A method for preventing the emission of fluorescence from polyalkylenenaphthalene-2,6-dicarboxylate, comprising mixing polyalkylenenaphthalene-2,6-dicarboxylate and at least one compound selected from cyclic imino esters and quinoxalines. The above cyclic imino esters and quinoxalines have an absorption intensity E, defined by the following expression:E 1cm1%= A/c.d
wherein A is an absorbance measured in 1,1,2,2-tetrachloroethane at a concentration c (g/100 ml) and an optical path d (cm),
of more than 200 at an ultraviolet wavelength range of 340 to 400 nm. And when a coating layer containing at least one ultraviolet absorber is formed on the surface of a molded article made of the above fluorescence-emission preventive mixture, a synergistic suppression of the emission of fluorescence can be obtained.
一种防止聚亚烷基
萘-2,6-二
甲酸酯发射荧光的方法,包括将聚亚烷基
萘-2,6-二
甲酸酯与至少一种选自环
亚胺酯和
喹喔啉的化合物混合。上述环状亚
氨基酯和
喹喔啉类化合物的吸收强度 E 由以下表达式定义:E 1cm1%= A/c.d
其中 A 是在 1,1,2,2-四
氯乙烷中测得的吸光度,浓度为 c(克/100 毫升),光程为 d(厘米)、
大于 200,紫外线波长范围为 340 至 400 纳米。当在由上述防止荧光发射混合物制成的成型品表面形成含有至少一种
紫外线吸收剂的涂层时,可获得协同抑制荧光发射的效果。