JP2009107666A - Zippered packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a zippered packaging bag which enables fluid accommodated in a packaging bag to be taken out as usual by opening an opening of the packaging bag in its size in the case of taking out the fluid accommodated in the packaging bag, prevents the fluid from attaching to a zipper even if small portions of the fluid are taken out many times to keep the same cleanness of the opening of the packaging bag always as the cleanness before opening, and causes neither leakage of the fluid from the opening-closing hole of the zipper nor deterioration of airtightness or sealing performance. <P>SOLUTION: In the zippered packaging bag having the zipper mounted to the opening of the fluidity-accommodating bag, a tubular tube member is attached to the inside of the zipper by bonding the inner outer circumference to the front and back films of the bag. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging bag with a plastic zipper. For more details, please refer to the following: Flowing materials (wheat flour, potato starch, yellow powder, powder detergent, wasabi powder, etc., granules such as instant coffee, salam, granule seasoning, etc. , Synthetic glue, ink, oils, paint, etc.) from the opening of the packaging bag, and when sealing the opening, the powder or granular material is placed on the zipper provided in the opening. The present invention relates to a packaging bag with a zipper that does not impair the sealing and opening / closing properties of the zipper by adhering to the zipper.

  In recent years, processed food products such as processed livestock products, processed fishery products, processed forest products, processed agricultural products, confectionery, seasonings, liquor, liquor products, cooked foods, household goods, industrial and pharmaceutical products, etc. In many cases, a plastic zippered packaging bag is used in which the opening is provided with a zipper comprising a pair of recesses and projections so that the opening can be reliably closed.

  This packaging bag with a zipper is attracting attention as a packaging bag in which a zipper for opening and closing is attached to the opening of a plastic packaging bag, and a filled fluid can be dispensed. And it is widely used not only for the distribution of fluids but also for storage.

  In addition, while the fluid is repeatedly dispensed from the packaging bag with the zipper filled with the fluid, a part of the fluid or the like adheres to the zipper and the zipper is clogged. And a fluid leaks from the opening and closing port of a zipper, and sealing property and sealing property worsen.

  As a plastic bag in which the zipper is not clogged, a plastic bag having a zipper-attached sachet (see, for example, Patent Document 1) is known.

  The plastic bag provided with this zippered pouch is a large bag for containing a flow material formed by welding a plastic film, and one end is an opening, and a peripheral part other than the opening is welded or folded. A plastic bag comprising a closed plastic film sachet, wherein the sachet is inserted and welded between the plastic films on one side of the large bag with the opening protruding from the one side In addition, a zipper composed of a concave portion and a convex portion is provided inside the vicinity of the opening, and the inner surface of the plastic film of the sachet is subjected to a welding inhibition process.

Prior art documents are shown below.
JP 2003-185851 A

  For this reason, when taking out the flow material stored in the large bag, it has to be taken out through the small bag, and there is a problem that it takes time and labor to take out.

Moreover, when taking out the flow material stored in the large bag, there is a problem that a part of the flow material to be taken out adheres to a zipper provided in the small bag. And the zipper provided in the sachet is clogged, and there is a problem that the flow material leaks from the opening and closing port of the zipper, and the sealing property and the sealing property are deteriorated.

  The present invention has been made in view of the above-described conventional problems, and the problem is that the size of the normal opening of the packaging bag is taken out when the fluid stored in the packaging bag is taken out. In order to take out the fluid that is opened and stored in the bag, the fluid does not adhere to the zipper even if the fluid is repeatedly dispensed, and the opening of the packaging bag is always as clean as before opening. And it is providing the packaging bag with a zipper from which a fluid does not leak from the opening and closing port of a zipper, and sealing property and sealing property do not worsen.

In order to solve the above problems, the invention according to claim 1 of the present invention provides:
A zippered packaging bag provided with a zipper at the opening of a bag for storing fluids,
A zippered packaging bag, characterized in that a tubular member having a cylindrical shape is inwardly attached to a zipper and is adhered to the front and back films of the bag at the inner periphery.

Next, the invention according to claim 2 of the present invention is as follows.
2. The zippered packaging bag according to claim 1, wherein the cylindrical member is narrower toward the tip than the close contact portion with the front and back films.

Next, the invention according to claim 3 of the present invention is
The length of the said cylindrical member is a packaging bag with a zipper of Claim 1 or 2 which is a length which a cylindrical member passes through a zipper part and exceeds the opening part of a bag.

  Since the packaging bag with a zipper of the present invention has the above-described configuration, the flowing material does not adhere to the zipper even if the stored flowing material is repeatedly dispensed. For this reason, a fluid does not leak from the opening and closing port of a zipper, sealing property and sealing property do not deteriorate.

  Furthermore, the zippered packaging bag of the present invention does not adhere to the zipper even if the flowed material is repeated three times, and the opening of the packaging bag is always as clean as before opening.

  Moreover, the packaging bag with a zipper of this invention can be manufactured at a normal production rate etc. using a well-known processing machine (a bonding machine, a printing machine, a bag making machine), etc.

  The packaging bag with a zipper of the present invention will be described in detail below along the embodiment with reference to the drawings.

  FIG. 1 is a schematic view showing an outline of an embodiment of a packaging bag with a zipper according to the present invention. (A) is a schematic diagram for explaining the outline of a packaging bag with a zipper before opening, and (b) is an opening. FIG. 6 is a schematic diagram for explaining an outline when taking out the filled fluid.

  As shown in FIG. 1, the packaging bag 10 with a zipper of this invention of this invention is formed from the plastic film. Moreover, the bottom gusset folding packaging bag 1 which has the gusset part 3 in the bottom part is used for the packaging bag 10 with a zipper of the Example shown in FIG. A zipper 2 is provided below the opening 11 inside the packaging bag 1.

  Further, the tubular member 4 is suspended below the zipper 2 by forming a tubular member seal portion 9 on the inner surface of the front film and the back film. And the outer periphery of the bottom gusset fold packaging bag 1 is adhere | attached on the inner surface of a front side film and a back side film, and the upper seal part 5, the right and left side seal parts 7 and 8, and the bottom seal part 6 are formed.

  Further, notches 12 for cutting the upper seal portion 5 are provided in the vicinity of the upper seal portion 5 of the left and right side seal portions 7 and 8. And when taking out the accommodated fluid, the opening part 11 is formed by cutting off the upper seal part 5 by the notch 12.

  The gusset portion 3 formed at the bottom of the bottom gusset folding packaging bag 1 folds the tape-shaped plastic winding base material 13 in half. Then, the half-folded plastic winding base material 13 is inserted into the inner surfaces of the bottom portions of the front film and the back film, and left and right side seals and bottom seals are applied.

  The outer surface of the plastic winding substrate 13 is adhesively sealed to the inner surface of the bottom portion of the front film and the back film. And when the bottom gusset folding packaging bag 1 is filled with a fluid or the like, it is preferable that the inner surface of the plastic winding base material 13 is not welded so that the bottom portion is formed in the shape of a turtle.

  For the plastic winding substrate 13, a laminate film, a two-layer coextruded film, or the like is preferably used. A heat seal lacquer can also be applied to the outer surface of the plastic winding substrate 13. Furthermore, the member which inhibits welding can also be applied to the inner surface.

  Examples of the resin on the outer surface of the plastic winding substrate 13 include a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a high density polyethylene resin (HDPE), and a linear low density polyethylene resin (L- LDPE), polypropylene resin (PP), ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene -Use a resin such as a methacrylic acid ester copolymer, an ethylene-acrylic acid ester copolymer, an ionomer resin, an ethylene-vinyl acetate copolymer (EVA), or a film or sheet obtained by forming a film of these resins. Can do.

  Moreover, as resin of the inner surface of the plastic winding base material 13, for example, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polypropylene (PP), polystyrene (PS), etc. Polyolefins such as nylon-6, nylon-66, polyamide (PA), polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl alcohol ( Stretched or unstretched films or sheets such as PVA), ethylene-vinyl alcohol copolymer (EVOH), polyether sulfone (PES), polymethyl methacrylate (PMMA) can be used.

  Moreover, as a heat seal lacquer used for the outer surface of the plastic winding base material 13, for example, a base resin may be a single or mixed thermoplastic polymer such as ethylene vinyl acetate, vinylidene chloride, chlorinated polyolefin, polyamide, or acrylic. What is used as can be applied to the outer surface of the base film and further dried to form the fixing portion.

  When coating the heat seal lacquer or the like, a coating machine such as a roll coater, an air knife coater, a gravure coater, a metering bar coater, a fountain blade coater, a bevel blade coater, a short dwell coater, or a curtain coater is used. The heat seal lacquer or the like may be provided only on the entire outer surface of the base film or on a portion necessary for sealing using any appropriate coating machine.

  Further, as a member that inhibits welding on the inner side surface of the plastic winding base material 13, it is also possible to apply a peeling cloth, silicon, wax, heat-resistant ink, etc. to the inner side surface and further dry to form a fixing portion. it can.

  When coating a member that inhibits welding, there are coating machines such as gravure printing machines, roll coaters, air knife coaters, gravure coaters, metering bar coaters, fountain blade coaters, bevel blade coaters, short dwell coaters or curtain coaters. used. The member that inhibits welding may be provided only on the entire inner surface of the inner film or on the sealed portion using any appropriate coating machine or printing machine.

And the film by which an inner surface is not welded by such a process can be obtained. Further, when sealing the outer surface of the plastic winding substrate 13 to the inner surfaces of the front film and the back film, a welding inhibition piece (for example, a thin iron plate) for inhibiting welding between the inner surfaces of the plastic winding substrate 13. Alternatively, a plastic plate such as a silicon resin plate) may be inserted.
wear.

  Further, the notch may be provided at either the outer tip of the left side seal portion 7 or the outer tip of the right side seal portion 8. It is more preferable to provide the notches 12 at the ends of the left and right side seal portions 7 and 8.

  The shape of the notch portion 12 is not particularly limited, such as a V-shaped notch, a U-shaped notch, or an I-shaped notch, but a V-shaped notch is desirable for easy opening.

  Moreover, when taking out the flow material accommodated in the gusset folding packaging bag 1 of the packaging bag 10 with a zipper of this invention, it is provided in the front-end | tip of the right-and-left side seal parts 7 and 8 below the upper seal 5. FIG. The upper seal portion 5 is cut off by any of the notches 12. And the cylindrical member 4 hanging down from the opening part of this packaging bag 1 under the zipper 2 is pulled out as shown in FIG.1 (b).

  Then, from the inner surface of the tubular member 4 from which the flow material stored in the bottom gusset folding packaging bag 1 is drawn, it flows completely to the base portion 21, the concave portion 22 and the convex portion 23 of the zipper 2 as shown in FIG. The object is taken out without touching.

  For this reason, even if the flow material is repeated three times, the flow material does not adhere to the base portion 21, the concave portion 22 and the convex portion 23 of the zipper 2. And a flow thing does not leak from the opening and closing port of a zipper, sealing property and sealing property do not deteriorate. Furthermore, the opening part 11 of the packaging bag 10 with a zipper can always be kept clean as before opening.

  Moreover, the packaging bag 10 with a zipper of this invention is not limited to the said bottom gusset folding packaging bag 1, A four-side seal packaging bag, a two-side seal packaging bag, a three-side seal packaging bag, a side seal packaging bag, an envelope sticker sealing packaging bag, It may be a flat bag such as a joint-sealed seal packaging bag or a ship bottom seal packaging bag.

  Furthermore, the lower part of a flat bag such as a three-sided seal packaging bag or a four-sided seal packaging bag is widened back and forth so that a rectangular flat bottom surface is formed at the bottom, or the bottom gusset fold is folded. Any form of packaging bag can be used, such as a self-standing packaging bag (standing packaging bag) having a different manufacturing method and form from the packaging bag 1.

  Next, FIG. 2 is a schematic diagram showing an outline of another embodiment of the packaging bag with a zipper of the present invention, (a) is a schematic diagram for explaining the outline of the packaging bag with a zipper before opening, (b ) Is a schematic diagram for explaining the outline when opening and taking out the filled fluid.

  As shown in FIGS. 2A and 2B, the above-described standing packaging bag 20 is used for the packaging bag 10 with a zipper of the present invention. The zipper 2 is provided below the opening 11 inside the packaging bag 20.

  Further, the tubular member 4 is suspended below the zipper 2 by forming a tubular member seal portion 9 on the inner surface of the front film 14 and the back film 15. The outer peripheral edge of the standing packaging bag 20 is bonded to the inner surface of the front film 14 and the back film 15. Further, an upper seal portion 5 and left and right side seal portions 7 and 8 are formed. Moreover, the gusset part which consists of the tape material 16 folded in half by the bottom part is formed.

The tape material 16 is sealed in a half-folded state on the inner surfaces of the front film 14 and the back film 15. The inner surface of the front film 14 and the back film 15 and the inner surface of the tape material 16 are adhesively sealed, and the outer surfaces of the tape material 16 are also adhesively sealed by the left and right side seal portions 7 and 8.

  Further, notches 12 for cutting the upper seal portion 5 are provided in the vicinity of the upper seal portion 5 of the left and right side seal portions. And when taking out the accommodated fluid, the opening part 11 is formed by cutting off the upper seal part 5 by the notch 12.

  The tape material 16 is a resin film that is also welded to the inner and outer surfaces, for example, a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a high density polyethylene resin (HDPE), and a linear low density polyethylene resin (L -LDPE), polypropylene resin (PP), ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), Films or sheets formed from a resin such as an ethylene-methacrylic acid ester copolymer, an ethylene-acrylic acid ester copolymer, an ionomer resin, an ethylene-vinyl acetate copolymer (EVA), or these resins are formed. Laminated film or sheet with laminated film or sheet It can be used.

  As the method for laminating, a laminating method used for producing a normal packaging material, for example, a wet lamination method, a sandwich lamination method, a dry lamination method, a thermal lamination method, a solventless lamination method, an extrusion lamination method, T A die extrusion molding method, a T-die coextrusion lamination method, an inflation method, a coextrusion inflation method, and the like are used.

  Further, when laminating, a film or sheet is subjected to a treatment such as corona treatment, ozone treatment or frame treatment in order to improve adhesion.

  When a resin is laminated on a film or sheet, for example, an anchor coating agent such as polyethyleneimine, polybutadiene, or organic titanium, or polyurethane, polyacryl, polyester, epoxy, polyvinyl acetate Known anchor coating agents, adhesives, etc., such as adhesives for laminating and cellulose-based laminates, can be arbitrarily used.

  Moreover, when taking out the flow material stored in the standing packaging bag 20 of the zippered packaging bag 10 of the present invention, it is provided at the tips of the left and right side seal portions 7 and 8 below the upper seal 5. The upper seal portion 5 is cut off by any notch 12. Further, the cylindrical member 4 hanging down from the opening of the packaging bag 20 below the zipper 2 is pulled out as shown in FIG.

  Further, as shown in FIG. 6, the flow material is completely transferred to the base portion 21, the concave portion 22, and the convex portion 23 of the zipper 2 from the inner surface of the tubular member 4 from which the flow material stored in the standing packaging bag 20 is drawn. Is taken out without touching.

  For this reason, even if a flow material is repeated three times, a flow material does not adhere to the base part 21, the recessed part 22, and the convex part 23 of the zipper part 2. FIG. And a flow thing does not leak from the opening and closing port of a zipper, sealing property and sealing property do not deteriorate. Furthermore, the opening part 11 of the packaging bag 10 with a zipper can always be kept clean as before opening.

  Next, FIG. 3 is a schematic diagram showing an outline of still another embodiment of the packaging bag with a zipper of the present invention, (a) is a schematic diagram for explaining the outline of the packaging bag with a zipper before opening, b) is a schematic diagram for explaining the outline when opening and taking out the filled fluid.

  As shown in FIGS. 3A and 3B, the above-described four-side sealed packaging bag 30 is used for the packaging bag 10 with a zipper of the present invention. A zipper 2 is provided inside the packaging bag 30 and below the opening 11.

  Further, the tubular member 4 is suspended below the zipper 2 by forming a tubular member seal portion 9 on the inner surface of the front film 14 and the back film 15.

  Moreover, when taking out the flow material accommodated in the four-side sealed packaging bag 30 of the packaging bag with a zipper 10 of the present invention, it is provided at the tip of the left and right side seal portions 7 and 8 below the upper seal 5. The upper seal portion 5 is cut off by any of the notches 12. Furthermore, the cylindrical member 4 hanging down from the opening 11 of the packaging bag 30 below the zipper 2 is pulled out as shown in FIG.

  Further, as shown in FIG. 6, the flow from the flow accommodated in the four-sided seal packaging bag 30 to the base portion 21, the concave portion 22, and the convex portion 23 of the zipper 2 is totally flowable. Objects are taken out without touching.

  For this reason, even if the flow material is repeated three times, the flow material does not adhere to the base portion 21, the concave portion 22, and the convex portion 23 of the zipper 2. And a flow thing does not leak from the opening and closing port of a zipper, sealing property and sealing property do not deteriorate. Furthermore, the opening part 11 of the packaging bag 10 with a zipper can always be kept clean as before opening.

  Further, as described above, the zipper is formed of the base portion 21, the concave portion 22, and the convex portion 23 as shown in FIGS. And the base part 21 of the zipper 2 is adhesively sealed at an appropriate position on the inner surface of the front film 14 and the back film 15 of the packaging bag.

  The adhesive seal between the front side film 14 and the inner side surface of the back side film 15 of the packaging bag 1, 20, 30 is heat in addition to heat seal, impulse seal, ultrasonic seal, hot air heat seal (hot air seal), high frequency seal, etc. There is a bonding method using an adhesive such as a sealing material or hot melt. An appropriate sealing method is selected depending on the form or material configuration of the pouch, the bag making machine, and the like.

Moreover, the manufacturing method of the zipper 2 can be produced by a known method such as an extruder into a shape in which the base portion 21 is formed in the concave portion 22 and a shape in which the base portion 21 is formed in the convex portion 23. Furthermore, it can also be produced by a known method in which a concave portion 22 or a convex portion 23 is formed on a base portion 21 made of a film or sheet while being extruded from an extruder or the like.

  The resin used for the zipper 2 is not particularly limited as long as it is a thermoplastic resin that can be adhesively sealed to the inner surfaces of the front film 14 and the back film 15, for example, low density polyethylene, medium density polyethylene, high density polyethylene. Cotton-like low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer , Polybutene resin, polyvinyl chloride resin, vinyl chloride-vinyl chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), Acrylonitrile butadiene Tylene copolymer (ABS resin), polyester resin, polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, diene resin, polyacetal resin, It can be arbitrarily selected from polyurethane resins, nitrocellulose and other known resins. In addition, for example, it is appropriately selected depending on the contents and the like.

  Next, the tubular member 4 suspended by the tubular member seal portion 9 below the zipper 2 provided on the inner surface of the front film 14 and the back film 15 of the packaging bag 1, 20, 30 is the seal. It is narrower from the portion 9 toward the tip. For this reason, when filling the packaging bags 1, 20, 30 with a fluid or the like, it can be efficiently filled.

  Further, when taking out the filled fluid or the like, the fluid or the like does not adhere to the zipper 2 or bite into the recess 22 at all. Furthermore, the length of the cylindrical member 4 is formed so as to exceed the opening 11 of the packaging bag 1, 20, 30. For this reason, when taking out the filled fluid etc., the cylindrical member 4 becomes a guide replacement, and the fluid etc. does not spill.

  The cylindrical member 4 is a plastic film or sheet. Then, both end edges are adhesively sealed by a known bag making machine.

  Examples of the adhesive seal include a heat seal, an impulse seal, an ultrasonic seal, a hot air heat seal (hot air seal), a high frequency seal, and the like, and a bonding method using an adhesive such as a heat seal material or hot melt. An appropriate sealing method is selected depending on the material of the cylindrical member 4, the configuration thereof, the bag making machine, and the like.

  The resin used for the plastic film or sheet of the cylindrical member 4 is not particularly limited as long as it is a thermoplastic resin that can be adhesively sealed to the inner surfaces of the front film 14 and the back film 15. For example, low density polyethylene , Medium density polyethylene, high density polyethylene, cotton-like low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid Acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, vinyl chloride-vinyl chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer Polymer (AS tree) ), Acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, diene The resin, polyacetal resin, polyurethane resin, nitrocellulose, and other known resins can be arbitrarily selected and used. In addition, for example, it is appropriately selected depending on the contents and the like.

The front film 14 and the back film 15 used for the zippered packaging bag 10 of the present invention are preferably laminated films. And at least a base film layer and a sealant layer are laminated.

  As a base film layer, it is a layer used as a base material of a packaging bag with a zipper, and a film or a sheet is used. Depending on the form of the packaging bag or the content of the fluid filled in the packaging bag, the storage period of the fluid, the distribution conditions, the method of use, etc., the property of shielding light such as sunlight, water vapor, water In addition, a film or sheet having the property of not allowing gas or the like to permeate can be used.

  A single base film or sheet may be used. Alternatively, a laminated film or sheet in which a base film or sheet and another film or sheet are laminated may be used. Also, a base film or sheet coated with a heat seal lacquer or the like can be used.

  Examples of the base film or sheet include low density polyethylene, medium density polyethylene, high density polyethylene, cotton-like low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene. -Ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, vinyl chloride-vinyl chloride copolymer, poly (meth) acrylic resin, Polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, polyester resin, polyamide resin, polycarbonate Resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, diene resin, polyacetal resin, polyurethane resin, nitrocellulose, and other known resin films or sheets. can do. In addition, for example, a film or sheet such as cellophane, paper, aluminum foil, synthetic paper, or the like can be used depending on the contents.

  Examples of the other film or sheet include polyterephthalate ester, polystyrene, polycarbonate, polyamide, saponified polyvinyl chloride ethylene-vinyl acetate copolymer, acrylic resin, cellulose acetate, and the like. .

  The film or sheet may be any of unstretched, uniaxially or biaxially stretched. The thickness is arbitrary, but can be appropriately selected from a range of several μm to 300 μm.

  As the heat seal lacquer, for example, an inner surface of a base film in which a thermoplastic polymer such as ethylene vinyl acetate, vinylidene chloride, chlorinated polyolefin, polyamide, acrylic or the like is used alone or as a mixture is used as a base resin. It is also possible to form a fixed part by coating the film and drying it.

  For the coating of the heat seal lacquer or the like, a coating machine such as a roll coater, air knife coater, gravure coater, metering bar coater, fountain blade coater, bevel blade coater, short dwell coater or curtain coater is used. . The heat seal lacquer or the like is applied to the entire inner surface or a part of the base film using any appropriate coating machine.

In addition, when barrier properties are required depending on the contents of the fluids stored in the zippered packaging bag 10 of the present invention, the storage period of the fluids or the distribution conditions, etc., on the base film made of the resin. A packaging material having a gas barrier layer can be used. As the gas barrier layer, for example, an aluminum foil, an inorganic oxide thin film, or a gas barrier resin layer can be used.

  Examples of the inorganic oxide thin film include a thin film obtained by making a metal oxide amorphous. Examples of the inorganic oxide include silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium ( Oxides such as Ti), lead (Pb), zirconium (Zr), yttrium (Y) can be used. And an inorganic oxide vapor deposition layer is formed on a base film using these inorganic oxides.

  Moreover, the inorganic oxide vapor deposition layer vapor-deposited on a polyethylene terephthalate film, a polyamide film, a polyvinyl alcohol film etc. as a gas barrier layer is formed in the thickness of 100 to 2000 mm.

  Further, the gas barrier resin layer includes an ethylene-vinyl alcohol copolymer film, a polyvinyl alcohol film, a saponified ethylene-vinyl acetate copolymer film, a polyethylene terephthalate film, a polyamide film, a polyvinyl alcohol film, and various films. A film or sheet coated with vinylidene chloride can be used.

  Furthermore, as a method of laminating, a laminating method used when producing a normal packaging material, for example, a wet lamination method, a sandwich lamination method, a dry lamination method, a thermal lamination method, a solventless lamination method, an extrusion lamination method, There are a T-die extrusion method, a T-die co-extrusion lamination method, an inflation method, a co-extrusion inflation method, and the like.

  Further, when laminating, a film or sheet is subjected to a treatment such as corona treatment, ozone treatment or frame treatment in order to improve adhesion.

  In addition, when the resin is laminated on the base film or sheet, for example, an anchor coating agent such as polyethyleneimine, polybutadiene, or organic titanium, or polyurethane, polyacryl, polyester, epoxy, poly, Known anchor coating agents, adhesives, and the like such as vinyl acetate-based and cellulose-based adhesives for laminating, and the like can be arbitrarily used.

  Moreover, a printing layer can also be provided by gravure printing, flexographic printing, silk screen printing, etc. on the front side surface or back side surface, or both front and back side surfaces of the base film or sheet.

  And when cosmetics etc. are requested | required of the packaging bag 10 with a zipper, gravure printing or flexo printing etc. are carried out on inner surfaces, such as a biaxially-stretched nylon film or a biaxially-stretched polyester film, in the outermost exterior of this packaging bag After printing, the film or sheet is laminated by a dry lamination method using a two-component curable polyurethane adhesive or the like.

  In general, printing is performed by gravure printing. When printing is performed by gravure printing, the printing ink is made using a known ink containing urethane, acrylic, vinyl, or rubber resin.

Next, the film or sheet of the sealant layer includes, for example, a low density polyethylene resin (
LDPE), medium density polyethylene resin (MDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (L-LDPE), polypropylene resin (PP), ethylene-propylene copolymer (EP), ethylene- α-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid ester copolymer, ionomer resin, ethylene -A film or sheet in which these resins are formed into a film, such as vinyl acetate copolymer (EVA), can be used.

  The thickness of the sealant layer takes into account strength, workability, and the like. In general, it is preferably in the range of 15 to 200 μm, more preferably in the range of 30 to 170 μm.

  Next, the base film or sheet and the sealant layer film or sheet are bonded via an adhesive layer, for example, dry lamination method, non-solvent dry lamination method, hot melt lamination method, extrusion lamination method, and extrusion lamination method. Are bonded using a known method such as a sandwich lamination method using

  As the adhesive used in the dry lamination method, generally, polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, and other laminating adhesives can be used.

  As the lamination adhesive, a solvent-type adhesive or a solvent-free adhesive is used. However, when a solvent-free adhesive is used, a drying apparatus is unnecessary, and in particular, a non-solvent dry lamination method and I'm calling.

  The hot melt lamination method is a method in which a hot melt adhesive such as a heat-melted ethylene-vinyl acetate copolymer (EVA) is applied onto a film, and another film is immediately laminated.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the outline of one Example of the packaging bag with a zipper of this invention, (a) is the schematic explaining the outline of the packaging bag with a zipper before opening, (b) is opened and filled. It is the schematic explaining the outline at the time of taking out the flowing fluid. It is the schematic which shows the outline of other one Example of the packaging bag with a zipper of this invention, (a) is the schematic explaining the outline of the packaging bag with a zipper before opening, (b) is opened, It is the schematic explaining the outline at the time of taking out the filled fluid. It is the schematic which shows the outline of another one Example of the packaging bag with a zipper of this invention, (a) is the schematic explaining the outline of the packaging bag with a zipper before opening, (b) is opened It is the schematic explaining the outline at the time of taking out the filled fluid. It is the schematic for demonstrating the zipper used for the packaging bag with a zipper of this invention. It is the other schematic for demonstrating the zipper used for the packaging bag with a zipper of this invention. It is explanatory drawing for demonstrating the state of the zipper at the time of opening the packaging bag with a zipper of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bottom gusset folding packaging bag 2 ... Zipper 3 ... Gusset folding part 4 ... Cylindrical member 5 ... Top seal part 6 ... Bottom seal part 7 ... Left side seal part 8 ... Right side seal part 9 ... Cylindrical member Seal part 10 ... Packaging bag with zipper 11 ... Opening part 12 ... Notch 13 ... Gusset tape 14 ... Front side film 15 ... Back side film 20 ... Standing packaging bag 21 ... Base part 22 ... Concave part 23 ... Convex part 30 ... Four-way seal packaging

Claims (3)

A zippered packaging bag with a zipper at the opening of the bag for storing contents,
A packaging bag with a zipper, characterized in that a tubular member having a cylindrical shape is inwardly attached to the inside of the zipper and is adhered to the front and back films of the bag at the inner periphery.   The packaging bag with a zipper according to claim 1, wherein the cylindrical member is narrower toward the tip than the close contact portion with the front and back films.   The packaging bag with a zipper according to claim 1 or 2, wherein the length of the cylindrical member is a length that the cylindrical member passes through the zipper part and exceeds the opening of the bag.

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