-like nonwoven fabric may become flattened and the sound insulation performance will deteriorate.If the fibers are too thick, the cushioning effect will be reduced and the sound insulation performance will deteriorate.
~50 denier, preferably 6-30 denier is optimal. The thickness of the mat is preferably 2 to 10 mm, preferably 4 to 6 mm, but is not limited to this.

The foamed paint layer 3 formed on the back side of the nonwoven fabric 2, in which a part of the nonwoven fabric is substantially exposed, is made of natural rubber, methyl methacrylate rubber (MGR), nitrile butadiene rubber (N
If necessary, a foaming agent is added to synthetic rubber such as BR), styrene-butadiene rubber (SBR) (two or more types may be mixed), and the mixture is stirred to form a foamed state, and then the back surface of the nonwoven fabric is made with uneven surfaces. Afterwards, after heating a little, a part of the convex part 4 is pressed with a concave-convex roll to form a concave part 5, or with little or no stirring, it can be applied to the back side of the nonwoven fabric. After coating, it is heated and foamed, and a part of the convex part 4 is pressed with a concavo-convex roll to form a concave part 5.

The thickness of the convex portion 4 of the foamed paint layer 3 is preferably 2 to 5 mm, but is not limited to this. If the thickness is too thin, the sound insulation performance will be poor, and if the thickness is too thick, there will be economic problems. However, when walking on the floorboards, the floorboards sink too much, making it uncomfortable to walk.

This feeling of walking occurs even if the nonwoven fabric is too thick.

In the present invention, the foamed paint layer 3 in which a portion of the nonwoven fabric is substantially exposed will be described in detail.

2 is a back view of the sound insulating floorboard in FIG. 1, and FIG. 3 is a sectional view taken along line A-A in FIG. 2. The foamed paint layer 3 is clearly visible from FIGS. like.

Although it is applied to the entire surface of the nonwoven fabric 2 attached to the back side of the wooden board 1, the foamed paint layer 3 is not smooth, but has an uneven shape with vertical stripes, and the convex portions 4 are coated at regular intervals. dent 5
is formed.

On the other hand, air can easily escape from the vertically striped concave portions 6 even if there is a thin paint layer. In addition,
In the embodiment diagram, a paint layer is also formed in the recess 6, but the recess 6 does not necessarily require a paint layer.

In this way, when a part of the nonwoven fabric is substantially exposed, the impact applied to the floor is alleviated by the air quickly escaping from the exposed part, reducing the impact noise to the downstairs. It is thought that this can also be alleviated.

As shown in FIG.
]1! It may be composed of a sheet 8 having sound properties, vibration damping properties, or cushioning properties, and a back wood board 7b. In this case, the thickness of the front wood board 7a and the back wood board 7b is 2.5 to 4.011 mm.
is preferable, but not limited to this. If the thickness is too thin, the rigidity as a floor plate will be a problem, and if it is too thick, it may cause problems during transportation and construction, not to mention the cost.

Examples of the sound insulation or vibration damping sheet to be bonded to the back surface of the front wooden board 7a include powdered sailor PVC sheet, inorganic powder-filled rubber sheet, PVC sheet, etc., and the thickness is 0.8 to 2.
A sheet with a thickness of 1 to 2 mm is preferable, and the cushioning sheet may be any sheet with cushioning properties such as a natural rubber or synthetic rubber foam sheet or an olefin foam sheet, and the thickness is 1 to 2 mm.
mm is preferred.

Furthermore, if a perforated wooden board is used as the backside wooden board 7b, the sound insulation properties will be further improved. The hole diameter of the perforated wood board is 5 to 1
The above-mentioned perforated wood board, which is preferably 5 mm in diameter but is not limited to this, is effective, but if two perforated wood boards are bonded together with the holes shifted, the sound insulation effect can be improved.

In addition, as shown in Figure 5, the wooden board is made by combining a wooden board on the front surface, a sheet with sound insulation, vibration damping, or sound insulation properties, and a wooden board on the first side into small pieces. However, it has better sound insulation than large-sized wood 4 that is not divided into small pieces. This is thought to be because the sound is divided into small parts and becomes difficult to propagate in one part. As mentioned above, the wood board 9 that has been split into small pieces has a loose tongue processing on the end surface of the wood board so that it can be bent slightly, and there is a hardened flexible groove in the groove on the back side created by the tongue joint. A hot-melt resin with properties is poured in and combined.

[Example 1] On the back side of a 2-thickness, 5-layer nonwoven fabric made of polyester fibers with a thickness of 12 deniers, a foamed paint containing natural rubber as a main component was applied to the entire surface, and convex portions (height: 3 mm) were applied in vertical stripes. ) is applied, heated to a temperature of 50 to 120 degrees, and then a concave-convex roll is used to form indentations in some of the convex portions, and this sheet is then rolled into a sheet with a size of 30 cm x 90 cm and a thickness of 7.
A desired flooring material was manufactured by pasting it on the back side of 5 layers of decorative plywood.

[Example 2] 8 m thick made of polyester m fiber with a thickness of 12 denier
After applying a foamed paint containing natural rubber as a main component to the back side of the non-woven fabric No. m so as to form convex portions (4 mm in height) in the form of vertical stripes, the unevenness was heated to a temperature of 50 to 120 degrees. A recess is formed in a part of the above-mentioned convex part with a roll, and then this sheet is made into a sheet with a size of 30 cm x H cm and a thickness of 2.81 cm.
[Example 3] A desired flooring material was manufactured by attaching a decorative plywood of 2.0 mm, a natural rubber foam sheet with a thickness of 2.7 mm, and a perforated plywood with a thickness of 2.7 mm and a hole diameter of 10 mm to the back side.8 [Example 3] Implementation After laminating the wood board, foam sheet, and perforated wood board used in Example 2 in sequence, this was cut to a thickness of 7.5 mm.
Long and thin rectangular plates with a width of 60 and a length of 900 mm were manufactured, and five of these were slightly shifted in the vertical direction so that the planar shape became step-like, and they were joined with male and female grooves. The male and female grooves are slightly bent at the joint, and are loosely joined to conform to the unevenness of the underlying surface.In addition, a hot plate that has some flexibility after curing is placed in the groove on the back of the joint. They were joined by injecting melt resin. Then, the sheet used in Example 2 was adhered to the entire back surface to produce a desired flooring material.

[Effects of the Invention] The measurement results of the sound insulation properties (lightweight floor impact sound level) of the flooring materials obtained in Examples 1 to 3 and the ordinary concrete slab surface are as shown in FIG. 6, and the flooring materials of the present invention It has excellent sound insulation properties.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a sound insulating wooden flooring material as an embodiment of the present invention, Fig. 182 is a partial back view of Fig. 1, Fig. 3 is a sectional view taken along the line AA in Fig. 82, and Fig. 4 5 are sectional views and plan views showing other embodiments of the present invention, and FIG. 6 is a diagram showing the sound insulation properties of the flooring material of the present invention. In the drawings, 1 is a wooden board, 2 is a non-woven fabric, 3 is a foamed paint layer, 4 is a convex part, 5 is a recess, 6 is a concave part, 7a is a front wood board, 7b is a back wood board, 8 is a sound insulation property, vibration damping property Or a sheet having cushioning properties, 9 indicates a wooden board divided into small pieces. Patent applicant Eidai Sangyo Co., Ltd. Figure 1 Figure 2 Figure 2 Figure j Figure 3

Claims (3)

[Claims] (1) A sound-insulating wood flooring material, characterized in that a nonwoven fabric is adhered to the back side of a wooden board, and a foamed paint layer is formed on the back side so that a portion of the nonwoven fabric is substantially exposed. (2) The sound-insulating wooden flooring material according to claim (1), wherein the wooden board is composed of a front wooden board, a sheet having sound insulation, vibration damping, or buffering properties, and a back wooden board. . (3) The sound-insulating wood flooring material according to claim (2), wherein the backside wood board is a perforated wood board.