An air purification filter material

Abstract

This invention discloses an air purification filter material, comprising a protective layer and a support layer, with a particulate filter layer disposed between the protective layer and the support layer, and a gas-phase filter medium layer disposed between the particulate filter layer and the support layer. The protective layer and support layer are made of antibacterial non-woven fiber substrate; the particulate filter layer is made of antibacterial polytetrafluoroethylene microporous membrane substrate; and the gas-phase filter medium layer is made of a mixed substrate of activated alumina and activated carbon, with the activated alumina particles loaded with permanganate and the activated carbon loaded with polyquaternary ammonium salt. The air purification filter material of this invention has a highly efficient air purification effect while also possessing good antibacterial properties.

Description

Technical Field

[0001] This invention relates to an air purification filter material, belonging to the field of air purification technology. Background Technology

[0002] With increasingly higher demands for indoor air quality, air purification filter materials for air purification systems have become a key research focus. Various air purification filter materials have been developed, but most existing air purification materials rely on adsorption or physical interception, resulting in poor filtration performance and requiring frequent replacement. Furthermore, after long-term use, bacteria, viruses, and other bio-aerogels can proliferate on the filter materials, posing a danger to human health and the environment. Air filter materials with antibacterial functions are widely used, but existing filter materials have poor antibacterial effects. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides an air purification filter material that has a high-efficiency air purification effect and also has a good antibacterial effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an air purification filter material, comprising a protective layer and a support layer, wherein a particulate filter layer is disposed between the protective layer and the support layer, and a gas phase filter medium layer is disposed between the particulate filter layer and the support layer;

[0005] The protective layer and the support layer are made of antibacterial non-woven fiber substrate, and the protective layer and the support layer are not made of the same substrate.

[0006] The particulate filter layer uses an antibacterial polytetrafluoroethylene microporous membrane substrate.

[0007] The gas phase filtration medium layer uses a mixed substrate of activated alumina and activated carbon, with the activated alumina particles loaded with permanganate and the activated carbon loaded with polyquaternary ammonium salt.

[0008] Preferably, the antibacterial non-woven fiber substrate of the protective layer is an antibacterial modified polypropylene / polyamide meltblown non-woven fiber obtained by meltblowing technology from modified polypropylene and polyamide.

[0009] Preferably, the mass ratio of the modified polypropylene to polyamide is 7:3.

[0010] Preferably, the antibacterial non-woven fiber substrate of the support layer is an antibacterial modified polypropylene / polyester meltblown non-woven fiber obtained by meltblowing technology from modified polypropylene and polyester.

[0011] Preferably, the mass ratio of the modified polypropylene to the polyester is 6:4.

[0012] Preferably, the modified polypropylene is composed of the following raw materials and parts by weight: 60-70 parts of polypropylene, 4-8 parts of polyquaternium salt, and 3-6 parts of zinc oxide.

[0013] Preferably, the modified polypropylene is obtained by mixing and extruding polypropylene, polyquaternium salt, and zinc oxide as raw materials.

[0014] Preferably, the antibacterial polytetrafluoroethylene microporous membrane substrate is composed of the following raw materials and parts by weight: 65-77 parts polytetrafluoroethylene, 35-43 parts bamboo charcoal fiber, 20-28 parts petroleum, and 0.5-1 parts zinc stearate.

[0015] Preferably, the pore size of the antibacterial polytetrafluoroethylene microporous membrane substrate is 0.5 to 1.2 μm.

[0016] Preferably, the antibacterial polytetrafluoroethylene microporous membrane substrate is obtained by mixing, extruding, calendering, biaxial stretching, and shaping polytetrafluoroethylene, bamboo charcoal fiber, petroleum, and zinc stearate as raw materials.

[0017] Preferably, the specific surface area of ​​the activated alumina is 250–300 m² / g. 2 / g, wherein the specific surface area of ​​the activated carbon is 1200-2000 m² / g. 2 / g.

[0018] Preferably, the mass ratio of activated alumina to activated carbon is 5.6–5.85:4.15–4.4, and the bulk density of the mixed substrate is 0.65–0.7 g / cc.

[0019] Preferably, the amount of permanganate supported on the activated alumina is 4-15 wt%; and the amount of polyquaternary ammonium salt supported on the activated carbon is 5-14 wt%.

[0020] Preferably, the protective layer, particulate filter layer, gas phase filter medium layer, and support layer are hot-rolled composites.

[0021] The beneficial effects of this invention are as follows: The air purification filter material of this invention integrates a protective layer, a particulate filter layer, a gas phase filter medium layer, and a support layer. It has a highly efficient purification effect on both solid and gaseous pollutants in the air. Furthermore, the polyquaternary ammonium salt and zinc oxide loaded in the protective layer, support layer, and gas phase filter medium layer, combined with the bamboo charcoal fiber in the particulate filter layer, significantly enhance the antibacterial effect of the filter material while preventing bacterial regeneration. The protective layer and support layer of this invention are made of two-component meltblown non-woven fibers, resulting in low filtration resistance and larger micropores, which can improve the service life of the air purification filter material. The antibacterial polytetrafluoroethylene microporous membrane substrate of this invention uses polytetrafluoroethylene... The mixture primarily uses bamboo charcoal fiber, which allows negative ions to adhere to the particulate filter layer, resulting in excellent adsorption properties, high dust holding capacity, and superior filtration efficiency for particulate matter, dust, and bacteria, further extending the service life of the air purification filter material. The gas phase filter media layer of this invention is a mixture of activated alumina particles loaded with permanganate and activated carbon loaded with polyquaternary ammonium salt, combining physical and chemical adsorption to effectively remove organic pollutants from the air, effectively prevent secondary air pollution, and effectively kill bacteria. Furthermore, the protective layer, particulate filter layer, gas phase filter media layer, and support layer of this invention work synergistically to improve the uniformity of air purification and further enhance the antibacterial effect of the filter material. Detailed Implementation

[0022] To provide a clearer and more complete description of the present invention, specific embodiments are described below, but these are not intended to limit the invention.

[0023] Example 1

[0024] An air purification filter material is prepared by the following steps:

[0025] (1) Mix 60 parts of polypropylene, 4 parts of polyquaternary ammonium salt and 3 parts of zinc oxide. After mixing evenly, extrude and granulate the mixture using an extrusion granulation device to obtain modified polypropylene.

[0026] (2) The modified polypropylene and polyamide obtained in step (1) are mixed in a mass ratio of 7:3. After being mixed evenly, they are extruded and melted through a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled, and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is a protective layer for antibacterial non-woven fiber substrate.

[0027] (3) Mix 65 parts of polytetrafluoroethylene, 35 parts of bamboo charcoal fiber, 20 parts of petroleum and 0.5 parts of zinc stearate. After mixing evenly, the mixture is extruded into a columnar die material. The columnar die material is calendered by a calendering equipment and then heated to remove the petroleum to form a membrane. The membrane is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, the film is heat-set to obtain an antibacterial polytetrafluoroethylene microporous membrane substrate with a pore size of 0.5 μm, which is the particulate filter layer of the antibacterial polytetrafluoroethylene microporous membrane substrate.

[0028] (4) The modified polypropylene and polyester obtained in step (1) are mixed in a mass ratio of 6:4. After being mixed evenly, they are extruded and melted by a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is the support layer of antibacterial non-woven fiber substrate.

[0029] (5) With a specific surface area of ​​252m² 2 / g of activated alumina was sprayed at 60℃ in a 10.3wt% sodium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 6 hours to obtain activated alumina loaded with 4.1% sodium permanganate; with a specific surface area of ​​1220m² 2 / g of activated carbon was sprayed into an aqueous solution of polyquaternary ammonium salt with a concentration of 11.3wt%, and after being impregnated evenly, it was placed in a vacuum drying oven and dried at 90-100℃ for 8 hours to obtain activated carbon loaded with 5.1wt% polyquaternary ammonium salt. Then, activated alumina loaded with sodium permanganate and activated carbon loaded with polyquaternary ammonium salt were mixed at a mass ratio of 5.8:4.2 and mixed evenly to form a mixed substrate for the gas phase filter media layer.

[0030] (6) A mixed substrate with a bulk density of 0.65 g / cc obtained in step (5) is laid on the support layer obtained in step (4) to form a gas phase filter medium layer. The particulate filter layer obtained in step (3) is then laid on the gas phase filter medium layer, and the protective layer obtained in step (2) is then laid on the particulate filter layer to form a four-layer composite. The composite is then entered into a nonwoven hot rolling system and compounded by the pressure and heat of the upper and lower rollers to form an air purification filter material.

[0031] Example 2

[0032] An air purification filter material is prepared by the following steps:

[0033] (1) Mix 65 parts of polypropylene, 6 parts of polyquaternary ammonium salt and 4.5 parts of zinc oxide. After mixing evenly, granulate by extrusion granulation equipment to obtain modified polypropylene.

[0034] (2) The modified polypropylene and polyamide obtained in step (1) are mixed in a mass ratio of 7:3. After being mixed evenly, they are extruded and melted through a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled, and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is a protective layer for antibacterial non-woven fiber substrate.

[0035] (3) Mix 71 parts of polytetrafluoroethylene, 39 parts of bamboo charcoal fiber, 24 parts of petroleum and 0.75 parts of zinc stearate. After mixing evenly, the mixture is extruded into a columnar die material. The columnar die material is calendered by a calendering device and then heated to remove the petroleum to form a membrane. The membrane is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, the film is heat-set to obtain an antibacterial polytetrafluoroethylene microporous membrane substrate with a pore size of 0.8 μm, which is the particulate filter layer of the antibacterial polytetrafluoroethylene microporous membrane substrate.

[0036] (4) The modified polypropylene and polyester obtained in step (1) are mixed in a mass ratio of 6:4. After being mixed evenly, they are extruded and melted by a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is the support layer of antibacterial non-woven fiber substrate.

[0037] (5) With a specific surface area of ​​281m 2 / g of activated alumina was sprayed at 60℃ in a 24.9wt% sodium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 7 hours to obtain activated alumina loaded with 14.8wt% sodium permanganate; with a specific surface area of ​​1653m² 2 / g of activated carbon was sprayed into a polyquaternary ammonium salt aqueous solution with a concentration of 14.3wt%, and after being impregnated evenly, it was placed in a vacuum drying oven and dried at 90-100℃ for 8h to obtain activated carbon loaded with 6.2wt% polyquaternary ammonium salt. Then, activated alumina loaded with sodium permanganate and activated carbon loaded with polyquaternary ammonium salt were mixed at a mass ratio of 5.85:4.15 and mixed evenly to form a mixed substrate for the gas phase filter media layer.

[0038] (6) A mixed substrate with a bulk density of 0.68 g / cc obtained in step (5) is laid on the support layer obtained in step (4) to form a gas phase filter medium layer. A particulate filter layer obtained in step (3) is laid on the gas phase filter medium layer, and a protective layer obtained in step (2) is laid on the particulate filter layer to form a four-layer composite. Then, it enters the nonwoven hot rolling system and is composited by the pressure and heat of the upper and lower rollers to form an air purification filter material.

[0039] Example 3

[0040] An air purification filter material is prepared by the following steps:

[0041] (1) Mix 70 parts of polypropylene, 8 parts of polyquaternary ammonium salt and 6 parts of zinc oxide. After mixing evenly, extrude and granulate the mixture using an extrusion granulation device to obtain modified polypropylene.

[0042] (2) The modified polypropylene and polyamide obtained in step (1) are mixed in a mass ratio of 7:3. After being mixed evenly, they are extruded and melted through a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled, and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is a protective layer for antibacterial non-woven fiber substrate.

[0043] (3) Mix 77 parts of polytetrafluoroethylene, 43 parts of bamboo charcoal fiber, 28 parts of petroleum and 1 part of zinc stearate. After mixing evenly, the mixture is extruded into a columnar die material. The columnar die material is calendered by a calendering equipment and then heated to remove the petroleum to form a membrane. The membrane is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, the film is heat-set to obtain an antibacterial polytetrafluoroethylene microporous membrane substrate with a pore size of 1.2 μm, which is the particulate filter layer of the antibacterial polytetrafluoroethylene microporous membrane substrate.

[0044] (4) The modified polypropylene and polyester obtained in step (1) are mixed in a mass ratio of 6:4. After being mixed evenly, they are extruded and melted by a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is the support layer of antibacterial non-woven fiber substrate.

[0045] (5) With a specific surface area of ​​299m² 2 / g of activated alumina was sprayed at 60℃ in a 16.5wt% sodium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 8 hours to obtain activated alumina loaded with 8.2wt% sodium permanganate; with a specific surface area of ​​1998m² 2 / g of activated carbon was sprayed into a polyquaternary ammonium salt aqueous solution with a concentration of 16.7wt%, and after being impregnated evenly, it was placed in a vacuum drying oven and dried at 90-100℃ for 10h to obtain activated carbon loaded with 8.3wt% polyquaternary ammonium salt. Then, activated alumina loaded with sodium permanganate and activated carbon loaded with polyquaternary ammonium salt were mixed at a mass ratio of 5.6:4.4 and mixed evenly to form a mixed substrate for the gas phase filter media layer.

[0046] (6) A mixed substrate with a bulk density of 0.7 g / cc obtained in step (5) is laid on the support layer obtained in step (4) to form a gas phase filter medium layer. The particulate filter layer obtained in step (3) is then laid on the gas phase filter medium layer, and the protective layer obtained in step (2) is then laid on the particulate filter layer to form a four-layer composite. The composite is then entered into a nonwoven hot rolling system and compounded by the pressure and heat of the upper and lower rollers to form an air purification filter material.

[0047] Example 4

[0048] An air purification filter material is prepared by the following steps:

[0049] (1) Mix 68 parts of polypropylene, 4 parts of polyquaternary ammonium salt and 3 parts of zinc oxide. After mixing evenly, extrude and granulate the mixture using an extrusion granulation device to obtain modified polypropylene.

[0050] (2) The modified polypropylene and polyamide obtained in step (1) are mixed in a mass ratio of 7:3. After being mixed evenly, they are extruded and melted through a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled, and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is a protective layer for antibacterial non-woven fiber substrate.

[0051] (3) Mix 75 parts of polytetrafluoroethylene, 36 parts of bamboo charcoal fiber, 22 parts of petroleum and 0.6 parts of zinc stearate. After mixing evenly, the mixture is extruded into a columnar die material. The columnar die material is calendered by a calendering equipment and then heated to remove the petroleum to form a membrane. The membrane is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, the film is heat-set to obtain an antibacterial polytetrafluoroethylene microporous membrane substrate with a pore size of 0.6 μm, which is the particulate filter layer of the antibacterial polytetrafluoroethylene microporous membrane substrate.

[0052] (4) The modified polypropylene and polyester obtained in step (1) are mixed in a mass ratio of 6:4. After being mixed evenly, they are extruded and melted by a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is the support layer of antibacterial non-woven fiber substrate.

[0053] (5) With a specific surface area of ​​255m² 2 / g of activated alumina was sprayed at 80℃ in a 12wt% potassium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 7h to obtain activated alumina loaded with 5.6wt% potassium permanganate; with a specific surface area of ​​1330m² 2 / g of activated carbon was sprayed into a polyquaternary ammonium salt aqueous solution with a concentration of 25.1wt%, and after being impregnated evenly, it was placed in a vacuum drying oven and dried at 90-100℃ for 9h to obtain activated carbon loaded with 13.1wt% polyquaternary ammonium salt. Then, activated alumina loaded with potassium permanganate and activated carbon loaded with polyquaternary ammonium salt were mixed at a mass ratio of 5.6:4.4 and mixed evenly to form a mixed substrate for the gas phase filter media layer.

[0054] (6) A mixed substrate with a bulk density of 0.66 g / cc obtained in step (5) is laid on the support layer obtained in step (4) to form a gas phase filter medium layer. The particulate filter layer obtained in step (3) is then laid on the gas phase filter medium layer, and the protective layer obtained in step (2) is then laid on the particulate filter layer to form a four-layer composite. The composite is then entered into a nonwoven hot rolling system and compounded by the pressure and heat of the upper and lower rollers to form an air purification filter material.

[0055] Example 5

[0056] An air purification filter material is prepared by the following steps:

[0057] (1) Mix 62 parts of polypropylene, 7 parts of polyquaternary ammonium salt and 5.5 parts of zinc oxide. After mixing evenly, extrude and granulate the mixture using an extrusion granulation device to obtain modified polypropylene.

[0058] (2) The modified polypropylene and polyamide obtained in step (1) are mixed in a mass ratio of 7:3. After being mixed evenly, they are extruded and melted through a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled, and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is a protective layer for antibacterial non-woven fiber substrate.

[0059] (3) Mix 67 parts of polytetrafluoroethylene, 42 parts of bamboo charcoal fiber, 25 parts of petroleum and 0.8 parts of zinc stearate. After mixing evenly, the mixture is extruded into a columnar die material. The columnar die material is calendered by a calendering device and then heated to remove the petroleum to form a membrane. The membrane is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, the film is heat-set to obtain an antibacterial polytetrafluoroethylene microporous membrane substrate with a pore size of 1.1 μm, which is the particulate filter layer of the antibacterial polytetrafluoroethylene microporous membrane substrate.

[0060] (4) The modified polypropylene and polyester obtained in step (1) are mixed in a mass ratio of 6:4. After being mixed evenly, they are extruded and melted by a melt screw extrusion device to form a melt. The melt is sprayed out through a meltblown die, cooled and formed into a web to form modified polypropylene / polyamide meltblown non-woven fiber, which is the support layer of antibacterial non-woven fiber substrate.

[0061] (5) With a specific surface area of ​​294m² 2 / g of activated alumina was sprayed at 80℃ in a 21wt% potassium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 8 hours to obtain activated alumina loaded with 8wt% potassium permanganate; with a specific surface area of ​​1765m² 2 / g of activated carbon was sprayed into a polyquaternary ammonium salt aqueous solution with a concentration of 24.6wt%, and after being impregnated evenly, it was placed in a vacuum drying oven and dried at 90-100℃ for 8h to obtain activated carbon loaded with 14.9wt% polyquaternary ammonium salt. Then, activated alumina loaded with potassium permanganate and activated carbon loaded with polyquaternary ammonium salt were mixed at a mass ratio of 5.7:4.3 and mixed evenly to form a mixed substrate for the gas phase filter media layer.

[0062] (6) A mixed substrate with a bulk density of 0.69 g / cc obtained in step (5) is laid on the support layer obtained in step (4) to form a gas phase filter medium layer. A particulate filter layer obtained in step (3) is laid on the gas phase filter medium layer, and then a protective layer obtained in step (2) is laid on the particulate filter layer to form a four-layer composite. Then it enters the nonwoven hot rolling system and is composited by the pressure and heat of the upper and lower rollers to form an air purification filter material.

[0063] Comparative Example 1

[0064] The difference between Comparative Example 1 and Example 2 is that: Step (1): 65 parts of polypropylene and 4.5 parts of zinc oxide are mixed and granulated by extrusion granulation equipment to obtain modified polypropylene; the rest are exactly the same.

[0065] Comparative Example 2

[0066] The difference between Comparative Example 2 and Example 2 is that: Step (1): 65 parts of polypropylene and 6 parts of polyquaternary ammonium salt are mixed and granulated by extrusion granulation equipment to obtain modified polypropylene; the rest are exactly the same.

[0067] Comparative Example 3

[0068] Comparative Example 3 differs from Example 2 in that it does not contain step (1); the modified polypropylene in steps (2) and (4) is replaced by polypropylene; and in step (5), the specific surface area is 290 m². 2 / g of activated alumina was sprayed at 60℃ in a 24.9wt% sodium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 8 hours to obtain activated alumina loaded with 14.8wt% sodium permanganate. Then, the sodium permanganate-loaded activated alumina with a specific surface area of ​​1765m² was further processed. 2 / g of activated carbon is mixed at a mass ratio of 5.85:4.15 and mixed evenly to form a mixed substrate for the gas phase filtration medium layer; the rest are exactly the same.

[0069] Comparative Example 4

[0070] The difference between Comparative Example 4 and Example 2 is as follows: Step (3): 67 parts of polytetrafluoroethylene, 25 parts of petroleum and 0.8 parts of zinc stearate are mixed and then extruded into a columnar die material through an extrusion device. The columnar die material is calendered by a calendering device and then heated to remove the petroleum to form a film. The film is stretched in both the transverse and longitudinal directions to form a thin film. After heat setting, a polytetrafluoroethylene microporous membrane substrate is obtained with a pore size of 1.1 μm, which is the particulate filter layer of the polytetrafluoroethylene microporous membrane substrate; the rest is exactly the same.

[0071] Comparative Example 5

[0072] Comparative Example 5 differs from Example 2 in that it does not contain step (1); the modified polypropylene in steps (2) and (4) is replaced by polypropylene; in step (3), 67 parts of polytetrafluoroethylene, 25 parts of petroleum, and 0.8 parts of zinc stearate are mixed and then extruded into a columnar die material. The columnar die material is calendered by a calendering device and then heated to remove the petroleum to form a film. The film is stretched laterally and longitudinally to form a thin film. After heat setting, a polytetrafluoroethylene microporous membrane substrate with a pore size of 1.1 μm is obtained, which is the particulate filter layer of the polytetrafluoroethylene microporous membrane substrate; in step (5), the specific surface area is 290 m². 2 / g of activated alumina was sprayed at 60℃ in a 24.9wt% sodium permanganate aqueous solution, and after uniform impregnation, it was placed in a vacuum drying oven and dried at 75-85℃ for 8 hours to obtain activated alumina loaded with 14.9wt% sodium permanganate. Then, the activated alumina loaded with sodium permanganate, with a specific surface area of ​​1665m², was further... 2 / g of activated carbon is mixed at a mass ratio of 5.85:4.15 and mixed evenly to form a mixed substrate for the gas phase filtration medium layer; the rest are exactly the same.

[0073] Comparative Example 6

[0074] The difference between Comparative Example 6 and Example 2 is that step (5) is omitted; (6) the particulate filter layer obtained in step (3) is laid on the support layer obtained in step (4), and then the protective layer obtained in step (2) is laid on the particulate filter layer to form a four-layer composite, which then enters the nonwoven hot rolling system and is compounded by the pressure and heat of the upper and lower rollers to form an air purification filter material; the rest is exactly the same.

[0075] Example of effect

[0076] 1. The antibacterial properties of the filter materials of Examples 1 to 5 and Comparative Examples 1 to 6 were tested, and the results are shown in Table 1.

[0077] Table 1 Antibacterial properties

[0078]

[0079]

[0080] 2. The filter materials of Examples 1 to 5 and Comparative Examples 1 to 6 were tested for particulate matter filtration using a filter performance tester (model TSI 8130): the aerosol was a mixture of air mixture and sodium chloride particles, and the results are shown in Table 2.

[0081] 3. The removal effects of the filter materials of Examples 1 to 5 and Comparative Examples 1 to 6 on air pollutants formaldehyde and hydrogen sulfide were tested, and the results are shown in Table 2.

[0082] Table 2 Particulate matter filtration efficiency and pollutant removal efficiency

[0083]

[0084] In summary, the air purification filter material of the present invention utilizes a protective layer, a particulate filter layer, a gas phase filter medium layer, and a support layer in synergy. It also incorporates activated alumina particles loaded with permanganate and activated carbon loaded with polyquaternary ammonium salt, resulting in highly efficient purification of both solid and gaseous pollutants in the air. Furthermore, the combination of polyquaternary ammonium salt and zinc oxide loaded in the protective layer, support layer, and gas phase filter medium layer with bamboo charcoal fiber in the particulate filter layer not only improves the uniformity of air purification but also further enhances the antibacterial effect of the filter material.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An air purification filter material, characterized in that, It includes a protective layer and a support layer, with a particulate filter layer disposed between the protective layer and the support layer, and a gas phase filter medium layer disposed between the particulate filter layer and the support layer. The protective layer and the support layer are made of antibacterial non-woven fiber substrate, and the protective layer and the support layer are not made of the same substrate. The particulate filter layer uses an antibacterial polytetrafluoroethylene microporous membrane substrate. The gas phase filtration medium layer uses a mixed substrate of activated alumina and activated carbon, with the activated alumina particles loaded with permanganate and the activated carbon loaded with polyquaternary ammonium salt. The antibacterial non-woven fiber substrate of the protective layer is an antibacterial modified polypropylene / polyamide meltblown non-woven fiber obtained by meltblowing technology. The antibacterial non-woven fiber substrate of the support layer is an antibacterial modified polypropylene / polyester meltblown non-woven fiber obtained by meltblowing technology from modified polypropylene and polyester. The modified polypropylene is composed of the following raw materials and parts by weight: 60-70 parts polypropylene, 4-8 parts polyquaternium salt, and 3-6 parts zinc oxide; The antibacterial polytetrafluoroethylene microporous membrane substrate is composed of the following raw materials and parts by weight: 65-77 parts polytetrafluoroethylene, 35-43 parts bamboo charcoal fiber, 20-28 parts petroleum, and 0.5-1 parts zinc stearate.

2. The air purification filter material according to claim 1, characterized in that, The mass ratio of the modified polypropylene to polyamide is 7:

3.

3. The air purification filter material according to claim 1, characterized in that, The mass ratio of the modified polypropylene to polyester is 6:

4.

4. The air purification filter material according to claim 1, characterized in that, The antibacterial polytetrafluoroethylene microporous membrane substrate has a pore size of 0.5~1.2μm.

5. The air purification filter material according to claim 1, characterized in that, The specific surface area of ​​the activated alumina is 250~300m². 2 / g, wherein the specific surface area of ​​the activated carbon is 1200~2000m². 2 / g.

6. An air purification filter material according to claim 1 or 5, characterized in that, The amount of permanganate supported on the activated alumina is 4-15 wt%; the amount of polyquaternary ammonium salt supported on the activated carbon is 5-14 wt%.

7. The air purification filter material according to claim 6, characterized in that, The mass ratio of activated alumina to activated carbon is 5.6~5.85:4.15~4.4, and the bulk density of the mixed substrate is 0.65~0.7 g / cc.

8. The air purification filter material according to claim 1, characterized in that, The protective layer, particulate filter layer, gas phase filter medium layer, and support layer are hot-rolled composites.

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