JP5561107B2 - Packaging bag - Google Patents

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). ).

  Here, as in the second embodiment of the packaging bag described in Patent Document 1 or the packaging bag described in Patent Document 2, one of the first cut line and the second cut line (for example, the back side) is used. A straight cut line of one of the laminates along the straight cut line, with a straight cut line and the other (for example, the front side) an irregular (non-linear) cut line swollen to the lower end side. A tongue-shaped step due to a combination of a general outline and an arc-shaped outline of the cut surface of the other laminate along the cut line bulging on the lower end side is most desirable as a step for easily opening with fingers It is said that.

  However, when opening the packaging bag, if the surface with the irregular cut line of the packaging bag is turned forward, the area on the upper end side from the cut line is picked and torn forward, along the irregular cut line An arc-shaped tear line that swells to the lower end side is formed, but some users open the bag with the irregular cut line side of the packaging bag facing forward and the upper end from the cut line. In some cases, the tearing line may be removed from the irregular cut line, and the initially planned tongue piece-shaped step may not be formed.

JP 2005-289396 A JP 2003-104394 A

  The present invention can be easily torn and opened, and the tear opening when it is torn and opened is beautiful, and the outer surface of the laminate on the front and back sides of the tear opening is different, resulting in a difference in level. A packaging bag having at least an outer layer that can be opened in the middle, an intermediate layer made of aluminum foil, and an inner layer made of a heat-adhesive resin, and the cut formed on the front and back laminates constituting the packaging bag By devising the shape of the line of sight and the combination thereof, the packaging bag can be torn without tearing away from the cut line even if it tears in the tearing direction at the time of opening, specifically the front side or the back side Alternatively, a packaging bag having a resealing function can be provided by providing a synthetic resin occlusion device composed of a male member and a female member that mesh with each other at opposing positions on the inner surface of the packaging bag. A an object of the present invention.

  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, wherein the first cut line is A starting line on the starting side that extends in the direction perpendicular to the edge thermal bonding portion from the starting point and reaches the inner side of the inner edge of the edge thermal bonding portion on the starting side, and the edge heat from the end point From one end line on the end point that travels in the direction perpendicular to the bonding part and reaches the inner side of the inner end edge of the end edge thermal bonding part on the end point side, and from the end of the one cut line on the start side It consists of a plurality of cut lines that diverge and converge at the end of one cut line on the end point side. The second cut line is composed of one to a plurality of cut lines from the start point to the end point, and the formation of the plurality of cut lines constituting the first cut line in a plan view state of the laminate. The position is composed of a cut line that swells toward the upper end side and a cut line that swells toward the lower end side.

    Further, the present invention according to claim 2 is the packaging bag according to claim 1, wherein the convexes meshing with each other at opposite positions on the inner surface of the packaging bag at the lower end side from the first cut line and the second cut line. A synthetic resin occlusion device comprising a male member of a strip and a female member of a concave strip is provided, and a resealing function is provided by engaging the male member and the female member.

  According to this invention, when the surface provided with the first cut line of the packaging bag is directed toward the front, the region on the upper end side from the first cut line is picked with fingers and torn toward the front, two sheets constituting the packaging bag are formed. Among the laminates, the laminate on the near side is formed with a tear line along one cut line starting from the start side, a cut line bulging to the lower end side, and one cut line on the end point side. When the upper end region is picked from the line of sight and torn to the back side, among the two laminated bodies constituting the packaging bag, the near side laminated body is a cut line that swells to the starting side and the upper line. Since a tear line is formed along one cut line on the end point side, the tear line can be torn without departing from the cut line.

  Furthermore, 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 opposite to 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 top view which shows schematically 1st Embodiment of the score line formed in the packaging bag concerning this invention. (A) is a figure which shows the YY sectional view schematically of FIG. 3, (b) is a figure which shows the ZZ sectional view schematically of FIG. It is a principal part top view which shows schematically 2nd Embodiment of the score line formed in the packaging bag concerning this invention. It is an opening figure of the state which left one side edge thermal adhesive 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. The principal part top view which shows diagrammatically 1st Embodiment of the cut line formed in this packaging bag, FIG.4 (a) is a figure which shows the YY sectional view schematically of FIG. 3, (b) is FIG. FIG. 5 is a plan view schematically showing a second embodiment of the score line formed in the packaging bag according to the present invention, and FIG. 6 is the packaging shown in FIG. 1 is a packaging bag in which one side edge thermal bonding portion of the bag is left, 1 in the figure is a packaging bag, 2 is an edge thermal bonding portion, 2 ′ is a side edge thermal bonding portion, and 2 ″ is an upper side.・ Lower edge thermal bonding part, 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 the male member of the ridge, 22 is concave Female members 30A, 30B are first straight cut lines, 30C, 30E are first upper cut lines, 30D, 30F are first lower cut lines, 31A, 31B, 31C are second straight cut lines, α indicates a cut line forming region, and β indicates a bite forming region.

  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, 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 a plan view of an essential part schematically illustrating a first embodiment of a score line formed in the packaging bag according to the present invention, and FIG. 4A is a diagram schematically illustrating a cross section along line YY in FIG. (B) is a figure which shows the ZZ line | wire cross section of FIG. 3 schematically, Comprising: A cut line is one outer layer 11 of the laminated body 10 which comprises the packaging bag 1, and the said side end heat-bonding part 2 'is shown. A phase (position) in a direction orthogonal to the side edge thermal bonding portion 2 ′ of the packaging bag 1 in a direction orthogonal to the side edge thermal bonding portion 2 ′ from one outer edge and the other outer edge (for example, The first linear cut lines 30A and 30B extending at the same distance) from the outer edge of the upper edge thermal bonding part 2 ″ and the first linear cut lines 30A and 30B swell to the upper end side connecting the respective ends. A first cut line 3 including a first upper cut line 30C and a first lower cut line 30D that swells to the lower end side, and the packaging bag 1 are configured. In the other outer layer 11 of the laminated body 10, the first linear shape extends from one outer edge and the other outer edge of the side edge thermal bonding portion 2 ′ in a direction perpendicular to the side edge thermal bonding portion 2 ′. The second straight cut lines 31A and 31B extending in the same phase (position) and length as the cut lines 30A and 30B, and the second straight cut lines 31A and 31B are connected to each other by a straight line. The second cut line 3 'is composed of a straight cut line 31C.

  The packaging bag 1 configured as described above is formed by gripping the outer edge of the side edge thermal bonding portion 2 ′ where the first cut line 3 intersects, for example, the region on the upper end side from the left side in FIG. When tearing to the near side from the first cut line, of the two laminated bodies constituting the packaging bag, the front laminate is linearly along the first straight cut line 30A and the second straight cut line 31A. As a result of tearing integrally and reaching the branch point of the first lower end side cut line 30D in which the tear opening line swells toward the lower end side and the first upper end side cut line 30C swelling toward the upper end side, the first tearing line opens. The second straight cut line 31 is torn along the first lower cut line 30D from the straight cut line 30A and the second straight cut line 31C. First straight cut line 30B and second straight cut line 31 Thus, the first lower cut line 30D is integrated along the first linear cut line 30B, and the second linear cut line 31C is integrated linearly along the second linear cut line 31B. Torn and opened. As shown in FIG. 6, the tear opening line is composed of a smooth curve and a straight line, and the opening can be made beautiful. In addition, the tear opening line formed by the first lower cut line 30D and the second straight cut line 31C can be easily picked and opened from one side of the laminate 10 in order to generate a step. it can.

  Further, although illustration or detailed explanation is omitted, when the packaging bag 1 is opened in FIG. 3, if the region on the upper end side from the left side in FIG. From the first straight cut line 30A as a result of tearing to the far side, reaching the branch point of the first lower cut line 30D bulging to the lower end side and the first upper cut line 30C bulging to the upper end side. Other than being torn along the first upper end side cut line 30C, it is torn and opened in the same manner as in the case of tearing to the near side.

  FIG. 5 is a plan view schematically showing a second embodiment of the cut line formed in the packaging bag according to the present invention. In FIG. 3, the first upper end side cut of the first cut line is shown. Although the eye line 30C and the first lower end side cut line 30D are shown in an arc shape, the first upper end side cut line 30E and the lower end side bulge to the upper end side of a substantially U-shape instead of the arc shape. The first lower end side cut line 30F is the same as FIG. 3, and the description thereof is omitted. In the case of the second embodiment, the first upper cut line 30E or the first lower cut line 30F is substantially U-shaped with respect to the first straight cut line 30A or 30B of the first cut line 3. Is preferably 160 to 175 degrees.

  In FIG. 3, the first upper end cut line 30C and the first lower end cut line 30D have an arc shape, and in FIG. 5, the first upper end cut line 30E and the first lower end cut line. Although 30F was illustrated as a substantially U-shaped shape, the first upper end side cut line and the first lower end side cut line are not limited to this, and are substantially U-shaped or the like. Alternatively, the shapes of the first upper end side cut line and the first lower end side cut line may be different.

Further, the first upper end side cut line 30C and the first lower end side cut line 30D that connect the respective ends of the first linear cut line 30A and the first linear cut line 30B, or the first upper end side cut line. 30E and the first lower end side cut line 30F are shown as a single cut line, but the number is not limited to one, and each may be composed of a plurality of lines, or the number of the upper end side and the lower end side may be different It may be. Further, the interval between the score lines when a plurality of lines are provided is preferably 1 mm or less. It should be noted that one step of the laminated body constituting the packaging bag 1 and the other are designed with fingers easily so that the level difference in the tear opening of the first cut line 3 and the second cut line 3 ′ is 6 mm or more. This is preferable because it can be picked.

  3 and 5, the second cut line 3 ′ is shown as a single straight cut line, but one or more straight cut lines on both sides so as to sandwich the second cut line 3 ′. May be a plurality of linear cut lines, and an arcuate upper end side in place of the second straight cut lines 31C constituting the second cut lines 3 ′ and / or In any case, the second cut line 3 ′ may be the first upper cut line that bulges to the upper end side of the first cut line 3. It is preferable to configure so as to be located in a region between the first lower end side cut lines that bulge to the lower end side.

  Further, the position where the first straight cut line 30A (or the second straight cut line 31A) intersects the outer edge of the side edge thermal bonding portion 2 ′, or the first straight cut line 30B ( Alternatively, at the position where the second linear cut line 31B) intersects with the outer edge of the side edge thermal bonding portion 2 ′, a cut or scar group such as I-shape, V-shape, U-shape, turtle shell shape, etc. By providing the opening start means, it is possible to make the opening easier both visually and functionally.

  In addition, the four-side seal type packaging bag has been described so far, but in short, a packaging bag having a configuration in which at least one edge thermal bonding portion is formed at the opposed position of a pair of opposed edges, for example, three-way It may be a seal type or a standing type packaging bag. Further, it goes without saying that all the categories not departing 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.

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 Occlusal tool 21 Convex male member 22 Concave female member 30A, 30B First straight cut line 30C, 30E First upper cut line 30D, 30F First lower cut line 31A, 31B, 31C Second Straight cut line α Cut line forming region β Articulating device forming region

Claims (2)

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 advances from a starting point in a direction perpendicular to the edge thermal bonding portion, and One incision line that reaches the inside from the inner edge of the edge thermal bonding portion, and the inside of the edge thermal bonding portion on the end point side that proceeds in a direction perpendicular to the edge thermal bonding portion from the end point One cut line that reaches the inner side of the end edge and a plurality of cuts that converge from the end of the one cut line that converges at the end of the one cut line that branches from the start side The second cut line is composed of one or more cut lines from the start point to the end point. And the formation position of the plurality of cut lines constituting the first cut line in the plan view of the laminate is configured by a cut line that swells on the upper end side and a cut line that swells on the lower end side. A packaging bag featuring. 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, further comprising a reseal function provided by engaging the male member and the female member.

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