Anti-layering makeup removing wet tissue and preparation method thereof

Abstract

The invention relates to the technical field of wet tissue production and preparation, in particular to an anti-layering makeup removing wet tissue and a preparation method thereof.The preparation method comprises the steps that deionized water is heated, xanthan gum, gellan gum, carbomer, decyl glucoside, PEG-40 hydrogenated castor oil, polysorbate-20, cocamidopropyl betaine, sodium chloride, sodium citrate and vitamin E are sequentially added, and stirring is continuously conducted for 20 min; uniformly premixing PEG-7 glyceryl cocoate, PEG-6 caprylic / caprin, jojoba oil, grape seed oil, sunflower seed oil and macadamia nut oil, then slowly adding the mixture into the water phase, starting a double-layer stirring paddle at the same time for staged mixing, then carrying out homogenization treatment on feed liquid, and carrying out vacuum degassing on the homogenized feed liquid, so as to obtain a finished product. The composition is impregnated in a base material by adopting a microwave-assisted impregnation process, and finally, a packaged wet tissue finished product is subjected to irradiation sterilization. The cleaning agent can be stored at normal temperature, high temperature and low temperature without layering and abnormity and is high in cleaning capacity.

Description

Technical Field

[0001] The invention relates to the technical field of wet wipe production and preparation, and more specifically, to an anti-stratification makeup removing wet wipe and a preparation method thereof. Background Art

[0002] Makeup remover wipes are widely used in the field of personal care because of their convenience in carrying and quick use. In order to effectively remove various cosmetics, especially makeup products with strong oil solubility or waterproof properties (such as foundation, mascara, lipstick, etc.), the impregnation liquid composition of makeup remover wipes usually needs to contain a certain proportion of oil phase components as solvents. At the same time, the composition also contains water phase components as a continuous phase or dispersion medium, and can carry other cleaning, moisturizing or conditioning components.

[0003] However, due to the physical property that oil and water are immiscible, a makeup remover composition comprising an oil phase and a water phase has an inherent problem that phase separation easily occurs during static storage or transportation, resulting in obvious oil-water stratification.

[0004] This oil-water stratification has many adverse effects on the product. First, it destroys the uniformity of the product, affecting its appearance and consumer acceptance. Second, stratification causes the active ingredients impregnated on the wet wipe substrate (such as oil-phase makeup removers and water-phase active ingredients) to be unevenly distributed. This may cause users to encounter a situation where some wet wipes are insufficient in makeup removal ability, while others are too greasy, which significantly reduces the actual cleaning effect of the product and the overall user experience.

[0005] In order to solve the above oil-water separation problem, a common method is to add a higher content of emulsifiers or surfactants to reduce the oil-water interfacial tension and form a relatively stable emulsion system. However, excessive addition of such ingredients will not only increase product costs, but also cause skin irritation or allergic reactions, and also bring unpleasant skin feelings (such as stickiness and a feeling of not being rinsed clean), which is contrary to the trend of makeup removers pursuing gentleness and freshness.

[0006] Another approach is to reduce the stratification tendency by reducing the proportion of oil phase ingredients in the formula. However, the oil phase content is directly related to the product's ability to remove makeup. Excessive reduction of the oil phase will significantly weaken its ability to dissolve heavy makeup or waterproof makeup, and cannot meet consumers' cleaning needs.

[0007] In addition, there are also technical attempts to improve the dispersion of the oil phase by improving the physical mixing process, such as extending the stirring time or using high shear equipment. However, this method often only treats the symptoms and not the root cause, with high energy consumption and low production efficiency. It can usually only delay stratification to a certain extent, making it difficult to ensure that the product maintains long-term physical stability throughout the shelf life, and the risk of stratification still exists significantly.

[0008] In summary, the existing technology still faces challenges in developing oil-containing makeup remover wipes with excellent makeup removal performance, good skin mildness and long-term storage stability. Therefore, the market is in urgent need of a new technical solution that can effectively inhibit or prevent the oil-water separation of makeup remover wipe compositions without sacrificing the makeup removal effect and safety of the product, and can meet the efficiency and cost requirements of industrial production. Summary of the invention

[0009] To this end, the object of the present invention is to provide an anti-stratification makeup remover wet wipe and a preparation method thereof, which can be stored at room temperature, high temperature and low temperature without stratification or abnormality and has strong cleaning ability.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] An anti-stratification makeup removing wet wipe comprising:

[0012] Wet wipes substrate,

[0013] The composition impregnated on the wet wipe substrate comprises the following components by weight percentage:

[0014] Aqueous phase: balance;

[0015] Oil phase: 5%-15%, composed of the following components:

[0016] Hydrophilic modified oil, accounting for 60%-90% of the weight of the oil phase, selected from PEG-7 glyceryl cocoate and PEG-6 caprylic capric glyceride;

[0017] A light natural oil, accounting for 10% to 40% by weight of the oil phase, selected from jojoba oil, grape seed oil, sunflower seed oil and macadamia oil;

[0018] Polysaccharide stabilizer: 0.1%-0.7%;

[0019] Carbomer: 0.05%-0.2%;

[0020] Surfactants: 1.5%-18%, including:

[0021] A nonionic surfactant, accounting for 70% to 95% of the total weight of the surfactant, selected from decyl glucoside, PEG-40 hydrogenated castor oil, and polysorbate-20;

[0022] The zwitterionic surfactant, which accounts for 5% to 30% of the total weight of the surfactant, is cocamidopropyl betaine;

[0023] Electrolyte: 0.3%-0.8%, selected from at least one of sodium chloride and sodium citrate;

[0024] Active skin care ingredients: 0.1%-2%, at least one selected from vitamin E, hyaluronic acid, and panthenol;

[0025] pH adjuster: an amount used to adjust the pH value of the composition to be stable at 4.5-7.0;

[0026] The total weight percentage of each component is 100%.

[0027] The present invention is further configured as follows: the polysaccharide stabilizer comprises xanthan gum and gellan gum,

[0028] The content of xanthan gum is 0.1%-0.5%;

[0029] The content of gellan gum is 0.05%-0.2%.

[0030] The present invention is further configured as follows: the hydrophilic modified oil is a mixture of PEG-7 glyceryl cocoate and PEG-6 caprylic capric glyceride, and the weight ratio between the two is 1:1-4:1.

[0031] The present invention is further configured as follows: the light natural source oil consists of jojoba oil, grape seed oil and sunflower seed oil, and the weight ratio of the three is 2:1:1-4:1:1.

[0032] The present invention is further configured as follows: the nonionic surfactant is composed of decyl glucoside, PEG-40 hydrogenated castor oil and polysorbate-20, and the weight ratio of the three is 5:1:2 to 7:1:3.

[0033] The present invention is further configured as follows: the electrolyte is a mixture of sodium chloride and sodium citrate, and the weight ratio of the two is 2:1-5:1.

[0034] A method for preparing makeup removing wet wipes comprises the following steps:

[0035] S1. Heat the water phase to 30-40°C, add polysaccharide stabilizer, carbomer, surfactant, electrolyte and active skin care ingredients in sequence, and stir at 200-500 rpm for 10-20 minutes;

[0036] S2. Heat the oil phase to 40-50°C and slowly add it to the water phase, using a double-layer stirring paddle to mix in stages:

[0037] S21, first stage: upper paddle 800-1200rpm, lower paddle 200-400rpm, stirring for 5-15 minutes;

[0038] S22, second stage: the upper paddle is reduced to 300-600 rpm, the lower paddle is adjusted to 50-150 rpm, and stirring is performed for 10-20 minutes;

[0039] S3. Add pH regulator to adjust pH to 5.0-6.5, and soak the wet wipes substrate after homogenization. The liquid content is 180%-220% of the weight of the substrate.

[0040] The present invention is further configured as follows: the homogenization treatment pressure is 12-18 MPa, and the wet wipes are sterilized by 60Co-γ ray irradiation with a dosage of 10-12 kGy.

[0041] The present invention is further configured as follows: the wet wipes substrate is a hydrophilically modified bicomponent spunbonded nonwoven fabric, the fiber diameter of which is 1.2-2.5 denier and the unit weight is 40-60 g / m².

[0042] The present invention is further configured as follows: after the homogenization treatment in step S3, the following steps are further included:

[0043] The vacuum degassing process is used to degas for 5-10 minutes at a pressure of -0.08MPa to -0.1MPa, and the volume proportion of bubbles in the composition is controlled to be ≤0.5%;

[0044] The wet wipes substrate was treated with a microwave-assisted impregnation process at a frequency of 2.45 GHz and a power density of 5-8 W / g for 30-60 seconds, so that the composition penetrated to a depth of 80%-95% of the thickness of the substrate.

[0045] Compared with the shortcomings of the prior art, the beneficial effects of the present invention are:

[0046] A three-dimensional network structure is formed through the compounding of xanthan gum and gellan gum and the synergistic effect of electrolytes. Combined with the staged mixing process (alternating high / low speed stirring) and vacuum degassing technology, the oil phase can be stored for a long time at room temperature without stratification.

[0047] The oil phase adopts a compound system of hydrophilic modified oils and light natural oils, and the solubility rate of waterproof makeup is ≥99.5%; at the same time, the surfactant is mainly non-ionic, with a low content of zwitterionic ingredients to reduce irritation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a process flow chart of the present invention; DETAILED DESCRIPTION

[0049] Reference Figure 1 The anti-stratification makeup removing wet wipes and the preparation method thereof are further described, and specifically include: a wet wipe substrate and a composition impregnated on the wet wipe substrate.

[0050] Wet wipes substrate: A two-component (e.g., skin-core structure, such as PE / PET or PE / PP) spunbonded nonwoven fabric that has been hydrophilically modified is used as the wet wipes substrate. The hydrophilic modification ensures that the substrate can quickly and evenly absorb and carry the liquid composition. The two-component structure can take into account both the softness and strength of the substrate.

[0051] The preferred fiber diameter range is 1.2-2.5 denier. Finer fibers help improve the softness and liquid absorption capacity of the substrate, while the appropriate combination of thickness and fineness can ensure strength.

[0052] The preferred range of unit weight is 40-60g / m². This weight range provides sufficient liquid carrying capacity and suitable thickness and feel, while taking into account cost-effectiveness.

[0053] Composition: An oil-water mixed composition capable of resisting stratification. The composition comprises the following key components by weight percentage:

[0054] Aqueous phase: Deionized water or purified water is used as the matrix of the composition. Its content is the balance, constituting the main body of the composition, and is used to dissolve water-soluble components and disperse the oil phase.

[0055] Oil phase: The total content is controlled between 5% and 15%. This range balances the makeup removal ability (especially for oil-soluble makeup) and the stability of the system. Too low will result in insufficient makeup removal, while too high will significantly increase the risk of stratification. The oil phase is carefully compounded with two types of oils in a specific ratio:

[0056] Hydrophilic modified oils account for 60%-90% of the total weight of the oil phase. This type of oil is chemically modified (such as polyethylene glycolization) to introduce hydrophilic groups, which makes it have a certain self-emulsification ability or better water dispersibility, which helps to reduce the oil-water interfacial tension and promote emulsion stability. The combination of PEG-7 glyceryl cocoate and PEG-6 caprylic / capric glyceride is preferred. These two oils are mild in nature, have a good skin feel, and have good makeup removal performance. When the two are compounded in a weight ratio of 1:1 to 4:1 (preferably with a higher PEG-7 content), they can provide good makeup removal power while significantly helping the oil droplets to disperse stably in the water phase.

[0057] Lightweight, naturally derived oils make up 10% to 40% of the total weight of the oil phase. These natural oils help dissolve makeup, especially certain specific makeup ingredients, while providing nourishing, moisturizing and improving skin feel, avoiding the heavy feeling that mineral oils or heavy synthetic esters may bring.

[0058] A combination of jojoba oil, grape seed oil, sunflower seed oil and macadamia oil is preferred. Among them, jojoba oil has a structure similar to sebum and has high stability; grape seed oil is rich in linoleic acid and has a light texture; sunflower seed oil and macadamia oil are rich in vitamin E and unsaturated fatty acids and have a repairing effect. Jojoba oil, grape seed oil, and (sunflower seed oil + macadamia oil) are compounded according to a specific weight ratio, such as (jojoba oil): (grape seed oil): (sum of sunflower seed oil and macadamia oil) = 2:1:1 to 4:1:1, to obtain ideal solubility, stability and skin feel. Sunflower seed oil and macadamia oil can be mixed and used in a ratio of, for example, 1:1.

[0059] The total content of polysaccharide stabilizer is 0.1%-0.7%. Polysaccharide stabilizer can form a three-dimensional network structure in the water phase, which is the key to achieve long-term anti-stratification by increasing the viscosity of the water phase and providing steric hindrance to hinder the aggregation and floating of oil droplets. The present invention adopts a compound system of xanthan gum and gellan gum:

[0060] Xanthan gum: content 0.1%-0.5%. As the main stabilizer, it can produce high viscosity even at low concentrations and form an effective pseudoplastic fluid network.

[0061] Gellan gum: content 0.05%-0.2%. When combined with xanthan gum, it can improve the stability of the system at different temperatures (especially low temperature stability), and can interact with certain ions in the formula (such as electrolytes) to further strengthen the gel network structure.

[0062] The content of carbomer is 0.05%-0.2%. As an auxiliary thickener and stabilizer, carbomer can form a transparent gel after neutralization (through a pH adjuster), further increasing the viscosity of the water phase and helping to better absorb and retain the liquid between the fibers of the wet wipes substrate, improving the uniformity of liquid distribution and release during use.

[0063] The total content of surfactants is 1.5%-18%. The main function of surfactants is to reduce the oil-water interfacial tension, assist emulsification, and help the oil phase to be evenly dispersed in the water phase in the form of fine droplets. The present invention adopts a synergistic compound system of nonionic and zwitterionic surfactants to balance cleaning power, emulsification efficiency and mildness:

[0064] Nonionic surfactants account for 70%-95% of the total weight of surfactants. Nonionic surfactants are usually less irritating and are a guarantee of mildness in the formula. The combination of decyl glucoside, PEG-40 hydrogenated castor oil and polysorbate-20 is preferred. Decyl glucoside has good detergency and low irritation; PEG-40 hydrogenated castor oil is an excellent solubilizer that helps dissolve flavors, oil-soluble active ingredients, and assists in emulsification; polysorbate-20 is also a commonly used O / W emulsifier and solubilizer. The three are compounded in a specific weight ratio, such as 5:1:2 to 7:1:3, to obtain optimized emulsification, solubilization effects and mild properties.

[0065] Zwitterionic surfactants account for 5% to 30% of the total weight of surfactants. Zwitterionic surfactants (such as betaines) show low irritation in a specific pH range, can improve the overall mildness of the formula, and help to produce moderate foam (if necessary) and improve low temperature stability. The present invention uses cocamidopropyl betaine.

[0066] The electrolyte content is 0.3%-0.8%. Adding an appropriate amount of inorganic salt or organic acid salt (such as sodium chloride, sodium citrate) can produce a "salt effect" on the network structure of polysaccharide stabilizers (especially gellan gum) and carbomer, and through the compression of the double electric layer and the shielding of charges, the polymer chains are curled or cross-linked more tightly, thereby enhancing the gel strength and the long-term stability of the system and resisting the aggregation of oil droplets. The present invention preferably uses at least one of sodium chloride and sodium citrate, or a mixture of the two. When mixed for use, for example, mixed in a weight ratio of 2:1 to 5:1 (sodium chloride: sodium citrate), the effects on different stabilizers and the overall sensory properties of the system can be better balanced.

[0067] The content of active skin care ingredients is 0.1%-2%. In order to provide certain skin care effects while removing makeup, one or more active ingredients can be added. For example, vitamin E and its derivatives have antioxidant effects; hyaluronic acid and its sodium salt are excellent moisturizers; panthenol has moisturizing and repairing effects.

[0068] The pH adjuster is added in an appropriate amount to adjust and stabilize the pH value of the final composition within the range of 4.5 to 7.0 (preferably 5.0-6.5). This pH range is close to the natural weakly acidic environment of the skin, which helps maintain the health of the skin barrier and reduce irritation. Commonly used pH adjusters include acids (such as citric acid, lactic acid) or bases (such as sodium hydroxide, triethanolamine, arginine, among which arginine can also be used to neutralize carbomer).

[0069] To ensure the microbiological safety of the product during its shelf life it also has preservatives.

[0070] The preparation method comprises the following key steps:

[0071] S1. Preparation of aqueous phase: Add the calculated amount of deionized water into a reactor with a stirring device and heat to 30-40°C. At this temperature, slowly add and disperse the polysaccharide stabilizer (xanthan gum, gellan gum) and carbomer in sequence to avoid agglomeration. After it is fully swollen, add surfactants (non-ionic and zwitterionic), electrolytes and water-soluble active skin care ingredients, and stir at medium-low speed (such as 200-500rpm) for 10-20 minutes to ensure that all water-soluble components are dissolved or dispersed evenly.

[0072] S2. Oil-water mixing and emulsification: Premix the calculated amounts of the oil phase components (hydrophilic modified oils and natural oils) evenly and heat them to 40-50°C to reduce their viscosity and make them easier to disperse. Then, slowly add the preheated oil phase to the stirring water phase. This process uses a specially designed double-layer stirring paddle for staged mixing and emulsification:

[0073] Impeller design: It is preferred that the upper impeller be a high-speed shear impeller (such as turbine type, dispersion disc type), and the lower impeller be a low-speed scraping mixing impeller (such as anchor type, frame type with scraper). The double-layer impeller can be coaxial but with independent speed control.

[0074] S21, the first stage (high-speed shear emulsification): start double-layer stirring. The upper stirring paddle runs at a higher speed (such as 800-1200rpm), providing strong shear force to quickly break up the added oil phase into fine oil droplets to achieve preliminary emulsification. At the same time, the lower stirring paddle runs at a lower speed (such as 200-400rpm) to ensure that the materials at the bottom of the kettle are fully mixed to prevent sedimentation or local uneven concentration. This stage lasts for 5-15 minutes.

[0075] S22, the second stage (slow-speed stable homogenization): reduce the speed of the upper stirring paddle to medium-low speed (such as 300-600rpm) to reduce the damage to the stabilizer network structure that may be formed due to excessive shearing. The lower stirring paddle is also adjusted to a lower speed (such as 50-150rpm) to maintain the overall slow mixing and circulation flow of the system to promote the homogenization and stabilization of the system. This stage lasts for 10-20 minutes. Compared with single constant speed stirring, this staged and differentiated rate stirring method can more effectively achieve fine dispersion of the oil phase and long-term stability of the emulsion system, while reducing energy consumption.

[0076] S3, pH adjustment, homogenization, impregnation and post-treatment:

[0077] After the emulsion system is uniform and stable, slowly add the pH adjuster to accurately adjust the pH value of the system to the target range (preferably 5.0-6.5).

[0078] Homogenization: In order to further reduce the oil droplet size and improve the physical stability of the emulsion, the prepared emulsion is treated by a high-pressure homogenizer. The homogenization pressure is preferably controlled at 12-18 MPa.

[0079] Vacuum degassing: To remove bubbles that may be mixed in during the stirring and transfer process (bubbles will affect the product appearance, stability and subsequent impregnation effect), the homogenized composition is subjected to vacuum degassing. Degassing is performed at a vacuum degree of -0.08MPa to -0.1MPa for 5-10 minutes, with the goal of controlling the volume percentage of bubbles remaining in the final composition to less than 0.5%.

[0080] Microwave-assisted impregnation: The degassed composition is used to impregnate the wet wipe substrate. To improve the efficiency and uniformity of impregnation, especially for thicker or more tightly structured substrates, the wet wipe substrate (usually folded) is exposed to a microwave field with specific parameters (frequency 2.45GHz, power density 5-8W / g, treatment time 30-60 seconds). Microwaves can selectively heat the liquid composition, reduce its viscosity and generate internal pressure, thereby accelerating the penetration of the liquid into the substrate. The goal is to make the penetration depth of the composition reach 80%-95% of the thickness of the substrate to ensure that the inside of the wet wipe is also fully soaked. The final liquid content (composition weight / substrate dry weight) is controlled between 180% and 220% to ensure that the wet wipe has enough liquid for cleaning, but is not too wet.

[0081] Sterilization: For makeup remover wipes that require sterility assurance, final sterilization is usually performed after packaging. The present invention can use cobalt-60 ( ) Gamma ray irradiation sterilization, the irradiation dose is preferably controlled at 10-12 kGy. This dose is sufficient to kill microorganisms while having little impact on product contents and packaging materials.

[0082] Through the above-mentioned optimized formula and preparation method, the present invention can obtain anti-stratification makeup removing wet wipes with uniform appearance, no oil-water stratification, good makeup removing effect, mild and comfortable skin feel, and good storage stability.

[0083] The present invention is described below by specific embodiments:

[0084] Embodiment 1:

[0085] Provided is an anti-stratification makeup remover wet wipe composition, wherein the components thereof include, by weight percentage:

[0086] Oil phase, total amount 5.00%, the oil phase is composed of the following components: 1.50% PEG-7 glyceryl cocoate (accounting for 30% of the weight of the oil phase) and 1.50% PEG-6 caprylic / capric glycerides (accounting for 30% of the weight of the oil phase), the weight ratio of the two is 1:1, and the total weight of the hydrophilic modified oils and fats is 60% of the weight of the oil phase; and light natural source oils composed of 0.80% jojoba oil (accounting for 16% of the weight of the oil phase), 0.40% grape seed oil (accounting for 8% of the weight of the oil phase), 0.40% sunflower seed oil (accounting for 8% of the weight of the oil phase, the weight ratio of sunflower seed oil to macadamia oil is 1:1) and 0.40% macadamia oil (accounting for 8% of the weight of the oil phase), the total weight of the light natural source oils is 40%, wherein the weight ratio of jojoba oil:grape seed oil:(sunflower seed oil+macadamia oil) is 2:1:1;

[0087] Polysaccharide stabilizer, total amount 0.15%, including: xanthan gum 0.10% and gellan gum 0.05%;

[0088] Carbomer 980, dosage is 0.05%;

[0089] Surfactant, total amount is 1.50%, which comprises 70% of the total weight of surfactant (i.e. 1.05% of the total weight of the composition) of nonionic surfactant and 30% of the total weight of surfactant (i.e. 0.45% of the total weight of the composition) of zwitterionic surfactant; the nonionic surfactant is composed of 0.656% decyl glucoside (APG) (43.75% of the weight of the surfactant), 0.131% PEG-40 hydrogenated castor oil (8.75% of the weight of the surfactant) and 0.263% polysorbate-20 (17.5% of the weight of the surfactant), and the weight ratio of the three is about 5:1:2; the zwitterionic surfactant is 0.45% cocamidopropyl betaine (CAPB);

[0090] Electrolyte, total amount 0.30%, which is a mixture of 0.20% sodium chloride and 0.10% sodium citrate, the weight ratio of the two being 2:1;

[0091] Active skin care ingredients, total amount 0.10%, which is vitamin E 0.10%;

[0092] pH adjuster (citric acid / NaOH) qs, used to adjust the final pH to 5.0;

[0093] Deionized water, add to 100%.

[0094] The preparation method of the composition is as follows:

[0095] S1. Heat deionized water to 30°C, add xanthan gum, gellan gum, carbomer 980, decyl glucoside, PEG-40 hydrogenated castor oil, polysorbate 20, cocamidopropyl betaine, sodium chloride, sodium citrate and vitamin E in sequence under stirring at 200 rpm, and continue stirring for 20 minutes;

[0096] S2, pre-mix PEG-7 glyceryl cocoate, PEG-6 caprylic / capric glyceride, jojoba oil, grape seed oil, sunflower seed oil and macadamia oil evenly and heat to 40°C, then slowly add to the water phase of S1, and start the double-layer stirring paddle to mix in stages:

[0097] S21, first stage: the upper turbine propeller speed is 800 rpm, the lower anchor propeller speed is 200 rpm, stirring for 15 minutes;

[0098] S22, second stage: the speed of the upper turbine propeller is reduced to 300 rpm, the speed of the lower anchor propeller is reduced to 50 rpm, and stirring is continued for 20 minutes;

[0099] S3. Add pH regulator to adjust pH to 5.0, and then homogenize the liquid through a high-pressure homogenizer at a pressure of 12MPa. The homogenized liquid is vacuum degassed at a pressure of -0.08MPa for 10 minutes. A PE / PET bicomponent spunbond nonwoven fabric with a fiber diameter of 1.2 denier and a unit weight of 40g / m² is selected as the substrate, and the composition is impregnated into the substrate using a microwave-assisted impregnation process (frequency 2.45GHz, power density 5W / g, treatment time 60 seconds), and the liquid content is controlled to be 180% of the weight of the substrate. Finally, the packaged wet wipes are 60 Co irradiation sterilization, the dose is 10kGy.

[0100] Embodiment 2:

[0101] Provided is an anti-stratification makeup remover wet wipe composition, wherein the components thereof include, by weight percentage:

[0102] The oil phase has a total amount of 15.00%, and the oil phase is composed of the following components: 10.80% PEG-7 glyceryl cocoate (accounting for 72% of the weight of the oil phase) and 2.70% PEG-6 caprylic / capric glycerides (accounting for 18% of the weight of the oil phase), the weight ratio of the two is 4:1, and the total weight of the hydrophilic modified oil accounts for 90% of the weight of the oil phase; and a light natural source oil composed of 0.60% jojoba oil (accounting for 4% of the weight of the oil phase), 0.15% grape seed oil (accounting for 1% of the weight of the oil phase), 0.375% sunflower seed oil (accounting for 2.5% of the weight of the oil phase, the weight ratio of sunflower seed oil to macadamia oil is 1:1) and 0.375% macadamia oil (accounting for 2.5% of the weight of the oil phase), and the total weight of the light natural source oil accounts for 10% of the weight of the oil phase, wherein the weight ratio of jojoba oil:grape seed oil:(sunflower seed oil+macadamia oil) is 4:1:1;

[0103] Polysaccharide stabilizer, total amount 0.70%, including: xanthan gum 0.50% and gellan gum 0.20%;

[0104] Carbomer 980, dosage is 0.20%;

[0105] Surfactant, total amount is 18.00%, which comprises 95% of the total weight of surfactant (i.e. 17.10% of the total weight of the composition) of nonionic surfactant and 5% of the total weight of surfactant (i.e. 0.90% of the total weight of the composition) of zwitterionic surfactant; the nonionic surfactant is composed of 11.97% decyl glucoside (APG) (66.5% of the weight of the surfactant), 1.71% PEG-40 hydrogenated castor oil (9.5% of the weight of the surfactant) and 3.42% polysorbate-20 (19.0% of the weight of the surfactant), and the weight ratio of the three is about 7:1:3; the zwitterionic surfactant is 0.90% cocamidopropyl betaine (CAPB);

[0106] Electrolyte, total amount 0.80%, which is a mixture of 0.67% sodium chloride and 0.13% sodium citrate, the weight ratio of the two is 5:1;

[0107] Active skin care ingredients, totaling 2.00%, which are 1.00% sodium hyaluronate and 1.00% panthenol;

[0108] pH adjuster (citric acid / NaOH) qs, used to adjust the final pH to 6.5;

[0109] Deionized water, add to 100%.

[0110] The preparation method of the composition is as follows:

[0111] S1. Heat deionized water to 40°C, add materials in order under stirring at 500 rpm, and stir for 10 minutes;

[0112] S2, pre-mix the oil phase evenly and heat it to 50°C, then slowly add it to the water phase of S1, and start the double-layer stirring paddle to mix in stages:

[0113] S21, first stage: the upper turbine propeller speed is 1200 rpm, the lower anchor propeller speed is 400 rpm, stirring for 5 minutes;

[0114] S22, second stage: the speed of the upper turbine propeller is reduced to 600 rpm, and the speed of the lower anchor propeller is reduced to 150 rpm, and stirring is continued for 10 minutes;

[0115] S3. Add pH regulator to adjust pH to 6.5, and then homogenize the liquid through a high-pressure homogenizer at a pressure of 18MPa. The homogenized liquid is vacuum degassed at a pressure of -0.1MPa for 5 minutes. A PE / PET bicomponent spunbond nonwoven fabric with a fiber diameter of 2.5 denier and a unit weight of 60g / m² is selected as the substrate, and the composition is impregnated into the substrate using a microwave-assisted impregnation process (frequency 2.45GHz, power density 8W / g, treatment time 30 seconds), and the liquid content is controlled to be 220% of the weight of the substrate. Finally, the packaged wet wipes are 60 Co irradiation sterilization, the dose is 12kGy.

[0116] Embodiment 3:

[0117] This embodiment provides an anti-stratification makeup remover wet wipe composition, and its components, measured by weight percentage, include:

[0118] The oil phase has a total amount of 10.00%, and the oil phase is composed of the following components: 5.00% PEG-7 glyceryl cocoate (accounting for 50% of the weight of the oil phase) and 2.50% PEG-6 caprylic / capric glycerides (accounting for 25% of the weight of the oil phase), and the weight ratio of the two is 2:1 (the hydrophilic modified oil accounts for 75% of the weight of the oil phase); and a light natural source oil composed of 1.25% jojoba oil (accounting for 12.5% ​​of the weight of the oil phase), 0.417% grape seed oil (accounting for about 4.17% of the weight of the oil phase), 0.417% sunflower seed oil (accounting for about 4.17% of the weight of the oil phase, the weight ratio of sunflower seed oil to macadamia oil is 1:1) and 0.416% macadamia oil (accounting for about 4.16% of the weight of the oil phase), and the light natural source oil accounts for 25% of the weight of the oil phase, wherein the weight ratio of jojoba oil:grape seed oil:(sunflower seed oil+macadamia oil) is about 3:1:1;

[0119] Polysaccharide stabilizer, total amount 0.425%, including: xanthan gum 0.30% and gellan gum 0.125%;

[0120] Carbomer 980, dosage: 0.125%;

[0121] Surfactants, total amount: 9.75%, including 82.5% (i.e., 8.044% of the total weight of the composition) of non-ionic surfactants and 17.5% (i.e., 1.706% of the total weight of the composition) of zwitterionic surfactants based on the total weight of the surfactants; the non-ionic surfactants are composed of decyl glucoside (APG) 5.118% (52.5% of the surfactant weight), PEG-40 hydrogenated castor oil 0.853% (8.75% of the surfactant weight), and polysorbate-20 2.073% (21.25% of the surfactant weight), and the weight ratio of the three is approximately 6:1:2.5; the zwitterionic surfactant is cocamidopropyl betaine (CAPB) 1.706%;

[0122] Electrolytes, total amount: 0.55%, which is a mixture of sodium chloride 0.43% and sodium citrate 0.12%, and the weight ratio of the two is approximately 3.5:1;

[0123] Active skin care ingredients, total amount: 1.05%, which are vitamin E 0.35%, sodium hyaluronate 0.35%, and panthenol 0.35%;

[0124] pH regulator (citric acid / NaOH) q.s., used to adjust the final pH to 5.8;

[0125] Deionized water, added to 100%.

[0126] The preparation method of the composition is as follows:

[0127] S1. Heat the deionized water to 35°C, add materials in sequence under stirring at 350 rpm, and stir for 15 minutes;

[0128] S2. Premix the oil phase evenly and heat it to 45°C, then slowly add it to the water phase in S1, and start the double-layer stirring paddle for staged mixing:

[0129] S21. The first stage: the upper turbine paddle rotates at 1000 rpm, the lower anchor paddle rotates at 300 rpm, and stir for 10 minutes;

[0130] S22. The second stage: the upper turbine paddle speed is reduced to 450 rpm, the lower anchor paddle speed is reduced to 100 rpm, and continue to stir for 15 minutes;

[0131] S3. Add a pH regulator to adjust the pH to 5.8, and then homogenize the liquid material under a pressure of 15 MPa using a high-pressure homogenizer. The homogenized liquid material is vacuum degassed at a pressure of -0.09 MPa for 8 minutes. Select a PE / PET bicomponent spunbond non-woven fabric with a fiber diameter of 1.8 denier and a unit weight of 50 g / m² as the substrate, and impregnate the composition into the substrate using a microwave-assisted impregnation process (frequency 2.45 GHz, power density 6.5 W / g, treatment time 45 seconds), controlling the liquid content to be 200% of the weight of the substrate. Finally, the packaged wet wipe products are irradiated and sterilized at a dose of 11 kGy.

[0132] Comparative Example 1:

[0133] Compared with the formulation of Example 3, the difference lies in that: it does not contain xanthan gum and gellan gum (i.e., the addition amount of polysaccharide stabilizer is 0). The contents of the remaining components are adjusted accordingly so that the total is 100% (mainly the content of water increases). The preparation process is exactly the same as that of Example 3.

[0134] Comparative Example 2:

[0135] The formulation is exactly the same as that of Example 3. The difference in the preparation process from Example 3 lies in that:

[0136] In step S2, a single standard turbine stirrer paddle is used for mixing. After the oil phase is added to the water phase, it is stirred at a constant speed of 1000 rpm for 25 minutes (i.e., the total time of S21 + S22).

[0137] In step S3, no vacuum degassing treatment is carried out, and microwave-assisted impregnation is not used. Instead, a conventional impregnation method (such as spraying or soaking) is used. The remaining steps (pH adjustment, homogenization, sterilization, substrate selection, liquid content control) are the same as those in Example 3.

[0138] Comparative Example 3:

[0139] The formulation is basically the same as that of Example 3, and the difference lies in the oil phase composition:

[0140] The total amount of the oil phase is still 10.00%.

[0141] The oil phase composition is modified to: only use 10.00% of mineral oil; or use 2.00% of PEG-7 glyceryl cocoate (accounting for 20% of the oil phase), 2.00% of PEG-6 caprylic / capric glyceride (accounting for 20% of the oil phase) (hydrophilic oil accounts for 40% of the oil phase), 3.00% of jojoba oil (accounting for 30% of the oil phase), 1.00% of grape seed oil (accounting for 10% of the oil phase), 1.00% of sunflower seed oil (accounting for 10% of the oil phase), and 1.00% of macadamia oil (accounting for 10% of the oil phase) (natural oil accounts for 60% of the oil phase). That is, the ratio of hydrophilic modified oils and light natural source oils does not meet the required range of the present invention.

[0142] The contents of other components are the same as those in Example 3 (the amount of water is adjusted accordingly). The preparation process is exactly the same as that in Example 3.

[0143] Experimental data and effect proof

[0144] In order to demonstrate the beneficial effects of the technical solution of the present invention, relevant performance tests were conducted on the makeup remover wet wipes samples prepared in the above Examples 1-3 and Comparative Examples 1-3, and the results are summarized in the following Table 1:

[0145]

[0146] From the test results in Table 1, we can see that:

[0147] Stability: Examples 1, 2, and 3 all showed excellent physical stability under various storage conditions and accelerated tests (centrifugation), and no oil-water stratification occurred. However, Comparative Example 1 (lacking the key polysaccharide stabilizer) and Comparative Example 3 (the oil phase composition did not meet the requirements) quickly showed serious stratification, proving the key role of the specific formula combination of the present invention in achieving the anti-stratification effect. Although Comparative Example 2 (using conventional stirring process) has acceptable short-term stability at room temperature and low temperature, it has slight oil separation under high temperature storage, and the unoptimized stirring may result in poor long-term stability compared to the process of the present invention.

[0148] Makeup removal effect: Examples 1, 2, and 3 all exhibited efficient makeup removal capabilities. Due to the stratification of Comparative Examples 1 and 3, their makeup removal effects could not be guaranteed or were difficult to effectively evaluate. Comparative Example 2 had a makeup removal effect comparable to that of Example 3 due to the same formula and short-term stability.

[0149] Sensory evaluation: The skin feel of Examples 1, 2, and 3 was evaluated as refreshing, non-sticky, and good. Comparative Examples 1 and 3 had very poor use feel due to stratification.

[0150] Process advantages: Compared with Example 3, Comparative Example 2 (without vacuum degassing and microwave-assisted impregnation) has significantly higher bubble content in its products, and the penetration depth of the liquid in the wet wipe substrate is significantly reduced. This proves that the vacuum degassing process adopted in the present invention can effectively remove bubbles, improve the product appearance and uniformity; the microwave-assisted impregnation process can significantly improve the liquid penetration efficiency and depth, ensuring the consistency of the overall performance of the wet wipes.

[0151] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-stratification makeup remover wet wipe, characterized in that: include Wet wipes substrate, The composition impregnated on the wet wipe substrate comprises the following components by weight percentage: Aqueous phase: balance; Oil phase: 5%-15%, composed of the following components: Hydrophilic modified oil, accounting for 60%-90% of the weight of the oil phase, selected from PEG-7 glyceryl cocoate and PEG-6 caprylic capric glyceride; A light natural oil, accounting for 10% to 40% by weight of the oil phase, selected from jojoba oil, grape seed oil, sunflower seed oil and macadamia oil; Polysaccharide stabilizer: 0.1%-0.7%; Carbomer: 0.05%-0.2%; Surfactants: 1.5%-18%, including: A nonionic surfactant, accounting for 70% to 95% of the total weight of the surfactant, selected from decyl glucoside, PEG-40 hydrogenated castor oil, and polysorbate-20; The zwitterionic surfactant, which accounts for 5% to 30% of the total weight of the surfactant, is cocamidopropyl betaine; Electrolyte: 0.3%-0.8%, at least one selected from sodium chloride and sodium citrate; Active skin care ingredients: 0.1%-2%, at least one selected from vitamin E, hyaluronic acid, and panthenol; pH adjuster: an amount used to adjust the pH value of the composition to be stable at 4.5-7.0; The total weight percentage of each component is 100%.

2. The anti-stratification makeup remover wet wipes according to claim 1, characterized in that: The polysaccharide stabilizer includes xanthan gum and gellan gum, The content of xanthan gum is 0.1%-0.5%; The content of gellan gum is 0.05%-0.2%.

3. The anti-stratification makeup remover wet wipes according to claim 2, characterized in that: The hydrophilic modified oil is a mixture of PEG-7 glyceryl cocoate and PEG-6 caprylic capric glyceride, and the weight ratio of the two is 1:1-4:

1.

4. The anti-stratification makeup remover wet wipes according to claim 3, characterized in that: The light natural source oil consists of jojoba oil, grape seed oil and sunflower seed oil, and the weight ratio of the three is 2:1:1-4:1:

1.

5. The anti-stratification makeup remover wet wipes according to claim 3, characterized in that: The nonionic surfactant consists of decyl glucoside, PEG-40 hydrogenated castor oil and polysorbate-20, and the weight ratio of the three is 5:1:2 to 7:1:

3.

6. The anti-stratification makeup remover wet wipes according to claim 3, characterized in that: The electrolyte is a mixture of sodium chloride and sodium citrate, and the weight ratio of the two is 2:1-5:

1.

7. A method for preparing the makeup removing wet wipes according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Heat the water phase to 30-40°C, add polysaccharide stabilizer, carbomer, surfactant, electrolyte and active skin care ingredients in sequence, and stir at 200-500 rpm for 10-20 minutes; S2. Heat the oil phase to 40-50°C and slowly add it to the water phase, using a double-layer stirring paddle to mix in stages: S21, first stage: upper paddle 800-1200rpm, lower paddle 200-400rpm, stirring for 5-15 minutes; S22, second stage: the upper paddle is reduced to 300-600 rpm, the lower paddle is adjusted to 50-150 rpm, and stirring is performed for 10-20 minutes; S3. Add pH regulator to adjust pH to 5.0-6.5, and soak the wet wipes substrate after homogenization. The liquid content is 180%-220% of the weight of the substrate.

8. The method for preparing a makeup removing wet wipe according to claim 7, characterized in that: The homogenization treatment pressure is 12-18 MPa, and the wet wipes are sterilized by 60Co-γ ray irradiation with a dosage of 10-12 kGy.

9. The method for preparing a makeup removing wet wipe according to claim 8, characterized in that: The wet wipes substrate is a hydrophilically modified bicomponent spunbonded nonwoven fabric, the fiber diameter of which is 1.2-2.5 denier and the unit weight is 40-60 g / m².

10. The method for preparing a makeup removing wet wipe according to claim 8, characterized in that: After the homogenization process in step S3, the following steps are also included: The vacuum degassing process is used to degas for 5-10 minutes at a pressure of -0.08MPa to -0.1MPa, and the volume proportion of bubbles in the composition is controlled to be ≤0.5%; The wet wipes substrate was treated with a microwave-assisted impregnation process at a frequency of 2.45 GHz and a power density of 5-8 W / g for 30-60 seconds, so that the composition penetrated to a depth of 80%-95% of the thickness of the substrate.

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