WO2016021448A1 - コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物 - Google Patents

コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物 Download PDF

Info

Publication number
WO2016021448A1
WO2016021448A1 PCT/JP2015/071417 JP2015071417W WO2016021448A1 WO 2016021448 A1 WO2016021448 A1 WO 2016021448A1 JP 2015071417 W JP2015071417 W JP 2015071417W WO 2016021448 A1 WO2016021448 A1 WO 2016021448A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling agent
silane coupling
conveyor belt
rubber
rubber composition
Prior art date
Application number
PCT/JP2015/071417
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
大樹 土屋
聡一郎 中根
Original Assignee
バンドー化学株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by バンドー化学株式会社 filed Critical バンドー化学株式会社
Priority to CN201580042181.7A priority Critical patent/CN106573729B/zh
Priority to JP2016540165A priority patent/JP6254704B2/ja
Publication of WO2016021448A1 publication Critical patent/WO2016021448A1/ja

Links

Images

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
    • 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
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/548—Silicon-containing compounds containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • 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
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene

Definitions

  • the present invention relates to a conveyor belt, a method for manufacturing a conveyor belt, and a rubber composition.
  • conveyor belts which are the main components of belt conveyors widely used as conveying devices for articles and materials, are commercially available in various shapes and materials, and these are used properly according to the application. It has been.
  • a rubber conveyor belt is used.
  • This rubber conveyor belt has a core at the center in the thickness direction, and the core is mounted on both the front and back sides. Those provided with a cover rubber layer covering from a wide range are widely used.
  • a rubber composition constituting the cover rubber layer of this conveyor belt a rubber composition having a base rubber made of diene rubber such as natural rubber or polybutadiene rubber is known because of its excellent strength and wear resistance (see below). (See Patent Documents 1 and 2).
  • a belt conveyor is usually provided with a conveyor belt in an endless state.
  • This type of belt conveyor includes a driving pulley and a driven pulley for driving the conveyor belt over the belt.
  • the belt conveyor as described above usually includes a plurality of support rollers for supporting the conveyor belt from the back side between the driving pulley and the driven pulley.
  • the conveyor belt is not only greatly bent by the driving pulley and the driven pulley during operation, but also on the back side (non-conveying side) when passing over the support roller arranged between the driving pulley and the driven pulley. Deformation such as slight bending, stretching, and compression occurs.
  • the cover rubber on the back side that comes into contact with the support roller has a relatively high elastic modulus and is formed of a rubber composition having a low loss coefficient (Tan ⁇ ) in dynamic viscoelasticity. It is preferable from the viewpoint of suppressing energy loss when received. That is, in order to make the conveyor belt exhibit energy saving, it is effective to form the back side cover rubber layer with a rubber composition having at least a relatively high elastic modulus of the back side cover rubber layer and a low loss coefficient. is there.
  • the loss coefficient (Tan ⁇ ) of the cover rubber when the loss coefficient (Tan ⁇ ) of the cover rubber is reduced, energy loss when passing over the support roller is reduced, and power consumption when driving the conveyor belt is reduced.
  • the durability of the cover rubber such as tear resistance and wear resistance, tends to be low.
  • the conventional conveyor belt has a problem that energy saving and durability cannot be achieved at the same time.
  • the present invention has been made paying attention to such points, and provides a rubber composition having a low loss factor while maintaining basic physical properties such as tensile strength and tear strength, and thus, energy saving and durability. It is an object to provide a conveyor belt having a good balance of performance.
  • the present invention is a conveyor belt provided with a front side cover rubber layer and a back side cover rubber layer as a cover rubber layer extending along the longitudinal direction of the belt, and at least the back side cover
  • the rubber composition constituting the rubber layer contains a diene rubber, carbon black, silica, and a silane coupling agent, and a sulfide silane coupling agent and an amino silane coupling agent as the silane coupling agent.
  • Conveyor belt including is provided.
  • this invention is a conveyor belt manufacturing method which produces the conveyor belt provided with the surface side cover rubber layer and the back side cover rubber layer as a cover rubber layer extended along a belt longitudinal direction in order to solve the said subject.
  • a rubber composition comprising a diene rubber, carbon black, silica, and a silane coupling agent, and a sulfide silane coupling agent and an amino silane coupling agent as the silane coupling agent is prepared.
  • Conveyor belt for carrying out a first step, a second step of forming at least the back side cover rubber layer with the rubber composition produced in the first step among the front side cover rubber layer and the back side cover rubber layer A manufacturing method is provided.
  • the present invention includes a diene rubber, carbon black, silica, and a silane coupling agent in order to solve the above-mentioned problems, and as the silane coupling agent, a sulfide silane coupling agent and an amino silane.
  • a rubber composition comprising a coupling agent is provided.
  • a rubber composition having a low loss factor can be provided while maintaining basic physical properties such as tensile strength and tear strength. Therefore, according to the present invention, a conveyor belt excellent in energy saving and durability can be provided.
  • FIG. 2 is a cross-sectional view taken along the line II of FIG. 1 showing a schematic cross-sectional structure of the conveyor belt of one embodiment.
  • FIG. 4 is a cross-sectional view taken along line II-II in FIG. 3.
  • FIG. 1 is a diagram schematically showing a method of using a belt conveyor provided with the conveyor belt of the present embodiment
  • FIG. 2 is a cross-sectional structure taken along a line II shown in FIG. It is arrow sectional drawing which showed schematically.
  • FIG. 1 shows a state of the belt conveyor 1 in which the conveyor belt 10 of the present embodiment formed in an endless shape is arranged so as to have a constant upward gradient from the right side to the left side when viewed from the front in FIG. .
  • FIG. 1 shows a state in which the transported object A is transported as viewed from the side in the transport direction.
  • the conveyor belt 10 is stretched between pulleys 20 arranged on one end side (loading side) and the other end side (unloading side) in the longitudinal direction of the transport path.
  • the unloading pulley 20 is a driving pulley 21 connected to a driving source.
  • the pulley 20 arranged on the stacking side is a driven pulley 22 that rotates together with the endless conveyor belt 10 circulated by the drive pulley 21.
  • support rollers 30 are arranged at a plurality of locations between the drive pulley 21 and the driven pulley 22.
  • the belt conveyor 1 of the present embodiment is provided with a plurality of forward path side support rollers 30a that support the conveyor belt 10 from the back surface side in a transport path (forward path) from the stacking side to the unloading side.
  • the belt conveyor 1 includes a plurality of return-side support rollers 30b that come into contact with the surface of the conveyor belt 10 facing downward in a path (return path) from the unloading side to the loading side. ing.
  • the return path side support roller 30b supports the conveyor belt by bringing the outer peripheral surface into contact with the surface of the conveyor belt 10.
  • the driving pulley 21, the driven pulley 22, and the plurality of forward path side support rollers 30a are arranged with their rotation axes arranged in parallel to each other so that the conveyor belt 10 in the forward path can be supported at a substantially constant inclination.
  • the plurality of the return path side support rollers 30b are arranged in parallel with each other so that the conveyor belt 10 on the return path can be supported at a substantially constant inclination, and the vertical position of the upper end portion is lowered to the right in FIG. It is provided in the belt conveyor 1 so as to be.
  • the conveyor belt 10 in this embodiment is formed in the shape of a flat belt which is not provided with a horizontal beam crossing in the belt width direction and an ear beam standing along both side edges of the belt.
  • the conveyor belt 10 in the present embodiment has a cover rubber 11 (hereinafter referred to as “surface side cover rubber 11a”) that forms the surface side (outer peripheral side) of the conveyor belt 10 on which the conveyed product A is placed.
  • a cover rubber 11 constituting a back surface opposite to the surface on which the conveyed product A is placed hereinafter also referred to as “back surface cover rubber 11b”).
  • a core body layer 12 is formed inside the two layers of cover rubber 11.
  • the core body layer 12 is formed by embedding a core canvas for imparting a tensile strength to the conveyor belt inside the cover rubber 11 of two layers. That is, the front surface side cover rubber 11a and the back surface side cover rubber 11b form a rubber layer extending along the longitudinal direction of the belt, and are formed to have a substantially constant thickness in the longitudinal direction of the belt.
  • the conveyor belt 10 when the conveyed product A is positioned between the forward path side support rollers 30a, the conveyor belt 10 is bent downward due to the weight of the conveyed product A during operation. Become. That is, in a situation where the weight of the conveyed product A is not supported by the forward path side support roller 30a, a tension corresponding to the weight of the conveyed product A is applied to the conveyor belt 10.
  • the conveyor belt 10 is lifted as the conveyed product A approaches the forward path support roller 30a, and after the conveyed object A passes the forward path support roller 30a, the forward path side. As the distance from the support roller 30a increases, the conveyor belt 10 is bent downward again.
  • the conveyor belt 10 according to the present embodiment undergoes multiple bendings in the outward path.
  • the belt conveyor 1 of the present embodiment has a plurality of forward path support rollers 30 a arranged in the belt width direction at locations where the conveyor belt 10 is supported by the forward path support rollers 30 a.
  • the belt conveyor 1 of this embodiment makes the state which lifted the width direction both ends of the conveyor belt 10 rather than the center part with these some outward path side support rollers 30a, made the conveyor belt 10 into a bowl shape, and the conveyed product A became The falling from the side of the conveyor belt 10 is prevented.
  • the conveyor belt 10 of the present embodiment is bent into a bowl shape after passing through the driven pulley 22 in a flat state, and returned to a flat state before being wound around the drive pulley 21. Further, the conveyor belt 10 is greatly bent by these when passing through the driving pulley 21 and the driven pulley 22. Furthermore, the conveyor belt 10 of the present embodiment applies a compressive stress or the like by the forward support roller 30a and the transported object A due to the mass of the transported object A when the transported object A passes over the forward support roller 30a. It is done.
  • the back side cover rubber 11b out of the front side cover rubber 11a and the back side cover rubber 11b has a relatively high elastic modulus and a cycle of “elastic deformation-restoration”. It is preferable that hysteresis loss is small.
  • the back-side cover rubber 11b is preferably composed of a rubber composition having a low dynamic loss factor (Tan ⁇ ).
  • the conveyor belt of this embodiment can form the said surface side cover rubber
  • the front side cover rubber 11a and the back side cover rubber 11b do not need to be formed of the same rubber composition, and may be formed of different rubber compositions.
  • the rubber composition for conveyor belts of this embodiment used for forming the back side cover rubber 11b includes components such as a base rubber, a filler, and an additive. Specifically, a diene rubber, carbon black, Silica and a silane coupling agent are included. Further, the rubber composition of the present embodiment includes a sulfide-based silane coupling agent and an amino-based silane coupling agent as a silane coupling agent.
  • the rubber composition preferably contains natural rubber and a diene rubber other than natural rubber as a rubber component. From the viewpoint of reducing the loss coefficient (Tan ⁇ ) at low temperatures of the rubber composition, polybutadiene other than natural rubber is used. It preferably contains rubber or styrene-butadiene rubber.
  • the rubber composition has a functional group capable of binding to a filler (filler) in the molecule as the polybutadiene rubber or the styrene-butadiene rubber, particularly from the viewpoint of achieving both a loss factor (Tan ⁇ ) and tear strength. It is preferable to contain a modified product prepared at the end of the main chain.
  • the rubber composition contains natural rubber at a ratio of 50 mass% to 80 mass% in the rubber component. Therefore, when the rubber composition contains a modified product and / or a non-modified product of polybutadiene rubber or styrene-butadiene rubber, the total of all polybutadiene rubbers and all styrene-butadiene rubbers is 20% by mass in the rubber component. The content is preferably 50% by mass or less.
  • the rubber composition may contain a filler other than the carbon black and the silica.
  • the filler other than the carbon black and the silica include talc, clay, calcium carbonate, and aluminum hydroxide. Can be mentioned.
  • the filler contained in the rubber composition is preferably 80% by mass or more of carbon black and silica, more preferably 90% by mass or more of carbon black and silica, and 95% by mass or more of carbon. Particularly preferred are black and silica.
  • the carbon black is an effective component for exerting strength against the cover rubber
  • the carbon black tends to form an agglomerate by itself in the cover rubber.
  • This agglomerate collapses when a large deformation occurs in the cover rubber, and the shear elastic modulus decreases, which may increase the hysteresis loss of the cover rubber.
  • the rubber composition contains silica, which generally has a tendency to be inferior to carbon black in terms of reinforcing effect, but can make it difficult to form agglomerates with a silane coupling agent or the like. ing.
  • the content of silica contained in the rubber composition is preferably 5 to 60 parts by mass and more preferably 10 to 50 parts by mass with respect to 100 parts by mass of the diene rubber. Moreover, it is preferable that the ratio of the silica to the sum total of carbon black and a silica is 25 to 75 mass%.
  • carbon black for reinforcing rubber those classified as HAF, FEF and the like in ASTM D 1765 are widely used.
  • the rubber composition has a low loss factor. Therefore, it is preferable to employ carbon black having a relatively large particle size classified as GPF or SRF in the same standard. More specifically, in the rubber composition of the present embodiment, 80% by mass or more of the carbon black contained is preferably GPF or SRF, and more preferably 90% by mass or more is GPF or SRF. 95% by mass or more is particularly preferably GPF or SRF.
  • the silica in the present embodiment preferably has a particle size of a certain size or more, like carbon black.
  • the silica is preferably produced by a wet method rather than the one produced by a dry method, and among the wet methods, one produced by a sedimentation method is more preferred than that produced by a gel method.
  • the silica contained in the rubber composition of the present embodiment is preferably one in which primary particles having a size of 10 nm to 50 nm are aggregated to form secondary particles, and an average of 1 ⁇ m to 40 ⁇ m. What has a particle diameter is preferable.
  • silica having a BET specific surface area of 20 m 2 / g to 400 m 2 / g is preferable.
  • the rubber composition of this embodiment contains an amino-based silane coupling agent and a sulfide-based silane coupling agent for the purpose of improving the dispersibility of silica in the rubber composition.
  • the amino silane coupling agent and the sulfide silane coupling agent do not need to be contained alone in the rubber composition, and two or more of them may be contained in the rubber composition.
  • amino-based silane coupling agent examples include 3-aminopropyltrimethoxysilane ( ⁇ -aminopropyltrimethoxysilane), N-3- (4- (3-aminopropoxy) butoxy) propyl-3-aminopropyl Trimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane (N- ⁇ (aminoethyl) ⁇ -aminopropyltri Methoxysilane), N-2- (aminoethyl) -3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine and its partial hydrolyzate, N-phenyl -3-aminopropyltrimethoxysilane), N-
  • the amino silane coupling agent contained in the rubber composition of this embodiment is preferably 3-aminopropyltrimethoxysilane.
  • the rubber composition of the present embodiment prevents the influence of the addition of the amino-based silane coupling agent from being excessively manifested in the viscoelasticity of the rubber composition, and improves the work such as rubber kneading.
  • the alkylamine has an alkyl group having 6 to 20 carbon atoms, and is preferably either a monoalkylamine having one alkyl group or a dialkylamine having two alkyl groups. .
  • the alkylamine is preferably a monoalkylamine such as octylamine or dodecylamine.
  • the sulfide silane coupling agent examples include a monosulfide silane coupling agent and a polysulfide silane coupling agent.
  • a polysulfide-based silane coupling agent such as bis (3-triethoxysilylpropyl) tetrasulfide is preferable.
  • the amino silane coupling agent and the alkylamine are effective components for improving the hardness of the rubber composition. Therefore, the compound containing all the components contained in the rubber composition contains the amino-based silane coupling agent and the alkylamine even when an aggregate formed by the silica or the carbon black is formed during kneading. Shear force is easily applied to the agglomerates. That is, the rubber composition contains the amino-based silane coupling agent and the alkylamine, thereby reducing the abundance of aggregates due to the silica and the carbon black.
  • the content of the amino silane coupling agent with respect to 100 parts by mass of the silica is preferably 0.5 parts by mass or more, more preferably 1 part by mass or more, and 3 parts by mass or more. It is particularly preferred.
  • the content of the amino silane coupling agent with respect to 100 parts by mass of silica is preferably 10 parts by mass or less, and more preferably 8 parts by mass or less.
  • the content of the alkylamine with respect to 100 parts by mass of the silica is preferably 1 part by mass or more, and more preferably 1.5 parts by mass or more.
  • the content of the alkylamine with respect to 100 parts by mass of the silica is preferably 10 parts by mass or less, and more preferably 7 parts by mass or less.
  • the content of the amino silane coupling agent with respect to 100 parts by mass of silica is “Xa (parts by mass)”, and the content of the alkylamine with respect to 100 parts by mass of silica Is preferably “Xb (parts by mass)”, it is preferable to satisfy all of the following relational expressions (1) to (3).
  • Xa parts by mass
  • Xb parts by mass
  • the content of the sulfide-based silane coupling agent with respect to 100 parts by mass of the silica is preferably 1 part by mass or more and 20 parts by mass or less, and is 5 parts by mass or more and 15 parts by mass or less. It is preferable.
  • silane coupling agents are effective for imparting affinity between rubber components such as natural rubber and silica particles.
  • silica is coupled with a sulfide-based silane coupling agent after being coupled with an amino-based silane coupling agent. Is preferably applied.
  • the coupling treatment with the sulfide-based silane coupling agent is performed after the coupling treatment with the amino-based silane coupling agent.
  • the coupling treatment with the amino silane coupling agent is preferably performed prior to the coupling treatment with the sulfide silane coupling agent.
  • the agglomerates covered with the coupling agent are formed in common, but it is considered that the agglomerates are easily crushed by being sheared by kneading.
  • silica that has been crushed into individual particles having at least a part of the surface subjected to coupling treatment is usually subjected to coupling treatment with a sulfide-based silane coupling agent, thereby suppressing reaggregation, Dispersibility becomes even better.
  • the rubber composition of this embodiment can contain additives other than the silane coupling agent.
  • the additive include vulcanizing agents such as sulfur and organic peroxides; aldehyde / ammonia compounds, guanidine compounds, thiourea compounds, thiazole compounds, sulfenamide compounds, thiuram compounds, dithiocarbamates Vulcanization accelerators such as organic compounds; vulcanization retarders such as organic acids, nitroso compounds, halides, 2-mercaptobenzimidazole, N-cyclohexylthiophthalimide; amino / ketone compounds, aromatic amine compounds, monophenols Anti-aging agents such as compounds, polyphenol compounds and benzimidazole compounds; processing aids such as fatty acid ester compounds; flame retardants and pigments.
  • vulcanizing agents such as sulfur and organic peroxides
  • aldehyde / ammonia compounds such as guanidine compounds, thiourea compounds, thiazole compounds, sul
  • the conveyor belt of the present embodiment is not particularly limited with respect to the core for forming the core body layer 12, and a conveyor belt used for a general conveyor belt can also be employed in this embodiment.
  • a canvas or the like is exemplified as the core body, but the core body does not have to be a canvas and may be a steel cord or the like.
  • the manufacturing method of the conveyor belt of this embodiment is not particularly limited, and can be manufactured in the same manner as a general conveyor belt.
  • the method for producing a conveyor belt according to the present embodiment includes a cover rubber layer extending along the belt longitudinal direction, and the front rubber cover layer and the rear cover rubber layer as the cover rubber layer. And a second step of forming at least the back side cover rubber layer of the front side cover rubber layer and the back side cover rubber layer with the rubber composition produced in the first step.
  • the method of implementing is mentioned.
  • the first step includes a diene rubber, carbon black, silica, and a silane coupling agent.
  • the rubber includes a sulfide silane coupling agent and an amino silane coupling agent as the silane coupling agent.
  • the composition may be prepared by a general method.
  • the rubber composition can be produced, for example, by kneading a compound containing all components using a Banbury mixer, a kneader mixer, a roll, or the like.
  • the conveyor belt is manufactured by forming an unvulcanized sheet for a cover rubber by molding a rubber composition into a sheet shape using a calendar or the like, and vulcanizing the unvulcanized sheet and canvas integrally. be able to.
  • a rubberized canvas is prepared, and the canvas is sandwiched between unvulcanized sheets for cover rubber, and “unvulcanized sheet for front side cover rubber / canvas / unvulcanized sheet for back side cover rubber”.
  • the above-mentioned conveyor belt can be produced by forming a laminated body laminated in the order of “” and integrating the laminated body while vulcanizing using a vulcanizing press.
  • the silica is subjected to the coupling treatment with the sulfide-based silane coupling agent after the coupling treatment with the amino-based silane coupling agent. Therefore, in the rubber kneading for producing the unvulcanized rubber sheet, silica previously coupled with an amino silane coupling agent is used, and a sulfide silane coupling agent is added during the rubber kneading. Alternatively, the addition of the silane coupling agent is preferably carried out in two steps.
  • the first kneading is performed by kneading the first compound in which one or more components among all the components contained in the rubber composition are insufficient, and the first kneading.
  • Second kneading the second compound containing the kneaded product and the second compound supplemented with the lacking component, the amino compound containing an amino-based silane coupling agent, and The first kneading is performed in a state where the sulfide-based silane coupling agent is deficient in the first compound, and the second compound supplemented with the sulfide-based silane coupling agent is kneaded in the second compounding. It is preferable to prepare a rubber composition.
  • the component is insufficient means not only the case where “the component is included but the proportion thereof is small”, but also the case where “the component is not included”.
  • a sulfide-based silane coupling agent is not substantially contained in the first compound.
  • the silane coupling agent is preferably sufficiently reacted with silica.
  • the kneading of the rubber composition is preferably carried out in a heated state (for example, 100 ° C. or higher) in the sense of reacting silica and the silane coupling agent.
  • a heated state for example, 100 ° C. or higher
  • the double bond of the rubber is excessively cut or the vulcanization proceeds, so that the desired properties are exhibited in the cover rubber. There is a risk that it will be difficult.
  • the kneading of the rubber composition including the vulcanizing agent is preferably performed at a temperature lower than 100 ° C, and preferably performed at a temperature lower than 80 ° C.
  • the first compound containing the amino silane coupling agent without substantially containing the vulcanizing agent or the sulfide silane coupling agent is kneaded at a temperature of 100 ° C. or higher.
  • a step, a step of cooling the kneaded product to a temperature of less than 100 ° C. after the step, a step of adding a sulfide-based silane coupling agent after the step and kneading at a temperature of 100 ° C. or more, and a kneaded product after the step of 100 It is preferable to carry out at least the step of cooling to a temperature of less than 0 ° C. and the step of kneading at a temperature of less than 100 ° C. after containing the vulcanizing agent.
  • the belt conveyor is excellent in energy saving and durability by being provided with the conveyor belt of this embodiment.
  • the conveyor belt 10 is used in the form of a bowl curved in the width direction when transporting the transported object A, The case where bending in the width direction as well as the longitudinal direction is performed at the time of use is illustrated. However, the effect of the present invention is also exhibited in a conveyor belt that is only bent in the longitudinal direction during use. Further, as shown in FIGS. 3 and 4, examples in which the bending of the width direction is larger than that of the conveyor belt shown in FIGS.
  • FIGS. 3 and 4 show a belt conveyor 1 called a pipe conveyor and the use state of the conveyor belt 10 in the belt conveyor 1.
  • the conveyor belt 10 shown in FIGS. 3 and 4 is common to the conveyor belt shown in FIGS. 1 and 2 in that it is endless and is stretched between the drive pulley 21 and the driven pulley 22.
  • the conveyor belt 10 shown in FIGS. 3 and 4 is also common to the conveyor belt shown in FIGS. 1 and 2 in that the conveyor belt 10 is distorted when getting over the forward path side support roller 30a and the backward path side support roller 30b.
  • the conveyor belt 10 shown in FIGS. 3 and 4 is also shown in FIGS. 1 and 2 in that a core layer (not shown) is formed between the front cover rubber 11a and the back cover rubber 11b. Common to the conveyor belt shown.
  • the conveyor belt 10 shown in FIGS. 3 and 4 is used in a state in which the conveyor belt 10 is rolled into a cylindrical shape in a section where the conveyed product A is conveyed. That is, the conveyor belt 10 shown in FIGS. 3 and 4 has both ends in the width direction lifted by the forward-side support rollers 30a after the conveyed product A is placed on the upper surface of the front-side cover rubber 11a on the stacking side. The lifted both end portions are drawn so that the back side faces upward, and the both end portions are overlapped to form a cylindrical shape, and this cylindrical state is maintained until unloading.
  • the belt conveyor 1 shown in FIGS. 3 and 4 is suitable for transporting a transported object A or the like which is easily scattered such as powder, and is large for the conveyor belt 10 when it is formed into a cylindrical shape. Since distortion is added, the effect of the present invention becomes more remarkable. In particular, even if a part of the conveyed product A adheres to the surface of the surface side cover rubber 11a, the conveyor belt 10 is formed into a cylinder by the return side support roller 30b in the return path so that it does not fall on the return path. In the belt conveyor 1 of the shape, the effect of the present invention is particularly remarkable. As described above, the effects of the present invention are exhibited in various conveyor belts other than those shown in FIGS.
  • Such an effect does not occur only when the rubber composition of the present embodiment is used as a cover rubber.
  • energy loss during traveling can be reduced by forming the ear rails with the rubber composition of the present embodiment.
  • the rubber composition for conveyor belts of the present invention can be applied not only to the back cover rubber layer, but also to the front cover rubber layer and the core layer, and is useful for forming other parts of the conveyor belt. It is a thing.
  • the rubber composition of the present embodiment is a compressed rubber layer of a V belt or V ribbed belt that is used by being wound around a pulley with a V groove, a tooth portion of a toothed belt that is used by being wound around a toothed pulley, or the like. It is also useful for the formation of Furthermore, the rubber composition of this embodiment is useful as a material for forming a transmission belt such as a round belt or a flat belt. The rubber composition of the present embodiment is not only useful as a rubber composition for belts such as conveyor belts and transmission belts, but also can be used in various applications that require both energy saving and durability.
  • the rubber composition and conveyor belt of the present invention are not limited to the above examples.
  • silica precipitated silica (trade name: Ultrasil VN3, manufactured by Evonik Degussa Japan), 30 parts by mass, and then an amino silane coupling agent (3-aminopropyltriethoxysilane) (trade name: dynasilane AMEO).
  • Evonik Degussajapa 1.3 parts by mass and 0.7 parts by mass of octylamine (trade name: Farmin 08D manufactured by Kao) were added and reacted at 150 ° C., and then a sulfide-based silane coupling agent (bis (3-tri Ethoxysilylpropyl) tetrasulfide) (trade name: Si69 manufactured by Evonik Degussa Japan) (3 parts by mass) was added and reacted at 140 ° C.
  • a sulfide-based silane coupling agent bis (3-tri Ethoxysilylpropyl) tetrasulfide
  • stearic acid (trade name: bead stearic acid Tsubaki Sanyu Industrial, (processing aid 1)) and three types of zinc oxide (trade name: Zinc Hana 3A, made by Mitsui Mining & Mining, Auxiliary agent 2)), anti-aging agent (trade names: Nocrack 6C, Nocrack 224, Sunnock, and Nocrack AW-N Ouchi Shinsei Chemical), Vulcanization accelerator (Product No .: Noxeller NS-F Ouchi Shinsei Chemical) ), A vulcanization retarder (trade name: MIRAD PVI, manufactured by Ogura Sandine Co., Ltd.), and kneaded with a Banbury mixer.
  • MIRAD PVI manufactured by Ogura Sandine Co., Ltd.
  • the rubber after kneading is made into a sheet shape with a sheet extruder (trade name: TSR Kobe Steel), and then a vulcanizing agent (sulfur) (trade name: Seimi OT Rubber Industrial Materials) is charged in a mill blender. An unvulcanized rubber sheet having a predetermined thickness was obtained.
  • the vulcanized rubber sheet obtained by hot pressing this unvulcanized rubber sheet was evaluated according to the following items.
  • Test piece was a JIS No. 3 dumbbell-shaped test piece with a thickness of 2.0 mm.
  • ⁇ Shear modulus> As a testing machine, “RPA2000” manufactured by Alpha Technologies was used. The test conditions were a frequency of 0.5 Hz and a temperature of 40 ° C., the shear modulus at shear strain of 0.28% and 60% was measured, respectively, and the retention rate (%) of the shear modulus was obtained from the ratio thereof.
  • the test piece was produced by punching a disk having a diameter of 30 mm from a sheet having a thickness of 12.5 mm in accordance with JISK6300-2 (2001) “How to obtain vulcanization characteristics using a vibration vulcanization tester”.
  • ⁇ Test of loss factor (tan ⁇ )> As a testing machine, “FT-RheoSpectra DVE-V4” manufactured by Rheology Co., Ltd. was used. The test conditions were a frequency of 10 Hz, a temperature of 0 ° C., 20 ° C., a sample thickness of 1.0 mm, a sample length of 8.00 mm, and a sample width of 3 mm. The measured value of the loss factor tan ⁇ was measured by applying a distortion of amplitude ⁇ 2% in a state where the loss factor tan ⁇ was extended by 5% with respect to the sample length.
  • Example 5 A rubber composition was prepared in the same manner as in Example 1 except that the rubber composition was prepared by the formulation shown in Table 1, and evaluation of the vulcanized rubber sheet was performed in the same manner as in Example 1.
  • silica Product No .: Cupsil 8113 Evonik Degussa
  • silica that was previously surface-treated on silica (Product No .: Ultrasil VN3) with a sulfide-based silane coupling agent (Product No .: Si69) manufactured by Evonik Degussa Japan.
  • a rubber composition was prepared by adding a sulfide-based silane coupling agent at the timing of adding the amino-based silane coupling agent in Example 1.
  • a rubber composition was prepared using styrene-butadiene rubber (SBR) (product number: NS616 manufactured by Nippon Zeon Co., Ltd.) instead of polybutadiene rubber (BR).
  • silica precipitated silica
  • product number: Ultrasil VN3 manufactured by Evonik Degussa Japan 30 parts by mass, and then an amino-based silane coupling agent (3-aminopropyltriethoxysilane) (trade name: dynasilane AMEO Evonik Degussa) Made in Japan
  • an amino-based silane coupling agent 3-aminopropyltriethoxysilane
  • dynasilane AMEO Evonik Degussa amino-based silane coupling agent
  • 3-aminopropyltriethoxysilane trade name: dynasilane AMEO Evonik Degussa
  • a sulfide-based silane coupling agent bis (3-triethoxysilylpropyl) tetrasulfide
  • stearic acid (trade name: bead stearic acid made by Tsubaki Sanyu Industrial, (processing aid 1)) and three types of zinc oxide (product number: Zinc Hua 3A, made by Mitsui Mining & Mining, Agent 2)), anti-aging agent (trade names: Nocrack 6C, Nocrack 224, Sunnock, and Nocrack AW-N Ouchi Shinsei Chemical), vulcanization accelerator (trade name: Noxeller NS-F Ouchi Shinsei Chemical) ), A vulcanization retarder (trade name: MIRAD PVI, manufactured by Ogura Sandine Co., Ltd.), and kneaded with a Banbury mixer.
  • zinc oxide product number: Zinc Hua 3A, made by Mitsui Mining & Mining, Agent 2
  • anti-aging agent trade names: Nocrack 6C, Nocrack 224, Sunnock, and Nocrack AW-N Ouchi Shinsei Chemical
  • vulcanization accelerator (trade name: Noxeller
  • the rubber after kneading is made into a sheet shape with a sheet extruder (trade name: TSR Kobe Steel), and then a vulcanizing agent (sulfur) (trade name: Seimi OT Rubber Industrial Materials) is charged in a mill blender. An unvulcanized rubber sheet having a predetermined thickness was obtained.
  • the shear modulus retention rate (60% / 0.3%) and 20 ° C. in the same manner as in “Evaluation 1”.
  • Loss factor (tan ⁇ ) was measured.
  • the value of “shear modulus retention (%)” obtained here is an index representing the dispersibility of the filler. Therefore, the value of “shear modulus retention (%)” of this reference sample was set as “dispersion index (D1)”.
  • the value of “loss factor (tan ⁇ )” obtained here is an index representing energy saving. Therefore, the value of “loss factor (tan ⁇ )” of this reference sample was set as “energy saving index (S1)”.
  • the percentage value [100% ⁇ (T2 / Ty)] obtained by dividing the “rolling time (T2)” of the reference sample by the “rolling time (Ty)” of the comparative sample is “workability during rolling”. It was used as an index for judging. Both indicators were set so that the comparative sample had better workability, and the values were higher as the “kneading time (Tx)” and “rolling time (Ty)” were shorter.
  • the “dispersion index (Dx)” and “energy saving index (Sx)” of the comparative sample are obtained,
  • the percentage value [100% ⁇ (Dx / D1)] obtained by dividing the “dispersion index (Dx)” of this comparative sample by the “dispersion index (D1)” of the reference sample is judged as “filler dispersibility”. It was used as an indicator.
  • the percentage value [100% ⁇ (S1 / Sx)] obtained by dividing the “energy saving index (S1)” of the reference sample by the “energy saving index (Sx)” of the comparative sample is judged as “energy saving”. It was used as an indicator.
  • the “dispersion index” is different from the “energy saving index”, “kneading time”, and “rolling time”, and the higher the value, the better the result. Therefore, only the “dispersion index” is obtained by dividing the result of the comparative sample by the result of the reference sample. In other words, both the “dispersibility of filler” and the “energy saving” index have higher values as good results are obtained as in “workability during kneading” and “workability during rolling”. Set. These results are shown in Table 2.
  • a rubber composition having a low loss factor can be obtained while maintaining basic physical properties such as tensile strength and tear strength, and a conveyor belt excellent in energy saving and durability can be obtained.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Belt Conveyors (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
PCT/JP2015/071417 2014-08-07 2015-07-28 コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物 WO2016021448A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580042181.7A CN106573729B (zh) 2014-08-07 2015-07-28 传送带、传送带的制造方法、以及橡胶组合物
JP2016540165A JP6254704B2 (ja) 2014-08-07 2015-07-28 コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-161050 2014-08-07
JP2014161050 2014-08-07

Publications (1)

Publication Number Publication Date
WO2016021448A1 true WO2016021448A1 (ja) 2016-02-11

Family

ID=55263719

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/071417 WO2016021448A1 (ja) 2014-08-07 2015-07-28 コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物

Country Status (3)

Country Link
JP (1) JP6254704B2 (zh)
CN (1) CN106573729B (zh)
WO (1) WO2016021448A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021059633A (ja) * 2019-10-03 2021-04-15 横浜ゴム株式会社 スチールコード接着用ゴム組成物及びコンベヤベルト

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997035918A2 (fr) * 1996-06-26 1997-10-02 Bridgestone Corporation Compositions de caoutchouc
JPH1067884A (ja) * 1996-06-24 1998-03-10 Goodyear Tire & Rubber Co:The シリカ充填ゴム組成物中のアミノシラン化合物
JP2000143880A (ja) * 1998-11-12 2000-05-26 Goodyear Tire & Rubber Co:The 強化エラストマ―、エラストマ―複合材およびそれらを構成部材として有するタイヤ
JP2001200063A (ja) * 1999-12-24 2001-07-24 Bayer Inc ブチルエラストマーと充填剤との間の向上した化学結合性を有するエラストマーブチルコンパウンド
JP2001527599A (ja) * 1997-05-22 2001-12-25 バイエル・インコーポレーテツド 粒子を疎水性にする方法そしてそれらをポリマーマスターバッチに入れる充填材として用いる使用
JP2006282964A (ja) * 2005-04-05 2006-10-19 Asahi Kasei Chemicals Corp ゴム組成物
JP2007031581A (ja) * 2005-07-27 2007-02-08 Yokohama Rubber Co Ltd:The ゴム組成物
JP2007509226A (ja) * 2003-10-20 2007-04-12 ユニロイヤル ケミカル カンパニー インコーポレイテッド ゴム組成物ならびにタンジェントデルタ値および摩耗指数の低減方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11139523A (ja) * 1997-11-12 1999-05-25 Bridgestone Corp コンベアベルト
US6403693B2 (en) * 1999-06-18 2002-06-11 The Goodyear Tire & Rubber Company Silica reinforced rubber composition and use in tires
WO2006101228A1 (ja) * 2005-03-25 2006-09-28 National University Corporation Kyoto Institute Of Technology ゴム組成物及びその製造方法
JP2006282954A (ja) * 2005-04-05 2006-10-19 Nissan Soap Co Ltd 洗剤粒子の製造方法
JP2007099896A (ja) * 2005-10-04 2007-04-19 Yokohama Rubber Co Ltd:The ゴム組成物
JP4286298B2 (ja) * 2006-07-14 2009-06-24 横浜ゴム株式会社 コンベヤベルト用ゴム組成物およびコンベヤベルト

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1067884A (ja) * 1996-06-24 1998-03-10 Goodyear Tire & Rubber Co:The シリカ充填ゴム組成物中のアミノシラン化合物
WO1997035918A2 (fr) * 1996-06-26 1997-10-02 Bridgestone Corporation Compositions de caoutchouc
JP2001527599A (ja) * 1997-05-22 2001-12-25 バイエル・インコーポレーテツド 粒子を疎水性にする方法そしてそれらをポリマーマスターバッチに入れる充填材として用いる使用
JP2000143880A (ja) * 1998-11-12 2000-05-26 Goodyear Tire & Rubber Co:The 強化エラストマ―、エラストマ―複合材およびそれらを構成部材として有するタイヤ
JP2001200063A (ja) * 1999-12-24 2001-07-24 Bayer Inc ブチルエラストマーと充填剤との間の向上した化学結合性を有するエラストマーブチルコンパウンド
JP2007509226A (ja) * 2003-10-20 2007-04-12 ユニロイヤル ケミカル カンパニー インコーポレイテッド ゴム組成物ならびにタンジェントデルタ値および摩耗指数の低減方法
JP2006282964A (ja) * 2005-04-05 2006-10-19 Asahi Kasei Chemicals Corp ゴム組成物
JP2007031581A (ja) * 2005-07-27 2007-02-08 Yokohama Rubber Co Ltd:The ゴム組成物

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021059633A (ja) * 2019-10-03 2021-04-15 横浜ゴム株式会社 スチールコード接着用ゴム組成物及びコンベヤベルト
JP7381853B2 (ja) 2019-10-03 2023-11-16 横浜ゴム株式会社 スチールコード接着用ゴム組成物及びコンベヤベルト

Also Published As

Publication number Publication date
JPWO2016021448A1 (ja) 2017-05-25
JP6254704B2 (ja) 2017-12-27
CN106573729B (zh) 2019-04-26
CN106573729A (zh) 2017-04-19

Similar Documents

Publication Publication Date Title
WO2008007733A1 (fr) Composition de caoutchouc pour tapis de convoyage et tapis de convoyage
US9850069B2 (en) Rubber composition and conveyor belt using same
DE112011102762B4 (de) Kautschukzusammensetzung und deren Verwendung in Luftreifen
JP5934677B2 (ja) タイヤ用ゴム組成物、及び空気入りタイヤ
JP2010095584A (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
WO2015163168A1 (ja) コンベヤベルト用コートゴム組成物
CN1876702A (zh) 具有天然橡胶和特殊苯乙烯/丁二烯橡胶组成的胎面的轮胎
JP4561046B2 (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
WO2012032896A1 (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
WO2016056219A1 (ja) コンベヤベルト用ゴム組成物、及びコンベヤベルト
CN105330906B (zh) 一种耐冲击抗撕裂钢丝绳芯输送带用覆盖胶及制备方法
JP6254704B2 (ja) コンベヤベルト、コンベヤベルトの製造方法、及び、ゴム組成物
JP2010006859A (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
JP5902935B2 (ja) コンベアベルト用ゴム組成物、コンベアベルト及びベルトコンベア
JPWO2018012325A1 (ja) ゴム組成物、コンベアベルト、及びベルトコンベア
KR20190122153A (ko) 다기능 복합 컨베이어 벨트 및 이의 제조방법
JP2004018752A (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
WO2019044959A1 (ja) ゴム組成物、内周カバーゴム、コンベアベルト及びベルトコンベア
JP5317518B2 (ja) コンベヤベルト
CN107001702B (zh) 防振橡胶用橡胶组合物及防振橡胶
JP2010013262A (ja) コンベヤベルト用ゴム組成物、コンベヤベルトの製造方法およびコンベヤベルト
JP5482071B2 (ja) コンベヤベルト用ゴム組成物およびコンベヤベルト
JP5082571B2 (ja) タイヤトレッド用ゴム組成物
JP2018070813A (ja) 防舷材用ゴム組成物
JP2004010215A (ja) コンベヤベルト

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15830494

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016540165

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15830494

Country of ref document: EP

Kind code of ref document: A1