Upgraded PTFE Membrane Filter Media for Laser-Cutting Dust

Laser Cutting & Metal Processing

Upgraded PTFE Membrane Filter Media for Laser-Cutting Dust

Resolving rapid pressure-drop increase through application-specific membrane selection

Project Overview

Industry	Laser Cutting & Metal Processing
Application	Fine Metal Dust Collection
Challenge	Rapid Pressure-Drop Increase
Previous Media	Polyester Spunbond with PTFE Membrane
Solution	Upgraded PTFE Membrane Grade
Product Form	Filter Media

The Challenge

Laser cutting generates very fine metal dust, placing high demands on filter media.

The customer was already using polyester spunbond media with PTFE membrane lamination. However, the differential pressure increased rapidly during operation, affecting airflow stability and dust collector performance.

The challenge was not simply to use a PTFE membrane, but to select a membrane grade better suited to the fine dust and actual operating conditions.

The Solution

After reviewing the application and existing filter performance, FARRLEEY Filtration recommended an upgraded PTFE membrane grade.

The selected membrane provided high filtration efficiency while helping prevent the same rapid increase in differential pressure.

Selected Media

Polyester spunbond base material
Upgraded PTFE membrane lamination
Basis weight: 260 g/m²
Air permeability: 180 m³/m²/h at 200 Pa
Filtration efficiency: 99.99% at 0.3 µm
Maximum operating temperature: 120 °C

Trial rolls were supplied for processing and application testing before regular use.

The Result

After changing to the upgraded PTFE membrane grade, the rapid pressure-drop increase was resolved.

The dust collection system is currently operating well, with stable performance under the customer's actual working conditions.

This case demonstrates that PTFE membranes are not all the same. For fine laser-cutting dust, selecting the appropriate membrane grade is essential for balancing filtration efficiency and pressure-drop stability.

Facing a Similar Challenge?

Experiencing rapidly increasing pressure drop even when using PTFE membrane filter media?

FARRLEEY Filtration can help evaluate your current media specification and recommend a suitable solution based on the dust characteristics and operating conditions.

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