JPH04339601A - Ground material of vibration damping floor - Google Patents

Abstract

PURPOSE:To improve productivity without lowering of vibration damping property in the ground material of a vibration damping floor which effects vibration damping action by a vibration damping sheet and a particle board. CONSTITUTION:Front and rear sheets is composed of, the necessary number of veneers in which a needle-leaf tree sliced continuously along the peripheral direction of its outer peripheral surface are super-imposed with their fibers being crossed alternately by every 90 deg., the core material 3 is integrally bonded between said front and rear sheets 1, 1 by kneading, heating and pressurizing necessary amount of each of vulcanized powder rubber, thermal adhesive rubber, polyisobutylene, the modified polyolefin with polar radical. Said core material has both vibration damping performans of a vibration damping sheet and a particle board.

Description

[Detailed description of the invention]

0001

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

0002

BACKGROUND OF THE INVENTION High-rise and apartment buildings are being constructed rapidly, and troubles caused by vibration noise in neighboring homes are occurring one after another.

[0003] As a flooring material that solves these problems,
The applicant of this application, in Japanese Patent Application No. 2-231989, etc.
We proposed a structure in which a damping sheet and particle board are interposed as a core material between wooden boards.

[0004] This product has an effective damping effect due to the damping sheet and particle board, and is also advantageous in terms of resource conservation because it uses coniferous trees that are easy to plant and grow quickly.

[0005]

[Problems to be Solved by the Invention] However, since the damping sheet and the particle board are different core materials for the vibration-damping floor base material, they have been manufactured separately and then integrated. Therefore, there is room for improvement in terms of manufacturability.

[0006] In view of the above points, it is an object of the present invention to provide a core material that is not separate from the vibration damping sheet and the particle board, but instead is made into an integrated core material that has the vibration damping functions of both.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, the front and back boards are made by cutting the required number of veneers made by continuously slicing coniferous wood along the circumferential direction of the outer circumferential surface of the front and back boards. The fibers are alternately crossed at 90 degrees and stacked and bonded, and the core material interposed between the front and back plates is
Required amounts of vulcanized granular rubber, heat-fusible rubber, polyisobutylene, modified polyolefin having a polar group, and wood chips were kneaded and heated and pressurized to form an integrated product.

The above-mentioned vulcanized granular rubber has an average particle size of 1.0 to 3.
60 to 220 parts by weight as 0 mm, 60 to 90 parts by weight of butyl rubber as the heat-fusible rubber, 7 to 40 parts by weight of the polyisobutylene and modified polyolefin in total, and 10 parts by weight or more of the modified polyolefin. The amount of wood chips is preferably less than 30 parts by weight, and the amount of the wood chips is preferably 240 to 640 parts by weight. At this time, it is preferable to mix equal amounts of vulcanized granular rubber with different average particle sizes, and recycled butyl rubber can be used in part for the butyl rubber, and heat-fusible rubber and polyisobutylene, modified The total amount of polyolefin may be 100 parts by weight.

Modified polyolefins are adhesive resins having acetoxy groups, hydroxyl groups, carboxyl groups, ester groups, etc. represented by chemical structural formulas (I) to (IV) shown in Table 1 below, and are commercially available. Some of the brands listed include:

Dumilan: Made by Mitsui Polychemical Co., Ltd. Product name Admer: Made by Mitsui Petrochemical Industries Co., Ltd. Product name Takemelt: Made by Takeda Pharmaceutical Co., Ltd. Product name UBE BOND
:Product name manufactured by Ube Industries Co., Ltd.

[0011]

[Table 1]

[0012] The wood chips used are of the same quality as conventional particle boards for plywood.

[0013]

[Function] The vibration-damping flooring material according to the present invention configured as described above has the self-bonding properties of the heat-fusible rubber (butyl rubber) and the adhesive properties of the modified polyolefin, so that it can be used in vulcanized granular rubber, polyisobutylene, wood chips, etc. Together, they form the core material, and vibrational sound (waves) is efficiently dispersed and absorbed by the vulcanized granular rubber dispersed in the core material, the wood chips, and the heat-fusible rubber and polyisobutylene that fill in the space between them. Ru.

[0014]

[Embodiment] First, as shown in FIG.
It is made by stacking and gluing 0mm thick veneers 1a, 1b, and 1c into one piece, and the fibers are made to intersect alternately at 90 degrees. As shown in FIG. 6, the veneers 1a, 1b, and 1c are formed by slicing a knotless radiata pine log W from which internodes have been harvested along the circumferential direction of the outer circumferential surface, so-called "cutting".

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

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 thereon. Add core material 3, and as shown in Figure 3, 12
Under conditions of 5°C to 130°C and 8 to 10 kgf/cm2,
Heat and pressure was applied using a press plate 11 for 3.5 to 5 minutes. Next, as shown in FIG. 4, a top plate 1 is placed on top of the core material 3 with an adhesive plastic sheet 2 interposed therebetween, and heated and pressurized under the same conditions as above, to suppress vibration as shown in FIG. Flooring material A was obtained.

Note that the adhesive plastic sheet 2 includes:
For 100 parts by weight of low density polyethylene (LDPE),
A polyolefin containing 7 parts by weight or more of a modified polyolefin having a polar group was used. This sheet 2 is the veneer 1 mentioned above.
It can also be used for joining a, 1b, and 1c. In this case, heat and pressure are applied between them. In the figure, sheet 2
is clearly shown, but in reality, the core material 3 and front and back plates 1
, 1, the composition resin enters into it and it becomes shapeless.

[0018] For this vibration damping floor base material A, JIS A
Light impact sound test according to 1418 (250-2000Hz
), an improvement of 12 to 18 dB was observed.

[0019]

[Effects of the Invention] The present invention is constructed as described above, and the core material is made into an integral piece that has both the vibration damping functions of a vibration damping sheet and a particle board. This eliminates the need for integrated work, improving productivity.

[Brief explanation of drawings]

[Fig. 1] Partial perspective view of one embodiment

[Figure 2] Manufacturing explanatory diagram of the same example

[Figure 3] Manufacturing explanatory diagram of the same example

[Figure 4] Manufacturing explanatory diagram of the same example

[Figure 5] Manufacturing explanatory diagram of the same example

[Figure 6] Manufacturing explanatory diagram of the same example

[Explanation of symbols]

1 Wooden board material 1a, 1b, 1c veneer 2 Adhesive plastic sheet 3 Heartwood (heart material) A. Vibration damping flooring material D　Mold frame

Claims (2)

[Claims] 1. A flooring material made of plywood in which a top plate and a back plate are integrally bonded to the front and back surfaces of a core material, wherein the top plate and the back plate are made by continuously slicing coniferous wood along the circumferential direction of its outer circumferential surface. The required number of veneers are stacked and bonded with their fibers intersecting alternately at 90 degrees, and the core material is made of vulcanized granular rubber, heat-fusible rubber, polyisobutylene, or modified polyolefin having a polar group. A vibration-damping floor base material, characterized in that it is made by kneading the required amounts of wood chips and heat-pressing them into one piece. Claim 2: The vulcanized granular rubber has an average particle size of 1.0 to
60 to 220 parts by weight as 3.0 mm, 60 to 90 parts by weight using butyl rubber as the heat-fusible rubber, and a total of 10 to 40 parts by weight of the polyisobutylene and modified polyolefin.
The internally modified polyolefin is 7 parts by weight or more 30 parts by weight
2. The vibration-damping flooring material according to claim 1, wherein the amount of the wood chips is less than 240 to 640 parts by weight.