Relative costs of various cores for sandwich composites

The following figures for processing costs are some examples of the orders of magnitude for specific cases a different context can lead to a very different cost. 

Worldwide plastics consumption is of the order of 170 million tonnes annually in round figures, with a turnover of 560 billion - that is to say, an average cost of 3.3 per kg. European costs and consumption are of the same order. 

For a given processing technology, the processing costs are highly dependent on the annual production the size and shape of the parts the precision level the material cost the processing difficulties the recycling possibilities. 

For extruded goods such as films, sheets and tubes, the costs are of the order of  

Each different design with a profile requiring the machining of a specific tool is charged with the tool cost. 

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Figure 2.15. Relative costs of various cores for sandwich composites...

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