Substrate Wetting Challenges for Water‑borne Inks & Coatings: How Gemini‑Structure Wetting Additives Help

Solve fish‑eyes, crawling and de‑wetting issues on low‑energy substrates. Explore non‑ionic and gemini‑structure wetting agents from Ruico for water‑borne systems.

Poor substrate wetting remains one of the  frequent root causes of surface defects in water‑borne inks and coatings. When liquid formula cannot spread uniformly over low‑energy surfaces, typical failures such as crawling, fish‑eyes, pinholes and uneven film build‑up will occur.

Not all wetting agents perform equally. Ruico’s wetting‑agent portfolio covers multiple chemical families:

1. Non‑ionic isoalcohol‑ether wetting agents (RF‑A4470): Good cost performance, suitable for general‑purpose water‑borne formulas, equivalent to Clariant reference grades.
2. Silicone‑polyether wetting additives (RF‑A151): Balanced wetting performance with limited foaming tendency.
3. Twin‑structure polyether‑modified siloxane wetting agent (RF‑A140T): Matches TEGO 4100, delivers outstanding dynamic surface‑tension reduction for high‑speed printing conditions.

Important considerations for formulators:

• Wetting efficiency vs foam generation: High‑performance wetting agents may introduce extra micro‑foam, requiring matching defoamer adjustment.
• Compatibility risk: Avoid incompatibility when mixing anionic and non‑ionic additives.

Our technical team can provide grade recommendation according to your substrate type and processing parameters.

Contact us for lab samples and technical documentation.  [email protected]