KR101530273B1 - Desiccant having humidity indicating function and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a dehumidifying agent, wherein a feature of the dehumidifying agent includes a pouch containing a dehumidifying member, and a humidity indicator located on the outer surface of the pouch and changing color when the dehumidifying member is in a saturated state, The display portion contains 25 to 50 wt% of cobalt bromide, copper bromide, 25 to 50 wt% of polypropylene glycol, and 10 to 30 wt% of glycerin. As a result, the humidity indicator portion that does not contain the environmentally regulated substance is harmless to the human body, and the user can determine the humidifying state and replacement timing of the humidifying agent using the color of the humidity indicator attached to the wrapping paper of the humidifier, And the user's convenience is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desiccant having a humidity display function,

The present invention relates to a dehumidifying agent having a humidity display function and a method for producing the same.

Generally, the dehumidifying agent absorbs moisture in the atmosphere by using a dehumidifying member to lower the humidity around the dehumidifying agent.

In order to protect humidity-sensitive products from humidity, JEDEC (Joint Electron Device Engineering Council) is to provide moisture-sensitive products such as semiconductors and printed circuit boards (PCBs) Humidity indicator indicating the humidity information inside the package is enclosed.

In the dehumidifier disclosed in Korean Patent No. 10-0949815, a humidity indicator is attached to the outside of the wrapping paper to determine the replacement time of the dehumidifying agent.

The humidity indicator shown in Korean Patent No. 10-0949815 contains cobalt chloride, polyvinyl alcohol, clay, glue and the like. Depending on the moisture absorption state of the dehumidifying agent , Cobalt chloride is blue when it does not absorb water and changes to pink when it absorbs water.

Accordingly, the degree of humidification of the desiccant is determined by using the color of the cobalt chloride so that the user can know the replacement time of the desiccant.

However, in the European Union in 1998, the European Commission Directive 98/98 / EC, the 25th technical regulation of the European Council Directive 67/548 / EEC, Inducing substances: There is no data on the human body, but it refers to substances that have carcinogenic records after inhalation of the animal. If the content of cobalt chloride in the product is more than 0.01%, it should be marked as 'R49').

The Substances of Very High Concern (SVHC) regulated by the Regulation (EC) No.1907 / 2006 of the REACH (Registration, Evaluation and Authorization of Chemicals) regulation of the European Chemicals Agency (ECHA) As of December 19, 2012, the list of substances is going to be added to 138 species in the future. Since the cobalt chloride is included in this list, it has a strong regulatory basis, so import and export of products using cobalt chloride is regulated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art.

According to an aspect of the present invention, a dehumidifying agent having a humidity display function includes a pouch containing a dehumidifying member, and a humidity indicator located on the outer surface of the pouch and changing color when the dehumidifying member is in a saturated state, The display portion includes 25 to 50 wt% of cobalt bromide, copper bromide, 25 to 50 wt% of polypropylene glycol, and 10 to 30 wt% of glycerin.

 According to an aspect of the present invention, there is provided a method of manufacturing a desiccant having a humidity display function, the method comprising: preparing an indicator solution by dissolving 5 to 25% by weight of cobalt bromide or copper bromide in 50 to 80% by weight of ethanol, Adding a 25% by weight polypropylene glycol and 5 to 10% by weight glycerin to dissolve the mixture to prepare a humidity indicating ink, applying the humidity indicating ink to the pouch member, A step of sealing the pouch member coated with the humidity indicator ink to form a pouch opening member partially opened, a step of embedding a dehumidifying member in the pouch opening member through the opened part, And sealing the portion of the open pouch opening to complete the pouch.

 The humidity indicating ink may be applied to the outer surface of the pouch member through gravure printing.

According to this feature, the humidity indicator for monitoring the ambient humidity is manufactured by using cobalt bromide or copper bromide instead of cobalt chloride, which is a substance to be regulated by the environment, so that safety of the user is improved.

Further, since the user can determine the humidifying state and replacement timing of the humidifying agent using the color of the humidity indicator attached to the wrapping paper of the humidifying agent, unnecessary use of the humidifying agent can be reduced and the user's convenience can be improved.

1 is a plan view of a desiccant having a humidity display function according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the dehumidifier having the humidity display function shown in Fig. 1 cut along the line II-II. Fig.
3 is a flowchart illustrating a method of manufacturing a desiccant having a humidity display function according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Hereinafter, a dehumidifier having a humidity display function and a method for manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the drawings.

In the following description, a desiccant having a humidity display function is described as a desiccant.

1 and 2, a dehumidifying agent 1 according to an embodiment of the present invention includes a pouch 20 having a space in which a dehumidifying member 10 is installed, And an attached humidity indicator 30.

The dehumidifying member 10 is made of at least one material of diatomite, silica gel and bentonite, and absorbs moisture.

In this example, a state in which the dehumidifying member 10 has reached the limit for absorbing moisture and is no longer able to absorb moisture is referred to as a saturated state.

The pouch 20 is made of one or more of paper, nonwoven fabric, polypropylene (PP), and polyethylene (PE).

The pouch 20 is excellent in air permeability so that moisture in the air is absorbed into the dehumidifying member 10 in the pouch 20. [

Therefore, when the pouch 20 is made of polypropylene or polyethylene, the pouch 20 can have a plurality of pores, whereby external moisture is absorbed into the dehumidifying member 10 through the pores.

The humidity indicator 30 is composed of cobalt bromide, copper bromide, polypropylene glycol, and glycerin.

At this time, cobalt bromide or copper bromide has 25 to 50 wt%, polypropylene glycol has 25 to 50 wt%, and glycerin has 10 to 30 wt%.

Cobalt bromide or copper bromide has the property that when the moisture is absorbed, the color discolors from the initial color to the predetermined color.

The cobalt bromide or copper bromide exhibits an initial color due to the fact that the dehumidifying member 10 does not absorb moisture in the air when the dehumidifying member 10 absorbs moisture. In the saturated state in which the dehumidifying member 10 can no longer absorb moisture, And is therefore used as a humidity indicator for indicating the humidifying state of the dehumidifying member 10. [

That is, cobalt bromide exhibits an initial color of blue when the state of the dehumidifying member 10 is below the saturated state, and changes to pink when the state of the dehumidifying member 10 is saturated, by absorbing moisture.

Further, copper bromide shows an initial color of brown when the state of the dehumidifying member 10 is below the saturated state, and changes to green when the state of the dehumidifying member 10 is saturated, by absorbing moisture.

Accordingly, when the state of the dehumidifying member 10 is saturated, the humidity display unit 30 absorbs moisture and changes from the initial color to each set color (for example, pink or green).

Since the remaining materials such as cobalt bromide, copper bromide, and polypropylene glycol and glycerin are also not environmentally regulated, the humidity indicator 30 made of these materials has an eco-friendly humidity indicator which is harmless to the human body Thereby improving the stability of the user.

Polypropylene glycol is an environmentally friendly hydrophilic thickener of a polymer compound. When the humidity indicator 30 is printed on the outer surface of the pouch 20 by gravure printing, the adhesive strength to the outer surface of the pouch 20 is maintained, So that the humidity indicator 30 is attached to the outer surface of the pouch 20.

Glycerin is a hydrophilic hygroscopic material that absorbs moisture around it. The rate at which glycerin absorbs moisture is faster than the rate at which the humidity indicator (ie, cobalt bromide or copper bromide) absorbs moisture, so glycerin is added The humidity indicator increases the rate at which moisture is absorbed.

Accordingly, the content of glycerin is controlled to control the speed and range at which the humidity indicator 30 reacts with moisture.

In this example, when the dehumidifying member 10 is in a saturated state where it can no longer absorb moisture, the content of the glycerin is adjusted such that the humidity indicator 30 easily absorbs moisture in the air and discolors.

Therefore, when the dehumidifying member 10 absorbs moisture, it absorbs moisture of the humidity indicator 30 located just above the dehumidifying member 10, so that the humidity indicator 30 remains dry, When the state is a saturated state in which no further moisture absorption is performed, the humidity display section 30 absorbs moisture in the atmosphere, and the hue changes in the initial hue.

The humidity indicator 30 is printed on the outer surface of the pouch 20 through gravure printing.

Thus, the degree of humidification of the dehumidifying member 10 is determined using the hue of the humidity indicator 30 attached to the pouch 20, so that the user can accurately determine the replacement time of the dehumidifying agent 1, (1) is prevented from being wasted.

Referring to FIG. 3, a method for producing such a dehumidifying agent (1) will be described below.

First, 5 to 25% by weight of cobalt bromide or copper bromide is dissolved in 50 to 80% by weight of ethanol at a temperature of 15 to 25 캜 to prepare a labeling solution.

Then, 10 to 25% by weight of polypropylene glycol and 5 to 10% by weight of glycerin are added to this indicator liquid and dissolved to prepare a humidity indicator ink (100).

As described above, polypropylene glycol is used as a thickener to increase the adhesion with the surface to which the humidity indicating ink is applied.

When the content of polypropylene glycol is 10% by weight or more, the adhesion of the humidity indicator ink is stably maintained so that the humidity indicator ink stably spreads on the desired surface and does not fall off the surface. When the content of the polypropylene glycol is 25% A stable printing operation is performed.

Glycerin is a hydrophilic hygroscopic material that adjusts the water absorption amount for discoloration of the humidity indicator 30 and allows the components of the humidity indicator ink to be mixed with each other as a surfactant.

When the content of glycerin is 5 wt% or more, when the state of the dehumidifying member 10 reaches a saturated state, the humidity indicator 30 starts to cause discoloration in the base color in response to moisture, and when the content of glycerin is 10 wt% The discoloration of the humidity display section 30 stably progresses and the set hue appears.

Ethanol is a hydrophilic solvent that dissolves components such as cobalt bromide, copper bromide, polypropylene glycol, and glycerin to make the ink uniform, and has volatility, which makes it easy to dry after gravure printing.

When the amount of the ethanol is 50 wt% or more, the humidity indicator and the additives are completely dissolved to make the ink uniform, so that the printing quality is improved. When the ethanol is 80 wt% or less, the color of the humidity indicator is clear, do.

Next, the manufactured humidity indicating ink is applied to a part of the outer surface of the pouch member by gravure printing (200).

Then, the humidity indicating ink applied to the outer surface of the pouch member is dried to cause the initial color to be expressed (300).

In this case, the drying time may be 10 minutes when the drying temperature is 15 ° C to 25 ° C, or the drying time may be 5 minutes when the drying temperature is 50 ° C to 60 ° C.

A pouch opening member having one side opened by a pouch member is formed by using an adhesive or a heat treatment (400).

In this example, the pouch opening body is formed by a first pouch member to which the humidity display unit 30 is not applied and a second pouch member to which the humidity display unit 30 is applied in accordance with the method described above, And is manufactured using a pouch member.

That is, after the first and second pouch members are brought into contact with each other so as to expose the humidity indicator 30 to the outside, they are removed by a method such as 3-way heat- And all the remaining edge portions are sealed to manufacture a pouch opening body having a space in which the dehumidifying member 10 is embedded.

At this time, the first and second pouch members have the same shape and size, and the first and second pouch members are sealed so that the humidity indicator 30 is exposed to the outside.

Further, the edge portion which is not sealed but opened becomes an injection port into which the dehumidifying member 10 is injected.

Alternatively, the pouch opener may be manufactured using only one pouch member to which the humidity indicator 30 is applied.

That is, one pouch member is folded in half to expose the humidity indicator 30 to the outside, and the edge portions contacting each other are sealed so as to open only one of them to open the pouch opening with a space in which the dehumidifying member 10 is built- Body.

After the dehumidifying member 10 is built in the inner space of the pouch opening body thus formed (500), the inner dehumidifying member 10 leaks to one side of the opened pouch opening body using a heat bonding method or an adhesive agent And the pouch 20 is formed by sealing to prevent it from coming out (600).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1: dehumidifying agent 10: dehumidifying member
20: Pouch 30: Humidity indicator

Claims (3)

A pouch containing a dehumidifying member, and
And a humidity indicator which is located on an outer surface of the pouch and changes color when the dehumidifying member is in a saturated state,
Lt; / RTI >
The humidity indicator includes 25 to 50 wt% of cobalt bromide or copper bromide, 25 to 50 wt% of polypropylene glycol, and 10 to 30 wt% of glycerin
And a humidity indicator function. Preparing a humidity indicating ink by mixing 50 to 80% by weight of ethanol, 5 to 25% by weight of cobalt bromide or copper bromide, 10 to 25% by weight of polypropylene glycol and 5 to 10% by weight of glycerin,
Applying the humidity indicating ink to the pouch member,
Drying the humidity indicating ink applied to the pouch member,
Sealing the pouch member coated with the humidity indicating ink to form a partially open pouch opening,
Embedding a dehumidifying member in the inside of the pouch opening through the opened part, and
Sealing the portion of the opened pouch opening to complete the pouch
And a humidity indicator function. 3. The method of claim 2,
Wherein the humidity indicator ink has a humidity display function to be applied to an outer surface of the pouch member through a gravure printing method.

Images