How to Select the Right Dosage for Antibacterial Masterbatch

Why Dosage Matters

Antibacterial masterbatch delivers its function through the active agent dispersed in the polymer matrix. Too low a dosage may not reach the target reduction rate, while an excessive dosage can affect colour, odour and mechanical performance. Selecting the right dosage is therefore a balance between efficacy and cost.

Key Factors to Consider

The required dosage depends on the base resin, the wall thickness of the final part, the expected service life and the testing standard applied. Thin-walled parts generally need a higher loading to keep the surface concentration above the inhibition threshold, whereas thick sections may reach the same effect with a lower addition.

Practical Advice

We recommend starting with a small pilot trial, preparing several loading levels and evaluating them with a consistent test method. Recording processing parameters alongside the results helps to distinguish material effects from process effects, and provides a reliable basis for scaling up to mass production.