Introduction
Acrylic Rubber (ACM, ANM) is a high-performance elastomer known for its exceptional oil resistance and ability to withstand high temperatures. As an acrylic ester copolymer, it offers superior stability in automotive, aerospace, and industrial applications where exposure to hot oils, fuels, and lubricants is common.
In this article, we explore the benefits of Acrylic Rubber micro-molding, critical design guidelines, and the best applications for high-precision, heat-resistant sealing solutions.
Why Use Acrylic Rubber for Micro-Molding?
Excellent High-Temperature Oil & Fuel Resistance
- Performs well up to 180°C (356°F), far exceeding Nitrile (NBR) and Natural Rubber.
- Ideal for automotive transmission seals, aerospace fuel system gaskets, and industrial lubricated components.
Superior Heat & Oxidation Stability
- Resists thermal degradation better than EPDM and SBR.
- Used in long-life gaskets and seals for extreme temperature environments.
Good Chemical & Weather Resistance
- Handles exposure to synthetic oils, hydraulic fluids, and oxidizing agents.
- More ozone- and UV-resistant than NBR and SBR, though slightly below EPDM.
Strong Mechanical Strength & Aging Resistance
- Maintains elasticity and flexibility in high-stress, high-heat environments.
- Outlasts SBR and Natural Rubber in continuous-use applications.
Design Guidelines for Acrylic Rubber Micro-Molding
1. Optimize Wall Thickness & Uniformity
- Recommended thickness: 0.4mm – 1.5mm for micro-seals and gaskets.
- Avoid thick sections to prevent uneven curing or shrinkage.
2. Maintain Tight Tolerances
- Standard tolerance: ±0.020mm for high-precision ACM parts.
- Compensate for slight shrinkage (~1-2%) during mold design.
3. Surface Finish Considerations
- Smooth finishes → Best for fluid and oil-sealing applications.
- Textured surfaces → Improve adhesion and grip in mechanical systems.
4. Gate & Flow Optimization
- Small, well-placed gates improve flow in thin-walled micro-molded ACM parts.
- Proper venting prevents defects in high-precision sealing applications.
Applications of Acrylic Rubber Micro-Molding in High-Temperature Seals & Components
- Aerospace & Defense – High-temperature fuel seals, jet engine gaskets, and oil-resistant dampers.
- Automotive & Powertrain – Transmission seals, turbocharger gaskets, and engine oil-resistant O-rings.
- Industrial Equipment – Hydraulic seals, lubricated bearing covers, and high-wear oil-resistant gaskets.
- Heavy Machinery & Marine – Heat-resistant vibration isolators and fuel system sealing solutions.
Acrylic Rubber (ACM, ANM) micro-molding is the go-to solution for high-precision, high-temperature oil-resistant seals and components. With its outstanding thermal stability, fuel resistance, and aging durability, ACM is trusted in automotive, aerospace, and industrial applications.
In need of Acrylic Rubber micro-molded parts?
For custom Acrylic Rubber micro-molded components, consult rubber processing specialists to optimize material selection and mold design for your application.
Contact us to learn more.
