Master batches by carrier, consisting of various fillers and additives. Masterbatch, additives in limited or fillers than actual plastic products need to be several times higher to more than 10 times. In the course of processing, must be related according to the master batch of components and to join in actual products, adjust the ratio of masterbatch and resin. Masterbatches can be divided into ordinary filling masterbatch (filler masterbatch for short) and functional masterbatches, masterbatch, anti-fog masterbatch.