JP2006087452A - Chuck tape and bag with chuck tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent retort food from being directly in contact with a fitting portion of a chuck tape without unintentionally opening the fitting portion of the chuck tape in a filling process or a distribution process depending on the weight of the contents. The present invention provides a chuck tape and a bag with a chuck tape, which are excellent in sealing performance, unsealing performance, resealing performance, and bag productivity even when the liquid fluid containing such a solid substance or a heavy one is contained.
SOLUTION: The tape body is formed of a tape body having a convex male fitting portion and a concave female fitting portion that can be fitted to each other, and the tape is formed on the inner surface near the upper portion of the packaging bag body. A pair of chuck tapes attached by thermal bonding at a pedestal of the body and a bag with the chuck tape using the same, on the surface layer side of the male mold and / or female fitting section of the tape body, At least one side of the lower pedestal is formed of an easy-peeling thermoadhesive resin.
[Selection] Figure 1

Description

  The present invention relates to a zipper tape and a bag with a zipper tape. More specifically, the zipper tape is provided on the inner surface near the mouth of the pouch and can be used as a resealable bag. The present invention relates to a zipper tape and a bag with a zipper tape that are excellent in sealing performance, unsealing performance, and filling suitability even if the content is a liquid fluid containing a solid material or a heavy product.

  Conventionally, it is composed of soft packaging material such as plastic film, and by attaching a plastic chuck tape to its mouth, it is easy to re-seal even after opening the bag once and improve usability, There is an increasing demand for attaching zippers to bags.

FIG. 7 shows a conventional chuck tape as an example. This chuck tape is composed of a tape body provided with convex male fitting portions that can be fitted to each other and a tape body provided with concave female fitting portions.
FIG. 8 shows a conventional bag with a chuck tape as an example.
This bag with a zipper tape is entirely formed of a film, and is attached by thermal bonding at the base of the tape body so that the male fitting part and the female fitting part face each other. After the bag is opened once, it can be easily resealed by the fitting and disengagement of the part and the female fitting part.
As a manufacturing method of the above-mentioned bag with a chuck tape, the fitted chuck tape is inserted between two thermoplastic films as a bag, and the metal plate of the guide is attached between the chuck tapes so that the chuck tapes are not fused. In the state where it is put in the gap, the packaging bag and the base part of the chuck tape are thermocompression bonded, and then the peripheral edge part is heat-sealed, leaving the filling port of the two plastic films, and the both ends of the chuck are made. The part is a method of manufacturing a bag with a zipper tape that becomes a part of the side seal of the bag in a form crushed by a point seal.

For example, a part of the tape body is heat-sealed to the packaging material to be the bag body prior to heat-sealing adhesion of the vertical seal part at the intersection of the chuck tape and the vertical seal part of the bag body. There is proposed a bag with a zipper tape having a point seal portion, wherein the point seal portion is wider than the vertical seal portion (for example, Patent Document 1). reference).
Registered Utility Model No. 2537579

However, in this bag with a zipper tape, the contents directly come into contact with the zipper tape, so damage to the fitting part due to moisture, fats and other migration components derived from the liquid fluid containing the solid content, There was a problem that liquid leakage occurred.
In addition, if the contents are heavy, there is a problem that the fitting portion of the chuck tape is unsealed due to its weight.

  An object of the present invention is useful as a packaging bag for contents that are used by taking out the filled contents little by little and resealing the contents, so that the contents do not directly contact the fitting portion of the chuck tape. Resistant to damage caused by ingredients derived from the contents, liquid leakage does not occur, and the weight of the contents does not inadvertently open the fitting part of the chuck tape in the filling process or distribution process. By providing a chuck tape and a bag with a chuck tape that are excellent in sealing performance, unsealing performance, resealability, and bag productivity even if the contents are liquid fluids containing heavy solids or heavy items. is there.

  Therefore, in order to solve the above-described problems, the chuck tape of the present invention is formed of a tape body having a male fitting portion with a convex stripe and a tape body having a female fitting portion with a concave stripe. A pair of chuck tapes attached to the inner surface near the upper part of the packaging bag body by heat bonding at the pedestal portion of the tape body, on the surface layer side of the male mold and / or female mold fitting section of the tape body Of the upper and lower pedestal portions, at least one of the pedestal portions is formed of an easy-peeling heat-adhesive resin.

  The bag with a zipper tape of the present invention is formed of two laminated films in which a sealant layer is laminated on the innermost layer, and heat-sealed on both sides and one end thereof, and the packaging bag main body A chuck tape according to claim 1, which is attached to the inner surface near the upper portion of the tape body by thermal bonding in the width direction, and the surface layer of the pedestal portion of the male and / or female fitting portion of the tape body In the upper and lower pedestal portions, at least one side of which the easy-peeling heat-adhesive resin layer is formed is weakly sealed and sealed with the pedestal portion of the opposing tape body by heat sealing, and The bottom end is sealed by heat sealing after filling the contents from the bottom side.

  In the chuck tape attached by thermal bonding to the inner surface of the bag mouth portion of the present invention, the chuck tape itself can be opened and closed with the fitting portion of the tape body fitted, and the chuck tape is attached to the mouth portion of the bag. It can be attached by thermal bonding to the inner surface of the tape and has an easy peel property on one side of at least one of the tape body pedestals. In particular, it contacts the contents opposite to the opening, that is, the contents. On the side, the contents do not come into direct contact with the chuck tape due to the easy peel property, and are not easily damaged by the components derived from the contents. Even if the fitting part is not opened carelessly, even if it is filled with a liquid fluid containing solids such as retort food or heavy contents, it will not leak, and it will seal, open, and reseal Excellent preservability and bags productivity of content, also after content filling, it is possible to boiling or retort treatment.

The materials used for the chuck tape of the present invention and the bag with the chuck tape will be described below.
The chuck tape is originally composed of a tape body provided with a protruding male fitting portion that can be fitted to each other and a tape body provided with a female fitting portion of a concave stripe, and the mouth portion of the bag. On the inner surface of the tape, both are placed so that the male fitting portion and the female fitting portion face each other, and the tape base is attached to the innermost layer constituting the bag by thermal bonding, The bag can be opened and closed easily and repeatedly by fitting or disengaging the male fitting portion and the concave female fitting portion.
In the present invention, at least one side of the pedestal portion of the surface layer on the side where the male and / or female fitting portions of the tape body are provided is formed of an easy-peeling thermoadhesive resin. It is a thing.
1 to 4 are sectional views showing the structure of an embodiment of the chuck tape of the present invention.
As shown in FIG. 1, the easy-peeling heat-adhesive resin layer 2 formed on the surface layer of the tape body on the side where the male or female fitting portion is provided is a protruding male type. The tape body 3 having the fitting portion and the tape body 4 having the concave female fitting portion may be provided only on one side of the fitting portion of one of the tape bodies, as shown in FIG. Thus, it can also provide in each one side in both tape bodies. In the case where the easy-peeling heat-adhesive resin layer 2 is provided on one side of both tape bodies, although not shown, they may be provided on different one sides of the fitting portions.
Furthermore, as shown in FIG. 3, the easy-peeling heat-adhesive resin layer 2 may be provided on both sides of one tape body 34, and on both sides of both tape bodies as shown in FIG. You can also.
FIG. 5 is a plan view showing a configuration of an embodiment of the bag 100 with a chuck tape shown in FIGS. As shown in FIG. 5, the tape body is placed on the packaging bag so that the position of the easy-peeling weak seal portion 14 is on the bottom opening side as viewed from the fitting portion, that is, the pedestal portion below the fitting portion 13 a. It is preferable to attach.
This prevents the contents from coming into direct contact with the chuck tape mating part, making it less susceptible to damage from components derived from the contents, and fitting the chuck tape with the weight of the contents during the filling and distribution processes. Even if a liquid fluid containing a solid material such as a retort food or a heavy content is filled without unintentionally opening the part, there is an advantage that the liquid does not leak and the sealing property is excellent.
FIG. 6 is a plan view showing the configuration of an embodiment of the bag 100 with a chuck tape shown in FIGS. As shown in FIG. 6, the position of the easy peel weak seal portion 14 may be attached to the packaging bag not only at the lower portion but also at the upper pedestal portion as viewed from the fitting portion 13a.
In addition, the peel strength at the heat-bonded part between the part that forms the easy-peeling heat-adhesive resin layer and the pedestal part of the opposing tape body is such that it can be easily opened by hand when taking out the contents. It is sufficient that the thickness is 0.1 N / 15 mm to 3 N / 15 mm, and more preferably 0.5 N / 15 mm to 1.5 N / 15 mm.

  First, the resin of the tape body having the male fitting portion of the protruding ridges and the female fitting portion of the concave ridges of such a chuck tape is a sealant constituting the laminated film of the bag It is necessary to decide in consideration of the relationship with the layer resin and the easy-peeling thermal adhesive resin. For example, low density polyethylene, ultra low density polyethylene, linear low density polyethylene, medium density polyethylene, high density Polyethylene, poly-4-methylpentene-1 copolymer unstretched polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl acrylate copolymer, ionomer, etc. The resin can be used.

When the easy-peeling heat-adhesive resin layer is formed by an extrusion molding method, the type of resin differs depending on the resin to be sealed (resin of the opposing tape body). For example, polypropylene and polyethylene A film made of a blend resin of the above, a polymer alloy of polypropylene and polystyrene, an ethylene-vinyl acetate copolymer film, and the like can be used.
For example, when the resin of the tape body is a polypropylene resin, the easy peel thermal adhesive resin layer is made of a blend resin of polypropylene and polyethylene, and when the resin of the tape body is a polyethylene resin, For the easy-peeling heat-adhesive resin layer, polyethylene and ethylene-vinyl acetate copolymer can be used.

The easy-peeling heat-adhesive resin layer is formed by coating, for example, an ethylene / vinyl acetate copolymer, a chlorinated polypropylene, or a mixed resin thereof as a main component and added. As the agent, a resin composition to which polyethylene wax, fatty acid amide, or the like is added can be used. The application amount of the resin composition can be formed at a dry application amount of about ² to 8 g / m ² .

The easy-peeling heat-adhesive resin layer is formed by extruding a chuck tape by using a die for forming a deformed shaped product in the width direction on the pedestal of the chuck tape main body previously extruded. A belt-like easy-peeling heat-adhesive resin layer can be formed by extrusion.
As another forming method, an easy-peeling heat-adhesive resin layer may be coated on a desired portion of the chuck tape body.
Among them, it is preferable to form by extrusion because productivity is better than to form by coating.

  As the laminated film used in the bag with the zipper tape of the present invention, a laminated film mainly composed of plastic is mainly used, but there is no particular limitation, and various configurations can be adopted depending on the contents to be filled. In a simple configuration, a sealant layer can be laminated on the base film layer, but depending on the required performance, water vapor can be used as an intermediate layer between the base film layer and the sealant layer. Other gas barrier layers, light shielding layers, strength improving layers, and the like may be laminated. In addition, each of the base film layer, the intermediate layer, and the sealant layer may be formed as a single layer, or may be formed by laminating a plurality of layers.

  In addition to the biaxially stretched polypropylene film, the base film layer includes a biaxially stretched polyester film such as a biaxially stretched polyethylene terephthalate film or a biaxially stretched polyethylene naphthalate film, nylon 6, nylon 66, MXD6 (polymethacrylate). A biaxially stretched polyamide film such as silylene adipamide) can be suitably used, but various engineering plastic films can also be used as necessary. These may be used singly or may be used by combining a plurality.

  When the intermediate layer is a gas barrier layer, the intermediate layer may be a film of ethylene / vinyl acetate copolymer saponified product (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), aluminum foil, or , Biaxially stretched nylon film (ON film), biaxially stretched polyethylene terephthalate film (PET film), biaxially stretched polypropylene film (OPP film), etc. provided with vapor deposition layers such as silica, alumina, aluminum, and PVDC coating layers Can be used. Among these, a film provided with an aluminum foil or an aluminum vapor deposition layer is opaque and can also serve as a light shielding layer. Moreover, when making an intermediate | middle layer into a strength improvement layer, the said base film may be additionally laminated | stacked suitably, and a biaxial stretching high density polyethylene film etc. can also be laminated | stacked also as a moisture-proof layer. A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and the intermediate layer.

  The innermost sealant layer includes low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer. , Ethylene / acrylic acid ester copolymer, polypropylene or a copolymer thereof can be used. For the lamination of the sealant layer, the above resin may be formed into a film and laminated by a dry lamination method or an extrusion lamination method, or the above resin may be laminated by extrusion coating.

FIG. 9 is a diagram showing an example of a method for attaching the chuck tape of the present invention.
Next, for attaching the chuck tape, a sealant layer was laminated on the innermost layer in a state where the male fitting portion and the female fitting portion were previously fitted using a conventional bag making machine. Inserted between two laminated films.
Next, in the base part of the chuck tape inserted between the two laminated films, the metal plate 31 is inserted on the side where the easy-peeling weak seal part is not formed, and then the heat seal bar from the outside. By heat-sealing at 32, the base portion of the chuck tape and the inner surfaces of the two laminated films can be thermally bonded.
In addition, a metal plate is not inserted on the side where the easy-peeling weak seal portion is formed, and heat sealing is performed from the outside to thermally bond the base portion of the chuck tape and the inner surfaces of the two laminated films. In addition, the pedestal of the male fitting portion and the female fitting portion can be sealed with an easy peel weak seal portion formed on at least one side of the pedestal.
Next, the two laminated films to which the chuck tape is attached are heat-sealed at regular intervals in a direction orthogonal to the chuck tape to form side seal portions, and the chuck tape attachment portion is parallel to the chuck tape. Then, the outer edge is heat sealed to form an upper edge seal portion, and then the center line of the side seal portion is cut by a cutter device to obtain a packaging bag with a zipper tape that is three-side sealed.
Next, the packaging bag with a zipper tape obtained above can be filled with the contents from the bottom, and the bottom seal can be formed by heat sealing to obtain a package with a zipper tape.
In addition, in the above, in order to obtain the sealing strength of the side seal portion, the fitting portion is crushed by applying pressure from the outside in a state where the male fitting portion and the female fitting portion are fitted in advance. It is preferable to keep it.
In addition, the chuck tape in which the male fitting portion and the female fitting portion are fitted is preliminarily formed by the punching machine before the side seal portion is formed. By punching out the portion to be formed at a predetermined interval, the seal strength of the side seal portion can be made uniform.
In addition, by making the side seal width of the portion to which the chuck tape is attached wider than other side seal widths, stable seal strength can be obtained.
It is preferable that the form of the bag is a four-sided seal type bag, whereby the bag can be made by a lateral flow method, and the respective tape bodies can be continuously supplied to the inner surface of the upper part of the bag and thermally bonded. The form is excellent in productivity.

In addition, in this case, a cut line by printing and notches can be provided between the upper edge seal portion of the bag and the chuck tape as a means for opening the bag.
The notch may be provided with a notch only at one end of the cut line, for example, the end on the side seal portion side, but a spot seal portion may be provided and a notch may be provided at that portion.
Accordingly, the upper edge seal portion can be cut off by easily tearing the bag along the cut line using the notch.
The notches such as I-shape and V-shape are usually used as the notches, but the shape is not particularly limited, and any shape having an acute angle portion in the cutting direction can be used.
Examples of the easy-opening means include, for example, a method of providing a notch that is widely used even in a normal laminated film bag, and a method of providing a half-cut line by laser light irradiation.
Moreover, when providing a half cut line, it is not limited to a straight half cut line, and may be provided by an intermittent half cut line such as a perforation. Furthermore, the number of such half-cut lines may be one, but assuming that the tearing direction is deviated, a plurality of half-cut lines such as one or two on each side of the center half-cut line. Can be provided in a shape that converges to a parallel or central half-cut line.
The bag opening means may be an opening instruction line such as a tear line displayed by printing or an opening instruction mark, and may be an easy opening means such as the following that facilitates the actual opening operation by tearing. There may be. Further, a plurality of these may be provided in appropriate combination.

The packaging bag with a chuck tape according to the present invention obtained above is attached by thermal bonding to the bag at the base portion of the tape body, and at least the lower surface portion of the base is sealed with a weak seal portion. , The contents do not come into direct contact with the mating part of the chuck tape, are not easily damaged by components derived from the contents, do not leak, and the chuck tape is used in the filling process and distribution process depending on the weight of the contents. Even if the fitting part of the product is not opened carelessly, the liquid fluid containing solids such as retort foods or heavy items etc. is excellent in hermeticity, and It is excellent in openability and resealability by fitting or disengaging.
In addition, since the easy-peeling heat-adhesive resin is formed on the chuck tape itself, there is no need for a pattern coating process with an easy-peeling heat-adhesive resin on the laminated film, resulting in excellent productivity. is there.

Hereinafter, the present invention will be described more specifically with reference to the drawings. However, the present invention is not limited to these drawings. FIG. 1 is a cross-sectional view showing the configuration of an embodiment of the chuck tape of the present invention.
The chuck tape 20 shown in FIG. 1 is made of a polyethylene resin as the tape body resin, and on the mating side surface of the tape body having the female female fitting portion of the concave stripe, polypropylene and polyethylene are provided on one side of the pedestal portion. Using the easy-peeling heat-adhesive resin layer made of a blended resin, a belt-shaped easy-peeling heat bond in the extrusion direction of the chuck tape body that was previously extruded using a die that forms a deformed shaped product By forming the adhesive resin layer by extrusion molding, the chuck tape 20 according to the present invention in which one side of the pedestal portion is formed of an easy-peeling thermoadhesive resin was produced.

Next, it is a top view which shows the structure of one Example of the bag 100 with a chuck tape shown in FIG.
First, a biaxially stretched nylon film having a thickness of 15 μm is used as a base film, and a urethane type anchor coating agent is coated on one side by a gravure roll coating method, from a thickness of 1 μm (dry state). An anchor coat agent layer was formed. Next, a linear low density polyethylene resin film having a thickness of 60 μm was laminated as a sealant layer on the surface of the anchor coating agent layer formed as described above, and a layer structure, a biaxially stretched nylon film (15 μm) / anchor coating agent layer ( A laminated film consisting of 1 μm) / linear low density polyethylene resin film (60 μm) was obtained.
Next, the tape body having the concave female fitting portion that forms the easy peel property produced on the one side as described above is obtained as described above in a state of being fitted with the male fitting portion made of polyethylene resin. The film was inserted between two laminated films. Next, a metal plate was inserted into the pedestal portion of the chuck tape, and then heat-sealed from the outside to thermally bond the pedestal portion of the chuck tape and the inner surfaces of the two laminated films.
Then, without inserting the metal plate, the easy peel property formed on at least one side of the pedestal is heat sealed with a width of 2 mm from the outside of the portion where the easy peel weak seal portion 14 is formed. The bases of the male fitting portion and the female fitting portion were sealed with a weak seal portion.
The peel strength of the easy-peeling weak seal portion was 0.8 N / 15 mm width.
As a result, in the filling process and the distribution process, the fitting portion 13a of the chuck tape is not opened carelessly due to the weight of the contents, and the sealing performance is excellent, and the consumer can easily remove the contents by hand. The peel strength was such that it could be opened.

Next, the chuck tape in which the male fitting portion and the female fitting portion are fitted is previously crushed by the point seal before the side seal portion is formed. .
Thereafter, the two laminated films attached with the chuck tape are heat-sealed with a heat seal width of 20 mm in a direction perpendicular to the chuck tape at the portion crushed by the point seal to form a side seal portion, and the chuck tape. The outer edge of the attachment portion is heat-sealed to form an upper edge seal portion, and then the center line of the side seal portion is cut by a cutter device, and the packaging bag 100 with a chuck tape (150 mm × 100 mm) sealed in three directions 200 mm).
Next, the packaging bag with zipper tape obtained above is filled with meatballs and sweet vinegar sauce (300 g) as the contents from the bottom, and sealed with a bottom seal part by heat sealing, at 90 ° C. for 60 minutes. Was boiled to obtain a package with chuck tape of Example 1 that had been boiled.
Since the package with a chuck tape obtained above is sealed with a weak seal at the pedestal portion on the filling side of the tape body, the fitting portion of the chuck tape is changed in the filling process and the distribution process depending on the weight of the contents. It was not opened carelessly, it did not leak, it had excellent sealing properties, and it could be easily opened and closed with a chuck tape by cutting off the upper edge seal.

(Comparative Example 1)
FIG. 7 is a cross-sectional view showing a configuration of a chuck tape 20 of a comparative example (conventional product).
The chuck tape shown in FIG. 7 is made of only polyethylene resin, and was formed by extrusion molding.
Next, it is a top view which shows the structure of the comparative example of the bag 100 with a chuck tape shown in FIG.
Using the chuck tape manufactured as described above, it was inserted between two laminated films having the same layer structure as in Example 1. Next, a metal plate was inserted into the pedestal portion of the chuck tape, and then heat-sealed from the outside to thermally bond the pedestal portion of the chuck tape and the inner surfaces of the two laminated films.
Next, the chuck tape in which the male fitting portion and the female fitting portion are fitted is the same as in the first embodiment, and before the side seal portion is formed, the chuck end portion is pointed in advance. It was crushed by the seal.
Thereafter, the two laminated films attached with the chuck tape are heat-sealed with a heat seal width of 20 mm in a direction perpendicular to the chuck tape at the portion crushed by the point seal to form a side seal portion, and the chuck tape. The outer edge of the mounting portion of the mounting part is heat-sealed to form an upper edge sealing part, and then the center line of the side sealing part is cut by a cutter device, and the packaging bag with a zipper tape (150 mm × 200 mm) is sealed. ) Was manufactured.
Next, the packaging bag with zipper tape obtained above is filled with meatballs and sweet vinegar sauce (300 g) as the contents from the bottom, and sealed with a bottom seal part by heat sealing, at 90 ° C. for 60 minutes. Then, a boil-treated package with chuck tape of Comparative Example 1 was obtained.
As a result, the migration of the liquid component derived from the contents was confirmed after boiling, and the fitting part opened due to the weight of the meatballs as the contents.

FIG. 2 is a cross-sectional view showing the configuration of another embodiment of the chuck tape of the present invention.
The chuck tape shown in FIG. 2 is made of a polyethylene resin as the tape body resin, the surface on the fitting side of the tape body 4 having the female female fitting portion 6 and the male male fitting portion of the convex stripe. On the surface facing the surface of the tape body 3 having 5, a die for forming a deformed product is formed using an easy peel thermal adhesive resin layer 2 made of a blend resin of polypropylene and polyethylene on one side. By using the easy-peeling heat-peeling resin layer in the extrusion direction of the chuck tape body part that was previously extruded, each of the pedestal part is made of an easy-peeling heat-adhesive resin. Two chuck tapes according to the present invention formed in the above were manufactured.

Next, it is a top view which shows the structure of one Example of the bag with a chuck tape shown in FIG.
Next, the tape body having the male fitting portion that forms the easy peel thermal adhesive resin layer 2 manufactured as described above on one side and the tape body having the female fitting portion are easy peel properties. In a state where the pedestal forming the heat-adhesive resin layer is arranged and fitted so as to face each other, it is inserted between two laminated films having the same layer configuration as in Example 1. Next, a metal plate was inserted into the pedestal portion of the chuck tape, and then heat-sealed from the outside to thermally bond the pedestal portion of the chuck tape and the inner surfaces of the two laminated films.
After that, the easy peel property weakness formed on at least one surface of the pedestal by heat-sealing with a width of 2 mm from the outside of the portion where the easy peel property weak seal portion is formed without inserting the metal plate. The pedestal of the male fitting portion and the female fitting portion was sealed with the seal portion.
The peel strength of the easy-peeling weak seal portion was 1.2 N / 15 mm width.
As a result, in the filling process and distribution process, the fitting part of the chuck tape is not opened carelessly by the weight of the contents, and it has excellent sealing performance, and the consumer can easily open it by hand when taking out the contents. The peel strength was as high as possible.

Next, the chuck tape in which the male fitting portion and the female fitting portion are fitted is previously crushed by the point seal before the side seal portion is formed. .
Thereafter, the two laminated films attached with the chuck tape are heat-sealed with a heat seal width of 20 mm in a direction perpendicular to the chuck tape at the portion crushed by the point seal to form a side seal portion, and the chuck tape. The outer edge of the attachment portion is heat-sealed to form an upper edge seal portion, and then the center line of the side seal portion is cut by a cutter device, and the packaging bag 100 with a chuck tape (150 mm × 100 mm) sealed in three directions 200 mm).
Next, the packaging bag with the zipper tape obtained above is filled with tuna (500 g) as the contents from the bottom, sealed at the bottom seal by heat sealing, retorted at 120 ° C. for 50 minutes, and retort A treated package with a zipper tape was obtained.
Since the package with a chuck tape obtained above has a stronger peel strength than the first embodiment, even if it is filled with a heavier content than that of the first embodiment, the chuck tape can be used in the filling process and the distribution process. The fitting part was not opened inadvertently, liquid leakage did not occur, the sealing performance was excellent, and the upper edge seal part was cut off so that it could be easily opened and closed with a chuck tape.

(Comparative Example 2)
FIG. 7 is a cross-sectional view showing a configuration of a chuck tape of a comparative example (conventional product).
The chuck tape 20 shown in FIG. 7 is made of only a polyethylene resin, and was formed by extrusion molding.
Next, it is a top view which shows the structure of the bag 100 with a chuck tape of the comparative example (conventional product) shown in FIG.
Using the chuck tape manufactured as described above, it was inserted between two laminated films having the same layer structure as in Example 2. Next, a metal plate was inserted into the pedestal portion of the chuck tape, and then heat-sealed from the outside to thermally bond the pedestal portion of the chuck tape and the inner surfaces of the two laminated films.
Next, the chuck tape in which the male fitting portion and the female fitting portion are fitted is the same as in the first embodiment, and before the side seal portion is formed, the chuck end portion is pointed in advance. It was crushed by the seal.
Thereafter, the two laminated films attached with the chuck tape are heat-sealed with a heat seal width of 20 mm in a direction perpendicular to the chuck tape at the portion crushed by the point seal to form a side seal portion, and the chuck tape. The outer edge of the attachment portion is heat-sealed to form an upper edge seal portion, and then the center line of the side seal portion is cut by a cutter device, and the packaging bag 100 with a chuck tape (150 mm × 100 mm) sealed in three directions 200 mm).
Next, the packaging bag with the zipper tape obtained above is filled with tuna (500 g) as the contents from the bottom, sealed at the bottom seal by heat sealing, retorted at 120 ° C. for 50 minutes, and retort A treated package with a zipper tape was obtained.
As a result, the transfer of the oil component derived from the contents was confirmed after the retort treatment, and the fitting part opened due to the weight of the tuna as the contents.

It is sectional drawing which shows the structure of the Example of the chuck tape of this invention. It is sectional drawing which shows the structure of another Example of the chuck tape of this invention. It is sectional drawing which shows the structure of another Example of the chuck tape of this invention. It is sectional drawing which shows the structure of another Example of the chuck tape of this invention. It is a top view which shows the structure of one Example of the bag with a chuck tape of FIG. 1 or FIG. It is a top view which shows the structure of one Example of the bag with a chuck tape of FIG. 3 or FIG. It is sectional drawing which shows the conventional chuck tape. It is a top view which shows the structure of the conventional bag with a chuck tape. It is a figure which shows an example of the attachment method of the chuck tape of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal adhesive resin 2 Easy-peeling thermal adhesive resin layer 3 Tape body provided with convex male fitting part 4 Tape body provided with concave female fitting part 5 Male fitting Part 6 Female mold fitting part 10 Laminated film 11 Upper edge seal part 12 Perforated intermittent cut line 13 Chuck tape body part 13a Fitting part 14 Easy peel weak seal part 15 Side seal part 16 Bottom opening part 20 Chuck Tape 31 Metal Plate 32 Heat Seal Bar 100 Bag with Chuck Tape

Claims (2)

The tape body is formed of a tape body having a male mating portion of a ridge that can be fitted to each other and a tape body having a female mating portion of a concave stripe, and a pedestal portion of the tape body on the inner surface near the upper portion of the packaging bag body A pair of chuck tapes that are attached by thermal bonding with
On the surface layer side of the male and / or female fitting portion of the tape body, at least one of the upper and lower pedestal portions is formed of an easy-peeling thermoadhesive resin. Chuck tape. Formed by two laminated films with a sealant layer laminated on the innermost layer, heat-sealed on both sides and one end, and heat bonded in the width direction to the inner surface near the top of the packaging bag body And the chuck tape according to claim 1 attached.
And in the surface layer of the pedestal portion of the male and / or female fitting portion of the tape body, a portion where an easy peel thermal adhesive resin layer is formed on at least one of the upper and lower pedestal portions. Is sealed with a weak seal with the pedestal of the opposing tape body by heat sealing,
A bag with a zipper tape, wherein the bottom end is sealed by heat sealing after filling the contents from the bottom side.

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