NON-CONTAMINATING HEAT SEAL FORMULATION
Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
A release and transfer substrate for receiving an image from an electrostato-graphic copying machine, particularly a color copier, in which the image from the copying machine is received by the substrate for subsequent transfer to other materials, such as T-shirts, is disclosed. The substrate, for example, a sheet of release paper, is coated with a mixture of about 70% Elvax 250 (an ethylene vinyl acetate polymer available from the E. I du Pont de Nemours Company and believed to contain about 27 - 29% vinyl acetate) and about 30% Bareco 1000 Polywax (a high-molecular weight ethylene homopolymer available from the Petrolite Com-pany) by hot-melt method. The thickness of the coating may be varied between about 0.25 to 1.5 mils, but I preferred to use a coating of about 0.5 mil thick. Such a coated sheet will receive the image from the copying machine without contaminating the internal components of the copier. An image carried by such a sheet can be transferred onto a fabric material at a sealing temperature of about 325'F plus or minus 25' with a dwell time of about 30 seconds. After the paper substrate is peeled off, a good, durable heat seal is produced on the fabric material.