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
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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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