For PVC pipe fittings, the factors affecting VEKA are as follows:
1, A variety of lubricants to reduce VEKA;
2, Liquid additives to reduce VEKA;
3, CPE lower VEKA;
4, Filling in a certain range to increase VEKA;
5, ACR additives increase VEKA;
6, The choice of the appropriate resin also has a greater impact on VEKA;
Try to eliminate the internal stress of injection molding products, such as the use of multistage injection glue, to maintain the appropriate mold temperature, product annealing treatment.
1, Add CPVC resin, pure CPVC resin, VEKA softening point is about 128 degrees, mixed with good CPVC COMPOUND, injection grade VEKA softening point is above 103 degrees, extrusion grade VEKA softening point is above 110 degrees (add lubricant, organic tin stabilizer will reduce VEKA). How many CPVC resins are added in CPVC to meet your requirements, you can adjust it by yourself. The advantage is that the price is low, but the disadvantage is the technical is difficulty.
2, Add PVDF resin, pure PVDF resin, VEKA softening point is about 140 degrees, directly added, not burning, non decomposition, weather resistance is also the best. The disadvantage is that the price is too expensive, the advantage is that the technology is not difficult. You can think about finding some cheaper material to reduce costs.
3, The solid plasticizer can help to improve the softening point temperature of VEKA. The technology is not difficult, and the formula should be adjusted properly.
4, The use of filler nano calcium carbonate can help to improve the softening point temperature of VEKA. Superior performance than light calcium or activity calcium, is a good choice. The color is good too.
5, The use of PVC to enhance the modifier is helpful to improve the softening point temperature of VEKA. In contrast, the new type of additives can help a lot of busy, more
experiments, more summary. There will be solutions.