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Syringe with PECVD lubricity layer

  • US 10,537,273 B2
  • Filed: 07/08/2019
  • Issued: 01/21/2020
  • Est. Priority Date: 05/13/2009
  • Status: Active Grant
First Claim
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1. A syringe comprising:

  • a barrel and a plunger, the barrel having an inner surface defining a lumen and the plunger having a side surface engaging the barrel inner surface, wherein the inner surface is a substrate comprising a polymer, coated with a barrier coating of SiOx, in which x is from about 1.5 to about 2.9, and a lubricity layer applied to the barrier coating of SiOx and configured to provide a lower plunger sliding force or breakout force than the uncoated substrate, the lubricity layer having the following atomic ratios, measured by X-ray photoelectron spectroscopy (XPS),
    SiwOxCy,where w is 1, x in this formula is from about 0.5 to 2.4, and y is from about 0.6 to about 3;

    the lubricity layer having a thickness by transmission electron microscopy (TEM) between 10 and 1000 nm;

    the lubricity layer deposited by plasma enhanced chemical vapor deposition (PECVD) under conditions effective to form a coating from a precursor comprising a linear siloxane, a monocyclic siloxane, or a combination of any two or more of these precursors.

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