20μm Lithium Battery PE Separator

Product Name: WS-20 Wet-process PE separator

Model Number:AS-WS-20

Brand Name: AS

Product Origin:China

Product description: The WS-20 wet-process PE separator (20μm thickness, 45% porosity) delivers ≥600gf puncture resistance and 1500kgf/cm² MD tensile strength. With ≤1.0% TD thermal shrinkage, it enhances safety and cycle life for 4.4V NCM and energy storage batteries.

The PE separator for lithium batteries is made of polyethylene material and features a micro-porous structure. It can isolate the positive and negative electrodes to prevent short circuits while allowing lithium ions to pass through. It features excellent chemical stability, mechanical strength and high-temperature resistance (melting point approximately 105℃), and is commonly used as a single-layer film or in combination with PP (such as a three-layer structure of PP/PE/PP) to enhance puncture strength and thermal stability. It is widely used in power and energy storage batteries. Through the biaxial stretching process, the pore size and porosity are controlled to ensure the battery's cycle life and safety.

Product model				WS-20(Wet-process PE separator)
Serial number	Test items			Testing tools, instruments and equipment	Parameters
1	Appearance	Other appearances		Visual estimation	The surface is smooth, the winding is neat, and there are no wrinkles, dirt or other defects
2	Slit width (mm)			Caliper	+0.5
3	Thickness (um)			Micrometer	20.0±2.0
4	Surface density (g/m ²)			Electronic balance	11.0±1.0
5	Air permeability (sec/100cc)			Air permeability tester	200±50
6	Porosity of the base film (%)			Micrometer, electronic balance, air permeability tester	45±5%
7	Needle-puncture strength (gf			Electronic universal testing machine	≥600
8	Tensile strength (kgf/cm ²)		MD	Electronic universal testing machine	≥1500
			TD		≥1500
9	Thermal contraction		MD	Oven, ruler	≤3.0%
			TD		≤3.0%
10	Outer packaging			The inner part is sealed in a transparent white sealed plastic bag. The pallets and central paper tubes are suspended and fixed. The outer part is packed in a cardboard box. The outer box is marked with the model, quantity, shipping date, etc.
Precautions				Handle with care to avoid hitting hard objects and damaging the diaphragm. The unused diaphragm must be put back into the plastic bag for storage. The storage temperature should be 25+5℃ and the humidity should be 50%.

Company Profile

Xiamen AS battery equipment Technology Co LTD was set up as a manufacturer in 2006. We have total manufacturing facilities of around 4, 000 square meters and more than 65 staff. Owning a group of experienced engineers and staffs, we can bring you not only reliable products and technology, but also excellent services and real value you will expect and enjoy. AS Battery has been focused on product development and operations of lithium battery and its surrounding, we supply full kinds of lithium-ion battery equipment, lab battery raw materials and lithium-ion battery research and development technology.