PVC known as polyvinyl chloride, its viscosity flow temperature and degradation temperature is very close, so it is easy in the process of various forms of degradation, and thus lose the use of performance. Therefore, it is necessary to add heat stabilizer and lubricant in the formulation of PVC mixture, the former improves its heat stability, the latter reduces the friction between PVC molecular chains, and the defilming force between PVC melt and metal, improve the convenience of processing PVC into various products. pe wax and oxidized polyethylene wax are common lubricants in PVC.

In the processing of PVC, there is no pure melt, only secondary particles (about 100μm, consisting of primary particles and nodules) are split into small balls (about 1μm) and nodules (about 100nm) under the action of thermal and mechanical shearing, this process is usually called gelation or plastication. In order to achieve better mechanical properties, surface properties and processability, the degree of gelation between 70% and 85% is appropriate. The gelation process can be delayed or accelerated by proper selection of polyethylene wax. After melting, the homogeneous polyethylene wax exists between first-order particles or nodules, which reduces the friction force between first-order particles or nodules, thus reducing the frictional heat of the melt, delaying the plasticization of PVC, and at the same time, the thermal stability of PVC was also improved. Oxidized polyethylene wax has a certain compatibility with PVC, can adhere to the surface of nodules, increase the melt viscosity, and has a fine-tuning effect on gelation behavior, reducing the friction between the melt and the processing equipment is a good release agent in the processing of PVC, especially in transparent PVC (organotin stabilizer) film, adding the right amount of oxidized polyethylene wax not only plays a very good release, but also does not reduce the transparency.

At present, in addition to synthetic pe wax and oxidized polyethylene wax in PVC, paraffin wax, feto wax and by-product wax are also widely used and also need to be flexibly matched according to the terminal application, For example, low melting point paraffin wax can play the role of early lubrication, in the melting point of polyethylene wax, feto wax can play the role of mid-term lubrication, high melting point of oxidized polyethylene wax can play the role of late lubrication. Some heat-resistant limited lubricants such as paraffin wax, fatty acid esters, etc. , easy to extrusion products die, rolling film cooling roller deposition. These substances on the surface properties of the final products, as well as on-site workers working environment, production will have a negative impact. Moreover, a single lubricant in PVC compatibility is very high, if the use of composite lubricant package, the various components of each other incompatible, mutual reaction, it is also easy to lead to compression. Therefore, according to the application of products such as whether the need for printing, spraying, selection of stable quality, good temperature resistance lubricant, for the smooth production and improve product quality is very important.
Qingdao Sainuo Chemical Co.,Ltd. We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA, EBS,Zinc/Calcium Stearate…. Our products have passed the REACH, ROHS, PAHS, FDA testing. 
Sainuo rest assured wax, welcome your inquiry!
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