PORON EVExtend® 4701-43
PORON EVExtend® 4701-43 is a high-performance microcellular polyurethane foam available in three density grades — 112 (7), 160 (10), and 192 (12) kg/m³ (lb/ft³) — with compression force deflection ranges of 10.3–31.0 (1.5–4.5), 27–55 (4–8), and 41–83 (6–12) kPa (psi) at 25% deflection. Maximum compression set is 5% at both 23°C (73°F) and 70°C (158°F) across all grades. Recommended constant use temperature is 90°C (194°F), with intermittent use to 121°C (250°F), and embrittlement temperature is -20°C.
Key Properties
- CFD Range, kPa (psi) — Force @ 25% Deflection: 10.3–31.0 (1.5–4.5) / 27–55 (4–8) / 41–83 (6–12) at 4701-43-07 / -10 / -12; 0.51 cm/min strain rate
- Tensile Strength, min. kPa (psi): N/A (4701-43-07, supported product) / 345 (50) (4701-43-10 and -12); ASTM D3574-95 Test E
- Tensile Elongation, % min.: 80; ASTM D3574-95 Test E
- Compression Set, % max. @ 23°C (73°F): 5; ASTM D3574-95 Test D
- Density, kg/m³ (lb/ft³): 112 (7) / 160 (10) / 192 (12) at 4701-43-07 / -10 / -12; ASTM D3574-95, Test A
- Recommended Constant Use Temperature (Max.): 90°C; SAE J-2236
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- Specifications
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Physical Properties
| Property | Value | Test Method |
| Density, kg/m³ (lb/ft³) | 112 (7) / 160 (10) / 192 (12) at 4701-43-07 / -10 / -12 | ASTM D3574-95, Test A |
| Support Type | PET (4701-43-07) / PET or Release PET (4701-43-10 and -12) | — |
| Density Tolerance, % | ± 15 (4701-43-07) / ± 10 (4701-43-10 and -12) | — |
| Thickness, mm (inches) | 3.0 (0.118) at 4701-43-07 / 1.0–3.0 (0.039–0.118) at 4701-43-10 and -12 | — |
| Thickness Tolerance, % (≥ 2mm) | ± 10 (4701-43-07) / ± 5 (4701-43-10 and -12) | — |
| Thickness Tolerance, % (< 2mm) | ± 7.5 (4701-43-10 and -12) | — |
| Standard Color (Code) | Black (04) | — |
Compression Force Deflection
| Property | Value | Test Method |
| CFD Range, kPa (psi) — Force @ 25% Deflection | 10.3–31.0 (1.5–4.5) / 27–55 (4–8) / 41–83 (6–12) at -07 / -10 / -12 | 0.51 cm/min strain rate |
| Typical Force @ 10% Deflection | 18.6 (2.7) / 32.8 (4.8) / 43.4 (7.3) at -07 / -10 / -12 | — |
| Typical Force @ 20% Deflection | 20.9 (3.0) / 36.6 (5.4) / 56.5 (8.6) at -07 / -10 / -12 | — |
| Typical Force @ 25% Deflection | 21.3 (3.1) / 39.1 (5.8) / 61.1 (9.3) at -07 / -10 / -12 | — |
| Typical Force @ 30% Deflection | 22.1 (3.2) / 42.1 (6.3) / 66.3 (10.2) at -07 / -10 / -12 | — |
| Typical Force @ 40% Deflection | 25.2 (3.6) / 50.9 (7.7) / 81.5 (12.5) at -07 / -10 / -12 | — |
| Typical Force @ 50% Deflection | 30.5 (4.4) / 66.1 (10.0) / 108.0 (16.6) at -07 / -10 / -12 | — |
| Typical Force @ 60% Deflection | 41.4 (6.0) / 97.9 (15.0) / 162.0 (25.2) at -07 / -10 / -12 | — |
| Typical Force @ 70% Deflection | 68.9 (10.0) / 181.0 (27.8) / 306.0 (47.6) at -07 / -10 / -12 | — |
| Typical Force @ 80% Deflection | 169.3 (24.6) / 450.0 (69.2) / 728.0 (115.0) at -07 / -10 / -12 | — |
Mechanical Properties
| Property | Value | Test Method |
| Compression Set, % max. @ 23°C (73°F) | 5 | ASTM D3574-95 Test D |
| Compression Set, % max. @ 70°C (158°F) | 5 | ASTM D3574-95 Test D |
| Tensile Strength, min. kPa (psi) | N/A (4701-43-07, supported product) / 345 (50) at 4701-43-10 and -12 | ASTM D3574-95 Test E |
| Tensile Elongation, % min. | 80 | ASTM D3574-95 Test E |
| Tear Strength, kN/m (pli) min. | 1.23 (7) | ASTM D264-91 Die C |
Electrical & Thermal Properties
| Property | Value | Test Method |
| Thermal Conductivity, W/M-°C (BTU-in./hr/ft²-°F) | 0.044 (4701-43-07) / 0.050 (0.35) (4701-43-10) / 0.052 (0.36) (4701-43-12) | ASTM C518-98 |
| Dielectric Strength, volts/mil | 128 (4701-43-07) / 56 (4701-43-10 and -12) | ASTM D150 @ 22°C (72°F), 50% RH, 24 hrs |
Thermal Properties
| Property | Value | Test Method |
| Recommended Constant Use, max. | 90°C | SAE J-2236 |
| Recommended Intermittent Use, max. | 121°C | — |
| Embrittlement | -20°C | ASTM D746-98 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flammability, mm (inches) (Pass ≥) | 1.0 (0.039) at 4701-43-10 and -12 (PET support type only) | UL 94HBF (File E20305) |
Outgassing
| Property | Value | Test Method |
| Outgassing, Total Mass Loss (TML) % | 0.72 / 0.73 / 0.66 at 4701-43-07 / -10 / -12 | Internal Method: 24 hrs @ 125°C (257°F) |
| Outgassing, Water Vapor Regain (WVR) % | 0.59 / 0.62 / 0.51 at 4701-43-07 / -10 / -12 | — |
Environmental Performance
| Property | Value | Test Method |
| Water Absorption, Immersion Testing — % Weight Gain, Typical | 20 | ASTM D570-95 |
| Water Absorption, High Humidity Exposure — % Weight Gain, Typical | 2 | AMS 3568 |
Compliance
- UL 94 HBF — Compliant (File E20305; applies to 4701-43-10 and 4701-43-12 grades, PET support type only, at ≥ 1.0 mm / 0.039 in)
- EV battery pack cushioning and sealing requiring long-term compression set resistance across a broad temperature range
- Electronic enclosure and device cushioning where consistent CFD across the full deflection range is required
- Vibration dampening components in automotive and electronics assemblies
- Long-term compression-loaded gaskets and seals in energy management applications
- Gasketing and sealing for sensitive equipment requiring low outgassing characteristics
Common industries: electric vehicles, automotive, electronics, industrial manufacturing.
PORON EVExtend® 4701-43 is a microcellular polyurethane foam engineered for demanding sealing, cushioning, and energy-management applications, including EV battery pack sealing and long-term compression-loaded seals.
Available in three density grades — 4701-43-07 (112 kg/m³), 4701-43-10 (160 kg/m³), and 4701-43-12 (192 kg/m³) — the 43 Series is characterized by consistent compression force deflection across the full deflection range, with typical CFD values documented from 10% through 80% deflection on the TDS. All grades are supplied with PET support film; the 4701-43-10 and -12 grades are also available with Release PET.
Maximum compression set of 5% at both 23°C (73°F) and 70°C (158°F) supports long-term sealing performance under sustained compressive load. Tear strength minimum is 1.23 kN/m (7 pli). Thermal conductivity ranges from 0.044 W/M-°C (4701-43-07) to 0.052 W/M-°C (0.36 BTU-in./hr/ft²-°F) for the 4701-43-12 grade. Dielectric strength is 128 volts/mil for the 4701-43-07 grade and 56 volts/mil for the -10 and -12 grades.
UL 94 HBF compliance (File E20305) applies to the 4701-43-10 and -12 grades at a minimum thickness of 1.0 mm (0.039 in); the 4701-43-07 grade has no flammability listing on the TDS. Outgassing TML is 0.72%, 0.73%, and 0.66% for the -07, -10, and -12 grades respectively.
Compliant with UL 94 HBF (File E20305) for the 4701-43-10 and 4701-43-12 grades at ≥ 1.0 mm (0.039 in) PET support type only.
What differentiates PORON EVExtend® 4701-43 from other PORON® foam grades?
PORON EVExtend® 4701-43 is engineered specifically for demanding energy-management and long-term compression-loaded sealing applications, including EV battery packs. Its defining characteristic is consistent compression force deflection across the full deflection range — with typical values documented from 10% through 80% deflection — combined with a 5% maximum compression set at both 23°C and 70°C, supporting reliable long-term sealing performance.
Why is compression set critical for this material?
In long-term compression-loaded seals — such as those used in EV battery packs — the foam must maintain sealing force over the service life of the assembly without permanently deforming. PORON EVExtend® 4701-43 limits compression set to 5% maximum at both 23°C (73°F) and 70°C (158°F), ensuring the material continues to exert contact pressure after prolonged loading at elevated temperatures.
What is the service temperature range for PORON EVExtend® 4701-43?
Recommended constant use temperature is 90°C (194°F) maximum per SAE J-2236, with intermittent use to 121°C (250°F). Embrittlement temperature is -20°C per ASTM D746-98.
Is PORON EVExtend® 4701-43 suitable for flame-rated environments?
UL 94 HBF compliance (File E20305) applies to the 4701-43-10 and 4701-43-12 grades only, at a minimum thickness of 1.0 mm (0.039 in) and only with the PET support type. No flammability rating is listed on the TDS for the 4701-43-07 grade.
How should PORON EVExtend® 4701-43 be specified?
Specify grade (PORON EVExtend® 4701-43), density sub-grade (-07, -10, or -12), support type (PET or Release PET where applicable), thickness, compliance requirements, dimensional tolerances, and finished format.
