The difference between UPVC and PVC is as follows:
1, UPVC pipe is the meaning of stearic polyvinyl chloride, good quality, suitable for industrial wastewater, food-grade ultra-pure water, reverse osmosis and other water treatment equipment, plating equipment, etc., a wide range of uses.PVC pipe is the meaning of polyvinyl chloride, generally poorer quality, hardness is not enough, easy to aging, etc., used for drainage pipes.
2, UPVC in the U, it is the original text is unplasticized, in the manufacture of PVC raw materials without the addition of plasticizer PVC raw materials called UPVC or PVCU. did not add plasticizer, PVC raw materials in the chlorine will be all volatilized, and add plasticizer PVC raw materials, there are a lot of residual chlorine can not be volatilized.
3, UPVC is the basis of PVC to improve the performance of the product, UPVC water pipe no residual chlorine release, PVC water pipe will have residual chlorine release.
Extended information:
UPVC must be modified granulation, can be used. PVC is brittle, poor thermal stability, not easy to process. Can not be used directly, must be modified and mixed, add the relevant additives, the most common modification is modified granulation. Strictly speaking, with special requirements of PVC products PVC modification formula, is tailored to customer requirements.
At present, the domestic PVC modified material formula design, a number of products have been exported to foreign countries, access to some of the independent intellectual property rights; UPVC particles at room temperature for 24 hours, the amount of water absorption is less than 0.02%, and therefore do not need to dry. If it must be dried, it can be put into 60-70℃ hot gas furnace for 3 hours, or 80℃ dryer for 1-1.5 hours.
Recycled materials can be used up to 20% mixed with new materials, the amount of recycled materials depends on the end use of the products. Misuse of recycled materials can make the injection molding failure, not only recycled too much of the ingredients, but more because the material has been reprocessed many times. The quality of the recycled material decreases more with each additional recycling.
Baidu Encyclopedia - UPVC
Baidu Encyclopedia - PVC