Abstract: The influence of PMT and coatings film thickness on surface gloss and color difference of PVDF precoated sheets has been analyzed through the tests in this article. The test results showed that the coatings film thickness had much effect on the gloss than PMT. As a whole, the gloss increased as the coat-ings film thickness became higher and PMT lower. Less gloss changes caused by the coatings film thickness for the bright color coatings than that of dark coatings. PMT and the coatings film thickness showed greater effects on the value L than the value a and b.

Key words: PVDF coatings gloss, color difference, peak metal temperature (PMT), coatings film thickness

摘要： 分析了烘烤温度和涂层厚度对氟碳彩板表面光泽与色差的影响。试验结果表明：ＰＭＴ的影响较小，涂层厚度的影响较大。随着 ＰＭＴ降低和面漆涂层厚度的增加，氟碳彩板表面光泽总体上呈现上升的趋势；对于浅色系的氟碳彩板，其表面光泽随着面涂层厚度增加而发生变化的程度要大于深色系发生变化的程度；ＰＭＴ和面涂层厚度对氟碳彩板表面色差 Ｌ值的影响较大，对色差 ａ和 ｂ值的影响较小。

关键词: 氟碳涂料, 光泽, 色差, 烘烤温度, 涂层厚度