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Polymer coating on substrates using thermal spray techniques

  • US 9,782,956 B2
  • Filed: 12/27/2012
  • Issued: 10/10/2017
  • Est. Priority Date: 12/28/2011
  • Status: Active Grant
First Claim
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1. A laminate article, comprisinga substrate layer comprising a metal or a metal alloy;

  • anda polymer layer comprising;

    a stand-alone layer of a non-fluorinated polymer compound having a thickness of at least about 20 microns, the stand-alone layer being disposed directly adjacent to and contacting the substrate without an intervening support layer therebetween, the stand-alone layer comprising a plurality of interconnected voids making up at least 10 vol. % of the total volume of the stand-alone layer, anda fluorinated polymer compound covering the stand-alone layer and filling at least a portion of the interconnected voids of the stand-alone layer;

    wherein the concentration of the fluorinated polymer compound in the polymer layer increases in a direction perpendicular to, and moving away from, the substrate layer such that the polymer layer includes a gradual concentration gradient that includes a change of an amount of the non-fluorinated polymer compound and the fluorinated polymer compound relative to an axis perpendicular to the substrate.

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