A process for processing a membrane composite filtration material

Abstract

The application discloses a processing technology of a membrane composite filter material and relates to the field of filter materials, which comprises a polyurethane-based membrane, a polypropylene membrane fixed at the bottom end of the polyurethane-based membrane, a polyethylene membrane fixed at the top end of the polyurethane-based membrane and the bottom end of the polypropylene membrane, a plurality of through holes penetrating through the polyethylene membrane formed in the polyethylene membrane, antibacterial fabric fixed on the side of the polyethylene membrane away from the polyurethane-based membrane and the polypropylene membrane, and tensile fiber cloth fixed on the side of the antibacterial fabric away from the polyethylene membrane. The antibacterial fabric can inhibit bacteria, so that the impurities and bacteria filtered by the polyurethane-based membrane and the polypropylene membrane cannot continue to breed and corrode the filter material.

Description

Technical Field

[0001] This invention relates to the field of membrane composite filtration materials, specifically a processing technology for membrane composite filtration materials. Background Technology

[0002] Composite filtration membranes are used in many industries such as water treatment, pharmaceuticals, food processing, medical care, and scientific research. They are mainly used to separate and purify different components in mixtures. The separation effect is achieved by retention, which means that an effective and selective barrier is provided for particles and solutes under different operating conditions.

[0003] Composite filter membranes are typically composed of two or more layers of different materials, each layer having a specific function and playing a different role in the filtration process. For example, in the prior art, there is a membrane composite filter material and its processing technology disclosed in CN103566658B. This layered structure allows for the simultaneous filtration of various particle sizes and solute types, and can orient specific particles according to different pore sizes.

[0004] Composite filter membranes are used in actual production and daily life to filter bacteria in addition to ordinary impurities. However, bacteria and the filtered impurities adhere to the filter material, which can cause bacterial growth and corrosion of the filter material, thus affecting the service life of the filter material. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a processing technology for membrane composite filter materials. By adding an antibacterial fabric to the composite filter material, the antibacterial fabric can inhibit bacteria and prevent impurities and bacteria filtered by polyurethane-based membranes and polypropylene membranes from continuing to grow and corrode the filter material, thus effectively solving the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a processing technology for membrane composite filter materials, the specific steps of which are as follows:

[0007] S1: Lay the polypropylene film flat and apply glue to the top of the polypropylene film. Then lay the polyurethane base film flat and cover the top of the polypropylene film. Use a hot press device to squeeze the polyurethane base film and the polypropylene film to solidify the glue and bond the polyurethane base film and the polypropylene film together.

[0008] S2: Multiple through holes with a diameter of 5mm are made on the surface of the polyethylene film. Then the polyethylene film is adhered to the top of the polyurethane base film and the bottom of the polypropylene film. The polyethylene film can protect the polyurethane base film and the polypropylene film.

[0009] S3: Adhere the antibacterial fabric to the side of the polyethylene film away from the polyurethane base film and the polypropylene film;

[0010] S4: Select tensile fiber cloth made of polypropylene fiber and adhere the tensile fiber cloth to the side of the antibacterial fabric away from the polyethylene membrane to obtain the composite filter material.

[0011] The present invention also includes a membrane composite filter material processed using the same processing technology, comprising a polyurethane base membrane, wherein a polypropylene membrane is fixedly disposed at the bottom end of the polyurethane base membrane, and a polyethylene membrane is fixedly disposed at the top end of the polyurethane base membrane and the bottom end of the polypropylene membrane, wherein a plurality of through holes penetrating the polyethylene membrane are provided on the polyethylene membrane.

[0012] An antibacterial fabric is fixedly attached to the side of the polyethylene film away from the polyurethane base film and the polypropylene film. A tensile fiber cloth is fixedly attached to the side of the antibacterial fabric away from the polyethylene film. Liquid can pass through the antibacterial fabric and the tensile fiber cloth.

[0013] Furthermore, the bonding methods in steps S2, S3 and S4 are the same as those in S1, all requiring the use of glue and a hot pressing device. Each time materials are bonded, the glue application and hot pressing operations need to be repeated.

[0014] Furthermore, the hot pressing device in step S1 includes a base, and two upright plates are provided on the top of the base via a slide rail. Two vertically symmetrical second hot pressing components are provided on the side of one upright plate facing the other upright plate via a linear motor, which can adjust the position of the two upright plates according to the width of the material to be bonded. During the bonding process, the material to be bonded is moved by the drive device.

[0015] Furthermore, the second hot-pressing assembly includes a protective cover fixedly mounted on the linear motor actuator, and the inner wall of the protective cover is provided with multiple rollers via a rotating shaft;

[0016] Two linear motors are installed on the same vertical plate. Each linear motor has two moving parts, one at the top and one at the bottom. The two moving parts at the top are fixed on the top protective cover, and the two moving parts at the bottom are installed on the bottom protective cover.

[0017] The rollers are connected to each other by edge sealing belts. The edge portion of the hot-pressed material is clamped between two edge sealing belts on the same vertical plate. The hot-pressed material moves and drives the edge sealing belts to move.

[0018] Furthermore, the outer end of the sealing belt is inlaid with multiple second metal pieces, and a heating plate is fixedly installed at the top inside the protective cover.

[0019] Furthermore, the base has two symmetrical upper and lower borders on its top, and a first hot-pressing assembly is provided inside the borders. The borders are located on the rear side of the upright plate.

[0020] The first hot pressing assembly includes a hollow roller mounted on the inner wall of the frame via a rotating shaft. The hollow rollers inside the same frame are connected to each other by extrusion belts. During hot pressing, the material to be hot pressed is sandwiched between the two extrusion belts.

[0021] Furthermore, both ends of the hollow roller are provided with end caps, which are respectively bolted to the outside of the two side frames. Heating rods are fixed on both side frames and extend into the interior of the hollow roller. The heating rods can generate heat and heat the hollow roller, and the hollow roller itself can also conduct heat.

[0022] The outer end of the extrusion strip is inlaid with a plurality of first metal sheets, and a plurality of heat-conducting pillars are fixed on the first metal sheets, with one end of each heat-conducting pillar extending to the inner side of the extrusion strip.

[0023] Furthermore, the bottom frame is fixed to the top of the base, and two iron rods are fixed to both sides of the top frame. A sleeve is fitted at the bottom of the iron rod, and the sleeve is fixed to the top of the base. An electromagnet is fixed at the bottom of the sleeve, and the magnetic force of the electromagnet is used to pull the top frame downward.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By adding an antibacterial fabric to the composite filter material, the antibacterial fabric can inhibit bacteria and prevent impurities and bacteria filtered by the polyurethane-based membrane and polypropylene membrane from continuing to grow and corrode the filter material.

[0026] During hot pressing, the edges of the material are pressed first, so that the glue at the edges solidifies first. In subsequent hot pressing processes, the glue between the two layers of material will not overflow from the edges of the material due to pressure, reducing glue waste and avoiding excessive glue overflow that is difficult to clean.

[0027] By sandwiching the material to be hot-pressed between two first hot-pressing components, the extrusion strip and the first metal sheet are in full contact with the material during the hot-pressing process, and the first metal sheet can efficiently transfer heat to the material, thereby heating the material. The material has a larger stress area and is more fully compressed during the hot-pressing process, while not affecting the heating of the material. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the membrane composite filtration material of the present invention;

[0029] Figure 2 This is a structural diagram of the hot pressing device of the present invention;

[0030] Figure 3 This is a diagram of the internal structure of the hollow roller of the present invention;

[0031] Figure 4 This is a side sectional view of the first hot-pressing assembly of the present invention;

[0032] Figure 5 This is a cross-sectional view of the extrusion strip of the present invention;

[0033] Figure 6 This is a diagram of the internal structure of the sleeve of the present invention;

[0034] Figure 7 This is a structural diagram of the second hot-pressing assembly of the present invention;

[0035] Figure 8 This is a side sectional view of the second hot-pressing assembly of the present invention.

[0036] In the diagram: 1. Polyurethane base film; 2. Polypropylene film; 3. Polyethylene film; 4. Through hole; 5. Antibacterial fabric; 6. Tensile fiber cloth; 7. Base; 8. First hot pressing assembly; 801. Hollow roller; 802. Heating rod; 803. Extrusion belt; 804. First metal sheet; 805. Heat-conducting column; 9. Frame; 10. Iron insert rod; 11. Sleeve; 12. Second hot pressing assembly; 1201. Protective cover; 1202. Roller; 1203. Edge sealing belt; 1204. Second metal sheet; 1205. Heating plate; 13. End cap; 14. Electromagnet; 15. Vertical plate; 16. Linear motor. Detailed Implementation

[0037] To make the technical means, creative features, and achieved objectives and effects of this invention readily understandable, the invention will be further described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] To address the shortcomings of existing technologies, such as Figure 1-8 As shown, the present invention provides a processing technology for membrane composite filter materials, the specific steps of which are as follows:

[0039] S1: Lay out the polypropylene film 2 and apply glue to the top of the polypropylene film 2. Then lay out the polyurethane base film 1 and cover the top of the polypropylene film 2. Use a hot press device to squeeze the polyurethane base film 1 and the polypropylene film 2 to solidify the glue and bond the polyurethane base film 1 and the polypropylene film 2 together.

[0040] S2: Multiple through holes 4 with a diameter of 5mm are made on the surface of polyethylene film 3. Then, polyethylene film 3 is bonded to the top of polyurethane base film 1 and the bottom of polypropylene film 2. Polyethylene film 3 can protect polyurethane base film 1 and polypropylene film 2.

[0041] S3: Adhere the antibacterial fabric 5 to the side of the polyethylene film 3 away from the polyurethane base film 1 and the polypropylene film 2.

[0042] S4: Select tensile fiber cloth 6 made of polypropylene fiber and adhere tensile fiber cloth 6 to the side of antibacterial fabric 5 away from polyethylene membrane 3 to obtain composite filter material.

[0043] The membrane composite filter material processed by the above-mentioned processing technology includes a polyurethane base membrane 1, a polypropylene membrane 2 fixedly disposed at the bottom end of the polyurethane base membrane 1, a polyethylene membrane 3 fixedly disposed at the top end of the polyurethane base membrane 1 and the bottom end of the polypropylene membrane 2, and a plurality of through holes 4 penetrating the polyethylene membrane 3 are provided on the polyethylene membrane 3.

[0044] Antibacterial fabric 5 is fixedly provided on the side of the polyethylene film 3 away from the polyurethane base film 1 and the polypropylene film 2. Tensile fiber cloth 6 is fixedly provided on the side of the antibacterial fabric 5 away from the polyethylene film 3. Liquid can pass through the antibacterial fabric 5 and the tensile fiber cloth 6.

[0045] By bonding the polyurethane base membrane 1 and the polypropylene membrane 2, the two constitute the main body of the filter material, which can achieve the filtration function by relying on their microporous structure. The polyethylene membrane 3 is isolated on the surface of the two and has through holes 4. Without obstructing the filtration of liquid, the polyethylene membrane 3 can protect the polyurethane base membrane 1 and the polypropylene membrane 2 and increase the overall strength of the filter material. The tensile fiber cloth 6 also increases the strength of the filter material and prevents damage. The antibacterial fabric 5 can inhibit bacteria and prevent impurities and bacteria filtered by the polyurethane base membrane 1 and the polypropylene membrane 2 from continuing to grow and corrode the filter material.

[0046] The bonding methods in steps S2, S3 and S4 are the same as those in S1. They all require the use of glue and a hot pressing device. Each time materials are bonded, the glue application and hot pressing operations need to be repeated.

[0047] By bonding the individual layers of material together in sequence through the above steps, a complete filter material can be created.

[0048] When hot-pressing the materials to be bonded, first hot-press the two edges of the materials, such as... Figure 2 , 7 As shown in Figure 8, the hot pressing device in step S1 includes a base 7. The top of the base 7 is provided with two upright plates 15 via a slide rail. One of the upright plates 15 is provided with two vertically symmetrical second hot pressing components 12 via a linear motor 16 on the side facing the other upright plate 15. The position of the two upright plates 15 can be adjusted according to the width of the material to be bonded. During the bonding process, the material to be bonded is moved by the drive device.

[0049] Slide the vertical plate 15 according to the width of the material being hot-pressed, and adjust the distance between the two vertical plates 15 so that the edge of the material being hot-pressed can be sandwiched between the two second hot-pressing components 12 on the corresponding side.

[0050] The material needs to be heated during the hot pressing process, such as... Figure 2 , 7 As shown in Figures 8 and 9, the second hot pressing assembly 12 includes a protective cover 1201 fixedly mounted on the mover of the linear motor 16, and a plurality of rollers 1202 are provided on the inner wall of the protective cover 1201 via a rotating shaft;

[0051] Two linear motors 16 are provided on the same vertical plate 15. Each linear motor 16 is provided with two moving parts, one at the top and one at the bottom. The two moving parts at the top are fixed on the top protective cover 1201, and the two moving parts at the bottom are provided on the bottom protective cover 1201.

[0052] The rollers 1202 are connected to each other by edge sealing belts 1203. The edge portion of the hot-pressed material is sandwiched between two edge sealing belts 1203 on the same vertical plate 15. The hot-pressed material moves and drives the edge sealing belts 1203 to move.

[0053] The outer end of the sealing belt 1203 is inlaid with a plurality of second metal pieces 1204, and the top of the inner part of the protective cover 1201 is fixedly provided with a heating plate 1205.

[0054] The linear motor 16 drives the two upper and lower second hot pressing components 12 to move. The edge of the material to be hot pressed is clamped between the sealing belts 1203 of the two second hot pressing components 12. During the hot pressing process, the material moves and drives the sealing belts 1203 to move. The sealing belts 1203 clamp the material, and the second metal sheet 1204 on the sealing belts 1203 also comes into contact with the material. As the sealing belts 1203 move, they drive the second metal sheet 1204 to move. When it moves into the protective cover 1201, the heating plate 1205 heats the second metal sheet 1204, raising its temperature. The heated second metal sheet 1204 heats the material when it comes into contact with it. In this way, the edge of the material is hot pressed first, so that the glue at the edge solidifies first. In the subsequent hot pressing process, the glue between the two layers of material will not overflow from the edge of the material due to compression, reducing glue waste and avoiding excessive glue overflow that is difficult to clean.

[0055] After hot pressing at the edges, hot pressing is performed on the middle part of the material, such as... Figure 2-5 As shown, the base 7 has two symmetrical upper and lower borders 9 on its top, and the first hot pressing assembly 8 is provided inside the border 9. The border 9 is located on the rear side of the upright plate 15.

[0056] The first hot pressing assembly 8 includes a hollow roller 801 mounted on the inner wall of the frame 9 via a rotating shaft. The hollow rollers 801 inside the same frame 9 are connected to each other by extrusion belts 803. During hot pressing, the two extrusion belts 803 are sandwiched between the hot-pressed material.

[0057] Both ends of the hollow roller 801 are provided with end caps 13. The two end caps 13 are respectively bolted to the outside of the two side frames 9. Heating rods 802 are fixed on the two side frames 9. The heating rods 802 extend into the interior of the hollow roller 801. The heating rods 802 can generate heat and heat the hollow roller 801. The hollow roller 801 itself can also conduct heat.

[0058] The outer end of the extrusion strip 803 is inlaid with a plurality of first metal sheets 804, and a plurality of heat-conducting pillars 805 are fixed on the first metal sheets 804, with one end of the heat-conducting pillars 805 extending to the inner side of the extrusion strip 803.

[0059] The material being hot-pressed is sandwiched between the upper and lower first hot-pressing components 8. The movement of the material during hot pressing drives the extrusion belt 803 to move, causing the hollow roller 801 to roll. The heating rod 802 can heat the hollow roller 801, which in turn heats the heat-conducting column 805 and conducts the heat to the first metal sheet 804. The first metal sheet 804 is in full contact with the material during hot pressing, thereby heating the material. In this way, the material has a larger stress area and is more fully compressed during hot pressing, without affecting the heating of the material.

[0060] During hot pressing, the material needs to be compressed, such as Figure 2 , 6 As shown, the bottom frame 9 is fixedly installed on the top of the base 7, and two iron rods 10 are fixedly installed on both sides of the top frame 9. A sleeve 11 is sleeved on the bottom end of the iron rod 10. The sleeve 11 is fixedly installed on the top of the base 7. An electromagnet 14 is fixedly installed inside the bottom end of the sleeve 11. The magnetic force of the electromagnet 14 is used to pull the top frame 9 downward.

[0061] The iron insert 10 is attracted downward by the magnetic force of the electromagnet 14, which in turn pulls the first hot-pressing component 8 and the frame 9 downward, thereby applying pressure to the material. The amount of pressure received by the material is proportional to the magnitude of the magnetic force of the electromagnet 14.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A processing technology for a membrane composite filter material, characterized in that: The specific steps are as follows: S1: Lay out the polypropylene film (2) and apply glue to the top of the polypropylene film (2). Then lay out the polyurethane base film (1) and cover the top of the polypropylene film (2). Use a hot press device to squeeze the polyurethane base film (1) and the polypropylene film (2) so that the glue solidifies and adheres the polyurethane base film (1) and the polypropylene film (2). S2: Multiple through holes (4) with a diameter of 5 mm are made on the surface of the polyethylene film (3), and then the polyethylene film (3) is bonded to the top of the polyurethane base film (1) and the bottom of the polypropylene film (2). S3: Adhere the antibacterial fabric (5) to the side of the polyethylene film (3) away from the polyurethane base film (1) and the polypropylene film (2); S4: Select tensile fiber cloth (6) made of polypropylene fiber and attach tensile fiber cloth (6) to the side of antibacterial fabric (5) away from polyethylene membrane (3) to obtain composite filter material; The hot pressing device in step S1 includes a base (7), and the top of the base (7) is provided with two upright plates (15) via a slide rail. One of the upright plates (15) is provided with two vertically symmetrical second hot pressing components (12) via a linear motor (16) on the side facing the other upright plate (15). The second hot pressing assembly (12) includes a protective cover (1201) fixed on the mover of the linear motor (16), and a plurality of rollers (1202) are provided on the inner wall of the protective cover (1201) via a rotating shaft. The rollers (1202) are connected to each other by edge sealing belts (1203), and the edge portion of the hot-pressed material is sandwiched between two edge sealing belts (1203) on the same vertical plate (15); The outer end of the sealing belt (1203) is inlaid with a plurality of second metal pieces (1204), and the top of the inner part of the protective cover (1201) is fixedly provided with a heating plate (1205). The base (7) has two symmetrical upper and lower frame frames (9) on its top. The frame frames (9) are provided with a first hot pressing assembly (8) inside. The frame frames (9) are located on the rear side of the upright plate (15). The first hot pressing assembly (8) includes a hollow roller (801) mounted on the inner wall of the frame (9) via a rotating shaft. The hollow rollers (801) inside the same frame (9) are connected to each other by extrusion belts (803). During hot pressing, the two extrusion belts (803) will clamp the material to be hot pressed between them. The hollow roller (801) is provided with end caps (13) at both ends. The two end caps (13) are respectively bolted to the outside of the two side frames (9). Heating rods (802) are fixed on the two side frames (9). The heating rods (802) extend into the interior of the hollow roller (801). The outer end of the extrusion strip (803) is inlaid with a plurality of first metal sheets (804), and a plurality of heat-conducting pillars (805) are fixed on the first metal sheets (804), with one end of the heat-conducting pillars (805) extending to the inner side of the extrusion strip (803).

2. The processing technology of the membrane composite filter material according to claim 1, characterized in that: The bonding methods in steps S2, S3 and S4 are the same as those in S1, and all require the use of glue and a hot pressing device.

3. The processing technology of the membrane composite filter material according to claim 1, characterized in that: The bottom frame (9) is fixedly installed at the top of the base (7). Two iron rods (10) are fixedly installed on both sides of the top frame (9). A sleeve (11) is fitted at the bottom of the iron rod (10). The sleeve (11) is fixedly installed at the top of the base (7). An electromagnet (14) is fixedly installed inside the bottom of the sleeve (11).

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