JP2019026375A - Packaging bag - Google Patents

Abstract

To provide a packaging bag which can be improved in usability.SOLUTION: A packaging bag 1 which comprises a bag body 2 having a peripheral edge sealed with a seal part 21 and a zipper tape 3 arranged on an inner surface of an upper part of the bag body 2, and stores contents S in a storage part 4 below the zipper tape 3 is characterized in that: the zipper tape 3 has a male part 32 and a female part 31 meshing each other; the female part 31 has a first base part 31a extending to the right and left direction and a pair of engaging claws 31c, 31d protruding from the first base part 31a; the male part 32 has a second base part 32a extending to the right and left direction, a column part 32b stood on the second base part 32a, and engagement parts 32c, 32d arranged at a tip part of the column part 32b and engaging the engaging claws 31c, 31d; a height H from on the second base 32a to the male part 32 is smaller than a shortest width W of the column part 32b; the male part 32 is sealed to an inner surface of the bag body 2 in an adhesion region HS2 right below the column part 32b; and the female part 31 is sealed to the inner surface of the bag body 2 in an adhesion region HS1 right below between the pair of engaging claws 31c, 31d.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packaging bag including a zipper tape in which a male part and a female part are engaged with each other.

  A conventional packaging bag is disclosed in Patent Document 1. This packaging bag is provided with a zipper tape, and the front part and the back part facing each other are thermally bonded by a peripheral seal part. The zipper tape has a male part and a female part that mesh with each other, and the male part and the female part are thermally bonded to the inner surfaces of the front surface part and the back surface part, respectively. A storage part is formed below the zipper tape inside the packaging bag, and the contents are stored in the storage part. Moreover, a notch part is provided in the side edge above the zipper tape of a packaging bag.

  The female portion has a first base portion extending in the left-right direction and a pair of engaging claws protruding from the first base portion. The male portion includes a second base portion extending in the left-right direction, a column portion standing on the second base portion, and an engagement portion that is disposed on the tip portion of the column portion and engages with the engagement claw. The engaging portion engages with the engaging claw and the zipper tape is closed.

  In the packaging bag having the above configuration, when the user grips the front surface portion and the back surface portion and breaks the front surface portion and the back surface portion from the cutout portion, the packaging bag is opened. When the upper ends of the broken front and back portions are gripped and pulled away from each other, the engagement between the engagement portion and the engagement claw is released, and the zipper tape is opened. Thereby, the user can take out the contents. The remaining contents can be preserved by closing the zipper tape after removing a portion of the contents.

International Publication No. 2013/046562 (6th, 7th, 10th, 2nd, 4th)

  According to the conventional packaging bag, when the powdered content is taken out from the packaging bag, a part of the content may be accumulated between the engaging claws of the female portion of the zipper tape. For this reason, there has been a problem that the zipper tape is bitten and the zipper tape cannot be closed reliably, and the usability of the packaging bag is lowered.

  An object of this invention is to provide the packaging bag which can improve usability.

In order to achieve the above object, the present invention comprises a bag body whose peripheral edge is sealed by a seal portion, and a zipper tape disposed on the inner surface of the upper portion of the bag body, and in the storage portion below the zipper tape. In the packaging bag that stores the contents in
The zipper tape has a male part and a female part that mesh with each other,
The female part has a first base extending in the left-right direction and a pair of engaging claws protruding from the first base,
The male part includes a second base part extending in the left-right direction, a column part erected on the second base part, and an engagement part that is disposed on a tip part of the pillar part and engages with the engagement claw. Have
The height of the male part from above the second base part is smaller than the shortest width of the column part,
The male part is sealed to the inner surface of the bag main body in a region directly below the column part, and the female part is sealed to the inner surface of the bag main body in a region immediately below the pair of engaging claws. It is characterized by being in a state.

  According to the present invention, in the packaging bag configured as described above, it is preferable that the gap between the engaging claws of the female portion is formed in a flat surface, and the tip of the male portion is formed in a flat surface or a concave surface.

  In the packaging bag having the above-described configuration, the present invention preferably includes a concave portion extending in the left-right direction at the top of the male portion.

  In the packaging bag having the above-described configuration, it is preferable that the lower end of the concave portion is disposed above the lower end of the engaging portion.

  According to the present invention, in the packaging bag configured as described above, it is preferable that a cavity extending in the left-right direction is provided in the column portion.

  According to the present invention, in the packaging bag configured as described above, the distance between the engaging claws of the first base portion is preferably 3 mm or more.

  According to the present invention, the height of the male part from the second base part is smaller than the shortest width of the column part. Thereby, the height of the male part can be suppressed even if the width of the column part is increased and the length between the engaging claws of the first base part is increased. Therefore, the contents can be prevented from accumulating between the engaging claws of the female portion, and the zipper tape can be prevented from being bitten. Further, when the male part and the female part are engaged with each other, it is possible to prevent the column part from being inclined with respect to the second base part and to prevent the zipper tape from being opened against the user's will. Furthermore, the male part is in a state sealed to the inner surface of the bag main body in the region immediately below the column part, and the female part is in a state sealed to the inner surface of the bag main body in the region immediately below between the pair of engaging claws. . Thereby, inclination of the column part with respect to a bag main body can be prevented more. As a result, the usability of the packaging bag can be improved.

The front view which shows the packaging bag before opening of 1st Embodiment of this invention. Side surface sectional drawing which shows the packaging bag of 1st Embodiment of this invention. The front view which shows the packaging bag after opening of 1st Embodiment of this invention Side surface sectional drawing which shows the packaging bag of the modification of 1st Embodiment of this invention. Side surface sectional drawing which shows the packaging bag of 2nd Embodiment of this invention. Side surface sectional view which shows the packaging bag of 3rd Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the packaging bag of the present embodiment. In addition, in FIG. 1, the packaging bag before opening is shown. The packaging bag 1 is formed by a so-called standing pouch, and has a bag body 2 and a zipper tape 3. The zipper tape 3 is formed of resin and is disposed on the inner surface of the upper portion of the bag body 2.

  The bag body 2 has a front surface portion 5 and a back surface portion 6 facing each other, with the resin sheet 100 overlapped and the periphery thereof sealed (thermally bonded) by the seal portion 21. Further, at the lower end portions of the front surface portion 5 and the back surface portion 6, the periphery of the bottom surface portion 8 made of the resin sheet 100 folded in half is sealed by the seal portion 21. The bottom surface portion 8 has a plurality of unbonded portions 9 that are not thermally bonded at the left and right end portions, respectively. The unbonded portion 9 can prevent bubbling or curling of the bottom surface portion 8 during the heat bonding process.

  A storage portion 4 for storing the contents S is formed below the zipper tape 3 of the bag body 2. The content S is, for example, powdered food (wheat flour, powdered milk, etc.) or powdered medicine.

  In addition, V-shaped notches 29 are formed on the seal portions 21 on both side edges of the bag body 2 above the zipper tape 3. In addition, you may provide the cut line (not shown) which half-cuts the front-surface part 5 and the back surface part 6, and connects the notch part 29 on either side substantially.

  Information (characters, designs, etc.) on the contents S is printed on the outer surfaces of the front surface portion 5 and the back surface portion 6. In addition, the information printed on the outer surface of the front surface part 5 and the back surface part 6 may be other information (for example, a picture of a landscape, etc.) other than the information related to the contents S. In addition, sheets on which information about the contents S and other information are printed may be attached to the outer surfaces of the front surface portion 5 and the back surface portion 6.

  The resin sheet 100 is formed by, for example, laminating a base material layer, a printing layer, an adhesive layer, an intermediate layer, an adhesive layer, and a sealant layer (all not shown) in order from the outside to the inside of the bag body 2. The base material layer is formed of, for example, a biaxially stretched vapor-deposited polyethylene terephthalate film having a thickness of about 12 μm. The printing layer is formed to a thickness of about 1 to 5 μm with ink disposed at a predetermined position on the base material layer.

  The intermediate layer is formed, for example, by vapor-depositing silica or the like on a biaxially stretched nylon film having a thickness of about 15 μm, and prevents permeation of water vapor, oxygen and the like. For example, a polyethylene terephthalate film or an aluminum foil on which an organic oxide or an inorganic oxide is deposited may be used as the intermediate layer. The sealant layer (thermal adhesive resin layer) is formed of, for example, an unstretched polypropylene (CPP) film having a thickness of about 60 μm, and the sealant layers facing each other are sealed. The adhesive layer that bonds the base material layer including the printed layer and the intermediate layer and the adhesive layer that bonds the intermediate layer and the sealant layer are each formed to a thickness of about 5 μm by a dry lamination method.

  For example, the resin sheet 100 may be formed by laminating a base material layer, an intermediate layer, a printing layer, an adhesive layer, an intermediate layer, an adhesive layer, and a sealant layer in order from the outer side to the inner side of the bag body 2.

  FIG. 2 shows a side sectional view through the zipper tape 3 of the packaging bag 1. The zipper tape 3 has a female part 31 and a male part 32 that mesh with each other. The female part 31 has a first base part 31a and a pair of engaging claws 31c and 31d. The first base portion 31 a is formed in a belt shape, extends in the left-right direction (first direction) in FIG. 1, and is disposed on the inner surface of the back surface portion 6. A space between the engaging claws 31c and 31d of the first base portion 31a is formed as a flat surface. For example, polyethylene can be used as the material of the first base portion 31a.

  The pair of engaging claws 31c and 31d protrude upward (forward in FIG. 2) from both end portions (upper and lower ends in FIG. 2) of the first base portion 31a. The tips of the engaging claws 31c and 31d are bent in a direction approaching each other.

  The male portion 32 includes a second base portion 32a, a column portion 32b, and a pair of engaging portions 32c and 32d. The second base portion 32 a is formed in a belt shape, extends in the left-right direction in FIG. 1, and is disposed on the inner surface of the front surface portion 5. The second base portion 32a is disposed to face the first base portion 31a. For example, polyethylene can be used as the material of the second base portion 32a. The column part 32b is erected on the second base part 32a. Thereby, the column part 32b protrudes upward (backward in FIG. 2) from the 2nd base part 32a.

  Both side surfaces (upper surface and lower surface in FIG. 2) of the column part 32b are inclined in directions away from each other as they go upward (on the first base 31a side in FIG. 2). The height H of the male part 32 from above the second base part 32a is smaller than the shortest width W of the column part 32b. Moreover, the front-end | tip of the male part 32 is formed in the plane.

  The engaging portions 32c and 32d are arranged at the distal end portion of the column portion 32b. The engaging portion 32c protrudes outward (upward in FIG. 2) from one side surface (upper surface in FIG. 2) of the column portion 32b and bends downward (second base 32a side in the drawing). The engaging portion 32d protrudes outward (downward in FIG. 2) from the other side surface (lower surface in FIG. 2) of the column portion 32b and bends downward (second base 32a side in FIG. 2). The male part 32 is fitted between the engaging claws 31c and 31d of the female part 31, and the engaging parts 32c and 32d are engaged with the engaging claws 31c and 31d, respectively.

  The first base portion 31a is sealed to the back surface portion 6 at an adhesive region HS1 directly below the engaging claws 31c and 31d. The second base portion 32a is sealed to the front surface portion 5 by an adhesion region HS2 directly below the column portion 32b. In the present embodiment, the adhesion region HS1 and the adhesion region HS2 face the column part 32b in the front-rear direction in FIG. Further, the first base portion 31a and the second base portion 32a are respectively sealed at the back portion 6 and the front portion 5 at one place.

  The zipper tape 3 is sandwiched between the front surface portion 5 and the back surface portion 6 in a state where the female portion 31 and the male portion 32 are engaged with each other. Then, a spacer (not shown) is arranged so that the male part 32 and the female part 31 are sandwiched between the front part 5 and the rear part 6. Next, the zipper tape 3 and the spacer interposed between the front surface portion 5 and the back surface portion 6 are pressed by a pair of pressure portions of a heat seal device (not shown) in the front-rear direction in FIG. As a result, the zipper tape 3 is sealed to the inner surfaces of the front surface portion 5 and the back surface portion 6 by the adhesion region HS2 and the adhesion region HS1, respectively. At this time, since the tip of the male part 32 and the engaging claws 31c, 31d of the first base part 31a are formed in a plane, damage due to deformation of the male part 32 and the female part 31 can be prevented.

  The packaging bag 1 having the above configuration is formed with the upper end of the bag body 2 unsealed, and the contents S are filled into the storage unit 4 from above by opening the zipper tape 3. Thereafter, the upper end portions of the front surface portion 5 and the back surface portion 6 are sealed by a heat seal device or the like, and the seal portion 21 is formed above the zipper tape 3. Thereby, the bag main body 2 is sealed in a state where the contents S are stored in the storage unit 4.

  When the user breaks the upper portion of the bag body 2 from the notch portion 29, the packaging bag 1 is opened. FIG. 3 is a front view showing the packaging bag 1 after opening. Next, the user can open the zipper tape 3 and take out the contents S. Then, the user closes the zipper tape 3 after taking out a part of the contents S. Thereby, the remaining contents S can be preserve | saved.

  At this time, the height H of the male portion 32 from above the second base portion 32a is smaller than the shortest width W of the column portion 32b. Accordingly, the height H of the male portion 32 can be suppressed even if the width of the column portion 32b is increased and the length between the engaging claws 31c and 31d of the first base portion 31a is increased. Therefore, even if the contents S enter between the engaging claws 31c and 31d of the female part 31, it becomes easy to drop off and the biting of the zipper tape 3 can be prevented. Moreover, when the male part 32 and the female part 31 are engaged, the tilting of the column part 32b with respect to the second base part 32 can be prevented, and the opening of the zipper tape 3 contrary to the intention of the user can be prevented.

  In addition, it is desirable that the distance L between the engaging claws 31c and 31d of the first base portion 31a is 3 mm or more because the retention of the contents S between the engaging claws 31c and 31d can be further prevented.

  FIG. 4 is a side sectional view showing a modification of the packaging bag 1 of the present embodiment. The female part 31 may have extending portions 31e and 31f extending outward (upward and downward in FIG. 4) from both side ends (upper and lower ends in FIG. 4) of the first base 31a. Further, the male portion 32 may have extending portions 32e and 32f extending outward (upward and downward in FIG. 4) from both side ends (upper and lower ends in FIG. 4) of the second base portion 32a. Good. In this case, the adhesion region HS1 is formed immediately below the extending portions 31e and 31f, and the adhesion region HS2 is formed immediately below the extending portions 32e and 32f. At this time, the adhesion regions HS1 and HS2 are not formed immediately below the engagement claws 31c and 31d and directly below the column portion 32b.

  As shown in FIG. 2, when the second base portion 32a is sealed to the front surface portion 5 by the adhesion region HS2 directly below the column portion 32b, the adhesion region HS2 is not formed directly below the column portion 32b as shown in FIG. In comparison, tilting of the column part 32b with respect to the front surface part 5 can be further prevented.

  According to the present embodiment, the height H of the male part 32 from above the second base part 32a is smaller than the shortest width W of the column part 32b. Accordingly, the height H of the male portion 32 can be suppressed even if the width of the column portion 32b is increased and the length between the engaging claws 31c and 31d of the first base portion 31a is increased. Therefore, the contents S can be prevented from accumulating between the engaging claws 31c and 31d of the female portion 31, and the powder of the zipper tape 3 can be prevented. Moreover, when the male part 32 and the female part 31 are engaged, the tilting of the column part 32b with respect to the second base part 32 can be prevented, and the opening of the zipper tape 3 contrary to the intention of the user can be prevented. Furthermore, the male part 32 is in a state sealed to the inner surface of the bag body 2 at the adhesive region HS2 directly below the column part 32b, and the female part 31 is at the adhesive region HS1 directly below the pair of engaging claws 31c and 31d. It is in a state sealed to the inner surface of the bag body 2. Thereby, inclination of the column part 32b with respect to the front-surface part 5 can be prevented more. As a result, the usability of the packaging bag 1 can be improved.

  Further, the engagement claw 31c, 31d of the female part 31 is formed in a flat surface, and the tip of the male part 32 is formed in a flat surface. As a result, the column portion 32b is prevented from tilting while the distance between the engaging portions 32c and 32d of the male portion 32 is increased, and the engaging portions 32c and 32d and the engaging claws 31c and 31d are more reliably engaged. Can be made. In addition, the front-end | tip of the male part 32 may be formed in a concave surface.

  Moreover, when the distance L between the engaging claws 31c and 31d of the first base portion 31a is 3 mm or more, the retention of the contents S between the engaging claws 31c and 31d can be further prevented.

  In the present embodiment, the male portion 32 may be provided on the back surface portion 6 and the female portion 31 may be provided on the front surface portion 5.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 5 shows a side sectional view through the zipper tape 3 of the packaging bag 1 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the configuration of the male portion 32 of the zipper tape 3 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  A concave portion 32 h extending in the left-right direction (first direction) in FIG. 1 is provided at the top of the male portion 32. In the present embodiment, both ends of the recess 32h are opened, and the side cross section (cross section perpendicular to the first direction) of the recess 32h is substantially semi-elliptical. The side cross-sectional shape of the recess 32h is not limited to a substantially semi-elliptical shape, and may be, for example, a substantially rectangular shape or a substantially semi-circular shape.

  Thereby, when the male part 32 is inserted between the engaging claws 31c and 31d before the contents S that have entered between the engaging claws 31c and 31d of the female part 31 drop off from between the engaging claws 31c and 31d, The contents S between the engaging claws 31c and 31d are accommodated in the recess 32h. Therefore, the zipper tape 3 can be closed reliably.

  Further, the lower end (front end in FIG. 5) of the recess 32h is arranged above (rearward in FIG. 5) above the lower ends (front end in FIG. 5) of the engaging portions 32c and 32d. Accordingly, the engaging portions 32c and 32d engaged with the engaging claws 31c and 31d are not easily tilted in the direction away from the engaging claws 31c and 31d. Therefore, the opening of the zipper tape 3 contrary to the user's will can be further prevented.

  Moreover, since the recessed part 32h is provided in the top part of the male part 32, the amount of resin can be decreased rather than the zipper tape 3 of 1st Embodiment. For this reason, when the zipper tape 3 is sealed to the inner surface of the bag body 2, it is possible to suppress the accumulation of resin near the area where the seal portion 21 and the zipper tape 3 overlap.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Further, a concave portion 32 h extending in the left-right direction (first direction) is provided at the top of the male portion 32. Thereby, when the male part 32 is inserted between the engaging claws 31c and 31d before the contents S that have entered between the engaging claws 31c and 31d of the female part 31 drop off from between the engaging claws 31c and 31d, The contents S between the engaging claws 31c and 31d are accommodated in the recess 32h. Therefore, the zipper tape 3 can be closed more reliably and the usability of the packaging bag 1 can be further improved.

  Further, the lower end of the recess 32h is disposed above the lower ends of the engaging portions 32c and 32d. Accordingly, the engaging portions 32c and 32d engaged with the engaging claws 31c and 31d are not easily tilted in the direction away from the engaging claws 31c and 31d. Therefore, the opening of the zipper tape 3 contrary to the user's will can be further prevented.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 6 shows a side sectional view through the zipper tape 3 of the packaging bag 1 of the third embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the configuration of the male portion 32 of the zipper tape 3 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  A cavity 32k extending in the left-right direction (first direction) is provided in the column part 32b of the male part 32. In the present embodiment, both ends of the cavity 32k are open, and the side surface cross section (cross section perpendicular to the first direction) of the cavity 32k has a trapezoidal shape. The side cross-sectional shape of the cavity 32k is not limited to a trapezoidal shape, and may be, for example, a rectangular shape, a circular shape, or an elliptical shape.

  It is desirable that the upper surface (rear surface in FIG. 6) of the cavity 32k is disposed below (on the second base 32a side in FIG. 6) the lower end (front end in FIG. 6) of the engaging portions 32c and 32d. Accordingly, the engaging portions 32c and 32d engaged with the engaging claws 31c and 31d are not easily tilted in the direction away from the engaging claws 31c and 31d.

  Since the cavity 32k is provided, the male part 32 is placed between the engaging claws 31c and 31d before the contents S that have entered between the engaging claws 31c and 31d of the female part 31 fall off between the engaging claws 31c and 31d. When inserted, the contents S between the first base portion 31 a and the distal end of the male portion 32 press the distal end portion of the male portion 32. Thereby, the front-end | tip part of the male part 32 retracts | saves to the cavity 32k side, and the zipper tape 3 can be closed even in the state where the contents S have the engaging claws 31c and 31d remaining.

  Moreover, since the cavity 32k is provided in the column part 32b, the amount of resin can be reduced as compared with the zipper tape 3 of the first embodiment. For this reason, when the zipper tape 3 is sealed to the inner surface of the bag body 2, it is possible to suppress the accumulation of resin near the area where the seal portion 21 and the zipper tape 3 overlap.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Further, a hollow 32k extending in the left-right direction (first direction) is provided in the pillar portion 32b. Thereby, when the male part 32 is inserted between the engaging claws 31c and 31d before the contents S that have entered between the engaging claws 31c and 31d of the female part 31 drop off from between the engaging claws 31c and 31d, The contents S between the first base 31 a and the tip of the male part 32 press the tip of the male part 32. Thereby, the front-end | tip part of the male part 32 retracts | saves to the cavity 32k side, and the zipper tape 3 can be closed even in the state where the contents S have the engaging claws 31c and 31d remaining. Therefore, the usability of the packaging bag 1 can be further improved.

  In addition, you may provide the cavity 32k of this embodiment in the pillar part 32b of the male part 32 of 2nd Embodiment.

  Further, in the second and third embodiments, as shown in FIG. 4 of the first embodiment, the extending portions 31e, 31f, 32e, and 32f are provided, and the adhesion region HS1 is directly below the extending portions 31e and 31f. The adhesive region HS2 may be disposed immediately below the extending portions 32e and 32f.

  Moreover, in 1st Embodiment-3rd Embodiment, although the packaging bag 1 is formed of what is called a standing pouch, it is not limited to this. For example, the packaging bag 1 may be formed of a so-called three-side seal bag or a four-side seal bag.

  INDUSTRIAL APPLICATION This invention can be utilized for a packaging bag provided with the zipper tape in which a male part and a female part mutually bite.

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Bag main body 3 Zipper tape 4 Storage part 5 Front part 6 Back part 21 Seal part 29 Notch part 31 Female part 31a 1st base part 31c, 31d Engagement claw 32 Male part 32a 2nd base part 32b Pillar part 32c, 32d Engagement part 32h Concave part 32k Cavity 100 Resin sheet S Contents HS1, HS2 Bonding area

Claims (6)

In a packaging bag comprising a bag body whose periphery is sealed by a seal portion, and a zipper tape disposed on the inner surface of the upper portion of the bag body, and storing contents in a storage portion below the zipper tape,
The zipper tape has a male part and a female part that mesh with each other,
The female part has a first base extending in the left-right direction and a pair of engaging claws protruding from the first base,
The male part includes a second base part extending in the left-right direction, a column part erected on the second base part, and an engagement part that is disposed on a tip part of the pillar part and engages with the engagement claw. Have
The height of the male part from above the second base part is smaller than the shortest width of the column part,
The male part is sealed to the inner surface of the bag main body in a region directly below the column part, and the female part is sealed to the inner surface of the bag main body in a region immediately below the pair of engaging claws. A packaging bag characterized by being in a dry state.   The packaging bag according to claim 1, wherein a space between the engaging claws of the female portion is formed in a flat surface, and a tip of the male portion is formed in a flat surface or a concave surface.   The packaging bag according to claim 1 or 2, wherein a concave portion extending in a left-right direction is provided on a top portion of the male portion.   The packaging bag according to claim 3, wherein a lower end of the recess is disposed above a lower end of the engagement portion.   The packaging bag according to any one of claims 1 to 4, wherein a cavity extending in the left-right direction is provided in the column portion.   The packaging bag according to any one of claims 1 to 5, wherein a distance between the engaging claws of the first base portion is 3 mm or more.

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