Rotational molding is a versatile process for manufacturing various hollow plastic parts. The rotational molding process uses heat and rotation along two axes to produce hollow single pieces. Molten plastic is injected into the rotating mold, and centrifugal force forces the molten plastic to adhere...

Both rotational molding and blow molding can produce hollow products, but the blow-molded hollow products or tube blanks are blown into tube films without molds by using gas pressure to blow up the hot blanks closed in the mold. It is more commonly used in the manufacture of some packaging container...

1. Release agentDuring the heating stage of the rotational molding process, chemical or physical bonding will occur at the interface between the polyethylene powder or melt and the inner surface of the mold due to surface oxidation. When there are local defects on the inner surface of the mold, the ...

Polyethylene is a high molecular compound formed by the addition polymerization of ethylene. The actual molecular weight varies from 10,000 to several million depending on the polymerization conditions. The polyethylene invented was low-density polyethylene obtained by high-pressure method, with a s...