Packaging method based on a semi-crystalline thermoplastic polyester

A method for packaging products using heat-shrinkable film produced from the semicrystalline thermoplastic polyester, comprising the following steps:

• a) providing a semicrystalline thermoplastic polyester comprising at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A), at least one terephthalic acid unit (C), wherein the (A)/[(A)+(B)] molar ratio is at least 0.05 and at most 0.30, said polyester not containing any aliphatic non-cyclic diol units or comprising a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 5%, and the reduced solution viscosity (25° C.;
• phenol (50% m):
• ortho-dichlorobenzene (50% m);
• 5 g/l of polyester) of said polyester being greater than 50 ml/g;
• b) preparing a heat-shrinkable film from the semicrystalline thermoplastic polyester obtained in step a),
• c) covering a product by means of the heat-shrinkable film obtained in step b), and
• d) applying a heat treatment to said packaged product.