What are the Functions of Surface Treatment for Melt Blown Filter Cartridges?

In industrial filtration, Melt Blown Filter Cartridges rely not only on precision and dimensions but also on surface texture, which significantly affects filtration efficiency, service life, and operating costs. Below is a quick guide to five common surface types to help you make more precise and cost-effective selections.

1. Smooth Surface: Ideal for Terminal Precision Filtration

The surface is smooth and compact, with fibers highly compressed. Its main advantages are low resistance to flow, low initial pressure drop, and minimal risk of clogging by large particles. As a surface filtration type, it is easy to clean and particularly suitable for relatively clean liquids, serving as the final barrier. Applications: Ultra-pure water, beverages, and pharmaceutical products.

2. Grooved Surface: Durable and Clog-Resistant

The surface is covered with uniform grooves (e.g., threads or stripes), which increase the effective filtration area by 10 - 30%. The larger surface area enhances dirt-holding capacity and extends service life. Grooves also trap larger particles first, providing graded filtration that protects downstream precision equipment. Applications: Industrial circulation water, cooling water, and pre-filtration for RO systems.

3. Cavity / Embossed Surface: Dirt-Holding "Tactician"

Also known as Cavity Surface, this texture features regularly arranged dimples or embossed patterns, resembling miniature "craters". The design improves deep-layer dirt-holding. By dispersing the flow, particles are guided into the interior rather than accumulating on the surface, reducing surface clogging and significantly increasing dirt capacity and service life. Applications: Industrial water and chemical liquids with medium contamination, or systems requiring long operational cycles.

4. Furry Surface: High-Turbidity Wastewater "Adsorption Champion"

The surface appears fluffy because the outer fibers are not fully fused, forming a loose, porous 3D structure. This deep-layer filtration type has large internal volume and strong adsorption, efficiently capturing suspended solids, silt, and colloids. While initial pressure drop is slightly higher, it excels at handling heavily contaminated liquids. After Furry Surface treatment, the filter cartridge achieves higher dirt capacity, stronger pressure resistance, stable performance, long service life, and filtration efficiency up to 99.9%. Applications: High-turbidity pre-treatment of electroplating wastewater, mining wastewater, and pulp slurry.

5. Orange Surface: Balanced All-Rounder

The surface has uniform micro-convex points resembling an orange peel, formed through controlled processing. This treatment increases surface roughness and friction. The cartridge gains higher hardness, stronger pressure resistance, longer service life, and stable particle removal. It balances performance, providing uniform retention while maintaining structural strength, making it a versatile choice. Applications: General industrial water treatment, 1 - 10 μm filtration, circulation water, and cooling water.

Melt Blown Filter Cartridge Surface Texture Reference Table：

Conclusion

Filtration is all in the details. Choosing the right surface texture for your fluids not only enhances filtration performance but also extends equipment life and reduces operating costs. Next time you select a filter cartridge, don't forget to ask: "What surface texture does this cartridge have?”We hope this guide helps you make informed filtration choices. For specific operating conditions or custom solutions, our technical team is always ready to assist.