Sealing device for moisture permeability measurement

Abstract

To provide a sealing device for moisture permeability measurement that seals a container mouth part, and can measure the amount of water vapor permeating a container (water vapor permeation ratio), that is the moisture permeation amount / moisture permeability of the container, easily at a low price.SOLUTION: A sealing device 1 for moisture permeability measurement is a device that seals a mouth part of a container for measuring the moisture permeability, and comprises a sealing part 10 that seals the mouth part of the container, and a fixing part 20 that fixes the sealing part 10 to the container. The fixing part 20 includes a band member 21 that goes around the container, a first tightening and loosening member 22 that tightens or loosens the band member 21, at least three connection members 24 that connect the sealing part 10 and the band member 21 to each other, and at least three second tightening and loosening members 25 that tighten or loosen the at least three connection members 24.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sealing device for measuring moisture permeability. [Background technology]

[0002] Barrier films with low water vapor permeability are used as packaging materials for foods, medicines, electronic components, etc. For example, Non-Patent Documents 1 and 2 and Patent Document 1 disclose techniques for measuring the moisture permeability of such film-like (sheet-like) samples.

[0003] In the moisture permeability test method (cup method) for moisture-proof packaging materials specified in JIS Z 0208:1976 described in Non-Patent Document 1 and ISO 2528:1995 described in Non-Patent Document 2, A cup having a bottom wall and a peripheral side wall, and a ring disposed on the peripheral side wall of the cup, - Moisture absorbent placed inside the cup, The sample piece is sandwiched between the circumferential wall of the cup and the ring. A groove is disposed on the periphery between the peripheral side wall of the cup and the ring, and sealing wax is poured into the groove to seal the periphery of the sample piece; The amount of moisture transmitted through the sample is measured by measuring the change in mass of the moisture absorbent after a specified time has passed in a specified humid environment.

[0004] In the water vapor permeability measurement method described in Patent Document 1, - Using metal corrosion methods (e.g. calcium corrosion method), A sample is placed on a water vapor permeability measurement unit that contains calcium or the like and has a foil-shaped water vapor detection unit that detects water vapor, and the sample is sealed around the periphery with a sample sealant. After a predetermined time has passed in a predetermined humid environment, the location of corrosion in the water vapor detection part is measured, for example, by image processing, and the water vapor permeability of the sample is measured.

[0005] On the other hand, there is a technique for measuring the moisture permeability of containers such as PET bottles. The moisture permeability measurement technique for film-like samples described in Non-Patent Document 1 and Patent Document 1 cannot be used to measure the moisture permeability of such container shapes, and a moisture permeability measurement technique for containers shown in Figure 17 is known. In this container permeability measurement technique, a ball-plug bottle adapter consisting of a stainless steel ball and a flow tube is attached to the opening of the container, and oxygen or water vapor that has permeated into the container is measured by flowing it to a sensor in the measurement device. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2014 / 119690 [Non-patent literature]

[0007] [Non-Patent Document 1] JIS Z 0208:1976, "Testing Methods for Determination of the Water Vapor Transmission Rate of Moisture-Proof Packaging Materials (Dish Method)", Japan Industrial Standards, March 1, 1976 [Non-patent document 2] ISO 2528:1995, “Sheet materials - Determination of water vapor transmission rate - Gravimetric (dish) method”, International Organization for Standardization, September 1, 1995. Summary of the Invention [Problem to be solved by the invention]

[0008] However, a measuring device such as that shown in Fig. 17 is expensive. Therefore, there is a demand for an inexpensive and simple method for measuring the moisture permeability of a film-like sample, such as the technique described in Non-Patent Document 1 and Patent Document 1, even in the case of a container-shaped sample.

[0009] The present invention aims to provide a sealing device for measuring moisture permeability that can seal the mouth of a container and measure the amount of water vapor that passes through the container (water vapor transmission rate), i.e., the moisture permeability / moisture permeability of the container, inexpensively and easily. [Means for solving the problem]

[0010] The sealing device for measuring moisture permeability according to the present invention is a device for sealing the mouth of a container for measuring the moisture permeability of the container, and comprises a sealing part for sealing the mouth of the container and a fixing part for fixing the sealing part to the container, wherein the fixing part includes a belt member that surrounds the container, a first fastening / loosening member that tightens or loosens the belt member, at least three connecting members that connect the sealing part and the belt member, and at least three second fastening / loosening members that tighten or loosen the at least three connecting members, respectively. [Effects of the Invention]

[0011] According to the present invention, the mouth of a container can be sealed and the amount of water vapor that has permeated the container (water vapor transmission rate), that is, the moisture transmission amount / moisture permeability of the container can be measured inexpensively and simply. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a sealing device for measuring moisture permeability according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the sealing device for moisture permeability measurement shown in FIG. [Figure 3] FIG. 2 is a top view of the sealing device for moisture permeability measurement shown in FIG. [Figure 4] 2 is a perspective view showing a sealing portion of the sealing device for moisture permeability measurement shown in FIG. 1. FIG. [Figure 5] FIG. 5 is a front view of the sealing portion shown in FIG. [Figure 6]FIG. 5 is a top view of the sealing portion shown in FIG. [Figure 7] 2 is a perspective view showing a fixing part of the sealing device for moisture permeability measurement shown in FIG. 1. FIG. [Figure 8] FIG. 8 is a front view of the fixing part shown in FIG. 7. [Figure 9] FIG. 8 is a top view of the fixing part shown in FIG. 7. [Figure 10] 8 is a front view (side view) of an auxiliary member in the fixing portion shown in FIG. 7. FIG. [Figure 11] 8 is a top view of an auxiliary member in the fixing portion shown in FIG. 7. [Figure 12] 1. FIG. 4 is a perspective view showing a modified example of the sealing portion in the sealing device for moisture permeability measurement shown in FIG. [Figure 13] FIG. 13 is a front view of a modified example of the sealing portion shown in FIG. [Figure 14] 13 is a top view of a modified example of the sealing portion shown in FIG. 12. FIG. [Figure 15] 1 is a diagram showing a moisture permeability measuring method according to an embodiment of the present invention. FIG. [Figure 16] 1 is a diagram showing a moisture permeability measuring method according to an embodiment of the present invention. FIG. [Figure 17] FIG. 1 is a diagram showing a conventional moisture permeability measuring device. DETAILED DESCRIPTION OF THE INVENTION

[0013] An example of an embodiment of the present invention will be described below with reference to the accompanying drawings. The same or equivalent parts in each drawing are designated by the same reference numerals. For convenience, hatching and reference numerals may be omitted. In such cases, reference should be made to other drawings.

[0014] (Sealing device for moisture permeability measurement) Fig. 1 is a perspective view showing a sealing device for moisture permeability measurement according to this embodiment. Fig. 2 is a front view of the sealing device for moisture permeability measurement shown in Fig. 1, and Fig. 3 is a top view of the sealing device for moisture permeability measurement shown in Fig. 1. The sealing device for moisture permeability measurement 1 shown in Figs. 1 to 3 is a device that seals the mouth A1 of a container A as shown in Fig. 16 in order to measure the moisture permeability of the container A shown in Fig. 15, for example.

[0015] Container A is a molded product in the shape of a container, mainly made of resin, and examples thereof include products with a mouth such as a bottle or a cup. Sealing device 1 for moisture permeability measurement includes sealing part 10 that seals the mouth of container A, and fixing part 20 that fixes sealing part 10 to the mouth or body of container A.

[0016] Fig. 4 is a perspective view showing the sealing portion of the sealing device for moisture permeability measurement shown in Fig. 1. Fig. 5 is a front view of the sealing portion shown in Fig. 4, and Fig. 6 is a top view of the sealing portion shown in Fig. 4. As shown in Figs. 4 to 6 and 1 to 3, the sealing portion 10 has a sealing material 11 and a flat plate member 12.

[0017] The sealing material 11 is a gasket that comes into contact with the opening of the container A and seals the opening of the container A. As the material for the sealing material 11, a known gasket material such as rubber is used.

[0018] The flat plate member 12 is a plate that faces the mouth of the container A via the sealing material 11. At least three through holes 12A are arranged on the periphery of the flat plate member 12. The material of the flat plate member 12 is not particularly limited, but examples thereof include metal, glass, plastic, and ceramic.

[0019] Fig. 7 is a perspective view showing the fixing part of the sealing device for moisture permeability measurement shown in Fig. 1. Fig. 8 is a front view of the fixing part shown in Fig. 7, and Fig. 9 is a top view of the fixing part shown in Fig. 7. Fig. 10 is a front view (side view) of an auxiliary member in the fixing part shown in Fig. 7, and Fig. 11 is a top view of the auxiliary member in the fixing part shown in Fig. 7. As shown in Figs. 7 to 9 and 1 to 3, fixing part 20 has band member 21, first tightening / loosening member 22, at least three auxiliary members 23, at least three connecting members 24, and at least three second tightening / loosening members 25.

[0020] The band member 21 is a band that wraps around the mouth or body of the container A. The material of the band member 21 is not particularly limited, but examples thereof include metal and plastic.

[0021] The first tightening / loosening member 22 tightens or loosens the belt member 21. As the first tightening / loosening member 22, a known tightening / loosening member is used.

[0022] Each of the auxiliary members 23 is a stay that is connected to the belt member 21 and supports the belt member 21. As shown in Figures 7 to 9 and 10 to 11, each of the auxiliary members 23 has a through hole 23A through which the belt member 21 is inserted and a through hole 23B through which each of the connecting members 24 is inserted. The material of the auxiliary members 23 is not particularly limited, but examples include metal, resin, etc.

[0023] As shown in FIGS. 1 to 3 , each of the connecting members 24 connects the sealing portion 10 and the belt member 21 of the fixed portion 20. Each of the second tightening / loosening members 25 tightens or loosens each of the connecting members 24. For example, each of the connecting members 24 is a bolt, and each of the second tightening / loosening members 25 is a nut. In this case, each of the connecting members 24 is inserted through each of the through holes 12A of the flat plate member 12 of the sealing portion 10 and through each of the through holes 23B of the auxiliary members 23 of the fixed portion 20. Each of the second tightening / loosening members 25 fits into each of the connecting members 24.

[0024] (Moisture permeability measurement method) Next, a moisture permeability measuring method according to this embodiment using the sealing device 1 for moisture permeability measurement described above will be described with reference to FIGS.

[0025] As shown in FIG. 15, moisture absorbent B is placed inside container A. Next, as shown in FIG. 16, the mouth of container A is sealed using sealing device 1 for moisture permeability measurement. At this time, band member 21 of fixing part 20 is tightened by first tightening / loosening member 22 of fixing part 20. This secures sealing part 10 to the mouth or body of container A. Additionally, each of connecting members 24 of fixing part 20 is tightened by each of second tightening / loosening members 25 of fixing part 20. This brings sealing part 10 into close contact with the mouth of container A, sealing the mouth of container A.

[0026] Next, after a predetermined time has elapsed in a predetermined humidity environment, the change in mass of the moisture absorbent B is measured. For example, the difference between the mass of the container A sealed with the moisture permeability measurement sealing device 1 before the predetermined time has elapsed and the mass of the container A sealed with the moisture permeability measurement sealing device 1 after the predetermined time has elapsed is measured. This allows the amount of water vapor transmitted through the container A (water vapor transmission rate), i.e., the moisture permeability / moisture permeability of the container A, to be measured (see arrow).

[0027] When removing the sealing device 1 for measuring moisture permeability from the container A, each of the connecting members 24 of the fixed part 20 is loosened using each of the second tightening / loosening members 25 of the fixed part 20, and the belt member 21 of the fixed part 20 is loosened using the first tightening / loosening member 22 of the fixed part 20.

[0028] As described above, according to the sealing device for moisture permeability measurement 1 of this embodiment, The first fastening member 22 of the fixing part 20 fastens the band member 21 of the fixing part 20, thereby fixing the sealing part 10 to the container A; By tightening the connecting member 24 of the fixing part 20 with the second tightening / loosening member 25 of the fixing part 20, the sealing part 10 can be brought into close contact with the opening of the container A, thereby sealing the opening of the container A. This allows the amount of water vapor that has passed through container A (water vapor permeability), i.e., the moisture permeability / moisture permeability of container A, to be easily measured by placing moisture absorbent B inside container A and measuring the change in mass of the moisture absorbent after a predetermined time has passed in a predetermined humid environment.

[0029] Furthermore, unlike the conventional ball-plug seal shown in FIG. 17, the measurement can be performed inexpensively and simply without using expensive measuring equipment.

[0030] Furthermore, the sealing performance can be maintained when the container is transported, making it possible to carry the container to weight measurement and evaluation environments, which was difficult with conventional ball-plug seals.

[0031] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various changes and modifications are possible.

[0032] (Variation) Fig. 12 is a perspective view showing a modified example of the sealing part in the sealing device for moisture permeability measurement shown in Fig. 1. Fig. 13 is a front view of the modified example of the sealing part shown in Fig. 12, and Fig. 14 is a top view of the modified example of the sealing part shown in Fig. 12. As shown in Figs. 12 to 14, each of the through holes 12A in the flat plate member 12 of the sealing part 10 may have an elongated shape extending radially from the center.

[0033] This allows application to various mouth sizes or opening shapes, and various container sizes or container shapes, by simply changing the size of gasket 11 as shown by the solid and broken lines in Figs. [Explanation of symbols]

[0034] 1 Sealing device for moisture permeability measurement 10 Sealing part 11 Encapsulating material 12 Flat plate members 12A through hole 20 Fixed part 21 Belt member 22 First fastening member 23 Auxiliary parts 23A,23B through hole 24 Connecting member 25 Second fastening member A container B. Moisture absorbent

Claims

1. An apparatus for sealing a mouth of a container for measuring the moisture permeability of the container, comprising: a sealing portion that seals the mouth of the container; a fixing portion that fixes the sealing portion to the container; Equipped with The fixing portion is a belt member that surrounds the container; a first fastening member for fastening or loosening the belt member; At least three connecting members connecting the sealing portion and the band member; at least three second fastening members for fastening or loosening the at least three connecting members, respectively; A sealing device for measuring moisture permeability, comprising:

2. The sealing portion is a sealing material in contact with the mouth of the container; a flat plate member facing the mouth of the container via the sealing material; The sealing device for measuring moisture permeability according to claim 1, comprising:

3. the flat plate member of the sealing portion has at least three through holes; the fixing portion includes at least three auxiliary members connected to the belt member, each having a through hole; each of the at least three connecting members is a bolt that is inserted through a corresponding one of at least three through holes of the flat plate member of the sealing portion and a corresponding one of at least three through holes of the auxiliary member of the fixing portion; Each of the at least three second tightening / loosening members is a nut fitted onto each of the bolts. The sealing device for measuring moisture permeability according to claim 2.

4. 4. The sealing device for moisture permeability measurement according to claim 3, wherein each of the at least three through holes in the flat plate member of the sealing portion has an elongated shape extending radially from a center.

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