JPH0777783B2 - Damping floor base material - Google Patents

Description

The present invention relates to a floor base material having a vibration damping effect.

[Conventional technology and its problems]

Construction of high-rise apartments has progressed,
There are many troubles caused by vibration noise generated on the floor.

Under such circumstances, measures for suppressing vibration noise generated in individual homes or floors are being investigated from various directions, and one of the means is to add damping function to floor materials. . The underfloor material having these damping functions is plywood in which a damping sheet is interposed between a plurality of wood veneers.

On the other hand, plywood has a water resistance regulation as well as a strength regulation in the Japanese Agricultural Standards (revised December 1985, hereinafter referred to as JAS). The water resistance grade is determined by a three-level immersion peel test.

Note (1) Type I immersion peel test In the type I immersion peel test, the test piece is immersed in boiling water for 4 hours, then dried at a temperature of 60 ° C ± 3 ° C for 20 hours, and then immersed in boiling water for 4 hours. Further, it is dried at a temperature of 60 ° C. ± 3 ° C. for 3 hours.

(2) Type II immersion peel test In the type II immersion peel test, the test piece is immersed in warm water at 70 ° C ± 3 ° C for 2 hours, and then dried at 60 ° C ± 3 ° C for 3 hours.

(3) Type III immersion peel test In the type III immersion peel test, the test piece is immersed in water at 35 ° C ± 3 ° C for 2 hours and then dried at a temperature of 60 ° C ± 3 ° C for 3 hours.

Therefore, the inventors of the present application, in Japanese Patent Application No. 1-303825, interpose a damping sheet between a plurality of wood veneers, and use the damping sheet as a part by weight of butyl rubber, polyisobutylene rubber and a polar group. And a total weight part of the modified polyolefin having a ratio of 60 to 90:40 to 10, and a total weight part 40 to 10 of the modified polyolefin having a polyisobutylene rubber and a polar group, the modified polyolefin having a polar group. Is less than 30 parts by weight and more than 5 parts by weight,
We proposed 60-220 parts by weight of vulcanized granular rubber having an average particle size of 0.8 mm-2.0 mm as 100 parts by weight, and kneading and kneading the mixture to form a sheet-like damping floor base material.

This damping floor base material has good manufacturability because each wooden board is joined by the self-fusing property of the damping sheet, and the damping property is superior to the conventional one due to the presence of granular rubber. Furthermore, the above three types of immersion and peeling tests are also sufficiently satisfactory.

However, nowadays, when more space and time are desired, it is desired to further improve the vibration damping property in order to secure the space.
The vibration damping property is improved by increasing the thickness of the vibration damping sheet, but on the other hand, the front and back wood board materials of the floor base material are displaced due to the weak pressure resistance of the vibration damping sheet. That is, tilt deformation is likely to occur.

The present invention has been made in view of the above points, and an object thereof is to improve the damping property without thickening the damping sheet.

[Means for Solving the Problems]

In order to solve the above problems, in the present invention, in the vibration damping floor base material of the above-mentioned Japanese Patent Application No. 1-303825, a structure in which a particle board is interposed together with a vibration damping sheet in the wood board material of the front and back surfaces. Of.

The meaning of the range of parts by weight of butyl rubber and the like is the same as the invention of Japanese Patent Application No. 1-3083825, but if stated again,
When the butyl rubber is smaller than the above range, the vibration sound (wave) absorption effect cannot be obtained. When it is large, a long-term static load causes tilting deformation (deformation of household goods placed on the corner of the floor due to static load). The butyl rubber may be 30 to 50 parts by weight of raw butyl rubber and 60 to 20 parts by weight of regenerated butyl rubber in a ratio with a modified polyolefin or the like.

When the polyisobutylene rubber is smaller than the above range,
When settling occurs and becomes large, the effect of absorbing vibration sound (wave) cannot be obtained.

The modified polyolefin is an adhesive resin and has an acetoxy group, a hydroxyl group, a carboxyl group, an ester group, etc. represented by the following chemical structural formulas (I) to (IV). There are things.

Dumiran: Mitsui Polychemical Co., Ltd. product name Admer: Mitsui Petrochemical Industry Co., Ltd. product name Takemelt: Takeda Pharmaceutical Co., Ltd. product name UBE BOND M1000: Ube Industries Co., Ltd. product name When this adhesive resin is smaller than the above range, it becomes difficult to pass the JAS first-class immersion peel test. On the other hand, if 20 parts by weight is inserted, a sufficient effect will be obtained, and if it exceeds 30 parts by weight, no further effect will be obtained, which is not economically disadvantageous. Wave) absorption effect decreases.

If the particle size of the vulcanized granular rubber is too small, the vibration sound (wave) dispersion and absorption effects will be reduced. On the other hand, if the particle size is too large, not only is the vibration noise (wave) not well dispersed, but it becomes difficult to form a sheet after kneading. Further, when the compounding amount is small, tilt deformation occurs due to a long-term static load, and the effect of dispersing vibration sound (wave) deteriorates. On the other hand, when the amount is too large, the amount of butyl rubber between particles becomes relatively small, the absorption of vibration sound (wave) becomes poor, and it becomes difficult to form a sheet.

In addition to the structure of the damping sheet according to Japanese Patent Application No. 1-3083,
Calcium bicarbonate as a filler, zinc stearate as a lubricant, lead stearate, powdered stearic acid, paraffin flakes, zinc white as a stabilizer, process oil as a softener, and a colorant may be appropriately selected and added. it can.

[Action]

In the present invention thus configured, the vibration damping property and the sound absorbing property are improved by the sound absorbing property and the vibration absorbing property of the particle board.

〔Example〕

FIG. 1 shows an embodiment, in which the front and back surfaces are formed of a wooden board material 1, and a vibration damping sheet 3 and a particle board 2 are interposed therebetween.

The wood board 1 is a plywood with three layers of Lauan thin plates of 1.0 mm, 1.3 mm, and 1.0 mm, with their structures alternating, and the thickness is 3.
It is 3 mm. The particle board 2 is a well-known one in which shavings are pressure-bonded through a binder and has a thickness of 9,
It is 12 mm. The damping sheet 3 has the kneading composition (a, b, c, d, e, f) shown in Table 1 and has a thickness of 2.0 m.
m and 1.6 mm. That is, wood board 1 (3.3 mm), particle board 2 (9 mm), damping sheet 3 (2.0 mm,
a, b, c, d, e, f6 types) (Example 1),
Wood board 1 (3.3mm), particle board 2 (12m
m) and the damping sheet 3 (1.6 mm, a, b, c, d, e, f6 types) (Example 2) were manufactured.

The manufacturing conditions are that the vibration damping sheet 3 can be bonded to the other members 2 and 1 by the self-bonding property. A known adhesive is used for the adhesion of, and the amount of glue: 32-39 g /
m ² , hot pressure temperature: 125 ° C. to 130 ° C., surface pressure: 8 to 10 kgf / cm ² , hot pressure time: 3.5 to 5 minutes.

In addition, as a comparative example, the construction of only the wood board 1 is 15 mm
We made thick structural plywood.

When the floor impact sound level was measured according to JIS A 1418 in Examples 1 and 2 and Comparative Example, the former obtained an improvement result of 3 to 14 dB as compared with the latter. In particular, there was an improvement effect of 10 to 14 dB at 250 to 2000 Hz, which is a light impact sound in which impact sound is a problem.

In addition, in Examples 1 and 2, structural plywood grade 1 (90 ° direction) was used in accordance with the Japanese agricultural standard test method for structural plywood.
Table 2 shows the results of the bending test and the second-class bending test.

The results show that both examples are satisfactory as structural plywood.

In the embodiment, the particle board 2 is provided between the vibration damping sheets 3 and 3.
Although only the board 2 is interposed, a part of the board 2 may be a layer of the wooden board 1, and at this time, the vibration damping sheet 3 can be provided inside the board 2 and between the board 2 and the wooden board 1.
Also in the embodiment, the vibration damping sheet 3 can be interposed in the particle board 2.

〔The invention's effect〕

Since the present invention uses the particle board as described above, it has an effect of improving the vibration damping property and the sound absorbing property.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an embodiment of a damping floor base material according to the present invention. 1 ... Wood board, 2 ... Particle board, 3 ... Damping sheet.

Front page continued (72) Inventor Jun Nakajima 2-3-1 Iwata-cho, Higashi-Osaka City, Osaka Prefecture Tatsuta Electric Wire Co., Ltd. (72) Inventor Kihachi Onishi 2-3-1 Iwata-cho, Higashi-Osaka City, Osaka Tatsuta Electric Wire Co., Ltd. (72) Minor Aoki Minoru Aoki 8-9-8 Hanabata, Adachi-ku, Tokyo Stock Company Keio (72) Inventor Shunji Suzuki 8-9-8 Hanabata, Adachi-ku, Tokyo Stock Company In Keio (72) Inventor Shin Nishida 8-9-8 Hanabata, Adachi-ku, Tokyo Keio Incorporated (56) Reference JP-A-3-162948 (JP, A)

Claims (2)

[Claims] 1. A wooden board material is arranged on the front and back surfaces, and a damping sheet and a particle board are interposed between the both wooden board materials,
The damping sheet, butyl rubber parts by weight, and polyisobutylene rubber and the modified polyolefin having a polar group in total parts by weight, the ratio is 60 to 90:40 to 10, the polyisobutylene rubber and polar groups are contained. Of the total weight parts 40 to 10 of the modified polyolefin, the amount of the modified polyolefin having a polar group is less than 30 parts by weight and 5 parts by weight or more, and the total amount is 100 parts by weight, and the average particle diameter is 0.8 mm to 2.0 m.
A damping flooring base material characterized in that 60 to 220 parts by weight of m vulcanized granular rubber is added and compounded and kneaded to form a sheet. 2. The damping floor base material according to claim 1, wherein regenerated butyl rubber is included in butyl rubber.