1 When to start the selection of plastic materials
The selection of plastic materials must be decided at the beginning of product design, because the performance differences of plastic materials may cause completely different designs of plastic parts, including differences in wall thickness, rib thickness, screw matching hole size, and assembly process selection. In addition, the different shrinkage rates of plastic materials also make the same set of injection molds process different plastics with different sizes. Once the injection mold begins processing, the possibility of changing plastic materials becomes very small, or the cost of replacement will be very high. Therefore, you must not wait until the product is molded and the test finds that there is a problem with the material selection before reselecting and changing the plastic material. The plastic material must be decided at the beginning of product design.
2 Steps for selecting plastic materials
The steps for selecting plastic materials include four steps. Through the following four steps, you can select the most suitable plastic material. Step 1: Clarify the application environment of the product What is the specific application location of the product? How long is the service life requirement? Mechanical load requirements of the application environment? Chemical requirements of the application environment? Appearance and performance requirements of the product? Economic requirements of the product? Step 2: Understand the performance of plastic materials. There are many performance parameters of plastic materials. Before selecting specific plastic materials according to the application environment of the product, it is necessary to have a detailed understanding of the performance parameters of multiple plastic materials.
3.Choosing the type of plastic material
Once you have a deep understanding of the product's application environment and the performance of the plastic material, you can narrow down your choices to a specific type of plastic material.
4.：Select a specific plastic material model
Obtain the performance parameter table of specific plastic materials from different suppliers of the plastic race through the plastic material performance database such as UL IDES, and select the most suitable plastic material from them.
