JP2015052462A - Container for evaluating film permeability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container capable of correctly evaluating a target single component or a plurality of components simultaneously with neither volatilization nor adsorption in film permeability evaluation.SOLUTION: With a container for evaluating film permeability, by interposing a film with two cylindrical containers whose opening is an interposing part, a sealed space is formed by one surface of the film and one of the cylindrical containers, and a sealed space is formed by the other surface of the film and another cylindrical container. The interposing part of one of the cylindrical containers is composed of a projection made of frosted glass along the inner wall of the cylindrical container. The interposing part of the other cylindrical container is composed of a projection made of frosted glass along the outer wall of the cylindrical container.

Description

  The present invention relates to a container optimal for evaluating the permeability of a film.

  In recent years, as a packaging material for foods, pharmaceuticals, precision equipment, etc., a barrier film for preventing the deterioration and functional deterioration of contents has attracted attention. In the case of food, it is expected to protect the contents from oxygen and water vapor and prevent oxidation and decay. Conversely, some fragrances and the like are expected to have a scent retention role so as not to miss the scent.

  Until now, as a method for evaluating the permeability of the film as described above, a metal corrosion method typified by a Ca corrosion method as in Patent Document 1 has been adopted. In this method, a film having a calcium film formed on the inner surface is used as a test piece, the film formation surface of the calcium film is sealed, and the opposite surface is exposed to a constant temperature and humidity environment, and reacts with water vapor that has passed through the film. This is a method in which the amount of calcium corroded is seen through from the outside of the film and the water vapor transmission amount of the film is measured using image processing or the like. However, this method has limitations such as that the film used in the test must be transparent and limited to water vapor evaluation. Another problem is that it takes time to evaluate corrosion.

  In addition, after adding the target component in the film of a three-sided bag as in Patent Document 2, a method is prepared in which the remaining side is sealed and sealed, and the volatilization rate is determined from the change in weight over time. is there. However, in this method, the evaluation is based only on the weight, and it can be said that the method is specialized for the evaluation of a single component.

  Furthermore, there is a JIS standard Z 0208 “Testing method for moisture permeability of moisture-proof packaging materials”, and a moisture permeable agent / calcium chloride (anhydrous) is sealed in a moisture permeable cup, at regular intervals (every 24 hours, every 48 hours, or every 96 hours. ) Is repeated, and the mass increase of the cup is evaluated as the amount of water vapor permeated. However, this method mainly relates to water vapor transmission as in Patent Document 1, and it is difficult to simultaneously measure composite components as in Patent Document 2.

JP 2011-242354 A JP2013-014524A

  As a method for solving these problems, for example, there has been known a method in which a film is sandwiched between two cylindrical containers called separable flask containers and a sealed space is provided on the front and back of the film. In this method, the containers are sealed with rubber material. There is also a type in which a film is sandwiched without using a rubber material, but the sealing performance is poor. In that state, the target component is added to one sealed space via a septum, and after a predetermined time has passed, in order to examine how much the target component has moved to the other sealed space, the gas component is checked with a gas tight syringe. Collect volatile components and analyze. Although this method can simultaneously evaluate the composite component, it is difficult to accurately evaluate the permeability because the target component is adsorbed on the rubber-based material. In addition, since it is necessary to evaluate the film in contact with the sealed space with a constant area, it is necessary to seal the film without wrinkles, but the film may be twisted and wrinkled due to the contact between the rubber and the film. is there.

  It is an object of the present invention to provide a container capable of accurately evaluating a target single component or a plurality of components simultaneously without volatilization or adsorption in film permeability evaluation.

As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that the film is sandwiched between two cylindrical containers each having an opening portion as a sandwiching portion, so that one surface of the film and the cylindrical container are sandwiched between them. Forming a sealed space with one of the two, and forming a sealed space with the other side of the film and another one of the cylindrical containers,
The sandwiching portion of one of the cylindrical containers consists of a convex portion made of ground glass along the inner wall of the cylindrical container,
The sandwiched portion of another one of the cylindrical containers is composed of a convex portion made of ground glass along the outer wall of the cylindrical container,
By combining the convex portion composed of ground glass along the inner wall and the convex portion composed of ground glass along the outer wall, it can be sealed in a state of sandwiching the film,
A film permeability evaluation container characterized in that a side opening of the two cylindrical containers is provided with an opening with a septum for collecting a reagent and collecting a volatile component while maintaining a sealed space. is there.

  Moreover, when the invention according to claim 2 combines the convex part constituted by ground glass along the inner wall and the convex part constituted by ground glass along the outer wall, a film is formed between the convex parts. The film permeability evaluation container according to claim 1, wherein there is a space corresponding to a thickness.

  According to a third aspect of the present invention, at least two or more projections are provided on the side surfaces of the two cylindrical containers, respectively, and the projections and the columnar shape that one of the cylindrical containers has. 3. The film permeability evaluation container according to claim 1, wherein protrusions of another one of the containers are connected to each other with a spring or rubber. 4.

  The container of the present invention, in the shape of the sandwiched portion of the film, has a convex portion made of frosted glass in the sandwiched portion of the upper and lower containers, the convex portion along the outer wall on the lower side of the container having the convex portion along the inner wall Use the container with the upper side, place the lower container on top, place a film (sample) larger than the container opening area on top, lower the upper container vertically from above, and combine the upper and lower convex parts In this way, the film can be sealed without wrinkling. Furthermore, since no rubber-based material is used, the evaluation target component is not adsorbed on the rubber-based material, and high-accuracy film permeability evaluation is possible. In addition, by connecting the upper and lower containers with a spring or the like, the sealing property is increased and the target component does not volatilize, so that the film permeability can be evaluated.

It is the schematic which shows the whole container for film permeability evaluation of this invention. It is the schematic which shows the cross section (state which has not pinched the film) of the container for film permeability evaluation of this invention. It is the schematic which shows the cross section (state which has pinched | interposed the film) of the container for film permeability evaluation of this invention. It is a measurement result using the container for film permeability evaluation of the present invention. It is a measurement result using the container for film permeability evaluation of the present invention. It is a measurement result using a general container. It is a measurement result using a general container.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a schematic view showing the entire film permeability evaluation container of the present invention. Sealed spaces are formed on the front and back of the film by sandwiching the film between two cylindrical containers without lids, and reagent injection and volatile components are maintained while maintaining the sealed space via a septum on the side of the cylindrical container. It is possible to collect.

  FIG. 2 is a schematic view showing a cross section of the film permeability evaluation container of the present invention in a state where no film is sandwiched. In the two upper and lower container overlapping portions, the lower container has a ground glass convex portion along the inner wall, and the upper container has a ground glass convex portion along the outer wall. Moreover, when the convex part comprised with ground glass along the inner wall and the convex part comprised with ground glass along the outer wall are combined, there is a space corresponding to the film thickness between the convex parts. With the lower container placed, place a film (sample) larger than the container opening area on the convex part of the lower container, lower the upper container vertically from above, and combine the upper and lower convex parts together Can be sealed without wrinkles.

  FIG. 3 is a schematic view showing a cross section of the film permeability evaluation container of the present invention in a state where a film is sandwiched. When the upper and lower containers are stacked, a space is formed between the upper and lower convex portions (horizontal direction), so that even a certain film thickness can be sandwiched between the upper and lower containers. Further, the container is highly sealed by hooking a spring on a protrusion provided on the upper and lower containers with the film sandwiched between the upper and lower containers.

  The material of the upper and lower main bodies of the film permeability evaluation container of the present invention is preferably a material that does not adsorb volatile components such as glass and is resistant to chemicals.

  Specific examples of the present invention will be described below, but the technical scope of the present invention is not limited to these examples.

<Example>
A laminated film (packaging material) having a barrier property larger than the opening of the container is sandwiched between a cylindrical container (glass) having a diameter of 9.0 cm according to the present invention shown in FIG. 1 and fixed with a spring. Sealed. Using a microsyringe, 5.0 μl of ethanol was added to the space side in contact with the barrier surface of the laminated film via a septum, and evaluation with time was performed by heating at 60 ° C. in an oven (immediately after the addition, two and a half days). Then, take out the container from the oven, extract 1.0 ml of volatile components from the space where ethanol is not added through a septum using a gas tight syringe, and drive it into a gas chromatograph / mass spectrometer (GC / MS). The ethanol permeability of the packaging material was confirmed.
At the same time, volatile components were sampled from the space on the side where ethanol was added, and then injected into GC / MS, and the amount of ethanol that did not permeate was also confirmed.
In this embodiment, the barrier surface refers to the outer surface when the surface in contact with the contents of the laminated film is the inner surface and the surface in contact with the outside air is the outer surface.

<Comparative example>
On the other hand, it is not the container of the present invention shown in FIG. 1, but the appearance of the container is the same, a cylindrical shape with a diameter of 9.0 cm and a 250 ml capacity container (made of glass). A flat type container was used that was not provided with a spring for enhancing the sealing performance, and that the upper and lower containers were in close contact with a metal fitting via a rubber material (a container called a general separable flask). The other operations were the same as in the example, and a laminated film (packaging material) having a barrier property larger than that of the container opening was sandwiched. Using a microsyringe, 5.0 μl of ethanol was added to the side of the space in contact with the barrier surface through a septum, and the time was evaluated by heating at 60 ° C. in an oven (immediately after addition, two and a half days). Then, take out the container from the oven, extract 1.0 ml of volatile components from the space where ethanol is not added through a septum using a gas tight syringe, and drive it into a gas chromatograph / mass spectrometer (GC / MS). The ethanol permeability of the packaging material was confirmed.
At the same time, volatile components were sampled from the space on the side where ethanol was added, and then injected into GC / MS, and the amount of ethanol that did not permeate was also confirmed.

<Analysis results>
Table 1 shows the measurement results obtained by analyzing with the gas chromatograph / mass spectrometer (GC / MS) of Examples and Comparative Examples. Further, ion chromatograms obtained by GC / MS measurement and extracted at m / z = 45 characteristic of ethanol are attached to FIGS.

  As shown in Table 1, in the container of the present invention of the example, immediately after addition and after two and a half days, when the ethanol concentrations in the spaces on the front and back of the film (addition side, transmission side) are combined, the amount of added ethanol is almost the same. It can be seen that the film permeability can be evaluated without volatilization or adsorption of ethanol.

  On the other hand, in the general container of the comparative example, immediately after the addition, when the ethanol concentrations in the spaces on the front and back sides of the film (addition side, permeation side) were combined, the amount of added ethanol was almost the same, but when the two and a half days passed, Without it, you can see that it is decreasing. Presumably due to volatilization or adsorption.

  As described above, in order to evaluate the film permeability over time, it is necessary to perform the evaluation without volatilization or adsorption of the target component, and it can be seen that the container of the present invention is a suitable container.

1 ... cylindrical container (upper side)
2 ... Ground glass convex part and sandwiched part (along the outer wall)
3 ... Ground glass convex part, sandwiching part (along the outer wall)
4 ... Cylindrical container (lower side)
5 ... Septum 6 ... Film (sample)
7 ... Projections 8 ... Elastic body 9 ... Space

Claims (3)

By sandwiching the film with two cylindrical containers with the opening part as the sandwiching part,
A sealed space is formed by one surface of the film and one of the cylindrical containers;
A container forming a sealed space with the other side of the film and another one of the cylindrical containers,
The sandwiching portion of one of the cylindrical containers consists of a convex portion made of ground glass along the inner wall of the cylindrical container,
The sandwiched portion of another one of the cylindrical containers is composed of a convex portion made of ground glass along the outer wall of the cylindrical container,
By combining the convex portion composed of ground glass along the inner wall and the convex portion composed of ground glass along the outer wall, it can be sealed in a state of sandwiching the film,
A film permeability evaluation container characterized in that an opening with a septum for collecting a reagent and collecting a volatile component while keeping a sealed space is disposed on the side surfaces of the two cylindrical containers.   When combining a convex portion composed of ground glass along the inner wall and a convex portion composed of ground glass along the outer wall, there is a space for the film thickness between the convex portions. The film permeability evaluation container according to claim 1.   At least two or more protrusions are provided on the side surfaces of the two cylindrical containers, respectively, and the protrusions included in one of the cylindrical containers and the protrusions included in another one of the cylindrical containers are arranged. The film permeability evaluation container according to claim 1, wherein the film permeability evaluation container is connected by a spring or rubber.

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