JP3096946U - Dehumidification sheet - Google Patents

Abstract

An object of the present invention is to provide a dehumidifying sheet that can be dried in a relatively short time even in a cloudy sky or the like.
SOLUTION: Bincho charcoal powder is applied to at least one surface of two nonwoven fabrics 12. It is a preferred embodiment of the present invention that the bincho charcoal powder is mixed with the gravure printing ink at about 20% by weight and printed on the surface of the nonwoven fabric.
[Selection diagram] Fig. 1

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a dehumidifying sheet, and more particularly to a dehumidifying sheet suitable for use under a mattress or for use on a closet floor.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a dehumidifying sheet has been known which is laid under a futon or on a floor in a closet to absorb the moisture of the futon and dehumidify it. Such a dehumidifying sheet (also referred to as a moisture-proof sheet) is formed by abutting two nonwoven fabrics in a state in which a drying / dehumidifying agent such as silica gel is divided and sandwiched therebetween. The nonwoven fabric constituting the conventional dehumidifying sheet takes into consideration the air permeability, is not particularly colored, and remains white. As such a conventional dehumidifying sheet, there is a sheet described in Patent Document 1 below.
[0003]
[Patent Document 1]
Utility Model Registration No. 3080091 (FIG. 6, Claim 3)
[0004]
[Problems to be solved by the invention]
Such a dehumidifying sheet is dried in the sun to evaporate the moisture when the drying / dehumidifying agent contains moisture, but it takes a long time to dry in a cloudy sky or the like. Further, the conventional dehumidifying sheet is intended to remove moisture discharged from the human body through the futon, and other effects cannot be expected. Therefore, an object of the present invention is to provide a dehumidifying sheet that can be dried in a relatively short time even in a cloudy sky or the like and is useful for the human body.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, at least one surface of two nonwoven fabrics is coated with a powder of Bincho charcoal. With this configuration, not only can drying be done in a short time, but also the effect of far-infrared radiation of Bincho charcoal powder helps keep the human body warm, and Bincho charcoal powder is effective in removing bad smells and harmful substances .
[0006]
That is, according to the present invention, there is provided a dehumidifying sheet for absorbing and dehumidifying moisture in the air, wherein a drying / dehumidifying agent is subdivided and held between two nonwoven fabrics. A powder of Bincho charcoal applied to at least one surface of the nonwoven fabric of the present invention.
[0007]
According to the present invention, there is provided a dehumidifying sheet for absorbing and dehumidifying moisture in the air, wherein a drying / dehumidifying agent is divided into two parts and held between two nonwoven fabrics.
At least one surface of the dehumidifying sheet is printed with a mixture of gravure ink and approximately 20% by weight of bincho charcoal powder, and then the printed portion is dried. And a dehumidifying sheet formed by coating a resin containing a curing agent.
[0008]
[Embodiment of the invention]
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the surface of an embodiment of the dehumidifying sheet according to the present invention. FIG. 2 is a top view of the dehumidifying sheet of the present invention. FIG. 3 is a cross-sectional view taken along the line AA of the dehumidifying sheet 10 in FIG. This dehumidifying sheet 10 is formed by bonding two nonwoven fabrics 12 and 14 together. The two nonwoven fabrics 12 and 14 are pressurized and heated by a heat roll of a manufacturing apparatus (not shown) to melt the resin layers adhering to the opposite sides of the nonwoven fabrics 12 and 14 and to adhere to each other by pressure bonding. As the resin layer, a resin sheet in which a polyethylene sheet is attached to one surface of a polyester sheet can be used.
[0009]
The surface to be pressure-bonded is a flat plate, and is configured to form a bag portion between the nonwoven fabrics 12 and 14 for holding the drying / dehumidifying agent in small portions. A predetermined amount of B-type silica gel having a particle size of 2 to 5 mm as a drying / dehumidifying agent is held in the bag. This dehumidifying sheet 10 has a width W of 90 cm and a length L of 100 cm. Also, 16 bags 16 containing the drying / dehumidifying agent are provided in the width direction and 16 in the length direction. Note that the length can be further increased or shortened as necessary.
[0010]
FIG. 4 is a plan view showing the back surface of the dehumidifying sheet 10 shown in FIG. Bincho charcoal powder 20 is applied to at least a part or substantially all of the surface of at least one of the two nonwoven fabrics 12 and 14 constituting the dehumidifying sheet 10. In the present embodiment, the bincho charcoal powder 20 is mixed with gravure printing ink at approximately 20% by weight and printed on the surface of the nonwoven fabric 14 corresponding to the back side of the dehumidifying sheet 10. The back surface of the dehumidification sheet 10 after printing is black or dark gray, but the shape of the bag portion 16 can be confirmed. In FIG. 4, this situation is indicated by hatching for convenience. In printing, it is a preferable embodiment to mix a urethane-based resin, an organic solvent, and a curing agent with gravure printing ink.
[0011]
In this embodiment, the bincho charcoal powder 20 is applied to one surface, that is, the surface of the nonwoven fabric 14 on the back surface side, but can be applied to the surface of the nonwoven fabric 12 on the front surface, if necessary. . In the embodiment of FIG. 4, the coating is applied to substantially the entire area of the front surface of the nonwoven fabric 14 on the back side, but may be applied to only a partial area instead of the entire area. Further, Bincho charcoal powder 20 may be applied to substantially the entire area or a part of the surface of the nonwoven fabrics 12 and 14 so as to draw a predetermined pattern.
[0012]
FIG. 5 is a diagram showing the process of the method for processing the dehumidifying sheet of the present invention. The two nonwoven fabrics 12 and 14 are attached to each other, and the drying / dehumidifying agent is held in the bag 16 formed therebetween, that is, the conventional dehumidifying sheet is sent out from the raw fabric feeding device 31. The fed web 22 passes through a tension roller 32 and the like while being sandwiched between a rubber roller 33 and a plate roller 34. The plate roller 34 absorbs gravure printing ink including bincho charcoal (not shown) held by the ink pad 35 and transfers the ink to the back surface of the raw fabric 22 of the dehumidifying sheet 10, that is, the exposed surface side of the nonwoven fabric 14. I do. Thereafter, the web 22 of the dehumidifying sheet 10 is heated by a heat drying heater 36 and is dried by receiving a wind by a blow dryer 37.
[0013]
Thereafter, the web 22 passes while being sandwiched between the rubber roller 38 and the plate roller 39. The plate roller 39 absorbs a coating agent (not shown) held on the ink pad 40 and transfers the coating agent to the back surface of the raw fabric 22 of the dehumidifying sheet 10. Therefore, the resin coating agent covers the gravure printing ink containing Bincho charcoal. Thereafter, the raw fabric 22 of the dehumidifying sheet 10 is heated by a heat drying heater 42 and is dried by receiving a wind by a blow dryer 44. Thereafter, the web 22 of the dehumidifying sheet 10 is wound by the web winding device 46.
[0014]
The raw fabric 22 of the dehumidifying sheet 10 processed in this way is cut into a size of one product and packed into a bag to be a final product. In the present embodiment, since the web 22 is transported at approximately 40 to 50 m / sec, the printing, drying, and coating steps are performed on the web 22, that is, the dehumidifying sheet 10 from approximately 40 to 50 m / sec. It is performed while conveying at 50 m / sec.
[0015]
The particle size of the Bincho charcoal powder mixed with the gravure printing ink is approximately 0.88 μm to 16 μm. As can be seen from the graph showing the frequency distribution and the cumulative distribution in FIG. The frequency of 7 μm is the highest. The reason for covering the gravure printing ink with the resin coating agent is that the printed Bincho charcoal powder 20 does not easily peel off from the surface of the nonwoven fabric, and the futon or room to be used or This is to prevent the hands of the person from becoming dirty. If the layer of the resin coating agent is too thick, the effect of removing harmful substances from Bincho charcoal is weakened. The analysis results showing the components and characteristics of the used Bincho charcoal are shown in the table of FIG. 10 and the graph of FIG.
[0016]
FIG. 7 is a table showing the harmful substance removing effect of the dehumidifying sheet coated with the Bincho charcoal powder of the present invention. Specifically, the dehumidifying sheet of the present invention (“non-woven fabric containing bincho charcoal” in the table) and the conventional dehumidifying sheet not coated with bincho char (“nonwoven fabric containing no bincho char” in the table) were used in an environment containing formaldehyde. , The density after a predetermined elapsed time was measured. "Blank" in the table is a case where no nonwoven fabric is provided. As is clear from this table, when looking at the concentration of formaldehyde, the concentration drop of the conventional product after 2 hours is from 5.0 ppm to 0.2 ppm and 4%, whereas the bincho charcoal sheet is from 5.0 ppm. 0.1 ppm and 2%. That is, it can be seen that the dehumidifying sheet of the present invention reduces formaldehyde in half compared to the conventional dehumidifying sheet having no bincho charcoal. Although not shown in the table of FIG. 7, the antibacterial properties of the Bincho charcoal sheet have also been verified.
[0017]
FIG. 8 is a graph of an experimental result showing that the temperature of the dehumidifying sheet of the present invention rises in a shorter time than that of a conventional white dehumidifying sheet. With respect to the dehumidifying sheet of the present invention and the conventional white dehumidifying sheet to which Bincho charcoal powder is not applied, the temperature rise when the reflex lamp is arranged at a distance of 30 cm and irradiated with light is arranged inside the sample. It was measured with a thermocouple thermometer. As is clear from this graph, the conventional dehumidifying sheet only increased to about 38 ° C. after 120 minutes from 20 ° C. at the start of measurement, whereas the dehumidifying sheet of the present invention had a temperature of 20 ° C. at the start of measurement. The temperature rose to about 64 ° C. 120 minutes after the test, and it was apparent that the effect of increasing the temperature was apparent by applying Bincho charcoal powder.
[0018]
FIG. 9 is a graph showing experimental results showing that the dehumidifying sheet of the present invention has a higher far-infrared ray emission effect than the conventional dehumidifying sheet in a white state. For the dehumidifying sheet of the present invention and a conventional white dehumidifying sheet to which Bincho charcoal powder is not applied, a heat source of 40 ° C. was applied to measure 4 to 20 μm, that is, the emitted heat ray level in the far infrared wavelength region was measured. is there. As is clear from this graph, in the case of the conventional dehumidifying sheet, the spectral emissivity varies in the range of 37% to 86% in the above-mentioned wavelength range, but in the dehumidifying sheet of the present invention, the entire area of 4 μm to 20 μm. Over a range of approximately 76% to 79%. Further, comparing the integrated value of the spectral emissivity in this wavelength range, that is, the substantial total radiant energy of far infrared rays, the conventional dehumidifying sheet is 67.8%, whereas the dehumidifying sheet of the present invention is: 77.3%. From this comparison result, it can be seen that the amount of far-infrared radiation of the dehumidifying sheet of the present invention is clearly larger than that of the conventional product.
[0019]
FIG. 12 is a graph showing the effect of the present invention in comparison with a conventional product. In other words, the conventional dehumidifying sheet not coated with Bincho charcoal powder and the dehumidifying sheet according to the present invention were prepared, and under each weather of cloudy weather and fine weather, the drying condition was measured by weight measurement. It is shown. In the case of cloudy weather, the dehumidifying sheet of the present invention shows an improvement of about 20% as compared with the conventional product, and it can be seen that the dehumidifying sheet dries in a shorter time. Also, in the case of sunny weather, the dehumidifying sheet of the present invention shows an improvement of about 250% as compared with the conventional product, and it can be seen that the sheet is dried about 2.5 times faster.
[0020]
Although the above embodiment has been described by taking as an example a dehumidifying sheet mainly used under a mattress, the present invention can also be applied to a dehumidifying sheet for dehumidifying a closet or shoes.
[0021]
[Effect of the invention]
As described above, according to the present invention, bincho charcoal powder is applied to at least one surface of two bonded nonwoven fabrics, so that heat is efficiently absorbed at the time of drying, and even if it is a cloudy sky, it is relatively absorbed. It can be dried in a short time. In addition, since the powder of Bincho charcoal emits far-infrared rays, a so-called far-infrared effect can be obtained, a good effect on health can be expected, and a comfortable environment can be expected by removing bad smells and harmful substances.
[Brief description of the drawings]
FIG. 1 is a plan view showing a surface of a preferred embodiment of a dehumidifying sheet according to the present invention.
FIG. 2 is a top view of the dehumidifying sheet of FIG.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is a plan view showing the back surface of the dehumidifying sheet shown in FIG.
FIG. 5 is a diagram showing a process of a method for processing a dehumidifying sheet according to the present invention.
FIG. 6 is a graph showing the frequency and cumulative distribution of the particle size of Bincho charcoal in the embodiment of the dehumidifying sheet of the present invention.
FIG. 7 is a table showing the effect of removing harmful substances when the embodiment of the dehumidifying sheet of the present invention is used.
FIG. 8 is a graph showing experimental results showing that the temperature of the dehumidifying sheet of the present invention rises in a shorter time than that of a conventional dehumidifying sheet in a white state.
FIG. 9 is a graph showing experimental results showing that the dehumidifying sheet of the present invention has a higher far-infrared ray emission effect than a conventional white dehumidifying sheet.
FIG. 10 is a table of analysis results showing components and characteristics of Bincho charcoal used in the present invention.
FIG. 11 is a graph of analysis results showing components and characteristics of Bincho charcoal used in the present invention.
FIG. 12 is a graph showing the effect of the present invention in comparison with a conventional product.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Dehumidification sheet 12, 14 Nonwoven fabric 16 Bag part 20 Bincho charcoal powder 22 Raw material 31 Raw material sending-out device 32 Tension rollers 33, 38 Rubber rollers 34, 39 Plate rollers 35, 40 Ink pads 36, 42 Heat drying heaters 37, 44 Ventilation Dryer 46 Raw material winding device

Claims (12)

A dehumidifying sheet for absorbing and dehumidifying moisture in the air, wherein a drying / dehumidifying agent is divided and held between two nonwoven fabrics, and at least one surface of the two nonwoven fabrics is used. A dehumidifying sheet, characterized in that Bincho charcoal powder is applied to the sheet. 2. The dehumidifying sheet according to claim 1, wherein the bincho charcoal powder is mixed with approximately 20% by weight of gravure printing ink and printed on the surface of the nonwoven fabric. 3. The dehumidifying sheet according to claim 1, wherein the particle size of the Bincho charcoal powder is approximately 0.8 to several tens μm. 4. The dehumidifying sheet according to any one of claims 1 to 3, wherein a urethane resin, an organic solvent, and a curing agent are mixed in the gravure printing ink. The dehumidifying sheet according to any one of claims 1 to 4, wherein the bincho charcoal powder is applied to substantially the entire surface of the at least one nonwoven fabric. The dehumidifying sheet according to any one of claims 1 to 4, wherein the powder of the Bincho charcoal is applied to a part of the surface of the at least one nonwoven fabric. The dehumidifying sheet according to any one of claims 1 to 4, wherein the bincho charcoal powder is applied to a surface of the at least one nonwoven fabric so as to form a predetermined pattern. The dehumidifying sheet according to any one of claims 1 to 7, wherein each of the two nonwoven fabrics has a width of 60 cm or more, and the width of the dehumidifying sheet is 60 cm or more. 9. The dehumidifying sheet according to claim 8, wherein the length of the dehumidifying sheet in the vertical direction is 80 cm or more. The dehumidifying sheet according to any one of claims 1 to 9, wherein the nonwoven fabric is obtained by attaching a polyethylene sheet to one surface of a polyester sheet. The dehumidifying sheet according to any one of claims 1 to 10, wherein B-type silica gel having a particle size of 2 to 5 mm is used as the drying / dehumidifying agent. A dehumidifying sheet for absorbing moisture in the air and dehumidifying, wherein a drying / dehumidifying agent is subdivided and held between two nonwoven fabrics,
At least one surface of the dehumidifying sheet is printed with a mixture of gravure ink and approximately 20% by weight of bincho charcoal powder, and then the printed portion is dried. A dehumidifying sheet formed by coating a resin containing a curing agent on a sheet.

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