Flat PP partition series
Meltblown polypropylene battery separators (PP separators) are suitable for low-end and inexpensive automotive and motorcycle batteries; PP separators come in various forms and can be processed into flat and ribbed separators of various sizes and specifications.
Classification:
PP separator series
产品描述
PP Separator Series
Meltblown polypropylene battery separators (PP separators) are suitable for low-grade and inexpensive automotive and motorcycle batteries; PP separators come in various forms and can be processed into flat and ribbed separators of various sizes and specifications.

Ribbed PP Separator Series
In order to solve the problem of stiffness in PP separators, ribbed PP separators have emerged to improve their electrical performance and stiffness. Furthermore, to protect the anode plates in lead-acid batteries, prevent lead powder shedding and improve shock resistance, bagged PP separators have been developed.
Technical Indicators
| Item | Unit | Parameter | ||
| Base Thickness | mm | ≤0.50 | 0.50~0.80 | >0.80 |
| Total Thickness | mm | (0.80~1.30)±0.05 | ||
| Resistance | Ω.dm 2 | ≤0.0010 | ≤0.0015 | ≤0.0020 |
| CMD Elongation | % | ≥300 | ||
| Porosity | % | ≤65 | ||
| Maximum Pore Size | μm | ≤36 | ||
| Dimensional Stability | % | ≤1.0 | ||
| Wettability | s | ≤5.0 | ||
| Acid Immersion Weight Loss | % | ≤4.0 | ||
| Water Content | % | ≤4.0 | ||
| Iron Content | % | ≤0.010 | ||
| Chlorine Content | % | ≤0.030 | ||
| Reducing Potassium Permanganate Substance | Ml/g | ≤15 | ||
| Foamability | / | Bubbles (foam) cannot completely cover the surface of the sulfuric acid solution | ||
| Layering | / | No layering gaps | ||
Application of PP Separators in Starting Batteries and Existing Problems
The biggest problem with PP separators is their lack of oxidation resistance:
①The surface area of the ultrafine fibers in the raw materials is larger, making them more susceptible to thermal aging;
②High-temperature processing leads to the loss of antioxidants;
③The washing process also promotes the aging of the separator.
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