CN107153477A - The application of PVB film, contact panel, touch-screen and preparation method thereof - Google Patents
The application of PVB film, contact panel, touch-screen and preparation method thereof Download PDFInfo
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- CN107153477A CN107153477A CN201610421394.7A CN201610421394A CN107153477A CN 107153477 A CN107153477 A CN 107153477A CN 201610421394 A CN201610421394 A CN 201610421394A CN 107153477 A CN107153477 A CN 107153477A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000003825 pressing Methods 0.000 claims description 37
- 238000003475 lamination Methods 0.000 claims description 33
- 239000011521 glass Substances 0.000 claims description 31
- 239000002243 precursor Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 239000004973 liquid crystal related substance Substances 0.000 claims description 17
- 239000006260 foam Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 238000010792 warming Methods 0.000 claims description 14
- 238000010030 laminating Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 229910052594 sapphire Inorganic materials 0.000 claims description 2
- 239000010980 sapphire Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 21
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 49
- 239000010410 layer Substances 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 14
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 239000004568 cement Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000005336 safety glass Substances 0.000 description 2
- 238000010897 surface acoustic wave method Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention discloses a kind of application of PVB film, contact panel, touch-screen and preparation method thereof.Contact panel includes a touch sensing, a PVB intermediate layers and a touch-screen cover plate successively；The softening point of touch-screen cover plate is more than 250 DEG C.PVB film is applied to touch-screen field by the present invention, and obtained contact panel touches in test in head and shows outstanding；Show outstanding in environmental reliability test：In the environmental reliability project testing such as hot and humid (85 DEG C × 85%RH × 500h), high temperature storage (85 DEG C × 500h), low-temp storage (40 DEG C × 500h), without degumming phenomenon, bubble-free is produced, and bubble rebound rate is relatively low；The safety problem of test is touched due to solving head, touch-screen can use G+G structures so that touch-screen hardness is high, wear-resistant, service life length, touch sensitivity high.
Description
Technical field
The present invention relates to a kind of application of PVB film, contact panel, touch-screen and preparation method thereof.
Background technology
Touch-screen includes contact panel (English touch panel, abbreviation TP, also known as " touch screen ") and liquid crystal display
(LCD) it is, a kind of induction type liquid crystal display device for receiving the input signals such as contact, when contacting the graphic button on screen
When, the haptic feedback system on screen can drive various link devices according to the formula of preprogramming, mechanical available for substitution
Push button panel, and produce by liquid crystal display picture lively visual and sound effects.Touch-screen is defeated as a kind of newest computer
Enter equipment, it be it is most simple at present, conveniently, a kind of natural man-machine interaction mode.It imparts multimedia with brand-new looks,
It is extremely attractive brand-new multimedia interactive equipment.It is mainly used in vehicle mounted guidance (middle control), mobile phone, Industry Control, military affairs
Commander, electronic game, choosing song or selecting dish, multimedia teaching, real estate presell etc..
According to the operation principle and the medium of transmission information of touch-screen, touch-screen is divided into four kinds, they are respectively resistance
Formula, capacitor induction type, infrared-type and surface acoustic wave type.Wherein, infrared-type and surface acoustic wave touch screen are due to its work
Make the difference of mode, be not suitable for open air, the application in terms of vehicle-mounted product, mobile phone is restricted.Resistive touch screen
Surface because the requirement of its operation principle is, it is necessary to which surface curvature senses, hardness is relatively low, easily causes scuffing, response speed compared with
And multi-point touch relatively difficult to achieve slowly,.And capacitor induction type touch-screen can be good at solving asking for resistive touch screen presence
Topic, in industries such as current vehicle-mounted, mobile phone, the consumer goods, resistive touch screen is just gradually by capacitor induction type touch-screen to substituting.
The surface of existing contact panel is one layer of touch-screen cover plate, and touch-screen cover plate passes through OCA optical cements
(Optically Clear Adhesive) or OCR optical resins (Optically Clear Resin) and touch sensing
(Sensor) laminating formation is carried out.The material of traditional touch-screen cover plate is mainly glass, and glass has hardness height, cost cheap
Advantage, therefore it is most widely used.But it is due to Glass breadks easily, and with the viscosity of OCA optical cements or OCR optical resins not
Foot, impact strength is poor, therefore is touched in head in test and show poor, and fractionlet is easily produced after being impacted, and those are broken
Piece can not be bonded and fixed on touch sensing by OCA optical cements or OCR optical resins, there is potential safety hazard.In addition, in recent years
A kind of compound resin cover plate is risen, due to the outstanding representation that compound resin cover plate is touched in test in head, is had started to gradually major
Manufacturer is received.But, compound resin cover plate is also not so good as glass material, Er Qieyou there is also certain defect, such as case hardness
In the particularity of surface treatment, its production cost is higher.At present, those problems demands are solved.
The content of the invention
The technical problems to be solved by the invention are overcome in the prior art because cover plate is frangible, with OCA optical cements or
The viscosity of OCR optical resins is not enough, and impact strength is poor, is touched in head in test and shows poor, easily produced after being impacted
Fractionlet, and those fragments can not be bonded and fixed on touch sensing by OCA optical cements or OCR optical resins, there is peace
There is provided a kind of application of PVB film, contact panel, touch-screen and preparation method thereof for the defect of full hidden danger.The touch-control of the present invention
Panel production efficiency is high；Touched in head in test and show outstanding；Show outstanding in environmental reliability test, no degumming phenomenon, nothing
Bubble is produced, and bubble rebound rate is relatively low；The safety problem of test is touched due to solving head, touch-screen can use G+G structures so that
Touch-screen hardness is high, wear-resistant, service life length, touch sensitivity high.
When PVB film is applied to touch-screen field by the present inventor, need to apply pressure during laminating, so
And due to the electro-conductive glass on touch sensing and the thinner thickness of touch-screen cover plate, it is extremely fragile, therefore to preparation process condition
It is required that higher.The present inventor is had found by lot of experiments, using PVB film as adhesive layer, passes through the present invention's
Touch-screen made from preparation method, can not only solve above-mentioned technical problem, and can effectively solve the easy bubble of product, it is double
85 test (85 DEG C × 85RH × 500h) technical problem such as bubble bounce-back afterwards.
The present invention solves above-mentioned technical problem by the following technical programs.
The invention provides a kind of application of PVB film in touch screen technology field is prepared.
In the present invention, the PVB film plays bonding between the touch sensing and touch-screen cover plate in contact panel
Effect, forms PVB intermediate layers.
Present invention also offers a kind of contact panel (abbreviation TP), it includes a touch sensing, a PVB intermediate layers successively
With a touch-screen cover plate；Wherein, the softening point of the touch-screen cover plate is more than 250 DEG C.
In the present invention, the touch sensing (Sensor) is conventional use of touch sensing in the art, and its is general
Including electro-conductive glass, FPC winding displacements and control card.Under normal circumstances, in contact panel, the electro-conductive glass of touch sensing with
Touch-screen cover plate is connected by OCA optical cements or OCR optical resins, in the present invention, and the electro-conductive glass of touch sensing is with touching
Screen cover plate is touched to connect by PVB intermediate layers.The thickness of the touch sensing is that this area is conventional, preferably 0.5~
0.8mm。
In the present invention, the raw material in the PVB intermediate layers can be that (full name is the conventional use of PVB film in safety glass field
Polyvinyl butyral resin intermediate coat, and referred to as PVB films or PVB intermediate coats).The PVB film is that safety glass routinely makes
PVB film, its physical and chemical parameter is preferably：Proportion is 1.073, and refractive index is 1.524, and specific heat is 0.4~0.5cal/
G DEG C, softening point is 117~120 DEG C, and shrinkage factor is ＜ 3.0%, and tensile strength is >=200kg/cra, elongation at break for >=
200%, elongation percentage >=70%.The thickness of the PVB film is that this area is conventional, preferably 0.38~1.52mm, more preferably
For 0.38mm, 0.76mm or 1.14mm.
In the present invention, the touch-screen cover plate is touch-screen cover plate of the conventional softening point in this area more than 250 DEG C, preferably
Ground is glass cover-plate or sapphire cover plate.
In the present invention, the thickness of the touch-screen cover plate is conventional for this area, preferably 0.3~1.0mm, more preferably for
0.6mm。
Present invention also offers a kind of preparation method of the contact panel, it comprises the steps：
(1) the touch-screen cover plate, PVB film and the touch sensing are closed after piece, carries out preheating lamination, cooling
Afterwards, contact panel precursor is obtained；
Wherein, the softening point of the touch-screen cover plate is more than 250 DEG C, and the operation of the preheating lamination is divided to two sections of progress：
In first paragraph preheating lamination, temperature is 70~140 DEG C, and the time is 1~10min；Second segment preheating lamination in, temperature be 170~
230 DEG C, the time is 1~10min；
(2) after the contact panel precursor obtained by step (1) being exhausted, pressed, let out after being cooled to 40~50 DEG C
Pressure, obtains contact panel；Wherein, the temperature of the pressing is 120~140 DEG C, and the pressure of the pressing is 8~15bar.
In step (1), according to common sense in the field, the size of the touch-screen cover plate is more than the size of the PVB film.Institute
Size averagely big 0.5~1.0mm of the size than the touch sensing of PVB film is stated, to ensure described during follow-up laminating touch
Touching screen cover plate and the touch sensing can fit completely.
In the present invention, the PVB film in step (1) is turning into the touch surface after step (1) and step (2)
PVB middle film layers in plate.
In step (1), the touch-screen cover plate and the touch sensing are before the operation for closing piece is carried out, typically
Routinely pre-processed according to this area.The pretreatment is this area routine operation, after preferably first being cleaned, then is dried
It is dry.The operation of the cleaning and condition are that this area is conventional, are preferably cleaned using ultrasonic wave.The operation of the drying
It is that this area is conventional with condition, is preferably disposably dried up using clean compressed air.
In step (1), the operation for closing piece and condition are that this area is conventional, are preferably carried out in the steps below：By institute
State touch-screen cover plate to invert on platform, it would be desirable to which the one side of laminating is placed upward；The PVB film is positioned over the touch
Shield the center of cover plate, the touch sensing is positioned over to the center of the PVB film.
In step (1), in the first paragraph preheating lamination, the pressure is that this area is conventional, preferably 2~6bar,
More preferably it is 3~4bar.
In step (1), in the first paragraph preheating lamination and second segment preheating lamination, the vacuum is this area
It is conventional, preferably≤10-1Bar, is more preferably 10-3~10-1bar。
In step (1), in first paragraph preheating lamination, the temperature is preferably 100~120 DEG C, the time compared with
It is 2~4min goodly.
In step (1), in the second segment preheating lamination, the pressure is that this area is conventional, preferably 6~8bar,
More preferably it is 7bar.
In step (1), in second segment preheating lamination, the temperature is preferably 200~220 DEG C, the time compared with
It is 2~4min goodly.
In step (1), the mode of the cooling is conventional for this area, preferably natural cooling.Temperature after the cooling
Spend conventional for this area, preferably 50~70 DEG C, be more preferably 60 DEG C.
In step (2), the process of the operating of the exhaust, the operation of the pressing and the cooling, generally in high pressure
Carried out in kettle.It is preferred that the contact panel precursor is put into the operation that autoclave carries out the exhaust in 4h；More preferably will
The contact panel precursor puts into the operation that autoclave carries out the exhaust in 2h.
In step (2), the operation of the exhaust and condition are the conventional operation in this area and condition, preferably by following steps
It is rapid to carry out：First time heating is carried out, it is rear to be incubated for the first time, boosted for the first time in first time insulating process, again second liter afterwards
After temperature to the temperature of the pressing, second of insulation at a temperature of the pressing, second liter in second of insulating process
It is depressed into the pressure of the pressing；
The operation of the exhaust is more preferably carried out in the steps below：In 20~30min, 57~63 DEG C are warming up to for the first time
20~30min of insulation for the first time, boosts to 3~4bar in first time insulating process for the first time afterwards, afterwards the in 30~40min
After secondary temperature elevation to the temperature of the pressing, the pressure of the pressing is boosted to for the second time in 10~15min；
The operation of the exhaust is most preferably carried out in the steps below：In 20~30min, is warming up to after 60 DEG C for the first time
Once it is incubated in 20~30min, first time insulating process and boosts to 3.5bar for the first time, afterwards second in 30~40min
The temperature of the pressing is warming up to, second is incubated at a temperature of the pressing, in second of insulating process, 10~
The pressure of the pressing is boosted in 15min for the second time.
In step (2), the temperature of the pressing is preferably 130~135 DEG C.The pressure of the pressing is preferably 9~
13bar, is more preferably 11bar.
In step (2), the time of the pressing is conventional for this area, preferably 30~40min.
In step (2), if the temperature of the pressure release is not in the range of 40~50 DEG C, obtained product is easily caused
Product edge produces bubble.
In step (2), the temperature of the pressure release is preferably 41~45 DEG C, is more preferably 42 DEG C.
In step (2), the time of the pressure release is conventional for this area, in order to ensure the production efficiency of product, preferably 1
~2h.
In the present invention, in the preparation process of the contact panel, time this area used is conventional, in order to ensure the life of product
Produce efficiency, preferably 2~10h.
Present invention also offers a kind of touch-screen, it includes an above-mentioned contact panel, a foam double-faced adhesive and a liquid successively
Crystal display (LCD).
In the present invention, the foam double-faced adhesive is foam double-faced adhesive commonly used in the art.The foam double-faced adhesive
Thickness is that this area is conventional, and preferably 100~500 μm, be more preferably 250 μm.Under normal circumstances, the touch-control of contact panel is passed
Electro-conductive glass in sensor is connected with liquid crystal display by foam double-faced adhesive.
In the present invention, the liquid crystal display is the conventional liquid crystal display in this area.The thickness of the liquid crystal display
Preferably 1.2~1.5mm.
Present invention also offers a kind of preparation method of the touch-screen, it comprises the steps：By the contact panel
Touch sensing fitted with the liquid crystal display by the foam double-faced adhesive.
In the present invention, the operation of the laminating and condition are operation conventional in the preparation process of this area touch-screen and bar
Part.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, and produce each preferable reality of the present invention
Example.
The present invention is raw materials used commercially available.
The positive effect of the present invention is：
The contact panel production efficiency of the present invention is high；Touched in head in test and show outstanding：Even if screen surface is by impact cutting
Broken, fragment can be fixed on image sensing display, the phenomenon for being not in splashes and hurting sb.'s feelings；In environmental reliability test
Middle performance is outstanding：In hot and humid (85 DEG C × 85%RH × 500h), high temperature storage (85 DEG C × 500h), (- 40 DEG C of low-temp storage
× 500h) etc. in environmental reliability project testing, no degumming phenomenon, bubble-free is produced, and bubble rebound rate is relatively low；Due to solving
Head touches the safety problem of test, and touch-screen can use G+G structures so that touch-screen hardness is high, wear-resistant, service life length, tactile
Touch sensitivity high.
Brief description of the drawings
Fig. 1 is the structural representation of the contact panel of embodiment 1, wherein, 1 is glass cover-plate, and 2 be PVB intermediate layers, and 3 be tactile
Control sensor.
Fig. 2 is that embodiment 1 preheats temperature of the product in autoclave after lamination terminates, pressure and changed with time song
Line.
Fig. 3 is the structural representation of the touch-screen of embodiment 1, wherein, 1 is glass cover-plate, and 2 be PVB intermediate layers, and 3 be touch-control
Sensor, 4 be foam double-faced adhesive, and 5 be liquid crystal display.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.The experimental method of unreceipted actual conditions in the following example, conventionally and condition, or according to business
Product specification is selected.
The PVB film used in following embodiments is (full name for polyvinyl butyral resin intermediate coat, and referred to as PVB films
Or PVB intermediate coats) physical and chemical parameter is：Proportion is 1.073, and refractive index is 1.524, and specific heat is 0.4~0.5cal/g DEG C, softening
Point is 117~120 DEG C, and shrinkage factor is ＜ 3.0%, and tensile strength is >=200kg/cra, and elongation at break is >=200%, extension
Rate >=70%.
Embodiment 1
The contact panel of the present embodiment includes a touch sensing (thickness 0.8mm), a PVB intermediate layers successively from the bottom up
(0.38mm) and glass cover-plate (0.6mm).Fig. 1 is the structural representation of the contact panel of embodiment 1, wherein, 1 is glass cover
Plate, 2 be PVB intermediate layers, and 3 be touch sensing.
Contact panel preparation method comprises the steps：
(1) PVB film is die cut：In thousand grades of dust-free workshops, according to actual requirement, by PVB film according to touch sensing
Size is die cut, the PVB film peripheral size after cross cutting than touch sensing the averagely big 0.5~1mm of size, after guarantee
The complete laminating of glass cover-plate and touch sensing during continuous laminating；
(2) clean：Glass cover-plate and touch sensing are cleaned with ultrasonic wave；
(3) dry：Glass cover-plate and touch sensing after using clean compressed air, step (2) is cleaned are dried up,
Disposable drying must be ensured；
(4) piece is closed：First glass cover-plate is inverted on platform, it would be desirable to which the one side of laminating is placed upward；Again by step (1)
PVB film after cross cutting is positioned over the center of glass cover-plate, and touch sensing is positioned in the center of PVB film；
During aforesaid operations, it need to ensure：PVB film tiles naturally, and nothing is mingled with, without folding line；The inside casing chi of glass cover-plate
Very little, PVB film is alignd with touch sensing, is folded difference and is ensured that periphery is uniform as far as possible；
(5) preheating lamination：The product after piece is closed to step (4) and carries out precompressed and preliminary exhaust；
The product that step (4) is closed after piece is preheated using laminating machine (can be according to piece platform size, batch places lamination)
The operation of lamination, preheating lamination is divided to two sections of progress：
In first paragraph preheating lamination, temperature is 100 DEG C, and pressure is 3bar, and the time is 2min, and vacuum is≤10-1bar；
In second segment preheating lamination, temperature is 200 DEG C, and pressure is 7bar, and the time is 2min, and vacuum is≤10-1bar；By second segment
After preheating lamination, contact panel precursor is obtained；
The surface of contact panel precursor is naturally cooled to 60 DEG C or so；The transparent shape of edge of contact panel precursor, in
Between in vaporific or close to transparent and have irregular exhaust lay out；
(6) unloading piece is shelved：
Contact panel precursor obtained by step (5) is unloaded from laminating machine, support is put into order, support is all can
It must all be wrapped up with the place of contact panel precursor thereof with high temperature resistant rubber (the high temperature resistant rubber can not be too soft), can not make to touch
Control the direct contacting metal rod of panel precursor；
(7) contact panel precursor is put into 2h after autoclave is exhausted, presses, after being cooled to 45 DEG C through 40min
Pressure release (venting duration is 90min) is carried out, contact panel is obtained, unloading piece simultaneously detects and (checks whether folded difference is uniform, there is bubble-free)；
Wherein, the operation of exhaust is carried out in the steps below：In 30min, it is incubated for the first time after 60 DEG C are warming up to for the first time
3~3.5bar is boosted to for the first time in 20min, first time insulating process, is warming up to the temperature of pressing for the second time in 40min afterwards
Spend after (130~135 DEG C), boost to the pressure (11bar) of pressing for the second time in 10min；
The temperature of pressing is 130~135 DEG C, and the pressure of pressing is 11bar, and pressing time is 40min；
Specific visible Fig. 2, Fig. 2 be embodiment 1 preheat temperature of the product after lamination terminates in autoclave, pressure with
The change curve of time.
The touch-screen of the present embodiment includes a liquid crystal display (1.2mm), a foam double-faced adhesive (500 μ successively from the bottom up
M), a touch sensing, a PVB intermediate layers and a glass cover-plate.Fig. 3 is the structural representation of the touch-screen of embodiment 1, wherein, 1
It is PVB intermediate layers for glass cover-plate, 2,3 be touch sensing, and 4 be foam double-faced adhesive, and 5 be liquid crystal display.
Touch-screen preparation method comprises the steps：
The electro-conductive glass of the touch sensing of above-mentioned contact panel is adopted with liquid crystal display (LCD) by foam double-faced adhesive
Fitted with this area conventional method.
Embodiment 2
The contact panel of the present embodiment includes a touch sensing (thickness 0.5mm), a PVB intermediate layers successively from the bottom up
(0.76mm) and glass cover-plate (1.0mm).
Contact panel preparation method is in addition to parameters described below, and remaining is same as Example 1：
In step (5), in first paragraph preheating lamination process, temperature is 120 DEG C, and pressure is 4bar, and the time is 4min, vacuum
Spend for 10-3bar；In second segment preheating lamination, temperature is 220 DEG C, and pressure is 8bar, and the time is 4min, and vacuum is 10-3bar；
The surface of contact panel precursor is naturally cooled to 50 DEG C or so；
In step (7), the operation of exhaust is carried out in the steps below：In 20min, it is warming up to for the first time after 57 DEG C for the first time
It is incubated in 30min, first time insulating process and boosts to 4bar for the first time, is warming up to the temperature of pressing for the second time in 30min afterwards
Spend after (140 DEG C), boost to the pressure (13bar) of pressing for the second time in 15min；Pressing time is 30min；It is cooled to 42 DEG C
Pressure release, venting duration is 2h.
The touch-screen of the present embodiment includes a liquid crystal display (1.5mm), a foam double-faced adhesive (250 μ successively from the bottom up
M), a touch sensing, a PVB intermediate layers and a glass cover-plate.
Touch-screen preparation method is same as Example 1.
Embodiment 3
The contact panel of the present embodiment includes a touch sensing (thickness 0.5mm), a PVB intermediate layers successively from the bottom up
(1.52mm) and glass cover-plate (0.3mm).
Contact panel preparation method is in addition to parameters described below, and remaining is same as Example 1：
In step (5), in first paragraph preheating lamination process, temperature is 70 DEG C, and pressure is 6bar, and the time is 10min；Second
In section preheating lamination, temperature is 170 DEG C, and pressure is 6bar, and the time is 10min；By the surface natural cooling of contact panel precursor
To 70 DEG C or so；
In step (7), the operation of exhaust is carried out in the steps below：In 20min, it is warming up to for the first time after 63 DEG C for the first time
It is incubated in 30min, first time insulating process and boosts to 3bar for the first time, is warming up to the temperature of pressing for the second time in 30min afterwards
Spend after (120 DEG C), boost to the pressure (15bar) of pressing for the second time in 15min；40 DEG C of pressure releases are cooled to, venting duration is
1h。
The touch-screen of the present embodiment includes a liquid crystal display (1.5mm), a foam double-faced adhesive (100 μ successively from the bottom up
M), a touch sensing, a PVB intermediate layers and a glass cover-plate.
Touch-screen preparation method is same as Example 1.
Embodiment 4
The contact panel of the present embodiment includes a touch sensing (thickness 0.5mm), a PVB intermediate layers successively from the bottom up
(1.14mm) and glass cover-plate (0.3mm).
Contact panel preparation method is in addition to parameters described below, and remaining is same as Example 1：
In step (5), in first paragraph preheating lamination process, temperature is 140 DEG C, and pressure is 2bar, and the time is 1min；Second
In section preheating lamination, temperature is 230 DEG C, and pressure is 6bar, and the time is 6min；The surface of contact panel precursor is naturally cooled to
60 DEG C or so；
In step (7), 130 DEG C of the temperature of pressing, the pressure 8bar of pressing；50 DEG C of pressure releases are cooled to, venting duration is 1h.
The touch-screen of the present embodiment includes a liquid crystal display (1.2mm), a foam double-faced adhesive (150 μ successively from the bottom up
M), a touch sensing, a PVB intermediate layers and a glass cover-plate.
Touch-screen preparation method is same as Example 1.
Comparative example 1
PVB film in embodiment 1 is changed to the conventional OCA optical cements in this area by this comparative example, conventional according to this area
Condition and parameter, touch sensing is connected with glass cover-plate by OCA optical cements, and corresponding contact panel is made.
Effect example
The contact panel of embodiment 1 is subjected to performance test, specific test condition and structure are as shown in table 1.
As shown in Table 1, embodiment 1 contact panel reliability testing (it is double 85 test, high temperature deposit 95 DEG C, low-temp storage-
40 DEG C) show preferable, bubble comes unglued rate (rebound rate) below 10% after test；Effectively solve existing contact panel
The safety problem that fragment splashes in test is touched in head.The safety problem of test is touched due to solving head, touch-screen can be using G+G knots
Structure so that touch-screen hardness is high, wear-resistant, service life length, touch sensitivity high.
The effect of the products obtained therefrom of embodiment 2~4 is suitable with the effect of embodiment 1.
Table 1
Claims (10)
1. a kind of application of PVB film in touch screen technology field is prepared.
2. a kind of contact panel, it is characterised in that it includes a touch sensing, a PVB intermediate layers and a touch-screen lid successively
Plate；Wherein, the softening point of the touch-screen cover plate is more than 250 DEG C.
3. contact panel as claimed in claim 2, it is characterised in that the thickness of the touch sensing is 0.5~0.8mm；
And/or, the raw material in the PVB intermediate layers is PVB film, wherein, the physical and chemical parameter of the PVB film is preferably：Than
Weight is 1.073, and refractive index is 1.524, and specific heat is 0.4~0.5cal/g DEG C, and softening point is 117~120 DEG C, and shrinkage factor is ＜
3.0%, tensile strength is >=200kg/cra, and elongation at break is >=200%, elongation percentage >=70%；The thickness of the PVB film
Degree is preferably 0.38~1.52mm, is more preferably 0.38mm, 0.76mm or 1.14mm；
And/or, the touch-screen cover plate is glass cover-plate or sapphire cover plate；
And/or, the thickness of the touch-screen cover plate is 0.3~1.0mm, preferably 0.6mm.
4. a kind of preparation method of contact panel as claimed in claim 2 or claim 3, it is characterised in that it comprises the steps：
(1) the touch-screen cover plate, PVB film and the touch sensing are closed after piece, carries out preheating lamination, after cooling, obtain
Contact panel precursor；
Wherein, the softening point of the touch-screen cover plate is more than 250 DEG C, and the operation of the preheating lamination is divided to two sections of progress：First
In section preheating lamination, temperature is 70~140 DEG C, and the time is 1~10min；In second segment preheating lamination, temperature is 170~230
DEG C, the time is 1~10min；
(2) after the contact panel precursor obtained by step (1) being exhausted, pressed, it is cooled to after 40~50 DEG C and carries out pressure release, obtain
Contact panel；Wherein, the temperature of the pressing is 120~140 DEG C, and the pressure of the pressing is 8~15bar.
5. preparation method as claimed in claim 4, it is characterised in that in step (1), described before the operation for closing piece
Touch-screen cover plate and the touch sensing are first pre-processed；The operation of the pretreatment is after first being cleaned, then is dried；
The cleaning is preferably cleaned using ultrasonic wave；The drying is preferably disposably dried up using compressed air；
And/or, in step (1), the operation for closing piece is carried out in the steps below：The touch-screen cover plate is inverted in platform
On, it would be desirable to the one side of laminating is placed upward；The PVB film is positioned over to the center of the touch-screen cover plate, touched described
Control sensor is positioned over the center of the PVB film.
6. preparation method as claimed in claim 4, it is characterised in that in step (1), in the first paragraph preheating lamination, institute
Pressure is stated for 2~6bar, preferably 3~4bar；The temperature is 100~120 DEG C；The time is 2~4min；
And/or, in step (1), in the first paragraph preheating lamination and second segment preheating lamination, the vacuum is≤10-1Bar, preferably 10-3~10-1bar；
And/or, in step (1), in the second segment preheating lamination, the pressure is 6~8bar, preferably 7bar；It is described
Temperature is 200~220 DEG C, and the time is 2~4min；
And/or, the mode of the cooling is natural cooling；Temperature after the cooling is preferably 50~70 DEG C, more preferably for
60℃。
7. preparation method as claimed in claim 4, it is characterised in that in step (2), by the contact panel precursor in 4h
Put into the operation that autoclave carries out the exhaust；The contact panel precursor is preferably put into autoclave progress in 2h described
The operation of exhaust；
And/or, in step (2), the operation of the exhaust is carried out in the steps below：First time heating is carried out, it is rear to be incubated for the first time,
Boost, be warming up to for the second time after the temperature of the pressing again afterwards for the first time in first time insulating process, in the temperature of the pressing
Lower second of the insulation of degree, boosts to the pressure of the pressing for the second time in second of insulating process；Wherein, the behaviour of the exhaust
Work is preferably carried out in the steps below：In 20~30min, be warming up to for the first time after 57~63 DEG C and be incubated 20 for the first time~
3~4bar is boosted to for the first time in 30min, first time insulating process, is warming up to the pressure for the second time in 30~40min afterwards
After the temperature of conjunction, the pressure of the pressing is boosted to for the second time in 10~15min；Wherein, the operation of the exhaust is more preferably
Carry out in the steps below：In 20~30min, it is warming up to for the first time after 60 DEG C and is incubated 20~30min for the first time, is incubated for the first time
During boost to 3.5bar for the first time, the temperature of the pressing is warming up to for the second time in 30~40min afterwards, in the pressure
Second of insulation, in second of insulating process, boosts to the pressure of the pressing for the second time in 10~15min at a temperature of conjunction
Power.
8. preparation method as claimed in claim 4, it is characterised in that in step (2), the temperature of the pressing is 130~135
℃；The pressure of the pressing is 9~13bar, preferably 11bar；
And/or, in step (2), the time of the pressing is 30~40min；
And/or, in step (2), the temperature of the pressure release is 41~45 DEG C, preferably 42 DEG C；
And/or, in step (2), the time of the pressure release is 1~2h；
And/or, in the preparation process of the contact panel, the time used is 2~10h.
9. a kind of touch-screen, it includes a contact panel as claimed in claim 2 or claim 3, a foam double-faced adhesive and a liquid successively
Crystal display；
Wherein, the thickness of the foam double-faced adhesive is preferably 100~500 μm, is more preferably 250 μm；The liquid crystal display
Thickness be preferably 1.2~1.5mm.
10. a kind of preparation method of touch-screen as claimed in claim 9, it is characterised in that it comprises the steps：Will be described
The touch sensing of contact panel is fitted with the liquid crystal display by the foam double-faced adhesive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610421394.7A CN107153477A (en) | 2016-06-14 | 2016-06-14 | The application of PVB film, contact panel, touch-screen and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610421394.7A CN107153477A (en) | 2016-06-14 | 2016-06-14 | The application of PVB film, contact panel, touch-screen and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520832A (en) * | 2011-12-19 | 2012-06-27 | 协晶电子科技(上海)有限公司 | Multifunctional touch induction desktop and touch display device with same |
| CN103744554A (en) * | 2014-01-06 | 2014-04-23 | 深圳市正星光电技术有限公司 | Touch screen and manufacturing method thereof |
| WO2016041259A1 (en) * | 2014-09-18 | 2016-03-24 | 京东方科技集团股份有限公司 | Touch screen and manufacturing method therefor and display device |
| CN205880840U (en) * | 2016-06-14 | 2017-01-11 | 上海科比斯光学科技有限公司 | Touch panel and touch -sensitive screen |
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| CN102520832A (en) * | 2011-12-19 | 2012-06-27 | 协晶电子科技(上海)有限公司 | Multifunctional touch induction desktop and touch display device with same |
| CN103744554A (en) * | 2014-01-06 | 2014-04-23 | 深圳市正星光电技术有限公司 | Touch screen and manufacturing method thereof |
| WO2016041259A1 (en) * | 2014-09-18 | 2016-03-24 | 京东方科技集团股份有限公司 | Touch screen and manufacturing method therefor and display device |
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Application publication date: 20170912 |