Adhesive film and process for producing the same

A process for producing an adhesive film, comprising the steps of:

• forming an adhesive layer on at least one surface of a polyester film to prepare a coated film;
• and
• drawing the coated film in at least one direction thereof,
• wherein the polyester film consists of polyester, and
• wherein the adhesive layer is formed by applying a coating solution consisting of:
• a (meth)acrylic resin containing a (meth)acrylate unit with an alkyl group having not less than 4 carbon atoms at an ester end thereof, wherein the (meth)acrylic resin has a glass transition point of not higher than −30° C.,
• an antistatic agent, and
• a solvent.

An adhesive film comprising

• a polyester film and
• an adhesive layer formed on at least one surface of the polyester film and having a thickness of 1 to 700 nm,
• in which the polyester film consists of a polyester, and at least one additive selected from the group consisting of particles selected from the group consisting of silica, calcium carbonate, magnesium carbonate, barium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, kaolin, aluminum oxide, zirconium oxide, and titanium oxide, an ultraviolet absorber, an antioxidant, an antistatic agent, a thermal stabilizer, and a lubricant,
• in which the adhesive layer is formed by applying a coating solution consisting of:
• a (meth)acrylic resin containing a (meth)acrylate unit with an alkyl group having not less than 4 carbon atoms at an ester end thereof, wherein the (meth)acrylic resin has a glass transition point of not higher than −30° C.,
• an antistatic agent, and
• a solvent.

An adhesive film comprising

• a polyester film and
• an adhesive layer formed on at least one surface of the polyester film and having a thickness of 1 to 700 nm,
• in which the polyester film consists of a polyester, and
• in which the adhesive layer is formed by applying a coating solution consisting of:
• a (meth)acrylic resin containing a (meth)acrylate unit with an alkyl group having not less than 4 carbon atoms at an ester end thereof, wherein the (meth)acrylic resin has a glass transition point of not higher than −30° C.,
• an antistatic agent,
• at least one additive selected from the group consisting of particles, a crosslinking agent, a polyol compound, a polyether compound, a defoaming agent, a coatability improver, a thickening agent, an organic lubricant, an ultraviolet absorber, an antioxidant, a foaming agent, a dye, and a pigment, and
• a solvent,
• wherein the adhesive layer has an adhesion strength to a polymethyl methacrylate plate of 1 to 500 mN/cm.

An adhesive film comprising

• a polyester film and
• an adhesive layer formed on at least one surface of the polyester film and having a thickness of 1 to 700 nm,
• in which the polyester film consists of a polyester, and at least one additive selected from the group consisting of particles selected from the group consisting of silica, calcium carbonate, magnesium carbonate, barium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, kaolin, aluminum oxide, zirconium oxide, and titanium oxide, an ultraviolet absorber, an antioxidant, an antistatic agent, a thermal stabilizer, and a lubricant,
• in which the adhesive layer is formed by applying a coating solution consisting of:
• a (meth)acrylic resin containing a (meth)acrylate unit with an alkyl group having not less than 4 carbon atoms at an ester end thereof, wherein the (meth)acrylic resin has a glass transition point of not higher than −30°,
• an antistatic agent,
• at least one additive selected from the group consisting of particles, a crosslinking agent, a polyol compound, a polyether compound, a defoaming agent, a coatability improver, a thickening agent, an organic lubricant, an ultraviolet absorber, an antioxidant, a foaming agent, a dye, and a pigment, and
• a solvent,
• wherein the adhesive layer has an adhesion strength to a polymethyl methacrylate plate of 1 to 500 mN/cm.