A resin blend for a melting process, comprising: a first resin comprising at least one selected from the group consisting of a styrene-based resin, a polyolefin-based resin, a thermoplastic elastomer, a polyoxyalkylene-based resin, a polyester-based resin, a polyvinyl chloride-based resin, a polycarbonate-based resin, a polyphenylene sulfide-based resin, a vinyl alcohol-based resin, and an acrylate-based resin; and a second resin having a polydispersity index of 1 to 2.5 measured using gel permeation chromatography which comprises an acrylic copolymer containing a silica particle and a polymer resin to which at least one organic functional group selected from the group consisting of an alkyl group having 2 to 20 carbon atoms; an alicyclic ring having 5 to 40 carbon atoms and an aromatic ring having 6 to 40 carbon atoms; an alkyl group having 1 to 20 carbon atoms, which is substituted with an perfluoroalkyl group having 1 to 20 carbon atoms; a hydroxy alkyl group having 1 to 20 carbon atoms; and an alkyl group having 1 to 20 carbon atoms and containing an epoxy functional group; is introduced, wherein the polymer resin comprises at least one selected from the group consisting of a (meth)acrylate-based resin, an epoxy-based resin, an oxetane-based resin, an isocyanate-based resin, a siliconbased resin, a fluorine-based resin and a copolymer thereof, wherein the second resin has a difference in surface energy from the first resin at 25 °C of 0.1 to 35 mN/m measured according to the Owens-Wendt-Rabel-Kaelble (OWRK) method, wherein the second resin has a difference in melt viscosity from the first resin of 1 to 2000 pa*s at a shear rate of 100 to 1000s -1 and a processing temperature of the resin blend measured using a capillary rheometer 1501 (Gottfert), wherein the second resin has a difference in solubility parameter from the first resin of 0.001 to 10.0 (J/cm 3) 1/2 at 25 °C measured using the Van Krevelen method, wherein the silica particle is a nano-silica particle of which an acrylic compound is treated on a surface, wherein the acrylic compound bound to the surface of the nano-silica particle comprises a compound represented by the following Chemical Formula 1: wherein R 1, R 2 and R 3 are identical or different each other, R 1, R 2 and R 3 are each independently an alkoxy group having 1 to 16 carbon atoms, and R 4 is an alkylene group having 1 to 16 carbon atoms. a first resin comprising at least one selected from the group consisting of a styrene-based resin, a polyolefin-based resin, a thermoplastic elastomer, a polyoxyalkylene-based resin, a polyester-based resin, a polyvinyl chloride-based resin, a polycarbonate-based resin, a polyphenylene sulfide-based resin, a vinyl alcohol-based resin, and an acrylate-based resin; and a second resin having a polydispersity index of 1 to 2.5 measured using gel permeation chromatography which comprises an acrylic copolymer containing a silica particle and a polymer resin to which at least one organic functional group selected from the group consisting of an alkyl group having 2 to 20 carbon atoms; an alicyclic ring having 5 to 40 carbon atoms and an aromatic ring having 6 to 40 carbon atoms; an alkyl group having 1 to 20 carbon atoms, which is substituted with an perfluoroalkyl group having 1 to 20 carbon atoms; a hydroxy alkyl group having 1 to 20 carbon atoms; and an alkyl group having 1 to 20 carbon atoms and containing an epoxy functional group; is introduced, wherein the polymer resin comprises at least one selected from the group consisting of a (meth)acrylate-based resin, an epoxy-based resin, an oxetane-based resin, an isocyanate-based resin, a siliconbased resin, a fluorine-based resin and a copolymer thereof, wherein the second resin has a difference in surface energy from the first resin at 25 °C of 0.1 to 35 mN/m measured according to the Owens-Wendt-Rabel-Kaelble (OWRK) method, wherein the second resin has a difference in melt viscosity from the first resin of 1 to 2000 pa*s at a shear rate of 100 to 1000s -1 and a processing temperature of the resin blend measured using a capillary rheometer 1501 (Gottfert), wherein the second resin has a difference in solubility parameter from the first resin of 0.001 to 10.0 (J/cm 3) 1/2 at 25 °C measured using the Van Krevelen method, wherein the silica particle is a nano-silica particle of which an acrylic compound is treated on a surface, wherein the acrylic compound bound to the surface of the nano-silica particle comprises a compound represented by the following Chemical Formula 1: wherein R 1, R 2 and R 3 are identical or different each other, R 1, R 2 and R 3 are each independently an alkoxy group having 1 to 16 carbon atoms, and R 4 is an alkylene group having 1 to 16 carbon atoms.