Up to now, thousands of polymer materials have been synthesized, and more than 100 kinds of industrial materials have been synthesized. More than 90% of the resin materials commonly used in plastics are concentrated in five general-purpose resins (PE, PP, PVC, PS, ABS). At present, it is very difficult to continue to synthesize a large number of new polymer materials, which is neither economic nor realistic. Therefore, in-depth study of the relationship between polymer composition, structure and properties, and on the basis of the modification of existing plastics to manufacture suitable new plastic materials, has become one of the effective ways to develop the plastics industry, global improvement The plastics industry has therefore made considerable progress in recent years. Plastic modification refers to the physical, chemical or both ways to change the performance of plastic materials in the direction expected, or to significantly reduce costs, or to improve certain properties, or to give plastic New features in materials. The modification process may occur during the polymerization of the synthetic resin, that is, chemical modification, such as copolymerization, grafting, crosslinking, etc., or may be performed during the process of processing the synthetic resin, that is, physical modification, such as filling, total Mix, enhance, etc. The term "plastic modification" refers to a method of expanding the scope of its application by adding one or more other substances to the plastic resin to change its original performance and improve one or more aspects of performance. The modified plastic materials are collectively referred to as "modified plastics". There are roughly the following types of plastic modification methods: 1. Enhancement: The purpose of increasing the rigidity and strength of the material by adding fibrous or flaky fillers such as glass fiber, carbon fiber and mica powder, such as glass fiber reinforced nylon used in electric tools. 2, toughening: through the addition of rubber, thermoplastic elastomers and other substances in the plastic to achieve its purpose of improving the toughness / impact strength, such as automotive, home appliances and industrial applications in the toughened polypropylene. 3. Blending: Mixing two or more incompletely compatible polymer materials into a mixture of macroscopic compatibility and microscopic phase separation to meet certain physical and mechanical properties, optical properties, processing properties, etc. The method required. 4, alloy: similar to blending, but the compatibility between components is good, easy to form a homogeneous system, and can get some properties that can not be achieved by a single component, such as PC / ABS alloy, or PS modified PPO. 5. Filling: The purpose of improving physical and mechanical properties or reducing costs by adding fillers to plastics. 6. Other modification: such as using conductive filler to reduce the resistivity of plastic; adding antioxidant/light stabilizer to improve the weather resistance of the material; adding pigment/dye to change the color of the material, adding internal/external lubricant to make the material The processing properties are improved, and the nucleating agent is used to change the crystallization characteristics of the semi-crystalline plastic to improve its mechanical properties and optical properties. In addition to the above physical modification methods, there are also methods for modifying plastics by chemical reaction to obtain specific properties, such as maleic anhydride grafted polyolefin, cross-linking of polyethylene, and utilization of peroxides in the textile industry. Degradation of the resin to improve fluidity/fiber-forming properties, etc., is not the case. A variety of modification methods are often used together in the industry, such as adding a toughening agent such as rubber in the plastic reinforcement modification process without excessive loss of impact strength; or physical mixing in the production of thermoplastic vulcanizate (TPV). And chemical cross-linking, etc... In fact, any plastic raw material contains at least a certain proportion of stabilizers at the factory to prevent its degradation during storage, transportation and processing. Therefore, "non-modified plastics" in the strict sense do not exist. However, in the industry, the base resin produced by the chemical plant is usually referred to as "unmodified plastic" or "pure resin". Woven Wire Mesh,Woven Steel Mesh,Metal Woven Wire Mesh,Architectural Woven Mesh ANPING HONGYU WIREMESH CO.,LTD , https://www.hongyu-wiremesh.com
This picture shows the flow chart of the plastic industry chain. The picture shows the process of modified plastic Equipment required for the modification plant Equipment required for the modification plant
Modified plastic production process
Plastic is a kind of polymer with polymer as the main component. It is composed of synthetic resin and filler, plasticizer, stabilizer, lubricant, colorant and other additives. It is in a fluid state during manufacturing and processing to facilitate modeling. , showing a solid shape when the processing is completed. The main component of plastics is synthetic resin. The resin is originally named by a lipid secreted by plants and animals, such as rosin, shellac, etc., and a synthetic resin (sometimes abbreviated as "resin") is a polymer which has not been mixed with various additives. Resin accounts for about 40% to 100% of the total weight of the plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role. With the development of the plastics industry, a rational division of labor in the plastics industry has created a relatively independent industry between large petrochemical companies producing synthetic resins and plastics processing companies producing specific plastic products. This industry produces a variety of uses and characteristics. The intermediate particle material is the main product, namely the modified plastics industry. The company specializes in the production of modified plastics, which are used to produce additives such as general-purpose resin additives, color masterbatch and functional masterbatch for downstream industries such as household appliances, automobiles, electrical and electronic, office equipment, and power tools. The modified plastic particles are further processed into modified plastic products as parts for home appliances and automobiles.