Methods for providing electrically-conductive articles
View Patent ↗A method is used to provide an electrically-conductive article. This method includes: forming an electrically-conductive pattern on first supporting side of a transparent substrate that also comprises an opposing second supporting side; and forming a dry outermost polymeric coating over at least part but not all of the electrically-conductive pattern, the dry polymeric coating having a dry thickness of less than 5 μm, an integrated transmittance of at least 80%, and comprising a non-crosslinked thermoplastic polymer having a glass transition temperature (T g ) that is equal to or greater than 65° C.
1. A method for providing an electrically-conductive article, the method comprising:
forming an electrically-conductive metal pattern on first supporting side of a transparent substrate that also comprises an opposing second supporting side, which electrically-conductive metal pattern comprises at least:
an electrically-conductive metal grid, and
an electrically-conductive metal connector that is connected to the electrically-conductive metal grid; and
forming a dry outermost polymeric coating over 100% of the electrically-conductive metal grid, but over less than 100% of the electrically-conductive metal connector, the dry polymeric coating having a dry thickness of less than 5 μm, an integrated transmittance of at least 90%, and comprising a non-crosslinked non-aromatic thermoplastic polymer having a glass transition temperature (T g ) that is equal to or greater than 65° C.,
wherein the non-crosslinked non-aromatic thermoplastic polymer is one or more of the following:
poly(methyl methacrylate-co-n-butyl methacrylate);
poly(methyl methacrylate-co-n-butyl methacrylate-co-methacrylic acid);
poly(methyl methacrylate-co-hexyl methacrylate);
poly(methyl methacrylate-co-octyl methacrylate);
poly(methyl methacrylate-co-lauryl methacrylate);
poly(ethyl methacrylate-co-n-butyl methacrylate-co-methacrylic acid); and
poly(ethyl methacrylate-co-methacrylic acid),
wherein the mol % of the recurring units derived from methyl methacrylate or ethyl methacrylate in the non-crosslinked non-aromatic thermoplastic polymer is from 75 mol % to 95 mol %, based on the total recurring units in the non-crosslinked thermoplastic non-aromatic polymer.
2. The method of claim 1 further comprising:
forming an electrically-conductive metal pattern on the opposing second supporting side of the transparent substrate, which electrically-conductive metal pattern comprises at least:
an electrically-conductive metal grid, and
an electrically-conductive metal connector that is connected to the electrically-conductive metal grid; and
forming a dry outermost polymeric coating over 100% of the electrically-conductive metal grid, but over less than 100% of the electrically-conductive metal connector on the opposing second supporting side of the transparent substrate, this dry polymeric coating having a dry thickness of less than 5 μm, an integrated transmittance of at least 90%, and comprising the non-crosslinked non-aromatic thermoplastic polymer.
3. The method of claim 1 , comprising forming the outermost polymeric coating on the first supporting side using a flexographic printing member.
4. The method of claim 1 , wherein the transparent substrate is a continuous transparent polymeric web.
5. The method of claim 1 comprising forming the electrically-conductive metal pattern on a first portion of the continuous transparent polymeric web.
6. The method of claim 1 , comprising:
forming multiple electrically-conductive metal patterns on respective multiple portions on the first supporting side of the continuous transparent polymeric web, each electrically-conductive metal pattern comprising at least:
an electrically-conductive metal grid, and
an electrically-conductive metal connector that is connected to the electrically-conductive metal grid; and
forming a dry outermost polymeric coating on 100% of the electrically-conductive metal grid, but over less than 100% of the electrically-conductive metal connector of each of the electrically-conductive metal patterns in the multiple portions, the dry outermost polymeric coating disposed on each of the multiple electrically-conductive metal patterns having a dry thickness of less than 5 μm, an integrated transmittance of at least 90%, and comprising the non-crosslinked non-aromatic thermoplastic polymer.
7. The method of claim 6 comprising applying the dry outermost polymeric coating on each of the multiple electrically-conductive metal patterns in each of the multiple portions using the same or different flexographic printing member.
8. The method of claim 1 , wherein the dry outermost polymeric coating has a dry thickness of less than 3 μm.
9. The method of claim 1 , wherein the electrically-conductive metal pattern disposed on at least the first supporting side of the transparent substrate, comprises electrically-conductive metal wires composed of at least silver, copper, palladium, or platinum.
10. The method of claim 2 , wherein the transparent substrate is a continuous transparent polymeric web.
11. The method of claim 2 , wherein the electrically-conductive metal pattern disposed on both of the first supporting side and the opposing second supporting side on the transparent substrate, comprises electrically-conductive metal wires composed of at least silver, copper, palladium, or platinum.
12. The method of claim 1 , wherein the electrically-conductive metal grid is in a touch region of the electrically-conductive metal pattern, and the electrically-conductive metal connector is outside the touch region of the electrically-conductive metal pattern.
13. The method of claim 1 , wherein the electrically-conductive metal grid has an average dry width of at least 0.2 μm and up to and including 100 μm.
14. A method for providing an electrically-conductive article, the method comprising:
forming an electrically-conductive metal pattern on a first supporting side of a transparent substrate that also comprises an opposing second supporting side, which electrically-conductive metal pattern comprises at least:
an electrically-conductive metal grid, and
an electrically-conductive metal connector that is connected to the electrically-conductive metal grid; and
forming a dry outermost polymeric coating over 100% of the electrically-conductive metal grid, but over less than 100% of the electrically-conductive metal connector, the dry polymeric coating having a dry thickness of less than 5 μm, an integrated transmittance of at least 90%, and comprising a non-crosslinked non-aromatic thermoplastic polymer having a glass transition temperature (T g ) that is equal to or greater than 65° C.,
wherein the non-crosslinked non-aromatic thermoplastic polymer is one or more of the following:
poly(methyl methacrylate-co-n-butyl methacrylate);
poly(methyl methacrylate-co-n-butyl methacrylate-co-methacrylic acid);
poly(methyl methacrylate-co-hexyl methacrylate);
poly(methyl methacrylate-co-octyl methacrylate);
poly(methyl methacrylate-co-lauryl methacrylate);
poly(ethyl methacrylate-co-n-butyl methacrylate-co-methacrylic acid); and
poly(ethyl methacrylate-co-methacrylic acid),
wherein the mol % of the recurring units derived from methyl methacrylate or ethyl methacrylate in the non-crosslinked non-aromatic thermoplastic polymer is from 75 mol % to 95 mol %, based on the total recurring units in the non-crosslinked thermoplastic non-aromatic polymer.