WO2015098431A1 - Method of producing elastomer body covered with covering layer - Google Patents

Method of producing elastomer body covered with covering layer Download PDF

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Publication number
WO2015098431A1
WO2015098431A1 PCT/JP2014/081681 JP2014081681W WO2015098431A1 WO 2015098431 A1 WO2015098431 A1 WO 2015098431A1 JP 2014081681 W JP2014081681 W JP 2014081681W WO 2015098431 A1 WO2015098431 A1 WO 2015098431A1
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WO
WIPO (PCT)
Prior art keywords
elastomer
coating layer
elastomer body
coating material
coating
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PCT/JP2014/081681
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French (fr)
Japanese (ja)
Inventor
倉持　浩
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株式会社ポリテック・デザイン
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Publication of WO2015098431A1 publication Critical patent/WO2015098431A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/003—Thermoplastic elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
    • B29L2031/5281—Articles for amusement
    • B29L2031/529—Toys

Definitions

  • the present invention relates to a method for producing an elastomer body coated with a coating layer, which is obtained by coating an elastomer body mainly composed of an elastomer such as rubber or thermoplastic elastomer with coating layers having different compositions.
  • a coating layer which is obtained by coating an elastomer body mainly composed of an elastomer such as rubber or thermoplastic elastomer with coating layers having different compositions.
  • NR natural rubber
  • IR isoprene rubber
  • BR rubber
  • One method is, for example, a method of coating the surface of a crosslinked (vulcanized) elastomer body with an elastomer having a different composition, as disclosed in Patent Document 1.
  • Another method is to laminate an uncrosslinked elastomer with a different composition to be a coating layer on the surface of the uncrosslinked elastomer to be formed into an elastomer body, and then heat-press both to crosslink.
  • crosslinking / molding of the elastomer body and crosslinking / formation of the coating layer are simultaneously performed.
  • an uncrosslinked elastomer having a different composition to be a coating layer is laminated in a sheet shape on the surface of the uncrosslinked elastomer to be formed into the conventional elastomer body, and both are hot-pressed to be crosslinked.
  • the uncrosslinked elastomer that is to be formed into an elastomer body by hot pressing flows in the surface direction and should become the coating layer. The sheet-like elastomer was cut.
  • the thickness of the elastomer to be the coating layer is increased, when the uncrosslinked elastomer that is to be formed into the elastomer body by hot pressing flows in the surface direction, the elastomer to be the coating layer As a result, the film layer is washed away by the stress, resulting in a problem that the resulting coating layer is uneven in thickness and insufficient in quality.
  • the present invention has been made in view of such conventional circumstances, and one of the objects of the present invention is a coating layer that can firmly bond an elastomer coating layer having a different composition to the surface of the elastomer body.
  • the object is to provide a method for producing a coated elastomer body.
  • Another object of the present invention is to provide a method for producing an elastomer body coated with a coating layer, which can form an elastomer coating layer having a different composition on the surface of the elastomer body with a uniform thickness.
  • the method for producing an elastomer body coated with a coating layer comprises: A method for producing an elastomer body coated with a coating layer, wherein the surface of an elastomer body mainly composed of an elastomer is coated with a coating layer having a different composition, As a coating material for forming the coating layer, when heated and pressurized in contact with an uncrosslinked elastomer to be molded into the elastomer body, the elastomer body side elastomer at the interface with the elastomer body Providing a material comprising an elastomer that will be co-crosslinked; Dissolving the coating material in a solvent to form a liquid or paste; Applying the liquid or paste-like coating material onto a film-like body made of an elastomer to be molded into the elastomer body and a material having a melting point higher than the crosslinking temperature of the elastomer contained in the coating material When, In the mold, the
  • the elastomer to be molded into the elastomer body and the coating material are both crosslinked in an uncrosslinked state by heating and pressurizing, and at the interface between the elastomer body and the coating layer, Since the elastomer body side elastomer and the elastomer contained in the coating layer are co-crosslinked, the coating layer can be firmly bonded to the elastomer body.
  • the coating material is applied to the film-like body, the film-like body is covered even when uncrosslinked elastomer that will be molded into the elastomer body flows in the surface direction during heating and pressurization. Since the flow resistance acts on the material, the coating material does not flow together. Therefore, even if the thickness of the coating material layer is reduced, it does not break. A simple coating layer is formed.
  • the thickness of the coating layer in the present invention is preferably It may be 500 micrometers ( ⁇ m) or less, more preferably 100 micrometers or less, and even more preferably 50 micrometers or less.
  • the film-like body is melted when the elastomer is crosslinked. There is nothing.
  • the method for producing an elastomer body coated with the coating layer of the present invention comprises: (A) The elastomer coating layer having a different composition can be firmly bonded to the surface of the elastomer body. (B) The elastomer coating layer having a different composition can be formed on the surface of the elastomer body with a uniform thickness. It is possible to obtain excellent effects such as.
  • Example 1 of this invention it is sectional drawing which shows the state which apply
  • molded by the elastomer body are bridge
  • Example 1 it is sectional drawing which shows a mode that a film-like body is peeled from the coating layer formed in the surface of the elastomer body by which the crosslinking shaping
  • the said Example 1 it is sectional drawing which shows the elastomer body coat
  • FIG. 7 is a sectional view taken along line VII-VII in FIG. 6.
  • Example 8 of this invention it is sectional drawing which shows the state which is performing the shaping
  • Example 9 of this invention it is sectional drawing which shows the state which apply
  • Example 9 it is sectional drawing which shows the state which accumulated the film-form body by which the coating material was apply
  • sectional drawing which shows the state which is carrying out the shaping
  • Example 9 it is sectional drawing which shows a mode that a film-like body is peeled from the coating layer formed in the surface of the elastomer body by which crosslinking molding was carried out.
  • Example 13 of this invention it is a top view which shows the state which apply
  • elastomer constituting the elastomer body in the present invention basically any type of elastomer such as rubber or thermoplastic elastomer can be used.
  • the coating material needs to contain an elastomer that co-crosslinks with the elastomer-side elastomer at the interface with the elastomer body.
  • an elastomer that co-crosslinks with the elastomer-side elastomer at the interface with the elastomer body in order to give the coating layer desired functions such as adhesiveness, conductivity, hydrophilicity, weather resistance, oil resistance, lubricity, water repellency, gas barrier properties, high friction, low friction, etc.
  • a function-imparting material other than an elastomer is contained (of course, when the elastomer itself has a necessary function, it is not necessary to add a function-imparting material).
  • a resin sheet such as PET (polyethylene terephthalate), OPP (stretched polypropylene), nylon, PVA (polyvinyl alcohol), a film, a metal stay, or the like can be used.
  • a solvent for dissolving the coating material for example, toluene, cyclohexane, or a mixture of these with acetone can be used.
  • the operation of applying the coating material in a liquid or paste form to the film-like body can be performed by an appropriate means such as a coater, spray, or printing.
  • Embodiment 1 of the present invention is applied to the production of a rubber sheet for table tennis rackets.
  • the compound 1 ′ molded into the elastomer body 1 was obtained by blending a reinforcing material, a crosslinking agent and other additives with natural rubber (NR).
  • the coating material 2 ' was prepared by blending a reinforcing material and other additives with EPDM (ethylene-propylene-diene rubber). PET was used as the film-like body 3, and toluene was used as the solvent for dissolving the coating material 2 '.
  • EPDM ethylene-propylene-diene rubber
  • the coating material 2 ' was dissolved in a solvent to obtain a highly viscous liquid.
  • the liquid coating material 2 ′ is thinly applied to the film-like body 3 with a coater or the like, dried, and then accommodated in the lower mold 4 as shown in FIG. An uncrosslinked compound 1 ′ to be molded into the elastomer body 1 is placed.
  • the upper mold 5 is closed, and the compound 1 'and the coating material 2' applied to the film-like body 3 are heated and pressurized while being in contact with each other. Then, the natural rubber of the compound 1 ′ is cross-linked to be molded into a sheet-like elastomer body 1 and the EPDM of the coating material 2 ′ is cross-linked to form the coating layer 2, and at the interface between the elastomer body 1 and the coating layer 2 The natural rubber of the elastomer body 1 and the EPDM of the coating layer 2 are co-crosslinked.
  • FIG. 5 shows the elastomer body 1 covered with the coating layer 2 after the film-like body 3 is peeled off (in this embodiment, the elastomer body 1 covered with the coating layer 2 is a table tennis racket). For rubber sheet).
  • the compound body 1 ′ and the coating material 2 ′ are both cross-linked by heating and pressurizing in an uncrosslinked state, and the elastomer body 1. Since the natural rubber on the elastomer body 1 side and the EPDM on the coating layer 2 side are co-crosslinked at the interface between the coating layer 2 and the coating layer 2, the coating layer 2 can be firmly bonded to the elastomer body 1.
  • the coating material 2 ′ is applied to the film-like body 3, the film-like body 3 is covered even when the unvulcanized natural rubber of the compound 1 ′ flows in the surface direction during heating and pressurization. Since the flow resistance acts on the material 2 ′, the coating material 2 ′ does not flow together. Therefore, even if the layer of the coating material 2 ′ is thinned, it does not break, and is made thick to some extent. However, the coating layer 2 having a uniform thickness is formed.
  • the elastomer body 1 mainly consists of natural rubber, it can satisfy the high rebound resilience required for the table tennis racket rubber sheet.
  • the coating layer 2 made of EPDM covers the elastomer body 1, the disadvantage of the natural rubber of the elastomer body 1 that ozone resistance and weather resistance are poor can be solved.
  • isoprene rubber may be used instead of natural rubber.
  • This example is also an example in which the present invention is applied to the production of a rubber sheet for table tennis rackets.
  • the compound to be molded into the elastomer body was prepared by blending a natural rubber with a filler, a crosslinking agent, and other additives.
  • the coating material was IIR (butyl rubber) blended with polybutene and other additives.
  • Nylon 12 was used as the membrane, and toluene was used as the solvent for dissolving the coating material.
  • an elastomer body mainly composed of natural rubber coated with an IIR coating layer containing polybutene can be obtained (in this example, the coating was coated with this coating layer).
  • the elastomer body becomes a rubber sheet for table tennis rackets).
  • the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
  • the elastomer body is mainly made of natural rubber, it can satisfy the high resilience required for a rubber sheet for table tennis rackets, and the IIR coating layer containing polybutene is made of an elastomer body. Since it covers, the weather resistance can be improved and the surface can be made sticky to make it easier to rotate the ball.
  • isoprene rubber may be used instead of natural rubber.
  • This example is an example in which the present invention is applied to manufacture of a wiper blade.
  • the compound to be molded into the elastomer body was prepared by blending a natural rubber with a filler, a crosslinking agent, and other additives.
  • the coating material was obtained by blending PTFE (polytetrafluoroethylene) powder, graphite and other additives into natural rubber. PET was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
  • Example 2 By performing the same steps as in Example 1 (however, the mold is configured so that the elastomer body is formed into the shape of a wiper blade), natural coating coated with a natural rubber coating layer containing PTFE and graphite is used. An elastomer body mainly composed of rubber is obtained (in the case of this example, the elastomer body covered with this coating layer becomes a wiper blade).
  • the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
  • the coating layer containing PTFE and graphite covers the elastomer body, the lubricity can be improved.
  • This example is an example in which the present invention is applied to the production of a conductive elastomer.
  • the compound to be molded into the elastomer body was prepared by blending a reinforcing material, a crosslinking agent and other additives with EPDM (ethylene-propylene-diene rubber).
  • the coating material was prepared by blending EPDM with conductive carbon powder and other additives.
  • OPP was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
  • an elastomer body made of EPDM coated with a coating layer of EPDM dispersed with conductive carbon is obtained (in this example, the coating was coated with this coating layer).
  • the elastomer body becomes a conductive elastomer).
  • the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
  • the coating layer containing conductive carbon covers the elastomer body, conductivity can be obtained.
  • This example is an example in which the present invention is applied to the production of a sealing rubber for an electrolytic capacitor.
  • the compound to be molded into the elastomer body was obtained by blending EPDM with a reinforcing material, a crosslinking agent and other additives.
  • the coating material was a mixture of butyl rubber and mica and other additives.
  • Nylon 12 was used as the membrane, and toluene was used as the solvent for dissolving the coating material.
  • EPDM coated with a coating layer of butyl rubber containing mica by performing the same process as in Example 1 (where the mold is configured so that the elastomer body is molded into the shape of a sealing rubber of an electrolytic capacitor) (In the case of this example, the elastomer body covered with this coating layer becomes the sealing rubber).
  • the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
  • the coating layer of butyl rubber containing mica covers the elastomer body, the gas barrier property can be improved.
  • the elastomer body 1 is covered with a covering layer 2 for displaying pictures, photographs, characters and the like.
  • the compound to be molded into the elastomer body 1 was prepared by blending silica, a crosslinking agent and other additives into SBR (styrene butadiene rubber).
  • the coating material 2 ′ is a blend of titanium oxide (white pigment) and various pigments of various colors so that various colors can be obtained in SBR, and these are used as inks of various colors.
  • FIGS. 6 and 7 pictures, photographs, characters, etc. are printed on the film-like body 3.
  • PET was used as the film-like body 3
  • toluene was used as the solvent for dissolving the coating material 2 '.
  • the elastomer body 1 can be coated with the coating layer 2 displaying pictures, photographs, characters, and the like as shown in FIG.
  • the coating layer 2 is firmly bonded to the elastomer body 1. be able to. Further, the coating layer 2 having a uniform thickness can be obtained due to the presence of the film-like body 3 at the time of heating and pressing.
  • FIG. 9 shows Embodiment 7 of the present invention.
  • the surface of the film-like body 3 is roughened by embossing or the like.
  • a coating material is applied to the surface of the roughened film-like body 3, and thereafter the same process as in Example 1 is performed to obtain an elastomer body whose surface is coated with a roughened coating layer. be able to.
  • the bottom surface of the lower mold 4 is not flat but has a cross-sectional wave shape.
  • the operation of applying the coating material 2 ′ to the film-like body 3 and the operation of crosslinking the elastomer body 1 and the coating material 2 ′ are performed in the same manner as in the first embodiment.
  • FIG. 10 shows the molding and coating layer of the elastomer body 1 by cross-linking the uncrosslinked compound 1 ′ and the coating material 2 ′ to be molded into the elastomer body 1 by heating and pressing in the molds 4 and 5.
  • FIG. 11 shows the completed elastomer body 1 covered with the coating layer 2.
  • the surfaces of the coating layer 2 and the elastomer body 1 are molded into a shape along the bottom surface unevenness of the lower mold 4. Therefore, the surface of the elastomer body 1 has an uneven shape corresponding to the bottom surface of the lower mold 4.
  • the manufacturing method of the elastomer body 1 coated with the coating layer 2 according to the present invention forms the coating layer 2 with a uniform thickness even when the shape of the elastomer body 1 is complicated or the surface is uneven. can do.
  • Embodiment 9 of the present invention is an example in which a plurality of coating layers are used.
  • a first coating material 2a 'dissolved in a solvent to give a highly viscous liquid is thinly applied to the film-like body 3, dried, and then dissolved in a solvent to give a highly viscous liquid 2b. Apply a thin layer of 'on the first coating material 2a'.
  • the film-like body 3 in which the first and second coating materials 2a ′ and 2b ′ are applied in two layers is accommodated in the lower mold 4 as shown in FIG.
  • An uncrosslinked compound 1 ′ to be molded into the elastomer body 1 is placed thereon.
  • the upper mold 5 is closed, and the compound 1 'and the second coating material 2b' applied to the film-like body 3 are heated and pressurized while being in contact with each other. Then, the elastomer of the compound 1 ′ is cross-linked to be formed into a sheet-like elastomer body 1, and the elastomers of the first and second coating materials 2a ′ and 2b ′ are also cross-linked to form the first and second coating layers.
  • the elastomer on the elastomer body 1 side and the elastomer of the second coating layer 2b are co-crosslinked to form the first coating layer 2a.
  • the elastomer of the first coating layer 2a and the elastomer of the second coating layer 2b are co-crosslinked at the interface between the first coating layer 2b and the second coating layer 2b.
  • FIG. 16 shows the elastomer body 1 covered with the first and second coating layers 2a and 2b after the film-like body 3 is peeled off.
  • both the elastomer body 1 and the first coating layer 2a are not co-crosslinked between the elastomer body 1 and the first coating layer 2a, even if the elastomer body 1 and the first coating layer 2a are weakly crosslinked even if co-crosslinked.
  • the second coating layer 2b that strongly co-crosslinks between the elastomer body 1 and the first coating layer 2a, the elastomer body 1 can be firmly coated with the first coating layer 2a.
  • the plurality of coating layers 2a and 2b each having a different function are firmly attached to the elastomer body 1. It can also be used for the purpose of coating.
  • two coating layers are coated on the elastomer body 1.
  • three or more coating layers may be used.
  • the coating layers are co-crosslinked, but depending on the material constituting the coating layer, the coating layers may be firmly bonded to each other even if the coating layers are not co-crosslinked. . In such a case, the coating layers may not be co-crosslinked.
  • This example is an example in which the present invention is applied to the manufacture of packings.
  • the compound to be molded into the elastomer body was prepared by blending a reinforcing material, a crosslinking agent and other additives into SBR.
  • the first coating material was made by blending various additives with high nitrile NBR (acrylonitrile butadiene rubber), and the second coating material was made by blending various additives with low nitrile NBR.
  • PET was used as the film-like body, and toluene mixed with acetone was used as the solvent for dissolving the coating material.
  • the mold is configured so that the elastomer body is formed into a packing shape
  • the first coating layer made of high nitrile NBR and the low nitrile NBR are made.
  • An elastomer body made of SBR coated with the second coating layer is obtained (in this embodiment, the elastomer body coated with the first and second coating layers is a packing).
  • the first coating layer is made of high nitrile NBR, so that excellent oil resistance can be obtained.
  • the high nitrile NBR and the SBR of the elastomer body do not co-crosslink strongly, but the low nitrile NBR strongly co-crosslinks to both the high nitrile NBR and SBR.
  • the coating layer can be firmly coated.
  • This example is an example in which the present invention is applied to the manufacture of belts.
  • the compound to be molded into the elastomer body was obtained by blending EPDM with a reinforcing material, a crosslinking agent and other additives.
  • the first coating material was formulated with various additives in silicone rubber, and the second coating material was formulated with various additives in SE rubber.
  • OPP was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
  • Example 9 By performing the same steps as in Example 9 (however, the mold is configured so that the elastomer body is molded into the shape of belts), the first covering layer made of silicone rubber and the second made of SE rubber. An elastomer body made of EPDM coated with the above coating layer is obtained.
  • the first coating layer is made of silicone rubber, excellent water repellency can be obtained.
  • silicone rubber and EPDM of the elastomer body do not co-crosslink strongly, but SE rubber strongly co-crosslinks both the silicone rubber and EPDM, so the first coating layer is attached to the elastomer body via the second coating layer. Can be coated firmly.
  • This example is an example in which a plurality of coating layers are used, but the coating layers are not co-crosslinked, and the present invention is applied to the production of a rubber sheet for table tennis rackets.
  • the compound to be molded into an elastomer body was a mixture of natural rubber with a reinforcing material, a crosslinking agent and other additives.
  • the first coating material is a thermoplastic elastomer SEPS (styrene / ethylene / propylene / styrene copolymer) blended with various additives
  • the second coating material is a thermoplastic elastomer SIS (styrene / isoprene). ⁇ Styrene copolymer) was blended with various additives.
  • PET was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
  • an elastomer body made of natural rubber coated with the first coating layer made of SEPS and the second coating layer made of SIS is obtained (in the case of this example, The elastomer body coated with the first and second coating layers is a table tennis racket rubber sheet).
  • the elastomer body and the second coating layer are co-crosslinked, but the first coating layer and the second coating layer are not co-crosslinked.
  • the first coating layer made of SEPS and the second coating layer made of SIS are firmly bonded without co-crosslinking, the first coating layer is attached to the elastomer body via the second coating layer. Can be coated firmly.
  • the first coating layer is made of SEPS, excellent weather resistance and adhesiveness can be obtained.
  • SEBS styrene / ethylene / butylene / styrene copolymer
  • SBS styrene / butadiene / styrene copolymer
  • Embodiment 13 of the present invention shows Embodiment 13 of the present invention.
  • the examples so far have been examples in which the coating layer 2 covers the entire surface of the elastomer body 1 (covers in a non-patterned manner)
  • the present example is similar to the printed pattern of the printed circuit board. This is an example of a simple pattern, a pattern, a character, a pattern such as a figure. Therefore, in the present embodiment, a portion covered with the coating layer 2 and a portion not covered are generated on the surface of the elastomer body 1.
  • the compound to be molded into the elastomer body 1 was prepared by blending a reinforcing material, a crosslinking agent and other additives into EPDM.
  • the coating material 2 ' was prepared by blending conductive carbon powder and other additives with EPDM.
  • a coating material 2 'dissolved in a solvent such as toluene and made into a highly viscous liquid is applied to the surface of the film-like body 3 in a pattern by printing.
  • the uncrosslinked compound to be molded into the elastomer body 1 and the coating material 2 ′ applied to the film-like body 3 were brought into contact with each other in the mold.
  • the elastomer body 1 side EPDM and the coating material 2 ′ side EPDM are cross-linked by heating and pressurizing in the state, and at the interface between the elastomer body 1 and the coating layer 2, the EPDM on the elastomer body 1 side and the EPDM on the coating layer 2 side Are co-crosslinked.
  • FIG. 18 shows the completed elastomer body 1 covered with a coating layer 2 having a pattern shape.
  • the conductive coating layer 2 can be formed in a pattern on the surface of the elastomer body 1.
  • the coating material does not contain a crosslinking agent. This is because the coating material is cross-linked by the cross-linking agent blended in the elastomer that will be molded into the elastomer body without blending the cross-linking agent. You may mix
  • the present invention can be widely applied to products other than the products listed in the above embodiments.
  • the method for producing an elastomer body coated with a coating layer according to the present invention is useful as a method for coating a coating layer on the surface of various elastomer bodies made of an elastomer such as rubber or thermoplastic elastomer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

This method of producing an elastomer body covered with a covering layer makes it possible to firmly cover the surface of an elastomer body (1) with a covering layer (2) of elastomers of a different composition and to achieve a uniform thickness of the covering layer (2). A covering material (2') containing elastomers is dissolved in a solvent and coated onto a film-like body (3) as a liquid or paste. In a mold (4, 5), uncrosslinked elastomers (1') that will form the elastomer body (1), and the covering material (2') coated onto the film-like body (3) are heated and pressurized in a state of mutual contact, and the elastomers on the side of the elastomer body (1) and the elastomers contained in the covering material are crosslinked. By this means, an elastomer body (1) is formed, the covering material (2') forms a covering layer (2), and at the interface between the elastomer body (1) and the covering layer (2), the elastomers on the elastomer body (1) side and the elastomers on the covering layer (2) side are co-crosslinked.

Description

被覆層で被覆されたエラストマー体の製造方法Method for producing elastomer body coated with coating layer
　本発明は、ゴムや熱可塑性エラストマー等のエラストマーを主成分とするエラストマー体を組成が異なる被覆層で被覆してなる、被覆層で被覆されたエラストマー体の製造方法に関する。
＜参照による引用＞
　本出願は、２０１３年１２月２８日付けで出願した日本国特願２０１３－２７３６４１号に基づく優先権の主張を伴うものであって、その内容を援用するものである。 The present invention relates to a method for producing an elastomer body coated with a coating layer, which is obtained by coating an elastomer body mainly composed of an elastomer such as rubber or thermoplastic elastomer with coating layers having different compositions.
<Quotation by reference>
This application is accompanied by a priority claim based on Japanese Patent Application No. 2013-273641 filed on Dec. 28, 2013, the contents of which are incorporated herein by reference.
　各種エラストマーはそれぞれが持つ優れた特長に応じて種々の用途に使用されているが、ほとんど例外なく、そのエラストマー単体では短所をも有している。 ¡Various elastomers are used for various applications according to their superior features, but there are almost no exceptions, and the elastomer itself has its disadvantages.
　例えば、卓球ラケット用ラバーシートとしては、高い反発弾性等が必要とされるため、通常、天然ゴム（ＮＲ）やイソプレンゴム（ＩＲ）をベースゴムとして成形架橋されたものが用いられており、ブタジエンゴム（ＢＲ）を少量混ぜる場合もある。 For example, as a rubber sheet for table tennis rackets, high impact resilience is required, and therefore, a natural rubber (NR) or isoprene rubber (IR) molded and cross-linked with a base rubber is usually used. A small amount of rubber (BR) may be mixed.
　しかし、天然ゴム、イソプレンゴムおよびブタジエンゴムは、分子構造内に不飽和結合を沢山有しているため、耐オゾン、耐候性が悪い。このため、従来の卓球ラケット用ラバーシートは、比較的短期間のうちに表面が劣化し、摩擦係数が低下して、ボールに回転をかけにくくなるとともに外観が悪くなるという問題を有していた。 However, natural rubber, isoprene rubber, and butadiene rubber have many unsaturated bonds in their molecular structures, and thus have poor ozone resistance and weather resistance. For this reason, the conventional rubber sheet for table tennis rackets has a problem that the surface deteriorates in a relatively short period of time, the coefficient of friction decreases, and it becomes difficult to rotate the ball and the appearance deteriorates. .
　同様にして、他の用途の各種エラストマー体も、該エラストマー体を構成するエラストマーが有する短所に由来する問題点を有していた。 Similarly, various elastomer bodies for other uses also have problems derived from the disadvantages of the elastomer constituting the elastomer body.
　このため、従来より、エラストマー体の表面を、該エラストマー体を構成するエラストマーが持つ短所を有さない組成が異なるエラストマーで被覆することにより、上記問題を解決しようとする試みが種々なされている。 For this reason, various attempts have been made to solve the above problems by coating the surface of the elastomer body with an elastomer having a different composition that does not have the disadvantages of the elastomer constituting the elastomer body.
　その一つの方法は、例えば、特許文献１に開示されているように、架橋（加硫）済みのエラストマー体の表面を組成が異なるエラストマーで被覆する方法である。 One method is, for example, a method of coating the surface of a crosslinked (vulcanized) elastomer body with an elastomer having a different composition, as disclosed in Patent Document 1.
　もう一つの方法は、エラストマー体に成形されることとなる未架橋のエラストマーの表面に、被覆層となるべき組成が異なる未架橋のエラストマーをシート状に積層した上、両者を熱プレスして架橋し、エラストマー体の架橋・成形と被覆層の架橋・形成とを同時に行う方法である。 Another method is to laminate an uncrosslinked elastomer with a different composition to be a coating layer on the surface of the uncrosslinked elastomer to be formed into an elastomer body, and then heat-press both to crosslink. In this method, crosslinking / molding of the elastomer body and crosslinking / formation of the coating layer are simultaneously performed.
日本特許第３１９８４２２号公報Japanese Patent No. 3198422
　しかしながら、前記従来の架橋済みのエラストマー体の表面を組成の異なるエラストマーで被覆する方法においては、エラストマー体と被覆層との界面において両者を互いに十分に架橋させることが困難であるので、被覆層をエラストマー体に強固に結合させることができないという問題があった。 However, in the conventional method of coating the surface of the crosslinked elastomer body with an elastomer having a different composition, it is difficult to sufficiently cross-link the two at the interface between the elastomer body and the coating layer. There was a problem that it could not be firmly bonded to the elastomer body.
　また、前記従来のエラストマー体に成形されることとなる未架橋のエラストマーの表面に、被覆層となるべき組成が異なる未架橋のエラストマーをシート状に積層した上、両者を熱プレスして架橋する方法においては、被覆層となるべきシート状のエラストマーの厚さを薄くすると、熱プレスによってエラストマー体に成形されることとなる未架橋エラストマーが面方向に流動して行く際、被覆層となるべきシート状のエラストマーが切れてしまっていた。また、その一方、被覆層となるべきエラストマーの厚さを厚くすると、熱プレスによってエラストマー体に成形されることとなる未架橋エラストマーが面方向に流動して行く際、被覆層となるべきエラストマーの方もその応力によって押し流されてしまうので、結果的に得られる被膜層は厚みにムラが生じてしまい、品質面で不十分なものとなってしまうという問題があった。 Further, an uncrosslinked elastomer having a different composition to be a coating layer is laminated in a sheet shape on the surface of the uncrosslinked elastomer to be formed into the conventional elastomer body, and both are hot-pressed to be crosslinked. In the method, when the thickness of the sheet-like elastomer to be the coating layer is reduced, the uncrosslinked elastomer that is to be formed into an elastomer body by hot pressing flows in the surface direction and should become the coating layer. The sheet-like elastomer was cut. On the other hand, when the thickness of the elastomer to be the coating layer is increased, when the uncrosslinked elastomer that is to be formed into the elastomer body by hot pressing flows in the surface direction, the elastomer to be the coating layer As a result, the film layer is washed away by the stress, resulting in a problem that the resulting coating layer is uneven in thickness and insufficient in quality.
　本発明は、このような従来の事情に鑑みてなされたもので、本発明の目的の一つは、エラストマー体の表面に組成が異なるエラストマーの被覆層を強固に結合することができる被覆層で被覆されたエラストマー体の製造方法を提供することにある。 The present invention has been made in view of such conventional circumstances, and one of the objects of the present invention is a coating layer that can firmly bond an elastomer coating layer having a different composition to the surface of the elastomer body. The object is to provide a method for producing a coated elastomer body.
　本発明の他の目的は、エラストマー体の表面に組成が異なるエラストマーの被覆層を均一な厚さで形成することができる被覆層で被覆されたエラストマー体の製造方法を提供することにある。 Another object of the present invention is to provide a method for producing an elastomer body coated with a coating layer, which can form an elastomer coating layer having a different composition on the surface of the elastomer body with a uniform thickness.
　本発明のさらに他の目的は、以下の説明から明らかになろう。 Further objects of the present invention will become clear from the following description.
　本発明による被覆層で被覆されたエラストマー体の製造方法は、
　エラストマーを主成分とするエラストマー体の表面を組成が異なる被覆層で被覆してなる、被覆層で被覆されたエラストマー体の製造方法であって、
　前記被覆層を構成させるべき被覆材料として、前記エラストマー体に成形されることとなる未架橋のエラストマーに接触した状態で加熱および加圧されると、前記エラストマー体との界面において前記エラストマー体側エラストマーと共架橋することとなるエラストマーを含む材料を用意する段階と、
　前記被覆材料を溶媒に溶かして液状またはペースト状とする段階と、
　前記液状またはペースト状とされた被覆材料を、前記エラストマー体に成形されることとなるエラストマーおよび前記被覆材料に含まれるエラストマーの架橋温度より高い融点を有する材料からなる膜状体上に塗布する段階と、
　金型内において、前記エラストマー体に成形されることとなる未架橋のエラストマーと前記膜状体に塗布された前記被覆材料とを互いに接触させた状態で加熱および加圧し、前記エラストマー体側エラストマーおよび前記被覆材料に含まれるエラストマーを架橋することにより、前記エラストマー体を成形するとともに前記被覆材料に前記エラストマー体の表面を被覆する前記被覆層を形成させ、かつ前記エラストマー体と前記被覆層との界面においては前記エラストマー体側エラストマーと前記被覆材料に含まれるエラストマーとを共架橋させる段階とを有してなるものである。 The method for producing an elastomer body coated with a coating layer according to the present invention comprises:
A method for producing an elastomer body coated with a coating layer, wherein the surface of an elastomer body mainly composed of an elastomer is coated with a coating layer having a different composition,
As a coating material for forming the coating layer, when heated and pressurized in contact with an uncrosslinked elastomer to be molded into the elastomer body, the elastomer body side elastomer at the interface with the elastomer body Providing a material comprising an elastomer that will be co-crosslinked;
Dissolving the coating material in a solvent to form a liquid or paste;
Applying the liquid or paste-like coating material onto a film-like body made of an elastomer to be molded into the elastomer body and a material having a melting point higher than the crosslinking temperature of the elastomer contained in the coating material When,
In the mold, the uncrosslinked elastomer to be molded into the elastomer body and the coating material applied to the film-like body are heated and pressed in contact with each other, the elastomer body side elastomer and the The elastomer contained in the coating material is crosslinked to form the elastomer body and form the coating layer on the surface of the elastomer body on the coating material, and at the interface between the elastomer body and the coating layer. Comprises a step of co-crosslinking the elastomer body side elastomer and the elastomer contained in the coating material.
　本発明においては、エラストマー体に成形されることとなるエラストマーと被覆材料とをともに未架橋の状態で互いに接触させた状態で加熱および加圧して架橋し、エラストマー体と被覆層との界面においてはエラストマー体側エラストマーと被覆層に含まれるエラストマーとが共架橋するようにするので、被覆層をエラストマー体に強固に結合させることができる。 In the present invention, the elastomer to be molded into the elastomer body and the coating material are both crosslinked in an uncrosslinked state by heating and pressurizing, and at the interface between the elastomer body and the coating layer, Since the elastomer body side elastomer and the elastomer contained in the coating layer are co-crosslinked, the coating layer can be firmly bonded to the elastomer body.
　また、被覆材料は膜状体に塗布されているので、加熱・加圧時、エラストマー体に成形されることとなる未架橋のエラストマーが面方向に流動して行っても、膜状体が被覆材料に対し流動抵抗を作用させるので、被覆材料は一緒に流動してしまわないため、被覆材料の層の厚さを薄くしても切れてしまうことがないし、ある程度厚くしても厚さが均一な被覆層が形成される。 In addition, since the coating material is applied to the film-like body, the film-like body is covered even when uncrosslinked elastomer that will be molded into the elastomer body flows in the surface direction during heating and pressurization. Since the flow resistance acts on the material, the coating material does not flow together. Therefore, even if the thickness of the coating material layer is reduced, it does not break. A simple coating layer is formed.
　ただし、被覆材料の層を過度に厚くすると、膜状体と反対側の被覆材料の表面側に膜状体による流動抵抗が及ばなくなってくるので、本発明における被覆層の厚さは、好ましくは５００マイクロメートル（μｍ）以下、さらに好ましくは１００マイクロメートル以下、さらに一層好ましくは５０マイクロメートル以下とするとよい。 However, if the coating material layer is excessively thick, the flow resistance due to the membrane does not reach the surface of the coating material opposite to the membrane, so the thickness of the coating layer in the present invention is preferably It may be 500 micrometers (μm) or less, more preferably 100 micrometers or less, and even more preferably 50 micrometers or less.
　なお、膜状体として、エラストマー体に成形されることとなるエラストマーおよび被覆材料に含まれるエラストマーの架橋温度より高い融点を有する材料を使用するので、エラストマーの架橋時に膜状体が溶融してしまうことはない。 In addition, since a material having a melting point higher than the crosslinking temperature of the elastomer contained in the elastomer and the coating material is used as the film-like body, the film-like body is melted when the elastomer is crosslinked. There is nothing.
　本発明の被覆層で被覆されたエラストマー体の製造方法は、
　（イ）エラストマー体の表面に組成が異なるエラストマーの被覆層を強固に結合することができる、
　（ロ）エラストマー体の表面に組成が異なるエラストマーの被覆層を均一な厚さで形成することができる、
等の優れた効果を得られるものである。 The method for producing an elastomer body coated with the coating layer of the present invention comprises:
(A) The elastomer coating layer having a different composition can be firmly bonded to the surface of the elastomer body.
(B) The elastomer coating layer having a different composition can be formed on the surface of the elastomer body with a uniform thickness.
It is possible to obtain excellent effects such as.
本発明の実施例１において、膜状体に被覆材料を塗布した状態を示す断面図である。In Example 1 of this invention, it is sectional drawing which shows the state which apply | coated the coating material to the film-form body. 前記実施例１において、被覆材料を塗布された膜状体とエラストマー体に成形されることとなる未架橋のエラストマーとを互いに重ねて金型内に収容した状態を示す断面図である。In the said Example 1, it is sectional drawing which shows the state which piled up the film-form body which apply | coated the coating material, and the non-bridge | crosslinking elastomer which will be shape | molded by the elastomer body mutually in a metal mold | die. 前記実施例１において、エラストマー体に成形されることとなるエラストマーと被覆材料とを加熱および加圧して架橋し、エラストマー体の成形および被覆層の形成を行っている状態を示す断面図である。In the said Example 1, the elastomer and coating material which are shape | molded by the elastomer body are bridge | crosslinked by heating and pressurizing, It is sectional drawing which shows the state which is forming the elastomer body and forming the coating layer. 前記実施例１において、架橋成形されたエラストマー体の表面に形成された被覆層から膜状体を剥離する様子を示す断面図である。In the said Example 1, it is sectional drawing which shows a mode that a film-like body is peeled from the coating layer formed in the surface of the elastomer body by which the crosslinking shaping | molding was carried out. 前記実施例１において、膜状体を剥離されて完成した、被覆層で被覆されたエラストマー体を示す断面図である。In the said Example 1, it is sectional drawing which shows the elastomer body coat | covered with the coating layer which peeled and completed the film-like body. 本発明の実施例６において被覆材料を印刷（塗布）された膜状体を示す平面図である。It is a top view which shows the film-like body by which the coating material was printed (application | coating) in Example 6 of this invention. 図６のＶＩＩ－ＶＩＩ線における断面図である。FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. 前記実施例６において、膜状体を剥離されて完成した、被覆層で被覆されたエラストマー体を示す平面図である。In the said Example 6, it is a top view which shows the elastomer body coat | covered with the coating layer completed by peeling a film-like body. 本発明の実施例７において表面を粗面化された膜状体を示す平面図である。It is a top view which shows the film-like body by which the surface was roughened in Example 7 of this invention. 本発明の実施例８において、エラストマー体に成形されることとなるエラストマーと被覆材料とを加熱および加圧して架橋し、エラストマー体の成形および被覆層の形成を行っている状態を示す断面図である。In Example 8 of this invention, it is sectional drawing which shows the state which is performing the shaping | molding of an elastomer body, and formation of a coating layer by heating and pressurizing and cross-linking the elastomer and coating material which are shape | molded by an elastomer body. is there. 前記実施例８において、完成した、被覆層で被覆されたエラストマー体を示す断面図である。In the said Example 8, it is sectional drawing which shows the elastomer body coat | covered with the coating layer completed. 本発明の実施例９において、膜状体に被覆材料を２層に塗布した状態を示す断面図である。In Example 9 of this invention, it is sectional drawing which shows the state which apply | coated the coating material to the film-form body in two layers. 前記実施例９において、被覆材料を２層に塗布された膜状体とエラストマー体に成形されることとなる未架橋のエラストマーとを互いに重ねて金型内に収容した状態を示す断面図である。In the said Example 9, it is sectional drawing which shows the state which accumulated the film-form body by which the coating material was apply | coated to two layers, and the unbridged elastomer which will be shape | molded by the elastomer body mutually piled up, and was accommodated in the metal mold | die. . 前記実施例９において、エラストマー体に成形されることとなるエラストマーと被覆材料とを加熱および加圧して架橋し、エラストマー体の成形および被覆層の形成を行っている状態を示す断面図である。In the said Example 9, it is sectional drawing which shows the state which is carrying out the shaping | molding of an elastomer body, and formation of a coating layer by heating and pressurizing and cross-linking the elastomer and coating material which are shape | molded to an elastomer body. 前記実施例９において、架橋成形されたエラストマー体の表面に形成された被覆層から膜状体を剥離する様子を示す断面図である。In the said Example 9, it is sectional drawing which shows a mode that a film-like body is peeled from the coating layer formed in the surface of the elastomer body by which crosslinking molding was carried out. 前記実施例９において、膜状体を剥離されて完成した、被覆層で被覆されたエラストマー体を示す断面図である。In the said Example 9, it is sectional drawing which shows the elastomer body coat | covered with the coating layer completed by peeling a film-like body. 本発明の実施例１３において、パターン状をなすように被覆材料を膜状体に塗布した状態を示す平面図である。In Example 13 of this invention, it is a top view which shows the state which apply | coated the coating material to the film-form body so that pattern shape might be made. 前記実施例１３において、完成した、パターン状の被覆層で被覆されたエラストマー体を示す断面図である。In the said Example 13, it is sectional drawing which shows the elastomer body coat | covered with the pattern-shaped coating layer completed.
　本発明におけるエラストマー体を構成するエラストマーとしては、基本的にはゴムや熱可塑性エラストマー等のあらゆる種類のエラストマーを使用できる。 As the elastomer constituting the elastomer body in the present invention, basically any type of elastomer such as rubber or thermoplastic elastomer can be used.
　被覆材料は、エラストマー体との界面においてエラストマー体側エラストマーと共架橋するエラストマーを含有する必要がある。また、被覆層に粘着性、導電性、親水性、耐候性、耐油性、潤滑性、撥水性、ガスバリア性、高摩擦、低摩擦性等の所望の機能を持たせるために、必要であれば、エラストマー以外の機能付与材料を含有させる（勿論、エラストマー自体が必要な機能を備えている場合は、機能付与材料を添加する必要はない）。 The coating material needs to contain an elastomer that co-crosslinks with the elastomer-side elastomer at the interface with the elastomer body. In addition, if necessary, in order to give the coating layer desired functions such as adhesiveness, conductivity, hydrophilicity, weather resistance, oil resistance, lubricity, water repellency, gas barrier properties, high friction, low friction, etc. , A function-imparting material other than an elastomer is contained (of course, when the elastomer itself has a necessary function, it is not necessary to add a function-imparting material).
　膜状体としては、例えばＰＥＴ（ポリエチレンテレフタラート）、ＯＰＰ（延伸ポリプロピレン）、ナイロン、ＰＶＡ（ポリビニルアルコール）等の樹脂シートないしはフィルムや金属泊等を使用できる。 As the film-like body, for example, a resin sheet such as PET (polyethylene terephthalate), OPP (stretched polypropylene), nylon, PVA (polyvinyl alcohol), a film, a metal stay, or the like can be used.
　被覆材料を溶かす溶媒としては、例えばトルエン、シクロヘキサン、またはこれらにアセトンを混合したもの等、適宜なものを使用できる。 As a solvent for dissolving the coating material, for example, toluene, cyclohexane, or a mixture of these with acetone can be used.
　液状またはペースト状とされた被覆材料を膜状体に塗布する作業は、例えばコーター、スプレー、印刷等の適宜な手段で行うことができる。 The operation of applying the coating material in a liquid or paste form to the film-like body can be performed by an appropriate means such as a coater, spray, or printing.
　以下、本発明を図面に示す実施例に基づいて説明する。 Hereinafter, the present invention will be described based on embodiments shown in the drawings.
　図１～５は本発明の実施例１を示している。本実施例は卓球ラケット用ラバーシートの製造に本発明を適用した例である。本実施例においては、エラストマー体１に成形されるコンパウンド１’は、天然ゴム（ＮＲ）に補強材、架橋剤およびその他の添加物を配合したものとした。被覆材料２’は、ＥＰＤＭ（エチレン－プロピレン－ジエンゴム）に補強材およびその他の添加物を配合したものとした。膜状体３としてはＰＥＴ、被覆材料２’を溶かす溶媒としてはトルエンをそれぞれ使用した。 1 to 5 show Embodiment 1 of the present invention. In this example, the present invention is applied to the production of a rubber sheet for table tennis rackets. In this example, the compound 1 ′ molded into the elastomer body 1 was obtained by blending a reinforcing material, a crosslinking agent and other additives with natural rubber (NR). The coating material 2 'was prepared by blending a reinforcing material and other additives with EPDM (ethylene-propylene-diene rubber). PET was used as the film-like body 3, and toluene was used as the solvent for dissolving the coating material 2 '.
　まず、被覆材料２’を溶媒に溶かし高粘性液体とした。次いで、図１のように、前記液状とされた被覆材料２’を膜状体３にコーター等により薄く塗布し、乾燥後、図２のように下金型４内に収容し、その上にエラストマー体１に成形されることとなる未架橋のコンパウンド１’を置く。 First, the coating material 2 'was dissolved in a solvent to obtain a highly viscous liquid. Next, as shown in FIG. 1, the liquid coating material 2 ′ is thinly applied to the film-like body 3 with a coater or the like, dried, and then accommodated in the lower mold 4 as shown in FIG. An uncrosslinked compound 1 ′ to be molded into the elastomer body 1 is placed.
　次に、図３のように上金型５を閉め、コンパウンド１’と膜状体３に塗布された被覆材料２’とを互いに接触させた状態で加熱および加圧する。すると、コンパウンド１’の天然ゴムが架橋されてシート状のエラストマー体１に成形されるとともに被覆材料２’のＥＰＤＭが架橋されて被覆層２となり、エラストマー体１と被覆層２との界面においてはエラストマー体１の天然ゴムと被覆層２のＥＰＤＭとが共架橋する。 Next, as shown in FIG. 3, the upper mold 5 is closed, and the compound 1 'and the coating material 2' applied to the film-like body 3 are heated and pressurized while being in contact with each other. Then, the natural rubber of the compound 1 ′ is cross-linked to be molded into a sheet-like elastomer body 1 and the EPDM of the coating material 2 ′ is cross-linked to form the coating layer 2, and at the interface between the elastomer body 1 and the coating layer 2 The natural rubber of the elastomer body 1 and the EPDM of the coating layer 2 are co-crosslinked.
　次に、金型４，５から被覆層２で被覆されたエラストマー体１を膜状体３とともに取り出し、図４のように膜状体３を被覆層２から剥離する。この剥離は極めて容易に行うことができる。図５は、膜状体３を剥離された後の、被覆層２で被覆されたエラストマー体１を示しているか（本実施例の場合、この被覆層２で被覆されたエラストマー体１が卓球ラケット用ラバーシートとなる）。 Next, the elastomer body 1 covered with the coating layer 2 is taken out from the molds 4 and 5 together with the film-like body 3, and the film-like body 3 is peeled off from the coating layer 2 as shown in FIG. This peeling can be performed very easily. FIG. 5 shows the elastomer body 1 covered with the coating layer 2 after the film-like body 3 is peeled off (in this embodiment, the elastomer body 1 covered with the coating layer 2 is a table tennis racket). For rubber sheet).
　この被覆層２で被覆されたエラストマー体１の製造方法においては、コンパウンド１’と被覆材料２’とを共に未架橋の状態で互いに接触させた状態で加熱および加圧して架橋し、エラストマー体１と被覆層２との界面においてはエラストマー体１側の天然ゴムと被覆層２側のＥＰＤＭとが共架橋するようにするので、被覆層２をエラストマー体１に強固に結合させることができる。 In the method for producing the elastomer body 1 coated with the coating layer 2, the compound body 1 ′ and the coating material 2 ′ are both cross-linked by heating and pressurizing in an uncrosslinked state, and the elastomer body 1. Since the natural rubber on the elastomer body 1 side and the EPDM on the coating layer 2 side are co-crosslinked at the interface between the coating layer 2 and the coating layer 2, the coating layer 2 can be firmly bonded to the elastomer body 1.
　また、被覆材料２’は膜状体３に塗布されているので、加熱・加圧時、コンパウンド１’の未加硫天然ゴムが面方向に流動して行っても、膜状体３が被覆材料２’に対し流動抵抗を作用させるので、被覆材料２’は一緒に流動してしまわないため、被覆材料２’の層の厚さを薄くしても切れてしまうことがないし、ある程度厚くしても厚さが均一な被覆層２が形成される。 Further, since the coating material 2 ′ is applied to the film-like body 3, the film-like body 3 is covered even when the unvulcanized natural rubber of the compound 1 ′ flows in the surface direction during heating and pressurization. Since the flow resistance acts on the material 2 ′, the coating material 2 ′ does not flow together. Therefore, even if the layer of the coating material 2 ′ is thinned, it does not break, and is made thick to some extent. However, the coating layer 2 having a uniform thickness is formed.
　そして、本実施例の場合、エラストマー体１は主として天然ゴムからなるので、卓球ラケット用ラバーシートに必要な高い反発弾性を満足することができる。その上、ＥＰＤＭで構成される被覆層２がエラストマー体１を覆っているので、耐オゾン、耐候性が悪いというエラストマー体１の天然ゴムの欠点を解消できる。 And in the case of the present Example, since the elastomer body 1 mainly consists of natural rubber, it can satisfy the high rebound resilience required for the table tennis racket rubber sheet. In addition, since the coating layer 2 made of EPDM covers the elastomer body 1, the disadvantage of the natural rubber of the elastomer body 1 that ozone resistance and weather resistance are poor can be solved.
　なお、天然ゴムの代わりにイソプレンゴムを用いてもよい。 Note that isoprene rubber may be used instead of natural rubber.
　本実施例も卓球ラケット用ラバーシートの製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、天然ゴムに充填材、架橋剤およびその他の添加物を配合したものとした。被覆材料は、ＩＩＲ（ブチルゴム）にポリブテンおよびその他の添加物を配合したものとした。膜状体としてはナイロン１２、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 This example is also an example in which the present invention is applied to the production of a rubber sheet for table tennis rackets. In this example, the compound to be molded into the elastomer body was prepared by blending a natural rubber with a filler, a crosslinking agent, and other additives. The coating material was IIR (butyl rubber) blended with polybutene and other additives. Nylon 12 was used as the membrane, and toluene was used as the solvent for dissolving the coating material.
　実施例１と全く同様の工程を行うことにより、ポリブテンを含むＩＩＲの被覆層で被覆された天然ゴムを主成分とするエラストマー体が得られる（本実施例の場合、この被覆層で被覆されたエラストマー体が卓球ラケット用ラバーシートとなる）。 By carrying out the same steps as in Example 1, an elastomer body mainly composed of natural rubber coated with an IIR coating layer containing polybutene can be obtained (in this example, the coating was coated with this coating layer). The elastomer body becomes a rubber sheet for table tennis rackets).
　本実施例においても、エラストマー体と被覆層との界面において、エラストマー体側の天然ゴムと被覆層側のＩＩＲとが共架橋するので、被覆層をエラストマー体に強固に結合させることができる。また、加熱・加圧時の膜状体の存在により厚さが均一な被覆層を得ることができる。 Also in this example, since the natural rubber on the elastomer body side and the IIR on the coating layer side are co-crosslinked at the interface between the elastomer body and the coating layer, the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
　そして、本実施例の場合も、エラストマー体は主として天然ゴムからなるので、卓球ラケット用ラバーシートに要求される高い反発弾性を満足することができる上、ポリブテンを含むＩＩＲの被覆層がエラストマー体を覆っているので、耐候性を改善するとともに表面に粘着性を付与し、ボールに回転を掛けやすくすることができる。 Also in the case of this example, since the elastomer body is mainly made of natural rubber, it can satisfy the high resilience required for a rubber sheet for table tennis rackets, and the IIR coating layer containing polybutene is made of an elastomer body. Since it covers, the weather resistance can be improved and the surface can be made sticky to make it easier to rotate the ball.
　なお、天然ゴムの代わりにイソプレンゴムを用いてもよい。 Note that isoprene rubber may be used instead of natural rubber.
　本実施例はワイパーブレードの製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、天然ゴムに充填材、架橋剤およびその他の添加物を配合したものとした。被覆材料は、天然ゴムにＰＴＦＥ（ポリテトラフルオロエチレン）粉末、グラファイトおよびその他の添加物を配合したものとした。膜状体としてはＰＥＴ、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 This example is an example in which the present invention is applied to manufacture of a wiper blade. In this example, the compound to be molded into the elastomer body was prepared by blending a natural rubber with a filler, a crosslinking agent, and other additives. The coating material was obtained by blending PTFE (polytetrafluoroethylene) powder, graphite and other additives into natural rubber. PET was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
　実施例１と同様の工程を行うことにより（ただし、金型はエラストマー体がワイパーブレードの形状に成形されるように構成する）、ＰＴＦＥおよびグラファイトを含む天然ゴムの被覆層で被覆された、天然ゴムを主成分とするエラストマー体が得られる（本実施例の場合、この被覆層で被覆されたエラストマー体がワイパーブレードとなる）。 By performing the same steps as in Example 1 (however, the mold is configured so that the elastomer body is formed into the shape of a wiper blade), natural coating coated with a natural rubber coating layer containing PTFE and graphite is used. An elastomer body mainly composed of rubber is obtained (in the case of this example, the elastomer body covered with this coating layer becomes a wiper blade).
　本実施例においても、エラストマー体と被覆層との界面において、エラストマー体側の天然ゴムと被覆層側の天然ゴムとが共架橋するので、被覆層をエラストマー体に強固に結合させることができる。また、加熱・加圧時の膜状体の存在により厚さが均一な被覆層を得ることができる。 Also in this example, since the natural rubber on the elastomer body side and the natural rubber on the coating layer side are co-crosslinked at the interface between the elastomer body and the coating layer, the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
　また、ＰＴＦＥおよびグラファイトを含む被覆層がエラストマー体を覆っているので、潤滑性を向上することができる。 Also, since the coating layer containing PTFE and graphite covers the elastomer body, the lubricity can be improved.
　本実施例は導電エラストマーの製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、ＥＰＤＭ（エチレン－プロピレン－ジエンゴム）に補強材、架橋剤およびその他の添加物を配合したものとした。被覆材料は、ＥＰＤＭに導電性カーボン粉末およびその他の添加物を配合したものとした。膜状体としてはＯＰＰ、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 This example is an example in which the present invention is applied to the production of a conductive elastomer. In this example, the compound to be molded into the elastomer body was prepared by blending a reinforcing material, a crosslinking agent and other additives with EPDM (ethylene-propylene-diene rubber). The coating material was prepared by blending EPDM with conductive carbon powder and other additives. OPP was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
　実施例１と同様の工程を行うことにより、導電性カーボンを分散されたＥＰＤＭの被覆層で被覆された、ＥＰＤＭからなるエラストマー体が得られる（本実施例の場合、この被覆層で被覆されたエラストマー体が導電エラストマーとなる）。 By performing the same process as in Example 1, an elastomer body made of EPDM coated with a coating layer of EPDM dispersed with conductive carbon is obtained (in this example, the coating was coated with this coating layer). The elastomer body becomes a conductive elastomer).
　なお、本実施例のように膜状体としてＯＰＰは使用する場合は、ＯＰＰはＰＥＴ等に比し融点が低いので、エラストマー体の架橋温度も低めになるようにする必要がある。 In addition, when OPP is used as a film-like body as in this embodiment, since the melting point of OPP is lower than that of PET or the like, it is necessary to lower the crosslinking temperature of the elastomer body.
　本実施例においても、エラストマー体と被覆層との界面において、エラストマー体側のＥＰＤＭと被覆層側のＥＰＤＭとが共架橋するので、被覆層をエラストマー体に強固に結合させることができる。また、加熱・加圧時の膜状体の存在により厚さが均一な被覆層を得ることができる。 Also in this embodiment, since the EPDM on the elastomer body side and the EPDM on the coating layer side co-crosslink at the interface between the elastomer body and the coating layer, the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
　また、導電性カーボンを含む被覆層がエラストマー体を覆っているので、導電性が得られる。 Also, since the coating layer containing conductive carbon covers the elastomer body, conductivity can be obtained.
　本実施例は電解コンデンサの封口ゴムの製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、ＥＰＤＭに補強材、架橋剤およびその他の添加物を配合したものとした。被覆材料は、ブチルゴムにマイカおよびその他の添加物を配合したものとした。膜状体としてはナイロン１２、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 This example is an example in which the present invention is applied to the production of a sealing rubber for an electrolytic capacitor. In this example, the compound to be molded into the elastomer body was obtained by blending EPDM with a reinforcing material, a crosslinking agent and other additives. The coating material was a mixture of butyl rubber and mica and other additives. Nylon 12 was used as the membrane, and toluene was used as the solvent for dissolving the coating material.
　実施例１と同様の工程を行うことにより（ただし、金型はエラストマー体が電解コンデンサの封口ゴムの形状に成形されるように構成する）、マイカを含むブチルゴムの被覆層で被覆された、ＥＰＤＭからなるエラストマー体が得られる（本実施例の場合、この被覆層で被覆されたエラストマー体が封口ゴムとなる）。 EPDM coated with a coating layer of butyl rubber containing mica by performing the same process as in Example 1 (where the mold is configured so that the elastomer body is molded into the shape of a sealing rubber of an electrolytic capacitor) (In the case of this example, the elastomer body covered with this coating layer becomes the sealing rubber).
　本実施例においても、エラストマー体と被覆層との界面において、エラストマー体側のＥＰＤＭと被覆層側のブチルゴムとが共架橋するので、被覆層をエラストマー体に強固に結合させることができる。また、加熱・加圧時の膜状体の存在により厚さが均一な被覆層を得ることができる。 Also in this example, since the EPDM on the elastomer body side and the butyl rubber on the coating layer side co-crosslink at the interface between the elastomer body and the coating layer, the coating layer can be firmly bonded to the elastomer body. Further, a coating layer having a uniform thickness can be obtained due to the presence of the film-like body during heating and pressurization.
　また、マイカを含むブチルゴムの被覆層がエラストマー体を覆っているので、ガスバリア性を向上することができる。 Moreover, since the coating layer of butyl rubber containing mica covers the elastomer body, the gas barrier property can be improved.
　図６～８は本発明の実施例６を示している。本実施例は絵、写真、文字等を表示する被覆層２でエラストマー体１を被覆する例である。本実施例においては、エラストマー体１に成形されることとなるコンパウンドは、ＳＢＲ（スチレン・ブタジエンゴム）にシリカ、架橋剤およびその他の添加物を配合したものとした。被覆材料２’は、ＳＢＲに種々の色が得られるように酸化チタン（白色顔料）や種々の色の各種顔料をそれぞれ配合したものとし、これらを謂わば種々の色のインクとして使用して、図６および７に示されるように膜状体３に絵、写真、文字等を印刷する。膜状体３としてはＰＥＴ、被覆材料２’を溶かす溶媒としてはトルエンをそれぞれ使用した。 6 to 8 show Embodiment 6 of the present invention. In this embodiment, the elastomer body 1 is covered with a covering layer 2 for displaying pictures, photographs, characters and the like. In this example, the compound to be molded into the elastomer body 1 was prepared by blending silica, a crosslinking agent and other additives into SBR (styrene butadiene rubber). The coating material 2 ′ is a blend of titanium oxide (white pigment) and various pigments of various colors so that various colors can be obtained in SBR, and these are used as inks of various colors. As shown in FIGS. 6 and 7, pictures, photographs, characters, etc. are printed on the film-like body 3. PET was used as the film-like body 3, and toluene was used as the solvent for dissolving the coating material 2 '.
　以後は実施例１と同様の工程を行うことにより、図８のように絵、写真、文字等を表示している被覆層２でエラストマー体１を被覆することができる。 Thereafter, by performing the same process as in Example 1, the elastomer body 1 can be coated with the coating layer 2 displaying pictures, photographs, characters, and the like as shown in FIG.
　本実施例においても、エラストマー体１と被覆層２との界面において、エラストマー体１側のＳＢＲと被覆層２側のＳＢＲとが共架橋するので、被覆層２をエラストマー体１に強固に結合させることができる。また、加熱・加圧時の膜状体３の存在により厚さが均一な被覆層２を得ることができる。 Also in the present embodiment, since the SBR on the elastomer body 1 side and the SBR on the coating layer 2 side are co-crosslinked at the interface between the elastomer body 1 and the coating layer 2, the coating layer 2 is firmly bonded to the elastomer body 1. be able to. Further, the coating layer 2 having a uniform thickness can be obtained due to the presence of the film-like body 3 at the time of heating and pressing.
　図９は本発明の実施例７を示している。本実施例においては、図９のように膜状体３の表面をシボ加工等により粗面化しておく。この粗面化された膜状体３の表面に被覆材料を塗布し、以後は実施例１と同様の工程を行うことにより、表面が粗面化された被膜層で被覆されたエラストマー体を得ることができる。 FIG. 9 shows Embodiment 7 of the present invention. In this embodiment, as shown in FIG. 9, the surface of the film-like body 3 is roughened by embossing or the like. A coating material is applied to the surface of the roughened film-like body 3, and thereafter the same process as in Example 1 is performed to obtain an elastomer body whose surface is coated with a roughened coating layer. be able to.
　図１０および１１は本発明の実施例８を示している。本実施例においては、下金型４の底面は平面状でなく、横断面波形状とされている。 10 and 11 show Embodiment 8 of the present invention. In the present embodiment, the bottom surface of the lower mold 4 is not flat but has a cross-sectional wave shape.
　本実施例においても、被覆材料２’を膜状体３に塗布する作業、並びにエラストマー体１および被覆材料２’を架橋する作業は実施例１と同様にして行う。 Also in this embodiment, the operation of applying the coating material 2 ′ to the film-like body 3 and the operation of crosslinking the elastomer body 1 and the coating material 2 ′ are performed in the same manner as in the first embodiment.
　図１０は、エラストマー体１に成形されることとなる未架橋のコンパウンド１’と被覆材料２’とを金型４，５内で加熱および加圧して架橋し、エラストマー体１の成形および被覆層３の形成を行っている状態を示し、図１１は、完成した、被覆層２で被覆されたエラストマー体１を示している。本実施例では、被覆層２およびエラストマー体１の表面が下金型４の底面凹凸に沿った形状となって成形される。したがって、エラストマー体１の表面は下金型４の底面に対応する凹凸形状をなしている。 FIG. 10 shows the molding and coating layer of the elastomer body 1 by cross-linking the uncrosslinked compound 1 ′ and the coating material 2 ′ to be molded into the elastomer body 1 by heating and pressing in the molds 4 and 5. FIG. 11 shows the completed elastomer body 1 covered with the coating layer 2. In the present embodiment, the surfaces of the coating layer 2 and the elastomer body 1 are molded into a shape along the bottom surface unevenness of the lower mold 4. Therefore, the surface of the elastomer body 1 has an uneven shape corresponding to the bottom surface of the lower mold 4.
　本発明の被覆層２で被覆されたエラストマー体１の製造方法は、このようにエラストマー体１の形状が複雑であったり、表面に凹凸があっても、被覆層２を均一な厚さに形成することができる。 The manufacturing method of the elastomer body 1 coated with the coating layer 2 according to the present invention forms the coating layer 2 with a uniform thickness even when the shape of the elastomer body 1 is complicated or the surface is uneven. can do.
　図１２～１６は本発明の実施例９を示している。本実施例は被覆層を複数層とする例である。 12 to 16 show Embodiment 9 of the present invention. This embodiment is an example in which a plurality of coating layers are used.
　まず、図１２のように、溶媒に溶かし高粘性液体とした第一の被覆材料２ａ’を膜状体３に薄く塗布し、乾燥後、溶媒に溶かし高粘性液体とした第二の被覆材料２ｂ’を第一の被覆材料２ａ’の上に薄く塗布する。 First, as shown in FIG. 12, a first coating material 2a 'dissolved in a solvent to give a highly viscous liquid is thinly applied to the film-like body 3, dried, and then dissolved in a solvent to give a highly viscous liquid 2b. Apply a thin layer of 'on the first coating material 2a'.
　第二の被覆材料２ｂ’の乾燥後、第一および第二の被覆材料２ａ’，２ｂ’を２層に塗布された膜状体３を図１３のように下金型４内に収容し、その上にエラストマー体１に成形されることとなる未架橋のコンパウンド１’を置く。 After drying the second coating material 2b ′, the film-like body 3 in which the first and second coating materials 2a ′ and 2b ′ are applied in two layers is accommodated in the lower mold 4 as shown in FIG. An uncrosslinked compound 1 ′ to be molded into the elastomer body 1 is placed thereon.
　次に、図１４のように上金型５を閉め、コンパウンド１’と膜状体３に塗布された第二の被覆材料２ｂ’とを互いに接触させた状態で加熱および加圧する。すると、コンパウンド１’のエラストマーが架橋されてシート状のエラストマー体１に成形されるとともに第一および第二の被覆材料２ａ’，２ｂ’のエラストマーもそれぞれ架橋されて第一および第二の被覆層２ａ，２ｂを形成し、かつエラストマー体１と第二の被覆層２ｂとの界面においてはエラストマー体１側のエラストマーと第二の被覆層２ｂのエラストマーとが共架橋し、第一の被覆層２ａと第二の被覆層２ｂの界面においては第一の被覆層２ａのエラストマーと第二の被覆層２ｂのエラストマーとが共架橋する。 Next, as shown in FIG. 14, the upper mold 5 is closed, and the compound 1 'and the second coating material 2b' applied to the film-like body 3 are heated and pressurized while being in contact with each other. Then, the elastomer of the compound 1 ′ is cross-linked to be formed into a sheet-like elastomer body 1, and the elastomers of the first and second coating materials 2a ′ and 2b ′ are also cross-linked to form the first and second coating layers. 2a and 2b, and at the interface between the elastomer body 1 and the second coating layer 2b, the elastomer on the elastomer body 1 side and the elastomer of the second coating layer 2b are co-crosslinked to form the first coating layer 2a. The elastomer of the first coating layer 2a and the elastomer of the second coating layer 2b are co-crosslinked at the interface between the first coating layer 2b and the second coating layer 2b.
　次に、金型４，５から第一および第二の被覆層２ａ，２ｂで被覆されたエラストマー体１を膜状体３とともに取り出し、図１５のように膜状体３を第一の被覆層２ａから剥離する。図１６は、膜状体３を剥離された後の、第一および第二の被覆層２ａ，２ｂで被覆されたエラストマー体１を示している。 Next, the elastomer body 1 covered with the first and second coating layers 2a and 2b is taken out from the molds 4 and 5 together with the film-like body 3, and the film-like body 3 is taken as the first coating layer as shown in FIG. Peel from 2a. FIG. 16 shows the elastomer body 1 covered with the first and second coating layers 2a and 2b after the film-like body 3 is peeled off.
　本実施例では、エラストマー体１と第一の被覆層２ａとが共架橋しないものであったり、共架橋しても架橋強度が弱い場合でも、エラストマー体１と第一の被覆層２ａとの双方に強く共架橋する第二の被覆層２ｂをエラストマー体１と第一の被覆層２ａとの間に設けることにより、エラストマー体１を第一の被覆層２ａで強固に被覆できる。 In the present embodiment, both the elastomer body 1 and the first coating layer 2a are not co-crosslinked between the elastomer body 1 and the first coating layer 2a, even if the elastomer body 1 and the first coating layer 2a are weakly crosslinked even if co-crosslinked. By providing the second coating layer 2b that strongly co-crosslinks between the elastomer body 1 and the first coating layer 2a, the elastomer body 1 can be firmly coated with the first coating layer 2a.
　また、エラストマー体１と第一の被覆層２ａ（第一の被覆材料２ａ’）とが強く共架橋する場合でも、それぞれ別の機能を果たす複数の被覆層２ａ，２ｂをエラストマー体１に強固に被覆するという目的にも使用できる。 Further, even when the elastomer body 1 and the first coating layer 2a (first coating material 2a ′) are strongly co-crosslinked, the plurality of coating layers 2a and 2b each having a different function are firmly attached to the elastomer body 1. It can also be used for the purpose of coating.
　なお、本実施例では、エラストマー体１に被覆される被覆層を２層としているが、本発明においては、被覆層を３層以上としてもよい。 In this embodiment, two coating layers are coated on the elastomer body 1. However, in the present invention, three or more coating layers may be used.
　また、本実施例では、被覆層相互が共架橋するようにしているが、被覆層を構成する材料によっては、被覆層相互が共架橋しなくても被覆層相互が強固に結合する場合がある。そのような場合には、被覆層相互は共架橋しないようにしてもよい。 Further, in this embodiment, the coating layers are co-crosslinked, but depending on the material constituting the coating layer, the coating layers may be firmly bonded to each other even if the coating layers are not co-crosslinked. . In such a case, the coating layers may not be co-crosslinked.
　本実施例はパッキン類の製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、ＳＢＲに補強材、架橋剤およびその他の添加物を配合したものとした。第一の被覆材料は高ニトリルＮＢＲ（アクリロニトリルブタジエンゴム）に各種添加物を配合したものとし、第二の被覆材料は低ニトリルＮＢＲに各種添加物を配合したものとした。膜状体としてはＰＥＴ、被覆材料を溶かす溶媒としてはトルエンにアセトンを混合したものをそれぞれ使用した。 This example is an example in which the present invention is applied to the manufacture of packings. In this example, the compound to be molded into the elastomer body was prepared by blending a reinforcing material, a crosslinking agent and other additives into SBR. The first coating material was made by blending various additives with high nitrile NBR (acrylonitrile butadiene rubber), and the second coating material was made by blending various additives with low nitrile NBR. PET was used as the film-like body, and toluene mixed with acetone was used as the solvent for dissolving the coating material.
　実施例９と同様の工程を行うことにより（ただし、金型はエラストマー体がパッキン類の形状に成形されるように構成する）、高ニトリルＮＢＲからなる第一の被覆層および低ニトリルＮＢＲからなる第二の被覆層で被覆された、ＳＢＲからなるエラストマー体が得られる（本実施例の場合、この第一および第二の被覆層で被覆されたエラストマー体がパッキン類となる）。 By performing the same steps as in Example 9 (however, the mold is configured so that the elastomer body is formed into a packing shape), the first coating layer made of high nitrile NBR and the low nitrile NBR are made. An elastomer body made of SBR coated with the second coating layer is obtained (in this embodiment, the elastomer body coated with the first and second coating layers is a packing).
　本実施例においては、第一の被覆層が高ニトリルＮＢＲからなるので、優れた耐油性を得ることができる。 In this embodiment, the first coating layer is made of high nitrile NBR, so that excellent oil resistance can be obtained.
　また、高ニトリルＮＢＲとエラストマー体のＳＢＲとは強く共架橋しないが、低ニトリルＮＢＲは高ニトリルＮＢＲとＳＢＲの双方に強く共架橋するので、エラストマー体に第二の被覆層を介して第一の被覆層を強固に被覆できる。 Also, the high nitrile NBR and the SBR of the elastomer body do not co-crosslink strongly, but the low nitrile NBR strongly co-crosslinks to both the high nitrile NBR and SBR. The coating layer can be firmly coated.
　本実施例はベルト類の製造に本発明を適用した例である。本実施例においては、エラストマー体に成形されることとなるコンパウンドは、ＥＰＤＭに補強材、架橋剤およびその他の添加物を配合したものとした。第一の被覆材料はシリコーンゴムに各種添加物を配合したものとし、第二の被覆材料はＳＥラバーに各種添加物を配合したものとした。膜状体としてはＯＰＰ、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 This example is an example in which the present invention is applied to the manufacture of belts. In this example, the compound to be molded into the elastomer body was obtained by blending EPDM with a reinforcing material, a crosslinking agent and other additives. The first coating material was formulated with various additives in silicone rubber, and the second coating material was formulated with various additives in SE rubber. OPP was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
　実施例９と同様の工程を行うことにより（ただし、金型はエラストマー体がベルト類の形状に成形されるように構成する）、シリコーンゴムからなる第一の被覆層およびＳＥラバーからなる第二の被覆層で被覆された、ＥＰＤＭからなるエラストマー体が得られる。 By performing the same steps as in Example 9 (however, the mold is configured so that the elastomer body is molded into the shape of belts), the first covering layer made of silicone rubber and the second made of SE rubber. An elastomer body made of EPDM coated with the above coating layer is obtained.
　本実施例においては、第一の被覆層がシリコーンゴムからなるので、優れた撥水性を得ることができる。 In this embodiment, since the first coating layer is made of silicone rubber, excellent water repellency can be obtained.
　また、シリコーンゴムとエラストマー体のＥＰＤＭとは強く共架橋しないが、ＳＥラバーはシリコーンゴムとＥＰＤＭの双方に強く共架橋するので、エラストマー体に第二の被覆層を介して第一の被覆層を強固に被覆できる。 In addition, silicone rubber and EPDM of the elastomer body do not co-crosslink strongly, but SE rubber strongly co-crosslinks both the silicone rubber and EPDM, so the first coating layer is attached to the elastomer body via the second coating layer. Can be coated firmly.
　本実施例は被覆層を複数層とするが、被覆層相互間は共架橋しない例であり、かつ卓球ラケット用ラバーシートの製造に本発明を適用した例である。 This example is an example in which a plurality of coating layers are used, but the coating layers are not co-crosslinked, and the present invention is applied to the production of a rubber sheet for table tennis rackets.
　本実施例においては、エラストマー体に成形されることとなるコンパウンドは、天然ゴムに補強材、架橋剤およびその他の添加物を配合したものとした。第一の被覆材料は熱可塑性エラストマーであるＳＥＰＳ（スチレン・エチレン・プロピレン・スチレン共重合体）に各種添加物を配合したものとし、第二の被覆材料は熱可塑性エラストマーであるＳＩＳ（スチレン・イソプレン・スチレン共重合体）に各種添加物を配合したものとした。膜状体としてはＰＥＴ、被覆材料を溶かす溶媒としてはトルエンをそれぞれ使用した。 In this example, the compound to be molded into an elastomer body was a mixture of natural rubber with a reinforcing material, a crosslinking agent and other additives. The first coating material is a thermoplastic elastomer SEPS (styrene / ethylene / propylene / styrene copolymer) blended with various additives, and the second coating material is a thermoplastic elastomer SIS (styrene / isoprene).・ Styrene copolymer) was blended with various additives. PET was used as the film-like body, and toluene was used as the solvent for dissolving the coating material.
　実施例９と同様の工程を行うことにより、ＳＥＰＳからなる第一の被覆層およびＳＩＳからなる第二の被覆層で被覆された、天然ゴムからなるエラストマー体が得られる（本実施例の場合、この第一および第二の被覆層で被覆されたエラストマー体が卓球ラケット用ラバーシートとなる）。 By performing the same steps as in Example 9, an elastomer body made of natural rubber coated with the first coating layer made of SEPS and the second coating layer made of SIS is obtained (in the case of this example, The elastomer body coated with the first and second coating layers is a table tennis racket rubber sheet).
　本実施例では、エラストマー体と第二の被覆層とは共架橋するが、第一の被覆層と第二の被覆層とは共架橋しない。しかし、共架橋しなくてもＳＥＰＳからなる第一の被覆層とＳＩＳからなる第二の被覆層とは強固に結合するので、エラストマー体に第二の被覆層を介して第一の被覆層を強固に被覆できる。 In this embodiment, the elastomer body and the second coating layer are co-crosslinked, but the first coating layer and the second coating layer are not co-crosslinked. However, since the first coating layer made of SEPS and the second coating layer made of SIS are firmly bonded without co-crosslinking, the first coating layer is attached to the elastomer body via the second coating layer. Can be coated firmly.
　また、本実施例においては、第一の被覆層がＳＥＰＳからなるので、優れた耐候性および粘着性を得ることができる。 In the present embodiment, since the first coating layer is made of SEPS, excellent weather resistance and adhesiveness can be obtained.
　なお、表面に大きな粘着性を必要としない場合は、第一の被覆層となる第一の被覆材料として、熱可塑性エラストマーであるＳＥＢＳ（スチレン・エチレン・ブチレン・スチレン共重合体）、第二の被覆材料として、熱可塑性エラストマーであるＳＢＳ（スチレン・ブタジエン・スチレン共重合体）をそれぞれ使用してもよい。 When the surface does not require large adhesiveness, SEBS (styrene / ethylene / butylene / styrene copolymer), which is a thermoplastic elastomer, is used as the first coating material for the first coating layer. As the coating material, SBS (styrene / butadiene / styrene copolymer) which is a thermoplastic elastomer may be used.
　図１７および１８は本発明の実施例１３を示している。これまでの実施例は、被覆層２がエラストマー体１の表面を全面的に覆う（非パターン状に覆う）例であったが、本実施例は、被覆層２をプリント基板のプリントパターンと同様なパターンや、模様や、文字や、図形等のパターン状とする例である。したがって、本実施例では、エラストマー体１の表面には被覆層２で覆われている部分と覆われていない部分とが生ずる。 17 and 18 show Embodiment 13 of the present invention. Although the examples so far have been examples in which the coating layer 2 covers the entire surface of the elastomer body 1 (covers in a non-patterned manner), the present example is similar to the printed pattern of the printed circuit board. This is an example of a simple pattern, a pattern, a character, a pattern such as a figure. Therefore, in the present embodiment, a portion covered with the coating layer 2 and a portion not covered are generated on the surface of the elastomer body 1.
　本実施例においては、エラストマー体１に成形されることとなるコンパウンドは、ＥＰＤＭに補強材、架橋剤およびその他の添加物を配合したものとした。被覆材料２’は、ＥＰＤＭに導電性カーボン粉末およびその他の添加物を配合したものとした。 In this example, the compound to be molded into the elastomer body 1 was prepared by blending a reinforcing material, a crosslinking agent and other additives into EPDM. The coating material 2 'was prepared by blending conductive carbon powder and other additives with EPDM.
　図１７のように膜状体３の表面に、トルエン等の溶媒に溶かされて高粘性液体とされた被覆材料２’を印刷によりパターン状に塗布する。 As shown in FIG. 17, a coating material 2 'dissolved in a solvent such as toluene and made into a highly viscous liquid is applied to the surface of the film-like body 3 in a pattern by printing.
　次に、実施例１の場合と同様に、金型内において、エラストマー体１に成形されることとなる未架橋のコンパウンドと膜状体３に塗布された被覆材料２’とを互いに接触させた状態で加熱および加圧し、エラストマー体１側ＥＰＤＭおよび被覆材料２’側のＥＰＤＭを架橋し、エラストマー体１と被覆層２との界面においてはエラストマー体１側のＥＰＤＭと被覆層２側のＥＰＤＭとを共架橋させる。 Next, as in the case of Example 1, the uncrosslinked compound to be molded into the elastomer body 1 and the coating material 2 ′ applied to the film-like body 3 were brought into contact with each other in the mold. The elastomer body 1 side EPDM and the coating material 2 ′ side EPDM are cross-linked by heating and pressurizing in the state, and at the interface between the elastomer body 1 and the coating layer 2, the EPDM on the elastomer body 1 side and the EPDM on the coating layer 2 side Are co-crosslinked.
　そして、その後、金型４，５から膜状体３とともにエラストマー体１を取り出し、膜状体３を被覆層２から剥離する。図１８は、完成した、パターン状をなす被覆層２で被覆されたエラストマー体１を示している。 Then, the elastomer body 1 is taken out from the molds 4 and 5 together with the film body 3, and the film body 3 is peeled from the coating layer 2. FIG. 18 shows the completed elastomer body 1 covered with a coating layer 2 having a pattern shape.
　本実施例では、導電性を有する被覆層２をエラストマー体１の表面上にパターン状をなすように形成できる。 In this embodiment, the conductive coating layer 2 can be formed in a pattern on the surface of the elastomer body 1.
　なお、前記各実施例では、被覆材料の方には架橋剤を配合していない。これは、被覆材料の方は、架橋剤を配合しないでも、エラストマー体に成形されることとなるエラストマーの方に配合されている架橋剤により架橋されるからであるが、必要があれば、被覆材料の方にも架橋剤を配合してもよい。 In each of the above examples, the coating material does not contain a crosslinking agent. This is because the coating material is cross-linked by the cross-linking agent blended in the elastomer that will be molded into the elastomer body without blending the cross-linking agent. You may mix | blend a crosslinking agent also toward the material.
　また、本発明は、前記各実施例に挙げた製品以外の製品にも広く適用できるものである。 Further, the present invention can be widely applied to products other than the products listed in the above embodiments.
　以上のように本発明による被覆層で被覆されたエラストマー体の製造方法は、ゴムや熱可塑性エラストマー等のエラストマーからなる各種エラストマー体の表面に被覆層を被覆する方法として有用である。 As described above, the method for producing an elastomer body coated with a coating layer according to the present invention is useful as a method for coating a coating layer on the surface of various elastomer bodies made of an elastomer such as rubber or thermoplastic elastomer.
　　１　　エラストマー体
　　１’　コンパウンド
　　２　　被覆層
　　２ａ　第一の被覆層
　　２ｂ　第二の被覆層
　　２’　被覆材料
　　２ａ’　第一の被覆材料
　　２ｂ’　第二の被覆材料
　　３　　膜状体
　　４　　下金型
　　５　　上金型 DESCRIPTION OF SYMBOLS 1 Elastomer body 1 'Compound 2 Coating layer 2a First coating layer 2b Second coating layer 2' Coating material 2a 'First coating material 2b' Second coating material 3 Film body 4 Lower mold 5 Upper metal Type

Claims (8)

  1. 　エラストマーを主成分とするエラストマー体の表面を組成が異なる被覆層で被覆してなる、被覆層で被覆されたエラストマー体の製造方法であって、
    　前記被覆層を構成させるべき被覆材料として、前記エラストマー体に成形されることとなる未架橋のエラストマーに接触した状態で加熱および加圧されると、前記エラストマー体との界面において前記エラストマー体側エラストマーと共架橋することとなるエラストマーを含む材料を用意する段階と、
    　前記被覆材料を溶媒に溶かして液状またはペースト状とする段階と、
    　前記液状またはペースト状とされた被覆材料を、前記エラストマー体に成形されることとなるエラストマーおよび前記被覆材料に含まれるエラストマーの架橋温度より高い融点を有する材料からなる膜状体上に塗布する段階と、
    　金型内において、前記エラストマー体に成形されることとなる未架橋のエラストマーと前記膜状体に塗布された前記被覆材料とを互いに接触させた状態で加熱および加圧し、前記エラストマー体側エラストマーおよび前記被覆材料に含まれるエラストマーを架橋することにより、前記エラストマー体を成形するとともに前記被覆材料に前記エラストマー体の表面を被覆する前記被覆層を形成させ、かつ前記エラストマー体と前記被覆層との界面においては前記エラストマー体側エラストマーと前記被覆材料に含まれるエラストマーとを共架橋させる段階とを有してなる、
    被覆層で被覆されたエラストマー体の製造方法。     A method for producing an elastomer body coated with a coating layer, wherein the surface of an elastomer body mainly composed of an elastomer is coated with a coating layer having a different composition,
    As a coating material for forming the coating layer, when heated and pressurized in contact with an uncrosslinked elastomer to be molded into the elastomer body, the elastomer body side elastomer at the interface with the elastomer body Providing a material comprising an elastomer that will be co-crosslinked;
    Dissolving the coating material in a solvent to form a liquid or paste;
    Applying the liquid or paste-like coating material onto a film-like body made of an elastomer to be molded into the elastomer body and a material having a melting point higher than the crosslinking temperature of the elastomer contained in the coating material When,
    In the mold, the uncrosslinked elastomer to be molded into the elastomer body and the coating material applied to the film-like body are heated and pressed in contact with each other, the elastomer body side elastomer and the The elastomer contained in the coating material is crosslinked to form the elastomer body and form the coating layer on the surface of the elastomer body on the coating material, and at the interface between the elastomer body and the coating layer. Comprises co-crosslinking the elastomer body side elastomer and the elastomer contained in the coating material,
    A method for producing an elastomer body coated with a coating layer.
  2. 　前記膜状体のうちの前記被覆材料を塗布される面は粗面化されている請求項１記載の被覆層で被覆されたエラストマー体の製造方法。 The method for producing an elastomer body coated with a coating layer according to claim 1, wherein a surface of the film-like body to which the coating material is applied is roughened.
  3. 　前記被覆材料を前記膜状体上に非パターン状に塗布することにより、前記エラストマー体の表面に被覆される前記被覆層が非パターン状となるようにする請求項１または２記載の被覆層で被覆されたエラストマー体の製造方法。 The coating layer according to claim 1 or 2, wherein the coating material is applied to the film-like body in a non-patterned manner so that the coating layer coated on the surface of the elastomeric body becomes a non-patterned shape. A method for producing a coated elastomer body.
  4. 　前記液状またはペースト状とされた被覆材料を前記膜状体上にパターン状に塗布することにより、前記エラストマー体の表面に被覆される前記被覆層がパターン状となるようにする請求項１または２記載の被覆層で被覆されたエラストマー体の製造方法。 3. The coating material applied in a pattern on the film-like body so that the liquid or paste-like coating material is applied so that the coating layer coated on the surface of the elastomer body has a pattern. The manufacturing method of the elastomer body coat | covered with the coating layer of description.
  5. 　前記エラストマー体と共架橋することとなる前記被覆材料を前記膜状体上に塗布する段階の前に、前記被覆材料とは組成が異なり、かつ前記被覆材料と共架橋する別の被覆材料を前記膜状体上に塗布する段階をさらに有し、
    　前記エラストマー体と共架橋することとなる前記被覆材料は前記別の被覆材料を介して前記膜状体上に塗布し、
    　前記加熱および加圧により、前記エラストマー体と共架橋する前記被覆層を、前記別の被覆材料により構成される被覆層とも共架橋させる請求項１乃至４のいずれか１項に記載の被覆層で被覆されたエラストマー体の製造方法。     Before the step of applying the coating material to be cross-linked with the elastomer body onto the film-like body, another coating material having a composition different from that of the coating material and co-crosslinking with the coating material is added. And further comprising a step of applying on the film-like body,
    The coating material to be co-crosslinked with the elastomer body is applied onto the film-like body via the other coating material,
    The coating layer according to any one of claims 1 to 4, wherein the coating layer co-crosslinked with the elastomer body is co-crosslinked with the coating layer composed of the other coating material by the heating and pressurization. A method for producing a coated elastomer body.
  6. 　前記エラストマー体と共架橋することとなる前記被覆材料を前記膜状体上に塗布する段階の前に、前記被覆材料とは組成が異なり、かつ前記被覆材料とは共架橋しない別の被覆材料を前記膜状体上に塗布する段階をさらに有し、
    　前記エラストマー体と共架橋することとなる前記被覆材料は前記別の被覆材料を介して前記膜状体上に塗布する請求項１乃至４のいずれか１項に記載の被覆層で被覆されたエラストマー体の製造方法。     Prior to the step of applying the coating material to be co-crosslinked with the elastomer body onto the film-like body, another coating material having a composition different from that of the coating material and not co-crosslinked with the coating material is provided. Further comprising applying to the film-like body;
    The elastomer coated with the coating layer according to any one of claims 1 to 4, wherein the coating material to be co-crosslinked with the elastomer body is applied onto the film-like body via the another coating material. Body manufacturing method.
  7. 　前記エラストマー体は天然ゴムまたはイソプレンゴムを主成分としており、前記被覆材料は耐候性が優れた材料であり、最終的に得られる前記被覆層で被覆された前記エラストマー体は卓球ラケット用ラバーシートとして使用される請求項１記載の被覆層で被覆されたエラストマー体の製造方法。 The elastomer body is mainly composed of natural rubber or isoprene rubber, the coating material is a material having excellent weather resistance, and the elastomer body coated with the coating layer finally obtained is used as a rubber sheet for table tennis rackets. The method for producing an elastomer body coated with a coating layer according to claim 1 used.
  8. 　前記エラストマー体は天然ゴムまたはイソプレンゴムを主成分としており、前記被覆材料は粘着性を付与する材料であり、最終的に得られる前記被覆層で被覆された前記エラストマー体は卓球ラケット用ラバーシートとして使用される請求項１記載の被覆層で被覆されたエラストマー体の製造方法。 The elastomer body is mainly composed of natural rubber or isoprene rubber, the coating material is a material imparting tackiness, and the elastomer body coated with the coating layer finally obtained is used as a rubber sheet for table tennis rackets. The method for producing an elastomer body coated with a coating layer according to claim 1 used.
PCT/JP2014/081681 2013-12-28 2014-12-01 Method of producing elastomer body covered with covering layer WO2015098431A1 (en)

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JPH0647760A (en) * 1992-07-28 1994-02-22 Three Bond Co Ltd Rubber molding method imparting lubricity to surface
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JPS62254874A (en) * 1986-04-28 1987-11-06 Hitachi Cable Ltd Pattern forming material to surface of rubber product
JPH04370120A (en) * 1991-06-17 1992-12-22 Polytec Design:Kk Rubber for table tennis racket
JPH0647760A (en) * 1992-07-28 1994-02-22 Three Bond Co Ltd Rubber molding method imparting lubricity to surface
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