JP2000344271A - Blister pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a novel blister pack in which raw materials for both of a mount and a transparent cover are suitably selected on the basis of barrier properties. SOLUTION: A polyester sheet expanded N-times is used for a mount 1 and, on the other hand, an A-PET cover or a PEN cover or a laminated cover of A-PET and PEN, each cover of which is three-dimensionally molded, is used for a transparent cover 2. Further, a vapor-deposited film in which a vapor-deposited layer of alumina or silicon deoxide is formed on a PEN film or on a PET film is laminated on the surface of the mount 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blister for providing cosmetics, quasi-drugs, medical instruments such as thermometers, or for storing stationery, dry batteries, toothbrushes, etc. inside a transparent three-dimensional package on a mount. It's about packs.

[0002]

Blister packs have been widely used as packaging containers for batteries and toothbrushes. This blister pack can substantially seal the contents, while the cover, which is a three-dimensional portion, can be made transparent, so that the contents can be visually confirmed, and it can be said that the blister pack is very excellent as a packaging container. .

[0003] By the way, these blister packs
Although it is composed of a mount and a transparent cover, these conventional materials are often made of a material in which the mount has a sandwich structure of aluminum or a composite material using polyvinylidene chloride (PVDC) or the like as a laminate material. For the transparent cover, PVC, polystyrene, or the like has been used. Recently, there is an example in which A-PET is used for the transparent cover.

[0004] However, PVC and PVDC are considered to be undesirable materials because they cause the generation of dioxin and hydrogen chloride, and should be avoided as much as possible. Separate collection of waste is common, but if the mount and the transparent cover are made of different materials, they must be separately disposed at home, which is troublesome. In particular, if aluminum foil was used, the separation was practically impossible.

[0005] Furthermore, the blister pack has the purpose of substantially sealing the contents. However, when the mount is paper, it cannot completely block the ventilation, but also does not allow the contents to dislike water vapor or the flavor component. In the case of having a blister pack, it must be almost sealed with a material having a barrier property as a blister pack, and it is necessary to develop a new structure in consideration of the barrier property according to the contents.

An object of the present invention is to solve the above-mentioned conventional problems, and to disclose a novel blister pack configuration in which the materials for the mount and the transparent cover are appropriately selected and furthermore, the barrier property is taken into consideration. And

[0007]

According to the present invention, as a blister pack for achieving the above-mentioned object, an N-fold expanded polyester sheet is used as a backing sheet, and a three-dimensionally molded A-PET (polyethylene) is used as a transparent cover. A means of using a (terephthalate) cover is adopted. Here, the N-fold expanded polyester sheet used for the backing sheet has moderate irregularities on the surface compared to the non-foamed material sheet having a smooth surface. Can be. Further, since the sheet and the transparent cover printed in this manner are made of the same material, they can be easily adhered to each other, and at the same time, it is not necessary to separate the mount and the cover when discarded.

On the other hand, as another means of the blister pack, an N-fold expanded polyester sheet is used for the backing paper, and a three-dimensionally molded PEN (polyethylene naphthalate) cover is used for the transparent cover. PEN resin has high gas barrier properties and can effectively block ultraviolet rays.
Suitable for long-term storage and display under fluorescent light. As still another means, a polyester sheet expanded N times in the same manner as the backing sheet was used, but a three-dimensionally molded laminate cover of A-PET and PEN was used as the transparent cover. The overall cost is suppressed while utilizing the advantages of the PEN resin.

Next, as the backing sheet of each of the above structures, a means was used in which a PEN film or a vapor-deposited film provided with a vapor-deposited layer of alumina or silicon dioxide on a PET film was further laminated on the surface of the polyester sheet. The PEN resin has a high gas barrier property and can effectively block ultraviolet rays. The reason why the vapor-deposited layer is provided on the PET film is to improve gas barrier properties. The PEN resin has a higher gas barrier property than the PET resin, and secures sufficient barrier property as it is. Therefore, it is not always necessary to deposit an inorganic substance on the PEN resin. When the polyester sheet according to claim 3 is a PEN sheet, it is not always necessary to further laminate a PEN film for barrier properties. Therefore, the polyester sheet described in this claim will normally be a PET sheet.

In the present invention, a polyester sheet is technically used,
And PET and PEN are used separately, but PET and PEN are also polyester-based. If these do not need to be distinguished, they are called polyester, and if they need to be distinguished, they are PET and PEN respectively.
And

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a typical blister pack, and the contents are omitted. Here, 1 is a mount, and 2 is a transparent cover. The mount 1 is made by expanding A-PET three times,
It is opaque because it contains many air bubbles inside the sheet. Since the mount 1 is formed by foaming in this manner, the surface thereof has a very dense and fine mat shape due to irregularities caused by foaming. Therefore, the printing ink can be satisfactorily loaded, and can be printed without any processing. The reason why the foaming ratio of the backing paper is 3 to 5 times is that if the foaming ratio is too low, the surface is too smooth to be suitable for printing, but if the foaming ratio is too high, the surface is too rough,
Also, it is too flexible for the mount. However, 3 ~
Five times is appropriate, but the present invention does not strictly limit the expansion ratio. The transparent cover 2 is formed by molding A-PET by vacuum molding or pressure molding, and has a three-dimensional shape that matches the three-dimensional shape of the contents. Needless to say, the method of forming the transparent cover 2 is not limited to the above-described method.

Next, for bonding the mount 1 and the transparent cover 2, any welding means or bonding means can be adopted from a plurality of means. For example, in the case of heat welding, the flange of the transparent cover 2 is used. The two are joined and welded by a hot press having a shape corresponding to 2a. Alternatively, even in the case of ultrasonic bonding, both can be securely bonded by appropriately employing a known ultrasonic bonding means. These can be processed in exactly the same manner whether or not the surface of the mount 1 is printed.

Incidentally, the mounting of the mount 1 and the transparent cover 2 can be performed by using a solvent type adhesive. In this case, it is efficient and convenient to print the specification table and the like simultaneously with the application of the adhesive to the backing paper.

Next, as a second embodiment of the blister pack of the present invention, the mount 1 is made of PET resin, and a layer of alumina (Al 2 O 3) or silicon dioxide (SiO 2) is deposited on the PET film on the surface side. What laminated | stacked the vapor deposition film which carried out was used. When the mount 1 is made of only PET resin, the gas barrier properties are insufficient due to the characteristics of the material. Therefore, those that are unstable to oxygen in the air may not be used,
These inorganic substances were deposited to ensure gas barrier properties. Since these materials are inorganic and do not need to be separated even during incineration, the provision of a vapor-deposited layer is sufficiently in line with the object of the present invention.

As a modified example of the above-described embodiment, the backing sheet 1 is made of PET resin, and a thin PEN film is laminated on the surface side. In consideration of gas barrier properties, etc., PEN resin shows better characteristics than PET resin.
This is to improve the barrier properties in all directions. It has already been described that it is not necessary to deposit an inorganic substance such as alumina on the PEN resin.

Next, as another embodiment, the mount 1 is made of PET resin as in the second embodiment, and the transparent cover 2 is also made of PEN resin, as opposed to a laminate in which a vapor deposition film or a PEN film is laminated. Configured. PE
N resin is inherently low in gas permeability, excellent in heat resistance and chemical resistance, and also high in ultraviolet absorption, so that it is suitable as a material for a sealed container. In addition, since the odor adsorbing property is low, there is no problem even if a cosmetic or the like containing a fragrance is applied as the content. Further, since both PET and PEN are polyester-based resins, there is no need to separate them when discarding. Therefore, if the configuration of this embodiment is adopted, the gas barrier property is sufficiently ensured on both the mount side and the transparent cover side. As a modified example, a material obtained by laminating a film of a PET resin and a film of a PEN resin may be used as a material of the transparent cover. In this case, the effect of the PEN resin can be sufficiently expected, and at the same time,
Since the lamination with the PET resin is low in cost, the cost can be suppressed as compared with the case where the lamination is made of the PEN resin as a whole.

[0017]

As described above, in the blister pack of the present invention, an N-fold expanded polyester sheet is used for the backing sheet, and a three-dimensionally molded A-PET cover is used for the transparent cover. And
It is convenient to discard the mount and the transparent cover as in the related art, without having to separate them. In addition, since the material is a polyester material, it can be reused, which can greatly contribute to the reduction of petroleum resources. Furthermore, since the polyester sheet used for the backing sheet is foamed, the surface is not smooth but has a mat shape suitable for printing, and can be directly printed, so that the manufacturing process can be shortened. . In the technique of setting the foaming ratio of the mount to 3 to 5 times, a surface structure suitable for printing can be obtained while having an appropriate tension, and the content is sufficiently held.

Furthermore, a laminate obtained by laminating a vapor-deposited film provided with a vapor-deposited layer of alumina or silicon dioxide on the surface of a PET resin as a backing sheet,
With the configuration in which the EN film is laminated, the gas barrier properties of the PET resin, which is insufficient by itself, can be improved, so that a versatile blister pack can be obtained. Further, when the PEN resin is used as a whole or as a laminate material for the transparent cover, the barrier property inherent to the PEN resin can be sufficiently exhibited, and it is possible to avoid adverse effects on the contents from the transparent cover side. Become.

[Brief description of the drawings]

FIG. 1 is a typical perspective view of a blister pack of the present invention.

[Explanation of symbols]

 1 Mount 2 Transparent cover 2a Flange

Claims (4)

[Claims] In a blister pack comprising a backing sheet and a transparent cover, an N-fold expanded polyester sheet is used for the backing sheet, and a three-dimensionally molded A-PET is used for the transparent cover.
A blister pack using a cover. 2. A blister pack comprising a backing sheet and a transparent cover, wherein the backing sheet uses an N-fold expanded polyester sheet and the transparent cover uses a three-dimensionally molded PEN cover. 3. A blister pack comprising a backing sheet and a transparent cover, wherein an N-fold expanded polyester sheet is used for the backing sheet, and a three-dimensionally molded A-PET is used for the transparent cover.
And a PEN laminate cover. 4. A PEN film or PET on the surface of an N-fold expanded polyester sheet as a backing sheet.
The blister pack according to claim 1 or 2, wherein a backing sheet is used which is formed by laminating a vapor-deposited film provided with a vapor-deposited layer of alumina or silicon dioxide on the film.