Subject mould extrusion

Very often (since a melt process is to be used) a material for injection moulding or extrusion will be subjected in advance to one or more tests of flow at different temperatures, using relevant equipment and methods from British and international standards or other specifications. 

Dehydration of sepiolite clays under temperature scan of 20K/min in inert atmosphere. The dashed lines represent the temperature window at which clays are typically subjected to during polyolefin composites preparation (extrusion and compression/injection moulding) [11]. 

During processing block copolymers are subjected to flow. Eor example thermoplastic elastomers formed by po/y(styrene-butadiene-styrene) (PS-PB-PS) triblock copolymers, are moulded by extrusion. This leads to alignment... 

Processability of elastomers, whether in mixing, extrusion, moulding or curing is, and always has been, a problem for the processor. The concept itself is difficult to define. In fact, rubber processability is a subjective concept in that it depends on what you want to do with the material, and in what equipment, whether it processes well or badly. Furthermore, there has been a lack of simple, easy tests that can measure processability. Generally, if the test is simple it does not correlate directly with processability, and, if it does correlate, it is not... 

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