Comparison of the sandwich moulding and structural foam processes

2 COMPARISON OF THE SANDWICH MOULDING AND STRUCTURAL FOAM PROCESSES 

Many similarities exist between SM and SF mouldings. Briefly, both techniques are based on the injection moulding process and the products consist of solid skins with low-density cores. However, two important differences exist between the techniques  

It was because of the above shortcomings of SF mouldings that ICI in 1970 pioneered the SM process which gave products with smooth, high-gloss surfaces as moulded. Later, this process was licensed to other 

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