Teflon™ PFAD 335D
Fluoroplastic Resin

PFA Aqueous Dispersion

Product Information
Product Description
Teﬂon PFAD 335D is an off-white aqueous perfluoroalkoxy(PFA) dispersion stabilized with a non-ionic surfactant. It isa general-purpose dispersion that can be used to impartsome of the unique properties of PFA to end products thatwould be difficult to make using traditional melt extrusion
processes. It can be used to coat or impregnate porous
structures or to make thin films. It can be coated and melt
bonded to polytetrafluoroethylene (PTFE) resin or used as ahot melt adhesive.
™

The PFA resin in Teﬂon™ PFAD 335D is a melt flowable
thermoplastic, providing superior properties typical offluoroplastic resins: retention of properties after service at
260 °C (500 °F) and useful properties at –240 °C (–400 °F).
Teﬂon™ PFAD 335D aqueous dispersion provides:• Inertness to nearly all industrial chemicals and solvents• Stability at high temperatures• Excellent dielectric properties• Excellent weatherability• Excellent anti-stick properties

Typical Applications• Heat-sealable top coatings for PTFE-coated fabrics forbelting, circuit boards, architectural fabrics, and electricalinsulation• Cast film for capacitor dielectrics or chemical barriers• Hot melt adhesive for PTFE, PFA, and FEP parts• Metal coatings

Food Contact Compliance
Properly processed products (sintered at high temperaturescommon to the industry) made from Teflon™ PFAD 335D
resin can qualify for use in contact with food in compliancewith FDA 21 CFR 177.1550 and European Regulation (EU)No. 10/2011. For details and information, please contact
your Chemours sales representative.

Processing
Conventional coating techniques, such as dip, spray, spin, orroller coating, can be used for coating or impregnating hightemperature materials with Teﬂon™ PFAD 335D. Thin coats,usually less than 5 µm (0.2 mil), are applied to prevent mudcracking as the coating dries. The water is normally removed
at 120 °C [250 °F], followed by heating to remove thewetting agent (typically at 250–270 °C [482–518 °F]). Finalconsolidation is done above the 305 °C (581 °F) melt point.
If the Teﬂon™ PFAD 335D is being used as a top coat overa PTFE coated fabric or other parts, the coating must be
heated to melt the PTFE (approximately 337 °C [639 °F])
to maximize adhesion. Prolonged heating above 370 °C(698 °F) should be avoided, as this could lead to thermal
degradation of the Teﬂon™ PFAD 335D polymer.
Other solid or liquid ingredients can be added to Teﬂon™ PFAD
335D to provide speciﬁc processing or ﬁnished productbehavior.

Safety Precautions
Before processing any fluoroplastics, read the Material
Safety Data Sheet, available upon request from ourCustomer Service Group at (844) 773-CHEM/2436 in theU.S. or (302) 773-1000 outside of the U.S. Also read thedetailed information in the latest edition of the “Guide tothe Safe Handling of Fluoropolymer Resins,” published by
the Fluoropolymers Division of The Society of the Plastics
Industry (www.fluoropolymers.org) or by PlasticsEurope(www.plasticseurope.org).

Storage and Handling
Teflon™ PFAD 335D must be properly stored to maximize
the stability of the dispersion. The PFA particles will
settle on prolonged standing and/or on prolonged heating;temperatures above 40 °C (104 °F) should be avoided. Thedispersion must be protected from freezing, which will cause

Teflon™ PFAD 335D

Fluoroplastic Resin

irreversible settling. The optimum storage temperature range
is 7–24 °C (45–75 °F). If dispersions are to be stored forextended periods, lower-temperature storage is desirable.
For optimal performance, Teflon™ PFAD 335D should begently mixed or rolled monthly and prior to use.

Storage and handling areas should be clean. Keep dispersion
drums closed and clean to avoid both contamination andcoagulation by drying at the liquid surface. High processing
temperatures will cause even very small foreign particles tobecome visible or to make defects in ﬁnished products. Good
housekeeping and careful handling are essential.

Ammonium hydroxide is used by Chemours to set the pH to
9.5-11.0 at the time of shipment. High ambient temperatures
can deplete the ammonium hydroxide level and reduce thepH. Declining pH eventually favors bacterial growth, whichcauses odor and scum. The pH of opened containers shouldbe measured and maintained between 9.5 and 11.0.
High-speed stirring, pumping, or any other violent agitation
should be minimized to prevent coagulation and to minimize
foaming. Ideally, the dispersion should be conveyed by gravity
from storage to processing stations.

PackagingTeflon™ PFAD 335D is packaged in 114-L (30-gal)
non-returnable drums and 1,000-L (264-gal) recyclable
containers. Contact the local Chemours sales office for
package sizes available in your specific geographic area.

Table 1: Typical Property Data for Teflon™ PFAD 335D Fluoroplastic Resin
Property

Test Method1

Unit

Typical Value
60

Solids Content (% PFA by weight)

ASTM D4441-04

ISO 12086%% Surfactant Based on PFA SolidsASTM D4441-04

ISO 12086%Density of Dispersion (at 60% solids)

ASTM D4441-04

ISO 12086

g/cm

1.50

Chemoursµm

0.20

Dispersion Particle Size, average diameter63

pH of Dispersion

ASTM E 70

ISO 1148

Brookfield Viscosity (at 25 °C [77 °F])

ASTM D 2196

ISO 2555

MPa·s

2510Melting Temperature

ASTM D 2116

ISO 12086°C (°F)305 (581)

Melt Flow Rate (MFR 372/5.0)

ASTM D 2116

ISO 12086

g/10 min2

Typical properties are not suitable for specification purposes.

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 tothe 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.

For more information, visit teflon.com/industrial
For sales and technical support contacts, visit teflon.com/industrialglobalsupport© 2020 The Chemours Company FC, LLC. Teflon™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
Replaces: K-25401
C-10109 (3/20)