A kind of transparent optical adhesive film and preparation method with dispersed LCD
Technical field
The present invention relates to field of adhesive technology, more particularly to a kind of transparent optical adhesive film and system with dispersed LCD
Preparation Method.
Background technology
Touch-screen is because having the advantages that ease for operation, flexibility, it has also become PMC equipment and integrated information are whole
Hold primary human's interactive meanses of (such as mobile phone, tablet personal computer and super notebook computer).Relative to resistive touch screen and its
The touch-screen of its mode, capacitive touch screen are gradually made extensively so that cost is low, advantage simple in construction and durable etc. by intelligent terminal
With.However, existing capacitance touch screen only perceives touch location and the operation of screen body place plane, it is difficult to which support is applied orthogonal to
The touch parameter that the pressure change in screen body surface face is brought.
Therefore, Apple companies increase extra force snesor below touch-screen Touch sensor side and cover plate,
Realize the pressure sensitive function of equipment;And Synaptics notebook computer employs pressure-sensitive Trackpad, it passes through multiple power
Sensor and surface are coupled to realize the detections of the power to multiple applications on the surface.
In summary, when pressure sensitive function is realized by way of increasing force snesor, force snesor is required to additionally
Conducting channel cabling, cause that device is more complicated, production cost is higher.
The content of the invention
It is an object of the invention to propose a kind of transparent optical adhesive film and preparation method with dispersed LCD, Neng Goushi
Existing pressure sensitive touch controllable function, cost is low, and it is easy to make.
To use following technical scheme up to this purpose, the present invention:
The present invention provides a kind of transparent optical adhesive film with dispersed LCD, including the optics being formed by curing by optical cement
Glue-line, be arranged at the optical cement layer upper surface heavy release layer, be arranged at the optical cement layer lower surface it is light release
Layer, by mass percentage, the optical cement includes following material:
Performed polymer glue, 70~98%, such as 70%, 75%, 84%, 90%, 98%;
Liquid crystal droplet, 0.5~30%, such as 0.5%, 5%, 15%, 20%, 30%;
Additive, 0.5~25%, such as 0.5%, 5%, 15%, 20%, 30%;
Wherein, the liquid crystal droplet is scattered in the mixture of the performed polymer glue and the additive.
Preferably, the performed polymer glue is polymerized by polymer monomer, and the polymer monomer is esters of acrylic acid list
Body, epoxy resin monomer, silane-modified epoxy resin class monomer, organic silica gel monomer, polyester unsaturated monomer, polyurethane list
One kind in body or at least two.
Preferably, liquid crystal droplet is dispersed in the mixture of the performed polymer glue and the additive.
Preferably, the additive includes curing agent, the additive also comprising antioxidant, coupling agent, plasticizer with
And one kind in modifying agent or at least two.
Preferably, the curing agent is light trigger.
Preferably, the curing agent thermal curing agents, the thermal curing agents are aliphatic category polyamines or triethylene tetramine.
Preferably, the light trigger be benzoin and its derivative, benzil and its derivative, acetophenone derivs,
Alpha-alcohol ketone derivative, alpha-amino ketone derivative, benzoyl formic acid esters, acyl group phosphorous oxides, benzophenone and its derivative,
One or more in thioxanthone and its derivative and anthraquinone and its derivative.
Preferably, the preparation method of the optical cement, comprises the following steps:
Step 1, the preliminary polycondensation reaction of polymer monomer form high molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, 0.5~30% nematic liquid crystal, 70~98% step 1 are obtained
To performed polymer glue, 0.5~25% additive uniformly mix, under light or thermal excitation, polycondensation further occurs for performed polymer glue
Reaction, mixture of the nematic liquid crystal progressively with performed polymer glue and additive separate, and nematic liquid crystal forms liquid crystal droplet
And be dispersed in the mixture of performed polymer glue and additive, obtain optical cement.
The present invention also provides a kind of preparation method of the transparent optical adhesive film with dispersed LCD, comprises the following steps:
Step 1, the light mould release membrance of the light release layer is tiled;
Step 2, the optical cement is coated on to the surface of the light mould release membrance of the step 1;
Step 3, in the case where light or heat further excite, the optical cement in the step 2 is solidified, and forms optics
Glue-line;
Step 4, after the completion of solidification, the heavy mould release membrance of the heavy release layer is laid in the optics of the step 3
The surface of glue-line, obtain the transparent optical adhesive film with dispersed LCD.
In the present invention, nematic liquid crystal just refers to the liquid crystal being under nematic phase.In general, according to temperature and material
The difference of characteristic, liquid crystal can be in a series of some phase in different phases.And there is a kind of special nematic liquid crystal
Referred to as twisted nematic (TN) liquid crystal, it is distortion in its natural state, and after electric current is added to this liquid crystal, they will be according to
The alive corresponding angle of size reverse twist of institute, reaction of this liquid crystal for electric current is very accurate, therefore can be used to
The circulation of light is controlled, so as to for manufacturing LCD.Molecules align direction in nematic liquid crystal depends on director, and director can
To be any material, such as magnetic field or the surface for having trickle cutting.Nematic liquid crystal can be according to intermolecular relative orientation
It is further to be classified.Smectic phase is most common arrangement mode, and molecule arranges layer by layer.Smectic phase has the change of many again
Body, such as the molecules align direction of every layer of c-type smectic phase liquid crystal with respect to last layer is in certain angle of inclination.It is another common
It is mutually cholesterol phase, or is called chiral nematic phase.In this phase, there is slight torsion in every layer of molecules align direction with adjacent layer
Song, so as to form a spiral helicine structure.
Because the liquid crystal molecule in liquid crystal droplet has dielectric anisotropy, when the situation that optical adhesive film extrudes in stress
Under, the orientation of the liquid crystal molecule of the liquid crystal droplet in optical adhesive film can change, and then the dielectric constant of liquid crystal molecule can increase
Greatly, therefore, the dielectric constant of optical cement layer can also change., will driving electrodes and sensing by the change of dielectric constant
Interelectrode electric capacity produces change, and then realizes the monitoring of stress sensing.
Beneficial effects of the present invention are:
The present invention the transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer,
Heavy release layer, the light release layer for the lower surface for being arranged at the optical cement layer for being arranged at the upper surface of the optical cement layer, are pressed
Mass percent meter, the optical cement include following material:Performed polymer glue 70~98%, liquid crystal droplet 0.5~30%, additive
0.5~25%, the liquid crystal droplet is scattered in the mixture of the performed polymer glue and the additive;It passes through in performed polymer
Be dispersed with liquid crystal droplet in glue, thus when optical adhesive film replaces common optical adhesive film to be applied to the making of touch-screen, when by
During to external force, scattered liquid crystal droplet by from it is initial it is spherical be changed into elliposoidal, thus the liquid crystal molecule in liquid crystal droplet takes
To from it is spherical it is radially oriented be aligned in elliposoidal close to change is collectively aligned, cause the dielectric constant of liquid crystal droplet can become
Greatly, therefore the electric capacity in the corresponding capacitance plate by the optical adhesive film preparation of liquid crystal droplet between driving electrodes and induction electrode becomes
Greatly, and the capacitance signal directly can carry out signal detection by the process chip IC of capacitance plate, so as to realize stress shape
The detection of condition, it can be replaced in the prior art by the way of sensor, and mode is simple, and cost is low.
Brief description of the drawings
Fig. 1 is structural representation of the optical cement layer of the optical adhesive film of the present invention in first beginning and end stress and hand under state
Figure.
Fig. 2 is the structural representation for the capacitance plate for applying the optical adhesive film of the present invention.
In figure:1- optical adhesive films;2- upper stratas sensor;3- underlying transducers;4- cover sheets;The common glue of 5-.
Embodiment
1-2 and technical scheme is further illustrated by embodiment below in conjunction with the accompanying drawings.
Embodiment one
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 70%;Liquid crystal droplet, 15%;Additive, 15%;Wherein, liquid crystal droplet is uniform
It is scattered in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger is benzoin and its derivative
Thing.When curing agent is thermal curing agents, and thermal curing agents are aliphatic category polyamines or triethylene tetramine, optical cement layer is heat curing-type light
Learn glue-line.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is acrylate
Class monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, the preliminary polycondensation reaction of acrylic ester monomer form high molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, performed polymer glue that the step of 15% nematic liquid crystal, 70% one is obtained,
15% additive uniformly mixes, and under light or thermal excitation, polycondensation reaction further occurs for performed polymer glue, and nematic liquid crystal is progressively
Separated with the mixture of performed polymer glue and additive, nematic liquid crystal forms liquid crystal droplet and is dispersed in performed polymer glue and adds
In the mixture for adding agent, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
Embodiment two
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 75%;Liquid crystal droplet, 5%;Additive, 20%;Wherein, liquid crystal droplet uniformly divides
Dissipate in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger is benzil and its derivative
Thing.When curing agent is thermal curing agents, and thermal curing agents are aliphatic category polyamines or triethylene tetramine, optical cement layer is heat curing-type light
Learn glue-line.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is epoxy resin
Class monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, the preliminary polycondensation reaction of epoxy resin monomer form high molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, performed polymer glue that the step of 5% nematic liquid crystal, 75% one is obtained,
20% additive uniformly mixes, and under light or thermal excitation, polycondensation reaction further occurs for performed polymer glue, and nematic liquid crystal is progressively
Separated with the mixture of performed polymer glue and additive, nematic liquid crystal forms liquid crystal droplet and is dispersed in performed polymer glue and adds
In the mixture for adding agent, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
Embodiment three
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 80%;Liquid crystal droplet, 19.5%;Additive, 0.5%;Wherein, liquid crystal droplet is equal
It is even to be scattered in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger is acetophenone derivs.When
Curing agent is thermal curing agents, and when thermal curing agents are aliphatic category polyamines or triethylene tetramine, optical cement layer is heat curing-type optical cement
Layer.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is silane-modified
Epoxy resin monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, the preliminary polycondensation reaction of silane-modified epoxy resin class monomer form high molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, by one obtained performed polymer the step of 19.5% nematic liquid crystal, 80%
Glue, 0.5% additive uniformly mix, and under light or thermal excitation, polycondensation reaction, nematic liquid crystal further occur for performed polymer glue
Progressively the mixture with performed polymer glue and additive separates, and nematic liquid crystal forms liquid crystal droplet and is dispersed in performed polymer glue
In the mixture of additive, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
Example IV
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 85%;Liquid crystal droplet, 10%;Additive, 5%;Wherein, liquid crystal droplet uniformly divides
Dissipate in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger be alpha-alcohol ketone derivative,
The mixture of alpha-amino ketone derivative.When curing agent is thermal curing agents, thermal curing agents are aliphatic category polyamines or triethylene tetramine
When, optical cement layer is heat curing-type optical cement layer.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is organic silica gel
Monomer, polyester unsaturated monomer, the mixture of urethane monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, organic silica gel monomer, polyester unsaturated monomer, the preliminary polycondensation reaction of the mixture of urethane monomer are formed
High molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, performed polymer glue that the step of 10% nematic liquid crystal, 85% one is obtained,
5% additive uniformly mixes, and under light or thermal excitation, polycondensation reaction further occurs for performed polymer glue, and nematic liquid crystal is progressively
Separated with the mixture of performed polymer glue and additive, nematic liquid crystal forms liquid crystal droplet and is dispersed in performed polymer glue and adds
In the mixture for adding agent, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
Embodiment five
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 90%;Liquid crystal droplet, 7.5%;Additive, 2.5%;Wherein, liquid crystal droplet is equal
It is even to be scattered in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger be benzoyl formic acid esters,
The mixture of acyl group phosphorous oxides, benzophenone and its derivative, thioxanthone and its derivative and anthraquinone and its derivative.When
Curing agent is thermal curing agents, and when thermal curing agents are aliphatic category polyamines or triethylene tetramine, optical cement layer is heat curing-type optical cement
Layer.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is epoxy resin
The mixture of class monomer, silane-modified epoxy resin class monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, the preliminary polycondensation reaction of mixture of epoxy resin monomer, silane-modified epoxy resin class monomer are formed
High molecular polymer, i.e. performed polymer glue;
Step 2, by mass percentage, performed polymer glue that the step of 7.5% nematic liquid crystal, 90% one is obtained,
2.5% additive uniformly mixes, and under light or thermal excitation, polycondensation reaction further occurs for performed polymer glue, nematic liquid crystal by
Step separated with the mixture of performed polymer glue and additive, nematic liquid crystal formation liquid crystal droplet and be dispersed in performed polymer glue with
In the mixture of curing agent, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
Embodiment six
A kind of transparent optical adhesive film with dispersed LCD, including be formed by curing by optical cement optical cement layer, set
Heavy release layer in the upper surface of optical cement layer, be arranged at optical cement layer lower surface light release layer, by mass percentage,
Optical cement includes following material:Performed polymer glue, 98%;Liquid crystal droplet, 1.5%;Additive, 0.5%;Wherein, liquid crystal droplet is equal
It is even to be scattered in the mixture of performed polymer glue and additive.
Wherein, additive is the mixture of curing agent, antioxidant, coupling agent, plasticizer and modifying agent.Work as curing agent
For light trigger when, optical cement layer is light curable type optical cement layer.In the present embodiment, light trigger is benzophenone and its derivative
Thing.When curing agent is thermal curing agents, and thermal curing agents are aliphatic category polyamines or triethylene tetramine, optical cement layer is heat curing-type light
Learn glue-line.
Preferably, in the present embodiment, performed polymer glue is polymerized by polymer monomer, and polymer monomer is acrylate
Class monomer, epoxy resin monomer, silane-modified epoxy resin class monomer, organic silica gel monomer, polyester unsaturated monomer, poly- ammonia
The mixture of ester monomer.Therefore, the preparation method of optical cement, comprises the following steps:
Step 1, acrylic ester monomer, epoxy resin monomer, silane-modified epoxy resin class monomer, organic silica gel
The preliminary polycondensation reaction of monomer, polyester unsaturated monomer, the mixture of urethane monomer forms high molecular polymer, i.e. performed polymer
Glue;
Step 2, by mass percentage, performed polymer glue that the step of 1.5% nematic liquid crystal, 98% one is obtained,
0.5% additive uniformly mixes, and under light or thermal excitation, polycondensation reaction further occurs for performed polymer glue, nematic liquid crystal by
Step separated with the mixture of performed polymer glue and additive, nematic liquid crystal formation liquid crystal droplet and be dispersed in performed polymer glue with
In the mixture of additive, optical cement is obtained.
After optical cement is prepared, it is possible to prepare optical adhesive film, comprise the following steps:
Step 1, the light mould release membrance of light release layer is tiled;
Step 2, the above-mentioned optical cement being prepared is coated on to the surface of the light mould release membrance of step 1;
Step 3, in the case where light or heat further excite, the optical cement in step 2 is solidified, and forms optical cement layer;
Step 4, after the completion of solidification, the heavy mould release membrance of weight release layer is laid in the surface of the optical cement layer of step 3, obtained
To the transparent optical adhesive film with dispersed LCD.
In summary, the optical adhesive film prepared by above-described embodiment, it is when by external force, Jie of liquid crystal droplet
Electric constant can all become big, thus when the optical adhesive film of the present invention directly replaces making of the common optical cement applied to touch-screen
When so that touch-screen has the function of detecting the power put on touch-screen.
As shown in figure 1, the structural representation for optical adhesive film of the invention under first beginning and end stress and stress.
As shown in Fig. 2 the structural representation of the touch-screen for the optical adhesive film of the application present invention.The touch-screen is GFF structures, touch-screen
Top be cover sheet 4, the bottom of cover sheet 4 is bonded with upper strata sensor 2 by common glue 5, upper strata sensor 2
Bottom is provided with underlying transducer 3, and the optical adhesive film 1 of the present invention is provided between upper strata sensor 2 and underlying transducer 3, is passed through
Optical adhesive film 1 bonds together upper strata sensor 2 and underlying transducer 3.Upper strata sensor 2 is contained by surface covered with surface
The PET film of independent array ito electrode patterns is formed, and underlying transducer 3 contains independent array covered with surface by surface
The PET film of formula ito electrode patterns is formed, and the array ito electrodes in upper strata sensor 2 and underlying transducer 3 are in projection side
Cross section be present upwards.
When touch-screen is pressurized, the electric capacity that the electrode of optical adhesive film and its upper and lower both sides is formed can be because of the optics of dispersed LCD
The dielectric constant of glued membrane increases and reduced, and is become by the numerical value for detecting the electric capacity that both sides crossed electrode is formed above and below optical adhesive film
Change, it is possible to realize the purpose of the size of detection touch-control pressure;Meanwhile the positional information of touch-control can be detected by capacitance plate,
It is final touch-screen is realized the detection to the three-dimensional information (position and stress) of touch condition, the three-dimensional touch of this touch-screen
Mode is simple, cost is low.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel would not require any inventive effort the other embodiments that can associate the present invention, and these modes are fallen within
Within protection scope of the present invention.