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Nylon engineering plastic for high-speed railway rail fastening and method for manufacturing same

A technology for high-speed railways and engineering plastics, which is applied in the fields of nylon engineering plastics for rail fasteners of high-speed railways and its manufacture, high-strength nylon engineering plastics formulations and its manufacture, and can solve the problems of difficult molding and processing, no insulation performance, and low anti-climbing resistance and other problems, to achieve the effect of lightening the weight of the fastener, good insulation performance, and high anti-climbing resistance

Inactive Publication Date: 2008-08-27
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of existing steel rail fasteners such as heavy weight, difficult forming and processing, low anti-climbing resistance, poor elasticity, and no insulation performance, and to invent a light-weight fastener using nylon as the main raw material. Nylon engineering plastics for high-speed railway rail fasteners with excellent performance and its manufacturing method provide urgently needed raw materials for the manufacture of fasteners that meet the needs of high-speed railway development

Method used

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  • Nylon engineering plastic for high-speed railway rail fastening and method for manufacturing same

Examples

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Effect test

Embodiment 1

[0020] A nylon engineering plastic for high-speed railway rail fasteners with a weight of 1000kg, which consists of the following components:

[0021] (A) nylon 6 resin (component A) that weight is 700kg;

[0022] (B) maleic anhydride grafted ethylene propylene diene rubber (EPDM) (component B) of 150kg in weight;

[0023] (C) An alkali-free continuous glass fiber (component C) having a weight of 150 kg treated with 5.0 kg of a silane coupling agent.

[0024] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0025] Step 1: Fully mix the above components A and B with a medium-speed mixer;

[0026] Step 2: Melt and blend with a twin-screw extruder, extrude and granulate, and add alkali-free continuous glass fiber (component C) during the extrusion process. The extrusion process parameters are: melt temperature 220-250°C, screw speed 100-500rpm, mixing time 1-10min.

Embodiment 2

[0028] A nylon engineering plastic for high-speed railway rail fasteners with a weight of 1000kg, which consists of the following components:

[0029] (A) nylon 6 resin (component A) that weight is 700kg;

[0030] (B) weight is the maleic anhydride grafted ethylene-octene copolymer (POE) (component B) of 150kg;

[0031] (C) Alkali-free continuous glass fiber (component C) with a weight of 150 kg treated with 4.5 kg of a silane coupling agent.

[0032] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0033] Step 1: Fully mix the above components A and B with a medium-speed mixer;

[0034] Step 2: Melt and blend with a twin-screw extruder, extrude and granulate, and add alkali-free continuous glass fiber (component C) during the extrusion process. The extrusion process parameters are: melt temperature 220-250°C, screw speed 100-500rpm, mixing time 1-10min.

Embodiment 3

[0036] A nylon engineering plastic for high-speed railway rail fasteners with a weight of 1000kg, which consists of the following components:

[0037] (A) nylon 6 resin (component A) that weight is 700kg;

[0038] (B) ethylene-octene copolymer (POE) (component B) with a weight of 150 kg;

[0039] (C) Alkali-free continuous glass fiber (component C) with a weight of 150 kg treated with 4.5 kg of a silane coupling agent.

[0040] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0041] Step 1: Fully mix the above components A and B with a medium-speed mixer;

[0042] Step 2: Melt and blend with a twin-screw extruder, extrude and granulate, and add alkali-free continuous glass fiber (component C) during the extrusion process. The extrusion process parameters are: melt temperature 220-250°C, screw speed 100-500rpm, mixing time 1-10min.

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Abstract

Polyamide engineering plastic for rail fasteners of high speed railway and a preparation process are disclosed. The plastic belongs to organic material, which is characterized in that the plastic is formed through conducting mixture extrusion pelleting for the following components: material substrate material with 48-88% percentage by weight, wherein the substrate material is polyamide 6 resin, or is polyamide 66 resin, or is the mixture of polyamide 6 resin and polyamide 66 resin, addition agent with 0-15% percentage by weight, wherein the addition agent is toughening agent and compatilizer, intensifier with 10-50% percentage by weight, wherein the surface of intensifier is treated with silane coupling agent with 0.2-5% percentage by weight relative to additive matters. Polyamide engineering plastic provides raw material for producing first-grade railway rail fasteners. The fastener which is produced by the plastic has the advantages of light weight, high strength and high impact, large loading, easy machine shaping and dyeing and reasonable cost.

Description

technical field [0001] The invention relates to an engineering plastic and a manufacturing method thereof, in particular to a high-strength nylon engineering plastic formula and a manufacturing method thereof, in particular to a nylon engineering plastic for high-speed railway rail fasteners and a manufacturing method thereof. Background technique [0002] Traditional railway rail fasteners are generally made of metal materials. Due to the heavy weight of railway rail fasteners, difficulty in forming and processing, and problems such as low anti-climbing resistance, poor elasticity, and no insulation performance, they are widely used in the process of railway laying, use and maintenance. There are many restrictions and many safety hazards, which can no longer meet the needs of high-speed development of railways. [0003] Therefore, it is urgent to develop an engineering plastic fastener with light weight, strong ability to maintain gauge, high anti-climbing resistance, excel...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L51/06C08K7/14C08J5/08B29C47/92C08L23/08C08L33/04C08L53/02C08K3/26C08K3/36C08K13/06E01B9/00B29C48/92
CPCB29C47/92B29C48/04B29C48/40B29C48/92B29C2948/92561B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 周勇王岩吴汾
Owner NANJING JULONG SCI&TECH CO LTD
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