The Rhopoint MFFT is used to determine the minimum film forming termpature and white point in paint and coatings such as water based coatings, polymer dispersions, synthetic latexes and emulsion.
The MFFT also test adhesive temperature optimisation in such areas as coalescence of water-borne adhersives and minimum temperature for epoxy resin cure.
Paints and Coatings
The minimum film-forming temperature (MFFT) of a paint or coating is the lowest temperature at which it will uniformly coalesce when laid on a substrate as a thin film. The standard test for determining this temperature involves using a MFFT-BAR, as specified by such standards as ASTM D 2354 and ISO 2115. The design of the Rhopoint instrument is based directly on these standards.
The MFFT of one-pack adhesives can be found in a similar way to paints and coatings. With two-pack adhesives, a strip of aluminium foil can be laid on the platen, to ease cleaning, before applying the adhesive. Two-pack adhesives do not show an MFFT, but the minimum cure temperature can be found by scraping the sample with a spatula