CN109825204A - A kind of coloured ultra-thin cover film of high shielding and preparation method - Google Patents
A kind of coloured ultra-thin cover film of high shielding and preparation method Download PDFInfo
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Abstract
The invention discloses a kind of coloured ultra-thin cover film of high shielding and preparation method, cover film includes pigmented ink layer and coloured adhesion agent layer, and the sum of thickness of the two is 4-35 μm, and pigmented ink layer with a thickness of 1-10 μm；Coloured adhesion agent layer with a thickness of 3-25 μm；The light transmittance of cover film is 0.2-12.3%；Coloured adhesion agent layer includes pigment and resin material；Pigment occupies the 2-50% of the total solid content of color adhesion agent layer, and resin material accounts for the 40-90% of the total solid content of the coloured adhesion agent layer；Pigmented ink layer includes pigment and resin material, and pigment accounts for the 2-50% of the total solid content of the pigmented ink layer.Cover film of the invention has high shielding to prevent circuit design from being plagiarized, also there is splendid ion transport simultaneously, high ionic purity, good adhesion, low bounce-back power, high flexibility, can low-temperature processability, high-cooling property, high flame retardant, high rigidity and low cost, and be functionally able to satisfy High Density Packaging and ultra fine-line demand.
Description
Technical field
The present invention relates to FPC (flexible circuit board) to use cover film and its preparation technical field, in particular to a kind of high masking
The coloured ultra-thin cover film of property and preparation method.
Background technique
Because of market electronic product light and thin type, when Very Important Person produces FPC multi-layer board, needed to reduce soft board material thickness
It asks, its production requirement of client designs ultra-thin cover film product.Common black covering film is sub- using black polyamides on the market
Amine film, its bottleneck is that black polyamide film makes 5 μm of thickness below with great difficulty in the design of slimming
And process operation is bad, using the solid of epoxy resin, its ionic purity is bad, electrically bad, with high costs, these
All make it difficult to cope with the trend of current superfine wire route and high-frequency high-speed transmission.
In industrial design, in order to which circuit design is not exposed, the requirement of beautiful, vision protection etc., for extra-thin
Covering film (Kapton thickness≤7.5 μm) has demand, however black polyamide manufacturer is mainly on the market
The tape casting technique is in order to reduce film thickness, and when being thinned 5-7.5 μm of thickness design, general technology index is unable to reach industry
The requirement of specification.Such as the TaiWan, China patent No. " TW201132714 A1 " disclose a kind of doped ceramics powder low gloss it is black
Color Kapton, the TaiWan, China patent No. " TW1481646 B " disclose a kind of low gloss of adulterated powder polyimides
Kapton, Korea S's patent No. " 10-2012-0036253 " disclose a kind of black polyamide thin film of carbon-black doped,
5-7.5 μm of ultra-thin polyimide film is not easily achieved in above-mentioned patent.
In addition, the present invention has continued Chinese invention application: the coloured ultra-thin high frequency cover film and preparation method of haze, in
State's number of patent application 201710365861.3, it is a kind of extinction type release layer, surface which, which discloses by upper release layer,
It is more easily separated with release layer that roughness (Rz) at 0.2-10 μm, through this form can make pigmented ink layer, to substantially increase
Downstream endpoint operability, at the same the extinction type release layer make cover film it is fast it is molded after, tear release layer off, facilitate coloured oil
Layer of ink configuration of surface is delustring form.Then pigmented ink layer surface morphology can be prepared with extinction type according to customer demand
(glossiness 0-30%/60 °) or non-extinction type (glossiness 30-100%/60 °).However, though the invention solves black polyamides
Imines make 5 μm of thickness below with great difficulty and process operation it is bad, and using epoxy resin solid its
The problems such as ionic purity is bad, electrical property is bad, with high costs, at it with extremely low dielectric constant and loss, high ion
Purity, ultra-thin folded structure thickness, high-cooling property, high flame retardant, high racemization photosensitiveness are particularly suitable for making in high frequency graph thinning route
With, but after dyeing, color homogeneity is poor for times right existing defects, especially its pigmented ink layer in terms of volume production, is easy light transmission,
I.e. its shielding is undesirable, and processing procedure is difficult, and high rejection rate is not easy mass production.
Summary of the invention
For the design of the graph thinning route of the electronic products such as current mobile phone and computer, and the height for reaching customer requirement hides
Covering property must also meet splendid ion transport to prevent circuit design from being plagiarized, high ionic purity, it is good then
Power, low bounce-back power, high flexibility, can low-temperature processability, high-cooling property, high flame retardant, the developing direction of high rigidity and low cost,
And it is functionally able to satisfy High Density Packaging and ultra fine-line demand, the present invention provides a kind of high shielding ultra-thin colors
Cover film.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: the present invention provides a kind of high maskings
Property ultra-thin color cover film, including pigmented ink layer and coloured adhesion agent layer, the pigmented ink layer be located at it is described it is coloured then
The top of oxidant layer, the pigmented ink layer are equipped at least one layer；
The sum of thickness of both the pigmented ink layer and the coloured adhesion agent layer is 4-35 μm, wherein described coloured
Ink layer with a thickness of 1-10 μm；The coloured adhesion agent layer with a thickness of 3-25 μm；
The light transmittance of the cover film is 0.2-12.3%；
The coloured adhesion agent layer includes pigment and resin material；The pigment accounts for always containing admittedly for the coloured adhesion agent layer
The 2-50% (weight percentage) of amount, the resin material account for the 40-90% (weight of the total solid content of the coloured adhesion agent layer
Measure percentage composition)；
The pigmented ink layer includes pigment and resin material, and the pigment accounts for the total solid content of the pigmented ink layer
2-50% (weight percentage).
It further says, the sum of thickness of both the color ink layer and described coloured adhesion agent layer is down to 4-7 μm.
Preferably, the pigmented ink layer with a thickness of 1-3 μm, the coloured adhesion agent layer with a thickness of 3-10 μm.
It further says, the coloured adhesion agent layer refers to that Dk value is that 2.4-10.0, Df value are 0.002-0.080, absorb water
Rate insulation impedance between 0.03-3%, line is greater than 108Ω, sheet resistance are greater than 1012Ω and volume resistance are greater than 1014Ω˙cm
Glue-line.
It further says, the pigment includes inorganic pigment or organic pigment；
Wherein, the inorganic pigment is cadmium red, cadmium lemon yellow, tangerine cadmium yellow, titanium dioxide, carbon black, black iron oxide or black
Color complex compound；
The organic pigment is nigrosine, black, anthraquinone is black, diphenyl amine yellow uitramarine, phthalocyanine blue or dark green.
It further says, the pigmented ink layer further includes in inorganic particle, organic powder and tool fire-retardant compound
At least one, the inorganic particle include calcium sulfate, silica, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, hydroxide
At least one of aluminium, aluminium oxide, talcum powder, aluminium nitride, glass powder, quartzy powder, diamond dust and clay, the organic powder
For polyimides system, the tool fire-retardant compound includes containing at least one of halogen, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio are total for pigmented ink layer
The ratio of the 1-50% (weight percent) of solid content, the tool fire-retardant compound of phosphorous system are pigmented ink layer total solid content
1-40% (weight percent).
Preferably, when more demanding hardness, the preferred silica of powder in the pigmented ink layer is higher when considering
Flame resistance when, preferably aluminium hydroxide, aluminium oxide, calcium carbonate, phosphorous system tool anti-flammability compound, it is halogen-containing tool it is fire-retardant
At least one of the compound of property, the compound of nitrogenous tool anti-flammability and compound of tool anti-flammability of boracic system, and one
As, the content of powder is higher, and flame resistance is better.
It further says, the coloured adhesion agent layer further includes in inorganic particle, organic powder and tool fire-retardant compound
At least one, the inorganic particle includes calcium sulfate, silica, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, hydroxide
At least one of aluminium, aluminium oxide, talcum powder, aluminium nitride, glass powder, quartzy powder, diamond dust and clay, the organic powder
For polyimides system, the tool fire-retardant compound includes containing at least one of halogen, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio are coloured adhesion agent layer
The 1-50% (weight percent) of total solid content, the ratio of the tool fire-retardant compound of phosphorous system are that coloured adhesion agent layer always contains admittedly
The 1-50% (weight percent) of amount.
It further says, the pigmented ink layer is equipped with two layers, and respectively the first pigmented ink layer and the second coloured oil
Layer of ink, first pigmented ink layer are located at the upper surface of second pigmented ink layer, and second pigmented ink layer is located at
The upper surface of the coloured adhesion agent layer；
The thickness of first pigmented ink layer and second pigmented ink layer is all 2-3 μm.
It further says, further includes auxiliary following layer, the auxiliary following layer is located at the pigmented ink layer and described has
Between color adhesion agent layer, and it is described auxiliary following layer with a thickness of 3-25 μm.
It further says, further includes release layer, the release layer includes upper release layer and lower release layer, the upper release layer
For delustring release film layer, and the one side that contacts with the pigmented ink layer of the delustring release film layer is rough surface and Rz value is
0.1-10μm。
It further says, the upper release layer and the lower release layer can also be release paper.
It further says, the surface hardness of pigmented ink layer is 2H-5H.
It further says, the resin material is epoxy resin, acrylic resin, carbamate system resin, silicon rubber
Glue system resin gathers in ring diformazan benzene series resin, bismaleimide amine system resin, polyimides system resins and polyamidoimide
At least one.
It further says, the resin material in the upper release layer and the lower release layer is polypropylene, biaxial tension is poly-
At least one of propylene and polyethylene terephthalate.
The present invention also provides the preparation methods of the coloured ultra-thin cover film of high shielding described in one kind, in accordance with the following steps
It carries out:
Step 1: being coated with colored ink raw material in the lower surface of upper release layer, 50-180 DEG C of curing at low temperatures forms coloured
Ink layer；
Step 2: coloured adhesion agent layer to be formed in the lower surface of pigmented ink layer by rubbing method or transfer printing；
Step 3: lower release layer is covered on the lower surface of coloured adhesion agent layer to get finished product.
The beneficial effects of the present invention are: the present invention has at least the following advantages:
One, the present invention arranges in pairs or groups pigmented ink layer coloured adhesion agent layer, and the pigment added in its coloured adhesion agent layer
The 2-50% (weight percentage) for occupying the total solid content of color adhesion agent layer makes cover film to adjust the light transmittance of cover film
Light transmittance reach 0.2-12.3%, light transmittance is extremely low, that is, covers that shielding is fabulous, therefore cover film of the invention has and preferably hides
Covering property；The coloured ultra-thin high frequency cover film for the haze mentioned in another background technique, electrical property is good, but its pigmented ink layer is through contaminating
After color, color homogeneity is poor, is easy light transmission, i.e. its shielding is undesirable, and processing procedure is difficult, and high rejection rate is not easy mass production, and
Cover film of the invention overcomes pigmented ink layer color uniformly poor completely by adding coloured pigment into pigmented ink layer
Problem is not easy light transmission, and shielding is high, and processing procedure is easy, high yield rate, mass production easy to accomplish；
Two, inorganic particle, organic powder and tool can all be contained in pigmented ink layer of the invention and coloured adhesion agent layer
At least one of fire-retardant compound, and the sum of silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio
For the 1-50% of pigmented ink layer total solid content, the ratio of the tool anti-flammability chemical combination of phosphorous system is pigmented ink layer total solid content
1-40%, the sum of silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio always contain admittedly for coloured adhesion agent layer
The 1-50% of amount, the ratio of the tool anti-flammability chemical combination of phosphorous system are the 1-50% of coloured adhesion agent layer total solid content, and formula is reasonable,
So that it is met splendid ion transport, high ionic purity, good adhesion, low bounce-back power, high flexibility, can low temperature process
Property, high-cooling property, high flame retardant；
Three, the sum of thickness of both pigmented ink layer of the present invention and coloured adhesion agent layer is minimum up to 4-7 μm, ultra-thin, full
The design requirement of the current FPC graph thinning route of foot, adapts to the requirement of forth generation electronic product；
If four, have higher hardness, mechanical strength and interlayer then force request when, the present invention can pigmented ink layer with
Between coloured adhesion agent layer increase auxiliary following layer, auxiliary following layer with a thickness of 3-25 μm, colored ink can be effectively increased
The adhesion of layer and coloured adhesion agent layer improves product integral hardness and mechanical strength；
Five, by the way of the present invention can be using the double-deck coating ink, i.e., pigmented ink layer include the first pigmented ink layer with
Second two layers of pigmented ink layer ink layer is able to solve micropore problem existing for coating process, improves processing procedure yields；
Six, powder is added in pigmented ink layer of the invention, hardness 2H-5H, therefore, the present invention not only have cloudy surface special
Property, and its high rigidity can prevent surface scratches, and be not easy by the chemical reagent corrosion in the processing procedure of downstream, and weatherability is good；Separately
Due to, mixed with pigment, guaranteeing the shielding of cover film enough in coloured adhesion agent layer, therefore can guarantee the high shielding of cover film
In the case where, by adjusting the content of the powder in pigmented ink layer, the cover film of mist degree required for obtaining；
Seven, colored ink layer surface of the invention uses delustring release film layer, and surface Rz (roughness) is 0.1-10 μ
M keeps the pigmented ink layer of cover film and release layer more easily separated through this form, so that substantially increasing downstream endpoint can operate
Property, at the same the delustring release film layer make cover film it is fast it is molded after, after tearing release film layer off, facilitate colored ink layer surface shape
State is delustring form；
Eight, the present invention has lower bounce, is suitble to downstream High Density Packaging processing procedure.
Above description of the invention is only the general introduction of technical solution of the present invention, in order to better understand skill of the invention
Art means, and being implemented in accordance with the contents of the specification with presently preferred embodiments of the present invention and cooperate attached drawing specifically below
It is bright as after.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention (one layer of pigmented ink layer)；
Fig. 2 is a kind of structural schematic diagram of the invention (two layers of pigmented ink layer)；
Fig. 3 is another structural schematic diagram (following layer containing auxiliary) of the invention；
Each section label is as follows in attached drawing:
The upper release layer of 100-, 200- pigmented ink layer, the first pigmented ink layer of 201-, the second pigmented ink layer of 202-,
Release layer and 500- assist following layer under the coloured adhesion agent layer of 300-, 400-.
Specific embodiment
Illustrate a specific embodiment of the invention below by way of particular specific embodiment, those skilled in the art can be by this
The revealed content of specification understands advantages of the present invention and effect easily.The present invention can also give in further, different ways
Implement, that is, under the scope of without departing substantially from disclosed, different modification and change can be given.
It is thinned film bottleneck in order to solve above-mentioned black polyamide manufacturer, it will be by coloured polyimides cover film
It is substituted for the coloured ultra-thin cover film of pigmented ink layer Yu coloured solid composition.Wherein pigmented ink layer can be set by changing
The methods of ester or adulterated powder, and by powder content ratio improve, partial size design etc., obtain high flame retardant, macroion purity,
The ink layer of a variety of advantages such as high rigidity.Wherein coloured solid can also add the methods of powder by improvement resin type,
Also by differences such as powder content ratio, powder type, partial size designs, a variety of advantages such as high flame retardant, macroion purity are obtained
Solid.Coloured ultra-thin cover film obtained have splendid ion transport, excellent adhesion, low bounce-back power, high flexibility,
Can the characteristics such as low temperature process, high-cooling property, high rigidity, splendid heat resistance, dimensional stability and superior electrical performance, this secondary design
It is to reach the effect of high shielding using coloured ultra-thin ink layer and coloured solid composition, is particularly suitable for current line width line-spacing
It is used in the ultra fine-line route of High Density Packaging lower than 35/35 micron.In addition in mobile phone and computer heat dissipation performance at
For the application such as great index, such as wireless charging field, the present invention is due to ultra-thin cover film design therefore also dissipates with splendid
It is hot.
Embodiment one: a kind of high coloured ultra-thin cover film of shielding, as shown in Figure 1, including pigmented ink layer 200 and having
Color adhesion agent layer 300, the pigmented ink layer are located at the top of the coloured adhesion agent layer, and the pigmented ink layer is equipped at least
One layer；
The sum of the thickness of 300 the two of the pigmented ink layer 200 and the coloured adhesion agent layer is 4-35 μm, wherein institute
State pigmented ink layer with a thickness of 1-10 μm；The coloured adhesion agent layer with a thickness of 3-25 μm；
The light transmittance of the cover film is 0.2-12.3%；
The coloured adhesion agent layer 300 includes pigment and resin material；The pigment accounts for the total of the coloured adhesion agent layer
The 2-50% (weight percentage) of solid content, the resin material account for the 40- of the total solid content of the coloured adhesion agent layer
90% (weight percentage)；
The pigmented ink layer 200 includes pigment and resin material, and the pigment accounts for always containing admittedly for the pigmented ink layer
The 2-50% (weight percentage) of amount.
In present embodiment, pigmented ink layer has single layer, and the pigmented ink layer 200 and the coloured adhesion agent layer
The sum of both 300 thickness is 4-35 μm.
The hardness of the pigmented ink layer 200 is 2H-5H.
Preferably, the sum of thickness of both the color ink layer and described coloured adhesion agent layer is down to 4-7 μm.
It is preferred that the pigmented ink layer with a thickness of 1-3 μm, the coloured adhesion agent layer with a thickness of 3-10 μm.
The coloured adhesion agent layer refer to Dk value be 2.4-10.0, Df value be 0.002-0.080, water absorption rate is between 0.03-
3%, insulation impedance is greater than 10 between line8Ω, sheet resistance are greater than 1012Ω and volume resistance are greater than 1014The glue-line of Ω ˙ cm.
The pigment includes inorganic pigment or organic pigment；
Wherein, the inorganic pigment is cadmium red, cadmium lemon yellow, tangerine cadmium yellow, titanium dioxide, carbon black, black iron oxide or black
Color complex compound；
The organic pigment is nigrosine, black, anthraquinone is black, diphenyl amine yellow uitramarine, phthalocyanine blue or dark green.
Preferably black pigment (carbon black, black iron oxide, black complex, nigrosine, black or anthraquinone are black) and
White pigment (titanium dioxide), but not limited to this, or the pigment of other colors.
The pigmented ink layer further includes at least one of inorganic particle, organic powder and tool fire-retardant compound, institute
Stating inorganic particle includes calcium sulfate, silica, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, aluminium hydroxide, aluminium oxide, cunning
At least one of mountain flour, aluminium nitride, glass powder, quartzy powder, diamond dust and clay, the organic powder is polyimides
System, the tool fire-retardant compound include containing at least one of halogen, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio are total for pigmented ink layer
The ratio of the 1-50% (weight percent) of solid content, the tool fire-retardant compound of phosphorous system are pigmented ink layer total solid content
1-40% (weight percent).
Preferably, when more demanding hardness, the preferred silica of powder in the pigmented ink layer is higher when considering
Flame resistance when, preferably aluminium hydroxide, aluminium oxide, calcium carbonate, phosphorous system tool anti-flammability compound, it is halogen-containing tool it is fire-retardant
At least one of the compound of property, the compound of nitrogenous tool anti-flammability and compound of tool anti-flammability of boracic system, and one
As, the content of powder is higher, and flame resistance is better.
The coloured adhesion agent layer further includes inorganic particle, organic powder and tool at least one of fire-retardant compound,
The inorganic particle include calcium sulfate, silica, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, aluminium hydroxide, aluminium oxide,
At least one of talcum powder, aluminium nitride, glass powder, quartzy powder, diamond dust and clay, the organic powder is polyimides
System, the tool fire-retardant compound include containing at least one of halogen, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio are coloured adhesion agent layer
The 1-50% (weight percent) of total solid content, the ratio of the tool fire-retardant compound of phosphorous system are that coloured adhesion agent layer always contains admittedly
The 1-50% (weight percent) of amount.
It further include release layer, the release layer includes upper release layer 100 and lower release layer 400, and the upper release layer is to disappear
Light release film layer, and the one side that contacts with the pigmented ink layer of the delustring release film layer is rough surface and Rz value is 0.1-10
μm。
The upper release layer and the lower release layer can also be release paper.
The resin material is epoxy resin, acrylic resin, carbamate system resin, silicon rubber system resin, gathers
To at least one of ring diformazan benzene series resin, bismaleimide amine system resin, polyimides system resins and polyamidoimide.
Resin material in the upper release layer and the lower release layer is polypropylene, Biaxially oriented polypropylene and gathers to benzene
At least one of naphthalate.
Embodiment two: as shown in Fig. 2, it is other identical as embodiment one, the difference is that: the pigmented ink layer
Equipped with two layers, and respectively the first pigmented ink layer 201 and the second pigmented ink layer 202, first pigmented ink layer 201
In the upper surface of second pigmented ink layer 202, second pigmented ink layer 202 is located at the coloured adhesion agent layer 300
Upper surface；
The thickness of first pigmented ink layer 201 and second pigmented ink layer 202 is all 2-3 μm.
Embodiment three: as shown in figure 3, it is other identical as embodiment one, the difference is that: the coloured ultra-thin height
Frequency cover film further includes auxiliary following layer 500, and the auxiliary following layer 500 is located at the pigmented ink layer 200 and described coloured
Between adhesion agent layer 300, and it is described auxiliary following layer 500 with a thickness of 3-25 μm.
The present invention also provides the preparation method of the coloured ultra-thin cover film of high shielding described in one kind, the preparation methods
For one of following method:
Method one (is suitable for way of example one and way of example two): it carries out in accordance with the following steps:
Step 1: being coated with colored ink raw material in the lower surface of upper release layer, 50-180 DEG C of curing at low temperatures forms coloured
Ink layer；
Step 2: coloured adhesion agent layer to be formed in the lower surface of pigmented ink layer by rubbing method or transfer printing；
Step 3: lower release layer is covered on the lower surface of coloured adhesion agent layer to get finished product；
Method three (is suitable for embodiment three): it carries out in accordance with the following steps:
Step 1: being coated with colored ink raw material in the lower surface of upper release layer, 50-180 DEG C of curing at low temperatures forms coloured
Ink layer；
Step 2: being coated with auxiliary following layer in colored ink layer surface；
Step 3: coloured adhesion agent layer to be formed in the lower surface of auxiliary following layer by rubbing method or transfer printing；
Step 4: lower release layer is covered on the lower surface of coloured adhesion agent layer to get finished product.
The specific folded structure of coloured adhesion agent layer and pigmented ink layer that table 1 is embodiment A1-A8 is shown and basic performance refers to
Mark, it is as a result as follows.
Table 1:
Table 2 is the pigment addition situation and performance indicator of the embodiment of the present invention B1- embodiment B23 and comparative example, wherein
In each embodiment and comparative example, the thickness of pigmented ink layer is 5 μm, and the thickness of coloured adhesion agent layer is 10 μm.
Table 2:
Note: 1, titanium dioxide is white pigment in table 2.
2, in table 2 black pigment be black iron oxide or black complex, nigrosine, black and anthraquinone it is one of black or
It is several.
3, the test method of volume resistance and sheet resistance is referring to IPC-TM-650 2.5.17.
As seen from Table 2, in the coloured adhesion agent layer of embodiment containing black pigment (embodiment B1 to embodiment B19) or
White pigment (embodiment B20 to embodiment B23), is free of colored pigment in the coloured adhesion agent layer of comparative example, embodiment it is saturating
Luminosity is significantly lower than the light transmittance of comparative example, i.e. the shielding of the cover film containing coloured adhesion agent layer is substantially better than commonly then
The shielding of oxidant layer (without colored pigment) cover film.
As can be seen from Table 1 and Table 2, coloured ultra-thin cover film provided by the invention is by pigmented ink layer and coloured solid
Layer composition can be bonded release layer up and down respectively up and down, have high ionic purity, ultra-thin folded structure thickness, high heat dissipation
Property, high flame retardant, have color ink surface gloss scalability, high shielding, be particularly suitable for using in superfine wire route,
Especially the pigmented ink layer of black can be replaced plus the special shielding that can protect route of application of the coloured following layer of black
For black polyamide thin film at high cost and there are technical problem.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields, similarly
It is included within the scope of the present invention.
Claims (10)
1. a kind of coloured ultra-thin cover film of high shielding, it is characterised in that:
Including pigmented ink layer and coloured adhesion agent layer, the pigmented ink layer is located at the top of the coloured adhesion agent layer, institute
It states pigmented ink layer and is equipped at least one layer；
The sum of thickness of both the pigmented ink layer and the coloured adhesion agent layer is 4-35 μm, wherein the colored ink
Layer with a thickness of 1-10 μm；The coloured adhesion agent layer with a thickness of 3-25 μm；
The light transmittance of the cover film is 0.2-12.3%；
The coloured adhesion agent layer includes pigment and resin material；The pigment accounts for the total solid content of the coloured adhesion agent layer
2-50% (weight percentage), the resin material account for the 40-90% (weight hundred of the total solid content of the coloured adhesion agent layer
Divide content)；
The pigmented ink layer includes pigment and resin material, and the pigment accounts for the 2- of the total solid content of the pigmented ink layer
50% (weight percentage).
2. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the coloured adhesion agent layer is
Refer to Dk value be 2.4-10.0, Df value be 0.002-0.080, water absorption rate between 0.03-3%, line insulation impedance be greater than 108Ω、
Sheet resistance is greater than 1012Ω and volume resistance are greater than 1014The glue-line of Ω ˙ cm.
3. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the pigment includes inorganic face
Material or organic pigment；
Wherein, the inorganic pigment is cadmium red, cadmium lemon yellow, tangerine cadmium yellow, titanium dioxide, carbon black, black iron oxide or black network
Close object；
The organic pigment is nigrosine, black, anthraquinone is black, diphenyl amine yellow uitramarine, phthalocyanine blue or dark green.
4. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the pigmented ink layer also wraps
At least one of inorganic particle, organic powder and tool fire-retardant compound are included, the inorganic particle includes calcium sulfate, titanium dioxide
Silicon, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, aluminium hydroxide, aluminium oxide, talcum powder, aluminium nitride, glass powder, silica flour
At least one of body, diamond dust and clay, the organic powder are polyimides system, and the tool fire-retardant compound includes halogen
At least one of element, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio always contain admittedly for pigmented ink layer
The ratio of the 1-50% (weight percent) of amount, the tool fire-retardant compound of phosphorous system are the 1- of pigmented ink layer total solid content
40% (weight percent).
5. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the coloured adhesion agent layer is also
Including at least one of inorganic particle, organic powder and tool fire-retardant compound, the inorganic particle includes calcium sulfate, dioxy
SiClx, zinc sulphide, zirconium oxide, calcium carbonate, boron nitride, aluminium hydroxide, aluminium oxide, talcum powder, aluminium nitride, glass powder, quartz
At least one of powder, diamond dust and clay, the organic powder are polyimides system, and the tool fire-retardant compound includes containing
At least one of halogen, phosphorus system, nitrogen system and boron system；
And the sum of the silica, talcum powder, calcium carbonate, glass powder and quartzy powder ratio are always solid for coloured adhesion agent layer
The ratio of the 1-50% (weight percent) of content, the tool fire-retardant compound of phosphorous system are coloured adhesion agent layer total solid content
1-50% (weight percent).
6. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the pigmented ink layer is equipped with
Two layers, and respectively the first pigmented ink layer and the second pigmented ink layer, first pigmented ink layer, which is located at described second, to be had
The upper surface of color ink layer, second pigmented ink layer are located at the upper surface of the coloured adhesion agent layer；
The thickness of first pigmented ink layer and second pigmented ink layer is all 2-3 μm.
7. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: it further include auxiliary following layer,
The auxiliary following layer is between the pigmented ink layer and the coloured adhesion agent layer, and the thickness of the auxiliary following layer
It is 3-25 μm.
8. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: the color ink layer and described
The sum of thickness of both coloured adhesion agent layers is down to 4-7 μm.
9. the coloured ultra-thin cover film of high shielding according to claim 1, it is characterised in that: it further include release layer, it is described
Release layer includes upper release layer and lower release layer, and the upper release layer is delustring release film layer, and the delustring release film layer with
The one side of the pigmented ink layer contact is rough surface and Rz value is 0.1-10 μm.
10. a kind of preparation method of the high coloured ultra-thin cover film of shielding according to claim 9, it is characterised in that: press
It is carried out according to following steps:
Step 1: being coated with colored ink raw material in the lower surface of upper release layer, 50-180 DEG C of curing at low temperatures forms colored ink
Layer；
Step 2: coloured adhesion agent layer to be formed in the lower surface of pigmented ink layer by rubbing method or transfer printing；
Step 3: lower release layer is covered on the lower surface of coloured adhesion agent layer to get finished product.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177798.7A CN109825204A (en) | 2017-11-23 | 2017-11-23 | A kind of coloured ultra-thin cover film of high shielding and preparation method |
| TW107127810A TWI671339B (en) | 2017-11-23 | 2018-08-09 | High-shielding colored ultra-thin cover film and the preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177798.7A CN109825204A (en) | 2017-11-23 | 2017-11-23 | A kind of coloured ultra-thin cover film of high shielding and preparation method |
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| CN109825204A true CN109825204A (en) | 2019-05-31 |
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| CN201711177798.7A Pending CN109825204A (en) | 2017-11-23 | 2017-11-23 | A kind of coloured ultra-thin cover film of high shielding and preparation method |
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| CN (1) | CN109825204A (en) |
| TW (1) | TWI671339B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656837A (en) * | 2022-01-07 | 2022-06-24 | 惠州市百时达化工有限公司 | High-covering-capacity high-insulation black ink and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI671339B (en) | 2019-09-11 |
| TW201925287A (en) | 2019-07-01 |
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Application publication date: 20190531 |