Teflon™ FEP 9835
Fluoroplastic Resin

Product Information
For inventory control purposes, product name may be followed by an X.
Products labeled FEP 9835 and FEP 9835 X are equivalent, andall information in this document is applicable to both.

Typical Applications
Applications for Teflon™ FEP 9835 include small diameter, thinwall wire and cable insulation; industrial film; and intricate or thinwall parts made by injection molding.

Description
Teflon™ FEP 9835 is a melt-processible fluoroplastic resin
available in pellet form. It is a copolymer of tetrafluoroethylene
and hexafluoropropylene, without additives, that meets therequirements of ASTM D 2116 Type II. With a relatively high melt
flow rate and excellent electrical properties, Teflon™ FEP 9835
has been specifically designed for high-speed extrusion of thincoatings on small-gauge wires for twisted-pair constructions.
Table 1 shows the typical property data for Teflon™ FEP 9835.
As shown in Table 1, this resin provides the electrical andmechanical properties needed for low voltage applications. Inaddition, Teflon™ FEP 9835 has a higher melt flow rate than mostother fluoroplastic resins. This permits higher extrusion speeds
and easier processing, making Teflon™ FEP 9835 a cost-effective
alternative for producing thin-wall extrusions.
Teflon™ FEP 9835 is designed and made to have improved
adhesion to copper wire under specific wireline process conditions,
low dissipation factor at high frequencies, and significant plate-out
resistance in melt extrusion. It is suitable as a solid insulator andas a foamed insulator, when used with an appropriate nucleant in anitrogen gas injection process.
Teflon™ FEP 9835 is used when traditional extrusion andmolding processes are required for producing products with thesuperior properties of a fluoroplastic resin. Compared to otherthermoplastics, the high melt strength and thermal stability ofTeflon™ FEP 9835 can be used to improve processing rates.
Compared with other fluoroplastics, creep resistance at highservice temperatures provides a superior balance and level ofend-use properties. Teflon™ FEP 9835 combines the processing
ease of conventional thermoplastics with many properties similar
to those of polytetrafluoroethylene.
Properly processed products made from neat Teflon™ FEP 9835
resin provide the superior properties characteristic of fluoroplastic
resins: chemical inertness, exceptional dielectric properties, heatresistance, toughness and flexibility, low coefficient of friction, nonstick characteristics, negligible moisture absorption, low flammability,
performance at temperature extremes, and excellent weather resistance.
In a flame situation, products of Teflon™ FEP 9835 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™ FEP 9835 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 draw-down techniques that increase production
rates. Reciprocating screw injection molding machines are preferred.
Corrosion-resistant metals should be used in contact with molten
fluoroplastic resin. Extruder barrel should be long, relative to diameter, toprovide residence time for heating the resin to approximately 400 °C (750°F). For more detailed processing information, including recommended
draw-down ratios, consult your Chemours sales representative.

Safety Precautions
Before using Teflon™ FEP 9835 resin, refer to the Material Safety Data
Sheet and the latest edition of “The Guide to the Safe Handling ofFluoropolymer Resins,” published by The Society of the Plastics Industry, Inc.
(www.fluoropolymers.org) or by PlasticsEurope (www.plasticseurope.org).
Open and use containers only in well-ventilated areas using local
exhaust ventilation (LEV). Vapors and fumes liberated during hot
processing of Teflon™ FEP 9835 should be exhausted completely fromthe work area. Contamination of tobacco with these polymers must
be avoided. Vapors and fumes liberated during hot processing thatare not properly exhausted, or from smoking tobacco or cigarettes
contaminated with Teflon™ FEP 9835, 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 of Teflon™ fluoroplastic resin with some finely divided metals,
such as magnesium or aluminum, can be flammable or explosive undersome conditions.

Storage and Handling
The properties of Teflon™ FEP 9835 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.

Packaging
Teflon™ FEP 9835 is supplied as pellets and is available in 25-kg single
layer plastic bags and in 1,000-kg bulk containers.

Fluoroplastic Resin

Teflon™ FEP 9835

Table 1: Typical Property Data for Teflon™ FEP 9835 Fluoroplastic Resin
Property

Test Method1

Unit

Typical ValuePROCESSING
Melt Flow Rate (MFR at 372 °C [702 °F]/5.0 kg)

ISO 12086

D 2116g/10 min20

Specific Gravity

ISO 1183

D 792

—

2.15

—

Chemours

1/s

150

Tensile Strength, 23 °C (73 °F)

ISO 12086

D 638

MPa (psi)

24 (3,500)

Ultimate Elongation, 23 °C (73 °F)

ISO 12086

D 638

%300

Flexural Modulus, 23 °C (73 °F)

ISO 178

D 790

MPa (psi)

520 (75,500)—

D 21762

Cycles

12,000

ISO 868

D 2240—

D 55

Dielectric Constant, 1 MHz

IEC 250

D 150

—

2.03

Dielectric Constant, 1 GHz

IEC 250

D 2520—

2.03

Dissipation Factor, 1 MHz

IEC 250

D 150—

0.0006

Dissipation Factor, 1 GHz

IEC 250

D 2520—0.0005

Dielectric Strength, Short Time, 0.25 mm (0.010 in) Film

IEC 243

D 149kV/mm (V/mil)

80 (2,000)

Critical Shear Rate (372 °C/702 °F)

MECHANICALMIT Folding Endurance (0.20 mm, 8 mil film)
Hardness, Shore Durometer

ELECTRICALTHERMAL—

D 4591°C (°F)

255 (491)

ISO 4589

D 2863

%

> 95

—

UL 94

—

V-0

Water Absorption, 24 hr

—

D 570

%

<0.01

Weather and Chemical Resistance———

Excellent

Melting Point
Limiting Oxygen Index
Flammability Classification3, 4OTHER

Note: Teflon™ FEP 9835 meets the requirements of ASTM D 2116, Type II.
Typical properties 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.
1
ASTM method unless otherwise specified.
2
Historical standard.
3
These results are based on laboratory tests, under controlled conditions, and do not reflect performance under actual fire conditions.
4Current rating is a typical theoretical value.

HOW TO USE THE TEFLON™ BRAND NAME WITH YOUR PRODUCTTeflon™ is a registered trademark of Chemours for its brand of fluoroplastic resins, coatings, films, and dispersions. The Teflon™ brand name is licensed by Chemours in association with approved
applications. Without a trademark license, customers may not identify their product with the Teflon™ brand name, as Chemours does not sell such offerings with the Teflon™ trademark. Unlicensed
customers may refer to the Chemours product offering with only the Chemours name and product code number descriptor as Chemours sells its product offerings. There are no fair use rights or
exhaustion of rights to use the Teflon™ trademark from buying from Chemours, a Chemours customer, or a distributor without a trademark license from Chemours.
If you are interested in applying for a trademark licensing agreement for the Teflon™ brand, please visit www.teflon.com/license
CAUTION: Do not use or resell Chemours™ materials in medical applications involving implantation in the human body or contact with internal body fluids or tissues unless agreed to by Seller in a writtenagreement covering such use. For further information, please contact your Chemours representative. For medical emergencies, spills, or other critical situations, call (866) 595-1473 within the UnitedStates. For those outside of the United States, call (302) 773-2000.
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present
no health or safety hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any useof this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate under or arecommendation to infringe any patents.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISEWITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.

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Replaces: K-26541
C-10094 (3/20)