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Composite material with EMI shielding properties and process to produce it

專利號(hào)
US11889671B2
公開日期
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.

說明書

In this analysis, a thermal desorption process is imposed on the polymer sample during 15 minutes at 150° C. in an oven. Volatile organic compounds are extracted from the sample by an imposed helium flux and are captured in an adsorbent cartridge TENAX cooled at ?30° C.

In a second process, volatile compounds are injected in a chromatographic separation column via a rapid heating process of the cartridge at 230° C. The analytes are separated onto the column before being detected by FID.

Results: The compounds are identified based on their retention times in comparison with previously determined retention times of n-paraffins, in the same experimental conditions. The quantification of the components is performed using an external calibration curve (linear) established using 1-hexene as reference.

Chromatographic Analysis Conditions:

    • Capillary column: type: HP-5
      • Length: 60 m
      • Internal diameter: 0.32 mm
      • Phase type: 5% Ph-Me-siloxane
      • Phase thickness: 1 μm
    • Detector type: F.I.D
      • Temperature: 280° C.
      • Air flow: 450 ml/min
      • Hydrogen flow: 40 ml/min
      • Flow make up: 30 ml/min (constant)

權(quán)利要求

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