JP2010095286A - Packaging bag with zipper and standing package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag with a zipper, the bag enabling retort processing and enabling contents to be filled by use of a conventional filling equipment, and enabling the contents to be easily heated in a microwave oven. <P>SOLUTION: The packaging bag includes a zipper tape inside a part of the bag, which part is to be opened. A gusset is formed on the side opposite the part to be opened. One leading edge of the gusset is longer than the other leading edge thereof. An opening from which the contents are to be filled is formed in the longer leading edge of the gusset. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packaging bag with a zipper, and in particular, relates to a packaging bag with a zipper provided with a re-sealable content take-out opening portion separately from a filling opening portion, and a packaging body with a zipper using the packaging bag. .

  Conventionally, soft packaging bags such as standing pouches made of plastic film with a zipper called a male or female bite, or a zipper called a bite, in the vicinity of the opening, have been preserved and easily opened Due to its properties, it is used in many fields such as various foods, haptics, pharmaceuticals, detergents, and industrial chemicals.

  However, when the contents containing liquid materials and liquid components are sealed and packaged and subjected to heat and pressure sterilization such as retort processing, the contents of the zippered packaging bag may be increased due to pressure increase during retort processing or impact during transportation. There were problems such as leakage through the zipper and leaking toward the opening, making the pouch look worse, and contents popping out when opened.

  Moreover, if it fills from a zipper part, a zipper part will become dirty, and a zipper must be closed after filling and it must seal after that.

In order to improve these problems, in Patent Document 1, it is possible to prevent the transfer of the contents to the zipper part by reducing the thickness of the contact part between the zipper part and the contents, and at the same time to provide easy opening. In Patent Document 2, the zipper portion is provided with an easily openable tape portion and brought into contact with the inner surface portion of the pouch main body to isolate the zipper portion and the content, thereby preventing the content transfer to the zipper portion, and It has been proposed to enable easy opening through the easy-open tape at the time of opening.
JP 2007-331805 A JP 2007-106457 A JP 2007-276832 A

  However, if a zipper is present in the filling opening of the pouch, the zipper needs to be fitted and closed after filling the contents, and a special unit is required in addition to the conventional filling device.

  In the package shown in Patent Document 2, it is possible to fill the contents from the filling opening with the zipper fitted, but since the filling is performed from the upper side of the packaging bag close to the zipper, There is a concern of contamination due to the contents of the container, and in the package shown in Patent Document 1, advanced technology is required to adjust the thickness of the thin part of the zipper, and there is a concern that force may be required when opening depending on the thickness Is done.

  Therefore, it is desirable to fill the pouch with the content from the opposite side of the pouch from the zipper mounting portion, that is, from the lower part of the packaging bag.

On the other hand, it is desirable that the filled contents, particularly curry, pasta sauce, and other liquid-like foods, can be heated by the consumer using a microwave oven, and it is desirable to provide standing properties for convenience. However, after the pouch lower part is folded into a gusset shape in order to give standing properties, the conventional filling equipment cannot fill the contents from the lower unopened part side. That is, when an operation of grasping and opening the end of the filling opening during filling and filling the contents with the filling opening of one of the gussets, the pair of other gussets interfere with each other and the operation is hindered. In addition, the same interference cannot be avoided during the heat sealing of the filling opening after filling, and it has been difficult to smoothly perform filling, sealing, and conveyance with conventional equipment.

  In view of the circumstances as described above, it is an object of the present invention to provide a packaging bag with a zipper that can be retorted, can be filled with contents using conventional filling equipment, and can be easily heated in a microwave oven. And

  The present invention has been made in order to solve the above-mentioned problems, and the invention according to claim 1 is a packaging bag in which a zipper tape is provided on the inside of a planned opening portion of a packaging bag made of a laminated film. In addition, a gusset portion is provided on the opposite side of the planned opening portion, one end of the gusset portion is formed longer than the other, and a filling port for contents is provided at the end portion of the long gusset. This is a packaging bag.

  The invention according to claim 2 is the packaging bag according to claim 1, wherein the difference in length between the tip of the long gusset and the tip of the other gusset is 1 to 3 cm. is there.

  The invention according to claim 3 is a package characterized by using the packaging bag according to claim 1 or 2.

  The packaging bag with a zipper of the present invention is a packaging bag in which a zipper tape is provided on the inner side of the opening scheduled portion of the packaging bag made of a laminated film, and a gusset portion is provided on the opposite side of the opening scheduled portion, One end of the gusset portion is longer than the other, and the filling port for the contents is provided at the end portion of the long gusset so that the zipper of the planned opening portion is not contaminated and the lower portion is not The filling and sealing of the contents from the filling opening of the planned opening portion can be easily performed with a conventional apparatus.

  Moreover, not only is the standing property (self-supporting) secured by folding the bottom part of the package into a gusset shape, but also the standing property is imparted by providing a difference of 1 cm to 3 cm in the folding depth of both gussets. And the filling process suitability can be given.

  If the difference in length between the tip of the long gusset and the tip of the other gusset is less than 1 cm, interference with the other gusset is likely to occur during filling and sealing, and there is no suitability for manufacturing in a filling machine. . If this difference exceeds 3 cm, the packaging body is inclined when it is self-supporting, and not only the standing property is impaired but also the appearance is deteriorated.

  Moreover, in the packaging bag with a zipper of the present invention, it is possible to increase the capacity of the packaging bag by adjusting the folding depth of the gusset portion, and it is easy to increase the capacity without changing the size of the packaging bag become.

Thus, the zippered packaging bag of the present invention can be retorted in the zippered packaging bag, and the contents can be easily filled into the packaging bag using conventional filling equipment without any special capital investment. It is possible and very economical. Further, by making the non-opened portion into a gusset shape, the capacity can be easily changed without changing the area of the packaging bag. Since the packaging itself has a standing property, microwave heating can be easily performed, and spillage can be avoided, which is safe.

  Next, one embodiment (in the case of a microwave oven pouch) of the packaging bag with a zipper of the present invention will be described with reference to the drawings as necessary.

  FIG. 1 is a conceptual diagram of an example of a package with a zipper of the present invention, and FIG. 2 is a conceptual diagram of an example of a packaging bag with a zipper of the present invention used for the package.

  FIG. 3 is a schematic cross-sectional view showing an example of a laminated film constituting the packaging bag with a zipper of the present invention, and FIG. 4 is a schematic cross-sectional view showing an example of the intermediate layer film constituting the packaging bag with a zipper of the present invention. .

  FIG. 1 is a schematic view of a package with a zipper of the present invention sealed by heat-sealing two laminated films. The planned opening portion is equipped with a polyolefin film used for the innermost layer of the package and a zipper tape that can be heat-welded. The easy-open tape attached to this zipper tape is used as the innermost layer of the package. By adhering to the part, the contents and the zipper part are isolated, and the contents are prevented from moving to the zipper part.

  Although there is no special limitation regarding a zipper part, a zipper part as described in patent document 2 can also be used.

  The opposite side of the planned opening portion is folded into a gusset shape. The fold lengths (6) and (7) of the gusset are different from each other by at least 1 cm. Filling port. If the difference between the lengths of the gusset folds on the long and short sides is less than 1 cm, the other fold will be in the way when filling and sealing the contents, making it difficult to smoothly feed the package during the process from filling to sealing. become. If the length is different by 1 cm or more, filling and sealing from the long side folding side can be performed without any problem. If the difference in length between the long and short sides is 3 cm or more, it becomes difficult to stand up the package.

  As a manufacturing method of the package using the packaging bag of the present invention shown in FIG. 2, for example, a predetermined amount of contents such as boiled vegetables are filled from the filling mouth end (9). Fill the packaging bag, heat seal the filling opening and seal it to make a package with a zipper that has standing properties.

  When taking out the contents from the package of the present invention, after exposing the scheduled opening part with an easy-open tape, the zipper part composed of the engaging protrusion and the engaging concave part is opened, and the contents are taken out. After the necessary amount is taken out, the engagement protrusion and the engagement recess of the zipper portion can be fitted again and resealed.

  When heating the microwave oven, the gusset portion on the non-opening portion side is opened, and the pouch is self-supported and set in the microwave oven. Moreover, since this package is excellent in self-supporting property and the inner volume can be adjusted by the folding length of the gusset portion, the distance from the liquid surface to the opening can be kept long. As a result, it is possible to prevent spilling of the contents from the package, contamination in the range cabinet due to the overturn of the package, and further burns.

Although there is no special restriction | limiting about the material of the laminated | multilayer film used for the packaging bag with a zipper of this invention, It is important to select the material structure suitable for use conditions suitably. For example, when retort treatment is possible, physical vapor deposition of an inorganic oxide such as aluminum oxide or silicon oxide on a uniaxially or biaxially stretched polyethylene terephthalate film as a main body film,
Or the laminated film which laminated | stacked the inorganic compound vapor deposition polyethylene terephthalate film laminated | stacked by the chemical vapor deposition method to the thickness of about 20-100 nm, the nylon film excellent in tearability, and the unstretched polypropylene film which has heat-sealing property can be used suitably. . Moreover, as a material structure of a zipper, the zipper shape | molded with the polypropylene resin is suitable.

  As the laminated film, it is possible to use a laminated film that has a barrier property comparable to that of an aluminum foil and is suitable for heating in a microwave oven, and that can be easily inspected by a metal detector.

As such a laminated film, for example, on at least one side of a base material made of a plastic material, a general formula R′Si (OR) ₃ (R ′: an alkyl group, a vinyl group, a glycidoxypropyl group, etc., R: an alkyl group) Etc.) are sequentially laminated with a primer layer composed of a trifunctional organosilane or a hydrolyzate of the organosilane, a composite of acrylic polyol and an isocyanate compound, and a deposited thin film layer composed of an inorganic oxide having a thickness of 5 to 300 nm. And a laminated film including a gas barrier laminated film layer and a sealant layer.

  An example of the material configuration of the packaging bag with a zipper of the present invention will be described with reference to FIGS.

  The cross-sectional schematic diagram was shown as laminated film (100) in FIG. Of these, the printed layer (113), the intermediate layer (122) and, optionally, the adhesive layers (114) and (115) are not necessarily required as components of the laminated film used in the packaging bag with a zipper of the present invention. It is shown in the figure for simplification. Moreover, in the structure which does not require an intermediate | middle layer (122), the outer side base material (112) itself of FIG. 3 may become a structure which uses the gas barrier laminated film of FIG.

  The material of the film of the outer base material (112) used for the laminated film (100) of the zippered packaging bag of the present invention is not limited to these, and the material of the outermost base material layer may be heat resistant. If it has and is generally used as the packaging material for foods heated with a microwave oven, it can be used. For example, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefins such as polyethylene (PE) and polypropylene (PP), polyamides such as nylon-6 and nylon-66 (PA ), Polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), ethylene-bunyl alcohol copolymer (EVOH) and the like, Nylon-6 / metaxylylenediamine nylon 6 co-extruded film, polypropylene / ethylene-vinyl alcohol copolymer co-extruded film, or a laminate of two or more of these films A If the film may be.

  As a method of laminating each film, for example, a known method such as a dry lamination method, a non-solvent dry lamination method, an extrusion lamination method, and a sandwich lamination method using the extrusion lamination method can be used.

  For example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant can be added to the outer substrate (112), and they are appropriately added as necessary.

  Furthermore, the surface of the outer base material can be subjected to surface modification such as corona discharge treatment or anchor coating treatment to improve the adhesion with the sealant layer or the like. Moreover, a printing layer can be formed in the surface or back surface of a base film layer as needed.

  The thickness of the outer substrate (112) is not particularly limited, but is preferably in the range of 10 μm to 300 μm from the viewpoint of workability and physical properties.

  As the printing layer (113) used for the laminated film (100) of the packaging bag with a zipper of the present invention, a known ink such as urethane or vinyl acetate can be used, and the printing method is a known method such as gravure printing. Used.

  Furthermore, light-shielding printing can also be performed for the purpose of preventing deterioration of the package contents due to light rays. The shading printing can be carried out, for example, by a method in which a single layer or a plurality of layers of normal ink such as normal black ink and white ink, or white ink added with a small amount of color are stacked.

  As the adhesive layers (114) and (115) used for the laminated film (100) of the zippered packaging bag of the present invention, an adhesive such as a two-component curable urethane resin used in a known method such as a dry laminating method Can be used.

  In the packaging bag with a zipper of the present invention, for example, when it is necessary to improve the drop strength, puncture strength, and gas barrier property of the packaging bag, a polyamide, polyethylene terephthalate, straight line is provided between the outer base material and the sealant layer. An intermediate layer such as barrier nylon having a cutting property can be interposed. As a forming method, lamination can be performed by a known method such as a dry laminating method in which an adhesive such as a two-component curable urethane resin is used.

  As an intermediate layer (122) used for the laminated film (100) of the packaging bag with a zipper of the present invention, in order to improve the gas barrier property of the laminated film like an aluminum foil, a thin film of an inorganic compound such as aluminum oxide or silicon oxide is used. An inorganic compound vapor-deposited plastic film having a thickness of about 20 to 100 nm can be used by a vapor deposition method such as physical vapor deposition or chemical vapor deposition.

  Of course, an aluminum foil may be used as the intermediate layer (122).

  As an example, as shown in FIG. 4, the gas barrier laminate film (121) used as the intermediate layer (122) has at least one side of the gas barrier laminate base material (117) made of a plastic material on the outer surface of the packaging bag. In addition, a transparent primer layer (118), a vapor-deposited thin film layer (119) made of an inorganic oxide, and a gas barrier coating layer (120) are sequentially laminated.

  The above-mentioned gas barrier laminate substrate (117) is a plastic material, and a transparent film is preferable in order to make use of the transparency of the deposited thin film layer. For example, polyethylene terephthalate (PET), polyester film such as polyethylene naphthalate, polyolefin film such as polyethylene and polypropylene, polystyrene film, polyamide film, polyvinyl chloride film, polycarbonate film, polyacrylonitrile film, polyimide film, etc. are used. Either stretched or unstretched, and those having mechanical strength and dimensional stability are preferred. These are processed into a film and used. In particular, polyethylene terephthalate arbitrarily stretched in the biaxial direction is preferably used.

  Various well-known additives and stabilizers such as an antistatic agent, an ultraviolet ray preventing agent, a plasticizer, and a lubricant may be used on the surface of the gas barrier laminate base material (117). In order to improve the properties, corona treatment, low-temperature plasma treatment, ion bombardment treatment may be performed as pretreatment, and further chemical treatment, solvent treatment, and the like may be performed.

  The thickness of the gas barrier laminate base material (117) is not particularly limited, but suitability as a packaging material, that other layers may be laminated, vapor deposition comprising a primer layer (118) and an inorganic oxide. Considering the workability when forming the thin film layer (119) and the gas barrier coating layer (120), it is practically in the range of 3 to 200 μm and preferably 6 to 30 μm depending on the application.

  The primer layer (118) is provided on the gas barrier laminate substrate (117) made of a plastic material, and the adhesion between the gas barrier laminate substrate (117) and the deposited thin film layer (119) made of an inorganic oxide. The purpose is to prevent the occurrence of delamination (peeling) after heating such as retort sterilization in the food packaging field.

  The thickness of the primer layer (118) is not particularly limited as long as a uniform coating film can be formed, but is generally preferably in the range of 0.01 to 2 μm. When the thickness is less than 0.01 μm, it is difficult to obtain a uniform coating film, and the adhesion may be lowered. On the other hand, when the thickness exceeds 2 μm, the coating film cannot be kept flexible because it is thick, and the coating film may be cracked due to external factors, which is not preferable. Particularly preferred is a range of 0.05 to 0.5 μm.

  As a method for forming the primer layer (118), for example, a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, or a known coating method such as a roll coat, a knife edge coat, or a gravure coat is used. Can do. About drying conditions, generally used conditions may be used.

  The vapor-deposited thin film layer (119) made of an inorganic oxide is made of a vapor-deposited film of an inorganic oxide such as aluminum oxide, silicon oxide, tin oxide, magnesium oxide, or a mixture thereof, and has transparency and oxygen, water vapor, etc. Any gas barrier property may be used. Among these, aluminum oxide and silicon oxide are particularly preferable.

  The optimum thickness of the vapor-deposited thin film layer (119) varies depending on the type and configuration of the inorganic compound to be used, but generally it is preferably in the range of 5 to 300 nm, and the value is appropriately selected. However, if the film thickness is less than 5 nm, a uniform film may not be obtained or the film thickness may not be sufficient, and the function as a gas barrier material may not be sufficiently achieved. On the other hand, when the film thickness exceeds 300 nm, flexibility cannot be maintained in the thin film, and the thin film may be cracked due to external factors such as bending and pulling after the film formation. The thickness of the deposited thin film layer (119) is preferably in the range of 10 to 150 nm.

  There are various methods for forming the deposited thin film layer (119) made of an inorganic oxide on the primer layer (118), and it can be formed by a normal vacuum deposition method. An ion plating method, a plasma vapor deposition method (CVD), or the like can also be used.

  However, considering productivity, the vacuum deposition method is the best at present. As the heating means of the vacuum deposition apparatus by the vacuum deposition method, an electron beam heating method, a resistance heating method, or an induction heating method is preferable. In order to improve the adhesion between the thin film and the base material and the denseness of the thin film, a plasma assist method or an ion It is also possible to use a beam assist method. In addition, in order to increase the transparency of the deposited film, it is possible to carry out reactive deposition by blowing oxygen gas or the like during deposition.

  The gas barrier coating layer (120) is provided on the vapor-deposited thin film layer (119) made of an inorganic oxide in order to provide a gas barrier property as high as that of an aluminum foil depending on the required quality.

  The gas barrier coating layer (120) is mainly composed of an aqueous solution or a water / alcohol mixed solution containing at least one of a water-soluble polymer and (a) one or more metal alkoxides and hydrolysates or (b) tin chloride. The coating agent is used. Mineralize a solution in which water-soluble polymer and tin chloride are dissolved in an aqueous (water or water / alcohol mixed) solvent, or a solution in which metal alkoxide is directly or hydrolyzed beforehand. The deposited thin film layer (119) made of oxide is formed by coating and heating and drying.

  Each of the above components can be added to the coating agent alone or in combination, and further, an isocyanate compound, a silane coupling agent, or a dispersant, stabilizer, viscosity adjustment, as long as the gas barrier properties of the coating agent are not impaired. Known additives such as coloring agents and coloring agents can be added.

  For example, the isocyanate compound added to the coating agent has two or more isocyanate groups (NCO groups) in the molecule, and monomers such as tolylene diisocyanate, triphenylmethane triisocyanate, tetramethylxylene diisocyanate, etc. And polymers and derivatives thereof.

  As a method for applying the coating agent, conventionally known means such as a dipping method, a roll coating method, a screen printing method, a spray method and the like that are usually used can be used. The thickness of the coating varies depending on the type of coating agent and the processing conditions, but it is sufficient that the thickness after drying is 0.01 μm or more. However, if the thickness exceeds 50 μm, cracks are likely to occur in the film. The range of 01-50 micrometers is preferable.

  The sealant layer (123) used for the laminated film (100) in the packaging bag with a zipper of the present invention is provided as an adhesive layer when the packaging bag with a zipper is formed. Any resin can be used as long as it is heat-fusible. For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid copolymer. Resins such as polymers, ethylene-acrylic acid ester copolymers, and metal cross-linked products thereof are used. In consideration of retort sterilization suitability in food packaging, polypropylene resin is more preferable, and linear low density polyethylene resin is more preferably used from the viewpoint of process suitability.

  The thickness is determined according to the purpose, but is generally in the range of 15 to 200 μm. As a forming method, it is common to use a dry laminating method or the like in which a film-like material made of the above resin is bonded using an adhesive such as a two-component curable urethane resin. be able to.

  Moreover, the package body with a zipper of this invention can use a microwave oven, and can also provide a steam release mechanism. As a method for providing the steam release mechanism, a known method such as a method of providing a steam hole surrounded by a seal portion (Patent Document 3) can be applied.

  Specific examples of the present invention will be described below.

<Example 1>
In order from the outermost layer, an aluminum oxide (alumina) -deposited biaxially stretched polyethylene terephthalate film (alumina-deposited OPET) having a thickness of 12 μm, a biaxially stretched nylon film (ONy) having a thickness of 15 μm, and an unstretched polypropylene film having a thickness of 70 μm ( CPP) was laminated by dry lamination using a polyurethane-based adhesive to form a roll-shaped laminated film.

A roll of this laminated film is attached to the bag making machine, the laminated films are overlapped with the CPP layer on the inside, a zipper is attached to the opening scheduled portion side, and the folding length is 70 mm on the non-opening scheduled portion side. A zippered packaging bag (standing pouch) having a gusset portion of 50 mm was formed. (External dimensions: 180mm width x 150mm height x 70mm and 50mm length of bottom folding part, seal width 8mm)
The packaging bag was filled with 200 g of pasta sauce using a filling machine (TT8C) manufactured by Toyo Automatic Co., and retort treatment (121 ° C-30 minutes, retort sterilizer manufactured by Nisaka Co., Ltd.) was performed using a hot water recovery method. .

  Further, the retort-treated package was subjected to test evaluation for each of compression resistance strength, drop strength and appearance (JIS Z0238 sealed flexible packaging bag test method).

  Moreover, after opening a package about this package, it heated using the microwave oven (500 W, 3 minutes).

  Table 1 shows the evaluation results regarding the compression resistance strength, drop strength, deformation in the case of retort treatment, and the presence or absence of wrinkles by the methods specified in JISZ0238.

いずれの操作においても、従来の包装体と同様に、充填、レトルト強度、電子レンジ加熱ともに無事に完了した。

In any operation, as with the conventional package, filling, retort strength, and microwave heating were completed successfully.

  As a result, the packaging bag with a zipper of the present invention can be retorted, and can be easily filled into the packaging bag using conventional filling equipment without any special capital investment. It was confirmed that the microwave oven can be easily heated because of its standing property.

Conceptual diagram of an example of a package with a zipper of the present invention Conceptual diagram of an example of a packaging bag with a zipper of the present invention Sectional schematic diagram which shows an example of the laminated film which comprises the packaging bag with a zipper of this invention Sectional schematic diagram which shows an example of the intermediate | middle layer film which comprises the packaging bag with a zipper of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Packaging 2 ... Zipper part 3 ... Easy-opening seal part 4 ... Seal part 5 ... Filling port 6 ... Gusset folding part (long side)
7 ... Gazette folding part (short side)
DESCRIPTION OF SYMBOLS 8 ... Contents 9 ... Filling port edge part 100 ... Laminated film 112 ... Outer base material 113 ... Print layer 114 ... Adhesive layer 115 ... Adhesive layer 117 ... Gas barrier laminated body base material 118 ... Primer layer 119 ... Inorganic oxide vapor deposition Thin film layer 120 ... Gas barrier coating layer 121 ... Gas barrier laminated film 122 ... Intermediate layer 123 ... Sealant layer

Claims (3)

  A packaging bag in which a zipper tape is provided inside a scheduled opening portion of a packaging bag made of a laminated film, and a gusset portion is provided on the opposite side of the scheduled opening portion, and one end of the gusset portion is the other A packaging bag characterized in that it is formed longer and a filling port for contents is provided at the tip of the long gusset.   The packaging bag according to claim 1, wherein the difference in length between the tip of the long gusset and the tip of the other gusset is 1 to 3 cm.   A package using the packaging bag according to claim 1 or 2.

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