What are the characteristics of the 5 common plastic materials used in connectors?

8 月 18, 2023 CONNECTOR

Connectors are made from various materials, and different materials are suitable for different applications. Whether in procurement or when using connectors, we need to consider their materials.

In this article, let’s take a look at the characteristics of the commonly used plastic materials in connectors:


Nylon possesses good toughness, self-lubrication, chemical resistance, and wear resistance. PA6T exhibits excellent weldability, dimensional stability, minimal warping during the molding process, and good thin-wall molding capability, making it suitable for processing small components. PA9T generates fewer gas emissions compared to other nylon resins, resulting in less contamination and corrosion of molds, thereby extending the mold’s lifespan. It maintains mechanical strength and rigidity relatively well in high-temperature environments and exhibits good solder joint strength and recyclability.


PPS exhibits good rigidity, low water absorption, excellent dimensional stability, and outstanding thermal performance. It can withstand temperatures up to 260°C in the short term and can be used continuously at temperatures ranging from 200°C to 240°C. PPS has excellent electrical properties, with low dielectric constant and dielectric loss tangent compared to other engineering plastics, making it commonly used as electrical insulation material. However, PPS has a slow crystallization speed, which may result in product flash and relatively poor toughness.


 LCP offers excellent electrical insulation performance and can maintain its electrical properties from 200°C to 300°C. It exhibits strong corrosion resistance and is not affected by 90% acidity or 50% alkaline environments. LCP also demonstrates outstanding thermal stability, heat resistance, and chemical resistance. However, the use of LCP in connector products tends to be more expensive due to its high material cost.


PBT has low viscosity and good flowability in its molten state. It has low moisture absorption and maintains good electrical stability under humid and high-temperature conditions. However, PBT exhibits significant post-molding shrinkage and relatively lower heat resistance, making it unsuitable for SMT (Surface Mount Technology) but suitable for DIP (Dual In-line Package) connectors.


 PET is a crystalline engineering plastic with a melting point of 245-260°C. It offers good mechanical and electrical properties, as well as solvent resistance. However, PET has some drawbacks, including anisotropy, significant shrinkage, slow crystallization speed, and a requirement for thorough drying.

These are the characteristics of the five commonly used plastic materials in connectors.


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