Flame-retardant polyester film and method for manufacturing the same

A method for manufacturing a flame-retardant polyester film, which is used to recycle and reuse a recycled polyester material, the method comprising:

• physically reproducing a part of the recycled polyester material and granulating the same to obtain a plurality of physically recycled polyester chips;
• chemically reproducing another part of the recycled polyester material and granulating the same to obtain a plurality of chemically recycled polyester chips, wherein the plurality of chemically recycled polyester chips further includes chemically recycled electrostatic pinning polyester chips, and wherein the chemically recycled electrostatic pinning polyester chips contain at least one kind of electrostatic pinning additives, and the electrostatic pinning additives are metal salts;
• and
• mixing the plurality of physically recycled polyester chips and the plurality of chemically recycled polyester chips, and melt extruding the same to form a polyester film;
• wherein, based on 100 parts by weight of a total content of the polyester chips, a content of the chemically recycled electrostatic pinning polyester chips of the plurality of chemically recycled polyester chips is between 5 and 35 parts by weight;
• wherein the method further comprises:
• in at least one of the physical reproducing step and the chemical reproducing step, adding a flame-retardant additive to the recycled polyester material, so that the polyester film that is finally formed includes the flame-retardant additive.