Facial mask containing electret with strong electrostatic field and preparation method of facial mask

Abstract

The invention relates to a mask containing an electret with a strong electrostatic field and a preparation method of the mask, and belongs to the technical field of mask products, the mask comprises a protective layer, an electret layer, a waterproof layer and a skin-friendly layer which are sequentially compounded, the protective layer is a polyolefin film layer, and the electret layer is an organic polymer polarized material film layer subjected to polarization treatment; the skin-friendly layer is a fiber cloth layer with biocompatibility, and the skin-friendly layer and the protective layer form a closed structure to wrap the electret layer. The electret electrostatic mask capable of storing static electricity is prepared by utilizing the electricity storage performance of the electret and a multi-layer composite process technology and is matched with various beautifying and skin care essences for use, skin absorption of substances can be effectively promoted through an electrostatic field and micro-current, the skin care effect is achieved, and no allergy phenomenon exists.

Description

Technical Field

[0001] The present invention relates to the technical field of facial masks, and mainly to a facial mask containing an electret with a strong electrostatic field and a preparation method thereof, which can effectively achieve the effects of promoting repair, anti-aging, whitening and removing spots, and replenishing water and moisturizing when matched with different types of beauty essences. Background Art

[0002] With the changes in my country's population structure and the growth of economic strength, the main consumer groups have gradually strengthened their awareness of facial skin care. In recent years, the consumption of facial masks has shown an increasing trend year by year. As a daily skin care product, facial masks mainly cover the face for a short period of time (about 20-30 minutes) to replenish the skin's stratum corneum with moisture, moisturizers or other nutrients contained in the mask essence to achieve skin care. At present, the facial mask products sold on the market generally include: facial mask cloth and essences with different beauty effects carried on the facial mask cloth, which play a beauty effect after being applied to the facial skin. According to the matrix material of the mask cloth, it can be divided into non-woven fabric masks, silk masks, hydrogel masks and cellulose masks. At present, the matrix material and efficacy of the mask cloth are still research hotspots to meet the daily needs of consumer groups. Among them, the commonly used facial mask cloths are mostly single-layer non-woven fabric structures.

[0003] However, the stratum corneum of human skin is very dense. Ordinary facial mask essences are only outside the stratum corneum of the skin and rarely penetrate into the skin, so they cannot really exert the effect of essences. Some facial mask essences have added chemical penetration-promoting ingredients to enhance the penetration of substances, but because they are mostly ketone or amide organic compounds, they may cause side effects such as skin irritation or allergies. Therefore, it is urgent to find other effective ways to better solve the beauty effect of essences on the skin. Summary of the invention

[0004] In view of this, the present invention provides a facial mask containing an electret with a strong electrostatic field and a preparation method thereof. The facial mask provided by the present invention can effectively promote the skin's absorption of beauty and skin care essence substances and play a role in maintaining the skin.

[0005] At present, the main claimed effects of common facial mask products on the market are cleansing, moisturizing, soothing, firming, whitening and wrinkle removal. However, the effects of facial mask products vary. The main shortcomings of these products are: some facial mask products have insufficient penetration of effective substances, some cosmetics contain chemical penetration-promoting substances that may cause allergies or skin damage, and long-term facial mask application can easily cause bacterial growth. The specific analysis is as follows:

[0006] One is that the natural barrier of the stratum corneum hinders the effective penetration of nutrients in the product. Human skin mainly consists of the epidermis, dermis, subcutaneous tissue and appendages. The stratum corneum, the outermost layer of the epidermis, is composed of 10-20 layers of flat keratinized cells without cell nuclei. It has a dense structure and complex layers. It is the most important natural protective barrier for the human face. It is difficult for nutrients in the mask to penetrate to the stratum corneum and below the granular layer, and rarely can it nourish the cells in need. This is the main reason for the uneven effects of current mask products.

[0007] The second is that some cosmetics contain chemicals that may cause skin allergies or damage if used for a long time. In order to enhance the absorption of nutrients into the skin, facial masks may add many hydrating ingredients, which may cause a short-term increase in skin hydration, break the balance of the stratum corneum or make it thinner, and damage the skin barrier structure. In addition, some facial mask products contain certain aromatic ingredients that have adverse effects on the skin, or even damage it, which may cause people to have allergic reactions when using them.

[0008] The third is that facial masks are rich in nutrients, and long-term facial masks may cause bacterial growth. After using facial masks on the face, some essence will generally remain. These residual nutrients are the best "nutrient pool" for bacteria, which may cause bacterial growth and cause a huge burden on the skin.

[0009] Electret is a type of dielectric material that has the function of carrying electric charge. It has electrostatic field effect and microcurrent. Among them, the electret carrying negative charge can effectively regulate cell migration, loosen the structure of the epidermal stratum corneum, and open the transport channel for penetration substances. It also has the effect of inhibiting bacterial growth and can be widely used in the field of beauty and skin care. At present, most of the electret electrostatic treatment films sold on the market are single-layer electret materials. They use the characteristics of the electret itself to directly attach to the skin for use, which can assist in the treatment of tissues and relieve pain. However, its electric field potential can only reach about -300V, and it carries a small amount of charge and is not easy to preserve.

[0010] In addition, the electronic skin mask available on the market mainly provides microcurrent through an introduction instrument to promote the penetration of the mask essence. Such products not only require additional power supply equipment, but also have complicated operation and are expensive. In the electret mask and preparation method for promoting the absorption of phytoestrogens announced in Chinese patent literature (CN111991259 A), the electret mask includes an electret layer and a mask drug layer, and the two layers of film need to be packaged independently. When used, the mask drug layer is first applied, and then the electret layer is applied on the mask drug layer. However, the electret application is faced with the problem of easy loss of charge. The charge stored in the high molecular polymer after electret polarization treatment is easily lost when it contacts humid air or conductive essence liquid, thereby losing the electrostatic field effect. Therefore, there is a lack of a mature electret electrostatic mask product on the market.

[0011] The present invention provides a facial mask containing an electret with a strong electrostatic field, which comprises a protective layer, an electret layer, a waterproof layer and a skin-friendly layer which are compounded in sequence, wherein the protective layer is a polyolefin film layer, the electret layer is a polarized organic polymer polarized material film layer; the skin-friendly layer is a fiber cloth layer with biocompatibility, and forms a closed structure with the protective layer to wrap the electret layer.

[0012] The facial mask provided by the present invention can effectively promote the absorption of beauty and skin care essence substances by the skin, thereby playing a role in maintaining the skin.

[0013] See also Figure 1 , Figure 1 Schematic diagram of the structure of a facial mask containing electret in some embodiments of the present invention. Figure 1 In the figure, 1 is a protective layer, 2 is an electret layer, 3 is a waterproof layer, and 4 is a skin-friendly layer.

[0014] The mask containing an electret with a strong electrostatic field described in the embodiment of the present invention can be referred to as an electret electrostatic mask, which is mainly composed of four thin layers of materials, namely a protective layer 1, an electret layer 2, a waterproof layer 3 and a skin-friendly layer 4. Among them, the protective layer 1 is a polyolefin film layer, which mainly plays the role of support and dustproof, and is preferably a polyethylene (PE) material film or a polyethylene non-woven fabric layer (such as a melt-blown non-woven fabric commonly used in the field of beauty and skin care), and more preferably a PE fiber cloth layer, which can be 10-15μm thick and is soft and breathable. The upper surface (non-composite surface) of the protective layer can also have a unique creative or eye-catching and attractive decorative pattern, and the present invention has no special restrictions.

[0015] In the embodiment of the present invention, the electret layer 2 is a polarized organic polymer polarized material film layer, preferably a film layer of a polytetrafluoroethylene film polarized by corona charging; it can be combined with the protective layer 1 by an adhesive. The embodiment of the present invention utilizes organic polymer film polarized materials such as polytetrafluoroethylene, and performs electret polarization treatment, thereby forming a mask cloth with an electrostatic field effect and carrying a microcurrent; utilizing the physical effects of the electrostatic field and microcurrent, in combination with essences with different cosmetic effects, the skin penetration of the mask essence solution is enhanced by effectively loosening the stratum corneum, thereby providing the cosmetic effect of the mask, and since it mainly relies on the action of physical factors, there is no allergic effect.

[0016] The organic polymer membrane polarization material mainly includes fluorinated ethylene propylene film and polytetrafluoroethylene film, preferably polytetrafluoroethylene film, which is a film product made of polytetrafluoroethylene (PTFE). The embodiment of the present invention can use commercially available organic polymer polarization material membranes. If PTFE is a porous material, the pore size is 0.1-0.3 microns, the porosity is 80%, and the strength is moderate. It can also be a film material with a thickness of generally 10 to 50 μm, wherein the preferred thickness is 15 to 20 μm.

[0017] The polarization treatment is preferably a corona charging method, which utilizes the corona discharge formed by the local breakdown of the air caused by the non-uniform electric field at the tip to deposit the generated charged particles on the polymer, so that the polymer carries the charge. This is a commonly used electret polarization treatment method. In a specific embodiment, the vertical distance between the charging brush and the polytetrafluoroethylene film material is 5 cm, the charging voltage is set to 15 kV, the charging time is 10 minutes, and after charging, the potential on its surface can be measured to be -1000 V.

[0018] In an embodiment of the present invention, the waterproof layer 3 covers the electret layer 2, and its film material has similar polymer properties to the electret layer and has certain hydrophobic properties, that is, a polytetrafluoroethylene film or other hydrophobic polymer material can be used, preferably a polytetrafluoroethylene hydrophobic film. Preferably, the thickness of the waterproof layer is between 10 μm and 30 μm, more preferably 15 to 25 μm. Alternatively, preferably, the polytetrafluoroethylene film after expansion treatment is preferably used, and the thickness of the waterproof layer is between 10 μm and 30 μm, more preferably 15 to 25 μm.

[0019] In an embodiment of the present invention, the skin-friendly layer 4 is a fiber cloth layer with biocompatibility, and forms a closed structure with the protective layer 1 to wrap the electret layer 2; the skin-friendly layer 4 covers the waterproof layer 3, and its non-composite surface is used to be applied to the user's skin surface. The skin-friendly layer is made of a non-allergenic, air-permeable and highly water-absorbent flexible sheet material, mainly a biological fiber cloth material such as a silk fiber cloth layer or a plant fiber cloth layer; it is preferably a silk fiber membrane cloth with strong water absorption. In addition, the composite method of the waterproof layer and the skin-friendly layer can be the same as the above method.

[0020] After the four layers of materials in the embodiment of the present invention are combined, the overall thickness of the mask is in the range of 100 microns to 150 microns, and the density is about 2.8-3.5 g / cm 3 The facial mask product described in the embodiment of the present invention may only be the facial mask cloth of the composite layer structure, and the shape is consistent with the conventional facial mask cloth, such as the whole face shape, the upper and lower face shape, the ear-hanging face shape and other forms; it may also be matched with independently packaged beauty and skin care essence substances, such as a variety of effective essence solutions, wherein the pH value is 4.5-7.5, the viscosity is between 11.5-13.5PA.s, the adhesion is good, and it has good cold and heat resistance and other characteristics, including: hydrating and repairing, whitening, anti-aging and anti-wrinkle and other effective solutions.

[0021] Accordingly, the present invention provides a method for preparing a facial mask containing an electret having a strong electrostatic field as described above, comprising:

[0022] The polyolefin film is compounded with the organic polymer polarizing material film by using an adhesive;

[0023] The non-composite surface of the organic polymer polar material film is subjected to polarization treatment by using a corona charging device to form an electret layer;

[0024] The waterproof layer and the biocompatible fiber cloth layer are compounded and wrapped in the electret layer in sequence to obtain the mask (cloth) containing the electret with a strong electrostatic field. According to the designed face shape of the mask, it is divided into a whole face shape or an upper and lower half face shape, and the shape of the mask is determined by cutting between the knife molds.

[0025] The embodiment of the present invention discloses a method for preparing an electret electrostatic facial mask, which is mainly prepared by compounding four layers of materials, namely, a protective layer, an electret layer, a waterproof layer and a skin-friendly layer. The protective layer can be a PE material cloth or a non-woven fabric, and can also be decorated with attractive or creative patterns; the electret layer mainly uses a polytetrafluoroethylene film, which is polarized by corona charging; the waterproof layer can use a polytetrafluoroethylene film or other hydrophobic polymer materials; the skin-friendly layer uses a non-allergenic, air-permeable and highly absorbent material, specifically a biofiber cloth (including plant fiber cloth, silk fiber cloth).

[0026] The process and steps of this preparation scheme preferably include: first, select PE material fiber cloth, which has a thickness of 10-15 microns, is soft and breathable, can be sprayed with decorative patterns or patterns on the outer surface, and is compounded with the electret layer using an adhesive. The other side of the electret layer film (organic polymer polarized material film) is polarized using a corona charging device, and the vertical distance between the charging electrostatic rod and the electret layer is preferably 5cm, the charging voltage can be 15kV, and the surface potential is measured using an electrometer at about -1000V. The electret layer has a strong static reserve; other corona polarization treatment process parameters can also be used. Subsequently, the waterproof layer and the skin-friendly layer are compounded in a similar manner as described above, and the entire compound is performed after completing the other layers of electret polarization.

[0027] It should be noted that, the adhesive compound is preferably PUR polyurethane hot melt adhesive, which will not melt again after curing, has a fast curing speed and strong adhesion.

[0028] The electret electrostatic mask cloth prepared in the embodiment of the present invention and the beauty and skin care essence solution are packaged separately; when using, squeeze the middle gap of the package (such as Figure 2 As shown in the figure, squeeze the beauty and skin care essence solution onto the skin-friendly layer of the electret electrostatic mask, completely immerse in the essence solution for 3-5 minutes, tear open the sealed bag to take out the mask, apply it directly on the face for 15-20 minutes, and finally remove it to complete skin care. The electret electrostatic mask cloth prepared in the embodiment of the present invention can be used with a variety of effective essence solutions, including: moisturizing and repairing, whitening, anti-aging and wrinkle removal, etc.

[0029] In the present invention, an electret electrostatic mask with static electricity storage is prepared by utilizing the electret electricity storage performance and multi-layer composite process technology. When used in conjunction with a variety of beauty and skin care essences, the electrostatic field and microcurrent can effectively promote the skin absorption of substances, play a role in skin care, and there is no allergic reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of a facial mask containing an electret in some embodiments of the present invention;

[0031] Figure 2 Schematic diagram of facial mask product packaging according to some embodiments of the present invention;

[0032] Figure 3 These are the results of cell migration experiments on some facial mask products according to the embodiments of the present invention. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0034] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention. The reagents and materials described in the following examples, unless otherwise specified, can be obtained from commercial sources.

[0035] Example 1

[0036] The invention discloses a method for preparing an electret electrostatic facial mask, which is mainly prepared by compounding four layers of materials, which are a decorative protective layer, an electret layer, a waterproof layer and a skin-friendly layer in sequence. The protective layer is a PE material cloth with a thickness of 10 microns and a decorative pattern sprayed on the surface; it is compounded with the electret layer by an adhesive (using PUR polyurethane hot melt adhesive). The electret layer uses a polytetrafluoroethylene film with a thickness of 20 microns, moderate tensile strength, and a soft and smooth film. After passing through a corona device, the vertical distance between the charging electrostatic rod and the electret layer is 5 cm, and the charging voltage is 15kV. The film is charged for 10 minutes and polarized; the waterproof layer uses a polytetrafluoroethylene film with a thickness of 20 microns; the skin-friendly layer uses a silk fiber cloth. The waterproof layer and the skin-friendly layer are compounded in a similar manner as described above, and then integrally compounded with other layers that have completed electret polarization.

[0037] Select the upper and lower face-shaped die cutters to cut the membrane cloth. The overall thickness of the finished electret electrostatic mask is about 120 microns, the surface potential is -1000V, the composite peel strength is 1.2Kgf / cm, the adhesion strength is good, and the density is about 3.0g / cm 3 .

[0038] Some existing electret applications face the problems of carrying a small amount of charge, being difficult to preserve, and easy loss of charge. However, the electret electrostatic mask described in the present application carries a surface potential of -1000V and is not easy to lose.

[0039] The prepared electret electrostatic mask cloth and functional essence solution are packaged separately. When using, squeeze the middle gap forcefully, squeeze the functional essence solution onto one side of the electret electrostatic mask cloth, completely immerse it in the essence solution for 3-5 minutes, tear open the sealed bag to take out the mask, apply it directly on the face for 15-20 minutes, and finally remove it to complete the skin care.

[0040] Example 2

[0041] The invention discloses a method for preparing an electret electrostatic mask, which is mainly prepared by compounding four layers of materials, namely, a decorative protective layer, an electret layer, a waterproof layer and a skin-friendly layer. The selected protective layer is a common non-woven fabric, on which attractive patterns are decorated; the electret layer is charged by a polytetrafluoroethylene film with a thickness of 15 microns through a corona device, and the vertical distance between the charging electrostatic rod and the electret layer is 10 cm, and the voltage is charged at 20kV for 15 minutes, so that its surface potential is -1100V. The waterproof layer is made of a polytetrafluoroethylene film after expansion treatment, with a thickness of 15 microns and strong air permeability and hydrophobicity; the skin-friendly layer is made of silk fiber cloth. PUR polyurethane hot melt adhesive is used to compound each layer, and after completion, the overall face shape is selected, and the mask is prepared by die cutting.

[0042] The overall thickness of the completed electret electrostatic mask is about 150 microns, the surface potential is -1100V, the composite peel strength is 1.3Kgf / cm, the adhesion strength is good, and the density is about 2.8g / cm 3 .

[0043] The prepared electret electrostatic mask cloth and functional essence solution are packaged separately. When using, squeeze the middle gap with force, squeeze the functional essence solution onto one side of the electret electrostatic mask cloth, completely soak it in the essence solution for 3-5 minutes, tear open the sealed bag to take out the mask, apply it directly on the face for 15-20 minutes, and finally remove it to complete the skin care.

[0044] Cell migration test: In this example, 3T3-L1 fibroblasts in the logarithmic growth phase were selected for trypsin digestion and counting. The cell suspension was diluted to 5×10 5cell / ml, take 1ml of cell suspension and add it to a 12-well plate, and culture it in a cell culture incubator overnight. After 24h of cell attachment, scratch it with a 20μl gun tip, add serum-free culture medium, cover it with a control substance (ordinary mask cloth without electret) or the sample of Example 1 (electret electrostatic mask), and culture it in an incubator. At 0 hours after the scratching and 24 hours after the scratching, take out the well plate and take pictures under a fluorescent inverted microscope. The results suggest (such as Figure 3 As shown in the figure, compared with the control group, the migration of 3T3-L1 cells in the sample group (containing the electret electrostatic mask) was more obvious after 24 hours of action, indicating that the electret electrostatic mask is conducive to the migration of fibroblasts. Combined with essences with different beauty effects, it is helpful for skin repair.

[0045] Example 3

[0046] (1) Human safety testing of electret electrostatic masks

[0047] According to the test method described in the "Technical Specifications for Safety of Cosmetics" (2015 edition), this test recruited 18 volunteers, including 10 males and 8 females, aged between 22 and 36 years old, and divided them into a test group (the electret electrostatic mask containing essence solution was applied, and the mask prepared in Example 1 was selected (hereinafter, Example 1 is used as the test sample), in which the essence solution contains niacinamide, sodium hyaluronate, lemon fruit extract and glycerin as main ingredients, and has moisturizing and whitening effects), and the other group is a control group (just apply a blank spot test container). Select an area not exceeding 50mm 2 , a qualified spot test device with a depth of about 1mm. Place the test substance into the spot test device. Apply the spot test device with the test substance and negative control to the curved side of the subject's forearm, and remove the spot test device after 24 hours. Observe the skin reaction according to the standards in Table 1 30 minutes (after the indentation disappears), 24 hours and 48 hours after removing the test substance spot test device, and record the observation results.

[0048] Table 1 Skin reaction grading standards for skin occlusive patch test

[0049]

[0050] The test results are as follows:

[0051] Table 2 Skin occlusive patch test results

[0052]

[0053]

[0054] The test results showed that the 18 subjects scored 0 at 0.5h, 24h, and 48h after removing the test article spot tester, indicating no adverse reactions.

[0055] (2) Skin moisture content after using the electret electrostatic mask

[0056] This study recruited 16 subjects, including 8 males and 8 females, aged between 25 and 35 years old, and divided them into 2 groups, 8 in each group. 1. Sample group, using electret electrostatic mask; 2. Control group, using ordinary non-woven mask. Test period and frequency of use: 28 days of testing, once a day, and Corneometer CM825 testing on the 0th, 14th, and 28th days.

[0057] Before the experiment, clean your face and use the mask normally. The mask itself contains moisture and essence, and has moisturizing and whitening effects. No need to add extra water. The structure of ordinary non-woven mask is the same as that of electret electrostatic film mask, with only a single layer of non-woven fabric, and it is also divided into upper and lower face shapes. It can absorb essence, but does not carry any charge.

[0058] The test results are as follows:

[0059] Table 3 Descriptive statistics of moisture content of skin stratum corneum

[0060]

[0061] Compared with before using the samples, after using the samples for 14 days, the moisture content of the stratum corneum of the skin on the cheeks of the 8 sample group subjects increased by 13.80%, and the moisture content of the stratum corneum of the skin on the cheeks of the 8 control group subjects increased by 5.82%.

[0062] Compared with before using the samples, after using the samples for 28 days, the moisture content of the stratum corneum of the skin on the cheeks of the 8 sample group subjects increased by 22.80%, and the moisture content of the stratum corneum of the skin on the cheeks of the 8 control group subjects increased by 7.66%.

[0063] The test results show that the moisture content of the skin stratum corneum of the 8 sample group subjects was more significantly improved after using the test substance compared to the control group.

[0064] (3) Skin wrinkle effect test after using electret electrostatic mask

[0065] This trial recruited 20 subjects, including 12 males and 8 females, aged between 22 and 35 years old, divided into 2 groups, 10 people in each group. 1. Sample group, using electret electrostatic mask; 2. Control group, using ordinary non-woven mask. Test cycle and frequency of use: The test lasted for 28 days, used once a day, and the instrument Primos test was performed on the 0th, 14th, and 28th days. On the 0th, 14th, and 28th days, the subjects cleaned their faces with cleansing products and wiped their skin with dry facial tissues. After sitting in a laboratory at a temperature of 21±1℃ and 50±10%RH for 30 minutes, the laboratory technician tested the skin wrinkle volume on the fixed area of ​​the subject's facial skin. The results are as follows:

[0066] Table 4 Descriptive statistics of skin wrinkle volume

[0067]

[0068] Compared with before using the samples, after using the samples for 14 days, the volume of skin wrinkles on the cheeks of 10 subjects in the sample group decreased by 6.25%, and the volume of skin wrinkles on the cheeks of 10 subjects in the control group decreased by 1.50%.

[0069] Compared with before using the samples, after using the samples for 28 days, the volume of skin wrinkles on the cheeks of 10 subjects in the sample group decreased by 16.58%, and the volume of skin wrinkles on the cheeks of 10 subjects in the control group decreased by 4.29%.

[0070] The test results show that the 10 subjects in the sample group had a more significant reduction in skin wrinkle volume after using the test substance compared to the control group.

[0071] (4) Skin whitening efficacy test after use of electret electrostatic mask

[0072] This trial recruited 12 subjects, including 6 males and 6 females, aged between 22 and 35 years old, and divided them into 2 groups, 6 people in each group. 1. Sample group, using electret electrostatic mask; 2. Control group, using ordinary non-woven mask. Test cycle and frequency of use: 28 days of testing, once a day, instrument Colorimeter CL400 detection on the 0th, 14th, and 28th days, on the 0th, 14th, and 28th days, the subjects cleaned their faces with cleansing products and wiped their skin with dry facial tissues. After sitting in a laboratory at a temperature of 21±1℃ and 50±10%RH for 30 minutes, the laboratory technician tested the skin whitening of the fixed area of ​​the subject's face skin.

[0073] The results are as follows:

[0074] Table 5 Descriptive statistics of skin whiteness L*

[0075]

[0076] Compared with before using the samples, after using the samples for 14 days, the skin whitening of the cheeks of the 6 sample group subjects increased by 2.97%, and the skin whitening of the cheeks of the 6 control group subjects increased by 0.85%.

[0077] Compared with before using the samples, after using the samples for 28 days, the skin whitening of the cheeks of the 6 sample group subjects increased by 4.45%, and the skin whitening of the cheeks of the 6 control group subjects increased by 1.58%.

[0078] The test results show that the 6 sample group subjects had a more obvious improvement in skin whitening after using the test substance compared to the control group.

[0079] It can be seen from the above embodiments that the embodiments of the present invention utilize organic polymer film polarization materials such as polytetrafluoroethylene, and perform electret polarization treatment to form a mask cloth with an electrostatic field effect and carrying a microcurrent; utilizing the physical effects of the electrostatic field and the microcurrent, in combination with essences with different cosmetic effects, the skin penetration of the mask essence solution is enhanced by effectively loosening the stratum corneum, thereby providing the cosmetic effect of the mask, and because it mainly relies on the action of physical factors, there is no allergic effect. The mask cloth containing an electret with a strong electrostatic field prepared by the present invention, when used with different types of cosmetic essences, can effectively achieve the effects of promoting repair, anti-aging, whitening and lightening, and moisturizing, has stable performance, is easy to use, and is suitable for promotion and application.

[0080] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A facial mask containing an electret having a strong electrostatic field, characterized in that: The invention comprises a protective layer, an electret layer, a waterproof layer and a skin-friendly layer which are compounded in sequence. The protective layer is a polyolefin film layer, the electret layer is a polarized organic polymer polarized material film layer; the skin-friendly layer is a biocompatible fiber cloth layer, and forms a closed structure with the protective layer to wrap the electret layer.

2. The facial mask containing an electret having a strong electrostatic field according to claim 1, characterized in that: The electret layer is a film layer formed by polarizing the polytetrafluoroethylene film through corona charging.

3. The facial mask containing an electret having a strong electrostatic field according to claim 1, characterized in that: The waterproof layer is a polytetrafluoroethylene hydrophobic film layer.

4. The facial mask containing an electret having a strong electrostatic field according to claim 1, characterized in that: The skin-friendly layer is selected from a silk fiber cloth layer or a plant fiber cloth layer.

5. The facial mask containing an electret having a strong electrostatic field according to claim 1, characterized in that: The protective layer is a polyethylene film or a polyethylene non-woven fabric layer.

6. The facial mask containing an electret having a strong electrostatic field according to any one of claims 1 to 5, characterized in that: The non-composite surface of the protective layer also has a decorative pattern.

7. The facial mask containing an electret having a strong electrostatic field according to any one of claims 1 to 5, characterized in that: The facial mask is also matched with independently packaged beauty and skin care essence substances.

8. A method for preparing a facial mask containing an electret having a strong electrostatic field as claimed in any one of claims 1 to 5, comprising: The polyolefin film is compounded with the organic polymer polarizing material film by using an adhesive; The non-composite surface of the organic polymer polar material film is subjected to polarization treatment by using a corona charging device to form an electret layer; The waterproof layer and the biocompatible fiber cloth layer are compounded in sequence and wrapped with the electret layer to obtain the facial mask containing the electret with a strong electrostatic field.

9. The method for preparing a facial mask according to claim 8, characterized in that: The thickness of the polyolefin film is 10-15 microns; The vertical distance between the charging electrostatic rod in the corona charging device and the non-composite surface of the organic polymer material film is 5-10 cm, the charging voltage is 15-20 kV, and the charging time is 10-15 min.

10. The method for preparing a facial mask according to claim 8, characterized in that: The non-composite surface of the polyolefin film is also spray-printed with a decorative pattern; The facial mask is also matched with independently packaged beauty and skin care essence substances.

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