What is ISO 21306-2 - Preparation of test specimens and determination of properties of PVC-U about?
ISO 21306-2 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of PVC-U moulding and extrusion materials. Requirements for handling test materials and for conditioning both the test material before moulding and the specimens before testing are given.
NOTE 1: The values determined in accordance with ISO 21306-2 are not necessarily identical to those obtained using specimens of different dimensions and/or prepared by different procedures. The values obtained for the properties of a moulding depend on the moulding compound, the shape, the test method, and the state of anisotropy. The last-mentioned depends on the gating of the mould and the moulding conditions, for example, temperature, pressure, and injection rate. Any subsequent treatment is also be considered, for example, conditioning or annealing.
Who is ISO 21306-2 - Preparation of test specimens and determination of properties of PVC-U for?
ISO 21306-2 on the preparation of test specimens and determination of properties of PVC-U is useful for:
- Unplasticized poly (vinyl chloride) (PVC-U) manufacturers
- Product development / innovation / research teams
- Quality control teams
Why should you use ISO 21306-2 - Preparation of test specimens and determination of properties of PVC-U?
PVC-U is an amorphous thermoplastic. The characteristics of PVC-U moulded parts are strongly dependent on the composition of the formula, but also on the processing.
ISO 21306-2 ensures the preparation of test specimens and determination of properties of PVC-U in order to obtain reproducible and comparable test results, the methods of preparation and conditioning, the specimen dimensions and the test procedures specified herein are used and the thermal history and the internal stresses of the specimens can strongly influence the thermal and mechanical properties and the resistance to environmental stress cracking, but exert less effect on the electrical properties, which depend mainly on the chemical composition of the moulding compound.
So, for the high-performance results of the PVC-U, the test specimens should be prepared accordingly mentioned and determination of the properties can let the users to improve the quality aspects of the PVC-U.
What’s changed since the last update?
BS EN ISO 21306-2:2019 supersedes ISO 1163‑2:1995. BS EN ISO 21306-2:2019 includes some technical changes with respect to ISO 1163‑2:1995. These include:
- ISO 3167 has been replaced by ISO 20753
- IEC 93 has been replaced by the new editions of IEC 62631‑3‑1 and of IEC 62631‑3‑2.