JPS6389776A - Wooden finish floor material excellent in vibration control property - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wood-finished flooring material with excellent vibration damping properties suitable for interior use in concrete buildings.

(Prior art and its problems) In concrete buildings such as condominiums, the impact on the structure and the vibrations generated thereby propagate within the structure as solid sound, causing sound to be transmitted from the upper floor to the lower floor, for example. The main cause of noise generation is the propagation of noise. Conventionally, in order to prevent the generation and propagation of such solid-body sound, a so-called floating floor structure has been adopted in which an insulated concrete floor is installed, but this reduces the floor height of the building and makes construction easier. There are also problems in that the process is about three times that of a direct bonding structure.

On the other hand, long-pile carpets are often used because they are effective in reducing floor impact noise, but carpets have drawbacks such as getting dirty easily and becoming a breeding ground for mold and dust mites. Therefore, in recent years, there has been a demand for wood-finished floors. However, although wood-finished floors are a material that is sufficient to satisfy livability, such as the calm atmosphere of wood, long-term cleanliness, and the beauty of the wood grain, there is one drawback:
There is a problem in that it is difficult to alleviate floor impact noise. In other words, in order to reduce floor impact noise, many materials such as glass wool, rock wool, gypsum board, sound insulating rubber, centimeter board, etc. are laminated, and sound absorbing materials and anti-vibration hanging devices are also installed on the ceiling. Otherwise, it will not be possible to respond adequately, and the cost and man-hours will be enormous, and the current situation is that it has not been possible to satisfy the many requests for wood-finished floors.

(Object of the Invention) In view of the above circumstances, the present invention is capable of achieving a sufficient sound insulation effect even when directly attached to a concrete structure, and provides members or measures for mitigating floor impact noise. The purpose is to provide a wood-finished flooring material that does not require.

(Structure of the Invention) The present invention focuses on the fact that sound propagation in concrete buildings occurs as solid-state sound propagation of the concrete structure itself based on impact or vibration caused by this,
The purpose is to block the propagation of sound by absorbing shock or vibration energy, and for this purpose, a spacer member is interposed between the wood-finished decorative board and the back board over the entire periphery, and the spacer member is An air-filled film with a crosslinked viscoelastic body (hereinafter referred to as "F vibration damping rubber sheet") is housed and adhered in a space defined by the members.

42 Higashihashi viscoelastic body is obtained by curing reaction at room temperature between a main ingredient having a telechelic polymer having a terminal hydroxyl group as a basic component and a curing agent having two or more incyanate groups per molecule, The curing reaction is carried out at room temperature, and the product after the curing reaction can maintain its shape even when heated to 800C, and the hardness under the condition of 200C is measured by the C-type hardness tester specified in Japan Rubber Association Standard 5RIS-0101. It satisfies the three-row property of 50 pieces or more.

The air-filled film with a crosslinked viscoelastic material is a film in which the crosslinked viscoelastic material is integrally attached to the recesses or the entire surface of a film base material in which convex parts filled with air and recesses made only of film are alternately provided. It is what it is.

With wood-finished flooring constructed in this way, the vibration-damping rubber sheet layer is restrained by the surface wood-finished decorative board and the backing board, so even if an impact is applied, it will not be affected by the sliding deformation of the cross-linked viscoelastic body. It is possible to increase the damping effect as energy loss. Furthermore, since the air-enclosed portions (convex portions) of the film are easily compressed and deformed, the shear deformation of the crosslinked viscoelastic body upon impact increases, which further improves the impact energy absorption performance. It is.

Therefore, when the above-mentioned flooring material is used directly as an interior material for a concrete building, this rubber sheet layer absorbs and blocks the impact that causes noise and the vibrations generated thereby, and the concrete structure It is possible to prevent the generation of body sound itself and to block the propagation of sound from the upper floor to the lower floor or between adjacent rooms.

In addition, since a spacer member is interposed over the entire peripheral edge between the front and back boards, by applying wood grain processing to the side surface of this spacer member, it is possible to create a state where there is no step between adjacent flooring materials.
8, it can be used as a flooring material that can be laid continuously.

(Embodiment of the invention) The wooden finishing flooring materials 1 shown in the first and second figures are both 303 mm
Between the 1818mm x 3in size decorative plywood 11 with a wood finish on the surface and the regular plywood 12 as the back plate, there is a 25m1 x
By inserting a frame-shaped spacer member 13 having a cross-sectional size of 4 mm with a predetermined ψ (approximately 5 m1) phase shift in the width direction of the flooring material 1, a guard hole portion 13b and an active portion 13C are respectively formed on the opposite side surface. At the same time, a damping rubber sheet 14 is housed and adhered in a space 13a formed between the spacer member 13 and the front and back plates 11φ12, using the front and back plates 11-12 as restraining materials.

As the damping rubber sheet 14, an air-filled film with a crosslinked viscoelastic body is used. The crosslinked viscoelastic material used in the present invention is a material that is liquid at room temperature, and after reacting at room temperature, the cured product retains its shape even when heated to 80"C, and further exhibits hardness at 20°C. It satisfies the three conditions of having a hardness of 50 or more on a C-type hardness tester as shown in Japan Rubber Association Standard 5RIS-0101. In addition, this crosslinked viscoelastic body is obtained by causing a curing reaction at room temperature between a main ingredient consisting of a telechelic polymer having a hydroxyl group at the end and a curing agent having two or more isocyanates per molecule. It is something.

More specifically, the main ingredient is polybutadiene, hydrogenated polybutadiene, polybutadiene-nitrile, polybutadiene-styrene, isoprene, etc., which has a hydroxyl group at the end, and polyether poly-v, polyester polyol, urethane acrylic polyol, aniline derivative. Preferably, a polyol or the like is used alone or in combination.

In addition, as the curing agent, an incyanate-based curing agent is suitable, and it is necessary to have two or more incyanate groups per molecule. Specific examples include toluylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, inphorone diisocyanate, prepolymers having terminal incyanate groups, and these can be used alone or in combination.

Incidentally, it is also possible to obtain a crosslinked viscoelastic body that satisfies the present invention by combining only the essential components of the above-mentioned "reacted at room temperature".

Furthermore, as an air-filled film to which the crosslinked viscoelastic body is attached and integrated, air-filled convex portions 140a and 140a are used as shown in the third figure.
. . . and film-only recesses 140b . . . are alternately provided. As the air-filled film base material 140, a general-purpose product conventionally used as a packaging material (for example, an air cap) is sufficient, but air-filled film convex portions 140a...
Film recess 140b filled with crosslinked viscoelastic body 141
It is desirable that the volume ratio of the convex parts to the concave parts is 2:8 to 8:2.If the convex parts are less than 2:8, the cost of raw materials will increase. On the other hand, if the number of convex portions is greater than the ratio of convex portions to concave portions of 8:2, the cost of raw materials will decrease, but the risk of destruction of the air bag will increase and the restorability will deteriorate. The thickness of the film constituting the air-filled concave portions 140a is preferably about 20 μm to 100 μm, and the height of the convex portions 140b is 6+s■ or less, and the preferred range is 2 μm.
It is m■ to 4■. Convex! The volume of air per piece is 10c
It is desirable that the amount is less than c, and the more preferable range is 0.3 to 5 cc. Further, the crosslinked viscoelastic body 141 to be adhered and integrated may be in a state where it is coated on the convex portion 140b, but considering the cost, it is better to have a thickness of 1II11 or less; If the covering height is less than % of the height of the convex portion, it is not desirable because unless it is compressed from the beginning, the adhesion effect with the restraining material cannot be achieved and adhesive strength is likely to be insufficient.

By using the vibration damping rubber sheet 14 as described above, in the event of an impact, in addition to the impact absorption performance of the viscoelastic body itself, the fill nozzle/convex portion 140a that forms an air bag.
By increasing the deformation of . Also, in terms of compression characteristics,
When subjected to impact, the air bladders of the film convex portions 140a are compressed, and the viscoelastic body 141 is further compressed. Although it easily deforms under very small displacements, it does not withstand compression above a certain load. In this case, the reaction force of the compressed air in the convex air bag and the reaction force of the crosslinked viscoelastic body act, and as a result, a larger force is required to increase the deformation, resulting in more displacement than necessary. can be avoided. Furthermore, it was discovered that when the compressive load is removed, the restoring force of the crosslinked viscoelastic body and the restoring force of the compressed air bladder of the convex part are combined, and a very quick recovery force can be obtained. has been done.

In the wooden finished flooring 1 constructed as described above, the hole portion 13b and the phase portion 13C are formed in advance on the surface of the flooring material 10s due to the phase shift between the spacer member 13 and the front and back plates 11-12. Actual processing can be omitted.

Also, the soundproofing effect of the above embodiment configuration.

The same < JI
SA 1418 rL as specified in “R Sound Class of Buildings”
The results confirmed as "value" are as shown in Figure 5.

That is, it has cleared the L value of 55, which is proposed by the Architectural Institute of Japan as the minimum necessary soundproofing effect for concrete apartment buildings. Is this L value of 55 the child's running feet? The soundproofing level is such that the cost of ¥ etc. is almost not enough.

In addition, when actually constructing the floor, a cushion layer is created between the concrete floor surface and the lower surface of the flooring material by laying leveling material on the concrete floor surface or pasting Fukun 3I lumber on the lower surface of the flooring material. In this way, in addition to the sound insulation performance of the flooring material itself, it also prevents the propagation of the scale through the void layer created between the highly uneven concrete floor surface and the lower surface of the flooring material. This makes it possible to obtain more practical soundproofing effects.
In addition, its pressure resistance properties when heavy objects such as refrigerators and pianos are placed on the floor are as shown in Figure 6, and it has excellent dent recovery performance after the load is removed. It surpasses. Furthermore, since it absorbs impact and vibration energy, when used as flooring material in gymnasiums, it reduces the stress that is applied to human feet during interlocking movement, and can have a positive effect on body tissues. .

(Effects of the Invention) According to the wood-finished flooring material according to the present invention, the vibration-damping rubber sheet layer interposed between the surface wood-finished decorative board and the back board absorbs shocks and vibrations generated thereby. As a result, sound does not propagate across the stiff vibration damping rubber sheet layer.
Even when applied directly to a concrete structure floor as a flooring material, it is possible to obtain a sound insulation effect between the lower floor and adjacent rooms.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the wood-finished flooring material according to the present invention, Fig. 2 is a sectional view taken along the line II-If, and Fig. 3 is a perspective view showing an embodiment of the vibration damping rubber sheet. , FIG. 4 is an enlarged sectional view thereof. Further, FIG. 5 is a graph showing the relationship between the floor impact sound level and the L value of the wooden finished flooring material according to the present invention, and FIG. 6 is a graph showing the pressure resistance characteristics of the wooden finished flooring material according to the present invention. 1... Wooden finish flooring material 11... Surface wood finish decorative board 12... Back plate 13... Spacer member 14... Vibration damping rubber sheet 140... Film base material 140a... Air Enclosing convex portion 140b...Film concave portion 141...Crosslinked viscoelastic body 15...Unevenness adjusting material Patent applicant Sadashige Special Plywood Industry Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 +40 Figure 5 Figure (dB)

Claims (1)

[Scope of Claims] 1) A spacer member is interposed between the surface wood-finish decorative board and the back board over the entire periphery thereof, and the surface wood-finish decorative board and the back board are provided in a space defined by the spacer member. A wood-finished flooring material with excellent vibration damping properties, characterized in that it is constructed by housing and adhering an air-filled film with a cross-linked viscoelastic body as a restraining material to a backing plate. 2) The crosslinked viscoelastic body of the above-mentioned air-filled film with a crosslinked viscoelastic body is formed by combining a main ingredient consisting of a telechelic polymer having a hydroxyl group at the end and a curing agent having two or more isocyanate groups per molecule at room temperature. It is obtained by a curing reaction, and the curing reaction is carried out at room temperature, and the product after the curing reaction can maintain its shape even when heated to 80°C, and its hardness remains unchanged at 20°C. 5 on the C-type hardness tester specified in the Japan Rubber Association standard SRIS-0101.
The wood-finished flooring material according to claim 1, which satisfies the condition of 0 or less. 3) The air-enclosed film of the air-enclosed film with a crosslinked viscoelastic body is a film base material in which convex portions filled with air and concave portions made only of the film are alternately provided, and the crosslinked viscoelastic body is the film base material. The wooden finished flooring material according to claim 1, which is integrally adhered to the recessed portion or the entire surface of the wooden flooring material.