Resin blend

A pellet comprising:

• a core containing a first resin, and
• a shell containing a second resin having a hydrophobic functional group represented by the following Chemical Formula 1 in a side chain and having a surface energy difference of 5 to 20 mN/m from the first resin at 25° C. and a molecular weight distribution of 1 to 3.0:
• wherein, R1 is an alkyl group having 1 to 16 carbon atoms, R2 is a single bond or an alkylene group having 1 to 16 carbon atoms, Ra to Rf are each independently an alkyl group having 1 to 16 carbon atoms, and n is a number from 1 to 100,
• wherein, the first resin is an ABS resin and the second resin is a (meth)acrylate-based resin, and the ABS resin and the (meth)acrylate-based resin have a melt viscosity difference of 300 to 500 pa*s at a shear rate of 100 to 1000 s−1 and at a processing temperature of the resin blend of 210° C. to 240° C.,
• wherein the second resin in an amount of 0.1 parts by weight to 50 parts by weight based on the 100 parts by weight of the first resin, and
• wherein the second resin is layer-separated from the first resin.