Face covering

Abstract

The utility model relates to a facial covering, such as a facial mask, which comprises a sheet layer capable of being directly or indirectly attached to a human face, the sheet layer is provided with a first side face deviating from the direction of the human face and a second side face facing the direction of the human face, and the facial covering is characterized in that the sheet layer is provided with one or more structure missing parts formed by material missing; the structure loss part formed by material loss comprises at least one of one or more closed gaps between the first side face and the second side face and one or more recesses on the first side face and / or the second side face, wherein the bottoms of the recesses are partially or completely closed by materials.

Description

Technical Field

[0001] The utility model relates to a facial covering, including facial masks, local patches such as eye patches, face masks such as sunscreen face masks or facial mask covers, etc. Background Art

[0002] Facial coverings such as facial masks, local patches such as eye patches, face masks such as sunscreen face masks or facial mask covers, etc. are common beauty and skin care or maintenance products. The facial covering particularly includes facial masks, and the facial masks include various forms such as facial mask sheets, clay masks, sleeping masks, lifting masks, etc.

[0003] The most widely used is the facial mask sheet, which is usually made of non-woven fabric, tencel and other materials soaked with facial mask essence, and is applied on the face to promote the absorption of facial mask essence. Since the facial mask essence has good fluidity, the film carrier often cannot completely adsorb the liquid, and under the action of gravity, part of the facial mask essence often detaches from the film carrier, polluting clothes and also causing waste of essence. At the same time, the film usually does not fit well with the face, especially when soaked with facial mask essence, it is easy to slip off. In order to maintain the fit of the facial mask sheet, the user usually cannot make large-scale expressions (such as laughing, chewing, etc.), which causes inconvenience in use. In addition, since the moisture in the facial mask essence is easy to volatilize, the facial mask will become dry after being used for a period of time, affecting the absorption of essence substances, which also results in a reduction in skin care efficiency.

[0004] There are accessories such as facial mask covers on the market, which can help the facial mask sheet fit the skin better, reduce the risk of dripping of facial mask liquid and polluting clothes, etc., and improve the skin care efficiency and experience.

[0005] However, the facial structures of people vary greatly. Although the commercially available facial mask covers are provided with a variety of size options, they still cannot achieve differential customization, so that the fit with the face during use is still not good. If it is too large, the lifting effect on the face is not good; if it is too small, the wearing comfort of the user is relatively low, and it is difficult to achieve refined detail control. In addition, the current commercially available face masks such as silicone face masks have a relatively single appearance, limited functions, and low aesthetic degree. Summary of the Utility Model

[0006] In view of the above situation of the prior art, the utility model provides a soft facial covering, which can be a beauty and skin care product such as a facial mask, a local patch such as an eye patch, a face mask such as a sunscreen face mask or a facial mask cover, etc.

[0007] The facial covering can have good face shape fit, wearing comfort, and can easily realize various patterns and designs and contribute to weight reduction, improving the aesthetic degree and recognition while meeting the functional application.

[0008] Furthermore, the facial covering of the present utility model can also help slow down the drying of the mask material or the excessive volatilization of the essence during use, improve the absorption efficiency of the essence and the skin care effect, especially having a good moisturizing effect.

[0009] In addition, the facial covering also has the effect of lifting the skin. The facial covering still has good mechanical property stability after being used multiple times, is firm and durable, and thus can be washed and reused.

[0010] Therefore, a first aspect of the present utility model relates to a facial covering, which comprises a sheet layer that can be directly or indirectly attached to a human face. The sheet layer has a first side facing away from the human face and a second side facing towards the human face, and is characterized in that the sheet layer has one or more structural missing parts formed by the lack of material, and the structural missing parts formed by the lack of material include at least one of the following:

[0011] one or more closed voids between the first side and the second side, and

[0012] one or more depressions on the first side or the second side and having the bottom partially or completely closed by material.

[0013] Therefore, according to the present utility model, the structural missing part can include the void, or the depression, or both the void and the depression.

[0014] A second aspect of the present utility model relates to a set of products, which includes the facial covering according to the present utility model and beauty skin care products different from the facial covering, such as facial masks, mud masks, moisturizing creams or essence.

[0015] According to an advantageous embodiment of the facial covering, the sheet layer has one or more protrusions formed by the addition of material on the first side and / or the second side.

[0016] According to an advantageous embodiment of the facial covering, the facial covering or its sheet layer is made of silicone.

[0017] According to an advantageous embodiment of the facial covering, the sheet layer has only one or more depressions on its first side.

[0018] The sheet layer of the facial covering according to the present utility model can have, for example, at least 5, 10, 80, 100, 1000, 5000, 30000 or 500000 of the said "voids" or "depressions".

[0019] According to the present invention, the "lack of material" or "increase of material" refers to the amount of material in the part or area being less or more than the amount of material around it. In the present invention, the "structural missing portion formed by lack of material" includes a depression, a gap or a through hole as defined in the context, but does not include the hollow portion.

[0020] According to the utility model, the "sheet" is understood to be a planar or film-like sheet having the first side and the second side. Those skilled in the art understand that the average thickness value between the two sides of such a planar or film-like sheet is much smaller than the average length or width of the side. However, the thickness of such a sheet may be uniform or uneven, that is, thicker in some parts of the sheet and thinner in other parts. The sheet itself may be in the form of a plane, an arc surface or a three-dimensional curved surface to fit the human face or a part of the human face. For example, when the sheet is made using a method such as 3D printing technology or molding technology, it may be a three-dimensional curved membrane corresponding to at least a part of the human face structure. Alternatively, the sheet may also be a flat plane membrane.

[0021] According to the present invention, the "first side" is the side facing away from the human face, that is, the side facing the external environment, and can also be called the outer side; and the "second side" is the side facing the human face or directly in contact with the human face, and can also be called the inner side.

[0022] According to the present invention, the "void" means that the face covering has one or more closed cells without material between the first and second sides of the sheet and in the inner space defined by the thickness. The periphery of the cell is closed by the material of the sheet, thus forming a closed void. The interior of the void can be filled with gas such as air. The void can be evenly or unevenly distributed in the sheet layer.

[0023] According to the utility model, the "recess" refers to a recessed or sunken groove or basin-shaped portion without material on the first or second side of the face cover, and the bottom of the recessed groove or basin-shaped portion may be partially or completely closed by material. More specifically, the recess on the first side may be open toward the first side and at least partially closed toward the second side, and the recess on the second side may be open toward the second side and at least partially closed toward the first side. "At least partially closed" means that the bottom of the recess may be completely or partially closed by material. In one embodiment, the bottom of a single recess may have, for example, at least 1%, 2%, 3% or 5% or 10% or 20% of its area closed by material, based on the area of the entire recess bottom.

[0024] The depression is opposite to the protrusion described below, and is lower than the reference plane of the first or second side surface in the thickness direction. The depressions can be evenly or unevenly distributed on the sheet layer.

[0025] In one embodiment, a structural defect formed by material deficiency may include a through-hole that directly penetrates the sheet and connects two sides, and when viewed from any direction of these two sides, there is no part of the channel blocked or closed by material.

[0026] The voids, depressions, or possible through-holes formed by the material deficiency itself may have any cross-sectional shape, including triangles, quadrilaterals, hexagons, various irregular shapes, etc., or combinations thereof. For example, the interior of the facial covering may be composed of a network of voids formed by multiple material deficiencies. Due to the existence of such voids and / or depressions, the material of the facial covering of the present utility model can be saved, the breathability can be significantly improved, while being lighter and more aesthetically pleasing. Advantageously, the overall filling degree of the facial covering or sheet layer of the present utility model may be less than 100%, such as less than 99% or 98%, or at least 95%, 90%, 80%, or 70%, etc. Here, the "filling degree" is also referred to as the "filling density", and can be defined as the volume of a sheet layer having one or more structural defects formed by material deficiency, such as the voids, through-holes, and / or depressions (when referring to the filling degree of a printed layer, it refers to a single printed layer) divided by the volume of an ideal sheet layer without the structural defects formed by material deficiency (i.e., a sheet layer or printed layer that fills the through-holes and voids or fills the depressions) as a percentage. When preparing a sheet layer using methods such as 3D printing, the overall filling degree of the sheet layer can be determined by the filling degree of each printed layer that constitutes the sheet layer itself.

[0027] In the present utility model, the size and dimensions of the structural defects formed by the material deficiency, such as voids, through-holes, or depressions themselves, may not be particularly limited. However, in an advantageous embodiment, the structural defects, such as voids, through-holes, or depressions, have a maximum cross-sectional area of 0.01 - 100 mm 2 、preferably 0.04 - 20 mm 2 、for example 0.1 - 9 mm 2 、for example 0.2 - 5 mm 2 、for example 0.1 - 2 mm 2 In another advantageous embodiment, the structural defects, such as voids, through-holes, or depressions, have a maximum cross-sectional area greater than 100 mm 2 、for example greater than 200 mm 2 、for example 400 - 40000 mm 2 、for example 500 - 20000 mm 2 、for example 600 - 10000 mm 2 of the maximum cross-sectional area.

[0028] In the present utility model, the maximum cross-sectional area related to the void or depression refers to the area of the largest one among the numerous cross-sections of the void or depression in the direction parallel to the first side or the second side.

[0029] According to the present utility model, the "protrusion formed by material addition" refers to the protruding part that is higher than the side surface formed by material accumulation on the first and / or second side surfaces of the sheet, and is opposite to the depression described above in terms of height. The protrusion on the first side surface extends away from the first side surface and the protrusion on the second side surface extends away from the second side surface. Such a protruding part (protrusion) can have any size and dimension. In an advantageous embodiment, the protruding part with material addition is used to form a pattern on the side surface.

[0030] Advantageously, the sheet layer of the facial covering can have a plurality of relatively large hollowed-out parts penetrating the sheet layer. These hollowed-out parts include, for example, a first hollowed-out part corresponding to the user's eyes, a second hollowed-out part corresponding to the nose, a third hollowed-out part corresponding to the mouth, and / or a fourth hollowed-out part for hanging the ears. Here, the hollowed-out parts are specifically designed large-sized openings corresponding to all or part of the eyes, nose, and mouth. Therefore, the hollowed-out parts are deliberately designed large-area blank regions on the sheet layer, and they constitute the boundaries of the macroscopic geometric shape of the sheet layer itself. These hollowed-out parts do not belong to the structural missing parts formed by material shortage described above.

[0031] According to an advantageous embodiment of the present utility model, the facial covering or the sheet layer can have a pattern. The pattern can preferably be formed by at least one of the structural missing parts such as depressions, through holes, voids, as well as protrusions and hollowed-out parts. The formed pattern can be of any shape and form, including any logo, trademark, pattern, texture, and graphic such as scenery, plants, figures, or animals, etc.

[0032] In a preferred embodiment, only the first side surface of the sheet layer of the facial covering according to the present utility model has the structural missing part formed by material shortage or the protrusion.

[0033] In another preferred embodiment, the second side surface of the sheet layer of the facial covering according to the present utility model is flat, and preferably does not have the depression or protrusion described above. More preferably, the second side surface is a printed layer with a filling degree of 100%.

[0034] When the facial covering is used as a facial mask or a local patch, the second side can be directly applied to the face, thereby directly contacting the face or the essence applied to the face. When the facial covering is used as a facial mask cover, the second side can face another facial mask or local patch, such as a facial mask sheet or a clay mask, and optionally contact them. The inner facial mask can be a traditional facial mask, including non-woven facial masks, silk facial masks, biocellulose gel sheets, tencel facial masks, fruit fiber facial masks, etc. The advantage is to reduce the volatilization of the essence in the facial mask and help fix the facial mask.

[0035] In the present utility model, the sheet layer of the facial covering can be made of silicone. The silicone material is a thermosetting silicone composition, including a hydrosilylation-curing silicone composition, a condensation-curing silicone composition, a photocuring silicone composition, etc.

[0036] In addition, the facial covering according to the present utility model can be designed according to ergonomics. Advantageously, the facial covering can be designed as a full-face ear-type, locally fixed, or non-fixed type, or can also be designed as a local facial mask, such as a facial mask specifically applied to the eyes or other parts. According to a preferred embodiment of the present utility model, the facial covering can have an integrally formed or additionally attached fixing mechanism for fixing the covering to the face, such as an integrally formed ear strap or an additional fixing strap such as a fixing cord.

[0037] According to the present utility model, other layers can also be provided on the first side and / or the second side of the sheet layer of the facial covering. These other layers include some functional layers such as a gel layer, an isolation layer, etc., for example, other layers that are beneficial for operation, storage, use, and maintenance. These other layers can be coatings or sheet layers made of other materials the same as or different from silicone.

[0038] In a preferred embodiment, the thickness of the facial covering can be 0.02 - 8 mm, preferably 0.1 - 5 mm, more preferably 0.2 - 3 mm, such as 0.4 - 2 mm.

[0039] The facial covering according to the present utility model has various applications. For example, when essence or maintenance liquid is applied to its second side, it can be used as a facial mask or a local patch, or when it is applied to a common facial mask product, it can be used as a facial mask cover. In addition, it can also be directly used as a face mask.

[0040] The structure of the facial covering according to the present utility model can be made of silica gel by a 3D printing process, which can be particularly preferably used. In an exemplary implementation of this process, first, a facial model is established using software according to the facial contour of the user, and the corresponding data is imported into a dedicated 3D printing processing software for data preprocessing to generate a specific format file containing 3D printing parameters. Then, it is imported into a 3D printer and scanned and printed layer by layer according to the pre-set machine state until the final completion.

[0041] In the 3D printing process, the sheet layer of the facial covering can be gradually made by stacking thinner printed layers printed layer by layer. By controlling the structure of each printed layer or its filling method, the sheet layer structure of the entire facial covering as defined and required above can be obtained.

[0042] For example, the sheet layer with the final overall filling degree (such as the filling degree described above) can be obtained by setting the same or different filling degrees of each individual printed layer. Due to the superposition of individual printed layers with the same or different filling degrees, the unique voids, depressions, or protrusion structures as described above are formed on the finally produced sheet layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 and Figure 1a are the top view and isometric sectional view of a silica gel facial covering according to the present utility model, which is a full-face ear-type facial mask and consists of two printed layers with different filling degrees.

[0044] Figure 2 and Figure 2a are the top view and isometric sectional view of another silica gel facial covering according to the present utility model, which is a full-face ear-type facial mask and consists of two printed layers with different filling degrees.

[0045] Figure 3 and Figure 3a are the top view and isometric sectional view of yet another silica gel facial covering according to the present utility model, which is a full-face ear-type facial mask and consists of three printed layers with different filling degrees.

[0046] Figure 4 and Figure 4a are the top view and sectional view of yet another silica gel facial covering according to the present utility model, which is a facial mask with a three-dimensional sheet layer that fits the facial shape. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The present utility model will be further described below in conjunction with the accompanying drawings:

[0048] As Figure 1 and 1aAs shown, it is a silicone mask printed using a silicone composition by extrusion 3D printing method. First, a full-face mask structure with ears is designed on a computer and exported as STL. The STL model is inspected and repaired. Subsequently, the STL model is imported into slicing software. The total thickness of the mask layer to be printed is determined to be 0.4 mm, and each printed layer is 0.2 mm thick. Both printed layers are printed in a continuous and repeating quadrilateral form that constitutes a network, with filling degrees of 80% and 95% respectively, to form the required mask. The total filling degree of the obtained mask sheet is less than 95%, and it has visible hollow parts a and depressions b with closed or completely closed bottoms on it.

[0049] Finally, the printed silicone mask sample is placed in an oven at 120 °C and heated and cured for 10 min to complete the curing and forming.

[0050] As Figure 2 and 2a shown, the sheet layer is composed of a first layer filled with solid (100%) and a second layer with a filling degree of 90%. First, a full-face mask structure with ears is designed on a computer and exported as STL. The STL model is inspected and repaired. Subsequently, the STL model is imported into slicing software. The total thickness of the mask layer to be printed is determined to be 0.4 mm, and each printed layer is 0.2 mm thick. The first layer is a 100% filled layer without structural defects where material is missing, while the second layer is printed in a continuous and repeating quadrilateral form that constitutes a network, with a filling degree of 90%, to form the required mask. The total filling degree of the obtained mask sheet is less than 100%, and it has a hollow part a and a depression b with a completely closed bottom visible to the naked eye on it.

[0051] Finally, the printed silicone mask sample is placed in an oven at 120 °C and heated and cured for 10 min to complete the curing and forming.

[0052] As Figure 3 and 3a shown, the sheet layer is composed of a first layer filled with solid (100%), a second layer with a filling degree of 90%, and a third layer filled with solid (100%). First, a full-face mask structure with ears is designed on a computer and exported as STL. The STL model is inspected and repaired. Subsequently, the STL model is imported into slicing software. The total thickness of the mask layer to be printed is determined to be 0.6 mm, and each printed layer is 0.2 mm thick. The first layer and the third layer are 100% filled layers without structural defects where material is missing, while the second layer is printed in a continuous and repeating quadrilateral form that constitutes a network, with a filling degree of 90%, to form the required mask. The total filling degree of the obtained mask sheet is less than 100%, and it has a hollow part a and multiple closed voids c inside.

[0053] Finally, the printed silicone mask sample is placed in an oven at 120 °C and heated and cured for 10 min to complete the curing and forming.

[0054] As Figure 4 and 4a shown, the facial mask is composed of a three-dimensional sheet layer structure. First, a three-dimensional scanner is used to obtain the facial data of a human face. The 3D facial mask entity structure is designed on a computer and exported as an STL. The STL model is inspected and repaired. Subsequently, the STL model is imported into slicing software to determine the placement position, and the structural dimensions and shapes of the missing parts of the internal material of the 3D facial mask are controlled by the filling ratio. In this embodiment, a double-sided sandwich design is adopted, that is, the outermost printing layer (corresponding to the first side and the second side) is 100% solid filling, and each intermediate printing layer has a filling degree of 90%, and the filling shape is a quadrilateral. Each printing layer is 0.2 mm thick, and a printing file is exported. The obtained 3D facial mask structure is directly printed and formed by an S300 printer. The printer has two extrusion heads and can print two materials, Figure 4a wherein 1 is the main silicone material and 2 is the water-soluble support material.

[0055] Finally, the printed 3D silicone facial mask sample is placed in an oven at 120 °C and heated and cured for 10 min to complete the curing and forming. The support is removed by washing with water, and finally a three-dimensional 3D facial mask is directly obtained, which has at least a plurality of closed voids c inside.

[0056] Test Example

[0057] Testing process : Under the conditions of 23 °C and 64% relative humidity, the cut 3D-printed silicone film is covered on the skin for a test of the fit and moisture retention. The skin area to be tested is the inner skin of the forearm of the arm. The materials used for testing are the BioHope Five-Dimensional Hydrating Gold Film (hereinafter referred to as the facial mask) and the Winona Moisturizing Cream (hereinafter referred to as the moisturizing cream).

[0058] The silicone films to be tested are as follows:

[0059] Film A structure: First, a full-face ear-containing facial mask structure is designed on a computer and exported as an STL. The STL model is inspected and repaired. Subsequently, the STL model is imported into slicing software, and the total thickness of the facial mask layer to be printed is determined to be 0.4 mm, and each printing layer is 0.2 mm thick. Among them, the first layer and the second layer are both designed with a filling degree of 75%, and then directly extruded and printed. The test sample is denoted as "75% ○". This sample does not have the structural missing parts such as the depressions or voids defined in the present invention.

[0060] Structure of Membrane B: First, design a full-face ear-inclusive mask structure on the computer and export it as an STL file. Check and repair the STL model. Subsequently, import the STL model into slicing software, determine that the total thickness of the mask layer to be printed is 0.4 mm, and the thickness of each printed layer is 0.2 mm. Among them, the first layer is designed with 100% filling degree, the second layer is designed with 75% filling degree, and then directly extruded for printing. During testing, the porous layer faces outward (i.e., this porous layer is the first side facing away from the human face with multiple depressions while the second side has no depressions), and the sample is denoted as "10075 - porous side out".

[0061] Structure of Membrane C: First, design a full-face ear-inclusive mask structure on the computer and export it as an STL file. Check and repair the STL model. Subsequently, import the STL model into slicing software, determine that the total thickness of the mask layer to be printed is 0.4 mm, and the thickness of each printed layer is 0.2 mm. Among them, the first layer is designed with 75% filling degree, the second layer is designed with 100% filling degree, directly extruded for printing. During testing, the porous layer faces the inner side of the skin (i.e., this porous layer is the second side facing the human face), and the sample is denoted as "10075 - porous side in".

[0062] 1. Fit experiment

[0063] 1.1 Cover a circular facial mask with a diameter of 2.1 cm on the test skin, cover the above-mentioned facial mask with a circular 3D silicone film with a diameter of 2.1 cm cut out, and then twist the arm 90° twice to observe the fit of the 3D silicone film.

[0064] Fit: It refers to the degree of fit between the silicone film, the facial mask, and the skin. After twisting the arm 90° twice, observe the gap situation between the silicone film, the facial mask, and the skin. The larger the gap area, the worse the fit.

[0065] Test results: "10075 - porous side out" is better than "10075 - porous side in", and "10075 - porous side in" is slightly better than "75% ○".

[0066] 1.2 Apply 0.05 g of moisturizing cream in a circular motion on the skin in a circular area with a diameter of 2.1 cm, cover the above-mentioned test skin smeared with moisturizing cream with a circular 3D silicone film with a diameter of 2.1 cm cut out, and then twist the arm 90° twice to observe the fit of the 3D silicone film.

[0067] Fit: It refers to the degree of fit between the silicone film and the skin smeared with moisturizing cream. After twisting the arm 90° twice, observe the fit situation between the silicone film and the skin smeared with moisturizing cream. The larger the gap area, the worse the fit.

[0068] Test results: "10075 - pores facing outward" is better than "10075 - pores facing inward", and "10075 - pores facing inward" is slightly better than "75% ○".

[0069] 2 Moisturizing

[0070] 2.1 Cover the test skin with a circular facial mask with a diameter of 2.1 cm, cover the above facial mask with a circular 3D silicone film with a diameter of 2.1 cm cut out, and use the Delfin Moisture Meter SC device to measure the water content of the skin stratum corneum at specific times.

[0071] Measure the water content of the skin stratum corneum of the skin without applying the facial mask and without covering the silicone film (referred to as "before use") and 30 minutes after applying the facial mask and covering the silicone film (referred to as "30 minutes") respectively. The reference value is the water content of the stratum corneum at different corresponding times when only the facial mask is applied without using the silicone film. Δ water content of stratum corneum % (30 minutes) = (water content of stratum corneum at 30 minutes - water content of stratum corneum before use) / water content of stratum corneum before use × 100%.

[0072] The obtained water content and Δ water content of stratum corneum results are shown in the following table:

[0073] Table 1: Test results of facial masks (water content of stratum corneum)

[0074]

[0075] Table 2: Test results of facial masks (Δ water content of stratum corneum)

[0076]

[0077] The higher the Δ water content of stratum corneum %, the better the moisturizing effect.

[0078] Moisturizing effect: "10075 - pores facing outward" > "10075 - pores facing inward" > "75% ○".

[0079] 2.2 Apply 0.05 g of moisturizing cream in a circular motion on the skin in a circular area with a diameter of 2.1 cm, cover the above test skin with the applied moisturizing cream with a circular 3D silicone film with a diameter of 2.1 cm cut out, and use the Delfin Moisture Meter SC device to measure the water content of the skin stratum corneum at specific times.

[0080] The water content of the stratum corneum of the skin was measured separately before applying the moisturizing cream and without covering it with a silicone film (hereinafter referred to as "before use") and 30 minutes after applying the moisturizing cream and covering it with a silicone film (hereinafter referred to as "30 minutes"). The reference value was the water content of the stratum corneum at different corresponding times when only the moisturizing cream was applied without using the silicone film. Δ water content of stratum corneum % (30 minutes) = (water content of stratum corneum at 30 minutes - water content of stratum corneum before use) / water content of stratum corneum before use × 100%.

[0081] The obtained water content and the results of Δ water content of stratum corneum are shown in the following table:

[0082] Table 3: Test results of the moisturizing cream (water content of stratum corneum)

[0083]

[0084] Table 4: Test results of the moisturizing cream (Δ water content of stratum corneum)

[0085]

[0086] The higher the Δ water content of stratum corneum %, the better the moisturizing effect.

[0087] Moisturizing effect: "10075 - porous outwards" > "10075 - porous inwards" > "75% ○"

[0088] The above are only the preferred embodiments of the present utility model, and its structure is not limited to the shapes listed above. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A facial covering, comprising a sheet layer that can be directly or indirectly attached to a human face, the sheet layer having a first side facing away from the human face and a second side facing towards the human face, characterized in that, The sheet has one or more structural deficiencies formed by material lack, and the structural deficiencies formed by material lack include at least one of the following: One or more enclosed voids between the first side face and the second side face, and One or more depressions on the first side face or the second side face and having the bottom partially or completely enclosed by material.

2. The facial covering according to claim 1, characterized in that, The sheet has one or more protrusions formed by material addition on the first side face or the second side face.

3. The facial covering according to claim 1 or 2, characterized in that, The facial covering is a facial mask, a topical patch, a face mask or a facial mask cover.

4. The facial covering according to claim 1 or 2, characterized in that, The facial covering or the sheet has a pattern formed by at least one of the structural deficiencies, the protrusions and the hollowed portions.

5. The facial covering according to claim 1 or 2, characterized in that, The sheet is in the form of a plane, a curved surface or a three-dimensional curved surface.

6. The facial covering according to claim 1 or 2, characterized in that, The sheet has a first hollowed portion corresponding to the user's eyes, a second hollowed portion corresponding to the nose, a third hollowed portion corresponding to the mouth and / or a fourth hollowed portion for ear hanging.

7. The facial covering according to claim 1 or 2, characterized in that, The sheet has a total filling degree of less than 100%.

8. The facial covering according to claim 1 or 2, characterized in that, The void or depression has a maximum cross-sectional area of 0.01 - 100 mm 2 .

9. The facial covering according to claim 1 or 2, characterized in that, The sheet is made by a 3D printing method.

10. The facial covering according to claim 1 or 2, characterized in that, At least 1% of the area of the bottom of a single depression is enclosed by material, based on the area of the entire bottom of the depression.

11. The facial covering according to claim 1 or 2, characterized in that, The sheet only has one or more of the structural deficiencies or protrusions on its first side face, while the second side face is flat.

12. The facial covering according to claim 11, wherein The second side face is a printed layer with a filling degree of 100%.

13. The facial covering according to claim 1 or 2, characterized in that, The void or depression has a maximum cross-sectional area greater than 100 mm 2 .

14. The facial covering according to claim 1 or 2, characterized in that, The facial covering or the sheet is made of silica gel.

15. The facial covering according to claim 1 or 2, characterized in that, A gel layer, an isolation layer or a coating is further provided on the first side face and / or the second side face of the sheet of the facial covering.

16. The facial covering according to claim 1 or 2, characterized in that, The facial covering is non-fixed or has an integrally formed or additional fixing mechanism for fixing the covering to the face.

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