Metrastat SA

Technopole 4 , 3960 Sierre
Switzerland

Telephone +41 78 7413874
Fax +41 27 4568485
info@metrastat.com

Trade fair hall

  • Hall 12 / A51-03
 Interactive Plan

Hall map

K 2016 hall map (Hall 12): stand A51-03

Fairground map

K 2016 fairground map: Hall 12

Our range of products

Product categories

  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.09  Measuring and test equipment
  • 03.09.003  Measuring and test equipment for thermal properties

Our products

Product category: Measuring and test equipment for thermal properties

The system

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.

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Product category: Measuring and test equipment for thermal properties

The METRASTAT “PLC TOUCH” Heat Stability Testing oven

The new automatic testing oven, the Metrastat PLC TOUCH, makes it possible, like its predecessors, to expose polymer samples to heat, at constant temperature and for different lengths of time, to see the degradation and stabilizer consumption in plastic samples (PVC, PE, PP, PVDF, PTFE, plastisols, etc.).

The new oven has a better performance and reliability because equipped with Siemens automation, a programmable logic controller which regulates perfectly the heat distribution in the oven’s heating chamber.

The unit ensures the reproducible baking of 10 (or 5 larger) test samples simultaneously, with high precision and linearity.

Its resistance to corrosion is legendary. A linear exhaust system pulls corrosive and toxic fumes out of the oven for the duration of a test. The test time can be preset to any desired duration, from minutes up to one month. All the parameters, be it temperature, preheating time and test duration are set on the Siemens touch pannel replacing all the previous electronic commands of the METRASTAT 780 oven.

A new Metrastat integrated exhaust hood is also available now. It is equipped with an active carbon adsortion system and can be fixed directly on top of the oven.

Technical specifications of the Metrastat PLC TOUCH

- Dynamic oven for the progressive exposure of polymers to heat (DIN 5381F, AFNOR T51-224)
- Equiped with Siemens automation, a programmable logic controller which regulates perfectly the heat distribution inside the oven Resistant to corrosion -       from hydrogen halides and tropical climate conditions (316L stainless steel)
- Traveling carrying frame with ten/five separate non corrodable, non sticking sample holding trays
- Adjustable temperature limit selector with automatic shut-off
- Unlimited preheating time and unlimited choice of test durations
- Indication of the selected preheating time and test duration
- Automatic switch-over from the static preheating process to the dynamic baking process
- Process status on the touch screen indicating test duration and travel progression of the samples
- Early manual start of the baking process possible
- Emergency button for immediate interruption of the test followed by quick exit of the carrying plate
- Automatic quick exit of the carrying plate when restarting the apparatus after a power failure
- Modular construction for easy maintenance of the apparatus

Optional accessories:
- 1 set of 10 spare carrying trays with clamps to hold either sheet or profile,
- 1 set of 10 spare carrying trays for powders and pastes,
- 1 set of 5 larger individual trays (260 x 35 x 6mm) for samples to be evaluated on the Fluoscan Reflectometer
- Integrated exhaust hood

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Product category: Measuring and test equipment for thermal properties

FLUOSCAN REFLECTOMETER SYSTEM

If you now wish to evaluate quantitatively the progressive color changes observed on samples emerging from a METRASTAT PLC TOUCH testing oven, our automatic scanning FLUOSCAN REFLECTOMETER will do it for you, fast, with precision and reproducibility.

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.

OPERATING PRINCIPLE

The double track scanning reflectometer for the evaluation of either the progressive color change or the fluorescence intensity of polymer samples previously exposed to heat in either a METRASTAT testing oven or any other similar equipment operating according to the principle of an incremental motion of test samples emerging from a heating enclosure kept at a constant temperature.

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.

The following curves, representative of color trends and other useful variables can hence be easily generated by the instrument.

– L* Lightness Curve
– a* (>0) Reddening Curve
– a* (<0) Greening Curve
– b* (>0) Yellowing Curve
– b* (<0) Bluing Curve
– YI Yellowness Index (ASTM D1925)

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Product category: Measuring and test equipment for thermal properties

Lab services

You would like to test the properties of a new product? A new formula is in the pipe but you do not need to buy a complete testing system for your laboratory? We test your products for you at our facilities in Sierre, SWITZERLAND, with a complete end report on the caractiristics of your products.

Interested? Ask for an offer through our contact page or follow the link below.

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