KR20220122157A - Hygroscopic foam granules for multi-layer glass and multi-layer glass equipped with the same - Google Patents

Abstract

The present invention relates to hygroscopic foam granules manufactured by mixing a polymer and a hygroscopic agent and foaming the same. Specifically, the present invention relates to hygroscopic foam granules for multi-layer glass which are excellent in moisture absorption and release resistance, and at the same time, have excellent stability. The present invention is foam granules comprising, based on 100 parts by weight of polyolefin resin, 20 to 70 parts by weight of a hygroscopic material, 5 to 40 part by weight of a coagulant, 5 to 70 parts by weight of wax, 1 to 40 parts by weight of a rust inhibitor, and 0.1 to 10 parts by weight of a foaming agent.

Description

Hygroscopic foam granules for double-layer glass and double-layer glass having the same

The present invention relates to hygroscopic foamed granules prepared by mixing a polymer and a desiccant and foaming the same. Specifically, it relates to a hygroscopic foamed granule for double-layer glass that is excellent in moisture absorption effect and release resistance while at the same time excellent in stability.

In general, double-layer glass forms a certain space between the indoor and outdoor glass and creates a vacuum state in the space, thereby reducing the loss of heat energy indoors, and also can block outdoor noise to maintain a more comfortable indoor environment. There are advantages to being

A spacer for double-glazed glass is installed between the glass installed on the window frame or chassis that divide the interior and exterior of the building, especially between the double-layered glass, to keep the double-glazed glass at a certain distance and to improve the aesthetics of the double-glazed window. It has the characteristics of improving the heat insulation and sound insulation effect.

In addition, a desiccant is enclosed in the spacer to keep the air layer in a dry state, so it has an insulating effect due to the heat resistance of the sealed air layer. It also functions to suppress the occurrence of condensation caused by

As the desiccant included in the spacer, a porous material such as zeolite and a deliquescent material such as magnesium oxide (MgO), calcium carbonate (CaCO ₃ ), and barium oxide (BaO) are generally used. In the case of the porous material desiccant, the moisture absorption rate is low and the specific gravity is heavy, which may interfere with the durability of the spacer. In addition, when the above deliquescent material is used, the moisture absorption rate is good, but the specific gravity is relatively large. In particular, when the humidity is very high, such as during the rainy season, it is completely dissolved due to the strong deliquescent property. Secondary damage can also occur.

Accordingly, it is suitable for use in the spacer space of the multi-layer glass, and has excellent hygroscopicity and durability, and in particular, also excellent release resistance, so there is a need to study a desiccant that can effectively prevent the insulation effect and dew condensation of the multi-layer glass.

Korean Patent Registration No. 10-2089956 (2020.03.11.)

An object of the present invention for solving the above problems is to have excellent hygroscopicity and low specific gravity compared to conventional desiccant such as zeolite, so that the burden of the spacer structure is small, and the stability and release resistance are also excellent, so that the insulation effect when used in double-layer glass is increased and to provide a desiccant for multilayer glass that can effectively suppress condensation.

The present invention comprises, based on 100 parts by weight of the polyolefin resin, 20 to 70 parts by weight of a moisture absorbent material, 5 to 40 parts by weight of a coagulant, 5 to 70 parts by weight of a wax, 1 to 40 parts by weight of a rust preventive agent, and 0.1 to 10 parts by weight of a foaming agent. Foamed granules are provided.

According to an aspect of the present invention, the hygroscopic material may include any one or more selected from the group consisting of magnesium chloride, calcium chloride, sodium carbonate, sodium phosphate, sodium hydrogen carbonate, sodium citrate, sodium oxalate and sodium sulfate.

According to an aspect of the present invention, the foamed granules may further include 5 to 40 parts by weight of any one or more metal oxides selected from the group consisting of magnesium oxide and calcium oxide.

According to an aspect of the present invention, the rust preventive agent may include any one or more rust preventive agents selected from alkali metal-based benzoate and triazole-based compounds.

According to an aspect of the present invention, the wax may include one or two or more selected from polyethylene wax, polypropylene wax, polyamide wax, canova wax, polytetrafluoroethylene wax, and polyolefin wax.

According to an aspect of the present invention, the coagulant is cross-linked polyacrylic salt, non-crosslinked polyacrylic salt, cellulose, super absorbent cellulose resin, guar gum, xanthan gum, gum arabic, garty gum, logust bean gum, damma gum, gellan gum , rosin gum, karaya gum, kopal gum, tara gum, tamarind gum, and may be one comprising at least one selected from the group consisting of gum tragacanth.

According to an aspect of the present invention, the foaming agent may include an azo-based chemical foaming agent.

According to an aspect of the present invention, the foamed granules may further include metal stearate.

According to an aspect of the present invention, it is possible to provide a composite glass comprising a double glass layer in which the foamed granules are filled in part or all of the edge between the glass and the glass.

According to an aspect of the present invention, the composite glass may be one in which an inert gas is filled between the glass and the glass.

The hygroscopic foamed granules according to the present invention have a low specific gravity and excellent durability by foaming a polymer, and in particular, have excellent hygroscopicity and are suitable for use as a desiccant for double-layer glass.

In addition, the hygroscopic foamed granules have low release resistance and can absorb moisture for a long period of time, so that it is possible to effectively suppress the condensation phenomenon for a long period of time and at the same time further improve the thermal insulation effect of the double-layer glass, and it is also excellent in anti-rust effect so that excessive heat in summer Even in humidity, it is possible to maintain the durability of the laminated glass by suppressing the occurrence of rust of the material of the laminated glass.

1 is an image showing an example of a foamed granule.
2 is an image of an example of a double-layer glass containing a desiccant.

Hereinafter, the present invention will be described in more detail through embodiments or examples including the accompanying drawings. However, the following specific examples or examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

Also, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

A porous material such as zeolite is used as the conventional desiccant used in the multi-layer glass, but the porous material has a very low degree of moisture absorption, has a very low stability and a high specific gravity, so there are problems such as giving a load to the multi-layer glass structure.

In addition, in the case of a powdery or granular desiccant such as magnesium oxide, it has excellent moisture absorption but poor stability. .

Accordingly, the present invention solves the above problems by providing a foamed granule in the form of a granule prepared by preparing a composite moisture-absorbing material including a moisture-absorbing material, a coagulant, a rust preventive agent, and a wax, mixing it with a polyolefin resin and foaming.

In the case of the foamed granules, the foamed granules have excellent hygroscopicity, low specific gravity, and excellent release resistance, thereby effectively lowering the humidity inside the double-layer glass to further increase the insulation effect, especially in winter, and at the same time have the effect of preventing condensation. .

More specifically, according to an aspect of the present invention, the foamed granules are based on 100 parts by weight of the polyolefin resin, 20 to 70 parts by weight of a hygroscopic material, 5 to 40 parts by weight of a coagulant, 5 to 70 parts by weight of a wax, 1 to 40 parts by weight of a rust preventive agent It may be foamed granules in the form of granules prepared from a composition comprising 0.1 to 10 parts by weight of a foaming agent and a weight part.

Preferably, the foamed granules are based on 100 parts by weight of the polyolefin resin, 30 to 60 parts by weight of a hygroscopic material, 8 to 20 parts by weight of a coagulant, 8 to 30 parts by weight of a wax, 5 to 30 parts by weight of a rust preventive agent, and 1 to 7 parts by weight of a foaming agent. It may be a foamed granule in the form of a granule prepared from the composition comprising it.

More preferably, the foamed granules are based on 100 parts by weight of the polyolefin resin, 40 to 50 parts by weight of a hygroscopic material, 8 to 15 parts by weight of a coagulant, 15 to 25 parts by weight of a wax, 15 to 25 parts by weight of a rust preventive agent, and 1 to 5 parts by weight of a foaming agent. It may be foamed granules in the form of granules prepared from a composition comprising parts, but is not limited to the above content ranges.

In the case of foamed granules satisfying the above content, it is possible to exhibit excellent processability and at the same time excellent effects in moisture absorption, release resistance and rust prevention effect.

In addition, in the case of the foamed granules, it is suitable for mass production due to excellent workability and durability, and has a low specific gravity, so that it can be input in a large amount without burdening the load even if it is put inside the spacer of the double-layer glass.

The polyolefin-based resin is not limited as long as it is a commonly used polyolefin-based resin, but may preferably be a polyethylene resin, a linear low-density polyethylene resin, a low-density polyethylene resin, and a polypropylene resin, and more preferably a low-density polyethylene resin.

The polyolefin-based resin may have a melt index of 10 to 40 g/10min, preferably 10 to 30 g/10min, more preferably 20 to It may be 30 g/10min, but is not limited thereto.

By using the polyolefin-based resin in the melt index range, processability and durability are excellent, and in particular, it can be more uniformly mixed with the above materials such as the moisture absorbent material, coagulant, wax, rust preventive agent and foaming agent.

According to an aspect of the present invention, the hygroscopic material is for imparting hygroscopicity, and as long as its type can implement hygroscopic performance, it can be used without being greatly limited. Specific examples include any one or more selected from magnesium chloride, calcium chloride, sodium carbonate, sodium phosphate, sodium hydrogen carbonate, sodium citrate, sodium oxalate and sodium sulfate, but is not necessarily limited thereto. Preferably, any one or more selected from magnesium chloride, calcium chloride and sodium carbonate may be mentioned, and most preferably magnesium chloride.

The magnesium chloride may have a purity of 90 to 95%, and as the magnesium chloride is included in the foamed granules, it can be confirmed that the foamed granules have an excellent moisture absorption effect.

According to an aspect of the present invention, the wax may be one or two or more selected from polyethylene wax, polypropylene wax, polyamide wax, canova wax, polytetrafluoroethylene wax, and polyolefin wax, preferably polyethylene wax and polypropylene wax, but is not limited thereto.

As the wax is included in the foamed granules, it functions to suppress the release of moisture absorbed and can also serve to control the moisture absorption of the product, and excellent processability during extrusion processing to produce the foamed granules. It works.

According to an aspect of the present invention, the coagulant is cross-linked polyacrylic salt, non-crosslinked polyacrylic salt, cellulose, super absorbent cellulose resin, guar gum, xanthan gum, gum arabic, garty gum, logust bean gum, damma gum, gellan gum , rosin gum, karaya gum, copal gum, tara gum, tamarind gum and tragacanth gum may be at least one selected from the group consisting of, preferably cellulose, super absorbent cellulose resin and guar gum, but limited thereto it is not

As the foamed granules contain the coagulant, it is possible to lower the releasability of discharging the excessively absorbed moisture by the foamed granules to the outside, and there is an advantage in that moisture absorption is also increased.

According to one aspect of the present invention, the rust preventive agent may be any one or more rust preventive agents selected from alkali metal-based benzoate and triazole-based compounds.

In the case of the alkali metal-based benzoate, specifically, it may be at least one selected from sodium benzoate, lithium benzoate and potassium benzoate, and the triazole-based compound is at least one selected from benzotriazole and tolytriazole. it could be

As the foamed granules contain the rust preventive agent, it is possible to exert the effect of having excellent hygroscopicity and release resistance while at the same time suppressing the whitening or rusting phenomenon of aluminum, which is mainly used as a spacer of the double-layer glass due to the rust preventive effect.

In addition, according to an aspect of the present invention, the foamed granules may additionally include a metal oxide. By further including the metal oxide, stability may be further improved.

The metal oxide may include any one or more selected from magnesium oxide, calcium oxide, and the like, but is not necessarily limited thereto.

The foamed granules may contain 5 to 40 parts by weight of any one or more metal oxides selected from the group consisting of magnesium oxide and calcium oxide, preferably 8 to 20 parts by weight, more preferably 8 to 15 parts by weight. However, the present invention is not limited thereto.

The metal oxide may have a particle size of 30 to 500 mesh, and magnesium oxide among the metal oxide is included in the foamed granules, so that the foamed granules may have better stability and durability.

As the foamed granules include the metal oxide, it is possible to prevent deliquescence due to excessive moisture, and thus, it is possible to have the effect of improving the stability of the foamed granules.

In addition, according to an aspect of the present invention, the foamed granules may additionally include metal stearate. The metal stearate is not particularly limited in terms of achieving the object and effect of the present invention, but may preferably be at least one selected from the group consisting of calcium stearate and magnesium stearate. The release rate can be further suppressed by the expanded granules further comprising a metal stearate.

The metal stearate may be used in an amount of 1 to 20 parts by weight, preferably 3 to 15 parts by weight, and more preferably 5 to 15 parts by weight, based on 100 parts by weight of the polyolefin-based resin, but is not limited thereto.

In addition, according to an aspect of the present invention, the foamed granules include foamed ones due to a foaming agent. The foamed granules are foams in a foamed form, and can have a large specific surface area by changing the shape of porous pores or surfaces, so that the moisture absorption effect is very good.

According to an aspect of the present invention, the desiccant composition may be prepared by extrusion foaming including 0.1 to 10 parts by weight of a foaming agent, preferably 1 to 7 parts by weight, more preferably 1 to 5 parts by weight. However, the present invention is not limited thereto.

By using the foaming agent in the above range, there is an advantage in that the durability of the foamed granules during extrusion is excellent and the specific surface area is also excellent, so that it is smooth to process and excellent in hygroscopicity can be exhibited.

In addition, as the content of the foaming agent is satisfied, the size and uniformity of the foamed cells are not broken when the wire of the foamed granules is discharged from the nozzle during extrusion, and the discharged foamed granules are visually checked. This has excellent advantages.

In addition, the foaming method may include a chemical foaming agent and may also be foamed physically, but is not limited thereto.

The chemical blowing agent may include an azo-based chemical blowing agent, and the azo-based blowing agent is azodicarbonamide (ADCA), azobisisobutyronitrile (AIBN), azobiscyclohexylnitrile, azodiaminobenzene, barium azo It may be any one selected from the group consisting of dicarboxylate and combinations thereof.

In addition, according to another aspect of the present invention, a physical foaming method in which the moisture absorbent composition is extruded and manufactured into granules, and then the physical foaming agent is foamed under high temperature and pressure, may also be used.

The physical foaming is a foaming method in which a liquefied gas or a supercritical fluid is dissolved in a resin under high pressure, and the solubility is lowered due to pressure drop or heating to generate bubbles. Representative examples of the liquefied gas include freon and hydrocarbons, and preferably C ₁ -C ₅ It may be a hydrocarbon, and more preferably, butane and pentane, but is not limited thereto.

In the production of the hygroscopic foam of the present invention, supercritical nitrogen or supercritical carbon dioxide, which are supercritical fluids, may be used as the blowing agent.

By adding the supercritical fluid to the mixture of the thermoplastic resin and the particulate hygroscopic material, a foamed structure is formed with the particulate hygroscopic material as the nucleus, and thus, voids can be provided around the particulate hygroscopic material. Also, at the same time, foamed cells may be formed in the foamed resin layer. Since the supercritical fluid acts as a processing aid, it becomes possible to form a molded article highly filled with a particulate hygroscopic material. Considering the reactivity with the particulate hygroscopic material and the size of the foam cell diameter, supercritical nitrogen is suitable. In addition, the injection amount of these supercritical fluids is calculated and determined from the calculated|required expansion ratio and the discharge amount of molten resin.

The foamed granules have a moisture absorption of 70% or more, preferably 100% or more, so that when used as a desiccant, it is possible to suppress the occurrence of dew condensation of the double-layer glass and satisfy an excellent thermal insulation effect.

In addition, the foamed granules satisfy the release resistance of 60% or less and the rust prevention rate of 0.1% or less, preferably 0.07% or less, and can effectively suppress rust generated on the parts of the spacer and the double-layer glass, and also have excellent stability for a long period of time. It has the advantage of maintaining the moisture absorption effect for a while.

Now, a method for manufacturing the foamed granules of the present invention will be described.

According to an aspect of the present invention, a) based on 100 parts by weight of the polyolefin resin, 20 to 70 parts by weight of a hygroscopic material, 5 to 40 parts by weight of a metal oxide, 5 to 40 parts by weight of a coagulant, 5 to 70 parts by weight of a wax, 5 to 70 parts by weight of a rust preventive agent to 40 parts by weight and 0.1 to 10 parts by weight of a foaming agent to prepare a mixed composition; b) preparing the foamed granules by injecting the mixed composition into an extruder and extruding; and c) cutting the foamed granules discharged from the extruder to prepare the foamed granules in the form of particles.

The polyolefin resin is a powder-type resin and is smoothly mixed with the moisture absorbing material, metal oxide, coagulant, wax and rust inhibitor with a mixer.

The uniformly mixed composition is put into an extruder and melted at the melting temperature of the polyolefin, and the foaming agent is foamed at the melting temperature to prepare foamed granules. The melting temperature is not limited as long as the polyolefin is melted, but may preferably be 150 to 180°C.

The foamed granules are in the form of wires coming out of the extrusion process and cut through a die section to produce foamed granules in the form of particles of a desired size. The average particle diameter thereof is not particularly limited, but may have an average particle diameter of 0.01 to 100 mm, preferably 0.1 to 50 mm, and more preferably 1 to 5 mm.

According to an aspect of the present invention, the foamed granules may be included in a composite glass including a double glass layer filled in part or all of the edge between the glass and the glass.

As a specific example, it may be a case in which the moisture absorbent (foamed granules) 300 is included in the spacer 200 between the multilayer glass 100 as shown in FIG. 2 , but is not limited thereto.

In the case of the composite glass including the double glass layer, dew condensation may occur due to the humidity of the space between the glass and the glass, and there is a problem in that the thermal insulation effect is also reduced.

Accordingly, it was attempted to solve the above problem by including a desiccant in the composite glass. In particular, the desiccant is mainly used to be filled inside the spacer included in the composite glass, and since most of the material of the spacer is aluminum, it may be rapidly rusted due to moisture or salt re-released from the desiccant.

Accordingly, by including the foamed granules prepared in the present invention in the composite glass including a double glass layer, the humidity inside the composite glass is effectively controlled, thereby suppressing the dew condensation inside the composite glass, and reducing the humidity. It has the effect of increasing the thermal insulation effect.

In the case of the foamed granules, it has an incomparably high hygroscopicity compared to conventionally used desiccant agents such as zeolite and silica gel, and excellent release resistance, so that dew condensation inside the composite glass can be suppressed.

In addition, the foamed granules can be used to be filled inside the spacer of the composite glass, and the specific gravity of the foamed granules is low, so that it is not bent or deformed even when filled in the spacer.

According to an aspect of the present invention, the composite glass may be filled with an inert gas between the glass and the glass, and the inert gas may be any one or more gases selected from argon, nitrogen, and helium. As the inert gas is further included in the interior of the composite glass, the moisture absorption effect of the foamed granules can be maintained for a long time.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following Examples and Comparative Examples are only examples for explaining the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.

[melting index]

According to ASTM D1238 measurement method, it was measured at 125°C and 2.16 kg, and the melt index unit is g/10min.

[Stability Test]

After exposure for 20 days in a thermo-hygrostat under conditions of 50° C. and 95% relative humidity, the degree of moisture generation in the PE film of the contents of the specimen was visually evaluated. At this time, for the above items, if the moisture generation is at the level of water droplets on the PE film, it is denoted by ◎, if moisture is generated, it is denoted by ○, and if excessive moisture is generated, it is denoted by ×.

[Moisture Absorption Test]

After exposing the specimen for 20 days at 50±2 ℃ and 95±5% relative humidity using a thermo-hygrostat, the moisture absorption is measured, and the moisture absorption is calculated by the following formula.

[Emission rate test]

After 48 hours of moisture absorption at 50° C. and 95% relative humidity of the desiccant for double-layer glass, the release rate was measured by releasing it in an oven at 80° C. for 2 hours, and the release rate is calculated by the following formula.

[Formability Test]

The foam cells of the foaming agent were observed with the naked eye, and if the size and uniformity of the foamed cells were excellent, ◎, good ○, and X if the cells were not formed or were not molded.

[Hearing Rate Test]

A 90mm×50mm aluminum test piece (product of Q-LAB A-23.5) is polished with sandpaper, etc., and then washed with ethanol and acetone. The aluminum test piece was sealed with the foamed granules prepared in Examples and Comparative Examples by sealing the PE breathable film of Han Chemical Co., Ltd. (Korea) with the inner skin, and PET of Toray Saehan Co., Ltd. (Korea) as the outer skin.

The specimens were exposed for 30 cycles at 25-55° C. and 93-95% relative humidity. At this time, as shown in FIG. 3, 1 cycle is exposed at 25° C. and 98% relative humidity conditions for the initial 2 hours, and after raising the temperature to 55° C. for 1 hour and 30 minutes, 4 at 55° C. and 95% relative humidity conditions. After exposure for 30 minutes, the temperature was lowered to 25° C. for 30 minutes, and exposure was performed at 25° C. and 95% relative humidity for 1 hour and 30 minutes.

[Example 1]

As described in Table 1, with respect to 100 parts by weight of low-density polyethylene having a melt index of 22 g/10 min measured at 125 ° C., 2.16 kg conditions according to ASTM D1238, 43.48 parts by weight of magnesium chloride, magnesium oxide (KONOSHIMA CHEMICAL, STARMAG) 50) 10.87 parts by weight, sodium carboxymethyl cellulose (Assay: 6.5-9.5% sodium, Mw 500 g/mol) 10.87 parts by weight, sodium benzoate 21.74 parts by weight, polyethylene wax 21.74 parts by weight, magnesium stearate 6.52 parts by weight and azo 2.17 parts by weight of dicarbonamide was mixed with a mixer to prepare a mixed composition,

The mixed composition was put into an extruder and extruded to prepare foamed granules.

Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Example 2]

Example 1 was carried out in the same manner except that the content of the mixture composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate and stability of the prepared foamed granules were measured and described in Table 2.

[Example 3]

The same procedure was performed except that in Example 1, magnesium stearate was not used, and the content of the mixed composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Example 4]

Example 1 was carried out in the same manner except that magnesium oxide was not used, and the content of the mixed composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 1]

Example 1 was carried out in the same manner except that sodium carboxymethyl cellulose was not used, and the content of the mixed composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 2]

Example 1 was carried out in the same manner except that sodium benzoate was not used, and the content of the mixed composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 3]

Example 1 was carried out in the same manner except that azodicarbonamide was not used, and the content of the mixed composition was used as described in Table 2. Moisture absorption rate, rust release rate, release rate and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 4]

In Example 1, azodicarbonamide and sodium benzoate were not used, and the content of the mixed composition was used as described in Table 2, except that it was carried out in the same manner. Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 5]

In Example 1, magnesium stearate, azodicarbonamide, and sodium benzoate were not used, and the content of the mixed composition was used as described in Table 2, except that it was carried out in the same manner. Moisture absorption rate, rust release rate, release rate, moldability and stability of the prepared foamed granules were measured and described in Table 2.

[Comparative Example 6]

Instead of the foamed granules of Example 1, zeolite (3 Å, GEOMOLS_PG10, Cosmo Advanced Materials) was used, and its moisture absorption, rust release, release rate, moldability and stability were measured and described in Table 2.

low density polyethylene hygroscopic metal oxide polymer flocculant rust inhibitor blowing agent
(baking soda) wax metal stearate Example 1 100 43.48 10.87 10.87 21.74 2.17 21.74 6.52 Example 2 100 36.70 9.17 5.50 9.17 2.75 9.17 11.01 Example 3 100 24.79 8.26 4.96 16.53 2.48 8.26 - Example 4 100 43.48 - 10.87 21.74 2.75 21.74 6.52 Comparative Example 1 100 43.48 10.87 - 21.74 2.17 21.74 6.52 Comparative Example 2 100 43.48 10.87 10.87 - 2.17 21.74 6.52 Comparative Example 3 100 43.48 10.87 10.87 21.74 - 21.74 6.52 Comparative Example 4 100 29.31 10.34 6.90 - - 17.24 8.62 Comparative Example 5 100 20.83 8.33 5.56 - 4.17 - -

Moisture absorption (%) Hearing rate (%) Emission rate (%) stability formability Example 1 104 0.04 58.65 ◎ ◎ Example 2 90 0.08 55.32 ◎ ◎ Example 3 75 0.04 43.25 ○ ○ Example 4 80 0.10 60.87 ○ ○ Comparative Example 1 96 0.05 54.31 × ○ Comparative Example 2 106 53.69 58.91 × ○ Comparative Example 3 86 0.06 50.21 × ○ Comparative Example 4 75 53.69 43.59 × ○ Comparative Example 5 73 53.69 41.54 × × Comparative Example 6 20 0.19 62.31 - -

As described above, the present invention has been described with specific matters and limited examples and drawings, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention is not limited to the above embodiments. Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

100: double glass
200: spacer
300: desiccant or foam granules

Claims (10)

Based on 100 parts by weight of the polyolefin resin, 20 to 70 parts by weight of a hygroscopic material, 5 to 40 parts by weight of a coagulant, 5 to 70 parts by weight of a wax, 1 to 40 parts by weight of a rust preventive agent, and 0.1 to 10 parts by weight of a foaming agent. The method of claim 1,
The hygroscopic material is expanded granules comprising any one or more selected from the group consisting of magnesium chloride, calcium chloride, sodium carbonate, sodium phosphate, sodium hydrogen carbonate, sodium citrate, sodium oxalate and sodium sulfate. The method of claim 1,
The foamed granules further include 5 to 40 parts by weight of any one or more metal oxides selected from the group consisting of magnesium oxide and calcium oxide. The method of claim 1,
The rust preventive agent is foamed granules comprising at least one rust preventive agent selected from alkali metal-based benzoate and triazole-based compounds. The method of claim 1,
The wax is one or two or more selected from polyethylene wax, polypropylene wax, polyamide wax, canova wax, polytetrafluoroethylene wax, and polyolefin wax. The method of claim 1,
The coagulant is crosslinked polyacrylic salt, non-crosslinked polyacrylic salt, cellulose, superabsorbent cellulose resin, guar gum, xanthan gum, gum arabic, garty gum, logust bean gum, damma gum, gellan gum, rosin gum, karaya gum, nose Eight gum, tara gum, tamarind gum and at least one selected from the group consisting of tragacanth gum, foamed granules. The method of claim 1,
The foaming agent is an azo-based chemical foaming agent. The method of claim 1,
The foamed granules are foamed granules that further include a metal stearate. 9. A composite glass comprising a double glass layer in which the foamed granules of any one of claims 1 to 8 are filled in part or all of the edge between the glass and the glass. 10. The method of claim 9,
The composite glass is a composite glass in which an inert gas is filled between the glass and the glass.

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