JP6349923B2 - Self-supporting packaging bag - Google Patents

Description

  The present invention relates to a self-supporting packaging bag for refilling, and more particularly to a self-supporting packaging bag that stores a large-capacity content of 900 ml or more.

  2. Description of the Related Art Conventionally, a self-supporting packaging bag called a standing pouch is generally used as a refill packaging bag for storing contents such as liquid and powder. This self-supporting packaging bag is formed by sealing the bottom sheet by folding the bottom sheet at the bottom of the body sheet made of a flexible sheet, and sealing both sides of the body sheet to form side seal parts, Next, the top part is sealed to form a top seal part. The contents are stored in a space formed by the trunk sheet and the bottom sheet. Moreover, what has a spout in an upper corner part is common.

  However, since the contents of the packaging bag are liquid or powder, the side seal part is bent at the time of display, the shape of the packaging bag is broken and the appearance is deteriorated, and the packaging bag is bent at the time of dispensing. There is a problem that is difficult to issue. In addition, there is also a problem that the packaging bag is bent and deformed when stored in a state where the contents are reduced.

  In order to improve such a problem, the proposal which improves the independence of a packaging bag is made. There is a proposal in which one of the body sheets constituting the packaging bag is made self-supporting by using a highly rigid paper sheet having heat-fusibility (Patent Document 1). Moreover, it is a proposal which forms the side seal part of a packaging bag wide, raises the rigidity of a packaging bag, and improves self-supporting property (patent document 2). Moreover, there is a proposal in which a rib is provided over the entire length in the longitudinal direction of the side seal portion of the self-supporting packaging bag (Patent Document 3). In addition, there is a proposal in which an air sealing portion is provided in a side seal portion of a self-supporting packaging bag (Patent Document 4).

  Recently, there are an increasing number of products whose contents for refilling have a large capacity of 900 ml or more. For example, liquid clothes detergents and bleaching agents have a large capacity of about 2800 ml. For these large-capacity packaging bags, there is a need for packaging bags that are self-supporting and that do not bend even when poured, and that can be poured stably.

  The provision of independence can also be achieved by the above proposal, but the ease of pouring into the bottle makes it difficult to hold the packaging bag, and there is a problem in stably pouring out. Due to the large capacity, there is a problem that it is heavy in terms of weight and difficult to pour out stably by sliding from the hand.

  Accordingly, there is a need for a refillable self-supporting packaging bag for storing a large volume of contents, which has self-supporting properties and can be stably poured out at the time of dispensing (at the time of refilling).

Japanese Utility Model Publication No. 6-85243 JP-A-6-122456 Japanese Patent Laid-Open No. 11-193038 JP 2001-270533 A

In view of the problems of the background art as described above, the present invention is a self-supporting packaging bag for refill having a capacity of 900 ml or more, has self-supporting property, and is stable at the time of dispensing (at the time of refilling). It is to provide a packaging bag that can be poured out.

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

In the invention according to claim 1 of the present invention, the bottom sheet is folded inward at the lower part of the body sheet arranged opposite to each other, and a bottom seal part sealed with the body sheet is formed, and both sides are sealed In the self-supporting packaging bag in which the seal part and the top part are sealed and the top seal part is formed, and the cap has a cap and a mouth part in the upper corner part.
In the side seal portion facing the plug, an air-sealed portion is formed in the longitudinal direction,
And, on the front side and the back side of the bottom sealing portion which faces the spout, it is self-supporting packaging bag characterized by comprising forming each cut portion can be inserted a finger at a position facing each other.

  The invention according to claim 2 of the present invention is the self-supporting packaging bag according to claim 1, wherein the length of the major axis of the cut portion is 20 mm or more.

  In the invention according to claim 3 of the present invention, the trunk sheet and the bottom sheet are each composed of a laminated sheet composed of a plurality of layers, and at least one of the plurality of layers is vapor-deposited with an aluminum foil or an inorganic oxide. 3. The self-supporting packaging bag according to claim 1, wherein the self-supporting packaging bag is a polyester film.

In the self-supporting packaging bag of the present invention, an air-sealing portion is formed in the longitudinal direction in the side seal portion facing the plug, and the front side and the back side of the bottom seal portion facing the plug are opposed to each other. a position, that by forming a cut portion of a finger can be inserted, respectively, have a self-supporting, and is one that can be output stably Note. The content volume is 900 ml or more, has a self-supporting property, and can be stably poured out.

  Moreover, by providing the air sealing part in the longitudinal direction in the side seal part facing the plug, the packaging bag is not bent at the time of pouring and can be poured out. In addition, the shape of the packaging bag is not lost even when it is displayed or stored with the content being reduced.

  In addition, by providing a notch that allows the finger to be inserted into the bottom seal that faces the spigot, when pouring out, the finger can be inserted into the notch and hooked to hold the bottom of the packaging bag. And can be poured out.

  For example, the finger of one hand is inserted into the notch by providing an air sealing part in the longitudinal direction on the side seal facing the stopper and forming a notch in the bottom seal facing the stopper. By holding the bottom of the wrapping bag and supporting the bottom of the wrapping bag with the other hand, the wrapping bag is not bent at the time of pouring and can be poured stably.

  Moreover, when the length of the major axis of the cut portion is 20 mm or more, a human thumb, index finger, middle finger, or the like can be easily inserted, and the packaging bag can be held.

  In addition, the body sheet and the bottom sheet are each composed of a laminated sheet composed of a plurality of layers, and at least one of the plurality of layers is a polyester film on which an aluminum foil or an inorganic oxide is deposited, whereby a packaging bag The oxygen gas barrier property and water vapor barrier property can be improved, and the quality storage period of the contents can be extended. In addition, it is possible to prevent the air in the air sealing portion from being released.

It is explanatory drawing which shows an example of the front of the self-supporting packaging bag of this invention. It is explanatory drawing which shows an example of the perspective view of the packaging bag of FIG. It is explanatory drawing which shows an example of the LL 'cross section of FIG. It is explanatory drawing which shows an example of the back surface of the packaging bag of FIG. It is explanatory drawing which shows an example of the shape of a notch part. It is explanatory drawing which shows an example which inserts a thumb into a notch part. It is explanatory drawing which shows an example of the cross section of the MM 'line of the packaging bag of FIG. It is explanatory drawing which shows an example of the state which pours out the contents from the self-supporting packaging bag of FIG. It is explanatory drawing which shows an example of the laminated constitution of a trunk | drum part sheet | seat and a bottom part sheet | seat.

  Below, the form for implementing this invention is demonstrated.

  FIG. 1 is an explanatory view showing an example of the self-supporting packaging bag of the present invention. The self-supporting packaging bag 1 of the present invention is composed of a trunk sheet 2, 2 ′ and a bottom sheet 3 that are disposed to face each other. The trunk sheet 2, 2 'and the bottom sheet 3 are flexible sheets. The bottom sheet 3 is inserted while being folded between the lower parts of the body sheets 2 and 2 ', the bottom is sealed to form the bottom seal 5 and the sides are sealed to form the side seals 4 and 4', respectively. Further, the top part is sealed to form the top seal part 6, and a stopper 15 is attached to the upper corners of the side seal part 4 and the top seal part 6. In addition, one air sealing portion 7 is formed in the longitudinal direction in the side seal portion 4 ′ that faces the plug. Moreover, the notch part 8 which can insert a finger | toe is formed in the bottom seal part facing a spigot.

  The air-sealed portion 7 formed in the side seal portion serves as a support column and can prevent the packaging bag from being bent during display or extraction. Even when the contents are stored in a reduced state, the packaging bag can be prevented from being bent.

  In addition, by forming a cut-in part into which the finger can be inserted into the bottom seal part, when pouring out, it is possible to insert the finger and hold the bottom part of the packaging bag for stable pouring.

  FIG. 2 is an explanatory view showing an example of a perspective view of the self-supporting packaging bag of FIG. 1. In the self-supporting packaging bag 1, the bottom sheet 3 is folded between the lower parts of the body sheets 2, 2 ′, and the bottom part is sealed to form a bottom seal part 5. A stopper 15 is attached to the upper corner, one air sealing part 7 is formed in the longitudinal direction on the side seal part 4 ′ facing the stopper 15, and the bottom seal part 5 facing the stopper 15 is A cut portion 10 into which a finger can be inserted is formed.

  FIG. 3 is an explanatory view showing an example of an LL ′ cross section of the self-supporting packaging bag of FIG. 2. The bottom sheet 3 is folded between the lower portions of the body sheets 2, 2 ′, and the body sheet and the bottom sheet are sealed to form the bottom seal portion 5. In the top part, a top seal part is formed, and a content storage part 9 is formed in the space between the body sheet 2, 2 ′ and the bottom sheet 3. Since the bottom seal portion 5 is formed by being folded, the bottom seal portions 5 are formed to face each other. The bottom seal portion facing the plug is formed with a cut portion into which a finger can be inserted so as to face each other.

  FIG. 4 is an explanatory view showing an example of the back surface of the self-supporting packaging bag of FIG. 1. On the back surface of the self-supporting packaging bag 1, a cut portion 8 is similarly formed in a position facing the cut portion shown in FIG. In this way, for example, the thumb of the hand is inserted into one of the cuts, the other finger of the hand is inserted into the cuts facing each other, and hooked to hold the bottom of the packaging bag firmly. can do.

  FIG. 5 is an explanatory diagram illustrating an example of the shape of the cut portion. FIG. 5A shows a circular cut portion 8. The cut line 10 is formed in a circular shape, and a part 11 having no cut line is provided on the side opposite to the plug and a part 11 connected to the bottom part is formed. By providing the circular major axis A of 20 mm or more, a human finger can be easily inserted. FIG. 5B shows an elliptical shape. Even in this case, a portion without a cut line is provided on the side opposite to the plug and the portion 11 connected to the bottom portion is formed. By providing the elliptical major axis A of 20 mm or more, a human finger can be easily inserted. FIG. 5-3 is a rectangular shape in which a portion without a cut line is provided on the side opposite to the plug and a portion 11 connected to the bottom portion is formed. By providing a circular major axis A of 20 mm or more, a human finger can be easily inserted.

  An example at the time of pouring using the self-supporting packaging bag of this invention is demonstrated easily.

  FIG. 6 is an explanatory view showing an example of inserting the thumb 21 into the cut portion 8. The bottom seal portion 5 is formed by sealing the trunk portion sheet 2 and the bottom portion sheet 3. As shown in FIG. 6A, the thumb 21 is pressed against the cut portion 8 formed by the cut line 10 of the bottom seal portion 5, and then, as shown in FIG. As shown in FIG. 6-3, the notch 8 is pushed, and the thumb is bent so that the thumb is hooked into the formed hole. The insertion of the finger is performed in the same manner for the other index finger and middle finger.

  FIG. 7 is an explanatory view showing an example of a cross section taken along line MM ′ of the self-supporting packaging bag of FIG. 2. The body sheet 2, 2 ′ arranged to face each other is sealed at the side to form side seal parts 4, 4 ′. A content storage portion 9 is formed in the space between the body sheets 2 and 2 ', and an air sealing portion 7 is formed in the right side seal portion 4'. The air enclosing part 7 serves as a support for supporting the packaging bag and improves the self-supporting property. By providing the air enclosing portion 7, even if the packaging bag is bent at the time of pouring or stored in a state where the contents are reduced, the packaging bag is not bent.

  FIG. 8 is an explanatory view showing an example of a state in which contents are poured out from the self-supporting packaging bag of FIG. 1. It is explanatory drawing which shows an example of the state which pours out the content from the self-supporting packaging bag which accommodated the large-capacity content. The cap of the spigot is removed, the spout 16 is exposed, and, for example, the thumb 21 of the right hand 20 is inserted and hooked into the notch 10 formed in the bottom seal portion 5 facing the spigot. The middle finger 22 is inserted into the other cut portion and hooked to hold the bottom portion 5 of the packaging bag, and the lower hand 23 supports the bottom of the packaging bag 1 and pours into the bottle 24. If the volume of the contents becomes large, the self-supporting packaging bag becomes large, so that it can be stably poured out using both hands. Moreover, since the air sealing part is in the side seal part facing the plug, the packaging bag is not bent and can be poured out stably.

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

  FIG. 9 is an explanatory diagram illustrating an example of a layer configuration of the trunk sheet and the bottom sheet. The trunk | sheet part sheet | seat 2, 2 'and the bottom part sheet | seat 3 are sheets which have flexibility, and the following laminated sheet 30 is mentioned as an example at least. For example, as shown in FIG. 9A, the base film layer 31 and a heat-sealing sealant layer 33 are laminated through an adhesive layer 32. The laminated sheet 30 has a layer configuration of base film layer 31 / adhesive layer 32 / sealant layer 33.

  As the base film layer 31, a plastic film having heat resistance can be used. Examples thereof include polyester film, polyethylene naphthalate film, polybutylene terephthalate film, polyethylene film, polypropylene film, nylon film, polystyrene film, polycarbonate film, polyacrylonitrile film, polyimide film, polyvinyl alcohol film, and polyvinylidene chloride film. The support is not particularly limited as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. The thickness of the base film is preferably in the range of 10 to 50 μm in consideration of processability.

  As the sealant layer 33, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-methacrylic acid copolymer (EMAA), ethylene- A film made of a polyolefin resin such as ethyl acrylate copolymer (EAA), ethylene-vinyl acetate copolymer (EVA), ionomer, polypropylene (PP) can be used. These resins can be used by forming a film with an extruder. It can be used in a single layer or multiple layers using the above resin. As film thickness, the range of 50-200 micrometers is preferable.

  As the adhesive layer 32, 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. Moreover, it can also bond together via an anchor agent (adhesive agent), extruding a sealant layer with an extruder.

  Moreover, the base film layer 31 can be provided with a printing layer as necessary. The layer structure is as shown in FIG. The laminated sheet 30 has a layer configuration of base film layer 31 / printing layer 35 / adhesive layer 32 / sealant layer 33. The printing layer 35 is formed of an ink formed by adding a solvent, a binder resin such as urethane, acrylic, nitrocellulose, or rubber, and various pigments, extenders, plasticizers, drying agents, stabilizers, and the like. Is the layer to be played. 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 as the pre-treatment on the surface of the base film layer in advance. Usually, a printing layer is provided on the inner surface of the base film layer.

  Further, if it is necessary to improve various physical properties of the laminated sheet 30, the intermediate layer 34 can be provided on the laminated sheet. For example, the intermediate layer can be laminated in the case of improving the rigidity, drop strength, puncture strength, etc. of the packaging bag, and improving the oxygen gas barrier and water vapor barrier when the contents are food. The layer structure shown in FIG. The laminated sheet 30 has a layer configuration of base film layer 31 / printing layer 35 / adhesive layer 32 / intermediate layer 34 / adhesive layer 32 / sealant layer 33. Further, in order to improve the piercing property and the gas barrier property, two or more layers may be laminated on the intermediate layer.

  As the intermediate layer 34, for example, a polyester film or a nylon film can be used to improve the drop strength, the piercing strength, and the like. Moreover, in order to improve gas barrier properties, such as an oxygen gas barrier and a water vapor | steam barrier, aluminum foil, an aluminum vapor deposition polyester film, the polyester film which vapor-deposited inorganic oxide, a polyvinylidene chloride film, etc. can be used. In particular, an excellent gas barrier property can be obtained by using a polyester film on which an aluminum foil or an inorganic oxide is deposited. 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 and magnesium oxide are preferable in terms of productivity and price.

  Below, an example of the specific manufacturing method of the self-supporting packaging bag of this invention is demonstrated.

  As the base film layer, a polyester film is used, and gravure printing is performed using a gravure ink having a urethane resin as a binder on one side of the polyester film.

  An aluminum foil is used as an intermediate layer on the printed surface, and is bonded by a dry laminating method via a two-component curable urethane adhesive.

  Next, a nylon film is bonded to the surface of the aluminum foil by a dry laminating method using a two-component curable urethane adhesive.

  Next, a linear low density polyethylene film is bonded to the surface of the nylon film by a dry laminating method using a two-component curable urethane adhesive. In this way, a laminated sheet is created.

  Next, in order to form a self-supporting packaging bag, the laminated sheet is slit to a predetermined width to form a trunk sheet and a bottom sheet.

  Next, the bottom sheet is sandwiched between the lower parts of the body sheet facing each other while being folded, and the bottom part and the left and right side parts are sealed to form the bottom seal part and the side seal part, respectively. Then, the top seal portion is formed by sealing with leaving the opening filled with the contents. At this time, a plug formed in advance is attached to the upper corner. At this time, a gap formed by an unsealed portion in the longitudinal direction is formed in the side seal portion facing the plug.

  Next, a method for forming the air enclosure will be briefly described.

  A press-fitting hole for press-fitting air is formed at the end in the longitudinal direction of the gap. The press-fitting hole may be a hole that penetrates the trunk sheet. In order to press-in air from the press-fitting hole, another press-fitting nozzle is brought into contact with the press-fitting hole. Forming part. Thereafter, the press-fitting hole is sealed. That is, the press-fitting hole is closed by the sealant layer, and an air enclosing part is formed. The air sealing portion may be formed on the side seal portions on both sides, and can further improve the self-supporting property. Even if the contents are stored at the time of display or dispensing, the packaging bag can be prevented from being bent. In addition, the packaging bag can be held more stably at the time of dispensing.

  Next, the notch part which can insert a finger into a bottom seal part is formed. The cut line forming the cut portion can be formed by punching using a Thomson blade or laser processing, for example. As the type of laser, a carbon dioxide laser is preferable. It is preferable that the notch portion is not completely removed, and a portion that remains part of the cut portion and that is connected to the bottom portion is formed.

  Further, the shape of the cut portion is preferably a circular shape, and the major axis is preferably 20 mm or more. A general person's thumb, index finger, and middle finger can be easily inserted.

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

A polyester film 12 μm, an aluminum foil 7 μm, and a nylon film 25 μm were bonded as a base film layer by a dry laminating method through a two-component curable urethane adhesive. Polyester film 12 μm / adhesive layer / aluminum foil 7 μm / adhesive layer / nylon film 25 μm was formed.

  Next, as a sealant layer, a linear low density polyethylene film 150 μm was bonded to the nylon film surface through a two-component curable urethane adhesive by a dry laminating method to prepare a laminated sheet. Polyester film 12 μm / adhesive layer / aluminum foil 7 μm / adhesive layer / nylon film 25 μm / adhesive layer / linear low density polyethylene film 150 μm was formed.

  Next, in order to form a self-supporting packaging bag, the laminated sheet was slit into a predetermined width of the trunk sheet and the bottom sheet.

  Next, the bottom sheet is sandwiched between the lower parts of the body sheets facing each other while being folded, and the bottom part and the left and right side parts are sealed to form the bottom seal part and the side seal part, respectively, and then the top part is sealed. A top seal was formed. An opening for filling the contents was also formed in the top seal part. In addition, a stopper formed in advance was attached to the upper corner portion composed of the left seal portion and the top seal portion. A self-supporting packaging bag with a spigot was formed.

  The size of the self-supporting packaging bag was formed to have a length of 350 mm, a width of 230 mm, and a bottom sheet folding width of 70 mm in order to store 2800 ml of the contents. In addition, one air-sealed portion with a length of 7 mm × length of 230 mm was formed in the longitudinal direction on the side seal portion facing the plug. In addition, a notch portion having a circular shape of Φ20 mm and a portion having no notch of 10 mm was formed on the opposite side to the cap at the bottom seal portion facing the cap. The cut line was made by punching using a Thomson blade.

  Next, 2800 ml of shampoo was filled from the opening of the self-supporting packaging bag, the opening was sealed, and a self-supporting packaging bag that accommodated a large volume was created.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
A self-supporting packaging bag was formed in the same manner as in Example 1 except that no air-sealed portion was formed.

<Comparative example 2>
A self-supporting packaging bag was formed in the same manner as in Example 1 except that the air sealing part and the cut part were not formed.

<Evaluation method>
・ Easy to pour out (refill) when pouring into bottles was evaluated.
It was marked as ◯ that it was possible to stably pour out by hooking a finger on the cut portion to lift the bottom and pouring while supporting the packaging bag with the other hand. X indicates that it is difficult to hold a packaging bag and difficult to pour out.
・ The independence of the self-supporting packaging bag was evaluated. The self-supporting property of the packaging bag with 1000 ml of the contents remaining was evaluated. Those that were self-supporting were marked with ○. The case where the upper part of the packaging bag hangs down and bends was marked with x.

<Evaluation results>
Table 1 shows.

注出し易さは、切り込み部に指を引っ掛けて底を持ち上げ、他方の手で包装袋を支えて注出することで、注出し易かった。切り込み部のないものは、包装袋が持ち難く、注出し
難かった。また、自立性については、空気封入部がないと、包装袋の上部が垂れ下がり、形がくずれていた。よって、空気封入部を設けることで、陳列時での折り曲がりや、かつ、内容物が少なくなった状態で保存させても、自立性を維持することができるものであることが判った。

The ease of pouring was easy by pouring the finger into the notch, lifting the bottom, and pouring while supporting the packaging bag with the other hand. Those without cuts were difficult to hold the packaging bag and difficult to pour out. As for the self-supporting property, if there was no air sealing part, the upper part of the packaging bag hanged down and the shape was broken. Therefore, it has been found that by providing the air-sealed portion, it is possible to maintain the independence even when it is folded at the time of display and stored in a state where the contents are reduced.

DESCRIPTION OF SYMBOLS 1 Self-supporting packaging bag of this invention 2 trunk | drum sheet | seat 2 'trunk | drum sheet | seat 3 bottom sheet | seat 4 side seal | sticker part 4' side seal | sticker part 5 bottom seal | sticker part 6 top seal part 7 air enclosure part 8 cut part 9 contents storage part 10 Cut line 11 Portion connected to bottom 15 Plug 16 Port 20 Right hand 21 Thumb 22 Middle finger 23 Left hand 24 Bottle 30 Laminated sheet 31 Base film layer 32 Adhesive layer 33 Sealant layer 34 Intermediate layer 35 Print layer A Long diameter

Claims (3)

The bottom sheet is folded inward at the lower part of the body sheet that is disposed oppositely, and a bottom seal part that is sealed with the body sheet is formed. Both side parts are sealed, and the side seal part and the top part are sealed, and the top seal part. In a self-supporting packaging bag having a cap formed of a cap and a mouth at the upper corner,
In the side seal portion facing the plug, an air-sealed portion is formed in the longitudinal direction,
And, self-supporting packaging bag, characterized by comprising on the front side and the back side of the bottom sealing portion which faces the spout, the cut portion can be inserted a finger at a position facing each other to form, respectively.   The self-supporting packaging bag according to claim 1, wherein a length of a major axis of the cut portion is 20 mm or more.   The body sheet and the bottom sheet are each composed of a laminated sheet composed of a plurality of layers, and at least one of the plurality of layers is a polyester film on which an aluminum foil or an inorganic oxide is deposited. Item 3. The self-supporting packaging bag according to item 1 or 2.

Images