The surface of bakelite is hard, and there is a sound of wood when it is struck. It is mostly opaque and dark (brown or black), and it does not become soft in hot water. It is an insulator, its main component is phenolic resin. The characteristics of bakelite powder are non-absorbent, non-conductive, high temperature resistant, and high strength. Because it is used in electrical appliances, it is called bakelite. Bakelite is made of powdered phenolic resin, mixed with sawdust, asbestos, or clay, and then pressed into a finished product at a high temperature.

1. Bakelite is a cross-linked polymer obtained by polycondensation reaction of phenol and formaldehyde, and it is a high molecular compound.

2. Bakelite powder is a thermosetting plastic, which undergoes polymerization during the injection molding process. Through the action of a cross-linking agent (or bridging agent), chemical cross-links are formed between the molecular chains to form a compact outline structure. Outline polymer.

3. The cross-linking reaction is to re-react the linear polymer into an outline polymer. The polymer after the cross-linking reaction may have the following characteristics:

(1) Reduced elasticity.

(2) Increased hardness.

(3) Thermoplasticity is lost, that is, it becomes a thermosetting polymer.

(4) Not easy to decompose.