阅读说明：本技术 一种抗菌熔喷材料及其制备方法和应用 (Antibacterial melt-blown material and preparation method and application thereof ) 是由 李振华 杨友强 周日敏 杨方强 魏金刚 陈振树 陶俊浩 丁超 陈平绪 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种抗菌熔喷材料及其制备方法和应用,本发明采用熔喷聚丙烯树脂作为基体材料,利用较大熔融指数的金属离子聚合物,以及通过对水驻极母粒配方的改进,采用受阻胺和硬脂酸盐作为有机驻极剂,在配方改进的基础上,采用水驻极处理,所制得的熔喷材料不仅具有抗菌效果,而且对空气中微小粒子过滤效率高,可广泛应用于制备抗菌过滤材料。(The invention discloses an antibacterial melt-blown material and a preparation method and application thereof, wherein melt-blown polypropylene resin is used as a base material, a metal ion polymer with a larger melt index is utilized, hindered amine and stearate are used as organic electret agents through improving a formula of a water electret master batch, and water electret treatment is adopted on the basis of formula improvement.)

1. The antibacterial melt-blown material is characterized by comprising the following components in parts by mass:

92-95 parts of melt-blown polypropylene resin;

1-5 parts of a metal ion polymer;

3-6 parts of water electret master batch;

the metal ion polymer is polyethylene resin containing metal ions, and the melt index of the polyethylene resin containing metal ions is more than or equal to 50g/10 min; the components of the water electret master batch comprise melt-blown polypropylene and an organic electret, the organic electret is hindered amine and stearate, and the antibacterial melt-blown material is prepared by adopting water electret treatment.

2. The antibacterial melt-blown material according to claim 1, which comprises the following components in parts by mass:

92-94 parts of melt-blown polypropylene resin;

2-3 parts of a metal ion polymer;

4-5 parts of water electret master batch.

3. The antibacterial melt-blown material according to claim 1 or 2, wherein the melt index of the metal ion-containing polyethylene resin is 50 to 80g/10 min.

4. The antibacterial melt-blown material according to claim 1, wherein the metal ions are one or more of copper, silver, zinc and nickel ions.

5. The antibacterial melt-blown material according to claim 1, wherein the mass content of the polyethylene resin in the metal ion polymer is 85-90%.

6. The antibacterial melt-blown material according to claim 1, wherein the water electret master batch is prepared by mixing, by mass, 85-95 parts of melt-blown polypropylene and 5-15 parts of an organic electret.

7. The antibacterial meltblown material according to claim 1 wherein said stearate is zinc stearate and/or magnesium stearate.

8. A method for preparing the antibacterial melt-blown material according to any one of claims 1 to 7, which is characterized by comprising the following steps:

the melt-blown polypropylene resin, the metal ion polymer and the water electret master batch are uniformly mixed, melt-blown spinning is carried out to prepare non-woven fabric, and then the non-woven fabric is subjected to water electret treatment to prepare the antibacterial melt-blown material.

9. Use of the antibacterial melt-blown material according to any one of claims 1 to 7 in the preparation of a filter material.

10. An antibacterial mask comprising the antibacterial meltblown material according to any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of air filter materials, in particular to an antibacterial melt-blown material and a preparation method and application thereof.

Background

The filtering material is generally used when the air quality of the closed environment is poor, such as a mask and the like, and has a certain filtering effect. Chinese patent CN103520999A discloses an antibacterial composite nanofiber high-efficiency air filtering material and a preparation method thereof, mainly used in the fields of mask protective face masks, protective clothing and the like, the high-efficiency air filtering material is formed by electrostatic spinning, and sequentially comprises a non-woven fabric supporting layer, an antibacterial fiber and micron fiber blended filtering layer and a nanofiber filtering layer, and harmful gas containing bacteria and viruses passes through the filtering material, so that the filtering material has a certain filtering effect and is anti-toxic and antibacterial. However, the antibacterial filter material needs to be additionally provided with an antibacterial layer, needs to be provided with a multilayer structure, needs to be manufactured by combining an electrostatic spinning process, can ensure a higher filtering effect, and has complex preparation steps.

Disclosure of Invention

The invention aims to solve the technical problems that the existing filtering material with the antibacterial effect has a multilayer structure and can obtain the antibacterial and high-filtering-efficiency performance by combining an electrostatic spinning process with complicated preparation steps, and provides an antibacterial melt-blown material.

It is yet another object of the present invention to provide a method of making an antimicrobial meltblown material.

Another object of the present invention is to provide an application of the antibacterial meltblown material.

The above purpose of the invention is realized by the following technical scheme:

an antibacterial melt-blown material comprises the following components in parts by mass:

92-95 parts of melt-blown polypropylene resin;

1-5 parts of a metal ion polymer;

3-6 parts of water electret master batch;

the metal ion polymer is polyethylene resin containing metal ions, and the melt index of the polyethylene resin containing metal ions is more than or equal to 50g/10 min; the components of the water electret master batch comprise melt-blown polypropylene and an organic electret, the organic electret is hindered amine and stearate, and the antibacterial melt-blown material is prepared by adopting water electret treatment.

The invention adopts melt-blown polypropylene resin as a base material, utilizes metal ionic polymer with larger melt index, and adds organic electret agent with stronger charge storage capacity into the electret master batch through improving the formula of the water electret master batch, so that the melt-blown polypropylene resin can obtain good charge storage capacity after water electret treatment, thereby greatly improving the filtration efficiency of the non-woven material.

Preferably, the composition comprises the following components in parts by mass:

92-94 parts of melt-blown polypropylene resin;

2-3 parts of a metal ion polymer;

4-5 parts of water electret master batch.

Preferably, the melt index of the polyethylene resin containing metal ions is 50-80 g/10 min.

The test conditions of the melt index are as follows: 230 ℃ and 2.16Kg under the test conditions.

Preferably, the metal ions are one or more of copper, silver, zinc and nickel ions.

Preferably, the mass content of the polyethylene resin in the metal ion polymer is 85-90%.

Preferably, the preparation method of the metal ion polymer comprises the steps of uniformly mixing the polyethylene resin, the inorganic particles containing metal ions and the silicone oil dispersant, melting and extruding, wherein the temperature of each area of the screw is 190-230 ℃, and carrying out vacuum granulation to obtain the metal ion polymer.

Preferably, the prepared water electret master batch comprises 85-95 parts by mass of melt-blown polypropylene and 5-15 parts by mass of an organic electret.

Preferably, the stearate is zinc stearate and/or magnesium stearate.

Preferably, the preparation method of the water electret master batch comprises the following steps: and uniformly mixing the melt-blown polypropylene and the organic electret agent, melting and extruding, wherein the temperature of each area of the screw is 190-230 ℃, and carrying out vacuum granulation to obtain the water electret master batch.

The invention protects the preparation method of the antibacterial melt-blown material, which comprises the following steps:

the melt-blown polypropylene resin, the metal ion polymer and the water electret master batch are uniformly mixed, melt-blown spinning is carried out to prepare non-woven fabric, and then the non-woven fabric is subjected to water electret treatment to prepare the antibacterial melt-blown material.

The water electret treatment mode is to use high-pressure water to spray and treat the non-woven fabric and dry the moisture of the non-woven fabric after treatment.

The invention protects the application of the antibacterial melt-blown material in preparing a filter material.

An antibacterial mask comprises the antibacterial melt-blown material.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts melt-blown polypropylene resin as a base material, metal ionic polymer with larger melt index, and hindered amine and stearate as organic electret through improving the formula of the water electret master batch, and adopts water electret treatment on the basis of improving the formula, so that the prepared melt-blown material not only has antibacterial effect, but also has high filtering efficiency on tiny particles in air, and can be widely applied to preparing antibacterial filtering materials.

Detailed Description

The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.

The raw materials used in the respective examples and comparative examples:

melt blown polypropylene, Metocene MF650Y, basel;

1, water electret master batch: self-making, namely uniformly mixing melt-blown polypropylene and an electret agent (hindered amine 10 wt% + magnesium stearate 5 wt%), melting and extruding, wherein the temperature of each zone of a screw is 190-230 ℃, and carrying out vacuum granulation to obtain water electret master batches;

water electret master batch 2: commercially available, the main component is hindered amine 15 wt%;

silver ion polymer 1: the preparation method comprises the steps of uniformly mixing polyethylene resin (the melt index is 50g/10min), silver ion-containing inorganic particles and silicone oil dispersing agents, carrying out melt extrusion, and carrying out vacuum granulation at the temperature of 190-230 ℃ in each area of a screw to obtain the metal ion polymer.

Silver ion polymer 2: the preparation method comprises the steps of uniformly mixing the polyethylene resin (the melt index is 30g/10min), the inorganic particles containing the silver ions and the silicone oil dispersing agent, carrying out melt extrusion, and carrying out vacuum granulation at the temperature of 190-230 ℃ in each area of the screw to obtain the metal ion polymer.

Silver ion polymer 3: the preparation method comprises the steps of uniformly mixing the polyethylene resin (the melt index is 80g/10min), the inorganic particles containing the silver ions and the silicone oil dispersing agent, carrying out melt extrusion, and carrying out vacuum granulation at the temperature of 190-230 ℃ in each area of the screw to obtain the metal ion polymer.

Electro-electret master batch: commercially available under the trade designation YBL-EL032NC001, Jinfa science and technology, Inc.

Example 1

An antibacterial meltblown material comprising the components in parts by mass as shown in table 1 below.

The preparation method of the antibacterial melt-blown material comprises the following steps:

the air filtration melt-blown fabric material can be prepared by premixing melt-blown polypropylene resin, water electret master batches and metal ionic polymer in proportion, carrying out melt-blown spinning on the melt-blown machine to prepare non-woven fabric, and carrying out water electret treatment on the non-woven fabric.

Examples 2 to 8 and comparative examples 1 to 5

The components and their parts by mass of examples 2 to 8 and comparative examples 1 to 5 are shown in Table 1 below, and the preparation method thereof is the same as that of example 1.

TABLE 1 Components and parts by mass of examples and comparative examples

Performance testing

1. Test method

(1) Oily Particle Filtration Efficiency (PFE): test standard YY 0469-2011.

(2) And (3) testing the antibacterial rate: the bacterial number is measured by a colony counting method, the antibacterial rate is (average colony number of a control group-average colony number of a test group)/average colony number of the control group multiplied by 100 percent, and when the bactericidal rate is more than or equal to 90 percent, the product can be reported to have bactericidal effect.

2. Test results

TABLE 2 results of the performance test of each example and comparative example

As can be seen from table 2, the melt-blown material prepared in the embodiments 1 to 8 of the present invention not only has a higher filtering performance, but also has a better antibacterial property, and it can be obtained through the above embodiments and comparative examples that, compared to using commercially available electret masterbatches in the proportion of 3, the self-made water electret masterbatches can significantly improve the filtering efficiency of the filtering material, and especially the filtering efficiency of a nonwoven material with 50 g/square meter can reach 99.999%, the filtering capacity is excellent and exceeds the requirement of 99.97% filtering efficiency of an air filtering material, and meanwhile, the material with 25 g/square meter can also meet the requirement of the air filtering material for generality of 99.5%.

The content of the electret master batch and the metal ion polymer added in the comparative example 1 is only 1 part, the effective components are too small, and the filtering effect and the antibacterial effect are difficult to guarantee, although the antibacterial master batch added in the comparative example 2 can achieve a certain antibacterial effect, the filtering efficiency is too low to meet the requirement of general application because the specific water electret master batch is not added, and the metal ion polymer is not added in the comparative examples 3 and 4, so that the antibacterial effect is avoided, and the filtering efficiency is reduced to a certain extent; comparative example 5 a PE resin having a lower melt index was used as the matrix for the silver ion resin, and there was a significant decrease in filtration efficiency due to the poor compatibility of the meltblown with the metal ion polymer.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.