Close-up of coating liquid being brushed onto a wood surface, photographed on site
Once a furniture plant speeds up its water-based wood coating line, the skin-over window of the coating narrows with the ambient conditions; the film sets before it has levelled, orange peel repeats sheet after sheet, and the sanding and rework hours climb with it.
Chemi Tech has introduced the KMP-4100 series leveling agent for topcoat spraying on water-based wood coatings, furniture coatings and industrial coatings, with the dosage adjusted flexibly according to the coating's solids content and the spraying environment. This grade is a water-borne leveling agent: its surface tension reduction is significant and its dynamic surface tension is likewise controllable, so the flow window widens without affecting recoat adhesion. Customers can set the adapted KMP-4100 scheme on the basis of measured data for panel orange-peel grade and gloss reading.
Advantages of Chemi Tech Leveling Agents
Chemi Tech KMP-4100 series leveling agent is configured for water-based wood coating systems. Surface tension reduction is significant, so the coating spreads fully across the panel and orange peel flattens progressively; dynamic surface tension is likewise controllable, leaving an ample flow window after spray atomisation; compatibility is outstanding, causing no cratering and leaving recoat adhesion and intercoat bonding unaffected; the effect on gloss is small, so the topcoat gloss reading does not drift with the additive dosage; and the dosage is adjusted flexibly to the coating's solids content, suiting both primer and topcoat.
Industry Pain Points and Solutions
Leveling problems in water-based wood coatings stem mostly from the combined effect of shear during spray atomisation and a mismatch in the coating's surface tension, and the consequences are concentrated in two places: repeated orange peel and unstable recoat adhesion.
Orange peel is copied sheet after sheet along the spray path, and on an open-grain finish the texture stands out especially under side light. Once the KMP-4100 dosage is fixed by the coating's solids content, the panel orange-peel grade is pressed down accordingly.
Unstable recoat adhesion leaves a risk of peeling between the two spray passes, and adhesion test values fluctuate around the critical line. KMP-4100 offers outstanding compatibility, leaving margin for recoat adhesion.
Rework batches take up spraying line capacity and sanding hours, slowing the delivery rhythm of the whole furniture coating shop. By tying the dosage range to changes in the coating's solids content and the spraying environment, single-pass film formation is secured.
Typical Operating Conditions and Verification
Customer case: a furniture coatings manufacturer in Guangdong, for the topcoat spraying stage of water-based wood coatings.
After the spring warm-up, orange peel on the plant's water-based topcoat line was reproduced sheet after sheet. Under side light the panel waviness was clearly visible, and the texture of the open-grain finish was largely covered over. The rectification scheme followed: KMP-4100 was adopted as the topcoat leveling agent, with the dosage fixed by the coating's solids content. After the spraying line was adjusted, the orange-peel grade fell back to the qualified band; the gloss reading stayed stable; recoat adhesion across the two spray passes passed consistently, and rework batches fell noticeably.
Frequently Asked Questions
Does adding a leveling agent to a water-based wood coating affect its recoatability?
Only by setting dynamic surface tension and the flow window side by side can the boundary between film leveling and recoating be seen clearly. KMP-4100 has completed orange-peel and recoat adhesion comparison tests at several solids levels, and within the recommended range leveling performance is stable and controllable. The actual dosage takes the coating's solids content and spraying environment as its baseline; Chemi Tech sets the adapted scheme through a parallel comparison of panel orange-peel grade and gloss reading.