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Composite material with EMI shielding properties and process to produce it

專利號(hào)
US11889671B2
公開(kāi)日期
2024-01-30
申請(qǐng)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(shuō)明書(shū)

For example, component B is present in a content ranging from 20.0 to 55.0 wt. % based on the total weight of the composite material; for example, from 22.0 to 50.0 wt. %; for example, from 25.0 to 45.0 wt. %. For example, component B is present in a content of at least 20.0 wt. % based on the total weight of the composite material; for example, at least 22.0 wt. % for example, at least 25.0 wt. %. For example, component B is present in a content of at most 55.0 wt. % based on the total weight of the composite material; for example, at most 50.0 wt. % for example, at most 45.0 wt. %.

For example, component B has a density of less than 4.0 g/cc; for example, less than 3.5 g/cc, for example, less than 3.2 g/cc. For example, less than 3.0 g/cc; for example, less than 2.9 g/cc.

For example, component B has a density of at least 0.8 g/cc; for example, at least 1.0 g/cc; for example, at least 1.5 g/cc; for example, at least 2.0 g/cc; for example, at least 2.2 g/cc.

For example, the metal-coated particles are or comprise metal-coated fibres with a length to diameter ratio of at least 5; with preference, the length to diameter ratio is at least 10 and/or the length to diameter ratio is at most 100. For example, the metal-coated particles are or comprise metal-coated fibres wherein the fibres are selected from glass fibres, carbon fibres, polymer fibres, natural fibres and any mixture thereof; with preference, the metal-coated particles are or comprise metal-coated glass-fibres.

權(quán)利要求

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