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Teflon AF silicon wafer semiconductorTeflon™ AF (amorphous fluoropolymer) resins have the same excellent optical clarity and mechanical properties of amorphous polymers. They have the same chemical resistance, inertness and other typical properties of fluoropolymers. These resins also perform well over a wide range of temperatures and maintain outstanding electrical properties. A unique chemical structure enhances their versatility and distinguishes this class from other fluoropolymers. The ability to put these resins in solution allows for applications in thin layers and on lower temperature substrates since high temperature “sintering” is not required.

Products

Teflon™ AF is available as a powdered resin or solution in two grades:

AF 1600X (*Tg 160 °C [320 °F])

AF 2400X-J (Tg 240 °C [464 °F])

*Tg = Glass Transition Temperature

Teflon™ AF Resins
AF 1600X
AF 2400X-J

Teflon™ Solutions
AF 2400 1%  –  Safty Data Sheet
AF 1601 6%
AF 1601 18%

Properties

  • Compared to other fluoropolymers, AF has a low refractive index, high optical transmission.
  • It is stiffer and has higher tensile modulus.
  • Low dielectric constant unaffected by humidity.
  • Lower melting point, solubility in several perfluorinated solvents at room temperature.
  • Processing: polymer can be extruded, injection molded, casted from solution

Applications

Teflon AF polymer pelletsTeflon™ AF resins can be used in unlimited applications to meet current and future material challenges.

  • Optical Materials
    • Teflon™ AF products offer plenty of flexibility. They function as a clear coating for optical devices requiring a low refractive index. They also perform well in aggressive chemical environments with disparate temperatures and light waves (UV-IR).
    • Applications in this category includes lens covers for microwave, radar, and optical devices; fiber optics, optical cladding; optoelectronic devices; UV cells and windows; passivation and protective coatings; and anti-reflective coatings for optical devices.
  • Degassing
    • Due to its structure, Teflon™ AF can be used in membranes for liquid/gas separation applications.
  • 3D Printing
    • The optical clarity and gas permeability of films made with Teflon™ AF products enable efficient 3D printing and manufacturing.
  • Semiconductors and Processing Materials
    • Thanks to good dimensional stability, rigidity at high-use temperatures, and chemical inertness, Teflon™ AF products provide critical electrical properties for the next generation of computer chips.
  • Dielectric Materials
    • Teflon™ AF products are easy to mold and spin cast. Other uses include passivation layers and encapsulation for hybrid/sandwich integrated circuit packaging.
  • Biomedical Materials
    • Teflon™ AF solutions can be coated onto other substrates to enhance biocompatibility for optical sensing and diagnostic applications. They can also be used as a potential separation media for gasses and liquids.

Processing Resins

Teflon™ AF can be compression molded, injection molded, or extruded. Through these processes, various solid shapes can be formed using the product. Forms include rods, tubes, bars, and sheets of various thicknesses.

Typical molding temperatures for Teflon™ AF 1600 range from 240–275 °C (464–527 °F); for Teflon™ AF 2400, the range is 340–360 °C (644–680 °F). The polymer begins to decompose above 360 °C (680 °F). Processing above that temperature should be avoided. Corrosion-resistant tooling/equipment is recommended similar to that used in processing other fluoropolymer resins like Teflon™ FEP and Teflon™ PFA.

Processing and Use PDF

Processing Solutions

Teflon™ AF 1601 is supplied as a 6% and 18% solution in Fluorinert® FC-40. Teflon™ AF 2400 is supplied as a 1% solution in Fluorinert® FC-40. These solutions can be cast into thin or thick coatings using a variety of techniques, including spinning, spraying, brushing, and dipping.

Whichever coating methods are used, the coated product must be heated above the Tg (160 °C [320 °F]) or (240 °C [464 °F]) to remove all solvent. This gives a smoother coating and improves the polymer’s adherence to the surface. For additional information on adhesion, see the Chemours technical bulletin, “Adhesion Guide for Teflon™ AF.”

Processing Guide PDF

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