JP6775942B2 - Synthetic resin packaging bag with opening and closing - Google Patents

Description

The present invention relates to a synthetic resin-based packaging bag having an opening / closing tool inside the bag .

As a well-known synthetic resin packaging bag, there is a bag equipped with an opening / closing tool called a chuck, a fastener, a zipper, an occlusion tool, etc. in the opening. In the case of this synthetic resin packaging bag with an opening / closing tool, it is possible to prevent leakage of the packaged object from the bag, entry of impurities into the bag, deterioration of the packaged object, etc. by simply closing the bag mouth with the opening / closing tool. Because it can be used, it is widely used in various fields.

On the other hand, synthetic resin packaging bags with opening / closing tools also have unique drawbacks that occur during bag making. When the bag front film and the bag back film, which are the constituent elements of the bag body, are overlapped and both side seals are performed, both ends of the male opening / closing member and the female opening / closing member provided on the inner surfaces of both films are overlapped. Is deformed by the side seal treatment. That is, the deformation at the time of side sealing causes the formation of micropores and microgaps at both ends of the opening / closing tool and its surroundings, which impairs the airtightness and liquidtightness in the vicinity of the opening / closing tool end. Is done. (Hereinafter, poor airtightness and poor liquidtightness are simply referred to as poor airtightness).

Many synthetic resin packaging bags with opening / closing tools have been developed so far. The synthetic resin packaging bag with an opening / closing tool disclosed in Patent Documents 1 to 5 below also falls under such a developed product. Hereinafter, the synthetic resin packaging bag with an opening / closing tool according to this conventional technique will be examined from the viewpoint of airtightness.

[About Patent Document 1]
<01> In the case of the bag body with an occlusal tool (opening / closing tool) disclosed in Patent Document 1, an adhesive portion is provided on the upper side or the lower side of the occlusal tool end portion.
<02> Whether the adhesive portion provided in the vicinity of the end of the occlusal tool in Patent Document 1 is effective in facilitating the closing of the occlusal tool and ensuring the closing of the occlusal tool. As you can see, the deformation of the occlusal edge that occurs during the side seal deteriorates the quality of the bag. That is, regarding this deformation, not only is the male and female nails not properly fitted (occlusal) at the end of the occlusal tool, but also the male and female nails are poorly adhered (gap) at the end of the occlusal tool. In other words, it also causes poor airtightness.
[Patent Document 2]
<03> Patent Document 2 (see FIG. 1) is located at both ends of the opening / closing tool end (zipper end) in a bag body whose component is a laminated body (packaging material sheet) containing an aluminum foil. By setting the width of the point seal portion to be wider than the side seal width (vertical seal portion width), cracking of the aluminum foil during bag making is prevented.
<04> However, in Patent Document 2, when both side seals of both laminated bodies (packaging material sheets) for the front and back of the bag overlapped with each other, the zipper ends provided on the inner surfaces of both laminated bodies are formed. Deformation occurs at both ends of the zipper and its surroundings due to the deformation at the time of side sealing, so that the airtightness and liquidtightness in the vicinity of the zipper end are impaired.
[About Patent Document 3]
<05> In Patent Document 3, the opening / closing tool (chuck) of the bag body disclosed in FIG. 9 is one in which the chuck end portion is fully processed or the chuck end portion side is provided with a three-way seal. More specifically, the chuck end portion interposed in the side seal region is finished by crushing by heating and pressurizing, and spot seal portions are provided on three sides around the chuck end portion.
<06> The internal space of the chuck end of Patent Document 3 has disappeared due to the above-mentioned fulfillment processing. At the end of the chuck when the chuck is closed, it seems that the fluid leakage from the fully deformed portion is prevented by the fluid passage blocking function. Since the chuck end portion of Patent Document 3 is also provided with spot seal portions on three sides around the fully deformed portion of the chuck end portion, is it possible to prevent fluid leakage near the chuck end portion? I can see it.
<07> However, there are still some points to be improved in the seal structure of Patent Document 3. That is, the fully deformed chuck end and the spot seals on the three sides around the chuck are separated from each other with a gap. In the case of such a seal structure, when there is a fine gap at the capillary level between the end of the fully deformed chuck and the three-way spot seal portion due to a sealing defect or the like, fluid may leak from the gap. Therefore, from the viewpoint of the sealing structure of the region including the chuck end portion and the peripheral portion thereof, the one described in the document cannot exhibit a sealing function sufficient to satisfy a high degree of reliability.
[Patent Document 4]
<08> The technical content disclosed in Patent Document 4 relates to the improvement of the vertical seal bar (side seal bar). That is, in the case of the vertical seal bar found in the same document, by forming a recess in a part of the seal surface, the crushing width of the opening / closing tool end (chuck end) at the time of side sealing is reduced. Therefore, the effect of crushing the end of the chuck is alleviated accordingly.
However, even when it is used for the vertical seal bar of Patent Document 4, it does not mean that the chuck end is not crushed at all, but the chuck end is crushed at a size of about half the width of the side seal. Such crushing of the chuck end is an unavoidable phenomenon when manufacturing a bag with a chuck. That is, when a chuck is provided over the entire inner surface width of the bag front film or the bag back film and side seals are applied to both side portions of both films, the chuck end portion is always crushed.
<10> Therefore, even if the vertical seal bar disclosed in Patent Document 4 is used, the chuck end portion is crushed. Due to the above-mentioned defect caused by the collapse of the chuck end, the airtightness of the chuck end and its surroundings is impaired.
[Patent Document 5]
<11> In the case of the bag with chuck disclosed in Patent Document 5, two parallel chucks are provided inside the bag. This is applied including the first point seal applied to the plastic film portion adjacent to both chucks and the ends of both chucks so as to overlap the first point seal while avoiding the two chucks. It is equipped with a second point seal. Further, regarding the contents of this literature technique, the first point seal is applied parallel to and close to the chuck end portion, but the first point seal and the chuck end portion are separated from each other. In particular, there is a considerable gap between the base of the female claw of the chuck and the first point seal. On the other hand, the second point seal is provided so as to overlap the first point seal, and more specifically, to overlap the three first point seals in an orthogonal state. As a result, an E-shaped point seal is formed at the end of the chuck.
<12> In Patent Document 5, when the second point seal is applied after the first point seal, the sealing pressure at that time greatly acts on the chuck end portion, so that the chuck end portion is crushed. That is, the end of the chuck is greatly deformed, and it becomes difficult to properly fit the male and female claws at the end of the chuck. This deformation also causes a gap between the male and female nails at the end of the chuck. In addition, there may be a gap between the base of the female claw of the chuck and the first point seal. Obviously, the presence of such two gaps reduces the reliability of airtightness at the end of the chuck as compared to the case without these gaps.
<13> In the case of the bag of Patent Document 5, two horizontally parallel first point seals and one vertically oriented second point seal are on the side seal sides on both sides of the bag, and these two point seals are combined. The seal shape is U-shaped. This accurately positions both ends of the second point seal so that it intersects the inner ends of the two first point seals at right angles and spans these two ends during the second point seal performed after the first point seal. Since they must be matched, the latter second point sealing process becomes difficult.

Japanese Unexamined Patent Publication No. 53-111876 Jikkenhei 04-041846 Japanese Unexamined Patent Publication No. 2001-232698 Jikkai Sho 63-011305 Japanese Unexamined Patent Publication No. 07-246670

The present invention has been made to solve the above problems, and an object of the present invention is to ensure high airtightness and pressure resistance of the bag in the closed state of the opening / closing tool, to secure a sound opening / closing function, and to operate the opening / closing tool. Synthetic resin packaging bag with opening and closing, and synthetic resin with opening and closing that can satisfy the improvement, the strength of opening and closing, the alleviation of the difficulty of sealing processing, the improvement of product yield, and the cost reduction of high quality products. It is an object of the present invention to provide a rational sealing method for a packaging bag and a processing jig for an opening / closing device terminal having a simple structure.

The synthetic resin-based packaging bag with an opening / closing tool according to the present invention is characterized by the technical contents described in the following paragraphs 1 to 4 as a means for solving a problem for achieving the intended object. ..
<Section 1>
It is equipped with a bag for packaging and a horizontally long opening / closing tool for opening / closing the bag mouth of the bag body, and the opening / closing tool is a pair of horizontally long male opening / closing tools that can be freely engaged with each other. It consists of a member and a horizontally long female opening / closing member, and
On the inner surface of the bag front film and the inner surface of the bag back film, which are the parts on the bag mouth side in the bag body, the opening / closing tools are provided so as to occlude and face each other over both sides of the bag body. Being and
Side seals are provided on both sides of the bag body, and
Both ends of the opening / closing tool engage the male opening / closing member and the female opening / closing member so as to intersect the side seals on both sides of the bag body, and the side seal intervening portion of the opening / closing tool and the side seal are interposed. Is integrated with
In a synthetic resin packaging bag with an opening / closing tool
The horizontally long opening / closing tool extending between both side seals of the bag body provides a fluid flow blocking portion for blocking fluid flow inside and outside the bag at a portion on the end side of the opening / closing tool, and an opening function as the opening / closing tool. Having a restrained open restraint portion and an opening / closing function holding portion that holds an opening / closing function as an opening / closing tool, and
Regarding the fluid flow blocking portion, the opening restraining portion, and the opening / closing function holding portion, the fluid flow blocking portion is continuously located at the inner end portion of the both side seal intervening portions and is located inside the both side seals. In addition, the opening restraint portion is continuously located at the inner end portion of both fluid flow blocking portions and is located inside the fluid flow blocking portion, and the opening / closing function holding portion is both open. It is continuous with the inner end of the restraint and extends between the inner ends, and
The upper left corner portion, the upper right corner portion, the lower left corner portion, and the lower right corner portion formed by the fluid flow blocking portion and the open restraint portion arranged in a straight line and the side seal intersecting the two linear portions are described above. A part of the bag front film and a part of the bag back film are relatively adhered to form a seal amplification portion, and
The seal amplification portion in the upper left corner and the seal amplification portion in the upper right corner form a rectangle along the vertical direction, and the width of the bag mouth of the bag is narrowed by both seal amplification portions. In addition, the seal amplification section at the lower left corner and the seal amplification section at the lower right corner form a downwardly sharp pentagon having inclined sides inclined toward the left side seal and the right side seal, respectively. At the same time, the width of the non-seal region on the upper side of the bag body is gradually narrowed toward the bag mouth side of the bag body by both seal amplification parts, and
The lowermost end of the inclined side of the seal amplification portion of the lower left corner reaches the inner edge of the left side seal and is in contact with the inner edge of the left side seal, and is inclined at the seal amplification portion of the lower right corner. The bottom edge of the side reaches the inner edge of the right side seal and is in contact with the inner edge of the right side seal, and
Each of the seal amplification portions is continuous with respect to the three portions of the side seal, the fluid flow blocking portion, and the open restraint portion without any gap, and
Regarding the bag body in the closed state of the opening / closing tool in which the male opening / closing member and the female opening / closing member are meshed with each other, the fluid flow blocking portion and the seal amplification portion are the end portion of the opening / closing tool and its peripheral portion. A synthetic resin-based packaging bag with an opening / closing tool, which is characterized by blocking the flow of fluid.
<Section 2>
For synthetic resin-based packaging with an opening / closing tool according to item 1, wherein a reinforced seal portion is formed at the boundary between the fluid flow blocking portion and the seal amplification portion and the boundary between the open restraint portion and the seal amplification portion. bag.
<Section 3>
The synthetic resin-based packaging bag with an opening / closing tool according to item 1 or 2, wherein the surface of the fluid flow blocking portion is inclined downward toward the side seal side.
<Section 4>
Regarding the surface of the open restraint portion and the surface of the fluid flow blocking portion, the first term or the first item or the first item in which the surface of the open restraint portion is high and the surface of the fluid flow blocking portion is low. Synthetic resin packaging bag with opening / closing tool described in item 2.

The sealing method for the synthetic resin-based packaging bag according to the present invention, the synthetic resin-based packaging bag with an opening / closing tool according to the present invention, and the processing jig for the opening / closing tool terminal according to the present invention are described in <21> to <36> below. There is a clear effect in the description of.
[High airtightness of synthetic resin packaging bags]
<21> Inside the opening (bag mouth) side of the bag body of the present invention, an opening / closing tool composed of a male opening / closing member and a female opening / closing member that can mesh with each other is provided over the entire width of the bag. Furthermore, the ends of the opening / closing tools (male opening / closing member / female opening / closing member) that are in mesh with each other are interposed in the side seals on both sides of the bag body, and the side seal intervening portion of the opening / closing tool and the above side are interposed. It is integrated with the seal. By the way, the side seal interposition of the opening / closing tool is completely crushed and integrated with the side seal.
<22> Generally, for the above-mentioned opening / closing tool whose end is crushed at the side seal portion, the original length of the opening / closing tool (equal to the total width of the bag) is set to Lw, and the length of the end crushing of the opening / closing tool ( When (equal to the side seal width) is Ln and the apparent effective length of the opening / closing tool is L, the effective length L is as shown in the following equation (1).
L = Lw-Ln ……… (1)
<23> On the other hand, with regard to the above-mentioned opening / closing tool, the effective end of the opening / closing tool is affected by deformation or the like due to the collapse of the end portion. Therefore, the effective effective length RL of the opening / closing tool is shorter than the apparent effective length L. When the amount of reduction of the effective length due to the influence of the end crush is Lx, the effective effective length RL of the opening / closing tool is as shown in the following equation (2).
RL = Lw-Ln-Lx = L-Lx ……… (2)
<24> Regarding the above-mentioned opening / closing tool whose effective end is deformed due to the influence of the end crushing, the end of the male opening / closing member and the end of the female opening / closing member do not mesh tightly, which causes fluid leakage. There will be a gap. If this is left as it is, the airtightness of the bag body will be impaired. That is, airtightness failure (liquid tightness failure) occurs, such as the fluid inside the bag leaking out of the bag or the outside air outside the bag entering the bag.
<25> As such a measure, the synthetic resin-based packaging bag according to the present invention includes a fluid flow blocking section and a seal amplification section. Of these, the fluid flow blocking portion is inside the side seal and is continuous with the opening / closing function holding portion end of the opening / closing tool, so that the fluid flow at the opening / closing function holding portion end is blocked. On the other hand, the seal amplification part is also inside the side seal and airtightly seals around the fluid flow blocking part. That is, the end portion of the opening / closing tool and its surroundings are sealed at an ultra-high degree so that there are no capillaries with two different types of sealing configurations. Therefore, in a bag with the opening / closing tool closed in which the male opening / closing member and the female opening / closing member are meshed with each other, fluid leakage does not occur at the end of the opening / closing tool or its surroundings. It is.
<26> In the case of a synthetic resin-based packaging bag according to the present invention in which a reinforced seal portion is formed at the boundary between the fluid flow blocking portion and the seal amplification portion, a seal including this reinforced seal portion is also provided. Since there are three types of configurations, the required sealing performance can be guaranteed more reliably.
[Pressure resistance of synthetic resin packaging bags]
<27> In the opening restraint portion on the end side of the opening / closing tool, the ends of both male and female opening / closing members in the closed state are not opened. That is, in this portion, although the shape as both male and female opening / closing members is maintained and the opening / closing function remains, it cannot be opened because the end portions of the opening / closing tools are integrated. In the case of a packaging bag equipped with an opening / closing tool having such an opening restraint portion, it is difficult to open the opening / closing tool by that amount. Therefore, for example, even if the internal pressure of the bag increases due to an unexpected situation, this type of internal pressure It is unlikely that the opening / closing tool will be unintentionally opened due to the rise in the number of items. Therefore, the pressure resistance of the packaging bag in the closed state is high.
[Sound opening / closing function of opening / closing tools in synthetic resin packaging bags]
<28> Since the synthetic resin-based packaging bag according to the present invention is provided with a fluid flow blocking portion and a seal amplification portion, the effective length of the opening / closing tool is reduced by that amount and the opening width of the bag body is also increased. It will decrease.
<29> On the other hand, the opening restraint part, the fluid flow blocking part, and the seal amplification part are difficult to open because they become a resistance factor when trying to open the opening / closing function holding part end of the opening / closing tool. To. In other words, this always keeps the terminal side of the opening / closing function holding portion of the opening / closing tool in the closed state. Furthermore, regarding the opening / closing device terminal, it is desirable to keep the opening / closing device closed rather than opening the ends of both male and female opening / closing members, which makes it easier to close the opening / closing device after opening and opens / closes. It also suppresses the unreasonable opening of the ingredients. Therefore, a sound opening / closing function can be ensured as a synthetic resin packaging bag with an opening / closing tool.
[Improved operability of opening / closing tools in synthetic resin packaging bags]
<30> In the synthetic resin-based packaging bag according to the present invention, the opening restraint part, the fluid flow blocking part, and the seal amplification part do not become an obstructive factor when opening the opening / closing tool, and the opening / closing tool after opening is not a factor. Make it easy to close as described above. Therefore, in the case of a synthetic resin packaging bag with an opening / closing tool, the operability of the opening / closing tool is improved.
[Improved strength of opening / closing tools in synthetic resin packaging bags]
<31> As is well known, in this type of packaging bag, the opening / closing tool is loaded when the bag mouth is opened or closed. In particular, a shocking load acts on the end of the opening / closing tool when the opening / closing tool is quickly opened with a large force. When such a situation is frequently repeated or continued, this causes fatigue failure of the opening and closing.
<32> On the other hand, when the open restraint part, the fluid flow blocking part, and the seal amplification part are enclosed so as to reinforce the end of the opening / closing tool and are connected to and integrated with the end like the packaging bag of the present invention. , The strength of the end of the opening and closing tool is significantly improved. By the way, even when an unreasonable opening force acts on the end of the opening / closing tool, the opening restraint part, the fluid flow blocking part, the seal amplification part, etc. cooperate with the opening / closing tool end to resist this and suppress the opening. Therefore, it is less likely that the end of the opening / closing tool will be damaged.
[Cost reduction of synthetic resin packaging bags (high quality products)]
<33> In the case of the synthetic resin-based packaging bag according to the present invention, the bag is of high quality in terms of high airtightness, sound opening / closing function of the opening / closing tool, improved operability of the opening / closing tool, and improved strength of the opening / closing tool. I can say. In the case of the synthetic resin-based packaging bag, since this high quality is ensured without newly consuming special constituent materials, the cost reduction of high quality products is satisfied. In addition, since the product yield is improved as described below, this point also contributes to cost reduction.
[Reducing the difficulty of processing synthetic resin packaging bags and improving product yield]
<34> The synthetic resin-based packaging bag according to the present invention is a technically fully-ripened conventional technique except for the opening / closing tool end configuration such as the opening restraint portion, the fluid flow blocking portion, and the seal amplification portion and the peripheral configuration of the end portion. It can be produced by almost the same means as. Therefore, in this respect, there is no particular processing difficulty. On the other hand, the open restraint part, the fluid flow blocking part, and the seal amplification part also require a jig for processing, but for example, by using heat treatment and pressure treatment together in the line production method, this can be easily done. It can be manufactured stably. Therefore, the difficulty of processing when manufacturing the synthetic resin-based packaging bag can be alleviated, and the product yield can be improved.
[Rationality of sealing method]
<35> The sealing method of the present invention is mainly carried out by the end sealing step of the opening / closing tool, the end peripheral sealing step, and the side sealing step. This can be done in a process that requires very little treatment of the end of the opening / closing tool for improving airtightness and treatment of the periphery of the end. Furthermore, since it is an existing process such as a side sealing process, the substantial increase in the main process for improving the airtightness is only two processes, the end sealing process and the end peripheral sealing process. Further, these two steps can be performed simultaneously with a single jig. Therefore, in the sealing method of the present invention, when the synthetic resin-based packaging bag with an opening / closing tool is to be highly airtight at the time of preparation, the required sealing process can be performed extremely rationally.
[Simple configuration of processing jig for switch terminals]
<36> The processing jig for an opening / closing tool terminal according to the present invention has a groove-shaped shaping recess for forming an opening restraint portion and a fluid flow blocking portion, and a flat pressing surface portion for forming a seal amplification portion. It is a main structure, that is, a simple structure in which the two parts are arranged in the same plane adjacent to each other without a gap. Moreover, when the processing jig for the opening / closing tool terminal is used, the required fluid flow blocking portion and the seal are simply applied to the predetermined parts of the bag body components (the laminated bag front film and the bag back film). The amplification part can be stably formed. Therefore, in the case of the processing jig for the switch terminal according to the present invention, it is useful and useful in carrying out the sealing method of the present invention.

It is a front view which showed one Embodiment of the synthetic resin-based packaging bag which concerns on this invention. It is a front enlarged view of the main part of the synthetic resin-based packaging bag exemplified in FIG. It is sectional drawing of each main part of the synthetic resin-based packaging bag exemplified in FIG. Of these, FIG. 3 (I) is a sectional view taken along line I-I of FIG. 2, FIG. 3 (II) is a sectional view taken along line II-II of FIG. 2, and FIG. 3 (III) is III of FIG. FIG. 3 (IV) is a sectional view taken along line IV-IV of FIG. 2, and FIG. 3 (V) is a sectional view taken along line II of FIG. 2 in another embodiment. .. It is a front view which showed the other embodiment of the synthetic resin-based packaging bag which concerns on this invention. FIG. 4 is an enlarged front view of a main part of the synthetic resin-based packaging bag illustrated in FIG. It is sectional drawing of each main part of the synthetic resin-based packaging bag exemplified in FIG. Of these, FIG. 6 (I) is a sectional view taken along line I-I of FIG. 4, FIG. 6 (II) is a sectional view taken along line II-II of FIG. 4, and FIG. 6 (III) is III of FIG. A cross-sectional view taken along line -III, FIG. 6 (IV) is a cross-sectional view taken along line IV-IV of FIG. It is explanatory drawing which illustrated various embodiments about the processing jig for the opening / closing device terminal which concerns on this invention. Of these, FIG. 7 (I) is a view of an example of the processing jig as viewed from the pressing surface side, FIG. 7 (II) is a left side view of FIG. 7 (I), and FIG. 7 (III) is the same (I). ), FIG. 7 (IV) is a plan view of FIG. 7 (I), FIG. 7 (V) is a sectional view taken along line V-V of FIG. 7 (I), and FIG. 7 (I). VI) is a view of another example of the processing jig as viewed from the pressing surface side, FIG. 7 (VII) is a left side view of the figure (VI), and FIG. 7 (VIII) is a view of VIII-VIII of the figure (VI). Sectional view along the line, FIG. 7 (IX) is a plan view of FIG. 7 (VI), FIG. 7 (X) is a sectional view of FIG. 7 (VI) along line XX, and FIG. 7 (XII) is the same figure. FIG. 7 (XIII) is a cross-sectional view taken along the line III-III of (XI), and FIG. 7 (XIII) is a view of an example of the processing jig other than the above as viewed from the pressing surface side thereof. It is explanatory drawing which illustrates various embodiments of the side seal bar with a processing jig in this invention. Of these, FIG. 8 (I) is a front view of a main part showing a first example of a side seal bar with a processing jig, and FIG. 8 (II) is a main part showing a second example of a side seal bar with a processing jig. The front view of the part, FIG. 8 (III) is a front view of the main part showing the third example of the side seal bar with the processing jig, and FIG. 8 (IV) is the main part showing the fourth example of the side seal bar with the processing jig. It is a front view of a part. It is the perspective view which substantially showed the several kinds of reinforced seal jigs in this invention, and the perspective view which showed the side seal bar schematicly. Of these, FIGS. 9 (I), (II) and (III) relate to each reinforced seal jig, and FIG. 9 (IV) relates to a side seal bar. The outline of the row-row bag making method and the column-row bag making method is outlined for the bag manufacturing method. In the case of FIG. 10, FIG. 10 (I) is an explanatory view of the row-row bag making method, and FIG. 10 (II) is an explanatory view of the column-row bag making method. It is explanatory drawing which substantially showed one Embodiment of the sealing method which concerns on this invention. It is explanatory drawing which substantially showed the other embodiment of the sealing method which concerns on this invention.

Regarding the synthetic resin-based packaging bag according to the present invention, first, the basic bag structure, the main bag component members, the materials of the bag component material, and the like will be described.

As the synthetic resin-based packaging bag according to the present invention, those exemplified in all the illustrated embodiments and those exemplified in all the following embodiments have the bag body 11 for the bag front film 12 and the bag back. It is mainly composed of the film 13 and is formed in a bag shape. Alternatively, there is also a case in which the bag body 11 is formed in a bag shape mainly by the bag front film 12, 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-based, of course, the bag body 11 is also synthetic resin-based.

The synthetic resin-based packaging bag according to the present invention is a synthetic resin-based bag as is self-evident, but the term "synthetic resin-based" as used in the present invention is a single synthetic resin or a heterogeneous synthetic resin. It is a superordinate conceptual term including a combination of the above, a composite material in which a synthetic resin and a non-synthetic resin are composited, and the like.

When the synthetic resin-based packaging bag according to the present invention is made of only synthetic resin, the synthetic resin is mainly a thermoplastic resin, but a thermosetting resin may be adopted in some cases. More specifically, any synthetic resin listed in a to n below is selected and adopted, and the synthetic resin is a film for the bag front film 12 and the bag back film 13 of the bag body 11. It has been transformed. Regarding polyethylene, polypropylene, etc. in the following, these can be collectively referred to as polyolefin.
a. Ionomer resin b. Various types of polyethylene (high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, etc.)
c. Polychlorinated film d. Polyvinylidene chloride film e. Polychlorinated 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-based packaging bag according to the present invention is made of a combination of different synthetic resins, for example, it is made of a combination of two or more synthetic resins selected from the above a to n.

When the synthetic resin-based packaging bag (bag body 11) 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 laminated on the inner surface of a non-synthetic resin film (sheet). .. Regarding this, laminated products made of synthetic resin film and metal foil (eg, aluminum foil), laminated products made of synthetic resin film and woven cloth, laminated products made of synthetic resin film and non-woven fabric, synthetic resin film and net. Examples include laminated products made of synthetic resin film and paper. As the synthetic resin in the laminated product, those listed in a to n above are appropriately selected and adopted. In addition, as this kind of composite material in the present invention, a metallizing-processed metallic / non-metallic vapor-deposited synthetic resin or ultrafine metal-based / non-metallic material (even titanium oxide, silica glass, etc.) Synthetic resins made of new nanotechnology-based materials mixed with and adhered to the above can also be used, and depending on the contents, they can be combined with both of the above films 12 and 13.

In the synthetic resin-based packaging bag according to the present invention, opening / closing tools 31 and 41 for opening / closing the bag mouth are provided inside the bag mouth side of the bag body 11. More specifically, the opening / closing tool 31 is composed of a horizontally long male opening / closing member 32 that can bite each other and a horizontally long female opening / closing member 35, and the opening / closing tool 41 also has a horizontally long male opening / closing member that can freely bite each other. It is composed of a member 42 and a horizontally long female opening / closing member 45. Furthermore, in one example, the opening / closing tools 31 and 41 are integrally formed on the inner surfaces of both the front and back films 12 and 13. In another example, the opening / closing tools 31 and 41 are tape-shaped and adhered 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 referred to as chucks, fasteners, zippers, etc., while they are also referred to as occlusal tools. When the synthetic resin, which is the material of the opening / closing tools 31 and 41, is integrally formed on the inner surfaces of both the front and back films 12 and 13, it is made of the same material or the same material as both films 12 and 13. .. Further, the opening / closing tools 31 and 41 when they are adhered to the inner surfaces of both the front and back films 12 and 13 are made of the same material or the same material as both films 12 and 13, or both films 12 and 13. A synthetic resin having an affinity for 13 is adopted. Specific synthetic resins in that 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 from among them.

Next, the synthetic resin-based packaging bag with an opening / closing tool according to the present invention will be described with reference to one embodiment illustrated in FIGS. 1 to 3.

Regarding the synthetic resin-based packaging bag according to the present invention, in FIGS. 1 to 3 in which one embodiment thereof is shown, in the bag body 11, the bag front film 12 and the bag back film 13 are superposed on each other. Moreover, the predetermined peripheral edges of both films 12 and 13 are sealed to form a bag shape. Therefore, the bag body 11 has a plurality of sealing portions. More specifically, side seals 14 and 15 are provided on both side portions of the bag body 11 via heat sealing means, and heat sealing means are also provided on the upper and lower portions of the bag body 11. A top seal 16 and a bottom seal 17 are provided through the seal. However, in the case of the bag body 11 of FIGS. 1 to 3, since the bag mouth at the upper part of the bag body is in an unsealed state, the top seal 16 is shown by a virtual line (dashed line). Two typical examples of packing and sealing the object to be packaged in the bag body 11 of this embodiment are as follows. As an example, in the case of a type in which the bottom side (lower side) of the bag body 11 is the filling port of the object to be packaged, the bag body 11 in the state before packaging has both side seals 14 and 15 and a top seal 16. Is already formed, so after filling the packaged object, the bottom seal 17 is applied to the lower portion of the bag body 11. As another example, when the bag mouth side (upper side) of the bag body 11 is used as the filling port of the object to be packaged, the bag body 11 in the state before packaging has both side seals 14 and 15 and the bottom seal 17. Since it has already been formed, the top seal 16 is applied to the lower portion of the bag 11 after filling the packaged object. As an example other than this, when the bag body 11 is left empty and the object to be packaged is appropriately put in the bag body 11, both side seals 14 and 15 and the bottom seal 17 are applied to the bag body 11. However, the top seal 16 is not provided on the mouth side (upper side) of the bag body 11. Such explanations are common to all embodiments.

As is clear with reference to FIGS. 1 to 3, the two horizontally long opening / closing tools 31 and 41 in the bag body 11 of this embodiment are provided inside the bag body 11 as follows. That is, the male opening / closing members 32.42 and the female opening / closing members 35 and 45 of both the opening / closing tools 31 and 41 extending on both sides of the bag body 11 at the bag mouth side portion in the bag body 11 are the bag surface film 12. It is provided on the inner surface and the inner surface of the bag back film 13 in a two-stage manner. Thus, one male and female opening / closing member 32/35 and the other male / female opening / closing member 42/45 provided in the bag 11 face each other in an occlusal manner. In this case, the side seal intervening portions 311L, 311R, 411L, and 411R at both ends of both the opening / closing tools 31 and 41 are crushed at the time of side sealing of both ends of the bag body by, for example, heat sealing means, and both side seals 14・ It is integrated with 15. Furthermore, the side seal intervening portions 311L, 411L, 311R, and 411R are inclined downward toward the outer edges of the side seals 14 and 15. In particular, the edge region Ed of each side seal intervening portion 311L, 411L, 311R, 411R is extremely thin as shown in FIG. 3 (A), so that this can be distinguished from the side seals 14 and 15. It shows an indescribable unity.

In the bag body 11 of FIGS. 1 to 3, both opening / closing tools 31 and 41 extending between the side seals 14 and 15 are provided with the side seal intervening portions 311L, 311R, 411L and 411R, as well as the fluid flow blocking portions 312L, 312R and 412L. It also has 412R, open restraint portions 313L, 313R, 413L, 413R, and opening / closing function holding portions 314, 414. These are as described below.

Each of the fluid flow blocking portions 312L, 312R, 412L, and 412R blocks the flow of fluid inside and outside the bag body 11 at the portion on the end side of the opening / closing tool. As a typical example, each fluid flow blocking portion 312L / 312R / 412L / 412R has a block shape formed by shaping (molding) the ends of both opening / closing tools 31 and 41 in a softened state or a molten state. It is a thing. As illustrated in FIG. 3 (II), this does not correspond to a shape structure that penetrates the inside such as a through hole, a through gap, and a through space. Therefore, it can be said that this is a fluid impervious structure at the ends of both opening / closing tools. Therefore, the fluid or the like flowing into each fluid flow blocking portion 312L / 312R / 412L / 412R does not flow through the respective portions 312L / 312R / 412L / 412R. Each fluid flow blocking portion 312L / 312R / 412L / 412R has a relative relationship with both side seals 14/15 and each side seal interposing portion 311L / 311R / 411L / 411R, and each side seal interposing portion 311L / 311R / 411L. It is continuously located at the inner end of the 411R and is located inside the side seals 14 and 15, respectively.

Each of the opening restraint portions 313L, 313R, 413L, and 413R is a portion where the opening is restrained on the end side of both the opening / closing tools 31 and 41. For this portion, both male and female opening / closing members 32, 35, 42, and 45 in the closed state (occluded state) cannot be opened. This is because the ends of both the opening / closing tools 31 and 41 and / or their peripheral portions are adhered (welded) as shown in FIG. 3C. In the case of such an adhesive structure, as is obvious, the bite of both male and female opening / closing members 32, 35, 42, and 45 in the closed state cannot be removed. The open restraint portions 313L, 313R, 413L, and 413R are also formed by shaping (molding) the ends of both opening / closing tools 31 and 41 in a softened or melted state. By the way, it can be said that each of these parts is often formed at the same time as each fluid flow blocking part 312L / 312R / 412L / 412R. Further, each open restraint portion 313L, 313R, 413L, 413R is continuously located at the inner end of each fluid flow blocking portion 312L, 312R, 412L, 412R, and is located inside each of these portions 312L, 312R, 412L, 412R, respectively. There is.

The opening / closing function holding portions 314 and 414 of both opening / closing tools 31 and 41 are portions that hold the opening / closing function as the opening / closing tools, as illustrated in FIG. 3 (IV). This is because the side seal intervening parts 311L, 411L, 311R, 411R and the fluid flow blocking parts 312L, 312R, 412L, 412R have lost the initial opening and closing function, whereas the opening and closing function holding parts 314 and 414 are male and female. It has an opening / closing function for engaging and disengaging both opening / closing members 32, 35, 42, and 45. As is clear from FIG. 1, for example, each opening / closing function holding unit 314/414 has the other parts 311L / 411L / 311R / 411R / 312L / 312R / 412L / 412R / 313L / 313R / 413L. The middle part excluding 413R corresponds to this.

The above-mentioned side seal intervening portions 311L / 311R / 411L / 411R, fluid flow blocking portions 312L / 312R / 412L / 412R, open restraint portions 313L / 313R / 413L / 413R, opening / closing function holding portions 314 and 414, etc. are lateral in FIG. The dimension in the direction (horizontal direction) is referred to as a length, and in the above-mentioned side seals 14 and 15, the dimension in the lateral direction (horizontal direction) in FIG. 1 is referred to as a width. When the length and width of each part in this case are indicated by symbols, the length of each side seal intervening part is [311L = 411L = 311R = 411R], and the length of each fluid flow blocking part is [312L = 312R = 412L = 412R], the width of each side seal is [14 = 15]. Further, the width of each side seal and the length of each side seal intervening portion have an equation relationship [14 = 15 = 311L = 411L = 311R = 411R].

When the dimensional relationship of each part of the bag is as described above, the width of the side seal 15 is set to H1 in FIG. 3, and the total length of [fluid flow blocking part 312R + open restraint part 313R] is set to FIG. When H2 is set and the total length of [H1 + H2] is set to H3 in FIG. 3, it is desirable to set H3 within the range of the following equation (3) in relation to H1.
[3.0 × H1] ≧ [H3] ≧ [1.5 × H1] ………… (3)

The reason for setting the above H3 within the range of the above equation (3) is as follows. First, when H3 is set to less than [1.5 × H1], it becomes difficult to create two parts, a fluid flow blocking part 312R and an open restraint part 313R, in this short area, and in particular, fluid flow. When the blocking portion 312R is pressurized and crushed under heating, cracks or scratches called "thermal cracks" are likely to occur in this small region. On the other hand, when H3 is set to exceed [3.0 × H1], this causes an uneconomical manufacturing method that requires a large jig and a large heating means, and the processed portion becomes too large to be processed, which makes processing difficult. The degree also increases. About this H3, around [2.0 × H1] is more desirable.

The bag 11 illustrated in FIGS. 1 to 3 further includes both side seals 14 and 15, each fluid flow blocking portion 312L, 312R, 412L, 412R, and each open restraint portion 313L, 313R, 413L, 413R. Seal amplification sections 315L, 315R, 415L, and 415R are formed at the four corners of the eggplant. Regarding this, for example, a part of the bag front film 12 and a part of the bag back film 13 are relatively adhered by heat sealing means, so that each seal amplification portion 315L / 315R / 415L / 415R is formed. To.

What is important for each seal amplification unit 315L, 315R, 415L, and 415R is that the side seal, the fluid flow blocking unit, and the open restraint portion are continuous without any gap. Therefore, each seal amplification unit 315L / 315R / 415L / 415R has the following aspects. In the case of the seal amplification unit 315L, the upper edge of the fluid flow blocking unit 312L and the open restraint unit 313L and the inner edge of the side seal 14 are continuous without a gap. In the case of the seal amplification unit 315R, the upper edge of the fluid flow blocking unit 312R and the open restraint unit 313R and the inner edge of the side seal 15 are continuous without a gap. In the case of the seal amplification portion 415L, the lower edge of the fluid flow blocking portion 412L and the open restraint portion 413L and the inner edge of the side seal 14 are continuous without a gap. Further, in the case of the seal amplification unit 415R, the lower edge of the fluid flow blocking unit 412R and the open restraint unit 413R and the inner edge of the side seal 15 are continuous without a gap.

As is clear from FIGS. 1 and 2, each seal amplification unit 315L, 315R, 415L, and 415R has a polygonal shape when viewed from the front surface of the bag and the back surface of the bag. Specifically, the seal amplification units 315L and 315R have a quadrangular shape (rectangle), and the seal amplification units 415L and 415R have a pentagonal shape (a downwardly sharp pentagon having an inclined side). However, this exemplary shape is only an example. Therefore, as long as the condition that each seal amplification unit 315L, 315R, 415L, and 415R is continuous without gaps in the predetermined three parts is satisfied, it may be an arc shape, a combination shape of an arc shape and a polygon shape, or the like. It may be a deformed shape of. Therefore, the inner edges of the seal amplification units 315L, 315R, 415L, and 415R may have only a straight line shape, a curved line shape, or a mixed shape of a straight line and a curved line.

Each of the seal amplification units 315L, 315R, 415L, and 415R described above may be provided with two or more of them. In that case, with reference to FIG. 1, the seal amplification units 315L and 315R in the upper left and upper right corners are included, or the seal amplification units 315L and 415R in the lower left and lower right corners are included. It takes that.

The surfaces of the fluid flow blocking portions 312L, 312R, 412L, and 412R described above refer to surfaces that can be seen from the front surface (FIG. 1) and the back surface of the bag body 11. That is, the upper surface side and the lower surface side in FIG. 3 (I) are referred to as the surfaces of the fluid flow blocking portions 312L, 312R, 412L, and 412R. The surfaces of the fluid flow blocking portions 312L, 312R, 412L, and 412R are inclined downward toward the side seals 14 and 15 as is clear with reference to FIG. 3 (I). Further, regarding the surfaces of the fluid flow blocking portions 312L, 312R, 412L, and 412R, these are connected to the surfaces of the side seal intervening portions 311L, 311R, 411L, and 411R at the same gradient and are connected to the side seals 14 and 15 sides. It is sloping downhill. On the other hand, the surfaces of the open restraint portions 313L, 313R, 413L, and 413R are not provided with a gradient like the fluid flow blocking portions 312L, 312R, 412L, and 412R.

As an embodiment different from that of FIG. 3 (I), there is also an example as shown in FIG. 3 (V). In the example of FIG. 3 (V), with respect to the surface of each open restraint portion 313L, 313R, 413L, 413R and the surface of each fluid flow blocking portion 312L, 312R, 412L, 412R, each open restraint portion 313L, 313R, 413L, 413R. A relative step S is set in which the surface of each fluid flow blocking portion 312L, 312R, 412L, 412R is high and the surface of each fluid flow blocking portion is low. In addition, in the example of FIG. 3 (V), the above-mentioned gradients are provided on the surfaces of the side seal intervening portions 311L, 311R, 411L, and 411R.

In the bag 11 illustrated in FIGS. 1 to 3, the boundary between each fluid flow blocking section 312L / 312R / 412L / 412R and each seal amplification section 315L / 315R / 415L / 415R or each open restraint section is also provided. Reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR are formed at the boundary between the 313L, 313R, 413L, and 413R and the seal amplification portions 315L, 315R, 415L, and 415R. The reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR are formed by pressurizing each of the boundary portions heated to an appropriate temperature with a pressurizing jig. Each of the reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR formed in this way becomes an extremely dense film layer, and no minute voids or pores are observed even in microscopic observation, so that fluid flow flows. It exerts a high degree of function as a layer to prevent. Therefore, in the case of the bag body 11 having each reinforced seal portion 51UL, 51CL, 51DL, 51UR, 51CR, 51DR on the end side of both opening / closing tools 31 and 41, the expected airtightness is further high. Become.

The number of the above-mentioned reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR is preferably two or more. In that case, the two or more are one or more selected from the reinforced seal portions 51UL, 51CL, and 51DL on the left side and any one selected from the reinforced seal portions 51UR, 51CR, and 51DR on the right side. That is all.

The packaging bag of the present invention exemplified in FIGS. 1 to 3 is a bag body 11 provided with two opening / closing tools 31 and 41, and the ends of both opening / closing tools 31 and 41 and the periphery of the ends are respectively. The fluid flow blocking section 312L / 312R / 412L / 412R and the seal amplification section 315L / 315R / 415L / 415R are the main components and are tightly sealed. Therefore, in the case of the bag body 11 when both the opening / closing tools 31 and 41 are closed, the fluid inside the bag leaks out of the bag from the vicinity of the ends of both opening / closing tools 31 and 41, and the fluid outside the bag. However, the situation that the fluid enters the bag from the vicinity of the ends of both the opening / closing tools 31 and 41 does not occur at all, and it exhibits a high degree of sealing effect as a packaging bag that requires airtightness. Of course, when the bag body 11 described above also includes the reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR at the predetermined portion on the end side of the opening / closing tool, the required sealing effect becomes higher.

Next, the synthetic resin-based packaging bag according to the present invention will be described below with reference to the embodiments illustrated in FIGS. 4 to 6.

In the case of the synthetic resin-based packaging bag illustrated in FIGS. 4 to 6, only one horizontally long opening / closing tool is provided inside the bag mouth side of the bag body 11. That is, in the opening / closing tool 31 that extends to both sides of the bag body 11 at the portion on the bag mouth side in the bag body 11, the male opening / closing member 32 and the female opening / closing member 35 are the inner surface of the bag front film 12 and the bag back film 13. It is provided on the inner surface of. In the opening / closing tool 31 provided in the bag body 11 in this way, the end portion of the opening / closing tool and the periphery of the end portion are airtightly sealed in the same manner as in the previous example. Therefore, the synthetic resin-based packaging bags (bags 11 with the opening / closing tool 31) illustrated in FIGS. 4 to 6 also have side seal intervening portions 311L / 311R, fluid flow blocking portions 312L / 312R, and open restraint portions 313L / 313R. , The seal amplification unit 315L / 315R / 415L / 415R and the reinforced seal unit 51UL / 51DL / 51UR / 51DR are provided.

Regarding the surfaces of the open restraint portions 313L / 313R and the fluid flow blocking portions 312L / 312R of the bag body 11 illustrated in FIGS. 4 to 6, the surfaces of the open restraint portions 313L / 313R are also high, and each fluid flow In some cases, a step is set in which the surface of the blocking portions 312L and 312R is lowered. That is, also in the bag body 11 of FIGS. 4 to 6, the step S described above may be provided in the manner described in FIG. 3 (V).

The packaging bags illustrated in FIGS. 4 to 6 are substantially the same as the precedents of FIGS. 1 to 3 except that they are provided with only one opening / closing tool. Therefore, all the explanations can be adopted for the packaging bags illustrated in FIGS. 4 to 6, but those matters will be omitted by referring to the items described in the preceding examples (FIGS. 1 to 3).

Also in the case of the packaging bag illustrated in FIGS. 4 to 6, the fluid flow blocking section 312L / 312R, the open restraint section 313L / 313R, the seal amplification section 315L / 315R / 415L / 415R, and the reinforced seal section 51UL / 51DL / 51UR -It is equipped with 51DR. Therefore, the bag body 11 of FIGS. 4 to 6 when the opening / closing tool 31 is in the closed state is airtight with almost no leakage of the fluid inside the bag or invasion of the fluid outside the bag into the bag, as in the previous example. As a packaging bag that requires sex, it exhibits a high degree of sealing effect.

As for the packaging bag described in each of the above embodiments, as is clear from FIGS. 1 and 2, and 4 and 5, dense side seals 14S and 15S are present in a part of both side seals 14 and 15, respectively. Is what you do. The dense side seals 14S and 15S are formed by subjecting the side seal treatment a plurality of times (eg, 2 to 3 times) by heating and pressurizing, and the resin layer in that portion is dense and tough. Since it is finished as a product, it exhibits higher airtight sealability as a seal structure close to the end of the opening / closing tool.

Next, the embodiments of the processing jig for the opening / closing device terminal according to the present invention will be described below with reference to the embodiments exemplified in FIGS. 4 to 6.

The processing jig 61 illustrated in FIG. 7 is for processing the end portion of the opening / closing tool 31.41 and its periphery in the bag body 11 described above, and it is the end portion of the opening / closing tool 31.41 and its periphery. This is to improve the sealing performance of the surrounding area.

The processing jig 61 exemplified in FIGS. 7 (I) to 7 (V), the processing jig 61 exemplified in FIGS. 7 (VI) to (X), and the processing exemplified in FIGS. 7 (XI) to (XII). The jig 61 and the processing jig 61 illustrated in FIG. 7 (XIII) are each made of a metal having good heat resistance and thermal conductivity, for example, an alloy such as brass.

Of these, the processing jigs 61 shown in FIGS. 7 (I) to 7 (V) are mainly composed of a block-shaped substrate 62. The substrate 62 has a pressing surface portion 66, which will be described later, and a pair of side surfaces of the four side surfaces around the pressing surface portion 66 are inclined from around the intermediate portion toward the pressing surface portion 66. .. Flange 63 is provided on the other pair of side surfaces of the base 62, and the flange 63 has a groove-shaped or hole-shaped mounting portion 64 for hooking bolts, nuts, and other mounting members. Is formed.

In the processing jigs 61 of FIGS. 7 (I) to 7 (V), the base 62 is provided with a groove-shaped shaping recess 65 and a flat pressing surface portion 66 on its main surface. That is, the shaping recess 65 and the pressing surface portion 66 are arranged in the same plane of the base 62. Moreover, in the case of the pressing surface portion 66, this surrounds the shaping recess 65 and is adjacent to the shaping recess 65 without a gap. Here, the shaping recess 65 is for forming the above-mentioned fluid flow blocking portions 312L / 312R / 412L / 412R and the open restraint portions 313L / 313R / 413L / 413R. The shaping recess 65 further includes a preformed portion for primary forming a part of each side seal intervening portion 311L, 311R, 411L, 411R. Therefore, the shaping recess 65 has a recess shape that matches the fluid flow blocking portion, the opening restraining portion, the accessory portion thereof, and the like. Among the shaped recesses 65, the portions for forming the fluid flow blocking portions 312L, 312R, 412L, and 412R having the gradient shown in FIG. 3 (I) have a shape having a corresponding gradient. .. On the other hand, the pressing surface portion 66 is for forming the seal amplification portion 315L / 315R / 415L / 415R described above. Therefore, the pressing surface portion 66 has a flat surface for forming the seal amplification portion, which includes an area for forming the dense side seals 14S and 15S, as will be described later. The processing jigs 61 of FIGS. 7 (I) to 7 (V) also include one both fluid flow blocking portions 312L and 412L and both opening restraint portions 313L and 413L, and the other adjacent portions 313L and 413L during bag making. Since one fluid flow blocking portion 312R / 412R and both open restraint portions 313R / 413R are simultaneously formed, such an embodiment is also used. This will be described below.

When the processing jigs 61 of FIGS. 7 (I) to 7 (V) are viewed with the central vertical line of FIG. 7 (I) as the axis of symmetry, it can be said that the processing jigs 61 have a symmetrical shape structure. The substrate 62 of the processing jig 61 is provided with the above-mentioned shaping recess 65 and four pressing surface portions 66 on a common heat-pressing molded surface. Of these, the four shaping recesses 65 occupy relative positions vertically and horizontally on the shaping recesses 65 of FIG. 7 (I). Furthermore, the two upper and lower shaping recesses 65 on the left side of FIG. 7 (I) are parallel to each other in the same direction, and the two upper and lower shaping recesses 65 on the right side of FIG. 7 (I) are also parallel to each other in the same direction. However, in the relationship between the two shaping recesses 65 on the left side and the two shaping recesses 65 on the right side, their directions are opposite to each other.

In the case of the shaping recess 65 in the processing jig 61 of FIGS. 7 (I) to 7 (V), it can be regarded as one in terms of shape and structure, but this includes a plurality of recess zones Z1 to Z6 as follows. is there. These recessed zones Z1 to Z6 correspond to the following portions at the ends of both opening / closing tools 31 and 41. In the case of FIG. 7 (I), since the space for the code is small, the lower two shaping recesses 65 are not provided with the reference numerals Z1 to Z6. Reference numerals Z1 to Z6 omitted in the lower two shaping recesses 65 refer to reference numerals Z1 to Z6 attached to the upper two shaping recesses 65.
Recess zone Z1 → Open restraint part 313L (Open restraint part 413L)
Recessed zone Z2 → Fluid flow blocking part 312L (Fluid flow blocking part 412R)
Recessed zone Z3 → Part of side seal intervening part 311L (Side seal intervening part 411L) Recessed zone Z4 → Open restraint part 313R (Open restraint part 413R)
Recessed zone Z5 → Fluid flow blocking part 312R (Fluid flow blocking part 412R)
Recessed zone Z6 → Part of side seal intervening part 311R (side seal intervening part 411L)

As is clear from FIG. 7 (I), the pressing surface portion 66 of the processing jig 61 is also a single surface, in which a plurality of pressing areas Ar1 to Ar6 as described below coexist.
Pressing area Ar1 → Seal amplification unit 315L
Pressing area Ar2 → Seal amplification unit 415L
Pressing area Ar3 → Seal amplification unit 315R
Pressing area Ar4 → Seal amplification unit 415R
Pressing area Ar5 → Dense side seal 14S
Pressing area Ar6 → Dense side seal 15S

In the examples of FIGS. 7 (I) to 7 (V), the shapes of the seal amplification units 315L, 315R, 415L, and 415R are the polygons, arcs, and combinations of arcs and polygons described above. Since there are various shapes such as other irregular shapes, the shape of the pressing surface portion 66 in the processing jig 61 of FIGS. 7 (I) to 7 (V) also corresponds to the shape of such a seal amplification portion and is not shown in the example. Various shapes are adopted.

In the case of the processing jigs 61 illustrated in FIGS. 7 (VI) to 7 (X), the base 62 has a pressing surface portion 66, but the substrate 62 does not have a shaping recess 65. Furthermore, in the case of the processing jig 61 according to the embodiment, is the other configuration except that there is no shaping recess 65 substantially the same as that of the processing jig 61 of FIGS. 7 (I) to 7 (V)? Or, it is similar to it. Therefore, the description of other configurations of the processing jigs 61 of FIGS. 7 (VI) to 7 (X) will be omitted by referring to the corresponding items of the processing jigs 61 of FIGS. 7 (I) to 7 (V).

In the case of the processing jig 61 illustrated in FIGS. 7 (XI) to (XII), the configuration of the shaping recess 65 formed in the base 62 is different from that in the processing jig 61 of FIGS. 7 (I) to (V). However, other configurations are substantially the same as those of the processing jig 61 of the processing jigs 61 of FIGS. 7 (I) to 7 (V), or those equivalent thereto. Therefore, the description of other configurations in the processing jigs 61 of FIGS. 7 (XI) to (XII) will be omitted by referring to the corresponding items of the processing jigs 61 of FIGS. 7 (I) to 7 (V).

In the case of the processing jig 61 illustrated in FIG. 7 (XIII), in the processing jigs 61 of FIGS. 7 (I) to 7 (V), the shaping recesses 65 are reduced by one on each side, that is, a total of two shaping. The recess 65 is reduced. Also in the embodiment of FIGS. 7 (XI) to (XII), there is an example in which the two shaping recesses 65 are reduced in the same manner. In the case of the processing jig 61 according to the embodiment of FIG. 7 (XIII), the other configurations are substantially the same as those of the processing jig 61 of the processing jigs 61 of FIGS. 7 (I) to 7 (V). Or, it is similar to it. Therefore, the description of other configurations of the processing jig 61 of FIG. 7 (XIII) will be omitted by referring to the corresponding items of the processing jig 61 of FIGS. 7 (I) to 7 (V).

Examples of modifications of each processing jig 61 illustrated in FIG. 7 include those having only the left half or the right half with reference to the central vertical line of FIG. 7 (I) and the central vertical line of FIG. 7 (VI). There is a jig with only the left half or the right half as a reference, a jig with only the left half or the right half with reference to the central vertical line in Fig. 7 (XI), and a jig with the center vertical line in Fig. 7 (XIII) as a reference. Some have only the left half or the right half.

Each processing jig 61 illustrated in FIG. 7 is installed and used at a predetermined position on the bag making line (manufacturing line). Moreover, it is that the two are used as a pair of top and bottom. One of them was mounted on the upper surface of a lower mechanism (with a heat source) installed in place on the bag making line, and the other one was placed corresponding to the upper surface of the lower mechanism. It is mounted on the underside of the upper mechanism (with heat source) that can move up and down. In each of the upper and lower processing jigs 61 mounted in this way, the pressing surface portions 66 face each other.

In the case of the above two processing jigs 61 mounted on the bag making line and facing each other vertically, for example, the processing jig 61 is heated at a temperature of about 160 ° C., and the upper processing jig 61 is the lower processing jig 61. It moves up and down intermittently toward. On the other hand, both films 12 and 13 for the front and back of the bag pass between the upper and lower processing jigs 61 in a state of being overlapped with each other (opening and closing tool closed state). Therefore, both films 12 and 13 with the opening and closing tools 31 and 41 or both films 12 and 13 with the opening and closing tools 31 are sandwiched between the lower processing jig 61 that descends and the lower processing jig 61 that is in a fixed position. By heating and pressurizing, the opening / closing end side is sealed.

The two processing jigs 61 described above have the following combinations.
[First combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (I) to 7 (V) Lower processing jig 61 → Illustrated in FIGS. 7 (I) to 7 (V) [Second combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (I) to 7 (V) Lower processing jig 61 → Illustrated in FIGS. 7 (VI) to 7 (X) [Third combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (VI) to 7 (X) Lower processing jig 61 → Illustrated in FIGS. 7 (I) to 7 (V) [Fourth combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) Lower processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) [Fifth combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) Lower processing jig 61 → Illustrated in FIGS. 7 (VI) to (X) [6th combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (VI) to (X) Lower processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) [7th combination]
Upper processing jig 61 → Illustrated in FIG. 7 (XIII) Lower processing jig 61 → Illustrated in FIG. 7 (XIII) [8th combination]
Upper processing jig 61 → Illustrated in FIG. 7 (XIII) Lower processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) [9th combination]
Upper processing jig 61 → Illustrated in FIGS. 7 (XI) to (XII) Lower processing jig 61 → Illustrated in FIG. 7 (XIII)

The various processing jigs 61 described above may be integrated with the side seal bar 71. With respect to the side seal bar 71 with the processing jig 61 in such a case, the opening / closing terminal portion can be processed as described above in synchronization with the side seal at the time of bag making. In FIG. 8, various side seal bars 71 with the processing jig 61 are exemplified.

The side seal bar 71 with each processing jig 61 is as follows. In FIG. 8 (I), the processing jig 61 illustrated in FIGS. 7 (I) to 7 (V) is provided at one end of the side seal bar 71, and both are integrated. In FIG. 8 (II), the processing jig 61 illustrated in FIGS. 7 (VI) to 7 (X) is provided at one end of the side seal bar 71, and both are integrated. In FIG. 8 (III), the processing jig 61 illustrated in FIGS. 7 (XI) to 7 (XII) is provided at one end of the side seal bar 71, and both are integrated. In FIG. 8 (IV), the processing jig 61 illustrated in FIG. 7 (XIII) is provided at one end of the side seal bar 71, and both are integrated.

The side seal bar 71 with the processing jig 61 illustrated in FIGS. 8 (I) to 8 (IV) is also used as a pair of upper and lower sides. The two side seal bars 71 with the processing jig 61 to be combined in this case are selected based on the shape and structure of the processing jig 61. More specifically, it is made according to the first to ninth combinations described in paragraph 0062 above, similar to the combination examples of the processing jigs 61 illustrated in FIGS. 7 (I) to 7 (XIII).

In the bag body 11 described above, the reinforced seal jig 81 for forming the reinforced seal portions 51UL, 51CL, 51DL, 51UR, 51CR, and 51DR in the predetermined portion thereof is as follows with reference to FIG. ..

The reinforced seal jig 81 illustrated in FIG. 9 (I) is made of a metal having good heat resistance and thermal conductivity. In the case of the reinforced seal jig 81 shown in FIG. 9 (I), three blade-shaped pressing members 84L, 84C, and 84R are provided on the upper surface or the lower surface (mounting surface) of the base 83 provided with the rod 82 for elevating operation. Is what you are doing. More specifically, each pressing member 84L, 84C, 84R is orthogonal to the pressing surface portion of the substrate 83, and each pressing member 84L, 84C, 84R is parallel to each other and integrally with the mounting surface. It is provided. The reinforced seal jig 81 illustrated in FIG. 9 (II) is the one in FIG. 9 (I) in which the central pressing member 84C is omitted, and the other configurations are substantially the same as those in FIG. 9 (I). Is the same. In the reinforced seal jig 81 illustrated in FIG. 9 (III), the left and right pressing members 84L and 84R are omitted in the one shown in FIG. 9 (I). The reinforced seal jig 81 shown in FIG. 9 (III) is substantially the same as that shown in FIG. 9 (I) with respect to other configurations.

Each of the reinforced seal jigs 81 illustrated in FIG. 9 is used in the following cases. First, in the case of the reinforced seal jig 81 shown in FIG. 3 (I), for example, as is clear from FIG. 3 (II), there are three reinforced seal portions 51UL, 51CL, 51DL and three reinforced seal portions 51UL, 51CL, 51DL and three in a predetermined portion of the bag body 11. It is used when forming the reinforced seal portion 51UR / 51CR / 51DR. Next, in the case of the reinforced seal jig 81 shown in FIG. 2 (II), this is used when two reinforced seal portions 51UL / 51DL and two reinforced seal portions 51UR / 51DR are formed in a predetermined portion of the bag body 11. It is a thing. Further, in the case of the reinforced seal jig 81 of FIG. 3 (III), any one reinforced seal portion 51UL or 51CL or 51DL or any one reinforced seal portion 51UR or 51CR or 51DR is attached to a predetermined portion of the bag body 11. It is used when forming.

Regarding the side seal bar 71 illustrated in FIG. 9 (IV), this is as follows. The side seal bars 71 shown in FIGS. 8 (I) to 8 (IV) are equipped with a processing jig 61, whereas the side seal bars 71 shown in FIGS. 9 (IV) are composed of a single side seal bar. Incidentally, in the method of the present invention described later, instead of using the side seal bar 71 with the processing jig 61 of FIGS. 8 (I) to (IV), the processing jig as illustrated in FIGS. 7 (I) to (XIII) is used. When the 61 and the single side seal bar 71 are used in combination, the side seal bar 71 shown in FIG. 9 (IV) is used.

Next, the sealing method according to the present invention will be described with reference to FIGS. 10 and below.

As is well known, there are roughly two methods for manufacturing synthetic resin-based packaging bags: a row-row bag-making method and a column-row bag-making method. In the case of the row-row bag making method, as shown in FIG. 10 (I), the left side portion and the right side portion of the bag body are connected to each other to form a "horizontal chain", and finally the bags are separated and trimmed one by one. It is a thing. On the other hand, in the case of the columnar bag making method, as shown in Fig. 10 (II), the upper part and the lower part of the bag body are manufactured so as to be continuous, and this is also finally manufactured one bag at a time. It is separated and trimmed. As will be clear from the following description, the sealing method according to the present invention can be applied to both the row-row bag-making method and the column-row bag-making method. The sealing method according to the present invention is also carried out based on the side sealing process. It may be performed before the side seal process, at the same time as the side seal process, or after the side seal process.

The sealing method of the present invention carried out in the row-row bag making equation production line illustrated in FIG. 11 is carried out before the side sealing step. Further, in this example, since the bag body 11 having the upper and lower two-stage opening / closing tools 31 and 41 is to be manufactured, the upper mold processing jig 61 and / or the lower mold processing jig 61 is shown in FIG. Types such as I) and FIG. 7 (XI) are adopted. Of course, when the bag body 11 having one opening / closing tool 31 is to be manufactured, the type as shown in FIG. 7 (XIII) is adopted as the upper mold processing jig 61 and / or the lower mold processing jig 61.

In FIG. 11, both the bag front film and the bag back film 12 and 13 supplied from the film supply system on the upstream side of the production line to the downstream side of the production line merge with each other and overlap each other vertically, and are on their inner surfaces. Both male and female opening / closing members 32, 35, 42, and 45 are in an occlusal state. Further, both films 12 and 13 in this case proceed from the upstream side of the production line to the downstream side of the production line by receiving the intermittent feed.

After that, both films 12 and 13 flowing in a predetermined direction on the production line are first sealed with the bottom seal corresponding portion a plurality of times (twice) via the bottom seal bar 91. As a result, the bottom seal 17 is formed on both films 12 and 13. Then, the bottom seals 17 of both films 12 and 13 are cooled by the cooling bar 92.

After forming the bottom seal, the ends of both the opening / closing tools 31 and 41 are preheated by a well-known heating means 93 such as an ultrasonic heating means or a high frequency heating means. This residual heat is for allowing the subsequent processing of the end of the opening / closing tool to be smoothly performed without any trouble. The ends of both opening / closing tools 31 and 41, which have become easy to process due to the residual heat, pass through the processing jig 61, and by the way, in this illustrated example, FIGS. 7 (I) to (V) or 7 (XI) to The ends of both opening / closing tools 31 and 41 are processed mainly by the processing jig 61 of (XIII). Further, at the same time, the seal amplification portions 315L / 315R / 415L / 415R are formed via the processing jig 61, and the dense side seals 14S / 15S are also formed.

Both films 12 and 13 after the above are processed a plurality of times (twice) via the side seal bar 71 to form the side seals 14 and 15 at the corresponding portion of the side seal. After that, the side seals 14 and 15 of both films 12 and 13 are cooled via the cooling bar 94.

The bag 11 is completed at this stage on both films 12 and 13 after undergoing each of the above steps. Therefore, in the next step, the bag bodies 11 are separated one by one via the cutting bar (cutter) 95.

The above-mentioned sealing method is only an example. Therefore, by using the processing jig 61 shown in each figure of FIG. 7, it is possible to make various aspects of the end portions of the opening / closing tools 31 and 41 in the bag body 11. Of course, this also applies when the bag body 11 is provided with only one opening / closing tool.

The sealing method of the present invention may be carried out after the side seal is formed, not before the side seal is formed. In that case, the heating means (remaining heat means) 93 and the processing jig 61 are arranged after the side seal bar 71.

When the reinforced seal portion (51UL, 51CL, 51DL, 51UR, 51CR, 51DR, etc.) is also formed during the sealing process of FIG. 11, the reinforced sealing jig 81 as shown in FIGS. 9 (I) to 9 (III) is used. Be done. It is desirable that the sealing process by the reinforced sealing jig 81 is performed after the side seals 14 and 15 are formed. Therefore, the reinforced seal jig 81 is arranged after the side seals 14 and 15 on the production line of the bag body 11.

The sealing method according to the present invention can be applied not only to the row-row bag-making method described with reference to FIG. 11 but also to the column-row bag-making method, and FIG. 12 shows an example thereof. The sealing method of FIG. 12 is substantially the same as that of FIG. 11 except that the jigs, instruments, and devices correspond to columns. Therefore, the sealing method of FIG. 12 will be omitted by referring to the contents described with reference to FIG. However, the processing jig 61 used in the sealing method of FIG. 12 is based on the central vertical line of FIG. 7 (I) and the left half and the right half, and the central vertical line of FIG. 7 (VI) as a reference. Left half and right half, left half and right half based on the central vertical line in Fig. 7 (XI), left half and right half based on the central vertical line in Fig. 7 (XIII), etc. Is used.

The synthetic resin-based packaging bag according to the present invention has a fluid flow blocking section and a seal amplification section for blocking the flow of fluid in and around the end of the opening / closing tool. That is, since these components highly seal a predetermined part of the bag body, the fluid inside the bag leaks out of the bag or the fluid outside the bag leaks out of the bag when the opening / closing tool is closed (the bag mouth is closed). It does not invade the bag and maintains a high degree of airtightness. This technical content can be applied to the technical field of packaging bags. Therefore, it has sufficient industrial applicability.

11 Bag body 12 Bag front film 13 Bag back film 14 Side seal 14S Dense side seal 15 Side seal 15S Dense side seal 16 Top seal 17 Bottom seal 31 Opening and closing tool 311L Side seal interposition 311R Side seal interposition 312L Fluid flow blocking Part 312R Fluid flow blocking part 313L Open restraint part 313R Open restraint part 314 Opening and closing function holding part 315L Seal amplification part 315R Seal amplification part 32 Male opening and closing member 35 Male opening and closing member 41 Opening and closing tool 411L Side seal intervening part 411R Side seal intervening part 412L Flow blocking part 412R Fluid flow blocking part 413L Opening restraint part 413R Opening restraint part 414 Opening / closing function holding part 415L Seal amplification part 415R Seal amplification part 42 Male opening / closing member 45 Female opening / closing member 51UL Reinforced seal part 51CL Reinforced seal part 51DL Reinforced seal part 51UR Reinforced seal part 51CR Reinforced seal part 51DR Reinforced seal part 61 Processing jig 62 Base 65 Orthopedic recess 66 Pressing surface 71 Side seal bar 81 Reinforced seal jig 82 Rod 83 Base 84L Pressing member 84C Pressing member 84R Pressing member 91 Bottom seal bar 92 Cooling bar 93 Heating means 94 Cooling bar 95 Cutting bar (cutter)
Ar1 Pressing area Ar2 Pressing area Ar3 Pressing area Ar4 Pressing area Ar5 Pressing area Ar6 Pressing area Ed Edge area

Claims (4)

It is equipped with a bag for packaging and a horizontally long opening / closing tool for opening / closing the bag mouth of the bag body, and the opening / closing tool is a pair of horizontally long male opening / closing tools that can be freely engaged with each other. It consists of a member and a horizontally long female opening / closing member, and
On the inner surface of the bag front film and the inner surface of the bag back film, which are the parts on the bag mouth side in the bag body, the opening / closing tools are provided so as to occlude and face each other over both sides of the bag body. Being and
Side seals are provided on both sides of the bag body, and
Both ends of the opening / closing tool engage the male opening / closing member and the female opening / closing member so as to intersect the side seals on both sides of the bag body, and the side seal intervening portion of the opening / closing tool and the side seal are interposed. Is integrated with
In a synthetic resin packaging bag with an opening / closing tool
The horizontally long opening / closing tool extending between both side seals of the bag body provides a fluid flow blocking portion for blocking fluid flow inside and outside the bag at a portion on the end side of the opening / closing tool, and an opening function as the opening / closing tool. Having a restrained open restraint portion and an opening / closing function holding portion that holds an opening / closing function as an opening / closing tool, and
Regarding the fluid flow blocking portion, the opening restraining portion, and the opening / closing function holding portion, the fluid flow blocking portion is continuously located at the inner end portion of the both side seal intervening portions and is located inside the both side seals. In addition, the opening restraint portion is continuously located at the inner end portion of both fluid flow blocking portions and is located inside the fluid flow blocking portion, and the opening / closing function holding portion is both open. It is continuous with the inner end of the restraint and extends between the inner ends, and
The upper left corner portion, the upper right corner portion, the lower left corner portion, and the lower right corner portion formed by the fluid flow blocking portion and the open restraint portion arranged in a straight line and the side seal intersecting the two linear portions are described above. A part of the bag front film and a part of the bag back film are relatively adhered to form a seal amplification portion, and
The seal amplification portion in the upper left corner and the seal amplification portion in the upper right corner form a rectangle along the vertical direction, and the width of the bag mouth of the bag is narrowed by both seal amplification portions. In addition, the seal amplification section at the lower left corner and the seal amplification section at the lower right corner form a downwardly sharp pentagon having inclined sides inclined toward the left side seal and the right side seal, respectively. At the same time, the width of the non-seal region on the upper side of the bag body is gradually narrowed toward the bag mouth side of the bag body by both seal amplification parts, and
The lowermost end of the inclined side of the seal amplification portion of the lower left corner reaches the inner edge of the left side seal and is in contact with the inner edge of the left side seal, and is inclined at the seal amplification portion of the lower right corner. The bottom edge of the side reaches the inner edge of the right side seal and is in contact with the inner edge of the right side seal, and
Each of the seal amplification portions is continuous with respect to the three portions of the side seal, the fluid flow blocking portion, and the open restraint portion without any gap, and
Regarding the bag body in the closed state of the opening / closing tool in which the male opening / closing member and the female opening / closing member are meshed with each other, the fluid flow blocking portion and the seal amplification portion are the end portion of the opening / closing tool and its peripheral portion. A synthetic resin-based packaging bag with an opening / closing tool, which is characterized by blocking the flow of fluid. The synthetic resin-based packaging with an opening / closing tool according to claim 1, wherein a reinforced seal portion is formed at the boundary between the fluid flow blocking portion and the seal amplification portion and the boundary between the open restraint portion and the seal amplification portion. bag. The synthetic resin-based packaging bag with an opening / closing tool according to claim 1 or 2, wherein the surface of the fluid flow blocking portion is inclined downward toward the side seal side. Claim 1 or claim that the surface of the open restraint portion and the surface of the fluid flow blocking portion are set with a relative step in which the surface of the open restraint portion is high and the surface of the fluid flow blocking portion is low. Item 2. The synthetic resin packaging bag with an opening / closing tool according to item 2.

Images