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Composite material with EMI shielding properties and process to produce it

專利號
US11889671B2
公開日期
2024-01-30
申請人
TOTALENERGIES ONETECH; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS); UNIVERSITé CLAUDE BERNARD LYON 1 (UCBL)(FR Courbevoie FR Paris FR Villeurbanne)
發(fā)明人
Olivier Lhost; Yves Trolez; Anatoli Serghei; Hubert Lecocq; Philippe Cassagnau
IPC分類
H05K9/00; C08J3/20; C08K5/09; C08K5/20; C08K9/02
技術(shù)領(lǐng)域
wt,resin,composite,fibres,at,mi2,from,min,shielding,polymer
地域: Courbevoie

摘要

The disclosure provides for a composite material suitable for use as EMI shielding material, remarkable in that it comprises a component A being a polymer resin being at least one amorphous polymer resin and/or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin; from 15.0 to 60.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material; and from 0.5 to 5.0 wt. % of component C being one or more dispersants based on the total weight of the composite material; wherein one or more dispersants are selected from fatty acids, fatty acid derivatives, ethylene bis stearamide, functionalized waxes, maleic anhydride-grafted polymers and any mixture thereof; wherein the blend of components A, B and C shows a density ranging from 0.8 to 2.0 g/cc. A process to produce such composite material is also described as well as an EMI shield article made from such composite material and the use of such composite material in an EMO shield article.

說明書

For example, the at least one polyethylene resin is selected from a virgin polyethylene resin, a post-consumer polyethylene resin and a blend of a virgin polyethylene resin and a post-consumer polyethylene resin.

In one or more embodiments, the at least one polyethylene resin comprises a post-consumer polyethylene resins at a content ranging from 5 to 100 wt. % of post-consumer polyethylene resin based on the total weight of component A; for example, from 20 to 95 wt. %; for example, from 40 to 90 wt. %; for example, from 50 to 85 wt. %; for example, from 60 to 80 wt. %.

When the at least one polyethylene resin is or comprises a post-consumer polyethylene resin; the MI2 of the post-consumer polyethylene resin can be selected in the same manner as for the virgin resin.

An example of a commercially available stream of post-consumer polyethylene resin (PCR-PE) that can be used according to the disclosure is KWR105M2 marketed by KW Plastics.

The post-consumer polyethylene resin (PCR-PE) that can be used under the disclosure is preferably selected from HDPE dairy or industrial packaging waste.

權(quán)利要求

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