application

The resin for producing PVC plastic profiles is polyvinyl chloride resin (PVC). Polyvinyl chloride is a polymer made of vinyl chloride monomer.

The PVC resin can be classified into two types, a loose type (XS) and a compact type (XJ), depending on the dispersing agent in the polymerization. The loose particle size is 0.1-0.2mm, the surface is irregular, porous, cotton-like, easy to absorb plasticizer, compact particle size is less than 0.1mm, surface is regular, solid, table tennis, difficult to absorb plasticizer, At present, more loose types are used.

PVC can be divided into ordinary grade (toxic PVC) and sanitary grade (non-toxic PVC). Hygienic grade requires a vinyl chloride (VC) content of less than 10 × 10-6, which can be used in food and medicine. Different synthetic processes, PVC can be divided into suspension PVC and emulsion PVC. According to the national standard GB/T5761-93 “Inspection standard for general-purpose polyvinyl chloride resin for suspension method”, the suspension method PVC is divided into PVC-SG1 to PVC-SG8 eight kinds of resins, wherein the smaller the number, the greater the degree of polymerization, the molecular weight is also The larger the strength, the higher the melt flow, and the more difficult the processing.

When selecting a soft product, PVC-SG1, PVC-SG2, and PVC-SG3 are generally used, and a large amount of plasticizer needs to be added. For example, a polyvinyl chloride film is made of SG-2 resin, and 50 to 80 parts of a plasticizer is added. When processing hard products, plasticizers are generally not added or added in small amounts, so PVC-SG4, PVC-SG5, PVC-SG6, PVC-SG7, and PVC-SG8 are used.

For example, SG-4 resin is used for PVC hard pipe, SG-5 resin is used for plastic door and window profile, SG-6 resin is used for hard transparent film, and SG-7 and SG-8 resin are used for hard foamed profile. The emulsion method PVC paste is mainly used for artificial leather, wallpaper, floor leather and plastic products. Some PVC resin manufacturers ship PVC resin according to the degree of polymerization (degree of polymerization is the number of unit links, the degree of polymerization multiplied by the molecular weight of the chain is equal to the molecular weight of the polymer), such as PVC resin produced by Shandong Qilu Petrochemical Plant, the factory products It is S-700; S-800; S-1000; S-1100; S-1200.

The SG-5 resin has a degree of polymerization of from 1,000 to 1,100. The PVC powder is a white powder having a density between 1.35 and 1.45 g/cm3 and an apparent density of 0.4 to 0.5 g/cm3. We regard the content of plasticizers in PVC products as soft and hard products. Generally, the plasticizer content is 0~5 parts for hard products, 5~25 parts for semi-hard products, and more than 25 parts for soft products.

Zibo Junhai Chemical  are top supplier of Pvc Resin . We can supply PVC Resin S3, PVC Resin SG5, PVC Resin SG8, PVC Resin S700, PVC Resin S1000, PVC Resin S1300 ext. And it is from top manufacturers of China , Such as Erdos PVC Resin , Sinopec PVC Resin , Beiyuan PVC Resin , Xinfa PVC Resin , Zhong tai PVC Resin , Tianye PVC Resin . ext.

Polyvinyl chloride has the outstanding characteristics of abundant raw materials (oil, limestone, coke, salt and natural gas), mature manufacturing process, low price, and wide range of uses. It has become the second largest general-purpose resin in the world after polyethylene resin. 29% of the world’s total synthetic resin consumption. Polyvinyl chloride is easy to process and can be processed by molding, laminating, injection molding, extrusion, calendering, blow molding, etc. Polyvinyl chloride is mainly used to produce soft plastic products such as artificial leather, films, and wire sheaths, as well as hard plastic products such as plates, doors and windows, pipes and valves.