CN101490159A - Rubber composition for conveyor belt and conveyor belt - Google Patents
Rubber composition for conveyor belt and conveyor belt Download PDFInfo
- Publication number
- CN101490159A CN101490159A CNA2007800267928A CN200780026792A CN101490159A CN 101490159 A CN101490159 A CN 101490159A CN A2007800267928 A CNA2007800267928 A CN A2007800267928A CN 200780026792 A CN200780026792 A CN 200780026792A CN 101490159 A CN101490159 A CN 101490159A
- Authority
- CN
- China
- Prior art keywords
- rubber
- conveying belt
- weight parts
- combination
- rubber combination
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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- 239000005060 rubber Substances 0.000 title claims abstract description 296
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- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 57
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 57
- 229920001194 natural rubber Polymers 0.000 claims abstract description 57
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 49
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Classifications
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- 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
Abstract
Disclosed are a rubber composition for a conveyor belt and a conveyor belt which can maintain basic physical properties such as high rupture strength and high wear resistance and can reduce the power consumption to a satisfactory level. The rubber composition comprises a rubber component comprising natural rubber (NR) and polybutadiene rubber (BR), carbon black, silica, a silane coupling agent and diethylene glycol, wherein the ratio between the amount of natural rubber and the amount of polybutadiene rubber (NR/BR) in the rubber component is 80/20 to 25/75, the content of carbon black is 15 to 35 parts by mass based on 100 parts by mass of the rubber component, the content of silica is 5 to 25 parts by mass based on 100 parts by mass or the rubber component, the content of the silane coupling agent is 0.5 to 3 parts by mass based on 100 parts by mass of the rubber component, and the content of diethylene glycol is 0.5 to 4.5 parts by mass based on 100 parts by mass of the rubber component.
Description
Technical field
[0001] the present invention relates to be used for the rubber combination and the conveying belt of conveying belt.
Background technology
[0002] conveying belt is usually as transporting material.Yet,, exist more large size and the more needs of reinforced belt owing to the increase of transportation volume, the improvement and the other factors of conveying efficiency.Recently, total length occurs and reached thousands of kilometers conveying belt.Thus, equipment cost and energy consumption are also rising, and this has caused the hope of people to the band delivery system of low cost, less energy-consumption.Especially, the character of studying by improving the rubber of making band reduces the cost of conveying belt and the approach of energy consumption.
[0003] for example, patent document 1 disclose " a kind of conveying belt of coiling; it is transmitting between driving wheel and the idle pulley and is being provided in the cargo transfer system, conveying belt be characterised in that as and the loss factor (tan δ) of the character of the band internal surface that comes in contact of carrying roller and dynamic modulus (E ') satisfied respectively 0.04≤tan δ≤0.12 and E ' 〉=20kgf/cm
2"; and " a kind of conveying belt of coiling is also disclosed, it is transmitting between driving wheel and the idle pulley and is being provided in the cargo transfer system, conveying belt is characterised in that, rubber on the belt inner surface comprises, about the polymkeric substance of forming by the polybutadiene rubber of 40 to 100 parts by weight of natural rubber and 60 to 0 weight parts, the carbon black of 20 to 55 weight parts ".
[0004] patent document 2 discloses " in the top or the bottom of core layer at least, have and conveying belt that the band supporting element contact, covering rubber is characterised in that and comprises silicon oxide and silane coupling agent ".
[0005] in addition, the application disclose " rubber combination that is used for conveying belt, the rubber components of wherein per 100 weight parts comprise the carbon black with colloidal property as follows of 30 to 65 weight parts:
1) the highest 80m
2Nitrogen adsorption specific surface area (the N of/g
2SA),
2) the iodine of the highest 70mg/g absorption (IA) and
3) 100cm at least
3The dibutyl phthalate of/100g (DBP) oil absorb and under 10Hz frequency, 2% dynamic strain and 20 ℃ greater than 0.12 and the highest 0.200 loss factor tan δ (referring to patent document 3) ".
[0006] patent document 4 discloses the " rubber compound with improved anti-(reversion) property of reverting, and it comprises as follows: (a) be selected from natural rubber, derived from the rubber of diene monomers and the rubber of its mixture in claim 1; (b) about 0.1 to about 10phr bismaleimide compound with following general formula (I)
(wherein R is about 2 divalent acyclic aliphatic groups to about 16 carbon, the about 5 bivalent cyclic aliphatic groups to about 20 carbon, about 6 divalence aromatic group or the about 7 divalent alkyl aromatic groups to about 24 carbon to about 18 carbon, and wherein divalent group can comprise the heteroatoms that is selected from oxygen, nitrogen and sulphur; X is 0 or from 1 to 3 integer; And Y be hydrogen or-CH
3); (c) two benzothiazole dithio compounds of about 0.1 to about 10phr with following general formula (II)
(R wherein
1Be selected from alkylidene group, ring alkylidene group, arylene group, have the alkyl arylene group of 7 to 25 carbon and have the divalent group of following general formula) with 6 to 18 carbon with 6 to 24 carbon with 1 to 20 carbon.
[0007] patent document 1:JP 11-139523 A
Patent document 2:JP 2004-10215 A
Patent document 3:JP 2004-18752 A
Patent document 4:JP 10-77361 A
Summary of the invention
The problem to be solved in the present invention
[0008] yet, in the situation of patent document 1 described conveying belt, its objective is and reduce tan δ value and cut down the consumption of energy, when tan δ value is too small, breaking tenacity (T
B) and extension at break (E
B) reduce, cause low tear strength and fatigue resistance so sometimes.Therefore, when conveying belt transmits, can cover the surface damage of rubber etc., and this can cause the surface failure of conveying belt, causes unsettled operation.
Conveying belt described in the patent document 2 has high energy waste index, and it is insufficient that this causes energy consumption to reduce.
Inconsistent (for example line tilts and be crooked) of the line of tape running have high energy waste index because be used for the conveying belt of the rubber combination that is used for conveying belt described in the patent document 3, so can make energy consumption less insufficient sometimes.
In addition, found when the amount of natural rubber (NR) surpasses 80 weight parts, to use the band of the compound described in the patent document 4 to have poor abrasion resistance.Also found when natural rubber content is lower than 25 weight parts 25% modulus (M
25) reduce and energy waste index (Δ H) increase, therefore can not realize reducing on the energy consumption.In addition, because the compound described in the patent document 4 comprises silicon oxide and do not comprise silane coupling agent and Diethylene Glycol, so loss factor tan δ and energy waste index Δ H are all very big, this makes that energy consumption is less and can not realize.
[0009] therefore the purpose of this invention is to provide rubber combination and the conveying belt that is used for conveying belt, it can realize the abrasion resistance that the abundant minimizing on the energy consumption keeps for example high breaking tenacity of essential property to become reconciled simultaneously.
The method of dealing with problems
[0010] contriver has carried out deep research to address the above problem.Therefore, they have been found that, the rubber combination of rubber components, carbon black, silicon oxide, silane coupling agent and Diethylene Glycol that the back side is made up of natural rubber with specified proportion (NR) and polybutadiene rubber (BR) or have specific loss factor tan δ and conveying belt that the rubber combination of particular energy loss index (Δ H) constitutes can be realized the abrasion resistance that the abundant minimizing on the energy consumption keeps for example high breaking tenacity of essential property to become reconciled simultaneously.
[0011] therefore, the invention provides following (1) to (15).
(1) is used for the rubber combination of conveying belt, comprise the rubber components of forming by natural rubber (NR) and polybutadiene rubber (BR), carbon black, silicon oxide, silane coupling agent and Diethylene Glycol, wherein in the rubber components weight ratio NR/BR of natural rubber and polybutadiene rubber between 80/20 to 25/75, the rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts, the rubber components silica content of per 100 weight parts is 5 to 25 weight parts, the rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and the rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.
(2) rubber combination that is used for (1) conveying belt also comprises 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, 6-two (Sulfothiorine).
(3) rubber combination that is used for (2) conveying belt, in wherein per 100 parts by weight of rubber components 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, the content of 6-two (Sulfothiorine) is 0.1 to 2 weight part.
(4) be used for (1) rubber combination to (3) arbitrary conveying belt, wherein silicon oxide has 100 to 250m
2Nitrogen adsorption specific surface area (the N of/g
2SA).
(5) be used for (1) rubber combination to (4) arbitrary conveying belt, wherein polybutadiene rubber (BR) is end modified polybutadiene rubber.
[0012] (6) a kind of conveying belt comprises that the top covers rubber layer, enhancement layer and bottom and covers rubber layer, and wherein the back side of bottom covering rubber layer is formed by being used for (1) to (5) arbitrary rubber combination that is used for conveying belt at least.
[0013] (7) are used for the rubber combination of conveying belt, have under 20 ℃, 10% elongation and 0.04 to 0.07 the loss factor tan δ that uses under the 10Hz frequency that ± 2% amplitude strain swing records and by the energy waste index (Δ H) of following formula (1) defined the highest 0.080
ΔH＝(SpGr×tan?δ)/M
25 (1)，
Proportion (g/cm when wherein SpGr is 20 ℃
3), tan δ be under 20 ℃, 10% elongation and under the 10Hz frequency, use the loss factor that ± 2% amplitude strain swing records, and M
25Be the tensile strength (MPa) when 25% elongation.
(8) rubber combination that is used for (7) conveying belt comprises the rubber components of being made up of natural rubber (NR) and polybutadiene rubber (BR).
(9) rubber combination that is used for (7) conveying belt comprises rubber components, carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol be made up of natural rubber (NR) and polybutadiene rubber (BR).
(10) rubber combination that is used for (7) conveying belt, comprise the rubber components of forming by natural rubber (NR) and polybutadiene rubber (BR), carbon black, silicon oxide, silane coupling agent and Diethylene Glycol, wherein in the rubber components weight ratio NR/BR of natural rubber and polybutadiene rubber between 80/20 to 25/75, the rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts, the rubber components silica content of per 100 weight parts is 5 to 25 weight parts, the rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and the rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.
(11) rubber combination that is used for (9) or (10) conveying belt, wherein silicon oxide has 100 to 250m2/g nitrogen adsorption specific surface area (N
2SA).
(12) be used for (8) rubber combination to (11) arbitrary conveying belt, wherein polybutadiene rubber (BR) is end modified polybutadiene rubber.
[0014] (13) are used for (7) rubber combination to (12) arbitrary conveying belt, also comprise 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, 6-two (Sulfothiorine).
(14) rubber combination that is used for (13) conveying belt, the rubber components 1 of wherein per 100 weight parts, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, the content of 6-two (Sulfothiorine) is 0.1 to 2 weight part.
[0015] (15) a kind of conveying belt comprises that the top covers rubber layer, enhancement layer and bottom and covers rubber layer, and wherein the back side of bottom covering rubber layer is formed by the rubber combination that is used for (7) to (14) arbitrary conveying belt at least.
Advantage of the present invention
[0016] as described below, the present invention is useful, because it provides the abundant minimizing that can realize on the energy consumption to keep the conveying belt of the abrasion resistance that for example high breaking tenacity of essential property becomes reconciled simultaneously.
Description of drawings
[0017] Fig. 1 is the schematic cross-section according to the preferred embodiment of first conveying belt of the present invention.Legend
[0018] 1: conveying belt
2: the top covers rubber layer
3: enhancement layer
4: the bottom covers rubber layer
5: the transportation of cargo surface
11,16: skin
12,15: internal layer
Optimum implementation
[0019] describes the present invention below.The rubber combination that is used for conveying belt (hereafter is " first rubber combination that is used for conveying belt of the present invention " sometimes) according to first aspect present invention comprises the rubber components of being made up of natural rubber (NR) and polybutadiene rubber (BR), carbon black, silicon oxide, the rubber combination of silane coupling agent and Diethylene Glycol, wherein in the rubber components weight ratio NR/BR of natural rubber and polybutadiene rubber between 80/20 to 25/75, the rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts, the rubber components silica content of per 100 weight parts is 5 to 25 weight parts, the rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and the rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.Below each composition of first rubber combination that is used for conveying belt of the present invention is described in detail.
[0020]
Rubber components
Rubber components is made up of natural rubber (NR) and polybutadiene rubber (BR).
The weight ratio of natural rubber and polybutadiene rubber (NR/BR) is between 80/20 to 25/75 in the rubber components, preferably 70/30 to 50/50, and more preferably 70/30 to 60/40.
Fall in the aforementioned range by the relative proportion that makes natural rubber and polybutadiene rubber, first rubber combination that is used for conveying belt of the present invention of gained has the abrasion resistance that good breaking tenacity is become reconciled after sulfuration, therefore make it can keep the basic physical properties of conveying belt.Think that this helps the good consistency of natural rubber and polybutadiene rubber, has further improved enhanced propertied.
[0021] be used for first rubber combination of conveying belt of the present invention, the weight-average molecular weight of polybutadiene rubber preferably is 500,000 at least, and more preferably is 550,000 at least.Weight-average molecular weight in this scope can improve breaking tenacity and the tear strength of first rubber combination after sulfuration that is used for conveying belt of the present invention, and causes better abrasion resistance.
[0022] is being used for first rubber combination of conveying belt of the present invention, the polybutadiene rubber that polybutadiene rubber is preferably end modified.
End modified polybutadiene rubber is not made any special restriction.For example, being used for that polybutadiene rubber is carried out end modified method can be to use properties-correcting agent that the end (reactive terminal) of polybutadiene rubber is modified.
The halogenide that the illustrative example of described properties-correcting agent comprises tin is tin tetrachloride and tin tetrabromide, halogenated organo-tin compound for example silicon tetrachloride and chloro triethyl silicane, compound for example N-Methyl pyrrolidone (NMP), lactam compound, urea compounds and the isocyanurate derivative of phenyl isocyanate, amide compound for example that have an isocyanate groups of tributyltin chloride, silicon compound for example for example.
[0023] by using described end modified polybutadiene rubber, all in good range, this makes it can realize the abundant minimizing on the energy consumption to first rubber combination that is used for conveying belt of gained at the described subsequently loss factor tan δ after the sulfuration and energy waste index (Δ H).The contribution that as if this terminal portions that can ascribe modification to done increase crosslinked and sulfuration back cross-linking density.
[0024] can have at least 500,000 weight-average molecular weight as the product that is purchased of end modified polyhutadiene.
Specific examples is Nipol BR1250H (weight-average molecular weight, 570,000 of originating from Zeon Corporation; NMP-modifies).
[0025]
Carbon black
Carbon black is not made any special restriction, although preferably comprise the black carbon black of GPF (versatible furnace).It can also comprise other carbon black of any following demonstration.
[0026] other sooty example comprises HAF (high abrasion stove (High Abrasion Furnace)), SAF (super abrasion stove (Super Abrasion Furnace)), ISAF (in super abrasion stove ((IntermediateSuper Abrasion Furnace)), FEF (pushing stove (Fast Extruding Furnace) fast), SRF (half reinforcement stove (Semi-Reinforcing Furnace)), FT (low-grade fever (Fine Thermal)) and MT (middle heat ((Medium Thermal)).
[0027] can be purchased product as described sooty.
Exemplary GPF black-envelope draw together Asahi #55 (Asahi Carbon Co., Ltd. produce), SeastV (Tokai Carbon Co., Ltd.) and DiablackG (Mitsubishi ChemicalCorporation).Exemplary HAF black-envelope is drawn together Seast 3, and (Tokai Carbon Co. is Ltd.) with Shoblack N339 (Showa Cabot KK).
The example that ISAF is black is Shoblack N220 (Showa Cabot KK), the example that SAF is black is Seast 9 (Tokai Carbon Co., Ltd.), the example that FEF is black is HTC #100 (Shin NikkaCarbon), the example that SRF is black comprises Asahi #50 (Asahi Carbon Co., Ltd.) and Mitsubishi Diablack R (Mitsubishi Chemical Corporation), the example that FT is black comprises Asahi # 15, and (Asahi Carbon Co. is Ltd.) with HTC #20 (Shin Nikka Carbon).
[0028] be used for first rubber combination of conveying belt of the present invention, per 100 parts by weight of rubber components, described sooty content is 15 to 35 weight parts, 20 to 30 weight parts preferably, and more preferably 25 to 30 weight parts.
When content of carbon black in above-mentioned scope, first rubber combination that is used for conveying belt of the present invention of gained has the abrasion resistance that good breaking tenacity is become reconciled after sulfuration, therefore make conveying belt can keep its essential property.In addition, because described subsequently loss factor tan δ and energy waste index (Δ H) be all in good range, so can realize abundant minimizing on the energy consumption.As if this can ascribe the macromole interphase interaction between carbon black and above-mentioned rubber components to, and this has improved enhanced propertied.
[0029] be used for first rubber combination of conveying belt of the present invention, GPF can further improve the energy waste index according to first conveying belt of the present invention that is formed by the gained rubber combination as carbon black by using at least.
[0030]
Silicon oxide
Silicon oxide is not made any special restriction.
Illustrative example comprises the pyrogene silicon oxide, fires silicon oxide, precipitated silica, pulverizing silicon oxide, fused silica, anhydrous silicon oxide in small, broken bits, hydrated silica in small, broken bits, aqueous pure aluminium silicate and aqueous Calucium Silicate powder.
Certainly, preferred hydrated silica in small, broken bits, this is because first rubber combination that is used for conveying belt of the present invention of gained has better breaking tenacity and abrasion resistance after sulfuration.
[0031] can will be purchased product as this type of silicon oxide.The illustrative example of hydrated silica in small, broken bits comprises Nipsil AQ (Nippon Silica Kogyo KK) and Tokusil GU (TokuyamaCorporation).
[0032] be used for first rubber combination of conveying belt of the present invention, the content of the described silicon oxide of rubber components of per 100 weight parts is 5 to 25 weight parts, and 10 to 20 weight parts preferably.
When silica content in above-mentioned scope, all in good range, this can realize the abundant minimizing on the energy consumption to first rubber combination that is used for conveying belt of the present invention of gained at the loss factor tan δ that has after the sulfuration and energy waste index (Δ H).It is littler that its reason may be that silicon oxide and the intermolecular interaction of above-mentioned rubber components can be made into, for carbon black.
[0033] is being used for first rubber combination of conveying belt of the present invention, the nitrogen adsorption specific surface area (N that silicon oxide has
2SA) be 100 to 250m
2/ g, and preferably 125 to 200m
2/ g.
The nitrogen adsorption specific surface area is the another kind of feature that silicon oxide is adsorbed onto the useable surface area on the rubber molecule, and it is as the measurement amount that is adsorbed onto the nitrogen of silicon oxide surface.When this was worth in the above range, all in better scope, this can realize the abundant minimizing on the energy consumption to first rubber combination that is used for conveying belt at the described subsequently loss factor tan δ after the sulfuration and energy waste index (Δ H).
[0034]
Silane coupling agent
For silane coupling agent, preferably use polysulfide type silane coupling agent used in the rubber applications.
The illustrative example of described multiple sulfides silane coupling agent comprises two (3-triethoxysilylpropyltetrasulfide) tetrasulfides and two (3-triethoxysilylpropyltetrasulfide) disulphide.
Certainly, preferred two (3-triethoxysilylpropyltetrasulfide) tetrasulfides, this is that first rubber combination of conveying belt of the present invention has after sulfuration even better breaking tenacity because be used for.
[0035] can will be purchased product as this type of silane coupling agent.
Specific examples comprises two (3-triethoxysilylpropyltetrasulfide) tetrasulfides (Si69, Degussa produces) and two (3-triethoxysilylpropyltetrasulfide) disulphide (Si75, Degussa produces).
[0036] be used for first rubber combination of conveying belt of the present invention, the content of the described silane coupling agent of rubber components of per 100 weight parts is 0.5 to 3 weight parts, and 1 to 2 weight part preferably.
When silane coupling agent content in above-mentioned scope, first rubber combination that is used for conveying belt of the present invention of gained has good breaking tenacity after sulfuration.Think that this is because the increase of chemical bond between silane coupling agent and the silicon oxide.
[0037] Diethylene Glycol
Diethylene Glycol is to have chemical formula (CH
2OHCH
2)
2The compound of O.
Nippon Shokubai Co., Ltd. produce is purchased product and can be used as Diethylene Glycol.
[0038] be used for first rubber combination of conveying belt of the present invention, the content of the rubber components Diethylene Glycol of per 100 weight parts is 0.5 to 4.5 weight parts, 0.5 to 2 weight part preferably, and be more preferably 0.6 to 1.8 weight part.
When Diethylene Glycol content in above-mentioned scope, all in good range, so this makes it can realize the abundant minimizing on the energy consumption to first rubber combination that is used for conveying belt of gained at the described subsequently loss factor tan δ after the sulfuration and energy waste index (Δ H).Think that this is because the minimizing of interaction of molecules between silicon oxide and the rubber components.
[0039] except that mentioned component, in a preferred embodiment, first rubber combination that is used for conveying belt of the present invention also comprises 1, two (the lemon Kang Ya acid amides methyl) benzene (1 of 3-, 3-bis (citraconimidomethyl) benzene) and/or two hydration hexa-methylenes-1, two (Sulfothiorine) (hexamethylene-1,6-bis (thiosulfate) the disodium salt dihydrate) of 6-.
At this, 1, benzene is the compound with following chemical formula (1) to 3-two (lemon Kang Ya acid amides methyl), and two hydration hexa-methylenes-1,6-two (Sulfothiorine) is the compound with following chemical formula (2).
[0040]
[0041] comprise these compounds and make that the described subsequently energy waste index (Δ H) of the rubber combination of winning be used for conveying belt of the present invention is littler, this can realize the abundant minimizing on the energy consumption.
This is because be used for institute's rubber combination of winning described subsequently tensile strength (M when 25% elongation of conveying belt of the present invention
25) higher and loss factor tan δ is lower.Yet, consider that these compounds are the reagent (the anti-agent of reverting) that stops rubber combination to revert, this effect is unexpected.
[0042] be used for the rubber combination of winning of conveying belt of the present invention, the content of these compounds of rubber components of per 100 weight parts is 0.1 to 2 weight part preferably, and is more preferably 0.2 to 1 weight part.
1, two (lemon Kang Ya acid amides methyl) benzene and the two hydration hexa-methylenes-1 of 3-, under two (Sulfothiorine) the two situation about all comprising of 6-, this content refers to its total content.
[0043] can product these compounds as first rubber combination that is used for conveying belt of the present invention will be purchased.
For example, Perkalink 900 (Flexsys production) can be used as 1, two (the lemon Kang Ya acid amides methyl) benzene of 3-, and Duralink HTS (Flexsys) can be used as two hydration hexa-methylenes-1,6-two (Sulfothiorine).
[0044] except that various mentioned components, first rubber combination that is used for conveying belt of the present invention also can comprise linking agent for example vulcanizing agent, vulcanization aid and vulcanization accelerator, and vulcanization retarder.
Various other compounding ingredients (compounding ingredient) in addition, can reach under the object of the invention situation, in all can be included in.
[0045] exemplary vulcanizing agent comprises sulphur based vulcanization agent, organo-peroxide type vulcanizing agent, metal oxide type vulcanizing agent, resol and quinone dioxime.
The illustrative example of sulphur based vulcanization agent comprises sulphur, surface-treated sulphur, insoluble sulphur, dimorpholine disulphide and the alkylphenol disulphide of powdered sulphur, sedimentary sulphur, high dispersing.The illustrative example of organo-peroxide type vulcanizing agent comprises benzoyl peroxide, tert-butyl hydroperoxide, 2,4-dichlorobenzoperoxide, 2,5-2 and 2,5-dimethylhexane-2,5-two (hydrogen peroxide benzoic ether).
Other examples of the vulcanizing agent that is fit to comprise magnesium oxide, yellow lead oxide, p-quinone dioxime, to dibenzoylquinone dioxime, polyparadinitrosobenzene and methylene-dianiline.
[0046] exemplary vulcanization accelerator comprises aldehyde ammonia, guanidine, thiocarbamide, thiazole, sulfinyl amine, thiuram and dithiocar-bamate type promotor.
The example of aldehyde ammonia type promotor is vulkacit H (H).
The example of guanidine type promotor is a vulkacit D.
The example of thiocarbamide type promotor is an ethylene thiourea.
The example of thiazole type accelerator comprises bisbenzothiazole disulphide (DM), 2-mercaptobenzothiazole and its zinc salt.
The example of sulfinyl amine type promotor comprises N-cyclohexyl-2-[4-morpholinodithio sulfinyl amine (CZ) and the N-tertiary butyl-2-[4-morpholinodithio sulfinyl amine (NS).
The example of thiuram type promotor comprises tetramethyl thiuram disulfide (TMTD) and two pentamethylene thiuram tetrasulfide.
But the example of dithiocar-bamate type promotor comprises Sodium dimethyldithiocarbamate 40min, ziram, tellurium diethyl dithiocarbamate, cupric dimethyldithiocarbamate, ferric dimethyl dithiocarbamate and pipecoline piperazine dithiocar-bamate (pipecoline pipecolyl dithiocarbamate).
[0047] also operable vulcanization aid comprises General Purpose Rubber auxiliary agent for example zinc oxide, stearic acid, oleic acid and its zinc salt.
[0048] when comprising described vulcanizing agent, vulcanization accelerator and vulcanization aid, its total content of the rubber components of per 100 weight parts is 0.1 to 10 weight part preferably, and is more preferably 0.5 to 5 weight part.When content was in this scope, first rubber combination that is used for conveying belt of the present invention of gained had better breaking tenacity and described subsequently better loss factor tan δ and energy waste index (Δ H) after sulfuration.
[0049] illustrative example of vulcanization retarder comprises organic acid for example Tetra hydro Phthalic anhydride, phenylformic acid, Whitfield's ointment and acetylsalicylic acid; Nitroso compound is N nitrosodiphenyl amine, N-nitroso-group phenyl-beta-naphthylamine and N nitrosotrimethyl dihydroqninoline polymkeric substance for example; Halogen compounds is trichloromelamine for example; 2-mercaptobenzimidazole; With Santogard PVI.
When comprising vulcanization retarder, its content of the rubber components of per 100 weight parts is 0.1 to 0.3 weight part preferably, and is more preferably 0.1 to 0.2 weight part.When content was in this scope, first rubber combination that is used for conveying belt of the present invention of gained had improved coking stability (scorch stability) and manufacturability when extruding the formation conveying belt
[0050] example of compounding ingredient comprises toughener (filler), anti degradant, antioxidant, pigment (dyestuff), softening agent, thixotropic agent, UV light absorber, fire retardant, solvent, tensio-active agent (comprising the leveling agent), dispersion agent, dewatering agent, rust-preventive agent, tackifier, static inhibitor and the processing aid that above-mentioned carbon black is outer.
These compounding ingredients can be compositions commonly used in the rubber combination.To comprising the amount of described compounding ingredient can suitably select and without any special restriction.
[0051] preparation that is used for first rubber combination of conveying belt of the present invention can be undertaken by following steps, promptly add above-mentioned rubber components, carbon black, silicon oxide, silane coupling agent and Diethylene Glycol together, and the various wherein desired compounding ingredients that comprise, use Banbury mixing tank etc. is mediated, and uses introducing vulcanizing agent, vulcanization aid and vulcanization accelerators such as roller mill subsequently.
Sulfuration can be carried out under used usually condition.For example, can under about 140 ℃ to about 150 ℃, heating vulcanize in about 0.5 hour.
[0052] conveying belt (abbreviating " first conveying belt of the present invention " sometimes hereinafter as) according to first aspect present invention covers the conveying belt that rubber layer, enhancement layer and bottom covering rubber layer are formed by the top, and wherein the back side of bottom covering rubber layer is formed by above-mentioned first rubber combination that is used for conveying belt of the present invention at least.
Below in conjunction with Fig. 1 first conveying belt of the present invention is described.Yet the structure to first conveying belt of the present invention does not carry out any special restriction, is used in the back side that the bottom covers rubber layer as long as be used for above-mentioned first rubber combination of conveying belt of the present invention.
[0053] Fig. 1 is the schematic cross-section according to the preferred embodiment of first conveying belt of the present invention.In Fig. 1, symbol 1 is represented conveying belt, the 2nd, and the top covers rubber layer, the 3rd, enhancement layer, the 4th, and the bottom covers rubber layer, the 5th, and transportation of cargo surface, 11 and 16 is outer, and 12 and 15 is internal layers.
As shown in Figure 1, conveying belt 1 has enhancement layer 3, and described enhancement layer 3 is as the middle layer and place and have the top and cover the both sides that rubber layer 2 and bottom cover rubber layer 4.The top covers rubber layer 2 and is made up of two-layer: skin 11 and internal layer 12.The bottom covers rubber layer and is made up of two-layer equally: skin 16 and internal layer 15.At this, can use different rubber combinations to form skin and internal layer (skin 11 and internal layer 12, skin 16 and internal layer 15) that the top covers rubber layer 2 and bottom covering rubber layer 4 respectively.
[0054] in Fig. 1, the top covers rubber layer 2 and is made up of two-layer: skin 11 and internal layer 12.Yet, in first conveying belt of the present invention, form the number of plies that the top covers rubber layer 2 and be not limited to two layers, and can be one deck or three layers or more.In the number of plies was three layers or more situation, can using mutually, different rubber combinations formed these layers.Identical therewith situation also can be used for the bottom and cover rubber layer 4.
Because wish as the skin 11 that the top covers the transportation of cargo surface 5 of rubber layer 2 be by have excellent properties for example the rubber combination of thermotolerance, abrasion resistance and oil-proofness formed, so top covering rubber layer 2 preferably is made up of two-layer.
The skin 16 that covers the back side of rubber layer 4 as the bottom is formed by first rubber combination that is used for conveying belt of the present invention.In addition since produce cost and with the adherent importance of enhancement layer 3, wish that the internal layer 15 that the bottom covers rubber layer 4 is formed by another rubber combination.Therefore, covering rubber layer 4 in bottom preferably is made up of two-layer.
[0055] any special restriction is not carried out at the center of enhancement layer 3.Can suitably select to use any material that is used in the conventional conveying belt.The illustrative example of described material comprises the nylon canvas and the steel wire cord of the material made by cotton, artificial or synthon (it is applied or dipping by rubber dough (rubber cement) or RFL (Resorcinol-formaldehyde-latex), folds processing subsequently), special spinning.In these materials each all can be used separately, maybe can carry out two or more stacked and uses together.
The shape of enhancement layer 3 is not carried out any special restriction.For example, it can be a plate shape shown in Figure 1, or can be made up of the embedded enhancing silk that is arranged in parallel.
[0056] the top does not cover the internal layer 12 of rubber layer 2 and rubber combination that the bottom covers the internal layer 15 of rubber layer 4 limits especially to forming.Can suitably select to use the rubber combination that is used in the conventional conveying belt.Can use single type separately, maybe can be with the combined hybrid of two or more types and use together.
[0057] do not limit especially forming the rubber combination that the top covers the skin 11 of rubber layer 2.According to this outer required essential property (for example thermotolerance, abrasion resistance and oil-proofness), can suitably select to use the rubber combination that is used in the conventional conveying belt.
[0058] because in first conveying belt of the present invention, at least the back side of bottom covering rubber layer is formed by first rubber combination that is used for conveying belt of the present invention, so it can realize the abrasion resistance that the abundant minimizing on the energy consumption keeps for example high breaking tenacity of essential property to become reconciled simultaneously.
[0059] in first conveying belt of the present invention, the bottom covers thickness preferred 5 that rubber layer has to 20mm, and is more preferably 6 to 15mm.At this, be by internal layer and outer made when the bottom covers rubber layer, the thickness of bottom covering rubber layer is meant the total thickness of these layers.
If the bottom covers the thickness of rubber layer in this scope,, also can avoid the flute profile wearing and tearing (cupping) of the band that causes owing to rubber deterioration and other reason even when using its transport high temperature article.
[0060] preparation method to first conveying belt of the present invention has no particular limits.Can use any method commonly used for this purpose.An example of preferred method is at first to use roller mill, kneading machine, Banbury mixing tank etc. with starting raw material processing together, and use roller calender etc. will be used for each rubber combination that covers rubber layer and form plate.Subsequently, with stacked thus obtained each layer of predefined procedure, wherein enhancement layer is positioned at interlayer, applies 10 to 60 minutes pressure then under 140 to 170 ℃ temperature.
[0061] according to the rubber combination that is used for conveying belt (hereinafter also abbreviating " second rubber combination that is used for conveying belt of the present invention " as) of second aspect present invention be have under 20 ℃, 10% elongation and 0.04 to 0.07 the loss factor tan δ that uses under the 10Hz frequency that ± 2% amplitude strain swing records and by the rubber combination of the energy waste index (Δ H) of following formula (1) defined the highest 0.080.
ΔH＝(SpGr×tan?δ)/M
25 (1)
Proportion (g/cm when wherein SpGr is 20 ℃
3), tan δ be under 20 ℃, 10% elongation and under the 10Hz frequency, use the loss factor that ± 2% amplitude strain swing records, and M
25Be the tensile strength (MPa) when 25% elongation.
[0062] a second aspect of the present invention relates to the energy waste of band in the delivery system, particularly the energy waste that rises during by roller when conveying belt when operation.The purpose of this paper is to reduce described energy waste, and reduces energy consumption in the entire belt delivery system thus.
The specific nature of second rubber combination that is used for conveying belt of the present invention has below been described.
[0063]
Loss factor tan δ
Loss factor tan δ is expressed as the storage modulus E ' and the out-of-phase modulus E that represent the rubber combination behavioral characteristics " ratio, i.e. tan δ=E "/E '.This value is low more, and the amount (amount of power loss) of the energy that dissipates with hot form in the building rubber compound composition deformation is just few more.Therefore, this value can be as the tolerance of power loss.
Simultaneously,, the surface shows that lower energy consumption is possible though going up low tan δ value, as pointed in above-mentioned being entitled as " the problem to be solved in the present invention ", if tan δ value is too small, and breaking tenacity (T
B) and extension at break (E
B) reduce, cause the fluctuation of service of conveying belt.
Therefore, in the present invention, tan δ value is set in the concrete scope so that realize essential property that lower energy consumption becomes reconciled for example breaking tenacity and extension at break, and also can be used on the transport unit line of the conveying belt that need have higher character.
[0064] therefore, the loss factor tan δ that is used for second rubber combination of conveying belt of the present invention is 0.04 to 0.07, and is preferred 0.05 to 0.07, more preferably 0.05 to 0.065, and more preferably 0.055 to 0.065.
In the present invention, loss factor tan δ is meant and uses the specimen that is cut into strip (20mm (L) * 5mm (W) * 2mm (T)), under 20 ℃, 10% elongation and under the 10Hz frequency, use ± 2% amplitude strain swing and measure the loss factor that is obtained, described sample is from by carrying out the vulcanizate that sulfuration in 30 minutes obtains at 148 ℃ to second rubber combination that is used for conveying belt of the present invention.
[0065]
Energy waste index (Δ H)
Energy waste index (Δ H) is represented by following formula (1).
Formula (1) is to be used at present in the tire industry instructing the formula of the efficient that reduces with pavement friction, but thinks that it reduces for the energy consumption of estimating the rubber combination by being used for conveying belt also is effective.
Proportion (the g/cm when SpGr in the following formula (1) represents 20 ℃
3).If this value is very little, can reduce gross weight, make the less energy-consumption effect that is equivalent to little load be achieved.
In addition, as mentioned above, the tan δ power loss that the building rubber compound composition deformation causes during by roller to conveying belt works in the following formula (1).When this value is very little, can realize low energy consumption effect.
M in the formula (1)
25Tensile strength (MPa) when being illustrated in 25% elongation.Because the rigidity of its expression band (can think to substitute the characteristic of hardness), it influences the rubber combination deflection.Under the high value, have low deflection, make it possible to achieve low energy consumption effect.In the present invention, M
25Be meant the specimen of use with No. 3 dumbbell shape punching press, according to JIS K6251-2004 carry out under the test rate of 500mm/min tension test and 25% the elongation under at indoor temperature measurement tensile strength (M
25) value that (MPa) obtained, described specimen is from obtaining vulcanizate by at 148 ℃ second rubber combination that is used for conveying belt of the present invention being carried out sulfuration in 30 minutes.
Therefore, the technical significance of following formula (1) is, based on these character, by with the product of SpGr and tan δ divided by M
25, can synthetically estimate the power loss when rubber combination passes through roller.Therefore, income value can be used as the index whether rubber combination that is used for conveying belt is suitable for the conveying belt that is intended to cut down the consumption of energy.
[0066] for second rubber combination of conveying belt of the present invention, the energy waste index shown in the following formula (1) (Δ H) is the highest by 0.080, preferably the highest by 0.07, more preferably less than 0.07 and be more preferably 0.030 to 0.065.
[0067] as mentioned above, second rubber combination that is used for conveying belt of the present invention be the tan δ that under predetermined condition, records be 0.04 to 0.07 and the energy waste index (Δ H) that shows of following formula (1) be the highest 0.080 rubber combination.
Although following formula comprises tan δ in (1), the value of loss factor tan δ is set in reason in 0.04 to 0.07 the scope and is if tan δ less than 0.04, even, can not guarantee essential property for example breaking tenacity and extension at break when energy waste index (Δ H) is 0.080 or more hour.
[0068] second rubber combination that is used for conveying belt of the present invention preferably comprises the rubber components of being made up of natural rubber and polybutadiene rubber.By comprising the rubber components of being made up of natural rubber and polybutadiene rubber, second rubber combination that is used for conveying belt of the present invention has the abrasion resistance that good breaking tenacity is become reconciled after sulfuration, make that the essential property of conveying belt is kept.
At this, can use the above-mentioned polybutadiene rubber identical polybutadiene rubber relevant with first rubber combination that is used for conveying belt of the present invention.For with the relevant same cause of first rubber combination that is used for conveying belt of the present invention, the weight-average molecular weight of polybutadiene rubber preferably at least 500,000 and preferred end modified polybutadiene rubber.
[0069] second rubber combination that is used for conveying belt of the present invention preferably comprises rubber components, carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol of being made up of natural rubber and polybutadiene rubber.By not only comprising natural rubber and polybutadiene rubber, and comprise carbon black, silicon oxide, silane coupling agent and Diethylene Glycol, second rubber combination that is used for conveying belt of the present invention has the abrasion resistance that good breaking tenacity is become reconciled after sulfuration.Therefore, can keep the essential property of conveying belt, and because loss factor tan δ and energy waste index (Δ H) all in good range, this can realize the more abundant minimizing on the energy consumption.
At this, the carbon black of use, silicon oxide, silane coupling agent and Diethylene Glycol can be those that describe in detail about first rubber combination that is used for conveying belt of the present invention.
[0070] in addition, preferably comprise the rubber components of making by natural rubber and polybutadiene rubber for second rubber combination that is used for conveying belt of the present invention, carbon black, silicon oxide, silane coupling agent and Diethylene Glycol, natural rubber in the rubber components and polybutadiene rubber have weight ratio NR/BR between 80/20 to 25/75, the rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts, the rubber components silica content of per 100 weight parts is 5 to 25 weight parts, the rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and the rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.By carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol that comprises specified quantitative, second rubber combination that is used for conveying belt of the present invention has the abrasion resistance that good breaking tenacity is become reconciled after sulfuration, therefore make it can keep the essential property of conveying belt.In addition because loss factor tan δ and energy waste index (Δ H) be in addition more preferably in the scope, can realize the minimizing on the energy consumption more fully.
[0071] be used for second rubber combination of conveying belt of the present invention, the weight ratio NR/BR of natural rubber and polybutadiene rubber is more preferably 70/30 to 50/50 in rubber components, and is more preferably 70/30 to 60/40.
The rubber components content of carbon black of per 100 weight parts is more preferably 20 to 30 weight parts, and is more preferably 25 to 30 weight parts.
The rubber components silica content of per 100 weight parts is more preferably 10 to 20 weight parts.
The rubber components silane coupling agent content of per 100 weight parts is more preferably 1 to 2 weight part.
The rubber components Diethylene Glycol content of per 100 weight parts is more preferably 0.5 to 2 weight part, and is more preferably 0.6 to 1.8 weight part.
[0072] is used for second rubber combination of conveying belt of the present invention, as for first rubber combination that is used for conveying belt of the present invention, wishing the nitrogen adsorption specific surface area (N of the silicon oxide of use
2SA) preferably 100 to 250m
2/ g, and be more preferably 125 to 200m
2/ g.
[0073] in a preferred embodiment, situation as first rubber combination that is used for conveying belt of the present invention, second rubber combination that is used for conveying belt of the present invention comprises 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, 6-two (Sulfothiorine).
At this, as being used for first rubber combination of conveying belt of the present invention, 1, benzene is the compound of above chemical formula (1) to 3-two (lemon Kang Ya acid amides methyl), and two hydration hexa-methylenes-1,6-two (Sulfothiorine) is the compound of above chemical formula (2).
[0074] comprise second rubber combination that is used for conveying belt of the present invention that these compounds make gained and have littler energy waste index (Δ H), this can realize the abundant minimizing on the energy consumption.This is because be used for the tensile strength (M of second rubber combination when 25% elongation of conveying belt of the present invention
25) improve and loss factor tan δ littler.Yet, consider that these compounds are the reagent (the anti-agent of reverting) that stops rubber combination to revert, this effect is beat all.
[0075] be used for second rubber combination of conveying belt of the present invention, the content of these compounds of rubber components of per 100 weight parts is 0.1 to 2 weight part preferably, and is more preferably 0.2 to 1 weight part.
1, two (lemon Kang Ya acid amides methyl) benzene and the two hydration hexa-methylenes-1 of 3-, under two (Sulfothiorine) the two situation about all comprising of 6-, this content refers to its total content.
[0076] can be purchased product these compounds about first rubber combination that is used for conveying belt of the present invention with for example above-mentioned as second rubber combination that is used for conveying belt of the present invention.
[0077] except that various mentioned components, second rubber combination that is used for conveying belt of the present invention also can comprise linking agent for example vulcanizing agent, vulcanization aid and vulcanization accelerator, and vulcanization retarder.
Various other compounding ingredients in addition, can reach under the object of the invention situation, in all can be included in.
The vulcanizing agent of Shi Yonging, vulcanization aid, vulcanization accelerator, vulcanization retarder and various compounding ingredients can be that those that describe in detail about first rubber combination that is used for conveying belt of the present invention are identical herein.
[0078] conveying belt (abbreviating " second conveying belt of the present invention " sometimes hereinafter as) according to second aspect present invention covers the conveying belt that rubber layer, enhancement layer and bottom covering rubber layer are formed by the top, and wherein the back side of bottom covering rubber layer is formed by above-mentioned second rubber combination that is used for conveying belt of the present invention at least.
That is to say that second conveying belt of the present invention is used for first rubber combination that is used for conveying belt of the present invention that second rubber combination of conveying belt of the present invention replaces first conveying belt of the invention described above to use.In addition, the further feature of second conveying belt of the present invention is identical with first conveying belt of the present invention.
[0079] in second conveying belt of the present invention, because the back side of bottom covering rubber layer is formed by second rubber combination that is used for conveying belt of the present invention at least, so the abrasion resistance that can keep for example high breaking tenacity of essential property to become reconciled simultaneously in the abundant minimizing on the realization energy consumption.
[0080] preparation method to second conveying belt of the present invention has no particular limits.Can use any method commonly used.
Can produce by the method identical with being used for first conveying belt of the present invention.
Embodiment
[0081] rubber combination that is used for conveying belt of the present invention has been described in further detail in following examples, embodiment be illustrative and do not constitute to the invention restriction.
Use has the one-tenth of the amount shown in the following table 1 (weight part is based on per 100 parts by weight of rubber components) and assigns to prepare the rubber combination that is used for conveying belt.The various character of rubber combination after sulfuration for each gained are measured and are estimated.The result is presented in the following table 1.
Reference example 1 and 2 is preparation and the embodiment 5 of JP 11-139523 A and the embodiment of comparative example 2 identical rubber combinations.Two reference examples all do not comprise silicon oxide, Diethylene Glycol and silane coupling agent, so they are comparative examples.Measure and the physical properties of evaluation except that abrasion resistance by method shown below.
[0082]
Physical properties after the sulfuration
(1) breaking tenacity
At 148 ℃ every kind of rubber combination that is obtained is carried out sulfuration in 30 minutes and prepare the sulfurized rubber combination.
Use comes from the sulfurized rubber combination of each preparation, with the specimen of No. 3 dumbbell shape punching press, under the test rate of 500mm/min, carry out tension test according to JIS K6251-2004, and at room temperature measure breaking tenacity (TB) (MPa).
When breaking tenacity is that 14MPa lives when higher, sample has higher breaking tenacity.
[0083] (2) abrasion resistance
According to JISK6264-2-2005, use the sulfurized rubber combination come from each preparation, carry out the DIN wear testing with the specimen of disk shape (16.2mm diameter * 6mm is thick) punching press.Measure the abrasion loss (mm that carries out under the room temperature in the DIN wear testing
3).
Has 120mm
3Or the sample of lower abrasion loss has abrasion resistance (good).
[0084] (3) loss factor tan δ
Use comes from the sulfurized rubber combination of each preparation, with the specimen of strip (20mm (L) * 5mm (W) * 2mm (T)) punching press, measure loss factor tan δ by the viscoelastic spectrometer that Toyo Seiki Seisaku-Sho Ltd. produces.Under 20 ℃, 10% elongation and under the 10Hz frequency, use ± 2% amplitude strain swing and measure.
[0085] (4) energy waste index (Δ H)
Measure the proportion of the sulfurized rubber combination of each preparation.
Use comes from the sulfurized rubber combination of each preparation, with the specimen of No. 3 dumbbell shape punching press, under the test rate of 500mm/min, carry out tension test according to JIS K6251-2004, and measure the tensile strength (M under 25% elongation
25) (MPa).
Subsequently, use is for proportion, the M of above-mentioned measurement
25With the value separately of loss factor tan δ, determine the energy waste index (Δ H) of the sulfurized rubber combination of each preparation by following formula (1).
[0086] table 1 (part 1)
[0087] table 1 (part 2)
[0088] table 1 (part 3)
[0089] table 1 (part 4)
[0090] table 1 (part 5)
[0091] table 1 (part 6)
[0092] following material is as constituting rubber components and other composition of going up composition shown in the table 1.
Natural rubber (NR): RSS# 3
Polybutadiene rubber (VCR): VCR617 (Ube Industries)
BR1:Nipol BR1220 (weight-average molecular weight, 460,000; Terminal unmodified; ZeonCorporation)
BR2:Nipol BR1250H (weight-average molecular weight; 570,000; Carry out end modified with NMP; Zeon Corporation)
Carbon black 1:HAF (Shoblack N339; Showa Cabot)
Carbon black 2:GPF (Diablack G; Mitsubishi Chemical Corporation)
Silicon oxide 1: hydrated silica in small, broken bits (nitrogen adsorption specific surface area (N
2SA): 202m
2/ g; NipsilAQ; Nippon Silica Kogyo)
Silicon oxide 2: hydrated silica in small, broken bits (nitrogen adsorption specific surface area (N
2SA): 120m
2/ g; TokusilGU; Tokuyama Corporation)
Silicon oxide 3: hydrated silica in small, broken bits (nitrogen adsorption specific surface area (N
2SA): 144m
2/ g; Zeosil165GR; Rhodia Silica Korea)
Silicon oxide 4: hydrated silica in small, broken bits (nitrogen adsorption specific surface area (N
2SA): 159m
2/ g; Ultrasil7000GR; United Silica Industrial)
Diethylene Glycol: Nippon Shokubai produces
Silane coupling agent: two (3-triethoxysilylpropyltetrasulfide) tetrasulfide (Si69; Degussa)
Vulcanizing agent 1: the sulphur (sulphur of oil treatment; Hosoi Chemical Industry)
The vulcanization accelerator 1:N-tertiary butyl-2-[4-morpholinodithio sulfinyl amine (Nocceler NS; OuchiShinko Chemical Industrial Co.)
The anti-agent 1:1 that reverts, two (lemon Kang Ya acid amides methyl) benzene (the Perkalink K 900 of 3-; Flexsys)
Anti-2: the two hydration hexa-methylenes-1 of agent that revert, and 6-two (Sulfothiorine) (Duralink HTS, Flexsys)
[0093] can draw because their physical propertiess after sulfuration from the result shown in the table 1, the rubber combination that obtains in the embodiment of the invention 1 to 26 is the rubber combination that is suitable for conveying belt, and it can realize the abrasion resistance that the abundant minimizing on the energy consumption keeps for example high breaking tenacity of essential property to become reconciled simultaneously.
On the contrary, based on the physical properties after the sulfuration, find not contain Diethylene Glycol (comparative examples 1 to 5) such as rubber combinations, comprise the rubber components with low ratio NR rubber combination (comparative example 6), comprise a large amount of sooty rubber combinations (comparative example 7), the rubber combination that comprises the rubber combination (comparative example 8) of a large amount of silicon oxide and reference example 1 and 2 is the rubber combination of abundant minimizing on have the high energy losses index (Δ H) and the energy consumption.
[0094] rubber combination that comprises the anti-agent of reverting that obtains among the embodiment 13 to 21 has the M of increase
25With low loss factor tan δ, therefore has lower energy waste index (Δ H).Therefore, find they be suitable for can be more abundant the rubber combination of the conveying belt that reduces of realization energy consumption.
Especially, comprise anti-revert agent and the silicon oxide wherein that obtain among the embodiment 18 to 21 have the nitrogen adsorption specific surface area of preferable range (125 to 200m
2/ rubber combination g) has the M of increase
25With low loss factor tan δ, therefore has lower energy waste index (Δ H).
Therefore, find they be suitable for can be more abundant the rubber combination of the conveying belt that reduces of realization energy consumption.
[0095] rubber combination that comprises the end modified polyhutadiene with at least 500,000 weight-average molecular weight that obtains among the embodiment 24 to 26 has the M of increase
25With low loss factor tan δ, therefore has lower energy waste index (Δ H).
Therefore, find they be suitable for can be more abundant the rubber combination of the conveying belt that reduces of realization energy consumption.
Claims (15)
1, a kind of rubber combination that is used for conveying belt, comprise rubber components, carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol formed by natural rubber (NR) and polybutadiene rubber (BR), wherein: natural rubber in the rubber components and polybutadiene rubber have weight ratio NR/BR between 80/20 to 25/75
The rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts,
The rubber components silica content of per 100 weight parts is 5 to 25 weight parts,
The rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and
The rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.
2, the rubber combination that is used for conveying belt of claim 1 also comprises 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, 6-two (Sulfothiorine).
3, the rubber combination that is used for conveying belt of claim 2, wherein per 100 parts by weight of rubber components 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, the content of 6-two (Sulfothiorine) is 0.1 to 2 weight part.
4, each the rubber combination that is used for conveying belt in the claim 1 to 3, wherein silicon oxide has 100 to 250m
2Nitrogen adsorption specific surface area (the N of/g
2SA).
5, each the rubber combination that is used for conveying belt in the claim 1 to 4, wherein polybutadiene rubber (BR) is end modified polybutadiene rubber.
6, a kind of conveying belt comprises that the top covers rubber layer, enhancement layer and bottom and covers rubber layer, and wherein the back side of bottom covering rubber layer is formed by each the rubber combination that is used for conveying belt in the claim 1 to 5 at least.
7, a kind of rubber combination that is used for conveying belt, have under 20 ℃, 10% elongation and 0.04 to 0.07 the loss factor tan δ that uses under the 10Hz frequency that ± 2% amplitude strain swing records and the highest 0.080 by the defined energy waste index of following formula (1) (Δ H)
ΔH＝(SpGr×tan?δ)/M
25 (1)，
Proportion (g/cm when wherein SpGr is 20 ℃
3), tan δ be under 20 ℃, 10% elongation and under the 10Hz frequency, use the loss factor that ± 2% amplitude strain swing records, and M
25Be the tensile strength (MPa) when 25% elongation.
8, the rubber combination that is used for conveying belt of claim 7 comprises the rubber components of being made up of natural rubber (NR) and polybutadiene rubber (BR).
9, the rubber combination that is used for conveying belt of claim 7 comprises rubber components, carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol be made up of natural rubber (NR) and polybutadiene rubber (BR).
10, the rubber combination that is used for conveying belt of claim 7 comprises rubber components, carbon black, silicon oxide, silane coupling agent and the Diethylene Glycol be made up of natural rubber (NR) and polybutadiene rubber (BR), wherein:
The weight ratio NR/BR of natural rubber and polybutadiene rubber is between 80/20 to 25/75 in the rubber components,
The rubber components content of carbon black of per 100 weight parts is 15 to 35 weight parts,
The rubber components silica content of per 100 weight parts is 5 to 25 weight parts,
The rubber components silane coupling agent content of per 100 weight parts is 0.5 to 3 weight parts, and
The rubber components Diethylene Glycol content of per 100 weight parts is 0.5 to 4.5 weight parts.
11, each the rubber combination that is used for conveying belt in the claim 9 or 10, wherein silicon oxide has 100 to 250m
2Nitrogen adsorption specific surface area (the N of/g
2SA).
12, each the rubber combination that is used for conveying belt in the claim 8 to 11, wherein polybutadiene rubber (BR) is end modified polybutadiene rubber.
13, each the rubber combination that is used for conveying belt in the claim 7 to 12 also comprises 1, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, 6-two (Sulfothiorine).
14, the rubber combination that is used for conveying belt of claim 13, the rubber components 1 of wherein per 100 weight parts, two (lemon Kang Ya acid amides methyl) benzene and/or the two hydration hexa-methylenes-1 of 3-, the content of 6-two (Sulfothiorine) is 0.1 to 2 weight part.
15, a kind of conveying belt comprises that the top covers rubber layer, enhancement layer and bottom and covers rubber layer, and wherein the back side of bottom covering rubber layer is formed by each the rubber combination that is used for conveying belt in the claim 7 to 14 at least.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006194693 | 2006-07-14 | ||
| JP194693/2006 | 2006-07-14 | ||
| JP079313/2007 | 2007-03-26 | ||
| JP2007079313A JP4286298B2 (en) | 2006-07-14 | 2007-03-26 | Rubber composition for conveyor belt and conveyor belt |
| PCT/JP2007/063894 WO2008007733A1 (en) | 2006-07-14 | 2007-07-12 | Rubber composition for conveyor belt and conveyor belt |
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| Publication Number | Publication Date |
|---|---|
| CN101490159A true CN101490159A (en) | 2009-07-22 |
| CN101490159B CN101490159B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007800267928A Active CN101490159B (en) | 2006-07-14 | 2007-07-12 | Rubber composition for conveyor belt and conveyor belt |
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|---|---|
| JP (1) | JP4286298B2 (en) |
| CN (1) | CN101490159B (en) |
| AU (1) | AU2007273485B2 (en) |
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| CN104311896A (en) * | 2014-09-29 | 2015-01-28 | 青岛福凯橡塑新材料有限公司 | High-strength and high-wear resistance H type covering rubber for steel cord conveyor belt |
| CN104540752A (en) * | 2012-08-23 | 2015-04-22 | 横滨橡胶株式会社 | Conveyor belt |
| CN105102526A (en) * | 2013-04-15 | 2015-11-25 | 横滨橡胶株式会社 | Rubber composition for conveyor belt, and conveyor belt |
| CN106459517A (en) * | 2014-05-14 | 2017-02-22 | 横滨橡胶株式会社 | Rubber composition for conveyor belt, and conveyor belt |
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| JP4577490B2 (en) * | 2004-10-07 | 2010-11-10 | 株式会社ブリヂストン | Rubber composition for belt and belt |
| JP4553682B2 (en) * | 2004-10-27 | 2010-09-29 | 住友ゴム工業株式会社 | Rubber composition for coating steel cord and steel cord coated thereby |
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- 2007-03-26 JP JP2007079313A patent/JP4286298B2/en active Active
- 2007-07-12 WO PCT/JP2007/063894 patent/WO2008007733A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101490159B (en) | 2012-11-14 |
| AU2007273485A1 (en) | 2008-01-17 |
| AU2007273485B2 (en) | 2011-03-03 |
| JP2008038133A (en) | 2008-02-21 |
| JP4286298B2 (en) | 2009-06-24 |
| WO2008007733A1 (en) | 2008-01-17 |
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Address after: Kanagawa Prefecture, Japan Patentee after: THE YOKOHAMA RUBBER Co.,Ltd. Country or region after: Japan Address before: Tokyo, Japan Patentee before: THE YOKOHAMA RUBBER Co.,Ltd. Country or region before: Japan |