SPOT COATING
Regular non-continuous point-coated separator configurations with controllable dot geometry and coverage.
Functional point-coating selection begins with the cell architecture, coating chemistry, dot geometry and process priorities.
SOURCE-DOCUMENTED PROFILE
The supplied literature defines spot coating by uniform arrangement and controllable point diameter, spacing and coverage, then compares roller and array-spray application modes.
Technical content reproduced from the supplied spot-coated separator literature, pages 11–12.Uniform coating with a regular spot arrangement
Controllable point diameter, spacing and coverage
Uniform impedance, stable interface and strong adhesion
APPLICATION PROCESSES
The source separates these methods by equipment, changeover, speed, impedance and film-flatness requirements.
A transformable roll-based process with flexible changeover and a high surface-flatness requirement.
A controlled array process with higher equipment and process requirements and greater flatness tolerance.
PHYSICAL PROPERTIES
Four published constructions retain their original C/P structure codes. The supplied pages do not define those abbreviations, so no expanded meaning is added here.
Compare all 4 published configurations
| Test item | Dir. | 5 μm base5+1C+1P | 7 μm base7+1C+1P | 9 μm base9+3C+2P | 16 μm base16+2P |
|---|---|---|---|---|---|
| Finished thicknessμm | — | 7±1 | 9±1 | 14±1.5 | 18±1.5 |
| Air permeabilitysec/100 cc | — | 180±40 | 180±40 | 200±40 | 220±40 |
| Tensile strengthMPa | TD | ≥140 | ≥140 | ≥120 | ≥140 |
| Tensile strengthMPa | MD | ≥140 | ≥140 | ≥120 | ≥160 |
| Puncture strengthgf | — | ≥500 | ≥450 | ≥500 | ≥600 |
| Heat shrinkage105°C · % | TD | ≤2 | ≤2 | ≤2 | ≤2 |
| Heat shrinkage105°C · % | MD | ≤2 | ≤2 | ≤2 | ≤2 |
| Heat shrinkage130°C · % | TD | / | / | ≤3 | / |
| Heat shrinkage130°C · % | MD | / | / | ≤3 | / |
| Total PVDF coating weightg/m² | — | 0.4±0.1 | 0.4±0.1 | 0.6±0.2 | 0.6±0.2 |
The “/” marks are reproduced from the source table; no missing 130°C value is inferred.
The source notes that spot-coating materials can include water-based PVDF, oil-based PVDF and PMMA.
QUALIFICATION CONTEXT
Published matrices support initial comparison. Final specifications remain tied to the selected grade, agreed test method and lot-specific quality documentation.
Send the target thickness, width, coating requirements and volume for a project quotation, typically expressed in USD per square metre.
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