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A form of battery separator that goes through the biaxial stretching process during production is referred to as a biaxially orientated separator. The separator material is stretched by applying tension in both the machine direction (MD) and the transverse direction (TD), which improves the material’s mechanical and physical qualities.
A polymer film, such as polyethylene (PE) or polypropylene (PP), which is frequently employed as the foundation material for battery separators, is usually subjected to the biaxial stretching method. The film is stretched in both directions at the same time, which aligns the material’s molecular structure and improves the separator’s physical characteristics.
The following are the main benefits of employing a biaxial stretching separator:
Biaxial stretching aligns the polymer chains in several orientations, which increases the separator’s tensile strength. During battery installation and use, this increased strength helps avoid punctures, tears, and distortion.
Enhanced dimensional stability: The stretching procedure gives the separator material dimensional stability, lowering the possibility of shrinkage or expansion. Because of its stability, the separator keeps its integrity and shape, delivering consistent performance for the duration of the battery.
Controlled porosity: Biaxial stretching allows for fine-grained adjustment of the separator’s pore size and distribution. This regulated porosity improves the battery’s rate capability and overall performance by enabling the efficient passage of ions between the electrodes.
Consistent and dependable performance is ensured throughout the battery because to the separation material’s uniform thickness, which is produced by the stretching process.
When high-performance separators are needed, such as in lithium-ion batteries, biaxial stretching separators are frequently utilized. Depending on the desired qualities and the particular battery chemistry, different stretching settings and conditions may be used.
A battery separator’s mechanical strength, dimensional stability, porosity control, and homogeneity are all improved by the biaxial stretching process. Biaxial stretching separators are a desirable option in advanced battery technologies as a result of the enhanced battery performance, robustness, and safety they provide.
The Global Biaxial Stretching Separator Market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
To meet rising demand, ENTEK announces a significant expansion of its U.S. lithium-ion battery separator business. The US Department of Energy’s requirement for a resilient and sustainable domestic US lithium battery supply chain has been met by ENTEK’s commitment to a transformational expansion of its US lithium-ion battery separator footprint.
With continuing expansion through yearly production of 1 billion square meters, ENTEK will have finished its first significant expansion of lithium-ion separator production in the US. This initial expansion will generate enough separator material once it is finished to fuel millions of electric automobiles.
