JP2016068994A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag which has an excellent openability and of which wrong opening can be prevented.SOLUTION: A packaging bag 10 is equipped with a first face 12 and a second face 14 which face each other. The first face 12 is configured from a first sheet piece 16 which extends from one end of the first face 12 towards the other end side in a first direction, and a second sheet piece 18 which extends from the other end of the first face 12 towards one end side, and is so detachably bonded to the first sheet piece 16 as to cover a part of an external surface of the first sheet piece 16. Two or more breakage scheduled lines 26, which are broken by a user when opening, are formed on the second sheet piece 18, and each breakage scheduled line 26 extends from an edge on said one end side of the second sheet piece 18 to a position beyond an edge on the other end side of the first sheet piece 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag having a first surface and a second surface facing each other.

  2. Description of the Related Art Conventionally, packaging bags formed by laminating sheet bodies have been widely used as packaging bodies for packaging contents. As an example of such a packaging bag, a so-called pillow bag in which the upper edge portion, lower edge portion and back surface portion of the bag are heat-sealed, or two sheets are fused and welded, and then the lower edge portion and the upper edge portion are attached. Examples include joined flat bags. Examples of the contents contained in such a packaging bag include groceries such as confectionery, toiletries, daily necessities such as name labels, and medical and medical related products such as gauze, poultice, and masks. For such a packaging bag, many techniques have been proposed in the past for simplifying the opening operation and for resealing the opened packaging bag.

  For example, Patent Document 1 discloses a packaging bag provided with a cover portion that extends from an outer surface of a bag body and covers an open portion of the bag body. An adhesive layer for adhesion to the bag body is formed on the cover portion, and an openable / closable chuck is provided on the open portion. When such a packaging bag is resealed, the cover part and the sealing piece peeled off from the bag main body may be reattached to the bag main body, or the chuck provided on the bag main body may be closed. However, since the techniques of Patent Documents 1 and 2 have excellent resealability, there is a problem that it is difficult to leave a trace even if there is an unauthorized opening.

JP 11-29155 A JP 2011-126571 A JP-A-10-167355

  In Patent Document 3, as a packaging bag for storing a wet tissue, a bonding portion in which two sheets are bonded together is provided, and in this bonding portion, an opening for taking out contents is formed in an inner sheet, and an outer side is formed. A packaging bag in which an opening piece covering the opening is formed is disclosed. In patent document 3, when opening a packaging bag, an outer sheet | seat should be fractured | ruptured along a perforation etc., and an opening piece may be peeled from an inner sheet | seat, and opening may be exposed outside. Moreover, what is necessary is just to stick an opening piece to an inner sheet | seat again when it wants to reseal. According to the technique of this Patent Document 3, an irreversible change of sheet breakage occurs, so that the trace of unauthorized opening remains, and unauthorized opening can be found to some extent.

  However, the technique of Patent Document 3 requires a process of forming an opening in the sheet, and there is a problem that the manufacturing process becomes complicated. Moreover, since patent document 3 is a packaging bag which accommodates a wet tissue, in order to prevent drying, after resealing, an opening must be completely covered with the opening piece. Therefore, an adhesive layer is formed on almost the entire surface of the unsealed piece, and almost the entire surface of the unsealed piece can be reattached to the inner sheet. In this case, if the unsealed piece is reattached at substantially the same position as before opening, it becomes difficult to determine whether or not the sheet has been broken along the perforation, and thus whether or not the opening has been completed. As a result, even if there is an unauthorized opening, it is difficult for the user to notice. Such a characteristic that it is difficult to understand the trace of unauthorized opening is a big problem in packaging bags for foodstuffs and pharmaceutical / medical products where hygiene is important.

  Then, an object of this invention is to provide the packaging bag which can prevent unauthorized opening, while having the outstanding opening property.

  The packaging bag of the present invention is a packaging bag having a first surface and a second surface facing each other, and the first surface extends from one end of the first surface in the first direction toward the other end. The first sheet piece extends from the other end of the first surface toward the one end side, and is detachably attached to the first sheet piece so as to cover a part of the outer surface of the first sheet piece. The second sheet piece is formed with two or more planned break lines that are broken by the user when opened, and each of the planned break lines is formed by the second sheet piece. It extends from the end side on the one end side to a position exceeding the end side on the other end side of the first sheet piece.

  In a preferred embodiment, the second sheet piece is stuck to the first sheet piece in a non-peelable manner at a position avoiding a band-like portion sandwiched between two planned break lines. In another preferred aspect, the packaging bag is configured by folding one sheet so that both ends thereof overlap, and the first sheet piece and the second sheet piece are formed of the one sheet. It is a part.

  According to the present invention, the opening portion can be easily obtained by peeling the strip-like portion sandwiched between two planned break lines from the first sheet piece, and the peeled strip-like portion is re-applied to the first sheet piece. By wearing it, it can be easily resealed. Moreover, according to this invention, when opening a packaging bag for the first time, the 2nd sheet piece must be always ruptured along a rupture plan line, and the trace of opening can be left reliably. Therefore, the packaging bag of the present invention can prevent unauthorized opening while having excellent opening properties.

It is a schematic front view of the packaging bag which is embodiment of this invention. It is a schematic front view of the opened packaging bag. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is an expanded view of a packaging bag. It is a schematic front view of the other packaging bag before opening and after opening. It is a schematic front view of the other packaging bag before opening and after opening. It is a schematic front view of the other packaging bag before opening and after opening.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of a packaging bag 10 according to an embodiment of the present invention. FIG. 2 is a schematic front view of the opened packaging bag 10. 3 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. Further, FIG. 5 is a development view of the packaging bag 10. In the drawings, various dimensions are partly different from actual ones for easy viewing.

  The packaging bag 10 of the present embodiment is a flat bag having a first surface 12 and a second surface 14 facing each other. The packaging bag 10 is a packaging bag for housing a relatively flat solid material such as a gauze, a compress, a name label, a mask, or the like. However, the contents of the packaging bag 10 are not limited to this, and the packaging bag 10 can accommodate various contents by appropriately changing the shape and size thereof. Moreover, although the content to be accommodated is desirably a plurality, it may be singular. The packaging bag 10 is configured by bending a single sheet 11 (see FIG. 5) and joining a part thereof. More specifically, the packaging bag 10 is configured such that a sheet 11 is folded along a crease line 13 so that both ends thereof are overlapped to form a tubular body, and then the upper and lower ends of the tubular body are formed. The overlapping sheets 11 are joined together. The joint portions at the upper end and the lower end are an upper edge seal portion 22t and a lower edge seal portion 22b, respectively.

  The material of the sheet 11 can be appropriately changed according to the type of contents, cost, and the like, but the sheet 11 may have basic mechanical characteristics as a package, such as impact resistance and wear resistance. Required. Moreover, the sheet | seat 11 is also requested | required of heat-sealing property on account of manufacture. In the present embodiment, the sheet 11 is a multilayer sheet in which at least a sealant film that imparts heat sealability and a thermoplastic film that imparts basic mechanical properties as a package are laminated. When high gas barrier properties are required, the sheet 11 may further have a barrier layer.

  The sealant film includes low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer. Examples thereof include stretched or unstretched films composed of heat-sealable thermoplastic resins such as a polymer (EAA), an ethylene-methacrylic acid copolymer (EMAA), and an ethylene-vinyl acetate copolymer (EVA).

  Examples of the thermoplastic film include polyester resins (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin resins (polyethylene (PE), polypropylene). (PP) etc.), polyamide resins (nylon-6, nylon-66 etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA) ), A stretched or unstretched film of one layer or two or more layers composed of a thermoplastic resin such as polyethersulfone (PES) and ethylene-vinyl alcohol copolymer (EVOH).

  As a barrier layer (for example, a layer having a gas barrier property or a light barrier property), a metal thin film such as aluminum, a resin film such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or an arbitrary synthesis A film obtained by evaporating (or sputtering) a metal such as aluminum or an inorganic oxide such as aluminum oxide or silica on the resin film can be exemplified. Moreover, instead of using a vapor deposition film, you may vapor-deposit a metal, an inorganic compound, etc. directly on a sealant film or a thermoplastic film. Moreover, you may provide the printing layer for displaying the name, description, and design regarding articles | goods etc. in a sheet | seat body as needed.

  Here, one sheet 11 constituting the packaging bag 10 comprises three sheet pieces, that is, a first sheet piece 16 and a second sheet piece 18 constituting the first surface 12, and a second surface 14. The third sheet piece 20 can be divided. The third sheet piece 20 is a sheet piece constituting the entire surface of the second surface 14. In other words, the second surface 14 of the packaging bag 10 is composed of a single continuous surface that is seamless.

  On the other hand, the first surface 12 is formed from two sheet pieces that are shifted in the width direction of the packaging bag 10 (left and right direction in FIGS. 1 and 2), that is, from the first sheet piece 16 and the second sheet piece 18. It is configured. The first sheet piece 16 extends from one end in the width direction of the first surface 12 (left end in FIGS. 1 and 2) toward the other end side (right end side). The second sheet piece 18 extends from the other end (right end) of the first surface 12 toward one end side (left end side).

  Hereinafter, of the first sheet piece 16 and the second sheet piece 18, an end portion connected to the second surface 14 is referred to as a “base end”, and an end portion located in the middle of the first surface 12 is referred to as a “lead end”. . Therefore, in the first sheet piece 16, the left end is the base end, and the right end is the tip. In the second sheet piece 18, the right end is the base end, and the left end is the tip.

  The second sheet piece 18 extends to a position beyond the tip side of the first sheet piece 16, and a part of the second sheet piece 18 covers a part of the outer surface of the first sheet piece 16. As a result, the front side of the first sheet piece 16 is hidden on the first surface 12 before the packaging bag 10 is opened (the state shown in FIG. 1), but the front side of the second sheet piece 18 is exposed to the outside. doing.

  The 2nd sheet piece 18 is stuck to the 1st sheet piece 16 so that peeling is possible. For this sticking, an adhesive surface 24 is formed in the inner surface of the second sheet piece 18 in the vicinity of the tip side of the second sheet piece 18. The adhesive surface 24 is formed by applying an adhesive to the inner surface of the second sheet piece 18 or attaching a double-sided adhesive tape. The bonding surface 24 is positioned in parallel with the right end side with a slight gap between the second sheet piece 18 and the front end side. The slight gap portion 25 between the adhesive surface 24 and the right end side becomes a knob portion to be picked by the user when the second sheet piece 18 is broken. The adhesive surface 24 is not particularly limited as long as it can be repeatedly attached to and peeled from the first sheet piece 16, and may be composed of, for example, a pressure-sensitive adhesive. If the first sheet piece 16 and the second sheet piece 18 can be detachably attached, the adhesive surface 24 is formed not on the second sheet piece 18 but on the first sheet piece 16 as shown in FIG. May be.

  A point seal that welds the second sheet piece 18 and the first sheet piece 16 so as not to be peeled off at the upper and lower ends of the second sheet piece 18, that is, a position avoiding a belt-like portion 28 to be described later in the second sheet piece 18. Ps is given. By providing this point seal Ps, the entire second sheet piece 18 is prevented from peeling off from the first sheet piece 16.

  A pair of planned break lines 26 are formed in the second sheet piece 18. The planned break line 26 is a line for breaking the sheet 11 without using a blade or the like. For example, a perforation line in which a plurality of cuts are arranged at intervals, or a half cut line that is a groove line thinner than the thickness of the sheet 11 Etc. In the present embodiment, two planned break lines 26 are formed at intervals in the vertical direction. As a result, the second sheet piece 18 has a belt-like portion 28 sandwiched between the two planned break lines 26. Each planned break line 26 extends from the front end side of the second sheet piece 18 to the base end side (the right end side of the first surface 12) of the second sheet piece 18. In other words, the planned fracture line 26 extends from the leading edge of the second sheet piece 18 to a position exceeding the leading edge of the first sheet piece 16.

  Each planned break line 26 is formed with a break start end 30 that is a break start line along the planned break line 26. The break start end 30 is a linear cut formed on the planned break line 26 or a substantially triangular cut (notch) formed on the planned break line 26. The size of the break start end 30 is not particularly limited, but it is desirable that the break start end 30 extends to a position beyond the bonding surface 24.

  When the packaging bag 10 is opened, the end of the band-shaped portion 28 sandwiched between the pair of planned break lines 26 is picked with a finger, and the band-shaped portion 28 is pulled away from the first surface. In response to this pulling force, the first sheet piece is broken along the planned break line 26 and the strip 28 is peeled off from the first sheet piece 16. Then, finally, as shown in FIGS. 2 and 4, the belt-like portion 28 is opened with respect to the second sheet piece 18, and the leading edge of the first sheet piece 16 is exposed. Here, since the first sheet piece 16 does not extend from the middle of the first surface 12, when a part of the second sheet piece 18 is turned, an opening 32 communicating with the inside of the packaging bag 10 is formed. Is done. A thick line in FIG. 2 indicates the boundary of the opening 32. The user takes out the contents stored in the packaging bag 10 from the opening 32.

  When the packaging bag 10 once opened is to be sealed again, the strip-shaped portion 28 peeled off from the first sheet piece 16 may be attached to the first sheet piece 16 again. Since the second sheet piece 18 including the belt-like portion 28 has an adhesive surface 24 that can be repeatedly peeled and stuck, this re-sticking can be performed very easily. By reattaching the belt-like portion 28 to the first sheet piece 16, the tip side of the first sheet piece 16 is hidden again, and the opening 32 is closed. This effectively prevents unintentional outflow of the contents and mixing of foreign matters into the packaging bag 10. Such a configuration can be said to be particularly suitable for the packaging bag 10 containing a plurality of products.

  Moreover, in this embodiment, the width | variety of the opening opening 32 is made smaller than the height of the packaging bag 10, and the shoulder part 33 (refer FIG. 2) covered with the sheet | seat body is formed in the both sides of the opening opening 32. FIG. . In the case of such a configuration in which the shoulder portion 33 is provided, a soft sheet-like product such as a name label, cut cotton, or mask can be easily taken out. That is, such a soft sheet-like product is usually accommodated in the packaging bag 10 in a state where a plurality of sheets are laminated. When an attempt is made to take out a desired number of sheet-like products from the packaging bag 10, not only the sheet-like product to be taken out but also other overlapping sheet-like products may be entangled and jump out of the packaging bag 10. However, if the shoulder portions 33 are provided on both sides of the opening 32 as in the present embodiment, the sheet-like product that is about to jump out is caught on the shoulder portion 33 and is prevented from being detached from the packaging bag 10. . On the other hand, since the sheet-like product to be taken out is pulled with a strong force by the user, even if the sheet-like product is caught on the shoulder portion 33, the sheet-like product can be flexibly deformed and come out of the opening opening 32. As a result, only a desired number of sheet-like products can be reliably taken out.

  As is apparent from the above description, according to the present embodiment, the packaging bag 10 can be easily removed without using a blade or the like by an extremely simple operation of turning a part of the second sheet piece 18 (the band-shaped portion 28). Can be opened. Moreover, after opening, it can be easily resealed by sticking a part of the turned sheet piece (band-like part 28) to the first sheet piece 16 again. Furthermore, according to this embodiment, when opening for the first time, the trace of the opening can be left clearly. In other words, in the present embodiment, the second sheet piece 18 must be broken along the planned breaking line 26 when opening for the first time. This break is an irreversible change and cannot be reversed. Moreover, since the breakage is performed over a relatively long distance, the presence or absence of the breakage can be easily confirmed visually. In particular, in the present embodiment, the bonding surface 24 is formed only on a part of the belt-like portion 28. Therefore, a portion of the belt-like portion 28 where the adhesive surface 24 is not formed is lifted from the first sheet piece 16, so that the trace of breakage can be clearly seen. As a result, if there is an illegal opening (opening that is not intended by the user), the user can immediately notice. As a result, the safety of the product can be further increased. It is particularly important to leave such traces of unauthorized opening in products where hygiene is important, such as food and pharmaceutical / medical-related products.

  Here, conventionally, it has also been proposed to attach a fastener to the packaging bag 10 in order to enable resealing. While such fasteners provide excellent resealability, they are costly and complicated to manufacture. On the other hand, the packaging bag 10 of this embodiment is formed with a very simple configuration in which a single sheet 11 partially formed with a planned fracture line 26 is folded and pasted. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

  Further, according to the present embodiment, the number and size of the opening 32 can be freely adjusted regardless of the size of the packaging bag 10. That is, in many of the conventional packaging bags 10, the opening 10 is often formed by cutting the packaging bag 10 in the vertical direction from the upper and lower ends or in the horizontal direction from the left and right ends. In this case, the opening opening 32 obtained depends on the vertical length or the horizontal length of the packaging bag 10. Further, the number of opening openings 32 obtained is always only one, and the position of the opening opening 32 is limited to the end of the packaging bag 10.

  On the other hand, in the present embodiment, by adjusting the arrangement of the first sheet piece 16 and the second sheet piece 18 and the arrangement and number of the planned breaking lines 26, the size, number, and position of the opening 32 can be freely set. Can be adjusted.

  For example, as shown in FIG. 6, the leading edge of the first sheet piece 16 is positioned at the center in the width direction of the first surface 12, and the expected break line 26 is moved from the leading edge of the second sheet piece 18 to the first sheet. The line 16 may extend to a position slightly beyond the tip side of the piece 16 (that is, near the center of the first surface 12 in the width direction). In this case, in order to open the packaging bag 10, the second sheet piece 18 is broken along the planned break line 26, and the strip portion 28 is peeled off from the first sheet piece 16. An opening opening 32 that is long in the vertical direction is formed at the center position.

  Further, the length in the width direction of the opening 32 is defined by the distance from the distal end side of the first sheet piece 16 to the proximal end of the planned fracture line 26 (the proximal end of the band-shaped portion 28). Therefore, as shown in FIG. 7, the first sheet piece 16 is brought closer to the left end of the first surface 12, and the base end of the planned fracture line 26 is brought closer to the right end of the first surface, If the distance from the distal end side of 16 to the base end of the planned fracture line 26 is increased, a very large opening is obtained.

  Moreover, as long as the planned break line 26 is 2 or more, a larger number may be formed. For example, as shown in FIG. 8, a pair of planned break lines 26a lined up at a relatively narrow interval and a pair of planned break lines 26b lined up at a relatively wide distance are formed, and a narrow first belt-like portion 28a and a wide You may provide the 2nd strip | belt-shaped part 28b. In this case, when the user wants a relatively small opening, the user can turn the first band 28a. When the user wants a relatively large opening, the user can turn the second band 28b. In this case, in the second sheet piece 18, the portion between the first belt-like portion 28 a and the second belt-like portion 28 b may be stuck to the first sheet piece 16 so as not to be peeled off, and may not be turned up.

  Moreover, in this embodiment, although the packaging bag 10 is comprised from the sheet | seat 11 of one sheet, the packaging bag 10 may be comprised from several sheets. For example, the packaging bag 10 may be composed of a total of three sheets, two sheets constituting the first surface 12 and one sheet constituting the second surface 14. Moreover, in this embodiment, although the packaging bag 10 is made into the flat bag which does not have a gusset (gusset), if the packaging bag 10 has the 1st surface 12 and the 2nd surface 14, side gusset or bottom You may have a gusset.

  DESCRIPTION OF SYMBOLS 10 Packaging bag, 11 sheet, 12 1st surface, 14 2nd surface, 16 1st sheet piece, 18 2nd sheet piece, 20 3rd sheet piece, 22b Lower edge seal part, 22t Upper edge seal part, 24 Adhesive surface , 26 Planned break line, 28 Band-shaped part, 30 Break start end, 32 Opening opening.

Claims (3)

A packaging bag having a first surface and a second surface facing each other,
The first surface is
A first sheet piece extending from one end of the first surface in the first direction toward the other end;
A second sheet piece that extends from the other end of the first surface toward the one end side and is releasably attached to the first sheet piece so as to cover a part of the outer surface of the first sheet piece;
Consists of
In the second sheet piece, two or more planned break lines to be broken by the user at the time of opening are formed,
Each planned break line extends from the edge on the one end side of the second sheet piece to a position exceeding the edge on the other end side of the first sheet piece,
A packaging bag characterized by that. The packaging bag according to claim 1,
The second sheet piece is affixed to the first sheet piece so as not to be peeled at a position avoiding a band-shaped portion sandwiched between two planned break lines.
A packaging bag characterized by that. The packaging bag according to claim 1 or 2,
The packaging bag is configured by folding a single sheet so that both ends thereof overlap,
The first sheet piece and the second sheet piece are part of one sheet,
A packaging bag characterized by that.