Adhesive optical film, manufacturing method for the same and image display device using the same

A method for producing a pressure-sensitive adhesive optical film comprising an optical film and a pressure-sensitive adhesive layer provided on the optical film, the method comprising the steps of:

• (1B) applying a pressure-sensitive adhesive coating liquid with a viscosity Y (P) to a release film to form a coating with a thickness X (μm);
• (2B) drying the applied pressure-sensitive adhesive coating liquid to form a pressure-sensitive adhesive layer;
• and
• (3) bonding the pressure-sensitive adhesive layer, which is formed on the release film, to the optical film,
• wherein the viscosity Y of the pressure-sensitive adhesive coating liquid and the thickness X of the coating satisfy the relation 0.8X−Y≦68,
• wherein the pressure-sensitive adhesive coating liquid has a thickness X (μm) of 60.8 to 250 μm,
• wherein the pressure-sensitive adhesive coating liquid has a viscosity Y (P) of 20 to 160 P,
• wherein the pressure-sensitive adhesive layer has a thickness (μm) standard deviation of 0.12 μm or less, and
• wherein the pressure-sensitive adhesive coating liquid is an organic solvent-based pressure-sensitive adhesive containing a (meth)acryl-based polymer having a weight average molecular weight in the range of 1,400,000 to 3,000,000.

A method for producing a pressure-sensitive adhesive optical film comprising at least two optical films and at least two pressure-sensitive adhesive layers alternately laminated, the method comprising the steps of:

• applying a pressure-sensitive adhesive coating liquid with a viscosity Y (P) to a first one of said at least two optical films to form a first coating with a first thickness X (μm);
• and
• drying the applied pressure-sensitive adhesive coating liquid to form a first one of said at least two pressure-sensitive adhesive layers,
• applying the pressure-sensitive adhesive coating liquid with the viscosity Y (P) to a second one of said at least two optical films to form a second coating with a second thickness X (μm);
• and
• drying the applied pressure-sensitive adhesive coating liquid to form a second one of said at least two pressure-sensitive adhesive layers,
• wherein the viscosity Y of the pressure-sensitive adhesive coating liquid and the first thickness X of the coating satisfy the relation 0.8X−Y≦68,
• wherein the viscosity Y of the pressure-sensitive adhesive coating liquid and the second thickness X of the coating satisfy the relation 0.8X−Y≦68,
• wherein the pressure-sensitive adhesive coating liquid has a thickness X (μm) of 60.8 to 250 μm,
• wherein the pressure-sensitive adhesive coating liquid has a viscosity Y (P) of 20 to 160 P,
• wherein at least one of the pressure-sensitive adhesive layers has a thickness (μm) standard deviation of 0.12 μm or less, and
• wherein the pressure-sensitive adhesive coating liquid is an organic solvent-based pressure-sensitive adhesive containing a (meth)acryl-based polymer having a weight average molecular weight in the range of 1,400,000 to 3,000,000.

A method for producing a pressure-sensitive adhesive optical film comprising at least two optical films and at least two pressure-sensitive adhesive layers alternately laminated, the method comprising the steps of:

• applying a pressure-sensitive adhesive coating liquid with a viscosity Y (P) to a release film to form a coating with a thickness X (μm);
• drying the applied pressure-sensitive adhesive coating liquid to form a pressure-sensitive adhesive layer;
• and
• bonding the pressure-sensitive adhesive layer, which is formed on the release film, to at least one of the at least two optical films,
• wherein the viscosity Y of the pressure-sensitive adhesive coating liquid and the thickness X of the coating satisfy the relation 0.8X−Y≦68,
• wherein the pressure-sensitive adhesive coating liquid has a thickness X (μm) of 60.8 to 250 μm,
• wherein the pressure-sensitive adhesive coating liquid has a viscosity Y (P) of 20 to 160 P,
• wherein at least one of the pressure-sensitive adhesive layer has a thickness (μm) standard deviation of 0.12 μm or less, and
• wherein the pressure-sensitive adhesive coating liquid is an organic solvent-based pressure-sensitive adhesive containing a (meth)acryl-based polymer having a weight average molecular weight in the range of 1,400,000 to 3,000,000.