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Method for preparing composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane

A technology of polytetrafluoroethylene and polyethylene, which is applied in the field of nano-nonwoven material preparation, achieves the effects of low raw material cost, excellent mechanical properties, and enhanced resistance to deformation

Active Publication Date: 2016-07-27
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the technical difficulties in the prior art that polytetrafluoroethylene and ultra-high modulus polyethylene filter membranes cannot be prepared, and utilize the reasonable combination of micro-layer co-extrusion technology and stretching technology, Developed a preparation method for composite polytetrafluoroethylene and ultra-high modulus polyethylene filter membranes to meet the social needs of industrialized filter membranes

Method used

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  • Method for preparing composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 As shown, the preparation method of the composite polytetrafluoroethylene and ultra-high modulus polyethylene filter membrane in this example includes the following steps: (1) raw material component A: a mixture of white oil and polytetrafluoroethylene and component B : The mixture of white oil and ultra-high modulus polyethylene is fed from the two plunger pumps of the three-piston pump extruder respectively. The weight ratio of white oil and polytetrafluoroethylene in component A is 95:5. The weight ratio of white oil to ultra-high modulus polyethylene in part B is 95:5; (2) Introduce component A and component B in the step (1) under the action of a three-piston pump extruder The micro-layer co-extrusion device extrudes 50 layers of laminated material through the micro-layer co-extruded device; (3) The laminated material prepared in step (2) enters the hanger die and is extruded into a layer with 50 layers and a thickness of 50um melt film; (4) the melt...

Embodiment 2

[0021] like figure 1 As shown, the preparation method of the composite polytetrafluoroethylene and ultra-high modulus polyethylene filter membrane in this example includes the following steps: (1) raw material component A: a mixture of white oil and polytetrafluoroethylene and component B : The mixture of white oil and ultra-high modulus polyethylene is fed from the two plunger pumps of the three-piston pump extruder respectively. The weight ratio of white oil and polytetrafluoroethylene in component A is 85:15. The weight ratio of white oil to ultra-high modulus polyethylene in part B is 90:10; (2) Introduce component A and component B in the step (1) under the action of a three-piston pump extruder The micro-layer co-extrusion device extrudes 200 layers of laminated materials through the micro-layer co-extrusion device; (3) The laminated material prepared in step (2) enters the hanger die and is extruded into 200 layers and a thickness of 500um melt film; (4) the melt film ...

Embodiment 3

[0023] like figure 1 As shown, the preparation method of the composite polytetrafluoroethylene and ultra-high modulus polyethylene filter membrane in this example includes the following steps: (1) raw material component A: a mixture of white oil and polytetrafluoroethylene and component B : The mixture of white oil and ultra-high modulus polyethylene is fed from the two plunger pumps of the double plunger pump extruder respectively. The weight ratio of white oil and polytetrafluoroethylene in component A is 90:10. The weight ratio of white oil to ultra-high modulus polyethylene in part B is 80:10; (2) Introduce component A and component B in the step (1) under the action of a double plunger pump extruder The micro-layer co-extrusion device extrudes 300 layers of laminated materials through the micro-layer co-extrusion device; (3) The laminated material prepared in step (2) enters the hanger die and is extruded into 300 layers and a thickness of 1000um melt film; (4) the melt ...

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Abstract

The invention discloses a method for preparing a composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane. The method comprises the following steps: (1) separately feeding a raw material ingredient A and a raw material ingredient B from two plunger pumps of a plunger pump extruder; (2) introducing the ingredient A and the ingredient B in the step (1) into a microlayer co-extruding device under the action of the plunger pump extruder; (3) feeding a stacked material prepared in the step (2) to a hanger die, and extruding the stacked material into membrane melt; and (4) gradually thinning the membrane melt under the action of a drawing system with the temperature of 70 DEG C to 90 DEG C and the drawing speed of 30 meters per minute, thereby preparing the composite polytetrafluoroethylene and ultrahigh-modulus polyethylene filtering membrane. According to the method, polytetrafluoroethylene and polyethylene are of gap distribution, similarly, the polyethylene serves as a skeleton, the resistance to deformation is enhanced, the stress of the filtering membrane during service can be withstood, and the deformation is resisted, so that the filtering membrane can better meet the social needs on industrial filtering membranes.

Description

technical field [0001] The invention belongs to the technical field of nano non-woven material preparation, and in particular relates to a preparation method of a composite polytetrafluoroethylene and ultrahigh modulus polyethylene filter membrane. Background technique [0002] Micro-layer co-extrusion technology has been developed for decades, but it has only been popularized and applied locally, and more are in the laboratory research stage. [0003] Micro-layer co-extrusion technology refers to the co-extrusion of two or more polymers to form dozens of layers or even thousands of layers of alternating multi-layer composite materials, and the thickness of a single layer can be as thin as micronano. Microlayer coextrusion technology enables in-situ fiber formation of functional filler components in polymer matrices to prepare high performance and functionalized alternating multilayer composites. [0004] Micro-layer co-extrusion technology can combine the excellent propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/36B01D71/26B01D69/12B01D69/02
Inventor 张迎晨吴红艳张夏楠刘迪杨强吕美佳张文娟朱玉娟朱鹏程刘义王科峰肖美红郝克倩张登科申新余
Owner ZHONGYUAN ENGINEERING COLLEGE