Kalite Kontrol

Minimum Film Oluşum Test Cihazı

PRODUCT DESCRIPTION
The new designed temperature gradient plate for measuring the
Minimum Film Forming Temperature, MFFT 

BUSINESS
Laboratories, Development of Coatings- Polymers or Additives

STANDARDS
DIN ISO 2115 – DIN 53 366 – ASTM D 2354 – ASTM D 1465 – ISO 2115 
ISO/DIS 4622. Look up the appropriate standard for a correct execution
of the test.

FEATURES
The minimum film forming temperature (MFFT) is the minimum temperature
at which synthetic latex, emulsions, polymers or adhesives will coalesce
when laid on a substrate as a thin film.
The ideal way to determine MFFT is to simultaneously dry the emulsion
under test over a range of temperatures to see which is the lowest at
which film-forming has occurred. This is best achieved in practice by
using the MFFT gradient plate.

Three steps of the film-forming
   

 
1. Evaporation of water
2. Packing and deformation of particles
3. Diffusion of water out of film and
    coalescence of particles

A film of the latex under test is cast along the stage and left to dry. A visual inspection
of the dry film is then made to determine the position along the length of the film where it
changes from the coalesced to the non- coalesced state. A non- coalesced film shows
whitening and/or cracking. The lowest temperature at which the film is coalesced is reported as the MFFT.

SPECIFICATIONS
The high precision chromium measuring plate is equipped with equispaced
temperature sensors beneath the surface.
Microprocessor electronic temperature controller with digital temperature display and temperature 
preselection as well as excess temperature protection.

• Accuracy: 0,1°C
• Display of nominal value and actual value of the temperature of the hot and cold side
• Scroll function to request the temperature measuring stations (MFFT 10 – 10 stations / MFFT 20 – 20 stations)
• Manual selection of the single temperature measuring stations
• Integrated membrane drying unit with flowmeter
• Open table hood made of PMMA - Poly Methylmethacrylaat, max. working temperature 80°C

The flat hinged PMMA cover provides thermal and atmospheric insulation whilst allowing constant
visual inspection of an experiment.

                                                   Purge gas is dried with an integrated membrane dryer and flows over the platen.
A constant flow acc. to the standards can be set with a built in flow meter (only on MFFT 20)

  
MFFT 20 with digital flow meter                    MFFT 10 with analog flow meter

ORDERING INFORMATION

VF9600: MFFT 10 - Temperature range: -5…+80°C with a maximum gradient on the surface of 20°C

VF9700: MFFT 20 - Temperature range: -30…+250°C with a maximum gradient on the surface of 100°C.

Note: For both versions temperature depends on the external cryostat

COOLING DEVICES

The necessary cooling unit for operating does not belong to the scope of delivery. For each of the
MFFT 10 or MFFT 20 it must be ordered separately. The working temperature range and the maximum
temperature gradient depend on the effective cooling power of the connected cryostat.

VF9700: We recommend the standard cryostat type KWK 10. Working temperature range and
temperature gradient MFFT 20 with connected cryostat KWK 10:


VF9600: We recommend the standard cryostat type C10K20. Working temperature range and
temperature gradient MFFT 10 with connected cryostat C10K20:



Cryostats for other working temperature ranges and gradients upon request

ACCESSORIES
Different kinds of film casters are available upon request
 

TECHNICAL DATA

Overall dimensions (L x W x H):
800 x 350 x 320 mm (with closed cover)

Plate dimensions (L x W)
Measuring length: 500 mm
Measuring width: 180 mm

Power supply: 230 V, 50 Hz, 1,5 kW
Weight: 50 kg

SPECIAL CARE
•Though robust in design, this instrument is precision-machined. Never drop it or knock it over
•Always clean the instrument after use
•Clean the instrument using a soft dry cloth. Never clean the instrument by any mechanical means such as a w
  ire brush or abrasive paper. This may cause, just like the use of aggressive cleaning agents, permanent damage.
•Do not use compressed air to clean the instrument.
•We recommend annual calibration

SAFETY PRECAUTIONS
• Always make sure the instrument is connected to an earthed electric socket.
• Always make sure the instrument’s power is turned off while adjusting any electric component
 

      Yazıcı Dostu Sayfa
Ayrıntılı Bilgi Formu
Hizmetlerimiz ve diğer konular hakkında bilgi almak için bizimle irtibata geçebilirsiniz.


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