BGD 452 ASTM D 2354 Minimum Film-Forming Temperature Tester Mfft Testing Machine

BGD 452 ASTM D 2354 Minimum Film-Forming Temperature Tester Mfft Testing Machine

1.Description    

      Emulsions for coatings and polymer dispersions for coatings and plastics, as an important part of coatings, adhesives and other polymer materials, their film-forming properties directly affect the drying properties of the final product, so it is very necessary to understand its minimum film-forming temperature.
      Emulsion or dispersion material uniformly dispersed in a liquid medium (usually water) in the formation of the dispersion system, in the drying process, due to liquid evaporation can be prompted by inter-particle interactions, so that tightly combined. If the temperature is not high enough to make the polymer particles polymerization, the polymer particles are no longer agglomerated together, thus forming intermittent opaque white lumps; if the temperature conditions are sufficient to make the polymer particles polymerization, then the particles agglomerated together, then the formation of a continuous and uniform transparent film.
       White Point Temperature: The temperature at which an opaque film is transformed to form a transparent film.
Minimum Film Formation Temperature: The lowest temperature at which a continuous, uniform, crack-free, transparent film can be formed (the white point temperature is generally a few degrees lower than the minimum film formation temperature).
       BGD 452 Minimum Film-Forming Temperature Tester is a newest instrument developed by BGD, whose main structure is a metal gradient plate, and the two ends of the gradient plate are set up with refrigeration source and heating source respectively. Through the principle of metal heat conduction, different temperature gradients are generated on the metal plate. In the temperature gradient plate coated with a continuous uniform thickness of the emulsion or polymer dispersion of the wet film, dry air flow drying samples, samples at the same time by the gradient plate temperature evaporation of water and film. Due to the different temperatures on the gradient plate and the different positions of the sample film formation, to find the junction of the formation of a continuous transparent film and white opaque (unpolymerized), this point corresponds to the temperature on the gradient plate can be derived from the screen display, the temperature is the MFT temperature of the sample.
       The instrument meets the standards of GB/T 9267, ISO 2115 and ASTM D2354; it can determine the minimum film forming temperature of polymer emulsion simply, intuitively and accurately.

Characteristics:
* High-tech products, the first of its kind in China, incorporating a number of patents with independent property rights;
* Small size, high precision, intelligent operation, simple and convenient.
* Color touch screen + menu operating system, multiple parameters real-time display, simple and convenient operation
* High-precision digital temperature sensor to ensure that the temperature error is less than ± 1 ºC.
* Standard with independent cooling water circulation system
* Optional dry air generator, can produce low dew point dry air, can make the sample completely dry and test results are not affected by environmental humidity.
* Movable scale (with lighting) to facilitate the experimenter to read out the temperature at any point on the gradient plate: the operator can move the scale arbitrarily, the instrument automatically recognizes the current position point of the scale and displays the real-time temperature of the position on the LCD screen.
* Automatic monitoring of the cooling water temperature and flow, if there are abnormalities in the alarm and automatic shutdown
* Workbench (gradient plate) using copper surface special process, fast heat conduction, strong stability
* The system automatically reminds the test process
* Seven test conditions can be selected to facilitate the testing of different film temperature samples
* Gradient plate uniformly distributed 16 high-precision temperature sensors.
* Standard with a special preparator (gap depth of 100μm/170μm), the sample can be coated into a thickness of about 100 μm, the width of 22mm continuous and uniform wet film.

2.Technical Parameter