JPH0324763Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to sound insulating flooring materials, and more specifically, it is suitable for use in the upper floor structure of concrete apartment complexes, and is a sound insulating material that blocks floor impact sounds such as the sound of children jumping. Regarding flooring. Vibrations and noise generated by adults and children walking on floors, children jumping, moving furniture, etc. in concrete apartment complexes, i.e. solid-borne sound (floor impact noise), are difficult for residents to bear in residential environments. It has become a social problem as it causes discomfort and can damage interpersonal relationships in the neighborhood, and its improvement has become an important and urgent issue in the field of housing construction technology. [Conventional technology] Countermeasures for this problem include increasing the thickness of the concrete slab, using a wet floating floor method in which a cushioning material such as glass wool or rock wool is laid on the concrete slab, and then mortar and concrete are applied on top of it. Dry floor construction methods, in which plywood is placed on top of support legs with anti-vibration rubber, or hard plastic foam is laid on top of concrete slabs, etc., have been adopted. [Problems that the invention aims to solve] However, the above method of increasing the thickness of the concrete slab increases the total weight of the building frame, and increases material and construction costs from the stage of pouring the foundation to maintain strength. In addition, when used as a floor as is, it gives people the feeling of a hard floor or a cold floor, and has the disadvantage of causing problems in walking safety, heat retention, and insulation. In addition, the wet floating floor construction method cannot be expected to be effective unless the concrete slab and floating floor are completely isolated, and the disadvantage is that construction is extremely difficult.As with the method of increasing the thickness of the concrete slab itself, the floor surface Since it is made of concrete, it has the disadvantage of not being a comfortable living space. On the other hand, with the dry floating floor having the above structure, floor construction can be done easily and the construction period can be shortened, and although it is effective in preventing the propagation of lightweight impact sound, it is also effective in preventing the propagation of light impact sound. The drawback is that it has little effect on preventing sound propagation. Similarly, methods such as laying hard plastic foam on a concrete slab have little effect on preventing the propagation of weight impact sound. [Means for solving the problems] The present invention solves the above problems, effectively blocks solid-borne sound without increasing the thickness of the concrete slab, and improves walking safety, heat retention, and insulation. The total amount of curable resin and curing agent used as necessary is used as a sound insulating floor material that exhibits the same effect in floating floor systems that maintain a comfortable living space.
A glass fiber composite resin layer consisting of a basic composition of 100 parts by weight, 100 to 300 parts by weight of a damping filler, and 10 to 200 parts by weight of a glass fiber reinforcing material is integrally laminated on at least one side of the core material. To provide sound insulating flooring materials consisting of: Fiberglass reinforced plastic (FRP) board is
The sound insulation effect is achieved by reducing the bending stiffness and making the coincidence limit frequency as high as possible, as well as increasing the mass per unit area, that is, increasing the areal density and increasing the vibration transmission loss. However, this coincidence effect and the mass law alone can reduce the vibration loss in the high frequency range for solid-borne sound in apartment buildings, especially weight impact sound, but the low Almost no vibration loss is observed in the frequency range (63-125Hz). It is said that this loss of vibration in the low frequency range is related to internal loss, but the inventor of the present invention achieved Internal loss due to vibration occurs, resulting in a large loss of vibration in the low frequency range.Using this property, FRP can be used as a flooring material in addition to its inherent high strength, making it suitable as a flooring material. The present invention was completed based on the discovery that the problems described in the prior art described above can be solved by providing the vibration damping function to the vibration damping function. As the thermosetting resin used for the glass fiber composite resin layer, phenol resin, polyester resin, epoxy resin, etc. are suitable, and they can be used in solid, liquid or varnish form. The vibration damping filler blended into the glass fiber composite resin layer generally has a particle size of 0.1 to 100 μm, preferably 0.5 μm.
It consists of particles of metal or its oxide with a diameter of ~50 μm, more preferably 1-50 μm. The type of metal or its oxide is not particularly limited, and iron, lead, zinc, etc., and oxides thereof can be used, but iron oxides are particularly preferably used, such as ferrite, magnetite, etc. , hematite, limonate, iron sand, etc., or mill scale generated from a forged product whose main composition is red iron oxide or triiron tetroxide. However, crystalline metal or metal oxide particles are preferable because they tend to cause a shearing phenomenon with the resin and are excellent in terms of internal vibration loss. It is preferable that each individual particle of the vibration damping filler exists independently in the thermosetting resin, and the particles are uniformly mixed and dispersed until the entire surface thereof has an interface with the thermosetting resin. If the particle size of the vibration damping filler is larger than 100 μm, the weight per particle becomes too large and homogeneous mixing and dispersion cannot be achieved, and if the particle size is less than 0.1 μm, it is difficult to obtain in reality. Such a vibration damping filler has a total amount of the thermosetting resin and its curing agent used as necessary.
It is used in an amount of 100 to 300 parts by weight per 100 parts by weight. If it is less than 100 parts by weight, it will not be able to absorb vibrations in the low frequency range sufficiently, and if it is more than 300 parts by weight,
The wettability with the thermosetting resin deteriorates, a gap is generated at the interface between the vibration damping filler particles and the thermosetting resin, and internal loss of vibration is no longer recognized. The material and performance of the glass fiber reinforced material are not particularly limited, and those used in general FRP can be used. Its usage is
The amount is 10 to 200 parts by weight per 100 parts by weight of the thermosetting resin. If it is less than 10 parts by weight, the strength of the floor structure will be insufficient, and if it is more than 100 parts by weight, the wettability with the thermosetting resin will deteriorate, making it impossible to obtain a good glass fiber composite resin layer. The above-mentioned object of the present invention is basically achieved by adding a damping filler to the glass fiber composite resin layer as described above, but for manufacturing reasons or structural problems of the glass fiber composite resin layer, In order to satisfy the characteristics required for flooring materials to prevent warping and sagging, the glass fiber composite resin layer is laminated and integrated with the core material. The glass fiber composite resin layer containing a vibration damping filler is provided on at least one side of the core material, but it may be provided on both sides. Such core materials include plywood, foamed plastic boards (urethane foam board, acrylic foam board, styrene foam board, styrene-polyethylene-graft foam board, phenol foam board, etc.), and wood-based boards (particle board, insulator board, etc.). rayon board, hardboard, etc.) or asbestos cement board, but there are no particular limitations, and various properties can be imparted to the flooring material depending on the properties. The thickness of this sound insulating floor material is not particularly limited, but it is generally within the range of 10 to 50 mm, and the thickness of the glass fiber resin layer containing the vibration damping filler is within the range of 5 to 30 mm. , the thickness of the core material is 5 to 20
Generally, it is within the mm range. Although the thickness of the core material has no effect on vibration damping, there is a philosophy in the construction industry to lower the overall thickness in order to increase the height of living rooms in high-rise housing, so it is better to make the core material 5 to 20 mm thick as a floor material. The product value can be maintained. Further, in the sound insulation flooring material of this invention, it is preferable that the density of the glass fiber composite resin layer of the sound insulation flooring material is 1.0 to 3.0 g/cm ³ . When it is smaller than 1.0 g/cm ³ , the internal loss of vibration tends to be small, and when it is larger than 3.0 g/cm ³ , the wettability with the resin decreases, and at the same time, the internal loss of vibration tends to decrease. The manufacturing method of this sound insulating flooring material is not particularly limited, but can be carried out by the hand wrap method, the multi-metal die method, the resin injection method, the pultrusion method, etc. Among these methods, manufacturing using polyester resin as a base material is possible. As an example of the method, the production method by hand wrap will be briefly described below. A core material is installed in a pre-made wooden mold (e.g. 3 shaku x 6 shaku), and while glass mat (e.g. chopped strand mat) is laminated on top of it, vibration damping filler such as crystalline iron oxide is added. is impregnated with the resin that has been uniformly mixed in advance while defoaming with a hand roller.
Repeat this method for each glass mat.
When glass fiber resin layers are provided on both sides of the core material, the resin layers are laminated and integrated on one side of the core material, and then the core material is turned over and the resin layers are laminated and integrated again. In the case of self-hardening, the amount of curing agent depends on the type of curing agent, but workability is good when the amount of curing agent is 1 to 2% based on the resin. Note that the curing agent is methyl ethyl ketone, peroxide, or the like. The glass fiber is chopped strand pine treated with silane (300g/m ² - 600g/m ² )
Or using roving cross mats. The above is the manufacturing method for manufacturing by the hand drawn method, but for mass production, the multi-metal die method or pultrusion method is optimal. It goes without saying that other additives such as calcium carbonate, hydrated alumina, and clay may be added to the glass fiber composite resin layer as required. The sound insulating flooring material according to this invention can be suitably used as a sound insulating flooring material having a floating floor structure. [Function] Conventional FRP itself has a transmission loss of vibration in the high frequency range due to the balance between its surface density and bending rigidity, but it has almost no internal loss (damping effect on vibration) and has no effect at all in the area of low frequency vibration. It cannot be attenuated. Only when the three functions of surface density, balance of bending rigidity, and internal loss are satisfied can a material be used as a flooring material in an apartment complex to effectively block solid-borne sound. The present invention involves uniformly mixing and dispersing vibration damping filler particles in a resin with viscoelastic properties, so that each particle exists finely and independently in the resin and forms an interface with the resin on the particle surface. do. In this way, when vibration occurs, the vibration-damping filler particles, which are finely and independently dispersed, shift (slip) at the interface with the viscoelastic resin.
It is believed that the internal loss of vibration is achieved by this phenomenon. This phenomenon of shearing of the damping filler particles inside the resin causes low-frequency vibration noise (solid-borne sound) that occurs on the floors of apartment complexes.
It is thought that it has the effect of significantly attenuating the [Example] Fig. 1 shows an example of the sound insulating flooring material according to the present invention.
In the figure, core material 1 is plywood with a thickness of 12 mm;
The glass fiber composite resin layers 2 and 3, which are integrally laminated on both the upper and lower surfaces, are made of 100 parts by weight of polyester resin and its curing agent (methyl ethyl ketone peroxide).
The basic composition is 1 part by weight, 200 parts by weight of crystalline iron oxide (particle size 10 μm), and 100 parts by weight of glass fiber reinforcement material (chopped strand glass mat), and is laminated on the core material by the manufacturing method described above. It is integrated. The thickness of each of the glass fiber composite resin layers 2 and 3 is 5 mm. Using this sound insulating floor material 11, a floating floor structure as shown in FIG. 2 was assembled. In the same figure, 12 is 130mm thick
13 is a cushion rubber with a hardness of 80°, 14 is a column, and 15 is a concrete panel plywood (scrap board) with a thickness of 12 mm. The floor impact sound isolation characteristics of this floating floor structure were measured in accordance with JIS A-1418. The results are shown in Table 1.

[Table] A floating floor structure similar to the above was assembled using 25 mm thick plywood (particle board) in place of the sound insulating flooring materials 11, 1, 2, and 3 shown in Figure 1, and the floor impact sound isolation characteristics were obtained in the same manner as above. was measured. The results are shown in Table 2.

[Effect of idea]

The sound insulation flooring material according to the present invention is made by laminating an FRP layer containing a damping filler on at least one side of the core material, and prevents weight impact sound from propagating downstairs without increasing the thickness of the concrete slab. be able to. Moreover, it provides a comfortable living space with excellent walking safety, heat retention, and insulation properties of the dry floating floor structure.

[Brief explanation of drawings]

Figure 1 is a perspective view of the sound insulating flooring material according to the present invention;
The figure is a schematic cross-sectional view of a floating floor structure assembled using the sound-insulating flooring material of FIG. 1. 1... Core material, 2, 3... Glass fiber composite resin layer containing vibration damping filler, 11... Sound insulation flooring material, 12...
Concrete slab, 13...Cushion rubber,
14... Support column, 15... Concrete panel plywood (scrap board).

Claims (1)

[Claims for Utility Model Registration] 1. 100 parts by weight of the total amount of the thermosetting resin and the hardening agent used as necessary, 100 to 100 parts of the vibration damping filler.
1. A sound insulating flooring material comprising a glass fiber composite resin layer having a basic composition of 300 parts by weight and 10 to 200 parts by weight of a glass fiber reinforcing material, which is integrally laminated on at least one side of a core material. 2. The sound insulating flooring material according to claim 1, wherein the thermosetting resin is a phenolic resin, a polyester resin, or an epoxy resin. 3. The sound insulating flooring material according to claim 1 or 2, wherein the vibration damping filler is made of metal or metal oxide particles. 4. The sound insulating flooring material according to claim 3, wherein the metal is iron, lead or zinc. 5. The sound insulating flooring material according to claim 3 or 4, wherein the particles of the vibration damping filler are crystalline. 6. The sound insulating flooring material according to any one of claims 1 to 5, wherein the core material is plywood, foamed plastic board, wood board, or asbestos cement board. 7 The density of the glass fiber composite resin layer is 1.0~
3.0/cm ³ The sound insulating flooring material according to any one of claims 1 to 6 of the claims for utility model registration, which is within the range of 3.0/cm 3 .