CN112030547A - Manufacturing method of conductive shielding non-woven fabric - Google Patents
Manufacturing method of conductive shielding non-woven fabric Download PDFInfo
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- CN112030547A CN112030547A CN202010978577.5A CN202010978577A CN112030547A CN 112030547 A CN112030547 A CN 112030547A CN 202010978577 A CN202010978577 A CN 202010978577A CN 112030547 A CN112030547 A CN 112030547A
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- Prior art keywords
- woven fabric
- conductive shielding
- liquid crystal
- crystal polymer
- metal coating
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Classifications
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- 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
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
-
- 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
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a method for manufacturing a conductive shielding non-woven fabric, which comprises the following steps: firstly, heating and melting a liquid crystal polymer raw material, and then conveying the liquid crystal polymer raw material into a melt-blowing die; secondly, arranging a reticulate pattern conveying device below the melt-blown die head, spraying the liquid crystal polymer raw material through a nozzle of the hot-melting die head to form fibers, and enabling the fibers to fall on a conveying belt of the reticulate pattern conveying roller to form a melt-blown non-woven fabric base material; thirdly, forming a metal coating on the surface of the non-woven fabric substrate; fourthly, laminating the non-woven fabric base material with the metal coating through a pressure roller to form the conductive shielding non-woven fabric; the liquid crystal polymer adopts wholly aromatic polyester material. The conductive shielding non-woven fabric product produced by the method has higher high temperature resistance and excellent low dielectric constant performance, and is an ideal conductive shielding material for 5G communication and high-frequency-band communication.
Description
The technical field is as follows:
the invention relates to the technical field of manufacturing methods of electromagnetic shielding materials, in particular to a manufacturing method of a conductive shielding non-woven fabric.
Background art:
with the development of electronic products, especially communication electronic products, the applications of the electronic products are increasing, and due to the precise and complicated structure of electronic components, electromagnetic shielding materials are needed to be used in order to avoid electromagnetic interference in the electronic products. At present, the electromagnetic shielding material used in the traditional communication field is flexible conductive cloth, the flexible conductive cloth usually adopts polyester fiber cloth such as PET as a base material, and a metal plating layer is electroplated on the surface of the base material. The conductive cloth has the following defects:
1. the high temperature resistance is insufficient, and particularly, after the environmental temperature exceeds 200 ℃, the metal coating can be greatly shrunk to fall off;
2. the fireproof and flame-retardant performance is poor;
3. the air permeability and the permeability are poor;
4. the thickness is larger, the thickness of the current conductive cloth is generally between 0.018 mm and 0.022mm, and the total amount is also heavier, so that when the conductive cloth is secondarily compounded with other functional materials, the thickness and the weight of a product are overlarge, and the secondary compounding with other functional materials is not facilitated;
in view of the above problems, the present inventors have proposed the following technical solutions.
The invention content is as follows:
the technical problem to be solved by the invention is to overcome the defects of the existing products and provide a method for manufacturing a conductive shielding non-woven fabric.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for manufacturing a conductive shielding non-woven fabric, wherein the conductive shielding non-woven fabric is manufactured by adopting liquid crystal polymer and is formed by forming a non-woven fabric base material in a melt-blowing mode and forming a metal coating on the surface of the non-woven fabric base material, and the manufacturing method comprises the following steps:
firstly, heating and melting a liquid crystal polymer raw material, and then conveying the liquid crystal polymer raw material into a melt-blowing die;
secondly, arranging a reticulate pattern conveying device below the melt-blowing die head, spraying liquid crystal polymer raw materials through a nozzle of the hot melting die head to form fibers, and enabling the fibers to fall on a conveying belt of the reticulate pattern conveying roller to form a melt-blown non-woven fabric base material, wherein the thickness of the formed non-woven fabric base material is 0.010-0.015 mm;
thirdly, forming a metal coating on the surface of the non-woven fabric substrate, wherein the thickness of the non-woven fabric substrate with the metal coating is 0.011-0.017 mm;
fourthly, the non-woven fabric base material with the metal coating is pressed through a pressure roller, the thickness of the non-woven fabric base material with the metal coating is changed into 0.010-0.015mm under the action of the pressure roller, and the conductive shielding non-woven fabric is formed;
the liquid crystal polymer adopts wholly aromatic polyester material.
Further, in the above technical solution, the liquid crystal polymer raw material is heated and melted by a screw extruder and then conveyed to a melt-blowing die.
Further, in the above technical solution, the diameter of the fiber formed in the second step is 0.001-0.005 mm.
Further, in the above technical solution, the density of the conductive shielding non-woven fabric is: the weight of each square centimeter is 0.29-0.38 g.
Further, in the above technical solution, the air transmittance of the conductive shielding non-woven fabric is: air transmission per square centimeter per second is: 150-.
Further, in the above technical solution, the non-woven fabric substrate is formed with a metal plating layer on its surface by a composite plating method of vacuum plating and electroplating.
Further, in the above technical solution, the metal plating layer adopts any one or combination of copper and nickel.
After the technical scheme is adopted, firstly, the base material of the conductive shielding non-woven fabric produced by the method adopts wholly aromatic polyester, and the melting point temperature of the liquid crystal phase of the non-woven fabric is generally more than 300 ℃, so that the non-woven fabric made of the material has high-temperature resistance. And secondly, after the metal coating is formed on the conductive shielding non-woven fabric, the conductive shielding non-woven fabric is rolled by a pressure roller, so that the thickness of the whole product can be further reduced, the weight of the product is further reduced, and the conductive shielding non-woven fabric is further compounded with other functional products, so that the conductive shielding non-woven fabric with the compounding performance is formed. The conductive shielding nonwoven fabric of the present invention has excellent low dielectric constant performance, and is an ideal conductive shielding material for 5G communication and high-frequency communication.
The specific implementation mode is as follows:
the invention relates to a method for manufacturing a conductive shielding non-woven fabric, which adopts liquid crystal polymer to manufacture and forms a non-woven fabric base material in a melt-blown mode, and forms a metal coating on the surface of the non-woven fabric base material, and the method comprises the following steps:
firstly, heating and melting a liquid crystal polymer raw material, and then conveying the liquid crystal polymer raw material into a melt-blowing die. The liquid crystal polymer material is a wholly aromatic polyester material, for example, a wholly aromatic polyester produced from 4-hydroxybenzoic acid, terephthalic acid, and 4, 4-dihydroxybenzene. The melting point temperature of the wholly aromatic polyester liquid crystal phase can reach 400 ℃, so that the non-woven fabric made of the material has high-temperature resistance.
And secondly, arranging a reticulate pattern conveying device below the melt-blowing die head, spraying the liquid crystal polymer raw material through a nozzle of the hot melting die head to form fibers, and dropping the fibers on a conveying belt of the reticulate pattern conveying roller to form a melt-blown non-woven fabric base material, wherein the thickness of the formed non-woven fabric base material is 0.010-0.015 mm. In the step, melt-blown fabric equipment can be directly adopted for production, and the material subjected to heat fusion is conveyed to a melt-blown die through a screw extruder. And the molten material is sprayed out through a nozzle of the hot melting die head to form fiber filaments, and the fiber filaments fall onto the reticulate pattern conveying roller below the fiber filaments and are cooled and solidified to form the fibrous non-woven fabric base material. The diameter of the nozzle of the hot-melt die head and the spraying speed are adjusted so that the diameter of the fiber reaches 0.001-0.005 mm. Finally obtaining the non-woven fabric substrate with the thickness of 0.010-0.015 mm.
And thirdly, forming a metal coating on the surface of the non-woven fabric substrate, wherein the thickness of the non-woven fabric substrate with the metal coating is 0.011-0.017 mm. In order to ensure the uniformity of the metal coating, the metal coating is formed on the surface of the non-woven fabric substrate in a composite coating mode of vacuum plating and electroplating. The non-woven fabric substrate is firstly subjected to vacuum evaporation and then is electroplated by an electrolyte. The metal plating layer formed in this way has firm and compact adhesion, and can greatly improve the conductivity of the product. The metal coating adopts any one or combination of copper and nickel. Or other metallic materials with excellent conductive properties.
And fourthly, laminating the non-woven fabric substrate with the metal coating through a pressure roller, wherein the thickness of the non-woven fabric substrate with the metal coating is 0.010-0.015mm under the action of the pressure roller, and forming the conductive shielding non-woven fabric.
The first embodiment is as follows:
the final thickness of the conductive shielding non-woven fabric manufactured by the method after being pressed by a pressure roller is 0.01mm, and the corresponding characteristics are shown in the following table.
When the first embodiment is subjected to a high temperature resistance test, the final conductive shielding non-woven fabric finished product can resist the temperature of 300 ℃ due to the higher melting point of the base material of the non-woven fabric, has higher heat resistance, and can be applied to equipment or products with higher environmental temperature.
When the high temperature shrinkage test was performed on the first embodiment, the first embodiment hardly shrinks in an environment at 220 ℃. In the environment of 220-260 ℃, the shrinkage rate of the first embodiment is below 1 percent.
For the water absorption and water deformation resistance test of the present example, when the first example is soaked in water for 100 hours, the first example hardly absorbs water, and the conductivity is not changed, and the product is maintained without any deformation.
Example two:
the final thickness of the conductive shielding non-woven fabric manufactured by the method after being pressed by a pressure roller is 0.015mm, and the corresponding characteristics are shown in the following table.
The following table shows the relevant production parameter tests for examples one and two
The results comparing example one with a conventional PET conductive cloth are as follows:
the first example and the common PET conductive cloth are subjected to chemical resistance tests, and the first example has far higher chemical resistance than the conventional PET conductive cloth, such as sulfuric acid, nitric acid, acetic acid, sodium hydroxide, benzene, methanol and the like.
In conclusion, compared with the common conductive fabric, the thickness and the weight of the conductive shielding non-woven fabric produced by the invention can be further reduced, and the conductive shielding non-woven fabric can be conveniently further compounded with other functional products, so that the conductive shielding non-woven fabric with the compounding performance is formed. The conductive shielding nonwoven fabric of the present invention has excellent low dielectric constant performance, and is an ideal conductive shielding material for 5G communication and high-frequency communication.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (7)
1. A method for manufacturing a conductive shielding non-woven fabric is characterized in that a non-woven fabric base material is formed by adopting liquid crystal polymer through a melt-blowing mode, and a metal coating film is formed on the surface of the non-woven fabric base material, and the method comprises the following steps:
firstly, heating and melting a liquid crystal polymer raw material, and then conveying the liquid crystal polymer raw material into a melt-blowing die;
secondly, arranging a reticulate pattern conveying device below the melt-blowing die head, spraying liquid crystal polymer raw materials through a nozzle of the hot melting die head to form fibers, and enabling the fibers to fall on a conveying belt of the reticulate pattern conveying roller to form a melt-blown non-woven fabric base material, wherein the thickness of the formed non-woven fabric base material is 0.010-0.015 mm;
thirdly, forming a metal coating on the surface of the non-woven fabric substrate, wherein the thickness of the non-woven fabric substrate with the metal coating is 0.011-0.017 mm;
fourthly, the non-woven fabric base material with the metal coating is pressed through a pressure roller, the thickness of the non-woven fabric base material with the metal coating is changed into 0.010-0.015mm under the action of the pressure roller, and the conductive shielding non-woven fabric is formed;
the liquid crystal polymer adopts wholly aromatic polyester material.
2. The method of claim 1, wherein the step of forming the conductive shielding nonwoven fabric comprises: the liquid crystal polymer raw material is heated and melted by a screw extruder and then is conveyed into a melt-blowing die head.
3. The method of claim 1, wherein the step of forming the conductive shielding nonwoven fabric comprises: in the second step, the diameter of the formed fiber is 0.001-0.005 mm.
4. The method of claim 1, wherein the step of forming the conductive shielding nonwoven fabric comprises: the density of the conductive shielding non-woven fabric is as follows: the weight of each square centimeter is 0.29-0.38 g.
5. The method of claim 1, wherein the step of forming the conductive shielding nonwoven fabric comprises: the air transmissivity of the conductive shielding non-woven fabric is as follows: air transmission per square centimeter per second is: 150-.
6. The method of claim 1, wherein the step of forming the conductive shielding nonwoven fabric comprises: the non-woven fabric substrate is provided with a metal coating on the surface in a composite coating mode of vacuum plating and electroplating.
7. The method of claim 6, wherein the step of forming the conductive shielding nonwoven fabric comprises: the metal coating adopts any one or combination of copper and nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978577.5A CN112030547A (en) | 2020-09-17 | 2020-09-17 | Manufacturing method of conductive shielding non-woven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978577.5A CN112030547A (en) | 2020-09-17 | 2020-09-17 | Manufacturing method of conductive shielding non-woven fabric |
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| Publication Number | Publication Date |
|---|---|
| CN112030547A true CN112030547A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010978577.5A Pending CN112030547A (en) | 2020-09-17 | 2020-09-17 | Manufacturing method of conductive shielding non-woven fabric |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0319300A (en) * | 1989-06-15 | 1991-01-28 | Kanai Hiroyuki | Electromagnetic wave shielding material |
| JPH0548289A (en) * | 1991-08-08 | 1993-02-26 | Showa Denko Kk | Shield material for electromagnetic waves |
| JPH08329953A (en) * | 1995-05-29 | 1996-12-13 | Mitsubishi Paper Mills Ltd | Manufacture of nickel plated nonwoven fabric electrode substrate |
| DE10149645C1 (en) * | 2001-10-09 | 2003-01-23 | Thueringisches Inst Textil | Making tough electrically-conducting polymer composites for electromagnetic screening, employs metal-coated textile in polymer matrix |
| JP2005120535A (en) * | 2003-10-20 | 2005-05-12 | Tapyrus Co Ltd | Liquid crystal polyester melt blow nonwoven fabric and method for producing the same |
| JP2014201862A (en) * | 2013-04-09 | 2014-10-27 | 株式会社クラレ | Conductive nonwoven fabric |
| JP2016044368A (en) * | 2014-08-21 | 2016-04-04 | 株式会社クラレ | Conductive nonwoven fabric and method for producing melt blown nonwoven fabric used therefor |
| CN106574432A (en) * | 2014-08-22 | 2017-04-19 | 株式会社可乐丽 | Conductive nonwoven fabric and manufacturing method for melt-blown nonwoven fabric used in conductive nonwoven fabric |
| JP2019049080A (en) * | 2017-09-11 | 2019-03-28 | 三菱製紙株式会社 | Nonwoven fabric substrate for electromagnetic wave-shielding material |
-
2020
- 2020-09-17 CN CN202010978577.5A patent/CN112030547A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0319300A (en) * | 1989-06-15 | 1991-01-28 | Kanai Hiroyuki | Electromagnetic wave shielding material |
| JPH0548289A (en) * | 1991-08-08 | 1993-02-26 | Showa Denko Kk | Shield material for electromagnetic waves |
| JPH08329953A (en) * | 1995-05-29 | 1996-12-13 | Mitsubishi Paper Mills Ltd | Manufacture of nickel plated nonwoven fabric electrode substrate |
| DE10149645C1 (en) * | 2001-10-09 | 2003-01-23 | Thueringisches Inst Textil | Making tough electrically-conducting polymer composites for electromagnetic screening, employs metal-coated textile in polymer matrix |
| JP2005120535A (en) * | 2003-10-20 | 2005-05-12 | Tapyrus Co Ltd | Liquid crystal polyester melt blow nonwoven fabric and method for producing the same |
| JP2014201862A (en) * | 2013-04-09 | 2014-10-27 | 株式会社クラレ | Conductive nonwoven fabric |
| JP2016044368A (en) * | 2014-08-21 | 2016-04-04 | 株式会社クラレ | Conductive nonwoven fabric and method for producing melt blown nonwoven fabric used therefor |
| CN106574432A (en) * | 2014-08-22 | 2017-04-19 | 株式会社可乐丽 | Conductive nonwoven fabric and manufacturing method for melt-blown nonwoven fabric used in conductive nonwoven fabric |
| JP2019049080A (en) * | 2017-09-11 | 2019-03-28 | 三菱製紙株式会社 | Nonwoven fabric substrate for electromagnetic wave-shielding material |
Non-Patent Citations (1)
| Title |
|---|
| 何叶尔·李力 等: "《聚丙烯树脂的加工与应用》", 31 October 1994, 中国石化出版社 * |
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