JP2010269838A - Packaging bag and manufacturing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag which has an excellent opening property and hardly causes a bag breakage accident, and to provide a manufacturing method of the packaging bag. <P>SOLUTION: In the packaging bag, a front face 1 composed of a flexible packaging material and a back face 2 composed of a flexible packaging material are piled up and a space S to store a packaged article is formed between the front face 1 and the back face 2. A folding part 4 and 5 which are folded toward the space S from one end side of the front face 1 and one end side of the back face 2 are arranged, and the depth side edge 4a and 5a of both folding parts 4 and 5 are piled up and sealed in a peelable state. In both piled-up folding parts 4, 5, depth side edges are sealed to each other at least in a sawtooth shape or a wave shape, and a plurality of point seals are provided along the outside edge line. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  TECHNICAL FIELD The present invention relates to a packaging bag in which food such as confectionery, small articles, miscellaneous goods, and other items to be packaged is packaged so that it can be opened with a soft packaging material, and a method for manufacturing the packaging bag. The present invention relates to a packaging bag having a portion and a method of manufacturing the packaging bag.

  Various packaging bags are provided in which foods such as confectionery and other items to be packaged are packaged so that they can be opened with a soft packaging material. For example, Patent Document 1 describes a simple openable bag body that can be opened without slipping even with a finger with oil or moisture attached thereto.

  As shown in FIG. 6 (b), the simple openable bag body is made from a laminated film 100 in which a base material layer 101 and an easily peelable sealant layer 102 are laminated, as shown in FIG. 6 (a). As described above, the package (not shown) is wrapped with the easy-peelable sealant layer 102 facing inward, and the left and right side edge portions 110, 110 of the laminated film 100 are overlapped in a palm-on manner. .

  The overlapped left and right side edge portions 110, 110 are provided with easy peel portions 112 welded in a strip shape with the non-welded portions 111, 111 remaining on the tip side. Anti-slip portions 113 and 113 are formed on the outer surface of the easily peelable sealant layer 102 in the non-welded portions 111 and 111. Further, the simple openable bag body is formed by forming end welded portions 120 and 120 in the direction intersecting the easy peel portion 112 at both ends in the longitudinal direction.

  In such a simple openable package, the easy-peel portion 112 can be peeled off in a double-spreading manner by opening the non-welded portions 111, 111 with fingers and pulling them in the left-right direction.

Japanese Patent Laid-Open No. 10-181770

  Biaxially stretched polypropylene (OPP) film is frequently used as the soft wrapping material, but the OPP film cannot be heat sealed. For this reason, there is provided a part-coated bag in which only a part to be heat-sealed is part-coated with a heat-sensitive adhesive so that it can be sealed alone.

  This part coat bag is difficult to seal completely, especially if it has a crease like a pillow type or gusset type, and a pinhole is formed, and air enters inside from this pinhole. Internal pressure may occur.

  Then, in the simple openable bag described in Patent Document 1, when the OPP film is used, the non-welded portions 111 and 111 are peeled off in a double-spread shape, and thus the internal pressure of the simple openable bag increases. As a result, the easy peel portion 112 may be peeled off and a so-called bag breaking accident may occur.

  Then, this invention makes it a subject to provide the packaging bag which was excellent in openability, and also made it hard to produce a bag breaking accident, and the manufacturing method of this packaging bag.

  The packaging bag according to the present invention is a packaging bag in which a front portion made of a soft wrapping material and a back portion made of a soft wrapping material are overlapped, and a space for storing an object to be packaged is provided between the front and back portions. In this case, there are provided folding portions that are folded from the one end side of the front portion and the one end side of the back portion toward the space portion, and the back side edges of both folding portions overlap and can be peeled off. It is characterized by being sealed.

  According to this packaging bag, two folding parts are provided, and the back side edges of the two folding parts are overlapped with each other and sealed so as to be peelable, thereby sealing an object to be packaged in the space part. be able to. And by peeling this seal | sticker, the back side edge parts of both folding parts can space apart, and the to-be-packaged object in a space part can be discharged | emitted from between both folding parts. And as for this packaging bag, even if the internal pressure in a space part becomes large because two folding parts are folded toward the space part, air does not enter between a folding part and a folding part, therefore It is assumed that the seals between the back edge portions of the two folded portions do not peel off.

  Further, in the packaging bag according to the present invention, the overlapping folding portions are sealed at the back edge portions at least in a sawtooth shape or a wave shape, and a plurality of point seals are given on the opening side. preferable.

  According to this packaging bag, the inner edges of the overlapping folding portions are sealed in a sawtooth shape or a wave shape, so that the seal is easily peeled off from the top of many peaks. . Since a plurality of point seals are applied on the opening side, a certain force is applied, and after the point seals are peeled off, the sawtooth or wave shaped seals are peeled off. In other words, the packaging bag is opened after the point seal is peeled off even if the sawtooth or wave-shaped seal is easily peeled off.

  Further, in the packaging bag according to the present invention, the folded edge portion which is a boundary portion between the front portion and the folded portion and the folded edge portion which is a boundary portion between the back portion and the folded edge portion are sealed in a band shape, respectively. It is preferable that

  According to this packaging bag, the folded edge is sealed in a band shape, so that the folded edge can be reinforced and the packaged material can be prevented from entering the folded edge. Therefore, when the folded edge portion is picked, the packaged object can be prevented from being crushed in the folded edge portion.

  Moreover, the packaging bag which concerns on the said invention WHEREIN: It is preferable that the bottom face part is provided by the gusset in the other end side of the said front part, and the other end side of a back surface part.

  According to this packaging bag, since the bottom surface portion is provided by the gusset, the space portion can be enlarged as compared with the case where the bottom surface portion is not provided by the gusset and can be made independent. .

  Moreover, the manufacturing method of the packaging bag which concerns on this invention is a manufacturing method of the packaging bag which forms a packaging bag from the single-sided heat-sealable film original fabric, Comprising: The direction which does not have the heat-sealability of a film original fabric Apply the adhesive along the center line of one side of the film, fold the film original into two at the line where the adhesive is applied, and cut the strip-shaped film original in the length direction at the crease, thereby And one side portion of the front side raw fabric and one side portion of the rear side raw fabric are bonded by the adhesive, and the other of the front side raw fabric and the back side raw fabric Fold the front side raw fabric and the back side raw fabric so that the side portion side of the side covers the one side portion, and overlap and seal the other side portions of the front side raw fabric and the back side raw fabric. The width direction of the front side fabric and the back side fabric are spaced at regular intervals. It is characterized in that bag-making packaging bag by fusing.

  According to this method for producing a packaging bag, the packaging bag can be continuously produced from a single film original. Then, the front side raw fabric and the back side raw fabric formed by cutting the film raw fabric into two folds are overlapped with each other by an adhesive, and the other side portion is one side portion. Are folded so as to cover the front part and the back part, and the folded part of the front part and the back part of the part is bonded with the adhesive. The part which becomes a folding part is formed between each side part. Then, the front side raw fabric and the back side raw fabric that are overlapped are melted in the width direction at regular intervals, so that the front portion and the rear portion are formed, and the back side edges are sealed to be peelable from each other. A packaging bag having the folded portion is made.

  According to the present invention, the folded portions in a state of being folded toward the space portion from one end side of the front portion and the one end side of the back portion are provided, and the back side edges of both folded portions overlap and can be peeled off. By being sealed, it is possible to provide a packaging bag with excellent functionality that the seal is easy to peel off, and that it is difficult to break even when the internal pressure is high.

It is a partial cross section schematic perspective view which shows one Embodiment of the packaging bag which concerns on this invention. It is a principal part expansion schematic sectional front view which shows one Embodiment of the packaging bag which concerns on this invention. One embodiment of the manufacturing method of the packaging bag concerning the present invention is shown, and (a)-(d) is a schematic diagram explaining a manufacturing process in order. Embodiment different from FIG. 3 of the manufacturing method of the packaging bag which concerns on this invention is shown, (a)-(f) is the schematic which demonstrates a manufacturing process in order. It is a principal part expansion schematic sectional side view which shows the state which has opened the packaging bag which concerns on this invention. The conventional simple openable bag body is shown, (a) is a model perspective view, (b) is a model expansion partial sectional view which shows the easy-opening part of (a).

  An embodiment of a packaging bag according to the present invention will be described with reference to FIGS. 1 and 2. This packaging bag is made from one or a plurality of soft packaging materials, but the front part 1 and the back part 2 are overlapped, and an article to be packaged (not shown) is placed between the front part 1 and the back part 2. A space portion S is provided for sealing.

  Moreover, the illustrated packaging bag is provided with a bottom surface portion 3 by a gusset, and has a larger internal volume and is independent than when the bottom surface portion 3 is not provided. Then, both side edges 1a and 2a of the front part 1 and the back part 2 are sealed in a strip shape (illustrated by halftone dots) so as not to peel off. However, although not shown, the packaging bag may be provided with a side surface portion by a gusset.

  In any case, the packaging bag according to the present invention includes the folded portions 4 and 5 that are folded toward the space portion S from one end side of the front portion 1 (upper side in the drawing) and one end side of the back portion 2. It is characterized in that the back side edge portions 4a and 5a of the two folding portions 4 and 5 are overlapped and sealed so as to be peelable (illustrated by halftone dots).

  And the folding edge part 6 which is a boundary of the front part 1 and the one folding part 4 and the folding edge part 7 which is a boundary between the back part 2 and the other folding part 5 are sealed in a strip shape (illustrated by halftone dots). When the user picks the folded edges 6 and 7 so that the folded edges 6 and 7 are reinforced and the article to be packaged does not enter the folded edges 6 and 7 It is made not to crush. In addition, the folding | returning edge parts 6 and 7 can be made hard to slip | slip by giving the seal | sticker which provided unevenness like a horizontal stripe pattern or a knurling.

  And the seal | sticker of back side edge part 4a, 5a of the two folding parts 4 and 5 is given to sawtooth shape thru | or a wave shape (henceforth only described as "sawtooth shape") as shown in FIG. A full width seal 8 for sealing and a plurality of point seals 9, 9,... For increasing the seal strength are used in combination.

  As shown in the figure, the full-width seal 8 has a constant width portion 8a along one end edge of the folding portions 4 and 5, and peaks and valleys on the side of the folding edge portions 6 and 7 that are the opening side from the constant width portion 8a. Is integrally sealed with a continuous portion 8b, but may be sealed in a zigzag shape with a narrow width (not shown).

  In any case, the full width seal 8 is easily peeled off from the top of the peak portion when the two folding portions 4 and 5 are pulled in the opposite directions. However, the full width seal 8 can reinforce the seal strength by being provided with a constant width portion 8a.

  Further, the plurality of point seals 9, 9,... Are linearly provided at regular intervals along a portion 8b in which a number of peaks and valleys of the full width seal 8 are continuous. At the time of opening, the point seal 9 is peeled off, and the full width seal 8 is easily peeled off from the top of the peak portion.

  Here, the manufacturing method of such a packaging bag is demonstrated. The packaging bag can be made from a single-sided heat-sealable film or a double-sided heat-sealable film.

  For example, as shown in FIG. 3, in the case of making a bag from a single-sided heat-sealable film original fabric 10, from the state wound in a roll shape, as shown in FIG. 3 (a), there is no heat-sealability, The film 10 is fed in a horizontal position with the front surface 10a on which the package printing P or the like is applied facing downward and the back surface 10b having heat sealability facing upward (in FIG. 3, the original film 10 is transferred from the back surface side to the front surface side of the paper surface, or It shows a state of being fed from the front side to the back side.)

  And as shown in FIG.3 (b), the both sides 10c and 10c of the film original fabric 10 are turned inward so that back surface 10a, 10a may overlap, and the part 14 used as a folding part in this folded part , 15 are provided, and a portion 11 serving as a front surface portion, a portion 13 serving as a bottom surface portion, and a portion 12 serving as a back surface portion continue from a portion 14 serving as one folding portion toward a portion 15 serving as the other folding portion. Provided. And the adhesive agent A which can be peeled is coated on the side part of the part 14 which becomes one folding part or the side part of the part 15 which becomes the other folding part (not shown) (part coating).

  And as shown in FIG.3 (c), the film original fabric 10 is folded in half by a centerline, and the surfaces of the parts 14 and 15 used as a folding part are overlapped. Then, the adhesive A is applied to the side portion of the portion 14 that becomes the one folded portion, so that the back side edge portions of the portions 14 and 15 that become the folded portion are bonded to each other.

  Moreover, the back surface of the part 14 used as one folding part and the back surface of the part 11 used as a front part overlap, and the back surface of the part 15 used as the other folding part and the back surface of the part 12 used as a back part overlap. And in the boundary of the part 16 used as the folding | returning edge part which is a boundary of the part 14 used as one folding part, and the part 11 used as a front part, and the part 15 used as the other folding part, and the part 12 used as a back part A portion 17 serving as a folded edge is heat-sealed by heating in the length direction (from the front surface to the back surface) so that heating means having a certain width is sandwiched from both the upper and lower surfaces (indicated by reference numeral B). The back surfaces of the portions 16 and 17 to be turned-back edges are sealed.

  In addition, when it has the heat seal property which exhibits adhesive force when the adhesive agent A is heated, the part which becomes a front part which pinches | interposes the back side edge part of the parts 14 and 15 used as a folding part 11 and the part 12 used as a back part must be pinched | interposed by a heating means from the upper and lower sides. Therefore, between the portion 14 serving as one folding portion and the portion 11 serving as the front portion, between the portion 15 serving as the other folding portion and the portion 12 serving as the back portion, respectively, for example, an insulating sheet is interposed, The back surfaces of these 14, 11; 15, 12 are not adhered to each other.

  And as shown in FIG.3 (d), the part of the fold of the film original fabric 10 folded in half is folded inward, and the part 13 used as a bottom face part is formed with a gusset. Although not shown, the boundary portion between the bottom portion 13 and the front portion 11 and the boundary portion between the bottom portion 13 and the rear portion 12 are sealed in a band shape so as to form a so-called waist. You may make it have.

  When the original film 10 is melted at a certain interval in the width direction (left-right direction in FIG. 3), the folded portion is provided with a front face 1, a back face 2, and a bottom face 3 having a gusset, and is peelably sealed. A packaging bag having parts 4 and 5 is produced. The film original fabric 10 has a heat sealing property, and the back surfaces 10b and 10b are overlapped with each other, so that a fusing blade (not shown) sandwiches the film original fabric 10 from above and below, so that the front portion 1 and the back surface The side edges 1a, 2a of the part 2 are sealed in a strip shape so as not to peel off.

  Moreover, a packaging bag can also be manufactured by a method as shown in FIG. Also in this method, a bag is made from an original film 20 having a single-sided heat-sealing property, and as shown in FIG. 4 (a), there is no heat-sealing property, and the surface 20a on which package printing P or the like is applied faces upward. (See FIG. 4 shows a state in which the original film 20 is fed from the back side to the front side of the paper or from the front side to the back side.) .

  Then, it is coated on the surface 20a of the unrolled film 20 along the center line, that is, the adhesive A that can be peeled off at a position eccentric from the center line in the length direction (from the front surface to the back surface). (Part coat)

  And as shown in FIG.4 (b), while the film original fabric 20 is folded in half with the line coated with the adhesive agent A, it cut | disconnects and the front side original fabric 21 and the back side original fabric 22 are formed. . One side portion 21 c of the front side raw fabric 21 and one side portion 22 c of the back side raw fabric 22 are bonded by an adhesive A.

  In addition, when the adhesive A has a heat-sealing property that exerts an adhesive force when heated, the film original fabric 20 is cut, and the front-side original fabric 21 and the back-side original fabric overlap each other. By heating both side portions 21c and 22c of 22 from both sides, both side portions 21c and 22c can be bonded.

  Further, since the original film 20 is folded and cut at a position eccentric from the center line, the other side portion 22d of the back side original fabric 22 protrudes from the other side portion 21d of the front side original fabric 21. It is in a state.

  Then, as shown in FIG. 4C, in order to provide the portions 24 and 25 to be the folding portions, the front side raw fabric 21 and the back side raw fabric 22 are folded back, and one side portion 21c bonded by the adhesive A , 22c is covered. At this time, the other side portion 22 d of the back side original fabric 22 protrudes from the other side portion 21 d of the front side original fabric 21.

  And as shown in FIG.4 (d), the part 26 used as the folding | returning edge part which is the boundary of the part 24 used as one folding part and the part 21 used as a front part, the part 25 used as the other folding part, and a back surface The portion that becomes the folded edge portion 27 that is the boundary with the portion 22 that becomes the portion is sealed in a band shape (indicated by reference numeral B).

  The portions 26 and 27 serving as the folded edges are formed by overlapping the back surfaces 26b and 27b having heat sealing properties, so that, for example, a roller-shaped heating means is provided on one side 21d of the front side raw fabric 21. By sandwiching one side portion 22d of the back side raw fabric 22 from above and below, the portions 26 and 27 that become the folded edge portions can be sealed in the length direction.

  Moreover, although the part 24 used as one folding part and the part 25 used as the other folding part are also overlapped, since these 24 and 25 are surfaces 24a and 25a which do not have heat-sealing property overlap, The parts 24 and 25 are not heat sealed.

  Then, as shown in FIG. 4E, a portion protruding from the front side raw fabric 21 so that the other side portion 22 d side of the back side raw fabric 22 overlaps the other side portion 21 d of the front side raw fabric 21. The back side raw fabric 22 is folded and a portion 23 which becomes a bottom surface portion is formed by a gusset.

  Then, as shown in FIG. 4F, the other side portion 21d of the front-side original fabric 21 and the other side portion 22d of the rear-side original fabric 22 are heat-sealed. The two side portions 21d and 22d have heat-sealing back surfaces that overlap each other, so that, for example, a roller-shaped heating means is provided on one side portion 21d of the front-side original fabric 21 and the rear-side original fabric 22. , 22d from above and below, the other side portion 21d of the front side raw fabric 21 and the other side portion 22d of the back side raw fabric 22 can be sealed in a band shape.

  Moreover, the back side original fabric 22 is heat-sealed because the back portions of the outer side portion folded on the side that does not overlap the front side original fabric 21 also overlap each other. However, the overlapping portion can be prevented from being heat sealed by interposing a heat insulating sheet. Moreover, since the surfaces with which the back side original fabric 22 overlaps do not have heat sealing property, they are not heat sealed.

  And when this front side raw fabric 21 and the back side raw fabric 22 are melted at a certain interval in the width direction (left and right direction in FIG. 4), a front portion 1, a rear portion 2, and a bottom portion having a gusset are provided. A packaging bag having the folded portions 4 and 5 sealed in a peelable manner is produced. The front side original fabric 21 and the rear side original fabric 22 have heat-sealing back surfaces that are overlapped with each other, so that a fusing blade (not shown) causes the front side original fabric 21 and the rear side original fabric 22 to move. By sandwiching from above and below, both side edges 1a and 2a of the front part 1 and the back part 2 are sealed in a strip shape so as not to peel off.

  Moreover, although a packaging bag is not shown in figure, it can also be bag-made by the process as shown in FIG. 3, FIG. In this case, the part coat agent which weakens the adhesive strength of a heat seal is apply | coated to the edge part of the side part of the part by which a film original fabric is folded | folded and becomes a folding part.

  In any case, as shown in FIG. 1, the packaged bag is folded into the space portion S from one end side (upper side) of the front surface portion 1 and the back surface portion 2 where the space portion S is provided. 4 and 5 are provided, and the back edge portions 4a and 5a of the folding portions 4 and 5 are detachably sealed so that the packaged object can be packaged in the space S in a sealed state. .

  Moreover, this packaging bag can become independent by providing the bottom face part 3. In particular, when the boundary portion between the front surface portion 1 and the bottom surface portion 3 and the boundary portion between the back surface portion 2 and the bottom surface portion 3 are sealed, the boundary portion has a so-called waist and becomes independent in a stable posture.

  In this packaging bag, since the sealed folding parts 4 and 5 face the space part S, air does not enter between the folding parts 4 and 5 and the folding parts 4 and 5. Even if an internal pressure is generated inside, the seals of the back edge portions 4a and 5a of the folding portions 4 and 5 are not peeled off.

  And in order to open this packaging bag, as shown in FIG. 5, each folded-back edge part 6 and 7 is picked and it pulls in the opposite direction. At this time, even if the article to be wrapped enters between the front part 1 and the folding part 4 and between the back part 2 and the folding part 5, it does not enter the folding edge parts 6, 7, so the folding edge part 6 , 7 will not crush the package.

  Then, when the folded edge portions 6 and 7 are pulled in the opposite direction, the seals of the folded portions 4 and 5 are peeled off and can be opened. When the point seals 9, 9,... Are applied, the full width seal 8 is peeled after the point seals 9, 9,. The full width seal 8 is easily peeled off from the top of the peak portion of the portion 8b in which a large number of peaks and valleys are continuous.

  In addition, this invention can be variously changed without limiting to the said embodiment. For example, in the packaging bag, the other end sides of the front surface portion 1 and the back surface portion 2 can be overlapped with each other so that the gusset is not provided on the bottom surface side.

  Further, the back edge portions 4a and 5a of the folding portions 4 and 5 can be fixed to each other without using a saw-tooth or wave-shaped seal and a plurality of point seals in combination, or a saw-tooth or wave-shaped seal. It is good only as well.

DESCRIPTION OF SYMBOLS 1 ......... Front part 2 ......... Back part 3 ......... Bottom part 4 ......... Folding part 4a ... Back side edge part 5 ......... Folding part 5a ...... Back side edge part 6 ......... Folding edge Part 7 ............ Folding edge part 8 ............ Full width seal 9 ............ Point seal 20 ...... Film original fabric 21 ...... Front side raw fabric 21 c ...... One side portion 21 d ...... Other side portion 22 ...... Back side Original fabric 22c ... One side 22d ... The other side S ... Space

Claims (5)

A packaging bag in which a front part made of a soft packaging material and a back part made of a soft packaging material are overlapped, and a space part for storing an article to be packaged is provided between the front part and the back part,
Folded portions in a state of being folded toward the space portion from one end side of the front surface portion and one end side of the back surface portion are provided, and the back edge portions of both folded portions are overlapped and sealed so as to be peelable. A packaging bag characterized by that.   2. The packaging bag according to claim 1, wherein the two folded portions that overlap each other are sealed in a sawtooth shape or a wave shape at the back edge portions, and a plurality of point seals are provided on the opening side. .   The folding edge part which is a boundary part of the said front part and the said folding part, and the folding edge part which is a boundary part of the said back part and the said folding edge part are each sealed in strip | belt shape. Or the packaging bag of 2.   The packaging bag according to any one of claims 1 to 3, wherein a bottom surface portion is provided by a gusset on the other end side of the front surface portion and the other end side of the back surface portion. A manufacturing method of a packaging bag for making a packaging bag from a single-sided heat-sealing film raw material,
Apply an adhesive along the center line of one side of the film that does not have heat-sealability, fold the film into two at the line where the adhesive is applied, and use the folds as a belt-like film Are cut in the length direction to form a front side original fabric and a back side original fabric, and one side portion of the front side original fabric and one side portion of the rear side original fabric are bonded by the adhesive. The front side original fabric and the back side original fabric are folded back so that each other side of the front side original fabric and the rear side original fabric covers the one side, and the other of the front side original fabric and the rear side original fabric The packaging bag is made by stacking and sealing the side portions of each of the sheets, and fusing the overlapping front-side original fabric and back-side original fabric in the width direction at regular intervals. Manufacturing method.

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