JP2004249574A - Method for producing conveyance tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a conveyance tool which has enough elasticity and prevents the contact trace of the work holding surface of the conveyance tool from being left on the surface of a work. <P>SOLUTION: In the method for producing a conveyance tool 10, a substrate 2 is made of a cured elastomer, and a resin sheet 3 is laminated on the cured elastomer on at least the work holding surface in the substrate 2. After at least one surface of the resin sheet 3 is reformed by discharge treatment in a prescribed gas atmosphere, a joining reinforcing agent is applied on the reformed surface. After that, an unvulcanized elastomer composition containing a vulcanizing agent is heated/pressurized in a mold while being contacted with the joining reinforcing agent application surface of the resin sheet 3 so that the resin sheet 3 and the cured elastomer are joined to be integrated to mold the conveyance tool 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a transfer tool for transferring various works. More specifically, the present invention relates to a method of manufacturing a carrier in which a substrate of a carrier is formed of a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate.
[0002]
[Prior art]
In recent years, transport belts and suction cups having projections on the belt surface have been used for transporting panels in the manufacturing process of liquid crystal display devices, transporting glass for automobiles, and the like. It consists of a body.
[0003]
On the other hand, there has been proposed a technique of bonding a fluororesin sheet to a soft vinyl chloride resin, a polyethylene resin, a urethane resin, or a stainless steel plate by using a discharge treatment (for example, see Patent Documents 1 and 2).
[0004]
[Patent Document 1]
JP-A-10-273546 (pages 3 to 4)
[Patent Document 2]
JP-A-10-306166 (pages 3-4)
[0005]
[Problems to be solved by the invention]
In a conventional carrier, it is inevitable that components such as a vulcanizing agent and a wax contained in the cured elastomer are adhered to the work. For this reason, there is a problem that a trace of the contact of the workpiece holding surface of the transfer tool is left on the workpiece surface.
[0006]
Here, the inventor of the present application proposes that the base of the carrier is made of an elastomer cured body, while at least the work holding surface is laminated with a resin sheet on the base.
[0007]
That is, an object of the present invention is to provide a method of manufacturing a carrier having sufficient elasticity and having no trace of contact of a work holding surface of the carrier with a work surface.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, a carrier in a carrier is constituted by a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate. In a manufacturing method, at least one surface of a resin sheet is modified by a discharge treatment in a predetermined gas atmosphere, and then the uncured vulcanizing agent containing a vulcanizing agent is applied to the modified surface via a bonding reinforcing agent. The method is characterized in that the resin sheet and the cured elastomer are joined and integrated by heating and pressurizing the sulfurated elastomer composition in a stacked state, and the carrier is molded.
[0009]
For example, in a method of manufacturing a carrier in which a substrate in a carrier is formed of a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate, at least one of the resin sheets is provided. After the surface is modified by a discharge treatment under a predetermined gas atmosphere, a bonding reinforcing agent is applied to the modified surface, and thereafter, an unvulcanized elastomer composition containing a vulcanizing agent is bonded to the resin sheet for reinforcement. The resin sheet and the cured elastomer are joined and integrated by applying heat and pressure while in contact with the agent application surface, and the carrier is molded.
[0010]
Here, at least one surface of the fluorine-based resin sheet as a resin sheet is placed in a gas atmosphere at 0.1 to 1.1 kg / cm. ² After modified by low-temperature plasma treatment under the pressure of, a silane coupling agent as a bonding reinforcing agent is applied to the modified surface of the fluororesin sheet, and thereafter, an unvulcanized elastomer composition containing a vulcanizing agent It is preferable that the article is heated and pressurized while being in contact with the surface of the fluororesin sheet on which the silane coupling agent is applied, so that the fluororesin sheet and the cured elastomer are joined and integrated, and the carrier is molded.
[0011]
According to another aspect of the present invention, in a method of manufacturing a carrier for transporting a workpiece, an elastomer cured body constituting a substrate in the carrier, and the elastomer cured body laminated on at least a workpiece holding surface of the substrate. In manufacturing the carrier with a composite material including a resin sheet, at least one surface of the resin sheet is modified by a discharge treatment under a predetermined gas atmosphere, and an unvulcanized material containing a bonding reinforcing agent and a vulcanizing agent is modified. By heating and pressing the elastomer composition in contact with the modified surface of the resin sheet, the resin sheet and the cured elastomer are joined and integrated, and the carrier is molded.
[0012]
Here, at least one surface of the fluororesin sheet is placed in a gas atmosphere at 0.1 to 1.1 kg / cm. ² After reforming by low-temperature plasma treatment under pressure, a silane coupling agent as a bonding reinforcing agent, and an unvulcanized elastomer composition containing a vulcanizing agent in contact with the modified surface of the fluororesin sheet It is preferable that the fluororesin sheet and the cured elastomer are joined and integrated by heating and pressurizing, and the carrier is molded.
[0013]
In the present invention, for example, a transport belt having a projection that constitutes the work holding surface on a belt surface, or a suction cup having a suction surface serving as the work holding surface is manufactured as the transfer tool.
[0014]
The carrier according to the present invention has elasticity as the carrier because the base is made of the cured elastomer, and the resin sheet is laminated on the surface of the cured elastomer at least on the work holding surface. Therefore, when the workpiece is held, the workpiece does not come into contact with the elastomer cured body, so that the components contained in the elastomer cured body do not adhere to the workpiece, and a trace of the contact of the workpiece holding surface of the transfer tool on the workpiece surface. There is no sticking. Further, in the present invention, the surface of the resin sheet is modified by a discharge treatment under a predetermined gas atmosphere, and a bonding reinforcing agent such as a silane coupling agent or an adhesive is used. With the vulcanized elastomer composition in contact with the surface of the resin sheet, it is heated and pressed in a mold, or rolled with a roll or the like, and then simply heated, and the resin sheet and the cured elastomer are firmly joined and integrated. be able to. Therefore, even when stress is repeatedly applied to the carrier, the resin sheet does not peel off from the cured elastomer.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0016]
[Embodiment 1]
1 (A) and 1 (B) are explanatory views of a carrier according to Embodiment 1 of the present invention.
[0017]
1A and 1B is a transport belt having a belt surface 11 provided with a projection 12 that forms a work holding surface. In this carrier 10, the base 2 constituting the belt portion 13 and the projections 12 is made of an elastomer cured body such as chloroprene rubber, silicon rubber, IIR, EPDM, NBR, or fluoro rubber, and the entire upper surface of the belt has A resin sheet 3 such as a fluorine-based resin sheet is laminated on the surface of the cured elastomer including the protrusion 12.
[0018]
[Embodiment 2]
2A and 2B are a cross-sectional view and a bottom view, respectively, of a carrier according to Embodiment 2 of the present invention.
[0019]
As shown in FIG. 2, the transfer tool 20 of the present embodiment is a suction cup in which the suction surface 21 serves as a work holding surface. The transfer tool 20 includes a circular suction part 22 serving as a work holding surface, and a cylindrical part 23 extending upward from the suction part 22. A hole of the cylindrical part 23 is provided at a central position of the suction part 22. Is formed. A plurality of ribs 25 are formed around the hole 24 of the suction cup 22 so that air flows smoothly.
[0020]
In the present embodiment, the carrier 20 is such that the base 2 having the suction cup 22 and the cylindrical section 23 is made of an elastomer cured body such as chloroprene rubber, silicon rubber, IIR, EPDM, NBR, or fluororubber, and On the inner surface of the portion, a resin sheet 3 such as a fluororesin sheet is laminated on the surface of the cured elastomer.
[0021]
[Embodiment 3]
FIG. 3 is an explanatory diagram schematically showing a carrier according to Embodiment 3 of the present invention.
[0022]
As shown in FIG. 3, the conveying tool 30 of the present embodiment is a belt having a hexagonal cross section whose upper surface is a work holding surface 31, and the base 2 constituting the belt body 32 is made of chloroprene rubber, silicon rubber, IIR, EPDM. , NBR, a fluoroelastomer or the like, and a resin sheet 3 such as a fluororesin sheet is laminated on the surface of the elastomer cured body on a work holding surface 31 composed of an upper surface thereof.
[0023]
[First manufacturing method]
In manufacturing such a carrier, in this embodiment, at least one surface of the resin sheet is modified by a discharge treatment under a predetermined gas atmosphere, and then a silane coupling agent is applied to the modified surface with a bonding reinforcing agent. Then, after that, the uncured elastomer composition containing the vulcanizing agent is heated and pressurized in a mold in a state of being in contact with the joining reinforcing agent applied surface of the resin sheet, so that the resin sheet and the cured elastomer are formed. In addition to joining and integrating, the carrier is molded. Specifically, at least one surface of the fluorine-based resin sheet as the resin sheet is placed in a gas atmosphere at 0.1 to 1.1 kg / cm. ² After modified by low-temperature plasma treatment under the pressure of, a silane coupling agent as a bonding reinforcing agent is applied to the modified surface of the fluororesin sheet, and thereafter, an unvulcanized elastomer composition containing a vulcanizing agent The product is heated and pressurized in a mold while being in contact with the surface of the fluororesin sheet on which the silane coupling agent is applied, whereby the fluororesin sheet and the cured elastomer are joined and integrated, and the carrier is formed.
[0024]
The low-temperature plasma treatment performed here is a treatment performed using plasma generated in a region where the electron temperature is high but the gas temperature is low (also referred to as non-equilibrium plasma). This is a technique in which radicals, vacuum ultraviolet rays, and the like are applied to the material surface to perform surface modification such as etching, implantation, and radical generation to activate the surface. At the time of this implantation, functional groups such as a hydroxyl group, a carbonyl group, and a carboxyl group are introduced into the surface of the material, and the effects of improving adhesion and improving wettability can be obtained. These act on the silane coupling agent and the vulcanizing agent of the unvulcanized elastomer composition to not only significantly improve the adhesiveness but also generate a strong composite interface that can withstand various stresses.
[0025]
Examples of the gas used for the low-temperature plasma treatment include an inert gas such as He, Ar, Ne, Kr, and Xe; ₂ , CO and other carbon oxide gases, O ₂ Oxidizing gas such as CF ₄ And the like, a gas of a polymerizable unsaturated compound such as ethylene and propylene, and air. These are appropriately selected according to the purpose, and used alone or in combination. However, in the present invention, the low-temperature plasma treatment is performed at 0.1 to 1.1 kg / cm. ² In particular, it is preferable to use a mixed gas obtained by combining an inert gas, a carbon oxide gas, and a polymerizable unsaturated compound gas. ₂ It is preferable to use a mixed gas of ethylene and ethylene.
[0026]
When a mixed gas is used, it is preferable to mix 1 to 15 mol of the polymerizable unsaturated compound gas and 1 to 20 mol of the carbon oxide gas with respect to 100 mol of the inert gas. 3 to 10 moles of the polymerizable unsaturated compound gas and 1 to 12 moles of the carbon oxide gas are mixed with 100 moles of the gas. This is because when the blending ratio of the polymerizable unsaturated compound gas and the carbon oxide gas increases, the initial discharge voltage increases and the discharge treatment becomes difficult.
[0027]
The discharge treatment is performed by exposing the surface of the resin sheet to be treated in a predetermined gas atmosphere, and applying a high-frequency voltage of, for example, 3 to 40 kHz between the electrodes. The temperature during the discharge treatment is not particularly limited, but is usually preferably in the range of 10 to 80 ° C, and more preferably in the range of 25 to 60 ° C.
[0028]
In the present invention, the low-temperature plasma treatment is performed at 0.1 to 1.1 kg / cm. ² This is performed under the following pressure for the following reason. That is, 0.1 kg / cm ² If it is attempted to perform the process under a pressure lower than that, a special device is required because the system must be kept in a vacuum, and the equipment cost increases and the gas density decreases, so that a uniform and sufficient reformed surface cannot be obtained. Because. On the other hand, 1.1 kg / cm ² If it exceeds, no further processing effect can be obtained despite the increased gas consumption, which is not economical.
[0029]
In the carrier manufactured in this way, since the base is composed of the cured elastomer, the carrier has elasticity as a carrier, and at least on the work holding surface, the resin sheet is laminated on the surface of the elastomer cured body. I have. Therefore, when the workpiece is held, the workpiece does not come into contact with the elastomer cured body, so that the components contained in the elastomer cured body do not adhere to the workpiece, and a trace of the contact of the workpiece holding surface of the transfer tool on the workpiece surface. There is no sticking.
[0030]
Also, in manufacturing the carrier, the surface of the resin sheet was modified by low-temperature plasma treatment under a predetermined gas atmosphere, and a bonding reinforcing agent such as a silane coupling agent or an adhesive was used. The resin sheet and the cured elastomer can be firmly joined and integrated only by heating and pressing in a mold while the unvulcanized elastomer composition containing the agent is in contact with the surface of the resin sheet. Therefore, even when stress is repeatedly applied to the carrier, the resin sheet does not peel off from the cured elastomer. In addition, even if the unvulcanized elastomer composition containing the vulcanizing agent is rolled with a roll or the like in a state of being in contact with the surface of the resin sheet, and then heated, the resin sheet and the cured elastomer can be strongly bonded and integrated. Can be.
[0031]
In such a carrier, it is preferable to use a sheet-like fluorine-based resin sheet as the resin sheet. The fluororesin sheet is excellent in weather resistance, stain resistance, slidability, chemical resistance, heat resistance, and hot water resistance. If necessary, various fillers (such as graphite, short fibers such as carbon and glass, and molybdenum disulfide) may be blended. In particular, when characteristics such as folding resistance and high tear strength are required, it is preferable to select these other components in consideration of these.
[0032]
Specific examples of the fluorine-based resin include ethylene tetrafluoride (PTFE), ethylene tetrafluoride-ethylene copolymer (ETFE), ethylene tetrafluoride-perfluoroalkyl vinyl ether copolymer (PFA), and trifluorinated chloride. There are ethylene (PCTFE), propylene hexafluoride copolymer (FEP), and the like. Among them, ETFE and PFA are particularly preferable from the viewpoints of easy handling, availability, and price.
[0033]
Examples of the unvulcanized elastomer composition include a composition obtained by blending an uncured elastomer component, a vulcanizing agent, and an appropriate filler if necessary. As the elastomer component, various types are used, and chloroprene rubber, silicon rubber, IIR, EPDM, NBR, fluororubber and the like are suitable.
[0034]
Examples of the vulcanizing agent used in combination with the elastomer component include an organic peroxide, a metal oxide, and a polyol. Various organic peroxides are used, and among them, dialkyl peroxides are preferable.
[0035]
Specific examples of the dialkyl peroxide include di-t-butyl peroxide, di-t-amyl peroxide, t-butyl cumyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5- Di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane- (3), α, α′-bis (t-butylperoxy) diisopropylbenzene, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,3-bis (t-butylperoxyisopropyl) benzene, n-butyl-4,4-bis (t-butyl) Peroxy) valerate, 2,2-bis (4,4-di-t-butylperoxycyclohexyl) propane, 2,2-bis- (t-butylperoxy) butane, 1,1 Di - (t-butylperoxy) cyclohexane, and the like. Among them, dicumyl peroxide and 2,5-dimethyl-2,5-di (t-butylperoxy) hexane are particularly preferred because they are relatively easy to handle and generally available. As the metal oxide, ZnO, MgO, PbO, PbO ₃ O ₄ And the like.
[0036]
Further, specific examples of the silane coupling agent (bonding reinforcing agent) applied to the modified surface of the resin sheet obtained by the low-temperature plasma treatment include γ-methacryloxypropyltriethoxysilane and γ-methacryloxypropylmethyldimethoxysilane. Γ-methacryloxypropylmethyldiethoxysilane, γ-methacryloxypropylmethoxysilane, N-β- (aminoethyl) γ-aminopropyltrimethoxysilane, N-β- (aminoethyl) γ-aminopropylmethyldimethoxysilane , N-β- (aminoethyl) γ-aminopropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxypropyl propyltrimethoxysilane, γ-glycidoxypropylmethyldi Ethoxysilane, γ-glycidoxypro Pilltriethoxysilane, vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-isocyanatopropyltriethoxysilane, and the like. However, among these silane coupling agents, amino-functional silane compounds are effective adhesion promoters. However, when they are used in large amounts, they will cause significant discoloration when continuously exposed to high temperatures of about 100 ° C. In addition, it is preferable not to use it alone as much as possible, since the curing force deteriorates and the adhesive strength decreases. Further, the use of isocyanate-based silane coupling can provide a bonding surface having a high strength that is substantially constant or higher irrespective of the material to be bonded and the bonding mode, and is therefore suitable for a wide range of applications.
[0037]
These silane coupling agents may be used as they are, or when they are difficult to use as they are, they may be diluted with water, a solvent, or the like from the viewpoint of coating workability. In this case, the dilution ratio depends on the type of the silane coupling agent and the type of the elastomer component to be bonded, but is preferably set to 1.1 to 20 times in terms of workability.
[0038]
The amount of the silane coupling agent (including the diluent) applied to the modified surface of the resin sheet is not particularly limited, but is usually 10 to 40 g / m2. ² It is preferable to set That is, the application amount is 10 g / m ² If the amount is less, the adhesive strength is difficult to stabilize, and conversely, 40 g / m ² This is because, when the pressure exceeds the limit, in injection molding or compression molding, pressure may cause oozing in a direction parallel to the application surface, thereby contaminating the molding die and hindering removal of the molded product.
[0039]
The method for applying the silane coupling agent is not particularly limited, and any application method may be used. However, spray application is preferred in terms of uniform application.
[0040]
Usually, when a silane coupling agent is used to reinforce the bonding between two materials, apply the silane coupling agent to one material surface, dry the applied surface, and then join the other material. Generally, in the present invention, in a state where the silane coupling agent applied to the modified surface of the resin sheet is undried, the surface is immediately brought into contact with the unvulcanized elastomer composition and heated. Alternatively, it is preferable that both are integrally formed by heating and pressing, since a bonding interface with higher strength can be obtained.
[0041]
That is, in order to join the resin sheet and the cured elastomer at a high strength, the wettability of the unvulcanized elastomer composition to the resin sheet is considered to have a great effect. When it is brought into contact with the vulcanized elastomer composition as it is and molded and integrated in one step by heating or heating and pressurizing, the silane coupling agent wets the modified surface of the resin sheet under the contact pressure of the unvulcanized elastomer composition. And the wetting of the silane coupling agent to the unvulcanized elastomer composition is simultaneously realized, and at this time, the silane coupling agent and the unvulcanized elastomer composition come into contact with each other and the flow of the unvulcanized elastomer composition Are mixed and diffused with each other. As a result, the interface of the low-temperature plasma-treated surface / silane coupling agent / unvulcanized elastomer composition is crosslinked by the action of the vulcanizing agent in a state where the three components coexist, and an unprecedented high-strength bonding interface is obtained. it is conceivable that.
[0042]
The “undried state” of the silane coupling agent means a state immediately after the application operation without leaving the silane coupling agent applied surface for drying or subjecting the silane coupling agent to air drying or the like.
[0043]
Of the silane coupling agents described above, methacryloxy-based silane coupling agents containing a methacryloxy group are generally prepared by preparing an aqueous solution thereof, spraying the prepared solution on a target surface, and drying it to effect a coupling effect. In the present invention, the methacryloxy-based silane coupling agent is applied as it is to the modified surface of the resin sheet as it is in the form of an undiluted solution. A suitable bonding interface can be formed. In addition, according to the methacryloxy-based silane coupling agent, the process can be greatly simplified, and a product excellent in bonding strength can be obtained. It is considered that this is because the methacryloxy group of the methacryloxy-based silane coupling agent is directly supplied to the modified surface without hydrolysis and directly participates in crosslinking via the vulcanizing agent.
[0044]
In the present invention, the heating or heating and pressurizing conditions for curing the unvulcanized elastomer composition depend on the type of the elastomer composition and the size and thickness of the target cured product, but usually, the heating temperature is set to a predetermined value. It is preferable that the heating temperature is 120 to 180 ° C. and the heating time is 1 to 60 minutes. The pressurizing condition is appropriately set according to the type of the molding apparatus and the like.
[0045]
The molding apparatus is not particularly limited, but a general injection molding machine, a pressure molding machine, or the like can be used.
[0046]
In the carrier thus obtained, even when a fluorine-based resin sheet is used as the resin sheet, a dense and uniform surface treatment by a low-temperature plasma treatment performed in a special pressure range, and a silane coupling agent Combined with the composite crosslinking effect with the vulcanizing agent contained in the unvulcanized elastomer composition, the bonding surface between the fluororesin sheet and the cured elastomer is integrated with an unprecedented high strength. You.
[0047]
[Modification of First Manufacturing Method]
In the first manufacturing method, after the resin sheet is modified by electric discharge treatment, a bonding reinforcing agent is applied to the modified surface. However, the bonding reinforcing agent is applied to the unvulcanized elastomer composition containing the vulcanizing agent. , An unvulcanized elastomer composition containing a vulcanizing agent may be overlaid on the modified surface of the resin sheet via a bonding reinforcing agent, and then heated and pressed.
[0048]
[Second manufacturing method]
In manufacturing the carrier described with reference to FIGS. 1 and 2, at least one surface of the resin sheet is modified by a discharge treatment under a predetermined gas atmosphere, and a silane coupling agent as a bonding reinforcing agent is used. By heating and pressurizing the unvulcanized elastomer composition containing the vulcanizing agent in the mold while in contact with the modified surface of the resin sheet, the resin sheet and the cured elastomer are joined and integrated, The carrier may be formed. Specifically, at least one surface of the fluororesin sheet is placed in a gas atmosphere at 0.1 to 1.1 kg / cm. ² After reforming by low-temperature plasma treatment under pressure, a silane coupling agent as a bonding reinforcing agent, and an unvulcanized elastomer composition containing a vulcanizing agent in contact with the modified surface of the fluororesin sheet By heating and pressurizing in a mold, the fluororesin sheet and the cured elastomer are joined and integrated, and the carrier is formed.
[0049]
In this case, the above-mentioned thing can be used as a silane coupling agent. However, in the case of applying a silane coupling material, in consideration of the application workability, in addition to using the silane coupling agent as it is, there is a case where a solvent-diluted material is used. When the silane coupling agent is contained in the vulcanized elastomer composition, the silane coupling agent may be blended without dilution.
[0050]
Here, the compounding ratio of the silane coupling agent is not particularly limited, but particularly, 0.1 to 2.0 parts by weight based on 100 parts by weight of the unvulcanized elastomer composition (hereinafter abbreviated as “parts”). It is preferable to set to zero. That is, if the compounding ratio is less than 0.1 part, the bonding interface strength of the obtained composite material may not be stable, and if it exceeds 2.0 parts, the mechanical strength of the elastomer cured product in the obtained composite material may be reduced. This is because the characteristics may be impaired.
[0051]
[Another manufacturing method]
In the above embodiment, the low-temperature plasma treatment was performed as the discharge treatment, but a discharge treatment in a mixed gas composed of an argon gas, a nitrogen gas, and a carbon dioxide gas may be used. Here, the role of the argon gas is to remove deteriorating substances on the surface of the fluororesin sheet and activate the surface while suppressing the main chain breakage of the fluororesin, thereby causing a reaction by nitrogen gas and carbon dioxide gas. . The role of the nitrogen gas and the carbon dioxide gas is to effectively introduce an oxygen-containing functional group and a nitrogen-containing functional group into the discharge treated surface. The composition of the mixed gas is preferably 1 to 10 mol of nitrogen gas and 1 to 15 mol of carbon dioxide gas with respect to 100 mol of argon gas, and most preferably 3 to 10 mol of nitrogen gas with respect to 100 mol of argon gas. 5 moles and carbon dioxide gas is 3 to 10 moles. When the amounts of the nitrogen gas and the carbon dioxide gas are larger than those of the argon gas, the initial discharge voltage becomes higher, and it becomes difficult to perform the discharge treatment. In addition, if air is mixed in this atmosphere, it becomes difficult to discharge, so it is necessary to avoid air.
[0052]
Further, a discharge treatment in a mixed gas of an inert gas, a polymerizable unsaturated compound gas and a carbon oxide gas may be used. In this case, the role of the inert gas is to stabilize the discharge, remove deteriorating substances on the surface of the fluorine-based resin sheet, and activate the surface of the fluorine-based resin sheet while suppressing the breakage of the polymer main chain, thereby polymerizing the unsaturated resin. It is to cause a reaction by the compound gas and the carbon oxide gas. In this case, examples of the inert gas include helium gas, argon gas, neon gas, krypton gas, xenon gas, and radon gas. Helium gas and argon gas are preferable, and argon gas is particularly preferable. Examples of the polymerizable unsaturated compound gas include a compound gas having a double bond such as ethylene gas and propylene gas, and ethylene gas is preferable. Further, as the carbon oxide gas, the role of effectively introducing an oxygen functional group into the surface polymer is carbon dioxide gas, carbon monoxide.In particular, the carbon dioxide gas is firmly attached to the surface of the fluororesin sheet. This is preferable because a surface reactant that adheres can be obtained. The composition of the mixed gas is preferably 1 to 15 mol of the polymerizable unsaturated compound gas and 1 to 20 mol of the carbon oxide gas with respect to 100 mol of the inert gas, and most preferably 100 mol of the inert gas. The amount of the polymerizable unsaturated compound gas is 3 to 10 mol and the amount of the carbon oxide gas is 1 to 12 mol with respect to the mol. When the amount of the polymerizable unsaturated compound gas and the amount of the carbon oxide gas are larger than the amount of the inert gas, the initial discharge voltage becomes higher and the discharge treatment becomes difficult. In addition, if air is mixed in this atmosphere, it becomes difficult to discharge, so it is necessary to avoid air.
[0053]
Further, as the discharge treatment, corona discharge (spark discharge), glow discharge, or the like can be applied in addition to plasma discharge. In either case, the treatment surface is exposed to a gas atmosphere, and a discharge treatment is performed by applying a high-frequency voltage of 3 kHz to 40 kHz between the electrodes. The form of the discharge varies depending on the composition of the mixed gas. As described above, when the amount of the nitrogen gas and the amount of the carbon dioxide gas with respect to the argon gas increase, the plasma discharge or the glow discharge changes to a corona discharge (spark discharge). The pressure during the M discharge treatment is not particularly limited as long as the mixed gas can be maintained in a gaseous state, but is usually 0.9 to 1.1 kg / cm. ² If it is in the range, Since the surface treatment is performed under atmospheric pressure, it is preferable in that an expensive device is not required. The temperature during the discharge treatment is not particularly limited, but may be generally in the range of 10 to 80 ° C, and preferably in the range of 25 to 60 ° C.
[0054]
In the above embodiment, a silane coupling agent was used as a bonding reinforcing agent, but a polyester adhesive, a urethane adhesive, an epoxy adhesive, a nylon adhesive, an ethylene-vinyl acetate adhesive, an acrylic adhesive An adhesive such as an adhesive or a rubber-based adhesive may be used.
[0055]
Note that the present invention may be applied to a workpiece holding portion of a robot hand in the above embodiment as a carrier.
[Brief description of the drawings]
FIGS. 1A and 1B are explanatory views schematically showing a transport tool according to a first embodiment of the present invention.
FIGS. 2A and 2B are a cross-sectional view and a bottom view, respectively, schematically showing a carrier according to a second embodiment of the present invention.
FIG. 3 is an explanatory view schematically showing a carrier according to a third embodiment of the present invention.
[Explanation of symbols]
2 Substrate
3 resin sheet
10, 20, 30 Carrier
11 Belt surface
12 Projection that constitutes work holding surface
13 Belt part
21 Suction surface
22 Sucker
23 cylindrical part
24 holes
25 ribs
31 Work holding surface
32 Belt body

Claims (5)

A method for manufacturing a carrier in which a substrate in a carrier is formed of a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate,
After modifying at least one surface of the resin sheet by a discharge treatment under a predetermined gas atmosphere, an unvulcanized elastomer composition containing a vulcanizing agent is laminated on the modified surface via a bonding reinforcing agent. And heating and pressurizing in a state where the resin sheet and the cured elastomer are joined and integrated, and the carrier is molded. A method for manufacturing a carrier in which a substrate in a carrier is formed of a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate,
After modifying at least one surface of the resin sheet by a discharge treatment under a predetermined gas atmosphere, a bonding reinforcing agent is applied to the modified surface, and thereafter, an unvulcanized elastomer composition containing a vulcanizing agent is prepared. By heating and pressurizing the resin sheet in contact with the joint reinforcing agent applied surface thereof, the resin sheet and the elastomer cured body are joined and integrated, and the carrier is molded. Production method. A method for manufacturing a carrier in which a substrate in a carrier is formed of a cured elastomer, and a resin sheet is laminated on the cured elastomer at least on a work holding surface of the substrate,
At least one surface of the resin sheet is modified by a discharge treatment under a predetermined gas atmosphere, and an unvulcanized elastomer composition containing a bonding reinforcing agent and a vulcanizing agent is in contact with the modified surface of the resin sheet. A method for manufacturing a carrier, wherein the resin sheet and the cured elastomer are joined and integrated by heating and pressing, and the carrier is molded. The method for manufacturing a transport tool according to any one of claims 1 to 3, wherein the transport tool includes a transport belt having a projection on the belt surface that constitutes the work holding surface. 4. The method for manufacturing a transport tool according to claim 1, wherein a suction cup having a suction surface serving as the work holding surface is formed as the transport tool.

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