JP6303596B2 - Package and method for producing the same - Google Patents

Description

  The present invention relates to a package in which contents are stored in an easily openable packaging bag and a method for manufacturing the same, and particularly to a package formed by facing the sealant surfaces of front and back materials and heat-sealing four sides.

  2. Description of the Related Art Conventionally, a four-sided sealed package called a so-called flat bag that seals two packaging materials with their sealant surfaces facing each other and heat-sealing four sides has been used for various applications. The most common method for opening a package having such a structure is to provide a notch for opening at the end of the seal portion, and open the package in a direction perpendicular to the seal portion.

  However, according to this method, the tear of the packaging material often deviates sideways and does not reach the facing seal side, and a continuous opening across the package may not be obtained. Even if the package can be opened across the package, the opening end surfaces of the front and back surfaces overlap, so there is no problem as long as the opening is poor and the content is rigid and slippery. If the contents are bad, it may be difficult to pick out the contents from the opening.

  If the opening position is set so as to penetrate deeply into the contents in order to improve the pick-up property from the opening, the contents may be damaged at the time of opening. Further, when the opening line is deviated sideways and the tear of the packaging material is greatly displaced inward, the contents may be similarly damaged.

  In addition, since there is no structural difference between the front and back surfaces of flat bags, when storing the contents that must be distinguished between the front and back surfaces, the front and back surfaces are recognized by displaying something on the surface of the packaging bag. There was a need.

  As described above, even in the same flat bag, various opening structures are required depending on the shape and properties of the contents and the usage method.

  The packaging bag described in Patent Document 1 opens the front and back surfaces by providing the notch provided in the seal portion as the opening start point so that the crest and trough patterns of the opening guide line do not overlap with the front and back materials. It is a packaging bag that does not overlap end faces and is easy to open.

  Although the packaging bag described in patent document 1 has the characteristic that the opening of a large opening diameter which crosses a package body is obtained comparatively stably by providing an opening guide wire, Since the exposed area is small, it could not be applied to flat plate-like contents, poorly slipped contents, contents that require front / back recognition, or delicate and easily damaged contents.

JP 2005-289396 A

  The problem to be solved by the present invention is particularly good in opening and taking out even if the contents are flat and thin and have no waist, contents that are not slippery, or contents that are delicate and easily damaged. The present invention proposes a packaging body, and further a packaging body capable of recognizing the front and back of the contents requiring front and back recognition, and a method for manufacturing the packaging body.

As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a heat-sealing resin layer surface is formed by using a packaging material made of a laminate having a heat-sealing resin layer as an innermost layer as a surface material and a back material. It is a package made by facing each other and heat-sealing four sides,
One side seal part has a notch for opening that triggers opening,
On the surface of the surface material, a surface opening guide line that is formed by fragile processing and is a score line that does not penetrate the surface material is provided.
The surface opening guide line starts from a starting point set at a height between the opening notch and the top seal part, and after having slanted and passed through the vicinity of the opening notch, the surface opening guide line is directed horizontally. It is a continuous line that reaches the end point set near the side seal part on the opposite side of the opening notch,
On the surface of the back surface material, a back surface opening guide line that is formed by fragile processing and is a score line that does not penetrate the back surface material is provided,
The back surface opening guide line is formed upside down so as to be substantially line symmetrical with the front surface opening guide line, with a horizontal line passing through the opening notch as a center line,
Flat contents are stored, and the surface opening guide line is provided so as to cross the outer periphery of the contents, and at least 50% of the side or outer peripheral length of the contents from the opening after opening. On the other hand, the back surface opening guide wire is disposed so as to avoid the contents .

  The packaging body according to the present invention is provided with an opening guide line on the surface material, and after the tear of the surface material starting from the opening notch is once inclined, the direction is changed in the horizontal direction and the side opposite to the opening notch Since it reaches the vicinity of the seal portion, the opening portion is greatly opened, and the contents can be easily taken out.

In the invention according to claim 2, when the tear load in the vertical direction of the front surface opening guide line or the back surface opening guide line is F1v and the tear load in the horizontal direction is F1p, F1v ≦ F1p The package according to claim 1 , wherein:

In the invention according to claim 3, when the breaking load in the vertical direction of the front surface opening guiding line or the back surface opening guiding line is F2v and the breaking load in the horizontal direction is F2p, F2v ≦ F2p a packaged body according to claim 1 or 2, characterized in that.

The invention according to claim 4, claim 1, wherein the innermost layer of heat sealable resin layer, with the contents, the coefficient of static friction as defined in JIS K7125 is 0.3 or more It is a package of any one of these.

Further, the invention according to claim 5, contents are immersed in water, alcohol, oil, fluid such as a chemical solution, characterized in that at least the surface is wet state, either of the preceding claims 1 The package according to item.

The invention according to claim 6 is the package according to any one of claims 1 to 5 , wherein the waist strength of the contents is lower than the waist strength of the packaging bag.

Further, the invention according to claim 7, wherein the surface opening guidewire or rear opening guide wire is formed by a laser processing method, characterized in that it does not penetrate the innermost layer of heat sealable resin layer of the packaging material according Item 7. The package according to any one of Items 1 to 6 .

Moreover, invention of Claim 8 is a manufacturing method of the package body of any one of Claims 1-7 characterized by including the following processes in this order.
That is, a process of forming an opening guide line by a laser processing method on a printed packaging material.
A process of slitting the printed packaging material to a predetermined width.
This is a step of forming a seal portion and providing a notch for opening.

  Since the package according to the present invention has seal portions on all sides, the waist strength, which is the force that keeps the packaging bag flat against external stress, is strong. For this reason, even when the waist strength of the contents is low or when the occupancy of the contents is low compared to the packaging bag, the opening and closing of the packaging material on the front and back surfaces is suppressed, and the opening is guided from the opening notch. It can be opened stably along the line.

  Moreover, the opening is smooth, and it is difficult to cause an accident in which the contents are damaged or dropped at the time of opening. Further, the contents are not reversed in the packaging bag.

  Even if the package according to the present invention is flat, has a viscous surface, and has poor slipperiness, it is difficult to pull out from the opening of the packaging bag and take it out. Can be removed cleanly without removing the contents.

  In addition, the packaging body according to the present invention is provided in a shape in which only the opening guide line on the front surface is directed inward of the packaging body with respect to the front and back surfaces having no structural difference, and the opening state in which only the surface is greatly opened Therefore, even when contents that require front and back recognition are stored, the front and back sides are not mistakenly taken out.

  In addition, after opening, the opening part is attached to the facing seal part and does not break off and is not separated, so that it does not become dust and can be easily resealed.

  As in the second aspect of the present invention, the back surface opening guide formed on the surface of the back surface material so that the horizontal line passing through the notch for opening is a center line and is upside down so as to be substantially line symmetrical with the front surface opening guide line. When a line is provided, the opening guide lines on the front and back surfaces are arranged so that the opening area increases as the opening proceeds, so that an opening having a wider opening area can be stably obtained. it can. Further, since the back surface opening guide line proceeds in a direction to avoid the contents, the tear of the packaging material is less likely to damage the contents.

  In the packaging body according to the present invention, the opening guide line provided in the vertical direction is particularly easily cut off because it is opened while applying stress in a substantially perpendicular direction from the notch for opening toward the seal portion on the opposite side. Is preferred. As in the invention described in claim 3 or 4, by making the vertical opening guide line equal or weaker than the tearing load or breaking load of the horizontal opening guide line, the vertical opening guide line is reduced. In the case where the front and back surfaces are opened in opposite directions as in the package according to claim 2, there is an effect of making the opening more stable.

  As in the invention described in claim 5, flat contents are stored, and the surface opening guide wire is provided so as to cross the outer periphery of the contents, and at least the contents are opened from the opening after opening. When 50% or more of one side or the outer peripheral length is exposed, the content can be taken out well, and there is a part that crosses the opening guide wire and the outer periphery of the content, so the content falls. hard.

Further, as in the invention described in claim 6, when the static friction coefficient between the innermost heat-sealable resin layer and the content is 0.3 or more and the slipperiness is poor, for example, the content is a condom, transdermal absorption In the case of drugs, artificial skin, oral deliquescent drugs, etc., it is difficult to take out the contents by the conventional opening method that opens the end of the bag, but in the package according to the present invention, it is sufficient. It can correspond to.

  Further, as in the invention described in claim 7, the contents are soaked in a fluid such as water, alcohol, oil, chemical solution, etc., and at least the surface is in a wet state, for example, clean cotton, lotion cotton, aromatic nonwoven fabric, etc. Even so, since the single side of the packaging body opens greatly, the contents can be easily taken out without being damaged. The same applies to the case where the waist strength of the contents is lower than the waist strength of the packaging bag as in the invention described in claim 8.

Further, when the opening guide line is formed by a laser processing method as in the invention described in claim 9, the heat seal of the innermost layer is obtained by optimally combining the layer structure of the packaging material and the wavelength of the laser. It is easily possible not to penetrate the conductive resin layer, and a package with stable quality can be obtained. Moreover, the freedom degree of the shape of an opening guide line increases.

FIG. 1 is a schematic view showing an embodiment of a package according to the present invention. FIG. 2 is a schematic view showing a state where the package shown in FIG. 1 is opened. FIG. 3 is a schematic plan view of a packaging material used for the package shown in FIG. FIG. 4 is a schematic view showing another embodiment of the package according to the present invention. FIG. 5 is a schematic view showing a state in which the package shown in FIG. 4 is opened. FIG. 6 is a schematic plan view of the packaging material used in the package shown in FIG. FIG. 7 is a schematic view showing another embodiment of the package according to the present invention. FIG. 8 is a schematic view showing a package of Comparative Example 1. FIG. 9 is a schematic view showing a package of Comparative Example 2.

Hereinafter, the package according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an embodiment of a package (1) according to the present invention. Moreover, FIG. 2 is the schematic diagram which showed the state which opened the package (1) shown in FIG. FIG. 3 is a schematic plan view of the packaging material (2) used in the packaging body (1) shown in FIG. In FIG. 3, the hatched portion indicates the planned seal portion (10).

  As shown in FIG. 1, the packaging body (1) according to the present invention comprises a packaging material (2) made of a laminate having a heat-sealable resin layer as the innermost layer as a front surface material (3) and a back surface material (4). As mentioned above, the heat-sealable resin layer surfaces are opposed to each other, and the four sides are heat-sealed.

  One side seal part (5a) has a notch (9) for opening, and the surface of the surface material is formed by a fragile process on the surface of the surface material. (7) is provided.

The surface opening guide line (7) starts from a starting point (s) set at a height between the opening notch (9) and the top seal portion (6), and is inclined downward to open the opening notch (9). Is a continuous line that reaches the end point (e) set in the vicinity of the side seal portion (5b) on the opposite side of the opening notch (9) after changing in the horizontal direction.

  When the package (1) shown in FIG. 1 is opened from the opening notch (9), as shown in FIG. 2, the tear of the surface material (3) is immediately captured by the surface opening guide line (7). And proceed along the surface opening guide line. The tear in the back material (4) proceeds in a substantially horizontal direction.

  The tears on the front and back surfaces stop when they reach the side seal portion (5b) on the opposite side of the opening notch. Therefore, the unsealed pieces are not scattered and no extra dust is generated. In addition, it can be easily resealed.

  As shown in FIG. 2, the packaging body (1) according to the present invention has a wide opening while the back material (4) remains wide. With the four-sided bag provided with the opening having the front and back surfaces, it is possible to easily take out things that are difficult to take out.

  As shown in FIG. 2, the surface opening guide line (7) is provided so as to cross the outer periphery of the content (11), and at least one side or the outer peripheral length of the content (11) from the opening after opening. If it is designed so that 50% or more is exposed, it becomes easy to ensure the ease of taking out.

  Moreover, since the surface opening guide wire (7) crosses the outer periphery of the contents (11), the contents are caught on the cut surface of the surface material (3) even after opening. There is an effect to prevent falling.

  Further, the package (1) according to the present invention is such that the content (11) is soaked in a fluid such as water, alcohol, oil, or a chemical solution, and at least the surface is in a wet state, or the surface is sticky or adherent. This is particularly effective when the friction coefficient between the content and the heat-sealable resin layer that is the innermost layer of the packaging material (the static friction coefficient defined in JIS K7125) is 0.3 or more. Is demonstrated.

  Moreover, the package (1) according to the present invention has a low waist strength of the contents (11) and is weaker than the waist strength of the packaging bag, The effect is exhibited even when the occupation ratio is small.

  FIG. 3 is a schematic plan view of the packaging material (2) used in the package shown in FIG. In this example, the front surface material (3) and the back surface material (4) are made of a laminate having different layer structures. Of course, these may be a laminate having the same layer configuration.

  The starting point (s) of the surface opening guide line (7) is set to a height between the opening notch (9) and the top seal portion (6). The position of the starting point (s) may be the inner edge of the side seal portion (5a) of the surface material (3) as shown in FIGS. 1 and 3, but may be on the surface material (3) or the side seal portion ( 5a) may be sufficient as long as the tear of the surface material (3) starting from the opening notch (9) is reliably captured.

  The surface opening guide line (7) starting from the start point (s) is slanted, passes through the vicinity of the opening notch (9), and then changes the direction in the horizontal direction to the side seal opposite the opening notch. The end point (e) set near the part (5b) is reached.

  It is preferable that the descending line from the start point (s) is slightly inclined rather than vertical. If it is vertical, the tear starting from the opening notch may run upward.

  Further, the horizontal line toward the end point (e) does not have to be strictly horizontal, and may be a slightly descent line.

  In the embodiment shown in FIGS. 1 to 3, since there is no opening guide line in the back surface material, the tear of the back surface material becomes a certain degree. Therefore, in order to make the cut surface of the back material clean, a horizontal opening guide line may be formed on the surface of the back material.

  FIG. 4 is a schematic view showing another embodiment of the package (1) according to the present invention. FIG. 5 is a schematic view showing a state in which the package (1) shown in FIG. 4 is opened. FIG. 6 is a schematic plan view of the packaging material (2) used in the packaging body (1) shown in FIG.

  In the examples shown in FIGS. 4 to 6, the back surface opening guide line (8) that is formed by fragile processing and does not penetrate the back surface material is provided on the surface of the back surface material (4). As shown in FIG. 4, the line (8) is turned upside down so that the horizontal line (12) passing through the opening notch (9) is a center line and is substantially line symmetrical with the surface opening guide line (7). Is formed.

  In this way, since the opening guide line is also formed on the back surface material, as shown in FIG. 5, the tear of the packaging material can be opened without affecting the contents (11) at all. It becomes possible. For this reason, the outstanding effect can be exhibited with respect to the contents which are difficult to handle as described above.

  The back surface opening guide line (8) does not need to be formed strictly symmetrically with the horizontal line (12) passing through the opening notch (9) as the center line, as shown in the example of FIG. It does not matter if it is slightly off.

  In the example shown in FIGS. 4-7, when the tear of the front and back surface material which started from the notch for opening (9) reaches the opening guide line on the front and back surfaces, it proceeds in the upside down direction. For this reason, it is preferable that the laminated body which comprises front and back materials has a property which is easy to tear to an up-down direction compared with a horizontal direction.

  The ease of tearing of the opening guide wire can be evaluated by a tear load and a breaking load as substitute characteristics. In other words, if F1v is the tear load in the vertical direction of the opening guide line and F1p is the tear load in the horizontal direction, better results can be obtained if F1v ≦ F1p.

  Further, when F2v is the breaking load in the vertical direction of the opening guide line and F2p is the breaking load in the horizontal direction, better results can be obtained if F2v ≦ F2p.

  In the example shown in FIGS. 4 to 6, the front surface material (3) and the back surface material (4) are composed of a single laminate, and as shown in FIG. 6, an opening notch (9) is provided. It is connected by the part used as a side seal part (5a).

  When the opening guide lines are formed on the front and back surfaces, it becomes easy to align the opening guide lines on the front and back surfaces. Thus, it is preferable to fold one laminate at the center to form the front and back surfaces. As shown in FIG. 6, in the state where one laminated body is developed, the opening guide lines on the front and back surfaces are arranged point-symmetrically around the position of the opening notch.

  As a method of forming the opening guide line (7, 8), there are a method using a blade such as a die cutter and a method using a laser. In the case of forming by laser processing, only a specific layer can be selectively cut by combining the laser wavelength and the layer structure of the laminate. As a result, it is possible to easily prevent the innermost heat-sealable resin layer from penetrating, and a product with stable quality can be obtained.

  In addition, drawing of the opening guide line by laser has a high degree of freedom in shape, and an optimal opening guide line can be designed according to the purpose.

Next, the material used for the package (1) according to the present invention will be described.
The layer structure of the laminate constituting the packaging material (2) is not particularly limited except that the innermost layer has a heat-sealable resin layer. The most basic layer configuration is a configuration comprising a base film / heat-sealable resin layer. However, an adhesive layer for bonding them, a printing layer, and the like may naturally be included.

  Examples of the layer added to the two layers include a gas barrier layer and an intermediate layer. As a special application, a light shielding layer, an ultraviolet absorption layer, or the like may be added. The base material layer may also serve as a gas barrier layer.

  As the base material layer, a biaxially stretched film such as a polyethylene terephthalate resin film (PET), a stretched polypropylene resin film (OPP), or a stretched nylon film (ONy) is generally used in consideration of printability. It is done.

  As the gas barrier layer, aluminum foil, aluminum vapor deposition film, metal oxide vapor deposition film, various gas barrier resin films and the like are used.

  As the heat-sealable resin layer, polyolefin resins such as polyethylene resin and polypropylene resin are most commonly used. In the case of the packaging bag according to the present invention, particularly easy peelability is not required. Among them, low density polyethylene resin (LDPE), linear low density polyethylene resin (LLDPE), non-stretched, which have good sealability. A single resin such as polypropylene resin (CPP) is sufficient. The heat-sealable resin layer may be laminated by extruding the resin and extruding it to the base material layer, or by bonding one formed into a film.

  For laminating these layers, a dry laminating method using an adhesive, an extruding laminating method in which an adhesive resin is extruded from a T die, and a combination thereof are used.

  For the production of the packaging material (2), first, the substrate layer is subjected to a necessary printing process and bonded to the intermediate layer or the heat-sealable resin layer to obtain a laminate. Next, an opening guide line (7, 8) is formed in the packaging material (2), and slit processing is performed to a predetermined width. The opening guide line may be formed after the slit processing, but it is more efficient to form the opening guide lines together in a wide state. All of the above steps are continuously performed in a winding state.

In the filling factory, the wound packaging material (2) is unwound, the contents are placed, and the side seal portions (5a, 5b), the top seal portion (6), and the bottom seal portion are formed. The top seal portion and the bottom seal portion may be formed at the same time and cut at the center. Finally, an opening notch (9) is formed to complete the package.
Hereinafter, based on an Example, the package which concerns on this invention is demonstrated more concretely.

As the packaging material, the following three types of laminates A, B, and C were prepared. The meanings of the abbreviations are as follows.
PET: Polyethylene terephthalate resin film PE: Polyethylene resin LDPE: Low density polyethylene resin AL: Aluminum foil EX: Extrusion lamination (including anchor treatment)
DL: Dry laminate

<Layer Configuration of Laminate> Numbers indicate thickness (μm).
A: PET12 / Ink / EX (LDPE15) / AL7 / EX (LDPE30)
B: PET12 / Ink / EX (PE15) / AL7 / EX (PE15) / LDPE30C: PET16 / Ink / EX (PE15) / AL7 / EX (PE15) / LDPE30

  The above-mentioned three types of packaging materials are formed by laser-processing an opening guide wire as shown in FIGS. 1, 4, 8, and 9, slit into a predetermined width, made into bags, and contents shown below I stored things. The contents are all distinctive.

<Contents>
Transdermal drug: Base material (nonwoven fabric) / Adhesive layer (medicinal component)
Condom: Made of urethane rubber with lubricating oil (silicone oil) applied to the surface

  The packaging body of Examples 1-3 was created by the combination of a packaging material, an opening guide wire, and the contents. The package was manually opened and evaluated for unpackability and unloadability. About opening property, it was set as (circle) when the opening opening as planned along the opening guide line was obtained, and when it was not obtained, it was set as x. As for the take-out property of the contents from the packaging bag, it was indicated as “◯” when the contents could be recognized and taken out, and “X” when the contents could not be recognized or taken out.

The physical strength was evaluated according to the test method specified in the following document.
Tear load: JIS K7128-1
Breaking load: JIS K7127 / 2/100

<Comparative example>
As a comparative example, the same packaging material used in Examples 1 to 3 was used to produce a packaging bag of the same size, and the same contents were stored. Front and back opening guide lines are straight (Comparative Example 1), front and back opening guide lines are in the same direction (Comparative Example 2), and the laminate of Example 3 is reversed vertically and horizontally (Comparative Example 3) ) Of three comparative examples.

  Tables 1 and 2 below show the combinations of packaging materials, opening guide wire shapes, contents, and the like used in Examples 1 to 3 and Comparative Examples 1 to 3, and evaluation results.

  As can be seen from Table 1 and Table 2, the packaging bodies of Examples 1 to 3 according to the present invention have good results for both opening and taking out, whereas the packaging of Comparative Example 1 is The take-out aptitude was bad. Moreover, the packaging bodies of Comparative Examples 2 and 3 had poor opening suitability, and did not lead to evaluation of take-out suitability.

  As described above, the package according to the present invention exhibits good opening suitability and take-out suitability even when contents that are thin, weak, and have poor surface slipperiness are stored.

DESCRIPTION OF SYMBOLS 1 ... Packaging 2 ... Packaging material 3 ... Surface material 4 ... Back material 5a, 5b ... Side seal part 6 ... Top seal part 7 ... Surface opening guide wire 8 ... back side opening guide line 9 ... notch for opening 10 ... planned seal part 11 ... contents 12 ... horizontal line s passing through notch for opening s ... start point e ... end point

Claims (8)

A packaging material formed by laminating a packaging material composed of a laminate having a heat-sealable resin layer in the innermost layer as a front material and a back material, facing the heat-sealable resin layer surfaces, and heat-sealing four sides,
One side seal part has a notch for opening that triggers opening,
On the surface of the surface material, a surface opening guide line that is formed by fragile processing and is a score line that does not penetrate the surface material is provided.
The surface opening guide line starts from a starting point set at a height between the opening notch and the top seal part, and after having slanted and passed through the vicinity of the opening notch, the surface opening guide line is directed horizontally. It is a continuous line that reaches the end point set near the side seal part on the opposite side of the opening notch,
On the surface of the back surface material, a back surface opening guide line that is formed by fragile processing and is a score line that does not penetrate the back surface material is provided,
The back surface opening guide line is formed upside down so as to be substantially line symmetrical with the front surface opening guide line, with a horizontal line passing through the opening notch as a center line,
Flat contents are stored, and the surface opening guide line is provided so as to cross the outer periphery of the contents, and at least 50% of the side or outer peripheral length of the contents from the opening after opening. Exposed, on the other hand, the back surface opening guide line is disposed so as to avoid the contents . Tearing load in the vertical direction of the line of the surface opening guidewire or rear opening guide wire F1v, tearing load in the horizontal direction of the line segment when a F1p, to claim 1, characterized in that the F1v ≦ F1p The package described. F2v the breaking load of the vertical line of the surface opening guidewire or rear opening guide wire, when the F2p the breaking load of the horizontal line segments, or claim 1, characterized in that a F2v ≦ F2p 2. The package according to 2 . The package according to any one of claims 1 to 3 , wherein a static friction coefficient defined by JIS K7125 between the innermost heat-sealable resin layer and the content is 0.3 or more. The package according to any one of claims 1 to 4 , wherein the contents are immersed in a fluid such as water, alcohol, oil, or a chemical solution, and at least the surface is in a wet state. The package according to any one of claims 1 to 5 , wherein the waist strength of the contents is lower than the waist strength of the packaging bag. The said front surface opening guide wire or back surface opening guide wire is formed by the laser processing method, and does not penetrate the heat sealable resin layer of the innermost layer of a packaging material, The one of Claims 1-6 characterized by the above-mentioned. Packaging. The manufacturing method of the package according to any one of claims 1 to 7 , wherein the following steps are included in this order.
The process of forming an opening guide line by laser processing on the printed packaging material.
A process of slitting the printed packaging material to a predetermined width.
Forming a seal part and providing a notch for opening;