JPH06102322B2 - 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. 2-231989, etc.,
We proposed a vibration damping sheet and a particle board as a core material between the wooden boards.

[0004] This is an advantage from the viewpoint of resource conservation because it uses a damping sheet and particle board to effectively control the vibration and uses a coniferous tree that is easy to plant and grows quickly.

[0005]

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 carried out after each is individually manufactured. Therefore, there is room for improvement in terms of manufacturability.

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

[0007]

In order to solve the above-mentioned problems, according to the present invention, the required number of veneers obtained by continuously slicing a coniferous tree along the circumferential direction of its outer surface is used. The fibers are alternately crossed by 90 degrees, stacked and joined together, and the core material interposed between the front and back plates is
Vulcanized granular rubber, heat-fusible rubber, polyisobutylene, modified polyolefin having polar groups, and wood chips were kneaded in a required amount, and heated and pressed to be integrated.

The above vulcanized granular rubber has an average particle size of 1.0 to 3.0 mm.
60-220 parts by weight, the heat-fusible rubber is butyl rubber 60-90 parts by weight, the polyisobutylene and the modified polyolefin are 7-40 parts by weight in total, and the modified polyolefin is 10 parts by weight or more 30 parts by weight or more. The wood chips may be less than 240 parts by weight, and the wood chips may be 240 to 640 parts by weight. At this time, it is preferable that the vulcanized granular rubbers are mixed in equal amounts having different average particle diameters, the regenerated butyl rubber can be partially used as the butyl rubber, and the heat-fusible rubber and polyisobutylene are modified. 10 total polyolefins
It is recommended to set it to 0 parts by weight.

The modified polyolefin is an adhesive resin having an acetoxy group, a hydroxyl group, a carboxyl group, an ester group and 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.

Dumilan: Trade name of Mitsui Polychemical Co., Ltd. Admer: Trade name of Mitsui Petrochemical Co., Ltd. Takemelt: Trade name of Takeda Pharmaceutical Co., Ltd. UBE BOND: Trade name of Ube Industries Co., Ltd.

[0011]

[Table 1]

As the wood chips, those of the same quality as conventional particle boards for plywood are used.

[0013]

The vibration-damping floor base material according to the present invention having the above-described structure is vulcanized granular rubber, polyisobutylene, and wood chips due to the self-bonding property of the heat-fusible rubber (butyl rubber) and the adhesive property of the modified polyolefin. Form a core material, and the vibration sound (wave) is efficiently dispersed and absorbed by the vulcanized granular rubber dispersed in the core material, the wood chips and the heat-sealable rubber filling the space between them, and polyisobutylene. It

[0014]

EXAMPLE First, as shown in FIG. 5, the front and back plates 1 are 1.0
The single plates 1a, 1b, 1c having a thickness of mm are stacked and adhered to be integrated, and the fibers are alternately crossed by 90 degrees. As shown in FIG. 6, the veneers 1a, 1b, and 1c are slices of a nodeless radiata pine log W, which is internode-shaped, along the circumferential direction of the outer peripheral surface, that is, a so-called "striped".
To form.

On the other hand, as for the core material 3, first, sulfur granular rubber (average particle size 1.0 to 3.0 mm): 60 to 220 parts by weight, butyl rubber (BR): 60 to 90 parts by weight, polyisobutylene and UB.
EBOND: An appropriate amount of 10 to 40 parts by weight is put into a hermetic kneader and sufficiently kneaded, and then wood chips: 240
An appropriate amount of 620 parts by weight is charged in several times and kneaded to produce a core material. At this time, heavy calcium carbonate, processability imparting oil, zinc white No. 3, powdered stearic acid, and paraffin flakes are added in appropriate amounts.

Next, as shown in FIG. 2, the back plate 1 is placed in a mold frame D (thickness: 20 mm, length: 600 mm, width: 300 mm), and an adhesive plastic sheet 2 is interposed on the back plate 1. Put in the core material 3, and as shown in FIG.
Press plate 11 under the conditions of 130 ° C. and 8 to 10 kgf / cm ^2.
It was heated and pressed for 3.5 to 5 minutes. Next, as shown in FIG. 4, the front plate 1 is placed on the core material 3 with the adhesive plastic sheet 2 interposed therebetween, heated and pressed under the same conditions as above, and the vibration damping shown in FIG. Floor base material A was obtained.

The adhesive plastic sheet 2 includes
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. This sheet 2 is the above-mentioned veneer 1
It can also be used for joining a, 1b, and 1c. In this case, they are interposed and heated and pressurized. In the figure, sheet 2
However, in reality, the core resin 3 and the front and back plates 1 and 1 are in a state in which the resin composition does not take shape.

[0018] 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.

[0019]

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.

FIG. 5 is a production explanatory view of the same embodiment.

FIG. 6 is a production explanatory view of the same embodiment.

[Explanation of symbols]

 1 Wood board material 1a, 1b, 1c Single board 2 Adhesive plastic sheet 3 Core material (core material) A Damping floor base material D Mold frame

Claims (2)

[Claims] 1. A floor base material comprising plywood in which a front plate and a back plate are bonded and integrated to the front and back faces of a core material, wherein the front plate and the back plate continuously slice softwood along the circumferential direction of the outer peripheral surface thereof. The above-mentioned core material is obtained by alternately crossing the fibers at 90 degrees and stacking and joining them, and the core material is vulcanized granular rubber, heat-fusible rubber, polyisobutylene,
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 60 to 90 parts by weight using butyl rubber, the polyisobutylene and the modified polyolefin are 10 to 40 parts by weight in total, and the modified polyolefin is 7 parts by weight or more. The damping floor base material according to claim 1, wherein the wood chips are less than 30 parts by weight and the wood chips are 240 to 640 parts by weight.