Acid-water-resistant and erasable marking pen special for battery

Abstract

The invention relates to the technical field of industrial marking tools, and discloses an acid-water-resistant and erasable marking pen special for a battery. The pen body comprises a sealing structure, a pen point and an ink storage core for storing ink; the ink is prepared from modified acrylic resin, alcohol-soluble polyamide resin, organic silicon resin, a silane coupling agent, acid-resistant dye, an auxiliary coloring agent, industrial alcohol, isopropanol, methylbenzene, citric acid, borax, a nonionic surfactant and an antioxidant according to a specific proportion. By optimizing the ink formula and simplifying the pen body structure, the stable writing function in acidic and humid environments is achieved, meanwhile, it is ensured that marks can be completely erased through common industrial alcohol without leaving traces, and the ink is low in cost, easy to manufacture and convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial marking tools, in particular to a special acid-resistant and water-erasable marker for batteries. BACKGROUND

[0002] Lead-acid batteries are widely used energy storage devices. During production, it is often necessary to mark the battery shell to identify batch number, model, production date and quality inspection information. These markings are of great significance for production traceability, quality control and product management.

[0003] Currently, the actual problems faced by lead-acid battery production workshops are:

[0004] 1. Acidic environment interference: There is a common presence of sulfuric acid solution and acidic environment in the workshop, with a pH value often between 2-3, which causes ordinary marking tools to fade quickly or completely unable to mark;

[0005] 2. Moist surface challenge: The battery shell on the production line often has moisture or acid, making it difficult or impossible to attach markings;

[0006] 3. Post-removal needs: Temporary markings need to be completely removed before quality inspection, packaging or delivery, and existing markings often leave marks, affecting product appearance;

[0007] 4. Cost-effectiveness issues: Existing solutions such as special labels and laser marking equipment have high investment costs and are not suitable for small and medium-sized production enterprises.

[0008] To solve the above problems, the existing solutions and the defects of the solutions are as follows:

[0009] 1. Ordinary paint pen: uses organic solvent-based ink, which works well on dry surfaces, but quickly fails in acidic environments and is difficult to remove;

[0010] 2. Marker pen: has very poor stability in acidic environments and leaves obvious marks when removed;

[0011] 3. Erasable pen: most rely on heat-sensitive materials, which have poor stability under fluctuating production environment temperatures;

[0012] 4. Labeling: high cost, cumbersome operation, and reduced adhesion in acidic environments leading to the risk of falling off.

[0013] Due to the difficulty of existing marking technology to simultaneously meet the requirements of acid resistance, moisture resistance and erasability, and cost-effectiveness, we need to propose an acid-resistant and water-erasable marker for batteries. SUMMARY

[0014] The acid-resistant and water-erasable battery special marker pen of the present application realizes stable writing function in acid and humid environment, ensures that the marker can be completely erased without trace by ordinary industrial alcohol, and has low cost, simple manufacturing and convenient use.

[0015] To achieve the above object, the present application provides the following technical solution: an acid-resistant and water-erasable battery special marker pen, comprising:

[0016] ink;

[0017] a pen body comprising a sealing structure, a pen tip and an ink storage core for storing ink, the sealing structure comprising a shell, a screw-pressed inner cover and a sealing ring, the pen tip being conical with a diameter of 0.8-1.2 mm, the ink storage core being a single-layer polyester fiber ink storage core with a diameter of 8-10 mm, a length of 50-60 mm and an ink capacity of 3-5 ml;

[0018] by mass percentage, the components of the ink include 50-60% of a base resin carrier, 8-12% of a hydrophobic additive, 12-15% of a coloring solution, 20-25% of a solvent and 3-5% of an additive;

[0019] the base resin carrier includes 35-40% of a modified acrylic resin and 15-20% of an alcohol-soluble polyamide resin, the hydrophobic additive includes 5-8% of an organic silicon resin and 3-4% of a silane coupling agent, the coloring solution includes 8-10% of an acid-resistant dye and 4-5% of an auxiliary colorant, the solvent includes 10-12% of industrial alcohol, 8-10% of isopropyl alcohol and 2-3% of toluene, and the additive includes 1-2% of citric acid, 1-1.5% of borax, 0.5-1% of a non-ionic surfactant and 0.5% of an antioxidant.

[0020] Preferably, the modified acrylic resin is selected from a methyl methacrylate-acrylic acid copolymer, and the alcohol-soluble polyamide resin can replace high-cost polyurethane and provide good adhesion and flexibility.

[0021] Preferably, the organic silicon resin can replace high-cost carbon fluoride polymer and provide sufficient hydrophobic performance, and the silane coupling agent is selected from gamma-methacryloxypropyl trimethoxysilane.

[0022] Preferably, the acid-resistant dye is selected from phthalocyanine dyes stable in acid environment, and the auxiliary colorant is selected from acid-resistant azo dyes to enhance color stability.

[0023] Preferably, the industrial alcohol is used to replace high-cost special solvents, the isopropyl alcohol is used to increase the drying rate, and the toluene is used to improve the solubility of the ink.

[0024] Preferably, the citric acid is used as a low-cost pH buffer, the borax is used as an alkaline buffer to form a buffer system with the citric acid, the non-ionic surfactant is selected from polyethylene glycol ethers, and the antioxidant is selected from BHT.

[0025] Preferably, the ink storage core is dried after being immersed in a calcium carbonate solution to form an acidic buffer structure, the material of the pen tip is selected from 304 stainless steel, the surface of the pen tip is treated with silicone oil to provide hydrophobicity, a complex coating process is avoided, and a compression type structure is selected for the connection of the pen tip.

[0026] Preferably, the shell is selected from a PP plastic shell, the wall thickness of the shell is 1.2-1.5 mm to provide acid resistance of the shell, and the sealing ring is selected from a nitrile rubber sealing ring.

[0027] Preferably, the preparation method of the ink comprises:

[0028] S1, mixing solvents at room temperature;

[0029] S2, sequentially adding modified acrylic resin and alcohol-soluble polyamide resin to the solvents and stirring for 3-4 h until dissolution;

[0030] S3, adding a pre-mixed coloring solution to the resin solution;

[0031] S4, finally adding hydrophobic additives and additives and uniformly mixing for 1-2 h;

[0032] S5, filtering the ink through a 100-mesh sieve to remove impurities.

[0033] Preferably, the assembly of the pen body comprises:

[0034] A1, selecting a sealing structure of a standard injection molding part;

[0035] A2, installing the ink storage core inside the sealing structure and installing the pen tip at the end of the sealing structure;

[0036] A3, using a filling device to inject the prepared ink into the ink storage core;

[0037] A4, installing the sealing ring and using a cap screwing machine to install the inner cap;

[0038] A5, performing a sealing test and a writing test on the assembled marker pen.

[0039] Compared with the prior art, the present application has the following advantages:

[0040] 1、The application realizes stable writing function in acid and humid environment by optimizing ink formula and simplifying pen body structure, ensures that the mark can be completely erased without trace by ordinary industrial alcohol, and has low cost, simple manufacturing and convenient use. BRIEF DESCRIPTION OF DRAWINGS

[0041] Fig. 1 It is a structural schematic diagram of the application;

[0042] Fig. 2 It is a preparation flow chart of the ink of the application;

[0043] Fig. 3 It is an assembly flow chart of the pen body of the application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0045] Please refer to Figs. 1-3 The application provides a technical solution: an acid-resistant water-erasable special marker pen for battery, comprising:

[0046] Ink;

[0047] The components of the ink include, by mass percentage, 50-60% of base resin carrier, 8-12% of hydrophobic additive, 12-15% of coloring solution, 20-25% of solvent and 3-5% of additive.

[0048] The base resin carrier includes 35-40% of modified acrylic resin and 15-20% of alcohol-soluble polyamide resin, the modified acrylic resin is selected from methyl methacrylate-acrylic acid copolymer, and the alcohol-soluble polyamide resin can replace high-cost polyurethane and provide good adhesion and flexibility.

[0049] Compared with other high molecular resins, the modified acrylic resin has low cost and is easy to obtain, which helps to reduce the overall ink cost. It can form a uniform and smooth ink film on the surface of the battery, ensuring the clarity and durability of the mark. It has certain resistance to acid and humid environment, so that the mark is not easy to fade or fall off during the use and storage of the battery.

[0050] The alcohol-soluble polyamide resin provides good adhesion for the ink, so that the mark can be firmly attached to the surface of the battery and is not easy to be erased or worn, and it gives the ink film a certain flexibility to adapt to the slight deformation of the surface of the battery and prevent the ink film from cracking.

[0051] The hydrophobic additive includes 5-8% of silicone resin, 3-4% of silane coupling agent, the silicone resin can replace high-cost fluorocarbon polymer to provide sufficient hydrophobic performance, and the silane coupling agent is selected from γ-methacryloxypropyl trimethoxysilane.

[0052] The silicone resin provides sufficient hydrophobic performance, so that the ink can dry quickly after writing, reduces the blur or diffusion of the mark caused by moisture, and enhances the resistance of the ink film to water, so that the mark can remain clear even in a humid environment. The silane coupling agent forms a chemical bond between the resin and the surface of the battery, enhances the bonding force of the ink film to the surface of the battery, improves the durability of the mark, and helps to improve the uniform dispersion of the modified acrylic resin and alcohol-soluble polyamide resin in the solvent, and improves the stability and writing performance of the ink.

[0053] The colored solution includes 8-10% of acid-resistant dye and 4-5% of auxiliary colorant, the acid-resistant dye is selected from phthalocyanine dye stable in acidic environment, and the auxiliary colorant is selected from azo dye resistant to acid, to enhance the color stability.

[0054] The acid-resistant dye remains stable in an acidic environment, ensures that the mark does not fade due to acid erosion during battery use, provides bright and full color, and makes the mark clear and visible for easy identification; the auxiliary colorant cooperates with the acid-resistant dye to further improve the acid resistance and color stability of the coloring system, and by adjusting the amount of auxiliary colorant, the color of the mark can be adjusted to meet different use requirements.

[0055] The solvent includes 10-12% of industrial alcohol, 8-10% of isopropyl alcohol, and 2-3% of toluene, the industrial alcohol can replace high-cost special solvents, the isopropyl alcohol is used to increase the drying rate, and the toluene is used to improve the solubility of the ink, and the amount is controlled at a low level to reduce toxicity.

[0056] The industrial alcohol can dissolve various components in the basic resin carrier, the hydrophobic additive and the coloring system, form a uniform ink solution, and has good volatility, so that the ink can dry quickly after writing, improving the writing efficiency; the isopropyl alcohol is used in combination with ethanol to provide an appropriate drying rate, avoid the ink from drying too quickly to cause writing to be not smooth or drying too slowly to cause the mark to be blurred, enhance the solubility of the ink to some difficult-to-dissolve components, and improve the stability and writing performance of the ink. The toluene further improves the solubility of the components in the ink, ensuring the uniformity and stability of the ink. Since toluene is toxic, the amount of toluene should be controlled at a low level.

[0057] The additive comprises 1-2% of citric acid, 1-1.5% of borax, 0.5-1% of non-ionic surfactant, and 0.5% of antioxidant. The citric acid is used as a low-cost pH buffer, the borax acts as an alkaline buffer, forms a buffer system with the citric acid, the non-ionic surfactant is selected from polyethylene glycol ethers, replaces high-cost fluorosilicon surfactants, and the antioxidant is selected from BHT (dibutylhydroxytoluene) which is low in price and good in effect.

[0058] The citric acid is a low-cost pH buffer, adjusts the acidity and alkalinity of the ink, keeps the ink stable within a certain range, reduces the influence of acid-base changes on the performance of the ink, and inhibits the corrosion of the ink on the surface of the battery to a certain extent, thereby protecting the service life of the battery.

[0059] The borax forms a buffer system with the citric acid, jointly adjusts the pH value of the ink, improves the stability of the ink, helps to enhance the bonding force between the ink film and the surface of the battery, and makes the marking more firm.

[0060] The non-ionic surfactant can reduce the surface tension of the ink, so that the ink can better wet the surface of the battery, improve the smoothness of writing and the clarity of marking, replace high-priced fluorosilicon surfactants, and reduce the cost while ensuring the performance.

[0061] The antioxidant can prevent the components in the ink from being oxidized during storage and use, prolong the shelf life of the ink, and ensure that the color, adhesion, and drying performance of the ink remain stable for a long time.

[0062] The marking pen has the following cost advantages:

[0063] I. Material cost: replace imported special resin with domestic general resin, reduce cost by 50-60%, replace pigment with dye, reduce cost by 30-40%, and replace special solvent with ordinary solvent, reduce cost by 40-50%;

[0064] II. Production cost: simplify production process, reduce energy consumption, save production cost by 20-30%, use standard components to avoid customization fees, reduce mold investment, and use existing production line for modification with low initial investment;

[0065] III. Use cost: the retail price of a single marking pen is controlled within 15-25 yuan RMB, and the marking cost per meter is about 0.05-0.08 yuan, which is 50-60% lower than that of similar imported products.

[0066] The preparation method of the ink comprises the following steps:

[0067] S1. Mix the solvents at room temperature;

[0068] The required solvent is accurately weighed and mixed uniformly at room temperature without heating to reduce energy consumption and avoid solvent evaporation or decomposition.

[0069] S2. Add the modified acrylic resin and alcohol-soluble polyamide resin to the solvent in sequence and stir for 3-4 h until dissolved;

[0070] S3. Add the pre-mixed coloring solution to the resin solution; the coloring solution is added slowly while stirring to ensure uniform dispersion of the coloring solution.

[0071] S4. Finally, add the hydrophobic additive and the additive and mix uniformly for 1-2 h until a stable ink is formed;

[0072] S5. Filter the ink through a 100-mesh sieve to remove impurities.

[0073] The pen body includes a sealing structure, a pen tip, and an ink storage core for storing ink, the sealing structure includes a shell, a screw-on inner cover, and a sealing ring, the pen tip is conical with a diameter of 0.8-1.2 mm, the ink storage core is a single-layer polyester fiber ink storage core with a diameter of 8-10 mm, a length of 50-60 mm, and an ink capacity of 3-5 ml.

[0074] The ink storage core is dried after being immersed in a calcium carbonate solution to form an acidic buffer structure, the pen tip is made of 304 stainless steel, the surface of the pen tip is treated with silicone oil to provide hydrophobicity, avoiding complex coating processes, and the connection of the pen tip is selected as a compression type structure.

[0075] The shell is made of a PP plastic shell with a wall thickness of 1.2-1.5 mm to provide acid resistance, and the sealing ring is made of a butyl rubber sealing ring.

[0076] The assembly of the pen body includes:

[0077] A1. Select a standard injection molding part sealing structure;

[0078] A2. Install the ink storage core inside the sealing structure and install the pen tip at the end of the sealing structure;

[0079] A3. Use a filling device to inject the prepared ink into the ink storage core;

[0080] A4. Install the sealing ring and use a cap screwing machine to install the inner cover;

[0081] A5. Perform a sealing test and a writing test on the assembled marker. The sealing test can be performed by applying pressure to observe whether there is ink leakage; the writing test checks the smoothness and color uniformity of the ink by actual writing.

[0082] By optimizing the ink formula design, significantly reducing material costs while ensuring basic functions, simplifying the pen structure, reducing the number of components, improving manufacturing feasibility, optimizing performance for actual working environment (pH 2-4), avoiding overdesign, using ordinary industrial alcohol as an eraser, improving practicality, using easily available raw materials, and ensuring stable supply chain.

[0083] In summary, the marker pen with the above formula ink has the following stability mechanisms:

[0084] Acid resistance: The citric acid-borax buffer system in the ink can maintain the relative stability of the ink within the pH range of 2-4. The silicone resin forms an acid-resistant protective layer after drying. The calcium carbonate in the ink storage core can partially neutralize the penetrating acidic substances;

[0085] Water resistance: The modified acrylic resin and silicone resin form a semi-crosslinked structure, providing basic hydrophobicity. The silane coupling agent forms a chemical bond on the surface of the battery shell, enhancing adhesion. The optimized surfactant formula reduces the surface tension of the ink, allowing it to spread on wet surfaces;

[0086] Erasing: The resin system is designed to be highly sensitive to alcohol, and ordinary 75% industrial alcohol can effectively dissolve it. Dyes rather than pigments are chosen as colorants to ensure complete dissolution without leaving residues. Alcohol-soluble polyamide resin ensures that the resin network completely collapses under the action of alcohol.

[0087] The marker pen has the following technical effects:

[0088] 1. Stable writing in an acidic environment with a pH value of 2-4, meeting the needs of lead-acid battery production environment;

[0089] 2. Can form clear marks on slightly wet surfaces;

[0090] 3. The mark dries at room temperature within 90-120 seconds, suitable for ordinary production rhythm;

[0091] 4. The mark can remain without obvious fading for 1-2 months under normal conditions, meeting the general production cycle;

[0092] 5. Using 75% industrial alcohol can completely erase within 20-30 seconds without leaving obvious traces;

[0093] 6. The service life of a single marker pen can reach 300-500 meters of writing length;

[0094] 7. The manufacturing cost is only 30-40% of the same imported products;

[0095] 8. Using ordinary industrial raw materials, the supply chain is stable and reliable;

[0096] 9. Easy to operate, no special training is required;

[0097] 10. Storage period can reach 12 months, meeting the general industrial use requirements.

[0098] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A water-resistant, wipeable battery marking pen, characterized in that, include: ink; The pen body includes a sealing structure, a pen tip, and an ink reservoir for storing ink. The sealing structure includes an outer shell, a screw-on inner cap, and a sealing ring. The pen tip is tapered and has a diameter of 0.8-1.2 mm. The ink reservoir is a single-layer polyester fiber ink reservoir with a diameter of 8-10 mm, a length of 50-60 mm, and an ink capacity of 3-5 ml. The ink comprises, by weight percentage, 50-60% base resin carrier, 8-12% hydrophobic additive, 12-15% coloring solution, 20-25% solvent, and 3-5% additive. The base resin carrier comprises 35-40% modified acrylic resin and 15-20% alcohol-soluble polyamide resin; the hydrophobic additive comprises 5-8% silicone resin and 3-4% silane coupling agent; the coloring solution comprises 8-10% acid-resistant dye and 4-5% auxiliary colorant; the solvent comprises 10-12% industrial alcohol, 8-10% isopropanol, and 2-3% toluene; and the additive comprises 1-2% citric acid, 1-1.5% borax, 0.5-1% nonionic surfactant, and 0.5% antioxidant.

2. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The modified acrylic resin is selected from methyl methacrylate-acrylic acid copolymer. The use of the alcohol-soluble polyamide resin can replace high-cost polyurethane and provides good adhesion and flexibility.

3. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The aforementioned organosilicon resin can replace high-cost fluorocarbon polymers and provide sufficient hydrophobic properties. The silane coupling agent is selected as γ-methacryloyloxypropyltrimethoxysilane.

4. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The acid-resistant dye is a phthalocyanine dye that is stable in acidic environments, and the auxiliary colorant is an acid-resistant azo dye to enhance color stability.

5. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The industrial alcohol can be used to replace high-cost specialty solvents, the isopropanol is used to increase the drying rate, and the toluene is used to improve the solubility of the ink.

6. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The citric acid is used as a low-cost pH buffer, the borax acts as an alkaline buffer to form a buffer system with the citric acid, the nonionic surfactant is selected from polyethylene glycol ethers, and the antioxidant is selected from BHT.

7. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The ink reservoir is dried after being impregnated with calcium carbonate solution to form an acidic buffer structure. The pen tip is made of 304 stainless steel, and its surface is treated with silicone oil to provide hydrophobicity and avoid complex coating processes. The pen tip is connected using a compression structure.

8. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The outer shell is made of PP plastic with a wall thickness of 1.2-1.5mm, providing acid resistance. The sealing ring is made of nitrile rubber.

9. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The ink is prepared by means of: S1. Mixing solvents at room temperature; S2. Add the modified acrylic resin and alcohol-soluble polyamide resin to the solvent in sequence, and stir for 3-4 hours until dissolved; S3. Add the premixed coloring solution to the resin solution; S4. Finally, add the hydrophobic additive and other additives, and mix evenly for 1-2 hours. S5. Use a 100-mesh sieve to filter the ink and remove impurities.

10. The water-resistant, wipeable battery marker according to claim 1, characterized in that: The assembly of the pen body includes: A1. Use a standard injection molded part sealing structure; A2. Install the ink reservoir inside the sealed structure and install the pen tip at the end of the sealed structure; A3. Use filling equipment to inject the prepared ink into the ink reservoir; A4. Install the sealing ring and use a capping machine to install the inner cover; A5. Conduct a sealing test and a writing test on the assembled marker pen.

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