Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

An extruder, such as a double-screw extruder includes a double cylinder and a double-lead screw arranged therein with a drive train for the screw. The drive train has a coupling with the screw. The extruder includes a sensor for recording a moment load having torque and/or bending moment and for generating electronic data from the recorded moment load. A controller is provided in operative connection to a drive for the drive train and the sensor is in data connection with the controller. The controller is adapted to evaluate the data on the recorded moment load and to trigger a protective action if a threshold value set in the controller is exceeded. The evaluation includes a bending moment calculation. A plastic molding plant produces a film with the extruder along with a nozzle unit and a cooling and wind-up unit or a compounding plant. A method for operating such a plant for manufacturing a film includes the extruder.

Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

The present disclosure provides a method of producing an ethylene-vinyl alcohol copolymer resin composition feeding water-containing pellets of an ethylene-vinyl alcohol copolymer to an extruder for melt kneading.

The present invention relates to a light guide plate (LGP) capable of bidirectional focusing via a bidirectional micro-transmissive layer, a fabrication method of the LGP, an extrusion equipment, a backlight module and a display device. The LGP comprises a LGP substrate, the LGP substrate comprises at least one incident surface for receiving a light beam and one outgoing surface connected to the incident surface, a bidirectional micro-transmissive layer is provided in the LGP substrate, the bidirectional micro-transmissive layer comprises a plurality of micro-transmissive points having biconvex surfaces. According to the principle that convex lens converges light, the design of micro-transmissive points having biconvex surfaces causes several scattered light beams having different directions that enter the micro-transmissive points to be converged, which effectively improves the brightness of the outgoing surface of the LGP, thereby improving the brightness and definition of images displayed in the liquid crystal panel.

The present invention relates to a process for producing transparent polymeric films or plastics moldings of particularly high chemical resistance, having more particularly a very good resistance towards oil-in-water and water-in-oil emulsions, and of high optical quality.

Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.