초록 ▼

A method of making polymeric particulates wherein polymeric scrap material, virgin polymeric material and mixtures thereof are supplied to intermeshing extruder screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pul

A method of making polymeric particulates wherein polymeric scrap material, virgin polymeric material and mixtures thereof are supplied to intermeshing extruder screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pulverization and in-situ polymer compatibilization, if two or more incompatible polymers are present. Uniform pulverized particulates are produced without addition of a compatibilizing agent. The pulverized particulates are directly melt processable (as powder feedstock) and surprisingly yield a substantially homogeneous light color product.

대표청구항 ▼

[ What is claimed is:] [1.] A method of preparing polymer particles comprising the steps of:(a) providing a supply of polymer material,(b) effecting a chemical change to the polymer material by application of mechanical energy to convert the material into a powder solely in the solid state in the pr

[ What is claimed is:] [1.] A method of preparing polymer particles comprising the steps of:(a) providing a supply of polymer material,(b) effecting a chemical change to the polymer material by application of mechanical energy to convert the material into a powder solely in the solid state in the presence of cooling sufficient to maintain the material in the solid state during said conversion into said powder; and(c) discharging the resulting particles of powder.