PI material serves as the foundation for achieving high performance in turned parts. Compared to ordinary engineering plastics and even some metals, its exceptional performance in key dimensions such as high temperature resistance, low temperature resistance, mechanical strength, and insulation provides significant competitive advantages.

PI material offers an exceptionally wide temperature resistance range, making it suitable for extreme working conditions:

• Excellent thermal stability with no obvious melting point
• Thermal decomposition temperature exceeding 500℃
• Long-term use temperature range: -200 to 300℃
• Instantaneous use temperature up to 500℃
• Vicat softening point exceeds 270℃
• Excellent load thermal deformation temperature performance

PI material combines high strength, high modulus, and high fracture toughness with lightweight characteristics:

These properties enable turned parts to meet strict structural strength and rigidity requirements while significantly reducing part weight, supporting equipment lightweighting upgrades, and reducing energy consumption and operating loads.

PI material offers multiple durability advantages that reduce maintenance requirements:

• Extremely strong chemical resistance and hydrolysis resistance
• Resistant to corrosion from chemical media, acid-base solutions, and fuel lubricants
• Excellent tribological properties with low friction coefficient
• Outstanding resistance to sliding wear and micro motion wear
• Self-lubricating properties eliminate need for additional lubricants
• Excellent radiation resistance with 90% strength retention after 5×10⁹ rad fast electron irradiation

PI material's crystalline polymer structure provides exceptional dimensional stability for precision applications:

• Linear expansion coefficient: 2×10⁻⁵ to 3×10⁻⁵/℃
• Biphenyl PI can reach 10⁻⁶/℃
• Some varieties can achieve 10⁻⁷/℃
• Excellent thermal stability prevents deformation from temperature changes
• Highly controllable dimensional accuracy

This dimensional stability ensures compatibility with precision turning requirements, meeting strict standards for aerospace, hydraulic control, and precision electronic systems.