An oil-related device

Abstract

The application discloses an air-permeable oil-proof filter core and a preparation method thereof and application of the air-permeable oil-proof filter core.

Description

Technical Field

[0001] This invention relates to the field of filter element technology, and more particularly to a breathable and oil-proof filter element. Background Technology

[0002] The high temperatures during daily operation of oil-related equipment such as automotive reducers and transmissions can cause internal pressure changes and the formation of oil mist and oil vapor. Oil mist can also be released when a single valve in a car opens. Ordinary filter materials can trap oil mist, causing blockages and leaks. Therefore, there is a need to develop a filter material that is both highly breathable and highly oil-resistant. Summary of the Invention

[0003] The purpose of this invention is to overcome the defect of ordinary core materials in the prior art that adhere to oil mist when oil mist passes through, and to provide a filter core that is both breathable and oil-proof.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for preparing a breathable and oil-resistant filter element includes the following steps:

[0006] Preparation of single-layer filter base fabric: Wool and viscose fiber are needle-punched into a single-layer filter base fabric using a needle punching machine;

[0007] Preparation of filter element prototype base fabric: Composite two or more single-layer filter base fabrics to form filter element prototype base fabric;

[0008] Flattening: Flatten the filter element base fabric;

[0009] Three-proof finishing: Prepare the three-proof finishing solution, and then place the flattened filter cartridge prototype base in the prepared three-proof finishing agent solution for immersion;

[0010] After soaking, the filter cartridge prototype base cloth is pressed dry, dried, and shaped.

[0011] Furthermore, in the step of preparing the single-layer filter base fabric, the weight ratio of the wool to the viscose fiber is 1:(2-3), and the needle punching speed of the needle punching machine is 600-900 times / min.

[0012] Furthermore, the thickness of the single-layer filter base cloth is 2.5-3.5 mm.

[0013] Furthermore, in the step of preparing the filter element prototype base fabric, a four-layer single-layer filter base fabric is needled and composited using a low-speed needle punching machine, wherein the needle punching speed of the low-speed needle punching machine is 300-500 times / min.

[0014] Furthermore, the three-proof finishing solution is prepared by dissolving the three-proof finishing agent in water, and the mass ratio of the three-proof finishing agent to water is 1:(20-30).

[0015] Further, the three-proofing finishing solution is prepared by dissolving a three-proofing finishing agent and polyvinyl alcohol in water, the three-proofing finishing agent is Oligofluorocarbon CPCO, and a mass ratio of the three-proofing finishing agent to the polyvinyl alcohol is (5-6) : 1.

[0016] Further, the drying temperature is 140-150 DEG C.

[0017] Further, the wool specification is 6D*64mm, and the viscose fiber specification is 3D*51mm.

[0018] The application further provides application of the air-permeable oil-proof filter core.

[0019] Compared with the prior art, the air-permeable oil-proof filter core has the following beneficial effects:

[0020] The air-permeable oil-proof filter core adopts wool and viscose fiber as raw materials, both of which are flame-retardant fibers, and the filter core embryonic base cloth with a required thickness is formed by needling, and after the needling process, a better bulkiness is achieved, the air permeation effect is good, and the flame-retardant performance is good; the three-proofing finishing agent is soaked, so that the material surface is waterproof, oil-proof and dirt-proof, and the material has super-high waterproof, oil-proof and dirt-proof effects from inside to outside, the material is pressed and dried to enter a drying oven to make the material fully absorb the three-proofing finishing agent, and finally the product has excellent oil-proof, waterproof, dirt-proof, flame-retardant and air-permeable characteristics, is not easy to carbonize, is resistant to high temperature, has high air permeation efficiency, is applied to oil-related parts of a vehicle to block oil liquid impact and cool oil mist, and solves the problems of blockage and oil leakage caused by oil mist attached to the oil-related parts of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is a filter core embryonic base cloth diagram of an air-permeable oil-proof filter core disclosed by the embodiments of the present application;

[0023] Figure 2 It is a diagram of an air-permeable oil-proof filter core disclosed by the embodiments of the present application;

[0024] Figure 3 It is a schematic diagram of an air-permeable oil-proof filter core disclosed by the embodiments of the present application in water and oil environment. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application are used to distinguish different objects, rather than to describe a specific order. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0027] The embodiment of the present application discloses a breathable oil-proof filter element, which is made by the following method: first, wool and viscose fibers are needled into a single-layer filter base cloth by a needle punching machine; then two or more single-layer filter base cloths are compounded to make a filter element rough base cloth; then the filter element rough base cloth is flattened; then a three-proofing finishing solution is prepared, and then the flattened filter element rough base cloth is soaked in the prepared three-proofing finishing solution; the soaked filter element rough base cloth is pressed dry, dried and shaped to obtain the breathable oil-proof filter element.

[0028] The present embodiment will be described in more detail below with reference to the drawings.

[0029] A breathable oil-proof filter element is prepared by the following method:

[0030] Preparation of single-layer filter base cloth: wool and viscose fibers are needled into a single-layer filter base cloth by a needle punching machine;

[0031] Preparation of filter element rough base cloth: two or more single-layer filter base cloths are compounded to make a filter element rough base cloth;

[0032] Flattening: the filter element rough base cloth is flattened;

[0033] Three-proofing finishing: a three-proofing finishing solution is prepared, and then the flattened filter element rough base cloth is soaked in the prepared three-proofing finishing solution;

[0034] The soaked filter element rough base cloth is pressed dry, dried and shaped.

[0035] In the step of preparing the single-layer filter base cloth, wool and viscose fibers are used as raw materials, both of which are flame-retardant fibers. After being mixed by needling, they become semi-finished raw materials of the air-permeable and oil-proof filter core. In the embodiment, the wool has a specification of 6D*64mm, and the viscose fiber has a specification of 3D*51mm. The weight ratio of the wool to the viscose fiber is 1:(2-3). In the embodiment, 30% wool and 70% viscose fiber are mixed and needled. The thickness of the single-layer filter base cloth is 2.5-3.5mm, and preferably 3mm. The needling speed of the needling machine is 600-900 times / min.

[0036] In the step of preparing the filter core prototype base cloth, the four single-layer filter base cloths are preferably needled by a low-speed needling machine, and the needling speed of the low-speed needling machine is 300-500 times / min.

[0037] In the embodiment, the single-layer filter base cloth is prepared by using a needling speed of 600-900 times / min, which can make the wool and the viscose fiber better fused and reserve the loftiness when the multiple layers are compounded. When the filter core prototype base cloth is prepared, the needling speed is 300-500 times / min, so that the multiple layers after being compounded can be in a better loftiness state, and the air permeability of the final product is good.

[0038] In the flattening step, a calender is used for flattening, and the temperature of the calender is 120-130℃. The filter core prototype base cloth passes through the calender at a speed of 3 meters per minute. The flattened filter core prototype base cloth is shown in FIG. 2. Figure 1

[0039] In the three-proofing finishing step, a three-proofing finishing agent with water-proof, oil-proof and dirt-proof functions is dissolved in water to prepare a three-proofing finishing solution. Specifically, the three-proofing finishing agent and water are mixed according to a weight ratio of 1:(20-30), and the three-proofing finishing agent is added to the water and stirred uniformly by a blender. Then, the three-proofing finishing solution is poured into a glue dipping machine, and the flattened filter core prototype base cloth is soaked uniformly by the glue dipping machine. In the embodiment, the three-proofing finishing agent is Oligo Fluoro CPO. In the preferred embodiment, the three-proofing finishing solution is prepared by dissolving the three-proofing finishing agent Oligo Fluoro CPO and polyvinyl alcohol in water. After the polyvinyl alcohol is added to the three-proofing finishing solution, the water-proof, oil-proof and dirt-proof performance of the product is obviously improved. Specifically, the three-proofing finishing agent is Oligo Fluoro CPO, and the mass ratio of the three-proofing finishing agent to the polyvinyl alcohol is (5-6):1.

[0040] ​The filter core blank after soaking is dried by a press machine, and then enters a drying oven and is dried at an environment of 140-150°C. During drying, the filter core blank is circulated and dried for 3 times by upper and lower mesh belts at a speed of 3 meters per minute. After drying, the filter core blank is shaped and rolled by a cooling machine. After shaping, the filter core blank is cut into a required size by a die cutting punch, as shown in FIG. 1. Figure 2

[0041] The oil-proof and air-permeable filter core of the present embodiment does not sink in oil or water. As shown in FIG. 2, the oil-proof and air-permeable filter core of the present embodiment is placed in a water bottle and an oil bottle, and the oil-proof and air-permeable filter core floats on the surface of the liquid. Figure 3

[0042] The oil-proof and air-permeable filter core of the present embodiment has the advantages of oil-proof, water-proof, fire-proof, high air-permeability, and is not easy to carbonize during filtration, and is resistant to high temperature. According to the requirement of air permeability ≤50mm / s, the oil-proof and air-permeable filter core of the present embodiment can be used for 103 times after circulation.

[0043] The oil-proof and air-permeable filter core of the present embodiment has the advantages of oil-proof, water-proof, fire-proof, high air-permeability, and is not easy to carbonize during filtration, and is resistant to high temperature. The oil-proof and air-permeable filter core of the present embodiment is suitable for use in oil-related devices of a vehicle, such as a gearbox, a speed reducer, and a one-way valve of the vehicle. When oil mist passes through, the oil-proof and air-permeable filter core can block the impact of oil, cool the oil mist, and prevent the occurrence of events such as blockage and oil leakage.

[0044] Example 1

[0045] An oil-proof and air-permeable filter core is prepared by the following method:

[0046] (1) Preparing a single-layer filter base cloth: wool and viscose fibers are needled into a single-layer filter base cloth by a needle punching machine. The wool has a specification of 6D*64mm, the viscose fibers have a specification of 3D*51mm, and the weight ratio of the wool to the viscose fibers is 1:2. The needle punching speed of the needle punching machine is 600 times / min, and the thickness of the single-layer filter base cloth formed by needle punching is 2.5mm.

[0047] (2) Preparing a filter core blank: four single-layer filter base cloths are needled and compounded by a low-speed needle punching machine. The needle punching speed of the low-speed needle punching machine is 500 times / min,

[0048] (3) Flattening: the filter core blank is flattened by a calender. The flattening temperature of the calender is 130°C, and the filter core blank passes through the calender at a speed of 3 meters per minute.

[0049] ​​(4) Three-proofing finishing: a three-proofing finishing solution with water-proof, oil-proof and dirt-proof functions is prepared, and the three-proofing finishing solution is poured into a dipping machine, and the flattened filter core prototype base cloth is evenly soaked by the dipping machine. The three-proofing finishing solution is prepared by dissolving Oleyfluor CPO and polyvinyl alcohol in water, and the weight parts are as follows: 1 part of Oleyfluor CPO, 20 parts of water and 0.5 part of polyvinyl alcohol.

[0050] (5) The filter core prototype base cloth after soaking is pressed dry, dried and shaped: the filter core prototype base cloth after soaking is pressed dry by a press, and then enters a drying box and is dried at an environment of 140°C. During drying, the upper and lower double mesh belts are used to circulate drying at a speed of 3 meters per minute for 3 times. After drying is completed, the filter core prototype base cloth is shaped and wound by a cooling machine. After shaping, the filter core prototype base cloth is cut into the required size of the air-permeable and oil-proof filter core by die cutting and punching.

[0051] Example 2

[0052] An air-permeable and oil-proof filter core is prepared by the following method:

[0053] (1) Preparation of single-layer filter base cloth: wool and viscose fibers are needled into single-layer filter base cloth by a needle punching machine, the wool is 6D*64mm, the viscose fibers are 3D*51mm, the weight ratio of the wool and the viscose fibers is 3:7, the needle punching speed of the needle punching machine is 900 times / min, and the thickness of the single-layer filter base cloth formed by needle punching is 3mm.

[0054] (2) Preparation of filter core prototype base cloth: four single-layer filter base cloths are needled and compounded by a low-speed needle punching machine, the needle punching speed of the low-speed needle punching machine is 300 times / min,

[0055] (3) Flattening: the filter core prototype base cloth is flattened by a calender, the flattening temperature of the calender is 120°C, and the filter core prototype base cloth passes through the calender at a speed of 3 meters per minute.

[0056] (4) Three-proofing finishing: a three-proofing finishing solution with water-proof, oil-proof and dirt-proof functions is prepared, and the three-proofing finishing solution is poured into a dipping machine, and the flattened filter core prototype base cloth is evenly soaked by the dipping machine. The three-proofing finishing solution is prepared by dissolving Oleyfluor CPO and polyvinyl alcohol in water, and the weight parts are as follows: 1 part of Oleyfluor CPO, 25 parts of water and 0.55 part of polyvinyl alcohol.

[0057] (5) The filter core prototype base cloth after soaking is pressed dry, dried and shaped: the filter core prototype base cloth after soaking is pressed dry by a press, and then enters a drying box and is dried at an environment of 150°C. During drying, the upper and lower double mesh belts are used to circulate drying at a speed of 3 meters per minute for 3 times. After drying is completed, the filter core prototype base cloth is shaped and wound by a cooling machine. After shaping, the filter core prototype base cloth is cut into the required size of the air-permeable and oil-proof filter core by die cutting and punching.

[0058] Example 3

[0059] A breathable and oil-proof filter core is prepared by the following method:

[0060] (1) Preparing a single-layer filter base cloth: wool and viscose fibers are needled into a single-layer filter base cloth by a needle punching machine, the wool has a specification of 6D*64mm, the viscose fibers have a specification of 3D*51mm, the weight ratio of the wool and the viscose fibers is 1:3, the needle punching speed of the needle punching machine is 700 times / min, and the thickness of the single-layer filter base cloth formed by needle punching is 3mm.

[0061] (2) Preparing a filter core rough base cloth: four single-layer filter base cloths are needled and compounded by a low-speed needle punching machine, the needle punching speed of the low-speed needle punching machine is 400 times / min,

[0062] (3) Flattening: the filter core rough base cloth is flattened by a calender, the flattening temperature of the calender is 125℃, and the filter core rough base cloth passes through the calender at a speed of 3 meters per minute.

[0063] (4) Three-proof finishing: a three-proof finishing solution with water-proof, oil-proof and dirt-proof functions is prepared, the three-proof finishing solution is poured into a glue dipping machine, and the flattened filter core rough base cloth is evenly soaked by the glue dipping machine. The three-proof finishing solution is prepared by dissolving Oligofluoroan CPCO and polyvinyl alcohol in water, and the weight ratio of Oligofluoroan CPCO, water and polyvinyl alcohol is 1:30:0.6.

[0064] (5) The filter core rough base cloth after soaking is pressed, dried and shaped: the filter core rough base cloth after soaking is pressed by a press, and then enters a drying oven and is dried in an environment at 145℃. During drying, the upper and lower mesh belts are circulated at a speed of 3 meters per minute for 3 times. After drying, the filter core rough base cloth is shaped and wound by a cooling machine. After shaping, the filter core rough base cloth is cut into the required size of the breathable and oil-proof filter core by a die cutting punch.

[0065] Example 4

[0066] A breathable and oil-proof filter core is prepared by the following method:

[0067] (1) Preparing a single-layer filter base cloth: wool and viscose fibers are needled into a single-layer filter base cloth by a needle punching machine, the wool has a specification of 6D*64mm, the viscose fibers have a specification of 3D*51mm, the weight ratio of the wool and the viscose fibers is 1:3, the needle punching speed of the needle punching machine is 700 times / min, and the thickness of the single-layer filter base cloth formed by needle punching is 3mm.

[0068] (2) Preparing the filter core blank base cloth: four single-layer filter base cloths are needle punched by a low-speed needle punching machine at a speed of 400 times / min,

[0069] (3) Flattening: the filter core blank base cloth is flattened by a calender, and the temperature of the calender is 125 DEG C. The filter core blank base cloth passes through the calender at a speed of 3 meters / min.

[0070] (4) Three-proofing finishing: a three-proofing finishing solution with water-proof, oil-proof and dirt-proof functions is prepared, and the three-proofing finishing solution is poured into a glue dipping machine. The flattened filter core blank base cloth is evenly soaked in the glue dipping machine. The three-proofing finishing solution is prepared by dissolving Oligo Fluoran CPCO in water, and the weight ratio of Oligo Fluoran CPCO to water is 1:30.

[0071] (5) After soaking, the filter core blank base cloth is pressed, dried and shaped: the soaked filter core blank base cloth is pressed by a press, and then enters a drying oven and is dried at 145 DEG C. During drying, the upper and lower mesh belts are circulated at a speed of 3 meters / min for 3 times. After drying, the shaped product is cooled and wound. After shaping, the product is cut by a die cutting punch to the required size of the air-permeable and oil-proof filter core.

[0072] Performance test:

[0073] (1) Water-proof performance test: the water-proof performance of the air-permeable and oil-proof filter core is tested according to AATCC 22 low-speed spray test.

[0074] (2) Oil-proof performance test: the oil-proof performance of the air-permeable and oil-proof filter core is tested according to AATCC 118 "oil repellency and hydrocarbon resistance test".

[0075] (3) Dirt-proof performance test: the liquid dirt stain resistance of the air-permeable and oil-proof filter core is tested according to GB / T 30159.1.

[0076] (4) The test results are shown in Table 1

[0077] Table 1 Performance test results

[0078]

[0079] Water-proof score standard:

[0080] 100 points: no water droplets adhere to the surface of the test sample, and no wetting;

[0081] 90 points: a small amount of irregular water droplets adhere to the surface of the test sample, and a small amount of wetting;

[0082] 80 points: the test sample has a small amount of wetting in the sprayed area.

[0083] Oil repellency rating:

[0084] 5: Test liquid is n-dodecane

[0085] 6: Test liquid is n-decane

[0086] 7: Test liquid is n-octane

[0087] 8: Test liquid is n-heptane

[0088] Stain repellency rating:

[0089] 5: Droplet is distinct with a perfect arc of large contact angle, no wetting of the test sample contact area by the droplet;

[0090] 4: Droplet is partially or completely dull on the test sample contact surface, about 3 / 4 of the droplet amount remains on the test sample surface;

[0091] 3: Droplet is partially or completely dull on the test sample contact surface, about 1 / 2 of the droplet amount remains on the test sample surface.

[0092] From the above test results, it can be seen that the addition of polyvinyl alcohol in the tri-proof finishing solution has a qualitative improvement in water resistance, oil resistance and stain resistance.

[0093] The above has carried out the detailed introduction to the air-permeable oil-proof filter core disclosed by the embodiment of the application, the preparation method and the application, the principle and the implementation mode of the application have been described in the text by applying specific examples, the above embodiment explanation is only for helping understanding the method of the application and its core idea; simultaneously, for the general technical personnel in the art, according to the idea of the application, there will be changes in the specific implementation mode and application range, and the above-mentioned description should not be understood as the limitation of the application.

Claims

1. A breathable and oil-resistant filter element, characterized in that, The method for preparing the breathable and oil-resistant filter element includes the following steps: Preparation of a single-layer filter base fabric: Wool and viscose fiber are needle-punched into a single-layer filter base fabric using a needle punching machine; the weight ratio of wool to viscose fiber is 1:(2-3), and the needle punching speed of the machine is 600-900 times / min; the thickness of the single-layer filter base fabric is 2.5-3.5mm; the wool fiber has a specification of 6D*64mm, and the viscose fiber has a specification of 3D*51mm; Preparation of filter element prototype base fabric: A four-layer single-layer filter base fabric is needle-punched and composited using a low-speed needle punching machine to prepare the filter element prototype base fabric; the needle punching speed of the low-speed needle punching machine is 300-500 times / min; Flattening: Flatten the filter element base fabric; Three-proof finishing: Prepare a three-proof finishing solution, and then place the flattened filter cartridge prototype base in the prepared three-proof finishing solution for immersion; the three-proof finishing solution is made by dissolving a three-proof finishing agent and polyvinyl alcohol in water, the three-proof finishing agent is Olifluan CPCO, and the mass ratio of the three-proof finishing agent to polyvinyl alcohol is (5-6):1; After soaking, the filter element prototype base fabric is flattened, dried, and shaped. In the flattening step, a calender is used for flattening. The calender temperature is 120-130℃, and the filter element prototype base fabric passes through the calender at a speed of 3 meters per minute. The drying temperature is 140-150℃. According to the requirement of air permeability ≤50mm / s, this breathable and oil-proof filter element can be used up to 103 times after repeated air circulation.

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