CN107353777A - It is electromagnetically shielded the preparation method of membrane coat and electromagnetic shielding film - Google Patents
It is electromagnetically shielded the preparation method of membrane coat and electromagnetic shielding film Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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Abstract
A kind of preparation method for being electromagnetically shielded membrane coat and electromagnetic shielding film, belongs to screened film field.The electromagnetic shielding membrane coat includes the following preparing raw material in terms of parts by weight：30~80 parts of resin matrixes, 25~200 parts of solvents, 2~55 parts of mould releases, 0.1~3 part of dispersant and 5~15 parts of curing agent；Wherein mould release includes at least one of polyvinyl alcohol, silicone oil, silicone grease, atoleine, emulsified wax, fluorine element compound, stearic acid.The electromagnetic shielding membrane coat has the advantages of cost is cheap, pliability, tack, separability and strong adaptability.In addition the invention further relates to a kind of preparation method of electromagnetic shielding film.
Description
Technical field
The present invention relates to screened film field, and more particularly to a kind of preparation side for being electromagnetically shielded membrane coat and electromagnetic shielding film
Method.
Background technology
Electromagnetic shielding film is that one kind can stop that electromagnetic wave penetrates, prevents electromagnetic radiation, protection electronic component, anti-electromagnetism from doing
The printing opacity shielding material disturbed, recently as the continuous development of electronic product, the requirement to electromagnetic shielding film is also constantly lifted.
Printed substrate is material indispensable in modern electronic product, and it is widely used in computer, electrical equipment, led to
Interrogate in the electronic product such as equipment, with continuous growth of the people to electronic product demand, for printed circuit board (PCB) demand not yet
It is disconnected to increase., it is necessary to use electromagnetic shielding film in large quantities in the process of FPC, the works such as pressing are now needed to use
Sequence, electromagnetic shielding film is pasted in the circuit board, form the wiring board with PCB characteristics with FPC characteristics, it is therefore necessary to ensure electricity
Magnetic shield film has good pliability, tack and separability, and has good applicability to different differences in height.
The content of the invention
It is an object of the invention to provide one kind be electromagnetically shielded membrane coat, it has, and cost is cheap, pliability, tack,
The advantages of separability and strong adaptability.
Another object of the present invention is to provide a kind of preparation method of electromagnetic shielding film, this method technique is simple, operation
It is convenient, it can make to obtain the good electromagnetic shielding film of pliability, tack, separability.
The present invention is solved its technical problem and realized using following technical scheme.
The present invention proposes a kind of electromagnetic shielding membrane coat, and in terms of parts by weight, its preparing raw material includes：30~80 parts of resins
Matrix, 25~200 parts of solvents, 2~55 parts of mould releases, 0.1~3 part of dispersant and 5~15 parts of curing agent；Wherein mould release bag
Include at least one of polyvinyl alcohol, silicone oil, silicone grease, atoleine, emulsified wax, fluorine element compound, stearic acid.
Further, in present pre-ferred embodiments, matrix resin includes epoxy resin, polyacrylic resin, phenolic aldehyde
At least one of resin, polyester resin, polyamide, polyurethane resin.
Further, in present pre-ferred embodiments, solvent includes at least one of ketone, ester, acid amides.
Further, in present pre-ferred embodiments, dispersant includes hydroxyl polyester, polyethers, polyacrylic acid and poly-
At least one of alkene.
Further, in present pre-ferred embodiments, curing agent includes at least one of acid anhydrides, amine.
Present invention also offers a kind of preparation method of electromagnetic shielding film, comprise the following steps：
In terms of parts by weight, by 30~80 parts of resin matrixes, 25~200 parts of solvents, 2~55 parts of mould releases and 0.1~3
Stirred after part dispersant, be filtrated to get hybrid resin；
Hybrid resin is well mixed to obtain colloid with 5~15 parts of curing agent, will be dried behind surface of the colloid coated on film
Obtain coating；
By coating with screen layer is compound obtains electromagnetic shielding film.
Further, in present pre-ferred embodiments, stirring is 15~60min of stirring under 350~550r/min.
Further, in present pre-ferred embodiments, filtering is sieved using 10~50 μm of screen cloth.
Further, in present pre-ferred embodiments, film is PET film or PBT films.
Further, in present pre-ferred embodiments, the thickness on surface of the colloid coated on film is 2~15 μm.
The beneficial effect of the electromagnetic shielding membrane coat of the embodiment of the present invention and the preparation method of electromagnetic shielding film is：The present invention
The electromagnetic shielding membrane coat of offer includes the following preparing raw material in terms of parts by weight：30~80 parts of resin matrixes, 25~200 parts
Solvent, 2~55 parts of mould releases, 0.1~3 part of dispersant and 5~15 parts of curing agent, and mould release include polyvinyl alcohol, silicone oil,
At least one of silicone grease, atoleine, emulsified wax, fluorine element compound, stearic acid.The electromagnetic shielding membrane coat has cost
It is cheap, the advantages of pliability, tack, separability and strong adaptability.In addition the invention further relates to a kind of electromagnetic shielding film
Preparation method, the good electromagnetic shielding membrane coat of pliability can be prepared in the preparation method, and simple and reliable process, cost are low
It is honest and clean, it is adapted to commercial introduction application.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described.Unreceipted actual conditions person, builds according to normal condition or manufacturer in embodiment
The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, it is the conventional production that can be obtained by commercially available purchase
Product.
The preparation method of the electromagnetic shielding membrane coat to the embodiment of the present invention and electromagnetic shielding film is specifically described below.
The embodiments of the invention provide one kind to be electromagnetically shielded membrane coat, and in terms of parts by weight, its preparing raw material includes：30~
80 parts of resin matrixes, 25~200 parts of solvents, 2~55 parts of mould releases, 0.1~3 part of dispersant and 5~15 parts of curing agent；Its
In, mould release includes at least one in polyvinyl alcohol, silicone oil, silicone grease, atoleine, emulsified wax, fluorine element compound, stearic acid
Kind.Matrix resin is preferably using epoxy resin, polyacrylic resin, phenolic resin, polyester resin, polyamide, polyurethane
At least one of resin；Solvent is preferably using at least one of ketone, ester, acid amides；Dispersant preferably uses hydroxyl polyester, gathers
Ether, at least one of polyacrylic acid and polyolefin；Curing agent is preferably using at least one of acid anhydrides, amine.
Electromagnetic shielding membrane coat provided in an embodiment of the present invention is by resin matrix, solvent, mould release, dispersant and solidification
Agent is prepared, uniformly solid using curing agent crosslinking afterwards with solvent, mould release and dispersant using resin matrix as carrier
Change, obtained electromagnetic shielding membrane coat has the advantages of cost is cheap, pliability, tack, separability and strong adaptability.
Wherein, resin matrix plays carrier function, and resin matrix is used cooperatively to be formed with curing agent to be had well
Physics, chemical property and constitutionally stable carrier, and the carrier has excellent adhesive property, hardness and good pliability.
Resin matrix is preferably using epoxy resin, polyacrylic resin, phenolic resin, polyester resin, polyamide, polyurethane resin
At least one of, epoxy resin is the chemical combination containing the larger epoxide group composition of two or more activity in molecule
Thing, it can crosslink reaction with polytype curing agent and form the insoluble high polymer with three-dimensional network structure,
So as to have higher pliability, structural strength and elastic performance；Polyacrylic resin is by esters of acrylic acid and metering system
Esters of gallic acid and other olefinic type monomers are copolymerized the resin to be formed, and the active function groups for going to have can be with other amino resins, ring
Functional group reactionses in the resin materials such as oxygen tree fat, polyurethane form network structure, excellent physico so as to be that carrier has
Performance is learned, not only there is higher hardness and solvent resistance, also with good light resistance and ageing resistace；Phenolic resin
With very strong structural stability, adhesive property and heat resistance, when in use with being formed after itself or other resin crosslinks
Network structure has extremely strong anti-chemical stability, mechanical strength and wetability；Polyester resin is to contain-CH=CH- in main chain
A kind of linear macromolecule polyester resin of double bond, it has, and curing rate is fast, and hardness is big, the transparency is good, brightness is high, heat resistance
The advantages of strong；Polyamide has excellent mechanical property, heat resistance, wear resistance, chemical-resistance and self lubricity；It is poly-
Urethane resin is the polymer for containing-NHCOO- constitutional repeating units in main chain, and it has good oil resistivity, toughness, wear-resisting
Property, resistance to ag(e)ing and cohesive.
Curing agent is used to be used cooperatively with above-mentioned resin matrix, can promote resin matrix condensation, closed loop, addition or urge
Change reaction curing molding.Curing agent is preferably using at least one of acid anhydrides, amine, and wherein acid anhydride type curing agent includes O-phthalic
Acid anhydrides, HHPA, trimellitic anhydride, aliphatic anhydride etc., anhydride curing agent have higher to organic acid and inorganic acid
Resistance, and there is good electrical property.Amine curing agent includes ethylenediamine, diethylenetriamine, triethylene tetramine, diethylin
The fatty amines such as propylamine, trimethylhexamethylenediamine curing agent and m-phenylene diamine (MPD), diaminodiphenyl-methane, diaminourea two
The aromatic amine curing agents such as phenylsulfone, benzidine, the adhesive property of fatty amines solidfied material and alkaline-resisting, water resistance are very
Excellent, aromatic polyamine then has preferable chemical-resistance.
Solvent is used for the adhesive property for improving electromagnetic shielding membrane coat, and solvent selects at least one of ketone, ester, acid amides,
Wherein ketone includes acetone, butanone, cyclohexanone etc., and ester is from propylene glycol methyl ether acetate, 3- ethoxyl ethyl propionates, metering system
Acid glycidyl ester etc., acid amides is from acetamide, phosphoamide, dimethylformamide etc.；Above-mentioned solvent can effectively improve electricity
The mobility and adhesive property of magnetic shield film coating, electromagnetic shielding membrane coat is set uniformly to coat to the surface of base material.
Mould release be used for improve electromagnetic shielding membrane coat interior greasy property, avoid be electromagnetically shielded membrane coat shaping when and mould
Tool bonding is difficult to separate, and is separated and is adjusted during convenient use.Mould release is from polyvinyl alcohol, silicone oil, silicone grease, liquid stone
At least one of wax, emulsified wax, fluorine element compound, stearic acid.Above-mentioned mould release has good film-forming property, to resin matrix
Adhesiveness is low and the advantages that hardening time is short.
Dispersant is used to make each component in electromagnetic shielding membrane coat sufficiently be well mixed.Dispersant preferably uses hydroxyl
Polyester, polyethers, at least one of polyacrylic acid and polyolefin.Wherein hydroxyl polyester has wear-resisting, organic solvent-resistant and resisted
The advantages of light capabilities are strong；Polyethers has that mobility is strong, lubricity is good, oil-soluble is strong, heat endurance and oxidation resistance be strong
Advantage；Polyacrylic acid has preferable dispersion effect for amorphous substance；Polyolefin has impact strength, flex stiffiness good
With corrosion resistance it is strong the advantages of.
Present invention also offers a kind of preparation method of electromagnetic shielding film, comprise the following steps：
S1, in terms of parts by weight, by 30~80 parts of resin matrixes, 25~200 parts of solvents, 2~55 parts of mould releases and 0.1
15~60min is stirred under 350~550r/min to stir, and use 10~50 μm of screen cloth after~3 parts of dispersants
Carry out screening and be filtrated to get hybrid resin；
S2, hybrid resin is well mixed to obtain colloid with 5~15 parts of curing agent, will be dried behind surface of the colloid coated on film
It is dry to obtain coating.Wherein film is preferably PET film or PBT films, and the thickness on surface of the colloid coated on film is 2~15 μm.
S3, obtain electromagnetic shielding film by coating and screen layer are compound.
The preparation method of electromagnetic shielding film provided in an embodiment of the present invention is using resin matrix, solvent, mould release and divides
High-speed stirred after powder is well mixed, makes each component fully dispersed and is well mixed, and then screening removes big in hybrid resin
Curing agent condensation, crosslinking curing are added after particles cured thing, and obtained colloid is coated uniformly on to the surface of PET or PBT films,
So as to obtain good pliability, tack and separability is strong and adaptability is good electromagnetic shielding membrane coat, by the electromagnetic shielding film
It is that screened film is prepared that coating is compound with screen layer, and the preparation method technique of the electromagnetic shielding film is simple, easy to operate, uses
Person can be produced on a large scale.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S101, in terms of parts by weight, by 25kg polyacrylic resins, 35kg polyurethane resins, 50kg butanone, 100kg second
Stirred after acid amides, 15kg polyvinyl alcohol, 25kg atoleines, 1.5kg hydroxyl polyesters and the mixing of 1.5kg polyethers under 400r/min
Mix 30min to stir, and carry out screening using 20 μm of screen cloth and be filtrated to get hybrid resin；
S102, hybrid resin is well mixed to obtain colloid with 10kg phthalic anhydrides, by colloid coated on PBT films
Drying obtains coating behind surface, and the thickness on surface of the colloid coated on film is 15 μm；
S103, obtain electromagnetic shielding film by coating and screen layer are compound.
Embodiment 2
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S201, in terms of parts by weight, by 30kg epoxy resin, 30kg phenolic resin, 80kg propylene glycol methyl ether acetates,
In 480r/ after 70kg dimethylformamides, 20kg polyvinyl alcohol, 20kg atoleines, 1kg polyethers and the mixing of 1kg polyolefin
45min is stirred under min to stir, and is carried out screening using 20 μm of screen cloth and be filtrated to get hybrid resin；
S202, hybrid resin is well mixed to obtain colloid with 10kg ethylenediamines, behind surface of the colloid coated on PET film
Drying obtains coating, and the thickness on surface of the colloid coated on film is 10 μm；
S203, obtain electromagnetic shielding film by coating and screen layer are compound.
Embodiment 3
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S301, in terms of parts by weight, by 20kg epoxy resin, 20kg phenolic resin, 20kg polyamides, 50kg third
25min is stirred under 550r/min to stir, and use after ketone, 50kg butanone, 75kg phosphoamides and the mixing of 1kg polyolefin
10 μm of screen cloth carries out screening and is filtrated to get hybrid resin；
S302, hybrid resin is well mixed to obtain colloid with 5kg phthalic anhydrides, 5kg diethylenetriamines, by colloid
Drying obtains coating behind surface coated on PET film, and the thickness on surface of the colloid coated on film is 5 μm；
S303, obtain electromagnetic shielding film by coating and screen layer are compound.
Embodiment 4
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S401, in terms of parts by weight, by 15kg polyacrylic resins, 15kg polyester resin, 15kg polyamides, 15kg
Polyurethane resin, 50kg acetone, 50kg GMAs, 50kg dimethylformamides acid amides, 15kg polyethylene
After alcohol, 15kg silicone oil, 15kg stearic acid, 1kg hydroxyl polyesters, 1kg polyethers and the mixing of 0.5kg polyacrylic acid under 450r/min
Stirring 40min stirs, and carries out screening using 30 μm of screen cloth and be filtrated to get hybrid resin；
S402, hybrid resin mixed with 5kg diaminodiphenyl-methanes, 5kg m-phenylene diamine (MPD)s, 5kg trimellitic anhydrides
Colloid uniformly is obtained, drying behind surface of the colloid coated on PET film is obtained into coating, the thickness on surface of the colloid coated on film is
10μm；
S403, obtain electromagnetic shielding film by coating and screen layer are compound.
Embodiment 5
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S501, in terms of parts by weight, by 30kg epoxy resin, 20kg polyamides, 20kg polyurethane resins, 50kg rings
Hexanone, 50kg3- ethoxyl ethyl propionates, 50kg acetamides, 15kg polyvinyl alcohol, 20kg tetrafluoroethene, 15kg stearic acid, 1kg
45min is stirred under 420r/min to stir, and carried out using 30 μm of screen cloth after hydroxyl polyester and the mixing of 1kg polyolefin
Screening is filtrated to get hybrid resin；
S502, hybrid resin is well mixed to obtain colloid with 5kg HHPAs, 5kg benzidine, colloid is coated on
Drying obtains coating behind the surface of PBT films, and the thickness on surface of the colloid coated on film is 12 μm；
S503, obtain electromagnetic shielding film by coating and screen layer are compound.
Embodiment 6
A kind of electromagnetic shielding film is present embodiments provided, its preparation method is as follows：
S601, in terms of parts by weight, by 30kg polyacrylic resins, 20kg polyamides, 20kg polyurethane resins,
100kg butanone, 50kg propylene glycol methyl ether acetates, 10kg silicone grease, 20kg emulsified waxes, 20kg stearic acid, 1kg hydroxyl polyesters with
And stir 60min under 350r/min after the mixing of 2kg polyethers and stir, and carry out screening using 40 μm of screen cloth and be filtrated to get
Hybrid resin；
S602, hybrid resin is well mixed to obtain colloid with 5kg diethyl amino propylamines, 5kg diaminodiphenyl-methanes,
Drying behind surface of the colloid coated on PBT films is obtained into coating, the thickness on surface of the colloid coated on film is 15 μm；
S603, obtain electromagnetic shielding film by coating and screen layer are compound.
The electromagnetic shielding provided the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6
Film carries out performance detection.
From above-mentioned testing result, electromagnetic shielding film provided in an embodiment of the present invention has that pliability is good, corrosion resistance
With heat-resisting ability it is strong the advantages of, while it has higher off-type force and peel strength, disclosure satisfy that the demand of each side.
Embodiments described above is part of the embodiment of the present invention, rather than whole embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Claims (10)
1. one kind electromagnetic shielding membrane coat, it is characterised in that in terms of parts by weight, its preparing raw material includes：
Wherein, the mould release includes polyvinyl alcohol, silicone oil, silicone grease, atoleine, emulsified wax, fluorine element compound, stearic acid
At least one of.
2. electromagnetic shielding membrane coat according to claim 1, it is characterised in that described matrix resin include epoxy resin,
At least one of polyacrylic resin, phenolic resin, polyester resin, polyamide, polyurethane resin.
3. electromagnetic shielding membrane coat according to claim 1, it is characterised in that the solvent is included in ketone, ester, acid amides
It is at least one.
4. electromagnetic shielding membrane coat according to claim 1, it is characterised in that the dispersant includes hydroxyl polyester, gathers
Ether, at least one of polyacrylic acid and polyolefin.
5. electromagnetic shielding membrane coat according to claim 1, it is characterised in that the curing agent is included in acid anhydrides, amine
It is at least one.
6. a kind of preparation method of electromagnetic shielding film, it is characterised in that comprise the following steps：
In terms of parts by weight, by 30~80 parts of resin matrixes, 25~200 parts of solvents, 2~55 parts of mould releases and 0.1~3 part point
Stirred after powder mixing, be filtrated to get hybrid resin；
The hybrid resin is well mixed to obtain colloid with 5~15 parts of curing agent, behind surface of the colloid coated on film
Drying obtains coating；
By coating with screen layer is compound obtains electromagnetic shielding film.
7. the preparation method of electromagnetic shielding film according to claim 6, it is characterised in that the stirring be 350~
15~60min is stirred under 550r/min.
8. the preparation method of electromagnetic shielding film according to claim 6, it is characterised in that the filtering is to use 10~50
μm screen cloth sieved.
9. the preparation method of electromagnetic shielding film according to claim 6, it is characterised in that the film is PET film or PBT
Film.
10. the preparation method of electromagnetic shielding film according to claim 6, it is characterised in that the colloid is coated on described
The thickness on the surface of film is 2~15 μm.
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| CN109706784A (en) * | 2018-11-30 | 2019-05-03 | 上海盈实纸塑材料有限公司 | A kind of release paper new waterproof radiation protection mould release and preparation method thereof |
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