Master batching: A basis for uniform mixtures
Achieving the right proportion of a minor or micro ingredient in a batch can make or break the final product. But mixing these ingredients uniformly throughout the batch is no simple matter. This article first describes mixture components, then discusses choosing a mixer, developing a mixing specification, and how to use master batching to achieve uniform mixing. Related information covers ingredient characteristics to consider when creating a master batch.
In a batch, major ingredients [called the carrier] constitute 90 percent or more of the material. A minor ingredient typically makes up 5 percent or less, and a micro ingredient typically constitutes less than 1 percent.