This International Standard specifies two methods, A and B, for the preparation of pastes (also known as plastisols) from appropriate PVC resins, plasticizers and other ingredients using a planetary mixing process.
Both method A and method B can be used to prepare pastes of any composition. Method A (single-speed) is particularly applicable to resins prone to heat build-up during paste preparation, while method B (two-speed) might be preferred for repetitive work, e.g. for process control during resin manufacture, because of its shorter mixing time.
Such pastes may be used for a variety of test purposes, including the determination of rheological properties for resin designation and specification.
BS EN ISO 4612:1999 history
2019BS EN ISO 4612:2018 Plastics. Preparation of PVC pastes for test purposes. Planetary-mixer method
1999BS EN ISO 4612:1999 Plastics - Preparation of PVC pastes for test purposes - Planetary-mixer method