초록 ▼

A process for fabricating a foamed plastic product. The process includes a plastic film that is prefoamed in order to introduce lamellar discontinuities such as prefoamed bubbles. The film is pressurized by a gas under a positive pressure causing the gas to diffuse into the film, forming a second fi

A process for fabricating a foamed plastic product. The process includes a plastic film that is prefoamed in order to introduce lamellar discontinuities such as prefoamed bubbles. The film is pressurized by a gas under a positive pressure causing the gas to diffuse into the film, forming a second film. Further, the second film is inflated in order to form the foamed plastic product. The second film is inflated by heating the second film at a temperature below the melting point of the second film and under a reduced pressure.

대표청구항 ▼

[ We claim:] [1.] A process for manufacturing a foamed plastic film, comprising the steps of:pressurizing a preformed plastic film with a gas under a positive pressure causing the gas to diffuse into the film to form a pressurized plastic film;wherein the pressurized plastic film has a lamellar lens

[ We claim:] [1.] A process for manufacturing a foamed plastic film, comprising the steps of:pressurizing a preformed plastic film with a gas under a positive pressure causing the gas to diffuse into the film to form a pressurized plastic film;wherein the pressurized plastic film has a lamellar lens-like or cavitated structure with lamellar structural boundary layers;inflating the pressurized plastic film by heating the film at a temperature below a melting point of the film and under a reduced pressure, thereby forming an inflated foamed plastic film having a predetermined foaming degree and allowing a thickness of the film to be increased without increasing the amount of plastic material.