Staining of Plastics: Avoiding Migration of Rubber Chemicals to Adjacent Parts.

Staining of Plastics: Avoiding Migration of Rubber Chemicals to Adjacent Parts

Problem Statement

Rubber compounds often migrate plasticizers, curing agents, or antioxidants to adjacent plastic components, causing staining and functional degradation. This issue occurs in high-temperature environments (>100°C) or prolonged contact scenarios.

Material Science Analysis

Migration occurs due to low molecular weight additives in rubber compounds. These additives diffuse into plastics, altering their surface properties. Fluorocarbon elastomers (FKM) minimize migration due to their high fluorine content and stable molecular structure. EPDM, while cost-effective, often requires careful additive selection to prevent staining.

Technical Specs

• Material: FKM (Fluorocarbon Elastomer)
• Shore A Hardness: 70 ± 5
• Tensile Strength: 15 MPa
• Elongation at Break: 200%
• Temperature Range: -20°C to 200°C
• Compression Set: 15% (22 hours at 200°C)
• Chemical Resistance: Resistant to oils, fuels, and acids

Material	Migration Resistance	Temperature Range (°C)	Compression Set (%)	Chemical Resistance
FKM	High	-20 to 200	15	Excellent
EPDM	Moderate	-40 to 150	20	Good
NBR	Low	-30 to 120	25	Fair

Standard Compliance

RubberQ adheres to IATF 16949 standards, ensuring batch-to-batch consistency in compounding and curing processes. Our materials meet ASTM D2000 specifications for elastomer performance and ISO 3601 for sealing applications. Rigorous testing ensures zero migration in high-temperature environments.

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