CN116920516A - Breathable oil-proof filter element, and preparation method and application thereof - Google Patents

Breathable oil-proof filter element, and preparation method and application thereof Download PDF

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Publication number
CN116920516A
CN116920516A CN202311090379.5A CN202311090379A CN116920516A CN 116920516 A CN116920516 A CN 116920516A CN 202311090379 A CN202311090379 A CN 202311090379A CN 116920516 A CN116920516 A CN 116920516A
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CN
China
Prior art keywords
filter element
oil
base cloth
preparing
breathable
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Pending
Application number
CN202311090379.5A
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Chinese (zh)
Inventor
吴重慧
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Guangzhou Huiming Fiber Products Co ltd
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Guangzhou Huiming Fiber Products Co ltd
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Publication date
Application filed by Guangzhou Huiming Fiber Products Co ltd filed Critical Guangzhou Huiming Fiber Products Co ltd
Priority to CN202311090379.5A priority Critical patent/CN116920516A/en
Publication of CN116920516A publication Critical patent/CN116920516A/en
Priority to CN202410162219.5A priority patent/CN118007313A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0464—Impregnants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0609—Knitted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0636—Two or more types of fibres present in the filter material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0659—The layers being joined by needling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Filtering Materials (AREA)

Abstract

The invention discloses a ventilation and oil-proof filter element, which comprises the following steps: taking wool and viscose fibers, and needling the wool and the viscose fibers into single-layer filtering base cloth through a needling machine; compounding more than two layers of single-layer filter base cloth to prepare a rudiment base cloth of the filter element; flattening the filter element embryonic base cloth; preparing a three-proofing finishing solution, and then arranging the flattened filter element embryonic form base in the prepared three-proofing finishing solution for soaking; pressing, drying and shaping. The invention also discloses application of the breathable oil-proof filter element. The invention can solve the problems of blockage and oil leakage caused by the adhesion of oil mist to the automobile oil-related parts.

Description

Breathable oil-proof filter element, and preparation method and application thereof
Technical Field
The invention relates to the technical field of filter elements, in particular to a breathable and oil-proof filter element.
Background
The daily high-temperature operation of oil-related equipment such as automobile speed reducers, gearboxes and the like can cause the pressure change in the assembly and oil mist and oil gas phenomena. When the automobile single-body valve is opened, oil mist can be carried out. The common core material is also blocked by the attached oil mist when the oil mist passes through, so that oil leakage is caused. Therefore, there is a need to develop a filter core material which has good air permeability and is highly oil-repellent.
Disclosure of Invention
The invention aims to overcome the defect that the common core material in the prior art is attached with oil mist when the oil mist passes through, and provides a breathable and oil-proof filter element.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the preparation method of the breathable oil-proof filter element comprises the following steps:
preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into single-layer filtering base cloth through a needling machine;
preparing a filter element embryonic base cloth: compounding more than two layers of single-layer filter base cloth to prepare a rudiment base cloth of the filter element;
flattening: flattening the filter element embryonic base cloth;
three-proofing arrangement: preparing a three-proofing finishing solution, and then arranging the flattened filter element embryonic form base in the prepared three-proofing finishing solution for soaking;
pressing the soaked filter element embryonic base cloth to dry, drying and shaping.
Further, in the step of preparing the single-layer filter base cloth, the weight ratio of the wool to the viscose fiber is 1: (2-3), the needling speed of the needling machine is 600-900 times/min.
Further, the thickness of the single-layer filtering base cloth is 2.5-3.5mm.
Further, in the step of preparing the filter element embryonic base cloth, four layers of single-layer filter base cloth are adopted to carry out needling compounding through a low-speed needling machine, and the needling speed of the low-speed needling machine is 300-500 times/min.
Further, the three-proofing finishing solution is prepared by dissolving a three-proofing finishing agent in water, and the mass ratio of the three-proofing finishing agent to the water is 1: (20-30).
Further, the three-proofing finishing solution is prepared by dissolving a three-proofing finishing agent and polyvinyl alcohol in water, wherein the three-proofing finishing agent is O Li Fuan CPCO, and the mass ratio of the three-proofing finishing agent to the polyvinyl alcohol is (5-6): 1.
further, the drying temperature is 140-150 ℃.
Further, the wool gauge is 6d x 64mm, and the viscose gauge is 3d x 51mm.
The invention also provides application of the air-permeable and oil-proof filter element, and the air-permeable and oil-proof filter element is used for preparing oil-related devices of automobiles. The oil-related devices include, but are not limited to, gearboxes, speed reducers, check valves of automobiles.
Compared with the prior art, the invention has the beneficial effects that:
the breathable oil-proof filter element adopts wool and viscose fibers as raw materials, and the raw materials are flame-retardant fibers, so that the raw materials are compounded into the filter element embryonic base cloth with the required thickness through needling, and the filter element embryonic base cloth achieves better fluffiness, good ventilation effect and good flame retardance after a needling process; the three-proofing finishing agent is adopted for soaking, so that the surface of the material has ultrahigh waterproof, oil-proof and antifouling effects from inside to outside, the material is comprehensively absorbed by the three-proofing finishing agent after being pressed to dryness and enters a drying box for drying, and finally the shaped product has the characteristics of excellent oil proofing, water proofing, antifouling, flame retardance and ventilation, is not easy to carbonize, is high in high temperature resistance and ventilation efficiency, is applied to oil-related parts of automobiles, blocks oil impact and cools oil mist, and solves the problems of blockage and oil leakage caused by the adhesion of the oil mist to the oil-related parts of automobiles.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic representation of a basic layout of a cartridge blank for a breathable and oil resistant filter cartridge in accordance with an embodiment of the present invention;
FIG. 2 is a diagram of a breathable and oil-resistant filter cartridge in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of a breathable oil resistant filter element according to an embodiment of the present invention in a water and oil environment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present invention are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a ventilation and oil-proof filter element, which is prepared by the following method: firstly, taking wool and viscose fibers, and needling the wool and the viscose fibers into single-layer filter base cloth through a needling machine; then, compounding more than two layers of single-layer filter base cloth to prepare a rudiment base cloth of the filter element; flattening the filter element embryonic base cloth; preparing a three-proofing finishing solution, and then arranging the flattened filter element embryonic form base in the prepared three-proofing finishing solution for soaking; and pressing the soaked filter element embryonic base cloth to dry, drying and shaping to obtain the air-permeable oil-proof filter element.
The present embodiment will be described in more detail with reference to the accompanying drawings.
The breathable oil-proof filter element is prepared by the following method:
preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into single-layer filtering base cloth through a needling machine;
preparing a filter element embryonic base cloth: compounding more than two layers of single-layer filter base cloth to prepare a rudiment base cloth of the filter element;
flattening: flattening the filter element embryonic base cloth;
three-proofing arrangement: preparing a three-proofing finishing solution, and then arranging the flattened filter element embryonic form base in the prepared three-proofing finishing solution for soaking;
pressing the soaked filter element embryonic base cloth to dry, drying and shaping.
In the step of preparing the single-layer filtering base cloth, wool and viscose are used as raw materials, and are flame-retardant fibers, and the raw materials are mixed by needling to form a semi-finished product of the breathable oil-proof filtering core. In this embodiment, the wool gauge is 6d x 64mm, and the viscose gauge is 3d x 51mm. The weight ratio of the wool to the viscose fiber is 1: (2-3). In this embodiment, 30% wool and 70% viscose are preferably needled. The thickness of the single-layer filtering base cloth is 2.5-3.5mm, preferably 3mm, and the needling speed of the needling machine is 600-900 times/min.
In the step of preparing the filter element embryonic base cloth, needling compounding is preferably carried out by a low-speed needling machine through four layers of single-layer filter base cloth, wherein the needling speed of the low-speed needling machine is 300-500 times/min.
In the embodiment, the single-layer filter base fabric is prepared at the needling speed of 600-900 times/min, so that wool and viscose fibers can be well fused, and the fluffiness of the single-layer filter base fabric in multi-layer compounding can be reserved; the needling speed of 300-500 times/min is adopted in the preparation of the filter element embryonic base cloth, so that the composite multi-layer structure can be in a good loosening state, and the final product has good air permeability.
In the flattening step, a calender is adopted for flattening, the flattening temperature of the calender is 120-130 ℃, and the filter element embryonic base cloth passes through the calender at a speed of 3 meters per minute. The flattened rudiment base cloth of the filter element is shown in figure 1.
In the three-proofing finishing step, a three-proofing finishing agent with waterproof, oil-proof and antifouling functions is adopted to be dissolved in water, so that a three-proofing finishing solution is prepared. Specifically, the three-proofing finishing agent and water are mixed according to the weight ratio of 1: and (20-30), adding the three-proofing finishing agent into water, and uniformly stirring by using a stirrer. And then pouring the three-proofing finishing solution into a dipping machine, and uniformly dipping the flattened filter element embryonic base cloth through the dipping machine. In this embodiment, the three-proofing agent is o Li Fuan CPCO. In a preferred embodiment, the three-proofing finishing solution is prepared by dissolving the three-proofing finishing agent of Or Li Fu A CPCO and polyvinyl alcohol in water. After the polyvinyl alcohol is added into the three-proofing finishing solution, the water-proof, oil-proof and antifouling properties of the product are obviously improved. Specifically, the three-proofing finishing agent is Orthosiphon Li Fuan CPCO, and the mass ratio of the three-proofing finishing agent to the polyvinyl alcohol is (5-6): 1.
pressing the soaked filter element embryonic base cloth by a grouting machine, and then entering a drying box to be dried in the environment of 140-150 ℃. During drying, the materials are circularly dried for 3 times at the speed of 3 meters per minute through an upper net belt and a lower net belt. And after the drying is finished, shaping and rolling by a cooling machine. After shaping, the filter element is sheared into the air-permeable and oil-proof filter element with the required size by die cutting, as shown in figure 2.
The air-permeable and oil-resistant filter element of the present embodiment does not sink in oil or water. As shown in fig. 3, the air-permeable and oil-proof filter element of the present embodiment is placed in a water bottle and an oil bottle, and the air-permeable and oil-proof filter element floats on the surface of the liquid.
The breathable oil-proof filter core of the embodiment has the advantages of oil proofing, water proofing, flame retardance and high ventilation efficiency, is not easy to carbonize in filtration and is high in temperature resistance, and the breathable oil-proof filter core of the embodiment can be used for 103 times through circulating ventilation according to the requirement that the air permeability is less than or equal to 50 mm/s.
In view of the advantages of oil proofing, water proofing, flame retardance and high ventilation efficiency of the breathable oil-proof filter core in the embodiment, the breathable oil-proof filter core has the advantages of being difficult to carbonize in filtering and resistant to high temperature, is suitable for being used in oil-related devices of automobiles, such as gearboxes, reducers and one-way valves of automobiles, can block the impact of oil liquid when oil mist passes through, cools the oil mist, and prevents blockage and oil leakage events.
Example 1
The breathable oil-proof filter element is prepared by the following method:
(1) Preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into a single-layer filter base cloth through a needling machine, wherein the specification of the wool is 6D x 64mm, the specification of the viscose fibers is 3D x 51mm, and the weight ratio of the wool to the viscose fibers is 1:2, the needling speed of the needling machine is 600 times/min, and the thickness of the single-layer filter base cloth formed by needling is 2.5mm.
(2) Preparing a filter element embryonic base cloth: the four layers of single-layer filtering base cloth are subjected to needling compounding through a low-speed needling machine, the needling speed of the low-speed needling machine is 500 times/min,
(3) Flattening: flattening the filter element prototype base cloth by adopting a calender, wherein the flattening temperature of the calender is 130 ℃, and the filter element prototype base cloth passes through the calender at a speed of 3 meters per minute.
(4) Three-proofing arrangement: preparing a three-proofing finishing solution with a waterproof, oil-proof and antifouling function, pouring the three-proofing finishing solution into a gumming machine, and uniformly dipping the flattened filter element embryonic base cloth through the gumming machine. The three-proofing finishing solution is prepared by dissolving Olifluo-an CPCO and polyvinyl alcohol in water, and comprises 1 part of Olifluo-an Li Fuan CPCO, 20 parts of water and 0.5 part of polyvinyl alcohol by weight.
(5) Pressing the soaked filter element embryonic base cloth to dry, drying and shaping: the soaked filter element embryonic base cloth is pressed to be dry by a grouting machine, and then enters a drying box to be dried in the environment of 140 ℃. During drying, the materials are circularly dried for 3 times at the speed of 3 meters per minute through an upper net belt and a lower net belt. And after the drying is finished, shaping and rolling by a cooling machine. After shaping, the filter element is sheared into the air-permeable and oil-proof filter element with the required size through die cutting and punching.
Example 2
The breathable oil-proof filter element is prepared by the following method:
(1) Preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into a single-layer filter base cloth through a needling machine, wherein the specification of the wool is 6D x 64mm, the specification of the viscose fibers is 3D x 51mm, and the weight ratio of the wool to the viscose fibers is 3: and 7, the needling speed of the needling machine is 900 times/min, and the thickness of the single-layer filter base cloth formed by needling is 3mm.
(2) Preparing a filter element embryonic base cloth: the four layers of single-layer filtering base cloth are subjected to needling compounding through a low-speed needling machine, the needling speed of the low-speed needling machine is 300 times/min,
(3) Flattening: flattening the filter element prototype base cloth by adopting a calender, wherein the flattening temperature of the calender is 120 ℃, and the filter element prototype base cloth passes through the calender at a speed of 3 meters per minute.
(4) Three-proofing arrangement: preparing a three-proofing finishing solution with a waterproof, oil-proof and antifouling function, pouring the three-proofing finishing solution into a gumming machine, and uniformly dipping the flattened filter element embryonic base cloth through the gumming machine. The three-proofing finishing solution is prepared by dissolving Olive fluorine-containing CPCO and polyvinyl alcohol in water, and comprises 1 part of Olive Li Fuan CPCO, 25 parts of water and 0.55 part of polyvinyl alcohol by weight.
(5) Pressing the soaked filter element embryonic base cloth to dry, drying and shaping: the soaked filter element embryonic base cloth is pressed to be dry by a grouting machine, and then enters a drying box to be dried in the environment of 150 ℃. During drying, the materials are circularly dried for 3 times at the speed of 3 meters per minute through an upper net belt and a lower net belt. And after the drying is finished, shaping and rolling by a cooling machine. After shaping, the filter element is sheared into the air-permeable and oil-proof filter element with the required size through die cutting and punching.
Example 3
The breathable oil-proof filter element is prepared by the following method:
(1) Preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into a single-layer filter base cloth through a needling machine, wherein the specification of the wool is 6D x 64mm, the specification of the viscose fibers is 3D x 51mm, and the weight ratio of the wool to the viscose fibers is 1: and 3, the needling speed of the needling machine is 700 times/min, and the thickness of the single-layer filter base cloth formed by needling is 3mm.
(2) Preparing a filter element embryonic base cloth: the four layers of single-layer filtering base cloth are subjected to needling compounding through a low-speed needling machine, the needling speed of the low-speed needling machine is 400 times/min,
(3) Flattening: flattening the filter element prototype base cloth by adopting a calender, wherein the flattening temperature of the calender is 125 ℃, and the filter element prototype base cloth passes through the calender at a speed of 3 meters per minute.
(4) Three-proofing arrangement: preparing a three-proofing finishing solution with a waterproof, oil-proof and antifouling function, pouring the three-proofing finishing solution into a gumming machine, and uniformly dipping the flattened filter element embryonic base cloth through the gumming machine. The three-proofing finishing solution is prepared by dissolving Olive fluorine-containing CPCO and polyvinyl alcohol in water, and comprises 1 part of Olive Li Fuan CPCO, 30 parts of water and 0.6 part of polyvinyl alcohol by weight.
(5) Pressing the soaked filter element embryonic base cloth to dry, drying and shaping: the soaked filter element embryonic base cloth is pressed to be dry by a grouting machine, and then enters a drying box to be dried in the environment of 145 ℃. During drying, the materials are circularly dried for 3 times at the speed of 3 meters per minute through an upper net belt and a lower net belt. And after the drying is finished, shaping and rolling by a cooling machine. After shaping, the filter element is sheared into the air-permeable and oil-proof filter element with the required size through die cutting and punching.
Example 4
The breathable oil-proof filter element is prepared by the following method:
(1) Preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into a single-layer filter base cloth through a needling machine, wherein the specification of the wool is 6D x 64mm, the specification of the viscose fibers is 3D x 51mm, and the weight ratio of the wool to the viscose fibers is 1: and 3, the needling speed of the needling machine is 700 times/min, and the thickness of the single-layer filter base cloth formed by needling is 3mm.
(2) Preparing a filter element embryonic base cloth: the four layers of single-layer filtering base cloth are subjected to needling compounding through a low-speed needling machine, the needling speed of the low-speed needling machine is 400 times/min,
(3) Flattening: flattening the filter element prototype base cloth by adopting a calender, wherein the flattening temperature of the calender is 125 ℃, and the filter element prototype base cloth passes through the calender at a speed of 3 meters per minute.
(4) Three-proofing arrangement: preparing a three-proofing finishing solution with a waterproof, oil-proof and antifouling function, pouring the three-proofing finishing solution into a gumming machine, and uniformly dipping the flattened filter element embryonic base cloth through the gumming machine. The three-proofing finishing solution is prepared by dissolving Olive fluorine-containing CPCO in water, and comprises 1 part by weight of Olive Li Fuan CPCO and 30 parts by weight of water.
(5) Pressing the soaked filter element embryonic base cloth to dry, drying and shaping: the soaked filter element embryonic base cloth is pressed to be dry by a grouting machine, and then enters a drying box to be dried in the environment of 145 ℃. During drying, the materials are circularly dried for 3 times at the speed of 3 meters per minute through an upper net belt and a lower net belt. And after the drying is finished, shaping and rolling by a cooling machine. After shaping, the filter element is sheared into the air-permeable and oil-proof filter element with the required size through die cutting and punching.
Performance test:
(1) Waterproof performance test: the waterproof performance of the breathable and oil-proof filter element is simulated according to an AATCC 22 low-speed spray test.
(2) Oil repellency test: the air-permeable oil-proof filter element is subjected to oil-proof performance test according to AATCC 118 'oil-proof hydrocarbon test'.
(3) Stain resistance test: the liquid stain resistance of the breathable oil-resistant filter element was tested according to GB/T30159.1.
(4) Test results are shown in Table 1 below
TABLE 1 Performance test results
Waterproof scoring criteria:
100 points: the surface of the test sample has no adhesive water drop and no wetting;
and (4) 90: the surface of the test sample has slight irregular water drop adhesion and small amount of wetting;
80: the sprayed area of the test sample surface was slightly wetted.
Oil-repellency rating:
5 stages: the test liquid is n-dodecane
Stage 6: the test liquid is n-decane
7 stages: the test liquid is n-octane
8 stages: the test liquid was n-heptane
Antifouling grade:
5 stages: the liquid drop is clear, has a good arc shape with a large contact angle, and has no wetting with the contact area of the liquid drop and the sample; 4 stages: the surface of the liquid drop, which is contacted with the sample, is partially or completely darkened, and about 3/4 of the liquid drop amount is reserved on the surface of the sample; 3 stages: the surface of the droplet in contact with the sample is partially or completely darkened, and about 1/2 the amount of the droplet remains on the sample surface. From the test results, the addition of the polyvinyl alcohol into the three-proofing finishing solution can improve the waterproof performance, the oil-proofing performance and the antifouling performance.
The above describes in detail a ventilation and oil-proof filter element disclosed in the embodiment of the present invention, and its preparation method and application, and specific examples are applied herein to illustrate the principles and embodiments of the present invention, and the above description of the examples is only for helping to understand the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (10)

1. The preparation method of the breathable oil-proof filter element is characterized by comprising the following steps of:
preparing a single-layer filter base fabric: taking wool and viscose fibers, and needling the wool and the viscose fibers into single-layer filtering base cloth through a needling machine;
preparing a filter element embryonic base cloth: compounding more than two layers of single-layer filter base cloth to prepare a rudiment base cloth of the filter element;
flattening: flattening the filter element embryonic base cloth;
three-proofing arrangement: preparing a three-proofing finishing solution, and then arranging the flattened filter element embryonic form base in the prepared three-proofing finishing solution for soaking;
pressing the soaked filter element embryonic base cloth to dry, drying and shaping.
2. The method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: in the step of preparing the single-layer filter base cloth, the weight ratio of the wool to the viscose fiber is 1: (2-3), the needling speed of the needling machine is 600-900 times/min.
3. The method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: the thickness of the single-layer filtering base cloth is 2.5-3.5mm.
4. The method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: in the step of preparing the filter element embryonic base cloth, four layers of single-layer filter base cloth are adopted to carry out needling compounding through a low-speed needling machine, wherein the needling speed of the low-speed needling machine is 300-500 times/min.
5. The method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: the three-proofing finishing solution is prepared by dissolving a three-proofing finishing agent in water, and the mass ratio of the three-proofing finishing agent to the water is 1: (20-30).
6. The method for preparing the breathable and oil-proof filter element according to claim 5, wherein the method comprises the following steps: the three-proofing finishing solution is prepared by dissolving a three-proofing finishing agent and polyvinyl alcohol in water, wherein the three-proofing finishing agent is O Li Fuan CPCO, and the mass ratio of the three-proofing finishing agent to the polyvinyl alcohol is (5-6): 1.
7. the method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: the drying temperature is 140-150 ℃.
8. The method for preparing the breathable and oil-proof filter element according to claim 1, wherein the method comprises the following steps: the wool specification is 6 D.times.64 mm, and the viscose fiber specification is 3 D.times.51 mm.
9. A breathable oil-resistant filter element, characterized in that: a method according to any one of claims 1 to 8.
10. Use of a gas-permeable oil-resistant filter cartridge according to claim 9, characterized in that: the breathable oil-proof filter core is applied to preparing oil-related devices of automobiles.
CN202311090379.5A 2023-08-28 2023-08-28 Breathable oil-proof filter element, and preparation method and application thereof Pending CN116920516A (en)

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Application publication date: 20231024