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Teflon® NXT Benefits

DuPont™ Teflon® NXT fluoroplastic resins open new opportunities for designing and engineering high-performance products. This new DuPont family of chemically modified granular PTFE materials delivers valuable new capabilities while retaining the exceptional chemical, thermal, antistick, and low-friction properties of conventional DuPont PTFE resin.

  • New fabricating versatility with welding
  • Improved permeation resistance
  • Less creep
  • Smoother, less porous surfaces
  • Better high-voltage insulation

Teflon® NXT gives you two wide avenues for application development. You can improve the performance and reduce the cost of tried and true PTFE applications, and you can develop innovative new solutions for parts and products that are currently made of other materials.

Weld it ... Form it

Bond parts by clamping them and putting them in oven under moderate pressure. Bond strength approaches that of the material itself. Use the new thermoforming capabilities to give new shape to your ideas.

This tube was formed during molding by welding together sections of Teflon® NXT and conventional Teflon® PTFE. The more translucent material is Teflon® NXT. When one end was flared under heat and pressure, the weld's strength and tenacity allowed it to be formed without separating.



Reduce Permeation

Vessel linings, tubing, and other products made with Teflon® NXT show improved resistance to chemical permeation compared with standard PTFE.

Parts made of Teflon® NXT have low micro-void content, slowing the transmigration of aggressive liquids and gases.


Comparative Permeation Rates for Teflon® NXT and Conventional PTFE
Permeant Specimen
Thickness, mm (in)
Vapor Liquid Gas
PTFE Teflon®
NXT
PTFE Teflon®
NXT
PTFE Teflon®
NXT
Perchloroethylene 1 (0.04) 5.5 2 13 4 - -
2 (0.08) 1.4 0.1 0.019 0.005 - -
4 (0.16) 0.08 0.05 0.006 0 - -
5 (0.20) 0.055 0.050 - - - -
Hexane 2 (0.08) 3.4 0.2 23.4 0 - -
5 (0.20) 0.045 0.015 - - - -
MEK 2 (0.08) 36.3 23.3 49.4 34.2 - -
5 (0.20) 22.6 20.8 35.5 25.2 - -
HCl, 20% 1 (0.04) 0.4 0.1 - - - -
Helium 2 (0.08) - - - - 93 1
5 (0.20) - - - - 0.18 0.12


Fight Creep

You get more freedom in designing seals, gaskets, and other products, thanks to the improved creep resistance and increased stiffness of Teflon® NXT. Its advantages are particularly marked at elevated temperatures.


Typical Properties of Teflon® NXT and Conventional PTFE
Property Test Method Unit Teflon®
NXT
PTFE
Tensile Strength ASTM D4894 MPa (psi) 31 (4,500) 34 (5,000)
Elongation at Break ASTM D4894 % 450 375
Specific Gravity ASTM D4894
2.17 2.16
Deformation Under Load (Creep), 23°C (73°F) ASTM D695 %

   3.4 MPa (500 psi)
   6.9 MPa (1,000 psi)
   13.8 MPa (2,000 psi)


0.2
0.4
3.2
0.7
1.0
8.2
Deformation Under Load (Creep)-DMA ASTM D695 %

   6.9 MPa (1,000 psi) at 25°C (77°F)
   3.4 MPa (500 psi) at 100°C (212°F)
   1.4 MPa (200 psi) at 200°C (392°F)


5.3
5.4
3.6
6.7
8.5
6.4
Void Content of Typical Parts FTIR-Infrared
spectroscopy
% Compression
Molded: 0-0.5
Compression
Molded: 0-1.5
Dielectric Strength, 76.2 µm (0.003 in) Film ASTM D149 kV/mm
(V/0.001 in)
208 (5,200) 140 (3,500)
Weld Strength
  (Specimens Welded
  after Sintering)
ASTM D4894 % 66-87


Give Contaminants the Slip

Teflon® NXT provides molded or machined parts with smooth, glossy surfaces with low porosity. Component surfaces in, say, semiconductor equipment stay clean because there's virtually no place for contaminants to get a grip.



Step Up the Voltage

Teflon® NXT allows superior high-voltage insulation, giving you new opportunities to improve performance and reduce the cost of electrical connectors, dielectric capacitor films, and other products.



Chemical Process Industry

In the chemical process industry, new Teflon® NXT can significantly improve the performance of equipment linings, seals, gaskets, and other parts.

All applications
The low permeation rate of Teflon® NXT allows you to extend equipment life and reduce maintenance costs and emissions. In some special cases, reduced lining thickness and weight are possible.

Pipe linings
Teflon® NXT lets you reduce costs by replacing bolted flange joints with welded pipe sections. The bonded joints should minimize maintenance and emission monitoring. Cycling tests with steam and cold water have shown no fatigue or blistering of welded linings of Teflon® NXT.

Vessel linings
Teflon® NXT allows you to join liner sections by welding without adhesive and to thermoform liner parts to fit vessel heads, nozzles, and manways. Glass fabric backing can be securely embedded in sheets to help attach linings to substrates.

Gaskets and seals
Take advantage of the improved high-temperature stiffness and creep resistance of Teflon® NXT to design gaskets and seals that better resist deformation to help prevent leaks and allow extended maintenance intervals.

Gaskets and seal rings made of filled and reinforced compounds based on Teflon® NXT offers good stiffness and creep resistence at high temperatures.



Semiconductor Manufacturing

In the chemical process industry, new Teflon® NXT can significantly improve the performance of equipment linings, seals, gaskets, and other parts.

All applications
The low permeation rate of Teflon® NXT allows you to extend equipment life and reduce maintenance costs and emissions. In some special cases, reduced lining thickness and weight are possible.

Pipe linings
Teflon® NXT lets you reduce costs by replacing bolted flange joints with welded pipe sections. The bonded joints should minimize maintenance and emission monitoring. Cycling tests with steam and cold water have shown no fatigue or blistering of welded linings of Teflon® NXT.

Vessel linings
Teflon® NXT allows you to join liner sections by welding without adhesive and to thermoform liner parts to fit vessel heads, nozzles, and manways. Glass fabric backing can be securely embedded in sheets to help attach linings to substrates.

Gaskets and seals
Take advantage of the improved high-temperature stiffness and creep resistance of Teflon® NXT to design gaskets and seals that better resist deformation to help prevent leaks and allow extended maintenance intervals.

Gaskets and seal rings made of filled and reinforced compounds based on Teflon® NXT offers good stiffness and creep resistence at high temperatures.



Electrical and Electronics Industries

The higher dielectric strength, surface smoothness, and high temperature stiffness of Teflon® NXT allow you to improve existing applications for PTFE and develop new uses.

Connectors
Manufacturers can increase voltage ratings for electrical connectors for demanding uses. Smoother surfaces resist performance-degrading soiling, and higher stiffness improves mechanical performance at elevated temperatures.

Capacitor films
Dielectric films made from Teflon® NXT can withstand higher voltages than conventional PTFE material. Therefore, film thickness may be reduced to make smaller capacitors.



Other Industries

The performance of unlubricated bearings, laboratory equipment, seal rings for hydraulic systems, antistick components for handling a range of materials, and many other parts and products now made of conventional PTFE can be improved with Teflon® NXT. We have grades of Teflon® NXT tailored to meet your specific needs, and we can help you gain their benefits.