Description
ATOMFAIR® AFSPPP20U60MM20M DRY PROCESS PP SEPARATORRESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This polypropylene separator must be stored in a sealed, dry, low-temperature, and well-ventilated environment away from all heat sources and sunlight to prevent thermal degradation and structural failure. Mechanical handling during battery assembly must avoid excessive tensile or puncture forces that could exceed the material's rated strength limits and cause tearing or perforation.
- Storage Environment: Store the separator in a sealed plastic bag within a dry, low-temperature, and well-ventilated area to inhibit moisture absorption and thermal degradation.
- Thermal Stability: Avoid exposing the separator to temperatures approaching its melting point or to conditions that induce measurable heat shrinkage.
- Mechanical Handling: Apply handling forces well below the material's puncture and tensile strength limits to prevent mechanical failure during winding or lamination.
- Electrochemical Compatibility: Confirm chemical compatibility with the electrolyte and electrode materials used in lithium-rich manganese-based battery systems prior to assembly.
- Contamination Prevention: Maintain a cleanroom or glovebox environment during processing to prevent particulate contamination that could cause short circuits or performance degradation.
Given the anisotropic tensile strength (MD 158 kg/cm³ vs TD 414 kg/cm³), how does this affect roll-to-roll processing alignment for lithium-rich manganese-based battery assembly?
The significant anisotropy in tensile strength requires careful machine direction (MD) alignment during winding to avoid preferential tearing. The 20μm separator has a longitudinal tensile strength of 158 kg/cm³ and transverse strength of 414 kg/cm³, meaning the film is weaker along the machine direction, so web tension must be precisely controlled to prevent MD failure.
Why is this dry-process PP separator specifically recommended for lithium-rich manganese-based batteries rather than standard PE separators?
This separator is optimized for lithium-rich manganese-based batteries because its PP base film offers a melting temperature of 167°C, which is 32°C higher than typical PE separators (e.g., AF-PE20 melts at 135°C). The higher thermal stability and low transverse heat shrinkage (0.1% at TD) reduce the risk of internal short circuits from cathode expansion or high-voltage operation, which is critical for the high-energy-density Li-rich Mn chemistry.
What are the critical storage conditions to maintain the structural integrity of this 20μm dry-process PP separator before use?
The separator must be stored sealed in a dry, well-ventilated environment at normal or low temperature, away from fire and heat sources. Exposure to sunlight, rain, or high humidity during transport can compromise the 11.5 g/m² areal density and 40% porosity uniformity, leading to defects. The plastic sealed bag and buffer pad packaging protect the 20μm-thin film from physical damage.
This 20μm dry-process PP separator is engineered for lithium-rich manganese-based batteries, offering low heat shrinkage (MD ≤1.1%, TD ≤0.1%) and high melting temperature (167°C), but requires strict storage conditions and has a puncture strength of only 167g compared to alternative wet-process separators.
Positive
- High transverse tensile strength: The separator exhibits a transverse tensile strength of 414 kg/cm³, significantly higher than the longitudinal value, providing robust mechanical integrity in the width direction.
- Low heat shrinkage profile: With longitudinal heat shrinkage of 1.1% and transverse of 0.1% at elevated temperatures, the separator maintains dimensional stability during battery thermal cycles.
Trade-offs
- Controlled storage environment needed: The separator must be sealed and stored in a cool, dry, well-ventilated area away from fire and heat sources to prevent degradation.
- Moderate puncture strength: At 167g, the puncture strength is lower than that of wet-process PE separators (e.g., AF-PE20 at 722g), indicating reduced capability to withstand sharp particle penetration.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
