Plastics classification by molding methods
According to the different molding methods of various plastics, it can be divided into film pressing, lamination, injection, extrusion, blow molding, casting plastics and reaction injection plastics.
1. Film pressure plastics are mostly plastics whose physical properties and processing properties are similar to those of general solid plastics;
2. Laminated plastic refers to the fiber fabric impregnated with resin, which is combined into a whole by laminating and hot pressing;
3. Injection, extrusion and blow molding are mostly plastics with physical properties and processing properties similar to those of general thermoplastics;
4. Casting plastic refers to the liquid resin mixture that can be poured into the mold and hardened into a certain shape product under the condition of no pressure or a little pressure, such as MC nylon, etc.;
5. Reaction injection plastics are plastics that use liquid raw materials to be injected into the membrane cavity under pressure to make them react and solidify into a certain shape product, such as polyurethane.