Most polymers used in creating plastic extruded tubing today have low melting points, making it easy to run the machines at moderate temperatures and create the tubing by extruding through the dies and molds directly from the resin material in the hopper, without any other preparation other than keeping the right mix of resins in the hopper at the correct amounts. Extrusion molding is one of the most economical manufacturing methods for that very reason, less man hours in preparation means less cost to make the final product.

PTFE or Teflon on the other hand, has a very high melting point as a polymer, and is nigh impossible to use for custom tubing through an extrusion process, unless certain preparations are made in advance before production begins. It is also not as easy to use as is one of the off the shelf polymers that come in resin bead form, either. The original extrusions done in the past required a wire core to be inserted into the mold and the PTFE extruded tubing was created around it so it would not collapse on itself, because it was that delicate. Today's extrusion requires a refined set of steps to get the complete product, and that is what we will cover next.

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