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For connectors, especially high-frequency and radio-frequency high precision connector injection, in addition to the excellent design and manufacturing process, another key factor that determines the quality of the product is the quality of its manufacturing materials. Special engineering plastics have the greatest use in connector applications. The advantage is insulation.

Usually the connectors are small, with a typical diameter between 3mm and 10mm. It requires excellent insulation properties and superb machinability, dimensional stability. At the same time, the smaller the dielectric loss, the better, so the dielectric constant of the plastic must be low. Taking all these factors into consideration, the most commonly used specialty plastic materials in connector applications are PEEK and PEI, which have the following advantages:

- Good electrification performance

PEEK and PEI have relatively low dielectric constants of 3.0 and 3.15 at 1kHz, respectively. The electrical properties radio-frequency high precision connector injection make the dielectric loss smaller.

- Good mechanical properties

The tensile strength, compressive strength and flexural strength of these two materials are all above 100Mpa. Moreover, the long-term working temperatures of PEEK and PEI are 260°C and 170°C, respectively. High thermal stability also enables the material to cope with working conditions of good quality.

In addition to the above two materials, other engineering plastics can also be used in the connector

PPS: polyphenylene sulfide

This kind of plastic has high service temperature, good mechanical strength and excellent insulation performance. But the dielectric constant is relatively higher than PEEK and PEI. So PPS is suitable for the housing of the、 radio-frequency high precision connector injection.

PTFE: polytetrafluoroethylene

This material exhibits a lower dielectric constant of 2.1 at 1kHz. But the mechanical properties are relatively low. PTFE is "softer" than other plastics when processed.

- Good insulation

Plastics only require good insulation for non-high frequency connectors. So literally any material that can meet the temperature and insulation needs is suitable, and in this high precision connector injection project these two leading plastics were used.

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