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Super low temperature functional composite nanomaterial used for apron block under the rail

A nano-composite material and nano-material technology, which is applied to the material field of the baffle seat under the railway track, can solve the problems of crushing and brittle cracking, and achieve the effect of improving impact resistance and ensuring rigidity and toughness.

Inactive Publication Date: 2005-01-19
SHANGHAI PLASTIC PROD NO 18 PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the raw material of the baffle seat under the railway track is generally made of ordinary polyamide material. The baffle seat of this material is prone to brittle cracking and crushing when used in small radius areas, cold regions and extremely arid regions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Ultra-low temperature functional nanocomposites applied to underrail baffle seats, including processed nanomaterials SiO 2 The weight percentage is less than 3%, the toughening agent is EPDM rubber, the weight percentage is less than 8%, and the weight percentage of the polyamide base material is greater than 89%.

[0011] The processing technology is as follows:

[0012] Put the nanomaterial into tetrakis[β-(3,5-di-tert-butyl-4'-hydroxyphenyl)propionic acid]pentaerythritol ester containing antioxidant and composite coupling agent, aminopropyltriethoxysilane and isopropyl triisostearyl titanate dissolved in alcohol at a concentration of 10% in an organic solution, using mechanical equipment that can give pressure to stir for surface treatment, and the modified nano-SiO 2 It has good dispersion in macromolecular copolymers. After that, a grafted elastomer toughening agent, such as EPDM rubber, is used to blend and granulate the base material nylon, so as to achieve the...

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PUM

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Abstract

The invention discloses a super low temperature functional composite nanomaterial used for apron block under the rail, which comprises processed nanometer material SiO2 wt% less than 3%, the toughening agent is EPT rubber wt% less than 8%, the content by weigh percent of polyamide base-material is greater than 89%, the nano material is SiO2, the treatment process is also disclosed by the invention.

Description

Technical field: [0001] The invention relates to a material for a rail under-rail baffle seat which is fixed between rails and sleepers to maintain gauge and play buffering and insulating functions. Background technique: [0002] The baffle seat under the railway track is a part fixed between the rail and the sleeper to maintain the gauge and play a buffer and insulating role. On the one hand, it must be able to withstand the horizontal thrust of the track when the train is running, uneven contact and excessive local pressure. And the large impact pressure generated by unexpected impact force, that is, the material is required to ensure dimensional stability, the product is not easy to deform, and the residual deformation of compression is small, so as to ensure that the elastic range is not affected, and it should have considerable toughness; on the other hand, it is required to adapt to Different environmental climates require high strength, cold resistance and weather res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/36C08L77/00E01B3/44
Inventor 奚文义陈耀华刘峥夏灵赵志青张靓凌晓英张榕生吉莉娟
Owner SHANGHAI PLASTIC PROD NO 18 PLANT