CN105670060A - Passenger rail line rubber pad - Google Patents

Abstract

The invention relates to a train rail laying technology, and specifically relates to a passenger rail line rubber pad. According to the technical scheme provided by the invention, the rubber pad comprises, by weight, 100 parts of styrene-butadiene rubber, 4-8 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 0.8-1.5 parts of an accelerator TMTD, 0.5-1.5 parts of an accelerator CZ, 0.5-1.5 parts of an accelerator DTDM, 1.0-3.0 parts of a coupling agent Si69, 30-50 parts of semi-reinforcing carbon black, 50-70 parts of nano-grade kaolin, 10-20 parts of nano-grade calcium carbonate, 1-1.5 parts of an anti-aging agent 4010NA, 1-2 parts of an anti-aging agent RD, 0.5-1.5 parts of microcrystalline wax, and 0.3-1.5 parts of sulfur. According to the invention, the high-performance novel materials nano-grade kaolin and nano-grade calcium carbonate are selected as components, such that the performances of the rubber pad reach the technical requirements of a passenger rail line rubber pad. The rubber pad has higher insulation performance and higher anti-aging performance. With the rubber pad, a product has lower dynamic-to-static stiffness ratio.

Description

Rubber backing plate of passenger dedicated line

Technical field

The present invention relates to the laying technology of a kind of train rail, specifically a kind of rubber backing plate of passenger dedicated line.

Background technology

Modern railways operational mode is taking high speed, high-density as basic model, and this kind of pattern needs railway to provide satisfactory stability and rational circuit elasticity, and possesses the feature of few maintenance. Therefore, railway basis is to rigidization development, and rail develops to heavy-duty, and this trend requires that circuit provides better elasticity. And the circuit elasticity of necessity, then it is alleviate rail abrasion, keeps circuit to stablize, to adapt to vehicle high-speed degree, highdensity requirement, buffering wheel track stress, keeps joint level, and the elongate member life-span, institute was necessary. Rubber tie plate under rail is parts the most important in elastic rail fastener, which is responsible slow down from rail vibration, relax wheel-rail impact, dispersion wheel load effect, stop rail creep, increase many functions such as track insulation. In addition, rubber tie plate under rail be again in-orbit under directly bear the power actuated parts of train load, load directly affects its working order on being all delivered under rail foundation structure via rubber pad placed under-neath rail. From the shape size of rubber pad placed under-neath rail, it respectively forms in parts at track is that working conditions is the harshest, deteriorates the fiercest parts.

Traditional rubber bearing generally all performs Ministry of Railways industry standard TB/T2626 1995, it is adapted to the existing common railway that desin speed is 120km/h, the technical requirements of this rubber private school plate is compared with the technical requirements of rubber backing plate of passenger dedicated line, first it is that the ageing-resistant requirement of product is lower, aging condition be 100 DEG C of X72h, product working resistance be only San 106, secondly the technical requirements of rubber backing plate of passenger dedicated line rubber bearing do not had springrate ratio and 3,000,000 fatigue tests, these technical requirementss in 5 year work-ing life by 95 standards yet, so can not be adapted to.

Summary of the invention

It is an object of the invention to design a kind of rubber backing plate of passenger dedicated line, by selecting high performance type material nanometer ridge soil and nano-calcium carbonate in composition, make the performance of rubber bearing reach the technical requirements of rubber backing plate of passenger dedicated line, there is the springrate ratio that higher insulativity, higher ageing resistance and product are lower.

According to technical scheme provided by the invention, described rubber bearing comprises: described rubber bearing comprises: styrene-butadiene rubber(SBR), 100 parts;Zinc oxide, 4～8 parts; Stearic acid part, 0.5～1.5 part; Vulcanization accelerator TMTD, 0.8～1.5 part; Promote neat IJCZ, 0.5～1.5 part; Vulkacit D TDM, 0.5～1.5 part; Neat Si691.0～3.0 part of coupling; Semi-reinforcing hydrocarbon black, 30～50 parts; Nanometer office ridge soil, 50～70 parts; Nano-calcium carbonate mother, 10～20 parts; Antioxidant 4010NA, 1～1.5 part; Anti-aging agent RD, 1～2 part; Microcrystalline Wax, 0.5～1.5 part; Sulphur, 0.3～1.5 part; Unit is weight part.

2, the production method of a kind of rubber backing plate of passenger dedicated line, it is characterised in that, described method comprises the steps:

(1), plasticate: 100 parts of styrene-butadiene rubber(SBR) are plasticated on a mill until, is then divided into examination paper; After plasticating, various Synergist S-421 95 is conducive to join in styrene-butadiene rubber(SBR) and make it mix; (2), mixing: feeding sequence time mixing is:

First above-mentioned examination paper is put into Banbury mixer mixing, 1～2 minute time;

The coarse fodder of 1/2 is put into again, mixing time 1～2 minute in described Banbury mixer;

Put into remaining 1/2 coarse fodder again, mixing time 1～2 minute;

Described coarse fodder comprises: semi-reinforcing hydrocarbon black 30～50 parts, nano kaoline 50～70 parts, nano-calcium carbonate 10～20 parts;

Put into coupling agent Si691.0～3.0 part again, mixing time 1～2 minute;

Put into little material again, mixing time 1～2 minute; Described little material comprises: 4～8 parts, zinc oxide, stearic acid 0.5～1.5 part, antioxidant 4010NA 1～1.5 part, anti-aging agent RD 1～2 part, Microcrystalline Wax 0.5～1.5 part, forms blend glue stuff;

Then above-mentioned blend glue stuff is stirred, 1～2 minute time;

Discharge above-mentioned blend glue stuff after stirring;

Blend glue stuff by above-mentioned discharge puts into mill again, and adds 0.3～1.5 part, sulphur, Vulcanization accelerator TMTD 0.8～1.5 part; Promote neat IJCZ0.5～1.5 part; Promote neat UDTDM0.5～1.5 part, formed and add sulphur glue;

Mixing effect is in Banbury mixer by various blend glue stuff evenly be mixed in styrene-butadiene rubber(SBR);

(3), Hui Lian: adding after sulphur glue parks 18～30 hours, then returning refining on a mill until and go out film all afterwards; In parking period, various Synergist S-421 95 still can continue diffusion in styrene-butadiene rubber(SBR), thus improves the dispersing uniformity of Synergist S-421 95 in styrene-butadiene rubber(SBR);

(4), sulfuration: the mould sulfidization molding that above-mentioned film is put into vulcanizer; Curing temperature 160～170 DEG C; Curing time 8～12 minutes; Sulfide stress 14～16MPa;

Add the styrene-butadiene rubber(SBR) in sulphur glue and sulphur generation chemical reaction, rubber molecule becomes tridimensional network by linear structure is crosslinked, the rubber that rubber can flow greatly from plasticity height, viscosity turns into having the rubber item of favorable elasticity and hardness, and other physical and mechanical properties also has a very large change.

Unit is weight part.

Wherein, styrene-butadiene rubber(SBR) has wear-resisting, and distortion heat-dissipating is low, and the features such as rebound resilience is higher, good weatherability are the base mateirals of the present invention.

The thread-like molecule of rubber by crosslinking reaction, is made it to become the bodily form molecule of tridimensional network, thus makes rubber become cross-linked rubber, and the Physical and mechanical properties of cross-linked rubber greatly improves, and has had the actual value of engineer applied by the effect of sulphur.

Promotor comprises TMTD, DTDM and CZ, promotor can the crosslinking reaction of accelerated stock, can obviously shorten curing time, reduce curing temperature, reduce the consumption of vulcanizing agent.

Zinc oxide and stearic acid can increase the activity of vulcanization accelerator, it is to increase vulcanization rate and sulfuration efficiency, improve cured properties. Anti-aging agent comprises 4010NA, RD and Microcrystalline Wax, and anti-aging agent can prevent the aging of rubber, extends the work-ing life of rubber stock goods.Strengthening agent semi-reinforcing hydrocarbon black, nano kaoline and nano-calcium carbonate mother can improve the Physical and mechanical properties of rubber item. Coupling agent Si69 can make the surface adsorption of white strengthening agent decline, and increases the consistency of the organic polymer such as strengthening agent and rubber simultaneously.

It is an advantage of the invention that. with rubber bearing owing to the physical property of product there being working resistance be greater than the requirement of 108Q under passenger dedicated railway line sleeper, so just can not be multiplex as the strengthening agent carbon black in sizing material, originally this kind of formula, except black-reinforced, all adopts white carbon black to carry out the requirement of additional properties. But Line for Passenger Transportation rubber bearing is higher to the requirement of the ageing-resistant of product and sound steel degree ratio, thus with white carbon black as a supplement strengthening agent can not meet the requirement of product. Present invention employs type material nano kaoline and nano-calcium carbonate.

Nano kaoline is owing to particle size is little, specific surface area big, have very strong surface effects, dimensional effect and macro quanta tunnel effect. Nanoparticle and polymkeric substance compound, be possible not only to significantly improve the intensity of polymkeric substance, rigidity and toughness, it is also possible to increases the functional performances such as the barrier of polymkeric substance, thermotolerance and resistance to deterioration.

Nano kaoline crystal is thin slice shape. Nano kaoline/rubber composite has good thermal stability, it is because potter's clay lamella is arranged in parallel in the form of sheets in the composite on the one hand, rubber molecule is interspersed between potter's clay lamella, part macromole is directly connected with lamella, wherein there is strong interaction, clay layer is equivalent to cross-linking set; Potter's clay lamella has good barrier properties energy on the other hand, and the decomposition of rubber macromolecule therebetween is suppressed, thus improves the thermal stability of matrix material. According to data introduction, the initial weightless temperature of nano kaoline/rubber composite relatively white carbon black/rubber composite improve 20～45 DEG C, terminate degradation temperature and improve 50～90 DEG C, this illustrates that nano kaoline more can improve the thermostability of rubber than white carbon black. This conclusion have also been obtained confirmation in our rubber bearing test recipe.

Secondly, formula is filled with a small amount of nano-calcium carbonate, after rubber is filled a small amount of nanoparticle, the network structure being jointly made up of filler and rubber can be formed. Wherein the characteristic sum stress/strain behavior of this network structure is had important impact by filler/filler effect and filler/rubber effect. And these two kinds effects and filling surface characteristic direct correlation. Two kinds of fillers that surface property is different used time, the interaction between different filler grain can affect the networking of filler in polymeric matrix, and then affects the dynamic property of filling and vulcanization glue. Two kinds of fillers and with after being dispersed in rubber, owing to isolating mutually in rubber matrix, the difference of surface property causes network " doping " effect, thus obviously weaken the network structure that single powder body is formed, therefore the dynamic lag phenomenon of filled rubber cross-linked rubber is made to weaken, also namely in-fighting reduces, and elasticity increases. Thus effectively reduce the springrate ratio of product.

Embodiment

Unit in following embodiment is weight part.

Embodiment one:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 4; Stearic acid 1.5; Vulcanization accelerator TMTD 1.2; Accelerant CZ 1.2; Vulkacit D TDM0.5; Coupling agent Si691.5; Semi-reinforcing hydrocarbon black 30; Nano kaoline 70; Nano-calcium carbonate 20; Antioxidant 4010NA 1.5; Anti-aging agent RD 2; Microcrystalline Wax 1;Sulphur 1; Add up to 235.4.

Production method is as follows:

(1), plasticate. 100 parts of styrene-butadiene rubber(SBR) are plasticated in mill, is then divided into bulk as requested, then is wound into examination paper;

(2), mixing: feeding sequence time mixing is:

First above-mentioned examination paper is put into Banbury mixer more mixing, 1～2 minute time;

The coarse fodder of 1/2 is put into again, mixing time 1～2 minute in described Banbury mixer;

Put into remaining 1/2 coarse fodder again, mixing time 1～2 minute;

Described coarse fodder comprises: semi-reinforcing hydrocarbon black 30 parts; Nano kaoline 70 parts; Nano-calcium carbonate 20 parts; Put into coupling agent Si691.5 part again, mixing time 1～2 minute;

Put into little material again, mixing time 1～2 minute; Described little material comprises: 4 parts, zinc oxide, stearic acid 1.5 parts, antioxidant 4010NA 1.5 parts, anti-aging agent RD 12 parts, Microcrystalline Wax 1 part; Form blend glue stuff; Then above-mentioned blend glue stuff is stirred, 1～2 minute time; Then above-mentioned blend glue stuff after stirring is discharged in Banbury mixer;

1 part, sulphur, Vulcanization accelerator TMTD 1.2 parts is added again on a mill until in the blend glue stuff of above-mentioned discharge; Accelerant CZ 1.2 parts; Vulkacit D TDM0.5 part, is formed and adds sulphur glue;

(3), Hui Lian:; Adding after sulphur glue parks 18～30 hours, on a mill until, return refining and go out film all afterwards;

(4), sulfuration: the mould sulfidization molding that above-mentioned film is put into vulcanizer, curing temperature 160～170 DEG C; Curing time 8～12 minutes; Sulfide stress 14～16MPa.

(5), formula technique performance

Note: aging condition is: 100 DEG C × 96h.

Embodiment two:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 5; Stearic acid 0.5; Vulcanization accelerator TMTD 0.8; Accelerant CZ 0.7; Vulkacit D TDM0.7 coupling agent Si691.0; Semi-reinforcing hydrocarbon black 40; Nano kaoline 50; Nano-calcium carbonate 15; Antioxidant 4010NA 1.0; Anti-aging agent RD 1.0; Microcrystalline Wax 0.5; Sulphur 1.2; Add up to 236.5. Production technique and technical feature are with embodiment one.

Embodiment three:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 6; Stearic acid 1.5; Vulcanization accelerator TMTD 1.4; Accelerant CZ 0.5; Vulkacit D TDM0.9; Coupling Si692.0; Semi-reinforcing hydrocarbon black 50; Nano kaoline 60; Nano-calcium carbonate 12; Antioxidant 4010NA 1.2; Anti-aging agent RD 1.5; Microcrystalline Wax 0.8; Sulphur 0.6; Add up to 236.1.

Production technique and performance are with embodiment one.

Embodiment four:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 8; Stearic acid 0.7; Vulcanization accelerator TMTD 1.0; Accelerant CZ 0.8; Vulkacit D TDM1.1; Coupling agent Si692.5; Semi-reinforcing hydrocarbon black 35; Nano kaoline 62; Nano-calcium carbonate 17; Antioxidant 4010NA 1.3; Anti-aging agent RD 1.7; Microcrystalline Wax 1.2; Sulphur 0.6; Add up to 239.6.

Production technique and performance are with embodiment one embodiment five:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 7; Stearic acid 1.2; Vulcanization accelerator TMTD 1.0; Accelerant CZ 1.0; Vulkacit D TDM1.3; Coupling agent Si691.7; Semi-reinforcing hydrocarbon black 45; Nano kaoline 62; Nano-calcium carbonate 17; Antioxidant 4010NA 1.3; Anti-aging agent RD 1.7; Microcrystalline Wax 1.2; Sulphur 0.8; Add up to 235.9. Production technique and performance are with embodiment one.

Embodiment six:

Styrene-butadiene rubber(SBR) 100; Zinc oxide 5; Stearic acid 1; Vulcanization accelerator TMTD 1.5; Accelerant CZ 1.5; Vulkacit D TDM1.5; Coupling agent Si693.0; Semi-reinforcing hydrocarbon black 50; Nano kaoline 55; Nano-calcium carbonate 19; Antioxidant 4010NA 1.5;Anti-aging agent RD 1.2; Microcrystalline Wax 1; Sulphur 0.3; Add up to 236.4. Production technique and performance are with embodiment one.

Claims (2)

1. a rubber backing plate of passenger dedicated line, is characterized in that: described rubber bearing comprises: styrene-butadiene rubber(SBR), 100 parts; Zinc oxide, 4～8 parts; Stearic acid part, 0.5～1.5 part; Vulcanization accelerator TMTD, 0.8～1.5 part; Accelerant CZ, 0.5～1.5 part; Vulkacit D TDM, 0.5～1.5 part; Coupling agent Si691.0～3.0 part; Semi-reinforcing hydrocarbon black, 30～50 parts; Nano kaoline, 50～70 parts; Nano-calcium carbonate, 10～20 parts; Antioxidant 4010NA, 1～1.5 part; Anti-aging agent RD, 1～2 part; Microcrystalline Wax, 0.5～1.5 part; Sulphur, 0.3～1.5 part; Unit is weight part.

2. the production method of a rubber backing plate of passenger dedicated line, it is characterised in that, described method comprises the steps:

(1), plasticate: 100 parts of styrene-butadiene rubber(SBR) are plasticated in mill, then it is divided into bulk as requested, then is wound into examination paper;

(2), mixing: feeding sequence time mixing is:

First above-mentioned examination paper is put into Banbury mixer mixing;

Put in described Banbury mixer again 1/2 coarse fodder mixing;

Put into remaining 1/2 coarse fodder more mixing;

Described coarse fodder comprises: semi-reinforcing hydrocarbon black 30～50 parts; Nanometer 50～70 parts, office's ridge soil; Nano-calcium carbonate Wei beggar 10～20 parts;

Put into coupling agent Si691.0～3.0 part more mixing;

Put into little material more mixing; Described little material comprises: 4～8 parts, zinc oxide, stearic acid 0.5～1.5 part, antioxidant 4010NA 1～1.5 part, anti-aging agent RD 1～2 part, Microcrystalline Wax 0.5～1.5 part; Form blend glue stuff;

Then above-mentioned blend glue stuff is stirred;

Discharge above-mentioned blend glue stuff after stirring;

Again the mixing stock material of above-mentioned discharge is put into mill, and add sulphur 0.3～1.5 part, Vulcanization accelerator TMTD 0_8～1.5 part;

Accelerant CZ 0.5-L5 part; Vulkacit D TDM0.5～1.5 part, are formed and add sulphur glue;

(3), Hui Lian: adding after sulphur glue parks 18～30 hours, on a mill until, go out film after returning refining evenly;

(4), sulfuration: the mould sulfidization molding that above-mentioned film is put into vulcanizer; Curing temperature 160～170 DEG C; Curing time 8～12 minutes; Sulfide stress 14～16MPa;

Unit is weight part.