DuPont™ Teflon® PFA 9725
Molding and Extrusion Resin
General Purpose
A general-purpose fluoroplastic resin available as loosely compacted fluff, with a typical melt flow rate of 1.7.
Applications
DuPont™ Teflon® PFA TE9725 is an ideal resin for applications involving compounding and compression molding, as well as extruded tubing and other profiles for hose, electrical insulators, and sleeving; industrial film and products made from film; and injection or blow-molded articles requiring superior electrical, chemical, and thermal properties. Teflon® PFA TE9725 offers a slightly lower melt flow rate than Teflon® PFA TE9724, ultimately providing a higher degree of stress-crack resistance.
Product Information
For inventory control purposes product name may be followed by an X.
Products labeled PFA 9725 and PFA 9725 X are equivalent and all information in this document is applicable to both.
Typical Application
DuPont™ Teflon® PFA 9725 is an ideal resin for applications involving compounding and compression molding, as well as extruded tubing and other profiles for hose, electrical insulators, and sleeving; industrial film and products made from film; and injection or blow-molded articles requiring superior electrical, chemical, and thermal properties. Teflon® PFA 9725 offers a slightly lower melt flow rate than Teflon® PFA TE9724, ultimately providing a higher degree of stress-crack resistance.
Description
DuPont™ Teflon® PFA 9725 is a general purpose fluoroplastic resin available as loosely compacted fluff. It is intended for use in special application processes in consultation with DuPont. Compared with other grades of Teflon® PFA, its most unique features are a relatively low flow rate and properties that make it suitable for a variety of processes and demanding end uses, especially compounding and compression molding. Table 1 shows the typical property data for Teflon® PFA 9725.
Teflon® PFA 9725 is used when traditional extrusion and molding processes are required for producing products with the superior properties of a fluoroplastic resin. Compared to other thermoplastics, the high melt strength and thermal stability of Teflon® PFA 9725 can be used to improve processing rates. Compared with other thermoplastics, Teflon® PFA 9725 provides a superior balance and level of end-use properties at high service temperatures. Teflon® PFA 9725 combines the processing ease of conventional thermoplastics with many properties similar to those of polytetrafluoroethylene.
Properly processed products made from neat Teflon® PFA 9725 resin provide the superior properties characteristic of fluoroplastic resins: chemical inertness, exceptional dielectric properties, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, negligible moisture absorption, low flammability, performance at temperature extremes and excellent weather resistance.
In a flame situation, products of Teflon® PFA 9725 resist ignition and do not promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke.
Processing
Teflon® PFA 9725 can be processed by conventional melt extrusion and by injection, compression, and transfer molding processes. High melt strength and heat stability permit the use of relatively large die openings and high temperature drawdown techniques that increase production rates. Reciprocating screw injection molding machines are preferred. Corrosionresistant metals should be used in contact with molten fluoroplastic resin. Extruder barrel should be long, relative to diameter, to provide residence time for heating the resin to approximately 390℃ (730℉). For more detailed processing information, including recommended draw-down ratios, consult your DuPont representative.
Safety Precautions
WARNING! VAPORS CAN BE LIBERATED THAT MAY BE HAZARDOUS IF INHALED.
Open and use containers only in well-ventilated areas using local exhaust ventilation (LEV). Vapors and fumes liberated during hot processing of Teflon® PFA 9725 should be exhausted completely from the work area. Contamination of tobacco with these polymers must be avoided. Vapors and fumes liberated during hot processing and which are not properly exhausted, or from smoking tobacco or cigarettes contaminated with Teflon® PFA 9725 may cause flu-like symptoms such as chills, fever and sore throat. This may not occur until several hours after exposure and will typically pass within about 24 hours. Mixtures with some finely divided metals, such as magnesium or aluminum, can be flammable or explosive under some conditions.
Storage and Handling
The properties of Teflon® PFA 9725 resin are not affected by storage time. Ambient storage conditions should be designed to avoid airborne contamination and water condensation on the resin when it is removed from containers.
Freight Classifications
DuPont™ Teflon® PFA 9725 resin is classified as “Plastics, Materials, Pellets.”
Table 1: Typical Property Data for Teflon® PFA 9725 |
PROPERTY |
TEST METHOD |
UNIT |
TYPICAL VALUE |
GENERAL |
|
Melt Flow Rate |
ISO 12086 |
ASTM D3307 |
g/10min |
1.7 |
Melting Point |
- |
ASTM D4591 |
℃(℉) |
305(581) |
Specific gravity |
- |
ASTM D792 |
- |
2.15 |
MECHANICAL |
|
Tensile Strength |
ISO 12086 |
ASTM D3307 |
MPa(psi) |
|
23℃(73℉) |
|
|
|
26(3,800) |
Ultimate Elongation |
ISO 12086 |
ASTM D3307 |
% |
|
23℃(73℉) |
|
|
|
300 |
Flexural Modulus |
ISO 178 |
ASTM D790 |
MPa(psi) |
|
23℃(73℉) |
|
|
|
625(90,000) |
MIT Folding Endurance(0.20mm,8mils film) |
- |
ASTM D2176‡ |
Cycles |
500,000* |
Hardness Durometer |
ISO 868 |
ASTM D2240 |
- |
D55 |
ELECTRICAL |
|
Dielectric Strength,Short Time,0.25mm(0.010 in) |
IEC 243 |
ASTM D149 |
kV/mm(V/mil) |
80(2,000) |
Dielectric Constant,1 MHz(106Hz) |
IEC 250 |
ASTM D150 |
- |
2.03 |
Dissipation Factor,1 MHz(106Hz) |
IEC 250 |
ASTM D150 |
- |
<0.0002 |
Volume Resistivity |
ISO 1325 |
ASTM D257 |
ohm•cm |
1018 |
OTHER |
|
Water Absorption,24h |
- |
ASTM D570 |
% |
<0.03 |
Weather and Chemical Resistance |
- |
- |
- |
Outstanding |
Limiting Oxygen Index |
ISO 4589 |
ASTM D2863 |
% |
>95 |
Flammability Classification† |
- |
UL 94 |
- |
V-0 |
* Depending on fabrication conditions
‡ Historical standard
† These results are based on laboratory tests under controlled conditions and do not reflect performance under actual fire conditions,current rating is a typical theoretical
value.
Note: Teflon® PFA 9725 meets the requirements of ASTM D3307,Type I Typical properties have been determined on the pelletized form of this product and are not suitable for specification purposes.
Statements or data regarding behavior in a flame situation are not intended to reflect hazards presented by this or any other material when under actual fire conditions. |