Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby provide a kind of high temperature-resistance conveyor belt, it has freedom from cracking ageing properties, the excellent abrasive energy of excellent heat aging property, excellence, can significantly improve the service life in high temperate zone and the environmental pollution of avoiding operation field to cause owing to the load-transfer device reason, satisfy the conveying requirement of industry high-temperature materials such as iron and steel, cement, solved the not high big problem of high-temperature material transport efficiency.
The main solution of the present invention is achieved in that
The present invention mainly adopts and be provided with belt carcass tension element canvas between driving surface rubber cover and non-working surface rubber cover, makes them securely in conjunction with as a whole by moulding and vulcanization process.
Driving surface rubber cover of the present invention its form and proportioning by umber:
A, binary second third glue: 80~100 parts;
B, ethylene-propylene diene copolymer: 0~20 part;
C, crosslinking agent are got cumyl peroxide (DCP-40): 4~8 parts;
D, assistant crosslinking agent are got cyanacrylate (TAIC): 1~3 part;
E, thermal conducting agent are got zinc oxide: 5~30 parts;
F, reinforcing agent 1 are got carbon black (N300): 20~60 parts;
G, reinforcing agent 2 are got carbon black (N500): 20-50 part;
H, soften flux 1 are got paraffin oil (SUNPAR2280): 10~40 parts:
I, soften flux 2 are got Liquid Ethylene Propylene Methylene: 5-20 part;
J, aging inhibitor 1 are got (RD) 2,2,4-trimethyl-1,2-dihyaroquinoline polymer: 1~4 part;
K, aging inhibitor 2 are got (1010) [β-(3 ', the 5-di-t-butyl-4 ' hydroxy phenyl) propionic acid] pentaerythritol ester of getting four: 1~4 part;
L, aramid fiber short fibre are got: 1~15 part.
The present invention at first binary second third glue or binary second third glue and ethylene-propylene diene copolymer are added the Banbury mixer precompressed mixing after, add thermal conducting agent, aging inhibitor carries out mixing again; Add reinforcing agent, soften flux, aramid fiber short fibre again and carry out mixingly, be processed into one section elastomeric compound (or claiming rubber master batch); Add again after above-mentioned rubber master batch is parked Banbury mixer continue mixing, add again crosslinking agent and assistant crosslinking agent through mixing even after binder removal, be processed into finished composition; And then above finished composition rolled into film through heat refining; Film and tension element canvas made-up belt assembly, through roll sulfuration, finishing verifies as finished product.
Aramid fiber short fibre portrait orientation in the sizing material of the present invention is arranged.
Aramid fiber short fibre length of the present invention is got: 1-8mm.
The film THICKNESS CONTROL is at 4.5~10mm during rolling out film of the present invention.
Compared with the prior art the present invention has the following advantages:
1, the binary second third rubber cover Good Heat-resistance, the time that occurs aging cracking when carrying high-temperature material is delayed greatly, and the high-tenacity aramid fiber short fibre of portrait orientation arrangement is simultaneously assisted binary second third rubber cover obviously to delay or is reduced the be full of cracks that aging back occurs; Industry such as iron and steel, cement operation field environmental working condition is greatly improved; 2, the powerful extra-high-speed of aramid fiber short fibre, the high-tenacity loss below 300 ℃ is little, and load-transfer device aramid fiber short fibre when carrying high-temperature material can not rupture substantially, therefore gives rubber cover excellent abrasive energy, and this has solved rubber cover not abrasion resistant problem at high temperature; 3, practical life were carried 1~4 times after described high temperature-resistance conveyor belt adopted above prescription and technology than originally; 4, can significantly improve service life in high temperate zone and avoid operation field, satisfy the conveying requirement of industry high-temperature materials such as iron and steel, cement owing to the environmental pollution that the load-transfer device reason causes.
The specific embodiment:
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
Embodiment one: high temperature-resistance conveyor belt production technology of the present invention is as follows:
High temperature-resistance conveyor belt of the present invention adopts and be provided with belt carcass tension element canvas between driving surface rubber cover and non-working surface rubber cover, makes them securely in conjunction with as a whole by moulding and vulcanization process.
The described driving surface rubber cover of the embodiment of the invention its form and proportioning by umber:
1, rubber mixing-milling technique:
A, one section calendering process:
The precompressed of 100 parts of adding Banbury mixeies of binary second third glue is mixing, mixing time: 28~32 seconds; Add fines: thermal conducting agent is got 10 parts in zinc oxide, anti-ageing agent 1:RD, formal name used at school: 2,2,4-trimethyl-1,2-dihyaroquinoline polymer: 2 parts, anti-ageing agent 2:1010, formal name used at school, four [β-(3 ', 5-di-t-butyl-4 ' hydroxy phenyl) propionic acid] pentaerythritol ester: 2 parts, mixing time: 28~32 seconds; And then in sizing material, add reinforcing agent 1 carbon black: specification N330,20 parts; Reinforcing agent 2 carbon blacks: specification N550:40 part, soften flux 1 paraffin oil: specification SUNPAR2280,35 parts, soften flux 2 Liquid Ethylene Propylene Methylene: 12 parts and aramid fiber short fibre: 5 parts, proceed mixing, mixing time: 55~65 seconds; Discharge when melting temperature reaches 155~165 ℃ is processed into masterbatch.Cool off after 4~6 hours, masterbatch carries out two-stage mixing.Thermal conducting agent zinc oxide can improve the permeability of heat of rubber cover; Anti-ageing agent can improve heat resistanceheat resistant oxygen performance; The reinforcing agent carbon black can improve strength and extension property and wear resisting property and improve shop characteristic; Soften flux can improve resistance to heat, also can improve shop characteristic; Aramid fiber short fibre length is got 1-8mm, can significantly improve wear resisting property and freedom from cracking performance.
B, two-stage mixing process:
Masterbatch is added Banbury mixer carry out two-stage mixing, the precompressed mixing time: 28~32 seconds, and then add crosslinking agent: DCP-40, formal name used at school: cumyl peroxide: 8 parts, assistant crosslinking agent: TAIC, formal name used at school: cyanacrylate: 2.5 parts; Binder removal material when melting temperature reaches 95~105 ℃ or mixing time and reaches 2 minutes, it is stand-by to be processed into finished composition.Peroxide cross-linking agent can form the best cross-linked network of resistance to heat; Assistant crosslinking agent can improve crosslink density.
Banbury mixer rotating speed: one section: 32~38r/min; Two sections: 18~22r/min.The banburying fullness coefficient can improve 3~6%.
2, calendering technology:
Above finished composition is put into heat refining in screw extruder or the mill, is fed to then that to carry out rolling out film in the flattening mill stand-by.The film THICKNESS CONTROL is at 4.5~12mm during rolling out film.The sizing material that has gone out film preferably will be incubated or promptly go out i.e. usefulness, in order to avoid sticking when film and belt carcass assembly during moulding.The aramid fiber short fibre portrait orientation that goes out in the film requirement sizing material is arranged.
3, forming process:
Film on make-up machine and the rubberizing canvas made-up belt of forming in advance closely fit together and be shaped to the made-up belt of high temperature-resistance conveyor belt, roll then to park and vulcanized again later in 4 hours.
4, sulfuration process:
The load-transfer device made-up belt of above-mentioned forming is put into carries out step up cure in the vulcanizing press, every plate time of cure is 25~48 minutes, and sulfide stress is 2.5~3.5Kg/cm
2, curing temperature is: 150~155 ℃.
5, finishing, check:
Sulfuration is repaired, is checked after finishing, then the packing warehouse-in.
Embodiment two:
The described driving surface rubber cover of the embodiment of the invention its form and proportioning by umber:
The present invention gets binary second third glue: 90 parts;
Ethylene-propylene diene copolymer: 10 parts;
Crosslinking agent, DCP-40:7 part;
Assistant crosslinking agent, TAIC:2.0 part;
Thermal conducting agent zinc oxide: 15 parts;
Reinforcing agent 1, N330:30 part;
Reinforcing agent 2, N550:30 part;
Soften flux 1, paraffin oil, SUNPAR2280:30 part;
Soften flux 2, Liquid Ethylene Propylene Methylene: 10 parts;
Aramid fiber short fibre: 6.5 parts;
Aging inhibitor 1, RD:2 part;
Aging inhibitor 2,1010:2 part.
Above-mentioned prescription is made the driving surface rubber cover by the processing step of implementing in, adopt and between driving surface rubber cover and non-working surface rubber cover, be provided with belt carcass tension element canvas, make them securely in conjunction with as a whole by moulding and vulcanization process.Sulfuration finishes back finishing check, packing warehouse-in.
Embodiment three:
The described driving surface rubber cover of the embodiment of the invention its form and proportioning by umber:
Binary second third glue: 80 parts;
Ethylene-propylene diene copolymer: 20 parts;
Crosslinking agent, DCP-40:6.6 part;
Assistant crosslinking agent, TAIC:2.0 part;
Thermal conducting agent zinc oxide: 22 parts;
Reinforcing agent 1, N330:35 part;
Reinforcing agent 2, N550:25 part;
Soften flux 1, SUNPAR2280:20 part;
Soften flux 2, Liquid Ethylene Propylene Methylene: 16 parts;
Aramid fiber short fibre: 8 parts;
Aging inhibitor 1, RD:2 part;
Aging inhibitor 2,1010:2 part.
Above-mentioned prescription is made the driving surface rubber cover by the processing step of implementing in, adopt and between driving surface rubber cover and non-working surface rubber cover, be provided with belt carcass tension element canvas, make them securely in conjunction with as a whole by moulding and vulcanization process.Sulfuration finishes back finishing check, packing warehouse-in.