At present, as far as Shenzhen is concerned, there are more and more new energy vehicles, which are environmentally friendly and energy-saving. You can see it everywhere when you walk on the road, such as BYD, Tesla and other brand models. However, in the production process of new energy vehicles, there is one auto part that is used more, that is, the high-voltage connector of the car, in the car connector In the production of injection molded parts, there is always a need to use plastic materials. This article will introduce what plastic materials are commonly used in the production of automotive connectors? What requirements do these materials need to meet for automotive connector products? As far as the material is concerned, the plastic raw materials commonly used in connectors are mainly PBT, 66, 6T, 9T, LCP, etc., and these materials are different in quality, temperature resistance and price. Of course, these differences are also It will be reflected in the connector price.
1. PBT plastic material
PBT plastic materials are often used in the production of 2.54-degree 180-degree/90-degree female header connectors. The welding resistance of the plastic terminal shell is only about 200 degrees. Due to its low cost, high strength, and friction resistance compared to other materials , Now this material still has many customer choices. However, the use of this material has poor formability and serious shrinkage. Due to the low melting temperature, plastic melting will occur during wave soldering.
2. Nylon-66
A thermoplastic resin, white solid, density 1.14, melting point 253°C, insoluble in common solvents, only soluble in m-cresol, etc. High mechanical strength and hardness, high rigidity, can be used as engineering plastics. Rockwell hardness 108-118, heat distortion temperature (1814.11 Pa, 18.5 kgf/cm2) 66-86 ℃. Used as mechanical accessories, such as gears, lubricating bearings; instead of non-ferrous metal materials as machine casings, car engine blades, etc. It can also be used to make synthetic fibers.
3. 6T plastic material
According to automotive connector manufacturers, this material is generally used on 2.54-pitch patch headers and 1.27-pitch/2.0-pitch series headers. The soldering resistance temperature is between 260 degrees and 290 degrees, so the cost of the female header connector produced by this material is slightly higher. The choice of this material is generally based on the quality requirements of customers on the product.
4. 9T plastic material
The connector products that will use this type of material are mostly 2.54-pitch SMD female headers, and 1.27-pitch/2.0-pitch series female headers. The welding resistance temperature is around 260-300 degrees. Due to the high price of this material, 9T plastic materials are generally used to produce connector products only if customers have special needs.
5. LCP plastic material
It is suitable for the production of female bus connector products of various spacing series, and the welding resistance temperature is between 260 degrees and 320 degrees. This material has a small linear expansion coefficient, low injection molding shrinkage, good strength and elastic modulus, excellent heat resistance, high load deformation temperature, and excellent chemical resistance and air tightness. Those who need SMT prefer to choose LCP material.
However, correspondingly, the price of using this kind of material to make connector products will be higher, because the price of the material itself is expensive, and it also needs to cooperate with the process of the manufacturer of automobile connector products, so the use of this material is generally only for special customers. have this requirement.