JP2015147582A - Packaging bag for refilling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag for refilling with an excellent appearance, the packaging bag having no damaged part at the tip end portion of a V-shaped notch.SOLUTION: A packaging bag for refilling is provided, the bag having a discharging nozzle 8 facing outside at a top corner. The discharging nozzle 8 is composed of a tip top end sealing part 9, a top side sealing part 10, and a bottom side sealing part 11. A V-shaped notch 20 which is a start part for opening the discharging nozzle 8 is formed at the border between the tip top end sealing part 9 and the top side sealing part 10. A tip end portion 21 of the V-shaped notch 20 is formed in an R shape.

Description

  The present invention relates to a refill packaging bag for storing toiletries such as liquid detergents and softeners, and foods such as edible oil and instant coffee.

  As for containers for storing toiletries such as liquid detergents and softeners and foods such as edible oil and instant coffee, dedicated containers having shapes that are easy to use, such as plastic bottles and glass bottles, are used. These dedicated containers have a solid structure and are therefore expensive, so that they can be used repeatedly when the contents are gone. Refillable packaging bags for replenishing the contents of such special containers are sold separately.

  The dedicated container that is used repeatedly is designed so that the contents can be easily poured out. Therefore, the convenience of the refilling operation for replenishing the contents from the refilling packaging bag is not always considered.

  In addition, a refill packaging bag having a spout at the upper corner is generally used so that it can be easily refilled into a dedicated container. For example, the upper corner portion of the packaging bag is cut off with a scissors, or the opening start portion such as a slit or a V-notch is torn to form a spout. In addition, in order to facilitate refilling into a special container, a dispensing nozzle is provided at the upper corner of the packaging bag, and the tip of the nozzle is cut off with a scissors or the nozzle is torn to form a spout. The spout is applied to the mouth of a dedicated container to refill the contents. As such a refill packaging bag, there is a self-supporting packaging bag 50 as shown in FIG. The refill packaging bag 50 is provided with a dispensing nozzle 8 at the upper corner, and the dispensing nozzle 8 is formed of a tip seal portion 9, an upper seal portion 10 and a lower seal portion 11, and the tip seal. A V-shaped cut 20 is formed at the boundary between the portion 9 and the upper seal portion 10. A cutting guide wire 23 for opening the dispensing nozzle is formed at the cut end 21.

  In general, the V-shaped cut 20 is generally formed by punching using a Thomson blade. In order to form the V-shaped cut end 20, it is difficult to bend and form one blade, and the tips of the two Thomson blades 45, 45 are as close as possible to each other, and the two Thomson blades facing each other face each other Each side to be cut is shaved so that the front end of the cut has an acute V shape. The explanatory diagram is shown in FIG. However, in the current state, the tip portion formed by the two Thomson blades 45 and 45 has a gap 40 of about 0.1 mm. Since the cut end is inevitably discontinuous, there is a problem in that a damaged portion (peeling) occurs when the laminated sheet is caught at the front end during punching. For example, as shown in FIG. 7A, if the laminated sheet 30 constituting the packaging bag is such that a base material layer 31 having a printed layer 32 and a sealant layer 34 are laminated via an adhesive layer 33. The printed layer 32 between the base material layer 31 and the sealant layer 34 is peeled off at the cut end 22 at the cut end, and a peeled portion 37 is generated, which may cause a damaged portion. Furthermore, the peeled portion 37 may be chained to the half cut portion 24 that forms the cutting guide wire connected to the front end portion of the cut end and peeled off from the cutting guide wire, resulting in a damaged portion. Further, as shown in FIG. 7-2, for example, a laminated sheet composed of a base layer 31 / printing layer 32 / adhesive layer 33 / a film 35 having an aluminum vapor deposition layer / adhesive layer 33 / sealant layer 34 is aluminum. There is a problem that the vapor deposition layer 36 is peeled off from the base material layer, and a peeled portion 37 is generated, resulting in a damaged portion. That is, as shown in FIG. 8, the peeled portion 37 is linked to the half cut portion 24, and a damaged portion 38 is generated, which may impair the appearance.

  In order to improve such a problem, there is a proposal of a packaging bag in which a spout can be easily opened by hand (Patent Document 1). By providing a notch portion on each of the one side and the upper side, a dispensing nozzle is formed at the corner portion, and the notch portion is closest to the dispensing direction center line of the dispensing nozzle. In the vicinity of the end edge portion, a slit or a notch made of a slit or notch is provided as an opening start portion for opening the dispensing nozzle. The leading end of the cut is connected to the half-cut line.

  These cut edges are formed by punching using a Thomson blade or the like, and are semi-circular, I-shaped, V-shaped or other notches or slits, and are formed by cutting in addition to the notches. Among them, semicircular notches having a radius of curvature R of 2 mm, 4 mm, and 6 mm are formed as cut edges, and a 1 mm cut is formed at the tip. Certainly, it can be opened smoothly by hand, but there is a problem that the cut is damaged by handling during distribution or storage.

  Therefore, there is a demand for a refillable packaging bag having a good appearance without a damaged portion at the tip of the V-shaped cut end.

JP 2001-213448 A

  The present invention has been made in view of the background art as described above, and is to provide a refillable packaging bag having a good appearance without a damaged portion at the tip of the V-shaped cut end.

  In order to solve the above-mentioned problems, the inventors have conducted intensive studies and completed the present invention.

The invention according to claim 1 of the present invention is a refill packaging bag having a nozzle for pouring outward in an upper corner portion,
The dispensing nozzle is formed of a tip seal portion, an upper seal portion, and a lower seal portion,
At the boundary between the tip seal part and the upper seal part, a V-shaped cut opening that is a start part for opening the dispensing nozzle is formed,
The refill packaging bag is characterized in that a cut end portion of the V-shaped cut is formed in an R shape.

  The invention according to claim 2 of the present invention is the refill packaging bag according to claim 1, wherein the R shape has a radius of curvature R of 0.8 mm.

  The invention according to claim 3 of the present invention is the refill packaging bag according to claim 1 or 2, wherein the V-shaped cut end is formed by using a single Thomson blade.

  Invention of Claim 4 of this invention is connected with the cutting | disconnection guide line which crosses the nozzle for extraction for the said cut end tip part, It is any one of Claims 1-3 characterized by the above-mentioned. This is a refill packaging bag.

  The refill packaging bag according to the present invention has a V-shaped cut end having an R-shape, so that the end has no damaged portion and has a good appearance.

  In addition, since the cutting edge tip is formed with a radius of curvature R of 0.8 mm, it can be bent with a single Thomson blade, and can be punched in a state where the blade is continuous, and there is no damaged portion. For example, the printed layer and the aluminum vapor deposition layer are peeled off from the base material layer, and the base material layer and the sealant layer are not peeled off. Moreover, there is no chain peeling to the cutting guide wire connected to the front end of the cut end, and a refillable packaging bag having a good appearance can be obtained.

  Moreover, it can be torn along a cutting | disconnection guide line because the cutting edge front-end | tip part is connected with the cutting | disconnection guide line which crosses the extraction nozzle. The dispensing nozzle can be cut and opened smoothly by hand.

It is explanatory drawing which shows an example of the packaging bag for refilling concerning this invention. It is explanatory drawing which shows the upper corner part of FIG. It is explanatory drawing which shows an example of the V-shaped Thomson blade of this invention. It is explanatory drawing which shows an example of the cross section of the lamination sheet of a V-shaped cut end. It is explanatory drawing which shows an example of the conventional packaging bag for refilling. It is explanatory drawing which shows an example of the conventional V-shaped Thomson blade. It is explanatory drawing which shows an example of the cross section of the lamination sheet of the V-shaped cut end of FIG. It is explanatory drawing which shows the upper corner part of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described.

  FIG. 1 is an explanatory view showing an example of a refill packaging bag according to the present invention. The refill packaging bag 1 is an example of a self-supporting packaging bag. It is a packaging bag for refilling which has the nozzle 8 for extraction in the outward direction in an upper corner part. It consists of two laminated sheets 2 and 3 and a bottom tape 4. The front and back laminated sheets 2 and 3 and the bottom tape 4 are flexible sheets. The bottom tape 4 is inserted between the lower parts of the front and back laminated sheets 2 and 3 while being folded, the bottom is sealed, the bottom seal 5 is sealed, and both sides are sealed to form the side seals 6 and 6, respectively. . The dispensing nozzle 8 includes a tip seal portion 9, an upper seal portion 10, and a lower seal portion 11, and the upper seal portion 10 is connected to the tip seal portion 9 and the top opening 14. The lower seal portion 11 is connected to the tip seal portion 9 and the left side seal portion 6.

The dispensing nozzle 8 is formed of a tip seal portion 9, an upper seal portion 10, and a lower seal portion 11. A V-shaped cut opening 20 serving as an opening start portion for opening the dispensing nozzle 8 is formed at the boundary between the tip seal portion 9 and the upper seal portion 10, and the cut end portion 21 is formed in an R shape. Further, the cut end portion 21 is connected to a cutting guide wire 23 for opening the dispensing nozzle. A plurality of cutting guide lines are formed.
FIG. 2 is an explanatory view showing the upper corner 12 of FIG. The V-shaped cut 20 will be described in more detail. The V-shaped cut end 20 is formed at the boundary between the upper seal portion 10 and the tip seal portion 9, and the cut end tip portion 21 is formed with a curvature radius R of 0.8 mm. The V-shaped cut is formed using a single Thomson blade.

FIG. 3 is an explanatory view showing an example of the V-shaped Thomson blade of the present invention. One Thomson blade 45 is bent into a V shape, and the tip of the cut end is formed into an R shape. In particular, the cut end 21 is formed with a radius of curvature R of 0.8 mm. The front end of the cut end has an acute angle when the radius of curvature R is 0.8 mm, and no damaged portion is generated at the front end of the cut end. Further, since a plurality of cutting guide wires 23 for opening the dispensing nozzle are connected to the cut end portion 21, tearing from the V-shaped cut portion at the opening start portion, and for dispensing along the cutting guide line The nozzle can be opened.

  FIG. 4 is an explanatory view showing an example of a cross section of a laminated sheet having a V-shaped cut end. FIG. 4A shows an example of a laminated sheet 30 in which at least a base material layer 31 having a print layer 32 and a sealant layer 34 are laminated via an adhesive layer 33. The right edge indicates the cut end of the V-shaped cut and indicates the cut 22. Since the cut end 22 is formed with a curvature radius R of 0.8 mm, a damaged portion such as peeling of the print layer 32 does not occur at the tip, and a good appearance can be obtained. In addition, a half-cut portion 24 that forms a cutting guide wire is connected to the cut end 22. The half cut portion 24 is formed by half cut so as to penetrate the base material layer 31 and reach the sealant layer 34. 4B illustrates an example of a laminated sheet 30 in which a base material layer 31 having a printed layer 32, a film 35 having an aluminum vapor deposition layer, and a sealant layer 34 are laminated with an adhesive layer 33 interposed therebetween. A broken portion such as peeling of the printed layer 32 and the aluminum vapor deposition layer 36 does not occur at the cut end 22 at the tip, and a good appearance can be obtained. The half cut portion 24 is formed by half cut so as to penetrate the base material layer 31 and the film 35 having an aluminum vapor deposition layer and reach the sealant layer 34. It can be torn along the cutting guide line using the cut opening 22 as an opening start portion, and the dispensing nozzle can be opened.

  Furthermore, the form for implementing this invention is demonstrated in detail.

  The refill packaging bag 1 of the present invention can be a three-sided seal type packaging bag or a gusset type packaging bag in addition to the self-supporting packaging bag depending on the capacity and design of the contents. This is possible as long as it has a nozzle for pouring outward at the upper corner of the packaging bag and has a V-shaped cut.

  As the base material layer 31, a plastic film, paper, a nonwoven fabric, etc. can be used. Examples of the plastic film include polyester film, polypropylene film, polystyrene film, nylon film, polycarbonate film, polyacrylonitrile film, and polyimide film. There is no particular limitation as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. Moreover, what provided the aluminum vapor deposition layer in these films may be used.

  As the paper, high-quality paper, piece art paper, coated paper, cast coated paper, imitation paper, and the like can be used. What is necessary is just to determine suitably from mechanical strength or bag making appropriateness.

  Moreover, the base material layer 31 can be appropriately provided with a print layer as necessary. The printing layer 32 is a layer composed of ink obtained by adding various pigments, extender pigments, plasticizers, drying agents, stabilizers, etc. to binder resins such as urethane, acrylic, nitrocellulose, and rubber. is there. Characters, designs, etc. can be formed by this print layer. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexographic printing, silk screen printing, and ink jet printing can be used. Moreover, the adhesiveness of a printing layer can be improved by performing the corona treatment or the ozone treatment on the surface of a base material layer as a pretreatment beforehand.

As the sealant layer 34, a polyolefin resin is generally used, and specifically, a low density polyethylene, a linear low density polyethylene, a medium density polyethylene, a high density polyethylene, an ethylene-vinyl acetate copolymer (EVA). Films made of polyolefin resins such as ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ionomer, and polypropylene can be used. These resins can be formed into a film by an extruder. It may be a single layer or multiple layers. The thickness of the film is preferably in the range of 10 to 100 μm, more preferably in the range of 15 to 70 μm.

  As the adhesive layer 33, an adhesive for dry lamination can be used. For example, a two-component curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, and the like can be used. . As a bonding method, a dry lamination method is possible.

  Further, if it is necessary to improve various physical properties of the laminated sheet, for example, an intermediate layer can be provided in order to improve the rigidity, drop strength, piercing strength, etc. of the laminated sheet.

  As the intermediate layer, for example, a nylon film or a polyethylene terephthalate film can be used to improve the drop strength or the piercing strength, and an aluminum foil or aluminum vapor deposition can be used to improve the water vapor barrier property. A polyester film, an inorganic oxide-deposited polyester film, or the like can be used. Moreover, in order to improve the cosmetics, a film having an aluminum vapor deposition layer can be used. Moreover, in order to laminate | stack an intermediate | middle layer, it can bond together by the dry lamination method through an contact bonding layer.

  As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide can be used. . Of these, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable from the viewpoint of productivity and price.

  The V-shaped cut end can be obtained by bending a single Thomson blade and setting the cut end to a radius of curvature R of 0.8 mm so that the cut end does not have a damaged portion. Good appearance can be obtained. If the curvature radius R of the cut end is less than 0.8 mm, there is a problem that it is difficult to bend and that the blade is broken at the time of punching. Moreover, when the curvature radius R becomes larger than 0.8 mm, it goes in the direction where the tearability from the cut end is lowered. Therefore, when the radius of curvature R is 0.8 mm, it is possible to bend with a single blade and to obtain a punched tip without a damaged portion. For example, the Thomson blade has a thickness of 0.7 mm, which is generally used, the edge shape can be a center blade, and the blade edge angle can be 30 ° or 43 °. A blade with a blade edge angle of 58 ° is also possible. A V-shaped cut can be formed by a punching machine using a Thomson blade. Usually, the punching may be performed at the same time as the outer shape of the packaging bag, or after the outer shape is punched, it may be performed in a separate process. It is also possible to use a die having a punching die in the press die without using a Thomson blade.

  Moreover, the cutting guide wire 23 is formed from a half-cut portion provided continuously on the front and back laminated sheets. The depth of the cutting guide wire is formed by penetrating the base material layer and half-cutting the surface of the sealant layer. Further, when the intermediate layer is laminated on the laminated sheet, it is formed by penetrating the base material layer and the intermediate layer and half-cutting to the surface of the sealant layer. Since the cutting guide wire is connected from the tip of the V-shaped cut end and is formed across the extraction nozzle, when opening the dispensing nozzle, pick the tip seal portion and the upper seal portion, The spout can be formed by tearing along the cutting guide line from the front end of the cut end.

  The cutting guide wire 23 can be formed by a method using a Thomson blade or a method using a laser, but a method using a laser is preferable because a half cut can be performed uniformly. Note that one or a plurality of cutting guide lines are possible. As the type of laser, a carbon dioxide laser is preferable.

  The refill packaging bag according to the present invention has a V-shaped cut end with a radius of curvature R of 0.8 mm. Is possible. Moreover, since the front-end | tip part of a cut end is connected with the cutting | disconnection guide wire, the nozzle for extraction can be smoothly opened by hand.

  Hereinafter, specific examples of the present invention will be described.

  A printing layer was provided on the inner surface of the stretched nylon film 15 μm using gravure ink. Printing was performed by gravure printing.

  The printing surface of the nylon film and a polyester film 12 μm having an aluminum vapor deposition layer were bonded together by a dry laminating method via a two-component curable urethane adhesive.

  Next, 100 μm of linear low density polyethylene film (LLDPE) was bonded to the polyester film surface by a dry laminating method through a two-component curable urethane adhesive. A laminated sheet was created. The layer structure of the laminated sheet is a stretched nylon film / printing layer / adhesive / aluminum vapor-deposited polyester film / adhesive / linear low-density polyethylene film.

  Next, the laminated sheet was slit into a two-sided laminated sheet and a bottom tape with a predetermined width, and three cutting guide lines were formed by a carbon dioxide laser at a desired position on the two laminated sheets. Next, the bottom tape was sandwiched between the lower portions of the two front and back laminated sheets on the bag making machine, and the bottom and both sides were sealed to form a bottom seal portion and a side seal portion, respectively. Next, the top part was sealed to form a top seal part. A self-supporting packaging bag having an internal volume of 360 ml was formed. At this time, a Thomson blade was used, and a punching machine was used to form a dispensing nozzle formed of a tip seal portion, an upper seal portion, and a lower seal portion at the upper left corner as shown in FIG. . Further, a V-shaped cut opening for opening the dispensing nozzle was formed at the boundary between the tip seal portion and the upper seal portion, and the curvature radius R was formed to 0.8 mm at the cut tip end portion. The cutting guide wire formed in advance was connected to the front end of the cut end and formed across the dispensing nozzle.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
A self-supporting packaging bag was produced in the same manner as in Example 1 except that the front end portion of the cut end was not rounded, that is, formed by a method using a conventional Thomson blade as shown in FIG.

<Evaluation method 1>
At the time of punching, the presence or absence of a damaged part such as peeling of the laminated sheet at the end of the cut edge was confirmed. One hundred self-supporting packaging bags were evaluated. In 100 bags, there was no broken part. Among 100 bags, even one bag had a broken part, and was marked as x.

  The evaluation results are shown in Table 1.

切り口先端部を、曲率半径Ｒが０．８ｍｍにすることにより、打抜き加工時に、積層シートの層間で剥がれなどの破損部がなく、外観が良好であった。しかし、切り口先端部が、Ｒ形状なしのものは、３袋に破損部が観られた。

By setting the curvature radius R to 0.8 mm at the front end of the cut end, there was no damaged part such as peeling between the layers of the laminated sheet during punching, and the appearance was good. However, in the case where the cut end has no R shape, the damaged portion was observed in three bags.

<Evaluation method 2>
The tearability of the cutting guide wire was evaluated by a tensile testing machine. The tip seal part and the upper seal part were each picked with a jig, pulled along the cutting guide line, and the tensile strength (N) when the cutting guide line was torn was measured. The number of samples was 7 bags each.

  The evaluation results are shown in Table 2.

切り口先端部が、曲率半径Ｒが０．８ｍｍ、Ｒ形状がないものでも、引っ張り強度の差がなく、切断誘導線をスムースに引き裂き注出用ノズルを開封できた。注出口を形成できた。

Even when the cutting edge tip had a radius of curvature R of 0.8 mm and no R shape, there was no difference in tensile strength, and the cutting guide wire was torn smoothly and the dispensing nozzle could be opened. A spout could be formed.

DESCRIPTION OF SYMBOLS 1 ... Packing bag 2 for refilling ... Front laminated sheet 3 ... Back laminated sheet 4 ... Bottom tape 5 ... Bottom seal part 6 ... Side seal part 7 ... Opening part 8 ··· Nozzle for dispensing 9 ··· Sealing tip 10 ··· Upper sealing portion 11 ··· Lower sealing portion 12 · · Upper corner portion 20 · · V-shaped cut 21 · · Cut tip 22 · · Cut 23 ·· Cutting guide wire 24 ·· Half cut portion 30 ·· Laminated sheet 31 ·· Base material layer 32 ·· Print layer 33 ·· Adhesive layer 34 ·· Sealant layer 35 · · Film 36 having an aluminum deposited layer ·· Aluminum Vapor deposition layer 37 .. peeled portion 38 .. damaged portion 40 .. gap 45 .. Thomson blade 50 .. conventional refill packaging bag

Claims (4)

In the refill packaging bag having the dispensing nozzle in the outer direction in the upper corner,
The dispensing nozzle is formed of a tip seal portion, an upper seal portion, and a lower seal portion,
At the boundary between the tip seal part and the upper seal part, a V-shaped cut opening that is a start part for opening the dispensing nozzle is formed,
The refillable packaging bag, wherein the front end portion of the V-shaped cut end is formed in an R shape.   2. The refill packaging bag according to claim 1, wherein the R shape has a curvature radius R of 0.8 mm.   The refill packaging bag according to claim 1, wherein the V-shaped cut end is formed by using a single Thomson blade.   The refill packaging bag according to any one of claims 1 to 3, wherein the cut end portion is connected to a cutting guide wire that traverses the dispensing nozzle.

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