JPH0481020B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a damping floor member, and particularly to a damping floor member for direct attachment. (Conventional technology) Technological progress has been remarkable in recent years, and it is said that the remaining issues in the construction field are currently narrowing down to two issues: dew condensation and sound/vibration. sound·
In recent years, various countermeasures have been taken to address the problem of vibration, and although improvements have been made, there are still many areas where sufficient effects cannot be achieved due to technical difficulties. Flooring materials are an example of this, and although various studies have been conducted, there is currently no material that exhibits good performance. (Problem to be solved by the invention) Among flooring materials, wooden flooring has advantages such as being able to maintain cleanliness, being difficult for pests such as mold and mites to inhabit, and having a subdued color tone. The number of residents requesting floors is increasing. However, the only disadvantage of wooden flooring is that it cannot at all reduce floor impact noise due to the sound of walking on the floor or the sound of objects falling, and considering the inconvenience to the people living downstairs, wooden flooring cannot be used upstairs. is the current situation. Against this background, the inventors of the present invention conducted extensive research into flooring materials that have excellent floor impact noise mitigation performance.The inventors found that by using the following materials as floor construction materials, the floor impact noise mitigation effect was significantly improved. It was confirmed that this occurs, and the present invention was completed. The restraining type vibration damping floor member for direct attachment of the present invention is damped by the synergistic force between the crosslinked viscoelastic body and the base cloth or foam made of fibrous material, or the sheet base material made of a laminate of fibrous material and foam. Effect and water resistance, moisture resistance, compressibility,
This method takes advantage of the fact that a damping floor member with excellent restorability and adhesiveness can be obtained. As is conventionally known, it is known that floor impact noise can be easily alleviated by using a material that can be compressed and deformed easily even under small stress, such as felt. . On the other hand, materials with such performance undergo too large a compression deformation, so if a floor material that requires a smooth finished surface, such as an essential floor, is used, distortion may occur even at the height of furniture, etc. This results in a fatal drawback that smoothness cannot be maintained. Therefore, the measures currently being taken to counter floor impact noise are compressed glass wool,
The floor is constructed by combining several types of asbestos, wood chips, cement boards, rubber boards, inorganic board materials, plywood, etc., or by raising these combinations above the floor slabs, and also by putting sound-absorbing materials in the space between the floor slabs and the ceiling. In some cases, the ceiling is now made of a vibration-proof rubber suspended ceiling to reduce floor impact noise through the combined effect of the floor and ceiling. However, the method requires a large number of raw materials and high raw material costs. There is a lot of material loss during construction. The cost increases due to the large number of construction steps. Since the number of construction steps is large, there is a high risk that the floor impact sound mitigation performance will differ depending on the contractor.
In addition, the total thickness of the floor members for alleviating floor impact noise becomes extremely thick, and if buildings are kept at the same eave height, the living space must be made narrower or the number of floors must be reduced. On the other hand, if buildings have the same number of floors and the same living space, the disadvantage is that the increased height of the eaves will add to the construction cost of the building. The present inventors solved the above-mentioned drawbacks,
Numerous trials were conducted with the goal of creating a restraining type vibration-damping flooring material for direct attachment that can reduce floor impact noise at low cost, can be directly attached only to thin materials, and can reduce floor impact noise even when finished with wood flooring. After repeated mistakes, we found that when liquid rubber, which can be obtained by reacting at room temperature to form a crosslinked viscoelastic material, was used in combination with a base material made of fibers, foam, or a laminate of fibers and foam, it was found that floor impact noise was reduced. As a result of various tests, we have completed the present invention. In other words, when liquid rubber is used alone to obtain a crosslinked viscoelastic body through room-temperature reaction, it is expensive and unsuitable for general-purpose flooring, and when reacted between plate-shaped restraining materials, However, unless a large amount of material is used and a method is used to extrude the excess material, large cavities tend to occur randomly, resulting in product variations. On the other hand, when a base material made of fibers, foams, or a laminate of fibers and foams is used without a crosslinked viscoelastic material, it easily undergoes compressive deformation even under small stress, and has excellent floor impact resistance. Although it shows a sound mitigation effect, the restoration performance is poor and the compressive deformation strain is too large, so if you apply a floor material that requires a smooth finish, such as a wood finishing material, the distortion may occur even at the height of furniture, etc. This has the fatal drawback that smoothness cannot be maintained. Also, water resistant,
They also have the disadvantage that they generally have poor moisture resistance and can easily become habitats for mold and mites.
In addition, especially when foam is used as the base material, there is a tendency for the reverberant sound in the room itself where the floor impact is applied to be large, and there is also a drawback that it is necessary to consider the nuisance to the neighboring room due to the reverberant sound. . (Means for Solving the Problems) The present inventors have proposed a vibration damping floor member that eliminates the above-mentioned drawbacks of cross-linked viscoelastic bodies with excellent vibration damping properties and has excellent vibration damping properties, economical efficiency, and durability. We have obtained the knowledge that an extremely excellent vibration-damping floor member can be obtained by interposing fibers or foams. The feature of the present invention is that the hole area is 0.03 cm ² ~ 13
The thickness is 2mm to 20mm with countless ^cm2 holes.
A base material made of fibers or foams, or a laminate of fibers and foams, wherein the area ratio of holes and non-holes is 2:8 to 8:2, and the holes and / Or, the floor component is a base material with a crosslinked viscoelastic material formed on the entire surface thereof, and the floor component is adjacent to the top and bottom of the base material with a crosslinked viscoelastic material, or the floor component is adjacent to the top of the base material with a crosslinked viscoelastic material. The present invention is directed to a constraint-type vibration-damping floor member for direct attachment, characterized in that the restraint material includes a restraint material and a floorboard. The cross-linked viscoelastic body formed in the holes and/or the entire surface of the present invention has a main component containing a hydroxyl-terminated telechelic polymer having room temperature reactivity as a basic component;
It is characterized by being obtained by a curing reaction with a curing agent having two or more isocyanate groups per molecule. In addition, in the damping flooring material of the present invention, the crosslinked viscoelastic body undergoes a curing reaction at room temperature, and the product produced after the curing reaction maintains its solid shape even when heated to 80°C.
The hardness under the conditions of °C is the Japan Rubber Association standard SRIS-
It is characterized by forming a crosslinked viscoelastic body that satisfies the three conditions of being 60° C. or less on a C-type hardness tester defined in 0101. (Function) In the present invention, "constraint type" refers to a method of damping vibration using a restraining material, which is one of the vibration damping processing methods. As shown in FIGS. 7A and 7B, by inserting the viscoelastic body 4 between the substrate 3 and the restraint material 2, when vibration is applied, the movement of the base material 17 is controlled by the shearing force of the viscoelastic body 18 and the restraint material. Due to the restoring force of 19, a force that tries to return to the original state before vibration acts, and the effect of stopping the vibration more quickly becomes high. The method in which the viscoelastic body 18 is sandwiched between the substrate 17 and the restraint material 19 in this manner is called a restraint-type vibration damping method. In the present invention, the "restraint material" refers to the viscoelastic body 18
This refers to a plate-shaped object that is brought into close contact with the surface opposite to the surface in contact with the substrate 17, and a material with relatively high rigidity is suitable for stopping the movement of the vibrating substrate 17. In the present invention, "restraint" refers to a viscoelastic body that is tightly attached to a vibrating object via the viscoelastic body 18 and that causes the vibrating substrate 17 to exhibit minute waving phenomenon when it is vibrated. If 8 is in close contact with the restraining material 19, a slight difference in movement will occur in the waving phenomenon between the restraining material 19 and the substrate 17. For this purpose, the viscoelastic body 18 is controlled by the movement of the substrate 17 and the restraining material 1.
In order to make a movement that attempts to follow both of the movements of 9, shear stress is inevitably applied within the viscoelastic body 18. The object that causes this movement is the restraint material 19. Therefore, the restraint material 19 and the substrate 17 are
If the vibration is applied from the side, the situation will be exactly the opposite,
Since the substrate 17 works as the restraint material 19 and the restraint material 19 works as the board 17, the restraint material 1
Although it is not possible to distinguish between the restraining material 9 and the substrate 17, they are generally referred to as the restraining material 19 and the substrate. In other words, the following is thought to be the reason why when a damping floor is constructed, it has excellent properties including floor impact sound mitigation performance and eliminates the drawbacks when used alone. By drilling a countless number of holes alternately in the substrate and forming a cross-linked viscoelastic body, the base material can easily be compressed and deformed. Due to its stress characteristics, when the cross-linked viscoelastic body receives an impact, it absorbs the impact energy through the restraint effect and shear shear stress with the floor members in contact with the periphery of the hole and the upper and lower surfaces, resulting in an excellent floor impact noise mitigation effect. it is conceivable that. In addition, especially when a base material made of fibers and a crosslinked viscoelastic material are combined, the entire surface layer of the fibers or around the holes can be impregnated, improving adhesive strength and reinforcing the base fabric, making it water and moisture resistant. can significantly improve sex,
By adding antifungal agents etc. to the crosslinked viscoelastic body,
It can prevent the growth of mold and mites. In addition, the crosslinked viscoelastic material has excellent compression recovery properties and can overcome the biggest drawback of fibers and foams. In terms of cost, fibers and foams are cheaper than cross-linked viscoelastic materials, allowing for very large cost reductions, and the ability to obtain a damping layer in the form of a sheet is very efficient. It also improves. In addition, long length processing is also possible, which is advantageous in terms of reducing material loss. Next, the cross-sectional configuration of a floor using the damping floor member of the present invention will be described. As shown in Figures 1 and 2, a base material made of fibers or a base material made of foam on which a cross-linked viscoelastic material is arranged is used by adhesively fixing a relatively rigid plate-like material as a restraining material. Either method can be used, such as a method that also uses a method that also adjusts unevenness with the floor slab as shown in Figures 3 and 4. In particular, as shown in Figure 4, a method that is used for two layers The effect in this case is very large. Next, the floor components will be explained step by step. Examples of finishing materials include wood floor finishing materials, vinyl chloride floor finishing materials, and cork tiles, which are currently used as floor finishing materials. Wooden flooring materials include flooring boards, flooring blocks, single-layer flooring made of mosaic parquet, natural wood decorative composite flooring, specially processed decorative composite flooring, natural wood decorative composite blocks, composite flooring made of specially processed decorative composite blocks, and sawn wood flooring. Examples include flooring made of boards, boards, cork, and laminated layers. For these, it is preferable to make the plate layer thinner in order to alleviate floor impact noise. Specific examples of restraining materials include the aforementioned wooden flooring materials, plywood, compressed paper, plastic boards, thin metal boards, particle boards, wood chip cement boards, fiber boards, pulp cement boards, wood wool cement boards, flexible boards, and soft flexible boards. board, large flat board, asbestos cement board, asbestos cement perlerite board, asbestos cement calcium silicate board,
Gypsum boards, etc. can be used regardless of whether or not the surface is decorated or has holes, as long as they are plate-shaped, but if the purpose is to reduce the total thickness of the floor component, A thin plate is desirable. Also, as a sheet-like and film-like base material,
Vulcanized rubber, non-vulcanized rubber, vinyl chloride, polyethylene, polypropylene, nylon, polyester,
Examples include films and sheets made of vinylidene chloride, ethylene-vinyl acetate copolymer, and the like. Note that the restraining material and the substrate are made of the same material, and the opposite side to which the impact is applied serves as the restraining material, and when the impact is applied from the opposite side, the substrate serves as the restraining material. This is as illustrated in FIGS. 7A and 7B. Therefore, when the restraining material and the substrate are vibrated by the restraining material, they will be in exactly opposite states, with the substrate acting as the restraining material and the restraining material acting as the substrate, so it is difficult to distinguish between the restraining material and the substrate. Although it cannot be used as a restraining material, it is generally referred to as a restraining material or a substrate. Next, the substrate will be explained. Substrates made of fibers include synthetic fibers such as nylon, polyester, urethane, acrylic, polypropylene, and polyethylene, natural fibers such as wool, cotton, and linen, inorganic fibers such as glass and asbestos, and metal fibers such as aluminum and lead. These may be used alone or in combination. They may contain not only the above-mentioned fibers but also resins as a binder. Examples of base materials made of foam include urethane, polyethylene, polypropylene, styrene, vinyl chloride, ethylene-vinyl acetate copolymer, chloroprene, ethylene-propylene copolymer, natural rubber, butyl rubber, styrene-butadiene rubber, butadiene rubber, etc. . These may be of regular length or long length, but long length is preferable in terms of production efficiency. It may also be a pulverized foam product made of one material or a plurality of materials and hardened with a binder. The base material in which fibers and foam are laminated is a lamination of one type or several types of the above-mentioned fiber base material and foam base material, and in the case of a sandwich-like structure, the fibers may be on either the inside or the outside. It is necessary to drill holes in the base material in advance in order to form a crosslinked viscoelastic body, and the area of the holes is preferably 0.03 cm ² to 13 cm ² , more preferably 0.2 cm ²
~ ^5.0cm2 is good. That is, if the area of the hole is smaller than ^0.03cm2 , the viscosity before the curing reaction must be made very low, and the crosslinked viscoelastic body impregnated into the fiber and formed in the hole due to the speed of the curing reaction. The disadvantage is that it is difficult to control the thickness. On the other hand, if it exceeds 13 cm ² , the tensile strength of the base material is weak and the base material is likely to break during the manufacturing process, and when applied to a floor, the base material and the crosslinked viscoelastic material part will be damaged, especially at the edges. This is undesirable because it tends to cause a difference in compression characteristics between the two and causes a difference in level. Further, the shape of the hole can be round, oval, triangular, square, other polygons, slits, etc., and any shape can be used. The thickness of the base material is preferably 2 mm to 20 mm, and must be determined based on the density of the fibers in the base material, the diameter of the fibers, and the expansion ratio and material of the foam. If the base material thickness is less than 2 mm, the impact mitigation effect will be reduced, and if it exceeds 20 mm, the amount of crosslinked viscoelastic material will increase, resulting in little cost advantage and a large compression strain allowance. Undesirable. Next, the crosslinked viscoelastic material will be explained. The crosslinked viscoelastic material referred to in the present invention is liquid at room temperature, and after reacting at room temperature, the cured product retains a solid shape even when heated to 80°C, and has a hardness of It is preferable that the hardness satisfies the condition of 60 or less on the C-type hardness tester shown in the Rubber Association standard SRIS-0101. If the hardness of the crosslinked viscoelastic body of the present invention is 60 or more, it is not preferable because the viscoelasticity is lost and the desired vibration damping effect is reduced. Although the hardness could theoretically be zero, the desired effect can be obtained if the hardness is at least less than 60. In the present invention, it is necessary that the area ratio of the hole to the area other than the hole is 2:8 to 8:2, and if the area ratio is set within this range, a good impact mitigation effect can be obtained. Reactive substances that can satisfy the above conditions include:
Combinations of liquid rubbers having functional groups shown in the table and crosslinking agents can be exemplified. Considering the ease of controlling curing rate, cost, and availability of room-temperature reactivity, these materials have a hydroxyl group at the end and a main chain consisting of polybutadiene, hydrogenated polybutadiene, and polybutadiene. -Nitrile, polybutadiene-styrene, isoprene, etc., polyether polyols, polyester polyols, urethane acrylic polyols, aniline derivative polyols, etc. are preferably used alone or in combination. Further, as the curing agent for the reactive substance, an isocyanate-based curing agent is suitable,
It is necessary to have two or more isocyanate groups per molecule. Specific examples include toluylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate,
Mention may be made of isophorone diisocyanate, a prepolymer having terminal isocyanate groups,
They can be used alone or in combination. or,
Isocyanate curing agents can be used in combination with plasticizers due to problems such as blending ratio and/or viscosity, but the plasticizers must be dehydrated.
It is necessary that it not react with isocyanate compounds.

[Table] Although it is possible to obtain a crosslinked viscoelastic material that satisfies the present invention by combining only the essential components for the room-temperature reaction described above, various additions may be added in order to improve cost, workability, and physical properties. By adding the agent,
A wide range of stable crosslinked viscoelastic materials can be obtained. Examples of additives include plasticizers, fillers, bituminous substances, tackifying resins, antiaging agents, antifungal agents, flame retardants, catalysts, surfactants, coupling agents, and the like. The plasticizer is blended for the purpose of adjusting viscosity, adjusting workability, adjusting the substance of the crosslinked viscoelastic body, imparting flame retardance, and the like. Specific examples of plasticizers include naphthenic oil, paraffinic oil, amarotic oil, castor oil, cottonseed oil, pine oil, tall oil, phthalic acid derivatives, isophthalic acid derivatives, adipic acid derivatives, areic acid derivatives, and functional groups of liquid rubber. There are some that do not contain , and they can be used alone or in combination. When flame retardancy is required, halogen compound-based or phosphorus compound-based plasticizers can be used alone or in combination. Bituminous materials include straight asphalt, blown asphalt, and tar.
In order to obtain a desired crosslinked viscoelastic body, it can be used after being modified with a tackifying resin or a plasticizer in advance. Tackifier resins include natural resins, rosins, modified rosins, derivatives of rosins and modified rosins, polyterpene resins, modified terpenes, aliphatic hydrocarbon resins, cyclopentadiene resins, aromatic petroleum resins, phenolic resins, Alkylphenol - acetylene resin, xylene resin, coumaron -
Indene resin, vinyltoluene-α-methylstyrene copolymer, etc. can be used alone or in combination. Fillers are effective in improving vibration damping properties, sound insulation properties, and flame retardancy, and can be used to adjust the blending ratio of main ingredient/curing agent.
It is used for the purpose of adjusting viscosity and reducing compounding costs, and those commonly used in rubber and paints can be used. Specific examples include mica, graphite,
General-purpose fillings such as scale-like inorganic powders such as vermiculite, talc, and clay, high-density fillers such as ferrite, metal powder, barium sulfate, and lithopone, calcium carbonate, finely divided silica, carbon, magnesium carbonate, aluminum hydroxide, and asbestos. Agents can be used alone or in combination. Moreover, antimony trioxide, borax, etc. can also be used for the purpose of flame retardation. Other additives include anti-aging agents, catalysts, pigments, surfactants, coupling agents, antifungal agents, etc., and these can be added as necessary. Next, the present invention will be explained with reference to Examples and Comparative Examples. Examples and comparative examples are shown in the table.

【table】

[Table] (1) Prepare a base material according to the formulation examples shown in Examples and Comparative Examples, add and mix the specified curing agent, and fill in the holes of the perforated base material shown in the table. After crosslinking, a vibration damping floor member with a crosslinked viscoelastic body was obtained. In Example 1, the upper surface of the damping floor member obtained by the above method was adhered to a 5.5t thick wood composite flooring, the lower surface was adhered to a 2.5t plywood, and a 2t thick polyethylene foam was further bonded to the lower surface of the 2.5t plywood. It was glued together and used as a measurement sample. In Example 2, 2.5t plywood was attached to the upper and lower surfaces of the damping floor member obtained by the above method, and 5.5t plywood was further attached to the upper surface.
Wood composite flooring was glued on, and a damping floor member was further glued on the bottom surface to prepare a measurement sample. In Comparative Example 1, 5.5t thick wood composite flooring was attached to the upper surface of the damping floor member obtained by the above method, 2.5t plywood was attached to the lower surface, and 2t foamed polyethylene was further attached to the lower surface of the 2.5t plywood, and measurements were taken. It was used as a sample. Comparative Example 2 is a measurement sample in which 5.5t thick wood composite flooring is pasted on the top surface of the damping floor member obtained by the above method, 2.5t plywood is pasted on the bottom surface, and further 2t foamed polyethylene is pasted on the bottom surface of the 2.5t plywood. did. In Comparative Example 3, 5.5t wood composite flooring was pasted on the top surface of the vibration damping floor member obtained by the above method,
A 2.5t plywood was attached to the bottom surface, and a 2t polyethylene foam was attached to the bottom of the 2.5t plywood to serve as a measurement sample. (2) Mix the main ingredient of the viscoelastic compound obtained in the same manner as in (1) above and a curing agent at a predetermined ratio, and form a 12 mm x 50 mm
It was poured into a formwork with dimensions of 50 mm and used as a sample for hardness measurement. After curing for 7 days at room temperature and 7 days at 50°C, hardness was measured using a C-type hardness meter specified in the Japan Rubber Association standard SRIS-0101. (3) 12mm x 50mm x 50mm obtained in the same way as hardness measurement
Apply release paper to the crosslinked viscoelastic material surface of the sample,
After applying a load of 500 g and allowing it to stand at 80°C for 24 hours, it was unloaded, left to stand at room temperature, and was visually judged based on the magnitude of deformation after 4 hours. Those with sharp edges and little deformation are marked with an ○, and those with no sharp edges or large deformations are marked with an x. (4) To measure floor impact sound, the sample prepared in (1) above was attached to a 150 mm thick RC slab, and light impact sound was measured using a tapping machine. The measurement method was in accordance with JIS-A-1418, as shown in FIG. The results were shown in terms of floor impact sound insulation grade. (5) Using the damping floor member obtained in (1) above, 2.5t plywood was pasted on the top and bottom each, and a point load of 10 kg per 1 cm ² was applied to the end of a 30 cm square, and the base material was The strain margin of the crosslinked viscoelastic material was checked. Next, using the vibration damping floor member obtained in (1) above,
×50mm×50mm, the upper and lower sides were laminated to 2.5t plywood each, and the compression speed was 2mm/min using a compression tester.
After compressing it by 50% and holding it for 30 minutes, it was unloaded and the restorability was checked after 10 minutes. The difference in strain margin between the two was within 1 mm, and those that showed 95% or more restorability were marked with an ○, and those that were 95% or less were marked with an x. From the above, Example 1 is a case where the vibration damping floor member of the present invention whose base material is foamed polyethylene is applied with wood composite flooring material and plywood as restraining materials,
It shows good floor impact mitigation effects and compression properties necessary for flooring materials. Example 2 is an example in which a two-layer vibration-damping floor material is used in which the base material is a laminate of polypropylene fiber and polyethylene foam, and it exhibits an extremely excellent floor impact mitigation effect, and is also necessary as a floor material. It also has excellent compression characteristics. Comparative Example 1 shows a case in which the area of the hole forming the crosslinked viscoelastic body is outside the scope of the present invention, and is not preferable in that the compressive strain becomes large at the cut end. Comparative Example 2 shows a case where the thickness of the base material is outside the range of the present invention, and the compressive strain is large and the restorability is poor, and as a floor material, there is a high risk of destruction of the real part, etc., and it is difficult to reduce floor impact noise. This is not desirable as it has little effect. Comparative Example 3 has an area ratio of hole: base material other than the hole = 9:1, indicating that the effect of mitigating floor impact noise is small.

【table】

[Table] As described above, according to the present invention, the impact-reducing effect of the fibers and foam and the impact-reducing effect of the crosslinked viscoelastic body can be utilized to exert the effect of alleviating floor impact noise. By utilizing the good restorability of crosslinked viscoelastic materials, compressive strain, which is a drawback of fibers and foams, can be significantly improved. By forming a crosslinked viscoelastic material in a hole drilled in a base material made of fibers or foam, the effective bonding surface of the crosslinked viscoelastic material can be significantly increased, resulting in less deformation due to impact. Excellent vibration energy absorption effect due to restraint effect and shear deformation effect. It is possible to partially replace the cross-linked viscoelastic material with inexpensive materials such as fibers and foams, reducing costs in terms of materials, and the fibers and foams also serve as supports for vibration damping floor members, improving handling workability. The good thing is that it can be used as a general-purpose vibration-damping floor member because it increases work efficiency and reduces costs. Even if the thickness of the damping floor member is thin, it can still be effective, and since there is no need to increase the height of the building's eaves, it is extremely effective in reducing construction costs. Since it uses fibers and foam, it can also have an insulating effect. The present invention, which provides the above-mentioned merits and enables a wood flooring finish that has been more highly desired than before at a low cost, has great industrial utility value.

[Brief explanation of drawings]

Figure 1 shows a construction cross section of an example product of the present invention, in which plate-like restraining materials are applied to the upper and lower parts, and Figure 2 similarly shows a construction cross section of an example product of the present invention. An example in which the finishing material is an upper restraining material and the lower restraining material is a plate-like restraining material. FIG. Figure 4 shows a construction cross-section of an example product of the present invention, in which plate-like restraints are applied on the upper and lower sides, and further vibration damping and vibration damping are performed. An example in which the lower restraint material and the floor slab are used as restraint materials in consideration of land adjustment, and the damping member layer is two layers. Fig. 5 is a perspective view showing an example product of the vibration damping floor member of the present invention. 6A and 6B are explanatory diagrams showing an apparatus for measuring floor impact sound, and FIGS. 7A and 7B are explanatory diagrams showing the relationship between the restraining material and the substrate for the direction to which the impact was applied. 1...Wood flooring, 2...Upper restraint material,
3... Perforated base material, 4... Crosslinked viscoelastic body, 5...
Lower restraint material, 6... Unevenness adjustment material, 7... Floor slab, 8... Sound source room, 9... Tapping machine, 1
0... Sample, 11... Floor slab, 12... Sound receiving room, 13... Microphone, 14... Precision sound level meter, 15... Frequency analyzer, 16... Level coder, 17... Board, 18 ...Viscoelastic body, 19...
...Restraint material, 20...Excitation direction.

Claims (1)

[Scope of Claims] 1. A base material made of fibers or foams, or a laminate of fibers and foams, with a thickness of 2 mm to 20 mm, which has been subjected to innumerable holes with a hole area of 0.03 cm ^{2 to} 13 cm 2 The area ratio of the hole and the area other than the hole is 2:8~
8:2, the base material with a crosslinked viscoelastic body formed by forming a crosslinked viscoelastic body on the hole and/or the entire surface of the base material is used as a floor constituent member, and the base material with a crosslinked viscoelastic body is placed above and below the base material with a crosslinked viscoelastic body. A constraint-type vibration-damping floor member for direct attachment, characterized in that an adjacent floor constituent member or an adjacent floor constituent member and a floor slab are used as constraint members. 2. The crosslinked viscoelastic body formed in the holes and/or the entire surface contains a main ingredient having a hydroxyl group-terminated telechelic polymer that is reactive at room temperature as a basic component, and a curing agent having two or more isocyanate groups per molecule. The restraint-type damping floor member for direct attachment according to claim 1, which is obtained by subjecting it to a curing reaction. 3. The crosslinked viscoelastic material undergoes a curing reaction at room temperature, and the product after the curing reaction retains its solid form even when heated to 80°C, and its hardness at 20°C meets the Japan Rubber Association standard SRIS-0101. The restraint type for direct attachment according to claim 1, which is formed by forming a crosslinked viscoelastic body that satisfies the three conditions of having a hardness of 60 or less on a C-type hardness tester as defined in claim 1. Vibration damping floor components.