Machine means for design, control and economic optimisation of polyolefine production processes and their products

摘要

The polymer industry and especially the producers of polyolefines move towards producing polyolefines with increased strength. This gives polyolefine applications with thinner container walls, thinner films and pipes. This again leads to a reduction in weight, transport cost and material usage, making the use of plastics more attractive and enhancing its environment advantages over other materials even further. To obtain this advantage more tailoring of the molecules is required. For a cost-effective way of to do this computer modelling tools are used. Examples of this will be discussed. The converters being the customers of the producers needs to run their machinery closer to the limits so as to utilise their assets better and better. This sets more stringent requirements for more even product quality with smaller and smaller variations. The producer's hence needs to control the product quality and production process better and better. This is achieved with increasing utilisation of model based control. The lowering of the cost of transport and the abundance of raw material as Naphtha and petroleum gasses in the eastern countries constrains European economical operation more and more. Plastics pellets are raw materials and its demand varies with the faith people have in the economy of the area and the world in general. These variations show to be difficult to predict and they are bumpy. The most economical way of producing the plastic pellets depends on the price to be obtained for prime products and the transition product and the costs of the raw materials. Tools to do economic optimisation depending on the marked conditions will be discussed.