CN103131061B - 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 quantity, 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 operational safety, easy to use, be easy to the advantage safeguarded, and serialization, long distance transportation can be realized, thus 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 required for vast industry.But, along with conveying belt lengthening, widen, the power capacity consumed in its operation work is also in continuous increase.When current energy consumption constantly increases, Energy resources are in short supply all the more, the energy-conservation conveying belt of researchdevelopment has become inexorable trend.
From enterprise's angle, by conveying belt in use energy-saving consumption-reducing, can cut operating costs, improve Business Economic Benefit, strengthen enterprise competitiveness.Meanwhile, respond the cry of global energy-saving and environmental protection, the research and development of energy-conservation conveying belt, production and popularization, correspondingly can improve the competitive capacity of conveying belt enterprise.In its over-all properties of guarantee simultaneously, the energy saving of research and development conveying belt, improves its production technique, releases the energy-conservation conveying belt of stable performance, treats technical maturity, be expected to product promotion to world market.
From the angle of long-range and macroscopic view; energy-conservation conveying belt reduces power consumption, if things go on like this, can alleviate the situation of Energy resources demand anxiety; reduce and consume the immense pressure brought to environment of the energy, for realizing Sustainable development, fall dirtyly to reduce discharging, protection of the environment has 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 aspect, namely realizes the lightweight of conveying belt from structure, reduces the dissipation factor tan δ of conveying belt from formula.Dissipation factor tan δ (out-of-phase modulus and Young's modulus ratio) is very important physical quantity, and it is used to the important parameter characterizing viscoelastic material power loss (hysteresis loss).Reduce tan δ, mean the energy that can reduce the loss of sizing material internal friction institute, the corresponding power consumption reducing conveying belt, reaches energy-conservation object.
Sweden Zhuo Er fort company uses high strength, high-modulus, light-weighted aramid fiber as 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 stability, minimizing maintenance load that conveying belt runs simultaneously, be conducive to the carrying of conveying belt, installation and removal.But the cost of aramid fiber, compared to other framework materials, costly, is thus restricted in popularization and practical application.
2005, Liu pioneer with NR/SBR paralled system for benchmark, use solid lubricant mica powder or talc sizing material, using transition metal complex Cd (BDTC) 2Py as promotor, frictional coefficient (the Liu pioneer of cross-linked rubber can be reduced, the research of energy-saving conveying belt NR/SBR matrix material, South China Science & Engineering University's Master's thesis, 2005).More than in research, reduced the frictional coefficient of cross-linked rubber by formulating of recipe.But, compared with conventional formulation, employ the non-common Synergist S-421 95 such as modifier A, diatomaceous earth filler, and the transition metal complex used needs extra synthesis.Its cost visible is higher, and the actual possibility promoted is little.
Goal of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of energy-conservation conveying belt primer, 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, component ratio by mass number meter: 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;
Add after natural rubber and synthetic rubber plasticate in two roller mill, add zinc oxide, stearic acid, anti-aging agent, dispersion agent, strengthening agent, modifying aramid fiber staple fibre, tenderizer successively, park after mixing and obtain one section of rubber unvulcanizate; In one section of rubber unvulcanizate, add sulphur, promotor is carried out mixing; Carry out sulfuration 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 is, comprises the following steps, component ratio by mass number meter:
(1) one section mixing: in two roller mill, add 40 ~ 100 parts of natural rubbers and 10 ~ 60 parts of synthetic rubber, plasticate 30 ~ 50s, and plasticating temperature is 25 ~ 30 DEG C; Then 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, 30 ~ 60 portions of strengthening agents, 1 ~ 10 part of modifying aramid fiber staple fibre, 1 ~ 10 part of tenderizer is added successively, mixing 15 ~ 20min, melting temperature is 40 ~ 60 DEG C, namely obtains one section of rubber unvulcanizate after parking 12 ~ 16h;
(2) two-stage mixing: add 1 ~ 2.5 part of sulphur, 1 ~ 2.5 part of promotor, mixing 3 ~ 6min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 40 ~ 60 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 140 ~ 150 DEG C, 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 modifying aramid fiber staple fibre to add in sizing material, effectively can reduce sizing material heat-dissipating, reduce its hysteresis loss, obtain the energy-conservation conveying belt primer with low-friction coefficient;
(2) adopt a small amount of modifying aramid fiber staple fibre and a large amount of carbon black and be used as infill system, while keeping the every physical and mechanical properties of sizing material, improve wear resistance.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Natural rubber in rubber matrix of the present invention adopts emulsion flocculence to prepare, and natural rubber has self-enhancement, has higher mechanical strength, there is good flexible resistance simultaneously, hysteresis loss is little, and heat-dissipating 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 the surface modifying material of aramid fiber short fibre through chemical reagent surface active, is joining in sizing material as strengthening agent together with carbon black; Modifying aramid fiber staple fibre adds in sizing material, due to its surface modification, easily and the filler generation interaction such as carbon black, decrease the effect between filler, thus reduce the internal friction heat-dissipating of sizing material, effectively can reduce the hysteresis loss of sizing material, reduce heat-dissipating, reduce the rolling resistance of sizing material, realize energy-conservation object; But the number of modifying aramid fiber staple fibre must not more than 10 parts, and number increase can affect the physical and mechanical propertiess such as the tensile strength of sizing material.The modifying aramid fiber staple fibre that the embodiment of the present invention uses is purchased from Japanese Teijin Ltd.
Anti-aging agent of the present invention is Microcrystalline Wax (being separated from the residual oil still kettle by the solvent separation of series of complex), 2,2,4-trimethylammonium-1,2-dihyaroquinoline polymer (anti-aging agent RD), N-(1,3-dimethylbutyl) one or more in-N'-diphenyl-para-phenylene diamine (antioxidant 4020), acetone and pentanoic pyrocondensation thing (antioxidant BLE), good thermo oxidative aging, ozone-resistant aging resistance can be provided for rubber item.
Described tenderizer is one or more in petroleum softening agent, pine tar system softening agent, coal tar system 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 to goal of the invention of the present invention produce and limit.
Stearic acid of the present invention is not specifically limited, and only otherwise to goal of the invention of the present invention produces and limits; The stearic acid adopted in the embodiment of the present invention derives from Sheng Da Chemical Co., Ltd. of Danyang City.
Described dispersion agent of the present invention is not specifically limited, and only otherwise to goal of the invention of the present invention produces and limits; The dispersion agent adopted in the embodiment of the present invention is dispersion agent FS-12.
Invention also provides the preparation method of energy-conservation conveying belt primer, rubber processing method traditionally, each component beyond vulcanisation system (sulphur, promotor) is mixed in mill or Banbury mixer and obtains one section of rubber unvulcanizate, after parking 12 ~ 16 hours, then add vulcanization system and carry out two-stage mixing; After the two-stage mixing glue of acquisition is parked for some time, forcing machine carries out extrude slice and obtain conveying belt primer film; At normal temperatures, primer, adhesive glue and framework material are carried out composite molding on four-roll calender; Band embryo after shaping is carried out sulfuration on vulcanizing press, sulfurizing temperature range at 140 ~ 150 DEG C, sulfide stress at 10 ~ 15MPa, curing time 20 ~ 40min; Band embryo after sulfuration, after cold formed, just can obtain corresponding product.
Embodiment 1: a kind of preparation method of energy-conservation conveying belt primer, comprises the following steps:
(1) one section mixing: in two roller mill, add 450g natural rubber and 50g styrene-butadiene rubber(SBR), plasticate 40s, and plasticating temperature is 25 DEG C; Then 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 is added successively, mixing 17min, melting temperature is 40 DEG C, namely obtains one section of rubber unvulcanizate after parking 12h;
(2) two-stage mixing: add 5g sulphur, 5g accelerator NS, mixing 4min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 50 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 170 DEG C, 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: in two roller mill, add 400g natural rubber and 100g cis-1,4-polybutadiene rubber, plasticate 35s, and plasticating temperature is 25 DEG C; Then 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 is added successively, mixing 20min, melting temperature is 45 DEG C, namely obtains one section of rubber unvulcanizate after parking 14h;
(2) two-stage mixing: add 10g sulphur, 5g accelerator NS, 5g accelerant CZ, mixing 5min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 55 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 155 DEG C, 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: in two roller mill, add 300g natural rubber, 100g styrene-butadiene rubber(SBR) and 100g cis-1,4-polybutadiene rubber, plasticate 50s, and plasticating temperature is 30 DEG C; Then 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 is added successively, mixing 15min, melting temperature is 50 DEG C, namely obtains one section of rubber unvulcanizate after parking 16h;
(2) two-stage mixing: add 12.5g sulphur, 5g vulkacit D TDM, 7.5g part accelerator NS in one section of rubber unvulcanizate that step (1) obtains, mixing 3min, melting temperature is 40 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 140 DEG C, 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: in two roller mill, add 40g natural rubber and 10g styrene-butadiene rubber(SBR), plasticate 30s, and plasticating temperature is 30 DEG C; Then 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 is added successively, mixing 15min, melting temperature is 60 DEG C, namely obtains one section of rubber unvulcanizate after parking 12h;
(2) two-stage mixing: add 1g sulphur, 1g Vulcanization accelerator TMTD, mixing 3min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 60 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 140 DEG C, 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: in two roller mill, add 100g natural rubber and 60g cis-1,4-polybutadiene rubber, plasticate 50s, and plasticating temperature is 25 DEG C; Then 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 is added successively, mixing 20min, melting temperature is 40 DEG C, namely obtains one section of rubber unvulcanizate after parking 16h;
(2) two-stage mixing: add 2.5g sulphur, 2.5g vulkacit D TDM, mixing 6min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 40 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 150 DEG C, and sulfide stress is 10MPa, and curing time is 20min, obtains described energy-conservation conveying belt primer.
Comparative example 1:
In two roller mill, add 450g natural rubber and 50g styrene-butadiene rubber(SBR) (SBR1712) to plasticate at 25 DEG C 45s, then 5g zinc oxide is added successively, 5g stearic acid, 5g Microcrystalline Wax, 5g dispersion agent FS-12, 50g carbon black N115, 5g transformer oil, 100g carbon black N330, carry out once mixing, melting temperature 60 DEG C, 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 on a mill until and obtain two-stage mixing glue, melting temperature 60 DEG C, mixing 6min, sulfuration 30min on vulcanizing press, curing temperature 160 DEG C, sulfide stress is 13MPa, obtain described energy-conservation conveying belt primer, the physical and mechanical properties of this primer is in table 1, and tan δ value is in table 2.
Measuring method of the present invention is according to following standard:
The physical and mechanical properties testing method of conveying belt primer carrys out the mechanical property of test compound material by ASTMD412 standard; Stretching experiment adopts the wide cut-off knife dumbbell plate of 6.00mm without exception, tears and tests as perpendicular type tears sample; Draw speed is 500mm/min, and probe temperature is 25 DEG C; Other performance tests have all come according to ASTM standard.
Table 1: the Performance comparision of the embodiment of the present invention 1 ~ 3, comparative example 1
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 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 example 1 tan δ value at 60 DEG C
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | |
| tanδ | 0.31 | 0.32 | 0.34 | 0.36 |
As shown in table 1, survey embodiment 1 ~ 3 primer physical and mechanical properties be tensile strength>=16.0MPa, tensile yield>=450%, angle tear strength>=30KN/m, cylinder wear(ing)value≤120mm
3, hardness 60-75A (Shao Er).
By the Performance comparision of embodiment 1 ~ 3, comparative example 1, can find out, the primer tan δ value adding modification virtue wheel staple fibre all has obvious reduction.The primer of embodiment 1, its every physical and mechanical properties is all obviously better than other embodiments.Energy-conservation primer is while maintenance properties in the present invention, reduces tan δ value, can realize the object that conveying belt is energy-conservation.
Claims (1)
1. the preparation method of an energy-conservation conveying belt primer, comprise following component, component ratio by mass number meter: 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;
It is characterized in that, comprise the following steps:
(1) one section mixing: in two roller mill, add 40 ~ 100 parts of natural rubbers and 10 ~ 60 parts of synthetic rubber, plasticate 30 ~ 50s, and plasticating temperature is 25 ~ 30 DEG C; Then 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, 30 ~ 60 portions of strengthening agents, 1 ~ 10 part of modifying aramid fiber staple fibre, 1 ~ 10 part of tenderizer is added successively, mixing 15 ~ 20min, melting temperature is 40 ~ 60 DEG C, namely obtains one section of rubber unvulcanizate after parking 12 ~ 16h;
(2) two-stage mixing: add 1 ~ 2.5 part of sulphur, 1 ~ 2.5 part of promotor, mixing 3 ~ 6min in one section of rubber unvulcanizate that step (1) obtains, melting temperature is 40 ~ 60 DEG C, obtains primer;
(3) primer that step (2) obtains is carried out sulfuration on vulcanizing press, curing temperature is 140 ~ 150 DEG C, and sulfide stress is 10 ~ 15MPa, and curing time is 20 ~ 40min, obtains described energy-conservation conveying belt primer.
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Address after: 214112 Wuxi, New District, Jiangsu Mei Village Road, No. 19 Patentee after: WUXI BOTON TECHNOLOGY CO., LTD. Patentee after: Beijing University of Chemical Technology Address before: 214112 Wuxi, New District, Jiangsu Mei Village Road, No. 19 Patentee before: Wuxi Baotong Tape Industry Co., Ltd, Patentee before: Beijing University of Chemical Technology |
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