如何衡量油墨中树脂的好坏？

Quick answer: Surface-control additives are usually selected by defect type, compatibility, and dosage window. The strongest commercial choice is the one that fixes the real problem without creating a new one.

衡量树脂物理和化学性质的指标有很多。对于油墨行业来说，以下问题值得关注。

(1) 树脂的粘度
树脂的粘度在很大程度上会影响油墨的粘度，在选择树脂时应考虑其粘度的大小。

 

(2) 树脂在溶剂中的溶解度
在油墨生产中，需要在树脂中加入一定量的溶剂来调节粘度等指标，因此，树脂能否完全溶解在所选用的溶剂或矿物油中，是油墨生产的基本要求；。

(3) 释放树脂中的溶剂
树脂中溶剂的释放是指溶剂从树脂中释放的速度。这会影响油墨的干燥速度。这与树脂本身有关，与溶剂挥发性能好坏有关，也与树脂和溶剂混合的制备工艺等因素有关。

(4) 树脂的颜色
树脂应为无色或浅色液体，以免因树脂的颜色而影响油墨的颜色。

(5) 树脂的防水性
树脂的耐水性会影响油墨的耐水性，尤其是胶印油墨，耐水性差的油墨会出现乳化、糊版、不下墨等现象。水性油墨所用的树脂要求有良好的水稀释性能，但在基材上成膜后要求不能溶于水。

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.