What Is a Leather Surface Treatment Agent?

In synthetic leather manufacturing, a surface treatment agent is the functional coating applied to the outer layer of leather — mainly used on PVC and PU leather. Sitting at the very top of the leather's structure, it forms a protective film that shapes the leather's look, feel, and performance.

In short, the surface treatment agent gives leather its "final look." The same PVC or PU base material can feel and look completely different depending on which surface treatment is used.

Main Functions

• Better hand feel: Gives leather a soft, smooth, silky, or genuine-leather-like touch.
• Better appearance: Creates matte, glossy, semi-matte, or textured finishes.
• More durability: Improves resistance to abrasion, scratches, stains, and aging.
• Surface protection: Reduces wear, fading, and damage over long-term use.
• Better eco-performance: Some water-based agents lower VOC emissions and reduce odor.

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Water-Based vs. Oil-Based Surface Treatment Agents

The market mainly splits into water-based and oil-based agents, differing chiefly in their solvent systems.

Summary

Water-based surface treatment agents point the way forward for eco-friendly synthetic leather, offering low VOC and low odor. Oil-based agents pollute more but still hold the larger market share today — though they're expected to be phased out over time.

That said, the surface treatment agent is only one piece of what makes leather quality. A great synthetic leather also depends on PVC resin content, base fabric quality, the foaming process, and overall production know-how to achieve good hand feel, durability, and eco-performance.

Final Note

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