JP2003081284A - Reclosable packaging bag and manufacturing method thereof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve the working efficiency while shortening the processing time. SOLUTION: A packaging bag main body 14 having heat seal portions 16 on both sides, and a linear fastener 15 arranged at an opening of the packaging bag main body 14, are provided.
Is provided at a portion of the opening of the packaging bag main body 14 excluding the heat seal portions 16 on both sides by insert injection molding means. In order to make the reclosable packaging bag, the female fastener 18 and the male fastener 19 of the linear fastener 15 are formed in the film packaging material 30 at intervals by insert injection molding means.
Is folded in two so that the female fastener part 18 and the male fastener part 19 mesh with each other, and both sides of the folded film packaging material are heat-sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclosable packaging bag which can be resealed and a method for manufacturing the same.

[0002]

2. Description of the Related Art A reclosable packaging bag 1 which is generally used.
As shown in FIG. 25, an upper opening packaging bag in which heat-sealing portions 4, 5 and 6 are formed by stacking two sheets of plastic film packaging material 2 and 3 and heat-sealing both side portions and a lower end portion thereof. Main body 7 and opening 8 of the main body 7 of the packaging bag
And a linear fastener 9 joined to the inner surface of the. The open end of the reclosable packaging bag 1 is closed by heat sealing after storing the contents. The linear fastener 9 is formed of a fastener piece having a male meshing portion and a fastener piece having a female meshing portion.

When the linear fastener 9 is attached to the packaging bag body 7 when the reclosable packaging bag is made, the linear fastener 9 is cut to a length corresponding to the width of the plastic film packaging materials 2 and 3. One fastener piece of the cut linear fastener 9 is arranged on the inner surface of one end side of the packaging material 2 via an adhesive, and the other fastener piece of the cut linear fastener 9 is attached to the packaging material 3 via an adhesive. It is arranged on the inner surface at one end side. The linear fastener 9 is joined to the inner surface of the packaging bag body 7 when the packaging materials 2 and 3 are heat-sealed to form the packaging bag body 7.

[0004]

In the above-mentioned reclosable packaging bag, the linear fasteners are continuously provided from the outer end of the one side heat seal portion of the packaging bag body to the outer end of the other side heat seal portion. , Therefore, both sides of the body of the packaging bag are 2
It will be the thickness of the packaging material plus the thickness of the linear fastener,
When heat-sealing both sides of the packaging bag body, pressure and heat for crushing extra by the thickness of the linear fastener are required, and the heat-sealing process becomes longer.

In the reclosable packaging bag, the linear fastener is cut into a length 6 corresponding to the width of the plastic film packaging material, and the cut linear fastener is adhered to the inner surface of the plastic film packaging material. Two steps, that is, the step and the step, are required, which limits the improvement of work efficiency.

Also, the reclosable packaging bag itself is usually
Since it does not have rigidity, it is impossible to stack the reclosable packaging bag containing the contents when it is displayed as a product.

The present invention has been made in view of the above points, and an object of the present invention is to provide a reclosable packaging bag and a method for manufacturing the reclosable packaging bag which can shorten the processing time and improve the working efficiency. Especially.

Another object of the present invention is to provide a reclosable packaging bag which can be stacked.

[0009]

In order to solve the above-mentioned problems relating to processing time and work efficiency, the invention of claim 1 provides a packaging bag body having an opening and a heat-sealing portion,
In a reclosable packaging bag having a linear fastener provided in the opening of the packaging bag body, the packaging bag body is formed of a multilayer film, and the linear fastener of the packaging bag body by insert injection molding means. It is characterized in that it is provided along the opening and excluding the heat seal portion.

According to the present invention, since the linear fastener is provided by the insert injection molding means, the work efficiency of the step of attaching the linear fastener is improved. Also,
Since the linear fastener is provided by the insert injection molding means along the opening of the packaging bag body and excluding the heat seal part, the packaging bag body including the linear fastener portion can be bent and can be reclosed. Moreover, a self-supporting packaging bag can be obtained.

According to a second aspect of the present invention, in the reclosable packaging bag according to the first aspect, the multi-layer film is a biaxially stretched nylon film, an aluminum foil and a non-exposed film which are arranged in order from the outer side to the inner side. It is characterized by having a stretched polypropylene film.

In this case, layers other than the biaxially stretched nylon film, the aluminum foil and the non-stretched polypropylene film may be further provided between the layers, inside each layer or outside each layer. The printing layer may be provided at an appropriate position.

According to a third aspect of the present invention, in the reclosable packaging bag according to the first aspect, the multilayer film is a biaxially stretched nylon film with an aluminum vapor-deposited film, which is arranged at least in order from the outside to the inside, and The biaxially stretched nylon film with an aluminum vapor deposition film is arranged so that the aluminum film formed on the biaxially stretched nylon film with an aluminum vapor deposition film faces the inside of the multilayer film, which has an unstretched polypropylene film. Is characterized by.

In this case, layers other than the biaxially stretched nylon film with the aluminum vapor deposition film and the unstretched polypropylene film may be further provided between the layers, inside each layer or outside each layer. The printing layer may be provided at an appropriate position.

According to a fourth aspect of the present invention, in the reclosable packaging bag according to the first aspect, the multilayer film is a biaxially stretched polyethylene terephthalate film with an aluminum vapor deposition film, which is arranged in order from at least the outside to the inside. And a biaxially stretched polyethylene terephthalate film with an aluminum vapor deposition film, wherein the aluminum film formed on the biaxially stretched polyethylene terephthalate film with an aluminum vapor deposition film faces the inside of the multilayer film. It is characterized by

According to a fifth aspect of the present invention, in the reclosable packaging bag according to the first aspect, the multilayer film is a biaxially stretched nylon film with a transparent inorganic vapor deposition film, which is arranged at least in order from outside to inside. And an unstretched polypropylene film, with the aluminum vapor deposition film 2
The biaxially stretched nylon film with a transparent inorganic vapor deposition film is arranged so that the transparent inorganic vapor deposition film formed on the axially stretched nylon film faces the inside of the multilayer film.

In this case, layers other than the biaxially stretched nylon film with a transparent inorganic vapor deposition film and the unstretched polypropylene film may be further provided between the layers, inside each layer or outside each layer. The printing layer may be provided at an appropriate position.

According to a sixth aspect of the present invention, in the reclosable packaging bag according to the first aspect, the multilayer film is a biaxially stretched polyethylene terephthalate with a transparent inorganic vapor deposition film, which is arranged at least in order from outside to inside. A biaxially stretched polyethylene with a transparent inorganic vapor deposition film so that the transparent inorganic vapor deposition film formed on the biaxially stretched polyethylene terephthalate film with a transparent inorganic vapor deposition film faces the inner side of the multilayer film, having a film and an unstretched polypropylene film. A terephthalate film is arranged.

According to a seventh aspect of the present invention, in the reclosable packaging bag according to any one of the first to sixth aspects, the heat seal portions are provided on both sides of the packaging bag body. And

According to an eighth aspect of the present invention, in the reclosable packaging bag according to any one of the first to sixth aspects, the heat-sealing portion is one of a pair of opposing surfaces of the packaging bag body. It is characterized in that it is provided on one side.

According to a ninth aspect of the present invention, in the reclosable packaging bag according to the eighth aspect, the heat seal portion is provided in the center of either one of the pair of facing surfaces. To do.

According to a tenth aspect of the present invention, in the reclosable packaging bag according to any one of the first to ninth aspects, the reclosable packaging bag is arranged in the packaging bag body and holds the packaging bag body in a predetermined shape. It is characterized by further comprising a sleeve for.

As the material of the sleeve, the same material as the innermost layer of the packaging bag body, for example, polypropylene may be used. In this case, the sleeve and the packaging bag body can be heat-bonded.

The invention according to claim 11 is the reclosable packaging bag according to claim 10, characterized in that the sleeve is foldable.

According to a twelfth aspect of the present invention, in the reclosable packaging bag according to the tenth aspect or the eleventh aspect, the sleeve has a protrusion capable of contacting the bottom of the packaging bag body and folding. It is characterized by doing.

According to a thirteenth aspect of the present invention, in the reclosable packaging bag according to any one of the tenth to twelfth aspects, the sleeve is at least one fold located on the opening side of the packaging bag body. It is characterized by having a bendable reinforcing flap.

According to a fourteenth aspect of the present invention, the sleeve has a removable portion, and the removable portion is the reclosable packaging bag according to any one of the tenth to thirteenth aspects. The sleeve is deformable such that it is accessible when the reclosable packaging bag is opened and when released, is released from the predetermined shape in which the packaging bag body is retained. It is characterized by

The removable part may be detachable, for example by forming a tear line on the sleeve. Further, the removable portion may be configured to be used as an inner lid in the main body of the packaging bag, or may be used as the reinforcing flap described in claim 12.

According to a fifteenth aspect of the present invention, in the reclosable packaging bag according to the fourteenth aspect, the removable portion is
It is characterized by having a finger hole for facilitating its removal.

A sixteenth aspect of the present invention is the reclosable packaging bag according to any one of the tenth to fifteenth aspects, wherein the packaging bag body is folded in conformity with the predetermined shape, and the linear fastener is formed. Is provided with a foldable portion for facilitating folding of the packaging bag body.

The easy-to-bend portion may be configured to be used as a steam vent.

According to a seventeenth aspect of the present invention, in the reclosable packaging bag according to the sixteenth aspect, the easy-to-fold portion is provided by forming a notch line in the linear fastener.

According to an eighteenth aspect of the present invention, in the reclosable packaging bag according to the sixteenth aspect, the easy-to-fold portion is provided by forming a thin wall thickness of the linear fastener in a predetermined region. And

According to a nineteenth aspect of the present invention, in the reclosable packaging bag according to the sixteenth aspect, the linear fastener includes a female fastener portion and a male fastener portion engageable with the female fastener portion. The easy-to-fold portion is configured by a flat portion obtained by partially removing the female fastener portion and the male fastener portion.

According to a twentieth aspect of the present invention, in the reclosable packaging bag according to the nineteenth aspect, the flat portions have sealing assisting means for contacting each other and sealing the flat portions. It is characterized by being

The invention of claim 21 is the reclosable packaging bag according to any one of claims 10 to 20, wherein the packaging bag body has at least one stopper portion for positioning the sleeve. It is characterized by doing.

According to a twenty-second aspect of the present invention, there is provided a packaging bag body having an opening and a heat-sealing portion, and a reclosable packaging bag provided with a linear fastener provided in the opening of the packaging bag body. The packaging bag body further comprises a sleeve disposed inside the body, and the packaging bag body is folded in conformity with a predetermined three-dimensional shape defined by the sleeve and is held in conformity with the predetermined three-dimensional shape. Is formed of a multilayer film.

The invention of claim 23 is characterized in that the reclosable packaging bag according to any one of claims 1 to 22 is a retort packaging bag.

According to a twenty-fourth aspect of the present invention, the linear fastener parts are formed at predetermined positions of the film packaging material on which the linear fasteners are to be provided by the insert injection molding means at a distance from each other, and the film packaging material is molded. The linear fastener part is folded in two so as to be meshed with each other, and both sides of the folded film packaging material are heat-sealed to form side heat-sealing parts. It is characterized by being formed.

According to a twenty-fifth aspect of the present invention, the linear fastener portions are continuously formed at predetermined positions of the roll-shaped film packaging material on which the linear fasteners are to be provided, by the insert injection molding means, at intervals from each other. The roll-shaped film wrapping material is cut into independent film wrapping materials, the film wrapping material is folded in two so that the linear fastener portions mesh with each other, and the two sides of the folded film wrapping material are heat-sealed. Then, the side heat seal portion is formed, and the packaging bag body is formed of a multilayer film.

The invention of claim 26 is the method for manufacturing a reclosable packaging bag according to claim 24 or 25,
The linear fastener is continuously molded except for the side heat seal portion.

According to a twenty-seventh aspect of the present invention, a single film packaging material is folded in two to prepare an unbonded main body for a packaging bag whose upper end and both side ends are not bonded to each other. The upper ends are mutually bent in a direction away from each other to form a pair of bent portions, the pair of bent portions are set in a linear fastener molding die, and a linear fastener portion for a linear fastener is formed in the pair of folded portions. The inner surface of the bent portion is continuously molded by insert injection molding means except for both end portions, and both end portions of the unbonded body for packaging bag are heat-sealed over their entire length. The packaging bag body is formed of a multilayer film.

According to a twenty-eighth aspect of the present invention, a single film packaging material is folded in two to prepare an unbonded main body for a packaging bag in which upper and lower ends and one side end are not bonded to each other. A notch is formed at the upper end at the other side end of the joined body, and the upper ends of the unjoined body for packaging bag corresponding to the length of the notch are bent in directions away from each other to form a pair of bent portions. , The pair of bent portions are set in a linear fastener forming die, and the linear fastener portions for the linear fasteners 1 are continuously formed on the inner surfaces of the pair of folded portions except both end portions by insert injection molding means. And heat-seal the lower end and the one side end of the unbonded main body for the packaging bag over the entire length direction, respectively. Consists step of heat-sealing only the upper end of the other side end of the body, the packaging bag body, characterized in that it is formed by a multilayer film.

According to a twenty-ninth aspect of the invention, the opposite ends of a single film packaging material are overlapped with each other and heat-sealed over the entire length of the overlapped portion to form a heat-sealed portion. , Therefore, to prepare an unbonded body for packaging bag with open upper and lower ends, so that the heat-sealed portion is separated from one side end by a predetermined distance, fold the unbonded body for packaging bag flat, A notch is formed at each of the upper ends of the unbonded body for a packaging bag, and the upper ends of the unbonded body for a packaging bag that correspond to the length of the notch are mutually bent in a direction away from each other to form a pair of bent portions. And the pair of bent portions are set in a linear fastener forming die, and the linear fastener portion for the linear fastener is formed on the inner surface of the pair of bent portions by insert injection molding. By means of continuous molding except for both side end portions, the lower end of the unbonded body for packaging bag is heat-sealed over the entire length thereof, and the unbonded body for packaging bag corresponding to the cut is formed. It is characterized in that it comprises a step of heat-sealing only the upper ends of the both side ends of the main body, and the packaging bag main body is formed of a multilayer film.

According to a thirtieth aspect of the present invention, at least two film packaging materials are superposed on each other to prepare an unbonded main body for a packaging bag in which upper and lower ends and left and right ends are not bonded to each other. The upper ends of the at least two film packaging materials in the unbonded main body are mutually bent in directions away from each other to form a pair of bent portions, and the pair of bent portions are set in a linear fastener molding die to form a linear shape. A linear fastener portion for a fastener is continuously molded on the inner surfaces of the pair of folded portions except for both end portions by insert injection molding means, the lower end of the unbonded main body for the packaging bag and the left and right side ends. Is heat-sealed over its entire length, and the packaging bag body is formed of a multilayer film.

According to a thirty-first aspect of the present invention, in the method for producing a reclosable packaging bag according to any one of the twenty-fourth to thirtieth aspects, after the final step, the packaging bag body is provided with a predetermined shape. The method further comprises the step of inserting a sleeve for holding the sleeve.

According to a thirty-second aspect of the present invention, in the method for producing a reclosable packaging bag according to any one of the twenty-sixth to thirtieth aspects, a packaging bag body is predetermined in the unbonded packaging bag body. The method further comprises the step of disposing a sleeve for maintaining the shape.

A thirty-third aspect of the present invention is a reclosable packaging bag comprising a packaging bag body having an opening and a heat seal portion, and a linear fastener provided in the opening of the packaging bag body, wherein the packaging bag is a resealable packaging bag. A sleeve for holding the packaging bag body in a predetermined shape is provided in the main body, the packaging bag body is formed of a multilayer film, and the linear fastener is opened in the packaging bag body by insert injection molding means. Provided along the portion, and excluding the heat seal portion, the packaging bag body is folded according to the predetermined shape, the linear fastener to facilitate folding of the packaging bag body. A foldable portion is provided, and the foldable portion functions as a steam vent that releases steam inside the reclosable packaging bag when the reclosable packaging bag is heated. And wherein the Rukoto.

According to a thirty-fourth aspect of the present invention, in the reclosable packaging bag according to the thirty-third aspect, the reclosable packaging bag is configured to maintain a predetermined shape by internal pressure when heated. Characterize.

The invention of claim 35 is based on claim 33 or 3
The reclosable packaging bag according to item 4, is characterized in that the reclosable packaging bag has resistance to heating in a microwave oven.

In this case, for example, a sponge or a bread can be prepared by adding water together with powder mix or the like premixed in a packaging bag and heating the mixture in a microwave oven or the like. At this time, the fastener portion functions as a steam vent. Further, the cake and the like can be formed into a desired shape by the sleeve simply by heating in a microwave oven.

[0052]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the reclosable packaging bag according to the present invention is applied to a self-supporting reclosable packaging bag for a retort. This self-supporting reclosable packaging bag 10 has two sheets forming both sides. Packaging bag body 14 formed of film packaging materials 11 and 12 and film packaging material 13 forming a bottom portion, and packaging bag body 14
And a linear fastener 15 joined to the inner surface of the open end of the.

In the packaging bag body 14, the bottom film wrapping material 13 is folded in two, and the double-folded film wrapping material 13 is put in the folded portion 13a first, and then the double-sided film wrapping material 11 is formed.
12 between the film packaging materials 11 and 12 to heat-seal both sides of the film packaging materials 11 and 12 to form side heat-sealing portions 16 and 16, and heat seal the lower end portions of the film packaging materials 11 and 12 to heat the lower end portions. It is made by forming the seal portion 17.

As the film packaging materials 11, 12, and 13, for example, multilayer films having the same structure can be used. Specifically, the biaxially stretched nylon film, the aluminum foil, and the non-stretched polypropylene film may be sequentially arranged from the outer side to the inner side of the packaging bag.
The biaxially stretched nylon film and the aluminum foil, and the aluminum foil and the non-stretched polypropylene film can be bonded by a dry laminating method using an adhesive. As the adhesive in this case, it is desirable to use, for example, a so-called retort-grade adhesive that clears FDA regulations.

Printing can be performed on the inner surface of the biaxially stretched nylon film (the surface facing the inner surface of the packaging bag). In this case, the printed matter is printed from the outside of the packaging bag through the biaxially stretched nylon film. Can be seen.

Regarding the thickness of the film, for example, the biaxially stretched nylon film may have a thickness of about 15 μm, the aluminum foil may have a thickness of about 7 μm, and the non-stretched polypropylene film may have a thickness of about 70 μm.

When the film packaging material (multilayer film) of the above-mentioned material is used, a packaging bag suitable as a three-dimensional retort pouch suitable for the conventional use of cans can be obtained. Specific applications include pet food,
Cat foods, canned foods, and retort foods in general are listed.

As the film packaging materials 11, 12, and 13, a biaxially stretched nylon film with a transparent inorganic vapor deposition film and a non-stretched polypropylene film may be sequentially arranged from the outside to the inside of the packaging bag. In this case, the biaxially stretched nylon film with the transparent inorganic vapor deposition film is arranged so that the transparent inorganic vapor deposition film formed on the biaxially stretched nylon film with the transparent inorganic vapor deposition film faces the inside of the packaging bag.

Alternatively, the film packaging materials 11, 12,
As 13, a biaxially stretched polyethylene terephthalate film with a transparent inorganic vapor deposition film and a non-stretched polypropylene film may be sequentially arranged from the outside to the inside of the packaging bag. In this case, the biaxially stretched polyethylene terephthalate film with the transparent inorganic vapor deposition film is arranged so that the transparent inorganic vapor deposition film formed on the biaxially stretched polyethylene terephthalate film with the transparent inorganic vapor deposition film faces the inside of the packaging bag.

In this case, the printed matter can be visually recognized from the outside of the packaging bag by printing on the inner surface of the film with the transparent inorganic vapor deposition film (the surface facing the inner surface of the packaging bag).

The transparent inorganic vapor-deposited film-coated film and the non-stretched polypropylene film can be bonded by a dry laminating method using an adhesive. As the adhesive in this case, it is desirable to use, for example, a so-called retort grade adhesive that has cleared FDA regulations.

When a film packaging material (multilayer film) obtained by laminating a film with a transparent inorganic vapor deposition film and an unstretched polypropylene film in this way is used, a transparent packaging bag can be obtained. Therefore, it is possible to obtain a packaging bag suitable for applications in which a glass bottle is conventionally used as a container. Specific examples thereof include use of liquid seasonings, jam, marmalade, ketchup as containers, and the like.

Further, since such a film packaging material (multilayer film) withstands the use of a microwave oven, it can be used for the purpose of heating the foodstuff in the packaging bag in the microwave oven. Specifically, it may be used as a pasta sauce or soup container.

Instead of the transparent inorganic vapor deposition film provided film, an aluminum vapor deposition film provided film may be used. For example, a configuration in which the above transparent inorganic vapor deposition film is replaced with an aluminum vapor deposition film can be adopted.

As shown in FIG. 2, the linear fastener 15 is composed of a female fastener portion 18 and a male fastener portion 19. As shown in FIG. 1, the linear fastener 15 is formed along the opening of the packaging bag body 14, and the length of the linear fastener 15 is from the width of the packaging bag body 14 to the side heat seal portion 16. , 16 excluding the total width.

The female type fastener portion 18 and the male type fastener portion 19 of the linear fastener 15 are formed by accommodating square contents or rectangular contents in the self-standing reclosable packaging bag 10. In order to facilitate the formation of a square package or a rectangular package along the square contents or the rectangular contents, it is preferable to form notches in the bendable portions or to form the easy-folding portions. In addition, it is preferable to form thin portions at both ends of the female fastener portion 18 and the male fastener portion 19 of the linear fastener 15.

FIG. 2 is a view showing an example in which the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are joined to the packaging bag body 14 at the stage of forming the packaging bag body 14. The female type fastener portion 18 and the male type fastener portion 19 are respectively coupled to the folded upper end portions 11a and 12a of the upper end portion of the packaging bag body 14 where the film packaging materials 11 and 12 are not joined.

That is, the unbonded portions 11a and 12a of the film packaging materials 11 and 12 are bent 90 degrees in directions away from each other, and the bent upper ends 11a and 12a are formed on the linear fastener forming dies 20 and 21 shown in FIG. By setting and injecting a synthetic resin such as polyethylene resin in a molten state from the gate opening 22 of the molding die 21 through the runner 23 into the molding space by the insert injection molding means, the female fastener part 18 and the male fastener part 19 are formed. It is joined to the inner surfaces of the bent upper ends 11a and 12a. In this case, the female fastener part 18 and the male fastener part 19
Is a side heat seal part 1 that is heat sealed in a later step.
The total width of 6, 16 is formed with a width narrower than the entire width of the packaging bag body 14.

FIG. 4 shows an example in which the female fastener portion 18 and the male fastener portion 19 constituting the linear fastener 15 are joined to the film packaging material 30 before the packaging bag body 14 is molded.

That is, as shown in FIG. 4, the female fastener portion 18 and the male fastener portion 19 are inserted into the roll-shaped film packaging material 30 set in the linear fastener molding dies 31 and 32 by insert injection molding means. As a result, a synthetic resin such as polyethylene resin is injected from the gate opening 33 of the molding die 32 through the runner 34 into the molding space in a molten state to be bonded to one surface of the film packaging material 30 at a predetermined interval. In this case, the female fastener portion 18 and the male fastener portion 19 that form the linear fastener 15 are not the entire width L of the packaging bag body 14 to be molded,
The side heat seal portion 16 which is heat sealed in the subsequent process,
The total width of 16 is formed to be narrower than the total width L of the packaging bag body 14.

Next, a method of manufacturing the self-supporting reclosable packaging bag 10 will be described.

First, the film packaging materials 11 and 12 forming both sides of the packaging bag body 14 and the film packaging material 1 forming the bottom portion.
Prepare 3 film packaging materials of 3.

Next, the film packaging material 13 forming the bottom portion
1. A film packaging material 1 in which the film packaging material 13 is folded in two and the two folded film packaging materials 13 are overlapped with the folded portion 13a facing upward.
The film wrapping material 1 is arranged below between 1 and 12.
The lower end portions 1 and 12 are heat-sealed together with the film packaging material 13 to form the lower end heat-sealed portion 17.

Next, the upper end portion 1 of the film packaging materials 11 and 12 of the packaging bag body 14 in which the lower end heat seal portion 17 is formed.
Bend 1a and 12a at 90 degrees in directions away from each other. The bent upper ends 11a and 12a are set in the linear fastener molds 20 and 21, as shown in FIG.

Synthetic resin such as polyethylene resin or polypropylene resin is applied to the bent upper end portions 11a and 12a set in the linear fastener molding dies 20 and 21 from the gate port 22 of the molding die 21 by the insert injection molding means to the runner 23. Is injected into the molding space in a molten state. The synthetic resin injected into the molding space in a molten state is cooled in the molding space, and the linear fastener 15
Female fastener section 18 and male fastener section 1 that make up the
9 are molded and joined to the inner surfaces of the upper end portions 11a and 12a of the packaging bag body 14, respectively. The female fastener portion 18 and the male fastener portion 19 are set to have a length narrower than the total width of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16.

The folded upper end portion 1 of the packaging bag body 14 in which the female type fastener portion 18 and the male type fastener portion 19 are molded.
1a and 12a are joined so that the female fastener portion 18 and the male fastener portion 19 are engaged with each other, and the joined film wrapping materials 11 and 12 are heat-sealed on both side portions so that the side heat-sealing portions 16 and 16 are joined together. Form. This allows
The self-supporting reclosable packaging bag 10 is molded.

Next, a method of manufacturing the three-way sealed reclosable packaging bag will be described.

First, the roll-shaped film packaging material 30 is prepared, and the film packaging material 30 fed out from the roll-shaped film packaging material 30 is fed into the linear fastener molding die 3 shown in FIG.
Set to 1,32.

Next, a synthetic resin such as polyethylene resin is injected in a molten state into the molding space from the gate opening 33 of the molding die 32 through the runner 34 by the insert injection molding means, and the female fastener portion 18 and the male fastener portion 19 are injected. And are formed on one surface of the film packaging material 30 at predetermined intervals. The length of each of the female fastener portion 18 and the male fastener portion 19 is smaller than the total width L of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16.

As shown in FIG. 5, the film packaging material 30 in which the female fastener portion 18 and the male fastener portion 19 are fixed is cut at an interval C corresponding to the width L of the packaging bag body 14 to be molded. It As shown in FIG. 6, the cut film packaging material 30 has a female fastener portion 18 and a male fastener portion 19 on the end side, respectively. The cut film packaging material 30 is folded in two at an intermediate position so that the female fastener portion 18 and the male fastener portion 19 are engaged with each other.

The film packaging material 30 folded in two is heat-sealed on both sides so that the side heat-sealing portions 16,
16 is formed. As a result, a three-way sealed reclosable packaging bag is formed.

A method of manufacturing a four-way sealed reclosable packaging bag will be described.

First, forming both sides of the reclosable packaging bag 2
The film packaging materials 11 and 12 of 1 sheet are prepared, these film packaging materials 11 and 12 are piled up, and film packaging materials 11 and 12
The lower end portion of is heat-sealed to form the lower end heat-sealed portion 17.

Next, the packaging bag main body 14 having the lower end heat-sealed portion 17 formed thereon has the upper end portion 1 which is not bonded to each other.
1a and 12a are bent 90 degrees in a direction away from each other. The folded upper ends 11a, 1 of the packaging bag body 14
2a is set in the linear fastener molds 20 and 21 shown in FIG.

Synthetic resin such as polyethylene resin is applied to the upper end portions 11a and 12a set in the linear fastener molds 20 and 21 from the gate port 22 of the mold 21 through the runner 23 into the molding space by the insert injection molding means. It is injected in the molten state. As a result, the female fastener portion 18 and the male fastener portion 19 are molded on the inner surfaces of the folded upper end portions 11a and 12a of the packaging bag body 14, respectively. The lengths of the female fastener portion 18 and the male fastener portion 19 are set to be narrower than the total width of the packaging bag body 14 by the total width of the side heat seal portions 16 and 16.

Next, the bent upper ends 11a, 1
2a is joined to each other so that the female fastener part 18 and the male fastener part 19 coupled to the inner surface are engaged with each other, and heat seal both side parts to form the side heat seal part 1
The reclosable packaging bag is formed by forming 6, 16.

FIG. 10 shows a package in which a reclosable packaging bag is filled with rectangular contents.

The package 40 is, for example, a plurality of rectangular contents (not shown) housed inside the three-way seal type reclosable packaging bag 41 and the three-way seal type reclosable packaging bag 41. It consists of and.

By accommodating the rectangular contents in the three-side sealed reclosable packaging bag 41, the three-side sealed reclosable packaging bag 41 has rectangular contents on both sides and both sides as shown in FIG. It has a shape corresponding to an object, and a flat surface portion is formed in a portion including the side heat seal portion, and accordingly, both surface portions swell. As a result, the three-way seal type reclosable packaging bag 41 has a shape in which the upper end portion 42 including the linear fastener 15 that does not accommodate the rectangular contents protrudes in the width direction from both surface portions.

To form the rectangular package 40 shown in FIG. 10, the upper end portion 42 of the three-way sealed reclosable packaging bag 41 is folded along the upper surface of the rectangular contents as shown in FIG. Since the bent portion 42 has a shape protruding from both surface portions, the protruding portion 43 is bent downward along the side surface of the rectangular contents as shown in FIG. In this case, it is desirable to form an easily bendable portion such as a notch in a portion corresponding to the bending line of the protruding portion 43 of the linear fastener 15 so that the protruding portion 43 can be easily bent.

Next, a reclosable packaging bag according to another embodiment of the present invention will be described in detail below with reference to FIGS. 11 and 12.

This reclosable packaging bag 50 is made up of the packaging bag body 5
4, a linear fastener 55, and a sleeve 60.

The packaging bag main body 54 is formed by folding one sheet of film packaging material in two so that the folding line is located at the lower side, and heat-sealing both sides thereof. That is, the packaging bag main body 54 has an opening at the top and heat seal portions 56, 56 on both sides.

The linear fastener 55 is provided along the opening of the packaging bag main body 54 as in the embodiment shown in FIG. That is, in the vicinity of the opening of the packaging bag body 54, the male fastener portion for the linear fastener 54 is provided on the inner surface of either one of the mutually opposing portions 51 and 52 of the film packaging material forming the packaging bag body 54. Is formed, and a female fastener portion for the linear fastener 54 is formed on the inner surface of the other one. The male and female fastener parts that form the linear fastener 55 are provided in the film packaging material portion excluding the heat seal portions 56, 56.

The sleeve 60 is made of a bendable material such as a polypropylene sheet. Sleeve 6
As the material of 0, it is desirable to use a material that does not cause a problem even if it comes into direct contact with food or the like. Further, by using a bendable material, it is possible to adapt the sheet-shaped sleeve to various shapes. Further, by making the material of the sleeve 60 the same as the material arranged in the innermost layer of the film packaging material, there is an advantage that bonding by thermocompression bonding becomes possible. For example, when the sleeve 60 is made of polypropylene and the polypropylene film is arranged as the innermost layer of the film packaging material, the sleeve 60 and the film packaging material can be bonded at an appropriate site by thermocompression bonding. For this reason, it is possible to avoid the use of an adhesive, which is likely to cause food hygiene problems. By adhering the sleeve and the film packaging material at appropriate portions, the strength of the packaging bag can be increased and the shape of the packaging bag can be appropriately maintained.

The thickness of the sleeve 60 is, for example, 20
It can be set to 0 to 300 μm. The thickness of the sleeve 60 may be set according to the strength and the like required for the packaging bag.

The sleeve 60 is provided such that a pair of opposed front and back surface portions 60a and 60b and both side edges thereof are connected to each other, and a pair of side surface portions 60c having triangular protrusions 60cx and 60dx, respectively. And 60d. The front and back surfaces 50a and 50b have the same rectangular shape. On the other hand, the side surface portions 60c and 60d have the same pentagonal shape, that is, a shape in which a rectangular shape and a shape of an isosceles triangle located at the lower end thereof are combined. As shown in FIG. 12A, the side surface portions 60c, 60
The d has a fold line FL extending in the lengthwise direction at the central portion in the widthwise direction. Therefore, as shown in FIG. 12A, the sleeve 60 has a three-dimensional structure, while the side surface portions 60c and 60d are bent at the bending line F.
As L is moved outward and folded along it, it can be folded flat as shown in FIG. 12 (b).

The sleeve 60 is inserted in the folded state as shown in FIG. 12B so that the tips of the protrusions 60cx and 60dx come into contact with the bottom of the packaging bag body 54.

Sleeve 6 inserted in the main body 54 of the packaging bag
0 is three-dimensionally deformed as shown in FIG. 12 (a), whereby the packaging bag body 54 has a shape shown in FIG. 16 (f) (however, the packaging bag body 7 used in FIG. 16 (f).
4 is different from the packaging bag main body 54 shown in FIG. 11 in having a single side heat seal portion 76).
Maintained at. From such a state, the projections 60cx and 60dx of the sleeve 60 are respectively folded inward together with the packaging bag main body 54, so that the self-supporting shape shown in FIG. 7 is maintained, and the upper portion of the packaging bag main body 54 is shown in FIG. By being folded as shown in FIGS. 9 and 10, the reclosable packaging bag 50 can be transformed into a stackable rectangular parallelepiped shape.

As described above, when the upper portion of the packaging bag body 54 is folded, the linear fastener 55 is also folded according to the rectangular parallelepiped shape provided by the sleeve 60.
In order to facilitate such bending, the linear fastener 55 has a foldable portion 58 as shown in FIG.
a and 59a.

Similar to the embodiment shown in FIG. 2, the linear fastener 55 has a female fastener portion 58 and a male fastener portion 59, but the easy-to-fold portions 58a, 59.
a is a bent portion, that is, the side surface portion 6 of the sleeve 60.
At the positions corresponding to the upper ends of 0c and 60d, the female type fastener portion 58 and the male type fastener portion 59 are partially removed to form flat portions. Therefore, the easy-to-bend portions 58a and 59
In a, since the female type receiving portion and the male type engaging portion as in other portions do not exist and only the flat plate-shaped portion exists, the linear fastener 55 can be bent easily, and The folded portion does not unnaturally project to the outside, and the stackable rectangular parallelepiped shape of the reclosable packaging bag 50 can be beautifully retained.

The easy-to-bend portions 58a and 59a described above.
Is not limited to the above-mentioned form, and for example, a hole is formed by punching or the like in the corresponding bent portion of the female fastener portion 58 and the male fastener portion 59 to facilitate bending in that portion. But it's okay.

Further, a structure in which a notch line is formed in the linear fastener may be adopted as the easily bent portion. In this case, a notch line may be formed along the bending direction. Furthermore, a configuration may be adopted in which the thickness of the linear fastener is thinned as the easy-to-bend portion. That is, in FIG. 13, a part of the female fastener part 58 and the male fastener part 59 is completely removed. However, the bending can be facilitated by forming the material of the fastener part thin at the bent portion. .

The folding part is intended to obtain the easiness of folding the packaging bag as described above, but at the same time, it also functions as a steam vent in the retort process. For example, there has been proposed a product in which a premixed powder mix or the like is enclosed and sold in the packaging bag of the present invention, and a consumer can make a sponge or bread of cake by processing the mixture. That is, once the packaging bag is opened, water is added to the inside of the packaging bag, and then the packaging bag is sealed and heated in a microwave oven, whereby the powder mix can be heated together with water to make sponge or bread. it can.

In this case, it is necessary to remove the steam while applying an appropriate pressure to the inside of the packaging bag, but since the fastener parts are not completely fitted to each other at the bent portion, the sealing property of the packaging bag is moderate. It is relaxed and the fastener part functions as a steam vent. Further, the cake or the like can be formed into a desired shape by the sleeve housed inside the packaging bag only by heating in a microwave oven.

The above-described easy-to-bend portions 58a and 59a may be provided only at the bent portions of the linear fastener 55, and the sealing characteristics of the linear fastener 55 are not significantly deteriorated. However, when the reclosable packaging bag 50 is required to have excellent sealing characteristics, the above-described easy-to-bend portions 58a and 59a are provided with sealing auxiliary means 58b, 58b, 59b and 59b as shown in FIG. Is desirable.

The sealing assisting means comprises a pair of ribs 58b, 58b having a triangular cross section which are integrally formed in the flat portion 58a on the female fastener portion 58 side so as to project toward the male fastener portion 59 side. And male fastener part 5
The flat portion 59a on the 9 side is composed of a pair of ribs 59b, 59b integrally formed so as to project toward the female fastener portion 58 side and having a triangular cross section.
In the sealed state of the linear fastener 55, that is, in the state where the male fastener portion 59 is engaged with the female fastener portion 58, the respective tip portions of the ribs 58b, 58b on the female fastener portion 58 side are the male fastener portion. Rib 59b on the 59 side,
The flat portions 58a, 59 are brought into contact with the respective tip portions of the 59b.
Improves the sealability between a.

The ribs 58b, 58b and 59b described above,
Since the projecting height of 59b is only about half of the depth of the female receiving portion of the female fastener portion 58 and the height of the male engaging portion of the male fastener 59, respectively. The ribs 58b, 58b, 59b, 59b do not hinder the easy bending characteristics of the easy bending portions 58a, 59a.

Incidentally, in FIG. 14, ribs 58b, 58 are provided.
The ribs 58b, 58b are arranged on the outer sides of the female type fastener portion 58 and the male type fastener portion of the male fastener 59 with a space therebetween. And 59b, 59b
Is provided close to the female type receiving portion and the male type engaging portion, a better sealing property can be secured.

The above-mentioned sealing auxiliary means is not limited to the above-mentioned form, and, for example, as shown in FIG.
The sealing assisting means is a flat portion 58 on the female fastener portion 58 side.
a, a pair of ribs 58c, 58c having a trapezoidal cross section integrally formed so as to project toward the male fastener portion 59 side, and the flat portion 5 on the male fastener portion 59 side.
9a, a pair of ribs 59c and 59c having a trapezoidal transverse cross section may be integrally formed so as to project toward the female fastener portion 58 side. In this case, in the sealed state of the linear fastener 55, that is, in the state where the male fastener portion 59 is engaged with the female fastener portion 58, the upper end surface portions of the ribs 58c, 58c on the female fastener portion 58 side are Rib 59 on the side of the mold fastener 59
c, 59c in contact with the lower end surfaces of the flat parts 58a,
The sealing property between 59b is improved.

Next, a method for manufacturing the reclosable packaging bag according to another embodiment of the present invention described above will be described in detail below.

The manufacturing method of the present invention comprises a packaging bag unbonded main body preparing step, a position adjusting folding step, a notching and bending step, a linear fastener forming step, a heat sealing step, and a sleeve inserting step. ing.

In the packaging bag unbonded main body preparation step, the opposite ends of the single film packaging material 70f are overlapped with each other,
Heat sealing is performed over the entire length of the overlapping portion to form the heat sealing portion 76, and thus the unbonded main body for the packaging bag having the open upper and lower ends is formed (FIG. 16 ( See a)).

In the position adjusting and folding step, the unbonded main body for the packaging bag is rotated in the circumferential direction so that the inner edge of the heat seal portion 76 is separated from one side end by a predetermined distance d, and the flat body is folded. It is carried out by (Fig. 16 (b))
reference). This distance d is substantially equal to half the width of the side surface portion 60d of the sleeve 60 used in the sleeve insertion step, that is, the length L shown in FIG. 12 (b).

In the notching and bending step, after the above-mentioned position adjusting folding step, notches CL are formed at the upper ends at both ends of the unbonded main body for a packaging bag, respectively, and then the packaging bag not corresponding to the length of the notch CL is formed. This is performed by bending the upper ends of the joining bodies in directions away from each other to form a pair of bending portions (FIG. 16).
(See (c)).

In the linear fastener forming step, the pair of bent portions are set in the linear fastener molding die, and the linear fastener portion for the linear fastener is attached to the inner surface of the pair of bent portions by the insert injection molding means. It is carried out by molding continuously except for both end portions. Since this linear fastener forming step is the same as the linear fastener forming step in the embodiment shown in FIG. 2, its description is omitted.

In the heat-sealing step, the lower end of the unbonded main body for the packaging bag is heat-sealed over the entire length thereof,
This is performed by forming the lower end heat-sealing portion 77 and heat-sealing only the upper ends at both side ends of the unbonded main body for the packaging bag corresponding to the above-described cut CL (see FIG. 16D). In this way, the packaging bag body 74 is formed.

The sleeve insertion step is carried out by inserting the sleeve 60 into the packaging bag body 74 formed as described above (see FIG. 16 (e)). Since the sleeve 60 is the same as the sleeve described in the embodiment shown in FIGS. 11 and 12, the description thereof will be omitted.

Sleeve 6 inserted in packaging bag body 74
When 0 is three-dimensionally deformed as shown in FIG. 12 (a), the packaging bag main body 74 is maintained in the shape shown in FIG. 16 (f). From such a state, the projections 60cx and 60dx of the sleeve 60 are respectively folded inward together with the packaging bag main body 74, so that the self-supporting shape shown in FIG. 7 is maintained, and the upper portion of the packaging bag main body 74 is shown in FIG. 9 and FIG. 10, the reclosable packaging bag 70 can be transformed into a stackable rectangular parallelepiped shape by being folded in order.

According to the reclosable packaging bag 70 formed as described above, in the position adjusting folding step, the inner edge of the heat-sealing portion 76 has a predetermined distance d from one side end, that is, FIG. Since the unbonded main body for the packaging bag is rotated in the circumferential direction so as to be separated by the length L shown in b), the heat-sealing portion 76 is provided in the rectangular parallelepiped reclosable packaging bag 70.
The heat seal portion 76 is not conspicuous and can be kept beautiful on the side surface of the reclosable packaging bag 70.

When the demand for improving the appearance is not strict, the step of rotating the unbonded main body for the packaging bag in the circumferential direction may be omitted in the above-mentioned manufacturing method. When this step is omitted, the heat seal portion is located at the center of the side surface of the rectangular parallelepiped reclosable packaging bag.

Next, another method for manufacturing the reclosable packaging bag according to another embodiment of the present invention will be described in detail below.

Another manufacturing method of the present invention comprises a film packaging material bending step, a sleeve arranging step, a slitting and bending step, a linear fastener forming step, and a heat sealing step.

The film packaging material folding step is performed by folding the single film packaging material 80f in two and preparing the unbonded main body for the packaging bag in which the upper and lower ends and one side end are not bonded to each other.

The sleeve arranging step is performed by arranging the sleeve 60 in the unbonded main body for the packaging bag (see FIG. 17 (a)). The sleeve 60 may be temporarily fixed to the unbonded main body for the packaging bag by an adhesive means such as hot melt. Since the sleeve 60 is the same as the sleeve described in the embodiment shown in FIGS. 11 and 12, the description thereof will be omitted.

In the notching and bending process, a notch is formed at the upper end at one end of the unbonded body for a packaging bag, and then the upper ends of the unbonded body for a packaging bag corresponding to the length of the notches are mutually separated in a direction away from each other. It is performed by bending and forming a pair of folding parts.

In the linear fastener forming step, the pair of bent portions are set in the linear fastener molding die, and the linear fastener portion for the linear fastener is attached to the inner surface of the pair of bent portions by insert injection molding means. It is carried out by molding continuously except for both end portions. Since this linear fastener forming step is the same as the linear fastener forming step in the embodiment shown in FIG. 2, its description is omitted.

In the heat-sealing step, the lower end of the unbonded body for the packaging bag is heat-sealed over the entire length thereof,
While forming the lower end heat seal part 87, the other side end is heat sealed over the entire length direction to form the side part heat seal part 86, and further, the unbonded main body of the packaging bag corresponding to the above-mentioned cut is formed. This is performed by heat-sealing only the upper ends of the one side ends (see FIG. 17B). In this way, the packaging bag body 84
Is formed.

Sleeve 6 inserted in the packaging bag body 84
By three-dimensionally deforming 0 as shown in FIG. 12 (a), the packaging bag main body 84 is maintained in the shape shown in FIG. 17 (c). From such a state, the projections 60cx and 60dx of the sleeve 60 are respectively folded inward together with the packaging bag main body 84, so that the self-supporting shape shown in FIG. 7 is maintained, and the upper portion of the packaging bag main body 84 is shown in FIG. 9 and FIG. 10, the reclosable packaging bag 80 can be transformed into a stackable rectangular parallelepiped shape by being sequentially folded.

In the above-described method for manufacturing the reclosable packaging bag, if a coextruded film having heat sealing properties on both sides is used as the film packaging material, a three-dimensional reclosable packaging bag can be easily obtained. By applying heat treatment,
It is possible to prevent the heat seal portion from rising.
Therefore, the appearance of the three-dimensional reclosable packaging bag can be kept beautiful, and when the packaging bag is displayed on a display shelf or the like, the packaging bag is disturbed due to being caught in the heat-sealing portion with other packaging bags. And can be prevented from falling.

Further, in the above-mentioned embodiments, the sleeve has been described as having the shape shown in FIG. 12, but the sleeve is not limited to this shape, and the packaging bag body can be held in a predetermined shape. If so, its shape is arbitrary.

The present invention also includes a reclosable packaging bag for solving the problem of improving stacking characteristics. This reclosable packaging bag is provided in the packaging bag body, provided that it has a packaging bag body having an opening and a heat-sealing portion, and a linear fastener provided in the opening of the packaging bag body. The packaging bag body is further provided with a sleeve, and the packaging bag main body is folded according to a predetermined three-dimensional shape limited by the sleeve and is held in the predetermined three-dimensional shape.

Therefore, in the reclosable packaging bag of the present invention, it is not necessary to form the linear fastener by using the insert injection molding means as in the above-described embodiment, and for example, the linear fastener formed separately is not necessary. The fastener may be attached to the packaging bag body at a predetermined position, heat-sealed at the same time as heat sealing, or attached to the packaging bag body by any other fixing means. In this case, as in the above-described embodiment, it is desirable to provide thin-walled portions at both ends of the linear fastener, or to provide easily bendable portions at the bent portions, but particularly, strict requirements are imposed on the appearance. If not, the reclosable packaging bag does not necessarily have to have such a feature.

In the above-described embodiment of the present invention, each of the protrusions 60cx and 60dx of the sleeve 60 comes into contact with the bottom portions of the packaging bag bodies 54, 74 and 84 to cause the packaging bag body 5 to move.
It has a function of maintaining the predetermined position of the sleeve 60 in the parts 4, 74, 84. If the body of the packaging bag has such an effect, the protrusions 60cx, 60dx of the sleeve
Is not necessary. Regarding this type of reclosable packaging bag, another embodiment of the present invention will be described below with reference to FIGS. 18 and 19.

The resealable packaging bag 90 includes a packaging bag body 94.
And a linear fastener 95 and a sleeve 60M1.

The facing portions 91 and 92 and the heat seal portions 91 and 92 of the packaging bag body 94 of the reclosable packaging bag 90 shown in FIG. 18 are the packaging bag body of the reclosable packaging bag 50 shown in FIG. Opposing portions 51 and 52 of 54
And heat seal parts 56, 56, respectively. Each of the heat seal parts 96, 96 is provided with a stopper part 96a at the bottom thereof. The stopper portions 96a, 96a are opposed to each other as shown in FIG. 18, and as a result, the both side ends of the lower portion of the sleeve 60M1 are stopped by the stopper portion 96a.
a, 96a. Stoppers 96a, 9
Each of the portions 6a is formed by increasing the width of the lower portion of the heat seal portion 96, as shown in FIG. The stopper portions 96a, 96a are provided in the packaging bag body 94.
8 has an action of keeping the sleeve 60M1 in a predetermined position in the packaging bag body 94 so that the lower part of the sleeve can be easily folded into the shape shown in FIG. Therefore, unlike the sleeve 60 described above, the sleeve 60M1 does not have a protrusion.

The stopper portion 96a is preferably formed on each of the heat seal portions 96, 96 as shown in FIG. However, the heat seal parts 96, 96
A single stopper portion may be formed on either one of the above. As shown in FIG. 19B, it is possible to form the stopper portion 96a by partially increasing the width of the lower portion of the heat seal portion 96 and providing the small protrusion 96b. The reclosable packaging bag 90 is three-dimensionalized into the shape shown in FIG. 8 by the same method as described above.

FIG. 20 shows the sleeve 60M shown in FIG.
The modification 60M2 of No. 1 is shown. Deformed sleeve 60M
2 is a pair of bendable reinforcing flaps 60cy and 60d
have y. That is, the sleeve 60M2 is composed of a pair of opposed front and back surface portions 60a and 60b, and a pair of side surface portions 60c and 60d which connect both side edges of these to each other. The reinforcing flaps 60cy and 60dy are integrally formed at the upper ends of the side surface portions 60c and 60d of the sleeve so as to project upward. Figure 20
(A) is a sleeve 60M2 folded into a flat state
Indicates. The shape of the sleeve 60M2 folded in such a flat state is changed to a square shape by expanding the side surface portions 60c and 60d. The side portion 60c,
It is preferable to provide reinforcing flaps 60cy and 60dy on 60d, respectively. However, the side portion 60c,
It is also possible to provide a single reinforcing flap on one side of 60d.

FIG. 21 shows the sleeve 60M shown in FIG.
The other modification 60M3 of 2 is shown. The sleeve 60M3 is
It is identical to the sleeve 60M2 except that it has a removable portion 60dy. Therefore, the same reference numerals are given to the same components, and the description of those components will be omitted. The portion 60dy is shown in FIG.
As shown in FIG. 7, a lid of the sleeve 60M2 can be configured, and is formed by increasing the length of the reinforcing flap 60dy. The length of the portion 60dy is substantially the same as the width of the surface portion 60a. Part 60 dy
21 can be opened and closed so that its tip end is placed on the reinforcing flap 60cy as shown in FIG. 21 (b).
With such a structure, the strength of the expanded sleeve 60M3 can be further improved. The connection line between the portion 60dy and the side surface portion 60d is provided with a cutoff line so that the portion 60dy can be easily separated from the side surface portion 60d. This side portion 60dy has a side surface portion 60d.
Finger holes 60dya, 6 for easy separation from
0 dyb is formed.

Instead of the above-mentioned removable portion 60dy, a lid formed separately from the sleeve and having an inverted U-shape for insertion into the sleeve may be provided.

In an embodiment of the method of the present invention for making a reclosable packaging bag, the bottom of the reclosable packaging bag having the shape of a stackable rectangular parallelepiped has a flap portion 70a, as shown in FIG. , 70b are formed by bending. Here, if a co-extruded film or the like having a heat-sealing property is used as a film packaging material, it is possible to prevent the flap portions 70a and 70b from projecting downward by applying a simple heat treatment to the bottom of the reclosable packaging bag. .

FIG. 23 and FIG. 24 show the reclosable packaging bag 10.
A modification of the method of forming the bottom portion of 0 will be described. The forming method according to this modification is the flap portion 100 of the packaging bag body 104.
It comprises a step of subjecting a and 100b to a heat-sealing process, and a step of cutting the tip portions of these flap portions.

That is, the flap portion 1 of the packaging bag body 104.
00a is placed on the base 111, and the heat seal head 110 is pressed against the flap portion 100a,
Heat seal is applied. The other flap portion 100b of the packaging bag body 104 is also heat-sealed by the same method. In this way, the heat-sealed flap portions 100a, 100 as shown in FIG.
b is obtained. Next, the tips of the heat-sealed flap portions 100a and 100b are cut as shown in FIG. 24 (a), and the small flap portions 100ax and 100bx are cut.
To form. FIG. 24B is a schematic view showing the reclosable packaging bag 100 in which the shape is changed to a cubic shape. Figure 24
In (b), reference numerals “100x, 100y” indicate upper flap portions of the reclosable packaging bag 100 which are maintained in the folded state. Such a reclosable packaging bag 10
At 0, as shown in FIG. 10, the step of folding the flap portion is not required. Furthermore, the small flap portion 10
0ax and 100bx improve the self-supporting characteristic of the bag 100. However, this small flap portion 100ax, 1
00bx may be folded inward as shown in FIG.

The structure of the packaging bag body of the flexible packaging bag of the present invention can be used as a substitute for a conventionally used paper container or PET bottle. For example,
The universal packaging bag of the present invention can be used as a substitute for paper drinks containing soy sauce, sake, wine, shochu, etc. in general, such as milk and coffee. In this case, a fastener is not always necessary, and a spout or the like may be attached instead. By using the above-mentioned packaging bag, which can also be used as a retort bag, as a container, it exhibits sufficient performance as a substitute for a paper pack or PET in terms of sealing property and the like.

In the present specification, "for retort" means that the contents such as food are heated and pressurized while being sealed in a packaging bag,
Means the use of retort sterilization. The conditions for the retort sterilization include, for example, heating at 125 ° C. for 30 minutes under pressure.

[0147]

As described above, according to the present invention, since the linear fastener is provided by the insert injection molding means except the heat seal portions on both sides of the opening of the packaging bag body, the processing time is shortened and the work is performed. It is possible to improve efficiency.

By disposing a sleeve for holding the packaging bag body in a predetermined shape in the packaging bag body, it is possible to make the packaging bag body three-dimensional easily, and at the same time, it is suitable for the three-dimensional packaging bag body. It is possible to impart sufficient strength and sufficiently withstand the load applied to the stack.

Further, when the linear fastener is provided with the easy-to-fold portion, the packaging bag main body can be easily folded, and the inappropriate protrusion at the folded portion of the linear fastener is avoided, so that the packaging bag main body of the three-dimensional packaging bag is prevented. The appearance can be kept beautiful.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a reclosable packaging bag according to the present invention.

FIG. 2 is a diagram showing a linear fastener of the reclosable packaging bag of FIG.

FIG. 3 is a view showing an example of a method for forming the linear fastener of FIG.

FIG. 4 is a view showing another example of a method for forming the linear fastener of FIG.

5 is a view showing a linear fastener molded by the linear fastener molding method of FIG.

FIG. 6 is a view showing another embodiment of the reclosable packaging bag according to the present invention.

FIG. 7 is a diagram showing a first stage of a packaging procedure of a reclosable packaging bag containing rectangular contents according to the present invention.

FIG. 8 is a diagram showing a second stage of the packaging procedure of the reclosable packaging bag containing the rectangular contents according to the present invention.

FIG. 9 is a diagram showing a third stage of the packaging procedure of the reclosable packaging bag containing the rectangular contents according to the present invention.

FIG. 10 is a view showing a packaging body in which rectangular contents are contained in a reclosable packaging bag according to the present invention.

FIG. 11 is a plan view of a reclosable packaging bag according to another embodiment of the present invention.

FIG. 12 is a schematic view of a sleeve used in the reclosable packaging bag shown in FIG. 11.

13 is a partial perspective view showing an easy-to-fold portion of the linear fastener of the reclosable packaging bag shown in FIG.

14 is a cross-sectional view showing a sealing auxiliary means provided in the easy-to-fold portion shown in FIG.

FIG. 15 is a cross-sectional view showing a modified example of the sealing auxiliary means shown in FIG.

FIG. 16 is a schematic view showing a manufacturing process of the reclosable packaging bag of the present invention.

FIG. 17 is a schematic view showing another manufacturing process of the reclosable packaging bag of the present invention.

FIG. 18 is a plan view showing still another embodiment of the reclosable packaging bag according to the present invention.

FIG. 19 is a partially enlarged view showing a stopper portion of the reclosable packaging bag of FIG. 18.

20 is a view showing a modified example of the sleeve of FIG.

FIG. 21 is a view showing a modified example of the sleeve of FIG. 20.

FIG. 22 is a perspective view showing an example of a bottom forming method used in the reclosable packaging bag of the present invention.

FIG. 23 is a perspective view showing another example of the bottom forming method used in the reclosable packaging bag of the present invention.

24 is a view showing the bottom of the reclosable packaging bag obtained by the example of the bottom forming method shown in FIG. 23.

FIG. 25 is a plan view of a conventional reclosable packaging bag.

[Explanation of symbols]

10, 50, 70, 80, 90, 100 Self-supporting reclosable packaging bag 11, 12, 13, 51, 52, 70f, 80f Film packaging material 14, 54, 74, 84, 94, 104 Packaging bag body 15, 55,75,85,95 Linear fastener 16,56,76,86,96 Side heat seal part 17,77,87 Lower end heat seal part 18,58 Female type fastener part 19,59 Male type fastener part 30 Film wrapping Material 58a, 59a Easy-to-bend portion 60, 60M1, 60M2 Sleeves 60cx, 60dx Protrusions 60cy, 60dy Bendable reinforcing flaps 96a, 96b Stopper portion

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65D 33/00 B65D 33/00 B 33/25 33/25 AF term (reference) 3E064 AA03 BA30 BA55 BB03 BC08 BC18 EA09 EA30 GA02 HM01 HN13 3E075 AA05 BA46 BB15 CA02 DC43 DC48 DD11 DD45 DE17 GA05 4F100 AB10B AB33B AK01D AK01E AK07C AK42A AK46A BA03 BA05 BA07 BA10A BA10C BA10D BA10E EC18 EC182 EH66B EJ38A GB16 GB23 JL05 JL12D JL12E 4F213 AA04 AA11 AA25 AA29 AD03 AD05 AD08 AD20 AG28 AH54 WA03 WA05 WA12 WA15 WA33 WA38 WA43 WA54 WA60 WA63 WB01 WB02 WB11 WB13 WE06 WE07 WE16 WF01 WF05 WK03 WW06 WW15 WW23

Claims (35)

[Claims] 1. A reclosable packaging bag comprising a packaging bag body having an opening and a heat seal portion, and a linear fastener provided at the opening of the packaging bag body, wherein the packaging bag body is made of a multilayer film. A reclosable packaging bag, wherein the linear fastener is formed along the opening of the packaging bag main body by insert injection molding means and excluding the heat seal portion. 2. The reclosable film according to claim 1, wherein the multilayer film has at least a biaxially stretched nylon film, an aluminum foil and an unstretched polypropylene film, which are sequentially arranged from the outer side to the inner side. Flexible packaging bag. 3. The biaxially stretched nylon film with an aluminum vapor deposition film and a non-stretched polypropylene film, wherein the multilayer film has at least an aluminum vapor deposition film and an unstretched polypropylene film, which are sequentially arranged from the outer side to the inner side. The reclosable packaging bag according to claim 1, wherein the biaxially stretched nylon film with an aluminum vapor deposition film is arranged so that the aluminum film formed on the inner surface of the multilayer film faces the inside of the multilayer film. 4. The biaxially stretched polyethylene terephthalate film with an aluminum vapor deposition film and an unstretched polypropylene film, which are arranged in order from the outside to the inside, of the multilayer film, and the biaxially stretched polyethylene with an aluminum vapor deposition film. The reclosable packaging bag according to claim 1, wherein the biaxially stretched polyethylene terephthalate film with the aluminum vapor deposition film is arranged so that the aluminum film formed on the terephthalate film faces the inside of the multilayer film. . 5. The transparent inorganic vapor-deposited film-attached film 2 is arranged at least in order from the outside to the inside of the multilayer film.
A biaxially stretched nylon film and an unstretched polypropylene film, wherein the transparent inorganic vapor deposition film formed on the biaxially stretched nylon film with the transparent inorganic vapor deposition film faces the inner side of the multilayer film. The reclosable packaging bag according to claim 1, wherein a stretched nylon film is arranged. 6. The transparent inorganic vapor deposition film-provided film 2 arranged at least in order from the outside to the inside of the multilayer film.
An axially stretched polyethylene terephthalate film and an unstretched polypropylene film are provided, and the transparent inorganic vapor deposition film formed on the biaxially stretched polyethylene terephthalate film with the transparent inorganic vapor deposition film faces the inside of the multilayer film. Two
The reclosable packaging bag according to claim 1, wherein an axially stretched polyethylene terephthalate film is arranged. 7. The heat seal part is provided on both sides of the packaging bag body.
The reclosable packaging bag according to any one of 1. 8. The resealing device according to claim 1, wherein the heat seal portion is provided on one of a pair of opposing surfaces of the packaging bag body. Flexible packaging bag. 9. The reclosable packaging bag according to claim 8, wherein the heat seal portion is provided in the center of either one of the pair of facing surfaces. 10. The re-packaging device according to claim 1, further comprising a sleeve that is disposed inside the packaging bag body and holds the packaging bag body in a predetermined shape. Flexible packaging bag. 11. The reclosable packaging bag according to claim 10, wherein the sleeve is foldable. 12. The reclosable package according to claim 10, wherein the sleeve has a foldable protrusion that can come into contact with the bottom of the packaging bag body. bag. 13. The sleeve has at least one foldable reinforcing flap positioned on the opening side of the packaging bag body.
The reclosable packaging bag according to any one of 2 above. 14. The sleeve has a removable portion, the removable portion being accessible when the reclosable packaging bag is opened and when removed. The reclosable packaging bag according to any one of claims 10 to 13, wherein the sleeve is deformable so as to be released from the predetermined shape in which the packaging bag body is held. . 15. The reclosable packaging bag according to claim 14, wherein the removable portion has a finger hole for facilitating its removal. 16. The packaging bag body is folded according to the predetermined shape, and the linear fastener is provided with a foldable portion for facilitating folding of the packaging bag body. The reclosable packaging bag according to any one of claims 10 to 15. 17. The reclosable packaging bag according to claim 16, wherein the foldable portion is provided by forming a cutout line in the linear fastener. 18. The reclosable packaging bag according to claim 16, wherein the easy-to-bend portion is provided by forming the linear fastener in a predetermined area thin. 19. The linear fastener includes a female fastener portion and a male fastener portion engageable with the female fastener portion, and the easy-bending portion includes the female fastener portion and the male fastener portion. 17. The reclosable packaging bag according to claim 16, wherein the reclosable packaging bag is composed of flat portions obtained by removing each of the flat portions. 20. The reclosable packaging bag according to claim 19, wherein the flat portions have sealing assisting means for contacting each other and sealing the space between the flat portions. 21. The packaging bag body according to claim 10, further comprising at least one stopper portion for positioning the sleeve.
A reclosable packaging bag according to item. 22. A reclosable packaging bag comprising a packaging bag body having an opening and a heat-sealing portion, and a linear fastener provided in the opening of the packaging bag body, the reclosable packaging bag being disposed in the packaging bag body. The packaging bag body is folded in conformity with a predetermined three-dimensional shape defined by the sleeve and is held in conformity with the predetermined three-dimensional shape, and the packaging bag body is formed of a multilayer film. A resealable packaging bag characterized by being used. 23. The reclosable packaging bag according to claim 1, wherein the reclosable packaging bag is a retort packaging bag. 24. The linear fastener parts are formed at predetermined positions of the film packaging material on which the linear fasteners are to be provided by means of insert injection molding means, and the film packaging material is molded with the linear fastener parts. Are folded in two so as to mesh with each other, and heat-sealed both sides of the folded film packaging material to form side heat-sealing portions, wherein the packaging bag body is formed of a multilayer film. A method for manufacturing a reclosable packaging bag, which is characterized by: 25. A linear fastener portion is continuously molded at a predetermined position of a roll-shaped film packaging material on which a linear fastener is to be provided by insert injection molding means at intervals from each other. The material is cut into independent film packaging materials, the film packaging material is folded in two so that the linear fastener portions engage with each other, and the two sides of the folded film packaging material are heat-sealed to form side portions. A method of manufacturing a reclosable packaging bag, comprising the step of forming a heat-sealed portion, wherein the packaging bag body is formed of a multilayer film. 26. The method of manufacturing a reclosable packaging bag according to claim 24 or 25, wherein the linear fastener is continuously molded except for the side heat seal portion. 27. A single film packaging material is folded in two,
An unbonded main body for a packaging bag whose upper end and both side ends are not bonded to each other is prepared, and the upper ends of the unbonded main body for the packaging bag are mutually bent in a direction away from each other to form a pair of bent portions, and the pair Set the bending portion of the linear fastener forming die, and the linear fastener portion for the linear fastener 1 is continuously formed on the inner surfaces of the pair of bending portions except the both end portions by the insert injection molding means. The packaging bag main body is formed of a multilayer film, and the reclosable packaging is characterized in that both sides of the unbonded main body for packaging bag are heat-sealed over the entire length thereof. Bag manufacturing method. 28. A single film packaging material is folded in two,
Prepare an unbonded body for packaging bags whose upper and lower ends and one side end are not bonded to each other, and form a notch at the upper end at the other side end of the unbonded body for packaging bag, which corresponds to the length of the notch. Bending the upper end of the unbonded body for the packaging bag mutually in a direction away from each other to form a pair of bending portions, and setting the pair of bending portions in a linear fastener forming die for a linear fastener. The linear fastener portion of the, on the inner surface of the pair of bent portions, each is continuously molded by insert injection molding means except both end portions, the lower end of the unbonded main body for the packaging bag and the one side end thereof A step of heat-sealing the whole lengthwise direction and heat-sealing only the upper end of the other side end of the unbonded main body for packaging bag corresponding to the cut. Becomes method of re-enclosed self standing packaging bag the packaging bag body, characterized in that it is formed by a multilayer film. 29. The end portions of a single film packaging material that are opposed to each other are overlapped with each other, and heat sealing is performed over the entire length direction of the overlapped portion to form a heat seal portion,
Thus, prepare an unbonded body for a packaging bag whose upper and lower ends are opened, and fold the unbonded body for a packaging bag flat so that the heat-sealed portion is separated from one side end by a predetermined distance, Notches are formed at the upper ends at both ends of the bag-unbonded body, and the upper ends of the packaging bag-unbonded body corresponding to the length of the notches are bent in directions away from each other to form a pair of bent portions. Formed, set the pair of bent portions to a linear fastener molding die, the linear fastener portion for the linear fastener 1 on the inner surface of the pair of bent portions, except both end portions by insert injection molding means. Continuously molding each, heat-sealing the lower end of the unbonded body for the packaging bag over the entire length thereof, and corresponding to the notch Consists step of heat-sealing each of the upper end only in the two side unbonded body for Sobukuro method of re-enclosed self standing packaging bag the packaging bag body, characterized in that it is formed by a multilayer film. 30. An unbonded main body for a packaging bag, in which upper and lower ends and left and right side ends are not bonded to each other, is prepared by stacking at least two film packaging materials on top of each other, and The upper ends of at least two film packaging materials are mutually bent in directions away from each other to form a pair of bent portions, and the pair of bent portions are set in a linear fastener forming die, and a line for the linear fastener is formed. -Shaped fastener portions are continuously molded on the inner surfaces of the pair of bent portions except for both side end portions by insert injection molding means, and the lower end and the left and right side ends of the unbonded main body for the packaging bag are arranged in the longitudinal direction thereof. A method of manufacturing a reclosable packaging bag, characterized in that the packaging bag body is formed of a multilayer film . 31. The method according to claim 24, further comprising a step of inserting a sleeve for holding the packaging bag body in a predetermined shape into the packaging bag body after the final step. The method for producing a reclosable packaging bag according to item 1. 32. The method according to claim 26, further comprising the step of disposing a sleeve for maintaining the packaging bag body in a predetermined shape in the packaging bag unbonded body. A method of manufacturing a reclosable packaging bag according to item. 33. A reclosable packaging bag comprising a packaging bag body having an opening and a heat-sealing portion, and a linear fastener provided in the opening of the packaging bag body, the reclosable packaging bag being disposed in the packaging bag body. A sleeve for holding the packaging bag body in a predetermined shape, the packaging bag body is formed of a multilayer film, the linear fastener along the opening of the packaging bag body by insert injection molding means, And provided except the heat seal portion, the packaging bag body is folded according to the predetermined shape, the linear fastener is provided with a fold easy portion for facilitating folding of the packaging bag body. The easy-to-bend portion functions as a steam vent that releases steam inside the reclosable packaging bag when the reclosable packaging bag is heated. Re-enclosed self standing packaging bag to. 34. The reclosable packaging bag according to claim 33, wherein the reclosable packaging bag is configured to maintain a predetermined shape by internal pressure when heated. 35. The reclosable packaging bag is resistant to heating in a microwave oven.
Alternatively, the reclosable packaging bag according to 34.