Transfer printing method and system for printing images on a workpiece with supercritical fluid

摘要

The present invention relates to a transfer printing method and a system using the method for printing images on a workpiece with supercritical fluid. The method includes disposing the workpiece inside the first mold and disposing a transfer film above the workpiece, closing the first mold with a second mold and injecting pressured gas, whose pressure is greater than a critical pressure, into the first mold and the second mold, ensuring a temperature of the pressured gas being greater than a critical temperature so as to convert into supercritical fluid, softening the transfer film with the supercritical fluid, transferring an adhesive layer, a print layer and a hardening layer of the transfer film onto the workpiece, and opening the first mold and the second mold to take out the workpiece.

主权项

1. A transfer printing method for printing images on a workpiece with supercritical fluid, the transfer printing method comprising:
disposing the workpiece inside a first mold and disposing a transfer film above the workpiece; closing the first mold with a second mold and injecting pressurized gas, whose pressure is greater than a critical pressure, into the first mold and the second mold; ensuring a temperature of the pressurized gas being greater than a critical temperature so as to convert into supercritical fluid; softening the transfer film with the supercritical fluid; discharging the pressure inside the first mold for generating a pressure drop between the first mold and the second mold so as to paste the transfer film on the workpiece after softening the transfer film with the supercritical fluid; transferring an adhesive layer, a print layer and a hardening layer of the transfer film onto the workpiece; and opening the first mold and the second mold to take out the workpiece.