JP2014077270A - Sound insulation floor material for water section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor material which hardly causes corrosion, expansion and discoloration even though being constructed in a toilet, a washroom, a kitchen and the like, also gives proper walking feeling, and has sufficient floor impact sound insulation characteristics (sound insulating properties).SOLUTION: The floor material is used by being laid on a surface of a floor face, and has a hard layer at a surface side and a soft layer at a floor face side. The hard layer is formed of a synthetic resin-based substrate, and has a bending elastic modulus of 400-3,000 MPa which is measured in conformity to JIS_K_7171. The soft layer is formed of a synthetic resin-based foamed body, has a compression hardness of 55-70 N which is measured in conformity to JIS_K_6400-2_D method, and has a thickness of 4-7 mm.

Description

  The present invention relates to a flooring material used by laying around a water such as a toilet, a washroom, a kitchen, etc., and particularly water having a floor impact sound insulation performance (sound insulation property) and a cushioning property having a good walking feeling. Related to sound insulation flooring.

  In recent years, flooring materials are often used for floors of apartment houses such as detached houses and condominiums. Known flooring materials include those coated on a wood substrate such as plywood, MDF, and particle board, and those laminated with a decorative sheet.

  Flooring materials are also laid around the water in toilets, washrooms, kitchens, etc. to create a space that is continuous with the living room or living room. It is often found to cause. Therefore, a long sheet such as a cushion floor made of a synthetic resin material is often applied.

  On the other hand, flooring materials can be roughly classified into two types: flooring materials that are directly attached to concrete slabs, and types that are attached to a double floor system. In order to secure the sound insulation performance to the downstairs when the flooring material is directly attached to the concrete slab, the sound insulation performance is expressed by bonding a nonwoven fabric or a synthetic resin foam to the back surface of the wooden base material. On the other hand, as mentioned above, cushion floors are installed around the water in toilets, washrooms, kitchens, etc., from the viewpoint of water resistance and humidity resistance, but they do not have sound insulation performance and may be transmitted as noise downstairs. .

Japanese Patent No. 2781027 JP2007-198084

  The present invention has been made to solve such problems, that is, the problem is that even if it is applied to a toilet, a washroom, a kitchen, etc., it does not easily rot, swell, or discolor, It is another object of the present invention to provide a flooring material having a sufficient walking impact sound insulation performance (sound insulation property) while having a firm walking feeling.

  The present invention solves this problem, that is, the invention according to claim 1 is a floor material having a hard layer on the surface side and a soft layer on the floor surface side of the floor material laid on the floor surface. The hard layer is made of a synthetic resin base material, the flexural modulus measured according to JIS_K_7171 is 400 to 3000 MPa, the soft layer is made of a synthetic resin foam, and conforms to JIS_K_6400-2D method. It is a sound insulation flooring material for water around, characterized by having a compression hardness of 55 to 70 N and a thickness of 4 to 7 mm.

  According to the first aspect of the present invention, the hard layer is made of a synthetic resin base material and the soft layer is made of a synthetic resin foam, so that it has waterproof properties, and the bending elastic modulus of the hard layer is By limiting the compression hardness of the soft layer, it is possible to obtain a floor material having sound insulation.

It is explanatory drawing which shows the structure of the cross section of one Example of the sound insulation flooring material for the surroundings of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an embodiment of a sound insulation flooring material for water around the present invention. A soft layer 3 and a hard layer 5 are provided on the floor surface 1, and a decorative sheet 7 is appropriately provided on the surface. Adhesive layers 2, 4, and 6 are appropriately provided between the respective layers.

  The material used for the soft layer 3 in the present invention is made of a synthetic resin-based foam, is softer than the hard layer 5 described later, has a compression hardness of 55 to 70 N based on the JIS_K_6400-2D method, and a thickness of What is 4-7 mm is used. By adjusting the expansion ratio with a synthetic resin-based foam, there is waterproofness, and it becomes possible to adjust within the range of this value. Within the range of this value, the combination with the hard layer 5 described later enables the flooring material to have both sound insulation performance and good walking feeling with a better balance. If the compression hardness is lower than 55N, the feeling of walking is remarkably impaired because the compression hardness is too high. If the compression hardness exceeds 70N, the sound insulation performance is deteriorated because the compression hardness is too high.

  The present inventors have made trial and error to find this condition setting. However, if the condition setting is determined, it is possible to adjust and obtain a desired material by a conventionally known material or manufacturing technique. Specifically, a foamed polyurethane sheet having an expansion ratio of 20 to 70 times is preferably used.

  The hard layer 5 in the present invention is harder than the soft layer 3 and is made of a synthetic resin base material and has a flexural modulus of 400 to 3000 MPa measured according to JIS_K — 7171. If the thickness or the like is adjusted with the synthetic resin base material, it is waterproof and can be adjusted within the range of this value. Within the range of this value, the combination with the soft layer 3 allows the flooring to have both sound insulation performance and good walking feeling with a better balance. The bending elastic modulus of the hard layer 5 greatly contributes to the sound insulation performance. If it is harder than 3000 MPa, the sound insulation performance is lowered. On the other hand, if it is softer than 400 MPa, the walking feeling is remarkably impaired. Become. The present inventors have made trial and error to find this condition setting. However, if the condition setting is determined, it is possible to adjust and obtain a desired material by a conventionally known material or manufacturing technique. Specifically, what is obtained by foaming a polyolefin resin containing talc and wood powder by melting and heating, with a thickness of about 3 to 9 mm, 0 to 2 times is preferably used.

  As the decorative sheet 7 on the surface, it can be appropriately used as long as it is a known one comprising a pattern layer for imparting design properties to the flooring, a surface protective layer for imparting scratch resistance and various physical properties to the flooring, There is no particular limitation. If the hard layer 5 has a thickness of about 3 to 9 mm and is obtained by foaming a polyolefin resin containing talc or wood powder by melting and heating and mixing it 0 to 2 times, the polyolefin resin sheet is used as a base sheet. Those are preferably used.

  Adhesive layers 2, 4, and 6 that are appropriately provided are not particularly limited as long as they can respectively adhere the soft layer 3, the hard layer 5, and the decorative sheet 7. Adhesive double-sided tapes may be used, and two-component urethane water-based adhesives, one-component vinyl acetate resin emulsion-based adhesives, moisture-curing urethane resin-based hot-melt adhesives, etc., particularly moisture-curing types A urethane hot melt adhesive is preferably used. The thickness is preferably about 10 to 100 μm after drying.

  70 parts by weight of polypropylene (“E105” manufactured by Prime Polymer Co., Ltd.) was used as the hard layer 5, and 10 parts by weight of talc and 20 parts by weight of wood flour were melt-heated and mixed at a setting of 200 ° C. On the other hand, the actual mold having a thickness of 5 mm and a width of 150 mm is attached to the tip of the extruder, and using this, the molten resin is extruded at an expansion ratio of 1.6 times, and the same mold as the mold in which cooling water is circulated. After being drawn into the cooling mold and cooled and solidified, it was cut and deposited to a length of 900 mm, heated in an oven at 80 ° C. for 6 hours, and then cooled with outside air to obtain a hard layer 5 made of a wood resin base material. When the bending elastic modulus of this hard layer was measured in accordance with JIS_K — 7171, it was 2132 MPa.

  A foamed polyurethane sheet (“CF4.0t” manufactured by Bridgestone Corporation) having a compression hardness of 60 N and a thickness of 4 mm measured according to the JIS_K — 6400-2D method is used as the soft layer 3, and an epoxy resin adhesive is attached to the back surface of the hard layer 5. Bonded with an agent. Further, a double-sided tape with an acrylic resin adhesive having a thickness of 150 μm was bonded to the lowermost layer.

A decorative pattern 7 is printed on a colored thermoplastic resin layer made of polypropylene resin having a thickness of 0.070 mm (“RIVEST_TPO” manufactured by Riken Technos Co., Ltd.) with a two-component urethane resin binder gravure ink as a pattern layer, A transparent polypropylene resin is extruded and laminated as a transparent thermoplastic resin layer, a two-component urethane resin having a coating amount of 1.3 g / m ² after drying is applied as a recoat layer thereon, and an ultraviolet ray is applied as a surface protective layer thereon. A curable coating was applied and cured at 10 g / m ² to obtain a decorative sheet 7. A moisture curable urethane resin hot melt adhesive (“Tyforce” manufactured by DIC Corporation) was applied to the back surface of the decorative sheet 7 thus obtained so as to have a thickness of 50 μm, and was applied to the surface of the hard layer 5. A laminated flooring was obtained.

<Comparative Example 1>
A flooring material was obtained in the same manner as in Example 1 except that the amount of foaming agent added as the hard layer 5 was increased and the foaming ratio was extruded 2.5 times to obtain a flexural modulus of 315 MPa measured according to JIS_K — 7171. .

<Comparative Example 2>
A flooring material was obtained in the same manner as in Example 1 except that the amount of foaming agent added was reduced as the hard layer 5 and the foaming ratio was extruded at 1.05 times to obtain a flexural modulus of 3312 MPa measured according to JIS_K — 7171. .

<Comparative Example 3>
A flooring was obtained in the same manner as in Example 1 except that a foamed polyurethane sheet having a compression hardness of 40 N measured according to the JIS_K — 6400-2D method (“TF4.0t” manufactured by Bridgestone Corporation) was used as the soft layer 3. .

<Comparative Example 4>
A flooring material was obtained in the same manner as in Example 1 except that a foamed polyurethane sheet ("DG4.0t" manufactured by Bridgestone Corporation) having a compression hardness of 90 N measured according to the JIS_K_6400-2D method was used as the soft layer 3. .

<Comparative Example 5>
A flooring was obtained in the same manner as in Example 1 except that the thickness of the foamed urethane sheet of the soft layer 3 was 3 mm.

<Comparative Example 6>
A flooring was obtained in the same manner as in Example 1 except that the foamed urethane sheet of the soft layer 3 had a thickness of 8 mm.

<Comparative Example 7>
A flooring was obtained in the same manner as in Example 1 except that the hard layer 3 was grooved on the back surface of a 9 mm plywood and a wood substrate having a flexural modulus of 540 MPa measured according to JIS_K — 7171 was used.

<Performance evaluation>
The performance evaluation shown below was performed about each flooring of an Example and Comparative Examples 1-5.

<Floor impact sound tolerance level>
The light floor impact sound level was measured by a method based on JIS-A — 1418, and the allowable level LL-45 was evaluated as “◯”.

<Walking comfort>
Each flooring was constructed on a concrete slab using double-sided tape, and several people actually walked on it to perform a sensory evaluation on floor noise, walking sensation, and floor softness. The one with many people who evaluated it as good was rated as ○.

<Water resistance>
After being immersed in 70 ° C. warm water for 2 hours, it was dried in a 60 ° C. oven for 3 hours, and the thickness increase rate was measured. An increase rate of less than 1% was marked as ◯. The results are shown in Table 1.

  The sound insulation flooring material of the present invention can be used by laying it around a water such as a toilet, a washroom, and a kitchen.

DESCRIPTION OF SYMBOLS 1 ... Floor surface 2 ... Adhesive layer 3 ... Soft layer 4 ... Adhesive layer 5 ... Hard layer 6 ... Adhesive layer 7 ... Cosmetic sheet

Claims (1)

  Floor material laid on the surface of the floor surface, which has a hard layer on the surface side and a soft layer on the floor surface side, the hard layer is made of a synthetic resin base material and measured according to JIS_K_7171 The bending elastic modulus is 400 to 3000 MPa, the soft layer is made of a synthetic resin foam, the compression hardness is 55 to 70 N and the thickness is 4 to 7 mm according to the JIS_K_6400-2D method. Sound insulation flooring around water.