Polarizing plate comprising polyethylene terephthalate protective film, method for manufacturing same, and image display device and liquid-crystal display device comprising same
First Claim
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1. A polarizing plate comprising:
- a water-based adhesive layer, a primer layer including an acryl-based unit, and a polyethylene terephthalate protection film sequentially provided on at least one surface of a polarizer,wherein the water-based adhesive layer is applied to the at least one surface of the polarizer, and the primer layer is in contact with the polyethylene terephthalate protection film and the water-based adhesive layer,wherein the polarizer is a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene vinyl acetate copolymer-partially saponified film, where molecular chains containing an iodine-based compound or a dichromatic polarizing material are aligned in a predetermined direction,wherein the water-based adhesive layer is formed by using a water-based adhesive including a polyvinyl alcohol-based resin, an amine-based metal compound, and a pH adjuster,wherein the water-based adhesive has a pH of 4 to 9, and comprises 1 to 50 parts by weight of the amine-based metal compound and 0.0001 to 5 parts by weight of the pH adjuster, based on 100 parts by weight of the polyvinyl alcohol-based resin, andwherein the pH adjuster comprises 0.001 to 10 parts by weight of epoxy (meth)acrylate, 10 to 50 parts by weight of alcohol, and 30 to 80 parts by weight of acid, based on 100 parts by weight of the pH adjuster.
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Abstract
The present invention relates to a polarizing plate including a water-based adhesive layer, a primer layer, and a polyethylene terephthalate protection film sequentially provided on at least one surface of a polarizer, in which the water-based adhesive layer is formed by using a water-based adhesive including a polyvinyl alcohol-based resin, an amine-based metal compound, and a pH adjuster, and the pH adjuster includes epoxy (meth)acrylate, alcohol, and acid, and a method for manufacturing the same.
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Citations
17 Claims
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1. A polarizing plate comprising:
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a water-based adhesive layer, a primer layer including an acryl-based unit, and a polyethylene terephthalate protection film sequentially provided on at least one surface of a polarizer, wherein the water-based adhesive layer is applied to the at least one surface of the polarizer, and the primer layer is in contact with the polyethylene terephthalate protection film and the water-based adhesive layer, wherein the polarizer is a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene vinyl acetate copolymer-partially saponified film, where molecular chains containing an iodine-based compound or a dichromatic polarizing material are aligned in a predetermined direction, wherein the water-based adhesive layer is formed by using a water-based adhesive including a polyvinyl alcohol-based resin, an amine-based metal compound, and a pH adjuster, wherein the water-based adhesive has a pH of 4 to 9, and comprises 1 to 50 parts by weight of the amine-based metal compound and 0.0001 to 5 parts by weight of the pH adjuster, based on 100 parts by weight of the polyvinyl alcohol-based resin, and wherein the pH adjuster comprises 0.001 to 10 parts by weight of epoxy (meth)acrylate, 10 to 50 parts by weight of alcohol, and 30 to 80 parts by weight of acid, based on 100 parts by weight of the pH adjuster. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 17)
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12. A method for manufacturing a polarizing plate, the method comprising:
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forming a primer layer including an acryl-based unit, and a water-based adhesive layer between a polarizer and a polyethylene terephthalate protection film; and attaching the polyethylene terephthalate protection film onto at least one surface of the polarizer via the water-based adhesive layer and the primer layer, wherein the water-based adhesive layer is applied to the at least one surface of the polarizer, and the primer layer is in contact with the polyethylene terephthalate protection film and the water-based adhesive layer, wherein the polarizer is a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene vinyl acetate copolymer-partially saponified film, where molecular chains containing an iodine-based compound or a dichromatic polarizing material are aligned in a predetermined direction, wherein the water-based adhesive layer is formed by using a water-based adhesive including;
a polyvinyl alcohol-based resin;
an amine-based metal compound; and
a pH adjuster,wherein the water-based adhesive has a pH of 4 to 9, and comprises 1 to 50 parts by weight of the amine-based metal compound and 0.0001 to 5 parts by weight of the pH adjuster, based on 100 parts by weight of the polyvinyl alcohol-based resin, and wherein the pH adjuster comprises 0.001 to 10 parts by weight of epoxy (meth)acrylate, 10 to 50 parts by weight of alcohol, and 30 to 80 parts by weight of acid, based on 100 parts by weight of the pH adjuster. - View Dependent Claims (13, 14)
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Specification