CN103834320A - Re-peel-off type special double-faced adhesive sheet for fixing flexible printed circuit board - Google Patents
Re-peel-off type special double-faced adhesive sheet for fixing flexible printed circuit board Download PDFInfo
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- CN103834320A CN103834320A CN201410066143.2A CN201410066143A CN103834320A CN 103834320 A CN103834320 A CN 103834320A CN 201410066143 A CN201410066143 A CN 201410066143A CN 103834320 A CN103834320 A CN 103834320A
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Abstract
The invention provides a re-peel-off type special double-faced adhesive sheet for fixing flexible printed circuit board. The double-faced adhesive sheet for fixing a flexible printed circuit board comprises a first core material layer, a first adhesive layer and a second adhesive layer, wherein the core material layer is arranged between the inner side of the first adhesive layer and the inner side of the second adhesive layer, the core material of the core material layer is a polyester film with thickness not more than 12 microns, the first adhesive layer is a re-peel-off layer, the second adhesive layer is a permanent fixing layer, the initial adhesive force of the first adhesive layer is not more than 700g/20mm, and the adhesive force after being fixed is not less than 900g/20mm, and the adhesive force of the second adhesive layer is not less than 900g/20mm. The double-faced adhesive sheet is prepared by adopting special acrylic acid adhesive and can be re-peeled off within short time, and the re-work performance is good, the permanent adhesion and fixation after re-working and fixing can be satisfied, and the adhesive sheet cannot warp and deform after aging within a certain environment.
Description
technical field
The present invention relates to a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, belong to electrical fittings technical field.
background technology
At present, in electron trade, the application of flexible printed circuit board (claiming again FPC) is more and more extensive, FPC has that reliability is high, space hold rate is low, the advantage of flexible structure, therefore the FPC the most common mode that to be also the LED such as mobile phone, LCD TV, computer, PDA link with main power circuit, and the usage quantity of following FPC can grow with each passing day surely.Along with FPC constantly pursues circuit densification and light, thin, short, little trend development, need FPC to walk technically accurate route, the auxiliary facility such as people, thing is also had higher requirement, simultaneously also diversified and harsh all the more for the performance requriements of the double-sided adhesive sheet to the fixing use of FPC.
As everyone knows, in the application process of fixing FPC, the both-sided adhesive flake products adopting is mainly that employing two sides is all that the adhesive product that is permanently fixed type is made, and its structure is all the coated on both sides tackiness agent at core, and the both sides of tackiness agent isolate with release liner respectively.So mainly there is following problem when with the fixing FPC of double-sided adhesive sheet:
The double-sided adhesive sheet that adopts high adhesion fixed tackiness agent to make, this adhesive sheet can meet the characteristic that permanent bond is permanently fixed, but the initial stage is while fixedly occurring departing from, fit again after cannot the peeling off operation of (work of weighing again), easily produce pollution, cull, peel off the problems such as wrinkling, double-sided adhesive sheet cannot be reused, can only scrap processing, this has not only reduced the yield rate of product, cause unnecessary waste, more increase the difficulty of operation, virtually improved the cost of product;
The double-sided adhesive sheet that the fixed tackiness agent of adhering in employing is made, utilizes reduction initial stage laminate pressure when fixing FPC, carry out the problem of improvement initial stage laminating heavy industry difficulty, but the risk of the FPC reflex action in the later stage simultaneously also having increased;
The double-sided adhesive sheet that adopts low adhesion tackiness agent to make, can guarantee heavy industry, but the probability that the later stage warps through high temperature gummed tape adhesive sheet is higher, greatly reduces yield rate.
In view of some problems that above-mentioned FPC double-coated pressure sensitive adhesive sheet for fixing exists, prior art is also studied improvement to double-sided adhesive sheet.A kind of good double-coated pressure sensitive adhesive sheet for fixing flexible printed circuit board is disclosed in patent 201010004699.0 " double-coated pressure sensitive adhesive sheet for fixing flexible printed circuit board ", its processibility, venting inhibition and discrepancy in elevation tracing ability are good, and adding after stickup has the characteristic not producing from adherend perk man-hour.In this patent, the defect of double-sided adhesive sheet is the laminating initial stage at product, occurs the bad and problem that is not easy to peel off of doing over again of laminating.In patent 201110272505.X " flexible printed circuit board is fixing with double-faced adhesive tape and with the flexible printed circuit board of double-faced adhesive tape ", the fixing use of a kind of flexible printed circuit board double-faced adhesive tape is disclosed, excellent in adhesiveness when light crimping and the resistance to rebound resilience after high-temperature process are also good, the perk distance L EssT.LTssT.LT 2.5mm after backflow.Though this method can meet the bad problem of initial stage heavy industry performance, have the excessive risk of perk distance after different environment and operation, and operability is had relatively high expectations.Patent 201110201246.1 " double-coated pressure sensitive adhesive sheet for fixing flexible printed circuit board and manufacture method thereof " discloses a kind of double-sided adhesive sheet with polysiloxane-based release liner, the thickness of described adherend is below 60 μ m, and at 70 ℃, heats after 2 hours from the height < 1.5mm of the test film end of adherend surface perk.The defect of this product is the laminating initial stage at product, occurs that laminating is bad and is not easy to peel off while doing over again problem.
summary of the invention
In view of the defect of above-mentioned prior art existence, the object of the invention is to propose a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, can be easy to peel off again in short-term, can meet repeatedly heavy industry, peel off rear without cull, pollution-free, not warpage, not deformation, can meet after fixing and be permanently fixed, make can not produce and throw off and warpage between FPC and clung body.
Object of the present invention is achieved by the following technical programs:
A kind of flexible printed circuit board is fixing with the extraordinary double-sided adhesive sheet of removable type, comprise a core layer, the first binder layer and the second binder layer, described core layer is arranged between described the first binder layer inner side and the second binder layer inner side, it is characterized in that: the core of described core layer is the mylar that thickness is no more than 12 μ m, described the first binder layer is peel ply again, described the second binder layer is for being permanently fixed layer, initial stage bounding force≤the 700g/20mm of described the first binder layer, bounding force >=900g/20mm after fixing, bounding force >=the 900g/20mm of described the second binder layer.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, described the first binder layer be used for boning clung body of stainless steel (SUS) material, described the second binder layer is for the basement membrane of polyimide film (PI) material of the FPC that bonds.
Above-mentioned flexible printed circuit board is fixing, and with in the extraordinary double-sided adhesive sheet of removable type, preferred, the core of described core layer is polyethylene terephthalate, and thickness is 1-12 μ m; The core of described core layer is polyethylene terephthalate, and thickness is 1-12 μ m; The thickness of described the first binder layer is 5-20 μ m, and the thickness of described the second binder layer is 5-20 μ m.
The core of above-mentioned core layer is the fid of double-sided adhesive sheet, and effect is the operability that improves double-sided adhesive sheet, and the thickness of core is selected according to the concrete thickness of double-sided adhesive sheet.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, bridging agent, the organic solvent of tackiness agent, isocyanates and/or epoxies that described the first binder layer is formed by acrylic polymers form, wherein, the consumption of tackiness agent: consumption=100 weight part of bridging agent: (0.5-2) weight part.
The consumption of above-mentioned organic solvent is appropriate, and preferably consumption is take the solid content 30% of polymkeric substance as degree.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferred, and described tackiness agent is that a kind of monomer in the straight or branched acrylic ester monomer of 1-14 or several monomer polymerization form by carbonatoms.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, described tackiness agent is by comprising that one or more polymerizations in butyl acrylate (BA), vinylformic acid (AA), ethyl acrylate (2-EHA), 2-Hydroxy ethyl acrylate (HEA), methyl acrylate (MA), methyl methacrylate (MMA), vinyl-acetic ester (VAC), n-BMA (n-BMA), methacrylic acid-2-ethylhexyl (2-EHMA) form.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, and preferred, described tackiness agent is formed by the butyl acrylate of 92-98 weight part, the vinylformic acid of 2-8 weight part, the 2-Hydroxy ethyl acrylate polymerization of 0.05-0.3 weight part.
The monomer of above-mentioned formation tackiness agent in use performance difference is separately larger, therefore need be used in conjunction with.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, described bridging agent is isocyanates and/or epoxies bridging agent, described isocyanates bridging agent comprises new one or more combination of combining in the L-type bridging agent produced, D-100K type bridging agent that DIC produces, L-55E bridging agent that synthetic chemistry is produced, and described epoxies bridging agent comprises that EX-50 type bridging agent and/or Japan that DIC produces combines the E-AX type bridging agent that grinds production.
The feature of above-mentioned bridging agent is mainly manifested in: adherence and the temperature tolerance of isocyanates bridging agent to base material is better, and performance easily averages out, and epoxy resin bridging agent thermotolerance is better, and working life is longer, be not subject to impact and the flavescence of humidity, preferred isocyanate class bridging agent.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferred, and described organic solvent includes one or more the combination in toluene (TO), ethyl acetate (ETAC), Virahol (IPA) and butanone (MEK).
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, and preferred, described organic solvent comprises toluene and/or ethyl acetate.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, described the second binder layer is that highly tacky adhesive or described the second binder layer are to add tackifying resin on the component basis of the first binder layer, and described tackifying resin comprises one or more the combination in Gum Rosin, terpine resin, petroleum resin.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, and preferred, described tackifying resin comprises Gum Rosin and/or terpine resin, preferably Gum Rosin.
Above-mentioned tackifying resin can increase the viscosity of the second bonding coat, make the initial stage just reach bounding force >=900g/20mm, and the first bonding coat does not add because needs guarantee releasable (heavy industry).
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, described highly tacky adhesive is U.S. 3M, Japan rattan storehouse chemical industry, Japan combines and grinds chemistry, Changxing, Taiwan chemical industry, the high-adhesive adhesive product of Taiwan Xin Zongdeng producer, as long as control its initial stage bounding force >=900g/20mm.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, this double-sided adhesive sheet also comprises the first release liner and the second release liner, described the first release liner and the second release liner are separately positioned on the outside of described the first binder layer and the outside of the second binder layer, and the peeling force of the first release liner is at least 2 times of peeling force of the second release liner.
The design of the peeling force of above-mentioned release liner is the phenomenon that there will not be wrinkling anti-stripping for double-sided adhesive sheet in the process using; Preferably, the peeling force of the first release liner is 10-90g/50mm, and the peeling force of the second release liner is 5-30g/50mm.Described peeling force refers to measure the peeling force of release liner to adherend according to JIS Z 0237 (2000) by 90 ° of ∠, the stripping test of 1000mm speed.
Described the first release liner and the second release liner are as the sealing coat of binder layer, and protection the first binder layer and the second binder layer, in use need to peel off.
The peel ply of above-mentioned the first release liner and the second release liner is the surface of fitting with binder layer, can have the coating (for example, antistatic coating) of other performances on the basis that does not affect performance.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, preferably, described the first release liner and the second release liner are the liner that at least one surface has polysiloxane-based peel ply, the base material of described the first release liner and the second release liner comprises polypropylene (PP), polyethylene (PE), PEN (PEN), polyethylene terephthalate (PET), polyimide (PI), leaching membrane paper or Ge Laxin paper, preferably polyethylene terephthalate (PET) film.
The thickness of above-mentioned base material is not particularly limited, and preferably 25～125 μ m can improve cross cutting and the processing characteristics of product.
The color of above-mentioned base material is not particularly limited, preferably blue, green, can improve the resolution of product.
The first above-mentioned release liner and the second release liner also can directly be selected Japanese NIPPA, Mitsubishi chemistry, the Japan Supreme Being people of Du Pont, Taiwan six directions chemical industry, Shanghai Tian Yuan, Wuxi culminant star, Yangzhou Wan Run, Japan large clear and, the Nai Heng world, upper Hypon swallow, the exfoliated product of Kunshan Fu Taideng producer, the peeling force that only needs to control the first release liner is at least 2 times of peeling force of the second release liner.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, and preferred, the thickness of this double-sided adhesive sheet is below 50 μ m, preferably 10～50 μ m, more preferably 30-50 μ m, after this double-sided adhesive sheet is permanently fixed, through environmental aging after 240 hours, perk amount≤1.5mm;
Described perk amount refers to: the second bonding coat paste List of the double-sided adhesive sheet test film of long 35mm, wide 15mm is on the PI base film surface of the FPC of thick 100 μ m, long 35mm, wide 25mm, laminating by it with roll-type laminating platform; Double-sided adhesive sheet test film is aimed to the edge of the stainless steel plate of thick 2mm, long 150mm, wide 70mm, residual F PC is all bent to the back side of stainless steel plate and fixes, and by the first bonding coat paste List to stainless steel plate front, the end face height between end and the clung body stainless steel plate of the double-sided adhesive sheet test film perk after environmental aging is perk amount.
Above-mentioned flexible printed circuit board is fixing with in the extraordinary double-sided adhesive sheet of removable type, if the thickness of this double-sided adhesive sheet exceedes 50 μ m and is unfavorable for that FPC is in short-and-medium, little, light, the thin development trend in electronic product field, thickness < 10 μ m can cause operability and the bonding stability decreases of product.
Flexible printed circuit board of the present invention is fixing to be prepared by following method with removable type special type double-sided adhesive sheet:
Method 1: adopt the first binder layer is coated to the first release liner, fit (claiming to turn again painting) with core after dried/cured, be coated with the second binder layer on the second release liner, and fit and batch with the above-mentioned core back side (glue-free face).
Method 2: can adopt tackiness agent is directly coated on core, fit (claiming again straight painting) after dried/cured with release liner, then carry out the coating of tackiness agent at the another side of core, release liner is fitted and batched.
In order to improve the adhesion property of tackiness agent and core, can carry out high-voltage electric shock processing (physical method) to above-mentioned core, and apply the treatment processs such as primary coat liquid (chemical process).Preferably physical method, it can carry out online treatment, and cost is low, it is little to pollute.
The fixing preparation method with the extraordinary double-sided adhesive sheet of removable type of flexible printed circuit board of the present invention also can adopt above-mentioned straight painting and turn two kinds of coating methods mixing of painting and carry out.Preferably, first turn the coating method of painting, more preferably two sides all turns the coating method of painting, and this method is conducive to the preparation of the double-sided adhesive sheet of slim core material structure.The breakage problem that this method also can avoid film to cause because tensile stress is excessive, thus yield rate and the production efficiency of product improved.
Coating apparatus can adopt the coating machine of known technology, comprises intaglio plate roll coater, scraper type coating machine, jet printing type coating machine, reticulate pattern wound rod coating machine etc., preferably scraper type coating machine and jet printing type coating machine, more preferably jet printing type coating machine.
Outstanding effect of the present invention is:
Adopt special acryloid cement to make double-sided adhesive sheet, can there is the problems such as laminating is bad and need to do over again in the process of equipment or the fixing FPC of workman time, be easy to peel off again in short-term, and repeatedly heavy industry, peel off rear without cull, pollution-free, not warpage, not deformation, heavy industry excellent property; Can meet permanent bond and fixing after heavy industry and after fixing, and still not warpage, not deformation after certain environment is aging; Improve FPC yield rate, saved resource, reduced unnecessary waste.The making processes of product of the present invention is simple simultaneously, easy handling, and the impact that changed by external environment is less, and stable performance, low cost of manufacture.
accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 double-sided adhesive sheet,
Fig. 2 is the use schematic diagram of double-sided adhesive sheet in the time of fixing flexible printed circuit board (PCB),
Fig. 3 is the partial enlarged drawing of Fig. 2.
Description of reference numerals: 1 double-sided adhesive sheet with release liner, 21 second release liners, 22 first release liners, the double-sided adhesive sheet under 3 use states, 31 second binder layers, 32 cores, 33 first binder layers, 4 stainless steel plates, 5 FPC, 51 PI basis film layers, 52 copper foil layers, 53 PI basis film layers.
Embodiment
Below just accompanying drawing in conjunction with the embodiments, by specific embodiment, the present invention will be described, so that technical solution of the present invention is easier to understand, grasp, but the present invention is not limited thereto.Experimental technique described in following embodiment, if no special instructions, is ordinary method; Described reagent and material, if no special instructions, all can obtain from commercial channels.
In embodiment, the first release liner and the second release liner are L138A, the H975A that is selected from South Asia, Taiwan, the Japan Supreme Being people's of Du Pont #24, #70, Wuxi culminant star 1000E, Yangzhou Wan Run PETR-25LA, the POLY SLIK series of the Nai Heng world, the 80g lattice Racine separate-type paper that Kunshan is happy safe, Deng the exfoliated product of producer, the peeling force that only needs to control the first release liner is at least 2 times of peeling force of the second release liner.The second binder layer tackiness agent used is highly tacky adhesive, be selected from new comprehensive HT-6502D, DIC 5020, Changxing 77037 etc.
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 0.5 weight part.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 92 weight parts, vinylformic acid 8 weight parts, 2-Hydroxy ethyl acrylate 0.05 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 0.5 weight part (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
Embodiment 2
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 1.2 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 92 weight parts, vinylformic acid 8 weight parts, 2-Hydroxy ethyl acrylate 0.05 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 1.2 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 2.0 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 92 weight parts, vinylformic acid 8 weight parts, 2-Hydroxy ethyl acrylate 0.05 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 2.0 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 0.8 weight part.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 98 weight parts, vinylformic acid 2 weight parts, 2-Hydroxy ethyl acrylate 0.2 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 0.8 weight part (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 1.5 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 98 weight parts, vinylformic acid 2 weight parts, 2-Hydroxy ethyl acrylate 0.2 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 1.5 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
Embodiment 6
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 0.5 weight part.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 98 weight parts, vinylformic acid 2 weight parts, 2-Hydroxy ethyl acrylate 0.2 weight part, Diisopropyl azodicarboxylate 0.2 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 0.5 weight part (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 13 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 13 μ m.
Embodiment 7
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 1.5 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 98 weight parts, vinylformic acid 2 weight parts, 2-Hydroxy ethyl acrylate 0.2 weight part, Diisopropyl azodicarboxylate 0.2 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 1.5 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 13 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 13 μ m.
Embodiment 8
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 0.5 weight part.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 96 weight parts, vinylformic acid 4 weight parts, 2-Hydroxy ethyl acrylate 0.1 weight part, Diisopropyl azodicarboxylate 0.1 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 0.5 weight part (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 13 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 13 μ m.
Embodiment 9
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 1.2 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 96 weight parts, vinylformic acid 4 weight parts, 2-Hydroxy ethyl acrylate 0.1 weight part, Diisopropyl azodicarboxylate 0.1 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 1.2 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 13 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 13 μ m.
Embodiment 10
The present embodiment provides a kind of flexible printed circuit board fixing with the extraordinary double-sided adhesive sheet of removable type, as shown in Figure 1, the double-sided adhesive sheet of the present embodiment is the double-sided adhesive sheet 1 with release liner, comprise core layer 32, the first binder layer 33 and the second binder layer 31, described core layer 32 is arranged between described the first binder layer 33 inner sides and the second binder layer 31 inner sides, also comprise the first release liner 22 and the second release liner 21, described the first release liner 22 and the second release liner 21 are separately positioned on the outside of described the first binder layer 33 and the outside of the second binder layer 31.
The core of above-mentioned core layer is PET film, and the first above-mentioned binder layer comprises following component: in weight fraction, and acrylic polymers 100 weight parts, isocyanates bridging agent 2.0 weight parts.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 96 weight parts, vinylformic acid 4 weight parts, 2-Hydroxy ethyl acrylate 0.1 weight part, Diisopropyl azodicarboxylate 0.1 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Get acrylic polymers 100 weight parts obtained above, coordinate isocyanates bridging agent (the solid component concentration 50% weight part) solution of 2.0 weight parts (solids component conversion), be mixed to get binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 13 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 13 μ m.
Comparative example 1
This comparative example provides a kind of double-sided adhesive sheet, and its structure is with embodiment 1-10, and its first binder layer comprises following component: in weight fraction, acrylic polymers 100 weight parts, do not add isocyanates bridging agent.
Above-mentioned acrylic polymers, in weight fraction, is made up of following raw material:
Butyl acrylate 92 weight parts, vinylformic acid 8 weight parts, 2-Hydroxy ethyl acrylate 0.05 weight part, Diisopropyl azodicarboxylate 0.05 weight part, toluene are solvent (amount take the solid content 30% of polymkeric substance for spending).
The first above-mentioned binder layer is arriving of preparing by the following method:
Butyl acrylate, vinylformic acid and 2-Hydroxy ethyl acrylate take toluene as solvent, carry out polymerization take Diisopropyl azodicarboxylate as initiator by ordinary method, are obtained to relative molecular weight and are the solution (solid component concentration: 30% weight part) of 400,000 acrylic polymers;
Getting acrylic polymers obtained above is binder solution;
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 80 ℃ and be dried, be 90 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 30 μ m: the second binder layer 31 thickness are 10 μ m, core PET thin film layer 32 thickness are 4.5 μ m, and the first binder layer 33 thickness are 16 μ m.
Comparative example 2
This comparative example provides a kind of double-sided adhesive sheet, and its structure is with embodiment 1-10, and its first binder layer comprises following component: in weight fraction, and silica type polymkeric substance 100 weight parts, polydimethylsiloxane 1 weight part, Pt catalyzer 1 weight part.
The first above-mentioned binder layer is arriving of preparing by the following method:
By mixed type organosilicon rubber 100 weight parts, polydimethylsiloxane 1 weight part, carries out polymerization with Pt catalyzer 1 weight part by ordinary method, the solution (solid component concentration: 55% weight part) of the silica type polymkeric substance obtaining.
The double-sided adhesive sheet of the present embodiment is preparation like this:
The second binder layer 31 is uniformly coated on the second release liner 21, send into temperature and be in the baking oven of 130 ℃ and be dried, be 120 seconds time of drying, dry after and the first surface of PET film core 32 pressure be under 20Kg condition, carry out laminating, rolling, obtains the first engineering product.
The first binder layer 33 is uniformly coated on the first release liner 22, send into temperature and be in the baking oven of 130 ℃ and be dried, be 120 seconds time of drying, after dry with the second surface of the PET film core 32 of above-mentioned the first engineering product pressure be under 20Kg condition, carry out laminating, rolling, obtains the second engineering product.
By the second above-mentioned engineering product maturation 3 days under 40 ℃ of conditions, obtain FPC fixing with, total thickness be the double-sided adhesive sheet of 50 μ m: the second binder layer 31 thickness are 19 μ m, core PET thin film layer 32 thickness are 12 μ m, and the first binder layer 33 thickness are 19 μ m.
Double-sided adhesive sheet to comparative example 1,2 and embodiment 1-10 is evaluated, as shown in Figures 2 and 3, by double-sided adhesive sheet fixing flexible circuit card FPC5, FPC5 has the PI basis film layer 51,53 of copper foil layer 52 and both sides laminating, glass removes the second release liner 21 and the first release liner 22, by the second binder layer 31 paste Lists of double-sided adhesive sheet the PI base film surface of FPC on 53, with roll-type laminating platform, it is laminating; Double-sided adhesive sheet is aimed to the edge of stainless steel plate 4, residual F PC5 is all bent to the back side of stainless steel plate 4 fixing, and by the first binder layer 33 paste Lists to stainless steel plate 4 fronts, carry out every test:
1. peel off again and 1. shell face bounding force: be that the first binder layer 33 is pasted on stainless steel plate and peeled off after 20min, survey its peeling force;
2. be permanently fixed face bounding force: be that the second binder layer 31 is pasted on 25 μ mPI films and peeled off after 20min, survey its peeling force;
3. peel off heavy industry: be the base film surface 53(PI material that the second binder layer 31 is pasted to clung body FPC5), the first binder layer 33 is pasted on clung body (stainless steel plate).To carry out in the 24h≤heavy industry of 5 times of stainless steel plate (SUS plate) face, the surface appearance of observing SUS plate;
4. perk amount: the end face height after the condition of 70 ℃ of * 4h between test film and clung body SUS plate.
Result is as shown in table 1 below, in table, 1. acrylic polymers refers to the acrylic polymers that embodiment 1-3 and comparative example 1 component proportion used obtain, in table, 2. acrylic polymers refers to the acrylic polymers that embodiment 4,5 component proportions used obtain, in table, 3. acrylic polymers refers to the acrylic polymers that embodiment 6,7 component proportions used obtain, in table, 4. acrylic polymers refers to the acrylic polymers that embodiment 8-10 component proportion used obtains, and in table, 5. silica type polymkeric substance refers to the silica type polymkeric substance that comparative example 2 component proportion used obtains.
Adopt special acryloid cement to make double-sided adhesive sheet by table 1 is visible, can there is the problems such as laminating is bad and need to do over again in the process of equipment or the fixing FPC of workman time, be easy to peel off again in short-term, and repeatedly heavy industry, peel off rear without cull, pollution-free, not warpage, not deformation, heavy industry excellent property; Can meet permanent bond and fixing after heavy industry and after fixing, and still not warpage, not deformation after certain environment is aging; Improve FPC yield rate, saved resource, reduced unnecessary waste.The making processes of product of the present invention is simple simultaneously, easy handling, and the impact that changed by external environment is less, and stable performance, low cost of manufacture.
The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming, within all dropping on protection scope of the present invention.
Claims (14)
1. a flexible printed circuit board is fixing with the extraordinary double-sided adhesive sheet of removable type, comprise a core layer, the first binder layer and the second binder layer, described core layer is arranged between described the first binder layer inner side and the second binder layer inner side, it is characterized in that: the core of described core layer is the mylar that thickness is no more than 12 μ m, described the first binder layer is peel ply again, described the second binder layer is for being permanently fixed layer, initial stage bounding force≤the 700g/20mm of described the first binder layer, bounding force >=900g/20mm after fixing, bounding force >=the 900g/20mm of described the second binder layer.
2. flexible printed circuit board according to claim 1 is fixing is characterized in that: the core of described core layer is polyethylene terephthalate with the extraordinary double-sided adhesive sheet of removable type, and thickness is 1-12 μ m; The thickness of described the first binder layer is 5-20 μ m, and the thickness of described the second binder layer is 5-20 μ m.
3. flexible printed circuit board according to claim 1 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: bridging agent, the organic solvent of tackiness agent, isocyanates and/or epoxies that described the first binder layer is formed by acrylic polymers form, wherein, the consumption of tackiness agent: consumption=100 weight part of bridging agent: (0.5-2) weight part.
4. flexible printed circuit board according to claim 3 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described tackiness agent is that a kind of monomer in the straight or branched acrylic ester monomer of 1-14 or several monomer polymerization form by carbonatoms.
5. flexible printed circuit board according to claim 4 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described tackiness agent is by comprising that one or more polymerizations in butyl acrylate, vinylformic acid, ethyl acrylate, 2-Hydroxy ethyl acrylate, methyl acrylate, methyl methacrylate, vinyl-acetic ester, n-BMA and methacrylic acid-2-ethylhexyl form.
6. flexible printed circuit board according to claim 5 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described tackiness agent is formed by the butyl acrylate of 92-98 weight part, the vinylformic acid of 2-8 weight part, the 2-Hydroxy ethyl acrylate polymerization of 0.05-0.3 weight part.
7. flexible printed circuit board according to claim 3 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described bridging agent is isocyanates and/or epoxies bridging agent, described isocyanates bridging agent comprises new one or more combination of combining in the L-type bridging agent produced, D-100K type bridging agent that DIC produces, L-55E bridging agent that synthetic chemistry is produced, and described epoxies bridging agent comprises that EX-50 type bridging agent and/or Japan that DIC produces combines the E-AX type bridging agent that grinds production.
8. flexible printed circuit board according to claim 3 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described organic solvent includes one or more the combination in toluene, ethyl acetate, Virahol, butanone.
9. flexible printed circuit board according to claim 8 is fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described organic solvent comprises toluene and/or ethyl acetate.
10. fixing with the extraordinary double-sided adhesive sheet of removable type according to the flexible printed circuit board described in claim 1-9 any one, it is characterized in that: described the second binder layer is that highly tacky adhesive or described the second binder layer are to add tackifying resin on the component basis of the first binder layer, described tackifying resin comprises one or more the combination in Gum Rosin, terpine resin, petroleum resin.
11. flexible printed circuit boards according to claim 10 are fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described tackifying resin comprises Gum Rosin and/or terpine resin, preferably Gum Rosin.
12. is fixing with the extraordinary double-sided adhesive sheet of removable type according to the flexible printed circuit board described in claim 1-11 any one, it is characterized in that: this double-sided adhesive sheet also comprises the first release liner and the second release liner, described the first release liner and the second release liner are separately positioned on the outside of described the first binder layer and the outside of the second binder layer, and the peeling force of the first release liner is at least 2 times of peeling force of the second release liner.
13. flexible printed circuit boards according to claim 12 are fixing with the extraordinary double-sided adhesive sheet of removable type, it is characterized in that: described the first release liner and the second release liner are the liner that at least one surface has polysiloxane-based peel ply, the base material of described the first release liner and the second release liner comprises polypropylene, polyethylene, PEN, polyethylene terephthalate, polyimide, leaching membrane paper or Ge Laxin paper, preferably polyethylene terephthalate.
14. is fixing with the extraordinary double-sided adhesive sheet of removable type according to the flexible printed circuit board described in claim 1 or 12, it is characterized in that: the thickness of this double-sided adhesive sheet is below 50 μ m, preferably 30-50 μ m, after this double-sided adhesive sheet is permanently fixed, through environmental aging after 240 hours, perk amount≤1.5mm;
Described perk amount refers to: the second bonding coat paste List of the double-sided adhesive sheet test film of long 35mm, wide 15mm is on the PI base film surface of the FPC of thick 100 μ m, long 35mm, wide 25mm, laminating by it with roll-type laminating platform; Double-sided adhesive sheet test film is aimed to the edge of the stainless steel plate of thick 2mm, long 150mm, wide 70mm, residual F PC is all bent to the back side of stainless steel plate and fixes, and by the first bonding coat paste List to stainless steel plate front, the end face height between end and the clung body stainless steel plate of the double-sided adhesive sheet test film perk after environmental aging is perk amount.
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| CN201410066143.2A CN103834320A (en) | 2014-02-26 | 2014-02-26 | Re-peel-off type special double-faced adhesive sheet for fixing flexible printed circuit board |
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| CN201410066143.2A CN103834320A (en) | 2014-02-26 | 2014-02-26 | Re-peel-off type special double-faced adhesive sheet for fixing flexible printed circuit board |
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| CN109796890A (en) * | 2019-01-21 | 2019-05-24 | 东莞市澳中电子材料有限公司 | A kind of double-sided pressure-sensitive adhesive tape and the preparation method and application thereof |
| CN110229639A (en) * | 2019-06-24 | 2019-09-13 | 嘉兴艾科新材料科技有限公司 | Composite glue is applied alone in a kind of electronic surface |
| CN110669452A (en) * | 2019-09-26 | 2020-01-10 | 江苏晶华新材料科技有限公司 | Double-sided adhesive tape with base material and application thereof |
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Application publication date: 20140604 |