CN111773823A - Air filtering material capable of being sterilized by electric heating in situ and preparation method thereof - Google Patents

Air filtering material capable of being sterilized by electric heating in situ and preparation method thereof Download PDF

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Publication number
CN111773823A
CN111773823A CN202010697668.1A CN202010697668A CN111773823A CN 111773823 A CN111773823 A CN 111773823A CN 202010697668 A CN202010697668 A CN 202010697668A CN 111773823 A CN111773823 A CN 111773823A
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filter
fibers
situ
air
filtering
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CN111773823B (en
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宋彦龙
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Hebei Bohong Liko Environmental Technology Co ltd
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Hebei Bohong Liko Environmental Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003Glass or glassy material
    • B01D39/2017Glass or glassy material the material being filamentary or fibrous
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055Carbonaceous material
    • B01D39/2065Carbonaceous material the material being fibrous
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001Making filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0028Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0241Types of fibres, filaments or particles, self-supporting or supported materials comprising electrically conductive fibres or particles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10Filtering material manufacturing

Abstract

The invention provides an air filter material capable of being electrically heated and killed in situ, which comprises auxiliary fibers, filter fibers and an adhesive, wherein the auxiliary fibers are short cut carbon fibers, the fiber diameter range of the carbon fibers is 0.2-1.2 mu m, the fiber length range of the carbon fibers is 1-15mm, the filter fibers are one or more of glass microfiber cotton, plant fibers and chemical fibers, the beating degree of the filter fibers is more than or equal to 19 ℃, and the adhesive is one or more of melamine formaldehyde resin, polyacrylic emulsion and styrene-acrylic emulsion. By adopting the scheme, the obtained air filtering material has high-quality filtering capacity and can reach the filtering level of medium and high efficiency, and secondly, the air filtering material has excellent electric heating capacity, can remarkably improve the sterilizing efficiency and quality under the electric heating condition, and effectively prevents harmful microorganisms from continuously accumulating in the air filtering material.

Description

Air filtering material capable of being sterilized by electric heating in situ and preparation method thereof
The technical field is as follows:
the invention relates to the technical field of air filtration, in particular to an air filtration material capable of being subjected to in-situ electric heating sterilization and a preparation method thereof.
Background art:
along with the continuous progress of society, epidemic viruses having deep symbiotic relationship with human society are continuously mutated, especially in the event of high mobility of people, once a large-scale outbreak easily occurs, such as the current new crown epidemic situation, the life safety of human beings is seriously threatened. The traditional Chinese medicine preparation for treating epidemic diseases is difficult to effectively cure, and particularly needs to prepare for long-term epidemic disease resistance when special-effect medicines are lacked, at present, for diseases similar to novel coronavirus and with infection sources of viruses, bacteria and other microorganisms, the traditional Chinese medicine preparation can effectively protect by adopting a filtering material, for example, PP melt-spraying cloth used for medical care masks, glass fiber filtering materials used for high-efficiency filtering filter elements and the like can effectively block the viruses and bacteria in the filtering material, so that the viruses and bacteria cannot enter a human body or be discharged into a building body through air flow. Therefore, a high efficiency filter (HEPA) made of a filter material, particularly, glass fiber filter paper is widely used as a filter layer of an internal air filter, and can control the biological safety of internal environments such as hospital infectious disease rooms and negative pressure ambulances.
However, the filtering materials in the prior art, including PP meltblown, glass fiber filter paper, etc., can only retain and deposit viruses and bacteria in the filtering material, and harmful microorganisms can be accumulated in the filtering material continuously, and if the harmful microorganisms are not treated in time, serious secondary pollution is generated. At present, the air filter is prevented from being polluted, and auxiliary measures such as ultraviolet lamp irradiation, ozone oxidation sterilization and the like are basically adopted. However, the ultraviolet lamp tube irradiation method can only sterilize the surface of an object irradiated by the ultraviolet lamp, and the ultraviolet light cannot be used for sterilizing the object deposited inside the filter material or in the pleated filter paper because the ultraviolet light is difficult to cover. The by-product brought by the ozone oxidation sterilization mode is ozone which can kill viruses and bacteria and has strong oxidizing property and higher harmful effect on human bodies.
Therefore, there is a need in the art for an air filter material capable of in-situ electro-thermal sterilization and a preparation method thereof.
The invention is provided in view of the above.
The invention content is as follows:
the object of the present invention is to provide a device that can be used better to solve at least one of the technical problems of the prior art.
Specifically, the invention provides an air filter material capable of being electrically heated and killed in situ, which comprises auxiliary fibers, filter fibers and an adhesive, wherein the auxiliary fibers are short cut carbon fibers, the fiber diameter range of the carbon fibers is 0.2-1.2 mu m, the fiber length range of the carbon fibers is 1-15mm, the filter fibers are one or more of glass microfiber cotton, plant fibers and chemical fibers, the beating and beating degree of the filter fibers is more than or equal to 19 degrees, and the adhesive is one or more of melamine formaldehyde resin, polyacrylic acid emulsion and styrene-acrylic emulsion.
Adopt above-mentioned scheme, obtained air filtering material has high-quality filter capacity, can satisfy normal filter work's needs, can be to effectively filtering through other, secondly, air filtering material has good electric heating power, can show work efficiency and the operating mass with the work of killing under the improvement electric heat condition, and the effectual harmful microorganism that prevents constantly accumulates in air filtering material inside, prevents secondary pollution's emergence.
Preferably, the carbon fiber has a fiber diameter ranging from 0.4 to 1 μm.
Further, the fiber length of the carbon fiber ranges from 3 mm to 10 mm.
Furthermore, the filter fiber adopts glass microfiber cotton.
Further, the binder employs melamine formaldehyde resin.
By adopting the scheme, the obtained air filtering material has optimal filtering capacity, and can be quickly heated to the specified killing temperature after current is introduced.
Preferably, the in-situ electro-thermally sterilizable air filtration material comprises: the components by weight percentage are 0-20% of auxiliary fiber, 80-100% of filter fiber and 0-5% of adhesive.
Further, the air filter material capable of being electrically heated and killed in situ comprises: the following components by weight percent are auxiliary fiber 10%, filter fiber 87% and adhesive 3%.
By adopting the scheme, the obtained air filter material has excellent electric-heat conversion capacity, the capacity that the material is heated to the specified killing temperature quickly after current is introduced can be met, and the temperature of the air filter material is stably maintained at the killing temperature under the state that the current is introduced for a long time, so that the temperature transition is avoided.
Preferably, the air filter material capable of being electrically heated and killed in situ further comprises an auxiliary agent, wherein the auxiliary agent is used for improving the flexibility of the auxiliary fibers and the filter fibers, and the quality of the obtained finished air filter material can be obviously improved.
Furthermore, the auxiliary agent is tributyl phosphate, and the content of the auxiliary agent is 0.1-0.5% by weight.
Further, the content of the auxiliary agent is 0.3 percent by weight
By adopting the scheme, the flexibility of the obtained finished air filter material can be effectively improved, the electric conductivity of the obtained finished air filter material is stabilized, and the influence of temperature on the electric conductivity of the finished air filter material is reduced.
Preferably, the air filter material capable of being electrically heated and killed in situ further comprises an auxiliary agent, so that the electric conductivity of the obtained finished air filter material can be stabilized, and the finished air filter material tends to a stable value after being stably raised.
Furthermore, the auxiliary agent is spherical conductive titanium dioxide, and the addition amount of the spherical conductive titanium dioxide is 0.1-0.2% by weight.
Further, the addition amount of the spherical conductive titanium dioxide is 0.2% by weight.
By adopting the scheme, the electric conduction capability of the obtained finished air filter material can be stabilized, the filter material tends to a stable value after being stably increased, and the temperature is prevented from being continuously increased.
Specifically, the second aspect of the present invention further provides a preparation method of an in-situ electro-thermal sterilizing air filter material, wherein the preparation method of the in-situ electro-thermal sterilizing air filter material comprises the following steps:
pulping, namely preparing auxiliary fibers and filter fibers into pulp;
the preparation is that the adhesive is diluted into adhesive dispersion liquid by deionized water;
forming, namely forming the obtained slurry, then vacuumizing, and spraying adhesive dispersion liquid to the surface of the formed filter material base layer in a vacuumizing state;
drying, and drying the formed filter paper to obtain the finished product of the filter material.
By adopting the scheme, the traditional production process is optimized, and the production efficiency and the production quality of the in-situ electric heating air filtering material provided by the invention can be greatly improved.
Preferably, in the pulping step, the auxiliary fiber and the filter fiber are broken up by a hydraulic disperser and made into pulp with the concentration of 0.1-0.5% by weight and the pH value of 3-5.
Preferably, in the step of preparing, the dosage ratio of the adhesive to the deionized water is 1-5: 100.
Preferably, in the forming step, the obtained slurry is formed by using a gap former, a wet base layer is generated under the condition that the forming speed is 15-20m/min, and the obtained adhesive dispersion liquid is uniformly sprayed on the wet base layer under the vacuum state.
Preferably, in the drying step, drying is performed by using a drying cylinder, and the drying temperature is 160-.
By adopting the scheme, the quality of the finished product in-situ electro-thermal sterilizing air filter material can be greatly improved by carrying out the actual production process under the conditions.
Preferably, in the pulping step, an auxiliary agent is further added, and the auxiliary agent is added after the auxiliary fibers and the filter fibers are broken up.
Furthermore, the auxiliary agent is tributyl phosphate, and the content of the auxiliary agent is 0.1-0.5% by weight.
Further, the content of the auxiliary agent is 0.3 percent by weight
By adopting the scheme, the flexibility of the obtained finished air filter material can be effectively improved, the electric conductivity of the obtained finished air filter material is stabilized, and the influence of temperature on the electric conductivity of the finished air filter material is reduced.
Preferably, the forming step further comprises adding an auxiliary agent, wherein the auxiliary agent is uniformly spread on the surface of the formed filter material base layer, then vacuuming is carried out, and then the adhesive dispersion liquid is sprayed on the surface of the formed filter material base layer.
Furthermore, the auxiliary agent is spherical conductive titanium dioxide, and the addition amount of the spherical conductive titanium dioxide is 0.1-0.2% by weight.
Further, the addition amount of the spherical conductive titanium dioxide is 0.2% by weight.
By adopting the scheme, the electric conduction capability of the obtained finished air filter material can be stabilized, the filter material tends to a stable value after being stably increased, and the temperature is prevented from being continuously increased.
In particular, in a third aspect of the invention, a filter device is further provided, wherein the filter device comprises the air filter material capable of being electrically heated and killed in situ.
In particular, in a fourth aspect of the invention, an in-situ electrically-heated air filter element is also provided, and the in-situ electrically-heated air filter element comprises the in-situ electrically-heated air filter material.
In conclusion, the invention has the following beneficial effects:
1. the air filtering material provided by the invention has high-quality filtering capacity, can meet the requirement of normal filtering work, can effectively filter the air passing through the air filtering material, has excellent electric heating capacity, can obviously improve the working efficiency and working quality of sterilization work under an electric heating condition, effectively prevents harmful microorganisms from continuously accumulating in the air filtering material, and prevents secondary pollution;
2. the air filter material provided by the invention has excellent electrothermal conversion capability, can meet the requirement that the material has the capability of rapidly heating to the specified killing temperature after current is introduced, and can stably maintain the temperature of the air filter material at the killing temperature without temperature transition under the state of introducing current for a long time.
The specific implementation mode is as follows:
the exemplary embodiments will be described herein in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The present invention will be described in detail below by way of examples.
The invention has the conception that the carbon fiber is added into the air filtering material, so that the carbon fiber is taken as the skeleton fiber of the filtering material, and the carbon fiber is interwoven and hooked in the filtering material to form a three-dimensional net structure, thereby playing a role of supporting the skeleton of the filtering material on one hand, and on the other hand, because the carbon fiber has the conductive characteristic, the filtering material can generate heat when being connected with a power supply, so that the temperature of the integral filtering material is raised, and the in-situ killing function is realized.
Examples of the experiments
Scheme 1
The scheme provides an air filtering material capable of being electrically heated and killed in situ, which comprises 100% of glass microfiber cotton by weight, and the beating degree of the glass microfiber cotton is more than or equal to 19 degrees.
Scheme 2
The scheme provides an air filtering material capable of being electrically heated and killed in situ, which comprises 100% of carbon fibers by weight, wherein the fiber diameter range of the carbon fibers is 0.2-1.2 mu m, and the fiber length range is 1-15 mm.
Scheme 3
The scheme provides an air filtering material capable of being electrically heated and killed in situ, which comprises 50% of carbon fibers and 50% of glass microfiber cotton by weight, wherein the fiber diameter range of the carbon fibers is 0.4-1 mu m, the fiber length range is 3-10mm, and the beating and beating degree of the glass microfiber cotton is more than or equal to 19 degrees.
Scheme 4
The scheme provides an air filtering material capable of being electrically heated and killed in situ, which comprises 49% of carbon fibers, 49% of glass micro-fiber cotton and 2% of melamine formaldehyde resin by weight, wherein the fiber diameter range of the carbon fibers is 0.4-1 mu m, the fiber length range is 3-10mm, and the beating and beating degree of the glass micro-fiber cotton is more than or equal to 19 degrees.
Connecting 12V direct current at two ends of the air filtering material obtained in the scheme 1-4 with the length, width, thickness and size of 100cm, 100cm and 0.32mm, measuring the current value and the voltage value of the air filtering material obtained in the scheme 1-4 by adopting an Agilent high-precision current and voltage detector, calculating the resistance value of the air filtering material, and measuring the temperature rise of the air filtering material obtained in the scheme 1-4 by adopting an infrared thermometer at the room temperature of 25 ℃.
TABLE 1 influence of different raw material components on the conductivity and temperature-raising ability of the obtained air filtration material
As shown in table 1, when glass microfiber cotton is used as a single raw material, the obtained air filter material may be considered as an insulator, and cannot achieve the sterilization function in the inventive concept; when the carbon fiber is used as a single raw material, the obtained air filtering material has better conductive capability and cannot meet the temperature required by the sterilization function in the conception of the invention; when the glass microfiber cotton and carbon fiber composite raw materials are adopted, the electric conduction capability and the heating capability of the obtained air filtering material can be better considered; when the glass micro-fiber cotton, the carbon fiber and the melamine formaldehyde resin are adopted to meet the requirements of raw materials, the electric conduction capability and the heating capability of the obtained air filtering material can be enhanced, and the applicant believes that the melamine formaldehyde resin can effectively promote a framework formed by the carbon fiber and the glass micro-fiber cotton to form a three-dimensional network structure which is interwoven and hooked, and promotes the realization of the sterilization function in the conception of the invention.
Example 1
The embodiment provides an air filter material capable of being electrically heated and killed in situ, which comprises 100% of glass microfiber cotton by weight, wherein the beating degree of the glass microfiber cotton is more than or equal to 19 degrees.
Example 2
The embodiment provides an air filter material capable of being electrically heated and killed in situ, which comprises, by weight, 5% of carbon fibers, 93% of glass microfiber cotton and 2% of melamine formaldehyde resin, wherein the fiber diameter range of the carbon fibers is 0.4-1 μm, the fiber length range is 3-10mm, and the beating and beating degree of the glass microfiber cotton is more than or equal to 19 degrees.
Example 3
The embodiment provides an air filter material capable of being electrically heated and killed in situ, which comprises, by weight, 10% of carbon fibers, 87% of glass micro-fiber cotton and 3% of melamine formaldehyde resin, wherein the fiber diameter range of the carbon fibers is 0.4-1 μm, the fiber length range is 3-10mm, and the beating and beating degree of the glass micro-fiber cotton is more than or equal to 19 ℃.
Example 4
The embodiment provides an air filter material capable of being electrically heated and killed in situ, which comprises 15% of carbon fibers, 81% of glass microfiber cotton and 4% of melamine formaldehyde resin by weight, wherein the fiber diameter range of the carbon fibers is 0.4-1 mu m, the fiber length range is 3-10mm, and the beating and beating degree of the glass microfiber cotton is more than or equal to 19 ℃.
Example 5
The embodiment provides an air filter material capable of being electrically heated and killed in situ, which comprises 20% of carbon fibers, 75% of glass micro-fiber cotton and 5% of melamine formaldehyde resin by weight, wherein the fiber diameter range of the carbon fibers is 0.4-1 mu m, the fiber length range is 3-10mm, and the beating and beating degree of the glass micro-fiber cotton is more than or equal to 19 ℃.
The air filter materials obtained in examples 1 to 5, which had a length, width, and thickness of 100cm, and 0.32mm, were connected to a direct current of 12V at both ends, and the current and voltage values of the air filter materials obtained in examples 1 to 5 were measured by an Agilent high-precision current-voltage detector, and the resistance values thereof were calculated, and the temperature rise of the air filter materials obtained in examples 1 to 5 was measured by an infrared thermometer at 25 ℃.
TABLE 2 influence of different raw material ratios on the conductivity and temperature-raising capability of the obtained air filtering material
As shown in Table 2, the combination in the range of the mixture ratio provided by the invention can realize the sterilization function in the concept of the invention, and has the characteristics of high temperature rise speed and stable temperature maintenance after the temperature rise is finished, wherein when the mixture ratio is 10% of carbon fiber, 87% of glass microfiber cotton and 3% of melamine formaldehyde resin by weight, the combination has the optimal sterilization function and stable heating temperature.
Example 6
This embodiment is substantially the same as embodiment 3 except that: in this example 87% plant fiber was used.
Example 7
This embodiment is substantially the same as embodiment 3 except that: in this example 87% chemical fibres were used.
Example 8
This embodiment is substantially the same as embodiment 3 except that: in this example, a 3% polyacrylic emulsion was used.
Example 9
This embodiment is substantially the same as embodiment 3 except that: in this example, 3% styrene-acrylic emulsion was used.
The air filter materials obtained in examples 6 to 9, which had a length, width, and thickness of 100cm, and 0.32mm, were connected to a direct current of 12V at both ends, and a high-precision current-voltage detector of Agilent was used to measure the current values and voltage values of the air filter materials obtained in examples 6 to 9, and the resistance values thereof were calculated, and the temperature rise of the air filter materials obtained in examples 6 to 9 was measured at 25 ℃.
TABLE 3 Effect of different binders on the conductivity and temperature raising ability of the obtained air filtration Material
As shown in Table 3, the combination in the range of the mixture ratio provided by the invention can realize the killing function in the concept of the invention, and has the characteristics of high temperature rise speed and stable temperature maintenance after the temperature rise is finished, wherein when the melamine formaldehyde resin is selected as the adhesive, the obtained air filter material has the best temperature stability, and the temperature gradually does not change at 50 ℃ after being heated for 180 seconds, thereby being beneficial to use in actual production.
Example 10
This embodiment is substantially the same as embodiment 3 except that: in this example, 86.5% of glass microfiber cotton was used, and 0.5% by weight of tributyl phosphate was added.
Example 11
This embodiment is substantially the same as embodiment 3 except that: in this example, 86.7% of glass microfiber cotton was used, and 0.3% by weight of tributyl phosphate was added.
Example 12
This embodiment is substantially the same as embodiment 3 except that: in this example, 86.9% of glass microfiber cotton was used, and 0.1% by weight of tributyl phosphate was added.
The air filter materials obtained in examples 10 to 12, which had a length, width, and thickness of 100cm, and 0.32mm, were connected to a direct current of 12V at both ends, and the temperature of the air filter materials obtained in examples 10 to 12 was measured at 25 ℃ and room temperature using an infrared thermometer.
TABLE 4 influence of the auxiliary on the conductivity and temperature-raising ability of the obtained air filtration Material
As shown in table 4, in the combination within the range of the mixture ratio provided by the present invention, the addition of the additive tributyl phosphate can effectively enhance the temperature stability after the temperature rise, wherein the optimal air filter material can be obtained when the mixture ratio is 10% by weight of carbon fiber, 86.7% by weight of glass microfiber cotton, 3% by weight of melamine formaldehyde resin, and 0.3% by weight of tributyl phosphate.
Example 13
This embodiment is substantially the same as embodiment 3 except that: in the embodiment, 86.5% of glass microfiber cotton is adopted, and 0.3% of tributyl phosphate and 0.2% of spherical conductive titanium dioxide are added according to the weight.
Example 14
This embodiment is substantially the same as embodiment 3 except that: in the embodiment, 86.6% of glass microfiber cotton is adopted, and 0.3% of tributyl phosphate and 0.1% of spherical conductive titanium dioxide are added according to the weight.
The air filter materials obtained in examples 13 to 14, which had a length, width, and thickness of 100cm, and 0.32mm, were connected to a direct current of 12V at both ends, and the temperature of the air filter materials obtained in examples 13 to 14 was measured at 25 ℃ and room temperature using an infrared thermometer.
TABLE 5 Effect of adjuvants on the conductivity and temperature raising ability of the obtained air Filter Material
As shown in Table 5, the addition of the auxiliary spherical conductive titanium dioxide in the composition of the present invention in the range of the mixture ratio provided by the present invention can effectively enhance the temperature stability after the completion of the temperature rise, wherein the optimal air filtration material can be obtained when the mixture ratio is 10% carbon fiber, 86.5% glass microfiber cotton, 3% melamine formaldehyde resin, 0.3% tributyl phosphate, and 0.2% spherical conductive titanium dioxide by weight.
Example 15
The embodiment provides a preparation method of an in-situ electric heating sterilization air filter material, which comprises the following steps:
pulping, namely scattering auxiliary fibers and filter fibers by using a hydraulic dispersion machine to prepare slurry with the concentration of 0.3 percent and the pH value of 4 by weight;
the preparation is characterized in that an adhesive is diluted into adhesive dispersion liquid by deionized water, and the dosage ratio of the adhesive to the deionized water is 3: 100;
forming, namely forming the obtained slurry by using a mesh forming machine, generating a wet base layer under the condition that the forming speed is 15-20m/min, and uniformly spraying the obtained adhesive dispersion liquid on the wet base layer under the vacuum state;
drying, namely drying the obtained formed filter paper by adopting a drying cylinder at the drying temperature of 160-180 ℃ to obtain the finished product filter material.
Example 16
This example is substantially the same as example 15 except that: in the pulping step, the method further comprises an addition agent, wherein the addition agent is added after the auxiliary fiber and the filter fiber are scattered, the addition agent adopts tributyl phosphate, and the addition amount of the tributyl phosphate is 0.3% by weight.
Example 17
This example is substantially the same as example 15 except that: in the forming step, the auxiliary agent is added, after the auxiliary agent is uniformly spread on the surface of the formed filter material base layer, the auxiliary agent is vacuumized and then adhesive dispersion liquid is sprayed on the surface of the formed filter material base layer, the auxiliary agent is spherical conductive titanium dioxide, and the addition amount of the spherical conductive titanium dioxide is 0.2% by weight.
Example 18
This embodiment provides a filtration equipment, but filtration equipment includes the above-mentioned air filtration material that normal position electric heat disappears and kills, filtration equipment can be air filter, air purifier, air conditioner, ventilation equipment.
Example 19
The embodiment relates to an air filter element capable of being electrically heated and killed in situ, which comprises the air filter material capable of being electrically heated and killed in situ, and the air filter element can be an air filter element for replacing an air purifier.
It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. An air filter material capable of being sterilized by electric heat in situ is characterized in that: the air filtering material capable of being electrically heated and killed in situ comprises auxiliary fibers, filtering fibers and an adhesive, wherein the auxiliary fibers are short cut carbon fiber threads, the diameter range of the carbon fibers is 0.2-1.2 mu m, the length range of the carbon fibers is 1-15mm, the filtering fibers are one or more of glass microfiber cotton, plant fibers and chemical fibers, the beating and beating degree of the filtering fibers is more than or equal to 19 ℃, and the adhesive is one or more of melamine formaldehyde resin, polyacrylic emulsion and styrene-acrylic emulsion.
2. An in situ electro-thermally sterilizable air filtration material as recited in claim 1, wherein: the fiber diameter of the carbon fiber ranges from 0.4 to 1 μm.
3. An in situ electro-thermally sterilizable air filtration material as recited in claim 2, wherein: the fiber length range of the carbon fiber is 3-10 mm.
4. An in situ electro-thermally sterilizable air filtration material according to claim 3, wherein: the air filtering material capable of being electrically heated and killed in situ comprises: the components by weight percentage are 0-20% of auxiliary fiber, 80-100% of filter fiber and 0-5% of adhesive.
5. An in situ electro-thermally sterilizable air filtration material according to claim 4, wherein: the air filtering material capable of being electrically heated and sterilized in situ comprises: the following components by weight percent are auxiliary fiber 10%, filter fiber 87% and adhesive 3%.
6. An in situ electro-thermally sterilizable air filter material as claimed in any of claims 1 to 5, wherein: the air filter material capable of being electrically heated and killed in situ also comprises an auxiliary agent.
7. An in situ electro-thermally sterilizable air filtration material as recited in claim 6, wherein: the auxiliary agent is tributyl phosphate, and the content of the auxiliary agent is 0.1-0.5% by weight.
8. A method of preparing an in situ electro-thermally sterilizable air filtration material according to any of claims 1 to 7, comprising: the preparation method of the in-situ electrothermal sterilizing air filtering material comprises the following steps:
pulping, namely preparing auxiliary fibers and filter fibers into pulp;
the preparation is that the adhesive is diluted into adhesive dispersion liquid by deionized water;
forming, namely forming the obtained slurry, then vacuumizing, and spraying adhesive dispersion liquid to the surface of the formed filter material base layer in a vacuumizing state;
drying, and drying the formed filter paper to obtain the finished product of the filter material.
9. A filtration apparatus, characterized by: the filter device comprises an in situ electro-thermally sterilizable air filter material according to any of claims 1 to 7.
10. An air filter element that can normal position electric heat kill, its characterized in that: the in situ electro-thermally sterilizable air filter element comprising an in situ electro-thermally sterilizable air filter material according to any of claims 1 to 7.
CN202010697668.1A 2020-07-20 2020-07-20 Air filtering material capable of being sterilized by electric heating in situ and preparation method thereof Active CN111773823B (en)

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WO1994007588A1 (en) * 1992-09-25 1994-04-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Heat-resistant filter
JPH1089050A (en) * 1996-09-11 1998-04-07 Nhk Spring Co Ltd Filter device for exhaust gas
JP2003033612A (en) * 2001-07-25 2003-02-04 Mitsubishi Heavy Ind Ltd Filter for inactivating allergen and air conditioner
JP4035578B2 (en) * 2002-03-29 2008-01-23 株式会社エス・アンド・エスホールディングス Particulate filter for diesel engine
CN101816856A (en) * 2009-02-27 2010-09-01 新东工业株式会社 Antistatic filtering cloth in surface filtering mode for dust collector
KR101103568B1 (en) * 2011-05-19 2012-01-09 주식회사 엠아이텍 Cooling tower having functions of anti-microbial and decreasing noise
US20140217013A1 (en) * 2011-09-09 2014-08-07 Asahi Kasei Fibers Corporation Polyketone porous film
CN109556207A (en) * 2018-11-30 2019-04-02 厦门三维丝环保股份有限公司 A kind of air purifier of high temperature sterilization

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994007588A1 (en) * 1992-09-25 1994-04-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Heat-resistant filter
JPH1089050A (en) * 1996-09-11 1998-04-07 Nhk Spring Co Ltd Filter device for exhaust gas
JP2003033612A (en) * 2001-07-25 2003-02-04 Mitsubishi Heavy Ind Ltd Filter for inactivating allergen and air conditioner
JP4035578B2 (en) * 2002-03-29 2008-01-23 株式会社エス・アンド・エスホールディングス Particulate filter for diesel engine
CN101816856A (en) * 2009-02-27 2010-09-01 新东工业株式会社 Antistatic filtering cloth in surface filtering mode for dust collector
KR101103568B1 (en) * 2011-05-19 2012-01-09 주식회사 엠아이텍 Cooling tower having functions of anti-microbial and decreasing noise
US20140217013A1 (en) * 2011-09-09 2014-08-07 Asahi Kasei Fibers Corporation Polyketone porous film
CN109556207A (en) * 2018-11-30 2019-04-02 厦门三维丝环保股份有限公司 A kind of air purifier of high temperature sterilization

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