KR20240131663A - Integrated Desiccant Dust Cover - Google Patents

Abstract

The present invention relates to an integrated desiccant dust cover. Specifically, the present invention provides an integrated desiccant dust cover including: a housing having a space formed therein and one side or side open; a hollow pillar formed at the top of the interior of the housing, and a desiccant installed inside the housing; a breathable film joined to one side of a partition wall of the housing and one side of the hollow pillar partition wall; and a perforated outer cover joined to an upper hollow portion of the hollow pillar on one side of the breathable film to protect the interior space of the housing.

Description

{Integrated Desiccant Dust Cover}

The present invention relates to an integral desiccant dust cover.

In general, moisture-absorbing products are widely used in packaging boxes to protect products from moisture during packaging or transportation, and have also been widely used in products that require humidity control, such as automobile lamps and electronic products.

The above-mentioned moisture absorbing products are mainly used in the form of products in which the moisture absorbent is placed in a pouch, and for special purposes, products in which the moisture absorbent is included in the internal storage space of a dust cover container and covered with a breathable film (registration number 10-2245735 B1) are used.

The breathable film included in the above-mentioned absorbent product must have excellent breathability to effectively absorb external moisture, while at the same time controlling the absorption rate, so that the above-mentioned absorbent product can effectively absorb surrounding moisture for a long period of time.

The absorbent contained in the receiving space of the dust cover expands as it absorbs moisture, and the expanded absorbent protrudes the breathable film toward the inside of the automobile lamp. In this way, the protruding breathable film comes into contact with components such as a light source lamp installed inside the automobile lamp, and as a result, the breathable film may be damaged, or components such as a light source lamp installed inside the automobile lamp that come into contact with the breathable film may be damaged.

In addition, the connection between the housing of the breathable film and the dust cover and the bulkhead is bonded using heat or adhesive, etc., and problems such as the bonded portion coming off due to vibration or external physical factors, causing the internal desiccant to be discharged, may occur.

The present invention provides a dust cover for an automobile lamp that effectively removes moisture inside the automobile lamp.

In addition, the present invention prevents the breathable film of a dust cover for an automobile lamp from being torn due to external impact or the like, or from expanding outward due to expansion of a moisture absorbent.

In addition, the present invention prevents the joint portion of the housing partition of the breathable film and the dust cover from being separated due to external impact or vibration.

According to one aspect of the present invention, an integrated desiccant dust cover is provided, comprising: a housing having a space formed therein and having one or more open sides; a breathable film; a perforated outer cover; and a desiccant.

According to one aspect of the present invention, a housing having a space formed inside and one side or side open may be included; a hollow pillar having an upper portion formed inside the housing, a desiccant installed inside the housing; a breathable film joined to one side of a partition wall of the housing and one side of a hollow pillar partition wall; and a perforated outer cover joined to one side of the breathable film and an upper hollow portion of the hollow pillar to protect the inner space of the housing.

According to one aspect of the present invention, the housing may further include a sponge.

According to one aspect of the present invention, the perforated outer cover may include a hanging structural pillar.

According to one aspect of the present invention, the upper part of the hollow column of the housing may be connected to a hanging structure column of a perforated outer cover.

According to one aspect of the present invention, the hollow pillar of the housing may be installed at the center of the inside of the housing.

According to one aspect of the present invention, the perforated outer cover may have a hanging structural pillar installed in the center.

According to one aspect of the present invention, the perforated outer cover may include a plurality of perforations, and the perforations may extend radially.

According to one aspect of the present invention, the perforated outer cover may include a straight crossbar and a cylindrical crossbar between the perforations.

According to one aspect of the present invention, the perforated outer cover may have a perforation ratio of 10 to 60% relative to the entire outer cover.

According to one aspect of the present invention, the perforated outer cover may be circular.

According to one aspect of the present invention, the housing may be cylindrical.

According to one aspect of the present invention, the desiccant may include a solidified desiccant, a gel-type desiccant, or a mixed desiccant thereof.

According to one aspect of the present invention, the solidified moisture absorbent may include at least one or two or more moisture absorbents selected from the group consisting of magnesium chloride, calcium chloride, and sodium carbonate; a curable inorganic material including at least one or more selected from the group consisting of magnesium oxide and calcium oxide; and an alkali metal phosphate.

According to one aspect of the present invention, the gel-type desiccant may include at least one absorbent material selected from the group consisting of magnesium chloride and sodium carbonate; a hygroscopic copolymer selected from polyacrylate and polyacrylate metal salts; and starch.

According to one aspect of the present invention, the moisture absorption rate of the integrated desiccant dust cover may be 50% or more compared to the moisture absorption rate of a dust cover for an automobile lamp from which the perforated outer cover has been removed.

The integrated moisture absorbent dust cover according to the present invention prevents the moisture absorbent film from expanding due to moisture absorbent expansion and from being damaged by external impact by installing a perforated outer cover on the upper surface of the moisture absorbent film, while at the same time providing the effect of having a moisture absorption rate above a certain level.

In addition, the integrated desiccant dust cover according to the present invention can prevent the joint portion between the breathable film and the partition wall of the housing of the integrated desiccant dust cover from being separated due to external impact or vibration, etc.

Figure 1 is a schematic diagram of the entire integrated desiccant dust cover.
Figure 2 is an image showing a cross-section of an integrated desiccant dust cover.
Figure 3 is an image of a perforated outer cover of a dust cover of an integral desiccant type.
Figure 4 is an image of the housing of a dust cover of an integrated desiccant type.
Figure 5 is an image of a perforated outer cover of another embodiment of an integral desiccant dust cover.
Figure 6 is an image of the housing of another embodiment of the dust cover of the integral desiccant.
Figure 7 is a schematic drawing of each component of the integrated desiccant dust cover.
Figure 8 is a schematic drawing of each component of the integrated desiccant dust cover.

Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those with ordinary skill in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are assigned similar drawing reference numerals throughout the specification.

Throughout this specification, when it is said that an element is “on” another element, this includes not only cases where the element is in contact with the other element, but also cases where there is another element between the two elements.

Throughout this specification, when a part is said to "include" a certain component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated. The terms "about," "substantially," and the like, as used throughout this specification, are used to mean at or near the numerical values inherent in the stated meanings, when manufacturing and material tolerances are presented, and are used to prevent unscrupulous infringers from unfairly exploiting disclosures that state precise or absolute values to aid the understanding of this specification. The terms "step of doing" or "step of" as used throughout this specification do not mean "step for."

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings and the contents described below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numerals represent like elements throughout the specification.

Hereinafter, the configuration of an integrated desiccant dust cover according to one embodiment of the present invention will be described.

Referring to FIG. 7, the present invention provides an integrated desiccant dust cover including a housing (300) having a space formed inside and one or more open sides; a breathable film (200); a perforated outer cover (100); and a desiccant.

According to one aspect of the present invention, with reference to FIGS. 4 and 7, the present invention may include: a housing (300) having a space formed therein and one or more open sides; a hollow pillar (310) formed at the top of the interior of the housing, a desiccant installed inside the housing; a breathable film (200) joined to one side of a partition wall (320) of the housing and one side of a hollow pillar partition wall (330); and a perforated outer cover (100) joined to an upper hollow portion of the hollow pillar on one side of the breathable film to protect the interior space of the housing.

Describes housing (300).

The housing (300) forms the exterior of the integral desiccant dust cover (1000) and may be configured to have a space formed inside and one side open.

Figure 4 is a drawing illustrating a housing.

Specifically, referring to FIG. 4, the housing (300) includes a lower surface and a side surface so that a space is formed inside, and the upper surface can be opened.

The lower surface may be formed flat, and the side surfaces may be formed in various shapes. Specifically, the housing may be formed in a shape of a polygon, an ellipse, or a circle with a cross section parallel to the lower surface. Specifically, the shape of the housing may be cylindrical, but is not limited thereto.

The inside of the above housing may be formed with a hollow pillar (310) that penetrates the upper portion, and the hollow pillar (310) that penetrates may be single as in FIG. 4 or may be multiple as in FIG. 6, and a hollow pillar partition (330) may be combined on the upper portion of the hollow pillar (310) and a breathable film (200) may be combined on one side of the partition (320) of the housing.

According to one aspect of the present invention, the hollow pillar (310) of the housing may be installed inside the housing (300), and as shown in FIG. 4, the hollow pillar (310) may be installed in the center inside the housing (300), or may be installed in multiple pieces as shown in FIG. 6, but is not limited thereto.

Meanwhile, although not shown in the drawing, the housing may be configured to be coupled to an automobile lamp. For example, the housing may have a first screw thread on its outer surface to be screw-coupled to an automobile lamp having a second screw thread. By coupling the housing to the automobile lamp in this manner, the dust cover for the automobile lamp may be installed on the automobile lamp.

Next, the perforated outer cover (100) will be described.

According to one aspect of the present invention, the perforated outer cover (100) may be circular, but is not limited thereto as long as the cross-section parallel to the lower surface of the housing (300) has a shape identical to any one of a polygon, an ellipse, and a circle.

The above-mentioned perforated outer cover (100) and housing (300) are fixed, and the method of fixing is not particularly limited. Specifically, the perforated outer cover (100) includes a perforated pillar of the same material in the center, and the housing (300) includes a hollow pillar that can be combined with the perforated pillar, and these can be combined and fixed by high-frequency fusion or heat fusion. The heat fusion can adopt an ultrasonic fusion method, but is not limited thereto.

Additionally, the connection between the outer cover (100) and the housing (300) that are connected in another manner may be a screw connection, but is not limited thereto.

In addition, it can be fixed in a component joint form between the perforated outer cover (100) and the housing (300) in another way, and the component joint form will be described in detail.

According to one aspect of the present invention, the perforated outer cover (100) can physically connect the housing (300) and the perforated outer cover (100) by including a hanging structure pillar (130).

According to one aspect of the present invention, the upper part of the hollow column (310) of the housing may be fastened to the hanging structure column (130) of the perforated outer cover. The hanging structure column (130) of the perforated outer cover is not limited to a form that can be coupled to the upper part of the hollow column (310) of the housing.

According to one aspect of the present invention, with reference to FIG. 3, a hanging structure pillar (130) may be installed in the center of the perforated outer cover (100), and with reference to FIG. 5 according to another aspect of the present invention, a plurality of pillars, specifically two or more, three or more, or four or more, may be installed on the outside of the perforated outer cover (100), but is not limited thereto as long as it is in a form that can be combined with the perforated outer cover (100) and the housing.

The number of the hanging structure pillars (130) of the above-mentioned perforated outer cover (100) may be the same as the number of hollow pillars (310) of the above-mentioned housing (300), and the positions are not limited thereto as long as they are all connected to the hanging structure pillars (130) and the hollow pillars (310).

According to one aspect of the present invention, the perforated outer cover (100) includes a plurality of perforations, and the perforations may extend radially, but the positions of the perforations are not limited.

According to one aspect of the present invention, the perforated outer cover (100) may include a straight crossbar (110) and a cylindrical crossbar (120) between the perforations.

According to one aspect of the present invention, the perforated outer cover (100) may have a perforation ratio of 10 to 60% relative to the entire outer cover.

According to another aspect of the present invention, referring to Drawing 8, the housing (300) may further include a sponge (400); and a breathable film (200) installed on one side of the housing.

The above sponge (400) may be composed of a general sponge, and the sponge (400) may be included inside the housing (300). As shown in Fig. 8, a moisture absorbent may be introduced inside the housing (300), and then the sponge (400) may be included.

The above sponge (400) may have holes formed so that it can be fixed to a hollow pillar (310) of the housing as shown in FIG. 8, and the number of holes is the same as the number of hollow pillars (310).

The above sponge (400) may be placed inside the housing (300) and then the breathable film (200) may be combined with one side of the housing (300).

Next, the breathable film (200) will be described.

The breathable film (200) may be formed of a material that is impermeable to a desiccant but permeable to air containing moisture, and may be installed on the upper portion of the housing (100) to cover the open upper portion of the housing (100).

As a method for installing a breathable film (200) on the upper part of the housing (100), there may be a method of bonding the breathable film (200) to the upper part of the housing (100) using a method such as heat fusion bonding, high-frequency bonding, or adhesive bonding.

The breathable film (200) may be formed of a material having a moisture permeability, which indicates the degree to which water vapor in the air can penetrate the breathable film (200), and a water pressure, which is the pressure at which water or liquid can penetrate the breathable film (200), having a predetermined value.

For example, the breathable film (200) may be formed of a material having a moisture permeability of 5 to 600 g/m ² /h and a water pressure of 1 to 30 cmH ₂ O/min, preferably having a moisture permeability of 10 to 500 g/m ² /h and a water pressure of 5 to 25 cmH ₂ O/min, and more preferably having a moisture permeability of 20 to 400 g/m ² /h and a water pressure of 10 to 20 cmH ₂ O/min. At this time, the moisture permeability is a value measured by KS K 0594, and the water pressure is a value measured by ISO 811-1981.

Since the breathable film (200) is formed of a material having a moisture permeability within this range, the speed at which the desiccant absorbs moisture can be controlled, thereby increasing the lifespan of the integrated desiccant dust cover (1000). In addition, since the breathable film (200) is formed of a material having a water pressure within this range, liquid such as water formed inside the integrated desiccant dust cover (1000) can be effectively prevented from penetrating the breathable film (200) and flowing into the inside of the automobile lamp.

In addition, the breathable film (200) can be formed of a material having a predetermined value of air permeability, which indicates the degree to which air penetrates the breathable film (200), and a tensile strength.

For example, the breathable film (200) may have a permeability of 500 to 700 ml/min and a tensile strength of 140 to 210 N/2.54cm, preferably, a permeability of 450 to 650 ml/min and a tensile strength of 150 to 190 N/2.54cm, and more preferably, a permeability of 400 to 600 ml/min and a tensile strength of 160 to 180 N/2.54cm. At this time, the permeability is a value measured by ISO 5636-3, and the tensile strength is a value measured by ISO 1924-2, and is a value that satisfies both MD (Machine Direction) and CD (Cross Direction).

Since the breathable film (200) is formed of a material having a permeability within this range, more air can pass through the breathable film (200), allowing the desiccant to absorb more moisture contained in the air. In addition, since the breathable film (200) is formed of a material having a tensile strength within this range, it has high durability so that it is not easily torn, and can be used for a long period of time.

The breathable film (200) is formed of an object having moisture permeability, water pressure resistance, air permeability, and tensile strength within the ranges described above, and its material is not limited thereto, but may be formed of a material such as a polymer resin, cloth, and paper, and preferably may be a polymer resin, and specific examples thereof include at least one selected from polymer resins such as high density polyethylene (HDPE), polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET), but are not necessarily limited thereto.

The above-mentioned breathable film (200) may be, in another embodiment, a laminated breathable film (200) including a polyester nonwoven fabric layer, a polyolefin porous film layer, and a polyolefin-based perforated film layer. In the case of the above-mentioned laminated breathable film, the moisture absorption rate of the manufactured moisture absorbent product can be effectively controlled, and in particular, heat bonding is possible without an additional polymer resin coating, so that the process is simplified and additional costs are reduced, which has the advantage of being possible.

In addition, by using a polyurethane adhesive between the polyester nonwoven layer and the polyolefin porous film layer, a more solid bonding can be achieved than with conventional hot melt thermal bonding or epoxy adhesives. In addition, the polyurethane adhesive also has excellent water resistance, so that it has the advantage of excellent breathability when bonded between the polyester nonwoven layer and the polyolefin porous film layer.

In addition, since the polyolefin porous film layer and the polyolefin-based perforated film layer are fixed by a polyurethane-based adhesive, the three-layer laminated film has excellent breathability and durability and moisture permeability.

According to one embodiment of the present invention, the Gurley permeability (150 ml of air volume) of the laminated breathable film (200) may be 500 to 1,500 seconds, and the moisture permeability may be 500 to 2,500 g/m ² /day. Specifically, the Gurley permeability (150 ml of air volume) of the laminated breathable film (200) may be 500 to 1,000 seconds, and the moisture permeability may be 500 to 1,500 g/m ² /day. Specifically, the Gurley permeability of the laminated breathable film (200) may be 600 to 800 seconds, and the moisture permeability may be 1,500 to 2,000 g/m ² /day.

The above polyester nonwoven layer may include a polyester-based nonwoven fabric.

The above polyester nonwoven fabric may be woven from a single polyester fiber or a blend of natural fibers or synthetic fibers and polyester fibers, but is not limited thereto. The natural fibers may be cotton, wool, silk, hemp, etc., and the synthetic fibers may be synthetic fibers such as polyamide fibers and polyester fibers, but are not limited thereto.

In addition, the polyester nonwoven fabric may be manufactured by a method such as needle punching, thermal bonding, spun bonding, melt blowing or spun lacing, but is not limited thereto.

In addition, the polyester nonwoven fabric may have a basis weight of 10 to 60 g/m ² , specifically, 15 to 50 g/m ² , specifically, 20 to 40 g/m ² , but is not limited thereto.

The material of the above polyolefin porous film layer may be at least one selected from polyethylene, polypropylene, and polybutylene, and the polyethylene may be at least one selected from low-density polyethylene, high-density polyethylene, and linear low-density polyethylene, but is not limited thereto. In addition, the polyolefin porous film may be manufactured by including an inorganic filler in the polyolefin resin. The polyolefin porous film may be manufactured by adding an inorganic filler to a polyolefin resin, manufacturing an extruded sheet, and then stretching the extruded sheet, but is not limited to the above manufacturing method.

The above inorganic filler may be one or more selected from the group consisting of calcium carbonate, talc, clay, kaolin, silica, and diatomaceous earth. The average particle diameter of the above inorganic filler may be selected and used according to the purpose of the invention, and is not limited to, but preferably, 0.5 to 30 ㎛ may be used for moisture permeability, air permeability, and mechanical strength, but is not limited thereto. The content of the above inorganic filler may be 20 to 40 parts by weight per 100 parts by weight of the polyethylene resin for improving flexural strength, elasticity, and flexibility, but is not limited thereto.

In addition, according to one aspect of the present invention, the polyolefin-based perforated film may be a film having 1 to 500 perforations/ ^cm2 formed in the polyolefin-based film, specifically, a film having 8 to 30 perforations/ ^cm2 formed, specifically, a film having 8 to 10 perforations/ ^cm2 formed, but is not limited thereto.

As the number of perforations of the above polyolefin-based perforated film satisfies the above conditions, the moisture absorption rate of the desiccant including the packaging material for the desiccant can be effectively controlled.

According to one aspect of the present invention, the polyolefin-based perforated film may have an average perforation diameter of 0.01 to 2.0 mm, specifically 0.05 to 1.5 mm, specifically 0.1 to 1.0 mm, specifically 0.3 to 0.5 mm, but is not limited thereto.

According to one embodiment of the present invention, the polyolefin-based perforated film may have a perforation rate of 0.1 to 50%, specifically, 0.3 to 40%, specifically, 0.4 to 30%, specifically, 0.4 to 20%, specifically, 0.5 to 10%, specifically, 0.5 to 5%, but is not limited thereto. In this case, the perforation rate means a percentage of the sum of the entire perforation areas per unit area. The perforation rate range is adjusted within the range of the average diameter of the perforations, and the moisture absorption rate can be controlled more effectively depending on the combination thereof.

According to one aspect of the present invention, the polyurethane adhesive may be a polyurethane adhesive derived from a polyester polyol and a polyether polyol.

The desiccant can be injected into the internal space of the housing (300), and can be formed in various shapes such as powder, granule, pellet, tablet, and disk, but it is preferable to form it in powder form. This is because when the desiccant is formed in powder form, the moisture absorption area becomes relatively wider than that of a conventional desiccant contained and fixed inside a pouch.

The above-mentioned desiccant may be included in an amount of 80% or less by volume of the internal space of the housing. Specifically, it may be included in an amount of 20 to 75% by volume, and specifically, it may be included in an amount of 30 to 70% by volume.

In this way, since the desiccant does not completely fill the internal space of the housing but fills it to a certain proportion, a free space is formed in the internal space in which the desiccant can flow. In addition, the desiccant can be mixed evenly while flowing in the internal space of the housing (300) thanks to this free space, so that the moisture absorption capacity of the desiccant can be improved.

The above-mentioned desiccant is not limited to any commonly used desiccant, and specifically may be a solid-type desiccant or a gel-type desiccant, or a mixture thereof, but is not limited thereto.

The above solidified moisture absorbent is described.

The above-mentioned solidified moisture absorbent may include a curable inorganic material including at least one or two or more moisture absorbent materials selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate, and at least one or more selected from the group consisting of magnesium oxide and calcium oxide.

And, the weight ratio of the hygroscopic material: the hardenable inorganic material in the solidified moisture absorbent may be 1:0.1 to 2, preferably 1:0.2 to 1.5, and more preferably 1:0.4 to 1.5.

When a solidified desiccant is composed in this manner, the moisture absorption rate of the desiccant can be high and the moisture release rate can be low.

The solid-state desiccant comprises a desiccant material including at least one selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate in order to have moisture absorption capability. Considering the excellent moisture absorption capability and low moisture release capability, it is preferable to use magnesium chloride as the desiccant material. Magnesium chloride not only has excellent moisture absorption capability, but also has excellent moisture absorption rate and moisture absorption duration and low moisture release capability when combined with other components.

The magnesium chloride may be included in an amount of 10 to 50 wt%, preferably 20 to 45 wt%, and more preferably 25 to 40 wt%, based on the total weight of the desiccant. When the magnesium chloride is included in the desiccant in this proportion, the moisture absorption rate of the desiccant is optimized, the moisture absorption sustainability is prevented from being reduced due to excessive moisture absorption, and the release of moisture is effectively suppressed.

The above-mentioned solidified desiccant comprises a hardenable inorganic material including at least one selected from the group consisting of magnesium oxide and calcium oxide to prevent the desiccant from liquefying when absorbing moisture and to harden.

The curable inorganic material can have the effect of optimizing the moisture absorption rate of the desiccant by including two types of magnesium oxide having different specific gravities, enabling the desiccant to have a continuous moisture absorption ability for a long period of time, and preventing the moisture absorbed by the desiccant from being released when the temperature around the desiccant rapidly increases.

Meanwhile, the above-mentioned solidified moisture absorbent may contain a polymer wax in addition to a moisture absorbent substance and a hardenable inorganic substance.

The above-mentioned solid-state desiccant not only has improved moisture absorption capacity by including polymer wax, but also can minimize moisture release in a high temperature and low humidity environment and have continuous moisture absorption capacity.

Additionally, the solidified moisture absorbent may further contain an alkali metal phosphate.

The alkali metal phosphate included in the above-mentioned solidified desiccant may be an alkali metal ion selected from lithium, sodium, potassium, and the like. By including the alkali metal phosphate, the solidified desiccant can effectively suppress expansion due to moisture absorption, and can absorb moisture for a long time even in a high-humidity environment.

According to one aspect of the present invention, the solidified moisture absorbent may include at least one or two or more moisture absorbents selected from the group consisting of magnesium chloride, calcium chloride, and sodium carbonate; a curable inorganic material including at least one or more selected from the group consisting of magnesium oxide and calcium oxide; and an alkali metal phosphate.

A gel-type absorbent according to another aspect of the present invention is described.

The above gel-type moisture absorbent may include at least one moisture absorbent selected from the group consisting of magnesium chloride and sodium carbonate; a moisture absorbent copolymer selected from polyacrylate and polyacrylate metal salts; and starch.

According to one aspect of the present invention, the gel-type desiccant can become gelated when it absorbs moisture, thereby maximally suppressing the absorption of moisture from being released to the outside of the desiccant.

In addition, since the above-mentioned hygroscopic material has been described above, it is omitted here.

The above hygroscopic copolymer is not limited to a hygroscopic copolymer resin, and specifically, may include one or more hygroscopic copolymers selected from polyacrylate, polyacrylate metal salt, ethylene maleic anhydride copolymer, cross-linked carboxymethyl cellulose, polyvinyl alcohol copolymer, and cross-linked polyethylene oxide, and specifically may be a polyacrylate and/or a polyacrylate metal salt, and specifically may be a polyacrylamide copolymer and/or a polyacrylamide metal salt. In the polyacrylamide metal salt, the metal may be at least one selected from magnesium, calcium, sodium, potassium, rubidium, and cesium, but is not limited thereto. In the case of a moisture absorbent composition in which the polyacrylamide metal salt, starch, and magnesium chloride are mixed, there is an advantage in that the composition firmly gels when absorbing moisture, thereby suppressing moisture release.

The weight average molecular weight of the above polyacrylamide metal salt may be 10,000 to 10,000,000 g/mol, specifically 100,000 to 8,000,000 g/mol, specifically 1,000,000 to 7,000,000 g/mol, specifically 3,000,000 to 6,500,000 g/mol, specifically 5,000,000 to 6,500,000 g/mol, but is not limited thereto.

The above starch may be at least one selected from tapioca starch, corn starch, potato starch, glyceryl starch, aluminum starch octenyl succinate, and calcium starch octenyl succinate, and specifically may be at least one selected from tapioca starch, corn starch, and potato starch, and specifically may be corn starch, but is not limited thereto.

According to one aspect of the present invention, the gel-type desiccant may contain 1 to 80 parts by weight of the hygroscopic copolymer and 1 to 80 parts by weight of the starch, based on 100 parts by weight of the absorbent material, and specifically, may contain 1 to 60 parts by weight of the hygroscopic copolymer and 1 to 60 parts by weight of the starch.

Since the above gel-type desiccant satisfies the above content range, it has the advantage of low release rate not only in a high temperature and high humidity environment but also in a low temperature and high humidity environment.

According to one aspect of the present invention, the gel-type desiccant may have a moisture absorption rate of 150% or more at 50°C and a relative humidity of 95%, specifically 160% or more, specifically 180% or more, specifically 200% or more, specifically 250% or more, specifically 300% or more, and specifically 250 to 320%, but is not limited thereto.

According to one embodiment of the present invention, the gel-type desiccant may have a release percentage of 60% or less under the conditions of 80°C, 30% relative humidity, and 2 hours relative to the moisture absorption amount at 50°C, 95% relative humidity, and 14 days, specifically 50% or less, and specifically 40% or less, but is not limited thereto.

Hereinafter, the operation and effect of the dust cover (1000) for automobile lamp of the present invention will be described.

The present invention further includes a perforated undercover (100) in the configuration of a housing, a desiccant, and a breathable film of a conventional dust cover for an automobile lamp, thereby suppressing deterioration of the adhesion of the breathable film due to external impact, and also physically suppressing expansion of the breathable film due to moisture expansion of the desiccant.

The above-mentioned integrated desiccant dust cover (1000) may be formed by sequentially combining a perforated undercover (100), a breathable film (200), and a housing (300) with reference to the drawing of FIG. 7, and may include a desiccant in the internal space of the housing (300).

In addition, the central portion of the above-mentioned perforated undercover (100) may be connected to the hanging structure pillar (130) and the hollow pillar (310) of the housing, and this may also be a structure that is connected with one touch. As the connection is implemented with one touch, the productivity of the dust cover for the automobile lamp of the present invention can be improved.

In addition, as described above, since the integrated moisture absorbent dust cover (1000) of the present invention includes a perforated undercover (100), the bonding strength between the breathable film (200) and the housing partition (320) due to external impact can be improved, and the breathable film (200) can also be physically suppressed from expanding outward.

Furthermore, in the case of the integrated desiccant dust cover of the present invention, the installation direction is directed toward the inside of the automobile lamp, so that the desiccant can be locally present in one direction of the breathable film (200) due to gravity.

As the desiccant present in the above-mentioned local space expands, the adhesive strength between the breathable film (200) of the above-mentioned space portion and the housing partition (320) is continuously reduced, so that a portion of the breathable film (200) may burst and the desiccant present inside the housing (300) may be discharged to the outside.

Accordingly, since the perforated undercover (100) is installed on the integrated moisture absorbent dust cover, there is an advantage in that the expansion of the breathable film (200) can be suppressed, thereby maintaining the bond between the breathable film (200) and the housing partition (320) for a long period of time. Furthermore, the integrated moisture absorbent dust cover (1000) of the present invention can have a moisture absorption rate of a certain level or higher even if it includes the perforated undercover (100). Specifically, since the perforated outer cover (100) implements an area of 10 to 60%, specifically 20 to 50%, of the entire outer cover, the moisture absorption rate of the integrated moisture absorbent dust cover (1000) may be 50% or more, specifically 60% or more, specifically 70% or more, specifically 70 to 95%, specifically 70 to 90%, specifically 70 to 85%, specifically 70 to 80%, but is not limited thereto.

The above description of the present invention is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential characteristics of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single component may be implemented in a distributed manner, and likewise, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the claims which follow rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

The present invention will be described in more detail based on the following examples and comparative examples. However, the following examples and comparative examples are only examples for describing the present invention in more detail, and the present invention is not limited by the following examples and comparative examples.

<Evaluation of Desiccant Performance>

1. Moisture absorption rate

The above moisture absorption rate was measured by exposing the specimen to a temperature of 23°C and a relative humidity of 50% for 13 days using a constant temperature and humidity chamber, and the moisture absorption rate was calculated using the following Equation 1.

[Formula 1]

[Manufacturing Example 1]

Using a mixer, 40 wt% of magnesium chloride (Aldrich, purity 94%) as a hygroscopic material, 40 wt% of magnesium oxide (KONOSHIMA CHEMICAL, STARMAG 50, particle size 30 ㎛) as a hardening inorganic material, and 20 wt% of polyethylene wax (SFC, LH1200, softening point 109±3℃) were uniformly mixed to produce 35 g of a hygroscopic material.

[Manufacturing Example 2]

A polyurethane adhesive was applied onto one side of a polyester spunbond nonwoven fabric (weight 30 g/m ² , CAS No. 25038-59-9), and a polypropylene film (CAS No. 9003-07-0) was adhered onto the applied adhesive. Thereafter, a polyurethane adhesive was applied onto the polypropylene film, and a polypropylene perforated film (CAS No. 9003-07-0, cast PP film, thickness 25 um) having an average of 20 perforations/cm ² was adhered onto the applied adhesive to manufacture a breathable film. The breathable film was manufactured by a dry lamination process.

[Manufacturing Example 3]

Using a mixer, 100 parts by weight of magnesium chloride (Aldrich, purity 94%), 40 parts by weight of polyacrylamide-sodium methacrylate (CAS No. 25085-02-03), and 60 parts by weight of starch (corn starch, subject) were uniformly mixed to produce 35 g of a moisture absorbent.

[Example 1]

35 g of the desiccant of Manufacturing Example 1 was injected into the housing of Fig. 4, and the breathable film of Manufacturing Example 2 was heat-bonded to one open side of the housing, and then the perforated outer cover of Fig. 3 was bonded to the upper part of the bonded breathable film, thereby manufacturing a dust cover for an automobile lamp. The manufactured dust cover for an automobile lamp was placed in a constant temperature and humidity chamber, and the moisture absorption rate was measured over time, as shown in Table 1 below.

[Example 2]

35 g of the desiccant of Manufacturing Example 3 was injected into the housing of Fig. 4, the breathable film of Manufacturing Example 2 was heat-bonded to one open side of the housing, and then the perforated outer cover of Fig. 3 was bonded to the upper part of the bonded breathable film, thereby manufacturing a dust cover for an automobile lamp. The manufactured dust cover for an automobile lamp was placed in a constant temperature and humidity chamber, and the moisture absorption rate was measured over time, as shown in Table 1 below.

[Comparative Example 1]

The same procedure as Example 1 was followed except that the outer cover was not attached. The dust cover for the manufactured automobile lamp was placed in a temperature and humidity chamber, and the moisture absorption rate was measured over time as shown in Table 1 below.

[Comparative Example 2]

The same procedure as in Example 2 was followed except that the outer cover was not attached. The dust cover for the manufactured automobile lamp was placed in a temperature and humidity chamber, and the moisture absorption rate was measured over time as shown in Table 1 below.

Although the present invention has been described with reference to specific matters, limited examples, and drawings, these have been provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those skilled in the art will appreciate that various modifications and variations may be made from this description.

Therefore, the idea of the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims described below as well as the same are included in the scope of the idea of the present invention.

100 : Perforated outer cover
110 : Straight crossbar
120 : Cylindrical crossbar
130 : Hanging structure pillar
200 : Breathable film
300 : Housing
310 : Hollow column
320 : Housing Bulkhead
330: Hollow column bulkhead
400 : Sponge
1000 : Integrated Desiccant Dust Cover

Claims (16)

An integrated absorbent dust cover comprising: a housing having a space formed inside and one or more open sides; a breathable film; a perforated outer cover; and a desiccant.
In the first paragraph,
A housing having a space formed inside and open on one or both sides;
The inside of the above housing is formed with a hollow pillar with an upper penetration,
A desiccant installed inside the above housing;
A breathable film bonded to one side of the bulkhead of the above housing and one side of the hollow column bulkhead; and
An integrated moisture absorbent dust cover including a perforated outer cover which is connected to the upper hollow portion of the hollow column on one side of the breathable film and protects the internal space of the housing.
In the second paragraph,
An integral desiccant dust cover further comprising a sponge inside the housing.
In the second paragraph,
An integral moisture absorbent dust cover, wherein the above-mentioned perforated outer cover includes a hanging structure pillar.
In the fourth paragraph,
An integrated moisture absorbent dust cover that is connected to the upper part of the hollow column of the above housing and the hanging structure column of the perforated outer cover.
In the second paragraph,
An integral desiccant dust cover, wherein the hollow pillar of the housing is installed in the center of the inside of the housing.
In the fourth paragraph,
The above-mentioned perforated outer cover is an integrated moisture absorbent dust cover having a hanging structure pillar installed in the center.
In the third paragraph,
An integral moisture absorbent dust cover, wherein the perforated outer cover includes a plurality of perforations, the perforations extending radially.
In Article 8,
An integral desiccant dust cover, wherein the perforated outer cover includes a straight cross member and a cylindrical cross member between the perforations.
In Article 9,
The above-mentioned perforated outer cover is an integral moisture absorbent dust cover having a perforation ratio of 10 to 60% relative to the entire outer cover.
In the first paragraph,
An integral moisture absorbent dust cover, wherein the above-mentioned perforated outer cover is circular.
In the first paragraph,
The above housing is a cylindrical, integral desiccant dust cover.
In the first paragraph,
An integrated desiccant dust cover, wherein the above-mentioned desiccant comprises a solidified desiccant, a gel-type desiccant, or a mixed desiccant thereof.
In Article 13,
The above-mentioned solidified moisture absorbent comprises at least one or two or more moisture absorbents selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate;
A hardenable inorganic material comprising at least one selected from the group consisting of magnesium oxide and calcium oxide; and
An integral moisture absorbent dust cover comprising an alkali metal phosphate.
In Article 13,
An integral absorbent dust cover, wherein the gel-type absorbent comprises at least one absorbent material selected from the group consisting of magnesium chloride and sodium carbonate; a hygroscopic copolymer selected from polyacrylates and polyacrylate metal salts; and starch.
In the first paragraph,
An integrated desiccant dust cover, wherein the moisture absorption rate of the integrated desiccant dust cover is 50% or more compared to the moisture absorption rate of a dust cover for an automobile lamp from which the perforated outer cover has been removed.