PI (Polyimide) is a versatile high-performance polymer with unique properties that make it suitable for various demanding applications. It is broadly categorized into two main types: thermosetting (or thermoset) PI and thermoplastic PI.
Thermosetting PI:
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Properties and Applications: Thermosetting PIs exhibit exceptional long-term temperature resistance, withstanding temperatures up to 350 degrees Celsius (662 degrees Fahrenheit). They possess excellent mechanical strength, chemical resistance, and electrical insulation properties. Due to these attributes, thermosetting PIs are widely used in high-temperature aerospace components, electrical insulation materials, and printed circuit boards (PCBs).
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Cost: Thermosetting PIs are typically more expensive compared to thermoplastic PIs. The price range for thermosetting PIs varies from 9,000 to 15,000 yuan per kilogram (approximately 1,330 to 2,220 US dollars per kilogram) depending on the specific grade and supplier.
Thermoplastic PI:
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Properties and Applications: Thermoplastic PIs offer a combination of high-temperature resistance and thermoplastic processability. They have good mechanical properties, electrical insulation characteristics, and chemical resistance. Thermoplastic PIs are commonly utilized in flexible printed circuit boards (FPCBs), wire and cable insulation, and high-temperature connectors due to their flexibility and solderability.
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Cost: Thermoplastic PIs are generally more economical than thermosetting PIs. The price range for thermoplastic PIs typically falls between 1,000 to 1,350 yuan per kilogram (approximately 148 to 200 US dollars per kilogram), again depending on the grade and supplier.
In summary, both thermosetting and thermoplastic PIs have distinct properties and applications based on their unique characteristics. Thermosetting PIs excel in long-term high-temperature resistance and are used in demanding environments, while thermoplastic PIs offer a balance of temperature resistance and processability, making them suitable for various industrial and consumer applications. The price variation between the two types reflects their different properties and target applications.
