JPH0745212B2 - Method for manufacturing a package having a piercing part - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention seals and fills contents such as beverages, pierces a straw when the contents are taken out, and inserts the tip into the contents such as beverages filled inside. The present invention relates to a method for producing a package having a straw piercing portion adapted to take out contents through the straw.

Conventional technology Conventionally, while filling beverages such as juice in a sealed manner,
When taking out the beverage filled inside, pierce the straw from the straw piercing part formed on the surface of the packaging bag body, insert the straw tip into the beverage inside and suck out the beverage from the straw without opening the packaging bag Known packaging bags are

Conventionally, as a method of manufacturing a packaging bag having such a straw puncture portion, a heat sealant layer is formed on one side of an aluminum foil shown in JP-A-60-89365, and a plastic film is formed on the other side. Using laminated materials that are laminated,
By irradiating the plastic film surface with a carbon dioxide laser through a mask and a focusing lens, a straw hole is formed, and a through hole is formed in the wall of the packaging bag shown in No. 57-86966 by a hot needle. After that, a method of thermocompression-bonding the portion to melt and seal the hot-melt resin and a method of sticking a surface material having a through-hole formed in advance by using an adhesive are known.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the conventional method for forming the straw piercing portion described above is the method of JP-A-60-89365, in which the odor is intense due to the burning of the film by laser irradiation, and the laser There is a problem that the strength of the film becomes brittle due to heat from irradiation, and the method of Japanese Utility Model Laid-Open No. 57-86966 has a problem in bag safety because a through hole is formed in the bag body. Further, in the method of sticking the surface material in which the through holes are formed in advance by using an adhesive, the adhesive exudes from the through holes to the outside at the time of sticking, and the residue left after the through holes are formed on the web. There is a problem in that it may be mixed into the product and may be mixed in the product, and since the through hole is formed in the web, it becomes brittle and may be cut during processing.

The present invention has been made in order to improve the above circumstances, and provides a method for manufacturing a packaging material having a straw piercing portion capable of easily and surely forming a straw piercing portion and facilitating straw piercing. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention provides a metal foil on the back surface of a surface layer having a single-layer structure made of a plastic material or a multilayer structure in which a plurality of plastic materials are laminated via an adhesive. An intermediate layer made of is laminated with an adhesive, and an inner layer made of a plastic material is laminated on the back surface of the intermediate layer to form a composite material, and a straw piercing part is formed on the surface layer to produce a package. In the method, a composite material is used in which an adhesion-inhibiting layer is formed in a part between the adhesive layer on the outermost surface side of the adhesive layer and the plastic material layer laminated on the surface side of the adhesive layer. The layer and the portion of the plastic material layer on the surface side facing the adhesion-inhibiting layer are removed from the adhesive layer on the outermost surface side, and the removed portion is used as a straw puncture portion.

In this case, as the plastic material forming the inner layer,
Examples include polyethylene, polypropylene, and ethylene-vinyl acetate copolymer, which can be a single layer or multiple layers, but when manufacturing a package by heat sealing, the innermost layer is formed of a heat adhesive resin. Preferably. The thickness of the inner layer is not particularly limited, but is 20 to 150.
It is preferable that the thickness is μm, particularly 40 to 120 μm.

In addition, examples of the metal foil forming the intermediate layer include aluminum foil, and the thickness thereof is preferably 5 to 15 μm.

Further, as the plastic material forming the surface layer, a puncture-resistant material such as polyester such as polyethylene terephthalate, polyamide, cellophane or polyethylene,
Examples include stretched films of polypropylene and the like, and a single-layer or multi-layer structure of these is possible. Its thickness is
The thickness is preferably 10 to 150 μm, particularly preferably 30 to 80 μm.
In the case of a multi-layered structure, it is preferable that each plastic material layer be adhered with an adhesive.

Further, the adhesion-inhibiting layer may be formed by a method of applying a coating material having a peeling property such as silicone by a printing method.

Here, as a method for removing the adhesion-inhibiting layer and the portion of the plastic material layer facing the adhesion-inhibiting layer, a method such as die cutting, laser cutting, or laser beam is adopted. Further, the size of the adhesion-inhibiting layer, that is, the size of the straw piercing portion can be about 1 to 5 mm in diameter, and can be formed in an appropriate shape such as a circle or an ellipse.

Action According to the method for producing a package having a straw puncture portion of the present invention, a part of the adhesive layer between the adhesive layer on the outermost surface side and the plastic material layer laminated on the surface side of the adhesive layer Using a composite material having an adhesion-inhibiting layer, the adhesion-inhibiting layer and the adhesion-inhibiting-layer facing portion of the plastic material layer present on the surface side thereof are removed from the adhesive layer on the outermost surface side,
Since the adhesion inhibiting layer does not adhere to the adhesive because the removed portion is the straw piercing portion, when removing the plastic material surface layer of the portion facing the adhesion inhibiting layer,
The facing portion of the adhesion-inhibiting layer and the adhesion-inhibiting layer can be easily removed from the adhesive layer underneath by simply cutting the peripheral portion of the surface layer facing the adhesion-inhibiting layer, and the straw puncture can be carried out very easily and efficiently. A ridge can be formed, and
Since part or all of the surface layer of the formed straw piercing portion is removed, the straw piercing can be easily performed.

An embodiment of the present invention will be described below with reference to the drawings.

Example FIGS. 1 and 2 each show an example of a composite material used for producing a package according to the present invention. The composite material 1 includes an inner layer 2 made of a plastic material and an intermediate layer made of a metal foil. 3. A surface layer 4 made of a plastic material is formed, and an adhesion-inhibiting layer 5 is formed at a predetermined position on the surface layer 4, and the surface layer 4 is adhered to the intermediate metal foil layer 3 by an adhesive 6. The inner layer 2 and the intermediate metal foil layer 3 are also bonded to each other with an adhesive 7.

Here, as the plastic material forming the inner layer, a heat-adhesive resin such as polyethylene, polypropylene, or ethylene-vinyl acetate copolymer is suitable for the innermost layer when heat sealing needs to be performed when manufacturing the package. Used for. Although the inner layers in FIGS. 1 and 2 show a single-layer structure made of one kind of plastic material, they may have a multi-layer structure made of two or more kinds of plastic materials. The inner layer is usually formed to a thickness of 20 to 150 μm, particularly 40 to 120 μm.

The intermediate metal foil layer is usually 5 to 15 depending on aluminum foil or the like.
It is formed to a thickness of μm.

Examples of the plastic material for the surface layer include straw puncture resistant materials such as polyester such as polyethylene terephthalate, polyamide, cellophane, and stretched film such as polyethylene and polypropylene. These single layers (FIG. 1) or A multi-layer (FIG. 2) structure can be used. The thickness of the surface layer is not particularly limited, but 10 to
It is preferably 150 μm, more preferably 30 to 80 μm.

Here, in the composite material 1 shown in FIG. 1, the composite material 1 in which the adhesion inhibiting layer 5 is formed on a part of the back surface of the surface layer 4 is used, and the multilayer material shown in FIG. In FIG. 2, in the composite material 1 having the surface layer 4 of the two-layer 4a, 4b structure, the back surface of the upper layer 4a, that is, the composite material 1 has the upper layer 4a and the lower layer 4b bonded by the adhesive 8. Further, the lower layer 4b and the intermediate metal foil layer 3 are adhered to each other by the adhesive 6, but the adhesion-inhibiting layer 5 is formed on a part of the back surface of the upper layer 4a existing on the front surface side of the outermost adhesive layer 8. The composite material 1 formed with is used. In this case, the adhesion-inhibiting layer can be formed by a paint having a peeling property, such as a silicone-based paint, and the adhesion-inhibiting layer can be formed by a printing method or the like. The shape and size of the adhesion-inhibiting layer are not necessarily limited, but the diameter is 1 to 5 mm.
It is suitable to have a circular shape.

In addition, the composite material used in the present invention is obtained by adhering the surface layer and the intermediate metal foil layer with an adhesive as described above, and in the case of further having a surface layer having a multilayer structure, adhering the plastic materials of the surface layer to each other. The adhesive is made of an adhesive, and as the adhesive, an isocyanate adhesive, a urethane adhesive, or molten polyethylene can be used. In this case, the adhesion-inhibiting layer formed on the surface layer does not adhere to the adhesive, so that the part of the surface layer facing the adhesion-inhibiting layer is in an unbonded state with the lower material. The inner layer can be formed by an extrusion laminating method. Therefore, in this case, it is not necessary to interpose an adhesive between the inner layer and the intermediate metal foil layer as in the illustrated composite material.

Thus, in the present invention, when a package is manufactured using the composite material as described above, as shown in FIGS. 1 and 2, it may be prepared by an appropriate method such as a die cutting method, a laser cutting method or a method using a laser beam. A peripheral edge 4 ″ of the adhesion inhibiting layer facing portion 4 ′ of the surface layer 4 is cut, and the facing portion 4 ′ and the adhesion inhibiting layer 5 formed on the back surface thereof are shown in FIG. 3 in the case of the composite material of FIG. As shown, and in the case of the composite material of Figure 2, it is removed as shown in Figure 4. In this case, since the adhesion-inhibiting layer 5 is not adhered to the adhesive 6 or 8, the surface layer 4 The adhesion inhibiting layer facing portion 4 ′ and the adhesion inhibiting layer 5 are peeled and removed simply and surely only by cutting the peripheral edge portion 4 ″ of the adhesion inhibiting layer facing portion 4 ′. In particular, when a uniaxially stretched film is used as the constituent material of the surface layer, particularly when a stretched film is used as the lower layer 4b of the surface layer 4 composed of upper and lower layers 4a and 4b as shown in FIG. When a high temperature cutting method using a laser beam or the like is adopted to remove the adhesion inhibiting layer 5,
When the film is cut, the stretched film shrinks due to heat, and as a result, it spontaneously peels off from the adhesive, making it very easy to remove the adhesion-inhibiting layer facing part of the surface layer and the adhesion-inhibiting layer. It becomes easier to stab straws.

The part of the surface layer facing the adhesion-inhibiting layer and the part from which the adhesion-inhibiting layer is removed become the straw piercing part 9. The composite material 1 in which the straw piercing part 9 is formed is the package to be manufactured. A package is manufactured according to a conventional method according to the type of body. For example, when manufacturing the packaging bag 10 as shown in FIG. 5, a composite material having a straw piercing portion and a composite material having the same structure except that the straw piercing portion is not formed are overlapped, It can be manufactured by heat-sealing 11 both side edges and the lower edge, then containing the contents inside, and finally heat-sealing 12 the upper edge. In this case, a method of folding back the composite material having the straw piercing part, heat-sealing one side open edge part and the lower edge part, and heat-sealing the upper edge part after accommodating the contents can also be adopted. .

In the above description, the package is manufactured using the composite material having the straw piercing portion.
After the package is manufactured using the composite material shown in FIG. 2, the straw-piercing portion may be formed by removing the adhesion-inhibiting layer facing portion and the adhesion-inhibiting layer of the surface layer. Further, other configurations may be variously modified without departing from the scope of the present invention.

That is, the removal of the adhesion-inhibiting layer portion can be easily removed in any of the steps of laminating the surface material and the aluminum foil, the step of laminating the heat sealant of the innermost layer, and the bag-making step. The removal is performed by intermittent driving instead of continuous driving, which is extremely preferable in terms of manufacturing and technology.

Next, specific examples of the present invention will be shown.

〔Concrete example〕

A 12-micron-thick polyester film was coated with a peelable silicone resin as an adhesion-inhibiting layer-forming material by a gravure coating method, and a 40-micron-thick uniaxially stretched polyethylene film was coated on the coated surface using an isocyanate-based adhesive. The layers were laminated to form a surface layer.

Next, a 9-micron-thick aluminum foil was similarly adhered and laminated using an isocyanate adhesive, and a 100-micron-thick low-density polyethylene film was extruded as a heat sealant layer to form a composite material by laminating.

Two pieces of this composite material are used to bring the low-density polyethylene film surfaces together, insert the bottom-forming material of the same construction into the bottom portion of the packaging bag, and heat-bond the necessary peripheral side edges for self-supporting. In the process of making a bag, the adhesion-inhibiting layer portion formed on the polyester film was cut and removed from the outside of the packaging bag by a die cutting method to form a straw puncture portion. After that, the self-supporting bag was filled with water and the straw was pierced through the straw piercing portion, but the straw could be easily inserted.

EFFECTS OF THE INVENTION As described above, according to the method of the present invention, it is possible to easily and efficiently form a straw piercing portion, and therefore, it is an excellent method for producing a package having a straw piercing portion. Since the formed straw piercing part has part or all of the surface layer removed, the straw piercing is easily performed.

[Brief description of drawings]

1 and 2 are partially omitted cross-sectional views of the composite material used in the manufacturing method of the present invention, and FIGS. 3 and 4 are partially omitted of the composite material with a straw piercing portion formed therein. A sectional view and FIG. 5 are plan views of a packaging bag manufactured using the same composite material. 1 ... Composite material, 2 ... inner layer, 3 ... intermediate layer, 4 ... surface layer, 5 ... adhesion-inhibiting layer, 6,7,8 ... adhesive, 9 ... straw piercing part, 10 ... … A packaging bag.

Claims (1)

[Claims] 1. An intermediate layer made of a metal foil is laminated with an adhesive on the back surface of a surface layer having a single-layer constitution made of a plastic material or a multilayer structure in which a plurality of plastic materials are laminated with an adhesive. In the method for producing a package formed of a composite material in which an inner layer made of a plastic material is laminated on the back surface of the intermediate layer, and having a straw piercing part formed on the surface layer, the outermost surface side of the adhesive layer is formed. A composite material in which an adhesion-inhibiting layer is formed in a part between the adhesive layer and the plastic material layer laminated on the surface side thereof is used, and the adhesion-inhibiting layer and the plastic material layer existing on the surface side thereof are used. A method for producing a package having a straw piercing part, characterized in that a portion facing the adhesion-inhibiting layer is removed from the adhesive layer on the outermost surface side, and the removed portion is used as a straw piercing part.