WO2016052401A1 - Masque hygiénique - Google Patents

Masque hygiénique Download PDF

Info

Publication number
WO2016052401A1
WO2016052401A1 PCT/JP2015/077316 JP2015077316W WO2016052401A1 WO 2016052401 A1 WO2016052401 A1 WO 2016052401A1 JP 2015077316 W JP2015077316 W JP 2015077316W WO 2016052401 A1 WO2016052401 A1 WO 2016052401A1
Authority
WO
WIPO (PCT)
Prior art keywords
base material
material layer
layer
less
sheet
Prior art date
Application number
PCT/JP2015/077316
Other languages
English (en)
Japanese (ja)
Inventor
東城　武彦
秀介 垣内
金田　学
祥悟 千葉
圭二 吉井
洋平 志村
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015161820A external-priority patent/JP6571448B2/ja
Priority claimed from JP2015176040A external-priority patent/JP5961738B2/ja
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to KR1020177008797A priority Critical patent/KR102365235B1/ko
Priority to CN201580052501.7A priority patent/CN107073303B/zh
Publication of WO2016052401A1 publication Critical patent/WO2016052401A1/fr

Links

Images

Classifications

    • 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
    • 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
    • A62B18/025—Halfmasks
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • 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
    • 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

Definitions

  • the present invention relates to a sanitary mask having light permeability and bacterial barrier properties.
  • Patent Document 1 proposes a mask in which a mask body is made of a cloth-like material having transparency that allows the face portion to be seen through and air permeability, and Patent Document 2 is made of a synthetic filament and repels it.
  • Patent Document 2 proposes a mask having a mask body made of a transparent woven fabric subjected to water treatment.
  • Patent Document 2 the degree of the blockage of the splash is evaluated by examining the ratio of the amount of water droplets reaching the corrugated cardboard installed at the rear by spraying mist-like water droplets with a household spray spray on a vertically suspended sample.
  • the particle size of the water droplets produced by the spray spray used is also unknown. Therefore, even if the evaluation result is good, for example, when barrier performance is evaluated using BFE (Bacterial Filtration Efficiency) as an index used for performance evaluation of medical masks, the barrier property is high. I can not say.
  • BFE Bactration Efficiency
  • Patent Document 3 describes the use of nanofibers for pollen prevention masks.
  • the pollen prevention mask in addition to the nanofiber nonwoven fabric layer having an average fiber diameter of 1 nm to 1000 nm, it is essential to provide a microfiber nonwoven fabric or woven fabric layer having an average fiber diameter of 1 ⁇ m to 100 ⁇ m.
  • No. 3 describes nothing about enabling the mask to be seen through and setting the parallel light transmittance as a whole to 10% or more.
  • Patent Document 4 a woven fabric composed only of ground yarn is laminated on one surface of a polyester film, and a thick fabric having a thickness 2 to 5 times that of the ground yarn is laminated on the other surface.
  • a laminated body in which woven fabrics in which yarns are put in a lattice pattern with respect to the ground yarn are laminated. In this laminated body, the moire phenomenon generated by the overlap of the ground yarns is canceled by arranging the thick yarns in a lattice pattern.
  • Patent Document 5 also proposes a laminate in which a woven fabric is laminated on both sides of a polyester film having a total light transmittance of 50% or less as a laminate that prevents the moire phenomenon.
  • this laminate by limiting the total light transmitted light, the interference phenomenon of light generated in the laminate of the film and the fabric is weakened, and the occurrence of the moire phenomenon is prevented.
  • Patent Document 6 describes a fabric material composite structure having one or more nanofiber layers and a synthetic single yarn precision fabric knitted at right angles. The nanofiber layer is sandwiched between two synthetic single yarn precision fabrics. This fabric material composite structure is used as a filtration means or medium. In this document, there is no mention of the moire phenomenon that occurs due to the use of two synthetic single yarn precision fabrics.
  • An object of the present invention is to provide a sanitary mask that can eliminate the drawbacks of the above-described conventional technology.
  • Another object of the present invention is to improve a filter medium. More specifically, the present invention provides a filter medium that has high transparency, effectively prevents the occurrence of moire phenomenon, and has excellent particulate filtration performance. It is in.
  • the present invention relates to a sanitary mask in which a face covering portion is composed of a laminated sheet in which a base material layer and a nanofiber layer are laminated.
  • the base material layer is laminated on one side or both sides of the nanofiber layer and has regularly formed through holes.
  • the parallel sheet has a parallel light transmittance of 10% or more.
  • the nanofiber layer includes nanofibers having a fiber diameter of 350 nm or less and a basis weight of 0.50 g / m 2 or less (hereinafter referred to as the present invention when referred to as the first invention).
  • the present invention is arranged between a first base material layer having a plurality of regularly formed through holes, a second base material layer having a plurality of regularly formed through holes, and both base material layers.
  • the present invention relates to a light-transmitting fine particle filter material comprising a laminated sheet including a nanofiber filtration layer.
  • the laminated sheet has a total light transmittance of 55% or more.
  • the value of the moire cycle W generated due to the mutual interference between the through hole formed in the first base material layer and the through hole formed in the second base material layer is 5000 ⁇ m or less (hereinafter referred to as the second base material layer).
  • the term invention refers to this invention).
  • this invention relates to the said sanitary mask provided with the said light transmissive fine particle filter material.
  • the face covering portion is preferably made of the light-transmitting fine particle filtering material of the second invention.
  • FIG. 1 is a front view of an embodiment of the sanitary mask of the present invention.
  • FIG. 2 is a perspective view showing a state in which the sanitary mask shown in FIG. 1 is worn.
  • FIG. 3 is a schematic cross-sectional view showing an example of a laminated sheet used in the sanitary mask of the present invention.
  • FIG. 4 is a schematic cross-sectional view showing another example of a laminated sheet used in the sanitary mask of the present invention.
  • FIGS. 5 (a) to 5 (c) are diagrams showing an example of a mesh sheet used as a constituent material of the base material layer, FIG. 5 (a) is an enlarged plan view, and FIG. 5 (b) is FIG.
  • FIG. 5A is a sectional view taken along line AA in FIG.
  • FIG. 5A, and FIG. 5C is a sectional view taken along line BB in FIG.
  • FIG. 6 is an enlarged plan view showing an example of a perforated sheet used as a constituent material of the base material layer.
  • 7 (a) and 7 (b) are diagrams showing another embodiment of the sanitary mask of the present embodiment, and FIG. 7 (a) is a state in which the three-dimensional sanitary mask is developed (notched portion).
  • FIG. 7B is a diagram showing a state in which the sanitary mask is folded, as viewed from the non-skin contact surface side.
  • 8 (a) to 8 (c) are views showing the mask body of the sanitary mask shown in FIG. 7, and FIG. 8 (a) is a front view of the mask body as viewed from the skin contact surface side.
  • FIG. 9 is a view showing a laminated structure of another example of a mask main body used in the sanitary mask of the present invention.
  • FIG. 10 is an exploded perspective view showing an embodiment of the filter medium of the present invention.
  • Fig.11 (a) is a principal part enlarged view in the planar view of the 1st base material layer in a filter medium
  • FIG.11 (b) is principal part enlarged view in the planar view of the 2nd base material layer in a filter medium.
  • FIG. 12A to FIG. 12G are schematic views showing one arrangement mode of the first and second base material layers in the filter medium.
  • or FIG.13 (g) is a schematic diagram which shows another arrangement
  • FIG. 14A to FIG. 14G are schematic views showing still another arrangement mode of the first and second base material layers in the filter medium.
  • FIG. 15 is a front view showing a sanitary mask using a filter medium. 16 is a perspective view showing a state in which the sanitary mask shown in FIG. 15 is attached.
  • a sanitary mask 1 includes a mask body 2 and ear hooks 3 provided on both the left and right sides of the mask body 2 as shown in FIGS. 1 and 2.
  • the mask body 2 has a horizontally long rectangular shape.
  • the central portion of the mask body 2 excluding the lateral end portions is a face covering portion 4 that covers the wearer's face as shown in FIG.
  • the portion 4 is composed of a laminated sheet 10A in which the base material layer 11 and the nanofiber layer 17 are laminated.
  • Side sheets 5 are attached to both end portions of the mask body 2 in the lateral direction so as to sandwich the laminated sheet 10A from both sides thereof, and the ear hooking portions 3 are formed at both end portions reinforced by the side sheets 5.
  • the ear strap 6 is fixed.
  • the face covering portion 4 preferably covers at least the mouthpiece and the periphery of the nostril of the wearer's face.
  • the side sheet 5 and the ear strap 6 are attached by a known method such as fusion by heat sealing or ultrasonic sealing, adhesion using an adhesive, or sewing.
  • the laminated sheet 10A used for the sanitary mask 1 of the present embodiment has a configuration in which a base material layer 11 and a nanofiber layer 17 are laminated.
  • the material layer 11 has a configuration in which the nanofiber layer 17 is laminated only on one side.
  • the sanitary mask 1 of the present embodiment when the mask is worn, it is designed such that the nanofiber layer 17 side of the laminated sheet 10A faces the outside and the base material layer 11 side faces the inside. It can also be designed such that the material layer 11 side faces outward and the nanofiber layer 17 side faces inward.
  • FIG. 4 shows another example of a laminated sheet that can be used in the present invention.
  • the base material layer 11 is laminated on both surfaces of the nanofiber layer 17.
  • the laminated sheet 10B can be used in place of the laminated sheet 10A of the sanitary mask 1 shown in FIGS. 1 and 2, for example.
  • the laminated sheet 10 ⁇ / b> A and the laminated sheet 10 ⁇ / b> B will be described, but common points will be collectively referred to as the laminated sheet 10.
  • the base material layer 11 in the laminated sheet 10 has regularly formed through holes from the viewpoint of enhancing the light transmittance of the face covering portion 4 and improving the visibility of the wearer's facial expression.
  • the parallel light transmittance (JIS K7105) as the laminated sheet 10 having the base material layer 11 on one side or both sides of 17 is 10% or more.
  • the base material layer 11 is used for supporting the nanofiber layer 17 whose strength and rigidity are likely to be low, and for providing the laminated sheet 10 with one or both of necessary strength and appropriate rigidity.
  • the material layer 11 has regularly formed through-holes, and the parallel light transmittance (JIS K7105) as the laminated sheet 10 is 10% or more, which is necessary for the face covering portion 4 of the mask 1. Along with strength and appropriate rigidity, it becomes easy to obtain high light transmission for obtaining high visibility of the wearer's expression. From the viewpoint of obtaining high light transmittance and high visibility of the expression of the wearer on the face covering portion 4, the parallel light transmittance (JIS K7105) of the laminated sheet 10 is preferably 15% or more, more preferably 16% or more. It is. The higher the parallel light transmittance of the laminated sheet 10 is, the better, and it may be 100%, but in reality, the upper limit is about 70%.
  • the regularly formed through-holes are, for example, ones in which holes of meshes or openings are arranged at equal intervals in a plurality of rows in the longitudinal direction, the lateral direction, or the oblique direction of the base material layer. .
  • the arrangement is like a grid.
  • whether or not the through holes formed in the base material layer 11 are regularly penetrated can be visually determined by observing with a microscope several tens of times.
  • the base material layer 11 of the laminated sheet 10 preferably has a total parallel light transmittance (JIS K7105) of 30% or more, more preferably, from the viewpoint of obtaining visibility of the wearer's facial expression excellent in a sanitary mask. Is 40% or more, more preferably 60% or more. The upper limit of the parallel light transmittance is 100%. From the same viewpoint, the laminated sheet 10 has the parallel light transmittance (JIS K7105) of each base material layer 11 of preferably 40% or more, more preferably 60% or more. The upper limit of the parallel light transmittance is 100%.
  • the total parallel light transmittance of the base material layer 11 is a single layer or multiple layers constituting the base material layer 11.
  • the parallel light transmittance is measured in accordance with the method defined in JIS K7105 using the sheet material as a measurement sample.
  • the substrate layer 11 is on both surfaces of the nanofiber layer 17 as in the laminated sheet 10B, the single-layer or multilayer sheet material constituting the one substrate layer 11 and the other substrate layer 11 are arranged. Only the single-layer or multi-layer sheet material to be formed is separately taken out, and the parallel light transmittance is measured in accordance with the method defined in JIS K7105 using a sample obtained by superimposing them as a measurement sample.
  • the total parallel light transmittance of the base material layer 11 is the same as the parallel light transmittance of each base material layer 11.
  • the base material layer 11 is on both surfaces of the nanofiber layer 17, the single-layer or multi-layer sheet material constituting one base material layer 11 and the single-layer or multi-layer material constituting the other base material layer 11.
  • a value obtained by separately measuring the sheet material as a measurement sample is the parallel light transmittance of each base material layer 11.
  • Each parallel light transmittance described above was measured under the following conditions. [Measurement conditions] After leaving the sample in an environment of 23 ° C. and 50% RH for 4 hours or longer, cut the sample into 80 mm square and use a haze meter HM-150 manufactured by Murakami Color Research Laboratory Co., Ltd. The parallel light transmittance was measured.
  • the material (sheet material) constituting the base material layer 11 is made of a synthetic resin from the viewpoint of obtaining high light transmittance by reducing light diffusibility at the interface caused by filaments and fibers together with a high strength and appropriate rigidity.
  • a mesh sheet, an aperture sheet made of synthetic resin, or a knitted or woven fabric made of synthetic resin is preferable.
  • the material (sheet material) which comprises the base material layer 11 may laminate
  • FIG. 5 shows an example of a mesh sheet made of synthetic resin
  • FIG. 6 shows an example of an aperture sheet made of synthetic resin.
  • the laminated sheet 10B shown in FIG. 4 when providing the base material layer 11 on both surfaces of the nanofiber layer 17, it is the structure of the base material layer 11 by one base material layer 11 and the other base material layer 11.
  • the material may be the same or different.
  • the laminated sheet 10 may be formed by stacking a plurality of base material layers 11 and nanofiber layers 17.
  • the vertical lines 12 and the horizontal lines 13 made of synthetic resin filament yarns are spaced apart from each other. They keep one another and interact with each other.
  • the vertical line 12 and the horizontal line 13 intersect with each other in a twill pattern instead of the vertical line 12 and the horizontal line 13 that intersect with each other in a plain weave pattern (see FIG. (Not shown) can also be used.
  • the synthetic resin mesh sheet has a mesh number (number of lines / inch) of preferably 30 or more and 200 or less, more preferably 50 or more and 150 or less, from the viewpoint of protecting the laminated nanofibers and transparency. It is.
  • the wire diameter of the mesh is preferably 20 ⁇ m or more and 500 ⁇ m or less, more preferably 30 ⁇ m or more and 200 ⁇ m or less, from the viewpoint of appropriate rigidity.
  • the mesh opening ratio (%) is preferably 30% or more and 90% or less, more preferably 50% or more and 80% or less, from the viewpoint of reducing ventilation resistance.
  • various synthetic resins such as polyolefin resin, polyester resin, and polyamide resin are preferably used.
  • the intersection of the vertical line 12 and the horizontal line 13 may be fused by heat fusion or the like, or may not be fused, but is fused from the viewpoint of preventing fraying of the cut surface. It is preferable. It is preferable that the filament superior in the intersection fusion is formed of a plurality of resins having different melting points and the cross section is arranged in a core-sheath type. In particular, a resin having a low melting point is preferably disposed on the sheath side. Further, the filament yarn constituting the vertical line 12 and the horizontal line 13 may be a multifilament or a monofilament, and is preferably a solid fiber.
  • An aperture sheet that is preferably used as a constituent material of the base material layer 11 is obtained by forming apertures 16 in a regular pattern on a synthetic resin sheet, such as an aperture sheet 11B shown in FIG.
  • Examples of a method for forming the opening 16 include punching such as punching.
  • the perforated sheets are arranged in a staggered manner instead of the perforated sheets arranged in two directions intersecting each other, as shown in FIG. 6. A thing (not shown) etc. can also be used.
  • the apertured sheet has a thickness of preferably 30 ⁇ m or more and 700 ⁇ m or less, more preferably 50 ⁇ m or more and 500 ⁇ m or less, from the viewpoint of achieving both strength and softness.
  • the same material as that of the mesh sheet described above can be used without particular limitation.
  • the synthetic resin knitted fabric or woven fabric preferably used as the constituent material of the base material layer 11 is, for example, a synthetic resin filament yarn made into a sheet by plain weaving, twill weaving, rubber knitting, pearl knitting, or the like.
  • a filament yarn similar to the filament yarn used for the mesh sheet can be used.
  • the constituent material (sheet material) of the base material layer 11 is a mesh sheet mesh 14, aperture sheet aperture 16, etc. from the viewpoint of obtaining the face covering portion 4 with high light transmittance as well as necessary strength and appropriate rigidity.
  • the area per through hole is preferably 0.02 mm 2 or more, more preferably 0.04 mm 2 or more, and preferably 25 mm 2 or less, more preferably 20 mm 2 or less. is 0.02 mm 2 or more 25 mm 2 or less, more preferably 0.04 mm 2 or more 20 mm 2 or less.
  • the base layer 11 of the laminated sheet 10 has a total Taber stiffness of preferably 0.03 mN ⁇ from the viewpoint of imparting an appropriate rigidity to the laminated sheet 10 so as not to be deformed by ventilation resistance due to breathing when the mask is attached. m or more, more preferably 0.3 mN ⁇ m or more, and preferably 3.0 mN ⁇ m or less, preferably 0.03 mN ⁇ m or more and 3.0 mN ⁇ m or less, more preferably 0. 3 mN ⁇ m to 3.0 mN ⁇ m. Taber stiffness is measured by the “stiffness test method” defined in JIS P8125-2000.
  • the total Taber stiffness of the base material layer 11 is a single-layer or multi-layer sheet constituting the base material layer 11 when the base material layer 11 is only on one side of the nanofiber layer 17 as in the laminated sheet 10A. Using the material as a measurement sample, the Taber stiffness is measured according to the method specified in JIS P8125-2000. On the other hand, when the substrate layer 11 is on both surfaces of the nanofiber layer 17 as in the laminated sheet 10B, the single-layer or multilayer sheet material constituting the one substrate layer 11 and the other substrate layer 11 are arranged. The single-layer or multi-layer sheet material to be formed is taken out separately, and the taber stiffness is measured in accordance with the method defined in JIS P8125-2000 using the superposed samples as measurement samples.
  • the nanofiber layer 17 includes nanofibers having a fiber diameter of a predetermined value or less. That is, the nanofiber constituting the nanofiber layer 17 has a fiber diameter of 350 nm or less, preferably a fiber diameter of 250 nm or less, more preferably a fiber diameter of 220 nm or less.
  • the laminated sheet 10 has high light transmittance and excellent visibility of the wearer's facial expression, and also has excellent barrier properties against bacteria and pollen. .
  • the fiber diameter of the nanofiber is preferably 10 nm or more, and more preferably 50 nm or more, from the viewpoint of actually creating the fiber.
  • the nanofiber layer 17 is preferably composed only of nanofibers having a fiber diameter of 350 nm or less, and more preferably composed only of nanofibers having a fiber diameter of 250 nm or less or 220 nm or less.
  • the nanofiber layer 17 includes, in addition to nanofibers, other fibers that are thicker than nanofibers having a fiber diameter of 350 nm, 250 nm, or 220 nm or less. It is not hindered to contain the ingredients.
  • the fiber diameter of the nanofiber is a diameter or equivalent circle diameter, and the thickness of the nanofiber can be measured, for example, by observation with a scanning electron microscope (SEM).
  • the basis weight of the nanofiber layer 17 is important in addition to the fiber diameter of the nanofibers constituting the nanofiber layer.
  • the laminated sheet 10 can be provided with high light transmittance and excellent barrier properties against bacteria and pollen.
  • the basis weight of the nanofiber layer 17 is 0.50 g / m 2 or less, preferably 0.40 g / m 2 or less, and preferably the 0.05 g / m 2 or more, more preferably 0.10 g / m 2 or more, more specifically, preferably 0.05 g / m 2 or more 0.50 g / m 2 or less, more preferably 0. It is 10 g / m 2 or more and 0.40 g / m 2 or less.
  • the basis weight of the nanofiber layer 17 in the laminated sheet 10 can be measured by the following method. After cutting the laminated sheet into a 10 cm square size and measuring the mass, the mass of only the base material layer from which the nanofiber layer has been completely removed is measured, and the mass of the nanofiber layer 17 is subtracted from the mass of the laminated sheet. And The basis weight is calculated by area conversion (the obtained number is multiplied by 100).
  • the length of the nanofiber is not critical in the present invention, and a length corresponding to the manufacturing method of the nanofiber can be used.
  • the nanofiber may exist in a state oriented in one direction in the nanofiber layer 17 or may face a random direction. From the viewpoint of improving the light transmittance of the laminated sheet 10.
  • the nanofiber layer 17 has a nanofiber orientation degree of preferably 0.05 or more, more preferably 0.06 or more, preferably 1.00 or less, more preferably 0.90 or less. More specifically, it is preferably 0.05 or more and 1.00 or less, more preferably 0.06 or more and 0.90 or less.
  • the degree of orientation of the nanofiber is measured by the following method. Using a scanning electron microscope (SEM), three 1000 ⁇ images of only the nanofibers at arbitrary locations are taken. The image is image-analyzed using image processing software (A image-kun made by Asahi Kasei Engineering Co., Ltd.), and the numerical value calculated by the moment method is defined as the degree of orientation.
  • SEM scanning electron microscope
  • the nanofibers are coupled at their intersection or the nanofibers are intertwined. Whether the nanofibers are coupled or intertwined depends on the method of manufacturing the nanofiber layer 17.
  • Nanofibers are made from polymer compounds.
  • the polymer compound any of natural polymers and synthetic polymers can be used.
  • the polymer compound may be water-soluble or water-insoluble, but is preferably water-insoluble from the viewpoint of preventing swelling or dissolution due to saliva or breath.
  • the natural polymer for example, mucopolysaccharides such as chitin, chitosan, chondroitin sulfate, heparin, keratosulfate, cellulose, pectin, and the like can be used.
  • water-soluble polymer compound means that a polymer compound is dissolved in water having a mass 10 times or more that of the polymer compound in an environment of 1 atm and room temperature (20 ° C. ⁇ 15 ° C.).
  • the “water-insoluble polymer compound” means that the polymer compound has a mass 10 times or more that of the polymer compound in an environment of 1 atm and room temperature (20 ° C. ⁇ 15 ° C.).
  • Examples of synthetic polymers include polyvinyl butyral, polystyrene, polycarbonate, polyacrylic acid, polymethyl acrylate, polyvinyl chloride, polyethylene terephthalate, polyamide 66, polyamide 46, polyurethane, polylactic acid, polycaprolactone, polyethylene glycol, polylactic acid. Glycol, polyvinyl acetate, etc. can be used.
  • the laminated sheet 10 it is preferable that no layer is interposed between the base material layer 11 and the nanofiber layer 17. Moreover, it is preferable that the base material layer 11 and the nanofiber layer 17 are integrated.
  • the laminated sheet having the base layer 11 on one side of the nanofiber layer 17 has the nanofiber layer 17 formed on the surface of the base layer 11 by a known electrospinning method.
  • a method for forming a nanofiber layer by electrospinning include, for example, JP 2008-179629 A, JP 2010-168722 A, JP 2013-28552 A, or JP 2013-119676 A. Etc. can be employed.
  • the orientation degree of nanofibers can be changed to a desired value by forming the nanofiber layer while moving the base material layer and adjusting the moving speed of the base material layer.
  • the laminated sheet 10 is laminated with a base layer 11 and a nanofiber layer 17 having a predetermined basis weight including nanofibers having a thin fiber diameter, thereby providing high light transmittance with necessary strength and appropriate rigidity. Have.
  • the laminated sheet 10 is also excellent in air permeability.
  • the sanitary mask of the present invention uses such a laminated sheet 10 for the face covering portion, so that it has high light transmittance and excellent visibility of the wearer's facial expression, as well as excellent barrier properties against bacteria and pollen.
  • the sanitary mask of the present invention can be easily reduced in weight, and can provide a sanitary mask that is lighter than a conventional non-woven fabric mask that is commercially available and that does not bother to be worn.
  • the barrier property can be expressed with a nanofiber having a small basis weight, it is advantageous in that it is difficult to breathe.
  • the total mass is preferably less than 2 g, more preferably 1.5 g or less, and 0.7 g or more from the viewpoint of making it difficult to feel wearing. More specifically, it is preferably 0.7 g or more and less than 2.0 g, more preferably 0.7 g or more and 1.5 g or less. The barrier property becomes better as the fiber diameter is smaller and the basis weight is larger.
  • the total basis weight of the base material layer 11 and the nanofiber layer 17 is configured such that the base material layer 11 is laminated only on one side of the nanofiber layer 17 (for example, a laminated sheet 10A).
  • m 2 or more and 30 g / m 2 or less more preferably 15 g / m 2 or more and 25 g / m 2 or less.
  • the base material layer 11 is laminated on both surfaces of the nanofiber layer 17 (for example, in the case of the laminated sheet 10B), it is preferably 16 g / m 2 or more, more preferably 30 g / m 2 or more, and preferably 60 g. / M 2 or less, more preferably 50 g / m 2 or less, more specifically, preferably 16 g / m 2 or more and 60 g / m 2 or less, more preferably 30 g / m 2 or more and 50 g / m 2 or less.
  • the sanitary mask of the present invention has a bacterial barrier property, and is a mask mainly used for prevention of infectious diseases such as colds and countermeasures against the spread of infectious diseases, and a mask used in the medical field including surgery.
  • a mask mainly used for prevention of infectious diseases such as colds and countermeasures against the spread of infectious diseases
  • a mask used in the medical field including surgery Preferably used.
  • Other masks mainly used to prevent the inhalation of pollen and house dust masks used in food fields such as food manufacturing, cooking, and lunch box manufacturing, masks used in clean rooms for semiconductor manufacturing, It is also suitably used as a mask used for dust prevention in the field.
  • sanitary mask 1C that is another embodiment of the present invention will be described.
  • the sanitary mask 1C is different from the sanitary mask 1 described above in the shape and configuration of the mask body.
  • the sanitary mask 1C will be described with a focus on the points different from the sanitary mask 1, that is, the shape and configuration of the mask body. The description is omitted.
  • the sanitary mask 1C includes a mask main body 2C and ear hooks 3 provided on both left and right sides of the mask main body 2C.
  • the mask main body 2C has a horizontally long shape, and a central portion excluding both ends in the horizontal direction is a face covering portion 4 that covers the wearer's face.
  • the mask main body 2C has a lateral direction in the state where the three-dimensional sanitary mask is developed (same as the state before joining the opposite edges of the notch portions).
  • V-shaped notches 20a and 20b are provided on the upper and lower sides of the central portion.
  • the opposite side edges of the notches 20a and 20b are joined to each other, whereby the mask body 2C in the width direction is joined.
  • An upper joint 20a ′ and a lower joint 20b ′ along the ridgeline of the nose are formed in the center portion.
  • the sanitary mask 1C is formed so as to be foldable into two at a substantially central portion where the joint portions 20a 'and 20b' are formed, and can be reduced in size when being carried. In addition, when folding in half, it is folded in half so that the surface that contacts the skin of the wearer when worn (hereinafter also referred to as the skin contact surface) is inside. Furthermore, the string fixing
  • the mask main body 2C is configured to include a laminated sheet 10B and a nonwoven fabric sheet 23 disposed at least at the peripheral edge portion on the skin contact surface side of the laminated sheet 10B.
  • the nonwoven fabric sheet 23 has a similar shape in which the outer shape is an enlargement of the laminated sheet 10B, and a frame having an opening 23a in a portion disposed inside the peripheral edge of the laminated sheet 10B. It is formed in a shape (for example, a frame shape with a central portion cut out).
  • the nonwoven fabric sheet 23 By forming the nonwoven fabric sheet 23 into a frame shape, high permeability is maintained in the laminated sheet 10B in a portion inside the peripheral edge of the laminated sheet 10B, for example, a portion covering the mouthpiece and the periphery of the nose. Moreover, the nonwoven fabric sheet 23 is extended outside from the inner side of the peripheral edge of the base material layer 11 in the skin contact surface side of the laminated sheet 10B, and the peripheral edge of the base material layer 11 touches a wearer's skin directly. There is no such thing.
  • the laminated sheet 10B is worn when the sanitary mask 1C is worn. Is not in direct contact with the wearer's skin, for example, even when a synthetic resin mesh sheet is used for the base material layer 11 as shown in FIG. (For example, tingling) is prevented.
  • the skin contact at the peripheral edge of the base material layer 11 is improved by, for example, ultrasonic welding of the cut edge, but ultrasonic welding alone may not be sufficient. In such a case, ultrasonic welding, etc. This is particularly effective when the edge processing is not performed.
  • the extension length that the nonwoven fabric sheet 23 extends outward from the inner side of the peripheral edge of the base material layer 11 is 1 mm or more and 10 mm or less from the viewpoint of improving the skin contact per end of the laminated sheet 10B with respect to the wearer. It is preferable. By setting the extending length to 1 mm or more, the base material layer 11 is less likely to contact the wearer's skin, and the wear of the wearer's skin is prevented from being deteriorated. On the other hand, when the extending length is 10 mm or less, the risk of the nonwoven fabric sheet 23 being rolled can be reduced. When the nonwoven fabric sheet 23 is rolled, the peripheral edge of the base material layer 11 is exposed to contact the wearer's skin, and the skin contact is likely to deteriorate or the feeling of use is likely to be lowered.
  • the basis weight of the nonwoven fabric sheet 23 is preferably 10 g / m 2 or more, more preferably 60 g / m 2 or less, and more specifically preferably 10 g / m 2 from the viewpoint of improving skin contact with the wearer. 2 or more and 60 g / m 2 or less.
  • the constituent material of the nonwoven fabric sheet 23 is not particularly limited, but from the viewpoint of contact with the skin of the wearer, a polyolefin fiber such as PE or PP, or a polyester fiber such as PET is used alone as a core-sheath type composite fiber or the like. be able to.
  • the Taber stiffness of the nonwoven fabric sheet 23 is preferably 0.01 mN ⁇ m or more, preferably 1.0 mN ⁇ m or less, more specifically preferably 0.01 mN ⁇ m or more and 1.0 mN ⁇ m or less. It is.
  • the average fiber diameter of the nonwoven fabric sheet 23 is preferably 0.5 ⁇ m or more, preferably 30 ⁇ m or less, and more specifically preferably 0.5 ⁇ m or more and 30 ⁇ m or less.
  • the folding process it is preferable to perform the folding process so that the skin contact surface side of the nonwoven fabric sheet does not become wrinkles. Further, from the viewpoint of appearance, it is preferable to perform the folding process so that the non-skin contact surface side of the folded nonwoven fabric sheet does not become wrinkles.
  • FIG. 9 shows a modification of the sanitary mask 1C.
  • a nonwoven sheet that improves the skin contact of the base material layer to the wearer by providing it on the skin contact surface side of the laminated sheet in a state extending outward from the inside of the peripheral edge of the base material layer. May have a shape that does not have the opening 23a arranged on the inner side of the peripheral portion on the skin contact surface side of the laminated sheet, and may have a similar shape in which the laminated sheet is enlarged as shown in FIG. For example, it is good also as a similar sheet shape which expanded the lamination sheet.
  • the nonwoven fabric sheet 24 By making the shape of the nonwoven fabric sheet 24 into a similar sheet shape obtained by enlarging the laminated sheet, the nonwoven fabric sheet 24 can be positioned on the entire skin contact surface side of the wearer and improve the wearer's skin contact. it can.
  • the basis weight of the nonwoven fabric sheet 24 is 20 g / m 2 or less from the viewpoint of enhancing the light transmittance of the face covering portion in the sanitary mask and ensuring the visibility of the expression of the wearer.
  • a laminated sheet 10A may be used as shown in FIG.
  • the nonwoven fabric sheet 24 may be disposed on the nanofiber layer 17 side in the laminated sheet 10A, or may be disposed on the base material layer 11 side. That is, the nanofiber layer 17 may be the outermost layer, or the nanofiber layer 17 may be sandwiched between the base material layer 11 and the nonwoven fabric sheet 24.
  • the laminated sheet 10 when used for the mask body, one or a plurality of folded portions (ridges) may be formed in the laminated sheet 10 as in the mask shown in FIG. .
  • left and right panel portions made of the laminated sheet 10 may be formed, and these panel portions may be joined non-linearly at the center of the face in the width direction to form a three-dimensional face covering portion.
  • the ear hook portion may be formed of a sheet material in which an opening or a slit is formed instead of the ear hook string.
  • the ear strap 6 may be made of a light transmissive member. By configuring the ear strap 6 with a light-transmitting member, it is possible to further improve the transparency and appearance of the sanitary mask 1 as a whole.
  • a light-transmitting member used for the ear strap 6 an elastomer such as polyurethane or polyolefin can be used.
  • the total light transmittance of the ear strap 6 is, for example, preferably 60% or more, and preferably 99% or less, more specifically, preferably 60% or more and 99% or less. The higher the better.
  • the frame-shaped nonwoven fabric sheet 23 has a portion that overlaps with the edges of the notches 20a and 20b.
  • the non-woven fabric sheet 23 may not have a portion that overlaps the edges of the notches 20a and 20b.
  • the filter medium 100 shown in FIG. 10 is a sheet-like thing, and has the filter layer 130 as one of the structural members.
  • the filtration layer 130 is a sheet-like material, and the first base material layer 110 is disposed on one surface thereof, and the second base material layer 120 is disposed on the other surface.
  • the first base material layer 110 and the second base material layer 120 are also sheet-like.
  • the filtration layer 130 is sandwiched between the first base material layer 110 and the second base material layer 120.
  • the filtration layer 130 and the first base material layer 110 are in direct contact with each other, and no other layer is interposed therebetween.
  • the filtration layer 130 and the second base material layer 120 are in direct contact with each other, and no other layer is interposed therebetween.
  • the filtration layer 130 is used in the filter medium 100 for the purpose of collecting fine particles contained in a fluid that is an object to be filtered.
  • the filtration layer 130 comprises nanofibers. Since the filtration layer 130 includes nanofibers, fine particles, for example, particles having an average particle diameter of 0.3 ⁇ m or more are collected without increasing pressure loss, in other words, without increasing ventilation resistance. It becomes possible to do.
  • the nanofiber is a fiber having a diameter of generally 10 nm to 3000 nm, particularly 10 nm to 1000 nm. The thickness of the nanofiber is observed, for example, with a scanning electron microscope (SEM) by magnifying the fiber at a magnification of 10,000 times.
  • SEM scanning electron microscope
  • the diameter of the nanofiber is preferably 50 nm or more, more preferably 900 nm or less, and further preferably 300 nm or less.
  • the diameter of the nanofiber is preferably 50 nm or more and 900 nm or less, and more preferably 50 nm or more and 300 nm or less. It is preferable that all of the filtration layer 130 is composed of nanofibers, but fibers other than nanofibers may be included in the filtration layer 130 as long as the filtration function is not impaired.
  • the nanofibers constituting the filtration layer 130 may be in the form of continuous filaments or short fibers.
  • the form of the nanofiber often depends on the method of manufacturing the nanofiber. Regardless of the form of the nanofibers, it is preferable that the nanofibers constitute the filtration layer 130 in a state of being randomly deposited. It is not easy to quantify the size of the nanofiber openings (mesh size) in such a random deposition state. Therefore, in the present invention, the scale of the opening size of the nanofiber is replaced with the thickness of the nanofiber and the basis weight of the nanofiber.
  • the basis weight of the nanofiber for the basis weight of the nanofiber, and more preferably is preferably 0.05 g / m 2 or more and 0.1 g / m 2 or more .
  • the upper limit is preferably 0.5 g / m 2 or less, and more preferably 0.3 g / m 2 or less.
  • the basis weight of the nanofiber may be at 0.05 g / m 2 or more 0.5 g / m 2 or less is preferable, 0.1 g / m 2 or more 0.3 g / m 2 or less Further preferred.
  • the basis weight of the filtration layer 130 composed of nanofibers can be measured by the following method.
  • the filter medium 100 is cut into a size of 10 cm square and used as a measurement sample. The mass of this sample is then measured. Nanofibers are completely removed from the sample, and the masses of only the first base material layer 110 and the second base material layer 120 are measured. The mass of the first base material layer 110 and the second base material layer 120 is subtracted from the mass of the filter medium 100, and the value is defined as the mass of the filter layer 130.
  • the mass of the filtration layer 130 per 1 m 2 is obtained, and the value is defined as the basis weight of the filtration layer 130.
  • Nanofibers are generally composed of polymer compounds. It is advantageous that the polymer compound used has fiber-forming ability and is insoluble in the fluid to be filtered. Although it depends on the type of fluid, generally, a polyolefin resin, a polyester resin, a polyamide fiber, an acrylic resin, a vinyl resin, and any blends and copolymers thereof can be used as the polymer compound. Examples of methods for producing nanofibers using these polymer compounds include an electrospinning method and a melt blown method.
  • the first base material layer 110 and the second base material layer 120 that sandwich the filtration layer 130 from each side thereof support the filtration layer 130 that is a thin layer and has poor shape retention, and the filtration of the filtration layer 130. It is used for the purpose of fully expressing the function. For this purpose, it is preferable to use the first base material layer 110 and the second base material layer 120 having a larger opening than the filtration layer 130.
  • the first base material layer 110 and the second base material layer 120 each independently have a plurality of regularly formed through holes 140.
  • the shape of the through hole 140 is to ensure the permeability of the fluid to be filtered, the support of the filtration layer 130, the light permeability of the filter medium 100, and the strength of the first base material layer 110 and the second base material layer 120. From the point of view, quadrilaterals such as right-angled quadrilaterals such as rectangles and squares and non-perpendicular parallelograms are preferred.
  • FIG. 10 shows a through hole 140 that is rectangular or square.
  • FIGS. 11A and 11B show a state in which the first base material layer 110 and the second base material layer 120 in which the through holes 140 are square are viewed in a plan view.
  • the first base material layers 110 are each independently a first partition portion 111 extending linearly along the first direction X, and a second direction Y orthogonal to the first partition portion 111.
  • a second partition 112 extending linearly along the line.
  • a quadrangular through-hole 140 partitioned by the partition sections 111 and 112 is formed in the first base material layer 110.
  • the first partition portions 111 extend in the first direction X in parallel with each other.
  • the 2nd division part 112 is extended toward the 2nd direction Y orthogonal to the direction where the 1st division part 111 is extended in parallel with each other.
  • Each partition 111, 112 has the same width along the extending direction at an arbitrary position.
  • the through-hole 140 having a square shape has a pair of sides extending in parallel with the first direction X, and the other pair of sides in parallel with the second direction Y. It extends to.
  • the opening pitches ⁇ 111 and ⁇ 112 are the widths d 111 and d 112 of the first partition portion 111 or the second partition portion 112 and the opening lengths of the through holes 140 along the width direction. Is defined as the sum of D 111 and D 112 .
  • the structure of the 2nd base material layer 120 is the same as that of the 1st base material layer 110, and as shown in FIG.11 (b), each 2nd base material layer 120 is linearly along the 1st direction X, respectively.
  • the first partition 121 extends, and the second partition 122 extends linearly along a second direction Y orthogonal to the first partition 121.
  • a quadrilateral through hole 140 partitioned by the partition sections 121 and 122 is formed in the second base material layer 120.
  • the first partition parts 121 extend in the first direction X in parallel with each other.
  • the 2nd division part 122 is extended toward the 2nd direction Y orthogonal to the direction where the 1st division part 121 is extended in parallel with each other.
  • Each partition part 121,122 has the same width along the extending direction at an arbitrary position. Accordingly, the through-hole 140 having a square shape has a pair of sides extending in parallel with the first direction X, and the other pair of sides in parallel with the second direction Y. It extends to. As shown in FIG. 11B, the opening pitches ⁇ 121 and ⁇ 122 are the widths d 121 and d 122 of the first partition part 121 or the second partition part 122 and the opening length of the through hole 140 along the direction of the width. Is defined as the sum of D 121 and D 122 .
  • the first partition portions 111 and 121 and the second partition portions 112 and 122 of the first base material layer 110 and the second base material layer 120 may be each independently a linear material made of a polymer material, for example.
  • the 1st division part 111,121 and the 2nd division part 112,122 may each independently be a strip
  • both base material layers so that the 1st division part 111 of the 1st base material layer 110 and the 1st division part 121 of the 2nd base material layer 120 may become the same direction. 110 and 120 are overlapped.
  • the two base material layers 110 and 120 have the first partition portions 111 and 121 and the second partition portions 112 and 122, respectively.
  • a moire phenomenon may occur due to mutual interference.
  • the occurrence of the moiré phenomenon may contribute to a decrease in the appearance of the filter medium 100, and thus may affect the light transmittance of the filter medium 100.
  • the generated moire cycle W is less than a specific value, specifically, 5000 ⁇ m or less in the filter medium 100. It has been found that the deterioration of the appearance due to the occurrence of moire is greatly suppressed.
  • the value of the moire cycle W is 3200 ⁇ m or less, the deterioration of the appearance of the filter medium 100 is further greatly suppressed.
  • the value of the moire cycle W is particularly preferably 1400 ⁇ m or less, and 800 ⁇ m. More preferably, it is as follows. As will be described later, for example, when the crossing angle between the first partition portion 111 in the first base material layer 110 and the first partition portion 121 in the second base material layer 120 is appropriately adjusted, the value of the moire cycle W is particularly 1500 ⁇ m.
  • the lower limit value of the moire cycle W is not particularly limited. The smaller the smaller the moire cycle W, the more difficult the appearance of the filter medium 100 deteriorates. However, when the value of the moire cycle W is reduced to about 300 ⁇ m, the object of the present invention is sufficiently achieved.
  • the moire cycle W is a cycle of interference fringes caused by a moire phenomenon.
  • the moire period W generated in the filter medium 100 is measured by measuring the opening pitch in the base material layers 110 and 120 and the crossing angle between the partition portions in the base material layers 110 and 120 with a microscope or the like. Based on the calculation formula described later.
  • the moire cycle W can also be obtained by image analysis of the generated moire interference fringes. For example, (i) Moire interference fringes are photographed with a digital camera, and the interval between the moire interference fringes is measured by image processing software or the like. (Ii) The period of light and dark portions generated by the moire interference fringes is obtained by Fourier transform.
  • the moire cycle W can be obtained by such a method.
  • the opening pitches ⁇ 111 , ⁇ 121 , ⁇ 112 , and ⁇ 122 in the respective base material layers 110 and 120 are appropriately adjusted, or the first base material layer What is necessary is just to adjust appropriately the intersection angle of the 1st division part 111 in 110, and the 1st division part 121 in the 2nd base material layer 120, for example. Specific examples thereof will be described later.
  • the opening pitches ⁇ 111 , ⁇ 112 , ⁇ 121 , and ⁇ 122 of the base material layers 110 and 120 used for the calculation are fixed to the sample stage using adhesive tape, and a microscope or the like is used. Magnify the image and obtain it by image analysis of the two-dimensional image. As shown in FIGS. 11A and 11B, the opening pitches ⁇ 111 and ⁇ 121 along the extending direction of the second partition portions 112 and 122 of the base material layers 110 and 120, and the first partition portions 111 and 121 , respectively.
  • the opening pitches ⁇ 112 and ⁇ 122 along the direction in which the first and second sections extend are drawn in a direction perpendicular to the direction in which the partition sections extend, and the width of the first partition sections 111 and 121 or the second partition sections 112 and 122 It is obtained by directly measuring the sum of the opening lengths of the through holes 140 along the direction. Measure the opening pitch at 10 arbitrarily selected locations and find the average value.
  • the crossing angle ⁇ is obtained by fixing the four corners to the sample stage using an adhesive tape in a state where the base material layers 110 and 120 are overlapped, magnifying using a microscope or the like, and analyzing the two-dimensional image. To do.
  • FIG. 12A when the first base material layer 110 and the second base material layer 120 are overlapped so that the first partition portions 111 and 121 face the same direction, FIG.
  • the moire phenomenon may occur for the six combinations shown in FIG. 12G, and it is necessary to obtain the moire cycle W for these six combinations.
  • the through holes 140 in the first base material layer 110 and the second base material layer 120 are square, and each opening pitch in each combination is ⁇ a (opening pitch of the first base material layer 110), ⁇ b (second base When the opening pitch of the material layer 120), ⁇ a ⁇ b , and the crossing angle between the partition portions is ⁇ , the moire cycle W for the six combinations is expressed by the following equation (1). For the ⁇ a , ⁇ b , and ⁇ in the equation, the values of the opening pitch and the crossing angle of each combination obtained by the procedure described in the previous paragraph are substituted.
  • the moire cycle can be considered in the same manner as the “beat” cycle generated by the overlap of two waves such as sound waves.
  • the beat is caused by the interference of two waves having a close period. Therefore, when ⁇ b is a multiple of ⁇ a closer to ⁇ b than 1.5 ⁇ a ⁇ b Therefore, it is necessary to consider the interference of these pitches. Therefore, when obtaining the moire cycle W, the value of ⁇ an used in the equation (1) is “ a multiple of ⁇ a closest to ⁇ b ”.
  • the “multiple of ⁇ a closest to ⁇ b ” can be easily derived by using, for example, the Microsoft® (registered trademark) MROUND function of Microsoft (registered trademark).
  • the moire period W is calculated for each of the six combinations, and the largest moire period W among these values satisfies the above-described value, whereby the appearance of the filter medium 100 is improved.
  • FIG. 13 shows a state in which the first base material layer 110 and the second base material layer 120 are arranged in different modes.
  • the first base unit 111 is formed such that the first partition part 111 of the first base material layer 110 and the first partition part 121 of the second base material layer 120 intersect at an angle of 45 degrees.
  • the material layer 110 and the second base material layer 120 are laminated.
  • the moire phenomenon may occur for the six combinations shown in FIGS. 13B to 13G, and it is necessary to obtain the moire cycle W for the six combinations.
  • the through holes 140 in the first base material layer 110 and the second base material layer 120 are square, and the opening pitches in each combination are ⁇ a and ⁇ b , respectively. 13 (b) to 13 (g), FIG.
  • FIG. 14 shows an aspect in which the first base material layer 110 and the second base material layer 120 are laminated in a more complicated form than FIGS. 12 and 13.
  • the first partition portion 111 and the second partition portion 112 are orthogonal to each other, and a square through hole 140 is formed.
  • the second partition 122 intersects the first partition 121 at an intersecting angle of 45 degrees, and a rhomboid through hole 140 is formed.
  • the moire phenomenon may occur for the six combinations shown in FIGS. 14B to 14G, and it is necessary to obtain the moire cycle W for the six combinations.
  • the first partition portions 111 and 121 and the second partition portions 112 and 122 in the first base material layer 110 and the second base material layer 120 extend in different directions, and thereby the quadrangular through-hole 140. Is formed on each of the base material layers 110 and 120, the moire cycle can be calculated by disassembling the partition portions 111, 121, 112, and 122 in each of the base material layers 110 and 120.
  • the moire is less likely to occur as the value of the moire period W increases with respect to the size of the filter medium, in reality, there is a slight distortion of the structure of the base material layer and a slight shift of the crossing angle between the base material layers. Since it exists, moire may occur locally on the surface of the filter medium. For this reason, in the present invention, the moiré phenomenon is not prevented from occurring due to the lamination of the first base material layer 110 and the second base material layer 120, but the moiré phenomenon is allowed to occur. In the above, it is difficult to macroscopically perceive the moire phenomenon by reducing the moire cycle W.
  • the first base material layer 110 and the second base material layer 120 are each independently in a direction perpendicular to the first partition portions 111 and 121 and the first partition portions 111 and 121 extending linearly in one direction.
  • the first base material layer 110 has the second partition parts 112 and 122 extending linearly.
  • the opening pitches of the formed through holes 140 and the through holes 140 formed in the second base material layer 120 are independently 100 ⁇ m or more.
  • the opening pitch is preferably 2000 ⁇ m or less, and more preferably 500 ⁇ m or less.
  • the opening pitch of the through holes 140 is preferably independently 100 ⁇ m or more and 2000 ⁇ m or less, and more preferably 100 ⁇ m or more and 500 ⁇ m or less.
  • the combination is the opening pitch omega b nearest opening pitch omega multiple of a omega an,
  • ratio of the opening pitch omega b is preferably the following relationship.
  • the value of ⁇ an / ⁇ b when ⁇ an > ⁇ b and the value of ⁇ b / ⁇ an when ⁇ an ⁇ b are preferably 1.05 or more, and 1.1 or more More preferably, it is more preferably 1.2 or more. Further, it is preferably 1.95 or less, more preferably 1.9 or less, and even more preferably 1.8 or less. For example, it is preferably 1.05 or more and 1.95 or less, more preferably 1.1 or more and 1.9 or less, and further preferably 1.2 or more and 1.8 or less.
  • the first base material layer 110 and the second base material layer 120 are each independently a straight line extending in a direction perpendicular to the first partition part 111, 121 extending linearly in one direction.
  • a quadrangular through-hole 140 is formed in each of the base material layers 110 and 120 by each of the partition parts.
  • the angle on the side of 90 degrees or less is preferably 5 degrees or more, more preferably 15 degrees.
  • both base material layers are laminated
  • the two base material layers are laminated so that the angle is preferably 5 ° to 90 °, more preferably 15 ° to 90 °, and still more preferably 30 ° to 90 °.
  • the width d of each partition part 111, 112, 121, 122 in each base material layer 110, 120 is different from each base material layer 110, 120.
  • it is preferably 10 ⁇ m or more and more preferably 30 ⁇ m or more.
  • it is preferable that it is 200 micrometers or less, and it is still more preferable that it is 100 micrometers or less.
  • the width d of each of the partition portions 111, 112, 121, and 122 in a plan view is independently 10 ⁇ m or more and 200 ⁇ m or less, and more preferably 30 ⁇ m or more and 100 ⁇ m or less.
  • the width d of each of the partition portions 111, 112, 121, and 122 does not theoretically affect the occurrence of the moire phenomenon.
  • the width of the first partition portion is d A
  • the opening and the base layer A is a length D A
  • the width of the first partition portion is d B
  • the moire period W BC observed when the layers B are stacked is theoretically the same.
  • the opening ratios of the respective base material layers 110 and 120 are preferably independently 50% or more and 55% or more. More preferably. Further, it is preferably 95% or less, and more preferably 90% or less.
  • the opening ratio of each of the base material layers 110 and 120 is preferably independently 50% or more and 95% or less, and more preferably 55% or more and 90% or less.
  • the filter medium 100 since the filter layer 130 disposed between the two base material layers 110 and 120 is composed of nanofibers, the light transmittance as a whole of the filter medium 100 is unlikely to be impaired. ing. Therefore, the filter medium 100 is suitable as a particulate filter medium having high transparency, that is, high light transmittance.
  • the degree of light transmittance of the filter medium 100 is preferably 55% or more, more preferably 75% or more, and even more preferably 80% or more, expressed in terms of total light transmittance.
  • the upper limit of the total light transmittance is not particularly limited, and the higher the value, the higher the transparency and the better. However, the higher the value of about 85%, the more useful as a light-transmitting particulate filter material.
  • the total light transmittance can be measured using, for example, NDH5000 which is a haze meter manufactured by Nippon Denshoku Industries Co., Ltd.
  • each of the base material layers 110 and 120 for example, a mesh sheet made of a polymer material, an opening sheet made of a polymer material, and a woven or knitted material made of a polymer material can be used.
  • the polymer compound that can be used is advantageously insoluble in the fluid to be filtered. Although it depends on the type of fluid, generally, a polyolefin resin, a polyester resin, a polyamide fiber, an acrylic resin, a vinyl resin, and any blends and copolymers thereof can be used as the polymer compound.
  • the moire cycle W is calculated based on the above equation (1). It can be calculated. Therefore, for example, when the same two base material layers are completely overlapped, the value of the moire cycle W becomes ⁇ in calculation, and the moire phenomenon does not occur. However, in practice, a moiré phenomenon may occur even when the same two base material layers are completely overlapped due to fluctuations in conditions at the time of manufacturing the base material layers 110 and 120.
  • the first base material layer and the second base material layer are each independently a first linear material extending linearly in one direction, and a second linearly extending in a direction intersecting the first linear material.
  • a mesh body formed by weaving for example, a plain weave mesh body
  • the intersection of the first linear material and the second linear material is fixed. Therefore, the pitch of the through holes tends to fluctuate, and the moire phenomenon tends to occur unintentionally. Therefore, when such a mesh body is used as the base material layer, it is advantageous to fix the intersection of the first linear material and the second linear material in the mesh body. Accordingly, it is possible to effectively prevent the moiré phenomenon from occurring due to unintentionally changing the pitch of the through holes.
  • means for fixing the intersection for example, bonding with an adhesive, thermal fusion, ultrasonic bonding, pressure bonding with or without heat, and the like can be used.
  • the filter layer 130 and the base material layers 110 and 120 that sandwich the filter layer 130 from both sides thereof may be simply laminated, or these three members may be joined by a joining means. Good. When these three are joined, it is preferable to perform partial joining from the viewpoint of not impairing the filtration performance of the filter medium 100.
  • the bonding means for example, bonding with an adhesive, thermal fusion, ultrasonic bonding, pressure bonding with or without heat, and the like can be used. Or both can also be joined by the entanglement of the filtration layer 130 and the base material layers 110 and 120.
  • the filter medium 100 having the configuration as described above has filtration performance due to the filtration layer 130 including nanofibers, prevention of occurrence of moire phenomenon due to the combination of the pair of base material layers 110 and 120, and high light transmittance. And can be applied to various fields. For example, it can be used as a sanitary mask or screen door. 15 and 16 show an example in which the filter medium 100 is applied to a sanitary mask.
  • the sanitary mask 1 ⁇ / b> A includes a mask body 2 and ear hooks 3 provided on both the left and right sides of the mask body 2.
  • the mask body 2 has a horizontally long rectangular shape.
  • the central portion excluding both end portions in the lateral direction of the mask body 2 is a face covering portion 4 that covers the wearer's face as shown in FIG. 16, and the face covering portion 4 is filtered. It is composed of the material 100.
  • Side sheets 5 are attached to both end portions of the mask body 2 in the lateral direction so as to sandwich the filter medium 100 from both sides, and the ear hooking portions 3 are formed at both end portions reinforced by the side sheets 5.
  • the ear strap 6 is fixed. As shown in FIG.
  • the face covering portion 4 preferably covers at least the mouth and the periphery of the nostril of the wearer's face.
  • the side sheet 5 for example, a narrow strip-like vertically long sheet folded in two along its longitudinal center line is used.
  • the side sheet 5 and the ear strap 6 are attached by a known method such as fusion by heat sealing or ultrasonic sealing, adhesion using an adhesive, or sewing.
  • the sanitary mask 1A uses the filter medium 100 for the face covering portion 4, so that it is highly light transmissive and excellent in the visibility of the expression of the wearer, and also excellent in barrier properties against bacteria and pollen. Further, the sanitary mask 1A is easy to reduce in weight, and has an advantage that it is lighter than a conventional mask made of non-woven fabric and is not bothered to be worn. Furthermore, since the barrier property can be expressed with nanofibers having a basis weight of about 0.1 g / m 2 , it is advantageous in that it is difficult to breathe. From the viewpoint of making it difficult to feel that the sanitary mask 1A is worn, the total mass is preferably less than 2 g, more preferably 1.5 g or less, and 0.7 g or more. More specifically, it is preferably 0.7 g or more and less than 2.0 g, more preferably 0.7 g or more and 1.5 g or less. The barrier property becomes better as the fiber diameter is smaller and the basis weight is larger.
  • the sanitary mask 1A has a bacterial barrier property, and is preferably used as a mask mainly for prevention of infectious diseases such as colds and countermeasures for spreading of infectious diseases, and a mask used in the medical field including surgery. It is done.
  • Other masks mainly used to prevent the inhalation of pollen and house dust masks used in food fields such as food manufacturing, cooking, and lunch box manufacturing, masks used in clean rooms for semiconductor manufacturing, It is also suitably used as a mask used for dust prevention in the field.
  • the filter medium 100 of the above embodiment has a three-member configuration in which a filter layer 130 composed of nanofibers is interposed between a pair of base material layers 110 and 120.
  • One or two or more other layers may be laminated on the outer surface of at least one of the base material layers 110 and 120.
  • one or a plurality of bowl-shaped folds may be formed in the filter medium 100.
  • left and right panel portions made of the filter medium 100 may be formed, and these panel portions may be joined non-linearly at the center in the width direction of the face to form a three-dimensional face covering portion.
  • the ear hook portion may be formed from a sheet material in which an opening or a slit is formed.
  • the face covering portion is a sanitary mask composed of a laminated sheet in which a base material layer and a nanofiber layer are laminated,
  • the base material layer is laminated on one side or both sides of the nanofiber layer, and has regularly formed through holes
  • the parallel sheet has a parallel light transmittance (JIS K7105) of 10% or more
  • the nanofiber layer is a sanitary mask including nanofibers having a fiber diameter of 350 nm or less and having a basis weight of 0.50 g / m 2 or less.
  • ⁇ 2> The sanitary mask according to ⁇ 1>, wherein the laminated sheet has a parallel light transmittance (JIS K7105) of 15% or more, more preferably 16% or more.
  • the nanofiber layer is the sanitary mask according to ⁇ 1> or ⁇ 2>, wherein the degree of orientation of the nanofiber is 0.05 or more and 1.00 or less.
  • ⁇ 4> The sanitary mask according to any one of ⁇ 1> to ⁇ 3>, wherein the base material layer of the laminated sheet has a total parallel light transmittance (JIS K7105) of 30% or more.
  • the base material layer is composed of a synthetic resin mesh sheet, a synthetic resin aperture sheet, or a synthetic resin knitted fabric or woven fabric.
  • the material (sheet material) constituting the base material layer is two or more of one or more of a synthetic resin mesh sheet, a synthetic resin aperture sheet, and a synthetic resin knitted fabric or woven fabric.
  • the base material layer includes a base material layer on one side of the nanofiber layer or both base material layers on both sides of the nanofiber layer formed of a mesh sheet made of synthetic resin. The sanitary mask according to any one of the above.
  • the said mesh sheet is a sanitary mask as described in said ⁇ 9> in which a vertical line and a horizontal line cross
  • ⁇ 12> The sanitary mask according to any one of ⁇ 6> to ⁇ 11>, wherein the mesh sheet has a mesh wire diameter of 20 ⁇ m to 500 ⁇ m, preferably 30 ⁇ m to 200 ⁇ m.
  • the mesh sheet has an opening ratio (%) of 30% to 90%, preferably 50% to 80%.
  • the mesh sheet or the filament yarn constituting the mesh sheet is composed of one or more selected from polyolefin resins, polyester resins and polyamide resins.
  • ⁇ 16> The sanitary mask according to any one of the above items ⁇ 6> to ⁇ 14>, wherein the mesh sheet intersects a plurality of vertical lines and a plurality of horizontal lines without being fused at each intersection.
  • Each of the mesh sheets has vertical and horizontal lines made of filament yarns, and the filament yarns are made of multifilaments, monofilaments, or solid fibers, and any one of the above items ⁇ 6> to ⁇ 16> Sanitary mask as described.
  • the constituent material of the base material layer has an area per through hole of preferably 0.02 mm 2 or more, more preferably 0.04 mm 2 or more, and preferably 25 mm 2 or less, more preferably 20 mm. 2 or less, also preferably 0.02 mm 2 or more 25 mm 2 or less, more preferably 0.04 mm 2 or more 20 mm 2 or less, wherein ⁇ 1> to sanitary mask according to any one of ⁇ 18>.
  • Sanitary mask as described in 1.
  • the nanofiber constituting the nanofiber layer has a fiber diameter of 350 nm or less, preferably a fiber diameter of 250 nm or less, more preferably a fiber diameter of 220 nm or less, and preferably 10 nm or more, more preferably 50 nm or more.
  • the nanofiber layer is preferably composed only of nanofibers having a fiber diameter of 350 nm or less, more preferably composed only of nanofibers having a fiber diameter of 250 nm or less or 220 nm or less, ⁇ 1>
  • the basis weight of the nanofiber layer is 0.50 g / m 2 or less, preferably 0.40 g / m 2 or less, preferably 0.05 g / m 2 or more, more preferably 0.10 g / m 2.
  • the degree of orientation of the nanofiber is preferably 0.05 or more, more preferably 0.06 or more, and preferably 1.00 or less, more preferably 0.90 or less. More specifically, the sanitary mask according to any one of ⁇ 1> to ⁇ 24>, preferably 0.05 to 1.00, more preferably 0.06 to 0.90.
  • ⁇ 26> The sanitary mask according to any one of ⁇ 1> to ⁇ 25>, wherein the nanofiber is made from a polymer compound, and is preferably a natural polymer compound or a synthetic polymer compound.
  • the nanofiber is made of a water-insoluble polymer compound.
  • the base material layer and the nanofiber layer are integrated without interposing any layer between the base material layer and the nanofiber layer, ⁇ 1> to The sanitary mask according to any one of ⁇ 27>.
  • the total mass of the sanitary mask is less than 2 g, preferably 1.5 g or less, 0.7 g or more, more specifically 0.7 g or more and less than 2.0 g, preferably 0
  • the sanitary mask according to any one of 1.
  • the total basis weight of the base material layer and the nanofiber layer is preferably 8 g / m 2 or more, more preferably 15 g / m 2 or more, when the base material layer is laminated on only one side of the nanofiber layer.
  • the base material layer is laminated on both sides of the nanofiber layer, it is preferably 16 g / m 2 or more, more preferably 30 g / m 2 or more, and preferably 60 g / m 2 or less, more preferably 50 g / m 2 or less, more specifically, preferably 16 g / m 2 or more and 60 g / m 2 or less, more preferably 30 g / m 2 or more and 50 g / m 2 or less. Any one The sanitary mask listed.
  • the ear strap is composed of a light-transmitting member, and an elastomer such as polyurethane or polyolefin is used as the light-transmitting member, and the total light transmittance of the ear strap is preferably 60.
  • a light-transmitting particulate filter material comprising a laminated sheet comprising a filtration layer of The laminated sheet has a total light transmittance of 55% or more, Light transmissive fine particles having a moire period W of 5000 ⁇ m or less caused by mutual interference between the through holes formed in the first base material layer and the through holes formed in the second base material layer Filter media.
  • the value of the moire cycle W is 3200 ⁇ m or less.
  • the value of the moire period W is particularly preferably 1400 ⁇ m or less, more preferably 800 ⁇ m or less.
  • the value of the moire cycle W is particularly preferably 1500 ⁇ m or less, more preferably 1000 ⁇ m or less, and further preferably 500 ⁇ m or less.
  • the light-transmitting fine particle filter material is more preferable.
  • the opening pitches ⁇ a and ⁇ b are defined by the sum of the width of the first partition portion or the second partition portion and the opening length of the through hole along the width direction. ⁇ is the crossing angle between the sections.
  • ⁇ 38> Any one of ⁇ 34> to ⁇ 37>, wherein the opening pitches of the through holes formed in the first base material layer and the through holes formed in the second base material layer are each independently 100 ⁇ m or more and 2000 ⁇ m or less. 2.
  • the opening pitch of the through holes is preferably 100 ⁇ m or more and 2000 ⁇ m or less independently,
  • each opening pitch to be combined is ⁇ an , ⁇ b, and ⁇ when ⁇ an > ⁇ b
  • the value of an / ⁇ b and the value of ⁇ b / ⁇ an when ⁇ an ⁇ b is preferably 1.05 or more, more preferably 1.1 or more, and 1.2 or more. More preferably, it is 1.95 or less, more preferably 1.9 or less, and still more preferably 1.8 or less. For example, it is preferably 1.05 or more and 1.95 or less, more preferably 1.1 or more and 1.9 or less, and still more preferably 1.2 or more and 1.8 or less. 39>.
  • the light-transmitting particulate filter material according to any one of 39>.
  • Each of the first base material layer and the second base material layer has a first partition portion extending linearly in one direction and a second partition portion extending linearly in a direction orthogonal to the first partition portion.
  • the quadrilateral through-holes are formed in each base material layer by both compartments, Both base material layers so that the angle formed by the extending direction of the first partition portion of the first base material layer and the extending direction of the first partition portion of the second base material layer is in the range of 5 degrees to 90 degrees.
  • Each of the first base material layer and the second base material layer has a first partition portion extending linearly in one direction and a second partition portion extending linearly in a direction orthogonal to the first partition portion.
  • the direction in which the first partition part of the first base material layer extends and the first partition part of the second base material layer is preferably 5 degrees or more, more preferably 15 degrees or more, and even more preferably 30 degrees or more, and the angle Any one of the above ⁇ 34> to ⁇ 40>, wherein the two base material layers are laminated so that is preferably 5 ° to 90 °, more preferably 15 ° to 90 °, and still more preferably 30 ° to 90 °.
  • Light transmitting particles filtration material according to the basis weight of the filtering layer is the ⁇ 34> to be 0.05 g / m 2 or more 0.5 g / m 2 or less in any one of ⁇ 42> of the nanofibers.
  • the basis weight of the nanofiber is preferably 0.05 g / m 2 or more, further preferably 0.1 g / m 2 or more, with respect to the upper limit, it is 0.5 g / m 2 or less preferably, further preferably 0.3 g / m 2 or less, a basis weight of nanofiber is preferably 0.05 g / m 2 or more 0.5 g / m 2 or less, 0.1 g / m 2 or more
  • the light-transmitting fine particle filtering material according to any one of ⁇ 34> to ⁇ 43>, more preferably 0.3 g / m 2 or less.
  • ⁇ 45> The light-transmitting particulate filter material according to any one of ⁇ 34> to ⁇ 44>, wherein the laminated sheet included in the light-transmitting particulate filter material has a total light transmittance of 75% or more.
  • ⁇ 46> The light-transmitting particulate filter material according to any one of ⁇ 34> to ⁇ 45>, wherein the laminated sheet included in the light-transmitting particulate filter material has a total light transmittance of 80% or more.
  • the first base material layer and the second base material layer are each independently a first linear material extending linearly in one direction, and a second line extending linearly in a direction intersecting the first linear material ⁇ 34> thru
  • the light-transmitting fine particle filter material according to any one of the above.
  • the width d of each partition portion in each substrate layer may be independently 10 ⁇ m or more when each substrate layer is viewed in plan. It is more preferably 30 ⁇ m or more.
  • Permeable particulate filter material is independently 10 ⁇ m or more and 200 ⁇ m or less, and more preferably 30 ⁇ m or more and 100 ⁇ m or less.
  • each base material layer is preferably independently 50% or more, more preferably 55% or more, preferably 95% or less, more preferably 90% or less, The opening ratio of each base material layer is preferably independently 50% or more and 95% or less, and more preferably 55% or more and 90% or less, according to any one of the above ⁇ 34> to ⁇ 48>.
  • Light transmissive particulate filter material is preferably independently 50% or more, more preferably 55% or more, preferably 95% or less, more preferably 90% or less.
  • each base material layer using a mesh sheet made of a polymer material, an opening sheet made of a polymer material, a woven fabric or a knitting made of a polymer material,
  • the polymer compound is insoluble in a fluid to be filtered, Any one of the above ⁇ 34> to ⁇ 49>, wherein a polyolefin resin, a polyester resin, a polyamide fiber, an acrylic resin, a vinyl resin, and an arbitrary blend or copolymer thereof are used as the polymer compound.
  • ⁇ 51> The sanitary mask according to any one of ⁇ 1> to ⁇ 33>, The sanitary mask according to any one of ⁇ 1> to ⁇ 33>, wherein the face covering portion is made of the light-transmitting fine particle filtering material according to any one of ⁇ 34> to ⁇ 50>.
  • ⁇ 52> A sanitary mask provided with the light-transmitting fine particle filtering material according to any one of ⁇ 34> to ⁇ 50>.
  • the total mass is preferably less than 2 g, more preferably 1.5 g or less, more preferably 0.7 g or more, and more specifically 0.7 g or more and less than 2.0 g.
  • the sanitary mask according to ⁇ 51> or ⁇ 52> more preferably 0.7 g or more and 1.5 g or less.
  • a mesh sheet made of polyester resin Tea Road (registered trademark) Sharp 4817, Yamanaka Sangyo Co., Ltd.
  • the mesh sheet had 100 meshes, an aperture ratio of 65%, and a wire diameter of 50 ⁇ m.
  • Table 1 shows the parallel light transmittance (JIS K7105), area per through hole (hole area), and Taber stiffness (JIS P8125-2000) of the mesh sheet.
  • a water-insoluble nanofiber layer was formed by spraying a water-insoluble nanofiber-forming liquid toward the surface of the base material layer using an electrospinning apparatus. The applied voltage was 35 kV, the distance between the electrodes was 280 mm, and the liquid discharge amount was 1 mL / h.
  • the nanofiber layer was formed by winding the base material layer around a drum-type collector having a diameter of 200 mm and adjusting the linear velocity of the drum to 200 m / min.
  • the fiber diameter, the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 1.
  • Example 1 the linear velocity of the base material layer when forming the nanofiber layer is changed to 100 m / min (Example 2), 63 m / min (Example 3), and 12 m / min (Example 4), respectively.
  • a laminated sheet having a configuration in which a base material layer was laminated on one side of a nanofiber layer was obtained in the same manner as Example 1 except for the above.
  • the fiber diameter, the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 1.
  • a quaternary salt surfactant Sanisol C
  • the applied voltage was 34 kV
  • the distance between the electrodes was 300 mm
  • the liquid discharge amount was 2 mL / h.
  • the nanofiber layer was formed by winding around a drum-type collector having a diameter of 200 mm and adjusting the linear velocity of the drum to 200 m / min.
  • the fiber diameter, the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 1.
  • Example 6 The base material layer used in Example 1 was further laminated on the nanofiber layer of the laminated sheet prepared in the same manner as in Example 1 to prepare a laminated sheet having a sandwich structure.
  • the base material layer in the laminated sheet obtained in Example 6 has a total parallel light transmittance (JIS K7105) measured by overlapping two mesh sheets on both sides of the nanofiber layer as shown in Table 1. It was.
  • the parallel light transmittance of each base material layer 11 is the same as the total parallel light transmittance of the base material layers of the laminated sheet.
  • Example 8 In Example 7, the base material layer was laminated on one side of the nanofiber layer in the same manner as in Example 7, except that the basis weight was adjusted to 0.21 g / m 2 by adjusting the spraying time to the base material. A laminated sheet having the structure described above was obtained. In the nanofiber layer of the obtained laminated sheet, the fiber diameter of the fiber (nanofiber), the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 2.
  • Example 9 In Example 1, the base material layer was laminated on one side of the nanofiber layer in the same manner as in Example 1 except that the basis weight was adjusted to 0.40 g / m 2 by adjusting the spraying time to the base material. A laminated sheet having the structure described above was obtained. In the nanofiber layer of the obtained laminated sheet, the fiber diameter of the fiber (nanofiber), the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 2.
  • Example 10 The base material layer used in Example 7 was further laminated on the nanofiber layer of the laminated sheet produced in the same manner as in Example 7 to produce a laminated sheet having a sandwich structure.
  • the following nonwoven fabric B formed in a frame shape was disposed only at the outer edge of the laminated sheet.
  • the base material layer in the laminated sheet obtained in Example 10 has the total parallel light transmittance (JIS K7105) measured by superimposing two mesh sheets on both sides of the nanofiber layer as shown in Table 2. there were.
  • Nonwoven fabric B Spunbond nonwoven fabric (Elves, basis weight 15 g / m 2 ) manufactured by Unitika Ltd. Since the non-woven fabric B did not form a regular hole area, the area per hole (hole area) could not be measured.
  • Example 11 The base material layer used in Example 8 was further laminated on the nanofiber layer of the laminated sheet prepared in the same manner as in Example 8 to prepare a laminated sheet having a sandwich structure.
  • the base material layer in the laminated sheet obtained in Example 11 has the total parallel light transmittance (JIS K7105) measured by overlapping two mesh sheets on both sides of the nanofiber layer as shown in Table 2. there were.
  • Example 12 In Example 7, on the nanofiber layer of the laminated sheet prepared in the same manner as in Example 7 except that the basis weight was adjusted to 0.40 g / m 2 by adjusting the spraying time to the base material, Example 7
  • the base material layers used in the above were further laminated to create a sandwich-type stacked sheet.
  • the base material layer in the laminated sheet obtained in Example 12 has the total parallel light transmittance (JIS K7105) measured by overlapping two mesh sheets on both sides of the nanofiber layer as shown in Table 2. there were.
  • Example 13 In Example 7, the following nonwoven fabric was formed on the nanofiber layer of the laminated sheet prepared in the same manner as in Example 7 except that the basis weight was adjusted to 0.11 g / m 2 by adjusting the spraying time to the base material. C was further laminated to produce a laminated sheet having a sandwich structure.
  • Nonwoven fabric C Spunbond nonwoven fabric manufactured by Unitika Ltd. (Elves, basis weight 15 g / m 2 ). Since the non-woven fabric B did not form a regular hole area, the area per hole (hole area) could not be measured.
  • Non-woven fabric A Non-woven fabric for masks (EW-605, basis weight 65 g / m 2 ) made of polyolefin / rayon resin manufactured by Nippon Vilene Co., Ltd. Table 1 shows the parallel light transmittance (JIS K7105) of the nonwoven fabric A.
  • the nonwoven fabric A did not form a regular hole area, the area per one through hole (hole area) could not be measured.
  • the fiber diameter, the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 1.
  • the spraying time was adjusted so that the basis weight would be 1.00 g / m 2 to obtain a sample.
  • surface of the nanofiber layer was obtained.
  • the fiber diameter, the basis weight, and the orientation degree of the fiber (nanofiber) were as shown in Table 1.
  • the laminated sheets obtained in the examples and comparative examples are fixed to the face of the adult woman so as to cover the entire area below the center of the nose, and in that state, the visibility of the expression of the adult woman is indoors. evaluated.
  • the visibility of the expression was judged visually by seeing whether the nose and mouth could be seen through the laminated sheet. Evaluation was made by visually observing 3 monitors from a distance of 2 m, and “A” when the nose and mouth could be clearly recognized, “B” when the nose and mouth could be recognized slightly, and nose and mouth Was evaluated as “C”.
  • the evaluation results are shown in Table 1. The result is a majority decision, and B is assigned when the evaluation of three persons is divided into three.
  • a mask sample was prepared so as to have an area of 250 cm 2 which is a general mask size, and the mass of the elastic band for earrings of 0.4 g was added to make a total mask. The mass was determined and shown in Tables 1 and 2.
  • the comparative example 3 with a large basic weight of a nanofiber layer was inferior also in the visibility of a wearer's facial expression with low light transmittance.
  • a filter medium having the configuration shown in FIG. 10 was produced by the following procedure.
  • (1) Base material layer Different kinds of mesh sheets made of polyester resin and having a square through hole were used as the first base material layer and the second base material layer. The intersection of the meshes in each mesh sheet was fixed by ultrasonic sealing.
  • the first base material layer had an opening pitch of 254 ⁇ m, an opening ratio of 61%, and a wire diameter of 55 ⁇ m.
  • the second base material layer had an opening pitch of 188 ⁇ m, an opening ratio of 58%, and a wire diameter of 48 ⁇ m.
  • a water-insoluble nanofiber-forming liquid was sprayed toward the surface of the first base material layer to form a filtration layer made of water-insoluble nanofibers.
  • the applied voltage was 35 kV
  • the distance between the electrodes was 280 mm
  • the liquid discharge amount was 1 mL / h.
  • the nanofibers were formed by winding the base material layer around a drum-type collector having a diameter of 200 mm and adjusting the linear velocity of the drum to 200 m / min.
  • the diameter of the nanofiber was 204 nm and the basis weight was 0.1 g / m 2 .
  • the 2nd base material layer was laminated
  • the second base material layer was laminated so that the crossing angle with the first base material layer was zero.
  • Example 2A to 4A A filter medium was obtained in the same manner as in Example 1A, except that the second base material layer having an opening pitch shown in Table 3 below was used.
  • Example 5A The same type of mesh sheet was used as the first base material layer and the second base material layer. The mesh intersections in this mesh sheet were fixed by ultrasonic sealing. This mesh sheet had an opening pitch of 254 ⁇ m, an opening ratio of 61%, and a wire diameter of 55 ⁇ m. Two mesh sheets were used, and both mesh sheets were laminated so that the crossing angle of both mesh sheets was as shown in Table 3. Except for this, a filter medium was obtained in the same manner as in Example 1A.
  • Example 6A to 9A Both mesh sheets were laminated so that the crossing angle of both mesh sheets was as shown in Table 3. Except for this, a filter medium was obtained in the same manner as in Example 5A.
  • the laminated sheets obtained in the examples were fixed to the face of an adult woman so as to cover the entire area below the center of the nose, and in that state, the visibility of the expression of the adult woman was evaluated indoors.
  • the visibility of the expression was judged visually by seeing whether the nose and mouth could be seen through the laminated sheet. Evaluation was made by visually observing 3 monitors from a distance of 2 m, and “A” when the nose and mouth could be clearly recognized, “B” when the nose and mouth could be recognized slightly, and nose and mouth Was evaluated as “C”.
  • the evaluation results are shown in Table 3. The result is a majority decision, and B is assigned when the evaluation of three persons is divided into three.
  • a mask sample is prepared so as to have an area of 250 cm 2 which is a general mask size, and a mass of 0.4 g of rubber band for ears is added as a mask.
  • the total mass was determined and shown in Table 3.
  • sensory evaluation of moire was performed by the following method. The results are shown in Table 3 below.
  • Moire sensory evaluation was performed about the filter material obtained in the Example. The sensory evaluation was performed by three evaluators. Generation
  • production of the moire phenomenon of the filter medium was evaluated on condition of the following. The filter medium was placed on a black mount, and the state of moire generated on the surface of the filter medium from a position 50 cm away was visually observed. It was quantified according to the following criteria according to the state of moire. Table 3 shows the total score of three people. 5: Moire is almost invisible (surface is uniform) 4: Moire is not visible 3: Moire is visible 2: Large moire is visible 1: Very large moire is visible
  • the sanitary mask of the present invention has high light transmittance and excellent visibility of the wearer's facial expression, as well as excellent barrier properties against bacteria and pollen.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Pulmonology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un masque hygiénique (1), une partie de revêtement de surface de face (4) de ce dernier étant composée d'une feuille stratifiée (10) dans laquelle une couche de base (11) et une couche de nanofibres (17) sont superposées. La couche de base est superposée sur une ou les deux surfaces de la couche de nanofibres (17), et présente des trous traversants formés de façon régulière. Le facteur de transmission lumineux parallèle (JIS K7105) de la feuille stratifiée (10) est de 10 % ou plus. La couche de nanofibres (17) comprend des nanofibres avec des diamètres de fibre de 350 nm ou moins, et a des poids de base de 0,50g/m2 ou moins.
PCT/JP2015/077316 2014-09-30 2015-09-28 Masque hygiénique WO2016052401A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020177008797A KR102365235B1 (ko) 2014-09-30 2015-09-28 위생 마스크
CN201580052501.7A CN107073303B (zh) 2014-09-30 2015-09-28 卫生口罩

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2014201873 2014-09-30
JP2014-201873 2014-09-30
JP2015-161820 2015-08-19
JP2015161820A JP6571448B2 (ja) 2015-08-19 2015-08-19 光透過性微粒子濾過材及びそれを備えた衛生マスク
JP2015176040A JP5961738B2 (ja) 2014-09-30 2015-09-07 衛生マスク
JP2015-176040 2015-09-07

Publications (1)

Publication Number Publication Date
WO2016052401A1 true WO2016052401A1 (fr) 2016-04-07

Family

ID=55630436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/077316 WO2016052401A1 (fr) 2014-09-30 2015-09-28 Masque hygiénique

Country Status (2)

Country Link
KR (1) KR102365235B1 (fr)
WO (1) WO2016052401A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113729326A (zh) * 2020-05-27 2021-12-03 梁泰安 简易舒适口罩
US20220007764A1 (en) * 2020-07-13 2022-01-13 Randolph Julian Loew Transparent medical facemask composite and facemasks formed thereby
CN115485051A (zh) * 2020-04-20 2022-12-16 米歇尔·塞库尔斯 作为/用于耐用耐洗高性能过滤介质的多层织物及其组装方法
EP4255994A4 (fr) * 2020-12-01 2024-10-02 Polyamyna Nanotech Inc Compositions antimicrobiennes de revêtement transparent, leurs procédés de préparation et leurs utilisations pour conférer une activité antimicrobienne à une surface

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102014731B1 (ko) * 2019-04-09 2019-08-27 주식회사 티엔솔루션 방진 마스크
KR102069880B1 (ko) * 2019-08-21 2020-02-11 주식회사 와이지팩토리 나노섬유 필터가 가공된 마스크
KR102626230B1 (ko) * 2019-09-18 2024-01-18 (주)엘엑스하우시스 창호용 필터의 무아레 현상 분석 방법 및 분석 장치
EP4112128A4 (fr) * 2020-02-28 2024-03-27 Medical-Aid Co., Ltd. Feuille de masque et masque
KR102437753B1 (ko) * 2020-06-03 2022-08-29 신석균 분진포집효율성을 향상시킨 다층 마스크 및 제조방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008111294A1 (fr) * 2007-03-15 2008-09-18 Kuraray Co., Ltd. Tissu stratifié
US20100239625A1 (en) * 2007-03-02 2010-09-23 Puckett Anne Mcintosh Transparent antimicrobial face mask
JP2012187929A (ja) * 2004-02-02 2012-10-04 Nanosys Inc 基板及びシリコンナノファイバーを含む物品
JP2013066643A (ja) * 2011-09-26 2013-04-18 Bio Design Kk 透視可能な衛生マスク

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5845943A (ja) 1981-09-14 1983-03-17 帝人株式会社 モアレを防止した積層体
JPS5851147A (ja) 1981-09-22 1983-03-25 帝人株式会社 モアレを防止した積層体
JPH10146396A (ja) 1996-11-21 1998-06-02 Suzu Pack:Kk マスク
JP2007021026A (ja) * 2005-07-20 2007-02-01 Daio Paper Corp マスク
IT1393709B1 (it) 2009-04-29 2012-05-08 Saati Spa Struttura composita tessutale, particolarmente per l'uso quale mezzo filtrante.
JP2010274102A (ja) 2009-04-30 2010-12-09 Taiyo Kagaku Co Ltd 花粉防止用マスク
JP2013053390A (ja) * 2011-09-06 2013-03-21 Mitsubishi Paper Mills Ltd 繊維基材と有機ナノファイバーの複合体形成方法および複合体
JP2014166299A (ja) * 2013-01-29 2014-09-11 Shinshu Univ マスク及びマスクの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012187929A (ja) * 2004-02-02 2012-10-04 Nanosys Inc 基板及びシリコンナノファイバーを含む物品
US20100239625A1 (en) * 2007-03-02 2010-09-23 Puckett Anne Mcintosh Transparent antimicrobial face mask
WO2008111294A1 (fr) * 2007-03-15 2008-09-18 Kuraray Co., Ltd. Tissu stratifié
JP2013066643A (ja) * 2011-09-26 2013-04-18 Bio Design Kk 透視可能な衛生マスク

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115485051A (zh) * 2020-04-20 2022-12-16 米歇尔·塞库尔斯 作为/用于耐用耐洗高性能过滤介质的多层织物及其组装方法
CN113729326A (zh) * 2020-05-27 2021-12-03 梁泰安 简易舒适口罩
US20220007764A1 (en) * 2020-07-13 2022-01-13 Randolph Julian Loew Transparent medical facemask composite and facemasks formed thereby
EP4255994A4 (fr) * 2020-12-01 2024-10-02 Polyamyna Nanotech Inc Compositions antimicrobiennes de revêtement transparent, leurs procédés de préparation et leurs utilisations pour conférer une activité antimicrobienne à une surface

Also Published As

Publication number Publication date
KR20170063660A (ko) 2017-06-08
KR102365235B1 (ko) 2022-02-18

Similar Documents

Publication Publication Date Title
WO2016052401A1 (fr) Masque hygiénique
TWI668032B (zh) 衛生口罩
JP5961738B2 (ja) 衛生マスク
JP7231318B2 (ja) プリーツマスク
JPWO2018221381A1 (ja) マスク
JP2009273726A (ja) マスク
JP6571448B2 (ja) 光透過性微粒子濾過材及びそれを備えた衛生マスク
Cheng et al. Commercial janus fabrics as reusable facemask materials: a balance of water repellency, filtration efficiency, breathability, and reusability
CN115485051B (zh) 作为/用于耐用耐洗高性能过滤介质的多层织物及其组装方法
KR102605007B1 (ko) 위생 마스크용 시트
KR102574568B1 (ko) 마스크용 시트, 그 제조 방법, 및 그것을 구비한 마스크
KR20210030059A (ko) 보건용 마스크
JP2020183586A (ja) マスク
RU210758U1 (ru) Масочный лист
US20240349826A1 (en) Disposable, Compostable Surgical/Medical Masks and Methods of Production Therefor
JP2023131504A (ja) 光透過性繊維フィルター並びにそれから形成されてなる衛生マスク及びパーテーション
WO2021192490A1 (fr) Masque
WO2022215321A1 (fr) Feuille multicouche, masque hygiénique et procédé de production d'une feuille multicouche
WO2023056562A1 (fr) Masques chirurgicaux/médicaux jetables et compostables et leurs procédés de production
JP2023095455A (ja) マスク
JP2021194623A (ja) ガスフィルター部品及びガスフィルター構造体
JP2022115630A (ja) 衛生マスク用シート
JP2024014463A (ja) マスク
JP2022011173A (ja) 衛生マスク
JP2022115632A (ja) 衛生マスク用シート

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15848090

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20177008797

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15848090

Country of ref document: EP

Kind code of ref document: A1