초록 ▼

An optical adhesive polyester film comprising (A) a polyester film layer containing an aromatic polyester and an ultraviolet absorber and (B) a coating formed on at least one surface of the polyester film (A). The coating (B) contains at least one polymer selected from the group consisting of a coat

An optical adhesive polyester film comprising (A) a polyester film layer containing an aromatic polyester and an ultraviolet absorber and (B) a coating formed on at least one surface of the polyester film (A). The coating (B) contains at least one polymer selected from the group consisting of a coating polyester having a glass transition point of 40 to 100째 C. and an acryl polymer having a glass transition point of 20 to 80째 C. in an amount of 50 to 95% by weight based on the coating. The optical adhesive polyester film is disposed on the front of a plasma display so as to block externally incoming ultraviolet light.

대표청구항 ▼

What is claimed is: 1. An optical adhesive polyester film which comprises: (A) a polyester film layer containing an aromatic polyester and an ultraviolet absorber, and (B) a coating formed on at least one surface of the polyester film, wherein the coating contains a coating polyester having a glass

What is claimed is: 1. An optical adhesive polyester film which comprises: (A) a polyester film layer containing an aromatic polyester and an ultraviolet absorber, and (B) a coating formed on at least one surface of the polyester film, wherein the coating contains a coating polyester having a glass transition point of 40 to 100째 C. and an intrinsic viscosity of 0.4 to lower than 0.7 in an amount of 60 to 90% by weight based on the coating, and which is disposed on the front of a plasma display for blocking external incoming ultraviolet light. 2. The film of claim 1, wherein the coating further contains a filler having a particle diameter of 0.02 to 0.2 μm in an amount of 0.1 to 20% by weight based on the coating. 3. The film of claim 1, wherein the coating contains a filler having a particle diameter of 0.02 to 0.2 μm in an amount of 1 to 20% by weight based on the coating. 4. The film of claim 3, wherein the coating polyester and the filler both have a refractive index of 1.50 to 1.60. 5. The film of claim 3 or 10, wherein the coating has a surface resistivity of not higher than 1횞1014 Ω/□. 6. The film of claim 1, wherein the coating contains a crosslinking agent in an amount of 1 to 40% by weight based on the coating, and a filler having a particle diameter of 0.02 to 0.2 μm in an amount of 0.1 to 20% by weight based on the coating. 7. The film of claim 6, wherein the crosslinking agent is at least one selected from the group consisting of an oxazoline-group-containing polymer, an urea resin, a melamine resin and an epoxy resin. 8. The film of claim 1, 3 or 6, wherein the ultraviolet absorber is at least one compound selected from the group consisting of a cyclic imino ester represented by the following formula (I): wherein X1 is a divalent aromatic residue whose two links are at positions 1 and 2; n is 1, 2 or 3; R1 is an n-valent hydrocarbon residue which may further contain a hetero atom, and R1 can be a direct bond when n=2, and a cyclic imino ester represented by the following formula (II): wherein A is a group represented by the following formula (II)-a or a group represented by the following formula (II)-b; R2 and R3 may be the same or different and are each a monovalent hydrocarbon residue; and X2 is a tetravalent aromatic residue which may further contain a hetero atom 9. The film of claim 1, wherein the polyester film layer (A) is a single layer. 10. The film of claim 1, wherein the polyester film layer (A) comprises at least three layers, i.e., two outermost layers and at least one intermediate layer. 11. The film of claim 10, wherein at least the intermediate layer contains an ultraviolet absorber. 12. The film of claim 1, 9 or 10, having a light transmittance at a wavelength of 370 nm of not higher than 3%, a haze of not higher than 3%, and a refractive index in a thickness direction of 1. 490 to 1.505. 13. The film of claim 12, having a heat shrinkage rate at 150째 C. of not higher than 2%. 14. The film of claim 1, wherein the polyester film layer (A) is a single layer, and the coating (B) has a center line surface roughness Ra of 1 to 10 nm. 15. The film of claim 1, wherein the polyester film layer (A) comprises at least three layers, and the coating (B) has a center line surface roughness Ra of 3 to 30 nm. 16. The film of claim 1, wherein the polyester film layer (A) comprises a polyethylene terephthalate or polyethylene-2,6-naphthalene dicarboxylate.