JPH0518988B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Field of Application) The present invention relates to a damping floor member, particularly a damping floor member for direct attachment. (Conventional technology) Technological progress regarding this type of vibration-damping floor members has been remarkable in recent years, and the remaining issues in the architectural field are:
It is said that the current situation is narrowing down to two points: dew condensation and sound/vibration. In recent years, various countermeasures have been taken to address the problem of sound and 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 carried out, there is currently no material that exhibits good performance. In other words, among flooring materials, there are many residents who request wooden flooring because of its advantages such as being able to maintain cleanliness, being difficult for pests such as mold and mites to inhabit, and having a calm color tone. It has increased. (Problem to be Solved by the Invention) However, the only drawback of wooden flooring is that it cannot at all reduce floor impact noise against the sound of walking on the floor or the sound of falling objects, and considering the inconvenience to the people living downstairs, Currently, wooden floors cannot be used on the upper floors. 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 finish, such as a wooden 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 boards, plywood, etc., or by floating the combinations of these materials from the floor slabs, and then adding sound-absorbing materials between the floor slabs and the ceiling. In some cases, the ceiling is made of anti-vibration rubber to create a suspended ceiling, and floor impact noise is currently mitigated by the overall effect of the floor and ceiling. However, the method requires a large number of raw materials, high raw material costs, and large material losses during construction. The cost increases due to the large number of construction steps. 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 the same number of floors and living space were to be maintained, the construction cost would be higher than that of a building with raised eaves. On the other hand, when using a film base material with an air-filled part alone, if there is no material to protect the convex thin film, the film will easily break if pressure is applied locally, and it may become a part of the flooring material. It has the disadvantage that it is not a material that can be used in layered form. Furthermore, among film base materials, those covered with a thin film not only on one side but also on both sides have a slightly higher load capacity than single-sided film products, but are not materials that can be used in a layered manner as flooring materials. Also, plastic cardboard with enclosed air is known, but those with increased surface film thickness and overall rigidity buckle under unexpectedly small stress when compressive load is applied, and are unable to recover. Not only does it have a fatal drawback as a flooring material, but it also has a drawback of poor floor impact sound mitigation performance. In order to eliminate the above disadvantages, if a polyolefin foam sheet is pasted on one or both sides, the floor impact sound mitigation performance will be improved, but if a plastic cardboard with enclosed air is used or not. There is no difference between the two cases, and even during compression, if the deformation limit of the polyolefin foam sheet is exceeded, it will buckle and will not restore its original shape, as in the case where the polyolefin foam sheet is not laminated. The present inventors solved the above-mentioned drawbacks,
Our goal is to create a restraining vibration-damping flooring material that can be applied directly to a concrete floor, which can be applied directly to concrete flooring, and which can reduce floor impact noise at a low cost. After much trial and error, we discovered that liquid rubber, which can be reacted at room temperature to form a crosslinked viscoelastic material, and a corrugated film base material with air-enclosed parts each have excellent floor impact sound mitigation performance on their own. It was discovered that when these two are used in combination, it not only exhibits the ability to further reduce floor impact noise, but also eliminates the drawbacks of using them alone.As a result of various tests, the patent application -93466 (Japanese Unexamined Patent Publication No. 62-253866) was completed. Furthermore, the present inventors repeated trial and error in an attempt to improve the above-mentioned method, and as a result, they developed a method using expanded polystyrene of 5 mm to 60 mm as an uneven absorbing material or as a constituent member of an uneven absorbing material, as disclosed in Japanese Patent Application Laid-Open No. 62-253866. It has been discovered that by combining the methods disclosed in 2012, floor impact sound mitigation performance can be significantly improved. In other words, although floor impact noise was improved with a wood-finished floor in Japanese Patent Application Laid-Open No. 62-253866, there is a need for a wood-finished flooring material that is even more effective at mitigating floor impact noise, and further reduces floor impact noise. was required. Therefore, as a result of intensive research into flooring materials with excellent floor impact sound mitigation performance, the present inventors have found that by using the following members as floor constituent materials, a remarkable effect of mitigating floor impact noise can be produced. This has led to the completion of the present invention. The vibration damping floor member of the present invention utilizes the vibration damping properties of an air layer and a crosslinked viscoelastic body with excellent vibration damping properties and compression properties, and also has a vibration damping function on the non-land absorbing material. It is. (Means for Solving the Problem) The present invention interposes a film base material in which convex portions and concave portions are alternately arranged between an upper floor component and a lower floor component that serve as at least a restraining material. , in the direct attachment restraining type vibration damping floor member in which the end portions of the film base material are partitioned by real parts, the film base material has convex portions filled with air; An air-filled film with a crosslinked viscoelastic material, the entire surface of which is filled with a crosslinked viscoelastic material, is inserted between the upper and lower floor components, and a non-contact film made of at least expanded polystyrene with a thickness of 5 mm to 60 mm is placed on the outside of the lower floor component. A restraining type vibration damping floor member for direct attachment, which is characterized by being provided with an absorbing material. Still another object of the present invention is to provide a film base material in which convex portions and concave portions are alternately arranged between an upper floor constituting member and a lower floor constituting member that serve as at least a restraining material. A constrained vibration damping floor member for direct attachment, in which the end of a film base material is partitioned by a real part, and the film base material is made of a film base material in which air is sealed in the part and a crosslinked viscoelastic material is filled in the entire surface of the recess including the concave part or convex part of the film base material. In this method, a groove with a depth of 2 mm or more is provided in the foamed polystyrene of 5 mm to 60 mm on the underside of the film base material, and an uneven absorbent material having an uneven cross section is attached as a lower floor component to form an integrated floor member. The present invention provides a restraining type vibration damping floor member for direct attachment. In the present invention, it is preferable that the non-uniform absorbent material is made of only foamed polystyrene or a laminate of foamed polystyrene and foamed polyethylene. In the restraint-type damping floor member for direct attachment of the present invention, the crosslinked viscoelastic material filled in the entire surface of the recesses including the recesses or projections of the film base material undergoes a curing reaction at room temperature, and the product after the curing reaction is It retains its shape even when heated to 80℃, and the hardness at 20℃ is 50 on the C-type hardness tester specified by the Japan Rubber Association standard SRIS-0101.
It is preferable that the following three conditions be satisfied. In the film base material in which convex portions and concave portions are alternately formed in the restraint type vibration damping floor member for direct attachment of the present invention, the volume of air in the convex portions that enclose air and the crosslinked viscoelasticity filled in the concave portions. The volume ratio of the convex part to the concave part is 2:8 to 8:2, the height of the convex part is 6 mm or less, and the crosslinking adhesive is filled only in the concave part or the entire surface of the concave part including the convex part. A main agent whose basic component is a telechelic polymer whose elastic body has a hydroxyl group at the end;
It is preferable that the curing agent be obtained by a curing reaction at room temperature with a curing agent having two or more isocyanate groups per molecule. In the restraint-type vibration damping floor member for direct attachment of the present invention, the convex portions containing air and the concave portions containing only the film are arranged alternately on the concave portions only or the entire surface of the concave portions including the convex portions of the film base material. The crosslinked viscoelastic material to be filled is
It is preferable that the resin be obtained by subjecting a main ingredient consisting of hydroxyl-terminated liquid polybutadiene and an asphalt plasticizer to a curing reaction at room temperature with a curing agent having two or more isocyanate groups per molecule. In the restraining type vibration damping floor member for direct attachment of the present invention, the upper floor constituent member or the lower floor constituent member used as the restraint material is made of wood finished flooring material or wood board material, and the upper floor constituent member and the lower floor constituent member are An air-filled film base material with a cross-linked viscoelastic material is inserted between them, and a non-land absorbent material made of foamed polystyrene or a laminate of foamed polystyrene and foamed polyethylene with a thickness of at least 5 mm to 60 mm is placed on the outside of the lower floor component. It is preferable to provide a gap to absorb unevenness between the concrete slab and the concrete slab. In the present invention, "restraint type", "restraint material", "restraint"
is as follows. Restraint type The restraint type is one of the vibration damping processing methods, and refers to a method of damping vibrations using a "restraint material." As shown in Fig. 7, when a viscoelastic body is sandwiched between a substrate and a restraining material and the vibration is applied, the movement of the substrate is controlled by the shearing force of the viscoelastic body and the restoring force of the restraining material. The force that tries to return to its original state works, making it more effective in stopping vibrations more quickly. A method in which a viscoelastic body is sandwiched between a substrate and a restraint material in this way is called a restraint-type vibration damping method. Restraint material A restraint material is a plate-like material that is tightly attached to the surface of a viscoelastic body opposite to the surface in contact with the substrate, and a material with relatively high rigidity is suitable for stopping the movement of a vibrating substrate. Constraint In the present invention, constraint refers to the phenomenon in which the vibrating substrate exhibits minute waving phenomenon when it is brought into close contact with a vibrating object through a viscoelastic material and is excited, and the viscoelastic material that is in close contact with the substrate is in close contact with the restraining material. For example, a slight difference in movement occurs between the restraining material and the substrate in the waving phenomenon. Therefore, since the viscoelastic body moves to follow both the movement of the substrate and the movement of the restraining material, shear stress is inevitably applied to the viscoelastic body. The object that causes this movement is the restraint material. Therefore, when the restraining material and the substrate are vibrated by the restraining material, they will be in exactly the opposite state, with the substrate acting as the restraining material and the restraining material acting as the base material. Although it is not possible to distinguish between the two, they are generally referred to as a restraining material and a substrate. (Function) The reason why the restraint-type damping floor member for direct attachment of the present invention has excellent floor impact sound mitigation performance is that the air-filled portion becomes an air bag and is easily compressed and deformed, and the viscoelastic body filled in the recess is a film. It adheres closely to the irregularities of the base material, restrains displacement during impact with a complex shape, and in addition to the impact energy absorption performance of the viscoelastic body itself, the deformation of the convex portion of the film that forms the air bag and the crosslinked viscoelastic body It is thought that the impact energy absorption performance was further increased by increasing the shear deformation portion. In addition, in terms of compression characteristics, when an impact is applied, the air bladder, which is a convex part of the film, is compressed, and the viscoelastic body is further compressed, so it easily deforms with a very small displacement, but under a constant load. For the above compression, the reaction force of the compressed air in the convex air bag,
Since the compressive reaction force of the crosslinked viscoelastic body acts and a larger force is required to increase the deformation, more displacement than necessary can be avoided.
Furthermore, when the compressive load is removed, the restoring force of the cross-linked viscoelastic body and the restoring force of the compressed convex air bladders are combined, resulting in a very quick recovery force. It was done. Furthermore, even though it is a crosslinked material, crosslinked viscoelastic materials tend to be susceptible to changes in hardness due to temperature changes, but at high temperatures, air expansion can suppress the decrease in compressive force due to the decrease in hardness of the viscoelastic material. Conversely, at a constant temperature, air contraction can suppress the increase in compressive strength due to increased hardness of the viscoelastic body, and there is also an advantage as a vibration damping floor member in that performance changes due to temperature changes are reduced. In addition, in terms of cost, since one side is a film, handling is very easy, and long length processing is also possible, which not only greatly reduces the number of man-hours, but also reduces the number of convex parts. Since the air sealing part does not require any material, it is possible to reduce the amount of material, which is suitable for cost reduction. Furthermore, by using expanded polystyrene as an uneven absorbing material, there is less sagging under heavy loads, the length is not long enough to provide stable performance for a longer period of time as a wooden flooring material, and it is difficult to transmit vibrations to the floor slab. , is very effective in alleviating floor impact noise.
Moreover, it is an inexpensive material and has very little cost increase, making it very useful. Next, the cross-sectional configuration of a floor using the restraint-type damping floor member for direct attachment of the present invention will be described. An example of the implementation of the present invention is shown in FIGS. 1 to 4. As shown in Fig. 1, a relatively rigid plate-like body is bonded to both sides of a cross-linked viscoelastic hollow film base material 2 using a wood flooring material 1 and plywood 3 as restraining materials, and then foamed polystyrene is further bonded. An example will be shown in which the absorbent material 4 is inserted between a floor slab 5 made of concrete or the like to absorb unevenness on the surface of the floor slab 5. Another example of the present invention, as shown in FIG. 2, is a case where a crosslinked viscoelastic hollow film substrate 2 and expanded polystyrene 4 are directly laminated together to be used as a constraint type vibration damping flooring material. An example will be shown in which a hollow film base material 2 with a crosslinked viscoelastic body is bonded to a wood flooring material 1 which is a component, and expanded polystyrene 4 is directly bonded to the lower part of the film base material 2 as an uneven absorbing material. Figure 3 shows a cross-linked viscoelastic hollow film substrate 2 bonded to a wooden flooring material 1 which is an upper floor constituent member as an upper restraining material, and a plywood 3 used as a lower floor constituent member to form a lower restraining material. The film base material 2
Glue it to the underside of the polystyrene foam 4
An example is shown in which a laminate of polyethylene foam and foamed polyethylene 8 is inserted between the floor slab 5 and the floor slab 5 as an uneven absorbing material. In Figures 1 to 3, 6 and 7 are real parts with unevenness provided at the ends, which partition both ends of the film base material 2 and seal air by sealing the convex part 2A of the film base material 2. It has been made possible. FIG. 10 shows a state in which the recess 2B of the film base material 2 is filled with a crosslinked viscoelastic body 18. FIG. 4 is a perspective view of what is shown in FIG. Further, the crosslinked viscoelastic body-attached film base material 2 has no problem whether the film surface is the upper surface or the lower surface. Alternatively, a film may be further bonded to the surface of the crosslinked viscoelastic material. 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 wood flooring made of mosaic parquet, natural wood decorative composite flooring, specially processed decorative composite flooring, natural wood decorative composite blocks, composite flooring consisting of specially processed decorative composite blocks, Examples include flooring made of sawn boards, board boards, cork, and laminated layers. For these, it is preferable to make the lamination thinner in order to alleviate floor impact noise. Specific examples of the restraining material include the aforementioned wooden flooring materials, plywood, compressed paper, plastic plates, thin metal plates,
Particle board, wood chip cement board, fiber board, pulp cent board, wood cement board, flexible board, soft flexible board, large flat board, asbestos cement board, asbestos cement perlite board, asbestos cement calcium silicate board, plaster board, etc. All of these can be used regardless of the presence or absence of decorative finishing on the surface and the presence or absence of holes as long as they are plate-shaped.
If the purpose is to reduce the total thickness of the floor constituent members, thin plates are desirable. In addition, the optimal thickness of expanded polystyrene 4 used as an unevenness adjustment material or as a part of an unevenness adjustment material is 5 mm to 60 mm, and the unevenness absorption performance and floor impact noise depend on the foaming ratio of expanded polystyrene, manufacturing method, etc. Although there are differences in relaxation performance, etc., if the thickness is selected appropriately, a general-purpose product can be sufficiently effective. In other words, in the case of a high foaming ratio, it is desirable to have a relatively thin thickness of 5 mm or more, considering unevenness absorption capacity, floor impact sound mitigation performance, compression denting, etc., and conversely, in the case of a low foaming ratio, it is desirable to have a relatively thin thickness. However, it is preferable to keep the height within 60mm as there will be less benefit in terms of eave height and ceiling height. In addition, for the purpose of improving workability and finish feel, unevenness can be provided on the surface where the uneven absorbing materials of expanded polystyrene 4 come into contact with each other, and the smoothness of the surface material can be further improved. It is possible to improve the effective bonding area by providing an uneven pattern on the bonding side of the bonding surface, and by adding improvements to the compression characteristics, it is possible to further improve the floor impact sound mitigation performance. Further, the polystyrene foam 4 as an uneven absorbing material may be used in the form of small pieces instead of having an uneven cross section. Also, when this is made into an uneven pattern or small pieces, the distance between the convex parts and between the small pieces is 1~
It is preferable to have constant or irregular intervals of 30 mm.
Further, the depth of the uneven groove portion of the uneven absorbing material is preferably 2 mm or more. In addition, when foamed polystyrene is used as a laminate with foamed polystyrene for uneven absorbent materials,
It is also possible to further improve the effect of mitigating floor impact noise. Specific examples include vulcanized rubber, non-vulcanized rubber, vinyl chloride, polyethylene, polypropylene, nylon, polyester, vinylidene chloride,
Examples include films and sheets made of ethylene-vinyl acetate copolymer and the like. Specific examples of cloth-like substrates include nylon, polyester, polypropylene, polyethylene, glass fiber, nonwoven fabrics and woven fabrics using asbestos, and/or natural fibers such as cotton and linen, and/or nylon, urethane, polypropylene, acrylic, and polyester. When using fibers, it is desirable to use fabrics that are as long and as thin as possible in order to reduce compression strain. Next, the crosslinked viscoelastic material will be explained. The cross-linked viscoelastic material referred to in the present invention is liquid at room temperature, and after reacting at room temperature, the cured product retains its shape even when heated to 80°C, and has a hardness of Nippon Rubber at 20°C. It is preferable that the hardness satisfies the condition of 50 or less on the C-type hardness tester specified in the association standard SRIS-0101. Examples of reaction controlling substances that can satisfy the above conditions include combinations of liquid rubbers having functional groups shown in Table 1 and crosslinking agents. These are
Easy to control curing speed with room temperature reactivity,
Considering cost, ease of acquisition, etc.
In particular, it has a hydroxyl group at the end, and the main chain is polybutadiene, hydrogenated polybutadiene, polybutadiene.
It is desirable to use nitrile, polybutadiene-styrene, isoprene, etc., polyether polyols, polyester polyols, urethane acrylic polyols, aniline derivative polyols, etc. alone or in combination. Further, as the curing agent for the wood-reactive substance, an isocyanate-based curing agent is suitable, and it is necessary that each molecule has two or more isocyanate groups. Specific examples thereof include toluylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorodiisocyanate, and prepolymers having terminal isocyanate groups, which can be used alone or in combination.
In addition, the isocyanate curing agent may be mixed with a plasticizer due to problems such as blending ratio and/or viscosity, but the plasticizer must be dehydrated.
It is necessary that it does not react with isocyanate compounds.

【table】

[Table] Although it is possible to obtain a crosslinked viscoelastic material that satisfies the present invention by combining only the essential components required to cause the room-temperature reaction described above, it is possible to obtain a crosslinked viscoelastic material that satisfies the present invention. By adding additives, 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, maleic 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, a plasticizer, etc. 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 can be cured to improve vibration damping properties, sound insulation properties, and flame retardancy, and can be used to adjust the blending ratio of the 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 air-filled film base material filled with the cross-linked viscoelastic material refers to a film base material having alternately air-filled convex portions and film-only recessed portions, as shown in Fig. 4. A perspective view of an example embodiment is shown. As the air-filled film base material, general-purpose products conventionally used as packaging materials are sufficient.
The ratio of the air volume of the hollow convex portion to the volume of the crosslinked viscoelastic material filled in the concave portions of the film alone is preferably a ratio of convex portions: concave portions = 2:8 to 8:2; concave portions: convex portions. When the number of convex portions is less than 2:8, the cost of raw materials increases and the restorability tends to deteriorate. On the other hand, if the number of convex portions increases from a ratio of convex portions to concave portions of 8:2, although the cost of raw materials decreases, there is a tendency that the risk of destruction of the air bag increases and the restorability tends to deteriorate. Further, the thickness of the film constituting the air enclosing portion is preferably about 20μ to 100μ. Further, the height of the convex portion is preferably 6 mm or less, and a more preferable range is 2 mm to 4 mm. Further, the volume of air per one convex portion is desirably 10 c.c. or less, and a more preferable range is 0.3 to 5 c.c. Further, the crosslinked viscoelastic material to be filled may be filled onto the convex portion, but in consideration of cost, it is better to have a thickness of 1 mm or less. On the other hand, if the filling height is less than 3/4 of the height of the convex part, it is not desirable because unless it is compressed from the beginning, the adhesion effect with the restraining material cannot be achieved and the adhesive strength is likely to be insufficient. . Furthermore, as the material constituting the film base material, films such as polyethylene, polypropylene, nylon, polyester, vinyl chloride, and vinylidene chloride can be used, but among them, polyethylene and polypropylene have the advantage of being easily available as general-purpose products, and chlorinated Vinylidene is a preferable material because it has excellent gas permeation resistance. Further, the shape of the air-filled convex portion can be any shape such as a columnar shape, a prismatic shape, a semicircular shape, or an elliptical shape. In addition, in order for the flooring material having the floor structure of the present invention to function as a wooden flooring material, it is possible to use a method that takes into account the level of the flooring material, such as by providing an uneven real part on the entire surrounding surface. Depending on the material used, it is aesthetically no different from regular wood flooring. (Example) Next, the present invention will be explained with reference to Examples and Comparative Examples. These are summarized in the table.

[Table] Test method (1) Prepare a base material according to the formulation examples shown in Examples and Comparative Examples, add and mix the specified curing agent, and apply it to a film base material having the indicated volume ratio of convex portions to concave portions. After filling and crosslinking, a crosslinked viscoelastic film was obtained. One side of the film obtained as above
Glued to 5.5mm thick wood composite flooring material,
Glue the remaining one side to 2.5mm thick plywood,
This was used as a common material for comparative examples. Next, Example 1 is 2.5
10mm thick polystyrene foam on one side of mm thick plywood
A 60x foam product was bonded as an uneven absorbent material. In Example 2, foamed polyethylene with a thickness of 2 mm and 30 times was further laminated on the lower surface of the uneven absorbent material of Example 1. Comparative Example 1 uses the uneven absorbent material of Example 1 with a thickness of 10 mm.
It is made of double-foamed polyethylene. (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) The 4 mm thick cross-linked viscoelastic film base material obtained in (1) above was created and pasted on top and bottom plywood boards of 2.5 ^tons each with dimensions of 4 mm x 50 mm x 50 mm, and compressed using a compression testing machine. Compress 50% at a speed of 2 mm/min, 30
After holding for a minute, the load was unloaded and the recovery property was checked after 10 minutes. ○ Those that showed recovery of 95% or more
95% or less is indicated by an x mark. (6) The relationship between the compressive stress and displacement of the air-filled film alone and the crosslinked viscoelastic film was compressed using a compression tester at a compression speed of 2 mm/min, and the displacement and compressive stress were determined from the obtained chart. The readings were graphed (see Figure 6). (7) The sample used in Examples 1 and 2 was 200 mm x 300 mm.
^{With the dimensions of} Measured and graphed. (Example 1 is the seventh
Embodiment 2 is shown in FIG. ) From the above, in Example 1, a crosslinked viscoelastic film was bonded between a 5.5 mm thick wood composite flooring material and a 2.5 mm thick plywood, and the above boards were used as an upper restraining layer and a lower restraining layer, respectively, and a 10 mm thick A foamed polystyrene layer is bonded to the remaining surface of the lower restraining layer as a non-contact absorbing material having vibration damping properties. In this case, the length is not such that the effect of the uneven absorbing material can be exerted and a good floor impact sound mitigation effect is produced, and the compression properties also show good resilience. Example 2 shows a case where 2 mm of foamed polyethylene was further bonded to the lower surface of Example 1. Figure 8 shows the number of days elapsed at room temperature of 22℃ to 27℃ in this case.
Shows the long-term dent test results when held for 20 days or more. Similar to Example 1, Example 2 does not have a length that exhibits the effect of mitigating floor impact noise, and good results were obtained in the long-term load dent test, indicating that it exhibits sufficient performance as a wood-finished flooring material. I understand. Comparative Example 1 shows a case where foamed polyethylene with a thickness of 2 mm was used as the uneven absorbent material without using foamed polystyrene. Although the floor impact noise mitigation effect is excellent, there is still room for further improvement in order to obtain even higher effects. Comparative Example 2 is an example in which the thickness of the foamed polyethylene, which is the uneven absorbing material in Comparative Example 1, is increased from 2 mm to 10 mm, and the thickness is increased from 2 mm to 10 mm. An example in which the thickness is further increased is also shown. Compared to Comparative Example 1, although it shows a higher effect in the high frequency range of 1kHz or higher, the grade of floor impact sound is mainly affected by the amount of improvement in the 125Hz, 250Hz, and 500Hz areas, so the grade of floor impact sound is As with the 2mm thick product, it was graded L-55, and the grade could not be improved. Therefore, this was beyond the purpose of the present invention. As shown in Examples 1 and 2, the floor structure shown in Comparative Example 1, in which the uneven absorbent material was replaced with expanded polystyrene, had a very large effect, making it even more comfortable for residents on the lower floor. This is close to a livable level. The graph shown in Figure 6 compares the air-filled film base material alone and the film base material with cross-linked viscoelastic material, and it shows that in the range where the displacement is smaller than that of the film alone, almost no compressive load is required. , indicating that it is necessary to add a large compressive strength to provide a large displacement. In other words, it can be said that it has ideal compressive properties as a floor material for mitigating floor impact noise. FIGS. 7 and 8 show how the flooring material of the present invention undergoes changes due to long-term loads. Although the load values were varied by point loads, it can be said that this flooring material has sufficient load-bearing properties, judging from the materials used in ordinary housing complexes. 9A, B, and C are cross-sectional views showing the relationship between the damping plate of the restraining plate and the substrate in the embodiment of the present invention. FIGS. 10A and 10B are cross-sectional views of a film base material whose recesses are filled with a crosslinked viscoelastic material. (Effect of the invention) As mentioned above, according to the present invention,
The restrained vibration damping layer disclosed in No. 253866 utilizes the compression characteristics of the enclosed air layer and the compression characteristics of the crosslinked viscoelastic body, and by increasing the adhesion surface area due to the complex shape, vibration damping of the restrained vibration damping material is achieved. Performance can be demonstrated more efficiently. By replacing part of the crosslinked viscoelastic material of the raw material with an air layer in the convex portion of the film, it has become possible to reduce costs. By keeping the total thickness of the damping floor members thin, it is possible to suppress the height of the building's eaves, which has a great effect on lowering construction costs. In addition, the blocking effect can be utilized by the air layer in the convex portion of the film. Furthermore, by using the uneven absorbing material with a vibration damping function using expanded polystyrene according to the present invention, it is possible to further reduce floor impact noise. The present invention, which enables flooring to be finished at low cost, has great industrial utility value.

[Brief explanation of the drawing]

FIG. 1 is a construction sectional view of an example product of the present invention. FIG. 2 is a cross-sectional view of a product according to an embodiment of the present invention, in which the finishing material is an upper restraining material and the lower restraining material is an uneven absorbing material made of foamed polystyrene having a vibration damping function. FIG. 3 is a construction sectional view of an example product of the present invention, and is a diagram showing an example in which two types of uneven absorbing materials, foamed polystyrene and foamed polyethylene, are used in combination. FIG. 4 is a perspective view showing an example of the restraint-type damping floor member for direct attachment of the present invention. FIG. 5 is an explanatory diagram showing an apparatus used to measure floor impact sound. FIG. 6 is a diagram showing compression characteristics with and without a crosslinked viscoelastic body according to the present invention. FIG. 7 is a characteristic diagram showing the relationship between long-term point load and dent depth in Example 1 of the present invention. FIG. 8 is a second embodiment of the present invention.
It is a characteristic diagram showing the relationship between long-term point load and dent depth in the case of. FIGS. 9A, B, and C are cross-sectional views showing the relationships among the restraining plate, damping plate, and substrate in an embodiment of the present invention. FIGS. 10A and 10B are cross-sectional views of a film base material whose recesses are filled with a crosslinked viscoelastic material. 1...Wood flooring (upper restraining material), 2...
... Film base material with crosslinked viscoelastic material, 3 ... Plywood (lower restraint material), 4 ... Polystyrene foam, 5 ... Floor slab, 6 ... Real part, 7 ... Real part, 8 ... Polyethylene foam , 9... Sound source room, 10... Tapping machine, 11... Sample, 12... Floor slab, 13... Sound receiving room, 14... Microphone, 15... Precision sound drive meter, 16... Frequency analysis vessel, 17... level recorder, 18... crosslinked viscoelastic body, 2A... convex part,
2B...Concavity.

Claims (1)

[Claims] 1. A film base material in which convex portions and concave portions are alternately arranged is interposed between an upper floor component and a lower floor component that serve as at least a restraining material, and the film base material In the direct bonding type vibration damping floor member whose ends are partitioned by real parts, the film base material encloses air in its convex portions, and the film base material has a cross-linked viscoelastic material in the concave portions or the entire surface of the concave portions including the convex portions. An air-filled film with a cross-linked viscoelastic body filled with a resin is inserted between the upper and lower floor constituent members, and a film with a thickness of 5.
A restraining type vibration damping floor member for direct attachment, characterized in that it is provided with an uneven absorbing material made of expanded polystyrene with a thickness of at least 60 mm to 60 mm. 2. The restraining vibration damping floor member for direct attachment according to claim 1, wherein the uneven absorbing material is made of only foamed polystyrene or a laminate of foamed polystyrene and foamed polyethylene. 3. The crosslinked viscoelastic material that fills the entire surface of the recesses including the recesses or projections of the film base material undergoes a curing reaction at room temperature, and the product after the curing reaction retains its shape even when heated to 80 ° C. The restraint type for direct application according to claim 1, which satisfies the three conditions that the hardness is 50 or less on the C-type hardness tester specified in the Japan Rubber Association standard SRIS-0101 at 20°C. Vibration damping floor components. 4 In a film base material in which convex portions and concave portions are formed alternately, the ratio of the volume of air in the convex portions containing air to the volume of the crosslinked viscoelastic body filled in the concave portions is the convex portion:concave portion. = 2:8 to 8:2, the height of the convex portion is 6 mm or less, and the crosslinked viscoelastic body filling only the concave portion or the entire surface of the concave portion including the convex portion is a telechelic polymer having a hydroxyl group at the end. The direct adhesive product according to claim 1, which is obtained by subjecting a main ingredient as a basic component to a curing reaction at room temperature with a curing agent having two or more isocyanate groups per molecule. Restraint type vibration damping floor member. 5 The crosslinked viscoelastic material filled only in the recesses of the film base material, in which convex portions containing air and recessed portions containing only the film are arranged alternately, or the entire surface of the recesses including the convex portions, is made of hydroxyl group-terminated liquid polybutadiene, asphalt, etc. The product according to claim 1, characterized in that it is obtained by subjecting a main ingredient containing a plasticizer as a basic component and a curing agent having two or more isocyanate groups per molecule to a curing reaction at room temperature. Paste restraint type vibration damping floor member. 6 A film base material in which convex portions and concave portions are alternately arranged between an upper floor component and a lower floor component that serve as at least a restraining material, and air is sealed in the convex portions, and the film base material is In a restraining type vibration damping floor member for direct attachment, in which the ends of a film base material are partitioned by a real part and are made by filling the entire surface of a recess including a recess or a convex part with a crosslinked viscoelastic material, 5 mm is placed on the underside of the film base. ~60
A restraining vibration damping device for direct attachment, characterized by forming grooves with a depth of 2 mm or more in polystyrene foam and attaching an uneven absorbing material with an uneven cross section as a lower floor component to form an integrated floor component. floor parts.