CA3105123C - Coating solution, environmental humidity regulating article and manufacturing method therefor - Google Patents

Abstract

Provided are a coating solution, an environment humidity adjustment article and a manufacturing method therefor. The coating solution is used for being coated onto a substrate to prepare an environment humidity adjustment article that controls environment humidity at 65 - 75%, and comprises at least one chloride salt and water, wherein the chloride salt is at least one of NaCl, NH4Cl, KCl and MgCl2, and the mass fraction range of the chloride salt in the composition is 12 ~ 29.75%. The manufacturing method comprises the following steps: step 1, formulating a coating solution; and step 2, coating the coating solution onto a substrate, and step 3, performing microwave drying.

Description

Coating solution, environmental humidity regulating article and manufacturing method therefor FIELD OF THE INVENTION
The present invention relates specifically to an environmental humidity adjustment article, a coating solution used for environmental humidity regulating article and manufacturing method therefor.
BACKGROUND OF THE INVENTION
"Humidity" is an important factor that affects product packaging and storage life in all walks of life. Each product requires a reasonable humidity range to store. For example, the storage humidity of cigar products is about 69%. If the environmental humidity is lower than this value, the moisture content in the internal space of cigars will be too low, and the aging of tobacco will be accelerated; if the environmental humidity is higher than this value, it will cause the deterioration of cigars, and then cause the flavor damage of cigars. The storage humidity of some seeds is about 65 ¨
75%. If the environmental humidity is lower than this value, the seeds will be too dry and be moth eaten; if the environmental humidity is higher than this value, the seeds will become hot and moldy and lose their vigor. The humidity of frozen meat and other foods should be maintained between 65% and 75%. If the ambient humidity is lower than this value, the food will dry up; if the ambient humidity is higher than this value, the food will become sticky and slippery, which will promote the growth of bacteria and accelerate the deterioration of food.
In order to regulate the environmental humidity till within range 65%-75%, the common method is to use gel-type humidity regulation articles to regulate the environmental humidity. When using, the humidity regulate gel needs to be pre-balanced in a constant temperature and humidity chamber, and then the balanced humidity regulate gel is placed into the target environment. The balanced humidity regulate gel can absorb water vapor (absorb moisture) when the target environmental humidity is too high, and release water vapor (release moisture) when the humidity is too low, so that the humidity of the target environment is maintained within a certain range.
However, the above-mentioned humidity regulate gel has the following shortcomings: (1) the humidity regulate accuracy is poor so that the humidity of the target environment may fluctuate in a large range (for example, within the range of 10%) during use, and it is difficult to maintain a fixed humidity; (2) the production process consumes a lot of energy and produces a lot of waste water, which is not conducive to environmental protection; (3) the user needs to prepare a temperature and humidity chamber for the pre-balance of such a humidity regulate gel so the use cost is high, meanwhile the temperature and humidity chamber is volume-limited and it takes a long time to reach the humidity balance, which makes the gel inconvenient for use.

Date Recue/Date Received 2020-12-24 SUMMARY OF THE INVENTION
The present invention aims the above problems, and provides an environmental humidity regulating article with cheap raw materials, good humidity regulates performance, energy saving, and convenient use and a manufacturing method therefor with simple process. The present invention also provides a coating solution (i.e., coating liquid) for preparing an environmental humidity regulating article in the preparation method therefor.
The present invention provides a coating solution, used for coated onto a substrate to prepare an environmental humidity regulating article that controls the environmental humidity at 65-75%, characterized by comprising: at least one chloride salt and water, wherein the chloride salt is at least one of NaCl, NH4C1, KC1 and MgCl2, the weight percentage of the chloride salt in the composition is 12%-29.75%.
The present invention also provides a manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, characterized by including the following steps:
step 1, prepare a coating solution, at least one chlorinated salt and water are prepared as coating solution at no lower than 40 C;
step 2, coat the coating solution onto a substrate;
coat the substrate with the coating solution of a coating speed of 1-15m/s at room temperature, and the coating solution loaded onto the substrate is 0.81-1.11 g per cubic centimeter;
step 3, microwave drying;
microwave drying is continuously performed on the substrate loaded with the coating solution, so that the substrate is loaded with a humidity regulating composition by 0.54 g ¨0.74 g per cubic centimeter;
wherein the chloride salt is at least one of NaCl, NH4C1, KC1 and MgCl2.
the weight percentage of the chloride salt in the coating solution is 12%-29.75%, the weight percentage of the chloride salt in the humidity regulating composition is 18%-44.6%.
in step3, the condition of the microwave drying is that the substrate is dried at a speed of 1¨ 3 m/min at 15-25 KW.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, wherein the humidity regulating composition contains one of the chloride salts, the chloride salt is NaCl, the weight percentage of the chloride salt in the coating solution is 12%-26.8%, the weight percentage of the chloride salt in the humidity regulating composition is 18%-40.2%.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, wherein the humidity regulating composition contains two of the chloride salts, one of the chloride salts is any one of KC1 and NH4C1, and the other kind of the chloride salt is NaCl, the weight percentage of the NaCl in the coating solution is 7%-16%, the weight

2 Date Regue/Date Received 2020-12-24 percentage of the NH4C1 in the coating solution is 5%-13.75%, the weight percentage of the KC1 in the coating solution is 2%-10.5%, the weight percentage of the NaCl in the humidity regulating composition is 10.5%-24%, the weight percentage of the NH4C1 in the humidity regulating composition is 7.5%-20.6%, the weight percentage of the KC1 in the humidity regulating composition is 3%-15.75%.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, wherein the weight percentage of the NaCl in the coating solution is 11%-15%, the weight percentage of the NH4C1 in the coating solution is 8%-12%, the weight percentage of the KC I in the coating solution is 3%-8%, the weight percentage of the NaC1 in the humidity regulating composition is 16.5%-22.5%, the weight percentage of the in the humidity regulating composition is 12%-18%, the weight percentage of the KC1 in the humidity regulating composition is 4.5%-12%.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, wherein the weight percentage of the NaCl in the coating solution is 14%-14.8%, the weight percentage of the NH4C1 in the coating solution is 10%-11.4%, the weight percentage of the KC1 in the coating solution is 5%-7.4%, the weight percentage of the NaCl in the humidity regulating composition is 21%-22.6%, the weight percentage of the NH4C1 in the humidity regulating composition is 15%-17.1%, the weight percentage of the KC1 in the humidity regulating composition is 7.5%-11.1%.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, wherein the humidity regulating composition contains two of the chloride salts, one of the chloride salts is KC1, and the other kind of the chloride salt is MgCl2, the weight percentage of the MgCl2 in the coating solution is 6%-17%, the weight percentage of the KC1 in the coating solution is 3%-15%, the total weight percentage of the chloride salts in the coating solution is 12%-29.75%, the weight percentage of the MgCl2 in the humidity regulating composition is 9%-25.5%, the weight percentage of the KC1 in the humidity regulating composition is 4.5%-22.5%, the total weight percentage of the chloride salts in the humidity regulating composition is 18%-44.6%.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, step4, cut the substrate, cut the substrate into a predetermined size, the material of the substrate is any one of paper material, cotton cloth, chemical fiber material, non-woven fabric, felt, porous plastic, and mineral substrate.
The manufacturing method of the environment humidity regulating article provided by the present invention could be further characterized by that, step5, package, pack the substrate loaded with the coating solution with a package bag.
Also the present invention provides an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, characterized by being manufactured by a manufacturing method according anyone of above-mentioned manufacturing methods.

3 Date Recue/Date Received 2020-12-24 THE EFFECT OF THE PRESENT INVENTION
According to the coating solution, the environmental humidity regulating article and the manufacturing method therefor related to the present invention, because the weight percentage of the chloride salt in the coating solution ranges from 12%-29.75%, the weight percentage of the chloride salt in the humidity control composition is 18%-44.6%, so the environmental humidity regulating articles can regulate the environmental humidity within 65%-75%, and the humidity regulating articles of different compositions within this range can accurately maintain the target environment at the predetermined humidity.
Not only that, the environmental humidity regulating articles only contain common chloride salts, and the composition prepared using these chloride salts is not only low in cost, but also safe to the manufacture workers, the environment and the object to be preserved. Moreover, the environmental humidity regulating article manufactured by the manufacturing method of the present invention is still friendly to the natural environment after being discarded, and can be naturally decomposed without causing secondary pollution.
The manufacturing method in the present invention use microwave drying for dehydration. Compared with the traditional hot air drying, the microwave drying can uniformly dry to each substrate leading a precise dehydration, making the dehydration amount easy to control and the humidity regulating articles have the advantages of stable performance and faster humidity adjustment.
BREIF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a linear relationship diagram between the set speed of the equipment and the dehydration amount in the embodiment 9 of the present invention.
Fig. 2 is the dehydration situation in the hot air oven of comparative embodiment 1 of the present invention Fig. 3 is a photograph of the substrate coated with the coating solution in the comparative embodiment 1 after being dried in the hot air oven.
Fig.4 is a photograph of a substrate coated with the coating solution after microwave drying in embodiment 10 of the present invention Fig. 5 is an electron microscope photograph of the substrate of Fig. 4 Fig. 6 is a humidity control effect diagram of the humidity regulating article according to the embodiment 10 of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
<Embodiment 1>
A manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, including the following steps:
Step 1, prepare a coating solution.
Mix at least one kind of chloride salt, and water at not less than 40 C to prepare a humidity regulation liquid. This humidity regulation liquid is used for coating on a

4 Date Regue/Date Received 2020-12-24 substrate to manufacture a humidity regulating article, and for convenience of description below, it is referred to as a coating solution.
Step2, coat the prepared coating solution on the substrate.
At room temperature, coat the substrate with the coating solution of a coating speed of 1-15m/s, and the coating solution loaded onto the substrate is 0.81-1.11 g per cubic centimeter.
Step3, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness of the substrate is greater than 2 mm. The predetermined size can be set according to the needs of users, and can be from 20mmx20mm to 200 mmx300 mm.
Step4, microwave drying.
Perform a continuous microwave drying of the substrate loaded with the coating solution after cutting, so that the substrate is loaded with a humidity regulating composition by 0.54 g ¨0.74 g per cubic centimeter. The condition of the microwave drying is that the substrate is dried at a speed of 1-3 m/min at 15-25 KW
The substrate has a certain water absorption performance, and the water absorption of the substrate is not less than 100% of its own volume per cubic centimeter. The material of the substrate can be any one of paper material, cotton cloth, chemical fiber material, non-woven fabric, felt, and porous plastic. In this embodiment 1, the substrate is a kind of paper materials, cotton wood pulp paper. The water absorption performance of the cotton wood pulp paper is not less than 0.8 g per cubic centimeter, and the water retention performance is not less than 1.2 g per cubic centimeter. The thickness of the cotton wood pulp paper is 2mm to facilitate cutting operation.
In this embodiment, the chloride salt is NaCl.
the weight percentage of the chloride salt in the coating solution is 12%-26.8%, the weight percentage of the chloride salt in the humidity regulating composition is 18%-40.2%.
The purity of the NaCl is not less than 99.9%. The water is deionized water.
<Embodiment 2>
A manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, including the following steps:
Stepl, prepare a coating solution.
Mix at least one kind of chloride salt, and water at 45 C to prepare a coating solution.
Step2, coat the prepared coating solution on the substrate.
At room temperature, coat the substrate with the coating solution of a coating speed of 1-15m/s, and the coating solution loaded onto the substrate is 1.11 g per cubic centimeter.
Step3, microwave drying.
Perform a continuous microwave drying of the substrate loaded with the coating solution, so that the substrate is loaded with a humidity regulating composition by Date Recue/Date Received 2020-12-24 0.74 g per cubic centimeter. The condition of the microwave drying is that the substrate is dried at a speed of 1-3 m/min at 15-25 KW.
Step4, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness of the substrate is greater than 2 mm. The predetermined size can be set according to the needs of users, and can be from 2cmx2cm to 50cmx50cm.
In this embodiment, the chloride salt includes KC1 and NaCl.
The weight percentage of the chloride salt in the humidity regulating composition is 7%-16%.
The weight percentage of the chloride salt in the humidity regulating composition is 3%-15.75%.
The purity of the NaCl and KCI are both food grade pure (purity is not less than 99.9%). The water is deionized water.
When the weight percentage of the sodium lactate and the glycerol are greater than the above-mentioned percentage ranges, crystallization is easy to occur in the solution, which needs high temperature to re-dissolve, resulting in high loss and making quality of the solution unstable. When the weight percentage of NaCl and KC1 is less than the fraction range, the subsequent microwave drying process takes longer, not only the drying effect is not good, but also the humidity control performance will be reduced.
<Embodiment 3>
A manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, including the following steps:
Step 1, prepare a coating solution.
Mix at least one kind of chloride salt, and water at 40 C to prepare a solution.
5tep2, coat the prepared coating solution on the substrate.
At room temperature, coat the substrate with the coating solution of a coating speed of 10-15m/s, and the coating solution loaded onto the substrate is 0.81 g per cubic centimeter.
5tep3, microwave drying.
Perform a continuous microwave drying of the substrate loaded with the coating solution, so that the substrate is loaded with a humidity regulating composition by 0.54 g per cubic centimeter. The condition of the microwave drying is that the substrate is dried at a speed of 1-3 m/min at 15-25 KW.
Step4, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness of the substrate is in the range of 0.1-1mm. The predetermined size can be set according to the needs of users, and can be from 2cmx2cm to 50cmx50cm.
5tep5, packaging.
A package bag is used to contain and wrap the substrate loaded with the humidity regulating composition.

Date Recue/Date Received 2020-12-24 In this embodiment, the package bag is a small bag made of air-permeable material whose size is adapted to the substrate after cutting, and is provided with a plurality of air-permeable small holes.
In this embodiment, the chloride salt includes NH4C1 and NaCl.
The weight percentage of the NaCl in the coating solution is 7%-16%, and the weight percentage of the NH4C1 in the coating solution is 5%-13.75%.
The weight percentage of the NaCl in the humidity regulating composition is 10.5%-24%, and the weight percentage of the NH4C1 in the humidity regulating composition is 7.5%-20.6%.
The purity of the NaCl and KCI are both food grade pure (purity is not less than 99.9%). The water is deionized water.
The substrate loaded with the humidity regulating composition is held in the package bag. The package bag is made of thin film materials, which are permeable to water vapor but not to liquid solutions, such as non-woven fabrics, composite plastic bags, paper-plastic composite bags, and cloth bags. In this embodiment 3, the material of the package bag is non-woven fabric.
<Embodiment 4>
A manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65%-75%, including the following steps:
Step 1, prepare a coating solution.
Mix at least one kind of chloride salt, and water at 50 C to prepare a solution.
Step2, coat the prepared coating solution on the substrate.
At 45 C, coat the substrate with the coating solution of a coating speed of

5-10m/s, coating length is 3-10m, and the coating solution loaded onto the substrate is 0.96 g per cubic centimeter.
5tep3, microwave drying.
Perform a continuous microwave drying of the substrate loaded with the coating solution, so that the substrate is loaded with a humidity regulating composition by 0.64 g per cubic centimeter.
5tep4, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness of the substrate is in the range of 0.1-1mm. The predetermined size can be set according to the needs of users, and can be from 2cmx2cm to 50cmx50cm.
In this embodiment, the chloride salt includes KC1 and NaCl.
The weight percentage of the NaCl in the coating solution is 11%-15%, the weight percentage of the KC1 in the coating solution is 2%-7.5%.
The weight percentage of the NaCl in the humidity regulating composition is 16.5%-22.5%, and the weight percentage of the NH4C1 in the humidity regulating composition is 3%-15.75%.
The purity of the NaCl and KCI are both food grade pure (purity is not less than 99.9%). The water is deionized water.
<Embodiment 5>

Date Regue/Date Received 2020-12-24 A manufacturing method for an environmental humidity regulating article, in which the specific steps are the same as the embodiment 1.
Wherein, the chloride salt include NH4C1 and NaCl.
The weight percentage of the NaCl in the coating solution is 11%-15%, the weight percentage of the NaCl in the coating solution is 8%-12%.
The weight percentage of the NaCl in the humidity regulating composition is 16.5%-22.5%, the weight percentage of the NH4C1 in the humidity regulating composition is 12%-18%.
The purity of the NaCl is food grade pure (purity is not less than 99.9%). The water is deionized water.
<Embodiment 6>
A manufacturing method for an environmental humidity regulating article, in which the specific steps are the same as the embodiment 1.
Wherein, the chloride salt include KC1 and NaCl.
The weight percentage of the NaCl in the coating solution is 14%-14.8%, the weight percentage of the KC1 in the coating solution is 3%-5.4%.
The weight percentage of the NaCl in the humidity regulating composition is 21%-22.6%, the weight percentage of the KC1 in the humidity regulating composition is 4.5%-8.1%.
The purity of the NaCl and KC1 are food grade pure (purity is not less than 99.9%). The water is deionized water.
<Embodiment 7>
A manufacturing method for an environmental humidity regulating article, in which the specific steps are the same as the embodiment 1.
Wherein, the chloride salt include NH4C1 and NaCl.
The weight percentage of the NaC1 in the coating solution is 14%-14.8%, the weight percentage of the NH4C1 in the coating solution is 10%-11.4%.
The weight percentage of the NaCl in the humidity regulating composition is 21%-22.6%, the weight percentage of the NH4C1 in the humidity regulating composition is 15 4-17.1%.
The purity of the NaC1 is food grade pure (purity is not less than 99.9%). The purity of the NH4C1 is not less than 99.9%. The water is deionized water.
Take the embodiment 7 as an example, the weight percentages of NaCl, NH4C1 and water for regulating different humidity in the coating solution are shown in Table 1 below:

Date Recue/Date Received 2020-12-24 Table 1. The weight percentages of NaCl, NH4C1 and water for regulating different humidity in the coating solution Regulating NaCl ( %) NH4C1 ( %) H20 (%) humidity ( %) 65 14 11.4 74.6 71 14.6 10 75.4 75 14.8 10 75.2 The weight percentages of NaCl, NH4C1 and water for regulating different humidity in the humidity regulating composition are shown in Table 2 below:
Table 2. The weight percentages of NaCl, NH4C1 and water for regulating different humidity in the humidity regulating composition Regulating NaC1 (%) NH4C1 ( %) H20 (%) humidity (%) 65 21 17.1 61.9 69 21 16.5 62.5 71 21.9 15 63.1 75 22.2 15 62.8 Take the environmental humidity regulating article in the embodiment 7 with a size of 50cmx50cmx0.2cm, and regulate the environmental humidity of an 1 cubic meter airtight space with an initial humidity of 30%-80% at 25 C. The environmental humidity of the space can be regulated to a certain humidity within 65%-75%
with 3 months regulating effective.
<Embodiment 8>
A manufacturing method for an environmental humidity regulating article, in which the specific steps are the same as the embodiment 1.
Wherein, the chloride salt include KC1 and MgCl2.
The weight percentage of the MgCl2 in the coating solution is 6%-17%, the weight percentage of the KC1 in the coating solution is 3 4-15%, the total weight percentage of the chloride salts in the coating solution is 12-29.75%.
The weight percentage of the MgCl2 in the humidity regulating composition is 9 4-25.5%, the weight percentage of the KC1 in the humidity regulating composition is 4.5%-22.5%. The total weight percentage of the chloride salts in the humidity regulating composition is 18-44.6%.
The purity of the KC1 is food grade pure (purity is not less than 99.9%). The purity of the MgCl2 is not less than 99.9%. The water is deionized water.
<Embodiment 9>
This embodiment is an investigation experiment of microwave drying conditions in step 4. As described in the foregoing embodiments, the weight percentage of the chloride salt contained in the coating solution is lower than that in the humidity regulating composition. Therefore, the coating solution is actually an unsaturated solution, and the humidity regulating composition in the humidity control articles Date Recue/Date Received 2020-12-24 obtained in each embodiment is saturated solution. Therefore, after the coating solution of each embodiment is coated to the substrate, a certain amount of moisture needs to be removed by microwave drying to make it converted into a humidity regulating composition in the environmental humidity regulating article.
The steps of the manufacturing method of the environmental humidity regulating article of this embodiment are the same as those of the embodiment 1, but the coating solution is the one with the 69% adjusting humidity in Table 1 of embodiment 7, that is, in this embodiment, the coating solution used in step 2 is composed of 14%
weight percentage of NaCl, 11% weight percentage of NH4C1 and 75% weight percentage of water.
In this embodiment, the substrate used in step 1 is a paper substrate made of wood pulp and cotton pulp, the type number is B08, and the specific specifications are:
size 305mm x 605mm, thickness 0.7-0.8mm, and weight 380 25g/m2, the water absorption is 700-900g/m2 (after conversion, the water absorption is 0.875-4.29 g/cm3). In step 2, the coating speed of the coating solution is 8 m/s, and each cubic centimeter of the substrate is loaded with 1.0 g of the coating solution.
After calculation, after coating the coating liquid to the substrate, about 36g of water needs to be removed from each substrate in order to make the components in the humidity regulating composition reach the corresponding weight percentage in Table 2 (ie, NaCl is 21% , NH4C1 is 16.5%, water is 62.5%). In addition, in order to facilitate the preparation and coating of the coating solution, the preparation and coating of the coating solution in this embodiment are carried out under the condition of 40 C. The volatilization amount of the solvent water at this temperature can be ignored, so it can be considered that after the coating solution being formulated and coated on the substrate, the weight percentage of each component remains unchanged.
The microwave drying operation in this embodiment is performed using a microwave drying equipment. The microwave drying equipment is continuous type, with a total length of 8m and a power of 15-25KW. After the substrate is placed in its drying tunnel, it moves continuously along the length of the tunnel and is affected by microwaves in the tunnel to be dehydrated. The settable parameter of the microwave drying equipment is the rotating speed, but the rotating speed is different from the actual running speed of the material in the equipment (that is, the actual moving speed of the substrate when passing through the tunnel). Therefore, the inventor first tested the actual speed of the equipment. The results are shown in Table 3:
Date Recue/Date Received 2020-12-24 Table 3 Comparison of set rotation speed and actual speed of microwave drying equipment set rotation .. actual speed (m/min) speed(Hz) 0.566

6 0.741

7 0.905

8 1.061

9 1.213 1.365 11 1.511 12 1.667 13 1.816 14 1.978 2. 121 16 2. 277 17 2.431 18 2. 579 19 2. 730 2.881 In this embodiment, the inventors conducted a total of four batches of tests at different speeds. In the four batches of tests, the number of substrates to be dried in each batch is 20 (20 sheets are stacked), and the rotation speed of the microwave drying equipment is set to "8", "10", "12", "15". The drying results of the four batches are shown in Table 4-7. In Tables 4-7, the data in the "before drying" column is the weight of the substrate coated with the coating solution, the data in the "after drying"
column is the weight after microwave drying, and the "dehydration amount" is the weight difference before and after drying, wherein the units are all grams.
Table 4 Dehydration amount of B08 type substrate in continuous microwave drying equipment with speed set to 8 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 208. 4 155. 6 52. 8 11 208. 8 155. 3 53. 5 2 207.6 154.7 52.9 12 207.3 154.2 53.1 3 209. 5 156. 3 53. 2 13 209. 1 156. 1 53 4 210.1 158.2 51.9 14 210.7 158.2 52.5 5 209.3 156.2 53.1 15 210.9 158.3 52.6 6 209 156.3 52.7 16 211.5 159.1 52.4 7 207. 8 155. 3 52. 5 17 208. 6 155. 8 52. 8 8 211.3 159 52.3 18 207.3 154.7 52.6 9 210.7 157.9 52.8 19 206.3 153.3 53

10 209. 1 156. 1 53 20 208. 3 154. 9 53.4

11 Date Recue/Date Received 2020-12-24 Table 5 Dehydration amount of B08 type substrate in continuous microwave drying equipment with speed set to 10 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 207.4 160.6 46.8 11 209.2 160.3 48.9 2 207.9 159.7 48.2 12 208.4 159.2 49.2 3 208.5 161. 3 47. 2 13 209.9 161. 1 48.8 4 210.7 163.2 47.5 14 209.7 163.2 46.5 209.9 161.2 48.7 15 210.1 163.3 46.8 6 208.6 161.3 47.3 16 210.9 164.1 46.8 7 208.8 160.3 48.5 17 209.6 160.8 48.8 8 210.6 164 46.6 18 208.3 159.7 48.6 9 210.3 162.9 47.4 19 207.5 158.3 49.2 210.2 161.1 49.1 20 208.1 159.9 48.2 Table 5 Dehydration amount of B08 type substrate in continuous microwave drying equipment with speed set to 12 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 208.5 165.6 42.9 11 210.2 165.3 44.9 2 209.9 164.7 45.2 12 208.7 164.2 44.5 3 208.1 166.3 41.8 13 207.9 166.1 41.8 4 209.7 168.2 41. 5 14 210.7 168.2 42.

5 210.9 166.2 44.7 15 210.8 168.3 42.5 6 208.9 166.3 42. 6 16 209.9 169.1 40.

7 207.8 165.3 42.5 17 210.6 165.8 44.8 8 209.6 169 40.6 18 209.4 164.7 44.7 9 210.1 167.9 42.2 19 208.1 163.3 44.8 10 208.2 166.1 42.1 20 208.7 164.9 43.8 Table 5 Dehydration amount of B08 type substrate in continuous microwave drying equipment with speed set to 15 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 209.5 172.6 36.9 11 211.2 172.3 38.9 2 207.7 171.7 36 12 209.1 171.2 37.9 3 209.6 173. 3 36.3 13 208.3 173. 1 35.2 4 210.1 175.2 34.9 14 210.1 175.2 34.9 5 209.3 173. 2 36. 1 15 208.9 175. 3 33. 6 6 210.2 173.3 36.9 16 210.8 176.1 34.7 7 208.9 172.3 36.6 17 210.6 172.8 37.8 8 210.4 176 34.4 18 209.3 171.7 37.6 9 209.8 174.9 34.9 19 210.1 170.3 39.8 10 211.2 173.1 38.1 20 209.2 171.9 37.3

12 Date Recue/Date Received 2020-12-24 It can be seen from Table 4-7 that when the set rotation speed of the equipment is constant, the dehydration amount of the same batch of dried substrates is close, indicating that the effect of microwave drying is stable and the dehydration amount error in the same batch is small.
Summarizing the 4 test data in Table 4-7, for the 305*605mm size B08 type substrate, after coating the coating solution of the 69% humidity in Table 1, the relationship data of the set rotation speed and dehydration in the continuous microwave drying equipment, see Table 8. In Table 8, the dehydration amount is the average dehydration amount of a batch of substrates (20 sheets) at the corresponding set rotation speed.
Table 8 The relationship between set rotation speed and dehydration of B08 substrate in continuous microwave drying equipment set rotation dehydration speed(Hz) amount (g) 8 52.8 36.4 It can be seen that, in this embodiment, the microwave drying equipment can be used to dry the substrate loaded with the coating solution, and the dehydration amount of each substrate decreases as the set rotation speed of the device increases.
Fig. 1 is a linear relationship diagram between the set speed of the equipment and the dehydration amount in the embodiment 9 of the present invention.
As shown in Figure 1, the dehydration amount of the B08 substrate has a linear relationship with the equipment rotation speed, and the linearity between the two looks well. Therefore, by setting the rotation speed of the equipment, the predetermined dehydration amount can be achieved. The microwave drying device of this embodiment can be used to achieve quantitative dehydration, so that the components in the humidity regulating composition in the humidity-controlling article can reach the predetermined weight percentage finally. It can be seen from Table 8 that if the rotation speed of the microwave drying equipment is set to 15, the dehydration amount of this embodiment could be achieved.
<Comparative embodiment 1>
The comparative embodiment 1 is a comparative experiment of the embodiment 9.
The steps of the manufacturing method of the environmental humidity control article of this comparative embodiment (including the composition of the coating solution, the type of substrate, and the loading amount of the coating solution, etc.) are the same as in embodiment 9, but the microwave drying in step 4 is replaced by a hot air oven dry.
The inventor conducted a test on the temperature conditions of the hot air oven drying and found that if the temperature is too high, not only will the chloride ions be

13 Date Recue/Date Received 2020-12-24 partially volatilized as the moisture evaporates, which will affect the product quality, but the hydrocarbon structure of the paper fiber itself will also be carbonized due to the high temperature. If the temperature is too low, the drying time will be too long, which will affect production efficiency. Therefore, the setting temperature of the hot air oven in this comparative embodiment is 80 C (after testing, the actual temperature inside the oven is close to 90 C).
Since the tested hot air oven can contain 70 sheets of paper at a time, in order to simulate the production process, 70 sheets of the substrate loaded with the coating solution were placed in the hot air oven. Since the hot-air oven has different layers, and each layer can also place multiple pieces of substrate at the same time, in this comparative embodiment 8, different positions are numbered, and one piece at each position is randomly selected to record the quality before drying, taken out and weighed every 5-10 minutes, and the drying uniformity and flatness is observed.
The results of dehydration are shown in Table 9 below. In Table 9, "before drying"
refers to the weight of the substrate loaded with the coating solution before drying, "10 minutes", "15 minutes", "20 minutes", "25 minutes" and "30 minutes"
respectively refer to the dried time in the hot air oven, and the unit is gram.
Table 9 Dehydration amount of B08 substrate in comparative embodiment 1 in the hot air oven at 80 C
Position in before 10 15 20 25 30 Number the oven drying minutes minutes minutes minutes minutes 1 Left of upper 211.8 190.6 180.4 170.7 162.8 157.7 layer 2 Right of 207.5 188.9 176.5 168.9 160.3 156.2 upper layer 3 Left of upper 210.8 189.1 179.1 170.8 162.9 158.5 middle layer 4 Right of 209.6 188.4 178.3 170.7 161.4 156.3 upper middle layer Left of lower 208.8 193.8 182.9 176 174.6 169.3 middle layer 6 Right of 207.5 195.8 183.3 177.1 175.5 168.5 lower middle layer 7 Left of lower 207.8 196.7 189.4 184.1 180.5 174.4 layer 8 Right of 210.3 199.3 190.9 185.9 181.3 175.9 lower layer It can be seen from the data in Table 9 that the degree of dehydration of substrates in different layers is different, and the drying speed of multiple substrates in the same batch is severely affected by location. In the first 10 minutes, the dehydration amount per sheet of paper in the upper layer was 21 grams, and that of the lower layer was only 11 grams. The difference in dehydration amount reached

14 Date Recue/Date Received 2020-12-24 about 50%. At the 20th minute, the upper layer was dehydrated 40 grams and the bottom layer was dehydrated 25 grams, with a difference of 37.5%; At 30 minutes, the top layer was dehydrated 54 grams, and the bottom layer was dehydrated 34 grams, which is still a difference of 37%.
In addition, it can be directly seen from Table 9 that the dehydration rate of the hot air oven is not uniform, specifically: at the beginning, the dehydration rate is high because of the high moisture content (the weight difference between 5 minutes is large), and as the moisture content decreases, the dehydration rate will significantly reduce (the weight difference between 5 minutes is reduced).
Fig. 2 is the dehydration situation in the hot air oven of comparative embodiment 1 of the present invention, and Fig. 3 is a photograph of the substrate coated with the coating solution in the comparative embodiment 1 after being dried in the hot air oven.
In Figure 2, the abscissa refers different positions in the oven, and the ordinate is the weight of the substrate (in grams). Box A shows the weight range of the dried substrate that reaches the predetermined dehydration amount.
According to Fig. 2 and Table 9, due to the unevenness of the hot air circulation of the oven, the drying rate of different positions is different. At 20th minute, both the upper layer and the upper middle layer have achieved the predetermined, and the lower middle layer also achieves the predetermined at 25th minute. It takes 30 minutes for the lower layer to reach the predetermined. In addition, according to Fig.
3, it can be seen that the substrate after drying in the hot air oven has obvious warpage, and the warpage of the substrate on the outside is more serious when it is placed outside. At the same time, the surface of the substrate after drying in the hot air oven of this comparative embodiment is more compact, while the substrate after microwave drying in embodiment 9 is more loose and closer to the loose characteristics of the substrate before coating. Since the surface is tight, it will be difficult for air to enter the interior of the substrate for moisture exchange. Therefore, the characteristic of the tight surface makes the humidity regulation performance of the humidity regulating composition prepared by this comparative embodiment worse.
Furthermore, the inventor also made a second test of drying in the above hot air oven: when the drying reached the 20th minute, the upper and middle upper substrates were removed, and the lower sheet was replaced to upper positions, the final result was that the difference in the weight of the substrate reduced.
However, this operation of moving the substrate in the process is time-consuming and laborious, and the substrate still has serious warpage finally, which is not suitable for the subsequent cutting process (when the sheet is severely warped, the cut small sheets will have irregular edges and dimensions that do not meet specifications). In addition, this method of replacing the position in the middle can reduce the weight difference between the same batch of substrates, but the difference is still higher than that of the microwave drying in the embodiment 9.
<Embodiment 10>
This embodiment is similar to the embodiment 9, both of which are the Date Regue/Date Received 2020-12-24 investigation experiment of the microwave drying conditions in step 4. The difference between this embodiment and the embodiment 9 lies in the composition of the coating solution and the type of the substrate, which are specifically as follows:
The coating solution is the one with the 71% adjusting humidity in Table 1, which is composed of 14.6% weight percentage of NaCl, 10% weight percentage of NH4C1 and 75.4% weight percentage of water.
The substrate in this embodiment is the substrate of type number B20. The specific specifications are: size 305mm x 605mm, thickness 1.9-2.1mm, gram weight 850 50g/m2, water absorption 1800-2200g/m2 (after conversion, the water absorption is 0.86-4.16 g/cm3). After calculation, each substrate needs to be dehydrated about 93g of water to make the components of the humidity regulating composition of the humidity regulating article reach the corresponding weight percentages in Table 2 (i.e., NaCl is 21.9%, NH4C1 is 15%, and water is 63.1%).
In this embodiment, a total of three batches of microwave drying experiments were performed, and the number of substrates loaded with coating solution to be dried in each batch was 20 sheets (20 sheets were all stacked), and the rotation speed of the microwave drying equipment was set separately "6", "7", "8", the drying results of the three batches are shown in Table 10-Table 12.
Table 10 Dehydration amount of B20 type substrate in continuous microwave drying equipment with speed set to 6 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 528. 5 424. 6 103. 9 11 530. 2 426. 9 103. 3 2 529. 9 425. 3 104. 6 12 528. 7 424. 3 104. 4 3 528.1 424.1 104 13 527.9 423.9 104 4 529. 7 425 104. 7 14 530. 7 427. 1 103. 6 530. 9 426 104. 9 15 530. 8 427. 2 103. 6 6 528. 9 423. 9 105 16 529. 9 425. 4 104. 5 7 527. 8 422. 7 105. 1 17 530. 6 426. 8 103. 8 8 529. 6 425. 1 104. 5 18 529. 4 426. 2 103. 2 9 530. 1 426. 5 103. 6 19 528. 1 424. 5 103. 6 528. 2 423. 8 104. 4 20 528. 7 423. 6 105. 1 Date Recue/Date Received 2020-12-24 Table 11 Dehydration amount of B20 type substrate in continuous microwave drying equipment with speed set to 7 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 528. 4 430. 6 97. 8 11 529. 2 432. 9 96. 3 2 528. 9 431. 3 97. 6 12 528. 4 430. 3 98. 1 3 528. 5 430. 1 98. 4 13 527. 9 423. 9 4 530. 7 431 99. 7 14 530. 7 433. 1 97. 6 529. 9 432 97. 9 15 530. 1 432. 2 97. 9 6 528. 6 429. 9 98. 7 16 530. 9 431. 4 99. 5 7 527.8 428.7 99.1 17 529.6 431.8 97.8 8 530. 6 431. 1 99. 5 18 528. 3 431. 2 97. 1 9 530. 3 432. 5 97. 8 19 527. 5 430. 5 97 529. 2 429. 8 99. 4 20 528. 1 429. 6 98. 5 Table 12 Dehydration amount of B20 type substrate in continuous microwave drying equipment with speed set to 8 before after dehydration before after dehydration Number Number drying drying amount drying drying amount 1 527. 5 434. 3 93. 2 11 529. 8 436. 3 93. 5 2 529. 1 435. 1 94 12 527. 3 434. 3 93 3 528. 9 434. 7 94. 2 13 529. 9 435. 9 94 4 528. 3 435. 1 93. 2 14 530. 1 436. 1 94 5 529.9 435.9 94 15 528.8 435.2 93.6 6 527.7 433.9 93.8 16 527.94 435.4 92.54 7 529.3 435.7 93.6 17 529.6 436.8 92.8 8 529. 6 435. 1 94. 5 18 530. 4 436. 2 94. 2 9 529. 8 436 93. 8 19 528. 4 434. 5 93. 9 10 530. 2 435. 8 94. 4 20 529. 7 435. 6 94. 1 Fig.4 is a photograph of a substrate coated with the coating solution after microwave drying in embodiment 10 of the present invention, and Fig. 5 is an electron microscope photograph of the substrate of Fig. 4. The substrates in Fig. 4 and Fig. 5 are all the substrate of Number 1 in Table 10.
As shown in Figure 4, the B20 substrate is thicker. After microwave drying, it is flat and has no warping, and the surface is relatively loose. As shown in Fig.
5, after microwave drying, the coating solution, which was originally an unsaturated solution, is saturated and forms fine crystals inside the substrate. These crystals have a relatively uniform particle size and a relatively uniform distribution.
As shown in Figure 4, the B20 substrate is thicker. After microwave drying, it is flat and has no warping, and the surface is relatively loose. As shown in Fig.
5, after microwave drying, the coating solution, which was originally an unsaturated solution, is saturated and forms fine crystals inside the substrate. These crystals have a relatively uniform particle size and a relatively uniform distribution.

Date Recue/Date Received 2020-12-24 Summarizing the three batches of test data in Table 10 to Table 12, the relationship between the rotation speed and the dehydration amount of the continuous microwave drying equipment after coating the coating solution of 71%
adjusting humidity in this embodiment is shown in Table 13. In Table 13, the dehydration amount is the average dehydration amount of a batch of substrates (20 sheets) at this rotation speed.
Table 13 The relationship between set rotation speed and dehydration amount of B20 substrate in continuous microwave drying equipment set rotation dehydration speed (Hz) amount (g) 6 104.2 7 98.5 8 93.7 The linear fitting of the data in Table 13 shows that the dehydration amount of the B20 substrate also has a good linear relationship with the equipment rotation speed. Therefore, for thicker substrates, setting the rotation speed of the equipment can also achieve a predetermined amount of dehydration to achieve quantitative dehydration. For this embodiment, setting the rotation speed of the device to 8 can achieve the required dehydration amount.
Fig. 6 is a humidity control effect diagram of the humidity regulating article according to the embodiment 10 of the present invention. In Fig. 6, the abscissa is time (d, day), and the ordinate is temperature ( C) and humidity (%).
In order to verify the performance of the humidity regulating article in this embodiment, one piece was randomly selected from the dried substrates corresponding to Table 12 (that is, the dried substrate obtained under the condition of rotating speed 8) and cut into small pieces. Take lOg and put it in a closed container (about 2L in volume), and then put in a wet tissue that has absorbed lg of water (time point Ti). A hygrometer is used to monitor and record the humidity in the container in real time, and the result is shown in Figure 6. It can be seen from Figure 6 that the humidity was maintained at about 71% before putting the wet tissue in, and after putting in, the humidity rise rapidly to about 75%, then gradually decreased, and returned to about 71% after a period of time. The humidity is maintained near the humidity for a long period of time until the humidity regulating article is taken out (time point T2). It can be seen that humidity regulating article prepared in this embodiment has good humidity regulating performance and can accurately maintain the environmental humidity at the target humidity.
<Comparative embodiment 2>
The manufacturing method, hot air drying equipment and conditions of the environmental humidity regulating article of this comparative embodiment 2 are the same as those of comparative embodiment 1, but the substrate and coating solution used are the same as those of the coating solution 10 (that is, B20 substrate and 71%
humidity-adjusting coating solution).
The results of the dehydration data of this comparative embodiment are shown in Date Regue/Date Received 2020-12-24 Table 14 below. In Table 14, "before drying" refers to the weight of the substrate loaded with the coating solution before drying, "30 minutes", "60 minutes", "75 minutes", "90 minutes" and "100 minutes" refer to drying time in the hot air oven respectively, and the unit is all grams.
Table 14 Dehydration amount of B20 substrate in the hot air oven at 80 C
Position in the before 10 15 20 25 30 Number oven drying minutes minutes minutes minutes minutes Left of upper 1 530.8 489.0 451.8 442.5 435.0 427.6 layer Right of upper 2 527.5 485.7 448.5 439.2 431.7 428.0 layer Left of upper 3 532 492.0 456.7 449.2 441.8 437.1 middle layer Right of upper 4 528.1 488.1 452.8 445.3 437.9 433.2 middle layer Left of lower 526.7 494.2 463.5 452.3 444.9 441.1 middle layer Right of lower 6 529.5 497.0 466.3 455.1 447.7 443.9 middle layer Left of lower 7 527.3 504.1 485.5 478.0 470.6 466.9 layer Right of lower 8 530.8 506.0 487.4 479.9 472.5 468.8 layer It can be seen from Table 14 that, similar to comparative embodiment 1, there is a problem of uneven dehydration when the B20 substrate is dried in a hot air oven. In addition, the apparent performance of the dried substrate was similar to that of comparative embodiment 1, with the defects that the substrate was warped and the substrate surface became compact.
The function and effect of the embodiment According to the coating solution, the environmental humidity regulating article and the manufacturing method of the above-mentioned embodiments, because the weight percentage of the chloride salt in the coating solution ranges from 12%
to 29.75%, when coated on the substrate and then microwave dried, the solution can convert into a humidity regulating composition loaded on the substrate. And in the humidity regulating composition, the weight percentage of chloride salt ranges from 18% to 44.6%, therefore, the environmental humidity regulating articles of the embodiments can regulate the environmental humidity within 65%-75%, and the humidity regulating articles of different compositions within this range can accurately maintain the target environment at the predetermined humidity, for example, the humidity corresponding to the humidity regulating composition with adjusting humidity 69% in Table 2 can maintain the target environmental humidity at 69% 1%, which is particularly suitable for cigar storage. Other humidity regulating articles are also suitable for storage of different items, such as other Date Recue/Date Received 2020-12-24 tobacco products.
The humidity regulating composition contained in the environmental humidity regulating articles of the embodiments is saturated solution, which has a large moisture absorption and release capacity, does not need to be pre-balanced and can be directly put into the target environment for use. Meanwhile, since the substrate can be arbitrarily cut according to requirements, the substrate can be cut to an appropriate size according to the volume of the target environment during use, and then directly placed in the target environment, which is very convenient to use.
Not only that, the environmental humidity regulating article of above embodiments only contains common chloride salts, and the composition prepared using these chloride salts is not only low in cost, but also safe to the manufacture workers, the environment and the object to be preserved. Moreover, the environmental humidity regulating article manufactured by the manufacturing method of the present embodiment is still friendly to the natural environment after being discarded, and can be naturally decomposed without causing secondary pollution.
The manufacturing method in embodiments use microwave drying for dehydration. Compared with the traditional hot air drying, the microwave drying not only does not require long-term preheating, but also can uniformly dry to each substrate leading a precise dehydration. As a result, the coating solution loaded on the substrate can uniformly dehydrate to form a saturated solution, and the formed crystals are uniformly distributed inside the substrate with a uniform particle size.
This uniformly distributed saturated solution is not easy to increase or decrease due to environmental humidity, so a large-area crystal dissolution or crystal formation will not easy to occur inside the substrate, so article is more stable and less prone to failure. In addition, the surface of the substrate will not form large crystals due to uneven dehydration, so the surface of the humidity control article is neat and smooth, and crystal dust will not be generated during cutting.
Moreover, the set rotation speed of the microwave drying equipment has a good linear relationship with the dehydration amount, so by adjusting the speed of the microwave drying equipment, the dehydration amount of the substrate can be controlled to achieve quantitative dehydration. Therefore, in the manufacturing method of the embodiments, the amount of dehydration is controllable, and is suitable for manufacturing humidity regulating articles containing humidity regulating compositions of different predetermined compositions.
In addition, the above-mentioned microwave drying method can also maintain the characteristics of the loose surface of the substrate. When used, the air in the environment can more easily enter the interior of the substrate for moisture exchange (that is, moisture absorption or desorption), and the target humidity can be reached faster. The environmental humidity regulating articles in the embodiments have the characteristics of rapid humidity control.
In the embodiments, the microwave drying is carried out by continuous microwave drying equipment. Compared with the existing hot air drying equipment, it can put the substrate in without preheating, so the effective production time is Date Recue/Date Received 2020-12-24 longer. It is estimated that in the same production time, microwave drying increases the production capacity of the B08 substrate drying step by 40% (compared to the hot air oven drying), and the production capacity of B20 substrate drying by 129%.
The greater the amount of dehydration required, the more obvious the advantages of microwave drying in terms of energy saving and time saving. In addition, continuous microwave drying equipment can achieve continuous production, and it is easier to match the coating of the previous step and the cutting or package of the next step, so that there is almost no need to transport the substrate in the entire manufacturing method, which can reduce labor costs and improve overall production efficiency.
The foregoing embodiments are preferred cases of the present invention and is not used to limit the scope of protection of the present invention.
For example, in the embodiments, the package bag is made of a thin-walled material that is permeable to water vapor but not permeable to liquid solutions. In the present invention, small holes can also be provided on the package bag, and the speed of humidity adjustment can be changed by adjusting the number of small holes (for example, a large number of small holes can allow the environmental humidity regulating articles to contact the air in the environment faster, leading a quicker humidity regulation). Furthermore, other package ways can also be used in the present invention, for example, a protective film made of breathable material could be covered on the surface of the substrate coated with the humidity regulation liquid and lowered to room temperature, so that the humidity regulating article is of a larger size, which users can cut arbitrarily according to their needs, being more convenient to use.
In the embodiments, the substrate is a kind of paper materials, cotton wood pulp paper. This kind of substrate is mainly made of wood pulp, cotton pulp, etc., so it has strong water retention and can absorb more liquid. In the present invention, the substrate can also be made of other similar materials, such as cotton cloth, chemical fiber materials, non-woven fabrics, felt, porous plastics, mineral substrates and the like.

Date Regue/Date Received 2020-12-24

Claims (10)

What is claimed is:

1. A coating solution, used for coating onto a substrate to prepare an environmental humidity regulating article that controls the environmental humidity at 65-75%, characterized by being composed of at least one chloride salt and water, wherein the chloride salt is at least one of NaC1, NH4C1, KC1 and MgC12, the weight percentage of the chloride salt in the solution is 12% to 29.75%.

2. A manufacturing method for an environmental humidity regulating article used to adjust environmental humidity within 65% - 75%, characterized by including the following steps:
preparing a coating solution, wherein at least one chlorinated salt and water are prepared as coating solution at no lower than 40 C;
coating said coating solution onto a substrate, comprising:
coating said substrate with said coating solution of a coating speed of 1 -15m/s at room temperature, wherein said coating solution loaded onto said substrate is 0.81 - 1.11 g per cubic centimeter;
performing microwave drying;
wherein said microwave drying is continuously performed on said substrate loaded with the coating solution, so that said substrate is loaded with a humidity regulating composition by 0.54 g - 0.74 g per cubic centimeter;
wherein the chloride salt is at least one of NaC1, NH4C1, KC1 and MgC12, the weight percentage of said chloride salt in said coating solution is 12% - 29.75%, the weight percentage of said chloride salt in said humidity regulating composition is 18% - 44.6%, the condition of said microwave drying is that said substrate is dried at a speed of 1 - 3 m/min at 15 - 25 KW.

3. The manufacturing method according to claim 2, characterized by that:
wherein said humidity regulating composition contains one of the chloride salts, said chloride salt is NaC1, the weight percentage of said chloride salt in said coating solution is 12% -26.8%, the weight percentage of said chloride salt in said humidity regulating composition is 18% - 40.2%.

4. The manufacturing method according to claim 2, characterized by that:
wherein said humidity regulating composition contains KC1 and NaC1, or contains NH4C1 and NaC1, the weight percentage of said NaC1 in said coating solution is 7% - 16%, the weight percentage of said NH4C1 in said coating solution is 5% - 13.75%, the weight percentage of said KC1 in said coating solution is 2% - 10.5%, Date Reçue/Date Received 2022-11-29 the weight percentage of said NaC1 in said humidity regulating composition is 10.5% - 24%, the weight percentage of said NH4C1 in said humidity regulating composition is 7.5% - 20.6%, the weight percentage of said KC1 in said humidity regulating composition is 3% - 15.75%.

5. The manufacturing method according to claim 4, characterized by that:
wherein the weight percentage of said NaC1 in said coating solution is 11% -15%, the weight percentage of said NH4C1 in said coating solution is 8% - 12%, the weight percentage of said KC1 in said coating solution is 3% - 8%, the weight percentage of said NaC1 in said humidity regulating composition is 16.5% - 22.5%, the weight percentage of said NH4C1 in said humidity regulating composition is 12% - 18%, the weight percentage of said KC1 in said humidity regulating composition is 4.5% - 12%.

6. The manufacturing method according to claim 5, characterized by that:
wherein the weight percentage of said NaC1 in said coating solution is 14% - 4.8%, the weight percentage of said NH4C1 in said coating solution is 10% - 11.4%, the weight percentage of said KC1 in said coating solution is 5% - 7.4%, the weight percentage of said NaC1 in said humidity regulating composition is 21% - 22.6%, the weight percentage of said NH4C1 in said humidity regulating composition is 15% - 17.1%, the weight percentage of said KC1 in said humidity regulating composition is 7.5% - 11.1%.

7. The manufacturing method according to claim 2, characterized by that:
wherein said humidity regulating composition contains KC1 and MgC12, the weight percentage of said MgC12 in said coating solution is 6% - 17%, the weight percentage of said KC1 in said coating solution is 3% - 15%, the total weight percentage of said chloride salts in said coating solution is 12% - 29.75%, the weight percentage of said MgC12 in said humidity regulating composition is 9% - 25.5%, the weight percentage of said KC1 in said humidity regulating composition is 4.5% - 22.5%, the total weight percentage of said chloride salts in said humidity regulating composition is 18 - 44.6%.

8. The manufacturing method according to claim 2, characterized by further Date Reçue/Date Received 2022-11-29 comprising:
cutting said substrate into a predetermined size, wherein said substrate comprises any one of paper material, cotton cloth, chemical fiber material, non-woven fabric, felt, porous plastic, and mineral substrate.

9. The manufacturing method according to claim 8, characterized by further comprising:
packing the substrate loaded with the coating solution with a package bag.

10. An environmental humidity regulating article used to adjust environmental humidity within 65% - 75%, characterized by being manufactured by the manufacturing method according any one of claims 2 to 9.

Date Recue/Date Received 2022-11-29