KR20220125386A - Super absorbent desiccant including replacement moment indicator - Google Patents

Abstract

A 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. The present invention can inhibit bacterial growth even in a humid environment.

Description

SUPER ABSORBENT DESICCANT INCLUDING REPLACEMENT MOMENT INDICATOR including replacement time indicator

The present invention relates to a highly hygroscopic desiccant, and more particularly, to a highly hygroscopic desiccant having an indicator indicating the replacement time of the desiccant.

Desiccant refers to a material that can directly absorb water vapor from the surrounding air because it has a strong affinity for moisture, and is also called a desiccant, desiccant, and desiccant. There are various types of desiccant, 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.

Conventional dehumidification products that absorb moisture and store the dehumidifying composition in a liquid state inside a transparent container have the advantage of being able to visually observe the replacement time depending on the degree to which the dehumidifying composition has changed to liquid. Not only does the moisture absorption rate fall, but it also includes a liquid storage container made of plastic, etc., and a moisture absorption sealing member to prevent liquid leakage after absorbing moisture. There is an environment-friendly disadvantage, and accordingly, the volume is reduced and the moisture absorption ability is excellent, but the replacement time is also required to develop a high moisture absorption desiccant that can be easily observed with the naked eye.

The present invention has been devised to solve the above-described problems, and an object of the present invention is to provide a highly hygroscopic desiccant that has excellent moisture absorption and can be easily observed with the naked eye at the time of replacement depending on the degree of moisture absorption.

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 following description.

A highly hygroscopic desiccant with a replacement time indicator according to some embodiments of the present invention 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.

In some embodiments, the replacement time indicator shows a first color when the residual moisture absorption capacity of the highly hygroscopic moisture-proof composition is equal to or greater than a reference value, and the residual moisture absorption as the high-hygroscopic moisture-proof composition absorbs external moisture When the intensity is lowered to less 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 (Cobalt(II) bromide; Cobr2) paper, and when the replacement time indicator is the cobalt chloride paper, the first color is blue and the second 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, and 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 period indicator is characterized in that the cardboard is coated with cobalt chloride, methyl violet or cobalt II bromide 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 that covers the other side opposite to the one side of the highly hygroscopic moisture absorption composition, and an edge is integrally sealed with the first packaging material to seal the highly hygroscopic moisture absorption composition from the outside; The highly hygroscopic desiccant further comprises an indicator coupling member for coupling the replacement timing indicator to one region of the first packaging material.

On the other hand, the first packaging material includes a packaging material opening for exposing at least a portion of the replacement time indicator to the outside of the packaging material, the indicator coupling member, a transparent window covering the packaging material opening at the outermost; 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 fixed frame includes a first fixed frame opening for exposing at least a partial area of the replacement time indicator to the transparent window, and the second fixed frame includes at least a partial area of the replacement time indicator with the high hygroscopicity It may include a second fixing frame opening to be in contact with 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 adjusting 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 leave the high moisture absorption moisture-proof composition inside 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 the replacement time indicator provided in the highly hygroscopic desiccant, and accordingly, the highly hygroscopic desiccant can be more easily maintained. be able to

In addition, the highly hygroscopic moisture-proof compositions according to the embodiments of the present invention include deliquescent substances such as MgCl ₂ , CaCl ₂ , superabsorbent polymer, PH control substances such as NaOH, starch, and preservatives, and have excellent moisture absorption ability and absorption at the same time It is possible to manufacture a highly hygroscopic desiccant with excellent moisturizing ability to prevent the moisture from leaking into the liquid phase.

Furthermore, since the highly hygroscopic moisture-proof composition contains antibacterial substances such as CaO and silver nano powder, it has dehumidification and antibacterial performance at the same time, so that it is possible to inhibit bacterial growth even in a humid environment.

1 is a perspective view schematically illustrating a highly absorbent desiccant including a replacement time indicator according to some embodiments of the present invention.
2 is an exploded perspective view exemplarily 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 exemplarily 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 view showing the use of the highly hygroscopic desiccant according to some embodiments of the present invention by way of example.
5 is an exploded perspective view exemplarily shown to explain a highly hygroscopic desiccant having a replacement time indicator according to some other embodiments of the present invention.
6 is a cross-sectional view exemplarily shown to explain a highly absorbent desiccant having a replacement time indicator according to some other embodiments of the present invention.
7 is a test report showing the mass change rate of the antibacterial and desiccant applicable to the composition pack of the present invention tested by the FITI testing institute.
8 to 10 are test reports of the antibacterial test of the antibacterial and desiccant applicable to the composition pack of the present invention at the Korea Far Infrared Application Evaluation Institute.
11 to 12 are test reports of the deodorization test of the antibacterial and desiccant applicable to the composition pack of the present invention at the Korea Far Infrared Application Evaluation Institute.

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 apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but may be implemented in various different forms, and only these embodiments make the publication of the present invention complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

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

Also, in the present specification, the singular form may also include a plural form unless otherwise specified in the text. As used herein, “comprises” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

1 is a perspective view schematically showing a highly hygroscopic desiccant including a replacement time indicator according to some embodiments of the present invention, and FIG. 2 is an exploded perspective view for explaining the coupling relationship of the replacement time indicator, FIG. 3 is It is a cross-sectional view for explaining the coupling relationship of the replacement time indicator, and FIG. 4 is a view showing the state of use of the highly hygroscopic desiccant.

1 to 4, the highly hygroscopic desiccant (1) is a highly hygroscopic moisture-absorbing composition 400, a packaging material for sealing the highly hygroscopic moisture-absorbing composition 400, 100, a replacement time provided on one side of the packaging material 100 It may include an indicator coupling member 300 for coupling the indicator 200 and the replacement timing indicator 200 to one side of the packaging material 100 .

The packaging material 100 may include a first packaging material 100_1 covering the highly hygroscopic moisture-proof composition 400 from one side and a second packaging material 100_2 covering the highly hygroscopic moisture-proof composition 400 from the other side. The edges of the first packaging material 100_1 and the second packaging material 100_2 are integrally sealed as shown in FIG. 1 to seal the highly hygroscopic moisture-proof composition 400 from 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 and prevents the high moisture absorption moisture-proof composition 400 from being separated to the outside.

The replacement time indicator 200 may serve to inform the user of the replacement time (or regeneration time) of the highly absorbent desiccant 1 with a color or the like. That is, the user can easily check whether the expiration date of the high hygroscopic desiccant 1 has expired by visually observing the state of the replacement timing indicator 200 . The user can use the new highly hygroscopic desiccant (1) after discarding the existing highly hygroscopic desiccant (1) according to the state of the replacement time indicator 200, or reuse the existing highly hygroscopic desiccant (1) after drying.

In other words, the replacement time indicator 200 may serve to visually express the residual moisture absorption capacity of the highly hygroscopic moisture-absorbing composition 400 included in the highly hygroscopic desiccant 1 . As an example, the replacement time indicator 200 shows a first color when the residual moisture absorption capacity of the highly hygroscopic moisture-proof composition 400 is equal to or greater than the reference value (that is, when the life as a desiccant is sufficiently left), and the high hygroscopic moisture-absorbing moisture-proof composition 400 is external When the residual moisture absorption capacity is lower than the reference value as it absorbs moisture (that is, when the life of the desiccant as a desiccant has expired or is near), the second color changed from the first color may be exhibited.

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 (refer to (a) of FIG. 4) and the second The two colors 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. 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 bromide II diluted in a water-soluble solvent, in which case the first color may be green and the second color may be pink. have.

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 chol, 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 has durability against repeated moisture absorption and discharge. For example, the paper may be cardboard, fixed paper, back paper, margol paper, white paper, upper paper, pine paper, pine paper, or laminated paper composed of two or more papers selected from these, 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 fixedly couple the replacement timing indicator 200 to one region of the first packaging material 100_1 .

Specifically, the first packaging material 100_1 includes a packaging material opening 100H exposing at least a partial area 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 , the other side so that the user can observe the state (eg, color) of the replacement time indicator 200 through the transparent window 320 . is in contact with the highly hygroscopic moisture-proof composition 400 may be configured to react (eg, change color) according to the moisture absorbed by the highly hygroscopic moisture-proof composition 400 .

To this end, the indicator coupling member 300 is replaced between the transparent window 320, the transparent window 320, and the first packaging material 100_1 covering the packaging material opening 100H from the outermost portion, the replacement timing indicator 200 and the first packaging material A second fixing frame for fixing the replacement timing indicator 200 and the first packaging material 100_1 between the first fixing frame 310 for fixing the 100_1, the highly hygroscopic moisture-proof composition 400 and the first packaging material 100_1 330 may be included.

Here, the first fixed frame 310 includes a first fixed frame opening 310H exposing at least a partial area of the replacement time indicator 200 to the transparent window 320 , and the second fixed frame 330 is replaced It may include a second fixing frame opening (330H) to contact at least a partial area of the timing indicator (200) with the highly hygroscopic moisture-proof composition (400).

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

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

The outer edge of the second fixing frame 330 is adhered to the inner surface area of the first packaging material 100_1 surrounding the packaging material opening 100H, and the inner edge of the second fixing frame 310 is a replacement time indicator 200 . may be adhered to the inner side edge region of the The second fixed frame 330 serves to more stably fix the replacement time indicator 200 to the packaging material opening 100H, but at least of the replacement time indicator 200 through the second fixed frame opening 330H. It may serve to allow some areas to come into contact with the highly hygroscopic moisture-proof composition 400 .

5 is an exploded perspective view exemplarily shown to explain a high moisture absorption desiccant provided with a replacement time indicator according to some other embodiments of the present invention, and FIG. 6 is an exploded perspective view illustrating the high moisture absorption desiccant provided with the replacement time indicator It is a cross-sectional view illustratively shown in order to

5 to 6 , the highly hygroscopic desiccant 1 ′ is provided on one side of the highly hygroscopic moisture-absorbing composition 400 , the packaging material 100 ′ for sealing the highly hygroscopic moisture-proof composition 400 , and the packaging material 100 ′). The replacement time indicator 200 ′ and the replacement time indicator 200 ′ may include a transparent window 320 ′ covering the outside of the packaging material 100 .

The highly hygroscopic desiccant (1 ') is different from the highly hygroscopic desiccant (1) described with reference to FIGS. A replacement time indicator 200' integrated with 100' is provided.

More specifically, the first and second packaging materials 100_1 ′ and 100_2 ′ do not have the packaging material opening 100H described with reference to FIGS. 1 to 3 , and the replacement timing indicator 200 ′ is the first packaging material. It may be formed by directly adsorbing (applying or coating, etc.) the indicator composition to a partial region of (100_1').

At this time, the transparent window 320' so that the replacement time indicator 200' is not affected by external humidity and performs an accurate indicating function according to the internal humidity (that is, the humidity of the highly hygroscopic moisture-proof composition inside the packaging material). ) is preferably provided so as to completely cover the area of the packaging material in which the replacement time indicator 200' is formed.

In some embodiments, the indicator composition may be cobalt chloride, methyl violet, or cobalt bromide II diluted in a water-soluble solvent similar to that described 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 adjusting 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%), about 1% to 10% of the PH modifier (preferably, about 3% to 7%), and about 3% to 15% of the starch (preferably, about 10% to 14%) ), 1% to 10% of the preservative (preferably, about 3% to 7%), and about 2% to 12% of the antibacterial material (preferably, about 5% to 9%) 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 It may be a substance. Preferably, the deliquescent material may be at least one material selected from MgCl ₂ and CaCl ₂ . More preferably, the deliquescent material may include 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, a hydroxide such as Na(OH) composed of an element and a negatively charged hydroxide ion (OH-), or a chloride such as NaCl ₂ composed of chlorine and other elements. Preferably, the PH control material may be at least one material selected from Na(OH) and NaCl ₂ . More preferably, the PH adjusting material may be Na(OH).

On the other hand, the weight ratio of the superabsorbent polymer and the PH adjusting material included in the highly hygroscopic moisture-proof composition 400 may be about 2.5:1 to 3.5:1, preferably about 3:1. The superabsorbent polymer may be selected from, for example, acrylic acid crosslinked polymer, acrylamide crosslinked polymer, acrylic acid and acrylamide crosslinked copolymer polymer, starch proppolymer, crosslinked starch derivative, cellulose derivative, etc. It is not limited thereto.

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 acts as a coagulant, it interacts with other components such as the deliquescent material and the superabsorbent polymer to agglomerate well, thereby enhancing the dehumidifying effect.

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

The antibacterial material may include, for example, metal nanoparticles and/or an inorganic metal antibacterial agent. Preferably, the antibacterial material may be at least one material selected from CaO and silver nano powder. More preferably, the antibacterial material may include CaO and nano-silver powder, and the CaO and nano-silver 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 provided so that the present invention can be more clearly and easily understood, and the scope of the present invention is not limited by these examples.

Example 1

MgCl ₂ 40g, CaCl2 20g _, super absorbent polymer 15g, NaOH 5g, cornstarch 10g, preservative 3g, CaO 5g, and 100g of a highly absorbent moisture-proof composition including 2g of silver nano powder was prepared.

Example 2

Except NaOH in Example 1, MgCl ₂ 40g, CaCl ₂ 20g, superabsorbent polymer 20g, corn starch 10g, preservative 3g, CaO 5g, and 100g of a highly absorbent moisture-proof composition comprising 2g of silver nano powder was prepared.

Example 3

MgCl ₂ 20g and CaCl ₂ 40g, super absorbent polymer 20g, NaOH 8g, cornstarch 3g, preservative 2g, CaO 5g, and 100g of a highly absorbent moisture-proof composition containing 2g of silver nano powder was prepared.

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

For 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 controlled at a temperature of 50° C. and a relative humidity of 90% and stored for 550 hours. After measuring the weight of the desiccant, the amount of moisture absorption was confirmed. The desiccant compositions of Examples and Comparative Examples were contained in the same packaging having a porosity of about 2000 CU in Coresta units.

The moisturizing test was performed to confirm the degree of leakage of the moisture absorbed in the Examples into the liquid phase, and the moisturizing test was performed with the highly hygroscopic desiccant and Comparative Example 1 prepared in Examples 1 to 3 of the moisture absorption state in which the moisture absorption test was completed. After the desiccant was stored 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 moisturizing test are shown in Table 1 below, and the moisture absorption (%) and moisture content (%) in Table 1 were calculated as follows.

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

Moisture content (%) = (weight of absorbed water (g)-weight of liquefied leaked water (g))/weight of absorbed water (g)

division Moisture absorption (%) Moisture 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, both of the desiccants according to Examples 1 to 3 and Comparative Example 1 showed a dehumidifying effect, and it was confirmed that there were numerical differences in the amount of moisture absorption and moisture content for each Example. In particular, it was confirmed that the moisture absorption and moisturizing ability of 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 nano powder was the best. Referring to the results of each example, in Examples 1 and 2 where there was a difference in the presence or absence of NaOH, the difference in moisture absorption capacity did not show a significant value, but the difference in moisture absorption ability was prominent, and through this, the moisture absorption of the superabsorbent polymer It was confirmed that the moisturizing ability was affected by the presence or absence of sodium hydroxide. In addition, when looking at the results in Examples 1 and 3 in which all components were the same but the content ratios were different, it was confirmed that differences in moisture absorption and moisturizing ability occurred depending on the composition ratio of each component, among which moisture absorption ability It is judged that the difference is 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 and the composition ratio of the superabsorbent polymer and cornstarch when water is absorbed. It is considered to be due to the difference.

Experimental Example 2: Evaluation of antibacterial properties

An antibacterial test was performed 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 nano powder as in Example 1, the antibacterial test was omitted.

test strain contact time Number of bacteria (CFU/mL) Sterilization (%) 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
(Zutypus 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 results of the antibacterial test 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 may 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 is to further propose a highly hygroscopic desiccant packaging material suitable for the highly hygroscopic desiccant composition of the present invention in order to maximize the moisture absorption and moisturizing ability of the above-described highly hygroscopic 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 the porosity of the packaging material

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

division Moisture absorption (%) Moisture 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 a significant difference appeared 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, as the porosity of the packaging material increased, the moisture absorption ability showed a tendency to increase, whereas the moisture absorption ability showed a tendency to generally decrease. The porosity of the packaging material in consideration of the composition of the highly hygroscopic desiccant in order to improve the moisture absorption and desiccant ability, generalized through the above experiment, is as 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.)

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 Test Research Institute, and FIGS. It is a test report, and FIGS. 11 to 12 are test reports of the deodorization test of the highly hygroscopic desiccant at the Korea Far Infrared Application Evaluation Institute. 7 to 12, the moisture-proof, deodorizing and antibacterial effects of the highly hygroscopic desiccant of the present invention can be confirmed.

Those of ordinary skill in the art related to the present embodiment will understand that it can 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 restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (9)

Highly hygroscopic moisture-proof composition;
a packaging material for sealing the highly hygroscopic moisture-proof composition; and
A highly hygroscopic desiccant with a replacement time indicator, including; a replacement time indicator provided on one side of the packaging material.
The method of claim 1,
The replacement time indicator shows a first color when the residual moisture absorption capacity of the highly hygroscopic moisture-proof composition is greater than or equal to the reference value, and when the high-hygroscopic moisture-absorbing composition absorbs external moisture, the residual moisture absorption is lower than the reference value A highly hygroscopic desiccant with a replacement time indicator, characterized in that the first color is changed to a second color different from the first color.
3. The method of claim 2,
The replacement time indicator is cobalt chloride paper, methyl violet paper, or cobalt bromide II (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.
3. The method of claim 2,
The replacement time indicator is a highly hygroscopic desiccant with a replacement time indicator, characterized in that the cardboard coated with cobalt chloride, methyl violet or cobalt bromide II diluted in a water-soluble solvent.
The method of claim 1,
The packaging material is
a first packaging material covering one side of the highly hygroscopic moisture-proof composition; and
A second packaging material that covers the other side opposite to the one side of the highly hygroscopic moisture-absorbing composition, and the edge is integrally sealed with the first packaging material to seal the highly hygroscopic moisture-proof composition from the outside;
The highly hygroscopic desiccant is a highly hygroscopic desiccant provided with a replacement time indicator, characterized in that it further comprises an indicator coupling member for coupling the replacement time indicator to one region of the first packaging material.
6. The method of claim 5,
The first packaging material includes a packaging material opening for exposing at least a partial area of the replacement time indicator to the outside of the packaging material,
The indicator coupling member,
a transparent window covering the opening of the packaging material from the outermost;
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
and a second fixing frame for fixing the replacement timing indicator and the first packaging material between the highly hygroscopic moisture-proof composition and the first packaging material.
7. The method of claim 6,
The first fixed frame includes a first fixed frame opening for exposing at least a portion of the replacement time indicator to the transparent window,
The second fixed frame is a highly hygroscopic desiccant provided with a replacement time indicator, characterized in that it includes a second fixed frame opening for bringing at least a partial area of the replacement time indicator into contact with the highly hygroscopic moisture-proof composition.
The method of claim 1,
The highly hygroscopic desiccant composition is a deliquescent material, a super absorbent polymer (SAP), a PH control material, starch, a preservative and an antibacterial material.
The method of claim 1,
The packaging material is a highly hygroscopic desiccant with a replacement time indicator, characterized in that it is formed of a porous material that absorbs moisture from the outside but does not leave the highly hygroscopic moisture-proof composition inside to the outside.

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