The technology of compound leaching membrane reactive extrusion
DATE：2021/4/22 9:05:08 / READ： / SOURCE：This station
The technology of compound leaching membrane reactive extrusion
Compound film production line www.handern.com
Although the mixing effect and capacity of single screw extruder are not as good as that of twin screw extruder, its equipment is low in price and small in investment, and is suitable for small-scale factory production, and is widely used in China. Especially, the improved new screw has the best effect, such as barrier screw, pin screw, distribution screw and single screw extruder equipped with static mixer. The mixing of the common single screw extruder is the result of the drag flow and the pressure flow. In simple shear mixer, the increase of interface area and the applied strain become proportion. With the extrusion of shear, the interface is more and more distributed in the direction of shear strain, and its elongation is linear with the strain size. If the interface monomer reaction can be made and reoriented relative to the existing shear direction, the mixing ratio can be doubled. For example, the element flow caused by grafting anti mixing pin in extruder screw groove is not ideal, but it has obvious reorientation, which makes the interface area increase and the mixing effect is improved obviously. Compound film production line www.handern.com
The mixing performance of twin screw extruder is better than that of single screw extruder. For non meshing (- like abnormal rotation) twin screw materials have been very important for extruders. Because the two holes in the machine are connected, the materials in the two simple holes have excellent capacity for each other. When the material passes through the tangent of two screws with the rotation of the silver rod, the orientation of the material will be reoriented, and the material flow from the forward cutting orientation area to other areas will also be reoriented. The continuous reorientation of the real mixed population depends on the interface (shear) is exponential function, and it is independent of the degree rate of change. Even under the low bar rotation, the surface can obtain good dispersion mixing. In order to improve the mixing performance, the twin screw extruder is generally equipped with mixing elements. Screw extruder has the following advantages: ① it is easy to add (solid, melt and liquid) as reactor: ② good micro separation and distribution combination: wide range of medium degree and pressure pattern, control the whole time distribution of the tube, and divide the reaction extrusion ⑥ the unresponsive monomer and by-product crystal can be excluded: ⑦ it can be realized Continuous processing, small volume continuous processing, ⑧ without solvent or diluent, energy saving, low pollution, ⑨ adhesive starting body easy to discharge, 0 has a larger choice of raw materials, products, etc., while controlling the chemical structure, but also can control the microstructure, so that the polymer has new properties.
Compound film production line www.handern.com
Author：admin