High-strength anti-aging melt-blown composite filter material

Abstract

A high-strength anti-aging melt-blown composite filter material relates to the technical field of non-woven fabrics and comprises a coarse filter layer, a sterilization layer, a fine filter layer, a support layer and an inner layer which are sequentially arranged from outside to inside, a plurality of air inlet channels which are arranged in a gradually shrinking manner along the air inlet direction are uniformly distributed on the coarse filter layer, and the outlet ends of the air inlet channels are communicated with the sterilization layer. The air filtering non-woven fabric solves the problems that an air filtering non-woven fabric in the prior art is limited by the influence of a filtering structure, particulate matter is prone to blocking a filtering channel, air circulation is affected, particulate matter in air cannot be effectively captured, and the air filtering efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nonwoven fabrics, in particular to a high-strength, aging-resistant melt-blown composite filter material. Background Art

[0002] Air filters are mainly used to capture dust particles larger than 0.5μm and various suspended solids. Air filters are mainly composed of filter elements and shells. The basic requirements are high filtration efficiency, low flow resistance, and long-term continuous use to reduce the cost of later consumables. Among them, the filtration capacity of non-woven fabrics makes air filters play a vital role in the air purification industry.

[0003] Currently, common non-woven filter fabrics include needle-punched filter elements and melt-blown non-woven fabrics. Among them, the effect of needle-punched filter non-woven fabrics is not ideal and needs to be improved. The existing filter non-woven fabrics have low density, low filtration efficiency, and large gram weight, which do not conform to the cost-saving and environmental protection concepts advocated by the country; melt-blown non-woven fabrics have poor ductility and are easy to break during the composite process, which has a great impact on the filtration efficiency.

[0004] The existing air filter non-woven fabrics have gradually exposed their shortcomings during use, mainly in the following aspects:

[0005] Existing air filtration nonwoven fabrics are limited by the filtering structure, and particulate matter can easily clog the filtering channel, affecting the air circulation, and cannot effectively capture particulate matter in the air, reducing the air filtration efficiency.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the defects in the prior art, the utility model provides a high-strength, aging-resistant melt-blown composite filter material to solve the problem that the air filtration non-woven fabric in the traditional technology is limited by the influence of the filtration structure, particulate matter is easy to clog the filtration channel, affecting the air circulation, and cannot effectively capture the particulate matter in the air, thereby reducing the air filtration efficiency.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The high-strength, aging-resistant melt-blown composite filter material comprises a coarse filter layer, a sterilization layer, a fine filter layer, a support layer and an inner layer arranged in sequence from the outside to the inside. The coarse filter layer is evenly provided with a plurality of air intake channels which are arranged in a tapered manner along the air intake direction. The outlet end of the air intake channel is connected to the sterilization layer.

[0010] A plurality of conical spacer rings are coaxially arranged on the inner wall of the air inlet channel along the air inlet direction, and a particle gathering area is formed between the side wall of the conical spacer ring toward the inlet end of the air inlet channel and the inner wall of the air inlet channel, and an annular groove is provided between the side wall of the conical spacer ring toward the outlet end of the air inlet channel and the inner wall of the air inlet channel, and a plurality of auxiliary air ducts connected to the annular grooves are arranged inside the coarse filter layer, and the outlet end of the auxiliary air duct is connected to the sterilization layer.

[0011] As an improved solution, mesh holes are evenly distributed in the sterilization layer, and the mesh holes are filled with sterilization bags.

[0012] As an improved solution, the fine filtration layer is evenly distributed with conical vents, and the conical vents are also provided with dirt-receiving flocs.

[0013] As an improved solution, nip points are provided in the regions of the outer wall of the coarse filter layer between adjacent air inlet channels.

[0014] As an improved solution, the sterilization layer includes two base layers arranged in parallel, a plurality of wavy filter sheets are fixedly connected in parallel along the air permeability direction between the two base layers, and the protrusions of adjacent wavy filter sheets are fixedly connected.

[0015] As an improved solution, the coarse filter layer includes one of polypropylene hydrophilic spunbond fabric, polyester spunbond mesh non-woven fabric and dry-laid paper-based surface layer.

[0016] As an improved solution, the polypropylene hydrophilic spunbond fabric has a gram weight of 20-30 g / m 2 The polyester spunbond mesh nonwoven fabric has a fiber fineness of 15 to 20 μm, a strength of 4.9 to 5.5 cN / dtex, and a gram weight of 60 to 65 g / m 2 ; The weight of the dry paper base surface layer is 15-25g / m 2 .

[0017] As an improved solution, the sterilization layer is a low-resistance and high-efficiency polypropylene melt-blown non-woven fabric.

[0018] As an improved solution, the low-resistance and high-efficiency polypropylene melt-blown nonwoven fabric has a fiber fineness of 4 to 5 μm and a gram weight of 50 to 60 g / m 2 .

[0019] As an improved solution, the fine filtration layer includes one of coarse-effect PP melt-blown cloth, hot air cloth and needle-punched cotton.

[0020] As an improved solution, the support layer is PP spunbonded nonwoven fabric.

[0021] As an improved solution, the PP spunbonded nonwoven fabric has a gram weight of 15 to 25 g / m2 , the fiber fineness is 45~50μm.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] A plurality of air inlet channels are evenly distributed on the coarse filter layer and are arranged in a tapered manner along the air inlet direction. Ventilation is achieved through the air inlet channels, and a particle gathering area is formed between the side wall of the air inlet channel inlet end and the inner wall of the air inlet channel through a conical spacer ring, thereby improving the efficiency of capturing particles. When the outlet end of the air inlet channel is blocked due to blocked particles, the airflow will enter the sterilization layer through a plurality of auxiliary air channels, thereby reducing the influence of particles on ventilation.

[0024] The sterilization bag in the sterilization layer can sterilize the air and reduce the amount of bacteria;

[0025] The conical vent hole is also provided with a flocculent mass, which can further improve the filtering efficiency of fine particles;

[0026] A new type of melt-blown composite filter material is prepared by combining melt-blown nonwoven materials with spunbond nonwoven materials. By optimizing the composite process parameters, the two materials are closely combined to improve the strength, stiffness and aging resistance of the filter material.

[0027] The wavy filter sheet with a sterilization layer is used to increase the contact area with the air, thereby increasing the filtration of air particles and improving the filtration effect. It can also play a role of elastic support and has breathable and durable characteristics, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] In the figure: 1-coarse filtration layer; 2-sterilization layer; 3-fine filtration layer; 4-support layer; 5-inner layer; 6-air inlet channel; 7-rolling point; 8-conical spacer ring; 9-particle accumulation area; 10-ring groove; 11-auxiliary ventilation channel; 12-sterilization bag; 13-conical ventilation hole; 14-dirt flocs; 15-wavy filter plate. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0032] like Figure 1 As shown, the high-strength aging-resistant melt-blown composite filter material includes a coarse filter layer 1, a sterilization layer 2, a fine filter layer 3, a support layer 4 and an inner layer 5 arranged in sequence from the outside to the inside. The coarse filter layer 1 is evenly distributed with a plurality of air inlet channels 6 which are arranged in a tapered manner along the air inlet direction. The outlet end of the air inlet channel 6 is connected to the sterilization layer 2.

[0033] A plurality of conical spacer rings 8 are coaxially arranged on the inner wall of the air inlet channel 6 along the air inlet direction, and a particle gathering area 9 is formed between the side wall of the conical spacer ring 8 toward the inlet end of the air inlet channel 6 and the inner wall of the air inlet channel 6. An annular groove 10 is provided between the side wall of the conical spacer ring 8 toward the outlet end of the air inlet channel 6 and the inner wall of the air inlet channel 6. A plurality of auxiliary air ducts 11 connected to the annular grooves 10 are arranged inside the coarse filter layer 1, and the outlet end of the auxiliary air duct 11 is connected to the sterilization layer 2.

[0034] The sterilization layer 2 is evenly distributed with mesh holes, and the mesh holes are filled with sterilization bags 12 .

[0035] Conical vent holes 13 are evenly distributed on the fine filter layer 3 , and dirt-receiving flocs 14 are arranged in the conical vent holes 13 .

[0036] The outer wall of the coarse filter layer 1 is provided with nipples 7 in the regions between adjacent air inlet channels 6 .

[0037] The sterilization layer 2 includes two base layers arranged in parallel, and a plurality of corrugated filter sheets 15 are fixedly connected in parallel along the air permeability direction between the two base layers, and the protrusions of adjacent corrugated filter sheets 15 are fixedly connected.

[0038] The coarse filter layer 1 comprises one of polypropylene hydrophilic spunbond fabric, polyester spunbond mesh nonwoven fabric and dry-laid paper-based surface layer.

[0039] The gram weight of polypropylene hydrophilic spunbond fabric is 20-30g / m2; the fiber fineness of polyester spunbond mesh non-woven fabric is 15-20μm, the strength is 4.9-5.5cN / dtex, and the gram weight is 60-65g / m2; the gram weight of the dry-laid paper-based surface layer is 15-25g / m2.

[0040] The sterilization layer 2 is a low-resistance and high-efficiency polypropylene melt-blown non-woven fabric.

[0041] Low-resistance and high-efficiency polypropylene melt-blown non-woven fabric, fiber fineness 4-5μm, gram weight 50-60g / m2.

[0042] The fine filter layer 3 includes one of coarse PP melt-blown cloth, hot air cloth and needle-punched cotton.

[0043] The supporting layer 4 is PP spunbonded nonwoven fabric.

[0044] PP spunbond nonwoven fabric has a gram weight of 15-25g / m2 and a fiber fineness of 45-50μm.

[0045] A plurality of air inlet channels 6 are evenly distributed on the coarse filter layer 1 and are arranged in a tapered manner along the air inlet direction. Ventilation is achieved by using the air inlet channels 6, and a particle gathering area 9 is formed between the side wall of the inlet end of the air inlet channel 6 and the inner wall of the air inlet channel 6 through a conical spacer ring 8, thereby improving the efficiency of capturing particles. When the outlet end of the air inlet channel 6 is blocked due to blocked particles, the airflow will enter the sterilization layer 2 through a plurality of auxiliary air channels 11, thereby reducing the influence of particles on ventilation.

[0046] The sterilization bag 12 in the sterilization layer 2 can sterilize the air and reduce the amount of bacteria;

[0047] The conical vent hole 13 is provided with a dirt-receiving flocculent 14, so that the filtering efficiency of fine particles can be further improved;

[0048] The wave-shaped filter sheet 15 of the sterilization layer 2 is used to increase the contact area with the air, thereby increasing the filtration of air particles and improving the filtration effect. It can also play a role of elastic support, has air permeability and durability, and has a wide range of applications.

[0049] The edges of five layers are hot rolled and sealed.

[0050] The base layer and the corrugated filter are also non-woven fabrics, and the base layer serves to fix the two ends of the corrugated filter.

[0051] The innovation of this solution is the innovation between the multi-layer structures, and the processing method between the non-woven fabric layers can adopt the common processing technology in daily life. Since it is not the innovation of this solution, it will not be elaborated here.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. High-strength, aging-resistant melt-blown composite filter material, characterized by: The invention comprises a coarse filter layer (1), a sterilization layer (2), a fine filter layer (3), a support layer (4) and an inner layer (5) which are arranged in sequence from the outside to the inside. The coarse filter layer (1) is evenly distributed with a plurality of air intake channels (6) which are arranged in a tapered manner along the air intake direction. The outlet end of the air intake channel (6) is connected to the sterilization layer (2). A plurality of conical spacer rings (8) are coaxially arranged on the inner wall of the air inlet channel (6) along the air inlet direction, and a particle accumulation area (9) is formed between the side wall of the conical spacer ring (8) facing the inlet end of the air inlet channel (6) and the inner wall of the air inlet channel (6). An annular groove (10) is provided between the side wall of the conical spacer ring (8) facing the outlet end of the air inlet channel (6) and the inner wall of the air inlet channel (6). A plurality of auxiliary air ducts (11) connected to the annular grooves (10) are arranged inside the coarse filter layer (1), and the outlet end of the auxiliary air duct (11) is connected to the sterilization layer (2).

2. The high-strength, aging-resistant melt-blown composite filter material according to claim 1, characterized in that: The sterilization layer (2) is evenly distributed with mesh holes, and the mesh holes are filled with sterilization bags (12).

3. The high-strength, aging-resistant melt-blown composite filter material according to claim 2 is characterized in that: The fine filtration layer (3) is evenly distributed with conical vent holes (13), and the conical vent holes (13) are also provided with dirt-receiving flocs (14).

4. The high-strength, aging-resistant melt-blown composite filter material according to claim 3 is characterized in that: The outer wall of the coarse filter layer (1) is provided with a nip point (7) in a region between adjacent air inlet channels (6).

5. The high-strength, aging-resistant melt-blown composite filter material according to claim 4 is characterized in that: The sterilization layer (2) comprises two base layers arranged in parallel, a plurality of wavy filter sheets (15) are fixedly connected in parallel along the air permeability direction between the two base layers, and the protrusions of adjacent wavy filter sheets (15) are fixedly connected.

6. The high-strength, aging-resistant melt-blown composite filter material according to claim 5, characterized in that: The coarse filter layer (1) comprises one of a polypropylene hydrophilic spunbond fabric, a polyester spunbond mesh non-woven fabric and a dry-laid paper-based surface layer.

7. The high-strength, aging-resistant melt-blown composite filter material according to claim 6, characterized in that: The polypropylene hydrophilic spunbond fabric has a gram weight of 20-30 g / m2; the polyester spunbond mesh nonwoven fabric has a fiber fineness of 15-20 μm, a strength of 4.9-5.5 cN / dtex, and a gram weight of 60-65 g / m2; and the dry-laid paper-based surface layer has a gram weight of 15-25 g / m2.

8. The high-strength, aging-resistant melt-blown composite filter material according to claim 7, characterized in that: The sterilization layer (2) is a low-resistance and high-efficiency polypropylene melt-blown non-woven fabric, wherein the fiber fineness of the low-resistance and high-efficiency polypropylene melt-blown non-woven fabric is 4 to 5 μm and the gram weight is 50 to 60 g / m2.

9. The high-strength, aging-resistant melt-blown composite filter material according to claim 8, characterized in that: The fine filter layer (3) comprises one of coarse-effect PP melt-blown cloth, hot air cloth and needle-punched cotton.

10. The high-strength, aging-resistant melt-blown composite filter material according to claim 9, characterized in that: The support layer (4) is a PP spunbonded nonwoven fabric, the PP spunbonded nonwoven fabric has a gram weight of 15 to 25 g / m2 and a fiber fineness of 45 to 50 μm.

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