Filmcast PTFE has historically been limited to a maximum diameter of around 0.100 in., which restricted the option for larger French size aspiration catheters. Confluent has introduced a new filmcast PTFE that breaks through that threshold. The company is offering PTFE ID sizes from 0.010 to 0.137 in. and up to 0.155 in. on a limited basis with lead times of four weeks or less.
According to the company, this latest development provides customers with more options for thin-walled, flexible PTFE liners at these larger diameter sizes. PTFE is extremely beneficial in medical device manufacturing for a number of reasons, including its lubricity, low surface energy, biocompatibility, chemical resistance, extreme temperature tolerance, and ability to be readily sterilized.
Compared to ram extruded PTFE, filmcast PTFE can be manufactured to hold thinner wall thicknesses and tighter tolerances. Since Filmcast PTFE is coated over a mandrel, it is extremely well suited for the addition of a thermoplastic strike layer to promote adhesion. In addition, since it is done in a continuous spool-to-spool manner, it is extremely cost effective. Confluent’s filmcast PTFE can be provided in discrete cut-to-length pieces or on a spool. MD&M West Booth 1812