WO2010110372A1

WO2010110372A1 - Packaging bag

Info

Publication number: WO2010110372A1
Application number: PCT/JP2010/055235
Authority: WO
Inventors: 義久天野
Original assignee: 有限会社アマノ
Priority date: 2009-03-27
Filing date: 2010-03-25
Publication date: 2010-09-30

Abstract

A packaging bag which can be easily opened, which allows the contents to be taken out smoothly, which is kept tightly sealed when an article is on the market, which can be easily re-sealed, and which stably maintains the re-sealed state. A flap section (13) is folded forward with a range thereof adhered in a band-like shape to a rear surface sheet section (11) by double-side adhesion, said range having a predetermined height from the upper end of the flap section. The position of the upper end (15) of a front surface sheet section is configured to be lower than an adhesion band (14) at the upper end of the flap section, and the flap section (13) is adhered in a "squared O" shape and a "horizontal I" shape to both the rear surface sheet section (11) and the front surface sheet section (12) by single-side adhesion by means of a horizontal squared U-shaped adhesion band (16) in the middle of the flap section and of an adhesion band (17) at the lower end of the flap section. Three lines of pressure sensitive adhesive layers (19) are arranged on the surface of the front surface sheet section (12) in such a manner that the pressure sensitive adhesive layers are sandwiched in the vertical direction by the horizontal squared U-shaped adhesion band (16) in the middle of the flap section and by the adhesion band (17) at the lower end of the flap section.

Description

Packaging bag

The present invention relates to a packaging bag having both easy-openability and easy-resealability.

Various proposals have been made on packaging bags that can be easily opened and have resealability (for example, Patent Documents 1 to 7).
Japanese Utility Model Publication No. 5-58651 Japanese Utility Model Publication No. 6-71453 Japanese Utility Model Publication No. 7-40475 JP 2000-272633 A JP 2000-85798 A JP 2006-199343 A JP 2007-45439 A

In Patent Document 1, when a cut line 21 is formed at the upper end edge of the front surface baggage 2 and the folded piece 31 coated with the adhesive 31a is pulled and opened, the portion of the cut line 21 is the folded piece 31. A packaging bag is proposed in which the opening 22 is formed in a state where it is stuck to the adhesive so that the contents near the opening at the time of resealing are not stuck to the adhesive 31a (FIG. 11). (See (A)). The packaging bag of Patent Document 1 has a problem that, since the pressure-sensitive adhesive layer is formed on the entire surface of the lid body 1, it is difficult to open and the finger is easy to touch the pressure-sensitive adhesive when resealed.

In Patent Document 2, three sides of the

films

10 and 11 having the heat seal layers 10b and 11b provided on the inner surface are sealed by heat seal, and the belt-like cold sealant layer is opposed to the inner side from the end of the remaining opening 14. A packaging bag is proposed in which a scheduled opening line 17 is provided between the reclosed portion 15 and the heat seal portion 16 at the edge (see FIG. 11B). Since the packaging bag of Patent Document 2 includes the reclosing portion 15 on the inner side surface of the bag, there is a problem that the content adheres to the adhesive layer at the time of taking out, making it difficult to take out or making it difficult to reseal.

Patent Document 3 proposes a packaging bag in which a double-sided tape T is provided below the cut line 3, folded so as to wind the mouth, and resealed with the double-sided tape T (see FIG. 11C). . The packaging bag of Patent Document 3 has a problem that re-sealing becomes insufficient because the portion that has been resealed and entrained tries to be restored.

Patent Document 4 proposes a packaging bag that can be resealed using a male engaging portion 18 and a female engaging portion 20 (see FIG. 11D). The packaging bag of Patent Document 4 requires a fastener part, and has a problem that the manufacturing process is complicated and the cost is high.

In Patent Document 5, the back surface of the flap 4 is formed on the first adhesive layer 7 near the tip and the second adhesive layer 8 near the opening, and the first adhesive layer 7 is bonded once and then opened. Then, a packaging bag having a thermocompression bonding adhesive that does not adhere again is proposed (see FIG. 11E). The packaging bag of Patent Document 5 must employ a process of providing the first and second adhesive layers on the bag after the contents are stored, and packaging and bag making must be performed simultaneously in one line. However, there is a problem of lack of versatility.

Patent Document 6 discloses that a glass mouth-shaped unsealed portion 36 is peeled off by a pulling force P in an oblique direction and opened, and is folded and crimped through a fold 41 so that the adhesive resin layer 23 is on the inside. A packaging bag that is used after being resealed is proposed (see FIG. 11F). Similar to the packaging bag of Patent Document 3, the packaging bag of Patent Document 6 has a problem in that resealing becomes insufficient due to a force acting to restore the folded and refolded portion itself.

Patent Document 7 proposes a packaging bag in which an unsealed portion 11 is formed at the center of a re-adhesive seal portion 12 formed in an opening, and the unsealed portion 11 is pinched by hand to easily open back and forth (FIG. 11). (See (G)). Similar to the packaging bag of Patent Document 2, the packaging bag of Patent Document 7 has a problem that the content adheres to the adhesive layer at the time of taking out, making it difficult to take out or resealing.

In addition, the packaging bags of

Patent Documents

2, 3, 4, and 6 have high sealing performance at the time of selling goods, but there is also a problem that a part of the bag needs to be cut when opened, and the cut portion becomes garbage.

An object of the present invention is to provide a packaging bag that is easy to open, allows the contents to be taken out smoothly, has high sealing performance when selling goods, can be easily resealed, and is stable in a resealed state. is there.

The packaging bag of the present invention made to achieve the above object comprises a rear sheet part in which both sides are heat-sealed to each other and a flap part having resealability on the upper part of the front sheet part, and has the following configuration. It is characterized by providing.
(1) The flap portion has a structure in which a range of a predetermined height from the upper end is folded forward in a state where the flap portion is bonded or fused in a band shape to the rear sheet portion.
(2) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a band shape.
(3) The flap part has a flap middle adhesive band that cuts off the upper end of the front sheet part from the outside so that the upper end reaches a part bonded or fused in the band shape, and the vicinity of the lower end of the flap in the width direction. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a transverse flap lower end adhesive band.
(4A) A finger-hanging portion that is not bonded is left in a predetermined height range from the lower end of the flap portion.
(5) A pressure-sensitive adhesive layer is formed on the surface of the front sheet portion in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.

According to the packaging bag of the present invention, it is possible to re-seal by closing the flap part so that the pressure-sensitive adhesive layer is pressed with a finger after the finger-hanging part is picked with a finger and the flap part is pulled. . In this resealed state, since the upper end of the flap portion is folded back and adhered or fused to the rear sheet portion, no force is generated to jump up. Therefore, the resealed state can be stably maintained. Further, in the state before opening, the flap portion is bonded in a state of surrounding the opening at the upper end of the front sheet portion by the middle adhesive band and the bonded or fused portion at the upper end, so that the sealing performance is high. Can be packaged. In addition, by providing an adhesive band at the lower end of the flap, in the state before opening, the pressure-sensitive adhesive layer is sandwiched between the upper and lower adhesive bands at the middle of the flap and the lower end, and foreign matter is prevented from entering, This is because it is possible to solve the problem that some foreign matter adheres to the pressure-sensitive adhesive layer and reduces the adhesiveness at the time of resealing.

Similarly, the packaging bag of the second invention made to achieve the above object comprises a rear sheet part in which both sides are heat-sealed to each other and a flap part having resealability on the upper part of the front sheet part, and the following: A configuration is provided.
(1) The flap portion has a structure in which a range of a predetermined height from the upper end is folded forward in a state where the flap portion is bonded or fused in a band shape to the rear sheet portion.
(2) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a band shape.
(3) The flap part has a flap middle adhesive band that cuts off the upper end of the front sheet part from the outside so that the upper end reaches a part bonded or fused in the band shape, and the vicinity of the lower end of the flap in the width direction. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a transverse flap lower end adhesive band.
(4B) The flap portion is formed with a cut line formed by a perforation located on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(5) A pressure-sensitive adhesive layer is formed on the surface of the front sheet portion in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.

The packaging bag of the present invention according to the second aspect of the present invention is formed by cutting the lower end of the flap portion with a perforation to form a finger hook portion, and then pulling it, and then re-sealing it in the same manner as the packaging bag described above. It can be carried out. By cutting at the perforation, it is possible to determine at a glance whether or not it is unopened. In addition, even in the packaging bag of the first explained, it is possible to determine at a glance whether or not unopened by using a transparent material and using a material that turns white when peeled off as a heat-sensitive adhesive. It is possible to do. In addition, as a method of cutting the tip of the perforation, it may be cut by pulling a portion ahead of the perforation from either the left or right side, or a vertical slit in the center of the portion beyond the perforation. It may be configured to be cut off from the center to the left and right.

Any of the packaging bags of the present invention described above can further have the following configuration.
(6) The flap mid-adhesive band reaches on both sides to a portion bonded or fused to the upper end of the flap portion in a state before the flap is folded back, and below the upper end of the front sheet portion. It is formed in a shape that forms a U-shaped opening that crosses the width direction.

By constructing the adhesive band in the middle of the flap as described above, the adhesive does not wrap around the upper end of the front sheet portion that becomes the opening when opening, and it can be reliably opened only by pulling the flap. Because it can.

Each of these packaging bags can further have the following configuration.
(7) The lower ends of the front sheet portion and the rear sheet portion are open, and can be fused by heat sealing after the contents are stored.

By adopting such a configuration, the bag can be completed with the flap portion closed, and the contents can be stored from the open portion at the lower end, so the contents can be stored in an automatic filling device or the like. is there.

Any of the packaging bags of the present invention described above can further have the following configuration.
(8) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.

(8) Due to the presence of the “pressure-sensitive adhesive layers on both the left and right sides formed so as to straddle the content outlet”, the sealing performance at the time of resealing after opening can be further enhanced.

The packaging bag of the third invention, which was also made to achieve the above object, comprises a rear sheet part in which both sides are heat-sealed to each other and a flap part having resealability on the upper part of the front sheet part, and the following A configuration is provided.
(11) The flap portion has a structure in which a range of a predetermined height from the upper end of the flap portion is folded forward in a state where the flap portion is bonded or fused to the rear sheet portion in a number of points.
(12) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a number of dot shapes.
(13) The flap portion includes a flap middle adhesive band that cuts off the upper end of the front sheet portion from the outside so that the upper end reaches a portion bonded or fused in a number of points, and the vicinity of the lower end of the flap. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a flap lower end adhesive band that crosses in the width direction.
(14) The flap portion has a perforation line formed on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(15) On the surface of the front sheet portion, a pressure-sensitive adhesive layer is formed in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
(16) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.
(17) A slit that reaches the downward apex of the triangular tongue piece from the lower end of the center is formed so that the portion beyond the perforation can be cut out leaving a downward triangular tongue piece at the center.

The packaging bag of the present invention according to the third aspect of the present invention can be easily cut out so that the portion beyond the perforation on the lower end side of the flap portion is opened from the center to the left and right at the slit portion. And after cutting off, since a downward triangular tongue piece remains, it can be opened by picking the tongue piece and pulling the flap portion upward. The presence of this tongue makes it easier to open. Up to here, it is the same as the packaging bag of the second invention. That is, as described above, the packaging bag according to the second aspect of the present invention may be configured such that a vertical slit is formed in the center of the portion beyond the perforation and the left and right sides are cut from the center. On the other hand, in the packaging bag of the third invention, since the folded portion of the flap portion is bonded or fused in a number of points, this portion can also be peeled off, that is, the triangular tongue piece is directed upward. When pulled slightly stronger, the flap part and the rear sheet part can be easily peeled off because the part where the flap part and the rear sheet part are bonded or fused is a large number of dots. A flap part can be extended and taking in and out of the contents becomes easy.

Similarly, the packaging bag of the fourth invention, which has been made to achieve the above object, comprises a rear sheet part in which both sides are heat-sealed to each other and a flap part having resealability on the upper part of the front sheet part, A configuration is provided.
(11A) The flap portion has a structure in which a range of a predetermined height from the upper end thereof is folded forward with a range of points adhered or fused to the rear sheet portion, and the folded portion A perforation is formed in the top in the width direction so that it can be cut off.
(12) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a number of dot shapes.
(13) The flap portion includes a flap middle adhesive band that cuts off the upper end of the front sheet portion from the outside so that the upper end reaches a portion bonded or fused in a number of points, and the vicinity of the lower end of the flap. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a flap lower end adhesive band that crosses in the width direction.
(14) The flap portion has a perforation line formed on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(15) On the surface of the front sheet portion, a pressure-sensitive adhesive layer is formed in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
(16) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.
(17) A slit that reaches the downward apex of the triangular tongue piece from the lower end of the center is formed so that the portion beyond the perforation can be cut out leaving a downward triangular tongue piece at the center.

According to the packaging bag of the fourth invention, the flap portion can be cut off at the top perforation when the flap portion is stretched when opened. At the time of resealing after cutting off the flap part, the rear sheet part is bent slightly above the upper end of the front sheet part and slightly paved with nails, and the upper end part of the rear sheet part is placed on the pressure sensitive adhesive layer. It is possible to re-seal by pressing repeatedly. As in the third invention, the fourth invention is easy to put in and out the contents when opened.

According to the packaging bag of the present invention, it is easy to open, the contents can be taken out smoothly, the sealing property at the time of selling the goods is high, it can be easily resealed, and the resealed state is stably maintained. be able to.

1 is a front view including a partially enlarged sectional view of Example 1. FIG. 1 is a front view of a state in the middle of manufacture including a partially enlarged sectional view of Example 1. FIG. FIG. 6 is an explanatory diagram showing a manufacturing process of Example 1. It is explanatory drawing which shows the content filling method of Example 1. FIG. It is explanatory drawing which shows the opening method and resealing method of Example 1. 6 is a front view of a main part of Example 2. FIG. 6 is a front view of Example 3. FIG. 10 is a front view of the main part of Example 4. FIG. 10 is a front view of a main part of Example 5. FIG. 10 is a front view of a main part of Example 6. FIG. It is explanatory drawing of a prior art example.

Hereinafter, modes for carrying out the present invention will be described based on some examples.

The packaging bag 10 of Example 1 is shown in FIGS. The packaging bag 10 of Example 1 is provided with a flap portion 13 having resealability on the upper portion of the rear sheet portion 11 and the front sheet portion 12 whose both sides are heat-sealed by heat sealing.

Here, the flap portion 13 has a structure in which a range of a predetermined height from the upper end thereof is folded forward in a state of being bonded to the rear sheet portion 11 in a band shape. Hereinafter, this band-shaped bonding portion is referred to as a flap upper end bonding band 14.

The upper end 15 of the front sheet portion is configured to be lower than the flap upper end adhesive band 14. Then, as shown in FIG. 1, the flap portion 13 crosses the position immediately below the upper end 15 of the front sheet portion and reaches the flap upper end adhesive band 14 on both sides so as to reach the flap upper end adhesive band 14 as shown in FIG. A U-shaped adhesive band 16 bent vertically upward (hereinafter referred to as a “C-shaped adhesive band in the middle of the flap”) 16 and a flap lower end band that crosses a position at a predetermined height from the lower end of the flap in the width direction. The adhesive strip 17 is bonded to the front sheet portion 12 and the rear sheet portion 11 with a heat sensitive adhesive. In the state before the flap 13 is folded, the U-shaped adhesive band 16 in the middle of the flap is positioned above the flap upper end adhesive band 14 on the inner surface side of the rear sheet portion 11 as shown in FIG. Will be formed.

In the range of a predetermined height from the lower end of the folded-back flap part 13, as shown in FIG. And, on the surface of the front sheet portion 12, as shown in FIG. 1, it is located at a predetermined height below the upper end 15 and between the flap middle U-shaped adhesive strip 16 and the flap lower end strip-shaped adhesive strip 17, The pressure-sensitive adhesive layer 19 is formed in three rows of lines extending in the width direction so as to reach both sides.

This packaging bag 10 is manufactured by the procedure as shown in FIG. First, heat-sensitive adhesive is printed in the form of horizontal “B” and “I” from the part that should be the flap part at the upper end of the film to the part that should be the rear sheet part, and the upper end of the flap is bonded. An adhesive layer that forms the band 14, the U-shaped adhesive band 16 in the middle of the flap, and the flap lower end band-shaped adhesive band 17 is formed (FIG. 3A). Next, the lower end of the film is overlapped and folded at a position shifted from the upper end (FIG. 3B). Then, the pressure sensitive adhesive layer 19 is formed by coating the front sheet portion 12 with a pressure sensitive adhesive in a three-row band at a position slightly below the upper end 15 (FIG. 3C). Next, the flap portion 13 is bent forward with the center line of the flap upper end adhesive band 14 as the bending position (FIG. 3D). And after cutting a lower end (FIG.3 (E)), a heat sensitive adhesive is adhere | attached with a heating press (FIG.3 (F)). Finally, both sides are heat sealed (FIG. 3G).

As shown in FIG. 4, the manufactured packaging bag 10, after the

contents

21, 22, and 23 are stored by an automatic filling device or the like with the lower end opening 20 facing upward, the lower end opening 20 is heat-sealed. close. As a result, the

contents

21, 22, and 23 are stored in a sealed state. This is because the flap portion 13 is bonded in a state where the upper end 15 of the front sheet portion 12 is blocked from the outside by the flap upper end adhesive band 14 and the flap middle U-shaped adhesive band 16. In addition, when the contents 21 and the like are stored in the state shown in FIG. 4, the contents powder and the like are prevented from entering the pressure-sensitive adhesive layer 19. Therefore, it can also be used for contents that should avoid moisture, such as confectionery. In this embodiment, the flap lower end strip adhesive strip 17 is also provided, so that the pressure-sensitive adhesive layer 19 is securely protected by the flap portion 13 before opening. This prevents foreign matter from adhering to the pressure-sensitive adhesive layer 19 before opening and impairing resealability.

If the finger hook 18 at the lower end of the flap portion 13 of the packaging bag 10 containing the contents 21 and the like is held in this manner and pulled upward, the flap lower end strip adhesive strip 17 and the flap middle U-shaped strip 16 Is peeled off, the flap portion 13 can be opened and the contents 21 can be taken out (see FIGS. 5A to 5C). At this time, the flap upper end adhesive band 14 formed at the upper end of the flap portion 13 is in a strong adhesive state because the adhesive layer is formed so as to be double-sided bonded, and when this is pinched with a finger and pulled, Peeling is stopped at the part. On the other hand, the flap lower end band-like adhesive band 17 and the flap middle U-shaped adhesive band 16 are formed with an adhesive layer so as to be bonded on one side, and can be easily peeled by pinching with a finger and pulling.

After taking out the contents 21, the flap part 13 is returned to its original position, and the pressure-sensitive adhesive layer 19 is pressed with a finger to be resealed. At this time, since the upper end of the flap portion 13 is firmly bent and the upper end is bonded to the inner surface of the rear sheet portion 11 by the flap upper end adhesive band 14, almost no force is generated to jump upward. do not do. Therefore, it can be resealed in a state where the flap does not naturally open due to the adhesive force of the pressure sensitive adhesive.

In addition, as the back sheet | seat part 11, the front sheet | seat part 12, and the flap part 13, for example, the plastic film made from polyolefin resin (For example, the OPP film thickness 30micro by Santox, the CPP film thickness 30micro by the company, etc.). ), A heat-sensitive adhesive of ethylene-vinyl acetate / chlorine PP type (for example, trade name “Seikadine 1001 B-58 (H)” manufactured by Dainichi Seika Kogyo Co., Ltd.) is used. As the pressure-sensitive adhesive, those having an ethylene copolymer system (for example, trade names “Durotac 9Z910”, “Instant Lock ZM105T”, and “Instant Lock ZM105BD” manufactured by Nippon NC Co., Ltd.) can be used. Of course, it is not limited to these.

The packaging bag 30 of Example 2 is shown in FIG. The packaging bag 30 of the second embodiment has substantially the same configuration as the packaging bag 10 of the first embodiment, and reseals the upper part of the rear sheet portion 31 and the front sheet portion 32 that are heat-sealed to each other by heat sealing. A flap portion 33 is provided, and the flap portion 33 is bonded to the rear sheet portion 31 by a heat sensitive adhesive so as to be in a double-sided adhesive state with a flap upper end adhesive band 34 within a predetermined height range from the upper end.

The upper end 35 of the front sheet portion 32 is configured to be lower than the flap upper end adhesive band 34, and the flap portion 33 is in the middle of the flap with respect to the front sheet portion 32 and the rear sheet portion 31 in the vicinity of the lower end and on both sides. It is bonded with a U-shaped adhesive band 36 and a flap lower end band-shaped adhesive band 37.

Here, unlike the packaging bag 10 of the first embodiment, the flap lower end band-like adhesive band 37 is configured to be in a position where no finger hook is provided at the lower end of the flap. Instead, a perforation 41 that crosses the flap portion 33 in the width direction is formed at a position immediately above the adhesion portion at the lower end of the flap by the flap lower end belt-like adhesive band 37.

At the time of opening, the lower end portion 42 of the flap can be cut into a strip shape by the perforation 41, thereby forming a finger hanging portion 43 (see FIG. 6C). The following is to open the finger-holding portion 43 by pulling it with a finger, and after taking out the contents, the flap portion 33 is returned to the original, and the pressure-sensitive adhesive layer 39 is pressed and adhered with the finger. Reseal.

The packaging bag 30 of the second embodiment can be understood at a glance whether it is already opened or not opened by cutting the lower part from the perforation 41. In addition, also in the packaging bag 10 of Example 1, if it is a product made from a transparent film, it should be understood at a glance whether it has been opened or not opened by using an adhesive that turns white when peeled off. be able to.

As Example 3, FIG. 7 shows a state in which a manual is written on the flap portion. In the third embodiment, as shown in the drawing, the flap portion 53 is “opening: pull up in the direction of ↑ and peel up to the upper line.”, “Closing: press from above and seal.”, “ By printing a manual such as “Open up here”, handling becomes even easier. Further, the position of the pressure-sensitive adhesive layer 59 is also indicated by a band, so that the resealing operation can be further facilitated.
[Summary of Examples 1 to 3]

According to these examples, since the adhesive coating and the adhesive coating are doubled at almost the same position, the stickiness peculiar to the adhesive is strong against impact and reduces the risk of bag breakage. If a release agent is applied to the flap portion, the adhesive coating portion can be easily opened by the release agent, and opening of the adhesive coating portion can play a role in preventing tampering.

In addition, it can be resealed simply by pressing the flap with the crease, and it does not scatter leftovers in the car or the like. It is not an open form, and can be repeatedly opened and resealed without damaging the packaging bag, and can be reused as a simple storage bag after the entire contents are consumed.

And although it is formed by coating with a pressure-sensitive adhesive and an adhesive (if necessary, a release agent), both have a small application area, a method of laminating a film having an adhesive resin layer on a sealant film, and a delamination agent In addition to the overwhelming cost merit compared to the method of using a multi-layer tape provided with a plastic tape and the method of mounting a plastic fastener, there are features that the material composition of the film is not selected.

In other words, OPP single layer is possible, regardless of whether it is multilayer or single layer, polyethylene, nylon, polyester, aluminum foil or aluminum vapor deposition film can be used, and how they are laminated is also effective. Demonstrate.

This means that it is effective for the exterior of PTP packaging and light weight packaging such as confectionery, miscellaneous goods, dried food, and agricultural products, excluding liquid packaging and heavy packaging that require high heat sealing strength. is doing.

The packaging bag 70 of Example 4 is shown in FIG. The packaging bag 70 of the fourth embodiment has substantially the same configuration as the packaging bag 30 of the second embodiment. One of the differences is that the lower part of the perforation 41 is formed so as to be cut out by forming a slit 81 in the center and opening left and right from the middle.

Moreover, in the packaging bag 70 of Example 4, as shown in FIG. 8, the surface of the front sheet part 32 and the inner surface of the flap part 33 are sensed on both the left and right sides so as to straddle the upper end 35 of the front sheet part 32. The point which formed the pressure-sensitive adhesive layers 71 and 71 is also a different point.

According to Example 4, by providing the central slit 81, it is easy to cut off the lower end portion of the flap at the time of opening. Further, the presence of the pressure-sensitive adhesive layers 71, 71 on both the left and right sides can enhance the sealing performance at the time of resealing after opening.

The packaging bag 100 of Example 5 is shown in FIG. The packaging bag 100 of Example 5 is provided with a flap part 103 on the upper part of the rear sheet part 101 and the front sheet part 102 whose both sides are heat-sealed by heat sealing.

Here, the flap portion 103 has a structure in which a range of a predetermined height from the upper end thereof is folded forward in a state where the flap portion 103 is adhered to the rear sheet portion 101 in a dot shape. Hereinafter, this point-like adhesive portion is referred to as a flap upper-end point-like adhesive band 104.

The upper end 105 of the front sheet portion is configured to be lower than the flap upper end point-like adhesive band 104. Then, as shown in FIG. 9 (A), the flap portion 103 has a U-shaped adhesive band (both ends bent vertically downward so as to reach the flap upper point dotted adhesive band 104 on both sides). Hereinafter, it is referred to as “a middle flap-shaped adhesive band”) 106. As shown in FIG. 9B, the U-shaped adhesive band 106 in the middle of the flap crosses the position immediately below the upper end 105 of the front sheet portion when the flap is folded back. Moreover, the flap part 103 is provided with the flap lower end strip | belt-shaped adhesive strip 107 which cross | intersects the position of predetermined height from the flap lower end in the width direction, as shown in FIG.9 (B). And it is adhere | attached with the heat sensitive adhesive with respect to the front sheet | seat part 102 and the back surface sheet | seat part 101. FIG.

Further, the flap portion 103 is provided with a perforation 111 that crosses the position immediately above the flap lower end band-like adhesive band 107 in the width direction in FIG. 9B. A slit 113 that reaches the downward apex of the triangular tongue 112 from the lower end of the center is formed in the portion ahead of the perforation 111 so that the downward triangular tongue 112 can be cut off at the center. Therefore, when the slit 113 is opened to the left and right at the time of opening, a finger-hanging portion is formed that leaves a triangular tongue 112 that is easy to pick when opening the flap.

Further, as shown in FIG. 9A, the front sheet portion 102 has a surface below the upper end 105 at a predetermined height and between the U-shaped adhesive band 106 and the lower flap band adhesive band 107 in the middle of the flap. The pressure-sensitive adhesive layer 121 is formed in three rows of lines extending in the width direction so as to reach both sides. Moreover, in the packaging bag 100 of Example 5, as shown to FIG. 9 (A), the surface of the front sheet | seat part 102 and the flap part 103 of both sides are straddled so that the upper end 105 of the front sheet | seat part 102 may be straddled. Pressure sensitive

adhesive layers

122, 122 are formed on the inner surface.

According to the packaging bag 100 of Example 5, the part ahead of the perforation 111 on the lower end side of the flap part 103 can be easily cut out so as to open from the center to the left and right at the slit part. Then, since the downward triangular tongue 112 remains after cutting, the tongue 112 can be picked and the flap 103 can be pulled upward to open the tongue. The presence of the tongue piece 112 facilitates opening. The process up to this point is the same as that of the packaging bag 70 of the fourth embodiment. In the packaging bag 100 of the fifth embodiment, since the folded portion of the flap portion 103 is bonded in a number of dot shapes, this portion can also be peeled off. That is, when the triangular tongue 112 is pulled slightly upward toward the upper side, the portion where the flap 103 and the rear sheet 101 are bonded to each other is a large number of dots, and the flap 103 and the rear sheet 101 can be easily peeled off. As a result, the flap portion 103 can be extended, and the contents can be easily taken in and out.

The packaging bag 130 of Example 6 is shown in FIG. The packaging bag 130 of Example 6 is substantially the same as the packaging bag 100 of Example 5, but differs in that a perforation 151 is formed at the folding position of the U-shaped adhesive strip 106 in the middle of the flap. . Since the perforation 151 is provided, the flap 103 can be cut off at the top perforation 151 when the flap 103 is extended when opened. At the time of resealing after the flap part 103 is cut off, the rear sheet part 101 is folded at a crease line 152 slightly above the upper end 105 of the front sheet part 102, and a pressure sensitive adhesive layer 121, By sealing the upper end portion of the rear sheet portion 101 on 122 and pressing it, it can be resealed. The perforation 111 for opening, the slit 113, the perforation 151 for cutting off the flap, and the crease line 152 for resealing are formed by pressing the rear sheet portion 101 in the manufacturing process of the packaging bag 130. deep.

As mentioned above, although the Example of this invention was described, this invention is not limited to these embodiment, It can implement variously within the range which does not deviate from the summary.

For example, the folded portion at the upper end of the flap may be heat-sealed by heat sealing. In Example 1, pressure sensitive

adhesive layers

71 and 71 may be formed on both sides as in Example 4.

The present invention can be used when a part of the contents is taken out and used and the rest is stored, and is used as a packaging bag for storing various articles such as foods, miscellaneous goods, and PTP (Press Through Package) in the pharmaceutical field. it can.

10 ... Packaging bag (Example 1)
DESCRIPTION OF SYMBOLS 11 ... Rear surface sheet part 12 ... Front sheet part 13 ... Flap part 14 ... Flap upper end adhesive band 15 ... Upper end of front sheet part 16 ... U-shaped adhesive band 17 in the middle of the flap ... Flap lower end band-like adhesive band 18 ... Fingering part 19 ... Pressure sensitive adhesive layer 20 ...

Lower end opening

21,22,23 ... Contents 30 ... Packing bag (Example 2)
31 ... Rear sheet part 32 ... Front sheet part 33 ... Flap part 34 ... Flap upper end adhesive band 35 ... Upper end of front sheet part 36 ... Flap middle U-shaped adhesive band 37 ... Flap bottom strip adhesive strip 39 ... Pressure sensitive adhesive layer 41 ... Perforation (for opening)
42 ... lower end of flap 43 ... finger hook 50 ... packaging bag (Example 3)
53 ... Flap part 59 ... Pressure sensitive adhesive layer 70 ... Packaging bag (Example 4)
71 ... Pressure-sensitive adhesive layer 81 ... Slit 100 ... Packaging bag (Example 5)
101 ... Rear sheet part 102 ... Front sheet part 103 ... Flap part 104 ... Flap upper end point-like adhesive band 105 ... Front sheet part upper edge 106 ... Flap middle U-shaped adhesive Band 107 ... Flap bottom band adhesive band 111 ... Perforation (for opening)
DESCRIPTION OF SYMBOLS 112 ... Downward triangular-shaped tongue piece 113 ... Slit 121 ... Pressure-sensitive adhesive layer 122 ... Pressure-sensitive adhesive layer 130 ... Packaging bag (Example 6)
151 ... perforation (for flap cutting)
152 ... crease line

Claims

A packaging bag comprising: a rear sheet portion that is heat-sealed on both sides and a flap portion having resealability at the top of the front sheet portion, and the following configuration.
(1) The flap portion has a structure in which a range of a predetermined height from the upper end is folded forward in a state where the flap portion is bonded or fused in a band shape to the rear sheet portion.
(2) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a band shape.
(3) The flap part has a flap middle adhesive band that cuts off the upper end of the front sheet part from the outside so that the upper end reaches a part bonded or fused in the band shape, and the vicinity of the lower end of the flap in the width direction. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a transverse flap lower end adhesive band.
(4A) A finger-hanging portion that is not bonded is left in a predetermined height range from the lower end of the flap portion.
(5) A pressure-sensitive adhesive layer is formed on the surface of the front sheet portion in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
A packaging bag comprising: a rear sheet portion that is heat-sealed on both sides and a flap portion having resealability at the top of the front sheet portion, and the following configuration.
(1) The flap portion has a structure in which a range of a predetermined height from the upper end is folded forward in a state where the flap portion is bonded or fused in a band shape to the rear sheet portion.
(2) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a band shape.
(3) The flap part has a flap middle adhesive band that cuts off the upper end of the front sheet part from the outside so that the upper end reaches a part bonded or fused in the band shape, and the vicinity of the lower end of the flap in the width direction. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a transverse flap lower end adhesive band.
(4B) The flap portion is formed with a cut line formed by a perforation located on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(5) A pressure-sensitive adhesive layer is formed on the surface of the front sheet portion in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
The packaging bag according to claim 1, further comprising the following configuration.
(6) The flap mid-adhesive band reaches on both sides to a portion bonded or fused to the upper end of the flap portion in a state before the flap is folded back, and below the upper end of the front sheet portion. It is formed in a shape that forms a U-shaped opening that crosses the width direction.
The packaging bag according to any one of claims 1 to 3, further comprising the following configuration.
(7) The lower ends of the front sheet portion and the rear sheet portion are open, and can be fused by heat sealing after the contents are stored.
The packaging bag according to any one of claims 1 to 4, further comprising the following configuration.
(8) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.
A packaging bag comprising: a rear sheet portion that is heat-sealed on both sides and a flap portion having resealability at the top of the front sheet portion, and the following configuration.
(11) The flap portion has a structure in which a range of a predetermined height from the upper end of the flap portion is folded forward in a state where the flap portion is bonded or fused to the rear sheet portion in a number of points.
(12) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a number of dot shapes.
(13) The flap portion includes a flap middle adhesive band that cuts off the upper end of the front sheet portion from the outside so that the upper end reaches a portion bonded or fused in a number of points, and the vicinity of the lower end of the flap. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a flap lower end adhesive band that crosses in the width direction.
(14) The flap portion has a perforation line formed on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(15) On the surface of the front sheet portion, a pressure-sensitive adhesive layer is formed in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
(16) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.
(17) A slit that reaches the downward apex of the triangular tongue piece from the lower end of the center is formed so that the portion beyond the perforation can be cut out leaving a downward triangular tongue piece at the center.
A packaging bag comprising: a rear sheet portion that is heat-sealed on both sides and a flap portion having resealability at the top of the front sheet portion, and the following configuration.
(11A) The flap portion has a structure in which a range of a predetermined height from the upper end thereof is folded forward with a range of points adhered or fused to the rear sheet portion, and the folded portion A perforation is formed in the top in the width direction so that it can be cut off.
(12) The upper end of the front sheet portion is configured to be lower than a portion where the flap portion and the rear sheet portion are bonded or fused in a number of dot shapes.
(13) The flap portion includes a flap middle adhesive band that cuts off the upper end of the front sheet portion from the outside so that the upper end reaches a portion bonded or fused in a number of points, and the vicinity of the lower end of the flap. It is bonded to the rear sheet portion and the front sheet portion with a heat-sensitive adhesive so as to form a flap lower end adhesive band that crosses in the width direction.
(14) The flap portion has a perforation line formed on the flap lower end adhesive band, and a finger hook portion can be formed by cutting a portion ahead of the perforation. Being.
(15) On the surface of the front sheet portion, a pressure-sensitive adhesive layer is formed in a band shape extending in the width direction at a position sandwiched between the flap middle adhesive band and the flap lower end adhesive band.
(16) A pressure-sensitive adhesive layer is formed on the surface of the front sheet part and the inner surface of the flap part on both the left and right sides so as to straddle the upper end of the front sheet part.
(17) A slit that reaches the downward apex of the triangular tongue piece from the lower end of the center is formed so that the portion beyond the perforation can be cut out leaving a downward triangular tongue piece at the center.