JP2013067397A - Resealable packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag that can be repeatedly resealed by bending a laminate near an opening without using a separate component such as a zip fastener or a resealable laminated tape after opening the sealed packaging bag and taking out the content as much as required.SOLUTION: The packaging bag using the laminate having a heat-adhesive resin layer for the innermost layer is formed by superposing the surface of the heat-adhesive resin layer to face each other, and heat-bonding the peripheral edge to provide a peripheral edge heat-bonded part to thereby seal the content. The peripheral edge heat-bonded part includes at least an upper edge heat-bonded part, side edge heat-bonded parts, and oblique edge heat-bonded parts for connecting the side edge heat-bonded parts to both ends of the upper edge heat-bonded part. A strip material is placed on one inner surface of the laminate in a direction to intersect the side edge heat-bonded parts formed on the right and left sides, and the peripheral edge of the strip material is heat-bonded to the inner surface of the laminate. An opening bend holding part provided with an opening line in a region that corresponds to the strip material of the laminate is further formed to provide the resealable packaging bag.

Description

  The present invention relates to a packaging bag that can be resealed repeatedly by opening the contents such as food and non-food after packaging and bending the opening.

Conventionally, a packaging bag that has been laminated and filled with contents, and then heat-sealed and sealed, after opening, after removing the contents from the opening as much as necessary, using tools such as clips and rubber bands. The opening is fixed and resealed. However, this operation is troublesome because it requires tools such as clips and rubber bands to reseal. Therefore, a packaging bag in which a male and female nail type chuck made of synthetic resin is provided on the inner side surface of the opening is known as a packaging bag that can perform these reseal operations easily (see, for example, Patent Document 1).
In addition, it consists of two laminated materials, front and back, and has an upper seal part on one side of the bag body, an opening on the opposite side, side seal parts on both sides, and an upper seal The side seal part has a mouth-like unsealed part at the corner where one side seal part intersects, and the end of the side seal part adjacent to the upper seal part on the unsealed part side has a notch, and the tip of the notch The perforated line extends in parallel with the upper seal part from the other side seal part to the end of the other side seal part. The upper seal part and the side seal parts on both sides sandwich the resealable laminated tape from both sides in the form of a sandwich from both sides and are sealed. Resealable packaging bags are known (eg See Patent Document 2).

  However, in the packaging bag provided with the chuck of Patent Document 1 at the opening, since the chuck is required as a separate part, a part cost is required, and further, an area for attaching the chuck is required. There is a problem that the size must be increased excessively. Further, according to the resealable packaging bag of Patent Document 2, a resealable laminated tape is required as a separate part, so there is a cost for parts, and an area for attaching the resealable laminated tape is also required. Only the problem is that the size of the packaging bag has to be increased extra.

JP-A-4-154558 JP 2006-199343 A

  Accordingly, the present invention has been made to solve the above-mentioned problems, and the object of the present invention is to take out as much of the contents as necessary after opening the packaging bag which is filled with the contents and thermally bonded and sealed. After that, without using separate parts such as a chuck or resealable laminated tape, a packaging bag that can be repeatedly resealed by folding the laminate near the opening and sealing the repulsive force due to the rigidity of the laminate is provided. There is to do.

  In order to achieve the above-mentioned object, the present invention according to claim 1 uses a laminate having a heat-adhesive resin layer as an innermost layer, and faces the heat-adhesive resin layer surface of the laminate. In a packaging bag that overlaps and thermally bonds its periphery to provide a peripheral heat-bonding portion and seals the contents, the peripheral heat-bonding portion is formed on the left and right sides facing at least the upper-end edge heat-bonding portion It is composed of a thermal bonding part, a side edge thermal bonding part formed on the left and right sides, and an oblique edge thermal bonding part that connects both ends of the upper edge thermal bonding part. The belt is overlapped in a direction intersecting with the side edge thermal bonding portion formed on, and the periphery of the belt is thermally bonded to the inner surface of the laminated body, in a region corresponding to the belt of the laminated body An opening bending holding portion having a configuration in which an opening line is provided is formed. A sealable packaging bag.

  Further, the present invention according to claim 2 is the resealable packaging bag according to claim 1, wherein the wall bag is formed of two wall sheets made of the laminate and one bottom sheet. Place the heat-adhesive resin layer facing each other, fold it inward with the heat-adhesive resin layer side of the bottom sheet as the outer surface, insert it into the lower end between the two wall sheets, and heat-bond the periphery to the periphery A self-supporting bag provided with a thermal bonding portion, wherein the peripheral thermal bonding portion thermally bonds the upper end portions of the two wall sheets to the bottom edge portion between the two wall sheets; A bottom heat-bonding portion that is thermally bonded by inserting a sheet; a side edge heat-bonding portion that heat-bonds the left and right edges of the two wall surface sheets; the side edge heat-bonding portion that is formed on the left and right; One of the wall surface sheets is composed of an oblique edge thermal bonding portion that connects both ends of the upper edge thermal bonding portion. On the inner surface, it is characterized in that said opening bent holding portion.

  According to the present invention, a band material is superposed on one inner surface of a laminated body in a direction intersecting the side edge thermal bonding portions formed on the left and right sides, and the periphery of the band material is thermally bonded to the inner surface of the laminated body. When the laminated body is opened from the opening line, the opening bent holding part is formed by forming the opening bending holding part having a configuration in which the opening line is provided in the region corresponding to the band material. After the opening is formed by opening the packaging bag along the upper edge thermal adhesive part and cutting the upper edge thermal adhesive part, the laminated body near the opening part of the laminated body is re-sealed. By inserting the bent tip portion into the insertion port, the repulsive force due to the rigidity of the laminate can be sealed, and the packaging bag can be resealed. Further, since the strip is provided on the inner surface of the laminated body, it is not caught during handling or transportation of the packaged product, so that the packaging bag can be prevented from being damaged.

  Further, the opening line is provided between the side edge thermal bonding portions formed on the left and right sides, and the left and right lengths of the upper edge thermal bonding portions are made smaller than the left and right lengths between the inner edges of the side edge thermal bonding portions and The left and right dimensions of the opening formed by opening the upper edge thermal adhesive part and cutting the upper edge thermal adhesive part are held by opening the laminate from the opening line. Since it can be made smaller than the left and right dimensions of the insertion port formed in the part, the insertion operation to the insertion port at the tip of the opening becomes easy.

  Since the opening bent holding part is formed on one inner surface of the laminate, there is no need to provide a separate mounting area, so the area of the packaging bag can be reduced compared to a conventional packaging bag that requires a separate part mounting area. It can be reduced and the cost can be reduced.

It is a front view which shows 1st embodiment of the packaging bag which concerns on this invention. It is the sectional view on the AA line of FIG. 1, and a principal part expanded sectional view. It is a perspective view explaining the state which bends an opening part and reseals after opening of the packaging bag which concerns on this invention. It is a front view which shows 2nd embodiment of the packaging bag which concerns on this invention. FIG. 5 is a cross-sectional view taken along line B-B in FIG. It is a perspective view explaining the state which bends an opening part and reseals after opening the packaging bag of 2nd embodiment.

The above-described present invention will be described in detail below with reference to the drawings.
FIG. 1 is a front view showing a first embodiment of a packaging bag according to the present invention. FIG. 2A is a cross-sectional view taken along the line AA of FIG. FIG. 3 is an enlarged view, FIG. 3 is a perspective view illustrating a state in which the opening is folded and resealed after opening the packaging bag according to the present invention, and FIG. 4 is a front view illustrating a second embodiment of the packaging bag according to the present invention. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4 and an enlarged cross-sectional view of the main part, and FIG. 6 is a perspective view illustrating a state in which the opening is folded and resealed after the packaging bag of the second embodiment is opened. In the figure, 1 is a re-sealable packaging bag, 1 'is a self-supporting bag, 2 is a laminated body, 3 is a peripheral heat bonding portion, 4 is a top edge heat bonding portion, 5 is a side edge heat bonding portion, and 6 is diagonal. Edge thermal bonding part, 7 is bottom thermal bonding part, 8 is a strip, 8u is upper peripheral thermal bonding part, 8d is lower peripheral thermal bonding part, 9 is an opening wire, 10 is an opening bending holding part, 11 is a small bag, 12 is Insert, 13 is a notch, 14 is an opening, 20 is a base material layer, 21 is a printing layer, 22 is an intermediate layer, 23 is a thermoadhesive resin layer, 24 is a wall sheet, 25 is a bottom sheet, and 26 is a bottom. A thermal bonding part is shown, respectively.

  FIG. 1 is a front view showing a first embodiment of a packaging bag according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and an enlarged cross-sectional view of the main part, as shown in FIGS. The resealable packaging bag 1 of the first embodiment of the present invention uses a laminate 2 having a heat-adhesive resin layer as the innermost layer, and the heat-adhesive resin layer surfaces of the laminate 2 are overlapped facing each other. The periphery is thermally bonded to provide a peripheral heat bonding portion 3 to seal the contents.

  The re-sealable packaging bag 1 has a peripheral thermal bonding portion 3 at least an upper edge thermal bonding portion 4, side edge thermal bonding portions 5, 5 formed on the left and right sides, and side edges formed on the left and right. The edge thermal bonding portions 5 and 5 and the oblique edge thermal bonding portions 6 that connect both ends of the upper edge thermal bonding portion 4 are formed. The left and right lengths of the edge thermal bonding portion 4 are configured to be smaller than the left and right lengths between the inner edges of the side edge thermal bonding portions 5 and 5, and the other laminate 2 (the laminate on the surface in FIG. 1) An opening bent holding part 10 is formed.

  The opening bent holding portion 10 has an upper end edge in a direction intersecting the side edge thermal bonding portions 5 and 5 formed on the left and right sides on one inner surface of the laminated body 2 (in FIG. 1, the inner surface of the front laminated body). The band 8 is overlapped along the heat bonding portion 4, the peripheral edge of the band 8 is thermally bonded to the inner surface of the laminated body 2, and is partitioned into small pouches 11. Is provided with an opening 9. The position where the opening bent holding part 10 is formed is arbitrary as long as it is formed across the side edge thermal bonding parts 5, 5, and the side edge thermal bonding part 5 and the oblique edge thermal bonding part 6 are connected. It may be formed across the part. The unsealing line 9 is formed so as to be inscribed or circumscribed to the side edge thermal bonding portions 5 and 5. In particular, when the opening bent holding portion 10 is formed across the connecting portion of the side edge thermal bonding portion 5 and the diagonal edge thermal bonding portion 6, the opening line 9 is not applied to the diagonal edge thermal bonding portion 6. It is important to do. The opening line 9 is formed by a cut line, a perforation, or a half cut that penetrates the laminate 2. Moreover, the opening line 9 can also be made into two.

Further, the structure of the opening bent holding portion 10 will be described with reference to FIG.
As shown in the enlarged view of the main part in the circle in FIG. 2A, the strip 8 is superposed on one inner surface of the laminate 2, and the periphery of the strip 8 is thermally bonded to the inner surface of the laminate 2. . FIG. 2 shows an upper peripheral thermal adhesive portion 8u and a lower peripheral thermal adhesive portion 8d among the peripheral edges thermally bonded to the laminated body 2 of the strips 8. The left and right peripheral thermal adhesive portions are laminated, although not shown. It is shared with the side edge thermal bonding portions 5 and 5 of the body 2, and the opening bent holding portion 10 is a sachet 11 whose periphery is thermally bonded with the laminated body 2 and the band material 8. An unsealing line 9 is provided in an area corresponding to the strip 8. The laminated body 2 in the portion where the open wire 9 is provided has a gas barrier property such as water vapor permeability and oxygen gas permeability, but the band material 8 exists inside the open wire 9 and the periphery is the laminated body 2. Since the inside of the bag of the re-sealable packaging bag 1 can be kept in a sealed state by using a material having a gas barrier property, the re-sealable packaging bag 1 can be maintained. The gas barrier property is not affected. In addition, the strip | belt material 8 can also extend and provide a lower part to the lower edge of a packaging bag, Furthermore, it can also extend and provide an upper part to an upper end edge thermal bonding part. When the upper and lower portions of the strip 8 are extended to the lower and upper edge thermal bonding portions of the packaging bag, the peripheral thermal bonding portion of the strip 8 and the peripheral thermal bonding portion 3 of the resealable packaging bag 1 are shared. In the form of a so-called double bag partitioned into two chambers by the band material 8.

  FIG. 2 (b) is a partially enlarged view showing an example of the laminated body, and the laminated body 2 is formed from the outer side toward the inner side which is the inside of the bag, the base layer 20, the printed layer 21, the intermediate layer 22, and the innermost layer. The thermal adhesive resin layer 23 is laminated in order. The material used for each layer is appropriately determined in consideration of the physical properties, gas barrier properties, packaging suitability, transportation conditions of the packaged goods, economy, and the like required for the laminate. Of course, the printing layer, the intermediate layer, or the printing layer and the intermediate layer can be omitted depending on required conditions.

Next, the usage method of the resealable packaging bag 1 of this invention is demonstrated, referring FIG. 1, FIG.
As shown in FIG. 1, the laminated body 2 is torn and opened from a notch 13 provided at the top of a resealable packaging bag 1 filled with contents (not shown) and sealed. After removing the necessary contents from the opening 14 formed by opening (see FIG. 3), when re-sealing, first, the lamination in the vicinity of the opening line 9 formed of the perforation provided in the laminate 2 The upper part and the lower part of the body 2 are picked with a finger and pulled in the opposite directions to open, thereby forming the insertion port 12. Next, the packaging bag is folded between the opening bent holding portion 10 and the opening 14, and the distal end portion of the opening 14 is bent by being inserted into the insertion port 12 formed in the opening bent holding portion 10. The repulsive force due to the rigidity of the laminated body 2 can be sealed, and the packaging bag 1 can be resealed.

  In the present invention, the side edge thermal bonding portions 5, 5, the upper edge thermal bonding portion 4, and the upper edge thermal bonding portion 4 that are formed on the left and right sides are connected to both ends of the upper edge thermal bonding portion 4. 6 and the left and right lengths of the upper edge thermal bonding portion 4 are smaller than the left and right lengths between the inner edges of the side edge thermal bonding portions 5 and 5, and the upper edge thermal bonding portion 4 is cut and formed. The left and right lengths of the portion 14 are made smaller than the left and right lengths between the inner edges of the side edge thermal bonding portions 5 and 5, the unsealing line 9 is opened, and the insertion port is formed between the inner edges of the side edge thermal bonding portions 5 and 5. It is important that the left and right lengths of the insertion port 12 be wider than the left and right lengths of the opening portion 14 by forming 12, so that the insertion operation of the tip portion of the opening portion is facilitated. .

FIG. 4 is a front view showing a second embodiment of the packaging bag according to the present invention, and the resealable packaging bag of the second embodiment is in the form of a self-supporting bag 1 ′.
As shown in FIG. 4, the self-supporting bag 1 ′ is formed by two wall sheets 24 and a bottom sheet 25 (see FIG. 5) made of the laminated body 2, and the heat adhesive resin layer side of the two wall sheets 24 is formed. Arranged to face each other, with the heat-adhesive resin layer surface of the bottom sheet 25 as the outer surface, it is folded inward and inserted into the lower end between the two wall sheets 24, 24, and the peripheral edge is thermally bonded to the peripheral heat-bonding portion 3 It is the form which provided.

  As shown in FIGS. 4 and 5, the self-standing bag 1 ′ has a peripheral edge heat bonding portion 3 that heat-bonds the upper end portions of the two wall surface sheets 24, 24 and the two edge wall heat bonding portions 4, The bottom thermal bonding part 26 is formed by inserting the bottom sheet 25 at the lower end between 24 and thermally bonding, and the left and right edges of the two wall sheets 24 are thermally bonded to form the side edge thermal bonding part 5 on the left and right. The side edge thermal bonding portion 5 and the upper edge thermal bonding portion 4 are connected to both ends of the upper edge thermal bonding portion 4 and have a substantially C-shaped oblique edge thermal bonding portion 6. The wall surface sheet is formed with an opening bent holding portion 10.

  The opening bent holding portion 10 has an upper end edge in a direction intersecting with the side edge thermal bonding portions 5 and 5 formed on the left and right sides on one inner surface of the wall sheet 24 (in FIG. 4, the inner surface of the surface laminate). A region corresponding to the band material 8 of the wall surface sheet 24 is formed by superimposing the band material 8 along the heat bonding portion 4, and the peripheral edge of the band material 8 is thermally bonded to the inner surface of the wall surface sheet 24. Is provided with an opening 9. The position where the opening bent holding part 10 is formed is arbitrary as long as it is formed across the side edge thermal bonding parts 5, 5, and the side edge thermal bonding part 5 and the oblique edge thermal bonding part 6 are connected. It may be formed across the part. The unsealing line 9 is formed so as to be inscribed or circumscribed to the side edge thermal bonding portions 5 and 5. In particular, when the opening bent holding portion 10 is formed across the connecting portion of the side edge thermal bonding portion 5 and the diagonal edge thermal bonding portion 6, the opening line 9 is not applied to the diagonal edge thermal bonding portion 6. It is important to do. The opening line 9 is formed by a cut line, a perforation, or a half cut that penetrates the wall surface sheet 24.

  The resealable packaging bag of the second embodiment is the same as that of the first embodiment except that it is in the form of a self-supporting bag. Description of is omitted. Moreover, the usage method of a packaging bag is also the same and description is abbreviate | omitted.

Next, each layer of the laminate 2 will be described.
Since the base material layer 20 of the laminate 2 is a basic material constituting the resealable packaging bag 1 and the self-supporting bag 1 ', a synthetic resin having excellent properties in mechanical, physical, chemical, etc. Film made of polypropylene, polyethylene terephthalate, nylon, polyacrylonitrile, polyvinylidene chloride, polyvinyl alcohol, ethylene / vinyl alcohol copolymer, etc. An axially stretched film or the like can be used. Alternatively, a gas barrier resin composition such as polyvinylidene chloride or polyvinyl alcohol applied to the above film to provide a gas barrier layer, or aluminum, aluminum oxide, silicon oxide, indium oxide, tin oxide, zirconium oxide, etc. The thing which vapor-deposited the inorganic substance and provided the vapor deposition layer can be used. Moreover, as these films, an unstretched film or a film stretched in a uniaxial direction or a biaxial direction can be used, but a stretched film is more preferable. This is because usually the base material layer 20 is often printed, and printability is required. Further, the thickness of the film constituting the base material layer 20 may be a thickness that can be held to the minimum necessary for strength, rigidity, etc. as a basic material, and can be determined in consideration of costs and the like. Usually, it is about 9 to 50 μm.

  The intermediate layer 22 is provided when rigidity, light shielding properties, gas barrier properties, etc. are required according to packaging conditions, transportation conditions, contents protection function conditions, and the film used for the base material layer. The said film provided with the said gas barrier layer or a vapor deposition layer, metal foil, such as aluminum, iron, copper, and tin, paper, synthetic paper, paper, etc. can be used. Moreover, what laminated | stacked combining these films etc. 1 or more types may be used.

Further, the heat-adhesive resin layer 23 of the laminate 2 may be a layer formed from a heat-adhesive resin that can be melted by heat and welded to each other, and is appropriately selected depending on the physical properties required for the packaging bag. Low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene- Vinyl acetate copolymer, ionomer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, amorphous polyester, etc. It can be formed using the resin.
Gas barrier properties (oxygen barrier properties, water vapor barrier properties, etc.), light shielding properties and physical properties (tensile strength, heat seal, etc.) required for the contents to be packaged with the base material layer, intermediate layer, and thermal adhesive resin layer (Strength, impact strength, puncture strength, drop strength, etc.), transportation conditions, economy, etc., may be appropriately selected and laminated.

  Examples of the method of laminating the base material layer 20, the intermediate layer 22, and the heat-adhesive resin layer 23 include, for example, a dry lamination method of laminating by using a dry laminating adhesive such as urethane, or a hot melt extrusion of a polyethylene resin or the like. Laminate extrusion lamination methods can be used. The base layer 20 or the intermediate layer 22 can be provided with a printing layer 21 by ordinary gravure printing or flexographic printing, and known gravure ink and flexographic ink can be used as printing ink used for the printing, A vehicle that adheres well to the material is appropriately selected depending on the material used for the base material layer 20 or the intermediate layer 22, and a pigment, a solvent, various auxiliary agents, and the like are added to the vehicle and used.

The strip 8 must be heat-bondable to the innermost heat-adhesive resin layer 23 of the laminate 2 on both sides, and heat-adhesive such as linear (linear) low-density polyethylene or polypropylene. A resin film alone or a laminate in which a heat-adhesive resin layer is laminated on both sides is used, and a heat-adhesive resin layer / base material layer / thermal adhesive resin layer, heat-adhesive resin layer / base material layer / intermediate layer / The laminated body which becomes a thermoadhesive resin layer can be illustrated. The same material as the laminate 2 can be used for the heat-adhesive resin layer, the base material layer, and the intermediate layer.
Further, the adhesive force of the heat-adhesive resin layer of the strip 8 on the side facing the heat-adhesive resin layer 23 of the laminate provided with the opening line 9 may be weakly bonded, and the substrate layer and the heat-adhesive A co-extruded film can also be used for the resin layer or intermediate layer and the heat-adhesive resin layer. In this case, the thickness of the heat-adhesive resin layer is usually 40 μm or less. Moreover, what formed and apply | coated the heat-seal agent to the base material layer or the intermediate | middle layer can also be used. As the heat sealant, an emulsion type or a solution type mainly containing a resin such as an olefin type, a chlorinated polyelephine type, an acrylic type, an acrylic-vinyl chloride type, or an ethylene-vinyl acetate type is used, and the coating amount is 1 to 15 μm. (Dry state). Examples of the base polymer component include styrene-isoprene block copolymer, styrene-butadiene block copolymer, acrylic resin, ethylene-vinyl acetate copolymer, block copolymer of vinyl aromatic and conjugated diene, and its A hot melt obtained by singly or blending a hydrogenated product, an ethylene-α-olefin copolymer, a polyester resin, or the like can be used, and the coating amount is usually 30 μm or less.

  The resealable packaging bag of the present invention is manufactured using a three-side bag making machine, a four-side bag making machine, or a self-supporting bag making machine. However, since the band material is provided at the time of bag making, it is necessary to attach a sheet feeding unit that unwinds the band material wound in a roll shape as an auxiliary facility in addition to the sheet feeding unit that unwinds the laminated body. Then, the unwinding line is applied to a predetermined position of the laminated body while feeding the laminated body and the strip wound in a roll shape, and the laminated body and the band material are aligned so that the unsealed part is covered with the strip. The both ends of the strip in the flow direction are thermally bonded to the heat-adhesive resin layer surface of the laminate, and the strip is attached to the laminate in a cylindrical shape. Thereafter, the bag is made by a known procedure.

  EXAMPLES Next, an Example is given and this invention is explained in full detail.

Example 1
As shown in FIG. 1 and FIG. 2, a polyethylene terephthalate film (PET) having a thickness of 12 μm subjected to corona treatment on one side is used as the base material layer 20, and a printing layer 21 is formed on the corona treatment surface by gravure printing. 7 μm thick aluminum foil (AL) is used for the layer 22, 50 μm thick linear low density polyethylene (LLDPE) is used for the thermal adhesive resin layer 23, and a polyester polyol-isocyanate-based main agent is used as an adhesive, although not shown. A laminate 2 comprising PET 12 μm / printing layer / DL / AL 7 μm / DL / LLDPE 50 μm was produced by laminating by a dry laminating method using a two-component adhesive for dry laminating (DL) composed of a curing agent.
On the other hand, a 12 μm thick polyethylene terephthalate film (ALVMPET) vapor-deposited on one side as a base material layer and a 30 μm thick linear low density polyethylene (LLDPE) as a thermal adhesive resin layer are used. Lamination was carried out with the adhesive (DL), and a laminate of LLDPE 30 μm / DL / ALVMPET 12 μm / DL / LLDPE 30 μm was produced and used as a strip 8.
The laminated body 2 and the band material 8 are used to thermally bond the peripheral edges, and the band material 8 is attached to the connecting portion between the oblique edge thermal bonding portion 5 and the side edge thermal bonding portion 6 as shown in FIGS. A resealable packaging bag 1 was produced with the upper end positioned. The form of the re-sealable packaging bag was a four-side sealed bag in which the side facing the upper edge thermal bonding part 4 was an opening. After the opening is filled with contents from the opening, the opening is hermetically sealed to become a heat-bonding portion at the lower edge. The dimensions of the resealable packaging bag were as follows.
Top and bottom left and right dimensions: 190mm x 140mm
Top and bottom dimensions (height) of side edge thermal bonding part: 130mm
Left and right outer dimensions of the top edge thermal bonding part: 100 mm
Top and bottom of band material: 50mm x 140mm
Seal width of the peripheral thermal bonding part: 10 mm
Opening line shape: perforation with a cut length of 40 mm and a non-cut length of 1 mm

(Example 2)
As shown in FIGS. 4 and 5, a self-supporting bag 1 ′ having a boat-shaped bottom thermal bonding portion 26 was produced. The laminate 2 produced in Example 1 was used for the wall sheet 24 and the bottom sheet 25. However, the bottom sheet 25 was plain without providing a printing layer on PET. The strip 8 has a polyethylene terephthalate film (PET) having a thickness of 12 μm on one side as a base material layer, an aluminum foil (AL) having a thickness of 7 μm as an intermediate layer, and a linear low-temperature having a thickness of 30 μm as a thermal adhesive resin layer. Using a density polyethylene (LLDPE) and laminating through the adhesive (DL) used in Example 1 by a dry laminating method, a laminate of LLDPE 30 μm / DL / PET 12 μm / DL / AL 7 μ / DL / LLDPE 30 μm was prepared. Using. The position of the strip 8 was the same as in Example 1. The upper edge thermal bonding portion 4 is an unsealed opening before filling the contents, and after filling the contents from the portion, the upper edge thermal bonding portion 4 is hermetically sealed to become the upper edge thermal bonding portion 4. is there. Others were the same as in Example 1.
Top and bottom left and right dimensions: 190mm x 140mm
Top and bottom dimensions (height) of side edge thermal bonding part: 130mm
Left and right outer dimensions of the top edge thermal bonding part: 100 mm
Folding dimension of bottom material: 30mm
Top and bottom of band material: 50mm x 140mm
Seal width of the peripheral thermal bonding part: 10 mm
Opening line shape: perforation with a cut length of 40 mm and a non-cut length of 1 mm

  After filling a granular candy as a content from the opening part of the four-sided seal bag of Example 1, it heat-bonded and the lower end edge heat-bonding part was formed and sealed. After filling a granular candy as a content from the opening part of the self-supporting bag of Example 2, it heat-bonded and formed the upper-end edge heat-bonding part, and sealed.

Then, open the vicinity of the thermal bonding part at the upper edge to form an opening, take out a predetermined amount of contents, then pull the upper part of the opening line with one hand and the lower part with the other hand and pull in the opposite direction The laminate could be easily torn, and both the first and second examples could form an insertion port.
Furthermore, when the vicinity of the opening was folded and the tip portion was inserted into the insertion port, the packaging bag could be kept in a folded state, and both Example 1 and Example 2 could be resealed.

DESCRIPTION OF SYMBOLS 1 Re-sealable packaging bag 1 'Self-supporting bag 2 Laminated body 3 Edge thermal bonding part 4 Upper edge thermal bonding part 5 Side edge thermal bonding part 6 Diagonal edge thermal bonding part 7 Bottom thermal bonding part 8 Band material 8u Upper part Peripheral thermal bonding part 8d Lower peripheral thermal bonding part 9 Opening line 10 Opening part bending holding part 11 Pouch 12 Insert 13 Notch 14 Opening 20 Base material layer 21 Print layer 22 Intermediate layer 23 Thermal adhesive resin layer 24 Wall surface Sheet 25 Bottom sheet 26 Bottom heat bonding part

Claims (2)

Using a laminated body having a heat-adhesive resin layer as the innermost layer, the heat-adhesive resin layer surfaces of the laminated body are overlapped facing each other, and the periphery is thermally bonded to provide a peripheral heat-bonded portion to seal the contents. In the packaging bag,
The peripheral thermal bonding part is at least the upper edge thermal bonding part, the side edge thermal bonding part formed on the left and right sides, the side edge thermal bonding part formed on the left and right, and the upper edge thermal bonding part. Consists of a slanted edge thermal bonding part that connects both ends,
On one inner surface of the laminate, a strip is overlapped in a direction intersecting with the side edge thermal bonding portion formed on the left and right sides, and the periphery of the strip is thermally bonded to the inner surface of the laminate, A re-sealable packaging bag, wherein an opening bent holding part having a structure in which an opening line is provided in a region corresponding to the band member of the body is formed. The packaging bag is formed of two wall sheets made of the laminate and one bottom sheet, and the two wall sheets are disposed so that the thermal adhesive resin layer sides face each other, and the bottom sheet is thermally bonded. A self-supporting bag that is folded inside and inserted into the lower end portion between two wall sheets, and thermally bonded at the periphery to provide a peripheral heat-bonded portion,
The peripheral edge heat bonding part is a heat bonding part at the upper edge where the upper end part of the two wall surface sheets is heat bonded, and the bottom part heat bonding where the bottom sheet is inserted into the lower end part between the two wall surface sheets and heat bonded. A side edge heat-bonding part that thermally bonds the left and right edges of the two wall sheets, and a diagonal that connects both ends of the side edge heat-bonding part and the upper edge heat-bonding part that are formed on the left and right It consists of an edge thermal bonding part,
2. The resealable packaging bag according to claim 1, wherein the opening bent holding portion is formed on an inner surface of the one wall sheet.

Images