There are many kinds of Bakelite Parts, which can be divided into thermosetting plastic parts and thermoplastic plastic parts according to their different thermal properties. Thermosetting plastics refer to plastics that are not softened by heat but can only be molded once after being cured once. This kind of plastic has good heat resistance and is not easy to deform under pressure, but its mechanical properties are poor. Thermoplastic refers to plastic that softens when heated, hardens when cooled, softens again when heated, hardens again when cooled, and can be repeatedly heated and remanufactured many times. This kind of plastic is easy to process and form and has good mechanical properties, but its heat resistance is relatively poor and easy to deform. The quantity of thermoplastic plastics is very large, accounting for about 80% of all plastics. 1. Check IS0 code on plastic parts: plastic parts produced by regular manufacturers will be printed with ISO international symbol mark, namely plastic code, on the back of the workpiece. 2. Check the maintenance manual: you can also find the body maintenance manual and check the plastic types of components. 3. Identification of combustion Cut off a small piece of plastic, clamp it in the fire with tweezers and burn it, check its flame color, burning condition and smell. For example, PVC plastic is easy to melt when heated, and the flame is green or cyan when burning, with hydrochloric acid taste. The flame of polyolefin plastics when burning has no obvious smoke and has the smell of wax. Polyester cellulose plastic has acetic acid taste after ignition. When ABS plastic burns, there is obvious smoke generation. 4. Welding method With different types of plastic welding rod and plastic for trial welding, can be welded with this type of welding rod type of plastic varieties. 5. Percussion The sound of PU plastic is weaker and that of PP plastic is brittle when the inner side of plastic products is knocked by hand. 6. Other simple identification methods PU plastic has no powder after sandpaper polishing, while PP plastic has powder. PU plastic is easy to scratch, PP plastic is not easy to scratch, etc. Nbstarlite is a professional mechanical equipment design and supplier. Our Metal Stamping Parts have won the favor and love of the vast number of consumers in the market. If you also have this demand, please leave us a message and let our profession give you a rest assured and guarantee.