Material Selection Process (MSP)

In all plastic component designs, material selection is critical. During the selection process, one should consider the following factors to ensure the best possible selection.

Temperature

All plastics are affected by ambient heat and have a maximum continuous service temperature. The maximum continuous service temperature is not a melting point, but is the highest temperature at which a material will retain physical integrity. Important: Note that elevated temperatures affect material properties in a negative manner and should be carefully reviewed before use.

Temperature Variation

All plastic materials have coefficients of thermal expansion. Measured in in/in/°F, plastic materials vary greatly not only from each other, but in some cases ten times that of metallic counter parts. As a result, we consider temperature variations. Components should be designed to meet required service temperature. Not doing so may result in premature failure.

Environmental Conditions

Always consider the following environmental conditions under which the material must operate:

• Contact with debris such as sand, grit or dust
• Contact with chemicals such as strong acids, bases and caustics
• Contact with water, constant spray or wash downs
• FDA or USDA compliance
• Thermal Conductivity
• Radiation Exposure
• Microwave Exposure.

Other Considerations

• Size and Shape Availability
• Material Cost/Economy
• Machinability
• Standard or Custom Runs
• Custom Compounds