CN213138069U

CN213138069U - High-filtration type nano melt-blown fabric

Info

Publication number: CN213138069U
Application number: CN202021576241.8U
Authority: CN
Inventors: 钟振海
Original assignee: Wenzhou Baide Medical Equipment Co ltd
Current assignee: Wenzhou Baide Medical Equipment Co ltd
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2021-05-07
Anticipated expiration: 2030-07-25

Abstract

The invention discloses high-filtration type nano melt-blown cloth applied to a medical (civil) mask, which comprises a melt-blown cloth base layer (3), wherein a nano fiber filter layer (2) is arranged on the surface of the melt-blown cloth base layer. The outer surface of the nanofiber filter layer (2) is provided with a non-woven fabric layer (1). The invention is applied to a medical mask, effectively blocks PM0.3, is rich in nano-fiber and antibacterial components, and can keep longer-acting electrostatic effect on a melt-blown cloth base layer through a double-layer design. The air filter has the advantages of high efficiency of trapping and blocking particulate matters such as PM0.3 pollen, spray and hair in the air, realization of finer twice filtration, small breathing resistance in the use process, no generation of stronger stuffy feeling, and effective inhibition or killing of harmful viruses, germs and the like, thereby reducing the occurrence of anaphylactic reaction.

Description

High-filtration type nano melt-blown fabric

Technical Field

The invention relates to a protective article, in particular to melt-blown cloth for a medical (civil) mask.

Background

At present, the melt-blown fabric is the heart of a medical (civil) mask, is used as a filter layer in the middle of the mask, and has good filterability, barrier property, heat preservation property and adsorbability. The special material for melt-blown fabric polypropylene is a core raw material for producing melt-blown fabric. The performance of the melt-blown fabric is related to the spinning process on one hand, and the special material for melt-blowing plays a key role in the performance of the melt-blown fabric on the other hand. The molten spray must have good fluidity and require additional special functions such as sterilization, anti-virus, etc. At present, high-melt index polypropylene is mostly selected for melt-blown material products to meet the flowability, and then some auxiliary agents are added to endow the melt-blown material products with the bactericidal lamp functionality, but the following problems exist: the better spinnability can be achieved only when the spinning temperature is higher; the electret treatment effect can not be guaranteed in the spinning process, and the electric quantity is uncontrollable. If electret melt-blown cloth is adopted, the corona discharge mode is adopted, so that the common melt-blown cloth is charged, and the trapping and filtering of particles are improved. However, the breathing resistance is high, the wearing comfort is low, once the electret effect of the melt-blown fabric is failed, the filtering efficiency is extremely reduced, the service time is short, and the applied medical mask has certain potential safety hazard.

Disclosure of Invention

The invention aims to overcome the defects and provide a high-filtration type nano melt-blown fabric which can realize finer filtration and can keep static electricity for a long time and effectively.

The purpose of the invention is realized by the following technical scheme: the high-filtration type nano melt-blown fabric comprises a melt-blown fabric base layer, wherein a nano fiber filter layer is arranged on the surface of the melt-blown fabric base layer.

And a non-woven fabric layer is arranged on the outer surface of the nanofiber filtering layer.

After the invention is adopted, a thinner and thinner hole channel is formed by the double-layer design of the melt-blown cloth base layer and the nano fiber filter layer, thereby effectively preventing charge drift and enabling the melt-blown cloth base layer to keep longer-acting electrostatic effect. The nano-fiber is produced by utilizing the electrostatic spinning technology, the diameter of the nano-fiber is between the unit number and 1 thousand nanometers, the pore size is large, the porosity is high, the specific surface area is large, and the melt-blown cloth base layer is provided with static electricity, so that the effect of blocking 0.3 mu m micro-particles is obvious. The invention is applied to a medical mask, effectively blocks PM0.3, is rich in nano-fiber and antibacterial components, has high trapping and blocking efficiency on PM0.3 pollen, spray, hair and other particles in the air, realizes more precise twice filtration, has small respiratory resistance in the use process, does not generate stronger stuffy feeling, can effectively inhibit or kill harmful viruses, germs and the like, and thus reduces the occurrence of anaphylactic reaction.

Drawings

FIG. 1 is a schematic structural diagram of a high-filtration nano meltblown fabric according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and embodiments.

Referring to fig. 1, the high-filtration type nano meltblown applied to a medical (civil) mask of the present invention includes a meltblown base layer 3, and a nanofiber filter layer 2 is disposed on a surface of the meltblown base layer 3. The outer surface of the nanofiber filter layer 2 is provided with a non-woven fabric layer 1 (as the inner side surface of the medical mask), namely, the nanofiber filter layer 2 is positioned between the meltblown fabric base layer 3 and the non-woven fabric layer 1. This nonwoven fabric layer 1 may also be a second meltblown nonwoven fabric layer (also a meltblown fabric material).

The manufacturing process of the high-filtration type nano melt-blown fabric comprises the following steps: the melt-blown fabric base layer (reel type) is sequentially paved and conveyed through unreeling treatment, a nanofiber filter layer is formed on the surface of the melt-blown fabric base layer in an electrostatic spinning technology spraying mode, and then the melt-blown fabric base layer is dried, sterilized and finally rolled to obtain a high-filtration type nano melt-blown fabric finished product. The reaction temperature, the extrusion spraying rate and the receiving distance in the electrostatic spinning technology are known technologies.

The preparation raw material of the nanofiber filter layer is a solution composed of one or more polymers of polyvinylidene fluoride (PVDF), Polyacrylonitrile (PAN), polyether sulfone resin (PES), Polystyrene (PS) and Polytetrafluoroethylene (PTFE) and a solvent (and an auxiliary agent). The diameter of the nano-fiber in the nano-fiber filter layer is 8-1200 nm. The gram weight of the melt-blown fabric base layer is 20-60g/m²(ii) a The nanofiber filter layer is in the shape of a membrane (also called nanofiber filter membrane), and the gram weight of the nanofiber filter layer is 1.0-3.0g/m²。

The testing particles are 0.3 mu m, and the air resistance of the medical (civil) mask applied by the high-filtration type nano melt-blown fabric is 50-150pa and the filtration effect is 95-99.9 percent through the test of a special tester, so the high-filtration type nano melt-blown fabric has obvious beneficial effect.

Claims

1. High filtration formula nanometer melt-blown fabric, including melt-blown fabric basic unit (3), its characterized in that: the surface of the melt-blown fabric base layer (3) is provided with a nanofiber filter layer (2), the outer surface of the nanofiber filter layer (2) is provided with a non-woven fabric layer (1), the nanofiber filter layer (2) is in a membrane shape, and the non-woven fabric layer (1) is a second melt-blown non-woven fabric layer.

2. The high filtration nano meltblown of claim 1, wherein: the gram weight of the melt-blown fabric base layer is 20-60g/m²The gram weight of the nanofiber filter layer is 1.0-3.0g/m²。