Production device and production method of multi-layer composite nanofiber filtering membrane

A nanofiber and multi-layer composite technology, applied in the field of filtration membrane, can solve the problems of low filtration efficiency, poor strength, and inability to directly apply filtration, etc., to avoid damage to the formed membrane, high flux, and good dirt holding capacity effect of ability

Inactive Publication Date: 2020-01-07
HANGZHOU DEEFINE FILTRATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For industrialization, needle-free electrospinning technology has been invented abroad, which greatly improves production efficiency. In order to improve production efficiency, the spinning thickness is generally very thin, only about 10μm-20μm. This material is called membrane embryo, because of its The strength is poor, and the filtration efficiency does not meet our requirements. It cannot be directly applied to filtration. It must be compounded to improve its tensile strength and filtration efficiency.

Method used

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  • Production device and production method of multi-layer composite nanofiber filtering membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Place a nylon-66 nanofiber membrane embryo with a filtration accuracy of 1 micron and a filtration efficiency of 99.99% or more on the first unwinding roller 51, and place a polypropylene ultrafine meltblown non-woven substrate on the second unwinding roller 52. The third On the unwinding roller 53, there is a nylon-66 nanofiber membrane embryo with a filtration accuracy of 0.45 microns and a filtration efficiency of 99.99% or more. First, the three types of membrane embryos are passed through the unheated first hot oil roller 41 and the second hot oil in order. Between the oil rollers 42, and then wind a part to the winding roller 43, turn on the hot air system, adjust the temperature to 50-60°C, maintain the temperature in the isolation compartment 2, and turn on the heat transfer oil system for the first hot oil roller 41 and the second hot oil The roller 42 is heated to 150°C to reach the micro melting point of the meltblown ultrafine nonwoven material. The melting po...

Embodiment 2

[0029] Place a nylon-66 nanofiber membrane embryo with a filtration accuracy of 1 micron and a filtration efficiency of 99.99% or more on the first unwinding roller 51, and place a polypropylene ultrafine meltblown non-woven substrate on the second unwinding roller 52. The third On the unwinding roller 53, there is a nylon-66 nanofiber membrane embryo with a filtration accuracy of 0.45 microns and a filtration efficiency of 99.99% or more. First, the three types of membrane embryos are passed through the unheated first hot oil roller 41 and the second hot oil in order. Between the oil rollers 42, and then wind a part to the winding roller 43, turn on the hot air system, adjust the temperature to 50-60°C, maintain the temperature in the isolation compartment 2, and turn on the heat transfer oil system for the first hot oil roller 41 and the second hot oil The roller 42 is heated to 160°C to reach the micro-melting point of the melt-blown ultra-fine non-woven material. The melting...

Embodiment 3

[0031] Place a nylon-66 nanofiber membrane embryo with a filtration accuracy of 1 micron and a filtration efficiency of 99.99% or more on the first unwinding roller 51, and place a polypropylene ultrafine meltblown non-woven substrate on the second unwinding roller 52. The third On the unwinding roller 53, there is a nylon-66 nanofiber membrane embryo with a filtration accuracy of 0.45 microns and a filtration efficiency of 99.99% or more. First, the three types of membrane embryos are passed through the unheated first hot oil roller 41 and the second hot oil in order. Between the oil rollers 42, and then wind a part to the winding roller 43, turn on the hot air system, adjust the temperature to 50-60°C, maintain the temperature in the isolation compartment 2, and turn on the heat transfer oil system for the first hot oil roller 41 and the second hot oil The roller 42 is heated to 170°C to reach the micro-melting point of the melt-blown ultra-fine non-woven material, and the mel...

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Abstract

The invention belongs to the technical field of filtering membranes, and relates to a production device and a production method of a multi-layer composite nanofiber filtering membrane. According to the device, a work table is provided with a first installing frame and a second installing frame in an isolation cabin; a first hot oil roller and a second hot oil roller are mounted on the first installing frame; two stepping motors respectively forming transmission connection with the first hot oil roller and the second hot oil roller respectively are mounted on the first installing frame; the first hot oil roller and the second hot oil roller are respectively connected to a heat conduction oil heater; a winding roller is movably mounted on the first installing frame, and is driven to rotate by the first hot oil roller; and the second installing frame is provided with a first unwinding roller, a second unwinding roller and a third unwinding roller. According to the invention, the work table is provided with a tension control system and a hot air system in the isolation bin, such that the molded film damage caused by tension in the production process can be avoided while the prepared nanofiber membrane has good dirt containing capacity and high flux in the case of high filtering precision.

Description

Technical field [0001] The invention belongs to the technical field of filtration membranes, and specifically relates to a production device and a production method of a multilayer composite nanofiber filtration membrane. Background technique [0002] At present, nanofiber membranes are widely used as filter materials due to their high porosity, good pore size connectivity, large specific surface area, and strong adsorption and filtration performance. Electrospinning is currently one of the main methods for manufacturing nanofibers. Electrospinning technology has been repeatedly mentioned since the 1990s, and it is being studied by all major domestic universities. The so-called electrospinning nanofiber membrane is The molecular material is dissolved in a solvent, and a high-voltage electrostatic field is applied to the feeding end, and an opposite high-voltage electrostatic field is applied to the receiving end, so that the polymer material solution can become filaments under st...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00
CPCB01D67/0002B01D69/12
Inventor张凌霄李圣泉
OwnerHANGZHOU DEEFINE FILTRATION TECH