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如何通过目测的方式来评定彩涂板涂料的状态

发布者:唐山天物彩板有限    发布时间:2019-09-02 08:29
郑州彩涂板价格优惠_郑州彩涂板长期生产_天物彩

如何通过目测的方式来评定彩涂板涂料的状态

唐山天物彩板全国配送——郑州彩涂板价格优惠_郑州彩涂板长期生产  更多信息请拨打网站上方电话咨询了解



  观察彩涂板涂料是否结皮、胶凝、分层、沉淀和细度等情况,有条件的单位,最好按照国家标准CB6753.3-86测定涂料的储存稳定性。

  (1)结皮。彩涂板涂料开筒后,经常会发现在最上层有一层结皮,这是由于醇酸类涂料氧化固化形成的。观察结皮的程度,如有结皮,则沿容器内壁分离除去。结皮层已无法使用下层涂料可继续使用,使用时攬拌均匀。除去结皮的涂料要尽快用完,否则放置一段时间后又会有结皮产生,甚至报废。

  (2)胶凝。当彩涂板涂料出现胶凝现象,可搅摔或加入溶剂搅拌,使用时过滤。若不能分散成正常状态,则涂料报废。

  (3)分层。彩涂板涂料在贮存一段时间后,彩涂板涂料会出现分层现象,涂料颗粒下沉,在上层四分之一以上形成一层水质溶液,在选择时我们可以看到这层液体呈无色或微黄色,较清晰干净,无漂浮物或很少,这说明涂料质量很好。若水质溶液呈混浊状,呈现出涂料颜色或内部漂浮物数量很多,甚至布满溶液表面,说明涂料质量不佳或贮存保质期已过,不宜使用。

  (4)彩涂板涂料颗粒细度。我们可用一杯清水来检验,取少量彩涂板涂料放入水中,轻轻搅动后若杯中水仍清澈见底,涂料颗粒在清水中相对独立,没有黏合现象,且颗粒大小较均匀,说明彩涂板涂料质量很好。如果一经搅动,杯中水立即变浑浊,且颗粒大小分化,说明涂料质量不过关,不用为佳。再者可用木棍插进筒中将涂料拌匀,再用木棍挑起来,优质涂料往下流时会成扇面形,用手指摸,正品涂料应该手感光滑、细腻。

  (5)外观颜色。彩涂生产线使用的涂料是含有颜色的胶粒体,正常的外观要求是颜色致,不产生浮色,不允许颜色有深有浅。检查涂料颜色,通常是用肉眼观察,也可与生产厂提供的标准色板进行比较,应符合指定的色差范围。

Observe whether the coating is crust, gelation, stratification, precipitation and fineness, etc. Conditional units, it is best to determine the storage stability of the coating in accordance with the national standard CB6753.3-86.
 
 
(1) Crust. When the coating is opened, it is often found that there is a layer of crust on the top layer, which is formed by oxidation curing of alkyd coatings. Observe the degree of crust. If there is crust, it will be removed along the inner wall of the container. The crust layer can no longer be used in the lower coatings, and can be mixed evenly when used. Removal of crust paint should be used up as soon as possible, otherwise, after a period of time there will be crust, or even scrap.
 
 
(2) Cementing. When gelling occurs, the paint can be stirred or mixed with solvent, and filtered when used. If it can not be dispersed into normal state, the paint will be scrapped.
 
 
(3) stratification. After storage for a period of time, the coating will be stratified. The particles of the coating will sink and form a layer of water quality solution over a quarter of the upper layer. When choosing, we can see that the liquid is colorless or yellowish, clearer and cleaner, and there is no float or very little. This shows that the quality of the coating is very good. If the water quality solution is turbid, showing paint color or a large number of internal floats, or even covered with the surface of the solution, it indicates that the quality of the paint is not good or the shelf life has passed, it is not suitable for use.
 
 
(4) Coating particle size. We can use a cup of water to test, take a small amount of paint into the water, gently agitate the water in the cup is still clear to the bottom, paint particles in clear water are relatively independent, there is no bonding phenomenon, and the particle size is more uniform, indicating that the paint quality is good. If once agitated, the water in the cup becomes turbid immediately, and the particle size is differentiated, indicating that the quality of the paint is not good, not good. Then you can use wooden sticks into the cylinder to mix the paint, and then use wooden sticks to pick up, high-quality paint downstream will become fan-shaped, touch with your fingers, genuine paint should feel smooth and delicate.
 
 
(5) Appearance color. Coatings used in color coating production line are colloidal particles with color. The normal appearance requirement is color, no float, no darkness or shade of color is allowed. Checking paint color, usually with naked eye observation, can also be compared with the standard color plate provided by the manufacturer, should meet the specified range of color difference.
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