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Preparation method of long-chain nylon ultrafine powder

A long-chain nylon and superfine powder technology, which is applied in cocoa, grain processing, food science, etc., can solve the problems of long-chain nylon superfine powder, such as low efficiency, uneven distribution of powder particles, and unsuitable promotion, so as to achieve high production efficiency , uniform particle size distribution and controllable particle size

Inactive Publication Date: 2009-12-30
浙江中科辐射高分子材料研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because long-chain nylon has strong toughness, the efficiency of preparing long-chain nylon ultrafine powder by the above-mentioned traditional pulverization method is low, the distribution of powder particles is uneven, and the cost is high, so it is not suitable for promotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First put the long-chain nylon 11 resin into the radiation environment of the air, and then use the radiation source to 60 The radiation of Co is irradiated, and the radiation dose is 100KGy. The long-chain nylon 11 resin after radiation treatment is blended with pigments and antioxidants in a mass ratio of 1:0.1:0.005, and then modified by extruding with a twin-screw extruder. The material modified by the twin-screw extruder is put into a disc crusher for coarse crushing, and then the coarsely crushed material is crushed by a jet mill at a pressure of 1000 kPa at room temperature, and the particle size classification device of the jet mill is adjusted. The long-chain nylon 11 superfine powder with an average particle size of 20 μm was obtained.

Embodiment 2

[0020] First put the long-chain nylon 12 resin into the radiation environment of the air, and then use the radiation source to 60 The radiation of Co is irradiated, and the radiation dose is 80KGy. The long-chain nylon 12 resin after radiation treatment is blended with pigments and antioxidants in a mass ratio of 1:0.05:0.002, and then modified by extruding with a twin-screw extruder. The material modified by the twin-screw extruder is put into a disc mill for coarse crushing, and then the coarsely crushed material is air-pulverized with a jet mill at a pressure of 800 kPa at room temperature, and the particle size classification device of the jet mill is adjusted. The long-chain nylon 12 superfine powder with an average particle size of 30 μm was obtained.

Embodiment 3

[0022] First put the long-chain nylon 11 resin into the radiation environment of the air, and then use the radiation source to 60 The radiation of Co is irradiated, and the radiation dose is 80KGy. The long-chain nylon 11 resin after radiation treatment is blended with pigments and antioxidants in a mass ratio of 1:0.1:0.005, and then modified by extruding with a twin-screw extruder. The material modified by the twin-screw extruder is put into a disc crusher for coarse crushing, and then the coarsely crushed material is crushed by a jet mill at a pressure of 1200 kPa at room temperature, and the particle size classification device of the jet mill is adjusted. The long-chain nylon 11 superfine powder with an average particle size of 20 μm was obtained.

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PUM

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Abstract

The invention relates to a preparation method of long-chain nylon ultrafine powder. The long-chain nylon ultrafine powder is prepared by carrying out radiation to the long-chain nylon resin by a ray technology and then adopting a crushing technique. The preparation method comprises the following steps of: using radioactive ray to carry out radiation to the long-chain nylon resin in a radioactive environment; mixing radiated long-chain nylon resin and an auxiliary agent, and using a double-screw extruder for extruding and modifying; putting the modified materials of the double-screw extruder into an abrasive disk grinder for coarse grinding; using an air flow grinder to carry out air flow grinding on the materials by coarse grinding under normal temperature; adjusting a size grading device of the air flow grinder to obtain the long-chain nylon ultrafine powder; and the long-chain nylon ultrafine powder prepared by applying the method has even size distribution, low energy consumption for the whole grinding process and high production efficiency.

Description

technical field [0001] The invention relates to a preparation method of a polymer material and belongs to the field of chemical polymer material manufacturing. Background technique [0002] Long-chain nylon has more imide groups in the chain structure and low density of amide groups. It has the properties of short-chain nylon and polyolefin. Long-chain nylon powder is a thermoplastic powder. It has a wide working temperature and good It has the advantages of good physical properties and wear resistance, and because of its low melting point, good leveling property, and strong adhesion with various metals, it is often used as powder coating on metal surfaces. At present, the main methods for preparing long-chain nylon fine powder are: solvent precipitation method, chemical synthesis method and cryogenic pulverization method. But because long-chain nylon has strong toughness, the efficiency of preparing long-chain nylon ultrafine powder by the above-mentioned traditional crush...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08J3/28B02C7/175B02C19/06
Inventor 吴国忠苏杰龙
Owner 浙江中科辐射高分子材料研发中心
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