Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Characteristics
ETFE is a partially fluorinated thermoplastic resin that is melt flow processible. Duro-Bond E-CTFE sheet lining is available in thicknesses of 60 mils (1.5 mm) and 90 mils (2.3 mm).
- Advantages
- Duro-Bond E-CTFE fluoropolymer sheet lining exhibits outstanding chemical resistance, being virtually unaffected by many of the corrosive chemicals commonly encountered in the chemical process industry.
- Duro-Bond E-CTFE is resistant to strong mineral and oxidizing acids, alkalis, metal etchants, liquid oxygen and essentially all organic solvents. Typical of the fluoropolymers, E-CTFE is attacked by metallic sodium and potassium. Rate of attack is a function of exposure time and temperature.
- Duro-Bond E-CTFE sheet lining provides substrate protection by virtue of its excellent permeation resistance. The E-CTFE fluoropolymer has extremely low permeability to water vapor and various other gasses. The ECTFE fluoropolymer also exhibits low permeability to liquid chemicals. It also has excellent resistance to abrasion.
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Uses
- Duro-Bond E-CTFE is used as a vessel lining material to provide chemical resistance to acids, bases, oxidizing agents, organic solvents and other corrosive media. Duro-Bond E-CTFE can be applied to tanks, scrubbing towers, reactors, valves, columns, agitators and other process equipment for handling corrosive materials.
- When a combination of chemical, temperature, abrasion and permeation resistance is required Duro-Bond E_x0002_CTFE is often a cost-effective solution to severe corrosion problems.
- Application
The method of application is as follows:
1. The surface to be lined is properly cleaned and grit blasted to a white metal finish to provide a suitable surface for bonding. (See Electro Chemical Technical Bulletin #1, “Specification for Welded Steel Tanks, Stacks, Ducts or Other Fabricated Equipment for Protective Linings and/or Coatings”.)
2. The Duro-Bond E-CTFE laminate is cut into panels to cover the entire area to be lined with a minimum amount of joints to be welded.
3. The panels are then cemented into position and the seams welded with Duro-Bond ECTFE rod and E-CTFE cap strip using a thermoplastic welding gun with nitrogen gas as the inert atmosphere.
- Method of Testing
- All lined surfaces are visually inspected for surface defects. Any special dimensional tolerances required after lining are also checked.
- All lined areas are then spark tested for pinhole leaks using a dielectric spark tester adjusted to 10,000 volts. The tester is moved constantly and quickly over the lining surface to prevent a burn through.
- Repair Procedure
Duro-Bond E-CTFE sheet lining can be shop or field repaired. The repairs to defective or damaged areas in the sheet lining are accomplished by cutting out the faulty area, grinding or grit blasting the substrate surface, preparing a piece of sheet of the same dimension, cementing it into position and subsequently welding the joints as described under Application. The repaired area is then inspected and spark tested to insure lining integrity.
Properties
- Physical Form
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Chemical Characterization | Thermoplastic fluoroCarbon polymer | — | — |
| Melting point | 240.0 | °C | — |
| Upper Service Temperature | 160.0 | °C | — |
| Density (23°C) | 1.69 | g/cm3 | — |
| Tensile Strength | 42 -48 | N/mm2 | — |
| Elongation at Break | 200.0 | % | — |
| Solubility in water | Insoluble | — | — |
| Hardness Durometer | D 75 | — | — |
| Water Absorption | max. 0.03 | — | — |
| Oxygen Index | min. 30 | % | — |
| Flammability | V-0 | — | — |
| Thermal Expansion Coefficient 23 -150°C | 5 - 8 x 10-5 | mm/mm/°C | — |
Technical Details & Test Data
- Service Temperature
E-CTFE fluorocarbon resins withstand continuous service temperatures as high as 150°C & (300°F). When bonded to a substrate, the maximum recommended service temperature for Duro-Bond FEP sheet lining is 110°C(230°F) on a continuous basis, 120°C(250°F) on an intermittent basis.