Portable microfiltration level pressureless water permeable PE filter cup

Abstract

The utility model discloses a portable microfiltration grade pressureless water permeable PE filter cup, including integrative cup body, the lateral wall of cup body is integrative and is equipped with a plurality of filter petals along the circumferential direction, and a plurality of filter petals array distribution, and form self -supporting type filter channel between adjacent filter petals. The utility model discloses through design array distribution's filter petal, form self -supporting type filter channel between adjacent filter petals, can solve the problem that traditional filter core needs to support framework, and the surface of filter petal introduces hydrophilic functional group, can ensure that the inside and outside surface are even hydrophilization, improve capillary action, overcome the inherent hydrophobicity of PE material, through the compounding of ultrahigh molecular weight polyethylene powder and bacteriostatic agent, solve the balance problem of flux, precision, antibacterial in pressureless filtration, eliminate thermal stress crack through gradient cooling process, avoid petal body deformation, and the yield of product is improved, realize that the filtration flux is greater than or equal to 200mL / min, and the removal rate of 0.5um or more particulate matter is greater than 99.9%.

Description

Technical Field

[0001] This utility model belongs to the field of filtration technology, specifically relating to a portable microfiltration-grade pressureless permeable PE filter cup. Background Technology

[0002] Microplastic (microplastic) pollution in bottled water (particle size ranging from 1μm to 5mm) is becoming increasingly prominent. Its formation stems from multiple factors, including aging and damage to plastic bottle caps and water pipes, intrusion of environmental pollutants, and introduction during packaging and filling processes. Microplastics may carry harmful components such as plasticizers and flame retardants, and long-term ingestion can disrupt the human endocrine system. Furthermore, microplastics can adsorb heavy metals and persistent organic pollutants from the environment, significantly increasing the risk of health exposure.

[0003] Existing water treatment technologies are insufficient to effectively address microplastic contamination in bottled water: activated carbon adsorption has low efficiency in removing microplastics and cannot control the final water quality accuracy within 0.5-1μm, making it difficult to play a interception role; ultrafiltration membranes have some effect, but when the water production is large, the interception accuracy is unstable with fluctuations in the filtered water quality (it is difficult to consistently reach 0.5-1μm), and there are also defects such as high residual water in the dead space; ceramic filter cartridges are difficult to consistently achieve filtration accuracy of 0.5-1μm, and also have the problem of high residual water in the dead space. Utility Model Content

[0004] To address the problems in the existing technology, the purpose of this utility model is to provide a portable microfiltration-grade pressureless permeable PE filter cup.

[0005] To achieve the above objectives and technical effects, the technical solution adopted by this utility model is as follows: A portable microfiltration-grade pressureless permeable PE filter cup includes an integrally formed cup body. The side wall of the cup body is integrally formed with multiple filter petals along the circumferential direction, and the multiple filter petals are distributed in an array, forming a self-supporting filtration channel between adjacent filter petals.

[0006] Furthermore, the portable microfiltration-grade pressureless permeable PE filter cup has a filtration accuracy of 0.5-1μm.

[0007] Furthermore, the cup body is a hollow cylindrical structure with an opening at the top as the water inlet and a bottom plate at the bottom. The bottom plate has several filter holes that work together with the filter petals to form a microfiltration structure.

[0008] Furthermore, the pore size of the filter pore is 0.5-1μm.

[0009] Furthermore, the wall thickness of the filter flap is 0.8-1.5 mm.

[0010] Furthermore, the specific surface area of ​​the portable microfiltration-grade pressureless permeable PE filter cup is 550.54 cm². 2 .

[0011] Furthermore, the cup body is made of ultra-high molecular weight polyethylene powder or ultra-high molecular weight polyethylene powder and antibacterial agent.

[0012] Furthermore, the ultra-high molecular weight polyethylene powder has a mesh size of 250-500 mesh.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) This utility model solves the problem of traditional filter elements needing a support frame by designing an array of filter petals, forming a self-supporting filter channel between adjacent filter petals, thus reducing weight by more than 20%. The introduction of hydrophilic functional groups on the inner and outer surfaces of the filter petals ensures uniform hydrophilicity, enhances capillary action, and overcomes the inherent hydrophobicity of PE materials. At the same time, by compounding ultra-high molecular weight polyethylene powder and antibacterial agents, the problem of balancing throughput, precision, and antibacterial properties in pressureless filtration is solved. 2) This utility model eliminates thermal stress cracks through a gradient cooling process, avoids petal deformation, and increases product yield from 70% to 98%; 3) This utility model can achieve a filtration throughput of ≥200mL / min, a removal rate of >99.9% for particles larger than 0.5μm, and a removal rate of >99.99% for Escherichia coli. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram illustrating the filtration principle of this utility model; Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0015] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0016] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0017] like Figure 1-3As shown, a portable microfiltration-grade pressureless permeable PE filter cup has a filtration accuracy of 0.5-1μm. It includes an integrally formed cup body 1, wherein the side wall of the cup body 1 is integrally formed with multiple filter petals 2 along the circumferential direction, with a wall thickness of 0.8-1.5mm, and the multiple filter petals 2 are arrayed and distributed, forming a self-supporting filtration channel between adjacent filter petals 2, which can solve the problem of traditional filter cartridges needing a supporting skeleton. The surface of the filter petal 2 (including the inner and outer surfaces) is introduced with hydrophilic functional groups such as carboxyl or hydroxyl functional groups to ensure uniform hydrophilicity of the inner and outer surfaces, improve capillary action, and overcome the inherent hydrophobicity of PE material.

[0018] In some embodiments, the portable microfiltration-grade pressureless permeable PE filter cup disclosed in this invention has a specific surface area of ​​550.54 cm². 2 .

[0019] In some embodiments, the cup body 1 is a hollow cylindrical structure with an opening at the top serving as the water inlet. A base plate 3 is provided at the bottom, and the base plate 3 has several filter holes with a pore size of 0.5-1 μm and a pore density of 8000-15000 pores / cm³. 2 It works in conjunction with filter flap 2 to form a microfiltration structure.

[0020] In some embodiments, the cup body 1 is made of ultra-high molecular weight polyethylene powder or ultra-high molecular weight polyethylene powder and antibacterial agent.

[0021] In some more specific embodiments, the ultra-high molecular weight polyethylene powder has a mesh size of 250-500 mesh.

[0022] In some embodiments, the array arrangement density of filter petals 2 is 15-25 petals / circumference, and the channel width between petals is 0.3-0.8mm.

[0023] This utility model also discloses a method for preparing a portable microfiltration-grade pressureless permeable PE filter cup, comprising the following steps: 1) Mix 250-500 mesh ultra-high molecular weight polyethylene powder or ultra-high molecular weight polyethylene powder and antibacterial agent evenly and set aside; in this step, the mass ratio of ultra-high molecular weight polyethylene powder and antibacterial agent (a mixture of nano silver and titanium dioxide, with a mass ratio of 1-3:1-4) is 99.5:0.5-99:1. 2) Add the mixture obtained in step 1) into the mold and fire it at 150-180℃ and 0.5-1.5t for 20-40 minutes; 3) Gradient cooling: First, cool the temperature to 100℃ at a rate of 2-5℃ / min, then allow it to cool naturally to below 40℃ before demolding. Gradient cooling helps reduce internal stress and prevents the valve from deforming. 4) In a mixed atmosphere of argon and oxygen (volume ratio 2-4:1), the product obtained in step 3) is subjected to double-sided irradiation plasma hydrophilic treatment using 200-300W radio frequency plasma for 90-150s and a vacuum degree of 10-30Pa, so that hydrophilic functional groups, such as carboxyl or hydroxyl functional groups, are introduced onto the surface of filter lobe 2 (including the inner and outer surfaces).

[0024] This utility model also discloses the application of a portable microfiltration-grade pressureless permeable PE filter cup in bottled water filtration. The cup body 1 is inserted into the mouth of the bottled water, and the filtration flux is ≥200mL / min by utilizing the weight of the water. The removal rate of particles larger than 0.5μm is >99.9%, and the removal rate of E. coli is >99.99%. This solves the problem of slow flow rate of traditional filter cups and is more environmentally friendly and economical.

[0025] In this invention, the cup body 1 can be reused more than 50 times, and after each use, more than 90% of the initial flow rate can be restored by backwashing.

[0026] Example 1 like Figure 1-3 As shown, a portable microfiltration-grade pressureless permeable PE filter cup has a filtration accuracy of 0.5μm. It includes an integrally formed cup body 1, wherein the side wall of the cup body 1 is integrally formed with multiple filter petals 2 along the circumferential direction, the wall thickness is 0.8mm, and the multiple filter petals 2 are arrayed and distributed, forming a self-supporting filtration channel between adjacent filter petals 2, which can solve the problem of traditional filter cartridges needing a supporting skeleton. The surface of the filter petal 2 (including the inner and outer surfaces) is introduced with hydrophilic functional groups such as carboxyl or hydroxyl functional groups to ensure uniform hydrophilicity of the inner and outer surfaces, improve capillary action, and overcome the inherent hydrophobicity of PE material.

[0027] The portable microfiltration-grade pressureless permeable PE filter cup disclosed in this embodiment has a specific surface area of ​​550.54 cm². 2 .

[0028] The cup body 1 is a hollow cylindrical structure with an opening at the top serving as the water inlet. A base plate 3 is located at the bottom, and the base plate 3 has several filter holes with a pore size of 0.5 μm and a pore density of 8000 pores / cm³. 2 It works in conjunction with filter flap 2 to form a microfiltration structure.

[0029] The cup body 1 is made of ultra-high molecular weight polyethylene powder and antibacterial agent.

[0030] The ultra-high molecular weight polyethylene powder has a mesh size of 250.

[0031] The array density of filter petals 2 is 25 petals per circumference, and the channel width between the petals is 0.3 mm.

[0032] A method for preparing a portable microfiltration-grade pressureless permeable PE filter cup includes the following steps: 1) Mix 250-mesh ultra-high molecular weight polyethylene powder and antibacterial agent evenly and set aside; in this step, the mass ratio of ultra-high molecular weight polyethylene powder and antibacterial agent (a mixture of nano silver and titanium dioxide, with a mass ratio of 1-3) is 99.5:0.5. 2) Add the mixture obtained in step 1) into the mold and fire it at 160℃ and 1t pressure for 20 minutes; 3) Gradient cooling: First, cool the temperature down to 100℃ at a rate of 5℃ / min, then allow it to cool naturally to below 40℃ before demolding. Gradient cooling helps reduce internal stress and prevents the valve from deforming. 4) In a mixed atmosphere of argon and oxygen (volume ratio 2:1), the product obtained in step 3) is subjected to double-sided irradiation plasma hydrophilic treatment using 200W radio frequency plasma for 90s and a vacuum degree of 10Pa, so that hydrophilic functional groups, such as carboxyl or hydroxyl functional groups, are introduced into the surface of filter petal 2 (including the inner and outer surfaces).

[0033] The application of a portable microfiltration-grade pressureless permeable PE filter cup in bottled water filtration involves inserting the cup body 1 into the mouth of the bottled water and utilizing the weight of the water to achieve a filtration flux of ≥200mL / min. It achieves a removal rate of >99.9% for particles larger than 0.5μm and a removal rate of >99.99% for E. coli, solving the problem of slow flow rate in traditional filter cups and making it more environmentally friendly and economical.

[0034] In this embodiment, the cup body 1 can be reused more than 50 times, and after each use, more than 90% of the initial throughput can be restored by backwashing.

[0035] The parts or structures not specifically described in this utility model can be made using existing technology or existing products, and will not be elaborated here.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A portable microfiltration grade pressureless water permeable PE filter cup, characterized in that, The cup includes an integrally formed cup body, the sidewall of which is integrally formed with multiple filter petals along the circumferential direction, and the multiple filter petals are distributed in an array, with a self-supporting filter channel formed between adjacent filter petals.

2. A portable microfiltration grade pressureless water permeable PE filter cup according to claim 1, characterized in that, The portable microfiltration-grade pressureless permeable PE filter cup has a filtration accuracy of 0.5-1μm.

3. The portable microfiltration-grade pressureless permeable PE filter cup according to claim 1, characterized in that, The cup body is a hollow cylindrical structure with an opening at the top for water inlet and a bottom plate at the bottom. The bottom plate has several filter holes that work together with the filter discs to form a microfiltration structure.

4. A portable microfiltration-grade pressureless permeable PE filter cup according to claim 3, characterized in that, The pore size of the filter pore is 0.5-1μm.

5. A portable microfiltration-grade pressureless permeable PE filter cup according to claim 1, characterized in that, The wall thickness of the filter flap is 0.8-1.5 mm.

6. A portable microfiltration-grade pressureless permeable PE filter cup according to claim 1, characterized in that, The specific surface area of the portable microfiltration level pressureless water permeable PE filter cup is 550.54 cm 2 .

Images