PTFE TAPES AND FILMS

Technical specifications

· Extra-wide widths to 600 mm · Ultra-thin thicknesses Down to 0.038 mm · Exceptional uniformity of thickness · Electronic-grade purity
PTFE films, tapes and sheets are available in perforated and bondable forms, PTFE skived products are made from the finest virgin, electrical-grade resins, which are carefully molded into stress-free billets, then skived with state-of-the art, computer-controlled lathes. The products meet or exceed the requirements of ASTM and MILP-2241 Type II.
THE CHOICE IN AEROSPACE APPLICATIONS PTFE skived film is an economical choice as a release surface in the manufacture of high-temperature composite parts for aerospace applications. It has a continuous use temperature of 260^0C (500^0F) and can withstand higher temperatures for limited periods. The availability of wide widths means that large parts can be molded with minimum seam lines. OUTSTANDING IN ELECTRONIC APPLICATIONS The outstanding purity and thickness-uniformity of PTFE skived film makes it deal for critical electronic applications such as microwave circuit boards. The dielectric constant of PTFE shows less change over a wider range of temperatures and frequencies than any other solid material. EXCELLENT IN ELECTRICAL APPLICATIONS PTFE skived tape is an excellent choice for electrical applications such as wire and cable insulation/dielectric. Its volume resistivity remains in water. Its heat-stability is superior to other forms of PTFE insulation such as slip-on "spaghetti" tubing.
FORMS AVAILABLE · Widths from 10 mm to 600 mm · Thickness from 0.038 mm to 3.2 mm · Cardboard cores standard. Plastic cores by special request · Special forms-bondable, pigmented, perforated, expanded mesh, adhesive-coated · Proprietary treatment for outstanding and uniform bondability. Up to 600 mm wide. One or both sides. STANDARD TOLERANCES Thickness (mm) · 0.051 to 0.076 · 0.089 to 0.25 · 0.28 to 0.38 · 0.41 to 1.02 · 1.04 to 1.55 · 1.58 to 3.18 Width (mm) · ± 0.51 · ± 0.64 · ± 0.89 · ± 1.78
	CHARACTERISTICS
	§ Excellent release properties § High dielectric strength § High deflection temperature § Extraordinary flex life	§ Excellent chemical and weather resistance § Lowest dielectric constant § Excellent arc resistance	pan style="font-size: 11pt; line-height: 150%; font-family: Wingdings;" lang="EN-US">§ Will not support combustion § Heat stable § Low linear coefficient of expansion § Exceptional thickness uniformity

Typical Properties of Poly Fluoro-PTFE Film	Value	ASTM Method
Mechanical Tensile strength N/mm^2 Tensile modulus Ultimate elongation (%) Hardness, Shore D Impact strength, (Izod) J/m Compressive strength N/mm^2 Coefficient of friction film to film Deformation under Load 1hr, 23^0C, 14.2N/mm^2 24 Hrs, 23^0C, 14.2N/mm^2 Permanent deformation	36.5 750 400 53-57 160 118 0.1 11.8 14.3 7.9	D1708 D1708 D1708 D2240 D256 D625 D1894 D621A
Electrical Dielectric strength, kV/mm In air In oil Dielectric constant, 60 Hz at 23^0C 10^6Hz at 23^0C Dissipation factor, 60Hz at 23^0C 10^6 Hz at 23^0C Surface resistivity, ohms	50-170 - 2.1 2.1 <0.0003 <0.0003 >10^17	D149, D150 D257
Thermal Liner coefficient of expansion +23^0 to +100 (MD/CD) (x 10^-6/^0C) +23^0 to +200 +23^0 to + 250 Continuous service temperature, ^0C (depends on application) Melting point, ^0C	MD/125/129 MD/142/152 MD/159/176 250^0C 375^0C	E 831
General Specific gravity Water absorption, (24 hours), % Flammability Oxygen index Refractive index	2.13-2.24 <0.01 V0 >95 1.376	D792 D570 UL94 D2863 D542

POLY FLUORO LTD.

260A. Bommasandra Industrial Area, Hosur Road, Bangalore – 560 099

(: 91-80-27832627. Fax: 91-80-27832549. Mail: sales@polyfluoroltd.com

Note: This Information is based on our experience to date and believed to be reliable. It is intended only as a guide for use at your discretion. We cannot guarantee favourable results and assume no liability for use of this product. A local test programme is always recommended.