Industrial PE Separators are high-quality polyethylene sheets designed for use in batteries and energy storage systems. They ensure excellent chemical stability, mechanical strength, and thermal resistance, providing safe and efficient battery performance. Ideal for industrial applications, these separators help prevent short circuits, improve battery life, and enhance overall efficiency.

Material Composition

• Made from high‑grade Polyethylene (PE) thermoplastic polymer — microporous membrane with controlled pore structure to enable ion transport while electrically isolating electrodes.

Physical & Structural Properties

• Thickness: Typically 6 µm – 25 µm depending on application (industrial, traction, mono/flat plate batteries) — thinner films for higher energy applications, thicker films for mechanical durability.
• Porosity: ≥ 40 – 60 % (porous volume ratio) — ensures electrolyte uptake and ion flow.
• Pore Size: Micro‑/nano‑scale pores (nm range) with uniform distribution for controlled ionic transport.
• Density: Optimized for stable battery performance (varies by manufacturer).

Mechanical Performance

• Tensile Strength: High mechanical strength for handling during manufacturing and cell assembly.
• Puncture Resistance: Good resistance to penetration and folding.
• Dimensional Stability: Low shrinkage and stable dimensions under operating temperatures.

Electrical & Electrochemical

• Electrical Insulation: Excellent dielectric barrier — prevents internal short circuits.
• Low Ionic Resistance: Enables efficient ionic conductivity through pores.

Thermal Properties

• Thermal Stability: Maintains structure within service temperature range (PE melt point ~120‑135 °C).
• Shutdown Behavior: At higher temperatures, PE may shrink to block ion passage — a safety feature in some designs.

Chemical Resistance

• Resistant to battery electrolyte environments (e.g., sulfuric acid in lead‑acid batteries) with minimal degradation.

Moisture & Impurities

• Moisture Content: Low (≤ 4%) to ensure dimensional and performance stability.
• Fe & Cl Content: Very low impurity levels (often ≤ 0.01 %, ≤ 0.03 % respectively).

Standard Sizes / Formats

• Supplied in reels or cut strips tailored to battery plate size.
• Ribbed or embossed surface designs available to enhance electrolyte distribution and reduce cracking.