JP4525166B2 - Sliding member and sliding seismic isolation device using the sliding member - Google Patents

Description

  The present invention relates to a sliding member and a sliding seismic isolation device using the sliding member.

Japanese Examined Patent Publication No. 39-14852 JP-A-11-182095

  Conventionally, in order to obtain a phenol resin sliding member containing a cotton cloth base material, the cotton cloth base material is dipped in a phenol resin varnish dispersed with graphite, molybdenum disulfide or ethylene tetrafluoride resin powder, etc. A method is used in which a prepreg in which the solid lubricant is adhered and impregnated on a base material is obtained by heating to dissipate the solvent, and this is used as a laminated sliding member as a molding material.

  However, in order to maintain workability when forming the prepreg by dipping and pulling up the cotton fabric base material, it is necessary to keep the mixing ratio of the solid lubricant relatively low, and as a result, the solid lubricant obtained by the above-mentioned known method In the sliding member, the friction coefficient cannot be lowered so much and sufficient wear resistance cannot be obtained.

  In addition, even if the mixing ratio of the solid lubricant can be increased, the mixture of the resin and the solid lubricant is not sufficiently filled into the fiber structure gap of the fiber base material by simple dipping, and the mixture is not However, when such a prepreg is used for lamination molding, the resulting molded product may cause delamination, and as a result, the mechanical strength of the sliding member may be significantly reduced. .

  In order to solve such a problem, a reinforcing base material is impregnated with a synthetic resin varnish in advance, and then a varnish containing a solid lubricant is applied to the varnish-impregnated base material, or an aqueous dispersion of a solid lubricant is applied. Thus, there is a method in which a solid lubricant is adhered only to substantially the surface of the substrate (described in Patent Document 1). However, even in the method disclosed herein, the low friction and wear resistance of the sliding member are not always sufficient.

  In particular, in recent years, such slip members have been installed in combination with elastic bearing devices that support buildings, bridges, and elevated roads in the field of construction and civil engineering. When applied, there is a problem that it is difficult to withstand use from the viewpoint of low friction and wear resistance.

  As an application of such a sliding member to a sliding seismic isolation device, there has been proposed a seismic isolation device in which a polyethylene terephthalate woven fabric is impregnated with a resin composition obtained by adding ethylene tetrafluoride to unsaturated polyester resin. (Patent Document 2). This seismic isolation device can be applied to a seismic isolation device that could not be achieved by the above-mentioned sliding member, but it is not necessarily satisfactory in terms of low friction as a sliding seismic isolation device. . In other words, the slip isolation device greatly affects the slippage due to the seismic force due to the magnitude of the friction coefficient. For example, when the friction coefficient is about 0.1, the slippage must be less than 0.1 G (gal). The seismic isolation device does not slide out, and the function of the seismic isolation device is hindered.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a seismic isolation that has low friction and can exhibit a sufficient seismic isolation function even from a large seismic force to a small seismic force. It is an object of the present invention to provide a sliding member that can be applied to a device and a sliding seismic isolation device using the sliding member.

  In the sliding member according to the first aspect of the present invention, a surface layer material comprising a woven fabric composed of at least one of inorganic fibers and organic fibers and a tetrafluoroethylene resin filled and coated on the woven fabric is a fiber woven fabric. The surface layer material is integrally joined to the surface of a substrate made of a cloth-reinforced thermosetting synthetic resin, and at least one recess is formed in the surface material. A lubricating composition comprising 20 to 40% by weight, melamine cyanurate 20 to 40% by weight, and ethylene tetrafluoride resin 20 to 50% by weight is filled.

  According to the sliding member of the first aspect, the ethylene tetrafluoride resin layer is exposed on the surface of the surface material, and at least one recess formed in the surface material has a silicone oil content of 5 to 30% by weight. And 40% by weight of silicone wax, 20 to 40% by weight of melamine cyanurate, and 20 to 50% by weight of ethylene tetrafluoride resin. The friction and the lubricating composition can be combined to maintain low friction over a long period of time.

  The inorganic fiber preferably contains at least one of glass fiber and carbon fiber as in the sliding member of the second aspect of the present invention, and the organic fiber is the sliding member of the third aspect of the present invention. As described above, at least one of an aramid fiber and an aromatic polyester fiber is preferably included.

  These inorganic fibers and organic fibers form a woven fabric that forms the skeleton of the surface layer material. The woven structure of the woven fabric is not particularly limited, and may be any of plain weave, oblique weave, satin weave, and the like.

  The concave portion may include at least one of a cylindrical concave portion and a concave portion formed of two rectangular long grooves orthogonal to each other, like the sliding member of the fourth aspect of the present invention.

  The concave portion formed in the surface layer material mainly holds the lubricating composition, and the shape is not particularly limited, but from the viewpoint of workability and the like, like the sliding member of the fourth aspect of the present invention, It is preferably a columnar concave portion or a concave portion consisting of two rectangular long grooves orthogonal to each other, and if the lubricating composition can be fed out from the concave portion and a coating layer made of the lubricating composition can be uniformly formed on the surface of the surface layer material One may be used, but a plurality of recesses is preferable because this can be effectively achieved.

  The sliding seismic isolation device according to the first aspect of the present invention disposed between the upper structure and the lower structure is fixed to either one of the upper structure and the lower structure. The sliding member according to any one of the above aspects, which is fixed to the sliding plate and any one of the upper structure and the lower structure and slidably contacts the sliding plate on the surface of the surface layer material It is equipped with.

  According to the slip seismic isolation device of the first aspect, an ethylene tetrafluoride resin layer is exposed on the surface of the surface material of the sliding member fixed to the upper structure or the lower structure, and is formed on the surface material. In at least one of the recesses, a lubricating composition comprising 5 to 30% by weight of silicone oil, 20 to 40% by weight of silicone wax, 20 to 40% by weight of melamine cyanurate, and 20 to 50% by weight of ethylene tetrafluoride resin. And a sliding plate fixed to the lower structure or the upper structure and the lubricating composition filled in the concave portion of the surface layer material and the ethylene tetrafluoride resin layer exposed on the surface of the surface layer material. By moving, it exhibits low friction and slides out quickly regardless of the magnitude of the seismic force, so that it can exert a sufficient seismic isolation function even from a large seismic force to a small seismic force

  The sliding plate is preferably a lubricating coating of a composition comprising an epoxy resin, a curing agent, a reactive silicone oil having an epoxy group, and a triazine thiol on the surface thereof, as in the sliding seismic isolation device of the second aspect of the present invention. In this case, the sliding member is slidably in contact with the sliding plate through the lubricating film of the composition on the surface of the surface layer material.

  According to the sliding seismic isolation device of the second aspect, the sliding plate has a lubricating film of a composition comprising an epoxy resin formed on the surface thereof, a curing agent, a reactive silicone oil having an epoxy group, and triazine thiol. Since it slides with the surface layer material of the sliding member and the lubricating composition filled in the recess formed in the surface layer material, the friction coefficient between them is particularly low at around 0.02 at high surface pressure. As a result of exhibiting friction and sliding quickly regardless of the magnitude of the seismic force, a sufficient seismic isolation function can be exhibited even from a large seismic force to a small seismic force.

  The composition constituting the lubricating coating comprises 100 parts by weight of an epoxy resin and a curing agent, a reactive silicone oil having an epoxy group, and triazine thiol, as in the sliding seismic isolation device of the third aspect of the present invention. It is good to consist of 2 to 30 parts by weight.

  If the sum of the reactive silicone oil having an epoxy group and the triazine thiol is less than 2 parts by weight, the blending effect cannot be obtained, and if it exceeds 30 parts by weight, the lubricating coating machine formed on the surface of the sliding plate If the composition constituting the lubricating coating is like the slip-type seismic isolation device of the third aspect, these problems can be eliminated.

  The blending weight ratio of the epoxy resin and the curing agent is (epoxy resin) :( curing agent) = when the epoxy equivalent of the epoxy resin is E as in the slip isolation device of the fourth aspect of the present invention. It is preferable that it is E: 10-E: 300.

  The blending weight ratio of the reactive silicone oil having an epoxy group and the triazine thiol is (triazine thiol) / (reactive silicone oil having an epoxy group) = as in the slip isolation device of the fifth aspect of the present invention = It is preferable in it being 0.03-1.

  According to the slip isolation device of the fifth aspect, the reactive silicone oil having an epoxy group is an oily substance having a linear structure, but reacts with triazine thiol in the above blending ratio to form a three-dimensional network structure, Since it plays a role of improving the toughness of the lubricating coating and improving the bonding strength between the surface of the sliding plate and the lubricating coating, there is no problem such as peeling of the lubricating coating in friction with the sliding member.

  According to the present invention, it is possible to provide a slip member that can exhibit a sufficient seismic isolation function even from a large seismic force to a small seismic force and a slip seismic isolation device using the slip member. In the seismic isolation device using the sliding member of the present invention, the friction coefficient shows a value of around 0.02, so that the seismic isolation cycle can be lengthened while keeping the acceleration of the slipping out small. Therefore, the design freedom of the slip isolation device can be greatly increased.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 and 2, the sliding member 1 includes a rectangular column base 2 made of a fiber woven cloth reinforced thermosetting synthetic resin, a surface layer material 4 integrally bonded to one surface 3 of the base 2, It comprises a plurality of recesses 5 formed in the surface layer material 4 and a coating layer 7 made of a lubricating composition filled in the recesses 5 of the surface layer material 4 and coated on the surface 6 of the surface layer material 4. The sliding member 1 may be a cylinder as shown in FIG. 3, and the concave portion 5 may be a single concave portion composed of two rectangular long grooves perpendicular to each other as shown in FIG. Good.

  In the manufacturing apparatus for the base body 2 of the sliding member 1 shown in FIG. 4, the reinforcing base material 10 made of a fiber woven fabric wound around an uncoiler 9 is fed by a feed roller 11 to a container 14 in which a thermosetting synthetic resin varnish 13 is stored. By passing through the thermosetting synthetic resin varnish 13 stored in the container 14 by the guide rollers 15 and 16 provided in the container 14, the thermosetting synthesis is performed on the surface of the reinforcing substrate 10. A resin varnish 13 is applied. Next, the reinforcing base material 10 coated with the thermosetting synthetic resin varnish 13 was sent to the compression rolls 18 and 19 by the feed roller 17 and applied to the surface of the reinforcing base material 10 by the compression rolls 18 and 19. The thermosetting synthetic resin varnish 13 is impregnated into the fiber structure gap. And the resin reaction is advanced at the same time as the solvent is blown off in the drying furnace 20 to the reinforcing base material 10 impregnated and coated with the thermosetting synthetic resin varnish 13, and thereby a prepreg (resin processing base material) that can be molded. 21 is produced. The prepreg 21 thus obtained is cut to a desired size as shown in FIG. 5 and a plurality of the prepregs 21 are stacked to form a laminate, and then heated and pressed in the stacking direction to reinforce the fiber woven fabric. A substrate 2 made of a curable synthetic resin is produced.

  As the fiber woven fabric used for the substrate 2, a cotton fabric, a glass fiber fabric, a carbon fiber fabric or the like is suitable. In addition, as the thermosetting synthetic resin, phenol resin, epoxy resin, unsaturated polyester resin and the like are suitable. As the volatile solvent of these thermosetting synthetic resins, thermosetting using methanol, acetone, methyl ethyl ketone and the like. It is appropriately selected depending on the synthetic resin. The solid content of the thermosetting synthetic resin varnish formed by dissolving the thermosetting synthetic resin in a volatile solvent is about 30 to 65% by weight, and the viscosity of the resin varnish is about 800 to 5000 cP. 1000 to 4000 cP is preferred.

  The surface layer material 4 is formed by coating a woven fabric made of inorganic fibers or organic fibers with a tetrafluoroethylene resin (hereinafter abbreviated as “PTFE”) dispersion. By this coating, PTFE is filled in the fiber tissue gap of the woven fabric and coated on the surface of the woven fabric. The woven fabric used for the surface layer material 4 is preferably a woven fabric made of inorganic fibers such as glass fibers or carbon fibers, or a woven fabric made of organic fibers such as aramid fibers or aromatic polyester fibers. The woven fabric texture of these fibers is not particularly limited, and may be any of plain weave, oblique weave, satin weave and the like. As PTFE dispersion coated on these woven fabrics, “Teflon (registered trademark) 30-J (trade name)” manufactured by Mitsui DuPont Fluorochemical Co., Ltd., “Polyflon D-1, D-2” manufactured by Daikin Industries, Ltd. (Trade name) "," Fullon AD639 (trade name) "manufactured by Asahi Glass Co., Ltd., etc. are preferably used.

  The surface layer material 4 is integrally bonded to one surface 3 of the base 2 by an adhesive or the like. In this way, a plurality of recesses 5 that are recessed in the thickness direction are formed on the surface layer material 4 that is integrally bonded onto the one surface 3 of the substrate 2. The plurality of recesses 5 formed in the surface layer material 4 are formed so that the total area of the openings of the recesses 5 occupying the surface area of the surface layer material 4 is 20 to 30%. The recess 5 is filled and held with a lubricating composition to be described later. In order to satisfactorily exhibit the frictional properties such as low friction of the lubricating composition, the recess 5 occupies the surface area of the surface material 4. At least 20% of the total area of the openings is required. However, if the total area of the openings of the recesses 5 occupying the surface area of the surface layer material 4 exceeds 30%, the strength of the surface layer material 4 is reduced.

  The concave portion 5 may be formed by drilling such as a drill, but a plurality of through holes are formed in the surface layer material 4 in advance, and the surface layer material 4 is integrated with one surface 3 of the base 2. The recess 5 may be formed by bonding and closing the through hole.

  The lubricating composition filled in the plurality of recesses 5 formed in the surface layer material 4 is 5 to 30% by weight of silicone oil, 20 to 40% by weight of silicone wax, 20 to 40% by weight of melamine cyanurate, and 20 to 50% by weight of PTFE. % Is included.

  In the lubricating composition, the silicone wax mainly exerts an effect of reducing the friction coefficient and plays a role as a carrier that absorbs and holds the silicone oil described later. As the silicone wax, dimethylpolysiloxane, methylphenylpolysiloxane, long-chain alkyl-modified polysiloxane, trifluoropropylmethylpolysiloxane and the like are suitable. Specific examples include “silicone wax W23 (trade name)” manufactured by Asahi Kasei Wacker Silicone. The blending ratio of the silicone wax is 20 to 40% by weight, preferably 25 to 30% by weight. When the blending ratio is less than 20% by weight, desired low friction characteristics cannot be obtained. When the blending ratio exceeds 40% by weight, the moldability deteriorates and the strength of the molded body (solid lubricant) decreases. To do.

  Silicone oils work with the silicone wax to improve low friction, especially when used under high load conditions. Preferred examples of the silicone oil include dimethyl silicone oil or silicone oil in which a part of the methyl group of dimethylpolysiloxane is substituted with a polyether group, a phenyl group, an alkyl group, an aralkyl group, a fluorinated alkyl group, or the like. . A viscosity (25 degreeC) of 100-50000 cSt, Preferably 500-10000 cSt is used suitably. Specific examples include dimethyl silicone oil “KF96H (trade name)” manufactured by Shin-Etsu Chemical Co., Ltd. and dimethyl silicone oil “AK series (trade name)” manufactured by Asahi Kasei Wacker Silicone. Since most of this silicone oil is absorbed and retained by the above-mentioned silicone wax, a relatively large amount of the silicone oil can be blended. And the compounding ratio of a silicone oil is 5 to 30 weight%, Preferably it is 10 to 25 weight%. When the blending ratio is less than 5% by weight, when used under high load conditions, the amount supplied to the sliding surface is small and the effect of improving the low friction property is not sufficiently exerted, and when it exceeds 30% by weight May flow out (bleed out) at the time of molding and may reduce the shape retention of the molded body.

  Melamine cyanurate is an addition compound of melamine and cyanuric acid or isocyanuric acid. A 6-membered ring melamine molecule and cyanuric acid (isocyanuric acid) molecule are arranged in a plane by hydrogen bonds, and the plane has weak bonding strength. The layers overlap each other and have cleavage properties such as molybdenum disulfide and graphite. This melamine cyanurate has the effect | action which improves the low friction property and abrasion resistance of a solid lubricant. The blending ratio is usually 20 to 40% by weight, preferably 25 to 35% by weight. When the blending ratio is less than 20% by weight, the effect of improving the low friction property and the wear resistance is not sufficiently exhibited, and when it exceeds 40% by weight, the wear resistance may be lowered.

  PTFE mainly exerts an effect of imparting low friction. The PTFE used in the present invention is PTFE mainly used for molding as molding powder or fine powder (hereinafter abbreviated as “high molecular weight PTFE”), and the high molecular weight PTFE is decomposed or irradiated by radiation. PTFE used as an additive material (hereinafter abbreviated as “low molecular weight PTFE”), which has a molecular weight lower than that of high molecular weight PTFE, is easy to grind, and has good dispersibility. ). As PTFE, high molecular weight PTFE alone or a mixture of high molecular weight PTFE and low molecular weight PTFE can be used. The blending ratio (weight) of the high molecular weight PTFE and the low molecular weight PTFE as a mixture is usually 1: 1 to 3: 1.

  As high molecular weight PTFE for molding powder, “Teflon (registered trademark) 7-J (trade name)”, “Teflon (registered trademark) 7A-J (trade name)”, “Teflon (manufactured by Mitsui DuPont Fluoro Chemical Co., Ltd.)” "Registered trademark" 70-J (trade name) "," Polyflon M-12 (trade name) "manufactured by Daikin Industries, Ltd.," Fluon G163 (trade name) "," Fluon G190 (trade name) "manufactured by Asahi Glass Or the like. As high molecular weight PTFE for fine powder, “Teflon (registered trademark) 6CJ (trade name)” manufactured by Mitsui / Dupont Fluoro Chemical Co., Ltd., “Polyflon F201 (trade name)” manufactured by Daikin Industries, Ltd., etc., manufactured by Asahi Glass Co., Ltd. “Full-on CD076 (product name)”, “Full-on CD090 (product name)”, and the like.

  Further, as the high molecular weight PTFE, in addition to the above high molecular weight PTFE, those obtained by modifying the high molecular weight PTFE with a styrene-based, acrylate-based, methacrylic ester-based, acrylonitrile-based polymer, etc. can be used. Examples thereof include “Metablene A-3000 (trade name)” manufactured by Mitsubishi Rayon Co., Ltd. Low molecular weight PTFE includes “TLP-10F (trade name)” manufactured by Mitsui DuPont Fluoro Chemical Co., “Lublon L-5 (trade name)” manufactured by Daikin Industries, Ltd., and “Fullon L169J (trade name) manufactured by Asahi Glass Co., Ltd. Product name) "and" KTL-8N (product name) "manufactured by Kitamura.

  The blending ratio of PTFE is 20 to 50% by weight, preferably 25 to 40% by weight. When the blending ratio is less than 20% by weight, the desired low friction property cannot be obtained, and when it exceeds 50% by weight, the wear resistance is deteriorated and the shape retention as a molded body is deteriorated, The strength of the molded body will be reduced.

  The lubricating composition having the above-described component composition is filled in the plurality of concave portions 5 of the surface layer material 4 of the base 2 as follows. A predetermined amount of each of the above-mentioned components is mixed with a mixer such as a Henschel mixer, super mixer, ball mill, or tumbler, and the resulting mixture is melt-kneaded at a temperature at which the wax in the component melts. It supplies to the surface layer material 4 of the base | substrate 2 in which the recessed part 5 was formed. Subsequently, the kneaded product is filled in the concave portion 5 of the surface layer material 4 by being compressed with a predetermined pressure.

  In this way, the base 2 made of the fiber woven cloth reinforced thermosetting synthetic resin, the surface layer material 4 integrally bonded to the one surface 3 of the base 2, and the plurality of layers formed on the surface layer material 4 A sliding member 1 comprising the concave portion 5 and the lubricating composition filled in the concave portion 5 of the surface layer material 4 is produced.

  A sliding seismic isolation device using this sliding member 1 is shown in FIG. In FIG. 6, the sliding member 1 is fixed to an upper structure G such as a building, a bridge, and an elevated road, and a sliding plate 25 is fixed to a lower structure B such as a bridge pier and an abutment. The surface of the sliding plate 25 and the coating layer 7 made of the lubricating composition filled in the plurality of recesses 5 on the surface of the surface material 4 of the sliding member 1 serve as sliding surfaces.

  As the sliding plate 25, a sliding plate made of a stainless steel plate (SUS403) 27 having a lubricating coating 26 on one surface thereof is used.

  As the lubricating coating 26 formed on one surface of the stainless steel plate 27, a lubricating coating of a composition comprising an epoxy resin, a curing agent, a reactive silicone oil having an epoxy group, and triazine thiol is preferably used.

  A method for forming a lubricating film 26 of a composition comprising an epoxy resin, a curing agent, a reactive silicone oil having an epoxy group, and triazine thiol on one surface of the stainless steel plate 27 will be described. Reactive silicone oil having epoxy group after dissolving or dispersing epoxy resin and reactive silicone oil having epoxy group in organic solvent, then dissolving curing agent, triazine thiol, or dissolving epoxy resin in organic solvent Oil, a hardening | curing agent, and triazine thiol are melt | dissolved or disperse | distributed, and a solution whose solid content is 30 to 40 weight% and whose viscosity (normal temperature) is about 100 to 200 cSt is produced. Using this solution, a coating film is formed on the stainless steel plate 27, which has been subjected to treatments generally performed in general such as shot blasting and degreasing, by means of brushing, spraying, and the like, and a curing treatment is performed to obtain a cured coating film. . Various curing conditions can be adopted depending on what curing agent is used after the coating is formed. As an example, when an alicyclic amine is used as a curing agent, after forming a coating film, it is naturally dried or pre-dried in a hot air drying furnace for about 30 minutes to dissipate the solvent, and then 180 ° C. This is performed by baking at a temperature of about 30 minutes. The lubricating coating 26 thus obtained has a thickness of about 20 to 40 μm.

  In the lubricating coating 26, conventionally known epoxy resins can be used. For example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, brominated bisphenol A type. Examples thereof include glycidyl ether type epoxy resins such as epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, and alicyclic epoxy resins. These may be used alone or in combination of two or more. Specifically, bisphenol A type liquid or solid epoxy resin “Epicoat (trade name)” manufactured by Yuka Shell Epoxy Co., Ltd. may be mentioned. This epoxy resin forms the base of the lubricating coating and also functions as an adhesive with the base (stainless steel plate 27).

  As the curing agent, those conventionally used as curing agents for epoxy resins can be used, and examples thereof include polyamines, acid anhydrides, phenol resins, polyamide resins, and mercaptan compounds.

  Examples of polyamines include aliphatic polyamines such as diethylenetriamine and triethylenetetramine, alicyclic amines such as isophoronediamine and bis (4-amino-3-methylcyclohexyl) methane, and aromatics such as diaminodiphenylmethane, diaminodiphenylsulfone, and metaphenylenediamine. Includes heterocyclic amines, aminoethylpiperazine, heterocyclic amines such as 3,9-bis (3-aminopropyl) -2,4,10-tetraoxaspiro [5.5] undecane, dicyandiamide and their modified ones It is. Examples of the modification method include making an adduct with an epoxy resin, ethylene oxide, propylene oxide, acrylonitrile, and ketones. Specific examples of the polyamine include modified aliphatic polyamine “EpiCure T (trade name)” manufactured by Yuka Shell Epoxy, modified alicyclic amine “EpiCure 113 (trade name)”, modified aromatic amine “Epicure W ( Product name) ".

  Examples of acid anhydrides include aliphatic acid anhydrides such as dodecyl succinic anhydride and polyazeline acid anhydride, alicyclic anhydrides such as hexahydrophthalic anhydride, tetrahydrophthalic anhydride, and methylnadic anhydride, phthalic anhydride, Aromatic anhydrides such as trimellitic anhydride and pyromellitic anhydride, and halogen acid anhydrides such as tetrabromophthalic anhydride and het anhydride are included, and tertiary amines and imidazole derivatives are generally used as curing accelerators. Specific examples include “Epicure 134A (trade name)” manufactured by Yuka Shell Epoxy.

  Examples of the phenol resin include novolak type phenol resins, and generally a curing accelerator is used in combination.

  Examples of the polyamide resin include polyamide obtained from dimer acid and polyamine which are dimers of unsaturated fatty acids.

  A mercaptan compound is an aliphatic polysulfide polymer having a mercapto group -SH at both ends of the molecular structural formula, and it does not react with an epoxy resin by itself, so it needs to be used in combination with the polyamine or tertiary amine. It is. Specific examples of mercaptan compounds include “Cup Cure 3800 (trade name)” manufactured by Yuka Shell Epoxy Co., Ltd.

  The blending ratio of the epoxy resin and the curing agent is determined by the ratio between the number of epoxy groups or hydroxyl groups in the epoxy resin and the number of functional groups in the curing agent that reacts with the epoxy groups or hydroxyl groups. For example, when polyamine is used as the curing agent, assuming that the epoxy equivalent of the epoxy resin is E and the amine equivalent of the polyamine is A, it is polyamine (0.8 to 1.2) × Ag with respect to the epoxy resin Eg. Here, the epoxy equivalent is the number of grams of epoxy resin containing 1 gram equivalent of epoxy groups, and the amine equivalent is the number of grams of polyamine containing 1 gram equivalent of active hydrogen that reacts with epoxy groups. Therefore, the blending weight ratio of the epoxy resin and the curing agent varies depending on the type of epoxy resin and the type of curing agent used, but is set as follows. That is, it mix | blends in the ratio shown in Table 1 with respect to the epoxy resin Eg. Here, E is an epoxy equivalent value of the epoxy resin.

  Moreover, what is necessary is just to mix | blend 1-20g of hardening accelerators with respect to the epoxy resin Eg, when using together a hardening accelerator.

  The reactive silicone oil having an epoxy group is a silicone oil in which a part of methyl group of dimethylpolysiloxane is substituted with a functional group having an epoxy group. For example, it is represented by the following formula (1), (2) or (3).

  In the formulas (1), (2) and (3), X represents an epoxy group-containing group, for example, the following formula (4), (5), (6) or (7), and m is an integer of 5 to 10,000. And n is an integer from 2 to 100.

  Of the above reactive silicone oils having an epoxy group, silicone oils of the following formulas (8) and (9) are preferred.

  In formulas (8) and (9), m is an integer of 5 to 10,000, and n is an integer of 2 to 100.

  The reactive silicone oil having an epoxy group is an oily substance having a linear structure, but forms a three-dimensional network structure by reacting with triazine thiol described later. This three-dimensional network structure is no longer oily but retains lubricity. The three-dimensional network structure plays a role of improving the toughness of the lubricating coating 26.

  Triazine thiol is represented by the following formula (10).

In formula (10), A is a mercapto group —SH, a dibutylamino group —N (C ₄ H 9) ₂ , or an anilino group —NHC ₆ H ₅ .

  As described above, the triazine thiol has a role as a crosslinking agent for the reactive silicone oil having an epoxy group, and causes the reactive silicone oil having an epoxy group to have a three-dimensional network structure.

  Triazine thiol has been conventionally used as a crosslinking agent for rubber and vinyl chloride, as an adhesive between metal and rubber, and as a metal surface treatment agent. When the lubricating coating 26 is formed, it is extremely reactive and reacts with the epoxy resin to firmly bond with the three-dimensional network structure of the silicone oil having the epoxy group and also with the base surface (stainless steel plate 27). Therefore, it is considered that it also plays a role of improving the adhesive strength between the base and the coating.

  The mixing ratio of the triazine thiol to the reactive silicone oil having an epoxy group may be more than the amount necessary to crosslink the silicone oil having an epoxy group to form a three-dimensional network structure, preferably (the mixing of triazine thiol) (Weight) / (blending weight of reactive silicone oil having epoxy group) = 0.03-1.

  The amount of the reactive silicone oil having an epoxy group and the triazine thiol is 100 parts by weight of the sum of the epoxy resin and the curing agent, and the sum of the amount of the reactive silicone oil having an epoxy group and the triazine thiol is 2 to 30 parts by weight, preferably 5 to 20 parts by weight. When the blending ratio is less than 2 parts by weight, the blending effect cannot be obtained, and when it exceeds 30 parts by weight, the mechanical strength of the lubricating coating is significantly reduced.

  Next, the present invention will be described in detail based on examples. The present invention is not limited to these examples.

[Production of sliding plate]
A stainless steel plate (SUS304) having a width of 62 mm and a length of 178 mm was prepared, and one surface of the steel plate was roughened by shot blasting and degreased. As an epoxy resin, 76 parts by weight of “Epicoat 828 (trade name)” manufactured by Yuka Shell Epoxy Co., Ltd. having an epoxy equivalent of 190, and as a curing agent, “Epicure 113 (Product) made by a modified alicyclic amine-based Yuka Shell Epoxy Co., Ltd. Name) "Reactive silicone oil having 24 parts by weight of epoxy group, epoxy modified silicone oil" KF- "manufactured by Shin-Etsu Chemical Co., Ltd. having an epoxy equivalent of 3600 corresponding to the above formula 9 having an alicyclic epoxy group in the chain. 102 (trade name) "4.8 parts by weight, 0.2 parts by weight of 2-dibutylamino-4,6-dithiol-s-triazine" Disnet DB (trade name) "manufactured by Sankyo Kasei Co., Ltd. as triazine thiol The solution obtained by dissolving in the organic solvent methyl ethyl ketone so that the content (solid content) of these components as a whole is 33% by weight. The coated surface is sprayed on the surface that has been surfaced by a spraying means, preliminarily dried in a hot air drying furnace for 30 minutes to dissipate the solvent, and then heated and baked for 30 minutes at a temperature of 180 ° C. A 40 μm lubricating film was formed and used as a sliding plate.

[Preparation of substrate]
A plain woven cotton cloth is prepared as a reinforcing fiber cloth, and the cotton cloth is passed by a feed roller through a container storing a phenol resin varnish having a resin solid content of 64.5% by weight, and the resin varnish is applied to the surface of the cotton cloth. After impregnating the resin varnish coated on the surface of the cotton cloth with a compression roll to the gap between the fiber structures, the solvent is dissipated in the drying furnace and the reaction of the resin proceeds simultaneously to obtain a prepreg (resin-treated cotton cloth) It was. This prepreg was cut into a circular shape with a diameter of 60 mm, and six of them were stacked and laminated, and then heated and pressure-molded in the laminating direction, and this was used as a substrate made of a fiber woven cloth reinforced thermosetting synthetic resin.

[Production of surface material]
A plain woven glass fiber woven fabric is prepared as a woven fabric, and this woven fabric is filled and coated with “Full-on PTFE dispersion XAD912 (trade name)” manufactured by Asahi Glass Co., Ltd. as a PTFE dispersion to form a PTFE layer on the surface of the woven fabric. This was used as the surface layer material.

  The surface layer material was integrally bonded onto the six substrates stacked with an adhesive to form a laminate (substrate thickness 9 mm, surface layer thickness 1 mm). The surface layer material of this laminate was formed with 14 circular recesses having a diameter of 8 mm and a depth of 1 mm by drilling (the total area of the openings of the recesses in the surface area of the surface layer material was 25%).

(Preparation of lubricating composition)
Preparation of Lubricating Composition (1) Asahi Kasei Wacker exhibiting 10 to 25% by weight of dimethyl silicone oil [“KF96H (trade name)” manufactured by Shin-Etsu Chemical Co., Ltd.] as a silicone oil and a viscosity of 300 cSt at 50 ° C. as a silicone wax “Silicone Wax W23 (trade name)” manufactured by Silicone Co., 25 to 30% by weight, “MCA (trade name)” manufactured by Mitsubishi Chemical Corporation as melamine cyanurate, 25% by weight, and high molecular weight PTFE (manufactured by Asahi Glass Co., Ltd.) as PTFE “Fluon G163 (trade name)” of 25 to 40% by weight was charged into a Henschel mixer to prepare a mixture. The obtained mixture was heated to a temperature of 80 ° C. higher than the melting point of the silicone wax in the component, and melt kneaded to prepare a kneaded product of the lubricating composition (1).

Preparation of Lubricating Composition (2) 10 to 25% by weight of dimethyl silicone oil (same as above), 25% by weight of silicone wax (same as above) and 25% by weight of melamine cyanurate (same as above) as silicone oil , 12.5 to 20% by weight of high molecular weight PTFE (same as above) as PTFE and 10 to 20% by weight of low molecular weight PTFE (“Fluon L169J (trade name)” manufactured by Asahi Glass Co., Ltd.) are mixed into a Henschel mixer. Was made. The obtained mixture was heated to a temperature of 80 ° C. above the melting point of the silicone wax in the components, and melt kneaded to prepare a kneaded product of the lubricating composition (2).

Examples 1-4
After supplying a predetermined amount of the kneaded product of the lubricating composition (1) to the surface layer material of the laminate, the kneaded product of the lubricating composition (1) supplied to the surface including the recesses of the laminate and the surface layer material was 80 The mixture was compression-molded at a temperature of 1 ° C. for 1 minute, and the kneaded material was filled in the concave portions of the surface layer material, and a coating layer of the kneaded material was formed on the surface of the surface layer material. Table 2 shows the component compositions of the lubricating compositions (1) of Examples 1 to 4.

(Table 2)
Example 1 2 3 4
Lubricating composition (1) (wt%)
Silicone oil 10 10 20 25
Silicone wax 25 30 30 25
Melamine cyanurate 25 25 25 25
PTFE (high molecular weight) 40 35 25 25

Examples 5-7
After supplying a predetermined amount of the kneaded product of the lubricating composition (2) to the surface layer material of the laminate, the kneaded product of the lubricating composition (2) supplied to the surface including the concave portion of the laminate and the surface layer material is 80 The mixture was compression molded at a temperature of 1 ° C. for 1 minute, and the kneaded material was filled in the concave portions of the surface layer material, and a coating layer of the kneaded material was formed on the surface of the surface layer material. Table 3 shows the component compositions of the lubricating compositions (2) of Examples 5 to 7.

(Table 3)
Examples 5 6 7
Solid lubricant (wt%)
Silicone oil (dimethyl silicone oil) 10 20 25
Silicone wax 25 25 25
Melamine cyanurate 25 25 25
PTFE (high molecular weight) 20 20 12.5
PTFE (low molecular weight) 20 10 12.5

Comparative Example Three prepregs (surface layer material) composed of 30% by weight of aramid fiber woven fabric, 39% by weight of epoxy resin and 31% by weight of PTFE, and 5 sheets of prepreg (substrate) obtained by impregnating a plain woven cotton fabric with a phenol resin varnish. These were compression molded to integrally bond the substrate and the surface layer material, and this was used as a sliding member. The same slip board as the above was used for the slip board used as a counterpart material.

  Next, the friction performance of the sliding members of Examples 1 to 7 and the sliding member made of the comparative example was tested under the test conditions 1 and 2 shown below.

<Test condition 1>
Surface pressure 17N / mm ²
Speed 10mm / sec, 100mm / sec, 200mm / sec, 300mm / sec, 400mm / sec, 500mm / sec, 600mm / sec
Mating material (sliding plate) The above sliding plate Lubrication No lubrication Test method A sliding plate (with the lubricating coating facing upward) is fixed on the base of a biaxial testing machine, and the surface material of the sliding member is placed on the sliding plate with a coating layer. The sliding member is slidably contacted, and a load is applied to the sliding member so that the surface pressure becomes 17 N / mm ² (constant), and the sliding plate side is vibrated (± 100 mm) at each of the above speeds to produce friction. The coefficient was measured.

<Test condition 2>
Surface pressure 17N / mm ²
Speed 100mm / sec
Mating material (sliding plate) Above sliding plate Lubrication No lubrication Sliding distance 400m
Test method A sliding plate (with the lubricating film facing upward) is fixed on the stand of the biaxial testing machine, and the surface layer material of the sliding member is slidably brought into contact with the sliding plate via the coating layer, and the sliding member A load is applied so that the surface pressure becomes 17 N / mm ² (constant), and the sliding plate side is vibrated at the above speed (± 100 mm) to reach sliding distances of 80 m, 160 m, 240 m, 320 m, and 400 m, respectively. The coefficient of friction at the time was measured.

  Table 4 shows the test results (friction coefficient) of the sliding members composed of Examples 1 to 7 and Comparative Examples performed under the above test condition 1, and the sliding members composed of Examples 1 to 7 and Comparative Examples performed under the test condition 2 are shown in Table 4. The test results (friction coefficient) are shown in Table 5.

  The test condition 1 is a test for speed dependency. As can be seen from the test results, the combination of the sliding member and the sliding plate of Example 1 to Example 7 has very little speed dependency, that is, the speed is low. While the results showed that the variation of the friction coefficient with respect to the change was very small, in the combination of the sliding member and the sliding plate of the comparative example, an increase in the friction coefficient was recognized according to the change in speed, and it was dependent on the speed. The result showed that it was inferior.

  The test condition 2 is an endurance test. As can be seen from the test results, in the combination of the sliding member and the sliding plate of Examples 1 to 7, the friction coefficient is about 0.02 through the sliding distance. While stable sliding was performed with a low friction coefficient, the combination of the sliding member and the sliding plate of the comparative example showed a high friction coefficient throughout the sliding distance.

  When these results are applied to a slip isolation device, the friction coefficient in the combination of a slip member and a slip plate is around 0.02, which increases the length of the base isolation cycle while keeping the acceleration of the slide small. It becomes possible. Moreover, the design freedom of the slip isolation device can be greatly increased.

It is a top view of the sliding member of this invention. It is the II-II sectional view taken on the line of FIG. It is a top view of the other example of the sliding member of the present invention. It is explanatory drawing which shows a manufacturing process. It is a perspective view which shows the lamination | stacking state of a prepreg. It is a section explanatory view showing a slip seismic isolation device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding member 2 Base | substrate 4 Surface material 5 Recessed part 25 Slip board 26 Lubrication film

Claims (9)

  The surface of the substrate comprising a woven fabric composed of at least one of inorganic fibers and organic fibers and a surface layer material composed of a tetrafluoroethylene resin filled and coated on the woven fabric composed of a woven fabric reinforced thermosetting synthetic resin. And at least one recess is formed in the surface layer material, in which 5 to 30% by weight of silicone oil, 20 to 40% by weight of silicone wax, and 20 to 40 of melamine cyanurate are formed. A sliding member characterized by being filled with a lubricating composition composed of 20% by weight and 20 to 50% by weight of a tetrafluoroethylene resin.   The sliding member according to claim 1, wherein the inorganic fibers include at least one of glass fibers and carbon fibers.   The sliding member according to claim 1 or 2, wherein the organic fiber includes at least one of an aramid fiber and an aromatic polyester fiber.   The sliding member according to any one of claims 1 to 3, wherein the recess includes at least one of a cylindrical recess and a recess made of two rectangular long grooves orthogonal to each other.   A sliding seismic isolation device disposed between an upper structure and a lower structure, wherein the sliding plate is fixed to one of the upper structure and the lower structure, and the upper structure and the lower structure. 5. The slidable contact with the sliding plate is carried out on the surface of the surface layer material that is fixed to one of the other structures and the recess is filled with the lubricating composition. 6. A sliding seismic isolation device comprising a sliding member.   The sliding plate has a lubricating coating of a composition comprising an epoxy resin, a curing agent, a reactive silicone oil having an epoxy group, and triazine thiol on the surface, and the sliding member has the composition on the surface of the surface layer material. The sliding seismic isolation device according to claim 5, wherein the sliding seismic isolation device is slidably in contact with the sliding plate through a lubricating film of the object.   The composition constituting the lubricating coating comprises 100 parts by weight of the sum of the epoxy resin and the curing agent, and 2 to 30 parts by weight of the sum of the reactive silicone oil having an epoxy group and triazine thiol. Sliding seismic isolation device.   The blending weight ratio of the epoxy resin and the curing agent is (epoxy resin) :( curing agent) = E: 10 to E: 300, where E is the epoxy equivalent of the epoxy resin. Sliding seismic isolation device.   The blending weight ratio of the reactive silicone oil having an epoxy group and the triazine thiol is (triazine thiol) / (reactive silicone oil having an epoxy group) = 0.03 to 1. 9. The sliding seismic isolation device as described in the paragraph.

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