Insulating cushioning pad material for rail transit tracks and production method thereof
A technology for rail transit and cushioning pads, applied in the field of insulating cushioning pad materials and its preparation, can solve the problems of high cost and insufficient tensile strength, and achieve the effect of low cost and high tensile strength
Active Publication Date: 2013-09-18
中广核三角洲(江苏)塑化有限公司
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- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention provides an insulating cushion material for rail transit rails and a preparation method thereof. The purpose is to develop a new insulating cushion material and solve the problem of high cost of using thermoplastic polyester elastomer (TPEE) as the insulating cushion material at present. However, the use of conventional dynamic vulcanized EPDM thermoplastic elastomers as insulating cushion materials has insufficient tensile strength.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1~5
[0061] Embodiment 1~5: rail transit track insulation cushion material and preparation method thereof
[0062] According to the raw material formulations of Examples 1-5 and Comparative Examples in Table 1, styrene-butadiene rubber, polypropylene, EPDM rubber, polyolefin thermoplastic elastomer (POE), fillers, cross-linking agents and antioxidants were added to the Mix in the plastic mixing pot for 5 minutes, the mixture is added from the main feeding port of the twin-screw extruder, the feed rate is 50 kg / hour, and the rubber oil is added from the middle area of the twin-screw to adjust the product hardness to the set value. The diameter of the twin-screw extruder is 65 mm, the length-to-diameter ratio is 48:1, the temperature control range is 140 ° C ~ 220 ° C, and the screw speed is controlled at 200 rpm ~ 500 rpm. The properties are shown in Table 2.
[0063] Table 1: The raw material formula of embodiment 1~embodiment 5 and comparative example (unit: parts by weight)
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Abstract
The invention relates to an insulating cushioning pad material for rail transit tracks and a production method of the insulating cushioning pad material. The insulating cushioning pad material comprises the following raw materials in parts by weight: 10-30 parts of styrene-butadiene rubber, 10-30 parts of ethylene-propylene-diene rubber, 15-40 parts of polypropylene, 5-20 parts of POE (polyehtylene-octene copolymer), 5-15 parts of rubber oil, 15-25 parts of filler and a certain parts of assistants, and is produced by a dynamic vulcanization process. The thermoplastic elastomer produced by invention can meet the basic performance requirements of the insulating cushioning pad material for rail transit tracks, and has low cost and a low price.
Description
technical field [0001] The invention relates to an insulating cushion material for rail transit rails such as high-speed railways and subways and a preparation method thereof. Background technique [0002] Insulating buffer pads for high-speed rail, subway and other rail transit rails are used between the steel rail and the concrete sleeper. Its main function is to buffer the vibration and impact generated when the vehicle passes the rail at high speed, protect the roadbed and sleeper, and provide electrical protection for the signal system. insulation. In addition, since the insulating cushion is exposed to the atmosphere for a long time, it is required to have good natural aging resistance, cold resistance and heat resistance. It is understood that the current basic requirements for insulating cushion materials in my country include: Shore A hardness of 90-94 degrees; tensile strength greater than 18.0MPa; elongation greater than 700%. [0003] From the perspective of ma...
Claims
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IPC IPC(8): C08L23/12C08L23/16C08L9/06C08L23/08C08K13/02C08K3/34C08K3/26C08K5/01C08K5/14C08K5/103C08K5/3415E01B9/68
Inventor 徐红岩
Owner 中广核三角洲(江苏)塑化有限公司