Composite material with EMI shielding properties and process to produce it
摘要
說明書
Composite material with metal-coated particles was produced wherein:
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- Component A used was a polypropylene PPH 7060 commercially available from TOTAL?, the polypropylene is a homopolymer having an MFI of 12 g/10 min as determined by ISO1133 (230° C.?2.16 kg/10 min).
- Component B was silver-coated glass fibres with an average length of 180 μm and an average diameter of 15 μm. The average density was 3.1 g/cc. The silver content is about 20 wt. % based on the total weight of the fibres and the silver layer is nanometric. The silver-coated glass fibres were commercially available from Hart Materials UK.
- optional component C being stearic acid. The stearic acid used was commercially available from Sigma-Aldrich Merck France (>95% purity grade).
When component C is added, the composite material is according to the disclosure. In the absence of component C, the composite material is comparative.
Comparative composite materials were also produced wherein component A being polypropylene PPH 7060 and electrically conductive particles, alternative to component B, being metal particles. In specie, the metal particles were tin particles commercially available from GoodFellow under the reference SN006020 with an average diameter of 45 μm.
Other comparative composite materials were produced wherein component A being polypropylene PPH 7060 and electrically conductive particles, alternative to component B, being carbon nanotubes. The CNT used were Nanocyl? NC 7000 available from Nanocyl.
