JPH0213655A - Impact absorbing floor material - Google Patents

Abstract

PURPOSE:To provide enough rigidity and to improve impact noise absorbing characteristics without increasing thickness by a method wherein a resin composite substance layer having given characteristics, a plywood layer, and an irregularity regulating substance layer are laminated to a wood system surface material layer for integral formation. CONSTITUTION:At least one layer each of a resilient layer of a resin composite substance 3 formed by amorphous or low crystalloid thermoplastic resin having a given range of modulus of rigidity and loss tangent and a fiber net and a layer of a plywood 4 is laminated to a layer of a wood system surface material 2. Further, a layer of an irregularity adjusting substance 5 is added thereon, the layers are laminated for integral formation to form an impact absorbing floor material 1, which is disposed on a floor slab 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a single-type or directly-attached five-type wood-based shock-absorbing flooring material. It is suitable for use on floors above floors in apartment complexes, and is used to reduce the impact noise of floors, such as the sounds of moving tables, chairs, etc., or the sounds of people walking, especially the sounds generated when walking while wearing hard slippers. This article focuses on shock-absorbing flooring materials that can provide a comfortable living environment by blocking these sounds and preventing them from propagating downstairs.

[If conventional technology 1] Impact noise that is transmitted from the upper floor to the lower floor through the concrete slab in a concrete apartment complex is caused by the sound generated when moving tables and chairs, and the sound generated when tableware such as spoons is dropped. Lightweight floor caused by falling hard objects such as! Impact noise can be broadly divided into i-striking height and heavy floor impact noise, which is generated when a soft heavy object falls, such as the sound that occurs when a child jumps. Of these, heavy floor impact noise can be solved by increasing the rigidity of the concrete floor slab by increasing the thickness of the concrete slab or increasing the number of beams.
In recent years, the slab thickness, which used to be 20 to 130 m, has been standardized to 150 m or more, so complaints due to heavy floor impact noise have almost no longer occurred.

On the other hand, it is believed that it is effective to use soft upholstery on the floor surface to absorb light floor impact sound, and for this reason, in Japan's current apartment complexes, the method of laying carpets, etc. on the floor surface is widely used. However, in recent years, asthma caused by dust mites in carpets has become a serious problem, and flooring materials that can replace carpets have become desirable.

On the other hand, wood-based flooring materials have the advantages of being free from dust mites, easy to clean, easy to remove dust, etc., and being like a needle bed. Furthermore, wood-based flooring is a great substitute for the coldness of steel and concrete buildings, and the beauty of the wood's color tone and grain gives a psychological sense of peace, and its heat-retaining and heat-insulating effects make it popular among naturalists and wood grains. In recent years, not only has iJB been used as a flooring material in newly constructed properties, but RiffA-
There is also a growing need for re-adhesive materials to be used during maintenance. However, wood flooring has poor sound insulation properties (particularly for lightweight floor impact noise), and especially in apartment complexes, there is a problem in that the sound from the rooms on the upper floor is easily transmitted to the rooms on the lower floor. There have been many complaints due to the above noise, and there is a desire for the development of a superior wood flooring material with high sound insulation properties.

When using conventional wood flooring, in order to improve the low sound insulation properties, which is a drawback of wood flooring, an impact material made of a laminate of glass wool and rock wool is placed under the flooring. Measures have been taken to absorb shocks from above the floor (lightweight method shocks) by increasing the thickness of the floorboards to 150 to 200m, and by placing low (soft) rubber or urethane cushioning materials with a low spring constant on some of the floorboards. has been done.

In addition, as a shock-absorbing flooring material, a sound-insulating flooring material (Japanese Patent Application Laid-Open No. 59-173.456
Publication), wood fiber boards were attached to both sides of the damping steel plate (
[Puta]@Panel (Japanese Unexamined Patent Publication No. 130.537/1983)
Sound insulating flooring material with FRP layers on both sides of core H
-163.843) etc., and some of the present inventors have also added an elastic layer of a fiber resin composite made of soft resin and fibers between the wood surface material and the uneven body, and plywood. Patent Application No. 62-336.476 provides a layer of 336.476/1983, and Japanese Patent Application No. 64.817/1983 provides an elastic layer of a resin composite made of thermal I'iJ plastic resin and a layer of plywood. The proposal was first made by the issue.

[Problems to be Solved by the Invention] However, in the method of increasing the thickness of the floorboards, parts of the sound-insulating floor structure become extremely II due to the architectural design, resulting in problems in opening and closing doors and the floor being too high. There are problems such as the living space feeling psychologically small due to the There is also the problem that the cost of materials increases as the thickness of the flooring (board) increases, resulting in higher costs. In addition, the method of installing a soft rubber or urethane cushion layer under the flooring uses a cushioning material with a low spring constant (fluffy), which makes the walking sensation soft and uncomfortable, or creates a feeling of discomfort when walking on furniture. It is dangerous because the stability of
For example, when the furniture is a cupboard, there are problems such as when a person walks by the cupboard, the cupboard shakes and the dishes make noise.

Furthermore, a thin plywood board with a thickness of 5 to 6 seconds is used as a surface material, and a foam molded body is laminated and integrated on this surface.
2. Although there are flooring materials made by laminating and sewing veneers of Om, these are not sufficient in terms of rigidity and stability.

In addition, those with an elastic layer of a fiber resin composite made of a fiber resin made of soft resin and fibers and a plywood layer between the wood surface material and the uneven body have improved shock absorption ability, rigidity and stability. However, when a thermosetting resin is used as the soft resin, it is necessary to perform a thermosetting process when manufacturing the laminate, making the work complicated and requiring a long manufacturing time per sheet, which reduces productivity. It will be inferior to In addition, even when only thermoplastic resin is used, the manufacturing process can be carried out using only a heat bonding process and is simple, but if the matrix strength of the resin composite is low and the strength of the wood surface material or plywood is low. However, there is a problem in that the strength of the entire laminate decreases.

[Means for Solving the Problems] The present invention has been made in view of the above points, and it is possible to perform shock absorption without increasing the thickness of the floorboard or using cushioning material such as rubber. We provide impact-absorbing flooring materials that can fully meet the rigidity and stability requirements of customers and can be produced efficiently. made of thermoplastic resin with a shear modulus of elasticity of 106 to 1010 d at 20°C
yn/crA, loss tangent (tan δ) of 0.02 or more, and a structure in which at least one elastic layer of a resin composite made of a fiber net and at least one plywood layer are provided, and each of these layers is laminated and suspended. By covering the flooring, it solves the drawbacks of conventional wood flooring.

That is, the present invention provides a layer of wood-based surface material made of an amorphous or low-crystalline thermoplastic resin with a shear modulus of elasticity of 10 to 10" dyn/ci and a loss tangent (tan) at 20°C.
δ) 0.02 or more and at least one plywood layer each of an elastic body layer of a resin composite made of a resin and a fiber net, and each of these layers is laminated and then suspended. In addition, the wood-based surface material layer is made of an amorphous or low-crystalline thermoplastic resin and has a shear modulus of elasticity of 10 to 1010 dyn/cfII at 20°C and a loss tangent (tan δ) of 0.02 or more. A shock-absorbing flooring material comprising at least one elastic layer of a resin composite made of fiber net and at least one plywood layer, and an additional layer of unevenness, and each of these layers is laminated and suspended. Furthermore, the wood-based surface material layer is made of an amorphous heavy or low-crystalline thermoplastic resin and has a shear modulus of elasticity of 10 to 1010 dyn/d at 2°C and a loss tangent (tan δ) of 0.
02 or more and at least one plywood layer each, and at least one layer of the uneven adjustment body. At the same time, a resin composite is pasted on the
It is a shock absorbing floor material made by laminating and resting each of these layers,
Therefore, in the above impact-absorbing flooring material, the amorphous or low-crystalline thermoplastic resin of the resin composite layer is a polyester resin, a polyamide resin, an acrylic resin, a polyolefin resin, or a thermoplastic polyurethane resin. The gist of the invention is that it is at least one type of Noura.

The present invention will be described above based on the drawings. In FIG. 1, reference numeral 1 indicates a shock-absorbing flooring material of the present invention, and the flooring material 1 has one layer each of a wooden surface material 2, a resin composite 3, and a plywood 4, and these layers are laminated. -Has a suspended structure.

As long as at least one layer of each of the resin composite and plywood is present, the shock absorbing effect will be achieved, but in order to maximize the effect, it is preferable to laminate a plurality of resin composite layers and plywood.

Next, FIG. 2 shows an enlarged view of the resin composite 3, which is composed of a thermoplastic resin 3a and a fiber net 3b.

Further, in order to further develop the shock absorbing effect, a layer of uneven adjustment body 5 may be further provided where one layer each of resin composite 3 and plywood 4 is provided, as shown in FIG.

FIG. 4 shows another embodiment of the present invention in which an elastic layer of a resin composite 7 is further provided on the back surface of the uneven adjustment body 5 shown in FIG. In this case, the resin composite 7 may be provided not only on the back surface of the uneven adjustment body 5 but also on the front surface (C), or may be provided on both surfaces.

The first characteristic required of such impact-absorbing flooring materials is impact-absorbing performance. This is because the impact applied to the wood flooring material is generally transmitted to the resin composite as solid propagation, and the resin composite converts this vibration into thermal energy through internal loss and absorbs it. Much depends on the nature of the Therefore, as for the resin composite, the larger the loss tangent (tan δ) as m representing the internal loss, the higher the impact absorption performance.

The above-mentioned wood surface material is not particularly limited, but is appropriately selected and used in consideration of its location, purpose, appearance, abrasion, rigidity, stability, etc. However, from the point of view of shock absorption performance, the higher the rigidity of the wood surface material, the more effective it is, and the shear modulus at 20'C is 108 dyn/
It is more preferable that it is rn or more.

The thermoplastic resin used in the above resin composite is not particularly limited, and may be selected depending on the requirements such as shock absorption performance, adhesion to wood surface materials and uneven surfaces, and no warping as a shock absorption flooring material. It depends on what is selected. However, these thermoplastic resins need to be amorphous t1 or have low crystallinity in view of their shock absorbing ability.

Examples of the elastic thermoplastic resin include rubbers such as polynisder resin, polyamide resin, acrylic resin, polyolefin resin, thermoplastic polyurethane resin, and polybutadiene resin.

Among them, from the degree of shock absorption ability, the temperature range in which it is exhibited, the adhesiveness with the wood-based surface RFC+ + Aya J unevenness adjustment body, the melting point of the resin composite related to adhesiveness, etc.
Particularly preferred are polynyester resins, polyamide resins, acrylic resins, polyolenoin resins, and thermoplastic polyurethane resins.

Such thermoplastic resins have a shear modulus of elasticity of 10 to 1010 at 20°C in order to exhibit excellent impact absorption properties.
dyn/cm range, preferably 107-109 dyn
/cd, and the loss tangent (tan δ) is 0.
02 or more, preferably 0.1 or more, more preferably 0.5
The above is necessary. Shear modulus at 20℃ is 1010
If it is larger than dyn/cIrt, or the loss tangent (t
If an δ) is smaller than 0.02, the expected impact absorption performance cannot be obtained, and the shear modulus at 20°C is 1.
When it is smaller than 06 dyn/cn, the fluidity is high and there is a problem in practical use.

In this case, since the matrix strength is insufficient with only thermoplastic resin, fillers, short fiber fillers, fibrous nonwoven fabrics, etc. have already been blended in order to improve this strength. However, when using thin wood-based surface materials or plywood for flooring, or when making slits in the surface material of moeki materials to improve shock absorption performance, the filler applied earlier may be used. Even if such components are blended, it is difficult to maintain the matrix strength to a level that can withstand practical use. For the above reasons, one of the main points of the present invention is to use a fiber net as a component of the resin composite.

In other words, fiber net is different from materials such as fillers mentioned above,
Since it has sufficient strength in its white form, by blending it as a component of a resin composite, it is possible to impart matrix strength that fully satisfies the intended purpose.
It's Shino.

In this case, the fiber net used is appropriately selected from the viewpoints of the strength of the composite, physical properties as a flooring material, ease of handling, price, etc.
Synthetic fiber nets such as tyrene, polyvinyl pyrene, polyvinyl chloride, polyester or nylon, inorganic fiber nets such as glass and carbon fiber, and metal fiber nets such as iron, aluminum, stainless steel, and copper are listed. It will be done. Among these, synthetic fiber nets are particularly preferred from the viewpoint of ease of handling and price of the flooring material. In addition, regarding the fiber density and fiber #Il diameter of such a fiber net, 19 of the resin composites,
There are 10 types that can be selected depending on the strength, but the density of fiber 1 is preferably 10 mesh or more based on the strength of the resin composite, and the fiber diameter is based on the adhesive strength between the resin composite and the wood surface material or plywood. It is preferable that the thickness is greater than or equal to the thickness of the resin composite. Furthermore, such a fiber net is not limited to the use of only one piece as in the embodiment shown in Figure 2;
A plurality of sheets may be used as long as the thickness is equal to or less than the thickness of the resin composite.

Further, in order to reduce fluidity and improve elasticity, the resin composite may contain a filler in addition to the above-mentioned fiber net, or may be used in combination with fibers other than net-like. Examples of such fillers include carbon-based substances such as carbon black and graphite; inorganic substances such as clay, silica, talc, calcium carbonate and magnesium carbonate; and metal oxides such as titanium dioxide and No. Examples include metal salts such as magnesium hydroxide and aluminum hydroxide. On the other hand, as fibers other than net-like fibers, bulky porcelain fibers are suitable, and nonwoven 45, felt, etc. are suitable for θf. It is preferable that this fiber be formed into a bulky plate having a certain thickness and composited with a resin. In this case, the thickness of the non-net fiber layer is preferably about 0.5 to 5 m.

In addition, fillers such as lightweight foams (microballoons) can also be added to the W4 fibers.

The blending of such fillers and fibers other than net-like fibers is not particularly limited, but it is preferably 5 to 200 parts by weight per 100 parts by weight of the thermoplastic resin.

Furthermore, if necessary, crosslinking agents, plasticizers,
It can be used by adding stabilizers or flame retardants.

This type of resin composite exhibits excellent shock absorption properties!
In order to achieve this, it is preferable that the density is in the range of 0.6 to 6.0 g/cm3, particularly in the range of 1.0 to 2.0 g/cm3. If the density is less than 0.6g/cm3,
High frequency impact sound absorption cannot be performed sufficiently, and the density is 6.
If it is larger than O5j/cm3, the rigidity of the floorboard itself will be significantly reduced and it will no longer function as a flooring material.

It is preferable that the shock-absorbing flooring 1 of the present invention has a resting thickness of 15 to 25#, and the thickness of the resin composite 3 is 1 to 5# from the viewpoint of covering the thickness of the floor +41 as little as possible. Particularly preferred is 3 to 5 m. In addition, the plywood 4 has a thickness of 1 to 3M,
In particular, it is preferable to wear one or two shoes.

In the present invention, for example, a polystyrene foam, a polyolefin foam, a wooden board, etc. are used as the irregular body 5, and the thickness thereof is preferably 3 to 10 mm.

Various methods can be used to produce the impact-absorbing flooring material of the present invention, depending on the physical properties of the vI surface, plywood, and resin composite. Since the resin composite has thermoplasticity, a heating IfX method such as a hot press or a hot roll is generally used. For example, the resin composite can be placed between the water-based surface material and the plywood in the form of powder, pellets, or chunks and heated and pressed to directly attach the flooring material, or the resin composite can be preformed into a sheet of a predetermined thickness. A method of laminating this between a wood-based surface material and plywood and then heat-pressing this laminate,
Alternatively, the resin composite may be extrusion coated onto a water-based surface material or plywood, and then the other wood-based surface material or plywood is bonded by μ-pressing. In addition, as a method that does not use a direct heating process such as heat press or heat roll, there is also a method of induction heating and pressure bonding when the resin composite contains metal substances such as ferrite and iron. . Whichever method is used, from the viewpoint of productivity and yield, it is thought that the most effective method is to provide the resin composite in the form of a sheet between the water-based surface material and the plywood.

Furthermore, as a method for forming a composite of thermoplastic resin and fiber net, any method may be used depending on the type of thermoplastic resin and fiber net. A resin sheet,
Examples include a method in which fiber nets are inserted separately and molded in one step.

In the present invention, as shown in FIG. 5, for example, the flooring material 1 of the embodiment shown in FIG. 3 is suitably used as a directly bonded flooring material that is bonded fiT onto a reinforced concrete slab 6.

[Example] Hereinafter, the present invention will be explained in more detail by giving specific examples.

Examples 1 to 3 A thermoplastic resin having the composition shown in Table 1 was kneaded using a pressure kneader, and the kneaded product was formed into a sheet using an extruder equipped with a T-die to produce a thermoplastic resin sheet with a thickness of 1. did. The dynamic mechanical properties of this thermoplastic resin were measured using a non-resonant forced vibration type viscoelasticity measuring device.
The shear modulus of elasticity at 20''C was measured in a temperature dispersion test using a sheet of paper in shear mode, frequency 10t+z, and arm temperature rate °C/min.
5Q, it was 8.

Next, a fiber net shown in Table 1 (shown in Table 1) was inserted between the two thermoplastic resin sheets and melted and pressed together using a heat press to create a resin composite. This resin composite was cut out to a width of 50 mm and Tensile speed If 500mm/m by tensile testing machine
Matrix strength was measured at in.

This resin composite is laminated as an elastic layer between a 3m thick decorative board, which is a wood surface material, and a 3m thick plywood board, as shown in Figure 3, and is heat-pressed using a heat press to create an uneven surface on the plywood side. A 5mM polyolefin foam was laminated and integrated as a regulating body to obtain a flooring material. This floor material was directly pasted on a 150 mm thick concrete slab floor according to the procedure shown in FIG. The results are shown in Table 2. In addition, the sound insulation grade of the width suspension impact height in the case of only a concrete slab was determined to be L-55.

Comparative Example 1 Instead of the floor H used in Examples 1 to 3, a conventional wood flooring material was used to directly apply the floor to the same E1 concrete slab floor as in Examples 1 to 3. The impact isolation characteristics of this floor structure were measured in the same manner as in Example 1. Second result
As shown in the figure.

Comparative Examples 2 to 3 The matrix strength of the elastic layer when the elastic layer was made only of thermoplastic resin instead of the flooring used in Examples 1 to 3 and the flooring using this elastic layer were as follows. Examples 1-3
The material was applied directly onto a concrete slab floor similar to the above, and the impact isolation properties of this floor structure were measured in the same way as in Example 7. The results are shown in Table 2.

As is clear from the results shown in Table 2, the present invention attenuated vibrations by 15 dB in the case of lightweight impact sound compared to conventional wood-based flooring materials based on the sound insulation class of academic standards. By inserting a fiber net into the plastic resin, the matrix strength of the elastic layer made into a resin composite is improved, making it sufficiently durable for use as a flooring material.

Table 1 (Note) Amorphous polyester: Amorphous polyester with a glass transition point of -4°C 100 parts by weight clay
Acrylic polymer with a glass transition point of -4°C, 30 polymers, 60 polymers, ethylene/acrylic copolymer, 40 Φ joints, epoxy compound
0.2 polymerization part nylon: nylon fiber net] ~ 60
Mesh Bolipro: Polypropylene fiber net 1B Metsushiko - Table 2 [Effects of the invention] As explained above, the impact-absorbing flooring material of the present invention does not need to be thick like conventional impact-absorbing flooring materials. Even though it is almost the same thickness as regular wood flooring, it has sufficient impact sound absorption properties, as well as sufficient rigidity and stability as a flooring material. It has excellent properties as a flooring material, such as being free from shaking, and is extremely useful as a housing building material.

4. Description of the drawings Figure 1 is a perspective view of the shock absorbing flooring material of the present invention, Figure 2 is a perspective view of the shock absorbing flooring material of the present invention
A perspective view of a resin composite made of J plastic resin and a fiber net, FIGS. 3 and 4 are longitudinal cross-sectional views of the impact-absorbing flooring material of the present invention, and FIG. 5 is a perspective view of the impact-absorbing flooring material shown in FIG. 3. It is a longitudinal cross-sectional view of a state in which construction is performed on a slab.

[Explanation of symbols] 1...Shock absorbing flooring material 2...Wood surface material 3.7
... Resin composite 4 ... Plywood 5 ... Uncontoured body
6... Floor slab 3a... Thermoplastic resin 3b
...Textile net patent applicant Nippon Steel Chemical Co., Ltd.

Claims (4)

[Claims] (1) The wood surface material layer is made of amorphous or low-crystalline thermoplastic resin and has a shear modulus of elasticity of 10^6 at 20°C.
10^1^0dyn/cm^2, loss tangent (tanδ)
At least one elastic layer and one plywood layer of a resin composite made of a fiber net and a resin having a molecular weight of 0.02 or more
A shock-absorbing flooring material characterized by having layers provided one by one, and each layer being laminated and integrated. (2) The wood surface material layer is made of amorphous or low-crystalline thermoplastic resin and has a shear modulus of elasticity of 10^6 at 20°C.
10^1^0dyn/cm^2, loss tangent (tanδ)
At least one elastic layer and one plywood layer of a resin composite made of a fiber net and a resin having a molecular weight of 0.02 or more
A shock-absorbing flooring material characterized in that it is formed by providing layers one by one, further providing a layer of unevenness, and integrating these layers by laminating them. (3) The wood surface material layer is made of amorphous or low-crystalline thermoplastic resin and has a shear modulus of elasticity of 10^6 at 20°C.
10^1^0dyn/cm^2, loss tangent (tanδ)
At least one elastic layer and one plywood layer of a resin composite made of a fiber net and a resin having a molecular weight of 0.02 or more
A shock-absorbing floor characterized in that the layers are provided one by one, a layer of an uneven body is further provided, a resin composite is affixed to at least one side of the uneven body, and each of these layers is laminated and integrated. Material. (4) The amorphous or low-crystalline thermoplastic resin of the resin composite layer is at least one of polyester resins, polyamide resins, acrylic resins, polyolefin resins, and thermoplastic polyurethane resins. The impact-absorbing flooring material according to any one of claims 1 to 3, characterized by: