Changshu smoothly da plastic products factory talk about how to add lubricant in PE plastic pipe material production

PE plastic pipe material in the process of production line for processing molding, generally have good liquidity, do not need to consider to choose lubricant. But for high molecular weight and viscosity of the melt is large, illiquid PE plastic, such as high molecular weight PE and LLDPE, and join the packing of PE plastics processing, need to consider the lubricant and must choose a suitable lubricant to join. Changshu well below da plastic products factory talk about how to add lubricant in PE plastic pipe material production!



PE plastic in extrusion process, from raw material mouth, after China's entry into wto after the charging period, compression and metering section, finally from the nose mouth die extrusion, molding products. In the process of the three sections, the state of the material is different, different flow state, so that in different stages of selected lubricant should consider different stages of lubrication and choose different lubricant. In charging period of solid, the material is pushed forward after compaction, material in the process of conveying, gradually by plus heat and shearing action temperature is high, then the main solid particles and machine barrel and screw metal surface friction, friction between particles decreases at the same time. Should choose external lubrication of lubricant, such as fatty acid, wax, etc.



the material into the segment will be larger compression, compression and achieve above or viscous flow temperature, melting point, to soften or melt began appearing in material will show solid-liquid coexistence state. At this time of lubrication is to consider a solid and to consider liquid, this section of lubricant to include internal and external lubricant lubricant. Internal lubricant compatibility and material to a certain extent, can reduce the viscosity of the molten PE, reduce the internal friction of polymer chain, improve liquidity. In the lubricant should choose when the choice high fatty alcohols, fatty acid ester, and soap.



in the metering section, all become to liquid or molten material, the lubricant should be the main selection internal lubricant, so that the internal friction between the molecules, increase liquidity. And considering the factors of this period of higher temperature, select soap, fluoride hydrocarbon such as lubricant.



from PE plastic in the three different material of the friction and lubrication, so in the practical work, outside lubrication of the lubricant should be considered, and to select suitable lubricant, reducing the amount of lubrication, avoid excessive lubrication, lead to screw slippage.



LLPE with fluoropolymer is in recent years the emergence of a new functional processing modifier, it can be in the form on the surface of processing equipment LLDPE incompatible fluorine polymer coating, increase the wall slip velocity. From the above view, the lubricant is a kind of can improve polymer processing properties such as plastic, rubber additives, in addition to reduce friction and improve liquidity in the process of resin or rubber processing, also has the demoulding, lubricant can also be extended to can increase the surface is bright and clean, prevent the product performance such as adhesion between interface.