JP2959724B2 - Cover material for press-through pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a cover material for a press-through pack, which is a container for individually storing contents such as pharmaceuticals.

[Prior art]

2. Description of the Related Art Conventionally, a press-through pack has been known which includes a container body made of a synthetic resin such as polyvinyl chloride or polypropylene, and a lid made of aluminum foil for sealing an opening of the container body. The container main body has many pockets, and tablets such as medicines are stored in the pockets. When removing the tablet, the pocket is pressed from the outside, and the pressing force causes the lid to burst. Conventionally, as this lid material, the symbol HX in JIS H 0001
A so-called hard aluminum foil having a hardness not less than the hardness defined in 8 is used. This hard aluminum foil has high breaking strength and low elongation, and is suitably used as a cover material of a press-through pack. Here, the reason why the breaking strength is high is to prevent the lid material from breaking during manufacturing or transportation of the press-through pack. The low elongation is used so that the lid material is easily ruptured when taking out the tablet stored in the container body. However, this lid material had the following disadvantages. That is, the press-through pack is manufactured by laminating the container body and the hard aluminum foil, heat sealing at a temperature of about 200 ° C. and a time of about 0.1 second, and then cooling. At the time of this production, there was a disadvantage that the press-through pack was warped toward the container body. This is because the thermal shrinkage of the lid is smaller than the thermal shrinkage of the container body, and the load applied to the lid is deformed by the lid itself and cannot be absorbed. That is, the hard aluminum foil has a large deformation load. When the press-through pack is warped, there are disadvantages in that it is difficult to pack and pack and to store the press-through pack. For this reason, if a so-called soft aluminum foil having a hardness defined by the symbol O in JIS H 0001 is used as the lid, the deformation load is small, so that the load applied to the lid is absorbed. Thus, the disadvantage that the press-through pack warps toward the container body can be avoided. However, since the soft aluminum foil has a high elongation, when the tablet stored in the container body is taken out, the lid material may only extend without bursting.

[Problems to be solved by the invention]

Therefore, the present invention prevents the drawback that the press-through pack is warped to the container body side by bonding two aluminum foils having different hardnesses to form a cover material of the press-through pack, This makes it easier to take out the tablets stored in the storage device.

[Means for Solving the Problems]

That is, in the present invention, the symbols O to
Soft aluminum foil with hardness defined by HX4 and JIS H
The present invention relates to a cover material for a press-through pack, wherein a hard aluminum box having a hardness not less than the hardness defined by the symbol HX8 in 0001 is bonded with an adhesive. The soft aluminum foil used in the present invention has a hardness defined by symbols O to HX4 in JIS H0001. That is, it has a hardness ranging from the symbol O to HX4. Specifically, an aluminum foil having a hardness of O, HX1, HX2, HX3, HX4 is used. Here, the symbol O means that the aluminum foil was annealed to obtain the softest state. The symbol XH4 has a tensile strength between the symbols O and HX8. The symbol H
X1 has a tensile strength intermediate between the symbol O and the symbol HX2, a symbol HX2 has a tensile strength intermediate between the symbol O and the symbol HX4, and a symbol HX3 has a tensile strength equal to the symbol HX2. Symbol HX
It is in the middle of 4. The hard aluminum foil used in the present invention has a hardness higher than the hardness defined by the symbol HX8 in JIS H0001. Here, the symbol HX8 means that the cross-sectional reduction rate is almost 7
It refers to those with tensile strength obtained when cold-worked to 5%. In the present invention, a material having a hardness equal to or higher than that of the symbol HX8 is used as the hard aluminum foil. In the present invention, the above-mentioned soft aluminum foil and hard aluminum foil are bonded with an adhesive. As the adhesive, conventionally known various adhesives can be employed, but it is particularly preferable to use a solution-type urethane-based adhesive for dry lamination. In addition, the aluminum foil generally has a glossy surface on one side and a disappearing surface on the other side. This is because when the aluminum foil is cold-rolled, since the two rolls are cold-rolled, the surface in contact with the rolling roll becomes a glossy surface, and the surface in contact with another aluminum foil becomes a vanishing surface. Also in the case of the soft aluminum foil and the hard aluminum foil used in the present invention, one side is often glossy and the other side is erased. By the way, when aluminum foil is used as the lid material of the press-through pack, it is preferable that both sides are erased. This is to prevent the eyes of the inspector from becoming tired when visually inspecting the identification symbol, the quality number, and the like printed on the lid material. Therefore, also in the present invention, when bonding the soft aluminum foil and the hard aluminum foil, it is preferable to bond the two aluminum foils with an adhesive such that the glossy surfaces of the two aluminum foils face each other. When the glossy surfaces are adhered to each other with an adhesive, both surfaces of the obtained lid material are erased. Therefore, a lid material that makes it hard for the eyes of the inspector or the like to be tired can be obtained and can be suitably used. As described above, the cover material of the press-through pack in which the soft aluminum foil and the hard aluminum foil are bonded to each other may be used so that any surface is on the container body side. It is preferable to use it so as to be on the container body side.

【Example】

Using the soft aluminum foil and / or hard aluminum foil shown in FIG. 1 and a solution urethane-based dry laminating adhesive, a cover material for a press-through pack was obtained. The physical properties of this lid material were as shown in Table 1. As is clear from this result, the lid material according to the example is
The 0.2% deformation load was small and the elongation was low.
On the other hand, the lid made of only HX8 aluminum foil is
The deformation load was large by 0.2%, and warpage was observed on the container body side during the production of the press-through pack. In addition, O aluminum foil The lid material made of only high elongation, and when made into a press-through pack, the lid material was not easily ruptured when taking out the tablet. Furthermore, those obtained by bonding aluminum foils of HX8 to each other, and those obtained by bonding aluminum foils of O
% Deformation load was large and elongation was high, and it was unsuitable as a cover material of a press-through pack.

[Action and effect of the invention]

The cover material for a press-through pack according to the present invention has a small 0.2% deformation load and a low elongation because the soft aluminum foil and the hard aluminum foil are bonded with an adhesive. Therefore, when manufacturing a press-through pack, even if an external force is applied to the lid member due to a difference in thermal shrinkage between the container body and the lid member, the external force is absorbed by deformation of the soft aluminum foil itself. Therefore, the press-through pack can be prevented from warping to the container body side, and the press-through pack can be easily packaged in a box, and can be easily stored. In addition, when taking out the tablets stored in the pockets of the container body, the pressing force applied to the pockets first causes the hard aluminum foil to burst, and the pressing force concentrates on the soft aluminum foil with the rupture. The foil also bursts. Therefore, the tablet is easily taken out by breaking the lid from the container body. Furthermore, as is clear from the examples, the lid material according to the present invention has almost no pinholes because two aluminum foils are bonded to each other. That is, although there is a pinhole in each aluminum foil, when two of them are overlapped, the probability that the pinholes overlap is almost zero. Therefore,
The use of the lid material according to the present invention has a particularly remarkable effect that moisture and bacteria can be prevented from entering the tablet. Further, even if a certain number of pinholes are generated by making each aluminum foil thinner, the obtained cover material has almost no pinholes, so that the cover material itself can be made thinner. Furthermore, if the soft aluminum foil and the hard aluminum foil are bonded so that the erased surface becomes the outer surface, that is, if the soft aluminum foil and the hard aluminum foil are bonded such that the glossy surfaces thereof face each other, the lid material surface Even if the identification symbols, quality symbols, and the like printed on the surface are visually inspected, the eyes are hardly tired.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 60-156152 (JP, U) JP-A 63-194719 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B32B 15/08 B65D 81/24

Claims (2)

(57) [Claims] A soft aluminum foil having a hardness defined by symbols O to HX4 in JIS H 0001, and JIS H 0001
And a hard aluminum foil having a hardness not less than the hardness defined by the symbol HX8. 2. The press-through pack according to claim 1, wherein the glossy surfaces of the soft aluminum foil and the hard aluminum foil, one surface of which is glossy and the other surface of which are erased, are bonded with an adhesive. Cover material.