Microcellular foaming HIPS electromagnetic shielding material as well as preparation method and application thereof

An electromagnetic shielding material, a technology of microcellular foaming, which is applied in the field of preparation of functional polymer materials, can solve the problems of poor electromagnetic shielding effect, etc., and achieves reduction of density, improvement of electrical conductivity and electromagnetic shielding efficiency, electrical conductivity and thermal conductivity. high effect

Active Publication Date: 2020-11-20
VIEW ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem of poor electromagnetic shielding effect in the current HIPS electrical casing, and provides a microporous foamed HIPS electromagnetic shielding material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix 100 parts of HIPS, 2 parts of foaming agent and 0.5 parts of crosslinking agent with a high-speed mixer for 5 minutes to obtain the initial mixture of HIPS, foaming agent and crosslinking agent; A screw extruder was used for melt blending, the melting temperature was 160 °C, and the screw speed was 90 rpm. The melt blend was extruded, granulated and dried to obtain Blend I.

[0028] (2) Mix 100 parts of HIPS, 10 parts of compatibilizer, 40 parts of electromagnetic shielding additive, 1 part of antioxidant, 8 parts of activator, 10 parts of nucleating agent and 10 parts of lubricant in a high-speed mixer for 10 minutes , to obtain the initial mix of HIPS, compatibilizer, electromagnetic shielding additive, antioxidant, activator, nucleating agent and lubricant; above-mentioned initial mix is ​​carried out melt blending with twin-screw extruder, and melting temperature is At 190 °C, the screw speed was 120 rpm, and the melted blend was extruded, granulated and dri...

Embodiment 2

[0040] (1) Mix 100 parts of HIPS, 5 parts of foaming agent and 1 part of cross-linking agent with a high-speed mixer for 8 minutes to obtain the initial mixture of HIPS, foaming agent and cross-linking agent; A screw extruder was used for melt blending, the melting temperature was 180°C, and the screw speed was 110 rpm. The melted blend was extruded, granulated and dried to obtain Blend I.

[0041] (2) Mix 100 parts of HIPS, 8 parts of compatibilizer, 30 parts of electromagnetic shielding additive, 0.8 part of antioxidant, 6 parts of activator, 7 parts of nucleating agent and 7 parts of lubricant in a high-speed mixer for 8 minutes , to obtain the initial mix of HIPS, compatibilizer, electromagnetic shielding additive, antioxidant, activator, nucleating agent and lubricant; above-mentioned initial mix is ​​carried out melt blending with twin-screw extruder, and melting temperature is At 180 °C, the screw speed was 110 rpm, and the molten blend was extruded, granulated and drie...

Embodiment 3

[0053] (1) Mix 100 parts of HIPS, 8 parts of foaming agent and 2 parts of crosslinking agent with a high-speed mixer for 10 minutes to obtain the initial mixture of HIPS, foaming agent and crosslinking agent; A screw extruder was used for melt blending, the melting temperature was 190°C, and the screw speed was 120 rpm. The melted blend was extruded, granulated and dried to obtain blend I.

[0054] (2) Mix 100 parts of HIPS, 5 parts of compatibilizer, 20 parts of electromagnetic shielding additive, 0.5 part of antioxidant, 4 parts of activator, 3 parts of nucleating agent and 4 parts of lubricant in a high-speed mixer for 5 minutes , to obtain the initial mix of HIPS, compatibilizer, electromagnetic shielding additive, antioxidant, activator, nucleating agent and lubricant; above-mentioned initial mix is ​​carried out melt blending with twin-screw extruder, and melting temperature is At 160 °C, the screw speed was 90 rpm, and the molten blend was extruded, granulated and dried...

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PUM

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Abstract

The invention discloses a microcellular foaming HIPS electromagnetic shielding material and a preparation method and application thereof, and belongs to the technical field of preparation of functional polymer materials. The electromagnetic shielding material is prepared by the following steps: carrying out melt blending on HIPS, a foaming agent and a cross-linking agent to prepare a blend I; subjecting HIPS, a compatilizer, an electromagnetic shielding aid, an antioxidant, an activating agent, a nucleating agent and a lubricating agent to melt blending to prepare a blend II, and finally, mixing the blend I and the blend II and subjecting a product to microcellular foaming to prepare the material. The microcellular foaming HIPS electromagnetic shielding material prepared by the invention has high electromagnetic shielding effectiveness and excellent electromagnetic shielding effectiveness stability, can be widely applied to linings of shells of electric appliances such as household appliances, medical electric appliances, outdoor electric appliances, industrial and mining electric appliances and the like, and has relatively high economic value and social benefit. And the method plays a key role in a forced authentication requirement of each export country.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, and in particular relates to a microporous foamed HIPS electromagnetic shielding material and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of digital communication and information industry, electromagnetic waves, as an important carrier of information dissemination, have penetrated into all aspects of the national economy such as radio communication equipment, electronic instruments, computers and household appliances. Modern people's living standards are improving day by day, and more and more electrical products enter the family. These electrical appliances will more or less generate electromagnetic radiation. Long-term electromagnetic radiation will damage human health, leading to neurasthenia, insomnia, forgetfulness, leukopenia, Irregular heartbeat, changes in blood pressure, misc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K13/06C08K9/12C08K3/08C08K3/04C08K5/134C08K5/526C08K3/22C08K5/098C08K5/09C08K5/14C08J9/10H05K9/00
CPCC08J9/103C08J9/0095C08J9/009C08J9/0061C08J9/008C08J9/0066C08J9/0023C08J9/0038H05K9/0081C08J2203/04C08J2205/044C08J2351/04C08J2451/04C08K13/06C08K9/12C08K2201/011C08K2003/0806C08K3/042C08K5/1345C08K5/526C08K2003/2296C08K5/098C08K5/09C08K2201/014C08K5/14
Inventor 蒋高建邹建康秦鹏伟
Owner VIEW ELECTRONICS
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