초록

A mixture of water and surfactant is introduced interiorly of a parison in the course of blow molding thereof. Lessening of die closure time and improved conformity of dimensions of molded articles to corresponding dimensions of forming dies are achieved.

대표청구항 ▼

In a method comprising the step of introducing pressurized air interiorly of a parison of thermoplastic material at a sufficient pressure to transform the parison into a hollow article, the improvement comprising the steps of: (a) providing a mixture of water and surface active matter, said mixture

In a method comprising the step of introducing pressurized air interiorly of a parison of thermoplastic material at a sufficient pressure to transform the parison into a hollow article, the improvement comprising the steps of: (a) providing a mixture of water and surface active matter, said mixture including said surface active matter in percentage of from 0.023 percent to 0.36 percent of the liquid volume of said mixture; and (b) introducing said mixture into the interior surface of said parison in the course of air pressurization of said parison.