DuPont™ Teflon® aqueous dispersions are milky white dispersions of PTFE particles in water, stabilized by wetting agents. They can be further formulated to meet specific needs by adding other solid or liquid ingredients. These aqueous dispersions offer a practical method for coating or impregnating using a resin that does not respond to traditional solvent or melt-processing techniques.
What's New in Teflon® Dispersions ...
Using new polymer technology and a cleaner, more effective new wetting agent, DuPont introduces a new generation of high-performance Teflon® PTFE dispersion products.
Processing
Yard goods made from Teflon® aqueous dispersions can be dip-coated with repeated passes until the final desired thickness is obtained. The water is then removed and the other ingredients deactivated. The dried resin particles can be coalesced by heat into a continuous coating or the substrate can remain coated, or impregnated, with unmelted particles. Both glass fabric and synthetic substrates can be processed.
Grades, Characteristics, and Applications
PTFE
| Standard Grade |
Resin
Characteristics |
Applications |
30
[.pdf] |
General-purpose resin composed of 60% PTFE dispersed in water. Contains a nonionic surfactant. |
Impregnated woven packings Seals Coated glass cloth Cast films |
30B
[.pdf] |
Resin composed of 60% PTFE dispersed in water. Provides improved gloss and rewetting qualities during the coating process. |
Coated glass fabrics for many food and industrial uses |
304A
[.pdf] |
Thickened dispersion with 45% PTFE solids. |
Roller coating applications such as gaskets |
306A
[.pdf] |
Dispersion with 60% PTFE solids. |
Prime coat for high dielectric strength glass cloth |
307A
[.pdf] |
Small particle size dispersion with 60% solids and a nonionic surfactant. |
Impregnation Metal coating |
313A
[.pdf] |
Resin composed of 58% PTFE dispersed in water. Similar to PTFE 30B except 313A has better gloss and slightly better wetting. |
Coated glass fabrics |
B
[.pdf] |
Resin composed of a special formulation for unsintered coatings. |
High-performance, woven glass filter bags |
35
[.pdf] |
Resin composed of 32% PTFE dispersed in water with an anionic surfactant. |
For co-coagulation to make filled bearings |
K-20
[.pdf] |
33% PTFE solids. Contains approximately 3.5% (by weight of PTFE) of a nonionic wetting agent and stabilizer. |
Used to reduce dust levels |
TE-3823
[.pdf] |
60% PTFE solids. Contains approximately 6% (by weight of PTFE) of a nonionic wetting agent and stabilizer. |
Used to coat woven glass cloth Electrical insulation Cast film |
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