Changzhou Junhua Company Technical Data: PI Characteristics and Advantages

Overview of PEEK and PI materials and their characteristics, advantages and disadvantages

1. Material Overview

PEEK and PI are high-performance materials synthesized and patented by Victrex of the United Kingdom and DuPont of the United States respectively. PEEK and PI have excellent comprehensive properties that other general plastics cannot match in high-performance polymers. They have excellent performance suitable for various harsh environments and have been successfully and widely used in various industries such as aerospace, automobiles, electronic semiconductors, electromechanical and other demanding occasions. It is the preferred material for users to develop new products and improve product service life and reliability.

II. Characteristics and Advantages

◆ High temperature resistance

The long-term use temperature of the US UL certification is 260℃. Even when the temperature reaches 300℃, it can still maintain excellent mechanical properties

◆ Wear resistance

In many extremely harsh application environments such as high temperature, high load, and strong corrosion, PEEK polymers and their composite materials have good wear resistance.

◆ Self-lubrication

It has a low friction coefficient and can achieve oil-free lubrication. It can work for a long time in oil, water, steam, weak acid and alkali and other media.

◆ Corrosion resistance

It is insoluble in common solvents and has good corrosion resistance to various organic and inorganic chemical reagents.

◆ High strength

It has good mechanical strength among plastics. It also has high rigidity and surface hardness.

◆ Easy processing

Parts can be directly processed by injection molding. It can be post-processed by turning, milling, drilling, tapping, bonding and ultrasonic welding.

◆ Hydrolysis resistance

PEEK products can still work continuously for thousands of hours without obvious performance degradation in steam over 250℃ or soaked in high-pressure water.

◆ Flame retardancy

Without any additives, the flammability rating of the 1.45mm thick PEEK sample is UL94 V-0.

◆ Low smoke and non-toxic

The amount of smoke and toxic gas during combustion is particularly low.

◆ Electrical properties

Stable and excellent electrical properties can be maintained over a wide range of temperature and frequency.

◆ Radiation resistance

It has extremely strong resistance to high-dose gamma-ray radiation, and its mechanical properties can be fully retained, so it can be used as radiation-resistant parts in nuclear equipment.

◆ Dimensionally stable

Disadvantages

■ The injection process is harsh and the machining process requires high requirements.

■ The strength is somewhat lower than that of metal materials.