ISO 21304-2 Preparation of test specimens cutter, Plastics Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials. 

ISO 21304-2 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of PE-UHMW moulding and extrusion materials1. It also specifies a method for determining the effect of heat on unplasticized poly (vinyl chloride) (PVC-U) profiles. 

This document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of PE-UHMW moulding and extrusion materials. It gives the requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing.

This document gives the procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made. Properties and test methods which are suitable and necessary to characterize PE-UHMW moulding and extrusion materials are listed.

The properties have been selected from the general test methods in ISO 10350-1. Other test methods in wide use for or of particular significance to these moulding and extrusion materials are also included in this document, as are the designatory properties specified in ISO 21304-1. This document specifies the materials with MFR less than 0,1 g/10 min at 190 °C /21,6 kg based on ISO 17855-1.

UnitedTest Charpy double-notch sample cutter, sample preparation machine. 

ISO 21304-2 methods of preparation and conditioning, the specimen dimensions and the test procedures specified in this document are used in order to obtain reproducible and comparable test results. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.

Charpy double-notched impact strength

impact energy absorbed in breaking a double-notched specimen, referred to the original cross-sectional area of the specimen, at double notches