CN114134636A

CN114134636A - Self-disinfecting melt-blown nonwoven fabric

Info

Publication number: CN114134636A
Application number: CN202111393139.3A
Authority: CN
Inventors: 王久儒; 王胜; 梁向阳; 卢晓玥
Original assignee: Qingdao Xinjing Medical Technology Co ltd
Current assignee: Qingdao Xinjing Medical Technology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-04

Abstract

A melt-blown non-woven fabric which can achieve 99.6 percent of antibacterial effect and can automatically kill bacteria and viruses attached to the surface of the non-woven fabric is called a self-disinfecting non-woven fabric. Consisting of polypropylene PP and a specific disinfecting ingredient: lilac extract hydrochloride polyhexamethylene guanidine, ilex latifolia extract alkaloid, dandelion extract polysaccharide, honeysuckle extract aromatic hydrocarbon substances, marine organism chitosan, marine organism enzyme polypeptide and the like, and the preparation method is carried out by a special process. The product can be used in disposable protective clothing, epidemic prevention clothing, non-woven fabric mask, sterilization wrapping cloth and various non-woven fabrics in daily life. The invention has the following advantages: the disinfection component can form a new material with special functions with the PP material in the forming process of the non-woven fabric, so as to achieve permanent disinfection. The biocompatibility exceeds the national standard, and is safer and more effective than other anions and copper ion antibacterial non-woven fabrics. The deodorizing mask made of non-woven fabrics is self-disinfecting protective clothing, and the risk of cross infection is reduced.

Description

Self-disinfecting melt-blown nonwoven fabric

Technical Field

The invention relates to the field of functional special high polymer materials. The biological disinfectant component and the polypropylene material are subjected to polymerization and addition reaction under certain conditions, so that the original polypropylene material has a disinfection function, and a self-disinfection function is achieved. The non-woven fabric made of the material becomes the self-disinfection non-woven fabric. The non-woven fabric material can be used as protective mask for epidemic prevention clothing, medical mask, surgical mask, etc.

Background

The self-disinfecting non-woven fabric adopts a biological disinfectant, and the stability and the temperature resistance of biological components can reach more than 190 ℃ through professional technology. Then the components and the main component polypropylene of the non-woven fabric are subjected to chemical reaction under certain conditions to form a special material containing the disinfection functional group component, so that the non-woven fabric has a self-disinfection function;

at present, some non-woven fabric materials with antibacterial function are also available in the market, and the materials are mainly formed by blending a layer of silver ions or copper ions on the surface of non-woven fabric or with the non-woven fabric, so that disinfection is achieved through the metal ion sterilization effect. Traditional copper ions and silver ions mainly rely on their heavy metal effect to achieve disinfection effect, and therefore have certain toxicity no matter how they are treated. In addition, copper ions and silver ions migrate in the material, and these metal ions also cause chronic poisoning. Silver ions and copper ions are used as antibacterial components, and the antibacterial effect is extremely limited;

the invention uses biological disinfectant, which mainly comprises lilac extract hydrochloride polyhexamethylene guanidine, ilex Kudingcha extract alkaloid (Kudingcha), dandelion extract (Dandelium) polysaccharide, marine organism chitosan and other substances. After special treatment, the components can resist temperature of more than 190 ℃ and still can maintain the disinfection effect. The biological disinfection component in the invention is nontoxic, non-irritant and non-migratory, and can react with the polypropylene material, so that the functional group with the disinfection function is combined with the polypropylene material to form a new high polymer material with the disinfection function;

the novel high polymer material can achieve the disinfection effect when used in protective clothing, masks and medical materials in epidemic situation normalization, and reduces the risk in the epidemic situation prevention and control process. Can be used as epidemic situation prevention and control material storage.

Disclosure of Invention

The biological disinfectant mainly comprises substances such as lilac extract hydrochloride polyhexamethylene guanidine, ilex latifolia extract alkaloid (Kudingcha), dandelion extract (Dandelium) polysaccharide, marine organism chitosan and the like. The covalent bond in the plant extract and the covalent bond of the polypropylene generate addition reaction, and the disinfection and antibacterial functional group in the extract component is grafted to the polypropylene material, so that the polypropylene material has a disinfection function and can keep long-term property. The killing rate of escherichia coli, staphylococcus aureus, pseudomonas aeruginosa and candida albicans reaches more than 99.6 percent;

the product has activity and extremely high stability, the effective period can reach more than 5 years, and the disinfection effectiveness can be ensured when the product is subjected to high temperature of 180 ℃ or higher;

the formula selected by the invention is as follows (components and weight percentage):

2.0-5.0 parts of plant alkaloid extract, 2.0-5.0 parts of plant polysaccharide extract, 0.1-0.5 part of marine organism chitosan, 0.6-2.0 parts of lilac extract hydrochloride polyhexamethylene guanidine, and the balance of high molecular polypropylene granules added to 100 parts;

the alkaloid extracted from the broadleaf holly leaf has positive charges, belongs to a surfactant, can reduce the surface tension of microorganisms, has strong destructive power on the outer surfaces of the microorganisms due to the activity of the alkaloid, and can quickly decompose proteins on the surfaces of the bacteria. Meanwhile, the alkaloid can generate resonance effect with the covalent bonds in the bacteria body through a large number of covalent bonds, and energy is transferred to organic matters in the microorganisms body. Therefore, it has excellent flexibility and bactericidal property;

the polysaccharide extracted from herba Taraxaci has high molecular weight, and can rapidly capture virus and bacteria under the combined action of its activity, polarity and viscosity, and attach to the surface. Through its activity, it can bind to the protein structure of bacteria, fungi and viruses, and change the membrane channels of fungi and bacteria, thus killing the bacteria. The polysaccharide extracted from the plant has obvious killing effect on AIDS virus, herpes simplex virus, influenza virus, saccular gastritis virus staphylococcus aureus, gram positive bacteria, gram negative bacteria, pseudomonas aeruginosa, escherichia coli and the like. Meanwhile, the addition of the plant polysaccharides plays a great role in the stability of the whole product system;

the chitosan extracted from marine organisms has obvious bactericidal effect, and a large amount of positive charges are enriched on the surface of the chitosan, and the charges can interfere the synthesis and replication of DNA and RNA of harmful microorganisms so as to achieve the bactericidal effect; the chitosan extracted from marine organisms has obvious killing effect on escherichia coli, staphylococcus aureus, salmonella, enveloped viruses and the like;

one end of guanidino in the hydrochloride polyhexamethylene guanidine has high activity, so that the polymer is electropositive, is easily adsorbed by bacteria and viruses to dissolve lipid, changes the permeability of bacterial cell membranes, prevents metabolism in bacteria from generating barriers to inhibit the division function of the bacteria and the viruses, and loses the reproductive capacity. The hydrochloride polyhexamethylene guanidine has good bactericidal effect on bacterial propagules, fungi, gram-positive and gram-negative bacteria, mould and partial viruses;

the large molecules of the plant extract have a large number of unsaturated chemical bonds, and the chemical bonds and the unsaturated chemical bonds in the polypropylene have addition reaction, so that the components with the disinfection effect are grafted to the plastic material, and the long-term disinfection function is achieved, the self-disinfection antibacterial non-woven fabric achieves the antibacterial performance far higher than 90 percent of that required by the national standard, reaches 99.6 percent, and has excellent antibacterial effect;

the specific implementation mode is as follows: the present invention will be described in further detail with reference to the following examples:

the configuration was carried out according to the data (in% by weight) listed in the following table and the procedure described therein:

the formula I is as follows:

folium Ilicis alkaloid 2.0-5.0

Dandelion polysaccharide 2.0-5.0

Marine organism chitin 0.1-0.5

Hydrochloride polyhexamethylene guanidine 0.6-1.0

Polypropylene pellets to 100

And a second formula:

folium Ilicis alkaloid 2.0-8.0

Dandelion polysaccharide 2.0-6.0

Marine organism chitin 0.3-0.8

Hydrochloride polyhexamethylene guanidine 0.6-1.0

Polypropylene pellets to 100

And the formula III:

folium Ilicis alkaloid 2.0-50

Dandelion polysaccharide 2.0-5.0

Marine organism chitin 0.6-1.5

Hydrochloride polyhexamethylene guanidine 0.3-0.8

Polypropylene pellets to 100.

Claims

1. The self-disinfecting melt-blown non-woven fabric is prepared by the steps of uniformly mixing a biological disinfectant, namely lilac extract hydrochloride polyhexamethylene guanidine, broadleaf holly extract alkaloid (Kudingcha), dandelion extract (Dandelium) polysaccharide and marine biological chitosan, with melt-blown polypropylene through a special process, and carrying out polymerization reaction on the components and the polypropylene material under the conditions of high temperature and the like in the melt extrusion process to enable the polypropylene material to have functional groups of disinfecting components, so that a special high polymer material is formed, and the high polymer material has a self-disinfecting function.

2. The self-disinfecting meltblown of claim 1 comprising the following (components and weight percentages thereof): 2.0-5.0 parts of plant alkaloid extract, 2.0-5.0 parts of plant polysaccharide extract, 0.1-0.5 part of marine organism chitosan, 0.6-2.0 parts of lilac extract hydrochloride polyhexamethylene guanidine and the balance of high molecular polypropylene material.

3. The alkaloid, plant polysaccharide, marine organism chitosan, etc. extract as claimed in claim 2 is the same kind of substance extracted from different plants or marine organisms, not only the substance mentioned in claim 1.

4. The method for preparing a disinfectant biological agent for disinfecting the surfaces of environmental substances according to any one of claims 1 to 2, comprising the steps of:

(1) crushing broadleaf holly leaf and dandelion into 200 meshes, performing aqueous extraction, adsorbing and decoloring by activated carbon, and concentrating to the required concentration for later use;

(2) preparing the marine organism chitosan in proportion for later use;

(3) diluting the lilac extract hydrochloride polyhexamethylene guanidine to a certain concentration for later use;

(4) adding a proper amount of water into a stirring tank, heating to 40 ℃, slowly adding chitosan, and stirring for 10min until the chitosan is completely dissolved;

(5) adding the hydrochloride polyhexamethylene guanidine into a stirring tank, stirring for 20min, and cooling to normal temperature, wherein the temperature is about 25 ℃;

(6) sequentially adding plant polysaccharide extract and alkaloid extract, and stirring for 15 min;

(7) uniformly mixing the above liquids, soaking 20% of PP granules in the above liquid, and drying the liquid and granules together;

(8) adding the granules (mother material for short) added with the disinfection components in the claim 7 into PP granules needing melt extrusion, uniformly mixing, and uniformly mixing the mother material and the granules for later use;

(9) feeding the uniformly mixed master batch and granules into a machine, melting and extruding, blowing the melt leaving a spinneret orifice into superfine fibers under the action of high-speed hot air, flying to a mesh belt at a very high speed, then forming, cooling and forming a net by thermal bonding or self bonding and reinforcing the fibers, and finally reinforcing the net into cloth;

(10) then rolling and storing the materials, processing the materials into coiled materials with different gram weights according to the requirements of customers, and using the coiled materials for processing finished products of protective clothing, masks, diapers and the like;

(11) the antibacterial property of the functional special material, namely the non-woven fabric, is far higher than the national standard requirement by 90 percent, namely the antibacterial requirement is achieved, and the antibacterial property reaches more than 99.6 percent.

5. According to the claim of 4, the melt-extrusion conditions are not lower than 190 ℃ and not higher than 230 ℃.