Glass Fiber Reinforced High/Low Temperature Resistant PPA
Overview
Glass fiber reinforced high-temperature and low-temperature resistant PPA is a specialized polyphthalamide (PPA) composite enhanced with glass fibers to improve its mechanical and thermal properties. This engineering plastic is designed to perform reliably in extreme temperature conditions, making it ideal for demanding industrial and automotive applications. The addition of glass fibers significantly increases the material's tensile strength and dimensional stability. PPA resins are semi-aromatic polyamides known for their high heat resistance and excellent chemical resistance. When reinforced with glass fibers, these properties are further enhanced, allowing the material to maintain its structural integrity in environments ranging from -40°C to 150°C or higher, depending on the specific formulation.
Physical and Chemical Properties
The physical properties of glass fiber reinforced PPA include a high tensile strength (typically 150-200 MPa) and a flexural modulus that can exceed 10,000 MPa, depending on the glass fiber content. The material exhibits low moisture absorption, which helps maintain dimensional stability in humid environments. Its thermal properties include a heat deflection temperature (HDT) of up to 280°C at 1.82 MPa. Chemically, this PPA variant is resistant to oils, fuels, and many solvents, making it suitable for automotive under-the-hood applications. It also demonstrates good resistance to hydrolysis and stress cracking. The glass fiber reinforcement contributes to reduced thermal expansion and improved creep resistance compared to unfilled PPA.
Main Applications
The primary application areas for this material are in the automotive and electronics industries. In automotive applications, it is used for components such as fuel system parts, sensor housings, and transmission components that require both thermal stability and chemical resistance. The material's ability to withstand under-the-hood temperatures makes it valuable for engine compartment applications. In electronics, glass fiber reinforced PPA is used for connectors, sockets, and other components that require dimensional stability under thermal cycling. Industrial applications include pump components, valve bodies, and bearing cages where the combination of mechanical strength and chemical resistance is critical. The aerospace industry also utilizes this material for certain non-structural components.
Safety and Storage
While glass fiber reinforced PPA is generally safe to handle, standard precautions should be taken when processing the material. During injection molding or machining, adequate ventilation should be maintained to prevent inhalation of any airborne particles. Proper personal protective equipment, including gloves and safety glasses, should be worn when handling the material in pellet or dust form. For storage, the material should be kept in its original packaging in a dry environment with temperatures below 40°C. Moisture-sensitive applications may require drying the material before processing, typically at 120°C for 4-6 hours. Long-term storage should be avoided as the material may absorb moisture from the atmosphere, which can affect processing and final part properties.
B2B Procurement Guide
When procuring glass fiber reinforced PPA, buyers should specify the required glass fiber content, which typically ranges from 30% to 50% by weight. Higher fiber content increases mechanical properties but may reduce impact strength. Key specifications to verify include the heat deflection temperature, tensile strength, and any required industry certifications such as UL ratings or automotive OEM approvals. Suppliers should provide material data sheets with complete property profiles and processing guidelines. For critical applications, consider requesting samples for testing before large-scale procurement. Lead times can vary depending on the specific formulation, with standard grades typically having shorter lead times than custom formulations. Pricing is influenced by raw material costs, with volume discounts often available for larger orders.
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