A water cup with a liquid crystal temperature card and a manufacturing method thereof

Abstract

The present invention is 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, which is composed of two transparent films sandwiching a plurality of polymer dispersed liquid crystal thermosensitive dimming film films arranged in sequence. The liquid crystal in the transparent film has different clearing point temperatures. The polymer dispersed liquid crystal thermosensitive dimming film film includes liquid crystal and ultraviolet light curing polymer and spacer with an average refractive index close to that of the liquid crystal. The liquid crystal is a long pitch cholesteric phase liquid crystal with a pitch of more than 0.5 microns. When the average refractive index is 1.6 to 1.64, the refractive index of the corresponding ultraviolet light curing polymer is also 1.6 to 1.64. Under the premise of realizing the display of temperature, the water cup has lower cost and does not require electrical devices, and will be more widely used.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing a water cup with a temperature display function, and particularly relates to a water cup with a liquid crystal temperature card with a passive non-electronic display and a manufacturing method thereof. Background Art

[0002] Thermos cups are very commonly used daily necessities for the people. Ordinary thermos cups, whether glass vacuum sandwich thermos cups or stainless steel vacuum sandwich thermos cups, do not have a temperature indication function, which makes it inconvenient to make tea or drink hot water during use. Technology changes life. In order to make thermos cups have a temperature display function, various smart cups have emerged. There are already many patented thermos cups with touch screen LCD displays on the market. However, since these products are active display devices (with battery circuit displays, etc.), they are technically complex, difficult to manufacture, very expensive, and require battery replacement, so the products are positioned as high-end consumer goods and high-end luxury gifts - "boss cups". Passive non-electronic thermos cup with temperature indication function (no battery circuit required), if the traditional alcohol thermometer or mercury thermometer loaded, embedded and assembled on the thermos cup can be called the first generation of passive non-electronic thermos cup with temperature indication function (which will appear clumsy), then the pointer thermometer with a thermistor (thermal elastic deformation) loaded, embedded and assembled on the thermos cup can be called the second generation of passive non-electronic thermos cup with temperature indication function. The present invention proposes a water cup with a liquid crystal temperature card and a manufacturing method thereof, which can be called the third generation of passive non-electronic water cup or thermos cup with temperature indication function, and is expected to be widely used in medium and low-end water cups or thermos cups. Summary of the invention

[0003] In order to achieve the goal of producing a new third-generation passive non-electronic thermos cup with temperature indication function, the present invention proposes a water cup with a liquid crystal temperature card and a manufacturing method thereof. The water cup has lower cost and no electrical components while realizing temperature display, and will be more widely used.

[0004] To achieve the above object, the technical solution of the present invention is:

[0005] A liquid crystal temperature card, which is composed of two transparent films sandwiching multiple polymer dispersed liquid crystal thermal dimming film films arranged in order of clearing point temperature values; the liquid crystal in the transparent film has different clearing point temperatures, and the polymer dispersed liquid crystal thermal dimming film film includes liquid crystal and ultraviolet light curing polymer and spacer with an average refractive index close to that of the liquid crystal, characterized in that: the liquid crystal is a long pitch cholesteric liquid crystal with a pitch of more than 0.5 microns, and when its average refractive index is 1.6-1.64, the refractive index of the corresponding ultraviolet light curing polymer is also 1.6-1.64. The liquid crystal temperature card is a polymer dispersed liquid crystal thermal dimming film thick film card.

[0006] The liquid crystal is doped with color organic dyes, and the amount of color organic dyes added is 0.1-0.5% of the weight percentage of the liquid crystal; adjacent films have different light colors; the polymer dispersed liquid crystal thermal dimming film film has different light color scattering fog appearances, and dark temperature value numbers are printed on the back. When the clearing point temperature is not reached, the temperature value numbers printed on it are not clear enough and difficult to identify; each piece of polymer dispersed liquid crystal thermal dimming film film has a corresponding clearing point temperature, and different clearing point temperatures also distinguish different colors. When the corresponding temperature is reached, it becomes a light color transparent state, that is, the so-called thermal dimming, thereby clearly displaying the temperature value numbers that were originally difficult to identify.

[0007] The particle size of the spacer is 65-125 μm, and the spacer is a plastic microsphere.

[0008] The weight percentage of liquid crystal and ultraviolet light curing prepolymer is 3.5-6.5:6.5-3.5, and the weight of the spacer accounts for 0.1-0.5% of the total weight of the polymer dispersed liquid crystal.

[0009] A method for manufacturing the above-mentioned liquid crystal temperature card comprises the following steps:

[0010] 1) A series of long pitch cholesteric liquid crystal and UV-curable prepolymer mixed solutions with different clearing point temperatures are prepared, and different colored organic dyes are doped into different mixed solutions. The refractive index of the UV-curable prepolymer after curing is close to the average refractive index of the liquid crystal, and large particle size spacers are added to the mixed solution;

[0011] 2) Apply the mixed liquid between two transparent conductive films for lamination to produce a series of composite films to be cured;

[0012] 3) UV exposure phase separation curing is performed to precipitate liquid crystal from the prepolymer into droplets of a size below micrometers, and the prepolymer is polymerized and cured to obtain a series of color thermosensitive dimming films with different clearing point temperatures and different light colors;

[0013] 4) Cutting the thermal-sensitive dimming film into small-sized fan-shaped, trapezoidal or rectangular pieces to form a polymer dispersed liquid crystal thermal-sensitive dimming film;

[0014] 5) Arrange the fan-shaped, trapezoidal or rectangular pieces of polymer dispersed liquid crystal thermal dimming film with different clearing point temperatures in order of different clearing point temperatures (and different colors) to form disks, rings or long strips, assemble them into two transparent films, and bond the two transparent films together with sealant to form a thermal dimming thick film liquid crystal temperature card with multiple colors; dark temperature value numbers are printed on one side of the transparent film.

[0015] A water cup with a liquid crystal temperature card is provided. The water cup is equipped with the above-mentioned liquid crystal temperature card. The liquid crystal temperature card is composed of two transparent films sandwiching a plurality of polymer dispersed liquid crystal thermosensitive dimming film films arranged in sequence.

[0016] Adjacent films have different light colors, and the films are arranged into disks, rings or long strips according to the temperature values ​​of the clearing points; the liquid crystal temperature card is mounted on the bottom or side wall of the water cup, and the water temperature in the water cup can be seen from the outside of the water cup.

[0017] The clearing point temperatures of the liquid crystals in two adjacent polymer dispersed liquid crystal films differ by 3° C. or 5° C. The temperature display interval of the liquid crystal temperature card is any interval of 30° C. to 100° C.

[0018] A method for manufacturing a water cup with a liquid crystal temperature card includes assembling the liquid crystal temperature card on the water cup, and the specific method is as follows:

[0019] 1) Use adhesive to stick the disc-shaped liquid crystal temperature card to the bottom of a transparent glass water cup (or a double-layer transparent glass thermos cup), and cover the liquid crystal temperature card with a glass sheet to seal it so that the temperature value indicated by the liquid crystal temperature card can be seen through the cup.

[0020] 2) Use adhesive to stick the annular liquid crystal temperature card on the outer side of a cylindrical transparent glass water cup, or on the outer side of the inner wall of the vacuum layer of a double-layer transparent glass cylindrical cup, so that the temperature value indicated by the liquid crystal temperature card can be seen through the side of the cylindrical cup.

[0021] 3) Use adhesive to stick the disc-shaped liquid crystal temperature card to the bottom of the vacuum layer glass chamber on the lid of the stainless steel thermos cup, and open a window on the outside of the lid so that the temperature value indicated by the liquid crystal temperature card in the glass chamber can be seen through the window.

[0022] The invention discloses an application of a thermos cup with a liquid crystal temperature card. The liquid crystal temperature card itself can be used as a portable, non-electronic, non-precise temperature indicator card. When assembled and embedded in the thermos cup, a low-cost, practical water cup product with a temperature indication function can be obtained.

[0023] The transparent film used in the polymer dispersed liquid crystal thermosensitive dimming film of the present invention is a transparent conductive film, which is conducive to strong bonding. There are only optical parameter requirements for liquid crystal and prepolymer, but no electrical parameter requirements, and high-purity and high-resistance raw materials are not required, and low-priced raw materials can be used. The product of the present invention does not need to be produced in a clean workshop.

[0024] The material and thickness of the above transparent films can be the same or different. The small film sandwiching the polymer dispersed liquid crystal layer is preferably made of transparent conductive film materials such as PET with a thickness of 0.1~0.2mm, and the large film covering the small pieces above and below is preferably made of PET or PC transparent film with a thickness of 0.1~0.5mm. The size of the temperature scale value on it is consistent with the clearing point temperature of the corresponding polymer dispersed liquid crystal film sheet.

[0025] Compared with the existing cholesteric liquid crystal thermochromic effect temperature card and its manufacturing technology, the beneficial effects of the present invention are:

[0026] The working principle of the existing cholesteric liquid crystal thermochromatic effect temperature card is that the cholesteric liquid crystal Bragg selective light reflection, different liquid crystal blocks have different light reflection temperature ranges, the back is painted black, the temperature scale value is printed on the surface in black, when the liquid crystal does not reflect visible light, the temperature scale font and the black back are integrated and invisible; when the liquid crystal has visible light reflection, the liquid crystal block is colored to cover the black back and then display the temperature scale value black font on the surface. The present invention proposes a temperature card that is different from the cholesteric liquid crystal thermochromatic effect - a temperature card based on the polymer dispersed liquid crystal (PDLC) thermosensitive dimming principle. The thermosensitive dimming is the change between the scattered state and the transparent state with temperature. The thermosensitive dimming effect of the polymer dispersed liquid crystal film refers to the change of the PDLC liquid crystal droplets from anisotropic turbid liquid to isotropic transparent liquid when the ambient temperature reaches the clearing point temperature of the polymer dispersed liquid crystal. The film becomes very transparent when the polymer refractive index is designed to match the refractive index of the liquid crystal clearing point (which can be expressed by the average refractive index of the liquid crystal). The existing polymer dispersed liquid crystal electrically controlled dimming film is subject to the requirement that the voltage applied by the transparent conductive film should be as low as possible, and the polymer dispersed liquid crystal layer is as thin as possible (such as 15-20 microns), so that the PDLC film does not need to have a strong light-shielding ability, and the object is invisible at a distance of several centimeters from the film. The present invention requires that the PDLC light-shielding ability is stronger, and the object is invisible at a distance of several millimeters from the film. In order to achieve the purpose of making the PDLC film have a stronger light-shielding ability, the thickness of the PDLC film layer of the present invention is designed to be 65-125 microns, so that the PDLC film has a stronger scattering ability. When the temperature is lower than the clearing point temperature of the PDLC film, the product presents a scattered mist state, and the temperature value printed on the back is not easy to identify. When the temperature reaches the clearing point temperature of the PDLC, the product gradually becomes transparent to clearly display the temperature value that was originally difficult to identify. Different from the black block appearance of the cholesteric phase liquid crystal thermochromic effect body temperature card, the appearance of the polymer dispersed liquid crystal thermal dimming temperature card product can be a variety of designs such as colorless, white, monochrome or multi-color. Different from PDLC electronically controlled dimming film and LCD writing board products, the production environment of LCD temperature card manufacturing does not require a clean room (transparent conductive film is used, and the presence of an inorganic layer makes the UV-curing adhesive bond more firmly, which can improve the bonding strength between films).

[0027] The invention discloses a water cup with a liquid crystal temperature card, and its manufacturing method is basically compatible with the existing manufacturing processes of various vacuum insulation cups, and no major changes are required. For example, for the existing transparent glass insulation cup, it is only necessary to stick the disc-shaped liquid crystal temperature card to the bottom of the water cup, and then cover it with a piece of glass for packaging. The indicated temperature can be seen through the outside of the glass cup, or can be seen from the top by opening the cup cover. Or a circular ring-shaped or long strip liquid crystal temperature card is pasted to the outer surface of the cylindrical inner wall of a double-layer glass cup, and the indicated temperature can be seen through the outer side glass. For a stainless steel insulation cup, it is only necessary to make a simple design on the cup cover, open a flat cylindrical glass chamber and a window, and then cover the glass chamber cylinder with a hard rubber tube with a commonly used heat-resistant heat-resistant screw to tighten the sealing screw buckle. The bottom of the glass chamber contacts and transfers heat with the water vapor in the insulation cup, and the liquid crystal temperature card is close to the bottom of the glass chamber. The indicated temperature can be seen through the upper window of the glass chamber on the stainless steel cup cover.

[0028] Compared with the first and second generation passive non-electronic thermos cups with temperature indicating function, the present invention provides a water cup with a liquid crystal temperature card, wherein the liquid crystal temperature card is a multi-layer film thick film card (which can be in the shape of a disc, a ring or a long strip), which is easier to assemble to a water cup or a thermos cup than the thin glass tube of a rod-shaped alcohol or mercury thermometer, and has a simpler structure than a thermosensitive elastic deformation pointer thermometer.

[0029] Compared with high-end and luxurious smart thermos cups, the water cup with a liquid crystal temperature card of the present invention can be called a "thermal cup". Without batteries, circuits, touch screens, etc., it naturally has the advantages of being simple and practical, low manufacturing cost, and low product price. There is no need for particularly complex designs. A variety of stainless steel thermos cups, glass thermos cups, even baby bottles, student water cups, etc. can be slightly modified into water cups or thermos cups with temperature indication functions with liquid crystal temperature cards. In addition, the temperature in the water cup in life does not need to be very accurate, and it is meaningless for various smart cups to give very accurate temperature values, so it is sufficient for the liquid crystal temperature card to indicate the approximate temperature of the water in the water cup.

[0030] Compared with the patent previously applied by the inventor - a polymer dispersed liquid crystal thermosensitive dimming temperature card and its manufacturing method (2019108078929), due to the hysteresis effect of the polymer dispersed nematic liquid crystal film, the invention still has a relatively large error in the indicated temperature. The liquid crystal described in the present invention is a long pitch cholesteric liquid crystal, which can overcome the deficiency of too large error in indicating temperature. The so-called "hysteresis effect" refers to the fact that the transmittance curve of this thermosensitive dimming does not coincide with the curve of temperature increase and temperature decrease, and there is a big difference, which is similar to the "hysteresis loop", or it can also be called the "hysteresis effect" of thermosensitive dimming. The reason for the hysteresis effect is that the effect of the polymer interface molecules on the nematic liquid crystal molecules is not strong enough. After the liquid crystal enters the isotropic state after exceeding the clearing point temperature, it appears to be delayed when the temperature is lowered and then enters the anisotropic state. Doping with a chiral agent can make the nematic liquid crystal become a cholesteric liquid crystal. When the temperature is lowered, the chiral agent causes the nematic liquid crystal molecules to enter the anisotropic birefringent turbid state of the spiral state faster. Long pitch means that the pitch is above 0.5 microns, so that the Bragg reflection wavelength is above 0.8 microns in the near infrared to the mid-infrared (cholesteric liquid crystal thermochromatic effect temperature card uses short pitch cholesteric liquid crystal). The amount of chiral agent added can adjust the temperature error of PDLC thermal dimming. The present invention also adds colored organic dyes to the liquid crystal so that the films with different clearing point temperatures have different colors. Not only is the final product rich in color and beautiful, but it is also more conducive to manual assembly operations in production to avoid misoperation and card placement errors. At the same time, the temperature card of this application uses extra-large particle size spacers instead of medium particle size spacers. The particle size of the spacer described in the present invention is 65-125μm (Suzhou Nanotech has this specification product). Even if the liquid crystal film layer is thicker, its covering effect is improved, which helps to improve the display accuracy. In addition, the transparent film used in the polymer dispersed liquid crystal thermal dimming film in the present application is a transparent conductive film, which can solve the problem that the bonding strength of the UV-curing adhesive of ordinary films is too poor to be cut when using the existing technology, thereby improving the bonding strength of the film, facilitating the yield of cutting into small pieces, and making it more conducive to manufacturing a film that can be assembled on smaller objects (such as thermos cups). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a water cup with a liquid crystal temperature card of the present invention, and a schematic diagram of the structure and installation of the liquid crystal temperature card;

[0032] Figure 2 The invention discloses a water cup with a liquid crystal temperature card, and a schematic diagram of the working state of the liquid crystal temperature card.

[0033] Figure 3 The present invention is a water cup with a liquid crystal temperature card, and a schematic diagram of an embodiment of a transparent glass thermos cup in which a disc-shaped liquid crystal temperature card is assembled at the bottom of the cup.

[0034] Figure 4The present invention is a water cup with a liquid crystal temperature card, and a schematic diagram of an embodiment of a transparent glass thermos cup in which the annular liquid crystal temperature card is assembled on the side wall of a cylindrical cup.

[0035] Figure 5 The present invention is a water cup with a liquid crystal temperature card, and a schematic diagram of an embodiment of a stainless steel thermos cup in which a disc-shaped liquid crystal temperature card is assembled in a glass compartment of a cup cover.

[0036] In the figure, 1. Transparent thick film with temperature value printed on the back for assembly; 2. Transparent conductive film for polymer dispersed liquid crystal chips; 3. Cured polymer matrix; 4. Liquid crystal droplets; 5. Spacers; 6. Surface transparent thick film for assembly; 7. Scattering mist state of polymer dispersed liquid crystal film with temperature below 50°C; 8. Transparent indicating state of polymer dispersed liquid crystal film with temperature above 95°C; 9. Bottom of double-layer glass thermos cup; 10. Disc-shaped liquid crystal temperature card; 11. Side wall of double-layer glass thermos cup; 12. Ring-shaped liquid crystal temperature card; 13. Stainless steel thermos cup lid; 14. Glass compartment with liquid crystal temperature card; 15. Glass window. DETAILED DESCRIPTION

[0037] The present invention is further explained below in conjunction with the embodiments and drawings, but this is not intended to limit the scope of protection of the present application.

[0038] Embodiment 1:

[0039] An embodiment of a double-layer glass insulation cup bottom of a water cup with a liquid crystal temperature card, the temperature card is composed of two 0.5mm thick PC transparent thick films sandwiched by multiple two 0.19mm thick PET transparent conductive films sandwiched by 0.125mm thick polymer dispersed liquid crystal layers, the polymer dispersed liquid crystal thermosensitive dimming film films arranged in sequence form a disc shape (the disc has a diameter of about 4cm and a thickness of about 1.5mm); the liquid crystals in the multiple polymer dispersed liquid crystal thermosensitive dimming film films arranged in sequence have different clearing point temperatures, are arranged according to the size of the clearing point temperature values, are connected end to end, and the films with different clearing point temperatures have different light colors, such as Figure 1 In the example, the colors of adjacent polymer dispersed liquid crystal thermosensitive dimming film films are different, and the colors of the four polymer dispersed liquid crystal thermosensitive dimming film films are cyclical, and the clearing point temperature of the liquid crystal in two adjacent polymer dispersed liquid crystal thermosensitive dimming film films differs by 5°C. For example, the colors of 40-55°C are light pink, light yellow, light green, and light blue, and 60-75°C are arranged in this color order.

[0040] The polymer dispersed liquid crystal film includes liquid crystal and ultraviolet light-cured polymer with an average refractive index close to that of the liquid crystal and a small amount of spacers. A conventional process is used to prepare a mixed liquid of a series of long-pitch cholesteric liquid crystals with different clearing points and colors, ultraviolet light-cured prepolymers, and a small amount of spacer plastic microspheres, such as the liquid crystal product of Yantai Xianhua Chemical Technology Co., Ltd.: low clearing point liquid crystal E7, clearing point temperature 60°C, refractive index No=1.52, Ne=1.747; high clearing point liquid crystal FZX-01-1, clearing point temperature 140°C, refractive index No=1.513, Ne=1.72. It is known that after the polymer dispersed liquid crystal film is made, the clearing point temperature of the film is about 30°C lower than the clearing point temperature of the liquid crystal. These two liquid crystals are mixed by a two-bottle method with a difference of 5°C to produce 12 kinds of liquid crystals with clearing point temperatures of 40°C, 45°C, 50°C, ..., to 95°C, and the average refractive index of the liquid crystal is about 1.62. The chiral agent is S811, and the added amount is 9% of the weight percentage of the liquid crystal (or the chiral agent is S2011, and the added amount is 10% of the weight percentage of the liquid crystal, or the chiral agent is S1011, and the added amount is 3% of the weight percentage of the liquid crystal). Different color organic dyes are added to the long pitch cholesteric phase liquid crystal with different clearing point temperatures, and the added amount is 0.3% of the weight percentage of the liquid crystal. The main components of the UV-curable prepolymer formula are as follows: 1-3% of photoinitiator 1173 (provided by Nanjing Wali Chemical Technology Co., Ltd., N=1.533), 7-9% of isobornyl acrylate (provided by Linyi Detuo Chemical Co., Ltd., N=1.5), 5-10% of polyurethane acrylate (commercially available, N=1.5), 30-45% of ortho-phenylphenoxyethyl acrylate OPPEA (commercially available, N=1.57), 30-45% of bis-phenylphenoxyethyl acrylate BPEA (N=1.57), and the refractive index of the prepolymer after curing matches the average refractive index of liquid crystal, which is also about 1.62. The liquid crystal and prepolymer are mixed in a weight ratio of 6 to 4, and are mixed with a large-particle size 125μm spacer plastic microsphere (provided by Suzhou Nanotech Co., Ltd.) at a weight percentage of about 0.1% (accounting for 0.2% of the total weight of the liquid crystal and the prepolymer). The mixed liquids with various liquid crystal clearing point temperatures are coated between two different polymer dispersed liquid crystal sheets using transparent conductive films 2 (such as PET transparent conductive films) to form a series of composite films to be cured.

[0041] Phase separation UV curing exposure (UV wavelength 365nm, exposure intensity 5mW / cm 2 , exposure time 2 minutes), so that the liquid crystal is precipitated from the prepolymer to become liquid crystal droplets 4 below the micron size, and the prepolymer is polymerized and cured to form a cured polymer matrix 3, thereby obtaining a series of thermosensitive dimming films with different clearing point temperatures and different light colors.

[0042] The thermal-sensitive dimming film is cut into small-sized fan-shaped pieces, such as a trapezoidal fan-shaped piece with a height of 1 cm, a lower base of 0.5 cm, and an upper base of 1 cm, and then loaded onto a tray and sent to the next assembly process.

[0043] Arrange the heat-sensitive dimming film trapezoidal fan-shaped pieces with different clearing point temperatures in the order of different clearing point temperatures, assemble them into two PC transparent thick films 1 and 6 for combination (one of the films has a temperature value printed on the outside), and seal and bond the two transparent thick films with a UV-curable adhesive for bonding plastics (such as the commercially available UV-curable adhesive K-6108 produced by Zhuhai Jinshi Technology Co., Ltd.) to form a heat-sensitive dimming film card;

[0044] Finally, the thermal dimming film thick film card and the transparent glass disc (such as a 1mm thick transparent glass disc) are glued together with the adhesive K-6108, with the glass side facing up and the liquid crystal temperature card facing down (the side with the printed temperature value facing down), and the glass glue is used to hot-melt "weld" to the inner bottom of the double-layer glass thermos cup bottom 9 to make the final product of the glass thermos cup with temperature indication function.

[0045] In the initial state, when there is no hot water in the thermos cup, each LCD temperature card presents a light color scattering fog state. When the temperature reaches the PDLC clearing point temperature, the product becomes a light color transparent state to clearly display the temperature value that was originally difficult to identify, presenting a light color transparent display state. Moreover, when the clearing point temperature is greater than the water temperature in the cup, the LCD temperature card presents a light color scattering fog state, such as Figure 2 The temperature of the polymer dispersed liquid crystal film is lower than 50℃ in the scattered mist state 7. When the temperature of the clearing point is less than or equal to the current water temperature in the cup, the liquid crystal temperature card will show a light color transparent indication temperature state, such as Figure 2 The transparent indication state of the polymer dispersed liquid crystal film is 8 when the temperature is higher than 95°C.

[0046] Embodiment 2:

[0047] An embodiment of a transparent glass thermos cup wall of a water cup with a liquid crystal temperature card, the temperature card is composed of two 0.1mm thin PET transparent films sandwiched by multiple two 0.12mm thick PET transparent conductive films sandwiched by a 0.125mm thick polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal film sheets arranged in sequence form a ring shape (the ring has a diameter of about 5.5cm, a width of about 1cm, a circumference of about 18cm, and a thickness of about 0.6mm); the liquid crystals in the multiple polymer dispersed liquid crystal films arranged in sequence have different clearing point temperatures, different clearing point temperatures have different colors, and are arranged according to the size of the clearing point temperature values.

[0048] The process of preparing glue and UV curing phase separation is the same as that of Example 1.

[0049] The thermal-sensitive dimming film is cut into small-sized rectangular pieces, such as 1 cm×1.5 cm, and then loaded onto a tray and sent to the next assembly process.

[0050] Arrange rectangular pieces of thermal-sensitive dimming film with different colors and different clearing point temperatures in the order of different clearing point temperatures, assemble them into two PET transparent thin films 1 and 6 for combination (one of the films is printed with a temperature value), and seal and bond the two transparent films together with a UV-curable adhesive for bonding plastics (such as the commercially available UV-curable adhesive K-6108 produced by Zhuhai Jinshi Technology Co., Ltd.) to form a thermal-sensitive dimming film card;

[0051] Finally, the thermosensitive dimming film card and the vacuum inner wall of the double-layer cylindrical transparent water cup 11 are bonded together with adhesive K-6108 to make a transparent glass thermos cup with temperature indication function.

[0052] Embodiment 3:

[0053] An embodiment of a stainless steel thermos cup with a liquid crystal temperature card, the temperature card is formed by two 0.5mm thick PC transparent films sandwiched by multiple pieces of two 0.19mm thick PET transparent conductive films arranged in sequence and a 0.125mm thick polymer dispersed liquid crystal film sheet to form a disc shape (the disc has a diameter of about 4cm and a thickness of 1.5mm); the liquid crystals in the multiple pieces of polymer dispersed liquid crystal film sheets arranged in sequence have different clearing point temperatures and different colors, and are arranged according to the size of the clearing point temperature values.

[0054] The polymer dispersed liquid crystal film includes liquid crystal and ultraviolet light curing polymer with an average refractive index close to that of the liquid crystal and doped with a small amount of spacers. The clearing point temperature of the liquid crystal in two adjacent polymer dispersed liquid crystal film sheets differs by 5°C.

[0055] The process of preparing glue and UV curing phase separation is the same as that of Example 1.

[0056] The thermal-sensitive dimming film is cut into small-sized fan-shaped pieces, such as a trapezoidal fan-shaped piece with a height of 1 cm, a lower base of 0.5 cm, and an upper base of 1 cm, and then loaded onto a tray and sent to the next assembly process.

[0057] Arrange the thermal-sensitive dimming film trapezoidal fan-shaped pieces with different clearing point temperatures in the order of different clearing point temperatures, assemble them into two PC transparent thick films 1 and 6 for combination (one of the films is printed with a temperature value number), and seal and bond the two transparent films together with a UV-curable adhesive for bonding plastics (such as the commercially available UV-curable adhesive K-6108 produced by Zhuhai Jinshi Technology Co., Ltd.) to form a thermal-sensitive dimming film thick film card;

[0058] Finally, the thermal dimming film card is bonded to the inner wall of the lower surface of the flat cylindrical transparent glass chamber with adhesive K-6108 to form a glass chamber 14 with a liquid crystal temperature card, which is installed in the stainless steel thermos cup cover 13. The glass window 15 is exposed on the stainless steel thermos cup cover to make the final stainless steel thermos cup with temperature indication function.

[0059] Any matters not described in the present invention are applicable to the prior art.

Claims

1. A liquid crystal temperature card, which is composed of two transparent films sandwiching a plurality of polymer dispersed liquid crystal thermosensitive dimming film films arranged in order of clearing point temperature values; the liquid crystals in the transparent films have different clearing point temperatures, and the polymer dispersed liquid crystal thermosensitive dimming film films include liquid crystals and ultraviolet light curing polymers with an average refractive index close to that of the liquid crystals and spacers, characterized in that: The liquid crystal is a long pitch cholesteric liquid crystal, the pitch of which is greater than 0.5 micrometers, and when the average refractive index is 1.6-1.64, the refractive index of the corresponding UV-curable polymer is also 1.6-1.64; Different colored organic dyes were added to long pitch cholesteric liquid crystals with different clearing point temperatures, and the added amount was 0.3% of the weight percentage of the liquid crystal; Liquid crystal: low clearing point liquid crystal E7, clearing point temperature 60℃, refractive index No=1.52, Ne=1.747; high clearing point liquid crystal FZX-01-1, clearing point temperature 140℃, refractive index No=1.513, Ne=1.72; different clearing point temperatures can be obtained by equal mixing using the two-bottle method; The chiral agent is S811, and the added amount is 9% of the weight percentage of the liquid crystal; or the chiral agent is S2011, and the added amount is 10% of the weight percentage of the liquid crystal; or the chiral agent is S1011, and the added amount is 3% of the weight percentage of the liquid crystal; The main components of the UV-curable prepolymer formula are as follows by weight: photoinitiator 11731-3%, isobornyl acrylate 7-9%, polyurethane acrylate 5-10%, o-phenylphenoxyethyl acrylate OPPEA 30-45%, bis-phenylphenoxyethyl acrylate BPEA 30-45%; Liquid crystal and prepolymer are mixed in a weight percentage of 6 to 4, and are mixed with spacer plastic microspheres with a large particle size of 125 μm at a weight percentage of 0.1%; The mixed liquids of various liquid crystal clearing point temperatures are respectively coated between two different polymer dispersed liquid crystal sheets and laminated with transparent conductive films to produce a series of composite films to be cured. Phase separation UV curing exposure was performed, and the exposure process was: UV wavelength 365nm, exposure intensity 5mW / cm 2 , exposure time 2 minutes; the liquid crystal is precipitated from the prepolymer to become liquid crystal droplets below the micron size, the prepolymer is polymerized and solidified to form a solidified polymer matrix, and a series of thermal-sensitive dimming films with different clearing point temperatures and different light colors are obtained.

2. A method for manufacturing the liquid crystal temperature card according to claim 1, comprising the following steps: 1) A series of long pitch cholesteric liquid crystal and UV-curable prepolymer mixed solutions with different clearing point temperatures are prepared, and different colored organic dyes are doped into different mixed solutions. The refractive index of the UV-curable prepolymer after curing is close to the average refractive index of the liquid crystal, and large particle size spacers are added to the mixed solution; 2) Apply the mixed liquid between two transparent conductive films for lamination to produce a series of composite films to be cured; 3) UV exposure phase separation curing is performed to precipitate liquid crystal from the prepolymer into droplets of a size below micrometers, and the prepolymer is polymerized and cured to obtain a series of color thermosensitive dimming films with different clearing point temperatures and different light colors; 4) Cutting the thermal-sensitive dimming film into small-sized fan-shaped, trapezoidal or rectangular pieces to form a polymer dispersed liquid crystal thermal-sensitive dimming film film; 5) Arrange the fan-shaped, trapezoidal or rectangular pieces of polymer dispersed liquid crystal thermal dimming film with different clearing point temperatures in different colors in different clearing point temperatures to form disks, rings or long strips, assemble them into two transparent films, and bond the two transparent films together with sealant to form a thermal dimming thick film liquid crystal temperature card with multiple colors; dark temperature value numbers are printed on one side of the transparent film.

3. A water cup with a liquid crystal temperature card, characterized in that: The water cup is equipped with the liquid crystal temperature card described in any one of claim 1, and the liquid crystal temperature card is composed of two transparent films sandwiching a plurality of polymer dispersed liquid crystal thermosensitive dimming film films arranged in sequence.

4. The water cup with a liquid crystal temperature card according to claim 3, characterized in that: Adjacent films have different light colors, and the films are arranged into disks, rings or long strips according to the temperature values ​​of the clearing points; the liquid crystal temperature card is mounted on the bottom or side wall of the water cup, and the water temperature in the water cup can be seen from the outside of the water cup.

5. The water cup with a liquid crystal temperature card as claimed in claim 3, characterized in that: The clearing point temperatures of the liquid crystals in two adjacent polymer dispersed liquid crystal films differ by 3° C. or 5° C., and the temperature indication interval of the liquid crystal temperature card is any interval of 30° C. to 100° C.

6. A method for manufacturing a water cup according to claim 5, characterized in that: The method includes the assembly of the liquid crystal temperature card on the water cup: 1) Use adhesive to stick the disc-shaped liquid crystal temperature card to the bottom of a transparent glass water cup or a double-layer glass thermos cup, and then cover and seal the liquid crystal temperature card with a glass sheet so that the temperature value indicated by the liquid crystal temperature card can be seen through the cup; 2) Use adhesive to stick the circular or long liquid crystal temperature card on the outer surface of the cylindrical transparent glass water cup. If it is a double-layer glass thermos cup, stick it on the outer 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 of the cup; 3) Use adhesive to stick the disc-shaped liquid crystal temperature card to the inner wall of the glass chamber vacuum layer of the lid of the stainless steel thermos cup, and open a window on the outside of the lid so that the temperature value indicated by the temperature card can be seen through the window.

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