First, the definition of plastic Outdoor Furniture ,Garden Furniture Sofa,Table And Chairs Outdoor,Bamboo Lounge Chair Foshan Shunde Zhili Furniture Company , https://www.zhilioutdoor.com
Plastic is a polymer organic material with resin as the main component, which is shaped into a certain shape under a certain temperature and pressure, and can maintain a predetermined shape at normal temperature.
Resin refers to an organic polymer that usually has a conversion or melting range when heated, and fluidity when converted by external forces. It is a solid or semi-solid or liquid organic polymer at room temperature. It is the most basic and most important component of plastic. Broadly speaking, any polymer that is the basic material of plastics in the plastics industry can be called a resin.
Second, the classification of plastic
There is no exact classification of plastics at present, the general classification is as follows:
1. According to the physical and chemical properties of plastics
Thermoplastics: Plastics that can be repeatedly heated to soften and cool hardened within a specific temperature range. Such as polyethylene plastic, polyvinyl chloride plastic.
Thermosetting plastics: plastics that can be cured into infusible and insoluble materials due to heat or other conditions. Such as phenolic plastic, epoxy plastic, etc.
2. Select by plastic
General-purpose plastics:-Generally refers to plastics with large output, wide usage, good moldability and low price. Such as polyethylene, polypropylene, polyvinyl chloride, etc.
Engineering plastics:-Generally, it can withstand a certain external force, and has good mechanical properties and dimensional stability. It can still maintain its excellent performance at high and low temperatures, and can be used as engineering structural plastics. Such as ABS, nylon, polyaluminum, etc.
Special plastics:-Generally refers to plastics with special functions (such as heat resistance, self-lubrication, etc.), which are used for special requirements. Such as fluoroplastics, silicone, etc.
3. According to plastic molding method
Molded plastic: a resin mixture for molding. Such as general thermosetting plastics.
Laminated plastic: Refers to the fiber fabric impregnated with resin, which can be combined into a whole material by lamination and hot pressing.
Injection, extrusion and blow molding plastics: -Generally it refers to the resin mixing department that can melt and flow at the temperature of the barrel and quickly harden in the mold. Such as general thermoplastics.
Cast plastic: Liquid resin mixture that can be poured into a mold and can be hardened into a certain shape without pressure or a little pressure. Such as MC nylon.
Reaction injection molding compound: Generally refers to liquid raw materials, which are injected into the mold cavity under pressure to react and solidify the finished product. Such as polyurethane.
4. By plastic semi-finished products and products
Molding powder: Also known as plastic powder, it is mainly obtained by thermosetting resin (such as phenolic) and filler, etc. after fully mixed, pressed and crushed. Such as phenolic plastic powder.
Reinforced plastics: A class of plastics with reinforced materials and some mechanical properties that are greatly improved over the original resin.
Foam plastic: Plastic with countless micropores in the whole.
Film: Generally refers to flat and soft plastic products with a thickness of less than O.25 mm.
In addition, engineering plastics, reinforced plastics and foam plastics have different categories, see the following table:
Classification of engineering plastics
Category Polymer
General engineering plastics nylon, polyoxymethylene, polycarbonate, modified polyphenylene ether, thermoplastic polyester, ultra-high molecular weight polyethylene, methylpentene polymer, vinyl alcohol copolymer
Special engineering plastics non-crosslinked polyaluminum, polyether alum, polyphenylene sulfide, polyarylate, polyimide, polyether ether ketone, fluororesin, etc.
Cross-linked polyaminobismaleamide, polytriazine, cross-linked polyimide, heat-resistant epoxy resin, etc.
Classification of reinforced plastics
According to the shape of the reinforcement material, granular reinforced plastics such as calcium plastic plastic fiber reinforced plastics such as glass fiber or glass cloth reinforced plastics sheet reinforced plastics such as mica reinforced plastics
According to the material classification of reinforcement materials, cloth base, asbestos reinforced plastics such as rag reinforced plastics inorganic mineral filled plastics such as quartz, mica filled plastics glass fiber reinforced plastics such as prepreg, SMC, BMC and other special fiber reinforced plastics such as carbon fiber, Kevlar Fiber reinforced plastics, metal fiber reinforced plastics such as steel wire reinforced plastics