A substrate for air-jet direct writing printing and a preparation method and application thereof

Abstract

This invention belongs to the field of ink direct-write printing technology, specifically relating to a substrate for pneumatic ink direct-write printing, its preparation method, and its application. Compared to existing technologies that shorten the process edge length of pneumatic ink direct-write printing by adjusting the pressure applied to the ink by the printing equipment, this invention addresses the issue from the substrate perspective, providing a substrate that can still effectively shorten the process edge length of pneumatic ink direct-write printing even under high-speed printing conditions. Moreover, since this invention does not involve modifying the pneumatic ink direct-write printing equipment, through adaptive adjustments, the substrate of this invention can be applied to the vast majority of pneumatic ink direct-write printing equipment, demonstrating its high application value. It provides a novel solution for reducing the printing cost of existing pneumatic ink direct-write printing equipment and improving the process edge of printed products.

Description

Technical Field

[0001] This application belongs to the field of ink direct writing printing technology, specifically relating to a substrate for pneumatic ink direct writing printing and its preparation method. Background Technology

[0002] Direct Ink Writing (DIW) is an emerging high-precision additive 3D printing technology that uses a controllable nozzle system to precisely spray viscous ink onto a target surface, which is then cured through methods such as thermosetting or cross-linking to form a three-dimensional structure. Based on its inherent advantages, Direct Ink Writing has demonstrated significant application potential in recent years in fields such as biomedical engineering, microdevice manufacturing, aerospace and defense, and the display industry. Specifically, ink-to-text printing offers the following advantages: High precision and resolution, enabling the construction of complex geometries, microstructures, and tiny structures. It is widely used to manufacture complex structures and nanoscale materials, resulting in higher quality materials. High-speed printing meets the current application demands of the printing market. Compared to traditional inkjet and laser printing, ink-to-text printing uses ink more economically and efficiently, resulting in lower equipment operating costs. It can print with different types of inks, including colored inks, fluorescent inks, and metallic inks, thus offering a wide range of applications. It provides high application flexibility; by using different types of inks and substrates, the performance characteristics of the final product can be adjusted, such as hardness, elasticity, and conductivity. Furthermore, compared to existing printing technologies, ink-to-text printing operates very quietly without noise interference.

[0003] In ink-to-write printing, ink ejection methods mainly include pneumatic, mechanical, and electromagnetic. Pneumatic ink ejection refers to applying air pressure to force ink into a nozzle or syringe, and then controlling the ejection speed and flow by adjusting the air pressure and nozzle position. Mechanical ink ejection uses mechanical devices to control ink ejection and flow; a common mechanical ink ejection device is a screw extrusion structure. Electromagnetic ink ejection uses electromagnetic force to push ink into a nozzle or syringe; this method typically uses electromagnetic drives or solenoid valves to control the ejection speed and flow. Considering factors such as wear and energy consumption for mechanical and electromagnetic ink ejection methods, the most common and widely used ink-to-write printing devices currently on the market employ the pneumatic ejection method. However, the pneumatic ejection method also has some drawbacks in the ink-to-write printing process.

[0004] Specifically, during pneumatic direct-write printing, the print head's movement speed undergoes acceleration, constant speed, and deceleration. Because the ink supply pressure remains constant, the thickness of the printed lines on the substrate varies. Specifically, the lines formed during acceleration and deceleration are thicker than those formed during constant speed, resulting in an overall product with lines of varying thickness. To ensure uniformity in the printed product's shape, currently only the printed lines from the constant speed phase are cut; the remaining cut portions are referred to as the process edge.

[0005] To minimize the length of the process edge, improve substrate utilization, and reduce printing costs, a common solution is the rapid on / off air supply method, which controls the air supply pressure to be turned on only during the constant-speed printing phase. However, due to the hysteresis effect of the pneumatic system, pneumatic direct-write printers cannot guarantee precise matching of ink flow and movement speed during high-speed printing. Therefore, this method still cannot effectively solve the technical problem of excessively long process edges on the product. Summary of the Invention

[0006] The purpose of this application is to provide a substrate that can effectively shorten the edge length of the pneumatic ink direct writing printing process, as well as its preparation method and application, which is achieved through the following technical solution:

[0007] A substrate for pneumatic direct-write printing includes:

[0008] The reserved area is used for printing lines by a pneumatic direct-write printing device; the process edge area is used for finishing the edges of the printed lines, and the process edge area includes at least two defining strips that intersect the printed lines, with an ink retention area between adjacent defining strips; the defining strips and the printing ink have a mutual repulsive force.

[0009] Compared to existing technologies that shorten the edge length of pneumatic ink direct-write printing by adjusting the ink pressure applied by the printing equipment, this application takes a different approach, focusing on the substrate itself. It provides a substrate that can effectively shorten the edge length of pneumatic ink direct-write printing even at high-speed printing speeds. Furthermore, since this application does not involve modifying the pneumatic ink direct-write printing equipment, the substrate can be adapted to all pneumatic ink direct-write printing devices, demonstrating its high application value. It offers a novel solution for reducing printing costs and improving the edge length of printed products using existing pneumatic ink direct-write printing equipment.

[0010] In this technical solution, by setting a limiting strip intersecting with the printed lines in the process edge area, and specifically setting the material of the limiting strip according to the material of the ink to be printed, the length of the process edge in the process edge area can be effectively shortened. Specifically, when the printing needle moves to the process edge area, based on the mutual repulsion between the ink and the limiting strip, the ink is repelled and flows into the ink retention area, preventing further outward expansion, thus shortening the length of the process edge. Furthermore, this technical solution also fully utilizes the space between the printed lines by specifically limiting the position of the limiting strip, namely, setting the technical feature of the limiting strip intersecting with the printed lines, providing space guarantee for the retention of residual ink in the ink retention area.

[0011] Preferably, the limiting strip includes an edge sealing limiting strip disposed at the boundary between the reserved area and the process edge area to isolate the printed lines of the reserved area and the process edge area.

[0012] In principle, placing two or more limiting strips at any position in the process edge area can effectively intercept ink and shorten the process edge. Even when a limiting strip is placed at the end furthest from the retention area, it can still prevent process edge problems caused by ink leveling. In this technical solution, the position of one of the multiple limiting strips is limited to the boundary between the retention area and the process edge area. At this time, in addition to achieving the above-mentioned conventional effects of ink interception and shortening the process edge, the limiting strip can also effectively improve the uniformity of the shape of the printed line ends in the retention area, and facilitate the trimming of the retention area and the process edge area after subsequent curing. Specifically, the printed lines in the reserved area are generally thinner than those in the process edge area. Therefore, due to ink tension, ink from the process edge area will flow onto the printed lines in the reserved area, affecting the shape of the printed lines at the ends of the reserved area. By setting a limiting strip of a special material between the reserved area and the process edge area, on the one hand, it effectively prevents ink from the ink retention area from flowing along the ink limiting strip to the reserved area, affecting its accuracy; on the other hand, it prevents ink on the printed lines at the ends of the reserved area from flowing along the edge limiting strip, thus resulting in a better overall shape of the printed lines. Furthermore, as mentioned above, to ensure the uniformity of the printed product's shape, current practice only cuts the printed lines from the reserved area as the printed product. In this technical solution, setting an edge limiting strip facilitates the cutting of the printed product, reduces the difficulty of cutting, and ultimately results in a higher overall accuracy of the printed product.

[0013] Preferably, the limiting strip also includes an intercepting limiting strip disposed on the side away from the reserved area and disposed parallel to the edge sealing limiting strip.

[0014] In theory, any shape of intercepting and limiting strip, as long as it intersects with all printed lines in the retention area, can form a relatively complete ink-retaining area with other limiting strips, intercepting residual ink and shortening the process edge length. However, in this technical solution, by setting the intercepting and limiting strip parallel to the sealing and limiting strip, the width of the total ink-retaining area remains consistent along the printing direction. This means that regardless of the shape of the limiting strip between the sealing and limiting strips, when the printing needle moves from the sealing and limiting strips to the intercepting and limiting strips, an equal amount of ink will be intercepted each time. If the intercepting and limiting strips are not parallel to the sealing and limiting strips, there will be a difference in the amount of ink intercepted at different printed line positions each time the printing needle moves from the sealing and limiting strips to the intercepting and limiting strips. This difference requires more limiting strips for ink interception, thus resulting in a longer process edge. Therefore, this technical solution, by designing the position and shape of the intercepting and limiting strips, can reduce the number of limiting strips required and further shorten the process edge.

[0015] Preferably, the limiting strip further includes a separator strip for dividing the ink retention area, and the separator strip is intersecting with the limiting strip.

[0016] When the ink retention area has a high ink content, the ink tends to flow horizontally towards both ends of the area. This flow is instantaneous, meaning that as soon as the print head passes through the ink retention area, the ink at that location immediately flows towards both ends of the area. Therefore, when the print head moves back to the corresponding ink retention area for printing, it will come into contact with the ink that has already flowed onto its printing path. To solve this problem, this technical solution uses separators between the printed lines. This avoids ink residue on the print head surface caused by ink horizontalization when the ink content in the retention area is high, further preventing ink from being retained on the print head surface and flowing into the next ink retention area, thus shortening the length of the process edge to some extent.

[0017] Preferably, the limiting strip further includes a barrier strip disposed at both ends of the ink retention area, with both ends of the barrier strip connected to the edge sealing limiting strip and the intercepting limiting strip, respectively.

[0018] In principle, by setting two limiting strips in the process edge area, an ink retention area can be formed between the two limiting strips. Therefore, when ink is sprayed into the ink retention area, it is locked in the ink retention area due to the repulsion between the ink and the limiting strips. When the ink content locked in the ink retention area is relatively large, the ink tends to flow level towards both ends of the ink retention area. In this technical solution, by setting barrier strips at both ends of the ink retention area, the ink can be locked in the ink retention area formed by the limiting strips and barrier strips. This can prevent the formation of a wider process edge on the printed area of ​​the substrate due to ink leveling when there is a large amount of ink in the ink retention area.

[0019] Preferably, the width of the defining strip is 1~30μm, and the width of the ink retention area is 50~300μm.

[0020] The width settings of the limiting strip and the ink retention area directly affect the shortening length of the process edge. Specifically, intuitively, the wider the limiting strip and the ink retention area, the longer they occupy in the printing direction, resulting in a longer process edge without other parameters changing. Accordingly, in this technical solution, by limiting the width of the limiting strip to between 1 and 30 μm and the width of the ink retention area to between 50 and 300 μm, the length of the process edge can be directly and effectively reduced. Furthermore, this width limitation feature can be combined with the material properties of the printing ink itself to prevent ink from overflowing the limiting strip and causing the process edge to lengthen.

[0021] Preferably, the width of the ink defining strip is 10 μm.

[0022] The method for preparing any of the above-mentioned substrates for pneumatic ink direct writing printing includes the following steps:

[0023] S101. Divide the process edge area and the reserved area on the substrate;

[0024] S102. Select the material of the limiting strip according to the printing ink material, wherein the limiting strip material and the printing ink material have a mutual repulsive force;

[0025] S103. At least two limiting strips are set in the process edge area using the limiting strip material, and an ink retention area is formed between adjacent two limiting strips.

[0026] This application, through a technical solution of setting two or more limiting strips in the process edge area and forming an ink retention area between the limiting strips, can retain more ink and provide storage guarantee for the accumulation of more ink.

[0027] Preferably, the preparation method further includes:

[0028] S104. At least one dividing strip is set in the process edge area using the limiting strip material, and the dividing strip is used to divide the ink retention area.

[0029] This technical solution, by further setting a separator between the two limiting strips, can avoid the phenomenon of ink residue on the surface of the printing needle due to ink leveling when the ink content in the ink retention area is high, and further prevent the ink on the surface of the printing needle from being retained in the next ink retention area, thus shortening the length of the process edge to a certain extent.

[0030] Preferably, the forming method of the limiting strip and the separator strip includes one or more of 3D printing, photolithography and printing.

[0031] The application of any of the above-mentioned substrates includes the following steps:

[0032] S201. Identify and align the substrate placed on the printing platform, and print the lines according to the planned printing path.

[0033] S202. After printing is complete, remove the substrate and cure it.

[0034] S203. Cut along the edge sealing strip to obtain the printed product.

[0035] Compared with the prior art, this application has the following beneficial effects:

[0036] Compared to existing technologies that shorten the edge length of pneumatic ink direct-write printing by adjusting the pressure applied to the ink in the printing equipment, this application takes a different approach, focusing on the substrate itself. It provides a substrate that effectively shortens the edge length of pneumatic ink direct-write printing even at high-speed printing. Furthermore, since this application does not involve modifying the pneumatic ink direct-write printing equipment, the substrate can be adapted to most pneumatic ink direct-write printing devices, demonstrating its high application value. It offers a novel solution for reducing printing costs and improving the edge length of printed products using existing pneumatic ink direct-write printing equipment. Specifically, by setting two or more limiting strips that repel the ink material in the edge area, this application effectively traps the ink. When ink is sprayed into the edge area, the repulsive force between the ink and the limiting strips forces the ink into the ink retention area, preventing further outward expansion and thus shortening the edge length. Secondly, this application, by specifically defining the position of the limiting strip, fully utilizes the space between the printed lines, providing sufficient space for ink retention in the ink retention area. Thirdly, by using barrier strips and separator strips, this application locks the ink in the ink retention area formed by the limiting strips and barrier strips or separator strips, achieving control over the length of the process edge and significantly improving the product's cutting utilization rate. Furthermore, by limiting the width of the limiting strips, this application can coordinate with the ink's material properties to create a stronger mutual repulsion force, improving the accuracy and uniformity of the printed lines in the retention area. Attached Figure Description

[0037] To clearly illustrate the embodiments, the drawings in the accompanying drawings will be briefly described below:

[0038] Figure 1 A top view of a substrate provided in an embodiment of this application;

[0039] Figure 2 A top view of substrate two provided in an embodiment of this application;

[0040] Figure 3 A top view of substrate three provided in an embodiment of this application;

[0041] Figure 4 A flowchart illustrating the substrate fabrication method provided in the embodiments of this application;

[0042] Figure 5 A flowchart illustrating the application of a substrate as provided in an embodiment of this application.

[0043] Attached reference numerals: 1. Reservation area; 2. Process edge area; 21. Limiting strip; 211. Edge sealing limiting strip; 212. Interception limiting strip; 22. Ink retention area; 221. Barrier strip; 222. Separator strip. Detailed Implementation

[0044] The present application will be further described below with reference to specific embodiments. Those skilled in the art will be able to implement the present application based on these descriptions. Furthermore, the embodiments of the present application described below are generally only a part of the embodiments of the present application, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort should fall within the scope of protection of the present application.

[0045] Example 1

[0046] like Figure 1 As shown, the substrate for pneumatic direct-write printing disclosed in this embodiment includes:

[0047] The substrate includes a retention area 1 for printing lines using a pneumatic direct-write printing device. Along the printing direction of the lines, the substrate also includes two process edge areas 2 located at both ends of the retention area 1. Each process edge area 2 has multiple limiting strips 21 intersecting the printed lines, and an ink retention area 22 is formed between adjacent limiting strips 21. In this embodiment, by setting limiting strips 21 in the process edge areas 2, the length of the process edge can be shortened. Specifically, during printing, after the printing needle moves from the retention area 1 to the process edge area 2, it will pass through the aforementioned multiple limiting strips 21 sequentially. Correspondingly, under the feeding pressure, most of the ink on the surface of the printing needle will be sprayed between the two limiting strips 21—that is, within the ink retention area 22. This prevents the ink from expanding outwards along the printing direction, thereby shortening the length of the process edge. Furthermore, by limiting the position of the limiting strips 21, the space of the ink retention area 22 is effectively increased, providing space assurance for ink retention within the ink retention area 22. Based on this, in order to effectively lock the ink within the ink retention area 22, the limiting strip 21 and the printing ink have a mutual repulsive force in this embodiment.

[0048] To further control the shape of the printed lines within the reserved area 1, the limiting strip 21 in this embodiment includes an edge-sealing limiting strip 211 disposed at the boundary between the reserved area 1 and the process edge area 2. As described above, during the printing process, the printing needle will experience acceleration, uniform speed, and deceleration. Therefore, under the premise of uniform feeding pressure, the formed printed lines have the technical problem of varying thickness. Driven by ink tension, the ink at the acceleration / deceleration boundary will flow along the printed lines. Therefore, by setting an edge-sealing limiting strip 211 at the boundary between the reserved area 1 and the process edge area 2, which has a repulsive force with the ink, the above problem will be solved very well. Moreover, the setting of the edge-sealing limiting strip 211 will facilitate the subsequent cutting of the printed products. In addition, to reduce the shape deviation between the printed lines at both ends and the middle section of the reserved area 1, uniform printing speed can be maintained at the end of the process edge area 2 near the edge-sealing limiting strip 211 during the printing process.

[0049] The width settings of the limiting strip 21 and the ink retention area 22 directly affect the edge finishing effect of the process. Intuitively, the wider the limiting strip 21 and the ink retention area 22, the longer they occupy in the printing direction, resulting in a longer process edge without changing other parameters. Therefore, in this embodiment, the width of the ink retention area 22 is set to 50μm, and correspondingly, the width of the limiting strip 21 is set to 1μm.

[0050] Example 2

[0051] like Figure 2 As shown, the substrate for pneumatic direct-write printing disclosed in this embodiment includes:

[0052] The substrate includes a retention area 1 for printing lines using a pneumatic direct-write printing device. Along the printing direction of the lines, the substrate also includes two process edge areas 2 located at both ends of the retention area 1. Each process edge area 2 has multiple limiting strips 21 intersecting the printed lines, and an ink retention area 22 is formed between adjacent limiting strips 21. In this embodiment, by setting limiting strips 21 in the process edge areas 2, the length of the process edge can be shortened. Specifically, during printing, after the printing needle moves from the retention area 1 to the process edge area 2, it will pass through the aforementioned multiple limiting strips 21 sequentially. Correspondingly, under the feeding pressure, most of the ink on the surface of the printing needle will be sprayed between the two limiting strips 21—that is, within the ink retention area 22. This prevents the ink from expanding outwards along the printing direction, thereby shortening the length of the process edge. Furthermore, by limiting the position of the limiting strips 21, the space of the ink retention area 22 is effectively increased, providing space assurance for ink retention within the ink retention area 22. Based on this, in order to effectively lock the ink within the ink retention area 22, the limiting strip 21 and the printing ink have a mutual repulsive force in this embodiment.

[0053] To further control the shape of the printed lines within the reserved area 1, the limiting strip 21 in this embodiment includes an edge-sealing limiting strip 211 disposed at the boundary between the reserved area 1 and the process edge area 2. As described above, during the printing process, the printing needle will experience acceleration, uniform speed, and deceleration. Therefore, under the premise of uniform feeding pressure, the formed printed lines have the technical problem of varying thickness. Driven by ink tension, the ink at the acceleration / deceleration boundary will flow along the printed lines. Therefore, by setting an edge-sealing limiting strip 211 at the boundary between the reserved area 1 and the process edge area 2, which has a repulsive force with the ink, the above problem will be solved very well. Moreover, the setting of the edge-sealing limiting strip 211 will facilitate the subsequent cutting of the printed products. In addition, to reduce the shape deviation between the printed lines at both ends and the middle section of the reserved area 1, uniform printing speed can be maintained at the end of the process edge area 2 near the edge-sealing limiting strip 211 during the printing process.

[0054] To further shorten the length of the process edge, in this embodiment, an intercepting and limiting strip 212 is also provided on the side away from the retention area 1. The intercepting and limiting strip 212 is arranged parallel to the sealing and limiting strip 211. Theoretically, any shape of intercepting and limiting strip 212, as long as it intersects with all the printed lines or their extensions in the retention area 1, can form a relatively complete ink retention area 22 with other limiting strips 21 to intercept the ink and shorten the length of the process edge. However, in this embodiment, by setting the intercepting and limiting strip 212 parallel to the sealing and limiting strip 211, the width of the total ink retention area 22 along the printing direction remains consistent. This means that no matter what shape of other limiting strips 21 are set between the sealing and limiting strip 211 and the intercepting and limiting strip 212, when the printing needle moves from the sealing and limiting strip 211 to the intercepting and limiting strip 212 each time, an equal amount of ink will be intercepted. Therefore, the number of limiting strips 21 can be reduced, which means that the process edge will be further shortened.

[0055] By setting two limiting strips 21 in the process edge region 2, an ink retention area 22 can be formed between the two limiting strips. Therefore, when ink is sprayed into the ink retention area 22, the ink will be locked in the ink retention area 22 due to the mutual repulsion between the ink and the limiting strips 21. When the ink content locked in the ink retention area 22 is relatively large, the ink tends to flow horizontally towards both ends of the ink retention area 22, forming a process edge on the substrate. To solve this problem, the substrate of this embodiment also has barrier strips 221 at both ends of the ink retention area 22, which are respectively connected to the sealing limiting strip 211 and the intercepting limiting strip 212.

[0056] Furthermore, the width settings of the limiting strip 21 and the ink retention area 22 directly affect the edge finishing effect of the process edge. Intuitively, the wider the limiting strip 21 and the ink retention area 22, the longer they occupy in the printing direction, resulting in a longer process edge without other parameters changing. Therefore, in this embodiment, the width of the ink retention area 22 is set to 300μm, and correspondingly, the width of the limiting strip 21 is set to 30μm.

[0057] Example 3

[0058] like Figure 3 As shown, the substrate for pneumatic direct-write printing disclosed in this embodiment includes:

[0059] The substrate includes a retention area 1 for printing lines using a pneumatic direct-write printing device. Along the printing direction of the lines, the substrate also includes two process edge areas 2 located at both ends of the retention area 1. Each process edge area 2 has multiple limiting strips 21 intersecting the printed lines, and an ink retention area 22 is formed between adjacent limiting strips 21. In this embodiment, by setting limiting strips 21 in the process edge areas 2, the length of the process edge can be shortened. Specifically, during printing, after the printing needle moves from the retention area 1 to the process edge area 2, it will pass through the aforementioned multiple limiting strips 21 sequentially. Correspondingly, under the feeding pressure, most of the ink on the surface of the printing needle will be sprayed between the two limiting strips 21—that is, within the ink retention area 22. This prevents the ink from expanding outwards along the printing direction, thereby shortening the length of the process edge. Furthermore, by limiting the position of the limiting strips 21 (i.e., by setting their intersection with the printed lines), the space of the ink retention area 22 is effectively increased, providing space assurance for ink retention within the ink retention area 22. Based on this, in order to effectively lock the ink within the ink retention area 22, the limiting strip 21 and the printing ink have a mutual repulsive force in this embodiment.

[0060] To further control the shape of the printed lines within the reserved area 1, the limiting strip 21 in this embodiment includes an edge-sealing limiting strip 211 disposed at the boundary between the reserved area 1 and the process edge area 2. As described above, during the printing process, the printing needle will experience acceleration, uniform speed, and deceleration. Therefore, under the premise of uniform feeding pressure, the formed printed lines have the technical problem of varying thickness. Driven by ink tension, the ink at the acceleration / deceleration boundary will flow along the printed lines. Therefore, by setting an edge-sealing limiting strip 211 at the boundary between the reserved area 1 and the process edge area 2, which has a repulsive force with the ink, the above problem will be solved very well. Moreover, the setting of the edge-sealing limiting strip 211 will facilitate the subsequent cutting of the printed products. In addition, to reduce the shape deviation between the printed lines at both ends and the middle section of the reserved area 1, uniform printing speed can be maintained at the end of the process edge area 2 near the edge-sealing limiting strip 211 during the printing process.

[0061] To further shorten the length of the process edge, in this embodiment, an intercepting and limiting strip 212 is also provided on the side away from the retention area 1. The intercepting and limiting strip 212 is arranged parallel to the sealing and limiting strip 211. Theoretically, any shape of intercepting and limiting strip 212, as long as it intersects with all the printed lines or their extensions in the retention area 1, can form a relatively complete ink retention area 22 with other limiting strips 21 to intercept the ink and shorten the length of the process edge. However, in this embodiment, by setting the intercepting and limiting strip 212 parallel to the sealing and limiting strip 211, the width of the total ink retention area 22 along the printing direction remains consistent. This means that no matter what shape of other limiting strips 21 are set between the sealing and limiting strip 211 and the intercepting and limiting strip 212, when the printing needle moves from the sealing and limiting strip 211 to the intercepting and limiting strip 212 each time, an equal amount of ink will be intercepted. Therefore, the number of limiting strips 21 can be reduced, which means that the process edge will be further shortened.

[0062] By setting two limiting strips 21 in the process edge region 2, an ink retention area 22 can be formed between the two limiting strips. Therefore, when ink is sprayed into the ink retention area 22, the ink is locked in the ink retention area 22 due to the mutual repulsion between the ink and the limiting strips 21. When the ink content locked in the ink retention area 22 is relatively large, the ink tends to flow horizontally towards both ends of the ink retention area 22, forming a process edge on the substrate. To solve this problem, the substrate of this embodiment also has barrier strips 221 at both ends of the ink retention area 22, which are respectively connected to the sealing limiting strip 211 and the intercepting limiting strip 212.

[0063] By setting the aforementioned barrier strip 221, ink flow out of the ink retention area 22 and forming a process edge can be effectively prevented. However, the leveling of ink towards both ends of the ink retention area 22 is instantaneous. This means that as soon as the printing needle passes through the ink retention area 22, the ink at that position in the ink retention area 22 will immediately flow towards both ends of the ink retention area 22. Therefore, when the printing needle moves to the corresponding ink retention area 22 again for printing, the printing needle may come into contact with the ink that has already flowed onto its printing path, which will affect subsequent printing. Therefore, to reduce the above-mentioned impact, the substrate of this embodiment also includes a partition strip 222 intersecting with the limiting strip 21. The partition strip 222 further limits the flow range of ink, preventing ink leveling from affecting the printing of the printing needle. To a certain extent, this setting can prevent ink on the surface of the printing needle from being carried into the next ink retention area 22, shortening the length of the process edge.

[0064] Furthermore, the width settings of the limiting strip 21 and the ink retention area 22 directly affect the edge finishing effect of the process edge. Intuitively, the wider the limiting strip 21 and the ink retention area 22, the longer they occupy in the printing direction, resulting in a longer process edge without other parameters changing. Therefore, in this embodiment, the width of the ink retention area 22 is set to 150μm, and correspondingly, the width of the limiting strip 21 is set to 10μm.

[0065] Example 4

[0066] like Figure 4 As shown, this embodiment discloses a method for preparing a substrate according to this application, including the following steps:

[0067] S101. Divide the substrate into reserved area 1 and process edge area 2 according to the printing path planning.

[0068] S102. Select the material of the limiting strip 21 according to the printing ink material. The limiting strip material and the printing ink material have a repulsive force. The repulsive force between the limiting strip material and the printing ink material can include molecular bond forces, magnetic repulsion forces, electrostatic repulsion forces, etc. For example, the ink material can be an acrylic resin, and correspondingly, the limiting strip material can be a fluorinated PI resin.

[0069] S103. At least two limiting strips 21 are provided in the process edge region 2 using limiting strip material, and an ink retention area 22 is formed between adjacent limiting strips 21; the limiting strips 21 include an edge sealing limiting strip 211 provided at the boundary between the retention region 1 and the process edge region 2, and an intercepting limiting strip 212 provided on the side away from the retention region. Specifically, the width of the limiting strip 21 is 30μm, and the spacing between adjacent limiting strips 21—that is, the width of the ink retention area—is 100μm.

[0070] S104. At least one dividing strip 222 is set in the process edge area 2 using a limiting strip material, wherein the dividing strip 222 is used to divide the ink retention area 22.

[0071] Furthermore, it should be noted that the forming methods of the aforementioned limiting strip 21 and separating strip 222 include one or more of 3D printing, photolithography, and printing.

[0072] Example 5

[0073] like Figure 5 As shown, this embodiment discloses the application of a substrate in pneumatic direct-write printing, including the following steps:

[0074] S201. The substrate placed on the printing platform is identified and aligned, and lines are printed according to the planned printing path. At this time, the printing needle reciprocates through the process edge area 2, the retention area 1, and the process edge area 2 in sequence. When the printing needle moves from the process edge area 2 to the retention area 1 or from the retention area 1 to the process edge area 2, the printing needle will move through multiple limiting strips 21 (including the sealing limiting strip 211) in sequence. Then, the ink sprayed between the limiting strips 21 will be intercepted and flowed into the ink retention area 22, thereby preventing the ink from flowing horizontally along the printing direction and generating an excessively long process edge.

[0075] S202. After printing, remove the substrate and cure it.

[0076] S203. Cut along the edge sealing strip 211 to obtain the printed product.

[0077] Although this document makes extensive use of figure reference numerals such as 1, reserved area, 2, process edge area, 21, limiting strip, 211, sealing limiting strip, 212, intercepting limiting strip, 22, ink retention area, 221, barrier strip, and 222, separator strip, the possibility of using other terms is not excluded. The use of these terms is solely for the convenience of describing and explaining the essence of this application; interpreting them as any additional limitation would contradict the spirit of this application.

Claims

1. A substrate for pneumatic direct-write printing, characterized in that, include: A reserved area is used by a pneumatic direct-write printing device to print lines; A process edge area, the process edge area being used for finishing the edges of the printed lines, the process edge area including at least two defining strips intersecting the printed lines, with an ink retention area between adjacent two defining strips; the defining strips include edge sealing defining strips disposed at the boundary between the reserved area and the process edge area, used to isolate the printed lines of the reserved area and the process edge area; The printed product is obtained by cutting along the edge sealing strip; the sealing strip and the printing ink have a repulsive force between them.

2. The substrate according to claim 1, characterized in that, The limiting strip also includes an intercepting limiting strip disposed on the side away from the reserved area and disposed parallel to the edge sealing limiting strip.

3. The substrate according to claim 2, characterized in that, The limiting strip also includes a separator strip for dividing the ink retention area, and the separator strip is intersecting with the limiting strip.

4. The substrate according to claim 2 or 3, characterized in that, The limiting strip also includes a barrier strip disposed at both ends of the ink retention area, with both ends of the barrier strip connected to the edge sealing limiting strip and the intercepting limiting strip, respectively.

5. The substrate according to claim 1, characterized in that, The width of the limiting strip is 1~30μm, and the width of the ink retention area is 50~300μm.

6. A method for preparing a substrate according to any one of claims 1 to 5, characterized in that, include: S101. Divide the process edge area and the reserved area on the substrate; S102. Select the material of the limiting strip according to the printing ink material, wherein the limiting strip material and the printing ink material have a mutual repulsive force; S103. At least two limiting strips are set in the process edge area using the limiting strip material, and an ink retention area is formed between two adjacent limiting strips.

7. The preparation method according to claim 6, characterized in that, Also includes: S104. At least one dividing strip is set in the process edge area using the limiting strip material, and the dividing strip is used to divide the ink retention area.

8. The preparation method according to claim 7, characterized in that, The forming methods of the limiting strip and the separating strip include one or more of 3D printing, photolithography and printing.

9. An application of the substrate according to any one of claims 1 to 5, characterized in that, include: S201. Identify and align the substrate placed on the printing platform, and print the lines according to the planned printing path. S202. After printing is complete, remove the substrate and cure it. S203. Cut along the edge sealing strip to obtain the printed product.

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