| 摘要 |
This invention describes a polymer composition having reduced torque during processing comprising poly(ethylene terephthalate) (PET) and an internal additive, where the internal additive is a polyglycerol fatty acid ester having a degree of esterification of at least 70% and where the concentration of the internal additive is below 5 wt%. This invention further describes a use of said composition for packaging materials and a use of an internal additive in the processing of the polymer composition as a lubricant and/or an anti-blocker during processing of the polymer, where said internal additive is a polyglycerol fatty acid ester having a degree of esterification of at least 70% and 2-10 glycerol repeating units. |
