JP7456334B2 - Sheet for face shield, manufacturing method and method for using the sheet for face shield - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a face shield for protecting the face.

Traditionally, as a countermeasure against infectious diseases, masks have been used to cover the nose and mouth and are worn on the face, as well as face shields that cover and protect most of the face. Improvements to face shields are being made from time to time, and face shields with improvements such as simplified structure and weight reduction have also been proposed (see Patent Document 1).

Japanese Patent Application Publication No. 2005-287561

Conventional face shields perform their function by protecting the face from droplets, dust, etc. when worn. However, if the face shield is temporarily removed from the face by the user and the face shield is placed in contact with the mounting surface or exposed to the outside air, bacteria and viruses may easily adhere to the face shield. Become. In addition, conventional face shields have a three-dimensional shape in which the mounting portion extends in a direction intersecting the shield surface, so there is a problem that they are bulky and difficult to carry when removed from the face.

Therefore, the present invention aims to provide a face shield sheet for supplying a face shield that can be easily carried while being removed from the face, and a method for manufacturing and using such a face shield sheet. Take it as a challenge.

In order to solve the above problems, the present invention
A first side edge having a first side film and a second side film facing each other, an upper edge, a lower edge opposite to the upper edge, and a first side edge extending between the upper edge and the lower edge. A face shield sheet comprising a section and a second side edge,
a lower edge seal portion formed along the lower edge;
a first side edge seal portion formed along the first side edge;
a second side edge seal portion formed along the second side edge;
a fitting tool extending from the first side edge toward the second side edge in a direction along the upper edge near the upper edge;
a planned cutting line having a first part, a second part, and a third part;
The first portion is formed at a position between the lower edge seal portion and the fitting tool, closer to the fitting tool, and extends in the longitudinal direction of the fitting tool,
The second portion extends along the longitudinal direction of the fitting tool from a position overlapping the first side edge sealing portion to a position closer to the lower edge between the lower edge sealing portion and the fitting tool. It is formed to extend in the direction of
The third portion is located at a position closer to the second side edge between the first side edge seal and the second side edge seal in the longitudinal direction of the second side edge seal. To provide a face shield sheet formed to extend over a face.

In addition, the face shield sheet of the present invention is
The seal width of the first side edge seal portion may be 10 mm or less.

In addition, the face shield sheet of the present invention is
A distance between the upper edge and the first portion of the planned cutting line may be 25 mm or less.

In addition, the face shield sheet of the present invention is
A mask may be housed in a housing section sandwiched between the first side film and the second side film.

Moreover, the present invention
a step of stacking a continuous first side film and a second side film and conveying them in a predetermined conveyance direction;
A step of inserting a fitting tool between the first side film and the second side film at positions each having a predetermined distance from both ends in a direction intersecting the conveyance direction, and stacking the films;
The two fitting tools are joined to the first surface film and the second surface film, and at a position equidistant from the arrangement position of the two fitting tools, a lower edge is attached so as to extend along the conveyance direction. a step of forming a seal portion;
forming a side edge seal portion so as to extend along a direction intersecting the conveyance direction;
A first portion of a projected cutting line is located between the lower edge seal portion and the fitting tool and closer to the fitting tool; forming a second portion of the planned cutting line at a position near the lower edge and a third portion of the planned cutting line along the side edge seal portion in any order;
A method for manufacturing a face shield sheet, comprising: separating the side edge seal portion into a first side edge seal portion and a second side edge seal portion along a direction intersecting the conveyance direction. provide.

Moreover, the present invention
It has a first side film and a second side film facing each other, a lower edge seal part formed along the lower edge, and a first side edge seal part formed along the first side edge. , a second side edge seal portion formed along the second side edge, and a fitting tool extending from the first side edge toward the second side edge in a direction along the upper edge; A method of using a face shield sheet having a planned cutting line having a first part, a second part, and a third part,
After cutting along the planned cutting line to obtain a face shield with the second portion of the planned cutting line as the lower end,
With the fitting tool unfitted, the face shield is worn on the face so that the head is sandwiched between a first member and a second member that constitute the fitting tool,
When the face shield is removed from the face, the fitting tool is fitted and the first side film and the second side film are stacked and stored with their inner surfaces facing each other. provide instructions on how to use it.

According to the present invention, it is possible to provide a face shield sheet for supplying a face shield that can be easily carried while being removed from the face, and a method for manufacturing and using such a face shield sheet. can.

FIG. 1 is a plan view showing a face shield sheet according to an embodiment of the present invention. FIG. 1 is an exploded view showing members constituting a face shield sheet according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the face shield sheet shown in FIG. 1. FIG. It is a figure showing the manufacturing method of the sheet for face shields concerning one embodiment of the present invention. FIG. 2 is a perspective view showing a face shield obtained from the sheet for a face shield. It is a schematic diagram showing a state where a face shield concerning this embodiment is attached. It is a figure which shows the state where the face shield based on this embodiment was folded and the fitting tool was fitted. It is a figure showing an example of application of the sheet for face shields concerning this embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a face shield sheet according to an embodiment of the present invention. Moreover, FIG. 2 is an exploded view showing the members constituting the face shield sheet according to one embodiment of the present invention. FIG. 3 is a partial cross-sectional view of the face shield sheet shown in FIG. 1, taken along line AA. The mask of this embodiment has a rectangular shape in plan view. In this embodiment, the concept of a rectangle includes not only a rectangle with four right-angled corners, but also a rectangle whose four corners are chamfered to form an outwardly convex arc shape. Therefore, in the plan view shown in FIG. 1, the four corners of the mask may be curved.

＜＜Components＞＞
As shown in FIG. 2, the face shield sheet 10 of this embodiment includes a first surface film 1 having a substantially rectangular shape, a second surface film 2 having the same shape as the first surface film 1, and a belt-shaped sheet in a plan view. It is composed of three members: a fitting tool 20 (a male member 21 and a female member 22). The mask of this embodiment is formed by heat-sealing three members, the first surface film 1, the second surface film 2, and the fitting tool 20, at predetermined locations.

As shown in FIG. 2, a band-shaped fitting tool 20 in a plan view is sandwiched between a second surface film 2 having the same shape as the first surface film 1. Since the first surface film 1 and the second surface film 2 have the same shape, they are the same whether viewed from the first surface film 1 side or from the second surface film 2 side. Therefore, although the plan view of the face shield sheet viewed from the second surface film 2 side is omitted, it is the same as the plan view shown in FIG. As will be described later, the fitting tool 20 is composed of a male member 21 and a female member 22, but the male member 21 is visible from the first surface film 1 side shown in the plan view of FIG.

<<Each seal part>>
The face shield sheet 10 of this embodiment includes a lower edge seal portion 15, a first side edge seal portion 16, and a second side edge seal portion 17, as shown in FIG. In FIG. 1, each seal portion is indicated by diagonal hatching. The lower edge seal portion 15, the first side edge seal portion 16, and the second side edge seal portion 17 are formed by sealing and joining the first side film 1 and the second side film 2. On the upper edge portion 4 side, no seal portion is formed, and the first surface film 1 and the second surface film 2 are not joined. The inner space 11 of the face shield sheet 10 is defined by the inner edge of the lower edge seal part 15, the inner edge of the first side edge seal part 16, and the inner edge of the second side edge seal part 17. Therefore, the upper edge 4 side forms an opening 14 connected to the internal space 11.

The lower edge seal portion 15 is formed along the lower edge 5 to include the lower edge 5 (lower end in FIG. 1). The first side edge seal portion 16 is formed to include the first side edge portion 6 (the left end in FIG. 1) along the first side edge portion 6, and is formed to include the first side edge portion 6 (the left end in FIG. 1). 17 is formed along the second side edge 7 to include the second side edge 7 (the right end in FIG. 1). The seal widths of the lower edge seal portion 15, the first side edge seal portion 16, and the second side edge seal portion 17 can be set arbitrarily, but are preferably 5 mm or more and 15 mm or less. As will be described later, the first side edge seal portion 16 is located substantially in front of the face when worn as the face shield 10A. Therefore, it is preferable that the seal width be as short as possible so as not to get in the way. Specifically, the seal width W1 of the first side edge seal portion 16 is preferably 10 mm or less, more preferably 7 mm or less. Note that the seal width is the width in a direction perpendicular to the direction in which the seal portion extends. The lower edge seal portion 15, the first side edge seal portion 16, and the second side edge seal portion 17 are all formed to the end of each edge. This makes it possible to efficiently manufacture a face shield, as will be described later.

＜＜Cutting line＞＞
In the face shield sheet 10 of this embodiment, as shown by the broken line in FIG. 1, a planned cutting line S having a first portion Sa, a second portion Sb, and a third portion Sc is formed. The first portion Sa is formed at a position closer to the fitting tool 20 between the lower edge seal portion 15 and the fitting tool 20 so as to extend in the longitudinal direction of the fitting tool 20 (horizontal direction in FIG. 1). has been done. The second portion Sb extends along the longitudinal direction of the fitting tool 20 from a position overlapping the first side edge sealing portion 16 to a position near the lower edge 5 between the lower edge sealing portion 15 and the fitting tool 20. It is formed to extend in the direction (left-right direction in FIG. 1). It is preferable that the second portion Sb reaches the first side edge 6. The third portion Sc is located between the first side edge seal portion 16 and the second side edge seal portion 17 at a position closer to the second side edge portion 7 in the longitudinal direction of the second side edge seal portion 17. It is formed to extend to. The first portion Sa, second portion Sb, and third portion Sc of the scheduled cutting line S are formed to extend in the direction along the upper edge 4, lower edge 5, and second side edge 7, respectively. It is preferable. In this embodiment, the first portion Sa is parallel to the upper edge 4, the second portion Sb is parallel to the lower edge 5, and the third portion Sc is parallel to the second side edge 7. In this embodiment, the three portions of the planned cutting line are all realized by perforations, but they may be realized by easy cutting processes other than perforations. Further, all three parts of the planned cutting line may be processed using different processes, or two or more planned cutting lines may be realized by the same type of processing. The perforations can be formed using a perforation barrel with a blade attached to the surface of the cylinder, a straight blade, or by laser processing. In this embodiment, three portions of the planned cutting line are formed by forming perforations by laser processing.

The “position closer to the fitting tool 20” where the first portion Sa is formed means a position closer to the lower end 20b of the fitting tool 20 than the inner edge of the lower edge seal portion 15. The “position closer to the lower edge 5” where the second portion is formed means a position closer to the lower edge 5 than the lower end 20b of the fitting tool 20. The “position closer to the second side edge 7” where the third portion Sc is formed means a position closer to the second side edge 7 than the first side edge 6.

Specifically, as shown in FIG. 1, the first portion Sa is formed at a distance Lf from the upper edge 4, and the second portion Sb is formed at a distance Lb from the lower edge 5. The third portion Sc is formed at a distance Lc from the second side edge 7. Regarding distance Lf, distance Lb, and distance Lc, each adjacent edge seal portion (the entire lower edge seal portion 15, below the first portion Sa of the second side edge seal portion 17) can be removed. There are no particular restrictions as long as it is a location. However, considering that each seal width is 5 mm to 15 mm, it is preferable that distance Lf, distance Lb, and distance Lc are all 15 mm or more and 30 mm or less. If it is less than 15 mm, there is a risk that it will overlap with each edge seal portion, and if it exceeds 30 mm, the number of removed portions will increase unnecessarily, resulting in a waste of resources. However, the distance Lf also varies depending on the width Le of the fitting, and the distance Lb and the distance Lc also vary depending on the seal width of each edge seal portion. In particular, it is preferable that the distance Lf, which is the distance between the upper edge 4 and the first portion Sa of the scheduled cutting line, is 25 mm or less. If the distance Lf exceeds 25 mm, the height Lf of the portion to be fixed to the head will become too large, and there is a possibility that it will be difficult to fix to the head. The first portion Sa, the second portion Sb, and the third portion Sc are spaced 5 mm or more from the lower end 20b of the fitting tool 20, the inner edge of the lower edge seal portion 15, and the inner edge of the second side edge seal portion 17, respectively. Preferably. By being 5 mm or more away from the inner edge of the fitting tool 20 and each edge seal, even if an error occurs during manufacturing, there is a possibility that each planned cutting line will overlap the fitting tool 20 and each edge seal. This is because it becomes lower.

<<Film details>>
As the first surface film 1 and the second surface film 2, laminated films can be used. The laminated film is a laminate that includes at least a base layer and a sealant layer from the outside. For example, a laminated film is formed by laminating a base material layer and a sealant layer in order from the outside. The sealant layer is a layer that constitutes the innermost surface (attachment surface) of the face shield. For example, as the material for the base layer, a polyester film such as polyethylene terephthalate or polybutylene terephthalate, a polyamide film such as nylon, a polypropylene film, etc. can be used. The thickness is approximately 10 μm to 50 μm. The base material layer is preferably biaxially stretched.

Further, the laminated film may include a plurality of base material layers. A first base material layer and a second base material layer can be provided as the plurality of base material layers. As the first base layer and the second base layer, an appropriate combination of the above materials can be used. For example, polyethylene terephthalate can be used as the first base layer that is the outermost layer, and polyamide can be used as the second base layer that is the inner layer (on the sealant layer side). The first base layer and the second base layer can be laminated using, for example, a dry lamination method.

The sealant layer is disposed on the innermost side of the laminated film when used as a face shield. As the material for the sealant layer, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, etc. can be used. In order to have stiffness as the first film 1 and the second film 2 for protecting the face, the thickness of the sealant layer is preferably 60 μm or more and 100 μm or less, more preferably 70 μm or more and 90 μm or less. preferable. If the thickness of the sealant layer is too thin, the elasticity will be weak and it will be easy to bend due to slight force such as wind. This is because if the thickness of the sealant layer is too thick, resources will be consumed in proportion to the effectiveness. The sealant layer is preferably unstretched. Further, in order to prevent curling, it is preferable to use unstretched polypropylene (CPP), which is harder than soft linear low-density polyethylene (LLDPE), as the sealant layer.

Further, when the face shield 10A is worn, the wearer needs to be able to visually recognize the outside through the first film 1 and the second film 2. Therefore, the first surface film 1 and the second surface film 2 need to have transparency at least in the portion corresponding to the eye when worn. Of course, the entire range may be transparent. The transparency of the first surface film 1 and the second surface film 2 is sufficient as long as they have visible light transparency that allows the wearer to see the outside.

It is preferable that the first surface film 1 and the second surface film 2 have high transparency in order to ensure the wearer's visibility. Therefore, among the materials listed above, polyethylene terephthalate (PET) is more preferable than oriented polypropylene (OPP). Moreover, since visibility decreases when the thickness of the laminated film increases, it is preferable that the number of base material layers is only one layer. Furthermore, the haze (cloudiness) of the laminated film is preferably 20% or less, more preferably 10% or less, as measured in accordance with JIS K7136.

The laminated films used as the first side film 1 and the second side film 2 are basically transparent, so basically no printed layer is provided, but the laminated films used as the first side film 1 and the second side film 2 are basically not provided with a printed layer. A printing layer may be provided for printing necessary information on the copies. The printing layer is formed from a printing ink containing a binder and a pigment.

The laminated film may include other layers. The other layers may be provided on the outside of the base layer, or between the base layer and the sealant layer. The other layers are appropriately selected depending on the required functions, such as water vapor and other gas barrier properties. For example, when the other layer is a gas barrier layer, a vapor deposition layer of a metal such as aluminum, a metal oxide such as aluminum oxide, or an inorganic oxide such as silicon oxide is provided. The vapor deposition layer may be laminated on the base layer or may be vapor-deposited on the sealant layer. Alternatively, a metal foil such as aluminum may be provided within a range that does not obstruct the wearer's field of vision. In addition, a resin layer having gas barrier properties, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), or aromatic polyamide such as nylon MXD6, may be provided. Each layer can be laminated using a dry lamination method, a melt extrusion method, or the like.

The laminated film realizing the first surface film 1 and the second surface film 2 can have various configurations as long as it includes a base layer and a sealant layer from the outside, as described above. For example, a polyethylene terephthalate (PET) film having a thickness of 12 μm can be used as the base layer, and a non-oriented polypropylene (CPP) film having a thickness of 80 μm can be used as the sealant layer. A printed layer can be formed on the inner surface of the base layer at a position that is considered not to obstruct the wearer's field of vision. In this case, the base layer and the sealant layer are bonded together by dry lamination (DL) via an adhesive layer to obtain a laminated film having a structure of PET 12 μm/printed layer (ink)/adhesive layer (DL)/CPP 80 μm from the outer surface side. The adhesive layer can be a cured product of an acrylic polyol and an isocyanate compound.

<<Fitting tool>>
Next, the fitting tool 20 will be explained. As shown in FIGS. 1 to 3, in the face shield sheet 10 of the present embodiment, a fitting tool 20 for fitting each other is formed along the upper edge 4 at a position near the upper edge 4. has been done. In this embodiment, the fitting tool 20 has a band-like shape in plan view. As shown in FIG. 1, the fitting tool 20 is provided near the upper edge 4 in the direction along the upper edge 4, extending from the first side edge 6 to the second side edge 7. In this embodiment, the longitudinal direction of the band-shaped fitting tool 20 is provided so as to be parallel to the upper edge 4 in plan view.

FIG. 3 is a cross-sectional view taken along line AA shown in FIG. As shown in FIGS. 1 and 3, the face shield sheet 10 according to the present embodiment has a fitting tool near the upper edge 4 that can be opened and closed and includes a first member and a second member that fit into each other. 20. This fitting tool 20 also functions as a shape-retaining member for fixing the face shield to the head. In this embodiment, the male member 21 will be described as the first member and the female member 22 as the second member, but the female member 22 may be the first member and the male member 21 may be the second member.

As shown in FIG. 3, the male member 21 includes a first base 21a and a male fitting part 21b on one side of the first base 21a, and a first surface film 1 on the other side of the first base 21a. is bonded to the inner surface of The female member 22 includes a band-shaped second base 22a and a female fitting part 22b on one side of the second base 22a, and the other side of the second base 22a is joined to the inner surface of the second surface film 2. ing. In addition, in FIG. 1, in the part where the fitting tool 20 overlaps the first side edge seal part 16 and the second side edge seal part 17, the male member 21 which is the first member and the female member which is the second member 22 is integrally welded to the first side edge seal portion 16 and the second side edge seal portion 17. As shown in FIG. 1, the fitting tool 20 has an upper end 20a, which is an end closer to the upper edge 4, located at a distance La from the upper edge 4 to a position closer to the lower edge 5. That is, the distance La is the distance from the upper edge 4 to the upper end 20a of the fitting tool 20. The distance La is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 8 mm or less. For example, La may be 5 mm.

The fitting tool 20 formed along the upper edge 4 can be used as a so-called zipper (zipper), and can be used later when a face shield 10A (see FIG. 5) is created from the face shield sheet 10. , the surfaces of the face shield 10A that come into contact with the face can be expanded or closed. Note that the joining surfaces of the fitting tool 20 are not limited to those shown in FIG. may have been done.

In the fitting tool 20, the fitting parts of the male fitting part 21b and the female fitting part 22b and the base parts of the first base part 21a and the second base part 22a are made of different materials. In this embodiment, of the fitting tool 20 that also functions as a shape-retaining member, it is the male fitting portion 21b and the female fitting portion 22b that mainly have the shape-retaining effect. Various materials can be used as the material for the fitting part that has a shape-retaining effect as long as it can exhibit a shape-retaining effect to the extent that it can be fixed to the head. For example, it is preferable to use a resin composition in which 0.1 to 40 parts by weight of an inorganic filler is added to 100 parts by weight of a high-density polyethylene resin. As the inorganic filler, it is preferable to use one or more selected from the group consisting of talc, a nucleating agent, mica, calcium carbonate, magnesium carbonate, and magnesium oxide. Since the fitting parts of the male fitting part 21b and the female fitting part 22b contain the above-mentioned materials, the fitting part can be formed only by an extrusion molding process without intervening a stretching process. becomes.

Further, as the material for the fitting portion bases of the first base portion 21a and the second base portion 22a, it is possible to use a resin that is compatible with the sealant layer of the laminated film used as the first surface film 1 and the second surface film 2. can. Specifically, it is preferable to use an olefin resin such as polyethylene (PE) or polypropylene (PP) that is compatible with the sealant layer of the laminated film. As the olefin resin, polyethylene resins such as low density polyethylene or linear low density polyethylene, and polypropylene resins are preferable. As the polypropylene resin, homopolypropylene, block polypropylene, random polypropylene (RPP), propylene-ethylene-butene 1 random terpolymer, etc. can be used. The materials of the fitting portions of the male fitting portion 21b and the female fitting portion 22b and the fitting portion bases of the first base 21a and the second base 22a may be different as described above, or may be the same. There may be. In either case, the material of the fitting portion base may be a resin that is compatible with the sealant layer of the laminated film. For example, when the sealant layer of the laminated film used as the first surface film 1 and the second surface film 2 is unstretched polypropylene (CPP), it is preferable to use a material compatible with CPP. Specifically, "MFB-905" manufactured by Idemitsu Unitech, "MX-13F" manufactured by Takiron C.I., etc. can be used.

As shown in FIG. 3, the fitting tool 20 consists of a male member 21 and a female member 22. The male member 21 is joined to the first film 1, and the female member 22 is joined to the second film 2 by heat sealing. At this time, a heat shield plate (not shown) is interposed between the male member 21 and the female member 22 to prevent the male member 21 and the female member 22 from being thermally fused together.

As shown in FIG. 1, the distance Ld is between the lower end 20b of the fitting 20 and the first portion Sa of the planned cutting line. That is, the distance Ld is the distance from the first portion Sa of the planned cutting line to the lower end 20b of the fitting 20. The distance Ld is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 8 mm or less. For example, Ld = 5 mm. If the distance Ld is too small, there is a risk that the fitting 20 will overlap the first portion Sa of the planned cutting line due to manufacturing errors. If the distance Ld is too large, there is a risk that the height Lf of the part fixed to the head will be too large, making it difficult to fix to the head.

In order to avoid complicating the drawing, in FIG. 3, the fitting tool 20 has the entire first base 21a joined to the first film 1 and the entire second base 22a joined to the second film 2. It is shown in a closed state. However, in reality, it is usually not joined in a predetermined range between the upper end 20a, which is the end on the upper edge 4 side of the fitting tool 20, and the lower end 20b, which is the end on the lower edge 5 side. It is. This is to prevent the male fitting part 21b and the female fitting part 22b from being welded together. Since this is not a feature of this embodiment, a detailed explanation will be omitted.

Le shown in FIG. 1 is the width of the fitting tool 20 that is strip-shaped in plan view. That is, Le is the width of the fitting tool 20 in the direction connecting the upper edge 4 and the lower edge 5, and is the distance between the upper end 20a and the lower end 20b of the fitting tool 20. The width Le of the fitting tool 20 is not particularly limited, but is preferably 2 mm or more and 20 mm or less, and more preferably 5 mm or more and 18 mm or less. For example, Le=13 mm. If the width Le is too small, wearing it for a long time may cause pain to the head. Furthermore, if the width Le is too large, the height Lf of the portion to be fixed to the head becomes too large, which may make it difficult to fix to the head.

There is no particular limitation on the size of the face shield sheet 10 as long as it can be properly attached to the face. However, in the face shield 10A obtained from the face shield sheet 10 according to the present embodiment, the head is sandwiched between the first member and the second member (male member 21 and female member 22) of the fitting tool 20. In order to keep it in place, it needs to be sized to fit your head. For reference, the average head circumference is 57.5 cm for men (18 to 34 years old), 57.1 cm for men (60 to 84 years old), 55.1 cm for women (18 to 34 years old), and 55.1 cm for women (60 to 60 years old). ~84 years old) is 54.6 cm. When the distance between the inner edge of the first side edge seal part 16 and the inner edge of the second side edge seal part 17 is smaller than 1/2 (half) of the head circumference, the fitting tool 20 is opened to the maximum ( With the entire area of the fitting tool 20 unfitted), the fitting tool 20 is hooked onto the head and worn. On the other hand, when the distance between the inner edge of the first side edge seal part 16 and the inner edge of the second side edge seal part 17 is greater than 1/2 (half) of the head circumference, the head is It becomes possible to pass between the first member and the second member. In this case, the remaining first and second members can be fitted and fixed in accordance with the size of the head.

Therefore, considering 1/2 of the average head circumference, the distance between the inner edge of the first side edge seal part 16 and the inner edge of the second side edge seal part 17 is 250 mm (25.0 cm) to 350 mm (35.0 cm). ) is preferable. The height of the face shield sheet 10, which is the distance between the upper edge 4 and the lower edge 5 (the distance between the upper edge 4 and the lower edge 5, the length in the vertical direction in FIG. 1), is 150 mm (15. 0 cm) to 300 mm (30.0 cm). Within this range, several sizes can be set, such as for adults and children, S, M, and L.

<<Manufacturing method>>
Next, a method for manufacturing the face shield sheet 10 according to the present embodiment will be described. FIG. 4 is a top view of a part of the apparatus for manufacturing the face shield sheet 10 according to the present embodiment. First, two continuous laminated films, which are the first side film 1 and the second side film 2, are prepared. Then, two continuous laminated films of the same width are conveyed with their ends aligned and stacked one on top of the other. Later, these ends will each become the upper edge portion 4 of the face shield sheet. In FIG. 4, two continuously stacked first-side films 1 and second-side films 2 are conveyed from top to bottom. Then, at a predetermined position, the fitting tool 20 is inserted between the two sheets of the first surface film 1 and the second surface film 2 which are overlapped from both ends (left and right ends in FIG. 4). The fitting tool 20 is transported with its upper end 20a placed at a distance La from both ends.

As shown in FIG. 4, on the downstream side (lower side in FIG. 4) of the insertion position of the fitting tool 20, there are three thermally processed parts 31a, 31b, and 32 whose longitudinal direction is the flow direction from upstream to downstream. is set up. Of these, the thermal processing parts 31a and 31b perform thermal processing on the first surface film 1 and the second surface film 2 at positions sandwiching the fitting tool 20, so that the first surface film 1, the fitting tool 20, The second surface film 2 is bonded. Specifically, the male member 21 is joined to the first surface film 1, and the female member 22 is joined to the second surface film 2. In the heat processing parts 31a and 31b, a heat shield plate (not shown) is placed between the male member 21 and the female member 22 of the fitting tool 20 to prevent the male member 21 and the female member 22 from being thermally fused. It is composed of

Then, the thermal processing section 32 performs thermal processing on the first surface film 1 and the second surface film 2 to join the inner surface of the first surface film 1 and the inner surface of the second surface film 2. The portion heat-sealed by the thermally processed portion 32 will later become the lower edge sealed portion 15. Therefore, the thermal processing section 32 forms the lower edge seal section 15 at a position equidistant from the arrangement positions of the two fitting tools 20 so as to extend along the conveyance direction.

Further downstream of the thermal processing sections 31a, 31b, and 32 (lower side in FIG. 4), a thermal processing section 33 whose longitudinal direction is a direction intersecting the conveyance direction is installed. The thermal processing section 33 performs thermal processing on the first surface film 1 and the second surface film 2 to join the inner surface of the first surface film 1 and the inner surface of the second surface film 2. As a result, a side edge seal portion that becomes the basis of the first side edge seal portion 16 and the second side edge seal portion 17 is formed. The side edge seal portion, which is the portion heat-sealed by the thermal processing portion 33, will later become the first side edge seal portion 16 and the second side edge seal portion 17.

Further downstream from the thermal processing section 33 (lower side in FIG. 4), perforation sections 36a to 36d for performing sewing are installed along the conveyance direction. The perforations 36a to 36d form perforations extending in the transport direction on the continuous sheet in which the first side film 1 and the second side film 2 are stacked. These perforations become the first portion Sa of the planned cutting line and the second portion Sb of the planned cutting line shown in FIG. In the example of FIG. 4, the perforated parts 36a and 36d form the first portion Sa of the intended cutting line, and the perforated parts 36b and 36c form the second part Sb of the intended cutting line.

Further, on the downstream side (lower side in FIG. 4) of the perforation parts 36a to 36d, a perforation part 37 is installed which performs perforation along a direction intersecting the conveyance direction. The perforation section 37 forms perforations extending in a direction intersecting the conveyance direction on the continuous sheet in which the first side film 1 and the second side film 2 are stacked. This perforation becomes the third portion Sc of the projected cutting line shown in FIG. This perforation is formed along the direction in which the side edge seal portion extends. In the example shown in FIG. 4, the perforated parts 36a to 36d that form perforations extending in the transport direction are installed upstream of the perforated part 37 that forms perforations that extend in a direction intersecting the transport direction. Although shown, the perforation section 37 may be located upstream of the perforation sections 36a to 36d. Therefore, the first portion Sa, second portion Sb, and third portion Sc of the planned cutting line can be formed in any order.

A slit processing section 34 for performing slit processing is installed downstream of the sewing machine processing sections 36a to 36d and the sewing machine processing section 37 (lower side in FIG. 4). The slitting section 34 slits the continuous sheet in which the first side film 1 and the second side film 2 are stacked along the conveyance direction. The slit processing positions are equidistant from both ends of the continuous sheet (which will later become the upper edge 4). Thereby, the continuous sheet in which the first side film 1 and the second side film 2 are stacked is separated into two along the conveyance direction. The slit-processed position is the lower edge 5. The slit processing section 34 separates the portion heat-sealed by the thermal processing section 32 to form the lower edge seal section 15 of each adjacent individual, so that the lower edge seal section 15 of each individual , including the lower edge 5.

Although not shown, further downstream, the portion heat-sealed in the thermal processing section 33 is separated by a cutter extending in a direction intersecting the conveyance direction. The separated ends become the first side edge 6 and second side edge 7 of each face shield sheet 10. This separates each individual. They are separated at the side edge seal portion formed by the heat-processed portion 33, and the first side edge seal portion 16 of one individual and the second side edge seal portion 17 of the adjacent individual are separated. In the individual, the first side edge seal portion 16 and the second side edge seal portion 17 are formed to include the first side edge portion 6 and the second side edge portion 7, respectively. As a result, a face shield sheet 10 as shown in FIG. 1 is obtained.

By manufacturing a face shield sheet using the manufacturing method described above, the face shield sheet can be efficiently manufactured using the production resources and production procedures that constitute a resin pouch. Therefore, even if a sudden outbreak of an infectious disease occurs and the demand for face shields increases rapidly, it will be possible to quickly manufacture and supply face shields.

<<How to use the face shield sheet>>
Next, a method of using the face shield sheet and face shield according to the present embodiment will be explained. The face shield sheet 10 as shown in FIG. 1 is sold and delivered to users. The user cuts from the first portion Sa or the third portion Sc side along the planned cutting line S having the first portion Sa, the second portion Sb, and the third portion Sc. Then, a face shield 10A is obtained in which most of the first side edge 6 is joined and the lower edge 5 and the second side edge 7 are open. FIG. 5 is a perspective view showing a face shield 10A obtained from the face shield sheet 10.

As described above, the face shield 10A is obtained by cutting out predetermined portions along the first planned cutting line portion Sa, the second planned cutting line portion Sb, and the third planned cutting line portion Sc. Therefore, as shown in FIG. 5, the lower end of the face shield 10A is the second planned cutting line portion Sb, and the open end on the original second side edge portion 7 side is the third planned cutting line portion Sc.

In order to attach the face shield 10A according to this embodiment to the face, the fitting tool 20 is unfitted to form a space between the male member 21 and the female member 22. In order to fit the head, the male member 21 and the female member 22 form a space whose cross section is approximately circular. Then, the wearer's head is passed through this space, the male member 21 and the female member 22 are placed against the sides of the head, and the remaining male member 21 and female member 22 are fitted together. This allows the space created between the male member 21 and the female member 22 to be sized to suit the wearer's head. FIG. 6 is a schematic diagram showing a state in which the face shield 10A is worn on the face. FIG. 6(a) is a front perspective view from above, and FIG. 6(b) is a side view. By fitting the remaining male member 21 and female member 22 together and narrowing the space created between the male member 21 and the female member 22, the face shield 10A can be fitted to the wearer's head.

After wearing a face shield, if you are moving to areas where you do not need to wear it, you may carry it with you. In this case, with conventional face shields, the attached part extends in a direction that intersects the shield surface and has a three-dimensional shape, making it bulky and difficult to carry when removed from the face. Become. In the face shield of this embodiment, the fitting tool 20 is fitted with the inner surfaces of the first film 1 and the second film 2 facing each other. FIG. 7 is a diagram showing a state in which the face shield 10A is folded and the fitting tool 20 is fitted. As shown in FIG. 7, by folding and fitting the fitting tool 20, the inner surfaces of the first surface film 1 and the second surface film 2, which are the mounting surfaces, are not exposed to the outside. Therefore, the face shield 10A can be carried or stored while maintaining the cleanliness of the mounting surface (inner surface).

<<Application example>>
Next, an application example of the face shield sheet according to this embodiment will be described. As described above, the face shield sheet 10 according to the present embodiment includes the fitting tool 20 for fitting the first member and the second member together and removing the fitting between them. Therefore, the face shield sheet 10 can be used in combination with a bag in which the opening 14 can be opened and closed. That is, the internal space 11 can be used as a housing section. FIG. 8 is a diagram showing a modification of the face shield according to the present embodiment. Similar to FIG. 1, FIG. 8 is a plan view viewed from the first surface film 1 side. As shown in FIG. 8, in the applied example, a mask 50 is housed in an internal space 11 that is a housing section sandwiched between a first side film 1 and a second side film 2. The mask 50 is for covering the nose and mouth, and has a mask main body 51 made of a material such as nonwoven fabric, and a mounting string 52 for mounting the mask 50 on the face. As such a mask 50, various known masks can be used. As shown in FIG. 8, by providing the mask 50 in the internal space 11, which is the housing part, in the applied example face shield sheet 10', the face shield and the mask can be sold or purchased as a set. , the wearer can wear both a face shield and a mask.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. The technical scope of the present invention covers various aspects without departing from the spirit of the present invention.

1... First side film 2... Second side film 4... Upper edge 5... Lower edge 6... First side edge 7... Second side edge 10, 10'...Face shield sheet 10A...Face shield 11...Inner space 14...Opening 15...Lower edge seal portion 16...First side edge seal portion 17... -Second side edge seal portion 20...Fitting tool 20a...Upper end 20b...Lower end 50...Mask La...Distance from upper edge 4 to upper end 20a of fitting tool 20 Lb ...Distance from the lower edge 5 to the second planned cutting line Sb Lc...Distance from the second side edge 7 to the third planned cutting line Sc Ld...First (of the planned cutting line) Distance from part Sa to the lower end 20b of the fitting tool 20 Le... Width of the fitting tool 20 in the direction connecting the upper edge 4 and the lower edge 5 Lf... The distance between the upper edge 4 and the planned cutting line Distance (height) of 1 part Sa
Sa...First part (of the planned cutting line) Sb...Second part (of the planned cutting line), lower end of face shield 10A Sc...Third part (of the planned cutting line), face shield 10A The first side end portion, the second side end portion W1... Seal width of the first side edge seal portion 16

Claims (6)

A first side edge having a first side film and a second side film facing each other, an upper edge, a lower edge opposite to the upper edge, and a first side edge extending between the upper edge and the lower edge. A face shield sheet comprising a section and a second side edge,
a lower edge seal portion formed along the lower edge;
a first side edge seal portion formed along the first side edge;
a second side edge seal portion formed along the second side edge;
a fitting tool extending from the first side edge toward the second side edge in a direction along the upper edge near the upper edge;
a planned cutting line having a first portion, a second portion, and a third portion;
The first portion is formed at a position between the lower edge seal portion and the fitting tool, closer to the fitting tool, and extends in the longitudinal direction of the fitting tool,
The second portion extends along the longitudinal direction of the fitting tool from a position overlapping the first side edge sealing portion to a position closer to the lower edge between the lower edge sealing portion and the fitting tool. It is formed to extend in the direction of
The third portion is located at a position closer to the second side edge between the first side edge seal and the second side edge seal in the longitudinal direction of the second side edge seal. A face shield sheet that is formed to extend. The face shield sheet according to claim 1, wherein the first side edge seal portion has a seal width of 10 mm or less. The face shield sheet according to claim 1 or 2, wherein a distance between the upper edge and the first portion of the planned cutting line is 25 mm or less. The face shield sheet according to any one of claims 1 to 3, wherein a mask is housed in a housing section sandwiched between the first side film and the second side film. a step of stacking a continuous first side film and a second side film and conveying them in a predetermined conveyance direction;
A step of inserting a fitting tool between the first side film and the second side film at positions each having a predetermined distance from both ends in a direction intersecting the conveyance direction, and stacking the films;
The two fitting tools are joined to the first surface film and the second surface film, and at a position equidistant from the arrangement position of the two fitting tools, a lower edge is attached so as to extend along the conveyance direction. a step of forming a seal portion;
forming a side edge seal portion so as to extend along a direction intersecting the conveyance direction;
A first portion of a projected cutting line is located between the lower edge seal portion and the fitting tool and closer to the fitting tool; forming a second portion of the planned cutting line at a position near the lower edge and a third portion of the planned cutting line along the side edge seal portion in any order;
A method for manufacturing a face shield sheet, comprising the step of separating the side edge seal portion into a first side edge seal portion and a second side edge seal portion along a direction intersecting the conveyance direction. It has a first side film and a second side film facing each other, a lower edge seal part formed along the lower edge, and a first side edge seal part formed along the first side edge. , a second side edge seal portion formed along the second side edge, and a fitting tool extending from the first side edge toward the second side edge in a direction along the upper edge; A method of using a face shield sheet having a planned cutting line having a first part, a second part, and a third part,
After cutting along the planned cutting line to obtain a face shield with the second portion of the planned cutting line as the lower end,
With the fitting tool unfitted, the face shield is worn on the face so that the head is sandwiched between a first member and a second member that constitute the fitting tool,
When the face shield is removed from the face, the fitting tool is fitted and the first side film and the second side film are stacked and stored with their inner surfaces facing each other. How to use.