JP6641686B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag made of a resin film in which contents are packaged.

  A conventional packaging bag is disclosed in Patent Document 1. The packaging bag is formed by thermally bonding a resin film, and both ends in the vertical direction of the cylindrical resin film containing the contents are closed by thermal bonding. The peripheral surface of the packaging bag is connected to the opposing front and back portions by bending the resin film by gussets on both sides.

  A pair of perforated opposing cut portions extend in the left-right direction at the upper portion of the front portion, and the left end of the cut portion is formed at the front of the left gusset. A first cut is formed at the front of the right gusset. The first cut is formed in a U-shape in which two points on the resin film protrude backward and are connected. Between the first cut and the cut portion, a C-shaped second cut that extends from the first cut to the cut portion is provided. Further, a label is attached to both the gusset part and the front part so as to cover the first cut and the second cut.

  In the packaging bag having the above configuration, when the user peels off the label in the circumferential direction, the resin film inside the first cut and the second cut is pulled by the label, so that the resin film is cut into the second cut from both ends of the first cut. And it breaks continuously to a cutting part and is cut out in a belt shape. As a result, the packaging bag is opened by forming openings at the front and front portions of the gusset, and the user can take out the contents via the openings.

JP-A-9-142523 (page 5, FIG. 8 to FIG. 10)

  However, according to the above-mentioned conventional packaging bag, the front portion above the opening is apt to be caught by the contents when the contents are opened and the contents are taken out. For this reason, there was a problem that the convenience of the packaging bag was poor.

  An object of the present invention is to provide a packaging bag containing contents that can improve convenience.

In order to achieve the above object, the present invention provides a method of bending a resin film having at least a base material layer and a heat-adhesive resin layer so that the front and back heat-adhesive resin layers facing each other are heated at both upper and lower edges. In packaging bags that adhere and seal and store the contents,
Opening start part formed on one of the front part and the back part,
A band-shaped label attached to cover the opening start portion,
Comprising a notch in which the opening start portion projects and connects two points aligned in a predetermined direction in a direction orthogonal to each other,
The label extends in a direction opposite to a direction in which the opening start portion protrudes, and is arranged over the front surface portion and the rear surface portion.

  According to this configuration, when the user peels the label in the extending direction, the resin film inside the opening start portion is pulled by the label. Then, the resin film breaks from the opening start portion, and a band-shaped opening is formed over the front surface and the back surface, and the packaging bag is opened.

  Further, the present invention provides the packaging bag having the above configuration, further comprising: a gasket seal portion protruding from the rear portion and extending in a vertical direction, and forming the opening start portion on the opposite side of the tilting direction of the gasket seal portion on the rear portion. It is preferable.

  Further, according to the present invention, in the packaging bag having the above configuration, it is preferable that the base material layer is formed of a uniaxially stretched film, and a stretching direction of the uniaxially stretched film coincides with a direction orthogonal to the predetermined direction.

  Further, according to the present invention, in the packaging bag having the above configuration, it is preferable that the base material layer is formed of a uniaxially stretched polypropylene film.

  According to the present invention, the label covering the opening start portion, which is formed by a notch protruding in one direction, extends in the direction opposite to the direction in which the opening start portion protrudes, and is adhered to the front portion and the back portion. As a result, when the label is pulled in the extending direction, the resin film breaks from both ends of the opening start portion, and an opening is formed over the front part and the back part. Therefore, the contents are less likely to be caught in the packaging bag when the contents are taken out, the contents can be easily taken out, and the convenience of the packaging bag can be improved.

Front view of the packaging bag according to the first embodiment of the present invention. Rear view of the packaging bag according to the first embodiment of the present invention The front view at the time of opening of the packaging bag of 1st Embodiment of this invention. A perspective view of a winding body used for forming a packaging bag according to the first embodiment of the present invention. The perspective view which shows the manufacturing process of the packaging bag of 1st Embodiment of this invention. Front view of a packaging bag according to a second embodiment of the present invention. Rear view of a packaging bag according to a second embodiment of the present invention The front view at the time of opening of the packaging bag of 2nd Embodiment of this invention.

<First embodiment>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a front view and a rear view, respectively, of the packaging bag of the present embodiment. The pillow-type packaging bag 10 bends and thermally bonds the resin film 3 to seal and store the contents S such as stick-shaped confectionery. The resin film 3 is formed by sequentially laminating a base material layer, a barrier layer, and a thermo-adhesive resin layer (all not shown) from the outer surface side to the inner surface side.

  The base material layer of the resin film 3 is formed of, for example, a uniaxially stretched polypropylene film (uniaxially stretched film) having a thickness of 25 μm. The stretching direction of the uniaxially stretched polypropylene film coincides with the direction in which the later-described edge seal portions 16 and 17 extend (the left-right direction in FIGS. 1 and 2). The barrier layer for preventing the transmission of water vapor or the like is formed of, for example, a 12 μm-thick polyethylene terephthalate film on which aluminum is deposited. The barrier layer may be formed of a polyethylene terephthalate film or aluminum foil on which silica has been deposited. The thermoadhesive resin layer is formed of, for example, an easy peel film having a thickness of 30 μm, and the opposing thermoadhesive resin layers are thermally bonded to each other. The easy peel film has a two-layer structure of, for example, polyethylene and an ethylene copolymer.

  The packaging bag 10 is formed into a tubular shape by heat bonding at a back and forth gasket seal portion 13 extending vertically, and the upper and lower edges of the opposing front and rear portions 11 and 12 are thermally sealed by edge seal portions 16 and 17. Bonded and sealed. The product name, design, etc. of the contents S are printed on the front part 11. The upper and lower seal portions 13 are pressed at the time of thermal bonding by the heat sealer 20 (see FIG. 5), and are tilted to the left in FIG.

  The resin film 3 on the upper part of the back surface part 12 is provided with a cut 5 penetrating therethrough. The cut 5 is formed of a continuous straight line and is formed in a U-shape that is convex in the direction in which the edge seal portions 16 and 17 extend. The cut 5 is disposed on the opposite side (right side in FIG. 2) of the inclination direction with respect to the palm joint seal portion 13 with the open end facing the opposite side of the palm joint seal portion 13.

  Note that the shape of the cut 5 is not limited to the U-shape, and may be, for example, a semicircle, a U-shape, or the like. That is, the cut 5 projects and connects two points arranged in the vertical direction on the resin film 3 in a direction orthogonal to the direction (a direction in which the edge seal portions 16 and 17 extend). Further, the cuts 5 may be formed by perforations.

  The label 4 covers the cut 5, extends in the direction opposite to the direction in which the cut 5 protrudes, and is attached over the front part 11 and the back part 12. The label 4 is formed in a home base shape in a front view, and has a sticky sticking portion 4a stuck to the resin film 3 and a non-sticking holding portion 4b adjacent to the sticking portion 4a. The sticking portion 4a covers the cut 5 and the holding portion 4b is arranged on the side opposite to the open end of the cut 5. At this time, the holding portion 4 b is disposed between the cut 5 and the palm seal portion 13 on the back surface 12.

  The label 4 has a base layer (not shown) made of, for example, polyethylene terephthalate having a thickness of 10 μm. An adhesive layer (not shown) having a thickness of, for example, 30 to 40 μm is formed on one surface of the base material layer of the attaching portion 4a and the holding portion 4b, and the holding portion 4b is formed of, for example, a silicone resin on the adhesive layer. The non-adhesive layer is formed by forming a paste-killing layer. Thereby, the thickness of the label 4 is formed to be 50 μm or less.

  FIG. 3 shows a front view of the packaging bag 10 when opened. When the user grips the grip portion 4b and peels off the label 4 in the extending direction, the inside of the cut 5 is pulled by the label 4 and separates from the rear portion 12. As a result, the opening of the packaging bag 10 is started, and the cut 5 forms an opening start portion for starting the opening. When the label 4 is further pulled, the resin film 3 breaks from both ends of the notch 5 and is torn in a band shape accompanying the label 4. When the label 4 which has been peeled off from the rear portion 12 to the end on the front portion 11 is further pulled, the strip-shaped resin film 3 extends from the end of the label 4 and is torn.

  As a result, an opening 14 extending from the back portion 12 to the front portion 11 is formed, and the packaging bag 10 is opened. At this time, since the label 4 is adhered along the extending direction of the base material layer of the resin film 3, the opening 14 extending from the rear surface 12 to the entire front surface 11 can be easily formed.

  When the packaging bag 10 is opened, the contents S are taken out through the opening 14 by turning the upper side of the opening 14 backward. At this time, since the opening 14 is formed from the front part 11 to the rear part 12, the contents S are less likely to be caught in the packaging bag 10 when the contents S are taken out. Therefore, the convenience of the packaging bag 10 can be improved.

  Further, when the packaging bag 10 is opened, the opening 14 is formed in the upper portion of the packaging bag 10, so that the contents S can be prevented from falling. In addition, since the label 4 is attached to a part of the front portion 11 of the packaging bag 10, the display of the product name, design, and the like is more hindered than when the label 4 is attached to the entire left and right ends of the front portion 11. Absent.

  Further, since the notch 5 is formed on the back surface 12 on the side opposite to the tilting direction of the palm joint portion 13, the user can easily hold the holding portion 4b.

  FIG. 4 is a perspective view of the winding body 1 used for forming the packaging bag 10. The arrow R indicates the direction in which the resin film 3 is wound. The winding body 1 has a core material 2 made of corrugated cardboard having a cylindrical shape, and a band-shaped resin film 3 wound around the core material 2. The width D of the resin film 3 is about 80 mm.

  In the winding body 1, the stretching direction of the uniaxially stretched polypropylene film of the base material layer of the resin film 3 matches the direction perpendicular to the winding direction of the resin film 3. A plurality of cuts 5 are formed at a predetermined cycle (for example, a cycle of 143 mm) in the winding direction. The cut 5 is formed in a U-shape that is convex in a direction perpendicular to the winding direction, and is disposed on the left side of the widthwise central portion of the resin film 3. The cuts 5 project and connect two points on the resin film 3 in a direction perpendicular to the winding direction, and both ends of the cuts 5 are arranged in the winding direction.

  The labels 4 are respectively attached to the resin films 3 so as to cover the respective cuts 5. Since the thickness of the label 4 is 50 μm or less, irregularities on the resin film 3 of the winding body 1 can be reduced. Therefore, even if the label 4 is adhered to the resin film 3 wound around the core material 2, wrinkles on the resin film 3 can be reduced.

  FIG. 5 shows a process of manufacturing the packaging bag 10 containing the contents S from the winding body 1. The arrow DR indicates the direction in which the resin film 3 is pulled out. The winding body 1 having the above structure is attached to a roller of a bag making machine (not shown) such as a pillow wrapping machine, and the resin film 3 is moved from the winding body 1 to the arrow DR with the open end 6 of the resin film 3 in the drawing direction. In the direction of. The contents S are arranged on the pulled-out resin film 3, and the resin film 3 is guided by a guide member (not shown) to form the cylindrical resin film 3. The contents S are wrapped by the tubular resin film 3.

  Then, both side edges of the cylindrical resin film 3 are heat-bonded to each other by a heat sealer (not shown) to form the joint seal portion 13. After that, both ends of the tubular resin film 3 in the drawing direction are thermally bonded by the heat sealer 20. Thereby, the edge sealing portions 16 and 17 are formed. Then, both ends of the tubular resin sheet 3 in the drawing direction are cut by the blade 21. Thereby, the packaging bag 10 in which the contents S are packaged is continuously formed.

  Through the above steps, the owner of the bag making machine can easily manufacture the packaging bag 10 that is opened by peeling off the label 4.

  According to the present embodiment, the label 4 that covers the opening start portion formed of the cutout 5 that protrudes in one direction extends in the direction opposite to the direction in which the opening start portion protrudes, and is attached to the front portion 11 and the back portion 12. Thereby, when the label 4 is pulled in the extending direction, the resin film 3 is broken from both ends of the opening start portion, and an opening 14 is formed over the front surface 11 and the back surface 12. Therefore, the contents S are less likely to be caught in the packaging bag 10 when the contents S are taken out, the contents S can be easily taken out, and the convenience of the packaging bag 10 can be improved.

  Also, a cut 5 is formed on the back surface 12 on the opposite side of the tilting direction of the joint palm seal portion 13. Thereby, the user can easily hold the holding portion 4b.

  Further, the base material layer is formed of a uniaxially stretched polypropylene film (uniaxially stretched film), and the stretching direction of the uniaxially stretched polypropylene film coincides with the direction orthogonal to the direction in which both ends of the cut 5 are arranged. Thereby, when the user grips the gripping portion 4b and pulls in the direction in which the label 4 extends, the resin film 3 is easily broken. Therefore, the easy opening property of the packaging bag 10 can be further improved.

  Further, since the base material layer is formed of the uniaxially stretched polypropylene film, wrinkles of the front part 11 and the back part 12 can be reduced, and the strength of the packaging bag 10 can be easily improved.

  In the present embodiment, the notch 5 is provided in the rear part 12, but the notch 5 is provided in the front part 11 instead of the notch 5 in the rear part 12, and the notch 5 of the front part 11 may be covered with the label 4. Good.

<Second embodiment>
Next, a second embodiment of the present invention will be described. 6 and 7 show a front view and a rear view of the packaging bag of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals. The present embodiment differs from the first embodiment in that the packaging bag 10 omits the gasket seal portion 13 and has a three-sided seal type in which three sides (an upper edge, a lower edge, and a right edge in FIG. 6) are thermally bonded. Is different. Other parts are the same as in the first embodiment.

  In the packaging bag 10, the resin film 3 is bent at the bent portion 15, and two opposite edges (a lower edge and a right edge in FIG. 6) of the facing front portion 11 and the rear portion 12 are respectively edge sealing portions 17, 18. In FIG. 6, the contents are stored through an upper opening (not shown) in FIG. 6, and then the opening is thermally bonded to form an edge sealing portion 16. In the upper left portion (the right side in FIG. 7) of the back surface portion 12 of the packaging bag 10, a U-shaped notch 5 is formed which is convex in the direction in which the edge seal portions 16 and 17 extend (the left and right direction in FIG. 7). Is done.

  The label 4 covers the cut 5, extends in the direction opposite to the direction in which the cut 5 protrudes, and is attached over the front part 11 and the back part 12. At this time, the holding portion 4b of the label 4 is disposed on the back surface 12 to the right of the cut 5 (to the left in FIG. 7).

  FIG. 10 shows a front view of the packaging bag 10 when opened. In the packaging bag 10 having the above configuration, when the user grips the gripping portion 4b and peels off the label 4 in the extending direction, the resin film 3 is broken like the first embodiment, and the resin film 3 is broken from the rear portion 12 to the front surface. An opening 14 extending to the part 11 is formed. Thereby, the packaging bag 10 is opened, and the user can take out the contents S through the opening 14.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. In addition, since the joint seal portion 13 is omitted, the degree of freedom in the arrangement of the cuts 5 is increased.

  INDUSTRIAL APPLICATION This invention can be utilized for the packaging bag which consists of a resin film which wrapped the content.

DESCRIPTION OF SYMBOLS 1 Winding body 2 Core material 3 Resin film 4 Label 4a Sticking part 4b Nipping part 5 Notch 6 Open end 10 Packaging bag 11 Front part 12 Back part 13 Joint seal part 14 Opening part 15 Bending part 16, 17, 18 end Edge seal 20 Heat sealer 21 Blade S Contents

Claims (3)

The front and rear heat-adhesive resin layers of the front and rear portions, which are arranged so as to face each other via a bent side edge formed by bending a resin film having at least a base material layer and a heat-adhesive resin layer, In a packaging bag that is heat-bonded with and seals the contents inside,
A notch that is formed on only one of the front part and the rear part and projects and connects in the direction orthogonal to the bent side edge in the direction opposite to the side of the bent side edge,
A band-shaped label attached to the outside covering the cut,
With
It is formed in a three-sided seal type, and the upper and lower end edges are heat-sealed, and one of the left edge and the right edge as viewed from the front is heat-sealed,
The other side edge of the left edge and the right edge is the bent side edge,
The bent side edge is provided only one,
The label is at one of the front portion and the rear portion and the notch is formed, a pre-Symbol further than the end protruding switching inclusive shifted in a direction in which the projection of the incision positions and start the Extending to the bent side edge, and further extending to the vicinity of the bent side edge and terminating at the other of the front portion and the rear portion where the cut is not formed, the front portion and A packaging bag, wherein the packaging bag is arranged not on the entire circumference but on a part of the rear surface.   The packaging bag according to claim 1, wherein the base material layer is formed of a uniaxially stretched film, and a stretching direction of the uniaxially stretched film matches a direction orthogonal to the predetermined direction.   The packaging bag according to claim 2, wherein the base material layer is formed of a uniaxially stretched polypropylene film.

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