| 摘要 |
Biaxially oriented mono or multilayered polyester film comprises at least one substituted [1,3,5]triazine compounds as ultraviolet light stabilizer. Biaxially oriented mono or multilayered polyester film (A1) comprises at least one substituted [1,3,5]triazine compounds of formula (I) as ultraviolet light (UV) stabilizer. R 1H, 1-12C alkyl, aryl, S-1-12C alkyl, O-R 9 or O-1-5C alkylene-C(O)O-R 9; R 9aryl or 1-12C alkyl; R 3 and R 4phenyl (substituted by R 8 and at 4th position by R 7);and R 2, and R 5-R 8H, 1-12C alkyl, O-1-12C alkyl, aryl or O-aryl. The alkyl radicals with more than two C-atoms and alkylene radicals with more than one C-atom can be linear or branched. An independent claim is included for manufacturing the polyester film (A1) involving compressing and plastifying a polymer or a polymer mixture for a layer, or in case of multilayer films for the individual layers, in an extruder(s); forming the compressed and plastified polymer through a single or multilayer nozzle into a flat plastified film; pressing the flat plastified film through a slit die; drawing off the pressed film via a chill roll and at least one take-up rolls; biaxially stretching, heat setting and winding up the drawn-off film, where at least one layer of the film comprises the UV stabilizer (I). [Image]. |
