| 摘要 |
<p>The invention relates to a coating comprising at least two sequentially applied layers: a primer layer of a suitable binder resin that is bonded to the clean surface of a substrate and a layer or layers of particles of polytetrafluoroethylene (PTFE). The layer or layers of PTFE consist essentially of surfactant-free PTFE particles derived from an aqueous dispersion which is subsequently dried. The invention relates to the coating of a wide variety of substrates as, for example, the coating of stainless steel surgical needles, dental floss, medical sutures and the like wherein the coating has a total thickness in the range of from about 0.2 νm to about 25 νm and more.</p> |
