JP2018070209A - Package bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package bag in which an easiness peeled portion is easily peeled, and which can easily perform a flow control at the time of extraction of a packaged object after peeling.SOLUTION: A package bag in which a storage space for a packaged object is formed between lamination layer films comprises: a vertical seal portion which comprises a piece of lamination layer film turned in the width direction or a plurality of lamination layers being mutually independent, and which is formed by heat sealing along a side margin on the side margin of the lamination layer films duplicated mutually; and a horizontal seal portion which is formed over overall width of the lamination layer film at a position of both ends of the package bag of the lamination layer. A package bag is characterized in that an easiness peeled portion is provided in a seal portion as either the vertical seal portion or the horizontal seal portion, or an intersection portion of these seal portions, and a thin hole is formed in the easiness peeled portion.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an easy-open packaging bag, and in particular, is applied to packaging of liquid materials such as foods and drinks, seasonings, pharmaceuticals, and cosmetics, and other viscous or other liquid materials. The present invention relates to an easily openable packaging bag that can be easily opened and taken out.

  In recent years, it has been widely used to wrap liquids such as foods and drinks, seasonings, pharmaceuticals, and cosmetics, or other viscous products such as liquids, and the like to be packaged with fluidity.

  For example, in the case of a three-side sealed bag, the conventional packaging bag for packaging the above-mentioned packaged object is, for example, a base film layer made of a biaxially stretched ethylene-vinyl alcohol copolymer resin film and, for example, unstretched ethylene. -A soft laminated film in which a sealant layer made of vinyl acetate copolymer resin is laminated, for example by an automatic filling bag making machine, is folded at the center in the width direction so that the sealant layers face each other, and the two side edges are overlapped to overlap each other. Then, for example, as shown in FIG. 5 (a), the vertical seal portion 2 is formed by heat sealing along the overlapped side edge (left side edge in the figure) of the laminated film 1, and the stacked layers are stacked. A horizontal seal portion 3 is formed by heat sealing over the entire width of the laminated film 1 intermittently along the longitudinal direction of the film 1. During intermittent formation of the seal part 3, a packaged article is filled between two laminated films 1 and surrounded by the vertical seal part 2, the horizontal seal part 3 and the folded end part 4 It is formed by storing an object to be packaged in the object storage space 5.

  Further, for example, as shown in FIG. 5 (a), the packaged article is taken out from the packaging bag, as shown in FIG. 5 (a), either of the vertical seal part 2 and the horizontal seal part 3 around the packaged article storage space 5. Then, an easy peeling portion 6 is provided in the vertical seal portion 2), and fluid pressure is generated in the packaged item in the packaged item storage space 5 by pressing the packaging bag with a finger or the like when the packaged item is taken out. Then, the packaging bag is opened by peeling the easily peelable portion 6 from the side edge on the package storage space 5 side (inner side) to the opening 7 on the opposite side (outer side) with the fluid pressure, This is performed by extruding an object to be packaged from the opening 7 (for example, see Patent Document 1 relating to the application of the present applicant).

JP-A-2006-055588

  By the way, when this inventor further examined about said packaging bag, in this packaging bag, as shown to Fig.5 (a), the width | variety of the opening 7 which consists of the easily peelable part 6 provided in the vertical seal | sticker part 2 Is significantly narrower than the total length of the vertical seal portion 2, an inconvenience is found that the easily peelable portions 6 are constrained by the normal seal portions 9 on both sides and are difficult to peel to the opening 7. As shown in FIG. 5 (b), when the width of the opening 7 made of the easy peeling portion 6 provided in the vertical seal portion 2 is widened to near the entire length of the vertical seal portion 2, the easy peeling portions 6 are usually located on both sides. Although it is difficult to be restrained by the seal portion 9, it is easy to peel off to the opening 7, but the inconvenience that the flow rate from the opening 7 of the packaged object after peeling of the easily peelable portion 6 becomes too large has been found.

  On the other hand, as shown in FIG. 5 (c), when the entire vertical seal portion 2 is made an easily peelable portion 6 and a hole 8 is provided at the center in the longitudinal direction of the easily peelable portion 6 with a perforation or the like. When the peeling of the easy peeling portion 6 started from the package storage space 5 side reaches the pore 8 as shown in the figure, the packaging material starts to flow out of the pore 8, and once the outflow starts, the peeling is started. It was found that the area did not spread any further, and that the package continued to flow out only from the area where the outflow began first. In view of the above-described knowledge, the present invention provides a packaging bag that solves the problems of the prior art, easily peels off easily peeled portions, and easily adjusts the flow rate at the time of dispensing the packaged material after peeling. The purpose is that.

The packaging bag of the present invention that advantageously solves the above problems is
It consists of a single laminated film folded in the width direction or a plurality of independent laminated films,
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 for storing an object to be packaged between the laminated films is surrounded by the vertical seal portion and the horizontal seal portion, or the vertical seal portion, the horizontal seal portion, and one folded portion in the width direction. Or surrounded by the horizontal seal portion and the two folded portions in the width direction and the vertical seal portion is disposed between the folded portions, and is defined as a packaging bag,
An easily peelable portion is provided at any one of the vertical seal portion and the horizontal seal portion or at the intersection of the seal portions,
A pore is formed in the easily peelable portion.

  In such a packaging bag of the present invention, when the package is taken out, pressure is applied to the package in the package storage space by pressing the package storage space of the package bag with fingers or the like. When the easy-release part is peeled off from the package storage space side by the fluid pressure, the package starts to flow out of the pore when the peeling reaches the pore, and once the flow starts, the cover is peeled off. As the fluid pressure of the package decreases, the peeled portion does not spread any further, and the packaged item continues to flow out only from the portion where the outflow starts first.

  Therefore, according to the packaging bag of the present invention, pores are formed in any one of the vertical seal portion and the horizontal seal portion or in an easily peelable portion provided at the intersection of the seal portions. Therefore, even if it is somewhat easy to cause peeling of the easily peeled portion due to fluid pressure of the package, when the peeling reaches the pores, the package flows out and further spread of the peeling occurs. Since it becomes difficult, it is possible to easily adjust the flow rate at the time of dispensing the package after peeling, and it is possible to effectively prevent the flow rate from being excessively increased.

  In the present invention, the pores may be formed at least in the central portion in the longitudinal direction of the easy-peeling portion. In this way, the peeling of the easy-peeling portion starts from the central portion in the longitudinal direction. Since it starts, peeling can easily reach the pores and the packaged material can easily flow out.

  Further, in the present invention, the seal portion provided with the easily peelable portion is a normal seal portion that extends over the entire length of the seal portion along the side edge opposite to the packaged article storage space side. In other words, it may have a seal part with higher sealing strength than the easy peel part, and in this way, even if the easy peel part is peeled off excessively by accidentally pressing the packaging bag too much, the normal seal part is Since the object to be packaged flows out only from the pores without being peeled off, it is possible to reliably prevent an excessive increase in the flow rate when the object to be packaged is poured out.

  Furthermore, in the present invention, the pores may extend in a perforated manner in a longitudinal direction of any one of the seal portions or in a direction crossing obliquely at an intersection of the seal portions, This is preferable because the number of pores located in the peeling range of the easy-peeling portion can be appropriately changed according to the viscosity of the article to be packaged, the required outflow amount, and the like. In this case, if the length of each pore is relatively shortened, a low-viscosity package can be discharged in an arbitrary amount, and the length of each pore is relatively increased. If the length is made longer, a high-viscosity packaged object or a packaged object in which fluids and solids are mixed can be discharged in an arbitrary amount.

  In the present invention, the pore extends over the entire length in the longitudinal direction at any one of the vertical seal portion and the horizontal seal portion, or at the intersection of the seal portions. If it does in this way, a pore can be easily formed in the case of bag making of a packaging bag.

  Furthermore, in the present invention, the fine pores may be arranged in a plurality of rows in the width direction of any one of the seal portions or the intersecting portions of the seal portions, and in this way, the longitudinal direction of the easily peelable portion Even if the peeling range is not widened, it is possible to allow the packages to flow out in an arbitrary amount by appropriately using the plurality of rows of pores.

  Further, in the present invention, the pores are slits extending intermittently or continuously along any one of the seal portions or intersections of the seal portions, and all of the laminated films stacked. In this way, it is sufficient to penetrate the pores in the entire laminated film, so that the pores can be easily formed.

  Further, in the present invention, the pore is a groove shape intermittently or continuously extending in the longitudinal direction of any one of the seal portions, and does not penetrate only one of the stacked laminated films. Alternatively, a plurality of the laminated films may be penetrated without being aligned in the thickness direction, and in this way, pores can be formed in the laminated film before forming the seal portion. Therefore, formation of pores can be performed easily.

  Furthermore, in the present invention, the pores may be laser processed holes formed in the laminated film, and in this way, perforated pores are easily formed in the laminated film by laser processing. can do.

  Furthermore, in the present invention, the easily peelable portion of the packaging bag may be peeled off at a pushing force of 2 kgf or more and 20 kgf or less when the packaged article storage space is pushed at a pushing speed of 800 mm / min. If it does in this way, an easy peeling part can be easily peeled by the press of the to-be-packaged goods storage space with fingers.

  Furthermore, in the present invention, instead of all or a part of the normal seal portion in the longitudinal direction, the normal seal portion may have a weak seal portion having an intermediate sealing strength between the normal seal portion and the easily peelable portion. Well, in this way, when removing the package, by pressing the package storage space of the packaging bag with fingers etc., the easy peeling part and the weak seal part are peeled in order, so that only the pores In addition, since the object to be packaged can flow out from the weak seal portion, the flow rate can be easily adjusted to increase the flow rate as necessary.

  In the present invention, the weakly sealed portion may be peeled off at a pressing force of 10 kgf or more and 40 kgf or less when the packaged article storage space is pushed at a pushing speed of 800 mm / min. For example, the easy-peeling portion and the weakly sealed portion can be sequentially and easily peeled by pressing the package storage space with a finger.

  In the present invention, the packaging bag can be, for example, a three-side seal bag, a four-side seal bag, a palm (back) bag, a stand (with bottom) pack, a gusset (with gusset) bag, and the like.

(A), (b) and (c) is a front view showing an embodiment of a packaging bag of the present invention, a sectional view taken along line AA in (a), and an explanatory view showing an outflow state of an article to be packaged It is. (A), (b) and (c) is a front view showing another embodiment of the packaging bag of the present invention, a cross-sectional view taken along line BB in (a), and an outflow state of the article to be packaged. It is explanatory drawing. (A), (b) and (c) is a front view showing still another embodiment of the packaging bag of the present invention, a cross-sectional view taken along the line CC in (a) and the outflow state of the article to be packaged. It is explanatory drawing shown. It is a perspective view which shows other one Embodiment of the packaging bag of this invention. (A) And (b) is a front view which respectively shows the packaging bag which has the conventional easy peeling part, (c) is explanatory drawing which shows the peeling state of the easy peeling part of the packaging bag used as the foundation of this invention.

  Embodiments of the present invention will be described below in detail based on the drawings. 1A is a front view showing an embodiment of the packaging bag of the present invention, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. It is explanatory drawing which shows the outflow state of the to-be-packaged item in a packaging bag.

  The packaging bag of this embodiment constitutes a three-sided seal bag. As shown in FIGS. 1A and 1B, for example, a soft laminated film in which a base film layer 1a and a sealant layer 1b are laminated is used. The laminated film 1 is folded at the center in the width direction so that the sealant layers 1b face each other, and both side edges are overlapped to overlap each other (overlapping in the paper surface direction in the figure), and both side edges where the two-layered stacked films 1 overlap ( In the figure, on the left side edge), the longitudinal seal portion 2 formed by heat sealing in the longitudinal direction along the side edge, and the width of the laminated film 1 at the position that becomes both ends of the packaging bag of the two-layer laminated film 1 The two horizontal seal portions 3 that are formed by heat sealing and intersect with both ends in the longitudinal direction of the vertical seal portion 2, and the vertical film of the two-layer laminated film 1. A wrapped end portion 4 which is an end portion on the opposite side of the ridge portion 2 and a vertical seal portion 2, two horizontal seal portions 3 and a folded end portion 4 between two laminated films 1. The object storage space 5 is provided.

  Here, the vertical seal portion 2 has a peeling portion 6 extending in the longitudinal direction along the side edge on the package storage space 5 side (inner side) over the entire length thereof, and on the package storage space 5 side. It has a normal seal portion 9 extending in the longitudinal direction along the side edge opposite to the side edge (outer side), and this normal seal portion 9 has a seal strength of, for example, about 50 N / 15 mm like the horizontal seal portion 3. have. On the other hand, the easily peelable portion 6 has a seal strength of 2 to 20 N / 15 mm, which is lower than the seal strength of the normal seal portion, whereby the easily peelable portion 6 accommodates an object to be packaged at a pushing speed of 800 mm / min. When the space 5 is pushed in, it peels off with a pushing force of 2 kgf or more and 20 kgf or less.

  And in the packaging bag of this embodiment, in the vertical seal part 2, it passes through the width direction center part of the easy peeling part 6, and is comparatively fine over the full length of the vertical seal part 2, for example, perforation shape of 3-5 mm hole pitch, A pore 8 having a relatively short pore length, for example, a pore length of 1.5 to 3 mm and a pore width of 0.2 to 0.5 mm, is formed. As shown in cross section in b), it penetrates the entire thickness of the two-layer laminated film 1.

  The packaging bag of this embodiment includes a base film layer 1a made of, for example, a biaxially stretched ethylene-vinyl alcohol copolymer resin film and a sealant layer 1b made of, for example, an unstretched ethylene-vinyl acetate copolymer resin. The laminated film 1 is folded at the center in the width direction so that the sealant layer 1b faces each other, for example, by an automatic filling bag making machine as described in Patent Document 1, and the two side edges are overlapped to overlap each other. While forming the vertical seal part 2 which has the easy peel part 6 by heat sealing along the side edge (left side edge in the figure) which the laminated | multilayer film 1 overlapped, the width direction direction of the easy peel part 6 of the vertical seal part 2 is substantially. A thin film 8 is formed intermittently in a perforated shape by laser processing over the entire length of the vertical seal portion 2 in the center, and then the laminated film The transverse seal 3 is formed by heat sealing over the entire width of the laminated film 1 intermittently along the longitudinal direction of the laminated film, and the laminated film of two sheets is laminated during the intermittent formation of the transverse seal 3. 1 is formed by filling a packaged article between 1 and storing the packaged article in a packaged article storage space 5 surrounded by the vertical seal part 2, the horizontal seal part 3 and the folded end part 4. Can do.

  Here, the easily peelable portion 6 has, for example, the heat sealing between the films using ultrasonic vibration as described in Patent Document 1 above, or the sandwiching force or heating temperature between the pair of vertical seal rolls. A partially lower heat seal or the like can be used to form a seal strength lower than that of a normal seal portion.

  When taking out the package from the packaging bag of this embodiment, the fluid pressure is generated in the package in the package storage space 5 by pressing the packaging bag with fingers or the like. When the easy peeling portion 6 is peeled off from the package storage space 5 side, as shown in FIG. 1 (c), the peeling is performed at the center of the longitudinal direction of the easy peel portion 6 in the package storage space 5 side. The package P starts to flow out from the pores 8 on both sides of the packaging bag when it reaches the center in the longitudinal direction of the entire length of the pore 8, and once the flow starts, The fluid pressure of the packaged article is reduced, and the peeled portion becomes difficult to spread further, and the packaged article continues to flow out only from the part where the outflow starts first.

  Therefore, according to the packaging bag of this embodiment, since the easy peeling part 6 is provided in the longitudinal seal part 2 so as to extend in the longitudinal direction, the easy peeling part 6 is peeled off by the fluid pressure of the package. Since it can be easily generated, and when the peeling reaches the pores 8, the package P flows out therefrom, and further spreading of the peeling is less likely to occur. An excessive increase in the flow rate can be effectively prevented.

  Furthermore, according to the packaging bag of this embodiment, since the hole length of each of the pores 8 is relatively short, it is possible to smoothly flow out the package with a low viscosity with an appropriate outflow amount. When the amount is reduced, the easy peeling portion 6 may be peeled by weakening the pressing force to the packaging bag so that the number of the pores 8 located in the peeling range of the easy peeling portion 6 is one or a small number. When the amount of outflow is increased, the easy peeling portion 6 may be peeled off by increasing the pressing force on the packaging bag so that the number of the pores 8 located in the peeling range of the easy peeling portion 6 is large.

  And according to the packaging bag of this embodiment, since the seal part 9 normally extends on the outside of the easy peeling part 6, the easy peeling part 6 is peeled off by excessively pressing the packaging bag too much. However, the seal portion 9 does not normally peel off, and the packaged material flows out only from the pores 8, so that it is possible to reliably prevent the flow rate when the packaged product is poured out from being excessively increased.

  Furthermore, according to the packaging bag of this embodiment, the pores 8 are slit-like extending intermittently in the longitudinal direction of the vertical seal portion 2, and as shown in FIG. Since it penetrates all the two sheets, it is sufficient to penetrate the pores 8 without adjusting the depth through the two sheets of the laminated film 1, so that the pores 8 can be easily formed.

  Furthermore, according to the packaging bag of this embodiment, since the pores 8 are laser processed holes formed in the two-ply laminated film 1, the regular laser irradiation head provided in the automatic filling bag making machine is used intermittently. The laminated film 1 can be melted and easily formed by a laser to be irradiated.

  2 (a) is a front view showing another embodiment of the packaging bag of the present invention, FIG. 2 (b) is a sectional view taken along line BB in FIG. 2 (a), and FIG. 2 (c). These are explanatory drawings which show the outflow state of the to-be-packaged item in the packaging bag.

  The packaging bag of this embodiment is different from the previous embodiment only in the length and pitch of the pores 8 and is configured in the same manner as in the previous embodiment in the other points. The difference will be described below. The same parts as those in the embodiment will be described with the same reference numerals.

  That is, the packaging bag of this embodiment also constitutes a three-sided seal bag. As shown in FIGS. 2A and 2B, for example, a soft laminated film in which a base film layer 1a and a sealant layer 1b are laminated, for example. Is folded at the center in the width direction so that the sealant layers 1b face each other, and the laminated film 1 which is overlapped on both side edges and overlapped on both side edges of the two-layered laminated film 1 is elongated along the side edges. Of the vertical seal portion 2 formed by heat sealing over the entire width of the laminated film 1 at the position which becomes both end portions of the packaging bag of the two-layer laminated film 1 and the vertical seal portion 2 formed by heat sealing in the direction. Two transverse seal portions 3 that intersect with both ends in the longitudinal direction, and the folded portion that is the end portion on the opposite side to the longitudinal seal portion 2 of the two-layer laminated film 1 And Part 4, comprises a material to be packaged storage space 5 surrounded by the end portion 4 folded and lateral seal part 3 of 2 and two places their vertical seal portion between the laminate film 1 of the two-ply, a.

  Here, the vertical seal portion 2 has an easy-peeling portion 6 extending in the longitudinal direction along the side edge on the package storage space 5 side (inner side) over the entire length, and the package storage space 5 side. A normal seal portion 9 extending in the longitudinal direction along the side edge opposite (outer side) to the side edge of the normal seal portion 9 is provided, and the normal seal portion 9 is a seal of about 50 N / 15 mm, for example, like the lateral seal portion 3. Has strength. On the other hand, the easily peelable portion 6 has a seal strength of 2 to 20 N / 15 mm, which is lower than the seal strength of the normal seal portion, whereby the easily peelable portion 6 accommodates an object to be packaged at a pushing speed of 800 mm / min. When the space 5 is pushed in, it peels off with a pushing force of 2 kgf or more and 20 kgf or less.

  In the packaging bag of this embodiment, the longitudinal seal portion 2 passes through the widthwise central portion of the easily peelable portion 6 and extends over the entire length of the longitudinal seal portion 2. A fine hole 8 having a perforation of 10 to 15 mm and having a relatively long hole length, for example, a hole length of 8 to 10 mm and a hole width of 0.2 to 0.5 mm is formed. The hole 8 penetrates the entire thickness of the two-layer laminated film 1 as shown in a cross section in FIG.

  Similarly to the previous embodiment, the packaging bag of this embodiment can be formed by, for example, an automatic filling bag making machine as described in Patent Document 1, and the easily peelable portion 6 and the pore 8 here are also It can be formed in the same manner as in the embodiment.

  When taking out the package from the packaging bag of this embodiment, the fluid pressure is generated in the package in the package storage space 5 by pressing the packaging bag with fingers or the like. When the easy peeling part 6 is peeled off from the packaged article storage space 5 side, as shown in FIG. 2C, the peeling occurs at the center part in the longitudinal direction of the easy peelable part 6 side. The package P starts to flow out from the pores 8 on both sides of the packaging bag when it reaches the center in the longitudinal direction of the entire length of the pore 8, and once the flow starts, The fluid pressure of the packaged article is reduced, and the peeled portion becomes difficult to spread further, and the packaged article continues to flow out only from the part where the outflow starts first.

  Therefore, according to the packaging bag of this embodiment, since the easy peeling part 6 is provided in the longitudinal seal part 2 so as to extend in the longitudinal direction, the easy peeling part 6 is peeled off by the fluid pressure of the package. Since it can be easily generated, and when the peeling reaches the pores 8, the package P flows out therefrom, and further spreading of the peeling is less likely to occur. An excessive increase in the flow rate can be effectively prevented.

  Furthermore, according to the packaging bag of this embodiment, since the hole length of each of the pores 8 is relatively long, even a packaged object having a high viscosity or a mixture of fluid and solid matter can be smoothly used. When the amount of outflow is reduced, easy peeling is achieved by weakening the pressing force to the packaging bag so that the number of pores 8 located in the peeling range of the easy peeling portion 6 is one or a small number. The part 6 may be peeled off, and when the amount of outflow is increased, the easy peeling part is made by increasing the pressing force to the packaging bag so that the number of pores 8 located in the peeling range of the easy peeling part 6 is large. 6 may be peeled off.

  And according to the packaging bag of this embodiment, the same further effect as in the previous embodiment can be obtained.

  3 (a) is a front view showing still another embodiment of the packaging bag of the present invention, FIG. 3 (b) is a sectional view taken along the line CC in FIG. 3 (a), and FIG. 3 (c). () Is explanatory drawing which shows the outflow state of the to-be-packaged item in the packaging bag.

  The packaging bag of this embodiment is different from the previous embodiment only in the arrangement of the pores 8, and the other points are configured in the same manner as in the previous embodiment. Differences will be described. The same parts as those in the embodiment will be described with the same reference numerals.

  That is, the packaging bag of this embodiment also constitutes a three-sided seal bag. As shown in FIGS. 3A and 3B, for example, a soft laminated film in which a base film layer 1a and a sealant layer 1b are laminated, for example. Is folded at the center in the width direction so that the sealant layers 1b face each other, and the laminated film 1 which is overlapped on both side edges and overlapped on both side edges of the two-layered laminated film 1 is elongated along the side edges. Of the vertical seal portion 2 formed by heat sealing over the entire width of the laminated film 1 at the position which becomes both end portions of the packaging bag of the two-layer laminated film 1 and the vertical seal portion 2 formed by heat sealing in the direction. Two transverse seal portions 3 that intersect with both ends in the longitudinal direction, and the folded portion that is the end portion on the opposite side to the longitudinal seal portion 2 of the two-layer laminated film 1 And Part 4, comprises a material to be packaged storage space 5 surrounded by the end portion 4 folded and lateral seal part 3 of 2 and two places their vertical seal portion between the laminate film 1 of the two-ply, a.

  Here, the vertical seal portion 2 has an easy peeling portion 6 extending in the longitudinal direction along the side edge on the side of the packaged article storage space 5 over the entire length thereof, and the side edge on the side of the packaged article storage space 5 The normal seal portion 9 extends in the longitudinal direction along the side edge on the opposite side, and the normal seal portion 9 has a seal strength of, for example, about 50 N / 15 mm like the horizontal seal portion 3. . On the other hand, the easily peelable portion 6 has a seal strength of 2 to 20 N / 15 mm, which is lower than the seal strength of the normal seal portion, whereby the easily peelable portion 6 accommodates an object to be packaged at a pushing speed of 800 mm / min. When the space 5 is pushed in, it peels off with a pushing force of 2 kgf or more and 20 kgf or less.

  And in the packaging bag of this embodiment, unlike the previous embodiment, it is relatively fine along the longitudinal direction of the vertical seal portion 2 in a plurality of rows in the center portion in the width direction of the easily peelable portion 6 (for example, the hole pitch). 3 to 5 mm (perforation of 3 to 5 mm), and each pore length is relatively short (for example, a pore length of 1.5 to 3 mm and a pore width of 0.2 to 0.5 mm). The pores 8 penetrate through the entire thickness of the two-layer laminated film 1 as shown in a cross section in FIG.

  Similarly to the previous embodiment, the packaging bag of this embodiment can be formed by, for example, an automatic filling bag making machine as described in Patent Document 1, and the easily peelable portion 6 and the pore 8 here are also It can be formed in the same manner as in the embodiment.

  When taking out the package from the packaging bag of this embodiment, the fluid pressure is generated in the package in the package storage space 5 by pressing the packaging bag with fingers or the like. When the easy peeling portion 6 is peeled from the packaged article storage space 5 side, as shown in FIG. 3 (c), the peeling occurs at the central portion in the longitudinal direction of the easy peelable part 6 side. The package P starts to flow out from the pores 8 on both sides of the packaging bag when it reaches the row closer to the package storage space 5 or the row closer to the outer side among the plurality of rows 8 of pores 8, Once the outflow begins, the fluid pressure of the package in the package storage space 5 decreases and the peeled portion becomes more difficult to spread, and the package continues to flow out only from the location where the first outflow started. .

  Therefore, according to the packaging bag of this embodiment, since the easy peeling part 6 is provided in the longitudinal seal part 2 so as to extend in the longitudinal direction, the easy peeling part 6 is peeled off by the fluid pressure of the package. Since it can be easily generated, and when the peeling reaches the pores 8, the package P flows out therefrom, and further spreading of the peeling is less likely to occur. An excessive increase in the flow rate can be effectively prevented.

  Furthermore, according to the packaging bag of this embodiment, the hole length of each of the pores 8 is relatively short, and the pores 8 are provided in a central portion in the longitudinal direction of the easily peelable portion 6. Therefore, it is possible to allow the low-viscosity package to flow out from only the central portion in the longitudinal direction of the easy-peeling portion 6 with an appropriate amount of outflow, and to reduce the outflow amount, the pores located in the peeling range of the easy-peeling portion 6 The easy peeling portion 6 may be peeled off by weakening the pressing force on the packaging bag so that the number of 8 is one or a small number, and when the outflow amount is increased, it is located in the peeling range of the easy peeling portion 6. What is necessary is just to peel the easy peeling part 6 by making the pressing force to a packaging bag strong so that the number of the pores 8 may become many.

  And according to the packaging bag of this embodiment, the same further effect as in the previous embodiment can be obtained.

FIG. 4 is a perspective view showing still another embodiment of the packaging bag of the present invention, and the packaging bag of this embodiment constitutes a stand pack that is preferably used for a refill bag or the like. That is, in the same manner as in the previous embodiment, this packaging bag is formed by, for example, folding a soft laminated film in which a base film layer and a sealant layer are laminated, for example, at the center in the width direction so that the sealant layers face each other. The two laminated films 1 (overlapping in the paper direction in the figure) and the both side edges (upper edges in the figure) of the two laminated films 1 are formed by heat sealing in the longitudinal direction along the side edges. The vertical seal portion 2 is formed by heat-sealing over the entire width of the laminated film 1 at positions corresponding to both ends of the packaging bag of the two-layer laminated film 1 and intersects with both longitudinal ends of the vertical seal portion 2 respectively. The two horizontal seal portions 3 and the end portions on the opposite side to the vertical seal portion 2 of the two-layer laminated film 1 are folded to form the bottom. And to end 4, which comprises the material to be packaged storage space 5 surrounded by the end portion 4 folded and lateral seal part 3 of 2 and two places their vertical seal portion between the laminate film 1 of the two-ply, a.
The packaging bag of FIG. 4 is composed of the vertical seal portion 2 on the upper side and the horizontal seal portion 3 on both sides, but is not limited to this. The portion can also be formed by the vertical seal portion 2.

  Moreover, the packaging bag of this embodiment has a bottle-shaped discharge passage 10 connected to the packaged article storage space 5 at one corner (the upper left corner in the figure) where the vertical seal portion 2 and the horizontal seal portion 3 intersect. In addition, the vertical seal portion 2 has a normal seal portion 9 extending over the entire length thereof, and along the side edge of the normal seal portion 9 on the packaged article storage space 5 side so as to close the distal end portion of the discharge passage 10. And has an easily peelable portion 6 extending so as to cross the intersecting portion of the vertical seal portion 2 and the horizontal seal portion 3. The normal seal portion 9 is, for example, about 50 N / 15 mm, like the horizontal seal portion 3. The seal strength is as follows. On the other hand, the easily peelable portion 6 has a seal strength of 2 to 20 N / 15 mm, which is lower than the seal strength of the vertical seal portion 2, so that the easily peelable portion 6 accommodates an object to be packaged at a pushing speed of 800 mm / min. When the space 5 is pushed in, it peels off with a pushing force of 2 kgf or more and 20 kgf or less.

  In the packaging bag of this embodiment, the longitudinal seal portion 2 extends in a direction intersecting the discharge passage 10 at a substantially central portion of the easily peelable portion 6 and is continuous and relatively long (for example, a hole length of 8 to 12 mm, A pore 8 (with a pore width of 0.2 to 0.5 mm) is formed, and the pore 8 penetrates the entire thickness of the two-layer laminated film 1 as in the previous embodiment.

  In the same manner as in the previous embodiment, the packaging bag of this embodiment, for example, by using the automatic filling bag making machine as described in Patent Document 1 above, for example, forming the central portion of the folded end portion 4 together with the formation of the vertical seal portion 2. It can be formed by folding inward to make the folded end portion 4 W-shaped in cross section, and the easily peelable portion 6 and the pore 8 here can also be formed in the same manner as in the previous embodiment. .

  In addition, as a modification of the packaging bag of this embodiment, instead of forming the bottom portion at the folded end 4 of the laminated film 1, the packaging bag is constituted by the three-layer laminated film 1, By laminating the side edges of the laminated film and both side edges of one laminated film sandwiched between them and vertically sealing each other, the laminated film sandwiched between them While forming a bottom part, you may surround the to-be-packaged article storage space 5 with the vertical seal | sticker part 2 and the horizontal seal | sticker part 3, and may form a stand pack.

  When the packaged article is taken out from the packaging bag of this embodiment, the packaging bag in the packaged article storage space 5 is caused to generate a fluid pressure by pressing the packaging bag with fingers or the like. When the easy-peeling part 6 that closes the film is peeled off from the packaged article storage space 5 side by the fluid pressure, the peeling starts from the packaged article storage space 5 side of the easy-peeled part 6 and the longitudinal center of the pore 8 The packaged article begins to flow out from the pores 8 on both sides of the packaging bag through the discharge passage 10 when reaching the part, and once the outflow starts, the fluid pressure of the packaged article in the packaged storage space 5 is increased. The peeled portion is less likely to spread further, and the packaged material continues to flow out only from the portion where the outflow starts first.

  Therefore, according to the packaging bag of this embodiment, since the longitudinal seal portion 2 is provided with the easy-peeling portion 6 having a short length that closes the discharge passage 10, Peeling is more likely to occur than the normal seal portion 9, but can be less likely to occur than the easy peel portion 6 in the previous embodiment, and this facilitates pressurization of the stand pack that is thicker than a normal three-side seal bag. By this, it is possible to effectively prevent the easy-peeling portion 6 from being peeled by unintentional pressurization other than during use.

  Furthermore, according to the packaging bag of this embodiment, since the pores 8 are relatively long and penetrate the entire thickness of the two-layered laminated film 1, refilling of a package having a relatively high viscosity is possible. At the same time, it is possible to flow out from the easy peeling portion 6 with an appropriate amount of outflow, and when reducing the outflow amount, the pressing force to the packaging bag is such that the peeling range of the easy peeling portion 6 applied to the pores 8 is narrowed. The easy peeling part 6 may be peeled with weakening, and when increasing the outflow amount, it is easy to increase the pressing force to the packaging bag so that the peeling range of the easy peeling part 6 applied to the pores 8 is widened. What is necessary is just to peel the peeling part 6. FIG.

  And according to the packaging bag of this embodiment, the same further effect as in the previous embodiment can be obtained.

  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, the packaging of this invention In addition to the three-side seal bag and stand pack described above, the bag is surrounded by a four-side seal bag, a lateral seal portion and two folded portions in the width direction, and a vertical seal portion is disposed between the folded portions. It is also possible to use a gusset (with gusset) bag or a gusset bag with folded portions on both sides. The packaging bag of the present invention may be formed by stacking a plurality of independent laminated films as described above, or may be formed by stacking hard laminated films.

  Further, in the packaging bag of the present invention, for example, the pores 8 may be formed linearly only at the central portion in the longitudinal direction of the easily peelable portion 6 and may be linear or perforated only near the end portion. The linear or perforated pores may extend not only in a straight line but also in a curved line.

  Furthermore, in the packaging bag of the present invention, the pores 8 may penetrate only one of the two laminated films 1 and are aligned in the stacking direction although they penetrate two. Instead, they may be displaced from each other. Such pores 8 may be formed, for example, along one side edge or both side edges of one laminated film before the vertical seal 2 is formed.

  Further, in the packaging bag of the present invention, the easily peelable portion 6 and the pores 8 may be provided in the horizontal seal portion 3, and the vertical seal portion 2 or the horizontal seal portion 3 provided with the easily peelable portion 6 is As shown in FIG. 5C for the case of the vertical seal portion 2, the normal seal portion extending over the entire length of the seal portion along the side edge opposite to the package storage space 5 side. 9 may not be included.

  Furthermore, in the packaging bag of this invention, it replaces with all or a part of the longitudinal direction of the normal seal part 9 provided along the vertical seal part 2, and is the intermediate | middle of the normal seal part 9 and the easily peelable part 6. It may have a weak seal part with sealing strength, and by doing so, it is easy to peel off by pressing the package storage space 5 of the packaging bag with fingers or the like when taking out the package Since the portion 6 and the weak seal portion are sequentially peeled and the packaged material can flow out not only from the pore 8 but also from the weak seal portion, it is easy to adjust the flow rate to increase the flow rate as necessary. Can do.

  Then, the weakly sealed portion is peeled off with a pushing force of 10 kgf or more and 40 kgf or less when the packaged article storage space 5 is pushed in at a pushing speed of 800 mm / min. The easy peeling portion 6 and the weak seal portion can be peeled sequentially and easily by pressing.

  Further, in the packaging bag of the present invention, the processing of the pores 8 is performed by sandwiching between a roller having a large number of protrusions corresponding to perforations and a roller having an elastic surface, instead of the laser processing described above. May be.

  Further, in the packaging bag of the present invention, the easily peelable portion 6 is formed by replacing the low pressing force by ultrasonic vibration or the like described above with heat sealing at a low temperature, and the adhesive strength is lowered at the position where the easily peelable portion is formed on the film surface. You may carry out by performing the surface treatment to apply | coat, application | coating of an applied material, etc., or arrange | positioning the tape and film raw material provided with easy peelability.

  Thus, according to the packaging bag of the present invention, pores are formed in any one of the vertical seal portion and the horizontal seal portion or an easily peelable portion provided at the intersection of the seal portions. Therefore, even if it is somewhat difficult to cause peeling of the easily peeled portion due to the fluid pressure of the packaged object, when the peeling reaches the pores, the packaged material flows out from the package, and further spreading of the peeling hardly occurs. Therefore, it is possible to easily adjust the flow rate when the packaged article is peeled after peeling, and it is possible to effectively prevent the flow rate from being excessively increased.

DESCRIPTION OF SYMBOLS 1 Laminated | multilayer film 1a Base film layer 1b Sealant layer 2 Vertical seal part 3 Horizontal seal part 4 Fold-up end part 5 Packaged article storage space 6 Easy peeling part 7 Opening opening 8 Fine hole 9 Normal seal part 10 Discharge passage P Packaged article

Claims (12)

It consists of a single laminated film folded in the width direction or a plurality of independent laminated films,
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 for storing an object to be packaged between the laminated films is surrounded by the vertical seal portion and the horizontal seal portion, or the vertical seal portion, the horizontal seal portion, and one folded portion in the width direction. Or surrounded by the horizontal seal portion and the two folded portions in the width direction and the vertical seal portion is disposed between the folded portions, and is defined as a packaging bag,
An easily peelable portion is provided at any one of the vertical seal portion and the horizontal seal portion or at the intersection of the seal portions,
A packaging bag, wherein pores are formed in the easily peelable portion.   The packaging bag according to claim 1, wherein the pores are formed at least in a central portion in a longitudinal direction of the easily peelable portion.   The seal part provided with the easily peelable part has a normal seal part extending over the entire length of the seal part along the side edge opposite to the packaged article storage space side. The packaging bag according to claim 1 or 2.   The pores extend intermittently in a perforated manner in the longitudinal direction of any one of the seal portions or in a direction obliquely crossing the intersecting portion of the seal portions. 4. The packaging bag according to any one of up to 3.   The said fine pore is extended over the full length in the longitudinal direction of the said any one seal | sticker part, or the direction which cross | intersects the cross | intersection part of those seal | stickers part diagonally. Any one of the packaging bags.   The packaging bag according to any one of claims 1 to 5, wherein the pores are arranged in a plurality of rows in a width direction of any one of the seal portions or an intersection of the seal portions.   The pores are slits extending intermittently or continuously along any one of the seal portions or the intersections of the seal portions, and pass through all of the stacked laminated films. The packaging bag according to any one of claims 1 to 6, wherein the packaging bag is provided.   The pore is a groove shape intermittently or continuously extending in the longitudinal direction of any one of the seal portions, and penetrates only one of the laminated films stacked or a plurality of the laminated films. The packaging bag according to any one of claims 1 to 6, wherein the packaging bags are penetrated without being aligned in the thickness direction.   The packaging bag according to any one of claims 1 to 8, wherein the pores are laser processed holes formed in the laminated film.   The said easy peeling part peels off with the pushing force of 2 kgf or more and 20 kgf or less when the said packaged article storage space is pushed in at a pushing speed of 800 mm / min. The packaging bag according to item.   4. The packaging bag according to claim 3, further comprising a weak seal portion having a sealing strength intermediate between the normal seal portion and the easily peelable portion, instead of all or a part of the normal seal portion in the longitudinal direction. .   12. The packaging bag according to claim 11, wherein the weakly sealed portion is peeled off with an indentation force of 10 kgf or more and 40 kgf or less when the accommodation object storage space is indented at an indentation speed of 800 mm / min.

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