JP6242034B2 - bag - Google Patents

Description

  The present invention relates to a bag filled with a powdery substance such as a powder detergent and suitable as a refill bag used in a box-shaped container.

  As a container used for granules or powdery powder substances such as powder detergents, a box-shaped container made of a paperboard material such as a paperboard or a plastic sheet is used (Patent Document 1). This box-shaped container is usually discarded after the contents are used.

  On the other hand, in order to save resources, the contents are accommodated in a self-supporting bag with a chuck (Patent Document 2), the contents are filled in a refill bag, and the whole bag is put into a box-shaped container. It is known to repeatedly use box-shaped containers by putting them in. And as such a combination of a refill bag and a box-shaped container, the box-shaped container main body which accommodates a bag is provided with the latching | locking part which latches the opening edge part of a refill bag, and opening of a refill bag It has been proposed to prevent squeezing (Patent Document 3).

Japanese Utility Model Publication No. 6-1221 Japanese Patent No. 4043229 JP 2010-143635 A

  However, the manufacturing cost of a bag with a chuck increases. Also, when using a refill bag in combination with a box-shaped container, after opening the refill bag, it is cumbersome to perform the operation of locking the opening edge of the refill bag to the box-shaped container, Even if the opening edge of the refill bag is locked to the box-shaped container, if the gap between the opening surface of the bag and the opening surface of the box-shaped container is large, the powdered substance can be removed from the box using a measuring spoon. When taking out from a container, a powdery substance may enter into the gap between the bag and the box-shaped container.

  On the other hand, the present invention provides a bag that can be accommodated in a box-shaped container and used as a refill bag that can be easily opened in a box-shaped container and is easy to use, and is provided at low cost. The purpose is to be able to.

  The inventor makes the bag accommodated in the box-shaped container body a specific shape having a gusset at the bottom, and the opening of the bag is aligned with the opening surface of the container body when the bag is opened. If the length from the bottom edge to the opening of the bag and the depth of the container body are approximately the same size, the bag is strongly pressed against the container body by the contents just by opening the bag inside the box-shaped container, and the bag It was found that the opening surface of the bag is maintained in a wide open state, and that the opening surface of the bag and the opening surface of the container main body are flush with each other, thereby improving usability after opening the bag.

That is, the present invention is a film bag filled with a powdery substance, which is accommodated in a box-shaped container body having an opening on the upper surface and having a lid covering the opening,
The bag has a gusset at the bottom, the top is a flat bag type, the outer width of the bag is narrower at the bottom end than the upper end, and the opening start portion is at the side seal,
Provided is a bag in which the length from the bottom edge of the bag to the opening start portion is approximately the same as the depth of the container body.

  The present invention also provides a method of using a bag that is opened from the opening start portion in a state where the bag is placed in a box-shaped container body and the bag is placed in the container body, and the bag and the bag are accommodated. A box-shaped container provided with a box-shaped container body and a lid that covers an opening of the container body.

  According to the bag of the present invention, the bag has a gusset at the bottom, the top is a flat bag type, and the outer width of the bag is narrower at the bottom end than the upper end. When the bag is put into the container main body, the bag is easy to put into the container main body because it has a reverse taper shape with a narrow bottom side, and after the bag is put into the container main body, it is easy to sit. That is, there is almost no gap between the outer surface of the bag and the container body, and the bag is fitted into the container body.

  Moreover, if a bag is put into a container main body and it opens from the opening start part in the state put in the container main body, it can open easily, without supporting the weight of the content in a bag by hand. The opening surface of the bag is maintained in a large and wide open state when the bag is strongly pressed against the container body by the contents. Therefore, it becomes easy to take out the contents with a measuring spoon or the like. This also eliminates the need to provide the container body with notches, holes, pressing members and the like for hooking the bag to the inner wall of the container body so that the bag opens largely within the container body.

  Furthermore, since the opening surface of the bag and the opening surface of the container body are flush with each other after opening, the opening end of the bag does not protrude unnecessarily from the opening surface of the container body. Therefore, when the container body is covered with the lid, the container body can be closed so as to be sealed with the lid without causing a gap between the opening end of the container body and the lid. Therefore, even if the box-shaped container with the lid closed is stored in a highly humid place such as a washroom, the contents can be prevented from getting wet. Moreover, when the opening surface of a bag and the opening end surface of a container main body are flush | planar, when taking out a content with a measuring spoon etc., it can prevent that a content enters between a bag and a container main body.

FIG. 1 is a perspective view of an example bag 10A filled with a powdery substance. FIG. 2 is a (1) front view, (2) AA view, and (3) BB view of a bag 10A not filled with a powdery substance. FIG. 3A is a perspective view of a box-shaped container in which a bag 10A is accommodated. FIG. 3B is a perspective view of a state in which the lid of the box-shaped container in which the bag 10A is accommodated is opened. FIG. 4 is a perspective view at the start of opening of the bag 10A accommodated in the container body. FIG. 5 is a (1) perspective view and (2) front view after opening the bag 10A accommodated in the container body. FIG. 6 is a perspective view of the bag 10B of the embodiment filled with a powdery substance. FIG. 7 is a (1) front view, (2) AA view, and (3) BB view of a bag 10B not filled with a powdery substance. FIG. 8 is a (1) perspective view of a container main body provided with a bag locking portion in the opening, and (2) a perspective view of a state in which the bag is accommodated in the container main body and the opening edge is locked. is there.

Hereinafter, the present invention will be specifically described with reference to the drawings. In each figure, the same numerals indicate the same or equivalent components.

  FIG. 1 is a perspective view of a film bag 10A filled with a powdery substance according to an embodiment of the present invention. FIG. 2 shows a front view (1), an AA view (2), and a BB view (3) of the bag 10A in a state in which the powdery substance is not filled for convenience of explanation. 3A is a perspective view of the box-shaped container 1 that accommodates the bag 10A, and FIG. 3B is a perspective view of the box-shaped container 1 with the lid 40 opened.

  As shown in FIG. 2, this bag 10A is formed by folding one film sheet into a rectangle so that a folded gusset 11 is formed at the bottom, and forming side seals 12 on both sides by heat sealing or the like. A top seal 13 having a wide seal width is formed at the portion, and a hem seal 14 is formed at the folded portion at the bottom. In this case, the seal width L1 of the top seal 13 is preferably set to 10 mm or more from the viewpoint of improving the ease of picking when it is picked up and opened from the notch 16.

  The side seals 12 on both sides are inclined seal portions 12a inclined with respect to the bottom edge of the bag 10A in the gusset 11 region. The angle θ between the edge of the oblique seal portion 12a and the extended line of the bottom edge is preferably 40 to 50 °, more preferably 45 °. Thus, since the outer shape of the bottom of the bag 10A is rectangular, when the bag 10A is accommodated in the container main body 30 of the box-shaped container 1, the outer shape of the bag 10A can be well adapted to the inner shape of the container main body 30. .

  The upper part of the bag 10 </ b> A is sealed in a flat bag shape by a top seal 13 and a side seal 12. Therefore, the outer width W1 of the bag filled with the contents at the bottom is narrower than the outer width W2 of the bag filled with the contents at the upper end of the bag 10A, and the bag 10A has a powdery substance. 1, as shown in FIG. 1, the width of the lower end portion is narrower than the upper end portion, and the area of the bottom portion formed by the gusset 11 is equal to or less than the area of the bottom surface of the container body 30. can do. Therefore, the bag 10A can be easily inserted into the container body 30 when the bag 10A in the container body 30 is refilled. Further, since the hem seal 14 is formed at the bottom of the bag 10A, the gusset 11 at the bottom of the bag 10A spreads in the thickness direction of the bag 10A when the bag 10A is filled with the powdery substance as the contents. Therefore, the independence as a single refill bag is stabilized.

  The side seals 12 extend in the vertical direction on both sides of the bag 10A, and each side seal 12 is provided with a notch 16 cut into a V shape as an opening start portion. In the present invention, an I-shaped notch, a U-shaped notch, a magic cut or the like may be formed as the opening start portion.

  As a formation position of the notch 16 and the top seal 13, it is preferable that a line connecting the notches 16 on both sides is located immediately below the lower end edge of the top seal 13. As a result, when opening the bag 10A from the notch 16, both the front and back films are torn along the top seal 13, so that the tearing directions of the front and back films are aligned and the bag 10A remains in the container body 30 and can easily be widened. Can open in the direction. In particular, the bag 10A is useful for improving tear straightness when the bag 10A is a general-purpose film having no tearability. In addition, even when the bag 10A is formed of a tearable film, the front and back films are not aligned depending on how the force is applied at the time of tearing. However, the formation of the top seal 13 and the notch 16 can eliminate such inconvenience, and can significantly improve the straightness of tearing in the width direction of the bag.

  In the present invention, the notch 16 is formed in the side seal 12 at a position where the vertical length H1 of the bag from the bottom edge of the bag 10A to the notch 16 is substantially equal to the depth H2 of the container body 30 of the box-shaped container 1. It is the same size. Here, the bottom edge refers to a portion that hits the bottom of the box-shaped container at the lowest end inside the bag, and the length H1 from the bottom edge of the bag 10A to the notch 16 is the depth H2 of the container body 30. The dimensions H1 and H2 are close to each other to the extent that the opening surface of the bag 10A and the opening surface of the container body 30 when the bag 10A is opened from the notch 16 are flush with each other. It means that For example, if the difference ΔH (FIG. 5) between the depth H2 of the container body 30 and the length H1 from the bottom edge of the bag 10A to the notch 16 is preferably within ± 5 mm, more preferably 0 mm, the bag 10A And the opening surface of the container body 30 are flush with each other.

  The length H1 from the bottom edge of the bag 10A to the notch 16 is set to be equal to or less than the depth H2 of the container body 30, for example, the depth H2 of the container body 30 and the bottom edge of the bag 10A to the notch 16. It is preferable that the difference (ΔH = H2−H1) with respect to the length H1 is 5 mm to 0 mm. The length H1 from the bottom edge of the bag 10A to the notch 16 is excessively larger than the depth H2 of the container body 30, and after opening the bag body 10A from the notch 16, the opening surface of the bag 10A is the opening of the container body 30. When protruding from the surface, when the lid 40 is closed to the container body 30, the opening end of the bag 10A is sandwiched between the opening end of the container body 30 and the lid 40, and the opening end of the container body 30 and the lid There is a case where a gap is formed between the container body 30 and the container body 30. The container body 30 is sealed with the lid 40 by positioning the opening surface of the bag 10 </ b> A near the opening surface of the container body 30 and below the opening surface of the container body 30. Can be closed. Therefore, even if the box-shaped container 1 with the lid 40 closed is stored in a highly humid place such as a washroom, it is possible to prevent the powdered substance of the contents from getting wet.

  Further, by positioning the opening surface of the bag 10A in the vicinity of the opening surface of the container body 30 in the vicinity of the opening surface of the container body 30, when the contents are taken out with a measuring spoon or the like, the space between the bag 10A and the container body 30 is reduced. It is possible to prevent the contents from entering the container.

  Further, by positioning the opening surface of the bag 10A in the vicinity of the opening surface of the container main body 30 in the vicinity of the opening surface of the container main body 30, the opening surface of the bag 10A after opening can be changed between the opening surface of the container main body 30 and the bag 10A. Since the bag 10A is strongly pressed against the container body by the contents, the opening surface of the bag 10A is maintained in a large and wide open state, and the contents are weighed. It becomes easy to take out with a spoon. Further, since the opening surface of the bag 10A does not protrude from the opening surface of the container main body 30, it is not necessary to bend the upper end portion of the bag 10A when the lid 40 of the container main body 30 is closed, and the opening surface of the bag 10A is greatly opened. It is easy to maintain in a wet state.

  On the other hand, if the opening surface of the bag 10A is too low with respect to the opening surface of the container main body 30, it is difficult to open the bag 10A from the notch 16 in the container main body 30 when the bag 10A is opened. Further, the powdery substance enters and accumulates between the bag 10A and the container main body 30 through the gap between the opening edge of the bag 10A and the opening end of the container main body 30, and the powdery substance is solidified by moisture entering from the gap. However, such a problem can be prevented by making the opening surface of the bag 10A and the opening surface of the container body 30 flush with each other.

  The circumferential length of the opening when the bag 10A is opened from the notch 16 is preferably substantially the same as the circumferential length of the inner dimension of the container body 30. As a result, as shown in FIG. 5, after opening the bag 10 </ b> A, the powdery substance P in the bag 10 </ b> A tries to spread, so that substantially the entire circumferential surface of the bag 10 </ b> A is pressed against the inner wall of the container body 30. For this reason, the opening shape of the bag 10A is wide and stable, and the powdery substance P can be easily taken out with the measuring spoon. Here, about the same dimension means that the upper end opening portion of the bag 10A falls inward due to the peripheral length of the upper end opening portion of the bag 10A being excessively short with respect to the inner peripheral length of the container body 30. In addition, the case where the bag 10A has a large slack due to the excessively long circumference of the upper end opening of the bag 10A is not included, the upper end opening of the bag 10A does not fall inward within the container body 30, and the bag 10A The circumference of the opening of the bag 10A and the circumference of the inner dimension of the container body 30 are about the same so that the upper end of the bag cannot be slack.

  Films forming the bag 10A include polyesters such as polyethylene terephthalate; polyamides such as nylon; low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), oriented polypropylene (OPP), unstretched polypropylene (CPP), etc. And can be used as a single layer or a laminated film. Among them, a film having straight tearability by stretching or the like is preferable. Particularly, when the film forming the bag 10A is a laminated film including an outer surface layer and / or an intermediate layer and an inner sealant layer, an inner sealant layer and an outer It is preferable that the surface layer and / or the intermediate layer have tear straightness in the bag width direction (the arrow direction in FIG. 4). As the inner sealant layer having straight tearability, linear low density polyethylene (L-LDPE) or the like is preferably subjected to an easy cut process.

  In addition, when using the film which has tear advanceability, you may use it for the whole bag 10A, and may use it only for the bag upper part which provides tearability.

  In addition, as the film forming the bag 10A, it is preferable to use a film having a barrier property against oxygen, water, etc., depending on the powdery substance filled in the bag 10A. Thereby, the barrier property required for container main body 30 itself can be reduced, the manufacturing cost of container main body 30 can be reduced, and the manufacturing cost as the box-shaped container 1 whole can also be reduced. In order to impart barrier properties to the film forming the bag 10A, a film layer having barrier properties may be laminated on the film forming the bag 10A. In addition, if necessary, the film forming the bag 10A may be provided with a layer for improving printing suitability and a layer for improving sealing properties.

  The thickness of the film forming the bag 10A is preferably 40 to 200 μm, and more preferably 100 to 150 μm so that the film has a firmness to the extent that the bag 10A is self-supporting even when there is no content. Thereby, after opening the bag 10A, the powdery material decreases with the use of the powdery material in the bag 10A, and even if the position where the powdery material presses the bag 10A against the inner wall of the container body 30 is lowered, An open state can be maintained and the ease of taking out a powdery substance can be maintained. Note that the self-supporting property of the bag 10A can also be improved by forming the hem seal 14 at the bottom of the bag 10A as described above.

  In addition, as the container main body 30 which accommodates the bag 10A, it can be set as the rectangular parallelepiped container formed using paperboard-like materials, such as a paperboard, a plastic sheet, and a plastic box.

  Moreover, the lid | cover 40 should just cover the upper surface opening part of the container main body 30, for example, the one edge | side can couple | bond with the back surface of the container main body 30, and hinge shape.

  The bag 10A can be preferably used as a refill bag for the box-shaped container 1 shown in FIG. 3A. As a method of use in this case, as shown in FIG. 3B, the lid 40 is opened, and as shown in FIG. 4, the bag 10A is torn in the width direction from the notch 16 by hand while the bag 10A is placed on the container body 30. . By this tearing, the upper end of the bag 10A is removed over its entire width. As shown in FIG. 5, the bag 10A remaining in the container main body 30 is pressed against the inner wall of the container main body 30 by the powdery substance P in the bag 10A as shown by an arrow, and opens widely.

  When the powdery substance P disappears due to the use of the powdery substance P in the bag 10A, a new refilling bag 10A filled with the powdery substance P is prepared and replaced with the previous bag 10A. At the time of this replacement, the bag 10A filled with the powdery substance P has a reverse taper type, so that the bag 10A can be easily inserted into the container body 30.

  As mentioned above, although one Example of this invention was described by the bag 10A shown in FIG. 1, this invention can take a various aspect. For example, the bag 10B shown in FIGS. 6 and 7 has a narrower seal width of the top seal 13 than the bag 10A of FIG. 1 described above, and a tear induction seal below the top seal 13 and immediately above the notch 16. 15 is formed. The tear induction seal 15 is obtained by sealing the front and back films of the bag 10B in a band shape in the width direction. According to this bag 10 </ b> B, the tearing guide seal 15 and the notch 16 can improve the straightness of tearing in the width direction of the bag.

  The tear induction seal 15 can be formed by heat sealing, ultrasonic sealing, high frequency sealing, or the like. In addition, FIG. 7 shows the front view (1), AA figure (2), and BB figure (3) of the bag 10B in the state which is not filled with a powdery substance for convenience of explanation. .

  The bag 10B is subjected to laser processing for improving easy cutability on a line connecting the notches 16 on both sides. 6 and 7, reference numeral 20 denotes a laser processing line subjected to this laser processing. As the laser processing for forming the laser processing line 20, it is preferable that the surface of the forming film of the bag 10B is damaged. Laser processing makes it easier to open the bag 10B in the container body.

  Further, in this bag 10B, the hem seal 14 is omitted. Depending on the material of the film, even if the hem seal 14 is omitted, the bag 10B can be provided with self-supporting properties.

  The container body 30 of the box-shaped container 1 may be provided with a locking portion that locks the opening edge of the bag to the opening. For example, as shown in FIG. 8 (1), a cut 32 can be provided in the folded piece 31 of the opening of the container body 30, and a part of the folded piece 31 can be used as the locking portion 33. FIG. 8 (2) shows a state in which the locking portion 33 is locked by sandwiching the opening edge portion of the bag 10 </ b> A.

  In addition, in this invention, the various deformation | transformation aspects of the bag mentioned above can be combined suitably.

  Examples of the powdery substance to be filled in the bag include granular detergents such as powder detergents, sugars and salts, and powdery substances. If the bulk density of the powdery substance is 700 g / L or more, it can be opened cleanly by the action of opening the bag outward. According to the present invention, even when the powdery substance in the bag is 800 g or more, the film forming the bag has sufficient strength to accommodate such a filling amount, and the bag is easily opened. It becomes possible.

(1) Production of box-shaped container Using resin-coated paperboard, the same as the box-shaped container shown in FIG. 3A (container body depth 130 mm, bottom width 150 mm, depth 130 mm, lid depth 20 mm) A box-shaped container having the locking portion shown in FIG. 8 was produced.
On the other hand, a laminated film (thickness 50 to 150 μm) of surface layer PET and back layer LLDPE was used as the film material for the bag, and the bag 10A shown in FIG. 1 was produced. In this case, the length from the bottom edge of the bag to the notch 16 is changed, and as shown in Table 1, the depth H2 of the container body 30 and the length H1 from the bottom edge of the bag 10A to the notch 16 are as follows. The difference ΔH (= H2−H1) was varied.
Moreover, powder detergent (Attack highly active bio-EX, the Kao Corporation make) was used as a powdery substance with which a bag is filled.

(2) Caking test The bag was opened from the notch in the container body of the box-shaped container, the lid was closed, and the container was stored for 1 month at 30 ° C. and 40-80% RH cycle conditions (cycle period: 48 hr). During this storage, 50 g of powdered material was taken out with a weighing soup once every 7 days assuming actual use.
After storage, the solidified state of the powdery substance was evaluated according to the following evaluation criteria.
Evaluation criteria ◎: No caking ○: No caking △: There is caking, but there is no problem in practical use ×: There is caking

  From Table 1, when the bag is housed in a box-shaped container having no locking portion, the difference between the depth H2 of the container body 30 and the length H1 from the bottom edge of the bag 10A to the notch 16 (ΔH = H2 When -H1) was in the range of -5 mm to +5 mm, almost no caking occurred. In particular, when ΔH = 0 (that is, completely flush), no caking occurred. On the other hand, when ΔH is larger than this range, caking is observed in the powdery substance in the bag, and when ΔH is smaller than this range, the powdery substance is taken out and enters between the bag and the container body. Some caking was observed in the powdery substance collected at the corner of the container body.

  In addition, when a box-shaped container having a locking part is used to lock the opening edge of the bag to the locking part, the powdery substance is also interposed between the bag and the container body by taking out the powdery substance. Hardly accumulated, and no caking occurred in the bag or between the bag and the container body.

  The box-shaped container of the present invention is useful as a container for powdered substances such as powder detergents.

1 box container 10A, 10B bag 11 gusset 12 side seal (up-down direction seal)
12a Oblique seal part 13 Top seal 14 Hem seal 15 Tear induction seal 16 Notch 20 Laser processing line 30 Container body 31 Folding piece 32 Notch 33 Locking part 40 Lid P Powdery substance W1 Outer width at the bottom of the bag W2 Bag width Width of outer method at top edge

Claims (8)

A bag made of a film filled with a powdery substance, which is housed as a refill bag in a box-shaped container body having an opening on the upper surface and having a lid covering the opening,
The film has tear straightness,
The bag has a gusset at the bottom, the top is a flat bag type, and the outer width of the bag is narrower at the bottom end than the top,
The circumference of the opening is approximately the same as the circumference of the inner dimension of the opening of the container body,
It has an opening start part on the side seal part,
The vertical length of the bag from the bottom edge of the bag to the opening start part is the difference from the depth of the container body so that the opening surface when the bag is opened and the opening surface of the container body are flush with each other. Is a bag of 5 mm or less and less than the depth of the container body. In the area where the gusset is formed, the seal part on both sides is an oblique seal part inclined with respect to the bottom edge of the bag, and the angle between the edge of the oblique seal part and the extension line of the bottom edge is , claim 1 Symbol placing bag is 40 to 50 °. The bag according to claim 1 or 2 , wherein the film is selected from a polyester film, a polyamide film, or an olefin-based film. The bag according to any one of claims 1 to 3 , wherein the film has a thickness of 40 to 200 µm. The bag according to any one of claims 1 to 4 , wherein the bulk density of the powdery substance contained in the bag is 700 g / L or more. The use method of the bag which puts the bag in any one of Claims 1-5 in a box-shaped container main body, and opens from the opening start part in the state which put the bag in the container main body. A box-shaped container comprising the bag according to any one of claims 1 to 5 , a box-shaped container main body containing the bag, and a lid that covers an opening of the container main body. The box-shaped container of Claim 7 in which a container main body has a latching | locking part which latches the opening edge part of a bag.

Images