Polypropylene, PP, is a material made of propylene polymerization. It is widely used in small household appliances, automobiles and other fields. Because of its high hygiene and high temperature resistance, it is widely used in medical treatment. The application in the field is also very wide, such as disposable masks, protective clothing, etc., so what are the characteristics of polypropylene?
What are the applications of its materials? When it comes to a material, we must first understand their properties, their pros and cons, and then talk about their modification and application range. Polypropylene, I believe everyone is familiar with it, is a general-purpose plastic. It has three main advantages. One is strong heat resistance. The heat resistance of general-purpose resins is basically around 80 degrees Celsius, while the heat resistance of pure PP is The heat resistance can be as high as 100 degrees Celsius. If glass fiber, slick lime and other materials are added to the PP material, its heat resistance will be greatly enhanced to above 150 degrees Celsius; secondly, it has strong resistance to bending, and PP is commonly known as foldable glue. strong. The folding endurance is much higher than that of some hard plastics; thirdly: strong electrochemical properties, PP plastics can withstand a variety of solvents, except for concentrated acid and concentrated alkaline products, and for electrical insulation, PP has excellent electrical insulation, Because PP material does not absorb water, its insulation is completely unaffected by humidity.
Of course, polypropylene materials also have certain shortcomings. The biggest disadvantage is that the impact resistance is poor. After impact, the material is prone to brittleness and fracture. Second, the weather resistance is extremely poor, and the material is very easy to become brittle at low temperature. In addition, under strong sunlight and ultraviolet radiation, polypropylene plastics will also become brittle, and polypropylene products are easy to age and yellow in color. In addition, the thermal stability of polypropylene is not high, and the performance of the material will be greatly reduced in a high-heat and high-pressure environment.
In order to improve these shortcomings and make the application range of PP materials wider, there are three commonly used PP modification methods, namely filling modification, crosslinking modification, and copolymerization modification; filling modification is adding slip lime to PP material. , limestone and other products to increase its hardness, flame retardancy and other properties; copolymerization modification, usually copolymerization of PP resin with different materials such as PE resin and rubber to enhance its impact resistance and so on.
The modified PP can be widely used in small home appliances, automobiles, medical and other fields, such as the automobile industry, dashboard panels, bumpers, decorative panels, door guards, etc. In the field of home appliances, polypropylene materials can be used as spare parts for washing machines, refrigerators, and air conditioners. In the medical field, in addition to disposable medical supplies, it can also be used as artificial kidney splints, artificial lungs and other products.
