Polyester packaging films producing a peelable seal

A heat sealable packaging film producing a peelable seal formed from a blend, the blend comprising:

• (A) about 99 to about 75 weight percent of a copolyester comprising:
• i. diacid residues of at least 50 mole percent terephthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, or mixtures thereof;
• and
• ii. diol residues of about 90 to about 35 mole percent ethylene glycol and about 10 to about 65 mole percent of at least one of diethylene glycol or 1,4-cyclohexanedimethanol, the diacid residues and the diol residues each based on 100 mole percent;
• (B) about 1 to about 25 weight percent of a maleic anhydride-containing polymer selected from (i) a copolymer comprising about 80 to about 99 weight percent ethylene and about 1 to about 20 weight percent maleic anhydride, (ii) a grafted copolymer comprising about 1 to about 20 weight percent maleic anhydride and about 80 to about 99 weight percent olefin polymers, or (iii) a terpolymer comprising about 50 to about 98 weight percent ethylene, about 1 to about 20 weight percent maleic anhydride, and about 1 to about 30 weight percent alkyl acrylate having the formula 4
• wherein R1 is alkyl of up to about 8 carbon atoms and R2 is hydrogen, methyl or ethyl;
• wherein copolyester component A is based on 100 mole percent diacid residues and 100 mole percent diol residues and the weight percentages are based on the total weight of components A and B.