JP2001129914A - Gas barrier packaging material and packaged object using this packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas barrier packaging material which realizes the preparation of a gas barrier packaged object having a significant inhibitive effect upon the permeation of gas through the end face of the sealed part of the packaged object, even when the packaging material is used for a content whose precision is deteriorated by a trace of penetrating gas as well as the packaged object. SOLUTION: A gas barrier intermediate layer 13 is formed between a sealant layer 11 and a gas barrier layer 15. Two pieces of the gas barrier packaging material are superposed on each other with the sealant layers 11 set facing inwardly and the peripheries of the sealant layers 11 are thermally pressed to form a thermally fusible sealing part A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas barrier wrapping material which suppresses gas permeation from the wrapping material end face during transportation or storage after filling the contents, and a package using the same.

[0002]

2. Description of the Related Art As a gas barrier packaging material used for packaging fresh foods, pharmaceuticals, and the like, a composite packaging material obtained by laminating various films in multiple layers is generally used.

[0003] For example, as shown in FIG.
0) includes a non-stretched polypropylene film layer (1) as a sealant layer (a hermetic sealing adhesive layer), a urethane-based adhesive layer (2), a polyethylene terephthalate film layer (3), and a urethane-based adhesive layer (4), an aluminum foil layer (5) as a gas barrier layer, a urethane-based adhesive layer (6), a display pattern ink layer (7), and a polyethylene terephthalate film layer (8) were laminated in this order. Things are used.

FIG. 5 is a plan view of a four-side seal pouch showing an example of a package using the composite packaging material (10). FIG. 6 is a cross-sectional view showing the XX ′ cross section of the four-side seal pouch (20) in FIG. As shown in FIG. 5 and FIG. 6, a four-sided seal pouch (20) using the composite packaging material (10) is obtained by combining the composite packaging material (10) with a non-stretched polypropylene film layer (1) as a sealant layer. Are stacked on top of each other, filled with contents (not shown), heated and pressurized on the four sides of the rectangular shape, heat-sealed and sealed with each other, and sealed and sealed.

[0005] In such a four-side seal pouch (20) using the composite packaging material, the aluminum foil layer (5) is used as a gas barrier layer, so that the surface part (B) of the four-side seal pouch (20) is used. However, on the end face (C) of the seal portion (A) of the four-side seal pouch (20), the unstretched polypropylene film layer (1) and the polyethylene terephthalate film Gas permeation from the layer (3) does not sufficiently prevent gas permeation.

Therefore, for example, when such a four-sided seal pouch (20) is used for packaging of a medical blood glucose level measuring sensor, the blood glucose level is measured due to permeation of a very small amount of gas from the end face during long-term storage after packaging. There is a problem that the accuracy of the sensor for use deteriorates.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the accuracy is deteriorated due to the permeation of a very small amount of gas such as a blood glucose level sensor for medical use. Even when used for packaging contents, it does not degrade its accuracy for a long time after packaging, that is, a gas barrier property that enables a gas barrier package with a large effect of suppressing gas permeation from the end face of the seal portion of the package. It is an object to provide a packaging material. It is another object of the present invention to provide a package using the gas barrier packaging material.

[0008]

SUMMARY OF THE INVENTION The present invention is a gas-barrier packaging material comprising a gas-barrier intermediate layer between a sealant layer (adhesive layer for hermetic sealing) and a gas-barrier layer.

The present invention also provides the gas barrier packaging material according to the present invention, wherein the gas barrier intermediate layer is a ceramic vapor-deposited film, an aluminum vapor-deposited film, a polyvinylidene dichloride-coated film, or an aluminum foil. It is a gas barrier packaging material.

Further, the present invention is characterized in that a heat-sealing seal formed by laminating two gas-barrier packaging materials according to the present invention with the sealant layer as an inner surface and heating and pressurizing the periphery is provided. It is a gas barrier packaging body.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is an enlarged sectional view showing a part of an embodiment of the gas barrier packaging material according to the present invention. As shown in FIG. 1, the gas barrier wrapping material (30) according to the present invention comprises an unstretched polypropylene film layer (11) as a sealant layer (adhesive layer for hermetic sealing), a urethane-based adhesive layer (12), A gas barrier intermediate layer (13), a urethane-based adhesive layer (14), an aluminum foil layer (15) as a gas barrier layer, and a urethane-based adhesive layer (16).
The display picture ink layer (17) and the polyethylene terephthalate film layer (18) are formed by laminating in this order.

The gas barrier intermediate layer (13) is composed of a film (23) and a gas barrier material (33), and the gas barrier material (33) of the gas barrier intermediate layer (13) has a non-stretched polypropylene film layer (11). It has become closely adhered to. And this gas barrier intermediate layer (13)
Is provided between a non-stretched polypropylene film layer (11) as a sealant layer and an aluminum foil layer (15) as a gas barrier layer in the gas barrier packaging material (30).

FIG. 2 is a plan view of a four-side seal pouch showing an example of a package using the gas barrier packaging material (30) according to the present invention. FIG. 3 is a cross-sectional view showing a cross section XX ′ of the four-side seal pouch (40) in FIG.
As shown in FIGS. 2 and 3, the four-sided seal pouch (40) using the gas barrier packaging material (30) according to the present invention comprises:
The gas-barrier packaging material (30) is placed on the inner surface with the unstretched polypropylene film layer (11) as the sealant layer.
Laminating, filling the contents (not shown), applying heat and pressure to the four sides of the rectangular shape, heat sealing and sealing each other to form a bag,
Hermetically sealed.

The gas barrier wrapping material according to the present invention has the above-described structure. In the four-side seal pouch (40) using such a gas barrier wrapping material, an aluminum foil layer ( By using the gas barrier intermediate layer (13) and the gas barrier intermediate layer (13), gas permeation from the surface portion (B) of the four-side seal pouch (40) can be more sufficiently prevented. In addition, the gas barrier intermediate layer (13) is used on the end face (C) of the seal portion (A) of the four-side seal pouch (40),
Gas permeation from this portion can be sufficiently prevented.

Therefore, for example, when such a four-sided seal pouch (40) is used for packaging of a blood glucose level sensor for medical use, permeation of a trace amount of gas from the end face during long-term storage after packaging is suppressed, and blood glucose is reduced. The accuracy of the value measurement sensor does not deteriorate.

The gas-barrier intermediate layer in the present invention comprises polyethylene terephthalate, biaxially oriented polypropylene,
A gas barrier material is provided on a film of nylon, polyethylene, or the like, and the gas barrier material is ceramic, polyvinylidene dichloride, aluminum, or the like, and these are formed on the film by vapor deposition, coating, or the like. It is. Also, an aluminum foil can be used as the gas barrier intermediate layer.

In the present invention, the lamination of the sealant layer and the gas barrier intermediate layer is preferably performed by dry lamination such that the gas barrier material of the gas barrier intermediate layer is in close contact with the sealant layer.

[0018]

The present invention will be described in detail with reference to the following examples. <Example 1> As shown in Fig. 1, a printing ink layer (17) having a pattern, a color, or a content name or brand to be filled in a pouch as appropriate by a gravure printing method was formed to a thickness of 12 µm.
An aluminum foil layer (15) having a thickness of 15 μm was dry-laminated on the surface of the printing ink layer (17) of the transparent or translucent polyethylene terephthalate film layer (18) with a urethane-based adhesive layer (16). .

Next, a gas-barrier intermediate layer (13) obtained by vapor-depositing (33) aluminum oxide on a 12 μm-thick polyethylene terephthalate film (23) is formed on the lower surface of the aluminum foil layer (15). A 60 μm-thick unstretched polypropylene film layer (11) as a sealant layer is dry-laminated on the lower surface of the gas-barrier intermediate layer via a urethane-based adhesive layer (14, 12), respectively. Was prepared.

(Evaluation of Performance) A four-sided seal pouch of 15 × 30 cm was prepared with a seal width of 5 mm, and the pouch was filled with about 100 g of calcium chloride. The pouch filled with about 100 g of this calcium chloride is treated at 40 ° C. × 90% RH for 3 hours.
The change in weight over a period of months was measured. The sealing surface is a flat seal bar. Table 1 shows the results.

[0021]

[Table 1]

Example 2 A 12 μm-thick polyethylene terephthalate film (2
A gas barrier packaging material of the present invention was produced in the same manner as in Example 1 except that a gas barrier intermediate layer on which aluminum was deposited (33) was used in 3). The performance evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Example 3 A 12 μm-thick polyethylene terephthalate film (2
A gas barrier packaging material of the present invention was produced in the same manner as in Example 1 except that the gas barrier intermediate layer coated with vinyl chloride (33) was used in 3). The performance evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 1 A 15 μm-thick aluminum foil layer was formed on a 12 μm-thick transparent or translucent polyethylene terephthalate film layer on which a printing ink layer was formed, via a urethane-based adhesive layer. Dry lamination was performed. Next, a polyethylene terephthalate film layer having a thickness of 12 μm on the lower surface of the aluminum foil layer, a non-stretched polypropylene film layer having a thickness of 60 μm as a sealant layer on the lower surface of the polyethylene terephthalate film layer, and a urethane-based adhesive layer interposed therebetween. Dry lamination was performed to produce the gas barrier packaging material of Comparative Example 1. The performance evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

[0025]

The present invention is a gas-barrier packaging material having a gas-barrier intermediate layer between a sealant layer (adhesive layer for hermetic sealing) and a gas-barrier layer. Even if it is used for packaging of contents whose accuracy is deteriorated by a very small amount of gas permeation, the accuracy is not deteriorated for a long time after packaging, that is, the effect of suppressing gas permeation from the end face of the seal part of the package. It becomes a gas barrier packaging material that enables a gas barrier packaging body having a large size.

Further, the present invention is a gas barrier package having a heat-sealing seal formed by laminating two of the above gas-barrier packaging materials with the sealant layer on the inner surface and heating and pressing the periphery. Even if it is used for packaging of contents whose accuracy is deteriorated by a very small amount of gas permeation, such as a blood glucose measurement sensor for medical use, the accuracy is not deteriorated for a long time after packaging, that is, the package This enables a gas barrier package having a large effect of suppressing gas permeation from the end face of the seal portion.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a part of an embodiment of a gas barrier packaging material according to the present invention.

FIG. 2 is a plan view of a four-sided seal pouch showing an example of a package using the gas barrier packaging material according to the present invention.

FIG. 3 is a cross-sectional view showing a cross section XX ′ of the four-side seal pouch in FIG. 2;

FIG. 4 is a sectional view showing an example of a composite packaging material.

FIG. 5 is a plan view of a four-side seal pouch showing an example of a package using a composite packaging material.

FIG. 6 is a cross-sectional view showing a XX ′ cross-section of the four-side seal pouch in FIG. 5;

[Explanation of symbols]

1, 11 {unstretched polypropylene film layer as sealant layer 2, 4, 6, 12, 14, 16} urethane-based adhesive layer 3, 8, 18} polyethylene terephthalate film layer 5, 15} gas barrier layer Aluminum foil layer 7, 17 {Picture design ink layer 10} Composite packaging material 13 Gas barrier intermediate layer 20 Square seal pouch 23 Film 30 Gas barrier packaging material according to the present invention 33 Gas barrier material 40 {four-side seal pouch using gas barrier packaging material according to the present invention A} seal part B {face part C} end face

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3E086 AD01 BA04 BA13 BA15 BA24 BA40 BB01 BB51 CA17 CA18 CA22 CA25 CA28 4F100 AA19 AB10C AB33C AD00C AK07 AK16C AK42 AK51G BA03 BA05 BA10A BA10B EC03 EH46C EH66CJB12 EB17 J02 GBH

Claims (3)

[Claims] 1. A gas barrier packaging material comprising a gas barrier intermediate layer between a sealant layer and a gas barrier layer. 2. The gas-barrier packaging material according to claim 1, wherein the gas-barrier intermediate layer is a ceramic-deposited film, an aluminum-deposited film, a polyvinylidene dichloride-coated film, or an aluminum foil. 3. A heat-sealing seal formed by laminating two gas-barrier packaging materials according to claim 1 with the sealant layer as an inner surface and heating and pressing the periphery. Characteristic gas barrier packaging.