CN110128965A - A kind of electromagnetic shielding composite material and preparation method thereof - Google Patents
A kind of electromagnetic shielding composite material and preparation method thereof Download PDFInfo
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- CN110128965A CN110128965A CN201910476992.8A CN201910476992A CN110128965A CN 110128965 A CN110128965 A CN 110128965A CN 201910476992 A CN201910476992 A CN 201910476992A CN 110128965 A CN110128965 A CN 110128965A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/064—Copolymers with monomers not covered by C09J133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
- C09J193/04—Rosin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
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Abstract
The present invention provides a kind of electromagnetic shielding composite materials, including plastic film layers, metal foil layer, pressure-sensitive adhesive layer and the separated type material layer from top to bottom successively contacted；The apparent colour of the electromagnetic shielding composite material is black；The film layer is cast polypropylene film；The film layer with a thickness of 0.005~0.05mm.The present invention can also successively be compounded with metal foil layer and black printed layer on the plastic film layers, form double-level-metal foil construction.The present invention, as soft plastic film layers, has positive effect to the anti-aspect of performance that warps for solving final product using cast polypropylene film.Meanwhile the present invention further optimizes the ingredient of other film layers, such as pressure-sensitive adhesive layer, cooperation cast polypropylene film obtains the preferably anti-effect that warps.The present invention also provides a kind of preparation methods of electromagnetic shielding composite material.
Description
Technical field
The invention belongs to technical field of polymer composite materials more particularly to a kind of electromagnetic shielding composite material and its preparations
Method.
Background technique
With the rapid development of international information technology industry, as mobile phone, computer, notebook and other kinds of movement
Terminal shows product, and display industry also continues to introduce new, and product size is gradually more to ultrathin, screen enlarging, narrow frame etc.
Memberization direction is developed.Display panel has the front towards user and the back side backwards to user, the surrounding of display panel
Edge is equipped with bound edge, and the bad phenomenons such as light leakage often occurs in display panel in the prior art.
In addition, the job site environment of modern electronic product is increasingly complicated, many electronic products itself, which are also one, to be had
The complication system of numerous circuit systems, between the electromagnetic radiation and built-in system outside these products, each transmission channel
Between, the electromagnetic interference between internal component to harm caused by these products, seriously threatened the stabilization of its work
Property, reliability and safety, therefore, anti-electromagnetic interference has been one of people increasingly focus of attention.
Shading wheat draws the appearance of aluminum foil and adhesive tape, by feat of good shading performance and the effectiveness of metal aluminum foil,
The very good solution demand of shading and electromagnetic shielding.Shading wheat on the market draws aluminum foil and adhesive tape usually to have black ink at present
Layer, PET laminated polyester film and electromagnetic shielding metal layer are constituted, and wherein black ink layer is prepared by mode of printing, by black printing
The shading wheat drawing aluminium foil that PET polyester film and metal aluminum foil are prepared using the compound technique of composite glue.Such product is due to PET
Polyester material is easy to happen the phenomenon that warping after having elasticity modulus height, long-time hot and humid environment, eventually leads to inharmonious, leakage
A problem that light.
Summary of the invention
Electromagnetic shielding composite wood the present invention provides a kind of electromagnetic shielding composite material and preparation method thereof, in the present invention
Material, which can effectively resist, to warp, while having Low ESR, good electromagnetic shielding, shading, high cohesive force and removing special without residue glue etc.
Point.
The present invention provides a kind of electromagnetic shielding composite material, including plastic film layers, the metal from top to bottom successively contacted
Layers of foil, pressure-sensitive adhesive layer and separated type material layer；
The apparent colour of the electromagnetic shielding composite material is black；
The plastic film layers be cast polypropylene film, the plastic film layers with a thickness of 0.005~0.05mm.
Preferably, adhesive phase, metal foil layer and black printed layer are also successively compounded on the plastic film layers.
Preferably, the surface of the plastic film layers carries out Corona Surface Treatment or plasma surface treatment.
Preferably, there are also compound adhesive water layers between the plastic film layers and metal foil layer, and the compound adhesive water layer is by gathering
Urethane glue or polyester glue are made；
The compound adhesive water layer with a thickness of 0.001~0.01mm.
Preferably, the metal foil layer is aluminium foil layer, further preferably soft aluminium foil layer；
The metal foil layer with a thickness of 0.005~0.05mm.
Preferably, the pressure-sensitive adhesive layer is the acrylic acid series glue layer that inside is dispersed with conducting particles,
The pressure-sensitive adhesive layer with a thickness of 0.005~0.1mm.
Preferably, the conducting particles is one in nickel powder, bronze, silver powder, conductive black and surface cladding type metal powder
Kind is several；
The shape of the conducting particles is one or more of near-spherical, spherical, chain and sheet；
The partial size of the conducting particles is 0.005~0.1mm.
Preferably, the acrylic acid series glue is made of acrylate polymer, tackifying resin, additive and crosslinking agent；
The weight average molecular weight of the acrylate polymer is 50~1,500,000.
The present invention provides a kind of preparation method of electromagnetic shielding composite material, comprising the following steps:
A) in the compound cast polypropylene film of metal foil surface, first base material is obtained；
B) acrylic acid series glue application is bonded separated type material, obtains electromagnetism in the metal foil surface of the first base material
Shielding composite.The acrylic acid series glue application can be by the way of straight painting or turning to apply, and glue surface can have a leafing
Profile material is to facilitate winding and use.
Preferably, after obtaining the first base material, on the cast polypropylene film surface of the first base material, coating is compound
Glue is bonded with the metal foil for being printed with black printed layer after dry, obtains the second substrate；
Then the non-printing surface of the metal foil of second substrate is coated with acrylic acid series glue, obtains being electromagnetically shielded compound
Material.Glue application can be by the way of straight painting or turning to apply, and glue surface can facilitate winding and be made with one layer of separated type material
With.
The present invention provides a kind of electromagnetic shielding composite materials, including plastic film layers, the gold from top to bottom successively contacted
Belong to layers of foil, pressure-sensitive adhesive layer and separated type material layer；The apparent colour of the electromagnetic shielding composite material is black；The plastic film
Layer is cast polypropylene film；The plastic film layers with a thickness of 0.005~0.05mm.The present invention is using soft curtain coating poly- third
Alkene film replaces conventional rigid PET polyester film as plastic film layers, to the anti-aspect of performance tool that warps for solving final product
There is positive effect.Meanwhile the present invention further optimizes the ingredient of other film layers, such as pressure-sensitive adhesive layer, cooperation cast polypropylene is thin
Film obtains the preferably anti-effect that warps.
Specific embodiment
The present invention provides a kind of electromagnetic shielding composite materials, including plastic film layers, the gold from top to bottom successively contacted
Belong to layers of foil, pressure-sensitive adhesive layer and separated type material layer；
The apparent colour of the electromagnetic shielding composite material is black；
The plastic film layers are cast polypropylene film；The plastic film layers with a thickness of 0.005~0.05mm.
In the present invention, the plastic film layers are soft plastic film, preferably cast polypropylene film, the application
After study, product made from existing PET mylar under conditions of high temperature and humidity, pay no attention to by long-term proof stress effect
Think, is easy to cause product to warp, inharmonious phenomenon generation, and the cast polypropylene film in the application is raw by casting technique
The cast film of obtained tensionless winkler foundation, non-directional is produced, tensile strength is balanced compared in terms of the comprehensive performances such as elasticity modulus, is protecting
While holding certain tensile strength, have the characteristics that low elastic modulus, has to the anti-aspect of performance that warps for solving final product
Positive effect.
In the present invention, the thickness of the cast polypropylene film is preferably 0.005~0.05mm, and more preferably 0.015
~0.018mm；The tensile strength of the cast polypropylene film preferably >=45MPa；The fracture of the cast polypropylene film is stretched
Long rate is preferably >=700%.
The cast polypropylene film directly can carry out curtain coating production in metal foil surface, carry out with metal foil compound；
It can also be compound by first preparing cast polypropylene film, then by composite glue and metal foil progress.
It in the present invention, can be by polypropylene when using directly when by the way of metal foil surface cast polypropylene film
Particle carry out heating plasticizing, squeeze out curtain coating, cooling and shaping, corona, winding become it is integrated spare.
In the present invention, the cast polypropylene film can first be prepared according to the following steps to obtain: by certain formula
Ratio deployed resin after melt is put into hopper, is cast to Quench roller surface by the flat-shaped extrusion of die head, is formed after cooling thin
Film, curtain coating chill roll are designed using jacket type, by adjusting its temperature with automatic temperature-adjusting control system.In addition, passing through gas
Knife adjusts gap, so that film is close to curtain coating roller surface, to improve cooling effect, the film produced also needs to take place frequently by height
Raw device carries out Corona Surface Treatment or plasma surface treatment, is broken Plastic film surface chain molecule, generates freely
Oxidation, cross-linking reaction occur for base and gas ionization product, generate polar group in film surface, to increase the surface of film
Power improves printing and the coating performance of film.
In the present invention, the compound adhesive water layer is commercially available composite glue, preferably polyurethane adhesive water layer or polyester adhesive
The thickness of water layer, more preferably polyurethane adhesive water layer, the compound adhesive water layer is preferably 0.001~0.01mm, more preferably
0.004mm。
Wherein, black printing or make present invention preferably uses black plastic film layer, in plastic film layer surface
With dark colored binder, to realize the apparent colour of black.It, can be by thin in plastics when using the scheme of black plastic film
Black carbon black is added in film raw material or prepared by the mode of black dyes；It, can be by viscous when using dark colored binder
Carbon black is added in mixture raw material or the mode of black dyes is solved.In the present invention, the black carbon black or black dye
The additive amount of material can be selected according to actual needs, and the present invention does not do particular determination.
In the present invention, the black printed layer is preferably thermoset polyurethane ink printed layer, the black printed layer
Thickness be preferably 0.001~0.01mm, more preferably 0.004mm.
In the present invention, the metal foil layer is preferably aluminium foil layer, further preferably soft aluminium foil layer.The metal foil
Layer can greatly improve the bond effect with compound adhesive water layer, pressure-sensitive adhesive layer by oil removing annealing processing；The metal foil
Thickness is preferably 0.005~0.05mm, more preferably 0.01~0.015mm.
In the present invention, the pressure-sensitive adhesive layer is preferably the internal acrylic acid series glue layer for being dispersed with conducting particles, described
Conducting particles with specified particle diameter size is dispersed in pressure-sensitive adhesive layer, by the connection of conducting particles and metal foil layer, is reached
It is grounded the purpose for destaticing, being electromagnetically shielded.
In the present invention, the conducting particles is preferably the metal powders such as nickel powder, bronze, silver powder, conductive black etc. and surface
One or more of cladded type metal powder etc.；The conducting particles is preferably shaped in near-spherical, spherical, chain and sheet
One or more, more preferably spherical and chain is more advantageous to and matches with the glue-line of different-thickness, reaches perforation adhesive
The conductive effect of layer.In addition, in the case where not considering economy, it is also contemplated that nickel powder and silver powder or bronze mixed
Mode is added, and silver powder or bronze have better electric conductivity, can preferably achieve the effect that conduction.The conductive particle
The partial size of son is preferably 0.005~0.1mm, more preferably 0.02~0.08mm, most preferably 0.05~0.06mm.The present invention is excellent
Choosing matches the partial size of conducting particles according to the thickness of pressure-sensitive adhesive layer, e.g., in the case where 0.02mm dry film glue is thick, preferably makes
The conducting particles for being 0.02mm with D50.
In the present invention, based on parts by weight, the acrylic acid series glue is by 100 parts of polymer, 10~50 parts of thickening trees
Rouge, 5~10 parts of additives and 0.05~2 part of crosslinking agent are prepared,
The polymer can be obtained by acrylicacidandesters class monomer by free radical polymerization, and weight average molecular weight range is
50~1,500,000, glass transition temperature is -50 DEG C~-20 DEG C.When molecular weight is too low, obtained pressure sensitive adhesive cohesive performance is not
Foot, is easy to happen residue glue, it is not easy to the bad risk such as cross cutting；When molecular weight is excessively high, although pressure sensitive adhesive cohesive performance, die cuttability
It can be improved, still, obtained pressure sensitive adhesive tack, adhesion strength performance is insufficient, it is not easy to paste, hold after long-time service
Easily occur inharmonious, alice bad.Polymer of the present invention is preferably that hard monomer, soft monomer and function monomer pass through initiator
Initiated polymerization preparation, wherein hard monomer can be selected from vinyl acetate, acrylonitrile, acrylamide, styrene, metering system
One or more of sour methyl esters and methyl acrylate, for providing polymer cohesive force；Soft monomer can be selected from acrylic acid second
One or more of ester, butyl acrylate and acrylic acid-2-ethyl caproite, for providing virgin rubber stickiness；Function monomer can be with
Selected from methacrylic acid, acrylic acid, itaconic acid, hydroxy-ethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, methyl
Hydroxypropyl acrylate, Dimethylaminoethyl Methacrylate, acrylamide, N hydroxymethyl acrylamide, Glycidyl methacrylate
One or more of glyceride and maleic anhydride, for providing crosslinking points, cohesive force；Initiator usually selects thermal initiator,
Such as peroxide or azo, it is preferred that the peroxide can select benzoyl peroxide, benzoyl peroxide first
One or more of the acyl tert-butyl ester and methyl ethyl ketone peroxide, azo can select azodiisobutyronitrile class and/or azo two
Different heptonitrile.By the way that above-mentioned material progress Raolical polymerizable is prepared into polymer.Specifically, in the present invention, it is described poly-
Closing object can be used 20 parts of toluene (solvent), 50 parts of butyl acrylates, 30 parts of methyl acrylates, 2 parts of acrylic acid, 0.5 part of peroxide
Change benzoyl, lead to the air in nitrogen replacement reaction kettle, be heated to 60 DEG C, keeps the temperature 5 hours, add 0.5 part of benzoyl peroxide first
Acyl, then 2 hours are kept the temperature, cool down, solvent dilution, discharge to obtain polymer.
The tackifying resin can be rosin, modified rosin class, terpene resin and its hydride, Petropols, phenolic aldehyde
One of resin etc. is a variety of, and the present invention is preferably rosin and its modified rosin resinoid.The additive is carbon black, black
Pigment etc., the black additive can be obtained by commercially available mode.The crosslinking agent is isocyanates, epoxies, metal salt
Class, aziridines it is one or more, the present invention is preferably isocyanates and epoxies crosslinking agent；
In the present invention, pressure sensitive adhesive one side can also be fitted with separated type material, to be conducive to whole winding and use.Institute
Stating separated type material layer is preferably release film or release paper；The off-type force of the separated type material layer is preferably 5~30g/25mm, release
Too small will lead to of power cannot be bonded glue film well, and off-type force is excessive to cause adhesive tape sample to crimp when will lead to removing, no
Situations such as being easily peeled off.The main function of separated type material is convenient for winding, cross cutting, uncoiling, therefore the present invention is to its thickness range
It is not particularly limited.
In addition to the electromagnetic shielding composite material of above-mentioned film layer structure, the present invention preferably additionally provides second of film layer structure
Electromagnetic shielding composite material, second of electromagnetic shielding composite material preferably can also be in the bases of the first above-mentioned film layer structure
Successively compound compound adhesive water layer, metal foil layer and black printed layer again on plinth, that is, successively multiple on the surface of the plastic film layers
Close compound adhesive water layer, metal foil layer and black printed layer.In order to be distinguished, the present invention in this configuration by plastic film layers and
Metal foil layer between pressure-sensitive adhesive layer is named as the first metal foil layer, by the metal foil between plastic film layers and black printed layer
Layer is named as the second metal foil layer.
In the present invention, the compound adhesive water layer, preferably polyurethane adhesive water layer and polyester glue layer, more preferably poly- ammonia
The thickness of ester gum water layer, the compound adhesive water layer is preferably 0.001~0.01mm, more preferably 0.004mm.
In the present invention, second metal foil layer is preferably aluminium foil layer, further preferably soft aluminium foil layer.The gold
Belong to layers of foil by oil removing annealing processing, can greatly improve the bond effect with compound adhesive water layer, pressure-sensitive adhesive layer；The metal
The thickness of foil is preferably 0.005~0.05mm, more preferably 0.01~0.015mm.
In the present invention, the black printed layer is preferably thermoset polyurethane ink printed layer, the black printed layer
Thickness be preferably 0.001~0.01mm, more preferably 0.004mm.
The present invention also provides a kind of preparation methods of electromagnetic shielding composite material, comprising the following steps:
A) in the compound cast polypropylene film of metal foil surface, first base material is obtained；
B) acrylic acid series glue application is bonded separated type material, obtains electromagnetism in the metal foil surface of the first base material
Shielding composite.
For the electromagnetic shielding composite material of the first film layer structure described above, it is prepared according to the following steps to obtain:
In the present invention, composite glue can be coated in the adhesive property of metal foil in metal foil in order to better improve
Before, sided corona treatment is carried out to metal foil.It can be coated with composite glue using anilox roll coating method, obtained after baking oven drying is dry
0.003~0.005mm dry glue thickness, is bonded with the cast polypropylene film printed, and winding obtains first base material；
In the present invention, PP GRANULES directly can also be subjected to heating plasticizing, squeeze out to be cast in metal foil surface and gathers
Polypropylene film, cooling and shaping, corona, winding obtain first base material.
Using blade coating mode, the metal of the first base material by deployed acrylic acid series glue application in above-mentioned preparation
Foil face.Before coating, sided corona treatment is carried out to metal foil and obtains dry glue film after multilevel drying oven drying, is bonded release material
Material, obtains electromagnetic shielding composite material.
In the present invention, the printing of the cast polypropylene film preferably follows the steps below:
The surface black of cast polypropylene film prints, using commercially available thermoset polyurethane ink, using intaglio printing
Equipment.When being coated with ink, first layer printing first is carried out to the one side of cast polypropylene film, after being completed for printing, baking oven drying adds
Temperature curing 24 hours, obtains the ink layer of 0.001~0.002mm thickness, hereafter, enterprising in existing ink layer in the same way
Row prints again, until ink film thickness reaches 0.003~0.005mm, obtains black printed layer, can be with by repeatedly printing
The uniformity of effective control thickness, solves the risk of shading rate deficiency and pinprick.It is directly cast when using in metal foil surface
When polypropylene film mode, black ink printing directly can be carried out on the cast polypropylene film surface of first base material；In addition,
It can also be cast by way of carbon black or black dyes is added in PP GRANULES, it is black for directly obtaining apparent colour
The first base material of color.
It is described above that carry out printing on cast polypropylene film surface be to obtain the electromagnetic shielding that apparent colour is black
One of approach of composite material can also directly add black carbon black or black dye in the raw material of production cast polypropylene film
The mode of material solves, or can be solved by way of adding carbon black or black dyes in adhesive.
In the present invention, the formula of the acrylic acid series glue and preparation method and pressure-sensitive adhesive layer described above are matched
Side and preparation method are consistent, and details are not described herein.
For the electromagnetic shielding composite material of second of film layer structure described above, the present invention is preferably according to the following steps
It is prepared:
The metal foil of oil removing annealing is selected, composite glue, can be in gold in the adhesive property of aluminium foil in order to better improve
Before belonging to foil coating, sided corona treatment is carried out to it, polyurethane glue is coated with using anilox roll coating method, after baking oven drying is dry
It to 0.003~0.005mm dry glue thickness, is bonded with cast polypropylene film, before fitting, for the bonding for improving composite glue
Cast polypropylene film can be carried out sided corona treatment by performance, and it is spare that fitting winding obtains intermediate product.In addition it is also possible to directly exist
Metal foil surface carries out the curtain coating of polypropylene material, and it is spare that winding obtains intermediate product.
Secondary coating is carried out in the cast polypropylene film face of intermediate product obtained above, before coating, corona is carried out to it
Processing is coated with composite glue using anilox roll coating method, obtains 0.003~0.005mm dry glue thickness after baking oven drying is dry,
It is bonded with the non-printed side of ferrous metal foil, winding obtains the second substrate；
Using blade coating mode, deployed acrylic pressure sensitive glue is coated on to the gold of the second substrate of above-mentioned preparation
Belong to foil face.Before coating, sided corona treatment is carried out to metal foil, after multilevel drying oven drying, dry glue film is obtained, is bonded release
Material obtains electromagnetic shielding composite material.
In the present invention, the preparation method of the ferrous metal foil preferably follows the steps below:
Using commercially available thermoset polyurethane ink, using gravure printing apparatus, when being coated with ink, first to the one of metal foil
Face carries out first layer printing.In order to better improve composite glue metal foil adhesive property, can metal foil coating before,
Sided corona treatment is carried out to it, after being completed for printing, baking oven drying, heating curing 24 hours obtains 0.001~0.002mm thickness
Hereafter ink layer is printed on existing ink layer again in the same way, until ink film thickness reach 0.003~
It is spare to obtain ferrous metal foil by 0.005mm.
In the present invention, the formula of the acrylic acid series glue and preparation method and pressure-sensitive adhesive layer described above are matched
Side and preparation method are consistent, and details are not described herein.
The present invention provides a kind of electromagnetic shielding composite materials, including plastic film layers, the gold from top to bottom successively contacted
Belong to layers of foil, pressure-sensitive adhesive layer and separated type material layer；The apparent colour of the electromagnetic shielding composite material is black；The plastic film
Layer is cast polypropylene film；The plastic film layers with a thickness of 0.005~0.05mm.The present invention is thin using cast polypropylene
Film has positive effect as soft plastic film layers, to the anti-aspect of performance that warps for solving final product.Meanwhile the present invention
Further optimize the ingredient of other film layers, such as pressure-sensitive adhesive layer, cooperation cast polypropylene film obtains the preferably anti-effect that warps.
In order to further illustrate the present invention, with reference to embodiments to a kind of electromagnetic shielding composite material provided by the invention
And preparation method thereof be described in detail, but limiting the scope of the present invention cannot be understood as.
Embodiment 1
The preparation of substrate
Using the cast polypropylene film of 0.010mm thickness, commercially available thermoset polyurethane ink is set using intaglio printing
It is standby, when being coated with ink, first layer printing first is carried out to the one side of cast polypropylene film, after being completed for printing, baking oven drying, heating
Curing 24 hours, obtains the ink layer of 0.001mm thickness, hereafter, is printed again on existing ink layer in the same way
Brush, until to reach 0.003mm spare for ink film thickness.
It is cast by slot coated mode in above-mentioned gained black printing using Commercial epoxy modified polyurethane solvent adhesive
It is coated with 0.003mm thickness dry glue on polypropylene film, is bonded the soft oil removing annealing aluminium foil Jing Guo sided corona treatment, wherein aluminium foil
With a thickness of 0.007mm, it is spare to obtain compound plastics Al foil substrate.
The preparation of conductive adhesive
The preparation of pressure sensitive adhesive polymer: 20 parts of toluene, 50 parts of butyl acrylates, 30 parts of acrylic acid are added in four mouthfuls of reaction kettles
Methyl esters, 2 parts of acrylic acid, 0.5 part of benzoyl peroxide lead to the air in nitrogen replacement reaction kettle, are heated to 60 DEG C, heat preservation 5 is small
When, add 0.5 part of benzoyl peroxide, then keep the temperature 2 hours, cool down, solvent dilution, discharge polymer is spare.
Take the polymer of the above-mentioned preparation of 100 parts by weight, 25 parts by weight rosin resinoid GB-125 (waste river chemistry manufacture),
10 parts by weight of spherical conductive nickel powder of D50 partial size 0.025mm, 8 parts by weight black pigments, isocyanates crosslinking agent (Cohan wound
Company's manufacture) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28% and contains admittedly
The acrylic pressure sensitive glue of amount is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 2
The preparation of substrate
Using the cast polypropylene film of 0.010mm thickness, commercially available thermoset polyurethane ink is set using intaglio printing
It is standby, when being coated with ink, first layer printing first is carried out to the one side of cast polypropylene film, after being completed for printing, baking oven drying, heating
Curing 24 hours, obtains the ink layer of 0.002mm thickness, hereafter, is printed again on existing ink layer in the same way
Brush, until to reach 0.005mm spare for ink film thickness.
It is cast by slot coated mode in above-mentioned gained black printing using Commercial epoxy modified polyurethane solvent adhesive
It is coated with 0.005mm thickness dry glue on polypropylene film, is bonded the soft oil removing annealing aluminium foil Jing Guo sided corona treatment, wherein aluminium foil
With a thickness of 0.012mm, it is spare to obtain compound plastics Al foil substrate.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid GB-125 (waste river chemistry systems
Make), 10 parts by weight of spherical conductive nickel powder of D50 partial size 0.025mm, 8 parts by weight black pigments, isocyanates crosslinking agent (section
The manufacture of Si Chuan company) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28%
The acrylic pressure sensitive glue of solid content is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 3
The preparation of substrate
Using the cast polypropylene film of 0.015mm thickness, commercially available thermoset polyurethane ink is set using intaglio printing
It is standby, when being coated with ink, first layer printing first is carried out to the one side of cast polypropylene film, after being completed for printing, baking oven drying, heating
Curing 24 hours, obtains the ink layer of 0.002mm thickness, hereafter, is printed again on existing ink layer in the same way
Brush, until to reach 0.004mm spare for ink film thickness.
It is cast by slot coated mode in above-mentioned gained black printing using Commercial epoxy modified polyurethane solvent adhesive
It is coated with 0.003mm thickness dry glue on polypropylene film, is bonded the soft oil removing annealing aluminium foil Jing Guo sided corona treatment, wherein aluminium foil
With a thickness of 0.009mm, it is spare to obtain compound plastics Al foil substrate.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid D-125 (waste river chemistry manufacture),
10 parts by weight of chain conduction nickel powder of D50 partial size 0.015mm, 8 parts by weight black pigments, isocyanates crosslinking agent (Cohan wound
Company's manufacture) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28% and contains admittedly
The acrylic pressure sensitive glue of amount is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.015mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 4
The preparation of substrate
The surface black of soft aluminium foil prints, and is applied using commercially available thermoset polyurethane ink using gravure printing apparatus
When cloth ink, first layer printing first is carried out before aluminium foil coating to the one side of the soft aluminium foil of 0.007mm thickness, electricity is carried out to it
Dizzy processing, after being completed for printing, baking oven drying, heating curing 24 hours obtains the ink layer of 0.001mm thickness, hereafter, with same
Mode printed again on existing ink layer, until ink film thickness reaches 0.003mm, it is spare to obtain black aluminium foil.
Using the soft aluminium foil of oil removing annealing of 0.007mm thickness, sided corona treatment is carried out to it before coating, using reticulate pattern roller coating
Mode for cloth is coated with polyurethane glue, 0.003~0.005mm dry glue thickness is obtained after baking oven drying is dry, with 0.010mm thickness
Cast polypropylene film is bonded, and before fitting, for the adhesive property for improving composite glue, can be carried out cast polypropylene film
Sided corona treatment, it is spare that fitting winding obtains intermediate product.
Secondary coating is carried out in the cast polypropylene film face for the intermediate product that upper step obtains, before coating, corona is carried out to it
Processing is coated with polyurethane glue using anilox roll coating method, obtains 0.003mm dry glue thickness after baking oven drying is dry, and black
The non-printed side of color aluminium foil is bonded, and it is spare that winding obtains two substrate of scheme.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid D-125 (waste river chemistry manufacture),
10 parts by weight of chain conduction nickel powder of D50 partial size 0.015mm, 10 parts by weight black pigments, isocyanates crosslinking agent (Cohan wound
Company's manufacture) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28% and contains admittedly
The acrylic pressure sensitive glue of amount is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.015mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 5
The preparation of substrate
The embodiment uses substrate prepared by embodiment 4.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid RE-100L (Ke Teng companies, the U.S.
Manufacture), 10 parts by weight of chain conduction nickel powder of D50 partial size 0.025mm, 5 parts by weight black pigments, isocyanates crosslinking agent
(company's manufacture is created in Cohan) 2 parts by weight, carry out solid content adjustment using solvent, while carrying out high-speed stirred dispersion, are prepared
The acrylic pressure sensitive glue of 28% solid content is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 6
The preparation of substrate
12um thickness is selected, the soft oil removing annealing aluminium foil by sided corona treatment unreels, poly- in aluminium foil surface curtain coating 10um
Polypropylene film obtains cast polypropylene Al foil substrate.Using commercially available thermoset polyurethane ink, using gravure printing apparatus,
First layer printing is carried out in cast polypropylene film one side, before coating, sided corona treatment, print are carried out to cast polypropylene film surface
After the completion of brush, baking oven drying, heating curing 24 hours obtains the ink layer of 0.001mm thickness, hereafter, exists in the same way
It is printed again on existing ink layer, until ink film thickness reaches 0.003mm, it is standby to obtain black cast polypropylene aluminium foil
With.
The preparation of conductive adhesive
The preparation of pressure sensitive adhesive polymer: 20 parts of toluene, 50 parts of butyl acrylates, 30 parts of acrylic acid are added in four mouthfuls of reaction kettles
Methyl esters, 2 parts of acrylic acid, 0.5 part of benzoyl peroxide lead to the air in nitrogen replacement reaction kettle, are heated to 60 DEG C, heat preservation 5 is small
When, add 0.5 part of benzoyl peroxide, then keep the temperature 2 hours, cool down, solvent dilution, discharge polymer is spare.
Take the polymer of the above-mentioned preparation of 100 parts by weight, 25 parts by weight rosin resinoid GB-125 (waste river chemistry manufacture),
10 parts by weight of spherical conductive nickel powder of D50 partial size 0.025mm, 8 parts by weight black pigments, isocyanates crosslinking agent (Cohan wound
Company's manufacture) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28% and contains admittedly
The acrylic pressure sensitive glue of amount is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Embodiment 7
The preparation of substrate
The surface black of soft aluminium foil prints, and is applied using commercially available thermoset polyurethane ink using gravure printing apparatus
When cloth ink, first layer printing first is carried out before aluminium foil coating to the one side of the soft aluminium foil of 0.007mm thickness, electricity is carried out to it
Dizzy processing, after being completed for printing, baking oven drying, heating curing 24 hours obtains the ink layer of 0.001mm thickness, hereafter, with same
Mode printed again on existing ink layer, until ink film thickness reaches 0.003mm, it is standby to obtain black printing aluminium foil
With.
The cast polypropylene aluminium foil that black printing is not yet carried out in embodiment 6 is selected, using Commercial epoxy modified polyurethane
Solvent adhesive is coated with 0.003mm thickness dry glue, fitting is by electricity by slot coated mode on above-mentioned cast polypropylene aluminium foil
The black printing aluminium foil of dizzy processing, it is spare to obtain compound plastics Al foil substrate.
The preparation of conductive adhesive
The preparation of pressure sensitive adhesive polymer: 20 parts of toluene, 50 parts of butyl acrylates, 30 parts of acrylic acid are added in four mouthfuls of reaction kettles
Methyl esters, 2 parts of acrylic acid, 0.5 part of benzoyl peroxide lead to the air in nitrogen replacement reaction kettle, are heated to 60 DEG C, heat preservation 5 is small
When, add 0.5 part of benzoyl peroxide, then keep the temperature 2 hours, cool down, solvent dilution, discharge polymer is spare.
Take the polymer of the above-mentioned preparation of 100 parts by weight, 25 parts by weight rosin resinoid GB-125 (waste river chemistry manufacture),
10 parts by weight of spherical conductive nickel powder of D50 partial size 0.025mm, 8 parts by weight black pigments, isocyanates crosslinking agent (Cohan wound
Company's manufacture) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28% and contains admittedly
The acrylic pressure sensitive glue of amount is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Comparative example 1
The preparation of substrate
Using polyester (diethyl terephthalate) film of 0.012mm thickness, commercially available thermoset polyurethane ink is adopted
With gravure printing apparatus, when being coated with ink, first layer printing first is carried out to the one side of polyester film, after being completed for printing, baking oven dries
Dry, heating curing 24 hours obtains the ink layer of 0.001mm thickness, hereafter, carries out on existing ink layer in the same way
It prints again, until to reach 0.00mm spare for ink film thickness.
Using Commercial epoxy modified polyurethane solvent adhesive, by slot coated mode, in above-mentioned gained black printing polyester
It is coated with 0.003mm thickness dry glue on film, is bonded the soft oil removing annealing aluminium foil Jing Guo sided corona treatment, wherein aluminum foil thickness is
It is spare to obtain compound plastics Al foil substrate by 0.007mm.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid GB-125 (waste river chemistry systems
Make), 10 parts by weight of spherical conductive nickel powder of D50 partial size 0.025mm, 8 parts by weight black pigments, isocyanates crosslinking agent (section
The manufacture of Si Chuan company) 2 parts by weight, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, is prepared 28%
The acrylic pressure sensitive glue of solid content is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Comparative example 2
The preparation of substrate
The surface black of soft aluminium foil prints, and is applied using commercially available thermoset polyurethane ink using gravure printing apparatus
When cloth ink, first layer printing first is carried out before aluminium foil coating to the one side of the soft aluminium foil of 0.007mm thickness, electricity is carried out to it
Dizzy processing, after being completed for printing, baking oven drying, heating curing 24 hours obtains the ink layer of 0.001mm thickness, hereafter, with same
Mode printed again on existing ink layer, until ink film thickness reaches 0.003mm, it is spare to obtain black aluminium foil.
Using the soft aluminium foil of oil removing annealing of 0.007mm thickness, sided corona treatment is carried out to it before coating, using reticulate pattern roller coating
Mode for cloth is coated with polyurethane glue, obtains 0.003mm dry glue thickness, the polyester with 0.012mm thickness after baking oven drying is dry
Film is bonded, and before fitting, for the adhesive property for improving composite glue, polyester film can be carried out to sided corona treatment, fitting winding
It is spare to obtain intermediate product.
Secondary coating is carried out in the polyester film surface for the intermediate product that upper step obtains, before coating, sided corona treatment is carried out to it, is adopted
It is coated with polyurethane glue with anilox roll coating method, 0.00mm dry glue thickness is obtained after baking oven drying is dry, with black aluminium foil
Non-printed side is bonded, and it is spare that winding obtains two substrate of scheme.
The preparation of conductive adhesive
The polymer for taking 100 parts by weight of example 1 to prepare, 25 parts by weight rosin resinoid RE-100L (Ke Teng companies, the U.S.
Manufacture), 10 parts by weight of chain conduction nickel powder of D50 partial size 0.025mm, 7 parts by weight black pigments, isocyanates crosslinking agent
(company's manufacture is created in Cohan) 2 parts by weight, carry out solid content adjustment using solvent, while carrying out high-speed stirred dispersion, are prepared
The acrylic pressure sensitive glue of 28% solid content is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
Comparative example 3
The preparation of substrate
The comparative example uses substrate prepared by embodiment 1.
The preparation of conductive adhesive
Use commercially available high viscous solvent-type acrylic system glue (model: ETERAC 7043, the manufacture of Changxing chemical company), 8 weights
Part black pigment is measured, solid content adjustment is carried out using solvent, while carrying out high-speed stirred dispersion, 28% solid content is prepared
Acrylic pressure sensitive glue is spare.
The preparation of MULTILAYER COMPOSITE electromagnetic shielding film
Using blade coating mode, above-mentioned deployed acrylic pressure sensitive glue is coated on to the composite plastic of above-mentioned preparation
The aluminium foil surface of Al foil substrate before coating, carries out sided corona treatment to aluminium foil and obtains 0.025mm after multilevel drying oven drying
Dry glue film, is bonded release film or release paper obtains finished product.
MULTILAYER COMPOSITE electromagnetic shielding film preparation-obtained in above-described embodiment and comparative example is carried out by test as follows
Performance verification:
1, baige method is tested
According to JIS K5600 standard, 10 are drawn with the interval 1mm on above-mentioned prepared two substrate of one substrate of scheme and scheme
× 10 grids are quickly removed, record is not peeled off after being pasted using adhesive tape (3M, Scotch Tape) with 90 ° of angles
Number of squares, by following standard carry out result judgement.
Zero: 100/100
×: 0~99/100
2, ethanol-tolerant friction testing
Using Friction tester, four layers of non-dust cloth of measuring staff tack packet, bear a heavy burden 500g, number 50 back and forth, speed 1cycle/
1sec, the ink printing surface of two substrate of one substrate of testing scheme and scheme, it is desirable that can not change colour show-through.
3, adhesion strength is tested
It is measured according to ASTM D3330 method, sample cuts into 25mm breadth, 150mm length, 23 DEG C of temperature, humidity
After placing at least 2 hours under the conditions of 50%RH, it is attached at the standard steel plate cleaned up, 2kg is pressing against roller and is pressing against back and forth once,
With peeling force measurement device (Instron type cupping machine, Shimadzu Seisakusho Ltd.), in 180 ° of peel angle, peeling rate
It is removed under conditions of 300mm/min, tests 180 ° of peeling forces, wherein using the average value of N=3 as measured value.
4, retentivity is tested
It is measured according to ASTM D3654 method, sample cuts into 25mm breadth, 150mm length, 23 DEG C of temperature, humidity
After placing at least 2 hours under the conditions of 50%RH, it is attached at the standard steel plate cleaned up, 2kg is pressing against roller and is pressing against back and forth once,
Holding area of attachment is 25mm*25mm, hangs weight 1kg counterweight, and 85 DEG C of * 85% relative humidity baking oven saves 3 days, and whether observation adhesive tape
In the presence of displacement and its shift length.
5, the anti-test that warps of aging
Aging condition 1
Sample cuts into 3mm breadth, 150mm length, and package is attached at LCM mould group frame, and glass side is kept to attach width
For 0.5~1mm, finger pressure is put into 85 DEG C of * 85% phase after standing 1 hour under standard laboratory conditions by tightly after package attaches
It is taken out after being saved 10 days to humidity box, observes the situation that warps of glass side adhesive tape.
Aging condition 2
Sample cuts into 3mm breadth, 150mm length, and package is attached at LCM mould group frame, and glass side is kept to attach width
For 0.5~1mm, it is permanent to be put into programmable constant temperature by tightly for finger pressure after package attaches after standing 1 hour under standard laboratory conditions
Wet baking oven takes out after saving 10 days, and temperature program(me) is set as 85 DEG C of * 30min → subzero 40 DEG C of * 30min, recycles 100 times, observation
The situation that warps of glass side adhesive tape.
6, resistance to residue glue, zonal testing
Sample cuts into 20mm breadth, and 150mm length is attached at glass plate, standard steel plate, aluminium sheet, PC plate, and 2kg is being pressed against
Roller is pressing against once back and forth, and 85 DEG C of * 85% relative humidity baking oven is put into after standing 1 hour under standard laboratory conditions and is saved 10 days
After take out, whether quick stripping tape, observation plate surface has residue glue, while observing adhesive tape with the presence or absence of lamination.
7, testing impedance
Tear sample to be tested off separated type material, glue surface is placed in glue upward, in test copper billet (250 ± 5g) fixture naturally
The numerical value of digital micro-ohm table, as impedance value are read after numerical stability in face.
8, shield effectiveness is tested
It is tested according to ASTM D4935 standard, scan frequency is 30MHz~3GHz, and test condition is high temperature and humidity
(85 DEG C of * 85% relative humidity).
The performance test of product in 1 embodiment of the present invention 1~7 of table and comparative example 1~3
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of electromagnetic shielding composite material, including the plastic film layers, metal foil layer, pressure-sensitive adhesive layer from top to bottom successively contacted
With separated type material layer；
The apparent colour of the electromagnetic shielding composite material is black；
The plastic film layers are cast polypropylene film；The plastic film layers with a thickness of 0.005~0.05mm.
2. electromagnetic shielding composite material according to claim 1, which is characterized in that on the open surface of the plastic film layers
Also successively it is compounded with metal foil layer and black printed layer.
3. electromagnetic shielding composite material according to claim 1 or 2, which is characterized in that the surface of the plastic film layers
Carry out Corona Surface Treatment or plasma surface treatment.
4. electromagnetic shielding composite material according to claim 1 or 2, which is characterized in that the plastic film layers and metal
There are also compound adhesive water layer between layers of foil, the compound adhesive water layer is made of polyurethane glue or polyester glue；
The compound adhesive water layer with a thickness of 0.001~0.01mm.
5. electromagnetic shielding composite material according to claim 1 or 2, which is characterized in that the metal foil layer is aluminium foil layer；
The metal foil layer with a thickness of 0.005~0.05mm.
6. electromagnetic shielding composite material according to claim 1 or 2, which is characterized in that the pressure-sensitive adhesive layer is inner part
The acrylic acid series glue layer for having conducting particles is dissipated,
The pressure-sensitive adhesive layer with a thickness of 0.005~0.1mm.
7. electromagnetic shielding composite material according to claim 6, which is characterized in that the conducting particles be nickel powder, bronze,
One or more of silver powder, conductive black and surface cladding type metal powder；
The shape of the conducting particles is one or more of near-spherical, spherical, chain and sheet；
The partial size of the conducting particles is 0.005~0.1mm.
8. electromagnetic shielding composite material according to claim 6, which is characterized in that the acrylic acid series glue is by acrylic acid
Ester polymer, tackifying resin, additive and crosslinking agent are made；
The weight average molecular weight of the acrylate polymer is 50~1,500,000.
9. a kind of preparation method of electromagnetic shielding composite material, comprising the following steps:
A) in the compound cast polypropylene film of metal foil surface, first base material is obtained；
B) acrylic acid series glue application is bonded separated type material, is electromagnetically shielded in the metal foil surface of the first base material
Composite material.
10. preparation method according to claim 9, which is characterized in that after obtaining the first base material, in first base
The cast polypropylene film surface of material is coated with composite glue, is bonded after dry with the metal foil for being printed with black printed layer,
Obtain the second substrate；
Then the metal foil surface of second substrate is coated with acrylic acid series glue, is bonded separated type material, is electromagnetically shielded
Composite material.
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| CN111138996A (en) * | 2020-01-08 | 2020-05-12 | 福建友谊胶粘带集团有限公司 | Conductive aluminum foil Mylar tape and preparation method thereof |
| CN111363490A (en) * | 2020-04-15 | 2020-07-03 | 苏州环明电子科技有限公司 | Shading type electromagnetic shielding adhesive tape |
| CN113667420A (en) * | 2021-07-26 | 2021-11-19 | 宁波启合新材料科技有限公司 | Electromagnetic shielding single-sided adhesive tape and manufacturing method thereof |
| CN114076732A (en) * | 2021-09-24 | 2022-02-22 | 杭州天丰光电科技股份有限公司 | Incoming material detection process of hidden screen colorful touch film |
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| CN111138996A (en) * | 2020-01-08 | 2020-05-12 | 福建友谊胶粘带集团有限公司 | Conductive aluminum foil Mylar tape and preparation method thereof |
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| CN114076732A (en) * | 2021-09-24 | 2022-02-22 | 杭州天丰光电科技股份有限公司 | Incoming material detection process of hidden screen colorful touch film |
| CN114076732B (en) * | 2021-09-24 | 2024-01-30 | 杭州天丰光电科技股份有限公司 | Incoming material detection process of hidden screen colorful touch film |
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Application publication date: 20190816 |