JP3156312U - Dry bag - Google Patents

Abstract

[PROBLEMS] To equalize high hygroscopic performance over the entire inner surface of a bag body and to exhibit long-term durability of hygroscopic performance, eliminating the need for encapsulating desiccant and eliminating accidental ingestion of the desiccant. Thus, the present invention provides a dry bag capable of improving safety, enabling the contents to be seen through, and easily seeing the deterioration of the moisture absorption function. A substrate layer 2 made of polyethylene terephthalate, a moisture-proof layer 3 using silica, a moisture-absorbing layer 4 made by mixing polyethylene powder having a moisture-absorbing function into a thin layer, and a sealant layer for sealing. 5 are sequentially laminated to form a laminated film 6, and the two laminated films 6 are laminated so that the sealant layers 5 and 5 face each other, and heat sealing is performed on a necessary portion around the laminated sealant layers 5 and 5. To give a bag body 8. [Selection] Figure 1

Description

  The present invention relates to a dry bag, and in particular, it is possible to equalize the hygroscopic performance over the entire inner surface of the bag body by providing the laminated film itself constituting the bag body with a hygroscopic function. In addition, the present invention relates to a moist clear bag, that is, a dry bag, which exhibits long-term sustainability of moisture absorption performance.

  Conventionally, as a bag body that encloses food such as confectionery, aluminum foil having moisture-proof performance is used, and in order to keep the encapsulated confectionery food in a dry state, a desiccant is enclosed together with the confectionery food. There is something.

  Conventionally, for example, the following hygroscopic bag-like sheet for a rice container with a lid is known. In this prior art, a sealed bag-like body is formed by an upper surface material made of a resin film having no water permeability and a lower surface material made of a breathable nonwoven fabric, and a water-absorbing material made of a water-absorbing polymer is accommodated in the bag-like body. In addition, at least one vent hole is formed in the upper surface material to form a bag-shaped water absorbent sheet, and the bag-shaped water absorbent sheet is placed on the red rice (rice cooked rice) in the container body and below the lid portion. Is laid. In addition, it minimizes the occurrence of condensation on the inner surface of the lid of the container for storing cooked rice such as red rice, and even if condensation occurs, it is collected from the vent hole into the bag-like body and adsorbed on the water-absorbing material. The dew condensation is prevented from falling on the cooked rice such as red rice, and the taste of the cooked red rice is prevented from deteriorating (for example, refer to Patent Document 1).

JP 2001-37430 A

  Conventional bags made of aluminum foil cannot be seen because the aluminum foil is opaque, and the state of the confectionery may be inconvenient. In addition, the desiccant enclosed with the confectionery etc. is accidentally swallowed. There was a problem of fear.

  Moreover, in the prior art described in Patent Document 1, the upper surface material and the lower surface material itself forming the bag-like body are not provided with a water absorption function, and a water-absorbing material made of a water-absorbing polymer is provided in the bag-like body. It is made into a bag-like water absorption sheet by accommodating. Moreover, this bag-shaped water absorption sheet is not provided over the whole inner surface of the container main body which accommodates the content, but is laid only on the red rice etc. which are the contents under the cover part. Further, the bag-shaped water absorbing sheet is not one that is discolored in a predetermined amount of water absorbing state so that deterioration of the water absorbing function can be easily visually confirmed.

  Therefore, by giving the laminated film itself a moisture absorption function, it is possible to equalize the high moisture absorption performance over the entire inner surface of the bag body, and to demonstrate the long-term durability of the moisture absorption performance, so that it is not necessary to enclose a desiccant. Safety is improved by eliminating accidental ingestion of the desiccant, and use of silica in the moisture-proof layer allows the contents to be seen through.The moisture-absorbing layer changes its color in a predetermined amount of moisture-absorbing state, thereby providing a moisture-absorbing function. A technical problem to be solved arises in order to make it easy to visually recognize the deterioration, and the present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the device according to claim 1 is a substrate layer made of polyethylene terephthalate, a moisture-proof layer using silica, and polyethylene having a moisture absorption function. A laminated layer is formed by sequentially laminating a thin moisture-absorbing layer mixed with powder and a sealant layer for sealing, and the two layers of the laminated film are overlapped and overlapped so that the respective sealant layers face each other. Provided is a dry bag having a bag body by heat-sealing a required portion around the combined sealant layer.

  According to this configuration, the outermost layer of the bag is a polyethylene terephthalate base material layer having excellent mechanical strength, so that the bag has high strength. In the laminated film constituting the bag body, a moisture absorbing layer mixed with zeolite powder is laminated so that the laminated film itself has a moisture absorbing function and has a high moisture absorbing performance over the entire inner surface of the bag body. Obtained evenly. In addition, the long-term durability of the moisture absorption performance is exhibited. The moisture-proof layer is made of transparent silica (silicon dioxide) rather than an opaque aluminum foil, so that the contents can be seen through. Furthermore, the hygroscopic layer mixed with zeolite powder initially exhibits a milky white color, but after absorbing a predetermined amount of moisture, the milky white color disappears and becomes translucent. Thereby, it becomes possible to visually recognize the deterioration of the moisture absorption function.

  The device according to claim 1 is capable of evenly exhibiting high moisture absorption performance over the entire inner surface of the bag body because the laminated film itself has a moisture absorption function, and with this, long-term sustainability of the moisture absorption performance. It can be demonstrated. Therefore, since it becomes unnecessary to enclose a desiccant separately, there is no accidental ingestion of the desiccant, and safety can be improved. Use of silica (silicon dioxide) for the moisture-proof layer provides the convenience that the contents can be seen through. Since the moisture absorption layer changes color in a predetermined amount of moisture absorption, the deterioration of the moisture absorption function can be easily recognized, and when moisture content is enclosed, the moisture absorption state from the contents, in other words, the dry state of the contents There is an advantage that it can be visually recognized easily.

The figure shows a drying bag according to an embodiment of the present invention.
The side view which abbreviate | omits and dries partially a dry bag and exaggerates a seal part. The expanded sectional view of the part which follows the AA line in FIG. The characteristic view which shows the time-dependent change of the relative humidity in a dry bag compared with the case where the silica gel as a prior art is used. The characteristic view which shows a time-dependent change of the moisture absorption performance by the difference in humidity environment.

  The present invention allows the laminated film itself to have a moisture absorption function, which makes it possible to equalize the high moisture absorption performance over the entire inner surface of the bag and to demonstrate the long-term persistence of the moisture absorption performance. Improves safety by eliminating the accidental ingestion of the desiccant and eliminates accidental ingestion of the desiccant, making it possible to see through the contents by using silica for the moisture-proof layer. In order to achieve the purpose of easily seeing the deterioration of the function, the base layer made of polyethylene terephthalate, the moisture-proof layer using silica, and the zeolite powder with moisture-absorbing function in polyethylene were mixed and thinned. A hygroscopic layer and a sealant layer for sealing are sequentially laminated to form a laminated film, and two of the laminated films are overlaid so that the respective sealant layers face each other, and the sealant layer circumference is overlaid. It was achieved by a bag body of subjecting the heat-sealed to the required site.

  A preferred embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the drying bag according to the present embodiment will be described with reference to FIGS. 1 and 2. The dry bag 1 includes a base material layer 2 made of polyethylene terephthalate (PET) having excellent mechanical strength, a moisture-proof layer 3 made of silica (silicon dioxide) deposited on the base material layer 2 by vapor deposition, and polyethylene (PE ) As a base material, a hygroscopic layer 4 made by mixing zeolite (fluorite) powder having a hygroscopic function (drying function) with a thin layer and a sealant layer 5 for sealing are sequentially laminated, The laminated film 6 is integrated by heating and pressurizing. The thickness of the moisture absorption layer 4 including the sealant layer 5 is about 50 to 90 μm as shown in FIG.

  Then, as shown in FIG. 1, the two laminated films 6 and 6 are overlapped so that the sealant layers 5 and 5 are opposed to each other, and both side portions and bottom portions of the two laminated films 6 and 6 are overlapped. The sealant layers 5 and 5 in this portion are heat-sealed to form a seal portion 7 to form a bag body 8. The mouth portion 8a of the bag body 8 is left open, and after the contents of confectionery or the like are put in, the sealant layers 5 and 5 are heat sealed in the same manner as described above to form the dry bag 1 in which the contents are enclosed. The

  Next, the effect | action of the drying bag comprised as mentioned above is demonstrated using FIG.3 and FIG.4. Since the base layer 2 of polyethylene terephthalate (PET) having excellent mechanical strength is used for the outermost layer of the bag body 8, the bag body 8 having high strength is obtained. In the laminated film 6 constituting the bag body 8, a moisture absorbing layer 4 mixed with zeolite (fluorite) powder having a moisture absorbing function is laminated. Therefore, a hygroscopic function is imparted to the laminated film 6 itself, and high hygroscopic performance is evenly obtained over the entire inner surface of the bag body 8, and long-term sustainability of the hygroscopic performance is exhibited.

  FIG. 3 shows the long-term persistence of the moisture absorption performance in the dry bag 1 as a change with time of the relative humidity in the dry bag 1. For comparison, FIG. 3 also shows the change over time of the relative humidity when silica gel (desiccant) is enclosed in the bag together with the contents as a conventional technique. From the characteristics shown in FIG. 3, the drying bag 1 according to this embodiment can maintain the inside of the drying bag 1 in a low humidity environment for a long time without any inferiority to the case of using conventional silica gel (desiccant). Is shown.

FIG. 4 shows a time-dependent change characteristic of moisture absorption performance due to a difference in humidity environment in the dry bag 1. The thickness of the moisture absorbing layer 4 including the sealant layer 5 in the dry bag 1 subjected to characteristic detection is 80 μm, the surface density is about 7 g / m ² , the environment is a temperature of 25 ° C., and the relative humidity is 20% and 50%. It is a time-dependent change characteristic of moisture absorption performance (drying ability) about. From the characteristics of FIG. 4, it is shown that the drying bag 1 according to the present example can maximize the drying capacity even under a low humidity of about 20% relative humidity.

  Further, the moisture-proof layer 3 is not an opaque aluminum foil, but transparent silica (silicon dioxide) is used so that the contents can be seen through. Further, the moisture absorbing layer 4 mixed with zeolite (fluorite) powder initially exhibits a milky white color, but after absorbing a predetermined amount of moisture, the milky white color disappears and becomes translucent. Thereby, it becomes possible to visually recognize the deterioration of the moisture absorption function.

  As described above, in the dry bag 1 according to the present embodiment, the outermost layer of the bag body 8 is the base layer 2 of polyethylene terephthalate (PET) having excellent mechanical strength. Moreover, since it is excellent also in smoothness and denseness, the bag body 8 excellent in appearance can be provided.

  By providing the laminated film 6 with a hygroscopic function, high hygroscopic performance can be evenly exhibited over the entire inner surface of the bag body 8, and long-term sustainability of the hygroscopic performance can be exhibited.

  It becomes unnecessary to enclose a desiccant separately, and there is no accidental ingestion of the desiccant, thereby improving safety.

  By making the moisture-proof layer 3 silica (silicon dioxide), the convenience that the contents can be seen through can be obtained.

  Since the moisture absorption layer 4 is discolored in a predetermined amount of moisture absorption state, the deterioration of the moisture absorption function can be easily visually confirmed, and the moisture absorption state from the contents when the moisture content is enclosed, in other words, the dry state of the contents Can be easily recognized.

  Since each material of the laminated film 6 is classified as “resin”, the used bag body 8 can be used for secondary use such as fuel together with “other plastics”, and a waste supplier is separately provided. There is also a disposal advantage that it is not necessary to make a selection.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  By providing the laminated film itself with a moisture absorption function, it is possible to equalize the high moisture absorption performance over the entire inner surface and to exhibit long-term durability of the moisture absorption performance, and it is not necessary to enclose a drying agent. Since there is no accidental ingestion of the medicine, it can be widely applied to general packaging equipment in which it is essential to improve safety.

DESCRIPTION OF SYMBOLS 1 Dry bag 2 Base material layer 3 Moisture-proof layer 4 Moisture-absorbing layer 5 Sealant layer 6 Laminated film 7 Seal part 8 Bag body 8a Mouth part

Claims (1)

  A base material layer made of polyethylene terephthalate, a moisture-proof layer using silica, a moisture-absorbing layer made by mixing polyethylene powder with a moisture-absorbing function into a thin layer, and a sealant layer for sealing are sequentially laminated. A dry bag characterized in that a film is formed, and two sheets of the laminated film are overlapped so that the respective sealant layers face each other, and a heat seal is applied to a required portion around the overlapped sealant layers to form a bag body .

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