Selecting Tariff Lines for Importing Polymer Masterbatches
Masterbatch tariff classification hinges on active chemical loading, where inorganic pigments above specific mass thresholds shift import codes from Chapter 39.
ISO 10601
Meaning
Technical standard for specifying the quality of pigment preparations used in plastics provides a framework for evaluating dispersion and color strength. Compliance with iso 10601 allows resin suppliers and moulders to agree on measurable performance criteria for masterbatches. This document defines the testing methods used to verify that pigments will not clump during processing.
Quality Requirement
Procurement specifications often cite this standard to ensure that incoming batches meet a minimum threshold for dispersion. If a delivery fails to meet iso 10601 benchmarks, the risk of surface streaks and mechanical failure increases.
Dispersion Test
Measuring the pressure rise across a fine filter screen provides a numerical value for pigment agglomeration. A high pressure filter test indicates that the particles are not sufficiently ground or wetted by the carrier resin. This process is documented in iso 10601 to provide a repeatable metric for different laboratories.
Consistent results allow manufacturers to predict how a colorant will behave in a high-speed injection moulding machine. Low pressure rises are preferred for thin film extrusion where even small particles can cause pinholes or tears.
Standard Application
Implementation of these guidelines reduces the frequency of production stops for screen cleaning. Adhering to iso 10601 ensures that the visual properties of the finished product remain stable over long production runs.