JPH11348182A - Laminated rubber structure and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vibration-proof laminated rubber structure having a small horizontal spring constant and a large vertical spring constant. SOLUTION: In a laminated rubber structure constituted of a hard plates 1 and rubbery layers 2, uneven parts are formed to the adhesive surface of the rubbery layers 2 among the hard plates 1 and vibration-proof characteristics are improved by an increase in contact area. The uneveness degree of the uneven parts is set so that the ratio A/AO of the contact area is 1.01-4.0 when the contact area with the hard plate 1 free from uneveness with each rubbery layer 2 is set to AO and the contact area A of the uneven surface of the hard plate 1 with the rubbery layer 2 is set to A and the hard plate 1 can be constituted of a thermoplastic resin (polyphenylene ether resin and a polyamide resin with an amino group content of 30-200 milli mole/kg) or a compsn. thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated rubber structure and a method for manufacturing the same, and relates to a rubber bearing for buildings, a rubber bearing for bridges, a rubber bearing, a ground bearing, a vibration isolating rubber for automobiles and train cars, and the like. The present invention relates to an improvement in a laminated rubber structure that can be used and is particularly used as a seismic isolation rubber for light-weight detached houses.

[0002]

2. Description of the Related Art A laminated rubber structure composed of rubber and a hard plate is used as a seismic isolation rubber or a rubber bearing used for a building, a bridge, or the like.

[0003] Such a laminate of a rubbery layer and a hard plate has a low elastic modulus to a horizontal force, similar to that of rubber alone. In addition, the rubber has a considerably higher elastic modulus than the rubber, because the rubber is fixed at the interface with the hard plate by bonding with respect to the force in the vertical direction. Due to such characteristics, a laminated body of rubber and a hard plate is extremely useful as a base for so-called seismic isolation [for example, see “Introduction to Seismic Isolation Rubber” (edited by Japan Seismic Isolation Structural Association, Ohmsha)] .

By using a laminated body of rubber and a hard plate (hereinafter sometimes referred to as a laminated rubber) as the seismic isolation rubber, the horizontal vibration input from the ground due to an earthquake or the like, that is, the wave is extended. By doing so, it shakes slowly and greatly, thereby avoiding damage from the earthquake.

[0005] However, when the entire building shakes up and down and right and left, that is, a state called "dancing", the seismic isolation effect is not sufficient. That is, the laminated rubber used as the seismic isolation rubber needs to have a sufficiently large vertical spring constant together with a sufficiently small horizontal spring constant. However, in general, when soft rubber is used, the thickness of the laminated rubber is increased, or the number of laminated layers is increased in order to reduce the horizontal spring constant, the vertical spring constant also decreases.
Therefore, in order to produce a laminated rubber having sufficient performance, there are many restrictions on the type of rubber and the laminated structure.

[0006] Further, for a building having a small building weight such as a single-family house, a laminated rubber having a smaller horizontal spring constant is required, but a small horizontal spring constant is required. And a large vertical spring constant are difficult to achieve.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a laminated rubber structure having a small rigidity in a horizontal direction and a large rigidity in a vertical direction (lamination direction), and a method of manufacturing the same. It is another object of the present invention to provide a laminated rubber structure capable of improving vibration isolation characteristics regardless of the type of a hard plate or rubber, and a method of manufacturing the same.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object. As a result, when the surface of a hard plate is roughened to increase the contact area with a rubbery layer, the vibration isolation characteristics are reduced. The present inventors have found that the present invention can greatly improve the rigidity in the horizontal direction and the high rigidity in the vertical direction, and completed the present invention. That is, the laminated rubber structure of the present invention is a laminated rubber structure composed of a hard plate and a rubbery layer,
One of the hard plates is formed on at least one of the surfaces bonded to the rubber layer. The hard plate can be made of a hard resin layer, for example, a thermoplastic resin (for example, a polyphenylene ether resin and a resin having an amino group) or a composition thereof, or may be made of a metal. The hard resin layer includes a resin composition containing 0 to 30 parts by weight of polyalkenylene and 0 to 30 parts by weight of a styrene-based polymer with respect to 100 parts by weight of the polyphenylene ether resin.
It may be composed of a resin composition containing 0 to 150 parts by weight with respect to 00 parts by weight. According to the method of the present invention, a laminated rubber structure can be manufactured by laminating a hard plate having an uneven portion on at least one surface and a rubbery layer.
The present invention also includes a method for using the laminated rubber structure and a vibration isolation method using the laminated rubber structure.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The laminated rubber structure of the present invention has a structure in which a hard plate and a rubber layer are laminated. For example, a laminated rubber structure having a structure shown in FIG. 1 is used. This structure comprises a hard plate (hard resin plate or the like) 1 and a rubbery layer 2.
Are alternately stacked, and the hard plate 1 is located on both upper and lower surfaces. The structure of the structure is not limited to the structure shown in FIG. 1, and may be a structure in which a hard plate and a rubbery layer are alternately stacked one by one, or a structure in which they are randomly stacked. Good. Further, the structure of each layer is not particularly limited. For example, a laminated rubber obtained by vulcanizing or bonding different kinds of rubbers with an adhesive may be interposed between hard plates, or a plywood (laminated layer) formed of different kinds of hard plates Hard plate) may be used as one hard plate. When considering the laminated rubber as one rubbery layer and the laminated hard plate as one hard plate, the thickness of each can be selected from the range of about 0.5 to 20 mm. When the thickness of the rubbery layer is too thin, flexibility is not exhibited, and when it is too thick, strength may be disadvantageous. If the thickness of the hard plate is too small, the strength is reduced. If the thickness is too large, the height of the entire laminated rubber structure becomes too large, and the installation may be difficult. Further, the plurality of hard plates and / or rubber layers of the laminated rubber structure may be formed of the same material or different materials. For example, the plurality of hard plates may be formed of a composite plate of different types of hard plates (for example, a metal plate and a resin plate), and the plurality of rubber layers may be formed of different types of rubber.

A feature of the present invention is that the surface of a hard plate (a hard resin layer or the like) is roughened to form an uneven portion, thereby increasing the contact area between the rubbery layer and the hard plate, thereby improving the vibration isolation characteristics. The point is to improve. In the laminated rubber structure of the present invention, an uneven portion is formed on at least one surface of the hard plate. The uneven portion may be formed on only one side of the hard plate, or may be formed on both surfaces, and when using two or more hard plates, it may be formed on one or both surfaces of at least one hard plate. It may be formed on one or both sides of two or more hard plates.

[Hard plate] The uneven portion formed on the laminated surface of the hard plate and the rubber layer may be formed at random.
It may be formed regularly. When the irregularities are formed regularly, they may be formed as a pattern.

The degree of the concavo-convex processing can be selected within a range that does not impair the adhesion to the rubber layer. For example, the contact area between the flat hard plate not subjected to the concavo-convex processing and the rubber layer is defined as A
0, the contact area between the hard plate and the rubber layer subjected to the unevenness processing (when using an adhesive for bonding the hard plate and the rubber layer, the contact area between the adhesive layer and the rubber layer) If A
The contact area ratio A / A0 is, for example, 1.01 to 4.0, preferably 1.1 to 3.5, and more preferably 1.2 to 2.0.
It is about 0. If the contact area ratio A / A0 is less than 1.01, the vibration isolating characteristics are not significantly improved. If the contact area ratio A / A0 exceeds 4.0, the horizontal spring constant as well as the vertical spring constant becomes unnecessarily large. Performance tends to decrease. The contact area can be determined by, for example, measuring the surface state with a three-dimensional surface roughness meter and calculating the surface area.

The size (average diameter, height and depth) and density of the concave and convex portions can be appropriately selected from the range in which the above-mentioned contact area ratio can be obtained. Average diameter of irregularities (height and depth)
Is, for example, 0.01 to 3 mm (preferably 0.05 to
2 mm, especially 0.1 to 1 mm), and the average density of the uneven portions is, for example, 1 to 50 / cm ² , preferably 2
It may be about 30 / cm ² .

The longitudinal cross-sectional shape of the uneven portion of the hard plate is not particularly limited, and may be, for example, a polygonal shape (a polygonal shape such as a triangle or a quadrangle), a curved shape (a circular shape, an elliptical shape, etc.), or an amorphous shape. Well, these cross-sectional shapes may be mixed,
It may be formed as a fine rough surface. In the uneven portion, a portion from the concave portion to the convex portion or from the convex portion to the concave portion may have an acute angle (edge), but is preferably smooth. It is not preferable to form an acute angled uneven portion because the rubber may be broken from the acute angled portion.

Further, the uneven portions may be formed regularly or irregularly, and may form a pattern. The pattern can be formed according to the shape of the hard plate. A generally used hard plate is often in the shape of a disk, a square plate (square plate) or a donut. In a disk-shaped hard plate, a pattern symmetrical with respect to its center point (for example, a concentric or ring-shaped pattern,
In the case of a rigid plate having a rectangular plate shape (square plate shape), a pattern symmetrical with respect to an intersection of diagonal lines (for example, a projection pattern arranged in a radial pattern from the intersection) may be used. In a doughnut-shaped hard plate, lead or the like may be arranged or inserted into a central hole (opening) for attenuation of seismic energy or the like. Further, as the material for the hard plate, metal or hard resin can be used. As the metal, a steel plate, particularly a non-corrosive metal (for example, a steel plate such as stainless steel (eg, SS400)) is preferable. Preferred resins are thermoplastic resins (such as hard and tough resins),
Particularly, it is a polyphenylene ether resin (A) or a resin (B) having an amino group. Poly (2,6-dimethyl-1,4-phenylene ether) is particularly preferred as the resin (A), which can be obtained, for example, by polymerizing 2,6-xylenol in the presence of a catalyst. .

In a resin composition containing a thermoplastic resin,
The polyphenylene ether resin (A) may be used in combination with, for example, polyalkenylene, polyolefin, styrene-based polymer and the like. As polyalkenylene, for example,
Examples thereof include polyoctenylene and polypentenylene. Polyalkenylene is described, for example, in KJ Kevin, T. Saegusa, "Ring-Opening Polymerization"
Volume 1, Elsevier Appl. Sci. Publishers, London, p.
121-183 (1984). Examples of the polyolefin include polyethylene, polypropylene, ethylene-propylene copolymer, and poly (4-methylpentene-1). As the styrene-based polymer, for example, an aromatic vinyl monomer (styrene, etc.) alone or a copolymer (polystyrene, α-methylstyrene polymer, etc.), a styrene-butadiene copolymer (random, graft or Block copolymer), polymer of vinylbenzyl alcohol (o-, m-, or p-hydroxymethylstyrene), styrene-maleic anhydride copolymer, styrene- (meth) acrylic acid copolymer, styrene- ( Examples thereof include a (meth) acrylate copolymer, an acrylonitrile-styrene copolymer (AS resin), and an acrylonitrile-butadiene-styrene copolymer (ABS resin). The resin composition containing the polyphenylene ether resin (A) is based on 100 parts by weight of the polyphenylene ether resin (A),
It is about 30 parts by weight (preferably 1 to 30 parts by weight) and about 0 to 30 parts by weight (preferably 1 to 20 parts by weight) of the styrene polymer.

The resin (B) having an amino group has an amino group (particularly, a terminal amino group) reactive with a carboxyl group or an acid anhydride group. The concentration of the amino group in the thermoplastic resin (B) is, for example, 30 to 200 mmol / mol.
kg, preferably about 50 to 150 mmol / kg. The thermoplastic resin having such an amino group includes various polyamide resins, for example, nylon 6, nylon 6
6, Nylon 610, Nylon 612, Nylon 46, aromatic polyamide (MXD-6 obtained by reaction of metaxylylenediamine with adipinesan, polyamide obtained by reaction of trimethylhexamethylenediamine with terephthalic acid, etc.), PA6NDT / INDT, PAPAC
M12 etc. can be illustrated. Preferred polyamide resins are
Nylon 46, Nylon 66, Nylon 610, Nylon 612, MXD-6, PAPACM1210 and the like. The polyamide resin can be obtained by, for example, polycondensation of a diamine and a dibasic acid, ring-opening polymerization of a lactam, and the like. Note that a hard resin layer composed of a resin having an amino group and a rubber layer composed of a rubber polymer having a reactive group (for example, a carboxyl group or an acid anhydride group) for the amino group are used. When combined, the adhesion strength between the hard resin layer and the rubbery layer can be significantly improved.

The hard plate may be composed of the metal or the thermoplastic resin alone, or may be composed of a resin composition containing the thermoplastic resin. Further, the hard plate may be constituted by a laminate of a metal and a thermoplastic resin or the resin composition. Further, the thermoplastic resin may include a filler. Examples of the filler include a fibrous filler or a fibrous reinforcing agent (metal fiber, glass fiber, carbon fiber, whisker, etc.), a flaky filler (mica, talc, montmorillonite, etc.), and a particulate filler (calcium carbonate, titanium oxide, Carbon black). The content of the filler can be selected from the range of about 0 to 150 parts by weight based on 100 parts by weight of the thermoplastic resin, depending on the type of the thermoplastic resin. Usually, the content of the filler is 1 to 5
0% by volume (for example, 1 to 40% by volume), preferably 5 to
It is about 30% by volume, more preferably about 10 to 20% by volume.

The elastic modulus of the hard plate is, for example, 15
0 t / cm ² or more (for example, 200 to 1000 t / cm
² ), preferably 400 t / cm ² or more (for example, 40 t / cm ² ).
0 to 800 t / cm ² ), more preferably 500 t / cm ²
cm ² or more (for example, 500 to 800 t / cm ² ).

The hard plate contains various additives such as stabilizers (heat stabilizers, antioxidants, light stabilizers such as ultraviolet absorbers, etc.), coloring agents, plasticizers, flame retardants and the like. Is also good. The thickness of the hard plate can be selected according to the desired vibration damping characteristics, the number of layers, and the like, and is, for example, 0.5 to 20 mm, preferably 1 to 15 mm, and more preferably 2 to 10 mm.
(For example, 3 to 7 mm). The size of the hard plate other than the thickness can be selected according to the application such as a building or a bridge.

The uneven portion of the hard plate can be formed by a conventional method according to the material of the hard plate.
Examples of the unevenness processing on the surface of the metal hard plate include formation of a concave portion by etching, drilling, and the like. in this case,
The effect of strengthening the adhesion between the rubber and the metal plate by the anchor effect is also obtained. The uneven portion on the surface of the hard resin plate may be formed by molding the hard resin in a molding process such as injection molding, extrusion molding, vacuum molding, or a processing process such as hot pressing. It may be formed by performing unevenness processing or rough surface processing.

[Rubber Layer] The type of rubber used for the laminated rubber is not particularly limited. For example, natural rubber (NR), isoprene rubber (IR), butadiene rubber, styrene-butadiene rubber (SBR), chloroprene rubber ( CR), nitrile rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPM), ethylene-propylene-diene terpolymer (EPDM), ethylene acrylic rubber (ethylene-acrylic acid and acrylate copolymer) Coalescing (EA
M)), acrylic rubber, polynorbornene rubber, silicone rubber, urethane rubber, fluoroelastomer, thermoplastic elastomer (eg, polyester elastomer, polyether elastomer, polyolefin elastomer, polyamide elastomer). These rubbers can be used alone or in combination of two or more.

The rubber may be a rubber into which an acid component such as a carboxyl group is introduced by copolymerization or graft polymerization. Examples of the rubber into which an acid component has been introduced include, for example, an ethylene-propylene copolymer (x-
EPM), ethylene-acrylic acid and acrylate copolymer (EAM), acrylic rubber obtained by copolymerizing an acid component, nitrile rubber obtained by copolymerizing an acid component (x-NBR), and the like. Examples of the acid component include polymerizable monomers having a carboxyl group or an acid anhydride group such as (meth) acrylic acid, maleic anhydride, and fumaric acid. The amount of the acid component introduced is, for example, 0.1 to 20% by weight, preferably 1 to 15% by weight, more preferably 2 to 2% by weight in terms of the polymerizable monomer.
It may be about 10 to 10% by weight.

When the polyphenylene ether resin (A) is used as the hard plate, natural rubber (NR), styrene-butadiene rubber (SBR), ethylene-propylene-diene terpolymer (EPDM), acid component (Ethylene-propylene copolymer (x-EP
When at least one rubber selected from M), ethylene-acrylic acid and acrylate copolymer (EAM)) is used, the rubbery layer can be firmly bonded to the hard plate without using an adhesive.

When the amino group-containing resin (B) is used as the hard plate, a rubber containing an acid component (an ethylene-propylene copolymer (x-EP
M), a nitrile rubber (x-NBR) copolymerized with an acid component), and at least one rubber selected from fluororubbers, the hard plate and the rubbery layer can be firmly bonded without using an adhesive. Can be adhered to.

These rubbers have various additives, for example,
Thermoplastic resin, thermosetting resin, filler (glass fiber, carbon fiber, carbon black, etc.), vulcanizing agent (sulfur-containing compound, peroxide, metal oxide, etc.), crosslinking agent, vulcanization accelerator, vulcanization Accelerators, activators, scorch inhibitors, stabilizers (antiaging agents, antioxidants, antiozonants, ultraviolet absorbers, light stabilizers), mastication accelerators, tackifiers,
Plasticizer, rubber softener, rubber reinforcing agent, filler, reinforcing agent, foaming agent, foaming aid, lubricant, slip agent, internal release agent, antifogging agent, flame retardant, antistatic agent, denaturant, coloring agent , A coupling agent, a preservative, a fungicide and the like may be added.

The rubbery layer is usually composed of vulcanized rubber or a composition thereof. The thickness of the rubbery layer is usually 0.5
It is about 30 mm (for example, 0.5 to 20 mm), preferably about 1 to 20 mm, and more preferably about 3 to 15 mm (for example, 3 to 10 mm). For sizes other than thickness,
It can be selected according to the application such as building and bridge.

In the laminated structure of the hard plate and the rubbery layer,
The number of laminations of each layer is not particularly limited. For example, the total number of laminations is 3 to 100, preferably 3 to 4 depending on the thickness of each layer.
50, more preferably 3 to 30 (for example, 3 to 20)
You can choose from a range of degrees. In the laminated structure, hard plates are usually located on both upper and lower surfaces, but the hard plates on the upper and lower surfaces may be replaced with hard plates such as hard metal plates and ceramic plates.

The laminated rubber structure may have a flange for facilitating attachment to a vibration-isolated structure (building) or its foundation. It is sufficient that at least one flange is formed at an appropriate position of the laminated rubber structure, and usually, it is often formed on upper and lower hard plates. The flange may be formed integrally with the structure, and the flange may be attached to the hard plate or may extend from the hard plate as a flange.

[Production Method] The laminated rubber structure can be produced by laminating a rubber layer on a hard plate. In addition, it is also possible to use vulcanized rubber provided with irregularities by processing so as to obtain close contact with a hard plate having irregularities (a metal plate or a resin plate). It may be possible to fit tightly corresponding to the uneven portion of the hard plate. that time,
If necessary, the hard plate and the rubbery layer may be bonded using an adhesive. In a preferred method, a laminated rubber structure is manufactured by laminating an unvulcanized rubber layer on a hard plate and vulcanizing the unvulcanized rubber layer. That is, the rubber or the rubber composition is brought into contact with the uneven surface of the hard plate in an unvulcanized state, and is vulcanized (particularly, heated and vulcanized), thereby firmly bonding to the hard plate. Therefore, a laminated structure can be obtained in a very simple process of laminating a predetermined number of hard plates and a predetermined number of unvulcanized rubbery layers, and vulcanizing the unvulcanized rubbery layer by applying heat and pressure. .

When the hard plate is a hard resin plate, the bonding mechanism is considered to be mainly the formation of chemical bonds at the interface between the hard plate and the rubbery layer or the diffusion of components of each layer. When the component constituting the rubber and the component constituting the thermoplastic resin of the hard plate are common or similar (or when the rubber and the thermoplastic resin have affinity or compatibility), one layer (for example, rubber It is likely that common or similar components (components having affinity or compatibility) among the constituent components of the material layer) diffuse and adhere to the other layer (for example, a hard plate). For example,
An unvulcanized rubbery layer having a styrene segment, (A)
In combination with a hard resin plate composed of polyphenylene ether resin or its composition, the bonding mechanism is:
It is presumed that the styrene segment of the rubber diffuses into the hard plate containing (A) the polyphenylene ether resin, and both layers adhere. Therefore, in such a combination, high adhesive strength can be obtained even when a sulfur-based vulcanizing agent (sulfur or a sulfur-containing compound) is used as the vulcanizing agent. Further, in the above combination, when using a peroxide as a vulcanizing agent,
A chemical bond is generated between the rubbery layer and the hard plate, and the adhesive strength can be greatly improved. Furthermore, even when the constituents of the rubber and the constituents of the thermoplastic resin of the hard plate (hard resin layer) do not have an affinity or compatibility, by using a peroxide as a vulcanizing agent, In addition, a chemical bond is generated at the interface between the rubber layer and the hard plate, and the adhesive strength can be improved. INDUSTRIAL APPLICABILITY The laminated rubber structure of the present invention has high rigidity in the vertical direction and low rigidity in the horizontal direction, and thus is useful as seismic isolation rubber for various types of vibration-isolated structures (buildings). For example, buildings, bridges, rubbers It can be used for bearings, ground bearings, vibration isolation of cars and train cars, etc. In a building, a bridge, a rubber bearing, and a ground support, a laminated rubber structure can be fixed to each foundation in a form that supports a building or the like. It may be used between the support column and the support column, or may be used at an appropriate position in the axial direction of the support column, or may be used as the foundation of the support column. In the case of a motor vehicle, it can be used as a substitute for a portion where a spring is conventionally used, and in this case, the upper and lower portions of the laminated rubber structure are fixed and used. Further, if necessary, flanges for attaching to the base of the vibration-isolated structure (building) and an arrangement site such as the building side may be formed or attached to the upper and lower portions of the laminated rubber structure.

[0032]

According to the present invention, since the adhesion between the hard plate and the rubbery layer is improved by the unevenness, the rigidity in the horizontal direction is small and the rigidity in the vertical direction (laminating direction) is large. Can be obtained. Further, regardless of the type of the hard plate or the rubber, the vibration damping property can be improved, and the degree of freedom in the laminated structure such as the laminated rubber thickness and the number of laminated layers can be increased. Further, even if the hard plate is made of plastic, the horizontal spring constant can be reduced and the vertical spring constant can be improved.

[0033]

EXAMPLES The present invention will be described below in more detail with reference to Examples, but the present invention is not limited to these Examples. The following materials were used in Examples and Comparative Examples.

[Hard plate] (1) PPE (polyphenylene ether resin containing 20% by weight of glass fiber): VESTORAN1900-GF2 manufactured by Huls
0, elastic modulus 560 t / cm ² (2) PA612 (Nylon 6 containing 20% by weight of glass fiber)
12): manufactured by Huls, VESTAMID X 7099, elastic modulus 550
t / cm ² (3) Steel plate-1: SS400, elastic modulus 2100 t / cm ^{2 Using the} above-mentioned material, a disc-shaped hard plate (diameter 70 cm, thickness 70 μm) having irregularities of the following patterns (A) to (D) 3.5m
m) was prepared. (A): smooth surface without unevenness processing (B): 1,000 convex portions (1/4 sphere having a diameter of 1.0 cm) are uniformly and symmetrically scattered from the center of the disk. Area ratio SB / SA = 1.05 (C): 4000 convex portions (1/4 spheres with a diameter of 0.5 cm) are uniformly and symmetrically scattered from the center of the disk. Area ratio SC / SA = 1.20 (D): 2,900 convex portions (1/2 spherical with a diameter of 0.5 cm) are uniformly and symmetrically scattered from the center of the disk. [Rubber composition] (1) NR / SBR: Defo 1000 (NR)
80% by weight, SBR1500 (SBR) 20% by weight
4 parts by weight of zinc white, 59 parts by weight of carbon black N772, 1 part by weight of stearic acid,
Additive [VULKANOX HQ (manufactured by Bayer) 1.2 parts by weight, VULKANOX 4020 (manufactured by Bayer) 2 parts by weight, Ozone Guard G (Kawaguchi Chemical) 2 parts by weight, RHENOGRAN CBS80
(2 parts) X-NBR: Nippol (Bayer) 0.8 parts by weight, VULKALENT E (Bayer) 0.2 part by weight, RHENOGRAN S 80 (Bayer) 5 parts by weight] (Nipol) 1472 (manufactured by Zeon Corporation) 100 parts by weight, carbon black N990 50 parts by weight, titanium oxide 3 parts by weight, additive [VULKANOL 88 (manufactured by Bayer) 15 parts by weight, triallyl isocyanurate (Degussa) 1.5 parts by weight, TRIGONOX
17/40 (manufactured by Akzo) 6 parts by weight].

Examples 1 to 7 and Comparative Examples 1 to 3 In Examples and Comparative Examples, the hard plate and the rubber composition were combined as shown in Table 1, and the thickness of the rubbery layer was 7 mm.
A laminated rubber structure having 17 laminated layers with a hard plate was prepared.
When the hard plate is PPE, the unvulcanized rubber composition is sandwiched between the hard plates, and the temperature is 170 ° C. and 200 kgf / c.
Bonded by hot pressing at m ² for 35 minutes. Further, when the hard plate is PA612, the unvulcanized rubber composition is sandwiched between the hard plates, and 195 ° C., 200 kgf / cm
Bonding was performed by hot pressing at 35 for ² minutes. Furthermore, when the hard plate was steel plate-1, the rubber was vulcanized and then bonded with a two-part adhesive.

The characteristics of the obtained laminated rubber structure were evaluated as follows. Respect Vertical evaluation of frequency fV] laminated rubber structure, applying a surface pressure of 60 kgf / cm ² by a hydraulic press machine, to calculate the vertical spring constant KV from the displacement. From this vertical spring constant, the vertical frequency f
V was calculated. fV = 1 / 2π × (KV · g / 230790) ^0.5 The frequency fV in the vertical direction is generally considered to be preferably 15 Hz or more. Therefore, the vertical damping performance was evaluated based on the following criteria. A: fV is 19 Hz or more B: fV is 17 Hz or more and less than 19 Hz C: fV is 15 Hz or more and less than 17 Hz D: fV is less than 15 Hz [Evaluation of surface pressure dependency of rigidity in horizontal direction] Laminated rubber obtained by the above method against structures, pressured with 60 kgf / cm ² intervals until 0~300kgf / cm ² by a hydraulic press. At the time of pressurization, a force was applied in the horizontal direction on the upper part of the laminated rubber structure to apply ± 100% strain.
The strain was measured with a Tensilon universal tensile tester manufactured by Orientec. Then, the horizontal rigidity, that is, the horizontal spring constant, was calculated as the average value of the rigidity obtained from the slopes of the stress-strain curves in the outward and return paths in the horizontal direction. Then, the surface pressure dependency of the horizontal rigidity was evaluated based on the following criteria. A: The decrease rate of the horizontal spring constant due to the increase in the surface pressure is 10%
Below B: 20% reduction rate of horizontal spring constant due to increase in surface pressure
Below C: The rate of decrease in the horizontal spring constant due to the increase in surface pressure is 20%
[Evaluation of Horizontal Frequency fH] In the evaluation of the surface pressure dependence of the rigidity in the horizontal direction, the horizontal spring constant KH at a surface pressure of 60 kgf / cm ² is calculated, and the horizontal frequency fH is calculated by the following equation. Was calculated. fH = 1 / 2π × (KH · g / 230790) ^{0.5 In} general, it is considered that fH is preferably 0.5 or less. Therefore, the horizontal damping property was evaluated based on the following criteria. A: less than 0.4 B: 0.4 or more and less than 0.5 C: 0.5 or more The results are shown in Table 1.

[0037]

[Table 1] As is clear from Table 1, in the present invention, the rigidity in the horizontal direction can be reduced and the rigidity in the vertical direction can be increased without changing the load and the total size of the laminated rubber structure. Therefore, restrictions on the shape and material of the hard plate and rubber, and further, the laminated rubber structure can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the structure of a laminated rubber structure.

[Explanation of symbols]

 1: Hard plate 2: Rubber layer

Claims (24)

[Claims] 1. A laminated rubber structure comprising a hard plate and a rubbery layer, wherein at least one hard plate has
A laminated rubber structure in which an uneven portion is formed on at least one surface of an adhesive surface with a rubber layer. 2. The ratio A / A0 of the contact area A between the hard plate having the irregularities formed thereon and the rubbery layer and the contact area A0 between the hard plate having no irregularities and the rubbery layer is 1.01. 2. The laminated rubber structure according to claim 1, wherein the number is from 4.0 to 4.0. 3. 3. The laminated rubber structure according to claim 1, wherein the hard plate is made of a metal, a thermoplastic resin, or a composition thereof. 4. The laminated rubber structure according to claim 3, wherein the metal hard plate is a steel plate. 5. The laminated rubber structure according to claim 1, wherein the hard plate is made of at least one thermoplastic resin selected from a polyphenylene ether resin and a resin having an amino group. 6. The hard plate is made of a resin composition containing 0 to 30 parts by weight of a polyalkenylene and 0 to 30 parts by weight of a styrene-based polymer with respect to 100 parts by weight of a polyphenylene ether resin. Laminated rubber structure. 7. The laminated rubber structure according to claim 1, wherein the hard plate is composed of a resin composition containing 0 to 150 parts by weight of a filler with respect to 100 parts by weight of the thermoplastic resin. 8. The method of claim 1, wherein the polyphenylene ether resin is poly (2,
7. The laminated rubber structure according to claim 5, wherein the laminated rubber structure is 6-dimethyl-1,4-phenylene ether). 9. The laminated rubber structure according to claim 5, wherein the thermoplastic resin has an amino group capable of reacting with a carboxyl group in an amount of 30 to 200 mmol / kg. 10. The laminated rubber structure according to claim 9, wherein the thermoplastic resin is a polyamide resin. 11. A method for producing a laminated rubber structure, comprising laminating a hard plate having an uneven portion on at least one surface and a rubbery layer. 12. The method for producing a laminated rubber structure according to claim 11, wherein a hard plate having an uneven portion on at least one surface and an unvulcanized rubber are laminated and then vulcanized. 13. The ratio A / A0 between the contact area A between the hard plate having the uneven portions and the rubber layer and the contact area A0 between the hard plate having no uneven portions and the rubber layer is 1.01. The method for producing a laminated rubber structure according to claim 11, wherein the number is from 4.0 to 4.0. 14. The method for producing a laminated rubber structure according to claim 11, wherein the hard plate is made of a metal, a thermoplastic resin, or a composition thereof. 15. The metal hard plate is a steel plate.
A method for producing the laminated rubber structure according to the above. 16. The method for producing a laminated rubber structure according to claim 11, wherein the hard plate is made of at least one thermoplastic resin selected from a polyphenylene ether resin and a resin having an amino group. 17. The hard plate is composed of a resin composition containing 0 to 30 parts by weight of polyalkenylene and 0 to 30 parts by weight of a styrene-based polymer with respect to 100 parts by weight of polyphenylene ether resin. A method for producing a laminated rubber structure. 18. The method for producing a laminated rubber structure according to claim 11, wherein the hard plate is composed of a resin composition containing 0 to 150 parts by weight of a filler with respect to 100 parts by weight of the thermoplastic resin. 19. The method for producing a laminated rubber structure according to claim 16, wherein the polyphenylene ether resin is poly (2,6-dimethyl-1,4-phenylene ether). 20. The method for producing a laminated rubber structure according to claim 16, wherein the thermoplastic resin has an amino group capable of reacting with a carboxyl group in an amount of 30 to 200 mmol / kg. 21. The method for producing a laminated rubber structure according to claim 20, wherein the thermoplastic resin is a polyamide resin. 22. A method of using the laminated rubber structure according to any one of claims 1 to 10, wherein the laminated rubber structure is used for vibration isolation of a building. 23. A vibration-isolating method for damping a building using the laminated rubber structure according to any one of claims 1 to 10. 24. The method according to claim 22, wherein the laminated rubber structure having a flange is used by being attached to a building.