TH37778B - A method for the continuous production of expandable plastic resins. - Google Patents

Abstract

DC60 By using this method, expandable resin (G) can be produced continuously where the plastic melt (F) is saturated. by using a liquid expanding agent (B) and a saturated melt. will be granulated The method is performed using the machine, which includes the following components.

Claims (9)

Disclaimers (all) that will not appear on the advertisement page: 1.Method for continuous production of expandable resin (G) by saturating. Of the plastic melt (F) by means of a fluid expansion agent (B) and granulation of the compound. Saturated This includes at least one pressure-inducing feeder (1) for the melt, in particular a volumetric pump feeder, a measuring device (9) for the diluent. Body, machine for touch And making it Homogeneous (2) for impregnation of the melt, at least one (3) coolers for the molten treated Saturating, submersible granulation machine (6) and machine controller (1) where the granulation is Operated using liquid Which is used in granulation machines As a cooling and transport medium for pellets, it is characterized by the liquid being used. During granulation Will be applied to The pelletizer (6) passes through the pump (60) under the increased pressure. On the basis of the recharging action of the expander in the unsmoked granules, it is at least partially suspended. And that the parameters to be set for granulation are controlled, where the parameters Including temperature And the pressure of the melt Saturated At the entrance Of the granulator, and such pressure and temperature are measured by the regulator to provide the measured values; however, the measurement values are compared with the required values. And the deviation between the values of The required measurements and values are used by the instrument regulator to control and affect the endothermic effect. From the melt being saturated by the heat sink. 2. Method according to claim 1, that is characterized by whether a liquid is water. 3. Method according to claim 1, which is characterized by that liquid is saline. 4. The method, according to claim 1, is characterized by whether the mixer is stationary. Will be used as a touch device And homogenization (2) and / or similar The cooler (3) is a stationary mixer. 5. Method according to claim 4, that is characterized by whether the mixer is stationary. It consists of parts in the mix. 6. Method according to claim 5, which defines the characteristics that the parts in the mix are Specially designed as a heat exchanger tube. 7. Method according to one of the claims 1 to 6, is characterized by whether the feeder (10) for the melt is a gear pump or extruder. The feeding power can be affected by the regulator (1) compared to the variable proposition of the melt (F) to be saturated. Where the measured feed of the reagent (B) is controlled. 8. Procedures according to any one of Claims 1 through 7, which is characterized by that The expansion agent (B) is initially dispersed in the melt (F) of the machine for contact. And homogenization (2), using a large shear action In the stationary mixer (2a), and in the stationary mixer Which has been in this way It is fed to the second stage (2b), where the mixture is dynamically maintained within a predetermined pressure range. And during the persistence time Within distance Of a predetermined time as well 9.Methods according to any one of Claims 1 through 8, characterized as polystyrene, styrene-copolymer, polyolefin. Or a mixture of the mentioned material is used as plastic (F); And that water (H2O), carbon dioxide (CO2), nitrogen (N2), low boiling point hydrocarbons, or mixtures of the mentioned substances will be used as expansion agents (B) 1. 0. Method according to claim 9, that is characterized as polyolefin. Is polyethylene 1. 1. Method according to claim 9, that is characterized as polyolefin. Is polypropylene 1 2. Method according to claim 9, characterized by that low boiling point hydrocarbons are pentane 1. 3. Method according to any one of Claims 1 through 12, that is characterized as the additive At least one of the compositions is mixed before, during and / or after 1 impregnation. 4. Method according to any one of Claims 1 to 13, that is characterized by that one of the different granular forms will be produced. 1 5. The method, according to claim No. 14, is characterized by that pellets (G) are produced as "pellets" 1. 6. Method according to claim No. 14, is characterized by that the pellets (G) are produced in the form of "pellets" 1. 7.The method, according to claim 14, is characterized by that the pellets (G) are produced in the form of partially expanded pellets 1. 8. A machine for the production of expandable plastic granules (G) in accordance with one of the Claims 1 through 17 are characterized by that it includes the following components. That are arranged in series: 1st gear pump (10) or extruder (10) for the melt. Which will be saturated; Stationary mixer (2) with inlet connection to the metering pump (9) for expansion agent (B); Cooler (3) or a set of coolers In which its heat exchanger is designed as a component in the stationary mixing; Second gear pump Which are arranged within a set of machines Cooling Additional stationary mixers (5); Underwater granulator (6); And controller Electronic (1) machines which are provided for the control of the parameters to be determined for granulation. And for this purpose there will be a transmitted connection (110, 13, 16, 19) to the pump or extruder (9, 10), to the heat sink or to a certain number of machines. Cooling And with a granulator as well 1 9. A machine for the production of expandable plastic granules (G) in accordance with one of the Claims 1 through 17 are characterized by that it includes the following components. That are arranged in series: 1st gear pump (10) or extruder (10) for the melt. Which will be saturated; Stationary mixer (2) with inlet connection to measuring pump (9) for expansion (B); Cooler (3) or a set of coolers In which its heat exchanger is designed as a component in the stationary mixing; Second gear pump Which are arranged according to the coolers, additional stationary mixers (5); Underwater granulator (6); And control machine Electronic (1) which is provided for the control of the parameters to be determined. For granulation and for this purpose a transmitted connection (110, 13, 16, 19) with a pump or extruder (9,10), with a cooler or with a Some of the cooling machines and with the pelletizer as well 2. 0. Apparatus according to claim 18 or 19, that is characterized as a stationary mixer (2) that follows the first gear pump. The first stationary mixer (2a) is followed by the second stationary mixer (2b), where the parts are mixed. In the first stationary mixer, more shearing results are generated in the second mixer. And that's the second stationary mixer There will be a cross-section of the flow. Which is greater than the corresponding cross-section of the first stationary mixer