JP7094775B2 - Face mask - Google Patents

Description

The present invention relates to a face mask that is easy to handle when wet and has excellent adhesion to the skin and a feeling of wearing.

Conventionally, cellulose fiber non-woven fabric has been widely used as a face mask for beauty. For example, a regenerated cellulose continuous long fiber non-woven fabric, which is made by webizing a cuprammonium rayon stock solution by a flow tension method, self-adhering the fibers at the time of webizing, and then patterning by a water flow entanglement treatment, has low chemical and physical irritation and transparency. Is high. For example, see Patent Document 1 below. Further, a face mask (see, for example, Patent Documents 2 and 3 below), which is easy to unfold at the time of use depending on how to fold it, has also been developed.

Japanese Unexamined Patent Publication No. 2015-70968 Japanese Unexamined Patent Publication No. 2011-015706 Japanese Unexamined Patent Publication No. 2006-042981

However, the development of a face mask with better usability, whose demand has been expanding in recent years, has not been sufficient, and there are the following problems.
(1) It is difficult to spread the face mask sheet in a wet state.
(2) It takes time to put on the spread face mask on the face.
(3) When the above-mentioned handleability is improved, the adhesion to the skin when wet is lowered.
(4) In order to eliminate the above-mentioned handleability, there is a face mask using a support (film), but waste increases.
(5) When one face mask sheet with a low basis weight is folded, put in a bag and filled with liquid cosmetics, the sheet bends in the bag.

In view of the above-mentioned problems of the prior art, an object to be solved by the present invention is to provide a face mask which is easy to handle when wet and has excellent adhesion to the skin and a feeling of wearing.

As a result of diligent research and experiments to solve the above problems, the present inventor has optimized the physical properties and folding method of the face mask sheet, especially when wet, to improve the handleability when wet and to the skin. Unexpectedly, a face mask having excellent adhesion and wearing feeling was found, and the present invention was completed.

That is, the present invention is as follows.
[1] A face mask having a cellulose fiber non-woven fabric.
The following features (A) to (D):
(A) The WET 10% modulus of the face mask is left-right direction ≥ up-down direction;
(B) The WET elongation of the face mask under a 1N load in the left-right direction is 0.40% or more;
(C) The face mask is first folded up and down;
(D) The face mask is folded a total of 3 times or more;
Has a face mask.
[2] The face mask according to the above aspect 1, which does not have a support.
[3] The face mask according to the above aspect 1 or 2, wherein the cellulose fiber nonwoven fabric has a basis weight of 10 g / m ² or more and 60 g / m ² or less.
[4] The face mask according to any one of the above aspects 1 to 3, wherein the cellulose fiber nonwoven fabric is a continuous length fiber nonwoven fabric.
[5] The face mask according to any one of the above aspects 1 to 4, which comprises 100 parts by mass of the cellulose fiber nonwoven fabric and 100 parts by mass or more and 3500 parts by mass or less of the liquid cosmetics impregnated in the cellulose fiber nonwoven fabric.

Since the face mask according to the present invention has high handleability when wet, for example, it is possible to shorten the time until the face mask sheet is taken out from the bag and attached to the face, and further, when the face mask is attached. It also has excellent adhesion to the skin and a feeling of wearing.

It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining the folding method of the face mask which concerns on one aspect of this invention. It is a figure explaining how to fold a comparative face mask. It is a figure explaining how to fold a comparative face mask.

Hereinafter, embodiments of the present invention (hereinafter, also referred to as the present embodiment) will be described in detail, but the present invention is not limited to these embodiments. Further, each characteristic value of the present disclosure means a value measured by a method described in the [Examples] section of the present disclosure or a method understood by those skilled in the art to be equivalent thereto, unless otherwise specified. Regarding the face mask, "WET" means a state in which the cellulose fiber non-woven fabric is impregnated with water to the extent that it begins to drip.

The face mask of this embodiment has a cellulose fiber non-woven fabric. In the face mask, the present inventor has a great influence on the adhesion to the skin and the wearing feeling, especially in the left-right direction of the face mask (in the present disclosure, the "left-right direction" and the "up-down direction" of the face mask are defined as. When the face mask is applied to the face, it means the directions corresponding to the left-right direction and the up-down direction of the face.) Normally, the face mask is in a wet state (typically, liquid cosmetics and the like). Because it is applied to the face while holding the vicinity of the left and right ends by hand, it is easily deformed in the left-right direction. It was found that it is effective to control the physical properties of the face mask, especially in the left-right direction, in order to improve the handleability of the face mask. Further, when the face mask whose physical properties are controlled as described above is provided in a wet state and in a folded form, the present inventor further has a viewpoint of achieving both handleability when wet, adhesion to the skin, and a feeling of wearing. We have found that certain folding modes are advantageous.

The face mask according to the present embodiment contains a cellulose fiber non-woven fabric, and (1) the lateral modulus of the face mask is controlled so as not to be smaller than the vertical modulus in a wet state (2). ) The elongation in the left-right direction of the face mask is properly controlled in a wet state, (3) the face mask is folded in such a manner that excessive stress is not applied in the left-right direction when the face mask is unfolded. (4) By folding the face mask in such a manner as to prevent twisting before use, it is possible to highly achieve both handleability when wet, adhesion to the skin, and a feeling of wearing. ..

Cellulose fiber The cellulose fiber constituting the non-woven fabric is not particularly limited, and is limited to recycled cellulose fiber such as copper ammonia rayon, viscose rayon and polynosic, solvent cellulose (purified cellulose) fiber such as tencel (lyocell), and cotton and pulp. Examples thereof include natural cellulose fibers derived from hemp and the like. Regenerated cellulose fibers and solvent cellulose fibers are preferable from the viewpoints of liquid absorption, adhesion to the skin, and transparency. Cellulose fibers may be continuous long fibers or short fibers, but continuous long fibers have less physical irritation than short fibers, have excellent adhesion to the skin, and have excellent liquid diffusivity.

The average fiber diameter of the cellulose fibers of the present embodiment is preferably 1.0 μm or more and 20.0 μm or less, more preferably 2.0 μm or more and 18.0 μm or less, and further preferably 4.0 μm or more and 15.5 μm or less. When the average fiber diameter is 1.0 μm or more, the number of fibers does not become too large in order to maintain the handleability in wet condition, and when the transparency in wet condition is good and 20.0 μm or less, it is applied to the skin. Adhesion is good.

Cellulose fiber nonwoven fabrics to which a binder and / or a surfactant is added are concerned about deterioration of liquid absorbency and elution of components, and therefore, cellulose fiber nonwoven fabrics substantially free of binders and surfactants are preferable.

The texture of the cellulose fiber nonwoven fabric of the present embodiment is preferably 10 g / m ² or more and 60 g / m ² or less, more preferably 20 g / m ² or more and 60 g / m ² or less, and further preferably 20 g / m ² or more. It is 50 g / m ² or less. When the basis weight of the cellulose fiber nonwoven fabric is 10 g / m ² or more, the nonwoven fabric is not too thin, so that the nonwoven fabric sheet can be formed well, and when it is 60 g / m ² or less, the handling is excellent and the transparency and adhesion are also good. Is held in.

The thickness of the cellulose fiber nonwoven fabric of the present embodiment is preferably 0.10 mm or more and 0.80 mm or less, more preferably 0.15 mm or more and 0.65 mm or less, and further preferably 0.20 mm or more and 0.50 mm or less. be. When the thickness of the cellulose fiber nonwoven fabric is 0.10 mm or more, the nonwoven fabric is not too thin, so that it is easy to handle, and twisting is unlikely to occur when the nonwoven fabric sheet is filled with liquid cosmetics. On the other hand, when the thickness is 0.80 mm or less, the transparency and the adhesion to the skin are good, and repulsion is less likely to occur during the folding process.

The water absorption ratio of the cellulose fiber nonwoven fabric of the present embodiment is preferably 8 times or more and 20 times or less, more preferably 9 times or more and 16 times or less, and further preferably 10 times or more and 15 times or less. When the water absorption ratio of the cellulose fiber nonwoven fabric is 8 times or more, the holding amount of the liquid cosmetic can be increased, and the moisturizing feeling when used as a face mask is good. On the other hand, when the water absorption ratio is 20 times or less, it is possible to avoid the need for a large amount of liquid cosmetics.

The WET 10% modulus of the face mask of the present embodiment is face mask left-right direction ≧ face mask up-down direction. When the WET 10% modulus is larger in the vertical direction of the face mask than in the horizontal direction of the face mask, the handleability (particularly the handleability when wet) is lowered. In addition, the operation from unfolding the face mask to wearing it is usually performed by holding the vicinity of the left and right ends of the face mask by hand, and the force applied to the face mask tends to be large in the left-right direction. When the% modulus is smaller in the left-right direction than in the up-down direction, deformation of the eye holes, mouth holes, etc. of the face mask is likely to occur, and the area where the face mask can adhere to the skin may be small. The ratio of the WET 10% modulus in the left-right direction of the face mask to the WET 10% modulus in the vertical direction of the face mask is preferably 1.0 or more, more preferably 1.5 or more, still more preferably 2.5 or more from the above viewpoint. From the viewpoint of obtaining good followability to the unevenness of the skin when wearing the face mask, it is preferably 17.0 or less, more preferably 12.0 or less, still more preferably 10.0 or less.

The WET 10% modulus in the left-right direction of the face mask is preferably 0.5 N / 50 mm or more, more preferably 1.0 N / 50 mm, from the viewpoint of obtaining good handleability (particularly handleability when wet) and adhesion to the skin. The above is more preferably 1.2 N / 50 mm or more, and is preferably 20.0 N / 50 mm or less, more preferably 15.0 N / 50 mm or less, still more preferably 15.0 N / 50 mm or less, from the viewpoint of obtaining good followability to the unevenness of the skin. It is 10.0 N / 50 mm or less.

The vertical WET 10% modulus of the face mask is preferably 0.05 N / 50 mm or more, more preferably 0.10 N /, from the viewpoint of obtaining good handleability (particularly handleability when wet) and adhesion to the skin. It is 50 mm or more, more preferably 0.20 N / 50 mm or more, and is preferably 2000 N / 50 mm or less, more preferably 1.80 N / 50 mm or less, still more preferably, from the viewpoint of obtaining good followability to the unevenness of the skin. Is 1.50 N / 50 mm or less.

The WET elongation at 1 N load in the left-right direction of the face mask is 0.40% or more. When the WET elongation is less than 0.40%, floating may occur because it is difficult to follow the unevenness of the skin when wearing the face mask. The WET elongation is preferably 0.50% or more. On the other hand, the WET elongation is preferably 15% or less, more preferably 10% or less, from the viewpoint of obtaining good handleability (particularly handleability when wet) and adhesion to the skin.

The WET elongation at 1 N load in the vertical direction of the face mask is preferably 0.40% or more, more preferably 0.50% or more, and is handled well, from the viewpoint of good followability to the unevenness of the skin. From the viewpoint of obtaining properties (particularly handleability when wet) and adhesion to the skin, it is preferably 35% or less, more preferably 30% or less.

As a means for controlling the values of the WET 10% modulus in the left-right direction and the up-down direction, and the ratio in the left-right direction / up-down direction within the above range, the face mask is faced so that the left-right direction is the non-woven machine direction (MD direction). For example, punching out the shape of a mask. Further, as a means for controlling the values of the WET elongation under a 1 N load in the left-right direction and the up-down direction within the above range, the non-woven fabric is sewn from the net by applying air or water from the back surface of the net immediately before entering the drying process. It may be peeled off slightly.

1 to 6 are views for explaining how to fold the face mask according to one aspect of the present invention. In FIG. 1, (A) shows a state before folding, (B) shows a state after the first folding, (C) shows a state after the second folding, and (D) shows a state after the third folding. ) Shows the state before folding, (B) shows the state after the first folding, (C) shows the state after the second and third folding, and in FIG. 3, (A) shows the state before folding, (B) shows the state after the first folding and After the second folding, (C) shows the state after the third folding, in FIG. 4, (A) is before folding, (B) is after the first and second folding, and (C) is the third and The state after the fourth folding is shown. In FIG. 5, (A) is before folding, (B) is after the first and second folding, (C) is after the third folding, and (D) is the fourth folding. In FIG. 6, (A) is before folding, (B) is after the first and second folding, (C) is after the third and fourth folding, and (D) is the fifth folding. It shows the later state.

In one embodiment, as shown in FIGS. 1 to 6, the face masks 100 to 600 are first folded vertically along the folding line L1. By first folding it up and down, the upper and lower parts of the face mask are held by hand when the face mask is fully unfolded by hand, making it easy to wear on the face. Preferably, the face mask is first folded vertically in half (FIG. 1 (B), FIG. 2 (B)) or in three (FIG. 3 (B), FIG. 4 (B), FIG. 5 (B), FIG. 6). (B)) is folded. In the case of tri-folding, for example, as shown in FIGS. 3 to 6, the upper side of the two folding lines may be the first folding line L1, the lower side may be the second folding line L2, and the lower side may be 1 The second folding line may be used as the second folding line, and the upper side may be used as the second folding line, but it is more preferable that the upper side is the first folding line and the lower side is the second folding line in terms of handleability. More preferably, the face mask is first folded vertically in half. The fact that the face mask is first folded in the vertical direction means that the first folding line L1 is within the range of −45 ° to 45 ° with respect to the straight line in the horizontal direction of the face mask. It is preferably −30 ° to 30 °, and more preferably −15 ° to 15 °. If it is not folded vertically first, for example, if it is folded horizontally first, it will be unfolded left and right at the end when the folded face mask is unfolded, so force in the left and right direction. Is likely to be applied significantly, and the face mask is likely to be deformed. In the case of a symmetrical face mask, the sheets tend to be difficult to peel off from each other, so it is not desirable that the final deployment direction of the face mask is the left-right direction in which the face mask is easily deformed.

The total number of times the face mask of the present embodiment is folded (this corresponds to the total number of folding lines) is 3 times or more. If the total number of times the face mask is folded is 2 or less, twisting may occur, for example, when the face mask is placed in a bag and filled with liquid cosmetics. On the other hand, when the total number of foldings is 7 or more, it tends to take time to completely unfold the folded face mask, so that the total number of foldings of the face mask is preferably 6 times or less, more preferably 5 times. Less than once. Examples of folding modes of the face mask include vertical folding (folding line L1), left / right folding (folding line L2), left / right folding (folding line L3) (total number of times 3 times), as shown in FIG. Fold up and down in half (folding line L1), fold in three left and right (folding line L2, then fold line L3) (total number of times 3 times) as shown in 2, and fold up and down in three (folding line L1, as shown in FIG. 3). Next, fold line L2), fold left and right in half (fold line L3) (total number of times 3 times), fold up and down in three (fold line L1, then fold line L2), and fold left and right in three (fold line L3, Next, folding line L4) (total number of times 4 times), vertical tri-fold (folding line L1, then folding line L2), left-right two-fold (folding line L3), left-right two-fold (folding line L4), as shown in FIG. (Total number of times 4 times), as shown in FIG. 6, vertical tri-fold (folding line L1, then folding line L2), left and right tri-fold (folding line L3, then folding line L4), vertical double folding (folding line L5) (Total number of times 5 times).

The face mask of this embodiment preferably has no support. When a support is used, the liquid cosmetics that the face mask sheet should hold tend to adhere to the support and the moisturizing property of the face mask to the skin tends to deteriorate. It is also preferable not to use a support in terms of avoiding environmental pollution due to an increase in waste.

The cellulose fiber nonwoven fabric of the present embodiment can be produced, for example, by a method in which the spun yarn is shaken off on a net, laminated in a sheet shape, entangled with a water flow, and subjected to a drying step. As a preferable example of the method for producing the cellulose fiber nonwoven fabric of the present embodiment, for example, the nonwoven fabric may be slightly peeled off from the net by applying air or water from the back surface of the net immediately before entering the drying step. According to this manufacturing method, good elongation when wet in the MD direction can be obtained by drying the non-woven fabric in a state where the tension applied in the mechanical direction (MD direction) is slightly increased. The reason is not clear, but it is considered that the elongation of the yarn itself forming the non-woven fabric increased due to the slightly tense and dry state. Using the cellulose fiber non-woven fabric obtained by this manufacturing method, the face mask manufactured so that the MD direction is the left-right direction is equal to or higher than the face mask manufactured so that the CD direction is the left-right direction. It can give good adhesion and a better fit.

The face mask of the present embodiment includes a cellulose fiber nonwoven fabric and a liquid cosmetic impregnated therein. In the present disclosure, the "liquid cosmetic" includes all cosmetics containing a liquid cosmetic ingredient, and may be a liquid substance having a relatively low viscosity, or may be in the form of a gel, for example. .. The amount of the liquid cosmetic is preferably 100 parts by mass or more, more preferably 500 parts by mass or more, still more preferably 1000 parts by mass or more with respect to 100 parts by mass of the cellulose fiber non-woven fabric, and is preferable from the viewpoint of ease of production. Is 3500 parts by mass or less, more preferably 3000 parts by mass or less, still more preferably 2100 parts by mass or less.

Hereinafter, embodiments of the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
First, the measurement methods used in Examples and Comparative Examples are shown below. When the cellulose fiber non-woven fabric constituting the face mask was already moistened with liquid cosmetics or the like, sampling was performed after washing with pure water and drying on a net.

(1) Metsuke (g / m ² )
A 5 cm × 5 cm cellulose fiber non ^- woven fabric is dried at 105 ° C. until it reaches a certain mass, and then left in a constant temperature room at 20 ° C. and 65% RH for 16 hours or more to measure the mass. g) was calculated.

(2) Thickness (mm)
The thickness of the cellulose fiber nonwoven fabric was measured with a load of 1.96 kPa in a thickness test conforming to JIS-L1096.

(3) Average fiber diameter (μm)
The cellulose fiber non-woven fabric was observed at a magnification of 10000 times using a scanning electron microscope and JSM-6380 manufactured by JEOL Ltd., and the average number of fiber diameters measured by selecting any 100 fibers was taken as the average fiber diameter.

(4) Water absorption magnification (times)
The cellulose fiber non-woven fabric was left in a constant temperature room at 20 ° C. and 65% RH for 16 hours or more to control the humidity. The sample was collected in a size of 5 cm × 5 cm, and the mass of the sample was measured with an electronic precision balance [A (g)]. Pure water was put in a vat and a sample was placed on a mesh (10 mesh, wire diameter 0.5 mm). The mesh on which the sample was placed was placed in a vat and immersed for 30 seconds. The mesh was raised and left for 10 minutes. The corners of the sample were pinched with tweezers, and when the water droplets did not fall, they were placed on an electronic balance and the mass was measured [B (g)]. The water absorption magnification (times) was calculated by the following formula.
Water absorption ratio = (BA) / A
The measurement was performed 5 times, and the average value was taken as the water absorption magnification (times).

(5) Liquid diffusivity (mm ² / sec)
The cellulose fiber non-woven fabric was left in a constant temperature room at 20 ° C. and 65% RH for 16 hours or more to control the humidity. The sample was collected in a size of 5 cm x 5 cm, and the test solution (pure water colored by adding 2 to 3 drops of water-based ink) was dropped from directly above the center of the sample, and 5 seconds later, the area where the test solution was diffused [C (mm ² mm 2). )] Was measured. For the measurement, the photograph taken from directly above the center was analyzed by ImageJ, and the liquid diffusivity (mm ² / sec) was calculated by the following formula.
Liquid diffusivity = C / 5
The measurement was performed 10 times, and the average value was defined as liquid diffusivity (mm ² / sec).

(6) Transparency when wet (%)
A 5 cm × 5 cm cellulose fiber non-woven fabric was placed on a mesh (10 mesh, wire diameter 0.5 mm), placed in pure water in a vat, and immersed for 30 seconds. Then, the mesh was pulled up and left for 10 minutes, and then the excess pure water was wiped off with a filter paper or the like. A non-woven fabric in a water-containing state is sandwiched between glass plates, the L value is measured 5 times using the integrating sphere SM-T manufactured by Suga Test Instruments Co., Ltd., and the number average value D is used to obtain the following equation:
Transparency when wet = 100- (DE)
The transparency (%) at the time of wetting was calculated by. At this time, the L value of only the glass plate was also measured 5 times, and the average value was defined as E.

(7) WET 10% modulus (N / 50mm)
Face masks were sampled 5 cm × 12 cm from the left-right direction and the top-down direction, respectively. In accordance with JIS L 1096, a test piece having a width of 5 cm was set in a testing machine so as to have a grasping length of 10 cm, and pure water was applied to the extent that it began to drip. Using a constant-speed elongation type tensile tester (trade name: Tensilon UCT-1t (manufactured by Orientec Co., Ltd.)), the stress when the nonwoven fabric was stretched by 10% in the stretching direction was measured. The measurement was arbitrarily performed by sampling 10 samples.

(8) WET elongation (%) under 1N load
Similar to the WET 10% modulus measurement, the elongation under 1 N load under wet conditions was measured. The measurement was arbitrarily performed by sampling 10 samples.

(9) Handleability (handler when wet) (seconds / points)
Sensory evaluation of handleability was performed on 20 subjects. The evaluation method and judgment level are as follows, and the average value of 20 persons was used as the value of the sensory evaluation of the handleability of the sample.
Evaluation method: Face mask sample folded under each condition is filled with 20 g of cosmetic solution (DHC Co., Ltd. "Dense Moisturizing Skin Toner Refreshing"), and the sample moistened in the same way as a normal face mask product is applied to the face. In the process of pasting on, the handleability was evaluated by the following four indexes.

(A) Time (seconds) until wearing the face mask
The time from touching the face mask in the bag to the completion of wearing it on the face was measured.

(B) Ease of opening the face mask (point)
The ease of unfolding the folded face mask from the time the face mask was taken out of the bag to the time immediately before it was attached to the face was evaluated according to the following criteria.
<Judgment criteria>
5: Easy to spread.
4: It gets caught a little, but it is within the allowable range.
3: It takes time, but it is acceptable.
2: It doesn't spread and is frustrating.
1: Cannot be spread. I don't want to use it.

(C) Ease of wearing the face mask (point)
The ease of wearing the face mask from the start of sticking it on the face to the completion of wearing it on the face was evaluated according to the following criteria.
<Judgment criteria>
5: Easy to install.
4: It gets caught a little, but it is within the allowable range.
3: It takes time, but it is acceptable.
2: It is hard to wear and frustrating.
1: Cannot be spread. I don't want to use it.

(D) Difficulty of deforming the face mask (point)
By confirming the deformation of the eyes and mouth after the completion of wearing the face mask and the elongation of the face mask, the difficulty of deformation was evaluated according to the following criteria.
<Judgment criteria>
5: Satisfy the following four confirmation points.
4: Satisfy the following three confirmation points.
3: Satisfy the following two confirmation points.
2: Meet one of the following confirmation points.
1: None of the following confirmation points are satisfied.
<Confirmation point>
a: There is no deformation around the eyes (the eyes are not wide open).
b: There is no deformation of the mouth (the mouth is not wide open).
c: The edge of the face mask is not twisted.
d: The face mask does not extend sideways (does not reach the ears).

(10) Adhesion (points)
A sensory evaluation of adhesion was performed on 20 subjects. The evaluation method and the judgment level are as follows, and the average value of 20 persons was used as the value of the sensory evaluation of the adhesion of the sample.
Evaluation method: A 5 cm square sample was moistened (impregnated with the amount of pure water immediately before the liquid drips) and placed on the back of the hand. The feeling of close contact after 5 minutes was evaluated according to the following criteria.
<Judgment criteria>
5: There is no peeling and the skin feels firm.
4: There is floating on the end face, but there is a feeling that the skin is firm.
3: It does not come off, but the skin does not feel tight.
2: Floating occurs on the end face, and the skin does not feel tight.
1: It floats so that it does not fit on the back of the hand, and as a result, there is no feeling of tightening.

(11) Feeling of wearing a face mask (points)
Sensory evaluation of wearing feeling was performed by 20 subjects. The evaluation method and judgment level are as follows, and the average value of 20 persons was used as the value of the sensory evaluation of the handling of the sample.
Evaluation method: Face mask sample folded under each condition is filled with 20 g of cosmetic solution (DHC Co., Ltd. "Dense Moisturizing Skin Toner Refreshing"), and the sample moistened in the same way as a normal face mask product is applied to the face. The skin irritation and moisturizing properties 20 minutes after the application were evaluated according to the following criteria.
<Judgment criteria>
5: There is no discomfort when wearing, and there is a feeling that the entire skin is moisturized during wearing.
4: I feel a smooth stimulus when wearing it, but I feel that the entire skin is moisturized during wearing.
3: I feel a smooth stimulus when wearing it, and I feel that it is moisturized except for a part of the skin during wearing.
2: I feel a tingling stimulus when wearing it, and I feel that it is moisturized except for a part of the skin during wearing.
1: There is a tingling stimulus when wearing, and there are parts of the skin that do not feel moisturized at three or more places during wearing.

(12) Amount of cosmetic liquid held by the face mask (%)
A face mask [F (g)] folded under each condition was put in a bag, and 20 g of a cosmetic solution (“Dense Moisturizing Skin Toner Refreshing” manufactured by DHC Corporation) was filled. The face mask sheet was taken out from the bag, and the mass of one wet face mask sheet was measured [G (g)]. The amount (%) of cosmetic liquid held by the face mask was calculated by the following formula:
Amount of cosmetic liquid held by the face mask = (GF) / 20 × 100
The measurement was performed 10 times, and the average value was taken as the amount of cosmetic liquid held by the face mask.

(13) Twisting face mask when filling cosmetic liquid Put a face mask folded under each condition in a bag and fill it with 20 g of cosmetic liquid (DHC Co., Ltd. "Dense Moisturizing Skin Toner Refreshing"). 20 bags were prepared. At that time, the number of twists and bends in the face mask was counted in 20 bags, and the face mask was evaluated according to the following criteria.
<Judgment criteria>
◎: No twist ○: 1 to 2 pieces twisted △: 3 to 4 pieces twisted ×: 5 or more pieces twisted

Face masks according to Examples 1 to 15 and Comparative Examples 1 to 7 were prepared by the following procedure. It should be noted that Examples 1, 7 to 14, Comparative Examples 4 and 7 have FIG. 1, Examples 2 and 15, Comparative Examples 1 and 2 have FIG. 2, Example 3 has FIG. 3, and Example 4 has FIG. 4 and Example 5. In FIG. 5, FIG. 6 in Example 6, FIG. 7 in Comparative Examples 3 and 6, and FIG. 8 in Comparative Example 5 were produced. In FIG. 7, (A) is before folding, (B) is after the first folding (folding line L1), (C) is after the second folding (folding line L2), and (D) is the third folding (folding line). The state after L3) is shown. In FIG. 8, (A) is the state before folding, (B) is the state after the first folding (folding line L1), and (C) is the state after the second folding (folding line L2). Is shown.

[Example 1]
A cotton linter (polymerization degree 900 to 1000) was dissolved in a copper ammonia solution (cotton linter 10% by mass, ammonia 7% by mass, copper 3% by mass) to prepare a spinning stock solution. A cellulose continuous long fiber web was obtained by continuously spinning on a net under a flow tension using a spinneret having a diameter of 0.6 mm and a stock solution discharge hole of 45 pieces / cm ² . After scouring the obtained cellulose continuous long fiber web, water flow entanglement was performed. After applying air from the back surface of the net, it was dried with hot air at 100 ° C. The net speed was 30 m / min. The obtained cellulose fiber nonwoven fabric had a basis weight of 38.6 g / m ² , a thickness of 0.31 mm, and an average fiber diameter of 14.3 μm.

The obtained cellulose fiber nonwoven fabric was punched into the shape of a face mask so that the left-right direction of the face mask was the nonwoven fabric machine direction (MD direction). Then, after folding the face mask sheet in half in the upper and lower halves, folding in half in the left-right direction was repeated twice. A face mask was obtained by putting the folded face mask in a bag, filling it with a cosmetic solution, and then sealing it. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 2]
A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1 except that the face mask sheet was folded in half in half, then divided into three equal parts on the left and right and folded in three from the left part. rice field. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 3]
A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was prepared under the same conditions as in Example 1 except that the face mask sheet was divided into three equal parts, folded in three from the top, and then folded in half in the left-right direction. Obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 4]
The face mask sheet is composed of a cellulose fiber non-woven fabric and a cosmetic liquid under the same conditions as in Example 1 except that the face mask sheet is divided into three equal parts vertically and then folded in three from the top, then divided into three equal parts in the left and right and folded in three from the left part. I got a face mask. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 5]
The face mask sheet was divided into three equal parts, folded in three from the top, and then folded in half in the left-right direction twice. I got a face mask. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 6]
The face mask sheet is divided into three equal parts vertically, folded in three from the top, then divided into three equal parts in the left and right, folded in three from the left part, and further folded in half in the left-right direction under the same conditions as in Example 1. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 7]
A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1 except that a spun having a diameter of 0.3 mm and a stock solution discharge hole of 180 pieces / cm ² was used. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 8]
Net speed is 22m / min. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 9]
Net speed is 18m / min. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 10]
Net speed is 40m / min. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 11]
Net speed is 77m / min. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 12]
Conducted except that the web formed from solvent-spun cellulose filaments spun using N-methylmorpholine N-oxide as a solvent was subjected to water flow entanglement, air was applied from the back surface of the net, and then dried with hot air at 100 ° C. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 13]
The cellulose continuous length fiber yarn obtained under the same conditions as in Example 1 was cut into 38 mm. After carding the obtained cut cotton, water flow entanglement treatment was performed, air was applied from the back surface of the net, and then the cotton was dried with hot air at 100 ° C. And a face mask composed of cosmetic liquid was obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 14]
Solvent-spun cellulose filaments spun using N-methylmorpholine N-oxide as a solvent were cut to 35 mm. After carding the obtained cut cotton, water flow entanglement treatment was performed, air was applied from the back surface of the net, and then the cotton was dried with hot air at 100 ° C. And a face mask composed of cosmetic liquid was obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Example 15]
The conditions are the same as in Example 1 except that the face mask sheet using the polyethylene spunbonded non-woven fabric as the support is folded in half in the upper and lower halves so that the supports overlap, then divided into three equal parts on the left and right and folded in three from the left part. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 1]
From the cellulose fiber nonwoven fabric and the cosmetic liquid under the same conditions as in Example 2 except that the obtained cellulose fiber nonwoven fabric was punched into the shape of a face mask so that the vertical direction of the face mask was the nonwoven fabric machine direction (MD direction). Obtained a face mask composed. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 2]
The obtained cellulose fiber non-woven fabric was punched into the shape of a face mask so that the vertical direction of the face mask was the non-woven fabric machine direction (MD direction), and a pearl film (white and glossy hydrophobic film) was used as a support. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 15. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 3]
A face composed of a cellulose fiber non-woven fabric and a cosmetic liquid under the same conditions as in Example 1 except that the face mask sheet is folded in half in half on the left and right and then folded in half in the vertical direction. I got a mask. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 4]
A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained under the same conditions as in Example 7 except that air was not applied from the net surface immediately before drying. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 5]
Net speed is 15m / min. A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was prepared under the same conditions as in Example 1 except that the face mask sheet was folded in half in the upper and lower halves and then folded in half in the left-right direction. Obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 6]
Ryocell short fiber non-woven fabric (fiber length 35 mm) was used as the cellulose fiber non-woven fabric, and the conditions were the same as in Comparative Example 3 except that the face mask was punched into the shape of a face mask so that the vertical direction of the face mask was the non-woven fabric machine direction (MD direction). A face mask composed of a cellulose fiber non-woven fabric and a cosmetic liquid was obtained. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

[Comparative Example 7]
A short fiber non-woven fabric (fiber length 35 mm) with rayon / PET = 80/20 (mass ratio) was used as the non-woven fabric, and the face mask was punched into the shape of a face mask so that the vertical direction was the non-woven fabric machine direction (MD direction). Obtained a face mask composed of a non-woven fabric of cellulose fibers and a cosmetic solution under the same conditions as in Example 1. The evaluation results of the characteristics of the obtained cellulose fiber non-woven fabric, the characteristics of the face mask, the handleability, the wearing feeling, etc. are shown in Tables 1 and 2 below.

As can be seen from Table 2, the face mask of the present embodiment is excellent in handleability when wet, has excellent adhesion to the skin, a feeling of wearing, and a feeling of moisturizing, and is less likely to bend even when filled with cosmetic liquid. rice field.

The face mask of the present invention is excellent in handleability when wet, and has high adhesion to the skin and a moisturizing feeling, so that it can be suitably used as a face mask that touches the skin in a wet state. In addition, since the face mask can be used without a support, the amount of waste is reduced, which leads to measures against environmental pollution.

Claims (4)

A face mask with a cellulose fiber non-woven fabric.
The basis weight of the cellulose fiber non-woven fabric is 10 g / m ² or more and 60 g / m ² or less.
The following features (A) to (D):
(A) The WET 10% modulus of the face mask is the horizontal direction of the face mask ≥ the vertical direction of the face mask;
(B) The WET elongation of the face mask under a 1N load in the left-right direction is 0.40% or more;
(C) The face mask is first folded up and down;
(D) The total number of times the face mask is folded is 3 or more ;
(E) The WET 10% modulus in the left-right direction of the face mask is 0.5 N / 50 mm or more and 20.0 N / 50 mm or less;
(F) The vertical WET 10% modulus of the face mask is 2.00 N / 50 mm or less;
Has a face mask. The face mask according to claim 1, which has no support. The face mask according to claim 1 or 2 , wherein the cellulose fiber nonwoven fabric is a continuous long fiber nonwoven fabric. The face mask according to any one of claims 1 to 3 , which comprises 100 parts by mass of the cellulose fiber nonwoven fabric and 100 parts by mass or more and 3500 parts by mass or less of the liquid cosmetics impregnated in the cellulose fiber nonwoven fabric.

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