Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Characteristics
It consists of a layer of modified PTFE (PTFE-M) laminated onto a fiber knit backing that is readily bonded to steel, concrete, or FRP substrates. Duro-Bond PTFE-M sheet lining is available in thicknesses of 80 mils (2.0 mm) and 120 mils (3.0 mm).
- Advantages
- Duro-Bond PTFE-M linings provide a broad range of chemical resistance which far exceeds the corrosion protection of other plastic, glass, and high nickel alloy materials.
- The glass knit fabric backing is partially imbedded into the PTFE-M film thus providing a strong integral bond and also providing a surface that can be successfully bonded to various substrates.
- The weak attraction between PTFE-M and other molecules provides for a slick, smooth, non-sticking outer surface and thereby makes Duro-Bond PTFE-M an ideal choice for applications requiring good release characteristics.
- PTFE-M, from which Duro-Bond PTFE-M sheet lining is produced, has FDA acceptance and can be used successfully in applications where a high level of purity is required.
- Chemical Resistance
Duro-Bond PTFE-M glass backed sheet lining is chemically inert and solvent resistant to virtually all chemicals except molten alkali metals, fluorine and certain complex halogenated compounds such as chlorine trifluoride at elevated temperatures. The following table lists numerous representative chemical reagents and solvents with which Duro-Bond PTFE-M film is compatible.
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Uses
Duro-Bond PTFE-M lined equipment is used in many corrosive and High purity applications. The outstanding corrosion protection provided by Duro-Bond PTFE-M 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 PTFE-M 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 PTFE-M 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 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 10,000 volts. The tester is moved constantly and quickly over the lining surface to prevent a burn through.
- Repair Procedure
Duro-Bond PTFE-M 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 | — | — |
| Upper Service Temperature | 260.0 | °C | — |
| Density (23°C) | 2.12 | g/cm3 | — |
| Tensile Strength | 20 - 40 | N/mm2 | — |
| Elongation at Break | 140 - 400 | % | — |
| 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 | 12-20 x 10-5 | mm/mm/°C | — |
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Service Temperature
PTFE-M fluorocarbon resins withstand continuous service temperatures as high as 260°C(500°F).When bonded to a substrate, the maximum recommended service temperature for Duro-Bond PTFE-M sheet lining is 110°C (230°F) on a continuous basis, 120°C (250VF) on an intermittent basis.
Safety & Health
- Hazards
- Thermal decomposition - PTFE-M starts to decompose at 260°C
- Hazardous decomposition products - Gaseous fluorinated hydrocarbons (fluoro-olefins, carbonyl fluoride and hydrogen fluoride). Scrap PTFE-M must not be incinerated.
- Hazardous reactions - Traces of COF2 are evident at around 350°C.
- Transportation classifications - PTFE-M is not classified as a hazardous material. No special precautions or procedures need be followed to transport PTFE-M resin or semi-finished products
- Safety Issues
PTFE-M resins are nonvolatile and safe at normal room temperatures. Good safety practice requires the use of adequate ventilation and respirators when processing PTFE-M. Heating PTFE-M 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 PTFE-M Material Safety Data Sheet for detailed recommended procedures for the safe handling and use of PTFE-M.