Basic knowledge of plastics

Extrusion Blowing Hollow plastic molding machine is the main equipment for forming hollow containers. 80% to 90% of the world 's hollow containers are formed by extrusion blow molding. In the development process of hollow plastic molding machines in China, extrusion blow hollow plastic molding machines are the fastest growing and most complete hollow plastic molding machines, especially the development speed of small-sized extrusion blow molding machines (TodayHot) plastic molding machines. At present, many manufacturers in China have been able to produce extruded blow-molded hollow plastic molding machines that form 1000L single-layer hollow containers.
     Plastic refers to the resin (or direct polymerization of monomers used in the process of processing) as the main component, plasticizers, fillers, lubricants, colorants and other additives as ancillary components, in the process of flow molding material. In daily life, people often deal with plastic bags, but the plastic bags used to hold foods in the market are made of polyethylene and are non-toxic, while some plastic bags made of PVC are toxic. It cannot be used to hold food.
     In order to reduce the cost of plastic products, improve and improve the performance of certain aspects of plastic materials, increase the functionality, and develop environmentally friendly plastic materials, as a new chemical discipline, the research and development of plastic modification technology is increasingly People pay attention and attention. With the immature industrialization conditions of fully degradable plastics, we will continue to accelerate research on environmentally friendly modified plastics to reduce the rising cost of raw materials and the dual pressures of environmental protection on the plastics industry. We will develop the modified plastics industry and become China’s plastics industry. Second choice.
     Plastic modification, in a general sense, is to add appropriate modifiers to the modified plastic material ( synthetic resin ) , adopt a certain processing and molding process, so as to obtain novel structural features and meet applicable performance requirements. New plastic materials and methods.
     It is precisely because of this that modified plastics have become a plastics industry that covers a wide range of fields, has a high technological content, and can create enormous economic benefits. At present, the scientific community and industry in the world have realized the importance of the coordinated development of plastic materials and the environment. They are working hard to develop good cost-effective plastic materials, improve their service life, minimize the use of plastics, and fully The plasticity of plastics is used to recycle and comprehensively utilize the waste plastic materials and reduce the pressure of plastic materials on the environment.
     Identification of whether the plastic bag has no toxicity method: hand touch and color detection method: non-toxic milky white or colorless, hand touch with a sense of lubrication, the surface like a waxy feeling; toxic color turbidity or yellow, red, black, feel Sticky. Jitter detection method: Hold the plastic bag and shake it with a strong voice. The sound is crisp and non-toxic; the sound is boring and toxic. Fire detection method: non-toxic flammable, flame tip yellow, partially blue, burning like a candle, with a paraffinic taste; toxic non-flammable, extinguishing from the fire, the flame tip is yellow, the bottom is green, Softening can be drawn into a filament
     Plastics have the following characteristics: 1 Most plastics are light, chemically stable, and will not rust; 2 good impact resistance; 3 have good transparency and wear resistance; 4 good insulation, low thermal conductivity; ⑤ general moldability, good color, low processing costs; ⑥ most plastics poor heat resistance, large thermal expansion coefficient, flammable; difference ⑦ dimensional stability, is easily deformed; ⑧ most plastics poor low temperature, low temperature brittle; ⑨ easy Aging; 10 Some plastics are easily dissolved in solvents.