CN111240071A - Liquid crystal handwriting diaphragm, preparation method thereof and liquid crystal handwriting board - Google Patents
Liquid crystal handwriting diaphragm, preparation method thereof and liquid crystal handwriting board Download PDFInfo
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- CN111240071A CN111240071A CN202010186654.3A CN202010186654A CN111240071A CN 111240071 A CN111240071 A CN 111240071A CN 202010186654 A CN202010186654 A CN 202010186654A CN 111240071 A CN111240071 A CN 111240071A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 168
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 81
- 238000000016 photochemical curing Methods 0.000 claims abstract description 55
- 125000006850 spacer group Chemical group 0.000 claims abstract description 40
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000002861 polymer material Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 154
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 17
- 239000006255 coating slurry Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 238000007765 extrusion coating Methods 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 claims description 8
- 239000003999 initiator Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims 1
- 230000007488 abnormal function Effects 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 14
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000004005 microsphere Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000001132 aluminium potassium sulphate Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 1
- XWQPYRZLNKQZFP-UHFFFAOYSA-N 11-methyldodecyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCCCCCCOC(=O)C(C)=C XWQPYRZLNKQZFP-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- YIJYFLXQHDOQGW-UHFFFAOYSA-N 2-[2,4,6-trioxo-3,5-bis(2-prop-2-enoyloxyethyl)-1,3,5-triazinan-1-yl]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCN1C(=O)N(CCOC(=O)C=C)C(=O)N(CCOC(=O)C=C)C1=O YIJYFLXQHDOQGW-UHFFFAOYSA-N 0.000 description 1
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-UHFFFAOYSA-N 0.000 description 1
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical class C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 1
- 229920000144 PEDOT:PSS Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 1
- 229920006222 acrylic ester polymer Polymers 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
- YMCOIFVFCYKISC-UHFFFAOYSA-N ethoxy-[2-(2,4,6-trimethylbenzoyl)phenyl]phosphinic acid Chemical compound CCOP(O)(=O)c1ccccc1C(=O)c1c(C)cc(C)cc1C YMCOIFVFCYKISC-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 125000002816 methylsulfanyl group Chemical group [H]C([H])([H])S[*] 0.000 description 1
- 125000004573 morpholin-4-yl group Chemical group N1(CCOCC1)* 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- JRWNODXPDGNUPO-UHFFFAOYSA-N oxolane;prop-2-enoic acid Chemical compound C1CCOC1.OC(=O)C=C JRWNODXPDGNUPO-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920005650 polypropylene glycol diacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to the technical field of liquid crystal handwriting boards, in particular to a liquid crystal handwriting diaphragm, a preparation method thereof and a liquid crystal handwriting board. The invention provides a liquid crystal handwriting diaphragm, which comprises a first substrate, a first conducting layer, a liquid crystal layer, a second conducting layer and a second substrate which are sequentially stacked, wherein the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer includes a layer of polymer material and a spacer secured in the layer of polymer material. The liquid crystal layer is divided into the polymer layer with clear boundary and the polymer + liquid crystal layer by adopting the step-by-step photocuring process, and the spacer is fixed in the polymer layer, so that the problem of abnormal functions of the handwriting board caused by uneven dispersion of the spacer in the handwriting diaphragm due to the movement of the spacer caused by writing, cold and hot shrinkage and the like is solved.
Description
Technical Field
The invention relates to the technical field of liquid crystal handwriting boards, in particular to a liquid crystal handwriting diaphragm, a preparation method thereof and a liquid crystal handwriting board.
Background
At present, in the production and preparation process of the existing liquid crystal handwriting board, cholesteric liquid crystal, a spacer and a prepolymer material are generally mixed uniformly and then are sandwiched between two plastic substrates with conductive materials in a coating mode. Due to the cold and hot shrinkage of the plastic substrates, the spacers can flow due to the temporary deformation of the upper and lower plastic substrates. After the deformation is recovered, the spacers cannot return to the original positions, so that the spacers are not arranged at the positions, and the thickness and the uniformity of the liquid crystal layer are influenced; or for a large-size liquid crystal handwriting board, most of the handwriting boards are hung on a wall, and the liquid crystal gravity can flow downwards to cause the spacers to be agglomerated, so that the thickness and uniformity of the liquid crystal layer are also affected, and finally, the writing performance of the liquid crystal handwriting board is abnormal.
Disclosure of Invention
The invention aims to provide a liquid crystal handwriting diaphragm, a preparation method thereof and a liquid crystal handwriting board.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a liquid crystal handwriting diaphragm, which comprises a first substrate, a first conducting layer, a liquid crystal layer, a second conducting layer and a second substrate which are sequentially stacked, wherein the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer comprises a polymer material layer and a spacer fixed in the polymer material layer;
the preparation method of the liquid crystal layer comprises the following steps:
mixing the liquid crystal slurry with the spacer to obtain liquid crystal coating slurry;
coating liquid crystal slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer;
the photocuring is step-by-step photocuring.
Preferably, the area ratio of the spacer to the liquid crystal layer is (0.001-1): 1.
preferably, the granularity of the spacer is 2-10 μm.
Preferably, the step photocuring comprises a first step photocuring and a second step photocuring;
the light intensity of the first step of photocuring is 0.1-5 mW/cm2The first step of photocuring lasts for 0.5-6 min;
the light intensity of the second step of photocuring is 5-15 mW/cm2And the time of the second step of photocuring is 1-10 min.
Preferably, the liquid crystal paste comprises a prepolymer, a liquid crystal and an initiator;
the mass ratio of the prepolymer to the liquid crystal to the initiator is (5-50): (50-95): (0.1-4).
Preferably, the second substrate has a transmittance of 0% to 90%;
the transmittance of the first substrate is 20% -95%.
The invention also provides a preparation method of the liquid crystal handwriting diaphragm, which comprises the following steps:
preparing a first conductive layer on the surface of a first substrate to obtain the first substrate with the first conductive layer;
preparing a second conducting layer on the surface of a second substrate to obtain the second substrate with the second conducting layer;
and preparing a liquid crystal layer between the first substrate with the first conducting layer and the second substrate with the second conducting layer to obtain the liquid crystal handwriting diaphragm.
Preferably, the coating speed of the liquid crystal paste between the first substrate with the first conductive layer and the second substrate with the second conductive layer is 0.1 to 5 m/min.
The invention also provides a liquid crystal handwriting pad which comprises an upper shell, a liquid crystal membrane, a circuit board, a battery and a lower shell which are arranged in sequence, wherein the liquid crystal membrane is the liquid crystal handwriting membrane or the liquid crystal handwriting membrane prepared by the preparation method of the technical scheme.
The invention provides a liquid crystal handwriting diaphragm, which comprises a first substrate, a first conducting layer, a liquid crystal layer, a second conducting layer and a second substrate which are sequentially stacked, wherein the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer comprises a polymer material layer and a spacer fixed in the polymer material layer; the preparation method of the liquid crystal layer comprises the following steps: mixing the liquid crystal slurry with the spacer to obtain liquid crystal coating slurry; coating liquid crystal slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer; the photocuring is step-by-step photocuring. The liquid crystal layer is divided into the polymer layer with clear boundary and the polymer + liquid crystal layer by adopting the step-by-step photocuring process, and the spacer is fixed in the polymer layer, so that the problem of abnormal functions of the handwriting board caused by uneven dispersion of the spacer in the handwriting diaphragm due to the movement of the spacer caused by writing, cold and hot shrinkage and the like is solved. The main principle is that light sequentially passes through a first substrate, a first conducting layer, a liquid crystal coating slurry layer, a second conducting layer and a second substrate from top to bottom. Because the liquid crystal coating slurry can absorb light, light intensity difference is generated, the light intensity is strongest near the first conducting layer, and the light intensity is weakest near the second conducting layer. This phenomenon causes the prepolymer near the first conductive layer to react first to form a polymer, and as the reaction time increases, the concentration of the prepolymer near the first conductive layer decreases, and the concentration of the prepolymer at a high position shifts to a low position to maintain the concentration balance. Meanwhile, the second step of photocuring in the step-by-step photocuring enables the whole reaction layer to be more fully reacted.
Detailed Description
The invention provides a liquid crystal handwriting diaphragm, which comprises a first substrate, a first conducting layer, a liquid crystal layer, a second conducting layer and a second substrate which are sequentially stacked, and is characterized in that the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer comprises a polymer material layer and a spacer fixed in the polymer material layer;
the preparation method of the liquid crystal layer comprises the following steps:
mixing the liquid crystal slurry with the spacer to obtain liquid crystal coating slurry;
coating liquid crystal slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer;
the photocuring is step-by-step photocuring.
In the invention, the liquid crystal handwriting diaphragm comprises a first substrate and a second substrate; the material of the first substrate is preferably Polycarbonate (PC) or polyethylene terephthalate (PET). In the present invention, the transmittance of the first substrate is preferably 20% to 95%, more preferably 50% to 95%, and most preferably 80% to 90%. In a specific embodiment of the invention, the first substrate is specifically Mitsubishi chemical polyester SM07-X12 or light gray AG-T03 with a transmittance of 70%. In the present invention, the thickness of the first substrate is preferably 50 to 500 μm, and more preferably 100 to 200 μm. The material of the first conductive layer is not limited in any way, and the conductive material used in the liquid crystal handwriting film, which is well known to those skilled in the art, can be used. The material of the second substrate is preferably Polycarbonate (PC) or polyethylene terephthalate (PET). In the present invention, the transmittance of the second substrate is preferably 0% to 90%, more preferably 0% to 60%, and most preferably 0% to 45%; in a specific embodiment of the present invention, the second substrate is a black matrix with model number AG-LWB-B01. In the present invention, the thickness of the second substrate is preferably 50 to 500 μm, and more preferably 100 to 200 μm. The material of the second conductive layer is not limited in any way, and the conductive material used in the liquid crystal handwriting film, which is well known to those skilled in the art, can be used.
In the invention, the liquid crystal handwriting diaphragm further comprises a first conducting layer and a second conducting layer; the material of the first conductive layer and the second conductive layer is not limited in any way, and any conductive material known to those skilled in the art may be used.
In the invention, the liquid crystal handwriting film further comprises a liquid crystal layer, and the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer includes a layer of polymer material and a spacer secured in the layer of polymer material. In the present invention, the area ratio of the spacer to the liquid crystal layer is preferably (0.001 to 1): 1, more preferably (0.005-0.8): 1, most preferably (0.002-0.006): 1; the granularity of the spacer is preferably 2-10 μm, and more preferably 5-8 μm. In the invention, the thickness of the liquid crystal layer is preferably 1-10 μm, more preferably 1-5 μm, and most preferably 2-4 μm.
In the invention, the preparation process of the liquid crystal layer comprises the following steps:
mixing the liquid crystal slurry with the spacer to obtain liquid crystal coating slurry;
coating liquid crystal slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer;
the photocuring is step-by-step photocuring.
The liquid crystal coating paste is obtained by mixing the liquid crystal paste with the spacers. In the present invention, the liquid crystal paste preferably includes a prepolymer, a liquid crystal, and an initiator; the mass ratio of the prepolymer to the liquid crystal to the initiator is preferably (5-50): (50-95): (0.1-4), more preferably (10-40): (60-90): (0.5 to 3.5), most preferably (20 to 30): (70-80): (1.5-2.5). The invention does not have any special limitation on the type of the prepolymer, and the prepolymer can be prepared into acrylic polymers, acrylic ester polymers or element organic polymers by adopting the types well known to the technicians in the field; the kind of the liquid crystal is preferably cholesteric liquid crystal; the photoinitiator is preferably an acyl phosphate oxide photoinitiator; the present invention does not specifically limit the kind of the acylphosphine oxide photoinitiator, and any kind of photoinitiator known to those skilled in the art may be used. The invention has no special limitation on the mass ratio of the liquid crystal slurry to the spacer, as long as the area ratio of the spacer to the liquid crystal layer in the prepared liquid crystal layer is (0.001-1): within 1. The present invention does not limit the mixing in any particular way, and the mixing may be carried out by a process known to those skilled in the art.
After the liquid crystal coating slurry is obtained, coating the liquid crystal coating slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer; the photocuring is step-by-step photocuring. In the present invention, the step photocuring preferably includes a first step photocuring and a second step photocuring; the light intensity of the first step of photocuring is preferably 0.1-5 mW/cm2More preferably 0.5 to 4.0mW/cm2Most preferably 1.5 to 3.0mW/cm2(ii) a The first-step photocuring time is preferably 0.5-6 min, more preferably 1-5 min, and most preferably 2-4 min. In the invention, the light intensity of the second step of photocuring is preferably 5-15 mW/cm2More preferably 8-12 mW/cm2Most preferably 9-11 mW/cm2(ii) a The second step of photo-curing is preferably performed for 1-10 min, more preferably for 2-8 min, and most preferably for 4-6 min. In the present invention, the first photo-curing forms a polymer layer on the surface layer of the liquid crystal layer to enhance adhesion, and the second photo-curing functions to deeply cure the prepolymer. In the invention, the liquid crystal layer prepared by the step-by-step photocuring is a polymer layer and a polymer + liquid crystal layer.
The invention also provides a preparation method of the liquid crystal handwriting diaphragm, which comprises the following steps:
preparing a first conductive layer on the surface of a first substrate to obtain the first substrate with the first conductive layer;
preparing a second conducting layer on the surface of a second substrate to obtain the second substrate with the second conducting layer;
and preparing a liquid crystal layer between the first substrate with the first conducting layer and the second substrate with the second conducting layer to obtain the liquid crystal handwriting diaphragm.
Preparing a first conductive layer on the surface of a first substrate to obtain the first substrate with the first conductive layer; and preparing a second conductive layer on the surface of the second substrate to obtain the second substrate with the second conductive layer. The preparation process of the first conductive layer and the second conductive layer is not limited in any way, and can be performed by a process known to those skilled in the art. In the present invention, the preparation of the first conductive layer and the second conductive layer is preferably adjusted conventionally depending on the materials of the first conductive layer and the second conductive layer.
The preparation method of the liquid crystal handwriting diaphragm further comprises the step of preparing a liquid crystal layer between the first substrate with the first conducting layer and the second substrate with the second conducting layer to obtain the liquid crystal handwriting diaphragm. In the present invention, the preparation process preferably refers to the preparation of the liquid crystal layer, which is not described herein again.
The invention also provides a liquid crystal handwriting pad which comprises an upper shell, a liquid crystal handwriting diaphragm, a circuit board, a battery and a lower shell which are arranged in sequence, wherein the liquid crystal handwriting diaphragm is the liquid crystal handwriting diaphragm prepared by the preparation method of the technical scheme or the liquid crystal handwriting diaphragm prepared by the preparation method of the technical scheme.
The liquid crystal handwriting film, the preparation method thereof and the liquid crystal handwriting board provided by the invention are described in detail with reference to the following examples, but the invention is not to be construed as being limited by the scope of the invention.
Example 1
Mitsubishi chemical polyester SM07-X12 was used as a first substrate and a black base material second substrate (thickness 125 μm, 188 μm, respectively) of AG-LWB-B01 was used;
sputtering ITO layers on the surfaces of the first substrate and the second substrate respectively to obtain a first substrate with a first conducting layer and a second substrate with a second conducting layer respectively;
750g of a cholesteric liquid crystal material (fuming in a tabacco, liquid crystal type LC-6T486), 100g of tetrahydrofuran acrylate, 100g of isobornyl acrylate, 30g of tris (2-hydroxyethyl) isocyanurate triacrylate and 20g of ethyl 2,4, 6-trimethylbenzoylphenylphosphonate are mixed under stirring (mixing temperature is 60 ℃ C., time is 12 hours) according to a mass ratio of 75:10:10:3:2 to obtain a liquid crystal slurry;
according to the mass ratio of 500:4, 500g of liquid crystal slurry and 4g of spacer (5 mu m, TN-500 microsphere of Zhenjiang Eiguan) are mixed to obtain liquid crystal coating slurry;
coating liquid crystal coating slurry between the first substrate with the first conductive layer and the second substrate with the second conductive layer by extrusion coating (coating speed is 0.4m/min), and performing photocuring (UV wavelength is 365nm, and light intensity of the first step of photocuring is 2 mW/cm)2For 1 min; the light intensity of the second step of photocuring is 10mW/cm2And the time is 9min), and obtaining the liquid crystal handwriting diaphragm (the area ratio of the spacer to the liquid crystal layer is 0.0015: 1).
Example 2
Mitsubishi chemical polyester SM07-X12 was used as a first substrate and a black base material second substrate (thickness 125 μm, 188 μm, respectively) of AG-LWB-B01 was used;
respectively coating Clevios PH 1000(pedot: pss solution) to the surfaces of a first substrate and a second substrate (the thickness of the obtained wet film is 15 mu m) in a micro-concave coating mode, and curing (140 ℃ and 2min) to obtain the first substrate with the first conductive layer and the second substrate with the second conductive layer;
mixing 800g of cholesteric liquid crystal material (Hebei Meilston electronic material Co., Ltd., MS-N06), 150g of isotridecyl methacrylate, 50g of ethoxylated 1, 6-hexanediol diacrylate, 20gDR-E522 of an acrylic medium molecular weight prepolymer (Taiwan Changxing chemical industry Co., Ltd.) and 15g of 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-acetone under stirring (the mixing temperature is 40 ℃ and the mixing time is 5 hours) according to a mass ratio of 80:15:5:2:1.5 to obtain liquid crystal slurry;
according to the mass ratio of 500:4, 500g of liquid crystal slurry and 4g of spacers (3 mu m, TN-500 microspheres of Zhenjiang Eiguan) are mixed to obtain liquid crystal coating slurry;
applying a liquid crystal coating slurry (coating speed of 0.5m/min) between the first substrate with the first conductive layer and the second substrate with the second conductive layer by extrusion coating, and performing photocuring ((UV wavelength of 365nm, light intensity of the first step of photocuring is 2 mW/cm)2The time is 5 min; the light intensity of the second step of photocuring is 10mW/cm2And the time is 5min), and obtaining the liquid crystal handwriting diaphragm (the area ratio of the spacer to the liquid crystal layer is 0.0026: 1).
Example 3
A first substrate of light gray AG-T03 with a transmittance of 70% and a second substrate of black base material (thickness 125 μm and 188 μm, respectively) of AG-LWB-B01;
respectively coating HQNANO-GR-017-1 (graphene solution, Suzhou carbonox graphene science and technology Co., Ltd.) to the surfaces of the first substrate and the second substrate (the thickness of the obtained wet film is 20 mu m) in a micro-concave coating mode, and curing (150 ℃,10min) to obtain the first substrate with the first conductive layer and the second substrate with the second conductive layer;
mixing 700g of cholesteric liquid crystal material (fuming on a cigarette bench, and the liquid crystal model is LC-111-530), 200g of 2-methoxyethyl acrylate, 50g of polypropylene glycol diacrylate, 30g of DR-E522 acrylic acid type intermediate molecular weight prepolymer (Taiwan Changxing chemical industry Co., Ltd.) and 10g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide under the condition of stirring (the mixing temperature is 40 ℃ and the mixing time is 5 hours) according to the mass ratio of 70:20:5:3:1 to obtain liquid crystal slurry;
according to the mass ratio of 500:4, 500g of liquid crystal slurry and 4g of spacers (4 mu m, TN-500 microspheres of Zhenjiang Eiguan) are mixed to obtain liquid crystal coating slurry;
coating liquid crystal coating slurry between the first substrate with the first conductive layer and the second substrate with the second conductive layer by extrusion coating (coating speed is 0.1m/min), and performing photocuring (UV wavelength is 365nm, light intensity of the first step of photocuring is 3 mW/cm)2For 1 min; the light intensity of the second step of photocuring is 15mW/cm2For 5min) to obtainThe liquid crystal handwriting diaphragm (the area ratio of the spacer to the liquid crystal layer is 0.002: 1).
Example 4
The liquid crystal handwriting films prepared in examples 1 to 3 were assembled in the order of the upper case, the liquid crystal film, the circuit board, the battery and the lower case to prepare a liquid crystal handwriting board.
The space powder-containing conducting layer manufactured by the method adopts the wind speed of 30m/s, the included angle between the wind speed and the conducting layer surface is 20 degrees, the duration is 30s, and the movement of the spacer is not found;
the liquid crystal handwriting pad prepared by the liquid crystal handwriting film prepared in the embodiment 1-3 comprises the following components: the pen tip made of POM material with a diameter of 3mm was used to write 5W back and forth with a force of 300g, and the spacer was moved significantly.
The liquid crystal handwriting film prepared in the embodiment 1-3 is prepared into a large-size liquid crystal film with the thickness of 2.0m 1.2m 1m according to the method, the large-size liquid crystal film is vertically placed, and is respectively placed at 50 ℃ for 7 days, 10 ℃ for 7 x 24 hours, 50 ℃ for 0.5 hour, 10 ℃ for 0.5 hour, and the spacer is not moved after the liquid crystal handwriting film is subjected to cooling and heating circulation (-10 ℃ to 50 ℃) for 7 days.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A liquid crystal handwriting diaphragm comprises a first substrate, a first conducting layer, a liquid crystal layer, a second conducting layer and a second substrate which are sequentially stacked, and is characterized in that the liquid crystal layer comprises a polymer layer and a polymer + liquid crystal layer; the polymer layer comprises a polymer material layer and a spacer fixed in the polymer material layer;
the preparation method of the liquid crystal layer comprises the following steps:
mixing the liquid crystal slurry with the spacer to obtain liquid crystal coating slurry;
coating liquid crystal slurry between the first conducting layer and the second conducting layer in an extrusion coating mode, and carrying out photocuring to obtain the liquid crystal layer;
the photocuring is step-by-step photocuring.
2. The liquid crystal writing film of claim 1, wherein the area ratio of the spacer to the liquid crystal layer is (0.001-1): 1.
3. the liquid crystal writing film of claim 1, wherein the spacer has a particle size of 2 to 10 μm.
4. The liquid crystal handwriting film of claim 1, wherein said step photocuring comprises a first step photocuring and a second step photocuring;
the light intensity of the first step of photocuring is 0.1-5 mW/cm2The first step of photocuring lasts for 0.5-6 min;
the light intensity of the second step of photocuring is 5-15 mW/cm2And the time of the second step of photocuring is 1-10 min.
5. The liquid crystal writing film of claim 1, wherein the liquid crystal paste comprises a prepolymer, a liquid crystal, and an initiator;
the mass ratio of the prepolymer to the liquid crystal to the initiator is (5-50): (50-95): (0.1-4).
6. The liquid crystal handwriting film of claim 1, wherein the transmittance of said second substrate is 0% to 90%;
the transmittance of the first substrate is 20% -95%.
7. The method for preparing the liquid crystal handwriting film of any one of claims 1 to 6, characterized by comprising the following steps:
preparing a first conductive layer on the surface of a first substrate to obtain the first substrate with the first conductive layer;
preparing a second conducting layer on the surface of a second substrate to obtain the second substrate with the second conducting layer;
and preparing a liquid crystal layer between the first substrate with the first conducting layer and the second substrate with the second conducting layer to obtain the liquid crystal handwriting diaphragm.
8. The method according to claim 7, wherein a coating speed of the liquid crystal paste between the first substrate with the first conductive layer and the second substrate with the second conductive layer is 0.1 to 5 m/min.
9. A liquid crystal handwriting pad, which comprises an upper shell, a liquid crystal membrane, a circuit board, a battery and a lower shell which are arranged in sequence, and is characterized in that the liquid crystal membrane is the liquid crystal handwriting membrane of any one of claims 1-6 or the liquid crystal handwriting membrane prepared by the preparation method of claim 7 or 8.
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| JPS60262128A (en) * | 1984-06-08 | 1985-12-25 | Sanyo Electric Co Ltd | Liquid crystal display device |
| US4705360A (en) * | 1982-10-29 | 1987-11-10 | Sharp Kabushiki Kaisha | Liquid crystal display cell and method for manufacturing thereof |
| JPS6336224A (en) * | 1986-07-31 | 1988-02-16 | Victor Co Of Japan Ltd | Liquid crystal display element |
| CN1282951A (en) * | 1999-08-03 | 2001-02-07 | 美能达株式会社 | Manufacturing mathod of liquid crystal display element |
| CN106597702A (en) * | 2016-12-09 | 2017-04-26 | 明基材料有限公司 | Manufacturing method for liquid crystal device, and liquid crystal device manufactured by same |
| TW201920545A (en) * | 2017-08-23 | 2019-06-01 | 日商迪睿合股份有限公司 | Tape with binder layer and spacers dispersed the layer |
| CN110308595A (en) * | 2019-04-18 | 2019-10-08 | 好易写（深圳）科技有限公司 | A kind of preparation process and liquid crystal writing film of liquid crystal writing film |
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2020
- 2020-03-17 CN CN202010186654.3A patent/CN111240071A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4705360A (en) * | 1982-10-29 | 1987-11-10 | Sharp Kabushiki Kaisha | Liquid crystal display cell and method for manufacturing thereof |
| JPS60262128A (en) * | 1984-06-08 | 1985-12-25 | Sanyo Electric Co Ltd | Liquid crystal display device |
| JPS6336224A (en) * | 1986-07-31 | 1988-02-16 | Victor Co Of Japan Ltd | Liquid crystal display element |
| CN1282951A (en) * | 1999-08-03 | 2001-02-07 | 美能达株式会社 | Manufacturing mathod of liquid crystal display element |
| CN106597702A (en) * | 2016-12-09 | 2017-04-26 | 明基材料有限公司 | Manufacturing method for liquid crystal device, and liquid crystal device manufactured by same |
| TW201920545A (en) * | 2017-08-23 | 2019-06-01 | 日商迪睿合股份有限公司 | Tape with binder layer and spacers dispersed the layer |
| CN110308595A (en) * | 2019-04-18 | 2019-10-08 | 好易写（深圳）科技有限公司 | A kind of preparation process and liquid crystal writing film of liquid crystal writing film |
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