CN103131061A - Energy-saving conveyer belt primer and preparation method thereof - Google Patents
Energy-saving conveyer belt primer and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an energy-saving conveyer belt base rubber which is characterized in that after natural rubber and synthetic rubber are added into a double-roller open mill for plastication, zinc oxide, stearic acid, an anti-aging agent, a dispersing agent, a reinforcing agent, modified aramid short fibers, a softening agent and a reinforcing agent are sequentially added, and a section of rubber compound is obtained after mixing and standing; adding sulfur and an accelerator into the first-stage rubber compound for mixing; and vulcanizing to obtain the primer of the energy-saving conveying belt. According to the invention, the modified aramid short fiber is added into the rubber material, so that the heat generation of the rubber material can be effectively reduced, the hysteresis loss of the rubber material can be reduced, and the energy-saving conveyor belt primer with a low friction coefficient can be obtained; a small amount of modified aramid short fibers and a large amount of carbon black are used as a filling system, so that the wear resistance is improved while various physical and mechanical properties of the rubber material are maintained.
Description
Technical field
The present invention relates to the preparation method of energy-conservation conveying belt primer, this energy-conservation conveying belt can support the use with all kinds of large conveying quantities, long belt conveyor, is widely used in the industries such as Metallurgy Industry, coal mining, harbour.
Background technology
Conveying belt is second largest rubber industry product after tire, is active parts in transfer roller.Conveying belt have advantages of operational safety, easy to use, be easy to safeguard, and can realize serialization, long distance transportation, thereby be widely used in the mass transport of mine, harbour, metallurgy, machinery and warehousing industry.
Along with modernization science and technology develops rapidly, mechanize, automatic production level improve constantly, and the conveying belt of long distance, large width, large delivery, serialization is that vast industry is required.Yet along with the lengthening of conveying belt, widen, the power capacity that consumes in its operation work is also in continuous increase.Energy resources are in short supply all the more in the situation that energy consumption at present constantly increases, and the energy-conservation conveying belt of researchdevelopment has become inexorable trend.
From enterprise's angle, by conveying belt energy-saving consumption-reducing in use, can cut operating costs, improve Business Economic Benefit, strengthen enterprise competitiveness.Meanwhile, the cry of the global energy-saving and environmental protection of response, the research and development of energy-conservation conveying belt, production and popularization correspondingly can improve the competitive capacity of conveying belt enterprise.Guaranteeing its over-all properties simultaneously, the energy saving of research and development conveying belt is improved its production technique, releases the energy-conservation conveying belt of stable performance, treats technical maturity, is expected to product promotion to the world market.
From long-range and macroscopical angle; energy-conservation conveying belt reduces power consumption, if things go on like this, can alleviate the situation of Energy resources demand anxiety; reduce consuming the immense pressure that the energy brings to environment, for realizing that Sustainable development, reduce pollution and decrease drain, protection of the environment have great meaning.
Recognize the importance of energy-conservation conveying belt, countries in the world are all dropped into a large amount of manpower and materials and are carried out correlative study.Research is mainly carried out around conveyer belt structure innovation and formulating of recipe two aspects, namely realizes the lightweight of conveying belt from structure, from the dissipation factor tan δ of the upper reduction conveying belt of filling a prescription.Dissipation factor tan δ (out-of-phase modulus and Young's modulus ratio) is very important physical quantity, and it is an important parameter that characterizes viscoelastic material power loss (hysteresis loss).Reduce tan δ, mean the energy that can reduce the loss of sizing material internal friction institute, reduce accordingly the power consumption of conveying belt, reach energy-conservation purpose.
Sweden tall and erect youngster's fort company uses high strength, high-modulus, light-weighted aramid fiber as the conveying belt framework material, replace Steel Cord Conveyor Belt, reduce band body thickness and conveying belt own wt, reduce the watt consumption of transfer roller self, strengthen simultaneously stability, the minimizing maintenance load of conveying belt operation, be conducive to carrying, the installation and removal of conveying belt.But the cost of aramid fiber is than other framework materials, and is comparatively expensive, thereby is restricted in popularization and practical application.
2005, Liu pioneer is take the NR/SBR paralled system as benchmark, use solid lubricant mica powder or talc sizing material, with transition metal complex Cd(BDTC) 2Py is as promotor, can reduce frictional coefficient (the Liu pioneer of cross-linked rubber, the research of energy-saving conveying belt NR/SBR matrix material, South China Science ﹠ Engineering University's Master's thesis, 2005).In above research, reduce the frictional coefficient of cross-linked rubber by formulating of recipe.Yet, compare with conventional formulation, used the non-common Synergist S-421 95s such as modifier A, diatomaceous earth filler, and the transition metal complex that uses needs extra synthesizing.As seen its cost is higher, and the actual possibility of promoting is little.
Goal of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of energy-conservation conveying belt primer is provided, this primer has low-friction coefficient, high-wearing feature.
Another object of the present invention is to provide a kind of preparation method of energy-conservation conveying belt primer.
According to technical scheme provided by the invention, a kind of energy-conservation conveying belt primer, feature is, comprise following component, the component ratio is counted by weight: 40～100 parts of natural rubbers, 10～60 parts of synthetic rubber, 1～10 part of modifying aramid fiber staple fibre, 1.0～2.5 parts of sulphur, 1～5 part of zinc oxide, 1～3 part of stearic acid, 1～2.5 part of promotor, 30～60 portions of strengthening agents, 1～10 part of tenderizer, 1～5 part of anti-aging agent and 1～3 part of dispersion agent;
After adding natural rubber and synthetic rubber to plasticate, add successively zinc oxide, stearic acid, anti-aging agent, dispersion agent, strengthening agent, modifying aramid fiber staple fibre, tenderizer, strengthening agent in two roller mills, park after mixing and obtain one section rubber unvulcanizate; Add sulphur, promotor to carry out mixing in one section rubber unvulcanizate; Vulcanize again, obtain described energy-conservation conveying belt primer.
In an embodiment, described synthetic rubber is styrene-butadiene rubber(SBR) and/or cis-1,4-polybutadiene rubber.
In an embodiment, described promotor is one or more in accelerator NS, accelerant CZ, vulkacit D TDM, Vulcanization accelerator TMTD.
In an embodiment, described strengthening agent is one or more in carbon black N220, carbon black N234, carbon black N115, carbon black N330.
In an embodiment, described anti-aging agent is one or more in Microcrystalline Wax, anti-aging agent RD, antioxidant 4020, antioxidant BLE.
The preparation method of energy-conservation conveying belt primer of the present invention, feature be, comprises the following steps, and the component ratio is counted by weight:
(1) one section mixing: add 40～100 parts of natural rubbers and 10～60 parts of synthetic rubber in two roller mills, the 30～50s that plasticates, plasticating temperature are 25～30 ℃; Then add successively 1～5 part of zinc oxide, 1～3 part of stearic acid, 1～5 part of anti-aging agent, 1～3 part of dispersion agent, 15～30 portions of strengthening agents, 1～10 part of modifying aramid fiber staple fibre, 1～10 part of tenderizer, 15～60 portions of strengthening agents, mixing 15～20min, melting temperature is 40～60 ℃, namely obtains one section rubber unvulcanizate after parking 12～16h;
(2) two-stage mixing: add 1～2.5 part of sulphur, 1～2.5 part of promotor in the one section rubber unvulcanizate that obtains to step (1), mixing 3～6min, melting temperature is 40～60 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 140～150 ℃, and sulfide stress is 10～15MPa, and curing time is 20～40min, obtains described energy-conservation conveying belt primer.
The invention has the beneficial effects as follows:
(1) adopt the modifying aramid fiber staple fibre to add in sizing material, can effectively reduce sizing material and give birth to heat, reduce its hysteresis loss, obtain to have the energy-conservation conveying belt primer of low-friction coefficient;
(2) adopt a small amount of modifying aramid fiber staple fibre with a large amount of carbon blacks and be used as infill system, when keeping the every physical and mechanical properties of sizing material, having improved wear resistance.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Natural rubber in rubber matrix of the present invention is to adopt the preparation of emulsion flocculence, and natural rubber has self-enhancement, has higher mechanical strength, has simultaneously good flexible resistance, hysteresis loss is little, and living heat is low, and over-all properties is more excellent than other rubber.
Synthetic rubber of the present invention is styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber, and styrene-butadiene rubber(SBR) has good thermotolerance, ageing resistance, wear resistance, and cis-1,4-polybutadiene rubber has good wear resistance, winter hardiness and elasticity.
Promotor of the present invention is for being N tert butyl benzothiazole 2 sulfenamide (accelerator NS), N cyclohexyl 2 benzothiazole sulfenamide (accelerant CZ), 4; one or more in 4 '-dimorpholinyl disulfide (vulkacit D TDM), tetramethyl-thiuram disulfide (Vulcanization accelerator TMTD); Select and Apply suitable cross-linking system; guarantee that rubber unvulcanizate has good coke burning performance; being beneficial to the later stage carries out Compound Machining; simultaneously; obtain good crosslinking structure, make cross-linked rubber have excellent physical and mechanical properties.
Strengthening agent of the present invention is intermediate super abrasion furnace black N220, carbon black N234, super-high wear-resistant carbon black N115 or high abrasion furnace carbon black N330.
Modifying aramid fiber staple fibre of the present invention is aramid fiber short fibre through the surface modifying material of chemical reagent surface active, in joining sizing material together as strengthening agent and carbon black; The modifying aramid fiber staple fibre adds in sizing material, due to its surface modification, easily and the filler generation interaction such as carbon black, reduced the effect between filler, thereby the internal friction that has reduced sizing material is given birth to heat, can effectively reduce hysteresis loss, the minimizing of sizing material and give birth to heat, reduce the rolling resistance of sizing material, realize energy-conservation purpose; Yet the umber of modifying aramid fiber staple fibre must not surpass 10 parts, and umber increases the physical and mechanical propertiess such as tensile strength that can affect sizing material.The modifying aramid fiber staple fibre that the embodiment of the present invention is used is available from Japanese Teijin Ltd.
Anti-aging agent of the present invention is Microcrystalline Wax (being to separate the residual oil of solvent separation in still kettle by series of complex), 2,2,4-trimethylammonium-1,2-dihyaroquinoline polymer (anti-aging agent RD), N-(1, the 3-dimethylbutyl) one or more in-N'-diphenyl-para-phenylene diamine (antioxidant 4020), acetone and pentanoic pyrocondensation thing (antioxidant BLE) can provide good thermo oxidative aging, anti-ozone ageing performance for rubber item.
Described tenderizer is that petroleum softening agent, pine tar are that softening agent, coal tar are one or more in softening agent, as coumarone indene resin, aromatic hydrocarbon oil, coal tar, rosin, spindle oil, Stockholm tar, transformer wet goods, be not specifically limited, only otherwise goal of the invention of the present invention is produced restriction to be got final product.
Stearic acid of the present invention is not specifically limited, only otherwise goal of the invention of the present invention is produced restriction to be got final product; The stearic acid that adopts in the embodiment of the present invention derives from Danyang City victory and reaches chemical industry company limited.
Described dispersion agent of the present invention is not specifically limited, only otherwise goal of the invention of the present invention is produced restriction to be got final product; The dispersion agent that adopts in the embodiment of the present invention is dispersion agent FS-12.
The present invention also provides the preparation method of energy-conservation conveying belt primer, according to traditional rubber processing method, each component except sulfuration system (sulphur, promotor) is mixed in mill or Banbury mixer obtain one section rubber unvulcanizate, after parking 12～16 hours, then add vulcanization system to carry out two-stage mixing; After the two-stage mixing glue that obtains is parked for some time, extrude slice and obtain conveying belt primer film on forcing machine; At normal temperatures, primer, adhesive glue and framework material are carried out composite molding on four-roll calender; Band embryo after moulding is vulcanized on vulcanizing press, and sulfurizing temperature range is at 140～150 ℃, and sulfide stress is at 10～15MPa, curing time 20～40min; Band embryo after sulfuration just can obtain corresponding product through after cold formed.
Embodiment 1: a kind of preparation method of energy-conservation conveying belt primer comprises the following steps:
(1) one section mixing: add 450g natural rubber and 50g styrene-butadiene rubber(SBR) in two roller mills, the 40s that plasticates, plasticating temperature are 25 ℃; Then add successively 5g zinc oxide, 5g stearic acid, 5g Microcrystalline Wax, 5g dispersion agent FS-12,50g carbon black N220,5g modifying aramid fiber staple fibre, 5g Stockholm tar, 100g carbon black N330, mixing 17min, melting temperature is 40 ℃, namely obtains one section rubber unvulcanizate after parking 12h;
(2) two-stage mixing: add 5g sulphur, 5g accelerator NS in the one section rubber unvulcanizate that obtains to step (1), mixing 4min, melting temperature is 50 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 170 ℃, and sulfide stress is 10MPa, and curing time is 30min, obtains described energy-conservation conveying belt primer; The physical and mechanical properties of this energy-conservation conveying belt primer is as shown in table 1, and tan δ is as shown in table 2.
Embodiment 2: a kind of preparation method of energy-conservation conveying belt primer comprises the following steps:
(1) one section mixing: add 400g natural rubber and 100g cis-1,4-polybutadiene rubber in two roller mills, the 35s that plasticates, plasticating temperature are 25 ℃; Then add successively 12.5g zinc oxide, 10g stearic acid, 2.5g antioxidant 4020,5g anti-aging agent RD, 5g antioxidant BLE, 10g dispersion agent FS-12,100g carbon black N115,25g modifying aramid fiber staple fibre, 5g coumarone indene resin, 10g aromatic hydrocarbon oil, 5g coal tar, 125g carbon black N330, mixing 20min, melting temperature is 45 ℃, namely obtains one section rubber unvulcanizate after parking 14h;
(2) two-stage mixing: add 10g sulphur, 5g accelerator NS, 5g accelerant CZ in the one section rubber unvulcanizate that obtains to step (1), mixing 5min, melting temperature is 55 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 155 ℃, and sulfide stress is 12MPa, and curing time is 35min, obtains described energy-conservation conveying belt primer; The physical and mechanical properties of this energy-conservation conveying belt primer is as shown in table 1, and tan δ is as shown in table 2.
Embodiment 3: a kind of preparation method of energy-conservation conveying belt primer comprises the following steps:
(1) one section mixing: add 300g natural rubber, 100g styrene-butadiene rubber(SBR) and 100g cis-1,4-polybutadiene rubber in two roller mills, the 50s that plasticates, plasticating temperature are 30 ℃; Then add successively 25g zinc oxide, 15g stearic acid, 5g Microcrystalline Wax, 10g anti-aging agent RD, 10g antioxidant 4020,15g dispersion agent FS-12,125g carbon black 220,50g modifying aramid fiber staple fibre, 25g rosin, 10g spindle oil, 15g Stockholm tar, 175g carbon black N234, mixing 15min, melting temperature is 50 ℃, namely obtains one section rubber unvulcanizate after parking 16h;
(2) two-stage mixing: add 12.5g sulphur, 5g vulkacit D TDM, 7.5g part accelerator NS in the one section rubber unvulcanizate that obtains to step (1), mixing 3min, melting temperature is 40 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 140 ℃, and sulfide stress is 15MPa, and curing time is 20min, obtains described energy-conservation conveying belt primer; The physical and mechanical properties of this energy-conservation conveying belt primer is as shown in table 1, and tan δ is as shown in table 2.
Embodiment 4: a kind of preparation method of energy-conservation conveying belt primer comprises the following steps:
(1) one section mixing: add 40g natural rubber and 10g styrene-butadiene rubber(SBR) in two roller mills, the 30s that plasticates, plasticating temperature are 30 ℃; Then add successively 1g zinc oxide, 1g stearic acid, 1g antioxidant BLE, 1g dispersion agent FS-12,15g carbon black N115,1g modifying aramid fiber staple fibre, 1g Stockholm tar, 15g carbon black N330, mixing 15min, melting temperature is 60 ℃, namely obtains one section rubber unvulcanizate after parking 12h;
(2) two-stage mixing: add 1g sulphur, 1g Vulcanization accelerator TMTD in the one section rubber unvulcanizate that obtains to step (1), mixing 3min, melting temperature is 60 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 140 ℃, and sulfide stress is 15MPa, and curing time is 40min, obtains described energy-conservation conveying belt primer.
Embodiment 5: a kind of preparation method of energy-conservation conveying belt primer comprises the following steps:
(1) one section mixing: add 100g natural rubber and 60g cis-1,4-polybutadiene rubber in two roller mills, the 50s that plasticates, plasticating temperature are 25 ℃; Then add successively 5g zinc oxide, 3g stearic acid, 5g antioxidant 4020,3g dispersion agent FS-12,30g carbon black N234,10g modifying aramid fiber staple fibre, 10g rosin, 60g carbon black N330, mixing 20min, melting temperature is 40 ℃, namely obtains one section rubber unvulcanizate after parking 16h;
(2) two-stage mixing: add 2.5g sulphur, 2.5g vulkacit D TDM in the one section rubber unvulcanizate that obtains to step (1), mixing 6min, melting temperature is 40 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 150 ℃, and sulfide stress is 10MPa, and curing time is 20min, obtains described energy-conservation conveying belt primer.
Comparative Examples 1:
in two roller mills, add 450g natural rubber and 50g styrene-butadiene rubber(SBR) (SBR1712) 45s that plasticates under 25 ℃, then add successively 5g zinc oxide, the 5g stearic acid, the 5g Microcrystalline Wax, 5g dispersion agent FS-12, 50g carbon black N115, the 5g transformer oil, 100g carbon black N330, carry out once mixing, 60 ℃ of melting temperatures, mixing 16min, after parking 12 hours, add linking agent and promotor: 5g sulphur and 3g vulkacit D TDM, 1.5g accelerant CZ, 0.5g Vulcanization accelerator TMTD, mix in mill and obtain two-stage mixing glue, 60 ℃ of melting temperatures, mixing 6min, vulcanize 30min on vulcanizing press, 160 ℃ of curing temperatures, sulfide stress is
13MPa,, obtain described energy-conservation conveying belt primer; The physical and mechanical properties of this primer sees Table 1, tan δ value and sees Table 2.
Measuring method of the present invention is according to following standard:
The physical and mechanical properties testing method of conveying belt primer is come the mechanical property of test compound material by the ASTMD412 standard; Stretching experiment adopts the wide cut-off knife of 6.00mm dumbbell plate processed without exception, tears experiment and tears sample for perpendicular type; Draw speed is 500mm/min, and probe temperature is 25 ℃; Other performance tests are all completed according to the ASTM standard.
Table 1: the Performance Ratio of the embodiment of the present invention 1～3, Comparative Examples 1
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative Examples 1 |
| Tensile strength/MPa | 19.7 | 16.8 | 18.4 | 19.4 |
| 100% tensile modulus/MPa | 2.8 | 2.7 | 3.1 | 3.0 |
| 300% tensile modulus/MPa | 10.7 | 9.8 | 11 | 12.2 |
| Elongation at break/% | 504 | 485 | 483 | 454 |
| Angle tear strength/kN/m | 55 | 54 | 30 | 57 |
| Tension set/% | 30 | 25 | 54 | 25 |
| Cylinder abrasion/mm 3 | 108 | 118 | 117 | 115 |
| Shao A hardness | 68 | 70 | 73 | 70 |
| Density/g/mm 3 | 1.170 | 1.172 | 1.170 | 1.179 |
Table 2: the embodiment of the present invention 1～3, the Comparative Examples 1 tan δ value under 60 ℃
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative Examples 1 |
| tanδ | 0.31 | 0.32 | 0.34 | 0.36 |
As shown in table 1, the primer physical and mechanical properties of the embodiment that surveys 1～3 is tensile strength 〉=16.0MPa, tensile yield 〉=450%, angle tear strength 〉=30KN/m, cylinder wear(ing)value≤120mm
3, hardness 60-75A(Shao Er).
Performance Ratio by embodiment 1～3, Comparative Examples 1 can be found out, adds the primer tan δ value of modification virtue wheel staple fibre that obvious reduction is all arranged.The primer of embodiment 1, its every physical and mechanical properties all obviously is better than other embodiment.Energy-conservation primer when keeping properties, reduces tan δ value in the present invention, can realize the purpose that conveying belt is energy-conservation.
Claims (6)
1. energy-conservation conveying belt primer, it is characterized in that, comprise following component, the component ratio is counted by weight: 40～100 parts of natural rubbers, 10～60 parts of synthetic rubber, 1～10 part of modifying aramid fiber staple fibre, 1.0～2.5 parts of sulphur, 1～5 part of zinc oxide, 1～3 part of stearic acid, 1～2.5 part of promotor, 30～60 portions of strengthening agents, 1～10 part of tenderizer, 1～5 part of anti-aging agent and 1～3 part of dispersion agent;
After adding natural rubber and synthetic rubber to plasticate, add successively zinc oxide, stearic acid, anti-aging agent, dispersion agent, strengthening agent, modifying aramid fiber staple fibre, tenderizer, strengthening agent in two roller mills, park after mixing and obtain one section rubber unvulcanizate; Add sulphur, promotor to carry out mixing in one section rubber unvulcanizate; Vulcanize again, obtain described energy-conservation conveying belt primer.
2. energy-conservation conveying belt primer according to claim 1, it is characterized in that: described synthetic rubber is styrene-butadiene rubber(SBR) and/or cis-1,4-polybutadiene rubber.
3. energy-conservation conveying belt primer according to claim 1, it is characterized in that: described promotor is one or more in accelerator NS, accelerant CZ, vulkacit D TDM, Vulcanization accelerator TMTD.
4. energy-conservation conveying belt primer according to claim 1, it is characterized in that: described strengthening agent is one or more in carbon black N220, carbon black N234, carbon black N115, carbon black N330.
5. energy-conservation conveying belt primer according to claim 1, it is characterized in that: described anti-aging agent is one or more in Microcrystalline Wax, anti-aging agent RD, antioxidant 4020, antioxidant BLE.
6. the preparation method of energy-conservation conveying belt primer according to claim 1, is characterized in that, comprise the following steps, the component ratio is counted by weight:
(1) one section mixing: add 40～100 parts of natural rubbers and 10～60 parts of synthetic rubber in two roller mills, the 30～50s that plasticates, plasticating temperature are 25～30 ℃; Then add successively 1～5 part of zinc oxide, 1～3 part of stearic acid, 1～5 part of anti-aging agent, 1～3 part of dispersion agent, 15～30 portions of strengthening agents, 1～10 part of modifying aramid fiber staple fibre, 1～10 part of tenderizer, 15～60 portions of strengthening agents, mixing 15～20min, melting temperature is 40～60 ℃, namely obtains one section rubber unvulcanizate after parking 12～16h;
(2) two-stage mixing: add 1～2.5 part of sulphur, 1～2.5 part of promotor in the one section rubber unvulcanizate that obtains to step (1), mixing 3～6min, melting temperature is 40～60 ℃, obtains primer;
(3) primer that step (2) is obtained vulcanizes on vulcanizing press, and curing temperature is 140～150 ℃, and sulfide stress is 10～15MPa, and curing time is 20～40min, obtains described energy-conservation conveying belt primer.
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| CN109134955A (en) * | 2018-06-20 | 2019-01-04 | 宁国市瑞普密封件有限公司 | A kind of natural rubber products of high stretching strength |
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| CN117089129A (en) * | 2023-10-18 | 2023-11-21 | 广州顶顺机电设备有限公司 | Composite material containing aramid fiber, preparation method thereof and conveyor belt using composite material |
| CN117089129B (en) * | 2023-10-18 | 2024-01-05 | 广州顶顺机电设备有限公司 | Composite material containing aramid fiber, preparation method thereof and conveyor belt using composite material |
| CN117903505A (en) * | 2024-01-18 | 2024-04-19 | 山东盛海橡胶有限公司 | Aramid tire tread rubber and preparation method thereof |
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