A modified SMC (sheet moulding compounds) composite material for incorporation into thermoplastics in order to improve their mechanical properties was successfully developed using a physicochemical process from SMC plates. The design of the process has been investigated in term of optimization of different parameters using an experimental design and in term of capability by statistical process control techniques. Resulting data highlighted the main influential factors which were acid concentration and agitation period. Moreover, successive reuses of the filtrate solution in the dissolution process can be achieved. The dissolution process was studied using SPC (statistical process control), and this has concluded to a rather acceptable capability because Cpk and C(indp) (process capability indices) values are higher than 1.33. Finally, a SMC able to be incorporated into thermoplastics with a rate more than 40 wt% of glass fibres instead of only 25 wt% initially, was prepared. This rise offers the possibility to this reused material to compete with new glass fibres provided the use of relevant surface treatments. It is important to notice that a scale-up has been realised successfully on a quantity of SMC wastes, from automotive bonnets and boots, bordering the 200 kg batches. Moreover, the complete process of recycling has been just rewarded by the Prize from the Innovating Techniques 2006 waste category decreed by ADEME (French national agency for the environment).
Optimizing a recycling process of SMC composite waste
Waste Management ; 28 , 3 ; 541-548
2008
8 Seiten, 6 Bilder, 5 Tabellen, 24 Quellen
Aufsatz (Zeitschrift)
Englisch
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