Low-dispersant aluminum-plastic film UV ink and preparation method thereof, and low-dispersant aluminum-plastic film UV ink jet printing reworkable method

Abstract

The present invention discloses a low-dispersant aluminum-plastic film UV ink and a preparation method thereof, as well as a method for printing and repairing aluminum-plastic film UV ink based on low-dispersant. The above-mentioned low-dispersant aluminum-plastic film UV ink comprises 30 to 40 parts of polybutadiene-modified acrylate; 40 to 55 parts of acrylate monomers; 5 to 10 parts of photoinitiator; 0.1 to 5 parts of pigment and 1 to 5 parts of leveling agent, and 0.01 to 0.2 parts of dispersant. The above-mentioned low-dispersant aluminum-plastic film UV ink, due to the introduction of a large amount of polybutadiene rubber structure, ensures that a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycles, good uniformity, good fluidity and stable system is prepared, which is conducive to forming a pattern prototype layer with exquisite and clear patterns and no yellowing and cracking, and also ensures that the adhesion between the pattern prototype layer and the aluminum-plastic film is more suitable and the low surface energy of the pattern prototype layer is more suitable, so as to meet the adsorption and detachment of the suction cup of the visual detection device, and facilitates the operator to quickly, labor-savingly and comprehensively repair.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum-plastic film UV ink, and in particular to a low-dispersant aluminum-plastic film UV ink and a preparation method thereof, and a low-dispersant aluminum-plastic film UV ink spray printing reworkable method. Background Art

[0002] The surface of portable energy storage batteries is usually printed with information such as manufacturer, model specifications, barcode, QR code, safety and environmental protection information. Early UV inks are cross-linked mesh structures that are difficult to dissolve and cannot be erased, resulting in portable energy storage batteries being unable to be repaired after printing errors, causing great waste. In order to solve the above technical problems, Chinese patent document No. CN117511295A discloses a battery aluminum-plastic film UV-LED curing inkjet ink and its preparation method and application.

[0003] However, the polyurethane blocks introduced by the polyurethane modified acrylate resin in the above-mentioned inkjet ink reduce the compatibility of the polyurethane modified acrylate resin with components such as acrylate monomers in the inkjet ink, resulting in the need to add more dispersants to solve the compatibility between the components of the inkjet ink, that is, the amount of dispersant reaches 0.3-0.7%. Too much dispersant will lead to a long stirring time to affect the preparation efficiency, and also cause a high preparation cost of the inkjet ink.

[0004] In addition, in actual applications, most electronic product manufacturers, such as automobiles, mobile phones, and various small electronic products, are usually only responsible for the assembly of various components, that is, the portable energy storage batteries they use are purchased in bulk, and the portable energy storage batteries need to be transported from Factory A to Factory B, and the temperature of the assembly workshop is usually within 20°C. When the temperature outside the assembly workshop is significantly higher than the temperature inside the assembly workshop, the portable energy storage batteries transported to the assembly workshop will experience a large temperature difference, that is, the portable energy storage batteries will undergo a hot and cold cycle. Although the polyurethane modified acrylate resin of the above-mentioned inkjet ink has a certain deformation amount, the mobility of the polyurethane molecular chain is limited under low temperature conditions, resulting in a decrease in the flexibility and increase in brittleness of the inkjet ink, causing the printed information of the portable energy storage battery to be easily detached due to external friction during the assembly process. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system, so that the low-dispersant aluminum-plastic film UV ink can not only form a pattern prototype layer with exquisite and clear patterns on the surface of the aluminum-plastic film without yellowing and cracking, but also ensure that the pattern prototype layer formed after the pre-curing operation has a more suitable adhesion to the aluminum-plastic film and the low surface energy of the pattern prototype layer is more suitable, so as to ensure that the pattern prototype layer can better meet the adsorption and detachment of the suction cup of the visual detection device, and also ensure that a simple non-polar wiping liquid can be used to achieve rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, and reduce the problem of nozzle clogging during the printing process. The low-dispersant aluminum-plastic film UV ink and its preparation method, as well as the aluminum-plastic film UV ink based on the low-dispersant printing reworkable method.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A low-dispersant aluminum-plastic film UV ink comprises the following mass components:

[0008]

[0009] In one embodiment, the preparation of the polybutadiene modified acrylate comprises the following steps:

[0010] Carboxyl-terminated polytetrahydrofuran ether is obtained by subjecting polytetrahydrofuran ether diol and acid anhydride to a ring-opening reaction;

[0011] Esterifying the hydroxy-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether to obtain the hydroxy-terminated polybutadiene-capped polyester diol;

[0012] The terminal hydroxyl polybutadiene-capped polyester diol is subjected to a capping esterification reaction with an acrylic compound to obtain the polybutadiene-modified acrylate.

[0013] In one embodiment, the molecular weight of the polytetramethylene glycol is 800 g / mol to 2000 g / mol; and / or,

[0014] The acid anhydride comprises at least one of methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride and maleic anhydride; and / or,

[0015] The temperature of the ring-opening reaction is 90° C. to 120° C.; the time of the ring-opening reaction is 2 h to 4 h; and / or,

[0016] The mass ratio of the polytetrahydrofuran ether diol to the acid anhydride is 1:1; and / or,

[0017] The molecular weight of the hydroxyl-terminated polybutadiene is 1000 g / mol to 2000 g / mol, and the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.5 mmol / g to 1.0 mmol / g; and / or,

[0018] The mass ratio of the terminal hydroxyl polybutadiene to the terminal carboxyl polytetrahydrofuran ether is (2-3):1; and / or,

[0019] The temperature of the esterification reaction is 90°C to 120°C; the time of the esterification reaction is 6h to 12h; and / or,

[0020] The acrylic compound includes at least one of acrylic acid, methacrylic acid and carboxylic acrylate; and / or,

[0021] The temperature of the end-capping esterification reaction is 90° C. to 120° C., and the time of the end-capping esterification reaction is 6 h to 12 h; and / or, the mass ratio of the terminal hydroxyl polybutadiene end-capped polyester diol to the acrylic compound is (15 to 20):1.

[0022] In one embodiment, the acrylic acid ester monomer includes at least one of 4-acryloylmorpholine, ethyl acrylate, butyl acrylate, hydroxypropyl acrylate and methyl methacrylate; and / or,

[0023] The dispersant includes at least one of SOLSPERSE 39000 and EFKA PX 4301.

[0024] In one embodiment, the photoinitiator includes at least one of phenylbis(2.4.6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenyl ketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone.

[0025] In one embodiment, the pigment includes at least one of carbon black, copper chrome black, titanium dioxide, phthalocyanine blue and lemon yellow.

[0026] In one embodiment, the leveling agent includes at least one of a silicone leveling agent and an acrylic leveling agent.

[0027] A method for preparing low-dispersant aluminum-plastic film UV ink comprises the following steps: mixing polybutadiene-modified acrylate, acrylate monomers, photoinitiators, pigments and leveling agents to obtain the low-dispersant aluminum-plastic film UV ink described in any of the above embodiments.

[0028] A low-dispersant-based aluminum-plastic film UV ink jet printing reworkable method comprises the following steps:

[0029] Obtain the aluminum-plastic film UV ink with low dispersant as described in any one of the above items;

[0030] The low-dispersant aluminum-plastic film UV ink is used to perform a spray printing operation on the aluminum-plastic film on the surface of the portable energy storage battery to form a pattern information layer on the aluminum-plastic film on the surface of the portable energy storage battery;

[0031] Pre-curing the pattern information layer to preliminarily shape the pattern information layer on the aluminum-plastic film to obtain a pattern prototype layer;

[0032] Automatically inspecting the pattern prototype layer by a visual inspection device;

[0033] If the pattern prototype layer is consistent with the preset printing pattern information, the next step of deep curing operation is performed on the pattern prototype layer; if not, the pattern prototype layer is repaired.

[0034] In one embodiment, the optical power of the pre-curing operation is 6W / cm 2 ~8W / cm 2 and / or,

[0035] The optical power of the deep curing is 12W / cm 2 ~15W / cm 2 .

[0036] Compared with the prior art, the present invention has at least the following advantages:

[0037] 1) Since the molecular structure of polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure (-CH2CH=CHCH2-)n, and since the carbon-carbon double bonds and single bonds in the molecular chain of the polybutadiene rubber structure are arranged alternately, a relatively regular structure is formed. This regular structure enables the polybutadiene-modified acrylate to interact well with the functional groups of acrylate monomers, photoinitiators, pigments and leveling agents in the aluminum-plastic film UV ink, that is, to ensure that the polybutadiene-modified acrylate has a lower surface tension, which helps to improve the compatibility of the polybutadiene-modified acrylate with the acrylate monomers, photoinitiators, pigments and leveling agents, so that they can be more closely combined. In this way, the present invention only needs to add a low amount of dispersant to prepare a uniform and stable low-dispersant aluminum-plastic film UV ink, which effectively reduces the amount of dispersant used, effectively avoids the problem that the traditional dispersant has a long stirring time due to a large amount of added dispersant, which affects the preparation efficiency, and also reduces the preparation cost of the low-dispersant aluminum-plastic film UV ink.

[0038] 2) Compared with polyurethane modified acrylate resin, since the polybutadiene rubber structure in polybutadiene modified acrylate is relatively simple and uniform, polybutadiene modified acrylate is easy to maintain the flexibility and activity of the molecular chain at low temperatures, so that polybutadiene modified acrylate has excellent low temperature resistance, thereby ensuring that the low dispersant aluminum plastic film UV ink can still maintain good flexibility under long-term low temperature conditions, to ensure that the printed information of the portable energy storage battery will not be easily affected by external friction during the assembly process and will not fall off, which is especially suitable for application switching in different scenarios with large temperature differences.

[0039] 3) Due to the carbon-carbon double bonds and acrylates in the polybutadiene rubber structure in the polybutadiene modified acrylate, the polybutadiene modified acrylate can more easily interact with the nylon layer on the surface of the aluminum-plastic film, thereby forming a stronger chemical bond or physical adsorption, thereby enhancing the adhesion of the low dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In addition, the flexibility and elasticity of the polybutadiene rubber structure also help the low-dispersant aluminum-plastic film UV ink to form a close fit on the surface of the aluminum-plastic film, further improving the adhesion of the low-dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In this way, the adhesion of the low-dispersant aluminum-plastic film UV ink to the pattern prototype layer after the subsequent pre-curing operation is more suitable to ensure that the pattern prototype layer will not break itself during the automatic adsorption process, and that the pattern prototype layer can be better separated from the surface of the aluminum-plastic film. It also ensures that a simple non-polar wiping liquid can be used to quickly, labor-savingly and completely remove the erroneous pattern prototype layer without scratches, and effectively reduce damage to the nylon layer to avoid damage to the nylon layer of the aluminum-plastic film.

[0040] 4) Since the molecular structure of polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure, the non-polar wiping liquid can be physically adsorbed with the surface of the polybutadiene rubber, so that the solvent molecules of the non-polar wiping liquid can penetrate into the tiny gaps on the surface of the polybutadiene rubber structure, thereby playing a good cleaning role. The physical adsorption of the non-polar wiping liquid and the polybutadiene rubber is relatively mild, and the damage to the nylon layer is relatively small. In this way, the erroneous pattern prototype layer can be quickly, labor-savingly and completely removed without the need to use a special ink cleaning agent, and there is no scratch. The use of a non-polar wiping liquid can effectively reduce the damage to the nylon layer, so as to avoid the problem of damage to the nylon layer of the aluminum-plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a flow chart of a method for reworkable printing of aluminum-plastic film UV ink based on low dispersant according to one embodiment of the present invention;

[0043] Figure 2 This is a process diagram of wiping an erroneous pattern prototype layer on the aluminum-plastic film of a portable energy storage battery in Example 1 of the present invention. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] The present invention discloses a low-dispersant aluminum-plastic film UV ink, comprising 30 to 40 parts of polybutadiene-modified acrylate, 40 to 55 parts of acrylate monomers, 5 to 10 parts of photoinitiator, 0.1 to 5 parts of pigment, 1 to 5 parts of leveling agent and 0.01 to 0.2 parts of dispersant.

[0048] The above-mentioned low-dispersant aluminum-plastic film UV ink has a relatively regular structure because the molecular structure of the polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure (-CH2CH=CHCH2-)n, and because the carbon-carbon double bonds and single bonds in the molecular chain of the polybutadiene rubber structure are arranged alternately. This regular structure enables the polybutadiene-modified acrylate to interact well with the functional groups of the acrylate monomer, photoinitiator, pigment and leveling agent in the aluminum-plastic film UV ink, that is, to ensure that the polybutadiene-modified acrylate has a lower surface tension, which helps to improve the compatibility of the polybutadiene-modified acrylate with the acrylate monomer, photoinitiator, pigment and leveling agent, so that they can be more closely combined. In this way, the present invention only needs to add a low amount of dispersant to prepare a uniform and stable low-dispersant aluminum-plastic film UV ink, which effectively reduces the amount of dispersant used, effectively avoids the problem that the traditional dispersant has a long stirring time due to a large amount of added dispersant, which affects the preparation efficiency, and also reduces the preparation cost of the low-dispersant aluminum-plastic film UV ink. Furthermore, compared with polyurethane modified acrylate resin, since the polybutadiene rubber structure in polybutadiene modified acrylate is relatively simple and uniform, polybutadiene modified acrylate is easy to maintain the flexibility and activity of the molecular chain at low temperature, so that polybutadiene modified acrylate has excellent low temperature resistance, thereby ensuring that low dispersant aluminum-plastic film UV ink can still maintain good flexibility under long-term low temperature conditions, so as to ensure that the printed information of portable energy storage batteries will not be easily detached due to external friction during the assembly process, and is particularly suitable for application switching in different scenarios with large temperature differences. Furthermore, due to the carbon-carbon double bonds and acrylates in the polybutadiene rubber structure in polybutadiene modified acrylate, polybutadiene modified acrylate can more easily interact with the nylon layer on the surface of the aluminum-plastic film, thereby forming a stronger chemical bond or physical adsorption, thereby enhancing the adhesion of low dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In addition, the flexibility and elasticity of the polybutadiene rubber structure also help the low-dispersant aluminum-plastic film UV ink to form a close fit on the surface of the aluminum-plastic film, further improving the adhesion of the low-dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In this way, the adhesion of the low-dispersant aluminum-plastic film UV ink to the pattern prototype layer after the subsequent pre-curing operation is more suitable to ensure that the pattern prototype layer will not break itself during the automatic adsorption process, and that the pattern prototype layer can be better separated from the surface of the aluminum-plastic film. It also ensures that a simple non-polar wiping liquid can be used to quickly, labor-savingly and completely remove the erroneous pattern prototype layer without scratches, and effectively reduce damage to the nylon layer to avoid damage to the nylon layer of the aluminum-plastic film.

[0049] In order to better understand the technical scheme and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. The low-dispersant aluminum-plastic film UV ink of one embodiment includes the following components by mass: 30 to 40 parts of polybutadiene-modified acrylate; 40 to 55 parts of acrylate monomers; 5 to 10 parts of photoinitiator; 0.1 to 5 parts of pigment; 1 to 5 parts of leveling agent and 0.01 to 0.2 parts of dispersant.

[0050] It can be understood that in the present disclosure, a large amount of polybutadiene is introduced into the main chain of acrylic acid, so that the molecular structure of polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure (-CH2CH=CHCH2-)n, and because the carbon-carbon double bonds and single bonds in the molecular chain of the polybutadiene rubber structure are arranged alternately, a relatively regular structure is formed, and this regular structure enables the polybutadiene-modified acrylate to interact well with the functional groups of acrylate monomers, photoinitiators, pigments and leveling agents in the aluminum-plastic film UV ink, that is, to ensure that the polybutadiene-modified acrylate can be well coated with the acrylic acid ester monomers, photoinitiators, pigments and leveling agents in the aluminum-plastic film UV ink. The diene-modified acrylate has a lower surface tension, which helps to improve the compatibility of the polybutadiene-modified acrylate with acrylate monomers, photoinitiators, pigments and leveling agents, so that they can be more closely combined together. In this way, the present invention only needs to add a low amount of dispersant to prepare a uniform and stable low-dispersant aluminum-plastic film UV ink, which effectively reduces the amount of dispersant used, effectively avoids the problem of a traditional dispersant that causes a long stirring time due to a large amount of added dispersant, thereby affecting the preparation efficiency, and also reduces the preparation cost of the low-dispersant aluminum-plastic film UV ink.

[0051] It can also be understood that, relative to polyurethane-modified acrylate resin, since the polybutadiene rubber structure in polybutadiene-modified acrylate is relatively simple and uniform, polybutadiene-modified acrylate is easy to maintain the flexibility and activity of the molecular chain at low temperatures, so that polybutadiene-modified acrylate has excellent low-temperature resistance, thereby ensuring that the low-dispersant aluminum-plastic film UV ink can still maintain good flexibility under long-term low-temperature conditions, to ensure that the printed information of the portable energy storage battery will not be easily affected by external friction during the assembly process and will not fall off, which is especially suitable for application switching in different scenarios with large temperature differences.

[0052] It can also be understood that due to the carbon-carbon double bonds and acrylates in the polybutadiene rubber structure in the polybutadiene modified acrylate, the polybutadiene modified acrylate can more easily interact with the nylon layer on the surface of the aluminum-plastic film, thereby forming a stronger chemical bond or physical adsorption, thereby enhancing the adhesion of the low-dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In addition, the flexibility and elasticity of the polybutadiene rubber structure also help the low-dispersant aluminum-plastic film UV ink to form a close fit on the surface of the aluminum-plastic film, further improving the adhesion of the low-dispersant aluminum-plastic film UV ink on the surface of the aluminum-plastic film. In this way, the adhesion of the low-dispersant aluminum-plastic film UV ink to the pattern prototype layer after the subsequent pre-curing operation is more suitable to ensure that the pattern prototype layer will not break itself during the automatic adsorption process, and that the pattern prototype layer can be better separated from the surface of the aluminum-plastic film. It also ensures that a simple non-polar wiping liquid can be used to quickly, labor-savingly and completely remove the erroneous pattern prototype layer without scratches, and effectively reduce damage to the nylon layer to avoid damage to the nylon layer of the aluminum-plastic film.

[0053] It should be noted that polybutadiene is partially introduced into some solder mask inks, such as Chinese patent document No. CN 118772690A which discloses polybutadiene acrylic epoxy resin solder mask ink and its preparation method. However, in general, a larger amount of dispersant is required to solve the compatibility of component A and component B, that is, the amount of dispersant is 0.5 to 1 part, and adding more dispersant will lead to too long stirring time, resulting in low preparation efficiency and high cost. In addition, since the polybutadiene acrylic epoxy resin solder mask ink has a high correlation density after curing, a special ink cleaning agent is required to achieve rapid rework. In order to achieve rapid rework, a higher concentration of special ink cleaning agent is usually selected for wiping. However, the higher concentration of special ink cleaning agent contains more surfactants, and general surfactants are usually oleophilic at one end and hydrophilic at the other end. Since the nylon surface on the aluminum-plastic film has a strong lipophilicity, the special ink cleaning agent will have residual surfactants after cleaning, which leads to the problem of residual scratches after wiping with the traditional special ink cleaning agent, thus affecting the appearance of the aluminum-plastic film.

[0054] Therefore, in the present application, when in use, after the low-dispersant aluminum-plastic film UV ink is pre-cured, a non-polar wiping liquid is used to wipe the low-dispersant aluminum-plastic film UV ink. Since the molecular structure of polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure, the non-polar wiping liquid can be physically adsorbed with the surface of the polybutadiene rubber, so that the solvent molecules of the non-polar wiping liquid can penetrate into the tiny gaps on the surface of the polybutadiene rubber structure, thereby playing a good cleaning role, and the physical adsorption of the non-polar wiping liquid with the polybutadiene rubber is relatively mild, and the damage to the nylon layer is relatively small. In this way, without the need to use a special ink cleaning agent, the faulty pattern prototype layer can be quickly, labor-savingly and completely removed without scratches, and the use of a non-polar wiping liquid can effectively reduce the damage to the nylon layer, so as to avoid the problem of damage to the nylon layer of the aluminum-plastic film, such as Figure 2 shown.

[0055] In one embodiment, the preparation of the polybutadiene modified acrylate comprises the following steps: first, a ring-opening reaction is performed on polytetrahydrofuran ether diol and anhydride to obtain carboxyl-terminated polytetrahydrofuran ether. Specifically, the specific reaction principle of the ring-opening reaction of polytetrahydrofuran ether diol and methyl hexahydrophthalic anhydride is as follows:

[0056]

[0057] Next, the hydroxyl-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether are subjected to an esterification reaction to obtain a hydroxyl-terminated polybutadiene-terminated polyester diol; specifically, the principle of the esterification reaction of the hydroxyl-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether is as follows:

[0058]

[0059] Next, the hydroxyl-terminated polybutadiene-capped polyester diol is subjected to an end-capping esterification reaction with an acrylic compound to obtain the polybutadiene-modified acrylate. Specifically, in one embodiment, the acrylic compound includes at least one of acrylic acid, methacrylic acid and carboxyl acrylate.

[0060] In one embodiment, a hydroxyl-terminated polybutadiene-capped polyester diol is subjected to an end-capping esterification reaction with acrylic acid to obtain the following polybutadiene-modified acrylate:

[0061]

[0062] It can be understood that if a low molecular weight polytetramethylene ether diol is used, such as when the molecular weight of polytetramethylene ether is lower than 800 g / mol, the hardness of the polybutadiene-modified acrylate prepared subsequently is relatively high but the flexibility is low. If the molecular weight of polytetramethylene ether diol is higher than 2000 g / mol, the flexibility of the polybutadiene-modified acrylate prepared subsequently is relatively high but the hardness is low. Therefore, in one embodiment, by controlling the molecular weight of the polytetramethylene ether diol to 8 00g / mol~2000g / mol, to ensure that the flexibility and hardness of the polybutadiene modified acrylate prepared subsequently are more suitable and the transparency is high, so as to ensure that the prepared low dispersant aluminum-plastic film UV ink has good compatibility, good hot and cold cycle, good uniformity, good fluidity and stable system, to ensure that the pattern prototype layer formed after the subsequent pre-curing operation has more suitable adhesion to the aluminum-plastic film, so as to better meet the adsorption force of the suction cup, and also facilitate the operator to quickly, comprehensively and labor-savingly wipe off the erroneous pattern prototype layer.

[0063] It is worth mentioning that in the present disclosure, by controlling the molecular weight of polytetramethylene ether diol to 800 g / mol to 2000 g / mol, the flexibility of the prepared polybutadiene-modified acrylate is ensured to be suitable, which effectively avoids the high correlation density of the pattern prototype layer formed after the pre-curing operation, which is not conducive to the operator to quickly, comprehensively and labor-savingly erase the erroneous pattern prototype layer.

[0064] It can also be understood that, due to the good uniformity, good fluidity and stable system of the low-dispersant aluminum-plastic film UV ink, it is ensured that during the subsequent pre-curing operation, light can better penetrate the bottom of the pattern information layer, so as to ensure that the pattern information layer can be quickly cured using less light radiation energy, while also ensuring that the formed pattern prototype layer has a more suitable adhesion to the aluminum-plastic film, and also reducing the problem of nozzle clogging during the printing process.

[0065] Furthermore, in a preferred embodiment, the molecular weight of the polytetramethylene ether diol is 1000 g / mol.

[0066] In one embodiment, the acid anhydride includes at least one of methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride and maleic anhydride.

[0067] In one embodiment, the ring-opening reaction temperature is 90°C to 120°C; the ring-opening reaction time is 2h to 4h, especially in combination with the mass ratio of the polytetrahydrofuran ether diol to the acid anhydride being 1:1, to ensure that the polytetrahydrofuran ether diol and the acid anhydride can just fully react to generate a carboxyl-terminated polytetrahydrofuran ether with good transparency. Specifically, when the polytetrahydrofuran ether diol and the acid anhydride react for 2h to 4h until the acid value is stable, it can be determined that the polytetrahydrofuran ether diol and the acid anhydride have just fully reacted.

[0068] It can be understood that in one embodiment, by controlling the molecular weight of the terminal hydroxyl polybutadiene to be 1000g / mol-2000g / mol and the hydroxyl value of the terminal hydroxyl polybutadiene to be 0.5mmol / g-1.0mmol / g, the flexibility and hardness of the terminal hydroxyl polybutadiene are ensured to be more suitable, thereby ensuring that the flexibility and hardness of the polybutadiene-modified acrylate prepared subsequently are more suitable and the transparency is high, thereby ensuring that the prepared low-dispersant aluminum-plastic film UV ink has good compatibility, good hot and cold cycles, good uniformity, good fluidity and a stable system, so as to ensure that the adhesion between the pattern prototype layer formed after the subsequent pre-curing operation and the aluminum-plastic film is more suitable, and on the premise of ensuring that the pattern prototype layer can better meet the adsorption force of the suction cup of the visual detection device, it is also ensured that a simple non-polar wiping liquid can be used to achieve the rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, thereby effectively reducing the damage to the nylon layer to avoid the problem of damage to the nylon layer of the aluminum-plastic film. In addition, the low-dispersant aluminum-plastic film UV ink with good uniformity is conducive to the light to better penetrate the bottom of the pattern information layer, so as to ensure that the pattern information layer can be quickly cured using less light radiation energy, while also ensuring that the formed pattern prototype layer has a more appropriate adhesion to the aluminum-plastic film, and also reducing the problem of nozzle clogging during the printing process.

[0069] Furthermore, in one embodiment, the mass ratio of the terminal hydroxyl polybutadiene to the terminal carboxyl polytetrahydrofuran ether is (2-3):1; in particular, the temperature of the esterification reaction is 90°C to 120°C; the time of the esterification reaction is 6h to 12h, so as to ensure that the terminal hydroxyl polybutadiene and the terminal carboxyl polytetrahydrofuran ether can just fully react to generate a terminal hydroxyl polybutadiene-capped polyester diol with good transparency.

[0070] It should be noted that in the general mixing reaction process, the mixing device is usually unsealed, which will cause the terminal hydroxyl polybutadiene and the terminal carboxyl polytetrahydrofuran ether to easily generate more bubbles during the reaction process. If these bubbles are not removed, these bubbles will act as scattering centers in the mixed solution of the terminal hydroxyl polybutadiene-terminated polyester diol, causing light to scatter when passing through the terminal hydroxyl polybutadiene-terminated polyester diol, thereby reducing the transparency of the terminal hydroxyl polybutadiene-terminated polyester diol finally prepared, and the presence of bubbles will also cause the terminal hydroxyl polybutadiene-terminated polyester diol to have holes or cracks. Therefore, in one embodiment, when the terminal hydroxyl polybutadiene and the terminal carboxyl polytetrahydrofuran ether are reacted, a vacuum operation is also required to effectively remove the bubbles, thereby reducing the interference of the bubbles, and then ensuring that the terminal hydroxyl polybutadiene-terminated polyester diol with high transparency and no holes or cracks is prepared.

[0071] In one of the embodiments, when no bubbles are generated in the reaction system of the hydroxyl-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether, it can be determined that the reaction of the hydroxyl-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether is completed, thereby ensuring that a hydroxyl-terminated polybutadiene-capped polyester diol with high transparency and no holes or cracks is prepared.

[0072] In a preferred embodiment, the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.7 mmol / g to 0.8 mmol / g, and the molecular weight is 1000 g / mol. Furthermore, the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.7 mmol / g.

[0073] In one embodiment, when the hydroxy-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether are reacted, a catalyst is also added, and the catalyst includes at least one of toluenesulfonic acid, phosphoric acid, sulfonic acid, sodium hydroxide, sodium ethoxylate and methyl sodium, and the amount of the catalyst used accounts for 0.1% to 2% of the total mass of the reaction system of the hydroxy-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether, so as to ensure that a small amount of catalyst is added to achieve a rapid and comprehensive catalytic effect on the hydroxy-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether, thereby quickly preparing a hydroxy-terminated polybutadiene-capped polyester diol with high transparency and no holes or cracks.

[0074] It is worth mentioning that in order to prepare a long-chain hydroxy-terminated polybutadiene-capped polyester diol, in the present disclosure, carboxyl-terminated polytetrahydrofuran ether and hydroxy-terminated polybutadiene are usually selected as the original framework of the reaction, so that the ends of the main chains of the carboxyl-terminated polytetrahydrofuran ether and the hydroxy-terminated polybutadiene undergo esterification reaction to ensure that the formed hydroxy-terminated polybutadiene-capped polyester diol can be introduced into the main chain of the acrylic compound, thereby ensuring that the main chain of the molecular structure of the polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure, thereby ensuring that the polybutadiene-modified acrylate has good high temperature resistance and low temperature resistance.

[0075] In one embodiment, the acrylic compound includes at least one of acrylic acid, methacrylic acid and carboxyl acrylate, so as to ensure that the terminal hydroxyl polybutadiene-capped polyester diol can undergo a capping esterification reaction with the acrylic compound, so as to prepare a polybutadiene-modified acrylate with suitable flexibility and hardness and high transparency, thereby ensuring that the prepared low-dispersant aluminum-plastic film UV ink has good compatibility, good hot and cold cycle, good uniformity, good fluidity and a stable system, which is conducive to forming a pattern prototype layer with exquisite and clear patterns without yellowing or cracking on the aluminum-plastic film, and also ensuring that the pattern prototype layer formed after the subsequent pre-curing operation has suitable adhesion to the aluminum-plastic film, so as to better meet the adsorption force of the suction cup, and also facilitate the operator to quickly, comprehensively and labor-savingly wipe off the erroneous pattern prototype layer.

[0076] In one embodiment, the temperature of the end-capping esterification reaction is 90°C to 120°C, and the time of the end-capping esterification reaction is 6h to 12h; in particular, the mass ratio of the terminal hydroxyl polybutadiene end-capped polyester diol to the acrylic compound is (15-20):1, so as to ensure that the terminal hydroxyl polybutadiene end-capped polyester diol and the acrylic compound can just fully react to generate a polybutadiene-modified acrylate with good transparency.

[0077] Similarly, in one of the embodiments, when the end-hydroxyl polybutadiene-capped polyester diol can undergo an end-capping esterification reaction with an acrylic compound, a vacuum operation is also required to effectively remove bubbles, thereby reducing the interference of bubbles, and further ensuring that a polybutadiene-modified acrylate with high transparency, no holes, and no cracks is prepared, so as to facilitate the preparation of a uniform, stable, and highly transparent low-dispersant aluminum-plastic film UV ink, which is not only conducive to forming a pattern prototype layer with exquisite, clear, no yellowing, and no cracks on the aluminum-plastic film, but also ensures that during the subsequent pre-curing operation, light can better penetrate the bottom of the pattern information layer, so as to ensure that the pattern information layer can be quickly cured using less light radiation energy, while also ensuring that the formed pattern prototype layer has a more suitable adhesion to the aluminum-plastic film, and also reduces the problem of nozzle clogging during the printing process.

[0078] Similarly, in one of the embodiments, a catalyst is required to be added during the end-esterification reaction of the hydroxy-terminated polybutadiene-capped polyester diol and the acrylic compound. The catalyst includes at least one of benzenesulfonic acid, phosphoric acid, sulfonic acid, sodium hydroxide, sodium ethoxylate and sodium methyl. The amount of the catalyst used accounts for 0.1% to 2% of the total mass of the reaction system of the hydroxy-terminated polybutadiene-capped polyester diol and the acrylic compound, so as to ensure that a small amount of catalyst is added to achieve a rapid and comprehensive catalytic effect on the hydroxy-terminated polybutadiene-capped polyester diol and the acrylic compound, thereby quickly preparing a polybutadiene-modified acrylate with high transparency and no holes or cracks.

[0079] In one embodiment, when the acid value of the reaction system of the hydroxyl-terminated polybutadiene-capped polyester diol and the acrylic compound is 0, it is determined that the reaction of the hydroxyl-terminated polybutadiene-capped polyester diol and the acrylic compound is completed.

[0080] In some of the embodiments, the carboxyl acrylate is a long-chain carboxyl acrylate, and the preparation of the long-chain carboxyl acrylate includes the following specific steps: preparing the long-chain carboxyl acrylate by ring-opening reaction of a hydroxyl-functionalized acrylate and anhydride, wherein the mass ratio of the hydroxyl-functionalized acrylate to the anhydride is 1:1, the reaction temperature is 90°C to 120°C, the reaction time is 2h to 4h, and the long-chain carboxyl acrylate is prepared until the acid value is stable.

[0081] In one embodiment, the hydroxyl-functionalized acrylate includes at least one of hydroxy acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, and hydroxypropyl methacrylate.

[0082] In a preferred embodiment, the hydroxy acrylate is a high-functional hydroxy acrylate, wherein one end of the high-functional hydroxy acrylate contains at least one vinyl group and the other end of the high-functional hydroxy acrylate contains a hydroxyl group.

[0083] It can be understood that if the number of vinyl groups in the high-functional hydroxy acrylate is less than 2, the cross-linking density of the polybutadiene-modified acrylate is too low, resulting in a loose structure of the pattern prototype layer after the pre-curing operation, which weakens the adhesion between the pattern prototype layer and the aluminum-plastic film, thereby causing the pattern prototype layer to be unable to meet the adsorption force of the suction cup. In addition, if the number of vinyl groups is less than 2, it will also lead to the problem of reduced compatibility of the polybutadiene-modified acrylate itself; if the number of vinyl groups in the high-functional hydroxy acrylate is greater than 4, the cross-linking density of the polybutadiene-modified acrylate will be too high, resulting in excessive adhesion of the pattern prototype layer after the pre-curing operation, which will increase the difficulty of the operator's rework. Therefore, in the present disclosure, the number of vinyl groups contained in the high-functional hydroxy acrylate is 2 to 4, so as to ensure that the number of vinyl groups in the prepared polybutadiene-modified acrylate is more appropriate, which not only improves the compatibility of the polybutadiene-modified acrylate, so as to ensure that the prepared low-dispersant aluminum-plastic film UV ink has good compatibility, good hot and cold cycles, good uniformity, good fluidity and a stable system, but also is conducive to forming a pattern prototype layer with exquisite and clear patterns and no yellowing and cracking on the aluminum-plastic film, and ensures that the adhesion between the pattern prototype layer formed after the subsequent pre-curing operation and the aluminum-plastic film is more appropriate, so as to better meet the adsorption force of the suction cup, and also facilitates the operator to quickly, comprehensively and labor-savingly wipe off the erroneous pattern prototype layer without scratches.

[0084] In one embodiment, the high-functional hydroxy acrylate includes at least one of pentaerythritol triacrylate and dipentaerythritol pentaacrylate, so as to ensure that the number of vinyl groups contained in the high-functional hydroxy acrylate is 2 to 4, thereby ensuring that the number of vinyl groups in the prepared polybutadiene-modified acrylate is more appropriate. In addition, pentaerythritol triacrylate and dipentaerythritol pentaacrylate are both transparent liquids, so as to ensure that the prepared polybutadiene-modified acrylate has high transparency and good reaction activity.

[0085] In a preferred embodiment, the acid anhydride is methylhexahydrophthalic anhydride. Since methylhexahydrophthalic anhydride is a colorless transparent liquid, it is beneficial for preparing a colorless, highly transparent, and highly reactive polybutadiene-modified acrylate.

[0086] In one embodiment, the acrylic acid ester monomer includes at least one of 4-acryloylmorpholine, ethyl acrylate, butyl acrylate, hydroxypropyl acrylate and methyl methacrylate.

[0087] It can be understood that since 4-acryloylmorpholine, ethyl acrylate, butyl acrylate, hydroxypropyl acrylate and methyl methacrylate are all colorless and transparent liquids, it is beneficial to prepare a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system, and the added 4-acryloylmorpholine, ethyl acrylate, butyl acrylate, hydroxypropyl acrylate and methyl methacrylate can better adjust the fluidity of the low-dispersant aluminum-plastic film UV ink, and also improve the curing speed of the low-dispersant aluminum-plastic film UV ink, and also improve the adhesion of the low-dispersant aluminum-plastic film UV ink to the aluminum-plastic film, so as to ensure that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable.

[0088] It can be understood that although the compatibility between polybutadiene-modified acrylate and acrylate monomers, photoinitiators, pigments and leveling agents can be effectively improved by introducing a large amount of polybutadiene into the main chain of acrylic acid, when the leveling agent is an organosilicon leveling agent, the siloxane in the organosilicon leveling agent will further reduce the compatibility of the components of the low-dispersant aluminum-plastic film UV ink, resulting in the failure to prepare a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycles, good uniformity, good fluidity and stable system. Therefore, in a preferred embodiment, the acrylate monomer is a mixture of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate.

[0089] It can be understood that since the added 4-acryloylmorpholine can improve the compatibility between the silicone leveling agent and the polybutadiene-modified acrylate, photoinitiator, pigment and leveling agent in the low-dispersant aluminum-plastic film UV ink, and 4-acryloylmorpholine has certain similarities with ethyl acrylate and methyl methacrylate in chemical structure, 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate can be dissolved and mixed with each other, and the polybutadiene-modified acrylate, photoinitiator, pigment and leveling agent can be effectively prevented from agglomerating or settling, so as to ensure that the low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system is prepared.

[0090] It can also be understood that, since the acryloyl group of 4-acryloylmorpholine and the acrylic group in ethyl acrylate can be combined with the surface of the aluminum-plastic film through chemical bonds, the adhesion of the low-dispersant aluminum-plastic film UV ink to the aluminum-plastic film is further improved; since the addition of ethyl acrylate and methyl methacrylate can further reduce the viscosity of the low-dispersant aluminum-plastic film UV ink, the fluidity of the low-dispersant aluminum-plastic film UV ink is improved, so as to ensure that the low-dispersant aluminum-plastic film UV ink will not have the problem of nozzle clogging during the continuous production process.

[0091] It can also be understood that 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate all have the characteristics of fast curing speed, thereby ensuring that the low-dispersant aluminum-plastic film UV ink can quickly cure the pattern information layer using less light radiation energy, thereby improving the printing efficiency of the portable energy storage battery.

[0092] It is understandable that in actual production, in order to achieve rapid curing of the pattern information layer, the printing position is usually set relatively close to the light radiation position, but this will cause part of the excess light energy at the light radiation position to be radiated on the nozzle, causing the low-dispersant aluminum-plastic film UV ink at the nozzle to solidify and cause the nozzle to be blocked, especially when three low-dispersant aluminum-plastic film UV inks with fast curing speeds of acrylic ester monomers are used at the same time, the clogging problem of the low-dispersant aluminum-plastic film UV ink at the nozzle becomes more obvious. In order to solve the above problems, the applicant carefully studied the curing characteristics of different acrylic ester monomers and found that under the same light radiation conditions, the curing speed is ranked as follows: 4-acryloylmorpholine>ethyl acrylate>methyl methacrylate. Therefore, in the present disclosure, by controlling the mass ratio of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate to be 2:2:1, the curing speeds of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate are effectively coordinated, so as to ensure that the low-dispersant aluminum-plastic film UV ink can meet the faster curing speed while avoiding the problem of nozzle clogging due to the nozzle being close to the light radiation position.

[0093] It can also be understood that if the amount of 4-acryloylmorpholine used is too much, the too fast curing speed will cause the nozzle to be blocked; if the amount of ethyl acrylate used is too much, on the one hand, the too fast curing speed will cause the nozzle to be blocked; on the other hand, it will cause the amount of 4-acryloylmorpholine used to be reduced, resulting in poor dispersibility of the low-dispersant aluminum-plastic film UV ink, so that it is impossible to ensure that the low-dispersant aluminum-plastic film UV ink with good compatibility, good hot and cold cycle, good uniformity, good fluidity and stable system is prepared; if the amount of methyl methacrylate used is too much, the amount of 4-acryloylmorpholine and ethyl acrylate used will be reduced, and the higher printing efficiency requirements of portable energy storage batteries cannot be met. Therefore, in the present disclosure, by controlling the mass ratio of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate to be 2:2:1, it is ensured that 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate can play a good synergistic role. In this way, under the premise of ensuring high printing efficiency, the problem of nozzle clogging is avoided, and it is ensured that a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycles, good uniformity, good fluidity and stable system is prepared, so as to ensure that the adhesion between the pattern prototype layer formed after the subsequent pre-curing operation and the aluminum-plastic film is more appropriate, so as to better meet the adsorption force of the suction cup, and it is also convenient for the operator to quickly, comprehensively and labor-savingly wipe off the erroneous pattern prototype layer.

[0094] In one of the embodiments, the nozzle at the printing position has no intersection with the radiation area of ​​the light radiation, so as to ensure that the energy of the light radiation cannot reach the nozzle, thereby ensuring that the low-dispersant aluminum-plastic film UV ink at the nozzle will not solidify, thereby better avoiding the problem of nozzle clogging.

[0095] Furthermore, in one of the embodiments, the distance between the nozzle at the printing position and the power source of the light radiation is 15 cm to 20 cm, so as to ensure that the nozzle at the printing position has no intersection with the radiation area of ​​the light radiation.

[0096] In one embodiment, the photoinitiator includes at least one of phenylbis(2.4.6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenyl ketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone.

[0097] In one embodiment, the pigment includes at least one of carbon black, copper chrome black, titanium dioxide, phthalocyanine blue and lemon yellow to prepare a low-dispersant aluminum-plastic film UV ink with a desired color.

[0098] In one embodiment, the leveling agent includes at least one of a silicone leveling agent and an acrylic leveling agent, so that the addition of the silicone leveling agent and the acrylic leveling agent helps to improve the leveling performance of the low-dispersant aluminum-plastic film UV ink on the aluminum-plastic film, thereby avoiding pinholes, shrinkage holes, sagging and other undesirable phenomena in the pattern information layer obtained after printing.

[0099] It is understandable that in the subsequent automatic inspection process of the visual inspection device, a suction cup is usually required to grab the pre-cured pattern prototype layer of the portable energy storage battery for visual inspection. If the surface tension of the pattern prototype layer is too large, it will be difficult for the suction cup to separate from the pattern prototype layer, resulting in the adsorbed pattern prototype layer being prone to adhesion during the separation process. Therefore, in one embodiment, the leveling agent is an organic silicone leveling agent, so that the added organic silicone leveling agent can significantly reduce the surface tension of the low dispersant aluminum-plastic film UV ink, and after the pre-curing operation, the organic silicone polymer of the organic silicone leveling agent can quickly migrate to the surface of the low dispersant aluminum-plastic film UV ink to form a thin and uniform monomolecular layer with low surface energy, and this monomolecular layer has excellent smoothness and wear resistance. On the one hand, it is convenient to separate the suction cup from the pattern prototype layer, and effectively avoid the problem of adhesion of the adsorbed pattern prototype layer during the separation process. On the other hand, the pattern solidified layer after deep curing is not easy to wear and fall off when subjected to external force friction during the assembly process, that is, the wear resistance of the pattern solidified layer is improved; on the other hand, the organic silicone leveling agent can further improve the hot and cold cycle performance of the portable energy storage battery, that is, the high temperature resistance and low temperature resistance.

[0100] It can also be understood that, compared with acrylic leveling agents, acrylic leveling agents are worse than silicone leveling agents in reducing the surface tension of low-dispersant aluminum-plastic film UV inks, mainly because acrylic leveling agents cannot form a thin and uniform low-surface-energy monomolecular layer on the surface of the dispersant aluminum-plastic film UV ink after the pre-curing operation. This leads to the problem of adhesion between the suction cup and the pattern prototype layer when the aluminum-plastic film UV ink using acrylic leveling agents as dispersants is used, that is, it is not conducive to the detachment of the suction cup. The use of silicone leveling agents can effectively solve the problem of adhesion between the pattern prototype layer and the suction cup caused by acrylic leveling agents, mainly because after the pre-curing operation of the silicone leveling agent, a thin and uniform low-surface-energy monomolecular layer will be formed on the surface of the pattern prototype layer, and the monomolecular layer is conducive to the detachment of the pattern prototype layer from the suction cup.

[0101] It should be noted that, in general UV inks, the usage of silicone leveling agent is usually relatively low, as shown in Chinese patent document No. CN 117511295 A; that is, the usage of leveling agent is 0.3% to 0.7%; if a traditional low-usage silicone leveling agent is used, although a monomolecular layer with low surface energy can be formed on the surface of the pattern prototype layer after the pre-curing operation, the low surface energy of the monomolecular layer is relatively weak due to the relatively low usage of the silicone leveling agent.

[0102] Therefore, in the present disclosure, by increasing the usage amount of the silicone leveling agent to 1 part to 5 parts of the leveling agent, the usage amount of the silicone leveling agent in the present disclosure is higher than the usage amount of the traditional leveling agent, so as to ensure that a thin and uniform monomolecular layer with low surface energy is formed after the pre-curing operation, which is beneficial to the separation of the pattern prototype layer and the suction cup, and effectively avoids the problem of adhesion between the pattern prototype layer and the suction cup during the separation process.

[0103] However, due to the increase in the amount of silicone leveling agent used, the siloxane in the low-dispersant aluminum-plastic film UV ink will further reduce the compatibility of the various components of the low-dispersant aluminum-plastic film UV ink, resulting in the compatibility of the various components of the low-dispersant aluminum-plastic film UV ink being improved by only using less dispersant cannot be well met. Therefore, in the present disclosure, by further optimizing the type and amount of acrylate monomers, that is, when the acrylate monomer is a mixture of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate, the added 4-acryloylmorpholine can further improve the compatibility of the silicone leveling agent with the components of the low-dispersant aluminum-plastic film UV ink, thereby ensuring that the low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system can be prepared in conjunction with the use of acrylate monomers without increasing the amount of dispersant used, while also ensuring that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable and the low surface energy of the pattern prototype layer is more suitable, so as to meet the adsorption and detachment of the suction cup of the visual inspection device, and facilitate the operator to quickly, labor-savingly and comprehensively repair without scratches.

[0104] In a preferred embodiment, the mass fraction of the silicone leveling agent is 3 to 5 parts, so as to ensure that a smaller amount of the silicone leveling agent is used to form a thin and uniform monomolecular layer with low surface energy after the pre-curing operation. This not only effectively controls the preparation cost of the silicone leveling agent, but also better meets the requirement of separation of the pattern prototype layer and the suction cup without adhesion.

[0105] It is understandable that if the added organic silicone leveling agent has poor compatibility with the aluminum-plastic film UV ink due to excessively drastic reduction in surface tension, it is impossible to prepare a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycles, good uniformity, good fluidity and stable system. If the added organic silicone leveling agent has too little surface tension reduction, it is impossible to form a low surface energy monolayer. In other words, if the low surface energy surface of the formed low surface energy monolayer is low, the suction cup will not be able to adsorb the pre-cured pattern prototype layer. If the low surface energy surface of the formed low surface energy monolayer is high, it will be unfavorable for the suction cup to separate from the pre-cured pattern prototype layer.

[0106] Therefore, in one embodiment, the silicone leveling agent is a TEGO series silicone leveling agent. Since the surface tension reduction range of the TEGO series silicone leveling agent is more suitable to ensure that a thin and uniform monomolecular layer with low surface energy can be formed after the pre-curing operation, the low surface energy monomolecular layer can ensure that the pattern prototype layer and the suction cup are better separated, and at the same time, it can ensure that the suction cup can better adsorb the pre-cured pattern prototype layer, that is, the visual inspection device can automatically adsorb and detach the pattern prototype layer.

[0107] In some preferred embodiments, the TEGO series silicone leveling agent includes at least one of TEGO 450, TEGO Glide 432, TEGO Flow 425, TEGO Glide 100 and TEGO 2100 to ensure that a thin and uniform monolayer with low surface energy can be formed after the pre-curing operation.

[0108] In a more preferred embodiment, the TEGO series silicone leveling agent is a mixture of TEGO 450, TEGO Glide 432 and TEGO Glide 100.

[0109] It can be understood that, since TEGO 450 has high compatibility, good slip, anti-scratch performance, and anti-cratering effect, and TEGO Glide 432 has good slip, anti-scratch effect, high transparency, anti-adhesion and peeling effect, it is ensured that the added TEGO series has high transparency, which is more conducive to the formation of low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system; TEGO Glide 100 has high compatibility, excellent leveling, anti-cratering, improved transparency and good slip, thus ensuring that the added TEGO Glide 100 can better improve the transparency of low-dispersant aluminum-plastic film UV ink, which is conducive to the formation of low-dispersant aluminum-plastic film UV ink with good uniformity, good fluidity and stable system, making TEGO 450, TEGO Glide 432 and TEGO Glide When the three are compounded and used, it is ensured that a thin and uniform monomolecular layer with low surface energy can be formed after the pre-curing operation, and the low surface energy of the formed monomolecular layer is more suitable, so that the monomolecular layer with low surface energy can better meet the automatic adsorption operation and automatic separation operation of the visual detection device on the pattern prototype layer. In particular, when the polybutadiene-modified acrylate and the acrylate monomer are a mixture of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate, not only can a pattern prototype layer with exquisite and clear patterns be formed on the surface of the aluminum-plastic film, but also it is ensured that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable, so that the pattern prototype layer can better meet the adsorption force of the suction cup of the visual detection device, and it is ensured that a simple non-polar wiping liquid can be used to achieve rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, and the problem of nozzle clogging during printing is reduced.

[0110] In a more preferred embodiment, the mass ratio of TEGO 450, TEGO Glide 432 and TEGO Glide 100 is 3:1:1, ensuring that the added TEGO 450, TEGO Glide 432 and TEGO Glide 100 can form a thin and uniform monomolecular layer with a suitable low surface energy after pre-curing, and also ensuring that the adhesion between the pattern prototype layer and the aluminum-plastic film after the pre-curing operation is suitable, which is not only conducive to the adsorption and detachment of the suction cup, but also conducive to the operator to quickly, comprehensively and labor-savingly wipe off the erroneous pattern prototype layer without scratches.

[0111] In one embodiment, the dispersant includes at least one of SOLSPERSE 39000 and EFKA PX 4301 to ensure that a uniform and stable low-dispersant aluminum-plastic film UV ink can be prepared using less dispersant, effectively reducing the amount of dispersant used, effectively avoiding the problem of traditional dispersants causing long stirring time due to large addition amounts to affect the preparation efficiency, and also reducing the preparation cost of low-dispersant aluminum-plastic film UV ink.

[0112] The present disclosure also provides a method for preparing low-dispersant aluminum-plastic film UV ink, comprising the following steps: mixing polybutadiene-modified acrylate, acrylate monomers, photoinitiators, pigments and leveling agents to obtain the low-dispersant aluminum-plastic film UV ink described in any of the above embodiments.

[0113] The method for preparing the low-dispersant aluminum-plastic film UV ink, because the polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure, improves the compatibility of the polybutadiene-modified acrylate with acrylate monomers, photoinitiators, pigments and leveling agents, so as to ensure that the low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycles, good uniformity, good fluidity and stable system can be prepared by simple mixing, and the preparation cost of the low-dispersant aluminum-plastic film UV ink is reduced.

[0114] In one embodiment, the mixing operation conditions are: stirring speed 1000r / d~1500r / d, time 10min~20min, so as to ensure the preparation of low-dispersant aluminum-plastic film UV ink with good compatibility, good hot and cold cycle, good uniformity, good fluidity and stable system.

[0115] The present disclosure also provides a method for spray-printing and reworkable aluminum-plastic film UV ink based on low dispersant, comprising the following steps: obtaining the aluminum-plastic film UV ink with low dispersant as described in any one of the above items; using the aluminum-plastic film UV ink with low dispersant to spray-print the aluminum-plastic film on the surface of a portable energy storage battery to form a pattern information layer on the aluminum-plastic film on the surface of the portable energy storage battery; performing a pre-curing operation on the pattern information layer to preliminarily shape the pattern information layer on the aluminum-plastic film to obtain a pattern prototype layer; automatically detecting the pattern prototype layer by a visual detection device; if the pattern prototype layer is consistent with the preset spray-printed pattern information, performing a next step of deep curing operation on the pattern prototype layer; if not, rework operation on the pattern prototype layer.

[0116] The above-mentioned low-dispersant-based aluminum-plastic film UV ink printing reworkable method, by automatically detecting the pattern prototype layer after the pre-curing operation, ensures that the portable energy storage battery has a high production efficiency while meeting the automatic rapid detection of the portable energy storage battery. It also ensures that the erroneous pattern prototype layer can be removed quickly, labor-savingly and completely without the use of special ink cleaning agents, and the use of non-polar wiping liquid can effectively reduce the damage to the nylon layer, so as to avoid damage to the nylon layer of the aluminum-plastic film.

[0117] See also Figure 1 In order to better understand the technical solution and beneficial effects of the present invention, the present invention is further described in detail in combination with specific embodiments below. An embodiment of a low dispersant-based aluminum-plastic film UV ink jet printing reworkable method is described.

[0118] S101, obtaining the low-dispersant aluminum-plastic film UV ink described in any one of the above items.

[0119] It can be understood that, first, the low-dispersant aluminum-plastic film UV ink is weighed for use; then, the polybutadiene-modified acrylate, acrylate monomer, photoinitiator, pigment and leveling agent are mixed to obtain the low-dispersant aluminum-plastic film UV ink with good compatibility, good hot and cold cycle, good uniformity, good fluidity and stable system, which not only has a simple preparation process but also a low preparation cost.

[0120] It can also be understood that due to the good compatibility and high transparency of polybutadiene-modified acrylate, polybutadiene-modified acrylate only needs to add a small amount of dispersant to prepare aluminum-plastic film UV ink with good uniformity, good fluidity and stable system and low dispersant, especially when it is combined with TEGO series silicone leveling agent and acrylate monomers such as a mixture of 4-acryloylmorpholine, ethyl acrylate and methyl methacrylate, while ensuring that the low surface energy of a thin and uniform monomolecular layer formed after pre-curing is more suitable, the low surface energy monomolecular layer can also meet the requirements of good separation of the pattern prototype layer from the suction cup, and also ensure that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable, so as to realize the automatic adsorption and automatic separation operation of the pattern prototype layer by the visual detection device; it also ensures that the use of a simple non-polar wiping liquid can achieve rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, and effectively reduces the damage to the nylon layer, so as to avoid the problem of damage to the nylon layer of the aluminum-plastic film.

[0121] S102, using the low-dispersant aluminum-plastic film UV ink to perform a spray printing operation on the aluminum-plastic film on the surface of the portable energy storage battery, so as to form a pattern information layer on the aluminum-plastic film on the surface of the portable energy storage battery.

[0122] It can be understood that the low-dispersant aluminum-plastic film UV ink prepared in step S101 has good compatibility, good hot and cold cycle, good uniformity, good fluidity and a stable system. On the one hand, it is conducive to forming a pattern information layer with exquisite and clear patterns on the surface of the aluminum-plastic film; on the other hand, the good fluidity is conducive to achieving continuous printing operations and effectively avoiding the problem of nozzle clogging.

[0123] It can also be understood that, since the low-dispersant aluminum-plastic film UV ink prepared in step S101 has good high temperature resistance and high humidity resistance, the low-dispersant aluminum-plastic film UV ink can be directly sprayed on the aluminum-plastic film on the surface of a portable energy storage battery at a temperature of 85°C and a humidity of 85%, and is particularly suitable for applications in some harsh production environments.

[0124] S103, pre-curing the pattern information layer to preliminarily shape the pattern information layer on the aluminum-plastic film to obtain a pattern prototype layer.

[0125] It is understandable that, as mentioned in the background technology, the current traditional rework process is carried out after complete deep curing, but the cross-linking strength of the aluminum-plastic film UV-LED inkjet printing ink after complete deep curing is extremely high, resulting in a large overall rework ability, that is, either a special ink cleaning agent is required, or the wiping force is large, resulting in scratches on the surface of the aluminum-plastic film. Therefore, in the present disclosure, the pattern prototype layer formed by the pre-curing operation is reworked, so that the interior of the pattern prototype layer formed by the pre-curing operation is not fully cross-linked, so that the operator can use a simple non-polar wiping liquid to quickly, labor-savingly and completely wipe the erroneous pattern prototype layer without scratches, making the rework operation simpler and faster.

[0126] S104, automatically inspecting the pattern prototype layer through a visual inspection device; if the pattern prototype layer is consistent with the preset printing pattern information, performing the next step of deep curing operation on the pattern prototype layer; if not, performing a repair operation on the pattern prototype layer.

[0127] It can be understood that in the actual automated production process, a visual inspection device is usually used to automatically inspect the pre-cured pattern prototype layer, so that the visual inspection device can quickly detect the erroneous pattern prototype layer to avoid the erroneous pattern prototype layer flowing into the deep curing stage and causing the rework cost to increase. This not only ensures the high productivity of portable energy storage batteries, but also reduces the difficulty and cost of rework.

[0128] It can also be understood that, since the portable energy storage battery has a certain weight, if a single suction cup is used for adsorption, there will be an unstable adsorption phenomenon. For this reason, in order to ensure that the suction cup can stably adsorb the portable energy storage battery, the number of suction cups is usually multiple, such as four or five. When four or five suction cups adsorb the portable energy storage battery at the same time, due to the large adsorption area of ​​multiple suction cups and the large arrangement area of ​​the pattern prototype layer, multiple suction cups will inevitably adsorb and contact the pattern prototype layer during the adsorption process. If the adhesion between the pattern prototype layer and the aluminum-plastic film is too low, the pattern prototype layer will easily fall off during the adsorption process of multiple suction cups; if the adhesion between the pattern prototype layer and the aluminum-plastic film is too high, it will cause the difficulty of rework to increase; if the low surface energy of the pattern prototype layer is too high, it will be unfavorable for the subsequent separation of multiple suction cups from the pattern prototype layer; if the low surface energy of the pattern prototype layer is too low, it will not be possible to achieve good adsorption of multiple suction cups on the portable energy storage battery. Therefore, in the present disclosure, by effectively optimizing the polybutadiene-modified acrylate, the dosage of the silicone leveling agent is also optimized, so that the polybutadiene-modified acrylate and 1 to 5 parts of the TEGO series silicone leveling agent can not only form a pattern prototype layer with exquisite and clear patterns on the surface of the aluminum-plastic film, but also ensure that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable, so as to ensure that the pattern prototype layer can well meet the adsorption force of the suction cup of the visual inspection device, and also ensure that the low surface energy of the surface of the pattern prototype layer is more suitable, so as to ensure that the pattern prototype layer can well meet the adsorption and detachment operations of the suction cup of the visual inspection device; it also ensures that a simple non-polar wiping liquid can be used to achieve rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, and reduces the problem of nozzle clogging during printing.

[0129] The above-mentioned low-dispersant-based aluminum-plastic film UV ink printing reworkable method, by automatically detecting the pattern prototype layer after the pre-curing operation, ensures that the portable energy storage battery has a high production efficiency while meeting the automatic rapid detection of the portable energy storage battery. It also ensures that the erroneous pattern prototype layer can be removed quickly, labor-savingly and completely without the use of special ink cleaning agents, and the use of non-polar wiping liquid can effectively reduce the damage to the nylon layer, so as to avoid damage to the nylon layer of the aluminum-plastic film.

[0130] It can be understood that, since the low dispersant UV ink has good uniformity, good fluidity and a stable system, and the polybutadiene-modified acrylate, acrylate monomer and silicone leveling agent in the low dispersant UV ink have high transparency, the uniformity and stability of the prepared low dispersant UV ink are ensured, so that light can better penetrate the bottom of the pattern information layer. Specifically, in one embodiment, the optical power of the pre-curing operation is 6W / cm 2 ~8W / cm2 The light power of the pre-curing operation is relatively low, thereby ensuring that the pattern information layer can be quickly cured using less light radiation energy, while also ensuring that the formed pattern prototype layer has a suitable adhesion to the aluminum-plastic film, so as to better meet the adsorption force of the suction cup, and also facilitate the operator to quickly, comprehensively and labor-savingly erase the erroneous pattern prototype layer without scratches.

[0131] It is also understood that if the optical power of the pre-curing operation is less than 6W / cm 2 , the adhesion between the pattern prototype layer and the aluminum-plastic film after the pre-curing operation is relatively weak, which leads to the problem that the pattern prototype layer is easily detached when the multiple suction cups adsorb the pattern prototype layer, and it is impossible to ensure that the surface of the pattern prototype layer can form a thin and uniform monomolecular layer with low surface energy; if the light power of the pre-curing operation is higher than 8W / cm 2 , the adhesion between the pattern prototype layer and the aluminum-plastic film after the pre-curing operation is relatively strong, which makes rework more difficult. Therefore, in the present disclosure, by controlling the optical power of the pre-curing operation to 6W / cm 2 ~8W / cm 2 To ensure that after the pre-curing operation, the adhesion between the pattern prototype layer and the aluminum-plastic film is more suitable, and the low surface energy of the monomolecular layer formed on the surface of the pattern prototype layer is more suitable, not only can a pattern prototype layer with exquisite and clear pattern be formed on the surface of the aluminum-plastic film, but also ensure that the adhesion between the pattern prototype layer formed after the pre-curing operation and the aluminum-plastic film is more suitable, to ensure that the pattern prototype layer can better meet the adsorption force of the suction cup of the visual inspection device, and also ensure that the low surface energy of the surface of the pattern prototype layer is more suitable, to ensure that the pattern prototype layer can better meet the adsorption and detachment operations of the suction cup of the visual inspection device; it also ensures that a simple non-polar wiping liquid can be used to achieve rapid, labor-saving and comprehensive removal of the erroneous pattern prototype layer without scratches, and reduces the problem of nozzle clogging during printing.

[0132] It can also be understood that since the actual printing position in production is relatively close to the light radiation position, compared with the traditional higher light power, the lower light power adopted in the present invention can better avoid the problem that part of the excess light energy at the light radiation position will be radiated on the nozzle and cause the low-dispersant aluminum-plastic film UV ink at the nozzle to solidify and cause the nozzle to become clogged, thereby effectively reducing the probability of nozzle clogging.

[0133] It is understandable that if the light power of deep curing is lower than 12W / cm 2 If the light power of deep curing is higher than 15W / cm 2 When the light power is too high, the pattern prototype layer may turn yellow or crack easily. Therefore, in one embodiment, the light power of the deep curing is 12W / cm2 ~15W / cm 2 To ensure that the light energy for deep curing is more appropriate, so as to ensure that the pattern prototype layer can be fully cross-linked and cured to form a pattern cured layer, and there will be no problem of yellowing or cracking of the pattern prototype layer due to excessive light energy. In addition, the deep curing operation does not need to be performed in steps, which is not only simple to operate, but also ensures that less light energy is used to meet the demand for cross-linking and curing of the pattern prototype layer.

[0134] In one embodiment, the pre-curing operation time is 0.1s to 3s, so as to achieve preliminary shaping of the pattern information layer, thereby ensuring that a pattern prototype layer with suitable adhesion is obtained; at the same time, the pre-curing operation time is 0.1s to 3s, so as to achieve complete curing of the pattern information layer, and ensure that the residual light of the pre-curing operation and the deep curing operation is relatively small, that is, to ensure that the nozzle at the printing position and the radiation area of ​​the light radiation do not intersect, thereby more effectively reducing the probability of nozzle clogging.

[0135] In one of the embodiments, when the pattern prototype layer is repaired, a non-polar wiping liquid is used to clean the pattern prototype layer, so as to quickly and labor-savingly remove the erroneous pattern prototype layer without scratching it.

[0136] It can be understood that, as the background technology involves Chinese patent document CN 117511295 A, please refer to its specific embodiment for details: wipe the printed content with a dust-free cloth dipped in a cleaning agent, and the traditional cleaning agent is generally a cleaning agent for special inks, which is not only complex in formula but also relatively expensive to purchase. Therefore, in the present disclosure, since the molecular structure of polybutadiene-modified acrylate contains a large amount of polybutadiene rubber structure, the non-polar wiping liquid can be physically adsorbed with the surface of the polybutadiene rubber, so that the solvent molecules of the non-polar wiping liquid penetrate into the tiny gaps on the surface of the polybutadiene rubber structure, thereby playing a good cleaning role, and the physical adsorption of the non-polar wiping liquid and the polybutadiene rubber is relatively mild, and the damage to the nylon layer is relatively less. In this way, without the need to use a cleaning agent for special inks, the erroneous pattern prototype layer can be quickly, labor-savingly and comprehensively removed without scratches.

[0137] It can also be understood that since the nylon layer of the aluminum-plastic film is polar, the use of a non-polar wiping liquid can effectively reduce the damage to the nylon layer, thereby avoiding the problem of damage to the nylon layer of the aluminum-plastic film.

[0138] In one embodiment, the non-polar wiping liquid includes at least one of petroleum alkanes, cyclopentane, cyclohexane, n-hexane, pentane, dichloromethane, trichloroethylene, carbon tetrachloride, carbon disulfide and ethyl acetate, so as to ensure that the operator can quickly, labor-savingly and comprehensively wipe clean the erroneous pattern prototype layer without scratches during the rework of the present invention without the need for a special ink cleaning agent, and also reduce the cost of rework.

[0139] In one embodiment, the cleaning operation includes the following specific steps: the operator dips petroleum alkane into a dust-free cloth, and then wipes the dust-free cloth dipped in petroleum alkane back and forth along the pattern prototype layer 1 to 3 times, thereby effectively removing the erroneous pattern prototype layer. In a preferred embodiment, the wiping back and forth is performed once.

[0140] In one of the embodiments, the process of automatically inspecting the pattern prototype layer by a visual inspection device includes the following specific steps: first, multiple suction cups of the visual inspection device automatically absorb the pattern prototype layer to place the portable energy storage battery in the visual photography area, then multiple suction cups automatically detach from the pattern prototype layer, start the photography component to obtain the actual printing information of the pattern prototype layer, and then the control module of the visual inspection device compares the actual printing information with the preset printing pattern information. If the actual printing information is consistent with the preset printing pattern information, the multiple suction cups move the portable energy storage battery to the deep curing station for deep curing operation, otherwise the pattern prototype layer is repaired. In the present disclosure, the principle and structure of the visual inspection device belong to the prior art, and therefore, are not described in detail in the present disclosure.

[0141] In one embodiment, the adsorption force of the multiple suction cups is -20kPa to -60kPa, so as to achieve reliable and smooth movement of the adsorbed pattern prototype layer, and ensure that the multiple suction cups will not cause the pattern prototype layer itself to rupture or the adsorbed pattern prototype layer to fall off from the aluminum-plastic film during the process of adsorbing the pattern prototype layer.

[0142] Some specific examples are listed below, and if % is mentioned, it means percentage by weight. It should be noted that the following examples do not exhaust all possible situations, and the materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0143] Table 1 Recipe

[0144]

[0145] Wherein, the polybutadiene modified acrylate is prepared by the following method:

[0146] 1) subjecting polytetrahydrofuran ether diol having a molecular weight of 1000 g / mol and methyl hexahydrophthalic anhydride to a ring-opening reaction at a mass ratio of 1:1 for 2 hours at a ring-opening temperature of 120° C. until the acid value of the reaction of polytetrahydrofuran ether diol and methyl hexahydrophthalic anhydride is stable to obtain carboxyl-terminated polytetrahydrofuran ether;

[0147] 2) esterifying a hydroxyl-terminated polybutadiene having a molecular weight of 2000 g / mol and a hydroxyl value of 0.7 mmol / g with a carboxyl-terminated polytetrahydrofuran ether in a mass ratio of 2:1 for 8 hours at a temperature of 100° C., adding 0.1% toluenesulfonic acid based on the total mass of the esterification reaction system, and simultaneously performing a vacuum operation until no bubbles are generated in the esterification reaction system, thereby completing the reaction and obtaining a hydroxyl-terminated polybutadiene-capped polyester diol;

[0148] 3) The end-hydroxyl polybutadiene-terminated polyester diol and the acrylic compound are subjected to an end-esterification reaction at a mass ratio of 15:1 for 8 hours, the end-esterification temperature is 120°C, and 0.5% of toluenesulfonic acid of the total mass of the esterification reaction system is added, and vacuum operation is performed at the same time, until the acid value in the esterification reaction system is 0, and the reaction is terminated to obtain the polybutadiene modified acrylate, wherein the acrylic compound is a long-chain carboxyl acrylate, and the long-chain carboxyl acrylate is prepared by the following method: pentaerythritol triacrylate and methyl hexahydrophthalic anhydride are reacted at a mass ratio of 1:1 at a temperature of 90°C for 3 hours until the acid value is stable to obtain the long-chain carboxyl acrylate.

[0149] Comparative Example 6

[0150] The difference from Example 1 is that the polybutadiene modified acrylate in Example 1 is replaced by polyurethane modified acrylate resin, and the rest remains unchanged.

[0151] Comparative Example 7

[0152] The difference from Example 1 is that the polybutadiene modified acrylate in Example 1 is replaced by polybutadiene acrylic epoxy resin, and the rest remains unchanged.

[0153] The aluminum-plastic film with low dispersant in any one of the above Examples 1 to 3 and Comparative Examples 1 to 7 is UV-coated

[0154] The ink is used in a printing reworkable method, which includes the following steps:

[0155] S101, obtaining low dispersant aluminum-plastic film UV ink; preparing materials according to the formula in Table 1 above, and then stirring at a speed of 1000 r / d for 10 min to prepare low dispersant aluminum-plastic film UV inks of Examples 1 to 3 and Comparative Examples 1 to 7;

[0156] S102, using low-dispersant aluminum-plastic film UV ink to perform a spray printing operation on the aluminum-plastic film on the surface of the portable energy storage battery to form a pattern information layer on the aluminum-plastic film on the surface of the portable energy storage battery;

[0157] S103, pre-curing the pattern information layer to preliminarily shape the pattern information layer on the aluminum-plastic film to obtain a pattern prototype layer, wherein the optical power of the pre-curing operation is 6W / cm 2 , time is 0.5s; the distance between the nozzle and the power source of light radiation is 15cm;

[0158] S104, the four suction cups of the visual inspection device automatically adsorb the pattern prototype layer, and the adsorption force of each suction cup is -50kpa, so as to place the portable energy storage battery in the visual photography area, and then the multiple suction cups automatically detach from the pattern prototype layer, start the photography component to obtain the actual printing information of the pattern prototype layer, and then the control module of the visual inspection device compares the actual printing information with the preset printing pattern information. If the actual printing information is consistent with the preset printing pattern information, the multiple suction cups move the portable energy storage battery to the deep curing station for deep curing operation to form a pattern curing layer; wherein the light power of deep curing is 15W / cm 2 , time is 1s;

[0159] If not, the operator dips a dust-free cloth into a non-polar wiping liquid, and then wipes the dust-free cloth dipped in the non-polar wiping liquid back and forth along the pattern prototype layer once to complete the repair operation on the erroneous pattern prototype layer.

[0160] Comparative Example 8

[0161] The difference from Example 1 is that the optical power of the pre-curing operation in step S103 of Comparative Example 8 is 5 W / cm 2 , time is 0.5s; the rest remain unchanged.

[0162] Comparative Example 9

[0163] The difference from Example 1 is that the optical power of the pre-curing operation in step S103 of Comparative Example 9 is 10 W / cm 2 , time is 0.5s; the rest remain unchanged.

[0164] Comparative Example 10

[0165] The difference from Example 1 is that the optical power of the deep curing operation in step S104 of Comparative Example 10 is 11 W / cm 2 , time is 1s; the rest remain unchanged.

[0166] Comparative Example 11

[0167] The difference from Example 1 is that the optical power of the deep curing operation in step S104 of Comparative Example 11 is 16 W / cm 2 , time is 1s; the rest remain unchanged.

[0168] The low dispersant aluminum-plastic film UV inks of the above Examples 1 to 3 and Comparative Examples 1 to 11 and the pattern prototype layer and pattern cured layer of the portable energy storage battery were subjected to performance tests, respectively, to obtain the experimental data in Table 2 below:

[0169] Appearance: visual inspection;

[0170] The situation of multiple suction cups adsorbing the pattern prototype layer: record according to the actual production situation;

[0171] Adhesion: 3M-600 tape, number of pull tests at the same location;

[0172] Hot and cold cycle times: temperature upper and lower limits: -40℃ to 55℃, keep at the limit temperature for 30 minutes, and test at a heating and cooling rate of 5℃ / min;

[0173] Alcohol resistance: load 150g, friction head with a dust-free cloth with 95% alcohol solution for testing;

[0174] Wear resistance: tested with a load of 500g and a rubber friction head.

[0175] Table 2

[0176]

[0177]

[0178]

[0179]

[0180] From the data in Table 2 above, it can be seen that when Examples 1 to 3 use polybutadiene-modified acrylate, 4-acryloylmorpholine, ethyl acrylate, methyl methacrylate, TEGO series leveling agent, photoinitiator and pigment for compounding, a small amount of dispersant can be added to prepare a low-dispersant aluminum-plastic film UV ink with good compatibility, good cold and hot cycle, good uniformity, good fluidity and stable system. At the same time, with the use of pre-curing operation and non-polar wiping liquid, not only can a patterned and clear patterned prototype layer with no yellowing and cracking be formed on the surface of the aluminum-plastic film, but also the patterned prototype layer formed after the pre-curing operation is ensured to have a more suitable adhesion to the aluminum-plastic film, so as to ensure that the patterned prototype layer can better meet the automatic adsorption and automatic separation of the sucker of the visual detection device, and also ensure that a simple non-polar wiping liquid can be used to achieve rapid, labor-saving and comprehensive removal of the wrong patterned prototype layer, and there is no scratch, and the problem of nozzle clogging during the printing process is reduced. Among them, the comprehensive indicators of Example 1 are the best.

[0181] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A low dispersant aluminum-plastic film UV ink, characterized in that: Includes the following mass components:

2. The low dispersant aluminum-plastic film UV ink according to claim 1, characterized in that: The preparation of the polybutadiene modified acrylate comprises the following steps: Carboxyl-terminated polytetrahydrofuran ether is obtained by subjecting polytetrahydrofuran ether diol and acid anhydride to a ring-opening reaction; Esterifying the hydroxy-terminated polybutadiene and the carboxyl-terminated polytetrahydrofuran ether to obtain the hydroxy-terminated polybutadiene-capped polyester diol; The terminal hydroxyl polybutadiene-capped polyester diol is subjected to a capping esterification reaction with an acrylic compound to obtain the polybutadiene-modified acrylate.

3. The low dispersant aluminum-plastic film UV ink according to claim 2, characterized in that: The molecular weight of the polytetramethylene glycol is 800 g / mol to 2000 g / mol; and / or, The acid anhydride comprises at least one of methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride and maleic anhydride; and / or, The temperature of the ring-opening reaction is 90° C. to 120° C.; the time of the ring-opening reaction is 2 h to 4 h; and / or, The mass ratio of the polytetrahydrofuran ether diol to the acid anhydride is 1:1; and / or, The molecular weight of the hydroxyl-terminated polybutadiene is 1000 g / mol to 2000 g / mol, and the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.5 mmol / g to 1.0 mmol / g; and / or, The mass ratio of the terminal hydroxyl polybutadiene to the terminal carboxyl polytetrahydrofuran ether is (2-3):1; and / or, The temperature of the esterification reaction is 90°C to 120°C; the time of the esterification reaction is 6h to 12h; and / or, The acrylic compound includes at least one of acrylic acid, methacrylic acid and carboxylic acrylate; and / or, The temperature of the end-capping esterification reaction is 90° C. to 120° C., and the time of the end-capping esterification reaction is 6 h to 12 h; and / or, The mass ratio of the terminal hydroxyl polybutadiene-capped polyester diol to the acrylic compound is (15-20):

1.

4. The low dispersant aluminum-plastic film UV ink according to claim 1, characterized in that: The acrylic acid ester monomer includes at least one of 4-acryloylmorpholine, ethyl acrylate, butyl acrylate, hydroxypropyl acrylate and methyl methacrylate; and / or, The dispersant includes at least one of SOLSPERSE 39000 and EFKA PX 4301.

5. The low dispersant aluminum-plastic film UV ink according to claim 1, characterized in that: The photoinitiator includes at least one of phenylbis(2.4.6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenylketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone.

6. The low dispersant aluminum-plastic film UV ink according to claim 1, characterized in that: The pigment includes at least one of carbon black, copper chrome black, titanium dioxide, phthalocyanine blue and lemon yellow.

7. The low dispersant aluminum-plastic film UV ink according to claim 1, characterized in that: The leveling agent includes at least one of an organic silicon leveling agent and an acrylic leveling agent.

8. A method for preparing low-dispersant aluminum-plastic film UV ink, characterized in that: The method comprises the following steps: mixing polybutadiene modified acrylate, acrylate monomer, photoinitiator, pigment and leveling agent to obtain the low dispersant aluminum-plastic film UV ink according to any one of claims 1 to 7.

9. A method for repairing aluminum-plastic film by UV ink jet printing based on low dispersant, characterized in that: The steps include: Obtain the low-dispersant aluminum-plastic film UV ink according to any one of claims 1 to 8; The low-dispersant aluminum-plastic film UV ink is used to perform a spray printing operation on the aluminum-plastic film on the surface of the portable energy storage battery to form a pattern information layer on the aluminum-plastic film on the surface of the portable energy storage battery; Pre-curing the pattern information layer to preliminarily shape the pattern information layer on the aluminum-plastic film to obtain a pattern prototype layer; Automatically inspecting the pattern prototype layer by a visual inspection device; If the pattern prototype layer is consistent with the preset printing pattern information, the next step of deep curing operation is performed on the pattern prototype layer; if not, the pattern prototype layer is repaired.

10. The low dispersant-based aluminum-plastic film UV ink jet printing reworkable method according to claim 9, characterized in that: The optical power of the pre-curing operation is 6W / cm 2 ~8W / cm 2 and / or, The optical power of the deep curing is 12W / cm 2 ~15W / cm 2 .

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