| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester-based practically excellent marking film formed out of a polyester-based copolymer, improved in weathering resistance, transparency, and flexibility. SOLUTION: This polyester-based marking film is formed out of the polyester- based block copolymer composed of high-melting crystalline segments and low- melting soft polymer segments, and has a tensile modulus of 0.01-100 kg/mm<SP>2</SP>at 20°C, wherein the high-melting crystalline segments are mainly derived from a polyester composed of dibasic acid residues and ethylene glycol residues and having a melting point of≥200°C, and the low-melting soft polymer segments are mainly derived from a polyalkylene glycol having a melting point or a softening point of 80°C. COPYRIGHT: (C)2003,JPO |
