Polyester Non-woven Battery Tubes with High Porosity, Low Internal Resistance, and High Mechanical Strength for Tubular Lead-Acid Batteries

Product Overview

Material & Production Process

   Our battery tubes are made of polyester raw materials via an integrated one-step continuous production process: high-temperature melting, melt-blown spinning, web forming, hot pressing and winding. Spunlace treatment creates uniform micro-pores on the non-woven substrate for tube fabrication.

Basic Physical Properties of Non-woven Fabric

Moisture-proof, breathable, flexible, lightweight, non-combustible, biodegradable, non-toxic and non-irritating, perfectly compatible with the acidic internal environment of lead-acid batteries.

Real Product Photos

Four Core Advantages

1.High Porosity & Micro-aperture, Zero Loss of Active Substances

The non-woven material forms dense and uniform micro-pores with a stable porosity of 72.5%, far higher than ordinary polyester woven tubes. Tiny apertures completely eliminate powder leakage, electrolyte seepage and shedding of active substances during battery production and cycling.

In 10 groups of parallel tests, the porosity of non-woven tubes stays at 68%-73%, while common polyester woven tubes only reach 50%-56%, showing huge gaps in liquid storage and air permeability.

2.Low Internal Resistance for Stronger Discharge Capacity

Special customized processing keeps DC resistance much lower than standard polyester tubes. Electrolyte diffuses freely with efficient ion migration, greatly boosting high-rate discharge performance of batteries.

The internal resistance of non-woven tubes remains steady at 0.002-0.003Ω.dm² throughout all tests, while woven tubes have higher and fluctuating resistance with greater conductive loss.

3.Outstanding Mechanical Strength to Lock Active Materials Firmly

Excellent anti-deformation load performance. The tubes maintain stable structure under 0-4bar internal pressure generated during battery charge-discharge cycles, tightly locking positive active substances and preventing pole plate expansion & paste shedding.

The pressure resistance of non-woven tubes stabilizes around 60N in all tests, versus only about 40N for ordinary polyester tubes, with stronger pressure and deformation resistance.

4.Larger Battery Capacity & Extended Cycle Service Life

• 60% DOD cycle test on 500 gel batteries: batteries equipped with non-woven tubes deliver higher discharge capacity and slower capacity attenuation than those with polyester woven tubes.
• National standard 5-hour rate discharge test: batteries with non-woven tubes have an 8-10 minutes longer discharge duration than traditional polyester woven tubes.
• Long-term mass feedback from domestic and overseas battery manufacturers: non-woven battery tubes outperform conventional polyester woven tubes in overall comprehensive performance.

Performance Comparison

Domestic vs Imported Non-woven Tubes

Leading domestic battery manufacturers conducted full comparison tests between our tubes and imported counterparts, covering physical & chemical indicators, production line machinability and finished battery performance. All indicators match imported products without obvious performance gaps.