CN107153476A - A kind of contact panel, touch-screen and preparation method thereof - Google Patents

A kind of contact panel, touch-screen and preparation method thereof Download PDF

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Publication number
CN107153476A
CN107153476A CN201610415437.0A CN201610415437A CN107153476A CN 107153476 A CN107153476 A CN 107153476A CN 201610415437 A CN201610415437 A CN 201610415437A CN 107153476 A CN107153476 A CN 107153476A
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CN
China
Prior art keywords
touch
cover plate
time
screen
screen cover
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Pending
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CN201610415437.0A
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Chinese (zh)
Inventor
陈君
李涛
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Shanghai Copious Optical S & T Co Ltd
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Shanghai Copious Optical S & T Co Ltd
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Priority to CN201610415437.0A priority Critical patent/CN107153476A/en
Publication of CN107153476A publication Critical patent/CN107153476A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The invention discloses a kind of contact panel, touch-screen and preparation method thereof.Contact panel includes a touch sensing, a bonding film, one first touch-screen cover plate, a PVB intermediate layers and one second touch-screen cover plate successively;The softening point of first touch-screen cover plate and the second touch-screen cover plate is more than 250 DEG C.The contact panel production efficiency of the present invention is high;Touched in head in test and show 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

A kind of contact panel, touch-screen and preparation method thereof
Technical field
The present invention relates to a kind of 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 contact panel, touch-screen and preparation method thereof for the defect of full hidden danger.The contact panel production efficiency of the present invention It is high;Touched in head in test and show outstanding;Show outstanding in environmental reliability test, no degumming phenomenon, bubble-free is produced, 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 height, Wear-resistant, service life length, touch sensitivity are 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 thinner thickness of touch-screen cover plate, it is extremely fragile, therefore higher is required to preparation process condition.The present inventor is led to Cross it is a large amount of experimental studies have found that, using PVB film as adhesive layer, by touch-screen cover plate made from the preparation method of the present invention, Can not only solve above-mentioned technical problem, and can effectively solve the easy bubble of product, double 85 tests (85 DEG C × 85RH × 500h) afterwards bubble bounce-back etc. technical problem.
The present invention solves above-mentioned technical problem by the following technical programs.
The invention provides a kind of contact panel, it includes a touch sensing, a bonding film, one first touch successively Shield cover plate, a PVB intermediate layers and one second touch-screen cover plate;Wherein, the first touch-screen cover plate and second touch-screen The softening point of 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 of the bonding film can be OCA optical cements commonly used in the art or OCR optics trees Fat.The thickness of the bonding film is that this area is conventional, preferably 125~250 μm.
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 physical and chemical parameter of the PVB film is ability Domain is conventional, preferably:Proportion 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, shrinkage factor is < 3.0%, and tensile strength is >=200kg/cra, and elongation at break is >=200%, elongation percentage >= 70%.The thickness of the PVB film is that this area is conventional, and preferably 0.38~1.52mm is more preferably 0.38mm, 0.76mm Or 1.14mm.
In the present invention, the first touch-screen cover plate and the second touch-screen cover plate are that the conventional softening point in this area exists More than 250 DEG C of touch-screen cover plate, is preferably glass cover-plate or sapphire cover plate.
In the present invention, the thickness of the first touch-screen cover plate and the second touch-screen cover plate is conventional for this area, compared with It is goodly 0.2~0.4mm, is more preferably 0.3mm.
Present invention also offers a kind of preparation method of the contact panel, it comprises the steps:
(1) the first touch-screen cover plate, PVB film and the second touch-screen cover plate are closed after piece, carries out preliminary heating zone Pressure, after cooling, obtains PVB interlayer touch-screen cover plates;
Wherein, the softening point of the first touch-screen cover plate and the second touch-screen cover plate is described more than 250 DEG C The operation of 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 In section preheating lamination, temperature is 170~230 DEG C, and the time is 1~10min;
(2) after the PVB interlayer touch-screen cover plates obtained by step (1) being exhausted, pressed, be cooled to 40~50 DEG C it is laggard Row pressure release, obtains contact panel precursor;Wherein, the temperature of the pressing is 120~140 DEG C, the pressure of the pressing for 8~ 15bar;
(3) it is and described by the first touch-screen cover plate or the second touch-screen cover plate of the contact panel precursor obtained by step (2) After touch sensing is by OCA optical cements or the laminating of OCR optical resins, contact panel is produced.
In step (1), according to common sense in the field, the size of the PVB film is than the first touch-screen cover plate or described The averagely big 0.5~1.0mm of size of second touch-screen cover plate, to ensure that two layers of touch-screen cover plate can be pasted completely during follow-up laminating Close.
In step (1), before the operation for closing piece, typically according to this area it is conventional to the first touch-screen cover plate and The second touch-screen cover plate is pre-processed.The pretreatment is this area routine operation, after preferably first being cleaned, Dry again.The operation of the cleaning and condition are that this area is conventional, are preferably cleaned using ultrasonic wave.The drying Operation and condition are that this area is conventional, are 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 the first 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 described The center of first touch-screen cover plate, the second touch-screen cover plate is positioned over 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 PVB interlayers touch-screen cover plate is usually according to reality before the operation of the exhaust is carried out Border demand, cuts to the PVB interlayers touch-screen cover plate.The method and condition of the cutting are the conventional method in this area And condition, it is general to use CNC engraving machines (Computer numerical control, also referred to as abbreviation CNC, numerical controlled carving Machine) cut.
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 PVB interlayers touch-screen cover plate is put into the operation that autoclave carries out the exhaust in 4h;More The PVB interlayers touch-screen cover plate is put into the operation that autoclave carries out the exhaust in 2h goodly.
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 Temperature is to the temperature of the pressing, second of insulation at a temperature of the pressing, second of boosting in second of insulating process To 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 It is incubated for the first time in 20~30min, first time insulating process afterwards, boosts to 3~4bar, Zhi Hou for the first time in 8~15min The temperature of the pressing is warming up in 30~40min for the second time, second of insulation at a temperature of the pressing is protected at second During temperature, 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 be incubated 20~30min, in first time insulating process, boost to 3.5bar for the first time in 8~15min, afterwards 30~ The temperature of the pressing is warming up in 40min for the second time, second of insulation, was incubated for the second time at a temperature of the pressing Cheng Zhong, boosts to the pressure of the pressing for the second time in 10~15min.
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, preferably 1~2h.
In step (3), the operation of the laminating and condition be operation conventional in the contact panel preparation process of this area and Condition.
In step (3), the OCA optical cements or OCR optical resins can for OCA optical cements commonly used in the art or OCR optical resins, the bonding film formed after the laminating in the contact panel.
In the present invention, in the preparation process of the contact panel, time this area used is conventional, to ensure production 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 the first glass cover-plate, and 2 be PVB intermediate layers, 3 It is bonding film for the second glass cover-plate, 4,5 be touch sensing.
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 the first glass cover-plate, and 2 be PVB intermediate layers, and 3 are Second glass cover-plate, 4 be bonding film, and 5 be touch sensing, and 6 be foam double-faced adhesive, and 7 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 bonding film successively from the bottom up (125 μm), one second glass cover-plate (0.3mm), a PVB intermediate layers (0.38mm) and one first glass cover-plate (0.3mm).Fig. 1 For the structural representation of the contact panel of embodiment 1, wherein, 1 is the first glass cover-plate, and 2 be PVB intermediate layers, and 3 be the second glass cover Plate, 4 be bonding film, and 5 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, and the PVB film peripheral size after cross cutting is averagely bigger than the first contact glass cover plate or the second glass cover-plate size 0.5~1mm, to ensure that layer glass cover plate can fit completely during follow-up laminating;
(2) clean:First glass cover-plate and the second glass cover-plate are cleaned with ultrasonic wave;
(3) dry:The first glass cover-plate and the second glass cover-plate after using clean compressed air, step (2) is cleaned Drying, must ensure disposable drying;
(4) piece is closed:First the first glass cover-plate is inverted on platform, it would be desirable to which the one side of laminating is placed upward;Again will step Suddenly the PVB film after (1) cross cutting is positioned over the center of the first glass cover-plate, and the second glass cover-plate is positioned in PVB film Center;
During aforesaid operations, it need to ensure:PVB film tiles naturally, and nothing is mingled with, without folding line;Layer glass cover plate it is interior Frame size is alignd with PVB film, 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, PVB interlayer touch-screen cover plates are obtained;
The surface of PVB interlayer touch-screen cover plates is naturally cooled to 60 DEG C or so;The edge of PVB interlayer touch-screen cover plates is in Transparence, centre is in vaporific or close to transparent and have irregular exhaust lay out;
(6) unloading piece is shelved:
PVB interlayer touch-screen cover plates obtained by step (5) are unloaded from laminating machine, support, support institute is put into order Having must can all be wrapped up with the place of PVB interlayer touch-screen cover plates with high temperature resistant rubber (the high temperature resistant rubber can not be too soft), The direct contacting metal rod of PVB interlayer touch-screen cover plates can not be made;
PVB interlayer touch-screen cover plates are usually that according to the actual requirements, PVB is pressed from both sides before the operation of following exhausts is carried out Layer touch-screen cover plate is cut.The method and condition of cutting are the conventional method and condition in this area, general to be carved using CNC Machine (Computer numerical control, also referred to as abbreviation CNC, digital-controlled carving machine) is cut;
(7) PVB interlayer touch-screen cover plates are put into 2h after autoclave is exhausted, presses, 45 is cooled to through 40min Pressure release (venting duration is 90min) is carried out after DEG C, contact panel precursor is obtained, unloading piece simultaneously detects (whether the folded difference of inspection is uniform, whether there is Bubble);
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;
(7) by the first touch-screen cover plate or the second touch-screen cover plate of the contact panel precursor obtained by step (6), with touch-control After sensor is by OCA optical cements or the laminating of OCR optical resins, contact panel is produced.
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 (thickness 0.8mm), a bonding film (125 μm), one second glass cover-plate (0.3mm), in the middle of a PVB Layer (0.38mm) and one first glass cover-plate (0.3mm).Fig. 3 is the structural representation of the touch-screen of embodiment 1, wherein, 1 is first Glass cover-plate, 2 be PVB intermediate layers, and 3 be the second glass cover-plate, and 4 be bonding film, and 5 be touch sensing, and 6 be that foam is two-sided Glue, 7 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 Produced with the laminating of this area conventional method.
Embodiment 2
The contact panel of the present embodiment includes a touch sensing (thickness 0.5mm), a bonding film successively from the bottom up (500 μm), one second glass cover-plate (0.2mm), a PVB intermediate layers (1.52mm) and one first glass cover-plate (0.2mm).
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 (1.2mm), a foam double-faced adhesive (100 μ successively from the bottom up M), a touch sensing (thickness 0.5mm), a bonding film (500 μm), one second glass cover-plate (0.2mm), in the middle of a PVB Layer (1.52mm) and one first glass cover-plate (0.2mm).
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 bonding film successively from the bottom up (250 μm), one second glass cover-plate (0.4mm), a PVB intermediate layers (0.76mm) and one first glass cover-plate (0.4mm).
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 (250 μ successively from the bottom up M), a touch sensing (thickness 0.5mm), a bonding film (250 μm), one second glass cover-plate (0.4mm), in the middle of a PVB Layer (0.76mm) and one first glass cover-plate (0.4mm).
Touch-screen preparation method is same as Example 1.
Embodiment 4
The contact panel of the present embodiment includes a touch sensing (thickness 0.8mm), a bonding film successively from the bottom up (125 μm), one second glass cover-plate (0.3mm), a PVB intermediate layers (1.14mm) and one first 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 (100 μ successively from the bottom up M), a touch sensing (thickness 0.8mm), a bonding film (125 μm), one second glass cover-plate (0.3mm), in the middle of a PVB Layer (1.14mm) and one first glass cover-plate (0.3mm).
Touch-screen preparation method is same as 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.
Table 1
Contact panel reliability testing (double 85 tests, high temperature deposit 95 DEG C, -40 DEG C of low-temp storage) performance of embodiment 1 Preferably, bubble comes unglued rate (rebound rate) below 10% after test;Effectively solve existing contact panel and touch survey in head The safety problem that fragment splashes in examination.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.
The effect of the products obtained therefrom of embodiment 2~4 is suitable with the effect of embodiment 1.

Claims (10)

1. a kind of contact panel, it is characterised in that it includes a touch sensing, a bonding film, one first touch-screen successively Cover plate, a PVB intermediate layers and one second touch-screen cover plate;Wherein, the first touch-screen cover plate and the second touch-screen lid The softening point of plate is more than 250 DEG C.
2. contact panel as claimed in claim 1, it is characterised in that the thickness of the touch sensing is 0.5~0.8mm;
And/or, the thickness of the bonding film is 125~250 μm;
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 first touch-screen cover plate and the second touch-screen cover plate are glass cover-plate or sapphire cover plate;
And/or, the thickness of the first touch-screen cover plate and the second touch-screen cover plate is 0.2~0.4mm, preferably 0.3mm。
3. a kind of preparation method of contact panel as claimed in claim 1 or 2, it is characterised in that it comprises the steps:
(1) the first touch-screen cover plate, PVB film and the second touch-screen cover plate are closed after piece, carries out preheating lamination, it is cold But after, PVB interlayer touch-screen cover plates are obtained;
Wherein, the softening point of the first touch-screen cover plate and the second touch-screen cover plate is more than 250 DEG C, the preheating The operation of 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 is pre- In heat lamination, temperature is 170~230 DEG C, and the time is 1~10min;
(2) after the PVB interlayer touch-screen cover plates obtained by step (1) being exhausted, pressed, let out after being cooled to 40~50 DEG C Pressure, obtains contact panel precursor;Wherein, the temperature of the pressing is 120~140 DEG C, and the pressure of the pressing is 8~15bar;
(3) by the first touch-screen cover plate or the second touch-screen cover plate of the contact panel precursor obtained by step (2), with the touch-control After sensor is by OCA optical cements or the laminating of OCR optical resins, contact panel is produced.
4. preparation method as claimed in claim 3, it is characterised in that in step (1), described before the operation for closing piece First touch-screen cover plate and the second touch-screen cover plate are first pre-processed;The operation of the pretreatment is first to be cleaned Afterwards, then dry;The cleaning is preferably cleaned using ultrasonic wave;The drying preferably uses compressed air once Property drying;
And/or, in step (1), the operation for closing piece is carried out in the steps below:The first touch-screen cover plate is inverted in flat On platform, it would be desirable to which the one side of laminating is placed upward;The PVB film is positioned over to the center of the first touch-screen cover plate, will The second touch-screen cover plate is positioned over the center of the PVB film.
5. preparation method as claimed in claim 3, 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, and 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, in step (1), the mode of the cooling is natural cooling;Temperature after the cooling is preferably 50~70 DEG C, it is more preferably 60 DEG C.
6. preparation method as claimed in claim 3, it is characterised in that put into the PVB interlayers touch-screen cover plate in 4h Autoclave carries out the operation of the exhaust;The PVB interlayers touch-screen cover plate is preferably put into autoclave in 2h and carries out institute State 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, Boosted for the first time in first time insulating process, be warming up to the temperature of the pressing for the second time again afterwards, in the temperature of the pressing Lower second of insulation, boosts to the pressure of the pressing for the second time in second of insulating process;Wherein, the operation of the exhaust Preferably carry out in the steps below:In 20~30min, 20~30min is incubated for the first time after 57~63 DEG C are warming up to for the first time, In first time insulating process, 3~4bar is boosted to for the first time in 8~15min, second of heating in 30~40min afterwards To the temperature of the pressing, second of insulation at a temperature of the pressing, in second of insulating process, in 10~15min The pressure of the pressing is inside boosted to for the second time;Wherein, the operation of the exhaust is more preferably carried out in the steps below:20~ In 30min, it is warming up to for the first time after 60 DEG C and is incubated 20~30min for the first time, in first time insulating process, in 8~15min 3.5bar is once boosted to, the temperature of the pressing is warming up to for the second time in 30~40min afterwards, in the temperature of the pressing Lower second of insulation, in second of insulating process, boosts to the pressure of the pressing for the second time in 10~15min.
7. preparation method as claimed in claim 3, 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.
8. a kind of touch-screen, it is characterised in that it is double that it includes a described contact panel as claimed in claim 1 or 2, a foam successively Face glue and a liquid crystal display.
9. touch-screen as claimed in claim 1, it is characterised in that the thickness of the foam double-faced adhesive is 100~500 μm, compared with It is 250 μm goodly;
And/or, the thickness of the liquid crystal display is 1.2~1.5mm.
10. a kind of preparation method of touch-screen as claimed in claim 8 or 9, it is characterised in that it comprises the steps:Will The touch sensing of the contact panel is fitted with the liquid crystal display by the foam double-faced adhesive.
CN201610415437.0A 2016-06-14 2016-06-14 A kind of contact panel, touch-screen and preparation method thereof Pending CN107153476A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107704138A (en) * 2017-11-01 2018-02-16 四川皇泽光电科技有限公司 A kind of applying method of touch-screen and the preparation method of touch-screen and touch-screen
CN110557899A (en) * 2019-08-28 2019-12-10 广合科技(广州)有限公司 method for processing expansion and shrinkage of PCB finished board
CN110750182A (en) * 2019-10-17 2020-02-04 业成科技(成都)有限公司 Capacitive touch module and display screen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107704138A (en) * 2017-11-01 2018-02-16 四川皇泽光电科技有限公司 A kind of applying method of touch-screen and the preparation method of touch-screen and touch-screen
CN110557899A (en) * 2019-08-28 2019-12-10 广合科技(广州)有限公司 method for processing expansion and shrinkage of PCB finished board
CN110750182A (en) * 2019-10-17 2020-02-04 业成科技(成都)有限公司 Capacitive touch module and display screen
CN110750182B (en) * 2019-10-17 2022-05-06 业成科技(成都)有限公司 Capacitive touch module and display screen

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