PERFORMANCE CHARACTERISTICS
- Superior chemical resistance
|
- UV and or radiation stability
|
- Excellent abrasion resistance
|
- Outstanding aging resistance
|
- Good heat resistance-environments up to 300°F
|
|
- Excellent Thermo Stability
|
|
|
|
|
CHEMICAL RESISTANCE
KF Polymer® has outstanding resistance to most inorganic
acids, alkalies, aliphatic and aromatic hydrocarbons, organic acids, alcohols, halogenated solvents, halogens and strong oxidizing agents.
Spool piece tests over 11,000 hours in 36% Hydrochloric acid, 93.6% Sulfuric acid and 40% Nitric acid at a temperature of 70°C (160ºF), at 150 psi pressure, showed no permeation or degradation of KF Polymer®. A similar test of 9000 hours in 36% Hydrochloric acid at a Temperature of 104ºC (220ºF), also showed no permeation or degradation.
KF Polymer® provides an excellent pinhole free permeation barrier to small molecules. Access to a KF Polymer® coated substrate by corrosives is effectively prevented. Water permeability of polyvinylidene fluoride to ASTM E-96 (gram) (mil)/100in2) (24h) (atm) at 25ºC (77ºF) is 1.56.
Hot fuming Sulfuric acid, some strong basic amines, hot concentrated alkies and alkaline metals can cause degradation. Slight swelling may occur with use in highly polar
solvents, such as acetone and ethyl acetate.
For more detailed information see Technical Data Sheet KF Polymer® - Chemical Resistance.
PHYSICAL PROPERTIES
KF Polymer® has excellent bonding between molecules and shows good mechanical properties in elongation, flexure, tension, compression and impact. The tensile yield strength is 575kg/cm2 (8000 psi) the highest of any of the fluorinated polymers. KF Polymer® has a high distortion temperature. Creep resistance is good. At a stress of 140kg/cm2 and a temperature of 25ºC, the creep rate is 1.5%.
FOOD PROCESSING USE
FDA: KF Polymer® resin conforms to FDA requirements and may be safely used as articles or components of articles intended for use in contact with food. Environments involving food acids and caustic cleaning at elevated temperatures can be handled. Requirements for food use may be found in the code of Federal Regulations, 21, Food and Drugs, Part 177.2510. USDA: KF Polymer® is chemically acceptable for application to surfaces where there is a possibility of incidental contact with meat or poultry food products prepared under Federal inspection. It is also acceptable for use on those areas of equipment permitted to be coated in the standard for equipment design and construction published in Accepted Meat and Poultry Equipment, MPI-2.
Fire Resistance
In actual ASTM D 635 Tests, KF Polymer® does not burn freely and self-extinguishes on removal of the flame. It has an oxygen index of 43 (minimum quantity of oxygen, expressed in %, an atmosphere in which burning could occur), meaning KF will not burn in a normal atmosphere.
UV AND GAMMA RADIATION STABILITY
Weathering and aging resistance are excellent. KF Polymer shows good glass holding capacity against ultraviolet radiation. Weatherometer tests indicate no decrease in tensile strength after exposure to ultraviolet radiation for 3,000 hours. After exposure to 100 megarads of electromagnetic radiation, KF Polymer® showed no decrease in tensile strength. KF Polymer’s® stability under ultraviolet and gamma radiation is unsurpassed by other plastics.
CORROSION? ABRASION?
KF Polymer® coating powder provides a corrosion resistant protective coating from .015 to .050 inches in thickness. Impervious to a wide variety of corrosive environments up to 300°F, and in addition has excellent mechanical properties, such as impact resistance. KF Polymer® is a fluoro carbon thermoplastic resin (PVF2polyvinylidene fluoride). It is available in powder and pellet form for application and processing by conventional techniques and equipment.
FOOD PROCESSING USE
FDA: KF Polymer® resin conforms to FDA requirements and may be safely used as articles or components of articles intended for use in contact with food. Environments involving food acids and caustic cleaning at elevated temperatures can be handled. Requirements for food use may be found in the code of Federal Regulations, 21, Food and Drugs, Part 177.2510.
USDA: KF Polymer® is chemically acceptable for application to surfaces where there is a possibility of incidental contact with meat or poultry food products prepared under Federal inspection. It is also acceptable for use on those areas of equipment permitted to be coated in the standard for equipment design and construction published in Accepted Meat and Poultry Equipment, MPI-2.
