TW202235275A - Hydrogen generation sheet, swaddle, packaging material, and method of manufacturing hydrogen generation sheet - Google Patents

Abstract

Provided is a readily usable hydrogen generation sheet, swaddle, packaging material, and method of manufacture a hydrogen generation sheet. The hydrogen generation sheet is composed of a base sheet and a resin mixed with magnesium-based hydride powder, and has a coating film that overlaps the base sheet. The coating film contains particles contained in the powder, and on the surface of the coating film, at least a portion of the particles contained in the powder protrudes from the resin. Hydrogen molecules generated by the reaction between water and the magnesium-based hydride are released from the surface of the coating film.

Description

Hydrogen generating sheet, diaper, packaging material, and method for producing hydrogen generating sheet

The present invention relates to a method for producing a hydrogen generating sheet, a diaper, a packaging material, and a hydrogen generating sheet.

Molecular hydrogen is known to have the effect of eliminating hydroxyl radicals generated in the body. Hereinafter referred to as hydrogen molecule hydrogen. Hydroxyl free radicals can cause cell damage, damage genes, etc., and become the cause of aging or disease. Therefore, by providing hydrogen in the body and eliminating hydroxyl radicals with hydrogen, health can be improved.

JP-A-2018-8841 discloses a hydrogen generating sheet that contains magnesium hydride (MgH ₂ ) and generates hydrogen through the reaction of MgH ₂ and water (H ₂ O). By wearing the hydrogen generating sheet on the skin and reacting with water from the skin to generate hydrogen, it is possible to provide hydrogen in the body from the skin to improve health.

[Problem to be solved by the invention]

The hydrogen generating sheet disclosed in Patent Document 1 uses paper in which MgH ₂ powder is mixed with fibers, or a bag made of cloth or paper containing MgH ₂ . In order to popularize the improvement of health by using hydrogen generating sheets, an easy-to-use hydrogen generating sheet and a technique for producing the same are desired.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hydrogen generating sheet, a diaper, a packaging material, and a method for producing a hydrogen generating sheet that are easy to use. [means used to solve a problem]

The hydrogen generating sheet of the present invention is formed of a base sheet and a resin mixed with magnesium-based hydride powder, and has a coating layered on the base sheet, the coating contains particles contained in the powder, and on the surface of the coating, the powder is covered A part of at least a part of the particles protrudes from the resin, and hydrogen molecules generated by the reaction of water and the magnesium-based hydride are released from the surface of the coating.

The hydrogen generating sheet of the present invention is characterized in that the film is composed of a plurality of laminated layers of resin mixed with the powder.

In the hydrogen generating sheet of the present invention, the aforementioned resin is an ultraviolet curable resin.

The diaper of the present invention is characterized in that the diaper worn on the body contains the hydrogen generating sheet of the present invention, and the surface of the film contained in the hydrogen generating sheet faces the surface of the body, or the surface of the hydrogen generating sheet faces the surface of the body. A sheet through which water passes is interposed between the generating sheets, and the hydrogen generating sheet is disposed.

The packaging material of the present invention is characterized in that the packaging material of the packaged article contains the hydrogen generating sheet of the present invention, and the surface of the film contained in the hydrogen generating sheet is opposite to the surface of the aforementioned article, or the surface of the aforementioned article and the aforementioned A sheet through which water passes is interposed between the hydrogen generating sheets, and the hydrogen generating sheets are disposed.

The method for producing a hydrogen generating sheet of the present invention is a method for producing a hydrogen generating sheet that generates molecular hydrogen through the reaction of water and a magnesium-based hydride. The powdered resin is used as a printing paste. When the resin is hardened, the particles contained in the powder are embedded in the resin, and the thickness is adjusted so that at least a part of the particles contained in the powder protrude from the resin, and the base It is characterized by performing screen printing on the sheet and hardening the aforementioned resin.

The method for producing a hydrogen generating sheet according to the present invention is characterized in that multiple layers of the resin mixed with the powder are formed by repeating screen printing of the resin mixed with the powder as a printing paste and hardening of the resin. Laminated film.

The method for producing a hydrogen generating sheet according to the present invention is characterized in that the resin is an ultraviolet curable resin, and the resin is cured by irradiating ultraviolet rays.

The method for producing a hydrogen generating sheet of the present invention is characterized in that an acidic substance is added to the aforementioned resin.

In one aspect of the present invention, the hydrogen generating sheet is composed of a coating film formed by mixing a resin of magnesium-based hydride powder, which is laminated on the base sheet. Particles contained in the magnesium-based hydride powder are stored in the film. On the surface of the coating, a part of some particles contained in the magnesium-based hydride powder protrudes from the resin. Particles of the magnesium-based hydride react with water from the protruding part of the resin to create voids inside the coating, allowing water to easily infiltrate into the coating. Therefore, hydrogen is easily generated.

In one aspect of the present invention, a resin mixed with magnesium-based hydride powder is used as a printing paste, and screen printing is performed on the base sheet, and a film overlapping the base sheet is formed by curing the resin. By manufacturing the hydrogen generating sheet by screen printing, the hydrogen generating sheet can be easily mass-produced.

In one aspect of the present invention, the film contained in the hydrogen generating sheet is composed of a plurality of laminated layers of resin mixed with magnesium-based hydride powder. The hydrogen generating sheet can generate a large amount of hydrogen by laminating layers of resin mixed with magnesium-based hydride powder.

In one aspect of the present invention, the resin constituting the film is an ultraviolet curable resin. By irradiating ultraviolet rays, the ultraviolet curable resin is instantly cured, and the thickness of the film can be accurately adjusted to the desired size. Moreover, the process of forming a film can be performed in a short time.

In one aspect of the present invention, the hydrogen generating sheet is used for diapers or masks. Hydrogen is generated by the reaction of water produced in the body with the magnesium-based hydride contained in the hydrogen generating sheet, and hydrogen is supplied to the body. Through the hydrogen supplied to the body, it can suppress rough skin or improve health for people wearing diapers or masks.

In one aspect of the present invention, the hydrogen generating sheet is used for a packaging material. In the case of packaging perishables with a packaging material, water generated from perishables reacts with magnesium-based hydride contained in the hydrogen generating sheet to generate hydrogen, and the hydrogen is supplied to perishables. Hydrogen maintains the freshness of fresh produce. When the fresh product is food, the umami component increases due to hydrogen, making it more delicious.

In one aspect of the present invention, an acidic substance such as citric acid or malic acid is added to the resin. If the coating contains acidic substances, the reaction between magnesium-based hydride and water is promoted through the acidic substances. [Efficacy of the invention]

The present invention achieves an excellent effect that hydrogen generating sheets and the like as a hydrogen generating source can be easily, safely and mass-produced and used.

[Form for carrying out the invention]

Hereinafter, the present invention will be specifically described based on the drawings showing the aforementioned embodiments. FIG. 1 is a perspective view showing a hydrogen generating sheet 1 . The hydrogen generating sheet 1 is formed including a base sheet 11 and a coating film 12 overlapping the base sheet 11 . The base sheet 11 is a sheet-shaped member. The base sheet 11 is a sheet made of resin, paper, cloth, or nonwoven fabric. The coating 12 is formed of a resin mixed with magnesium hydride (MgH ₂ ) powder. MgH2 is a type of magnesium _- based hydride. The resin constituting the film 12 is solid. As will be described later, the resin constituting the film 12 is preferably an ultraviolet curable resin. The coating film 12 covers a part of the base sheet 11 . A plurality of coating films 12 each covering a part of the base sheet 11 are formed on the base sheet 11 . In the example shown in FIG. 1 , the coating film 12 is circular in plan view, and a plurality of coating films 12 are arranged in a matrix on the base sheet 11 . The shape of the coating film 12 may be other than circular, and a plurality of coating films 12 may be arranged on the base sheet 11 in a pattern other than a matrix pattern. Alternatively, a single coating film 12 may be continuously formed on the base sheet 11 without arranging a plurality of coating films 12 .

FIG. 2 is a cross-sectional view of an example of the hydrogen generating sheet 1 . A coating film 12 is provided on one surface of the base sheet 11 . The coating 12 is formed of a resin 13 mixed with MgH ₂ powder. The MgH ₂ particles contained in the MgH ₂ powder are designated as symbol 14. MgH ₂ particles 14 are contained in the coating 12 . In the example shown in FIG. 2 , a plurality of MgH ₂ particles 14 are not arranged in the thickness direction of the coating 12 , but a single MgH ₂ particle 14 is arranged. On the surface of the coating 12 , at least some of the plurality of MgH ₂ particles 14 contained in the coating 12 protrude from the resin 13 . Therefore, the surface of the film 12 has unevenness. The thickness of the coating 12 is equal to or less than the diameter of the MgH ₂ particles 14 so that a part of the MgH ₂ particles 14 can protrude from the resin 13 on the surface of the coating 12 .

FIG. 3 is a cross-sectional view of another example of the hydrogen generating sheet 1 . In the example shown in FIG. 3 , the film 12 is composed of a plurality of laminated layers of resin 13 mixed with MgH ₂ powder. A plurality of MgH ₂ particles 14 exist in the thickness direction of the coating 12 . The thickness of each layer is such that a part of the MgH ₂ particles 14 contained in the MgH ₂ powder protrudes from the resin 13 . Parts of at least some of the plurality of MgH ₂ particles 14 protrude from the resin 13 on the surface of the coating 12 .

Hydrogen (H ₂ ) is generated from the hydrogen generating sheet 1 through the reaction of MgH ₂ contained in the hydrogen generating sheet 1 with water (H ₂ O). The reaction formula of MgH2 _reacting with water to produce hydrogen is shown in the following formula (1). MgH ₂ + 2H ₂ O → Mg(OH) ₂ + 2H ₂ ... (1)

FIG. 4 is a schematic cross-sectional view showing the reaction of MgH ₂ and water in the hydrogen generating sheet 1 to generate hydrogen. First, water comes into contact with the surface of the coating 12, and the protruding parts of the MgH ₂ particles 14 from the resin 13 react with the water. After the MgH ₂ reacts with water, gaps are formed in the coating 12 between the MgH ₂ particles 14 reacted with water and the resin 13 , and water penetrates into the coating 12 through the gaps. The immersed water reacts with MgH ₂ , further creating voids, and the water further immerses. In FIG. 4 , the path of the immersed water is shown by solid arrows. MgH2 reacts with water to produce _hydrogen . The generated hydrogen is released from the surface of the coating 12 to the outside through the voids. In Fig. 4, dashed arrows indicate the path of hydrogen. In this way, hydrogen is generated from the hydrogen generating sheet 1 .

FIG. 5 is a flow chart showing the sequence of the method of manufacturing the hydrogen generating sheet 1 . Hereinafter, the step is abbreviated as S. The acidic substance is added to the ultraviolet curable resin by mixing an acidic substance such as citric acid or malic acid with the fluid ultraviolet curable resin ( S1 ). The coating 12 is formed to contain an acidic substance by adding an acidic substance to the ultraviolet curable resin. The reaction between water and MgH ₂ in the coating 12 is promoted through the inclusion of an acidic substance in the coating 12 . Therefore, hydrogen is efficiently generated from the hydrogen generating sheet 1 .

Next, MgH ₂ powder is mixed in the fluid UV curable resin (S2). The average molecular weight of the MgH ₂ particles 14 contained in the MgH ₂ powder is, for example, 1 to 80 μm. The MgH ₂ powder may contain only MgH _{2 particles 14 having a single diameter, or a plurality of types of MgH 2 particles} 14 having different diameters may be mixed.

Next, screen printing is performed on the base sheet 11 using an ultraviolet curable resin mixed with MgH ₂ powder as a printing paste ( S3 ). An ultraviolet curable resin mixed with MgH ₂ powder was attached to the base sheet 11 via screen printing. Screen printing is performed by a screen printing device using a pre-made printing plate. In this case, selection of the ultraviolet curable resin is important. The reaction speed of MgH ₂ embedded in the coating 12 varies depending on the water permeability of the ultraviolet curable resin. Therefore, it is necessary to select an ultraviolet curable resin having appropriate water permeability so that MgH ₂ can react with water appropriately. In addition, in order to adjust the situation where MgH ₂ is mixed into the ultraviolet curable resin during screen printing, the ultraviolet curable resin is selected to have a high viscosity.

A printing plate is predetermined so that ultraviolet curable resin is attached to the base sheet 11 according to a prescribed pattern as shown in FIG. 1 . According to the viscosity of the ultraviolet curable resin and the content of MgH ₂ powder (the blending ratio of MgH ₂ powder to the ultraviolet curable resin), the printing plate is adjusted in advance so that a part of the MgH ₂ particles 14 on the surface of the film 12 is formed when the ultraviolet curable resin is cured. Protrudes from the resin 13. For example, the size of each part of the printing plate is adjusted so that the thickness of the ultraviolet curable resin attached to the base sheet 11 when it is cured becomes the average value of the diameters of the MgH particles ₁₄ contained in the MgH powder, or more _than the above average value. slightly smaller specific value. Also, the film thickness of the film 12 is adjusted so that a part of the MgH ₂ particles 14 protrude from the resin 13, and an appropriate mesh type of the printing plate is selected. In this way, the thickness of the coating 12 is adjusted so that a part of the MgH ₂ particles 14 protrude from the resin 13 on the surface of the coating 12 during screen printing. S1 and S2 can also be performed in reverse order.

Next, by irradiating ultraviolet rays, the ultraviolet curable resin is cured ( S4 ). The coating film 12 made of the resin 13 mixed with MgH ₂ powder is formed by curing the ultraviolet curable resin. Next, screen printing is performed on the film 12 using an ultraviolet curable resin mixed with MgH ₂ powder as a printing paste ( S5 ). An ultraviolet curable resin mixed with MgH ₂ powder is attached to the film 12 . The printing plate used in S5 may also be pre-adjusted so that part of the MgH ₂ particles 14 protrude from the resin 13 on the surface when the ultraviolet curable resin is cured. For example, the size of each part of the printing plate is adjusted so that the thickness of the UV-curable resin adhering to the film 12 when cured becomes the average value of the diameters of the MgH ₂ particles 14 or a specific value slightly smaller than the above-mentioned average value. Next, returning to the process of S4, the ultraviolet curable resin is cured. By repeating the processes of S5 and S4, the film 12 is formed by laminating layers of resin 13 mixed with MgH ₂ powder. For example, the plurality of resin 13 layers contained in the film 12 each have an average value of the diameter of the MgH ₂ particles 14 or a thickness slightly smaller than the aforementioned average value.

The processes of S4 and S5 are performed according to the number of layers of resin 13 to be laminated. Specifically, the processing of S4 is performed for the same number as the number of layers of the resin 13 to be laminated, and the processing of S5 is performed for a number that is one less than the number of layers of the resin 13 to be laminated. When the layer of resin 13 mixed with MgH ₂ powder is one layer, the process of S5 is not performed. After the necessary number of layers of the resin 13 are formed, the hydrogen generating sheet 1 is completed ( S6 ), and the process ends.

By manufacturing the hydrogen generating sheet 1 using screen printing, the hydrogen generating sheet 1 can be manufactured easily, safely, and in large quantities. In addition, screen printing can increase the thickness of the printing paste for printing by appropriately adjusting the printing plate, and the thickness of the printing paste can be adjusted to an appropriate size. The thickness of the film 12 can be appropriately adjusted by performing screen printing. In particular, the thickness of the coating 12 can be adjusted to be substantially the same size as the diameter of the MgH ₂ particles 14 so that a part of the MgH ₂ particles 14 protrude from the resin 13 on the surface of the coating 12 . Part of the MgH ₂ particles 14 protrude from the resin 13 on the surface of the coating 12, as shown in FIG.

Since an ultraviolet curable resin is used as the resin 13, in the process of S4, the ultraviolet curable resin is hardened by irradiation of ultraviolet rays, and the solid resin 13 can be produced instantaneously. After screen printing, the ultraviolet curable resin is cured instantaneously to determine the thickness of the film 12, so that the thickness of the film 12 can be accurately adjusted to a desired size. In addition, the process of forming the film 12 can be performed in a short time.

In addition, resins other than ultraviolet curable resins may be used as the resin 13 . For example, as the resin 13 , a solvent of an ink used in general screen printing can also be used. In the form of using a resin other than the ultraviolet curable resin, in S3 and S5, the resin mixed with MgH ₂ powder is used as a printing paste, and screen printing is performed. In S4, the resin is cured by drying the printed matter to form a film 12 made of the resin 13 mixed with MgH ₂ powder. The hydrogen generating sheet 1 can also be manufactured in this way. In addition, a paste-like substance other than resin may be used as the substance constituting the coating film 12 . The material constituting the film 12 has a viscosity that can be used as a printing paste used in screen printing other than resin, and can be cured after printing. For example, it may be dried or hardened using a hardening agent. MgH _{2 powder is mixed into such a paste substance, and the paste substance mixed with MgH 2 powder} is used as a printing paste, and screen printing is performed. The film 12 is formed by curing the paste-like substance after screen printing. In this way, the hydrogen generating sheet 1 can be manufactured.

The hydrogen generating sheet 1 can be easily mass-produced via screen printing, so the hydrogen generating sheet 1 can be easily used. Since the MgH ₂ powder is fixed to the resin 13, MgH ₂ hardly leaks out, and the hydrogen generating sheet 1 can be manufactured and used safely. By easily generating hydrogen, it is possible to easily use the hydrogen generating sheet 1 as a hydrogen generating source.

The hydrogen generating sheet 1 is used for accessories worn on the body, clothing, and other accessories. Wearing items such as belts, bandages, compresses, masks, or diapers. FIG. 6 is a schematic view showing an example of a bandage 2 using the hydrogen generating sheet 1 . The bandage 2 is composed of a hydrogen generating sheet 1 and an adhesive tape member 21 for sticking the hydrogen generating sheet 1 on human skin. The hydrogen generating sheet 1 is arranged so that the surface of the film 12 faces the skin when the bandage 2 is pasted on the human skin. A sheet through which water and hydrogen can pass may be arranged between the hydrogen generating sheet 1 and the skin. Wearing articles other than the bandage 2 also have the hydrogen generating sheet 1 disposed so that the surface of the film 12 faces the surface of the body. When the bandage 2 does not stick to the human skin, a protective sheet that prevents water from adhering may be attached to a certain surface of the coating 12 of the hydrogen generating sheet 1 . For example, the protective sheet is made of a material that does not allow passage of liquid water and water vapor. Kiwi Bandage 2 sticks to human skin after separating the protective sheet. Wearable items other than Kiwi Bandage 2 can also be equipped with protective sheets.

Water is generated from human skin, and the generated water comes into contact with the surface of the coating film 12 of the hydrogen generating sheet 1 . For example, liquid water contained in sweat generated from the skin comes into contact with the surface of the coating 12 . Also, the water vapor evaporated from the skin comes into contact with the surface of the coating 12 . The water in contact with the surface of the coating 12 reacts with MgH ₂ to generate hydrogen, and the water penetrates into the inside of the coating 12 . The immersed water reacts with MgH2 to produce _hydrogen . The generated hydrogen is released from the surface of the membrane 12 and supplied from the skin to the body. Hydrogen supplied to the body removes hydroxyl radicals present in the body. Therefore, by reducing the hydroxyl radicals that cause cell damage, the person who puts on the plaster 2 can achieve health-enhancing effects such as the prevention of diseases caused by hydroxyl radicals, or cosmetic effects such as the suppression of rough skin. Wearing items other than Kizuna Plaster 2, such as masks, can also obtain health-enhancing effects or beauty effects.

The hydrogen generating sheet 1 can also be used as a protective material for bandaging body wounds to disinfect or protect the wounds. Alternatively, the hydrogen generating sheet 1 can also be used as a protective belt covering and protecting a part of the body such as the wrist or the ankle. If used in this way, hydroxyl free radicals are reduced through the generation of hydrogen, resulting in a health-enhancing effect on the body.

FIG. 7 is a schematic diagram of an example of a diaper 3 using the hydrogen generating sheet 1 . FIG. 7 shows the appearance of the diaper 3 and a schematic cross section of a part of the diaper 3 . The diaper 3 is constituted by a plurality of sheets such as overlapping cloth. The plural sheets include the outermost layer 31 and the innermost layer 32 . The hydrogen generating sheet 1 is disposed between the plurality of sheets including the outermost layer 31 and the innermost layer 32 . The hydrogen generating sheet 1 is arranged in such a direction that the body of the person wearing the diaper 3 faces the surface of the cover film 12 . The sheet including the innermost layer 32 arranged inside the hydrogen generating sheet 1, that is, the sheet sandwiched between the hydrogen generating sheet 1 and the body, is made of a material that allows water and hydrogen to pass through.

Water is generated from the body of the person wearing the diaper 3 , and the generated water passes through the sheet disposed inside the hydrogen generating sheet 1 and comes into contact with the surface of the coating 12 of the hydrogen generating sheet 1 . For example, liquid water contained in sweat or water vapor evaporated from the skin comes into contact with the surface of the coating film 12 . The water in contact with the surface of the coating 12 reacts with MgH ₂ to generate hydrogen, the water penetrates into the inside of the coating 12 , and the immersed water reacts with MgH ₂ to generate hydrogen. The generated hydrogen is released from the surface of the membrane 12 and supplied into the body through the sheet arranged inside the hydrogen generating sheet 1 . Hydrogen can reduce the hydroxyl free radicals in the body and improve the health of people wearing diapers. In addition, the hydrogen generating sheet 1 may be disposed on the innermost side of the diaper 3 .

Clothing using the hydrogen generating sheet 1 is composed of a plurality of sheets such as overlapping cloth. The hydrogen generating sheet 1 is disposed between overlapping sheets. The sheet disposed inside the hydrogen generating sheet 1 is made of a material that allows water and hydrogen to pass through. The hydrogen generating sheet 1 is arranged in such a direction that the body of the person wearing the clothes faces the surface of the film 12 . Water generated from the body of the person wearing the clothes reacts with MgH ₂ contained in the hydrogen generating sheet 1 to generate hydrogen, and hydrogen is supplied to the body to obtain health-enhancing effects or beauty effects. Also, the hydrogen generating sheet 1 may be arranged on the innermost side of the clothes. The clothes consist of a single piece, and the hydrogen generating sheet 1 may be attached to the single piece in the direction where the body of the person wearing the clothes faces the surface of the membrane 12 .

The hydrogen generating sheet 1 can also be used in clothing for animals. For example, collars worn by animals or clothes worn by animals may also include the hydrogen generating sheet 1 . In this aspect, the hydrogen generating sheet 1 may be arranged in a direction in which the body of the animal wearing the apparel and the surface of the film 12 face each other. Usually the animal is covered with long fur so may not reach the skin. In contrast, adding hydrogen to body hair has a great effect on making the hair soft and thick.

The hydrogen generating sheet 1 can also be used as a packaging material for packaged goods. The items packaged by the packaging material of the hydrogen generating sheet 1 are, for example, fresh products such as food. FIG. 8 is a schematic diagram showing a hydrogen generating sheet 1 used as a packaging material 5 for packaging fresh products 4 . For example, the packaging material 5 is a sheet for packaging. The hydrogen generating sheet 1 may be used alone as the packaging material 5 , and the packaging material 5 may contain sheets other than the hydrogen generating sheet 1 . The hydrogen generating sheet 1 is used so that the surface of the film 12 faces the fresh produce 4 . That is, the packaging material 5 packs fresh products 4 with the surface on which the film 12 of the hydrogen generating sheet 1 is provided as the inner side. Another sheet through which water and hydrogen can pass may be arranged between the hydrogen generating sheet 1 and the fresh produce 4 . When the packaging material 5 is in a state where the article is not packaged, a protective sheet that prevents the adhesion of water may be pasted on the inner surface. For example, the protective sheet is made of a material that does not allow passage of liquid water and water vapor. The packaging material 5 packs articles after separating the protective sheet.

Water is generated from fresh produce 4 packaged in packaging material 5 , and the generated water comes into contact with the surface of film 12 of hydrogen generating sheet 1 . For example, liquid water adhering to the fresh produce 4 or water vapor evaporated from the surface of the fresh produce 4 comes into contact with the surface of the film 12 . The water in contact with the surface of the coating 12 reacts with MgH ₂ to generate hydrogen, the water penetrates into the inside of the coating 12 , and the immersed water reacts with MgH ₂ to generate hydrogen. The generated hydrogen is released from the surface of the film 12 to supply the hydrogen to the fresh produce 4 . The supplied hydrogen reacts with the oxygen contained in the fresh produce 4 to form water, which can prevent the spoilage of the fresh produce 4 and maintain the freshness of the fresh produce 4 . That is to say, the freshness of the fresh products 4 packaged with the hydrogen generating sheet 1 can be maintained better than that without supplying hydrogen. By packaging the fresh produce 4 with the hydrogen generating sheet 1 and supplying hydrogen to the fresh produce 4, the freshness of the fresh produce 4 can be maintained and the preservation of the fresh produce 4 can be improved. When the fresh product 4 is food, the umami components inside the fresh product 4 are increased due to hydrogen, making the fresh product 4 delicious.

Next, the hydrogen generating performance of the hydrogen generating sheet 1 will be described. Hydrogen generation experiments were conducted with respect to a plurality of hydrogen generating sheets 1 having different numbers of laminated layers of resin 13 . Using screen printing twice, samples containing two layers of resin 13 mixed with MgH ₂ powder in the film 12, samples containing three layers of resin 13, and samples containing four layers of resin 13, as hydrogen A sample of slice 1 is generated. Regardless of any of the samples, a powder mixed with a plurality of types of MgH ₂ particles 14 having an average diameter of 15 μm, 30 μm, and 60 μm was used as the MgH ₂ powder mixed into the resin 13 . The amount of MgH ₂ per piece was 0.26 g in the sample containing two resin 13 layers, 0.39 g in the sample containing three resin 13 layers, and 0.52 g in the sample containing four resin 13 layers. The number of coatings 12 formed on a single sheet was 980 per sample. The samples of each hydrogen generating sheet 1 were immersed in water, and the water temperature was maintained at 40° C., and the generated hydrogen was collected.

FIG. 9 is a graph showing the collection amount of hydrogen generated by a plurality of types of hydrogen generating sheets 1 in which the number of laminated layers of resin 13 is different. The abscissa in the figure represents the time in which the sample of the hydrogen generating sheet 1 is immersed in water, and the unit is hour. The ordinate represents the collected amount of generated hydrogen in ml. The amount of hydrogen collected is the sum of the amounts of hydrogen collected between the immersion times indicated on the abscissa. In Fig. 9, the results of the sample containing two layers of resin 13 are represented by solid circles, the results of the sample containing three layers of resin 13 are represented by triangles, and the results of the sample containing four layers of resin 13 are represented by squares .

As shown in FIG. 9 , the larger the number of layers of the laminated resin 13 , the larger the amount of hydrogen generated. This is because the amount of MgH ₂ increases as the number of layers of the resin 13 increases. Also, the ratio of the hydrogen collection amount at each immersion time to the maximum value of the hydrogen collection amount was approximately the same for all samples. This shows that in the hydrogen generating sheet 1, the frequency of the reaction of water and MgH ₂ to generate hydrogen is almost independent of the number of layers of the resin 13. That is, even if a plurality of layers of the resin 13 are laminated, the hydrogen generating sheet 1 does not hardly generate hydrogen. Therefore, the hydrogen generating sheet 1 can generate a large amount of hydrogen by forming the film 12 through a plurality of lamination layers of the resin 13 mixed with MgH ₂ powder.

Hydrogen generation experiments were performed on a plurality of hydrogen generating sheets 1 having different types of resin 13 used for the film 12 . As samples of the hydrogen generating sheet 1 , a sample in which the resin 13 is an ink solvent commonly used in screen printing and a sample in which the resin 13 is an ultraviolet curable resin were used. As the MgH ₂ powder mixed into the resin 13, a powder having MgH ₂ particles 14 having an average diameter of 15 μm was used in any of the samples. In any sample, the number of layers of resin 13 is two layers, and the amount of MgH ₂ per sheet is 0.65 g. The number of films 12 formed per sheet was 980 per sample. The samples of each hydrogen generating sheet 1 were immersed in water, and the water temperature was maintained at 40° C., and the generated hydrogen was collected.

FIG. 10 is a graph showing the collection amount of hydrogen generated by a plurality of hydrogen generating sheets 1 having different types of resin 13 . The abscissa in the figure represents the time when the sample of the hydrogen generating sheet 1 was immersed in water, and the ordinate represents the collected amount of generated hydrogen. In FIG. 10 , the results of the samples in which the resin 13 is a solvent are indicated by solid circles, and the results of the samples in which the resin 13 is an ultraviolet curable resin are indicated by squares.

As shown in FIG. 10 , the amount of hydrogen generated in the sample in which the resin 13 is an ultraviolet curable resin is larger than that in the sample in which the resin 13 is a solvent. Therefore, by using an ultraviolet curable resin as the resin 13, the hydrogen generating sheet 1 can generate a large amount of hydrogen. Also, as shown in FIG. 10, hydrogen can be generated even when the sample in which the resin 13 is a solvent has a smaller amount of hydrogen than the sample in which the resin 13 is an ultraviolet curable resin. Therefore, the hydrogen generating sheet 1 using a resin other than the ultraviolet curable resin as the resin 13 can also be used to generate hydrogen.

Also, in this embodiment, an example of using pure MgH ₂ as the magnesium-based hydride is shown, but the hydrogen generating sheet 1 may use other magnesium-based hydrides that react with water to generate hydrogen. For example, a magnesium-based hydride powder in which a metal element or a non-metallic element other than Mg is added to MgH ₂ may be used as the magnesium-based hydride powder mixed in the resin 13 for the hydrogen generating sheet 1 .

The present invention is not limited to the content of the above-mentioned embodiment, and various modifications are possible within the range indicated in the claims. That is, an embodiment obtained by combining technical means appropriately modified within the scope indicated in the claims is also included in the technical scope of the present invention.

1: Hydrogen generating sheet 11: Base sheet 12: Coating film 13: Resin 14: MgH ₂ particles 2: Bonding plaster 3: Diaper 31: Outermost layer 32: Innermost layer 4: Fresh food 5: Packaging material

Fig. 1 is a perspective view showing a hydrogen generating sheet. Fig. 2 is a cross-sectional view of an example of a hydrogen generating sheet. Fig. 3 is a cross-sectional view of another example of the hydrogen generating sheet. 4 is a schematic cross-sectional view showing the reaction of MgH ₂ and water in a hydrogen generation chip to generate hydrogen. Fig. 5 is a flowchart showing the sequence of a method of manufacturing a hydrogen generating sheet. Fig. 6 is a schematic diagram showing an example of a bandage using a hydrogen generating sheet. Fig. 7 is a schematic diagram of an example of a diaper using a hydrogen generating sheet. Fig. 8 is a schematic diagram showing a hydrogen generating sheet used as a packaging material for packaging fresh products. Fig. 9 is a graph showing the collected amount of hydrogen generated from a plurality of hydrogen generating sheets having different numbers of laminated resin layers. Fig. 10 is a graph showing the collected amount of hydrogen generated from a plurality of hydrogen generating sheets having different types of resins.

1: Hydrogen generation sheet

11: Basic film

12: film

Claims (9)

A hydrogen generating sheet, consists of the base sheet, and Formed from a resin mixed with magnesium-based hydride powder, it has a coating that overlaps the aforementioned base sheet, The particles contained in the aforementioned powder are embedded in the aforementioned film, At least a part of the particles contained in the powder protrude from the resin on the surface of the coating, Hydrogen molecules generated by the reaction of water and the magnesium-based hydride are released from the surface of the coating. The hydrogen generating sheet according to claim 1, wherein the film is composed of a plurality of laminated layers of the resin mixed with the powder. The hydrogen generating sheet according to claim 1 or 2, wherein the resin is an ultraviolet curable resin. A diaper, which is worn on the body, contains the hydrogen generating sheet according to any one of claims 1 to 3, The hydrogen generating sheet is arranged such that the surface of the film contained in the hydrogen generating sheet faces the surface of the body, or a sheet through which water passes is interposed between the body and the hydrogen generating sheet. A packaging material, which contains the hydrogen generating sheet according to any one of claims 1 to 3 in the packaging material of the packaged goods, The hydrogen generating sheet is arranged such that the surface of the film contained in the hydrogen generating sheet faces the surface of the article, or a sheet through which water passes is interposed between the article and the hydrogen generating sheet. A method of manufacturing a hydrogen generating sheet, which is a method of manufacturing a hydrogen generating sheet that generates hydrogen molecules through the reaction of water and magnesium-based hydride, which is The magnesium-based hydride powder is mixed in the fluid resin, The aforementioned resin mixed with the aforementioned powder is used as a printing paste, when the aforementioned resin is cured, the particles contained in the aforementioned powder are embedded in the aforementioned resin, and the thickness is adjusted so that at least a part of the particles contained in the aforementioned powder protrudes from the aforementioned resin, And screen printing on the base sheet, The foregoing resin is cured. The method for producing a hydrogen generating sheet according to claim 6, wherein a plurality of layers of the resin mixed with the powder are formed by repeating screen printing of the resin mixed with the powder as a printing paste and hardening of the resin Laminated film. The method for producing a hydrogen generating sheet according to claim 6 or 7, wherein the aforementioned resin is an ultraviolet curable resin, The aforementioned resin is cured by irradiation with ultraviolet rays. A method for producing a hydrogen generating sheet, wherein an acidic substance is added to the resin.

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