Verifying Inorganic Filler Concentrations in Foreign Masterbatches Crossing Trade Borders
Verify masterbatch ash content via ISO 3451 calcination at 600°C to protect duty lines, catch mineral substitution, and prevent process failures.
ISO 13320
Meaning
Optical particle size analysis measures light scattering angles to determine volume-based size distributions of powders and dispersed pigments. Standard testing under iso 13320 provides characterization of calcium carbonate, talc and titanium dioxide powders prior to masterbatch compounding. Guidelines govern dry powder dispersion and liquid suspension methods, excluding coarse granules larger than three millimeters where sieve testing applies.
Optical Dispersion
Mie scattering theory models light diffraction patterns generated as laser beams pass through dispersed mineral particles. Applying iso 13320 requires controlling sample concentration to avoid multiple scattering effects that distort calculated size distributions. Refractive index matching between particles and dispersion media remains essential for accurate data processing.
Size Distribution
Particle size metrics like median diameter and span define raw mineral filler performance in polymer matrices. Compliance with iso 13320 ensures reproducible measurement of fine particle fractions that drive compound viscosity and mechanical strength. Standardized reporting allows compounders to compare filler shipments across different mineral suppliers.
Pigment Dispersion
Fine particle detection identifies agglomerates that cause surface defects in extruded plastic films. Utilizing iso 13320 enables quality control laboratories to set particle size specifications that prevent filter screen clogging during compounding. Consistent particle sizing yields predictable color strength and mechanical reinforcement.