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Rubber composition as rubber pad under rail

A composite material and composition technology, which is applied in the field of rubber composite material composition for under-rail rubber pads, can solve the problems of poor wear resistance and pressure resistance, fast aging, high rigidity, etc., and achieve wear resistance and vibration and noise reduction performance Improved effect

Inactive Publication Date: 2002-09-11
RENTAI IND CHENGDU
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the main problems in the widespread use of 60-10-11 under-rail rubber pads for concrete sleepers are that the rigidity is too large (generally 100-120MN / m), and the aging is fast (the rigidity is generally 150-150MN / m after several months of use). 200MN / m), poor wear resistance and pressure resistance, short service life (the average service life is less than 5 years), and cannot fully exert its buffering and vibration damping effect in the track structure
Although the rigidity can be reduced by using multiple slots, it accelerates the aging and damage of the rubber backing plate

Method used

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  • Rubber composition as rubber pad under rail
  • Rubber composition as rubber pad under rail
  • Rubber composition as rubber pad under rail

Examples

Experimental program
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Embodiment Construction

[0006] specific implementation plan

[0007] figure 1 : Electron Micrograph of ZnO Whiskers

[0008] figure 2 : Electron micrograph of ZnO whiskers after surface treatment with coupling agent

[0009] image 3 : Nano-zinc oxide electron micrograph

[0010] The composition of the base rubber in Examples 1-4 and Comparative Examples 1-3 is, in parts by weight, 70 parts of natural rubber, 20 parts of styrene-butadiene rubber and 10 parts of butadiene rubber. All the other formulations are by weight, as shown in Table 1. The preparation process is: use acetone as a solvent to prepare a 1% solution of titanate coupling agent, put in zinc oxide whiskers, soak for 30 minutes, take it out and dry it, then bake it at 130±5°C for 40 minutes minutes to spare. The natural rubber is masticated with an open mill until the Mooney viscosity is less than 60, and styrene-butadiene rubber, butadiene rubber, fillers and other additives are added in sequence, and after mixing evenly, pre-t...

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Abstract

A composite rubber used as rubbe pad under rail contains matrix rubber 100 portions, promoter 1-5 portions, antiageing agent 1-3 portions, nanometre zinc oxide powder 2-10 portions, sulfurizing agent, 0.2-1.5 portions carbon black 30-60 portions, inorganic filler 30-60 portions, tetra-acicular zinc oxide eshisker 0.5-10 portions and coupling agent 0.2-5 portions. The said matrix rubber consists of natural rubber, styrene-butadiene rubber and cis-1,4-polybutadiene rubber. Its advantages are high static rigidity (50-70 mN / m), tensile strength, antiwear performance, vibration attenuation coefficient and noise-reducing effect.

Description

technical field [0001] The invention relates to a material composition, in particular to an underrail rubber pad rubber composite material composition. Background technique [0002] The prominent problems common to present railway tracks are that the track rigidity is too large and the line elasticity is insufficient, which causes the vibration and noise hazards of the wheel-rail system to become increasingly serious, manifested as early damage to the track, shortened component life, deteriorating line conditions, and high maintenance costs add. At the same time, the vibration-sensitive facilities near the railway line will be damaged, disturbing the environment, and affecting the development of speed-up and high-speed railway. In order to properly solve this problem, domestic and foreign railway experts believe that it is necessary to try to reduce the track stiffness and improve the line elasticity. The usual measure is to install elastic rubber pads under the rails. The...

Claims

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Application Information

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IPC IPC(8): C08K3/08C08L7/00
Inventor 周祚万王小文杨世德
Owner RENTAI IND CHENGDU
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