JP6899421B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag in which films are joined together to form a mating portion that is sealed along the depth direction.

In the bag made of film, as a bag that can be easily opened by tearing the edge, for example, a so-called gusset that can contain the contents of a square such as a box like the packaging bag 100 shown in FIG. Pillow) type bags are known.

In this gusset type packaging bag 100, the central region along the depth X direction is a so-called gassho-bonded mating portion 101 in which the back surfaces of films extending from both width directions are laminated. It is sealed by heat fusion, and its tip 101a is bent inward so as to be in contact with the outer surface of the packaging bag 100.

Further, both end regions 102 along the width direction of the packaging bag 100 are also sealed by heat fusion as in the mating portion 101. More specifically, a pair of folding portions 103 are formed by being folded inward from both side ends along the depth direction, and after the contents are packed, the folding portions 103 and the folding portion 102 are folded in both end regions 102 along the width direction. All of the parts other than the portion 103 are sealed with the back surfaces of the films combined.

In this gusset type packaging bag 100, a notch 104 is formed in at least one of both end regions 102 along the width direction to facilitate opening. However, if the notch is simply formed, the tear may reach the fold portion in the sealed area at the time of opening, and the opening may fail.

As a proposal that can avoid this, for example, in Patent Document 1, in the mating portion along the depth direction, a notch is formed at a position close to one end region along the width direction, and heat fusion of the one end region is formed from this notch. It forms cut lines extending on both sides of the worn part. Further, in Patent Document 2, a fine scratch is provided at a position corresponding to the edge of the content.

Further, in Patent Document 3, an opening start point is provided between the mating portion and the folding portion at the edge along the width direction, and the opening start point is close to the opening start point (the side that does not straddle the mating portion). A guide line is attached between the edge and the edge along the depth direction to assist the opening intermittently along the depth direction.

On the other hand, Patent Document 4 proposes to provide an inclined perforation along the opening direction in a so-called three-sided bag type in which films are overlapped and the periphery thereof is heat-sealed.

Further, there is known a so-called gassho bag type packaging bag, which has a general structural difference from the above-mentioned packaging bag 100 in that there is no folding portion.

Japanese Unexamined Patent Publication No. 2001-31114 Japanese Unexamined Patent Publication No. 7-132966 Japanese Unexamined Patent Publication No. 2014-61942 Japanese Unexamined Patent Publication No. 10-147347

In the proposal of Patent Document 1, it is necessary to accurately align the notch and the cut line, and when packing the contents, it is necessary to manage the packing position so as to match the position of the notch and the like, and the manufacturing process. Will put a heavy load on. In the first place, when packing the contents, there is a problem that the position cannot be controlled depending on the bag making machine, and the applicable cases are limited.

In the proposal of Patent Document 2, it is difficult to control how to make scratches, and even if the bags are the same product, the scratches become deeper or shallower, and the bag can be opened even though the same product is used. And there was a risk that the strength would be different. Further, in order to facilitate tearing, it is necessary to provide scratches over a wide area, which results in a large processing cost.

In the proposal of Patent Document 3, since the package is opened only by the guide wire attached intermittently, there is a concern that a strong force is required to tear the packaging bag in the depth direction along the guide wire, and the content is small. There was a risk that the opening would become smaller and the contents could not be taken out.

In addition, the proposal assumes that if the content is large, it will be opened by hitting it and the rift will move to the guide line on the edge side in the depth direction. In short, there was a risk that it would be difficult to tear. That is, in the packaging bag, the depth direction is the film flow direction at the time of manufacture, and the polymers constituting the film are lined up in this direction. However, since the opening direction assumed here is a direction perpendicular to this, a strong force is required to tear it, and there is a concern that smooth opening will be difficult.

Furthermore, since the package is opened by intermittent guide wires, the opening direction may deviate in the gap between the guide wires (the part where the guide wires are not covered), and the opening may be completed halfway. It was difficult to open the package smoothly in a straight line. As a result, in order to tear smoothly, the width of the guide line formation area should be widened by a shape with a return such as a V-shape or a V-shape, and the number of layers in the width direction of the packaging bag should be increased. (See Fig. 2 and the like in the same document), and there is a problem that the processing cost increases.

On the other hand, since the proposal of Patent Document 4 is for a three-sided bag type, unlike a gusset type bag, it is not assumed that the bag is accidentally torn at the folding portion, and the perforated mode in this proposal is immediately gusseted. Not applicable to type bags.

In addition, packaging bags without folds, such as the so-called gassho bag type, do not fail to open like the gusset type, but the bag may be torn and scraps may be generated, and there is a proposal to avoid this. It was desired.

A first object of the present invention is to provide a packaging bag that can be applied to a wide range of bag making machines by simple processing and can be easily opened without tearing the folded portion while suppressing the influence on the strength of the bag. It is in.

A second object of the present invention is to make it possible to adjust a packaging bag having no folding portion so as not to generate scraps due to opening.

<1> A packaging bag made of film, in which films are combined on one side surface or one flat surface to form a mating portion to be sealed along the depth direction, and opening is started at one end edge along the width direction. A point is provided, and a wavy guide line is provided in the vicinity of one side end along the depth direction from the opening start point, along the depth direction to the other end edge along the width direction, and the front and back of the outer surface of the bag. It is a packaging bag characterized by being attached to both sides.

<2> A pair of folding portions folded inward from both side ends along the depth direction are formed, and both the folding portion and the portion other than the folding portion are formed of the film in both ends along the width direction. A packaging bag in which the back surfaces are aligned and sealed, and the mating portion is a packaging bag in which films extending toward the center from both sides in the width direction are combined and sealed along the depth direction. The packaging bag according to <1>, wherein the opening start point is provided at any position between the position not touching the portion and the position not touching the folding portion.

<3> The packaging bag according to <1> or <2>, which is attached to the guide line at a distance of 20% or less with respect to the distance of the width of the bag from the side end.

<4> The guide wire is the packaging bag according to any one of <1> to <3>, which is attached by shifting the formation position on the front and back surfaces of the outer surface of the bag.

<5> The guide wire is attached so that the distance from the side end on one of the front and back surfaces of the bag is 50% or more and less than 100% with respect to the distance from the side end on the other side of the front and back surfaces. The packaging bag according to <4>.

<6> A second guide line formed from the opening start point toward one side end along the depth direction away from the one end edge along the width direction and connected to the guide line at the tip. The packaging bag according to any one of <1> to <5>, wherein the inclination angle with respect to the width direction is in the range of 10 ° to 80 °.

<7> The packaging bag according to <6>, wherein the second guide wire has a portion to which the inclination angle is 20 ° or more.

<8> The second guide wire is the packaging bag according to <6> or <7>, which is attached in a straight line or a polygonal line.

In the present invention, the "guide wire" means a scratch or a dent linearly provided on the outer surface of a film or sheet constituting the bag. By scraping a part in the thickness direction from the outer surface of the film or the like, these are made easier to tear than the corresponding part when a load is applied to the film or the like.

Further, the above-mentioned scratches or dents may be continuously provided at the time of formation, may be provided intermittently, or may be a combination thereof.

Further, the above-mentioned scratches or dents need only be visually determined to be substantially linear, and strictly speaking, the width thereof does not matter.

The packaging bag of the present invention has a guide wire formed so as to be separated from one end edge along the width direction from the opening start point of one end edge along the width direction toward one side end along the depth direction. , A sub-guide line connecting the tip of the guide line near one side end is attached along the depth direction.

With these guide lines, it is sufficient to process a part of the bag, and since it is not necessary to align the flow direction, it can be easily processed and there are no restrictions on the bag making machine to which it can be applied. Further, since the processing is performed on a part of the bag and it is easy to control the depth to a uniform depth, the influence on the strength of the bag can be suppressed to a small extent. On the other hand, since the bag can be torn along the guide wire and the sub guide wire attached by processing, the fold portion is not accidentally torn in the gusset type packaging bag.

As a result, the packaging bag of the present invention can be applied to a wide range of bag making machines by simple processing, firstly, the gusset type packaging bag can be easily applied without tearing the folded portion while suppressing the influence on the strength. Can be opened.

Secondly, the packaging bag of the present invention can tear the bag along the guide line and the sub-guide line by the above-described configuration, so that the packaging bag having no folding portion like the gassho bag type can be opened. It is possible to adjust so that the scraps are not generated due to.

FIG. 1A is a photograph of an example of a bag of the same type as the packaging bag of one form of the present invention, and FIG. 1B is a photograph of an edge along the width direction thereof. 2 (a) and 2 (b) are views schematically explaining a main part of the packaging bag of the present invention. 3 (a) to 3 (c) are diagrams showing examples in which the range to which the guide line of the present invention is attached is changed. FIG. 4 is a diagram schematically explaining a main part of an example in which the shape of the opening starting point of the packaging bag of the present invention is changed. FIG. 5 is a diagram schematically explaining a main part of an example in which a notch other than the opening starting point of the packaging bag of the present invention is made. 6 (a) to 6 (c) are diagrams showing examples in which the depth at which the guide line of the present invention is attached is changed. 7 (a) and 7 (b) are views explaining the action that can occur at the time of opening when the width of the packaging bag is narrow, FIG. 7 (c) is an example in which the shape of the guide line is changed, and FIG. 7 (d) is a guide. It is the figure which roughly explained each main part of the example which changed the angle of a line. FIG. 8 is a diagram schematically explaining a main part of another example in which the shape of the guide line is changed. 9 (a) and 9 (b) are diagrams illustrating the effects that can occur at the time of opening when a gassho bag is applied as the packaging bag of the present invention. FIG. 10 (a) is a diagram schematically explaining an example in which the formation range of the guide line is changed on the front and back of the packaging bag in FIG. 9, and FIG. 10 (b) is a diagram explaining the action. FIG. 11 is a schematic configuration diagram of a bag of the same type as the conventional packaging bag of the present invention.

Embodiments of the present invention will be described in detail with reference to the drawings. In principle, all the drawings having the same function are given the same name or reference numeral, and the repeated explanation is omitted as much as possible. FIG. 1 (a) is a photograph of an example of a bag of the same type as the packaging bag of one form of the present invention, and FIG. 1 (b) is a photograph of an edge along the width direction thereof. (A) and (b) are diagrams schematically explaining the main parts of the packaging bag of the present invention.

The packaging bag of the present invention has the same basic configuration as the gusset type packaging bag 10 shown in FIGS. 1 (a) and 1 (b). The packaging bag 10 follows the direction of the mating portion (not shown in FIG. 1) and the width W sealed (sealed) by heat fusion, similarly to the conventional packaging bag 100 (see FIG. 11) described above. It has both end regions 12a and 12b, a folding portion 13, and a notch 14 as an opening start point.

In the present invention, as shown in FIG. 2A, the outer surface of the packaging bag 10 is directed from the notch 14 toward one side end 12c along the length (depth) direction (the right end in FIG. 2A). , The diagonal line (straight line) -shaped guide lines 15 are attached at intervals so as to extend away from the edge (end edge) of the one end area 12a on the opening side. Further, a linear sub-guide line 16 connecting them is attached along the length direction in the vicinity of the side end 12c along the length direction, that is, at the tip of each guide line 15. The sub-guide line 16 is usually linear as shown in the drawing, but may be appropriately changed according to the purpose in a shape within a range not significantly deviating from the linear shape, such as a gentle wavy line shape.

The notch 14 is closer to the side end 12c along the length direction than the range where the mating portion (see FIG. 11) is formed, and is from the valley 13a of the folding portion 13, that is, from the folded position of the folding portion 13. It is formed closer to the mating part (however, it may be located at the valley 13a). That is, it is formed at a position between the mating portion and the folding portion 13 so as not to cover both portions. If it is formed closer to the side end opposite to the side end 12c than the tip of the mating portion, the tearing of the bag may be guided to the side where the guide wire 15 is not attached and the opening may fail. On the other hand, if it is formed closer to the side end 12c than the valley 13a of the folding portion 13, it tends to be difficult to avoid the folding portion 13 of the seal portion of the one end region 12a and open the seal.

In the example of FIG. 2A, the guide line 15 from the one end area 12a is attached so as to be in contact with the notch 14 as the opening start point, but the present invention is not limited to this and is shown in FIG. 2B. As such, it may be attached apart from the notch 14. That is, the guide line 15 does not necessarily have to be in contact with the opening start point as long as it is attached toward the side end 12c along the length direction with respect to the opening start point.

Here, the relationship between the guide line 15 and the folding portion 13 will be described with reference to FIGS. 3A to 3C. 3 (a) to 3 (c) are diagrams showing examples in which the range to which the guide line of the present invention is attached is changed. Specifically, in FIG. 3A, the position is 25% of the width W (see FIG. 1A), in FIG. 3B, the position is 33% of the width W, and in FIG. 3C, the position is 50% of the width W. Therefore, guide lines 15 are attached to each of them. It should be noted that FIGS. 3A to 3C are projection views when the bag not filled with the contents is flattened, and the purpose is to explain the relationship between the folding portion 13 and the guide line 15. Therefore, the opening start point and the sub-guide line are not shown.

In the examples shown in FIGS. 3A to 3C, when the folding allowance of the folding portion 13 is the folding width BW as shown in FIG. 1B, the folding width BW is the width. It is formed so as to have a length of 1/3 of W. That is, the lengths of the folding widths BW are the same in the examples of FIGS. 3A to 3C.

When the folding portion 13 is formed so as to have such a folding width BW, the guide line 15 is shown in FIG. 3A from the outside (side end 12c side along the length direction) of the folding portion 13 in FIG. In (b), it is attached from substantially the same position as the folding portion 13, and in FIG. 3C, it is attached from the inside (center side along the width direction) of the folding portion 13.

In the case of the example of FIG. 3, the range to which the guide line 15 is attached is preferably from a position of 33% or more of the width W. If the range is less than 33% of the width W, it may not be easy to open the packaging bag 10. Further, in order to make the opening of the packaging bag 10 easier, in the example of FIG. 3, the range is more preferably 50%. That is, it is easier to open the seal by attaching the guide wire 15 from the inner side so that the guide wire 15 is guided so as not to cover the folded portion 13 of the seal portion of the one end region 12a.

Further, in the examples of FIGS. 2A and 2B, a notch 14 is formed at the opening start point, but the opening start point may have another shape. FIG. 4 is a diagram schematically explaining a main part of an example in which the shape of the opening starting point of the packaging bag of the present invention is changed. The example shown in FIG. 4 is a type in which a continuous notch, a so-called jagged notch, is formed at the edge (end edge) of both end regions (only the end region 12a is shown in the figure) along the width direction. In this case, since the notch cannot be formed, or even if it is formed, it is difficult to distinguish it. Therefore, a display 17 for guiding the opening along the length direction from the opening start point is attached by printing. In the example of FIG. 4, arrows are attached at intervals in the length direction.

Further, as shown in FIG. 5, a second notch (auxiliary notch) 18 may be made in addition to the notch 14 at the opening start point to make it easier to reach the guide line 15 after opening. In this case, if it can be formed, it may be easier to reach the guide line 15 by providing more auxiliary cuts.

On the other hand, the sub-guide line 16 attached to the vicinity of the side end 12c along the length direction shown in FIG. 2 and the like is for further guiding the opening along the guide line 15 after the opening is guided to the tip of the guide line 15. It is a guide line, which opens the bag greatly. That is, as a case where the opening fails, (1) a strong force is required to open the seal portion by applying a strong force to the folding portion 13, and the contents fall at the moment of opening, (2) the opening becomes smaller. There are mainly two ways to open it with scissors again. Therefore, by setting the opening start point so as not to cover the folding portion 13 of the seal and guiding the seal with the guide wire 15, the adverse effect of (1) above can be prevented, and by guiding with the sub guide wire 16 to widen the opening opening. This prevents the harmful effect of (2) above.

Further, since the guide line 15 can be guided to the sub guide line 16 so as to avoid the contents at the time of opening, the force required for opening can be small. Specifically, the present inventor has confirmed that the force required for opening can be reduced by about 70% as compared with the case where there is contact with the contents at the time of opening.

Here, if only the sub-guide line 16 is attached and the guide line 15 is not attached, there is no means for guiding the user to reach the sub-guide line 16, so that the opening direction from the opening start point is the sub-guide line 16. The packaging bag 10 may be largely avoided toward the side end opposite to the near side end 12c. In the packaging bag 10 of the present invention, this is prevented by attaching the guide wire 15 as a guiding means to the sub guide wire 16.

Further, since the packaging bag 10 is finally opened by the sub-guide lines 16 continuously attached along the length direction, the guide lines 15 are obliquely opened from the opening start point in the width direction. It suffices to form one with a simple shape that moves away, and the package can be opened smoothly without being attached in multiple layers in the width direction. Therefore, the process of attaching the guide wire 15 becomes easy.

If the sub-guide line 16 is attached in the vicinity of the side end 12c, there is no strict limitation on the attachment position, but it is preferable that the sub-guide line 16 is attached so as to be completely aligned with the side end 12c as much as possible in terms of processing accuracy. However, considering the influence on the strength of the bag, the position is near the side end 12c, that is, about 5 mm from the side end 12c, or about 10% from the side end 12c with respect to the width of the bag. It is more preferable to attach it.

The guide wire 15 and the sub guide wire 16 are preferably attached to the same side of the outer surface of the front and back when the upper surface of the packaging bag 10 is the front side and the bottom surface is the back side. If it is attached only to the outer surface of either the front or the back, it may be difficult to easily open the packaging bag 10 without tearing the folding portion 13. Further, when the bags are attached to different sides on the front and back sides, it may be difficult to open the bag and the strength of the bag may be weakened. Here, the same side means the same side with the height H as the distance between the front and back surfaces of the outer surface of the packaging bag 10 shown in FIG. In other words, it means that it is attached to the part sandwiched between the positions that are the opening start points of the front and back when the folding portion 13 is unfolded, and it does not mean the same side when the front and back are viewed in a plane. .. The guide wire 15 and the sub guide wire 16 need only be attached to the same side of the outer surface of the front and back surfaces, and the positions and intervals are the same on the front and back surfaces so as to be line-symmetrical with the folding portion 13 sandwiched at the time of deployment. It does not have to be.

The interval I for attaching the guide wire 15 is set in order to facilitate opening by the process of attaching the guide wire 15 when the distance from the edge of the one end region 12a to the seal base end is the seal (sealing) width SW. , The sum of the value of 50% or less of the height H and the seal width SW is preferable. Further, the sum of the value of 40% or less of the height H and the seal width SW is more preferable, and the sum of the value of 30% or less of the height H and the seal width SW is particularly preferable. Further, the interval I may be a distance equal to the seal width SW, that is, the sum of the value of 0% of the height H and the seal width SW. If the value of the interval I exceeds the value in the above-mentioned preferable range, it may be difficult to induce opening. The value of the seal width SW may be appropriately set to a value that is usually applied in consideration of the width W, the length L, and the height H of the packaging bag 1.

The angle of inclination of the guide line 15 with respect to the width direction is not particularly limited as long as it is oriented away from the end region 12a, but is preferably 20 ° or more in order to facilitate opening.

The film constituting the packaging bag 1 may have a single layer or a multi-layer structure, but is usually composed of a film layer containing a metal such as aluminum or a resin such as polyester, nylon or polyolefin. Specifically, in the case of multiple layers, the outermost layer is preferably a polyester layer such as polyethylene terephthalate or a nylon layer, and conversely, the innermost layer is preferably a polyolefin layer such as polyethylene. Further, although it depends on the purpose, it is preferable to include an aluminum layer in the middle because the barrier property is improved. In addition, a layer made of nylon resin, acrylic resin, or the like may also be suitable. Further, as the metal of the intermediate layer, aluminum is usually used from the viewpoint of versatility, but other metals such as copper foil, steel foil, and gold leaf may be included.

The film processing method is not particularly limited as long as it is a method usually used for producing a film for a packaging bag, but when the film is a single layer, for example, an inflation method or a T-type die method is used. Resin molten film molding and the like can be mentioned. When the film is multi-layered, for example, extrusion laminating, dry laminating, multi-layered inflation method, multi-layered T-type die type resin molten film molding, and the like can be mentioned.

As such a film configuration, in the examples shown in FIGS. 6A to 6C, the polyethylene terephthalate (PET) layer 31 and the first polyethylene (PE) are arranged in this order from the outermost layer of the film layer 30 of the packaging bag 1. The layer 32, the aluminum (AL) layer 33, and the second PE layer 34 are laminated by extrusion lamination. Although not shown, an anchor coating (AC) agent is used between the PET layer 31 and the first PE layer 32 and between the AL layer 33 and the second PE layer 34, respectively. ing.

Here, FIGS. 6 (a) to 6 (c) show examples in which the depth at which the guide line 15 of the present invention is attached is changed, and in FIG. 6 (a), up to half of the outermost PET layer 31 is displayed. The guide line 15 is attached to the bottom of the same layer 21 in FIG. 6 (b) and to half the depth of the first PE layer 32, which is the next layer in FIG. 6 (c). The guide line 15 can be easily opened at any of these depths. For example, in the layer structure shown in FIG. 6, it is sufficient to attach the guide line 15 to at least half the depth of the outermost layer. Yes, this also applies to sub-guide lines (not shown in FIG. 6).

The guide wire 15 and the sub guide wire 16 can be easily attached by irradiating a carbon dioxide laser from the surface with a commercially available laser marker, for example. Thereby, these lines can be easily attached. Further, the processing of attaching these lines may be performed before or after the packaging bag 10 is made, but it is usually attached before the contents are put in.

Although the example of FIG. 6 is laminated by extrusion lamination, the present invention is not limited to this, and the present invention can be applied to layers laminated by other methods such as dry lamination. The specific conditions of these laminating methods may be appropriately adjusted to the specifications that are usually used.

The overall thickness of the film layer 20 is not particularly limited, but is usually about 50 to 80 μm. In consideration of protection of the contents, strength of the bag, usability, etc., the bottom layer is the thickest, and the AC agent. The aluminum layer is often the thinnest, except for the layers made of adhesives such as.

In the packaging bag 10 of the present invention, a guide line 15 is attached so as to be away from one end edge 12a on the opening side toward the side end 12c along the length L direction from the opening start point, and the vicinity of the side end 12c. Since the sub guide wire 16 connecting the tips of the guide wires 15 is attached along the length L direction, the packaging bag 1 can be opened along these. That is, as shown in FIGS. 2 (a) and 2 (b), the seal width SW does not cover the folding portion 13, and when the seal width SW is exceeded, the sub guide line 16 is reached, and along this, FIG. The packaging bag 1 can be smoothly torn in the directions indicated by the arrows (a) and (b). As a result, the folding portion 13 is not torn at the portion of the seal width SW and the opening fails, and the opening can be facilitated.

Further, since the guide wire 15 and the sub guide wire 16 are attached by the laser marker, it is easy to process them, the depth can be easily controlled, and the influence on the strength of the packaging bag 1 can be reduced.

Further, since the guide wire 15 and the sub guide wire 16 do not need to be aligned in the flow direction of the packaging bag 10, they can be applied to a wide range of bag making machines.

Although the embodiment of the present invention has been described in detail above, the packaging bag of the present invention is not limited to the above-described embodiment and may include any technical idea assumed within the scope of the embodiment.

For example, in the case of a packaging bag having a relatively narrow width, a guide line may be attached in consideration of the width. Here, FIGS. 7 (a) and 7 (b) are views for explaining the actions that may occur at the time of opening when the width of the packaging bag is narrow, and FIGS. 7 (c) and 7 (d) and 8 are modifications of the present invention, respectively. It is a figure which briefly explained the main part of.

There is a packaging bag that is relatively narrow and the distance between the valleys of the folding width BW of both folding portions 13 is shorter than the folding width BW. As shown in FIG. 7A, in the case of such a packaging bag 40, since the width of the portion excluding the folding width BW is narrow, even if the package is opened according to the guide line 15 at the time of opening, the guide line 15 If the inclination angle is loose, it is easy to be applied to the folding portion 13 on the seal width SW as shown by the cross mark. As a result, as shown in FIG. 7B, the packaging bag 40 may be torn and the opening may fail. In order to prevent this, for example, a curved guide line 45 is attached as shown in FIG. 7 (c), or a guide line 15 is provided so as not to hit on the seal width SW as shown in FIG. 7 (d). It can be attached with a more inclined shape. As a result, even if the packaging bag 40 has a narrow width, it can be opened along the guide line 15 at the time of opening without engaging with the folding portion 13 on the seal width SW.

If the angle of the guide line 15 is made steep or the shape of the guide line 15 is changed to a curved shape in this way, it becomes easier to reach the guide line 15 at the time of opening. Even if it is wider than the value of 50% or less of the value and the value of the sum of the seal width SW or less, the guidance of opening is easy.

Further, the method of attaching the guide line 15 shown in FIG. 7 (d) is improved, and the angle is set from the opening start point 14 to the valley 13a of the folding portion as shown in the guide line 25 shown in FIG. It is more preferable that the line segment 25b from the valley 13a to the sub-guide line 16 is attached in a polygonal line shape so as to be gentler than the minute 25a. By attaching the guide wire 25 in this way, since the angle of the line segment 25a is relatively steep, it is possible to prevent the guide wire 25 from engaging with the folding portion 13 and failing to open. On the other hand, in the line segment 25b, by making the angle of the guide line 25 gentle, the processing interval of the guide line 15 can be shortened, and a large number of lines can be added. The guide wire 25 can be easily processed at the time of manufacturing. That is, in the guide line 25, the line segment 25b from the valley 13a of the folding portion is attached so as to have a gentle inclination from the line segment 25a up to the valley 13a of the folding portion, so that the edge opposite to the opening start side is attached. It is easy to reach the sub guide line 16 up to the line closest to the guide line 25, and the processing of the guide line 25 is facilitated.

In order to have such an effect, the polygonal guide wire 25 in FIG. 8 is preferably attached not only to a narrow type packaging bag but also to a packaging bag in which there is little concern that the folded portion may be caught when the bag is opened. Can be done.

The specific angle of the guide line 25 shown in FIG. 8 with respect to the width direction is, for example, 20 ° or more for the line segment 25a and less than 20 ° for the line segment 25b.

Further, the polygonal guide line 25 may be visually determined to be substantially a straight line, and the curved line may be mixed at a portion where the angle changes due to manufacturing restrictions or the like.

[Forms other than gusset type]
The packaging bag of the present invention has been described mainly with the example of the gusset type, but since the gassho bag has the same configuration except for the presence or absence of the folding portion, the present invention can be applied to this. .. It can also be widely applied to so-called pillow-shaped bags such as three-sided bags and four-sided bags. 9 (a) and 9 (b) are diagrams illustrating the actions that can occur at the time of opening when a gassho bag is applied as the packaging bag of the present invention, and FIG. 10 (a) is a diagram showing guide lines on the front and back of the packaging bag in FIG. FIG. 10B is a diagram schematically explaining an example in which the formation range is changed, and FIG. 10B is a diagram explaining the action.

Here, in the packaging bag 50 of the type having no folding portion like the gassho bag shown in FIG. 9A, when the guide wires 55 are attached so that the positions in the width direction and the depth direction coincide with each other on the front and back surfaces of the outer surface. As shown in FIG. 9B, by opening the package along the sub-guide line 56 to the end, that is, the edge on the end region 12b side, the packaging bag 50 is torn and scraps are likely to be generated.

Therefore, as shown in FIG. 10A, it is preferable that the packaging bag 50 is attached to the guide wire 55 with the front side guide wire 55a and the back side guide wire 55b displaced from each other in the forming position.

In the packaging bag 50, the guide wire on either side (front guide wire 55a in this example) ends inside the guide wire on the other side (back guide wire 55b in this example). That is, the front side sub guide line 56a is attached to the inside of the back side sub guide line 56b, and the front side guide line 55a has a shorter formation range than the back side guide line 55b. Further, in the example of the packaging bag 50, the front side guide line 55a and the back side guide line 55b are aligned so that the base end positions match in both the width direction and the depth direction. Then, the guide wire on the side having a short forming range (in this example, the guide wire 55a on the front side) is on the side having a long forming range so that the positions of the front side guide wire 55a and the back side guide wire 55b match in the depth direction of the tip. It is formed at a steeper angle with respect to the width direction than the guide wire (in this example, the back side guide wire 55b).

As a result, as shown in FIG. 10B, the packaging bag 50 can be stopped from being opened at the end region 12b on the side opposite to the opening start side, so that the packaging bag 50 can be cut without reaching the ends of the sub-guide lines 56a and b. It is possible to prevent the generation of residue. In addition, since the part to be opened is misaligned on the front and back of the outer surface, it looks like the bag is turned over, and it can be opened while checking the contents, so there is less risk of damaging the contents and it is easy to take out the contents. Become.

In the example of FIG. 10A, the front side guide line 55a and the back side guide line 55b match the positions of both the width and depth of the base end and the depth direction position of the tip, but they are different from each other. It may be attached. Further, although the front side guide wire 55a is attached at a steeper angle than the back side guide wire 55b, it may be attached so as to have the same angle. That is, it suffices that the formation range of the guide line is shorter than that of the other guide line by locating the guide line and the sub guide line on either the front side or the back side inside.

Further, the example of FIG. 10A is a gassho bag, but for example, a bag of a stacking type (also referred to as an envelope sticking) or another type having a thin pillow shape such as a three-sided bag or a four-sided bag. It may be applied to a bag.

Further, the present invention can be applied to any size as long as it is a packaging bag having a flat pillow shape.

Hereinafter, examples of the present invention will be described, but the present invention is not limited to the following examples.

[Relationship between angle and machining range and depth]
In order to verify the relationship between the inclination angle of the packaging bag with respect to the width direction when the guide wire is attached and the processing range and depth, a sample was prepared and evaluated as follows.

A) Relationship between angle and processing range In the configuration of the film layer 30 shown in FIG. 6, the thickness of the polyethylene terephthalate (PET) layer 31 is 12 μm, the thickness of the first polyethylene (PE) layer 32 is 15 μm, and aluminum (PET). A film processed by extrusion lamination was prepared so that the thickness of the AL) layer 33 was 7 μm and the thickness of the second PE layer 34 was 20 μm. At this time, an anchor coat (AC) agent was used between the PET layer 31 and the first PE layer 32, and between the AL layer 33 and the second PE layer 34.

In this film, 10 sheets of PTP (Press Through Package) as an analog of the contents were placed alternately on the front and back sides, and as shown in FIG. 1, a packaging bag 10 made into a gusset pillow shape was used as a sample. Many were made. In this sample, the width W × length L × height H = 70 mm × 210 mm × 40 mm shown in FIG. 1 and the seal (sealing) width SW by heat fusion shown in FIG. 2 (a) are 19 mm. Made in.

Before inserting the above-mentioned content analog into the sample, the guide line 15 is sealed (sealed) with a laser marker so as to have a depth equal to the thickness of the PET layer 31 as shown in FIG. 7 (b). Stop) Intervals I (see FIG. 2A) having the same length as the width SW are diagonally lined. The laser marker used was LP-430U manufactured by Panasonic Industrial Devices SUNX, and the conditions were that the laser output was 80% of the maximum output and the scanning speed was 1,200 mm / sec.

At this time, the guide wire 15 is shifted from the opening by 10 ° from 10 ° to 80 ° with respect to the width W direction so as to be separated from the opening on the end 12c side, and is shown in FIG. 3A. Samples attached to the range from the position of 25% with respect to the width W, the range from the position of 33% shown in FIG. 3 (b), and the range from the position of 50% shown in FIG. 3 (c). Ten bags were prepared at a time.

Here, FIG. 3A shows the direction of the folding portion 13, FIG. 3B shows the position substantially overlapping the end 13a of the folding portion 13, and FIG. 3C shows the direction of the width W from the folding portion 13. This is an example in which guide lines 15 are attached from the center side along the line. A notch 14 as an opening start point is provided in advance at the starting point of the guide line 15 on the most end region 12a side of the sample. Further, in the vicinity of the end 12 side of each sample, the tip of each guide wire 15 was connected, and a sub guide wire 16 along the depth direction was attached under the same processing conditions and depth as the guide wire 15.

In the sample, the mating portion is a so-called gassho-pasted type, and the formation position of the notch 14 does not cover the tip of the mating portion (see FIG. 11) on the opposite surface. Further, the fact that the forming position of the notch 14 does not cover the tip of the mating portion and that the sub guide wire 16 is attached under the same conditions as the guide wire 15 are the same for the samples at the time of each verification described later.

For these samples, 10 people were asked to open the seal from the opening, and if the seal width was SW and the seal could be opened smoothly without touching the folding part 13, it was judged that the opening was successful, and the number of people was determined. I counted. The results are shown in Table 1.

表１の結果より、ガイド線を幅に対して２５％の位置から付した場合は、開封に成功することもあるが十分ではなく、開封を容易にする効果を得るには、幅に対して３３％以上の位置からガイド線を付すことが好ましく、さらに５０％の位置から付すと、ほぼ確実に開封に成功した。この結果より、ガイド線は、折込部にかからないように付すことが求められ、折込部より中央寄りから付すことが、より好ましいことがわかった。

From the results in Table 1, when the guide line is attached from the position of 25% of the width, the opening may be successful, but it is not enough, and in order to obtain the effect of facilitating the opening, the opening is not sufficient. It is preferable to attach the guide wire from a position of 33% or more, and when it is attached from a position of 50% or more, the opening is almost certainly successful. From this result, it was found that the guide wire was required to be attached so as not to cover the fold portion, and it was more preferable to attach the guide wire from the center side of the fold portion.

On the other hand, the inclination angle with respect to the width of the guide line can be successfully opened regardless of whether it is 10 ° to 80 °, and considering the result of attaching the guide line from the 50% position, it is 20 ° or more. It turned out that it was possible to open the package reliably and it was preferable.

B) Relationship between angle and processing depth range With respect to the sample prepared with the above-mentioned layer structure and size, the guide line 15 is drawn from a position 50% of the width W shown in FIG. 3 (c). The range was diagonally lined with the above-mentioned laser marker at an interval I (see FIG. 2A) having the same length as the sealing width SW.

At this time, the inclination angle of the guide line 15 is shifted in the same manner as when the above-mentioned processing range is examined, and the depth is up to 1/2 of the outermost PET layer 31 shown in FIG. 6 (a). Then, a sample attached so as to have the same depth as the same layer shown in FIG. 6 (b) and a depth up to 1/2 of the first PE layer 32 of the next layer shown in FIG. 6 (c). 10 bags were prepared at a time.

Here, the conditions for processing with the laser marker are the same as when the above-mentioned processing range is examined when the depth is the same as the outermost layer in FIG. 6 (b), but the outermost layer in FIG. 6 (a). When the depth is halved, the laser output is 20% of the maximum output and the scanning speed is 1,200 mm / sec. When the depth is up to 1/2 of the layer next to the outermost layer in FIG. 6C, the laser output is 80% of the maximum output and the scanning speed is 200 mm / sec.

For these samples, 10 people were asked to open the seal from the opening, and if the seal width was SW and the seal could be opened smoothly without touching the folding part 13, it was judged that the opening was successful, and the number of people was determined. I counted. The results are shown in Table 2.

表２の結果より、ガイド線を最表層の１／２以上の深さとなるように付せば、開封を成功させられることがわかった。

From the results in Table 2, it was found that the opening can be successful if the guide wire is attached so as to have a depth of 1/2 or more of the outermost layer.

On the other hand, the angle of inclination with respect to the width of the guide line can be any of 10 ° to 80 °, and the opening can be successful. Considering the results when the mixture was applied to a depth of 1/2, it was found that the temperature of 20 ° or more is preferable because the package can be opened reliably.

[About guide line spacing]
In order to verify the effect of changing the interval of attaching guide lines, the following evaluation was performed.

With respect to the sample prepared with the above-mentioned layer structure and size, the guide line 15 is shown in FIG. 6 (b) in the range from the position of 50% with respect to the width W shown in FIG. 3 (c). The depth of the PET layer 31 on the outermost layer was marked with a diagonal line having an inclination of 30 ° with respect to the width W direction under the same conditions as when the above-mentioned processing range was examined by the above-mentioned laser marker.

At this time, the guide lines 15 are arranged from 0% so that the distance I shown in FIG. 2A is the sum of the seal (sealing) width SW and the height H of 0 to 50%, respectively. 10 bags of samples were prepared at different distances of 10%.

For these samples, 10 people were asked to open the seal from the opening, and if the seal width was SW and the seal could be opened smoothly without touching the folding part 13, it was judged that the opening was successful, and the number of people was determined. I counted. The results are shown in Table 3.

表３の結果より、ガイド線の間隔は、シール幅と包装袋の高さの５０％以下との和以下であれば、概ね開封に成功できるが、より確実に開封を成功させるには、シール幅とその高さの４０％以下との和であることが好ましく、シール幅と高さの３０％以下との和となるように付すと、ほぼ確実に開封に成功することがわかった。

From the results in Table 3, if the distance between the guide lines is less than or equal to the sum of the seal width and 50% or less of the height of the packaging bag, the opening can be generally successful. It was found that the sum of the width and 40% or less of the height is preferable, and that the opening is almost certainly successful when the seal width is added so as to be the sum of 30% or less of the height.

[Effects of other configurations]
In order to verify the effect of changing the layer structure of the film layer 30 shown in FIG. 6, the following evaluation was performed.

The following 10 types of examples (a) to (j) were prepared as the constitution of the film layer, and samples were prepared to the above-mentioned size based on each of them.

(A) Example shown in FIG. 6 (b) In the example shown in FIG. 6, the same example except that the PET layer was changed to a stretched polypropylene (OPP) layer of 20 μm. Similar example except that the layer was changed to a stretched nylon (O-Ny) layer of 20 μm (d) In the example shown in FIG. 6, the same example except that the PET layer was changed to a cellophane layer of 300 μm (e) From the outermost layer Example of extrusion laminating processing using an AC agent between both layers so that the PET layer is 12 μm and the polyethylene layer is 20 μm in order. (F) In the above example (e), the PET layer is stretched polypropylene (OPP) layer. Similar example except that it was changed to 20 μm (g) In the example of (e) above, the same example except that the PET layer was changed to a stretched nylon (O-Ny) layer of 15 μm (h) In the example of (e) above , The same example except that the PET layer was changed to a cellophane layer of 300 μm. (I) Extrusion laminating processing was performed between the two layers using an AC agent so that the PET layer was 12 μm and the PE layer was 35 μm in order from the outermost layer. Example (j) An example in which an adhesive is applied between each layer and dry-laminated so that the PET layer is 12 μm, the AL layer is 9 μm, and the polypropylene nitrile layer is 30 μm in order from the outermost layer. Line 15 is drawn from a position 50% of the width W shown in FIG. 3 (c) to the depth of the outermost layer under the same conditions as when the above-mentioned processing range was examined by the above-mentioned laser marker. , 10 bags of samples attached in a diagonal line having an inclination of 30 ° with respect to the width W direction were prepared.

For these samples, 10 people were asked to open the seal from the opening, and if the seal width was SW and the seal could be opened smoothly without touching the folding part 13, it was judged that the opening was successful, and the number of people was determined. I counted. The results are shown in Table 4.

表４の結果より、フィルム層の構成や加工方法を変更しても、開封に成功しており、通常この種の包装袋で適用されるフィルム層の構成や加工方法であれば、種類を問わず開封を容易にするという本発明の効果を発揮可能であることがわかった。

From the results in Table 4, even if the composition and processing method of the film layer are changed, the package is successfully opened, and any type of film layer composition and processing method usually applied to this type of packaging bag can be used. It was found that the effect of the present invention of facilitating opening can be exhibited.

However, in the configuration containing AL, when the outermost layer was cellophane, the openability was inferior to that of the other configurations. Further, in the configuration not containing AL, when the outermost layer was OPP or cellophane, the opening property was inferior to that of other configurations. It is considered that this is because the material itself of OPP and cellophane is easily torn, so that the material may be torn first and opened before it follows the guide line.

That is, it has been found that the present invention is preferably applied to a material that is difficult to tear, and for example, when the outermost layer is a PET layer or a nylon layer, it can be reliably opened and is preferable.

[About the shape of the guide wire]
As shown in FIG. 8, for the sample prepared with the above-mentioned layer structure and size, the guide line 55 is sub-guided from the valley 13a from the line segment 25a from the opening start point 14 to the valley 13a of the folding portion. Eighty bags of samples were prepared so that the line segment 25b up to the line 16 was looser. When the opening test was performed on these from the opening opening, all of them could be opened smoothly without touching the folding portion 13.

On the other hand, as shown in FIG. 7, when 80 bags of the same sample were prepared and opened except that the guide lines were linearly attached, 6 bags (about 8%) were successful with a probability of 90% or more. There was a failure example of.

From this result, it was confirmed that the example in which the angle of the guide line 25 is provided in a polygonal line shape with the valley 13a of the folded portion shown in FIG. 8 sandwiched is a more preferable mode in order to smoothly open the package.

10, 40, 50 Packaging bag 12a, b End area along the width direction 12c Side end along the length (depth) direction 13 Folding part 13a, b Valley of the folding part 14 Notch 15, 25, 55 Guide line 16 Sub guide line 17 Indication to guide opening 18 Second notch (auxiliary notch)
25a, b (guide wire) line segment 30 Film layer 31 Polyethylene terephthalate (PET) layer 32 First polyethylene (PE) layer 33 Aluminum (AL) layer 34 Second polyethylene (PE) layer 55a Front side guide wire 55b Back side Guide wire 56a Front side sub guide wire 56b Back side sub guide wire L Length (depth)
W Width H Height BW Folding Width SW Seal Width

Claims (8)

A packaging bag made of a film, wherein the films are joined on one side surface or one of the flat surfaces to form a mating portion that is sealed along the depth direction.
An opening start point is provided at one end edge along the width direction, and a so-called jagged notch, which is a continuous notch at both end edges along the width direction, is formed.
In the vicinity of one side end along the depth direction from the opening start point, a wavy first guide line is provided on both the front and back sides of the outer surface of the bag along the depth direction to the other end edge along the width direction. A packaging bag characterized by being attached. A pair of folds are formed inwardly folded from both ends along the depth direction, and both the folds and the parts other than the folds align the back surfaces of the film in both ends along the width direction. A packaging bag in which the mating portion is sealed along the depth direction by combining films extending toward the center from both sides in the width direction on one plane.
The packaging bag according to claim 1, wherein the opening start point is provided at any position between the position not touching the mating portion and the position not touching the folding portion. The packaging bag according to claim 1 or 2, wherein the first guide line is attached to a position at a distance of 20% or less with respect to the distance of the width of the bag from the side end. The packaging bag according to any one of claims 1 to 3, wherein the first guide line is attached by shifting the formation position on the front and back surfaces of the outer surface of the bag. The first guide wire is attached so that the distance from the side end on one of the front and back surfaces of the bag is 50% or more and less than 100% with respect to the distance from the side end on the other side of the front and back surfaces. The packaging bag according to claim 4. A second guide line formed from the opening start point toward one side end along the depth direction and away from the one end edge along the width direction, and connected to the first guide line at the tip. The packaging bag according to any one of claims 1 to 5, wherein the inclination angle with respect to the width direction is in the range of 10 ° to 80 °. The packaging bag according to claim 6, wherein the second guide line has a portion to which the inclination angle is 20 ° or more. The packaging bag according to claim 6 or 7, wherein the second guide wire is attached in a straight line or a polygonal line.

Images