Image transfer process and transfer sheet for electrostatic dry toner copier/printer

摘要

A transfer sheet is used for transferring an image formed by electrostatic copying to a backing of textile fabric or other porous material. The transfer sheet is composed of a plain paper substrate having no release treatment or coating applied thereto, and a transfer coating of thermoplastic polymeric film material bonded to the substrate. Transfer of the image is accomplished using only the single transfer sheet. The plain paper substrate securely retains the polymeric film coating during electrostatic imprinting and avoids contamination of the copier/printer. The image can be transferred to a textile backing by applying heat of about 160° C. and 200° C. and pressure of about 50 psi for a duration of about 5 to 10 seconds, and results in a high-quality image transfer that leaves the fabric weave open to breathe. The plain paper substrate is removed after image transfer by peeling it away from the backing while still hot.