2340 Separator Roll 100mm × 10m — PP/PE/PP 38 µm High-Strength Battery Separator for Na-ion, K-ion, Li-ion, Li-S Cells

**2340 Separator Roll 100mm × 10m — PP/PE/PP Trilayer 38 µm Microporous Membrane** The LabCore **\*\*Separator 2340\*\*** is a **\*\*38 µm PP/PE/PP trilayer microporous membrane\*\*** made by a dry-stretch process, **\*\*purpose-built for laboratory-scale, multi-chemistry battery research\*\***. At 38 µm it offers roughly 30% higher puncture strength and greater resistance to mechanical abuse than 25 µm grades — better suited to high-load, high-safety test setups. The PP outer layers provide oxidation resistance and cycling stability; the PE inner layer delivers high-speed thermal shutdown. Transverse (TD) shrinkage is held to ≤0% @ 90 °C/1h — a safety-critical spec that suppresses internal shorts during high-temperature cycling. At 45% porosity the membrane balances ion transport against mechanical strength. Each roll is 100 mm wide × 10 m long. **Key Specifications** | Property | Value | Unit | |---|---|---| | Structure | PP/PE/PP trilayer | — | | Thickness | 38 | µm | | Porosity | 45 | % | | Gurley (JIS) | 780 | s/100cc | | TD shrinkage @ 90 °C/1h | ≤ 0 | % | | Puncture strength | ≥ 500 | g | | Tensile strength, MD | ≥ 1630 | kg/cm² | | Tensile strength, TD | ≥ 165 | kg/cm² | **What's in the Box** - 1 × Separator 2340 roll (38 µm × 100 mm × 10 m), vacuum-sealed - 1 × Storage & handling card - 1 × TDS download card (QR code) **Storage & Handling** Store at 25 ± 3 °C, 30–70% RH, kept vacuum-sealed until use. After cutting, reseal in the original bag or transfer into a glovebox. Avoid direct sunlight and high humidity. **Research Use Only** Supplied for laboratory research and development only — not for medical, diagnostic, or commercial finished-battery use.