JPH02282564A - Floor backing damping material and floor material - Google Patents

Abstract

PURPOSE:To improve the lightweight floor shock sound cutoff performance by irregularly entangling natural fibers or synthetic fibers with a latex binder to form a damping material, sticking it on the rear face of a finishing material, and forming a floor material with a relatively hard material. CONSTITUTION:Natural fibers or synthetic fibers are irregularly entangled by a latex binder made of natural rubber or synthetic rubber to form a damping material 1. The damping material 1 is stuck on the rear face of the finishing material 2 of a floor material made of relatively hard wood, resin, or gypsum, and the finishing material 2 is formed into a square shape with the preset specification. The damping material 1 can hold necessary elasticity, and the deformation recovery characteristic and lightweight floor shock sound cutoff performance against the shock repetition load can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cushioning material and a flooring material used for the flooring of apartment complexes and the like.

[Conventional technology]

In recent years, in reinforced concrete housing complexes such as apartments and condominiums, there has been a tendency for wood-based flooring materials to be preferred over carpets. Reasons for this include asthma, dust mites, and difficulty in cleaning, but because floor heights are restricted, direct installation methods with a lower finished height have become mainstream, instead of conventional construction using rolling joists. If wood-based flooring is pasted directly onto a concrete slab, there is a problem that when the flooring receives a direct impact, vibrations will be transmitted through the flooring to the concrete slab of the building, and this will be transmitted to the downstairs floor, so it is not recommended for soundproofing. There wasn't.

Therefore, a cushioning material made of nonwoven fabric made of polymeric foam, synthetic sacrificial fiber, needle punch carpet, etc. is pasted on the back side of the wood-based flooring material that is applied directly to the concrete slab, and this cushioning material is applied to the concrete slab. A paste-on version was developed.

[Problem to be solved]

For finishing materials with polymer foam etc. pasted on the back side,
There have been disadvantages in that the thickness decreases due to repeated loads such as walking, and the thickness does not recover well after long-term installation of heavy items such as furniture, resulting in dents in the floor.

Therefore, this invention prevents thickness reduction due to repeated loads such as walking, improves thickness recovery after long-term installation of heavy items such as furniture, and furthermore provides an underfloor structure with excellent impact noise isolation performance for lightweight floors. OBJECT OF THE INVENTION To provide a cushioning material and a flooring material for ground. [Means for solving the problem] In order to achieve the above-mentioned object, the present invention provides a method of irregularly forming natural fibers or synthetic fibers with a latex binder. It is intertwined to form a cushioning material for flooring. In addition, a cushioning material for the floor base made by irregularly entwining natural fibers or synthetic fibers with a latex binder is attached to the back side of the finishing material, which is made of a relatively hard material and is formed into a rectangular shape according to a predetermined standard. It is a flooring material.

[Effect]

In this invention, since natural fibers or synthetic fibers are bonded with a latex binder, the cushioning material can maintain the required elasticity. If such a cushioning material is attached to the back side of the finishing material and integrated, it is possible to easily create a lightweight floor structure with excellent impact sound insulation performance by directly attaching the flooring material to a concrete slab, etc. It can be constructed.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cushioning material 1 for a floor subfloor, and this cushioning material 1 is:
It is made by randomly intertwining natural or synthetic fibers with a latex binder.

The latex binder for irregularly entangling natural fibers or synthetic fibers may be either natural rubber type or synthetic rubber type.

FIG. 2 shows a flooring cushioning material 1 shown in FIG. 1 attached to the back side of a finishing material 2 made of relatively hard wood, resin, or gypsum. The finishing material 2 is formed into a rectangular shape according to a predetermined standard.

For example, if the cushioning material 1 of the floor material shown in Fig. 2 is formed by irregularly intertwining vegetable fibers with a latex binder, it will not have the same thickness recovery characteristics against collapse as when using an olefin foam with a high expansion ratio. There are no bad inconveniences. Latex binder weight ratio is 15-6
0% is desirable, and the specific gravity of the molded cushioning material 1 is 0.05.
~0°3, and the thickness is preferably about 4 to 20 degrees. If the latex binder is less than 15% by weight, it is difficult to bond the fibers together, and if it exceeds 60% by weight, the binder will harden on the surface of the cushioning material 1, causing a problem that it will not be uniform. Here, the weight ratio of the latex binder refers to the ratio of the weight of the latex binder to the total weight of the cushioning material 1. If the specific gravity of the cushioning material 1 is less than 0.05, the cushioning material 1 itself will collapse before sagging or the like becomes a problem. Moreover, if the specific gravity exceeds 0.3, there will not be much air layer (space) left inside, which will adversely affect the sound insulation performance.

The flooring material shown in FIG. 3 is obtained by pasting a damping material 3 on the top surface of the finishing material 2 of the flooring material shown in FIG. 2, and pasting a surface material 4 such as plywood on the top surface of this damping material 3. shows. As the damping material 3, rubber-based, asphalt-based, plastic-based, inorganic-based, and composite materials thereof can be used. A flooring material using the damping material 3 has even more excellent lightweight floor impact sound insulation performance.

The floor material shown in FIG. 4 has a four-layer structure similar to that shown in FIG. 3, but has grooves 5 formed on the lower surface of the finishing material 2.

The presence of this groove 5 can reduce the contact area between the finishing material 2 and the cushioning material 1, making it possible to soften the spring at the beginning of deflection, that is, at the initial stage.

The flooring materials shown in FIGS. 2 to 4 may be integrally molded in a factory or the like, or may be constructed by sequentially laminating and bonding each layer on site.

In the graph shown in FIG. 5, the reference numeral I indicates the cushioning material 1 in which vegetable fibers are hardened with a latex binder with a weight ratio of 40%, and the specific gravity is 0.12. The experimental results using a sample with a thickness of 4 mm are shown. Also, what is indicated by ■ in the graph is
Polyethylene foam is used and the specific gravity is 0.02. The results of an experiment using a sample with a thickness of 4 mm are shown.

1. The static spring constant was the same for both cases indicated by II. As is clear from this graph, it can be seen that the floor cushioning material 1 of the present invention has excellent deformation recovery characteristics.

〔effect〕

As explained above, the cushioning material for flooring of the present invention is formed by irregularly intertwining natural fibers or synthetic fibers with a latex binder, so the presence of the latex binder maintains the required elasticity of the cushioning material. It has excellent deformation recovery characteristics due to repeated impact loads, and has excellent lightweight floor impact sound insulation performance.

In addition, flooring materials using such cushioning materials for subfloors provide a good walking feel and improve the soundproofing performance for downstairs, and if the cushioning material and finishing material are integrated, it will be easier to use on-site. Construction is also extremely simple.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the cushioning material for flooring of the present invention;
The figure is a cross-sectional view showing the flooring material, Figure 3 is a cross-sectional view showing another flooring material, Figure 4 is a cross-sectional view showing yet another flooring material, and Figure 5 shows the deformation recovery characteristics of polyethylene foam due to repeated impact loads. This is a graph comparing it with the body. 1...Cushioning material for floor base, 2...Finishing material.

Claims (1)

[Claims] 1. A cushioning material for a floor base formed by irregularly intertwining natural fibers or synthetic fibers with a latex binder. 2. A flooring material in which the cushioning material for a subfloor according to claim 1 is attached to the back side of a finishing material made of a relatively hard material and formed into a rectangular shape according to a predetermined standard.