Glossary of Terms

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Carrier:
The liquid portion of a coating (solvent or water) in which solids are dissolved or suspended.

Coefficient of friction:
A number expressing the amount of frictional effect: static or dynamic.

Cold flow:
Tendency of plastic materials to migrate slowly under heavy loads and/or over time.

Conductor:
Material that can support flow of electric current. Fluoropolymer coatings are normally insulators, but can be modified with certain fillers and pigments to make them conductive.

Contact angle:
A means of quantifying the nonstick properties of a coating by measuring the ability of a liquid to wet its surface.

Corona charge:
An electrostatic charge induced on powder particles by passing them through an electrostatic field generated by a high-voltage device.

Corona gun:
A powder gun that uses corona charging.

Corrosion:
Process of metal decomposition (oxidation) in which metal ions are united with oxygen to form metal oxides. Fluoropolymer coatings provide excellent barriers against corrosion.

Crosslinking:
Quality of thermosetting plastic resins in which polymer chains combine during the curing process. In general, the greater the crosslinking, the tougher and more chemically resistant the coating.

Cure end point:
The point either during or following the cure schedule at which the coating film is determined to have developed specified properties.

Cure schedule:
The time/temperature relationship required to cure a coating.

Curing:
Process of bonding or fusing a coating to a substrate with heat and developing specified properties in the coating.

Cut-through resistance:
A coating film's resistance to penetration resulting from the combined application of sharp edges, heat and pressure.