several polyster/cotton waste blends were successfully used as feedstock to make injection molded products. nucleating and plasticizing additives (commonly required in the production process) were found to be unnecessary; their functions were fulfilled by the cotton component of the waste feedstock. the properties of the injection molded parts were comparable generally to those of a great many other plastics. cotton caused a notable increase in stiffness (modulus) of the molded part, but failed to produce a significant increase in tensile strength. plant trials revealed difficulties that were unobserved in the smaller scale runs: sticking in the mold, release of water and other volatiles at the molding temperature, and intermittent flow. sticking in the mold probably can be solved by including a small amount of mold release compound in the formulation just prior to pelletization. the problems of release of volatiles and intermittent flow can possibly be solved. polyester/cotton molded products would have a price advantage as feedstock in the commodity thermoplastics market, but it is possible that this could be dissipated by higher molding costs. (era citation 12:006806)