CN208754626U - A kind of novel FPC composite electromagnetic shielding film - Google Patents
A kind of novel FPC composite electromagnetic shielding film Download PDFInfo
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- CN208754626U CN208754626U CN201821187834.8U CN201821187834U CN208754626U CN 208754626 U CN208754626 U CN 208754626U CN 201821187834 U CN201821187834 U CN 201821187834U CN 208754626 U CN208754626 U CN 208754626U
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Abstract
The utility model provides a kind of novel FPC composite electromagnetic shielding film, including carrier film, the first coatings layer being coated in carrier film, the second coatings layer being coated in the first coatings layer, the reflection of electromagnetic wave coating being coated in the second coatings layer, the electromagnetic wave absorbing coating being coated on reflection of electromagnetic wave coating.The utility model has more preferably flexibility, bending resistance, product planarization and shield effectiveness.
Description
Technical field
The utility model relates to electromangnetic spectrum fields, more particularly, to a kind of novel FPC compound type electromagnetic screen
Cover film.
Background technique
In flexible print circuit board (FPC) industry, with the update of the electronic equipments such as smart phone, Ipad, to electricity
The requirement of magnetic screen is also higher and higher.And due to the processing technology and requirement of FPC, use the electromagnetic shielding film on FPC
It must satisfy following requirement: high temperature resistant (180 DEG C, a few hours, 270 DEG C, short time) high pressure (12MPa), it is flexible resistant to bending,
1000h constant temperature and humidity (85 DEG C of temperature, 85% humidity), resistance to liquid medicine (acid, alkali, organic solvent), resistance to ultrasonic cleaning.
In the prior art, electromagnetic shielding film has the following problems: (1) insulating layer of electromagnetic shielding film uses ink, because of oil
Black molecular weight is low, and proportion of filler is high, and crosslink density is big, and ink is printed on general carrier film, and the volume contraction of curing reaction is big,
Because ink itself is partially crisp, partially hard characteristic will lead to the electromagnetic shielding film using Printing ink producing, partially hard partially crisp, not resistant to bending；With
In FPC industry, cause the flexibility, bending resistance, product planarization of electromagnetic shielding film poor；When tearing carrier film, ink is easy
With carrier film coalescence；Ink itself is more crisp, is easy to appear micro-crack, and during leading to FPC following process, liquid medicine penetrates into, and leads
Cause scrap of the product.(2) shielded layer of electromagnetic shielding film uses metal screen layer, or uses conductive layer, and metal screen layer is in FPC
In the operating process of the high temperature and pressure of subsequent complexity, situations such as metal layer is easy to appear fragmentation line, oxidation, it can make under shielding properties
Drop, or even shielding properties is lost, while blistering layering is easy in subsequent reflow Welding.(3) it is made of common conductive glue
Screened film because conductivity is low, being continuously turned on property is poor, and shielding properties is poor, is difficult meet the needs of FPC industry.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of novel FPC composite electromagnetic shielding films, have
More preferably flexibility, bending resistance, product planarization and shield effectiveness.
In order to solve the above-mentioned technical problem, the utility model provides a kind of novel FPC composite electromagnetic shielding film, packet
Include carrier film, the first coatings layer for being coated in carrier film, the second coatings being coated in the first coatings layer
Layer, the reflection of electromagnetic wave coating being coated in the second coatings layer, the electro-magnetic wave absorption being coated on reflection of electromagnetic wave coating
Coating.
It is preferred that the carrier film is to be coated with the Matte film of mould release, thickness is 25~100 μm.
It is preferred that first coatings layer is that the acrylate paint of wear-resisting type or polyurethane coating are formed
Film layer, wearability are greater than 1000 times, and thickness is 1~2 μm.
It is preferred that second coatings layer is by the acrylate paint or poly- ammonia of high filling, high tenacity
The film layer that ester paint or rubber coating are formed, number resistant to bending are greater than 80000, and thickness is 2~7 μm.
It is preferred that the reflection of electromagnetic wave coating is reflecting layer matrix resin and the film that metal packing is mixed to form
Layer, thickness is 5~10 μm.
It is preferred that described matrix resin is acrylic type or polyurethane-type or rubber-type.
It is preferred that the metal packing is sheet silver packet glass or flaky silver coated copper powder or leaf shape silver-coated copper powder
Or dendroid silver-coated copper powder；The metal packing in thickness direction having a size of 1~2 μm, 3~9 μm of plane length, described in leaf shape
There are 3~5 bifurcateds in metal packing；The metal packing mutually overlaps, and realizes continuous conduction, realizes electromagnetic wave shielding function.
It is preferred that the electromagnetic wave absorbing coating is to be mixed to form by absorbed layer matrix resin with wave class filler is inhaled
Film layer, with a thickness of 2~5 μm.
It is preferred that the absorbed layer matrix resin is acrylic type or polyurethane-type or rubber-type, the suction wave
Class filler is polypyrrole or polyaniline or polythiophene or acetylene carbon black or silicon carbide or ferrite.
It is preferred that the electromagnetic wave absorbing coating is equipped with a leafing type protective film layer.
The utility model relates to a kind of novel FPC composite electromagnetic shielding films, and compared with existing design, advantage exists
In: firstly, this patent metal packing uses sheet silver packet glass or silver-coated copper powder, leaf shape or dendroid silver-coated copper powder, with tree
The mutual overlap joint between reflection-type shielded layer, sheet or leaf shape or the realization of dendritic conductive filler is made by mixing in rouge,
Isotropic continuous conduction performance of realization long range, 1~2 μm of the thickness direction of conductive filler, 3~9 μm of planar dimension, into
One step, there are 3~5 bifurcateds, the overlap joint between being more advantageous on every leaf shape silver-coated copper powder, to realize high shielding
Effect, shield effectiveness can be improved to 40dB.Metal packing is activated, and raising can be greatly reduced in conductivity.On the basis of the above plus
If electromagnetic wave absorbing layer, polyphenyl ammonia, polypyrrole, polythiophene, acetylene carbon black, silicon carbide, iron oxygen are added in electromagnetic wave absorbing layer
Body etc. inhales wave class material, and remaining electromagnetic wave can be absorbed, and improves shield effectiveness, shield effectiveness is made to reach 60dB.
Secondly, the first coatings layer of the utility model screened film has wearability, wearability is greater than 1000 times, plays
The effect of electromagnetic membrane is protected, the second coatings layer uses high fillibility, high tenacity coating, guarantees product bending resistance, bending resistance
Folding endurance is greater than 80000 times, keeps the flexibility, bending resistance, product planarization of bulk shielding film more preferable.
Further more, the insulating layer of screened film uses coating, including the first coatings layer and the second insulation in the utility model
Dope layer, carrier film are matte release film, and coating molecular weight is big, and proportion of filler is low, more soft；Crosslink density is small, resistance to after crosslinking
High temperature and pressure will not become fragile, will not cracking, drug resistance water slug.First coatings layer is coated in matte release carrier film, is led to
The low-surface-energy of matte release film is crossed, coating cannot soak well in release film surface, due to dumb light film surface on microcosmic
It is uneven, local air-cushion can be formed between release film and dope layer, achieve the purpose that release film is separated with insulating layer.
Detailed description of the invention
Fig. 1 is the utility model longitudinal phase diagrammatic cross-section.
Appended drawing reference is as follows:
1- carrier film, the first coatings layer of 2-, the second coatings layer of 3-, 4- reflection of electromagnetic wave coating, 5- electromagnetic wave
The release protective film layer of absorber coatings, 6-.
Specific embodiment
Referring to Fig. 1, the novel FPC composite electromagnetic shielding film of one kind of the utility model, comprising: be coated with mould release
Dumb light carrier film 1, the first coatings layer 2 in carrier film 1, the second insulation in the first coatings layer 2 apply
The bed of material 3, the reflection of electromagnetic wave coating 4 in the second coatings layer 3, the electromagnetic wave on reflection of electromagnetic wave coating 4 are inhaled
Layer 5 is received, that is, may make up the electromagnetic shielding film of five-layer structure.A leafing type protective film layer is additionally provided on electromagnetic wave absorbing coating 5
6。
Carrier film 1 is that Matte film applies mould release, solves the problems, such as insulating layer and carrier UF membrane.That is matte release film is thick
Degree is 25~100 μm, preferably 50 μm.Dumb light membrane material uses PET, PBT, PNT film, mould release using silicone release film or
Non-silicon release film need to meet and mould release not occur fall off.
First coatings layer 2 is that the acrylate paint of wear-resisting type or polyurethane coating form film layer, with a thickness of 1~2 μ
M, wearability are greater than 1000 times.
Second coatings layer 3 is by height filling, the acrylate paint of high tenacity or polyurethane coating or rubber coating
The film layer of formation, with a thickness of 2~7 μm, number resistant to bending is greater than 80000.
Reflection of electromagnetic wave coating 4 is reflecting layer matrix resin and the film layer that metal packing is mixed to form, with a thickness of 5~10 μ
m.Reflecting layer matrix resin is acrylic type or polyurethane-type or rubber-type, and the metal packing is sheet silver packet glass or sheet
Silver-coated copper powder or leaf shape silver-coated copper powder or dendroid silver-coated copper powder.Metal packing in thickness direction having a size of 1~2 μm, plane
3~9 μm of length, there are 3~5 bifurcateds in metal packing described in leaf shape；The metal packing mutually overlaps, and realization is continuously led
Electricity realizes electromagnetic wave shielding function.
Electromagnetic wave absorbing coating 5 is the film layer being mixed to form by absorbed layer matrix resin and suction wave class filler, the electromagnetism
Wave absorber coatings 5 with a thickness of 2~5 μm.Wherein, absorbed layer matrix resin is acrylic type or polyurethane-type or rubber-type, institute
Stating suction wave class filler is that the mixing of one or more of polypyrrole, polyaniline, polythiophene, acetylene carbon black, silicon carbide, ferrite is filled out
Material.
Release protective film layer 6 is one of PET release film, PP release film, PBT release film, release paper, release protective film
With a thickness of 25~100 μm, preferably 50 μm.
The utility model is described further with the production method of composite electromagnetic shielding film below in conjunction with FPC.
Embodiment 1
The first coatings layer of preparation of the FPC of the utility model composite electromagnetic shielding film, the second coatings layer,
Reflection of electromagnetic wave coating, electromagnetic wave absorbing coating coating use acrylic coating, the manufacturing process that can be used is as follows.
The first step is prepared the first coatings layer, the second coatings layer, reflection of electromagnetic wave coating, electro-magnetic wave absorption and is applied
The coating of layer, can prepare, but its protection scope does not limit to the sequence with following A1, A2, A3, A4 in the following order.
A1, the first coatings coating of preparation；
(1) 7 parts of acrylic acid, 20 parts of methyl acrylate, 45 parts of acrylonitrile, 20 parts of butyl acrylate, isobomyl acrylate are taken
7 parts of ester by emulsion polymerizations be made acrylic resin I, by weight be added persulfate 0.3%~1.2%, 50~60 DEG C,
30~60h is reacted, polymerize and acrylic resin I molecular weight is made greater than 100,000.
(2) above-mentioned acrylic resin I is taken, and by weight addition 15% colour carbon black, 7% titanium in acrylic resin I
White powder, 10% silica, 1~5% propylene acid as curing agent, stir evenly, and the first coatings of wear-resisting type coating is made.Performance
It is shown in Table 1.
A2, the second coatings coating of preparation；
(1) take 4 parts of acrylic acid, 25 parts of ethyl acrylate, 45 parts of butyl methacrylate, 7 parts of acrylonitrile process lotions poly-
Close be made acrylic resin II, by weight percentage addition persulfate 0.3%~1.2%, 40~55 DEG C, reaction 40~
60h is made acrylic resin II molecular weight and is greater than 150,000.
(2) above-mentioned acrylic resin II is taken, it is micro- by weight 20% diameter, 4 μm of polyurethane are added in acrylic resin II
Ball elastomer (Zhejiang Donghua Industry Co., Ltd), be added 1~5% propylene acid as curing agent, stir evenly, be made high fillibility,
Second coatings coating of high tenacity.Performance is shown in Table 1.
A3, preparation reflection of electromagnetic wave coated coating；
(1) 11 parts of acrylic acid, 43 parts of acrylonitrile, 25 parts of butyl acrylate, 25 parts of hydroxy-ethyl acrylate are taken, by above-mentioned raw materials
Acrylic resin III is made by emulsion polymerization, by weight percentage addition persulfate 0.3%~1.2%, 60~80
DEG C, reaction 10~20h, acrylic resin III molecular weight 5~70,000.
(2) above-mentioned acrylic resin III60 parts are taken, 20 parts of bisphenol A type epoxy resin, 7 parts of dicyandiamide, diaminodiphenylsulfone
7 parts, acrylic type reflecting layer matrix resin is made in uniform stirring；
(3) sheet silver packet glass (plate nitre, S2015) is taken, 1~2 micron of thickness direction, 3~9 microns of planar dimension, often
Piece conducting powder has 3~5 bifurcateds, and activated dose of ultrasonic activation obtains evaporation shield slurry afterwards for 24 hours, and conducting powder activator is silicon
Alkane coupling agent or titanate coupling agent.
(4) it takes above-mentioned acrylic type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1:1 to be uniformly mixed,
Obtain the coating of reflection of electromagnetic wave coating.
A4, electromagnetic wave absorbing coating coating is prepared；
(1) 7 parts of acrylic acid, 45 parts of acrylonitrile, 30 parts of hydroxy-ethyl acrylate, 15 parts of n-BMA are taken, by weight
It measures percentage and persulfate 0.3%~1.2% is added, in 60~80 DEG C, 10~20h of reaction, above-mentioned raw materials are gathered by lotion
It closes and acrylic resin IV, molecular weight 5~70,000 of acrylic resin IV is made.
(2) 70 parts of above-mentioned acrylic resin IV is taken, 20 parts of bisphenol A type epoxy resin, 10 parts of diaminodiphenylsulfone, uniformly
Acrylic type absorbed layer matrix resin is made in stirring.
(3) above-mentioned 30 parts of acrylic type absorbed layer matrix resin, 20 parts of polypyrrole, acetylene carbon black and ferrite are taken by weight
50 parts of mixture, be mixed and made into acrylic type electro-magnetic wave absorption coating.
The present embodiment shield effectiveness is shown in Table 1.
Second step, coating
Greasy dirt and foreign matter on A5, removing carrier thin film volume inner face；
A6, it is coated with prepared first coatings layer on carrier thin film volume inner face, it is dry through baking oven with a thickness of 1~2 μm
It is dry to solidify the first coatings layer；Oven temperature is 60~120 DEG C, preferably 90 DEG C；Linear velocity is 5~30m/min, preferably
For 20m/min；
A7, prepared second coatings layer is coated in the first coatings layer, it is dry through baking oven with a thickness of 2~7 μm
It is dry to solidify the second coatings layer；Oven temperature is 60~120 DEG C, preferably 90 DEG C；Linear velocity is 5~30m/min, preferably
For 20m/min；
A8, it is coated with prepared reflection of electromagnetic wave coating in the second coatings layer, with a thickness of 5~10 μm, is incorporated to baking
Case is dry, and oven temperature is 60~120 DEG C, preferably 90 DEG C；Linear velocity is 5~30m/min, preferably 20m/min；
A9, it is coated with prepared electromagnetic wave absorbing coating on reflection of electromagnetic wave coating, with a thickness of 2~5 μm, is incorporated to baking oven
Dry, oven temperature is 60~120 DEG C, preferably 90 DEG C；Linear velocity is 5~30m/min, preferably 20m/min；
A10, the one leafing type protective film layer of thermal-adhering on reflection of electromagnetic wave coating；
A11, winding.
Embodiment 2
The novel FPC of the present embodiment is substantially the same manner as Example 1 with the manufacturing process of composite electromagnetic shielding film, and institute is different
Be the first coatings coating in A1, the second coatings coating in A2, reflection of electromagnetic wave coated coating in A3, in A4
The component proportion of electromagnetic wave absorbing coating coating:
Each raw material proportioning that acrylic resin I is made in A1 is different, acrylic acid, methyl acrylate, acrylonitrile, acrylic acid fourth
Ester, isobornyl acrylate additive amount be respectively 3,10,30,10,5 parts；Pigment is added in above-mentioned gained acrylic resin I
Carbon black, titanium dioxide, silica amount be respectively 10%, 3%, 5%.
Each raw material proportioning that acrylic resin II is made in A2 is different, acrylic acid, ethyl acrylate, methacrylic acid fourth
Ester, acrylonitrile additive amount be respectively 2,10,30,5 parts；The amount of organic elastomer microballoon is added in above-mentioned gained acrylic resin II
It is 10%, partial size is 7 μm.
Each raw material proportioning that acrylic resin III is made in A3 is different, acrylic acid, acrylonitrile, butyl acrylate, acrylic acid
The additive amount of hydroxyl ethyl ester is respectively 7,35,20,20 parts；The raw material proportioning that acrylic type reflecting layer matrix resin is made is different, double
Phenol F type epoxy resin substitutes bisphenol A type epoxy resin, acrylic resin III, bisphenol f type epoxy resin, dicyandiamide, diamino
The additional amount of diphenyl sulphone (DPS) is respectively 50,10,5,5 parts.
Taking flaky silver coated copper powder, (Mitsui Metal Co., Ltd. 1100YP, ball milling use after the sieving of 400 mesh；Or FUKUDA METAL, 10%
5 μm of Cu-HWQ of Ag コ ー ト is directly used), activated dose of ultrasonic activation obtains evaporation shield slurry afterwards for 24 hours.
It takes above-mentioned acrylic type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1:5 to be uniformly mixed, obtain
To the coating of reflection of electromagnetic wave coating.
Each raw material proportioning that acrylic resin IV is made in A4 is different, acrylic acid, acrylonitrile, hydroxy-ethyl acrylate, methyl
The additive amount of n-butyl acrylate is respectively 5,30,20,10 parts；The raw material proportioning of acrylic type electromagnetic wave absorbing layer resin is made
Difference, bisphenol f type epoxy resin substitute bisphenol A type epoxy resin, acrylic resin IV, bisphenol f type epoxy resin, diamino two
The additional amount of benzene sulfone is respectively 60,10,5 parts.
Embodiment 3
The novel FPC of the present embodiment is substantially the same manner as Example 1 with the manufacturing process of composite electromagnetic shielding film, and institute is different
Be the first coatings coating in A1, the second coatings coating in A2, reflection of electromagnetic wave coated coating in A3, in A4
The component proportion of electromagnetic wave absorbing coating coating:
Each raw material proportioning that acrylic resin I is made in A1 is different, acrylic acid, methyl acrylate, acrylonitrile, acrylic acid fourth
Ester, isobornyl acrylate additive amount be respectively 10,30,60,30,10 parts；Color is added in above-mentioned gained acrylic resin I
Plain carbon black, titanium dioxide, silica amount be respectively 20%, 10%, 15%.
Each raw material proportioning that acrylic resin II is made in A2 is different, acrylic acid, ethyl acrylate, methacrylic acid fourth
Ester, acrylonitrile additive amount be respectively 5,40,60,10 parts；Organic elastomer microballoon is added in above-mentioned gained acrylic resin II
Amount is 30%, and partial size is 1 μm.
Each raw material proportioning that acrylic resin III is made in A3 is different, acrylic acid, acrylonitrile, butyl acrylate, acrylic acid
The additive amount of hydroxyl ethyl ester is respectively 15,50,30,30 parts；The raw material proportioning that acrylic type reflecting layer matrix resin is made is different, phenol
Formaldehyde epoxy resin substitutes bisphenol A type epoxy resin, acrylic resin III, novolac epoxy resin, dicyandiamide, diaminodiphenylsulfone
Additional amount be respectively 70,30,10,10 parts.
Take flaky silver coated copper powder (Mitsui Metal Co., Ltd. 1100YP, ball milling, the 400 mesh mistakes of 1~2 μm of thickness, 3~9 μm of planar dimension
It is used after sieve；Or FUKUDA METAL, 5 μm of Cu-HWQ of 10%Ag コ ー ト, directly use), activated dose of ultrasonic activation for 24 hours after
Obtain evaporation shield slurry.
It takes above-mentioned acrylic type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1.5:1 to be uniformly mixed,
Obtain the coating of reflection of electromagnetic wave coating.
Each raw material proportioning that acrylic resin IV is made in A4 is different, acrylic acid, acrylonitrile, hydroxy-ethyl acrylate, methyl
The additive amount of n-butyl acrylate is respectively 10,60,40,20 parts；The raw material that acrylic type electromagnetic wave absorbing layer resin is made is matched
Than difference, novolac epoxy resin substitutes bisphenol A type epoxy resin, acrylic resin IV, novolac epoxy resin, diaminodiphenylsulfone
Additional amount be respectively 80,30,15 parts.
Embodiment 4
The first coatings layer of preparation of the FPC of the utility model composite electromagnetic shielding film, the second coatings layer,
Reflection of electromagnetic wave coating, electromagnetic wave absorbing coating coating use polyurethane coating, the manufacturing process that can be used is as follows.
The first step is prepared the first coatings layer, the second coatings layer, reflection of electromagnetic wave coating, electro-magnetic wave absorption and is applied
The coating of layer, can prepare, but its protection scope does not limit to the sequence with following B1, B2, B3, B4 in the following order.
B1, the first coatings layer of preparation；
(1) polyester polyol (PEPA) and toluene di-isocyanate(TDI) (TDI) for taking molecular weight 1000~2000, by functional group
Molar ratio 1.2:1 synthesizes hydroxyl-terminated polyurethane resin I, 0.5~1% organotin catalysts of resin solids weight ratios is added, 40
~60 DEG C, 8~10h of reaction, are then warming up to 80~100 DEG C of 5~10h of reaction, synthesize hydroxyl-terminated polyurethane resin I molecular weight 1
~3 ten thousand.
(2) above-mentioned polyurethane resin I is taken, and in polyurethane resin I by weight addition 15% colour carbon black, 7% titanium white
Powder, 10% silica are added polyurethane curing agent 1~5%, stir evenly, and the first coatings of wear-resisting type coating is made.Property
Energy parameter is shown in Table 1.
B2, the second coatings layer of preparation；
(1) polyester polyol (PEPA), the hexamethylene diisocyanate (HDI) for taking molecular weight 3000~5000, by official
Molar ratio 1.1:1 can be rolled into a ball, hydroxyl-terminated polyurethane rubber II is synthesized.It is organotin catalyzed that resin solids weight ratios 0.5~1% are added
Then agent is warming up to 80~100 DEG C of 5~10h of reaction, synthesizes hydroxyl-terminated polyurethane resin II in 40~60 DEG C, 8~10h of reaction
Molecular weight 3~60,000.
(2) above-mentioned polyurethane rubber II is taken, it is micro- by weight 20% diameter, 4 μm of polyurethane are added in polyurethane rubber II
Ball elastomer (Zhejiang Donghua Industry Co., Ltd) is added polyurethane curing agent, stirs evenly, high fillibility, high tenacity is made
The second coatings coating, performance parameter is shown in Table 1.
B3, preparation reflection of electromagnetic wave coated coating；
(1) polyester polyol (PEPA) and toluene di-isocyanate(TDI) (TDI) for taking molecular weight 4000~6000 are by functional group
Molar ratio 1.4:1, pre-polymerization, be added resin solids weight ratios 0.5~1% organotin catalysts, 50~70 DEG C, reaction 8~
Hydroxyl terminated prepolymer is made in 12h.
(2) 60 parts of above-mentioned hydroxyl terminated prepolymer, 5 parts of tripolymer of hexamethylene diisocyanate (HDI), bisphenol-A type ring are taken
15 parts of oxygen resin, 15 parts of diaminodiphenylsulfone, polyurethane-type reflecting layer matrix resin is made in uniform stirring；
(3) taking flaky silver coated copper powder, (Mitsui Metal Co., Ltd. 1100YP, ball milling use after the sieving of 400 mesh；Or FUKUDA METAL,
5 μm of Cu-HWQ of 10%Ag コ ー ト is directly used), 1~2 micron of thickness direction, 3~9 microns of planar dimension, every leaf shape
There are 3~5 bifurcateds on silver-coated copper powder, obtains evaporation shield slurry after for 24 hours through ultrasonic activation.
(4) it takes above-mentioned polyurethane-type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1:1 to be uniformly mixed,
Obtain the coating of reflection of electromagnetic wave coating.
B4, electromagnetic wave absorbing coating coating is prepared；
(1) polyester polyol for taking molecular weight 4000~6000 presses functional group's molar ratio 1.15 with toluene di-isocyanate(TDI):
1, organotin catalysts are added in pre-polymerization, and hydroxyl terminated prepolymer is made in 50~70 DEG C of 8~12h of reaction；
(2) 70 parts of above-mentioned hydroxyl terminated prepolymer is taken by weight, 5 parts of hexamethylene diisocyanate trimer, bisphenol-A type ring
15 parts of oxygen resin, 7 parts of diaminodiphenylsulfone, polyurethane-type absorbed layer matrix resin is made in uniform stirring.
(3) above-mentioned 10 parts of polyurethane-type absorbed layer matrix resin, 10 parts of polyaniline, 20 parts of silicon carbide are taken by weight, are mixed
Acrylic type electro-magnetic wave absorption coating is made.
Second step, coating
Greasy dirt and foreign matter on B5, removing carrier thin film volume inner face；
B6, pass through double mouth coating heads in carrier thin film volume inner face and be coated with simultaneously and above-mentioned prepare 2 and of the first coatings layer
Second coatings layer 3, thickness are respectively 1~2 μm, 2~7 μm, through oven drying, make the first coatings layer 2 and second absolutely
Edge dope layer 3 solidifies；Oven temperature is 60~120 DEG C, and linear velocity is 5~30m/min；Oven temperature is 60~120 DEG C, preferably
It is 90 DEG C；Efficiency, product yield can be improved in bilayer coating.
B7, it is coated with prepared reflection of electromagnetic wave coating on release film layer is incorporated to oven drying with a thickness of 5~10 μm,
Oven temperature is 60~120 DEG C, preferably 90 DEG C；Linear velocity is 5~30m/min, preferably 20m/min；
B8, the second coatings layer 3 on carrier thin film is subjected to hot pressing with the reflection of electromagnetic wave coating 4 on release film layer
It is compound；
B9, winding.
Embodiment 5
The novel FPC of the present embodiment is substantially the same manner as Example 4 with the manufacturing process of composite electromagnetic shielding film, and institute is different
Be the first coatings coating in B1, the second coatings coating in B2, reflection of electromagnetic wave coated coating in B3, in B4
The component proportion of electromagnetic wave absorbing coating coating:
Polyether polyol (PPG) replaces polyester polyol (PEPA) in B1, and methyl diphenylene diisocyanate (MDI) replaces
Toluene di-isocyanate(TDI) (TDI), the two functional group molar ratio are 1.1:1, and hydroxyl-terminated polyurethane resin is made；At above-mentioned gained end
In hydroxyl polyurethane resin I be added colour carbon black, titanium dioxide, silica amount be respectively 10%, 3%, 5%.
Polyether polyol (PPG) replaces both polyester polyol (PEPA) and hexamethylene diisocyanate (HDI) in B2
Functional group's molar ratio is 1.05:1；It is 10% in the amount that polyaminoester microball elastomer is added in above-mentioned gained polyurethane resin II, grain
Diameter is 7 μm.
Methyl diphenylene diisocyanate (MDI) replaces toluene di-isocyanate(TDI) (TDI) in B3, polyester polyol (PEPA)
Functional group's molar ratio with it is 1.3:1, and hydroxyl terminated prepolymer is made；Bisphenol f type epoxy resin replaces bisphenol type epoxy tree
Rouge, above-mentioned gained hydroxyl terminated prepolymer, hexamethylene diisocyanate (HDI) tripolymer, bisphenol f type epoxy resin, diamino
The additive amount of diphenyl sulphone (DPS) is respectively 60,1,10,10, and polyurethane-type reflecting layer matrix resin is made.
The leaf shape silver-coated copper powder for taking 1~2 μm of thickness, 3~9 μm of planar dimension, is activated after for 24 hours through ultrasonic activation
Shield slurry.
It takes above-mentioned polyurethane-type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1:5 to be uniformly mixed, obtain
To the coating of reflection of electromagnetic wave coating.
Methyl diphenylene diisocyanate (MDI) replaces toluene di-isocyanate(TDI) (TDI) in B4, polyester polyol (PEPA)
Functional group's molar ratio with it is 1.1:1, and hydroxyl terminated prepolymer is made；Bisphenol f type epoxy resin replaces bisphenol type epoxy tree
Rouge, above-mentioned gained hydroxyl terminated prepolymer, hexamethylene diisocyanate (HDI) tripolymer, bisphenol f type epoxy resin, diamino
The additive amount of diphenyl sulphone (DPS) is respectively 60,1,10,5, and polyurethane-type reflecting layer matrix resin is made.Polyaniline substitutes polypyrrole, on
State polyurethane-type reflection-type matrix resin
Embodiment 6
The novel FPC of the present embodiment is substantially the same manner as Example 4 with the manufacturing process of composite electromagnetic shielding film, and institute is different
Be the first coatings coating in B1, the second coatings coating in B2, reflection of electromagnetic wave coated coating in B3, in B4
The component proportion of electromagnetic wave absorbing coating coating: hydroxyl terminated polycarbonate (PC) replaces polyester polyol (PEPA) in B1, benzene two
Methylene diisocyanate (XDI) replaces toluene di-isocyanate(TDI) (TDI), and the two functional group molar ratio is 1.3:1, and end hydroxyl is made
Based polyurethanes resin；The amount difference of colour carbon black, titanium dioxide, silica is added in above-mentioned gained hydroxyl-terminated polyurethane resin I
It is 20%, 10%, 15%.
Hydroxyl terminated polycarbonate (PC) replaces polyester polyol (PEPA) in B2, isophorone diisocyanate (IPDI) generation
For hexamethylene diisocyanate (HDI), the two functional group molar ratio is 1.2:1, and polyurethane resin is made；It is poly- in above-mentioned gained
The amount that polyaminoester microball elastomer (Zhejiang Donghua Industry Co., Ltd) is added in urethane resin II is 30%, and partial size is 1 μm.
Benzene dimethylene diisocyanate (XDI) replaces toluene di-isocyanate(TDI) (TDI) in B3, polyester polyol (PEPA)
Functional group's molar ratio with it is 1.5:1, and hydroxyl terminated prepolymer is made；Novolac epoxy resin replaces bisphenol A type epoxy resin, different
Isophorone diisocyanate (IPDI) tripolymer replaces hexamethylene diisocyanate (HDI) tripolymer, above-mentioned gained terminal hydroxy group
Prepolymer, novolac epoxy resin, isophorone diisocyanate (IPDI), diaminodiphenylsulfone additive amount be respectively 80,10,
20,20, polyurethane-type reflecting layer matrix resin is made.
The leaf shape silver-coated copper powder of 1~2 μm of thickness, 3~9 μm of planar dimension is taken, activated dose of ultrasonic activation obtains afterwards for 24 hours
To evaporation shield slurry.
It takes above-mentioned polyurethane-type reflecting layer matrix resin and above-mentioned evaporation shield slurry to arrange by the ratio of 1.5:5 to be uniformly mixed,
Obtain the coating of reflection of electromagnetic wave coating.
Benzene dimethylene diisocyanate (XDI) replaces toluene di-isocyanate(TDI) (TDI) in B4, polyester polyol (PEPA)
Functional group's molar ratio with it is 1.3:1, and hydroxyl terminated prepolymer is made；Novolac epoxy resin replaces bisphenol A type epoxy resin, different
Isophorone diisocyanate (IPDI) tripolymer replaces hexamethylene diisocyanate (HDI) tripolymer, above-mentioned gained terminal hydroxy group
Prepolymer, isophorone diisocyanate (IPDI), novolac epoxy resin, diaminodiphenylsulfone additive amount be respectively 80,10,
20,10, polyurethane-type reflecting layer matrix resin is made.
Embodiment 7
The novel FPC of the present embodiment is substantially the same manner as Example 1 with the manufacturing process of composite electromagnetic shielding film, and institute is different
: the first step configures in coating, and the acrylic resin II in the second coatings coating replaces with molecular weight 20~300,000
Carboxy nitrile rubber or carboxylated nbr；Acrylic type reflecting layer matrix resin in reflection of electromagnetic wave coating 4 replaces with
Rubber-type reflecting layer matrix resin, carboxyl or 30~60 parts of carboxylated nbr, bisphenol A type epoxy resin, bisphenol F type epoxy
30~50 parts of one or more of resin, novolac epoxy resin, polyfunctional epoxy resin, 5~10 parts of dicyandiamide, diamino
10~20 parts of diphenyl sulphone (DPS), uniform stirring obtains rubber-type reflecting layer matrix resin.Preferably, carboxyl or carboxylated nbr
45 parts, one of bisphenol A type epoxy resin, bisphenol f type epoxy resin, novolac epoxy resin, polyfunctional epoxy resin or
Several 40 parts, 7 parts of dicyandiamide, 15 parts of diaminodiphenylsulfone.
The matrix resin of electromagnetic wave absorbing coating is rubber-type, takes carboxyl or carboxylated nbr 30~60 by weight
Part, one or more of bisphenol A type epoxy resin, bisphenol f type epoxy resin, novolac epoxy resin polyfunctional epoxy resin
It 30~50 parts, 5~10 parts of dicyandiamide, 10~20 parts of diaminodiphenylsulfone, stirs evenly, rubber-type absorbed layer matrix tree is made
Rouge.Preferably, carboxyl or 45 parts of carboxylated nbr, bisphenol A type epoxy resin, bisphenol f type epoxy resin, phenol are taken by weight
40 parts of one or more of formaldehyde epoxy resin polyfunctional epoxy resin, 7 parts of dicyandiamide, 15 parts of diaminodiphenylsulfone are made glue
Type absorbed layer matrix resin；Above-mentioned 50 parts of rubber-type absorbed layer matrix resin, 30 parts of polythiophene, 80 parts of ferrite are taken by weight,
It is mixed and made into rubber-type electro-magnetic wave absorption coating.
Each film performance detection is shown in Table 1.
Each film performance testing result of table 1
Claims (7)
1. a kind of novel FPC composite electromagnetic shielding film, it is characterised in that: including carrier film (1), be coated on carrier film
(1) the first coatings layer (2) on, the second coatings layer (3) being coated on the first coatings layer (2), are coated on
Reflection of electromagnetic wave coating (4) in second coatings layer (3), the electro-magnetic wave absorption being coated on reflection of electromagnetic wave coating (4)
Coating (5).
2. the novel FPC composite electromagnetic shielding film of one kind according to claim 1, it is characterised in that: the carrier
Film (1) is the Matte film for being coated with mould release, and thickness is 25~100 μm.
3. the novel FPC composite electromagnetic shielding film of one kind according to claim 1, it is characterised in that: described first
Coatings layer (2) is the acrylate paint of wear-resisting type or polyurethane coating forms film layer, and wearability is greater than 1000 times, thick
Degree is 1~2 μm.
4. the novel FPC composite electromagnetic shielding film of one kind according to claim 1, it is characterised in that: described second
Coatings layer (3) is the film layer formed by high filling, the acrylate paint of high tenacity or polyurethane coating or rubber coating,
Its number resistant to bending is greater than 80000, and thickness is 2~7 μm.
5. the novel FPC of one kind described in any one of -4 composite electromagnetic shielding film, feature exist according to claim 1
In: reflection of electromagnetic wave coating (4) thickness is 5~10 μm.
6. the novel FPC of one kind described in any one of -4 composite electromagnetic shielding film, feature exist according to claim 1
In: the electromagnetic wave absorbing coating (5) is with a thickness of 2~5 μm.
7. the novel FPC composite electromagnetic shielding film of one kind according to claim 1, it is characterised in that: the electromagnetism
Wave absorber coatings (5) are equipped with a leafing type protective film layer (6).
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| CN110922709A (en) * | 2019-12-18 | 2020-03-27 | 苏州世华新材料科技股份有限公司 | Conductive polymer composite wave-absorbing material and preparation method thereof |
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| CN110922709A (en) * | 2019-12-18 | 2020-03-27 | 苏州世华新材料科技股份有限公司 | Conductive polymer composite wave-absorbing material and preparation method thereof |
| CN110922709B (en) * | 2019-12-18 | 2022-07-15 | 苏州世华新材料科技股份有限公司 | Conductive polymer composite wave-absorbing material and preparation method thereof |
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