Zero-voc special anti-rust lubricating aerosol for embroidery machine and sewing machine and preparation thereof

Abstract

The application belongs to the technical field of lubricants, and particularly relates to a zero-VOC anti-rust lubricating aerosol special for embroidery machines and sewing machines and preparation thereof. The zero-VOC anti-rust lubricating aerosol special for embroidery machines and sewing machines provided by the application comprises the following components and mass fractions: base oil 45-81 parts, lanolin 15-35 parts, rust inhibitor 2-8 parts, antioxidant 0.5-3 parts, anti-wear agent 1-5 parts, and thickening agent 0.5-4 parts; the base oil comprises poly-alpha-olefin synthetic oil and type III hydrogenated base oil. The application can quickly penetrate to form a lubricating film, has good adhesion and lubrication durability, is very suitable for high-speed and precise textile machinery moving parts, integrates the functions of lubrication, rust prevention, oxidation resistance and wear resistance, and greatly prolongs the equipment maintenance cycle and service life. The product of the application is an environmentally-friendly lubricant completely free of harmful volatile organic compounds and does not pollute cloth.

Description

Technical Field

[0001] This invention belongs to the field of lubricant technology, specifically relating to a zero-VOC rust-preventive lubricating aerosol for embroidery machines and sewing machines and its preparation. Background Technology

[0002] Embroidery machines and sewing machines, as precision textile equipment with complex structures, dense moving parts, high operating speeds, and tiny clearances, play a crucial role in long-term, high-load, and continuous industrial production. Stable and reliable lubricants are the core foundation for ensuring their normal operation. High-quality lubricants can quickly form a continuous and resilient oil film between high-speed rotation, reciprocating motion, and precisely mating friction pairs. This effectively reduces component wear, suppresses operating temperature rise, prevents mechanical jamming, abnormal noises, and vibrations, and ensures smooth movement and precise positioning of key mechanisms such as the needle bar, shuttle, connecting rod, and guide rail, thereby stabilizing stitch quality and improving sewing and embroidery precision. At the same time, good lubrication can significantly extend the service life of core components such as the spindle, bearings, and sliders, reducing downtime due to malfunctions, lowering equipment maintenance costs and replacement losses, and improving overall production efficiency and continuity. Furthermore, specialized lubricants suitable for textile working conditions also possess characteristics such as low volatility, non-leakage, and non-contamination of fabrics, preventing oil stains from contaminating fabrics and causing defects, thus ensuring product appearance and production cleanliness. Therefore, lubricants not only directly determine the stability, durability, and precision retention of equipment operation, but also have an irreplaceable and important impact on production efficiency, product quality, and corporate economic benefits.

[0003] Precision textile equipment such as embroidery machines and sewing machines are characterized by complex structures, numerous moving parts, high operating speeds, and small clearances, placing extremely stringent demands on lubricants. Traditional lubricating oils or greases have the following problems:

[0004] (1) The contradiction between lubrication precision and penetration: Ordinary lubricating oil has low viscosity and is easy to flow, making it difficult to adhere to precision gear surfaces, guide rails and bearings for a long time, and it is easy to contaminate the fabric; while lubricating grease has high viscosity and is difficult to penetrate into the interior of the tight friction pair.

[0005] (2) Environmental and health hazards: Most commercially available spray lubricants (such as rust remover lubricants) use propane, butane, dimethyl ether, etc. as propellants and contain a large amount of petroleum solvents. For example, Chinese patent application CN120536168A discloses a cleaning lubricant for textile machinery, which includes the following components by weight: 6-14% petroleum ether, 16-26% solvent oil, 6-14% alkane oil, 16-26% 120# solvent oil, 31-39% butane gas, and 1-9% dimethyl silicone oil. However, the petroleum ether and other components contained in this patent are VOCs, which will evaporate into the air during use, not only polluting the working environment and harming the health of operators (causing dizziness and respiratory irritation), but also posing safety hazards if accumulated in the workshop for a long time.

[0006] (3) Insufficient functionality: Traditional lubricants often only focus on lubrication and lack comprehensive protection against oxidation caused by frequent start-stop of high-speed sewing equipment, rust caused by water erosion, and wear caused by long-term operation, resulting in accelerated equipment wear and short maintenance cycles.

[0007] Therefore, developing a specialized lubricant that can provide precise lubrication and long-lasting protection while being safe, environmentally friendly, and non-polluting to fabrics is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines, and its preparation method. The rust-preventive and lubricating aerosol provided by this invention can quickly penetrate to form a lubricating film and possesses excellent adhesion and long-lasting lubrication, making it ideal for use in high-speed, precision textile machinery moving parts. Furthermore, this invention integrates lubrication, rust prevention, anti-oxidation, and anti-wear functions, significantly extending equipment maintenance cycles and service life. The product of this invention is an environmentally friendly lubricant completely free of harmful volatile organic compounds (VOCs), which helps protect the health of operators and the safety of the workshop environment, and does not contaminate the fabric.

[0009] The technical solution of this invention is:

[0010] A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their weight percentages: 45-81 parts base oil, 15-35 parts lanolin, 2-8 parts rust inhibitor, 0.5-3 parts antioxidant, 1-5 parts anti-wear agent, and 0.5-4 parts thickener; wherein the base oil includes polyalphaolefin synthetic oil and Group III hydrogenated base oil.

[0011] Furthermore, the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines comprises the following components and their weight percentages: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener.

[0012] Furthermore, the base oil is composed of polyalphaolefin synthetic oil and Group III hydrotreated base oil in a mass ratio of 2-4:7-10.

[0013] Furthermore, the base oil is composed of polyalphaolefin synthetic oil and Group III hydrotreated base oil in a mass ratio of 3:8.

[0014] Furthermore, the polyalphaolefin synthetic oil is polyalphaolefin synthetic oil No. 6 (PAO6); the kinematic viscosity of the Group III hydrogenated base oil at 40°C is 40-50 mm² / s.

[0015] Furthermore, the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 4-7:2-3.

[0016] The rust inhibitor in this invention works in conjunction with lanolin to form a dense protective layer on the metal surface, effectively resisting corrosion from air moisture and acidic substances.

[0017] Furthermore, the antioxidant is a phenolic ester type antioxidant or an amine type antioxidant.

[0018] Furthermore, the phenolic ester type antioxidant is di-tert-butyl-p-cresol; the amine type antioxidant is alkylated diphenylamine.

[0019] The antioxidant in this invention can inhibit the oxidative deterioration of lubricants under the action of high-speed friction heat and air, thus extending the service life of the oil.

[0020] Furthermore, the anti-wear agent is a phosphorus-containing extreme pressure anti-wear agent or a sulfur-containing extreme pressure anti-wear agent.

[0021] Furthermore, the phosphorus-containing extreme pressure anti-wear agent is tricresyl phosphate; the sulfur-containing extreme pressure anti-wear agent is a sulfurized olefin.

[0022] The anti-wear agent in this invention reacts with the metal surface under high temperature and high pressure boundary lubrication conditions to form a chemical protective film, preventing severe wear.

[0023] Furthermore, the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 3-5:1.

[0024] Furthermore, the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 4:1.

[0025] Another object of the present invention is to provide a method for preparing the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines, comprising the following steps:

[0026] S1 Add base oil and lanolin to the container, heat to 50-65℃, and stir for 20-40 minutes to completely dissolve and evenly disperse the lanolin;

[0027] S2. While stirring, add the rust inhibitor, antioxidant, anti-wear agent and thickener to the container in sequence. After each additive is added, continue stirring for 10-20 minutes to ensure thorough mixing and dispersion.

[0028] S3. Fill the aerosol can with the well-mixed liquid from step S2.

[0029] S4 fills the aerosol can with propellant to the predetermined pressure and seals the valve with the nozzle;

[0030] After passing the S5 test, the product is packaged.

[0031] Further, the propellant in step S4 is compressed air or carbon dioxide.

[0032] Furthermore, the predetermined pressure in step S4 is set to 0.4-0.6 MPa at 25°C.

[0033] Sewing machines and embroidery machines are high-speed, precision-operating devices, requiring lubricants to possess both rapid penetration and low-resistance start-up, as well as high adhesion and long-lasting lubrication and rust prevention. However, lubrication precision and penetration are often contradictory: ordinary lubricating oils have low viscosity and flow easily, making it difficult to adhere to precision gear surfaces, guide rails, and bearings for extended periods, and they easily contaminate fabrics; while lubricating greases have high viscosity and struggle to penetrate the interior of tightly packed friction pairs. This invention addresses the inherent contradiction in the high-speed, precision operation of sewing and embroidery machines: low-viscosity oils penetrate easily but are not durable, while high-viscosity oils adhere strongly but are difficult to penetrate. It achieves a balance of "low-resistance penetration + strong film adhesion + long-lasting non-drainage" through an integrated technical solution of base oil compounding + lanolin + two-component thickener synergistic. The specific technical means are as follows:

[0034] This invention, through extensive creative experiments, has discovered that a base oil system formulated by blending polyalphaolefin synthetic oil No. 6 with Group III hydrogenated base oil at a mass ratio of 2–4:7–10 not only provides suitable viscosity and interfacial adhesion, preventing excessive flow of the base oil and providing stable support for subsequent film formation, but also exhibits excellent fluidity. This allows the aerosol to quickly penetrate into the minute gaps and tightly bound friction pairs of bearings, needle rods, sliders, and tooth surfaces after spraying, achieving low resistance, no jamming, and instant lubrication, fundamentally solving the contradiction of "too low viscosity leads to easy loss, too high viscosity makes penetration difficult." Simultaneously, the blending of polyalphaolefin synthetic oil No. 6 with Group III hydrogenated base oil also improves the product's high and low temperature resistance and enhances lubrication durability.

[0035] The addition of a specific amount of lanolin (15-35 parts) in this invention not only maintains the permeability of the system, allowing the lubricant to quickly penetrate and firmly adhere to the surface of precision parts, but also enables the lubricant to quickly form a continuous, flexible, and dense oil film on the metal surface after entering the friction pair. This forms a long-lasting lubricating film, enhancing sealing and rust prevention, effectively reducing friction and temperature rise during high-speed operation, while improving the continuity of spray film formation, avoiding dripping and splashing, achieving high-temperature resistance, high-speed resistance, and vibration resistance. It fills microscopic rough surfaces, reduces the coefficient of friction and operating noise, seals the metal surface, isolates moisture and dust, and provides long-lasting rust prevention. Through the synergistic effect of each component, the ideal state of "thin when it enters, thick when it reaches the target area, and firm after film formation" is achieved.

[0036] This invention employs a thickener composed of polyisobutylene and ethylene-propylene copolymer in a specific mass ratio to achieve "controllable viscosity and shear stability." This results in both excellent spray atomization and a certain adhesion thickness upon reaching the metal surface. The combination of the two not only enhances the adhesion and oil film strength at room temperature, preventing high-speed detachment, but also improves the viscosity index and shear stability, ensuring that the lubrication does not thin or become diluted during long-term high-speed operation. This ensures thorough penetration and long-lasting lubrication without loss, further enhancing lubrication durability.

[0037] This invention features a zero-VOC, solvent-free formula, preventing fabric contamination. The entire process uses no volatile solvents or diluents, resulting in no evaporation, oil mist, migration, or fabric staining after spraying. The oil film is flexible, does not crystallize, powder, or drip, completely solving the industry pain points of ordinary lubricants such as easy oil seepage, fabric staining, and oil spots.

[0038] Compared with the prior art, the present invention has the following significant advantages:

[0039] (1) This invention is absolutely environmentally friendly and safe: It uses compressed air / carbon dioxide as a propellant and does not use any low-boiling-point solvents in the formula, achieving true "zero VOC", fundamentally eliminating fire hazards and health hazards to operators, and meeting the most stringent environmental protection regulations.

[0040] (2) The present invention has excellent lubrication performance: the lubricant of the present invention can quickly penetrate and firmly adhere to the surface of precision parts to form a long-lasting lubricating film, effectively reducing friction and temperature rise during high-speed operation.

[0041] (3) The invention has strong comprehensive protection capabilities: The formula of the invention integrates lubrication, rust prevention, anti-oxidation and anti-wear functions, providing all-round protection for core moving parts such as needle bar, connecting rod, cam and bearing of embroidery machine and sewing machine, significantly reducing wear rate and extending equipment overhaul cycle.

[0042] (4) The present invention is convenient and clean to use: the aerosol form allows the lubricant to be accurately sprayed into hard-to-reach gaps and atomized evenly; moreover, the lubricant of the present invention has strong adhesion, is not easy to splash, and has no risk of contamination to expensive fabrics.

[0043] (5) The preparation process of this invention is green and simple: no harmful substances are generated in the entire preparation process, the filling process is mature and reliable, and it is suitable for large-scale industrial production. Detailed Implementation

[0044] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the scope of the present invention.

[0045] Unless otherwise specified, all raw materials used in this invention are commercially available. For example, polyalphaolefin synthetic oil No. 6 is from Maoming Zhengmao Petrochemical Co., Ltd.; Group III hydrotreated base oil is from Anmei Technology Co., Ltd.; lanolin is from Nanjing Duoyuan Bioengineering Co., Ltd., model EP8; polyisobutylene is from Daelim, South Korea, model PB1300; ethylene-propylene copolymer is from Jinzhou Shengda Chemical Co., Ltd., model T613; and sulfurized olefins are from Shenyang Guangda Chemical Co., Ltd., model GDT321D.

[0046] Example 1: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0047] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 81 parts base oil, 15 parts lanolin, 2 parts rust inhibitor, 0.5 parts antioxidant, 1 part anti-wear agent, and 0.5 parts thickener; the base oil is composed of polyalphaolefin synthetic oil No. 6 and Group III hydrogenated base oil in a mass ratio of 2:10; the Group III hydrogenated base oil has a kinematic viscosity of 40-50 mm² / s at 40°C; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 4:3; the antioxidant is di-tert-butyl-p-cresol; the anti-wear agent is tricresyl phosphate; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 3:1.

[0048] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines includes the following steps:

[0049] S1 Add base oil and lanolin to the container, heat to 50°C, and stir for 20 minutes to completely dissolve and evenly disperse the lanolin;

[0050] S2. While stirring, add the rust inhibitor, antioxidant, anti-wear agent and thickener to the container in sequence. After adding each additive, continue stirring for 10 minutes before adding the next additive. After all additives are added, continue stirring for 30 minutes to ensure thorough mixing and dispersion.

[0051] S3. Fill the well-mixed liquid from step S2 into 450mL tinplate aerosol cans, with a net content of 310g per can.

[0052] S4 uses an aerator to fill the aerosol can with dry carbon dioxide (propellant) until the pressure inside the can is 0.4 MPa at 25°C, and then seals the valve with the nozzle.

[0053] After passing the water bath leak test and pressure test, the S5 is fitted with an outer cover and packaged to obtain the finished product.

[0054] Example 2: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0055] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 45 parts base oil, 35 parts lanolin, 8 parts rust inhibitor, 3 parts antioxidant, 5 parts anti-wear agent, and 4 parts thickener; the base oil is composed of polyalphaolefin synthetic oil No. 6 and Group III hydrotreated base oil in a mass ratio of 4:7; the Group III hydrotreated base oil has a kinematic viscosity of 40-50 mm² / s at 40°C; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 7:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 5:1.

[0056] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines includes the following steps:

[0057] S1 Add base oil and lanolin to the container, heat to 65°C, and stir for 40 minutes to completely dissolve and evenly disperse the lanolin;

[0058] S2. While stirring, add the rust inhibitor, antioxidant, anti-wear agent and thickener to the container in sequence. After adding each additive, continue stirring for 20 minutes before adding the next additive. After all additives are added, continue stirring for 30 minutes to ensure thorough mixing and dispersion.

[0059] S3. Fill the well-mixed liquid from step S2 into 450mL tinplate aerosol cans, with a net content of 310g per can.

[0060] S4 uses an aerator to fill the aerosol can with dry carbon dioxide (propellant) until the pressure inside the can is 0.6 MPa at 25°C, and then seals the valve with the nozzle.

[0061] After passing the water bath leak test and pressure test, the S5 is fitted with an outer cover and packaged to obtain the finished product.

[0062] Example 3: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0063] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener; the base oil is composed of polyalpha-olefin synthetic oil and Group III hydrogenated base oil in a mass ratio of 3:8; the polyalpha-olefin synthetic oil is polyalpha-olefin synthetic oil No. 6; the kinematic viscosity of the Group III hydrogenated base oil at 40°C is 40-50 mm² / s; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 5:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 4:1.

[0064] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines includes the following steps:

[0065] S1 Add base oil and lanolin to the container, heat to 55°C, and stir for 40 minutes to completely dissolve and evenly disperse the lanolin;

[0066] S2. While stirring, add the rust inhibitor, antioxidant, anti-wear agent and thickener to the container in sequence. After adding each additive, continue stirring for 15 minutes before adding the next additive. After all additives are added, continue stirring for 30 minutes to ensure thorough mixing and dispersion.

[0067] S3. Fill the well-mixed liquid from step S2 into 450mL tinplate aerosol cans, with a net content of 310g per can.

[0068] S4 uses an aerator to fill the aerosol can with dry carbon dioxide (propellant) until the pressure inside the can is 0.6 MPa at 25°C, and then seals the valve with the nozzle.

[0069] After passing the water bath leak test and pressure test, the S5 is fitted with an outer cover and packaged to obtain the finished product.

[0070] Comparative Example 1: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0071] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener; the base oil is composed of polyalpha-olefin synthetic oil and Group I base oil in a mass ratio of 3:8; the polyalpha-olefin synthetic oil is polyalpha-olefin synthetic oil No. 6; the Group I base oil is a Group I base oil with a viscosity of 250 SN; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 5:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 4:1.

[0072] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines is the same as in Example 3.

[0073] Comparative Example 2: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0074] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener; the base oil is composed of polyalpha-olefin synthetic oil and Group III hydrogenated base oil in a mass ratio of 8:3; the polyalpha-olefin synthetic oil is polyalpha-olefin synthetic oil No. 6; the kinematic viscosity of the Group III hydrogenated base oil at 40°C is 40-50 mm² / s; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 5:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 4:1.

[0075] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines is the same as in Example 3.

[0076] Comparative Example 3: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0077] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener; the base oil is composed of polyalpha-olefin synthetic oil and Group III hydrogenated base oil in a mass ratio of 3:8; the polyalpha-olefin synthetic oil is polyalpha-olefin synthetic oil No. 6; the kinematic viscosity of the Group III hydrogenated base oil at 40°C is 40-50 mm² / s; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 5:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polymethyl methacrylate and ethylene-propylene copolymer in a mass ratio of 4:1.

[0078] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines is the same as in Example 3.

[0079] Comparative Example 4: A zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines.

[0080] The zero-VOC rust-preventive and lubricating aerosol for embroidery and sewing machines comprises the following components and their mass fractions: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener; the base oil is composed of polyalpha-olefin synthetic oil and Group III hydrogenated base oil in a mass ratio of 3:8; the polyalpha-olefin synthetic oil is polyalpha-olefin synthetic oil No. 6; the kinematic viscosity of the Group III hydrogenated base oil at 40°C is 40-50 mm² / s; the rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 5:2; the antioxidant is alkylated diphenylamine; the anti-wear agent is sulfurized olefin; and the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a mass ratio of 1:4.

[0081] The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines is the same as in Example 3.

[0082] Test Example 1: Appearance and Odor Test

[0083] The appearance of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention was tested using a visual inspection method. The odor of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention was tested using a sensory evaluation method. The results of the appearance and odor tests are shown in Table 1.

[0084] Table 1 Results of Appearance and Odor Tests

[0085]

[0086] As shown in Table 1, the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention are all uniform brown, semi-transparent oily liquids, free of suspended matter and impurities, fully meeting the typical requirements of "uniform, free of suspended matter and impurities". Furthermore, the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention all exhibit a slight oily odor and no irritating solvent odor, satisfying the typical requirements of "slight oily odor and no irritating solvent odor".

[0087] Test Example 2: Physical Performance Testing

[0088] The physical properties (kinematic viscosity, density, flash point) of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention, as well as the zero-VOC rust-preventive and lubricating aerosols prepared in Comparative Examples 1, 2, 3, and 4, were tested with reference to relevant standards. The test results of the physical properties are shown in Table 2.

[0089] Table 2 Physical Performance Test Results

[0090]

[0091] As shown in Table 2, the kinematic viscosity of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention is within the required range of 40–50 mm² / s at 40°C, indicating that the kinematic viscosity is qualified. However, the kinematic viscosity of Comparative Examples 3 and 4 is outside the required range of 40–50 mm² / s, indicating that the kinematic viscosity is unqualified. The density of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, 3, 1, 2, 3, and 4 at 20°C is within the range of 0.82–0.88 g / cm³, meeting the requirements. The open flash point of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention is significantly higher than the requirement of ≥180°C, demonstrating outstanding safety.

[0092] Experimental Example 3: VOC Content Test

[0093] The VOC content of the zero-VOC rust-preventive and lubricating aerosols for embroidery machines and sewing machines prepared in Examples 1, 2, and 3 of this invention was tested according to relevant standards. The VOC content test results are shown in Table 3.

[0094] Table 3. VOC content test results

[0095]

[0096] As can be seen from Table 3, the VOC content of the zero-VOC rust-preventive and lubricating aerosols for embroidery machines and sewing machines prepared in Examples 1, 2 and 3 of this invention is undetectable, fully achieving the zero-VOC design goal and truly realizing zero VOC, with excellent environmental performance.

[0097] Test Example 4: Lubrication Durability Test

[0098] The lubrication durability of the zero-VOC rust-preventive and lubricating aerosols for embroidery and sewing machines prepared in Examples 1, 2, and 3 of this invention, as well as the zero-VOC rust-preventive and lubricating aerosols prepared in Comparative Examples 1, 2, 3, and 4, was tested in field. The results of the lubrication durability test are shown in Table 4.

[0099] Table 4 Results of Lubrication Durability Test

[0100]

[0101] Note 1: Lubrication durability test method: When the noise level in the working environment is greater than 80 decibels, apply lubricant to the sewing machine, embroidery machine needle, shaft, and gear. The interval between each application is the lubrication durability. The longer the interval, the better the lubrication durability.

[0102] As shown in Table 4, in the lubrication durability test, the zero-VOC rust-preventive lubricating aerosols for embroidery machines and sewing machines prepared in Examples 1, 2, and 3 of this invention were added once every 168 days, 175 days, and 186 days, respectively. This demonstrates that the zero-VOC rust-preventive lubricating aerosol for embroidery machines and sewing machines prepared in this invention has a long-cycle lubrication effect and excellent lubrication durability, significantly extending the lubrication add-on interval for the equipment and reducing maintenance costs. In contrast, Comparative Examples 1, 2, 3, and 4 had lubrication durability of 112 days, 125 days, 131 days, and 118 days, respectively, indicating short lubrication durability.

[0103] Test Example 5: Rust Prevention Test

[0104] The rust-preventive properties of the zero-VOC rust-preventive and lubricating aerosols for embroidery machines and sewing machines prepared in Examples 1, 2, and 3 of this invention were tested according to the neutral salt spray test (NSS) method in GB / T 10125. The rust-preventive test results are shown in Table 5.

[0105] Table 5 Rust prevention test results

[0106]

[0107] As can be seen from Table 5, in the rust prevention test, the zero-VOC rust-preventive and lubricating aerosols for embroidery machines and sewing machines prepared in Examples 1, 2 and 3 of this invention showed no rust after 72h, 88h and 84h respectively. This indicates that the products of this invention have excellent rust prevention performance and reliable overall protection.

Claims

1. A zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines, characterized in that, The product comprises the following components and their weight percentages: 45-81 parts base oil, 15-35 parts lanolin, 2-8 parts rust inhibitor, 0.5-3 parts antioxidant, 1-5 parts anti-wear agent, and 0.5-4 parts thickener; the base oil is composed of polyalphaolefin synthetic oil and Group III hydrotreated base oil in a weight ratio of 2-4:7-10; the thickener is composed of polyisobutylene and ethylene-propylene copolymer in a weight ratio of 3-5:1; the polyalphaolefin synthetic oil is polyalphaolefin synthetic oil No. 6; the kinematic viscosity of the Group III hydrotreated base oil at 40°C is 40-50 mm² / s; the anti-wear agent is a phosphorus-containing extreme pressure anti-wear agent or a sulfur-containing extreme pressure anti-wear agent; the phosphorus-containing extreme pressure anti-wear agent is tricresyl phosphate; the sulfur-containing extreme pressure anti-wear agent is a sulfurized olefin. The preparation method of the zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines includes the following steps: S1 Add base oil and lanolin to the container, heat to 50-65℃, and stir for 20-40 minutes to completely dissolve and evenly disperse the lanolin; S2. While stirring, add the rust inhibitor, antioxidant, anti-wear agent and thickener to the container in sequence. After each additive is added, continue stirring for 10-20 minutes to ensure thorough mixing and dispersion. S3. Fill the aerosol can with the well-mixed liquid from step S2. S4 fills the aerosol can with propellant to the predetermined pressure and seals the valve with the nozzle; After passing the S5 test, the product is packaged.

2. The zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines according to claim 1, characterized in that, It includes the following components and their weight percentages: 70 parts base oil, 15 parts lanolin, 7 parts rust inhibitor, 2.5 parts antioxidant, 3 parts anti-wear agent, and 1.5 parts thickener.

3. The zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines according to claim 1 or 2, characterized in that, The rust inhibitor is composed of barium petroleum sulfonate and zinc naphthenate in a mass ratio of 4-7:2-3.

4. The zero-VOC rust-preventive and lubricating aerosol for embroidery machines and sewing machines according to claim 1 or 2, characterized in that, The antioxidant is a phenolic ester type antioxidant or an amine type antioxidant.

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