JP2525649Y2 - Sheet for PTP packaging - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet for PTP packaging, and more particularly to a sheet for PTP packaging of vinyl chloride.

[0002]

2. Description of the Related Art PTP (Press Through Pack) packaging
In recent years, for example, tablets and capsules have become widespread because they have better openability than conventional strip packaging and the like, use less packaging material per packaged object, and do not require a storage space. . In the PTP packaging, a predetermined concave portion corresponding to an article to be packaged is formed in a sheet, and after filling the concave section with the article, the sheet and an aluminum foil are bonded and packaged. As a sheet for PTP packaging, a rigid vinyl chloride resin sheet has been used in terms of transparency, workability, and formability.

[0003]

However, the hard vinyl chloride resin sheet used as a conventional PTP packaging sheet generates chlorine gas and the like when incinerated after use, and therefore is not used from the viewpoint of environmental protection. There is a tendency.
Therefore, a polypropylene (PP) resin sheet has come to be used in place of the rigid vinyl chloride resin sheet. However, there has been a problem that curling is likely to occur in a state where the PP resin sheet is bonded to the aluminum foil due to thermal shrinkage, transparency is low, a molding temperature range is narrow, and moldability is poor.

When an amorphous polyethylene terephthalate (APET) resin sheet is used in place of the rigid vinyl chloride resin sheet, transparency, moldability, and curl prevention are excellent, but when a concave portion is formed in the sheet. However, there was a problem that the removability from the molding die was poor, and the workability was poor due to the elongation or cracking of the sheet. That is, as shown in FIG. 5, after forming a recess 53 in the APET resin sheet 51 using a molding die 52 including a lower die 52a and an upper die 52b, the lower die 52a and the upper die 52b When the APET resin sheet 51 is vertically separated, the APET resin sheet 51 is not easily separated from the lower mold 52a, and in particular, the tension in the direction of the arrow in FIG. In addition to the APET resin sheet 51, elongation or cracking of the sheet occurs.

[0005] The present invention has been made in view of such circumstances, and provides a sheet for PTP packaging that is excellent in transparency, workability, and moldability, and that does not easily curl when bonded to an aluminum foil. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a PTP for forming a predetermined recess and bonding the sheet filled with an article and an aluminum foil to the recess to package the article. In the sheet used for packaging, the sheet was configured to be a laminate sheet including an amorphous polyethylene terephthalate film and a non-stretched polypropylene film bonded to at least one surface of the amorphous polyethylene terephthalate film.

[0007]

An amorphous polyethylene terephthalate film and a laminate sheet formed by laminating an unstretched polypropylene film on at least one surface of the amorphous polyethylene terephthalate film have good transparency and a predetermined concave portion. It has good releasability from the molding die when molding, and has a wide molding temperature range and excellent moldability. Furthermore, PTP packaging performed by bonding this sheet and aluminum foil is facilitated, and curling after packaging is prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a cross-sectional shape of a PTP packaging using the PTP packaging sheet of the present invention. In FIG. 1, a sheet 1 of the present invention is a laminated sheet obtained by laminating an amorphous polyethylene terephthalate (APET) film 2 and an unstretched polypropylene (CPP) film 3.
The concave portion 5 is formed with the film 3 side as a molding inner surface (the surface on which the article to be packaged 7 described later is filled). The packaged article 7 such as a tablet is bonded to the aluminum foil 6 in a state of being filled in the recess 5.

In order to form the concave portion 5 in the laminate sheet 1 with the CPP film 3 side as the molding inner surface in this manner, for example, as shown in FIG. May be supplied to the molding die 42. That is, by positioning the CPP film 3 having good releasability from the molding die on the lower surface of the laminate sheet 1, the lower die 42a is formed after the concave portion 5 is formed.
When the upper mold 42b and the upper mold 42b are vertically separated from each other, the lamination sheet 1 and the lower mold 42a are favorably separated from each other.

FIG. 3 is a schematic sectional view showing a sectional shape of a PTP package using another PTP packaging sheet of the present invention. In FIG. 3, a sheet 11 of the present invention is a laminated sheet in which an APET film 12 and a CPP film 13 are laminated.
A concave portion 15 is formed with the film 12 side as a molding inner surface. Then, the packaged article 7 is bonded to the aluminum foil 6 in a state of being filled in the concave portion 15.

In order to form the recess 15 in the laminate sheet 11 with the APET film 12 side as the molding inner surface in this manner, for example, a molding apparatus as shown in FIG. What is necessary is just to supply the laminated sheet 11. That is, by positioning the CPP film 13 having good releasability from the molding die on the lower surface of the laminate sheet 11, when the lower mold 52a and the upper mold 52b are vertically separated after the recess 15 is formed, the laminate sheet 11 and the lower mold 52a are satisfactorily separated.

FIG. 4 is a schematic cross-sectional view showing a cross-sectional shape of a PTP package using another PTP packaging sheet of the present invention. In FIG. 4, the sheet 21 of the present invention is APE.
A laminate sheet in which the T film 22 is laminated so as to be sandwiched between the CPP film 23 and the CPP film 24,
The laminate sheet 21 has a concave portion 25 with the CPP film 24 side as a molding inner surface. Then, the article to be packaged 7 is bonded to the aluminum foil 6 in a state of being filled in the recess 25.

The formation of the concave portion 25 in the laminate sheet 21 can be suitably performed using either the molding apparatus shown in FIG. 2 or the molding apparatus shown in FIG. Also, in the sheet for PTP packaging of the present invention, APE
Focusing on the difference in the heat shrinkage between the T film and the CPP film, that is, the heat shrinkage of the CPP film is larger than the heat shrinkage of the APET film, and as shown in FIG. By providing the laminate sheet on the surface to be bonded to the aluminum foil, it is possible to more effectively prevent the occurrence of curl after bonding the laminate sheet and the aluminum foil.

FIGS. 2 and 5 show a plate forming apparatus which is a part of the intermittent feed type PTP packaging apparatus. However, the use of the sheet of the present invention is not limited to such an intermittent feed type PTP packaging apparatus. However, it is needless to say that the present invention can be applied to a PTP packaging apparatus of a continuous molding system using a molding drum. In this case, it is preferable that a CPP film is provided on a surface of the sheet that comes into contact with the forming drum.

As the APET film constituting the sheet for PTP packaging of the present invention, for example, Crystal Ray manufactured by Idemitsu Petrochemical Co., Ltd. can be used, and the thickness is 150 to 150 mm.
It is preferably about 250 μm. Further, the thickness of the CPP film is preferably about 20 to 50 μm. The total thickness of the PTP packaging sheet is preferably about 150 to 330 μm. If the thickness of the sheet is less than 150 μm, the pressure resistance (buckling strength) of the molded portion becomes weak, which is not preferable.
If it exceeds 0 μm, the pressure resistance becomes too high, and it becomes difficult to take out the contents.

The bonding of the APET film and the CPP film can be performed according to a known method such as a dry laminating method, a non-sol laminating method, and an extrusion laminating method (so-called sand laminating method). In this case, the thickness of the adhesive layer is preferably about 1 to 10 μm in the dry laminating method and the non-sol laminating method,
In the Sandrami method, the thickness is preferably about 10 to 40 μm.

The aluminum foil to be bonded to the PTP packaging sheet of the present invention as described above may be a normal aluminum foil used for PTP packaging. Further, an adhesive layer such as a heat seal lacquer or a polypropylene resin may be formed on the surface to be bonded to the aluminum foil sheet, and a water and heat resistant agent may be applied on the back surface of the aluminum foil.

Next, the present invention will be described in more detail with reference to experimental examples. (Experimental Example) A laminate sheet having a configuration as shown in FIG. 1 was formed by using Idemitsu Petrochemical Co., Ltd. Crystal Ray as an APET film and Toray 3301 type as a CPP film, followed by PTP packaging. Samples (Samples 1-4)
It was created. Similarly, a laminate sheet having a configuration as shown in FIG. 3 is formed, PTP packaging is performed to prepare samples (samples 5 to 8), and a laminate sheet having a configuration as shown in FIG. 4 is formed. And PTP packaging to prepare samples (samples 9 to 10). APET used for each sample
The film and CPP film thicknesses were as shown in Table 1 below. The PTP packaging conditions were as follows.

PTP packaging conditions-Molding machine: FKD-V3 manufactured by CKD-Mold: No. 3 capsule-Molding method: Plug assist + compressed air (flat plate block heating)-Molding speed: 100 shots (2000 tablets / min.
4.9 M / min) Further, as a comparison, an APET film having a thickness of 250 μm,
Similarly, using a CPP film having a thickness of 250 μm,
Samples (Comparative Samples 1 and 2) were prepared by TP packaging.
In addition, the concave portion molding is performed so that the molding inner surface of the samples 1 to 4 is in contact with the lower mold as shown in FIG. 2, and the samples 5 to 10 and the comparative samples 1 and 2 are shown in FIG. In such a manner that the inner surface of the molding comes into contact with the upper mold.

The prepared samples 1 to 10 and comparative sample 1,
2 was evaluated for moldability and appearance. Table 1 shows the evaluation results.

[0021]

[Table 1]

[0022]

As described in detail above, according to the present invention, a laminate composed of an amorphous polyethylene terephthalate film and a non-stretched polypropylene film bonded to at least one surface of the amorphous polyethylene terephthalate film. The sheet has good transparency and good releasability from the molding die when forming a predetermined recess, and has a wide molding temperature range and excellent moldability. PTP packaging performed together is facilitated, and curling after packaging is prevented.

[Brief description of the drawings]

FIG. 1 shows a PTP using the PTP packaging sheet of the present invention.
It is an outline sectional view showing the section shape of packing.

FIG. 2 is a schematic cross-sectional view showing a state in which a concave portion is formed in the PTP packaging sheet of the present invention.

FIG. 3 shows a P using another sheet for PTP packaging of the present invention.
It is an outline sectional view showing the section shape of TP packing.

FIG. 4 shows a P using another sheet for PTP packaging of the present invention.
It is an outline sectional view showing the section shape of TP packing.

FIG. 5 is a schematic sectional view showing a state in which a concave portion is formed in a conventional PTP packaging sheet.

[Explanation of symbols]

1,11,21 ... PTP packaging sheet 2,12,22 ... Amorphous polyethylene terephthalate (APET) film 3,13,23,24 ... Unstretched polypropylene (CP
P) Film 5, 15, 25 ... recess 6 ... aluminum foil 7 ... article to be packaged

Continued on the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B32B 27/32 102 B32B 27/32 102 27/36 27/36 B65D 75/34 B65D 75/34

Claims (4)

(57) [Scope of request for utility model registration] 1. A sheet used for PTP packaging in which a predetermined concave part is formed and a sheet filled with an article in the concave part and an aluminum foil are bonded together to package the article, wherein the sheet is an amorphous polyethylene terephthalate film;
A sheet for PTP packaging, which is a laminate sheet comprising an amorphous polyethylene terephthalate film and an unstretched polypropylene film bonded to at least one surface of the film. 2. The unstretched polypropylene film,
The sheet for PTP packaging according to claim 1, wherein the sheet is provided on at least a surface of the laminate sheet to be bonded to the aluminum foil. 3. The PTP packaging sheet according to claim 1, wherein the amorphous polyethylene terephthalate film has a thickness of 150 to 250 μm. 4. The unstretched polypropylene film,
The thickness is 20 to 50 µm.
4. The sheet for PTP packaging according to any one of claims 1 to 3.