| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin pellet that contains a lubricant as an additive without being followed by the conventional problem even in the case of using a polyester resin as a resin. SOLUTION: The resin pellet comprises a core layer part and a sheath layer part covering the sides of the core layer part. The core layer part includes at least one kind of a polyester resin and an additive and the sheath part includes at least one kind of a polyester resin. The additive is at least one kind selected from the group consisting of a≥18C fatty acid, a≥18C fatty acid ester, a≥18C fatty acid amide, a≥18C ethylene bis fatty acid amide and the metal salt of the fatty acid. At least one of the core layer part and the sheath layer part comprises a low molecular-weight polyester resin having a number-average molecular weight of≥10,000 and≤20,000 as the polyester resin. COPYRIGHT: (C)2009,JPO&INPIT |
