Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Molecular Structure
- (CF2 -CF2) (CF2 – CF – CF3)
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Product Characteristics
It consists of a layer of FEP laminated onto a fiber knit backing that is readily bonded to steel, concrete, and FRP substrates. Duro-Bond FEP sheet lining is available in thicknesses of 60 mils (1.5 mm) and 90 mils (2.3 mm).
- Chemical Resistance and Other Advantages
Duro-Bond FEP linings provide a broad range of chemical resistance which far exceeds the corrosion protection of other plastic, glass, and high nickel alloy materials. FEP is resistant to virtually all corrosive chemicals and inorganic chemicals, including inorganic bases, oxidizing acids, mineral acids, metal salt solutions, and peroxides. It also exhibits excellent resistance to organic chemicals such as anhydrides, hydrocarbons, functional aromatics, esters, ethers, ketones and most amines.
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Uses
Duro-Bond FEP lined equipment is used in many applications in the chemical and semiconductor industries. The outstanding corrosion protection provided by Duro-Bond FEP broadens equipment service capabilities and extends its useful life. Its broad range of chemical resistance, together with its excellent adhesive bonding characteristics, makes Duro-Bond FEP an ideal lining material for almost any corrosive or high purity application.
- 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 FEP 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 FEP rod and Duro-Bond FEP cap strip using a thermoplastic welding gun.
4. Suitable ventilation and respiration equipment must be used while working with this material.
- 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 1 0,000 volts. The tester is moved constantly and quickly over the lining surface to prevent a burn through.
- Repair Procedure
Duro-Bond FEP 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
- Color
- Physical Form
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Chemical Characterization | Thermoplastic fluoroCarbon polymer | — | — |
| Melting point | 275.0 | °C | — |
| Upper Service Temperature | 205.0 | °C | — |
| Density (23°C) | 2.15 | g/cm3 | — |
| Tensile Strength | 21 - 28 | N/mm2 | — |
| Elongation at Break | 240 - 350 | % | — |
| Solubility in water | Insoluble | — | — |
| Hardness Durometer | D 55 | — | — |
| Water Absorption | max. 0.03 | — | — |
| Oxygen Index | min. 95 | % | — |
| Flammability | V-0 | — | — |
| Thermal Expansion Coefficient 23 -150°C | 14 x 10-5 | mm/mm/°C | — |
Technical Details & Test Data
- Service Temperature
FEP fluorocarbon resins withstand continuous service temperatures as high as 205°C (400°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
Safety & Health
- Safety Issues
FEP resins are nonvolatile and safe at normal room temperatures. Good safety practice requires the use of adequate ventilation and respirators when processing FEP. Heating FEP may produce fumes and gasses that are irritating or toxic. Care must be taken to avoid contamination of smoking tobacco or cigarettes.
Refer to the FEP Material Safety Data Sheet for detailed recommended procedures for the safe handling and use of FEP.