WO2014042171A1

WO2014042171A1 - Disposable mask able to collect and adsorb radioactive organic iodine

Info

Publication number: WO2014042171A1
Application number: PCT/JP2013/074481
Authority: WO
Inventors: 憲夫野川; 敏村山; 道教茂木; 隆行移川
Original assignee: 株式会社日本環境調査研究所
Priority date: 2012-09-13
Filing date: 2013-09-11
Publication date: 2014-03-20
Also published as: TW201420150A; CN104640607A; JP2014073358A

Abstract

[Problem] To provide a disposable mask that can collect and adsorb radioactive organic iodine that is in the air, and prevent entry of the radioactive organic iodine into the wearer's body. [Solution] A disposable mask (10A) has a filter member (11) that covers the wearer's mouth and nose, and ear loop members (12) for securing the filter member (11) to the wearer's face. The filter member (11) is formed from the following: an iodine collecting sheet made from a plurality of activated carbon fibers; a first foreign matter removing sheet that overlaps the skin-facing surface of the iodine collecting sheet and that has a prescribed surface area; and a second foreign matter removing sheet that overlaps the non skin-facing surface of the iodine collecting sheet and that has a prescribed surface area. The activated carbon fibers are impregnated with an adsorbent for adsorbing radioactive organic iodine.

Description

Disposable mask capable of collecting and adsorbing radioactive organic iodine

The present invention relates to a disposable mask having a filter member that covers a wearer's mouth and nose and a mounting member that fixes the filter member to the wearer's face.

A mask body part made of a sheet material that covers the mouth and nose and has air permeability, an attachment part that is connected to the mask body part and attached to the face, and is formed on the mask body part and impregnated with a liquid agent A mask provided with a high-porosity sheet made of synthetic fiber on both sides of the surface of the filter pocket where the mask filter abuts is disclosed. (See Patent Document 1). As the liquid, water, water mixed with a medicinal ingredient that moisturizes the throat, or water mixed with a medicinal ingredient that improves the passage of the nasal cavity are used.

Japanese Patent Laid-Open No. 2004-73227

The mask disclosed in Patent Document 1 can adsorb foreign matter such as dust and pollen in the air, and can hold a sufficient amount of liquid that can exhale moist air for a long time. The wearer does not inhale foreign matter such as dust and pollen, and can also inhale damp air through the liquid impregnated in the mask filter, preventing dry mouth and throat be able to. However, if this mask contains radioactive organic iodine in the air, it will not collect radioactive organic iodine during its wear and will not adsorb radioactive organic iodine. May be swallowed by the wearer's body.

The object of the present invention is to capture and adsorb the radioactive organic iodine even if the organic organic iodine is contained in the air, the radioactive organic iodine in the air will not pass through the wearer's An object of the present invention is to provide a disposable mask that can prevent radioactive organic iodine from entering the body.

The premise of the present invention for solving the above problems is a disposable mask having a filter member covering the mouth and nose of the wearer and a mounting member for fixing the filter member to the wearer's face.

The feature of the present invention in the above premise is that the filter member is formed from at least one iodine collection sheet having a predetermined area for collecting radioactive organic iodine contained in air made of a plurality of activated carbon fibers, and collecting iodine. The sheet is any one of a fiber nonwoven fabric having air permeability, a woven fabric, and a knitted fabric, and an adsorbent that adsorbs radioactive organic iodine is attached to the activated carbon fibers forming the iodine collection sheet.

As an example of the present invention, the filter member includes a first foreign matter removal sheet having a predetermined area that is positioned on the skin side of the wearer and overlaps the skin facing surface of the iodine collection sheet, and the first foreign matter removal sheet includes a plurality of first foreign matter removal sheets. It is a fiber nonwoven fabric having breathability made from thermoplastic synthetic resin fibers, and an iodine collecting sheet is fixed to the non-skin facing surface of the first foreign matter removing sheet.

As another example of the present invention, the filter member includes a second foreign matter removal sheet having a predetermined area that is positioned on the non-skin side of the wearer and overlaps the skin non-facing surface of the iodine collecting sheet, and the second foreign matter removal The sheet is an air permeable nonwoven fabric made from a plurality of thermoplastic synthetic resin fibers, and an iodine collection sheet is interposed between the first foreign substance removing sheet and the second foreign substance removing sheet, and these foreign substances are removed. The sheet is fixed to the skin facing surface and the skin non-facing surface.

As another example of the present invention, the filter member is located on the skin side of the wearer and overlaps the skin-facing surface of the iodine collection sheet, and has a predetermined area on the non-skin side of the wearer. A non-woven fabric nonwoven fabric having a breathability made of a plurality of thermoplastic synthetic resin fibers, wherein the foreign matter removal sheet is positioned and overlaps with the non-opposite surface of the iodine collecting sheet and having a predetermined area. And an iodine collection sheet is detachably accommodated in a pocket formed between the first foreign matter removal sheet and the second foreign matter removal sheet.

As another example of the present invention, the filter member includes a foreign matter removal bag that covers the entire area of the skin facing surface and the non-skin facing surface of the iodine collection sheet, and the foreign matter removal bag is made of a plurality of thermoplastic synthetic resin fibers. It is a sheet-like fiber nonwoven fabric having air permeability, and an iodine collection sheet is movably accommodated inside the foreign matter removal bag.

As another example of the present invention, the iodine collection sheet is folded in a zigzag manner so as to repeat ups and downs in one of the horizontal direction and the vertical direction, and is arranged in one of the horizontal direction and the vertical direction. And a plurality of troughs.

As another example of the present invention, the iodine collecting sheet is a plurality of zigzags that are regularly folded in a zigzag manner so as to repeat ups and downs in either the horizontal direction or the vertical direction, and are arranged in either the horizontal direction or the vertical direction. Are formed from at least two iodine collection sheets having a peak portion and a plurality of valley portions.

As another example of the present invention, the average fiber diameter of the activated carbon fiber forming the iodine collection sheet is in the range of 5 to 20 μm, and the basis weight of one iodine collection sheet is in the range of 50 to 200 g / m ² . The thickness dimension of one iodine collection sheet is in the range of 0.5 to 3 mm.

As another example of the present invention, at least one of the first foreign matter removal sheet and the second foreign matter removal sheet contains a plurality of water absorbent fibers, and the ratio of the water absorbent fibers to the total weight of the foreign matter removal sheet is 10 to It is in the range of 20% by weight.

As another example of the present invention, at least one of the first foreign matter removing sheet and the second foreign matter removing sheet is made of a plurality of water-absorbing fibers, and at least the skin facing surface and the non-skin facing surface of the foreign matter removing sheet are used. A water-absorbing fiber nonwoven fabric that overlaps one side is included.

As another example of the present invention, at least one of the first foreign matter removal sheet and the second foreign matter removal sheet contains a plurality of antibacterial fibers, and the ratio of the antibacterial fibers to the total weight of the foreign matter removal sheet is 5 to It is in the range of 10% by weight.

As another example of the present invention, at least one of the thermoplastic synthetic resin fiber that forms the first foreign matter removing sheet and the thermoplastic synthetic resin fiber that forms the second foreign matter removing sheet is electretized.

As another example of the present invention, the average fiber diameter of the thermoplastic synthetic resin fiber making the first foreign matter removal sheet is in the range of 3 to 50 μm, and the average fiber diameter of the thermoplastic synthetic resin fiber making the second foreign matter removal sheet is It is in the range of 0.5 to 30 μm, the basis weight of one of the first foreign matter removing sheet is in the range of 1.5 to 50 g / m ² , and the basis weight of one of the second foreign matter removing sheet is 10 to 100 g / m It is in the ^second range, the first one thickness in the range of 0.2 ~ 3 mm of the foreign matter removing sheet, a sheet of a thickness dimension of the second foreign matter removing sheet is in the range of 0.5 ~ 3 mm.

As another example of the present invention, the adsorbent is at least one of potassium iodide and potassium iodate, and the amount of potassium iodide and potassium iodate added per unit weight (kg) of activated carbon fiber. Is in the range of 10 to 25% by weight / kg, and the radioactive organic iodine removal efficiency of the iodine collection sheet at an air humidity of 95% is in the range of 85 to 90%.

As another example of the present invention, the adsorbent is an amine, the amount of amine attached to the unit weight (kg) of the activated carbon fiber is in the range of 10 to 20% by weight / kg, and the humidity of the air is 95%. The iodine organic sheet has a radioactive organic iodine collection efficiency of 95% or more.

As another example of the present invention, the amine is triethylenediamine C6H12N2.

According to the disposable mask capable of collecting and adsorbing the radioactive organic iodine according to the present invention, the activated carbon fibers forming the iodine collecting sheet collect the radioactive organic iodine, and the adsorbent adhering to the activated carbon fibers. Adsorbs radioactive organic iodine, so even if radioactive organic iodine is contained in the air, the radioactive organic iodine is reliably collected and adsorbed on the mask, and the radioactive organic iodine does not pass through, so wear the mask. The entry of radioactive organic iodine into the wearer's body can be prevented. A disposable mask is a disposable mask that collects and adsorbs radioactive organic iodine at a predetermined concentration, and then is discarded immediately. The radioactive organic iodine collected by the activated carbon fiber and adsorbed by the adsorbent is activated carbon fiber or It is not released again from the adsorbent, and it can prevent the diffusion of radioactive organic iodine from the mask to other places, and the half-life is safe when radioactive organic iodine is collected and adsorbed on the discarded mask. Can greet you.

The filter member includes a first foreign matter removing sheet having a predetermined area that is positioned on the skin side of the wearer and overlaps the skin-facing surface of the iodine collecting sheet, and the first foreign matter removing sheet is made of a plurality of thermoplastic synthetic resin fibers. The disposable non-woven mask, which is an air-permeable fiber nonwoven fabric and has an iodine collection sheet fixed to the non-skin facing surface of the first foreign matter removal sheet, has dust, pollen, germs, viruses, etc. by the first foreign matter removal sheet. The foreign matter is collected, and the foreign matter can be prevented from entering the wearer's body wearing the mask. The disposable mask not only prevents foreign substances such as dust, pollen, germs, and viruses from entering the body through the foreign substance removal sheet, but also the activated carbon fibers that make up the iodine collection sheet contain radioactive organic iodine. Since the adsorbents collected and adsorbed on the activated carbon fibers adsorb radioactive organic iodine, even if radioactive organic iodine is contained in the air, the radioactive organic iodine is reliably collected and adsorbed on the mask. The radioactive organic iodine does not pass through, and it is possible to prevent the radioactive organic iodine from entering the body of the wearer wearing the mask.

The filter member includes a second foreign matter removing sheet having a predetermined area that is positioned on the non-skin side of the wearer and overlaps the skin non-facing surface of the iodine collecting sheet, and the second foreign matter removing sheet includes a plurality of thermoplastic synthetic resin fibers. Is a fiber nonwoven fabric having air permeability made from the above, and an iodine collection sheet is interposed between the first foreign matter removing sheet and the second foreign matter removing sheet, and the skin facing surface and the skin non-facing surface of these foreign matter removing sheets The disposable mask fixed to the surface collects foreign matter such as dust, pollen, germs, and viruses by the first and second foreign matter removing sheets, and prevents the dust and pollen from adhering to the iodine collecting sheet. In addition to being able to do so, it is possible to prevent these foreign objects from entering the body of the wearer wearing the mask. The disposable mask can not only prevent foreign substances such as dust, pollen, germs, and viruses from entering the body via the first and second foreign substance removal sheets, but also a plurality of activated carbons that form an iodine collection sheet. The fiber collects radioactive organic iodine, and the adsorbent adsorbed on these activated carbon fibers absorbs the radioactive organic iodine, so even if the organic organic iodine is contained in the air, the radioactive organic iodine is surely in the mask. The organic organic iodine is collected and adsorbed to the inside, and the radioactive organic iodine does not pass therethrough, so that it is possible to prevent the radioactive organic iodine from entering the body of the wearer wearing the mask.

The filter member is located on the skin side of the wearer and overlaps the skin facing surface of the iodine collection sheet, and the first foreign matter removal sheet having a predetermined area and the non-skin side of the iodine collection sheet is located on the non-skin side of the wearer. A second foreign matter removing sheet having a predetermined area overlapping the surface, wherein the foreign matter removing sheet is a breathable fiber nonwoven fabric made from a plurality of thermoplastic synthetic resin fibers, and the iodine collecting sheet is the first foreign matter. The disposable mask accommodated in the pocket formed between the removal sheet and the second foreign matter removal sheet so as to be insertable / removable is provided with dust, pollen, germs and viruses by the first and second foreign matter removal sheets forming the pocket. In addition to preventing foreign matter such as dust and pollen from adhering to the iodine collecting sheet, entry of these foreign matter into the body of the wearer wearing the mask can be prevented. The disposable mask can not only prevent foreign substances such as dust, pollen, germs, and viruses from entering the body via the first and second foreign substance removal sheets, but also a plurality of activated carbons that form an iodine collection sheet. The fiber collects radioactive organic iodine, and the adsorbent adsorbed on these activated carbon fibers absorbs the radioactive organic iodine, so even if the organic organic iodine is contained in the air, the radioactive organic iodine is surely in the mask. The organic organic iodine is collected and adsorbed to the inside, and the radioactive organic iodine does not pass therethrough, so that it is possible to prevent the radioactive organic iodine from entering the body of the wearer wearing the mask. The disposable mask has an iodine collection sheet that can be inserted into and removed from the pocket, and the iodine collection sheet that has collected and adsorbed the radioactive organic iodine at a predetermined concentration is taken out of the pocket, and a new iodine collection sheet is stored in the pocket. Therefore, the mask can be used a plurality of times by exchanging the iodine collection sheet, and the use period of the mask can be extended.

The filter member includes a foreign matter removal bag that covers the entire area of the skin-facing surface and the non-skin-facing surface of the iodine collection sheet, and the foreign material removal bag has a breathable sheet shape made of a plurality of thermoplastic synthetic resin fibers. The disposable mask with the iodine collection sheet movably accommodated inside the foreign matter removal bag is made of foreign material such as dust, pollen, germs, and viruses by the foreign matter removal bag that contains the iodine collection sheet. In addition to preventing dust and pollen from adhering to the iodine collection sheet, they can prevent foreign substances from entering the wearer's body wearing the mask. The disposable mask not only prevents foreign substances such as dust, pollen, germs, and viruses from entering the body through the foreign substance removal bag, but also the activated carbon fibers that make up the iodine collection sheet contain radioactive organic iodine. Since the adsorbents collected and adsorbed on the activated carbon fibers adsorb radioactive organic iodine, even if radioactive organic iodine is contained in the air, the radioactive organic iodine is reliably collected and adsorbed on the mask. The radioactive organic iodine does not pass through, and it is possible to prevent the radioactive organic iodine from entering the body of the wearer wearing the mask.

The iodine collection sheet is folded in a zigzag manner so as to repeat ups and downs in either the horizontal direction or the vertical direction, and a plurality of peaks and valleys lined up in either the horizontal direction or the vertical direction. The disposable mask has a iodine collection sheet that can be folded in a zigzag in the horizontal direction or the vertical direction, and compared with an iodine collection sheet that is not folded, the volume of the iodine collection sheet can be increased. Increases the weight and surface area of the sheet, improves the collection and adsorption performance of the collection sheet for radioactive organic iodine, and ensures that the mask captures radioactive organic iodine even if it is contained in the air. It can be collected and adsorbed, and it is possible to reliably prevent radioactive organic iodine from entering the body of the wearer wearing the mask.

The iodine collection sheet is folded in a zigzag manner so that the undulation is repeated in either the horizontal direction or the vertical direction, and a plurality of peaks and valleys lined up in either the horizontal direction or the vertical direction. A disposable mask formed from at least two iodine collection sheets having, for example, an iodine collection sheet that is folded from a zigzag in a lateral direction and a zigzag that is folded in a vertical direction so that it is not folded. Compared with the iodine collection sheet, it can increase the volume of the iodine collection sheet, increase the basis weight and surface area of the collection sheet, and improve the collection performance and adsorption performance of the collection sheet for radioactive organic iodine. Even if radioactive organic iodine is contained in the air, the radioactive organic iodine can be reliably collected and adsorbed on the mask. It is possible to reliably prevent the ingress of radioactive organic iodine to's body.

The average fiber diameter of the activated carbon fiber making the iodine collecting sheet is in the range of 5 to 20 μm, the basis weight of one iodine collecting sheet is in the range of 50 to 200 g / m ² , and the thickness of one iodine collecting sheet is Disposable masks with dimensions in the range of 0.3 to 3 mm have high iodine collection sheet weight per unit area, so the collection sheet has high collection and adsorption performance for radioactive organic iodine. Iodine can be reliably collected on activated carbon fiber, and radioactive organic iodine can be reliably adsorbed on the adsorbent, so that the radioactive organic iodine does not pass through the mask and the wearer wearing the mask The entry of radioactive organic iodine into the body can be reliably prevented. Since the disposable mask has a thickness dimension of the iodine collection sheet in the above range, the mask does not become bulky and can prevent a decrease in the wearing feeling of the mask, which may cause discomfort to the wearer wearing the mask. Absent.

A disposable mask in which at least one of the first foreign matter removal sheet and the second foreign matter removal sheet contains a plurality of water absorbent fibers, and the ratio of the water absorbent fibers to the total weight of the foreign matter removal sheet is in the range of 10 to 30% by weight. The moisture contained in the air passing through these foreign matter removal sheets and the moisture contained in the exhalation of the wearer are adsorbed by the water-absorbing fibers, and can maintain the dry state of the activated carbon fibers that make the collection sheet, The adsorbent adhering to the activated carbon fiber does not fall off from the activated carbon fiber due to moisture in the air or moisture contained in the breath of the wearer, and the surface of the activated carbon fiber is not wetted by the moisture. While the fall of the collection function of the activated carbon fiber with respect to iodine can be prevented, the fall of the adsorption function of the adsorbent with respect to radioactive organic iodine can be prevented.

At least one of the first foreign matter removing sheet and the second foreign matter removing sheet includes a water absorbent fiber nonwoven fabric made of a plurality of water absorbent fibers and overlapping at least one of the skin facing surface and the non-skin facing surface of the foreign matter removing sheet. The disposable mask must maintain the dry state of the activated carbon fibers that make up the collection sheet by adsorbing moisture contained in the air that passes through the foreign material removal sheet and moisture contained in the breath of the wearer to the absorbent fiber nonwoven fabric. Because the adsorbent adhering to the activated carbon fiber does not fall off the activated carbon fiber due to moisture in the air or moisture contained in the breath of the wearer, the surface of the activated carbon fiber is not wetted by moisture. In addition to preventing a decrease in the collection function of activated carbon fibers for radioactive organic iodine, it also prevents a decrease in the adsorption function of the adsorbent for radioactive organic iodine Door can be.

Disposable in which at least one of the first foreign substance removing sheet and the second foreign substance removing sheet contains a plurality of antibacterial fibers, and the ratio of the antibacterial fibers to the total weight of the foreign substance removing sheet is in the range of 5 to 10% by weight. Since the germs and viruses contained in the air passing through the foreign substance removal sheet are sterilized or sterilized by the antibacterial fibers, the mask can prevent the germs and viruses from entering the wearer's body. In addition, since germs and viruses contained in the wearer's breath are sterilized or sterilized by the antibacterial fibers, it is possible to prevent the germs and viruses from being released to the outside of the mask.

The disposable mask in which at least one of the thermoplastic synthetic resin fiber that forms the first foreign matter removal sheet and the thermoplastic synthetic resin fiber that makes the second foreign matter removal sheet is electretized is the first foreign matter removal sheet or Since foreign matter such as dust and pollen that has entered the foreign matter removal sheet by the electrostatic action of the second foreign matter removal sheet is efficiently collected in the foreign matter removal sheet, the dust and pollen are reliably attached to the iodine collection sheet. Not only can this be prevented, but also the entry of foreign matter such as dust and pollen into the wearer's body can be reliably prevented.

The average fiber diameter of the thermoplastic synthetic resin fiber making the first foreign matter removal sheet is in the range of 3-50 μm, and the average fiber diameter of the thermoplastic synthetic resin fiber making the second foreign matter removal sheet is in the range of 0.5-30 μm. The basis weight of one sheet of the first foreign matter removal sheet is in the range of 1.5 to 50 g / m ² , and the basis weight of one piece of the second foreign matter removal sheet is in the range of 10 to 100 g / m ² , Disposable masks with one foreign substance removal sheet having a thickness of 0.2 to 3 mm and one second foreign substance removal sheet having a thickness of 0.5 to 3 mm have a basis weight of the foreign substance removal sheet. Is within the above range, and the thickness dimension of the foreign substance removal sheet is within the above range, the mask does not become bulky, can prevent a decrease in the wearing feeling of the mask, and gives discomfort to the wearer wearing the mask. There is nothing. In addition, the collection efficiency of foreign matters in the mask is improved, and air permeability is not hindered, and various functions required for a normal mask can be realized.

The adsorbent is at least one of potassium iodide and potassium iodate, and the amount of adsorbent adhering to the unit weight (kg) of activated carbon fiber is in the range of 10 to 25% by weight / kg, and the humidity of the air Disposable masks with 95% iodine collection sheet radioactive organic iodine removal efficiency in the range of 85-90% are active by using potassium iodide and potassium iodate, which have an excellent adsorption function for radioactive organic iodine. Since potassium iodide and potassium iodate adhering to each carbon fiber adsorb radioactive organic iodine in the air, even if radioactive organic iodine is contained in the air, the radioactive organic iodine is reliably collected in the mask. And the adsorbed radioactive organic iodine does not pass through, and the radioactive organic iodine enters the body of the wearer wearing the mask. It is possible to prevent. Disposable masks have an addition amount of potassium iodide and potassium iodate in the above range, and the radioactive organic iodine removal efficiency of the iodine collection sheet is in the above range, so the concentration of a trace amount of radioactive organic iodine present in the air Even if the amount of radioactive organic iodine present in the air is very small, the radioactive organic iodine can be reliably collected and adsorbed on the mask. Disposable masks do not release radioactive organic iodine collected by activated carbon fibers and adsorbed on potassium iodide or potassium iodate again from potassium iodide or potassium iodate, but from the radioactive organic iodine mask. And the half-life can be safely reached with radioactive organic iodine collected and adsorbed on a discarded mask.

The adsorbent is an amine, the amount of the amine attached to the unit weight (kg) of the activated carbon fiber is in the range of 10 to 20% by weight / kg, and the radioactive organic iodine of the iodine collection sheet at an air humidity of 95% The disposable mask with a collection efficiency of 95% or more has amines adsorbing radioactive organic iodine attached to the activated carbon fiber, and the filter has a radioactive organic iodine removal efficiency of 95% or more at an air humidity of 95%. Therefore, it exhibits excellent adsorption performance of radioactive organic iodine under the high humidity environment of air. Even if radioactive organic iodine is contained in the air, the radioactive organic iodine can be reliably collected and adsorbed. Organic iodine does not pass through, and radioactive organic iodine can be prevented from entering the body of the wearer wearing the mask. In the disposable mask, the amount of amines attached is in the above range, and the radioactive organic iodine removal efficiency of the iodine collection sheet is in the above range. Therefore, the concentration of a small amount of radioactive organic iodine present in the air is low, and in the air Even if a small amount of radioactive organic iodine is present, the radioactive organic iodine can be reliably collected and adsorbed on the mask. In the disposable mask, the radioactive organic iodine collected by the activated carbon fiber and adsorbed by the amines is not released again from the amines, and the diffusion of the radioactive organic iodine from the mask to other places can be prevented, The half-life can be safely reached with radioactive organic iodine collected and adsorbed on the discarded mask.

Disposable masks whose adsorbent is triethylenediamine C6H12N2 for amines use triethylenediamine C6H12N2 having an excellent adsorption function for radioactive organic iodine, so that triethylenediamine C6H12N2 attached to each activated carbon fiber is radioactive in the air. Because organic iodine is adsorbed, even if radioactive organic iodine is contained in the air, radioactive organic iodine is reliably collected and adsorbed by the mask, so that the radioactive organic iodine does not pass through it. It is possible to prevent radioactive organic iodine from entering the human body. In the disposable mask, the amount of triethylenediamine C6H12N2 attached is in the range of 10 to 20% by weight / kg, and the radioactive organic iodine removal efficiency of the iodine collection sheet is 95% or more. Even if the concentration of iodine is low and the amount of radioactive organic iodine present in the air is very small, the radioactive organic iodine can be reliably collected and adsorbed on the mask. The disposable mask prevents radioactive organic iodine collected by activated carbon fibers and adsorbed on triethylenediamine C6H12N2 from being released again from the triethylenediamine C6H12N2, thereby preventing the diffusion of radioactive organic iodine from the mask to other places. At the same time, the half-life can be safely reached with radioactive organic iodine collected and adsorbed on the discarded mask.

The perspective view of the disposable mask shown as an example. The disassembled perspective view of the mask of FIG. FIG. 2 is an end view taken along line AA in FIG. 1. The perspective view of the mask shown in a wearing state. The figure which shows the test apparatus of radioactive organic iodine removal efficiency. The perspective view of the disposable mask shown as another example. The disassembled perspective view of the mask of FIG. FIG. 7 is an end view taken along line BB in FIG. 6. The perspective view of the disposable mask shown as another example. FIG. 10 is an exploded perspective view of the mask of FIG. 9. FIG. 10 is an end view taken along the line CC of FIG. 9. FIG. 10 is an end view taken along the line DD of FIG. 9. The perspective view of the mask shown in a wearing state. The perspective view which shows another example of the 1st foreign material removal sheet. The perspective view which shows another example of the 2nd foreign material removal sheet. The perspective view which shows another example of an iodine collection sheet | seat. The end view similar to FIG. 11 of the mask using the iodine collection sheet | seat of another example. The perspective view which shows another example of an iodine collection sheet | seat. The end view similar to FIG. 11 of the mask using the iodine collection sheet | seat of another example. The perspective view of the disposable mask shown as another example. The perspective view of the disposable mask shown from the back side. The disassembled perspective view of the mask of FIG. FIG. 21 is an end view taken along line EE in FIG. 20. The perspective view of the mask shown in a wearing state. The perspective view of the disposable mask shown as another example. FIG. 26 is an end view taken along line FF in FIG. 25. FIG. 26 is an end view taken along line GG in FIG. 25. The end view similar to FIG. 26 of the mask using the iodine collection sheet | seat of FIG. The end view similar to FIG. 27 of the mask using the iodine collection sheet | seat of FIG. The front perspective view of the disposable mask shown as another example. The rear perspective view of the disposable mask of FIG. Perspective view of the mask shown in the wearing state FIG. 31 is an end view taken along the line HH in FIG. 30. FIG. 31 is an end view taken along the line II of FIG. 30.

The details of a disposable mask capable of removing radioactive organic iodine according to the present invention will be described below with reference to the accompanying drawings such as FIG. 1 which is a perspective view of a disposable mask 10A shown as an example. 2 is an exploded perspective view of the mask 10A of FIG. 1, and FIG. 3 is an end view taken along line AA of FIG. FIG. 4 is a perspective view of the mask 10A shown in a worn state. In FIG. 1, the vertical direction is indicated by an arrow L, and the horizontal direction is indicated by an arrow M. In FIG. 2, the second filter member 11B is not shown.

The disposable mask 10A (including disposable masks 10B to 10F described later) is a worker (wearer 40) engaged in work in a work space such as a nuclear facility or a medical facility where radioactive organic iodine (iodine gas) may be generated. ) Not only used, but if radioactive organic iodine (including gaseous radioactive cesium) is released into the atmosphere due to an accident, local residents (wearers) who may be contaminated by the radioactive organic iodine or radioactive cesium 40) to prevent the wearer 40 from entering radioactive organic iodine or radioactive cesium into the body.

The disposable mask 10A (including disposable masks 10B to 10F, which will be described later) is a disposable that is discarded after one or several uses within a predetermined period, and the radioactive organic iodine or gaseous radioactive cesium is put into the body. Not only prevents entry, but also prevents entry of foreign matter such as dust, pollen, germs, and viruses into the body. Nuclear power facilities include nuclear power plants, intermediate storage facilities, reprocessing plants, MOX fuel plants, fast breeder reactors, fast breeder reactor fuel factories, fast breeder reactor reprocessing plants, and high-level radioactive waste final disposal. There are facilities.

The disposable mask 10 A includes a filter member 11 that covers the entire mouth and nostril of the wearer 40, and an ear hooking member 12 (mounting member) that is worn on both ears of the wearer 40. When the wearer 40 wears the mask 10A, the filter member 11 includes a first filter member 11A located substantially on the left side from the center line of the face of the wearer 40 and a right side of the center line of the face of the wearer 40. The second filter member 11B is positioned. The filter member 11 is formed into a three-dimensional shape (three-dimensional structure) in which the first and

second filter members

11A and 11B are convex forward from the face of the wearer 40.

The ear hook member 12 is made separately from the filter member 11 and is formed of a first ear hook member 12A that is hung on the wearer's 40 left ear and a second ear hook member 12B that is hung on the wearer's 40 right ear. Yes. These

ear hook members

12A and 12B are made of a fiber nonwoven fabric made of a plurality of thermoplastic synthetic resin fibers having air permeability (stretchable or non-stretchable hydrophobic fiber nonwoven fabric, stretchable or non-stretchable hydrophilic fiber nonwoven fabric). ). These

ear hook members

12A and 12B have a free portion 13 formed in a substantially annular shape and a connecting end portion 14 extending in a substantially straight shape in the vertical direction. The connection end 14 of the first ear hook member 12A is connected to the first filter member 11A, and the connection end 14 of the second ear hook member 12B is connected to the second filter member 11B.

The first and

second filter members

11A and 11B have an upper end 15 and a lower end 16 extending in the horizontal direction, and an inner end 17 and an outer end 18 extending in the vertical direction. As shown in the exploded perspective view of FIG. 2, the first and second filter members 11 A and 11 B are disposed on the skin side of the wearer 40 and on the outer side of the first foreign matter removal sheet 19. The iodine collecting sheet 20 located on the outside and the second foreign matter removing sheet 21 located on the outer side (non-skin side of the wearer 40) of the iodine collecting sheet 20 are formed.

The first and second foreign

matter removing sheets

19 and 21 are substantially the same shape and size, and are molded (three-dimensionally cut) into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. The iodine collection sheet 20 is slightly smaller than the foreign

matter removal sheets

19 and 21 and is molded (three-dimensionally cut) into a substantially rectangular sheet having a predetermined area and a predetermined thickness.

In the first foreign matter removing sheet 19 and the iodine collecting sheet 20, the skin non-facing surface of the foreign matter removing sheet 19 and the skin facing surface of the iodine collecting sheet 20 overlap each other. The surfaces of the

sheets

19 and 20 are not fixed to each other. In the iodine collection sheet 20 and the second foreign matter removal sheet 21, the skin non-facing surface of the iodine collection sheet 20 and the skin facing surface of the foreign matter removal sheet 21 overlap each other. The surfaces of the

sheets

20 and 21 are not fixed to each other. The surfaces of the

sheets

19 and 20 are fixed to at least one of the surfaces of the

sheets

19 and 20 via a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape. The surfaces of the

sheets

20 and 21 may be connected to each other via a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape to at least one of the surfaces of the

sheets

20 and 21. May be fixed.

The first foreign matter removal sheet 19 and the second foreign matter removal sheet 21 are such that the peripheral portions of the foreign

matter removal sheets

19 and 21 extending outward from the peripheral edge of the iodine collection sheet 20 overlap each other, and the foreign

matter removal sheet

19 , 21 are heat-sealed (fixed) by heat-welding wires extending linearly or in the form of dots. The

sheets

19 and 21 are fused by ultrasonic sealing or heat sealing. Therefore, in the first and

second filter members

11A and 11B, the iodine collection sheet 20 is interposed between the first and second foreign

matter removal sheets

19 and 21, and is fixed to the foreign

matter removal sheets

19 and 21. At the same time, the foreign

matter removing sheets

19 and 21 are fixed to each other. The iodine collection sheet 20 is not exposed to the outside from the periphery of the foreign

matter removal sheets

19 and 21, and is entirely covered with the foreign

matter removal sheets

19 and 21. In addition, the peripheral part of these foreign

material removal sheets

19 and 21 may be fixed by the hot melt adhesive.

In the first filter member 11A and the second filter member 11B, the inner end portions 17 of the

filter members

11A and 11B overlap each other, and linear or dotted in the vertical direction along the inner end portions 17 of the

filter members

11A and 11B. It is heat-sealed (fixed) via a heat-sealing part extending in a shape. These

members

11A and 11B are fused by ultrasonic sealing or heat sealing. The first filter member 19 and the second filter member 21 are connected at the inner end 17 of the

filter members

11A and 11B.

The connection end 14 of the first ear hooking member 12A overlaps the outer end 18 of the first filter member 11A (intervened between the first and second foreign matter removal sheets 19 and 21), and is linear in the vertical direction. Alternatively, it is heat-sealed (fixed) to the first filter member 11A via a point-shaped heat-sealing part (ultrasonic sealing or heat sealing). The connection end 14 of the second ear hooking member 12B overlaps the outer end 18 of the second filter member 11B (intervened between the first and second foreign matter removal sheets 19 and 21), and is linear in the vertical direction. Or it is heat-sealed (fixed) to the second filter member 11B via a heat-sealed portion extending in a dot shape (ultrasonic sealing or heat sealing).

In order to wear this disposable mask 10A, the free parts 13 of the

ear hooking members

12A and 12B are hung on both ears of the wearer 40 as shown in FIG. When the wearer 40 wears the mask 10A, the upper and lower ends 15, 16 and the outer end 18 of the first and

second filter members

11A, 11B and the first and second

ear hooking members

12A, 12B are the wearer 40's. Abutting on the face, the filter member 11 covers the entire mouth and nostril of the wearer 40. In the disposable mask 10A, the mask 10A is fixed to the face of the wearer 40 by hanging the free part 13 of the first ear hooking member 12A on the right ear and the free part 13 of the second ear hooking member 12B on the left ear. Inadvertent displacement and dropping of the mask 10A from the face of the wearer 40 are prevented.

The wearer 40 enters the work space of a nuclear facility or medical facility where radioactive organic iodine (iodine gas) may be generated while wearing the mask 10A, and performs work. In addition, when radioactive organic iodine or gaseous radioactive cesium is released into the atmosphere due to an accident, a local resident (wearer 40) who may be contaminated by the radioactive organic iodine or radioactive cesium wears the mask 10A, Wait for the half-life of radioactive organic iodine while living in the area.

For the first foreign matter removing sheet 19, a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers and a plurality of water absorbent fibers is used. The first foreign material removal sheet 19 can be made of a fiber nonwoven fabric having air permeability made from a plurality of thermoplastic synthetic resin fibers, or a plurality of thermoplastic synthetic resin fibers and a plurality of water absorbing properties. A fiber nonwoven fabric having air permeability made of a fiber and a plurality of antibacterial fibers can be used.

These non-woven fabrics that form the first foreign matter removal sheet 19 are manufactured by the spun bond method, melt blow method, thermal bond method, chemical bond method, needle punch method, spun lace method, stitch bond method, and steam jet method. Made nonwovens can be used. As the thermoplastic synthetic resin fiber, polyester fiber, polypropylene fiber, polyethylene fiber, polyvinyl chloride fiber, nylon fiber, rayon fiber, vinylon fiber and the like can be used. For these fibers, modified cross-section fibers, hollow fibers, modified hollow fibers, side-by-side fibers, and core-sheath fibers can also be used.

Water-absorbing fibers include polyacrylic acid polymers, hydrolyzed starch / acrylonitrile graft polymers, carboxymethylcellulose cross-linked products, polyacrylates, polyoxyethylene, polyvinyl alcohol / maleic anhydride, acetic acid Fibers produced by spinning vinyl-acrylate-based water-absorbing resins can be used.

In addition, it is preferable to use a side-by-side fiber or a core-sheath fiber for the water-absorbing fiber in order to increase its waist and rigidity. In this case, it is preferable to use a polyolefin fiber such as a low-density polyethylene fiber, a high-density polyethylene fiber, or a polyethylene fiber as one of the side-by-side fiber and the core-sheath fiber. Moreover, it is preferable to add an inorganic filler to the water-absorbing fiber in order to roughen the surface and prevent blocking and adhesion between the fibers in a dry state.

The ratio (ratio) of the water-absorbing fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. When the ratio of the water-absorbing fibers is less than 10% by weight, the moisture removing function of the first foreign matter removing sheet 19 is lowered, and the moisture contained in the air passing through the foreign matter removing sheet 19 and the moisture contained in the breath of the wearer 40 Cannot be sufficiently absorbed by the foreign matter removal sheet 19. When the ratio of the water-absorbing fibers exceeds 20% by weight, the waist and strength of the foreign matter removal sheet 19 when absorbing moisture by the first foreign matter removal sheet 19 and the sheet form maintaining function are lowered, and the sheet form is used when the mask 10A is used. May not be able to maintain. Since the first foreign matter removing sheet 19 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture (moisture) absorption function.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the first foreign matter removing sheet 19 is in the range of 3 to 50 μm, preferably in the range of 10 to 50 μm, more preferably in the range of 20 to 50 μm. When the average fiber diameter is less than 3 μm, when the basis weight of the foreign matter removing sheet 19 is unnecessarily low, the waist and strength of the foreign matter removing sheet 19 and the sheet shape maintaining function are lowered, and the mask shape of FIG. 1 cannot be processed. In addition, the foreign matter removal sheet 19 is likely to be damaged, and the sheet form may not be maintained when the mask 10A is used. When the average fiber diameter exceeds 50 μm, when the basis weight of the foreign substance removal sheet 19 is higher than necessary, the pressure loss of the foreign substance removal sheet 19 increases, the surface speed of the foreign substance removal sheet 19 decreases, and the ventilation in the foreign substance removal sheet 19 The degree decreases. As a result, the breathability of the mask 10A is reduced, and the smooth breathing of the wearer 40 wearing the mask 10A may be harmed. In addition, in the 1st foreign material removal sheet 19, the average fiber diameter of the thermoplastic synthetic resin fiber which produces it is larger than that of the thermoplastic synthetic resin fiber which produces the 2nd foreign material removal sheet 21. FIG. However, the average fiber diameters of the thermoplastic synthetic resin fibers that form the first and second foreign

matter removal sheets

19 and 21 may be the same.

The basis weight of the first foreign matter removing sheet 19 is in the range of 1.5 to 50 g / m ² , preferably in the range of 1.5 to 30 g / m ² , more preferably in the range of 1.5 to 20 g / m ² . It is in. If the basis weight is less than 1.5 g / m ² , if the average fiber diameter of the thermoplastic synthetic resin fibers that make up the foreign material removal sheet 19 is unnecessarily small, the waist and strength of the foreign material removal sheet 19, the sheet shape maintenance function decreases, In some cases, the mask shape of FIG. 1 cannot be processed, and the foreign material removal sheet 19 is easily damaged, and the sheet shape may not be maintained when the mask 10A is used. When the basis weight exceeds 50 g / m ² , when the average fiber diameter of the thermoplastic synthetic resin fiber forming the foreign matter removal sheet 19 is larger than necessary, the pressure loss of the foreign matter removal sheet 19 increases and the surface speed of the foreign matter removal sheet 19 increases. Decreases, and the air permeability in the foreign material removal sheet 19 decreases. As a result, the breathability of the mask 10A is reduced, and the smooth breathing of the wearer 40 wearing the mask 10A may be harmed. Note that the basis weight of the first foreign matter removal sheet 19 is smaller than that of the second foreign matter removal sheet 21. However, the basis weights of the first and second foreign

matter removal sheets

19 and 21 may be the same.

The thickness dimension of the first foreign matter removing sheet 19 is in the range of 0.2 to 3 mm, preferably in the range of 0.2 to 2 mm, and more preferably in the range of 0.2 to 1 mm. If the thickness dimension is less than 0.2 mm, the average fiber diameter of the thermoplastic synthetic resin fibers that make up the foreign matter removal sheet 19 is unnecessarily small and the basis weight of the foreign matter removal sheet 19 is lower than necessary. When the strength and the sheet form maintaining function are lowered and the mask form of FIG. 1 may not be processed, and the foreign matter removing sheet 19 is easily damaged and the sheet form cannot be maintained when the mask 10A is used. There is. When the thickness dimension exceeds 3 mm, the thickness dimension of the mask 10A becomes unnecessarily large, the mask 10A becomes bulky, and the rigidity of the mask 10A increases to reduce its flexibility, wearing feeling, and texture. Note that the thickness of the first foreign matter removing sheet 19 is smaller than that of the second foreign matter removing sheet 21. However, the thickness dimension of the 1st and 2nd foreign material removal sheets 10 and 21 may be the same.

The surface speed of the first foreign matter removing sheet 19 is in the range of 10 to 16 cm / sec. When the surface speed of the first foreign matter removing sheet 19 is less than 10 cm / sec, the air permeability in the foreign matter removing sheet 19 is low, the air permeability of the mask 10A is lowered, and the smooth breathing of the wearer 40 wearing the mask 10A is harmed. May be. When the surface speed exceeds 16 cm / sec, when the air is sucked by the breathing of the wearer 40, the speed of the air passing through the foreign material removal sheet 19 becomes higher than necessary, and moisture (water) is given to the foreign material removal sheet 19. It may not be absorbed. The surface speed of the first foreign matter removal sheet 19 is larger than that of the second foreign matter removal sheet 21. However, the surface speed of the first foreign matter removal sheet 19 may be the same as that of the second foreign matter removal sheet 21.

When the first foreign matter removal sheet contains antibacterial fibers, the ratio (ratio) of the antibacterial fibers to the total weight of the first foreign matter removal sheet is in the range of 5 to 10% by weight, preferably 7 to 8% by weight. It is in the range. If the ratio of the antibacterial fiber is less than 5% by weight, the antibacterial action and antiviral action of the first foreign matter removal sheet are reduced, and it may not be possible to sterilize or disinfect bacteria and viruses that pass through the foreign matter removal sheet. . When the ratio of the antibacterial fiber exceeds 10% by weight, the rigidity of the foreign matter removing sheet is increased, the flexibility of the foreign matter removing sheet is lowered, and the wearing feeling and texture of the foreign matter removing sheet are lowered. The first foreign matter removing sheet has excellent antibacterial action and antiviral action when it contains the antibacterial fibers in the above ratio in addition to the thermoplastic synthetic resin fibers.

The second foreign matter removing sheet 21 is made of a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers and a plurality of antibacterial fibers. The second foreign matter removing sheet 21 can be made of a nonwoven fabric having air permeability made from a plurality of thermoplastic synthetic resin fibers, or a plurality of thermoplastic synthetic resin fibers and a plurality of water absorbing properties. A fiber nonwoven fabric having air permeability made from fibers can be used. The manufacturing method of these fiber nonwoven fabrics forming the second foreign material removal sheet 21 is the same as that of those fiber nonwoven fabrics forming the first foreign material removal sheet 19, and the thermoplastic synthetic resin fiber is the first foreign material removal sheet 19. These are the same as those of the nonwoven fabrics that form. The water absorbent fiber is the same as that used for the first foreign matter removing sheet 19.

In the second foreign matter removing sheet 21, the thermoplastic synthetic resin fibers that make it are electretized. As an example of electretization of the second foreign matter removal sheet 21, an electret processing device is used, the distance between the needle-like electrode is set to 25 mm, the applied voltage is set to 25 kv, and the processing temperature is set to 80 ° C. I do. In addition, the thermoplastic synthetic resin fiber which makes the 1st foreign material removal sheet 19 may be electret-ized like the 2nd foreign material removal sheet 21. FIG. Moreover, the thermoplastic synthetic resin fiber which makes the 2nd foreign material removal sheet 21 does not need to be electretized.

The ratio (ratio) of the water-absorbing fibers to the total weight of the second foreign matter removal sheet 21 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. When the ratio of the water-absorbing fibers is less than 10% by weight, the moisture removing function of the second foreign matter removing sheet 21 is lowered, and the moisture contained in the air passing through the foreign matter removing sheet 21 and the moisture contained in the breath of the wearer 40 Cannot be sufficiently absorbed by the foreign substance removal sheet 21. When the ratio of the water-absorbing fibers exceeds 20% by weight, the waist and strength of the foreign matter removal sheet 21 at the time of moisture absorption by the second foreign matter removal sheet 21 and the sheet shape maintaining function are deteriorated, and the sheet form when the mask 10A is used. May not be able to maintain. Since the second foreign matter removing sheet 21 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture absorption function.

As antibacterial fibers, silver fine particles, silver supported inorganic fine particles, fibers with inorganic antibacterial fine particles adhered to the surface, or silver fine particles, silver supported inorganic fine particles, fibers mixed with inorganic antibacterial fine particles, etc. are used. can do. Inorganic antibacterial fine particles include inorganic antibacterial fine particles and titanium oxide inorganic antibacterial fine particles in which metal ions having antibacterial action such as silver ions, copper ions, zinc ions and tin ions are held in an inorganic carrier. Although it can be used, it is preferable to use inorganic antibacterial fine particles in which silver ions are held on an inorganic carrier. As the inorganic carrier, zeolite, zirconium phosphate, calcium phosphate and the like can be used, but it is preferable to use zeolite having a high ion exchange function. The content of the inorganic antibacterial fine particles in the fiber kneaded with the inorganic antibacterial fine particles is in the range of 0.01 to 10% by weight, preferably in the range of 0.05 to 5% by weight with respect to 100% by weight of the fiber. More preferably, it is in the range of 0.1 to 2% by weight.

The ratio (ratio) of the antibacterial fiber to the total weight of the second foreign matter removing sheet 21 is in the range of 5 to 10% by weight, and preferably in the range of 7 to 8% by weight. When the ratio of antibacterial fibers is less than 5% by weight, the antibacterial action and antiviral action of the second foreign matter removal sheet 21 are reduced, and it is not possible to sterilize or disinfect the bacteria and viruses that pass through the foreign matter removal sheet 21 There is. When the ratio of the antibacterial fibers exceeds 10% by weight, the rigidity of the foreign matter removal sheet 21 is increased, the flexibility of the foreign matter removal sheet 21 is lowered, and the wearing feeling and texture of the foreign matter removal sheet 21 are lowered. Since the second foreign matter removing sheet 21 contains antibacterial fibers in addition to the thermoplastic synthetic resin fibers in the above ratio, it has an excellent antibacterial action and antiviral action.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the second foreign matter removing sheet 21 is in the range of 0.5 to 30 μm, preferably 0.5 to 15 μm, more preferably 0.5 to 10 μm. When the average fiber diameter is less than 0.5 μm, when the basis weight of the foreign matter removing sheet 21 is lower than necessary, the waist and strength of the foreign matter removing sheet 21 and the sheet shape maintaining function are lowered, and the mask shape shown in FIG. 1 can be processed. In some cases, the foreign matter removing sheet 21 is easily damaged, and the sheet form may not be maintained when the mask 10A is used. When the average fiber diameter exceeds 30 μm, when the basis weight of the foreign substance removal sheet 21 is higher than necessary, the pressure loss of the foreign substance removal sheet 21 increases, the surface speed of the foreign substance removal sheet 21 decreases, and the ventilation in the foreign substance removal sheet 21 The degree decreases. As a result, the breathability of the mask 10A is reduced, and the smooth breathing of the wearer 40 wearing the mask 10A may be harmed. In addition, in the 2nd foreign material removal sheet 21, the average fiber diameter of the thermoplastic synthetic resin fiber which forms it is smaller than that of the thermoplastic synthetic resin fiber which forms the 1st foreign material removal sheet 19. FIG.

The basis weight of the second foreign matter removing sheet 21 is in the range of 10 to 100 g / m ² , preferably in the range of 30 to 100 g / m ² , and more preferably in the range of 50 to 100 g / m ² . When the basis weight is less than 10 g / m ² , when the average fiber diameter of the thermoplastic synthetic resin fiber forming the foreign matter removing sheet 21 is smaller than necessary, the waist and strength of the foreign matter removing sheet 21 and the sheet shape maintaining function are lowered. In some cases, the foreign matter removal sheet 21 is easily damaged, and the sheet form may not be maintained when the mask 10A is used. When the basis weight exceeds 100 g / m ² , when the average fiber diameter of the thermoplastic synthetic resin fiber that forms the foreign substance removal sheet 21 is larger than necessary, the pressure loss of the foreign substance removal sheet 21 increases and the surface speed of the foreign substance removal sheet 21 increases. Decreases, and the air permeability in the foreign matter removal sheet 21 decreases. As a result, the breathability of the mask 10A is reduced, and the smooth breathing of the wearer 40 wearing the mask 10A may be harmed. Note that the basis weight of the second foreign matter removal sheet 21 is larger than that of the first foreign matter removal sheet 19.

The thickness dimension of the second foreign matter removing sheet 21 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm. If the thickness dimension is less than 0.5 mm, the average fiber diameter of the thermoplastic synthetic resin fibers forming the foreign matter removal sheet 21 is unnecessarily small, and the basis weight of the foreign matter removal sheet 21 is lower than necessary. When the strength and the sheet form maintaining function are lowered and the mask form of FIG. 1 may not be processed, and the foreign matter removing sheet 21 is easily damaged, and the sheet form cannot be maintained when the mask 10A is used. There is. When the thickness dimension exceeds 3 mm, the thickness dimension of the mask 10A becomes unnecessarily large, the mask 10A becomes bulky, and the rigidity of the mask 10A increases to reduce its flexibility, wearing feeling, and texture. The second foreign matter removing sheet 21 has a thickness dimension larger than that of the first foreign matter removing sheet 19.

The surface speed of the second foreign material removal sheet 21 is in the range of 8 to 12 cm / sec. If the surface speed of the second foreign material removal sheet 21 is less than 8 cm / sec, the air permeability of the foreign material removal sheet 21 is low, the air permeability of the mask 10A is lowered, and the smooth breathing of the wearer 40 wearing the mask 10A is impaired. May be. If the surface speed exceeds 12 cm / sec, the speed of the air passing through the foreign material removal sheet 21 becomes higher than necessary when the wearer 40 breathes in air, and the foreign material removal sheet 21 has dust, pollen, etc. In some cases, the foreign matter cannot be adsorbed, and the foreign matter removal sheet 19 cannot absorb moisture. The surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20.

The iodine collection sheet 20 is a non-woven fabric having air permeability made of a plurality of activated carbon fibers having a high specific surface area and a large number of fine pores and collecting radioactive organic iodine and gaseous radioactive cesium. in use. The manufacturing method of these fiber nonwoven fabrics forming the iodine collection sheet 20 is the same as that of those fiber nonwoven fabrics forming the first and second foreign

matter removal sheets

19 and 21. In addition, the iodine collection sheet | seat 20 can also use the textile fabric or knitting (knit and felt) made from the some activated carbon fiber.

When the iodine collection sheet | seat 20 has a form of a fiber nonwoven fabric, while the air permeability and workability of the iodine collection sheet | seat 20 improve, the adsorption | suction rate of the radioactive organic iodine in the iodine collection sheet | seat 20 can be made quick. Moreover, when the iodine collection sheet | seat 20 has a form of a textile fabric or a knitting, while the air permeability and workability of the iodine collection sheet | seat 20 improve, the intensity | strength and flexibility of the iodine collection sheet | seat 20 can be improved. The activated carbon fiber is produced by firing and carbonizing an organic fiber, and further performing a heat treatment at a high temperature. Cellulose type, acrylic type, phenol type, and pitch type can be used for the activated carbon fiber. The activated carbon fiber is formed with a plurality of micropores extending in the thickness direction from the surface thereof.

The average fiber diameter of the activated carbon fiber forming the iodine collecting sheet 20 is in the range of 5 to 20 μm, preferably in the range of 7 to 18 μm, more preferably in the range of 10 to 16 μm. When the average fiber diameter is less than 5 μm, when the basis weight of the iodine collection sheet 20 is unnecessarily low, the strength of the iodine collection sheet 20 and the sheet shape maintenance function are lowered, and the iodine collection sheet 20 is easily damaged, The radioactive organic iodine collection function in the collection sheet 20 falls. When the average fiber diameter exceeds 20 μm, the geometric surface area of the activated carbon fiber is relatively reduced, and the radioactive organic iodine collection performance of the iodine collection sheet 20 may be lowered.

The basis weight of the iodine collection sheet 20 is in the range of 50 to 200 g / m ² , preferably in the range of 70 to 180 g / m ² , more preferably in the range of 80 to 150 g / m ² . When the basis weight is less than 50 g / m ² , when the average fiber diameter of the activated carbon fiber is smaller than necessary, the strength and the sheet form maintaining function of the iodine collection sheet 20 are lowered, and the iodine collection sheet 20 is easily damaged. The radioactive organic iodine collection function in the collection sheet 20 falls. When the basis weight exceeds 200 g / m ² , the rigidity of the iodine collection sheet 20 increases, and the flexibility, wearing feeling, and texture of the mask 10A decrease.

The thickness of the iodine collecting sheet 20 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm. If the thickness dimension is less than 0.5 mm, the average fiber diameter of the thermoplastic synthetic resin fiber that forms the foreign matter removal sheet 20 is unnecessarily small, and the basis weight of the foreign matter removal sheet 20 is lower than necessary, the strength of the iodine collection sheet 20 And the sheet form maintenance function falls, the iodine collection sheet | seat 20 tends to be damaged, and the radioactive organic iodine collection function in the iodine collection sheet | seat 20 falls. When the thickness dimension exceeds 3 mm, the thickness dimension of the mask 10A becomes unnecessarily large, the mask 10A becomes bulky, and the rigidity of the mask 10A increases to reduce its flexibility, wearing feeling, and texture.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10A is lowered, and the smooth breathing of the wearer 40 wearing the mask 10A may be impaired. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

Adsorbents that adsorb radioactive organic iodine and gaseous radioactive cesium are attached to the activated carbon fibers that form the iodine collection sheet 20. As the adsorbent, at least one of potassium iodide and potassium iodate, or triethylenediamine C6H12N2 (amines) is used. Triethylenediamine C6H12N2 is used as the amine. In addition to triethylenediamine C6H12N2, 1,4-diaza-2,2,2-picyclooctane, N, N′-bis- (3-amino Propyl) -piperazine, N, N-dimethyl-aminoethyl methacrylate, N, N-dimethylaminopropylamine, 3-aminopropyltrimethoxysilane, 1,5-diazabicycloundecene, poly-tert-butylaminoethyl Methacrylate, polyethyleneimine, 1,5-diazapicyclo [4,3,0] non-5-ene, 1,5-diazapicyclo [5,4,0] unde-7-5-ene, 2-methyl-1,4- Diazapicyclo [2,2,2] octane, phenylhydrazine, 2-cyanopyridine, diisopropylamine, Trimethyl aminoethyl piperazine, hexamethylene tetramine, may be used methyl pyromellitic ethyleneimine, one type of amine or amines obtained by mixing several kinds of them among the polyalkyl polyamine.

When potassium iodide or potassium iodate is used as the adsorbent, the amount of potassium iodide and potassium iodate added per unit weight (kg) of activated carbon fiber is in the range of 10 to 25% by weight / kg, preferably It is in the range of 15 to 25% by weight / kg, more preferably in the range of 20 to 25% by weight / kg. In the iodine collection sheet | seat 20, while radioactive organic iodine and gaseous radioactive cesium are collected by the micropore of activated carbon fiber, radioactive organic iodine and gaseous state are added to potassium iodide and potassium iodate adhering to activated carbon fiber. Of radioactive cesium is adsorbed.

If the amount of potassium iodide or potassium iodate added is less than 10% by weight, potassium iodide or potassium iodate may not be attached to the entire area of the activated carbon fiber, and via potassium iodide or potassium iodate, Radioactive organic iodine cannot be sufficiently adsorbed on activated carbon fibers, and the function of adsorbing radioactive organic iodine in the iodine collection sheet 20 may be insufficient. If the amount of potassium iodide or potassium iodate added exceeds 20% by weight, potassium iodide or potassium iodate may block the micropores of the activated carbon fiber, and radioactive organic iodine may be collected in the micropores. There are cases where it is impossible.

When triethylenediamine C6H12N2 is used as the adsorbent, the amount of triethylenediamine C6H12N2 applied to the unit weight (kg) of activated carbon fiber is in the range of 10 to 20% by weight / kg, preferably in the range of 12 to 18% by weight. Preferably, it is in the range of 13 to 16% by weight. In the iodine collection sheet 20, radioactive organic iodine and gaseous radioactive cesium are collected in activated carbon fiber micropores, and triethylenediamine C6H12N2 attached to the activated carbon fiber contains radioactive organic iodine and gaseous radioactive cesium. Adsorb.

If the amount of triethylenediamine C6H12N2 attached is less than 10% by weight, triethylenediamine C6H12N2 may not be attached to the entire area of the activated carbon fiber, and the radioactive organic iodine is sufficiently adsorbed to the activated carbon fiber via the triethylenediamine C6H12N2. In some cases, the adsorption function of radioactive organic iodine in the iodine collection sheet 20 may be insufficient. When the addition amount of triethylenediamine C6H12N2 exceeds 20% by weight, triethylenediamine C6H12N2 may block the micropores of the activated carbon fiber, and the radioactive organic iodine may not be collected in the micropores. In the case of using other amines, the amount of the amines attached to the unit weight (kg) of the activated carbon fiber is in the range of 10 to 20% by weight / kg, preferably in the range of 12 to 18% by weight. Preferably, it is in the range of 13 to 16% by weight.

FIG. 5 is a diagram showing a test apparatus 50 for removing radioactive organic iodine in an iodine collection sheet. When potassium iodide or potassium iodate is used as the adsorbent, the radioactive organic iodine removal efficiency of the iodine collection sheet 20 at an air humidity of 95% is in the range of 85 to 90%. When triethylenediamine C6H12N2 is used as the adsorbent, the radioactive organic iodine collection efficiency of the iodine collection sheet 20 at an air humidity of 95% is 95% or more, preferably 97% or more, more preferably 99.999%. That's it.

The iodine collection sheet 20 has potassium iodide or potassium iodate adsorbing radioactive organic iodine attached to the activated carbon fiber, and the iodine collection sheet 20 has a radioactive organic iodine removal efficiency of 85 to 85 at an air humidity of 95%. Because it is in the range of 90%, it exhibits excellent radioactive organic iodine removal performance under high humidity environment of air, and even if radioactive organic iodine is contained in the air, the radioactive organic iodine is reliably collected and adsorbed can do. In addition, the iodine collection sheet 20 has triethylenediamine C6H12N2 adsorbing radioactive organic iodine attached to activated carbon fibers, and the iodine collection sheet 20 has a radioactive organic iodine removal efficiency of 95% or more at an air humidity of 95%. Therefore, it exhibits excellent performance of removing radioactive organic iodine in a high humidity environment of air, and even if radioactive organic iodine is contained in the air, the radioactive organic iodine can be reliably collected and adsorbed.

The radioactive organic iodine removal efficiency in the iodine collection sheet | seat 20 was calculated based on the measurement result using the test apparatus 50 shown in FIG. The test apparatus 50 includes a cylinder 51, a gas flow meter 52, a photoacoustic gas monitor 53 (gas concentration measurement device), a cartridge 54, an air flow meter 55, and an intake pump 56. The cylinder 51, the gas flow meter 52, the photoacoustic gas monitor 53, the cartridge 54, the air flow meter 55, and the intake pump 56 are connected via a pipeline 57. A bypass line 58 is connected to the upstream line 57 and the downstream line 57 of the cartridge 54. The conduit 57 is provided with a switching valve (not shown) that switches between the inflow of air into the cartridge 54 and the inflow of air into the bypass conduit 58.

The cylinder 51 contains methyl iodide gas supplied to the pipe 57. First and

second test sheets

59A and 59B made from the iodine collection sheet 20 are detachably fixed to the cartridge 54. The photoacoustic gas monitor 53 is connected to the conduit 57 on the upstream side and the conduit 57 on the downstream side of the cartridge 54. The photoacoustic gas monitor 53 continuously measures the concentration of methyl iodide contained in the air flowing through the conduit 57. The specification of the first test sheet 59A is that the amount of potassium iodide or potassium iodate added is 20% by weight, the basis weight is 150 g / m ² , the thickness is 3 m, the specific surface area is 1400 to 1450, and the weight is 0.28 g. is there. The specifications of the second test sheet 59B are: the amount of triethylenediamine C6H12N2 is 16% by weight, the basis weight is 150 g / m ² , the thickness is 3 m, the specific surface area is 1400 to 1450, and the weight is 0.28 g.

The test procedure is as follows. The first test sheet 59A or the second test sheet 59B is fixed to the cartridge 54, the intake pump 56 and the photoacoustic gas monitor 53 are operated, and the measured value of the air flow meter 55 is confirmed while the predetermined flow rate (surface speed ( The air at a flow rate of 10 to 25 cm / sec) was flowed through the pipe 57, and the change in the dew point of the pipe 57 extending downstream of the cartridge 54 was monitored. When the dew point measurement value was a set value (air humidity 95%), the flow of air into the cartridge 54 was stopped via the switching valve, and a constant flow rate of air was passed through the bypass line 58. Next, while confirming the measurement value of the gas flow meter 52, a certain amount of methyl iodide gas is supplied from the cylinder 51 to the pipe 57, and the concentration of methyl iodide gas contained in the air is constant via the photoacoustic gas monitor 53. It was confirmed that the concentration was.

When the concentration of methyl iodide gas is a constant concentration, the flow of air into the bypass pipe 58 is stopped via the switching valve, and a constant flow of air is allowed to flow through the cartridge 54, and then the iodine is via the photoacoustic gas monitor 53. The concentration of methyl gas was measured continuously. Using the photoacoustic gas monitor 53, air is sampled from the pipe line 54 on the upstream side of the cartridge 54, the concentration of methyl iodide contained in the air is measured, and the air is drawn from the pipe line 57 on the downstream side of the cartridge 54. Sampling was performed to measure the concentration of methyl iodide contained in the air.

The concentration measurement of methyl iodide gas was continued until the concentration measurement value on the downstream side of the cartridge 54 reached 1/3 of the concentration measurement value on the upstream side of the cartridge 54. The methyl iodide removal efficiency (radioactive organic iodine removal efficiency) was calculated by the following formula. η = (C1-C2) / C1 × 100, where η is methyl iodide removal efficiency (radioactive organic iodine removal efficiency) (%), C1 is the concentration of methyl iodide contained in the air upstream of the cartridge 54 (Ppm), C2 is the concentration (ppm) of methyl iodide contained in the air on the downstream side of the cartridge 54.

As a test result, in the first test sheet 59A, methyl iodide removal efficiency (radioactive organic iodine removal efficiency) was 85 to 90%. In the second test sheet 59B, methyl iodide removal efficiency (radioactive organic iodine removal efficiency) was 99% or more. In the second test sheet 59B, the methyl iodide removal efficiency (radioactive organic iodine removal efficiency) was 99% or more, but 95% or more is the minimum as the radioactive organic iodine removal efficiency of the iodine collection sheet 20 determined therefrom. The efficiency is 99.999% or higher.

In the disposable mask 10A, a plurality of activated carbon fibers that make up the iodine collection sheet 20 collect radioactive organic iodine and gaseous radioactive cesium, and the adsorbent adhering to these activated carbon fibers is radioactive organic iodine or gaseous. Because radioactive cesium is adsorbed, even if radioactive organic iodine and radioactive cesium are contained in the air, radioactive organic iodine and radioactive cesium are reliably collected and adsorbed by the mask 10A, and the radioactive organic iodine and radioactive cesium pass through. It does not do, and it can prevent the entrance of radioactive organic iodine and radioactive cesium into the body of the wearer 40 wearing the mask 10A.

The disposable mask 10A is a disposable that is immediately discarded after it has collected and adsorbed radioactive organic iodine and gaseous radioactive cesium at a predetermined concentration, and has been collected by activated carbon fibers and adsorbed by an adsorbent. Organic iodine and radioactive cesium are not released again from the activated carbon fiber and the adsorbent, and it is possible to prevent the diffusion of radioactive organic iodine and radioactive cesium from the mask 10A to other places, and to the discarded mask 10A. The half-life can be safely reached while iodine is collected and adsorbed.

The disposable mask 10A not only collects and adsorbs radioactive organic iodine and gaseous radioactive cesium, but also has a normal mask function. The first and second foreign

matter removing sheets

19 and 21 allow dust and pollen, Since foreign substances such as various germs and viruses are collected, it is possible to prevent dust and pollen from adhering to the iodine collection sheet 20 and to prevent the foreign substances from entering the body of the wearer 40 wearing the mask 10A. be able to. In addition, the thermoplastic synthetic resin fiber which makes the 2nd foreign material removal sheet 21 is electretized, and the dust and pollen which entered the foreign material removal sheet 21 by the electrostatic effect | action of the 2nd foreign material removal sheet 21 become the foreign material removal sheet 21 Since it is efficiently collected, it is possible to reliably prevent dust and pollen from entering the body of the wearer 40.

In the disposable mask 10A, since the first and second foreign

matter removal sheets

19 and 21 contain a plurality of water-absorbing fibers, moisture contained in the air passing through the foreign

matter removal sheets

19 and 21 and the breath of the wearer 40 The moisture contained in the water is absorbed by the water-absorbent fibers and the dry state of the activated carbon fibers that make up the collection sheet 20 can be maintained, and the adsorbent adhering to the activated carbon fibers is absorbed by moisture in the air or the wearer 40. The activated carbon fiber does not fall off due to the moisture contained in the exhaled air, the surface of the activated carbon fiber is not wetted by the moisture, and it is possible to prevent a decrease in the collection function of the activated carbon fiber with respect to radioactive organic iodine. A decrease in the adsorption function of the adsorbent for organic iodine can be prevented.

Since the second foreign substance removal sheet 21 contains a plurality of antibacterial fibers, the disposable mask 10A is worn by sterilization or sterilization of germs and viruses contained in the air passing through the foreign substance removal sheet 21 by the antibacterial fibers. It is possible to prevent germs and viruses from entering the body of the person 40. In addition, since germs and viruses contained in the breath of the wearer 40 are sterilized or sterilized by the antibacterial fibers, it is possible to prevent germs and viruses from being released to the outside of the mask 10A.

In the disposable mask 10A, the surface speed of the second foreign matter removing sheet 21 is lower than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20, and when the wearer 40 sucks air or blows out air. Then, the flow of air in the mask 10A is suppressed by the second foreign matter removal sheet 21, and the sucked-in air or the blown-out air flows uniformly throughout the iodine collection sheet 20, so that a part of the iodine collection sheet 20 is quickly moved. Since it does not pass through and air does not pass through a part of the first foreign matter removing sheet 19 quickly, radioactive iodine and gaseous radioactive cesium are reliably collected and adsorbed on the iodine collecting sheet 20. Thus, moisture contained in the air can be reliably absorbed by the first and second foreign

matter removing sheets

19 and 21.

FIG. 6 is a perspective view of a disposable mask 10B shown as another example, and FIG. 7 is an exploded perspective view of the mask 10B of FIG. FIG. 8 is an end view taken along line BB of FIG. In FIG. 6, the vertical direction is indicated by an arrow L and the horizontal direction is indicated by an arrow M. The disposable mask 10 B includes a filter member 11 that covers the entire mouth and nostril of the wearer 40 and an ear hooking member 12 (a mounting member) that is worn on both ears of the wearer 40. The filter member 11 is formed into a three-dimensional shape (three-dimensional structure) that protrudes forward from the face of the wearer 40.

The filter member 11 has an upper end 15 and a lower end 16 extending in the horizontal direction, and an outer end 18 extending in the vertical direction. The filter member 11 includes a first foreign matter removal sheet 19 located on the skin side of the wearer 40, an iodine collection sheet 20 located outside the first foreign matter removal sheet 19, and an outside of the iodine collection sheet 20 ( It is formed from the 2nd foreign material removal sheet 21 located in the wearer's 40 non-skin side.

The ear hooking member 12 is made of a breathable fiber nonwoven fabric made of a plurality of thermoplastic synthetic resin fibers, and is hung on the first ear hooking member 12 A that hangs on the wearer's 40 left ear and the wearer's 40 right ear. The second ear hooking member 12B is formed. The connection end 14 of the first ear hooking member 12A is connected to the filter member 11, and the connection end 14 of the second ear hooking member 12B is connected to the filter member 11.

The first foreign matter removing sheet 19 is molded into a substantially rectangular sheet having a predetermined area and a predetermined thickness. The second foreign substance removal sheet 21 is molded (three-dimensionally cut) into a substantially rectangular sheet having a predetermined area and a predetermined thickness, and before being molded into the mask 10B as shown in the exploded perspective view of FIG. It is divided into two. The iodine collection sheet 20 is slightly smaller than the foreign

matter removal sheets

19 and 21 and is formed into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. The second foreign matter removing sheet 21 divided into two is heat-sealed through a heat-sealing portion extending linearly or in the form of a dot in the vertical direction with the inner end portions 22 of the foreign matter removing sheets 21 overlapping each other. (Fixed) (ultrasonic seal or heat seal).

The first foreign matter removal sheet 19 and the second foreign matter removal sheet 21 are such that the

lower end portions

23 and 24 of the foreign

matter removal sheets

19 and 21 overlap and the

lower end portions

23 and 24 of the foreign

matter removal sheets

19 and 21 are heat-melted. The

outer end portions

25 and 26 of the foreign

matter removing sheets

19 and 21 are overlapped, and the

outer end portions

25 and 26 of the foreign

matter removing sheets

19 and 21 are fixed by heat fusion (super Sonic seal or heat seal). These foreign

matter removal sheets

19 and 21 are not fixed at their

upper end portions

27 and 28. As shown in FIG. 7, a pocket 29 for accommodating the iodine collection sheet 20 in a detachable manner is defined between the first foreign matter removal sheet 19 and the second foreign matter removal sheet 21.

In the first ear hooking member 12A, the connecting end portion 14 overlaps the outer end portion 18 of the filter member 11 (intervened between the first and second foreign matter removing sheets 19 and 21), and is linear or dotted in the vertical direction. It is heat-sealed (fixed) to the filter member 11 via a heat-sealing portion extending in a shape (ultrasonic sealing or heat sealing). In the second ear hooking member 12B, the connecting end portion 14 overlaps the outer end portion 18 of the filter member 11 (intervened between the first and second foreign matter removing sheets 19 and 21), and is linear or dotted in the vertical direction. It is heat-sealed (fixed) to the filter member 11 via a heat-sealing portion extending in a shape (ultrasonic sealing or heat sealing).

In order to wear this disposable mask 10B, after the iodine collection sheet 20 is stored in the pocket 29, the free parts 13 of the

ear hooking members

12A and 12B are hung on both ears of the wearer 40 (indicated by FIG. 4). When the wearer 40 wears the mask 10B, the upper and lower ends 15, 16 and the outer end 18 of the filter member 11 and the first and second

ear hooking members

12A, 12B abut against the face of the wearer 40, and the filter member 11 covers the entire mouth and nostril of the wearer 40. In the disposable mask 10B, the mask 10B is fixed to the face of the wearer 40 by hanging the free part 13 of the first ear hooking member 12A on the right ear and the free part 13 of the second ear hooking member 12B on the left ear. Inadvertent displacement and dropping of the mask 10B from the face of the wearer 40 are prevented.

The wearer 40 enters a work space such as a nuclear facility or a medical facility where radioactive organic iodine (iodine gas) may be generated while wearing the mask 10B, and performs work. In addition, when radioactive organic iodine or gaseous radioactive cesium is released into the atmosphere due to an accident, a local resident (wearer 40) who may be contaminated by the radioactive organic iodine or radioactive cesium wears the mask 10B, Wait for the half-life of radioactive organic iodine while living in the area.

For the first foreign matter removing sheet 19, a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbing fibers and a plurality of antibacterial fibers is used. The first foreign matter removing sheet 19 can be made of a nonwoven fabric having air permeability made from a plurality of thermoplastic synthetic resin fibers and a plurality of water-absorbing fibers, or a plurality of thermoplastic synthetic materials. An air permeable nonwoven fabric made from resin fibers can be used.

The manufacturing method of those fiber nonwoven fabrics forming the first foreign material removal sheet 19 is the same as that of those fiber nonwoven fabrics forming the first foreign material removal sheet 19 of the mask 10A of FIG. It is the same as that of those fiber nonwoven fabrics which form the 1st foreign material removal sheet 19 of 1 mask 10A. The water absorbing fiber is the same as that used for the first foreign matter removing sheet 19 of the mask 10A of FIG. 1, and the antibacterial fiber is the same as that used for the second foreign matter removing sheet 21 of the mask 10A of FIG. Are identical. In addition, in the 1st foreign material removal sheet 19, the thermoplastic synthetic resin fiber which makes it is electretized.

The ratio (ratio) of the water-absorbing fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. The reason why the ratio of the water-absorbing fibers is within the above range is the same as that of the mask 10A in FIG. Since the first foreign matter removing sheet 19 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture (moisture) absorption function. Further, the ratio (ratio) of the antibacterial fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 5 to 10% by weight, preferably in the range of 7 to 8% by weight. The reason why the ratio of the antibacterial fibers is within the above range is the same as that of the mask 10A in FIG. Since the first foreign matter removing sheet 19 contains antibacterial fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent antibacterial action and antiviral action.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the first foreign matter removing sheet 19 is in the range of 3 to 50 μm, preferably in the range of 10 to 50 μm, more preferably in the range of 20 to 50 μm. The reason why the average fiber diameter of the thermoplastic synthetic resin fibers forming the first foreign matter removing sheet 19 is in the above range is the same as that of the mask 10A of FIG. In the 1st foreign material removal sheet 19, the average fiber diameter of the thermoplastic synthetic resin fiber which produces it is larger than that of the thermoplastic synthetic resin fiber which produces the 2nd foreign material removal sheet 21. FIG. The basis weight of the first foreign matter removing sheet 19 is in the range of 1.5 to 50 g / m ² , preferably in the range of 1.5 to 30 g / m ² , more preferably in the range of 1.5 to 20 g / m ² . It is in. The reason why the basis weight of the first foreign matter removing sheet 19 is in the above range is the same as that of the mask 10A in FIG. In the first foreign matter removing sheet 19, the basis weight thereof is smaller than that of the second foreign matter removing sheet 21. The thickness dimension of the first foreign matter removing sheet 19 is in the range of 0.2 to 3 mm, preferably in the range of 0.2 to 2 mm, and more preferably in the range of 0.2 to 1 mm. The reason why the thickness of the first foreign material removal sheet 19 is in the above range is the same as that of the mask 10A in FIG. The thickness of the first foreign matter removal sheet 19 is smaller than that of the second foreign matter removal sheet 21.

The surface speed of the first foreign matter removing sheet 19 is in the range of 10 to 16 cm / sec. The surface speed of the first foreign matter removal sheet 19 is larger than that of the second foreign matter removal sheet 21. When the surface speed of the first foreign matter removing sheet 19 is less than 10 cm / sec, the air permeability in the foreign matter removing sheet 19 is low, the air permeability of the mask 10B is lowered, and the smooth breathing of the wearer 40 wearing the mask 10B is harmed. May be. If the surface speed exceeds 16 cm / sec, when air is sucked by the wearer 40 breathing, the speed of the air passing through the foreign material removal sheet 19 becomes higher than necessary, and moisture (water) is applied to the foreign material removal sheet 10. It may not be absorbed.

The second foreign matter removing sheet 21 is made of a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers and a plurality of antibacterial fibers. The manufacturing method of those fiber nonwoven fabrics forming the second foreign material removal sheet 21 is the same as that of those fiber nonwoven fabrics forming the first foreign material removal sheet 19 of the mask 10A of FIG. It is the same as that of those fiber nonwoven fabrics which form the 1st foreign material removal sheet 19 of 1 mask 10A. The water absorbing fiber is the same as that used for the first foreign matter removing sheet 19 of the mask 10A of FIG. 1, and the antibacterial fiber is the same as that used for the second foreign matter removing sheet 21 of the mask 10A of FIG. Are identical. In the 2nd foreign material removal sheet 21, the thermoplastic synthetic resin fiber which makes it is electretized.

The ratio (ratio) of the water-absorbing fibers to the total weight of the second foreign matter removal sheet 21 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. The reason why the ratio of the water-absorbing fibers is within the above range is the same as that of the mask 10A in FIG. Since the second foreign matter removing sheet 21 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture absorption function. The ratio (ratio) of the antibacterial fibers to the total weight of the second foreign matter removing sheet 21 is in the range of 5 to 10% by weight, and preferably in the range of 7 to 8% by weight. The reason why the ratio of the antibacterial fibers is within the above range is the same as that of the mask 10A in FIG. Since the second foreign matter removing sheet 21 contains antibacterial fibers in addition to the thermoplastic synthetic resin fibers in the above ratio, it has an excellent antibacterial action and antiviral action.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the second foreign matter removing sheet 21 is in the range of 0.5 to 30 μm, preferably 0.5 to 15 μm, more preferably 0.5 to 10 μm. The reason why the average fiber diameter of the thermoplastic synthetic resin fibers forming the second foreign matter removing sheet 21 is in the above range is the same as that of the mask 10A of FIG. In the 2nd foreign material removal sheet 21, the average fiber diameter of the thermoplastic synthetic resin fiber which produces it is smaller than that of the thermoplastic synthetic resin fiber which produces the 1st foreign material removal sheet 19. FIG.

The basis weight of the second foreign matter removing sheet 21 is in the range of 10 to 100 g / m ² , preferably in the range of 30 to 100 g / m ² , and more preferably in the range of 50 to 100 g / m ² . The reason why the basis weight of the second foreign matter removal sheet 21 is in the above range is the same as that of the mask 10A of FIG. The basis weight of the second foreign matter removal sheet 21 is larger than that of the first foreign matter removal sheet 19. The thickness of the second foreign matter removing sheet 21 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm. The reason for setting the thickness dimension of the second foreign matter removal sheet 21 in the above range is the same as that of the mask 10A of FIG. In the second foreign matter removal sheet 21, the thickness dimension is larger than the thickness dimension of the first foreign matter removal sheet 19.

The surface speed of the second foreign material removal sheet 21 is in the range of 8 to 12 cm / sec. When the surface speed of the second foreign material removal sheet 21 is less than 8 cm / sec, the air permeability of the foreign material removal sheet 21 is low, the air permeability of the mask 10B is lowered, and the smooth breathing of the wearer 40 wearing the mask 10B is impaired. May be. If the surface speed exceeds 12 cm / sec, the speed of the air passing through the foreign material removal sheet 21 becomes higher than necessary when the wearer 40 breathes in air, and the foreign material removal sheet 21 has dust, pollen, etc. In some cases, the foreign matter cannot be adsorbed, and the foreign matter removal sheet 19 cannot absorb moisture. The surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20.

The iodine collection sheet 20 is a non-woven fabric having air permeability made of a plurality of activated carbon fibers having a high specific surface area and a large number of fine pores and collecting radioactive organic iodine and gaseous radioactive cesium. in use. The manufacturing method of these fiber nonwoven fabrics which form the iodine collection sheet | seat 20 is the same as that of the fiber nonwoven fabric which forms the 1st foreign material removal sheet 19 of the mask 10A of FIG. In addition, the iodine collection sheet | seat 20 can also use the textile fabric or knitting made from the some activated carbon fiber.

The average fiber diameter of the activated carbon fiber forming the iodine collection sheet 20 is in the range of 5 to 20 μm, preferably in the range of 7 to 18 μm, more preferably in the range of 10 to 16 μm. The reason why the average fiber diameter of the activated carbon fiber that forms the iodine collecting sheet 20 is in the above range is the same as that of the mask 10A of FIG. The basis weight of the iodine collection sheet 20 is in the range of 50 to 200 g / m ² , preferably in the range of 70 to 180 g / m ² , more preferably in the range of 80 to 150 g / m ² . The reason why the basis weight of the iodine collection sheet 20 is in the above range is the same as that of the mask 10A of FIG. The thickness of the iodine collecting sheet 20 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm. The reason why the thickness dimension of the iodine collection sheet 20 is in the above range is the same as that of the mask 10A of FIG.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10B is lowered, and the smooth breathing of the wearer 40 wearing the mask 10B may be impaired. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

Adsorbents that adsorb radioactive organic iodine and gaseous radioactive cesium are attached to the activated carbon fibers that form the iodine collection sheet 20. As the adsorbent, at least one of potassium iodide and potassium iodate, or triethylenediamine C6H12N2 (amines) is used. As amines, in addition to triethylenediamine C6H12N2, amines exemplified in the mask 10A of FIG. 1 can also be used.

When potassium iodide or potassium iodate is used as the adsorbent, the amount of potassium iodide and potassium iodate added per unit weight (kg) of activated carbon fiber is in the range of 10 to 25% by weight / kg, preferably It is in the range of 15 to 25% by weight / kg, more preferably in the range of 20 to 25% by weight / kg. The reason why the amount of potassium iodide or potassium iodate added is in the above range is the same as that of the mask 10A of FIG. In the iodine collection sheet 20, radioactive organic iodine is collected in activated carbon fibers or gaseous radioactive cesium micropores, and the radioactive organic iodine or gaseous substances are added to potassium iodide or potassium iodate attached to the activated carbon fibers. Of radioactive cesium is adsorbed.

When triethylenediamine C6H12N2 is used as the adsorbent, the amount of triethylenediamine C6H12N2 applied to the unit weight (kg) of activated carbon fiber is in the range of 10 to 20% by weight / kg, preferably in the range of 12 to 18% by weight. Preferably, it is in the range of 13 to 16% by weight. The reason why the amount of triethylenediamine C6H12N2 is within the above range is the same as that of the mask 10A of FIG. In the iodine collection sheet 20, radioactive organic iodine and gaseous radioactive cesium are collected in activated carbon fiber micropores, and triethylenediamine C6H12N2 attached to the activated carbon fiber contains radioactive organic iodine and gaseous radioactive cesium. Adsorb.

When potassium iodide or potassium iodate is used as the adsorbent, the radioactive organic iodine removal efficiency of the iodine collection sheet 20 at an air humidity of 95% is in the range of 85 to 90%. When triethylenediamine C6H12N2 is used as the adsorbent, the radioactive organic iodine collection efficiency of the iodine collection sheet 20 at an air humidity of 95% is 95% or more, preferably 97% or more, more preferably 99.999%. That's it. The radioactive organic iodine collection efficiency of the iodine collection sheet 20 of the mask 10B is determined based on the measurement result using the test apparatus shown in FIG. 5 in the same manner as the iodine collection sheet 20 of the mask 10A of FIG. It was.

This disposable mask 10B has the following effects in addition to the effects of the disposable mask 10A of FIG. In the disposable mask 10B, the iodine collection sheet 20 can be inserted into and removed from the pocket 29, and the iodine collection sheet 20 that has collected and adsorbed a predetermined concentration of radioactive organic iodine or gaseous radioactive cesium is taken out of the pocket 29 and newly formed. Since the iodine collection sheet 20 can be stored in the pocket 29, the mask 10B can be used a plurality of times by exchanging the iodine collection sheet 29, and the use period of the mask 10B can be extended.

FIG. 9 is a perspective view of a disposable mask 10C shown as another example, and FIG. 10 is an exploded perspective view of the mask 10C of FIG. 11 is an end view taken along the line CC of FIG. 9, and FIG. 12 is an end view taken along the line DD of FIG. FIG. 13 is a perspective view of the mask 10C shown in a worn state. In FIG. 9, the vertical direction is indicated by an arrow L, and the horizontal direction is indicated by an arrow M. The disposable mask 10 C includes a filter member 11 that covers the entire mouth and nostril of the wearer 40, and an ear hooking member 12 (mounting member) that is worn on both ears of the wearer 40.

The filter member 11 has an upper end portion 15 and a lower end portion 16 extending in the horizontal direction, and both side portions 18 extending in the vertical direction. The filter member 11 includes a first foreign matter removal sheet 19 located on the skin side of the wearer 40, an iodine collection sheet 20 located outside the first foreign matter removal sheet 19, and an outside of the iodine collection sheet 20 ( It is formed from the 2nd foreign material removal sheet 21 located in the wearer's 40 non-skin side. The ear hooking member 12 is made of a stretchable rubber string or cloth string, and a first ear hooking member 12A that is hung on the wearer's 40 left ear and a second ear hooking member 12B that is hung on the wearer's 40 right ear. Formed from. Part of the first and second ear hooking members 12 A and 12 B is connected to both side portions 18 of the filter member 11.

The first and second foreign

matter removing sheets

19 and 21 are substantially the same shape and size, and are formed into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. The iodine collection sheet 20 is slightly smaller than the foreign

matter removal sheets

19 and 21 and is formed into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. In the first foreign matter removing sheet 19 and the iodine collecting sheet 20, the skin non-facing surface of the foreign matter removing sheet 19 and the skin facing surface of the iodine collecting sheet 20 are overlapped with each other. The surfaces of the

sheets

20 and 21 are not fixed to each other. The surfaces of the

sheets

19 and 20 are fixed to at least one of the surfaces of the

sheets

20 and 21. May be fixed. The iodine collection sheet 20 is interposed between the first and second foreign

matter removal sheets

19 and 21 and is fixed to the foreign

matter removal sheets

19 and 21.

The first foreign matter removal sheet 19 and the second foreign matter removal sheet 21 are overlapped by overlapping the

upper end portions

27 and 28 of the foreign

matter removal sheets

19 and 21 extending outward from the upper end edge of the iodine collecting sheet 20. The

upper end portions

27 and 28 of the foreign

matter removal sheets

19 and 21 are heat-sealed (fixed) by the heat-sealing lines extending in the form of a straight line or dots, and those extending from the lower end edge of the iodine collecting sheet 20 to the outside. The

lower end portions

23 and 24 of the foreign

matter removal sheets

19 and 21 overlap each other, and the

lower end portions

23 and 24 of the foreign

matter removal sheets

19 and 21 are heat-sealed (adhered) by a heat-sealing line extending in a line shape or a dot shape in the lateral direction. (Ultrasonic seal or heat seal). Furthermore, both the

side portions

25 and 26 of the foreign

matter removing sheets

19 and 21 extending outward from both side edges of the iodine collecting sheet 20 are overlapped, and these foreign matters are removed by a heat-sealing line extending in a line shape or a dot shape in the vertical direction. Both

side portions

25 and 26 of the

sheets

19 and 21 are heat-sealed (fixed) (ultrasonic sealing or heat sealing). The iodine collecting sheet 20 has its upper and lower edges and both side edges not exposed to the outside from the

upper end portions

27 and 28, the

lower end portions

23 and 24, and the both

side portions

25 and 26 of the foreign

matter removing sheets

19 and 21, and the whole. Is encased in the foreign

matter removal sheets

19 and 21.

In the first ear hooking member 12A, the connecting end portion 14 is interposed between both

side portions

25 and 26 of the first and second foreign

matter removing sheets

19 and 21, and is formed in a dot shape, a line shape, or a spiral shape in the vertical direction. It is fixed to both

side portions

25 and 26 of the

sheets

19 and 21 through a hot melt adhesive (not shown) applied. The connection end portion 14 of the second ear hooking member 12B is interposed between both

side portions

25 and 26 of the first and second foreign

matter removing sheets

side portions

25 and 26 of the

sheets

19 and 21 through a hot melt adhesive (not shown) applied.

In order to wear this disposable mask 10C, the free portions 13 of the

ear hooking members

12A and 12B are hung on both ears of the wearer 40 as shown in FIG. When the wearer 40 wears the mask 10C, the upper and

lower end portions

15 and 16 and both side portions 18 of the filter member 11 and the first and second

ear hooking members

12A and 12B come into contact with the face of the wearer 40, and the filter member 11 Covers the mouth and nostrils of the wearer 40. In the disposable mask 10C, the mask 10C is fixed to the face of the wearer 40 by hanging the free part 13 of the first ear hooking member 12A on the right ear and the free part 13 of the second ear hooking member 12B on the left ear. Inadvertent displacement and dropping of the mask 10C from the face of the wearer 40 are prevented.

The wearer 40 enters the work space of a nuclear facility or a medical facility where radioactive organic iodine (iodine gas) may be generated while wearing the mask 10C, and performs work. In addition, if radioactive organic iodine is released into the atmosphere due to an accident, a resident (wearer 40) in a region that may be contaminated by the radioactive organic iodine wears the mask 10C and lives in that region while living in the region. Wait for the half-life of iodine.

The ratio (ratio) of the water-absorbing fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. The reason why the ratio of the water-absorbing fibers is within the above range is the same as that of the mask 10A in FIG. Since the first foreign matter removing sheet 19 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture (moisture) absorption function. Further, the ratio (ratio) of the antibacterial fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 5 to 10% by weight, preferably in the range of 7 to 8% by weight. The reason why the ratio of the antibacterial fibers is within the above range is the same as that of the mask 10A in FIG. The first foreign matter removing sheet 19 has an excellent antibacterial action and antiviral action since it contains the antibacterial fibers in addition to the thermoplastic synthetic resin fiber in the above ratio.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the first foreign matter removing sheet 19 is in the range of 3 to 50 μm, preferably in the range of 10 to 50 μm, more preferably in the range of 20 to 50 μm. The reason why the average fiber diameter of the thermoplastic synthetic resin fibers forming the first foreign matter removing sheet 19 is in the above range is the same as that of the mask 10A of FIG. In the 1st foreign material removal sheet 19, the average fiber diameter of the thermoplastic synthetic resin fiber which produces it is larger than that of the thermoplastic synthetic resin fiber which produces the 2nd foreign material removal sheet 21. FIG.

The basis weight of the first foreign matter removing sheet 19 is in the range of 1.5 to 50 g / m ² , preferably in the range of 1.5 to 30 g / m ² , more preferably in the range of 1.5 to 20 g / m ² . It is in. The reason why the basis weight of the first foreign matter removing sheet 19 is in the above range is the same as that of the mask 10A in FIG. In the first foreign matter removing sheet 19, the basis weight thereof is smaller than that of the second foreign matter removing sheet 21.

The thickness dimension of the first foreign matter removing sheet 19 is in the range of 0.2 to 3 mm, preferably in the range of 0.2 to 2 mm, and more preferably in the range of 0.2 to 1 mm. The reason why the thickness of the first foreign material removal sheet 19 is in the above range is the same as that of the mask 10A in FIG. The thickness of the first foreign matter removal sheet 19 is smaller than that of the second foreign matter removal sheet.

The surface speed of the first foreign matter removing sheet 19 is in the range of 10 to 16 cm / sec. The surface speed of the first foreign matter removal sheet 19 is larger than that of the second foreign matter removal sheet 21. When the surface speed of the first foreign matter removing sheet 19 is less than 10 cm / sec, the air permeability in the foreign matter removing sheet 19 is low, the air permeability of the mask 10C is lowered, and the smooth breathing of the wearer 40 wearing the mask 10C is harmed. May be. When the surface speed exceeds 16 cm / sec, when the air is sucked by the breathing of the wearer 40, the speed of the air passing through the foreign material removal sheet 19 becomes higher than necessary, and moisture (water) is given to the foreign material removal sheet 19. It may not be absorbed.

The second foreign matter removing sheet 21 is made of a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers and a plurality of antibacterial fibers. In addition, the 2nd foreign material removal sheet | seat 21 can use the fiber nonwoven fabric which has air permeability made from several thermoplastic synthetic resin fibers and several water absorbing fiber, or several thermoplastic synthetic | combination An air permeable nonwoven fabric made from resin fibers can be used.

The manufacturing method of these fiber nonwoven fabrics forming the first and second foreign

matter removal sheets

19 and 21 is the same as that of those fiber nonwoven fabrics forming the foreign

matter removal sheets

19 and 21 of the mask 10A in FIG. 1, and is a thermoplastic synthetic resin. The fibers are the same as those of the nonwoven fabrics forming the foreign

matter removing sheets

19 and 21 of the mask 10A of FIG. The water absorbing fiber is the same as that used for the first foreign matter removing sheet 19 of the mask 10A of FIG. 1, and the antibacterial fiber is the same as that used for the second foreign matter removing sheet 21 of the mask 10A of FIG. Are identical. In the first and second foreign

matter removing sheets

19 and 21, the thermoplastic synthetic resin fibers that make them are electretized.

The basis weight of the second foreign matter removing sheet 21 is in the range of 10 to 100 g / m ² , preferably in the range of 30 to 100 g / m ² , and more preferably in the range of 50 to 100 g / m ² . The reason why the basis weight of the second foreign matter removal sheet 21 is in the above range is the same as that of the mask 10A of FIG. The basis weight of the second foreign matter removal sheet 21 is larger than that of the first foreign matter removal sheet 19.

The thickness dimension of the second foreign matter removing sheet 21 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm. The reason for setting the thickness dimension of the second foreign matter removal sheet 21 in the above range is the same as that of the mask 10A of FIG. In the second foreign matter removal sheet 21, the thickness dimension is larger than the thickness dimension of the first foreign matter removal sheet 19.

The surface speed of the second foreign material removal sheet 21 is in the range of 8 to 12 cm / sec. When the surface speed of the second foreign material removal sheet 21 is less than 8 cm / sec, the air permeability of the foreign material removal sheet 21 is low, the air permeability of the mask 10C is lowered, and the smooth breathing of the wearer 40 wearing the mask 10C is harmed. May be. If the surface speed exceeds 12 cm / sec, the speed of the air passing through the foreign material removal sheet 21 becomes higher than necessary when the wearer 40 breathes in air, and the foreign material removal sheet 21 has dust, pollen, etc. In some cases, the foreign matter cannot be adsorbed, and the foreign matter removal sheet 19 cannot absorb moisture. The surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10C is lowered, and the smooth breathing of the wearer 40 wearing the mask 10C may be impaired. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

Adsorbents that adsorb radioactive organic iodine and gaseous radioactive cesium are attached to the activated carbon fibers that form the iodine collection sheet 20. As the adsorbent, at least one of potassium iodide and potassium iodate, or triethylenediamine C6H12N2 (amines) is used. As the amines, in addition to triethylenediamine C6H12N2, amines exemplified in the mask 10A of FIG. 1 can be used.

When triethylenediamine C6H12N2 is used as the adsorbent, the amount of triethylenediamine C6H12N2 applied to the unit weight (kg) of activated carbon fiber is in the range of 10 to 20% by weight / kg, preferably in the range of 12 to 18% by weight. Preferably, it is in the range of 13 to 16% by weight. The reason why the amount of triethylenediamine C6H12N2 is within the above range is the same as that of the mask 10A of FIG. In the iodine collection sheet 20, radioactive organic iodine is collected in activated carbon fibers or gaseous radioactive cesium micropores, and triethylenediamine C6H12N2 attached to the activated carbon fibers contains radioactive organic iodine or gaseous radioactive cesium. Adsorb.

When potassium iodide or potassium iodate is used as the adsorbent, the radioactive organic iodine removal efficiency of the iodine collection sheet 20 at an air humidity of 95% is in the range of 85 to 90%. When triethylenediamine C6H12N2 is used as the adsorbent, the radioactive organic iodine collection efficiency of the iodine collection sheet 20 at an air humidity of 95% is 95% or more, preferably 97% or more, more preferably 99.999%. That's it. The radioactive organic iodine collection efficiency of the iodine collection sheet 20 of the mask 10C is determined based on the measurement result using the test apparatus shown in FIG. 5 similarly to the iodine collection sheet 20 of the mask 10A of FIG. It was.

In the disposable mask 10C, a plurality of activated carbon fibers making up the iodine collection sheet 20 collect radioactive organic iodine and gaseous radioactive cesium, and the adsorbent adhering to these activated carbon fibers is radioactive organic iodine or gaseous. Since radioactive cesium is adsorbed, even if radioactive organic iodine or radioactive cesium is contained in the air, radioactive organic iodine or radioactive cesium is reliably collected and adsorbed on the mask 10C, and the radioactive organic iodine or radioactive cesium passes through. It does not do and it can prevent the entrance of radioactive organic iodine or radioactive cesium into the body of the wearer 40 wearing the mask 10C.

The disposable mask 10C is a disposable mask that is immediately discarded after it has collected and adsorbed radioactive organic iodine and gaseous radioactive cesium at a predetermined concentration, and has been collected by activated carbon fibers and adsorbed by an adsorbent. Organic iodine and radioactive cesium are not released again from the activated carbon fiber and the adsorbent, and it is possible to prevent the diffusion of radioactive organic iodine and radioactive cesium from the mask 10C to other places, and to the discarded mask 10C The half-life can be safely reached while iodine is collected and adsorbed.

The disposable mask 10C not only collects and adsorbs radioactive organic iodine and gaseous radioactive cesium, but also has a normal mask function. The first and second foreign matter removing sheets 10 and 21 allow dust and pollen, Since foreign substances such as various germs and viruses are collected, it is possible to prevent dust and pollen from adhering to the iodine collection sheet 20 and to prevent the foreign substances from entering the body of the wearer 40 wearing the mask 10C. be able to. The thermoplastic synthetic resin fibers that form the first and second foreign

matter removal sheets

19 and 21 are electretized, and dust and pollen that have entered the foreign

matter removal sheets

19 and 21 due to the electrostatic action of the foreign

matter removal sheets

19 and 21. Is efficiently collected by the foreign

matter removal sheets

19 and 21, it is possible to reliably prevent dust and pollen from adhering to the iodine collection sheet 20, and to ensure that dust and pollen enter the body of the wearer 40. Can be prevented.

In the disposable mask 10C, since the first and second foreign

matter removal sheets

19 and 21 contain a plurality of water-absorbing fibers, the moisture contained in the air passing through the foreign

matter removal sheets

19 and 21 and the breath of the wearer 40 The moisture contained in the water is absorbed by the water-absorbing fibers, and the activated carbon fibers that make up the collection sheet 20 can be maintained in a dry state. The activated carbon fiber does not fall off due to moisture contained in the exhaled air, the surface of the activated carbon fiber is not wetted by the moisture, and the collection function of the activated carbon fiber with respect to radioactive organic iodine can be prevented. A decrease in the adsorption function of the adsorbent for organic iodine can be prevented.

In the disposable mask 10C, since the first and second foreign matter removal sheets 10 and 21 contain a plurality of antibacterial fibers, various germs and viruses contained in the air passing through the foreign

matter removal sheets

19 and 21 are caused by the antibacterial fibers. It can be sterilized or sterilized to prevent the entry of germs and viruses into the body of the wearer 40. In addition, since germs and viruses contained in the breath of the wearer 40 are sterilized or sterilized by the antibacterial fibers, it is possible to prevent germs and viruses from being released to the outside of the mask 10C.

In the disposable mask 10C, the surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20, and when the wearer 40 sucks air or blows out air. Then, the flow of air in the mask 10C is suppressed by the second foreign matter removal sheet 21, and the sucked-in air or the blown-out air flows uniformly throughout the iodine collecting sheet 20, so that a part of the iodine collecting sheet 20 is quickly passed. Since it does not pass through and air does not pass through a part of the first foreign matter removing sheet 19 quickly, radioactive iodine and gaseous radioactive cesium are reliably collected and adsorbed on the iodine collecting sheet 20. Therefore, the moisture contained in the air can be reliably absorbed by the first and second foreign

matter removing sheets

19 and 21.

FIG. 14 is a perspective view showing another example of the first foreign matter removal sheet 19 used for the mask 10C, and FIG. 15 is a perspective view showing another example of the second foreign matter removal sheet 21 used for the mask 10C. FIG. The first foreign matter removing sheet 19 shown in FIG. 14 includes a water absorbent fiber nonwoven fabric 19a located on the iodine collecting sheet 20 (not shown) side and a water repellent (hydrophobic) located on the skin side of the wearer 40. It is formed from the fiber nonwoven fabric 19b.

The water-absorbing fiber nonwoven fabric 19a and the water-repellent fiber nonwoven fabric 19b are substantially the same shape and size, and are formed into a sheet that is long in the lateral direction. The water-absorbing fiber nonwoven fabric 19a is manufactured by the same manufacturing method as those fiber nonwoven fabrics that use the water-absorbing fibers described above and form the first foreign matter removing sheet 19 of the mask 10A of FIG. The water-repellent fiber nonwoven fabric 19b is manufactured by the same manufacturing method as those fiber nonwoven fabrics that use a plurality of thermoplastic synthetic resin fibers and form the first foreign matter removal sheet 19 of the mask 10A of FIG.

14, the skin facing surface of the water absorbent fiber nonwoven fabric 19a and the skin non-facing surface of the water repellent fiber nonwoven fabric 19b overlap each other. The surfaces of the

nonwoven fabrics

19a and 19b are not fixed to each other. As for the 1st foreign material removal sheet 19 and the iodine collection sheet | seat 20, the skin non-opposing surface of the water absorbing fiber nonwoven fabric 19a of the foreign material removal sheet 19 and the skin opposing surface of the iodine collection sheet | seat 20 mutually overlap. The surfaces of the nonwoven fabric 19a and the sheet 20 are not fixed to each other. The surfaces of the

nonwoven fabrics

19a and 19b are fixed to at least one of the surfaces of the

nonwoven fabrics

19a and 19b through a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape. The surfaces of the non-woven fabric 19a and the sheet 20 may be connected to each other via a hot melt adhesive (not shown) applied to at least one of the surfaces of the non-woven fabric 19a and the sheet 20 in the form of dots, lines, or spirals. May be fixed. The basis weight, thickness dimension, surface speed, and average fiber diameter of the thermoplastic synthetic resin fiber of the first foreign matter removing sheet 19 in FIG. 14 are the same as those of the first foreign matter removing sheet 19 in the mask 10A.

The second foreign matter removal sheet 21 shown in FIG. 15 includes a water absorbent fiber nonwoven fabric 21a located on the side of the iodine collection sheet 20 (not shown), and a water repellency (hydrophobic) located outside the water absorbent fiber nonwoven fabric 21a. ) Fiber nonwoven fabric 21b. The water-absorbing fiber nonwoven fabric 21a and the water-repellent fiber nonwoven fabric 21b are substantially the same shape and size, and are formed into a substantially rectangular sheet that is long in the lateral direction.

15, the skin non-facing surface of the water absorbent fiber nonwoven fabric 21a and the skin facing surface of the water repellent fiber nonwoven fabric 21b overlap each other. The surfaces of the

nonwoven fabrics

21a and 21b are not fixed to each other. As for the 2nd foreign material removal sheet 21 and the iodine collection sheet | seat 20, the skin opposing surface of the water absorbing fiber nonwoven fabric 21a of the foreign material removal sheet 21 and the skin non-opposing surface of the iodine collection sheet | seat 20 mutually overlap. The surfaces of the nonwoven fabric 21a and the sheet 20 are not fixed to each other. In addition, the surfaces of the

nonwoven fabrics

21a and 21b are fixed to at least one of the surfaces of the

nonwoven fabrics

21a and 21b via a hot melt adhesive (not shown) applied in a dot shape, a linear shape, or a spiral shape. The surfaces of the nonwoven fabric 19a and the sheet 20 may be connected to each other via a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape to at least one of the surfaces of the nonwoven fabric 21a and the sheet 20. May be fixed.

In the mask 10C using the first foreign matter removal sheet 19 of FIG. 14 and the second foreign matter removal sheet 21 of FIG. 15, the water absorbent

fiber nonwoven fabrics

19a and 21a forming the foreign

matter removal sheets

19 and 21 pass therethrough. The moisture contained in the air and the moisture contained in the exhalation of the wearer 40 can be absorbed, and the dry state of the activated carbon fiber forming the collection sheet 20 can be maintained, and the adsorbent attached to the activated carbon fiber is air. The activated carbon fiber does not fall off from the activated carbon fiber due to the moisture contained in it or the moisture contained in the exhalation of the wearer 40, the surface of the activated carbon fiber is not wetted by the moisture, and the collection function of the activated carbon fiber for radioactive organic iodine is reduced As well as a decrease in the adsorption function of the adsorbent for radioactive organic iodine.

16 is a perspective view showing another example of the iodine collection sheet 20 used for the mask 10C, and FIG. 17 is an end view similar to FIG. 11 of the mask 10C using the iodine collection sheet 20 of FIG. It is. This iodine collection sheet 20 is a fiber nonwoven fabric having air permeability made from a plurality of activated carbon fibers that collect radioactive organic iodine and gaseous radioactive cesium, and is formed into a substantially rectangular sheet shape that is long in the lateral direction. Furthermore, it is folded in an orderly manner in a zigzag so as to repeat undulations in the lateral direction (folded). The iodine collection sheet 20 has a plurality of peak portions 30 and a plurality of valley portions 31 that extend in the vertical direction and are arranged at substantially equal intervals in the horizontal direction. The above-mentioned adsorbent is attached to the activated carbon fiber that forms the iodine collection sheet 20.

The number of times the iodine collecting sheet 20 is folded in the lateral direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times, with respect to 1 cm in the lateral length of the sheet 20. The height dimension of the iodine collection sheet 20 from the crest 30 to the trough 31 is in the range of 0.5 to 3 mm. Note that the basis weight, thickness dimension, and surface speed of the iodine collection sheet 20 before bending are the same as those of the iodine collection sheet 20 in the mask 10A. Further, the iodine collection sheet 20 is folded (folded) in a zigzag manner so as to repeat ups and downs in the vertical direction, extends in the horizontal direction and is arranged at equal intervals in the vertical direction, and a plurality of valleys 31. It may have. In this case, the number of times of folding in the vertical direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times, with respect to 1 cm of the longitudinal length of the sheet 20.

In the iodine collection sheet 20 of FIG. 16, the skin facing surface and the skin non-facing surface of the first foreign matter removing sheet 19 overlap each other, and the skin non-facing surface and the skin facing surface of the second foreign matter removing sheet 21 are overlapped. Overlap each other. The surfaces of the

sheets

19 and 20 and the surfaces of the

sheets

20 and 21 are not fixed to each other. In addition,
A hot melt adhesive (not shown) applied in a dot shape, a line shape or a spiral shape is fixed to at least one of the surfaces of the

sheets

19 and 20 through the surfaces of the

sheets

19 and 20. Alternatively, a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape is fixed to at least one of the surfaces of the

sheets

20 and 21 through the surfaces of the

sheets

20 and 21. May be.

The iodine collection sheet 20 of FIG. 16 is folded in the transverse direction (or longitudinal direction) with the number of foldings within the above range, and therefore compared with the unfolded (unfolded) sheet 20. As a result, the surface area of the carbon dioxide increases, and the amount of air in contact with the activated carbon fibers increases accordingly, and the function of collecting and adsorbing radioactive organic iodine can be improved. As a result, the function of collecting and adsorbing radioactive organic iodine in the mask 10C can be improved, and the radioactive organic iodine can be reliably collected and adsorbed on the mask 10C. In addition, if the frequency | count of bending of the iodine collection sheet | seat 20 is less than ten times, the increase in the surface area of the sheet | seat 20 will run short, and the collection / adsorption function of the radioactive organic iodine in the sheet | seat 20 may be unable to be improved.

In the mask 10C using the iodine collection sheet 20 of FIG. 16, the iodine collection sheet 20 can be folded to be able to increase the volume of the iodine collection sheet 20 as compared with the unfolded iodine collection sheet 20. Since the basis weight and the surface area of the partial iodine collection sheet 20 can be increased, radioactive organic iodine and gaseous radioactive cesium can be reliably collected on a plurality of activated carbon fibers making the iodine collection sheet 20, Radioactive organic iodine and gaseous radioactive cesium can be reliably adsorbed on the adsorbent adhering to these activated carbon fibers. Even if the mask 10C contains radioactive organic iodine or gaseous radioactive cesium in the air, the radioactive organic iodine or radioactive cesium is reliably collected and adsorbed by the mask 10C, and the radioactive organic iodine or radioactive cesium passes through. It does not do and it can prevent the entrance of radioactive organic iodine and radioactive cesium into the body of the wearer 40 wearing the mask 10C.

18 is a perspective view showing another example of the iodine collection sheet 20 used for the mask 10C, and FIG. 19 is an end view similar to FIG. 11 of the mask 10C using the iodine collection sheet 20 of FIG. It is. This iodine collection sheet 20 is a fiber nonwoven fabric having air permeability made from a plurality of activated carbon fibers that collect radioactive organic iodine and gaseous radioactive cesium, and is formed into a sheet shape that is substantially rectangular in the lateral direction. Furthermore, the iodine collection sheet 20a that is folded in a zigzag manner (folded) so as to repeat undulations in the horizontal direction, and is folded in a zigzag manner (folded) so as to repeat the undulations in the vertical direction. It is formed from the iodine collection sheet | seat 20b.

The iodine collection sheet 20a has a plurality of peaks 30 and a plurality of valleys 31 arranged in the horizontal direction, and the iodine collection sheet 20b includes a plurality of peaks 30 and a plurality of valleys 31 arranged in the vertical direction. Have The above-mentioned adsorbent is attached to the activated carbon fibers that form the

iodine collection sheets

20a and 20b. The iodine collection sheet 20 may be one in which two iodine collection sheets 20a folded in a zigzag manner so as to repeat the undulation in the horizontal direction overlap in the thickness direction, or the undulation in the vertical direction. Two iodine collection sheets 20b bent in a zigzag orderly so as to repeat may overlap in the thickness direction.

The number of times the iodine collection sheet 20a is bent in the lateral direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times with respect to 1 cm in the lateral length of the sheet 20a. The number of times the iodine collecting sheet 20b is bent in the longitudinal direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times, with respect to the longitudinal length of 1 cm of the sheet 20b. The height dimension from the peak 30 to the valley 31 of the

iodine collection sheets

20a, 20b is in the range of 0.5 to 3 mm. Note that the basis weight, thickness dimension, and surface speed of the

iodine collection sheets

20a and 20b before bending are the same as those of the iodine collection sheet 20 in the mask 10A.

18, the skin non-facing surface of the iodine collecting sheet 20a and the skin facing surface of the iodine collecting sheet 20b overlap each other. The surfaces of the

sheets

20a and 20b are not fixed to each other. Note that the surfaces of the

sheets

20a and 20b are fixed to at least one of the surfaces of the

sheets

20a and 20b via a hot melt adhesive (not shown) applied in the form of dots, lines or spirals. It may be. In the iodine collection sheet 20, the skin facing surface of the iodine collection sheet 20a and the non-skin facing surface of the first foreign matter removal sheet 19 overlap each other, and the non-skin facing surface of the iodine collection sheet 20b and the second foreign matter removal are overlapped. The skin-facing surfaces of the sheet 21 overlap each other. The surfaces of the

sheets

19 and 20a and the surfaces of the

sheets

20b and 21 are not fixed to each other. The surfaces of the

sheets

19 and 20a are fixed to at least one of the surfaces of the

sheets

19 and 20a via a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape. The surfaces of the

sheets

20b and 21 may be connected to each other through a hot melt adhesive (not shown) applied in a dot shape, a line shape, or a spiral shape to at least one of the surfaces of the

sheets

20b and 21. May be fixed.

The iodine collection sheet 20 in FIG. 18 is folded at the number of foldings within the above range so as to repeat the undulation in the vertical direction and the iodine collection sheet 20a folded at the number of foldings within the above range so as to repeat the undulation in the horizontal direction. Since the surface is formed from the iodine collection sheet 20b, the surface area of the

sheets

20a and 20b is increased as compared with the unfolded (unfolded) sheet 20, and the air is more in the activated carbon fiber. It can contact and improve the collection and adsorption function of radioactive organic iodine. As a result, the function of collecting and adsorbing radioactive organic iodine in the mask 10C can be improved, and the radioactive organic iodine can be reliably collected and adsorbed on the mask 10C. In addition, if the frequency | count of bending of iodine collection sheet |

seat

20a, 20b is less than ten times, the increase in the surface area of sheet |

seat

20a, 20b is insufficient, and the collection / adsorption function of the radioactive organic iodine in sheet |

seat

20a, 20b can be improved. It may not be possible.

In the mask 10C using the iodine collecting sheet 20 of FIG. 18, the

iodine collecting sheets

20a and 20b are folded to increase the volume of the

iodine collecting sheets

20a and 20b as compared with the unfolded iodine collecting sheet 20. Since the basis weight and surface area of the

iodine collection sheets

20a and 20b can be increased by that amount, the radioactive organic iodine and the gaseous radioactive cesium are surely applied to the plurality of activated carbon fibers forming the

iodine collection sheets

20a and 20b. The radioactive organic iodine and the gaseous radioactive cesium can be reliably adsorbed to the adsorbent adsorbed on the activated carbon fibers. Even if the mask 10C contains radioactive organic iodine or gaseous radioactive cesium in the air, the radioactive organic iodine or radioactive cesium is reliably collected and adsorbed by the mask 10C, and the radioactive organic iodine or radioactive cesium passes through. It does not do and it can prevent the entrance of radioactive organic iodine and radioactive cesium into the body of the wearer 40 wearing the mask 10C.

FIG. 20 is a perspective view of a disposable mask 10D shown as another example, and FIG. 21 is a perspective view of the disposable mask 10D shown from the back side. FIG. 22 is an exploded perspective view of the mask 10D of FIG. 20, and FIG. 23 is an end view taken along the line EE of FIG. FIG. 24 is a perspective view of the mask 10D shown in a worn state. The disposable mask 10D includes a filter member 11 that covers the entire mouth and nostril of the wearer 40, a mounting member 12 that hangs on the head of the wearer 40, and a pad member 32 that contacts the face of the wearer 40 (see FIG. 21). And have.

The filter member 11 has a central portion 33 and a peripheral edge portion 34, and the central portion 33 is formed into a three-dimensional shape (three-dimensional structure) that protrudes forward from the face of the wearer 40. The filter member 11 includes a first foreign matter removal sheet 19 located on the skin side of the wearer 40, an iodine collection sheet 20 located outside the first foreign matter removal sheet 19, and an outside of the iodine collection sheet 20 ( It is formed from the 2nd foreign material removal sheet 21 located in the wearer's 40 non-skin side. The mounting member 12 is made of a rubber string having elasticity, and includes a first mounting member 12A that is hung on the head below the ear of the wearer 40 and a second mounting member 12B that is hung on the head on the ear of the wearer 40. Is formed. The end portions of the first and second mounting members 12 A and 12 B are connected to a length adjustment jig 37, and the length dimension can be freely adjusted in the jig 37.

The first and second foreign

matter removing sheets

19 and 21 are substantially the same shape and size, and are formed into a substantially circular sheet shape having a predetermined area and a predetermined thickness dimension. The iodine collection sheet 20 is slightly smaller than the foreign

matter removal sheets

19 and 21 and is formed into a substantially circular sheet shape having a predetermined area and a predetermined thickness dimension. As shown in FIG. 21, a plurality of heat-sealing wires 38 are formed on the first foreign material removal sheet 19 by press working, and the rigidity of the foreign material removal sheet 19 is increased by the heat fusion wires 38, and the foreign material The three-dimensional shapes of the

removal sheets

19 and 21 and the iodine collection sheet 20 are maintained. Accordingly, a three-dimensional shape that is convex forward from the face of the wearer 40 in the central portion 33 of the filter member 11 is maintained.

sheets

20 and 21 are not fixed to each other. The surfaces of the

sheets

19 and 20 are fixed to at least one of the surfaces of the

sheets

matter removal sheets

19 and 21 and is fixed to the foreign

matter removal sheets

19 and 21.

The first foreign matter removing sheet 19 and the second foreign matter removing sheet 21 are overlapped by the

peripheral portions

35 and 36 of the foreign

matter removing sheets

19 and 21 extending outward from the peripheral edge of the iodine collecting sheet 20. It is fixed to at least one of 35 and 36 via a hot melt adhesive (not shown) applied in a dot shape, a linear shape or a spiral shape. The iodine collecting sheet 20 is not exposed to the outside from the

peripheral portions

35 and 36 of the foreign

matter removing sheets

19 and 21, and is entirely covered with the foreign

matter removing sheets

19 and 21.

These length adjusting jigs 37 have mounting seats 39 interposed between the

peripheral portions

35 and 36 of the first and second foreign

matter removing sheets

19 and 21, and the foreign

matter removing sheets

19 and 21 are made of hot melt adhesive. The

peripheral portions

35 and 36 are fixed. The pad member 32 is made of a flexible foam material such as foamed urethane or foamed polystyrene, and is molded into a substantially annular shape. The pad member 32 is heat-sealed (adhered) to the peripheral edge 35 of the first foreign material removal sheet 19 by a heat-sealing wire whose outer peripheral edge extends substantially in an annular shape (ultrasonic sealing or heat sealing). The inner peripheral edge of the pad member 32 protrudes toward the central portion 33 of the mask 10D.

In order to wear this disposable mask 10D, after the length dimensions of the first and second mounting

members

12A and 12B are adjusted by the length adjusting jig 37, the first mounting member 12A is worn as shown in FIG. The second mounting member 12B is hung on the head above the wearer's ear. When the wearer 40 wears the mask 10D, the pad member 32 comes into contact with the face of the wearer 40, and the filter member 11 covers the entire mouth and nostril of the wearer 40. In the disposable mask 10D, the mask 10D is fixed to the face of the wearer 40 by hanging the free portions 13 of the first and second

ear hooking members

12A and 12B on the head, and the mask 10D from the face of the wearer 40 is fixed. Inadvertent displacement and dropout are prevented.

The wearer 40 enters a work space such as a nuclear facility or a medical facility where radioactive organic iodine (iodine gas) may be generated while wearing the mask 10D, and performs work. In addition, when radioactive organic iodine is released into the atmosphere due to an accident, a resident (wearer 40) in a region that is likely to be contaminated by the radioactive organic iodine or gaseous radioactive cesium wears the mask 10D, and in that region Wait for the half-life of radioactive organic iodine while living.

For the first foreign matter removing sheet 19, a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers and a plurality of water absorbent fibers is used. The first foreign matter removing sheet 19 can be made of a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers, and a plurality of antibacterial fibers, or A non-woven fiber nonwoven fabric made from a plurality of thermoplastic synthetic resin fibers can be used.

The ratio (ratio) of the water-absorbing fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 10 to 20% by weight, and preferably in the range of 15 to 20% by weight. The reason why the ratio of the water-absorbing fibers is within the above range is the same as that of the mask 10A in FIG. Since the first foreign matter removing sheet 19 contains water-absorbing fibers in the above ratio in addition to the thermoplastic synthetic resin fibers, it has an excellent moisture (moisture) absorption function. Further, when the first foreign matter removing sheet 19 contains antibacterial fibers, the ratio (ratio) of the antibacterial fibers to the total weight of the first foreign matter removing sheet 19 is in the range of 5 to 10% by weight, preferably 7 It is in the range of ˜8% by weight. The reason why the ratio of the antibacterial fibers is within the above range is the same as that of the mask 10A in FIG.

The basis weight of the first foreign matter removing sheet 19 is in the range of 1.5 to 50 g / m ² , preferably in the range of 1.5 to 30 g / m ² . The reason why the basis weight of the first foreign matter removing sheet 19 is in the above range is the same as that of the mask 10A in FIG. In the first foreign matter removing sheet 19, the basis weight thereof is smaller than that of the second foreign matter removing sheet 21. The thickness of the first foreign material removal sheet 19 is in the range of 0.2 to 3 mm, preferably in the range of 0.2 to 2 mm. The reason why the thickness of the first foreign material removal sheet 19 is in the above range is the same as that of the mask 10A in FIG. The thickness of the first foreign matter removal sheet 19 is smaller than that of the second foreign matter removal sheet 21.

The surface speed of the first foreign matter removing sheet 19 is in the range of 10 to 16 cm / sec. The surface speed of the first foreign matter removal sheet 19 is larger than that of the second foreign matter removal sheet 21. When the surface speed of the first foreign matter removing sheet 19 is less than 10 cm / sec, the air permeability in the foreign matter removing sheet 19 is low, the air permeability of the mask 10D is lowered, and the smooth breathing of the wearer 40 wearing the mask 10D is harmed. May be. When the surface speed exceeds 16 cm / sec, when the air is sucked by the breathing of the wearer 40, the speed of the air passing through the foreign material removal sheet 19 becomes higher than necessary, and moisture (water) is given to the foreign material removal sheet 19. It may not be absorbed.

The second foreign matter removing sheet 21 is made of a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers and a plurality of antibacterial fibers. In addition, the 2nd foreign material removal sheet 21 can use the fiber nonwoven fabric which has the air permeability made from several thermoplastic synthetic resin fibers.

matter removal sheets

matter removing sheets

19 and 21 of the mask 10A of FIG. The water absorbing fiber is the same as that used for the foreign

matter removing sheets

19 and 21 of the mask 10A of FIG. In the 2nd foreign material removal sheet 21, the thermoplastic synthetic resin fiber which makes them is electretized.

The surface speed of the second foreign material removal sheet 21 is in the range of 8 to 12 cm / sec. When the surface speed of the second foreign matter removing sheet 21 is less than 8 cm / sec, the air permeability in the foreign matter removing sheet 21 is low, the air permeability of the mask 10D is lowered, and the smooth breathing of the wearer 40 wearing the mask 10D is harmed. May be. If the surface speed exceeds 12 cm / sec, the speed of the air passing through the foreign material removal sheet 21 becomes higher than necessary when the wearer 40 breathes in air, and the foreign material removal sheet 21 has dust, pollen, etc. In some cases, the foreign matter cannot be adsorbed, and the foreign matter removal sheet 19 cannot absorb moisture. The surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10D is lowered, and the smooth breathing of the wearer 40 wearing the mask 10D may be harmed. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

When potassium iodide or potassium iodate is used as the adsorbent, the amount of potassium iodide and potassium iodate added per unit weight (kg) of activated carbon fiber is in the range of 10 to 25% by weight / kg, preferably It is in the range of 15 to 25% by weight / kg, more preferably in the range of 20 to 25% by weight / kg. The reason why the amount of potassium iodide or potassium iodate added is in the above range is the same as that of the mask 10A of FIG. In the iodine collection sheet | seat 20, while radioactive organic iodine and gaseous radioactive cesium are collected by the micropore of activated carbon fiber, radioactive organic iodine and gaseous state are added to potassium iodide and potassium iodate adhering to activated carbon fiber. Of radioactive cesium is adsorbed.

When potassium iodide or potassium iodate is used as the adsorbent, the radioactive organic iodine removal efficiency of the iodine collection sheet 20 at an air humidity of 95% is in the range of 85 to 90%. When triethylenediamine C6H12N2 is used as the adsorbent, the radioactive organic iodine collection efficiency of the iodine collection sheet 20 at an air humidity of 95% is 95% or more, preferably 97% or more, more preferably 99.999%. That's it. The radioactive organic iodine collection efficiency of the iodine collection sheet 20 of the mask 10D is determined based on the measurement result using the test apparatus shown in FIG. 5 in the same manner as the iodine collection sheet 20 of the mask 10A of FIG. It was.

In the disposable mask 10D, a plurality of activated carbon fibers that form the iodine collection sheet 20 collect radioactive organic iodine, and the adsorbent adhering to the activated carbon fibers adsorbs radioactive organic iodine and gaseous radioactive cesium. Even if radioactive organic iodine or gaseous radioactive cesium is contained in the air, the radioactive organic iodine or radioactive cesium is reliably collected and adsorbed on the mask 10D, and the radioactive organic iodine or radioactive cesium passes through. In addition, it is possible to prevent radioactive organic iodine and radioactive cesium from entering the body of the wearer 40 wearing the mask 10D.

The disposable mask 10D is a disposable mask that is immediately discarded after it has collected and adsorbed radioactive organic iodine and gaseous radioactive cesium at a predetermined concentration, and has been collected by activated carbon fibers and adsorbed by an adsorbent. Organic iodine and radioactive cesium are not released again from the activated carbon fiber and the adsorbent, and it is possible to prevent the diffusion of radioactive organic iodine and radioactive cesium from the mask 10D to other places, and to the discarded mask 10D. The half-life can be safely reached while iodine is collected and adsorbed.

The disposable mask 10D not only collects and adsorbs radioactive organic iodine and gaseous radioactive cesium, but also has a normal mask function. The first and second foreign matter removing sheets 10 and 21 allow dust and pollen, Since foreign substances such as germs and viruses are collected, it is possible to prevent dust and pollen from adhering to the iodine collection sheet 20 and to prevent the entry of these foreign substances into the body of the wearer 40 wearing the mask 10A. be able to. The thermoplastic synthetic resin fibers that form the first and second foreign

matter removal sheets

19 and 21 are electretized, and dust and pollen that have entered the foreign

matter removal sheets

19 and 21 due to the electrostatic action of the foreign

matter removal sheets

19 and 21. Is efficiently collected by the foreign

matter removal sheets

In the disposable mask 10D, since the first and second foreign

matter removal sheets

In the disposable mask 10D, since the first and second foreign matter removing sheets 10 and 21 contain a plurality of antibacterial fibers, various germs and viruses contained in the air passing through the foreign

matter removing sheets

19 and 21 are caused by the antibacterial fibers. It can be sterilized or sterilized to prevent entry of germs and viruses into the wearer's 40 body. In addition, since germs and viruses contained in the breath of the wearer 40 are sterilized or sterilized by the antibacterial fibers, it is possible to prevent germs and viruses from being released to the outside of the mask 10D.

In the disposable mask 10D, the surface speed of the second foreign matter removing sheet 21 is smaller than that of the first foreign matter removing sheet 19 and the iodine collecting sheet 20, and the wearer 40 sucks air or blows out air. Then, the flow of air in the mask 10D is suppressed by the second foreign matter removal sheet 21, and the sucked-in air or the blown-out air flows uniformly throughout the iodine collection sheet 20, so that a part of the iodine collection sheet 20 can be quickly passed. Since it does not pass through and air does not pass through a part of the first foreign matter removing sheet 19 quickly, radioactive iodine and gaseous radioactive cesium are reliably collected and adsorbed on the iodine collecting sheet 20. The moisture contained in the air can be reliably absorbed by the first and second foreign

matter removal sheets

19 and 21.

25 is a perspective view of a disposable mask 10E shown as another example, and FIG. 26 is an end view taken along the line FF of FIG. FIG. 27 is an end view taken along the line GG of FIG. In FIG. 25, the vertical direction is indicated by an arrow L, and the horizontal direction is indicated by an arrow M. The disposable mask 10E includes a filter member 11 that covers the entire mouth and nostril of the wearer 40 (referring to FIG. 12), and an ear hooking member 12 (a mounting member) that is worn on both ears of the wearer 40. The filter member 11 has an upper end portion 15 and a lower end portion 16 that extend in the horizontal direction, and both side portions 18 that extend in the vertical direction. Both side portions 18 of the filter member 11 are folded back inward in the horizontal direction, and are heat-sealed (fixed) by a heat-sealing line extending in the vertical direction in the form of a line or a dot (ultrasonic sealing or heat sealing). The filter member 11 is formed of a foreign matter removal bag 41 and an iodine collection sheet 20.

The ear hooking member 12 is made of a stretchable rubber cord or cloth cord, and a first ear hooking member 12A that is hung on the wearer's 40 left ear and a second ear hooking member 12B that is hung on the wearer's 40 right ear. Formed from. The first and second ear hooking members 12 A and 12 B are connected to both side portions 18 of the filter member 11. The first end hook member 12 A is supported by a side portion 18 whose connection end portion 14 is folded back inward in the lateral direction of the filter member 11. The second end hook member 12 B is supported by a side portion 18 whose connecting end portion 14 is folded back inward in the lateral direction of the filter member 11.

The foreign matter removing bag 41 has a first portion 41a located on the skin side of the wearer 40 and a second portion 41b located on the outside of the iodine collection sheet 20 (non-skin side of the wearer 40). The first portion 41a and the second portion 41b are substantially the same shape and size, and are formed into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. In the foreign matter removing bag 41, the first and

second portions

41a and 41b are folded so as to overlap each other, and both side edges of the

portions

41a and 41b are heated by a heat-sealing line extending in the shape of a line or dot in the lateral direction. They are fused (fixed), and the lower ends of the

portions

41a and 41b are heat-sealed (fixed) by a heat-sealing line extending linearly or dottedly (ultrasonic sealing or heat sealing).

The iodine collection sheet 20 is slightly smaller than the first and

second portions

41a and 41b of the foreign matter removal bag 41, and is formed into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness dimension. The iodine collection sheet 20 is housed in the foreign matter removal bag 41, and its upper and lower edges and both side edges are not exposed to the outside from the foreign matter removal bag 41, and the whole is covered by the foreign matter removal bag 41. Yes. The entire area of the skin facing surface of the iodine collection sheet 20 is covered with the first portion 41 a of the foreign matter removal bag 41, and the whole area of the non-skin facing surface is covered with the second portion 41 b of the foreign matter removal bag 41. The iodine collection sheet 20 is not fixed to the foreign matter removal bag 41 and can float inside the foreign matter removal bag 41.

In order to wear this disposable mask 10E, the free parts 13 of the

ear hooking members

12A and 12B are hung on both ears of the wearer 40 (with assistance of FIG. 13). When the wearer 40 wears the mask 10E, the upper and

lower end portions

ear hooking members

12A and 12B come into contact with the face of the wearer 40, and the filter member 11 Covers the mouth and nostrils of the wearer 40. In the disposable mask 10E, the mask 10E is fixed to the face of the wearer 40 by hanging the free part 13 of the first ear hooking member 12A on the right ear and the free part 13 of the second ear hooking member 12B on the left ear. Inadvertent displacement and dropping of the mask 10E from the face of the wearer 40 are prevented.

The foreign matter removing bag 41 is a breathable sheet-like fiber nonwoven fabric made from a plurality of thermoplastic synthetic resin fibers. In addition, as the foreign material removal bag 41, a fiber nonwoven fabric having air permeability made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers, and a plurality of antibacterial fibers can be used, or a plurality of A breathable fiber nonwoven fabric made from thermoplastic synthetic resin fibers and a plurality of water-absorbing fibers can be used. When the foreign matter removal bag 41 is a fiber nonwoven fabric containing water absorbent fibers, the ratio (ratio) of the water absorbent fibers to the total weight of the foreign matter removal bag 41 is in the range of 10 to 20% by weight, preferably 15 to 20% by weight. It is in the range. When the foreign matter removing bag 41 is a fiber nonwoven fabric containing antibacterial fibers, the ratio (ratio) of the antibacterial fibers to the total weight of the foreign matter removing bag 41 is in the range of 5 to 10% by weight, preferably 7 to 8%. It is in the range of weight percent.

The average fiber diameter of the thermoplastic synthetic resin fibers for forming the foreign matter removal bag 41 is in the range of 0.5 to 50 μm, preferably in the range of 3 to 30 μm, more preferably in the range of 5 to 20 μm. The basis weight of the foreign matter removal bag 41 is in the range of 1.5 to 100 g / m ² , preferably in the range of 5 to 80 g / m ² , and more preferably in the range of 10 to 60 g / m ² . The thickness dimension of the foreign matter removal bag 41 is in the range of 0.2 to 3 mm, preferably in the range of 1 to 2 mm. The surface speed of the foreign matter removing bag 41 is in the range of 8 to 16 cm / sec. If the surface speed of the foreign material removal bag 41 is less than 8 cm / sec, the air permeability in the foreign material removal bag 41 is low, the air permeability of the mask 10E is lowered, and the smooth breathing of the wearer 40 wearing the mask 10E may be harmed. is there.

The manufacturing method of these fiber nonwoven fabrics forming the foreign matter removal bag 41 is the same as that of the fiber nonwoven fabrics forming the foreign

material removal sheets

19 and 21 of the mask 10A of FIG. The foreign

material removal sheets

19 and 21 are the same as those of the nonwoven fabrics. The water absorbing fiber is the same as that used for the first foreign matter removing sheet 19 of the mask 10A of FIG. 1, and the antibacterial fiber is the same as that used for the second foreign matter removing sheet 21 of the mask 10A of FIG. Are identical. In the foreign matter removal bag 41, the thermoplastic synthetic resin fibers that make them are electretized.

The iodine collection sheet 20 is a non-woven fabric having air permeability made of a plurality of activated carbon fibers having a high specific surface area and a large number of fine pores and collecting radioactive organic iodine and gaseous radioactive cesium. in use. The iodine collection sheet 20 may be a woven fabric or a knitted fabric made from a plurality of activated carbon fibers. The average fiber diameter of the activated carbon fiber forming the iodine collection sheet 20 is in the range of 5 to 20 μm, preferably in the range of 7 to 18 μm, more preferably in the range of 10 to 16 μm. The basis weight of the iodine collection sheet 20 is in the range of 50 to 200 g / m ² , preferably in the range of 70 to 180 g / m ² , more preferably in the range of 80 to 150 g / m ² . The thickness of the iodine collecting sheet 20 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10E is lowered, and the smooth breathing of the wearer 40 wearing the mask 10E may be impaired. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

When potassium iodide or potassium iodate is used as the adsorbent, the amount of potassium iodide and potassium iodate added per unit weight (kg) of activated carbon fiber is in the range of 10 to 25% by weight / kg, preferably It is in the range of 15 to 25% by weight / kg, more preferably in the range of 20 to 25% by weight / kg. In the iodine collection sheet 20, radioactive organic iodine is collected in activated carbon fibers or gaseous radioactive cesium micropores, and the radioactive organic iodine or gaseous substances are added to potassium iodide or potassium iodate attached to the activated carbon fibers. Of radioactive cesium is adsorbed.

When triethylenediamine C6H12N2 is used as the adsorbent, the amount of triethylenediamine C6H12N2 applied to the unit weight (kg) of activated carbon fiber is in the range of 10 to 20% by weight / kg, preferably in the range of 12 to 18% by weight. Preferably, it is in the range of 13 to 16% by weight. In the iodine collection sheet 20, radioactive organic iodine is collected in activated carbon fibers or gaseous radioactive cesium micropores, and triethylenediamine C6H12N2 attached to the activated carbon fibers contains radioactive organic iodine or gaseous radioactive cesium. Adsorb.

In the disposable mask 10E, the activated carbon fibers that form the iodine collection sheet 20 collect radioactive organic iodine and gaseous radioactive cesium, and the adsorbent adhering to the activated carbon fibers is radioactive organic iodine or gaseous. Since radioactive cesium is adsorbed, even if radioactive organic iodine or radioactive cesium is contained in the air, radioactive organic iodine or radioactive cesium is reliably collected and adsorbed by the mask 10E, and the radioactive organic iodine or radioactive cesium passes through. It does not do, and it can prevent the entrance of radioactive organic iodine or radioactive cesium into the body of the wearer 40 wearing the mask 10E.

The disposable mask 10E is a disposable that is immediately discarded after it has collected and adsorbed radioactive organic iodine and gaseous radioactive cesium at a predetermined concentration, and has been collected by activated carbon fibers and adsorbed by an adsorbent. Organic iodine and radioactive cesium are not released again from the activated carbon fiber or the adsorbent, so that the diffusion of radioactive organic iodine or radioactive cesium from the mask 10E to other places can be prevented, and the discarded mask 10E has a radioactive organic content. The half-life can be safely reached while iodine is collected and adsorbed.

The disposable mask 10E not only collects and adsorbs radioactive organic iodine and gaseous radioactive cesium, but also has a normal mask function. The foreign substance removal bag 41 collects foreign substances such as dust, pollen, germs, and viruses. Thus, dust and pollen can be prevented from adhering to the iodine collection sheet 20, and entry of these foreign matters into the body of the wearer 40 wearing the mask 10E can be prevented. The thermoplastic synthetic resin fibers that make up the foreign matter removal bag 41 are electretized, and dust and pollen that have entered the foreign matter removal bag 41 by the electrostatic action of the foreign matter removal bag 41 are efficiently collected in the foreign matter removal bag 41. In addition, it is possible to reliably prevent dust and pollen from adhering to the iodine collection sheet 20, and to reliably prevent dust and pollen from entering the body of the wearer 40.

In the disposable mask 10E, when the foreign matter removal bag 41 contains a plurality of water absorbent fibers, moisture contained in the air passing through the foreign matter removal bag 41 and moisture contained in the breath of the wearer 40 are absorbed by the water absorbent fibers. The activated carbon fiber that makes the collection sheet 20 can be kept dry, and the adsorbent adhering to the activated carbon fiber is detached from the activated carbon fiber due to moisture in the air or moisture contained in the breath of the wearer 40. The surface of the activated carbon fiber is not wetted by moisture, and it is possible to prevent a decrease in the collection function of the activated carbon fiber with respect to the radioactive organic iodine, and to reduce the adsorption function of the adsorbent with respect to the radioactive organic iodine. Can be prevented.

When the foreign substance removal bag 41 contains a plurality of antibacterial fibers, the disposable mask 10E is sterilized or sterilized by the antibacterial fibers and germs and viruses contained in the air passing through the foreign substance removal bag 41. It can prevent bacteria and viruses from entering the body. In addition, since germs and viruses contained in the breath of the wearer 40 are sterilized or sterilized by the antibacterial fibers, it is possible to prevent germs and viruses from being released to the outside of the mask 10E.

28 is an end view similar to FIG. 26 of the mask 10E using the iodine collection sheet 20 of FIG. 16, and FIG. 29 is similar to FIG. 27 of the mask 10E using the iodine collection sheet 20 of FIG. FIG. The iodine collection sheet | seat 20 is a fiber nonwoven fabric which has the air permeability made from the several activated carbon fiber which collects a radioactive organic iodine and gaseous radioactive cesium, and is shape | molded by the substantially rectangular sheet shape long in a horizontal direction. Furthermore, it is folded in an orderly manner in a zigzag so as to repeat undulations in the lateral direction (folded). The iodine collection sheet 20 has a plurality of peak portions 30 and a plurality of valley portions 31 that extend in the vertical direction and are arranged at substantially equal intervals in the horizontal direction. The above-mentioned adsorbent is attached to the activated carbon fiber that forms the iodine collection sheet 20.

The number of times the iodine collecting sheet 20 is bent in the lateral direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times, with respect to 1 cm in the lateral length of the sheet 20. The height dimension of the iodine collection sheet 20 from the crest 30 to the trough 31 is in the range of 0.5 to 3 mm. Note that the basis weight, thickness dimension, and surface speed of the iodine collection sheet 20 before bending are the same as those of the iodine collection sheet 20 used in the disposable mask 10E of FIG. Further, the iodine collection sheet 20 is folded (folded) in a zigzag manner so as to repeat ups and downs in the vertical direction, extends in the horizontal direction and is arranged at equal intervals in the vertical direction, and a plurality of valleys 31. It may have. In this case, the number of times of folding in the vertical direction is in the range of 10 to 40 times, preferably in the range of 20 to 30 times, with respect to 1 cm of the longitudinal length of the sheet 20.

The iodine collection sheet 20 is housed inside the foreign matter removal bag 41, and its upper and lower edges and both side edges are not exposed to the outside from the foreign matter removal bag 41, and the whole is covered by the foreign matter removal bag 41. Yes. The entire area of the skin facing surface of the iodine collection sheet 20 is covered with the first portion 41 a of the foreign matter removal bag 41, and the whole area of the non-skin facing surface is covered with the second portion 41 b of the foreign matter removal bag 41. The iodine collection sheet 20 is not fixed to the foreign matter removal bag 41 and can float inside the foreign matter removal bag 41.

This iodine collection sheet 20 is folded in the transverse direction (or longitudinal direction) with the number of foldings within the above range, so that the surface area of the sheet 20 is compared to the unfolded (unfolded) sheet 20. As a result, the amount of air in contact with the activated carbon fiber increases, and the function of collecting and adsorbing radioactive organic iodine can be improved. As a result, the function of collecting and adsorbing radioactive organic iodine in the mask 10E can be improved, and the radioactive organic iodine can be reliably collected and adsorbed on the mask 10E.

In the mask 10E using the iodine collection sheet 20 of FIGS. 28 and 29, the iodine collection sheet 20 can be folded to be able to increase the volume of the iodine collection sheet 20 as compared with the unfolded iodine collection sheet 20. Therefore, since the basis weight and surface area of the iodine collection sheet 20 can be increased, radioactive organic iodine and gaseous radioactive cesium can be reliably collected on the plurality of activated carbon fibers that form the iodine collection sheet 20. In addition, radioactive organic iodine and gaseous radioactive cesium can be reliably adsorbed to the adsorbent adhering to these activated carbon fibers. Even if the mask 10E contains radioactive organic iodine or gaseous radioactive cesium in the air, the radioactive organic iodine or radioactive cesium is reliably collected and adsorbed by the mask 10E, and the radioactive organic iodine or radioactive cesium passes through. There is no need to prevent the radioactive organic iodine or radioactive cesium from entering the body of the wearer 40 wearing the mask 10E.

30 is a front perspective view of a disposable mask 10F shown as another example, and FIG. 31 is a rear perspective view of the disposable mask 10F of FIG. 32 is a perspective view of the mask 10F shown in a worn state, and FIG. 33 is an end view taken along the line HH in FIG. 34 is an end view taken along the line II of FIG. In FIG. 30, the vertical direction is indicated by an arrow L, and the horizontal direction is indicated by an arrow M. The disposable mask 10 F includes a filter member 11 that covers the entire mouth and nostril of the wearer 40, and a mounting member 12 that is hung on the wearer's 40 head. When the wearer 40 wears the mask 10 A, the filter member 11 is formed into a three-dimensional shape (three-dimensional structure) that protrudes forward from the face of the wearer 40.

The filter member 11 has an upper end portion 15 and a lower end portion 16 extending in the horizontal direction, and outer end portions (both side portions) 18 extending in the vertical direction. The filter member 11 includes a first foreign matter removal sheet 19 (skin contact sheet) located on the skin side of the wearer 40, an iodine collection sheet 20 located on the outside of the first foreign matter removal sheet 19, and an iodine catch. One is formed from a second foreign matter removal sheet 21 (non-skin contact sheet) located on the outside of the collection sheet 20 (non-skin side of the wearer 40).

The mounting member 12 is made of an elastic rubber string that is stretchable. The first mounting member 12A is hung on the wearer's 40 head. The mounting member 12 is positioned below the first mounting member 12A and hung on the wearer's 40 head. The second mounting member 12B is formed. The connection end portions 14 of the first and second mounting members 12 A and 12 B are connected to the second foreign matter removal sheet 21. The connection end portions 14 of the first and second mounting

members

12A and 12B overlap the skin non-facing surface of the second foreign matter removal sheet 21, and are thermally fused (fixed) to the sheet 21 via the thermal fusion portion. (Ultrasonic seal or heat seal).

The first foreign matter removing sheet 19 is molded (three-dimensionally cut) into a sheet having a predetermined area and a predetermined thickness. A cutting line (not shown) extending from the lateral center of the lower end portion toward the central portion of the sheet 19 extends from the lateral center of the lower end portion of the first foreign matter removing sheet 19. The iodine collection sheet 20 is substantially the same shape and size as the first foreign matter removal sheet 19 and the second foreign matter removal sheet 21, and is molded into a substantially rectangular sheet shape having a predetermined area and a predetermined thickness (three-dimensional). Cutting). A cutting line (not shown) extending from the lateral center of the lower end portion toward the central portion of the sheet 20 extends from the lateral center of the lower end portion of the iodine collecting sheet 20. The second foreign matter removal sheet 21 is substantially the same shape and size as the first foreign matter removal sheet 19 and is molded (three-dimensionally cut) into a sheet shape having a predetermined area and a predetermined thickness. A cutting line (not shown) extending from the lateral center of the lower end portion toward the central portion of the sheet 21 extends from the lateral center of the lower end portion of the second foreign matter removing sheet 21.

The first foreign matter removing sheet 19, the iodine collecting sheet 20 and the second foreign matter removing sheet 21 are overlapped at the upper ends (upper end portions 15) of the sheets 19 to 21, and the upper end portions of the sheets 19 to 21 are lateral. The sheets 19 to 21 are heat-sealed (fixed) by the heat-sealing portions 42 extending linearly or in the direction, the lower ends (lower end portions 16) of the sheets 19 to 21 are overlapped, and the lower ends of the sheets 19 to 21 are laterally It is heat-sealed (fixed) by a heat-sealing portion 42 that extends in the form of a helix or dot. The first foreign matter removing sheet 19, the iodine collecting sheet 20, and the second foreign matter removing sheet 21 are overlapped at the outer ends (outer end portions 18) of the sheets 19 to 21, and the outer ends of the sheets 19 to 21 are overlapped. The portions are heat-sealed (fixed) by the heat-sealing portion 42 extending in the longitudinal direction in the form of lines or dots, and the vicinity of the cutting lines of these sheets 19 to 21 are overlapped, and the vicinity of the cutting lines of these sheets 19 to 21 is the vertical direction It is heat-sealed (fixed) by a heat-sealing portion 42 that extends in the form of a helix or dot. The sheets 19 to 21 are fused by ultrasonic sealing or heat sealing.

In order to wear this disposable mask 10F, the free parts 13 of the

ear hooking members

12A and 12B are hung on the head of the wearer 40 (see FIG. 32). When the wearer 40 wears the mask 10F, the upper and lower ends 15, 16 and the outer end 18 of the filter member 11 come into contact with the face of the wearer 40, and the first and second mounting

members

12A, 12B are worn by the wearer 40. The filter member 11 covers the entire mouth and nostrils of the wearer 40. In the disposable mask 10F, the mask 10F is fixed to the face of the wearer 40 by hanging the free portions 13 of the first and second mounting

members

12A and 12B on the head, and the mask 10F is not attached to the face of the wearer 40. Prepared for shifting and dropping.

The wearer 40 enters the work space of a nuclear facility or medical facility where radioactive organic iodine (iodine gas) may be generated while wearing the mask 10F, and performs work. In addition, when radioactive organic iodine or gaseous radioactive cesium is released to the atmosphere due to an accident, a resident (wearer 40) in a region that may be contaminated by the radioactive organic iodine or radioactive cesium wears the mask 10F, Wait for the half-life of radioactive organic iodine while living in the area.

The first foreign matter removing sheet 19 is formed of breathable fiber nonwoven fabrics 19a to 19d made of a plurality of thermoplastic synthetic resin fibers. In the 1st foreign material removal sheet 19, it is located in order of the fiber nonwoven fabric 19a-> fiber nonwoven fabric 19b-> fiber nonwoven fabric 19c-> fiber nonwoven fabric 19d toward the iodine collection sheet | seat 20 from the skin side of the wearer 40. These fiber nonwoven fabrics have their skin facing surface and non-skin facing surface overlap each other. The surfaces of these fiber nonwoven fabrics are not fixed to each other. For the fiber nonwoven fabric 19b, a breathable fiber nonwoven fabric made of a plurality of thermoplastic synthetic resin fibers, a plurality of water absorbent fibers and a plurality of antibacterial fibers can be used, or a plurality of thermoplastic synthetic materials can be used. Breathable fiber nonwoven fabric made from resin fibers and a plurality of water absorbent fibers can be used, or breathable fiber made from a plurality of thermoplastic synthetic resin fibers and a plurality of antibacterial fibers Nonwoven fabrics can be used. In the fiber nonwoven fabric 19c and the fiber nonwoven fabric 19d, thermoplastic synthetic resin fibers that form them are electretized.

The production method of the fiber nonwoven fabrics 19a to 19d forming the first foreign material removal sheet 19 is the same as that of the fiber nonwoven fabrics forming the first foreign material removal sheet 19 of the mask 10A of FIG. These are the same as those of the nonwoven fabrics forming the first foreign matter removing sheet 19 of the mask 10A of FIG. The water absorbing fiber is the same as that used for the first foreign matter removing sheet 19 of the mask 10A of FIG. 1, and the antibacterial fiber is the same as that used for the second foreign matter removing sheet 21 of the mask 10A of FIG. Are identical.

When the fiber nonwoven fabric 19b contains water absorbent fibers, the ratio (ratio) of the water absorbent fibers to the total weight of the fiber nonwoven fabric 19b is in the range of 10 to 20% by weight, preferably in the range of 15 to 20% by weight. The reason why the ratio of the water-absorbing fibers is within the above range is the same as that of the mask 10A in FIG. The first foreign matter removing sheet 19 has an excellent moisture (moisture) absorption function because the fiber nonwoven fabric 19b contains water-absorbing fibers in addition to the thermoplastic synthetic resin fibers in the above ratio. When the fiber nonwoven fabric 19b contains antibacterial fibers, the ratio (ratio) of the antibacterial fibers to the total weight of the fiber nonwoven fabric 19b is in the range of 5 to 10% by weight, preferably in the range of 7 to 8% by weight. . The reason why the ratio of the antibacterial fibers is within the above range is the same as that of the mask 10A in FIG. The first foreign matter removing sheet 19 has an excellent antibacterial action and antiviral action since the fiber nonwoven fabric 19b contains antibacterial fibers in addition to the thermoplastic synthetic resin fibers in the above ratio.

The average fiber diameter of the thermoplastic synthetic resin fibers for producing the fiber nonwoven fabrics 19a to 19d is in the range of 3 to 50 μm, preferably in the range of 10 to 50 μm, more preferably in the range of 20 to 50 μm. The basis weight of the fiber nonwoven fabrics 19a to 19d is in the range of 1.5 to 50 g / m ² , preferably in the range of 1.5 to 30 g / m ² , more preferably in the range of 1.5 to 20 g / m ^2. . The basis weight of the fiber nonwoven fabric 19b is larger than that of the

fiber nonwoven fabrics

19a, 19c, 19d. The thickness dimension of the fiber nonwoven fabrics 19a to 19d is in the range of 0.2 to 3 mm, preferably in the range of 0.2 to 2 mm, and more preferably in the range of 0.2 to 1 mm. The thickness dimension of the fiber nonwoven fabric 19b is larger than that of the

fiber nonwoven fabrics

19a, 19c, 19d.

The surface speed of the first foreign matter removing sheet 19 is in the range of 10 to 16 cm / sec. When the surface speed of the first foreign matter removing sheet 19 is less than 10 cm / sec, the air permeability in the foreign matter removing sheet 19 is low, the air permeability of the mask 10F is lowered, and the smooth breathing of the wearer 40 wearing the mask 10F is harmed. May be. If the surface speed exceeds 16 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the foreign matter removal sheet 19 becomes higher than necessary, and the foreign matter removal sheet 10 is sufficiently trapped. In some cases, the foreign substance removal sheet 10 cannot absorb moisture (moisture).

The second foreign matter removing sheet 21 is made of an air permeable nonwoven fabric made from a plurality of thermoplastic synthetic resin fibers. The manufacturing method of those fiber nonwoven fabrics forming the second foreign material removal sheet 21 is the same as that of those fiber nonwoven fabrics forming the first foreign material removal sheet 19 of the mask 10A of FIG. It is the same as that of those fiber nonwoven fabrics which form the 1st foreign material removal sheet 19 of 1 mask 10A.

The average fiber diameter of the thermoplastic synthetic resin fiber forming the second foreign matter removing sheet 21 is in the range of 0.5 to 30 μm, preferably 0.5 to 15 μm, more preferably 0.5 to 10 μm. The basis weight of the second foreign matter removing sheet 21 is in the range of 10 to 100 g / m ² , preferably in the range of 30 to 100 g / m ² , and more preferably in the range of 50 to 100 g / m ² . The thickness of the second foreign matter removing sheet 21 is in the range of 0.5 to 3 mm, preferably in the range of 1 to 3 mm, and more preferably in the range of 2 to 3 mm.

The surface speed of the second foreign material removal sheet 21 is in the range of 8 to 12 cm / sec. When the surface speed of the second foreign matter removing sheet 21 is less than 8 cm / sec, the air permeability in the foreign matter removing sheet 21 is low, the air permeability of the mask 10F is lowered, and the smooth breathing of the wearer 40 wearing the mask 10F is harmed. May be. If the surface speed exceeds 12 cm / sec, the speed of the air passing through the foreign material removal sheet 21 becomes higher than necessary when the wearer 40 breathes in air, and the foreign material removal sheet 21 has dust, pollen, etc. There are cases where foreign matter cannot be adsorbed.

The iodine collection sheet 20 has a high specific surface area and a large number of fine pores, and has a breathable fiber nonwoven fabric made of a plurality of activated carbon fibers that collect radioactive organic iodine and gaseous radioactive cesium, Breathable fabrics made from activated carbon fibers and knitted fabrics made from activated carbon fibers and breathable are used. The manufacturing method of these fiber nonwoven fabrics which form the iodine collection sheet | seat 20 is the same as that of the fiber nonwoven fabric which forms the 1st foreign material removal sheet 19 of the mask 10A of FIG.

The surface speed of the iodine collecting sheet 20 is in the range of 12 to 20 cm / sec, preferably in the range of 15 to 20 cm / sec. If the surface speed is less than 12 cm / sec, the air permeability in the iodine collection sheet 20 is low, the air permeability of the mask 10F is lowered, and the smooth breathing of the wearer 40 wearing the mask 10F may be harmed. When the surface speed exceeds 20 cm / sec, when air is sucked by the breathing of the wearer 40, the speed of the air passing through the iodine collection sheet 20 becomes higher than necessary, and the radioactive organic iodine is added to the iodine collection sheet 20. May not be collected and adsorbed.

When potassium iodide or potassium iodate is used as the adsorbent, the radioactive organic iodine removal efficiency of the iodine collection sheet 20 at an air humidity of 95% is in the range of 85 to 90%. When triethylenediamine C6H12N2 is used as the adsorbent, the radioactive organic iodine collection efficiency of the iodine collection sheet 20 at an air humidity of 95% is 95% or more, preferably 97% or more, more preferably 99.999%. That's it. The radioactive organic iodine collection efficiency of the iodine collection sheet 20 of the mask 10F is determined based on the measurement result using the test apparatus shown in FIG. 5 in the same manner as the iodine collection sheet 20 of the mask 10A of FIG. It was.

In the heat fusion part 42 in the mask 10F, the fiber nonwoven fabric (thermoplastic synthetic resin fiber) forming the second foreign matter removal sheet 21 is melted by ultrasonic sealing or heat sealing, and the melted fiber nonwoven fabric is the iodine collection sheet 20. It flows into the fiber gaps of the activated carbon fibers forming the. Furthermore, the fiber nonwoven fabrics 19a to 19d (thermoplastic synthetic resin fibers) forming the first foreign matter removal sheet 19 are melted by ultrasonic sealing or heat sealing, and the activated fiber nonwoven fabric forms the iodine collection sheet 20 by the melted fiber nonwoven fabric. It flows into the fiber gap of the fiber. In addition, the iodine collection sheet | seat 20 made from activated carbon fiber is not fuse | melted in the heat-fusion part 42, but is maintaining the fiber form.

In the heat-sealing part 42, the fiber nonwoven fabric (sheet 21) which flows (enters) into the fiber gaps of the activated carbon fibers is cured, whereby the fiber nonwoven fabric is caught by the activated carbon fibers, and the sheet 20 is caused by the anchor effect of the melted fiber nonwoven fabric. And the sheet 21 are fixed, and the fiber nonwoven fabrics 19a to 19d (sheet 19) flowing (entering) into the fiber gaps of the activated carbon fibers are cured, so that the fiber nonwoven fabrics 19a to 19d are caught by the activated carbon fibers and melted. The sheet 19 and the sheet 20 are fixed by the anchor effect of the nonwoven fabrics 19a to 19d. Furthermore, the fiber nonwoven fabric (sheet 21) and the fiber nonwoven fabrics 19a to 19d that have flowed into (entered) into the fiber gap of the activated carbon fiber during ultrasonic sealing or heat sealing are connected in the fiber gap, and the sheet 19 and the sheet 21 are fixed. As a result, the sheet 20 sandwiched between the sheet 19 and the sheet 21 is fixed to the

sheets

19 and 21. In the mask 10F, the iodine collection sheet 20 does not exhibit fluidity by ultrasonic sealing or heat sealing, but the sheet 20 is moved between the sheet 19 and the sheet 21 by the molten fiber nonwoven fabric (sheet 21) or the fiber nonwoven fabrics 19a to 19d. Can be fixed.

In the disposable mask 10F, a plurality of activated carbon fibers making up the iodine collection sheet 20 collect radioactive organic iodine and gaseous radioactive cesium, and the adsorbent adhering to these activated carbon fibers is radioactive organic iodine or gaseous. Because radioactive cesium is adsorbed, even if radioactive organic iodine and radioactive cesium are contained in the air, radioactive organic iodine and radioactive cesium are reliably collected and adsorbed by the mask 10F, and the radioactive organic iodine and radioactive cesium pass through. It does not do, and it can prevent the entrance of radioactive organic iodine and radioactive cesium into the body of the wearer 40 wearing the mask 10F.

The disposable mask 10F is a disposable that is immediately discarded after it has collected and adsorbed radioactive organic iodine and gaseous radioactive cesium at a predetermined concentration, and has been collected by activated carbon fibers and adsorbed by an adsorbent. Organic iodine and radioactive cesium are not released again from the activated carbon fiber or the adsorbent, and it is possible to prevent the diffusion of radioactive organic iodine and radioactive cesium from the mask 10F to other places, and to the discarded mask 10F The half-life can be safely reached while iodine is collected and adsorbed.

The disposable mask 10F not only collects and adsorbs radioactive organic iodine and gaseous radioactive cesium, but also has a normal mask function, and the first and second foreign matter removing sheets 19 and 21 (especially the first Since foreign substances such as dust, pollen, germs, and viruses are collected by the electric fiber nonwoven fabric 19c and the fiber nonwoven fabric 19d) of the foreign matter removal sheet 19, it is possible to prevent the dust and pollen from adhering to the iodine collection sheet 20. At the same time, entry of these foreign substances into the body of the wearer 40 wearing the mask 10F can be reliably prevented.

When the disposable mask 10 F includes a water absorbent fiber in the nonwoven fabric of the first foreign material removal sheet 19, moisture contained in the breath of the wearer 40 passing through the foreign material removal sheet 19 is absorbed by the water absorbent fiber, and the collection sheet 20. The activated carbon fiber can be kept in a dry state, and the adsorbent adhering to the activated carbon fiber does not fall off the activated carbon fiber due to moisture contained in the breath of the wearer 40, and the activated carbon fiber is absorbed by moisture. As a result, it is possible to prevent a decrease in the function of collecting the activated carbon fiber with respect to the radioactive organic iodine and to prevent a decrease in the adsorption function of the adsorbent with respect to the radioactive organic iodine.

When the non-woven fabric of the first foreign matter removal sheet 19 contains antibacterial fibers, the disposable mask 10F is worn after germs and viruses contained in the air passing through the foreign matter removal sheet 19 are sterilized or sterilized by the antibacterial fibers. It is possible to prevent germs and viruses from entering the body of the person 40. Moreover, since germs and viruses contained in the breath of the wearer 40 are sterilized or sterilized by the antibacterial fiber, it is possible to prevent germs and viruses from being released to the outside of the mask 10F.

10A Disposable Mask

10B Disposable Mask

10C Disposable Mask

10D Disposable Mask

10E Disposable Mask

10F Disposable Mask 11 Filter Member 11A First Filter Member 11B Second Filter Member 12 Ear Hang Member (Mounting Member)
12A 1st ear hook member (mounting member)
12B Second ear hook member (mounting member)
13 Free part 14 Connecting part 15 Upper end part 16 Lower end part 17 Inner end part 18 Outer end part (both side parts)
19 1st foreign material removal sheet 19a 1st foreign material removal sheet (fiber nonwoven fabric)
19b 1st foreign material removal sheet (fiber nonwoven fabric)
20 iodine collection sheet 20a iodine collection sheet 20b iodine collection sheet 21 second foreign matter removal sheet 21a second foreign matter removal sheet (fiber nonwoven fabric)
21b 2nd foreign material removal sheet (fiber nonwoven fabric)
23 Lower end 24 Lower end 25 Outer end (both sides)
26 Outer end (both sides)
27 upper end portion 28 upper end portion 29 pocket 30 peak portion 31 valley portion 32 pad member 33 central portion 34 peripheral portion 35 peripheral portion 36 peripheral portion 40 wearer 41 foreign matter removing bag 41a first portion 41b second portion 42 heat fusion portion

Claims

In a disposable mask having a filter member covering the mouth and nose of the wearer, and a mounting member for fixing the filter member to the wearer's face,
The filter member is formed from at least one iodine collection sheet having a predetermined area that is made of a plurality of activated carbon fibers and collects radioactive organic iodine contained in air, and the iodine collection sheet has air permeability. A non-woven fabric, a woven fabric, and a knitted fabric, and the adsorbent that adsorbs the radioactive organic iodine is attached to the activated carbon fibers that form the iodine collection sheet. A disposable mask that can collect and adsorb iodine.
The filter member includes a first foreign matter removal sheet having a predetermined area located on the skin side of the wearer and overlapping the skin-facing surface of the iodine collection sheet, and the first foreign matter removal sheet includes a plurality of heats. 2. The radioactive organic iodine according to claim 1, wherein the radioactive organic iodine is a breathable fiber nonwoven fabric made of a plastic synthetic resin fiber, and the iodine collecting sheet is fixed to a non-skin facing surface of the first foreign matter removing sheet. A disposable mask that can collect and adsorb.
The filter member includes a second foreign matter removing sheet having a predetermined area that is positioned on the non-skin side of the wearer and overlaps the skin non-facing surface of the iodine collecting sheet, and a plurality of the second foreign matter removing sheets are provided. A non-woven fabric having air permeability made from the thermoplastic synthetic resin fiber, wherein the iodine collecting sheet is interposed between the first foreign matter removing sheet and the second foreign matter removing sheet, and these foreign matters The disposable mask which can collect and adsorb | suck the radioactive organic iodine of Claim 2 currently fixed to the skin opposing surface and non-skin opposing surface of a removal sheet.
The filter member is located on the skin side of the wearer and overlaps the skin-facing surface of the iodine collection sheet, and has a predetermined area, and the iodine is located on the non-skin side of the wearer. Including a second foreign matter removing sheet having a predetermined area that overlaps the skin non-facing surface of the collection sheet, and the foreign matter removing sheet is a fiber nonwoven fabric having air permeability made from a plurality of thermoplastic synthetic resin fibers, The radioactive organic iodine according to claim 1, wherein the iodine collecting sheet is removably accommodated in a pocket formed between the first foreign matter removing sheet and the second foreign matter removing sheet. Adsorbable disposable mask.
The filter member includes a foreign matter removal bag that covers the entire area of the skin-facing surface and the non-skin-facing surface of the iodine collection sheet, and the foreign matter removal bag is made of a plurality of thermoplastic synthetic resin fibers. A disposable mask capable of collecting and adsorbing radioactive organic iodine according to claim 1, wherein the iodine collection sheet is movably housed inside the foreign matter removal bag. .
The iodine collection sheet is folded in a zigzag manner so as to repeat ups and downs in either the horizontal direction or the vertical direction, and a plurality of peaks and valleys lined up in either the horizontal direction or the vertical direction A disposable mask capable of collecting and adsorbing the radioactive organic iodine according to any one of claims 1 to 5.
The iodine collection sheet is folded in a zigzag manner so as to repeat ups and downs in either the horizontal direction or the vertical direction, and is arranged in either the horizontal direction or the vertical direction. The disposable mask which can collect and adsorb | suck the radioactive organic iodine in any one of Claim 1 thru | or 5 currently formed from the at least 2 iodine collection sheet | seat which has these.
The average carbon diameter of the activated carbon fiber that forms the iodine collection sheet is in the range of 5 to 20 μm, and the basis weight of one piece of the iodine collection sheet is in the range of 50 to 200 g / m 2. The disposable mask capable of collecting and adsorbing radioactive organic iodine according to any one of claims 1 to 7, wherein the thickness dimension of one of the above is in the range of 0.5 to 3 mm.
At least one of the first foreign matter removal sheet and the second foreign matter removal sheet contains a plurality of water absorbent fibers, and the ratio of the water absorbent fibers to the total weight of the foreign matter removal sheet is 10 to 20% by weight. A disposable mask capable of collecting and adsorbing the radioactive organic iodine according to any one of claims 3 to 8, which is in the range.
At least one of the first foreign matter removal sheet and the second foreign matter removal sheet is made of a plurality of water absorbent fibers and overlaps at least one of the skin facing surface and the non-skin facing surface of the foreign matter removing sheet. The disposable mask which can collect and adsorb | suck the radioactive organic iodine in any one of Claim 3 thru | or 8 containing a nonwoven fabric.
At least one of the first foreign matter removal sheet and the second foreign matter removal sheet contains a plurality of antibacterial fibers, and the ratio of the antibacterial fibers to the total weight of the foreign matter removal sheet is 5 to 10% by weight. The disposable mask which can collect and adsorb | suck the radioactive organic iodine in any one of Claims 3 thru | or 10 in the range of these.
The at least one of the thermoplastic synthetic resin fiber which makes the said 1st foreign material removal sheet, and the thermoplastic synthetic resin fiber which makes the said 2nd foreign material removal sheet is electretized, Any of Claim 3 thru | or 11 A disposable mask capable of collecting and adsorbing the radioactive organic iodine.
The average fiber diameter of the thermoplastic synthetic resin fiber making the first foreign matter removal sheet is in the range of 3-50 μm, and the average fiber diameter of the thermoplastic synthetic resin fiber making the second foreign matter removal sheet is 0.5-30 μm. The basis weight of one sheet of the first foreign matter removal sheet is 1.5 to 50 g / m 2 , and the basis weight of one piece of the second foreign matter removal sheet is 10 to 100 g / m 2. The thickness of one sheet of the first foreign matter removing sheet is in the range of 0.2 to 3 mm, and the thickness of one piece of the second foreign matter removing sheet is in the range of 0.5 to 3 mm. A disposable mask capable of collecting and adsorbing the radioactive organic iodine according to any one of claims 3 to 12.
The adsorbent is at least one of potassium iodide and potassium iodate, and the amount of the potassium iodide and potassium iodate added per unit weight (kg) of the activated carbon fiber is 10 to 25 The radioactive organic iodine according to any one of claims 1 to 13, wherein the iodine collection sheet has a radioactive organic iodine removal efficiency in the range of 85% to 90% in a range of wt% / kg and a humidity of 95% of the air. A disposable mask that can collect and adsorb organic iodine.
The adsorbent is an amine, and the amount of the amine attached to the unit weight (kg) of the activated carbon fiber is in the range of 10 to 20% by weight / kg, and the iodine trapping at an air humidity of 95%. 15. The disposable mask capable of collecting and adsorbing radioactive organic iodine according to claim 1, wherein the collection sheet has a radioactive organic iodine collection efficiency of 95% or more.
The disposable mask capable of collecting and adsorbing radioactive organic iodine according to claim 15, wherein the amine is triethylenediamine C6H12N2.