WO2016199883A1 - マスク - Google Patents
マスク Download PDFInfo
- Publication number
- WO2016199883A1 WO2016199883A1 PCT/JP2016/067314 JP2016067314W WO2016199883A1 WO 2016199883 A1 WO2016199883 A1 WO 2016199883A1 JP 2016067314 W JP2016067314 W JP 2016067314W WO 2016199883 A1 WO2016199883 A1 WO 2016199883A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fibers
- mask
- layer
- nonwoven fabric
- thickness
- Prior art date
Links
- 239000000835 fiber Substances 0.000 claims abstract description 100
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 92
- -1 polypropylene Polymers 0.000 claims abstract description 29
- 239000004743 Polypropylene Substances 0.000 claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- 229920000728 polyester Polymers 0.000 claims abstract description 15
- 229920001778 nylon Polymers 0.000 claims abstract description 14
- 239000004698 Polyethylene Substances 0.000 claims abstract description 10
- 229920000297 Rayon Polymers 0.000 claims abstract description 10
- 229920000573 polyethylene Polymers 0.000 claims abstract description 10
- 239000002964 rayon Substances 0.000 claims abstract description 10
- 229920000742 Cotton Polymers 0.000 claims abstract description 8
- 229920006221 acetate fiber Polymers 0.000 claims abstract description 8
- 210000002268 wool Anatomy 0.000 claims abstract description 8
- 229920006307 urethane fiber Polymers 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 13
- 230000006835 compression Effects 0.000 abstract description 41
- 238000007906 compression Methods 0.000 abstract description 41
- 206010013975 Dyspnoeas Diseases 0.000 abstract description 5
- 229920000058 polyacrylate Polymers 0.000 abstract description 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 128
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005259 measurement Methods 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 208000000059 Dyspnea Diseases 0.000 description 4
- 230000001953 sensory effect Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 101100187475 Mus musculus Nr1h4 gene Proteins 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 208000035285 Allergic Seasonal Rhinitis Diseases 0.000 description 1
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000013566 allergen Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Substances NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
- B32B5/265—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
- B32B5/266—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer next to one or more non-woven fabric layers
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2500/00—Materials for garments
- A41D2500/30—Non-woven
Definitions
- the present invention relates to a mask that can be worn comfortably for a long time with greatly improved wearing comfort.
- a mask has been proposed in which a non-woven fabric containing a specific amount of regenerated cellulose fiber is used in the inner layer portion, thereby eliminating the stuffiness of the space in the mask (see Patent Document 1). .
- a mask having a function of inactivating allergens and viruses a mask that is easy to breathe when worn by providing a filtration layer and an enzyme layer having a specific basis weight has been proposed (see Patent Document 2).
- a mask is proposed in which the surface on the side in contact with the wearer's face is made of a specific moisture-permeable material (see Patent Document 3).
- the above-mentioned patent document discloses a mask that can easily breathe when worn and does not feel stuffy, that is, can improve the wearing feeling.
- the functions required of masks are diversified because of increasing opportunities for wearing masks. It is an object of the present invention to provide a mask having a significantly improved wearing comfort by focusing on “wearing comfort” as one of the functions required for the mask.
- the present inventors have intensively studied to solve the above problems, and have found that the compression characteristic of the mask body is important as a factor necessary for improving the wearing comfort. And in order to provide a specific compression characteristic to a mask main body, it discovered that the said subject could be solved by providing a buffer layer in the intermediate
- the present invention is a non-woven mask having a mask body covering at least a part of the user's face, and a pair of ear hooks provided on both sides of the mask body,
- the mask body has a multilayer structure having at least an outermost layer, an intermediate layer, and a mouthpiece layer,
- the intermediate layer is at least selected from polyester fibers, polypropylene fibers, rayon fibers, acrylate fibers, nylon fibers, acetate fibers, wool fibers, cotton fibers, urethane fibers, and polyethylene fibers.
- a buffer layer made of a nonwoven fabric containing one or more kinds
- the mask body is a non-woven mask having a compression characteristic WC measured by a KES system of 0.5 to 2.0 gf ⁇ cm / cm 2 .
- the buffer layer is preferably made of a nonwoven fabric having a basis weight of 30 g / m 2 or more, and is preferably a needle punched nonwoven fabric.
- the mask body preferably has a thickness of 1.0 mm or more, and the mouthpiece layer is preferably made of a nonwoven fabric using fibers having an official moisture content of 1% or more.
- the intermediate layer further includes one or more collection filters, and the mouthpiece layer and the buffer layer are arranged adjacent to each other.
- a non-woven mask in which the wearing comfort is greatly improved without lowering the feeling of wearing such as breathlessness and stuffiness.
- FIG. 2 is a schematic diagram showing a layer structure of a mask main body taken along a line AA in FIG. 1. It is a graph explaining the compression characteristic in a KES test.
- the mask according to the present invention is a non-woven mask having a mask main body that covers at least a part of the user's face, and a pair of ear hooks provided on both sides of the mask main body.
- FIG. 1 A mask 10 shown in FIG. 1 has a mask body 1 and a pair of ear hooks 2 provided on both sides of the mask body 1.
- the mask 10 is a pleated mask and has pleats formed from a plurality of lateral folds in the drawing.
- a box fold (box pleat) is provided in the center of the mask body 1 along the left-right direction, two upward car folds (one-way pleats) above the center box fold, and a downward direction.
- the mask body 1 is folded into a substantially planar shape so as not to be bulky, and is configured to have a three-dimensional shape that bulges outward when the mask body 1 is unfolded when worn. .
- FIG. 1 one box fold, two upward car folds, and two downward car folds are formed.
- the pleat shape is 0-3 independently of the box fold in the center of the mask.
- One wheel fold may be formed, and preferably one or two vehicle folds are formed.
- the mask according to the present invention may be entirely constituted by vehicle folds. In that case, it is sufficient that 1 to 6 vehicle folds are formed in the left-right direction of the mask main body 1.
- a nose fitter may be provided on the upper side portion of the mask body 1, and for example, a metal thin plate, a polyethylene thin plate, or a polypropylene thin plate can be used as the nose fitter.
- a mouse bar may be provided in the central portion of the mask body 1 to maintain the mask shape when worn, and the same material as that usable for the nose fitter can be applied.
- the mask according to the present invention may be a flat mask that is not pleated.
- the mask body is a multilayer structure having at least an outermost layer, an intermediate layer, and a mouthpiece layer.
- a buffer layer is included at least and you may have a collection filter, an antibacterial filter, etc. besides this.
- FIG. 2 is a schematic view showing the layer structure of the mask body in the cross section along the line AA in FIG. It has a configuration in which the outer layer 3 is laminated in order.
- other layers may be included, the filter layer may be omitted, or the number of layers may be changed.
- the mask body has a compression characteristic WC (gf ⁇ cm / cm 2 ) measured by the KES system of 0.5 or more.
- the inventors of the present invention have reached that the mask main body can have such a compression characteristic to achieve a mask that is comfortable to wear.
- the compression property WC (gf ⁇ cm / cm 2 ) is preferably 0.6 or more, more preferably 0.7 or more, still more preferably 0.8 or more, and 0.85 or more. It is particularly preferred.
- the compression property WC is too high, it tends to cause stuffiness and breathlessness in the mouth, and the feeling of use tends to decrease, so it is usually 2.0 or less, preferably 1.8 or less. It is more preferably 6 or less, and further preferably 1.5 or less.
- the initial thickness T 0 (mm) for calculating the compression characteristic WC is preferably 1.0 or more, more preferably 1.2 or more, and 1.4 More preferably, it is more preferably 1.6 or more.
- the upper limit is not particularly limited, but is usually 4.0 or less, preferably 3.5 or less, more preferably 3.0 or less, still more preferably 2.8 or less. Particularly preferred is 5 or less.
- the thickness T M (mm) at the time of maximum compression for calculating the compression characteristic WC, which is also measured by the KES system is preferably 0.4 or more, and more preferably 0.5 or more. And more preferably 0.6 or more.
- the upper limit is usually 1.2 or less, preferably 1.0 or less, more preferably 0.8 or less, still more preferably 0.75 or less, and 0.7 or less. Is particularly preferred.
- the compression characteristics WC, T 0 , and T M can be measured by the following method.
- the compression characteristics can be measured by “Kamio Kawabata, Textile Engineering Journal (Textile Engineering) Vol. 33 No. 2 (1980) (hereinafter also referred to as Reference Document 1) ”.
- KESFB3-AUTO-A automated compression tester manufactured by Kato Tech Co., Ltd. can be used as the measuring instrument used for the measurement.
- other measuring instruments are used, and the measuring method described in Reference 1 is realized.
- a measuring instrument that can be used may be used.
- the area of the pressure plate to the nonwoven fabric is 2.0 cm 2
- the compression deformation rate is 0.02 mm / sec
- the maximum compressive load is 50 gf / cm 2 .
- FIG. 3 shows a graph for measuring and calculating the compression characteristic WC.
- the y-axis direction indicates the pressure P (gf / cm 2 ) applied to the nonwoven fabric
- the x-axis direction (horizontal axis direction) in the drawing indicates the thickness T (mm) of the nonwoven fabric.
- B on the x-axis shows the thickness T 0 of the nonwoven fabric when the pressure P is 0, and C on the x-axis in the figure is the nonwoven fabric when the pressure P is 50 gf / cm 2 which is the maximum compressive load.
- the thickness TM is shown.
- WC is calculated as an integral value of P when T is T 0 to T M , that is, an area of a + b in the figure.
- the curve with the larger P value shows the movement of the thickness T when a compressive load is applied to the nonwoven fabric.
- the curve with the smaller value shows the movement of the thickness T when releasing the compressive load from the nonwoven fabric.
- the compression characteristics include LC indicating compression strength and RC indicating compression recovery, and are defined as follows.
- the buffer layer is at least one selected from polyester fibers, polypropylene fibers, rayon fibers, acrylate fibers, nylon fibers, acetate fibers, wool fibers, cotton fibers, urethane fibers, and polyethylene fibers. It may be a non-woven fabric comprising one or more species, and may be a non-woven fabric comprising one type of fiber or a mixed non-woven fabric comprising two or more types of fibers.
- a mixed nonwoven fabric composed of two or more kinds of fibers for example, a mixed nonwoven fabric of acrylate fibers and polypropylene fibers, a mixed nonwoven fabric of acrylate fibers and polyester fibers, a mixed nonwoven fabric of rayon fibers and polypropylene fibers, etc.
- an acrylate fiber it is preferable to include an acrylate fiber.
- the acrylate fiber used in the present invention is preferably a fiber obtained by introducing a metal salt carboxyl group into the acrylate fiber by introduction and hydrolysis of a hydrazine compound and by neutralization if necessary. .
- cross-linked polyacrylate fibers examples are “Ex (registered trademark)”, “Moiscare (registered trademark)”, “Dismel (registered trademark)”, “Etiquette” manufactured by Toyobo Co., Ltd. (Registered trademark) ",” mois fine (registered trademark) "and the like.
- a nonwoven fabric with a large basis weight as the nonwoven fabric constituting the buffer layer preferably 30 g / m 2 or more, more preferably 40 g / m 2 or more, and 45 g / m 2 or more. It is more preferable that it is 50 g / m 2 or more.
- the upper limit is usually 80 g / m 2 or less, and preferably 70 g / m 2 or less.
- a non-woven fabric having a basis weight of about 20 g / m 2 is used in order to prevent stuffiness and breathlessness in consideration of wearing feeling.
- the wearing comfort is greatly improved by employing a non-woven fabric having a basis weight which is not normally used for a mask.
- the thickness of the buffer layer is preferably 0.3 mm or more, and more preferably 0.6 mm or more. Moreover, it is 1.5 mm or less normally, More preferably, it is 1.0 mm or less.
- the measuring method of thickness shall follow the JIS L 1913A method (constant pressure of 0.5 kPa).
- the buffer layer has a compression characteristic WC (gf ⁇ cm / cm 2 ) measured by the KES system of usually 0.4 or more, preferably 0.5 or more, and preferably 0.6 or more. Is more preferably 0.7 or more, and particularly preferably 0.8 or more. Moreover, it is 2.0 or less normally, it is preferable that it is 1.8 or less, it is more preferable that it is 1.6 or less, and it is still more preferable that it is 1.5 or less.
- the compression characteristic WC of the buffer layer By setting the compression characteristic WC of the buffer layer within the above range, the compression characteristic WC of the mask body can be easily set within a desired range. In order to set the compression characteristic WC of the buffer layer in the above range, it can be achieved by increasing the basis weight of the nonwoven fabric constituting the buffer layer or increasing the thickness of the buffer layer.
- the nonwoven fabric constituting the buffer layer can be manufactured by a known manufacturing method. Specifically, spun bond, thermal bond, spun lace, air through, melt blow, needle punch, etc. are applied. In the present invention, a nonwoven fabric produced by needle punching or air-through is preferably applied.
- a nonwoven fabric manufactured by needle punching or air-through for the buffer layer it becomes easy to adjust the thickness to a preferable value while suppressing an excessive increase in the compression characteristic WC.
- the nonwoven fabric manufactured with a needle punch is bulky and fluffy, it is easy to make it soft and soft, and it is most preferable to employ a nonwoven fabric manufactured with a needle punch for the buffer layer of the present invention.
- the buffer layer may be a single layer or two or more layers of non-woven fabric manufactured by a single manufacturing method, and further laminated or bonded each non-woven fabric manufactured by a plurality of manufacturing methods May be used.
- the buffer layer of the present invention may be formed integrally with the mouthpiece layer and / or the outermost layer.
- the outermost nonwoven fabric is not particularly limited, and generally known fibers can be used as a mask material. Specific examples include polyester fibers, polypropylene fibers, rayon fibers, nylon fibers, acrylate fibers, acetate fibers, wool fibers, cotton fibers, urethane fibers, and polyethylene fibers.
- the nonwoven fabric which consists of these 1 type of fibers may be sufficient, and the mixed nonwoven fabric which consists of 2 or more types of fibers may be sufficient.
- a fiber having an official moisture content of 1% or more examples include rayon fibers, nylon fibers, acrylate fibers, acetate fibers, wool fibers, and cotton fibers, and nylon fibers are particularly preferable.
- the official moisture content means the moisture content of the fiber in an environment of 20 ° C. and 60% RH.
- the basis weight of the outermost nonwoven fabric is preferably 40 g / m 2 or less, more preferably 35 g / m 2 or less, and further preferably 30 g / m 2 or less. On the other hand, it is preferably 10 g / m 2 or more, and more preferably 15 g / m 2 or more.
- the nonwoven fabric of the mouthpiece layer is not particularly limited, and generally known fibers can be used as a mask material. Specific examples include polyester fibers, polypropylene fibers, rayon fibers, nylon fibers, acrylate fibers, acetate fibers, wool fibers, cotton fibers, urethane fibers, and polyethylene fibers.
- the nonwoven fabric which consists of these 1 type of fibers may be sufficient, and the mixed nonwoven fabric which consists of 2 or more types of fibers may be sufficient.
- a fiber having an official moisture content of 1% or more examples include rayon fibers, nylon fibers, acrylate fibers, acetate fibers, wool fibers, and cotton fibers, and nylon fibers are particularly preferable.
- fibers having an official moisture content of 1% or more include rayon fibers, nylon fibers, acrylate fibers, acetate fibers, wool fibers, and cotton fibers, and nylon fibers are particularly preferable.
- the moisture content is higher than the materials such as polypropylene and polyethylene used for the mask layer of general masks. Since the fibers become softer and the fibers are softer, the wearing comfort tends to be improved.
- the basis weight of the nonwoven fabric of the mouthpiece layer is preferably 40 g / m 2 or less, more preferably 30 g / m 2 or less, and still more preferably 20 g / m 2 or less. On the other hand, it is preferably 5 g / m 2 or more, and more preferably 10 g / m 2 or more. Moreover, it is preferable to use a thin fiber as the nonwoven fabric constituting the mouthpiece layer. Specifically, the average fiber diameter is preferably 18 ⁇ m or less, and more preferably 15 ⁇ m or less. By using a non-woven fabric with fine fibers in this way, it is possible to obtain a mask body that is softer and has much improved comfort. Further, the nonwoven fabric of the mouthpiece layer is preferably thin, and the specific thickness is preferably 0.2 mm or less, and more preferably 0.15 mm or less.
- a filter layer may be provided as an intermediate layer.
- the filter layer is a non-woven fabric made of fine fibers so as to collect fine particles such as pollen, dust and viruses.
- the fibers used include polyester fibers, polypropylene fibers, and polyethylene fibers.
- a known method is used as a method for producing the filter layer, it is preferably produced by a melt blown method.
- the basis weight of the nonwoven fabric used for the filter layer is preferably 40 g / m 2 or less, more preferably 30 g / m 2 or less, still more preferably 20 g / m 2 or less, and 15 g / m 2 or less. Most preferably it is.
- the lower limit is preferably 5 g / m 2 or more, and more preferably 10 g / m 2 or more.
- the filter layer may have only one layer or two or more layers, but preferably has two or more layers from the viewpoint of stabilizing the collection efficiency of the fine particles.
- the mask body has a multilayer structure having an intermediate layer between the outermost layer and the mouthpiece layer.
- Any layer structure may be used as long as it has a buffer layer as an intermediate layer, but it is preferable that the mouthpiece layer and the buffer layer are adjacent to each other in order to improve the wearing comfort of the mask.
- the total basis weight of the nonwoven fabric used for the mask body of the present invention is preferably 150 g / m 2 or less, more preferably 140 g / m 2 or less, and further preferably 130 g / m 2 or more. On the other hand, it is preferably 85 g / m 2 or more, more preferably 90 g / m 2 or more, and further preferably 100 g / m 2 or more.
- the mask manufacturing method according to the present invention is not particularly limited, and can be manufactured according to a known method.
- a mask body is manufactured by overlaying nonwoven fabrics constituting the outermost layer, the filter layer, the buffer layer, and the mouthpiece layer, and subjected to pleating as necessary, so that an ear strap, a nose fitter, and / or a mouse bar It is completed through known and common processes such as installation.
- Nylon nonwoven fabric having a basis weight of 30 g / m 2 as the outermost layer
- Two layers of polypropylene nonwoven fabric having a basis weight of 10 g / m 2 as a filter layer (each thickness: 0.18 mm)
- Mixed nonwoven fabric having a basis weight of 55 g / m 2 and a thickness of 0.70 mm as a buffer layer
- nonwoven fabric having a surface layer of a spunbond nonwoven fabric made of polyester and a back layer of a needle punched nonwoven fabric made of acrylate fibers and polyester fibers
- Nylon nonwoven fabric having a basis weight of 20 g / m 2 , a thickness of 0.14 mm, and an average fiber diameter of 14.4 ⁇ m
- a mask having a five-layer structure (thickness: 1.1 mm, total weight: 125 g / m 2 ) laminated in this order according to a conventional method was produced.
- the thickness of a nonwoven fabric and a mask is the value measured according to JISL1913A method (constant pressure of 0.5 kPa).
- ⁇ Comparative example 2> A commercially available mask (A company mask, purchased in April 2015) was used. The nonwoven fabric used in this mask was divided into layers, and the basis weight of each layer and the thickness of the mouthpiece layer were measured, Outer layer: basis weight 31 g / m 2 and thickness 0.3 mm, Filter layer: basis weight 27 g / m 2 and thickness 0.17 mm, Mouth layer: 25 g / m 2 per unit area and 0.25 mm thickness, The total basis weight of this three-layer structure mask was 83 g / m 2 . The thickness of the nonwoven fabric was measured under the same conditions as in Example 1.
- the buffer layer has a basis weight of 55 g / m 2 and a mixed nonwoven fabric having a thickness of 0.93 mm (a surface layer of a spunbond nonwoven fabric made of polyester and a backing layer of a needle punched nonwoven fabric made of rayon fiber and polyester fiber)
- a mask thickness: 1.5 mm, total basis weight: 125 g / m 2 ) having a five-layer structure according to Example 2 was manufactured.
- the measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- the buffer layer has a basis weight of 55 g / m 2 and a mixed nonwoven fabric having a thickness of 1.4 mm (a surface layer of a spunbond nonwoven fabric made of polyester and a back layer of a needle punched nonwoven fabric made of acrylic fiber and polyester fiber)
- the mask (thickness: 1.9 mm, total basis weight: 125 g / m 2 ) having a five-layer structure according to Example 3 was manufactured.
- the measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- Example 4 The mask of Example 1 has a five-layer structure according to Example 4 using a mixed nonwoven fabric (air-through polyester, polyethylene and polypropylene mixed nonwoven fabric) having a buffer layer weight of 35 g / m 2 and a thickness of 0.81 mm. A mask (thickness: 1.3 mm, total weight: 105 g / m 2 ) was manufactured. The measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- a mixed nonwoven fabric air-through polyester, polyethylene and polypropylene mixed nonwoven fabric
- a mask (thickness: 1.3 mm, total weight: 105 g / m 2 ) was manufactured.
- the measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- Example 5 In the mask of Example 1, a buffer layer is disposed at a position adjacent to the outermost layer (outermost layer ⁇ buffer layer ⁇ filter layer 2 layer ⁇ mouth layer), and a mask having a five-layer structure according to Example 5 ( Thickness: 1.1 mm, total weight: 125 g / m 2 ) was manufactured. The measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- Example 6 A mask having a three-layer structure according to Example 6 (thickness: 0.95 mm, total basis weight: 105 g / m 2 ) obtained by removing the two filter layers from the mask of Example 1 was used.
- the measurement conditions for the thickness of the nonwoven fabric and the average fiber diameter are the same as in Example 1.
- the mask according to the present invention has been evaluated very well on the feeling of wearing, such as per-skin at the time of wearing the mask, the softness of the mask, and the smooth feeling, while being used such as breathlessness and stuffiness in the mask. There was no problem with the feeling. In addition to this, the odor of the mask is also suppressed, and the nylon nonwoven fabric adopted as the mouthpiece layer and the buffer layer that sets the compression characteristic WC value of the mask body to a specific value to improve the wearing comfort can reduce some odor It is thought that also worked. The mask according to the present invention also has such an unpredictable effect.
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Abstract
Description
また、アレルゲンやウィルスを不活化する機能を有するマスクとして、濾過層と特定の目付を有する酵素層とを備えることで、着用時に呼吸がしやすいマスクが提案されている(特許文献2参照)。
更に、着用感を向上することができるマスクとして、着用者の顔面に接触する側の表面が、特定の透湿性素材で構成されているマスクが提案されている(特許文献3参照)。
一方で、マスクを装着する機会が増加したことで、マスクに要求される機能も多様化している。本発明は、マスクに要求される機能の一つとして「つけ心地」に着目し、つけ心地が大幅に改善されたマスクを提供することを課題とする。
前記マスク本体は、少なくとも最外層、中間層、及び口許層を有する多層構造であり、
前記中間層として、ポリエステル系繊維、ポリプロピレン系繊維、レーヨン系繊維、アクリレート系繊維、ナイロン系繊維、アセテート系繊維、羊毛系繊維、コットン系繊維、ウレタン系繊維、およびポリエチレン系繊維から選択される少なくとも1種以上を含む不織布からなる緩衝層を含み、
前記マスク本体は、KESシステムにより測定された圧縮特性WCが0.5~2.0gf・cm/cm2である、不織布マスクである。
また、前記マスク本体は、厚みが1.0mm以上であることが好ましく、前記口許層は、公定水分率1%以上の繊維を使用した不織布からなることが好ましい。
また、前記中間層として更に捕集フィルターを1層又は2層以上含み、前記口許層と緩衝層とが隣接するよう配置されることが好ましい。
図1に示すマスク10は、マスク本体1及びマスク本体1の両側に設けられた一対の耳掛け部2を有する。マスク10はプリーツ加工型マスクであり、複数の図中横方向の折り目から形成されるプリーツを有する。図1では、マスク本体1の中央に左右方向に沿って箱ヒダ(ボックスプリーツ)が設けられており、中央の箱ヒダより上方向に2つの上向きの車ヒダ(ワンウェイプリーツ)、及び下方向に2つの下向きの車ヒダが設けられている。したがって、マスク10を着用していない状態ではマスク本体1は嵩張らないように略平面形状に折り畳まれており、着用時にマスク本体1を展開すると外側に向かって膨らむ立体形状となるように構成される。
図1中では1つの箱ヒダ、2つの上向きの車ヒダ及び2つの下向きの車ヒダが形成されているが、本発明においてプリーツ形状はマスク中央の箱ヒダに対して上下独立にそれぞれ0~3つの車ヒダが形成されていてよく、1~2つの車ヒダが形成されていることが好ましい。また、本発明に係るマスクは全て車ヒダで構成されていてもよく、その場合はマスク本体1の左右方向に1~6つの車ヒダが形成されていればよい。
さらに、マスク本体1の中央部には、着用時のマスク形状保持のためにマウスバーを設けてもよく、その素材はノーズフィッターに使用可能なものと同じものが適用できる。
なお、本発明に係るマスクは、プリーツ加工されていない平面マスクとすることもできる。
中間層としては、少なくとも緩衝層を含み、これ以外にも捕集フィルターや抗菌フィルターなどを有してもよい。層構成の一例を図2に示す。
図2は、図1のA-A線断面におけるマスク本体の層構成を示す模式図であり、図中右の顔面側から、口許層6、緩衝層5、2層のフィルター層4、及び最外層3が順に積層された構成を有する。本発明では、これ以外の層を含んでもよく、また、フィルター層を省略したり、層の数を変更してもよい。
加えて、同じくKESシステムにより測定された、圧縮特性WCを算出するための最大圧縮時の厚みTM(mm)が0.4以上であることが好ましく、0.5以上であることがより好ましく、0.6以上であることが更に好ましい。一方上限は通常1.2以下であり、1.0以下であることが好ましく、0.8以下であることがより好ましく、0.75以下であることが更に好ましく、0.7以下であることが特に好ましい。
圧縮特性WCを算出する際のT0、TMが上記範囲にあることで、本発明に係るマスクが実現するつけ心地を達成するための手段である圧縮特性WCを、上記範囲に調整でき易くなる。なお、上記T0はマスク本体の厚みを表している。
測定に用いる測定機器は、例えばカトーテック株式会社製 KESFB3-AUTO-A 自動化圧縮試験機を用いることができるが、これ以外の測定機器であって、上記参考文献1に記載された測定方法を実現できる測定機器を用いてもよい。KESFB3-AUTO-Aを用いる場合、不織布への加圧板の面積は2.0cm2で行い、圧縮変形速度は0.02mm/secとし、最大圧縮荷重を50gf/cm2とする。
なお、マスク本体の圧縮測定を測定する際には、プリーツ加工型のマスクであればマスクを展開した状態、即ち各層が1層ずつ積層している状態で測定する。
図3中、y軸方向(縦軸方向)は不織布への圧力P(gf/cm2)を示し、図中x軸方向(横軸方向)は不織布の厚みT(mm)を示す。
図3中x軸上のBは圧力Pが0である場合の不織布の厚みT0を示し、図中x軸上のCは圧力Pが最大圧縮荷重である50gf/cm2である場合の不織布の厚みTMを示す。そしてWCは、TがT0からTMにおけるPの積分値、即ち図中のa+bの面積として算出される。
LC:(a+bの面積)/△ABCの面積
RC:bの面積/(a+bの面積)
本発明ではこれらの圧縮特性のうち、圧縮特性WCが特定の範囲を満たすことで、マスクのつけ心地が劇的に改善されることを見出したものである。
緩衝層は、ポリエステル系繊維、ポリプロピレン系繊維、レーヨン系繊維、アクリレート系繊維、ナイロン系繊維、アセテート系繊維、羊毛系繊維、コットン系繊維、ウレタン系繊維、およびポリエチレン系繊維から選択される少なくとも1種以上を含む不織布からなり、1種の繊維からなる不織布であってもよく、2種以上の繊維からなる混合不織布であってもよい。
2種以上の繊維からなる混合不織布としては、例えばアクリレート系繊維とポリプロピレン系繊維との混合不織布、アクリレート系繊維とポリエステル系繊維との混合不織布、レーヨン系繊維とポリプロピレン系繊維との混合不織布、などが挙げられ、吸湿性能を向上させる観点からは、アクリレート系繊維を含むことが好ましい。
なお、本発明に使用するアクリレート系繊維は、アクリレート系繊維にヒドラジン系化合物による架橋の導入及び加水分解並びに必要なら中和により金属塩型カルボキシル基の導入を施されてなる繊維であることが好ましい。このような架橋型ポリアクリレート系繊維としては、流通しているものとして例えば東洋紡株式会社製の「エクス(登録商標) 」、「モイスケア(登録商標) 」、「ディスメル(登録商標) 」、「エチケット(登録商標) 」、「モイスファイン(登録商標) 」等が挙げられる。
なお、通常マスクにおいては着用感を考慮して、口許のムレや息苦しさを防ぐために目付が20g/m2程度の不織布が使用される。本発明では、このように通常マスクには用いられない目付の不織布を採用することで、つけ心地が大きく改善されることを見出したものである。
緩衝層の圧縮特性WCを上記範囲とするためには、緩衝層を構成する不織布の目付を大きくしたり、緩衝層の厚みを厚くするなどにより達成することができる。
最外層の不織布の目付は、40g/m2以下であることが好ましく、35g/m2以下であることがより好ましく、30g/m2以下であることが更に好ましい。一方、10g/m2以上であることが好ましく、15g/m2以上であることがより好ましい。
口許層の不織布の目付は、40g/m2以下であることが好ましく、30g/m2以下であることがより好ましく、20g/m2以下であることが更に好ましい。一方、5g/m2以上であることが好ましく、10g/m2以上であることがより好ましい。
また、口許層を構成する不織布として、繊維が細いものを用いることが好ましい。具体的には、平均繊維直径が18μm以下であることが好ましく、15μm以下であることがより好ましい。このように繊維が細い不織布を用いることで、より柔らかく、つけ心地が大きく改善されたマスク本体とすることができる。
また、口許層の不織布の厚さは薄いものが好ましく、具体的な厚さとしては0.2mm以下であることが好ましく、0.15mm以下であることが更に好ましい。
フィルター層の製造方法は既知の方法が用いられるが、メルトブローン法により製造されることが好ましい。
フィルター層に用いる不織布の目付は、40g/m2以下であることが好ましく、30g/m2以下であることがより好ましく、20g/m2以下であることが更に好ましく、15g/m2以下であることが最も好ましい。一方、下限は5g/m2以上であることが好ましく、10g/m2以上であることがより好ましい。
フィルター層は、1層のみ有してもよく、2層以上有してもよいが、微粒子の捕集効率安定化の観点からは2層以上有することが好ましい。
最外層として目付30g/m2のナイロン不織布(厚み:0.18mm)、
フィルター層として目付10g/m2のポリプロピレン不織布を2層(各々厚み:0.18mm)、
緩衝層として目付55g/m2、厚さ0.70mmの混合不織布(ポリエステルからなるスパンボンド不織布の表層と、アクリレート系繊維及びポリエステル繊維からなるニードルパンチ不織布の裏層を有する不織布)、
口許層として目付20g/m2、厚さ0.14mm、平均繊維径14.4μmのナイロン不織布、
を準備し、常法に従ってこの順で積層した5層構造を有するマスク(厚み:1.1mm、合計目付:125g/m2)を製造した。
なお、不織布及びマスクの厚さはJIS L 1913A法(一定圧力0.5kPa)に従って測定した値である。また、平均繊維直径は、株式会社キーエンス製デジタルマイクロスコープ(VHX-1000/VH-Z75)を使用し、光学顕微鏡下で繊維の側面から直径を測定した値(n=50)の平均値である。
最外層として目付25g/m2のポリプロピレン不織布(厚み:0.23mm)、
中間層として目付18g/m2のポリプロピレン不織布、
フィルター層として目付10g/m2のポリプロピレン不織布を2層(各々厚み:0.18mm)、
口許層として目付18g/m2、厚さ0.2mm、平均繊維径19.3μmのポリプロピレン不織布
を準備し、常法に従ってこの順で積層した5層構造を有するマスク(厚み:0.85mm、合計目付:81g/m2)を製造した。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
市販のマスク(A社製マスク、2015年4月購入)を使用した。このマスクに使用されている不織布を層ごとに分け、各層の目付及び口許層の厚さを実測したところ、
外側層:目付31g/m2及び厚さ0.3mm、
フィルター層:目付27g/m2及び厚さ0.17mm、
口許層:目付25g/m2及び厚さ0.25mmであり、
この3層構造のマスクの合計目付は83g/m2であった。
なお、不織布の厚さは実施例1と同様の条件で測定した。
市販のマスク(B社製マスク、2015年4月入手)を使用した。このマスクに使用されている不織布を層ごとに分け、各層の目付並びに口許層の厚さ及び平均繊維径を実測したところ、
外側層:目付29g/m2及び厚さ0.29mm、
フィルター層:目付19g/m2及び厚さ0.18mm、
口許層:目付33g/m2、厚さ0.30mm、平均繊維径16.6μmであり、
この3層構造のマスクの合計目付は81g/m2であった。
なお、不織布の厚さ及び平均繊維径は実施例1と同様の条件で測定した。
実施例1のマスクから、緩衝層を除いたものを比較例4に係る4層構造を有するマスク(厚み:1.1mm、合計目付:70g/m2)とした。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例1のマスクにおいて、緩衝層を目付55g/m2、厚さ0.93mmの混合不織布(ポリエステルからなるスパンボンド不織布の表層と、レーヨン系繊維及びポリエステル繊維からなるニードルパンチ不織布の裏層を有する不織布)を用い、実施例2に係る5層構造を有するマスク(厚み:1.5mm、合計目付:125g/m2)を製造した。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例1のマスクにおいて、緩衝層を目付55g/m2、厚さ1.4mmの混合不織布(ポリエステルからなるスパンボンド不織布の表層と、アクリル系繊維及びポリエステル繊維からなるニードルパンチ不織布の裏層を有する不織布)を用い、実施例3に係る5層構造を有するマスク(厚み:1.9mm、合計目付:125g/m2)を製造した。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例1のマスクにおいて、緩衝層を目付35g/m2、厚さ0.81mmの混合不織布(エアスルー式のポリエステル、ポリエチレン及びポリプロピレンの混合不織布)を用い、実施例4に係る5層構造を有するマスク(厚み:1.3mm、合計目付:105g/m2)を製造した。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例1のマスクにおいて、最外層に隣接する位置に緩衝層を配置させ(最外層→緩衝層→フィルター層2層→口許層の順に配置)、実施例5に係る5層構造を有するマスク(厚み:1.1mm、合計目付:125g/m2)を製造した。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例1のマスクから、2層のフィルター層をのぞいたものを実施例6に係る3層構造を有するマスク(厚み:0.95mm、合計目付:105g/m2)とした。なお、不織布の厚さおよび平均繊維径の測定条件は実施例1と同じである。
実施例及び比較例に係るマスクの、圧縮特性評価を行った。併せて実施例1乃至6の緩衝層の圧縮特性評価、並びに比較例2及び3の口許層の圧縮特性評価を行った。圧縮特性評価は、カトーテック株式会社製 KESFB3-AUTO-A 自動化圧縮試験機を用いた。不織布への加圧板の面積は2.0cm2、圧縮変形速度は0.02mm/sec、最大圧縮荷重を50gf/cm2の条件で評価を行った。
圧縮特性WC、LC、RC、T0、TMの測定結果を表1に示す。
製造した実施例1、比較例1、及び比較例3に係るマスクの、官能試験評価を行った。具体的には、20代~40代の女性10人及び20代~40代の男性8人の合計18人に、実施例1、比較例1、及び比較例3に係るマスクをそれぞれ1日5時間程度着用してもらい、表2に示す評価項目及び評価基準に基づいて、評価を行った。それぞれの評価項目において該当する評価基準を選択した人数を、表2に示す。
上記マスク官能試験評価1と同様に、製造した実施例2及び実施例4、並びに比較例1、及び比較例4に係るマスクの、官能試験評価を行った。結果を表3に示す。
1 マスク本体
2 耳掛け部
3 最外層
4 フィルター層
5 緩衝層
6 口許層
Claims (6)
- 使用者の顔面の少なくとも一部を覆うマスク本体、及び該マスク本体の両側に設けられた一対の耳掛け部、を有した不織布マスクであって、
前記マスク本体は、少なくとも最外層、中間層、及び口許層を有する多層構造であり、
前記中間層として、ポリエステル系繊維、ポリプロピレン系繊維、レーヨン系繊維、アクリレート系繊維、ナイロン系繊維、アセテート系繊維、羊毛系繊維、コットン系繊維、ウレタン系繊維、およびポリエチレン系繊維から選択される少なくとも1種以上を含む不織布からなる緩衝層を含み、
前記マスク本体は、KESシステムにより測定された圧縮特性WCが0.5~2.0gf・cm/cm2である、不織布マスク。 - 前記緩衝層は、目付が30g/m2以上の不織布からなる、請求項1に記載の不織布マスク。
- 前記緩衝層は、ニードルパンチ不織布を用いたものである、請求項1又は2に記載の不織布マスク。
- 前記マスク本体は、厚みが1.0mm以上である、請求項1~3のいずれか1項に記載の不織布マスク。
- 前記口許層は、公定水分率1%以上の繊維を使用した不織布からなる、請求項1から4のいずれか1項に記載の不織布マスク。
- 前記中間層として更に捕集フィルターを1層又は2層以上含み、前記口許層と緩衝層とが隣接するよう配置される、請求項1から5のいずれか1項に記載の不織布マスク。
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WO2022163187A1 (ja) | 2021-01-28 | 2022-08-04 | 花王株式会社 | 衛生マスク用シート |
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KR102130647B1 (ko) * | 2019-12-18 | 2020-07-07 | 김형준 | 다목적 응급 두건 |
CN111393732A (zh) * | 2020-04-02 | 2020-07-10 | 广州敬信高聚物科技有限公司 | 一种口罩全塑鼻梁条聚烯烃改性材料及其制备方法 |
CN111671184A (zh) * | 2020-06-21 | 2020-09-18 | 欧意控股有限公司 | 一种具有防透气干爽的口罩内层材料及制备方法 |
KR102442197B1 (ko) * | 2020-07-08 | 2022-09-08 | (주)레스텍 | 이산화티타늄을 포함하는 항균탈취 마스크 |
US20220079272A1 (en) * | 2020-09-11 | 2022-03-17 | Huizhou Lixing Textile Co., Ltd. | Antibacterial deodorant quick-drying mask |
KR102379237B1 (ko) * | 2021-03-04 | 2022-03-24 | 김효진 | 3중 마스크 |
KR102407033B1 (ko) * | 2022-01-20 | 2022-06-10 | 주식회사 세이빙스토리 | 생명구조타올 시트 및 이의 제조방법 및 생명구조타올 시트를 포함하는 생명구조타올 |
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EP2644761B1 (en) * | 2010-11-22 | 2018-04-04 | Kao Corporation | Bulky sheet and method for producing same |
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- 2016-06-10 JP JP2016559379A patent/JP6143972B2/ja active Active
- 2016-06-10 KR KR1020177035330A patent/KR20180017025A/ko not_active Application Discontinuation
- 2016-06-10 WO PCT/JP2016/067314 patent/WO2016199883A1/ja active Application Filing
- 2016-06-13 TW TW105118392A patent/TW201710082A/zh unknown
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2022163187A1 (ja) | 2021-01-28 | 2022-08-04 | 花王株式会社 | 衛生マスク用シート |
JP2022115800A (ja) * | 2021-01-28 | 2022-08-09 | 花王株式会社 | 衛生マスク用シート |
JP7218076B2 (ja) | 2021-01-28 | 2023-02-06 | 花王株式会社 | 衛生マスク用シート |
KR20230113648A (ko) | 2021-01-28 | 2023-07-31 | 카오카부시키가이샤 | 위생 마스크용 시트 |
TWI821822B (zh) * | 2021-01-28 | 2023-11-11 | 日商花王股份有限公司 | 衛生口罩用片材 |
Also Published As
Publication number | Publication date |
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TW201710082A (zh) | 2017-03-16 |
JP6143972B2 (ja) | 2017-06-07 |
KR20180017025A (ko) | 2018-02-20 |
CN107734987A (zh) | 2018-02-23 |
JPWO2016199883A1 (ja) | 2017-06-22 |
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