Temperature sensing type color developing assembly

Abstract

In order to solve the problems that an existing temperature-sensitive color developing layer containing a temperature-sensitive color developing material is low in color-changing sensitivity and slow in temperature response, the temperature-sensitive color developing assembly comprises a transparent film layer, a color-changing hydrogel layer and a non-transparent film layer, the color-changing hydrogel layer is arranged between the transparent film layer and the non-transparent film layer, and the color-changing hydrogel layer is arranged between the transparent film layer and the non-transparent film layer. The color-changing hydrogel layer comprises a first color-changing hydrogel area, a second color-changing hydrogel area and an nth color-changing hydrogel area, n is greater than 2, the color developing temperature of the first color-changing hydrogel area is T1, the color developing temperature of the second color-changing hydrogel area is T2, the color developing temperature of the nth color-changing hydrogel area is Tn, and T1 < T2 < Tn. According to the temperature sensing type color developing assembly, the temperature response rate is increased, the length of the color developing strip is gradually increased along with the gradual increase of the temperature, the response rate is high, the color is clear, and the sensitivity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of color-changing films, in particular to a temperature-sensitive color-developing component. Background Art

[0002] With the improvement of living standards, people have put forward higher and higher requirements for the user experience and appearance aesthetics of consumer electronic products. For example, the surface of existing consumer electronic products is provided with a color-changing film, which is obtained by multi-layer composite, including a thermosensitive color-developing layer, and the thermosensitive color-developing layer contains a thermosensitive color-developing layer. The color change of the thermosensitive color-developing layer is achieved by adding a thermosensitive color-developing material therein; the existing commercialized thermosensitive color-developing materials are mainly based on the temperature-induced energy level change of inorganic oxides in inks or the temperature-sensitive isomerization of organic molecules to achieve their color change. Although adding thermosensitive color-developing materials to the thermosensitive color-developing layer can achieve color changes at different temperatures, the thermosensitive color-developing materials in the thermosensitive color-developing layer are of a single type and a single color-developing structure; and with the extension of the use time, the stability and reliability of the thermosensitive color-developing materials are significantly reduced, and the thermosensitive color-developing layer has problems such as low color change sensitivity, slow temperature response, and dull color. Utility Model Content

[0003] The utility model aims to solve the problems of low color change sensitivity and slow temperature response of the existing temperature-sensitive color-developing layer containing temperature-sensitive color-developing materials, and provides a temperature-sensitive color-developing component.

[0004] The utility model provides a temperature-sensitive color development component, comprising a transparent film layer, a color-changing hydrogel layer and a non-transparent film layer, wherein the color-changing hydrogel layer is arranged between the transparent film layer and the non-transparent film layer, and the color-changing hydrogel layer comprises a first color-changing hydrogel region, a second color-changing hydrogel region and an nth color-changing hydrogel region, wherein n>2, and the color development temperature of the first color-changing hydrogel region is T 1 , the color development temperature of the second color-changing hydrogel region is T 2 The color development temperature of the nth color-changing hydrogel region is T n , T 1 <T 2 <T n .

[0005] Preferably, the transparent film layer comprises a first transparent region, a second transparent region and an mth transparent region, m>2;

[0006] The side of the first transparent region facing the color-changing hydrogel layer is connected to the first color-changing hydrogel region, the side of the second transparent region facing the color-changing hydrogel layer is connected to the second color-changing hydrogel region, and the side of the mth transparent region facing the color-changing hydrogel layer is connected to the nth color-changing hydrogel region.

[0007] Preferably, the color-changing hydrogel layer contains a temperature-sensitive color-developing material.

[0008] Preferably, when the external temperature does not reach the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer is a colorless and transparent layer, and the light transmittance of the colorless and transparent layer is greater than 80%.

[0009] Preferably, when the external temperature reaches the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer is a white opaque layer, and the light transmittance of the white opaque layer is less than 5%.

[0010] Preferably, the material of the transparent film layer includes at least one of polyurethane, polycarbonate, silicone, PET, and organic glass.

[0011] Preferably, the material of the non-transparent film layer is one of polyethylene, PP, PVC, PMMA, PC, and PET.

[0012] Preferably, the thickness of the transparent film layer is 0.1 mm to 2 mm.

[0013] Preferably, the thickness of the non-transparent film layer is 0.1 mm to 5 mm.

[0014] Preferably, the thickness of the color-changing hydrogel layer is 0.3 mm to 2 mm.

[0015] Preferably, the visible light transmittance of the transparent film layer is 50-100%.

[0016] The temperature-sensitive color-developing component provided in the present application displays the color of the color-changing hydrogel layer and the color of the transparent film layer as a whole when the color-changing hydrogel layer reaches the color-changing temperature. The color-changing hydrogel layer includes a first color-changing hydrogel region, a second color-changing hydrogel region and an nth color-changing hydrogel region. At the same time, T is limited. 1 <T 2 <T n , when reaching T 1 It can change color when the temperature is set, and the temperature response rate is improved. As the temperature gradually increases, the length of the color display strip gradually increases. By adjusting the different color changing temperatures of the color-changing hydrogel layer, different colors can be displayed in real time. Not only is the response rate fast, but also the color diversity and saturation are improved. The colors displayed at different temperature changes are clear and bright, with clear colors and high sensitivity, which solves the problems of low color change sensitivity and slow temperature response of the existing temperature-sensitive color-developing layer containing temperature-sensitive color-developing materials.

[0017] The temperature-sensitive color display component provided in the present application displays different colors according to different temperatures, and is convenient for monitoring the temperature range. It is easy to assemble, has strong designability, a wide range of application scenarios, and an intuitive consumer experience. It can be used for the appearance of products that require various temperature color displays. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a temperature-sensitive color rendering component provided by an embodiment of the present utility model;

[0019] Figure 2 It is a schematic diagram of a temperature-sensitive color rendering component structure provided by another embodiment of the utility model;

[0020] 1. Transparent film layer; 1-1. First transparent region; 1-2. Second transparent region 1-2; 1-3. Third transparent region; 2. Color-changing hydrogel layer; 2-1. First color-changing hydrogel region; 2-2. Second color-changing hydrogel region; 2-3. Third color-changing hydrogel region; 3. Non-transparent film layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In order to illustrate the technical solution of the present utility model, specific embodiments are provided below for illustration.

[0023] like Figure 1 As shown, an embodiment of the utility model provides a temperature-sensitive color development component, including a transparent film layer 1, a color-changing hydrogel layer 2 and a non-transparent film layer 3, wherein the color-changing hydrogel layer 2 is arranged between the transparent film layer 1 and the non-transparent film layer 3, and the color-changing hydrogel layer 2 includes a first color-changing hydrogel region 2-1, a second color-changing hydrogel region 2-2 and an nth color-changing hydrogel region, n>2, and the color development temperature of the first color-changing hydrogel region 2-1 is T 1 The color development temperature of the second color-changing hydrogel region 2-2 is T 2 The color development temperature of the nth color-changing hydrogel region is T n , T 1 <T 2 <T n .

[0024] Specifically, the color-changing hydrogel layer 2 is arranged between the non-transparent film layer 3 and the transparent film layer 1. When the temperature is lower than the color-changing temperature of the color-changing hydrogel layer 2, the transparent film layer 1 is light-transmissive and the color-changing hydrogel layer 2 is also light-transmissive. At this time, the temperature-sensitive color-developing component displays the color of the non-transparent film layer 3; when the temperature reaches the color-changing hydrogel layer 2, the color-changing hydrogel layer 2 changes color, and light cannot pass through the color-changing hydrogel layer 2. At this time, the color displayed by the temperature-sensitive color-developing component is the color of the color-changing hydrogel layer 2 plus the color of the transparent film layer 1.

[0025] It should be noted that, for the nth color-changing hydrogel region, n>2, such as when n is 3, the color-changing hydrogel layer 2 includes the first color-changing hydrogel region 2-1, the second color-changing hydrogel region 2-2 and the third color-changing hydrogel region 2-3; such as when n is 4, the color-changing hydrogel layer 2 includes the first color-changing hydrogel region 2-1, the second color-changing hydrogel region 2-2, the third color-changing hydrogel region 2-3 and the fourth color-changing hydrogel region.

[0026] Limited T 1 <T 2 <T n , which is to define the color change temperature of different regions of the color change hydrogel layer 2. For example, when the temperature reaches T 1 When the temperature reaches T, the first color-changing hydrogel region 2-1 changes color, and light cannot pass through the first color-changing hydrogel region 2-1. At this time, the temperature-sensitive color-developing component shows the color of the first color-changing hydrogel region 2-1 and the color of the transparent film layer 1 on the side of the first color-changing hydrogel layer 2 away from the non-transparent film layer 3. Similarly, when the temperature reaches T 2 When the second color-changing hydrogel region 2-2 changes color, light cannot penetrate the second color-changing hydrogel region 2-2, and the temperature-sensitive color-developing component now shows the color of the first color-changing hydrogel region 2-1 and the color of the transparent film layer 1 on the side of the first color-changing hydrogel region 2-1 away from the non-transparent film layer 3, the color of the second color-changing hydrogel region 2-2 and the color of the transparent film layer 1 on the side of the second color-changing hydrogel region 2-2 away from the non-transparent film layer 3. By changing the color of the transparent film layer 1 on the side of the first color-changing hydrogel region 2-1 away from the non-transparent film layer 3, changing the color of the transparent film layer 1 on the side of the second color-changing hydrogel region 2-2 away from the non-transparent film layer 3, and changing the color of the transparent film layer 1 on the side of the nth color-changing hydrogel region away from the non-transparent film layer 3, a temperature-sensitive color-developing component showing different colors at different temperatures can be obtained.

[0027] The temperature-sensitive color-developing component provided in the present application, when the color-changing temperature of the color-changing hydrogel layer 2 is reached, displays the color of the color-changing hydrogel layer 2 and the color of the transparent film layer 1 as a whole. The color-changing hydrogel layer 2 includes a first color-changing hydrogel region 2-1, a second color-changing hydrogel region 2-2 and an nth color-changing hydrogel region. At the same time, T is limited. 1 <T 2 <T n , when reaching T 1The color changes when the temperature rises. As the temperature gradually increases, the length of the color strip gradually increases. By adjusting the different color change temperatures of the color-changing hydrogel layer 2, different colors are displayed in real time. Not only is the response rate fast, but also the color diversity and saturation are improved. The colors displayed at different temperature changes are clear and bright, with clear colors and high sensitivity. The temperature-sensitive color display component displays different colors according to different temperatures, and is convenient for monitoring the temperature range. It is easy to assemble and has strong designability. The temperature-sensitive color display has a wide range of application scenarios, and the consumer experience is intuitive. It can be used for the appearance of products that require temperature color display.

[0028] In one embodiment, the color-changing hydrogel layer 2 contains a temperature-sensitive color-developing material.

[0029] Specifically, the color-changing hydrogel layer 2 contains a temperature-sensitive color-developing material. When the color-developing temperature of the temperature-sensitive color-developing material is reached, the color-changing hydrogel layer 2 changes color. At this time, the temperature-sensitive color-developing component displays the color of the color-changing hydrogel layer 2 and the color of the transparent film layer 1.

[0030] The color-changing hydrogel layer 2 is a prior art gel formed by copolymerization of N-isopropylacrylamide and N-vinylpyrrolidone with nano clay as a crosslinking agent. The gel is added with different color-changing pigments, and the color-changing temperature range is different; for example, the color-changing temperature range is 25 to 50°C. Specifically, the color-changing temperature can be in the following ranges: 25°C to 30°C, 30°C to 40°C, and 40°C to 50°C.

[0031] In one embodiment, when the external temperature does not reach the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer 2 is a colorless and transparent layer, and the light transmittance of the colorless and transparent layer is greater than 80%.

[0032] Specifically, the color-changing hydrogel layer 2 contains a thermosensitive color-developing material. When the external temperature does not reach the color-changing temperature of the thermosensitive color-developing material, the color-changing hydrogel layer 2 is a colorless and transparent layer. At this time, the color-changing hydrogel layer 2 is basically light-transmitting, with a transmittance of >80%. The transparent film layer 1 is also light-transmitting. At this time, the temperature-sensitive color-developing component displays the color of the non-transparent film layer 3.

[0033] In one embodiment, when the external temperature reaches the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer 2 is a white opaque layer, and the light transmittance of the white opaque layer is less than 5%.

[0034] Specifically, the color-changing hydrogel layer 2 contains a temperature-sensitive color-developing material. When the external temperature reaches the color-changing temperature of the temperature-sensitive color-developing material, the color-changing hydrogel layer 2 is a white opaque layer, and the light transmittance of the white opaque layer is less than 5%. At this time, the color-changing hydrogel layer 2 prevents light from passing through the color-changing hydrogel layer 2. At this time, the temperature-sensitive color-developing component displays the color of the transparent film layer 1 and the white color of the color-changing hydrogel layer 2. For example, when the color of the transparent film layer 1 is blue, when the external temperature reaches the color-changing temperature of the temperature-sensitive color-developing material, the temperature-sensitive color-developing component displays bright blue, and bright blue is the overall color of white and blue.

[0035] The temperature-sensitive color-developing component provided in the present application does not use a single thermosensitive color-developing material as the thermosensitive color-developing layer, but encapsulates different color materials on the upper and lower parts of the hydrogel, thereby protecting the thermosensitive color-developing material and improving the stability of the thermosensitive color-developing material; at the same time, when the color-changing temperature is reached, the color-changing hydrogel layer 2 is changed into a white opaque layer, preventing light from passing through the color-changing hydrogel layer 2, thereby showing the color of the transparent film layer 1, and dividing the color-changing hydrogel layer 2 into color-changing hydrogel areas at different temperatures, thereby improving the color-changing sensitivity and temperature response rate.

[0036] In one embodiment, the material of the transparent film layer 1 includes at least one of polyurethane, polycarbonate, silicone, PET, and organic glass.

[0037] The color of the material of the transparent film layer 1 can be at least one of red, orange, yellow, green, cyan, blue and purple.

[0038] In one embodiment, the visible light transmittance of the transparent film layer 1 is 50-100%.

[0039] Specifically, the visible light transmittance of the transparent film layer 1 is in the range of 50-100%. When the color change temperature of the color-changing hydrogel layer 2 is not reached, visible light can pass through the transparent film layer 1, so that the temperature-sensitive color development component displays the color of the non-transparent film layer 3.

[0040] In one embodiment, the non-transparent film layer 3 is made of one of polyethylene, PP, PVC, PMMA, PC, and PET.

[0041] Specifically, it is understood that the color of the non-transparent film layer 3 can also be other colors, and the color of the transparent film layer 1 is required to be different from the color of the non-transparent film layer 3. The color of the non-transparent film layer 3 is preferably black.

[0042] In one embodiment, the thickness of the transparent film layer 1 is 0.1 mm to 2 mm.

[0043] Specifically, the thickness of the transparent film layer 1 can be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, etc. The thickness of the transparent film layer 1 can be selected according to different usage requirements.

[0044] In one embodiment, the thickness of the non-transparent film layer 3 is 0.1 mm to 5 mm.

[0045] Specifically, the thickness of the non-transparent film layer 3 can be 0.1 mm, 0.5 mm, 0.9 mm, 2.2 mm, 2.4 mm, 2.8 mm, 3.0 mm, 3.4 mm, 3.8 mm, 4.0 mm, 4.3 mm, 4.7 mm, 5.0 mm, etc. The thickness of the non-transparent film layer 3 can be selected according to different usage requirements.

[0046] In one embodiment, the color-changing hydrogel layer 2 has a thickness of 0.3-2 mm.

[0047] Specifically, the thickness of the color-changing hydrogel layer 2 can be 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, etc. The thickness of the color-changing hydrogel layer 2 can be selected according to different usage requirements.

[0048] The present application provides another embodiment, in which the temperature-sensitive color-developing component has the same structure as that of the first embodiment, except that the structure of the transparent film layer 1 is different, as described below.

[0049] In another embodiment, the transparent film layer 1 includes a first transparent region 1-1, a second transparent region 1-2 and an mth transparent region, m>2;

[0050] The first transparent region 1-1 is connected to the first color-changing hydrogel region 2-1 on the side facing the color-changing hydrogel layer 2, the second transparent region 1-2 is connected to the second color-changing hydrogel region 2-2 on the side facing the color-changing hydrogel layer 2, and the mth transparent region is connected to the nth color-changing hydrogel region on the side facing the color-changing hydrogel layer 2.

[0051] Specifically, Figure 2As shown, the first transparent region 1-1 is connected to the first color-changing hydrogel region 2-1, the second transparent region 1-2 is connected to the second color-changing hydrogel region 2-2, and the mth transparent region is connected to the nth color-changing hydrogel region. m is an integer greater than 2, and n is also an integer greater than 2. For example, when m is 3, the transparent film layer 1 includes the first transparent region 1-1, the second transparent region 1-2, and the third transparent region 1-3. When m is 4, the transparent film layer 1 includes the first transparent region 1-1, the second transparent region 1-2, the third transparent region 1-3, and the fourth transparent region.

[0052] Specifically, when the external temperature reaches T 1 When the external temperature reaches T , the first color-changing hydrogel region 2-1 changes color and becomes a white opaque layer. At this time, the temperature-sensitive color-developing component displays the color of the first transparent region 1-1, and the rest of the area displays the color of the non-transparent film layer 3. 2 When the external temperature reaches T , the second color-changing hydrogel area 2-2 changes color and becomes a white opaque layer. At this time, the temperature-sensitive color-developing component displays the colors of the first transparent area 1-1 and the second transparent area 1-2, and the rest of the area displays the color of the non-transparent film layer 3. n When the nth color-changing hydrogel area changes color and becomes a white opaque layer, the temperature-sensitive color-developing component now displays the colors of the first transparent area 1-1, the second transparent area 1-2, and the mth transparent area.

[0053] The first transparent area 1-1, the second transparent area 1-2, and the mth transparent area are set with different colors. As the temperature continues to rise, the temperature-sensitive color display component displays different colors, which can monitor the temperature. At the same time, the temperature range can be judged based on the different colors displayed. The temperature display color display has a wide range of application scenarios, and the consumer experience is intuitive. It can be used for the appearance of various products that require temperature color display.

[0054] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the utility model, and should be included in the protection scope of the utility model.

Claims

1. A temperature-sensitive color rendering component, characterized in that: The invention comprises a transparent film layer, a color-changing hydrogel layer and a non-transparent film layer, wherein the color-changing hydrogel layer is arranged between the transparent film layer and the non-transparent film layer, the color-changing hydrogel layer comprises a first color-changing hydrogel region, a second color-changing hydrogel region and an nth color-changing hydrogel region, n>2, the color-developing temperature of the first color-changing hydrogel region is T1, the color-developing temperature of the second color-changing hydrogel region is T2, the color-developing temperature of the nth color-changing hydrogel region is T n , T1<T2<T n .

2. The temperature-sensitive color developing component according to claim 1, characterized in that: The transparent film layer comprises a first transparent region, a second transparent region and an mth transparent region, where m>2; The side of the first transparent region facing the color-changing hydrogel layer is connected to the first color-changing hydrogel region, the side of the second transparent region facing the color-changing hydrogel layer is connected to the second color-changing hydrogel region, and the side of the mth transparent region facing the color-changing hydrogel layer is connected to the nth color-changing hydrogel region.

3. The temperature-sensitive color developing component according to claim 1, characterized in that: The color-changing hydrogel layer contains a temperature-sensitive color-developing material.

4. The temperature-sensitive color developing component according to claim 3, characterized in that: When the external temperature does not reach the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer is a colorless and transparent layer, and the light transmittance of the colorless and transparent layer is greater than 80%.

5. The temperature-sensitive color developing component according to claim 3, characterized in that: When the external temperature reaches the phase change temperature of the thermosensitive color-developing material, the color-changing hydrogel layer is a white opaque layer, and the light transmittance of the white opaque layer is less than 5%.

6. The temperature-sensitive color developing component according to claim 1, characterized in that: The thickness of the transparent film layer is 0.1-2 mm.

7. The temperature-sensitive color developing component according to claim 1, characterized in that: The thickness of the non-transparent film layer is 0.1-5 mm.

8. The temperature-sensitive color developing component according to claim 1, characterized in that: The thickness of the color-changing hydrogel layer is 0.3-2 mm.

9. The temperature-sensitive color developing component according to claim 1, characterized in that: The visible light transmittance of the transparent film layer is 50-100%.

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