Polyurethane blended hollow fiber membrane and method for preparing same

Abstract

The present invention relates to polyurethane blending hollow fiber membrane and its preparation. The membrane has the micro-porous structure of polymer interface and comprises the mass percent of 55 to 75% polyurethane and 25 to 45% dispersive components, wherein the hard block and elastic block of the polyurethane is of the mass proportion of 1:2 and the dispersive components are polyolefine polymers, comprising polyvinylidene fluoride and polyacrylonitrile. The preparation adopts melt spinning-pore tension method using the said hollow fiber membrane mass percent at the melt spinning temperature of 170 to 180 degree, fixed-length heat shaping temperature of 50 to 60 degree and spinneret tension times of 2 to 4 times. The said hollow fiber membrane has compact structure, good support function, good separation system sensitivity and good memory. The said preparation is simple without any solvent or additive at relatively low cost and has no environmental pollution, suitable for modern green industrial production.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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AI Technical Summary

Benefits of technology

This patented technology describes how different types of plastic mixed together create a type called Polyurea Blender HousF membrane (PHBF) that allows gas molecules to pass through while still allowing liquids to flow freely. By adjusting these factors like ratio between certain chemical substances used during mixing, this PHFLM becomes very sensitive even if there aren't any specific compounds added inside them. Additionally, due to the unique microstructure formed on both interfaces, the resulting Microspheric Structure also shows great potential applications such as separating memories. Overall, this new material made up of two parts - Partially Interchangeable Plastonymers and Dispersible Phase Concentrates provides technical benefits over existing methods.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the quality and stability of thin films called "Paper Microspheres," specifically those containing fine particles dispersed throughout their volume. These tiny holes allow airflow while still maintaining good mechanical strength without losing any memories due to insufficient space inside they. To solve these issues, various techniques were developed including coating solutions onto the surface of the thin film before making it through stretching processes like extrusion or immersion lithography. Additionally, other approaches involving phase separation technologies like phase separations at interfaces involve adding different compounds to improve the effectiveness of separation functions.