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Nylon engineering plastics for high-speed transit railway track and manufacture method thereof

A technology for rail transit and high-speed railway, which is applied in the field of nylon engineering plastics for high-speed railway rail transit and its manufacturing, can solve the problems of not being able to meet the low temperature environment, the impact performance is not very good, etc., to improve production efficiency, shorten mixing time, The effect of good impact performance

Active Publication Date: 2011-05-18
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the nylon engineering plastic disclosed in this patent can be used in high-speed railways, its impact performance is still not very good, especially at low temperature, which cannot meet the requirements of low temperature environments.

Method used

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  • Nylon engineering plastics for high-speed transit railway track and manufacture method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] formula:

[0021] ① 50.9 parts by weight of nylon 6 resin; 0.3 parts by weight of light stabilizer; 0.2 parts by weight of coupling agent; 0.2 parts by weight of antioxidant; 0.4 parts by weight of lubricant;

[0022] ② 18 parts by weight of maleic anhydride grafted POE; 25 parts by weight of short glass fibers; 5 parts by weight of glass microspheres.

[0023] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0024] Step 1: Fully mix the above components ① through a medium-speed mixer;

[0025] Step 2: Feed the extruded raw materials obtained in Step 1 into a twin-screw extruder for melt blending, extrude and granulate, and use side feeding at different positions of the extruder to simultaneously add components part ②. The extrusion process parameters are: melt temperature 220-250°C (melt temperature is a range), screw speed 300rpm, mixing time 1min.

Embodiment 2

[0027] formula:

[0028] ① 53.9 parts by weight of nylon 6 resin; 0.3 parts by weight of light stabilizer; 0.2 parts by weight of coupling agent; 0.2 parts by weight of antioxidant; 0.4 parts by weight of lubricant;

[0029] ② 16 parts by weight of maleic anhydride grafted POE; 29 parts by weight of continuous glass fiber.

[0030] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0031] Step 1: Fully mix the above components ① through a medium-speed mixer;

[0032] Step 2: Feed the extruded raw materials obtained in Step 1 into a twin-screw extruder for melt blending, extrude and granulate, and use side feeding at different positions of the extruder to simultaneously add components part ②. The extrusion process parameters are: melt temperature 220-250°C, screw speed 350rpm, mixing time 2min.

Embodiment 3

[0034] formula:

[0035]① 38.6 parts by weight of nylon 66 resin; 0.4 parts by weight of light stabilizer; 0.2 parts by weight of coupling agent; 0.3 parts by weight of antioxidant; 0.5 parts by weight of lubricant;

[0036] ② Maleic anhydride grafted EPDM rubber 25 parts by weight; short glass fiber 30 parts by weight; talcum powder 5 parts by weight.

[0037] The manufacture method of above-mentioned engineering plastics comprises the steps:

[0038] Step 1: Fully mix the above components ① through a medium-speed mixer;

[0039] Step 2: Feed the extruded raw materials obtained in Step 1 into a twin-screw extruder for melt blending, extrude and granulate, and use side feeding at different positions of the extruder to simultaneously add components part ②. The extrusion process parameters are: melt temperature 250-280°C, screw speed 400rpm, mixing time 3min.

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Abstract

The invention relates to nylon engineering plastics and a manufacture method thereof, in particular to nylon engineering plastics for high-speed transit railway tracks and a manufacture method thereof. The nylon engineering plastics comprise the following components in percentage by weight: 35 to 60 percent of nylon resin, 20 to 35 percent of glass fibre, 0 to 10 percent of inorganic mineral, 16 to 30 percent of compatilizer, 0.3 to 0.5 percent of light stabilizer, 0.1 to 0.3 percent of coupling agent, 0.1 to 0.5 percent of antioxygen and 0.4 to 1 percent of lubricant, wherein the compatilizer is one kind of or a mixture of two kinds of Maleic anhydride grafted EPDM (Ethylene Propylene Diene Monomer) rubber and maleic anhydride grafted POE (Polyolefin Elastomer), and the melt flow rate of the compatilizer is 0.5 to 1.5g / 10min. The manufacture method comprises the steps of: adding the compatilizer into an extruder in a lateral feeding addition method under the condition that the melt temperature is 220 to 280 DEG C and the mixing time is 1-5min; and controlling the rotate speed of a screw between 300 and 450rpm. According to the invention, the tensile strength, the impact toughness and the size stability can all meet the requirements for the operation of high-speed trains with running speed more than 300km / h.

Description

technical field [0001] The invention relates to a nylon engineering plastic and a manufacturing method thereof, in particular to a nylon engineering plastic for high-speed railway track traffic and a manufacturing method thereof. Background technique [0002] Due to the continuous increase in the speed of railway trains, the performance of existing railway track system materials can no longer meet the requirements of high-speed train operation (above 300km / h), especially in the mechanical properties of materials (including tensile strength and impact toughness). , and there are higher requirements on the dimensional stability of the material, and it must be suitable for the northern regions where the winter temperature is low. [0003] Patent application number: 200410067639.8, application date: 2004-10-29, patent name: nylon 66 composition that can be used for automobile engine cover and its preparation method, publication number: 1765991, the Chinese patent discloses a nyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L51/06C08K13/04C08K7/14C08K7/20C08K3/34C08K3/26B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 成二国周勇吴建国吴汾
Owner NANJING JULONG SCI&TECH CO LTD
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