JP2016137919A - Synthetic resin-based packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a useful and beneficial synthetic resin-based packaging bag with an opening/closing tool which has various effects including a high level of airtightness in the closed state of the opening/closing tool, and so on.SOLUTION: Recess/projection shaped parts 18-21 are formed in both side seals 14 and 15 of a bag body 11. Inflated parts after the formation of the recess/projection shaped parts are reduced in volume as compared with the inflated parts before the formation of the recess/projection shaped parts. Within the bag body 11, in the regions of end parts 31 and 32 of opening/closing tools which are in contact with the inner edge part side of each of the side seals 14 and 15, there are formed support layers 26a-26c for supporting the end parts of the opening/closing tools. The recess/projection shaped parts 18-21 and the support layers 26a-26c form a seal structure for preventing leakage between each end part of the opening/closing tools within the bag body 11 and the inner surface of a bag front film, and form a seal structure for preventing leakage between each end part of the opening/closing tools within the bag body and the inner surface of a bag back film. Airtightness between each end part of the opening/closing tools in a closed state and the inner surface of the bag body is maintained via the recess/projection shaped parts 18-21 and the support layers 26a-26c.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a synthetic resin-based packaging bag having an opening / closing tool inside the bag, and more particularly, an improved synthetic resin-based packaging bag for eliminating various problems caused by adhesion failure or deformation of the opening / closing device. About.

  As is well known, synthetic resin bags are widely used in various fields for packaging various articles and products. Among them, those equipped with an opening and closing tool called a chuck, fastener, zipper and the like inside the bag mouth side are highly evaluated in terms of practicality. The main reason is that it is possible to prevent leakage of the packaged item from outside the bag, entry of foreign matter into the bag, alteration of the packaged item, etc., by simply holding the bag mouth tightly with the opening / closing tool. . Of course, this also includes the ability to store the packaged items when not in use safely and easily.

  However, for a synthetic resin packaging bag with an opening / closing tool, special technical considerations are required in order to provide the opening / closing tool including a male opening / closing member and a female opening / closing member inside the bag. It is a male opening and closing member provided on the inner surface of the two films when a sealing process is performed in which a bag front film and a bag back film, which are constituent elements of the bag, are overlapped to form side seals on both sides thereof. This is because both ends of the female opening / closing member exhibit an undesirable behavior due to the sealing process, which leads to a decrease in quality. One typical deterioration in quality is that micro-holes or micro-gaps are formed at both ends of the deformed opening / closing tool or the surrounding area, thereby causing the opening / closing tool to be poorly sealed. About the side seal which is a junction part of this front and back both films, the following malfunctions are known. One is that the film thickness of the side seal part is reduced by thermal shrinkage due to thermal bonding, and the other is melting due to electrical heat treatment, ultrasonic heat treatment, other heat treatment, etc. at the intersection with the chuck. Side seal local bulge due to the chuck material (resin lump) becomes prominent and the side seal part becomes thick, and another one is irregularly deformed and the resin lump is bagged from the side seal. It flows out inside, and the airtightness of the opening / closing part end is inhibited. As is obvious, in the case of an opening / closing device that has a poor airtightness, liquid leakage from the bag containing the liquid itself or a packaged object containing the liquid cannot be sufficiently prevented.

  There has been a prior art for a synthetic resin packaging bag with an opening / closing tool that has taken measures against the airtightness of the opening / closing tool for a long time. Those are disclosed in Patent Documents 1 to 5 below.

  Each technique disclosed in Patent Documents 1 to 5 has achieved a certain result in terms of improving the airtightness of both ends of the opening / closing tool and its peripheral part. There is still room for improvement.

  In the technique of Patent Document 1, the configuration in which the chuck (biting device) and the side seal are involved with each other is as follows. Upper and lower protrusions are formed on the upper and lower sides of the articulating tool at a parallel interval to the articulating tool. The end of the bite, the end of the upper protrusion, and the end of the lower protrusion are respectively interposed in the side seal. The side seal has a welded portion (welded portion of the bite) connected to the end of the bite. In the side seal, a resin lump is interposed between the protrusions on both the upper and lower sides and the bite. Regarding the contents of this document technology, further, the end part of the side seal inner edge part holds the initial form of the end part of the chuck (joining tool) and the end part of each protrusion that are interposed in the side seal. However, the side seal outer edge side part is melted and deformed like the welded part, and the resin mass is formed by the excess molten resin at the end of the bite and each protrusion end flowing into the predetermined part. -ing

In the case of the synthetic resin packaging bag disclosed in Patent Document 1, the following problems <01> to <05> are observed.
<01> In order to ensure the required sealing function, upper and lower protrusions must be newly formed on the film inner surface of the bag. In other words, this adds a special component that is not found in a general packaging bag with a chuck, and this increases costs in terms of both the material and the manufacturing process.
<02> The end of the occlusion tool and the end of each protrusion intervene in the side seal part, but when performing side seal processing under such circumstances, the end of the occlusion tool, the end of the protrusion, etc. Since it is necessary to melt and deform the other part while preventing a part of the deformation, the processing technique becomes extremely difficult. This is because “deformation prevention” and “positive deformation” are mixed in this sealing process. The actual situation of this type of seal processing is that the deformation prevention part is often deformed, and in such a case, the fitting between the male opening and closing member and the female opening and closing member at the end of the bite is not possible. It will be difficult to do properly.
<03> In the side seal processing, when the resin mass is formed by the excess molten resin at the end of the occlusion tool and the end of each protrusion, the gap between the upper protrusion and the occlusion tool or between the lower protrusion and the occlusion tool During this period, it is extremely difficult to quantitatively and accurately flow in excess molten resin. In addition, when the end of the bite is deformed as described above, it becomes more difficult to form a resin mass due to excess molten resin inflow.
<04> If the technical difficulty at the time of side seal processing becomes high as described above, it will be difficult to ensure the airtightness of this part due to the presence of minute holes and minute gaps at the end of the bite. Become. Therefore, the yield of non-defective products including airtightness will be low, which will affect the product cost.
<05> The welded portion on the side seal is swelled thickly in an unnatural shape because the end of the occlusion tool and each protrusion are only melted and hardened without being crafted. In addition, the end portions of the bite and the end portions of the protrusions tend to be deformed for the reasons already described. Such a side seal having a welded portion, an end of a bite, an end of each protrusion, etc. tends to deteriorate the appearance.

  In the case of the bag with a chuck disclosed in Patent Document 2, two parallel chucks are provided inside the bag. A first point seal applied to the plastic film portion adjacent to both chucks while avoiding the two chucks, and a second point seal including both chuck ends so as to overlap the first point seal It is equipped with a point seal. Regarding the contents of this document technique, further, the first point seal is applied in parallel and close to the chuck end, but the first point seal and the chuck end are separated from each other. In particular, a considerable gap is formed between the root portion of the chuck female claw and the first point seal. The 2nd point seal with respect to this is given so that it may overlap with the 1st point seal, more specifically, it may overlap with the three 1st point seals in an orthogonal state. Thus, an E-shaped point seal is formed at the chuck end.

In the case of the bag with a chuck disclosed in Patent Document 2, the following problems <06> to <09> are observed.
<06> When the second point seal is applied after the first point seal, the seal pressure at that time greatly acts on the chuck end, and the chuck end is crushed. That is, the chuck end is greatly deformed, and it is difficult to properly fit the male and female claws at the chuck end. This deformation also causes a gap between the male and female claws at the chuck end. In addition, there is a gap between the root portion of the chuck female claw and the first point seal. As is obvious, the presence of such two gaps reduces the reliability of the airtightness at the chuck end as compared to the case without the two gaps.
<07> Since the width of the bag opening is narrowed by the two lateral first point seals that project greatly from the side seals toward the inside of the bag, the removal of the packaged goods will not be smooth. In particular, it is even difficult to take out a packaged article or the like staying at a corner formed by the side seal and the first point seal.
<08> On each side seal side, there are two first point seals parallel in the horizontal direction and one second point seal in the vertical direction. The seal shape combining these two types of point seals is a U-shape. This is exactly the same as aligning both ends of the second point seal so that it crosses the two ends of the first point seal at a right angle when the second point seal is performed after the first point seal. Must. Therefore, the latter second point sealing process becomes difficult.
<09> The second point seal is performed after the first point seal. Therefore, this sealing process is not completed in one process but is converted into two processes, resulting in a process uneconomical process.

  In the case of the storage bag for breast milk or the like disclosed in Patent Document 3, an airtight holding chuck is provided on the upper inner surface of the bag body on the bag mouth side, and a fitting strength maintaining chuck is provided on the lower side thereof. . A substantially U-shaped leakage prevention seal portion surrounding the side portions and side ends of both chucks is provided in a region including the side portions and side ends of both chucks from the side seal side.

In the storage bag for breast milk or the like disclosed in Patent Document 3, the U-shaped leakage prevention seal portion provided therein is technically the same as the U-shaped seal formed by the first point seal and the second point seal of Patent Document 2. It is common. Therefore, it can be said that the bag described in this document has the same problem as pointed out in Patent Document 2.
The following <06>-<09> issues are seen.

  In the bag with a chuck disclosed in Patent Document 4, a portion near the outer edge of the side seal is crushed in a solid state where no gap remains, and a portion near the inner edge of the side seal is formed in the gap. It is crushed in the remaining deformation state. In this case, when the former is a solid portion and the latter is a deformed portion, the chuck end portion of the side seal is processed into a solid portion that is completely crushed or a deformed portion that is incompletely crushed. By the way, when all the chuck end parts intervening in the side seal are processed as a fully crushed solid part, the deformation amount is large and the influence extends to the chuck part inside the bag. Inadequate fitting of the end portions is likely to occur. On the other hand, when the incompletely crushed deformed portion as in Patent Document 4 is left on the side seal, the amount of deformation at that time is reduced, so that the fitting inappropriateness of the end portion of the chuck engagement tool is alleviated.

  On the other hand, the bag with a chuck of Patent Document 4 is forced to take measures against the gap remaining in the deformed portion of the side seal. This is because the risk of fluid leakage is increased by leaving the deformed portion with the gap remaining, and this countermeasure is unavoidable. In the invention of Patent Document 4, this is an assumption. As a countermeasure, in the case of the bag with a chuck, an upper spot seal portion and a lower spot seal portion are provided on the upper side and the lower side of the end portion of the chuck engagement tool. More specifically, both the spot seal portions are provided in a short lateral direction from the side seal region to the inside of the bag. The side seal of the zippered bag is also provided with a short vertical ultrasonic seal portion adjacent to the deformed portion in a spot shape. Thus, the bag with a chuck disclosed in Patent Document 4 exhibits a suitable sealing effect by taking these sealing measures.

In the case of the bag with a chuck disclosed in Patent Document 4, the following problems <10> to <13> are observed.
<10> Rather than making the full end (completely crushed part) of the chuck end interposed in the side seal, it remains as a deformed part in an incompletely crushed state. A wide side seal is required to form two parts such as the solid part and the deformed part.
<11> It is difficult to make a side seal coexist with the above-mentioned deformed portion for suppressing the spread of deformation to the end portion of the above-mentioned solid portion or chuck articulator having a leakage prevention function.
<12> Since there is a gap between the upper and lower spot seal portions and the end of the chuck occlusion tool, there is a risk that fluid may enter here. On the other hand, a gap remains in the deformed portion of the side seal, and the airtightness is not sufficient. Therefore, the technical difficulty of the spot seal in consideration of such gaps and deformed portions is increased.
<13> The solid and deformed parts of the side seal are left as high as the heel. In other words, since this has nothing to do with the operability of the end portion of the chuck engagement tool that is important in use, technical considerations for improving the operability of opening and closing the chuck are lacking.

  In the case of the bag with a chuck disclosed in Patent Document 5, the end portions of the female claws and the male claws are ultrasonically sealed before the side seal of the bag body, and then the side seal is applied to the bag body. That's it. In particular, in the end seals of both male and female claws, the ultrasonic seal portion protrudes toward the center of the bag mouth. The bag with a chuck disclosed in this document prevents leakage from the chuck end by doing so.

In the case of the bag with a chuck disclosed in Patent Document 5, the following problems <14> to <16> are observed.
<14> Even though the ends of both male and female claws are ultrasonically sealed before the side seal, when the side seal is applied after that, the end of the chuck bite is deformed. Considering the opening / closing operability of the chuck, it is difficult to steadily produce a good product in the best state.
<15> The technology for ultrasonically sealing the ends of both male and female claws is unique, and this is also a difficult technology. In particular, when applying a special ultrasonic seal while taking into account the deformation of the end of the chuck occlusion device during side sealing, it becomes even more difficult.
<16> The leading end seals of both male and female claws have little contribution to improving the operability of the chuck bite end.

Japanese Utility Model Publication No. 01-058441 Japanese Patent Application Laid-Open No. 07-246670 JP 08-198279 A JP 2001-232698 A JP 2008-114546 A

  The present invention has been made in order to solve the above-described problems, and its purpose is to achieve a high degree of airtightness in the closed state of the opening / closing device and the end portion of the opening / closing device and the soundness of the opening / closing function by the repair.・ Improvement of operability of switchgear ・ Clarification effect of start point of switchgear operation ・ Improved appearance of side seal ・ Eliminates the need for additional materials to solve problems ・An object of the present invention is to provide a synthetic resin-based packaging bag that can satisfy the reduction in the number of steps, the difficulty of processing the end of an opening / closing tool in a side seal, and the cost reduction of a high-quality packaging bag.

The synthetic resin-based packaging bag according to the present invention is characterized by the technical contents described in the following items <21> to <30> as means for solving the problems for achieving the intended purpose.
<21> a packaging bag body and an opening / closing tool for opening and closing the bag mouth, the opening / closing tool comprising a horizontally long male opening / closing member and a horizontally long female opening / closing member,
A male opening and closing member and a female opening and closing member of the opening / closing tool can be engaged with the inner surface of the bag front film and the inner surface of the bag backing film on both sides of the bag body. Are provided facing each other, and
Side seals are applied to both sides of the bag, and
Both ends of the opening / closing tool comprising the male opening / closing member and the female opening / closing member intersect with the side seals on both sides of the bag body and are interposed on both side seals, and both sides by the both ends of the opening / closing tool interposed. In a synthetic resin packaging bag that assumes that the seal is full,
The bulging portions on both side seals of the bag body are formed as a concave / convex shaping portion in which convexities and concave grooves are mixed, and of these convexities and concave grooves, the concave portions along the length direction of the opening / closing tool are formed. The inward end of the groove extends laterally inward of the bag from the side edge of both side seals, and the bulge after formation of the concavo-convex shaping part is smaller in volume than the bulge before formation of the concavo-convex shaping part. And
In the opening / closing end region that is inside the bag body and is in contact with the inner edge side of both side seals, a support layer that is in close contact with the opening / closing end surface and supports the opening / closing end is provided. Formed of a material part accompanying the volume reduction of the part, and
The concave / convex shaping portion and the support layer form a seal structure for preventing leakage between both ends of the opening / closing tool in the bag and the inner surface of the bag front film, and between the both ends of the opening / closing tool in the bag and the inner surface of the bag backing film. It has a seal structure for preventing leakage, and
A synthetic resin-based packaging bag, wherein the airtightness between both ends of the opening / closing tool in the closed state and the inner surface of the bag body is maintained through the concave-convex shaping portion and the support layer.
<22> With respect to a horizontally long opening / closing device comprising a horizontally long male opening / closing member and a horizontally long female opening / closing member that can be engaged with each other, the above-mentioned single opening / closing device is provided at the bag mouth side portion in the bag body <21 The synthetic resin packaging bag described in the item>.
<23> Regarding a horizontally long opening / closing device comprising a horizontally long male opening / closing member and a horizontally long female opening / closing member that can be engaged with each other, a plurality of the opening / closing devices are provided in parallel to each other at a bag mouth side portion in the bag body. The synthetic resin packaging bag described in <21> above.
<24> A side seal selected from one of the side seals on both sides of the bag body, and a concavo-convex shaped portion is formed on one of the front and back surfaces of the side seal on the one side The synthetic resin-based packaging bag described in any one of <21> to <23> above.
<25> The above <21> to <23>, wherein a concave / convex shaping portion is formed on the side seal surface on one side of the bag body, and a concave / convex shaping portion is formed on the back surface of the side seal on the other side of the bag body. A synthetic resin packaging bag described in any of the above.
<26> The synthetic resin-based packaging bag according to any one of <21> to <23>, wherein an uneven shaping portion is formed on one of the front and back surfaces of the side seals on both sides of the bag body.
<27> The synthetic resin-based packaging bag according to any one of <21> to <23>, wherein concave and convex portions are formed on both front and back surfaces of the side seals on both sides of the bag body.
<28> The synthetic resin-based packaging bag according to any one of <21> to <27>, wherein the concave / convex shaping portion has a single concave groove.
<29> The synthetic resin-based packaging bag according to any one of <21> to <27>, wherein the concave / convex shaping portion has a plurality of concave grooves.
<30> The synthetic resin-based packaging bag according to any one of the above <25> to <27>, wherein the uneven shaping portion having a single groove and the uneven shaping portion having a plurality of grooves are mixed.

The synthetic resin packaging bag of the present invention has the effects described in the following <31> to <41>.
<31> The bulging portions on both side seals of the bag body are not mere bulging portions, but are concavo-convex shaping portions in which protrusions and grooves are mixed. Such a concavo-convex shaping part is obtained by shaping a bulging part by pressurization in a heat-softened state. Regarding unevenness shaping parts, more specifically, micropores and minute gaps remaining in the bulging part are eliminated when it is changed to a dense and solid structure under pressure during shaping. . By the way, since the micro holes and micro gaps scattered at the end of the opening / closing tool cause a decrease in air tightness, the air tightness of the opening / closing tool in the closed state in the case of such an uneven shaping part having no micro holes or micro gaps. This forms a seal structure for preventing leakage of a predetermined portion in cooperation with a support layer described later. Therefore, in the case of the synthetic resin packaging bag of the present invention, the packaged item is difficult to leak from the inside of the opening / closing device closed state.
<32> In terms of the relative relationship between the unshaped bulging part and the already-shaped concavo-convex shaping part, in the case of the bulging part, the end of the opening / closing tool is crushed and exhibits an inflated shape with an indefinite extent. However, in the case of the concavo-convex molded portion, in the process of shaping the bulge portion into a predetermined shape, the constituent materials of the bulge portion are gathered together while raising the bulge portion. Therefore, in the case of the concavo-convex molded portion, the bulge shape is expanded more than the bulge portion, and the bulge shape having an amorphous spread is corrected because the bulge portion is narrowed to the bulge state. This narrowing action also extends to the end of the opening / closing tool near the inner edge of the side seal. B) Good results of normalizing the opening / closing function at the end of the opening / closing tool. Therefore, it can be said that the uneven shaping part of the side seal is useful and beneficial.
<33> The concave / convex shaping portion of the side seal is useful and useful from the following viewpoints. [Regarding the concave groove of the concave / convex shaping portion] This is formed in the concave / convex shaping portion as opposed to a part of the bulging portion being concave and the volume decreasing. The volume decrease at this time is displaced from the inner side of the side seal along the length direction of the concave groove and the end of the opening / closing tool to the inside of the bag body (the opening / closing end of the opening / closing tool). It becomes a support layer for adhering closely to the tool end surface and supporting the opening / closing tool end. [Regarding the Support Layer] As is apparent from the above description, the end of the opening / closing tool interposed in the side seal is crushed during the side seal and deforms into a full portion with a microhole or microgap, Since the deformation also affects the end of the opening / closing tool in the bag body, the end of the opening / closing member of the opening / closing member and the end of the opening / closing member of the opening / closing member are not a little deformed. However, the volume reduction (surplus material) that is displaced to the opening / closing tool end in the bag during the formation of the concavo-convex shaping part pushes it back to the original state while closely contacting the deformed opening / closing tool end surface. That is, when the surplus material that has received the groove forming pressure is displaced along the end of the opening / closing tool, the opening / closing end of the opening / closing tool is pushed back in the repair direction. The deformation is repaired (corrected). This is why the support layer is a support layer. [Result] The supporting layer forms a seal structure for preventing leakage of a predetermined portion in cooperation with the above-described uneven shaping portion. Therefore, in the case of the synthetic resin packaging bag of the present invention, the packaged item is difficult to leak from the inside of the bag in the closed state of the opening / closing tool from such a viewpoint.
<34> The support layer that supports the end of the opening / closing tool also makes the opening / closing function of the opening / closing tool sound by repairing the end of the opening / closing tool. That is, even when the end of the opening / closing tool is crushed or deformed during side sealing, the function of the end of the opening / closing tool is restored by the repair support by the support layer. Therefore, in the case of the opening / closing tool in the synthetic resin packaging bag of the present invention, an appropriate function is exhibited including its end.
<35> The opening / closing operation of the opening / closing tool is well known, not to mention. Among them, regarding the general operation when closing the opening / closing tool, this means that one end of the opening / closing tool is sandwiched between the thumb and the second finger from the outside of the bag so that the male opening / closing member and the female opening / closing member are engaged with each other. The fingertips (fingertips) of the two fingers are slid from one end of the opening / closing tool to the other end of the opening / closing tool while maintaining the state. When closing the opening / closing tool, there is also a tendency that the closing of the opening / closing tool starts from the position closest to one end of the opening / closing tool. The closest position is a side seal that is connected to one end of the opening / closing tool. The reason why the closing of the opening / closing tool is started from the side seal is to prevent a part of the opening / closing tool from being left unclosed at least. Therefore, at the time of closing operation of the opening / closing tool based on this, the predetermined part of the side seal in contact with one end of the opening / closing tool is sandwiched between the two fingers described above, and the two fingers are placed along the opening / closing tool on the other end side of the opening / closing tool It will slide to. When the uneven | corrugated shaping part of this invention is seen, this exists in a side seal and is connected with the opening-and-closing tool edge part. This concave / convex shaping portion has a concave groove, and this is along the horizontal direction of the opening / closing tool (the direction extending from one end of the opening / closing tool to the other end). This horizontally long concave groove in the concave / convex shaping portion serves as a fingertip guide when the fingertip applied to the concave / convex shaping portion of the side seal is slid toward the end of the opening / closing tool. That is, the concave groove of the concave / convex shaping portion guides the fingertip in the length direction of the concave groove while accurately preventing the fingertip from shifting to the other, and accurately guides it to the end of the opening / closing tool. Therefore, in the case of the synthetic resin packaging bag of the present invention, the fingertip when starting the closing of the opening / closing tool from the side seal side can be guided and guided accurately and smoothly to the opening / closing end of the opening / closing tool. Since the device can be closed normally, the operability of the opening / closing tool, particularly the operability when closing the opening / closing device is improved.
<36> When the predetermined part of the side seal is clamped with the two fingers as described above and the closing operation of the opening / closing tool is performed, it is more important to keep the side seal pinched than it is unclear. Desirable for operation. About this, the obvious ditch | groove in an uneven | corrugated shaping part plays the marker function which specifies the start location. Therefore, in the case of the synthetic resin-based packaging bag of the present invention, the concave groove of the concave / convex shaping portion that exhibits the clear effect of the opening / closing operation of the opening / closing tool helps to further improve the operability when closing the opening / closing tool.
<37> Since the end of the opening / closing tool interposed in the side seal becomes a bulging portion that has been crushed when the side seal is applied, the appearance of a part on the side seal becomes unnatural. On the other hand, the synthetic resin-based packaging bag of the present invention is formed into a concavo-convex shaping portion having a good appearance by adjusting the shape of its unpleasant bulge. Therefore, in the case of the synthetic resin packaging bag of the present invention, the appearance of the side seal is improved.
<38> The uneven shaping part and the support layer in the present invention lead to the above-mentioned various effects. This useful and beneficial portion is formed by shaping the bulging portion rather than adding a special component or constituent material. Therefore, in the case of the synthetic resin packaging bag of the present invention which does not require any additional material for solving the problem, it can be said that it is extremely advantageous for solving the problem.
<39> The uneven shaping portion and the support layer in the present invention are formed by a small number of steps after the side seal treatment. Depending on the embodiment, it is only necessary to add one step to the conventional bag manufacturing process, such as performing the shaping process after the side seal process. Therefore, in the case of the synthetic resin packaging bag of the present invention, the number of steps of the opening / closing tool end processing in the side seal can be set to be extremely small.
<40> The concave / convex shaping portion and the support layer in the present invention are formed by shaping the bulging portion described above. Moreover, since it can be formed by processing only a part on the side seal by heat and pressure molding using a shaping jig, it does not require any special processing technology difficulty. Therefore, in the case of the synthetic resin-based packaging bag of the present invention, the difficulty level of the opening / closing tool end processing in the side seal can be reduced.
<41> Since the synthetic resin-based packaging bag of the present invention has the above-mentioned usefulness and utility for packaging an article to be packaged, it can be said that the quality is improved in this respect. In the case of the present invention, this high quality packaging bag can be obtained with a small number of steps including the opening / closing end processing of the side seal, and it is economical without requiring any additional material. Can be produced. Therefore, in the case of the present invention, it is possible to provide a synthetic resin packaging bag with an opening / closing tool that has been improved in quality while satisfying cost reduction.

It is the front view and right view which showed 1st embodiment about the synthetic resin type | system | group packaging bag which concerns on this invention. FIG. 3 is an enlarged left side view of a main part of the synthetic resin packaging bag illustrated in FIG. 1. It is a principal part enlarged front view of the synthetic resin packaging bag illustrated in FIG. It is sectional drawing which follows the AA line of FIG. 3, and sectional drawing which follows the BB line of FIG. It is a principal part perspective view of the synthetic resin type packaging bag illustrated in FIG. It is the principal part perspective view which showed 2nd embodiment about the synthetic resin type packaging bag which concerns on this invention. FIG. 7 is an enlarged left side view of an essential part of the synthetic resin packaging bag illustrated in FIG. 6. It is the principal part perspective view which showed 3rd embodiment about the synthetic resin packaging bag which concerns on this invention. It is a principal part expansion left view of the synthetic resin packaging bag illustrated in FIG. It is the principal part perspective view which showed 4th embodiment about the synthetic resin type packaging bag which concerns on this invention. It is a principal part expansion left view of the synthetic resin type packaging bag illustrated in FIG. It is the principal part perspective view which showed 5th embodiment about the synthetic resin type packaging bag which concerns on this invention. It is a principal part expanded left view of the synthetic resin type packaging bag illustrated in FIG. It is the principal part perspective view which showed 6th embodiment about the synthetic resin type packaging bag which concerns on this invention. FIG. 15 is an enlarged left side view of an essential part of the synthetic resin packaging bag illustrated in FIG. 14. It is the principal part perspective view which showed 7th embodiment about the synthetic resin type packaging bag which concerns on this invention. It is a principal part expansion left view of the synthetic resin type packaging bag illustrated in FIG. It is the principal part perspective view which showed 8th embodiment about the synthetic resin packaging bag which concerns on this invention. It is a principal part enlarged left view of the synthetic resin type packaging bag illustrated in FIG. It is the front view which showed 9th embodiment about the synthetic resin type packaging bag which concerns on this invention. It is a principal part perspective view of the synthetic resin type packaging bag illustrated in FIG. It is the principal part front view which showed 10th embodiment about the synthetic resin type packaging bag which concerns on this invention. It is a principal part perspective view of the synthetic resin type packaging bag illustrated in FIG. It is the front view which showed 11th embodiment about the synthetic resin packaging bag which concerns on this invention. It is a principal part perspective view of the synthetic resin type packaging bag illustrated in FIG. It is explanatory drawing which showed schematically an example of the shaping jig | tool employ | adopted at the manufacturing process of the synthetic resin type packaging bag concerning this invention, and an example of the sealing jig | tool.

  Regarding the synthetic resin packaging bag according to the present invention, first, the basic bag structure, the main bag components, the material of the bag material, and the like will be described.

  As the synthetic resin packaging bags according to the present invention, those illustrated in all the illustrated embodiments and those illustrated in all of the following embodiments have a bag body 11 for the bag front film 12 and the back of the bag. The film 13 is mainly used to form a bag. Alternatively, there is also a case in which the bag body 11 is configured in a bag shape mainly including the bag front film 12 and the bag back film 13 and the side gusset and / or the bottom gusset. Since all the constituent materials in such a case are synthetic resin type, of course, the bag 11 is also synthetic resin type.

  The synthetic resin packaging bag according to the present invention is a synthetic resin system as obvious, but the term “synthetic resin system” in the present invention refers to a single synthetic resin, a heterogeneous synthetic resin. These are broader terms including a combination of the above, a combination of synthetic resin and non-synthetic resin, and the like.

When the synthetic resin packaging bag according to the present invention is made of only a synthetic resin, the synthetic resin is mainly a thermoplastic resin, but in some cases, a thermosetting resin may be employed. More specifically, any one of the synthetic resins listed in the following a to n is selected and adopted, and the synthetic resin is used for the bag front film 12 and the bag back film 13 of the bag body 11. It has become. Polyethylene and polypropylene in the following can be collectively referred to as polyolefin.
a. Ionomer resin b. Various polyethylenes (high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, etc.)
c. Polyvinyl chloride film d. Polyvinylidene chloride film e. Polyvinyl chloride alcohol f. Polypropylene g. Polyester h. Polycarbonate i. Polystyrene j. Polyacrylonitrile k. Ethylene vinyl acetate copolymer l. Ethylene-vinyl alcohol copolymer m. Ethylene-methacrylic acid copolymer n. Nylon (polyimide, polyamide, etc.)

  When the synthetic resin packaging bag according to the present invention is composed of a combination of different kinds of synthetic resins, for example, it is composed of a combination of two or more synthetic resins selected from the above a to n.

  When the synthetic resin packaging bag according to the present invention is made of a composite material, the composite material is made of a laminated film in which a synthetic resin film is internally attached to the inner surface of a non-synthetic resin film (sheet). About this, laminated products made of synthetic resin film and metal foil (example: aluminum foil), laminated products made of synthetic resin film and woven fabric, laminated products made of synthetic resin film and nonwoven fabric, synthetic resin film and mesh And a laminated product made of synthetic resin film and paper. As the synthetic resin in the laminated product, those listed in the above a to n are appropriately selected and adopted. In addition, as this kind of composite material in the present invention, metallized metal-based / non-metal vapor-deposited synthetic resins and ultrafine metal-based / non-metallic materials (for example, titanium oxide, silica glass, etc.) A synthetic resin made of a new nanotechnological material mixed with and adhering to the film can also be used, and depending on the contents, they can be combined with both the films 12 and 13.

  In the synthetic resin packaging bag according to the present invention, opening / closing tools 31 and 41 for opening and closing the bag mouth are provided inside the bag body 11 on the bag mouth side. More specifically, the opening / closing tool 31 is composed of a horizontally long male opening / closing member 32 and a horizontally long female opening / closing member 35, and the opening / closing tool 41 is also a horizontally long male opening / closing member that can freely bite each other. The member 42 and a horizontally long female opening / closing member 45 are included. Furthermore, in one example, the opening / closing tools 31 and 41 are integrally formed on the inner surfaces of the front and back films 12 and 13. In another example, the opening / closing tools 31 and 41 are tape-like bonded to the inner surfaces of the front and back films 12 and 13 by heat sealing means or the like.

  As described above, the opening / closing tools 31 and 41 are called chucks, fasteners, zippers, and the like, and are also called occlusal tools. The synthetic resin, which is the material of the opening / closing tool 31/41, is made of the same material or the same material as the two films 12, 13 when it is integrally formed on the inner surfaces of the front and back films 12, 13. . In addition, the opening / closing tool 31/41 bonded to the inner surfaces of the front and back films 12, 13 may be the same material or the same material as the both films 12, 13, or the both films 12, A synthetic resin having an affinity for 13 is employed. Specific synthetic resins in this case include low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, polypropylene, and the like, and an appropriate one is selected and adopted.

  Below, the thing of 1st embodiment illustrated in FIGS. 1-5 is demonstrated about the synthetic resin type packaging bag which concerns on this invention.

  1 to 5 in which a first embodiment of a synthetic resin packaging bag according to the present invention is shown, a bag body 11 includes a bag surface film 12 and a bag back film 13 that are superposed on each other, and The predetermined peripheral edges of the films 12 and 13 are sealed to form a bag shape. Therefore, the bag body 11 has a plurality of seal portions. More specifically, side seals 14 and 15 are provided on both sides of the bag body 11 via heat sealing means, and heat sealing means are also provided on the upper side and lower side of the bag body 11. A top seal 16 and a bottom seal 17 are provided. However, in the case of the bag body 11 of FIGS. 1 to 5, since the bag mouth at the upper part of the bag body is in an unsealed state, the top seal 16 is indicated by a virtual line (two-dot chain line). Two typical examples of bagging and sealing a packaged object in the bag body 11 of the first embodiment are as follows. As an example, when the bottom side (lower side) of the bag body 11 is used as a filling port for an object to be packaged, both side seals 14 and 15 and a top seal 16 precede the bag body 11 in an unwrapped state. The bottom seal 17 is applied to the lower side portion of the bag 11 after the package is filled. As another example, when the bag mouth side (upper portion) of the bag body 11 is used as a filling port for the packaged item, the side seals 14 and 15 and the bottom seal 17 precede the bag body 11 in an unwrapped state. The top seal 16 is applied to the lower side of the bag body 11 after filling the package. As another example, in the case where the bag body 11 is left in an empty state and an article to be packaged is appropriately put into the bag body 11, both side seals 14 and 15 and a bottom seal 17 are applied to the bag body 11. However, the top seal 16 is not applied to the mouth side (upper side) of the bag body 11. The matters described here are common to all the embodiments, not just the first embodiment.

  As is apparent with reference to FIGS. 1 to 5, the two opening / closing tools 31 and 41 in the first embodiment are provided inside the bag body 11 as follows. That is, in the case of both the opening / closing tools 31 and 41 located on the bag mouth side in the bag body 11 and extending over both sides of the bag body 11, the male opening and closing members 32 and 42 and the female opening and closing members 35 and 45 are for the bag surface. The inner surface of the film 12 and the inner surface of the bag back film 13 are provided in two upper and lower stages. Thus, the pair of male opening / closing members 32 and the female opening / closing member 35 provided in the bag body 11, and the other pair of male opening / closing members 42 and the female opening / closing member 45 face each other so that they can be engaged with each other.

  In the first embodiment illustrated in FIGS. 1 to 5, both the opening / closing tools 31 and 41 provided in the bag body 11 are crushed and expanded when the bag body 11 is side-sealed (heat sealed). Yes. The full portions (full portions) in the side seals 14 and 15 can be said to be the initial form of a plurality of concave / convex shaping portions 18, 19, 20 and 21 which will be described later. Therefore, the uneven shape shaping portions 18, 19, 20, 21 which are bulge portions after shaping have the following shape structure.

  In the first embodiment of the synthetic resin packaging bag according to the present invention, there are concave and convex shaping portions 18 and 19 on both front and back surfaces of one side seal 14, and the concave and convex shaping portions on both front and back surfaces of the other side seal 15. There are 20.21. Each of the plurality (four) of the concave / convex shaping portions 18, 19, 20, and 21 has substantially the same configuration. In other words, each of the concave and convex shaping portions 18, 19, 20, 21 includes a plurality of protrusions and concave grooves, each having four protrusions 22a to 22d and three concave grooves 23a to 23c. doing. In the arrangement of the protrusions 22a to 22d and the grooves 23a to 23c, the protrusions and recesses are alternated, and the protrusions 22a → the grooves 23a → the protrusions 22b → The grooves are arranged in the order of the groove 23b → the protrusion 22c → the groove 23c → the protrusion 22d.

  The upper end surface 24 and the lower end surface 25 of each uneven | corrugated shaping part 18 * 19 * 20 * 21 in the above are formed in the flat inclined surface. In other words, this also means that a part of the uppermost protrusion 22a and a part of the lowermost protrusion 22d are formed by flat inclined surfaces. 2A, the upper end surface 24 is inclined upward from the front surface or the back surface of the side seal 15 toward the protrusion 22a, and the lower end surface 25 is inclined from the protrusion 22d to the side seal 15. Inclined with a downward slope toward the front or back surface of the.

  About the upper end surface 24 and the lower end surface 25 of each said uneven | corrugated shaping part 18,19,20,21, this is a concave inclined surface and a convex inclined surface which were illustrated by FIG.2 (B)-FIG.2 (E). Further, it may be formed of a perfect circular arc surface, an elliptical arc surface, or the like. Incidentally, the upper end surface 24 and the lower end surface 25 of FIG. 2 (B) are formed with concave inclined surfaces, the upper end surface 24 and the lower end surface 25 of FIG. 2 (C) are formed with convex inclined surfaces, The upper end surface 24 and the lower end surface 25 in FIG. 2 (D) are formed with perfect circular arc surfaces, and the upper end surface 24 and the lower end surface 25 in FIG. 2 (E) are formed with elliptical arc surfaces. .

  Each said uneven | corrugated shaping part 18,19,20,21 is formed by shaping the above-mentioned fullness part after a side seal. The shaping is performed by pressing the bulging portion at least when the bulging portion is in a softened state that can be shaped. That is, each uneven | corrugated shaping part 18,19,20,21 is performed by pressure-molding under a heating. The shaping jig 51 used in that case is illustrated in FIGS. Incidentally, the jig | tool 51 is for forming each uneven | corrugated shaping part 18, 19, 20, 21 of 1st embodiment illustrated by FIGS. 1-5. The configuration is as follows.

  As is apparent with reference to FIGS. 26A and 26B, the jig 51 has a shaping space. The shaping space includes a horizontal plate portion 52, inclined plate portions 53 and 54 connected to both ends of the horizontal plate portion 52, and a vertical plate portion 55 connected to the back side of the horizontal plate portion 52 and both inclined plate portions 53 and 54. And the shaping space is partitioned into a plurality of small spaces 57, 58, 59 and 60 by a plurality of partition plates 56. Further, an operation rod 61 for moving the jig 51 up and down is attached to the outer surface of the horizontal plate portion 52. When the above-mentioned bulging portion is heated and pressure-molded through the jig 51, the uneven shaping portions 18, 19, 20, 21 are formed as described above. More specifically, the concave grooves 23a to 23c are formed at the same time as the protrusions 22a to 22d are formed by the small spaces 57 to 60. In this case, for the formation of the concave-convex shaping portion, various known and well-known heating and pressing molding means including ultrasonic sealing means (ultrasonic heating sealing means) can be employed.

  The shape structure of the jig 51 illustrated in FIGS. 26 (A) and 26 (B) is made to correspond to the concave / convex shaping portions 18, 19, 20, and 21 as shown in FIGS. 2 (B) to 2 (E). When changed (modified / remodeled), the concave / convex shaping portions 18, 19, 20, and 21 as shown in FIGS. 2 (B) to 2 (E) can also be formed through the jig 51 of the changed mode. .

  As described above, the upper end surface 24 and the lower end surface 25 of each concave / convex shaping section 18, 19, 20, 21 are formed as a flat inclined surface, a concave inclined surface, a convex inclined surface, a perfect circular arc surface, or an elliptical surface. It may be formed by an arbitrary surface selected from arc surfaces. This is a matter that can be applied not only to the first embodiment of the synthetic resin-based packaging bag of the present invention but also to each of the second and subsequent embodiments described later. Therefore, this is a common technical matter that can be applied to all the embodiments of the synthetic resin packaging bag of the present invention. The widths of the protrusions 22a to 22d and the grooves 23a to 23c (vertical dimensions in the drawing) are not only the same as each other, but may be different from each other. In the present invention, such matters are common to all the embodiments. Incidentally, when the dimensions of the concave grooves 23a to 23c are increased, the amount of material pushed into the bag is increased accordingly, so that support layers 26a to 26c described later can be formed larger.

  The two opening / closing tools 31 and 41 in the first embodiment shown in FIGS. 1 to 5 include horizontally long male opening and closing members 32 and 42 and horizontally long female opening and closing members 35 and 45 that can be engaged with each other. Among these, the male opening and closing members 32 and 42 have sharply shaped male claws 33 and 43 that exhibit great resistance (function of engaging and engaging with female claws) in the return direction on the flat base portions 34 and 44. The female opening and closing members 35 and 45 are formed of a base material having a flat bifurcated female claws 36 and 46 having a male claw holding function (a function of engaging and engaging the male claws). It is integrally formed on 37 and 47. Both the opening / closing tools 31 and 41 are provided on the inner surface of the bag front film 12 and the inner surface of the bag back film 13 on the bag mouth (bag upper end) side in the bag body 11. In addition, both the opening / closing tools 31 and 41 over both sides of the bag body 11 are parallel to each other in two stages. In this case, the male and female open / close members 32, 35, 42, and 45 are integrally formed on the inner surfaces of the front and back films 12 and 13, or are adhered to the inner surfaces of the front and back films 12 and 13, respectively. is there.

  In both the opening / closing tools 31 and 41 in the first embodiment, the arrangement of both male and female opening / closing members 32, 35, 42, and 45 is reversed between the one opening / closing tool 31 and the other opening / closing tool 41. 4A, the male opening / closing member 32 of one opening / closing tool 31 is on the inner surface side of the bag back film 13, and the female opening / closing member 35 of the opening / closing tool 31 is used for the bag surface. The male opening / closing member 42 of the other opening / closing tool 41 is on the inner surface side of the bag front film 13 while the female opening / closing member 35 of the opening / closing tool 41 is the inner surface of the bag backing film 13, while the film 12 is on the inner surface side of the film 12. It is on the side. This matter regarding both the opening / closing tools 31 and 41 is only an example. Therefore, as another example, two male opening and closing members 32 and 42 are both provided on the inner surface of one film 12 (or 13), and two female opening and closing members 35 and 45 are both provided on the inner surface of the other film 13 (or 12). May be provided. Furthermore, each opening / closing member 32, 35, 42, 45, etc. may be on any inner surface of both films 12, 13 as long as a pair of male / female opening / closing members correspond to each other. .

  In the first embodiment shown in FIGS. 1 to 5, the concave / convex shaping portions 18, 19, 20, and 21 on the both side seals 14 and 15 of the bag body 11 are the predetermined ones of the side seals 14 and 15 as described above. The bulging part generated in the part is shaped, and the concave grooves 23a to 23c of the concavo-convex shaping parts 18, 19, 20, and 21 are caused by a volume reduction in which a part of the bulging part is recessed. is there. The volume reduction caused by the formation of the concave groove is displaced from the side seal inner edge side to the inner side of the bag body 11 along the length direction of the concave grooves 23a to 23c and the end of the opening / closing tool. The support layers 26a to 26c shown in FIG. That is, this is when the volume reduction amount is displaced from the inner edge side of the side seals 14 and 15 to the inner side of the bag body 11 along the length direction of the concave grooves 23a to 23c and the end portions of the opening / closing tools 31 and 41. The wall-shaped or block-shaped support layers 26a to 26c are brought into close contact with the end surfaces of the opening / closing members 32, 35, 42, and 45 in the bag body 11. Of these, one support layer 26a is in close contact with the outer surface of the male / female opening / closing members 32 and 35 from the upper side of the upper opening / closing tool 31, and the other support layer 26c is male from the lower side of the lower opening / closing tool 41. The female opening and closing members 42 and 45 are in close contact with the outer surface. Furthermore, the remaining one support layer 26b is between the two opening / closing tools 31 and 41, is in close contact with the outer surface of the male and female opening / closing members 32 and 35 from the lower side of the upper opening / closing tool 31 and It adheres to the outer surface of the male and female opening / closing members 42 and 45 from the portion. As a result, the airtightness of the portions where the support layers 26a to 26c are located (the portions including the inner edges of the side seals 14 and 15 and the both end portions of the opening / closing tools 31 and 41) is significantly improved. On the other hand, both ends of both the opening / closing tools 31 and 41 supported by the respective support layers 26a to 26c are also tightened by receiving the compression action when the respective concave and convex shaping portions 18, 19, 20, and 21 are formed. Therefore, both the opening / closing tools 31 and 41 themselves have high airtightness at both ends.

  In the case of the synthetic resin packaging bag of the present invention illustrated in FIGS. 1 to 5, the bag body 11 includes two opening / closing tools 31 and 41 inside the bag mouth side. Therefore, when taking out the article to be packaged from the bag body 11 or putting the article to be packaged in the bag body 11, the two opening / closing tools 31 and 41 are opened and closed as is obvious. That is, the opening / closing of the male / female opening / closing members 32/35/42/45 in both the opening / closing tools 31/41 is released or re-engaged. In particular, the present invention has a high airtightness of the entire opening and closing device including both ends of both opening and closing devices 31 and 41, and therefore, for packaging for packaging objects to be packaged such as liquid, liquid-containing material, and solid-liquid mixture. Suitable as a bag. As described above, such good results can be obtained when the concave / convex shaping portions 18 to 21 and the support layers 26a to 26c are seals for preventing leakage between the both ends of the opening / closing tool in the bag body 11 and the inner surface of the bag surface film. This is because it has a structure and a sealing structure for preventing leakage between both ends of the opening / closing tool in the bag body 11 and the inner surface of the bag back film.

  In the synthetic resin packaging bag of the present invention, the bag body 11 in each of the following embodiments also has a predetermined irregularity shaping part and a support layer, respectively, which form a leakage preventing seal structure. Even if the explanation about is omitted, the same good results can be obtained.

  Next, the synthetic resin packaging bag according to the present invention will be described with respect to the second embodiment illustrated in FIGS.

  In the case of the second embodiment illustrated in FIGS. 6 and 7, the bag body 11 and the opening / closing tools 31 and 41 are the same as those of the first embodiment, but provided on both side seals 14 and 15 of the bag body 11. The shape of each uneven | corrugated shaping part 18 * 19 * 20 * 21 which differs is that of said 1st embodiment. That is, in the case of the second embodiment, the number of concave grooves in each of the concave / convex shaping portions 18, 19, 20, and 21 is smaller than the previous example. Specifically, it is as follows.

  As is apparent with reference to FIGS. 6 and 7, each of the concave and convex shaping portions 18, 19, 20, and 21 has two concave grooves 22b and 22c, respectively. This means that the number of concave grooves is one less than that of the previous example in terms of one concave / convex shaping portion. In this case, one concave groove 22b is between both the opening / closing tools 31 and 41, and corresponds to both the lower side of the opening / closing tool 31 and the upper side of the opening / closing tool 41, and the other concave groove 22c is below the lower opening / closing tool 41. It corresponds to the side. Of course, the above-described support layer also exists in the second embodiment. As for each support layer of the second embodiment, referring to FIG. 4B, it is almost the same as the two support layers 26b and 26c in the first embodiment.

  In the second embodiment, the number of protrusions of each of the concave / convex shaping portions 18, 19, 20, and 21 is four as in the previous example. That is, the four protrusions 22a to 22d exist in each of the concavo-convex shaping portions 18, 19, 20, and 21 shown in FIGS. However, since the number of the concave grooves is reduced by one as compared with the previous example, the protrusions 22a and the protrusions 22b are directly connected.

  The other items in the second embodiment illustrated in FIGS. 6 and 7 are substantially the same as those in the first embodiment or are equivalent to those in the first embodiment. The description is omitted by reference. Of course, in the case of the second embodiment, all matters described in the first embodiment can be implemented within the scope of technical compatibility.

  Next, the synthetic resin packaging bag according to the present invention will be described with reference to the third embodiment illustrated in FIGS.

  The third embodiment illustrated in FIGS. 8 and 9 also has a smaller number of concave grooves in each of the uneven shaping parts 18, 19, 20, and 21 than in the previous example. Specifically, it is as follows.

  As is apparent with reference to FIGS. 8 and 9, each of the concave and convex shaping portions 18, 19, 20, and 21 has two concave grooves 22 a and 22 b, which are also recessed as compared with the previous example. There are few grooves. In this case, one concave groove 22a corresponds to the upper side of the upper opening / closing tool 31, and the other concave groove 22b is between both the opening / closing tools 31 and 41, and corresponds to both the lower side of the opening / closing tool 31 and the upper side of the opening / closing tool 41. It is what you are doing. As for each support layer of the third embodiment, referring to FIG. 4B, it is almost the same as the two support layers 26a and 26b in the first embodiment.

  In the third embodiment, the number of protrusions of each of the concave / convex shaping sections 18, 19, 20, and 21 is four as in the previous example. That is, the four protrusions 22a to 22d exist in each of the uneven shape shaping portions 18, 19, 20, and 21 shown in FIGS. However, since the number of the concave grooves is reduced by one as compared with the previous example, the protrusions 22c and the protrusions 22d are directly connected.

  The other items in the third embodiment illustrated in FIGS. 8 and 9 are substantially the same as those in the first embodiment or are equivalent to those in the first embodiment. The description is omitted by reference. Of course, in the case of the third embodiment, all the matters described in the first embodiment can be implemented within the scope of technical compatibility.

  Next, the synthetic resin packaging bag according to the present invention will be described with respect to the fourth embodiment illustrated in FIGS.

  In the fourth embodiment illustrated in FIGS. 10 and 11, the number of concave grooves in each of the concave and convex shaping portions 18, 19, 20, and 21 is also smaller than in the previous example. Specifically, it is as follows.

  As is apparent with reference to FIGS. 10 and 11, each of the concave and convex shaping portions 18, 19, 20, and 21 has one (single) concave groove 22 b, which is also compared with that of the previous example. And the number of grooves is small. The concave groove 22b in this case is located between the opening / closing tools 31 and 41 and corresponds to both the lower side of the opening / closing tool 31 and the upper side of the opening / closing tool 41. In this embodiment, the groove width of the concave groove 22b (dimension in the vertical direction in FIG. 10) is larger than the groove width of the previous example, and the shape of the concave groove 22b when viewed from the front or back of the bag is The side seals 14 and 15 have a tapered shape that forms a transverse parabola from the outer edge toward the inner edge. The concave grooves of the concave / convex shaping portions 18, 19, 20, and 21 in this embodiment are only the concave grooves 22b. However, since the groove width of the concave groove 22b is large, even this single concave groove 22b is comparable to a plurality of the concave grooves of the previous example. Regarding the support layer of the fourth embodiment, if FIG. 4 (B) is used instead, it is the same as the support layer 26b in the first embodiment, but this is along the length direction of the opening / closing tools 31 and 41. The dimensions of the support layer are larger than those of the above examples.

  In the fourth embodiment, the number of protrusions of each concave / convex shaping section 18, 19, 20, 21 is four as in the previous example. That is, the four protrusions 22a to 22d exist in each of the uneven shape shaping portions 18, 19, 20, and 21 shown in FIGS. However, since the number of the concave grooves is reduced by two compared to the previous example, the protrusions 22a and 22b, and the protrusions 22c and 22d are directly connected to each other.

  Other matters in the fourth embodiment illustrated in FIGS. 10 and 11 are substantially the same as those in the first embodiment, or are equivalent to those in the first embodiment. The description is omitted by reference. Of course, in the case of the fourth embodiment, all the matters described in the first embodiment can be implemented within the scope of technical compatibility.

  Next, regarding the synthetic resin packaging bag according to the present invention, the fifth embodiment illustrated in FIGS. 12 and 13, the sixth embodiment illustrated in FIGS. 14 and 15, and FIGS. 16 and 17. The seventh embodiment illustrated in FIG. 18 and the eighth embodiment illustrated in FIGS. 18 and 19 will be described.

  In the case of the fifth embodiment illustrated in FIGS. 12 and 13, the concave and convex shaping portions 18 and 19 are formed only on both side seals 14 and 15 (side seal surfaces) on the surface side of the bag body 11. Both side seals 14 and 15 (side seal back surface) on the back surface side of the bag body without a portion are flat flat surfaces. The two uneven shaping parts 18 and 19 in the fifth embodiment are the same as those adopted in the first embodiment (see FIGS. 1 and 2), and each has four protrusions 22a to 22d and three depressions. Grooves 23a to 23c. In the case of an embodiment in which such a type of irregularity shaping part (two) is provided on the side seal, the irregularity shaping is performed only on both side seals 14 and 15 (side seal back) on the back side of the bag body 11 instead of the side seal surface. The parts 20 and 21 may be formed.

  Also in the sixth embodiment illustrated in FIGS. 14 and 15, the uneven shaping portions 18 and 19 are formed only on both side seals 14 and 15 (side seal surface) on the surface side of the bag body 11, and the uneven shaping is performed. Both side seals 14 and 15 (side seal back) on the back side of the bag 11 having no portion are flat flat surfaces. The both concave and convex shaping portions 18 and 19 in the sixth embodiment are the same as those adopted in the second embodiment (see FIGS. 6 and 7), and each has four protrusions 22a to 22d and two concaves. It has grooves 23b and 23c. Even in an example in which only two uneven projections of this type are provided on the side seals, the irregular projections 20 are provided only on the side seals 14 and 15 (the back of the side seals) on the back side of the bag body 11 instead of the side seal surface. -21 may be formed.

  Also in the seventh embodiment illustrated in FIGS. 16 and 17, the concave and convex shaping portions 18 and 19 are formed only on both side seals 14 and 15 (side seal surfaces) on the surface side of the bag body 11, Both side seals 14 and 15 (side seal back) on the back side of the bag body 11 without a flat surface are flat. Since both uneven | corrugated shaping parts 18 and 19 in 7th embodiment are the same aspects as what was employ | adopted by said 2nd embodiment (refer FIG. 8, FIG. 9), four protrusions 22a-22d and 2 respectively. It has two concave grooves 23b and 23c. In the case of an example in which only two of this type of concave / convex shaping portion is provided on the side seal, the concave / convex shaping portion 20 is provided only on both side seals 14 and 15 (back side of the side seal) on the back side of the bag body 11 instead of the side seal surface. -21 may be formed.

  In the eighth embodiment illustrated in FIGS. 18 and 19, the uneven shaping portions 18 and 19 are formed only on both side seals 14 and 15 (side seal surfaces) on the surface side of the bag body 11. Both side seals 14 and 15 (side seal back) on the back side of the bag body 11 without a flat surface are flat. Since both uneven | corrugated shaping parts 18 and 19 in 8th embodiment are the same aspects as what was employ | adopted by said 2nd embodiment (refer FIG. 10, FIG. 11), respectively, it has four protrusions 22a-22d and one. And two concave grooves 23b. Even in an example in which only two of this type of concave / convex shaping portion are provided on the side seal, the concave / convex shaping portion 20... Is provided only on both side seals 14 and 15 (back side of the side seal) on the back side of the bag body 11 instead of the side seal surface. 21 may be formed.

  Other matters in the fifth to eighth embodiments illustrated in FIGS. 12 to 19 are substantially the same as those in the first embodiment, or are equivalent to those in the first embodiment. Therefore, description is abbreviate | omitted by referring the previous example. Of course, in the case of the fifth embodiment to the eighth embodiment, all items described in the first embodiment can be implemented within the scope of technical compatibility.

  Next, a ninth embodiment illustrated in FIGS. 20 and 21 will be described with respect to the synthetic resin packaging bag according to the present invention.

  In the ninth embodiment illustrated in FIGS. 20 and 21, as in the eighth embodiment, the uneven shaping portions 18 and 19 (or 20) are formed only on the side seal surface (or the back surface of the side seal) of the bag body 11. 21) is formed, and the back surface of the side seal (or the front surface of the side seal) of the bag body 11 without the uneven shaping portion is a flat flat surface. Both uneven | corrugated shaping parts 18 * 19 (or 20 * 21) in this embodiment also each have the four protrusions 22a-22d and the one ditch | groove 23b. With respect to the four protrusions 22a to 22d in the both concave and convex shaping portions 18 and 19, the latter two protrusions are in a relative relationship between the two protrusions 22a and 22d having an inclined shape and the two protrusions 22b and 22c having a square cross section. 22b and 22c protrude higher than both the former 22a and 22d, and one concave groove 23b is made of a narrow width like that of the first embodiment, for example.

  The difference between the ninth embodiment illustrated in FIGS. 20 and 21 and the other embodiments is that at the intersection of both side seals 14 and 15 intersecting both ends of both opening and closing tools 31 and 41, A part of the inner edge of the side seals 14 and 15 is recessed toward the outer edge, and the inner edges of the side seals 14 and 15 are concave inner edges 14x and 15x. Both ends of the opening / closing tools 31 and 41 interposed in the concave inner edge portions 14x and 15x are more reliably prevented from being deformed during the side seal process.

  For the concave inner edge portions 14x and 15x described in the ninth embodiment of FIGS. 20 and 21, by using the following sealing jig 71 shown in FIGS. It can be formed simultaneously with the side seal process.

  The sealing jig 71 illustrated in FIGS. 26C and 26D is also referred to as a heat sealing seal bar. The sealing jig 71 shown in FIGS. 26C and 26D, which is merely an example, has a bar shape with a square cross section, and the pressing surface (the lower surface in the drawing) is a flat surface. More specifically, this is a structure in which a concave portion 73 corresponding to the concave inner edge portions 14x and 15x is formed in a predetermined portion of the seal bar main body 72. An operating rod 74 for moving the seal bar main body 72 up and down is attached to the outer surface of the seal bar main body 72 opposite to the recess 73. When the concave inner edge portions 14x and 15x are formed simultaneously with the side seal processing by the jig 71, the seal bar main body in which the both side edges of the front and back films 12 and 13 in a superposed state are held at a predetermined high temperature. It is sufficient to heat and press at 72, whereby both side seals 14 and 15 are formed, and at the same time, both concave inner edges 14x and 15x are formed. Of course, such a side seal process is performed prior to the formation of the concave and convex portions 18 and 19.

  For the concave inner edge portions 14x and 15x described in the ninth embodiment of FIGS. 20 and 21, the items described in FIGS. 26C and 26D are adopted, so that the first embodiment described above is employed. It can also be adopted in the eighth embodiment and the tenth embodiment described later. That is, also in the first to eighth embodiments and the tenth embodiment, the concave inner edge portions 14x and 15x are formed on both side seals 14 and 15 of the bag body 11.

  A tenth embodiment illustrated in FIGS. 22 and 23 will be described as a synthetic resin packaging bag according to the present invention other than the above.

  Both the concave and convex shaping portions 18 and 19 (or 20 and 21) in the tenth embodiment illustrated in FIGS. 22 and 23 are each provided with four protrusions 22a to 22d and one as in the ninth embodiment. It has a concave groove 23b. However, in this embodiment, the dimension in the width direction of the both concave and convex shaping portions 18 and 19 is smaller than the width of the side seals 14 and 15.

  Making the widths of the concave / convex shaping portions 18, 19, 20, 21 smaller than the side seal width as in the tenth embodiment can also be adopted in each of the above embodiments and the following embodiments.

  The other items in the tenth embodiment illustrated in FIGS. 22 and 23 are substantially the same as those in the first embodiment, or are equivalent to those in the first embodiment. The description is omitted by reference. Of course, in the case of the tenth embodiment, all items described in the first embodiment can be implemented within the scope of technical compatibility.

  The eleventh embodiment illustrated in FIGS. 24 and 25 will be described as a synthetic resin packaging bag according to the present invention other than the above.

  In the eleventh embodiment illustrated in FIGS. 24 and 25, the bag body 11 includes an opening / closing tool 31 inside the bag mouth side. That is, the bag body 11 of each embodiment includes a plurality of (two) opening / closing tools 31 and 41 inside the bag, whereas the bag body 11 of the eleventh embodiment is a single (one). An opening / closing tool 31 is provided inside the bag. Both ends of the opening / closing tool 31 in this embodiment also intersect with the side seals 14 and 15 on both sides of the bag body 11. Both ends of the opening / closing tool interposed between the side seals 14 and 15 become the above-described bulging portion when the side sealing process is performed. In the case of the eleventh embodiment, the bulging portion is utilized. Are formed. As will be described below, it is substantially the same as or similar to the case of each of the above embodiments.

  In the case of the eleventh embodiment illustrated in FIGS. 24 and 25, the both side seals 14 and 15 of the bag body 11 are combined with the ones on the front and the back of the side seals 14 and 15, A total of four uneven shaping portions 18 to 21 are formed. The plurality of concave / convex shaping portions 18 to 21 are formed by shaping the above-described bulging portions generated after the side seal processing, as in the previous embodiments, for example, the first embodiment. Furthermore, each uneven | corrugated shaping part 18-21 has three protrusion 22a * 22b (or 22c) * 22d and two ditch | groove 23a * 23b (or 23c). In each uneven | corrugated shaping part 18-21 in this case, the two recessed grooves 23a * 23b (or 23c) along the length direction of the opening / closing tool 31 are in the site | part corresponding to the upper side and lower side of both ends of the opening / closing tool. is there. Although not shown, the bag body 11 of the eleventh embodiment also has wall-like or block-like support layers 26a and 26c that accompany the formation of both concave grooves 23a and 23b (or 23c). Referring to FIG. 25, one of the support layers 26a is in close contact with the outer surface of the male / female opening / closing member 32/35 from the upper side of the opening / closing tool 31, and the other one of the supports. The layer 26b is in close contact with the outer surfaces of the male and female opening / closing members 32 and 35 from the lower side of the opening / closing tool 31. Of course, both the support layers 26a and 26b also increase the airtightness of both ends of the opening / closing tool 31 as described in the first embodiment.

  As for the above-described synthetic resin packaging bag (eleventh embodiment), that is, the bag body 11 provided with only one opening / closing tool 31, various types as described in the above embodiments. There are embodiments. One of them is that the concave and convex portions 18 to 21 on both side seals 14 and 15 have only one concave groove 23a or one upper concave groove 23b. The other is that the concave / convex shaping portions 18/19 or the concave / convex shaping portions 20/21 are formed on either the front side or the back side of the side seals 14/15.

  The other matters in the eleventh embodiment illustrated in FIGS. 24 and 25 are substantially the same as those in the first embodiment, or are equivalent to those in the first embodiment. The description is omitted by referring to. Of course, in the case of the eleventh embodiment, all matters described in the first embodiment can be implemented within the scope of technical compatibility.

  As an embodiment (not shown) of the synthetic resin packaging bag according to the present invention, three or more opening / closing tools 31, 41... May be provided inside the bag body 11 on the bag mouth side. In this case, the opening / closing tool is provided in the upper and lower stages in the bag body 11 in a state of being parallel to each other as in the above-described embodiment, for example, the first embodiment. Also in this embodiment in which a plurality of opening / closing tools are provided in the bag body 11 in three or more stages, the concave and convex shaping portions 18, 19... Corresponding to both ends of each opening / closing tool are provided on both side seals 14 of the bag body 11. -It is formed in 15. Further, the minimum number of the concave grooves of the concave / convex shaping portions 18, 19... On both side seals 14, 15 of this embodiment is [1]. Further, the maximum number of the concave grooves is [α + 1], where α is the number of opening / closing tools (the number of upper and lower stages). Regarding the embodiment in which the opening / closing tool is provided in three or more stages in the bag body 11, all the matters described in the above-described embodiments can be adopted within the scope of technical compatibility.

  As described above, the number of concave grooves of the concave / convex shaping portions 18, 19... Formed on both side seals 14, 15 of the bag 11 is as described above, with the smallest number being [1] and the largest number being [α + 1]. Of course, since the sealing effect and the like increase in proportion to the number of grooves, the larger the number, the better, and the best when the number of grooves is the largest. However, in the following embodiments, it is desirable to do as described herein.

[When there is one (one step) opening / closing tool in the bag 11]
In the example in which only one opening / closing tool is provided in the bag body 11 and only one groove is provided in one concave / convex shaping portion in the side seal, for the single groove, It is desirable to be provided corresponding to the lower side of the opening / closing tool end. The desirable reason is as follows. In general, in a case where a liquid packaging object such as a liquid, a liquid containing material, or a liquid mixture is packaged, the lower side of the opening / closing tool comes into contact with the liquid packaging object. In such a case, if there is a sealing failure on the lower side of the opening / closing end of the opening / closing tool, liquid may invade into the opening / closing tool in the closed state (gap between the male opening / closing member and the female opening / closing member) by capillary action. Become. On the other hand, in the case where the concave groove is provided corresponding to the lower side of the opening / closing end of the opening / closing tool, the lower side of the opening / closing end of the opening / closing tool is strongly bonded or the lower side of the opening / closing end of the opening / closing tool. Since the sealing structure is dense and high in strength, liquid intrusion into the opening / closing tool can be prevented.
[When there are multiple (multiple steps) opening / closing tools in the bag 11]
In the case of the example in which the opening and closing tool is provided in a plurality of stages in the bag body 11 and only one groove is provided in one uneven shaping portion in the side seal, the single groove is For the same reason as described above, it is desirable to be provided corresponding to the lower side of the opening / closing tool end. The single groove in this case is also preferably provided between the lower side of the upper opening / closing tool and the upper side of the lower opening / closing tool in both upper and lower adjacent opening / closing tools. The reason is that the effect of forming one concave groove extends to the upper and lower two opening / closing tools.

  In all embodiments of the synthetic resin packaging bag according to the present invention, the following matters are also adopted.

  In FIG. 2 (A), the dimension over the front-rear direction of the bag body 11 (the dimension from the bag surface to the bag back surface) is W. This W is the dimension in the longitudinal direction of the bag when the male and female open / close members 32, 35, 42, 45 of the open / close tool 31, 41 are in an occluded state. This also corresponds to the dimension in the front-rear direction of the opening / closing tools 31 and 41 in the occlusal state. Further, in FIG. 2A, the height of the concave / convex shaping portions 18 to 21 is set to H. When H is the center line of the bag when the bag body 11 is viewed from the side (the center line of the side seal 14 or the center line of the side seal 15), the protrusion 22a or the protrusion 22b extends from the center line O. This corresponds to the distance up to. Therefore, for the height H of each of the concave / convex shaping portions 18 to 21 in each of the above embodiments, this is [W ≧ H]. When the height H of each uneven | corrugated shaping part 18-21 is set to W or less, each uneven | corrugated shaping part 18-21 in both the side seals 14 and 15 does not protrude excessively.

  On the other hand, in the case of [W <H], each of the concave and convex shaping portions 18 to 21 is higher than the occluded opening / closing tools 31 and 41, so that it is difficult to perform an operation of bundling a large number of unused bags in an aligned state. Moreover, each uneven | corrugated shaping part 18-21 with the concave grooves 23a-23c becomes a fingertip guide which slides the fingertip applied here to the opening-and-closing tool edge part side as mentioned above. In the case of [W <H], the operability of the opening / closing tools 31 and 41 also has the following difficulty. That is because the uneven shaper 18 to 21 is high when shifting from the first operation in which each uneven shaper 18 to 21 is picked with two fingers to the second operation in which two fingers are slid along the opening / closing tool. Therefore, the probability that the end portions of the opening / closing tools 31 and 41 can be firmly pressed down becomes low, and the smoothness of the closing operation tends to be impaired.

  In all the embodiments of the present invention, each of the corners in the concavo-convex structure of each of the concavo-convex shaping portions 18 to 21, each corner at the boundary between the upper end of the protrusion 22 a and both side seals 14, and the protrusion 22 d One or more of the corners at the boundary between the lower end and the side seals 14 may be formed in a rounded chamfered shape. Therefore, there are examples in which some of these corners are chamfered, and examples in which all of them are chamfered.

  In the present invention described above, the above-described concave / convex shaping portions (18, 19, 20, 21) are formed on both sides of both side seals 14, 15 or only on one side of both side seals 14, 15. Whether or not to do so may be determined arbitrarily. Among these, in the case where the uneven shape forming portions are formed on both sides of the both side seals 14 and 15, the uneven shape forming portions are dispersed on the front and back surfaces of the both side seals 14 and 15, so the size of the uneven shape forming portion per surface is large. Can be suppressed. This is particularly convenient when a large opening / closing tool (31/41) is employed. On the other hand, when the concave / convex shaping portion is formed only on one side of the side seals 14 and 15, it is convenient when a small opening / closing tool (31/41) is employed. This is because the fingertip guide function and the marker function that can be seen when the concave-convex shaping part becomes too small can be prevented from decreasing.

  As is apparent with reference to the bag 11, the synthetic resin packaging bag shown in each embodiment of the present invention includes one or more opening / closing tools including a single case and a plurality of cases in the bag. It is what it has. The description so far relating to the present invention also discloses a method for forming an uneven shaping portion in such a synthetic resin packaging bag. As is clear from the above description, the bulging portions of the side seals 14 and 15 of the bag body 11 after the side seal treatment are subjected to a heat and pressure shaping process, so that protrusions and grooves are formed. It is formed as a concavo-convex shaping part with a mixture of. As an example of the shaping, the jig 51 illustrated in FIGS. 26A and 26B, that is, the horizontal plate portion 52, the inclined plate portions 53 and 54 connected to both ends of the horizontal plate portion 52, and the horizontal plate portion. 52 and a shaping space surrounded by a vertical plate portion 55 connected to the back side of both inclined plate portions 53 and 54, and the shaping space includes a plurality of partition plates 56 and a plurality of small spaces 57, 58 and 59. -The one divided into 60 is used.

  The synthetic resin packaging bag according to the present invention is provided with a concavo-convex shaping portion that is useful and useful for the side seal. By providing this irregularity shaping part, high degree of airtightness in the closed state of the switchgear ・ Repairing the end of the switchgear and ensuring the soundness of the opening / closing function by the repair ・ Improving the operability of the switchgear Explicit effect of the side seal ・ Improving the appearance of the side seal ・ Eliminating the need for additional materials to solve the problem ・ Number of steps for the end side processing of the additional side seal -Since it can satisfy the cost reduction of high quality packaging bags, it has sufficient industrial applicability.

DESCRIPTION OF SYMBOLS 11 Bag body 12 Bag surface film 13 Bag back film 14 Side seal 14x Concave inner edge 15 Side seal 15x Concave inner edge 16 Top seal 17 Bottom seal 18 Concavity and convexity shaping part 19 Concavity and convexity shaping part 21 Concavity and convexity shaping part 21 Concavity and convexity shaping part 22a Protrusion 22b Protrusion 22c Protrusion 22d Protrusion 23a Concave groove 23b Concave groove 23c Concave groove 24 Upper end surface 25 Lower end surface 26a Support layer 26b Support layer 26c Support layer 31 Opening / closing tool 32 Male opening / closing member 33 Male claw 34 Base part 35 Female opening / closing member 36 Female nail 37 Base part 41 Opening / closing tool 42 Male opening / closing member 43 Male nail 44 Base part 45 Female opening / closing member 46 Female nail 47 Base part

Claims (10)

A bag body for packaging and an opening / closing tool for opening and closing the bag mouth, of which the opening / closing tool is composed of a horizontally long male opening / closing member and a horizontally long female opening / closing member,
A male opening and closing member and a female opening and closing member of the opening / closing tool can be engaged with the inner surface of the bag front film and the inner surface of the bag backing film on both sides of the bag body. Are provided facing each other, and
Side seals are applied to both sides of the bag, and
Both ends of the opening / closing tool comprising the male opening / closing member and the female opening / closing member intersect with the side seals on both sides of the bag body and are interposed on both side seals, and both sides by the both ends of the opening / closing tool interposed. In a synthetic resin packaging bag that assumes that the seal is full,
The bulging portions on both side seals of the bag body are formed as a concave / convex shaping portion in which convexities and concave grooves are mixed, and of these convexities and concave grooves, the concave portions along the length direction of the opening / closing tool are formed. The inward end of the groove extends laterally inward of the bag from the side edge of both side seals, and the bulge after formation of the concavo-convex shaping part is smaller in volume than the bulge before formation of the concavo-convex shaping part. And
In the opening / closing end region that is inside the bag body and is in contact with the inner edge side of both side seals, a support layer that is in close contact with the opening / closing end surface and supports the opening / closing end is provided. Formed of a material part accompanying the volume reduction of the part, and
The concave / convex shaping portion and the support layer form a seal structure for preventing leakage between both ends of the opening / closing tool in the bag and the inner surface of the bag front film, and between the both ends of the opening / closing tool in the bag and the inner surface of the bag backing film. It has a seal structure for preventing leakage, and
A synthetic resin-based packaging bag, wherein the airtightness between both ends of the opening / closing tool in the closed state and the inner surface of the bag body is maintained through the concave-convex shaping portion and the support layer.   The horizontal opening / closing tool comprising a horizontally long male opening / closing member and a horizontally long female opening / closing member that can be engaged with each other, wherein the single opening / closing tool is provided at a position on the bag mouth side in the bag body. Synthetic plastic packaging bags.   A laterally long opening and closing device comprising a horizontally long male opening and closing member and a horizontally long female opening and closing member that can be engaged with each other, wherein a plurality of the opening and closing devices are provided in parallel to each other at a bag mouth side portion in the bag body. 1. A synthetic resin-based packaging bag described in 1.   Any one of the side seals selected from the side seals on both sides of the bag body, and an uneven shaping portion is formed on either one of the front and back surfaces of the side seal on the one side. The synthetic resin packaging bag according to any one of claims 1 to 3.   4. The concave / convex shaping portion is formed on the side seal surface of the one side portion of the bag body, and the concave / convex shaping portion is formed on the back surface of the side seal of the other side portion of the bag body. Synthetic resin packaging bags.   The synthetic resin-based packaging bag according to any one of claims 1 to 3, wherein a concavo-convex shaping portion is formed on one of the front and back surfaces of the side seals on both sides of the bag body.   The synthetic resin-based packaging bag according to any one of claims 1 to 3, wherein concave and convex shaping portions are formed on both front and back surfaces of the side seals on both sides of the bag body.   The synthetic resin-based packaging bag according to any one of claims 1 to 7, wherein each concave-convex shaping portion has a single concave groove.   The synthetic resin packaging bag according to any one of claims 1 to 7, wherein each of the concave / convex shaping portions has a plurality of concave grooves.   The synthetic resin-based packaging bag according to any one of claims 5 to 7, wherein a concave / convex shaping portion having a single concave groove and a concave / convex shaping portion having a plurality of concave grooves are mixed.

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