Method of forming a molecularly polarized polmeric sheet into a non-planar shape
AssigneeRaytheon Company
InventorsDavid T. Wilson, Neil T. Dionesotes, Paul F. Roman
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Abstract
A method for forming sheets of polarized PVDF into non-planar shaped bodies is described. The technique includes the steps of shaping the polymer material by disposing a sheet of the polymer material about a non-planar surface and subjecting the sheet of polymer material and said non-planar surface to an elevated temperature for a predetermined period of time until said non-planar shape is permanently imparted to the sheet of molecularly polarized polyvinylidenefluoride material.
Claims13
A method of forming a sheet of molecularly polarized polymer material into a non-planar shape after said material has been molecularly polarized, comprises the steps of:
- disposing said sheet of polymer material about a mold having a selected non-planar shape selected to impart a desired non-planar shape to said sheet;
- and
- heating said sheet and mold to an elevated temperature above the thermal setting temperature of the material but below the piezoelectric transition temperature of the material for a predetermined period of time.
A method of forming a sheet of molecularly polarized polyvinylidenefluoride into a non-planar shape comprises the steps of:
- disposing the sheet of polarized PVDF about a mandrel having a desired complimentary non-planar shape;
- heating said polarized sheet disposed about the mandrel by subjecting the sheet and mandrel to an elevated temperature in the range of about 60.degree. C. to 100.degree. C. for a period of time of about 1 hour to 24 hours;
- and
- removing said sheet of polyvinylidenefluoride having imparted thereto the desired non-planar shape.
Dependencies are inferred from the claim text.