水性透明涂料涂饰单板光变色的研究  

Study on the Photochroma of Coated Veneer by Water-Borne Clear Prints

作　　者：郭洪武[1] 王金林[2] 李春生[2] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083 [2]中国林业科学研究院木材工业研究所,北京100091

出　　处：《林业科学》2009年第5期121-125,共5页Scientia Silvae Sinicae

基　　金：国家863计划课题"木基复合装饰材料制造技术"(2002AA245101)

摘　　要：以涂饰与未涂饰的杨木和樟子松单板为试材,利用氙光衰减仪进行光辐射试验,分析其光变色规律及影响因子,并进行耐光性能评价。结果表明:涂饰与未涂饰的单板受光辐射易发生变色,主要表现为明度指数L*降低,色度指数a*和b*上升,其中涂饰与未涂饰的樟子松单板的色度指数b*变化明显;涂饰水性双组分聚氨酯清漆单板的总色差值明显大于涂饰水性丙烯酸清漆单板,涂饰樟子松单板的总色差值大于涂饰的杨木单板;涂料种类和单板树种对涂饰单板的光变色均有一定的影响,但涂料种类影响较明显;涂饰与未涂饰水性双组分聚氨酯清漆的单板总色差值差异不明显,涂饰水性丙烯酸清漆单板的总色差值小于未涂饰的单板。The coated and uncoated veneers from poplar and Mongolian Scotch Pine was lighted by Xenon light attenuation tester. The photochroma machinsm and influencing fators were analyzed and the lightfastness performance was evaluated. The coated and uncoated veneers were easy to change color after lighted, with brightness index L^＊ decreasing while chroma indexes a^＊ and b ^＊ increasing. The chroma index b ^＊ of Mongolian Scotch Pine veneer had a more clear change. The coated veneers by water-borne two-component polyurethane varnish was obvisouly greater than these by water-borne acrylic varnish in the total chromatism value. The coated veneers from Mongolian Scotch Pine was more than these from poplar in the total chromatism value. The print had a more clear influence on the chromatism than veneer species. The coated and uncoated veneers by water- borne two-component polyurethane varnish had no clear influence on the total chromatism value. The coated veneers by waterborne acrylic varnish was smaller than the uncoated veneers in the total ehromatism value.

关 键 词：涂料涂饰 杨木单板 樟子松单板 光变色 

分 类 号：S781.6[农业科学—木材科学与技术]