Recyclable PET film

A process for recycling a polyester film comprising the steps of:

• comminuting a multilayer, coextruded polyester film,
• contacting the comminuted polyester film with an aqueous alkali metal hydroxide-containing solution to dissolve the at least one outer layer (A),
• separating the comminuted polyester film, wherein the comminuted polyester film no longer comprises an outer layer (A), and
• drying the comminuted polyester film, wherein the coextruded polyester film comprises at least one outer layer (A) and a base layer (B), and
• the at least one outer layer (A) contains at least 60 wt % of a polyester or a copolyester consisting of units derived from aliphatic dicarboxylic acids and diols, wherein the units derived from dicarboxylic acids are selected from one or more dicarboxylic acids from the group consisting of succinic acid, adipic acid, suberic acid, azelaic acid and sebacic acid, and the units derived from diols are selected from one or more diols from the group consisting of ethylene glycol, 1,3-propanediol, 1,4-butanediol and neopentyl glycol.