JP2012096840A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag that can be easily torn for opening, forms a neat mouth when torn, and allows easy open by fingers pinching a level difference formed in the mouth to be torn.SOLUTION: The packaging bag has a laminate including outer layers, intermediate layers, and inner layers each having edge heat adhesive parts at facing edges. On one of the outer layers of the laminate, a first cut line is formed which continues from one edge of the edge heat adhesive part to the other edge located on the same position as the start edge in the direction parallel with the edge heat adhesive part. On the other outer layer of the laminate, a second cut line is formed in the same way as the first cut line. In the first and second cut lines, the start edge and the terminal edge include a plurality of cut lines and one cut line connecting them, respectively. When the packaging bag is opened by tearing the mouth along the first and second cut lines, a level difference is formed in the mouth.

Description

  The present invention can be easily torn and opened, and the tear opening when it is torn and opened is beautiful and the outline of the tear opening is different so that a step for easily opening with fingers can be formed. The present invention relates to a packaging bag, and further to a packaging bag having a resealing function by providing a synthetic resin bite composed of a male member and a female member that are engaged with each other at opposing positions on the inner surface of the packaging bag. .

  Conventionally, in a three-side seal type, four-side seal type, or standing type packaging bag, the outer edge of the front side laminate constituting the packaging bag starts from the outer edge of the left edge thermal bonding portion, and the right edge heat A continuous first cut line is formed with the outer edge of the bonded portion as the end point (the position of the starting point and the end point in the height direction [the direction parallel to the left and right side edge thermal bonding portions] is the same), and the packaging bag is configured. In the outer layer of the back side laminate, the outer edge of the left edge thermal bonding part is the starting point, and the outer edge of the right edge thermal bonding part is the end point (the height direction of the starting point and end point [parallel to the left and right side edge thermal bonding parts A second cut line that is continuous as the direction of the direction] is formed, and a part of the formation positions of the first cut line and the second cut line on the rectangular plane of the laminate in a state where the packaging bag is viewed in plan By making it different, the first cut line and the second cut line When the upper end side of the packaging bag is torn open in the width direction (the direction orthogonal to the left and right side edge thermal bonding portions), the outer side of the cut surface of the laminate on the front side that forms the tear opening and the back side lamination There has been proposed a packaging bag in which an opening when a content is taken out is made easier by making a difference in a tear opening by making the outline of a cut surface of the body different (see, for example, Patent Document 1).

  Furthermore, a packaging bag is also proposed in which a step is created in the same kind of tear opening to facilitate opening when the contents are taken out, and a packaging bag having a reseal function (see, for example, Patent Document 2). ).

  However, as in the first to fourth embodiments of the packaging bag described in Patent Document 1, the first cut line and the second cut line are constituted by a single cut line, and visually at the opening start end. When a notch (I-shaped, V-shaped, turtle shell notch, etc.) that is easier to open functionally is formed, the notch and the score line cannot be formed at the same time. There is a danger of misalignment (the notch tip and the cut line do not coincide).

  On the other hand, from the start point to the end point, the first cut line and the second cut line are a plurality of cut lines as in the fifth embodiment of the packaging bag described in Patent Document 1 and the packaging bag described in Patent Document 2. If configured, the risk of misalignment between the notch and the cut line can be considerably suppressed. For example, the upper end side region of the packaging bag is picked and twisted to the near side (front side) along the first cut line. When the front side laminate constituting the packaging bag is torn, the entire layer (outer layer, intermediate layer, inner layer) is torn along the first cut line, whereas the back side laminate constituting the packaging bag is Some of the layers may remain in the form of strips and remain at the cut edge of the back side laminate that forms the opening in a kind of beard, and similarly, the area on the upper end side of the packaging bag is removed. If it is torn to the back side (back side) along the second cut line, a packaging bag is formed. The entire laminate (outer layer, intermediate layer, inner layer) is torn along the second cut line, whereas the laminate on the front side that constitutes the packaging bag has a part of the layer remaining in a band shape. In some cases, it may remain at the cut end of the front-side laminate constituting the opening in a state like a kind of beard, which is not preferable from the viewpoint of aesthetics and hygiene.

JP 2005-289396 A JP 2003-104394 A

  The present invention can be easily torn and opened, and the tear opening at the time of tearing and opening is beautiful and the outline of the tear opening is different so that a step for easily opening with fingers is formed. By devising the shape and combination of the cut line, in particular, the position of the notch and the cut line will not shift or bend at the time of opening. It is an object of the present invention to provide a packaging bag having a resealing function by providing a synthetic resin occlusion device comprising a male member and a female member that are engaged with each other.

  As a result of studying the mechanism of the occurrence of whiskers at the time of opening, the present inventor configured the packaging bag when the upper end side region of the packaging bag is picked and torn to the front side (front side) along the first cut line. The front side laminated body tends to tear all layers (outer layer, intermediate layer, inner layer) along the first cut line, but the back side laminated body constituting the packaging bag has all layers along the second cut line. Although the (outer layer, intermediate layer, inner layer) are generally torn, only the belt-like region of the outer layer sandwiched between the plurality of second cut lines of the laminate on the back side constituting the packaging bag is peeled off from the intermediate layer to open the opening. Similarly, if the upper side of the packaging bag is left behind at the cut end of the laminate on the back side, the packaging bag is torn so as to be twisted to the back side (back side) along the second cut line. Only the outer belt-like region sandwiched between the plurality of first cut lines of the front side laminated body constituting By remaining in cut of the front side of the laminated body constituting the opening separated from the interphase layer, it was concluded that beard is occurring.

  Therefore, the present inventor has a single cut line (first cut line and second cut line) that does not cause whiskers but easily generates a shift between the cut line and the cut line, and a positional shift between the cut line and the cut line. Good tear line (notch and cut line) that follows the cut line of the outer layer by combining multiple cut lines (first cut line and second cut line) that do not occur but are likely to generate beards in an appropriate arrangement The present invention has been made on the basis of the knowledge that it is possible to form a misalignment and a whisker.

  In order to achieve the above object, the inventor of the present invention described in claim 1, the inner layers of a rectangular laminate having at least an outer layer, an intermediate layer made of aluminum, and an inner layer made of a heat-adhesive resin And at least an edge thermal bonding portion is formed at an opposing position of a pair of opposing edges, and one outer edge of the edge thermal bonding portion is a starting point on one outer layer of the laminate, A first cut line is formed with the other outer edge having the same position in the direction parallel to the starting point and the edge thermal bonding portion as an end point, and the edge thermal bonding portion of the edge thermal bonding portion is formed on the other outer layer of the laminate. A second cut line is formed with one outer edge as a starting point and the other outer edge having the same position in the direction parallel to the starting edge and the edge thermal bonding portion as an end point, and the laminated body in the planar view state The shape of the first cut line and the second cut line By making the position different, when the upper end side of the packaging bag is torn and opened in the direction perpendicular to the edge thermal bonding portion along the first cut line and the second cut line, the tear opening is formed. A packaging bag that creates a step in a tear opening by differentiating the outline of one cut surface of the laminate to be formed and the outline of the other cut surface of the laminate, the first cut line and The second cut line is a plurality of cut lines on the starting side that travel in a direction perpendicular to the edge thermal bonding portion from the starting point and reach the inner edge of the edge thermal bonding portion on the starting side, and the edge heat from the end point. Advancing in a direction perpendicular to the bonding part and ending with a plurality of score lines on the end point side reaching the front edge of the inner edge of the end edge thermal bonding part, and converged from the end points of the plurality of score lines on the start point side It consists of a single cut line that branches to the end of multiple cut lines on the end point side. It is characterized in.

  Further, the present invention according to claim 2 is the packaging bag according to claim 1, wherein the one score line is a single score line constituting a plurality of score lines on the start side or the end point side. It is characterized by being formed wider than the width.

  Moreover, in the packaging bag according to any one of claims 1 and 2, the present invention described in claim 3 is located at a position where the inner surface of the packaging bag on the lower end side from the first cut line and the second cut line is opposed to each other. A synthetic resin occlusion device comprising a protruding male member and a concave female member that are engaged with each other is provided, and has a resealing function by engaging the male member and the female member. It is what.

  According to this invention, the laminated body in the region on the starting point side and the ending point side where a plurality of score lines where beards are likely to occur is firmly laminated at the edge thermal bonding portion so that peeling does not occur. In addition, the belt-shaped region itself can be prevented from being generated by converging into one when entering the inner side from the edge thermal bonding portion. In addition, by setting the number of cut lines on the start side and the cut line on the end side to a plurality, when forming a notch as the opening start end, simultaneously form a cut line represented by punching and laser processing. It is possible to reduce the risk of misalignment between the notch and the score line, which is caused by the failure to perform.

  In addition, a plurality of cut lines on the start side and the end side are converged by entering inside the edge thermal bonding portion from the line width of one cut line constituting a plurality of cut lines on the start side and the end side. Further, by making the line width of one cut line wide, it is possible to achieve a smooth transition of the tear-open line from the plurality of cut lines on the start point side or the end point side to one cut line. That is, even if it tears from any of a plurality of cut lines on the starting point side and the ending point side, it can be torn smoothly.

  In addition, a synthetic resin occlusion device comprising a protruding male member and a concave female member that mesh with each other is provided at a position facing the inner surface of the packaging bag on the lower end side of the cut line of the packaging bag. And it can be set as the packaging bag provided with a resealing function by biting the said male member and the said female member.

It is a top view which shows diagrammatically the positional relationship of the cut line of the packaging bag concerning this invention, and an occlusion tool. It is a figure which shows the XX sectional view of FIG. It is a principal part enlarged plan view which shows the Example of the score line formed in the packaging bag concerning this invention schematically. 4A is a diagram schematically showing a cross section along line YY in FIG. 3, and FIG. 4B is a diagram schematically showing a cross section along line ZZ in FIG. It is an opening figure of the state which left one side edge heat bonding part of the packaging bag shown in FIG.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a plan view schematically showing the positional relationship between a cut line and a bite of a packaging bag according to the present invention, FIG. 2 is a diagram schematically showing a cross section taken along line XX of FIG. 1, and FIG. FIG. 4 (a) is a diagram schematically showing a section taken along the line YY of FIG. 3, and FIG. 4 (b) is a diagram schematically showing an example of the cut line formed in the packaging bag. The figure which shows a ZZ line cross-section schematically, and is an opening figure of the state which left the one side end thermal bonding part of the packaging bag shown in FIG. 3, 1 in a figure is a packaging bag, 2 is edge thermal bonding Part, 2 'is a thermal bonding part on the side edge, 2 "is a thermal bonding part on the upper and lower edges, 3 is a first cut line, 3' is a second cut line, 10 is a laminate, 11 is an outer layer, 12 is an intermediate Layer, 13 is an inner layer, 20 is a synthetic resin bite, 21 is a male member of a ridge, 22 is a female member of a ridge, 30A, 30B, 30C, 30a, 30b, 30c are first straight cut lines, 30D, 31D Substantially U-shaped score line, 31A, 31B, 31C, 31a, 31b, 31c denotes a second straight score line, alpha is score line forming regions, beta is a zipper formation region, respectively.

  FIG. 1 is a plan view schematically showing the positional relationship between a score line and a bite of a packaging bag according to the present invention, and FIG. 2 is a diagram schematically showing a cross section taken along line XX of FIG. The outer layer 11, the intermediate layer 12 made of aluminum foil, and the inner layer 13 made of a heat-adhesive resin layer are laminated, the inner layers 13 of the rectangular laminate 10 are overlapped with each other, and the four peripheral edges are thermally bonded. It is a four-side seal type packaging bag sealed with a heat bonding part 2. In the present specification, among the edge thermal bonding portions 2, a set of the edge thermal bonding portions 2 positioned in the left-right direction in FIG. 1 and the like are referred to as side edge thermal bonding portions 2 ′. 1 and the like, the pair of edge thermal bonding portions 2 positioned in the vertical direction are referred to as upper and lower edge thermal bonding portions 2 ". The packaging bag 1 is a rectangular laminated layer constituting the packaging bag 1. A cut line forming region α in which a first cut line 3 and a second cut line 3 ′ are formed in one outer layer and the other outer layer of the body 10 so that the forming positions are different in a plan view of the packaging bag 1. And a synthetic resin occlusion tool 20 comprising a protruding male member 21 and a concave female member 22 which are engaged with each other on the lower end side (lower end edge thermal bonding portion 2 ″ side) of the cut line forming region α. And an articulator forming region β.

  Next, embodiments of the cut lines (the first cut line 3 and the second cut line 3 ') formed in the packaging bag 1 will be specifically described in detail. FIG. 3 is an enlarged plan view of an essential part schematically showing an example of a cut line formed in the packaging bag according to the present invention, FIG. 4A is a diagram schematically showing a cross section along line YY in FIG. b) is a diagram schematically showing a cross section taken along the line ZZ in FIG. 3, and the cut line is formed on one outer layer 11 of the laminated body 10 constituting the packaging bag 1 and one of the side end heat bonding portions 2 ′. The phase (position) in the direction perpendicular to the side edge thermal bonding portion 2 ′ of the packaging bag 1 from the outer edge and the other outer edge in the direction perpendicular to the side edge thermal bonding portion 2 ′ (for example, the upper end) A plurality (three on the upper side in FIG. 3) extending at the same distance (distance from the outer edge of the edge thermal bonding portion 2 ″) and having the terminal ends reaching the inner edge of the side edge thermal bonding portion 2 ′. The first straight cut lines 30A, 30B, 30C and 30a, 30b, 30c and one substantially U-shaped cut that connects the respective ends. The side edges from one outer edge and the other outer edge of the side edge thermal bonding portion 2 ′ to the first cut line 3 composed of the line 30 </ b> D and the other outer layer of the laminated body 10 constituting the packaging bag 1. A plurality of lines extending in the same direction (position) and length as the first straight cut lines 30A, 30B, 30C and 30a, 30b, 30c in the direction orthogonal to the edge thermal bonding portion 2 ′ (in FIG. 3) second straight cut lines 31A, 31B, 31C and 31a, 31b, 31c, and a second cut line 3 'composed of one substantially U-shaped cut line 31D connecting the respective ends. The first straight cut line and the second straight cut line are preferably formed with the same line width.

  In FIG. 3, the first straight cut lines (30A, 30B, 30C and 30a, 30b, 30c) and the second straight cut lines (31A, 31B, 31C and 31a, 31b, 31c) are equally spaced 3 Although what provided this was described, it is not limited to this, What is necessary is just two or more, Preferably it is three or more. In FIG. 3, one line of the first straight cut lines (30A, 30B, 30C and 30a, 30b, 30c) and the second straight cut lines (31A, 31B, 31C and 31a, 31b, 31c). Although the line width of the substantially U-shaped cut line (30D, 31D) is shown to be wider than the width, the line width of the substantially U-shaped cut line (30D, 31D) is the first straight cut line. And a line width that does not become narrower than the line width of the second straight cut line, that is, the same line width, or more preferably a wider line. In FIG. 3, the most distant width (deviation width) between the substantially U-shaped cut line 30D and the substantially U-shaped cut line 31D in a plan view is preferably at least 3 mm. By configuring in this way, the tear opening line smoothly transitions to the substantially U-shaped cut line regardless of which side the linear cut line is torn, the tear opening is beautiful and the outline of the tear opening is different Thereby, the level | step difference for opening easily with a finger is formed in an opening part.

  In addition, the interval between the first straight cut lines or the second straight cut lines is preferably about 0.5 to 1.0 mm. By comprising in this way, the danger that a tearing open line will remove | deviate from a 1st linear cut line or a 2nd linear cut line can be reduced. The line width of each cut line of the first straight cut line or the second straight cut line is about 0.1 to 0.3 mm, and the line width of the substantially U-shaped cut line is the first straight cut line. A line width of 1.5 times or more the line width of the line of sight or the second straight cut line is preferred.

  The packaging bag 1 configured as described above is configured so that the first cut line 3 has the first cut line 3 from the outer edge of the side edge thermal bonding portion 2 ′ intersecting the first cut line 3, for example, the left side in FIG. 3. When tearing along the second linear score line 31A of the side edge thermal bonding portion 2 ′ and the second score line 3 ′ intersecting with the linear score line 30A, it is torn linearly and torn. The unsealing line reaches the substantially U-shaped cut line 30D and the substantially U-shaped cut line 31D, and the first straight cut line 30A extends along the substantially U-shaped cut line 30D and the second straight line. The cut line 31A is torn along the substantially U-shaped cut line 31D. As shown in FIG. 5, the tear opening line becomes a good tear line following the cut line of the outer layer, and the tear opening Is beautiful without whiskers and has a different outline of the tear opening Since the step (step due substantially U-shaped score line 30D and 31D) are formed by, it can be easily opened can pluck stepped portion easily with fingers.

Further, although not shown, the outer edge of the opposing side edge thermal bonding portion 2 ′ provided with a plurality of first straight cut lines (or second straight cut lines) at least on both sides. I-shaped at the position of the outer edge (if it is an odd number of cut lines, it will match the center cut line, and if it is an even number of cut lines, it is an appropriate position where the cut lines are located on both sides) , V-shaped, turtle shell, etc., and also includes a plurality of first straight cut lines (or second straight cut lines) and a plurality of first straight cut lines (or second straight cut lines). By visually providing a shape that guides in the direction of the center cut line of the center line), for example, a group of tapered scars in the direction from the outer edge to the inner edge of the side edge thermal bonding portion 2 ′, In terms of functionality, the opening may be easier.

  Further, in FIG. 3, each of a plurality of (three in FIG. 3) first straight cut lines (or second straight cut lines) respectively formed on the opposite side edge thermal bonding portions 2 ′. One substantially U-shaped cut line (30D or 31D) that connects the terminal ends is not limited to an approximately U-shape, and may be, for example, an arc shape, or a plurality of first straight lines. All the configurations of categories that do not deviate from the gist of the present invention are included in the present invention.

  Next, the laminated body 10 which comprises the packaging bag 1 is demonstrated. As the outer layer of the laminated body 10, since it becomes a basic material constituting the packaging bag 1, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like can be used. For example, polyester Resins such as those based on polyamide, polyamide and polypropylene can be used. Moreover, as a film using these resin, the stretched film extended | stretched to the biaxial direction is suitable. This is because usually the outer layer 11 is often printed, and printability is required. The thickness of the film constituting the outer layer 11 may be determined in consideration of cost and the like, but is generally about 12 to 25 μm.

  Moreover, as an aluminum foil used for the intermediate | middle layer 12 of the said laminated body 10, the annealed aluminum foil is suitable, and the thickness is about 6-15 micrometers.

  The inner layer 13 of the laminate 10 may be any layer formed from a heat-adhesive resin that can be melted by heat and welded to each other. For example, 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 resin, acid copolymer of ethylene and acrylic acid, ester copolymer of ethylene and acrylic acid ester, and the like. Further, the thickness of the film constituting the inner layer 13 may be determined in consideration of required physical properties and costs.

The laminate 10 has physical properties required when forming a packaging bag between the intermediate layer 12 and the inner layer 13, for example, mechanical toughness, bending resistance, puncture resistance, impact resistance, In order to impart physical properties such as cold resistance, heat resistance, chemical resistance, etc., a strength reinforcing layer made of a film or resin layer of polyolefin such as polyester, polyamide, polyethylene, polypropylene, ethylene-propylene copolymer is provided. The strength reinforcing layer may be a combination of the film and the resin layer, and the thickness may be determined in consideration of required physical properties and costs.

  Moreover, as a lamination | stacking method of each layer of the said laminated body 10 which comprises the packaging bag 1 of this invention, what is necessary is just to laminate | stack suitably using well-known lamination methods, such as a sandwich lamination method and a dry lamination method. The first cut line 3 and the second cut line 3 ′ may be physically formed using a rotary die cutter, but preferably the laminate 10 is formed using a pulsed laser or the like. Later, the outer layer 11 is formed. As a kind of laser used for this, a carbon dioxide laser, a YAG laser, a semiconductor laser, an argon ion laser, etc. are possible, and it is not particularly limited.

  In addition, the four-side seal type packaging bag has been described so far, but in short, the packaging bag in a mode in which at least the edge thermal bonding portion is formed at the opposed position of the pair of opposed edges, specifically, Even a three-way seal type or a standing type packaging bag may be used.

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Edge thermal bonding part 2 'Side edge thermal bonding part 2 "Upper / lower edge thermal bonding part 3 1st cut line 3' 2nd cut line 10 Laminated body 11 Outer layer 12 Intermediate layer 13 Inner layer 20 Synthetic resin Articulated tool 21 Convex male member 22 Concave female member 30A, 30B, 30C First straight cut line 30a, 30b, 30c First straight cut line 30D, 31D Substantially U-shaped cut line 31A, 31B , 31C Second straight cut line 31a, 31b, 31c Second straight cut line α Cut line forming region β Articulating device forming region

Claims (3)

The inner layers of a rectangular laminate having at least an outer layer, an intermediate layer made of aluminum, and an inner layer made of a heat-adhesive resin are overlapped with each other, and at least the edge thermal bonding is performed at an opposing position of a pair of opposing edges. And forming one outer layer of the laminate with the other outer edge having the same position in the direction parallel to the starting edge and the edge thermal bonding portion as a starting point. A continuous first cut line is formed as an end point, and the position of the other outer layer of the laminate in the direction parallel to the start point and the edge thermal bond portion, starting from one outer edge of the edge thermal bond portion By forming the second cut line that continues from the other outer edge that is the same as the end point, the formation position of the first cut line and the second cut line in the planar view state of the laminate is different, First cut line and second cut line When the upper end side of the packaging bag is torn and opened in a direction perpendicular to the edge thermal bonding portion, the outer surface of one cut surface of the laminate and the other cut surface of the laminate are formed. A packaging bag that creates a step in the tear opening by making the outer shell different from each other, wherein the first cut line and the second cut line proceed from the starting point in a direction perpendicular to the edge thermal bonding portion, and the starting point Before the inner edge of the end edge thermal bonding part, the multiple cut lines on the starting side that reach the inner edge of the edge thermal bonding part on the side, and the progress line in the direction perpendicular to the edge thermal bonding part from the end point A plurality of score lines on the end point side reaching up to, and a single score line that converges from the end points of the plurality of score lines on the start point side and branches to the end points of the plurality of score lines on the end point side A packaging bag characterized by being made. 2. The packaging according to claim 1, wherein the one cut line is formed wider than a line width of one cut line constituting a plurality of cut lines on the starting point side or the ending point side. bag. A synthetic resin occlusion device comprising a protruding male member and a concave female member that mesh with each other at opposing positions on the inner surface of the packaging bag at the lower end side of the first cut line and the second cut line. The packaging bag according to claim 1, wherein the packaging bag is provided and has a resealing function by engaging the male member and the female member.

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