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内蒙古彩涂板厂家测定彩钢板涂料细度的方法

返回列表 来源: 发布日期: 2020.09.25

内蒙古彩涂板厂家测定彩钢板涂料细度的方法

内蒙古彩涂板厂家细度是对涂料中颜料、颜料等颗粒的大小和分散均匀性的测量,单位为微米(桶m)。对卷材涂料的背漆和面漆的细度要求很高,内蒙古彩涂板厂家一般控制在15~25桶m,而底漆的细度可较粗,一般控制在20~40 Pera。一般来说,细度小,能使涂层光滑均匀,美化外观和装饰性能,具有良好的机械性能。细度主要由刮板细度仪测定,范围为50p,m(见图)。涂料细度的测定采用国家标准GB 内蒙古彩涂板厂家1724-89(79)。刮刀细度仪的结构是由工具合金钢制成的抛光平板。板上有凹槽,沟槽边缘有刻度线,分为0-501山m、0-100t.lm、0-1501llm等多种规格,还有刮板。两边都磨光了。测量时应注意以下几点:
(1) 内蒙古彩涂板厂家可根据不同涂层类型选择不同量程的细度计,可先用量程大的细度计进行粗测。
(2) 在试上端,滴下约1-29个油漆样品,不要太多或太少。
(3) 用双手握住刮刀,使刮刀垂直接触磨光板表面,以适当的速度(一般为3s)从槽深部向浅部拉动,使试样充满凹槽,板上不留残余物。(4) 在阳光下(15秒),读数不应超过5秒。~30。角度以三个以上颗粒处的读数为准

Fineness is the measurement of the size and dispersion uniformity of particles such as pigment and body pigment in the coating, and the unit is expressed in micrometer (bucket m). The requirements for the fineness of the back paint and the top coat of the coil coating are very high, which are generally controlled within 15 ~ 25 bucket m, while the fineness of the primer can be coarser, generally controlled at 20 ~ 40 Pera. Generally speaking, the fineness is small, which can make the coating smooth and even, beautify the appearance and decoration performance, and have good mechanical properties. The fineness is mainly determined by the scraper fineness meter with a range of 50p, m (see Figure). The national standard GB 1724-89 (79) is used for the determination of coating fineness. The structure of the scraper fineness meter is a polished flat plate made of tool alloy steel. There is a groove on the plate, and there is a scale mark at the edge of the groove, which is divided into several specifications, such as 0-501 mountain m, 0-100 t.lm, 0-1501 LLM, etc. There is also a scraper. Both edges are polished. The following points should be paid attention to when measuring:

(1) The fineness meter with different range can be selected according to different coating types, and the fineness meter with large range can be used for rough measurement first.
(2) On the upper end of the test plate, drop about 1-29 paint samples, not too much or too little.
(3) Hold the scraper with both hands, make the scraper contact the surface of the polished plate vertically, and pull it from the deep part of the groove to the shallow part at an appropriate speed (generally taking 3 s), so that the sample is filled with the groove and no residual material is left on the plate. (4) Under the sunlight (15 seconds), the reading should not exceed 5 seconds. ~30。 The angle is based on the reading at the place where more than three particle

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