The testing oven METRASTAT PLC TOUCH is ideal for you:
to control the quality of your raw materials (powders, pellets)
and finished products (pipe, profile, sheets and coatings)
by enabling you to compare the progressive degradation of several test samples simultaneously (ten or five)
to optimize your batch formulations
by making it possible to evaluate quantitatively the performance of stabilizers, lubricants and other additives that may affect the quality of a product when exposed to heat.
to improve your manufacturing processes by allowing a visualisation of major parameters such as the fusion profile of resins, the gelling time of plastisols or the efficiency of blowing agents in foamed compounds
The FLUOSCAN principle for taking the guessing out of heat stability testing:
One-foot long test samples, of different composition, are slowly pulled out of an oven set at constant temperature.
The progressive discoloration and fluorescence resulting from the degradation of each sample over time are then evaluated by comparing the samples, visually or instrumentally with the Fluoscan Reflectometer. This instrument will scan the samples under white light and UV light and will give you the Yellowness Index, L*a*b* curves, etc. in a report form or as single exportable images or data.
Two detector heads, both connected to a spectrophotometer, operate separately in two distinct modes of illumination of the samples, one in white light, the other in UV light.
In either one of these two modes, the reflectometer generates, on its touch screen, a calibrated scaled image of the sample showing any change in color or fluorescence occurring in the sample during the scanning operation after exposure to heat.
Precise and reproducible information on the color composition of the sample is then given in all three coördinates of the CIE L*a*b* color space in the form of images, tables or curves, on screen or in an exportable format.
- Lightness Curve
- Reddening Curve
- Greening Curve
- Yellowing Curve
- Blueing Curve
YI Yellowness Index (ASTM E313)
In its fluorescence mode, the reflectometer reveals an increase in the concentration of short chain unsaturations in the polymer and so, an increase of stabilizer consumption during exposure to heat. This phenomenon, otherwise invisible to observation under day light with the naked eye, applies to halogenated polymers such as PVC, PVDF, etc. but also to other polymers undergoing thermal degradation by auto-oxydation such as PE, PP, PA, etc. All data collected by the reflectometer is processed and stored on the dedicated computer of the instrument and can be exported in Excel format, or printed directly.