Heat transfer methods of applying a coated image on a substrate where the unimaged areas are uncoated
View Patent ↗Methods and products for forming a coated image on a substrate are generally disclosed. The methods can include forming an image on a printable surface of a transfer coating layer of a printable transfer sheet. In a separate step, the negative mirror image of that same image is printed with toners on a toner printable sheet. After registering the sheets together, a portion of the transfer coating layer of the printable transfer sheet is transferred to the toner printable sheet, such that the portion of the transfer coating layer transferred to the toner printable sheet corresponds to the imaged areas on the toner printable sheet. However, the image formed on the printable surface of the transfer coating layer and the underlying transfer coating substantially remain on the printable transfer sheet. Thereafter, the image and the transfer coating layer remaining on the printable transfer sheet are transferred to a substrate.
1. A method of forming a coated image on a substrate, the method comprising:
forming an image on a printable surface of a transfer coating layer of a printable transfer sheet;
printing a negative mirror image on a toner printable sheet, wherein the negative mirror image defines imaged areas having toner ink and unimaged areas that are substantially free of toner ink, wherein the negative mirror image substantially forms a mirror image of the image formed on the printable surface of the transfer coating layer of the printable transfer sheet in the unimaged areas of the toner printable sheet;
transferring a portion of the transfer coating layer of the printable transfer sheet to the toner printable sheet, wherein the portion of the transfer coating layer transferred to the printable transfer sheet corresponds to the imaged areas on the toner printable sheet such that the image and the underlying transfer coating of the printable transfer sheet substantially remains on the printable transfer sheet; and
thereafter, transferring the image and the transfer coating layer remaining on the printable transfer sheet to the substrate.
2. A method as in claim 1 , wherein the portion of the transfer coating layer of the printable transfer sheet is transferred to the toner printable sheet at a first transfer temperature of less than about 150° C.
3. A method as in claim 1 , wherein the image and the transfer coating layer remaining on the printable transfer sheet is transferred to the substrate at a second transfer temperature of greater than about 150° C.
4. A method as in claim 1 , wherein the transfer coating layer comprises a powdered thermoplastic polymer and a film-forming binder.
5. A method as in claim 4 , wherein the transfer coating layer further comprises a viscosity modifier.
6. A method as in claim 1 , wherein the negative mirror image is laser printed on the toner printable sheet by a laser printer or a laser copier.
7. A method as in claim 1 , wherein the substrate having the coated image is substantially free from the transfer coating layer in unimaged areas.
8. A method of forming a coated image on a substrate such that unimaged areas of the substrate are substantially free from the coating, the method comprising:
applying an ink onto a printable surface of a transfer coating layer of a printable transfer sheet, wherein the ink defines an image on the printable surface;
printing a negative mirror image on a toner printable sheet, wherein the negative mirror image defines imaged areas having toner ink and unimaged areas that are free of toner ink, wherein the negative mirror image substantially forms the mirror image of the image applied to the printable surface of the transfer coating layer of the printable transfer sheet in the unimaged areas of the toner printable sheet;
registering and contacting the printable transfer sheet and the toner printable sheet, wherein the image on the printable surface of the transfer coating layer of the printable transfer sheet substantially contacts only unimaged areas of the toner printable sheet;
transferring a portion of the transfer coating layer of the printable transfer sheet to the toner printable sheet to form an intermediate imaged transfer sheet, wherein the portion of the transfer coating layer transferred to the printable transfer sheet substantially corresponds to the imaged areas on the toner printable sheet, and wherein the image applied to the transfer coating layer substantially remains on the intermediate imaged transfer sheet; and
transferring the image and the transfer coating layer remaining on the intermediate imaged transfer sheet to the substrate.
9. A method as in claim 8 , wherein the portion of the transfer coating layer of the printable transfer sheet is transferred to the toner printable sheet at a first transfer temperature of less than about 150° C.
10. A method as in claim 8 , wherein the image and the transfer coating layer remaining on the printable transfer sheet is transferred to the substrate at a second transfer temperature of greater than about 150° C.
11. A method as in claim 8 , wherein the transfer coating layer comprises a powdered thermoplastic polymer and a film-forming binder.
12. A method as in claim 11 , wherein the transfer coating layer further comprises a viscosity modifier.
13. A method as in claim 8 , wherein the negative image is laser printed on the toner printable sheet by a laser printer or a laser copier.