CN116688648A - Composite needled filter material and preparation method thereof - Google Patents

Composite needled filter material and preparation method thereof Download PDF

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Publication number
CN116688648A
CN116688648A CN202310283748.6A CN202310283748A CN116688648A CN 116688648 A CN116688648 A CN 116688648A CN 202310283748 A CN202310283748 A CN 202310283748A CN 116688648 A CN116688648 A CN 116688648A
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CN
China
Prior art keywords
filter material
polytetrafluoroethylene
warp
base cloth
cloth layer
Prior art date
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Pending
Application number
CN202310283748.6A
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Chinese (zh)
Inventor
朱靓靓
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Jiangsu Lyudi Environmental Filtering Material Co ltd
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Jiangsu Lyudi Environmental Filtering Material Co ltd
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Application filed by Jiangsu Lyudi Environmental Filtering Material Co ltd filed Critical Jiangsu Lyudi Environmental Filtering Material Co ltd
Priority to CN202310283748.6A priority Critical patent/CN116688648A/en
Publication of CN116688648A publication Critical patent/CN116688648A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • 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
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • 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
    • B32B5/026—Knitted fabric
    • 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
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/533—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads antistatic; electrically conductive
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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

Abstract

The invention relates to a composite needled filter material and a preparation method thereof, wherein the high-strength filter material comprises a base cloth layer, the base cloth layer comprises a plurality of warps and wefts which are mutually overlapped, first locking wires are arranged between the warps and the wefts in a crossed winding manner, second locking wires are arranged between two adjacent groups of first locking wires in a crossed winding manner, the warps and the wefts comprise base wires, two groups of reinforcing wires are reversely and alternately wound on the outer side of the base wires, a silk screen layer is arranged on the inner side of the base cloth layer, polytetrafluoroethylene impregnation treatment layers are arranged on the inner side of the silk screen layer and the outer side of the base cloth layer, and polytetrafluoroethylene coatings and polytetrafluoroethylene microporous films are sequentially arranged on the inner side of the inner side polytetrafluoroethylene impregnation treatment layers, so that the strength and the service performance of the filter material are integrally enhanced; the preparation of the filter material is realized by winding, braiding, dipping, coating, hot pressing and the like, so that the service performance of the filter material is improved.

Description

Composite needled filter material and preparation method thereof
Technical Field
The invention relates to the technical field of filter materials, in particular to a composite needled filter material and a preparation method thereof.
Background
Needled filter materials are widely used in daily life and industrial production for filtering liquids, gases or solids.
The base cloth layer structure of traditional acupuncture filter material is single, mainly through warp and weft alternately weave formation, lack corresponding locking structure between warp and the weft, make the filter material use in-process, along with the expansion of base cloth atress, lead to the condition that warp or weft run easily, lead to the intensity of base cloth lower, shock resistance is relatively poor, and the warp and weft that current filter material base cloth adopted are mostly single yarn, intensity is lower, when realizing the filtration of gas or liquid etc. produce the fracture under the effect of wind-force and liquid impact force easily, thereby lead to the filter material to wholly appear splitting, cause invalid filterable condition, and current filter material base cloth produces deformation along with the direction of impact force easily, make the base cloth atress gather easily, cause the condition of tearing.
Disclosure of Invention
The invention aims to provide a composite needled filter material and a preparation method thereof, which are used for solving the problems that the needled filter material in the prior art provided in the background art is low in strength and easy to break or crack.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a compound acupuncture filter material, includes the base cloth layer, the base cloth layer includes warp and weft that a plurality of mutual warp latitude are folded, cross winding is provided with first locking line between warp and the weft, and cross winding is provided with the second locking line between two adjacent first locking lines, warp and weft all include the baseline, the outside reverse cross winding of baseline has two sets of enhancement lines, the inboard of base cloth layer is provided with the silk screen layer, the inboard of silk screen layer and the outside of base cloth layer all are provided with polytetrafluoroethylene impregnation treatment layer, inboard polytetrafluoroethylene coating and polytetrafluoroethylene microporous membrane have been set gradually to polytetrafluoroethylene impregnation treatment layer's inboard.
As a further scheme of the invention: conductive fibers are inserted between the warp yarns and the weft yarns, and the antistatic performance of the base fabric is enhanced.
As still further aspects of the invention: the conductive fibers are carbon fibers or metal fibers.
As still further aspects of the invention: the polytetrafluoroethylene coating and the polytetrafluoroethylene microporous membrane are covered by a high-temperature hot-pressing mode.
A preparation method of a composite needled filter material comprises the following steps:
A. manufacturing warp and weft:
and (3) taking one high-strength fiber yarn as a base line, taking the other two high-strength fiber yarns with the diameters smaller than or equal to the base line as reinforcing wires, and reversely spirally winding the two reinforcing wires on the outer side of the base line through a winding machine to form standby warps and wefts.
B. Weaving a base cloth layer:
warp and weft are woven through a braiding machine, meanwhile, first locking wires are alternately wound between the warp and a plurality of corresponding weft wires in a penetrating mode, second locking wires are alternately wound between two adjacent groups of first locking wires in a penetrating mode, and a base cloth layer is formed through cooperation of the warp, the weft, the first locking wires and the second locking wires, wherein part of warp can be replaced by conductive fibers.
C. And C, covering the inner side of the base cloth layer formed in the step B with a silk screen layer by sewing or gluing.
D. And C, sequentially carrying out finishing processing such as dipping treatment, desizing treatment, volatilizing treatment, drying treatment, heat setting and the like on the filter material structure formed in the step C, so that a polytetrafluoroethylene dipping treatment layer is formed on the inner side of the silk screen layer and the outer side of the base cloth layer.
E. And D, on the basis of the step D, introducing the whole body into a coating machine for coating processing, and coating the surface of the filter material formed in the step D with pre-prepared polytetrafluoroethylene resin to form a polytetrafluoroethylene coating.
F. And (2) simultaneously introducing the filter material formed in the step (E) and the polytetrafluoroethylene microporous membrane into a laminating machine, carrying out surface lamination on the polytetrafluoroethylene microporous membrane, and combining the polytetrafluoroethylene microporous membrane and the filter material formed in the step (E) together in a high-temperature hot-pressing mode to form the high-strength filter material of claim 1.
As still further aspects of the invention: the polytetrafluoroethylene coating has a coating thickness of 100 mu m, a speed of 2m/min and a sintering temperature of 200 ℃.
As still further aspects of the invention: when the polytetrafluoroethylene microporous membrane is coated, the coating temperature is 200 ℃, the pressure is 0.3MPa, and the running speed is 3m/min.
As still further aspects of the invention: the general slurry amount of the polytetrafluoroethylene impregnation treatment layer is controlled to be 10% in the impregnation treatment process, the volatilization treatment temperature is 99 ℃, the drying temperature is 130 ℃, and the heat setting temperature is 180 ℃.
As still further aspects of the invention: the total content of conductive fibers replacing the warp threads is < 10%.
Compared with the prior art, the invention has the advantages that:
1. the invention comprises a base cloth layer, wherein the base cloth layer comprises a plurality of warps and wefts which are overlapped with each other, first locking wires are arranged between the warps and the wefts in a cross winding manner, the warps and the wefts with poor intersection can be locked and fixed through the first locking wires, and the connection strength and the connection stability between the warps and the corresponding wefts are improved, so that the integral strength of the filter material is enhanced, the condition of breakage in the use process is avoided, second locking wires are arranged between two adjacent groups of first locking wires in a cross winding manner, and the adjacent first locking wires can be wound and locked through the second locking wires, so that the connection strength between the two adjacent groups of first locking wires can be enhanced, and the integral strength of the filter material is further enhanced.
2. The warp and the weft all comprise a base line, two groups of reinforcing wires are reversely wound on the outer side of the base line in a crossing manner, and the toughness of the base line can be enhanced by winding the reinforcing wires on the outer side of the base line, so that the toughness of the warp and the weft is enhanced.
3. According to the invention, the silk screen layer is arranged on the inner side of the base cloth layer, and the expansion force of the base cloth layer under the stress can be limited through the arrangement of the silk screen layer, so that the condition that the base cloth layer is broken due to excessive expansion of the base cloth layer is avoided, and the strength of the filter material in use is further improved.
4. According to the invention, the conductive fibers are inserted between the warp and the weft, so that part of warp can be replaced by the conductive fibers, the conductivity of the base cloth layer can be enhanced, and static electricity generated in the using process is avoided, wherein the conductive fibers are preferably metal fibers or carbon fibers, so that the base cloth layer has antistatic performance on the whole, and the collection of fine dust and the ash removal of filter materials are facilitated.
5. The invention increases the strength from the initial warp and weft, and increases the locking property in the weaving process of the warp and weft, thereby fundamentally realizing the increase of the strength of the filter material, improving the service performance and the service life of the filter material.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a composite needled filter material and a method for preparing the same;
FIG. 2 is an exploded view of the overall structure of a composite needled filter material and a method of making the same according to the present invention;
FIG. 3 is a schematic view of the overall structure of the base fabric of the present invention;
fig. 4 is a schematic view showing the overall structure of warp and weft in the present invention.
In the figure: 1. a base cloth layer; 2. warp threads; 3. a weft thread; 4. a first locking wire; 5. a second locking wire; 6. a base line; 7. a reinforcing wire; 8. a silk screen layer; 9. a polytetrafluoroethylene impregnation treatment layer; 10. a polytetrafluoroethylene coating; 11. a polytetrafluoroethylene microporous membrane; 12. conductive fibers.
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.
Example 1:
referring to fig. 1 to 4, in an embodiment of the present invention:
the utility model provides a compound acupuncture filter material, including base cloth layer 1, base cloth layer 1 includes warp 2 and weft 3 that a plurality of mutual warps are overlapped, cross winding is provided with first locking line 4 between warp 2 and the weft 3, can lock fixedly between warp 2 and the weft 3 that intersects through first locking line 4, improve the joint strength and the connection stability between warp 2 and the corresponding weft 3, thereby strengthen the holistic intensity of filter material, avoid the circumstances that breaks appear in the use, cross winding is provided with second locking line 5 between two adjacent first locking lines 4, can twine the locking between two adjacent first locking lines 4 through second locking line 5, can strengthen the joint strength between two adjacent first locking lines 4 like this, and then further strengthen the holistic intensity of filter material;
the warp threads 2 and the weft threads 3 comprise a base line 6, two groups of reinforcing threads 7 are reversely and crosswise wound on the outer side of the base line 6, the toughness of the base line 6 can be enhanced by winding the reinforcing threads 7 on the outer side of the base line 6, so that the toughness of the warp threads 2 and the weft threads 3 is enhanced, meanwhile, the stability of winding the reinforcing threads 7 on the outer side of the base line 6 can be improved by reversely and spirally winding the two groups of reinforcing threads 7 on the outer side of the base line 6, the phenomenon of loosening is avoided when the base line 6 is screwed, and the integral strength of the warp threads 2 and the weft threads 3 formed by matching the base line 6 with the reinforcing threads 7 is improved;
the inner side of the base cloth layer 1 is provided with the silk screen layer 8, and the expansion force of the base cloth layer 1 when being stressed can be limited by the arrangement of the silk screen layer 8, so that the condition that the base cloth layer 1 is broken due to excessive expansion of the base cloth layer 1 is avoided, and the strength of the filter material when in use is further improved;
in the invention, the conductive fibers 12 are inserted between the warp 2 and the weft 3, and part of the warp 2 can be replaced by the conductive fibers 12, so that the conductivity of the base cloth layer 1 can be enhanced, and static electricity is avoided in the use process, wherein the conductive fibers 12 are preferably metal fibers or carbon fibers, so that the base cloth layer 1 has antistatic performance on the whole, and the collection of fine dust and the ash removal of filter materials are facilitated.
Example 2:
referring to fig. 1 to 4, on the basis of embodiment 1, polytetrafluoroethylene impregnation treatment layers 9 are respectively arranged on the inner side of a silk screen layer 8 and the outer side of a base cloth layer 1, so that tensile strength, temperature resistance, corrosion resistance, dimensional stability and other performance indexes of a product can be improved, service life is better met, polytetrafluoroethylene coating 10 and polytetrafluoroethylene microporous membrane 11 are sequentially arranged on the inner side of the inner polytetrafluoroethylene impregnation treatment layer 9, polytetrafluoroethylene coating 10 is used for coating pre-prepared polytetrafluoroethylene resin on the surface of polytetrafluoroethylene impregnation treatment layer 9 by adopting a coating process, filtering and deashing performance of the base cloth layer 1 can be improved by processing the polytetrafluoroethylene coating 10, a foundation is made for subsequent film coating processing of the polytetrafluoroethylene microporous membrane 11, then the polytetrafluoroethylene microporous membrane 11 is compounded on the surface of the polytetrafluoroethylene coating 10 by adopting a hot-pressing process, conversion from deep filtration to surface filtration is realized, dust is effectively prevented from being deposited in an acrylic filter material, running resistance during system filtration is reduced, deashing pressure is low, and the number of times is low, and compressed air consumption during deashing is reduced;
meanwhile, the polytetrafluoroethylene microporous membrane 11 is covered on the surface of the base cloth layer 1, so that the dust stripping rate is high, the filter material is light, thin and soft, and the shaking is good during ash removal.
Example 3:
the invention relates to a preparation method of a composite needled filter material, which comprises the following steps:
A. manufacturing warp yarn 2 and weft yarn 3:
the high-strength fiber yarn is adopted as a base line 6, the high-strength fiber yarn is prepared by a preparation method of a high-temperature-resistant high-strength bag type dust-collecting filter material fiber disclosed in China patent document with publication number of CN109097853B, then another two strands of high-strength fiber yarn with the diameter smaller than or equal to the base line 6 are adopted as reinforcing wires 7, and the two strands of reinforcing wires 7 are reversely spirally wound on the outer side of the base line 6 through a winding machine to form standby warps 2 and wefts 3, so that the strength of the single-strand warps 2 and the single-strand wefts 3 can be enhanced, and the strength of base cloth manufactured by the warps 2 and the wefts 3 is increased.
B. Weaving of the base fabric layer 1:
the warp 2 and the weft 3 are woven through the braiding machine, meanwhile, the first locking wires 4 are alternately wound between the warp 2 and the corresponding plurality of weft 3, the cross winding firmness between the warp 2 and the weft 3 can be enhanced through the first locking wires 4, the condition of wire running is avoided, the strength and the stability of the base cloth layer 1 are improved, the second locking wires 5 are alternately wound between two adjacent groups of the first locking wires 4 in a crossing manner, the base cloth layer 1 is formed through the cooperation of the warp 2, the weft 3, the first locking wires 4 and the second locking wires 5, the adjacent two groups of the first locking wires 4 can be connected through the second locking wires 5, and therefore the connection stability between the warp 2 and the weft 3 is further improved, the base cloth layer 1 has higher strength, part of the warp 2 can be replaced by conductive fibers 12, the base cloth layer 1 has antistatic performance on the whole, and dust collection and dust removal are facilitated.
K. And C, covering the inner side of the base cloth layer 1 formed in the step B with the silk screen layer 8 in a sewing or gluing mode, wherein the silk screen layer 8 can limit the expansion of the base cloth layer 1 when being stressed, so that the condition that the base cloth layer 1 is broken due to overlarge tension is avoided, and the overall use strength of the filter material is improved.
And L, sequentially carrying out finishing processing such as dipping treatment, desizing treatment, volatilizing treatment, drying treatment, heat setting and the like on the filter material structure formed in the step C, so that a polytetrafluoroethylene dipping treatment layer 9 is formed on the inner side of the silk screen layer 8 and the outer side of the base cloth layer 1, wherein the total sizing amount is controlled to be 10% in the dipping treatment process, the volatilizing treatment temperature is 99 ℃, the drying temperature is 130 ℃, and the heat setting temperature is 180 ℃.
And (D) on the basis of the step (D), introducing the whole filter material into a coating machine for coating processing, and coating the surface of the filter material formed in the step (D) with pre-prepared polytetrafluoroethylene resin to form a polytetrafluoroethylene coating 10, wherein the thickness of the coating is 100 mu M, the speed is 2M/min, the sintering temperature is 200 ℃, and the whole filter material filtering and ash removing performance is improved through the coating processing, so that the basis is provided for subsequent film coating processing.
And N, then, introducing the filter material formed in the step E and the polytetrafluoroethylene microporous membrane 11 into a laminating machine at the same time, carrying out surface lamination on the polytetrafluoroethylene microporous membrane 11, and combining the polytetrafluoroethylene microporous membrane 11 and the filter material formed in the step E together in a high-temperature hot-pressing mode to form the high-strength filter material in the claim 1, wherein the laminating temperature is 200 ℃, the pressure is 0.3MPa, and the running speed is 3m/min. The integral filtering and ash removing performance of the filter material can be improved through the film coating processing, and the conversion from deep filtration to surface filtration is realized.
In all the above mentioned embodiments, the welding, the matching connection of the bolt and the nut, the bolt or the screw connection or other known connection modes can be selected according to the actual situation, and are not described in detail herein, the above description refers to the write-in fixed connection, and the welding is preferentially considered, but the protection scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the protection scope of the present invention if the technical scheme and the inventive concept thereof are equivalent or changed within the scope of the present invention.

Claims (10)

1. The utility model provides a compound acupuncture filter material, includes base cloth layer (1), base cloth layer (1) include warp (2) and weft (3) that a plurality of mutual longitude and latitude fold cross, its characterized in that: the warp (2) and weft (3) cross winding is provided with first locking line (4), and two adjacent groups cross winding is provided with second locking line (5) between first locking line (4), warp (2) and weft (3) all include baseline (6), the outside reverse cross winding of baseline (6) has two sets of stiffening wire (7), the inboard of base cloth layer (1) is provided with silk screen layer (8), the inboard of silk screen layer (8) and the outside of base cloth layer (1) all are provided with polytetrafluoroethylene impregnation treatment layer (9), inboard polytetrafluoroethylene coating (10) and polytetrafluoroethylene micropore film (11) have been set gradually to the inboard of polytetrafluoroethylene impregnation treatment layer (9).
2. The composite needled filter material of claim 1, wherein: conductive fibers (12) are arranged between the warp (2) and the weft (3) in a penetrating mode.
3. A composite needled filter material as in claim 2, in which: the conductive fibers (12) are carbon fibers.
4. A composite needled filter material as in claim 2, in which: the conductive fibers (12) are metal fibers.
5. The composite needled filter material of claim 1, wherein: the polytetrafluoroethylene coating (10) and the polytetrafluoroethylene microporous membrane (11) are covered by a high-temperature hot-pressing mode.
6. A method for preparing a high strength filter material as claimed in claims 1-2, comprising the steps of:
A. manufacturing warp (2) and weft (3):
and (3) taking one high-strength fiber yarn as a base line (6), and taking the other two high-strength fiber yarns with the diameters smaller than or equal to the base line (6) as reinforcing wires (7), and reversely spirally winding the two reinforcing wires (7) on the outer side of the base line (6) through a winding machine to form standby warps (2) and wefts (3).
B. Weaving of the base cloth layer (1):
warp knitting is carried out on the warp (2) and the weft (3) through a knitting machine, meanwhile, the first locking wires (4) are alternately wound between the warp (2) and the corresponding plurality of weft (3) in a penetrating and winding mode, the second locking wires (5) are alternately wound between two adjacent groups of the first locking wires (4) in a penetrating and winding mode, and the base cloth layer (1) is formed through cooperation of the warp (2), the weft (3), the first locking wires (4) and the second locking wires (5), wherein part of the warp (2) can be replaced by conductive fibers (12).
C. And (c) covering the inner side of the base cloth layer (1) formed in the step (B) with a silk screen layer (8) by sewing or gluing.
D. And (C) sequentially carrying out finishing processing such as dipping treatment, desizing treatment, volatilizing treatment, drying treatment, heat setting and the like on the filter material structure formed in the step (C) so as to form a polytetrafluoroethylene dipping treatment layer (9) on the inner side of the silk screen layer (8) and the outer side of the base cloth layer (1).
E. And (2) on the basis of the step (D), introducing the whole body into a coating machine for coating, and coating the surface of the filter material formed in the step (D) with pre-prepared polytetrafluoroethylene resin to form a polytetrafluoroethylene coating (10).
F. And (2) simultaneously introducing the filter material formed in the step (E) and the polytetrafluoroethylene microporous membrane (11) into a laminating machine, carrying out surface lamination on the polytetrafluoroethylene microporous membrane (11), and combining the polytetrafluoroethylene microporous membrane (11) and the filter material formed in the step (E) together in a high-temperature hot-pressing mode to form the high-strength filter material of claim 1.
7. The method for preparing the composite needled filter material of claim 6, wherein the method comprises the following steps: the polytetrafluoroethylene coating (10) has a coating thickness of 100 mu m, a speed of 2m/min and a sintering temperature of 200 ℃.
8. The composite needled filter material and the preparation method thereof according to claim 6, wherein the composite needled filter material is characterized in that: when the polytetrafluoroethylene microporous membrane (11) is coated, the coating temperature is 200 ℃, the pressure is 0.3MPa, and the running speed is 3m/min.
9. The composite needled filter material and the preparation method thereof according to claim 6, wherein the composite needled filter material is characterized in that: the general slurry amount of the polytetrafluoroethylene impregnation treatment layer (9) is controlled to be 10 percent in the impregnation treatment process, the volatilization treatment temperature is 99 ℃, the drying temperature is 130 ℃, and the heat setting temperature is 180 ℃.
10. The composite needled filter material and the preparation method thereof according to claim 6, wherein the composite needled filter material is characterized in that: the total content of conductive fibers (12) replacing the warp threads (2) is < 10%.
CN202310283748.6A 2023-03-22 2023-03-22 Composite needled filter material and preparation method thereof Pending CN116688648A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117225081A (en) * 2023-09-15 2023-12-15 广东新力新材料有限公司 Film-covered metal fiber felt
CN117225081B (en) * 2023-09-15 2024-05-17 广东新力新材料有限公司 Film-covered metal fiber felt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117225081A (en) * 2023-09-15 2023-12-15 广东新力新材料有限公司 Film-covered metal fiber felt
CN117225081B (en) * 2023-09-15 2024-05-17 广东新力新材料有限公司 Film-covered metal fiber felt

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