Pet plastic injection molding11/18/2023 Now, you can see that your choice of plastic resin can very much influence the appropriate mold tool material as well. However, be aware that if you’re making optically clear plastic parts the mold tool must be highly polished, which in turn implies the use of a higher grade of stainless steel that costs more. We use polycarbonate when we need something substantially stronger than acrylic. When molding with this amorphous thermoplastic material, precise dimensional control can be maintained as it has predictable and uniform mold shrinkage. Polycarbonate is another clear injection molding resin that has excellent optical properties and is extremely durable. BPA is a harmful organic compound, so plastic injection molding resins like acrylic are considered safe for food storage. On top of its optical and transparent properties, acrylic is odorless and tasteless and doesn’t contain Bisphenol A (BPA). It takes dyes and colorants very well so you can produce many aesthetic effects. It’s often used as an alternative to glass due to its high tensile strength and weather and scratch resistant nature. We use acrylic to produce transparent parts such as windows, view screens, and various lighting equipment. Nylon is also known by its chemical designation PA (Polyamide). It’s not the ideal choice for marine applications. You should be aware that, although it’s a strong plastic, it tends to absorb water. It’s very common in automotive applications because not only is it tough but it helps to reduce weight and lower production costs compared to a metal analogue. Nylon is often used to produce strong mechanical parts like bushings, gears, and bearings. Therefore, we’d like to help you refine your search by explaining the properties of the ten most common plastic injection molding resins that we use for the majority of parts that we make here at Star Rapid. Then the material’s strength, durability, flexibility, color, and cost come into play. So clearly you’ll need to consider what type of injection molding material is going to stand up to various environmental challenges such as temperature fluctuations, moisture, chemical exposure, UV light, and many more. When choosing a plastic, the first thing you have to consider is the part’s function and the physical environment that it’s going to be exposed to. The good news is that there are many thousands of plastic injection molding resins to choose from with similar – but not identical – properties, so you have many potential solutions available. The best resin is the one that works for you and your unique circumstances. And honestly there is no one answer for that. We often get asked what the best plastic injection molding resin is to use for certain projects.
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