Selection of the proper material is crucial to part production. Designers should consider the mechanical characteristics, molding properties, and cost of the resin used.

  Application-specific requirements will always drive the need for particular material properties like tensile strength, impact resistance or ductility.

   Successful designs for injection molded parts are also built on an understanding of process-related issues such as the ability to fill the mold, tendency to flash, ease of part ejection, and the potential for warp, sink or void creation. Part geometry can be used to help address some of these issues, but just as material properties are an important factor in meeting the requirements of a given application, they should also be considered to ensure the moldability of the part.

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