• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a moisture absorbent which is easy to be applied to long-term sealed packaging of small expensive products such as pharmaceuticals or electronic parts, and a manufacturing method thereof. In the present invention, since the moisture absorbent of the chloride-based absorbent is superior to silica gel, in order to solve the desolvability, which is a problem of the chloride-based absorbent, by mixing / manufacturing the chloride-based and the porous silica, the characteristics of the moisture-absorbent of the chloride-based absorbent are solved. have. In addition, the shape of the absorbent prepared according to the present invention exhibits a globular or granular shape of opaque white with a size of 0.2 to 8 mm, and when the moisture is absorbed, the color of the absorbent becomes transparent while maintaining the form of the absorbent. By being able to easily confirm with the naked eye, it is possible to easily determine the replacement time and the degree of hygroscopicity of the absorbent.
    公开号:KR20030077500A
    申请号:KR1020030060858
    申请日:2003-09-01
    公开日:2003-10-01
    发明作者:김도완；맹주석；이동규；이진영；박진성；박진석
    申请人:코아텍주식회사；
    IPC主号:
    专利说明:

    A moisture absorbing agents and the manufacturing method therefor}
    [3] The present invention relates to a moisture absorbent which is easy to be applied to long-term sealed packaging of small expensive products such as pharmaceuticals or electronic parts, and a manufacturing method thereof. The present invention is to solve the decomposability of the chloride-based absorbent by mixing / manufacturing the chloride-based and the porous silica in order to solve the desolvability, which is a problem of the chloride-based absorbent because the chloride-based absorbent is superior to the moisture absorption. According to the present invention, the shape of the mixed / manufactured moisture absorbent exhibits a globular or granular particle having an opaque white color of 0.2 to 8 mm, and when the moisture is absorbed, the color of the absorbent becomes transparent while maintaining the form of the absorbent. Whether there is a feature that can be easily identified with the naked eye.
    [4] Conventional absorbents are mainly composed of porous materials such as silica gel and chlorides such as calcium chloride or magnesium chloride, and silica gel is harmless to the human body, and has the advantage of regenerating the absorbent by applying heat to the absorbent even after use, but the price is high. At low humidity, there is a disadvantage in that the range of use is limited because the amount of moisture absorption is not so large. In addition, chloride-based moisture absorbents such as calcium chloride have a strong deliquescent property, so that the moisture absorption amount is very large, whereas the moisture absorbent is absorbed by excessively absorbed moisture. Was melted, there was a problem that excess moisture leaked to the outside.
    [5] The technical problem to be achieved by the present invention is to recognize the problems of the conventional hygroscopic as described above, since the hygroscopic amount of the chloride-based absorbent is superior to the silica gel, in order to solve the deliquescent properties of the chloride-based absorbent, mixing / mixing the chloride and porous silica In order to solve the deliquescent problem of the chloride-based moisture absorbent. In addition, the shape of the moisture absorbent prepared in accordance with the present invention exhibits a spherical or granular particle size of 0.2 ~ 8mm with an opaque white, and when the moisture is absorbed, the color of the moisture absorbent is transparent while maintaining the form of the moisture absorbent. It can be easily confirmed by the naked eye, there is a feature that can easily determine the replacement time and the degree of moisture absorption of the absorbent.
    [1] 1 is a flowchart showing a manufacturing step (process) of the moisture absorbent according to the present invention.
    [2] 2 is a flowchart illustrating a manufacturing process of a moisture absorbent according to an embodiment of the present invention.
    [6] The present invention relates to a moisture absorbent which is easy to be applied to long-term sealed packaging of small expensive products such as pharmaceuticals or electronic parts, and a manufacturing method thereof. Hygroscopic agents commonly known as desiccants are currently widely used for the purpose of extending the shelf life of products by preventing moisture damage by continuously removing moisture while maintaining freshness and cleanliness in the storage of pharmaceuticals or electronic parts. In addition, in general households, a moisture absorbent is used for storage of clothes or food, and a moisture absorbent is generally used in an industry that is affected by production when water is present in a production process.
    [7] Among the moisture absorbents used for the above-mentioned applications, the moisture absorbents widely used to maintain the freshness and shelf life of products by maintaining the dry state of expensive products packaged and distributed in small containers such as pharmaceuticals and dried foods are mainly porous materials such as silica gel. And chloride systems such as calcium chloride or magnesium chloride are mainly used. Silica gel is harmless to the human body and has the advantage of regenerating the absorbent by applying heat to the absorbent even after use, but the price is expensive, the use range is limited because the moisture absorption is not so large at low humidity. Silica is a porous material with a surface area of about 100 to 400 m2 per gram, and has a hydrophilic silanol group (R-OH) on its surface, so that the silanol groups adsorb and remove water molecules in the form of hydrogen bonds. do. In addition, chloride-based moisture absorbents such as calcium chloride has a very strong deliquescent property, so the absorption power is very good, but the moisture absorbent is melted by the excessively absorbed moisture, there is a problem that excess moisture leaks to the outside.
    [8] In the present invention, since the moisture absorbent of the chloride-based absorbent is superior to silica gel, in order to solve the desolvability which is a problem of the chloride-based absorbent, chloride and porous silica are mixed / manufactured to solve the problem of dehydration, which is a problem of the chloride-based absorbent. The shape of the absorbent prepared in accordance with the present invention exhibits a spherical or granular shape of opaque white with a size of 0.2 to 8 mm, and when the moisture is absorbed, the color of the absorbent becomes transparent while maintaining the form of the absorbent. There is a feature that can be easily identified.
    [9] Looking in detail with respect to the manufacturing method of the absorbent according to the invention and the absorbent prepared by the production method of the present invention,
    [10] First, a) mixing (processing) the composition of 20-70% by weight of powdered silica and 30-80% by weight of powdered calcium chloride (the smaller the size of each powder is advantageous). B) The mixed powdery phase C) adding a certain amount of water slowly to the stirring step (c), and then c) allowing the moisture absorbent raw material slurry to contain a certain amount of moisture to be suitable for molding, and then spherical, granular or cylinder-type, etc. The step of forming the desired size in the form of (step), and d) the molded moisture absorbent is dried at 80 ° C to 350 ° C (step) by mixing the calcium chloride powder and silica powder to remove the deliquescent final absorbent is Are manufactured.
    [11] In addition, in step a), instead of the silica powder, the active alumina powder is mixed with calcium chloride, and then, in the step b), the step d) is performed to prepare a chloride-based hygroscopic agent without deliquescent, and thus a dehumidifying agent having excellent dehumidification ability Get In the step a), instead of calcium chloride, lithium chloride or magnesium chloride is mixed with the silica powder or activated alumina powder to prepare a chloride-based hygroscopic agent without deliquescent by going through step d) in step b). Excellent moisture absorbent is obtained.
    [12] The moisture absorbent of the present invention obtained through such a manufacturing process is much superior to the conventional silica gel and advantageous in terms of price, and also retains its shape after absorbing moisture, and has a dehumidifying speed. . In addition, since the external color of the absorbent is transparent depending on the degree of moisture absorption, there is a feature that can easily determine whether the moisture absorbed with the naked eye.
    [13] Example
    [14] Looking at the specific manufacturing process (method) of the absorbent prepared by mixing the silica powder and calcium chloride powder according to the present invention and the characteristics of the absorbent prepared by the process (method) in detail through the embodiment (Fig. 2),
    [15] a) Add 0.5 kg of silica powder (average particle size: 2.5 µm, density: 2 gr / cm3, specific surface area 116 m3 / gr) and 1 kg of calcium chloride (more than 75% purity, domestic industrial) powder in a stirrer and stir for 30 minutes B) slowly injecting 600 cc of water while operating the stirrer to 0.5 kg of the mixed silica powder and 1 kg of the calcium chloride powder, and allowing the mixture to be sufficiently stirred in a slurry state in the stirrer; and c) the sufficiently stirred absorbent. Extruding the slurry in a piston-type molding machine to form a cylinder having a diameter of 3 mm and a length of 8 mm, and d) drying the molded absorbent article at 250 ° C. for 4 hours in an oven (difference depending on the size of the molded article). The final moisture absorbent prepared by mixing silica powder and calcium chloride powder is conventional calcium chloride, and the hygroscopic agent has almost the same dehumidifying ability as the dehumidifying agent but has no deliquescent absorbent. The. In addition, in the step a), instead of the silica powder, the activated alumina powder is mixed with calcium chloride to prepare a chloride-based hygroscopic agent without deliquefaction while passing through step d) in the step b) to obtain a dehumidifying agent having excellent dehumidification ability without deliquescent property. . Lithium chloride or magnesium chloride is mixed with the silica powder or the activated alumina powder instead of calcium chloride in step a) to prepare a chloride-based hygroscopic agent without deliquescent by going through step d) of Example 1). A moisture absorbent excellent in dehumidification ability is obtained.
    [16] (Example 2)
    [17] The dehumidification effect of the moisture absorbent of the present invention prepared in Example 1 was compared using calcium chloride and silica gel, which are widely used hygroscopic agents, to date. 5 g of the absorbent of the present invention prepared in Example 1, and the conventional silica gel product (Comparative Example 1) and calcium chloride product (Comparative Example 2) were each packaged in the same packaging with 5 g each, and then 25 ° C and a relative humidity of 85 to 90%. Placed in a constant temperature and humidity chamber, and then loaded for 2 days. After recovering the sample, the change in appearance and the moisture absorption was measured and shown in Table 1. The moisture absorption amount is expressed as the weight in grams of water absorbed per 100 grams of the absorbent.
    [18] As can be seen from Table 1, the moisture absorbent of the present invention showed more than twice the moisture absorption compared to the silica gel, and has a moisture absorption amount (slightly decreased) that is almost similar to that of calcium chloride. It does not show the deliquescent property, such as maintaining the form of the absorbent, it can be seen that the color of the absorbent becomes transparent as it absorbs moisture.
    [19] Table 1. Hygroscopicity test results of the present invention and various types of moisture absorbents
    [20] Moisture absorptionAbsorbent shape Example 1 (invention)84Maintain shape, become transparent Comparative Example 1 (silica gel)33Shape maintenance Comparative Example 2 (Calcium Chloride)100Completely dismissed
    [21] In the present invention, since the chloride-based absorbent has better dehumidification ability than silica gel, in order to solve the deliquescent problem of the chloride-based absorbent, the moisture absorption amount is eliminated while mixing / manufacturing the chloride-based and porous silica to remove the deliquescent property, which is a disadvantage of the chloride-based absorbent. It has the effect of keeping it almost the same. The moisture absorbent prepared according to the present invention exhibits a globular or granular particle size of 0.2 to 8 mm, which is opaque white when the moisture is not absorbed, and when the moisture is absorbed, the absorbent form is maintained as it is and the color of the absorbent is transparent. As it can be easily confirmed by the naked eye, it has an effect of easily determining the replacement time of the absorbent and the degree of moisture absorption. There is a working effect.
    权利要求:
    Claims (7)
    [1" claim-type="Currently amended] In the method of manufacturing a chloride-based desiccant having excellent dehumidification ability, fast dehumidification speed,
    a) putting calcium chloride powder and silica powder into a stirrer to stir well to mix well,
    b) slowly injecting the mixed silica powder and calcium chloride powder while operating a stirrer and sufficiently stirring the slurry in a stirrer;
    c) extruding the sufficiently stirred moisture absorbent slurry with a molding machine;
    d) a method of producing a chloride-based dehumidifying agent without deliquescent comprising the step of putting the molded moisture absorbent in an oven to dry.
    [2" claim-type="Currently amended] The method according to claim 1,
    20-70% by weight of the silica powder and 30-80% by weight of calcium chloride powder in step a) is prepared by producing a chloride-based dehumidifying agent without deliquescent.
    [3" claim-type="Currently amended] The method according to claim 1 or 2,
    Method for producing a chloride-based dehumidifying agent without deliquescent, characterized in that using alumina powder instead of silica powder in step a).
    [4" claim-type="Currently amended] The method according to any one of claims 1 to 3,
    Method of producing a chloride-based dehumidifying agent without deliquescent, characterized in that in step a) using lithium chloride or magnesium chloride instead of calcium chloride.
    [5" claim-type="Currently amended] The method according to any one of claims 1 to 4
    The shape and size of the moisture absorbent in the step c) is a method of producing a chloride-based dehumidifying agent without deliquescent, characterized in that the molding to the desired shape and size, such as spherical, granular or cylinder type.
    [6" claim-type="Currently amended] The method according to any one of claims 1 to 5,
    Step d) is a step of drying the moisture absorbent formed in the step c) in the oven and drying the temperature inside the oven at about 80 ℃ to 350 ℃ 1 to 6 hours, characterized in that no chloride Method for producing a hygroscopic agent.
    [7" claim-type="Currently amended] Chloride-absorbent without deliquescent prepared by the above-described step.
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    同族专利:
    公开号 | 公开日
    KR100564658B1|2006-03-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2003-09-01|Application filed by 코아텍주식회사
    2003-09-01|Priority to KR1020030060858A
    2003-10-01|Publication of KR20030077500A
    2006-03-29|Application granted
    2006-03-29|Publication of KR100564658B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020030060858A|KR100564658B1|2003-09-01|2003-09-01|A moisture absorbing agents and the manufacturing method therefor|
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