WO2015163168A1 - コンベヤベルト用コートゴム組成物 - Google Patents
コンベヤベルト用コートゴム組成物 Download PDFInfo
- Publication number
- WO2015163168A1 WO2015163168A1 PCT/JP2015/061261 JP2015061261W WO2015163168A1 WO 2015163168 A1 WO2015163168 A1 WO 2015163168A1 JP 2015061261 W JP2015061261 W JP 2015061261W WO 2015163168 A1 WO2015163168 A1 WO 2015163168A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- parts
- rubber
- conveyor belt
- canvas
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 130
- 239000005060 rubber Substances 0.000 title claims abstract description 130
- 239000000203 mixture Substances 0.000 title claims abstract description 55
- 239000011248 coating agent Substances 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 title claims abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000006229 carbon black Substances 0.000 claims abstract description 38
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 27
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 16
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 16
- 229920001194 natural rubber Polymers 0.000 claims abstract description 16
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 13
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- OYPRJOBELJOOCE-IGMARMGPSA-N Calcium-40 Chemical group [40Ca] OYPRJOBELJOOCE-IGMARMGPSA-N 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 12
- 208000018747 cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome Diseases 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 241000872198 Serjania polyphylla Species 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 abstract description 21
- 238000002156 mixing Methods 0.000 abstract description 10
- 238000001179 sorption measurement Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 35
- 230000000052 comparative effect Effects 0.000 description 23
- 239000000047 product Substances 0.000 description 18
- 239000003795 chemical substances by application Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 229920003244 diene elastomer Polymers 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- -1 silicon halides Chemical class 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 125000005372 silanol group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 2
- OPNUROKCUBTKLF-UHFFFAOYSA-N 1,2-bis(2-methylphenyl)guanidine Chemical compound CC1=CC=CC=C1N\C(N)=N\C1=CC=CC=C1C OPNUROKCUBTKLF-UHFFFAOYSA-N 0.000 description 1
- SQZCAOHYQSOZCE-UHFFFAOYSA-N 1-(diaminomethylidene)-2-(2-methylphenyl)guanidine Chemical compound CC1=CC=CC=C1N=C(N)N=C(N)N SQZCAOHYQSOZCE-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000005370 alkoxysilyl group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 1
- WITDFSFZHZYQHB-UHFFFAOYSA-N dibenzylcarbamothioylsulfanyl n,n-dibenzylcarbamodithioate Chemical compound C=1C=CC=CC=1CN(CC=1C=CC=CC=1)C(=S)SSC(=S)N(CC=1C=CC=CC=1)CC1=CC=CC=C1 WITDFSFZHZYQHB-UHFFFAOYSA-N 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- REQPQFUJGGOFQL-UHFFFAOYSA-N dimethylcarbamothioyl n,n-dimethylcarbamodithioate Chemical compound CN(C)C(=S)SC(=S)N(C)C REQPQFUJGGOFQL-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- AUZONCFQVSMFAP-UHFFFAOYSA-N disulfiram Chemical compound CCN(CC)C(=S)SSC(=S)N(CC)CC AUZONCFQVSMFAP-UHFFFAOYSA-N 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- CMAUJSNXENPPOF-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-n-cyclohexylcyclohexanamine Chemical compound C1CCCCC1N(C1CCCCC1)SC1=NC2=CC=CC=C2S1 CMAUJSNXENPPOF-UHFFFAOYSA-N 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- HUMLQUKVJARKRN-UHFFFAOYSA-M sodium;n,n-dibutylcarbamodithioate Chemical compound [Na+].CCCCN(C([S-])=S)CCCC HUMLQUKVJARKRN-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- ASAOXGWSIOQTDI-UHFFFAOYSA-N triethoxy-[2-(2-triethoxysilylethyltetrasulfanyl)ethyl]silane Chemical compound CCO[Si](OCC)(OCC)CCSSSSCC[Si](OCC)(OCC)OCC ASAOXGWSIOQTDI-UHFFFAOYSA-N 0.000 description 1
- FBBATURSCRIBHN-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyldisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSCCC[Si](OCC)(OCC)OCC FBBATURSCRIBHN-UHFFFAOYSA-N 0.000 description 1
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 1
- JTTSZDBCLAKKAY-UHFFFAOYSA-N trimethoxy-[3-(3-trimethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCSSSSCCC[Si](OC)(OC)OC JTTSZDBCLAKKAY-UHFFFAOYSA-N 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
- B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Definitions
- the present invention relates to a coated rubber composition for a conveyor belt. More specifically, the present invention relates to a coating rubber composition for a conveyor belt which is suitably used as a coating rubber forming material used for adhesion between a cover rubber and a canvas of a conveyor belt and / or between canvases.
- the endless conveyor belt has a phenomenon that the end of the cover rubber turns up due to repeated bending at the head pulley and tail pulley, and the end of the endless joint is peeled off.
- the cover rubber is thick, peeling is likely to occur.
- the conveyor belt may be cut due to wear or deterioration.
- a coating rubber forming material is used between the cover rubber and the canvas or between the canvases.
- a coat rubber forming material is used in both of them.
- the adhesion between the coated rubber and the canvas is good, the durability of the conveyor belt is excellent.
- the endless work of the conveyor belt it is difficult to peel off the canvas as the core. There are many. The same can be said for the canvases.
- a technique such as increasing the amount of calcium carbonate contained in the coated rubber-forming material has been taken, but this has a problem of deteriorating durability.
- the applicant firstly bonded the cover rubber and the canvas and / or between the canvases when producing the endless belt by joining the end portions of the conveyor belt formed by bonding the canvas and the cover rubber.
- a coating rubber forming material used for coating endless work is facilitated by moderately reducing its adhesive strength, but compared with the case where the peel strength is reduced by increasing the amount of calcium carbonate, the cover rubber and the canvas
- a coated rubber composition for conveyor belts with improved adhesion durability is proposed. That is, in a rubber composition in which carbon black and calcium carbonate are blended as fillers in a diene rubber, a blend rubber comprising 82.5 to 52.5% by mass of a diene rubber and 17.5 to 47.5% by mass of a rubber content in the recycled rubber is used.
- a coated rubber composition for conveyor belts using 10 to 85 parts by mass of calcium carbonate per 100 parts by mass of blend rubber has been proposed (Patent Document 3).
- this coated rubber composition for conveyor belts is used for forming a reinforcing layer as a coating rubber forming material between the cover rubber of the conveyor belt and the canvas, between the canvases, or both, between them.
- the adhesive strength is reduced moderately, endless work with peeling is facilitated, and the durability of the adhesion is ensured during that time, enabling it to run stably as a conveyor belt for a long time.
- the coat rubber used between the cover rubber and the canvas and between the canvases is required to have a high peel strength and good adhesion to the canvas from the viewpoint of durability.
- a high peel force it is also possible to add a small particle size carbon black to the coat rubber to obtain a high peel force, but in this case, the rubber on the peel surface (after the peel test, The rubber adhering to the surface of the canvas is visually observed, and the ratio of 100% when the destruction due to peeling occurs on the entire surface of the coated rubber layer is reduced.
- there is a method of blending carbon black having a large particle diameter or a large amount of calcium carbonate in order to improve the adhesion of the release surface with rubber but in this case, the peeling force is lowered.
- the peeling force on the adhesive surface and the rubber attachment are in a trade-off relationship, and these cannot be satisfied simultaneously.
- the Applicant has further improved both the peel force between the cover rubber and the canvas or between the canvases and the rubber as a coating rubber forming material used for bonding between the cover rubber and the canvas and / or between the canvases.
- a coated rubber composition for a conveyor belt capable of giving a vulcanizate a rubber composition in which carbon black and calcium carbonate are blended with a diene rubber as a filler, the diene rubber is 83.0 to 97.5% by mass, and the rubber content in the recycled rubber is 2.5.
- Blend rubber consisting of ⁇ 17.0% by mass is used.
- Carbon black with 45 ⁇ 75 parts by mass of carbon black with nitrogen adsorption specific surface area of 30 ⁇ 50m 2 / g and DBP oil absorption of 95 ⁇ 125ml / 100g per 100 parts by mass of blend rubber and 5 ⁇ of calcium carbonate A coated rubber composition for conveyor belts using 50 parts by mass has been proposed (Patent Document 4).
- the conventional coated rubber pursued only adhesion to the canvas, but in a conveyor belt that requires power saving, it is necessary to reduce the energy loss of the core part. Since energy loss occurs when the conveyor belt bends due to the load during traveling of the conveyor belt, a coated rubber that reduces the energy loss is demanded.
- An adhesive compounding agent can be blended in order to improve the rubber attachment at the time of overvulcanization, but in this case, it is unavoidable that the peel strength at the time of vulcanization usually decreases.
- the main object of the present invention is not only to improve the peeling force, which is a measure of adhesion to canvas, but also to improve the power saving performance while maintaining the durability of the conveyor belt in the coated rubber composition for conveyor belts. There is.
- Another object of the present invention is to provide a coated rubber composition for a conveyor belt, which can secure a rubber with a canvas at the time of over-vulcanization while maintaining a peeling force and a low energy loss at the time of normal vulcanization, and has good adhesion. Achieved by:
- the main objects of the present invention are 15 to 75 parts by mass of carbon black having a nitrogen adsorption specific surface area of 50 m 2 / g or less and 100 to 100 parts by mass of calcium carbonate per 100 parts by mass of blend rubber of natural rubber, butadiene rubber and SBR. And a coated rubber composition for a conveyor belt, which is formed by blending a part and an oil of 40 parts by mass or less.
- Another object of the present invention is to change the amount of carbon black to 10 to 65 parts by mass and the amount of calcium carbonate to 20 to 100 parts by mass in the coated rubber composition for conveyor belts, and further incorporate 5 to 20 parts by mass of silica. Achieved by the rubber composition.
- the coated rubber composition for conveyor belts according to the present invention, 15 to 70 parts by mass of carbon black having a specific property per 100 parts by mass of blend rubber, 25 to 100 parts by mass of calcium carbonate, and 40 parts by mass or less of oil, By blending preferably 10 to 35 parts by mass, not only can the adhesion of the conveyor belt to the canvas be improved, but also its power saving can be improved while maintaining its durability.
- a blend rubber of natural rubber and at least one of butadiene rubber and SBR is used.
- natural rubber is used in a proportion of 15 to 65% by mass, preferably 25 to 55% by mass
- butadiene rubber and SBR are used in a proportion of 85 to 35% by mass, preferably 75 to 45% by mass. If the blend ratio of the natural rubber is used outside this range, the rubber attachment becomes worse.
- SBR any of emulsion polymerization SBR, solution polymerization SBR, and these oil-extended products can be used.
- Carbon black having a nitrogen adsorption specific surface area of 50 m 2 / g or less specifically, GPF carbon black, FEF carbon black, SRF carbon black, etc., preferably 15 to 70 parts by mass per 100 parts by mass of blend rubber. Is used in a proportion of 20 to 65 parts by mass. When the amount of carbon black is less than this, the rubber attachment is worsened, while when it is used more than this, the energy loss is increased. Further, when a material having a nitrogen adsorption specific surface area larger than this, for example, HAF carbon black is used, energy loss increases.
- Calcium carbonate is used in a proportion of 25 to 100 parts by mass, preferably 30 to 70 parts by mass, per 100 parts by mass of the blend rubber. If the amount of calcium carbonate is less than this, the rubber attachment will be poor, while if it is used more than this, the peel force will be low and the hardness will be large.
- oil As the oil, aroma oil, paraffin oil, etc. are used, and the oil content in the oil-extended SBR is also converted to this.
- the oil is used in an amount of 40 parts by mass or less, preferably 10 to 35 parts by mass, per 100 parts by mass of the blend rubber. When the amount of oil is used at a rate higher than this, energy loss increases. In Examples of Patent Documents 3 to 4, oil is used at a rate higher than this.
- the carbon black amount is 10 to 65 parts by mass and the calcium carbonate amount is 20 to 100 parts by mass, respectively.
- a modified rubber composition containing 5 to 20 parts by mass of silica is used.
- silica increases the hardness and tan ⁇ values, so the carbon black amount and calcium carbonate amount are slightly changed to adjust these values.
- Silica having a BET specific surface area (according to ASTM D1993-03) of 70 to 200 m 2 / g, preferably 70 to 190 m 2 / g, is used from the viewpoints of reinforcement and dispersibility.
- These include dry process silica manufactured by pyrolysis of silicon halides or organosilicon compounds, and wet process silica manufactured by decomposition of sodium silicate with acid. Therefore, wet method silica is preferably used.
- a commercial product marketed for the rubber industry can be used as it is.
- the blending ratio is generally 5 to 20 parts by weight, preferably 10 to 15 parts by weight per 100 parts by weight of the blend rubber, and the blending of silica improves the rubber attachment with the canvas during overvulcanization.
- the blending ratio of silica is less than this, the rubber attachment with the desired canvas is not improved.
- the blending ratio is higher than this, the energy loss increases.
- silica has poor affinity with rubber polymers, and silica in rubber forms hydrogen bonds through silanol groups, and silica is incorporated into rubber.
- silane coupling agent In order to improve (having the property of reducing dispersibility), it is preferable to incorporate a silane coupling agent.
- silane coupling agent examples include polysulfide silane coupling agents having an alkoxysilyl group that reacts with a silanol group on a silica surface and a sulfur chain that reacts with a polymer, such as bis (3-triethoxysilylpropyl) tetrasulfide, bis (2 -Triethoxysilylethyl) tetrasulfide, bis (3-trimethoxysilylpropyl) tetrasulfide, bis (3-triethoxysilylpropyl) disulfide and the like are preferably used.
- polysulfide silane coupling agents having an alkoxysilyl group that reacts with a silanol group on a silica surface and a sulfur chain that reacts with a polymer, such as bis (3-triethoxysilylpropyl) tetrasulfide, bis (2 -Triethoxysilylethyl) tetras
- Vulcanization of conveyor belt coat rubber composition is sulfur and thiazole (MBT, MBTS, ZnMBT, etc.), sulfenamide (CBS, DCBS, BBS, etc.), guanidine (DPG, DOTG, OTBG, etc.), thiuram (TMTD, TMTM, TBzTD, TETD, TBTD, etc.), dithiocarbamate (ZTC, NaBDC, etc.), xanthate (ZnBX, etc.), etc.
- Sulfur or various vulcanization accelerators are used in a ratio of about 1 to 5 parts by weight, preferably about 2 to 4 parts by weight, per 100 parts by weight of the blend rubber. Over-vulcanization occurs even when the amount of sulfur used or various vulcanization accelerators is large, but the effect of vulcanization time is much greater than that.
- the coated rubber composition for conveyor belts according to the present invention includes, in addition to the above components, a vulcanization aid, a vulcanization retarder, and various compounding agents such as carbon black, carbonic acid as long as the object of the present invention is not impaired.
- Various reinforcing agents (fillers) other than calcium and silica, anti-aging agents, antioxidants, pigments (dyes), plasticizers, flame retardants, solvents, surfactants (including leveling agents), dispersants, dehydrating agents, A rust preventive agent, an adhesion imparting agent, an antistatic agent, a filler (filler), a processing aid and the like are appropriately blended.
- the resulting coated rubber composition for conveyor belts is kneaded using a roll, kneader, Banbury mixer, etc., and then used as a coated rubber forming material between the conveyor belt cover rubber and the canvas or between the canvases (or both of them). ).
- a calender roll or the like is used to compress the coated rubber composition for a conveyor belt onto both sides of a canvas to form a sheet-like reinforcing layer, and then, at least one or more layers of the sheet-like reinforcing layer are laminated, and above and below each. Laminate upper and lower cover rubber. Thereafter, for example, by applying pressure at a temperature of about 140 to 170 ° C.
- the canvas is used as a core reinforcing layer in which organic fibers such as nylon, polyester, vinylon, and aramid are woven into a canvas.
- the belt body when used as an endless belt with its end portions joined together, it will be in a state of over-vulcanization by vulcanization for a long time, such as re-vulcanization by the endless portion, Therefore, the vulcanization time is extended to about 90 to 150 minutes.
- Example 1 Natural rubber (RSS # 3) 50 parts by mass Butadiene rubber 50 ⁇ GPF carbon black (N 2 adsorption specific surface area 29m 2 / g) 37 ⁇ Calcium carbonate 30 ⁇ Aroma oil (Sankyo Oil Chemicals A-OMIX) 22.50 ⁇ Sulfur 2.5 ⁇ Vulcanization accelerator CZ (Ouchi New Chemical Products) 1.0 ⁇ The above components were kneaded with a Banbury mixer or the like to prepare a coated rubber composition for a conveyor belt.
- Example 2 In Example 1, instead of butadiene rubber, 68.74 parts by mass of oil-extended SBR (Nippon ZEON product Nipol 1723) (50 parts by mass as SBR, 18.74 parts by mass of oil) was used, and the amount of aroma oil was 3.80 parts by mass ( The total oil content was changed to 22.54 parts by mass).
- SBR oil-extended SBR
- Example 3 In Example 1, the amount of butadiene rubber was changed to 24.54 parts by mass, and 35.00 parts by mass of oil-extended SBR (Nipol 1723) (25.46 parts by mass as SBR, 9.54 parts by mass of oil) was used. Changed to 13.00 parts by mass (total oil content 22.54 parts by mass).
- Example 4 In Example 3, the same amount of FEF carbon black (nitrogen adsorption specific surface area 42 m 2 / g) was used instead of GPF carbon black.
- Example 5 In Example 3, the same amount of SRF carbon black (nitrogen adsorption specific surface area of 24 m 2 / g) was used instead of GPF carbon black.
- Example 6 In Example 4, the amount of natural rubber is 19.88 parts by mass, the amount of butadiene rubber is 46.96 parts by mass, the amount of oil-extended SBR is 45.60 parts by mass (33.16 parts by mass for SBR, 12.44 parts by mass for oil), and the amount of aroma oil Were changed to 20.00 parts by mass (total oil content 32.44 parts by mass), and 50.0 parts by mass of FEF carbon black was used.
- Calendar processability Mooney scorch is measured according to unvulcanized rubber JIS K6300-1: 2013. , Screw minimum Here, it is preferable that the minimum screw value is 20 to 40.
- Table 1 Measurement item 1 actual 2 actual 3 actual 4 actual 5 actual 6 Normal physical properties 100% modulus (MPa) 1.8 1.9 1.8 2.1 1.6 2.1 Hardness 52 51 51 54 50 54 Adhesion to canvas Peeling force (N / mm) 7.8 7.5 8.2 7.9 7.3 8.9 With rubber (%) 80 65 65 70 60 90 Vm (point) 25.3 31.4 28.9 30.9 27.7 28.3 tan ⁇ (20 ° C) 0.090 0.117 0.099 0.121 0.088 0.148
- Example 3 Comparative Example 5 In Example 3, the amount of natural rubber is 39.77 parts by mass, the amount of butadiene rubber is 27.07 parts by mass, the amount of oil-extended SBR is 45.60 parts by mass (33.16 parts by mass for SBR, 12.44 parts by mass for oil), and the amount of aroma oil Was changed to 30.00 parts by mass (total oil content 42.44 parts by mass), and 63.0 parts by mass of FEF carbon black was used instead of GPF carbon black.
- Example 3 Comparative Example 6 In Example 3, the amount of oil-extended SBR was changed to 103.75 parts by mass (75.46 parts by mass as SBR and 28.29 parts by mass as the oil content), and natural rubber and aroma oil were not used.
- Example 6 Comparative Example 7 In Example 6, the amount of natural rubber was changed to 66.84 parts by mass, and the amount of oil-extended SBR was changed to 45.60 parts by mass (33.16 parts by mass as SBR, 12.44 parts by mass as oil component ⁇ total amount of oil component 32.44 parts by mass>).
- Example 8 In Example 2 in which no butadiene rubber was used, the amount of natural rubber was 25.00 parts by mass, the amount of oil-extended SBR was 64.93 parts by mass (47.22 parts by mass for SBR, 17.71 parts by mass for oil), and the amount of GPF carbon black was 10.00 parts by weight, calcium carbonate amount changed to 80.00 parts by weight, aroma oil amount changed to 3.00 parts by weight, and tire regeneration rubber class A (Muraoka Rubber Industrial Products tire Riku purple line) 55.56 parts by weight (rubber content 27.78 parts by weight) Parts, carbon content 16.67 parts by mass ⁇ carbon content total amount 26.67 parts by mass>, oil content 11.11 parts by mass ⁇ oil content total amount 31.82 parts by mass>).
- tire regeneration rubber class A Meloka Rubber Industrial Products tire Riku purple line
- Example 9 In Example 2 in which no butadiene rubber was used, the amount of natural rubber was 30.00 parts by mass, the amount of oil-extended SBR was 74.20 parts by mass (53.97 parts by mass as SBR, 20.23 parts by mass as oil), and the amount of GPF carbon black was The amount of calcium carbonate was changed to 61.00 parts by mass, the amount of aroma oil was changed to 28.00 parts by mass, and the tire regeneration rubber class A (Tire Riku purple line) was 32.00 parts by mass (16.00 parts by mass of rubber, carbon content). 9.60 parts by mass ⁇ total amount of carbon 69.60 parts by mass> and 6.40 parts by mass of oil ⁇ total amount of oil 54.63 parts by mass>) were used.
- Example 7 Regarding the coated rubber composition for conveyor belts prepared in Example 3, various properties of ordinary vulcanized product (vulcanized at 150 ° C. for 30 minutes) were measured, and over-vulcanized product (vulcanized at 150 ° C. for 140 minutes). The adhesion to canvas (peeling force against polyester canvas and with rubber) was measured.
- Example 8 In Example 7, the amount of GPF carbon black was changed to 32 parts by mass, the amount of calcium carbonate was changed to 25 parts by mass, and 10 parts by mass of silica (product of Tosoh Silica Co., Ltd. nip seal AQ) was blended. The same measurement was performed on the pervulcanized product.
- silica product of Tosoh Silica Co., Ltd. nip seal AQ
- Example 9 In Example 8, the amount of GPF carbon black was changed to 29 parts by mass, the amount of calcium carbonate was changed to 20 parts by mass, and the amount of silica was changed to 15 parts by mass. It was.
- Example 8 Comparative Example 10 In Example 8, the amount of GPF carbon black was changed to 17 parts by mass and the amount of silica was changed to 30 parts by mass, and the same measurement was performed for the normal vulcanized product and the overvulcanized product.
- Example 7 the overvulcanized product with rubber is barely 60%.
- Example 8 in which 10 parts by mass of silica was blended, the overvulcanized product with rubber was greatly improved.
- Example 9 in which 20 parts by mass of calcium carbonate and 15 parts by mass of silica were blended, the rubberization of the overvulcanized product was greatly improved.
- Comparative Example 10 in which 30 parts by mass of silica was blended, the screw minimum value was high, Not only does the calendar workability deteriorate, but the value of tan ⁇ (20 ° C) is high and the energy loss is large.
- Adhesive compounding agent improves the adhesion of overvulcanized materials to canvas, Usually, the adhesiveness (peeling force) of vulcanizate to canvas is lowered.
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Abstract
Description
天然ゴム(RSS#3) 50質量部
ブタジエンゴム 50 〃
GPFカーボンブラック(N2吸着比表面積29m2/g) 37 〃
炭酸カルシウム 30 〃
アロマオイル(三共油化工業製品A-OMIX) 22.50 〃
硫黄 2.5 〃
加硫促進剤CZ(大内新興化学工業製品) 1.0 〃
以上の各成分をバンバリーミキサ等で混練し、コンベヤベルト用コートゴム組成物を調製した。
実施例1において、ブタジエンゴムの代わりに、油展SBR(日本ゼオン製品Nipol 1723)68.74質量部(SBRとして50質量部、オイル分18.74質量部)が用いられ、またアロマオイル量が3.80質量部(オイル分合計量22.54質量部)に変更された。
実施例1において、ブタジエンゴム量が24.54質量部に変更され、さらに油展SBR(Nipol 1723)が35.00質量部(SBRとして25.46質量部、オイル分9.54質量部)が用いられ、さらにアロマオイル量も13.00質量部(オイル分合計量22.54質量部)に変更された。
実施例3において、GPFカーボンブラックの代わりに、同量のFEFカーボンブラック(窒素吸着比表面積42m2/g)が用いられた。
実施例3において、GPFカーボンブラックの代わりに、同量のSRFカーボンブラック(窒素吸着比表面積24m2/g)が用いられた。
実施例4において、天然ゴム量が19.88質量部に、ブタジエンゴム量が46.96質量部に、油展SBR量が45.60質量部(SBRとして33.16質量部、オイル分として12.44質量部)に、アロマオイル量が20.00質量部(オイル分合計量32.44質量部)にそれぞれ変更され、FEFカーボンブラックが50.0質量部用いられた。
常態物性:この組成物を150℃、30分間プレス加硫した加硫物について、
JIS K6251-2004に準拠して100%モジュラスを、JIS K6253に準
拠して室温条件下での硬さを測定
ここで、硬さは45~60であることが好ましい
対帆布接着性:通常加硫(150℃、30分間)した加硫物について、ポリエス
テル帆布に対する剥離力(JIS K6256-1:2006「布との剥離
強さ」準拠)およびゴム付き(剥離試験後、帆布表面に付着
しているゴムを目視にて確認;剥離による破壊がコートゴ
ム層の全面で起こっている場合はゴム付きが100%となり
、接着が最も良好となる)を測定
ここで、剥離力6.0N/mm以上でゴム付き60%以上のものが
、コンベヤベルト用コートゴムとしての耐久性にすぐれて
いるといえる
カレンダー加工性(Vm):未加硫ゴムJIS K6300-1:2013に準拠してムーニー
スコーチを測定し、ビス最小値を計測
ここで、ビス最小値が20~40であることが好まし
い
tanδ(20℃):通常加硫(150℃、30分間)した加硫物について、粘弾性ス
ペクトロメータ(東洋精機製作所社製)により20℃での
tanδを測定
なお、tanδの測定は、試験片を10%伸張させ、振幅±2%
の振動を振動数20Hzで与えて行った
ここで、tanδは0.15以下であることがコンベヤベルト走
行時のたわみによるエネルギーロスを低減でき、省電力性
に優れているといえる
表1
測定項目 実1 実2 実3 実4 実5 実6
常態物性
100%モジュラス(MPa) 1.8 1.9 1.8 2.1 1.6 2.1
硬さ 52 51 51 54 50 54
対帆布接着性
剥離力 (N/mm) 7.8 7.5 8.2 7.9 7.3 8.9
ゴム付き (%) 80 65 65 70 60 90
Vm (point) 25.3 31.4 28.9 30.9 27.7 28.3
tanδ(20℃) 0.090 0.117 0.099 0.121 0.088 0.148
実施例3において、GPFカーボンブラック量が10.00質量部に変更された。
実施例3において、GPFカーボンブラック量が80.00質量部に変更された。
実施例3において、炭酸カルシウム量が20.00質量部に変更された。
実施例3において、炭酸カルシウム量が105.00質量部に変更された。
実施例3において、天然ゴム量が39.77質量部に、ブタジエンゴム量が27.07質量部に、油展SBR量が45.60質量部(SBRとして33.16質量部、オイル分として12.44質量部)に、アロマオイル量が30.00質量部(オイル分合計量42.44質量部)にそれぞれ変更され、GPFカーボンブラックの代わりにFEFカーボンブラックが63.0質量部用いられた。
実施例3において、油展SBR量が103.75質量部(SBRとして75.46質量部、オイル分として28.29質量部)に変更され、天然ゴムおよびアロマオイルが用いられなかった。
実施例6において、天然ゴム量が66.84質量部に、油展SBR量が45.60質量部(SBRとして33.16質量部、オイル分として12.44質量部<オイル分合計量32.44質量部>)に変更された。
ブタジエンゴムが用いられなかった実施例2において、天然ゴム量が25.00質量部に、油展SBR量が64.93質量部(SBRとして47.22質量部、オイル分として17.71質量部)に、GPFカーボンブラック量が10.00質量部に、炭酸カルシウム量が80.00質量部に、アロマオイル量が3.00質量部にそれぞれ変更され、さらにタイヤ再生ゴムA級(村岡ゴム工業製品タイヤリク紫線)が55.56質量部(ゴム分27.78質量部、カーボン分16.67質量部<カーボン分合計量26.67質量部>、オイル分11.11質量部<オイル分合計量31.82質量部>)が用いられた。
ブタジエンゴムが用いられなかった実施例2において、天然ゴム量が30.00質量部に、油展SBR量が74.20質量部(SBRとして53.97質量部、オイル分として20.23質量部)に、GPFカーボンブラック量が60.00質量部に、炭酸カルシウム量が61.00質量部に、アロマオイル量が28.00質量部にそれぞれ変更され、さらにタイヤ再生ゴムA級(タイヤリク紫線)が32.00質量部(ゴム分16.00質量部、カーボン分9.60質量部<カーボン分合計量69.60質量部>、オイル分6.40質量部<オイル分合計量54.63質量部>)が用いられた。
(1) カーボンブラック量が過小の比較例1にあっては、ゴム付きが悪い
。
(2) カーボンブラック量が過剰の比較例2にあっては、エネルギーロス
が大きい。
(3) 炭酸カルシウム量が過小の比較例3にあっては、ゴム付きが悪い。
(4) 炭酸カルシウム量が過剰の比較例4にあっては、剥離力が低く、硬
さも大きい。
(5) オイル量が過剰の比較例5にあっては、エネルギーロスが大きい。
(6) 天然ゴムを用いない比較例6にあっては、ゴム付きが悪い。
(7) 天然ゴムブレンド割合が過剰の比較例7にあっては、ゴム付きが悪
く、エネルギーロスも大きい。
(8) 汎用コートである比較例8にあっては、エンドレス時の作業性は改
善されるが、剥離力が小さい。
(9) 汎用コートである比較例9にあっては、エネルギーロスが大きい。
実施例3で調製されたコンベヤベルト用コートゴム組成物について、通常加硫物(150℃で30分間加硫)について諸特性を測定すると共に、過加硫物(150℃で140分間加硫)について対帆布接着性(ポリエステル帆布に対する剥離力およびゴム付き)を測定した。
実施例7において、GPFカーボンブラック量を32質量部に、炭酸カルシウム量を25質量部にそれぞれ変更し、さらにシリカ(東ソー・シリカ社製品ニップシールAQ)10質量部を配合し、通常加硫物および過加硫物について同様の測定を行った。
実施例8において、GPFカーボンブラック量を29質量部に、炭酸カルシウム量を20質量部に、シリカ量を15質量部にそれぞれ変更し、通常加硫物および過加硫物について同様の測定を行った。
実施例8において、GPFカーボンブラック量を17質量部に、シリカ量を30質量部にそれぞれ変更し、通常加硫物および過加硫物について同様の測定を行った。
実施例3で調製されたコンベヤベルト用コートゴム組成物中に、さらに
接着系配合剤I 2質量部
(INDSPEC Chemical Co.製品 PENACOLITE RESIN B-18-S)
接着系配合剤II (Allnex社製品CYREZ964) 2 〃
が配合され、通常加硫物および過加硫物について同様の測定を行った。
(1) 実施例7にあっては、過加硫物のゴム付きが60%ぎりぎりである。
(2) シリカ10質量部が配合された実施例8では、過加硫物のゴム付きが
大きく改善されている。
(3) 炭酸カルシウム20質量部、シリカ15質量部がそれぞれ配合された実
施例9では、過加硫物のゴム付きが大きく改善されている。
(4) シリカ30質量部が配合された比較例10では、ビス最小値が高く、
カレンダー作業性が悪化するばかりではなく、tanδ(20℃)の値が
高く、エネルギーロスが大きい。
(5) 接着系配合剤の配合で、過加硫物の対帆布接着性は改善されるが、
通常加硫物の対帆布接着性(剥離力)が低下する。
Claims (8)
- 天然ゴムとブタジエンゴムおよびSBRの少なくとも一種とのブレンドゴム100質量部当り窒素吸着比表面積50m2/g以下のカーボンブラック15~75質量部、炭酸カルシウム25~100質量部およびオイル40質量部以下を配合してなるコンベヤベルト用コートゴム組成物。
- カーボンブラック量が10~65質量部に、炭酸カルシウム量が20~100質量部にそれぞれ変更され、さらにシリカを5~20質量部配合した請求項1記載のコンベヤベルト用コートゴム組成物。
- 天然ゴム15~65質量%およびブタジエンゴムまたはSBR 85~35質量%よりなるブレンドゴムが用いられた請求項1または2記載のコンベヤベルト用コートゴム組成物。
- オイルが10~35質量部用いられた請求項1または2記載のコンベヤベルト用コートゴム組成物。
- コンベヤベルトのカバーゴムと帆布との間および/または帆布相互間のコートゴム形成材料として用いられる請求項1または2記載のコンベヤベルト用コートゴム組成物。
- 請求項5記載のコンベヤベルト用コートゴム組成物が、上面カバーゴム層、シート状補強層および下面カバーゴム層からなるコンベヤベルトにおいて、該コートゴム組成物を帆布の両面に圧着させてシート状補強層を形成させる際の補強層コートゴム形成材料として用いられたコンベヤベルト。
- 対帆布接着性を示す剥離力(JIS K6256-1準拠)が6N/mm以上である請求項6記載のコンベヤベルト。
- ベルト本体をその端末部同士で接合させたエンドレスベルトとして用いられる請求項6記載のコンベヤベルト。
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Cited By (7)
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WO2016208100A1 (ja) * | 2015-06-22 | 2016-12-29 | 株式会社ブリヂストン | ゴム組成物、積層体、及びコンベアベルト |
JP2017088383A (ja) * | 2015-11-16 | 2017-05-25 | バンドー化学株式会社 | 平ベルト |
WO2017150643A1 (ja) * | 2016-03-04 | 2017-09-08 | 株式会社ブリヂストン | ゴム組成物、積層体、及びコンベアベルト |
WO2017150719A1 (ja) * | 2016-03-04 | 2017-09-08 | 株式会社ブリヂストン | ゴム組成物、積層体、及びコンベアベルト |
JP2017222756A (ja) * | 2016-06-14 | 2017-12-21 | 株式会社ブリヂストン | ゴム組成物、積層体、及びコンベアベルト |
KR101900663B1 (ko) | 2017-04-17 | 2018-09-20 | 동일고무벨트 주식회사 | 천연고무와 네오디뮴 부타디엔 고무를 포함하는 고무 조성물 및 이를 이용하여 제조된 난연 에너지 세이빙 컨베이어 벨트 |
CN108699295A (zh) * | 2016-03-04 | 2018-10-23 | 株式会社普利司通 | 橡胶组合物、层叠体和输送带 |
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CN108699295A (zh) * | 2016-03-04 | 2018-10-23 | 株式会社普利司通 | 橡胶组合物、层叠体和输送带 |
CN108699294A (zh) * | 2016-03-04 | 2018-10-23 | 株式会社普利司通 | 橡胶组合物、层叠体和输送带 |
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KR101900663B1 (ko) | 2017-04-17 | 2018-09-20 | 동일고무벨트 주식회사 | 천연고무와 네오디뮴 부타디엔 고무를 포함하는 고무 조성물 및 이를 이용하여 제조된 난연 에너지 세이빙 컨베이어 벨트 |
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JP5999267B2 (ja) | 2016-09-28 |
DE112015001986T5 (de) | 2017-01-12 |
US20170043954A1 (en) | 2017-02-16 |
CN106459498B (zh) | 2018-08-21 |
US10011428B2 (en) | 2018-07-03 |
CN106459498A (zh) | 2017-02-22 |
JPWO2015163168A1 (ja) | 2017-04-13 |
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