JPH0663345B2 - Sound insulation wooden floor material - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a sound insulation wooden floor material suitable for being directly applied to a concrete floor material.

[Prior Art] Conventionally, in many cases, the floors of middle- and high-rise houses are made by directly attaching carpets to a concrete floor via felt. However, carpets are easily soiled, and the occurrence of mites has been a problem.

Therefore, instead of sticking carpets, it has been changed to construct a floor by directly adhering a wooden floor material with a foamed polyurethane sheet with a thickness of about 2 mm attached to the back surface to the concrete floor, but the wooden floor material is a carpet. Since it is inferior in sound insulation compared to other types, it has the drawback of impairing habitability.

[Problems to be Solved by the Invention] The inventors of the present invention have solved the above-mentioned problems and have conducted daily research for the purpose of providing a wooden flooring material having excellent sound insulation. The present invention has been completed by knowing that a material obtained by laminating a fiber mat and a foamed sheet, which are entangled with each other, is effective in improving sound insulation.

[Means for Solving the Problem] The present invention is characterized in that a fiber mat in which cotton-like fibers are entangled in a base cloth and a foamed sheet are sequentially attached to the back surface of a wooden board, which is a sound-insulating wooden floor. Related to the material.

The sound-insulating wooden flooring material of the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a wooden board, and a fiber mat 4 in which a cotton-like fiber 3 is entangled in a base cloth 2 and a foamed sheet are sequentially attached to the back surface of the wooden board 1.

As the wood board 1, plywood, particle board, hard board, LVL (parallel plywood), etc. can be mentioned, and a name wood veneer, a decorative synthetic resin sheet is attached to the surface of the wood board, or a decorative layer is formed by painting. May be formed.

The base cloth used for the fiber mat 4 in which the cotton-like fibers 3 are entangled with the base cloth 2 is preferably a synthetic resin woven cloth such as polyethylene or polypropylene, and the cotton-like fibers 3 are nylon, Synthetic resin fibers such as polyester and polypropylene are preferable in terms of waterproofness and durability, but are not limited thereto. In this way, by using the fiber mat in which the cotton-like fibers are entangled in the base cloth, the handleability of the base cloth and the cushioning property of the cotton-like fibers can be provided together.

As the foamed sheet 5, a foamed sheet made of a synthetic resin such as polyurethane resin, polyethylene resin, synthetic rubber or a foamed sheet of natural rubber can be used. The thickness is preferably 1 to 7 mm, but is not limited to this. If a large number of protrusions 6 are formed on the back surface of the foamed sheet, the protrusions reduce the contact area between the flooring material and the concrete surface, and thus the sound insulation performance can be further improved. This is because the sound insulation test of the cushioning material with and without the protrusion on the back surface is 125H, which is easily felt by human ears.
It can also be understood from the fact that at z and 250 Hz, those having protrusions were reduced by 1 to 2 decibels as compared with those not having protrusions.

The foamed sheet 5 may be formed by applying a foaming resin composition to the back surface of the fiber mat 4 and then foaming it, or may be formed before being attached to the fiber mat 4. It is preferable that the thickness of the both after adhesion is 4 to 10 mm. If the thickness is too thin, the sound insulation effect is poor, and if the thickness is too thick, there is an economical problem, but
When remodeling a house, the floorboard is too thick and is higher than the sill, which makes it practically impossible to construct, or the floorboard sinks significantly when walking on the floorboard.

A sheet 7 having a sound insulating property, a vibration damping property, or a cushioning property and an intermediate wooden plate 8 may be sandwiched between the wooden plate 1 and the fiber mat 4. In this case, the thickness of the wooden board 1 and the intermediate wooden board 8 is 2.5.
˜4.0 mm is preferable, but not limited to this.
If the thickness is too thin, the rigidity of the floor board becomes a problem, and if it is too thick, it may cause a problem during transportation and construction, as well as cost.

Examples of the sound-insulating or vibration-damping sheet to be attached to the back surface of the wooden board 1 include a powder lead-containing vinyl chloride sheet, an inorganic powder-filled rubber sheet, a vinyl chloride sheet, and the like, and a thickness of 0.8 to 2 mm is preferable. The cushioning sheet may be a cushioning sheet such as a natural rubber foam sheet or an olefin foam sheet, and preferably has a thickness of 1 to 2 mm.

Further, if a perforated wood board is used as the intermediate wood board 8, the sound insulation is further improved. Hole diameter of perforated wood board is 5-15mm
Is preferred but not limited to this.

In addition, as shown in FIG. 3, a wooden board which is a combination of a surface wooden board, a sheet having sound insulation, vibration damping or sound insulation, and an intermediate wooden board is divided into smaller pieces and the combination is smaller. It has better sound insulation than a large size wooden board that is not broken.
It is considered that this is because it becomes difficult for the sound to propagate in the small parts. The wooden board that has been split into small pieces as described above has a loose tongue process that allows slight bending on the wood mouth surface, and is flexible after hardening in the groove on the back surface caused by tongue and groove joints. The melt resin 9 is poured and bonded, and the fiber mat 4 and the foamed sheet 5 in which the cotton cloth 3 is entangled with the base cloth 2 are bonded to the entire back surface thereof.

[Example 1] The back surface of a decorative plywood having a size of 30 cm x 90 cm and a thickness of 7.5 mm has a 3 mm-thick fiber mat in which a polyester cotton fiber is entangled with a polypropylene base cloth by a needle punch method, and has many irregularities on the back surface. A desired floor material was manufactured by laminating a foamed polyethylene sheet having a thickness of 5 mm (an independent foamed sheet is preferable in consideration of waterproofness).

[Example 2] 30 cm x 90 cm size, 2.8 mm thick decorative plywood, 2.0 mm thick natural rubber foam sheet, 2.7 mm thick, perforated plywood with 10 mm hole diameter, polypropylene base cloth and polyester cotton 3 mm thick fiber mat entangled with filament-shaped fibers and 5 mm thick foamed polyethylene sheet with many irregularities on the back (separate foamed sheet is preferable if waterproof is taken into consideration) Was manufactured.

[Example 3] The wood board, the foam sheet, and the perforated wood board used in Example 2 were laminated in this order, and then cut to have a thickness of 7.5 mm and a width of 60 m.
An elongated rectangular plate material having a length of m and a length of 900 mm was produced, and five sheets were vertically displaced and joined with male and female groves. The male and female ridges are slightly joined at the joints and are loosely joined so that they easily fit into the irregularities of the base. Melt resin was injected and joined. Then, on the entire back surface, a fiber mat with a thickness of 3 mm made by entwining polyester cotton fibers with a polypropylene base cloth by a needle punching method and a foamed polyethylene sheet with a thickness of 5 mm with many irregularities on the back surface (independent foaming if considering waterproofness) The desired flooring was manufactured by laminating the sheets.

[Effects of the Invention] The results of measuring the sound insulation properties (lightweight floor impact sound level) of the flooring materials obtained in Examples 1 to 3 and ordinary concrete slabs are as shown in Fig. 4. Very good sound insulation. Further, since the cotton-like fibers are used by being entangled with the base cloth, the handling of the cotton-like fibers can be eliminated without impairing the cushioning property of the cotton-like fibers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 are sectional views showing a sound-insulating wood-based flooring material as an embodiment of the present invention, and FIG. 4 is sound insulation of the flooring material of FIGS. 1 to 3. It is a figure which shows sex. In the drawings, 1 is a wooden board, 2 is a base cloth, 3 is a cotton fiber, 4 is a fiber mat, 5 is a foamed sheet, 7 is a sheet having sound insulation, vibration damping or cushioning, 8 is an intermediate wooden board, 9 Indicates a hot melt resin.

Claims (4)

[Claims] 1. A sound-insulating wood flooring characterized in that a fiber mat in which cotton-like fibers are entangled in a base cloth and a foamed sheet are sequentially attached to the back surface of a wood board. 2. A sound-insulating, vibration-damping or cushioning sheet, an intermediate wood board, a fiber mat in which cotton-like fibers are entangled in a base cloth, and a foamed sheet are sequentially attached to the back surface of the wood board. Sound-insulating wood-based flooring. 3. The sound insulating wood flooring material according to claim 1, wherein the intermediate wood board is a perforated wood board. 4. The sound-insulating wood-based flooring material according to claim 2, wherein a large number of protrusions are formed on the back surface of the foamed sheet.