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[Chemical Knowledge]：Difference between PVC paste resin and PVC powder

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With the development of science and technology, polyvinyl chloride (PVC) is more and more widely used in various fields. As an important synthetic material, PVC has attracted much attention for its excellent properties and various forms. PVC products usually include PVC paste resin and PVC powder, although they are made of polyvinyl chloride, but there are some obvious differences.

PVC paste resin is a white solid made by mixing PVC resin with plasticizers and other auxiliaries and using thermal polymerization process. It has excellent fluidity and processability, and can be adjusted to different viscosity and rheology according to needs. PVC paste resin is usually used in the production of glue, ink, paint and other products, as well as the coating processing of plastic products.

In contrast, PVC powder is a powder made of PVC resin through mechanical crushing, classification and screening. It has a larger particle size and lower viscosity, suitable for molding, extrusion and other processing methods. PVC powder is usually used to make hard plastic products, such as pipes, plates, wire and cable sleeves, etc. It can also adjust physical properties such as color, transparency and hardness by adding various additives and pigments.

in terms of physical properties, PVC paste resin and PVC powder also have some differences. Polyvinyl chloride paste resin due to the use of thermal polymerization process, the degree of cross-linking between molecules is higher, so its mechanical strength and heat resistance is higher. The PVC powder due to the differences in the process, the degree of crosslinking is low, so its toughness and impact resistance is better. According to different use environment and requirements, suitable materials can be selected.

in the application, PVC paste resin and PVC powder also have their own advantages. Due to its excellent fluidity and processability, polyvinyl chloride paste resin is usually used to make products such as films, tapes, coatings, etc., as well as the production of primers and packaging materials. Because of its good toughness and strength, PVC powder is often used in the manufacture of pipes, doors and windows, wire and cable sleeves and other products with high durability requirements.

In summary, there are obvious differences in the manufacturing process, physical properties and applications of PVC paste resin and PVC powder. Understanding these differences helps us to better select suitable materials to meet the requirements of different fields and needs. In the future, with the advancement of technology, the application fields of these two materials will continue to expand and make greater contributions to the development of various industries.

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