CN112109981B - Package and method for manufacturing same - Google Patents

Package and method for manufacturing same Download PDF

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Publication number
CN112109981B
CN112109981B CN202010552203.7A CN202010552203A CN112109981B CN 112109981 B CN112109981 B CN 112109981B CN 202010552203 A CN202010552203 A CN 202010552203A CN 112109981 B CN112109981 B CN 112109981B
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region
film
package
resin
manufacturing
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CN202010552203.7A
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CN112109981A (en
Inventor
芝正邦
高木直树
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Asahi Kasei Corp
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Asahi Kasei Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/04Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/06Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes
    • B65D75/12Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes with the ends of the tube closed by flattening and heat-sealing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B5/00Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
    • B65B5/02Machines characterised by incorporation of means for making the containers or receptacles
    • B65B5/022Machines characterised by incorporation of means for making the containers or receptacles for making bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B69/00Unpacking of articles or materials, not otherwise provided for
    • B65B69/0033Unpacking of articles or materials, not otherwise provided for by cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38Packaging materials of special type or form
    • B65D65/40Applications of laminates for particular packaging purposes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Package Closures (AREA)

Abstract

The present invention relates to a package and a method for manufacturing the same. The present invention addresses the problem of reducing the possibility of a film having a surface layer portion peeling off and failing to open a package when a sealing portion of a cylindrical package formed by a resin film is cut and opened. A cylindrical package (1) in the form of an envelope pouch has a seal part (10), and the seal part (10) is a first region (P) of a laminated film (P) formed by overlapping two resin film sheets (F)1) And a second region (P)2) Are respectively arranged at the radial outer side and the radial inner side and are sealed in an overlapped state, wherein the sealing part (10) is a first area (P) which is arranged at the radial outer side1) Two sheets of film (F)1A,F1B) And a second region (P) arranged radially inward2) Two films (F)2A,F2B) A radially outer membrane (F) of2A) And welding the components together.

Description

Package and method for manufacturing same
Technical Field
The present invention relates to a package and a method for manufacturing the same.
Background
Various proposals have been made on a cylindrical package formed of a resin film for packaging a content such as a sausage. For example, the following techniques are proposed: the inner surfaces of both edge portions of a film wound in a cylindrical shape are joined to each other in a palm-like state, thereby forming a cylindrical outer skin portion and a seal portion protruding radially outward from the outer skin portion and extending in a longitudinal direction, and the seal portion is laid flat and joined together with the outer skin portion by welding, thereby forming a cylindrical package (see patent document 1). In recent years, a technique has been proposed in which a seal portion formed by joining both edge portions of a film is formed of a specific material to achieve both characteristics of easy-opening property and retort resistance (see patent document 2).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 1-139356
Patent document 1: japanese patent laid-open publication No. 2015-164860
Disclosure of Invention
Problems to be solved by the invention
In addition, in the techniques described in patent documents 1 and 2, so-called high-frequency welding is sometimes used in which welding is performed by sandwiching a portion to be sealed between electrodes and applying an electric field to heat the portion. When such high-frequency welding is employed, when the sealed portion is cut to open the package, only the surface layer portion (the portion located on the outermost side in the radial direction) of the film may be peeled, and the opening may fail.
The present invention has been made in view of the above circumstances, and an object thereof is to reduce the possibility of a failure in opening due to peeling of a surface layer portion of a film when a sealing portion of a cylindrical package formed by resin film formation is cut and opened.
Means for solving the problems
In order to achieve the above object, a package according to the present invention is a tubular package in the form of an envelope bag having a seal portion formed by arranging a first region and a second region of two laminated films, each of which is formed by laminating two resin films, on the radially outer side and the radially inner side, respectively, and sealing the first region and the second region in an overlapped state, wherein the seal portion is formed by welding the two films forming the first region arranged on the radially outer side and one film forming the radially outer side of the two films forming the second region arranged on the radially inner side.
The method for manufacturing a package according to the present invention includes the steps of: a first step of forming a tubular body in the form of an envelope by arranging and overlapping a first region and a second region of a laminated film, which is formed by laminating two resin films, on the radially outer side and the radially inner side, respectively; and a second step of forming a package having a seal portion by sandwiching the first region and the second region overlapped with each other in the first step between an outer electrode disposed on the radially outer side and an inner electrode disposed on the radially inner side and sealing the first region and the second region by high-frequency dielectric heating, wherein the second step is performed by welding the two films constituting the first region disposed on the radially outer side to the one film constituting the second region disposed on the radially inner side, the one film being positioned on the radially outer side, thereby forming the seal portion.
In the case of adopting this configuration and method, the seal portion may be formed by welding the two films constituting the first region disposed radially outside the cylindrical body in the form of an envelope bag to the one film located radially outside of the two films constituting the second region disposed radially inside the cylindrical body. Thus, when the sealed portion is cut to open the package, the film positioned radially outward and the film positioned radially inward of the two films constituting the first region arranged radially outward can be prevented from peeling. As a result, the possibility of unsealing failure can be reduced.
In the package and the method for producing the same of the present invention, a vinylidene chloride film having a thickness of 15 to 25 μm can be used as a resin film.
In the manufacturing method of the present invention, in the second step, the high-frequency dielectric heating may be performed in a state in which the object to be sandwiched, which is not sealed by the high-frequency dielectric heating, is sandwiched between the first region disposed radially outward and the external electrode. In this case, a sandwich having a thickness of 10 to 300 μm may be used.
In the package of the present invention, a region of the laminated film having a predetermined width from an outermost end portion of an edge portion adjacent to the first region disposed radially outward may be a non-sealed portion, and at least one row of through holes disposed at a predetermined interval in a longitudinal direction may be formed in the non-sealed portion. In this case, the region having a width of 4 to 8mm from the outermost end of the edge portion may be used as the non-sealing portion, and the through holes may be arranged at intervals of 3 to 30mm in the longitudinal direction.
In the manufacturing method of the present invention, in the second step, a region of the laminated film having a predetermined width from an extreme end portion of the edge portion close to the first region disposed radially outward may be used as the non-sealing portion. The method may further include a third step of forming at least one row of through holes arranged at a predetermined interval in a longitudinal direction in a portion of the laminated film corresponding to the non-sealing portion. In this case, the region having a width of 4 to 8mm from the outermost end of the edge portion may be used as the non-sealing portion, and the through holes may be arranged at intervals of 3 to 30mm in the longitudinal direction.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, when the sealed portion of the cylindrical package formed of the resin film is cut and opened, the possibility of the surface layer portion of the film peeling off and the opening failure can be reduced.
Drawings
Fig. 1 is a sectional view of a package according to an embodiment of the present invention.
Fig. 2 is a plan view of the package according to the embodiment of the present invention.
Fig. 3 is an enlarged sectional view of a seal portion (portion III in fig. 1) of the package according to the embodiment of the present invention.
Fig. 4 is an explanatory view for explaining a method of manufacturing a package according to the embodiment of the present invention.
Description of the symbols
1 … packaging body
10 … sealing part
20 … non-sealing part
30 … through hole
100 … sandwich
F … resin film
F1A·F1B… two sheets of film forming a first region
F2A·F2B… form the two sheets of film in the second region
P … laminated film
P1… first region
P2… second region
PE1… edge portion proximate to the first region
PA… is formed in a region having a predetermined width from the extreme end of the edge portion close to the first region
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are merely suitable application examples, and the scope of application of the present invention is not limited to these.
First, the structure of the package 1 according to the embodiment of the present invention will be described with reference to fig. 1 to 3. As shown in fig. 1, a package 1 of the present embodiment is a cylindrical package in the form of an envelope bag having a seal portion 10, and the seal portion 10 is a first region P of a laminated film P formed by overlapping two resin film sheets F1And a second region P2Respectively arranged at the radial outer side and the radial inner side and sealed in an overlapped state.
In the present embodiment, as shown in fig. 3 and the like, the first region P is a laminated film P1Using a slave laminated film P having an edge portion PE1Is slightly (width W) at the extreme end1Amount of) as a second region P of the laminated film P2Using the other edge part P of the slave laminated film PE2Is slightly (width W) at the extreme end2Amount of) is greater than a predetermined width. I.e. the first region P1One edge portion P of the laminated film P is not includedE1The region near the edge portion of (1), a second region P2The other edge part P not including the laminated film PE2In the vicinity of the edge portion.
Examples of the resin material constituting the resin film F include polyvinylidene chloride resin, polyvinyl chloride resin, polyester resin (polyethylene terephthalate, etc.), polyamide resin (nylon-6, etc.), polyolefin resin (polyethylene, polypropylene, etc.), and the like. Among these resin materials, the resin film F is preferably formed of a polyvinylidene chloride resin from the viewpoint of oxygen barrier properties and water vapor barrier properties.
The polyvinylidene chloride resin (hereinafter sometimes referred to as "PVDC") may be a homopolymer of vinylidene chloride, but is usually a copolymer of 60 to 98 mass% of vinylidene chloride and 2 to 40 mass% of other monomer copolymerizable with vinylidene chloride. Examples of other monomers copolymerizable with vinylidene chloride include: vinyl chloride; alkyl acrylates (alkyl having 1 to 18 carbon atoms), such as methyl acrylate, ethyl acrylate, butyl acrylate, and lauryl acrylate; alkyl methacrylates (alkyl groups having 1 to 18 carbon atoms) such as methyl methacrylate, butyl methacrylate, and lauryl methacrylate; vinyl cyanides such as acrylonitrile; aromatic vinyl compounds such as styrene; vinyl esters of aliphatic carboxylic acids having 1 to 18 carbon atoms such as vinyl acetate; alkyl vinyl ether having 1 to 18 carbon atoms; vinyl polymerizable unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and fumaric acid; and alkyl esters (including partial esters, in which the number of carbon atoms in the alkyl group is 1 to 18) of vinyl polymerizable unsaturated carboxylic acids such as maleic acid, fumaric acid, and itaconic acid. More preferably at least one selected from vinyl chloride, methyl acrylate or lauryl acrylate. The other monomers copolymerizable with vinylidene chloride may be used alone in 1 kind, or may be used in combination in 2 or more kinds. The copolymerization ratio of the other monomer is more preferably in the range of 3 to 35% by mass, still more preferably 3 to 25% by mass, and particularly preferably 4 to 22% by mass. If the copolymerization ratio of the other monomer is too small, melt processability tends to be lowered, while if it is too large, gas barrier properties tend to be lowered. In addition, in order to improve the melt processability, 2 or more kinds of PVDC may be mixed.
PVDC can be synthesized by any polymerization method such as suspension polymerization, emulsion polymerization, and solution polymerization, and when a composite as a powder resin is formed, it is preferably synthesized by suspension polymerization. In the case of synthesis by the suspension polymerization method as described above, the pulverization step for adjusting the particle size of the powder resin formed of PVDC tends to be unnecessary. The particle size of the powder resin made of PVDC is preferably in the range of 40 μm to 2mm, more preferably in the range of 50 μm to 1mm, and still more preferably in the range of 60 to 700 μm. The particle size of the powder resin is measured, for example, by a dry sieving method using a standard sieve.
The resin material (preferably PVDC) for forming the resin film F may contain, as necessary, various additives such as a heat stabilizer, a plasticizer, a processing aid, a colorant, an ultraviolet absorber, a pH adjuster, and a dispersing aid, which are added for the purpose of improving various properties and molding processability. Examples of the heat stabilizer include epoxy compounds such as epoxidized vegetable oils, epoxidized animal oils, epoxidized fatty acid esters, and epoxy resin prepolymers; epoxy group-containing resins and the like, preferably epoxidized vegetable oils. When the heat stabilizer is used, the content thereof is preferably in the range of 0.05 to 6 parts by mass, more preferably in the range of 0.08 to 5 parts by mass, and particularly preferably in the range of 0.1 to 4 parts by mass, per 100 parts by mass of the resin material, preferably PVDC. If the content of the heat stabilizer is too small, the heat stability cannot be sufficiently improved, and the molding process is difficult, which may cause blackening. On the other hand, if the content of the heat stabilizer is too large, the gas barrier property and the cold resistance of the cylindrical resin film may be lowered, or bleeding or fish eyes may be caused. The type and amount of the other additives can be selected in the same manner as those of various additives conventionally used for tubular resin film formation in a filled package. These additives may be used alone in 1 kind, or may be used in combination in 2 or more kinds. In addition, a part or all of the amount of these additives may be contained in the monomer composition in the polymerization step of the resin material such as PVDC, or may be blended in the resin material such as PVDC after polymerization.
The PVDC may contain, as necessary, other resins such as polyethylene wax, oxidized polyethylene wax, polyethylene (low density polyethylene or high density polyethylene), ethylene-vinyl acetate copolymer, homopolymer or copolymer of acrylic acid ester, homopolymer or copolymer of methacrylic acid ester, and methyl methacrylate-butadiene-styrene copolymer for the purpose of improving various properties and molding processability. The properties, shape, and size of the other resin may be appropriately selected as desired in consideration of uniform dispersibility of the resin material forming the resin film F. For example, the solid may be in the form of granules, powder or pellets, or may be in the form of liquid or melt. The surface of another resin may be surface-treated as desired.
The size and thickness of the resin film F are determined according to the size of the content to be filled. The circumferential length of the resin film F is usually 15 to 400mm, most often 30 to 300mm, and widely used is in the range of 40 to 200mm, and the length of the resin film F in the longitudinal direction is usually 50 to 400mm, most often 70 to 300mm, and widely used is in the range of 80 to 250 mm. The thickness of the resin film F is determined by considering the strength, barrier property, etc. of the film according to the content to be filled, and is usually 15 to 300 μm, in many cases 18 to 200 μm, and a range of 20 to 150 μm is widely used. In this range, a thickness of 15 to 25 μm is preferable because the resin film F has a suitable strength and is easily cut.
As shown in FIGS. 1 and 3, the seal portion 10 is a first region P of the laminated film P which is disposed radially outward1Two sheets of film F1A,F1BAnd a second region P of the laminated film P arranged radially inward2Two sheets of film F2A,F2BA radially outer sheet of membrane F2AAnd welding the components together. In this embodiment, these 3 films F are subjected to high-frequency dielectric heating described later1A,F1B,F2AAnd (4) welding.
In the laminated film P, a first region P arranged radially outward from the laminated film P1Approaching edge part PEHas a predetermined width W from the extreme end1Region P ofAIs provided as a non-sealing portion 20. Two rows of through holes 30 are formed in the non-seal portion 20 at a predetermined interval d in the longitudinal direction. The non-sealing portion 20 (region P) having the through-hole 30 formed therein in this mannerA) This is a region serving as a starting point when the seal portion 10 is cut, and is easily torn by a user's hand. Width W of the non-sealing portion 201The distance d between the through holes 30 may be set to be in the range of 4 to 8mm, and the distance d between the through holes 30 may be set to be in the range of 3 to 30 mm. In the present embodiment, although an example in which two rows of through holes 30 are formed is shown, one row of through holes may be formed, and three or more rows of through holes may be formed.
Next, a method for manufacturing the package 1 according to the present embodiment will be described with reference to fig. 4 and the like.
First, a first region P of a laminated film P formed by overlapping two resin films F1And a second region P2Arranged respectively at the radial outer side and the radial inner side and overlapped to form an envelopeA cylindrical body in the form of a pouch is sealed (first step). Next, as shown in fig. 4, the first region P overlapped in the first step is formed1And a second region P2By means of an external electrode E arranged radially outside1And an inner electrode E arranged radially inward2The package 1 having the sealing portion 10 is formed by sandwiching and sealing the package by high-frequency dielectric heating (second step). In the second step, the first region P arranged radially outward of the laminated film P is formed1Approaching edge part PE1Has a predetermined width W from the extreme end1Region P ofAAs the non-seal portion 20.
In the second step, as shown in fig. 4, the first region P arranged radially outward of the laminated film P is1And an external electrode E1The object 100 is sandwiched between the two members, which are not sealed by the high-frequency dielectric heating, and the high-frequency dielectric heating is performed in this state. By doing so in the first region P1And an external electrode E1The position of the portion (the darkest colored portion in fig. 4) that receives the most heat by the high-frequency dielectric heating can be shifted radially outward by sandwiching the sandwiched object 100 therebetween. Thus, as shown in fig. 3, the first region P disposed radially outward of the laminated film P can be configured1Two sheets of film F1A,F1BAnd a second region P arranged radially inward2Two sheets of film F2A,F2BA radially outer sheet of membrane F2AAnd welded to form the seal portion 10.
As the insert 100, for example, a Teflon tape having a thickness of 10 to 300 μm can be used. Other materials (for example, tapes or films of polyethylene, polypropylene, polyamide, polyimide, cellulose, polyester, or polyacetal, ceramics, or glass fibers) which are less heat-generating under high-frequency dielectric heating may be used as the insert 100.
As shown in fig. 2, two rows of through holes 30 are formed in the laminated film P at a predetermined interval in the longitudinal direction at a portion corresponding to the non-sealing portion 20 (third step). As described above, the width W of the non-sealing portion 201Can be suitably set in the range of 4 to 8mm, through holeThe interval d of 30 can be suitably set within the range of 3 to 30 mm. The third step is performed before the first step.
Next, a method of opening the package 1 of the present embodiment will be described.
When opening the package 1 in which contents such as sausage are packaged, a user first pinches the non-seal portion 20 of the package 1 with a finger and tears the package in a direction (width direction) substantially perpendicular to the longitudinal direction of the package 1, thereby applying a force to cut the seal portion 10. When such a force is applied, the seal portion 10 is broken in the width direction, and in this case, the first region P can be formed1Two sheets of film F1A,F1BOf (2) a radially outer membrane F1ADoes not contact the radially inner membrane F1BStripping the first region P1And the second region P2The sealing state is released surely by separation. Thereafter, the user cuts the laminated film P along the width direction of the package 1 or cuts the seal portion 10 along the longitudinal direction of the package 1, thereby opening the package 1.
In the package 1 of the embodiment described above, the first region P constituting the radially outer side of the cylindrical body in the form of an envelope is arranged1Two sheets of film F1A,F1BAnd a second region P arranged radially inside the cylindrical body2Two sheets of film F2A、F2BA radially outer sheet of membrane F2AAnd welded to form the seal portion 10. Therefore, when the sealed portion 10 is cut to open the package 1, the first region P arranged radially outward can be prevented from being formed1Two sheets of film F1A,F1BOf (2) a radially outer membrane F1AWith the membrane F radially inside1BAnd (6) stripping. As a result, the possibility of unsealing failure can be reduced.
In the above embodiment, the first regions P are overlapped with each other1And a second region P2Although the example of "the region near the edge" and "the region including the edge" of the laminated film P is shown, a region distant from the edge of the laminated film P may be usedThe region is used as a first region P1(second region P)2)。
The present invention is not limited to the above-described embodiments, and a configuration obtained by appropriately modifying the design of the above-described embodiments by those skilled in the art as long as the features of the present invention are provided is also included in the scope of the present invention. That is, the elements, the arrangement, the materials, the conditions, the shapes, the sizes, and the like of the elements included in the above embodiments are not limited to those illustrated, and can be appropriately changed. The elements of the above embodiments may be technically combined as much as possible, and a combination of the elements is also included in the scope of the present invention as long as the features of the present invention are included.

Claims (6)

1. A method for manufacturing a package, comprising the steps of:
a first step of forming a tubular body in the form of an envelope by arranging and overlapping a first region and a second region of a laminated film, which is formed by laminating two resin films, on the radially outer side and the radially inner side, respectively; and
a second step of forming a package having a sealed portion by sandwiching the first region and the second region overlapped with each other in the first step between an outer electrode disposed on a radially outer side and an inner electrode disposed on a radially inner side and sealing the regions by high-frequency dielectric heating,
wherein the content of the first and second substances,
in the second step, the two films constituting the first region disposed radially outward are welded to one film located radially outward of the two films constituting the second region disposed radially inward to form the seal portion,
the resin film is a vinylidene chloride film,
in the second step, a material to be sandwiched which is not sealed by high-frequency dielectric heating is sandwiched between the first region disposed radially outward and the external electrode, and high-frequency dielectric heating is performed in this state.
2. The method for producing a package according to claim 1, wherein the resin film has a thickness of 15 to 25 μm.
3. The method of manufacturing a package according to claim 1, wherein the insert has a thickness of 10 μm to 300 μm.
4. A method of producing a package according to any one of claims 1 to 3,
in the second step, a region of the laminated film having a predetermined width from an outermost end of an edge portion adjacent to the first region disposed radially outward is defined as a non-sealing portion,
the method comprises the following steps:
and a third step of forming at least one row of through holes arranged at a predetermined interval in a longitudinal direction in a portion of the laminate film corresponding to the non-sealing portion.
5. The method of manufacturing a package according to claim 4, wherein the non-seal portion is a region having a width of 4mm to 8mm from an outermost end portion of the edge portion.
6. The method of manufacturing a package according to claim 4, wherein the through-holes are arranged at an interval of 3mm to 30mm in a longitudinal direction.
CN202010552203.7A 2019-06-21 2020-06-17 Package and method for manufacturing same Active CN112109981B (en)

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KR20240038765A (en) 2021-08-30 2024-03-25 가부시끼가이샤 구레하 Vinylidene chloride-based resin compositions, stretched films and filled packaging bodies

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