CN111141408A - A water cup with a liquid crystal temperature card and its manufacturing method - Google Patents
A water cup with a liquid crystal temperature card and its manufacturing method Download PDFInfo
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- CN111141408A CN111141408A CN202010052098.0A CN202010052098A CN111141408A CN 111141408 A CN111141408 A CN 111141408A CN 202010052098 A CN202010052098 A CN 202010052098A CN 111141408 A CN111141408 A CN 111141408A
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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/18—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of materials which change translucency
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/22—Drinking vessels or saucers used for table service
- A47G19/2205—Drinking glasses or vessels
- A47G19/2227—Drinking glasses or vessels with means for amusing or giving information to the user
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/16—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials
- G01K11/165—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials of organic 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/22—Drinking vessels or saucers used for table service
- A47G19/2205—Drinking glasses or vessels
- A47G19/2227—Drinking glasses or vessels with means for amusing or giving information to the user
- A47G2019/225—Drinking glasses or vessels with means for amusing or giving information to the user vessels with thermometers
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Dispersion Chemistry (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
Abstract
本发明为一种带有液晶温度卡的水杯及其制造方法，该水杯装配有液晶温度卡，该液晶温度卡由两张透明胶片夹多片按序排列的聚合物分散液晶热敏调光膜胶片构成。透明胶片中的液晶具有不同的清亮点温度，所述聚合物分散液晶热敏调光膜胶片中包括液晶和与该液晶平均折射率相近的紫外光固化聚合物及间隔子，所述液晶为长螺距胆甾相液晶，其螺距为0.5微米以上，其平均折射率为1.6～1.64时，对应紫外光固化聚合物的折射率也为1.6～1.64。该水杯在实现显示温度的前提下，成本更低，无需电学器件，应用将更广泛。
The invention relates to a water cup with a liquid crystal temperature card and a manufacturing method thereof. The water cup is equipped with a liquid crystal temperature card. The liquid crystal temperature card is composed of two transparent films sandwiched by a plurality of polymer-dispersed liquid crystal heat-sensitive light-adjusting films arranged in sequence. Film composition. The liquid crystal in the transparent film has different clearing point temperatures, and the polymer-dispersed liquid crystal heat-sensitive dimming film film includes liquid crystal, a UV-curable polymer with an average refractive index similar to the liquid crystal, and a spacer, and the liquid crystal is long. When the pitch of the cholesteric liquid crystal is more than 0.5 micron and the average refractive index is 1.6-1.64, the refractive index of the corresponding UV-curable polymer is also 1.6-1.64. On the premise of realizing the display temperature, the water cup has a lower cost, does not require electrical devices, and has wider applications.
Description
Technical Field
The invention belongs to the technical field of manufacturing of water cups with temperature display functions, and particularly relates to a water cup with a passive non-electronic display liquid crystal temperature card and a manufacturing method thereof.
Background
The thermos cup is a common household appliance, a common thermos cup, namely a glass vacuum interlayer thermos cup or a stainless steel vacuum interlayer thermos cup, and has no temperature indication function, so that inconvenience is brought to tea making or hot water drinking in use. Science and technology changes the life, for making the thermos cup have the temperature display function, various intelligent cups are produced at the same time, have had many kinds of thermos cup patent products that have touch screen liquid crystal display on the market. However, since these products belong to active display devices (with battery circuit display), the technology is complex, the manufacturing is troublesome, the cost is high, the selling price is expensive, and the batteries are required to be replaced, so that the products are positioned to be high-end consumer goods, high-grade luxury gifts- 'boss cups'. If the vacuum cup with the temperature indication function is loaded, embedded and assembled on a traditional alcohol thermometer, a mercury thermometer and the like, the vacuum cup can be called a first-generation passive non-electronic vacuum cup with the temperature indication function (which is clumsy), and then a pointer type thermometer (thermally induced elastic deformation) with a thermal sensor is loaded, embedded and assembled on the vacuum cup, and can be called a second-generation passive non-electronic vacuum cup with the temperature indication function. The invention provides a water cup with a liquid crystal temperature card and a manufacturing method thereof, which can be called as a third-generation passive non-electronic water cup or a vacuum cup with a temperature indicating function and is expected to be widely applied to middle and low-grade water cups or vacuum cups.
Disclosure of Invention
The invention provides a water cup with a liquid crystal temperature card and a manufacturing method thereof, aiming at manufacturing a novel third-generation passive non-electronic vacuum cup with a temperature indicating function. The water cup has the advantages of lower cost, no need of electric devices and wider application under the premise of realizing temperature display.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a liquid crystal temperature card is composed of two transparent film sheets and a plurality of polymer dispersed liquid crystal heat-sensitive light modulation film sheets which are arranged according to the size of a clearing point temperature value; the liquid crystal in the transparent film has different clearing point temperatures, the polymer dispersed liquid crystal thermosensitive light modulation film comprises liquid crystal, ultraviolet light curing polymer and spacers with the average refractive index similar to that of the liquid crystal, and the film is characterized in that: the liquid crystal is a long-pitch cholesteric liquid crystal, the pitch of the liquid crystal is more than 0.5 micrometer, and when the average refractive index of the liquid crystal is 1.6-1.64, the refractive index of the corresponding ultraviolet curing polymer is 1.6-1.64. The liquid crystal temperature card is a polymer dispersed liquid crystal thermosensitive light modulation film thick film card.
The liquid crystal is also doped with a color organic dye, and the addition amount of the color organic dye accounts for 0.1-0.5% of the weight of the liquid crystal; adjacent films have different light colors; the polymer dispersed liquid crystal thermosensitive light-adjusting film has different light color scattering fog-state appearances, the back surface is printed with deep color temperature value figures, and when the temperature of a clearing point is not reached, the temperature value figures printed on the film are not clear enough and are not easy to identify; each polymer dispersed liquid crystal heat-sensitive light modulation film has corresponding temperature of a clearing point, and different temperatures of the clearing points are distinguished by using different colors, so that the film is changed into a light color transparent state when reaching the corresponding temperature, namely, heat-sensitive light modulation, thereby clearly displaying the temperature value number which is difficult to identify originally.
The particle size of the spacer is 65-125 mu m, and the spacer is a plastic microsphere.
The weight percentage of the liquid crystal and the ultraviolet light curing prepolymer is 3.5-6.5: 6.5-3.5, wherein the weight of the spacer accounts for 0.1-0.5% of the total weight of the polymer dispersed liquid crystal.
The manufacturing method of the liquid crystal temperature card comprises the following steps:
1) preparing mixed liquid of a series of long-pitch cholesteric liquid crystals with different clearing point temperatures and an ultraviolet curing prepolymer, doping and adding colored organic dyes with different colors into different mixed liquid, enabling the refractive index of the ultraviolet curing prepolymer after curing to be close to the average refractive index of the liquid crystals, and adding a large-particle-size spacer into the mixed liquid;
2) coating the mixed solution between two transparent conductive films for film coating to prepare a series of composite films to be cured;
3) carrying out ultraviolet exposure phase separation and solidification to separate out liquid crystal into micro-droplets with the size below micron from the prepolymer, and polymerizing and solidifying the prepolymer to obtain a series of color heat-sensitive light adjusting films with different light colors and different clearing point temperatures;
4) cutting the thermosensitive light-adjusting film into small-sized sector, trapezoid or rectangular small pieces to form a polymer dispersed liquid crystal thermosensitive light-adjusting film;
5) arranging fan-shaped or trapezoid or rectangular small pieces of the polymer dispersed liquid crystal heat-sensitive dimming film sheets with different clearing point temperatures according to different clearing point temperatures (and different colors) in sequence to form a disc, a ring or a strip sheet, assembling the disc, the ring or the strip sheet into two transparent film sheets, and bonding the two transparent film sheets by using a sealant to form a heat-sensitive dimming thick film liquid crystal temperature card with multiple colors; wherein, dark color temperature value numbers are printed on one transparent film.
A water cup with a liquid crystal temperature card is provided with the liquid crystal temperature card, and the liquid crystal temperature card is composed of two transparent films and a plurality of polymer dispersed liquid crystal thermosensitive light modulation film films which are arranged in sequence.
The adjacent films have different light colors, and the films are arranged into a disc, a circular ring or a strip card according to the temperature value of the clearing points; the liquid crystal temperature card is assembled at the bottom of the cup or on the side wall of the cup, and the indicated water temperature in the cup can be seen from the outside of the cup.
The clearing point temperature of the liquid crystal in two adjacent polymer dispersed liquid crystal film sheets is different by 3 ℃ or 5 ℃. The temperature display interval of the liquid crystal temperature card is any interval of 30-100 ℃.
A method for manufacturing a water cup with a liquid crystal temperature card comprises an assembly mode of the liquid crystal temperature card on the water cup, and the specific mode is as follows:
1) a disc-shaped liquid crystal temperature card is adhered and assembled at the bottom in a transparent glass water cup (or a double-layer transparent glass heat preservation cup) by using an adhesive, and a glass sheet is covered on the liquid crystal temperature card for sealing, so that the temperature value indicated by the liquid crystal temperature card can be seen through the cup.
2) The annular liquid crystal temperature card is adhered and assembled on the outer side surface of the cylindrical transparent glass water cup or the outer side surface of the inner wall of the cylindrical vacuum layer of the double-layer transparent glass cup by using an adhesive, so that the temperature value indicated by the liquid crystal temperature card can be seen through the side surface of the cylindrical cup.
3) A disc-shaped liquid crystal temperature card is adhered and assembled on the bottom of a vacuum layer glass bin of a cover on a stainless steel vacuum cup by using an adhesive, and a window is formed outside the cover to enable a temperature value indicated by the liquid crystal temperature card in the glass bin to be visible through the window.
The utility model provides an application of thermos cup with liquid crystal temperature card, this liquid crystal temperature card itself just can be used as portable, non-electronic type, non-accurate temperature indicator card, and the equipment is inlayed on the thermos cup, can obtain the drinking cup product that has the temperature indication function of low-cost practicality.
The transparent film used by the polymer dispersed liquid crystal thermosensitive light modulation film is a transparent conductive film, and is favorable for firm bonding. The liquid crystal and the prepolymer only have optical parameter requirements but not electrical parameter requirements, do not need high-purity high-resistance raw materials, and can be cheap raw materials. The product of the invention does not need to be produced in a clean workshop.
The transparent films may be of the same or different materials and thicknesses, the small film sandwiching the polymer dispersed liquid crystal layer is preferably made of a transparent conductive film material such as PET of 0.1-0.2 mm, and the large film covering the upper and lower small pieces is preferably made of a PET or PC transparent film of 0.1-0.5 mm. The temperature scale value on the film is consistent with the clearing point temperature of the corresponding polymer dispersed liquid crystal film sheet.
Compared with the prior cholesteric liquid crystal thermochromatic effect body temperature card and the manufacturing technology thereof, the invention has the beneficial effects that:
the working principle of the existing cholesteric liquid crystal thermochromatic effect body temperature card is that cholesteric liquid crystal Bragg selects light reflection, different liquid crystal blocks have different light reflection temperature intervals, the back bottom is coated with black, temperature scale value black characters are printed on the surface, and when the liquid crystal does not reflect visible light, the temperature scale characters and the black back bottom are fused into a whole and cannot be seen; when the liquid crystal has visible light reflection, the liquid crystal blocks are colored to cover the black background so as to display black characters with the temperature scale value on the surface. The invention provides a body temperature card which is different from a cholesteric liquid crystal thermochromatic effect, namely a temperature card based on a Polymer Dispersed Liquid Crystal (PDLC) thermosensitive dimming principle, wherein thermosensitive dimming is the change between a scattering state and a transparent state along with the temperature. The thermosensitive dimming effect of the polymer dispersed liquid crystal film means that when the ambient temperature reaches the clearing point temperature of the polymer dispersed liquid crystal, the PDLC liquid crystal droplets are changed into isotropic transparent liquid from anisotropic turbid liquid, and the film becomes very transparent when the refractive index of the polymer is designed to be matched with the refractive index (which can be expressed by the average refractive index of the liquid crystal) of the liquid crystal clearing point. The existing polymer dispersed liquid crystal electric control light adjusting film is required to be as thin as possible under the condition that the voltage applied by the transparent conductive film is as low as possible, and the polymer dispersed liquid crystal layer is as thin as possible (such as 15-20 micrometers), so that the light shading capability of the PDLC film is not required to be strong, and objects are not visible at intervals of several centimeters away from the film, namely the requirements are met. The present invention requires that the PDLC be more opaque, and that objects be invisible a few millimeters apart from the film. In order to achieve the purpose of making the PDLC film have stronger shading capability, the thickness of the PDLC film layer is designed to be 65-125 micrometers, so that the PDLC film has stronger scattering capability. When the temperature is lower than the clearing point temperature of the PDLC film, the product is in a scattering fog state, and the temperature value number printed on the back surface is not easy to identify. When the temperature reaches the clearing point temperature of the PDLC, the product gradually becomes transparent and can clearly display the temperature value number which is difficult to identify originally. The appearance of the polymer dispersed liquid crystal heat-sensitive light-adjusting temperature card product can be colorless, white, single-color or multicolor and other designs. Different from PDLC electric control dimming film and liquid crystal writing board products, an ultra-clean workshop is not needed in the production environment in the manufacture of the liquid crystal temperature card (a transparent conductive film is adopted, and due to the existence of an inorganic layer, the ultraviolet curing adhesive is bonded more firmly, so that the bonding force between films can be improved).
The manufacturing method of the water cup with the liquid crystal temperature card is basically compatible with the manufacturing process of various existing vacuum heat-preservation cups, and does not need to be changed greatly. For example, in the existing transparent glass vacuum cup, only the disc-shaped liquid crystal temperature card needs to be pasted at the bottom inside the cup, and a piece of glass is covered for packaging, so that the indicated temperature can be seen through the outside of the side of the glass cup or can be seen from the top by opening the cup cover. Or the annular or strip-shaped liquid crystal temperature card is pasted on the outer side surface of the cylindrical inner wall of the double-layer glass cup, and the indicated temperature can be seen through the outer layer side glass. For the stainless steel vacuum cup, only the simple design of the cup cover is needed, a flat cylindrical glass bin and a window are formed, the cylindrical surface of the glass bin is sleeved by a hard rubber cylinder which is screwed and sealed by a common heat-resistant belt, the lower bottom of the glass bin is in contact with water vapor in the vacuum cup for heat transfer, a liquid crystal temperature card is tightly attached to the bottom of the glass bin, and the indicated temperature can be seen through the window on the glass bin on the stainless steel cup cover.
Compared with the first generation and the second generation of vacuum cups with passive non-electronic temperature indication functions, the water cup with the liquid crystal temperature card is a multilayer film thick film card (which can be in a disc shape, a circular ring shape or a strip shape), is easier to assemble on the water cup or the vacuum cup than a thin glass tube of a rod-shaped alcohol or mercury thermometer, and has a simpler structure than a thermosensitive elastic deformation pointer type thermometer.
Compared with a high-grade luxurious intelligent vacuum cup, the cup with the liquid crystal temperature card can be called as a heat-knowing cup. The touch screen without a battery circuit and the like has the advantages of simplicity, practicability, low manufacturing cost, low product selling price and the like. The cup or the vacuum cup with the liquid crystal temperature card and the temperature indicating function can be slightly modified into a cup or a vacuum cup with the liquid crystal temperature card and the temperature indicating function without special complex design and various stainless steel vacuum cups, glass vacuum cups, even baby bottles, student cups and the like. In addition, the temperature in the water cup in life does not need to be very accurate, and the fact that various intelligent cups give very accurate temperature values is not meaningful, so that the liquid crystal temperature card can indicate the approximate temperature of water in the water cup to be enough.
Compared with the patent of the inventor, namely a polymer dispersed liquid crystal thermosensitive dimming temperature card and a manufacturing method thereof (2019108078929), the temperature error indicated by the invention is larger due to the hysteresis effect of the polymer dispersed nematic liquid crystal film. The liquid crystal is long-pitch cholesteric liquid crystal, and the defect that the error of indicating temperature is too large can be overcome. The "hysteresis effect" refers to that the curve of the transmittance of the thermal dimming with the temperature rise and the curve with the temperature fall are not coincident and have great difference, and is similar to a "hysteresis loop" or can also be called as the "hysteresis effect" of the thermal dimming. The reason for the retardation effect is that the polymer interface molecules do not have strong enough effect on the nematic liquid crystal molecules, and the liquid crystal enters an isotropic state after exceeding the clearing point temperature, and then enters anisotropy after being cooled, so that the retardation is shown. The chiral agent is added in the doping process, so that nematic liquid crystal can be changed into cholesteric liquid crystal, and the chiral agent causes nematic liquid crystal molecules to enter a spiral anisotropic birefringence turbid state more quickly when the temperature is reduced. The long pitch means that the pitch is more than 0.5 micron, so that the Bragg reflection wavelength is more than 0.8 micron in the near infrared to the middle infrared (the cholesteric liquid crystal thermochromatic effect body temperature card is used for short pitch cholesteric liquid crystal). The addition amount of the chiral agent can adjust the error of the PDLC thermosensitive light-adjusting temperature. The invention also adds the color organic dye into the liquid crystal, so that the films with different clearing point temperatures have different colors, thereby not only being rich and beautiful in the color of the final product, but also being more beneficial to manual assembly operation in production and avoiding error card placement caused by misoperation. Meanwhile, the spacer with the extra-large particle size is used for replacing the spacer with the medium particle size in the temperature card, the particle size of the spacer is 65-125 mu m (products with the specification of Suzhou Nami company), even if the liquid crystal film layer is thicker, the covering effect of the spacer is improved, and the display precision is improved. In addition, the transparent film that polymer dispersion liquid crystal heat-sensitive membrane of adjusting luminance used in this application is transparent conductive film, can solve and discover when adopting prior art that the cohesive force of ordinary film ultraviolet curing adhesive is too poor and leads to the problem that can't carry out cutting process, improves its film and coheres firm intensity, is favorable to cutting into the yield of small piece, more does benefit to the manufacturing and can assemble on the less object of object (like the thermos cup).
Drawings
FIG. 1 is a schematic view of a cup with a liquid crystal temperature card according to the present invention, the liquid crystal temperature card being structurally mounted;
FIG. 2 is a schematic view of a cup with a liquid crystal temperature card according to the present invention, wherein the liquid crystal temperature card is in an operating state.
FIG. 3 is a schematic view of an embodiment of a transparent glass thermos cup with a liquid crystal temperature card assembled at the bottom of the cup.
FIG. 4 is a schematic view of an embodiment of a transparent glass thermos cup with a liquid crystal temperature card in the shape of a ring assembled on the side wall of the cylindrical cup according to the present invention.
FIG. 5 is a schematic view of an embodiment of a stainless steel vacuum cup with a liquid crystal temperature card assembled in a glass chamber of a cup cover.
In the figure, 1, a transparent thick film with temperature value figures printed on the back surface is assembled; 2. a transparent conductive film for polymer dispersed liquid crystal cell; 3. a cured polymer matrix; 4. liquid crystal droplets; 5. a spacer; 6. assembling a surface transparent thick film; 7. the temperature of the polymer dispersed liquid crystal film is lower than the scattering fog state of 50 ℃; 8. a transparent indicating state that the temperature of the polymer dispersed liquid crystal film is higher than 95 ℃; 9. the bottom of the double-layer glass thermos cup; 10. a disc-shaped liquid crystal temperature card; 11. the side wall of the double-layer glass heat-preservation cup; 12. a circular liquid crystal temperature card; 13. a stainless steel vacuum cup cover; 14. a glass bin with a liquid crystal temperature card; 15. a glass window.
Detailed Description
The present invention is further explained with reference to the following examples and drawings, but the scope of the present invention is not limited thereto.
Example 1
An embodiment of a double-layer glass heat-preservation cup bottom of a water cup with a liquid crystal temperature card is characterized in that the temperature card is formed by clamping a plurality of 0.125mm thick polymer dispersed liquid crystal layers by two 0.19mm thick PET transparent conductive films with two 0.5mm thick PC transparent thick films, and the polymer dispersed liquid crystal heat-sensitive light-adjusting film films arranged in sequence form a disc shape (the diameter of the disc is about 4cm, and the thickness of the disc is about 1.5 mm); the liquid crystals in the polymer dispersed liquid crystal heat-sensitive light modulation film films arranged in sequence have different clearing point temperatures, the films are arranged according to the clearing point temperature values and are connected end to end, and the films with different clearing point temperatures have different light color colors, as shown in fig. 1, the colors of adjacent polymer dispersed liquid crystal heat-sensitive light modulation film films are different, the colors of four polymer dispersed liquid crystal heat-sensitive light modulation film films are circularly and sequentially, and the difference between the clearing point temperatures of the liquid crystals in the adjacent two polymer dispersed liquid crystal heat-sensitive light modulation film films is 5 ℃. For example, the color of 40-55 ℃ is light pink, light yellow, light green and light blue, and the colors are arranged in sequence at 60-75 ℃.
The polymer dispersed liquid crystal film comprises liquid crystal, ultraviolet light cured polymer with the average refractive index similar to that of the liquid crystal and a small amount of doped spacers. A mixed liquid of a series of long-pitch cholesteric liquid crystals with different clearing points and different colors, an ultraviolet curing prepolymer and a small amount of gapping daughter plastic microspheres is prepared by adopting a conventional process, for example, a product of Nicoti Hua chemical technology Limited company for liquid crystal: low clearing point liquid crystal E7, clearing point temperature 60 ℃, refractive index No 1.52, Ne 1.747; the high clearing point liquid crystal FZX-01-1 has the clearing point temperature of 140 ℃, the refractive index No is 1.513, and the Ne is 1.72. It is known that the clearing point temperature of the polymer dispersed liquid crystal film produced by the production of the polymer dispersed liquid crystal film is reduced by about 30 ℃ from the clearing point temperature of the liquid crystal, and the clearing point temperature of the polymer dispersed liquid crystal film produced by blending the two types of liquid crystals at 5 ℃ by the two-bottle method is 40 ℃, 45 ℃, 50 ℃, …, to 12 types of liquid crystals at 95 ℃, and the average refractive index of the liquid crystals is about 1.62. The chiral agent is S811, and the addition amount is 9% of the liquid crystal weight percentage (or the chiral agent is S2011, the addition amount is 10% of the liquid crystal weight percentage, or the chiral agent is S1011, the addition amount is 3% of the liquid crystal weight percentage). Different color organic dyes are added into the long-pitch cholesteric liquid crystal with different clearing point temperatures, and the addition amount is 0.3 percent of the weight percentage of the liquid crystal. The ultraviolet curing prepolymer formula comprises the following main components in percentage by weight: photoinitiator 1173 (provided by Nanjing Wa mechanical chemical engineering Co., Ltd., N ═ 1.533) 1-3%, isobornyl acrylate (provided by Linyidet chemical Co., Ltd., N ═ 1.5) 7-9%, urethane acrylate (commercially available, N ═ 1.5) 5-10%, o-phenylphenoxyethyl acrylate OPPEA (commercially available, N ═ 1.57) 30-45%, bis-phenylphenoxyethyl acrylate BPEA (Taiwan chemical industry, N ═ 1.57) 30-45%, and the refractive index of the prepared prepolymer after curing is also matched with the average refractive index of liquid crystal by about 1.62. The liquid crystal and prepolymer were mixed in a ratio of 6 to 4 weight percent and in a ratio of about 0.1 weight percent (0.2 percent of the total weight of the liquid crystal and prepolymer) into spacer plastic microspheres (available from Suzhou Nami micro technology Co., Ltd.) having a particle size of 125 μm. The mixed liquid of various liquid crystal clearing point temperatures is respectively coated between two different transparent conductive films 2 (such as PET transparent conductive films) for polymer dispersed liquid crystal chips for film coating, and a series of composite films to be cured are manufactured.
Performing phase separation ultraviolet curing exposure (ultraviolet wavelength is 365nm, exposure intensity is 5 mW/cm)2And the exposure time is 2 minutes), so that liquid crystal is precipitated from the prepolymer into liquid crystal droplets 4 with the size of less than micron, and the prepolymer is polymerized and cured to form a cured polymer matrix 3, thereby obtaining a series of thermosensitive light-adjusting films with different light points, different temperatures and different light color colors.
And cutting the thermosensitive light-adjusting film into small sector pieces with small sizes, such as trapezoidal sector pieces with the height of 1cm, the lower bottom of 0.5cm and the upper bottom of 1cm, and palletizing and conveying to the next assembly process.
Arranging small pieces of trapezoidal fan surfaces of the thermosensitive light-adjusting film with different temperature of the clearing points in sequence according to the temperature of the different clearing points, assembling the small pieces into two PC transparent thick films 1 and 6 for combination (one of the films is printed with temperature value numbers), and sealing and bonding the two transparent thick films by using an ultraviolet curing adhesive (such as an ultraviolet curing adhesive K-6108 of a commercially available Zhuhai Jinshi energy science and technology Limited company) for bonding plastics to form a thermosensitive light-adjusting film card;
and finally, bonding the heat-sensitive light modulation film thick film card and a transparent glass disc (such as a transparent glass disc with the thickness of 1 mm) together by using an adhesive K-6108, wherein the glass surface faces upwards, the liquid crystal temperature card faces downwards (the printed temperature value figures face downwards), and the glass cement is welded to the bottom of the inner layer of the cup bottom 9 of the double-layer glass vacuum cup by adopting low-temperature hot melting of glass cement to manufacture a final product of the glass vacuum cup with the temperature indication function.
When no hot water exists in the vacuum cup in the initial state, each liquid crystal temperature card is in a light-colored scattering fog state, and when the temperature reaches the temperature of a PDLC (polymer dispersed liquid crystal) clearing point, the product is in a light-colored transparent state, so that the original difficultly-identified temperature value number can be clearly displayed, and the light-colored transparent display state is presented. Moreover, when the temperature of the clearing points is higher than the water temperature in the cup, the liquid crystal temperature cards are in a light color scattering fog state, such as a scattering fog state 7 in which the temperature of the polymer dispersed liquid crystal film is lower than 50 ℃ in fig. 2, and when the temperature of the clearing points is lower than or equal to the water temperature in the current cup, the liquid crystal temperature cards are in a light color transparent indicating temperature state, such as a transparent indicating state 8 in which the temperature of the polymer dispersed liquid crystal film is higher than 95 ℃ in fig. 2.
Example 2
An embodiment of a transparent glass thermos cup wall of a cup with a liquid crystal temperature card is characterized in that the temperature card is formed by clamping a plurality of polymer dispersed liquid crystal layers with the thickness of 0.125mm between two PET transparent films with the thickness of 0.12mm and a plurality of PET transparent conductive films with the thickness of 0.1mm, and polymer dispersed liquid crystal film sheets arranged in sequence form a ring shape (the diameter of the ring is about 5.5cm, the width is about 1cm, the circumference is about 18cm, and the thickness is about 0.6 mm); the liquid crystals in the polymer dispersed liquid crystal films arranged in sequence have different clearing point temperatures, the clearing point temperatures are different in color, and the clearing point temperatures are arranged according to the clearing point temperature values.
The processes of glue preparation, ultraviolet curing phase separation and the like are the same as the steps of the embodiment 1.
Cutting the heat-sensitive light-adjusting film into small rectangular pieces, such as 1cm × 1.5cm, and loading to next assembly process.
Arranging rectangular small pieces of the thermosensitive light-adjusting film with different temperature of the different clearing points and different colors according to the temperature sequence of the different clearing points, assembling the rectangular small pieces into two PET transparent thin films 1 and 6 for combination (one of the films is printed with temperature value numbers), and sealing and bonding the two transparent films by using an ultraviolet curing adhesive (such as an ultraviolet curing adhesive K-6108 of a commercially available Zhuhai Jinshi energy science and technology Limited company) for bonding plastics to form a thermosensitive light-adjusting film card;
finally, the heat-sensitive light modulation film card is bonded with the vacuum inner side wall of the double-layer cylindrical transparent water cup 11 by using an adhesive K-6108 to manufacture the final product of the transparent glass thermos cup with the temperature indication function.
Example 3
An embodiment of a stainless steel vacuum cup with a cup of a liquid crystal temperature card, the temperature card is formed by two PC transparent films with the thickness of 0.5mm and a plurality of polymer dispersed liquid crystal film sheets with the thickness of 0.125mm and arranged in sequence, wherein the two PET transparent conductive films with the thickness of 0.19mm and the interlayer of the polymer dispersed liquid crystal film sheets with the thickness of 0.125mm form a disc shape (the diameter of the disc is about 4cm, and the thickness of the disc is 1.5 mm); the liquid crystals in the plurality of sequentially arranged polymer dispersed liquid crystal film sheets have different clearing point temperatures and different colors, and are arranged according to the clearing point temperature values.
The polymer dispersed liquid crystal film comprises liquid crystal, ultraviolet light curing polymer with the average refractive index similar to that of the liquid crystal and a small amount of doped spacers. The clearing point temperatures of the liquid crystals in two adjacent sheets of the polymer dispersed liquid crystal film differed by 5 ℃.
The processes of glue preparation, ultraviolet curing phase separation and the like are the same as the steps of the embodiment 1.
And cutting the thermosensitive light-adjusting film into small sector-shaped pieces with small sizes, such as trapezoidal sector-shaped pieces with the height of 1cm, the lower bottom of 0.5cm and the upper bottom of 1cm, and palletizing and conveying to the next assembly process.
Arranging small pieces of trapezoidal fan surfaces of the thermosensitive light-adjusting film with different temperature of the clearing points in sequence according to the temperature of the different clearing points, assembling the small pieces into two PC transparent thick films 1 and 6 for combination (one of the films is printed with a temperature value number), and sealing and bonding the two transparent films by using an ultraviolet curing adhesive (such as an ultraviolet curing adhesive K-6108 of a product of the technologies Limited on the Jinshiji energy of the Pearl sea sold in the market) for bonding plastics to form a thick film card of the thermosensitive light-adjusting film;
finally, the heat-sensitive light modulation film card is bonded with the inner wall of the inner lower surface of the flat cylindrical transparent glass bin by an adhesive K-6108 to form a glass bin 14 with a liquid crystal temperature card, the glass bin is installed in a stainless steel heat preservation cup cover 13, a glass window 15 is exposed on the stainless steel heat preservation cup cover, and the stainless steel heat preservation cup final product with the temperature indication function is manufactured.
Nothing in this specification is said to apply to the prior art.
Claims (10)
1. A liquid crystal temperature card is composed of two transparent film sheets and a plurality of polymer dispersed liquid crystal heat-sensitive light modulation film sheets which are arranged according to the size of a clearing point temperature value; the liquid crystal in the transparent film has different clearing point temperatures, the polymer dispersed liquid crystal thermosensitive light modulation film comprises liquid crystal, ultraviolet light curing polymer and spacers with the average refractive index similar to that of the liquid crystal, and the film is characterized in that: the liquid crystal is a long-pitch cholesteric liquid crystal, the pitch of the liquid crystal is more than 0.5 micrometer, and when the average refractive index of the liquid crystal is 1.6-1.64, the refractive index of the corresponding ultraviolet curing polymer is 1.6-1.64.
2. The liquid crystal temperature card of claim 1, wherein the liquid crystal is further doped with a color organic dye, and the amount of the color organic dye added is 0.1-0.5% by weight of the liquid crystal; adjacent films have different light colors; the polymer dispersed liquid crystal thermosensitive light-adjusting film has different light-color scattering fog-state appearances, so that temperature value numbers printed on the film are not clear enough and are not easy to identify; each polymer dispersed liquid crystal heat-sensitive light modulation film has corresponding temperature of a clearing point, and becomes a light color transparent state when reaching the corresponding temperature, namely, heat-sensitive light modulation, thereby clearly displaying the temperature value number which is difficult to identify originally.
3. The liquid crystal temperature card of claim 1, wherein the spacer is a plastic microsphere having a particle size of 65-125 μm.
4. The liquid crystal temperature card according to claim 1, wherein the weight percentage of the liquid crystal and the uv-curable prepolymer is 3.5 to 6.5: 6.5 to 3.5.
5. The liquid crystal temperature card according to claim 1, wherein the uv-curable prepolymer formulation comprises the following main components in percentage by weight: 11731-3% of photoinitiator, 7-9% of isobornyl acrylate, 5-10% of polyurethane acrylate, 30-45% of o-phenylphenoxyethyl acrylate OPPEA and 30-45% of bis-phenylphenoxyethyl acrylate BPEA.
6. A method of manufacturing a liquid crystal temperature card according to claim 2, comprising the steps of:
1) preparing mixed liquid of a series of long-pitch cholesteric liquid crystals with different clearing point temperatures and an ultraviolet curing prepolymer, doping and adding colored organic dyes with different colors into different mixed liquid, enabling the refractive index of the ultraviolet curing prepolymer after curing to be close to the average refractive index of the liquid crystals, and adding a large-particle-size spacer into the mixed liquid;
2) coating the mixed solution between two transparent conductive films for film coating to prepare a series of composite films to be cured;
3) carrying out ultraviolet exposure phase separation and solidification to separate out liquid crystal into micro-droplets with the size below micron from the prepolymer, and polymerizing and solidifying the prepolymer to obtain a series of color heat-sensitive light adjusting films with different light colors and different clearing point temperatures;
4) cutting the thermosensitive light-adjusting film into small-sized sector, trapezoid or rectangular small pieces to form a polymer dispersed liquid crystal thermosensitive light-adjusting film;
5) arranging fan-shaped or trapezoid or rectangular small pieces of the polymer dispersed liquid crystal heat-sensitive dimming film sheets with different clearing point temperatures according to different clearing point temperatures (and different colors) in sequence to form a disc, a ring or a strip sheet, assembling the disc, the ring or the strip sheet into two transparent film sheets, and bonding the two transparent film sheets by using a sealant to form a heat-sensitive dimming thick film liquid crystal temperature card with multiple colors; wherein, dark color temperature value numbers are printed on one transparent film.
7. A water cup with a liquid crystal temperature card, characterized in that the water cup is equipped with the liquid crystal temperature card according to any one of claims 1 to 6, which is composed of two transparent films sandwiching a plurality of polymer dispersed liquid crystal thermo-sensitive light-adjusting film films arranged in sequence.
8. The cup with the liquid crystal temperature card of claim 7, wherein the adjacent films have different light colors, and the films are arranged into a disk, a ring or a strip card according to the temperature value of the clearing point; the liquid crystal temperature card is assembled at the bottom of the cup or on the side wall of the cup, and the indicated water temperature in the cup can be seen from the outside of the cup.
9. The water cup with the liquid crystal temperature card according to claim 7, wherein the difference between the clearing point temperatures of the liquid crystals in the two adjacent polymer dispersed liquid crystal films is 3 ℃ or 5 ℃, and the temperature indication interval of the liquid crystal temperature card is any interval of 30-100 ℃.
10. A method of manufacturing a cup according to claim 8, wherein the method comprises the following steps:
1) a disc-shaped liquid crystal temperature card is stuck and assembled at the bottom in a transparent glass water cup (or a double-layer glass vacuum cup) by using an adhesive, and the upper surface of the liquid crystal temperature card is covered and sealed by using a glass sheet, so that the temperature value indicated by the liquid crystal temperature card can be seen through the cup;
2) the annular or strip-shaped liquid crystal temperature card is adhered and assembled on the outer side surface of the cylindrical transparent glass water cup by using an adhesive, and if the double-layer glass vacuum cup is adopted, the annular or strip-shaped liquid crystal temperature card is adhered on the outer side surface of the inner wall of the vacuum interlayer, so that the temperature value indicated by the temperature card can be seen through the side surface of the cup;
3) a disc-shaped liquid crystal temperature card is adhered and assembled on the inner wall of a glass bin vacuum layer of a cover on a stainless steel vacuum cup by using an adhesive, and a window is opened outside the cover to enable the temperature value indicated by the temperature card to be visible through the window.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US12005408B1 (en) | 2023-04-14 | 2024-06-11 | Sharkninja Operating Llc | Mixing funnel |
| US12017192B1 (en) | 2023-06-16 | 2024-06-25 | Sharkninja Operating Llc | Carbonation mixing nozzles |
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