Power conduit caps, also known as power conduit inner blocks or inner plugs, are widely used, easy to install, and commonly found in people's daily lives.

Electrical conduit caps in hot solvents can lead to the dissolution of certain thermoplastic materials, such as polyethylene dissolving in xylene. Thermosetting plastics cannot be dissolved in solvents. As a source of rapid industry development, the plastic bottle cap industry holds great potential. For high-quality products like electrical conduit plugs and stoppers, when using solid powder or granular additives, they must be ground on a three-roll mill equipped with plasticizers and plastic valve caps.