KR20160035703A - Humidity controlling chip, humidity controlling wallpaper and method for preparing humidity controlling wallpaper - Google Patents

Abstract

The present invention provides: a chip for controlling humidity, wherein the chip is formed from a composition comprising 40 to 75 wt% of gamma alumina, 20 to 60 wt% of an aqueous binder, 0.1 to 5 wt% of an aqueous emulsion dispersant, and 0 to 5 wt% of a foaming agent; a humidity controlling wallpaper using the same; and a producing method thereof. The humidity controlling wallpaper has high absorption and desorption performance of moisture.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidity control chip, a humidity control wallpaper using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidity control chip, a humidity control wallpaper using the same, and a manufacturing method thereof.

The maintenance of proper temperature and humidity in the room is the most basic requirement for creating a pleasant indoor environment, and it is becoming more important according to the desire of the modern people to pursue higher quality of life.

However, humidity control, which depends on ventilation, has limitations in maintaining a pleasant environment. In addition, the difficulty is increasing due to the characteristics of modern buildings that are increasingly larger and more closed.

Therefore, the humidity of the room is controlled by attaching the tile having the humidity control function to the wall inside the house or the building. However, the tile has a heavy burden on the construction, and there are limitations on the size and thickness due to difficulties in the manufacturing process such as heat treatment.

In addition, the use of volcanic ash and diatomaceous earth, which form micropores as a functional material for indoor construction, has drawbacks in that it needs to be collected from nature, has different functionality depending on the area and collection location, and has a limitation in reserves and places. In addition, in the case of wallpaper produced using such raw materials, the moisture absorptive and desorptive amount is not more than 5 g / m ² in terms of the functionality as compared with the tile products currently in mass production. Particularly, in the case of wallpaper, its thickness is thin, so that it has a limited ability to have excellent moisture absorptive and desorptive properties even in a humidity-sensitive wallpaper.

The present invention provides a humidity-conditioning chip formed from a composition comprising 40 to 75 wt% of gamma alumina, 20 to 60 wt% of an aqueous binder, 0.1 to 5 wt% of an aqueous emulsion dispersant, and 0.5 to 5 wt% of a foaming agent, do.

However, the technical problem to be solved by the present invention is not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention provides in one embodiment a humidity-conditioning chip formed from a composition comprising from 40 to 75% by weight gamma alumina, from 20 to 60% by weight of an aqueous binder, from 0.1 to 5% by weight of an aqueous emulsion dispersant and from 0.5 to 5% by weight of a foaming agent do.

In another embodiment, the present invention relates to a substrate; And a humidity-sensitive wallpaper comprising a humidity-conditioning chip formed from a composition comprising 40 to 75% by weight of gamma alumina, 20 to 60% by weight of an aqueous binder and 0.1 to 5% by weight of an aqueous emulsion dispersant and 0.5 to 5% Lt; / RTI >

A humidity wall paper having a viscosity of 2000 to 8,000 cps at 25 캜 can be provided.

The gamma alumina can provide a humidity wallpaper in which the gamma alumina precursor is fired at a temperature ranging from 500 to 900 < 0 > C.

The gamma alumina can provide a humidity wall paper having an average particle diameter of 5 to 250 mu m.

The gamma alumina can provide a humidity wall paper having an average diameter of 2 nm to 50 nm mesopores.

The gamma alumina may provide a humidity wall paper having a pore volume of 0.1 cm ³ / g to 0.3 cm ³ / g.

The aqueous binder may provide a moisture-sensitive wallpaper comprising at least one selected from the group consisting of water-soluble acrylic, water-soluble polyurethane, water-soluble ethyl vinyl acetate, water-soluble latex, water-soluble epoxy, water-soluble silicone emulsion and combinations thereof.

The humidity control chip may further include at least one organic additive selected from the group consisting of an organic pigment, an environment-friendly solvent, a defoaming agent, a viscosity control agent, and a combination thereof.

Wherein the humidity controlling chip comprises at least one inorganic additive selected from the group consisting of inorganic pigments, TiO ₂ , CaCO ₃ , Ca (OH) ₂ , CaO, Al (OH) ₃ , Al ₂ O ₃ , SiO ₂ , It is possible to provide a humidity wall paper which is additionally included.

It is possible to provide a humidity wall paper having a diameter of 0.5 to 5 mm.

In yet another embodiment, the present invention provides a process for preparing gamma alumina comprising: (a) preparing gamma alumina; (b) preparing a composition comprising the gamma alumina, the aqueous binder, the aqueous emulsion dispersant and the foaming agent; (c) heat-treating and pulverizing the composition to produce a humidity-sensitive chip.

In the step (a), it is possible to provide a method of manufacturing a moisture-sensitive wallpaper, further comprising the step of attaching the humidity-sensing chip to an upper portion of the substrate.

Wherein the composition is coated on the release film before the heat treatment and is peeled from the top of the release film after the heat treatment in the step (c).

And the thickness of the coating is 0.5 mm to 5 mm.

And the basis weight of the coating is 300 g / m < 2 > to 1,500 g / m < 2 >.

In the step (c), the heat treatment may be performed at a temperature ranging from 25 to 250 ° C.

And the humidity control chip is attached to the upper portion of the substrate using an adhesive in the step (d).

 (e) forming a printing layer on the humidity-controlling chip.

And a step of applying an embossing process to the top of the printing layer to provide an embossed wallpaper.

The humidity control chip according to the present invention is formed from a composition comprising gamma alumina, an aqueous binder and an aqueous emulsion dispersant and a foaming agent. The humidity control wallpaper using the humidity control chip has a high moisture absorption / .

1 is a flowchart showing a method of manufacturing a humidity wall paper according to an embodiment of the present invention.
2 is a photograph of a humidity wall paper according to an embodiment of the present invention.

The inventors of the present invention have completed the present invention by studying building materials having an indoor humidity control function and confirming that moisture humidity control using a composition-based chip using gamma-alumina as a main ingredient has high moisture absorptive and desorptive properties, thereby facilitating the function of controlling indoor humidity .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

Humidification  chip

The present invention relates to a humidity conditioning system comprising a composition comprising about 40 to about 75 weight percent gamma alumina, about 20 to about 60 weight percent aqueous binder, about 0.1 to about 5 weight percent aqueous emulsion dispersant, and about 0.5 to about 5 weight percent blowing agent For example.

By having the above-described composition, the humidity-controlling chip can be adhered to indoor materials and the like, thereby realizing excellent moisture absorptive and desorptive performance and deodorizing performance.

Functional Humidity  wallpaper

The present invention relates to: a substrate; And a humidity-sensitive wallpaper comprising a humidity-conditioning chip formed from a composition comprising 40 to 75% by weight of gamma alumina, 20 to 60% by weight of an aqueous binder and 0.1 to 5% by weight of an aqueous emulsion dispersant and 0.5 to 5% Lt; / RTI >

The functional humidity-resistant wallpaper produced by attaching the humidity-conditioning chip formed from the composition onto the substrate is imparted with the humidity control capability from the gamma-alumina to the wallpaper, so that the limitation on the thickness of the conventional humidity- Wallpaper can be implemented.

The gamma alumina may be used in the form of powder particles, and the content thereof may be about 40 to about 75 wt% of the composition. When the content of gamma alumina is less than 40% by weight, the effect of controlling humidity, TVOC, HCHO deodorization or the like may be low, and if it exceeds 75% by weight, It may be disadvantageous to securing physical properties as wallpaper.

The gamma alumina is prepared by calcining a gamma alumina precursor, specifically an aluminum alkoxide, an alkaline earth metal salt, preferably aluminum hydroxide, at a temperature of about 500 to about 900 DEG C to form a particle powder. Here, firing refers to an operation of sintering powder.

For example, aluminum hydroxide (aluminum hydrate, gibbsite, Al2O3? 3H2O) undergoes dehydration reaction as it is heated and transforms into aluminum oxide (alumina, Alumina, Al2O3) through boehmite (Al2O3? H2O). In this phase change process, fine mesopores are formed by dewatering. It is possible to control the pore size and amount of mesopores appropriately and to make gamma alumina having humidity control ability useful for functional building materials such as wallpaper as described above .

At this time, when the aluminum hydroxide is completely heat-treated to form the final phase alpha-alumina, the mesopores disappear and it is difficult to exhibit the functionality. By appropriately forming a gamma alumina phase with the heat-treated aluminum hydroxide, desired physical properties are imparted. Gamma alumina is excellent in heat resistance and chemical stability at high temperature, superior in uniformity of pore distribution, and superior in surface activity compared with boehmite, gamma alumina, delta alumina and difference alumina among porous alumina And has excellent moisture absorption, deodorization and adsorption effect.

The heat treatment may be performed specifically at about 500 to about 900 < 0 > C. When gamma alumina is fired and the temperature is lower than about 500 ° C., aluminum hydroxide may not exhibit a phase change to gamma phase, resulting in a problem that it can not exert its humidity control function because it has a high specific gravity and a dense shape. There is a concern that the specific surface area is rapidly reduced as the void structures inside are merged. The gamma alumina phase can be formed so as to exhibit excellent humidity control performance while forming mesopores having a predetermined pore size by heat treatment at the temperature within the above range.

The heat treatment may be performed for about 5 seconds to about 60 minutes.

The heat treatment may be performed in a batch type.

The heat treatment may be performed using various heat treatment apparatuses. For example, the heat treatment may be carried out by using an electric furnace, a gas furnace, a rotary kiln, a flash dryer, a spray dryer, a baking furnace such as a cake dryer, a dryer, And at least one selected from the group consisting of

The gamma alumina is a particle having an average particle diameter of about 5 mu m to about 250 mu m. When the average particle diameter of the particle powder is less than about 5 탆, it is difficult to mix with the environmentally-friendly aqueous binder for dispersibility when it is mixed with the environmentally-friendly aqueous binder, and it may be difficult to increase the viscosity as the particle size becomes lower. Further, the smaller the particle size, the higher the cost, so that it is not preferable that the average particle size is less than about 5 탆 in terms of material cost. When the average particle diameter of the gamma alumina particle powder is more than about 250 탆, the particle size is too large, so that the surface becomes too coarse during coating and molding, and the efficiency may also decrease in terms of the moisture absorptive and desorptive function.

The gamma alumina particle powder has a size within the above-mentioned average particle size range, so that it can exhibit excellent moisture absorptive and desorptive performance and may not hinder the surface characteristics during coating and molding.

The gamma alumina has an average diameter of about 2 nm to about 50 nm mesopores. The gamma alumina can effectively control the humidity by mesopores having the above range. Therefore, the above-described functionality can be imparted to the humidity-conditioning chip including the gamma-alumina.

For example, the gamma alumina may have a pore volume from about 0.1 cm ³ / g to about 0.3 cm ³ / g. The gamma alumina in which the mesopores are formed to have the porosity has excellent moisture absorptive and desorptive performance and deodorization performance.

The aqueous binder may be a water-soluble acrylic, a water-soluble polyurethane, a water-soluble ethyl vinyl acetate, a water-soluble latex, a water-soluble epoxy, a water-soluble silicone emulsion or the like or a combination thereof. The content of the aqueous binder is about 30 to about 60 wt% based on the solid content of the composition. When the content of the aqueous binder is less than about 20 wt%, the flexibility of the wallpaper is greatly reduced, If the content exceeds 60% by weight, the viscosity of the composition may be too low, which may make it impossible to produce a wallpaper through the coating, and the humidity control function is deteriorated.

The aqueous emulsion dispersant is characterized in that the composition has a constant viscosity and thus facilitates the coating to a certain thickness, and when the humidity-conditioning chip formed therefrom has a certain size size, it is not broken. When the content of the aqueous emulsion dispersant is less than about 0.1% by weight, the dispersibility of the aqueous emulsion dispersant may deteriorate, resulting in the aggregation of the solid components. When the content of the aqueous emulsion dispersant is less than about 5% On the other hand, when the amount of the dispersing agent is more than 10 wt%, the dispersing agent is excessively formed, forming a film on the surface of the composition or forming a floating layer.

The foaming agent is added after coating the composition for foaming. In the case of the foaming agent, the physical foaming agent and the chemical foaming agent are not limited to any one. When the foaming agent is used, the density of the coating portion of the composition is lowered, and in this case, the effect of the moisture absorptive and desorptive properties can be enhanced. The blowing agent may be present in an amount ranging from about 0.5% to about 5% by weight of the composition. If the content of the blowing agent is less than about 0.5% by weight, the humidity control coating layer can not be foamed properly. If the content of the blowing agent is more than 5% by weight, foaming occurs and the density of the coating layer is low.

The viscosity of the composition forming the humidity-sensitive chip can be from about 2000 to about 8,000 cps at about 25 ° C, and specifically the viscosity of the composition can be from about 2000 to about 6000 cps. The viscosity of the composition can be adjusted to the above range to improve the degree of granulation of the humidity control chip.

The humidity control chip may include an organic additive. Wherein the organic additive is an organic additive or an inorganic pigment comprising at least one selected from the group consisting of an organic pigment, an environment-friendly solvent, a defoaming agent, a viscosity modifier, and a combination thereof, TiO2, CaCO3, Ca (OH) 2, CaO, ) 3, Al 2 O 3, SiO 2, and combinations thereof.

The humidity controlling chip may have a diameter of about 0.5 mm to about 5 mm. By manufacturing the chips with the sizes within the above ranges, not only the moisture absorptive and desorptive performance is improved but also the aesthetic characteristics are improved. Unlike the coating layer of the composition for general humidity control, which is thinly coated on the upper part of the base material, it is possible to produce a moisture-absorbing wallpaper having high moisture absorptive and desorptive property by using the humidity-controlling chip of the above-mentioned size.

Functional Humidity  How to make wallpaper

(A) preparing gamma alumina; (b) preparing a composition comprising the gamma alumina, the aqueous binder, the aqueous emulsion dispersant and the foaming agent; (c) heat-treating and crushing the composition to produce a humidity-conditioning chip.

Fig. 1 is a flowchart showing one embodiment of the above manufacturing method.

Referring to FIG. 1, the illustrated method for manufacturing a functional humidity wall paper includes (a) a step of producing gamma alumina, (b) a step of producing a composition, and (c) a step of manufacturing a chip for humidity control.

The step (a) is a step of producing gamma alumina. The gamma alumina is prepared by calcining a gamma alumina precursor, specifically an aluminum alkoxide, an alkaline earth metal salt, preferably aluminum hydroxide, at a temperature of about 500 to about 900 DEG C to form a particle powder. Specific conditions for the gamma alumina production are as described above.

The step (b) is a step of preparing a composition comprising the gamma alumina, an aqueous binder, an aqueous emulsion dispersant and a foaming agent. A composition comprising from about 40 to about 75 weight percent gamma alumina, from about 20 to about 60 weight percent aqueous binder, from about 0.1 to about 5 weight percent aqueous emulsion dispersant, and from about 0.5 weight percent to about 5 weight percent blowing agent. Specific conditions for the composition are as described above.

In the step (c), the composition is heat-treated and pulverized to produce a humidity-sensitive chip. The composition may be coated on the release film before the heat treatment and may be peeled from the top of the release film after the heat treatment.

The composition may be coated on the release film using a screen printing method.

The coating may be dried by heat treatment at a temperature ranging from about 25 to about < RTI ID = 0.0 > 250 C. < / RTI > The composition coated on the release film can be dried while leaving it at room temperature, and when the temperature exceeds 250 DEG C, the surface is cracked and the surface is likely to be broken. By performing the heat treatment in the temperature range described above, it is possible to obtain a moisture-proof chip whose surface is smooth and which is not easily broken.

The coating can be formed to a thickness of about 0.5 to about 5 mm. When the coating is formed to have a thickness of less than about 0.5 mm, the overall thickness of the coating is reduced, which lowers the overall coating weight and lowers the moisture absorptive and desorptive performance. When the coating is formed to a thickness exceeding about 5 mm, Lt; / RTI >

The coating amount can be adjusted so that the basis weight after drying is about 300 g / m ² to about 1,500 g / m ² . When the basis weight of the coating is less than about 300 g / m ^{2, the} coating weight may be too low to lower the moisture absorptive and desorptive properties. When the coating weight exceeds about 1,500 g / m ² , the coating thickness may become thick, Problems that do not dry out can occur.

At this time, the release film is preferably a film made of at least one selected from heat resistant PET (polyethylene terephthalate), PEN (polyethylenenaphthalate), PES (polyethersulfone), PC (Polycarbonate), PP (polypropylene) and norbornene resins. It does not.

Further, the dried product after the heat treatment of the composition can be peeled off from the top of the release film.

The humidity-controlling chip can be ground by a known milling method, and the milling methods include pin mill, rett mill, roll mill and impact mill. The dried body that has been peeled off from the release film may be produced by pulverizing to a diameter of about 1 mm to about 5 mm. By producing the chip within the above-mentioned range, there is an effect of maximizing the moisture absorptive and desorptive performance. Unlike the coating layer of the composition for general humidity control, which is thinly coated on the upper part of the base material, the humidity-sensitive wallpaper having high moisture absorptive and desorptive properties can be produced by using the above-described humidity control chip.

(d) attaching the humidity control chip to the top of the substrate. The humidity-controlling chip may be attached to the top of the substrate using an adhesive. The adhesive is attached to the substrate using a urethane binder, a polyester, a polyolefin, preferably an acrylic binder. Acrylic binders are advantageous in that they are water-based compared to other adhesives, so there are no environmental issues compared to other products.

The base material may be any one of PVC, synthetic leather, nonwoven fabric, pulp, cotton base fabric, hemp, and silk, but is not limited thereto, and is preferably a nonwoven fabric. In particular, in the case of a nonwoven fabric produced by mixing synthetic fibers and natural fibers, the antibacterial properties of synthetic fibers and the environmentally friendly characteristics of natural fibers and excellent tactile feelings can be realized at the same time.

(e) forming a print layer on top of the humidity control chip. The step of forming a print layer may be further performed by using at least one method selected from the group consisting of gravure printing, flexographic printing, or rotary screen printing and a combination thereof using an aqueous ink on the coating layer for humidity control.

Further, the step of embossing may be further performed by performing an embossing process on the print layer.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the following examples.

Example 1

Aluminum hydroxide powder having an average particle size of 50 占 퐉 was prepared by performing heat treatment in an electric furnace at 800 占 폚 for 30 minutes.

57% by weight of the gamma-alumina powder prepared above was added to 40% by weight of the aqueous acrylic binder based on the solid content, and the mixture was mixed at 1,000 rpm for 20 minutes or more. To such a mixture, 1% by weight of an aqueous emulsion dispersant, 1% by weight of a foaming agent and 1% by weight of other additives were mixed and mixed at 1,000 rpm for at least 10 minutes to prepare a composition. When the composition was mixed, the amount of water was adjusted so that the coating viscosity became 4,000 cps (based on 25 ° C). The prepared composition was coated on the release film to a thickness of 1.5 mm by screen printing, and then dried at 160 DEG C for 2 minutes. Thereafter, the dried product removed from the release film was crushed to a size of 2 mm using a crusher to produce a humidity-resistant chip. (Acrylic binder) was applied on the nonwoven fabric and attached with a chip to prepare a humidity wallpaper.

Example  2

A moisture barrier wallpaper was prepared in the same manner as in Example 1, except that 35% by weight of the aqueous acrylic binder based on solid matter, 62% by weight of gamma alumina powder, 0.5% by weight of an aqueous emulsion dispersant, 1.5% by weight of a foaming agent and 1% .

Example  3

A moisture barrier wallpaper was prepared in the same manner as in Example 1, except that 45% by weight of the aqueous acrylic based binder, 53% by weight of gamma alumina powder, 1% by weight of the aqueous emulsion dispersant and 1% by weight of the blowing agent were used.

Example  4

A moisturizing wallpaper was prepared in the same manner as in Example 1, except that 35% by weight of PVA based on solid matter, 62% by weight of gamma alumina powder, 1% by weight of an aqueous emulsion dispersant, 1% by weight of a foaming agent and 1% .

Example  5

The composition was coated in the same manner as in Example 1, followed by drying at room temperature for 2 hours, and a humidity cooling chip was produced by a pulverizer to prepare a ceramic wallpaper.

Example  6

The composition was coated in the same manner as in Example 1, dried, and then gravure printing was performed using an aqueous ink to prepare a ceramic wallpaper.

Example  7

The composition was coated in the same manner as in Example 6, dried, and gravure printing was performed using an aqueous ink, and then the surface of the composition was subjected to an embossing process to produce a ceramic wallpaper.

Comparative Example  One

A moisturizing wallpaper was prepared in the same manner as in Example 1, except that 40% by weight of acrylic binder on solid basis, 57% by weight of alpha-alumina powder, 1% by weight of dispersant, 1% by weight of foaming agent and 1% by weight of other additives were used.

Comparative Example  2

A moisturizing wallpaper was prepared in the same manner as in Example 1 except that 62% by weight of acrylic binder on solid basis, 35% by weight of gamma alumina powder, 1% by weight of dispersant, 1% by weight of foaming agent and 1% by weight of other additives were used.

evaluation

The moisture absorptive and desorptive amounts were measured for the functional humidity wall paper prepared in Examples 1-7 and Comparative Example 1-2.

The test was conducted according to ISO 24353 and the change in weight was measured after 12 hours at 25 ° C ambient temperature and 50% relative humidity for 12 hours, ambient temperature at 25 ° C and RH relative humidity of 75% The average moisture absorption rate and the moisture absorption amount of the cycle were detected and the moisture absorptive and desorptive amount was calculated.

The evaluation results are shown in Table 1 below.

50% 12h 75% 12h 50% 12h 75% 12h 50% 12h Moisture Absorption Amount of Moisture Absorption (%) Moisture absorptive and desorptive amount per unit chip weight (g / g) Absorption and desorption amount (g / m ² ) Example 1 22.289 23.161 22.360 23.227 22.369 4.605 0.040 84.973 Example 2 23.132 24.112 23.199 24.131 23.254 6.370 0.042 92.565 Example 3 22.012 22.817 22.082 22.872 22.124 6.988 0.037 76.987 Example 4 23.512 24.318 23.571 24.381 23.601 5.507 0.035 78.575 Example 5 24.714 25.638 24.774 25.704 24.823 5.899 0.038 89.995 Example 6 24.631 25.383 24.648 25.463 24.694 3.983 0.033 76.765 Example 7 23.259 24.030 23.298 24.062 23.308 3.188 0.034 75.473 Comparative Example 1 24.937 25.092 24.940 25.099 24.972 11.016 0.006 14.840 Comparative Example 2 23.913 24.362 23.950 24.372 23.989 8.746 0.018 41.660

From the results shown in Table 1, it can be confirmed that the results of Examples 1-7 are superior to those of Comparative Example 1-2. Specifically, in Example 2, the moisture absorptive and desorbing amount per unit chip unit weight was 0.042 and the moisture absorptive and desorbing amount was 92.565. In Comparative Example 1, alpha-alumina was used and the moisture absorptive and desorptive amount was the lowest. It can be seen that the moisture-absorbing and desorbing performance is much improved when the humidity-conditioning chip including alumina is used. In Comparative Example 2, the weight range of the acrylic binder and gamma alumina is different from that of the present invention, and the moisture absorptive and desorptive amount is 41.660, which is comparatively low.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (20)

From 40 to 75% by weight of gamma alumina, from 20 to 60% by weight of an aqueous binder, from 0.1 to 5% by weight of an aqueous emulsion dispersant and from 0.5 to 5% by weight of a blowing agent
Humidification chip.
materials; And
A humidity-conditioning chip formed from a composition comprising from 40 to 75% by weight of gamma alumina, from 20 to 60% by weight of an aqueous binder, from 0.1 to 5% by weight of an aqueous emulsion dispersant and from 0.5 to 5% by weight of a foaming agent,
Humidity wallpaper.
3. The method of claim 2,
Wherein the composition has a viscosity of from 2000 to 8000 cps at < RTI ID = 0.0 > 25 C &
Humidity wallpaper.
3. The method of claim 2,
The gamma alumina is obtained by calcining a gamma alumina precursor at a temperature of 500 to 900 DEG C
Humidity wallpaper.
3. The method of claim 2,
The gamma alumina has an average particle diameter of 5 to 250 mu m
Humidity wallpaper.
3. The method of claim 2,
The gamma alumina has a mean mesopore size of 2 nm to 50 nm
Humidity wallpaper.
3. The method of claim 2,
The gamma alumina has a pore volume of 0.1 cm ³ / g to 0.3 cm ³ / g
Humidity wallpaper.
3. The method of claim 2,
Wherein the aqueous binder comprises at least one selected from the group consisting of water soluble acrylic, water soluble polyurethane, water soluble ethyl vinyl acetate, water soluble latex, water soluble epoxy, water soluble silicone emulsion and combinations thereof
Humidity wallpaper.
3. The method of claim 2,
Wherein the humidity control chip further comprises at least one organic additive selected from the group consisting of an organic pigment, an environmentally friendly solvent, a defoamer, a viscosity modifier, and combinations thereof
Humidity wallpaper.
3. The method of claim 2,
Wherein the humidity controlling chip comprises at least one inorganic additive selected from the group consisting of inorganic pigments, TiO ₂ , CaCO ₃ , Ca (OH) ₂ , CaO, Al (OH) ₃ , Al ₂ O ₃ , SiO ₂ , Further included
Humidity wallpaper.
3. The method of claim 2,
Wherein the diameter of the humidity control chip is 0.5 mm to 5 mm
Humidity wallpaper.
(a) preparing gamma alumina;
(b) preparing a composition comprising the gamma alumina, the aqueous binder, the aqueous emulsion dispersant and the foaming agent;
(c) heat-treating and pulverizing the composition to produce a humidity-conditioning chip
Method of manufacturing humidity wall paper.
13. The method of claim 12,
(d) attaching the humidity control chip to the top of the substrate
Method of manufacturing humidity wall paper.
13. The method of claim 12,
In the step (c), the composition is coated on the release film before the heat treatment and is peeled from the upper part of the release film after the heat treatment
Method of manufacturing humidity wall paper.
15. The method of claim 14,
The thickness of the coating is from 0.5 mm to 5 mm.
Method of manufacturing humidity wall paper.
15. The method of claim 14,
The basis weight of the coating is from 300 g / m ² to 1,500 g / m ²
Method of manufacturing humidity wall paper.
13. The method of claim 12,
In the step (c), the heat treatment is performed in a temperature range of 25 to 250 ° C
Method of manufacturing humidity wall paper.
13. The method of claim 12,
In the step (d), the humidity-controlling chip is attached to the upper surface of the substrate using an adhesive,
Method of manufacturing humidity wall paper.
13. The method of claim 12,
(e) forming a print layer on top of the humidity control chip
Method of manufacturing humidity wall paper.
20. The method of claim 19,
Further comprising the step of applying an embossing process to the upper side of the printing layer
Method of manufacturing humidity wall paper.

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