JP2016117526A - Gusset packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gusset packaging bag, which can be opened with a neat open shape, and can be used as a container without transferring a packed object to other bag.SOLUTION: A gusset packaging bag comprises: a bottom face film on which a folding is formed and which serves as a bottom face part; a pair of facing side face films which are respectively coupled to both end edges of the bottom face film; and an upper face film 10d coupled to respective upper end edges of the side face films, in which a cylindrical body whose both ends are opened, is formed, one opening 10e is heat deposited in advance, and the other opening 10f is heat deposited after filling a packed object in the gusset packaging bag. The upper face film 10d has open cut lines 11 (11A) on both end edges thereof, and is heat deposited at end edges of the side face films, and a notch 15 is formed on a heat deposition position of one opening 10e.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a gusset packaging bag, and more particularly, to a gusset packaging bag that is self-supporting by packing a packaged item and can be easily opened, and can be used as a container without being transferred to another after opening. .

  In recent years, microwave ovens have rapidly developed and become popular, and are now one of the necessities in ordinary households. Along with this spread, a wide variety of processed foods for microwave ovens have been developed and commercialized, and are distributed and sold in large quantities in the market. Most of these processed foods are packaged in packaging bags of a predetermined shape, and these packaging bags are devised to be compatible with each processed food.

For example, Patent Document 1 below describes two packaging bags. Each of these packaging bags can be easily taken out by forming a notch for tearing in the back seal portion or the like and tearing and opening the notch portion.
One packaging bag is provided with a cut in the direction perpendicular to the length direction of the back seal portion in the vicinity of the upper and lower ends of the back seal portion. According to this packaging bag, it is possible to tear the bag body from side to side in the wake of the cut, open the bag body to the left and right, and use the opened bag body as a tray when eating.

  Moreover, the other packaging bag forms the half cut line extended in parallel with a back seal part in the left-right both ends vicinity of a bag body back surface. This half-cut line is a cut of only a part in the thickness direction of the film, that is, only the base material layer or the base material layer and the intermediate layer are penetrated. According to this packaging bag, in the vicinity of the upper end portion of the packaging bag, the bag body can be torn to the left and right triggered by the cut, and then torn longitudinally along the half cut line.

  Patent Document 2 below describes a package that can be self-supported by packaging of an article to be packaged and heated in this state in a microwave oven. Specifically, the package body is inserted into the bottom portion of the front surface and the rear surface formed of a quadrangle that constitutes the body portion by folding the bottom surface in an inverted V shape, leaving the top seal portion, and the front surface and the rear surface. In addition, the peripheral portion of the bottom surface is heat-sealed to form a body seal portion and a bottom seal portion, and after filling with an article to be packaged, the top seal portion is further heat-sealed. With this configuration, the bottom portion expands back and forth with the filled article to be packed, and the self-supporting package body can be formed in a self-supporting form.

JP 2008-081191 A JP 2006-321493 A

  However, of the two packaging bags described in Patent Document 1, one of the packaging bags requires a strong tearing force when tearing left and right. There is a risk of the packaged items popping out. For this reason, if the article to be packaged contains a liquid, the liquid flows out to contaminate the periphery, and if it is heated in a microwave oven, there is a risk of being burned by hot water. Also, it is difficult to open along the assumed half-cut line even if it tears from the cut of the back seal part to the left and right, and it becomes easy to form a random opening, so when using it as a tray, the opening edge is There are problems such as being straight and not being torn cleanly and having an unpleasant shape, poor appearance and lack of design.

On the other hand, since the other packaging bag has a half cut line formed in the vicinity of both ends of the bag body, it looks like it is not torn to the edges of both ends like the above-mentioned packaging bag. However, as a result of the experiment, it is similarly difficult to open along the half-cut line, and if it is torn to the left and right, it will be torn to the edges of both ends of the bag body beyond the half-cut line. There are challenges. In addition, since the half-cut line is provided on the film surface that wraps the packaged item, the mechanical strength of this part is reduced compared to other parts, and the bag body during transportation or heating in a microwave oven. May be broken and the packaged items may jump out. Since these two packaging bags are both shallow, if the bag body is torn, the packaged items will jump out to the outside. Especially when used in a microwave oven, the packaged items popped out, for example, burns by hot water, etc. There is a risk.
Moreover, since the packaging body described in the said patent document 2 is deep bottom compared with the said packaging bag, the subject of the shallow bottom which the said packaging bag has is eliminated, but the subject which cannot open the opening shape neatly Is latent.

  The present invention has been made to solve the above-described problems of the prior art. That is, an object of the present invention is to provide a gusset packaging bag that can be opened with a beautiful opening shape and can be used as a container as it is without being transferred to another object after opening.

  Another object of the present invention is to be self-supporting by packaging the packaged item, and in this state, the packaged item can be heated, and after heating, it can be opened with a clean opening shape, and the packaged item is opened after opening. An object of the present invention is to provide a gusset packaging bag that can be used as a container as it is without transferring an object to another.

  Another object of the present invention is to provide a gusset packaging bag that can be easily made by an automatic packaging machine.

  In order to solve the above-mentioned problem, the gusset packaging bag according to the first aspect of the present invention includes a bottom film that is folded and serves as a bottom surface portion, and a pair of opposite side films that are respectively connected to both end edges of the bottom film, A cylindrical body having both ends opened with the upper film connected to the upper edge of each of the side films is formed, one opening is heat-sealed in advance, and the other opening is heated after the package is packed. In the gusset packaging bag in which the packaged object is packaged by welding, the upper surface film is provided with an opening cut line at each end edge and is thermally welded at the end edge of the side film, and either one of the openings is opened. A cut is formed at the heat-welded portion.

  The gusset packaging bag according to the second aspect is the gusset packaging bag according to the first aspect, wherein the opening cut line includes a continuous or non-continuous groove, a penetrating or non-penetrating hole in the upper surface film surface at a predetermined interval. It is characterized by being formed of any one of a plurality arranged in a shape.

  A gusset packaging bag according to a third aspect is the gusset packaging bag according to the first aspect, wherein the opening cut line is formed by a recessed groove having a predetermined width, length and depth in the upper surface film. Features.

  The gusset packaging bag according to a fourth aspect is the gusset packaging bag according to any one of the first to third aspects, wherein the top film has a smaller area than the bottom film.

  The gusset packaging bag of the fifth aspect is the gusset packaging bag of any one of the first to fourth aspects, wherein the bottom film, the side film, and the top film are made of a single plastic film. Features.

  The gusset packaging bag according to a sixth aspect is the gusset packaging bag according to the fifth aspect, wherein the plastic film is a laminated film in which at least a base material layer and an easily peelable sealant layer are laminated.

  A gusset packaging bag according to a seventh aspect is characterized in that, in the gusset packaging bag according to the sixth aspect, the heat-sealing seal of the opening is welded with higher strength than the heat-sealing of other portions.

  According to the gusset packaging bag of the first aspect of the present invention, the upper portion of the bag body can be easily opened with a clean opening shape, and after opening, the packaged item is not transferred to another, and it looks good as it is. Can be used as a deep bottom container.

  According to the gusset packaging bag of the second aspect, the opening cut line is formed by arranging a plurality of continuous or non-continuous grooves and through or non-through holes linearly at predetermined intervals on the upper film surface. Therefore, it can be opened with a beautiful opening shape along these cut lines. In addition, these continuous or non-continuous grooves, and through or non-through holes may have mechanical strength lowered even if a film provided with holes or the like is sealed by being bonded and thermally welded to other films. Absent. As a result, the packaging bag is safe from the outside through the opening cut line during distribution and storage, so that no bacteria enter the packaging bag from the outside, it is hygienic, and there is no tearing or rupture of the packaging bag during transportation. Excellent in properties.

  According to the gusset packaging bag of the third aspect, since the unsealing cut line is formed by a recessed groove having a predetermined width, length and depth, even if the internal pressure of the packaging bag increases during microwave heating. It can be used safely and safely for microwave ovens without being ruptured and released from the groove. Also, after heating in a microwave oven, it can be opened with a clean opening shape, and there is no risk of contaminating the surroundings or burning your hands when opening, and without moving the package to another container. Can be used.

  According to the gusset packaging bag of the fourth aspect, the top film has a narrower and smaller area than the bottom film, so that the large-area bottom film is the mounting surface and the small-area top film is the top. A trapezoidal packaging bag is formed. This packaging bag can be made independent in a stable state.

  According to the gusset packaging bag of the fifth aspect, the packaging bag can be easily produced by the automatic packaging machine.

  According to the gusset packaging bag of the sixth aspect, peeling of the opening cut line becomes smooth.

  According to the gusset packaging bag of the seventh aspect, the sealing strength of the opening at both ends of the bag body is high by welding the heat-sealing seal of the opening with higher strength than the heat-welding of other portions. The package is not released to the outside. On the other hand, the heat-welded portions at other places and bent places are easily separated from the film at the time of opening, so that opening is facilitated.

It is a perspective view of the gusset packaging bag which concerns on embodiment of this invention. 2A is a sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is an enlarged view of the IIB portion in FIG. 2A. It is a top view of the plastic packaging material which forms a bag of the gusset packaging bag of FIG. 4 shows the opening cut line of FIG. 3, FIG. 4A is an enlarged view of the IVA portion of FIG. 3, FIG. 4B is a sectional view of IVB-IVB of FIG. 4A, and FIG. FIG. FIG. 5 shows an unsealed state in an unsealing cut line when using a microwave oven, FIG. 5A is a state before unsealing, FIG. 5B is during the unsealing, and FIG. 5C is a cross-sectional view when unsealing. 6 shows an opened state of the gusset packaging bag of FIG. 1, FIG. 6A is a perspective view before opening, and FIG. 6B is a perspective view after opening.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a gusset packaging bag for embodying the technical idea of the present invention, and is not intended to specify the present invention. It is equally applicable to those of other embodiments included in.

  As shown in FIGS. 1 and 2, a gusset packaging bag (hereinafter referred to as a packaging bag) 10 according to an embodiment of the present invention is folded into a bottom film 10a serving as a bottom surface portion, and both end edges of the bottom film. A pair of opposed side films 10b and 10c connected to each other and a top film 10d connected to the upper edge of each of these side films form a cylindrical body having both ends opened, and one opening 10e is heated in advance. The other opening 10f is heat-sealed after the object to be packaged is packed and the object to be packaged is packaged, and the upper surface film 10d is provided with opening cut lines 11 at both end edges, respectively, It is heat-welded to the edge of 10c, and has the structure by which the cut 15 was formed above one opening welding location.

  Hereinafter, the individual films of the top film, the side film, and the top film constituting the packaging bag will be described in detail.

First, as shown in FIG. 1 and FIG. 2, the bottom film 10 a is made of a substantially rectangular film having a predetermined length and a width, and has a longitudinal direction at a substantially central portion along the longitudinal direction. A folded portion (a folded portion is generally referred to as a gusset) 10a 'having a predetermined width and folded in an inverted V shape is provided, and both end edges in the longitudinal direction are thermally welded to the side films 10b and 10c, respectively. ing. These welding locations are the first and second welded portions 10ab ₁ and 10ac.
The bottom film 10a is expanded in the folded portion 10a ′ when an article to be packaged is packed in the packaging bag. As a result, the expanded bottom film 10a has a welded frame 10ab ₁ , 10ac on both sides as a kind of frame frame, a flat bottom surface is formed, and this bottom surface is stably placed on a flat mounting surface. Can be placed.

  The pair of facing side films 10b and 10c are made of a substantially rectangular film having a predetermined width and length and having a larger area than the bottom film 10a. By making the size of each side film 10b, 10c wider than that of the bottom film 10a, these side films become taller when a packaged bag is filled with the objects to be packaged, and a deep packaging bag is formed. Is done.

Of the side films 10b and 10c facing each other, one side film 10b is composed of two side film pieces 10b ₁ and 10b ₂ as shown in FIGS. 1 and 2A. The edges of the two are heat welded with a predetermined width. This welded portion where the palms are held together is the back seal portion 12.

Further, as shown in FIGS. 1 and 2, the upper surface film 10d is made of a substantially rectangular film having a predetermined size and a predetermined length, and has a predetermined width and length at a substantially central portion in the longitudinal direction. A folded portion 10d 'folded in a letter shape is provided, and opening cut lines 11 are provided at both ends in the longitudinal direction, respectively, and are thermally welded to the side films 10b ₂ and 10c. These welding locations are the third and fourth welded portions 10b2d and 10cd. The top film 10d is preferably narrower and has a smaller area than the bottom film 10a. When the area of the top film is narrower and smaller than the bottom film, a substantially trapezoidal packaging bag is formed with the large-area bottom film 10a as the mounting surface and the small-area top film 10d as the top. This packaging bag can be made independent in a stable state.

Opening cut line 11, as shown in Figure 4A, it is formed by those sequences predetermined width, a plurality of slits 11 ₁ consisting of recessed groove length and depth in a row at predetermined intervals. This unsealing cut line 11 will be described with a plastic packaging material 100 for producing a packaging bag to be described later.

  The bottom film 10a, the pair of opposing side films 10b and 10c, and the top film 10d described above are made of a plastic packaging material 100 made of a single plastic film. By using this packaging material, the packaging bag can be easily made by an automatic packaging machine.

  Hereinafter, the plastic packaging material 100 will be described with reference to FIG. FIG. 3 is a plan view of a plastic packaging material for making gusset packaging bags.

  The plastic packaging material 100 is made of a long plastic film. As this plastic film, a laminated film in which at least a base material layer and an easily peelable sealant layer are laminated is used. The base material layer is a biaxially stretched plastic film such as a biaxially stretched polypropylene film, a biaxially stretched nylon film, or a biaxially stretched polyester film. The easy-peeling sealant layer is a polyolefin resin film of different multilayers. In addition, the easy-cut / easy-open film made of this laminated film is already known as one having excellent straight cut properties, and this known one is used in this embodiment.

Plastic packaging material 100, as shown in FIG. 3, a predetermined length L, a made of plastic film 10 ₀ long with the width W and thickness to form the bag body in the longitudinal direction of the predetermined width dimension W ₁ and the bottom film area 10A which constitutes the bottom film 10a of the packaging bag when, first away from both edges are heat-welded is bent in this area extends a predetermined length W ₁₂ of the bottom film area, the second Bending / welding areas 10AB ₁ , 10AC and one side film piece area 10B ₁ extending a predetermined length from _{one first} bending / welding area AB ₁ and constituting one side film piece 10b ₁ of the packaging bag and The other side film area 10C that extends a predetermined length from the second folding / welding area AC and forms the side film 10c of the packaging bag, and the side film area 10C Configuration and third folding-welding area 10CD, which is thermally welded is bent, the upper surface film 10d of the packaging bag and extends a predetermined length from the bent-welding area in the area extending a predetermined length W ₃₄ given a top film areas 10D, the fourth folding-welding area DB ₂ which extends a predetermined length W ₃₄ from the upper surface film area 10D is heat welded is bent in this area, from the bending-welding area to the other side film strip area 10B ₂ constituting the other side filmstrip 10b ₂ extending length, is divided into.

Incidentally, each of the edge areas a1, a2 of the both sides filmstrip area 10B _1, 10B ₂ is a butt seaming area to form a back seal portion 12 thermally welded by the twofold one another, also shown in FIG. 3 These dividing lines are described for ease of explanation, and there are no such dividing lines in actual plastic packaging materials.

The plastic packaging material 100, the third, fourth folding-welding area 10CD, opening the cut line 11, respectively 10DB ₂ is formed. These unsealing cut lines 11 are on the first surface (surface provided with a sealant layer) of each film in the third and fourth folding / welding areas, and each upper film area side at the time of folding. It is formed in the area located in the area. Further, the opening cut line 11 may be a bent portion.

The plastic packaging material 100 has a length L, a lateral width W, and a thickness that are selected and determined according to the type and size of the article to be packaged. The widths W ₁ and W _{2 of the} bottom film area 10A and the side film area are also determined by the package. The widths W ₁₂ and W ₃₄ of the first and second bent portions and the third and fourth bent portions are about 3 to 10 mm. The total width length (W ₂ + W ₅ ) of one pair of side film piece areas 10B ₁ and 10B ₂ is substantially the same as the width length (W ₃ ) of the other side film area 10C.

  With reference to FIG. 4, the structure of an opening cut line is demonstrated. 4 shows an opening cut line, FIG. 4A is an enlarged view of the IVA portion of FIG. 3, FIG. 4B is a cross-sectional view taken along line IVB-IVB of FIG. 4A, and FIG. 4C is an opening cut line of a modification of FIG. It is sectional drawing shown.

Third, fourth folding-welding area 10CD, each opening cut line 11 of 10DB ₂ have the same structure. Opening cut line 11, as shown in FIG. 4A, which predetermined width along the longitudinal direction, a plurality of slits 11 ₁ consisting of recessed groove length and depth are arranged in a row at predetermined intervals It has become. That is, these _1, as shown in Figure 4B, and is formed with a concave groove 11a having a predetermined depth. The concave shape of the concave groove 11a may be an arbitrary shape, for example, a shape in which the bottom is thinnest and the thickness gradually increases from the bottom toward the surface. The unsealing cut line 11 is thermally welded to the side film, but the welded top film can be smoothly torn along the unsealing cut line. Further, when the pressure in the microwave oven packaging bag in use increases, the concave groove 11a of the slit 11 ₁ is broken only minimal site Relieve upward pressure to the outside, it can be prevented bursting of the packaging bag.

Modification of the opening cut line emission 11A (see FIG. 4), a concave groove 11a, the recess is constituted by a slit 11 ₂ provided the crack 11b of a predetermined depth that placed on the bottom of the groove (see FIG. 4C ). According to the unsealing cut line 11A, the upper surface film 10d can be further smoothly torn along the cut line. Further, when the pressure in the microwave oven packaging bag in use increases, easily torn slits 11 ₂ is further possible to prevent the rupture of the packaging bag. The opening cut line is not limited to the above-described opening cut lines 11 and 11A, but other ones such as continuous (eg, half cut line) or discontinuous grooves, through grooves (eg, perforations). Or a plurality of non-through holes arranged in a line at predetermined intervals.

  Returning to FIG. 3 again, a bag making method using a plastic packaging material and a packaging method for an article to be packaged will be described. This is made and packaged by an automatic packaging machine. In addition, since an automatic packaging machine uses a well-known thing, description is abbreviate | omitted.

For making the packaging bag 10, first, the plastic packaging material 100 is set in an automatic packaging machine (not shown). The set plastic wrapping material 100 is bent and thermally welded by the automatic wrapping machine in the first and second folding / welding areas 10AB ₁ and 10AC of the bottom film area 10A, and the first and second of the bag body. Welded portions 10ab ₁ and 10ac (FIG. 2A) are formed. Next, the third folding / welding area 10CD is bent and heat-sealed so that the unsealing cut line 11 faces the upper film side to form a third welding portion 10cd (see FIG. 2A) of the bag body. folding-welding area 10DB ₂ of 4 fourth weld portion 10b2d is thermally welded is bent to open the cut line 11 is directed to the upper surface film side (see FIG. 2A) is formed. The third, fourth folding-welding area 10CD, weld strength in 10DB ₂ is welded to weaker than heat welding of other parts. Thereafter, the edge areas a1 and a2 of the two side film piece areas 10B ₁ and 10B ₂ are joined together and thermally welded to form the back seal portion 12, and then the plastic packaging material 100 is predetermined in the longitudinal direction. Cut into length, a cylindrical body having both ends opened is formed.

  As shown in FIG. 1, the cylindrical body first has one opening 10 e that is first heat-sealed and sealed to form an end seal portion 13, and an object to be packaged (not shown) is formed from the other opening 10 f. After being packed, heat sealing is performed to form the end seal portion 14, and the packaging bag 10 in which the article to be packaged is packaged is formed. Further, a cut 15 is formed in one end seal portion 13 at a location close to the top film 10d. The cut 15 is a V-shaped notch, an I-shaped notch or the like. The cut 15 may be provided in the other end seal portion 13.

Bag-making packing bag 10, as shown in FIG. 2A, end seal portions 13, 14 of the bag body across the back seal portion 12 and the first to fourth welding portion 10ab _1, 10ac, 10b2d, at 10cd Although these are welded to each other, the welding strength of the back seal portion 12 and the end seal portions 13 and 14 is higher than that of the other third and fourth weld portions 10b2d and 10cd. It is welded. In this way, by increasing the strength of the back seal portion 12 and the end seal portions 14 and 15, the packaged material does not jump out of these places, and the third and The top film 10d can be easily opened from the four welded portions 10b2d and 10cd. Further, even when the internal pressure rises when used in a microwave oven, the top film 10d is peeled off at the third and fourth welds 10b2d and 10cd, and the rising pressure is released from the slits constituting the opening cut line 11. The bag will not rupture.

  By using this plastic packaging material 100, this packaging bag can be easily produced by an automatic packaging machine. Of course, this packaging bag may be made of a separate film.

  With reference to FIG. 5, the opening of the gutter used for this microwave oven is demonstrated. 5 shows the opening state of the opening cut line when the microwave oven is used, FIG. 5A is before opening, FIG. 5B is during opening, and FIG. 5C is a sectional view when opening.

When a package containing moisture, for example, a packaging bag 10 packaging food, is heated in a microwave oven, moisture contained in the food vapors and the pressure in the packaging bag increases. Due to this pressure increase, the packaging bag swells, and the rising pressure is applied to the top film 10d. When elevated pressure is applied to the upper surface film 10d, the fourth weld portion 10cd is lifted upward, the welded portion is started peeling, recessed grooves 11a which constitutes the slit 11 ₁ a opening cut line 11 the peeling progresses Is broken and the boosting force is released. 5A to 5C show an opened state of one welded portion 10cd (see FIG. 2A).

  The packaging bag 10 is folded before being loaded with an article to be packaged, is not bulky, and is easy to transport and store. On the other hand, when the article to be packaged is packed inside, the packaging bag 10 is self-supporting. I can. When opening the packaging bag 10, when the cut is torn from 15, the end seal portion is first torn and then torn along the opening cut line of the top film (see FIG. 6). Thereby, without using scissors etc., it can open easily with a beautiful opening shape mouth, and can use it as a good-looking container after opening. In addition, it is possible to heat the package by placing it in a microwave oven in this self-supporting state. After heating, the package can be opened with a clean opening shape. After opening, the package can be used as it is without being transferred to another. .

10 gusseted packaging bag 10a bottom film 10a 'folded portion 10b, 10c side films 10d top film 100 of plastic packaging material 10 ₀ plastic film 11,11A opening cut lines 12, 14 end seal portion 15 cuts

Claims (7)

Both ends are opened at the bottom film to be folded into a bottom film, a pair of opposite side films respectively connected to both end edges of the bottom film, and a top film connected to the respective top edges of these side films. In a gusset packaging bag in which a cylindrical body is formed, one opening is preliminarily heat-welded, and the other opening is heat-sealed after the object to be packaged is packed and packaged.
The upper surface film is provided with an opening cut line at both end edges and thermally welded at the edge of the side film, and a cut is formed at a heat welded position of one of the openings. Gusset packaging bag.   The opening cut line is formed of any one of a plurality of continuous or non-continuous grooves and through or non-through holes arranged in a line at a predetermined interval on the upper film surface. Item 10. A gusset packaging bag according to item 1.   2. The gusset packaging bag according to claim 1, wherein the opening cut line is formed by a recessed groove having a predetermined width, length, and depth in the upper surface film.   The gusset packaging bag according to any one of claims 1 to 3, wherein the top film has a smaller area than the bottom film.   The gusset packaging bag according to any one of claims 1 to 4, wherein the bottom film, the side film, and the top film are made of a single plastic film.   The gusset packaging bag according to claim 5, wherein the plastic film is a laminated film in which at least a base material layer and an easily peelable sealant layer are laminated.   The gusset packaging bag according to claim 6, wherein the heat-sealing seal of the opening is welded with a strength higher than that of heat-sealing at other locations.