Project Reference — Sanfai Nonwoven

Project Definition

China Industrial Filtration High-temperature / Ambient-temperature Synthetic Filtration Materials (Composite Structure)

Customer Requirements

The customer requires the ability to produce both high-temperature and ambient-temperature filtration materials on a single line, ensuring high structural integrity and composite bonding strength.

Project Achievements

Achieved single-line production for both high-temperature and ambient-temperature filtration media.
Products exhibit superior peel strength and structural stability.
Stable operation for 3 years with easy product changeover and high value-added output.

Solutions

01

Dual-path Production Line Design

Integrated line featuring both a Spunlace section and a Needle Punching Folding section to handle different material types.
Flexible switching between products to maximize equipment efficiency.

02

Specialized Needling Units

Spunlace Line: Features a co-positional counter-punching structure tailored for scrim-reinforced composites, enhancing entanglement between fibers and woven fabric.
Needle Punching Line: High-density needling across multiple units (up to approx. 58,050 needles/m) + secondary needling.
Utilization of high fiber-carrying needles with reasonable advance-per-stroke (≥ 5–6 mm).
Guaranteed high peel strength and structural stability, achieving a smooth surface with minimal shedding.

Technical Data

Fiber: High-temp: P84 (Polyimide), Meta-aramid (0.89–2.78 dtex × 38–51 mm); Ambient-temp: PET, COPET-4080 (2.2–6.6 dtex × 51–65 mm)
Width - Spunlace Line: Max 2,400 mm for sandwich woven scrim; Max 3,500 mm for pure fiber web
Width - Needle Punching Line: Max 5,100 mm
Weight: Max 1,000 g/m²; standard production within 600 g/m² (including 100 g/m² reinforcement scrim)
Speed - Spunlace Line: 2.0–10.0 m/min (up to 12.0 m/min @ 60Hz)
Speed - Needle Punching Line: 1.5–7.5 m/min (up to 9.0 m/min @ 60Hz)
Capacity: ≈ 680–690 kg/h (consistent across both paths)