Double-layer touch screen and method for making the same

A double-layer touch screen, comprising:

• a transparent cover glass;
• a first transparent embossed adhesive layer laminated on one surface of the transparent cover glass and defining a grid-like first groove thereon, wherein the refractive index of the transparent cover glass is greater than that of the first transparent embossed adhesive layer;
• a first conductive layer embedded in the first transparent embossed adhesive layer and including a plurality of first conductive strips extending along a first direction, wherein the first conductive strips each is formed by intercrossing conductive wires that are formed by curing or solidifying a conductive material filled in the first groove;
• a second transparent embossed adhesive layer laminated on the first transparent embossed adhesive layer and defining a grid-like second groove thereon, wherein the refractive index of the first transparent embossed adhesive layer is not less than that of the second transparent embossed adhesive layer;
• a second conductive layer embedded in the second transparent embossed adhesive layer and including a plurality of second conductive strips extending along a second direction, wherein the second conductive strips each is formed by intercrossing conductive wires that are formed by curing or solidifying a conductive material filled in the second groove;
• and
• a transmission reinforcement layer covering on the second transparent embossed adhesive layer, wherein the refractive index of the second transparent embossed adhesive layer is greater than that of the transmission reinforcement layer, and the refractive index of the transmission reinforcement layer is greater than that of air;
• wherein the first direction is not parallel to the second direction, and the first conductive strips and the second conductive strips are spaced apart and insulated from each other in a thickness direction of the transparent cover glass;
• wherein material of the transmission reinforcement layer is formed by an ultraviolet curable resin, and the transmission reinforcement layer has a thickness of 0.5 μm-5 μm;
• wherein the ultraviolet curable resin comprises the following components based on 100 parts by mass:
• 60 parts to 80 parts of an organic monomer, 10 parts to 30 parts of a diluent, 0.01 parts to 1 part of a photoinitiator, 0.2 parts to 2 parts of a stabilizer, 0.2 parts to 2 parts of a leveling agent, 0.3 parts to 2 parts of a defoaming agent and 0.5 parts to 3 parts of a plasticizer;
• wherein the organic monomer is at least one selected from the group consisting of acrylic ester, epoxy resin and vinyl ether;
• the diluent is at least one selected from the group consisting of tripropylene glycol diacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, dipentaerythritol hexaacrylate, 1,6-hexanediol methoxy monoacrylate, and ethoxylated neopentyl glycol methoxy monoacrylate;
• the photoinitiator is at least one selected from the group consisting of aromatic diazonium salt, aromatic sulfonium salt, aromatic iodonium salt and ferrocenium salt;
• the stabilizer is at least one selected from the group consisting of hydroquinone, p-methoxyphenol, p-benzoquinone, 2,6-di-t-butyl methyl phenol, phenothiazine, and anthraquinone;
• the leveling agent is at least one selected from the group consisting of polyacrylate, cellulose acetate butyrate, nitrocellulose and polyvinyl butyral;
• the defoaming agent is at least one selected from the group consisting of phosphate defoaming agent, fatty acid ester defoaming agent and silicone defoaming agent;
• and
• the plasticizer is at least one selected from the group consisting of phthalic acid ester, diisononyl phthalate, diisodecyl phthalate and trimellitic acid ester.