JP5052650B2 - Packaging materials and packages - Google Patents

Description

  The present invention relates to a packaging material and a packaging body, and more particularly, to a packaging material and a packaging body suitable for use in packaging an article that deteriorates due to light or oxygen.

  Conventionally, in a packaging body that wraps an article that deteriorates due to light and oxygen, a packaging material formed of an aluminum laminate film is generally used as a member having a light shielding property and a gas barrier property (for example, Patent Document 1). etc).

JP 2002-85518 A

  In the aluminum laminate film package, a gas indicator (gas detector) is enclosed with the contents for the purpose of pinhole detection. However, the aluminum laminate film package is opaque, so the contents cannot be seen as it is, and the packaging There was a problem that the change of the indicator could not be known until the body was opened.

  Then, an object of this invention is to provide the packaging material which can visually recognize the indicator color of an indicator from the outside, while having light-shielding property, and a package.

  In order to achieve the above object, a packaging material according to the present invention includes an outer layer having a gas barrier property, an inner layer having gas permeability, and a gas detector provided inside the outer layer, and an inner side. The indication color of the gas detection unit can be visually recognized from the outside by providing light shielding to a layer, a gas detection unit, or a combination of a part of the outer layer and the inner layer or the gas detection unit. It is characterized by having a light shielding property.

  In addition, as a second means, the packaging material according to the present invention has a technical feature of making it possible to visually recognize the support color of the gas detector disposed inside while having gas barrier properties and light shielding properties. As a first means, it has an outer layer having translucency and gas barrier properties, an inner layer having light shielding properties and gas permeability, and a gas detector provided between the outer layer and the inner layer. It is characterized by that.

  Further, as a third means, the packaging material according to the present invention has a gas permeability and an outer layer in which a window portion made of a layer having a light transmitting property and a gas barrier property is formed on a layer having a light shielding property and a gas barrier property. It has an inside layer, and a light-shielding gas detector provided between the outside layer and the inside layer and covering the window from the inside.

  Further, as a fourth means, the packaging material according to the present invention comprises an outer layer in which a window portion comprising a layer having a light transmitting property and a gas barrier property is formed on a layer having a light shielding property and a gas barrier property, and a gas permeability and at least An area corresponding to the viewing window includes an inner layer having a light shielding property, and a gas detection unit provided between the outer layer and the inner layer.

  In any one of the first to fourth means, as the fifth means, the inner layer has a color different from the indication color of the gas detection part, or as the sixth means, the gas detection part and the It is preferable that a layer of a color different from the indication color of the gas detection unit is interposed between the inner layer and the inner layer.

  Moreover, in order to achieve the said objective, the package which concerns on this invention is formed using the said packaging materials in any one of the said 1st-6th.

  Furthermore, in order to achieve the said objective, the gas indicator film for packaging materials which concerns on this invention contains a colored pigment and gas detection ink material, It is characterized by the above-mentioned.

  In the present invention, by adopting the above-described means, the indication color of the gas detection unit can be visually recognized from the outside while providing light shielding properties.

It is sectional drawing which shows 1st Embodiment of the packaging material which concerns on this invention. It is sectional drawing which shows the change aspect of 1st Embodiment. It is sectional drawing which shows the package body formed with the packaging material of 1st Embodiment. It is sectional drawing which shows 2nd Embodiment of the packaging material which concerns on this invention. It is sectional drawing which shows 3rd Embodiment of the packaging material which concerns on this invention.

  Embodiments of a packaging material and a package according to the present invention will be described below with reference to FIGS.

  First, a first embodiment of a packaging material according to the present invention will be described with reference to FIG. The packaging material 1 shown in FIG. 1 has an outer layer 2, a gas detector 3, and an inner layer 4.

  The outer layer 2 is formed of a material having translucency and gas barrier properties. Examples of such materials include films obtained by depositing inorganic oxides such as silicon oxide and aluminum oxide on PET (polyethylene terephthalate), EVOH (ethylene vinyl acetate alcohol copolymer), O-PVA (biaxially stretched polyvinyl alcohol). Alternatively, PVDC (vinylidene chloride copolymer) can be exemplified.

  The “translucency” in the present invention is not limited as long as it has at least transparency that allows the change in color tone in the gas detection unit 3 to be discriminated, and may be slightly colored.

In the present invention, the “gas barrier property” means that the permeation amount of oxygen gas is 50 ml / m ² · 24 h · atm or less, preferably 1.0 ml / m ² · 24 h · atm or less, and the permeation amount of carbon dioxide gas is 50 ml. / M ² · 24h · atm or less, preferably 10 ml / m ² · 24h · atm or less. If the gas barrier property exceeds this range, the gas permeates from the outer layer 2 that is permeable and has a gas barrier property regardless of whether the packaging material has pinholes, or the concentration of the permeated gas or residual gas. This is because the gas detector 3 reacts.

  The gas detection unit 3 can use a known object such as an oxygen gas detection agent or a carbon dioxide detection agent. For example, when the inside of the package is replaced with gas so as not to contain oxygen gas, a gas detection agent that detects oxygen gas can be used, and specific examples include Ageless Eye (registered trademark). When the inside of the package is replaced with carbon dioxide, a carbon dioxide indicator that changes due to pH change due to the concentration of carbon dioxide can be used. By using an ink type gas detection agent in the form of a coating film as the gas detection agent, the thickness of the packaging material can be reduced.

  The inner layer 4 is formed of a material having light shielding properties and gas permeability. As such a material, for example, a known material such as a resin film containing a colored pigment or a colored ink coating film can be used.

  The resin can be selected from thermoplastic resins such as LLDPE (linear low density polyethylene), LDPE (low density polyethylene), medium density polyethylene, and polypropylene made of an ethylene-α-olefin copolymer.

  As the colored pigment, organic pigments such as red, yellow, blue, brown, black, or inorganic pigments can be used. Among organic pigments, phthalocyanine pigments, insoluble azo pigments, azo lake pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, diketopyrrolopyrrole pigments, anthrapyridine pigments, ansanthrone pigments, indanthrone pigments, flavanthrone pigments, pyrinone pigments, pyrylenes Examples thereof include pigments, isoindolinone pigments and thioindigo pigments. For inorganic pigments, iron oxide, ultramarine, bitumen, cobalt oxide, strontium chromate, titanium yellow, titanium black, dinchloromate, iron black, molybdenum red, molybdenum white, lithopone, emerald green, cadmium yellow, cadmium red, cobalt blue, etc. Can be illustrated.

  The inner layer 4 is preferably mixed with a pigment so as to have a color different from the color indicated by the gas detector 3 so that the color indicated is easily visible. In particular, by making it white, it becomes easy to visually recognize whatever color the gas detector 3 indicates. Alternatively, as shown in FIG. 2, a layer 5 having a color different from the indicated color may be provided between the gas detection unit 3 and the inner layer 4. Such a layer 5 can be formed by a colored film, a colored ink coating film, etc., for example.

  The content of the pigment is preferably 3 to 40% by weight with respect to the resin in order to obtain both moderate strength and sufficient light shielding properties. In that case, the thickness of the inner layer varies depending on the light shielding properties required for the contents, but if the contents are an infusion solution containing vitamin B1, sufficient light shielding properties can be obtained if it is at least 1 mm or more.

  A gas permeable sealant film can be further bonded or laminated on the inner side of the inner layer 4.

  If the packaging body 1 as shown in FIG. 3 is formed by packaging the drug container 6 with the packaging material 1 having the above-described configuration, replacing the gas, and then sealing by heat sealing or adhesion, the outer layer 2 is translucent. Therefore, the indication color of the gas detector 3 on the inside can be visually recognized, and the outer layer 2 has a gas barrier property, thereby preventing gas from entering from the outside. Further, since the inner layer has a light shielding property, it is possible to block the entry of light harmful to the contents from the outside. When there is a pinhole in the packaging material 1, the concentration change in which the gas that has entered through the pinhole or the gas that has escaped from the pinhole remains in the package passes through the inner layer 4 and is detected by the gas detector 3. Is detected.

Next, a second embodiment of the packaging material according to the present invention will be described with reference to FIG. A packaging material 1 ′ shown in FIG. 4 includes an outer layer 2 ′ in which a part of a layer having a light shielding property and a gas barrier property is formed by a window portion 8 made of a layer having a light transmitting property and a gas barrier property, and a gas permeable property. And a light-shielding gas detector 3 that is provided between the outer layer 2 ′ and the inner layer 4 ′ and covers the window 8 from the inside. The light shielding gas detector 3 has a larger area than the window 8 and covers all of the window 8. Examples of the light shielding and gas barrier layer include an aluminum foil, an aluminum vapor deposition film, Or the multilayer film which laminated | stacked the gas barrier layer and the light shielding layer can be illustrated. As the gas barrier layer, the same material as that of the outer layer described in the first embodiment can be used. As the light shielding layer, the same material as the inner layer described in the first embodiment can be used.

  As the window portion 8 having translucency and gas barrier properties, the same material as that of the outer layer described in the first embodiment can be used.

  The inner layer 4 ′ having gas permeability may or may not have light shielding properties, and the same material as the inner layer of the first embodiment can be used as the material having light shielding properties, and has light shielding properties. As the material having gas permeability, for example, a resin selected from LLDPE (linear low density polyethylene), LDPE (low density polyethylene), medium density polyethylene, polypropylene and the like made of an ethylene-α-olefin copolymer. Material can be used.

  The light-shielding gas detection unit 3 'is preferably a tablet such as an ageless eye. Although not shown, not only the light shielding gas detection part 3 of the tablet but also an ink type gas detection agent can be used as a light shielding gas detection part by mixing a colored pigment.

  According to the package formed using the packaging material 1 ′ having the above configuration, the ingress of light that affects the contents is blocked by the outer layer 2 ′ except the window portion 8 and the gas detection unit 3 ′. Ingress of gas from the outside is blocked by the outer layer 2 '. When a pinhole is present in the package, the gas that has entered from the outside passes through the inner layer 4 ′ and is detected by the gas detection unit 3 ′, and the indication color can be viewed through the window 8.

  In addition, the resin film containing a colored pigment and a gas detection ink material can be used as a light-shielding gas indicator film for a packaging material by itself. When a light-shielding film was used as a packaging material for packaging an article that deteriorates due to light, even if the article decayed due to oxidation, it could not be seen from the outside and could not be confirmed until the package was opened. If such a light-shielding gas indicator film is used, it is possible to confirm from the outside the indication color of the gas detection section that changes due to the carbon dioxide gas generated from the spoiled article while having light-shielding properties. Of course, you may laminate | stack the outer layer which has gas barrier property on the outer side of this light-shielding gas indicator film.

  Next, a third embodiment of the packaging material according to the present invention will be described with reference to FIG.

  The packaging material 1 ″ shown in FIG. 5 includes an outer layer 2 ′ in which a window portion 8 made of a layer having a light-transmitting property and a gas-barrier property is formed on a part of the layer having a light-shielding property and a gas-barrier property, At least a region corresponding to the window portion 8 includes an inner layer 4 ″ having a light shielding property, and a gas detection unit 3 provided between the outer layer 2 ′ and the inner layer 4 ″.

  The outer layer 2 ′ can have the same configuration using the same material as that of the outer layer of the second embodiment.

  In the inner layer 4 ″, at least the region corresponding to the window portion 8 can be formed of the same material as that of the inner layer of the first embodiment. Therefore, the inner layer 4 ″ is entirely formed of the first embodiment. May be formed of the same material as that described above, or only the region corresponding to the window portion 8 is formed of the same material as that of the first embodiment, and the other portions are resin materials having gas permeability, such as ethylene. You may form with LLDPE (linear low density polyethylene), LDPE (low density polyethylene), medium density polyethylene, polypropylene, etc. which consist of -alpha-olefin copolymer.

  The gas detection unit 3 can use the same material as in the first embodiment.

  In the package formed by the packaging material having the above-described structure, the ingress of light that affects the contents is blocked by the outer layer 2 ′ and the inner layer 4 ″, and the ingress of gas from the outside is prevented by the outer layer. In the case where a pinhole is generated in the package, the gas detection unit 3 detects the pinhole through the inner layer 4 ″.

Example 1
L-cysteine hydrochloride (Wako Pure Chemical Industries)… 6.0 g
Methylene blue (Wako Pure Chemical Industries)… 4.0 g
Isopropyl alcohol (Osaka Printing Ink) 33.0g
Water: 100.0g
Yellow ink (WS Yellow-2RN-1T manufactured by Stealing Ink Co., Ltd.) containing 1 part of the above-described oxygen detection ink solution having oxygen detection capability mixed with 50 parts of polyvinyl alcohol (JIS41C) and further containing an ultraviolet absorber. 5 parts was added and kneaded in a sand mill for 1 hour to obtain an oxygen detecting ink composition using a water-soluble binder resin.

The oxygen detection ink composition was printed by gravure printing on a PVA film of oxygen barrier packaging material having an oxygen permeability of 0.5 ml / m ² · 24 h · atm, and a white ink was printed thereon. A PE film of “Monochrome White PE” manufactured by Idemitsu Plastic Co., Ltd. was laminated on the printed surface to form a sealant layer. Further, a PET film was laminated on the surface of the PVA film to obtain a packaging material.

  A polyethylene container containing 900 mL of a high-calorie infusion consisting of three chambers of amino acid, sugar solution and vitamin was prepared as the contents.

  Prepare two sheets of the packaging material having the gas detection part prepared above, wrap the polyethylene container with the sealant layer inside, and replace the space (about 100 mL) between the container and the packaging material with nitrogen gas, An oxygen scavenger AGELESS (ZH-100P: registered trademark, the same applies hereinafter) was placed in a nitrogen atmosphere, and the heat seal layer was heat sealed to form a sealed package.

  The space became oxygen-free 24 hours after sealing, and this was confirmed by the fact that the gas detection part that was blue immediately after sealing turned yellow after 24 hours.

Comparative Example 1
An LDPE film was laminated to an oxygen barrier package aluminum film to form a sealant layer, and a PET film was laminated to the surface layer to obtain a barrier film. Ageless eye made by Mitsubishi Gas Chemical was used as the oxygen indicator.

  A polyethylene container (900 mL) containing the same preparation as in Example 1 was placed in the barrier film together with the oxygen scavenger Ageless (ZH-100P), and the space between the container and the barrier film (volume of about 100 mL) was nitrogen. After gas replacement, it was stored under each condition as anoxic state.

24 hours after sealing, it was confirmed that the space was in an oxygen-free state when measured using an O ₂ / CO ₂ concentration meter (PG-1000 manufactured by Toray Engineering Co., Ltd.). Since the film was opaque, it could not be confirmed because the ageless eye changed color.

Example 2
The ink composition for oxygen detection described in Example 1 was applied onto an alumina-deposited PET film by screen printing in the same manner as in Example 1, dried at 70 ° C. for 1 hour, and printed with white ink thereon. . A PE film of “Monochrome White PE” manufactured by Idemitsu Plastic Co., Ltd. was laminated on the printed surface to form a sealant layer. Furthermore, the PET film was laminated on the non-printing surface of the alumina-deposited PET film to obtain a packaging material.

  A polyethylene container (900 mL) containing the same preparation as in Example 1 was prepared as the contents.

  Prepare two sheets of the packaging material having the gas detection part prepared above, wrap the polyethylene container with the sealant layer inside, and replace the space (about 100 mL) between the container and the packaging material with nitrogen gas, An oxygen scavenger AGELESS (ZH-100P) was put in a nitrogen atmosphere, and the heat seal layer was heat sealed to obtain a sealed package.

  The space became oxygen-free 24 hours after sealing, and this was confirmed by the fact that the gas detection part that was blue immediately after sealing turned yellow after 24 hours.

Comparative Example 2
A polyethylene container (900 mL) containing the same lumber as in Example 2, Ageless Eye, Ageless (ZH-100), and an aluminum film barrier wrapping material on which no oxygen gas detection member is printed. After replacing the space with the material (volume of about 30 mL) with nitrogen gas, the packaging material was sealed to obtain Comparative Example 2.

24 hours after sealing, it was confirmed that the space was in an oxygen-free state when measured using an O ₂ / CO ₂ concentration meter (PG-1000 manufactured by Toray Engineering Co., Ltd.). Since the film was opaque, it could not be confirmed because the ageless eye changed color.

Test Examples Examples 1 and 2 and Comparative Examples 1 and 2 were prepared according to the present invention packaged with 4 injection needles (27G, Terumo, Neorus (registered trademark)) having a diameter of about 500 μm and a short diameter of about 50 μm. A pinhole was formed, and the indication color of the gas detection part in the package was visually recognized from the outside. Thereafter, the four bodies were opened, and the indication color of the gas detector was visually confirmed. The results are shown in Table 1.

1, 1 ', 1 "Packaging material 2, 2' Outer layer 3, 3 'Gas detection unit 4, 4', 4" Inner layer 5 Layer of color different from the support color of gas detection unit 7 Packaging 8 Window

Claims (2)

An outer layer having translucency and gas barrier properties, an inner layer having light shielding properties and gas permeability, and a gas detector provided between the outer layer and the inner layer,
The gas detection part is formed by coating an ink type gas detection agent on the outer layer or the inner layer,
The inner layer is formed in a color different from the indication color of the gas detection unit,
And it has a role as a sealant layer,
Furthermore, the light-shielding layer is only the inner layer,
The content is an infusion containing vitamin B1,
The inner layer has a configuration including at least one layer containing a black colored pigment,
A packaging material, wherein a white layer is provided between the gas detector and the inner layer. It is formed using the packaging material of Claim 1, The package body characterized by the above-mentioned.

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