JPH0777885B2 - Presses, throughs, packages and receiver rolls for manufacturing them - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention stores a tablet or the like in a large number of storage pockets provided in a synthetic resin sheet, and then presses, throughs, or packages in which pocket openings are covered with aluminum foil. (P.
TP) and the receiving roll for manufacturing this.

<Prior Art> Currently, PTP is widely used for packaging tablets such as pharmaceuticals, a vinyl chloride sheet having a thickness of about 150 to 300 microns is used as a base material, and a thickness of about 17 to about 17 as a sealing material. twenty five
Micron aluminum foil is used.

After filling tablets or capsules into a large number of storage pockets formed on the vinyl chloride sheet, the sheet is run on the peripheral surface of the roll, and aluminum foil is laminated by thermocompression bonding to the sheet surface with a heat-sealing roll, The pocket opening is blocked.

<Problems to be solved by the invention> At the time of stacking by heat sealing, the difference in heat shrinkage between the aluminum foil and the synthetic resin sheet becomes a problem. Since the synthetic resin sheet and the synthetic resin sheet naturally have different heat shrinkage rates, the laminated body curls to the side with a higher shrinkage rate after heat sealing. This curl phenomenon is somewhat affected by the curved surface of the receiving roll at the time of heat sealing, but since the aluminum side is slightly stretched by the heat sealing roll, the difference in the heat shrinkage rate is a major cause. Such a curl not only has an unnatural appearance but also has an adverse effect such as hindering a smooth flow on the line in the automatic package. Therefore, conventionally, among synthetic resin materials, vinyl chloride having a heat shrinkage rate most similar to that of aluminum foil is selected and used within a range where at least physical conditions as PTP are provided.
However, since vinyl chloride is inferior in moisture resistance, it is not preferable for tablets that particularly require moisture resistance.
For moisture resistance, a polyolefin synthetic resin material such as polyethylene is preferable, but the heat shrinkage has a large gap with the aluminum foil, and the curl phenomenon described above appears remarkably and the appearance quality as a product cannot be obtained.

Therefore, the present invention suppresses the occurrence of the curling phenomenon to the same level as or lower than that of vinyl chloride while using a polyolefin synthetic resin having excellent moisture resistance and a large heat shrinkage rate as a sheet material. Can do
The main purpose is to provide a PTP and a receiving roll used in an apparatus for manufacturing the PTP.

<Means for Solving the Problem> In order to achieve the above-mentioned object, the PTP according to the present invention is a roll for receiving an aluminum foil on the sheet after filling a large number of storage pockets provided in the synthetic resin sheet with tablets. A PTP that closes the opening of the storage pocket by bonding by thermocompression bonding between the heat seal roll and
The synthetic resin sheet is formed of a polyolefin-based synthetic resin material having a thickness of 150 to 400 microns, and a joint portion by thermocompression bonding of an aluminum foil and a synthetic resin sheet has a thickness of 1.7 mm to 3 mm around the opening of the storage pocket. It is formed into a ring shape with a width.

Further, in the receiving roll for manufacturing the PTP, a ring-shaped convex receiving surface having a height of 10 to 80 microns and a width of 1.7 mm to 3 mm is provided in the periphery of the storage pocket fitting recess formed on the peripheral surface of the receiving roll. It was formed.

<Operation> In the present invention configured as described above, although polypropylene having a large heat shrinkage is used as the sheet material 1, it is strongly bonded to the aluminum foil by the ring-shaped bonding part 6, and other parts are bonded. Makes a pseudo seal with weak adhesion,
Or, since it hardly bonds, it is possible to hold down the heat shrinkage gap between the upper and lower parts of the joint,
As a result, it is possible to suppress the occurrence of curling phenomenon due to heat shrinkage after heat sealing to the same level as or less than that of vinyl chloride, and therefore, it is possible to use a highly moisture resistant polyolefin synthetic resin sheet that could not be used alone in the past. , It can be used as it is without being laminated with other synthetic resins, and PTP for tablets and capsules which require moisture resistance can be manufactured at low cost.

<Examples> Examples of the present invention will be described below with reference to the drawings.

In the present invention, a polyolefin synthetic resin such as polypropylene is used as the material of the synthetic resin sheet 1. The thickness of the sheet 1 is preferably 300 microns but is selected in the range 150 to 400 microns. Further, polypropylene is preferred as the polyolefin synthetic resin material.

Thus, the synthetic resin sheet 1 is formed of a long strip, and a large number of storage pockets 2 are stretched and formed in the sheet by vacuum forming or pressure forming means. Then, the storage pocket 2 is filled with tablets 3 such as chemicals, and then sequentially transferred between the heat-sealing roll 4 and the receiving roll 5 together with the aluminum foil 7 to be heat-sealed.

A diamond lattice pattern is formed on the peripheral surface of the heat seal roll 4 by a number of ridge lines 4a ... And 4b. Therefore, the portion pressed by the heat seal roll 4 is formed in a rhombic lattice pattern. The interval l between the ridgelines 4a ... And 4b ... Is 0.8 mm, but this dimension can be changed within the range of 0.6 to 1.0 mm.

The receiving roll 5 has a large number of concave portions 5a for receiving the storage pockets 2, and a ring-shaped convex receiving surface 5b having a height of 20 microns is formed around the concave portions 5a. The height of this ring-shaped convex receiving surface is selected, as will be described later, from 10 to 80 microns depending on the object to be packaged. The width (L) of the ring-shaped convex receiving surface 5b is a dimension including at least two intersection points P and P of diagonal portions of the rhombus formed by the ridgeline of the heat seal roll 4, that is, L ≧ 0.8. It is formed by mm × √2 × 2.

Therefore, the width (L) of the ring-shaped convex receiving surface is about 2.3 mm, which is the most preferable value.
It is allowed within the range of 1.7 mm to 3 mm.

Between the heat-sealing roll 4 and the receiving roll 5 formed as described above, the synthetic resin sheet 1 in which the pockets 2 are filled with tablets and the aluminum foil 7 coated with the adhesive on the joint surface are fed and heated at an appropriate temperature. Crimp. As a result, the synthetic resin sheet 1 and the aluminum foil 7 are strongly pressure-bonded to each other by the ring-shaped convex receiving surface 5b formed on the peripheral surface of the concave portion 5a. At this time, since the height of the convex receiving surface 5b of the receiving roll 5 is as low as 20 μm in the above embodiment, as shown in FIG. 7, the portion other than the ring-shaped joint 6 is also heat-sealed. Roll 4
Is lightly touched, and the parts other than the ring-shaped joint 6 are pseudo-sealed with a weak adhesive force.

The degree of this pseudo seal is influenced by the height of the convex receiving surface 5b of the heat seal roll 5, and accordingly, the convex receiving surface
If the height of 5a is increased to, for example, 80 microns, the pseudo seal portion is almost eliminated, and only the ring-shaped joint portion 6 is strongly and strongly pressure-bonded.

The heat-sealed strip is cut into an appropriate size, for example, a PTP of a unit unit containing two rows of storage pockets as shown in FIG. At this time, although polypropylene having a large heat shrinkage is used as a sheet material, it is strongly bonded to the aluminum foil at the ring-shaped bonding portion 6 and the other portions are not bonded or have a weak bonding force. Since it is pseudo-sealed, the heat shrinkage gap between the upper and lower sheets can be suppressed to a small extent, and thus the occurrence of the curl phenomenon can be suppressed to a level equal to or less than that of vinyl chloride.

The following table shows the curl phenomenon due to heat shrinkage after heat sealing, which is measured by the inventor every time. In the table, II is the PTP of the unit unit according to the present invention, I is the one made of the same material as the present invention and heat-sealed on the whole surface, and III is the PTP using the conventional vinyl chloride sheet. Is. The numerical values in the table show the curl degree X in FIG. 2, and the unit is mm.

From the above table, it can be seen that the PTP according to the present invention has a curl phenomenon that occurs after heat-sealing, which is equal to or less than that using the conventional vinyl chloride sheet.

Further, in the present invention, as shown in FIG. 5, a connecting portion 8 having a width similar to that of the ring-shaped connecting portion 6 may be formed in the peripheral portion of the PTP cut into the unit units. Good. This can prevent the peripheral edge of the aluminum foil from peeling off.

<Effects of the Invention> As described in detail above, the present invention uses polypropylene having a large heat shrinkage rate as a sheet material,
It is strongly bonded to the aluminum foil with the ring-shaped bonding part 6,
Since the other parts are hardly bonded or are pseudo-sealed with weak adhesive force, it is possible to suppress the heat shrinkage gap between the upper and lower parts of the bonded part, which results in heat shrinkage after heat sealing. It is possible to suppress the occurrence of curling phenomenon due to the same as or less than the case of vinyl chloride, and therefore a highly moisture-proof polyolefin resin sheet that could not be used alone in the past,
It can be used as it is without being laminated with other synthetic resin, and it is possible to manufacture PTP at low cost especially for tablets that require moisture resistance, and the storage pocket has its opening. Since it is strongly joined in a ring shape with a width of about 1.7 to 3 mm at the periphery, the inside of the storage pocket is completely sealed and at the same time the synthetic resin sheet and the aluminum foil can be securely joined with the required binding force. There are effects such as being able to.

In addition, since the ring-shaped convex receiving surface having a height of 10 to 80 microns and a width of 1.7 mm to 3 mm is formed around the pocket fitting concave portion of the receiving roller according to the present invention, the height of the ring-shaped convex receiving surface is increased. By changing the height within the set range, for example, by lowering the height, the heat-sealing roll lightly touches the portion other than the ring-shaped joint to pseudo-seal with a weak adhesive force, or conversely. By increasing the height, it is possible to obtain the PTP according to the intended object such that the pseudo seal portion is almost eliminated and only the ring-shaped joint can be firmly and firmly adhered.

[Brief description of drawings]

FIG. 1 is a plan view of a PTP according to the present invention, FIG. 2 is its enlarged sectional view, FIG. 3 is a sectional view showing a heat-sealing process, FIG. 4 is its enlarged sectional view, and FIG. FIG. 6 is a plan view showing another embodiment of such PTP, FIG. 6 is a partially enlarged plan view showing the peripheral surface of the heat seal roll, FIG. 7 is an enlarged sectional view showing the time of heat sealing, and FIG. 8 is a part of the receiving roll. It is an expanded sectional view. 1 is a synthetic resin sheet, 2 is a storage pocket, 3 is a tablet, 4 is a heat seal roll, 5 is a receiving roll,
5a is a concave portion, 5b is a convex receiving surface, 6 is a ring-shaped connecting portion, and 7 is an aluminum foil.

Claims (3)

[Claims] 1. A storage pocket formed by filling tablets into a large number of storage pockets provided on a synthetic resin sheet, and then thermocompression bonding between an aluminum foil receiving roll and a heat-sealing roll on the sheet. Which is a press, a through, or a package in which an opening of the synthetic resin sheet is closed, the synthetic resin sheet is formed of a polyolefin-based synthetic resin material having a thickness of 150 to 400 μm, and the joining portion is formed by thermocompression bonding of an aluminum foil and the synthetic resin sheet. Around the opening of the storage pocket.
Characterized by being formed in a ring shape with a width of 7 mm to 3 mm,
Press, thru, package. 2. The press, through, package according to claim 1, wherein the contact surface between the synthetic resin sheet and the aluminum foil other than the joint portion around the opening of the pocket is pseudo-sealed with a weak adhesive force. 3. A height of 10 to 80 μm and a width of 1. at the periphery of a recess for receiving a storage pocket formed on the peripheral surface of the receiving roll.
A receiving roll for manufacturing a press, a through, or a package according to claim 1, wherein a ring-shaped convex receiving surface of 7 mm to 3 mm is formed.