KR102481308B1 - Super absorbent desiccant including replacement moment indicator - Google Patents

Abstract

The highly hygroscopic desiccant having a replacement time indicator includes a highly hygroscopic moisture-proof composition, a packaging material for sealing the highly hygroscopic moisture-proof composition, and a replacement time indicator provided on one side of the packaging material.

Description

High hygroscopic desiccant containing a replacement time indicator {SUPER ABSORBENT DESICCANT INCLUDING REPLACEMENT MOMENT INDICATOR}

The present invention relates to a highly hygroscopic desiccant, and more particularly, to a highly desiccant desiccant equipped with an indicator indicating when to replace the desiccant.

Since the desiccant has a strong affinity for moisture, it refers to a material that can directly absorb water vapor from the surrounding air, and is also called a desiccant, a desiccant, or a dehumidifying agent. There are various types of desiccants such as silica gel, bentonite, zeolite, and calcium chloride, and these desiccants are used throughout the industry to reduce damage from moisture during packaging of raw materials and products.

In the case of conventional dehumidifying products that absorb moisture and store the liquid dehumidifying composition inside a transparent container, there is an advantage in that the replacement time can be observed with the naked eye according to the degree to which the dehumidifying composition has changed to liquid. Not only does the moisture absorption rate drop, but the composition essentially includes a liquid storage container made of plastic, etc., and a moisture absorption sealing member to prevent liquid leakage after absorbing moisture. There are eco-friendly disadvantages, and accordingly, the development of a highly hygroscopic desiccant that can be easily observed with the naked eye while reducing the volume and having excellent moisture absorbing ability is required.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a highly hygroscopic desiccant that has excellent moisture absorbing ability and can easily observe the replacement time with the naked eye according to the degree of moisture absorbing.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A highly hygroscopic desiccant having a replacement time indicator according to some embodiments of the present invention includes a highly hygroscopic desiccant composition; A packaging material for sealing the highly hygroscopic moisture-proof composition; and a replacement time indicator provided on one side of the packaging material.

In some embodiments, the replacement time indicator indicates a first color when the remaining moisture absorption capacity of the highly hygroscopic moisture barrier composition is equal to or greater than a reference value, and as the highly absorbent moisture barrier composition absorbs external moisture, the remaining moisture absorption capacity is displayed. When the color value is lower than the reference value, the first color may be changed to a second color different from the first color.

On the other hand, the replacement time indicator is cobalt chloride paper, methyl violet paper, or cobalt (II) bromide (Cobr2) paper, and when the replacement time indicator is the cobalt chloride paper, the first color is blue, and the first color is blue. 2 color is pink, and when the replacement time indicator is the methyl violet paper, the first color is orange and the second color is green, but when the replacement time indicator is the cobalt bromide II paper, the first color is green and the second color may be pink.

The replacement timing indicator is characterized in that the cardboard coated with cobalt chloride, methyl violet or cobalt bromide II diluted in a water-soluble solvent.

The packaging material may include: a first packaging material covering one side of the highly hygroscopic moisture-proof composition; And a second packaging material covering the other side opposite to the one side of the highly hygroscopic moisture-proof composition, the edge of which is integrally sealed with the first packaging material to seal the highly hygroscopic moisture-proof composition with the outside, The highly hygroscopic desiccant may further include an indicator coupling member coupling the replacement time indicator to one region of the first packaging material.

Meanwhile, the first packaging material includes a packaging material opening exposing at least a partial area of the replacement time indicator to the outside of the packaging material, and the indicator coupling member includes: a transparent window covering the packaging material opening at an outermost portion; a first fixing frame for fixing the replacement time indicator and the first packaging material between the transparent window and the first packaging material; and a second fixing frame for fixing the replacement time indicator and the first packaging material between the highly hygroscopic moisture-proof composition and the first packaging material.

Here, the first fixing frame includes a first fixing frame opening exposing at least a portion of the replacement time indicator to the transparent window, and the second fixing frame exposes at least a portion of the replacement time indicator to the high hygroscopic property. It may include a second fixing frame opening to contact the moisture-proof composition.

In some embodiments, the highly hygroscopic moisture-proof composition may include a deliquescent material, a super absorbent polymer (SAP), a PH control material, starch, a preservative, and an antibacterial material.

On the other hand, the packaging material is characterized in that it is formed of a porous material that absorbs moisture from the outside but does not release the highly hygroscopic moisture-proof composition therein to the outside.

According to the embodiments of the present invention, the user can easily observe the replacement time of the highly hygroscopic desiccant with the naked eye by using the replacement time indicator provided in the highly hygroscopic desiccant, and thus can more easily maintain and manage the highly hygroscopic desiccant. be able to

In addition, the highly hygroscopic moisture-proof composition according to the embodiments of the present invention includes deliquescent substances such as MgCl ₂ and CaCl ₂ , superabsorbent polymers, PH adjusting substances such as NaOH, starch, and preservatives, and has excellent moisture absorption ability and absorption at the same time. It is also possible to prepare a highly hygroscopic desiccant having an excellent moisturizing ability to prevent the leaked moisture into a liquid state.

Furthermore, the highly hygroscopic moisture-proof composition contains antibacterial substances such as CaO and silver nanopowder, thereby having antibacterial performance as well as dehumidification, and can also suppress bacterial growth even in a humid environment.

1 is a perspective view schematically showing a highly hygroscopic desiccant including a replacement time indicator according to some embodiments of the present invention.
2 is an exploded perspective view illustratively shown to explain the coupling relationship of the replacement time indicator provided in the highly hygroscopic desiccant according to some embodiments of the present invention.
3 is a cross-sectional view illustratively shown to explain the coupling relationship of the replacement time indicator provided in the highly hygroscopic desiccant according to some embodiments of the present invention.
4 is a diagram showing a state of use of a highly hygroscopic desiccant according to some embodiments of the present invention by way of example.
5 is an exploded perspective view illustratively shown to explain a highly hygroscopic desiccant provided with a replacement time indicator according to some other embodiments of the present invention.
6 is a cross-sectional view illustratively shown to explain a highly hygroscopic desiccant provided with a replacement time indicator according to some other embodiments of the present invention.
Figure 7 is a test report of the mass change rate of the antibacterial dehumidifying agent applicable to the composition pack of the present invention tested by the FITI Test Research Institute.
8 to 10 are test reports of the antibacterial test of the antibacterial dehumidifying agent applicable to the composition pack of the present invention at the Korea Far Infrared Application Evaluation Institute.
11 and 12 are test reports conducted by the Korea Institute of Far Infrared Ray Application Evaluation for deodorization of the antibacterial and dehumidifying agent applicable to the composition pack of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Also, in this specification, the singular form may also include the plural form unless otherwise specified in the phrase. As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is present in the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

1 is a perspective view schematically showing a highly hygroscopic desiccant including a replacement time indicator according to some embodiments of the present invention, FIG. 2 is an exploded perspective view for explaining the coupling relationship of the replacement time indicator, and FIG. It is a cross-sectional view for explaining the coupling relationship of the replacement time indicator, and FIG. 4 is a view showing a state of use of the highly hygroscopic desiccant by way of example.

1 to 4, the highly hygroscopic desiccant 1 includes a highly hygroscopic desiccant composition 400, a packaging material 100 for sealing the highly hygroscopic desiccant composition 400, and a replacement period provided on one side of the packaging material 100. An indicator coupling member 300 coupling the indicator 200 and the replacement time indicator 200 to one side of the packaging material 100 may be included.

The packaging material 100 may include a first packaging material 100_1 covering the highly hygroscopic moisture-proof composition 400 on one side and a second packaging material 100_2 covering the highly hygroscopic moisture-proof composition 400 on the other side. The edges of the first packaging material 100_1 and the second packaging material 100_2 may be integrally sealed as shown in FIG. 1 to seal the highly hygroscopic moisture-proof composition 400 with the outside.

The first packaging material 100_1 and/or the second packaging material 100_2 may be formed of a porous material that absorbs moisture from the outside but prevents the highly hygroscopic moisture-proof composition 400 from escaping to the outside.

The replacement time indicator 200 may play a role of notifying the user of the replacement time (or regeneration time) of the highly hygroscopic desiccant 1 by color or the like. That is, the user can easily check whether the expiration date of the highly hygroscopic desiccant 1 has expired by visually observing the state of the replacement time indicator 200 . Depending on the state of the replacement time indicator 200, the user may discard the existing highly hygroscopic desiccant 1 and then use a new highly desiccant desiccant 1 or dry the existing highly desiccant desiccant 1 and reuse it.

In other words, the replacement time indicator 200 may serve to visually express the remaining moisture absorption capacity of the highly hygroscopic moisture-absorbing composition 400 included in the highly hygroscopic desiccant 1. For example, the replacement time indicator 200 displays a first color when the remaining moisture absorption capacity of the highly hygroscopic moisture-absorbing composition 400 is greater than a reference value (ie, when the lifespan as a desiccant is sufficiently remaining), and the highly hygroscopic moisture-absorbing composition 400 is removed from the outside. When the residual moisture absorptive capacity decreases below the reference value as moisture is absorbed (ie, when the lifespan of the desiccant is exhausted or not long), a second color changed from the first color may be displayed.

In some embodiments, the replacement time indicator 200 may be paper dyed or coated with cobalt chloride diluted in a water-soluble solvent. In this case, the first color is blue (see (a) of FIG. 4) and the second color is blue. The second color may be pink (see FIG. 4(b)).

In some other embodiments, the replacement time indicator 200 may be paper dyed or coated with methyl violet diluted in a water-soluble solvent, and in this case, the first color may be orange and the second color may be green.

In some other embodiments, the replacement time indicator 200 may be paper dyed or coated with cobalt II bromide diluted in a water-soluble solvent, in which case the first color may be green and the second color may be pink. there is.

In one embodiment, the water-soluble solvent is methanol, ethanol, n-propanol, isopropanol, monomethyl ether of ethylene glycol, monoethyl ether of ethylene glycol, THF, dioxane, acetone, acetonitrile, ethylene glycol It may be composed of dimethyl ether of col, or a mixture of two or more selected therefrom, but preferably the water-soluble solvent may be ethanol.

In one embodiment, the paper may be a type of paper that absorbs and discharges moisture well and ensures durability against repeated moisture absorption and discharge. For example, the paper may be cardboard, fixed paper, back paper, corrugated paper, powdered paper, upper paper, pine pine paper, pine vellum, or a laminate composed of two or more papers selected therefrom, but preferably the paper may be cardboard.

As another example, the replacement time indicator 200 may be litmus paper whose color changes according to moisture.

The indicator coupling member 300 may fixably couple the replacement time indicator 200 to one area of the first packaging material 100_1.

Specifically, the first packaging material 100_1 includes a packaging opening 100H exposing at least a portion of the replacement time indicator 200 to the outside of the first packaging material 100_1, and the replacement time indicator 200 is an indicator coupling member. It is fixedly coupled to the first packaging material 100_1 by 300, so that one side allows the user to observe the state (eg, color) of the replacement time indicator 200 through the transparent window 320, the other side. In contact with the highly hygroscopic moisture-absorbent composition 400, the highly hygroscopic moisture-absorbent composition 400 may be configured to react (eg, change color) according to the absorbed moisture.

To this end, the indicator coupling member 300 is a replacement time indicator 200 and the first packaging material between the transparent window 320 covering the outermost opening of the packaging material 100H, the transparent window 320 and the first packaging material 100_1. (100_1) between the first fixing frame 310, the highly hygroscopic moisture-proof composition 400 and the first packaging material 100_1, the replacement time indicator 200 and the second fixing frame fixing the first packaging material 100_1 (330).

Here, the first fixed frame 310 includes a first fixed frame opening 310H exposing at least a portion of the replacement time indicator 200 through the transparent window 320, and the second fixed frame 330 is replaced. A second fixing frame opening 330H for contacting at least a partial area of the timing indicator 200 with the highly hygroscopic moisture-proof composition 400 may be included.

The transparent window 320 may be, for example, a transparent film or transparent tape that is flexible but stable against moisture. At least a portion of the replacement time indicator 200 exposed by the first fixing frame opening 310H may be bonded to the transparent window 320 .

The outer edge of the first fixed frame 310 is bonded to the outer surface area of the first packaging material 100_1 surrounding the packaging opening 100H, and the inner edge of the first fixed frame 310 is the replacement time indicator 200 It can be bonded to the outer surface edge area of. The first fixing frame 310 may serve to more stably seal the packaging opening 100H between the transparent window 320 and the replacement time indicator 200 .

The outer edge of the second fixed frame 330 is bonded to the inner surface area of the first packaging material 100_1 surrounding the packaging opening 100H, and the inner edge of the second fixed frame 310 is the replacement time indicator 200 It can be bonded to the inner side edge area of the. The second fixing frame 330 plays a role of fixing and coupling the replacement time indicator 200 to the packaging opening 100H more stably. It may serve to make some areas come into contact with the highly hygroscopic moisture-proof composition 400.

5 is an exploded perspective view illustratively shown to explain a highly hygroscopic desiccant having a replacement time indicator according to some other embodiments of the present invention, and FIG. 6 illustrates the highly hygroscopic desiccant having the replacement time indicator. It is a cross-sectional view shown as an example to do.

5 and 6, the highly hygroscopic desiccant 1' is provided on one side of the highly hygroscopic desiccant composition 400, the packaging material 100' for sealing the highly hygroscopic desiccant composition 400, and the packaging material 100'. The replacement time indicator 200' and a transparent window 320' covering the replacement time indicator 200' from the outside of the packaging material 100 may be included.

Unlike the highly hygroscopic desiccant 1 described with reference to FIGS. 1 to 3 in which a replacement time indicator 200 prepared separately from the packaging 100 is coupled to the packaging 100, the highly hygroscopic desiccant 1' is a packaging material. (100') and an integrated replacement timing indicator (200').

More specifically, the first and second packaging materials 100_1' and 100_2' do not have the packaging opening 100H described with reference to FIGS. 1 to 3, and the replacement time indicator 200' is the first packaging material. It can be formed by directly adsorbing (application or coating) an indicator composition on a partial area of (100_1').

At this time, the transparent window 320' allows the replacement time indicator 200' to perform an accurate indicating function according to the internal humidity (that is, the humidity of the highly hygroscopic moisture-proof composition inside the packaging) without being affected by external humidity. ) is preferably provided so as to completely cover the area of the packaging material on which the replacement time indicator 200' is formed.

In some embodiments, the indicator composition may be cobalt chloride, methyl violet, or cobalt II bromide diluted in a water-soluble solvent similar to the above, but is not limited thereto.

The highly hygroscopic moisture-proof composition 400 may include a deliquescent material, a super absorbent polymer (SAP), a PH control material, starch, a preservative, and an antibacterial material.

In the highly hygroscopic moisture-proof composition 400, the deliquescent material is about 60% to 70% (preferably, about 65% to 70%), and the superabsorbent polymer is about 10% to 20% (preferably, about 15%). % to 20%), the PH adjusting material is about 1% to 10% (preferably, about 3% to 7%), and the starch is about 3% to 15% (preferably, about 10% to 14%) ), 1% to 10% (preferably, about 3% to 7%) of the preservative, and about 2% to 12% (preferably, about 5% to 9%) of the antimicrobial substance may be included.

The deliquescent material is, for example, at least one selected from LiCl, NaCl, KCl, MgCl ₂ , CaCl ₂ , ZnCl ₂ , NaOH, KOH, K ₂ CO ₃ , KH ₂ PO ₄ , KMgCl ₃ 6H ₂ O, and LiBr. can be material. Preferably, the deliquescent material may be at least one material selected from MgCl ₂ and CaCl ₂ . More preferably, the deliquescent material includes MgCl ₂ and CaCl ₂ , and the MgCl ₂ and CaCl ₂ may be included in a weight ratio of about 1.5:1 to 2.5:1, preferably about 2:1.

The PH adjusting material may be, for example, any one of a hydroxide such as Na(OH) composed of an element and negatively charged hydroxide ion (OH-) or a chloride such as NaCl ₂ composed of chlorine and other elements. Preferably, the PH adjusting material may be at least one material selected from Na(OH) and NaCl ₂ . More preferably, the PH adjusting material may be Na (OH).

Meanwhile, the weight ratio of the super absorbent polymer and the PH adjusting material included in the highly hygroscopic moisture barrier composition 400 may be approximately 2.5:1 to 3.5:1, preferably about 3:1. The superabsorbent polymer may be selected from, for example, acrylic acid crosslinked polymers, acrylamide crosslinked polymers, copolymer polymers in which acrylic acid and acrylamide are weakly crosslinked, starch proppolymers, crosslinked starch derivatives, and cellulose derivatives. Not limited to this.

The starch may be, for example, at least one selected from rice starch, wheat starch, corn starch, potato starch, and tapioca. Preferably, the starch may be corn starch. Since the starch serves as a coagulant, it interacts with other components such as the deliquescent material and the superabsorbent polymer to agglomerate them well, thereby enhancing the dehumidifying effect.

On the other hand, a preservative may be included in the highly hygroscopic moisture-proof composition 400 to prevent corruption of the starch. The preservative may be ascorbic acid, tocopherol, nitrite, benzoic acid (benzoic acid), sorbic acid, citric acid, sodium citrate, or a synthetic preservative, but is not limited thereto. The weight ratio of the starch and the preservative contained in the highly hygroscopic moisture barrier composition 400 may be approximately 1:1 to 5:1, preferably approximately 1.5:1 to 3.5:1.

The antimicrobial material may include, for example, metal nanoparticles and/or inorganic metal antimicrobial agents. Preferably, the antimicrobial material may be at least one material selected from CaO and silver nanopowder. More preferably, the antibacterial material includes CaO and silver nano-powder, and the CaO and the silver nano-powder may be included in a weight ratio of about 2:1 to 3:1, preferably about 2.5:1.

Exemplary embodiments are described in more detail through the following Examples and Comparative Examples. The following examples are intended to make the present invention more clearly and easily understood, and the scope of the present invention is not limited by these examples.

Example 1

40 g of MgCl ₂ , 20 g of CaCl ₂ , 15 g of super absorbent polymer, 5 g of NaOH, 10 g of cornstarch, 3 g of preservative, 5 g of CaO, and 2 g of silver nanopowder were prepared as 100 g of a highly hygroscopic moisture barrier composition.

Example 2

Excluding NaOH in Example 1, 100 g of a highly hygroscopic moisture barrier composition containing 40 g of MgCl ₂ , 20 g of CaCl ₂ , 20 g of super absorbent polymer, 10 g of corn starch, 3 g of preservative, 5 g of CaO, and 2 g of silver nano powder was prepared.

Example 3

20 g of MgCl ₂ and 40 g of CaCl ₂ , 20 g of super absorbent polymer, 8 g of NaOH, 3 g of cornstarch, 2 g of preservative, 5 g of CaO, and 2 g of silver nano powder were prepared as 100 g of a highly hygroscopic moisture barrier composition.

Comparative Example 1

A commercially available silica gel product (type B silica gel) as a desiccant was used without processing after opening.

Experimental Example 1: Evaluation of moisture absorption and moisturizing properties

In the moisture absorption test, the highly hygroscopic desiccant prepared in Examples 1 to 3 and the desiccant of Comparative Example 1 were placed in each desiccator adjusted to a temperature of 50 ° C and a relative humidity of 90% and stored for 550 hours. Then, the moisture absorption amount was confirmed by measuring the weight of the desiccant. The desiccant compositions of Examples and Comparative were contained in the same packaging having a porosity of about 2000 CU in Coresta units.

Moisture retention test was performed to confirm the extent to which the moisture absorbed in the examples leaked into the liquid phase, and the moisture retention test was performed for the highly hygroscopic desiccant prepared in Examples 1 to 3 and Comparative Example 1 in a moisture absorption state in which the moisture absorption test was completed. After storing the desiccant for 72 hours at a temperature of 30° C. and a relative humidity of 50%, the weight of the desiccant was measured.

The results of the moisture absorption test and moisture retention test are shown in Table 1 below, and the moisture absorption (%) and moisture content (%) of Table 1 were calculated according to the following formula.

Moisture absorption (%) = weight of water absorbed (g) / 100 g of desiccant

Moisturizing amount (%) = (weight of absorbed water (g) - weight of liquefied leaked water (g)) / weight of absorbed water (g)

division Moisture absorption (%) Moisturizing amount (%) Example 1 445 99.2 Example 2 430 86.3 Example 3 411 86.5 Comparative Example 1 70 50.0

As shown in Table 1, the dehumidifying effect was observed in all of the desiccants according to Examples 1 to 3 and Comparative Example 1, and it was confirmed that there was a numerical difference in moisture absorption and moisturizing amount for each example. In particular, it was confirmed that Example 1 containing 40 g of MgCl ₂ , 20 g of CaCl ₂ , 15 g of superabsorbent polymer, 5 g of NaOH, 10 g of corn starch, 3 g of preservative, 5 g of CaO, and 2 g of silver nanopowder had the best moisture absorption and moisturizing ability. Referring to the results of each case, in Example 1 and Example 2, where there was a difference in the presence or absence of NaOH, the difference in moisture absorption capacity was not significant, but the difference in moisture absorption capacity was prominent, and through this, the moisture absorption of the superabsorbent polymer After that, it was confirmed that the moisturizing ability was affected by the presence or absence of sodium hydroxide. In addition, when looking at the results of Examples 1 and 3 in which all components were the same but the content ratio was different, it was confirmed that there was a difference in moisture absorption and moisturizing ability depending on the composition ratio of each component, among which moisture absorption ability The difference in is judged to be due to the difference in the composition ratio of MgCl ₂ and CaCl ₂ , and the difference in moisturizing ability is not only the difference in the composition ratio of MgCl ₂ and CaCl ₂ , but also the PH value of the entire material at the time of water absorption, and the composition ratio of super absorbent polymer and corn starch It is judged to be due to the difference.

Experimental Example 2: Evaluation of antibacterial properties

An antibacterial test was conducted on the highly hygroscopic desiccant prepared in Example 1. Since the highly hygroscopic desiccant of Examples 2 and 3 contained the same amount of CaO and silver nanopowder as in Example 1, the antibacterial test was omitted.

test strain contact time Number of bacteria (CFU/mL) Sterilization power (%) control test solution test solution Escherichia coli
(E. coli) Early 3 x 10^6 99.9 1 hours 3 x 10^6 < 100 Staphylococcus aureus
(Staphylococcus aureus) Early 2 x 10^6 99.9 1 hours 2 x 10^6 < 100 Salmonella typhimurium
(Vithoid bacillus) Early 2 x 10^6 99.9 1 hours 2 x 10^6 < 100 Pseudomonas aeruginosa
(Pseudomonas aeruginosa) Early 4 x 10^6 99.9 1 hours 4 x 10^6 < 100

The antibacterial test results are shown in Table 2, and as shown in Table 2, it can be seen that the highly hygroscopic desiccant according to Example 1 has antibacterial performance. It can be accommodated inside, and even if the highly hygroscopic moisture-proof composition has the same composition, a difference in moisture-proof ability may occur depending on the packaging material.

Accordingly, the present invention intends to additionally propose a packaging material for a high moisture absorption moisture barrier suitable for the high moisture absorption moisture barrier composition of the present invention to maximize the moisture absorption and moisturizing ability of the above-described moisture barrier composition.

Example 4

The highly hygroscopic desiccant of Example 1 contained in a packaging material having a porosity of about 50 CU was used.

Example 5

The highly hygroscopic desiccant of Example 1 contained in a packaging material having a porosity of about 2000 CU was used.

Example 6

The highly hygroscopic desiccant of Example 1 contained in a packaging material having a porosity of about 10000 CU was used.

Example 7

The highly hygroscopic desiccant of Example 3 contained in a packaging material having a porosity of about 2000 CU was used.

Example 8

The highly hygroscopic desiccant of Example 3 contained in a packaging material having a porosity of about 10000 CU was used.

Experimental Example 3: Evaluation of moisture absorption and moisturizing properties according to packaging material porosity

The experiment for evaluating the moisture absorption and moisture retention characteristics according to the porosity of the packaging material was conducted under the same conditions and method as the moisture absorption and moisture retention test conducted in Experimental Example 1.

division Moisture absorption (%) Moisturizing amount (%) Example 4 381 99.9 Example 5 445 99.2 Example 6 466 94.5 Example 7 411 86.5 Example 8 440 81.0

As shown in Table 3, it was confirmed that there was a significant difference in the moisture absorption and moisturizing ability of the highly hygroscopic desiccant according to the porosity of the packaging material. In Examples 4 to 7, the moisture absorption capacity tended to increase as the porosity of the packaging material increased, whereas the moisture absorption capacity generally showed a tendency to decrease. The porosity of the packaging material in consideration of the composition of the highly hygroscopic desiccant in order to improve the moisture absorbing and dehumidifying ability, which has been generalized through the above experiments, is shown in Equation 1 below.

(Where P is the porosity (unit: CU, Coresta) of the packaging material, ST_W is the weight of the starch, SAP_W is the weight of the superabsorbent polymer, and PH_W is the weight of the PH adjusting material.)

Figure 7 is a test report of the mass change rate of the highly hygroscopic desiccant according to some embodiments of the present invention tested by the FITI Testing & Research Institute, and Figs. 11 and 12 are test reports of the deodorization test of the highly hygroscopic desiccant at the Korea Far Infrared Application Evaluation Institute. Referring to Figures 7 to 12, it can be confirmed the moisture barrier, deodorization and antibacterial effect of the highly hygroscopic desiccant of the present invention.

Those skilled in the art related to the present embodiment will be able to understand that it may be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a limiting sense. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

Claims (9)

High hygroscopic moisture barrier composition;
A packaging material for sealing the highly hygroscopic moisture-proof composition;
a replacement time indicator provided on one side of the packaging material; and
An indicator coupling member coupling the replacement time indicator to one region of the packaging material;
The replacement time indicator shows a first color when the remaining moisture absorption capacity of the highly hygroscopic moisture barrier composition is greater than or equal to a reference value, and when the remaining moisture absorption capacity is lowered below the standard value as the highly hygroscopic moisture barrier composition absorbs moisture from the outside. The first color is changed to a second color different from the first color,
The replacement timing indicator is cobalt chloride paper, methyl violet paper, or cobalt(II) bromide (Cobr2) paper,
When the replacement time indicator is the cobalt chloride paper, the first color is blue and the second color is pink, and when the replacement time indicator is the methyl violet paper, the first color is orange and the second color is green However, when the replacement time indicator is the cobalt bromide II paper, the first color is green and the second color is pink,
The packaging material may include: a first packaging material covering one side of the highly hygroscopic moisture-proof composition; And a second packaging material covering the other side opposite to the one side of the highly hygroscopic moisture-proof composition, the edge of which is integrally sealed with the first packaging material to seal the highly hygroscopic moisture-proof composition with the outside,
The first packaging material includes a packaging opening that exposes at least a portion of the replacement time indicator to the outside of the packaging material,
The indicator coupling member may include a transparent window covering the outermost opening of the packaging material; a first fixing frame for fixing the replacement time indicator and the first packaging material between the transparent window and the first packaging material; And a second fixing frame for fixing the replacement time indicator and the first packaging material between the highly hygroscopic moisture-proof composition and the first packaging material;
The highly hygroscopic moisture-proof composition comprises 60 to 70% by weight of a deliquescent material composed of MgCl ₂ and CaCl ₂ based on the total weight of the highly hygroscopic moisture-proof composition; 10 to 20% by weight of super absorbent polymer (SAP); 1 to 10% by weight of a PH regulator composed of NaOH, 3 to 15% by weight of corn starch; 1 to 10% by weight of a preservative; and 2 to 12% by weight of an antibacterial substance composed of CaO and silver nanopowder, wherein the CaO and the silver nanopowder have a weight ratio of 2:1 to 3:1. Highly hygroscopic desiccant.
delete delete delete delete delete According to claim 1,
The first fixing frame includes a first fixing frame opening exposing at least a portion of the replacement time indicator to the transparent window;
The second fixing frame includes a second fixing frame opening for bringing at least a portion of the replacement time indicator into contact with the highly hygroscopic moisture-proof composition.
delete According to claim 1,
The packaging material is formed of a porous material that absorbs moisture from the outside but does not release the high moisture absorption composition inside to the outside, characterized in that, the high moisture absorption desiccant equipped with a replacement time indicator.

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