JP6921471B2 - mask - Google Patents

Description

The present invention relates to a mask that feels good on the skin.

Conventionally, various masks have been commercially available as a protective measure against fine dust such as pollen and yellow sand, and as a countermeasure against infection such as a virus or a bacterium (see, for example, Patent Document 1). Currently, the performance required of masks is wide-ranging, such as the feel and scent when worn, in addition to the filter function that cuts out fine dust and viruses from entering the oral cavity and nasal cavity. Here, since the mask comes into contact with the skin for a long period of time, if it is not comfortable to the touch, it lacks comfort when worn and is not suitable for long-term use. Therefore, in order to improve the feel of the mask, it has been conventionally practiced to improve the innermost layer (innermost layer) that comes into contact with the skin when the mask is worn so that the mask feels better. For example, Patent Document 1 proposes a mask that is soft to the touch by lowering the coefficient of friction of the innermost layer.

Japanese Unexamined Patent Publication No. 2014-106

However, according to the research of the inventor of the present application, it has been found that even if the friction coefficient of the innermost layer is low, the feel of the mask does not necessarily improve. Therefore, in order to improve the feel of the mask, it is necessary to find out what kind of property the touch is closely related to, but the present situation is that it has not been found yet.

The present invention has been made by paying attention to the above problems, and an object of the present invention is to find out the properties of a mask that can improve the feel of the skin and to provide a mask that is excellent in the touch of the skin.

The above object of the present invention is a mask composed of at least three layers of an innermost layer, an intermediate layer and an outermost layer on the mouth side, and the bending hardness in a state where all the layers are stacked is 0.20 gf · cm ² / cm. Achieved by the following masks.

In the mask having the above structure, it is preferable that the innermost layer carries a polyhydric alcohol. In this case, it is more preferable that the polyhydric alcohol is glycerin.

Further, it is preferable that the innermost layer is made of nylon.

Further, the bending hardness ^{is preferably 0.10 gf · cm 2} / cm or less.

According to the mask of the present invention, when all the layers constituting the mask are stacked and the bending hardness is 0.20 gf · cm ² / cm or less, an excellent touch can be obtained. Therefore, it is possible to obtain a better wearing feeling than ever before.

It is a front view of the mask which concerns on one Embodiment of this invention. It is a perspective view which shows the innermost layer, the intermediate layer and the outermost layer which make up the mask of FIG.

Hereinafter, the actual form of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the appearance configuration of the mask 1 which is an embodiment of the present invention. The mask 1 according to the present invention is formed in a horizontally long shape having a size covering the mouth and nose. The size of the mask 1 is preferably, for example, about 100 mm to 190 mm in the horizontal direction and about 50 mm to 100 mm in the vertical direction in consideration of the size of the face. Further, it is more preferably about 150 mm to 180 mm in the horizontal direction and about 70 mm to 90 mm in the vertical direction.

The mask 1 according to the present invention has at least a three-layer structure, and in the present embodiment, as shown in FIG. 2, the mask 1 includes at least the innermost layer 2 on the mouth side, the intermediate layer 3 having high filter performance, and the outermost layer 4. ing. As each of the layers 2 to 4 constituting the mask 1, a breathable sheet material such as a woven fabric or a non-woven fabric can be used. Among them, the non-woven fabric obtained by the spunbond method, the melt blow method, the thermal bond method or the spunlace method can be preferably used. A non-woven fabric produced by the Melt Blowing Method can be more preferably used. In consideration of the above points, as a suitable layer structure of the mask 1, for example, an SMS layer (three-layer structure of spunbond-melt blow-spunbond) can be mentioned.

The mask 1 is formed by integrating the peripheral portions of the stacked layers 2 to 4 (sheet materials) by sewing, ultrasonic welding, or heat welding. Ear hook bands 10 are attached to the left and right ends of the mask 1 by ultrasonic welding or the like. The material of the ear hook band 10 is not particularly limited, but a stretchable material such as polyester is preferable. Further, at least one pleat (fold) 11 can be formed on the mask 1 by a crease extending in the lateral direction. Since the pleats 11 extend the mask 1 in the vertical direction (vertical direction), the mask 1 can be made to correspond to various face sizes. Further, the mask 1 can contain a linear nose piece 12 made of a plastic resin such as polyethylene, a biodegradable resin, or the like, for example, along the upper side thereof. Since the nose piece 12 prevents the gap between the nose and the mask 1 from opening, the mask 1 can be fitted to the face. The position of the nose piece 12 is fixed by ultrasonic welding at the top and bottom of the mask 1.

As the material of the woven fabric and the non-woven fabric constituting each layer 2 to 4 (sheet material) of the mask 1, known materials can be used, for example, natural fibers such as paper, rayon, cotton, polypropylene, polyethylene, polyester, etc. Synthetic fibers such as nylon can be used. Among them, polypropylene / polyethylene can be preferably used from the viewpoint of productivity, polypropylene can be used from the viewpoint of shape retention, and nylon can be used from the viewpoint of touch. In consideration of the above points, as suitable materials for each of the layers 2 to 4 of the mask 1, for example, nylon is used for the innermost layer 2 that comes into contact with the skin when worn, and polypropylene is used for the intermediate layer 3 and the outermost layer 4, respectively. be able to.

The mask 1 according to the present invention described above has a bending hardness of 0.20 gf · cm ² / cm or less. Here, the "flexural rigidity" refers to the hardness (recoverability) when all the layers 2 to 4 constituting the mask 1 are stacked and bent, and the bending hardness is small. It can be said that it is easier to bend. As a result of intensive research on what kind of properties a mask having a good feel is, the inventor of the present application has found that the bending hardness of the mask is greatly related to the touch. .. Therefore, the mask 1 according to the present invention is characterized in that the flexural rigidity is 0.20 gf · cm ² / cm or less, which gives an excellent feel to the touch.

The following method can be shown as a method for measuring the flexural rigidity. First, a sample obtained by cutting the sheet material constituting each of the layers 2 to 4 of the mask 1 into a length of 150 mm and a width of 50 mm is superposed. The sample may be either one collected from the mask 1 or one collected from a sheet material having the same quality as the sheet material constituting each of the layers 2 to 4 of the mask 1. When the sample is collected from the mask 1, the pleats 11 are separated and the sample is stretched in the vertical direction. Then, in a state where the samples are superposed, the bending moment M per 1 cm width in the vertical direction is measured while giving a constant curvature K with an automated pure bending tester such as KESFB-2AUTO-A (manufactured by Kato Tech Co., Ltd.). .. Then, the curvature K can be calculated average slope of the bending moment M at ^{0.5cm -1 ~1.5cm} -1 a (dM / dK), it is possible to measure the flexural stiffness. As a result, it is preferable that the mask 1 is composed of each sheet material having a measured bending hardness of 0.20 gf · cm ^{2 / cm or less, and each sheet material having a measured bending hardness of 0.10 gf · cm 2} / cm or less. It is more preferable to configure the mask 1 with. Further, as the lower limit of the bending hardness, it is preferable that the mask 1 is composed of each sheet material having ^{a bending hardness of 0.01 gf · cm 2 / cm or more.}

Examples of the element for reducing the bending hardness of the mask 1 include the basis weight, thickness, material, manufacturing method, etc. of the sheet material constituting each of the layers 2 to 4 of the mask 1, for example, the non-woven fabric. The bending hardness can be reduced by setting these as appropriate conditions, and the bending hardness can also be reduced by reducing the heat welding area of the non-woven fabric. As a result, the mask 1 is soft to the touch. Can be. As a preferable range of the texture, thickness and heat welding area of each of the layers 2 to 4, the innermost layer 2 has a ^{texture of 15 g / cm 2 to} 30 g / cm ² , a thickness of 0.15 mm to 0.25 mm, and a heat welding area of 3. % To 15%. The intermediate layer 3 has a basis weight of 15 g / cm ^{2 to} 30 g / cm ² and a thickness of 0.15 mm to 0.25 mm. The outermost layer 4 has a basis weight of 15 g / cm ^{2 to} 30 g / cm ² , a thickness of 0.15 mm to 0.25 mm, and a heat welding area of 3% to 15%.

Further, in order to reduce the bending hardness of the mask 1, it is preferable that the sheet material constituting at least one of the layers 2 to 4 of the mask 1 supports a polyhydric alcohol (polyol). The method for supporting the polyhydric alcohol on each of the layers 2 to 4 (sheet material) of the mask 1 is not particularly limited, and various methods can be selected depending on the intended purpose. For example, a method of applying a polyhydric alcohol as it is or diluted with a solvent such as water to a sheet material by printing or the like, a method of spraying with a spray or the like, a method of immersing the sheet material in the above polyhydric alcohol, and the like can be mentioned. .. Among these, a method of applying by printing or the like and a method of dipping are preferable in consideration of sufficiently supporting the polyhydric alcohol on the sheet material. The printing method is not particularly limited, and a gravure printing method, an offset printing method, or the like can be used.

Examples of the polyhydric alcohol include glycerin, dipropylene glycol, 1,3-butylene glycol, propylene glycol, sorbitol, 1,2 pentanediol, 1,2-hexanediol and the like, and among them, glycerin is preferable. These may be used individually by 1 type, and may be used in combination of 2 or more type.

In addition, mask 1 may contain other components other than polyhydric alcohol, and as other components, preservatives such as methylparaben and phenoxyethanol, moisturizers such as hypromellose and betaine, plant extracts, xanthan gum, and hydroxypropyl. Water-soluble thickeners such as methyl cellulose (HPMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), agar, guar gum, carrageenan, fragrances such as eucalyptus and mint, and surfactants that solubilize fragrances (nonionic surfactants). Activators, amphoteric surfactants, anionic surfactants) and the like can be exemplified. Such other components can be appropriately included in the sheet material constituting at least one of the layers 2 to 4 of the mask 1. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The polyhydric alcohol is preferably diluted with a solvent such as water or isopropyl alcohol. In this case, the blending amount of the polyhydric alcohol in the diluted solution is preferably 20% by weight to 40% by weight.

Among the layers 2 to 4 constituting the mask 1, the polyhydric alcohol is preferably supported on the innermost layer 2 that comes into contact with the skin when worn. The amount of the polyhydric alcohol supported on the innermost layer 2 is not particularly limited, and is appropriately adjusted according to various conditions of the polyhydric alcohol such as the size of the mask 1, the concentration and type of the polyhydric alcohol, and the amount used. It can be selected, but if it is too much, stickiness will occur, but if it is too little, the effect will be the same as when it is not supported ^{. Therefore, 1.5 g / m 2 to} 4.5 g / m ² is preferable. Even if to be supported in the polyhydric alcohol in the intermediate layer 3 and the outermost layer 4, the supported amount may be suitably selected in the same manner as described ^{above, 1.5g / m 2 ~4.5g / m} 2 is preferred.

The polyhydric alcohol may be supported on a part of each layer 2 to 4 or all of them, or may be supported on only one place or a plurality of places. The above value is the weight of the polyhydric alcohol with the area where the polyhydric alcohol is supported in each of the layers 2 to 4 as the denominator. When the mask 1 includes four or more layers, each layer will be described in the same manner.

When the polyhydric alcohol is supported on the layer constituting the mask 1, the flexural rigidity of the mask 1 on which the polyhydric alcohol is supported satisfies the above value.

The mask 1 provided with the layer carrying the polyhydric alcohol is stored in an airtight storage bag (not shown) after drying for a predetermined time.

Further, in the mask 1 according to the present invention, the fiber diameter (fineness) of the sheet material constituting each of the layers 2 to 4 is reduced, and in particular, the fiber diameter of the sheet material forming the innermost layer 2 is reduced to reduce the fiber diameter of the mask 1. Can be made even more soft to the touch.

Although one embodiment of the present invention has been described above, the specific embodiment of the mask according to the present invention is not limited to the above embodiment. For example, in the above embodiment, the mask 1 mainly has a three-layer structure, but the mask 1 may have at least three layers, and may have four or more layers as long as it has the above flexural rigidity. When the mask 1 has a four-layer structure or more, for example, at least one of the above three layers 2 to 4 may be a plurality of two or more layers, and for example, only the intermediate layer 3 may be a plurality of two or more layers. May be good. Further, for example, in addition to the above three layers 2 to 4, one or more functional layers may be provided. Examples of the functional layer include a layer to which a colorant, a fragrance, a pattern, etc. are imparted, a layer to which antibacterial property, a moisturizing property, etc. are imparted, and a layer to which a desired function is imparted is appropriately provided according to the purpose. be able to. These layers may be used alone or in combination of two or more.

When four or more layers are provided, the size, material, amount of polyhydric alcohol supported, supporting method, and the like of each layer other than the above three layers 2 to 4 will be described in the same manner as described above. .. Further, in this case, the bending hardness is measured as described above with all four or more layers stacked, and the bending hardness is satisfied with all the layers stacked.

Hereinafter, examples of the present invention will be described. The present invention is not limited to the following examples. Here, seven types of examples and one type of comparative example will be described. In addition, all Examples 1 to 7 are masks having a three-layer structure of an innermost layer, an intermediate layer and an outermost layer, and Comparative Example 1 has five layers of one innermost layer, two intermediate layers and two outermost layers. It is a mask of the structure. Further, in Examples 1, 2, 3, 5, and 7, a polyhydric alcohol (here, glycerin is used) is supported on the innermost layer. Table 1 shows the materials of each layer of the masks of Examples 1 to 7 and Comparative Example 1, the amount of polyhydric alcohol supported, the method of carrying polyhydric alcohol, and the flexural rigidity. The details of each material are shown in Table 2. The method for measuring the bending hardness of the mask is as described above (the measuring device used is KESFB-2AUTO-A (manufactured by Kato Tech Co., Ltd.)), and more specifically, the mask was first cut into a width of 5 cm. Place the sample on the sample table and insert the sample until the sample insertion position confirmation lamp lights up. Next, the measurement switch is pressed to tighten the chuck, and after the tightening is completed, the measurement switch is pressed again to automatically measure the bending hardness data.

Five subjects were asked to wear the masks of Examples 1 to 7 and Comparative Example 1, and a sensory test was conducted on the feel during wearing. The evaluation was made by the Visual Analogue Scale (VAS). Specifically, present the subject with a straight line with a length of 10 cm (the left end is "feeling bad" and the right end is "feeling good"), and ask them to check how soft the mask is. Was evaluated by. The distance from the left end (0 cm at the left end and 10 cm at the right end) was measured, and the average value of the subjects was calculated. 8 cm or more and 10 cm is "◎ (very good to the touch)", 6.5 cm or more and less than 8 cm is "○ (good to the touch)", 5 cm or more and less than 6.5 cm is "△ (slightly soft to the touch"), less than 5 cm Was "x (feeling bad)". The evaluation results are shown in Table 3.

As shown in Table 3, when the masks of Examples 1 to 7 having a bending hardness of 0.20 gf · cm ² / cm or less are attached, the bending hardness is 0.20 gf · cm ² / cm. It has received a higher evaluation in terms of touch than the case of wearing the larger mask of Comparative Example 1, and further, like the masks of Examples 1 to 3 and 5, the bending hardness is 0.10 gf · cm ² / cm. In the following cases (particularly, when the bending hardness is 0.05 gf · cm ² / cm or less as in the mask of Example 1), the evaluation was particularly high. From the above results, the flexural rigidity is determined. It was confirmed that the mask according to the present invention can obtain an excellent feel by setting the amount to 20 gf · cm ^{2 / cm or less.} Therefore, we were able to achieve an unprecedentedly good fit.

Further, from the comparison between Example 3 and Example 4, it was found that when the polyhydric alcohol was supported on the innermost layer, the bending hardness of the mask was reduced and the touch was further improved. Further, from a comparison between Example 1 and Example 2, it is better to support the polyhydric alcohol on the innermost layer by printing (here, gravure printing) than to support the polyhydric alcohol on the innermost layer by spraying. It was confirmed that the hardness can be effectively reduced and the excellent touch is possible.

Further, from the comparison between Example 4 and Example 6, it was confirmed that when the innermost layer is made of nylon, the bending hardness of the mask is reduced and excellent touch is possible.

When the friction coefficient of the innermost layer of the masks of Example 1, Example 6 and Comparative Example 1 was measured, the mask of Example 1 was 0.23, the mask of Example 6 was 0.106, and Comparative Example 1. The mask was 0.128. On the other hand, the results of the sensory evaluation of the masks of Example 1, Example 6 and Comparative Example 1 are 8.6 points, 6.0 points and 3.8 points, respectively, so that the friction coefficient is low. However, it was confirmed that the mask does not always feel good to the touch. The coefficient of friction was measured with a KES-SE-STP "friction feeling tester" (manufactured by Kato Tech Co., Ltd.) or the like. A sample with a width of 3 cm and a length of 15 cm is sandwiched between fixing chucks and fixed to the sample table, a pulley for measurement is attached to the main body of the measuring device, zero point correction is performed, and then the start button is pressed to start measuring the coefficient of friction. And thus measured.

1 Mask 2 Innermost layer 3 Intermediate layer 4 Outermost layer

Claims (5)

A mask consisting of at least three layers, the innermost layer, the middle layer, and the outermost layer on the mouth side.
Ri hardness der less 0.20gf · ^cm 2 / ^cm bend in a laminated state all layers,
A mask in which each of the innermost layer, the intermediate layer, and the outermost layer is a non-woven fabric. The mask according to claim 1, wherein the innermost layer carries a polyhydric alcohol. The mask according to claim 2, wherein the polyhydric alcohol is glycerin. The mask according to any one of claims 1 to 3, wherein the innermost layer is made of nylon. The mask according to any one of claims 1 to 4, wherein the bending hardness is 0.10 gf · cm ^{2 / cm or less.}

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