Inkulu  Plastic  Laboratory

1. MELT FLOW INDEXER (MFI) TEST

Determines the melt strength of raw material to be used to manufacture pipe. MFI indirectly measures the viscosity of the material. Ref  ISO 1133.

  • The test is done upon receiving of raw material sent with the COA, first to verify if the supplier’s test corresponds with the test result on the COA sent. SANS 4427-1.
  • Once again when pipe is manufactured, it goes for MFI tests  to  measure the value on the pipe relative to the value on the measured compound.

Once the pipe is manufactured, it should have the mechanical and physical characteristics conforming to the requirements of SANS 4427-2.

2. LONGITUDINAL REVERSION

Determines the expansion and contraction due to temperature changes.  This will depend on the start and final temperature.

  • A pipe of specified length is subjected to specified constant temperature within an oven or a liquid bath for a specific time. Ref SANS 2505.
  • This reversion is calculated as a percentage of the change in length to the initial length.

3. OXIDATION INDUCTION TIME (OIT)

  • OIT is a sensitive measure of the level of anti-oxidative additives within the polymer.
  • Determines of oxidation induction time and oxidation induction temperature of polymeric materials by means of Differential Scanning Calorimetry (DSC) Ref ISO 11357.

4. TENSILE PROPERTIES

  • Determine the modulus of elasticity, elastic limit, elongation, proportional limit, reduction in area, tensile strength, yield point and yield strength.

5. HYDROSTATIC PRESSURE TESTS

The resistance to internal pressure testing is the most important test of thermoplastic pipes to constant internal water pressure at a constant temperature.  The test duration is subject to the tension generated by the internal pressure and the temperature.

We also have Hydrostatic Computerised systems.

6. CARBON BLACK DISPERSION

  • Determine the presence of carbon black dispersion content which is added to the product during the process of production and it is widely used in the laboratories of plastic industries.