Heat transfer paper with peelable film and crosslinked coatings
View Patent ↗The present invention was directed to a unique heat transfer material for use in transferring an image-bearing coating onto a substrate, such as an article of clothing. The heat transfer material of the present invention may be used in cold peel transfer processes, resulting in an image-bearing coating having superior washability, compared to conventional image-bearing coatings. Additionally, the materials may be used on dark colored fabrics without graying of the opaque background or dulling of colored images typically associated with printing on darker fabrics. The heat transfer material of the present invention produces superior results due to the addition of crosslinking agents to the coatings.
1. A method of forming an image-bearing coating on a surface, wherein the method comprises:
removing a non-transferable portion of a heat transfer material from a transferable portion of said heat transfer material, wherein the non-transferable portion of the heat transfer material comprises a substrate layer and a release coating layer, and wherein the transferable portion of the heat transfer material comprises a peelable film layer overlying said release coating layer and an opaque crosslinked polymer layer overlying said peelable film layer;
placing the peelable film layer on the surface with the opaque crosslinked polymer layer exposed; and
applying heat and pressure to the exposed opaque crosslinked polymer layer, thereby causing said peelable film layer to melt and flow.
2. The method of claim 1 , wherein the peelable film layer is selected from polyolefins; copolymers of olefin; vinyl acetate monomers; acrylic acid monomers; methacrylic acid monomers; acrylic esters; styrenes; polyamides; polyesters; polyurethanes; or combinations thereof.
3. The method of claim 1 , wherein the release coating layer is selected from silicone-containing polymers; acrylic polymers; polyvinylacetates; polystyrenes; polyvinyl alcohols; polyurethanes; polyvinylchlorides; ethylene-vinylacetate copolymers; acrylic copolymers; vinyl chloride-acrylics; vinylacetate acrylics, or mixtures thereof.
4. The method of claim 1 , wherein the release coating layer includes an additive selected from processing aids, release agents, pigments, deglossing agents, antifoam agents, rheology control agents, or mixtures thereof.
5. The method of claim 1 , wherein the substrate layer comprises a cellulosic nonwoven web.
6. The method of claim 1 , wherein the substrate layer comprises a polymeric film.
7. The heat transfer material of claim 1 , wherein the opaque crosslinked polymer layer includes a crosslinkable binder, a crosslinking agent and an opacifying pigment.
8. The method of claim 7 , wherein the crosslinking agent is a polyfunctional aziridine crosslinking agent.