JP4899915B2 - Strip packaging - Google Patents

Description

  The present invention relates to a strip package, and more specifically, in a strip package in which tablets such as pharmaceuticals are individually packaged in a continuous form with a laminated film, etc., and can be easily opened when the contents are taken out. The present invention relates to a strip package that prevents the contents from popping out.

Conventionally, the packaging form called strip packaging or PTP (press through pack) has been mainly used for individual packaging of tablets and capsules such as pharmaceuticals.
The PTP uses a relatively thick plastic sheet as a material on the pocket molding side for storing tablets and the like, and uses a thin laminated material mainly made of aluminum foil as a lid for sealing the pocket opening. Therefore, the packaging body is rigid and excellent in the protection of the contents such as tablets, and when taking out the contents, the contents can be easily pierced with the contents by pushing from the pocket side to the lid side. Can be taken out.
However, in order to improve the productivity of PTP-type packaging, usually, a packaging machine that performs inline forming of pockets on sheets, filling of contents, sealing of lids, etc. is used. There is a problem that the machine becomes expensive and the packaging cost including the packaging material cost becomes high.

  On the other hand, the strip packaging has the merit that the packaging material is only a laminated film and the pocket is not formed, so that the packaging machine is inexpensive, the packaging material cost is relatively low, and the packaging cost can be reduced. However, as for the strip package, as a method of opening when taking out the contents, for example, a notch, a fine scar group, or a jagged cut end is provided at the outer end of the surrounding heat seal part, and a laminated film is formed therefrom. The method of tearing and opening was adopted. In this case, the opening itself is relatively easy, but since the opening is large and the tearing position is difficult to stabilize, there is a problem that the contents such as tablets pop out and become dirty or lost.

As a method for solving such a problem, a film for strip packaging has been proposed in which the contents can be easily removed by extruding the contents from the outside of the packaging film with a fingertip, instead of tearing the film. ing.
As such a film for strip packaging, specifically, “a sealant layer having a thickness of 10 to 30 μm on a polyterephthalate ethylene film or a polypropylene film having a thickness of 10 to 30 μm in which a large number of fine holes are formed on the entire surface” The hole is formed in a reverse cone or inverted pyramid shape, or an inverted truncated cone shape or an inverted truncated pyramid shape toward the sealant layer, and is 15 μmφ or less on the lamination surface with the sealant layer. There is a film for strip packaging characterized by having a diameter and 400 to 3000 holes per 1 cm ² (see Patent Document 1).

However, the film for strip packaging described in Patent Document 1 has a large number of holes as described above on the entire surface of the film excluding the sealant layer as described above, so when taking out contents such as tablets. Although it is easy to break through the film, there has been a problem that the moisture resistance of the package is greatly reduced.
Registered Utility Model No. 3035529 (pages 2 to 5)

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof is to provide the contents in a strip package in which tablets such as pharmaceuticals are individually packaged in a continuous form with a laminated film. An object of the present invention is to provide a strip package that provides easy-openability by breakage similar to PTP packaging at the time of taking out, and at the same time, prevents the contents from popping out at the time of opening and also prevents damage during transportation.

The above problems can be solved by the following present invention.
That is, the invention described in claim 1 is a strip package in which both sides of contents such as tablets are sandwiched between laminated films and the contents are heat sealed and individually packaged in a continuous packaging form. After the base film and the aluminum foil are bonded together by an extrusion laminating method or a dry laminating method, a polyethylene resin layer of a sealant layer is laminated on the aluminum foil surface via an anchor coating layer by an extrusion coating method or an extrusion laminating method. The thickness of the aluminum foil is in the range of 7 to 20 μm, the thickness of the polyethylene resin layer is in the range of 5 to 50 μm, and on the outer surface of the laminated film on one side of each individual package, From the same length as the maximum diameter of the contents at a position that overlaps with the enclosed contents and excluding the surrounding heat seal part At least one half-cut wire having a length of 3.5 times is provided, and the breaking strength when the content is taken out by breaking through the half-cut wire portion is in the range of 13.0 to 30.0 N. It consists of a strip package.
In the present invention, the puncture strength is measured by the method shown in FIG. 5 using the compression test mode of the Tensilon tester. Details of the measurement method are described in paragraphs [0025] and [ [0026] as described in FIG.

  The invention described in claim 2 comprises the strip package according to claim 1, wherein the half-cut line is provided at a depth that penetrates at least the base film and does not cut the aluminum foil.

  The invention described in claim 3 is characterized in that the anchor coat layer provided when the polyethylene resin of the sealant layer is laminated on the aluminum foil surface is formed of a polyethylene imine anchor coat agent. Or it consists of the strip packaging body of 2.

According to the invention described in claim 1, since the strip package is configured as described above, the following effects can be obtained.
(1) Since the laminated film of the package has a structure in which a base film, an aluminum foil, and a polyethylene resin layer of a sealant layer are laminated in order from the outside, various mechanical strengths and printability required by the base film are obtained. The intermediate layer of aluminum foil provides excellent gas barrier properties, moisture proofing, and light shielding properties to enhance the shelf life of the contents, and the polyethylene resin layer of the sealant layer provides excellent heat sealability. Thus, a strip package excellent in these performances can be obtained.
(2) Since the thickness of the aluminum foil of the laminated film is in the range of 7 to 20 μm and the thickness of the polyethylene-based resin layer is in the range of 5 to 50 μm, packaging can be performed by appropriately selecting a combination of both thicknesses. A strip package that balances the ease of opening when removing the contents by breaking through the body, the effect of preventing the contents from popping out at the time of opening, and the strength to prevent damage to the package during transportation, etc. can do.
(3) Further, on the outer surface of the laminated film on one side of each individual wrapping, from the same length as the maximum diameter of the contents at a position overlapping with the enclosed contents and at a position excluding the surrounding heat seal portion. Since at least one half-cut line having a length of 5 times is provided, and the break-through strength at the time of taking out the contents by breaking through the half-cut line portion is in the range of 13.0 to 30.0N, When taking out the contents enclosed in the package body, by pushing the contents from the back side toward the half-cut line part, the half-cut line part can be opened more easily with a stable force. Moreover, it can be set as the strip package of the favorable and stable performance also about the prevention effect of the pop-out of the content at the time of opening, and the damage prevention effect of the package at the time of transportation.

  According to the invention described in claim 2, in the configuration of the strip package of the invention described in claim 1, the half-cut line is provided at a depth that penetrates at least the base film and does not cut the aluminum foil. Since it is configured, in addition to the function and effect of the invention described in claim 1, it is easy to open when the enclosed contents are taken through the package while maintaining excellent barrier properties by the aluminum foil. Can be obtained more reliably.

  According to the invention described in claim 3, in the structure of the strip package of the invention described in claim 1 or 2, the anchor coat layer provided when the polyethylene resin layer of the sealant layer is laminated on the aluminum foil surface is provided. In addition to the function and effect of the invention described in claim 1 or 2, the laminate strength when the polyethylene resin layer is laminated on the aluminum foil is increased. A moderate laminate strength can be achieved without being too weak and too weak. For this reason, when the contents enclosed in the package are taken out, if the contents are pushed through the half-cut line portion, peeling of the polyethylene-based resin layer (delamination) occurs along the broken end of the laminated film However, the polyethylene-based resin layer is stretched and broken at that portion, and irregularly broken ends are formed. This acts to prevent the contents from popping out, and the effect of preventing the contents from popping out at the time of opening is further ensured. Will be obtained.

In the strip package of the present invention, for example, a laminated film having a structure as shown in FIG. 1 is arranged on both sides of a content such as a tablet so that the polyethylene resin layers face each other, and both are placed around the content. It can be manufactured by heat sealing.
That is, FIG. 1 is a schematic cross-sectional view showing the configuration of the laminated film used in the strip package of the present invention. The laminated film 10 shown in FIG. The material film 1, the adhesive layer 2, the aluminum foil 3, the anchor coat layer 4, and the polyethylene-based resin layer 5 are laminated in order, and the half-cut wire 6 is provided on the outer surface side of the laminated film 10. The aluminum foil is provided at a depth that does not cut through the base film 1 at least.

  Examples of the base film 1 include biaxially stretched polyester films such as biaxially stretched polyethylene terephthalate film and biaxially stretched polyethylene naphthalate film, biaxially stretched polypropylene film, biaxially stretched nylon film, moisture-proof cellophane, paper, Synthetic paper or the like can be used.

The adhesive layer 2 differs depending on the method of laminating the base film 1 and the aluminum foil 3, and when laminating both by an extrusion laminating method (so-called sandwich laminating method), a polyolefin-based thermoadhesive resin, for example, An ethylene-methacrylic acid copolymer, an ethylene-acrylic acid copolymer, an ionomer, low-density polyethylene or the like, or a resin obtained by blending them with an adhesion improver such as a hard resin can be used. In this case, although not shown in the drawing, an anchor coat layer may be further provided on the bonding surface of the base film 1. Although this anchor coat layer is not particularly limited, it is provided to further improve the adhesion between the base film 1 and the adhesive layer 2, and for example, an isocyanate anchor coating agent can be suitably used. .
Further, the base film 1 and the aluminum foil 3 may be bonded together by a dry laminating method. In that case, for example, a two-component curable polyurethane adhesive for dry laminating may be used as the adhesive layer 2. it can.

The aluminum foil 3 has a thickness in the range of 7 to 20 μm. When taking out the contents such as tablets, the thickness is 12 to 20 μm in order to prevent the contents from popping out more reliably. It is more preferred to use a range of aluminum foil.
When the thickness of the aluminum foil is less than 7 μm, the openability when opening the package is good, but pinholes are likely to occur and the barrier properties are lowered, and the content can be prevented from popping out when the package is opened. This is not preferable because it is difficult to obtain, and damage such as cracks is likely to occur in the aluminum foil when the package is transported. Further, when the thickness of the aluminum foil exceeds 20 μm, the barrier property and the effect of preventing the contents from popping out can be sufficiently obtained, but this is not preferable because the unsealing property of the package is lowered and the packaging material cost is increased.

The anchor coat layer 4 is formed by applying an anchor coat agent to the surface of the aluminum foil 3 and drying by heating. The anchor coat agent (hereinafter referred to as AC agent) used for the anchor coat layer 4 is formed. ) Is basically not particularly limited. In addition to known organic titanium-based AC agents, polyethyleneimine-based AC agents, isocyanate-based AC agents (urethane-based), polybutadiene-based AC agents, polyolefin copolymers in water Any of dispersed aqueous polyolefin copolymer AC agents can be used.
で は In the laminated film 10 used in the strip package of the present invention, the laminate strength of the polyethylene resin layer 5 laminated on the surface of the anchor coat layer 4 is not too strong and not too weak as described above. The strength is more preferable, and for that purpose, it is more preferable to use a polyethyleneimine-based AC agent.

The polyethylene-based resin layer 5 is a sealant layer, and the surface of the anchor coat layer 4 is extrusion-coated with a polyethylene-based resin or a polyethylene-based resin film is extruded and laminated using a similar polyethylene-based resin. Can be formed by a method.
Examples of the resin used for the polyethylene-based resin layer 5 include, for example, high-pressure low-density polyethylene, linear low-density polyethylene, an ethylene-α / olefin copolymer polymerized using a single-site catalyst, An ethylene-methacrylic acid copolymer, an ethylene-acrylic acid copolymer, an ionomer, or the like can be preferably used.
The thickness of the polyethylene resin layer 5 is preferably in the range of 5 to 50 μm, more preferably in the range of 20 to 40 μm. When the thickness of the polyethylene resin layer is less than 5 μm, the heat seal strength is somewhat weak and unstable, which is not preferable. In addition, when the thickness of the polyethylene resin layer exceeds 50 μm, sufficient heat seal strength is obtained, and the effect of preventing the contents from popping out at the time of opening the package is improved, but the piercing strength at the time of opening the package is increased. Unsatisfactory opening performance.

  Further, in the present invention, the balance between the ease of opening when the strip package is opened, the effect of preventing the contents from popping out at the time of opening, and the strength of preventing the package from being damaged during transportation, etc. are balanced. The thickness of the aluminum foil 3 and the polyethylene-based resin layer 5 of the laminated film 10 is particularly important for combining with the package, for example, the thickness of the aluminum foil is 7 to 9 μm in the above range. In the case of being thin, it is preferable that the thickness of the polyethylene-based resin layer is preferably as large as 20 to 50 μm in the above range, and when the thickness of the aluminum foil is relatively thick as 12 to 20 μm, the polyethylene-based resin is preferred. It is preferable to make the layer thickness as thin as 5 to 40 μm.

  The half-cut line 6 is at least deep enough to penetrate the base film 1 and is provided so as not to cut the aluminum foil 3. Such a half-cut line 6 can be provided not only by a laser beam irradiation method but also by a mechanical method using a blade. Which method is adopted may be a suitable method depending on the type of the substrate film. For example, when the substrate film is a biaxially stretched polyethylene terephthalate film, the method using laser light irradiation is simple and stable. A half-cut line having a depth as described above can be provided. In addition, when the base film is paper or the like, a mechanical method using a blade is suitable in that it is not burnt.

Next, FIG. 2 is a top view which shows the structure of one Example of the strip package of this invention.
3 is a cross-sectional view taken along line AA of the strip package shown in FIG.
In addition, this invention is not limited to these drawings, unless the summary is exceeded.

As shown in FIG. 2, the strip package 100 shown in FIG. 2 and FIG. 3 has a total of 10 contents T such as tablets, 5 in the vertical direction and 2 in the horizontal direction. 1 is sandwiched between the laminated films 10 and 10 'having the structure shown in FIG. 1, and the surroundings of the individual contents T are heat-sealed by the heat-sealing portion 11 and individually wrapped in a continuous packaging form. It is.
Further, in this case, the contents are placed on the outer surface of the laminated film 10 on one side (front side in FIG. 2) of each individual packaging at a position overlapping the enclosed contents T and excluding the surrounding heat seal portion 11. One straight half-cut line 6 having a length about 1.6 times the maximum diameter of T is provided, and between each individual package, each individual package can be easily separated. A perforated intermittent cut line 12 is provided.

  In addition, the said half cut line 6 can be previously provided in the coiled laminated film 10 before packaging the content T, for example. In that case, although not shown in the drawing, a control mark for aligning the filling position of the half-cut line 6 and the content T can be printed on the laminated film 10.

4 (a) and 4 (b) are plan views showing other shapes of half-cut lines provided in the strip package of the present invention, respectively, and (c) are shapes of application examples of the half-cut lines. FIG.
The half-cut line shown in (a) of FIG. 4 is located at a position where the outer surface of the laminated film 10 on one side (front side in the figure) of the individually wrapped package overlaps the content T such as a tablet and the surroundings. Two straight half-cut lines 6 having a length approximately 1.6 times the maximum diameter of the contents T are provided at positions excluding the heat seal part 11 in a shape orthogonal to each other at the center. is there. Note that the two half-cut lines 6 do not necessarily have to be orthogonal.
In the half-cut line shown in FIG. 4B, the straight half-cut line 6 similar to the above-mentioned (A) is further increased by one, and the three half-cut lines 6 are equal to each other at the center. It is provided and configured in an intersecting shape. Also in this case, the angle at which the three half-cut lines 6 intersect is not necessarily equal.
Moreover, the half cut line shown in (c) of FIG. 4 shows the shape of an application example of the half cut line, and the outer surface of the laminated film 10 on one side (front side in the figure) of the individually packaged package. In addition, six straight half-cut lines having a length approximately 0.8 times as large as the maximum diameter of the contents T are placed at positions that overlap the contents T such as tablets and excluding the surrounding heat seal portion 11. Each of the ends intersects with the central portion of the contents T, and is provided in a shape that radially expands outward at an equal angle.

FIG. 5 is an enlarged cross-sectional view of a main part for explaining a method of measuring the breaking strength when the contents enclosed in the strip package of the present invention break through the laminated film and take it out.
In the present invention, when taking out contents such as tablets individually packaged in a strip package, among the laminated films on both sides sealing the contents, the laminated film not provided with the half-cut line From the outside, the package is designed so that the content is pushed with a finger toward the laminated film on which the half-cut line is provided, and the half-cut line part provided on the laminated film is broken by the content and taken out. is there.
Therefore, it is desirable that the method for measuring the puncture strength of the package is a method that matches the above-mentioned design principle as much as possible. For this purpose, the method shown in FIG. 5 described below is adopted.

That is, in FIG. 5, the laminated film 10 provided with the half-cut lines 6 is positioned on the lower side of the package serving as a measurement sample between the sample fixing tool 21 a and the sample fixing tool 21 b shown on the lower side. A piercing tool provided with a hemispherical piercing test head 20 provided with a flat part on the lower surface of the lower end of the mounting column as shown above is fastened and fixed in the area of the surrounding heat seal part. The piercing test head 20 is attached to the test apparatus so as to face the contents T sealed in the package, and the piercing test head 20 is lowered at a predetermined speed to push the contents T downward. T is used to break through 6 parts of the half-cut line of the laminated film 10 and record the maximum load required for the break to obtain the break-through strength.
In the above-mentioned breakthrough test, a Tensilon universal tester [Model: SAT-1150 manufactured by A & D Co., Ltd.] was used and measured using the compression test apparatus. 21a and 21b are attached to the lower fixed platen of the compression test apparatus, and the piercing test head 20 is measured by attaching the attachment column to the upper lifting plate of the compression test apparatus.
The piercing test head 20 has a hemispherical shape in which the upper surface is a circle having a diameter of 10 mm and the lower surface is provided with a circular plane portion having a diameter of 6 mm, and each of the sample fixtures 21a and 21b is a metal plate having a thickness of 4 mm. The center part is cut out into a circle with a diameter of 23 mm, and the heat seal part around the sample package is sandwiched between the two, and the four corners can be tightened with bolts and nuts, etc. The descending speed of the head 20 was measured at 50 mm / min.
The package of the measurement sample has the shape shown in FIG. 2 and FIG. 3, and each package is a square having a side of 36 mm, a circle having a diameter of 10 mm at the center and the thickness of the maximum portion of the longitudinal section. 5 mm oval-shaped tablets are enclosed as the contents T, and the periphery is heat-sealed by the heat-sealing portion 11 leaving a circular non-sealing portion having a diameter of 23 mm at the center, and the laminated film 10 on one side of the package body An aluminum foil as an intermediate layer of the laminated film 10 and one linear half-cut line 6 having a length of 16 mm in the region of the circular non-sealed portion at a position overlapping the enclosed content T on the outer surface of the laminated film 10 The depth is set so as not to cut.

  Hereinafter, the present invention will be described more specifically with reference to examples.

The continuous packaging type strip package 100 having the configuration shown in FIGS. 2 and 3 is produced using the laminated film 10 having the configuration shown in FIG. 1, and the configuration other than the laminated film 10 is common to the following configurations. Then, only the configuration of the laminated film 10 was changed as follows, and strip packaging bodies of Examples 1 to 20 were produced.
That is, the shape of each packaging unit is a square with a length and width of 36 mm each, and 5 pieces in the vertical direction and 2 pieces in the horizontal direction, for a total of 10 individual package bodies, each of which is a perforated cut line. 12 is connected to each other, and each individual package is filled with one oval tablet having a circular shape with a diameter of 10 mm and a maximum longitudinal section of 5 mm as the content T at the center. In addition, the outer periphery is sealed by heat-sealing the laminated films 10 and 10 ′ on both sides with the heat-sealing portion 11, leaving a circular non-sealing portion with a diameter of 23 mm at the center, and one side of each individual package In the region of the non-sealed portion of the laminated film 10, one linear half-cut line 6 having a length of 16 mm is passed through the base film 1 outside the laminated film 10 at a position overlapping the contents T. The aluminum foil 3 of the intermediate layer is Tsu has a structure which is provided to not bet depth.
And as a structure of the laminated film 10, a biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) having a thickness of 12 μm is used for the base film 1, and an isocyanate-based anchor coat layer is used for the bonding surface. In addition, an anchor coat layer surface of the PET film and an aluminum foil (hereinafter referred to as AL foil) 3 (thickness 7 to 20 μm) are used as an adhesive layer 2 and an ethylene / methacrylic acid copolymer is used for a thickness of 5 μm. Then, a polyethylene imine anchor coat layer is provided as an anchor coat layer 4 on the surface of the AL foil 3, and a low density polyethylene (polyethylene resin layer 5 serving as a sealant layer is provided on the anchor coat layer surface. (Hereinafter referred to as LDPE) layer or ethylene methacrylate Acid copolymer (hereinafter referred to as EMAA) was formed by laminating by coating extruded layer (thickness 5 to 50 [mu] m).
(Configuration of the laminated film)
PET film (thickness 12 μm) / isocyanate anchor coat layer (thickness 0.5 μm) / EMAA layer (thickness 5 μm) / AL foil (thickness 7-20 μm) / polyethyleneimine anchor coat layer (thickness 0.5 μm) / LDPE layer Or EMAA layer (thickness 5-50μm)
In the configuration of the laminated film, the thickness of the AL foil and the thickness of the LDPE layer or the EMAA layer of the sealant layer are changed as described in Table 1, and a laminated film is produced. The strip package of Example 1 to Example 20 was fabricated by processing into such a configuration.

  Using the strip package of Examples 1 to 20 produced as described above as a sample, the operability at the time of opening, specifically, the half cut line portion of each individual package is pushed through the contents from the outside to break through “Ease of breakthrough”, “difficulty of popping out” the contents at that time, and “breakthrough strength” of the package and safety during transportation, specifically “hardness of breakage of the AL foil” Were evaluated by the following methods, and the results are summarized in Table 1.

(1) Evaluation method of operability at the time of opening, “easy to break through” and “difficult to jump out” The contents of the package of each sample are half-cut from the outside of the laminated film on the side where no half-cut line is provided. Evaluate the “easy to break through” by applying the force when pushing the finger toward the cut line and breaking through the half cut line, and at that time, the contents will pop out at the same time as the breakthrough Whether or not there was, there was a sensory evaluation of the degree of “difficulty popping out”.
Evaluation criteria for “easy to break through” ◎: Able to break through easily with light force ○: Able to break through with normal force without any problem △: Some force is required to break through, but especially troublesome Evaluation criteria for “difficulty of popping out” without any practical problems ◎: When the package is pierced, the contents do not pop out and are securely held in the broken part ○: When the package is pierced , The contents did not pop out and were lightly locked to the rupture part. △: The contents did not pop out when the package was pierced, but spilled easily.

(2) Measuring method of “breakthrough strength” of package body According to the measurement method of breakthrough strength described in FIG. 5 and paragraph numbers [0025] and [0026].

(3) Evaluation method for safety during transportation, especially “Difficult to break AL foil” Each 20 sheets of strip packaging (200 tablets) of each sample is stored in a carton. After assembling in a cardboard box and mounting on a truck and carrying out a 500 km transportation test, each strip package was taken out and visually examined for damage such as bending of the AL foil and occurrence of cracks.
Evaluation criteria of “Difficult to break AL foil” ◎: No damage such as bending or cracking of AL foil ○: No damage such as crack in AL foil, but heat around package A part of the seal part that contains deformation such as slight bending of the sheet containing the AL foil. △: Although there is no damage such as cracks in the AL foil, the sheet containing the AL foil in the heat seal part around the package Slightly deformed, such as bent, but no problem in practical use

  As is clear from the results shown in Table 1, the strip packaging bodies of Examples 1 to 20 are all “easy to break through” when opened, and “difficult to jump out” of the contents, And, with regard to the safety of transportation, specifically “difficult to break the AL foil”, no problem was obtained even if it was good or bad, and the measurement result of “breakthrough strength” Is also in the range of 14.5 to 26.7N, clears the specified range of 13.0 to 30.0N, easy opening by breakthrough and prevention of popping out the contents at the time of opening, In addition, it was possible to provide a strip package that has the ability to prevent breakage during transportation.

  As described above, the strip package of the present invention can be suitably used mainly as a package for tablets such as pharmaceuticals. However, if the use can effectively utilize its performance, the type of contents, There are no particular restrictions on the application.

It is a schematic cross section which shows the structure of the laminated | multilayer film used for the strip package of this invention. It is a top view which shows the structure of one Example of the strip package of this invention. It is the sectional view on the AA line of the strip package shown in FIG. (A), (b) is a plan view showing another shape of the half-cut line provided in the strip package of the present invention, and (c) is a plan view showing the shape of an application example of the half-cut line. is there. It is an expanded sectional view of the principal part explaining the method of measuring the breaking strength at the time of breaking through the laminated | multilayer film, and taking out the content enclosed with the strip package of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base film 2 Adhesive layer 3 Aluminum foil 4 Anchor coat layer 5 Polyethylene resin layer 6 Half cut wire 10, 10 'Laminated film 11 Heat seal part 12 Perforated cut line 20 Perforation test head 21a, 21b Sample fixture 100 Strip package T Contents

Claims (3)

In a strip package in which both sides of the contents such as tablets are sandwiched between laminated films and the contents are heat sealed and individually wrapped in a continuous packaging form, the laminated film extrudes and laminates a base film and an aluminum foil. After laminating by the method of dry or laminating, a polyethylene resin layer of the sealant layer is laminated on the surface of the aluminum foil via an anchor coat layer by an extrusion coating method or an extrusion laminating method, and the thickness of the aluminum foil is In the range of 7 to 20 μm, and the thickness of the polyethylene resin layer is in the range of 5 to 50 μm, and on the outer surface of the laminated film on one side of each individual package, the position overlaps with the enclosed contents, and A half-cut line that is 3.5 times longer than the maximum diameter of the contents at the position excluding the surrounding heat seal part A strip packaging body, wherein at least one is provided, and the breaking strength when the content is taken out by breaking through the half-cut line portion is in a range of 13.0 to 30.0 N. The strip package according to claim 1, wherein the half-cut line is provided at a depth that penetrates at least the base film and does not cut the aluminum foil. The strip package according to claim 1 or 2, wherein an anchor coat layer provided when a polyethylene resin layer of a sealant layer is laminated on the aluminum foil surface is formed of a polyethylene imine anchor coat agent. .

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