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    环氧地坪漆表面起泡是什么原因?如何预防?

    2019-07-03 11:38:34 无锡盛发地坪科技有限公司 阅读

    由于潮气和挥发性液体的存在,环氧地坪涂膜在干燥过程中或在高温高湿下表面出现许多大下不均、圆形不规则的泡状鼓起现象,称为起泡。起泡主要是环氧地坪施工不当造成的。与环氧地坪漆涂层表面起泡非常相似的弊病是涂膜起“痱子”,因为“痱子”形状与起泡很相似,但一般要小,起因也有些类似。

    Owing to the existence of moisture and volatile liquids, there are many uneven and irregular bubbling phenomena on the surface of epoxy floor coating during drying or at high temperature and humidity, which are called bubbling. Foaming is mainly caused by improper construction of epoxy floor. The disadvantage very similar to the foaming on the surface of epoxy floor paint is "prickles" on the coating, because the shape of "prickles" is very similar to the foaming, but generally smaller, and the causes are similar. 痱子的起因

    Causes of prickly heat

    漆料对底材湿润能力不够,或底材处理不净;

    Lacquer has insufficient wettability to the base material, or the base material is not treated cleanly.

    溶剂挥发过快,使用过快稀料或加温过快;

    Solvent volatilization is too fast, using too fast dilute material or heating too fast;

    单层施工过厚或每道间隔时间过短;

    The single layer construction is too thick or the interval time is too short.

    聚氨酯油漆中含有水分或在潮湿环境中干燥;

    Polyurethane paint contains moisture or dries in wet environment.

    烤漆在5℃以下施工;

    The baking paint is constructed below 5 C.

    涂膜未完全干燥即暴露于潮湿环境中(完全干燥也可能会出现)。

    If the coating is not completely dry, it will be exposed to humid environment (complete drying may also occur).痱子的形成

    Formation of prickly heat

    痱子的形成比较复杂,最可能引起痱子的是溶剂保留和水分作用。

    The formation of prickly heat is complex, and the most likely cause of prickly heat is solvent retention and water action.

    在较高温度环境中,剧烈的溶剂挥发与较强溶剂保留会造成溶剂蒸汽滞留于涂膜内,从而形成痱子;

    In high temperature environment, intense solvent volatilization and strong solvent retention will cause solvent vapor to stay in the film, thus forming prickles.

    在较低温度下,湿涂膜流动性差,特别是表面因溶剂挥发造成温度偏底,流动性更差,更宜造成溶剂蒸汽滞留;

    At lower temperatures, the fluidity of wet coatings is poor, especially when the surface temperature is low due to solvent volatilization, the fluidity is worse, and it is more suitable to cause solvent vapor retention.

    水分也易引起痱子,漆料里水分和施工环境中的潮气起痱均匀,而涂膜受潮气侵蚀而起的痱子往往不均匀,如虫爬一般有一定图样。

    Water is also easy to cause prickles. The moisture in the paint and the moisture in the construction environment are uniform, while the prickles caused by the moisture erosion of the coating film are often uneven, such as worms generally have certain patterns.

    起泡预防措施

    Bubble prevention measures

    改善涂膜干性,从而改善涂膜溶剂释放性;

    Improve the dryness of the film, thereby improving the solvent release of the film;

    避免底温下施工干燥;

    Avoid construction drying at bottom temperature.

    降低溶剂极性,从而降低了涂膜对溶剂的保留能力;

    The polarity of solvents is reduced, which reduces the retention of solvents.

    使用正确的表面助剂,改善表面透气性;

    Use the correct surface aids to improve the surface permeability;

    使用正确的稀释剂和固化剂。

    Use the right diluents and curing agents.


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