WO2002085747A1 - Film plastique d'emballage a clapet antiretour et procede de fabrication d'un tel film plastique - Google Patents

Film plastique d'emballage a clapet antiretour et procede de fabrication d'un tel film plastique Download PDF

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Publication number
WO2002085747A1
WO2002085747A1 PCT/JP2002/001781 JP0201781W WO02085747A1 WO 2002085747 A1 WO2002085747 A1 WO 2002085747A1 JP 0201781 W JP0201781 W JP 0201781W WO 02085747 A1 WO02085747 A1 WO 02085747A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic film
check valve
film
packaging
bag
Prior art date
Application number
PCT/JP2002/001781
Other languages
English (en)
Japanese (ja)
Inventor
Hisashi Tanaka
Original Assignee
Hisashi Tanaka
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisashi Tanaka filed Critical Hisashi Tanaka
Publication of WO2002085747A1 publication Critical patent/WO2002085747A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts

Definitions

  • the present invention relates to a plastic film for packaging with a check valve and a method for producing the same.
  • the present invention relates to a plastic film for packaging with a check valve and a method for producing the same, and more particularly, to a plastic film for packaging with a check valve used as a raw film when automatically packaging coffee beans and the like, and a method for producing the same.
  • roasted coffee beans and the like are evacuated or replaced with nitrogen when packed in the bag in order to maintain their aroma and quality.
  • coffee beans and the like packed in a bag in this way generate impure gas such as carbon dioxide gas with the passage of time, not only impairing the flavor, but also filling the gas and sometimes breaking the bag.
  • check valves for discharging gas generated inside the bag have conventionally been developed.
  • a rigid valve body made by injection molding a plastic material is attached to a part of the bag body, a check valve bonded with a plastic film (see Japanese Utility Model Laid-Open No. 5-62665), a small-diameter valve.
  • a check valve called aromafin pulp (trade name of Bosch Corporation) in which a hard film is laminated is known.
  • a rigid valve body is thick and cannot be rolled because it is bulky.
  • all conventional ones are non-return valves that are sandwiched between films in the process of drawing out the original film of the bag body and automatically making (automatic packaging) the bags.
  • pinholes may occur in the film due to steps due to the thickness of the check valve, and it is necessary to add a new check valve installation device to the existing bag making equipment. G was high.
  • an object of the present invention is to provide a non-return valve-equipped plastic film which does not require a check valve mounting step in a bag making process or an automatic packaging process.
  • Another object of the present invention is to provide a plastic film for packaging with a check valve which can be rolled up as long as possible.
  • Still another object of the present invention is to provide a production method capable of supplying a plastic film for packaging provided with a completely vented check valve to the market. Disclosure of the invention
  • a plastic film for packaging with a check valve comprises a check valve comprising a nonwoven fabric or a porous plastic film and a soft plastic film attached at a constant pitch, A vent hole is formed at the mounting position of the stop valve, and the vent valve is rolled up.
  • the plastic film for packaging with a check valve having the above configuration is used as a raw film in automatic packaging of roasted coffee beans and the like. If the plastic film is pulled out of the roll and bag-making or automatic wrapping is performed, the check valve is already attached to the raw film, so the existing bag-making equipment or automatic packaging equipment is used as it is to check it. A packaging bag with a valve can be obtained.
  • Check valves must be attached to the plastic film at regular intervals for automatic bag making and packaging machines. Further, in order to supply the film in a rolled state, the check valve needs to be able to wind up the film and to be as thin as possible.
  • the check valve In the case of a wearing plastic film, the check valve is made of a nonwoven fabric or a porous plastic film and a soft plastic film, so that the thickness is small and this purpose can be sufficiently achieved.
  • the mounting position of the check valve be offset in a direction perpendicular to the winding direction.
  • the increase in thickness due to the check valve can be dispersed as much as possible, and the bulk can be minimized.
  • the method for producing a plastic film with a check valve includes the steps of: forming a ventilation hole in a predetermined portion of the plastic film; and forming a nonwoven fabric or a porous plastic in the portion of the plastic film where the ventilation hole is formed.
  • a check valve consisting of a tic film and a soft plastic film is attached by heat welding, and a ventilation check step of forcibly passing air through the check valve attached to the plastic film is provided.
  • the check valve Since the check valve is mounted on the plastic film by heat welding, even if the ventilation part of the check valve is subjected to welding inhibition processing, it may be in a pseudo welded state.
  • the ventilation state can be made complete by forcibly passing air through the check valve.
  • the incomplete ventilation can be detected before the roll is wound up by the ventilation check process, and a source film having only a complete check valve can be supplied.
  • FIG. 1 is a perspective view showing a rolled-up state of a plastic film for packaging with a check valve according to an embodiment of the present invention
  • Fig. 2 shows the plastic film pulled out from the roll. Plan view
  • FIG. 3 is a perspective view showing an example of a bag automatically packaged with the plastic film
  • FIG. 4 is an explanatory diagram showing an automatic packaging process using the plastic film
  • FIG. 5a is a front view showing a first example of a check valve
  • FIG. 5b is a cross-sectional view showing the check valve attached to the plastic film
  • FIG. 6 is an explanatory view showing a supply form of a check valve
  • Fig. 7a and Fig. 7b are explanatory diagrams showing a process of attaching a check valve to the plastic film, respectively.
  • FIG. 8 is a schematic explanatory view showing an automatic mounting process of the check valve
  • FIG. 9a is a cross-sectional view of a state where a second example of the check valve is attached to the plastic film
  • FIG. 9b is a front view of the check valve
  • FIG. 10a is a sectional view of a state where a third example of a check valve is attached to the plastic film
  • FIG. 10b is a front view of the check valve.
  • FIG. 1 shows a roll of a plastic film for non-return valve packaging 1 according to an embodiment of the present invention in the direction of arrow A.
  • FIG. 2 shows a state in which the film 1 is pulled out of the roll and transported in the direction of arrow B to the automatic packaging machine.
  • This plastic film for packaging 1 is composed of one heat-sealing plastic film or heat-sealing plastic film. Any kind of film may be used as a laminated film with a plastic film having no welding property, as long as it can be used as a raw film for automatic bag making or automatic packaging.
  • a check valve 10 (the structure of which is described in detail below) is provided at a constant pitch P on the plastic film 1 for packaging, and in a direction perpendicular to the longitudinal direction of the film 1 as shown in FIG. Mounted with offset by pitch a.
  • the plastic film for packaging 1 is transported in the direction of arrow A, and the check valve 10 is fixed at a constant pitch by an automatic mounting device 150 (the mounting process is described in detail below). It is attached at P and a (see Fig. 2) and wound up in a roll. Then, it is shipped to an automatic packaging factory for coffee beans and the like in a state of being wound up in a roll shape.
  • the contents are automatically filled using the plastic film for packaging 1 while, for example, forming a center seal bag 50 shown in FIG.
  • the check valve 10 is located at an appropriate position other than the front joint 51 and the upper and lower joints 52 of the bag 50.
  • the film 1 can be applied not only to the center seal bag but also to various types of bags such as a three-side seal bag, a chuck bag, a stand pack, and the like.
  • Reference numeral 102 denotes a guide roller for transporting the raw film 1
  • reference numeral 103 denotes a transport belt for the film 1.
  • Reference numeral 105 denotes a shaping mechanism for shaping the film 1 into a tubular shape, and is constituted by a tubular body 106 and a guide member 107.
  • Reference numeral 110 denotes a hopper for the contents, which is installed above the cylindrical body 106.
  • a pair of left and right transfer belts 103 are provided so as to press against the outer surface of the cylindrical body 106. And transports the raw film 1 intermittently.
  • Reference numeral 108 denotes a heat seal mechanism for the front joint 51 of the bag 50, and reference numeral 109 denotes a heat seal mechanism for the upper and lower joints 52.
  • the check valve 10, which is the first example, is designed to be attached to the front side (outside the bag) of the plastic film for packaging 1 as shown in FIGS. 5a and 5b. 1 has a large number of vent holes 2 formed therein.
  • the valve element 10 is composed of a breathable plastic film 11 generally known as a nonwoven fabric, a valve element 12 made of a polyethylene film, and a cover finolem 14 made of a polyethylene finolem. Further, the force bar film 14 functions as a valve body as described below.
  • the cover film 14 and the breathable plastic film 11 are heat-welded at portions c and d, and the valve body 12 and the cover film 14 are heat-welded at portion e. Further, the air-permeable plastic film 11 and the valve body 12 are heat-welded at the f portion.
  • the surface (outside the bag) of the plastic film 1 for packing and the permeable plastic film 11 are defined by the portions C and D, and the valve bodies 12, 14 are defined by the portions E and 14. ⁇ Attached to Film 1 by heat welding at F section.
  • the hatched portions are the welded portions, respectively, and the welding process is performed by pressing a hot plate having a shape corresponding to these welded portions at a predetermined temperature.
  • the welding inhibition layer 15 is applied to the cover film 14. Is provided.
  • heat-resistant ink Is preferably formed by Daravia printing.
  • the small air hole 2 faces the air-permeable plastic film 11.
  • gas is generated inside the plastic film for packaging 1 (inside of the bag) and the internal pressure increases, the gas passes through the air-permeable plastic film 11 through the small holes 2 and the film 11 and the force bar film.
  • the gas enters the gap 14 and is further exhausted through the gap between the valve body 12 and the cover film 14.
  • the cover film 14 comes into close contact with the valve body 12, whereby the inside of the plastic film for packaging 1 (the inside of the bag) is kept airtight.
  • a plurality of check valves 10 composed of films 11, 12, and 14 shown in FIG. 5a are formed in a continuous state.
  • a plurality of small air holes 2 are formed at predetermined positions on the plastic film 1 for packaging, and the air-permeable plastic film 11 is opposed to the small air holes 2.
  • Weld check valve 10 (see Fig. 7b). The check valve 10 is welded on the plastic plastic film 1 in a single-piece state by being urged by a dashed line shown in FIG.
  • the above mounting process is performed by the automatic mounting device 150 shown in FIG. 8, and the packaging plastic film 1 with the check valve is thereafter wound up into a roll.
  • the automatic mounting device 150 is roughly composed of a drilling machine 151, a welding machine 152, and a cooling / ventilation checking machine 153.
  • the drilling machine 15 1 consists of a die 15 1 a with a blade that can move up and down, and a pedestal 15 1 b. Small hole 2 Form.
  • the welding machine 15 2 comprises a heating die 15 2 a that can move up and down, a cutting blade 15 2 b, and a pedestal 15 2 c.
  • the heating die 152 a moves downward, the check valve 10 supplied on the film 1 is forced by the dashed line shown in FIG. 6 and is welded onto the film 1.
  • the cooling and ventilation checker 15 3 comprises a cooling die 15 3 a, a vertically movable receiving stand 15 3 b, and a vertically movable piston 15 3 c.
  • the pedestal 153 b moves upward to bring the check valve 10 welded onto the film 1 into close contact with the cooling die 153 a to cool the check valve 10.
  • the space 153d which is closed by a receiving stand 153b.
  • the space 153c is moved upward by moving the piston 153c upward. And forcibly vent the check valve 10.
  • the air that has passed through the check valve 10 is discharged from the hole 15 3 a ′ of the cooling die 15 3 a.
  • the plastic film 1 with a check valve is wound up into a roll.
  • a bag with a check valve can be manufactured using an existing bag making machine or an automatic packaging machine as it is.
  • the stop valve 10 is attached to the front surface of the film 1 (outside the bag), but may be attached to the back surface of the film 1 (inside the bag) as in the check valve 20 described below. Good.
  • a plurality of check valves may be provided in one bag.
  • the forced passage of air to the check valve to the packaging plastic film 1 is preferably t check valve to carry out the venting check If air permeability is checked at the final stage of the mounting process, it is possible to supply a packaging film 1 with a complete check valve.
  • the welding-inhibited portion that constitutes the ventilation path may be in a pseudo-adhesion state when heated, It is important to check.
  • the following points must be considered regarding the installation and winding of the check valve on the plastic film 1 for packaging. That is, when the film 1 is wound up in a roll shape, plastic deformation is caused in a film portion overlapping the check valve due to tightening. Therefore, it is necessary to stop using hard materials as check valves and use soft and flat materials. Even if a soft material is used, it is necessary to avoid firmly winding the film 1 because the place where the check valve is attached swells and the film 1 stretches. In particular, in order to minimize swelling during winding, as shown in Fig. 2, the mounting position of the check valve 10 should be offset by a pitch a in the direction perpendicular to the longitudinal direction of the film 1. Is preferred.
  • the vertical dimension of the bag 50 is 36 O mm
  • the vertical dimension of the check valve 10 is 3 O mm
  • the width is 25 mm
  • the thickness is 0.2 mm.
  • the mounting position is not offset, the mounting part of the check valve 10 becomes thicker by an average of 0.017 mm, and the film 1 is wound up by 100 to 200 m. As a result, the film 1 partially rises, and the film 1 extends.
  • the mounting position of the check valve 10 is offset in the range of 10 Omm in width, the thickness can be increased by about 0.04 mm, and the elongation of the film 1 is greatly eased. .
  • the check valve 20 of the second example is attached to the back side of the plastic film 1 for packaging (inside the bag). 1 has a large number of vent holes 2 formed therein.
  • the valve 20 is made of a breathable plastic film 21 which is generally known as a nonwoven fabric, a valve 22 made of a polyethylene film, a base film 23 made of a polyethylene film, and a polyethylene film. And a cover film 24.
  • the base film 23 and the breathable plastic film 2.1 are heat-welded at the c and d portions, and the breathable plastic film 21 and the valve body 22 are heat-welded at the e portion and the f portion.
  • Et al. The valve body 2 2 and Kabafu I le arm 2 4 are heat-welded in e part and f 2 parts of.
  • check valve 20 is configured such that the back surface of the film 1 (inside of the bag) and the base film 23 are formed by the portions C and D, the valve body 22 and the cover film 24 are formed by the portion E, The film 24 is attached to the film 1 by being thermally welded by the G portion.
  • the hatched portions are the welded portions, respectively, and the welding process is performed by pressing a heat plate having a shape corresponding to these welded portions at a predetermined temperature.
  • the base film 23 is Is provided with a welding inhibition layer 25.
  • the welding inhibition layer 25 is as described for the check valve 10 above.
  • the small ventilation hole 2 faces the cover film 24.
  • gas is generated inside the plastic film for packaging 1 (inside the bag) and the internal pressure increases, the gas passes through the breathable plastic finolem 21 and the gap between the film 1, the valve body 22 and the cover film 24 The air passes through the small holes 2 of the film 1 and is exhausted to the outside.
  • the valve body 22 comes into close contact with the film 1, and the inside of the film 1 (the inside of the bag) is kept airtight.
  • the steps of attaching the check valve 20 to the packaging plastic film 1 and winding it up into a roll are the same as those described for the check valve 10.
  • the check valve 30 of the third example is designed to be attached to the front side (outside the bag) of the plastic film for packaging 1 as shown in FIGS. 10a and 10b.
  • the film 1 has a large number of small air holes 2 formed therein.
  • the valve 30 is simply composed of a breathable plastic film 31 generally known as a nonwoven fabric and a valve 32 made of a plastic film of an appropriate material.
  • Adhesive 36 is applied to the inside of the circular valve element 32 as shown by hatching in FIG. 10b, and a small circular air-permeable plastic film 31 is adhered to the center part. Adhered to the surface of plastic film 1 for packaging.
  • the small air holes 2 face the air-permeable plastic film 31 and gas is generated inside the plastic film 1 for packing (inside the bag).
  • the gas passes through the gas-permeable plastic film 31, passes through the portion of the valve body 32 where the adhesive 36 is not applied, and is exhausted to the outside.
  • the part of the valve body 32 where the adhesive 36 is not applied adheres to the film 1, and the inside of the film 1 (the inside of the bag) is airtight. Is kept. ⁇
  • the check valve 30 may be mounted not only on the front side of the film 1 but also on the back side.
  • the plastic film for packaging with a check valve according to the present invention and the method for producing the same are not limited to the above embodiment, but can be variously modified within the scope of the gist.
  • the configuration of the bag to be manufactured is arbitrary, and the check valve itself can also adopt various configurations.
  • the plastic film for packaging with a check valve according to the present invention is useful as a raw material for easily producing a packaging bag capable of discharging only the internal gas, and in particular, is used for automatic production of coffee beans and the like. Suitable for use as a raw material for packaging.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Wrappers (AREA)

Abstract

La présente invention se rapporte à un film plastique d'emballage (1) comportant des clapets antiretour (10) constitué d'une garniture en non-tissé ou d'un film plastique à ouvertures multiples, disposés à sa surface à intervalles spécifiés (P) et enroulés sous la forme d'un rouleau. Le film (1) est rempli automatiquement avec un contenu alors qu'il est en cours de déroulement aux fins de la fabrication d'un sac scellé en sa partie centrale, et du fait que les clapets antiretour (10) sont connectés à un dispositif d'alimentation automatique en matériel d'emballage se trouvant dans l'état de pré-installation sur le film plastique utilisé en tant que rouleau de film d'origine, il est possible de supprimer le processus d'installation des clapets antiretour sur le côté du dispositif d'alimentation recevant le rouleau de film d'origine.
PCT/JP2002/001781 2001-04-17 2002-02-27 Film plastique d'emballage a clapet antiretour et procede de fabrication d'un tel film plastique WO2002085747A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001118415A JP2002308291A (ja) 2001-04-17 2001-04-17 逆止弁付き包装用プラスチックフィルム及びその製造方法
JP2001-118415 2001-04-17

Publications (1)

Publication Number Publication Date
WO2002085747A1 true WO2002085747A1 (fr) 2002-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/001781 WO2002085747A1 (fr) 2001-04-17 2002-02-27 Film plastique d'emballage a clapet antiretour et procede de fabrication d'un tel film plastique

Country Status (2)

Country Link
JP (1) JP2002308291A (fr)
WO (1) WO2002085747A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITGE20130102A1 (it) * 2013-10-15 2015-04-16 Gianluigi Rossi Metodo e apparato di realizzazione e applicazione di una valvola di sfiato su pacchi di confezionamento di prodotti sfusi.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4978124B2 (ja) * 2006-09-13 2012-07-18 大紀商事株式会社 抽出バッグ用シート

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934585B2 (ja) * 1979-08-06 1984-08-23 ロ−ベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 包装容器用過圧弁
JPH0940032A (ja) * 1995-08-01 1997-02-10 Hosokawa Yoko:Kk 電子レンジ用包装袋

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934585B2 (ja) * 1979-08-06 1984-08-23 ロ−ベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 包装容器用過圧弁
JPH0940032A (ja) * 1995-08-01 1997-02-10 Hosokawa Yoko:Kk 電子レンジ用包装袋

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITGE20130102A1 (it) * 2013-10-15 2015-04-16 Gianluigi Rossi Metodo e apparato di realizzazione e applicazione di una valvola di sfiato su pacchi di confezionamento di prodotti sfusi.

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