KR102281021B1 - Dehumidifying agent and dehumidification product for automobile headlight dew condensation prevention - Google Patents

Abstract

The present invention relates to an automobile headlight anti-condensation dehumidifier, and methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose. (carboxymethyl cellulose) a desiccant comprising at least one selected from magnesium chloride and calcium chloride, or a mixture thereof; and a curing agent comprising at least one of magnesium oxide and calcium oxide.

Description

Dehumidifying agent and dehumidification product for automobile headlight dew condensation prevention}

The present invention relates to a dehumidifying agent and dehumidifying product for preventing dew condensation in automobile headlights.

In general, problems of condensation such as headlamps, rear lamps, and fog lamps continue to occur during transportation and storage of automobiles, and industrial losses due to this are increasing.

When the temperature difference between inside and outside parts is large in a high humidity environment, such as in rain, when the lamp lens temperature is lowered, moisture inside the lamp condenses and fine water droplets form on the inner surface of the lens, causing fogging. The resulting light scattering is a major obstacle to the safe operation of automobiles.

In general, in order to solve this problem, the current automobile industry has used a method of using an anti-fogging coating agent and a bentonite-based desiccant in the lamp housing.

However, the anti-fogging coating agent is deteriorated such as whitening or flow phenomenon by outdoor ultraviolet rays, temperature and humidity, and in this case, there is a problem in that the automobile lamp module needs to be replaced.

In addition, the general bentonite-based desiccant absorbs a certain amount of moisture and then re-releases the moisture in a high-temperature and low-humidity environment when the lamp is operated, thereby causing condensation on the inner surface of the lamp lens.

As a prior art for solving this problem, there is Korean Patent Registration No. 10-1825698.

However, the prior art uses a desiccant comprising a desiccant comprising at least one selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate and a curing agent comprising at least one selected from the group consisting of calcium oxide and magnesium oxide. When moisture is absorbed, magnesia proceeds by the curing agent, and as the desiccant expands, there is a problem in that the desiccant packaging material filled with the desiccant is damaged.

In addition, as the magnesia progresses, the prior art does not absorb moisture to the inside of the desiccant, so there is a problem in that the absorption rate is lowered.

In addition, the prior art forms a round-shaped perforation in the air-permeable film to ensure air permeability, but when the air-permeable film is thermally bonded to the packaging material, the round-shaped perforation is crushed or clogged.

The technical problem to be solved by the present invention is to provide a dehumidifying agent and a dehumidifying product for preventing dew condensation in automobile headlights that do not damage the desiccant packaging material.

Another technical problem to be solved by the present invention is to provide an automobile headlight anti-condensation dehumidifying agent and dehumidifying product having an absorption rate of 160% or more.

Another technical problem to be solved by the present invention is to provide an automobile headlight anti-condensation dehumidifying agent and dehumidifying product that provide optimum air permeability for removing moisture from automobile headlights.

In order to solve the above technical problems, according to a preferred aspect of the present invention, methyl cellulose (Methyl cellulose), ethyl cellulose (ethyl cellulose), hydroxypropyl methyl cellulose (Hydroxypropyl Methyl cellulose), hydroxyethyl cellulose (Hydroxyethyl) a desiccant comprising at least one of cellulose) and carboxymethyl cellulose, and any one selected from magnesium chloride and calcium chloride, or a mixture thereof; and a curing agent comprising at least one of magnesium oxide and calcium oxide.

Here, the absorbent is the methyl cellulose (Methyl cellulose), the ethyl cellulose (ethyl cellulose), the hydroxypropyl methyl cellulose (Hydroxypropyl Methyl cellulose), the hydroxyethyl cellulose (Hydroxyethyl cellulose) and the carboxymethyl cellulose (carboxymethyl cellulose) ) at least any one of 10 to 40 wt%, any one selected from the magnesium chloride and the calcium chloride, or a mixture thereof may include 60 to 90 wt%.

Here, 60 to 90 wt% of the desiccant and 10 to 40 wt% of the curing agent may be included.

In order to solve the above technical problems, according to another preferred aspect of the present invention, a dehumidifying agent for preventing dew condensation in automobile headlights; and a desiccant packaging material filled with the vehicle headlight anti-condensation dehumidifying agent.

Here, the desiccant packaging material is polyethylene (Polyethylene, PE) or polypropylene (Polypropylene, PP), high-density polyethylene (HDPE), polyethylene and polyethylene terephthalate on a breathable film of any one of acrylic latex resin and silicone resin. Two-component non-woven fabric containing (Polyethylene terephthalate, PET) component, paper, or cloth, which is any one of breathable packaging materials, can be thermally bonded.

Here, the air permeable film may have a hole in accordance with the air permeability.

Here, the air permeability may be 800 ~ 1500g / 24hr / m ² .

The present invention has the effect of not damaging the desiccant packaging material by controlling the viscosity of magnesia.

In addition, the present invention can control the viscosity of magnesia and disperse the curing agent, thereby absorbing moisture to the inside of the desiccant, thereby ensuring a high absorption rate and a constant moisture absorption rate.

In addition, the present invention has an effect of providing an optimal air permeability for removing moisture from the headlights of automobiles.

1 is a perspective view of an automobile headlight anti-condensation dehumidifying product according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents or substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but other components may exist in between. It should be understood that there is On the other hand, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as 'comprise' or 'have' are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Car headlight anti-condensation dehumidifier according to an embodiment of the present invention is methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxy At least one of methyl cellulose (carboxymethyl cellulose) and magnesium chloride (magnesium chloride) and calcium chloride (calcium chloride), or a desiccant containing any one or a mixture thereof, magnesium oxide (magnesium oxide) and calcium oxide (calcium oxide) ) and a curing agent comprising at least any one of.

At least one of methyl cellulose, ethyl cellulose, hydroxypropyl Methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose among the desiccant is a curing agent It can be dispersed to maintain a constant moisture absorption.

In addition, at least one of methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose has a viscosity It not only prevents the packaging material filled with the desiccant from being damaged due to the progress of magnesia by the curing agent during the moisture absorption process, but also improves the moisture absorption rate by allowing moisture to be absorbed into the inside of the desiccant.

Calcium chloride in the desiccant has a purity of about 90% to about 95%, and can absorb moisture in the atmosphere by about 150% to about 350%.

Of the desiccant, magnesium chloride has a moisture absorption rate of about 150 to 200%, although there are differences by characteristics.

Here, when calcium chloride and magnesium chloride are mixed among the desiccant, excellent moisture absorption may be maintained and the moisture absorbed may not be released again.

A curing agent made of at least one of magnesium oxide and calcium oxide absorbs a small amount of moisture, and promotes deliquescent properties of calcium chloride and magnesium chloride to increase moisture absorption.

Desiccant according to an embodiment of the present invention is methyl cellulose (Methyl cellulose), ethyl cellulose (ethyl cellulose), hydroxypropyl methyl cellulose (Hydroxypropyl Methyl cellulose), hydroxyethyl cellulose (Hydroxyethyl cellulose) and carboxymethyl cellulose (carboxymethyl cellulose) ) at least any one of 10-40 wt%, it is preferable to include any one selected from magnesium chloride and magnesium oxide (magnesium oxide) or a mixture thereof 60 to 90 wt%.

The dehumidifying agent for preventing dew condensation in a vehicle headlight according to an embodiment of the present invention preferably includes 60 to 90 wt% of a desiccant and 10 to 40 wt% of a curing agent.

The anti-condensation dehumidifying agent for automobile headlights according to an embodiment of the present invention can absorb more than 160% moisture for 7 days at a temperature of 40°C, a relative humidity of 90% or a temperature of 50°C and a relative humidity of 95%.

1 is a perspective view of an automobile headlight anti-condensation dehumidifying product according to an embodiment of the present invention.

Referring to FIG. 1 , the vehicle headlight anti-condensation dehumidifying product 100 includes a desiccant packaging material 110 and a vehicle headlight anti-condensing dehumidifying agent 120 .

The desiccant packaging material 110 includes the breathable packaging materials 110-1 and 110-3 and the breathable films 110-2 and 110-4, and the dehumidifying agent packaging material 110 is filled with a dehumidifier 120 for preventing dew condensation in the automobile headlight. to form a dehumidifying product 100 for preventing dew condensation in the automobile headlight.

In addition, the desiccant packaging material 110 is formed by thermally bonding the breathable packaging materials 110-1 and 110-3 and the breathable films 110-2 and 110-4.

The breathable packaging materials 110-1 and 110-3 are breathable to allow the automobile headlight anti-condensation dehumidifier 120 to absorb moisture while protecting the breathable films 110-2 and 110-4.

In addition, the breathable packaging material (110-1, 110-3) is a high-density polyethylene (HDPE), polyethylene and polyethylene terephthalate (Polyethylene terephthalate, PET) containing a two-component nonwoven fabric, paper, and any one of the cloth. .

Here, the breathable packaging materials 110-1 and 110-3 are preferably a two-component nonwoven fabric containing polyethylene and polyethylene terephthalate (PET) components, and the polyethylene component of the breathable packaging materials 110-1 and 110-3. It is melted by this heat to allow thermal bonding with the breathable films 110-2 and 110-4, and the polyethylene terephthalate component of the breathable packaging materials 110-1 and 110-3 protects the breathable film 110-2 from external impact. , 110-4). In addition, since the polyethylene terephthalate component of the air-permeable packaging materials 110-1 and 110-3 has heat resistance, the shape of the air-permeable packaging materials 110-1 and 110-3 can be maintained even after thermal bonding.

Breathable films (110-2, 110-4) are polyethylene (Polyethylene, PE) or polypropylene (Polypropylene, PP), acrylic latex resin, and any one of silicone resin holes (110-5, 110-6) are drilled.

Holes (110-5, 110-6) are formed by drilling the breathable films (110-2, 110-4) in accordance with the optimum air permeability of 800 ~ 1500g/24hr/m ^{2 to remove the moisture of the automobile headlight.} Here, the holes 110-5 and 110-6 formed by drilling the breathable films 110-2 and 110-4 can be formed in various shapes such as straight lines, squares, etc. can be formed.

Car headlight anti-condensation dehumidifier 120 is methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose. ) 60 to 90 wt% of a desiccant containing at least one of and any one selected from magnesium chloride and calcium chloride or a mixture thereof, magnesium oxide and calcium oxide ) contains 10 to 40 wt% of a curing agent containing at least one of, and absorbs moisture vented through the desiccant packaging material 110 .

Hereinafter, the present invention will be described in more detail based on an experimental example of an automobile headlight anti-condensation dehumidifying product according to an embodiment of the present invention.

The desiccant packaging material of the experimental example is a two-component nonwoven breathable packaging material (110-1, 110-3) containing polyethylene and polyethylene terephthalate (PET) components and polyethylene ( Polyethylene, PE) breathable films (110-2, 110-4) are heat-bonded.

Experimental Example 1 note Early 1 day 2 days 3 days 4 days 5 days 6 days 7 days Example 1 Weight (g) 36.8 52.4 62.4 70.1 75.5 80.8 87.2 90.1 moisture absorption 0% 42% 70% 90% 105% 120% 137% 145% Example 2 Weight (g) 36.8 54.3 65.9 70.3 81.5 86.4 91.9 95.6 moisture absorption 0% 48% 79% 91% 121% 135% 150% 160% Example 3 Weight (g) 36.8 55.4 67.3 75.5 82.5 87.8 93.1 96.8 moisture absorption 0% 51% 83% 105% 124% 139% 153% 163% Example 4 Weight (g) 36.8 56.1 68.2 76.3 83.3 88.8 95.4 98.7 moisture absorption 0% 52% 85% 107% 126% 141% 159% 168% Example 5 Weight (g) 36.8 59.1 71.3 79.5 86.3 92.5 98.3 102.4 moisture absorption 0% 61% 94% 116% 135% 151% 167% 178%

Experimental Example 1 of [Table 1] is the result of observing the moisture absorption rate of automobile headlight anti-condensation dehumidifying products at a temperature of 50 °C and a relative humidity of 95% atmosphere for 7 days.

The anti-condensation dehumidifying product for automobile headlights of Experimental Example 1 in [Table 1] is a product in which a dehumidifying agent packaging material is filled with an automobile headlight anti-condensation dehumidifying agent composed of 75 wt% of a desiccant and 25 wt% of a curing agent.

In Examples 1 to 5, the weight of the desiccant and the curing agent is the same, and the weight of the material included in the desiccant is different and compared and compared.

Specifically, Examples 1 to 5 are methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose. ), 5 wt%, 10 wt%, 25 wt%, 40 wt%, 45 wt%, and magnesium chloride weight of 95 wt%, 90 wt%, 75 wt%, 60 A moisture absorbent of wt%, 55 wt% was used, and magnesium oxide was used as a curing agent.

Comparing Examples 1 to 5, it can be seen that Example 1 does not have a moisture absorption of 160%, which is relatively low, and Example 5 has good moisture absorption, but it can be confirmed that a problem of water generation occurs.

Experimental Example 2 of [Table 2] shows that the automobile headlight anti-condensation dehumidifying products filled with the dehumidifying agent packaging material with different weights of the desiccant and the dehumidifying agent were subjected to moisture absorption for 7 days at a temperature of 50°C and a relative humidity of 95% atmosphere. It is the result of observing the rate.

Here, the absorbent is methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose. Any one containing 25 wt% and 75 wt% of magnesium chloride was used, and magnesium oxide was used as the curing agent.

Experimental Example 2 note Early Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Example 6 Weight (g) 36.8 53.6 61.7 65.1 67.4 68.8 69.9 70.7 moisture absorption 0% 46% 68% 77% 83% 87% 90% 92% Example 7 Weight (g) 36.8 55.4 67.3 75.5 82.5 87.8 93.1 96.8 moisture absorption 0% 51% 83% 105% 124% 139% 153% 163% Example 8 Weight (g) 36.8 61.7 77.1 85.3 91.6 96.9 101.5 105.2 moisture absorption 0% 68% 110% 132% 149% 163% 176% 186%

Example 6 is a desiccant 55 wt%, curing agent 45 wt%, Example 7 is a desiccant 75 wt%, curing agent 25 wt%, Example 8 is a car headlight consisting of 95 wt% desiccant and 5 wt% curing agent Anti-condensation It is the result of moisture absorption rate of dehumidifying products for automobile headlight anti-condensation in which the desiccant is filled in the desiccant packaging material.

Referring to Experimental Example 2 of [Table 2], as in Example 6, when the curing agent exceeds 40 wt%, the moisture absorption is lowered, and when the curing agent does not exceed 5 wt%, the moisture absorption is good, but it can be confirmed that the problem of water generation occurs.

Experimental Example 3 of [Table 3] is an automobile headlight anti-condensation dehumidifying product filled with a dehumidifying agent packaging material of Example 3, which is an embodiment of the present invention, and a conventional product at a temperature of 50° C. and a relative humidity of 95% It is the result of observing the moisture absorption rate for 7 days in the atmosphere

Experimental Example 3 note Early Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 comparative example Weight (g) 36.6 59.2 71.3 76.9 81.1 83.9 86.3 88.5 moisture absorption 0% 62% 95% 110% 122% 129% 136% 142% damage
Whether X X X X X X O O Example 3 Weight (g) 36.8 55.4 67.3 75.5 82.5 87.8 93.1 96.8 moisture absorption 0% 51% 83% 105% 124% 139% 153% 163% damage
Whether X X X X X X X X

In Experimental Example 3 of [Table 3], Example 3 is methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose (Hydroxyethyl cellulose) and carboxymethyl cellulose (carboxymethyl cellulose) Car headlight containing 25 wt% of any one selected from 25 wt% and 75 wt% of a desiccant containing 75 wt% of magnesium chloride, and a car headlight anti-condensation dehumidifying agent containing 25 wt% of a magnesium oxide curing agent A car headlight filled with a desiccant packaging material It is a dehumidifying product that prevents condensation

A comparative example is an automobile headlight anti-condensation dehumidifying product in which a desiccant packaging material is filled with an automobile headlight anti-condensation dehumidifier containing 75 wt% of a magnesium chloride desiccant and 25 wt% of a magnesium oxide curing agent.

When comparing the car headlight anti-condensation dehumidifying product in which the car headlight anti-condensation dehumidifying agent of Example 3, which is an embodiment of the present invention, is filled in the dehumidifying agent packaging material and the comparative example, the comparative example has a good moisture absorption rate at the beginning, but from the 4th day onwards Example 3 It can be confirmed that this moisture absorption is more excellent, and it can be seen that the packaging material is also damaged from the 6th day in the comparative example, but is not damaged in Example 3.

In the case of the comparative example, when moisture is absorbed, the desiccant expands as magnesia progresses by the curing agent and damages the desiccant packaging material filled with the desiccant, but in Example 3, the desiccant contains methyl cellulose, ethyl cellulose, and hydride. It contains any one selected from among hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose to control the viscosity of magnesia so as not to damage the desiccant packaging material filled with the desiccant. .

In addition, in Comparative Example, as magnesia progresses, moisture is not absorbed to the inside of the desiccant, but in Example 3, the desiccant contains methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose (Hydroxypropyl Methyl cellulose), hydroxyethyl Because it contains any one selected from cellulose (Hydroxyethyl cellulose) and carboxymethyl cellulose (carboxymethyl cellulose), it can control the viscosity of magnesia and disperse the curing agent so that moisture can be absorbed to the inside of the desiccant.

Experimental Example 4 of [Table 4] is an automobile headlight anti-condensation dehumidifying product filled with the dehumidifying agent packaging material of Example 3, which is an embodiment of the present invention, and a comparative example, a conventional product, at a temperature of 23 ° C. and relative humidity. This is the result of measuring the release rate by adsorbing moisture at 50% for 48 hours and drying it in an oven at 70° C. for 2 hours.

Experimental Example 4 note comparative example Example 3 Early Weight (g) 36.92 36.78 after 48 hours Weight (g) 42.23 42.23 after drying Weight (g) 42.13 42.13 moisture absorption 14% 15% release rate 0.24% 0.24%

Referring to Experimental Example 4 of [Table 4], it can be confirmed that Example 3 has a better moisture absorption rate than Comparative Example and has the same release rate as Comparative Example. Here, the dehumidification product for preventing dew condensation in automobile headlights must have a release rate of 0% or more and less than 5% in order to sustain moisture absorption and release for more than one year.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will understand that various modifications and equivalent ranges of embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention should be defined by the following claims.

110: desiccant packaging material 120: desiccant

Claims (7)

Methyl cellulose, ethyl cellulose
cellulose), hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and at least one of carboxymethyl cellulose, and magnesium chloride and calcium chloride selected from a desiccant comprising any one or a mixture thereof; and
A curing agent comprising at least one of magnesium oxide and calcium oxide;
The absorbent is the methyl cellulose (Methyl cellulose), the ethyl cellulose (ethyl cellulose), the hydroxypropyl methyl cellulose (Hydroxypropyl Methyl cellulose), the hydroxyethyl cellulose (Hydroxyethyl cellulose) and the carboxymethyl cellulose (carboxymethyl cellulose) Any one 10-40 wt%, any one selected from the magnesium chloride and the calcium chloride (calcium chloride), or a mixture thereof containing 60-90 wt%,
60 to 90 wt% of the absorbent and 10 to 40 wt% of the curing agent
Car headlight anti-condensation dehumidifier characterized in that.
delete delete The anti-condensation dehumidifier for automobile headlights of claim 1; and
a desiccant packaging material filled with the automobile headlight anti-condensation dehumidifying agent;
containing
Car headlight anti-condensation dehumidifying product characterized by
5. The method of claim 4,
The desiccant packaging material is polyethylene (Polyethylene, PE) or polypropylene (Polypropylene, PP), high-density polyethylene (HDPE), polyethylene and polyethylene terephthalate (Polyethylene) on a breathable film of any one of acrylic latex resin and silicone resin. Two-component non-woven fabric containing terephthalate (PET) ingredients, paper or cloth, which is a breathable packaging material that is thermally bonded
Car headlight anti-condensation dehumidifying product characterized by
6. The method of claim 5,
The breathable film has a hole in it according to the air permeability
Car headlight anti-condensation dehumidifying product characterized by
7. The method of claim 6,
The air permeability is 800~1500g/24hr/m ²
Car headlight anti-condensation dehumidifying product characterized by

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