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Material Selection

prototype materials

Your choice of materials, no compromise required.

The Engineering Resource Center offers a variety of injection molding material choices. Thanks to our great relationships with material suppliers, thousands of materials are at your fingertips. Our sampling process allows you to trial up to 3 materials at a time. 

Our engineers are skilled in assisting with material selection to ensure the strength and quality of your part. We will never ask you to compromise on a specified material request and we will help you reduce costs by lowering the amount of material used. Watch our video to learn more!

Material Thickness Guideline

Material thickness is one of the most critical factors in part design. Thickness plays a role in a number of factors including performance, appearance, moldability, cost and more. Thinner material walls will reduce the amount of material, and cycle time. While minimizing material use should be on the mind of a designer, achieving an ideal wall thickness can be a balance between the strength of the material and weight which are important factors to the part’s overall durability and cost. Here are some general material thickness guidelines to consider:


0.045 - 0.140


0.030 - 0.120


0.025 - 0.500

Liquid crystal polymer

0.030 - 0.120

Long-fiber reinforced plastics

0.075 - 1.000


0.030 - 0.115


0.040 - 0.150


0.025 - 0.125


0.030 - 0.200

Polyphenylene sulfide

0.020 - 0.180


0.025 - 0.150


0.035 - 0.150


0.080 - 0.750

Rigid PVC


Soft PVC