JP2007119076A - Packaging bag - Google Patents

Abstract

A packaging bag capable of being stacked is provided.
A sleeve 60 that is folded into a predetermined three-dimensional shape by a fold line is provided inside a packaging bag main body 54, and the packaging bag main body 54 is folded in accordance with the three-dimensional shape defined by the sleeve 60, and It is configured to be held in a predetermined three-dimensional shape.
[Selection] Figure 11

Description

  The present invention relates to a packaging bag that enables a three-dimensional shape to be maintained by a sleeve provided in the packaging bag body.

  As shown in FIG. 25, the reclosable packaging bag 1 generally used is composed of two plastic film wrapping materials 2 and 3 and heat-sealed on both sides and the lower end portion, thereby forming a heat-sealing portion 4. The packaging bag body 7 is formed with an upper opening 5 and 6 and a linear fastener 9 coupled to the inner surface of the opening 8 of the packaging bag body 7. And the opening end of the reclosable packaging bag 1 is closed by heat-sealing after storing the contents. The linear fastener 9 is formed of a fastener piece provided with a male engagement portion and a fastener piece provided with a female engagement portion.

  When making the reclosable packaging bag, when attaching the linear fastener 9 to the packaging bag body 7, the linear fastener 9 was cut to a length corresponding to the width of the plastic film wrapping material 2, 3 and cut. One fastener piece of the linear fastener 9 is disposed on one inner surface of the packaging material 2 via an adhesive, and the other fastener piece of the cut linear fastener 9 is disposed on one end inner surface of the packaging material 3 via an adhesive. Placed in. The linear fastener 9 is coupled to the inner surface of the packaging bag body 7 when the packaging materials 2 and 3 are heat sealed to form the packaging bag body 7.

  In the reclosable packaging bag, the linear fastener is continuously provided from the outer end of the one side heat seal portion of the packaging bag body to the outer end of the other side heat seal portion. Is the thickness of the two wrapping materials plus the thickness of the linear fastener. When heat-sealing both sides of the packaging bag body, the pressure and heat to crush the extra amount by the thickness of the linear fastener It becomes necessary, and the problem at the time of heat seal processing becomes long.

  In the reclosable packaging bag, the step of cutting the linear fastener into a length 6 that matches the width of the plastic film packaging material, and the step of bonding the cut linear fastener to the inner surface of the plastic film packaging material Two steps are required, and improvement in work efficiency is limited.

  In addition, since the reclosable packaging bag itself usually does not have rigidity, it is impossible to stack the reclosable packaging bag containing the contents as a product.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a packaging bag capable of shortening the processing time and improving the working efficiency.

  Another object of the present invention is to provide a packaging bag that maintains a three-dimensional shape and can be stacked.

  In order to solve the above problems, in the present invention, a sleeve that is folded into a predetermined three-dimensional shape by a fold line is provided inside the packaging bag body, and the packaging bag body is folded in accordance with the three-dimensional shape defined by the sleeve. Therefore, a packaging bag held in the predetermined three-dimensional shape was adopted.

  If a sleeve for holding this in a predetermined shape is disposed in the packaging bag body, the packaging bag body can be easily three-dimensionalized and appropriate strength is imparted to the three-dimensional packaging bag body. And can sufficiently withstand the load on the stack.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example in which the reclosable packaging bag according to the present invention is applied to a self-supporting reclosable packaging bag. This self-supporting reclosable packaging bag 10 has two film wrapping materials 11, 12 forming both sides. And a packaging bag body 14 formed by the film wrapping material 13 forming the bottom, and a linear fastener 15 coupled to the inner surface of the opening end of the packaging bag body 14.

  The packaging bag body 14 folds the bottom film wrapping material 13 in two and arranges the folded film wrapping material 13 between the double-sided film wrapping materials 11 and 12 with the folded portion 13a first. 11 and 12 are heat-sealed to form side heat-seal portions 16 and 16, and the lower end portions of the film packaging materials 11 and 12 are heat-sealed to form a lower-end heat seal portion 17. .

  The film wrapping materials 11, 12, and 13 are made of the same plastic film material, and include, for example, a polyester film having a thickness of 12 microns, an aluminum foil having a thickness of 9 microns, and a polyethylene film having a thickness of 50 microns. It is a laminate film composed of a laminate film, a polyester film having a thickness of 12 microns, and a polyethylene film having a thickness of 50 microns.

  As shown in FIG. 2, the linear fastener 15 includes a female fastener portion 18 and a male fastener portion 19. As shown in FIG. 1, the linear fastener 15 is formed along the opening of the packaging bag body 14, and the length of the linear fastener 15 varies from the width of the packaging bag body 14 to the side heat seal portion 16. , 16 excluding the total width.

  The female fastener portion 18 and the male fastener portion 19 of the linear fastener 15 accommodate the square contents or the rectangular contents in the self-supporting reclosable packaging bag 10 to make the self-supporting reclosable packaging bag 10 into a square content. In order to make it easy to form a square package or a rectangular package along the object or the rectangular contents, it is preferable to form a notch in the part to be folded or to form an easily bendable part. Further, it is preferable to form thin portions at both end portions of the female fastener portion 18 and the male fastener portion 19 of the linear fastener 15.

  FIG. 2 is a view showing an example in which the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are coupled to the packaging bag body 14 in the molding stage of the packaging bag body 14. The female fastener portion 18 and the male fastener portion 19 are respectively coupled to the folded upper end portions 11a and 12a of the upper end portion of the packaging bag body 14 where the film wrapping materials 11 and 12 are not joined.

  That is, the unbonded portions 11a and 12a of the film wrapping materials 11 and 12 are bent 90 degrees in directions away from each other, and the bent upper end portions 11a and 12a are set on the linear fastener forming dies 20 and 21 shown in FIG. By injecting synthetic resin such as polyethylene resin into the molding space in a molten state from the gate port 22 of the mold 21 through the runner 23 by insert injection molding means, the upper end where the female fastener 18 and the male fastener 19 are bent. It couple | bonds with the inner surface of the parts 11a and 12a. In this case, the female fastener portion 18 and the male fastener portion 19 are formed with a width narrower than the entire width of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16 to be heat sealed in a subsequent process.

  FIG. 4 shows an example in which the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are coupled to the film packaging material 30 before the packaging bag body 14 is molded.

  That is, as shown in FIG. 4, the female fastener portion 18 and the male fastener portion 19 are made of polyethylene resin by roll injection film forming material 30 set in linear fastener forming dies 31, 32 by insert injection molding means. Such a synthetic resin is injected into the molding space from the gate port 33 of the mold 32 through the runner 34 in a molten state, and is bonded to one surface of the film packaging material 30 at a predetermined interval. In this case, the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are not the full width L of the packaging bag body 14 to be molded, but are side heat seal portions that are heat sealed in a subsequent process. The total width of 16, 16 is formed to be narrower than the total width L of the packaging bag body 14.

  Next, a method for manufacturing the self-supporting reclosable packaging bag 10 will be described.

  First, three film wrapping materials are prepared: film wrapping materials 11 and 12 that form both surfaces of the wrapping bag body 14 and a film wrapping material 13 that forms the bottom.

  Next, the film wrapping material 13 that forms the bottom is folded in two, and the folded film wrapping material 13 is placed below the film wrapping materials 11 and 12 with the folded portion 13a facing upward, The lower end portions of the materials 11 and 12 are heat sealed together with the film wrapping material 13 to form the lower end heat seal portion 17.

  Next, the upper end portions 11a and 12a of the film wrapping materials 11 and 12 of the packaging bag body 14 in which the lower end heat seal portion 17 is formed are bent by 90 degrees in directions away from each other. The bent upper end portions 11a, 12a are set in linear fastener forming dies 20, 21, as shown in FIG.

  Synthetic resin such as polyethylene resin or polypropylene resin is formed on the folded upper end portions 11a and 12a set on the linear fastener molds 20 and 21 through a runner 23 from the gate port 22 of the mold 21 by insert injection molding means. In a molten state. The synthetic resin injected in the molding space in a molten state is cooled in the molding space, and the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are connected to the inner surfaces of the upper end portions 11a and 12a of the packaging bag body 14. Are respectively molded and bonded. The lengths of the female fastener portion 18 and the male fastener portion 19 are set to be narrower than the total width of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16.

  The folded upper end portions 11a and 12a of the packaging bag body 14 formed with the female fastener portion 18 and the male fastener portion 19 are joined so that the female fastener portion 18 and the male fastener portion 19 are engaged, and the joined film The packaging materials 11 and 12 form the side heat seal parts 16 and 16 by heat-sealing both sides. Thereby, the self-supporting reclosable packaging bag 10 is formed.

  Next, a method for manufacturing a three-side sealed reclosable packaging bag will be described.

  First, a roll-shaped film wrapping material 30 is prepared, and the film wrapping material 30 fed out from the roll-shaped film wrapping material 30 is set in linear fastener forming dies 31, 32 shown in FIG.

  Next, a synthetic resin such as polyethylene resin is injected in a molten state into the molding space through the runner 34 from the gate port 33 of the molding die 32 by insert injection molding means, and the female fastener portion 18 and the male fastener portion 19 are filmed. Each of the packaging materials 30 is molded at a predetermined interval. The length of each of the female fastener part 18 and the male fastener part 19 is narrower than the total width L of the packaging bag body 14 by the total width of the side heat seal parts 16 and 16.

  The film wrapping material 30 to which the female fastener portion 18 and the male fastener portion 19 are fixed is cut at an interval C corresponding to the width L of the packaging bag body 14 to be molded, as shown in FIG. As shown in FIG. 6, the cut film wrapping material 30 has a female fastener portion 18 and a male fastener portion 19 on the end side. The cut film packaging material 30 is folded in half at an intermediate position so that the female fastener portion 18 and the male fastener portion 19 are engaged with each other.

  The two-folded film wrapping material 30 is heat-sealed on both sides to form the side heat-sealed portions 16 and 16. Thereby, a three-side seal type reclosable packaging bag is formed.

  Finally, a method for manufacturing a four-side sealed reclosable packaging bag will be described.

  First, two film wrapping materials 11 and 12 that form both sides of the reclosable packaging bag are prepared, the film wrapping materials 11 and 12 are overlapped, and the lower ends of the film wrapping materials 11 and 12 are heat sealed. A lower end heat seal portion 17 is formed.

  Next, the packaging bag main body 14 in which the lower end heat seal portion 17 is formed is bent 90 degrees in the direction of separating the upper end portions 11a and 12a that are not coupled to each other. The folded upper end portions 11a and 12a of the packaging bag body 14 are set in linear fastener forming dies 20 and 21 shown in FIG.

  A synthetic resin such as polyethylene resin is melted into the molding space from the gate port 22 of the molding die 21 through the runner 23 to the upper end portions 11a, 12a set on the linear fastener molding dies 20, 21 by insert injection molding means. Injected. Thereby, the female fastener part 18 and the male fastener part 19 are each shape | molded by the inner surface of the bent upper end parts 11a and 12a of the packaging bag main body 14. FIG. The lengths of the female fastener portion 18 and the male fastener portion 19 are set narrower than the total width of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16.

  Next, the bent upper end portions 11a and 12a are joined to each other so that the female fastener portion 18 and the male fastener portion 19 coupled to the inner surface are engaged with each other, and both side portions are heat sealed to be side heat sealed. A reclosable packaging bag is formed by forming the portions 16 and 16.

  FIG. 10 shows a package in which a reclosable packaging bag is filled with rectangular contents.

  The packaging body 40 includes a plurality of rectangular contents (not shown) such as biscuits and crackers accommodated in a three-side seal type reclosable packaging bag 41 and a three-side seal type reclosable packaging bag 41. Z)).

  By storing the rectangular contents in the three-side seal-type reclosable packaging bag 41, the three-side seal-type reclosable packaging bag 41 corresponds to the rectangular contents on both sides and both sides as shown in FIG. The flat part is formed in the part including the side heat seal part, and the double-sided part swells accordingly. As a result, the three-side seal-type reclosable packaging bag 41 has a form in which the upper end portion 42 including the linear fastener 15 that does not accommodate the rectangular contents protrudes in the width direction from both side portions.

  In order to form the rectangular package 40 shown in FIG. 10, as shown in FIG. 8, the upper end portion 42 of the three-side seal type reclosable packaging bag 41 is bent along the upper surface of the rectangular contents. Since the bent portion 42 has a shape protruding from both side portions, the protruding portion 43 is bent downward along the side surface of the rectangular content as shown in FIG. In this case, it is desirable to form a bendable part such as a notch in a part corresponding to the fold line of the protruding part 43 of the linear fastener 15 so that the protruding part 43 can be easily bent.

  Next, the reclosable packaging bag which concerns on other embodiment of this invention is explained in full detail below, referring FIG.11 and FIG.12.

  The reclosable packaging bag 50 includes a packaging bag main body 54, a linear fastener 55, and a sleeve 60.

  The packaging bag main body 54 is formed by folding one film packaging material in two so that the folding line is positioned below, and heat-sealing both sides thereof. That is, the packaging bag main body 54 has an opening on the upper side and heat seal portions 56 and 56 on both sides.

  The linear fastener 55 is provided along the opening of the packaging bag main body 54 as in the embodiment shown in FIG. That is, in the vicinity of the opening of the packaging bag main body 54, the male fastener portion for the linear fastener 54 is provided on the inner surface of one of the mutually opposing portions 51 and 52 of the film wrapping material forming the packaging bag main body 54. And a female fastener portion for the linear fastener 54 is formed on the inner surface of the other. The male and female fastener portions constituting the linear fastener 55 are provided in the film packaging portion excluding the heat seal portions 56 and 56.

  The sleeve 60 is made of a foldable material such as paper or synthetic resin, and is provided so as to connect a pair of opposing front and back surface portions 60a and 60b and both side edges thereof to each other. It is comprised from a pair of side part 60c, 60d which has protrusion 60cx, 60dx, respectively. The front and back surface portions 50a and 50b have the same rectangular shape. On the other hand, the side surface portions 60c and 60d have the same pentagonal shape, that is, a shape obtained by combining a rectangular shape and an isosceles triangular shape located at the lower end thereof. As shown in FIG. 12A, the side surface portions 60c and 60d each have a fold line FL extending in the length direction at the center portion in the width direction. Accordingly, as shown in FIG. 12A, the sleeve 60 has a three-dimensional structure, while the folding line FL of the side surface portions 60c and 60d is moved outward, and is folded along the figure. 12 (b), it can be folded flat.

  The sleeve 60 is inserted in the folded state as shown in FIG. 12B so that the tips of the protrusions 60cx and 60dx are in contact with the bottom of the packaging bag body 54.

  The sleeve 60 inserted into the packaging bag main body 54 is three-dimensionally deformed as shown in FIG. 12A, so that the packaging bag main body 54 has the shape shown in FIG. The packaging bag body 74 used in f) is maintained in a single side heat seal portion 76, which is different from the packaging bag body 54 shown in FIG. From such a state, the protrusions 60cx and 60dx of the sleeve 60 are bent inward together with the packaging bag body 54, whereby the self-supporting shape shown in FIG. 7 is maintained. Further, the upper portion of the packaging bag body 54 is shown in FIGS. 9 and FIG. 10, the reclosable packaging bag 50 can be transformed into a cuboid shape that can be stacked.

  As described above, when the upper portion of the packaging bag body 54 is folded, the linear fastener 55 is also folded according to the rectangular parallelepiped shape provided by the sleeve 60. In order to facilitate such folding, the linear fastener 55 has folding easy portions 58a and 59a as shown in FIG.

  The linear fastener 55 has a female fastener portion 58 and a male fastener portion 59 as in the embodiment shown in FIG. 2, but the bendable portions 58 a and 59 a are bent portions, that is, a sleeve 60. In the position corresponding to the upper ends of the side portions 60c and 60d, the female fastener portion 58 and the flat portion obtained by partially removing the male fastener portion 59 are formed. Accordingly, in the folding easy portions 58a and 59a, there is no female receiving portion and male engaging portion as in other portions, and only a flat plate portion is present. In addition, the folded portion does not unnaturally protrude outward, and the cuboid shape in which the reclosable packaging bag 50 can be stacked can be maintained beautifully.

  The above-described foldable portions 58a and 59a are not limited to the above-described forms. For example, holes are formed by punching or the like in corresponding bent portions of the female fastener portion 58 and the male fastener portion 59. The part may be easily bent.

  The above-described easy-to-bend portions 58a and 59a may be provided only in the bent portion of the linear fastener 55, and the sealing characteristics of the linear fastener 55 are not significantly deteriorated. However, when the reclosable packaging bag 50 is required to have excellent sealing characteristics, the above-described folding easy portions 58a and 59a are provided with sealing assisting means 58b, 58b, 59b and 59b as shown in FIG. Is desirable.

  The sealing assisting means includes a pair of ribs 58b and 58b having a triangular cross section integrally formed so as to protrude toward the male fastener portion 59 side at the flat portion 58a on the female fastener portion 58 side, The flat portion 59a on the mold fastener portion 59 side includes a pair of triangular ribs 59b and 59b that are integrally formed so as to protrude toward the female fastener portion 58 side. In a sealed state of the linear fastener 55, that is, in a state where the male fastener portion 59 is engaged with the female fastener portion 58, the distal ends of the ribs 58 b and 58 b on the female fastener portion 58 side are male fastener portions. The seal between the flat portions 58a and 59a is improved by contacting the tip portions of the 59-side ribs 59b and 59b.

  The protruding heights of the ribs 58b, 58b and 59b, 59b described above are about half the depth of the female receiving portion in the female fastener portion 58 and the height of the male engaging portion in the male fastener 59, respectively. However, these ribs 58b, 58b, 59b, 59b do not hinder the easy folding characteristics of the easy folding parts 58a, 59a.

  In FIG. 14, the ribs 58b, 58b and 59b, 59b are respectively arranged on the outside with a gap from both sides of the female receiving part in the female fastener part 58 and the male engaging part in the male fastener 59. However, if these ribs 58b, 58b and 59b, 59b are provided in the vicinity of the female receiving portion and the male engaging portion, a better sealing performance is secured.

  The above-described sealing auxiliary means is not limited to the above-described form. For example, as shown in FIG. 15, the sealing auxiliary means is placed on the male fastener portion 59 side in the flat portion 58a on the female fastener portion 58 side. A pair of ribs 58c, 58c having a trapezoidal cross section formed integrally so as to protrude toward the upper side and a flat portion 59a on the male fastener portion 59 side so as to protrude toward the female fastener portion 58 side. You may comprise from a pair of rib 59c, 59c of the cross-sectional trapezoid shape formed integrally. In this case, in the sealed state of the linear fastener 55, that is, in the state where the male fastener portion 59 is engaged with the female fastener portion 58, the upper end surface portions of the ribs 58c and 58c on the female fastener portion 58 side are male. The seal between the flat portions 58a and 59b is improved by contacting the lower end surfaces of the ribs 59c and 59c on the mold fastener portion 59 side.

  Next, a method for manufacturing the reclosable packaging bag according to another embodiment of the present invention described above will be described in detail below.

  The manufacturing method of the present invention includes a packaging bag unjoined main body preparation step, a position adjustment folding step, a cutting and folding step, a linear fastener forming step, a heat sealing step, and a sleeve insertion step.

  In the packaging bag unbonded main body preparation step, the opposing ends of the single film wrapping material 70f are overlapped with each other, and heat-sealed over the entire length direction of the overlapped portion. It is formed by forming an unjoined main body for a packaging bag having upper and lower ends opened (see FIG. 16A).

  The position adjustment folding step is performed by turning the unbonded main body for the packaging bag in the circumferential direction so that the inner edge of the heat seal portion 76 is separated from the one side end by a predetermined distance d, and folding the unsealed main body flatly. (See FIG. 16 (b)). This distance d is substantially equal to the length half of the width of the side surface portion 60d of the sleeve 60 used in the sleeve insertion step, that is, the length L shown in FIG.

  In the cutting and folding process, after the above-described position adjustment folding process, cuts CL are respectively formed at the upper ends of both sides of the unbonded main body for packaging bag, and then the unbonded main body for packaging bag corresponding to the length of the notch CL is formed. This is done by bending the upper end portions away from each other to form a pair of bent portions (see FIG. 16C).

  In the linear fastener forming step, the pair of bent portions are set in a linear fastener forming die, and the linear fastener portions for the linear fastener are formed on the inner surfaces of the pair of bent portions, and both end portions are inserted by insert injection molding means. Except for this, it is carried out by molding each continuously. Since this linear fastener forming step is the same as the linear fastener forming step in the embodiment shown in FIG. 2, the description thereof is omitted.

  In the heat sealing step, the lower end of the unbonded main body for the packaging bag is heat-sealed over the entire length thereof to form the lower end heat seal portion 77 and the unbonded main body for the packaging bag corresponding to the above-described cut CL. This is performed by heat-sealing only the upper ends of the both side ends (see FIG. 16D). In this way, the packaging bag body 74 is formed.

  The sleeve insertion step is performed by inserting the sleeve 60 into the packaging bag body 74 formed as described above (see FIG. 16E). Since the sleeve 60 is the same as the sleeve described in the embodiment shown in FIGS. 11 and 12, the description thereof is omitted.

  The sleeve 60 inserted into the packaging bag main body 74 is three-dimensionally deformed as shown in FIG. 12A, so that the packaging bag main body 74 is maintained in the shape shown in FIG. From such a state, the protrusions 60cx and 60dx of the sleeve 60 are bent inward together with the packaging bag body 74, whereby the self-supporting shape shown in FIG. 7 is maintained. Further, the upper part of the packaging bag body 74 is shown in FIGS. 9 and FIG. 10, the reclosable packaging bag 70 can be deformed into a cuboid shape that can be stacked.

  According to the reclosable packaging bag 70 formed as described above, in the position adjustment folding process, the inner edge of the heat seal portion 76 is at a predetermined distance d from one side end, that is, in FIG. Since the unbonded main body for the packaging bag is rotated in the circumferential direction so as to be separated by the indicated length L, the heat seal portion 76 is brought close to the edge portion on the side surface of the rectangular parallelepiped reclosable packaging bag 70. The heat seal part 76 is not conspicuous, and the appearance of the reclosable packaging bag 70 can be maintained beautifully.

  When the request | requirement regarding an external appearance improvement is not severe, you may abbreviate | omit the process of turning the unjoined main body for packaging bags in the circumferential direction in the manufacturing method mentioned above. When this step is omitted, the heat seal portion is located at the center of the side surface of the rectangular parallelepiped reclosable packaging bag.

  Next, another method for manufacturing a reclosable packaging bag according to another embodiment of the present invention will be described in detail below.

  Another manufacturing method of the present invention includes a film packaging material folding step, a sleeve arranging step, a cutting and folding step, a linear fastener forming step, and a heat sealing step.

  The film wrapping material folding step is performed by folding a single film wrapping material 80f in half and preparing an unbonded main body for a packaging bag in which the upper and lower ends and one side end are not bonded to each other.

  The sleeve placement step is performed by placing the sleeve 60 in the unbonded main body for the packaging bag (see FIG. 17A). The sleeve 60 may be temporarily fixed to the unbonded main body for the packaging bag by an adhesive means such as hot melt. Since the sleeve 60 is the same as the sleeve described in the embodiment shown in FIGS. 11 and 12, the description thereof is omitted.

  The incision and folding step forms a notch at the upper end at one end of the unbonded main body for packaging bag, and then bends the upper end portions of the unbonded main body for packaging bag corresponding to the length of the notch to each other in a direction away from each other, This is done by forming a pair of bent portions.

  In the linear fastener forming step, the pair of bent portions are set in a linear fastener forming die, and the linear fastener portions for the linear fastener are formed on the inner surfaces of the pair of bent portions, and both end portions are inserted by insert injection molding means. Except for this, it is carried out by molding each continuously. Since this linear fastener forming step is the same as the linear fastener forming step in the embodiment shown in FIG. 2, the description thereof is omitted.

  In the heat sealing step, the lower end of the unbonded main body for the packaging bag is heat sealed over the entire length direction thereof to form the lower end heat seal portion 87, and the other side end is heat sealed over the entire length direction thereof. Then, the side heat seal part 86 is formed, and further, only the upper end of one side end of the unbonded main body for packaging bag corresponding to the above-described incision is heat sealed (see FIG. 17B). ). In this way, the packaging bag body 84 is formed.

  The sleeve 60 inserted into the packaging bag main body 84 is three-dimensionally deformed as shown in FIG. 12A, whereby the packaging bag main body 84 is maintained in the shape shown in FIG. From such a state, the protrusions 60cx and 60dx of the sleeve 60 are folded inward together with the packaging bag body 84 to maintain the self-supporting shape shown in FIG. 7, and the upper portion of the packaging bag body 84 is further illustrated in FIGS. 9 and FIG. 10, the reclosable packaging bag 80 can be transformed into a cuboid shape that can be stacked.

  In the above-described method for manufacturing a reclosable packaging bag, if a co-extruded film having heat sealing properties on both sides is used as the film packaging material, a simple heat treatment is applied to the three-dimensional reclosable packaging bag. As a result, it is possible to prevent the heat seal portion from rising. Therefore, the appearance of the three-dimensional reclosable packaging bag can be maintained beautifully, and when displaying on the display shelf etc., the packaging bag row is disturbed due to the catch in the heat seal part with other packaging bags. And prevent falling.

  Moreover, in embodiment mentioned above, although the sleeve demonstrated as what has the shape shown in FIG. 12, it is not limited to this shape, If a packaging bag main body can be hold | maintained to a predetermined shape, The shape is arbitrary.

  The present invention also includes a reclosable packaging bag for solving the problem of improving stacking characteristics. This reclosable packaging bag is provided with a packaging bag body having an opening and a heat seal part, and a linear fastener provided in the opening of the packaging bag body, and is disposed in the packaging bag body. The packaging bag body is further provided with a sleeve, and is folded in accordance with a predetermined three-dimensional shape limited by the sleeve, and is held in a predetermined three-dimensional shape.

  Therefore, in the reclosable packaging bag of the present invention, it is not necessary to form the linear fastener using the insert injection molding means as in the above-described embodiment. For example, a separately formed linear fastener is packaged. It may be attached to the packaging bag body using any other fixing means such as bonding to a predetermined position of the bag body, heat welding at the same time during heat sealing. In this case, as in the above-described embodiment, it is desirable to provide thin portions at both end portions of the linear fastener, or to provide an easy-to-bend portion at the bent portion, but in particular, severe demands are imposed on the appearance. If not, the reclosable packaging bag need not necessarily have such features.

  In the above-described embodiment of the present invention, each of the protrusions 60cx, 60dx of the sleeve 60 is in contact with the bottom of the packaging bag body 54, 74, 84, so Has the effect of maintaining the position. If the packaging bag body has such an action, the sleeve protrusions 60cx and 60dx are not necessary. With respect to this type of reclosable packaging bag, another embodiment of the present invention is described below with reference to FIGS.

  The reclosable packaging bag 90 includes a packaging bag body 94, a linear fastener 95, and a sleeve 60M1.

  The opposing portions 91 and 92 and the heat seal portions 91 and 92 of the packaging bag body 94 of the reclosable packaging bag 90 shown in FIG. 18 are opposed to the packaging bag body 54 of the reclosable packaging bag 50 shown in FIG. Correspond to the portions 51 and 52 and the heat seal portions 56 and 56, respectively. Each of the heat seal portions 96, 96 includes a stopper portion 96a at the lower portion thereof. The stopper portions 96a and 96a face each other as shown in FIG. 18, and as a result, both side ends of the lower portion of the sleeve 60M1 are placed on the stopper portions 96a and 96a. Each of the stopper portions 96a and 96a is formed by increasing the width of the lower portion of the heat seal portion 96 as shown in FIG. The stopper portions 96a and 96a have an action of maintaining the sleeve 60M1 in a predetermined position in the packaging bag body 94 so that the lower portion of the packaging bag body 94 can be easily folded into a shape as shown in FIG. Yes. Therefore, unlike the sleeve 60 described above, the sleeve 60M1 does not have a protrusion.

  As shown in FIG. 18, the stopper portion 96 a is preferably formed on each of the heat seal portions 96 and 96. However, a single stopper portion may be formed on one of the heat seal portions 96 and 96. As shown in FIG. 19B, the stopper portion 96a can be formed by partially increasing the width of the lower portion of the heat seal portion 96 and providing a small protrusion 96b. The reclosable packaging bag 90 is three-dimensionalized into the shape shown in FIG. 8 by the same method as described above.

  FIG. 20 shows a modification 60M2 of the sleeve 60M1 shown in FIG. The deformed sleeve 60M2 has a pair of foldable reinforcing flaps 60cy and 60dy. That is, the sleeve 60M2 includes a pair of opposed front and back surface portions 60a and 60b and a pair of side surface portions 60c and 60d that connect both side edges thereof. The reinforcing flaps 60cy and 60dy are integrally formed at the upper ends of the side surface portions 60c and 60d of the sleeve so as to protrude upward. FIG. 20A shows the sleeve 60M2 folded in a flat state. The shape of the sleeve 60M2 folded in such a flat state is changed to a quadrangular shape by widening the side surface portions 60c and 60d. Reinforcing flaps 60cy and 60dy are preferably provided on the side surface portions 60c and 60d, respectively. However, it is also possible to provide a single reinforcing flap on one of the side portions 60c, 60d.

  FIG. 21 shows another modification 60M3 of the sleeve 60M2 shown in FIG. Sleeve 60M3 is identical to sleeve 60M2 except that it has a removable sleeve portion 60dy. Accordingly, the same components are denoted by the same reference numerals, and descriptions of these components are omitted. As shown in FIG. 20B, the sleeve portion 60dy can constitute a lid of the sleeve 60M2, and is formed by increasing the length of the reinforcing flap 60dy. The length of the sleeve portion 60dy is substantially the same as the width of the surface portion 60a. As shown in FIG. 21B, the sleeve portion 60dy can be opened and closed such that the sleeve portion 60dy is placed on the reinforcing flap 60cy. With such a structure, the strength of the expanded sleeve 60M3 can be further improved. The connecting portion between the sleeve portion 60dy and the side surface portion 60d is provided with a cut line so that the sleeve portion 60dy can be easily separated from the side surface portion 60d. Finger holes 60dya and 60dyb are formed in the sleeve portion 60dy to facilitate separation from the side surface portion 60d.

  Instead of the above-described removable sleeve portion 60dy, a lid formed separately from the sleeve and having an inverted U-shape so as to be inserted into the sleeve may be provided.

  In the embodiment of the method for manufacturing the reclosable packaging bag, the bottom of the reclosable packaging bag having a stackable rectangular parallelepiped shape is formed by folding the flap portions 70a and 70b as shown in FIG. It is formed. Here, if a co-extruded film or the like having heat sealing properties is used as a film wrapping material, it is possible to prevent the flap portions 70a and 70b from projecting downward by performing a simple heat treatment on the bottom of the reclosable packaging bag. .

  23 and 24 show a modification of the method for forming the bottom of the reclosable packaging bag 100. FIG. The forming method according to this modification includes a step of subjecting the flap portions 100a and 100b of the packaging bag main body 104 to a heat sealing process and a step of cutting the tip portions of these flap portions.

  That is, the flap portion 100a of the packaging bag body 104 is placed on the base 111, and the heat seal head 110 is pressed against the flap portion 100a to perform a heat seal process. The other flap portion 100b of the packaging bag main body 104 is also heat-sealed by the same method. In this way, heat-sealed flap portions 100a and 100b as shown in FIG. 23B are obtained. Next, the tips of the heat-sealed flap portions 100a and 100b are cut as shown in FIG. 24A to form small flap portions 100ax and 100bx. FIG. 24B is a schematic diagram showing the reclosable packaging bag 100 whose shape has changed to a cubic shape. In FIG. 24B, reference numerals “100x, 100y” indicate the upper flap portions of the reclosable packaging bag 100 that are maintained in the folded state. In such a reclosable packaging bag 100, as shown in FIG. 10, the process of folding a flap part is not required. Furthermore, the small flap portions 100ax, 100bx improve the self-standing characteristics of the bag 100. However, the small flap portions 100ax and 100bx may be folded inward as shown in FIG.

The top view which shows embodiment of the reclosable packaging bag by this invention. The figure which shows the linear fastener of the reclosable packaging bag of FIG. The figure which shows an example of the shaping | molding method of the linear fastener of FIG. The figure which shows the other example of the shaping | molding method of the linear fastener of FIG. The figure which shows the linear fastener shape | molded with the linear fastener shaping | molding method of FIG. The figure which shows other embodiment of the reclosable packaging bag by this invention. The figure which shows the 1st step of the packaging procedure of the reclosable packaging bag which accommodated the rectangular content by this invention. The figure which shows the 2nd step of the packaging procedure of the reclosable packaging bag which accommodated the rectangular content by this invention. The figure which shows the 3rd step of the packaging procedure of the reclosable packaging bag which accommodated the rectangular content by this invention. The figure which shows the package which accommodated the rectangular content in the reclosable packaging bag by this invention. The top view of the reclosable packaging bag which concerns on other embodiment of this invention. Schematic of the sleeve used in the reclosable packaging bag shown in FIG. The fragmentary perspective view which shows the bending easy part in the linear fastener of the reclosable packaging bag shown in FIG. Sectional drawing which shows the sealing assistance means provided in the bending easy part shown in FIG. Sectional drawing which shows the modification of the sealing assistance means shown in FIG. Schematic which shows the manufacturing process of the reclosable packaging bag of this invention. Schematic which shows the other manufacturing process of the reclosable packaging bag of this invention. The top view which shows other embodiment of the reclosable packaging bag by this invention. The elements on larger scale which show the stopper part of the reclosable packaging bag of FIG. The figure which shows the modification of the sleeve of FIG. The figure which shows the modification of the sleeve of FIG. The perspective view which shows an example of the bottom part formation method used in the reclosable packaging bag of this invention. The perspective view which shows another example of the bottom part formation method used in the reclosable packaging bag of this invention. The figure which shows the bottom part of the reclosable packaging bag obtained by an example of the bottom part formation method shown in FIG. The top view of the conventional reclosable packaging bag.

Explanation of symbols

10, 50, 70, 80, 90, 100 Self-supporting reclosable packaging bag 11, 12, 13, 51, 52, 70f, 80f Film wrapping material 14, 54, 74, 84, 94, 104 Packaging bag body 15, 55, 75, 85, 95 Linear fasteners 16, 56, 76, 86, 96 Side heat seal portions 17, 77, 87 Lower end heat seal portions 18, 58 Female fastener portions 19, 59 Male fastener portions 30 Film wrap Material 58a, 59a Easy folding portion 60, 60M1, 60M2 Sleeve 60cx, 60dx Protrusion 60cy, 60dy Reinforceable flap 96a, 96b Stopper portion

Claims (1)

  A sleeve that is folded into a predetermined three-dimensional shape by a fold line is provided inside the packaging bag body, and the packaging bag body is folded in accordance with the three-dimensional shape defined by the sleeve and held in the predetermined three-dimensional shape. A packaging bag characterized by that.

Images