CN106700961A - Electromagnetic wave shielding film and highly transparent strong electromagnetic wave shielding tape based on electromagnetic wave shielding film - Google Patents
Electromagnetic wave shielding film and highly transparent strong electromagnetic wave shielding tape based on electromagnetic wave shielding film Download PDFInfo
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
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- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses an electromagnetic wave shielding film and a highly transparent strong electromagnetic wave shielding tape based on the electromagnetic wave shielding film. The invention is characterized in that the electromagnetic wave shielding film is prepared by coating electromagnetic wave shielding slurry on a transparent substrate, while the strong electromagnetic wave shielding tape is prepared based on the electromagnetic wave shielding film, wherein the electromagnetic wave shielding slurry is prepared by mixing silver nanowires, PEDOT:PSS, graphene, water-based acrylic resins, waterborne polyurethane resins, a curing agent, a small molecule dispersant, a flatting agent, an antifoaming agent and water. The electromagnetic wave shielding tape disclosed by the invention can reach the visible light transmittance of 90% or higher and is high in shielding effectiveness and wide in frequency range.
Description
Technical field
The electromagnetic wave shielding of the electronic component the present invention relates to be used to show, and in particular to a kind of electromagnetic shielding film and base
In its electromagnetic wave shielding adhesive tape.
Background technology
Electromagnetic wave screen paint begins to exploitation from the thirties, generally uses alkyd resin, acrylic resin, polychlorostyrene second
Alkene, polystyrene resin are main film forming matter.Nineteen fifty-seven, Japan starts to produce the electromagnetic screen coating of silver system and carbon system,
Wherein silver system is because it is main shielding material to use silver, and preparation cost is expensive.It is electromagnetism also to have Some Enterprises to use carbon system in addition
The main shielding material of shielding coating, but due to the poorly conductive of carbon system, cause shield effectiveness poor.At present, electromagnetic wave shielding
Coating be mainly by screen layer add conducting particles (such as gold, silver, nickel, copper, copper alloy, carbon black and powdered graphite) and
The adhesive of insulation is well mixed.Electromagnetic wave screen paint prepared by above does not possess good transmitance.
The common method for shielding electromagnetic wave is broadly divided into two classes：One class is to use conductive fabric to make electromagnetic shielding knot for base material
Structure, conductive fabric used in it is expensive, electrical conductivity is low, shield effectiveness is low；An other class is being led by mode of printing
Electric cover surface prints to form one layer of electrically conductive ink (such as silver paste printing ink) layer, and make the conductive ink layer fill coating in
Opening, so as to be electrically connected to the ground wire of conductive pattern, and needs to carry out electrically conductive ink heating, drying, complex operation, and
Requirement to being there is harshness by shielding element and construction environment.For example patent CN101185385A discloses a kind of electromagnetic wave shielding
Material, it uses the conductive paste of Argent grain, adhesive and solvent by being screen-printed at resin base material and then heating
Reason, it is main conductive materials that this kind of method uses Argent grain, and light transmittance is poor, needs first to print reheating treatment when in use,
Therefore its use condition is limited.
In summary, the transmitance and shield effectiveness of existing electromagnetic wave screen paint still Shortcomings part, how
Reduce production cost method while shield effectiveness high using silver material still to remain to be further improved, how more easy and effective
Use electromagnetic screen coating aspect according to need to further excavate.
The content of the invention
The present invention is to avoid above-mentioned the deficiencies in the prior art part, there is provided a kind of electromagnetic shielding film and based on it
Highly transparent strong electromagnetic wave shielding tape, it is intended on the premise of effectively reducing silver-colored consumption, improve the transmitance of electromagnetic shielding film
And shield effectiveness, while simplifying application method in the form of electromagnetic wave shielding adhesive tape.
In order to realize foregoing invention purpose, the present invention is adopted the following technical scheme that,
The present invention discloses a kind of electromagnetic shielding film first, it is characterised in that：The electromagnetic shielding film be by
Electromagnetic wave shielding slurry is coated with transparent substrates and obtain；Each raw material of the electromagnetic wave shielding slurry presses the composition of mass fraction
For：
Wherein：
The transparent substrates are PET film, PC films, PE films, PP films, PS films or PVC film.
A diameter of 20nm~100nm of the nano silver wire, length is 10 μm~200 μm.
The water-based acrylic resin be the trade mark S-20, S-70, S-90, S-120, S-160, S-812, S-820 in extremely
Few one kind, the preferably water-based acrylic resin of trade mark S-812.
The waterborne polyurethane resin is in Bayer aqueous polyurethane resin Bayhydrol B130, Bayhydrol F245
At least one, preferably Bayhydrol B130.
The curing agent is at least one in source standing grain waterborne curing agent SD 230, SD 220, SD 210, preferably aqueous solid
Agent SD 230.
The small molecule dispersant is in neopelex, calgon, ethanol, isopropanol, glycerine
At least one, preferably neopelex.
The levelling agent is at least one in Zonyl FSO, Zonyl FSJ, Zonyl FSA, Zonyl FS-520, excellent
Select Zonyl FSO.
The defoamer is at least one in German enlightening Foamex810, Foamex843 high, preferably Foamex810.
The invention also discloses highly transparent strong electromagnetic wave shielding tape, its be transparent substrates one side be formed with it is above-mentioned
Electromagnetic shielding film, adhesive layer is formed with by applied adhesive in another side, have release in the adhesive layer surface mount
Paper；
The binding agent is at least one in all types of binding agents of 3M companies, preferably EW2020.
The preparation method of above-mentioned highly transparent strong electromagnetic wave shielding tape, comprises the following steps：
(1) by nano silver wire, PEDOT:PSS, Graphene, water-based acrylic resin, waterborne polyurethane resin, curing agent,
Small molecule dispersant, levelling agent, defoamer and water are mixed in proportion, and obtain electromagnetic wave shielding slurry；
(2) electromagnetic wave shielding slurry is coated on the one side of transparent substrates by coating machine, then heating, drying, forms electricity
Magnetic wave screened film；
(3) binding agent is coated on the another side of transparent substrates by coating machine, adhesive layer is formed；
(4) by release liners and adhesive layer roll-forming, then cutting cuts, that is, obtain highly transparent strong electromagnetic wave shielding glue
Band.
Preferably, the temperature of step (2) described drying is at 60~220 DEG C.Coating process in step (2), (3) can be selected
It is selected as the one kind in intaglio plate coating, hectograph coating, the coating of saliva formula, slit coating, spraying, plating method.
Material of the present invention be novel transparent conductive material, nano silver wire be nanometer grade diameter, Micro-scale length,
Current its draw ratio can reach 1000, while silver is nature electrical conductivity highest metallic element, in terms of electromagnetic wave shielding
Show high use value.Because electromagnetic shielding film has used nanometer grade diameter silver wire, therefore can effectively ensure
The transparency of height, at the same its larger draw ratio can also effectively reduce silver usage amount, so as to reduce use cost.This
The conducting polymer PEDOT used in invention:PSS has excellent transmitance and good electrical conductivity.The piece that the present invention is used
Shape Graphene has outstanding electric conductivity, and research shows that mobility of the carrier in Graphene can reach at room temperature
15000cm2/ (Vs), equivalent to the 1/300 of the light velocity, considerably beyond other semi-conducting materials, such as indium antimonide, GaAs, silicon half
Conductor etc..The present invention is its heigh clarity and excellent rich by water-based acrylic resin and aqueous polyurethane compound use
Full scale, gloss, hardness, solvent resistance, weatherability, resistance to deflection, ageing resistance.
Beneficial effects of the present invention are embodied in：
1st, the visible light transmissivity of electromagnetic wave shielding adhesive tape of the invention can reach more than 90%, and shield effectiveness it is strong,
Frequency range is big；Additionally, the present invention is in the form of adhesive tape, application method is simple and convenient, can apply to the transparent glass of indoor and outdoor
Glass, and avoid influenceing the various electromagnetic equipments of outward appearance.
2nd, electromagnetic shielding film of the invention uses linear structure nano silver wire, liquid clear conductive material PEDOT:PSS
With sheet high connductivity Graphene, the advantage of different conductive materials is effectively make use of, improve the effect of electromagnetic shielding, and effectively
The usage amount of silver is reduced, so as to reduce cost.
3rd, electromagnetic shielding film prepared by the present invention has the ability and good flexural fatigue resistance energy of large curved surface bending, tool
There is the excellent in performance that 90-degree bent, number of bends have no adverse effects for 1000 times.
Brief description of the drawings
Fig. 1 is the structural representation of electromagnetic wave shielding adhesive tape of the present invention, label in figure：1 is electromagnetic shielding film, and 2 is transparent
Substrate, 3 is tack coat, and 4 is release liners.
Specific embodiment
Clearly elaboration explanation is done to technical scheme below by embodiment and accompanying drawing.
Following raw materials used models of embodiment, producer are as follows：
Nano silver wire, is prepared by alcohol restoring method, 20-40 μm of length, diameter 30-50nm；
Graphene, from Hefei micro crystal material Science and Technology Ltd., can market buy；
PEDOT:PSS, buys from Shanghai Chun Yuan Phytochemistry Co., Ltd；
Water-based acrylic resin S-812, buys from South Korea's Hanwha Chemical；
Waterborne polyurethane resin Bayhydrol B130, buy from Shanghai Yuan He Chemical Co., Ltd.s；
Waterborne curing agent SD 230, buys from Shanghai Yuan He Chemical Co., Ltd.s；
Small molecule dispersant neopelex, buys from Hefei Mei Feng Chemical Co., Ltd.s；
Levelling agent Zonyl FSO, buy from Guangzhou jade of the He family chemical materials Co., Ltd；
Defoamer Foamex810, buys from Shanghai Kai Yin Chemical Co., Ltd.s；
Binding agent EW2020, buys from Shanghai Chang Xiang Industrial Co., Ltd.s.
Embodiment 1
As shown in figure 1, the strong electromagnetic wave shielding tape of the present embodiment is the one side in transparent substrates 2 by being coated with electromagnetic wave
Shielding slurry is formed with electromagnetic shielding film 1, adhesive layer 3 is formed with by applied adhesive in another side, in gluing layer surface
It is pasted with release liners 4.
The quality proportioning of each raw material used by the present embodiment electromagnetic wave shielding slurry is shown in Table 1, balance of water, and preparation process is such as
Under：
(1) by nano silver wire, PEDOT:PSS, Graphene, water-based acrylic resin S-812, waterborne polyurethane resin
Bayhydrol B130, small molecule dispersant neopelex, levelling agent Zonyl FSO, defoamer Foamex810,
Curing agent SD 230 and water are mixed in proportion, and obtain electromagnetic shielding slurry；
(2) electromagnetic wave shielding slurry is coated on the one side of transparent substrates PET by coating machine, then 120 DEG C of heating
30min is dried, and forms electromagnetic shielding film；
(3) bonding agent EW2020 is coated on the another side of PET by coating machine, adhesive layer is formed；
(4) by release liners and gluing roll-forming, then cutting cuts, that is, obtain highly transparent strong electromagnetic wave shielding glue
Band.
Embodiment 2~6 is raw materials used and preparation method is same as Example 1, differs only in preparation electromagnetic shielding slurry
The quality proportioning of each raw material used is different, balance of water, and each component sum total is 100%, is shown in Table 1.
Table 1
| Embodiment | Nano silver wire | Graphene | PEDOT:PSS | Water soluble acrylic acid | Aqueous polyurethane | Small molecule dispersant | Levelling agent | Defoamer | Curing agent |
| 1 | 0.2% | 0.01% | 0.05% | 10% | 10% | 0.01% | 0.01% | 0.01% | 0.01% |
| 2 | 0.2% | 0.01% | 0.05% | 15% | 15% | 0.01% | 0.01% | 0.01% | 0.01% |
| 3 | 0.2% | 0.01% | 0.05% | 20% | 20% | 0.01% | 0.01% | 0.01% | 0.01% |
| 4 | 1% | 0.01% | 0.05% | 15% | 15% | 0.01% | 0.01% | 0.01% | 0.01% |
| 5 | 3% | 0.01% | 0.05% | 15% | 15% | 0.01% | 0.01% | 0.01% | 0.01% |
| 6 | 5% | 0.01% | 0.05% | 15% | 15% | 0.01% | 0.01% | 0.01% | 0.01% |
| 7 | 1% | 0 | 0 | 10% | 10% | 0.01% | 0.01% | 0.01% | 0.01% |
Using the shield effectiveness of GJB6190-2008 canonical measures the various embodiments described above gained electromagnetic shielding film, test frequency
It is 1GHz.Bend resistance experiment, 90 ° of bending angle are carried out using Flexing Apparatus WJJ-6C, sample preparation length × width × height is 150 × 50
× 1 (mm), bending number of times is 1000 times, the transmitance before and after energization is not changed for good after definition bending, is changed
It is changed into poor.Meanwhile, using the photoelectricity mist degree tester of Shen light board model WGW measure each embodiment gained electromagnetic shielding film can
See light transmission rate and mist degree.Concrete outcome is shown in Table 2.
Table 2
| Index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| Electromagnetic shielding effect (dB) | 72.5 | 68 | 65 | 80 | 88 | 90 | 72 |
| Visible light transmissivity (%) | 93.5 | 93.4 | 93.5 | 92.3 | 91.5 | 91.2 | 92 |
| Haze value | 1.1 | 1.2 | 1.2 | 1.5 | 2.2 | 3.1 | 1.5 |
| Bending 1000 times | Well | Well | Well | Well | Well | Well | Well |
Comparative example 1~7 understands, by nano silver wire, Graphene, PEDOT:PSS compound uses, can effectively reduce
The use content of ag material, and can reach to only with the similar effectiveness of nano silver wire.
Above-described embodiment is only intended to clearly illustrate example of the present invention, and not to the restriction of implementation method.
For those of ordinary skill in the field, the change of other multi-forms can also be made on the basis of the above description
Or change.There is no need and unable to be exhaustive to all of implementation method.And the obvious change thus amplified out
Or among changing still in protection scope of the present invention.
Claims (9)
1. a kind of electromagnetic shielding film, it is characterised in that：The electromagnetic shielding film is by being coated with electromagnetism on a transparent substrate
Wave screen is covered slurry and is obtained；Each raw material of the electromagnetic wave shielding slurry is by the composition of mass fraction：
2. electromagnetic shielding film according to claim 1, it is characterised in that：The transparent substrates are PET film, PC is thin
Film, PE films, PP films, PS films or PVC film.
3. electromagnetic shielding film according to claim 1, it is characterised in that：A diameter of 20nm of the nano silver wire~
100nm, length is 10 μm~200 μm.
4. electromagnetic shielding film according to claim 1, it is characterised in that：The water-based acrylic resin is trade mark S-
20th, at least one in S-70, S-90, S-120, S-160, S-812, S-820；The waterborne polyurethane resin is that Bayer is aqueous
At least one in Polyurethane resin Bayhydrol B130, Bayhydrol F245.
5. electromagnetic shielding film according to claim 1, it is characterised in that：The curing agent is source standing grain waterborne curing agent SD
230th, at least one in SD 220, SD 210；
The small molecule dispersant be neopelex, calgon, ethanol, isopropanol, glycerine at least
It is a kind of；
The levelling agent is at least one in Zonyl FSO, Zonyl FSJ, Zonyl FSA, Zonyl FS-520；
The defoamer is at least one in German enlightening Foamex810, Foamex843 high.
6. a kind of highly transparent strong electromagnetic wave shielding tape, it is characterised in that：The strong electromagnetic wave shielding tape is in transparent base
The one side at bottom is formed with the electromagnetic shielding film described in any one in Claims 1 to 5, and applied adhesive is passed through in another side
Adhesive layer is formed with, there are release liners in the adhesive layer surface mount.
7. highly transparent strong electromagnetic wave shielding tape according to claim 1, it is characterised in that：The binding agent is 3M public
At least one taken charge of in all types of binding agents.
8. in a kind of claim 6~7 highly transparent strong electromagnetic wave shielding tape described in any one preparation method, its feature
It is to comprise the following steps：
(1) by nano silver wire, PEDOT:PSS, Graphene, water-based acrylic resin, waterborne polyurethane resin, curing agent, small point
Sub- dispersant, levelling agent, defoamer and water are mixed in proportion, and obtain electromagnetic wave shielding slurry；
(2) electromagnetic wave shielding slurry is coated on the one side of transparent substrates by coating machine, then heating, drying, forms electromagnetic wave
Screened film；
(3) binding agent is coated on the another side of transparent substrates by coating machine, adhesive layer is formed；
(4) by release liners and adhesive layer roll-forming, then cutting cuts, that is, obtain highly transparent strong electromagnetic wave shielding tape.
9. preparation method according to claim 8, it is characterised in that：The temperature of step (2) described drying is 60~220
℃。
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Cited By (6)
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| US10000644B2 (en) * | 2013-07-03 | 2018-06-19 | The Boeing Company | Conductive water borne coatings and methods for enhancing coating conductivity |
| CN108774450A (en) * | 2018-06-08 | 2018-11-09 | 上海大学 | Metal nanoparticle welds the preparation method of nano silver wire electromagnetic shielding slurry |
| CN109553793A (en) * | 2018-11-27 | 2019-04-02 | 湖南国盛石墨科技有限公司 | A kind of flexibility PA graphene electromagnetic shielding material and preparation method thereof |
| CN109608676A (en) * | 2018-12-03 | 2019-04-12 | 湖南国盛石墨科技有限公司 | Flexible PC graphene coating electromagnetic shielding membrane material and preparation method thereof |
| CN109721754A (en) * | 2018-12-28 | 2019-05-07 | 邵敏芝 | A kind of environment-friendly water-based oil resistant glue and the method using the hydrophobic high stretching PVC film of its preparation oil resistant |
| CN110722151A (en) * | 2018-07-16 | 2020-01-24 | 宁波山功新材料科技有限公司 | Metal nanoparticle composite silver nanowire and preparation method and application thereof |
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| US10000644B2 (en) * | 2013-07-03 | 2018-06-19 | The Boeing Company | Conductive water borne coatings and methods for enhancing coating conductivity |
| CN108774450A (en) * | 2018-06-08 | 2018-11-09 | 上海大学 | Metal nanoparticle welds the preparation method of nano silver wire electromagnetic shielding slurry |
| CN110722151A (en) * | 2018-07-16 | 2020-01-24 | 宁波山功新材料科技有限公司 | Metal nanoparticle composite silver nanowire and preparation method and application thereof |
| CN109553793A (en) * | 2018-11-27 | 2019-04-02 | 湖南国盛石墨科技有限公司 | A kind of flexibility PA graphene electromagnetic shielding material and preparation method thereof |
| CN109608676A (en) * | 2018-12-03 | 2019-04-12 | 湖南国盛石墨科技有限公司 | Flexible PC graphene coating electromagnetic shielding membrane material and preparation method thereof |
| CN109608676B (en) * | 2018-12-03 | 2022-03-22 | 湖南国盛石墨科技有限公司 | Flexible PC graphene coated electromagnetic shielding film material and preparation method thereof |
| CN109721754A (en) * | 2018-12-28 | 2019-05-07 | 邵敏芝 | A kind of environment-friendly water-based oil resistant glue and the method using the hydrophobic high stretching PVC film of its preparation oil resistant |
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