TH33339B - Equipment and processes for removing gas from plastic materials using a high molecular weight polycarbonate solution. - Google Patents

Abstract

DC60 (22/03/43) Equipment for removing gas from plastic materials. especially the polycarbonate solution A high molecular weight, described as having a dual axis extruder, which is composed of spindles in the same direction and crushes each other. This device is characterized by This extruder is proportional to the length to diameter less than/40, where the core is designed with a double conductor in the extruder gas degassing region. and having three conductors in the extruder's pressure generating area, this device enables the production of polycarbon Nate with light passing (Extremely high Transmittancy) Economically, a device for degassing from plastic materials. especially the polycarbonate solution A high molecular weight, described as having a dual axis extruder, which is composed of spindles in the same direction and crushes each other. This device is characterized by This extruder is proportional to the length to diameter less than/40, where the core is designed with a double conductor in the extruder gas degassing region. and having three conductors in the extruder's pressure generating area, this device enables the production of polycarbon Nate with light passing (Transmittancy) that is exceptionally high economically

Claims (2)

1. A device for removing gases from plastic materials, especially polycarbonate solutions that High molecular weight, with cradle-axis extruder, which is composed of axes that rotate in one direction and collide with each other, which characterizes that The extruder has a length to diameter ratio. Less than / equal to 40, where this core is designed with a dual conductor in the extruder gas deoxidation zone and with a three-conductor in the pressure-generating region of that extruder. That the length to Diameter is in the range 35-40 3. Equipment according to Claims 1 or 2, that characterizes that specific. This extruder is assembled Included further with refrigeration equipment The cooling area 4. Equipment according to Clause 3, that specifies that specific characteristics The core is designed with three conductors. 5. The device, according to one of the preceding claims, specifies that the massage unit is positioned at the instantaneous end of the inlet (2) of the extruder between the feeder units. Of Axis 6. One of the preceding claims, which characterizes that Extruder The feed direction consists of a large number of degassed regions, each of which is connected to an extraction device. 7. Device according to one of the preceding claims, specifying that the axis has a conductor profile. three In the two inter-degassing areas 8. Equipment according to one of the preceding claims, which characterizes that Extruder It consists of an entrance to the trap (11) placed between the two de-gaseous zones. 9. The equipment according to claim 8, which indicates the specific characteristics that Extruder in the feeding direction It consists of three gas removal areas, where the entrapment is (11) is placed between areas Eliminate the second and third gases 1 0. Device according to one of the preceding claims, characterized by the presence of current in the inlet (2) of the extruder is the outlet (3) ) Used for rear gas removal 1 1. The device, according to one of the previous claims, specifies that the laid end current of the final degassing zone - in the direction of feeding is the Filling tool (15) for compound mixing 1 2. Process for degassing from plastic materials, especially polycarbonate solutions. With a high molecular weight, by means of a twin-axis extruder, which is equipped with a directional spindle And driving each other, that characterizes that The core is designed to have a pair of conductors in the area. Eliminate the gas of the extruder And there are three conductors in the pressure-forming area of the extruder and the extruder length-to-diameter ratio. Less than / equal to 40 1 3. Process according to claim 12, which characterizes that To length ratio diameter It is between 35-40 1. 4. Process according to claim 12 or 13, which characterizes that Plastic material is cooled 1 5. Process according to claim 14, characterizing that the core is designed with a conductor. Three in the cooling area 1 6. Process according to one of the 12-15 claims. That characterizes the specific characteristics that the removal of gas from plastic materials Was made in the form of forward gas elimination Or a combination of Forward and backward gas elimination, where the elimination of gas forward It is effected in multiple stages and volatile components of plastic materials. Eliminated in each step, degassed by means of Extraction device 1 7. Process according to one of Claim 12-16, which characterizes that the extruder in the feed direction consists of three degassing regions, where absolute pressure is produced. Up at vent (5) relative to the first degassing zone in the range 0.5-1.5 bar, at vent (9) relative to the second degassing zone in the range 0.03-1.9 bar and at vent (10) at Relative to the third degassing zone in the range 0.001-0.03 bar 1 8. Process according to one of the claims 12-17, specifying that the interceptor was mixed with plastic material 1 9. Process according to the claim. 18 or 19, indicating that the trap is mixed in the feed direction between the second and third degassing zone 2 0. Process according to claim 18 or 19, that characterizes that Uses nitrogen as a trap 2 1. The process according to claim 20, that defines the specific characteristics that Extruder Was operating at The rotational speed is less than / equal to 390 r / min and the volumetric flow rate of the supplied nitrogen is 2-10 Nm 3 / h. 2 2. Process for any of the 12-21 claims, that characterizes that Final degassing zone - in the feed direction next to the pressure build zone