CN102079956B - White covering film and manufacturing method thereof - Google Patents
White covering film and manufacturing method thereof Download PDFInfo
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- CN102079956B CN102079956B CN201010594348XA CN201010594348A CN102079956B CN 102079956 B CN102079956 B CN 102079956B CN 201010594348X A CN201010594348X A CN 201010594348XA CN 201010594348 A CN201010594348 A CN 201010594348A CN 102079956 B CN102079956 B CN 102079956B
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- 238000000576 coating method Methods 0.000 claims abstract description 50
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- 229920000728 polyester Polymers 0.000 claims abstract description 30
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- FRQPHGSNRQEKOX-UHFFFAOYSA-N 6h-benzo[c][1,2]benzoxazine Chemical compound C1=CC=C2NOC3=CC=CC=C3C2=C1 FRQPHGSNRQEKOX-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
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- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
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- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229960001866 silicon dioxide Drugs 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 238000004383 yellowing Methods 0.000 abstract description 7
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- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a white covering film and a manufacturing method thereof. The white covering film comprises a release basement membrane, a white coating coated on the release basement membrane and an adhesive layer coated on the white coating. The white coating is a composition using flexible saturated polyester as a matrix and comprises the following components in part by weight: 50 to 70 parts of flexible saturated polyester, 30 to 50 parts of hard saturated polyester, 1 to 20 parts of blocked isocyanate curing agent, 15 to 150 parts of pigment, 15 to 120 parts of inorganic filler, 0.01 to 0.30 parts of fluorescent brightening agent, 0.5 to 2.5 parts of antifoaming agent and a right amount of solvent. The white covering film can be used for a flexible printed circuit and has high yellowing resistance, high covering power, excellent folding resistance and high glossiness. When the white covering film is compressed with a substrate, the excellent adhesion between the white covering film and the substrate is guaranteed.
Description
Technical field
The present invention relates to the flexible printed circuit field, relate in particular to a kind of white mulch film that is used for flexible printed circuit and preparation method thereof.
Background technology
The progress of information, communication industry has driven the high speed development of microelectronics industry, and flexible printed circuit (FPC) arises at the historic moment and obtains fast development, has obtained using widely at numerous areas such as cell phone, notebook computer, liquid crystal display.At present because the LED product has three big characteristics such as energy-saving and environmental protection, life-span length; Its Application Areas constantly enlarges; The kind and the quantity of application product constantly increase; Each side continues to increase the dynamics of investment of LED industry, and particularly China LED industry occurs raising up against the market in financial tsunami at present, has shown powerful vitality.
Flexible printed-circuit board (FPCB) and the maximum difference of rigid printed circuit boards (PCB) are that the former adopts mulch film; The function of mulch film has exceeded the resistance solder paste China ink that PCB uses; It not only plays resistance weldering effect, prevents the copper wire oxidation and make FPC not receive the erosion of dust, moisture, pharmaceutical chemicals, and can reduce stress influence in the BENDING PROCESS, in addition; Along with the development in FPC market, mulch film has been endowed more function.
The traditional technology of LED product is behind the pressing mulch film at present, at its surface applied white ink layer, to improve the contrast gradient of LED product, strengthens it and sets off effect.But operational difficulty such as contraposition has increased operation in the screen printing process, has expended man-hour, and because all performances of folding resistance, anti-deflection and the weathering resistance etc. of printing ink have very big deficiency, to a certain degree limit the expansion of LED product use.
Generally speaking, mulch film consists of support membrane (insulating basement membrane) and adhesive compound.The insulating substrate of flexible printed wiring board be generally polyester (Polyester, PET), gather naphthalene (Polyethylene naphthalene, PEN), polyimide (Polyimide, PI) and other type polymer film.CN200910188903 mentions in coloured PI film both sides and applies white coating and adhesive compound respectively, and to make white mulch film, snappiness is good, opacifying power is high, but because of using the PI film to be insulating basement membrane, cost is higher; CN200910188904 only applies one deck white coating on the dicing film surface, makes white glued membrane, and snappiness is good, and weathering resistance is good, but during the pressing base material, stripping strength is on the low side.
Summary of the invention
The object of the present invention is to provide a kind of white mulch film and preparation method thereof, this white mulch film has excellent yellowing resistance property, high whiteness, outstanding folding resistance and high thermal conductivity, can be used for flexible printed circuit.
For realizing above-mentioned purpose; The present invention provides a kind of white mulch film; Comprise: release basement membrane, be coated on release epilamellar white coating and be coated on the adhesive layer on this white coating; Said white coating is for being the compsn of matrix with flexible saturated polyester, and it comprises that component and weight part thereof are following: flexible saturated polyester 50-70 weight part, hard saturated polyester 30-50 weight part, masked isocyanate solidifying agent 1-20 weight part, pigment 15-150 weight part, mineral filler 15-120 weight part, white dyes 0.01-0.30 weight part, skimmer 0.5-2.5 weight part and solvent are an amount of.
Wherein, the coating thickness of said white coating is 5～35 μ m.
It is polyethylene terephthalate (PET) film or PEN (PEN) film of 12～150 μ m that said release basement membrane adopts thickness, and its single or double scribbles parting agent.
Said parting agent comprises siliceous parting agent and non-silicon parting agent, and the off-type force of parting agent is 0.02～1.0kgf/cm.
Said adhesive layer is epoxy resin or propenoate based composition.
Said solidifying agent is masked isocyanate solidifying agent or opening isocyanate curing agent.
Said masked isocyanate solidifying agent be in aromatic series dead front type polyisocyanate curing agent, the aliphatics dead front type polyisocyanate curing agent one or more.
Said pigment comprises one or more of white titanium pigment, zinc sulphide, lithopone.
Said mineral filler is one or more in mica powder, white lake, silicon-dioxide, Marinco H, silicon powder, the talcum powder.
Said white dyes is one or more in dibenzoxazine type white dyes, the double styrene-biphenyl type optical fluorescence whitening agent.
Said solvent comprises butanone, and toluene and N, one or both in the dinethylformamide.
Simultaneously, the present invention also provides a kind of making method of above-mentioned white mulch film, and it comprises that step is following:
Step 1, release basement membrane is provided, and the compsn of preparation white coating;
Step 2, at release of release basement membrane compsn that applies the above-mentioned white coating that makes, after 180 ℃/1-3min toasts drying, on release basement membrane, form white coating;
During said white mulch film pressing flexible printed-circuit board,, then its release basement membrane is torn off with its adhesive layer contact flexible printed-circuit board pressing.
The invention has the beneficial effects as follows: white mulch film of the present invention; Its white coating is a matrix resin with flexible saturated polyester; Cooperate components such as masked isocyanate solidifying agent, pigment and white dyes; Can obtain high whiteness, excellent anti-yellowing property, high tack, high gloss, weathering resistance is good and resistant to elevated temperatures white coating, prepared white mulch film can be used for flexible printed circuit, has excellent yellowing resistance property, high covering power, outstanding folding resistance and high-luster; During the pressing base material, guaranteed good bonding with base material.And should make simple and fast by the white mulch film.
In order further to understand characteristic of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide reference and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing, describe in detail through specific embodiments of the invention, will make technical scheme of the present invention and other beneficial effects obvious.
In the accompanying drawing,
Fig. 1 is the structural representation of white mulch film of the present invention;
Fig. 2 is the making method schema of white mulch film of the present invention.
Embodiment
White mulch film of the present invention comprises: release basement membrane 10, be coated on the white coating 20 on the release basement membrane 10 and be coated on the adhesive layer 30 on this white coating 20.
Wherein, It is polyethylene terephthalate (PET) film or PEN (PEN) film of 12～150 μ m that release basement membrane 10 adopts thickness; It has colourless, performance such as dimensional stability preferably, and price has great advantage with respect to the PI film, behind the pressing flexible printed-circuit board; Release basement membrane 10 is promptly torn off, thereby guarantees whole excellent heat resistance.And because the effect of release basement membrane 10 has prevented white coating 20 phenomenons such as the moisture absorption, binding dust before production, transportation and pressing are solidified, thereby has had high-luster.The single or double of said release basement membrane 10 scribbles parting agent, and parting agent comprises siliceous parting agent and non-silicon parting agent, and the off-type force of parting agent is 0.02～1.0kgf/cm.Adhesive layer 30 is epoxy resin or propenoate based composition, has higher stripping strength, preferably performance such as snappiness and flame retardant resistance.
The coating thickness of said white coating 20 is 5～35 μ m.White coating 20 is for being the compsn of matrix with flexible saturated polyester, and it comprises that component and weight part thereof are following: flexible saturated polyester 50-70 weight part, hard saturated polyester 30-50 weight part, masked isocyanate solidifying agent 1-20 weight part, pigment 15-150 weight part, mineral filler 15-120 weight part, white dyes 0.01-0.30 weight part, skimmer 0.5-2.5 weight part and solvent are an amount of.
Details are as follows for each component:
(1) saturated polyester
The characteristics of above-mentioned flexible saturated polyester (flexible armorphous saturated polyester) and hard saturated polyester (the armorphous saturated polyester of hard) are that it is thermoplasticity, contains the linear saturated polyester of aromatic nucleus, has better heat-resisting property and anti-yellowing sex change.Polyester such as Vitel 3300B, Vitel2200B, Vitel5833 (Bostik manufactured) with this kind structure.
(2) solidifying agent
Said solidifying agent is masked isocyanate solidifying agent or opening isocyanate curing agent.The masked isocyanate solidifying agent be in aromatic series dead front type polyisocyanate curing agent, the aliphatics dead front type polyisocyanate curing agent one or more, it is controlled that it has good temperature of reaction.This masked isocyanate solidifying agent, but its when being heated to certain temperature just deblocking participate in reaction, promptly with the linear saturated polyester in the oh group reaction, thereby guaranteed in controllability that adds man-hour and good operability.Solidifying agent with this kind structure is like 1530 (Bostik manufactured).
(3) pigment
Said pigment comprises one or more of white titanium pigment, zinc sulphide, lithopone.
(4) mineral filler
Said mineral filler is one or more in mica powder, white lake, silicon-dioxide, Marinco H, silicon powder, the talcum powder.
(5) white dyes
Said white dyes is one or more in dibenzoxazine type white dyes, the double styrene-biphenyl type optical fluorescence whitening agent.This white dyes provides compsn white, and then the white of prepared mulch film is provided.The performance characteristics of white coating is high whiteness and high opacifying power; For realizing these performances; Special white dyes is matched with white titanium pigment, have white dyes such as dibenzoxazine type white dyes, double styrene-biphenyl type optical fluorescence whitening agent, the specifically trade name such as the OB of this structure; KSN, OB-1 etc.
(6) solvent
Said solvent comprises butanone, toluene, N, one or both in the dinethylformamide etc.Solid ingredient is dissolved in the solvent, and the viscosity that can obtain to suit provides good workability, guarantees in coating procedure, not occur visual defects.
In the prescription of white coating according to the invention, except above component, some auxiliary agents can in the scope that does not deviate from the present invention's design, be increased, like flow agent and dispersion agent etc.
As shown in Figure 2, the making method of white mulch film of the present invention, in conjunction with Fig. 1, it comprises that step is following:
Step 1, release basement membrane 10 is provided, and the compsn of preparation white coating.
Step 2, at release of release basement membrane 10 compsn that applies the above-mentioned white coating that makes, after 180 ℃/1-3min baking drying, formation white coating 20 on release basement membrane 10; The thickness of white coating 20 is 5～35 μ m.
Survey performances such as its thermotolerance, weathering resistance, whiteness, flame retardant resistance and opacifying power to the above-mentioned white mulch film of processing, further give to explain in detail and describe like following embodiment.
Now the embodiment of the invention is specified as follows, but the present invention is confined to scope of embodiments.
Embodiment 1:
Flexible linear saturated polyester's (marque Vitel3300B, Bostik manufactured) 68 weight parts; Hard linear saturated polyester (marque Vitel2200B, Bostik manufactured) 32 weight parts; Masked isocyanate solidifying agent (marque 1530, Bayer AG makes) 10 weight parts; Rutile type Titanium Dioxide (marque TRONOX CR828, Australian Ke Meiji Company products) 115 weight parts; White dyes (marque OB-1, U.S. Eastman Company products) 0.08 weight part; Skimmer (marque BYK-57, BYK Company products) 0.4 weight part.The solids content of using butanone solvent to regulate glue is 48%, mixes and processes the white coating compsn.
Said composition is coated on release of the release basement membrane of PET that thickness is 25 μ m through spreadometer, and gluing thickness is 25 μ m, puts in 180 ℃ the baking oven baking again into 2 minutes, on the release basement membrane of PET, makes white coating.Be the epoxyn compsn of 25 μ m then at white coating surface-coated thickness,, make white mulch film through 160 ℃/2min baking processing.
Comparative example 1:
Flexible linear saturated polyester's (marque Vitel3300B, Bostik manufactured) 68 weight parts; Hard linear saturated polyester (marque Vitel2200B, Bostik manufactured) 32 weight parts; Masked isocyanate solidifying agent (marque 1530, Bayer AG makes) 10 weight parts; Rutile type Titanium Dioxide (marque TRONOX CR828, Australian Ke Meiji Company products), 80 weight parts; White dyes (marque OB-1, U.S. Eastman Company products) 0.07 weight part; Skimmer (marque BYK-57, BYK Company products) 0.4 weight part.The solids content of using butanone solvent to regulate glue is 48%, mixes and processes the white coating compsn.
Said composition is coated on release of the release basement membrane of PET that thickness is 25 μ m through spreadometer, and gluing thickness is 25 μ m, puts in 180 ℃ the baking oven baking again into 2 minutes, on the release basement membrane of PET, makes white coating.Be the epoxy resin glue water composition of 25 μ m then at white coating surface-coated thickness,, make white mulch film through 160 ℃/2min baking processing.
Comparative example 2:
Flexible linear saturated polyester's (marque Vitel3300B, Bostik manufactured) 68 weight parts; Hard linear saturated polyester (marque Vitel2200B, Bostik manufactured) 32 weight parts; Masked isocyanate solidifying agent (marque 1530, Bayer AG makes) 5 weight parts; Rutile type Titanium Dioxide (marque TRONOX CR828, Australian Ke Meiji Company products) 110 weight parts; Skimmer (marque BYK-57, BYK Company products) 0.4 weight part.The solids content of using butanone solvent to regulate glue is 48%, mixes and processes the white coating compsn.
Said composition is coated on release of the release basement membrane of PET that thickness is 25 μ m through spreadometer, and gluing thickness is 25 μ m, puts in 180 ℃ the baking oven baking again into 2 minutes, on the release basement membrane of PET, makes white coating.Be the epoxyn compsn of 25 μ m then at white coating surface-coated thickness,, make white mulch film through 160 ℃/2min baking processing.
With the white mulch film that embodiment 1, comparative example 1, comparative example 2 make, (180 ℃/70s) on flexible printed-circuit board, tear the release basement membrane of PET then off, test performance of pressings.Concrete performance data is seen table 1.
Table 1. performance test table look-up
The testing method of above characteristic is following:
(1), anti-immersed solder property: test according to IPC-TM-650 2.4.13.
(2), colourity test: adopt Tristimulus Colorimeter WSD-III, Beijing health Optical Co., Ltd.
(3), folding resistance test: test condition is R=0.38mm, Load=500g.
In sum; White mulch film of the present invention; Its white coating is a matrix resin with flexible saturated polyester, cooperates components such as masked isocyanate solidifying agent, pigment and white dyes, can obtain high whiteness, excellent anti-yellowing property, high tack, high gloss, weathering resistance is good and resistant to elevated temperatures white coating; Prepared white mulch film can be used for flexible printed circuit; Have excellent yellowing resistance property, high covering power, outstanding folding resistance and high-luster, during the pressing base material, guaranteed good bonding with base material.And should make simple and fast by the white mulch film.
The above; For the person of ordinary skill of the art; Can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (7)
1. white mulch film; It is characterized in that; Comprise: release basement membrane, be coated on release epilamellar white coating and be coated on the adhesive layer on this white coating; Said white coating is for being the compsn of matrix with flexible saturated polyester, and it comprises that component and weight part thereof are following: flexible saturated polyester 50-70 weight part, hard saturated polyester 30-50 weight part, masked isocyanate solidifying agent 1-20 weight part, pigment 15-150 weight part, mineral filler 15-120 weight part, white dyes 0.01-0.30 weight part, skimmer 0.5-2.5 weight part and solvent are an amount of; It is pet film or the PEN film of 12～150 μ m that said release basement membrane adopts thickness, and its single or double scribbles parting agent; Said adhesive layer is epoxy resin or propenoate based composition.
2. white mulch film as claimed in claim 1 is characterized in that, the coating thickness of said white coating is 5～35 μ m.
3. white mulch film as claimed in claim 1 is characterized in that, said parting agent comprises siliceous parting agent and non-silicon parting agent, and the off-type force of parting agent is 0.02～1.0kgf/cm.
4. white mulch film as claimed in claim 1 is characterized in that, said masked isocyanate solidifying agent be in aromatic series dead front type polyisocyanate curing agent, the aliphatics dead front type polyisocyanate curing agent one or more.
5. white mulch film as claimed in claim 1; It is characterized in that; Said pigment comprises one or more of white titanium pigment, zinc sulphide, lithopone; Said mineral filler is one or more in mica powder, white lake, silicon-dioxide, Marinco H, silicon powder, the talcum powder, and said white dyes is one or more in dibenzoxazine type white dyes, the double styrene-biphenyl type optical fluorescence whitening agent, and said solvent comprises butanone; And toluene and N, one or both in the dinethylformamide.
6. the making method of a white mulch film as claimed in claim 1 is characterized in that, it comprises that step is following:
Step 1, release basement membrane is provided, and the compsn of preparation white coating;
Step 2, at release of release basement membrane compsn that applies the above-mentioned white coating that makes, after 180 ℃/1-3min toasts drying, on release basement membrane, form white coating;
Step 3, on white coating the adhesive coating layer, after 160 ℃/1-5min baking drying, promptly make white mulch film.
7. the making method of white mulch film as claimed in claim 6 is characterized in that, during this white mulch film pressing flexible printed-circuit board, with its adhesive layer contact flexible printed-circuit board pressing, then its release basement membrane is torn off.
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| CN201010594348XA CN102079956B (en) | 2010-12-18 | 2010-12-18 | White covering film and manufacturing method thereof |
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| CN201010594348XA CN102079956B (en) | 2010-12-18 | 2010-12-18 | White covering film and manufacturing method thereof |
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| CN102079956B true CN102079956B (en) | 2012-06-27 |
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| CN102582187B (en) * | 2012-02-08 | 2014-07-23 | 宁波长阳科技有限公司 | Polyester film for heddles and preparation method of polyester film |
| CN102731743B (en) * | 2012-06-26 | 2014-05-07 | 华烁科技股份有限公司 | Preparation of white thermosetting resin used for LED light having encapsulating film |
| CN102970820B (en) * | 2012-11-24 | 2015-06-24 | 中山市东溢新材料有限公司 | Covering film for flexible printed circuit board and manufacturing process thereof |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735755A (en) * | 2009-12-11 | 2010-06-16 | 广东生益科技股份有限公司 | Adhesive composition and method for manufacturing flexible printed-circuit board by using same |
| CN101735575A (en) * | 2009-12-11 | 2010-06-16 | 广东生益科技股份有限公司 | Resin composition and method for preparing FPC coverlay by using same |
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2010
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