JP5970777B2 - Package and method for producing the same - Google Patents

Description

  The present invention relates to a package that is excellent in easy-openability and from which contents can be easily taken out.

  Conventionally, a laminated film obtained by laminating a film in which two layers of linear low density polyethylene film are blocked by heat and / or pressure during production and a base film such as biaxially stretched nylon or biaxially stretched polyester Is made into a double package.

  The above laminated film is a linear low density polyethylene film that is blocking-adhered, and behaves as one film until it is filled with the contents, and after filling the contents and producing a package, When an impact is applied, the blocking adhesive peels off easily and behaves as two films. As a result, pinhole resistance, impact resistance, and tear propagation strength can be improved.

  For example, Patent Document 1 discloses a double package made of laminated films laminated by an extrusion laminating method. However, the package disclosed in Patent Document 1 has poor openability, and is difficult to open without scissors or cuts.

  Therefore, in recent years, there has been a demand for an easy-open packaging body. For example, in Patent Document 2 (Patent No. 4490045), on both side edges that are obtained by curving a multiple film extruded in a tube shape into a cylindrical shape. In addition to forming a vertical seal portion, an upper horizontal seal portion and a lower horizontal seal portion in a direction intersecting the vertical seal portion are formed, and the formed vertical seal portion, upper horizontal seal portion, and lower horizontal seal portion are easily opened. A double package is disclosed.

JP 2002-36462 A Japanese Patent No. 4490045

  However, in the double package described in Patent Document 2, since the film in contact with the contents and the film in contact with the outside air are made of the same material, it is subject to versatility.

  Then, this invention is made | formed in view of the said situation, and an object of this invention is to provide the packaging body with favorable openability using a laminate manufacturing method, and its manufacturing method.

  In order to achieve this object, the present invention has the following features.

The package according to the present invention is:
A laminated film composed of at least three layers of a base material layer, a seal layer, and an intermediate layer that is interposed between the base material layer and the seal layer and is pseudo-adhered to the seal layer. A package formed by curving ,
Has a seal portion in which the sealing layers to each other is heat-welded,
The sealing layer has a melting point higher than that of the intermediate layer and is easy to open.

The manufacturing method of the package according to the present invention includes:
A laminated film in which at least three layers of a base material layer, a seal layer, and an intermediate layer interposed between the base material layer and the seal layer are laminated, and the seal layer and the intermediate layer are pseudo-bonded The laminated film thus formed is curved into a cylindrical shape, and the seal layers are overlapped with each other and thermally welded to form a seal portion. The seal layer has a melting point higher than that of the intermediate layer and is easily opened. It forms the package which has property.

  According to the present invention, it is possible to obtain a package with good openability using a laminate manufacturing method.

It is a figure which shows the structural example of the package 1 of this embodiment, (a) shows the example of whole structure of the package 1, (b) shows the example of a side structure seen from the A direction of (a). FIG. It is a figure which shows the structural example of laminated film F which forms the package 1 of this embodiment, (a) shows the structural example of laminated film F, (b) is laminated film F shown to (a) It is a figure which shows the state which piled up. It is a figure which shows the example of a manufacturing method of the package 1 of this embodiment. FIG. 5 is a view showing another configuration example of a laminated film F for molding the package 1 of the present embodiment.

<Outline of Package 1>
First, the outline | summary of the package 1 of this embodiment is demonstrated, referring FIG. 1, FIG.

  The package 1 of this embodiment is interposed between the base material layer 101, the seal layer 104, and the base material layer 101 and the seal layer 104 shown in FIG. As shown in FIG. 2 (b), the laminated film F composed of at least three layers of the intermediate layer 103 is curved into a cylindrical shape, and has a sealing portion 22 formed by overlapping and welding the sealing layers 104. In addition, the sealing layer 104 has a higher melting point than the intermediate layer 103, and is easy to open.

  In the packaging body 1 of the present embodiment, the sealing portion 22 formed by overlapping and welding the sealing layers 104 has easy-opening properties. Therefore, when the packaging body 1 is opened, the sealing layers 104 are overlapped. The seal part 22 can be easily opened by holding the grip part 21 shown in FIG. As a result, it is possible to obtain a package 1 with good openability using a laminate manufacturing method. Hereinafter, the packaging body 1 of the present embodiment will be described in detail with reference to the accompanying drawings.

<Configuration example of package 1>
First, a configuration example of the package 1 according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a configuration example of a package 1 according to the present embodiment, FIG. 1 (a) shows an example of the overall configuration of the package 1, and FIG. 1 (b) is a diagram of FIG. 1 (a). It is a figure which shows the example of a side surface structure seen from A direction. FIG. 2 is a diagram illustrating a configuration example of the laminated film F that forms the package 1 of the present embodiment, FIG. 2A illustrates a configuration example of the laminated film F, and FIG. It is a figure which shows the state which laminated | stacked the laminated films F shown to 2 (a).

  The package 1 shown in FIG. 1 of the present embodiment is formed by stacking and welding the sealing layers 104 of the laminated film F shown in FIG. 2 (a) together as shown in FIG. 2 (b). The laminated film F shown in FIG. 2A has a base material layer 101, a buffer layer 102, an intermediate layer 103, and a seal layer 104, and the intermediate layer 103 and the seal layer 104 are pseudo-bonded. The other layers are bonded together. The pseudo-adhesion in this embodiment does not mean that the intermediate layer 103 and the seal layer 104 are bonded together by an adhesive or heat fusion and are completely integrated and hardened. It means that it is in a flexible state due to adhesion (pseudo-adhesion). The pseudo-adhesion may be bonded over the entire surface between the intermediate layer 103 and the seal layer 104, or may be partially bonded to a part of the entire surface between the intermediate layer 103 and the seal layer 104. good. The adhesive strength between the intermediate layer 103 and the seal layer 104 is a value measured by a 180 ° peeling method at a tensile speed of 50 mm / min, 10 to 200 g / 15 mm, preferably 20 to 100 g / 15 mm, more preferably 30 to 70g / 15mm. The intermediate layer 103 and the sealing layer 104 that are pseudo-adhered behave as a single film until the contents are filled, and after the contents 1 are filled and the package 1 is manufactured, an impact is applied. When this occurs, the pseudo-adhesion is easily peeled off, and the intermediate layer 103 and the sealing layer 104 are peeled off and behave as two films. As a result, pinhole resistance, impact resistance, and tear propagation strength can be improved.

  The laminated film F shown in FIG. 2A can be configured using a dry lamination method, an extrusion lamination method, or the like. For example, when the laminated film F shown in FIG. 2 (a) is formed using the dry laminating method, a film composed of the base layer 101, a film composed of the buffer layer 102, the intermediate layer 103, and the seal layer 104 Can be dry laminated with a polyurethane adhesive or the like to form a laminated film F. When the laminated film F shown in FIG. 2 (a) is formed using the extrusion laminating method, the film formed of the base layer 101, the film formed of the intermediate layer 103, and the seal layer 104 are combined with a T die. The laminated film F can be formed by laminating with the molten resin constituting the buffer layer 102 which has been extruded more. Since the laminated film F of the present embodiment is constituted by using a film constituted by the base material layer 101 and films constituting the other layers 102 to 104, the base material layer 101 can be subjected to a printing process. it can. As a result, it is possible to form a laminated film F that has been subjected to a desired printing process.

  The base material layer 101 is made of a resin such as non-stretched polyamide, stretched polyamide, ethylene-α olefin copolymer, polypropylene, high-density polyethylene, linear low-density polyethylene, and nylon. The base material layer 101 is preferably configured with a thickness of 10 to 30 μm, and more preferably configured with a thickness of 15 to 25 μm.

  The buffer layer 102 is a layer interposed between the base material layer 101 and the seal layer 104, and adheres the base material layer 101 and the intermediate layer 103 or functions as a buffer material. The buffer layer 102 is made of, for example, a polyethylene resin, and is preferably made of a resin having strength between the base material layer 101 and the intermediate layer 103. The buffer layer 102 is preferably configured with a thickness of 10 to 30 μm, and more preferably configured with a thickness of 15 to 25 μm.

  The intermediate layer 103 is an intermediate layer interposed between the base material layer 101 and the seal layer 104, and is composed of at least a resin having a melting point lower than that of the seal layer 104, and two or more mixed resins having easy peel suitability, or Consists of linear low density polyethylene resin. In the intermediate layer 103, for example, 0.0015 wt% of fine silica having an average particle size of 3.5 μm as an antiblocking agent and 0.03 wt% of erucamide as a lubricant are added to a linear low density polyethylene having a density of 0.922 and MI of 1.2. Consists of resin. Resins with easy peel suitability include ethylene resins such as linear low density polyethylene and ethylene-α-olefin copolymers, and propylene resins such as polypropylene, ethylene-propylene copolymers and ethylene-propylene-butene terpolymers. Examples thereof include a mixed resin with a resin. The intermediate layer 103 is preferably formed with a thickness of 30 to 60 μm, and more preferably formed with a thickness of 40 to 50 μm.

  The sealing layer 104 preferably has a higher melting point than the intermediate layer 103. With this configuration, it is possible to easily cause delamination between the seal layers 104 in the seal portion 22 formed by stacking and welding the seal layers 104 to each other, thereby improving the unsealing property. The seal layer 104 is preferably composed of two or more mixed resins having easy peel suitability. Examples of resins having easy peel suitability include ethylene-based resins such as linear low-density polyethylene and ethylene-α-olefin copolymers, and propylene-based resins such as polypropylene, ethylene-propylene copolymers and ethylene-propylene-butene terpolymers. And a mixed resin. Note that the seal layer 104 is preferably configured by mixing at least the resin constituting the intermediate layer 103. Thereby, the adhesive force with the intermediate | middle layer 103 can be improved. The seal layer 104 preferably includes 50% by weight or more of the resin constituting the intermediate layer 103. Thereby, since the composition of the seal layer 104 can be brought close to the composition of the intermediate layer 103, the adhesive force with the intermediate layer 103 can be further improved. However, since the sealing layer 104 is configured to have a melting point higher than that of the intermediate layer 103, the sealing layer 104 is preferably configured to include the resin constituting the intermediate layer 103 in a range of 50 to 80% by weight. Thereby, the sealing layer 104 has a higher melting point than the intermediate layer 103, constitutes an agglomerated easily peelable seal, and can improve the adhesive force with the intermediate layer 103. The seal layer 104 is preferably formed with a thickness of 30 to 60 μm, and more preferably formed with a thickness of 40 to 50 μm.

  The package 1 of the present embodiment is formed by laminating the laminated film F shown in FIG. 2A formed by the above-described laminate manufacturing method into a cylindrical shape as shown in FIG. A seal portion 22 of the vertical seal portion 2 shown in FIG. 1 is formed by the welded portion together, and an upper horizontal seal portion 3 and a lower horizontal seal portion 4 in a direction intersecting the vertical seal portion 2 are formed. Further, the grip portion 21 of the vertical seal portion 2 shown in FIG. 1 is formed at a portion where the seal layers 104 are overlapped and not welded. The grip portion 21 is formed at the end of the seal portion 22. The package 1 according to the present embodiment is filled with contents. Examples of the contents include liquid foods such as sauces, ketchups, juices, and flower pastes, and viscous foods. However, the content is not particularly limited, and any content can be filled.

  The vertical seal portion 2, the upper horizontal seal portion 3, and the lower horizontal seal portion 4 are arranged so that the vertical seal portion 2, the upper horizontal seal portion 3, and the lower horizontal seal portion 4 are opened before the package 1 is opened to take out the contents. Without peeling, and when opening the package 1, the seal part 22 is peeled off simply by grasping the grip part 21 constituting the vertical seal part 2 with a finger and pulling the film F, the vertical seal part 2, An agglomerated easily peelable seal is formed such that the upper horizontal seal portion 3 and the lower horizontal seal portion 4 are easily peeled off.

  The cohesive peel easy-open seal is one in which the seal layer 104 constituting the seal portion 22 shown in FIG. 2B is broken and peeled off, and no stringing occurs during peeling. For this reason, the resin constituting the package 1 is not mixed into the contents. In addition, the seal strength is stable with a smooth peeling feeling, and the temperature dependency is very small. Furthermore, a pure white peeling mark is generated on the peeling surface. This white peeling mark can be used to check the sealing status in the packaging process since it can be visually confirmed whether or not the seal is suitable. As a result, the reliability of the contents filled in the package 1 can be maintained.

<Method for producing package 1>
Next, an example of a method for manufacturing the package 1 according to this embodiment will be described with reference to FIG.

  The packaging body 1 of the present embodiment uses a pillow packaging machine 10 as shown in FIG. 3, and the contents are contained in a bag made of a laminated film F sealed by a vertical seal portion 2, a lower horizontal seal portion 4, and an upper horizontal seal portion 3. The package 1 filled with the product W is manufactured.

  FIG. 3 shows the completion of feeding of the laminated film F during the steady operation. In FIG. 3, the first horizontal sealing machine 16 and the second openable / closable machine 16 can be opened and closed to the ironing part 8 that is flattened by squeezing the upper open part side of the package 1x before separation by closing the ironing roll 15 that can be freely opened and closed. The horizontal seal portion 17 provided with an upstream welding region that becomes the lower horizontal seal portion 4 and a downstream welding region that becomes the upper horizontal seal portion 3 in order from the upstream side to the downstream side by closing the horizontal sealing machine 17 Forming. Then, an openable and closable press / cutter 18 is opened, and the package 1 is dropped into an outer box (not shown).

  In the present embodiment, a predetermined amount of the contents W is charged from the hopper 11 into the cylindrical body 7 in which the horizontal seal portion 9 that becomes the upper horizontal seal portion 3 and the lower horizontal seal portion 4 is formed in the previous filling step. .

  Next, the ironing roll 15, the first horizontal sealing machine 16, and the second horizontal sealing machine 17 are opened, the feed roll 14 is rotated, and the cylindrical body 7 and the laminated film F subsequent thereto are predetermined together with the packaging body 1x before separation. The length of is extended. The laminated film F fed from the raw roll R is guided to the former 12 through a plurality of feeding rolls 20 and 21, and is curved in a cylindrical shape while passing through the former 12, so that the seal layers 104 are overlapped with each other. A superposed part is formed. And this superposition | polymerization part is heat-welded while passing the vertical sealing machine 13, the vertical seal part 2 by which the inner sides of the laminated film F were sealed integrally is formed, and the continuous cylindrical body 7 is formed. The melting temperature of the base material layer 101 is 250 to 260 ° C., the melting temperature of the intermediate layer 103 is 90 to 100 ° C., and the melting temperature of the seal layer 104 is 110 to 120 ° C. The sealing time is preferably set to 1.4 to 1.5 seconds. As a result, the welding strength between the intermediate layer 103 and the sealing layer 104 can be made higher than the welding strength between the sealing layers 104, and the sealing layer 104 can be easily opened from the welding surface. Further, the seal part 22 formed by welding the seal layers 104 on top of each other can constitute an agglomerated easily peelable seal.

  On the other hand, when the cylindrical body 7 filled with the contents W passes through the ironing roll 15, the ironing roll 15 is closed and the upstream side of the cylindrical body 7 filled with the contents W is ironed and flattened. The ironing part 8 is formed.

  Next, the first horizontal sealing machine 16 and the second horizontal sealing machine 17 are closed, and the downstream side welding region that becomes the upper horizontal sealing part 3 on the downstream side and the upstream side that becomes the lower horizontal sealing part 4 on the upstream side are closed. A lateral seal portion 9 composed of a side welding region is formed to manufacture a package 1x before separation. Even in the upper horizontal sealing and lower horizontal sealing steps, the welding strength between the intermediate layer 103 and the sealing layer 104 is made higher than the welding strength between the sealing layers 104, and it is easy to open from the welding surface between the sealing layers 104. can do. Further, the seal layers 104 are sealed together to form a cohesive peel easy-open seal.

  Next, the press / cutter 18 is closed, and the upstream welding region that becomes the lower lateral seal portion 4 and the downstream welding region that becomes the upper lateral seal portion 3 are the lateral seal portions 9 to which the package 1x before separation is connected. , And the boundary between the two is divided into two by the cutter 18a to manufacture the package 1.

<Operation / Effect of Package 1 of this Embodiment>
Thus, the package 1 of the present embodiment includes the base material layer 101, the buffer layer 102, the intermediate layer 103, and the seal layer 104, and the seal layer 104 is configured to have a higher melting point than the intermediate layer 103, The layer 103 and the seal layer 104 are formed by bending and laminating the laminated film F, which is pseudo-bonded, in a cylindrical shape and welding the seal layers 104 to each other, the upper horizontal seal portion 3, and the lower horizontal seal The vertical seal portion 2, the upper horizontal seal portion 3, and the lower horizontal seal portion 4 constitute an easy-open seal. Thus, the packaging body 1 according to the present embodiment, when opening the packaging body 1, the grip constituting the vertical seal portion 2 is grasped with a finger and the film F is simply pulled to pull the film F. Since the part 22 is peeled off and the vertical seal part 2, the upper horizontal seal part 3 and the lower horizontal seal part 4 can be easily peeled off, the packaging body 1 with good openability can be obtained.

  In addition, since the seal layer 104 of the present embodiment is configured by mixing two or more resins having easy peel suitability to form a cohesive peel easy-open seal, when the package 1 is opened, a vertical seal The portion 2, the upper horizontal seal portion 3, and the lower horizontal seal portion 4 can be easily peeled off.

  In addition, since the seal layer 104 of the present embodiment is configured to include the resin that constitutes the intermediate layer 103 that is pseudo-adhered to the seal layer 104, the adhesive force with the intermediate layer 103 can be improved. As a result, when the package 1 is opened, the seal layer 104 itself can be more easily peeled off than the interface layer between the seal layer 104 and the intermediate layer 103.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

  For example, the packaging body 1 described above is formed using the laminated film F shown in FIG. The laminated film F shown in FIG. 2 (a) has a base material layer 101, a buffer layer 102, an intermediate layer 103, and a seal layer 104. The intermediate layer 103 and the seal layer 104 are pseudo-bonded, and the other layers are bonded. Let me configure. However, the laminated film F shown in FIG. 2 (a) is an example. For example, as shown in FIG. 4 (a), the laminated film F includes a base material layer 101, a buffer layer 102, a first intermediate layer 103, It is also possible to have a configuration in which the second intermediate layer 105 and the seal layer 104 are provided, the intermediate layers 103 and 105 are pseudo-bonded, and the other layers are bonded (welded). Thereby, when an impact is applied, the first intermediate layer 103 and the second intermediate layer 105 are peeled off. Note that the second intermediate layer 105 shown in FIG. 4A can be made of the same resin as the intermediate layer 103 described in the above-described embodiment. In the laminated film F shown in FIG. 4A, for example, the base material layer 101 is made of nylon, the buffer layer 102 is made of polyethylene, and the first intermediate layer 103 and the second intermediate layer 105 are linear low. The seal layer 104 can be made of two or more mixed resins having easy peel suitability. When the laminated film F shown in FIG. 4 (a) is formed using the dry laminating method, the film formed of the base layer 101, the buffer layer 102, the first intermediate layer 103, and the second intermediate layer The laminated film F can be formed by dry laminating 105 and the film composed of the seal layer 104.

  Further, the buffer layer 102 shown in FIG. 2 (a) is eliminated, and as shown in FIG. 4 (b), the base layer 101, the intermediate layer 103, and the seal layer 104 are provided. It is also possible to adopt a configuration in which pseudo-adhesion is performed and other layers are bonded (welded). As a result, when an impact is applied, the intermediate layer 103 and the seal layer 104 are peeled off. In the laminated film F shown in FIG. 4 (b), for example, the base material layer 101 is made of nylon, the intermediate layer 103 is made of linear low density polyethylene, and the sealing layer 104 has two or more easy peel properties. It can be composed of a mixed resin. When the laminated film F shown in FIG. 4 (b) is formed by using the dry laminating method, the film constituted by the base material layer 101, the film constituted by the intermediate layer 103 and the seal layer 104 are dry laminated. Thus, the laminated film F can be formed.

DESCRIPTION OF SYMBOLS 1 Package 2 Vertical seal part 21 Grip part 22 Seal part 3 Upper horizontal seal part 4 Lower horizontal seal part F Laminated film 101 Base material layer 102 Buffer layer 103 Intermediate layer (1st intermediate layer)
104 Sealing layer 105 Intermediate layer (second intermediate layer)

Claims (6)

A laminated film composed of at least three layers of a base material layer, a seal layer, and an intermediate layer that is interposed between the base material layer and the seal layer and is pseudo-adhered to the seal layer. A package formed by curving ,
Has a seal portion in which the sealing layers to each other is heat-welded,
The said sealing layer has a melting point higher than the said intermediate | middle layer, and has an easily openability, The package body characterized by the above-mentioned. The package according to claim 1, further comprising a grip portion at which the seal layers are not thermally welded to each other at an end of the seal portion.   The package according to claim 1 or 2, wherein the sealing layer is made of a resin composition in which two or more resins including the resin constituting the intermediate layer are mixed.   The said intermediate | middle layer consists of a resin composition which mixed two or more resin, The package body of Claim 3 characterized by the above-mentioned.   5. The buffer layer made of a resin having a strength between the base material layer and the intermediate layer is provided between the base material layer and the intermediate layer. 6. The package described in 1.   A laminated film in which at least three layers of a base material layer, a seal layer, and an intermediate layer interposed between the base material layer and the seal layer are laminated, and the seal layer and the intermediate layer are pseudo-bonded The laminated film thus formed is curved into a cylindrical shape, and the seal layers are overlapped with each other and thermally welded to form a seal portion. The seal layer has a melting point higher than that of the intermediate layer and is easily opened. A method for producing a packaging body, comprising forming a packaging body having properties.

Images