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Electromagnetic shielding plastic

An electromagnetic shielding and plastic technology, applied in the field of functional plastics, can solve the problems of poor shielding effect, complex processing technology, high material price, etc., and achieve the effect of convenient processing and molding, uniform dispersion and good effect

Inactive Publication Date: 2014-08-13
QUANJIAO XIANGRUI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of precision instruments, the importance of electromagnetic shielding materials is becoming more and more prominent. Since the components of precision instruments cannot interfere with each other, it is necessary to use electromagnetic shielding materials for shielding outside the components. Now the common Copper foil or silver foil is used for shielding, but the price of the material is relatively high, and the weight of the material is relatively large, which increases the quality of the instrument and increases the cost of the instrument
The current electromagnetic shielding plastic adopts a layered structure, and a shielding layer is added in the middle of the plastic sheet, the processing technology is complicated, and the shielding effect is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] An electromagnetic shielding plastic, comprising by weight 93% plastic matrix nylon 66, 3.2% graphene filler, 2.2% carbon black, 0.6% heat stabilizer lead nitrate, 0.5% plasticizer dibutyl phthalate, 0.5% UV protection agent benzophenone. Mix the above materials evenly, use a twin-screw extruder to knead and granulate, and then use an injection molding machine to process and shape. The shielding frequency of this material is 0.25-200MHz. At a frequency of 50MHz, the electromagnetic field is weakened by 99.2%, so that the ability of electronic components to see mutual interference is reduced to a minimum value, and there is basically no mutual interference.

Embodiment 2

[0011] An electromagnetic shielding plastic, comprising by weight 93% plastic matrix nylon 66, 4% graphene filler, 2% carbon black, 0.2% heat stabilizer lead nitrate, 0.6% plasticizer dibutyl phthalate, 0.2% UV protection agent benzophenone. Mix the above materials evenly, use a twin-screw extruder to knead and granulate, and then use an injection molding machine to process and shape.

[0012] Under the 500Hz magnetic field, using this electromagnetic shielding material can slightly attenuate the magnetic field by 99.6%. Much higher than other products.

Embodiment 3

[0014] An electromagnetic shielding plastic, comprising by weight 90% plastic matrix nylon 66, 5% graphene filler, 3% carbon black, 0.5% heat stabilizer lead nitrate, 1% plasticizer dibutyl phthalate, 0.5% UV protection agent benzophenone. Mix the above materials evenly, use a twin-screw extruder to knead and granulate, and then use an injection molding machine to process and shape.

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PUM

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Abstract

The invention provides an electromagnetic shielding plastic which comprises the following components in parts by weight: 85-95% of plastic matrix nylon 66, 3-5% of graphene filler, 1-3% of carbon black, 0.2-0.8% of heat stabilizer lead nitrate, 0.2-1% of plasticizer dibutyl phthalate and 0.1-0.5% of ultraviolet screener diphenyl ketone. The graphene, of which the resistivity is only about 10<-6>ohm.cm and even lower than that of copper or silver, is the material with the minimal resistivity in the world and has light weight, is added into the nylon 66 plastic matrix and uniformly dispersed in the nylon 66, so that the electromagnetic shielding plastic has favorable electromagnetic shielding effect. The electromagnetic shielding plastic is low in cost and convenient for processing and forming.

Description

technical field [0001] The invention belongs to the field of functional plastics, in particular to an electromagnetic shielding plastic. Background technique [0002] With the development of precision instruments, the importance of electromagnetic shielding materials is becoming more and more prominent. Since the components of precision instruments cannot interfere with each other, it is necessary to use electromagnetic shielding materials for shielding outside the components. Now the common Copper foil or silver foil is used for shielding, but the price of the material is relatively high, and the weight of the material is relatively large, which increases the quality of the instrument and increases the cost of the instrument. The current electromagnetic shielding plastic adopts a layered structure, and a shielding layer is added in the middle of the plastic sheet, the processing technology is complicated, and the shielding effect is poor. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/02C08K3/04C08K3/28C08K5/12C08K5/07
CPCC08K13/02C08K3/04C08K3/28C08K5/07C08K5/12C08L2203/20C08L77/06
Inventor 刘仕明
Owner QUANJIAO XIANGRUI PLASTIC