Many different types of materials can be used in the injection molding process. Most polymers could be used. This includes all thermoplastics, but some thermosets and elastomers are possibilities too. When these materials are used, their raw form often is small pellets or a fine powder. Colorants may be added during the process as well. This is done to control the color of the part. Which material is selected does not solely depend on the desired characteristics of the product.
Your budget may affect your selection too, since not all materials are as cheap. In the injection molding quote you will find the price of the material. Below you can find five materials that can be used for injection molding.
Polycarbonate is often abbreviated to PC. It is a very tough material with a good temperature resistance. On top of that, it is transparent and has dimensional stability. A big downside to polycarbonate is its high price. PC is often used in the automotive sector, but it can also be utilized to produce containers, safety helmets, bottles, and more.
Acrylonitrile Butadiene Styrene
Acrylonitrile Butadiene Styrene is also known as ABS, its abbreviation. It is a strong and flexible material with a low mold shrinkage, which essentially means that ABS has tight tolerances. On top of that, it is known for its chemical resistance and electroplating capability. The cost of Acrylonitrile Butadiene Styrene is seen as low/medium.
Polypropylene, or PP, is a lightweight material. It has a high heat and chemical resistance, while it is resistant to scratches as well. Its appearance is natural waxy and PP often is quite cheap. Polypropylene is used in the automotive industry quite a lot. The bumpers and covers of a car can be made of PP for example.
Acrylic, which has a weird abbreviation in PMMA, is a rigid and brittle material. It is transparent and has an optical clarity, while it is scratch resistant as well. Acrylic often does not cost that much. It is used for many different applications, such as knobs, panels, shelves, and more.
Acetal, or POM, is strong and rigid. It has excellent fatigue and creep resistance. Its moisture and chemical resistance is rather impressive as well. It is naturally opaque white and is relatively cheap. Acetal can be used for cams, rotors, gears, and more applications.