Polypyrrole Toluenesulfonate Films for Resistive Ribbon
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
Polypyrrole films meet many of the material requirements for resistive ribbon for use in non-impact printing. The films can be conveniently prepared from non-toxic, inexpensive chemicals to the desired thickness, e.g., 20 microns, and with desired conductivity, 0.6 to 3 Omega/-1/ cm/-1/. Films prepared in acetonitrile containing 0.5-60Percent water are adequately flexible, and the flexibility can be improved by adding glycol or glycerol to the preparative solution. The films are stable up to 350 Degrees C in vacuum, and certainly have a temperature stability in air which is at least as good as nonconducting polyester or polycarbonate polymers presently used.