JP5016000B2 - Free-standing bag with chuck - Google Patents

Description

  The present invention relates to a self-supporting bag with a chuck.

  Conventionally, as a self-supporting bag with a chuck, as shown in FIGS. 8 and 9, a partition sheet 33 is interposed between a pair of side sheets 31 and 32, and the partition sheet 33 and one side sheet 31 are interposed. After forming the chuck 34 and the easily peelable joint portions 35, 35 and filling the contents from the filling opening 36 provided between the other side sheet 32 and the partition sheet 33, the upper end of the partition sheet 33 and the other side surface There was one that was difficult to peel and join to the upper end of the sheet 32 (see, for example, Patent Document 1).

  In addition, an easy peel tape with an easy peel layer on one side and a thermal adhesive layer on the other side is inserted in the opening of the bag to improve the opening of the bag and prevent peeling from the inside of the bag (For example, refer to Patent Document 2).

  Furthermore, as a bag using the above-described easy peel tape, for example, as shown in FIG. 10, the easy peel layer 43b of the easy peel tape 43 is easily peeled on one side sheet 41 of a pair of side sheets 41, 42. In some cases, the thermal adhesive layer 43a of the easy peel tape 43 is bonded to the other side sheet 42 with difficulty peeling.

Japanese Patent No. 3020834 JP 2008-44671 A

  In general, a self-standing bag with a chuck wholesales the bag to the content manufacturer in a state before the bag manufacturer fills the content in the bag, that is, in a state where the opening for filling is not sealed, A filling manufacturer heat seals the filling opening after filling the contents. For this reason, bag manufacturers set a certain range in which the opening for filling can be heat-sealed to some extent, so that they can handle different types of automatic filling machines used by manufacturers of contents.

  In the thing of patent document 1, as shown in FIG.8 and FIG.9, after filling the content 37 from the opening 36 for filling provided in the upper part of the bag by the manufacturer of the content, the opening 36 for filling is heated. Although the sealing can be performed, the position where the filling opening 36 is heat-sealed has been limited to the opening side tip of the other side sheet 32 and the partition sheet 33. Further, when the consumer opens the bag, if the cutting line C1 shown in FIG. 9 is accidentally cut with a scissors or the like above the chuck, the filling opening 36 is opened and the contents 37 are opened. Could not be held in the bag. Furthermore, when the contents enter the space 38 formed between the other side sheet 32 and the partition sheet 33 when being carried, the feeling when opening and closing the chuck may be deteriorated.

  Further, in the bag shown in FIG. 10 described above, since a certain degree of accuracy is required at the position where it is difficult to peel and join, the easy peel tape 43 is easily peeled to the pair of side sheets 41 and 42 by the bag manufacturer. In the state of joining and difficult-to-peel joining, the bag was wholesaled to the manufacturer of the contents, and the contents manufacturer filled the contents from the bottom side of the bag and then heat sealed the bottom. For this reason, it was difficult to apply such a type of bag to a self-supporting bag having a special shape at the bottom.

  Accordingly, the present invention provides a self-supporting bag with a chuck that can be set to a wide range in which heat-sealing can be performed on the filling opening for difficult-to-peel bonding, and can be made simpler depending on the contents that are difficult to adhere to the chuck during filling. The purpose is to do.

  In order to achieve the above object, the self-supporting bag with a chuck of the present invention is arranged between a pair of side sheets formed of a composite film having a non-adhesive layer on the front side and a thermal adhesive layer on the back side, and the pair of side sheets. In the self-supporting bag with a chuck provided with the chuck, a step is provided at the bag opening side end portion above the chuck of the pair of side sheets, and a knob is formed on the upper end side of the short side sheet, An easy peel tape provided with an easy peel layer on one side surface and a thermal adhesive layer on the other side surface is provided on the opening side of the pair of side sheet sheets, above the chuck, and on the knob. An easy peel joint for joining the thermal adhesive layer of the side sheet on the short side and the easy peel layer of the easy peel tape to the lower side from the piece, and the easy peel tape on the upper side from the pick piece It has a hard-to-peel joint that joins the adhesive layer and the thermal adhesive layer of the side sheet on the long side, and a non-adhesive or hard-to-adhere adhesive composition that has a bead protruding on the inner side of the bag at the upper end of the knob. In a state where the short-side side sheet and the easy peel tape are joined by the easy-peeling joint, formed between the resin and the easy-peel tape before joining by the difficult-peeling joint and the long-side side sheet In the state where the filling opening is formed, and after filling the contents in the bag, the easy peel tape and the side sheet on the long side are joined by the hard-to-peel joint and the filling opening is sealed, The easy-peeling tape and the short-side side sheet are joined to each other to peel off the easy-peeling joint, so that an opening for extraction is formed. It is characterized in that it is closed can sealed.

  Further, the step at the bag opening side end of the pair of side sheets is 10 mm or more, the length of the knob piece in the vertical direction of the bag is 5 mm or more, and the length of the easy peel joint in the vertical direction of the bag is 5 mm or more. Is preferable. Further, the easy peel tape may be provided with a non-adhesive layer on the outer surface of the easy peel layer above the knob, and the lower part of the non-adhesive layer extends downward in a non-adhered state, A cover piece covering the outside can also be formed.

  According to the self-supporting bag with a chuck of the present invention, when the heat adhesive layer of the easy peel tape on the upper side of the pick piece and the heat adhesive layer of the side sheet on the long side are heat-sealed, the seal position is shifted and the pick piece Even if the position of the handle is heat-sealed, the knob and the easy peel tape do not adhere to each other due to the bead formed of a non-adhesive or difficult-to-adhere synthetic resin. Can be prevented from joining. As a result, even if the manufacturer of the contents performs heat sealing between the thermal adhesive layer of the long side sheet and the thermal adhesive layer of the easy peel tape, the gap between the long side sheet and the easy peel tape is not limited. In addition, it is possible to satisfactorily form the difficult-to-peel joint portion, to favorably peel the easily peelable joint portion, and to easily form the extraction opening. Also, in this way, a filling opening is provided on the opening side of the bag, and the filling opening can be heat-sealed after filling the bag with the manufacturer of the contents. It can be applied to a self-supporting bag having a shape. Particularly, even when the contents are filled from the opening side of the bag, it is difficult to adhere to the chuck. Yes. Furthermore, even if the consumer accidentally cuts the position above the chuck with a scissors, the contents can be prevented from leaking by the chuck.

  Further, if the step of the bag opening side end portion of the pair of side sheets is set to 10 mm or more, heat sealing between the thermal adhesive layer of the long side sheet and the thermal adhesive layer of the easy peel tape can be performed satisfactorily, Moreover, if the length dimension of the pick piece in the vertical direction of the bag is set to 5 mm or more, the pick piece is easily grasped when the bag is opened. Furthermore, when the length dimension in the bag up-down direction of the easily peelable joint portion is set to 5 mm or more, the sealing performance of the bag before opening can be maintained.

  Furthermore, by providing a non-adhesive layer on the outer surface of the easy peel layer above the knob of the easy peel tape, the heat-sealed portion can be reinforced. In addition, the lower part of the non-adhesive layer extends in a non-adhesive state with the outer surface of the easy peel layer to form a cover piece, so that when the bag manufacturer wholesales the bag to the content manufacturer, the contents When filling the contents or heat-sealing the opening for filling at the manufacturer, cover the outside of the knob with a cover piece, so that foreign matter such as dust is placed between the knob and the easy peel tape. Intrusion can be prevented. When opening the bag, the consumer should bend the upper side of the long side sheet outward to lift the cover piece and insert the cover piece between the pick piece and the easy peel tape. Therefore, it is possible to satisfactorily form the opening for taking out the contents and open / close the chuck.

It is sectional drawing of the self-supporting bag with a chuck | zipper before the contents filling which shows the 1st example of this invention. It is a front view of the self-supporting bag with a chuck | zipper before content filling similarly. It is explanatory drawing when heat-sealing an easy peel tape and a long side sheet similarly. It is explanatory drawing when heat-sealing an easy peel tape and a long side sheet similarly. It is explanatory drawing of the self-supporting bag with a chuck | zipper after heat-sealing the easy peel tape and the long side sheet similarly. It is sectional drawing of the self-supporting bag with a chuck | zipper before the contents filling which shows the 2nd form example of this invention. It is principal part explanatory drawing of the self-supporting bag with a chuck | zipper which shows the 3rd form example of this invention. It is explanatory drawing of the self-supporting bag with a chuck | zipper before the conventional content filling. It is explanatory drawing of the self-supporting bag with a chuck | zipper after the conventional content filling. It is explanatory drawing of the conventional bag with a chuck | zipper.

  FIG. 1 thru | or FIG. 5 is a figure which shows the 1st form example of the self-supporting bag with a chuck | zipper of this invention. A self-supporting bag 1 with a chuck shown in the present embodiment is a self-supporting bag having a town at the bottom, and is provided at a pair of long and short side sheets 2 and 3 and at the lower ends of the side sheets 2 and 3. A bottom sheet 4 that is a gusseted bottom, and an easy peel tape 5 interposed on the opening side between the pair of side sheets 2 and 3, and below the easy peel tape 5, The chuck 6 provided between the short side sheet 2 and the other long side sheet 3 is provided.

  The side sheets 2 and 3 and the bottom sheet 4 are formed of a multilayer synthetic resin film (sheet) having a non-adhesive layer on the front side and a thermal adhesive layer on the back side, for example, a nylon film having a high melting point on the front side. And the back side is each formed with the polyethylene film with low melting | fusing point. The side sheets 2 and 3 are provided with a step of 10 mm or more at the bag opening side end above the chuck 6, and the upper side of the short side sheet 2 is inclined toward the outside of the bag and A knob 2a having a length dimension of 5 mm or more in the direction is formed. Further, at the upper end of the knob 2a and the upper end of the side sheet 3 on the long side, ball edges 2b and 3a protruding inside the bag are formed, respectively. These ball edges 2b and 3a are made of a non-adhesive synthetic resin (for example, nylon) having a high melting point, or a difficult-to-adhere resin (for example, high-density polyethylene or the like) having the same melting point as that of the thermal bonding layer of the side sheets 2 and 3. Medium density polyethylene). In addition, when the ball edges 2b and 3a are formed of a hardly adhesive resin having the same system and high melting point as the thermal adhesive layer, it may be formed by extruding and adhering to the thermal adhesive layer of the side sheets 2 and 3, and non-adhesive having a high melting point. In the case of forming with a synthetic resin, the rims 2b and 3a have a two-layer structure of a non-adhesive synthetic resin having a high melting point and a thermal adhesive layer of the side sheets 2 and 3 and the same resin, and the thermal adhesive layer is the same. The resin side may be bonded to the heat bonding layer of the side sheets 2 and 3. Further, the side sheets 2 and 3 can be folded inward to form the balls 2b and 3a.

  The easy peel tape 5 is a well-known three-layer structure comprising a thermal adhesive layer 5a formed of a polyethylene film or an unstretched polypropylene sheet, an intermediate layer 5b formed of a polyethylene terephthalate sheet or a nylon sheet, and an easy peel layer 5c. It is also possible to use a tape composed of two layers of the thermal adhesive layer 5a and the easy peel layer 5c. The easy peel tape 5 is interposed on the opening side of the side sheets 2 and 3, and the lower end portion is located on the upper side of the chuck 6 and on the lower side of the knob piece 2 a, and the long side side sheet 3. The upper ends are arranged at the same height as the upper ends.

  As shown in FIG. 1, in the bag manufacturer, each sheet 2, 3, 4 is heat-sealed between the lower end portion of the thermal adhesive layer of the side sheets 2, 3 and the side edge of the thermal adhesive layer of the bottom sheet 4. Each of the side edges of the thermal adhesive layers of the side sheets 2 and 3 is joined in a difficultly peeled state and formed into a bag shape, and the thermal adhesive layer of the short side sheet 2 and The easy peel tape 5 is joined to the lower portion of the easy peel layer 5c in an easily peeled state, and an easy peel joint portion 7 having a length dimension of 5 mm or more is provided in the bag vertical direction. On the other hand, the side sheet 3 on the long side and the easy peel tape 5 are in an unbonded state before the contents are filled, and form an opening 8 for filling the contents. In this state, the self-supporting bag with a chuck 1 is wholesaled to manufacturers of granular or capsule-like confectionery, supplements, tablets and the like.

  When filling the contents 9 in the self-supporting bag 1 with a chuck at the manufacturer of the contents, the chuck 6 is opened and the opening for filling the contents between the long side sheet 3 and the easy peel tape 5 is opened. Performed with 8 expanded. Next, as shown in FIG. 3, the thermal adhesive layer 5a above the knob 2a of the thermal adhesive layer 5a of the easy peel tape 5 and the thermal adhesive layer of the side sheet 3 on the long side opposite thereto are heated by the automatic filling machine. The contents 9 are filled by being heat-sealed by the operation of the seal bar 12 and the seal bar receiver 13 and bonded in a hardly peeled state to become the hardly peeled joint 10 that closes the opening 8 for filling the contents. The zippered self-supporting bag 1 in a sealed state is formed. At this time, the position of the heat seal bar 12 and the seal bar receiver 13 is hung on the upper side of the knob 2a as shown in FIG. 4 due to the difference in the model of the automatic filling machine and the position of the bag. In addition, the edge 2b provided on the top of the knob 2a can prevent the knob 2a and the easy peel tape 5 from coming into close contact with each other and prevent the knob 2a and the easy peel tape 5 from being joined together. The inclination of the knob 2a is also ensured.

  Thus, when a consumer opens a bag whose opening is sealed by the easy-peel joint 7 and the hard-peel joint 10, the vicinity of the bead 3a formed at the upper end of the side sheet 3 and When gripping the vicinity of the edge 2b formed at the upper end of the knob 2a and pulling the both side sheets 2 and 3 apart, the easy peel tape 5 joined at the easy peel joint 7 and the side sheet 2 on the short side Is peeled off, and an opening for taking out the contents is formed between the easy peel tape 5 and the side sheet 2, and the contents 9 can be taken out from the opening for taking out the contents. At this time, since the easy peel tape 5 and the side sheet 3 on the long side are completely joined by the hard-to-peel joint 10, the easy peel tape 5 and the side sheet 3 on the long side are peeled off. Never do. After a necessary amount of content has been taken out from the content take-out opening, the content take-out opening can be sealed by the chuck 6 in an openable / closable state.

  According to the zippered self-standing bag 1 of the present embodiment formed as described above, after the content manufacturer fills the bag with the content 9, the difficult-to-peel joint 10 can be formed satisfactorily. In particular, even if the contents 9 are filled from the opening side of the bag, it is suitable for a bag that is filled with granular or capsule-like contents that do not easily adhere to the chuck. In addition, when the consumer opens, the easy peel joint 7 is peeled off and the contents takeout opening is formed simply by grasping and opening the top of the side sheet 2 and the top of the side sheet 3. Therefore, no dust is generated at the time of opening, and since the edge 2b, 3a is provided at the opening end, it becomes easy to grasp the opening portion, so even a weak child or an elderly person can easily open it. can do. Further, as shown in FIG. 5 (A), even if the consumer accidentally cuts a position above the chuck, for example, the cutting line C2 with a scissors, as shown in FIG. 5 (B), the chuck 6 can prevent the contents 9 from leaking. Further, since the chuck 6 is directly attached to the side sheets 2 and 3, the chuck 6 can be satisfactorily closed simply by picking up the portion of the chuck 6 with a finger from the outside of the bag.

  6 and 7 show another embodiment of the present invention. Components that are the same as those in the first embodiment are designated by the same reference numerals, and detailed description thereof is omitted.

  FIG. 6 shows a second embodiment of the present invention. A self-standing bag 21 with a chuck according to the present embodiment has a polyethylene terephthalate sheet or a nylon sheet on the outer surface of the easy peel layer 5c above the knob of the easy peel tape 5. A non-adhesive layer 5d formed of a stretched polypropylene film or the like is provided to reinforce the heat seal portion.

  FIG. 7 shows a third embodiment of the present invention. A self-supporting bag 22 with a chuck according to the present embodiment has an outer surface of an easy peel layer 5c of an easy peel tape 5 on the lower part of the non-adhesive layer 5d of the second embodiment. A cover piece 5e extending in a non-adhered state and covering the outside of the knob piece 2a is formed.

  In the self-supporting bag 22 with a chuck, when the bag manufacturer wholesales the bag to the content manufacturer, as shown in FIG. 7A, the outside of the knob 2a is covered with a cover piece 5e. Thus, foreign matter such as dust can be prevented from entering between the knob and the easy peel tape. Further, even when the content manufacturer performs the filling of the content or the heat sealing of the content filling opening 8, the cover piece 5e covers the outside of the pick piece 2a, so that the handle piece 2a and the easy-to-use piece 2a are easy. It is possible to prevent foreign matter such as dust from entering between the peel tape 5.

  When the consumer opens the bag 22, as shown in FIG. 7B, the upper side of the long side sheet 3 is folded outward to lift the cover piece 5e. As shown in (C), the cover piece 5 is inserted between the pick piece 2 a and the easy peel tape 5. Thereby, formation of the opening part for content extraction and opening / closing of the chuck 6 can be satisfactorily performed.

  The present invention is not limited to the side sheet formed by laminating a polyethylene film and a nylon film as in each of the above-described embodiments, and includes a non-adhesive layer and a thermal adhesive layer having different melting points. It is also possible to use a resin such as polypropylene, polyester, vinyl chloride or vinylon, or a laminate of aluminum foils. Further, the present invention is suitable for use in a self-supporting type bag having a special shape at the bottom, but a normal sheet is formed by folding a side sheet to form a bag bottom or heat-sealing and sealing the bag bottom. It can also be applied to a bag with a chuck.

  DESCRIPTION OF SYMBOLS 1 ... Self-supporting bag with a chuck, 2, 3 ... Side sheet, 2a ... Pick piece, 2b, 3a ... Ball, 4 ... Bottom sheet, 5 ... Easy peel tape, 5a ... Thermal adhesive layer, 5b ... Middle layer, 5c ... Easy peel layer, 5d ... non-adhesive layer, 5e ... cover piece, 6 ... chuck, 7 ... easy peel joint, 8 ... content filling opening, 9 ... content, 10 ... hard peel joint, 12 ... heat Seal bar, 13 ... Seal bar receptacle, 21, 22 ... Self-supporting bag with chuck

Claims (3)

In a self-supporting bag with a chuck, comprising a pair of side sheets formed of a composite film having a non-adhesive layer on the front side and a thermal adhesive layer on the back side, and a chuck disposed between the pair of side sheets. A step is provided at the bag opening side end above the chuck of the sheet, a knob is formed on the upper end side of the short side sheet, and an easy peel is provided on one side of the opening of the pair of side sheets. Layer, and an easy peel tape provided with a thermal adhesive layer on the other side surface, the upper side of the chuck and the lower side of the knob piece, the thermal adhesive layer of the short side sheet And an easy peel joint for joining the easy peel layer of the easy peel tape, and a difficulty in joining the thermal adhesive layer of the easy peel tape above the knob and the thermal adhesive layer of the long side sheet Peeling And a bead protruding from the inner side of the bag is formed of a non-adhesive or hard-adhesive synthetic resin at the upper end of the knob, and the easy-peel joint and the side sheet on the short side are easy In a state where the peel tape is joined, an opening for filling is formed between the easy peel tape before joining by the hard-to-peel joint and the side sheet on the long side, and after filling the contents in the bag, In the state where the easy peel tape and the side sheet on the long side are joined by the hard-to-peel joint and the opening for filling is sealed, the easy peel joint that joins the easy peel tape and the short side sheet is A self-standing bag with a chuck, wherein an opening for extraction is formed by peeling, and the opening for opening is sealed by the chuck so as to be openable and closable after peeling of the easily peelable joint portion. The easy peel tape is provided with a non-adhesive layer on the outer surface of the easy peel layer above the knob, and the lower part of the non-adhesive layer extends in an unbonded state with the outer surface of the easy peel layer. The self-supporting bag with a chuck according to claim 1, wherein a cover piece is formed to cover the outside of the bag. The level difference in the bag opening side end of the pair of side sheets is 10 mm or more, the length in the bag vertical direction of the knob is 5 mm or more, and the length in the bag vertical direction of the easily peelable joint is 5 mm or more. The self-supporting bag with a chuck according to claim 1.

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