JP5958214B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag, and particularly relates to a packaging bag having a resealing means at an opening and excellent in opening and reopening operability.

  A packaging bag is known in which a resealing means such as a synthetic resin fastener is attached to the opening so that resealing is possible even after opening. The contents are not used all at once, but are suitable for applications where they are used several times.

  Such a packaging bag is generally designed so that the resealing means is horizontally arranged under the top seal part and the space between the top seal part and the reseal means is opened horizontally. Many.

  As the opening method, use a scissors to cut the laminate on the front and back, or use the opening start part such as a U-shaped or V-shaped notch provided on the left and right side seals as a trigger to laminate the front and back The method of tearing the body is common. In the case of tearing, in order to prevent the tear from being bent and hitting the re-sealing means, there is also a type in which a tear line is made in advance so that the tear runs linearly.

  In the case of a packaging bag provided with resealing means, the resealing means is closed in an unopened state, so that the opening is not automatically opened even when the packaging is opened. For this reason, when the laminates on the front and back surfaces are cut at the same position, there is a problem that it is difficult to grasp the trigger when holding the resealing means by hand when opening.

  The packaging bag described in Patent Document 1 is made in order to solve this problem, and by making only one of the front and back laminates a synthetic resin sheet having an alignment direction of the crystal region, The opening of the laminate on the front and back surfaces is not aligned when opened.

  The packaging bag described in Patent Document 1 utilizes the property that the synthetic resin sheet having the alignment direction is linearly split and the other sheet is not so that the cut ends are not aligned. However, the cut edges of the sheet having no alignment direction are not uniform and are not preferable in appearance. In addition, since the rift is a matter of course, it is not always easy to tear so that a stable opening is not expected.

  The opening mechanism of the storage bag described in Patent Document 2 is intended to solve the same problem, but means for solving the problem is that "the cut shape of the opened bag is the front and back of the cut end. It is lacking in concreteness only with "a structure that makes a difference between and".

  In the embodiment of Patent Document 2, a general storage bag with a sealing chuck is provided with a notch, a front side cutting guide kerf for a plurality of bags, and a rear side cutting of a plurality of bags having different shapes. The one with an induction kerf is shown.

  In the example of Patent Document 2, a kerf of different shapes on the front and back surfaces are provided a plurality of respective (three in the figure), even in the provision of the kerf in this order any way, to form a kerf There is a problem that it costs.

The packaging bag described in Patent Document 3 is not particularly premised on the re-sealing means, but can be easily torn and opened, the opening line is beautiful, and the position of the opening line on the front and back surfaces is It is a packaging bag that can be easily opened by being different.

  In the packaging bag described in Patent Document 3, the inner layers of the laminated body are overlapped with each other, and one outer layer has a linear cut line extending from one outer edge and the other outer edge of the edge thermal bonding portion, and each linear shape. A first 'cut line comprising a curved cut line having at least one inflection point connecting the end of the cut line is provided, and the other outer layer is similarly formed of a straight cut line and a curved cut line. 1 "A packaging bag characterized in that a cut line is provided, and the positions of the inflection points of the curved cut lines on the front and back surfaces are different.

  In the packaging bag described in Patent Document 3, the meaning of the inflection point is unclear and the exact contents of the invention cannot be grasped. In short, the laminate on the front and back surfaces is straight-curved-straight (or straight-straight-straight). It is considered that the cut lines of the front and back surfaces are not matched.

  In the portion where the straight cut line transitions to the curve or vice versa, the tear is often removed and tends to deviate. This is presumably because the connecting elements are discontinuously viewed microscopically because the graphic elements are different between the straight line part and the curved line part. The tendency to deviate also changes depending on whether the package is opened from the right side or the left side.

  The packaging bag described in Patent Document 4 is made to solve the problem that the tear may easily deviate depending on the opening direction in the packaging bag described in Patent Document 3.

  The packaging bag described in Patent Document 4 is provided with a first score line on one outer layer of the packaging bag and a second score line on the other outer layer, and each score line has one outer edge of the edge bonding portion. The first cut line is the starting point and the other outer edge is the end point. The first cut line converges at the end point of the other straight line part by branching from the straight line part penetrating the left and right side edge parts and the end point of one straight line part. The plurality of score lines are constituted by a score line that swells toward the upper end side and a score line that swells toward the lower end side.

  The packaging bag described in Patent Document 4 has a structure in which a once-divided cut line converges again into a single cut line. However, with such a structure, there is a problem that a tear easily runs in an unintended direction, particularly in a convergent portion.

Japanese Patent Laid-Open No. 2003-72775 JP 2003-104394 A JP 2005-289396 A JP 2012-96839 A

  The problem to be solved by the present invention is to solve each problem in the packaging bag described in the above-mentioned patent document, to provide a packaging bag having a stable opening property, a clean cut surface, and an excellent resealing property. It is what we propose.

As means for solving the above problems, the invention according to claim 1 is characterized in that the sealant layers of the surface laminate and the back laminate each having a sealant layer are opposed to each other, and the periphery is sealed. A re-sealing means, and an easy-opening means provided between the resealing means and the top seal portion, wherein the easy-opening means is provided on the surface laminate, It consists of a guide line, a front half-cut line a, a front half-cut line b, and a back half-cut line provided on the back laminate, and the front opening guide line starts from the outer edge of the left side seal part. It is a horizontal straight half-cut line that reaches the starting point (s) closer to the center of the packaging bag than the inner edge, and the surface half-cut line a is inclined upward from the starting point (s) and horizontally Half-cut line leading to the outer edge The front half-cut line b is a half-cut line that slopes down from the start point (s) and reaches the outer edge of the right side seal portion horizontally, and the back half-cut line is at the position of the start point (s). A packaging bag characterized by being a horizontal straight half-cut line passing through a corresponding point on the back laminate and connecting the outer edges of the left and right side seal portions.

  Since the packaging bag which concerns on this invention has the linear back surface half cut line provided in the back surface laminated body, and two upper and lower surface half cut lines provided in the surface laminated body, the tear at the time of opening is two After reaching one of the surface half-cut lines with certainty, it proceeds linearly along one of the surface half-cut lines. Accordingly, unsuccessful opening is unlikely. In addition, a step is generated at the cut surface of the laminate on the front and back surfaces, regardless of which of the front half-cut lines is split.

  Further, since the surface half-cut line has no convergence and has many straight portions, it is excellent in unsealing property and no unsealing error caused by the convergence of the half-cut line occurs.

  The invention according to claim 2 is the packaging bag according to claim 1, wherein the surface half-cut line a and the surface half-cut line b are discontinuous half-cut lines.

  The packaging bag according to the present invention includes, as an easy-opening means, a surface opening induction line provided on the surface laminate, a surface half-cut line a and a surface half-cut line b, and a back half-cut line provided on the back laminate. The surface opening guide line is a horizontal straight half-cut line starting from the outer edge of the left side seal portion and starting from the inner edge of the left side seal portion to the starting point (s) closer to the center of the packaging bag. The cut line a is a straight half-cut line diagonally up from the start point (s) and horizontally reaches the outer edge of the right side seal part, and the surface half-cut line b is inclined down from the start point (s). It is a straight half-cut line that reaches the outer edge of the right side seal part horizontally, and the back half-cut line passes the point on the back laminate corresponding to the position of the starting point (s) and connects the outer edges of the left and right side seal parts. Horizontal straight half Tsu is a bet line. For this reason, the tear of the laminated body which started from the left side seal part proceeds in a straight line, and it is difficult to cause an unsuccessful opening due to the tearing of the tear, and the tear can be reliably opened.

  Moreover, since the packaging bag which concerns on this invention has the linear back surface half cut line provided in the back surface laminated body, and the two surface half cut lines provided in the surface laminated body, in which of the surface half cut line at the time of opening Even when the tear runs, there is a step at the cut surface of the laminate on the front and back surfaces.

  Further, since the surface half-cut line has no branching or convergence, there is no unsealing error caused by the branch point such that the tear is removed from the branch point of the half-cut line.

  In the packaging bag according to the present invention, the front surface opening guide line and the back half-cut line function as an opening start portion, so that an easy opening portion such as a V notch is not required. Therefore, notch chips are not generated unlike the V-shaped or U-shaped notches, and the problem of mixing of scraps is eliminated. Also, you don't cut your finger at the corner of the notch.

In the invention according to claim 2, when the surface half-cut line a and the surface half-cut line b are discontinuous half-cut lines, the tear resistance at the time of opening increases. If the tear resistance is too small, it may be opened at once when it is opened and the contents may be scattered, but such a problem does not occur.

FIG. 1 is a schematic plan view showing an embodiment of a packaging bag according to the present invention. FIG. 2 is a schematic plan view of the packaging bag shown in FIG. FIG. 3 is a schematic plan view showing a state where the packaging bag of FIG. 1 is opened. FIG. 4 is a schematic plan view showing a case where the packaging bag of FIG. 1 is opened in a different state. FIG. 5 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention.

Hereinafter, the packaging bag according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of the packaging bag (1) according to the present invention, and FIG. 2 is a schematic plan view showing the packaging bag as viewed from the back side. 3 and 4 are schematic plan views showing a state where the packaging bag shown in FIG. 1 is opened.

  In the packaging bag (1) according to the present invention, the sealant layers of the surface laminate (2) having the sealant layer and the back laminate (3) having the sealant layer are opposed to each other, and the peripheral edge, that is, the left side seal portion (4 ), The right side seal part (5), the bottom seal part (6), and the top seal part (7). The bottom seal portion (6) is often sealed after filling the contents.

  The packaging bag (1) according to the present invention has a resealing means (13) in the opening, and an easy opening means is provided between the resealing means (13) and the top seal part (7). It is a packaging bag, and the easy-opening means includes a surface opening guide line (12), a surface half-cut line a (8a), and a surface half-cut line b (8b) provided on the surface laminate (2). It consists of a back half-cut line (9) provided on the back laminate (3).

  The surface opening guide line (12) is a horizontal straight half-cut line starting from the outer edge of the left side seal part (4) and reaching the start point (s) closer to the center of the packaging bag than the inner edge of the left side seal part.

  The surface half-cut line a (8a) is a half-cut line that extends obliquely from the start point (s) and reaches the outer edge of the right side seal portion (5) horizontally, and the surface half-cut line b (8b) is the start point (s ) Is a half-cut line that slopes downward from the right side seal portion (5) to the outer edge.

  The back half-cut line (9) is a horizontal straight half-cut line passing through a point on the back laminate corresponding to the position of the start point (s) and connecting the outer edges of the left and right side seal portions.

  In the embodiment shown in FIGS. 1 and 2, the surface half-cut line a (8a) and the surface half-cut line b (8b) are closer to the center of the packaging bag than the inner edge of the left side seal part (4) (s ) With the outer edge of the right side seal part (5) as the end point. The left and right are not particularly significant, and there is no change even if the left and right are reversed.

The position of the starting point (s) is not particularly limited and may be any position as long as it is close to the center of the packaging bag from the inner edge of the left side seal portion (4). About 10 mm is appropriate. If it is too close, the tolerance for positional deviation is reduced, and if it is too large, the width of the stepped portion in the opening is reduced.

  Since the back half-cut line (9) is provided so as to pass through a point on the back laminate (3) corresponding to the start point (s), it is at the same position as the front surface opening guide line (12). Therefore, the tear of the back surface laminate (3) starting from the outer edge of the left side seal part surely proceeds along the back surface half-cut line. Moreover, the tear of the surface laminate (2) proceeds along the surface opening guide line (12), and at the start point (s), either the surface half-cut line a (8a) or the surface half-cut line b (8b) Proceed along. In the example shown in FIG. 3, the case where the tear of the surface laminate (2) is opened along the surface half-cut line b (8b) is shown. Moreover, in FIG. 4, the case where the tear of the surface laminated body (2) is opened along the surface half cut line a (8a) is shown.

  In the packaging bag (1) according to the present invention, if the two front half-cut lines are arranged vertically symmetrically about the back half-cut line, the tear of the surface laminate at the time of opening runs to any half-cut line. Even in this case, the step difference from the back half-cut line can be made equal.

  Which of the two surface half-cut lines (8a, 8b) runs depends on the difference between the right-handed hand, whether you pull the top seal part toward you at the start of cutting, or push it to the back, Even if the packaging bag according to the present invention is opened in any way, a step is generated, so that anyone can use it with peace of mind.

  In the packaging bag (1) according to the present invention, the front opening guide line (12) and the back half-cut line (9) are provided at positions where the front and back sides coincide with each other on the outer edge of the left side seal part (4). , Easy opening processing such as I notch is not required, but these easy opening processing portions may be further provided.

  In the left side seal portion, the tear proceeds integrally with the front and back, so the tear in the surface laminate (2) is guided near the start point (s) of the surface half-cut line. The tear of the surface laminate guided near the start point proceeds along either the surface half-cut line a (8a) or the surface half-cut line b (8b).

FIG. 5 is a partially enlarged view showing another embodiment of the packaging bag (1) according to the present invention.
The surface half-cut line a (8a) and the surface half-cut line b (8b) may be composed of discontinuous half-cut lines as shown in FIG. Since the discontinuous half-cut line has a larger resistance at the time of opening than the continuous half-cut line, it can be used in appropriate combination when the resistance is too small and the usability is poor.

  A half-cut line is generally formed by a die cutter or a laser.

  As the resealing means (13), a synthetic resin fastener in which a belt-like protrusion and a belt-like groove are fitted is most common, but an adhesive seal may be used.

  For the surface laminate (2) and the back laminate (3), a soft packaging film generally used for packaging bags can be used. As a layer structure, a combination of a base material layer / intermediate layer / sealant layer is common.

Since the substrate layer often involves printing, a biaxially stretched film such as a biaxially stretched polyethylene terephthalate (PET) film, a biaxially stretched polypropylene (PP) film, or a biaxially stretched nylon film is used.

  As the intermediate layer, various barrier films and aluminum foil are used. Examples of the barrier film include a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film and the like, a PET film and the like such as aluminum. A metal vapor-deposited film obtained by vapor-depositing a metal, an inorganic oxide vapor-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET film, or the like is used.

  As the sealant layer, a polyolefin resin is generally used, and specifically, a low density polyethylene resin, a medium density polyethylene resin, a linear low density polyethylene resin, an ethylene-vinyl acetate copolymer, an ethylene-α olefin. Copolymers, ethylene resins such as ethylene-methacrylic acid resin copolymers, blend resins of polyethylene and polybutene, homopolypropylene resins, propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene- Polypropylene resins such as α-olefin copolymers are used.

  The front half-cut line (8a, 8b), the back half-cut line (9), and the opening guide line (12) need to be cut with at least a sealant layer, and preferably only the base material layer is cut. Or, it is desirable to stop halfway through the intermediate layer.

  As a procedure for producing a packaging bag according to the present invention, first, an intermediate layer, a sealant layer, and the like are bonded to a printed base film, and then a half cut line is formed while aligning with a printed pattern. The half-cut line may be formed before slitting to a predetermined width or after slitting. In addition, when forming a half cut line by a laser, it is also possible to form it at the end when bag making is completed.

  Next, the sealant layers on the front and back surfaces are opposed to each other, and, for example, a fastener tape serving as a resealing means (13) is sandwiched and adhered, and a side seal portion and a top seal portion (7) are formed.

  After the side seal portion is cut and trimmed and divided into individual bags, an easy-open processing portion (11) is formed as necessary. The bottom seal portion (7) is left unsealed and used as a filling opening.

  As the shape of the packaging bag (1), an example of a four-sided bag is shown in the figure. However, the shape is not limited to this, and a three-sided sealing bag or a standing pouch shape to which a bottom tape is added may be used. However, it is necessary to consider in advance how to provide the filling opening for filling the contents.

  As described above, the packaging bag (1) according to the present invention is a packaging bag having a stable opening property, a clean cut surface, and an excellent resealing property, and therefore needs to be resealed. It can be widely used for various applications.

DESCRIPTION OF SYMBOLS 1 ... Packaging bag 2 ... Front surface laminated body 3 ... Back surface laminated body 4 ... Left side seal part 5 ... Right side seal part 6 ... Bottom seal part 7 ... Top seal part 8a ... Surface half-cut line a
8b ... Surface half-cut line b
9 ... back half cut line 12 ... front surface opening guide line 13 ... resealing means s ... starting point

Claims (2)

Each of the surface laminate and the back laminate, each having a sealant layer, has the sealant layers facing each other and sealed at the periphery, and has a resealing means at the opening, between the resealing means and the top seal part. A packaging bag provided with easy-opening means,
The easy-opening means comprises a surface opening induction line provided on the surface laminate, a surface half-cut line a and a surface half-cut line b, and a back half-cut line provided on the back laminate,
The surface opening guide line is a horizontal straight half-cut line starting from the outer edge of the left side seal part and reaching the starting point (s) closer to the center of the packaging bag than the inner edge of the left side seal part,
The surface half-cut line a is a half-cut line that obliquely rises from the start point (s) and reaches the outer edge of the right side seal portion horizontally, and the surface half-cut line b is inclined downward from the start point (s). Is a half cut line that reaches the outer edge of the right side seal part horizontally,
The back surface half-cut line is a horizontal straight half-cut line that passes through a point on the back surface laminate corresponding to the position of the start point (s) and connects the outer edges of the left and right side seal portions. bag.   The packaging bag according to claim 1, wherein the surface half-cut line a and the surface half-cut line b are discontinuous half-cut lines.