Tuft and filament binding in unfinished carpet

A process for tuft and filament binding to an unfinished carpet to provide a coated carpet, which comprises

• applying a coating composition which comprises from 50% to 100% by weight of one or more substantially amorphous poly-α-olefins as a melt to the backside of the unfinished carpet in a coating weight amount of from 20 to 1,500 g/m2 to bind the tuft and filament to the unfinished carpet,
• wherein the melt viscosity of the coating composition at 190° C. is from 200 mPas to 20,000 mPas, wherein the substantially amorphous poly-α-olefin comprises at least one selected from the group consisting of atactic poly-1-butene, propene-ethene copolymer, propene-1-butene copolymer, 1-butene-ethene copolymer and propene-1-butene-ethene terpolymer, and wherein the substantially amorphous poly-α-olefin has an enthalpy of fusion of at least 2 J/g and not more than 100 J/g.