Commingled post-consumer waste plastics, from municipal recycling collections, have been melt blended with Pinus Radiata fibre to form composite materials. Increases in tensile strengths of the order of 30% to 50% over those of the matrix materials have been achieved in these composite materials with the use of suitable coupling agents. Five different coupling agents were trialed but only two, Epolene E-43 (a maleated propylene wax) and Ken-React CAPS L12/L (a proprietary neoalkoxy titanium phosphate) gave significant increases in tensile strength.
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