摘要： 探讨了在水性免中涂（ＩＰＰ）喷涂工艺的条件下，不同的色漆和清漆层施工参数对铝粉定向排列的影响。 通过研究不同条件下的色漆层湿膜固体含量，抗清漆回溶能力和流变特性，初步总结了在水性 ＩＰＰ 喷涂工艺下，铝粉定向排列的机理。 发现延长金属色漆层第 １ 遍（ＢＣ２１）喷涂的常温闪干时间， 降低金属色漆层（ＢＣ２）施工黏度和提高金属色漆层第 ２ 遍（ＢＣ２２）旋杯喷涂转速能够有效提高铝粉定向排列；延长金属色漆层（ＢＣ２）预烘烤时间使色漆层抵抗清漆回溶能力下降，铝粉排列变差；ＢＣ２ ２ 的非静电喷涂和清漆闪干时间，对铝粉定向排列影响较小。

关键词: 铝粉定向, 闪干时间, 预烘烤, 水性金属漆, 施工黏度

Abstract: The effects of different application parameters of Base Coat 2(BC2)and Clear Coat (CC)on aluminum orientation at the process of IPP have been discussed. The mechanism is pre-liminarily summarized via the testing of wet film solid content, clear coat resistance and theology properties. The results show that the increase the flash off time of Base Coat 2 as the first spraying layer(BC2 1), the decrease of BC2 viscosity and the increase of rotating spray speed of Base Coat 2 as the second spraying layer (BC2.2)can give positive influence on aluminum orientation. In ad-dition, the elongation of the pre-baking time of BC can cause a negatve effect on the clear coat re- sistance and aluminum orientation of Base Coat The non-electrostatic spraying of BC2. 2 and flash off time of CC give a slight effect on the aluminum orientation.

Key words: aluminum orientation;lash off time, pre-baking: waterbome metallicpaint, application viscosity