Carbon Black Dispersion Testing
ISO 18553 | Pigment Dispersion Assessment in Polyolefin Pipes, Fittings, & Compounds
ISO 18553 | Pigment Dispersion Assessment in Polyolefin Pipes, Fittings, & Compounds
Pigments and carbon black are used in the polyethylene pipe industry for material identification as well as for surface protection to maintain physical and mechanical properties.
Samples of pipe material are cut and pressed between microscope slides and then melted between 150°C and 210°C. The pressed sample is examined under high magnification and the dispersed particles are graded by their size distribution. The method calls out how to grade the materials based on particle size distributions.
A total of 6 samples must be able to be removed from different parts of the product. Each of these samples must weigh 0.60 grams.
This is a standard test method for polyolefin pipes.