As the PVC thermal stability is not good, it must be added to the corresponding stabilizer, repair PVC chain defects, and timely absorption of PVC dechlorination of HCL. At the same time due to PVC viscosity, large cutting processing characteristics, adding stabilizers at the same time must be added to the corresponding lubricants such as polyethylene wax.
Polyethylene wax, that is, PE wax, low molecular weight polyethylene, from the direct polymerization of ethylene, from different synthetic processes, catalytic system of synthetic products in the molecular weight, molecular weight distribution and molecular chain structure are different, the corresponding product performance There will be a clear difference. PE wax is usually white powder, the average molecular weight is generally 1500-5000, the melting point of 100-120 degrees. It has excellent external lubrication effect in PVC processing, can effectively improve the flow of PVC processing, production, dispersion, surface brightness and mold release. Because of its large molecular weight, high melting point, high temperature stability is very good, in high temperature and high shear conditions are showing a strong external lubrication effect.
Polyethylene wax PE wax products can effectively improve the thermal stability of PVC and the processing of the flow, increase the extrusion efficiency of PVC products to improve the surface gloss products, and effectively reduce the PVC product processing process precipitation phenomenon.
At present the domestic market PE wax are mostly divided into several:
1. Ethylene homopolymerized PE wax, the production of PE wax outside the lubrication performance, high gloss, narrow molecular weight distribution, quality is very stable, on behalf of products such as the United States Honeywell's A-C series.
2. Ethylene polymerization process by-product, commonly known as vice brand of wax, through the purification process, the purification of the PE wax, the product viscosity is low, high melting point, external lubrication performance, low prices, but the quality of raw materials and process changes A certain degree of volatility, due to the characteristics of refining process, the product will inevitably have more low melting point components.
3. PVC thermal stability of low molecular weight polyethylene cracking products, commonly known as cracked wax, the cracking process is simple and easy to operate, but the product molecular weight distribution with the production process has a certain fluctuation, the quality is relatively good, there will still be a small part of the low Melting point components.
Polyethylene wax, that is, PE wax, low molecular weight polyethylene, from the direct polymerization of ethylene, from different synthetic processes, catalytic system of synthetic products in the molecular weight, molecular weight distribution and molecular chain structure are different, the corresponding product performance There will be a clear difference. PE wax is usually white powder, the average molecular weight is generally 1500-5000, the melting point of 100-120 degrees. It has excellent external lubrication effect in PVC processing, can effectively improve the flow of PVC processing, production, dispersion, surface brightness and mold release. Because of its large molecular weight, high melting point, high temperature stability is very good, in high temperature and high shear conditions are showing a strong external lubrication effect.
Polyethylene wax PE wax products can effectively improve the thermal stability of PVC and the processing of the flow, increase the extrusion efficiency of PVC products to improve the surface gloss products, and effectively reduce the PVC product processing process precipitation phenomenon.
At present the domestic market PE wax are mostly divided into several:
1. Ethylene homopolymerized PE wax, the production of PE wax outside the lubrication performance, high gloss, narrow molecular weight distribution, quality is very stable, on behalf of products such as the United States Honeywell's A-C series.
2. Ethylene polymerization process by-product, commonly known as vice brand of wax, through the purification process, the purification of the PE wax, the product viscosity is low, high melting point, external lubrication performance, low prices, but the quality of raw materials and process changes A certain degree of volatility, due to the characteristics of refining process, the product will inevitably have more low melting point components.
3. PVC thermal stability of low molecular weight polyethylene cracking products, commonly known as cracked wax, the cracking process is simple and easy to operate, but the product molecular weight distribution with the production process has a certain fluctuation, the quality is relatively good, there will still be a small part of the low Melting point components.
