CN112246020A - Preparation method of low-resistance surface filter material - Google Patents
Preparation method of low-resistance surface filter material Download PDFInfo
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- CN112246020A CN112246020A CN202011068756.1A CN202011068756A CN112246020A CN 112246020 A CN112246020 A CN 112246020A CN 202011068756 A CN202011068756 A CN 202011068756A CN 112246020 A CN112246020 A CN 112246020A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0223—Vinyl resin fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
Abstract
The invention provides a preparation method of a low-resistance surface filter material, and particularly relates to the field of filter materials, which comprises the following steps: s1, preparing a nonwoven fiber felt material with a gram weight of 10-100g/m2 nanometer by using the polymer solution or the melt through an electrostatic spinning method; s2, adding the high-performance fibers into the base cloth after opening, mixing, carding, lapping and grid connection, and carrying out needling or spunlacing to obtain the fiber with the total gram weight of 200-800g/m2Filtering a plain felt; and S3, adhering the nano non-woven fiber felt material to the surface of the filtering material plain felt in a hot melting compounding mode to obtain the filtering material with the gradient structure of the surface compact nano fiber layer. The product prepared by the invention can realize high-efficiency surface interception of fine dust, improve the interception efficiency of filter materials to the ultrafine dust in the working condition operation process, realize surface filtration and reduce the operation resistance.
Description
Technical Field
The invention belongs to the field of filter materials, and particularly relates to a preparation method of a low-resistance surface filter material.
Background
Along with the stricter environmental protection treatment of the country, people pay more attention to and pay more attention to the comprehensive treatment technology of industrial smoke pollution. The bag type dust removal technology has the advantages of high filtration efficiency, long service life and the like, and is more and more widely applied to the field of industrial smoke dust treatment. The filter material is used as a 'heart' of bag type dust removal, and the performance quality of the filter material determines the running stability of the whole system and whether the requirement of ultra-low dust emission can be met. Therefore, with the lower and lower smoke emission standards in various industries, higher requirements are put forward on the performance of the filter material when the ultra-low emission of dust in iron and steel smelting, waste incineration, coal-fired power plants, cement, chemical industry and the like is comprehensively treated.
The prior art mainly adopts the method that superfine fibers (the diameter of the conventional fibers is 13-16 mu m, and the diameter of the superfine fibers is 5-8 mu m) are mixed in a filter material fiber layer or a layer of PTFE film with the thickness of 2-3 mu m is pasted on the surface of the filter material, but the superfine dust is not high in interception efficiency in the actual working condition operation due to the reason that the diameter of the fibers is larger and the film is easy to damage and the like;
in view of the above disadvantages, there is a need for a method for preparing a low-resistance surface filter material, which can realize efficient surface interception of fine dust, improve the interception efficiency of the filter material on ultrafine dust during working condition operation, and reduce the operation resistance while realizing surface filtration.
Disclosure of Invention
The invention aims to provide a preparation method of a low-resistance surface filter material, which can realize high-efficiency surface interception of fine dust, improve the interception efficiency of the filter material to the ultrafine dust in the working condition operation process, realize surface filtration and reduce the operation resistance.
The invention provides the following technical scheme:
a preparation method of a low-resistance surface filter material comprises the following specific steps:
s1, preparing a nonwoven fiber felt material with a gram weight of 10-100g/m2 nanometer by using the polymer solution or the melt through an electrostatic spinning method;
s2, adding the high-performance fibers into the base cloth after opening, mixing, carding, lapping and grid connection, and carrying out needling or spunlacing to obtain the fiber with the total gram weight of 200-800g/m2Filtering a plain felt;
and S3, adhering the nano non-woven fiber felt material to the surface of the filtering material plain felt in a hot melting compounding mode to obtain the filtering material with the gradient structure of the surface compact nano fiber layer.
Preferably, the total gram weight of the base fabric is 50-110g/m2。
Preferably, the polymer solution or melt is in terylene, polyacrylonitrile, polyphenylene sulfide, aramid or polyimide.
Preferably, the high-performance fiber comprises polyester fiber or polyacrylonitrile fiber or polyphenylene sulfide fiber or aramid fiber or polytetrafluoroethylene fiber or polyimide fiber or glass fiber.
Preferably, the raw material of the base fabric comprises polyester fiber or polyacrylonitrile fiber or polyphenylene sulfide fiber or aramid fiber or polytetrafluoroethylene fiber or polyimide fiber or glass fiber.
Preferably, the temperature of the hot-pressing roller is 190-350 ℃, and the pressure is 0.2-0.6 MPa.
The invention has the beneficial effects that:
according to the method, a polymer solution or a melt is prepared into a non-woven fiber felt material with the gram weight of 10-100g/m2 nano through an electrostatic spinning method, and then the non-woven fiber felt material is attached to the surface of a non-woven needle felt or a needle felt with the gram weight of 200-2 g/m through a hot melting laminating method, so that a compact nanofiber layer is formed on the surface of a filter material, and therefore, the high-efficiency surface interception of fine dust is realized in the filtering process of the filter material, meanwhile, the air permeability of a filter material body is not reduced, and the low-resistance operation is kept. The method is suitable for the ultra-low emission smoke dust treatment of industrial kilns such as steel smelting, waste incineration, coal-fired power plants, cement, chemical engineering and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the lamination process of the present invention.
Labeled as: 1. filtering a plain felt; 2. a coating blade; 3. a nanofiber web; 4. and (4) covering an electric heating roller.
Detailed Description
Example 1:
firstly, preparing a terylene solution into a terylene non-woven fiber felt material with the gram weight of 100g/m2 nanometer by an electrostatic spinning method;
then adding the polyester fibers into the base cloth after opening, mixing, carding, lapping and grid connection, wherein the total gram weight of the base cloth is 110g/m2Needling or spunlacing to obtain the total gram weight of 800g/m2Filtering a plain felt;
finally, the nano polyester fiber felt material is attached to the surface of the filtering material plain felt in a hot melting compounding mode, the temperature of a hot pressing roller is 350 ℃, the pressure is 0.6MPa, and the total gram weight of the filtering material with the gradient structure of the surface compact nano fiber layer is 600g/m2。
Example 2:
firstly, preparing a terylene solution into a terylene non-woven fiber felt material with the gram weight of 50g/m2 nanometer by an electrostatic spinning method;
then adding the polyester fibers into the base cloth after opening, mixing, carding, lapping and grid connection, wherein the total gram weight of the base cloth is 80g/m2Needling or spunlacing to obtain the total gram weight of 450g/m2Filtering a plain felt;
finally, the nano polyester fiber felt material is attached to a filtering material plain felt surface in a hot melting compounding modeThe temperature of the hot-pressing roller is 220 ℃, and the pressure is 0.3MPa, so that the filter material with the surface compact nanofiber layer gradient structure is obtained, and the total gram weight is 500g/m2。
Example 3:
firstly, preparing a 10g/m2 gram weight nanometer terylene non-woven fiber felt material from a terylene solution by an electrostatic spinning method;
then adding the polyester fibers into the base cloth after opening, mixing, carding, lapping and grid connection, wherein the total gram weight of the base cloth is 50g/m2Needling or spunlacing to obtain the product with a total gram weight of 200g/m2Filtering a plain felt;
finally, the nano polyester fiber felt material is attached to the surface of the filtering material plain felt in a hot melting compounding mode, the temperature of a hot pressing roller is 190 ℃, the pressure is 0.2MPa, and the total gram weight of the filtering material with the gradient structure of the surface compact nano fiber layer is 400g/m2。
The performance tests performed on the products obtained in examples 1 to 3 were as follows:
example 1: the filter material is subjected to VDI filtering performance test, the interception efficiency of sol particles with the diameter of 0.3 mu m is 98.9 percent, the interception efficiency of the coated polyester filter material with the similar gram weight is 89.2 percent under the same test condition, and the interception efficiency of the surface blended superfine polyester fiber filter material is 79.3 percent.
Example 2: the filter material is subjected to VDI filtering performance test, the interception efficiency of sol particles with the diameter of 0.3 mu m is 99.9 percent, the interception efficiency of the coated polyester filter material with the similar gram weight is 90.3 percent under the same test condition, and the interception efficiency of the surface blended superfine polyester fiber filter material is 81.5 percent.
Example 3: the filter material is subjected to VDI filtering performance test, the interception efficiency of sol particles with the diameter of 0.3 mu m is 98.1 percent, the interception efficiency of the coated polyester filter material with the similar gram weight is 88.1 percent under the same test condition, and the interception efficiency of the surface blended superfine polyester fiber filter material is 77.3 percent.
According to the invention, a compact nanofiber layer is formed on the surface of the filter material, so that the high-efficiency surface interception of fine dust is realized in the filtering process of the filter material, meanwhile, the air permeability of the filter material body is not reduced, and the low-resistance operation is kept.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The preparation method of the low-resistance surface filter material is characterized by comprising the following specific steps of:
s1, preparing a nonwoven fiber felt material with a gram weight of 10-100g/m2 nanometer by using the polymer solution or the melt through an electrostatic spinning method;
s2, adding the high-performance fibers into the base cloth after opening, mixing, carding, lapping and grid connection, and carrying out needling or spunlacing to obtain the fiber with the total gram weight of 200-800g/m2Filtering a plain felt;
and S3, adhering the nano non-woven fiber felt material to the surface of the filtering material plain felt in a hot melting compounding mode to obtain the filtering material with the gradient structure of the surface compact nano fiber layer.
2. The method for preparing the low-resistance surface filter material according to claim 1, wherein the method comprises the following steps: the total gram weight of the base fabric is 50-110g/m2。
3. The method for preparing the low-resistance surface filter material according to claim 1, wherein the method comprises the following steps: the polymer solution or solution is in terylene, polyacrylonitrile, polyphenylene sulfide, aramid or polyimide.
4. The method for preparing the low-resistance surface filter material according to claim 1, wherein the method comprises the following steps: the high-performance fiber comprises polyester fiber or polyacrylonitrile fiber or polyphenylene sulfide fiber or aramid fiber or polytetrafluoroethylene fiber or polyimide fiber or glass fiber.
5. The method for preparing the low-resistance surface filter material according to claim 1, wherein the method comprises the following steps: the base cloth is made of polyester fibers, polyacrylonitrile fibers, polyphenylene sulfide fibers, aramid fibers, polytetrafluoroethylene fibers, polyimide fibers or glass fibers.
6. The method for preparing the low-resistance surface filter material according to claim 1, wherein the method comprises the following steps: the temperature of the hot-pressing roller is 190-350 ℃, and the pressure is 0.2-0.6 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011068756.1A CN112246020A (en) | 2020-09-30 | 2020-09-30 | Preparation method of low-resistance surface filter material |
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| CN202011068756.1A CN112246020A (en) | 2020-09-30 | 2020-09-30 | Preparation method of low-resistance surface filter material |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69534053D1 (en) * | 1994-03-31 | 2005-04-14 | Nittetsu Mining Co Ltd | Filter with chemical resistance, antistatic property and water vapor resistance and process for its preparation |
| CN101906701A (en) * | 2009-06-03 | 2010-12-08 | 厦门三维丝环保股份有限公司 | Method for producing needled and spunlaced composite nonwovens for filter materials |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN104971549A (en) * | 2015-06-24 | 2015-10-14 | 上海市凌桥环保设备厂有限公司 | Antistatic filtering material for filtering industrial fine particles and preparation method therefor |
| CN105148611A (en) * | 2015-07-21 | 2015-12-16 | 安徽省元琛环保科技有限公司 | Aramid fiber composite filter material with high filtration performance and preparation method thereof |
| CN106606904A (en) * | 2015-10-26 | 2017-05-03 | 南京际华三五二环保科技有限公司 | Preparation method for stitch gluing type flue gas filter bag |
| CN107224783A (en) * | 2017-06-20 | 2017-10-03 | 华南理工大学 | A kind of composite construction filter felt and its preparation method and application |
-
2020
- 2020-09-30 CN CN202011068756.1A patent/CN112246020A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69534053D1 (en) * | 1994-03-31 | 2005-04-14 | Nittetsu Mining Co Ltd | Filter with chemical resistance, antistatic property and water vapor resistance and process for its preparation |
| CN101906701A (en) * | 2009-06-03 | 2010-12-08 | 厦门三维丝环保股份有限公司 | Method for producing needled and spunlaced composite nonwovens for filter materials |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN104971549A (en) * | 2015-06-24 | 2015-10-14 | 上海市凌桥环保设备厂有限公司 | Antistatic filtering material for filtering industrial fine particles and preparation method therefor |
| CN105148611A (en) * | 2015-07-21 | 2015-12-16 | 安徽省元琛环保科技有限公司 | Aramid fiber composite filter material with high filtration performance and preparation method thereof |
| CN106606904A (en) * | 2015-10-26 | 2017-05-03 | 南京际华三五二环保科技有限公司 | Preparation method for stitch gluing type flue gas filter bag |
| CN107224783A (en) * | 2017-06-20 | 2017-10-03 | 华南理工大学 | A kind of composite construction filter felt and its preparation method and application |
Non-Patent Citations (2)
| Title |
|---|
| 李海山: "《实验动物环境学》", 30 April 2002, 云南科学技术出版社 * |
| 杨乐芳: "《纺织材料与检测 第2版》", 28 February 2018, 东华大学出版社 * |
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