Fixed gate prepared by silk-screen printing of graphene carbon paste on PET and preparation method of fixed gate

Abstract

The invention discloses a fixed gate prepared by silk-screen printing of graphene carbon paste on PET and a preparation method thereof, the fixed gate comprises the graphene carbon paste, a PET plate layer and an adhesive sticker layer, the graphene carbon paste is located at the top of the PET plate layer, the PET plate layer is located at the top of the adhesive sticker layer, the graphene carbon paste, the PET plate layer and the adhesive sticker layer are in bonding connection, and the adhesive sticker layer is located at the top of the PET plate layer. The graphene carbon paste is printed on the PET plate layer in a silk-screen mode, the graphene carbon paste is cured on the PET material through baking, a traditional epoxy resin copper-clad plate process and an indium oxide process of ITO glass are abandoned, the manufacturing steps are simplified, and therefore compared with the copper-clad plate process and the indium oxide process, the manufacturing method is more simplified, and the manufacturing cost is reduced. And compared with the yield of the traditional epoxy resin copper-clad plate and ITO glass, the yield of the method disclosed by the invention is higher.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, in particular to a fixed grid made by screen-printing graphene carbon paste on PET and a preparation method thereof. Background Art

[0002] Based on the fixed grid, an important accessory for the production of electronic digital calipers in the domestic measuring tool industry, there are generally two main production methods used in the market: one is the fixed grid produced by epoxy resin copper clad laminate, which is more commonly used by domestic companies; the second is the ITO glass fixed grid.

[0003] The fixed grid produced by epoxy resin copper clad laminate is made of epoxy resin as the base material, and copper clad laminate is directly produced on one side. It is formed by hot pressing and uses copper plate as the main body of electronic signal transmission. It has strong signal, good processing technology and is easy to install on supporting products. However, the epoxy resin material itself is easily affected by temperature and humidity environment, which often affects the accuracy and stability of electronic digital calipers. The copper clad laminate needs to be corroded to make a fixed grid, which is not environmentally friendly.

[0004] The ITO glass fixed grid process is to add a sputtered indium oxide conductive film coating on the glass. However, glass is fragile and has high processability requirements, so the high scrap rate leads to high manufacturing costs. The thickness of the chrome plating layer will also affect the strength of the electronic signal and thus affect the accuracy and stability of the caliper measurement. Summary of the invention

[0005] The object of the present invention is to provide a fixed grid made by screen-printing graphene carbon paste on PET and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fixed grid made by screen-printing graphene carbon paste on PET, comprising graphene carbon paste, a PET board layer and a self-adhesive layer, wherein the graphene carbon paste is located on the top of the PET board layer, the PET board layer is located on the top of the self-adhesive layer, and the graphene carbon paste, the PET board layer and the self-adhesive layer are bonded together.

[0007] Preferably, the graphene carbon slurry layer is formed by mixing epoxy resin, ethylene glycol, polydimethylsiloxane, graphene and carbon black.

[0008] A method for preparing a fixed grid comprises the following steps:

[0009] (1) Screen printing graphene carbon paste on the PET board layer and baking it at 50°C-80°C for 30-35min;

[0010] (2) After the graphene carbon slurry is solidified, the adhesive layer is attached to the other side of the PET board layer to form a fixed grid.

[0011] Preferably, the graphene carbon slurry layer has a thickness of 0.02-0.05 mm.

[0012] Preferably, the model of the graphene carbon slurry is JELCON CH-8.

[0013] Preferably, the graphene carbon paste is printed on the PET plate by screen printing technology, and the mesh used for screen printing is a 350-mesh screen.

[0014] Preferably, the graphene carbon slurry has a curing temperature of 50°C-80°C and a curing time of 30-35 minutes.

[0015] Preferably, the self-adhesive layer is an acrylic adhesive.

[0016] Preferably, the PET board layer is made of polyethylene terephthalate, and the PET board layer has good mechanical properties, excellent chemical resistance, good dimensional stability and low water absorption, good electrical insulation properties, excellent barrier properties, good transparency and gloss, and environmental protection.

[0017] A method for preparing a fixed grid made by screen printing graphene carbon paste on PET, comprising the following steps:

[0018] Step 1: Screen print the graphene carbon paste on the PET board. The thickness of the graphene carbon paste layer is 0.02-0.05mm, and it is baked at 50℃-80℃ for 30-35min. The mesh used for screen printing of graphene carbon paste is 350 mesh, and the model of graphene carbon paste is JELCON CH-8;

[0019] Step 2: After the graphene carbon slurry layer is solidified, the adhesive layer is pasted on the other side of the PET sheet to make a fixed grid;

[0020] The graphene carbon paste is screen-printed onto PET and then cured on the PET material after baking. The traditional epoxy resin copper clad laminate process and the indium oxide process of ITO glass are abandoned. The production steps are simplified, the product accuracy and stability are improved, and the production cost is reduced, the process is simplified, and the pollution is reduced.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. When the present invention is used, the graphene carbon paste is screen-printed onto the PET board layer, and the graphene carbon paste is cured on the PET material after baking, thereby abandoning the traditional epoxy resin copper clad laminate process and the indium oxide process of ITO glass, simplifying the production steps, so the present invention is more simplified compared with the copper clad laminate and indium oxide process, and the output of the present invention is higher than that of the traditional epoxy resin copper clad laminate and ITO glass.

[0023] 2. The present invention sets a PET board layer, which has good mechanical properties, excellent chemical resistance, good dimensional stability and low water absorption, good electrical insulation performance, excellent barrier performance, good transparency and glossiness, and environmental protection. The conductive part in the fixed grid is completed by solidified graphene carbon slurry, which has certain heat resistance, wear resistance, strong adhesion, and can resist the influence of temperature and humidity factors. Thereby ensuring the accuracy and stability of the product, the installation process is more convenient, and the advantages of reducing production costs, simplifying the process, and reducing pollution are achieved.

[0024] 3. The present invention provides a self-adhesive layer, and the self-adhesive layer has good adhesion and peeling properties, good weather resistance, high transparency and good environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the explosion structure of the present invention.

[0026] In the figure: graphene carbon paste 1, PET board layer 2, and self-adhesive layer 3. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1

[0029] Embodiment 1

[0030] Preparation steps of fixed grid based on JELCON CH-8 graphene carbon slurry:

[0031] Materials preparation:

[0032] The graphene carbon paste model JELCON CH-8 was selected, which has excellent conductive properties and is suitable for fixed grid preparation.

[0033] Prepare PET sheets with good mechanical properties, chemical resistance, dimensional stability, electrical insulation properties, barrier properties, transparency and gloss, as well as environmental protection.

[0034] Prepare a self-adhesive layer to protect the graphene carbon paste layer and facilitate installation.

[0035] Graphene carbon paste screen printing:

[0036] The graphene carbon paste was evenly printed on the PET sheet using a 350-mesh screen to form a graphene carbon paste layer with a thickness of 0.02-0.05 mm.

[0037] Screen printing has the advantages of simple operation, low cost and high printing precision, and is suitable for mass production.

[0038] Baking and curing:

[0039] Place the printed PET sheet in an oven at 50℃-80℃ and bake for 30-35 minutes to fully solidify the graphene carbon slurry layer and improve its adhesion and conductivity.

[0040] The baked and solidified graphene carbon slurry layer has excellent temperature resistance, wear resistance and adhesion, and can resist the influence of temperature and humidity factors, ensuring the accuracy and stability of the fixed grid.

[0041] Paste the adhesive layer:

[0042] Stick the adhesive layer on the other side of the PET sheet to form a protective layer and facilitate the installation and use of the fixed grille.

[0043] The self-adhesive layer has good adhesive properties and weather resistance, and can effectively protect the graphene carbon slurry layer from scratches and pollution, thereby extending the service life of the fixed grid.

[0044] advantage:

[0045] Compared with the epoxy copper clad plate fixed grid, this embodiment simplifies the production steps and reduces the production cost, and the PET material is more environmentally friendly and not easily affected by environmental factors.

[0046] Compared with the ITO glass fixed grid, this embodiment avoids the problem of glass fragility, and the graphene carbon slurry layer has better conductivity and weather resistance, thereby improving the accuracy and stability of the fixed grid.

[0047] Specific implementation process: The fixed grid is made of graphene carbon paste screen-printed on a PET sheet. The graphene carbon paste layer, as the conductive part, has excellent conductivity, temperature resistance, wear resistance and adhesion, and can resist the influence of temperature and humidity factors to ensure the accuracy and stability of the fixed grid. The PET sheet has good mechanical properties, chemical resistance, dimensional stability, electrical insulation properties, barrier properties, transparency and gloss, as well as environmental protection. As the base material of the fixed grid, it can provide stable support and protection. The present invention simplifies the production steps, reduces production costs, increases output, and the production process is more environmentally friendly, the installation process is convenient, and has good application prospects.

[0048] A method for preparing a fixed grid made by screen printing graphene carbon paste on PET, comprising the following steps:

[0049] Step 1: Screen print the graphene carbon paste on the PET board. The thickness of the graphene carbon paste layer is 0.02-0.05mm, and it is baked at 50℃-80℃ for 30-35min. The mesh used for screen printing of graphene carbon paste is 350 mesh, and the model of graphene carbon paste is JELCON CH-8;

[0050] Step 2: After the graphene carbon slurry layer is solidified, the adhesive layer is pasted on the other side of the PET sheet to make a fixed grid;

[0051] The graphene carbon paste is screen-printed onto PET and then cured on the PET material after baking. The traditional epoxy resin copper clad laminate process and the indium oxide process of ITO glass are abandoned. The production steps are simplified, the product accuracy and stability are improved, and the production cost is reduced, the process is simplified, and the pollution is reduced.

[0052] Embodiment 2

[0053] Based on Example 1: Preparation steps of fixed grid based on different types of graphene carbon paste:

[0054] Material selection:

[0055] Choose other types of graphene carbon paste, such as JELCON CH-10 or JELCON CH-12, which have different conductive properties and adhesion properties.

[0056] Other types of graphene carbon paste may have higher conductivity or better adhesion properties and can be selected according to specific application requirements.

[0057] Graphene carbon paste screen printing:

[0058] Using the same screen printing process as in Example 1, different types of graphene carbon pastes were printed on the PET sheet to form a graphene carbon paste layer.

[0059] By adjusting the model of graphene carbon paste, the conductivity and adhesion properties of the fixed grid can be changed to meet the needs of different application scenarios.

[0060] Baking and curing, pasting the adhesive layer:

[0061] The steps are the same as those in Example 1, wherein the graphene carbon slurry layer is baked and cured, and a self-adhesive layer is pasted.

[0062] advantage:

[0063] In this embodiment, by selecting different types of graphene carbon paste, the conductive property and adhesion property of the fixed grid can be flexibly adjusted to meet the needs of different application scenarios.

[0064] Compared with Example 1, this example provides more options and can be customized according to specific needs;

[0065] Embodiment 3

[0066] Based on Example 1: Preparation steps of fixed grid based on graphene carbon slurry layers with different thicknesses:

[0067] Graphene carbon paste screen printing:

[0068] The same screen printing process as in Example 1 was used to print graphene carbon paste on the PET sheet to form graphene carbon paste layers of different thicknesses, such as 0.01 mm, 0.03 mm, and 0.05 mm.

[0069] Graphene carbon paste layers of different thicknesses have different resistance values, which can change the measurement accuracy and resolution of the fixed grid.

[0070] Baking and curing, pasting the adhesive layer:

[0071] The steps are the same as those in Example 1, wherein the graphene carbon slurry layer is baked and cured, and a self-adhesive layer is pasted.

[0072] advantage:

[0073] In this embodiment, by adjusting the thickness of the graphene carbon slurry layer, the resistance value of the fixed grid can be changed, thereby changing its measurement accuracy and resolution to meet the requirements of different measurement ranges and accuracies.

[0074] Compared with Example 1, this example provides more options and can be customized according to specific needs;

[0075] Example 4

[0076] The preparation steps of fixed grid based on different types of PET sheets:

[0077] Material selection:

[0078] Choose different types of PET sheets, such as transparent PET and black PET, which have different optical and mechanical properties.

[0079] Different types of PET sheets can meet the needs of different application scenarios. For example, transparent PET sheets are suitable for application scenarios where fixed grid patterns need to be observed, while black PET sheets have better light-shielding properties.

[0080] Graphene carbon paste screen printing, baking and curing, and pasting of self-adhesive layer:

[0081] The steps are the same as those in Example 1, wherein the graphene carbon paste is screen-printed on the PET plate, and then baked and cured, and finally a self-adhesive layer is pasted.

[0082] advantage:

[0083] In this embodiment, by selecting different types of PET sheets, the optical and mechanical properties of the fixed grid can be changed to meet the needs of different application scenarios.

[0084] Compared with Example 1, this example provides more options and can be customized according to specific needs;

[0085] Example 5

[0086] Preparation steps based on different shapes of fixed grid:

[0087] Design the fixed grid pattern:

[0088] According to the specific application scenario, fixed grid patterns of different shapes are designed, such as straight line, curve, and grid.

[0089] Fixed gratings of different shapes can meet the requirements of different measurement ranges and accuracies.

[0090] Graphene carbon paste screen printing, baking and curing, and pasting of self-adhesive layer:

[0091] The steps are the same as those in Example 1, wherein the graphene carbon paste is screen-printed on the PET plate, and then baked and cured, and finally a self-adhesive layer is pasted.

[0092] advantage:

[0093] This embodiment can meet the requirements of different measurement ranges and accuracies by designing fixed grating patterns of different shapes.

[0094] Compared with Example 1, this example provides more options and can be customized according to specific needs.

[0095] The present invention provides a fixed grid made by screen-printing graphene carbon paste on PET and a preparation method thereof, aiming to solve the problems of high cost, complex process and environmental pollution in the existing fixed grid preparation method. The fixed grid uses a PET sheet as a substrate and has excellent mechanical properties, chemical resistance, dimensional stability, electrical insulation performance, barrier performance, transparency and gloss, as well as environmental protection. The graphene carbon paste layer serves as a conductive part and has excellent electrical conductivity, temperature resistance, wear resistance and adhesion, and can resist the influence of temperature and humidity factors, thereby ensuring the accuracy and stability of the fixed grid. The present invention simplifies the production steps, reduces the production cost, and increases the output. The production process is more environmentally friendly, the installation process is convenient, and the invention has good application prospects.

[0096] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed grid made by screen printing graphene carbon paste on PET, comprising graphene carbon paste (1), a PET plate layer (2) and a self-adhesive layer (3), characterized in that: The graphene carbon paste (1) is located on the top of the PET board layer (2), the PET board layer (2) is located on the top of the self-adhesive layer (3), and the graphene carbon paste (1), the PET board layer (2) and the self-adhesive layer (3) are bonded to each other.

2. The fixed grid made by screen printing graphene carbon paste on PET according to claim 1, characterized in that: The graphene carbon slurry (1) layer is formed by mixing epoxy resin, ethylene glycol, polydimethylsiloxane, graphene and carbon black.

3. A method for preparing a fixed grid according to any one of claims 1 to 2, characterized in that: The following steps are involved: (1) screen printing graphene carbon paste on the PET board layer (2), and baking it at 50°C-80°C for 30-35 minutes; (2) After the graphene carbon slurry (1) is solidified, the self-adhesive layer (3) is attached to the other side of the PET board layer (2) to form a fixed grid.

4. The fixed grid made by screen printing graphene carbon paste on PET according to claim 3, characterized in that: The thickness of the graphene carbon slurry (1) layer is 0.02-0.05 mm.

5. The fixed grid made by screen printing graphene carbon paste on PET according to claim 3, characterized in that: The model of graphene carbon slurry (1) is JELCON CH-8.

6. The fixed grid made by screen printing graphene carbon paste on PET according to claim 3, characterized in that: The graphene carbon paste (1) is printed on the PET plate by screen printing technology, and the mesh used for the screen printing is a 350-mesh screen.

7. The fixed grid made by screen printing graphene carbon paste on PET according to claim 3, characterized in that: The curing temperature of the graphene carbon slurry (1) is 50° C.-80° C., and the curing time is 30-35 minutes.

8. The fixed grid made by screen printing graphene carbon paste on PET according to claim 1, characterized in that: The self-adhesive layer (3) is an acrylic adhesive.

9. The fixed grid made by screen printing graphene carbon paste on PET according to claim 1, characterized in that: The PET board layer (2) is made of polyethylene terephthalate. The PET board layer (2) has good mechanical properties, excellent chemical resistance, good dimensional stability and low water absorption, good electrical insulation properties, excellent barrier properties, good transparency and gloss, and environmental protection.

10. The method for preparing a fixed grid made by screen printing graphene carbon paste on PET according to claim 1, characterized in that: The following steps are involved: Step 1: Screen print the graphene carbon paste on the PET board. The thickness of the graphene carbon paste layer is 0.02-0.05mm, and it is baked at 50℃-80℃ for 30-35min. The mesh used for screen printing of graphene carbon paste is 350 mesh, and the model of graphene carbon paste is JELCON CH-8; Step 2: After the graphene carbon slurry layer is solidified, the adhesive layer is pasted on the other side of the PET sheet to make a fixed grid; The graphene carbon paste is screen-printed onto PET and then cured on the PET material after baking. The traditional epoxy resin copper clad laminate process and the indium oxide process of ITO glass are abandoned. The production steps are simplified, the product accuracy and stability are improved, and the production cost is reduced, the process is simplified, and the pollution is reduced.

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