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Waterproof PP Closed Cell Foam Lightweight Polypropylene Foam For EV Battery Insulation
Product Details:
| Place of Origin: | Guangdong, China |
| Brand Name: | EKKOFLEX |
| Certification: | ISO 9001:2015, RoHS, REACH |
Payment & Shipping Terms:
| Minimum Order Quantity: | 3000Square Meters |
|---|---|
| Price: | USD 1.2-4.5 / Square Meter |
| Packaging Details: | PE film wrapped rolls with protective end caps |
| Delivery Time: | 7-10 working days for stock, 15-25 days for production |
| Payment Terms: | T/T,L/C,PayPal |
| Supply Ability: | 500000 Square Meters per Month |
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Detail Information |
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| Material: | PP (Polypropylene) Closed Cell Foam | Foam Structure: | Closed Cell (Closed-Cell Rate >98%) |
|---|---|---|---|
| Water Absorption: | ≤2% (GB/T1034) | Water Vapor Permeability: | Low |
| Thermal Conductivity: | ≤0.034 W/m·K | Temperature Resistance: | -40°C To +130°C (Continuous Service Up To 120°C) |
| Flame Retardant Grade: | UL 94 V-0 (Optional) | Dielectric Strength: | High, Suitable For Electrical Insulation |
| Density Range: | 33-200 Kg/m³ | Thickness Range: | 1-6mm Single Layer, Up To 100mm Multilayer |
| Expansion Ratio: | 5-30 Times | Roll Length: | Up To 200m Per Roll |
| Color: | Natural/Flesh, Black, Custom Colors | Application: | EV Battery Insulation, Battery Pack Thermal Management, Cell Spacing And Cushioning, High-Temperature Insulation |
| Compression Set: | ≤10% (typical, 23°C, 24h) | Halogen-Free: | Yes |
| Highlight: | waterproof EV battery insulation foam,closed cell polypropylene foam roll,lightweight PP battery protection foam |
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Product Description
Waterproof PP Closed Cell Foam for EV Battery Insulation
Lightweight Polypropylene Foam — Thermal and Electrical Protection for EV Battery Packs
Product Overview
EKKOFLEX's waterproof PP closed cell foam is a lightweight polypropylene foam specifically engineered for EV battery insulation. Manufactured through advanced irradiation cross-linking technology, the foam achieves a closed-cell rate over 98%, providing reliable thermal insulation, waterproofing and cushioning protection for battery cells and packs.
With thermal conductivity as low as 0.034 W/m·K and stable performance from -40°C to +130°C, this foam effectively manages heat transfer in battery packs while its closed cell structure blocks moisture and water vapor. Lightweight density starting at 33 kg/m³ minimizes added battery weight, and its high dielectric strength makes it suitable as an insulation layer in EV battery assemblies.
Key Features
| NO. | Feature | Benefit |
|---|---|---|
| 1 | Waterproof | Closed-cell rate over 98%, water absorption ≤2%, low water vapor permeability protects battery cells from moisture |
| 2 | Excellent Thermal Insulation | Thermal conductivity as low as 0.034 W/m·K reduces heat transfer between cells and to the pack housing |
| 3 | Lightweight | Density starting at 33 kg/m³ minimizes added weight, supporting EV energy efficiency and range |
| 4 | High-Temperature Resistance | Stable from -40°C to +130°C with dimensional stability tested at 120°C for 1 hour |
| 5 | Electrical Insulation | High dielectric strength provides electrical insulation between cells and conductive components |
| 6 | Cushioning & Vibration Protection | Excellent resilience absorbs shock and vibration during vehicle operation |
| 7 | Easy to Process | Supports die-cutting, lamination, thermoforming and adhesive backing for custom battery insulation parts |
| 8 | High Dielectric Strength | Provides reliable electrical insulation between battery cells and conductive components |
| 9 | Flame Retardant Option | UL 94 V-0 rated grade available for enhanced battery pack fire safety |
| 10 | Halogen-Free & Eco-Friendly | Halogen-free formulation with low VOC emissions, safe for passenger cabin environments |
EV Battery Insulation Advantages
| Advantage | How It Protects the Battery Pack |
|---|---|
| Cell-to-Cell Thermal Barrier | Low thermal conductivity limits heat transfer between adjacent cells, reducing the risk of thermal runaway propagation |
| Swelling Space Absorption | Elastic closed-cell structure accommodates cell swelling during charge and discharge cycles, maintaining stable pack assembly |
| Condensation & Moisture Protection | Waterproof closed-cell structure prevents condensation and moisture ingress that can corrode terminals and connectors |
| Vibration & Shock Damping | Excellent resilience absorbs road vibration and impact, protecting weld points and cell interconnects |
| Fire Safety Enhancement | Optional UL 94 V-0 flame retardant grade delays flame spread in abnormal thermal events |
| Weight Optimization | Ultra-low density reduces pack weight, contributing to higher energy density and driving range |
Technical Specifications
| Property | Specification |
|---|---|
| Material | PP (Polypropylene) Closed Cell Foam |
| Foam Structure | Closed Cell (Closed-Cell Rate >98%) |
| Thermal Conductivity | ≤0.034 W/m·K |
| Temperature Resistance | -40°C to +130°C (continuous service up to 120°C) |
| Water Absorption | ≤2% (GB/T1034) |
| Density Range | 33 - 200 kg/m³ |
| Thickness | 1-6mm single layer; up to 100mm multilayer laminated structure |
| Expansion Ratio | 5 - 30 Times |
| Roll Width | 500 - 1500mm |
| Roll Length | Up to 200m per roll |
| Size Change Rate | ≤5% (120°C, 1h, GB/T8811) |
| Compression Set | ≤10% (typical, 23°C, 24h) |
| Dielectric Strength | High, suitable for electrical insulation layers (typical, confirm per grade) |
| Flame Retardant Grade | UL 94 V-0 (optional) |
| Halogen-Free | Yes |
| Color | Natural/Flesh, Black, Custom Colors |
| Certification | ISO 9001:2015, RoHS, REACH |
IXPP Foam Technical Specification (by Expansion Ratio)
| Test Item | Index | 5 Times | 10 Times | 15 Times | 18 Times | 20 Times | 25 Times | 30 Times | Test Standard |
|---|---|---|---|---|---|---|---|---|---|
| Density (kg/m³) | - | 200±25 | 100±10 | 66±7 | 55±5 | 50±5 | 40±5 | 33.3±3 | GB/T6343 |
| Tensile Strength (MPa) | Transverse | ≥2.5 | ≥1.0 | ≥0.9 | ≥0.7 | ≥0.6 | ≥0.4 | ≥0.2 | GB/T6344 |
| Longitudinal | ≥3.5 | ≥1.5 | ≥1.2 | ≥1.0 | ≥0.9 | ≥0.7 | ≥0.3 | GB/T6344 | |
| Elongation (%) | Transverse | ≥260 | ≥240 | ≥200 | ≥190 | ≥180 | ≥160 | ≥100 | GB/T6344 |
| Longitudinal | ≥320 | ≥270 | ≥260 | ≥230 | ≥220 | ≥210 | ≥200 | GB/T6344 | |
| Tear Strength (kN/m) | Transverse | ≥15 | ≥8 | ≥8 | ≥7 | ≥6 | ≥4 | ≥2 | QB/T1130 |
| Longitudinal | ≥18 | ≥9 | ≥9 | ≥8 | ≥7 | ≥5 | ≥3 | QB/T1130 | |
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Size Change Rate (%, 120°C, 1h) |
Transverse | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | GB/T8811 |
| Longitudinal | ≤-5 | ≤-5 | ≤-5 | ≤-5 | ≤-5 | ≤-5 | ≤-5 | GB/T8811 | |
| Water Absorption (%) | - | ≤2 | ≤4 | ≤4 | ≤4 | ≤4 | ≤5 | ≤5 | GB/T1034 |
Final performance depends on formulation, thickness, color, density, test method and production tolerance. Confirm the target standard and application conditions before bulk production.
Applications
EV Battery Insulation Battery Pack Thermal Management Cell Spacing and Cushioning Battery Module Fire Barrier High-Voltage Component Insulation Thermal Runaway Protection Layer Electric Vehicle Interior Padding
Frequently Asked Questions
Why is PP closed cell foam used for EV battery insulation?
Its closed-cell rate over 98% provides waterproofing and moisture resistance, while low thermal conductivity of 0.034 W/m·K and light weight make it an ideal insulation and cushioning material for EV battery packs.
Is this foam waterproof?
Yes. The closed cell structure gives water absorption of ≤2% and low water vapor permeability, effectively blocking moisture from reaching battery cells.
Can it withstand battery operating temperatures?
Yes. It remains stable from -40°C to +130°C and passes dimensional stability testing at 120°C for 1 hour, covering normal and extreme EV battery operating conditions.
Does it provide electrical insulation?
Yes. The foam offers high dielectric strength, making it suitable as an electrical insulation layer between cells and conductive battery pack components.
Why Choose EKKOFLEX
| 15+ Years Manufacturing Experience | Specialized in cross-linked polyolefin foam production since 2010 |
| ISO Certified Factory | ISO 9001:2015 quality management system with in-house testing laboratory |
| Custom Formulation Available | Tailored density, thickness, color and flame retardant grade to meet battery project specifications |
| Fast Global Shipping | Reliable logistics network covering North America, Europe, Southeast Asia, and Middle East |
