Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Product Characteristics
PVDF is a partially fluorinated thermoplastic resin that is melt flow processible. Duro-Bond PVDF sheet lining is available in thicknesses of 60 mils (1.5 mm), 90 mils (2.3 mm) and 118 mils (3.0 mm).
- Advantages
- Duro-Bond PVDF is noted for its good resistance to organic and inorganic acids, aliphatic and aromatic hydrocarbons, alcohols and certain halogenated, e.g. chlorinated solvents. It is not attacked by the halogens except nascent chlorine.
- PVDF is non-toxic and may be used according to the Food and Drug Administration for food packing and for food contact use.
- Duro-Bond PVDF can be bonded to various substrates and can be installed by experienced technicians in the shop or in the field. Among its other outstanding characteristics are high natural mechanical strength, high dielectric strength, excellent abrasion and stain resistance, and good thermal stability at both reduced and elevated temperatures.
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Uses
- Duro-Bond PVDF is used as a vessel lining material where severe corrosion conditions are present. Typical applications include towers, scrubbers, process vessels and high purity acid and ultra pure water equipment.
- In addition to providing high purity and corrosion resistance, Duro-Bond PVDF also resists the effects of abrasion and high temperatures. Because of its unique combination of properties, great strength, superior chemical, corrosion, and abrasion resistance, and a wide temperature range, Duro-Bond PVDF is frequently the most cost-effective material of choice for corrosion control and high purity in the chemical, semiconductor, transportation, pharmaceutical, metals, food, paper and electric power industries.
- 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 PVDF 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 PVDF rod and PVDF cap strip using a thermoplastic welding gun.
- 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 PVDF 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 | |
| Tensile Strength | 40 - 60 | N/mm2 | — |
| Elongation at Break | 20 - 80 | % | — |
| Solubility in water | Insoluble | — | — |
| Hardness Durometer | D 78 | — | — |
| Water Absorption | max. 0.03 | — | — |
| Oxygen Index | min. 44 | % | — |
| Flammability | V-0 | — | — |
| Thermal Expansion Coefficient 23 -150°C | 12.8 x 10-5 | mm/mm/°C | — |
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Service Temperature
PVDF is known for its resistance to halogens, petrochemicals, and most acids and bases in a temperature range from - 60°C to 145°C (-80 °F to 290 °F). When bonded to a substrate, the maximum recommended service temperature for Duro-Bond PVDF sheet lining is 110°C (230° F) on a continuous basis, 120°C (250°F) on an intermittent basis.