Laser printable dry-erase substrates and methods of their manufacture and use
View Patent ↗Laser printable, dry-erase substrates, along with their methods of formation and use, are provided. The laser printable, dry-erase substrate can include a base sheet defining a surface and a dry-erase coating on the surface of the base sheet. The dry-erase coating comprises a film-forming polymeric material (e.g., a polyacryl, a polymethacryl, a polyurethane-polyacryl mixture, a polyurethane-polymethacryl mixture, an urethane-acryl copolymer, or a mixture thereof) and a wetting agent (e.g., a nonionic surfactant that has a polyethylene oxide chain and an aromatic hydrocarbon lipophilic or hydrophobic group). The film-forming polymeric material melts and flows at a laser printing temperature so as to bond to toner ink.
1. A laser printable, dry-erase substrate, comprising:
a base sheet defining a surface;
a dry-erase coating on the surface of the base sheet, wherein the dry-erase coating comprises a film-forming polymeric material and a wetting agent, and wherein the film-forming polymeric material melts and flows at a laser printing temperature so as to bond to toner ink;
wherein the film-forming polymeric material in the dry-erase coating is substantially uncrosslinked.
2. The laser printable, dry-erase substrate as in claim 1 , wherein the film-forming polymeric material comprises a polyacryl, a polymethacryl, a polyurethane-polyacryl mixture, a polyurethane-polymethacryl mixture, an urethane-acryl copolymer, or a mixture thereof.
3. The laser printable, dry-erase substrate as in claim 1 , wherein the film-forming polymeric material comprises a polyurethane.
4. The laser printable, dry-erase substrate as in claim 3 , wherein the polyurethane is an aromatic polyether polyurethane, an aliphatic polyether polyurethane, an aromatic polyester polyurethane, an aliphatic polyester polyurethane, an aromatic polycaprolactam polyurethane, or an aliphatic polycaprolactam polyurethane.
5. The laser printable, dry-erase substrate as in claim 3 , wherein the polyurethane is an aliphatic polyether polyurethane.
6. The laser printable, dry-erase substrate as in claim 1 , wherein the wetting agent comprises a nonionic surfactant that has a polyethylene oxide chain and an aromatic hydrocarbon lipophilic or hydrophobic group.
7. The laser printable, dry-erase substrate as in claim 1 , wherein the dry-erase coating comprises about 90 wt % to about 99.5 wt % of the film-forming binder and about 0.5 wt % to about 5 wt % of the wetting agent, based on the dry weight of the dry-erase coating.
8. The laser printable, dry-erase substrate as in claim 1 , wherein the dry-erase coating is substantially transparent such that the underlying surface of the base sheet can be seen through the dry-erase coating.
9. The laser printable, dry-erase substrate as in claim 1 , wherein the dry-erase coating comprises a plurality of coating layers.
10. The laser printable, dry-erase substrate as in claim 9 , wherein the dry erase coating comprises a first coating layer on the surface of the base sheet, a second coating layer on the first coating layer, and a third coating layer on the second coating layer.
11. The laser printable, dry-erase substrate as in claim 1 , wherein the base sheet comprises a cellulosic nonwoven web.
12. The laser printable, dry-erase substrate as in claim 1 , wherein the base sheet comprises a film.
13. A method of forming a customized dry-erase substrate, the method comprising:
laser printing a toner ink onto the dry-erase coating of the laser printable, dry-erase substrate of claim 1 .