JP2995528B2 - Floor material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to flooring.

[0002]

2. Description of the Related Art Conventionally, there has been known a directly adhered floor material in which a cushioning material such as a synthetic resin or rubber foam is adhered to the back surface of a floor substrate so as to impart soundproofing performance and non-absorbent performance to a construction base surface. I have.

[0003]

Generally, the floor substrate and the cushioning material are bonded by applying an adhesive to the entire back surface of the flooring material, placing the cushioning material, and pressing the cushioning material.
The adhesive layer on the back surface of the floor material is interposed between the floor material substrate and the cushioning material as a flat surface. Therefore, the solid-borne sound that has entered the floor material from the front side is transmitted as vibrations in the floor material substrate, the adhesive layer, and the cushioning material, and is attenuated while being absorbed as heat energy. However, the solid-borne sound, which is attenuated but reaches the construction base surface such as a slab, is reflected from the base material surface, and the others pass through the construction base and are transmitted downstairs as transmitted sound. The sound reflected on the construction base surface is transmitted from the cushioning material to the floor substrate as solid-borne sound, and at the same time, a part of the sound is reflected and proceeds toward the construction base surface. During the repetition of this reflection, a resonance phenomenon occurs in the floor material substrate, which causes a reduction in the soundproofing effect.

[0004]

In order to solve such problems, the present inventor diligently aims to prevent the occurrence of a resonance phenomenon of the floor substrate caused by reflection on the back surface of the floor substrate and on the base surface for construction. As a result of repeated studies, the present invention has been achieved.

That is, according to the present invention, in a flooring material in which a cushioning material 2 is adhered to the back surface of a floor substrate 1 via an adhesive 3, a closed-cell foam having irregularities on the surface is used as the cushioning material 2. The present invention also relates to a floor material in which an adhesive is interposed on the surface layer of the cushioning material 2 as an adhesive layer having a lower end surface having an uneven surface.

According to the flooring material of the present invention, the adhesive 3 used for integrating the floor substrate 1 and the cushioning material 2 is interposed in the surface layer portion of the cushioning material 2 as an adhesive layer having a lower end surface having an uneven surface. In addition, the sound reflected from the construction base surface having a higher density than the cushioning material 2 is reflected by the lower end surface of the adhesive 3. At the same time, by forming the lower end surface of the adhesive non-uniformly so that there is no surface parallel to the base surface for construction, the direction of reflection by the lower end surface can be dispersed over a wide range at random like a wall of an anechoic chamber. Thus, the reflected sound is absorbed in the buffer material 2 in a wide range, and the resonance phenomenon of the floor board due to the reflected sound is suppressed.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of the flooring material of the present invention.
The flooring material of the present invention has a cushioning material 2 bonded via an adhesive 3 to the back surface of a floor substrate 1 having a decorative layer 1a formed on the front surface if necessary. 2 is interposed as an adhesive layer having an uneven surface at the lower end surface.

As the floor substrate 1 forming the floor material of the present invention, for example, a plywood, a wood chipboard, a wood fiber board, a veneer laminate, a cement board, a slag gypsum board alone or in any combination is combined. Alternatively, it is possible to use a laminate in which a synthetic resin sheet, a foam synthetic resin sheet, a sound insulation sheet, or the like having an excellent buffer effect is sandwiched between plate materials.

An optional decorative layer 1a can be formed on the surface of the substrate. This decorative layer, natural veneer obtained by cutting natural wood, artificial veneer, and nonwoven fabric, paper, veneer sheet backed with synthetic resin sheet, or decorative paper,
It is formed by bonding a decorative sheet such as a resin-impregnated paper, nonwoven fabric, paper, or synthetic resin sheet using an adhesive, or by directly painting or printing on the surface of the decorative plate.

[0010] An overcoat layer may be provided on the surface of the decorative layer. By providing such a decorative layer,
Moisture permeation from the surface side is also prevented, and problems such as warpage, dew condensation, and corrosion due to a change in humidity can be solved.

Further, by forming a groove from the back side of the floor substrate 1, the rigidity of the floor substrate 1 is reduced, and when an impact is applied to the floor material surface, the impact is absorbed by deformation of the floor substrate 1 itself. The soundproofing performance can be improved.

The cushioning material 2 of the present invention has a cushioning function of absorbing the shock applied to the surface of the floor substrate 1 by contracting and deforming. For example, a polyethylene resin, a polypropylene resin, a polyurethane resin, A closed cell synthetic resin foam such as a polystyrene resin or a vinyl chloride resin, or a rubber foam can be used.

Such a cushioning material 2 has a very low density relative to the floor substrate 1 and the adhesive 3, and the performance of reflecting sound on the front and back surfaces is much lower than that of the floor substrate 1 and the adhesive 3. It is low.

Further, in the present invention, in order for the adhesive 3 to be interposed in the surface layer portion of the cushioning material 2 as an adhesive layer having an irregular surface at the lower end surface, the concave portion of the cushioning material 2 having the irregularities formed on the surface is required. The adhesive layer is formed in a state where the adhesive 3 is filled.

As described above, since the high-density adhesive is interposed in the surface layer of the cushioning material 2 as an adhesive layer having an uneven surface at the lower end surface, the adhesive is reflected by the groundwork surface and transmitted through the cushioning material 2. Most of the vibration is reflected on the lower end surface of the adhesive 3 having high density.

Further, since the lower end surface of the adhesive 3 is unevenly uneven, when the sound is emitted toward the wall of the anechoic chamber, there is no parallel surface, so that the sound source is a sound source. Is not reflected at all and does not echo at all, and what is reflected by the lower end face of the adhesive layer forming the uneven surface is dispersed in a very wide range at random.

Therefore, in the conventional case where the adhesive is formed on a uniform surface parallel to the back surface of the floor substrate, the lower end surface of the adhesive is parallel to the base surface of the work, and the base surface of the work and the lower end surface of the adhesive are parallel to each other. Are reflected many times between substantially the same places, and are slightly attenuated when passing through a portion corresponding to the thickness of the cushioning material, which is the shortest distance therebetween. For example, the adhesive is dispersed in a wide range by the lower end surface of the adhesive layer forming the uneven surface, and the vibration energy can be attenuated by utilizing the inside of the buffer material in a very wide range.

In order to interpose an adhesive layer in which the lower end surface of the adhesive 3 has an uneven surface on the surface layer portion of the cushioning material 2, for example, as shown in FIG. By using a material that is difficult to be impregnated with the adhesive 3 of the above, and using a material in which the surface of the cushioning material 2 is subjected to the unevenness processing 2a, the adhesive 3 permeates into the concave portion of the unevenness processing 2a and is hardened. The lower end surface of 3 can integrate the cushioning material 2 and the floor substrate 1 in a state where the lower end surface is unevenly penetrated.

Further, as the adhesive 3 of the present invention, a commonly used adhesive can be used. By using an adhesive having a specific gravity increased by mixing heavy substance powder, the adhesive 3 can be used. The ratio of reflection at the lower end surface of the work can be increased, and most of the sound reflected from the base
Can be dispersed over a wide range at the lower end surface of the.

The flooring material of the present invention can be applied not only to a concrete ground surface, but also to a wooden house, and can be sufficiently used as a flooring material to be constructed after plywood or the like is disposed. It is. Further, the configuration of the flooring material of the present invention is not limited to the flooring material, and can be sufficiently applied to building plates such as wall materials and ceiling materials.

[0021]

According to the flooring material of the present invention, the adhesive layer formed on the surface layer of the cushioning material 2 is non-uniformly penetrated and cured along the uneven surface of the surface of the cushioning material 2 to form the adhesive layer. The sound that has been formed and reflected from the construction base surface is reflected by the lower end surface of the three-layer adhesive forming the uneven surface, and at the same time, the lower end surface is uneven so that there is no surface parallel to the construction base surface. By forming this, the direction of reflection by the lower end surface is dispersed in a random and wide range like a wall of an anechoic chamber, absorbed in a cushioning material, and a resonance phenomenon of the floor substrate due to the reflected sound is suppressed. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the flooring material of the present invention,

FIG. 2 is a cross-sectional view when a closed-cell foam is used as a cushioning material 2, 1: floor substrate, 1a: decorative layer, 2: cushioning material, 2a: unevenness, 3: adhesive.

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Claims (1)

(57) [Claims] 1. A floor material having a cushioning material attached to the back surface of a floor substrate via an adhesive, wherein a closed-cell foam having irregularities on its surface is used as a cushioning material, and a surface layer portion of the cushioning material is used. A floor material, wherein an adhesive is interposed as an adhesive layer having a lower end surface having an uneven surface.