Polymer Dictionary

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	BorAPC Borealis tailor-made Advanced Process Control (APC) for polyolefin polymerisation processes. APC is process control utilising detailed knowledge, compared with traditional process control where the method is standard and not specifically adapted to the process. The basis for APC is knowledge of a process expressed as mathematical models. Model predictive control (MPC) ensures that control actions also compensate for the future behaviour of the process, leading to optimal grade changes. BorAPC includes non-linear MPC, making it well-suited for polymerisation processes and ahead of what "normal" control vendors offer.
	Blow moulding Extrusion of a parison (hollow melt tube) which is forced to a mould caving by internal pressure and cooled down to form a hollow article. Used for the production of bottles, wide-mouth containers, petrol tanks etc.
	Bimodal A polyethylene with a relatively high molecular weight fraction and a relatively low molecular weight fraction is called bimodal polyethylene. The comonomer contents of the two fractions are often different.