Overview
PA+PPO alloy is an engineered thermoplastic blend that synergizes the strengths of polyamide (PA) and polyphenylene oxide (PPO). Developed to overcome the limitations of the individual polymers, this material exhibits superior dimensional stability compared to pure PA while offering better processability than neat PPO. The blend typically contains 30-70% PA (often PA6 or PA66) compounded with PPO and compatibilizers. This combination creates a material with balanced properties that outperforms many standard engineering plastics, particularly in applications requiring both mechanical robustness and thermal resistance.
Physical and Chemical Properties
The PA+PPO alloy demonstrates a unique combination of properties: tensile strength ranging from 50-80 MPa, heat deflection temperatures (HDT) of 180-220°C at 1.82 MPa, and low linear thermal expansion. The material maintains good impact strength down to -30°C, outperforming many unfilled engineering plastics. Chemically, it shows excellent resistance to automotive fluids, weak acids, and alkalis. The water absorption rate is significantly lower than pure PA (approximately 1-2% at saturation), reducing dimensional changes in humid environments. Electrical properties include a dielectric strength of 20-25 kV/mm and volume resistivity >10¹⁵ Ω·cm.
Main Applications
In the automotive sector, PA+PPO is widely used for under-hood components such as radiator end tanks, intake manifolds, and electrical connectors that must withstand engine compartment temperatures. The material's combination of heat resistance and dimensional stability makes it ideal for these applications. The electronics industry utilizes this alloy for power tool housings, circuit breaker components, and LED lighting parts where flame retardancy (often UL94 V-0 rated) and good dielectric properties are required. Industrial applications include pump housings, gear wheels, and conveyor system components that demand wear resistance and durability.
Safety and Storage
PA+PPO alloy pellets are generally stable and non-hazardous under normal conditions. However, proper handling during processing is essential - melt temperatures typically range between 260-300°C, requiring adequate ventilation to avoid exposure to thermal decomposition products. Storage recommendations include keeping the material in its original packaging until use, maintaining relative humidity below 50%, and avoiding prolonged exposure to temperatures above 40°C. For critical applications, pre-drying at 80-100°C for 2-4 hours is often necessary to prevent processing defects caused by moisture absorption.
B2B Procurement Guide
When procuring PA+PPO alloy, specify the required mechanical properties (tensile strength, impact resistance), thermal characteristics (HDT, continuous use temperature), and any special requirements such as UV stabilization or color consistency. Technical datasheets should include rheological properties for injection molding grades. Leading manufacturers include BASF, SABIC, and Mitsubishi Engineering-Plastics, each offering proprietary formulations. Bulk purchases (pallet quantities or more) typically offer 10-20% cost savings. Consider lead times of 4-8 weeks for custom formulations. For prototyping, many suppliers provide small-quantity sample kits with various grades.
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