JP2002210831A - Method for manufacturing rubber laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a rubber laminate wherein the adhesion time of rubber layers and hard sheets is short and the respective shape dimensions of the respective vulcanized rubber layers after manufacture are uniform and the total height of the manufactured rubber laminate is adjusted to a set value. SOLUTION: In the method for manufacturing the rubber laminate wherein the rubber layers and the hard sheets are alternately laminated through an adhesive, each rubber layer comprises a vulcanized rubber composition and/or a semi-vulcanized rubber composition and the rubber laminate is heated and pressed by a press machine equipped with a heat source to be bonded. Alternatively, at least one of the rubber layers contains an unvulcanized rubber composition and the remainder of them comprises the vulcanized rubber composition and/or the semi-vulcanized rubber composition and the rubber laminate is heated and pressed by the press machine equipped with the heat source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a rubber laminate and a rubber laminate, and more particularly, to a method for producing a rubber laminate having a short bonding time, good adhesion between layers, and a height of a laminate according to a set value. The present invention relates to a rubber laminate suitable for various vibration energy absorbing devices, particularly a seismic isolation device, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, devices for absorbing vibration energy, that is, vibration isolating devices, vibration isolating devices, seismic isolation devices, and the like have been rapidly spreading. One form of such an apparatus is a seismic isolation laminated rubber in which steel plates and rubber layers are alternately laminated. The seismic isolation rubber acts as a very hard object in the vertical direction,
In the horizontal direction, it shifts greatly like a single rubber block and acts as a soft object.For example, when used as a support for buildings, bridges, etc., the shaking of the ground is directly transmitted to buildings etc. And protect buildings.

Conventionally, a rubber laminate is formed by molding an unvulcanized rubber compound into a sheet to form a rubber layer, and the rubber layer and a steel sheet coated with a metal adhesive are alternately layered, and these layers are pressed and pressed. By heating, the vulcanization of the rubber and the adhesion between the rubber layer and the steel plate were simultaneously performed. However, when the rubber is vulcanized, the unvulcanized rubber sheet causes a flow, and the rubber gauge becomes thinner than the set value, especially the rubber gauge near the upper and lower end plates with heat source becomes extremely thin, and the sheet is flush with the sheet. In addition, there is a problem that the gauge varies in the inside, and in order to obtain a predetermined thickness of the rubber layer, a mold having a complicated structure is required, and the production is complicated. In addition, since it is necessary to vulcanize a rubber sheet made of unvulcanized rubber, there is a problem that the production time is long.

Therefore, in order to provide a rubber laminate having a simple manufacturing process, low cost and excellent thickness accuracy, Japanese Patent Laid-Open No. 9-27-9
No. 2173, 9-272174, a sheet-like rubber preliminarily vulcanized is used as a rubber layer, and the sheet-like rubber and a metal plate are alternately laminated in 1 to 50 layers to form a cylindrical guide. A method of manufacturing a seismic isolation laminated rubber in which the laminate is held between two holding plates, and the plates are clamped by two holding plates, and these plates are fastened by holding bolts and heated to a temperature of 100 ° C to 170 ° C. This makes it possible to obtain a manufacturing method with high thickness accuracy and a simple manufacturing process.

However, in this manufacturing method, a laminate sandwiched between a cylindrical guide and two holding plates is heated or steam-heated using air, oil, or the like as a medium.
There is also a problem that it is necessary to heat the heat capacity of the cylindrical guide, and a large amount of heat is required. In addition, since air or oil is used as a medium, heat transfer is slow, and the effect of shortening vulcanization is not improved.

On the other hand, when the thickness of each vulcanized rubber sheet varies, for example, when all the vulcanized rubber sheets are slightly thick, the total thickness of the rubber layer in the laminate is reduced. Is thicker than the set value, and as a result, there is a problem in that the overall height of the manufactured laminated body varies, and the thickness cannot be set to the set value. This is because when a rubber laminate is used as a seismic isolation bearing used for seismic isolation, etc. for a building, a bridge or the like, a plurality of bearings are used, so the height varies. This is not preferable, and it is necessary to manufacture the device so that the height is equal to the set value.

[0007]

SUMMARY OF THE INVENTION The present invention provides a method for producing a rubber laminate in which the bonding time between a rubber layer and a hard plate is short and the shape and dimensions of each vulcanized rubber layer after production are uniform. That is the primary purpose. A second object of the present invention is to provide a method for producing a rubber laminate in which the entire height of the produced rubber laminate is set to a height as set. A third object of the present invention is to provide a rubber laminate having a height according to a set value manufactured by the above method.

[0008]

Means for Solving the Problems The present inventors have pre-vulcanized the rubber layer and the hard plate via an adhesive in comparison with the case where the rubber layer is made of an unvulcanized rubber composition. The rubber layer composed of the rubber composition or the rubber composition semi-vulcanized in advance to a predetermined degree of vulcanization has better adhesion to the hard plate. At this time, the upper and lower sides of the laminate are pressed by a press equipped with a heat source. By heating and pressurizing by sandwiching between a hot plate, it is possible to shorten the bonding time as compared with a heating method using air, oil, or the like as a medium, and a rubber layer made of a vulcanized or semi-vulcanized rubber composition. When there is a slight variation in thickness depending on the location, at least a part of the rubber layer is a layer containing an unvulcanized rubber composition, and a vulcanized rubber composition and / or a semi-vulcanized rubber composition are arranged in the rest. To obtain a rubber laminate with the height as set It found that it is, and have completed the present invention.

That is, the method for producing a rubber laminate according to the first aspect of the present invention is a method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein the rubber layer is A layer comprising a pre-vulcanized rubber composition and / or a pre-semi-vulcanized rubber composition, wherein the rubber laminate is heated and pressed by a press equipped with a heat source to bond the rubber laminate. is there.

Here, the semi-vulcanized rubber composition is
When the viscosity in the completely vulcanized state is the maximum viscosity and the viscosity in the unvulcanized state is the minimum viscosity, the objective of (target viscosity-minimum viscosity) / (maximum viscosity-minimum viscosity) ≧ 0.15 Preferably, the adhesive is vulcanized so as to have a viscosity, and the adhesive has an activation energy for adhesion reaction of 126 kJ / mo.
1 or less, and the peel force at the optimal bonding reaction time is 30
% Is preferably 30 minutes or less at 130.degree. Note that the target viscosity is a viscosity at a degree of crosslinking arbitrarily set by a manufacturer during vulcanization, and is a desired set viscosity. Further, it is preferable that the semi-vulcanized rubber composition is a rubber composition which is semi-vulcanized by electron beam irradiation.

[0011] The method for producing a rubber laminate according to the second aspect of the present invention is a method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A part includes the unvulcanized rubber composition, and the rest consists of the pre-vulcanized rubber composition and / or the semi-vulcanized rubber composition, and the rubber laminate is heated and vulcanized by a press equipped with a heat source. It is characterized by being pressed and bonded. The method for producing a rubber laminate according to the third aspect of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein at least one of the rubber layers is Including the unvulcanized rubber composition, the remaining layer is a layer composed of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, and the rubber laminate is heated by a press equipped with a heat source. It is characterized in that it is bonded by pressing. The second and third aspects may be mixed in one laminate, that is, a rubber layer in which vulcanized (semi-vulcanized) and unvulcanized are mixed, an unvulcanized rubber layer, and a vulcanized rubber layer. It may be combined with a sulfur (semi-vulcanized) rubber layer.

Here, the semi-vulcanized rubber composition is
When the viscosity in the completely vulcanized state is the maximum viscosity and the viscosity in the unvulcanized state is the minimum viscosity, the objective of (target viscosity-minimum viscosity) / (maximum viscosity-minimum viscosity) ≧ 0.15 It is preferable to vulcanize to have a viscosity. Further, the adhesive has an adhesive reaction activation energy of 126 kJ / mol.
30% of the peeling force at the optimal bonding reaction time
It is preferable that the adhesive reaction time at which the peeling force can be expressed is 30 minutes or less at 130 ° C. Note that the target viscosity is a viscosity at a degree of crosslinking arbitrarily set by a manufacturer during vulcanization, and is a desired set viscosity. Further, it is preferable that the semi-vulcanized rubber composition is a rubber composition which is semi-vulcanized by electron beam irradiation.

In addition, the present inventors have found that in bonding the rubber layer and the hard plate via the adhesive, the rubber composition or the vulcanized rubber composition or the pre-vulcanized rubber composition is compared with the case where the rubber layer is made of an unvulcanized rubber composition. A rubber layer composed of a rubber composition semi-vulcanized to a predetermined degree of vulcanization in advance has better adhesion to a hard plate, and at this time, provided with electromagnetic induction heating or a hot plate by electromagnetic induction heating By pressing and heating / pressing the upper and lower portions of the laminate with a hot plate with a press machine, the bonding time can be further shortened, and the thickness of the rubber layer composed of the vulcanized or semi-vulcanized rubber composition depends on the location. When there is slight variation, at least a part of the rubber layer is a layer containing the unvulcanized rubber composition, and the remaining vulcanized rubber composition and / or the semi-vulcanized rubber composition are disposed, so that the set value is obtained. A rubber laminate with a height of It found that it is theft, and have completed the present invention.

That is, a method of manufacturing a rubber laminate according to a fourth aspect of the present invention is directed to a method of manufacturing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A layer made of a pre-vulcanized rubber composition and / or a pre-semi-vulcanized rubber composition, wherein the hard plate is a metal plate; a rubber laminate obtained by alternately laminating the rubber layer and the metal plate The body is placed under the influence of the induction coil, and an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, thereby causing each metal plate to generate heat and being heated. While heating the rubber layer by heat conduction from the respective metal plates, a pressure is applied in the laminating direction of the rubber laminate to bond the rubber layer.

Further, according to a fifth aspect of the present invention, there is provided a method of manufacturing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A part comprising an unvulcanized rubber composition, the remainder comprising a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, wherein the hard plate is a metal plate; the rubber layer and the metal A rubber laminate formed by alternately laminating plates is placed under the influence of an induction coil, and an eddy current is generated in each of a plurality of metal plates constituting the rubber laminate by applying an alternating current to the induction coil. Heating the rubber layer by heat conduction from each of the heated metal plates and applying a pressing force in the laminating direction of the rubber laminate to bond the rubber layers. It is. The method for producing a rubber laminate according to the sixth aspect of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein at least one of the rubber layers is A layer made of an unvulcanized rubber composition, the remaining layers being made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, and wherein the hard plate is a metal plate; A rubber laminate formed by alternately laminating metal plates is placed under the influence of an induction coil, and an alternating current is applied to the induction coil to generate an eddy current in each of a plurality of metal plates constituting the rubber laminate. At least, each metal plate is heated, and the rubber layer is heated by heat conduction from each of the heated metal plates, and is applied by applying a pressing force in the laminating direction of the rubber laminate to bond them. Things. Note that the fifth and sixth aspects may be mixed in one laminate, that is, a rubber layer in which vulcanized (semi-vulcanized) and unvulcanized are mixed, an unvulcanized rubber layer, and a vulcanized rubber layer. It may be combined with a sulfur (semi-vulcanized) rubber layer.

Further, according to a method of manufacturing a rubber laminate according to a seventh aspect of the present invention, in the method of manufacturing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, A layer made of a pre-vulcanized rubber composition and / or a pre-semi-vulcanized rubber composition, wherein the hard plate is a metal plate; a rubber laminate obtained by alternately laminating the rubber layer and the metal plate The body is placed under the influence of the induction coil, and an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, thereby causing each metal plate to generate heat and being heated. The rubber layer is heated by heat conduction from each of the metal plates, and is bonded by applying a pressing force in the laminating direction of the rubber laminate using a press equipped with a heat source.

Further, the method for producing a rubber laminate according to an eighth aspect of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A part comprising an unvulcanized rubber composition, the remainder comprising a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, wherein the hard plate is a metal plate; the rubber layer and the metal A rubber laminate formed by alternately laminating plates is placed under the influence of an induction coil, and an eddy current is generated in each of a plurality of metal plates constituting the rubber laminate by applying an alternating current to the induction coil. The metal layers are heated by heating, and the rubber layer is heated by the heat conduction from each of the heated metal plates, and is pressed by a pressing machine equipped with a heat source in the laminating direction of the rubber laminate to be bonded. It is characterized by the following. The method for producing a rubber laminate according to the ninth aspect of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein at least one of the rubber layers is A layer composed of an unvulcanized rubber composition, the remaining layer being a layer composed of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, wherein the hard plate is a metal plate; A rubber laminate formed by alternately laminating layers and the metal plates is arranged under the influence of an induction coil, and an alternating current is applied to the induction coil to vortex each of the plurality of metal plates constituting the rubber laminate. A current is generated to cause each metal plate to generate heat, and the rubber layer is heated by heat conduction from each of the heated metal plates, and a pressing force having a heat source is used to apply a pressing force in a laminating direction of the rubber laminate. It is characterized by acting and bonding It is. The eighth and ninth aspects may be mixed in one laminated body, that is, a rubber layer in which vulcanized (semi-vulcanized) and unvulcanized are mixed, an unvulcanized rubber layer, and a vulcanized rubber layer. It may be combined with a sulfur (semi-vulcanized) rubber layer.

Here, in the fourth to ninth aspects,
When the semi-vulcanized rubber composition has a fully vulcanized state as a maximum viscosity and an unvulcanized state as a minimum viscosity, (target viscosity-minimum viscosity) / (maximum viscosity- It is preferable to vulcanize so as to have a target viscosity of (minimum viscosity) ≧ 0.15, and the adhesive has an adhesive reaction activation energy of 126 kJ / mol or less, and has a peeling force at an optimum adhesive reaction time. It is preferable that the adhesion reaction time at which a 30% peel force can be expressed is 30 minutes or less at 130 ° C. Note that the target viscosity is a viscosity at a degree of crosslinking arbitrarily set by a manufacturer during vulcanization, and is a desired set viscosity. Further, it is preferable that the semi-vulcanized rubber composition is a rubber composition which is semi-vulcanized by electron beam irradiation.

A rubber laminate according to a tenth aspect of the present invention is characterized by being manufactured by any one of the above manufacturing methods.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. <First aspect> The method for producing a rubber laminate according to the first aspect of the present invention uses a layer made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition as a rubber layer. Then, the rubber layers and the hard plates are alternately laminated via an adhesive, and the rubber laminate is heated and pressed by a press equipped with a heat source so as to be bonded. In all the embodiments of the present invention, the rubber composition is a composition containing rubber and, if necessary, additives.

In the present invention, a layer comprising a vulcanized rubber composition and / or a semi-vulcanized rubber composition is used as a rubber layer.
The rubber used as a raw material of the vulcanized rubber composition and the semi-vulcanized rubber composition is not particularly limited, and includes natural rubber (NR),
Isoprene rubber (IR), styrene / butadiene copolymer rubber (SBR), natural rubber / styrene / butadiene copolymer rubber (NR / SBR), natural rubber / butadiene rubber (NR / BR), natural rubber / acrylonitrile Butadiene rubber (NR / NBR), natural rubber / chloroprene rubber (NR / CR) and the like are preferably exemplified.

Various additives such as a filler, a plasticizer, an antioxidant, a vulcanizing agent, a vulcanization accelerator and a vulcanization aid can be added to the rubber, if necessary. Examples of fillers include carbon blacks such as HAF carbon and SAF carbon, etc., examples of plasticizers include aroma oils and waxes, examples of vulcanizing agents include sulfur and zinc white, and examples of vulcanization accelerators include N and N. -Cyclohexyl-2-benzothiazolesulfenamide (CBS), dibenzothiazyldisulfide (DM) and the like, and as a vulcanization aid, stearic acid and the like.

As the hard plate used in the production method of the present invention, various types of conventionally known steel plates can be used, and there is no particular limitation. For example, general structural steel plates, cold-rolled steel plates and the like can be used. Can be mentioned.

The thickness, size, and shape of the rubber layer and the hard plate are appropriately determined according to the application to which the manufactured rubber laminate is applied, and are not particularly limited. In addition, the plane shape of the rubber layer and the hard plate is a square plate shape for a bridge,
In the case of buildings, it is common to use a disk shape.

As an adhesive interposed between the rubber layer and the hard plate to bond these layers, a vulcanized adhesive can be used. As the vulcanizing adhesive, a halogenated elastomer is used, and is generally made of a material such as a chlorinated rubber and a chlorosulfonated polyethylene, a crosslinking agent or the like.

From the viewpoint of shortening the bonding time, an adhesive having a high bonding reaction speed can be preferably used. Usually, since the adhesion reaction between the rubber layer and the hard plate is performed simultaneously with the vulcanization of the rubber, it has been difficult to determine the reaction time of the adhesion reaction itself and the activation energy of the adhesion reaction. For this reason, the optimization of the adhesive by measuring the adhesive reaction time or the activation energy of the adhesive reaction has not been conventionally performed. In contrast, in the method for producing a rubber laminate of the present invention, a rubber layer made of a pre-vulcanized rubber composition or a rubber composition semi-vulcanized to a predetermined degree of vulcanization has better adhesion to a hard plate. It is found to be good, and a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition is used at least in part. Therefore, for example, by performing an adhesion test on a vulcanized rubber that has already been vulcanized, the reaction time of the adhesion reaction itself between the rubber layer and the hard plate can be determined. . For this reason,
From the measurement of the reaction time, it becomes possible to measure the activation energy of the adhesive reaction and the like, and it becomes possible to select the most suitable adhesive for the method for producing a rubber laminate according to the present invention.

In the present invention, the adhesive used preferably has an adhesive reaction activation energy of 126 kJ / mol or less, more preferably 113.4 kJ / m.
ol or less. Further, the bonding reaction time at which a peeling force of 30% of the peeling force at the optimum bonding reaction time can be expressed is 130.
The heating time is preferably 30 minutes or less, more preferably 20 minutes or less. By using such an adhesive, the bonding time can be further reduced.

Next, an example of the method for producing a rubber laminate according to the first embodiment of the present invention will be described. First, an additive is appropriately added to the unvulcanized rubber composition and kneaded to obtain an unvulcanized rubber sheet having a predetermined thickness and shape. afterwards,
The unvulcanized rubber sheet is vulcanized or semi-vulcanized at 130 ° C. to 150 ° C., and if necessary, punched into a predetermined shape to obtain a rubber layer.

Here, semi-vulcanized refers to a state in which an unvulcanized rubber composition has been vulcanized until it is completely vulcanized. The semi-vulcanized rubber composition has the following formula: (target viscosity-minimum viscosity) / (maximum viscosity-minimum viscosity) when the viscosity in the completely vulcanized state is the maximum viscosity and the viscosity in the unvulcanized state is the minimum viscosity. ) Is preferably vulcanized to a target viscosity of 0.15 or more, more preferably 0.15 to 0.7. By doing so, the semi-vulcanized rubber layer is in a state where it is difficult to flow under heating and pressure of the rubber laminate, and there is an effect that the thickness of the semi-vulcanized rubber layer can be kept uniform within the layer. .

The method of vulcanization is not particularly limited, and specific examples include a method by heating (press, steam) and a method by electron beam irradiation. In the method by heating, it is necessary to control the temperature and the pressure, but it is appropriately determined according to the rubber composition to be used and the like. The method of semi-vulcanization is also not particularly limited, and specifically, a method by heating (press, steam),
A method using electron beam irradiation and the like can be given. In the method by heating, it is necessary to control the temperature and the pressure, but it is appropriately determined according to the rubber composition to be used, the vulcanization rate, and the like. In the method using electron beam irradiation, it is necessary to control the absorbed dose, but it is appropriately determined according to the rubber composition used, the vulcanization rate, and the like. Semi-vulcanization is preferably performed by electron beam irradiation. For example,
In the method by press heating, it takes time to prepare an unvulcanized rubber sheet and take out a semi-vulcanized rubber sheet, and the workability is poor. With the electron beam, the workability is good because the belt-shaped unvulcanized rubber sheet can be continuously semi-vulcanized.

Subsequently, a hard plate having a predetermined shape is prepared, and if necessary, a chemical treatment such as a chlorination treatment or an oxidation treatment, a step or unevenness is performed on the hard plate in order to enhance the adhesion to the rubber layer. The surface is treated by mechanical processing such as providing a surface treatment, and the surface is further degreased.

Next, the above-mentioned adhesive is applied to the hard plate and / or the rubber layer so that the adhesive is interposed between the surfaces on which the hard plate and the rubber layer are laminated, and the layers are alternately laminated. The adhesive is
It may be applied to at least one of the hard plate and the rubber layer, preferably applied to the hard plate. It is preferable to apply the adhesive so as to have a thickness of 10 μm to 20 μm on the application surface. Further, rubber cement may be applied to the surface of the rubber layer in order to enhance the adhesiveness between the hard plate and the adhesive. The rubber cement is a solution in which a rubber compound as a raw material of a rubber layer is dissolved in an organic solvent such as benzene, toluene, and xylene. It is preferably a solution of an unvulcanized rubber compound obtained by mixing a vulcanizing agent with the same base rubber as the rubber layer, and preferably has good compatibility with the rubber layer.

The thickness and number of the rubber layer and the hard plate to be laminated are not particularly limited, and are appropriately determined according to the application to which the rubber laminate is applied. If necessary, the side surfaces of the laminate may be wrapped with a covering rubber.

The above-mentioned laminate is heated and pressed at a temperature of 130 ° C. to 150 ° C. and a pressure of 0.5 MPa to 15 MPa with a press machine equipped with a heat source sandwiching the upper and lower sides with a hot plate. Adhere to each other to produce a rubber laminate. According to the press machine, all the rubber layers and the hard plate can be adhered in 50% to 75% of the time in comparison with a heating method using air, oil, or the like as a medium in an oven or the like.
Further, from the viewpoint of further shortening the bonding time, the rubber layer and the hard plate are heated to about 130 ° C. to 150 ° C. in advance,
The laminate may be manufactured by laminating at a stretch via an adhesive at the time of production of the laminate, and pressing the laminate with a press in the above-mentioned pressure range. When pressed by a press machine, the hot plate of the press machine may be heated to a temperature of 130 ° C to 150 ° C,
You do not need to warm it.

<Second Aspect> The method for producing a rubber laminate according to the second aspect of the present invention is directed to a method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A part of the rubber layer contains an unvulcanized rubber composition, and the rest is made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, and the rubber laminate is pressed by a press equipped with a heat source. Is heated and pressed to adhere. The semi-vulcanization is preferably performed by electron beam irradiation, as in the first embodiment.

First, a rubber layer characteristic of the method for producing a rubber laminate according to the second embodiment of the present invention will be described in detail based on a preferred embodiment shown in the drawings. FIG. 2 is a cross-sectional view of a rubber laminate manufactured by an example of the manufacturing method according to the second embodiment, taken along a direction perpendicular to the laminating direction, and illustrates a layer partially including an unvulcanized rubber composition. Is shown. The disc-shaped rubber layer includes a vulcanized rubber portion 10 and an unvulcanized rubber portion 12.
In the disk-shaped unvulcanized rubber portion 12, a disk-shaped vulcanized rubber portion 10 smaller than the disk is arranged point-symmetrically.

When a part of the rubber layer is composed of the unvulcanized rubber composition, the rubber layer may be prepared by partially disposing a vulcanized or semi-vulcanized rubber layer in the unvulcanized rubber layer. Alternatively, the unvulcanized rubber layer may have a predetermined shape and may be disposed on a part of the vulcanized or semi-vulcanized rubber layer. In this case, the first object of uniforming the shape and dimensions of each vulcanized rubber layer after production and the second object of setting the entire height of the rubber laminate to a height as set can be effectively achieved. In order to
The arrangement positions of the vulcanized rubber composition and / or the semi-vulcanized rubber composition are point-symmetric with respect to the center point of the planar shape of the rubber layer as shown in FIG. Preferably, it is provided.

The effect of the vulcanized and / or semi-vulcanized rubber portion in the unvulcanized rubber layer is to maintain the thickness of each layer as a spacer during vulcanization (prevent extra flow of unvulcanized rubber), This has the effect of making the shape and dimensions of each rubber layer uniform. The manufacturing method of the second embodiment has an effect of shortening the bonding time, but the effect is smaller than that of the first embodiment.

<Third Aspect> In the method for producing a rubber laminate according to the third aspect of the present invention, at least one entire rubber layer contains an unvulcanized rubber composition, and the remaining layers are pre-vulcanized. A rubber composition and / or a semi-vulcanized rubber composition, a rubber layer and a hard plate are alternately laminated via an adhesive, and the rubber laminate is heated and pressed by a press equipped with a heat source. Is to be bonded. The semi-vulcanization is preferably performed by electron beam irradiation, as in the first embodiment.

FIG. 1 is a cross-sectional view of a rubber laminate manufactured by an example of the manufacturing method according to the third embodiment, cut in a laminating direction. As a plurality of layers including the upper and lower ends of the laminate, a vulcanized rubber layer 13 made of a vulcanized rubber composition is arranged, and as a plurality of layers including a central portion of the laminate, an unvulcanized rubber composition is used. An unvulcanized rubber layer 15 is disposed, and a hard plate 16 is provided between the respective rubber layers via an adhesive 14.
Is arranged.

In the third embodiment of the present invention, at least one rubber layer containing an unvulcanized rubber composition is used in order to adjust the height of the rubber laminate to a set value. Here, the rubber layer containing the unvulcanized rubber composition is one in which the entire rubber layer is composed of the unvulcanized rubber composition as shown in FIG. When the entire rubber layer is composed of the unvulcanized rubber composition, the unvulcanized rubber composition obtained by kneading the raw rubber by appropriately adding an additive is formed into a predetermined shape. The thickness, size and shape of the rubber layer containing the unvulcanized rubber composition are appropriately determined according to the use to which the manufactured rubber laminate is applied, and are not particularly limited.

At least one rubber layer composed of the unvulcanized rubber composition is sufficient, and the remaining layers are composed of the vulcanized rubber composition and / or
Or a layer or part of the semi-vulcanized rubber composition is unvulcanized,
The remainder is a vulcanized (semi-vulcanized) rubber layer. In addition, as the rubber which is a raw material of the unvulcanized rubber composition, and as necessary additives, all the rubbers described as raw materials of the vulcanized rubber composition and the semi-vulcanized rubber composition in the first embodiment, Agents can be mentioned. The hard plate and the adhesive used in the present invention include all those described in the first embodiment.

Next, an example of a method for producing a rubber laminate according to the third embodiment of the present invention will be described. First, a rubber layer composed of a vulcanized rubber composition and / or a semi-vulcanized rubber composition is prepared as described in the first embodiment, and a rubber layer containing an unvulcanized rubber composition is prepared as described above. Make it. Here, the definition and the preferred range of semi-vulcanization are the same as those described in the first embodiment. Next, in the same manner as described in the first embodiment, the rubber layer and the hard plate are laminated via an adhesive and, if necessary, a rubber cement.

Here, in the manufacturing method of the present invention, the rubber laminate is manufactured by pressing and heating and pressing the rubber laminate between the upper and lower sides by using a pressing machine.
As shown in (1), the layer occupying the center in the laminating direction of the rubber laminate is preferably a rubber layer containing an unvulcanized rubber composition. A layer containing an unvulcanized rubber composition may be provided over a plurality of layers above and below the layer occupying the center. For example, 40% of the height of the rubber laminate from each of the upper and lower ends of the rubber laminate
The rubber layer laminated between 〜30% is a layer composed of a vulcanized rubber composition and / or a semi-vulcanized rubber composition, and occupies 20% of the height of the rubber laminate, occupying the center of the rubber laminate. ~ 40
% Is preferably a layer containing an unvulcanized rubber composition.

The above-mentioned laminate is heated and pressed at a temperature of 130 ° C. to 150 ° C. and a pressure of 0.5 MPa to 15 MPa with a press machine equipped with a heat source sandwiching the upper and lower sides with a hot plate, and the rubber layer and the hard layer are hardened. The plate and the rubber plate are bonded to each other to produce a rubber laminate. By this method, the entire height of the rubber laminate can be adjusted to the height as set.

<Fourth to Ninth Aspects> The method for producing a rubber laminate according to the fourth aspect of the present invention is a method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. The method wherein the rubber layer is a pre-vulcanized rubber composition and / or
Or a layer made of a rubber composition that has been semi-vulcanized in advance, wherein the hard plate is a metal plate; and a rubber laminate formed by alternately laminating the rubber layer and the metal plate is arranged under the influence of an induction coil. Then, an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, thereby causing each metal plate to generate heat, and by conducting heat from each of the heated metal plates. The method is characterized in that, while the rubber layer is being heated, a pressure is applied in the laminating direction of the rubber laminate to thereby bond the rubber laminate.

Further, the method for producing a rubber laminate according to the fifth and sixth aspects of the present invention is the method for producing a rubber laminate wherein a rubber layer and a hard plate are alternately laminated via an adhesive. A part of the rubber layer contains an unvulcanized rubber composition, and the rest consists of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, or at least one layer of the rubber layer is unvulcanized. A layer composed of a rubber composition, the remaining layers are layers composed of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, and the hard plate is a metal plate; A rubber laminate formed by alternately laminating metal plates is placed under the influence of an induction coil, and an alternating current is applied to the induction coil to generate an eddy current in each of a plurality of metal plates constituting the rubber laminate. At the very least, heat each metal plate, and from each heated metal plate While heating the rubber layer by thermal conduction, it is characterized in that the adhering by applying a pressure in the stacking direction of the rubber laminate.

The method for producing a rubber laminate according to a seventh aspect of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein the rubber layer is added in advance. A layer made of a vulcanized rubber composition and / or a semi-vulcanized rubber composition, wherein the hard plate is a metal plate; and a rubber laminate obtained by alternately laminating the rubber layer and the metal plate. Arranged under the influence of the induction coil, an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, and each of the metal plates is heated to generate a temperature. The method is characterized in that the rubber layer is heated by heat conduction from a metal plate, and is bonded by applying a pressing force in a laminating direction of the rubber laminate using a press equipped with a heat source.

The method for producing a rubber laminate according to the eighth and ninth aspects of the present invention is the method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive. A part of the rubber layer contains an unvulcanized rubber composition, and the rest consists of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, or at least one layer of the rubber layer is unvulcanized. A layer composed of a rubber composition, the remaining layers are layers composed of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition, and the hard plate is a metal plate; A rubber laminate formed by alternately laminating metal plates is placed under the influence of an induction coil, and an alternating current is applied to the induction coil to generate an eddy current in each of a plurality of metal plates constituting the rubber laminate. At the very least, heat each metal plate, and from each heated metal plate With heating the rubber layer by thermal conduction, it is characterized in that the adhering by applying a pressure in the stacking direction of the rubber laminate by a press machine equipped with a heat source.

The fourth to sixth aspects are methods for producing a rubber laminate which is performed by an apparatus equipped with a press capable of performing electromagnetic induction heating and which uses the specific rubber layer described above. The seventh to ninth aspects are directed to a method of manufacturing a rubber laminate using a specific rubber layer by simultaneously performing heating and pressing by using an apparatus provided with a press having upper and lower hot plates that can be subjected to electromagnetic induction heating. Is the way. In these embodiments, if the side surface of the rubber laminate is wrapped with the covering rubber if necessary,
A mold or the like for restraining the outer peripheral surface may be used. The mold is not particularly limited, and a general mold can be used. Here, the specific rubber layer is a rubber layer manufactured and used in the first to third aspects, and is as described above.
The electromagnetic induction heating method is a heating method often used in recent years,
The apparatus, conditions and the like are not particularly limited, and a general method may be used. For example, it can be carried out by the method and apparatus described in JP-A-10-193504.

In the fourth to ninth embodiments, the semi-vulcanized rubber composition has the highest viscosity in the completely vulcanized state and the lowest viscosity in the unvulcanized state. Preferably, the adhesive is vulcanized to have a target viscosity of (target viscosity-minimum viscosity) / (highest viscosity-minimum viscosity) ≧ 0.15, and the adhesive has an adhesive reaction activation energy of 126 kJ. / Mol or less, and it is preferable that the adhesive reaction time at which the peeling force of 30% of the peeling force at the optimum adhesive reaction time can be expressed is 30 minutes or less at 130 ° C., as in the first to third embodiments. is there. Similarly, the semi-vulcanized rubber composition is preferably a rubber composition which is semi-vulcanized by electron beam irradiation.

According to the fourth to ninth aspects, the rubber laminate having excellent shape and dimensional properties, dimensional accuracy, and the like are maintained, and
Further shortening of the bonding time is possible. Specifically, by vulcanizing the rubber sheet in advance and manufacturing it by electromagnetic induction heating, the manufacturing time can be reduced to about half or less of the manufacturing method of press-vulcanizing the unvulcanized rubber sheet, The production time can be further reduced by using a hot plate press together with induction heating.

<Tenth Aspect> A rubber laminate according to a tenth aspect of the present invention is produced by the above-described method for producing a rubber laminate. In the rubber laminate manufactured by these manufacturing methods, a rubber layer and a hard plate are alternately laminated and firmly adhered to each other, have a uniform rubber thickness, or the height of the entire rubber laminate is set. It is as per the value. This rubber laminate is usually a semi-underground construction ground and is provided between the lower part of the building to support structures such as buildings and provide seismic resistance. This is a structure in which a hard plate is used, and a thin rubber plate is firmly bonded to this. The shape and structure are not particularly limited, and various types are conceivable depending on the size and shape of the structure to be constructed and the construction site.

[0054]

The present invention will be described more specifically with reference to the following examples. (Preparation of rubber sheet) First, an unvulcanized rubber composition having the composition shown below was kneaded and molded, and 0.32 cm (thickness)
An unvulcanized rubber sheet A having a shape of × 13 cm × 13 cm was produced. Next, an unvulcanized rubber composition having the composition shown below is vulcanized under the conditions of 2 MPa and 150 ° C. × 30 minutes to obtain a vulcanized rubber sheet B of 0.3 cm (target thickness) × 13 cm × 13 cm. Was prepared. Further, the unvulcanized rubber sheet A is irradiated with an electron beam under the conditions shown below, and the semi-vulcanized rubber sheet C having an absorbed dose of 200 kGv (condition 1) and the semi-vulcanized rubber sheet C of 1720 kGv (condition 2) are subjected to semi-vulcanized rubber. Sheet D was obtained. However, variations were added to the finish, and a vulcanized rubber sheet of about 0.32 cm was completed. <Composition> NR 100 parts by mass Carbon black (HAF) 30 parts by mass Aroma oil 3 parts by mass Sulfur 2.5 parts by mass Zinc oxide (zinc white) 5 parts by mass Vulcanization accelerator (CBS) 1.0 parts by mass (CBS: N-cyclohexyl-2-benzothiazolylsulfenamide) stearic acid 3 parts by mass

(Semi-Cure by Electron Beam Irradiation) Area Beam Electron Irradiator EBC manufactured by Nissin High Voltage Co., Ltd.
The test was carried out under the following conditions using -250-AA. Condition 1 Condition 2 Acceleration voltage 200 kV, 150 kV Current 10 mA, 20 mA Line speed 6 m / min, 2 m / min Absorbed dose 200 kGy, 1720 kGy Scan width 13 cm, 13 cm

(Evaluation of Adhesive Property) A 90 ° peel test was carried out on the unvulcanized rubber sheet A or the vulcanized rubber sheet B bonded to a steel sheet according to JIS K 6256, and the peel force (unit [ N / mm]). A steel plate was used as a hard plate, and after a surface treatment was performed by sandblasting, a steel plate surface was degreased with toluene and dried. An adhesive (Sixson) is applied to the surface of the steel sheet, and the above-described unvulcanized rubber sheet A or vulcanized rubber sheet B is heated under pressure at 150 ° C. for 30 minutes at 2 MPa.
It was left at 5 ° C. for 72 hours. Table 1 shows the measurement results.

[0057]

Table 1 shows that the adhesion between the vulcanized rubber sheet B and the hard plate is superior to the adhesion between the unvulcanized rubber sheet A and the hard plate.

(Measurement of Optimal Adhesion Reaction Time) In order to determine the adhesion reaction time of the adhesive used in the examples described later,
The following tests were performed. First, the vulcanized rubber sheet B and the steel sheet were bonded to each other, and a 90 ° peel test was performed in accordance with JIS K6256 to obtain a peel force (unit: [N / m
m]) was measured. However, the same steel plate as used in the above-described adhesion test was used as the hard plate. An adhesive (Sixson) is applied to the surface of the steel sheet, and the vulcanized rubber sheet B is
After press-bonding and heating at 130 ° C. under MPa, it was left at 25 ° C. for 72 hours. According to this measurement method, the heating time at which the peeling force is highest (referred to as “100% peeling force”) is measured at 130 ° C., and the peeling force corresponding to 30% of the peeling force (“30% peeling force”) is measured. ) Was determined. Table 2 shows the measurement results.

[0060]

(Measurement of Activation Energy of Adhesion Reaction) The following test was conducted to determine the adhesion reaction activation energy of the adhesive used in Examples described later. With respect to the vulcanized rubber sheet B and the steel sheet bonded together, the heating time at which the peeling force becomes the highest at 130 ° C., 140 ° C., and 150 ° C. was determined based on the above-described measurement method, which corresponds to 30% of the peeling force. The heating time as the peeling force was determined, and the adhesive reaction activation energy was calculated from each temperature and the heating time according to the Arrhenius rule. Similarly, the heating time at which the peeling force corresponding to 50% and 70% of the highest peeling force (referred to as “50% peeling force” and “70% peeling force”, respectively) is determined, and the activation energy of the adhesive reaction is calculated. Calculated. These 3 at each temperature
The average of the activation energies at 0%, 50% and 70% was taken as the activation energy of the adhesive reaction. The results are shown in Table 3.

[0062]

As described above, the adhesive used in the examples described below has an adhesive reaction activation energy of 126 kJ / mol.
30% of the peeling force at the optimal bonding reaction time
It can be seen that the adhesive reaction time capable of expressing the peeling force is 30 minutes or less at 130 ° C., which is the most suitable adhesive for producing the rubber laminate of the present invention.

(Preparation of Rubber Laminate) <Examples 1 to 5> Using the above-described vulcanized rubber sheet B and a steel sheet, the steel sheet was subjected to a surface treatment by sandblasting, and the steel sheet surface was degreased with toluene and bonded. Agent (Sixson)
Was applied. After the adhesive was dried, four vulcanized rubber sheets B and three steel plates 0.30 cm (thickness) × 13 cm ×
13 cm alternately. This was subjected to a surface treatment by sand blasting, the steel plate surface was degreased with toluene, and an adhesive (Sixson) was applied.
(Thickness) 5MP by a press equipped with a hot plate on the top and bottom with a steel plate at the end of 13cm x 13cm
a, A rubber laminate was produced by heating and pressurizing at 130 ° C.

A rubber laminate was prepared in the same manner as in Example 1 except that two unvulcanized rubber sheets A were used at the center in the laminating direction as a rubber layer, and the resultant was used as Example 2.

An unvulcanized rubber sheet A is prepared and has a radius of 2 cm.
Four cylindrical holes were cut out point-symmetrically with respect to the center point of the planar shape of the rubber sheet. Subsequently, a vulcanized rubber sheet having the same shape as that of the cylindrical hole is produced by hollowing out the vulcanized rubber sheet B, filling the hole of the unvulcanized rubber sheet A, and forming the unvulcanized rubber sheet containing the vulcanized rubber sheet. Sheet E was prepared. Example 1 except that the above-described unvulcanized rubber sheet E containing a vulcanized rubber sheet was used at the center in the laminating direction as a rubber layer.
A rubber laminate was produced in the same manner as in Example 1 to obtain Example 3.

Except that the semi-vulcanized rubber sheet C was used,
A rubber laminate was produced in the same manner as in Example 1, and Example 4
And A rubber laminate was produced in the same manner as in Example 1 except that the semi-vulcanized rubber sheet D was used, and the resultant was referred to as Example 5.

<Comparative Examples 1-2> Two holding plates,
A rubber laminate was produced in the same manner as in Example 1 except that a mold having clamping means consisting of bolts for holding these plates was used and heated in an oven.

A rubber laminate was prepared in the same manner as in Example 1 except that the unvulcanized rubber sheet A was used as the rubber layer.

(Adhesion time) In preparing the rubber laminates of Example 1 and Comparative Example 1, a thermocouple was charged at the center, and the temperature rise over time at the center was recorded and determined by the above test. The thermal energy required for the adhesive reaction was calculated from the activation energy of the adhesive reaction, the time during which the thermal energy was applied was measured, and this time was defined as the time to complete the adhesive reaction. The results are shown in Table 4.

[0071] As is clear from Table 4, it can be seen that the use of a press can significantly reduce the bonding time.

(Lamination Accuracy) Examples 1 to 5 and Comparative Example 2
Was cut, and the thickness of the vulcanized rubber layer between the steel plates was measured. The measurement was performed by measuring three places in each rubber layer and calculating the average thickness. The results are shown in Table 5. The height of the entire rubber laminate was determined, and the results are shown in Table 5. In addition, the set value of the height of a rubber laminated body is 7.50 cm.

[0073]

[Table 1]

From the above, it can be seen that Examples 1 to 5 have a uniform rubber thickness as compared with Comparative Example 2. Example 1
It can be seen that the height of the entire rubber laminate of ~ 5 takes a value close to the set value, and in particular, the height of the entire rubber laminate of Examples 2 and 3 using the layer containing the unvulcanized rubber composition Is almost the set value. Also, in Examples 4 and 5 using the rubber sheets C and D semi-vulcanized with an electron beam, it can be seen that the height of the entire rubber laminate is almost the same as in Examples 2 and 3. Furthermore, workability during semi-vulcanization was good.

(Production of Rubber Laminate by Electromagnetic Induction Heating) <Example 6> An unvulcanized rubber composition was vulcanized under the same conditions as for the above vulcanized rubber sheet B to 29.1 mm (height).
A vulcanized rubber sheet F of × 510 mm × 510 mm was produced. After using a vulcanized rubber sheet F and a steel sheet, the steel sheet was subjected to a surface treatment by sandblasting, the steel sheet surface was degreased with toluene, and an adhesive (Sixson) was applied. After the adhesive was dried, three vulcanized rubber sheets F and two steel plates 3.20 mm (height) × 510 mm × 510 mm were alternately laminated. This was subjected to a surface treatment by sandblasting, and then the surface of the steel sheet was degreased with toluene, and an adhesive (Sixson) was applied. 32.0 mm (height) × 510 m
A laminated body sandwiched between two upper and lower end steel plates of mx 510 mm was put into a mold having an outer frame, and subjected to electromagnetic induction heating and pressing under the following conditions, and 157 mm (height) x 510 m
m (width) x 510 mm (length) to produce a rubber laminate,
Example 6 was used. Electromagnetic induction heating conditions Current 435A Frequency 6Hz Press pressure 10MPa

Example 7 In the production of a rubber laminate,
In contrast to the method of Example 6 in which pressing is performed from above and below at the time of electromagnetic induction heating, except that heating and pressing are performed at 10 MPa and 135 ° C. by a press equipped with a hot plate above and below during electromagnetic induction heating, A rubber laminate was produced in the same manner as in Example 7 to obtain a rubber laminate. The electromagnetic induction heating conditions were the same as in Example 6, except for the pressing temperature.

Comparative Example 3 Unvulcanized rubber sheet A described above
30.7 mm (height) × 510 m
An unvulcanized rubber sheet G was prepared in a shape of mx 510 mm. A rubber laminate was produced in the same manner as in Example 6 (electromagnetic induction heating / pressing), except that the unvulcanized rubber sheet G was used.

<Comparative Example 4> Using an unvulcanized rubber sheet G, heating was performed at 10 MPa and 135 ° C. using a press machine equipped with upper and lower hot plates instead of electromagnetic induction heating and pressing.
A rubber laminate was produced in the same manner as in Example 6 except that pressure was applied, and Comparative Example 4 was obtained.

(Adhesion time) In preparing the rubber laminates of Examples 6 and 7, a thermocouple was placed at the center, the temperature rise over time at the center was recorded, and the adhesion reaction obtained in the above test was determined. The thermal energy required for the adhesive reaction was calculated from the activation energy of the sample, the time during which the thermal energy was applied was measured, and this time was defined as the time to complete the adhesive reaction. The results are shown in Table 6. (Vulcanization time) In preparing the rubber laminates of Comparative Examples 3 and 4, a thermocouple was charged at the center, and the temperature rise over time at the center was recorded, and required for the vulcanization reaction required in advance in the test. The thermal energy was calculated, the time during which the thermal energy was applied was measured, and this time was defined as the time to complete the vulcanization reaction. The results are shown in Table 6.

(Lamination Accuracy) Examples 6 and 7 and Comparative Example 3,
The rubber laminate produced in 4 was cut, and the thickness of the vulcanized rubber layer between the steel plates was measured. The measurement was performed by measuring three places in each rubber layer and calculating the average thickness. The results are shown in Table 6. The height of the entire rubber laminate was determined, and the results are shown in Table 6. The set value of the height of the rubber laminate is 157 mm. The physical property tests and the like (for example, the adhesiveness of each rubber layer) of Examples 6 and 7 are the same as those of Examples 1 to 7.
It was almost the same as 5.

[0081]

[Table 2]

From the above, it can be seen that Examples 6 and 7 have a more uniform rubber thickness than Comparative Examples 3 and 4. Also,
The height of the entire rubber laminate of Examples 6 and 7 was found to take a value close to the set value, indicating excellent lamination accuracy. Also, in the production of rubber laminates by electromagnetic induction heating,
The vulcanization time can be reduced by using a vulcanized rubber sheet (Example 6 and Comparative Example 3), and the vulcanization time can be further reduced without impairing excellent lamination accuracy by using electromagnetic induction heating and a hot plate press together ( Example 7).

[0083]

According to the method for producing a rubber laminate of the present invention, the time required for producing the rubber laminate can be reduced because the bonding time between the rubber layer and the hard plate is short, and the entire rubber laminate can be produced. Since the height can be set as the set value,
It is the most suitable structure for bridge support or building base seismic isolation. Further, according to the present invention, it is possible to flexibly cope with the manufacture of a larger seismic isolation device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view in the laminating direction of a rubber laminate manufactured by one example of a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view in a direction perpendicular to a laminating direction of a rubber laminate manufactured by one example of a manufacturing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vulcanized rubber part 12 Unvulcanized rubber part 13 Vulcanized rubber layer 14 Adhesive 15 Unvulcanized rubber layer 16 Hard plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) // B29K 21:00 B29K 21:00 105: 22 105: 22 B29L 9:00 B29L 9:00 (72) Inventor Atsushi Shimada 2-1 Oiwake, Hiratsuka-shi, Kanagawa Prefecture Inside the Hiratsuka Factory of Yokohama Rubber Co., Ltd. (72) Inventor Atsushi Miyachi 2-1 Oiwake, Hiratsuka-shi, Kanagawa Prefecture Inside of Hiratsuka Factory, Yokohama Rubber Co., Ltd. (72) Inventor Tetsu Shimanoe 2-1 Oiwake, Hiratsuka-shi, Kanagawa Prefecture F-term in the Hiratsuka Factory of Yokohama Rubber Co., Ltd. (reference) EJ42 EJ46 EJ53C EJ85 JA06C JK12A JK12E YY00B YY00C YY00D 4F203 AA45 AC03 AD05 AE07 AG02 AG03 DA11 DB01 DB26 DC09 4F211 AA45 AC03 AD03 AD05 AE07 AG02 AG03 TA03 TA09 TC02 TD11 TN07 TN16 TN42 TQ04

Claims (13)

[Claims] 1. A method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein the rubber layer has a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. A method for producing a rubber laminate, wherein the rubber laminate is adhered by heating and pressing with a press equipped with a heat source. 2. A method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein a part of the rubber layer contains an unvulcanized rubber composition and the rest is pre-vulcanized. A method for producing a rubber laminate, comprising heating and pressurizing the rubber laminate by a press equipped with a heat source, the rubber laminate being made of a rubber composition obtained in advance and / or a semi-vulcanized rubber composition in advance. 3. The method according to claim 1, wherein at least one of the rubber layers is a layer made of an unvulcanized rubber composition, and the remaining layers are made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. The method for producing a rubber laminate according to claim 1. 4. A method of manufacturing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein the rubber layer has a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. A layer made of a material, wherein the hard plate is a metal plate; a rubber laminate formed by alternately laminating the rubber layer and the metal plate is arranged under the influence of an induction coil, and an alternating current is applied to the induction coil. While energizing to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate to cause each metal plate to generate heat, while heating the rubber layer by heat conduction from each raised metal plate, A method for producing a rubber laminate, characterized in that the rubber laminate is bonded by applying a pressing force in a laminating direction of the rubber laminate. 5. A method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein a part of the rubber layer contains an unvulcanized rubber composition and the rest is pre-vulcanized. The hard plate is a metal plate; and the effect of an induction coil on a rubber laminate obtained by alternately laminating the rubber layer and the metal plate is formed of a rubber composition and / or a semi-vulcanized rubber composition. Arranged below, an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, thereby causing each of the metal plates to generate heat. A method for producing a rubber laminate, wherein the rubber layer is bonded by applying a pressing force in a laminating direction of the rubber laminate while heating the rubber layer by heat conduction. 6. A method according to claim 1, wherein at least one of said rubber layers is a layer made of an unvulcanized rubber composition, and the other layer is made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. The method for producing a rubber laminate according to claim 4. 7. A method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein the rubber layer has a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. A layer made of a material, wherein the hard plate is a metal plate; a rubber laminate formed by alternately laminating the rubber layer and the metal plate is arranged under the influence of an induction coil, and an alternating current is applied to the induction coil. Each of the plurality of metal plates constituting the rubber laminate is energized to generate an eddy current to cause each metal plate to generate heat, and to heat the rubber layer by heat conduction from each raised metal plate, A method for producing a rubber laminate, characterized in that the rubber laminate is bonded by applying a pressing force in a laminating direction of the rubber laminate using a press equipped with a heat source. 8. A method for producing a rubber laminate in which a rubber layer and a hard plate are alternately laminated via an adhesive, wherein a part of the rubber layer contains an unvulcanized rubber composition and the rest is pre-vulcanized. The hard plate is a metal plate; and the effect of an induction coil on a rubber laminate obtained by alternately laminating the rubber layer and the metal plate is formed of a rubber composition and / or a semi-vulcanized rubber composition. Arranged below, an alternating current is applied to the induction coil to generate an eddy current in each of the plurality of metal plates constituting the rubber laminate, thereby causing each of the metal plates to generate heat. A method for manufacturing a rubber laminate, wherein the rubber layer is heated by heat conduction, and is bonded by applying a pressing force in a laminating direction of the rubber laminate using a press equipped with a heat source. 9. A method according to claim 1, wherein at least one of said rubber layers is a layer made of an unvulcanized rubber composition, and the other layer is made of a pre-vulcanized rubber composition and / or a semi-vulcanized rubber composition. The method for producing a rubber laminate according to claim 7. 10. When the semi-vulcanized rubber composition has a fully vulcanized state having a maximum viscosity and an unvulcanized state has a minimum viscosity, (target viscosity-minimum viscosity) /
The method for producing a rubber laminate according to any one of claims 1 to 9, wherein the rubber has a target viscosity of (highest viscosity-lowest viscosity) ≥ 0.15. 11. The production of a rubber laminate according to claim 1, wherein said semi-vulcanized rubber composition is a rubber composition which is semi-vulcanized by electron beam irradiation. Method. 12. The adhesive has an adhesive reaction activation energy of 126 kJ / mol or less, and an adhesive reaction time at 130 ° C. of 30 minutes or less at which a peel force of 30% of the peel force at the optimum adhesive reaction time can be exhibited. The method for producing a rubber laminate according to any one of claims 1 to 11, wherein 13. A rubber laminate produced by the method for producing a rubber laminate according to any one of claims 1 to 12.