Plastic lubricant definition and classification

Plastic lubricant defined: the polymer after the melt generally have a higher viscosity, in the process, the molten polymer through the slit in the gate channel, etc., bound to a polymer melt processing machine with surface friction, the friction of the processing, some of the polymer is very unfavorable, so that the friction is reduced melt flow, and the friction causes a serious film surface becomes rough, or the lack of luster appears rhyolite. To do this, need to be added in order to improve Plastic lubricants , reduce friction and adhesion properties for the purpose of lowering the interfacial agents. This is the lubricant. In addition to improving the mobility of the lubricant, but also can play a melt accelerator, anti-adhesion and anti-static agents, slip agents and the like effect. Plastic lubricant Category: Lubricants can be divided into two kinds of external lubricant PVC lubricant  and internal and external lubricant role is mainly to improve the friction polymer melt processing equipment with hot metal surfaces. It is less compatible with the polymer is easy to migrate out from the melt, so the lubrication can be formed in the plastic sheet with the metal melt interface. Internal Plastic lubricants have good compatibility with the polymer properties, which serve to reduce the effect of cohesion between the polymer molecules within the polymer, thereby improving the internal friction of the plastic melt of the heat and melt flowability. Commonly used lubricants are stearic acid and its salts outside; internal lubricant is a low molecular weight polymer. Some lubricants have other functions. Each lubricant has actually can achieve a required role, internal and external lubrication always together, but in a way more prominent. A lubricant with different polymers under different processing conditions or exhibit different lubrication, such as high temperature, high pressure, the lubricant will be squeezed out of the inside and outside of the lubricant becomes.