A composition and a method are provided for graphene reinforced polyethylene terephthalate (PET). Graphene nanoplatelets (GNPs) comprising multi-layer graphene are used to reinforce PET, thereby improving the properties of PET for various new applications. Master-batches comprising polyethylene terephthalate with dispersed graphene nanoplatelets are obtained by way of compounding. The master-batches are used to form PET-GNP nanocomposites at weight fractions ranging between 0.5% and 15%. In some embodiments, PET and GNPs are melt compounded by way of twin-screw extrusion. In some embodiments, ultrasound is coupled with a twin-screw extruder so as to assist with melt compounding. In some embodiments, the PET-GNP nanocomposites are prepared by way of high-speed injection molding. The PET-GNP nanocomposites are compared by way of their mechanical, thermal, and rheological properties so as to contrast different compounding processes.

A composition and method for producing high-density polyethylene (HDPE) pails with elevated post-consumer recycled (PCR) content. HDPE recyclate is modified to form a modified HDPE recyclate. A blend comprising a majority of the modified HDPE recyclate and a linear low-density polyethylene (LLDPE) is provided as a substitute for virgin HDPE currently used in production of injection molded pails. By employing thermal visbreaking technology alongside specialized recipe formulation, the resulting composition matches or surpasses the processability and key performance attributes of conventional virgin HDPE pails.

A composition and method for producing high-density polyethylene (HDPE) pails with elevated post-consumer recycled (PCR) content. HDPE recyclate is modified to form a modified HDPE recyclate. A blend comprising a majority of the modified HDPE recyclate and a linear low-density polyethylene (LLDPE) is provided as a substitute for virgin HDPE currently used in production of injection molded pails. By employing thermal visbreaking technology alongside specialized recipe formulation, the resulting composition matches or surpasses the processability and key performance attributes of conventional virgin HDPE pails.

A mixing and extrusion machine (10) for the manufacture of rubber mixtures has a mixer with a converging conical twin screw (12) with a fixed frame (14) that supports sleeves (16). Two screws (18), being mounted at an angle, are mounted in the mixer (12) so as to move in translational movement between an opening (22) arranged upstream and an outlet (25) arranged downstream of the sleeves, so that the thread tips of each screw contact tangentially the surfaces of the opposite screw so that the screws remain substantially in contact with each other when the screws rotate at an angle and at a center distance that facilitates self-cleaning. The screw threads maintain tangential contact with the inner surfaces of the sleeves, thus preventing the retention of mixing material on these surfaces.

A mixing and extrusion machine (10) for the manufacture of rubber mixtures has a mixer with a converging conical twin screw (12) with a fixed frame (14) that supports sleeves (16). Two screws (18), being mounted at an angle, are mounted in the mixer (12) so as to move in translational movement between an opening (22) arranged upstream and an outlet (25) arranged downstream of the sleeves, so that the thread tips of each screw contact tangentially the surfaces of the opposite screw so that the screws remain substantially in contact with each other when the screws rotate at an angle and at a center distance that facilitates self-cleaning. The screw threads maintain tangential contact with the inner surfaces of the sleeves, thus preventing the retention of mixing material on these surfaces.

The kneading rotor according to one aspect of the present disclosure is a kneading rotor for a kneading machine, comprising a base made of carbon steel or alloy steel for machine structure, a padded layer made of austenitic stainless steel on at least part of a surface of the base and has a hard chromium plated layer on at least part of a surface of the padded layer.

The kneading rotor according to one aspect of the present disclosure is a kneading rotor for a kneading machine, comprising a base made of carbon steel or alloy steel for machine structure, a padded layer made of austenitic stainless steel on at least part of a surface of the base and has a hard chromium plated layer on at least part of a surface of the padded layer.

An internal mixer includes a mixing chamber having a mixing room, a material input portion located above the mixing chamber, a weight, a driving device that raises and lowers the weight between a lower position where the weight can press a material to be kneaded in the mixing room from above and a retraction position where the weight is retracted upward from the lower position, a mixing rotor that kneads the material to be kneaded in the mixing room, and an exhausting device having an inner end portion facing the mixing room and provided in the mixing chamber and configured to be able to discharge gas generated during kneading of the material to be kneaded from the inner end to the outside of the mixing chamber.

An internal mixer includes a mixing chamber having a mixing room, a material input portion located above the mixing chamber, a weight, a driving device that raises and lowers the weight between a lower position where the weight can press a material to be kneaded in the mixing room from above and a retraction position where the weight is retracted upward from the lower position, a mixing rotor that kneads the material to be kneaded in the mixing room, and an exhausting device having an inner end portion facing the mixing room and provided in the mixing chamber and configured to be able to discharge gas generated during kneading of the material to be kneaded from the inner end to the outside of the mixing chamber.