| 摘要 |
The invention relates to blown films and methods of making blown films using a melt-strength enhanced polyester composition. The composition has a zero-shear viscosity and a degree of shear thinning that are comparable to PVC5S melt rheology. The polyester composition has a branching agent and/or a fluoropolymer processing additive and an inherent viscosity of at least 0,80 dl/g. The diacid component of the polyester composition comprises 97 to 100 mole percent of residues of terephthalic acid, naphthalenedicarboxylic acid, isophthalic acid or mixtures thereof. The glycol component of the polyester composition comprises 97 to 100 mole percent of residues of ethylene glycol, 1,4-cyclohexanedimethanol, diethylene glycol, neopentyl glycol or mixtures thereof. |
