JPH0381451A - Damping floor backing member - Google Patents

Abstract

PURPOSE:To enhance damping effect by interposing damping sheets which have vulcanized granular rubber bound with self-weldable rubber plastics, into at least one space between stacks laminated with wooden veneers consisting of a plywood, and thereby letting said sheets be self-welded. CONSTITUTION:Damping sheets 3 and 3 which have vulcanized granular rubber 1.0 to 2.0mm in average grain size bound with self-weldable rubber plastics, are interposed into at least one space between the stacks of plywoods 2 and 2 wherein a plurality of wooden veneers 1 and 1 is integrated into one body so that they are thereby self-welded. Each damping sheet 3 and 3 is formed in such a way that 60 to 90 parts of butyl rubber by weight are firstly added to 10 to 40 parts of low density polyethylene by weight in order to make 100 parts of compound by weight in total, and 60 to 220 parts of vulcanized granular rubber by weight are secondary added at specified rates respectively. In this case, vulcanized granular rubber 1.0 to 1.5mm in specified average grain size shall be equivalently, if desirable, blended with the same granular rubber 1.6 to 2.0mm in specified average gain size.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a subfloor material having a vibration damping effect.

[Conventional technology]

High-rise residential buildings and apartment complexes are being constructed rapidly, and troubles caused by vibrating tables in neighboring homes are occurring one after another.

A subfloor material that attempts to solve these problems is one in which wood planks and vibration damping sheets are alternately laminated, with the top and bottom layers made of wood planks.

The damping sheet of this product is made of a rubber sheet, a foamed plastic sheet, and felt made by interlacing metal fibers, plastic fibers, animal fibers, and the like.

[Problems to be solved by the invention]

However, the flooring materials made of the various vibration damping sheets mentioned above are not widely used for boat fishing due to reasons such as not being able to obtain sufficient damping effects or being expensive even if they are obtained. It is.

Therefore, in view of the above-mentioned situation, the present invention aims to provide a flooring material that is inexpensive and has a large vibration damping effect.

[Means to solve the problem]

In order to solve the above problems, in the present invention, between at least one stack of plywood made by stacking and bonding a plurality of wooden veneers together so that their fibers intersect,
It has a structure in which vulcanized granular rubber with an average particle size ai of 0 to 2.0 m is self-fused with a vibration damping sheet interposed therebetween, which is made by binding vulcanized granular rubber with self-fusible rubber plastic.

The above vibration damping sheet has a total amount of 60-90 butyl rubber heavy plate part and 10-40 parts by weight of low density polyethylene x0011
ilf part, and add 60 to 220 vulcanized granular rubber with an average particle size of 1.0 to 2.0 m! It is possible to add the most part.

The above-mentioned vulcanized granular rubber preferably has 130 to 150 overlapping parts, and preferably has average particle diameters of 1.0=-1.5 crucian carp and 1°6 to 2.0 crocodile mixed in equal positions.

The above butyl rubber is preferably 30 to 50 parts by weight, and may include 20 to 60 parts by weight, preferably 30 to 50 parts by weight of recycled butyl rubber.

Furthermore, stabilizers such as powdered stearic acid and zinc stearate, processing aids such as paraffin flakes and processability imparting oil, and fillers may be added to the vibration damping sheet as necessary.

In addition, in the formulation of the vibration damping sheet, if the amount of butyl rubber, recycled butyl rubber and low density polyethylene (LDPE) is less than the above-mentioned type, the binding of the vulcanized granular rubber will be poor and the adhesive force at the laminated interface will be reduced. Also, if the amount increases, the slope deformation due to long-term loads will become loud (and will not be usable).

In addition, the reason why the particle size of the vulcanized granular rubber is made into two types within the above range is to fill the grain boundaries in a preferable state, so that impact sound (impact vibration) can be dispersed and propagated within itself and efficiently. This is for absorption. In addition, if the particle size is large, the binding will be poor and collapse will occur.If the particle size is small, the dispersion propagation and absorption effect will decrease.

If the amount of vulcanized granular rubber is large, the binding will be poor. When it is small, vibration absorption effects and deformation due to long-term loads become problems.

Furthermore, bolybdenum, liquid chlorobrene, etc. can be added to improve the adhesiveness and adhesiveness when interposing the vibration damping sheet on the plywood.

[Effect]

The vibration-damping flooring material constructed as described above is made by fusion bonding of vibration-damping rubber.
Each veneer is bonded by adhesiveness, and the impact sound (impact vibration) applied to the floor is absorbed by the vibration damping sheet. Also,
The vulcanized granular rubber withstands long-term loads applied to the floor surface and prevents the floor from tilting deformation.

More specifically, by filling the grain boundaries of large and small diameter vulcanized rubber in a favorable manner and binding them with butyl rubber and low-density polyethylene, impact sound (impact vibration) is dispersed and propagated within itself. while being absorbed.

〔Example〕

First, flooring materials with various structures were manufactured as shown in Figures 01 (a) to (b). Figures (a) to (C) are according to the present invention, and are released from wooden veneer 1, plywood 2, and vibration damping sheet 3. (a) shows veneer 1: 1.5 m thick, plywood 2
: 5.5111! , vibration damping sheet 3: 2.0m1L
(b) Mori, plywood 2: 5, Sm1L damping sea) 3
: 2, Om [, (e) is single plate 1: 3 ml
L plywood 2: 4m1L vibration damping sheet 3: 1.5m thick. In addition, (d) is entirely made of plywood 2 and has a thickness of 12 m.

The flooring material constructed in this way was treated with vibration damping sheet 1-3C having the kneading composition shown in Table 1, and comparative example (e)
, (f), and produced damping rubber having the composition shown in the same table. The manufacturing conditions are that there is no adhesive in the intervening part of the damping sheet;
For adhesion of wood (veneer 1, plywood 2), use a known adhesive.
Equipment 832~39kgf/cd, heat pressure temperature: 125℃~
130℃ surface pressure crab 8-10kgf/d, heat pressure time: 3.
5 to 5 minutes.

Vibration damping sheet 3 according to Examples (a) to (C) with compositions shown in Table 1
No deformation occurred even under a load of 100 kg on a surface measuring 30 x 90 cm for more than one month. When a load of iokg was applied to the base material for one month using a pressing surface with a radius of 90 cm and a depth of 301 cm, the vibration damping sheet 3 became sagging and the entire base shrine was deformed in an inclined manner.

In addition, in the sheet of Comparative Example (f), the binding of the vulcanized granular rubber is insufficient, and the granular rubber tends to fall off when bending is applied, so it is considered difficult to use the sheet for a long period of time.

Next, move it to the mount shown in Figure 2 (a) (large drawing: 105x2
A 10 x 2,680 carp, joist: 45 x 45 x 1,730 pieces was manufactured, and this was fitted into the blank mounting hole of the measurement chamber, and putty was embedded around its periphery.As shown in the same figure (b),
The flooring materials a, b, c, and flooring material d of the example were placed on the frame A''2.

The floor impact threat level of this test specimen was measured at Kakaba (not shown in Figure 3), based on JIS A 141B-1978 (method for measuring floor impact levels at building sites), and by Nihon Kenkyu. It was conducted at the General Testing Laboratory. The receiving room is
It was a 134-bore reverberation room. The replacement point is shown in Figure 4.

Based on the measurement results, Table 2 shows the modified St of other subfloor materials a, b, and G with respect to the subfloor material d (plywood only).

From this observation, it can be understood that the example has an effective damping effect.

〔effect〕

As explained above (according to the present invention, by using vulcanized granular rubber as the main damping material and using self-adhesive rubber plastic as the adhesive, it is possible to achieve a high vibration damping effect at low cost). A floor base material can be obtained. Also, by using vulcanized granular rubber and using an appropriate amount of binder, there will be no slope deformation due to long-term loads.

[Brief explanation of drawings]

Figure 1 (2) is a partial perspective view showing each m configuration of the subfloor material, Figure 2 (a), 0)), Figure 3, and Figure 3 are perspective views for explaining the test, and schematic diagrams. This is a diagram of replacement points. 1... Wood veneer, 2... Plywood,
3... Vibration damping sheet, a, 1), c, d... Floor base material, A...
- Frame.

Claims (4)

[Claims] (1) Vulcanized granular rubber with an average particle size of 1.0 to 2.0 mm is self-fused between at least one stack of plywood made by stacking and bonding a plurality of wood veneers with their fibers intersecting. A vibration-damping flooring material characterized by having a vibration-damping sheet bound with adhesive rubber plastic interposed and self-fused. (2) In the vibration-damping flooring material according to claim (1), the vibration-damping sheet contains 60 to 90 parts by weight of butyl rubber and 10 to 40 parts by weight of low-density polyethylene in a total amount of 100 parts by weight, and A vibration-damping flooring material comprising 60 to 220 parts by weight of vulcanized granular rubber having an average particle diameter of 1.0 to 2.0 mm. (3) In the damping floor base material according to claim (1) or 2, the average particle diameter is 1.0 to 1.5 mm and 1.6 to 2.0 m.
A vibration-damping flooring material characterized by containing equal amounts of vulcanized granular rubber of m. (4) The vibration damping floor base material according to claim 2 or (3), characterized in that the damping floor base material contains recycled butyl rubber in the butyl rubber.