Six Factors to Consider Plastic Molding Companies will Consider when Choosing a Resin

Before producing a plastic part or product, plastic product molding companies will identify the type of resin they should use. The resin is the base of the part or product. This is the most important element of the final product which will affect the cost, usage, production time, and life cycle. Choosing the resin is done during the earliest stage of part design so it must be taken seriously. When selecting a resin, manufacturers consider the following:


Plastic product molding companies determine the acceptable part price based on their relationship with their client and by analyzing and understanding the market and economy. Justifying the price of the part with the current market price is a significant step in determining the final makeup of many different rotationally molded products.

Requirements of the Part

Plastic manufacturers will take everything physically asked of the final product into account. Every plastic product or component has a unique set of considerations such as the life cycle and purpose of the part, price point, aesthetics, and the environment they will exist in.


During the design stage of the part, manufacturers consider the choice of resins. This will help them determine the final look of the product and the way it will be molded. Raw plastics have varying end results that can impact wall thickness, ribs, and gussets, parting line and injection, appearance parts, and others.


Each product needs to have the ability to fulfill its purpose. Manufacturers know resins well and the will compare the part design attributes and requirements as well as weigh them against the attributes of the plastics they have tried and tested. They will determine the resin that falls within the parameters of performance with their client’s products.

Availability of Materials

Plastic molding companies take into account the needs of their client’s products and put their experience with materials to good use. They will also think about the supply and demand for plastic, particularly when production demand for the product is ongoing. When presenting their findings, they should have a second or third material choice.


There are products that require two different kinds of materials. For instance, overmolding involves molding a product with another substrate, making a cohesive and useful final product. In such cases, the manufacturer will choose a resin with a strong chemical bond with the substrate and understand both of the materials’ melt temperatures.

Usually, there are secondary operations require following the molding of the parts. These can include machining and finishing which can serve functional and decorative requirements for a certain product.

Related Articles

Back to top button