PVC lubricants Overview

PVC lubricants can be divided into two kinds of external lubricant and lubricant inside and outside lubricant is mainly to improve the polymer melt processing equipment with hot metal surfaces rubbing. It is compatible with the polymer is poor, easy to migrate from the melt inside out, they are able to melt the plastic and metal

The formation of a thin layer of lubricating the interface. Lubricants and polymers have good compatibility, which serve to reduce the polymer inside the role of cohesion between the polymer molecules, thereby improving the internal friction of the plastic melt heat and melt fluidity. Commonly used plastic lubricant are stearic outer

Acid and its salts; internal lubricant is a low molecular weight polymer. Some other function of the lubricant. Each lubricant has actually can achieve a desired effect, always together internal and external lubrication, except in one respect more prominent. Run the same kind of

Slip agent in the different polymers or different processing conditions will exhibit different lubrication, such as high temperature, high pressure, the internal lubricant is squeezed out and become external lubricant.
In plastic film production, we will encounter some of the adhesion phenomena, such as in the production of plastic film, is not easy to separate the two films, which gives high-speed automatic packing difficult. To overcome it, the resin can be increased by adding a small amount of surface lubricity additives, to increase

Plus external lubrication, generally referred to as anti-blocking agents or slip agents. General molecular structure of the lubricant, there will be long chain non-polar group and a polar group in two parts, they are in different compatibility of the polymer is not the same, thus showing different for internal and external lubrication

Purposes. According to chemical composition, commonly used lubricant can be divided into the following categories: fatty acids and their esters, fatty acid amides, metal soaps, hydrocarbons, silicone compounds and the like.
Lubricant actual processing plastics with a variety of effects, such as the kneading, rolling processing, to prevent adhesion polymer cartridge, inhibition of friction and heat, reduce kneading torque and loads, thus preventing polymer material thermal degradation. In the extrusion molding, can be improved

Mobility, the barrel and the polymeric material to improve adhesion of the mold, to prevent and reduce the retentate. Another film can improve the appearance and gloss