1. Comma Scraper Coating

(适用于高固含量 & 高粘度浆料 High Solid Content & High Viscosity Slurry)

In this method, the slurry directly contacts the moving substrate through a coating blade (scraper). The gap between the scraper and substrate determines the coating thickness. Excess slurry returns to the tank, and a uniform film forms on the substrate.

Key Features:

• High coating force and precision

• Excellent for high-viscosity and high-solid-content slurries

• Suitable for thick coatings

• Simple structure but requires fine blade adjustment

2. Slot-Die Extrusion Coating

(适用于多种浆料粘度与固含范围 Broad Material Compatibility)

This technique uses a slot-die head to extrude slurry under controlled pressure and flow rate. The slurry is dispensed through a slit, then lands evenly on the substrate via nip rollers.

Key Features:

• Higher coating speed and precision

• Consistent coating moisture and thickness uniformity

• Sealed system reduces contamination risk

• High slurry utilization rate

• Ideal for multi-layer coatings

 Which One Should You Choose?

 Expert Tip:

For cutting-edge lithium battery or supercapacitor production, slot-die coating is increasingly favored for its precision and efficiency—especially when handling next-gen slurry systems with tight uniformity requirements.