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Preparation method of high hydrostatic strength polytetrafluoroethylene hollow fiber membrane

A technology of polytetrafluoroethylene and hydrostatic strength, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reducing the service life of polytetrafluoroethylene hollow fiber membranes, and achieve low cost, static pressure The effect of high hydraulic strength and simple process

Active Publication Date: 2019-06-21
山东格瑞沃特环保科技有限公司
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Problems solved by technology

This defect greatly reduces the service life of the PTFE hollow fiber membrane

Method used

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  • Preparation method of high hydrostatic strength polytetrafluoroethylene hollow fiber membrane
  • Preparation method of high hydrostatic strength polytetrafluoroethylene hollow fiber membrane
  • Preparation method of high hydrostatic strength polytetrafluoroethylene hollow fiber membrane

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples.

[0023] In order to overcome all or part of the deficiencies in the prior art, an embodiment of the present invention provides a method for preparing a polytetrafluoroethylene hollow fiber membrane with high hydrostatic strength. The preparation method includes the following steps:

[0024] (1) Mixing and aging: Mix PTFE (polytetrafluoroethylene) resin powder, liquid lubricating oil, and PTFE ultra-fine short fibers evenly, and let the resin powder and liquid The lubricant is fully mixed to form a PTFE material;

[0025] (2) Paste extrusion: The PTFE material is pressed into a tubular blank on a compactor at 30-50°C, and the tubular blank is extruded at a temperature of 40-60°C through a pusher to form PTFE pipe;

[0026] (3) Degreasing and axial stretching: Dry the PTFE...

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Abstract

The invention discloses a preparation method of a high hydrostatic strength polytetrafluoroethylene hollow fiber membrane, and relates to the technical field of preparation of hollow fiber membranes.The high hydrostatic strength polytetrafluoroethylene hollow fiber membrane is prepared by mixing polytetrafluoroethylene resin powder, liquid lubricating oil and a polytetrafluoroethylene ultrafine short fiber, and performing processes such as curing, paste extrusion, degreasing, axial stretching and thermal setting on the mixture. The polytetrafluoroethylene hollow fiber membrane prepared by thepreparation method disclosed by the invention has high hydrostatic strength and is low in cost, and the processes are simple.

Description

technical field [0001] The invention relates to the technical field of preparation methods of hollow fiber membranes, in particular to a preparation method of polytetrafluoroethylene hollow fiber membranes with high hydrostatic strength. Background technique [0002] The stretched PTFE microporous membrane has the characteristics of high porosity, adjustable pore size, high and low temperature resistance, corrosion resistance, and microbial attack resistance, and has very important application value in the field of membrane separation. At present, the PTFE microporous membranes on the market mainly include flat-plate membranes and hollow fiber membranes, which use dispersed PTFE resins, which can form a "fibril-node" microstructure under shearing action. Fibers and nodes form micropores. The processing process of flat film is generally the main processes such as mixing of raw materials and lubricating oil, aging, paste extrusion, calendering, degreasing, stretching, sinteri...

Claims

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Application Information

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IPC IPC(8): B01D71/36B01D69/08B01D69/02B01D67/00
Inventor 李德敏
Owner 山东格瑞沃特环保科技有限公司
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