JP2000313474A - Blister package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the adhesive strength by adhering a cardboard or a resin sheet of a mount to seal an opening part of a lid body to the lid body. SOLUTION: A blister packaging body seals an opening part 2a of a lid body 2 by adhering a plurality of layers of mounts 1 having a gas barrier layer between an adhesive cardboard or resin sheet and a non-adhesive cardboard or resin sheet to the lid body 2 formed of a thermoplastic synthetic resin with the gas barrier property, and the high adhesive strength can be obtained since the cardboard or the resin sheet of the mount 1 is adhered to the lid body 2. Since the mount 1 is difficult to peel from the lid body 2, and thus, volatilization of a chemical in a content 3 stored within the lid body 2, deformation of the content 3, leakage of the odor, degradation, etc., can be prevented in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blister package having a gas barrier layer for preventing a chemical from volatilizing.

[0002]

2. Description of the Related Art Conventionally, as a package of this type, for example, a package described in Japanese Utility Model Publication No. 62-7568 is known. The blister package of the above publication forms a mount with a laminated sheet in which a paperboard and an aluminum foil having gas barrier properties are stacked, and the mount is placed on the opening of the synthetic resin molded body, and is placed on the aluminum foil layer of the mount. The synthetic resin molded article and the backing sheet are thermally bonded by the formed heat sealing agent layer, and have effects such as stable sealing properties being obtained over a long period of time.

[0003]

However, in the above-mentioned conventional blister package, the backing sheet and the synthetic resin molded body are heat-bonded by the heat sealing agent layer formed on the aluminum foil layer of the backing sheet. There is a problem that the strength is weak and the backing sheet is easily peeled off from the synthetic resin molded body.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. By increasing the adhesive strength between the backing sheet and the synthetic resin molded article, the blister does not easily peel off from the synthetic resin molded article. It is intended to provide a package.

[0005]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 is characterized in that a lid made of a thermoplastic synthetic resin molded body having a gas barrier property is provided with a paperboard or a resin plate that has been subjected to an adhesive processing. A plurality of layers of a backing sheet having a gas barrier layer formed between an untreated board and a resin board are adhered to seal the opening of the lid.

In order to achieve the above object, according to the second aspect of the present invention, the thickness of the gas barrier layer is set to 0.01 to 100 μm.

In order to achieve the above object, the invention according to claim 3 is characterized in that the material used for the gas barrier layer is a metal such as aluminum or a resin such as polyethylene terephthalate.
Alternatively, it is formed by depositing aluminum, silica, alumina or the like.

[0008] In order to achieve the above object, the invention according to claim 4 is characterized in that the thickness of the paperboard or the resin plate is 1000 g / m ^2.
It is as follows.

In order to achieve the above object, the invention according to claim 5 is one in which a measured value in a leak tester test is 20 mmH ₂ O or less.

[0010]

[Operation] With the above configuration, the adhesive strength is remarkably improved as compared with a conventional aluminum foil bonded to a thermoplastic synthetic resin molded article, and a gas barrier layer of the mount is substantially equivalent to the one using the aluminum foil. Gas barrier properties can be obtained.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a blister package, and FIG. 2 is an enlarged sectional view of a mount. In the figure, 1 is a mount, 2
Denotes a lid formed of a thermoplastic synthetic resin.

The board 1 has a three-layer structure in which a gas barrier layer 1b is laminated between a board 1a and a board 1c, or
a and a three-layer structure in which a gas barrier layer 1b is laminated between a resin plate 1e, a three-layer structure in which a gas barrier layer 1b is laminated between a resin plate 1d and a paperboard 1c, or a gas barrier between the resin plate 1d and the resin plate 1e. It has a three-layer structure in which the layers 1b are stacked.

The paperboards 1a and 1c used for the mount 1
Is made of, for example, coated cardboard, cart paper, or manila cardboard, and the resin plates 1d and 1e are made of a synthetic resin having a gas barrier property, and both have a thickness of 1000 g / m ² or less. Is used. If the thickness is larger than this, the cost is increased, and the gas leaks from the interlayer of the paperboard 1a or the resin plate 1d itself, and the gas barrier property may be impaired.

The material used for the gas barrier layer 1b is a metal or resin such as aluminum or polyethylene terephthalate, or a material obtained by evaporating aluminum, silica, alumina or the like, and has a thickness of 0.01 to 100.
μm, preferably 0.05 to 50 μm. If the thickness is less than 0.01 μm, pinholes are likely to occur, and the purpose of gas barrier properties may not be fulfilled.
In the above, the thickness is too large to fulfill the purpose of the gas barrier property, which causes an increase in cost.

On the other hand, between the paperboard 1a and the gas barrier layer 1b,
Or between the paperboard 1a and the resin board 1e and the gas barrier layer 1b, or between the resin board 1d and the paperboard 1c and the gas barrier layer 1b
Between the resin plates 1d and 1e and the gas barrier layer 1b, an adhesive such as vinyl acetate resin, ethylene-vinyl acetate copolymer resin, or acrylic resin is interposed. By bonding
A mount 1 having a layer structure is configured.

As the thermoplastic synthetic resin used for the cover 2, a resin having gas barrier properties and excellent transparency, such as polyethylene terephthalate, polyethylene resin or polycarbonate resin, is used. It is formed in a substantially inverted concave shape having an opening 2a on the lower surface so that the contents 3 can be stored therein.

The backing 1 is bonded to the opening 2a of the lid 2 using an adhesive made of a polyolefin-based synthetic resin, whereby the opening 2a of the lid 2 is sealed.

The contents 3 to be stored in the lid 2 are, for example, flea collars, insecticide mats, fragrances, and the like, and are sealed to prevent volatilization of the chemicals during storage, leakage of odors, and deterioration. Are required. The drugs contained therein include insecticides, fungicides, insect growth inhibitors, synergists, various auxiliary solvents, fragrances and the like. For example, thereslin, dl, d-T80-aresulin, dl, d-T-
Aresulin, d, d-T-aresulin, d, d-T80
-Praletrin, d-T80-framethrin, transfluthrin, empensulin, permethrin, phenothrin, pyriproxyfen, triethyl phosphate and the like. Next, examples using the blister package of the present invention will be described, but the present invention is not limited thereto.

Example 1 As an example, a flea removal collar was packaged in a blister package of the present invention, and the time-dependent change in the residual ratio of the drug when stored was examined. The flea collar used in the test is impregnated with triethyl phosphate as an evaporative plasticizer in the collar resin in order to efficiently exude the active ingredient that is difficult to exude alone, to the collar resin surface. This is a mechanism whereby the active ingredient oozes out on the surface of the collar resin with volatilization. Therefore, in order to prevent seepage of the active ingredient under storage conditions before opening the package, a package having a gas barrier property for preventing volatilization of triethyl phosphate is required. In addition, when stored in a packaging form that does not have gas barrier properties, the active ingredient oozes out during storage, not only does not provide the necessary effect at the time of use, but also because the drug oozes out in the package, discoloration of the collar body, There is a problem that stickiness in the package is caused and the merchantability is impaired.

Therefore, in order to examine whether the blister package of the present invention can solve the above-mentioned problems, the phosphoric acid in the resin of the collar when the flea removing collar is packaged in the blister package of the present invention and stored at 60 ° C. Table 1 shows the results of examining the change over time in the residual ratio of triethyl. At the same time, the results of evaluating the stickiness in the package are shown in Table 2.

[0021]

[Table 1]

[0022]

[Table 2]

The blister package used in this test was 4
A coated cardboard 00g / m ^2, between the coated cardboard 127.9 g / m ² of an adhesive is applied to the polyolefin for bonding with a thermoplastic synthetic resin molded body on one side, 7 [mu] m is a gas barrier layer A backing sheet to which a polyethylene terephthalate molded article was thermally bonded as a thermoplastic synthetic resin molded article was used using a mount in which the aluminum foil was laminated with an acrylic resin emulsion adhesive. As a blank,
What was packaged in an aluminum bag and stored at 5 ° C. was used. In addition, as a comparative control, a comparison was made between those stored in a blister package using paperboard on which aluminum was not laminated as a mount.

From the above tests, as shown in Tables 1 and 2, it was confirmed that the blister package of the present invention had the same excellent gas barrier properties as a blank.

(Example 2) The results of examining the difference in adhesive strength between the same blister package used in Example 1 and the one obtained by directly welding a thermoplastic synthetic resin molded article to an aluminum foil are shown. 3 is shown. The content of 50 g was wrapped in 100 wrappers, and peeling of the thermoplastic synthetic resin molded product from the mount when transported for about 1500 km was confirmed.

[0026]

[Table 3]

As shown in Table 3 above, in the case of the conventional one in which the thermoplastic synthetic resin molded body was directly welded to the aluminum foil, 26 out of 100 pieces were peeled off. No body peeling occurred. From the above results, it was confirmed that the adhesive strength of the blister package of the present invention was significantly improved.

(Example 3) As a method for inspecting the gas barrier property of the blister package of the present invention, an investigation was carried out using a leak tester. For the test, the same package as that used in Examples 1 and 2 was used. With a leak tester, an inspection product is placed in an inspection chamber, suction or pressure is applied to the degree of vacuum set according to the inspection product strength, and pressure fluctuation in the inspection chamber due to leakage of the inspection product is directly detected by a leak sensor. It is a method. Therefore, when the inspection product has no gas barrier property or has a pinhole, the gas in the inspection product leaks into the inspection chamber, so that the pressure in the chamber increases. Table 4 shows the results of testing the gas barrier properties of the blister package of the present invention using this method.

[0029]

[Table 4]

From the results shown in Table 4, it was found that the blister package of the present invention had a leak value of 20 mmH ₂ O or less, and had a gas barrier property. The conventional one in which the thermoplastic synthetic resin molded article is directly welded to the aluminum foil has low adhesive strength, so that the thermoplastic synthetic resin molded article and the mount are directly peeled off when sucked in the inspection chamber, making measurement impossible. It was possible.

[0031]

According to the present invention, as described in detail above, since the board paperboard or resin plate for sealing the opening of the lid is adhered to the lid by an adhesive, the conventional aluminum foil can be adhered. Adhesive strength is significantly improved. This makes it difficult for the backing sheet to be peeled off from the cover body, so that the medicine in the contents contained in the cover body can be volatilized, the contents can be prevented from deforming, odor leakage, deterioration, etc., and the backing sheet can be prevented. Since a high gas barrier property is obtained by the gas barrier layer provided on the substrate, even when stored for a long period, the effective component of the contents oozes out, and problems such as the effects required at the time of use can not be obtained can be solved. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a blister package according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a mount used for a package.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mount, 1a, 1c ... Paperboard, 1b ... Gas barrier layer, 1
d, 1e: resin plate, 2: lid, 2a: opening, 3: contents.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E067 AB81 BB01A BB12A BB14A BC07A CA04 CA11 FB02

Claims (5)

[Claims] 1. A gas barrier layer is provided between a paperboard 1a or resin plate 1d obtained by bonding a lid 2 made of a thermoplastic synthetic resin molded body having gas barrier properties and an untreated paperboard 1c or resin plate 1e. A blister package, wherein a plurality of layers of backing paper (1b) formed thereon are bonded to each other to seal an opening (2a) of a lid (2). 2. The gas barrier layer 1b has a thickness of 0.01 to 1
The blister package according to claim 1, which has a thickness of 00 µm. 3. The blister package according to claim 1, wherein the material used for the gas barrier layer 1b is formed by applying a metal such as aluminum, a resin such as polyethylene terephthalate, or a vapor deposition of aluminum, silica, alumina or the like. body. 4. The paperboard 1a, c or the resin board 1d, 1
blister package of any one of claims 1 to 3 comprising a thickness of e as 1000 g / ^{m 2} or less. 5. The measured value of a leak tester test is 20 mmH
The blister package according to any one of claims 1 to 4, which has a content of ₂ O or less.