Rolls, sheets and custom fabricated parts. Available also with adhesive coating.

PET-Polyester film

Typical values for 23 microns thick materials
Property	Typical values
Density	1,395
Ultimate tensile strength	1,750 kg/cm²
Stress to produce 5% elongation	1.050 kg/cm²
Tensile modulus	38,500 kg/cm²
Folding endurance (MIT)	14,000 Zyklen
Moisture absorption	< 0,8%
Fungus resistance	inert
Copper corrosion	negligible
Dielectric strength 25°C	280 KV/mm
Dielectric strenght 150°C	200 KV/mm
Dielectric constant	3,30
Dissipation Factor	0,0025
Volume resistivity	1x1018 cm
Surface resistivity	1x1018 cm
Melting point	250-265°C
Service temperature	-60:+150°C
Coefficient of thermal expansion	1,7x10 cm/cm/°C
Shrinkage at 150°C	2-3%
Thicknesses available (microns)	12-23-36-50-75-100-125-190-250-350

Materials for Membrane touch switches
Politherm
Heat stabilized PETP (polyester) film. Plain or treated for adhesion of coatings.
75-100-125 or 190 µ thick.
Shrinkage: see graph

Typical values for 100 microns thick materials
Property	Typical values
Density	2,70
Thickness tolerance	±10%
Purity	99,5%
Tensile strength	6±8kg/mm²
Elongation	14±18%