The Rheometer can be used for test fluidity and solid rate of thermosetting plastic, and also can be draw up diagram of curve as : stress-strain; plastify. measuring the temperature of softening point: melting point; and fluid point .Test polymer melt viscosity and activation, and research technology condition of melt polymer filament spin.
Technical parameter and accuracy
v Temperature range : room-400C± 1C
v Rate of heating:1,2,3,4,5,6 C adjustable continuously
v Temperature measuring accuracy:display on monitor <±1C resolution:0.1C
v Extrusion dies diameter:φ11.28mm;
v Area of extrusion dies:1cm2
v Power supply: 220V, 50Hz, <1000W
v Pressure:1-50Mpa±1%
v Capillary specification:(DXL):φ1×5, φ1×10, φ1×20, φ1×40mm
v Measuring accuracy of load:± 1%;
v Load resolution:100,000 yard;
v Speed setting:500mm/min-0.001mm/min;
v Displacement Measuring accuracy :± 0.5%
v Shape size:630x400x1900mm;
v Weight :100kg;
Standard configuration
l Main body 1 set
l High grade temperature control gauge 1 set
l FUJI servo controller 1 set
l FUJI servo motor 1 set
l Digital ruler 1 piece
l High grade sensor 1 set
l Host computer Tsinghua tongfang 1 set
l Color typewriter 1 set
l Test software 1 copy
l XP software 1 copy
How does the capillary rheometer differ from a melt indexer?
Traditionally, the melt flow indexer (MFI) has been the instrument of choice for quantifying melt flow properties in the plastics industry. MFI machines are typically inexpensive and easy to operate. They require a minimum of expertise to interpret the results, which more often than not is a single value. The basic test uses a single dead weight to record the amount of material extruded over a fixed period of time. As a result, the MFI quickly became the de facto standard in the plastics industry.
Capillary rheometers on the other hand can be used to determine a range of material functions. They can quickly and easily measure the flow properties of a material over the full range of forces, pressures, geometry, and temperatures that are encountered in real processes.
Modern capillary systems incorporate computer-controlled drive systems and software that allow measurements over a wide dynamic range and also provide all the elements necessary to simulate current processing machines. The standard capillary corrections can be automated in the software.
An MFI can be used for relative ranking of materials but is not capable of providing fundamental material properties and has a very limited test range.
As the applications for injection moulding , extrusion, and other processes become more demanding, the requirement for more extensive rheologcial testing has increased tremendously.