Material Properties of Plastics

Testing of Material Properties of a Product

During the manufacture of a finished product or a semi-finished product, the processed polymer is subject to a variety of mechanical, thermal, and chemical loadings and normally forms orientations for the polymer chains and fillers. Therefore, the mechanical properties of a polymer differ at various points of the component.

To compare material properties of an end product produced by injection molding, extruding, or compression molding, a sampling plan for the specimen is defined. This sampling plan is based on the forming process of the end product and defines the number, form, size, and direction of sampling of the specimen.

After appropriate conditioning, the specimens taken are tested to the test standards also used in molding materials or to specific information found in the product specification.

Regular specimen sampling from ongoing production ensures that specific material properties remain constant in one product within predefined tolerances and over longer production periods.

Zwick offers reliable universal testing machines and extensometers for tensile, flexure, and compression tests, as well as pendulum impact testers, hardness testers, extrusion plastometers, and HDT/Vicat testing instruments as manual or completely automated systems. Thus, the statistical scatter of your results is significantly reduced.

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