Resistance against environmental influences of the Lexan films
Increased temperatures can pander or accelerate this kind of defects.
Some chemicals, like acetone, toluol and halogenised hydrocarbons act soluble to GE films. Because of that dichloromethane is used as a solvent adhesive for GE films.
Whenever influences of potential aggressive or incompatible materials are possible, only covered films should be used.
Chart 18 states relevant information about the general chemical compatibility of GE films. Generally the concrete resistance against specific substances during processing and/or using should be pre-tested under practical conditions in every individual case.
In case of doubt please do not hesitate in contacting our application engineering.
Behaviour after immersion in water
Gas- and vapour permeability
Chart 20 states typical values for Lexan® and Ultem® films with a wall thickness of 0.025mm at 23°C.
Chart 20: Gas- and vapour permeability in controlled atmosphere
Diagram 8: accelerated UV lightning (ASTM G53 – UV313 BB)