JP2012246049A - Easily openable twofold bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twofold bag from which goods including food such as snacks, medicines, cosmetics or other sundries packaged therein can be easily taken out by tearing a part of an individual package film.SOLUTION: This easily openable twofold bag is formed with a heat seal part 17 apart from an edge so that a holding part 12 for holding an upper sheet 14 from one edge 15 is secured. The holding part 12 side of the heat seal part 17 is recessed to be concaved, which is also formed with a pair of cut lines 13, 13 from the edge for easily tearing a part of the upper sheet 14 from the cut lines 13, 13 for opening the bag.

Description

  The present invention relates to a palm bag that can be easily and smoothly opened mainly for packaging confectionery.

  When individually packaging confectionery such as pie, buns, and rice crackers, a palm bag is generally used in which a film having a polyolefin layer is used and heat-sealed with the edges facing each other. When opening this, the adhesive part is peeled off by applying a force to peel off the heat-sealed part, or a cut or notch is made in advance from the edge, and the film is torn from there. The method is used.

  However, excessive force is applied to peel off the heat-sealed portion, so that the contents may be scattered when opened. Moreover, in order to ensure sufficient sealing performance, it is necessary to adhere with a certain degree of strength, and there are cases where a child with weak strength cannot perform opening. For this reason, providing the easy peel layer which is an adhesive surface which is easy to peel off is performed (patent document 1).

JP-A-11-130145

However, when the easy peel layer is provided in the palm portion at the center of the rear surface as in Patent Document 1, the unsealed portion becomes linear, and it may be difficult to take out when the contents are large.
On the other hand, in the method of simply opening along a cut line or notch, generally, a cut line or a cut is provided at the end of a cylinder formed by a palm, but the back surface and the surface are torn together. Therefore, there is a case where the movement to tear the film is interrupted by the confectionery contained therein. On the other hand, it is convenient if you pick only a part of the back surface and tear it in the cylindrical length direction, but in this case, even if the heat seal part at both ends is used as an easy peel film, the force is still applied. It was difficult to peel off because it was difficult.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a palm bag that can easily tear out a part of an individually wrapped film and easily take out food such as confectionery, pharmaceuticals, cosmetics, and other miscellaneous goods. .

This invention relates to a palm bag that is cylindrical and heat-sealed at both ends.
The edge of one end and the heat seal part are separated by a predetermined distance,
The part between the edge of this one end and the heat seal part forms a knob part that can pick one of the two opposing sheet parts,
The heat seal part is formed in a concave shape by forming a rectangular concave part in the center part on the knob part side,
The above-mentioned problem has been solved by making a pair of cuts that can be pinched in at least one of the two sheet portions forming the knob portion.

  In other words, when opening this palm bag, by pulling with a finger between a pair of cuts on the pick part of one sheet part, the sheet part is torn along the extension line of the cut, and heat is Only the central part of the seal part is peeled off, and a band-shaped opening is formed in the part containing the confectionery. At this time, since the recess and the pair of cuts face each other, the stress pulled from the pair of cuts is easily transmitted on the extension line of the cuts, and the heat seal part is easily peeled off with a certain width. Furthermore, the interval between the pair of cuts is such that the finger can be picked and torn, and the width of the opening can be secured at least as wide as that, making it easier to take out the encased confectionery. For example, when individual peanuts and other small confectionery are packed together, the individual peanuts can be taken out from the opening with the opening opening facing up, so that it can be used as a dish when eating the bag as it is .

  It is preferable that the bottom of the recess and the interval between the pair of cuts are close, and more preferably, the boundary between the recess and the side portions coincides with the direction toward the pair of cuts.

  If the pair of cuts are formed by sandwiching the joint portion where the side edges of the joint bag are joined together, the joint portion having a thickness equivalent to three sheets can be firmly picked, so that it is easier to open. Become.

  Also, if the distance between the pair of cuts is about the same as or shorter than the bottom of the recess, or if the direction of the cut is inclined toward the center, the length of the heat seal part to be peeled is shortened by the recess. Since it is only a portion, the time required to apply force until it completely peels off can be shortened.

  This joint bag may be simply cylindrical and then flattened and heat-sealed. However, if the heel is formed by folding both side surfaces inward, the heel expands after the article is sealed. As a result, the internal volume increases, and more articles can be placed. It is also preferable because it looks beautiful.

  The sheet must have at least a heat-sealable layer on the inner surface side. For example, a polyolefin film such as polyethylene or polypropylene, or a thermoplastic resin film such as an ethylene-vinyl acetate copolymer is used. Can do. Furthermore, not only a single-layer sheet of such a film but also a multilayer sheet in which an aluminum foil or Japanese paper is arranged on the outer surface side is preferable from the viewpoint of strength.

  The adhesive strength of the heat seal part depends on the components and amount of the thermoplastic resin film, but the opening strength required for peeling the heat seal part at the time of opening is 2 N / 15 mm or more and 10 N / 15 mm or less. If present, it is usually difficult to peel off, and it is preferable because it becomes easily peelable when opened.

  By employing the easy-opening palm bag according to the present invention, it is possible to easily open the bag while suppressing the risk of catching at the time of opening and scattering of the contents. In addition, when a large number of small confectionery such as raisins and peanuts are included, it can also be used as a dish that can be placed on the spot even after opening to easily pick out the confectionery from the opening.

The perspective view which shows embodiment of the easy-opening joint palm bag concerning this invention A perspective view when forming both-sided adhesive parts by overlapping both edges of the sheet The perspective view at the time of crushing the sheet made into the shape of a cylinder in flat shape with the formation of a collar part The figure which shows the state folded in the shape of a plane Plan view indicating the dimensions of one end and heat seal Perspective view of one end and heat seal A perspective view when inserting an article from the other end State diagram when opening an easy-opening palm bag State diagram when forming the opening while tearing the strip Photograph of bag according to Example 1 Photo when opening the bag of Fig. 10 (a) Photo of the bag according to Comparative Example 1 Photo when opening the bag of Fig. 11 (a) Photo of the bag according to Comparative Example 2 Photo when opening the bag of Fig. 12 (a) Photo of the bag according to Comparative Example 3 Photo when opening the bag of Fig. 13 (a)

  Hereinafter, the easy-opening palm bag concerning this invention is demonstrated by embodiment shown in FIG. This easy-opening palm bag 11 can be sealed by enclosing an article 31 such as solid food other than water, pharmaceuticals, cosmetics, and other non-sticky miscellaneous goods. Heat seal portions 17 and 18 are provided in the vicinity of both end portions 15 and 16, and the heat seal portion 17 on the side of one end portion 15 has a concave shape. The heat seal portion 17 is so far away from the edge of the one end portion 15 as to be able to be picked with a finger, thereby forming a pick portion 12 that can pick the sheet portion 14. When eating, the picking part 12 is pulled up, and the sheet part 14 is torn from the pair of cuts 13 and 13 to open it. In addition, the hatching in the figure indicates a portion where the inner surfaces are bonded by heat sealing, and the pattern does not appear on the surface.

  A detailed configuration of the easy-opening palm bag 11 according to this embodiment will be described with reference to an example of a manufacturing procedure. In addition, this invention will exhibit an effect, if a basic structure satisfy | fills conditions, The manufacturing method is not limited to the following manufacturing procedures. First, a heat-sealable sheet 21 is used as a material. To be heat-sealable is a single-layer sheet or a multi-layer sheet in which a thermoplastic resin film is disposed on at least one surface. The side on which the thermoplastic resin film is disposed is used as the inner side surface 22 and the side edges 23 and 23 are overlapped with each other as shown in FIG. 2, and a region with a predetermined width along the side edges 23 and 23 is heat sealed. Then, a joint-bonding portion 24 is formed. Thereby, the sheet | seat 21 becomes a cylinder shape.

  The width D of the joint-bonding portion 24 is not particularly limited as long as it can be bonded with sufficient strength. However, if the width D is too large, it is unclean and may interfere with the picking of the knob 12, so it is desirable that the distance D is smaller than the interval between a pair of cuts described later.

  Next, the direction of the cylindrical sheet 21 is changed so that the palm joint portion 24 is located near the center of the upper side surface and is folded so as to be flattened. This process is shown in FIG. This position does not have to be the center, but if it is the center, it will be easy to pick as will be described later. When folding, both side surfaces are folded inward to form the flange portions 26, 26 between the upper sheet portion 14 and the lower sheet portion 25. FIG. 4 shows the folded state. At the center in the width direction of the end portions 15 and 16, a palm joint portion 24 is arranged. That is, the side edge 23 is slightly shifted from the center in the width direction. A pair of cuts 13 are made in the upper sheet portion 14 provided with the palm-bonding portion 24 from the edge of one end 15 so as to sandwich the palm-bonding portion 24. The depth Ch and the interval Cw of the cut 13 will be described later.

  FIG. 5 is a plan view of the vicinity of the heat seal portion 17 on the one end portion 15 side. Heat sealing is performed at a position away from the edge of one end 15 by a predetermined distance S1. At this time, instead of heat-sealing in a simple belt shape, the concave heat seal portion 17 is formed so that the rectangular concave portion 27 is formed in the central portion on the knob portion 12 side. That is, the bottom side 28 portion of the rectangular recess 27 is located at a position further away from the edge of the one end 15 by Oh than the distance S1. The width Sh in both ends of the both side portions 29 of the recess 27 is larger than Oh, but if the difference (Sh−Oh) is too large, it will be difficult to peel off.

  In addition, when heat-sealing as described above, the flange portion 26 is also heat-sealed with each of the upper sheet portion 12 and the lower sheet portion 25. A perspective view of the vicinity of one end 15 after heat sealing is shown in FIG.

  After the heat seal portion 17 is formed as described above, the article 31 is inserted into the other end portion 16 by opening the space between the upper sheet portion 12 and the lower sheet portion 25. This state is shown in FIG. In addition, although the figure contains the article 31 which is one lump like a bun, many small fine confectionery items, such as peanuts and confetti, may be put. At this time, if there is the collar part 26, it is easy to unfold the bag and to easily enclose the article 31.

  After enclosing the article 31, the heat seal portion 18 is formed in the vicinity of the other end portion 16 to seal the article 31, and the embodiment as shown in FIG. 1 is completed.

  When opening the easy-opening palm bag 11 according to this embodiment, as shown in FIG. 8, the upper sheet portion 14 with a pair of cuts 13, 13 is turned upward, and the gap between the cuts 13, 13 is set. Pick up the knob 12. As shown in the figure, if there is a joint-bonding portion 24 between the cuts 13 and 13, the portion to be held is thick, so it is easy to hold and easy to apply force. If force is applied toward the other end 16 side while holding the knob portion 12, the extended lines of the cut lines 13, 13 are torn. At this time, since there is the concave portion 27, the force pulling the upper sheet portion 14 is concentrated inside the concave portion 27, and the sheet portion 14 is easily broken. Furthermore, since the center portion of the heat seal portion 17 is narrowed by the concave portion 27, the adhesive portion where the upper sheet portion 14 and the lower sheet portion 25 must be peeled off is short. FIG. 9 shows a state after the heat seal portion 17 is peeled off. Since the opening 30 is formed in a band shape, the article 31 inside can be easily taken out. Moreover, when it is fine confectionery, such as peanuts, the confectionery to enclose can be picked without difficulty from the opening 30 by leaving it open.

  If the opening 30 is formed up to the front of the heat seal part 18 on the other end 16 side, it is sufficient to take out a single confectionery (article 31). On the other hand, when trying to take out a fine confectionery (article 31) while being placed on the spot even after opening, it may be in the way if the strip 32 that has broken the opening 30 is still attached. is there. For this reason, the width of the heat seal portion 18 on the other end portion 16 side is set to the minimum length necessary for sealing, the adhesion of the heat seal portion 18 is also peeled off, and the strip 32 is attached to the other end portion 16. It is preferable that the edge can be easily broken. Moreover, in order to make it easy to break in this way, the heat seal portion 18 on the other end portion 16 side may also have a recessed central portion that becomes the strip-shaped piece 32.

  In order to use suitably as mentioned above, it is preferable that the length and arrangement | positioning of the heat seal part 17 and the cut | interruption 13 as shown in FIG. 5 are the following ranges.

  The length Ow of the bottom side 28 of the concave portion 27 is preferably 20% or more, and more preferably 30% or more of the length Bw of the end portion 15 of the easy-open mating bag 11. If the width of the concave portion is too narrow, the width of the strip-like piece 32 that should be shorter than that must be shortened, which may make it difficult to pick. On the other hand, if it is too narrow, the effect of concentrating the stress on the extension line of the cut when pulling the knob portion 12 does not work well, and there is a possibility that the strip 32 is difficult to break. On the other hand, if the length Ow is too wide, the stress to be concentrated is dispersed and difficult to break. Therefore, 70% or less is preferable, and 60% or less is more preferable.

  A distance Cw between the pair of cuts 13 and 13 is preferably 20% or more, and more preferably 30% or more of the length Bw of the end portion 15 of the easy-opening palm bag 11. Since the gap between the cuts 13 and 13 is picked, if it is too narrow, it will be difficult to break with force. On the other hand, even if it is too wide, stress is dispersed and it is difficult to break, so 70% or less is preferable, and 60% or less is more preferable.

  The ratio of the length Ow of the bottom 28 of the recess 27 and the distance Cw between the pair of cuts 13 and 13 is preferably 2: 1 to 1: 2, and more preferably 4: 3 to 3: 4. Preferably, the closer the value, the more preferable. If the values of Ow and Cw are too different, even if each value is within the above range, the easy-opening effect realized by combining the cut and the recess may not be sufficiently exhibited.

  The pair of cuts 13, 13 do not necessarily have to be perpendicular to the edge of one end 15, but are inward from the boundary lines 33, 33 between the recess 27 and the side portions 29. Is preferred. In particular, even inside the boundary lines 33, 33, it is particularly easy to break if it is near the corners 34, 34 at both ends of the base 28. This is because, if the corners 34 and 34 are not close to each other, the band-like piece 32 having a good tear when it is torn is not formed, and it may be difficult to break due to distortion. When the cuts 13 and 13 are not perpendicular to the edge of one end 15, the interval Cw is the width between the deepest cuts.

  Further, the depth Ch of the pair of cuts 13 and 13 needs to be a length at which the knob 12 can be picked with a finger at least when it begins to break, and specifically, it is preferably 4 mm or more. More preferably, it is 6 mm or more. On the other hand, it is possible to cut only up to the length of the bottom 28 of the recess 27 at the maximum, and if it is too long, it may be caught during transportation and unintentionally torn, so it is preferably 3 cm or less, and 2 cm or less. Is more preferable.

  On the other hand, both side portions 29 of the heat seal portion 17 preferably have a length Sl from the edge of one end portion 15 of 5 mm or more, and more preferably 7 mm or more. It is because it is preferable that it is the length which can ensure the said knob | pick part 12 at least. On the other hand, even if it is too far away, the corresponding sheet is useless and clunky, so it is preferably 2 cm or less.

  Further, the depth Oh of the recess of the recess 27 formed in the heat seal part 17 is preferably 4 mm or more, and more preferably 6 mm or more. This is because if it is too short, the stress concentration effect due to the presence of the recess 27 becomes insufficient. On the other hand, even if it is deeper than 2.0 cm, the effect is hardly changed, so that it is preferably 2 cm or less, and more preferably 1.5 cm or less.

  Furthermore, both side portions 29 of the heat seal portion 17, that is, the width Sh in the both ends of the portion that is not recessed must be at least longer than Oh, and the bottom portion of the recess 27 needs to have a minimum strength. Therefore, (Sh-Oh) is preferably 3 mm or more, and more preferably 5 mm or more. On the other hand, if (Sh-Oh) is too long, it will be difficult to peel off, so it is preferably 1.5 cm or less, and more preferably 1.0 mm or less.

  The lateral width Bw of the easy-opening palm bag according to the present invention is not particularly limited, but if it is too small, the width of the strip 32 cannot be sufficiently secured, and therefore it is preferably 5 cm or more. On the other hand, even if it is large, it can be implemented, but if the width exceeds 30 cm, the effect as a preferable range of the above Ow and Cw cannot be expected. In that case, it is preferable that Ow and Cw are 10 cm or less irrespective of Bw.

  As described above, the sheet 21 used in the present invention is a sheet in which a thermoplastic resin film is arranged on at least one surface, and may be a single-layer sheet made of only a thermoplastic resin film, or may be a thermoplastic resin film. May be a film in which a paper sheet such as Japanese paper or an aluminum foil is laminated. As the thermoplastic resin, a general thermoplastic resin such as a polyolefin such as polyethylene or polypropylene, or an ethylene-vinyl acetate copolymer can be used. For example, an easy-opening type resin film called an easy peel film can be used. The thickness of the thermoplastic resin film needs to be at least heat-sealable.

  The thermoplastic resin film is preferably stretched at least in a uniaxial direction. In the case where the film is stretched in the biaxial direction, one of them is preferably stretched more strongly. In producing the easy-opening palm bag 11 from the sheet 21, the strip-shaped piece 32 can be easily torn off by arranging the stretched direction or the direction of stronger stretching in the both end directions.

  It is preferable that the adhesive strength of the heat seal portion 17 is adjusted so that the unsealing strength at the time of unsealing becomes 2 N / 15 mm or more and 10 N / 15 mm or less. If it is this range, when tearing the strip | belt-shaped piece 32, it can peel comparatively easily. More specifically, the strength may be adjusted according to the main consumer layer of the article 31 to be sealed.

  As an embodiment other than the above-described embodiment, an embodiment in which a concave portion is also provided in the heat seal portion 18 of the other end portion 16 is raised. Thereby, when it is easier to take out the article 31 later when the strip 32 is completely removed, the portion that must be peeled off from the heat seal portion 18 is shortened, so that the torn portion can be completely removed from the bag. It becomes easy.

Daio Paper Co., Ltd. rayon paper (Dio M: 14 g / m ² ), low-density polyethylene (thickness: 15 μm), Mitsubishi Plastics Co., Ltd .: biaxially stretched gas barrier nylon film (Super Neil 15 μm), Using a composite sheet (17.8 cm long × 23.0 cm wide) in which low density polyethylene (thickness: 15 μm) and J film Co., Ltd .: easy peel film: VMX 30 μm were laminated in order, both sides 1.0 cm Each was heat-sealed face-to-face to form a palm-bonded part, and a bag was made as a cylinder according to the above procedure.

  The depth of the buttocks was 1.5 cm and the lateral width was 7.5 cm. The depth Ch of the cuts was 1.0 cm, and the gap Cw was 3.4 cm. The recess depth Oh was 1.0 cm, the recess bottom width Ow was 3.6 cm, and the widths Sh in both ends of both side portions were 2.0 cm.

  Four such bags were prepared, and the gaps between each of the bags were picked, and opening was attempted. The unsealing strength when peeling the heat seal part from the recess was 17.3 N / 34 mm, 17.5 N / 34 mm, 17.1 N / 15 mm, and 17.4 N / 34 mm, respectively, and the average value was 17.3 N / 34 mm. . This was converted to 7.6 N / 15 mm.

(Example 1, Comparative Examples 1-3)
Only the one end was sealed as in the above example, and a sample bag was prepared that did not adhere to the other end. This is Example 1. Compared to Example 1, except that no cuts are made, Comparative Example 1 and Example 1 have the same configuration except that the heat seal portion has a simple rectangular shape without providing a recess. A bag was produced in each form of Comparative Example 3 having the same structure as Comparative Example 2 and Example 1 except that no cuts were made and no recess was provided in the heat seal part. About these Example 1 and Comparative Examples 1-3, the picking part was pulled by hand so that it might become about 17.3N / 34mm, and opening was tried.

  FIG. 10A is a photograph of the bag according to Example 1, and FIG. 10B is a photograph at the time of opening. The left side of FIG. 10A is one end portion, a concave heat seal portion is formed, and a cut is made toward a boundary portion between both sides. By picking and pulling between the cuts, it was possible to easily break the extension line of the cuts and open them to a substantially constant width.

  FIG. 11A is a photograph of the bag according to Comparative Example 1, and the heat seal part is provided with a recess, but there is no cut. The portion corresponding to the break in Example 1 was picked and pulled, but as shown in the photograph shown in FIG. 11 (b), it could not start to tear and could not be opened.

  FIG. 12 (a) is a photograph of the bag according to Comparative Example 2, with a cut, but no recess in the heat seal part. Although it was picked and pulled between the cuts, as shown in the photograph shown in FIG.

  FIG. 13A is a photograph of the bag according to Comparative Example 3, in which no cut is made and no recess is provided in the heat seal portion. Although a portion corresponding to the break in Example 1 was picked and pulled, as shown in the photograph shown in FIG. 13 (b), it could not start to break and could not be opened.

DESCRIPTION OF SYMBOLS 11 Easy opening palm bag 12 Pick part 13 Cut 14 Upper sheet part 15 One edge part 16 The other edge part 17 The heat seal part 18 of one edge part side The heat seal part 21 of the other edge part side Sheet 22 Inner side surface 23 Side edge 24 Joint-bonding part 25 Lower sheet part 26 Gutter part 27 Recess 28 Bottom part 29 Both side parts 30 Opening opening 31 Article 32 Strip piece 33 Boundary line 34 Corner part Bw Joint-bag end width D Joint-bonding part width Cw Interval between cuts Ch Depth of cut Ow Recess bottom width Oh Recess depth Sl Distance to heat seal part Sh Width in both ends of both sides of heat seal part

Claims (9)

By heat-sealing both ends of the sheet that joins the side edges to form a cylindrical shape, it is a palm bag that can seal the article inside,
The edge of one end and the heat seal part are separated by a predetermined distance,
The part between the edge of this one end and the heat seal part forms a knob that can pick one of the two opposing sheet parts,
The heat seal part has a concave shape with a rectangular recess formed in the center part on the knob part side,
An easy-opening palm bag characterized in that a pair of cuts that can be pinched are provided in at least one of the two sheet parts forming the knob part.   2. The palm bag according to claim 1, wherein a bottom width Ow of the concave portion is 20% or more and 70% or less of a length Bw of an end portion of the palm bag.   The joint bag according to claim 1 or 2, wherein a distance Cw between the pair of cuts is 20% or more and 70% or less of an end length Bw of the joint bag.   The palm bag according to any one of claims 1 to 3, wherein a ratio between a bottom side length of the recess and a distance between the pair of cuts is 2: 1 to 1: 2.   The palm bag according to any one of claims 1 to 4, wherein the pair of cuts are directed to the vicinity of corners at both ends of the bottom of the recess.   The joint bag according to any one of claims 1 to 5, wherein the pair of cuts are formed by sandwiching a joint joining portion where the side edges are adhered to each other.   The palm bag according to any one of claims 1 to 6, wherein when the cylinder is formed, a collar part folded inward is formed on a side surface of the cylinder.   The said sheet | seat is a multilayer sheet which distribute | arranged the heat seal layer which consists of polyolefin, an ethylene vinyl acetate copolymer, or its mixture to the inner surface side, and distribute | arranged Japanese paper to the outer surface side. The gas palm bag.   The opening strength necessary to peel off a part of the heat seal part when the part of the sheet part is broken and opened from between the pair of cuts as the knob part is 2 N / 15 mm or more and 10 N / 15 mm or less. A joint bag according to any one of claims 1 to 8.