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
The instrument benefits from an easy to use touch screen interface, digital MFFT temperature calculation and output to handy results labels. These additions to the trusted Rhopoint MFFT make the instrument easier to operate with improved certainty of results.
The temperature bar consists of a copper platen with an electronically imposed temperature gradient. Built in temperature sensors monitor the temperature across the platen, a graph of the gradient is displayed on the touch screen.
Purge gas is integrally dried, and flows over the platen via a sintered distribution block. The hinged perspex cover provides thermal and atmospheric insulation whilst allowing constant visual inspection of a test. A cursor is moved to indicate the identified MFFT point; the instrument calculates and displays the temperature in the required units.
The instrument can be supplied with an optional results label printer. Recorded values include the time and date of the test and identified minimum film forming temperature. The printed label can be attached to retained sample bottles or job sheets.
MFFT Minimum Film Forming Temperature Instrument parameters:
Minimum 1 gradient plate working temperature range, the cold end - 7 ℃ 70 ℃ of hot end;
2 gradient plate detection points: 13;
3. Gradient interval: 20mm;
4. Coating bath: 6, length 240mm, width 22mm and depth 0.25mm;
The inspection table shows: 16 points, 1 ~ 13 points are the working gradient temperature, 14 points are the ambient temperature of the instrument, 15 and 16 points are the inlet and outlet temperature of cooling water.
Power supply: 220v 50Hz ac wide voltage (three-phase power supply, good grounding);
Cooling water source: ordinary municipal water supply;
8. Instrument shape: size 520mm x 520mm x 370mm (most);
Instrument weight :31Kg;