• 专利标题:   Preparing electromagnetic shielding composite material with multi-layer gradient isolation network comprises forming first ball milling product, second premix, third premix and fourth premix, obtaining hot press forming product and overlapping hot pressing from up to down.
  • 专利号:   CN113910718-A
  • 发明人:   GUO S, GUO Y, WU H
  • 专利权人:   UNIV SICHUAN
  • 国际专利分类:   B32B027/06, B32B027/20, B32B027/30, B32B033/00, C08K003/04, C08L025/06, C08L027/16, H05K009/00
  • 专利详细信息:   CN113910718-A 11 Jan 2022 B32B-027/30 202227 Chinese
  • 申请详细信息:   CN113910718-A CN10988369 26 Aug 2021
  • 优先权号:   CN10988369

▎ 摘  要

NOVELTY - Preparing electromagnetic shielding composite material with multi-layer gradient isolation network comprises (i) subjecting polymer micro-particle and conductive carbon based filler for vacuum drying treatment; (ii) ball milling pure polymer particles processed in step (i) into ball milling tank to obtain first ball milling product; (iii) ball milling conductive carbon-based filler, mixture of polymer particles and dry ice into ball milling tank to obtain second premix, third premix and fourth premix; (iv) ball milling first ball milling product, second premix, third premix and fourth premix in ball milling tank, heating, forming, obtaining hot press forming product, naming as incident layer, carbon based shielding layer, carbon-based shielding layer and carbon-based shielding layer; and (v) taking out incident layer, first carbon-based shielding layer, second carbon-based shielding layer and third carbon-based shielding layer and overlapping hot pressing from up to down. USE - The method is useful for preparing electromagnetic shielding composite material with multi-layer gradient isolation network. ADVANTAGE - The method effectively reduces the reflection loss, increases absorption loss, and greatly improves the electromagnetic shielding efficiency.