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A kind of magnetic material-nylon composite material for injection molding and preparation method thereof

A nylon composite material and magnetic material technology, which is applied in the field of magnetic material for injection molding-nylon composite material and its preparation, can solve problems such as restricting the application of matrix materials and cannot be used in a low temperature environment, and achieves improved physical and mechanical properties, improved flow properties, The effect of high thermal stability

Active Publication Date: 2020-03-20
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nylon powder used in the base material is generally unprocessed nylon, which cannot be used in low temperature environments, which greatly restricts the application of the base material.

Method used

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  • A kind of magnetic material-nylon composite material for injection molding and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A magnetic material-nylon composite material for injection molding, made from the following raw materials in weight percentage:

[0036] Magnetic powder 80wt%, nylon powder 15wt%, silicone thermoplastic elastomer 2wt%, coupling agent 2wt%, maleic anhydride 0.7wt%, lubricant 0.1wt%, initiator 0.1wt%, toughening agent 0.1wt%; magnetic powder It is Sr series ferrite injection molding powder, nylon powder is nylon 6, silicone thermoplastic elastomer is silicone thermoplastic elastomer with nylon matrix, coupling agent is silane coupling agent, lubricant is paraffin, initiator is peroxide dicumyl.

[0037] A preparation method of magnetic material-nylon composite material for injection molding, comprising the following steps:

[0038] a) Add silicone thermoplastic elastomer to nylon, then add maleic anhydride and initiator and blend for 20 minutes to prepare binder;

[0039] b) adding a coupling agent to the magnetic powder and blending for 20 minutes to obtain a surface-t...

Embodiment 2

[0043] A magnetic material-nylon composite material for injection molding, made from the following raw materials in weight percentage:

[0044] Magnetic powder 90wt%, nylon powder 6wt%, silicone thermoplastic elastomer 2wt%, coupling agent 1.65wt%, maleic anhydride 0.2wt%, lubricant 0.05wt%, initiator 0.05wt%, toughener 0.05wt%; The magnetic powder is Ba series ferrite injection molding powder, the nylon powder is nylon 12, the silicone thermoplastic elastomer is a polyolefin-based silicone thermoplastic elastomer, the coupling agent is a phosphate coupling agent, and the lubricant is stearic acid. The initiator is azobisisobutyronitrile.

[0045] A preparation method of magnetic material-nylon composite material for injection molding, comprising the following steps:

[0046] a) Add silicone thermoplastic elastomer to nylon, then add maleic anhydride and initiator and blend for 30 minutes to prepare binder;

[0047] b) adding a coupling agent to the magnetic powder and blend...

Embodiment 3

[0051] A magnetic material-nylon composite material for injection molding, made from the following raw materials in weight percentage:

[0052] Magnetic powder 89wt%, nylon powder 7wt%, silicone thermoplastic elastomer 2.6wt%, coupling agent 0.1wt%, maleic anhydride 1wt%, lubricant 0.1wt%, initiator 0.1wt%, toughener 0.1wt%; The magnetic powder is the same sex NdFeB magnetic powder, the nylon powder is nylon 66, the silicone thermoplastic elastomer is a silicone thermoplastic elastomer with a polyurethane matrix, the coupling agent is a titanate coupling agent, the lubricant is calcium stearate, and the initiator is For 2,5-dimethyl-2,5-bis-tert-butylhexane.

[0053] A preparation method of magnetic material-nylon composite material for injection molding, comprising the following steps:

[0054] a) Add silicone thermoplastic elastomer to nylon, then add maleic anhydride and initiator and blend for 30 minutes to prepare binder;

[0055] b) adding a coupling agent to the magneti...

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Abstract

The invention belongs to the technical field of injection molding magnets, and discloses a composite magnet-nylon material for injection molding use. The composite magnet-nylon material for injectionmolding use is prepared from the following raw materials in percentage by weight: 80-90wt% of magnet powder, 6-15wt% of nylon powder, 2-4wt% of thermoplastic silicone elastomer, 0.1-2wt% of a couplingagent, 0.2-1wt% of maleic anhydride, 0.05-0.1wt% of lubricant, 0.05-0.1wt% of an initiator, and 0.05-0.1wt% of a toughening agent. The invention further discloses a preparation method of the composite magnet-nylon material for injection molding use. The preparation method of the composite magnet-nylon material for injection molding use comprises the following steps: modifying nylon; modifying surface of the magnet powder; carrying out blending and granulating; and so on. The composite magnet-nylon material for injection molding use disclosed by the invention is high in thermal stability, namely, chemical bonds of molecules do not break or decompose at high temperature; and thus, physical and mechanical properties of the composite magnet-nylon material are effectively improved so as to have product toughness enhanced.

Description

technical field [0001] The invention relates to the technical field of injection molding magnets, in particular to a magnetic material-nylon composite material for injection molding and a preparation method thereof. Background technique [0002] With the development of high-tech products such as auto parts, computers, and electronic devices, which are increasingly miniaturized, lightweight, complex in shape, and intelligent, the requirements for the performance, strength, and stability of injection-molded magnetic devices are getting higher and higher. Especially in the field of automotive motors, it is difficult for ordinary magnetic device injection molding products to meet the corresponding material requirements. [0003] The application of injection molding production process in the magnetic material industry has opened up a new application field of magnetic materials. Its suitable processing temperature can realize the mixing granulation and injection molding of one mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L77/06C08L83/04C08L91/06C08K3/22C08K5/09C08K5/098C08K3/38
CPCC08K2003/2265C08K2201/01C08L77/02C08L77/06C08L2201/08C08L2207/04C08L83/04C08L91/06C08K3/22C08K5/09C08K3/38C08K5/098
Inventor 胡江平金志洪吴云飞何国栋
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD