① General purpose plastics-generally refers to plastics with large output, wide use, good formability and low price. There are five kinds of general plastics, namely polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile butadiene styrene (ABS). They are all thermoplastic.
(2) Engineering plastics-generally refers to plastics that can withstand certain external forces, have good mechanical properties, high and low temperature resistance and good dimensional stability, and can be used as engineering structures, such as polyamide and polysulfone. Engineering plastics are divided into general engineering plastics and special I-direction plastics.
③ Special plastics generally refer to plastics with special functions, which can be used in special application fields such as aviation and aerospace. For example, fluoroplastics and silicone resins have outstanding special functions such as high temperature resistance and self-lubrication, while reinforced plastics and foamed plastics have special properties such as high strength and high cushioning. These plastics belong to the category of special plastics.
Use classification:
① Ordinary plastics
-Generally refers to plastics with large output, wide use, good formability and low price. There are five kinds of general plastic particles, namely polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile butadiene styrene (ABS).
These five kinds of plastics account for the vast majority of plastic raw materials, and the rest can basically be classified as special plastic varieties, such as PPS, PPO, PA, PC, POM and so on. It is rarely used in daily life products, mainly in high-end fields such as engineering industry and national defense technology, such as automobiles, aerospace, architecture, communications and so on. Plastics can be divided into thermoplastics and thermosetting plastics according to their plasticity. Generally speaking, thermoplastic products can be recycled, but thermosetting plastics can't. According to the optical properties of plastics, they can be divided into transparent, translucent and opaque raw materials, such as PS, PMMA, AS and PC, which belong to transparent plastics, while other plastics are mostly opaque plastics.
② Engineering plastics
Engineering plastics can meet higher requirements in durability, corrosion resistance, heat resistance and other aspects, and can be processed more conveniently, and can replace metal materials. Engineering plastics are widely used in electronics, automobile manufacturing, office equipment, machinery, aerospace and other industries. Replacing steel with plastic and wood with plastic has become an international fashion trend.
General engineering plastics include: polyamide, polyoxymethylene, polycarbonate, modified polyphenylene ether, thermoplastic polyester, ultra-high molecular weight polyethylene, methylpentene polymer, vinyl alcohol polymer and so on.
③ Special plastics
-Universal refers to plastics with special functions, which can be used in special application fields such as aviation and aerospace. For example, fluoroplastics and silicone resins have outstanding special functions such as high temperature resistance and self-lubrication, while reinforced plastics and foamed plastics have special properties such as high strength and high cushioning. These plastics belong to the category of special plastics.
A. Reinforced plastics: From the appearance, reinforced plastics can be divided into three types: granular (such as calcium-plastic reinforced plastics), fibrous (such as glass fiber or glass cloth reinforced plastics) and granular (such as mica reinforced plastics). According to the materials, it can be divided into three types: cloth reinforced plastics (such as rag reinforced plastics or asbestos reinforced plastics), inorganic mineral filled plastics (such as timely or mica filled plastics) and fiber reinforced plastics (such as carbon fiber reinforced plastics).
B. Foam: Foam can be divided into hard, semi-hard and soft foams. Rigid foam has no flexibility and high compressive hardness. It can only be deformed when it reaches a certain stress value, and it cannot be restored to its original state after the force is released. Flexible foam has elasticity, low compressive hardness and easy deformation, and can be restored to its original state after force is released with little residual deformation; The flexibility and other properties of semi-rigid foam are between rigid foam and soft foam.
You can also go to the physical attribute table to search, there are many worthy of reference.