Technology for preparing micropore pipe through semi-molten continuous extrusion of high molecular powder

Abstract

The invention relates to a technology for preparing a micropore pipe through semi-molten continuous extrusion of high molecular powder. The technology is characterized by comprising the following steps: (1) feeding solid powdered material in a screw extruding device through a hopper; (2) heating a barrel entering the screw extruding device, and performing initial compaction by a threaded rod at the same time so as to enable materials to be in a semi-molten state; (3) feeding the material in a handpiece for further compaction; (4) feeding the materials in a mould cavity of a neck mould of the screw extruding device to be tubular, determining inner and outer diameters under the effect of a vacuum cooling forming sleeve, and initially cooling; (5) cutting through a cutting device to obtain the micropore pipe. According to the technology, the high molecular powder is continuously extruded and formed when being in semi-molten state and the produced product does not need to be subjected to aftertreatment simultaneously when production of micropore pipes is realized, so that the production efficiency is greatly improved. According to the technology, a solvent is not used, and thus the micropore pipe is beneficial to environmental protection and health of operators.

Description

technical field [0001] The invention relates to a molding process of polymer microporous materials, in particular to a molding process of polymer microporous tubes. Background technique [0002] At present, the molding methods of microporous materials at home and abroad include: polymer particle sintering method, thermal phase separation method, inorganic particle filling method and melt extrusion stretching method, etc. Among them, the polymer particle sintering method is a method in which particles of a certain particle size are loaded into corresponding molds and sintered at high temperature to obtain microporous materials. It is a discontinuous production method with low production efficiency; thermally induced phase separation method is to The polymer dissolves in a specific solvent at high temperature to form a homogeneous solution. When the temperature decreases, the solid-liquid phase separation occurs in the homogeneous system. After the solvent is removed, the spac...

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Problems solved by technology

In addition, polymer resin tubular products made by ordinary extrusion methods are closed-cell products

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