A process to reduce permeability and improve the chemical resistance of various plastics and elastomers. When fluorine gas is brought into contact with a polymer, its molecular structure is altered on all exposed surfaces.-Cap (G-450) A 70 millimeter closure with a deep screw threaded skirt.
A surface treatment for polyethylene that is used to improve the barrier properties against non-polar materials or solvent.
The process of bonding fluorine gas to plastic. Inhibits the attack of certain kinds of products, and prevents plastic container paneling and distortion, reduces chemical permeation, odor emission, or flavor loss.
Is an extra process in which a thermoplastic article (container or closure) is exposed to fluorine gas. The fluorine substitutes with some hydrogen atoms in the polymer chain creating a barrier and surface enhancement. Benefits include improved barrier properties and reduced solvent absorption and permeation.
Technique used in the production of gas tanks, for example; a fluorinated gas chemically modifies the surface of the plastic to increase the tank′s impermeability to petrol fumes
Fluorination is a treatment that allows monolayer plastic fuel systems to comply with Euro 2000 and LEVI emission regulations, by lowering tank permeation to hydrocarbons. The principle of fluorination consists in treating plastic parts using a mix of fluorine and nitrogen. Fluorine generates a chemical substitution reaction on plastic surface : hydrogen atoms (H) are replaced by fluorine atoms (F).
Processing, like e.g. the agglutination, flocking, varnishing, coating of plastics, often causes problems. Plastics have mostly non-polar surfaces. That's why adhesives and varnishes are often incapable to generate sufficient adhesion to these surfaces. Through fluorination, polar groups are built up on the surface that improve adhesion without affecting the plastic material.
