JP2018002155A - Packing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open an opening by hooking a fingertip on a split of a packing bag.SOLUTION: In a packing bag having a double-layered soft laminate film, a longitudinal seal part formed along its side edge on the mutually overlapped side edges of the laminate film and a lateral seal part respectively formed over the whole width of its laminate film in a position of becoming both end parts of a packing bag of the laminate film and defining a packing object storage space between the double-layered laminate films, a tear flaw is respectively formed in a position for linearly crossing the packing object storage space on the double-layered laminate film, and a wavy tear flaw in one of the double-layered laminate film and a linear tear flaw in the other, are overlapped in at least a part of the position for linearly crossing the packing object storage space.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an easily tearable packaging bag, and in particular, liquids, viscous products, solids, powders, granules, and other packages such as foods and drinks, seasonings, pharmaceuticals, and cosmetics. The present invention relates to an easily tearable packaging bag that can be easily opened and removed.

  In recent years, it has been widely used to automatically fill and package liquids such as foods and drinks, seasonings, pharmaceuticals, and cosmetics, viscous materials or powders, granular materials, and other objects to be packaged with soft packaging films. .

  As shown in FIG. 1, a conventional packaging bag for packaging an article to be packaged as described above includes a base film layer made of, for example, a biaxially stretched ethylene-vinyl alcohol copolymer resin film, and an unstretched ethylene-vinyl, for example. After laminating a laminated film with a sealant layer made of acetate copolymer resin, for example, using an automatic filling bag making machine so that the sealant layers face each other, the laminated film is filled with an object to be packaged. However, it is formed by applying a seal to the periphery.

  In addition, taking out the package from the packaging bag starts tearing of the packaging bag from the I notch provided in the vertical seal part of the packaging bag, and until the position at which the bag tears completely crosses the packaging bag Proceed to open the packaging bag. In general, this is performed by pressing the package storage space of the packaging bag with a hand or a finger to open the packaging bag and extruding the package from the opening (for example, see Patent Document 1).

JP 2012-017118 A

  By the way, when this inventor further examined the handling property of said packaging bag, in the said packaging bag, the position of the tear of a bag corresponds (aligned in the thickness direction) between two laminated films. Therefore, when the packaged item is thin or small, there is no inconvenience that it is not easy to take out the packaged item because once the opening of the packaging bag is closed, there is no place to hang it with your fingertip. It was done.

  The present invention solves the above-mentioned problems of the prior art, and provides a packaging bag that can easily open the opening of the packaging bag and take out the packaged item easily even when the packaged item is thin or small. It is intended to provide.

The packaging bag of the present invention that advantageously solves the above problems is
A two-layer soft laminated film consisting of one film folded in the width direction or two films independent of each other;
A vertical seal portion formed by heat sealing along the side edges of the laminated films on the side edges,
A lateral seal portion formed by heat-sealing in the width direction over the entire width of the laminated film at positions that become both ends of the packaging bag of the laminated film,
With
A space to be wrapped is surrounded by the vertical seal portion and the horizontal seal portion, or the vertical seal portion, the horizontal seal portion, and the folded portion in the width direction. A packaging bag defined by Go,
In the two-layered laminated film, tear creases are respectively formed at positions that linearly cross the package storage space,
In at least a part of a position that linearly crosses the package storage space, a wavy tear fold on one side of the two-ply laminated film and a linear tear fold on the other overlap. is there.

When the present inventor examined the tearing characteristics of various shapes of tears formed on a laminated film by laser processing, the following points were found.
・ If the tear ridge is straight and the tear direction is the same direction as the heel, it will tear along the straight tear heel.
・ When tearing wrinkles are wavy (meandering, zigzag, etc.) lines, they begin to tear along the slope of the wavy line, and if the pitch in the tearing direction or the pitch in the height direction of the wavy line is longer than a certain level, the tearing will deviate from the inclination of the wavy line It tears in the direction without the wrinkles.
・ If a plurality of wavy lines with sufficiently short pitches in the tearing direction or height direction are lined up in the tearing method, even if the tears deviate from the wavy lines, they will go to the wavy lines in the near position along the tearing direction and follow the wavy lines Torn continuously, and the tear maintains a generally constant direction.
・ Even if the tear rupture consists of a large number of intermittent linear holes, it is presumed to have the same tear characteristics as a continuous tear crease.

  The present invention is based on the above-described knowledge, and according to the packaging bag of the present invention, a two-layer laminated film is formed of a wavy tearing flaw that stabilizes the cutting direction at the time of opening and a linear tearing flaw that has good cutting properties. Since each is formed, it has a stable easy-opening property. Moreover, since the tearing creases that overlap each other in the two-layered laminated film are always linear and corrugated, the tears in the two-layered laminated film do not have the same shape, and therefore the positions of the tears in the packaging bag do not match. Even when the package is thin or small, the opening of the packaging bag can be easily opened by putting a fingertip on the tear, and the package can be easily taken out.

In the packaging bag of the present invention,
(1) The tear ridge may be formed of a roll having a fine cutting edge or abrasive grains, but the tear ridge is formed in a groove shape by laser processing on the two-layer laminated film, Since laser processing can perform groove processing with a stable depth at a high speed on a laminated film, a packaging bag having a tear bag according to the present invention can be performed at a high speed by a bag making machine or an automatic filling and packaging machine.

(2) The wavy tearing ridge may have a sawtooth shape with one side extending in a direction orthogonal to the tearing direction, but the wavy tearing ridge is alternately reversed arc-shaped, alternately reversed V-shaped, triangular wave-shaped and / or Or, if it is sinusoidal, there is little or no tear ridge extending in the direction orthogonal to the tearing direction.For example, when the bag is made with a bag making machine or an automatic filling and packaging machine, the feeding direction of the laminated film is defined as the tearing direction. In this case, a tearing fold can be easily formed by laser processing on a laminated film which is fed at high speed by the bag making machine or automatic filling and packaging machine.

(3) The tear folds may be formed one by one on the two-layer laminated film. However, when a plurality of tear folds are arranged in at least one of the two-layer laminated films, any one along the tear direction Since the tear ridge is torn, the tear can be reliably formed along the tear direction.

(4) When the crest and trough of the wavy tearing ridge are separated, the pitch between the crests of the crest and the pitch between the bottom of the trough and the crest of the crest are increased. In addition, since it is not necessary to connect the crest and trough, it is possible to avoid an increase in the processing time of the tear ridge.

(5) If the tear ridge has straight portions and wavy portions alternately in the tearing direction, the straight portions can be laser processed at a higher speed than the wavy portions. It is possible to shorten the processing time of the hit tear and improve the bag making speed. Here, a tear having alternating straight portions and wavy portions in the tearing direction is formed on both of the two-layered laminated film, even though it is formed on both of the two-layered laminated film. It is sufficient if most of the wavy portions on the other side overlap each other, and several waves at both ends of the wavy portions of the two-layer laminated film may overlap each other.

(6) If the pitch between the crests of the corrugated tear ridge is less than 0.3 mm, it will be difficult to form irregularities in the tear, and if it exceeds 15.0 mm, the tear will easily come off from the tear fold. , Preferably 0.3 mm to 15.0 mm, more preferably 0.5 mm to 10.0 mm,

(7) If the pitch (height) between the bottom of the trough portion and the top of the peak portion of the wavy tearing trough is less than 0.3 mm, it becomes difficult to form irregularities in the crevice, and when it exceeds 3.5 mm Since the tear is easily detached from the tear crease, it is preferably 0.3 mm to 3.5 mm, and more preferably 0.5 mm to 3.0 mm.

(8) When the packaging bag is a self-supporting pouch having a bifurcated folded portion, the opened packaging bag can be kept free, and the opening of the packaged product can be easily opened. Together, the convenience of the packaging bag can be enhanced.

(A) And (b) is the front view and back view which show one Embodiment of the packaging bag of this invention. (A) is explanatory drawing which expands and shows a part of wavy tearing bag in the packaging bag of embodiment shown in FIG. 1, (b) is the description which expands the tearing bag further, and shows the progress state of a tear FIG. (A) And (b) is the front view and back view which show other one Embodiment of the packaging bag of this invention. (A) is explanatory drawing which expands and shows a part of the modification of the wave-like tearing bag in the packaging bag of embodiment shown in FIG. 3, (b) is further expanding the tearing bag, and progress of a tear It is explanatory drawing which shows a state. (A) And (b) is the front view and back view which show another one Embodiment of the packaging bag of this invention. (A) is explanatory drawing which expands and shows a part of wavy tearing bag in the packaging bag of embodiment shown in FIG. 5, (b) is the description which expands the tearing bag further, and shows the progress state of a tear FIG. It is sectional drawing which illustrates the structure of the laminated film used for the packaging bag of each said embodiment.

  Embodiments of the present invention will be described below in detail based on the drawings. 1 (a) and 1 (b) are a front view and a rear view showing an embodiment of the packaging bag of the present invention, and FIG. 2 (a) is a wavy tearing bag in the packaging bag of the embodiment shown in FIG. FIG. 2 (b) is an explanatory diagram showing the progress of the tear by further enlarging the tear fold.

  The packaging bag of this embodiment is composed of a single long film folded at the center in the width direction and two layers of soft laminated films 1 and 2 (overlapping in the paper direction in the figure) with the sealant layers facing each other. A vertical seal portion 3 formed by heat sealing in the longitudinal direction along the side edges of the two soft laminated films 1 and 2 that overlap each other (upper edge in the figure), and the laminated films 1 and 2 A cross section is formed by the bifurcated portion 4 (which overlaps in the direction perpendicular to the paper surface in the figure) formed by pushing the center of the folded end portion inward in the width direction, and the vertical seal portion 3 and the bifurcated portion 4. Horizontal seals formed by heat-sealing in the width direction over the entire width of the laminated films 1 and 2 at positions corresponding to both ends of the packaging bag of the laminated films 1 and 2 formed in a cylindrical shape having a Y-shape. Part 5; A package storage space 6 is defined between the two laminated films 1 and 2 and surrounded by a vertical seal portion 3, a horizontal seal portion 5 and a bifurcated portion 4 to form a self-supporting pouch. It is composed.

  Various methods for manufacturing such a packaging bag are known. For example, the applicant of the present application has also disclosed in Japanese Patent Laid-Open No. 2009-241993. In the method described in this publication, a single laminated film fed out from a roll by an automatic filling and packaging machine is once folded into a U shape at the center in the width direction to form two laminated films 1 and 2 facing each other with sealant layers facing each other. After that, the two side-by-side side edges are heated while being sandwiched between a pair of opposing vertical seal rolls to form the vertical seal portion 3 along the side edges by heat sealing, and the U-shaped folded end portion The center of the film is pushed inward in the width direction to form a bifurcated portion 4, whereby the laminated films 1 and 2 having a cylindrical shape with a Y-shaped cross section are spaced apart from each other in the film feeding direction of the packaging bag. Heat is applied by heat sealing while sandwiching the entire width of the laminated film with a pair or a plurality of pairs of transverse seal rolls that are opposed to each other at the positions corresponding to both ends. The article to be packaged is formed continuously or intermittently by a nozzle inserted into the packaged article storage space 6 in the cylindrical laminated film between the horizontal seal parts 5 through a gap between a pair of vertical seal rolls. Then, the central portion of each horizontal seal portion 5 in the film feed direction is cut with a roll cutter, and packaging bags individually wrapped with the items to be packaged are continuously manufactured.

  By the way, in a packaging bag made of a soft laminated film, since it is usually difficult to tear and open with fingers without any clues, a cut such as a V notch or an I notch is provided in the horizontal seal portion, etc. In many cases, a tear fold is provided at a position crossing the package storage space of the two-layered laminated film connected to the cut, and also in the packaging bag of this embodiment, the cut 7 similar to the V notch is formed in both side seal portions 5. It is formed so that the laminated films 1 and 2 can be easily split by fingers at positions where the cuts 7 of the two laminated films 1 and 2 are connected and linearly traverse the package storage space 6. The tear ridges 8 and 9 are formed.

  In the laminated film 1 on the front side shown in FIG. 1A in the packaging bag of this embodiment, as shown in FIG. A continuous wave-like shape is formed over the entire length of 7, more specifically, a semi-circular arc which is alternately reversed, and two tear arcs 8 which are alternately reversed are formed side by side. Has been.

  When the laminated film 1 on the front side is torn from the left to the right in the drawing at the position of the tear ridge 8, the tear is formed in two of the tear ridges 8 aligned as shown by a bold line in FIG. 2 (b). There is a tendency to continue along one line (upper side in the figure), so that it can be reliably torn at the position of any tear ridge 8.

  Moreover, in the laminated film 2 on the back side shown in FIG. 1B in the packaging bag of this embodiment, the tearing ridge 9 is continuous over the entire length between the notches 7 of the lateral seal portions 5 as shown in the figure. Only one is formed in a straight line. The tear ridge 8 of the laminated film 1 on the front side and the tear ridge 9 of the laminated film 2 on the back side extend so as to substantially overlap in the thickness direction of the packaging bag (the direction perpendicular to the paper surface in the figure). Note that a plurality of the linear tearing ridges 9 may be formed side by side. In that case, two to three are preferable because they are easy to process.

  These tear ridges 8 and 9 in the packaging bag of this embodiment are arranged side by side at a position where the laminated film stably travels upstream in the film feeding direction from the position of the vertical seal roll of the automatic filling and packaging machine, for example. The two laser light irradiators of, for example, carbon dioxide lasers irradiate the laminated films 1 and 2 respectively, and are formed by laser processing with laser light L as shown in FIG.

  FIG. 7 is a cross-sectional view illustrating the configuration of the laminated films 1 and 2 used in the packaging bag of this embodiment. The laminated films 1 and 2 are, for example, the sealant layer S, the first intermediate layer M1, and the second intermediate layer, respectively. The layer M2 and the surface layer F are bonded and laminated, the sealant layer S is made of, for example, liquid crystal polymer (LCP), the first intermediate layer M1 is made of, for example, aluminum foil (ALH), and the second intermediate layer M2 is, for example, stretched It is made of nylon (ONY), and the surface layer F can be made of, for example, polyethylene terephthalate (PET).

  According to the experiment of the present inventor, the tear ridges 8 and 9 formed on the laminated films 1 and 2 having the above-described structure cut the surface layer F with, for example, laser light L as shown in FIG. It has been confirmed that when the intermediate layer M2 is cut to an intermediate depth, the tearability is good and the tear is difficult to come off from the tear crease.

  When the packaging bag of this embodiment is torn with fingers, for example, from the left incision 7 to the right incision 7 in the figure, there are two tears on the laminated film 1 side as shown by the thick line in FIG. 2 (b). It is formed along one (in the figure, the upper side) of the alternately reversed arc-shaped tear ridges 8 arranged side by side, and is formed linearly along the linear tear ridge 9 on the laminated film 2 side.

  Therefore, according to the packaging bag of this embodiment, the tears in the opening are alternately reversed arcs on the laminated film 1 side, and are linear on the laminated film 2 side, and the position of the packaging bag tear is a two-ply laminate. Since the thicknesses of the films 1 and 2 do not match, even when the packaged item is thin or small, the opening of the packaging bag can be easily opened by placing the fingertip on the tear and the packaged item can be easily removed. it can.

  Moreover, according to the packaging bag of this embodiment, since the bifurcated portion 4 serving as the bottom is a self-supporting pouch, the opened packaging bag can be made to stand on its own. Combined with the ease of opening, the convenience of the packaging bag can be enhanced.

  3 (a) and 3 (b) are a front view and a rear view showing another embodiment of the packaging bag of the present invention, and FIG. 4 (a) is a wavy shape in the packaging bag of the embodiment shown in FIG. FIG. 4B is an explanatory diagram showing a partially enlarged version of the tear fold, and FIG. 4B is an explanatory diagram showing the progress state of the rip by further expanding the tear fold.

  The packaging bag itself of this embodiment, like the packaging bag of the previous embodiment, is composed of a single long film folded at the center in the width direction and is a two-layered soft laminated film 1 in which the sealant layers face each other. 2 (overlapping in the drawing in the drawing) and the two soft laminated films 1 and 2 are formed by heat sealing in the longitudinal direction along the side edges (upper edges in the drawing) of the two laminated soft films 1 and 2. The vertical seal portion 3 and the bifurcated portion 4 formed by pushing the center of the folded end portion of the laminated films 1 and 2 inward in the width direction (overlapping in the direction perpendicular to the paper surface in the figure), Over the entire width of the laminated films 1 and 2 at positions where both ends of the packaging bag of the laminated films 1 and 2 formed in a cylindrical shape having a Y-shaped cross section by the seal portion 3 and the bifurcated portion 4 are formed. By heat sealing in the width direction Each of which is formed with a horizontal seal portion 5, and a package storage space 6 is provided between the two laminated films 1 and 2, and is surrounded by the vertical seal portion 3, the horizontal seal portion 5, and the forked portion 4. Thus, a self-standing pouch is formed, and for example, the bag can be made in the same manner as the packaging bag of the previous embodiment.

  However, in the laminated film 1 on the front side shown in FIG. 3A in the packaging bag of this embodiment, the tearing ridge 8 is continuously waved over the entire length between the cuts 7 of the lateral seal portions 5, more specifically. It is made up of crests and troughs that are alternately connected to each other and are connected to each other to form a substantially V-shape, and two tearing ridges 8 that are alternately reversed in the shape of V. Is formed. Instead of the continuous substantially V-shape, the tear ridge 8 is continuously extended over the entire length between the cuts 7 of the lateral seal portions 5 as shown in a partially enlarged view in FIG. It may consist of wavy, more specifically V-shaped peak portions 8a and valley portions 8b that are alternately opposite and spaced apart from each other. In this embodiment, two are formed side by side.

  When the laminated film 1 on the front side is torn from the left to the right in the drawing at the position of the tear ridge 8, two tears are arranged as shown by a thick line in FIG. Along with any one of the tear ridges 8, it continues between the peak portions 8 a or the valley portions 8 b, and tends to short between the hypotenuses without passing through the top of the peak portions 8 a or the bottom of the valley portions 8 b. Therefore, it can be surely torn at the position of any tear ridge 8. In the case of the tearing rivet 8 shown in FIG. 3A, which is connected to each other and has a substantially V-shape, there is a tendency that a similar tear occurs.

  Further, in the laminated film 2 on the back side shown in FIG. 3 (b) in the packaging bag of this embodiment, as shown in the figure, the tear ridge 9 is continuous over the entire length between the cuts 7 of the both side seal portions 5. Only one is formed in a straight line. The tear ridge 8 of the laminated film 1 on the front side and the tear ridge 9 of the laminated film 2 on the back side extend so as to substantially overlap in the thickness direction of the packaging bag (the direction perpendicular to the paper surface in the figure). Note that a plurality of the linear tearing ridges 9 may be formed side by side in the same manner as in the previous embodiment. In that case, two to three are preferable because they are easy to process.

  For example, when the packaging bag of this embodiment is torn with fingers from the left notch 7 to the right notch 7 in the figure, two tears are formed on the laminated film 1 side as indicated by bold lines in FIG. It is formed along one of the alternately reversed V-shaped tear ridges 8 arranged side by side, and is formed linearly along the linear tear ridge 9 on the laminated film 2 side.

  Therefore, according to the packaging bag of this embodiment, the opening tear is a continuous trapezoidal shape on the laminated film 1 side, is a straight line on the laminated film 2 side, and the laminated film has a two-layer laminated tearing position. Since the thickness does not match in the thickness direction of 1 and 2, even when the package is thin or small, the opening of the packaging bag can be easily opened by placing the fingertip on the tear, and the package can be easily taken out .

  Moreover, according to the packaging bag of this embodiment, since the bifurcated portion 4 serving as the bottom is a self-supporting pouch, the opened packaging bag can be made to stand on its own. Combined with the ease of opening, the convenience of the packaging bag can be enhanced.

  5 (a) and 5 (b) are a front view and a rear view showing another embodiment of the packaging bag of the present invention, and FIG. 6 (a) is a wavy shape in the packaging bag of the embodiment shown in FIG. FIG. 6B is an explanatory view showing a part of the tear fold enlarged, and FIG. 6B is an explanatory view showing the state of progress of the rip by further expanding the tear fold.

  The packaging bag itself of this embodiment, like the packaging bag of the previous two embodiments, consists of a single long film folded at the center in the width direction and a two-layer soft laminated film in which the sealant layers face each other. 1 and 2 (overlapping in the drawing direction in the drawing), and the two soft laminated films 1 and 2 on the side edges (upper edges in the figure) that are overlapped with each other by heat sealing in the longitudinal direction along the side edges The formed vertical seal portion 3 and the forked portion 4 formed by pushing the center of the folded end portion of the laminated films 1 and 2 inward in the width direction (in the figure, overlapped in a direction perpendicular to the paper surface); The laminated films 1 and 2 formed in a cylindrical shape having a Y-shaped cross section by the vertical seal portion 3 and the bifurcated portion 4 are positioned at both ends of the packaging bag at the full width of the laminated films 1 and 2. Across the width Each having a horizontal seal portion 5 formed between the two laminated films 1 and 2, and a space 6 to be packaged is surrounded by the vertical seal portion 3, the horizontal seal portion 5, and the bifurcated portion 4. It is enclosed and defined to form a self-supporting pouch, and can be made in the same manner as the packaging bag of the previous two embodiments, for example.

  However, in the laminated film 1 on the front side shown in FIG. 5 (a) in the packaging bag of this embodiment, the tear ridge 8 is shown on both lateral seal portions 5 as shown in a partially enlarged view in FIG. 6 (a). A wave-like portion 8c and a straight-line portion 8d are alternately repeated over the entire length between the cuts 7, and more specifically, the wave-like portion 8c has a triangular wave shape. Two tearing rivets 8 having alternating portions 8c and linear portions 8d are formed side by side.

  When the laminated film 1 on the front side is torn from the left to the right in the figure at the position of the tear ridge 8, the tear proceeds along one of the two tear ridges 8 arranged in a straight line. As shown by the thick line in FIG. 6 (b), the triangular wave portion continues along the straight line in the direction of the top or bottom, and when the adjacent hypotenuse approaches, the triangular wave top or bottom There is a tendency to short-circuit between the hypotenuses without passing through, so that it can be reliably torn at any of the tear ridges 8.

  Moreover, in the laminated film 2 on the back side shown in FIG. 5B in the packaging bag of this embodiment, the tearing ridge 9 is continuous over the entire length between the cuts 7 of the lateral seal portions 5 as shown in the figure. Only one is formed in a straight line. The tear ridge 8 of the laminated film 1 on the front side and the tear ridge 9 of the laminated film 2 on the back side extend so as to substantially overlap in the thickness direction of the packaging bag (the direction perpendicular to the paper surface in the figure). Note that a plurality of the linear tearing ridges 9 may be formed side by side in the same manner as in the previous embodiment. In that case, two to three are preferable because they are easy to process.

  When the packaging bag of this embodiment is torn with fingers, for example, from the left incision 7 to the right incision 7 in the figure, there are two tears on the laminated film 1 side, as shown by the thick line in FIG. 6 (b). A straight and continuous trapezoidal shape is formed along one of the tearing rivets 8 arranged side by side, and a linear shape is formed along the straight tearing ridge 9 on the laminated film 2 side.

  Therefore, according to the packaging bag of this embodiment, the opening tears are alternately linear and continuous trapezoidal on the laminated film 1 side, and linear on the laminated film 2 side, and the position of the packaging bag tears Is not the same in the continuous trapezoidal portion corresponding to the wavy portion 8c in the thickness direction of the two laminated films 1 and 2, so even if the packaged items are thin or few, hang your fingertip on the tear Thus, the opening of the packaging bag can be easily opened and the packaged item can be easily taken out.

  Moreover, according to the packaging bag of this embodiment, since the bifurcated portion 4 serving as the bottom is a self-supporting pouch, the opened packaging bag can be made to stand on its own. Combined with the ease of opening, the convenience of the packaging bag can be enhanced.

(Example)
Regarding the tearability of each tear bag 8 on the laminated film 1 side of the packaging bag of these embodiments, Table 1 shows the results of the test conducted by the inventors of the present invention by changing the pitch P in various ways, and the height H is changed in various ways. Table 2 shows the test results.

  From these Tables 1 and 2, when the pitch P between the crests of the tear ridge 8 is less than 0.3 mm, it is difficult to form irregularities in the rift, and when it exceeds 15.0 mm, the rift is separated from the tear ridge. Since it becomes easy, it turns out that it is preferable that it is 0.3 mm-15.0 mm, and that it is more preferable if it is 0.5 mm-10.0 mm, and also the bottom of the trough part of the tear ridge 8 and the top of a peak part When the height H is less than 0.3 mm, it becomes difficult to make irregularities in the crevice, and when it exceeds 3.5 mm, the crevice tends to come off from the tearing flaw, so it is preferably 0.3 mm to 3.5 mm, It was found that 0.5 mm to 3.0 mm is more preferable.

  As mentioned above, although demonstrated based on the example of illustration, the packaging bag of this invention is not limited to the above-mentioned embodiment, It can change suitably within the description range of a claim, for example, lamination | stacking of a front side The tear ridge 8 on the film 1 side and the tear ridge 9 on the laminated film 2 side on the back side may be reversed. Also, the tear film 8 on the laminated film 1 side and the tear film 9 on the laminated film 2 side are both alternately arranged in the tear direction with the wavy portions 8c and the straight portions 8d similar to the tear film 8 shown in FIG. As long as most of the linear portions 8d on one side of the laminated films 1 and 2 overlap most of the wavy portions 8c on the other side, the laminated films 1 and 2 are substantially double stacked. It is sufficient that the tears do not have the same shape, and several waves at both ends of the wavy portions 8c of the two-layer laminated films 1 and 2 may overlap each other.

  Further, in the packaging bag of the present invention, for example, at least one of the tear ridge 8 on the laminated film 1 side and the tear ridge 9 on the laminated film 2 side may be formed of a roll having a fine cutting edge or abrasive grains. . Further, the wavy or linear tearing ridges 8 and 9 may be formed as ridges that are not continuous but finely interrupted. The tear ridges 8 and 9 may be located between the vertical seal portion 3 and the bifurcated portion 4 as long as they are linearly crossing the package storage space 6. In this case, only the vertical seal portion 3 is provided. A cut 7 is formed. Further, the tear ridges 8 and 9 may be positioned so as to obliquely cross the packaged article storage space 6 between the vertical seal portion 3 and the horizontal seal portion 5.

  Furthermore, in the packaging bag of the present invention, for example, the two-layered soft laminated films 1 and 2 forming the packaging bag may be composed of, for example, two independent films, and in that case, two vertical seals are provided. You may make it surround the to-be-packaged goods storage space 6 with the four-way seal | sticker comprised by the part 3 and the two horizontal seal | sticker parts 5. FIG. In addition, it is composed of a single long film folded at the central portion in the width direction, and the center of the folded end portion of the double-layered soft laminated film facing the sealant layers is left without being pushed into the vertical seal portion 3 and two places The package storage space 6 may be surrounded by the three-side seal formed by the horizontal seal portion 5 and the folded portion.

  Further, in the packaging bag of the present invention, a re-sealable chuck may be provided at a position inside the tear bag, and in this way, the chuck bag can be easily closed once the opening is opened and then the chuck is closed. The opening and the chuck are opened again, and the package can be easily taken out.

  The packaging bag of the present invention can also be applied to a packaging bag manufactured by a bag making machine and filling the contents separately. In this case, for example, the vertical seal portion 3 is a top seal portion (top portion). ), The lateral seal portion 5 is a side seal portion (side seal portion), and the bifurcated portion 4 is a bottom portion (bottom bifurcated portion).

  Thus, according to the packaging bag of the present invention, a wave-like tearing flaw that stabilizes the cutting direction at the time of opening and a linear tearing flaw that has good cutting properties are formed in the two-layered laminated film, respectively, so that it can be easily opened easily. It has sex. Moreover, since the tearing creases that overlap each other in the two-layered laminated film are always linear and corrugated, the tears in the two-layered laminated film do not have the same shape, and therefore the positions of the tears in the packaging bag do not match. Even when the package is thin or small, the opening of the packaging bag can be easily opened by putting a fingertip on the tear, and the package can be easily taken out.

DESCRIPTION OF SYMBOLS 1 Front side laminated film 2 Back side laminated film 3 Vertical seal part 4 Fork part 5 Horizontal seal part 6 Package storage space 7 Notch 8,9 Tears 8a Mountain part 8b Valley part 8c Wave-like part 8d Linear part P Pitch H Height L Laser light F Surface layer M1 First intermediate layer M2 Second intermediate layer S Sealant layer

Claims (9)

A two-layer soft laminated film consisting of one film folded in the width direction or two films independent of each other;
A vertical seal portion formed by heat sealing along the side edges of the laminated films on the side edges,
A lateral seal portion formed by heat-sealing in the width direction over the entire width of the laminated film at positions that become both ends of the packaging bag of the laminated film,
With
A space to be wrapped is surrounded by the vertical seal portion and the horizontal seal portion, or the vertical seal portion, the horizontal seal portion, and the folded portion in the width direction. A packaging bag defined by Go,
In the two-layered laminated film, tear creases are respectively formed at positions that linearly cross the package storage space,
A packaging bag characterized in that a wave-shaped tear fold on one side of the two-layer laminated film and a linear tear fold on the other overlap at least a part of a position that linearly crosses the package storage space .   The packaging bag according to claim 1, wherein the tear bag is formed in a groove shape by laser processing on the two-layer laminated film.   The packaging bag according to claim 1 or 2, wherein the corrugated tear folds are alternately reversed arcs, alternately reversed V shapes, triangular waves and / or sine waves.   The packaging bag according to any one of claims 1 to 3, wherein a plurality of the tear folds are arranged in at least one of the two-ply laminated films.   The packaging bag according to any one of claims 1 to 4, wherein the wave-shaped tearing ridge is separated from a peak portion and a valley portion.   The packaging bag according to any one of claims 1 to 5, wherein the tear bag has wave-like portions and linear portions alternately in the tear direction.   The packaging bag according to any one of claims 1 to 6, wherein a pitch between ridges of the crests of the wavy tearing ridge is 0.3 mm to 15.0 mm.   The height between the bottom of the valley part of the wavy tearing ridge and the top of the peak part is 0.3 mm to 3.5 mm, according to any one of claims 1 to 7, Packaging bag.   The packaging bag according to any one of claims 1 to 8, wherein the packaging bag is a self-standing pouch in which the folded portion is bifurcated.

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