Construction
A
PTF heater starts with a high grade, low shrinkage polyester substrate
in sheet or roll form. A
polymeric, silver-based paste is screen printed onto the polyester
in the desired circuit pattern. This sheet or roll is then oven
dried to cure or “set” the element. The circuits are
then die cut apart.
The
next step is to add the terminals for lead attachment. The open
face circuit is then covered with a double-sided pressure sensitive
adhesive (PSA) tape on a polyester substrate. One side of the
PSA joins the top and bottom layers of the heater. The other side
of the PSA is used to apply the heater to the desired part to
be heated.
Features
By using printed thick
film technology, heat is spread evenly and efficiently across
the surface. This leads to very cost effective heating systems.
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