Bob Lunn
10/21/97 09:51 AM


> Kynar is a plastic, doubtless copyrighted by somebody like
> DuPont. It has the virtue of extreme toughness, good insulation
> properties and high temperature resistance. This makes it valuable
> as insulation on the special solid wire used for wire-wrap connections,
> and as a substrate for the transducer film mentioned above.

     Just to clarify this.  In piezoelectric transducers using Kynar
     it _is_ the Kynar that has the piezoelectric properties (the above
     para could be read to imply that the Kynar is acting as a mechanical
     substrate only).

     Of course, the desirable chemical and mechanical properties of
     Kynar make it attractive in a wide range of applications.  I've
     experimented with Kynar film as a load sensor for in-motion weighing
     of large trucks.

     BTW, Kynar is a registered trademark of Elf Atochem and is simply
     a trade name for a type of PVDF (polyvinylidene fluoride).

___Bob