JP2008150111A - Easily openable packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily openable packaging bag which can be easily opened so as to form a wide opening part along an openable cutout line by an openable knob part, so that a content is taked out. <P>SOLUTION: In the packaging bag, inner layers of a rectangular base body 5 are opposite to each other, side end edge heat-bonded parts are provided on a set of opposing end edges, and an end edge heat-bonded part is provided on one edge orthogonal to the side end edge heat-bonded part, and a substantially V-shaped bulkhead heat-bonded part having a bent part across the side end edge heat-bonded parts with respect to the end edge heat-bonded part side is provided and heat-bonded peelably at the side end edge heat-bonded parts and the bulkhead heat-bonded part. A cutout line penetrating a base body constituting one side is formed in an area on the end edge heat-bonded part of a bent part of the bulkhead heat-bonded part to provide an openable knob part 12. An openable cutout line penetrating the base body is formed along the bulkhead heat-bonded part from each end of the cutout line of the openable knob part, and the packaging bag is opened along the openable cutout line from the openable knob part 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging bag for storing solid, granular confectionery, food, medicine, cosmetics, or the like, and more specifically, a wider opening is formed along the opening cut line than the opening knob. The present invention relates to an easy-open packaging bag that can be opened easily.

  Conventionally, snack confectionery, snack foods, salmon, biscuits, snacks, etc. are directly stored in packaging bags such as four-side seal, three-side seal, gusset type, or self-supporting type with a gusset portion at the bottom.

  These packaging bags are provided with notches such as an I shape, a V shape, and a turtle shell shape as opening opening means in order to facilitate opening (for example, see Patent Document 1). Further, a packaging bag is disclosed in which the opening means is used in combination with a plastic film in which a straight easy tear film is laminated in order to improve the opening property, and further, an opening break is provided in connection with the opening means. (For example, refer to Patent Document 2). However, these packaging bags are configured such that the edges are opened. For example, in the case of a packaging bag containing potato chips or the like, when the potato chips or the like are consumed and reduced, the bottom of the packaging bag is removed. There are inconveniences that it has to be taken out as if looking into it, and it is difficult to take out, and there is a problem that the back and palm of the hand are soiled in addition to the finger that picks up the potato chip in order to put the hand deeply.

An opening / closing lid made of an airtight film that has a center seal portion and both end seal portions, and is formed with a take-out port provided with a cut portion for separation on the other surface facing the center seal portion. There is known a rectangular cosmetic encapsulating bag provided with (for example, see Patent Document 3). The opening of the enclosing bag is provided in the center of the bag so that the contents can be easily taken out. However, when the airtight film covering the cut portion is fixed, the film or the sheet material constituting the encapsulating bag may be wrinkled. In such a case, sufficient airtightness cannot be obtained. For example, moisture absorption such as rice crackers or biscuits If the confectionery is rich, the confectionery may absorb moisture and the taste may be significantly reduced. Moreover, since an airtight film is required as a separate part, there is a problem that the cost increases.
Utility Model Registration No. 3001221 Japanese Patent Laid-Open No. 10-167317 Japanese Patent Publication No. 2-30948

  Therefore, the present invention has been made to solve the above problems, and can be easily opened so that a wide opening can be formed along the opening cut line from the opening knob, so that the contents can be taken out easily. To provide packaging bags.

  In order to achieve the above object, the present invention according to claim 1 is directed to a rectangular substrate having at least a base material layer and an inner layer made of a heat-adhesive resin, with the inner layers facing each other. The side edge thermal bonding portion at a pair of opposite end edges and the edge thermal bonding portion at one edge perpendicular to the side edge thermal bonding portion and the edge thermal bonding portion side with respect to the edge thermal bonding portion side. A packaging bag that is provided with a substantially U-shaped partition wall thermal bonding portion that has a bent portion across the side edge thermal bonding portion, and is thermally bonded so as to be peelable at the side edge thermal bonding portion and the partition thermal bonding portion. The opening portion of the bent portion is surrounded by the edge thermal bonding portion side region, a cut line is formed through the base constituting the one surface, and an opening knob is provided. From the both ends of the cut line of the knob or the vicinity thereof, the partition thermal bonding portion or the unsealed portion around the outer edge thereof An opening cut line that penetrates through the base constituting the one surface is provided along the partition heat-bonding portion, and the opening is opened along the opening cut line from the opening knob. It is an easy-open packaging bag.

  Further, the present invention according to claim 2 is composed of a front side sheet, a back side sheet and a bottom sheet provided with at least a base material layer and an inner layer made of a heat-adhesive resin. The inner layer surfaces are arranged to face each other, and the bottom sheet, which is mountain-folded at the center with the inner layer surface outside, is inserted between the lower portions of the sheets to face the inner layer surfaces of the front and back side sheets. The edge between the outer surfaces of the folded bottom sheet is thermally bonded to form a bottom portion, and a pair of opposite end edges of the front and back side sheets are connected to a side edge thermal bonding portion and an edge facing the bottom portion. In a self-supporting packaging bag provided with an edge thermal bonding portion, a substantially square shape having a bent portion that is thermally bonded so as to be peelable across the side edge thermal bonding portion with respect to the lower end side of the bottom portion on the bottom portion. The partition wall thermal bonding portion is provided, and in front of the bent portion The lower end side region of the bottom portion surrounds the bent portion, and either one or both of the front and back side sheets are provided with a tear line penetrating the front and back side sheets, and an opening knob is provided, the opening knob An opening that penetrates the front and back side sheets through either or both of the front and back side sheets along the partition thermal adhesive part from the both ends of the cut line or in the vicinity thereof to the unsealed part of the partition thermal adhesive part or the outer periphery thereof. It is an easily openable packaging bag provided with a cut line for opening and opening along the opening cut line from the opening knob.

  Further, the present invention described in claim 3 is the easy-open packaging bag according to claim 1 or 2, characterized in that the opening cut line is a half cut that does not penetrate through the substrate.

  Further, the present invention according to claim 4 is the easily openable packaging bag according to claim 1 or 2, wherein the opening cut line is formed by intermittent cuts, and the cuts are parallel to the partition thermal bonding portion. And a hatched portion extending obliquely at an obtuse angle with respect to the linear portion from the rear end side toward the side edge thermal adhesive portion with respect to the direction of the opening knob portion of the linear portion. The tip of the first cut is formed so as to be connected to both ends of the cut line of the opening knob or in the vicinity thereof.

  Further, the present invention according to claim 5 is the easily openable packaging bag according to any one of claims 1 to 4, wherein the bent portion of the substantially heat-separated partition wall heat bonding portion is the edge heat bonding. Or a mountain-shaped seal portion having one or a plurality of protruding portions protruding to the edge thermal bonding portion side or the bottom lower end side. Is provided.

  Moreover, this invention of Claim 6 is an easily openable packaging bag in any one of Claims 1-4. WHEREIN: The said bending part of the said substantially square-shaped said partition heat bonding part is the said edge thermal bonding. It is characterized in that there is provided at least one shed-like seal portion projecting to the part side or the bottom lower end side.

  Moreover, this invention of Claim 7 is an easily openable packaging bag in any one of Claims 4-6. WHEREIN: The rear end of the said cut | interruption cut line, and the front-end | tip of the linear part of the next cut | interruption Are aligned with the opening direction or at least overlap with each other.

  Moreover, this invention of Claim 8 is an easily openable packaging bag in any one of Claim 3, 5 or 6 WHEREIN: The front end by the side of the said opening knob | pick part of the said opening cut line which consists of the said half cut Is formed in a U-shape.

  Further, the present invention according to claim 9 is the easily openable packaging bag according to any one of claims 4 to 7, wherein the front end of the straight portion of the first cut forming the opening cut line is U. It is formed in the shape of a character.

  Moreover, this invention of Claim 10 is formed in the said edge thermal-bonding part or the said bottom lower end facing the said opening knob | pick part in the easily openable packaging bag in any one of Claims 1-9. Further, a projecting seal portion is provided to surround the opening knob from the lower end edge thermal bonding portion.

  Moreover, this invention of Claim 11 is an easily openable packaging bag in any one of Claims 1-10. WHEREIN: The said edge thermal bond part, the said side edge thermal bond part, and the said partition thermal bond part An unsealed region surrounded by the projecting seal part, or an unsealed region surrounded by the lower edge thermal adhesive part, the side edge thermal adhesive part, the partition thermal adhesive part, and the projecting seal part forming the bottom part. A point seal portion is provided in the seal region.

  The easy-open packaging bag according to claim 1, wherein the base is attached to a substantially U-shaped partition heat-bonding portion having a bent portion that is heat-bonded so as to be peeled off, and the partition heat-bonding portion or an unsealed portion around the outer edge thereof. A tear line for opening is provided, enclosing the bent part of the partition heat-bonding part, and a tear line penetrating the base constituting one surface is formed and a picking part for opening is provided for easy opening. Pick the knob with your fingers and open it easily so that a wide opening is formed along the opening cut line, making it easy to take out the contents and smearing the back and palm of your hand even if the contents are low The contents can be taken out. Further, the opening line of the opening knob and the opening line of the opening are provided in the partition thermal bonding portion or the unsealed portion around the outer edge thereof, the partition thermal bonding portion, the side edge thermal bonding portion, and the edge thermal bonding portion. As a result, the barrier property and moisture resistance of the sealed and easily openable packaging bag are ensured, and moisture absorption prevention of the contents to be stored can be achieved.

  The easy-open packaging bag according to claim 2 is provided with a substantially U-shaped partition wall heat-bonding portion having a bent portion that is heat-bonded to the bottom portion so as to be peelable, and the bent portion is provided at a bottom lower end side region of the bent portion. A cut line that penetrates the front and back side sheets is formed on one or both of the front and back side sheets, and an opening knob is provided, and the opening knob is easily picked with fingers, and the opening cut line is formed. Can be easily opened along. In addition, the break line for opening is provided along the partition wall heat-bonded portion on the partition wall heat-bonded portion provided at the bottom or the unsealed portion around the outer edge, and the barrier property and moisture-proof property of the easy-open packaging bag are In addition, since the partition wall heat bonding portion, the side edge heat bonding portion, and the edge heat bonding portion are sealed and secured, it is possible to prevent moisture absorption of the contained contents.

  Further, the easy-open packaging bag according to claim 3 is configured such that the opening cut line is made of a half cut that does not penetrate the base, and the base constituting one surface when opened from the opening knob is, The opening line can be opened without losing the opening line, and the opened opening line is beautiful. Further, the substrate can be prevented from being broken or mischievous at the opening cut line due to vibration or shock during distribution.

  The easy-open packaging bag according to claim 4, wherein the opening cut line consists of intermittent cuts, the cut line extending in a direction parallel to the partition wall heat-bonding part, and the opening part of the straight part. With the oblique line extending obliquely at an obtuse angle with respect to the linear part from the rear end side toward the side edge thermal bonding part with respect to the direction of the first end of the opening of the opening knob. Are formed in the vicinity of or in the vicinity thereof, and when opened from the opening knob, there is an effect that the substrate constituting one surface can be opened without detaching from the opening cut line.

  Further, the easy-open packaging bag according to claim 5 has a straight portion of a predetermined length parallel to the edge thermal bonding portion side or the bottom lower end at the bent portion of the substantially U-shaped partition wall thermal bonding portion, The straight part is provided with an edge thermal bonding part or a mountain-shaped seal part with one or a plurality of protruding parts protruding to the bottom lower end side, which can reduce the tensile force required at the initial stage of opening, and is a pick for opening The part can be easily peeled by pulling the part, and can be opened smoothly.

  Further, the easy-open packaging bag according to claim 6 is provided with at least one lip-shaped sealing portion in which a bent portion of the substantially U-shaped partition wall thermal bonding portion projects toward the edge thermal bonding portion side or the bottom lower end side. The pulling force required in the initial stage of opening can be further reduced, and the opening knob can be pulled to start opening smoothly.

  Further, the easy-open packaging bag according to claim 7 is formed such that the rear end of the opening cut line and the front end of the straight line of the next cut coincide with each other or at least overlap. Therefore, when the opening knob is pulled and opened, it is possible to prevent the opening from being removed from the opening cut line so that it cannot be opened, and the opening can be opened along the opening cut line.

  Further, the easy-open packaging bag according to claim 8 has a structure in which the tip on the side of the opening knob portion of the opening cut line made of a half cut is formed in a U-shape, so that the opening opening knob portion It is possible to prevent the substrate from being torn from the tip of the opening cut line when the substrate is torn from both ends of the cut line of the opening knob when opened and the tearing direction is guided by the opening cut line. Further, the easy-open packaging bag according to claim 9 has a configuration in which the tip of the straight part of the first cut forming the opening cut line is formed in a U-shape, so that the opening picking part has It is possible to prevent the substrate from being torn from the tip of the opening cut line when the substrate is torn from both ends of the cut line of the opening knob when opened and the tearing direction is guided by the opening cut line.

  Further, the easy-open packaging bag according to claim 10 is provided with a protruding seal portion surrounding the opening knob from the edge thermal bonding portion facing the opening knob or the lower edge thermal bonding portion formed at the bottom lower end. The bottom edge thermal bonding that forms the bottom or the unsealed area surrounded by the edge thermal adhesive part, the side edge thermal adhesive part, the partition thermal adhesive part, and the protruding seal part from the cut line of the opening knob The entry of foreign matter into the unsealed region surrounded by the portion, the side edge thermal bonding portion, the partition thermal bonding portion, and the protruding seal portion can be reduced. Moreover, the easily openable packaging bag of Claim 11 is the lower end which forms the unsealed area | region enclosed by the edge thermal-bonding part, the side edge thermal-bonding part, the partition thermal-bonding part, and the protrusion sealing part, or a bottom part. Unsealed from the cut line of the opening knob by adopting a configuration in which a point seal part is provided in the unsealed area surrounded by the edge thermal adhesive part, the side edge thermal adhesive part, the partition thermal adhesive part, and the protruding seal part. The entry of foreign matter into the area can be further reduced.

The above-described present invention will be described below with reference to the drawings.
1 is a plan view showing a first embodiment of an easy-open packaging bag according to the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. 3 is a cut line and a cut in the circle of FIG. FIG. 4 is an enlarged view, FIG. 4 is a perspective view showing a state in the middle of opening of the easy-open packaging bag, FIG. 5 is a plan view showing a second embodiment of the easy-open packaging bag according to the present invention, and FIG. FIG. 7 is a plan view showing a third embodiment of the easy-open packaging bag according to the present invention, and FIG. 8 is a plan view showing a fourth embodiment of the easy-open packaging bag according to the present invention. Yes, symbols 1, 21, 31, and 41 in the figure are easy-open packaging bags, 2 is a base material layer, 3 is an intermediate layer, 4 is an inner layer, 5 is a base body, 6 and 26 are side edge thermal bonding portions, 7, 27, and 37 are upper edge thermal adhesive portions, 7 ′ and 27 ′ are lower edge thermal adhesive portions, 8, 28 and 38 are partition thermal adhesive portions, 9, 29, and 39 are bent portions, and 9 a and 29 a are linear portions. , b, 29b are chevron-shaped seal parts, 10, 30, 310 are cut lines, 11, 31 are opening knobs, 12, 32, 312, and 412 are opening cut lines, 13 are cut lines, 13a is a straight part, 13b Is the hatched portion, 13h is the leading end of the cut, 13t is the trailing end of the cut, 131 and 131 'are the first cut, 132 is the second cut, 133 is the third cut, 14 is the tear piece, and 15 is the opening , 22 is a front side sheet, 23 is a back side sheet, 24 is a bottom sheet, 25 is a bottom part, 39c is a hook-like seal part, 39d is a curved seal part, 131'h is the tip of the first cut, 312h Is the tip of the opening cut line, A is a notch, P is a point seal, R is an unsealed region, and S is a protruding seal.

  1st embodiment of the easy-open packaging bag of this invention is as showing in FIG. 1, FIG. The easy-open packaging bag 1 of the present invention is opposed to a rectangular base 5 having a base layer 2, an intermediate layer 3, and an inner layer 4 made of a heat-adhesive resin, with the inner layers 4 facing each other. A pair of both end edges are sealed with a side edge thermal bonding portion 6 and another set of upper and lower edge thermal bonding portions 7 and 7 ′ orthogonal to and opposed to the side edge thermal bonding portion 6. A substantially U-shaped partition wall thermal bonding portion 8 having a bent portion straddling the side edge thermal bonding portions 6 and 6 with respect to the thermal bonding portion 7 side is provided, and the side edge thermal bonding portion 6 and the partition thermal bonding portion are provided. 8 is an easy-open packaging bag of a four-side seal type that is heat-bonded so as to be peelable. The bent portion 9 of the partition wall heat-bonding portion 8 has a straight portion 9a having a predetermined length parallel to the upper-end edge heat-bonding portion 7, and surrounds the bent portion 9 in the region on the upper-end edge heat-bonding portion 7 side of the bent portion 9. A cut line 10 penetrating through the base 5 constituting the surface of the plate is formed, and an opening knob 11 is provided. From both ends of the cut line 10 of the opening knob 11, the partition wall thermal adhesive portion 8 or the outer periphery around the outer edge is not provided. An opening cut line 12 that penetrates through the base body 5 constituting one surface is provided along the partition wall heat bonding portion 8 in the seal portion. The cut line 10 can be provided in the partition thermal bonding portion 8, but is preferably provided in an unsealed portion around the outer edge of the partition thermal bonding portion 8 in view of unsealing properties. Further, the cut line 10 may be partially provided with a non-cut that does not penetrate the base 5 to form a pawl. Although not shown, for example, contents such as confectionery such as rice crackers and biscuits, which are rich in hygroscopicity, are surrounded by the side edge thermal bonding part 6, the partition thermal bonding part 8, and the lower edge thermal bonding part 7 '. Is contained in a designated area.

  The bent portion 9 of the partition wall thermal bonding portion 8 has a straight portion 9a having a predetermined length parallel to the upper edge thermal bonding portion 7, and one or a plurality of linear portions 9a projecting toward the upper edge thermal bonding portion 7 side. A mountain-shaped seal portion 9b having a protruding portion is provided. By adopting such a configuration, when picking the opening knob 11 and opening the easy-open packaging bag 1, the pulling force required at the initial stage of opening can be reduced, and the opening knob 11 is pulled. Can be easily peeled off, and the opening can be smoothly started. Depending on the length of the straight portion 9a of the bent portion 9, one or a plurality of protruding portions of the chevron-shaped seal portion 9b can be provided, and it is preferable to increase the number of protruding portions as the length increases. In addition, although it can open even if it does not provide the mountain-shaped seal | sticker part 9b, since the opening start can be performed smoothly, providing is preferable. Moreover, without providing the linear part 9a in the bending part 9, shapes, such as a mountain shape, a round shape, and a protrusion shape, may be sufficient, for example, and it is not limited to the shape of description.

  Next, the laminated structure of the base | substrate 5 which comprises the easy-open packaging bag 1 is demonstrated. As shown in FIG. 2, the structure of the substrate 5 is based on chemical protection functions (gas barrier properties, moisture permeability, etc.) and physical protection functions (tensile strength, impact strength, etc.) required for the contents to be stored. Base layer 2 / printing layer (not shown) / intermediate layer 3 / inner layer 4 or base material layer 2 / printing layer (not shown) / inner layer 4 can be appropriately designed as a basic configuration. The base material layer 2 is made of a biaxially stretched plastic film such as nylon, polyethylene terephthalate, or polypropylene, a film in which such a film is coated with a barrier material such as polyvinyl alcohol or vinylidene chloride, and an inorganic material such as silicon oxide or aluminum oxide. A vapor deposited film is used. Although not shown, the printing layer is provided by, for example, gravure printing on the surface of the base material layer 2 facing the intermediate layer 3. Further, the thickness of the film constituting the base material layer 2 may be a thickness that can be kept to the minimum necessary for printability, strength, rigidity, etc., and may be determined in consideration of the cost, etc. 40 μm.

For the intermediate layer 3, a barrier film such as ethylene vinyl alcohol, a film on which a metal such as aluminum foil or aluminum is deposited, and a film used for the base material layer 2 are used. For the inner layer 4, polyethylene, ethylene / vinyl acetate copolymer, ionomer, polypropylene, or easily peelable heat-adhesive resin (EPR) is used after film or extrusion lamination. In addition, as a method for imparting easy peelability of EPR, a method of forming a multilayer structure in which a thin layer having a weak adhesive force is provided on the surface, a method of expressing easy peelability by a configuration such as blending a resin having low compatibility, etc. These known ones are appropriately employed. Each of the above layers is laminated by a known technique such as a dry lamination method or an extrusion lamination method to form a laminated material. For example, as a specific example of the laminated structure of the substrate 5, the following structure can be given.
(1) OPP / DL / PET / DL / PEF, EVA or ionomer (2) PET / DL / EPR
(3) PET / DL / ON / DL / PEF
(4) OPP / DL / PEF or CPP
(5) ON / DL / PEF
The abbreviations used in the description of the configuration examples are as follows. OPP: biaxially stretched polypropylene film, PET: biaxially stretched polyester film, PEF: polyethylene film, EVA: ethylene / vinyl acetate copolymer, CPP: unstretched polypropylene film, DL: dry laminate adhesive.

  The structure of the opening part of the easy-open packaging bag 1 of this invention is demonstrated in detail using FIG. 1, FIG. FIG. 3 is an enlarged view in the circle of FIG. 1 and shows the structure of the opening portion. The opening cut line 12 provided on the base 5 is composed of intermittent cuts 13, the cut line 13 extending in a direction parallel to the partition wall heat bonding part 8, and an opening knob for the straight line part 13 a. 11 is formed of a hatched portion 13b extending obliquely at an obtuse angle with respect to the linear portion 13a from the rear end side toward the side edge thermal bonding portion 6 from the rear end side, and the tip 13h of the first cut 131 is a pick for opening. It is formed so as to be connected to both ends of the cut line 10 of the portion 11, and is opened along the cut line 12 for opening from the opening knob 11. The rear end 13t of the first cut 131 of the opening cut line 12 and the tip 13h of the straight portion 13a of the second cut 132 may coincide with each other or be at least overlapped with each other. preferable. By doing so, when the opening knob 11 is pulled to open the base body 5, the base body 5 is torn from the rear end 13 t of the first cut 131 and connected to the second cut 132, and the second cut 132. Thus, the tearing direction is guided to the next third cut 133, and can be prevented from being unsealable by coming off from the opening cut line 12 in a similar and repeated manner along the opening cut line 12. Can be opened. Moreover, the cut line 10 and the opening cut line 12 of the opening knob 11 are provided at the outer edge of the partition heat bonding part 8, and the inside of the easy-open packaging bag 1 has a side edge with the partition heat bonding part 8. Since it is sealed by the edge heat bonding part 6 and the lower edge heat bonding part 7 ', barrier properties and moisture resistance are secured, and moisture absorption prevention of the contents accommodated in the bag can be achieved. In addition, the code | symbol of the 1st cut | interruption 131, the 2nd cut | interruption 132, and the 3rd cut | interruption 133 is attached on description, and the cut | disconnection 13 and a shape and a function are the same.

  Next, the manufacturing method of the base | substrate 5 is demonstrated. First, a printed pattern is back printed on the surface of the base material layer 2 facing the intermediate layer 3 by a gravure printing method. Thereafter, the intermediate layer 3 and the inner layer 4 are sequentially laminated by a dry lamination method or an extrusion lamination method, whereby the winding of the substrate is manufactured. Next, while unwinding the winding of the substrate obtained in the punching step, the cut line 10 and the cut 13 are penetrated to the base material layer 2, the intermediate layer 3 and the inner layer 4 at predetermined positions according to the printing register, for example, The base 5 is manufactured by using a rotary die cutter, provided with a picking part 11 for opening and a cut line 12 for opening. The printed pattern may be provided on the surface of the intermediate layer 3 facing the base material layer 2 or the surface facing the inner layer 4.

  After the substrate 5 manufactured as described above is cut into a predetermined width and wound up, the content is filled and sealed with a content filling machine, whereby the easy-open packaging bag 1 is manufactured. Moreover, after winding said base | substrate 5 into a four-sided seal bag with a bag making machine, you may fill with the content with a filling machine. In addition, for example, a rotary die cutter may be mounted on the filling machine, and the opening 5 may be provided with the opening knob 11 and the opening cut line 12 before filling the contents while rewinding the substrate 5.

  Next, the opening method of the easy-open packaging bag 1 of this invention is demonstrated using FIG. The opening knob 11 provided on the base 5 of the easy-open packaging bag 1 is picked with one finger, the vicinity of the opening knob 11 of the upper edge thermal bonding part 7 is picked with the other finger, and the opening knob When the body 5 is opened toward the lower edge thermal bonding portion 7 ′ while pulling 11 upward, the base 5 is torn from the rear end 13 t of the first cut 131 connected to the cut line 10 and reaches the second cut 132. The opening direction is guided along the second cut line 132, and the same is repeated in sequence, the base 5 is torn along the opening cut line 12 to form the tear piece 14, and the opening 15 and the content An object (not shown) appears. When the opening cut line 12 reaches the side edge thermal bonding portion 6 and the tear piece 14 is further pulled, it peels between the opposing inner layers 4 along the side edge thermal bonding portion 6 to form a wide opening 15. Thus, the contents can be easily taken out. In addition, the substantially U-shaped partition wall thermal bonding portion 8 (the hatched portion indicates a peeling mark) is also peeled between the inner layers 4 like the side edge thermal bonding portion 6 and can be opened. With such a structure, a wide opening can be formed, the contents can be easily taken out, and the contents can be taken out without soiling the back and palm of the hand even if the contents are reduced.

  FIG. 5 is a plan view showing a second embodiment of the easy-open packaging bag according to the present invention, and FIG. 6 is a cross-sectional view taken along line YY of FIG. The easy-open packaging bag 21 of the present invention comprises a front side sheet 22, a back side sheet 23 and a bottom sheet 24 provided with a base material layer 2, an intermediate layer 3, and an inner layer 4 made of a heat adhesive resin. The front side sheet 22 and the back side sheet 23 are arranged so that the four inner layers face each other, and a bottom sheet 24 that is mountain-folded at the center with the inner layer 4 side being outside is inserted between the lower parts of the front and back sides. The inner layers 4 and 4 of the sheets 22 and 23 and the peripheral edge between the inner layers 4 of the bottom folded sheet 24 facing each other are thermally bonded to form a bottom portion 25, and the front and back side sheets 22 and 23 are opposed to each other. This is a self-supporting easy-open packaging bag having a side edge thermal bonding portion 26 on both ends of the set and an upper edge thermal bonding portion 27 on the edge opposite to the bottom 25. The peripheral edge of the bottom 25 formed by thermally bonding the peripheral edges refers to the lower edge thermal adhesive portion 27 ′ at the lower end and the side edge thermal adhesive portions at both ends. It is shared with the thermal bonding part 26. A notch A of the substantially semicircular bottom sheet 24 is provided in the vicinity of the lower ends of both sides of the bottom sheet 24 folded in the center. In the notch A, the four inner layers of the front and back side sheets 22 and 23 face each other. Is directly heat bonded.

  A substantially U-shaped partition wall thermal adhesive portion having a bent portion that is thermally bonded so as to be peelable across the side edge thermal adhesive portion 26 with respect to the lower edge thermal adhesive portion 27 ′ provided on the lower edge of the bottom portion 25. 28, the bent portion 29 of the partition wall heat bonding portion 28 has a straight portion 29 a having a predetermined length parallel to the lower end edge heat bonding portion 27 ′ of the bottom portion 25, and the lower end edge heat of the bottom portion 25 of the bent portion 29. A bend portion 29 is surrounded by the adhesive portion 27 ′ side region, and a cut line 30 is formed on one or both of the front and back side sheets 22 and 23 so as to penetrate the front and back side sheets 22 and 23, and an opening knob 31 is provided. In addition, either one or both of the front and back side sheets 22 and 23 from both ends of the cut line 30 of the opening knob 31 to the unsealed portion of the partition wall heat-bonding portion 28 or its outer edge along the partition heat-bonding portion 28 Open through front and back side sheets 22 and 23 Use cut line 32 is provided. Although not shown, for example, contents such as rice crackers and biscuits that are highly hygroscopic, such as confectionery, are surrounded by a side edge thermal adhesive portion 26, a partition thermal adhesive portion 28, and an upper edge thermal adhesive portion 27. Is housed in the area. Further, the bent portion 29 of the partition wall heat bonding portion 28 is provided with a mountain-shaped seal portion 29b having one or a plurality of protruding portions protruding toward the lower end edge heat bonding portion 27 'side. With such a configuration, when picking the opening knob 31 and opening the easy-open packaging bag 21, it is possible to reduce the tensile force required at the initial stage of opening and pulling the opening knob 31. Thus, it can be easily peeled off from the bottom 25, and the opening can be started smoothly.

  The laminated structure of the front and back side sheets 22 and 23 and the bottom sheet 24 constituting the easy-open packaging bag 21 of the present invention and the structure of the opening part are the same as in the first embodiment, and the description thereof is omitted.

  Next, the manufacturing method of the easily openable packaging bag 21 is demonstrated. The front and back side sheets 22 and 23 and the bottom sheet 24 are printed on the surface of the base material layer 2 facing the intermediate layer 3 by a gravure printing method. Thereafter, the intermediate layer 3 and the inner layer 4 are sequentially laminated by a dry lamination method or an extrusion lamination method to produce a winding. The bottom sheet 24 is not normally printed, but can be provided according to customer requirements. Next, while unwinding the winding of the front and back side sheets 22 and 23 with a known standing pouch bag making machine, the base line 2, the intermediate layer 3, the cut line 30 and the cut 13 at predetermined positions according to the printing register. For example, it is formed using a rotary die cutter so as to penetrate to the inner layer 4, and is provided with an opening knob 31 and an opening cut line 32, and thereafter, the inner layer 4 surfaces of the front side sheet 22 and the back side sheet 23 are connected to each other. It is arranged so as to face each other, and a substantially semi-circular cutout is provided at a predetermined position of the bottom sheet 24 that is mountain-folded at the center with the inner layer 4 face outside between the lower parts of the front and back side sheets 22, 23. While the inner layers 4 and 4 of the front and back side sheets 22 and 23 and the peripheral edge between the inner layers 4 of the bottom folded sheet 24 facing each other are thermally bonded, a bottom 25 is formed and the front and back side sheets 22 and 23 are opposed to each other. Do Both ends of the set are thermally bonded to provide side edge thermal bonding portions 26, and the inner layer 4 surfaces of the front and back side sheets 22 and 23 are directly heat bonded to each other at the notches, and the upper edge thermal bonding portion 27 is not yet bonded. A self-adhesive easy-open packaging bag is produced. Thereafter, the contents are filled from above with a filling machine for the contents, and the upper edge thermal bonding portion 27 is thermally bonded and sealed, whereby the easy-open packaging bag 21 is manufactured.

  Further, for example, a rotary die cutter is mounted on the filling machine, and the opening knob 11 and the opening cut line 12 are provided on one or both of the front and back side sheets 22 and 23 while rewinding the front and back side sheets 22 and 23. Thereafter, the contents can be filled.

  Moreover, although the opening picking part 11 and the opening cut line 12 can be provided on either one or both of the front and back side sheets 22 and 23, the opening side of the easily openable packaging bag 21 is provided on both. This is preferable because there is no need to make a selection and convenience is improved. The unsealing method is the same as in the first embodiment, and a description thereof is omitted.

  FIG. 7 is a plan view showing a third embodiment of the easy-open packaging bag according to the present invention. As shown in FIG. 7, the easy-open packaging bag 31 includes a bent portion of the partition thermal bonding portion, an opening cut line, a cut line forming an opening knob, and an edge thermal bond including the opening knob. Unlike the configuration of the first embodiment, the region surrounded by the portion, the side edge thermal bonding portion of the two sides and the partition thermal bonding portion is the same. The bent portion 39 of the substantially U-shaped partition wall thermal bonding portion 38 is provided with two throat-shaped seal portions 39c protruding toward the opposite edge thermal bonding portion 37, and between the throat-shaped seal portions 39c. A curved seal portion 39d that is curved in a concave shape is provided on the edge thermal bonding portion 37 side. With such a configuration, it is possible to further reduce the tensile force required at the initial stage of opening, and to smoothly start opening by pulling the opening knob 11. It suffices that at least one of the shed-like seal portions 39c is provided, and may be arbitrarily set depending on the size of the opening knob. The curved seal portion 39d may be linear, but the curved seal portion is preferable because the peel strength at the time of opening does not increase rapidly and can be opened smoothly.

  Further, the opening cut line 312 is formed by a half cut that does not penetrate the base body 5, and the partition heat bonding part is formed from the vicinity of both ends of the cut line 310 of the opening knob 11 to the partition heat bonding part 38 or an unsealed part around the outer edge thereof. 38 is provided on the base body 5. Furthermore, a tip 312h on the opening knob 11 side of the opening cut line 312 made of a half cut is formed in a U shape. Since the tip 312h on the side of the opening knob 11 is formed in a U shape, the base body 5 is torn from both ends of the cut line 310 of the opening knob 11 when opened from the opening knob 11, and the tearing is performed. When the direction is guided by the opening cut line 312, it is possible to prevent the base body 5 from tearing from the tip 312 h of the opening cut line 312 and deviating from the opening cut line 312.

  Further, projecting seal portions S and S surrounding the opening knob 11 are provided on the side of the opening knob 11 from the edge thermal bonding portion 37 facing the opening knob 11. Furthermore, a substantially rectangular point seal portion P is provided in an unsealed region R surrounded by the edge thermal bonding portion 37, the side edge thermal bonding portions 6 and 6, the partition wall thermal bonding portion 38, and the protruding seal portion S. . By providing the projecting seal portions S and S in this way, it is possible to reduce the entry of foreign matter from the cut line 310 of the opening knob 11 into the unsealed region R, and further to the point seal portion in the unsealed region R. By adopting a configuration in which P is provided, it is possible to further reduce the entry of foreign matter from the cut line 310 of the opening knob 11 into the unsealed region R. In the third embodiment, two point seal portions P are provided in each of the unsealed regions R and R, and the side edge thermal bonding portions 6 on both side edges are bonded to the upper end edge thermal bonding. It was made long in the direction of the lower edge thermal bonding part 7 ′ at a position facing the part 37. The number, size, shape, and the like of the point seal portion P are not limited to those in the third embodiment, and may be arbitrarily set depending on the size and shape of the unsealed region R.

  FIG. 8 is a plan view showing a fourth embodiment of the easy-open packaging bag according to the present invention. As shown in FIG. 8, the easy-open packaging bag 41 includes an edge thermal bonding including a bent portion of the partition heat-bonding portion, an opening cut line, a cut line forming an opening knob, and an opening knob. Unlike the configuration of the first embodiment, the region surrounded by the portion, the side edge thermal bonding portion of the two sides and the partition thermal bonding portion is the same. Further, the easy-open packaging bag 41 is different from the third embodiment in the configuration of the opening cut line 412 and the others are the same. The opening cut line 412 of the easy-open packaging bag 41 extends from the vicinity of both ends of the cut line 310 of the opening knob 11 to the partition heat bonding part 38 or the unsealed part around the outer edge along the partition heat bonding part 38. The base 5 is provided. The opening cut line 412 is the same as the opening cut line 12 of the first embodiment except that the opening cut line 412 is composed of an intermittent cut 13 having a straight line portion 13a and a hatched portion 13b, and the configuration of the first cut 131 is different. The different parts will be described. A straight end 131'h of the first cut 131 'is formed in a U shape. With this configuration, the base 5 is torn from both ends of the cut line 310 of the opening knob 11 when opened from the opening knob 11, and the tear direction is guided to the opening cut line 412. In some cases, it is possible to prevent the base body 5 from tearing from the tip 131′h of the straight portion of the first cut 131 ′ and deviating from the opening cut line 412.

  Next, the present invention will be described in more detail with reference to the following examples.

  Predetermined printing is performed with a polyurethane-based ink on a 12 μm-thick biaxially stretched polyethylene terephthalate film (PET) by a gravure printing method, and a 15 μm-thick biaxially stretched nylon is applied to the printed surface via a polyester polyol-isocyanate adhesive. Dry lamination is performed on the corona-treated surface of an EPR film (manufactured by Tosero Chemical Co., Ltd., CMPS013C) having a film (ON) laminated by a dry lamination method and further subjected to a 30 μm-thick corona treatment on the ON surface via the adhesive. Then, the substrate 5 was laminated and cured at 40 ° C. for 2 days to prepare a winding of the substrate 5.

  The base 5 is wound by a bag making machine equipped with a punching die having a cutting blade and a face plate, and the side edge thermal bonding part 6 is 7 mm wide, the upper edge thermal bonding part 7 is 7 mm wide, Bulkhead thermal bonding provided with a chevron-shaped seal portion 9b provided with five protruding portions protruding 2.5 mm on the upper edge thermal bonding portion 7 side and a bent portion 9 having a straight portion 9a having a length of 30 mm at a substantially central portion. A four-side-seal type easy-open packaging bag 1 in which the portion 8 has a width of 7 mm and the lower edge thermal bonding portion 7 ′ having an outer dimension of 170 mm × 135 mm is not formed. Further, a cut line 10 having a length of 30 mm and a width of 10 mm is formed in a substantially U shape surrounding the bent part 9 of the easy-open packaging bag of the four-side seal type, and a picking part 11 for opening is provided, and a straight part 5 mm and a hatched part The opening cut line 12 formed at a position where the rear end of the cut and the front end of the next cut coincide with each other in the opening direction is provided.

  Predetermined printing is performed on the corona-treated surface of a biaxially stretched polypropylene film (OPP) having a thickness of 20 μm with a polyurethane-based ink by a gravure printing method, and a polyester polyol-isocyanate-based adhesive is applied to the printed surface. EPR which was laminated by dry lamination method with aluminum vapor deposition surface of biaxially stretched polyethylene terephthalate film (PET) with single-sided aluminum vapor deposition of 12μm thickness, and further 30μm thick single-sided corona treatment via PET on the PET surface. A corona-treated surface of a film (manufactured by Tosero Chemical Co., Ltd., CMPS013C) was laminated by a dry lamination method and cured at 40 ° C. for 2 days to prepare a winding used for front and back side sheets.

  A biaxially stretched polyethylene terephthalate film (PET) having a thickness of 12 μm is dry-laminated on a corona-treated surface of a biaxially stretched polypropylene film (OPP) having a thickness of 20 μm and subjected to corona treatment on a single side via a polyester polyol-isocyanate adhesive. And a corona-treated surface of an EPR film (manufactured by Tosero Chemical Co., Ltd., CMPS013C) with a thickness of 30 μm on the PET surface via the adhesive, and laminated by a dry lamination method, Curing was carried out for 2 days to prepare a winding used for the bottom sheet.

  Using the winding described above, the vertical and horizontal dimensions are 170 mm × 135 mm, the bottom folding dimension is 33 mm, the side edge thermal adhesive portion 26 and the lower edge thermal adhesive portion 27 ′ have a seal width of 7 mm, and the straight portion 29 a of the bent portion 29. The seal width of the substantially U-shaped partition wall thermal bonding portion 28 having a bent portion extending from the position of 7 mm from the lower end of the bottom portion to the intersection of the mountain fold portion of the bottom sheet 24 and the side edge thermal bonding portion 26. A self-supporting easy-open packaging bag is made as 7 mm, and a cut line of the opening knob is formed at a position 10 mm from the lower end of the bottom portion 25 of the self-supporting easy-open packaging bag, for opening 40 mm × 7 mm in length. A knob is provided, and the straight edge 5 mm, the hatched part 2.5 mm, and the cut of the angle 135 ° formed by the straight line part and the hatched part are positioned so that the rear end of the cut and the front end of the next cut coincide with the opening direction. Forming and opening cut line Only to produce a easy-open packaging bag 21. In addition, the mountain-shaped seal portion 29b of the bent portion 29 has five protruding portions that protrude 2.5 mm toward the lower edge thermal bonding portion 27 'side.

  Using the winding of the substrate 5 of Example 1, bags are made by a bag making machine equipped with a punching die provided with a cutting blade and a face plate, and an easy-open packaging bag of the same size as that of Example 1 31 was produced. However, the bent portion 39 of the substantially U-shaped partition wall thermal bonding portion 38 is provided with two hook-shaped seal portions 39c protruding 3.5 mm toward the edge thermal bonding portion 37, and the distance between them is 20 mm. A curved seal portion 39d is formed, and two point seal portions P are provided in each of the unsealed regions R and R, and the opening cut line is formed by a half cut near both ends of the cut line of the opening knob. The tip was formed in a U shape. The opening cut line consisting of a half cut was provided on the substrate 5 so as to penetrate the EPR film and the ON film from the EPR film surface to reach the PET film. Further, a substantially U-shaped cut line 310 surrounding the bent portion 39 was formed, and the opening knob 11 was provided.

Using the lid material of Example 1, the same opening knob and cut line as in Example 1 were provided to produce a lid. However, after that, using the container main body of Example 1, the cut line of the opening knob is provided in the same manner as in Example 1, and the lid body and the container main body are peeled off at the first heat bonding part and the second heat bonding part. A flexible soft type easy-open packaging bag 41 was produced by heat bonding. The mouth-opening seal portion 39c and the point seal portion P have the same configuration as in the third embodiment.
Using the winding of the substrate 5 of Example 1, bags are made by a bag making machine equipped with a punching die provided with a cutting blade and a face plate, and an easy-open packaging bag of the same size as that of Example 1 41 was produced. The configuration and dimensions of the opening cut line were the same as those in Example 1, and the tip 131′h of the straight part of the first cut 131 ′ was formed in a U shape. The cut line of the opening knob, the lip-shaped seal portion of the bent portion, the curved seal portion, and the point seal portion have the same configuration and dimensions as in Example 3.

  The easy-open packaging bags of Examples 1 to 4 prepared above were filled with 50 g of potato chips and sealed with the lower edge thermal adhesive portion 7 ′ and the upper edge thermal adhesive portion 27.

  Then, when each easy-open packaging bag was opened from the picking part for opening, the four-side seal type easy-open packaging bags of Examples 1, 3, and 4 were thermally bonded to the partition wall along the opening cut line. It was peeled off at the edge and the side edge thermal bonding part, and it could be opened and the contents could be taken out. The easy-open packaging bag of Example 3 had a beautiful opening cut line after opening. In the self-supporting easily openable packaging bag of Example 2, the front side sheet and the bottom sheet are peeled off at the partition wall heat bonding portion along the opening cut line, and the front side sheet is further peeled off at the side edge heat bonding portion. The back side sheet was peeled off and opened, and the contents could be taken out. A wide opening was formed in each of Examples 1 to 4, and the contents could be easily taken out without soiling the fingers even when the contents were reduced.

It is a top view which shows 1st embodiment of the easily openable packaging bag concerning this invention. It is the XX sectional view taken on the line of FIG. It is an enlarged view which shows the cut line and cut in the circle | round | yen of FIG. It is a perspective view which shows the state in the middle of opening of an easily openable packaging bag. It is a top view which shows 2nd embodiment of the easy-open packaging bag concerning this invention. FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. It is a top view which shows 3rd embodiment of the easily openable packaging bag concerning this invention. It is a top view which shows 4th embodiment of the easily openable packaging bag concerning this invention.

Explanation of symbols

1, 21, 31, 41 Easy-open packaging bag 2 Base layer 3 Intermediate layer 4 Inner layer 5 Substrate 6, 26 Side edge thermal bonding part 7, 27, 37 Upper edge thermal bonding part 7 ', 27' Lower edge thermal Bonding part 8, 28, 38 Bulkhead thermal bonding part 9, 29, 39 Bending part 9a, 29a Straight line part 9b, 29b Angle seal part 10, 30, 310 Cut line 11, 31 Opening knob 12, 32, 312, 412 Opening line 13 Line 13a Straight line 13b Diagonal line 13h Cutting edge 13t Rear edge 131, 131 'First line 132 Second line 133 Third line 14 Tear piece 15 Opening 22 Front side sheet 23 Back side sheet 24 Bottom sheet 25 Bottom part 39c Mouth-shaped seal part 39d Curved seal part 131'h Tip of first cut 312h Open cut line Tip A notch P point seal portion R unsealed region S projecting seal portion

Claims (11)

A rectangular substrate having at least a base material layer and an inner layer made of a heat-adhesive resin, the inner layers are opposed to each other, and a side edge thermal bonding portion and a side edge heat are formed on a pair of opposite ends. A substantially U-shaped partition wall thermal bond having an edge thermal bonding portion at one edge orthogonal to the bonding portion and having a bent portion across the side edge thermal bonding portion with respect to the edge thermal bonding portion side A packaging bag that is thermally bonded in a peelable manner at the side edge thermal bonding portion and the partition thermal bonding portion, and encloses the bending portion in the edge thermal bonding portion side region of the bending portion. In addition, a tear line penetrating the base constituting the one surface is formed, and an opening knob is provided, and the partition heat-bonding part or the periphery of the outer periphery from both ends of the opening knob or the vicinity thereof The unsealed portion penetrates the base body constituting one surface along the partition heat-bonding portion. Opening for cut lines are provided to, easy-open packaging bag, which comprises opening along the opening for cut lines from the opening knob portion. It consists of a base layer and a front side sheet, at least a back side sheet and a bottom sheet provided with an inner layer made of a heat-adhesive resin, and the inner side surfaces of the front side sheet and the back side sheet are arranged to face each other, Inserting the bottom sheet folded in the center with the inner layer surface outside between the lower portions of the sheet, and the periphery between the inner layer surface of the front and back side sheets and the outer surface of the mountain folded bottom sheet facing them A self-supporting packaging comprising a pair of opposite end edges of the front and back side sheets and a side edge thermal adhesive portion and an edge thermal adhesive portion facing the bottom portion. In the bag, the bottom is provided with a substantially U-shaped partition wall thermal bonding portion having a bent portion that is thermally bonded so as to be peelable across the side edge thermal bonding portion with respect to the lower end side of the bottom portion, and the bending The bent portion in the bottom lower end side region of the portion A cut line that penetrates the front and back side sheets is formed on either one or both of the front and back side sheets, and an opening knob is provided, and from both ends or the vicinity of the cut line of the opening knob The unsealed portion of the partition wall thermal bonding portion or the outer periphery thereof is provided with a tear line for opening that penetrates the front and back side sheet on either one or both of the front and back side sheets along the partition thermal bonding portion. An easy-open packaging bag, which is opened along the opening cut line from a picking portion. The easily openable packaging bag according to claim 1 or 2, wherein the opening cut line is a half cut that does not penetrate the base body. The opening cut line consists of intermittent cuts, and the cut line extends from the rear end side with respect to the straight part extending in a direction parallel to the partition heat-bonding part and the opening knob part of the straight part. It consists of a slanted line part extending obliquely at an obtuse angle with respect to the linear part toward the side edge thermal bonding part, and the tip of the first cut is connected to both ends of the cut line of the opening knob The easily openable packaging bag according to claim 1 or 2, wherein the easily openable packaging bag is formed in the vicinity thereof. The bent portion of the substantially heat-bonded partition wall thermal bonding portion has a straight portion of a predetermined length parallel to the edge thermal bonding portion or the bottom lower end, and the edge thermal bonding portion side is in the linear portion 5. The easy-open packaging bag according to any one of claims 1 to 4, further comprising a mountain-shaped seal portion having one or a plurality of protruding portions protruding toward the bottom lower end side. 2. The bent portion of the substantially U-shaped partition wall thermal bonding portion is provided with at least one lip-shaped seal portion protruding toward the edge thermal bonding portion side or the bottom lower end side. The easily openable packaging bag in any one of -4. The rear end of the cut of the opening cut line and the front end of the straight line of the next cut coincide with or at least overlap with the opening direction. The easy-open packaging bag according to any one of the above. The easy-open packaging according to any one of claims 3, 5 and 6, wherein a tip of the unsealing cut line formed of the half cut is formed in a U-shape. bag. The easily openable packaging bag according to any one of claims 4 to 7, wherein a tip of the straight portion of the first cut forming the opening cut line is formed in a U shape. The protruding seal portion surrounding the opening knob is provided from the edge thermal bonding portion facing the opening knob or the lower edge thermal bonding portion formed at the lower end of the bottom portion. The easily openable packaging bag according to any one of 9 above. The unsealed region surrounded by the edge thermal bonding portion, the side edge thermal bonding portion, the partition thermal bonding portion, and the protruding seal portion, or the lower edge thermal bonding portion and the side edge forming the bottom portion The easy-open packaging according to any one of claims 1 to 10, wherein a point seal portion is provided in an unsealed region surrounded by an edge heat bond portion, the partition heat bond portion, and the protruding seal portion. bag.

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