JP2543787B2 - Damping floor base material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor base material having a vibration damping effect.

[0002]

2. Description of the Related Art High-rise and high-rise apartments are actively being built, and in such a situation, troubles due to vibration noise in neighboring households are occurring.

As a floor base material for solving these problems,
The applicant of the present application, in Japanese Patent Application No. 2-231983, etc.,
We proposed that a vibration damping sheet and a particle board are interposed and integrated between the wood veneers.

[0004]

However, since the core material of the vibration damping floor base material is different from the vibration damping sheet and the particle board, the above-mentioned integration is performed after each is individually manufactured. Therefore, there is room for improvement in terms of manufacturability.

In view of the above points, it is an object of the present invention to make the core material not a separate vibration damping sheet and particle board but an integrated one having both damping functions.

[0006]

In order to solve the above-mentioned problems, in the present invention, the core material interposed between the wood veneers is made of vulcanized granular rubber, heat-fusible rubber, polyethylene, polar. The required amounts of the modified polyolefin having a base and the wood chips are kneaded and heated and pressed to be integrated.

The vulcanized granular rubber has an average particle size of 1.0 to 3.0 mm.
As 60 to 220 parts by weight, the heat-fusible rubber is 60 to 90 parts by weight using butyl rubber, and the polyethylene and the modified polyolefin are 10 to 40 parts by weight in total, and the modified polyolefin is 10 to 30 parts by weight. Less than a part,
The wood chips may be 240 to 640 parts by weight.
At this time, it is preferable that the vulcanized granular rubbers having different average particle diameters are blended in equal amounts, and the butyl rubber may be a part of the recycled butyl rubber, and the heat-fusible rubber, polyethylene, and modified polyolefin may be used. It is recommended that the total of 100 parts by weight be 100 parts by weight.

The modified polyolefin is an adhesive resin having an acetoxy group, a hydroxyl group, a carboxyl group, an ester group or the like represented by the chemical structural formulas (I) to (IV) shown in Table 1 below, and is commercially available. Some of the brands are listed below.

Dumiran: Mitsui Polychemical Co., Ltd. product name Admer: Mitsui Petrochemical Industry Co., Ltd. product name Takemelt: Takeda Pharmaceutical Co., Ltd. product name UBE BOND: Ube Industries, Ltd. product name

[0010]

[Table 1]

The wood chips used are of the same quality as conventional particle boards for plywood.

[0012]

The vibration-damping floor base material according to the present invention having the above-described structure has the following properties: vulcanized granular rubber, polyethylene, and wood chips due to the self-bonding property of the heat-bonding rubber (butyl rubber) and the adhesive property of the modified polyolefin. Together, they make the heart,
The vibrating sound (wave) is efficiently dispersed and absorbed by the vulcanized granular rubber dispersed in the core material, the wood chips and the heat-fusible rubber filling the space between them, and polyethylene (PE).

[0013]

Example First, vulcanized granular rubber (average particle size 1.0 to 3.0 m
m): 60 to 220 parts by weight, butyl rubber (BR): 60
~ 90 parts by weight, PE and UBE BOND: 10 to 40 parts by weight are put into a kneading machine and kneaded sufficiently.
Then, an appropriate amount of wood chips (240 to 620 parts by weight) is charged in several times and kneaded to prepare a core material. At this time, heavy calcium carbonate, processability imparting oil, zinc flower 3
No., powdered stearic acid, and paraffin flakes are added in appropriate amounts.

Next, as shown in FIG. 2, 3.3 mm is first placed in a mold frame D (thickness 20 mm, length 600 mm, width 300 mm).
The wood veneer 1 is placed, and the core material 3 is put thereinto with the adhesive plastic sheet 2 interposed therebetween, and as shown in FIG. 3, the conditions are 125 ° C. to 130 ° C. and 8 to 10 kgf / cm ² . Then, it was heated and pressed by the press plate 11 for 3.5 to 5 minutes. Next, as shown in FIG. 4, a wood veneer (3.3 mm thick) 1 is placed on the core material 3 with an adhesive plastic sheet 2 interposed therebetween, and heated and pressed under the same conditions as above. A damping floor base material A shown in FIG. 1 was obtained.

The adhesive plastic sheet 2 has
For 100 parts by weight of low density polyethylene (LDPE),
A product obtained by adding 7 parts by weight or more of a modified polyolefin having a polar group was used. Although this sheet 2 is clearly shown in the figure, in reality, the core resin 3 and the wood veneers 1 and 1 are in a state in which the resin composition thereof is not formed.

For this damping floor base material A, JIS A1
418 lightweight impact sound test (250-2000Hz)
As a result, an improvement of 12 to 18 dB was recognized.

[0017]

According to the present invention, as constructed above, the core material is integrated into one having both the damping function of the damping sheet and the damping function of the particle board. There is no need for integrated work, and productivity is improved.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an embodiment.

FIG. 2 is a production explanatory view of the same embodiment.

FIG. 3 is a production explanatory view of the same embodiment.

FIG. 4 is a production explanatory view of the same embodiment.

[Explanation of symbols]

 1 Wood veneer 2 Adhesive plastic sheet 3 Core material (core material) A Damping floor base material D Mold frame

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B32B 25/02 B32B 25/02 E04F 15/02 8702-2E E04F 15/02 T 15/18 8702- 2E 15/18 J

Claims (2)

(57) [Claims] 1. A floor base material comprising a plywood in which a front plate and a back plate of wood veneer are bonded and integrated on the front and back surfaces of a core material, wherein the core material is vulcanized granular rubber, heat-fusible rubber, polyethylene,
A damping floor base material, which is obtained by kneading a required amount of a modified polyolefin having a polar group and a wood chip, and heating and pressurizing them into an integrated body. 2. The vulcanized granular rubber has an average particle size of 1.0 to 3.0.
mm is 60 to 220 parts by weight, the heat-fusible rubber is butyl rubber in 60 to 90 parts by weight, the polyethylene and the modified polyolefin are 10 to 40 parts by weight in total, and the modified polyolefin is 10 to 30 parts by weight or more. The damping floor base material according to claim 1, wherein the wood chips are less than 240 parts by weight and the wood chips are 240 to 640 parts by weight.