Masterbatch (English name Masterbatches) full name of plastic masterbatch, alias masterbatch is a plastic processing aid developed in the 1980s, it is composed of excess chemical additives, carrier resins and dispersants, etc. .
Masterbatch is an aggregate obtained by uniformly loading a super-constant amount of pigment (dye) in the resin. Masterbatch refers to that in the process of plastic processing and molding, for the convenience of operation, various additives, fillers and a small amount of carrier resin are mixed and kneaded first. The granules obtained by processing such as cutting and dicing are called master batches.
The masterbatch is composed of carrier resin, various fillers and various auxiliaries. The limit of additives or filler content in the masterbatch is several times to ten times higher than that required in actual plastic products. During the molding process, the ratio of the masterbatch to the matrix resin must be adjusted according to the content of the relevant components in the masterbatch and the amount to be added to the actual product. Masterbatch can usually be divided into ordinary filler masterbatch (referred to as filler masterbatch) and functional masterbatch, such as color masterbatch, anti-fog masterbatch, etc.
Masterbatch processing method:
Traditional plastic masterbatch processing methods can be divided into two-roll open-mixing method, internal mixing method and extrusion method according to the process route. and other mixing equipment.
The masterbatch prepared by this method has disadvantages such as uneven distribution of the auxiliary agent in the carrier resin, poor cross-sectional adhesion between the auxiliary agent and the carrier resin, and complicated production procedures. In view of the above shortcomings, many new processing technologies have been developed.
The new masterbatch processing technologies include (1) selection and processing technology of carrier resin; (2) polymer wrapping technology; (3) liquid phase blending method; (4) Melt phase blending method; (5) Molecular self-assembly, etc.
