Automotive HVAC Systems: Low-Odor Material Selection for Interior Air Seals.

Automotive HVAC Systems: Low-Odor Material Selection for Interior Air Seals

Problem Statement

Automotive HVAC seals require materials with low odor emission to maintain cabin air quality. Traditional EPDM compounds often emit volatile organic compounds (VOCs) when exposed to elevated temperatures (up to 120°C). This compromises passenger comfort and fails stringent OEM odor testing protocols.

Material Science Analysis

EPDM emits VOCs due to residual processing oils and sulfur-based curing agents. RubberQ's low-odor EPDM formulation eliminates these components. We replace sulfur with peroxide curing systems and use high-purity polymers with minimal residual monomers. This reduces VOC emissions by 85% compared to standard EPDM.

Technical Specs

• Shore A Hardness: 70 ± 5
• Tensile Strength: 12 MPa
• Elongation at Break: 300%
• Temperature Range: -40°C to 120°C
• Compression Set: 20% (22 hours at 100°C)
• Chemical Resistance: Resistant to coolant, water, and mild detergents

Material Comparison

Material	Low-Odor EPDM	Standard EPDM	Silicone
Shore A Hardness	70 ± 5	70 ± 5	50 ± 5
Tensile Strength (MPa)	12	10	8
Elongation at Break (%)	300	250	400
Temperature Range (°C)	-40 to 120	-40 to 120	-60 to 200
Compression Set (%)	20	25	15
Odor Emission	Low	High	Moderate

Standard Compliance

RubberQ's low-odor EPDM complies with ASTM D2000 for material callouts and ISO 3601 for sealing performance. Our IATF 16949-certified manufacturing process ensures batch-to-batch consistency. We perform VOC testing per OEM-specific protocols to guarantee odor compliance.

CTA

For custom material compound development or IATF 16949 documentation, consult RubberQ's engineering department.