增平剂如何发挥作用？

Quick answer: A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.

1.平整概述

After the construction of paint, there is a flow and drying film-forming process, and then gradually form a flat, smooth, uniform coating film. Whether the coating film can achieve the characteristics of flat and smooth is called leveling. In the actual construction process of the coating, the film defects that often appear are orange peel, fish-eye, shrinkage, pinhole, shrinkage, Benedict swirl, air sensitivity and due to poor leveling, brush marks when brushing, roller coating roller marks are known as poor leveling, the generation of these phenomena reduces the decorative and protective function of the coating. There are many factors affecting the leveling of coatings, such as solvent volatility gradient and solubility properties, surface tension of coatings, wet film thickness and surface tension gradient, rheology of coatings, construction process and environment, etc., of which the most important factors are the surface tension of coatings, surface tension gradient generated by the wet film in the film-forming process and the surface tension homogenization of the surface layer of the wet film. To improve the leveling of coatings, it is necessary to consider adjusting the formulation and adding suitable additives. In practice, CHLUMILE 3345 Leveling Agent 和 CHLUMILE 3033 Leveling Agent are often compared so that the coatings have suitable surface tension and the ability to reduce the surface tension gradient.
2.流平剂的作用
润湿底材后，控制涂料流动性以达到最终流平的助剂称为流平剂，可解决以下问题
3.平整度的主要影响因素
3.1.表面张力梯度--液气界面
内层和外层的表面张力梯度导致贝纳漩涡的产生
消除表面张力梯度是获得平整表面的基本要素
3.2.表面张力--液固界面
表面张力低于底材，因此涂层对底材有更好的润湿性
降低涂层的表面张力，从而提高液体的长波流平性。
4.平整速度的影响因素
粘度越高，流平速度越慢。
薄膜越厚，流平速度越快。
表面张力越大，流平速度越快。
5.不同流平剂的机理和特性
5.1) 消除表面张力梯度
5.2 降低系统的表面张力。
有机硅。
-显著降低表面张力
有机硅： - 显著降低表面张力 - 良好的迁移性能消除表面张力梯度
非硅和非氟： - 表面张力无明显降低
-表面张力没有明显降低
- 无表面迁移
- 涂层内的定向，调整局部表面张力的均匀性

How buyers usually evaluate coating and ink additives

Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.

• Start from the defect, not the additive name: wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.
• Check compatibility at the intended dosage: the strongest additive can still be the wrong commercial choice if it narrows the process window too much.
• Review the stage of use: some products are most useful during grind, while others matter more during let-down, filling, or final application.
• Balance cure or film quality with defect control: the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.

Recommended product references

• CHLUMIAF 094: A balanced defoamer reference for waterborne coatings and many general foam-control screens.
• CHLUMIAF 3062: Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.
• CHLUMIAF 3037: A stronger process-defoaming option when persistent foam survives harsher conditions.
• CHLUMIWE 3280: A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.

FAQ for buyers and formulators

Why does an additive that looks powerful in a beaker sometimes fail in production?
Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.

Should the most aggressive additive always be preferred?
Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.