Lubricants are a class of additives used to improve the processability and apparent properties of polymers such as plastics and rubber. In addition to reducing friction in the general sense and improving fluidity and mold release during resin or rubber processing, the function of the lubricant can be extended to increase the surface finish of the product and prevent interfacial adhesion between the products. aspect. In terms of processing modification, the lubricant mainly reduces the mutual friction between the resin or the compound and the processing equipment and between the polymer molecules in the polymer processing process, thereby reducing the torque, saving energy, promoting flow and improving quality. the goal of.

Lubricants can be divided into internal and external lubricants. The distinction between internal and external lubricants is mainly based on their compatibility with the resin.

The internal lubricant has a large affinity with the resin, and its function is to reduce the force between the macromolecules;

The external lubricant has a low affinity with the resin, and its function is to reduce the friction between the tree and the processing machine.

The internal and external lubricants are only relatively speaking and there is no strict classification criteria. In resins with different polarities, the effects of internal and external lubricants may change.

The role of lubricants:

The role of the internal lubricant is as follows:

(1) Stabilizing the resin to prevent a sharp increase in torque during plasticization;

(2) reducing the melt viscosity of the resin, increasing the fluidity, reducing the screw torque, increasing the extrusion amount and the production amount;

(3) Improve processing capacity, reduce equipment load, and improve energy efficiency.

The role of external lubricants is as follows:

(1) preventing decomposition and coloration of the resin due to frictional heat between the resin and the surface of the molding metal;

(2) preventing sintering on the surface of the forming machine;

(3) improving the peeling performance of the roller surface;

(4) Improve the release property;

(5) Improve the smoothness of the finished surface.