Description
1. Product Information
- Product Name: Dry-process PP Separator 20um (for scientific research and experimental use)
- Product Code: AF-PP20
- Product Model: AFSPPP20U60mm10m
- Dimension Specification: 60mm*10m
- Application Scenario: Mainly used in the field of scientific research and experiments as a key internal component of batteries to achieve positive and negative electrode isolation and ensure ion transmission.
2. Specification Parameters
| Item | Parameter Value |
|---|---|
| Code | AF-PP20 |
| Name | Dry-process PP Separator 20um |
| Base Film | PP |
| Base Film Thickness (μm) | 20 |
| Total Thickness (μm) | 20 |
| Width (mm) | 60 |
| Surface Density (g/m²) | 11.5 |
| Porosity (%) | 40 |
| Air Permeability (S) | 355 |
| Longitudinal Thermal Shrinkage MD (%) | 1.1 |
| Transverse Thermal Shrinkage TD (%) | 0.1 |
| Longitudinal Tensile Strength MD (kg/cm³) | 158 |
| Transverse Tensile Strength TD (kg/cm³) | 20 |
| Puncture Strength (g) | 414 |
| Melting Temperature (℃) | 167 |
3. Packaging & Storage
- Packaging Method: The product is packaged with plastic-sealed bags and cushion pads to ensure integrity during transportation and storage.
- Storage Conditions:
- Environmental Requirements: Sealed and stored in a normal or low temperature, dry, and well-ventilated environment.
- Notes: Keep away from fire and heat sources, and avoid contact with flammable and explosive materials.
- Transportation Requirements:
- Avoid exposure to sunlight, fire baking, and rain to prevent product performance from being affected by the environment.
- Handle with care during transportation to avoid severe collision and extrusion.
4. Other Specifications
| Code | Name | Base Film | Base Film Thickness (μm) | Total Thickness (μm) | Width (mm) | Surface Density (g/m²) | Porosity (%) | Air Permeability (S) | Longitudinal Thermal Shrinkage MD (%) | Transverse Thermal Shrinkage TD (%) | Longitudinal Tensile Strength MD (kg/cm³) | Transverse Tensile Strength TD (kg/cm³) | Puncture Strength (g) | Melting Temperature (℃) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AF-PP16 | Dry-process PP Separator 16um | PP | 16 | 16 | 60 | 8.75 | 41 | 210 | 1.6 | 0 | 140 | 17 | 380 | 167 |
| AF-PP20 | Dry-process PP Separator 20um | PP | 20 | 20 | 60 | 11.5 | 40 | 355 | 1.1 | 0.1 | 158 | 20 | 414 | 167 |
| AF-PP25 | Dry-process PP Separator 25um | PP | 25 | 25 | 60 | 13.6 | 40 | 349 | 1.8 | 0.1 | 172 | 20 | 429 | 167 |
| AF-PE7 | Wet-process PE Separator 7um | PE | 7 | 7 | 60 | 4.3 | 40 | 155 | 1.2 | 0.1 | 221 | 180 | 339 | 135 |
| AF-PE9 | Wet-process PE Separator 9um | PE | 9 | 9 | 60 | 5.7 | 38 | 185 | 1.5 | 0.1 | 221 | 156 | 410 | 135 |
| AF-PE12 | Wet-process PE Separator 12um | PE | 12 | 12 | 60 | 7.1 | 40 | 222 | 0.9 | 0.1 | 208 | 167 | 566 | 135 |
| AF-PE16 | Wet-process PE Separator 16um | PE | 16 | 16 | 60 | 8.8 | 39 | 224 | 1.2 | 0.1 | 192 | 156 | 535 | 135 |
| AF-PE20 | Wet-process PE Separator 20um | PE | 20 | 20 | 60 | 11 | 41 | 224 | 1.4 | 0.1 | 196 | 165 | 722 | 135 |
If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.
This dry-process polypropylene separator is used in lithium-ion battery research to isolate electrodes while enabling ion transport, featuring a 20 μm thickness, 40% porosity, and low thermal shrinkage. It requires storage in a sealed, dry, cool environment away from heat and flame, and must be handled gently to avoid mechanical damage.
- Base Film Material: The base film is polypropylene with a melting temperature of 167°C and a puncture strength of 414 g.
- Thermal Shrinkage: Longitudinal thermal shrinkage is 1.1% and transverse shrinkage is 0.1% at elevated temperatures.
- Mechanical Strength: Longitudinal tensile strength is 158 kg/cm³ and transverse tensile strength is 20 kg/cm³.
- Packaging: The separator is packaged in plastic-sealed bags with cushion pads to ensure integrity during storage and transport.
- Storage Conditions: Store in a normal or low temperature, dry, well-ventilated environment away from fire and heat sources.
Proper handling and storage preserve the separator's dimensional stability and prevent contamination or damage. The following steps outline the required conditions for safe storage and transport.
Required Equipment: Plastic-sealed bag, Cushion pad
- Store in dry environment
Store the separator in its original plastic-sealed bag in a dry, low-temperature, well-ventilated area. - Avoid heat and flame
Keep the separator away from fire, heat sources, and flammable or explosive materials. - Handle with care
Handle the separator gently during transportation to avoid severe collision and extrusion. - Protect from elements
Protect the separator from direct sunlight, rain, and fire baking during shipping and handling.
What causes the large anisotropy in thermal shrinkage between MD and TD in the Atomfair 20μm dry-process PP separator?
The dry-process uniaxial orientation inherent to this PP separator results in a longitudinal thermal shrinkage (MD) of 1.1%, which is eleven times higher than the transverse shrinkage (TD) of 0.1%. This anisotropy must be accounted for during cell stacking and thermal processing to prevent electrode misalignment or internal short circuits after exposure to elevated temperatures.
Can the Atomfair 20μm dry-process PP separator be used interchangeably with wet-process PE separators in lithium-ion battery formulations?
No, direct substitution is not recommended because the dry-process PP separator has a melting temperature of 167°C versus about 135°C for wet-process PE, altering shutdown behavior and thermal runaway response. Additionally, the PP separator exhibits much lower transverse tensile strength (20 kg/cm³ compared to >150 kg/cm³ for 20μm PE) and higher air permeability (355 S versus 224 S for 20μm PE), which impact mechanical integrity during winding and ionic conductivity.
What storage conditions are required to maintain the low thermal shrinkage properties of the Atomfair 20μm dry-process PP separator?
The separator must be stored sealed in a dry, well-ventilated environment at normal or low temperature, away from fire, heat sources, and flammable materials. During transportation, avoid direct sunlight, rain, and severe mechanical collision or extrusion to prevent environmental degradation that could alter the specified low shrinkage values of 1.1% MD and 0.1% TD.
This 20μm dry-process PP separator offers low thermal shrinkage and high melting temperature for stable battery research, but its narrow width and short length constrain it to small-format experimental cells, and it demands careful storage and handling to preserve integrity.
Positive
- Low thermal shrinkage: Longitudinal MD thermal shrinkage only 1.1% and transverse TD 0.1% at elevated temperatures, ensuring dimensional stability during battery assembly and operation.
- High melting point: Melting temperature of 167°C provides a wide thermal operating window, enhancing safety against thermal runaway.
Trade-offs
- Storage and handling sensitivity: Requires sealed, dry, low-temperature storage away from ignition sources, and must be handled carefully to avoid mechanical damage from collision or extrusion.
- Limited experimental format: Supplied as a 60mm wide, 10m long roll, suitable only for small-scale experimental cells and not for production-scale winding.
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 for completely unopened items).
