JP2003335376A - Package with atmosphere-improvable tape and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a package with an atmosphere-improvable tape which can employ many kinds of atmospheric improvable substances while the substances do not contaminate the surroundings of the package. <P>SOLUTION: The package 1 with the atmosphere-improvable tape includes a package body 2 and the atmosphere-improvable tape 10. The package body 2 is formed by heat-bonding two overlapping sheets 20 and 21 at their end rims. The body 2 is provided with a lateral heat seat 23 formed by heat-bonding the sheets 20 and 21 to each other, and the tape 10 is heat-bonded inside the package body 2. The tape 10 includes an atmosphere-improvable layer 10A and a thermoplastic resin layer 10B, and the layer 10A has a cross section covered with the layer 10B. The end of the tape 10 in its extending direction is embedded in the lateral heat seal 23 of the sheets 20 and 21. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a package with atmosphere-improving tape and a method for producing a package with atmosphere-improving tape.

[0002]

BACKGROUND ART Conventionally, in order to prevent the oxidation of foods and medicines, the oxygen absorber contained in a small bag is enclosed in the package, and the desiccant contained in a small bag to prevent deterioration of foods and medicines due to moisture absorption. It is generally performed to enclose or to enclose a mildew-proofing agent contained in a pouch to prevent mold of the clothing. As described above, various atmosphere-improving substances are used to keep the inside of various packages in an appropriate state.

However, these oxygen scavengers, desiccants,
When a small bag containing an atmosphere-improving substance such as a mildew proofing agent is placed in the packaging body for packaging the product, if the small bag is not fixed in the packaging bag, it may be mixed with the product and give a feeling of strangeness. In some cases, there is a problem that the substance in the pouch is accidentally eaten or cooked.

Therefore, as a film constituting a package, an oxygen-absorbing film having a multilayer structure of an oxygen-absorbing layer mixed with an oxygen scavenger and a layer made of another thermoplastic resin (JP-A-63) No. 137838) or a desiccant layer containing a desiccant, and a dehumidifying film having a multilayer structure of a layer made of another thermoplastic resin (Japanese Patent Application Laid-Open No. 5-393).
No. 79) has been proposed. In these techniques, the atmosphere improving layers such as the oxygen absorbing layer and the desiccant layer are formed by kneading a deoxidizing agent and a desiccating agent into a predetermined thermoplastic resin, respectively (1). In addition, as the film constituting the package, a film obtained by extruding a thermoplastic resin having an atmosphere-improving property such as deoxidizing property can also be mentioned (2).

[0005]

However, when processing a film having the atmosphere-improving property as described above in (1) and (2), a resin for forming a film having a large size is used. There is a problem that the selection of the atmosphere improving substance is often restricted because the fluidity cannot be made appropriate. Further, when processing the atmosphere improving film as in (1), since it is processed by coextrusion molding of the resin forming the atmosphere improving layer and the other resin, it is possible to bond the above resins together. Adhesive layers with agents may be required. Therefore, considering the combination of the adhesive and the atmosphere-improving substance, there is a further problem that selection of the atmosphere-improving substance becomes more restricted.

In addition, in the package using the film of (1) or (2), the atmosphere improving layer may be exposed to the outside of the package at the cross-section of the film edge. Therefore, when the package is boiled or heated, the atmosphere-improving substance of the atmosphere-improving layer may be eluted from the cross-sectional portion of the film end portion to contaminate the periphery of the package.

It is an object of the present invention to employ a large number of atmosphere improving substances that can be adopted, and to provide a package with an atmosphere improving tape and a method for producing a package with an atmosphere improving tape in which the atmosphere improving substance does not contaminate the periphery of the package. To provide.

[0008]

In order to achieve the above object, the atmosphere-improving tape-equipped package of the present invention is constructed by heat-bonding the edge portions of the superposed sheets together, and venting the contents. A package body with an atmosphere-improving tape, comprising: a package body that shuts off the atmosphere, and an atmosphere-improving tape that is heat-bonded to the inside of the package body and that improves the atmosphere inside the package body. The adhesive tape comprises an atmosphere improving layer containing an atmosphere improving substance, and a thermoplastic resin layer which is heat-bonded to the inner surface of the sheet, and the thermoplastic resin layer has a cross-section covering the atmosphere improving layer, and the atmosphere An end portion in the extending direction of the improved tape is embedded in a heat-bonded portion of the sheet.

Here, examples of the sheet include a laminated sheet formed by laminating a plurality of sheets and a single-layer sheet made of one material. The laminated sheet may have a structure composed of a base material and a sealant. The sealant refers to a sheet on the side where sheets are adhered to each other when a package is manufactured.

For example, in the case of a combination of PET (polyethylene terephthalate) as the base material and polyolefin resin as the sealant, PET / CPP (unstretched polypropylene), PET / LLDPE (linear low density polyethylene), PET / LDPE Laminated sheets such as (low density polyethylene) may be mentioned.

When a combination of ONY (stretched nylon) as the base material and polyolefin resin as the sealant is used, ONY / CPP and ONY / LLDP are used.
Laminated sheets such as E and ONY / LDPE may be mentioned.

Further, in the case of a combination of a PET / ONY two-layer sheet as a base material and a polyolefin resin as a sealant, PET / ONY / CPP and PET / O are used.
Examples include laminated sheets such as NY / LLDPE and PET / ONY / LDPE.

In addition to the combination of the base material and the sealant, ceramic vapor-deposited PET / ONY as the base material, the combination of polyolefin resin as the sealant, ONY / EVOH (ethylene-vinyl alcohol copolymer) as the base material, and the polyolefin as the sealant. Examples include a combination of resin series, a base material PET / ONY / AL (aluminum), and a sealant combination of polyolefin resin. In these cases, examples of the polyolefin resin include CPP, LLDPE, LDPE and the like.

As a combination of the base material and the sealant, in addition to the polyolefin resin as the sealant,
You may use the thing which consists of raw materials of an easily heat-adhesive property or an easy peeling property. For example, EVA (ethylene vinyl acetate), polyolefin-based resin mixed with SBS (styrene-butadiene-styrene) rubber, EPR (ethylene-propylene rubber), or other rubber, a mixture of PP (polypropylene) and PE (polyethylene), etc. Is mentioned.

As the laminated sheet, PP / EVO is used.
A multilayer sheet such as H / PP or PS (polystyrene) / EVOH / PE may also be used. Further, examples of the single-layer sheet include sheets of PS, PP, PE and the like. Examples of PE include LLDPE and LDPE. In addition,
The sheet is a concept including a film having a relatively thin thickness.

The atmosphere-improving layer may be composed of an atmosphere-improving substance, and may be composed of a thermoplastic resin originally containing the atmosphere-improving substance or a composition in which the atmosphere-improving substance is kneaded with the thermoplastic resin. The ones that have been made are listed. Examples of the thermoplastic resin originally containing the atmosphere-improving substance include nanocomposite nylon resin having oxygen absorbability, polyester made of butanediol branched in the molecule, and the like.

When the thermoplastic resin is made by kneading an atmosphere improving substance, the thermoplastic resin is P
Examples include polyolefin resins such as P and PE, PS, and the like. Examples of PE include LLDPE and LDPE, and examples of PP include CPP and the like. Further, to the above-mentioned polyolefin resin, PS or the like, a material made of a raw material having an easily heat-adhesive property or an easily peelable property may be added. For example, as the additive, EVA (ethylene vinyl acetate), a polyolefin-based resin in which SBS (styrene-butadiene-styrene) rubber, EPR (ethylene-propylene rubber) or other rubber is kneaded, PP (polypropylene) and PE
A mixture of (polyethylene) and the like can be mentioned.

As the atmosphere improving substance, oxygen absorbent, volatile antibacterial agent, desiccant, volatile antifungal agent, volatile anti-mite agent, volatile insect repellent, deodorant, volatile anticorrosive agent, volatile agent Examples include sex animal repellents.

Examples of the oxygen absorbent include metal powders of iron, zinc, etc., reducing low-grade oxides of iron such as FeO, FeTiO ₂ , Fe ₂ O ₃ , organic metal complexes, transition metal compounds, ascorbic acid, phenolic substances. , Sulfite, hydrogen sulfite, thiosulfate, oxalate, pyrogallol, catechol, rongalit, vitamin C, nanocomposite nylon resin, butanediol branched polyester, glucose and the like.

Examples of volatile antibacterial agents include isothianoic acid compounds, hinokitiol, bamboo extract oil, perilla extract oil, thiazolyl sulfamide compounds and the like. Examples of the desiccant include calcium oxide, alumina desiccant, silica gel, magnesium salt, zeolite and the like.
Examples of the volatile antifungal agent include organic tin compounds, organic sulfur compounds, chlorine compounds, phenol compounds and thymol.

As the volatile anti-mitic agent, allethrin, tetramethrin, resmethrin, phenotoflamethrin,
Permethrin, cifenotrin, tralomethrin, empentrin, DDVP, phenithione, temephos, diflubenzuron, buprofezin, pyriproxyfen,
Mint oil and the like can be mentioned. Examples of the volatile insect repellent include cresol, o-phenylphenol, parathion, imidazole and the like.

Examples of the deodorant include silica gel, activated alumina, titanium oxide, zinc oxide, carbon black, zeolite and the like. Examples of volatile rust inhibitors include bicyclic benzazole compounds, monocyclic imidazoles, triazoles, rosins, diisopropylammonium nitrite, benzoic acid, cabrilic acid, dicyclohexylammonium nitrite, dicycloammonium carbonate, and nitrite. .

As the volatile animal repellent, pyrethrin,
Rotenone, phthalthrin, allethrin, permethrin,
Cybermethrin, alpha cybermethrin, phenothrin, cifenotrin, menthol, cypress oil,
Examples include cedar oil, hiba oil, dithiocarbamolyl sulfide compounds, cinnamic aldehyde, linalool and the like.

Examples of the thermoplastic resin layer include layers made of polyolefin resin such as PP and PE and PS. Examples of PE include LLDPE and LDPE, and examples of PP include CPP and the like. Further, the above-mentioned polyolefin resin, PS, etc. may be added with a raw material which is easily heat-adhesive or easily peelable. For example, as the additive, EVA (ethylene vinyl acetate), a polyolefin-based resin in which SBS (styrene-butadiene-styrene) rubber, EPR (ethylene-propylene rubber) or other rubber is kneaded, PP (polypropylene) and PE
A mixture of (polyethylene) and the like can be mentioned.

The shape of the atmosphere improving tape is not particularly limited, but is usually a long rectangular shape. Further, as the form of the cross section, the atmosphere improving layer may be a form having a cross section covered with the thermoplastic resin layer, for example, a rectangular atmosphere improving layer is completely covered with the thermoplastic resin layer. Various shapes, such as a circular shape, a circular atmosphere-improving layer, and a donut-shaped thermoplastic resin layer surrounding the atmosphere-improving layer.

Further, the form of the end portion of the atmosphere improving tape is not particularly limited, but for example, the end portion of the tape is formed in a straight line shape, or the end portion of the tape is formed in a semi-arcuate shape. And at least the atmosphere improving layer at the end of the tape is cut out in a semicircular shape.

As a method of producing the atmosphere-improving tape,
Examples of the coextrusion method include a multilayer coextrusion method and a multilayer profile extrusion method. In addition, two sheets, which are thermoplastic resin layers, are formed by extruding a single layer of a resin that serves as an atmosphere improving layer into a tape shape or slitting a wide sheet into a tape shape. A method of sandwiching the two sheets and heat-bonding the two sheets to form an atmosphere-improving tape can be mentioned.

As a method for producing the package with atmosphere improving tape, for example, a long strip-shaped sheet to which the atmosphere improving tape is heat-bonded and a sheet to which the atmosphere improving tape is not heat-bonded are atmosphere-modified. The heat-sensitive tape is overlaid and heat-bonded so that it is on the inside of the sheet that becomes the package,
Examples include a method of forming a bag shape. Further, as a method for mounting the tape, there is a method in which a long strip-shaped sheet in a roll form is unwound, and the atmosphere improving tape is unwound in parallel and heat-bonded.

According to the present invention, the atmosphere improving tape for improving the atmosphere inside the package body is heat-bonded to the inside of the package body, so that the tape having a narrow width can be improved in atmosphere. Since the structure is imparted, there is no problem that it is difficult to make the fluidity of the resin suitable for molding into a film having a large dimension, unlike the prior art. Therefore, there are less restrictions on the selection of the atmosphere-improving substance, so that more atmosphere-improving substances can be employed. In addition, since the thermoplastic resin layer has a cross section that covers the atmosphere improving layer, an adhesive for fixing the atmosphere improving layer and the thermoplastic resin layer is not needed. Therefore, since it is not necessary to consider the combination of the adhesive and the atmosphere improving substance, there is no limitation on the selection of the atmosphere improving substance. Furthermore, since the end portion of the atmosphere improving tape in the extending direction is embedded in the heat-bonded portion of the sheet, the atmosphere improving layer is not exposed to the outside of the package. Therefore, since the atmosphere improving substance does not elute from the atmosphere improving layer,
There is no contamination around the package.

In the atmosphere-improving tape-equipped package of the present invention, it is preferable that a cutout portion is formed at an end portion in the extending direction of the atmosphere-improving tape, in which a central portion is recessed more than an end portion in the width direction. .

According to this, the heat-bonded portion of the sheet that overlaps with the position corresponding to the cutout portion is wrapped around in the thickness direction of the atmosphere improving tape at the end in the extending direction to be heat-bonded. . Therefore, since the end portion of the atmosphere improving tape in the extending direction is closed, the leakage of the atmosphere improving substance from the atmosphere improving layer can be further reduced. Moreover, since the area of the heat-bonded portion between the sheets is increased, the adhesive strength of the heat-bonded portion can be improved and the leakage of the content can be reliably prevented.

In the package with an atmosphere improving tape of the present invention, it is preferable that the notch is formed in a semicircular shape. According to this, the end of the tape in the extending direction is cut out toward the central portion in the width direction of the tape. Here, the atmosphere improving layer is formed in a substantially central portion in the width direction of the tape. Therefore, since the distance of the atmosphere improving layer from the end of the tape in the extending direction is increased, it is possible to further reduce the leakage of the atmosphere improving substance from the atmosphere improving layer.

In the package with atmosphere improving tape of the present invention, it is preferable that the atmosphere improving tape has an adhesive strength between the atmosphere improving layer and the thermoplastic resin layer of 500 g / 15 mm width or more. When the adhesive strength between the atmosphere improving layer and the thermoplastic resin layer is less than 500 g / 15 mm width, peeling may easily occur between the atmosphere improving layer and the thermoplastic resin layer.

The method for producing a package with an atmosphere improving tape according to the present invention comprises a package body which is formed by heat-bonding the edge portions of the superposed sheets to each other and blocks ventilation of the contents, and this package. A method for producing a package with an atmosphere-improving tape, comprising: an atmosphere-improving tape that is heat-bonded to the inside of a body to improve the atmosphere inside the package, wherein the atmosphere-improving tape is provided with notched holes at predetermined intervals. A notch hole forming step for forming, an atmosphere improving tape in which the notch holes are formed at a predetermined interval, a tape adhering step of thermally adhering to one of the stacked sheets, depending on the notch hole forming position,
It is characterized by comprising a sheet adhering step of thermally adhering the superposed sheets to each other, and a sheet cutting step of cutting a thermal adhering portion of the sheets at a position where the notch hole is divided.

According to the present invention as described above, since the heat-bonded portion of the sheet is cut at the position where the notch hole is divided, the end surface portion of the cut sheet is cut from the end surface portion of the notch hole of the atmosphere improving tape. There will be a gap. That is,
Since the end portion of the atmosphere improving tape is embedded in the heat-bonded portion of the sheet, the atmosphere improving layer is not exposed to the outside of the package. Therefore, since the atmosphere improving substance does not elute from the atmosphere improving layer, it is possible to manufacture a package that does not contaminate the periphery of the package.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a package 1 with an atmosphere improving tape according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the atmosphere improving tape 10. The atmosphere-improving tape-equipped packaging body 1 is configured to include a packaging body body 2 that blocks ventilation to the contents, and an atmosphere-improving tape 10. The package body 2 is configured by heat-bonding the edge portions of the two sheets 20, 21 that are overlapped with each other.

The sheets 20 and 21 of the package body 2 are ON
Y (15 μm) / EVOH (12 μm) / LLDPE
A laminated sheet having a three-layer structure (60 μm) is used.
Thermal bonding between these sheets 20 and 21 is performed by L
The LDPE layers are heat-bonded to each other.

Further, one side on the short side where the sheets 20 and 21 of the package body 2 are overlapped is defined as an opening 25. At the side facing the opening 25, the sheets 20 and 21 are heat-bonded to each other to form the vertical heat seal portion 22. The sheets 20 and 21 are heat-bonded to each other on two sides orthogonal to the opening 25 to form a lateral heat seal portion 23. The lateral heat seal portion 23 is provided with an ultrasonic seal portion 24 having a substantially semicircular shape at a portion facing each other and closer to the opening 25.

The atmosphere improving tape 10 is heat-bonded to the inside of the package body 2. Atmosphere improving tape 10
Is heat-bonded to the inner surface of the sheet 21 in parallel with the opening 25. The atmosphere improving tape 10 is shown in detail in FIG.
As shown in, the atmosphere improving layer 10A including the atmosphere improving substance and the thermoplastic resin layer 10B are provided, and the atmosphere improving layer 10A has a cross section covered with the thermoplastic resin layer 10B.

The atmosphere improving layer 10A is formed by kneading PS (polystyrene) and an iron powder oxygen absorber. The thermoplastic resin layer 10B is made of LLDPE (linear low-density polyethylene). The adhesive strength between the atmosphere improving layer 10A and the thermoplastic resin layer 10B is 500 g / 15 m.
m width. The adhesive strength was measured by a 180 ° peeling (T-peeling) with a tensile tester at a pulling speed of 200 mm / min. An average value of sample width: 50 mm, chuck interval: 50 mm, N = 5 was obtained.

A substantially semicircular notch 41 is formed at the end of the atmosphere improving tape 10 in the extending direction. Notch 4
The width of the end surface of No. 1 is smaller than the width of the atmosphere improving tape 10. Further, the extending direction end portion of the atmosphere improving tape 10 is embedded in the lateral heat seal portion 23 and the ultrasonic seal portion 24 of the sheets 20 and 21.

Here, the length of the package 1 with atmosphere improving tape in the vertical direction is L1, the length in the horizontal direction is L2, and the width of the vertical heat seal portion 22 is L3. The length of the diameter portion of the ultrasonic seal portion 24 is D1, the length of the diameter portion of the cutout portion 41 is D2, and the length of the cutout portion 41 in the lateral direction is D3. Further, the thickness of the atmosphere improving tape 10 is T1, the thickness of the atmosphere improving layer 10A is T2, the width of the atmosphere improving tape 10 is W1, and the width W2 of the atmosphere improving layer 10A.
Each of these dimensions can be set arbitrarily within a range that achieves the object of the present invention.

In this embodiment, L1 (200 m
m), L2 (120 mm), L3 (15 mm) D2 (1
7 mm), D3 (8.5 mm), T1 (0.2 mm),
T2 (0.1 mm), W1 (20 mm), W2 (15 m
m).

FIG. 3 shows a package 1 with an atmosphere improving tape.
Manufacturing apparatus 5 is shown. The manufacturing apparatus 5 includes take-up rolls 50, 51, 52 and rolls 53, 54, 55,
56, a punching device 40, a tape sealing device 30,
The ultrasonic sealing device 31, the horizontal sealing device 32, and the vertical sealing device 33 are provided.

The take-up roll 50 rolls the sheet 20 in advance and sends out the sheet 20. The take-up roll 51 rolls the atmosphere improving tape 10 in advance and sends out the atmosphere improving tape 10. The take-up roll 52 is the sheet 21
Is wound in advance and the sheet 21 is sent out. The take-up rolls 50 and 52 need to wind the sheets 20 and 21 so that the sheets 20 and 21 to be wound on the winding rolls 50 and 52 face each other with good adhesiveness. In the case of this embodiment, the LLDPEs of the sheets 20 and 21 face each other. In addition, the winding rolls 50, 51,
52 is a known roll.

The roll 53 supports the sheet 20 from below. The roll 54 supports the sheet 20 from below, and the sheet 20 hangs down by this roll 54.
The roll 55 supports the sheet 20 from above. The roll 56 supports the sheet 21 and the atmosphere improving tape 10 from the lower side. As the rolls 53, 54, 55, 56, known rolls are adopted.

The punching device 40 comprises a punch 40A and a punch receiver 40B, and punches holes in the atmosphere improving tape 10. The punch 40A is capable of forming an elliptical hole. The punch 40A is
The shape and size of the hole to be formed can be changed, and as another shape, the hole can be formed in a polygonal shape such as a circular shape, a triangle, a quadrangle, or a pentagon. Punch punch 4
0B has holes corresponding to the shape and size of the punch 40A, and supports the atmosphere improving tape 10 from the lower side.

The tape sealing device 30 heat seals the atmosphere improving tape 10 on the sheet 21. The tape sealing device 30 includes a seal receiving plate 30A arranged on the upper side.
And a tape seal bar 30B arranged on the lower side. The seal receiving plate 30A presses the atmosphere improving tape 10 against the tape seal bar 30B from the upper side.
The tape seal bar 30B has a heating function and heat-welds the atmosphere improving tape 10 and the sheet 21.

The ultrasonic sealing device 31 is provided with an ultrasonic horn portion 31A and an anvil 31B, and adheres a target object by utilizing heat locally generated by ultrasonic vibration. In addition, the ultrasonic sealing device 31 includes the punching device 4
The sheets 20 and 21 are adhered to each other so as to cover the holes of the atmosphere improving tape 10 formed by No. 0. The ultrasonic horn unit 31A generates ultrasonic vibration. The ultrasonic horn portion 31A has a diameter of 25 mm. The anvil 31B is a conical pedestal with its head cut. The anvil 31B has a large bottom surface to withstand impacts and loads, and can apply axial pressure to the small top surface.

The horizontal seal device 32 is provided with horizontal seal bars 32A and 32B (width: 25 mm) arranged vertically. The horizontal seal bars 32A and 32B heat-seal the sheet 20, the atmosphere improving tape 10 and the sheet 21 which are overlapped with each other to form the lateral heat seal portion 23 of the atmosphere improving tape package 1. Horizontal sealing device 32
Both have a heating function and heat-weld the sheet 20, the atmosphere improving tape 10 and the sheet 21.

The vertical seal device 33 includes vertical seal bars 33A and 33B (width: 15 mm) arranged vertically. The vertical sealing device 33 heat seals the sheet 20 and the sheet 21 that are overlapped with each other to form the vertical heat sealing portion 22 of the package 1 with atmosphere improving tape. Both of the vertical seal bars 33A and 33B have a heating function, and heat-weld the sheets 20 and 21.

First, a method of manufacturing the atmosphere improving tape 10 will be described. The atmosphere improving tape 10 may be manufactured by using the atmosphere improving layer 10A and the thermoplastic resin layer 10
The above-mentioned material constituting B is subjected to multilayer profile extrusion using a multilayer profile extrusion device composed of two single-screw extruders (not shown). With this multi-layer profile extrusion device,
The atmosphere improving tape 10 having the cross-sectional shape as described above is molded. The screw diameters of the single-screw extruders of the multi-layer profile extruder are both 30 mmφ. Further, the atmosphere improving tape 10 is solidified by water cooling.

Next, a method of manufacturing the atmosphere-improving tape package 1 using the manufacturing apparatus 5 shown in FIG. 3 will be described. Figure 4
FIG. 6 is a diagram showing a notched hole forming step of the atmosphere improving tape 10 by the hole forming device 40. FIG. 5 is a diagram showing a tape bonding process of the atmosphere improving tape 10 by the tape sealing device 30. FIG. 6 is a diagram showing a state in which the sheets are overlapped with each other after the tape adhering step. FIG. 7 is a diagram showing an ultrasonic sealing process by the ultrasonic sealing device 31. FIG. 8 shows a horizontal sealing device 32 and a vertical sealing device 33.
It is a figure which shows the sheet bonding process by. FIG. 9 is a diagram showing a sheet cutting step of cutting a sheet along the center of the lateral heat seal portion 23.

First, as shown in FIG. 4, the punching device 40.
Thus, the notch holes 42 are formed in the central portion of the atmosphere improving tape 10 at equal intervals. The size of the notch hole 42 in the width direction of the atmosphere improving tape 10 depends on the atmosphere improving layer 10.
Atmosphere-improving tape 1 which is larger than the size of A in the width direction
It is smaller than the width of 0. Further, the cutout hole 42 has an elliptical shape that is longer in the horizontal direction in the drawing than in the vertical direction in the drawing (cutout hole forming step). In the present embodiment, the punching device 40 uses 120
Notch holes 42 having a diameter of about 17 mmφ are formed in the atmosphere improving tape 10 at intervals of mm.

Next, as shown in FIG. 5, the atmosphere improving tape 1 is placed on the upper side of the sheet 21 by the tape sealing device 30.
Heat seal 0. In this heat sealing, the seal receiving plate 30A (see FIG. 3) presses the atmosphere improving tape 10 against the tape seal bar 30B from above and the tape seal bar 30B (see FIG. 3) heats from below the sheet 21. Is performed (tape bonding step). Further, as shown in FIG. 6, another sheet 20 is superposed on the sheet 21 to which the atmosphere improving tape 10 is adhered (the portion of the roll 55 in FIG. 3).

Next, as shown in FIG. 7, the ultrasonic sealing device 31 covers the periphery of the notch hole 42 of the atmosphere improving tape 10 so as to cover the ultrasonic sealing portion 24 (diameter 25).
mm) is formed. The ultrasonic seal portion 24 is larger than the cutout hole 42. The atmosphere improving tape 10 is sandwiched between the ultrasonic sealing parts 24 to bond the sheets 20 and 21 to each other (ultrasonic sealing step).

Next, as shown in FIG. 8, the horizontal sealing device 3
2, the sheet 20, the atmosphere improving tape 10 and the sheet 21 are heat-welded in the direction orthogonal to the longitudinal direction of the sheets 20 and 21 to heat the lateral heat seal portion 23 (25 m).
m width) is formed at equal intervals. In addition, the vertical sealing device 33 heat-welds the peripheral edges of the sheets 20 and 21 farther from the portion to which the atmosphere improving tape 10 is heat-bonded in the horizontal direction with respect to the longitudinal direction to heat-seal the sheets 20 and 21 to the vertical side. The heat seal portion 22 (15 mm width) is formed (sheet bonding step).

Finally, as shown in FIG. 9, the sheet 20,
A sheet obtained by stacking the atmosphere improving tape 10 and the sheet 21 is cut along the center of the lateral heat seal portion 23 in the width direction and the center of the cutout hole 42 (sheet cutting step). Due to this sheet cutting process, the cutout hole 42
Is a semicircular shape and becomes a notch 41. Further, at the time of actual use, the article to be packaged is put in through the opening 25, and then the opening 25 is sealed by heat sealing or the like.

According to this embodiment as described above, the following effects can be obtained. (1) Since the atmosphere-improving tape 10 is adhered to the inner surface of the sheet 21 so that the atmosphere-improving property is imparted to the narrow tape, it is formed into a film having a large size as in the conventional case. Therefore, there is no problem that it is difficult to make the fluidity of the resin appropriate. Therefore, there are less restrictions on the selection of the atmosphere-improving substance, so that more atmosphere-improving substances can be employed.

(2) Since the atmosphere improving layer 10A has a cross section covered with the thermoplastic resin layer 10B,
There is no need for an adhesive to fix the atmosphere improving layer 10A and the thermoplastic resin layer 10B. Therefore, since it is not necessary to consider the combination of the adhesive and the atmosphere improving substance, there is no limitation on the selection of the atmosphere improving substance.

(3) Since the end portions of the atmosphere improving tape 10 in the extending direction are embedded in the lateral heat seal portions 23 and the ultrasonic seal portions 24 of the sheets 20 and 21,
The atmosphere improving layer 10A is not exposed to the outside of the atmosphere improving tape package 1. Therefore, the atmosphere improving layer 10A
As a result, iron powder, which is an atmosphere-improving substance, does not elute, so that the surroundings of the atmosphere-improving tape-equipped package 1 are not contaminated.

(4) Since the notch 41 is formed by forming the notch hole 42, the extension direction end of the atmosphere improving tape 10 is cut out toward the center portion in the width direction of the atmosphere improving tape 10. become. Atmosphere improving layer 1
0A is formed at a substantially central portion in the width direction of the atmosphere improving tape 10. Therefore, the distance of the atmosphere improving layer 10A from the end of the atmosphere improving tape 10 in the extending direction is increased, so that the leakage of the atmosphere improving substance from the atmosphere improving layer 10A can be further reduced. In addition, since the area of the portion of the sheets 20 and 21 that is heat-bonded by the lateral heat-sealing portion 23 is increased, the adhesive strength of the lateral heat-sealing portion 23 can be improved, and the leakage of the contents can be ensured. It can be prevented.

(5) Since the lateral heat seal portion 23 of each of the sheets 20 and 21 is cut at a position where the cutout hole 42 is divided, the cutout hole 42 of the atmosphere improving tape is cut from the end face portions of the cut sheets 20 and 21. The end faces of will be separated. That is, the extending direction end of the atmosphere improving tape 10 is embedded in the lateral heat seal portion 23 of the sheets 20 and 21, and the atmosphere improving layer 10A is exposed to the outside of the atmosphere improving tape package 1. There is nothing to do. Therefore,
Since the atmosphere-improving substance does not elute from the atmosphere-improving layer 10A, the atmosphere-improving tape-equipped package 1 that does not contaminate the periphery of the package can be manufactured.

The present invention is not limited to the above-described embodiments, and modifications and improvements within the range in which the object of the present invention can be achieved are included in the present invention. For example, the sheets 20 and 21 are ONY / EVOH / LLDP.
Although the laminated sheet of E was adopted, it is not limited to this, and PET / CPP (unstretched polypropylene), PET /
LLDPE (linear low density polyethylene), PET / L
DPE (low density polyethylene), ONY / CPP, O
NY / LLDPE, ONY / LDPE, PET / ON
Y / CPP, PET / ONY / LLDPE, PET / O
A laminated sheet such as NY / LDPE may be used.

As the laminated sheet, PP / EVO is used.
A multilayer sheet such as H / PP or PS (polystyrene) / EVOH / PE may also be used.

In addition, ceramic vapor deposition PET / ONY / P
O (polyolefin resin), PET / ONY / AL
(Aluminum) / PO and the like are also included. In these cases, the polyolefin resin may be CPP, LLDP.
E, LDPE, etc. are mentioned.

Further, as the sheets 20 and 21, in addition to the above-mentioned layer made of PO (polyolefin resin), those made of easily heat-adhesive or easily peelable raw materials may be used. For example, EVA (ethylene vinyl acetate), SBS (styrene-butadiene-
Styrene) rubber, kneaded rubber such as EPR (ethylene-propylene rubber), PP (polypropylene)
And a mixture of PE (polyethylene). Alternatively, the sheets 20 and 21 may be single-layer sheets.
For example, sheets of PS, PP, PE and the like can be mentioned. P
Examples of E include LLDPE and LDPE.

Atmosphere improving layer 1 of atmosphere improving tape 10
In the above embodiment, the atmosphere improving layer 10A is 0A.
Was made by kneading PS (polystyrene) and an iron powder-based oxygen absorber, but is not limited to this and may be any structure that includes an atmosphere improving substance, for example, originally containing an atmosphere improving substance. Examples thereof include those made of a thermoplastic resin and those made by kneading an atmosphere improving substance with the thermoplastic resin. Examples of the thermoplastic resin originally containing the atmosphere-improving substance include nanocomposite nylon resin having oxygen absorbability, polyester made of butanediol branched in the molecule, and the like.

In the case of a constitution in which an atmosphere improving substance is kneaded with a thermoplastic resin, the thermoplastic resin is P
Examples include polyolefin resins such as P and PE. P
As E, LLDPE or LDPE, and as PP, C
PP etc. are mentioned. Further, the above-mentioned polyolefin resin, PS, etc. may be added with a raw material which is easily heat-adhesive or easily peelable. For example, as an additive,
Examples include EVA (ethylene vinyl acetate), polyolefin-based resin mixed with rubber such as SBS (styrene-butadiene-styrene) rubber, EPR (ethylene-propylene rubber), and a mixture of PP (polypropylene) and PE (polyethylene). To be

Further, as the atmosphere improving substance, in addition to the oxygen absorbent, a volatile antibacterial agent, a desiccant, a volatile antifungal agent, a volatile anti-mite agent, a volatile insect repellent, a deodorant, a volatile rust preventive agent. Agents, volatile animal repellents and the like.

As the oxygen absorber, in addition to iron, metal powder such as zinc, reducing low-grade oxide of iron such as FeO, FeTiO ₂ , Fe ₂ O ₃ , organic metal complex, transition metal compound, ascorbic acid, Examples thereof include phenolic substances, sulfites, hydrogen sulfites, thiosulfates, oxalates, pyrogallol, catechol, rongalit, vitamin C, nanocomposite nylon resins, butanediol branched polyesters, and glucose.

Examples of the volatile antibacterial agent include isocyanic acid compounds, hinokitiol, bamboo extract oil, perilla extract oil, thiazolyl sulfamide compound and the like. Examples of the desiccant include calcium oxide, alumina desiccant, silica gel, magnesium salt, zeolite and the like.
Examples of the volatile antifungal agent include organic tin compounds, organic sulfur compounds, chlorine compounds, phenol compounds and thymol.

Volatile anti-mitic agents include allethrin, tetramethrin, resmethrin, phenotoflamethrin,
Permethrin, cifenotrin, tralomethrin, empentrin, DDVP, phenithione, temephos, diflubenzuron, buprofezin, pyriproxyfen,
Mint oil and the like can be mentioned. Examples of the volatile insect repellent include cresol, o-phenylphenol, parathion, imidazole and the like.

Examples of the deodorant include silica gel, activated alumina, titanium oxide, zinc oxide, carbon black, zeolite and the like. Examples of volatile rust inhibitors include bicyclic benzazole compounds, monocyclic imidazoles, triazoles, rosins, diisopropylammonium nitrite, benzoic acid, cabrilic acid, dicyclohexylammonium nitrite, dicycloammonium carbonate, and nitrite. .

As the volatile animal repellent, pyrethrin,
Rotenone, phthalthrin, allethrin, permethrin,
Cybermethrin, alpha cybermethrin, phenothrin, cifenotrin, menthol, cypress oil,
Examples include cedar oil, hiba oil, dithiocarbamolyl sulfide compounds, cinnamic aldehyde, linalool and the like.

The thermoplastic resin layer 10B was made of LLDPE (linear low-density polyethylene), but is not limited to this, and examples thereof include layers made of polyolefin resin such as PP and PE, and PS. As PE, LDP
Examples of E and PP include CPP and the like. Further, the above-mentioned polyolefin resin, PS, etc. may be added with a raw material which is easily heat-adhesive or easily peelable. For example, as the additive, EVA (ethylene vinyl acetate), a polyolefin resin in which SBS (styrene-butadiene-styrene) rubber, EPR (ethylene-propylene rubber) or other rubber is kneaded, PP (polypropylene) and PE ( And a mixture of polyethylene).

As for the cross-sectional form of the atmosphere improving tape 10, the atmosphere improving layer 10A is the thermoplastic resin layer 1
It is only necessary to have a shape having a cross section covered with 0B, and for example, as shown in FIG. 2, a rectangular atmosphere improving layer 10A.
Was completely covered with the thermoplastic resin layer 10B, but the present invention is not limited to this, and the rectangular atmosphere improving layer 10A is covered with the thermoplastic resin layer 10B as shown in FIG. Various shapes such as a shape protruding from the side surface of the thermoplastic resin layer 10B and a shape in which a circular atmosphere improving layer is covered with a donut-shaped thermoplastic resin layer 10B as shown in FIG. The form can be adopted.

Further, regarding the form of the end portion of the atmosphere improving tape 10, as shown in FIG. 1, the portion of the atmosphere improving layer 10A at the end portion of the atmosphere improving tape 10 is cut out in a semicircular shape. However, the present invention is not limited to this, and the end portion of the atmosphere improving tape 10 is formed in a linear shape as shown in FIG. 11, or the end portion of the atmosphere improving tape 10 as shown in FIG. A cutout 41 is formed in the cutout 41, and the cutout 41 is formed in a semicircular shape.

As a method for manufacturing the atmosphere-improving tape-equipped package 1, the atmosphere-improving tape 10 was continuously fed out and heat-bonded onto the sheet 21 as shown in FIGS. , But is not limited to this, as shown in FIG.
A plurality of the atmosphere-improving tapes 10 cut into a predetermined length may be heat-bonded to the sheet 21, and the sheets 20 may be stacked from above. Even in this case, the atmosphere improving layer 1 is formed at the end of the atmosphere improving tape 10 in the extending direction.
0A is embedded in the lateral heat seal portion 23. In addition, the specific structure, shape, and the like when carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[0080]

EXAMPLES The present invention will be described more specifically below with reference to examples and comparative examples. The present invention is not limited to the contents of the embodiment. [Example 1] Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. In the above embodiment, the atmosphere-improving tape 10 and the atmosphere-improving tape-equipped package 1 were manufactured under the following specific conditions.

Atmosphere improving layer 1 of atmosphere improving tape 10
0A is composed of polystyrene (Idemitsu Styrol ET63: manufactured by Idemitsu Petrochemical Co., Ltd.) and an iron powder oxygen absorber (consisting of iron powder having a bulk specific gravity of 2.0 or more and a specific surface area of 0.5 or more and salt). A master batch kneaded in a weight ratio of 40:60 and processed into pellets was used by extrusion. The thermoplastic resin layer 10B is made of LLDPE (Moretech 023).
8CN: Idemitsu Petrochemical Co., Ltd. was used.

[Comparative Example 1] In Comparative Example 1, the atmosphere-improving tape package 1 is the same as in Example 1 except that the atmosphere-improving tape 10 is not perforated by the perforation device 40. Was manufactured. That is, this comparative example 1
The atmosphere-improving tape-equipped package 1 of No. 1 is not modified such that the atmosphere-improving layer 10A is not embedded in the lateral heat seal portion 23 and thermally bonded at the end portion of the atmosphere-improving tape 10 in the extending direction. The end of 10 is exposed to the outside of the package 1 with atmosphere improving tape. Since the end portion of the atmosphere improving tape 10 is exposed to the outside of the package, the atmosphere improving layer 10A and the thermoplastic resin layer 10B were peeled off when the portion was picked up by hand.

Comparative Example 2 A difference from Example 1 is that the atmosphere improving tape 10 is not used. The sheets constituting the package are also different, and the sheet used in Comparative Example 2 has a laminated structure of three layers of outer layer / inner layer / outer layer. This sheet was formed by using a multilayer sheet extruder equipped with two extruders having a screw diameter of 30 mmφ. The resin of the upper and lower outer layers was extruded by one extruder, and the resin of the inner inner layer was extruded by the other extruder. The resin of the outer layer is LL
DPE (Moretech 0238CN: Idemitsu Petrochemical Co., Ltd.)
Manufactured) was used. The resin of the inner layer is polystyrene (Idemitsu Styrol ET63: manufactured by Idemitsu Petrochemical Co., Ltd.) and iron powder oxygen absorber (consisting of iron powder having a specific gravity of 2.0 or more and a specific surface area of 0.5 or more, salt, etc.). However, a master batch which was kneaded at a weight ratio of 40:60 and processed into pellets was used by extrusion. The adhesive strength of the inner layer and the outer layer of this sheet was 500 g / 15 mm width.

[Evaluation Test] 100 ml of water and 2 parts of air were added from the opening side of each package obtained in Example 1 and Comparative Examples 1 and 2.
ml was filled and the opening was heat-bonded with a width of 10 mm to seal the package. The sealed package was heated at 115 ° C. for 40 minutes by boiling, and then the state of the package was confirmed. In Example 1, there was no leakage of iron powder and PS in the atmosphere improving layer,
It was judged to be practical. In Comparative Example 1, the end portion of the tape coincided with the end portion of the package, and therefore PS was eluted from the end portion of the tape, and it was judged to be impractical. In Comparative Example 2, it was judged to be impractical because the layers of the sheet constituting the package were peeled off.

[0085]

According to the present invention, the atmosphere improving tape for improving the atmosphere inside the package body is heat-bonded to the inside of the package body, so that the tape having a narrow width is provided with the atmosphere improving property. Since it has such a structure, there is no problem that it is difficult to make the fluidity of the resin suitable for molding into a film having a large dimension, unlike the conventional case. Therefore, there are less restrictions on the selection of the atmosphere-improving substance, so that more atmosphere-improving substances can be employed. In addition, since the thermoplastic resin layer has a cross section that covers the atmosphere improving layer, an adhesive for fixing the atmosphere improving layer and the thermoplastic resin layer is not needed. Therefore, since it is not necessary to consider the combination of the adhesive and the atmosphere improving substance, there is no limitation on the selection of the atmosphere improving substance. Furthermore, since the end portion of the atmosphere improving tape in the extending direction is embedded in the heat-bonded portion of the sheet, the atmosphere improving layer is not exposed to the outside of the package. Therefore, since the atmosphere improving substance does not elute from the atmosphere improving layer, the surrounding of the package is not contaminated.

[Brief description of drawings]

FIG. 1 is a plan view showing a package with an atmosphere improving tape according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an atmosphere improving tape in the embodiment of FIG.

FIG. 3 is a schematic view of an apparatus for manufacturing a package with an atmosphere improving tape in the embodiment of FIG.

FIG. 4 is a diagram showing a notch hole forming step in the embodiment of FIG.

FIG. 5 is a diagram showing a tape bonding step in the embodiment of FIG.

FIG. 6 is a diagram showing a state in which the sheets are overlapped with each other in the embodiment of FIG.

FIG. 7 is a diagram showing an ultrasonic sealing step in the embodiment of FIG.

FIG. 8 is a diagram showing a sheet bonding step in the embodiment of FIG.

FIG. 9 is a diagram showing a sheet cutting step in the embodiment of FIG.

FIG. 10 is a view showing a modified example of the cross-sectional shape of the atmosphere improving tape.

FIG. 11 is a partial plan view showing a first modified example of the end portion of the atmosphere improving tape.

FIG. 12 is a partial plan view showing a second modified example of the end portion of the atmosphere improving tape.

FIG. 13 is a plan view showing a modified example of the tape bonding step.

[Explanation of symbols]

1 Package with atmosphere improving tape 2 Package body 10 Atmosphere improving tape 10A atmosphere improvement layer 10B thermoplastic resin layer 20, 21 sheets 23 Horizontal heat seal part 41 Notch 42 Notch hole

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65D 81/28 B65D 81/28 BF term (reference) 3E064 AA05 BA24 BA36 BA55 BB03 BC08 BC18 EA18 EA30 HU10 3E067 AB01 AB81 BA12A BB14A BB24A BB25A CA04 CA24 CA30 EA06 EE25 EE28 EE33 FA01 FC01 GB12 GB13 GC07 GC08 GD01 3E075 BA42 CA02 DA03 DA14 DA32 DB03 DB14 DD14 DD45 DD47 DE01 GA05

Claims (5)

[Claims] 1. A packaging body main body which is formed by heat-adhering the edge portions of the superposed sheets to each other and blocks ventilation to the contents, and the inside of the packaging body main body is thermally adhered to the inside thereof. The atmosphere-improving tape-equipped package with an atmosphere-improving tape for improving the atmosphere of, wherein the atmosphere-improving tape is an atmosphere-improving layer containing an atmosphere-improving substance, and a heat for thermally bonding to the inner surface of the sheet. A thermoplastic resin layer, and the thermoplastic resin layer has a cross section that covers the atmosphere improving layer, the extending direction end portion of the atmosphere improving tape is embedded in the heat-bonding portion of the sheet. Atmosphere improving tape-equipped package. 2. The package with atmosphere-improving tape according to claim 1, wherein a cutout portion is formed at an end portion in the extending direction of the atmosphere-improving tape, the cutout portion having a central portion recessed from the end portion in the width direction. Atmosphere-improving tape-equipped package. 3. The package with an atmosphere improving tape according to claim 2, wherein the notch is formed in a semicircular shape. 4. The atmosphere-improving tape-equipped package according to any one of claims 1 to 3, wherein the atmosphere-improving tape has an adhesive strength between the atmosphere-improving layer and the thermoplastic resin layer of 500 g. / 15 mm width or more, a package with an atmosphere improving tape. 5. A package main body which is formed by thermally adhering the edge portions of the superposed sheets to each other and blocks ventilation to the contents, and the inside of the package main body being thermally adhered to the inside of the package body. A method for manufacturing an atmosphere-improving tape-equipped package having an atmosphere-improving tape for improving an atmosphere, wherein a notch hole forming step of forming notch holes in the atmosphere-improving tape at predetermined intervals, and at predetermined intervals A tape bonding step of thermally bonding the atmosphere-improving tape in which the cutout holes are formed to one of the stacked sheets, and a sheet bonding step of thermally bonding the stacked sheets to each other according to the cutout hole forming position, A sheet cutting step of cutting the heat-bonded portion of the sheet at a position where the cutout hole is divided, the method for producing a package with an atmosphere improving tape.