JP4639677B2 - Self-supporting flexible packaging bag and air sealing method in the flexible packaging bag - Google Patents

Description

  The present invention relates to a self-supporting flexible packaging bag and a method for enclosing air in an independent air chamber formed in a seal portion of the flexible packaging bag.

  In soft packaging materials mainly composed of packaging bags that wrap liquids, solid-liquid mixtures, powders, granules, etc. produced using conventional soft packaging materials, they are excellent in compressibility and flexibility, but as containers It has poor shape retention and thus has various harmful effects.

  On the other hand, plastic molded containers such as plastic bottles and rigid containers such as glass bottles have excellent handling properties when used, but their compressibility and flexibility when not in use are impaired, and In the process of forming and filling the contents, there are difficulties such as requiring large-scale equipment.

  For example, in the field of liquid containers, as a replacement for bottles and PET bottles, paper packs are used in which a paper and plastic film are bonded together to form a box-shaped container. In this case, the outer shape of the container is maintained. Expensive paper must be used as a means, and the cost is high and the burden on the environment is large.

  In recent years, standing pouches have been adopted in a wide range of fields as flexible packaging containers that are self-supporting, and they are used for a variety of purposes, from refills for single-use uses to those with resealability. It has problems such as crunching when there is a shortage, holding both hands when changing the contents, attaching another part to the spout, using relatively thick packaging material, bag making shape Various attempts have been made, such as devising.

  To make a soft packaging bag made of soft packaging material self-supporting, for example, after filling the soft packaging bag with a snack confectionery etc., the head space is purged with an inert gas to give it a slight bulge. In this method, it is difficult to apply an atmospheric pressure higher than the atmospheric pressure to the space filled with the gas.

  In addition, there is an example of a cushioning material for packaging in which a pressure higher than atmospheric pressure is accommodated in a soft packaging material (for example, see Patent Document 1).

The said prior art document is shown.
However, in the present invention, after the gas is sealed in the bag once at atmospheric pressure or lower, partial sealing is performed to further reduce the volume in the bag, and the gas at atmospheric pressure or higher is sealed in the gap. It is a cushioning material in which only gas is packaged as a bag storage.

  The present invention has been made in view of the above-described problems relating to the technology for giving a soft packaging bag self-supporting properties, and is provided with a gap portion that can be a support structure in addition to the content storage portion in the soft packaging bag. It is an object of the present invention to provide a flexible packaging bag that is self-supporting by enclosing air having a pressure equal to or higher than atmospheric pressure in the gap and a method for enclosing air in the flexible packaging bag.

According to the first aspect of the present invention, at least the outer periphery of the composite film having the sealant layer on the innermost surface is formed with the seal portion formed on the inner side while leaving the opening side on one side, and the content storage portion is formed on the inner side. and a flexible packaging bag, on at least one of the seal portion of the seal portion formed on both sides of the flexible packaging bag, the central portion of the unsealed state continuously from the upper vicinity of the flexible packaging bag to the bottom near are independent air chamber columnar a gap portion is gas or liquid is sealed is formed, the independent air chambers the content storage portion is formed in the content storage portion side and communicating with filling port is hermetically sealed And a self-supporting flexible packaging bag characterized in that the content is stored in the content storage portion from the opening side and is supported by the columnar independent air chamber .

  As described above, according to the first aspect of the present invention, at least one seal portion of the seal portion formed on both sides of the flexible packaging bag has a central portion that is not continuously continuous from the vicinity of the upper portion to the vicinity of the lower portion of the flexible packaging bag. An independent air chamber in a sealed state is formed, and the independent air chamber and the content storage portion communicate with each other via an air sealing port formed on the content storage portion side of the independent air chamber. After the air is fed into the independent air chamber, the air sealing port is closed and the air is sealed in the independent air chamber, so that even if the independent air chamber becomes a column and the content is reduced The flexible packaging bag is self-supporting without crushing.

Further, the invention of claim 2, in the invention of claim 1, connected a plurality of independent air chambers through the filling port, said plurality of independent air chambers have been filled through the filling port a flexible packaging bag having a self-supporting, characterized in Tei Rukoto filled with air.

  Thus, according to the second aspect of the present invention, the independent air chambers are connected to each other, and a plurality of independent air chambers are filled with air at the same time by sealing air from one opening side. It is possible to fill each individual air chamber with air by simple operation.

Further, the invention of claim 3 is a soft part in which a seal part is formed with the opening edge of one side left at the periphery of at least two composite films having a sealant layer on the innermost surface, and a content storage part is formed inside. a packaging bag, the soft center portion continuously from the upper neighborhood to the lower neighborhood of the flexible packaging bag in at least one of the seal portion of the seal portion formed on both sides of the packaging bag is a gap portion of the unsealed state independent air chamber is formed, a air method encapsulation in soft packaging bag air filling port is formed that communicates with the content storage portion the contents of housing portion side of the independent air chamber, the flexible packaging the opening edge of the opening process of the flexible packaging bag which is open in the longitudinal direction of the bag, the air nozzle insertion step of inserting the air nozzle in the opened flexible packaging bag opening side, the opening side air nozzle is inserted from the front and rear directions of the two Airoz with one pad An opening side closing process for temporarily closing the opening side by sandwiching it, an air feeding process for sending air to the independent air chamber from the air nozzle insertion port on the opening side temporarily closed through the content storage unit, the contents air filling port sealing process for sealing the air filling port of the independent air chamber in a state where the atmospheric pressure applied to the housing part, by sealing the air to the independent air chamber by passing through the by forming the columnar, the columnar characterized Rukoto to self the flexible packaging bag supported by an independent air chamber, an air method encapsulation in soft packaging bag.

Thus, according to the third aspect of the present invention, the opening step of the flexible packaging bag for opening the opening side of the flexible packaging bag in the front-rear direction, the air sealing for inserting the air sealing nozzle into the opening side of the opened flexible packaging bag Nozzle insertion process, opening side closing step of temporarily closing the opening side by sandwiching the opening side where the air sealing nozzle is inserted from the front and back with the two first pads together with the air sealing nozzle, temporarily closed An air feeding process for sending air into the independent air chamber through the content storage section from the air-sealed nozzle insertion port on the opening side, and sealing the air sealing port of the independent air chamber in a state where atmospheric pressure is applied to the content storage section Since the air is sealed in the independent air chamber formed in the sealing portion of the flexible packaging bag through the air sealing port sealing step and each of the above steps, the air is supplied to the independent air chamber which is a gap portion provided in the central portion of the sealing portion. After sealing, only the independent air chamber When sealing the seal to support the reinforcing structure can be.

According to a fourth aspect of the present invention, there is provided a soft part in which a seal part is formed leaving an opening side of one side of the composite film of at least two front and back surfaces having a sealant layer on the innermost surface, and a content storage part is formed on the inner side. a packaging bag, the soft center portion continuously from the upper neighborhood to the lower neighborhood of the flexible packaging bag in at least one of the seal portion of the seal portion formed on both sides of the packaging bag is a gap portion of the unsealed state independent air chamber is formed, a air method encapsulation in soft packaging bag air filling port is formed that communicates with the content storage portion the contents of housing portion side of the independent air chamber, the flexible packaging spout inserting step of inserting the spout the opening edge of the bag opening step of the soft packaging bag which is open in the longitudinal direction, with opened soft packaging bag opening side, an air path which is continuous from the spout to the inner surface to the air filling port Two second panels with grooves for them Air feed step of feeding the air to de independent air chamber from the spout with clamped around the flexible packaging bag, the air filling port sealing process for sealing the air filling port of the independent air chambers, the independent air chamber by passing through the in by forming the columnar enclosed air, the supporting columnar independent air chambers, characterized in Rukoto to self the flexible packaging bag, an air method encapsulation in soft packaging bag.

Thus, according to invention of Claim 4 , the opening process of the flexible packaging bag which opens the opening side of a flexible packaging bag to the front-back direction, a spout is inserted in the opening side of the opening side of the opened flexible packaging bag In the spout insertion process, two second pads with a continuous air path groove from the spout to the air inlet on the inner surface are sandwiched between the front and back of the flexible packaging bag, and air is passed from the spout to the independent air chamber. Since air is sealed in the independent air chamber formed in the sealing portion of the flexible packaging bag by passing through the air feeding step, the air sealing port sealing step for sealing the air sealing port of the independent air chamber, and the above steps, Even for a packaging bag having a thin air inlet such as a spout, air can be fed into the independent air chamber, and only the independent air chamber can be hermetically sealed to form a support and reinforcement structure.

  Thus, the self-supporting flexible packaging bag of the present invention is a packaging bag having a void portion that can be a support structure in addition to the contents storage portion in the bag structure, and a gas having a pressure higher than atmospheric pressure in the void portion. Packing with excellent self-sufficiency and display properties because it can store liquids, solids, powders, granules, etc., and has a fixed shape regardless of the increase or decrease of the contents. The bag improves handling when opened.

The present invention will be described in detail below based on one embodiment.
As shown in FIGS. 1 and 2, for example, the flexible packaging bag (10) having the self-supporting property of the present invention is composed of a composite film (1, 1) having two front and back surfaces having a sealant layer (2) on at least the innermost surface. The seal part (12) is formed leaving the opening edge (11) of one side at the periphery, and the content storage part (13) is formed inside.

And at least one seal part of the seal part formed on both sides of the flexible packaging bag is formed with an independent air chamber (14) in which the central part is continuously unsealed from the vicinity of the upper part to the vicinity of the lower part of the flexible packaging bag. Has been.

  The independent air chamber (14) and the content storage part (13) communicate with each other via an air sealing port (15) formed on the content storage part side of the independent air chamber. After air is fed into the independent air chamber (14) through the content storage part (13), the air sealing port (15) is hermetically sealed (16) by a known sealing method such as heat sealing, impulse sealing, or ultrasonic sealing. (See FIG. 1).

  Thus, since the independent air chamber (14) in which air is sealed is formed in at least one seal portion of the seal portion (12) formed on both sides of the flexible packaging bag, the contents from the opening side (11) For example, after the liquid or powdered contents are stored in the storage part (13), the flexible packaging bag (10) filled with the contents by hermetically sealing the opening side is placed in the columnar independent air chamber (14). It is supported and independent.

  As shown in FIGS. 1 and 2, by forming the independent air chamber (14) in both the left and right seal portions (12), the self-supporting property is further increased and the stability is also improved.

  The flexible packaging bag (10) can correspond to an arbitrary shape such as a three-side sealed bag, a four-side sealed bag, a gusset pillow bag, a standing pouch, a plugged pouch.

  Moreover, the substance enclosed in the independent air chamber (14) is not limited to air, and may be a gas such as nitrogen gas or a liquid such as water.

  The independent air chambers (14) are connected to each other via the content storage portion (13), and a plurality of independent air chambers (14) are simultaneously formed by enclosing air from one opening side (11). It has a structure filled with air. That is, there is only one air inlet, and the air can be sealed in a plurality of independent air chambers at the same time.

The air inlet port is not independent of the opening side for filling the contents, and is characterized in that air can be sealed from the outlet side and the opening side for filling the contents. It is not necessary to have a shape that conforms to the tip size of the air sealing nozzle, and even if the opening side is wide according to the content filling process, air sealing can be performed with a nozzle that is much thinner than that.
Next, a method for enclosing air in the independent air chamber of the flexible packaging bag will be described.

  First, in the seal part (12) on both sides of the three-sided seal bag in which the content storage part (13) is formed, an independent air whose central part is an unsealed gap part continuously from the vicinity of the upper part to the vicinity of the lower part. A chamber (14) is formed, and the independent air chamber (14) and the content storage portion (13) communicate with each other via an air sealing port (15) formed on the content storage portion side of the independent air chamber. ing. A three-sided seal bag having the above structure was prepared (see FIG. 2).

  The open side (11) of the flexible packaging bag shown in FIG. 2 is connected to the left and right independent air chambers (14) via the air sealing port (15), and therefore gas such as air is supplied from the open side (11). When fed into the packaging bag, the independent air chamber (14) as well as the content storage portion (13) are filled with a gas such as air through the air sealing port.

  As an air sealing method, first, the opening side (11) of the soft packaging bag (10) is moved in the front-rear direction by a sucker or other means to open (soft packaging bag opening step to (A)).

  An air-sealed nozzle (5) that is much thinner than the open side from the open side (11) of the opened soft-packaging bag (10) is inserted into the soft-packaging bag (air-filled nozzle insertion step to (B)). (See FIG. 3).

In this state, even if a gas having an atmospheric pressure higher than the atmospheric pressure is sent from the air-filled nozzle into the flexible packaging bag, the gas escapes from the opening side of the bag around the air-filled nozzle. As shown in b), the opening side (11) into which the air-filled nozzle is inserted is sandwiched with the air-filled nozzle (5) by a pair of first pads (6) from the front and rear direction, temporarily inside and outside the bag. Shut off. (Opening edge closing step to (C)). By doing so, it becomes possible to send atmospheric pressure higher than atmospheric pressure into the packaging bag.

  In this state, air is sent into the independent air chamber (14) from the air-sealed nozzle (5) at the opening side temporarily closed through the content storage portion (13) (air feeding step to (D)). ).

In a state where atmospheric pressure is applied in the flexible packaging bag, the air sealing port (15) is hermetically sealed (16) and the independent air chamber (14) is sealed as shown in FIG. (E)).
In this case, the sealing method may be any sealing method such as a heat sealing method, an impulse sealing method, and an ultrasonic sealing method, and an optimal method can be selected depending on the ability and cost required for the process.
The location and shape of the air sealing port (15) can be selected from various patterns depending on the design of the flexible packaging bag, the function of the independent air chamber, the convenience of the system, and the like.

  As shown in FIG. 6, when the spout (17) is attached to the top or the like that is the opening side, the first seal pad is not necessary, and air sealing according to the size of the spout (17) A nozzle may be selected. However, in this case, even if the air pressure from the air sealing nozzle is released after closing the air sealing port, the gas contained in the bag contents storage part is difficult to escape to the outside, and the entire bag is held in an inflated state. There is a risk of hindering the content filling process.

  In such a case, as shown in FIG. 7 and FIG. 8, the second pad (7) having a groove (8) cut in accordance with the air inflow path from the spout to the air sealing port is formed on the plane of the plate member. One set is prepared, and after sandwiching the front and back of the packaging bag, the gas may be injected from the spout with an air-filled nozzle. A gas such as air injected from the air sealing nozzle reaches the air sealing port (15) while forming a tunnel in the flexible packaging bag along the groove (8) cut in the second pad (7). 14) is press-fitted only.

  This method uses the first pad (6) and the second pad (7) together even in the case of a bag having a large opening side as shown in FIG. 1, thereby preventing unnecessary swelling of the packaging bag in the air sealing process. It is possible to prevent this and to stabilize the behavior of the workpiece in the process.

  In FIG. 7, the shape of the second pad is an appearance that covers a partial range of the contents storage portion (13) of the bag. However, if the shape covers the entire contents storage portion, Even if gas such as air until reaching 15) protrudes from the groove (8), the trunk portion of the packaging bag can be more stably retained.

It is front explanatory drawing which shows one Example of the flexible packaging bag which has the self-supporting property of this invention. It is front explanatory drawing which shows the state before enclosing air in the flexible packaging bag which has the self-supporting property of FIG. It is front explanatory drawing which shows typically the state which inserted the air enclosure nozzle in the opening side of the flexible packaging bag of FIG. The state which pinched | interposed the 1st pad on the opening side is shown typically, (a) is front explanatory drawing, (b) is the A-A 'sectional explanatory drawing of (a). It is front explanatory drawing which shows typically the state which enclosed air in the flexible packaging bag of FIG. 2, and sealed the air sealing port of the independent air chamber. It is front explanatory drawing which shows one Example of the flexible packaging bag (state before enclosing air) which has the self-supporting property of this invention with which the spout stopper was attached. It is a perspective explanatory view showing an example of the second pad. It is front explanatory drawing which shows typically the state which pinched | interposed the 2nd pad between the soft packaging bags of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Composite film 2 ... Sealant layer 3 ... Base material 5 ... Air filled nozzle 6 ... 1st pad 7 ... 2nd pad 8 ... Groove 10 ... Flexible packaging bag 11 ... Open side 12 ... ··· Seal 13 ··· Contents storage 14 · · · Independent air chamber 15 · · · Air inlet
16 ... Sealing seal 17 ... Outlet

Claims (4)

A soft packaging bag in which a peripheral portion of at least two front and back composite films having a sealant layer on the innermost surface is formed with a seal portion formed on one side leaving an open side, and a content storage portion formed on the inside. at least one of the sealing portion of the sealing portion formed at both sides of the packaging bag, said central portion continuously from the vicinity of the upper portion of the flexible packaging bag to the bottom near the a and gas or liquid in the gap portion of the unsealed state sealed formed columnar independent air chambers that are, the independent air chambers the contents are formed on the content storage portion side of the accommodating portion and communicating with filling port are hermetically sealed, the contents receiving from said opening edge A self-supporting flexible packaging bag characterized in that the contents are stored in the part and are supported by the columnar independent air chamber . Via said filling port is connected a plurality of independent air chambers, said plurality of independent air chamber and said Tei Rukoto filled with encapsulated air through the filling port according to claim 1, wherein Flexible packaging bag with independence. A soft packaging bag in which a seal part is formed with an opening side of one side left of the periphery of at least two composite films having a sealant layer on the innermost surface, and a content storage part is formed on the inner side. independent air chamber central portion is void portion of the unsealed state from the upper vicinity of the flexible packaging bag in at least one of the seal portion of the seal portion formed on both sides continuously to the bottom near the bag been formed, the independent A method for enclosing air into a flexible packaging bag in which an air sealing port communicating with the content storage unit is formed on the content storage unit side of the air chamber ,
Opening process of the flexible packaging bag to open the opening side of the flexible packaging bag in a longitudinal direction,
An air nozzle insertion step of inserting an air nozzle into the opening side of the opened flexible packaging bag,
An opening side closing step of temporarily closing the opening side by sandwiching the opening side where the air nozzle is inserted from the front and rear direction with the two first pads together with the air nozzle;
An air feeding step of feeding air into the independent air chamber from the air nozzle insertion port on the opening side which is temporarily closed through the content storage unit;
An air sealing port sealing step for sealing the air sealing port of the independent air chamber in a state where atmospheric pressure is applied to the content storage unit;
By forming the columnar enclosed air to the independent air chamber Through the features a Rukoto to self the flexible packaging bag supported by the columnar independent air chambers, the air to flexible packaging bags Encapsulation method. A soft packaging bag in which a seal part is formed with an opening side of one side left of the periphery of at least two composite films having a sealant layer on the innermost surface, and a content storage part is formed on the inner side. independent air chamber central portion is void portion of the unsealed state from the upper vicinity of the flexible packaging bag in at least one of the seal portion of the seal portion formed on both sides continuously to the bottom near the bag been formed, the independent A method for enclosing air into a flexible packaging bag in which an air sealing port communicating with the content storage unit is formed on the content storage unit side of the air chamber ,
Opening process of the flexible packaging bag to open the opening side of the flexible packaging bag in a longitudinal direction,
A spout insertion step for inserting a spout into the opening side of the opened soft packaging bag,
An air feeding process in which two second pads each having a groove for an air path continuous from the spout to the air inlet are sandwiched between the front and back of the flexible packaging bag and air is fed from the spout into the independent air chamber ,
Air sealing port sealing step of sealing the air filling port of independent air chambers,
By forming the columnar enclosed air to the independent air chamber Through the features a Rukoto to self the flexible packaging bag supported by the columnar independent air chambers, the air to flexible packaging bags Encapsulation method.

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