WO2001076955A1 - Recipient d'emballage, corps d'emballage le comprenant et procede d'emballage - Google Patents

Recipient d'emballage, corps d'emballage le comprenant et procede d'emballage Download PDF

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Publication number
WO2001076955A1
WO2001076955A1 PCT/JP2001/002180 JP0102180W WO0176955A1 WO 2001076955 A1 WO2001076955 A1 WO 2001076955A1 JP 0102180 W JP0102180 W JP 0102180W WO 0176955 A1 WO0176955 A1 WO 0176955A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
film
tray
heat
packaging container
Prior art date
Application number
PCT/JP2001/002180
Other languages
English (en)
Japanese (ja)
Inventor
Yoshio Iwasaki
Minoru Ohshita
Toshio Oguri
Norio Kawanishi
Original Assignee
Ishida Co., Ltd.
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
Priority claimed from JP2000346183A external-priority patent/JP2001348020A/ja
Priority claimed from JP2001036065A external-priority patent/JP2001348003A/ja
Application filed by Ishida Co., Ltd. filed Critical Ishida Co., Ltd.
Priority to AU41202/01A priority Critical patent/AU757599B2/en
Priority to NZ515790A priority patent/NZ515790A/en
Priority to EP01912498A priority patent/EP1193179A4/fr
Priority to KR1020017014163A priority patent/KR20020025059A/ko
Publication of WO2001076955A1 publication Critical patent/WO2001076955A1/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
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers

Definitions

  • Packaging container Description Packaging container, package containing it, and packaging method (Technical field)
  • the present invention relates to a packaging container, a packaging body including the same, and a packaging method, and more particularly to a packaging container for packaging an object to be packaged by bonding a film to a flange, a packaging body including the same, and a packaging method. . (Background technology)
  • the entire packaging container is covered with a film, and the films are bonded together on the bottom surface and heat-bonded.
  • the interface between the container body and the film is merely a contact, and the contents are liquid.
  • the liquid may leak when tilted. That is, the overlapping method has a problem that the sealing performance is poor.
  • the applicant of the present application disclosed in Japanese Patent Application No. 11-137705 a heated roller in a state of inclining on a film covering the upper surface of a packaging container (tray), and applied the film on the flange of the packaging container.
  • a method of rolling the roller is proposed. If this method is used, In addition, heat bonding and thermal fusing between the packaging container and the film can be performed at the same time by the heat roller inclined at a predetermined angle without the need for the mold frame. Therefore, it is possible to obtain a container which is compatible with a variety of container shapes and has excellent sealing properties.
  • An object of the present invention is to provide a packaging container capable of obtaining a sufficient adhesive strength when performing thermal bonding between a packaging container and a film by a heat roller inclined at a predetermined angle, a packaging body including the packaging container, and packaging. It is to provide a method.
  • the packaging container according to claim 1 includes a bottom surface, a wall surface, and a flange.
  • the bottom is the surface on which the package is placed.
  • the wall extends upward from the bottom surface so as to surround the bottom surface.
  • the flange extends outward from the upper end of the wall.
  • the flange has a curved portion on the wall surface side, and an inclined portion located outside the curved portion. And the cross section of the upper surface of the inclined portion is substantially straight.
  • the curved portion is formed such that the wall surface and the inclined portion have a continuous shape.
  • the flange shape of conventional packaging containers has a flat shape along a horizontal plane or a curled curved shape.
  • heated rollers heat bodies
  • linear contact occurs. Therefore, the packaging container and the film covered on the upper surface of the packaging container are adhered in a state like a line seal.
  • the packaged product is easily broken or peeled by the transportation or impact during the distribution process, and the stored packaged item is exposed. If the packaged object is a liquid, liquid leakage will occur.
  • a pinhole or the like may be opened in the bonded portion where the wire is sealed due to friction or the like when the heat body moves, and the sealing performance may not be maintained.
  • the packaging container according to the present invention is formed with a flange having an inclination substantially matching the angle at which the heat body contacts. Since the upper surface of the inclined portion of the flange is straight (the cross section of the upper surface is a straight line), the packaging container and the film are surface-sealed instead of line-sealed when the inclined heat body hits the flange, A stronger and more highly sealed bond is obtained.
  • the straight line of the inclined portion of the flange here may be a substantially straight line. That is, even if there is some curvature, the contact surface of the flange may be straightened by the pressure applied when the heat body hits the flange, and the surface may be bonded.
  • the inclination angle of the straight inclined part of the inclined flange is parallel to the inclination angle of the heating element from the beginning, and the sealing pressure is applied at the same time as the sealing element is pressed by the pressure applied to the heating element during sealing. Therefore, the inclination angle of the heat body may be substantially the same. In either case, the surfaces come into contact and a surface seal is made. In the latter case, the inclination angle is adjusted by pressing the heating element, so that a sealing pressure gradient is generated from the inside to the outside at the flange. For this reason, the pressure becomes stronger toward the outer edge of the flange, and the pressure forms a state in which the film can be more easily cut (heat-fused). Therefore, it is preferable to adjust the inclination angle of the linear inclined portion between the heat body and the flange by pressing the heat body as in the latter case.
  • the film does not adhere to the packaging container at the portion of the flange located inside the sealing part during sealing (perfect adhesion) Not) phenomenon occurs. That is, at the time of sealing, an air layer is formed between the flange of the packaging container and the film.
  • This air layer insulates the amount of heat provided by the heating element at the time of sealing, and the amount of heat from the heating element is concentrated on the film, causing a large thermal stress. Due to such phenomena, the heat resistance of the film used for ordinary packaging causes pinholes to be opened by heat.
  • the film In order to prevent the pinholes from being generated, the film must be laid on the part that does not come into contact with the heating element, but does not concentrate the amount of heat from the heating element on the part that comes close to the heating element. It must be kept in close contact with the packaging container.
  • a curved portion is formed inside the inclined portion (sealed portion) of the flange so that the film comes into close contact with the curved portion.
  • the amount of heat from the heat body is dissipated along the curved portion of the flange and the like, in addition to thermally bonding the inclined portion and the film. Therefore, pinholes that occur in conventional packaging containers are suppressed, and packaging with good hermeticity can be achieved.
  • the film In order to keep the film in close contact with the flange of the packaging container and maintain the state, the film is pulled by the device, the tension is applied to the film, and the inclined portion and the curved portion of the flange of the packaging container are maintained. It is better that the surface of the part has a contact area for sufficient adhesion with the film. In other words, it is a state in which surface contact is made instead of point contact (a state in which a sufficient coefficient of static friction can be ensured), and it is better that the surface is smooth. In general, if the surface state is glossy, the film and the packaging container can be sufficiently adhered.
  • Adhering the film is necessary in order to prevent the amount of heat from the heat source at the time of sealing from concentrating on the film as described above and to prevent the occurrence of bin holes and the like. Also, due to the problem of aesthetics of the packaging container after packaging, when the film is under a slight tension, it is more difficult to check the contents through the film from the outside when the contents are placed and packed. The transparency and visibility of the film are increased, and the naming is improved. In addition, in order to increase the consumer's willingness to purchase, it is preferable to apply tension to the film so as to improve the aesthetic appeal.
  • a packaging container according to claim 2 is the packaging container according to claim 1, wherein the inclined portion is inclined with respect to the bottom surface in a range of an inclination angle of 20 ° to 60 °.
  • a packaging container according to claim 3 is the packaging container according to claim 1 or 2, wherein the width of the inclined portion is 2 mm or more.
  • a packaging container according to claim 4 is the packaging container according to any one of claims 1 to 3, wherein an adhesive is applied to a surface of the flange.
  • a package according to a fifth aspect includes the packaging container according to any one of the first to fourth aspects, and a film. The film covers the top surface of the packaging container and the periphery is adhered to the flange.
  • the package according to claim 6 is the package according to claim 5, wherein the periphery of the film is adhered to the inclined portion of the flange along the curved portion of the flange without a gap.
  • the package according to claim 7 is the package according to claim 5 or 6, wherein the flange further has a protruding portion. The projecting portion is arranged on the outer peripheral side of the inclined portion, and cuts the film.
  • the package according to claim 8 is the package according to any one of claims 5 to 7, wherein the inclined heat body is applied to the inclined portion while the periphery of the film is in close contact with the curved portion and the inclined portion. The film is then heat bonded to the flange.
  • the packaging method according to claim 9 includes a first step, a second step, a third step, and a fourth step. In the first step, the object to be wrapped is placed on a packaging container having an inclined flange around it.
  • a film is supplied above the packaging container and tension is applied to the film.
  • the packaging container is raised, and the flange is brought into contact with the tensioned film.
  • the heat body is pressed against the flange with which the film is in contact at an inclination angle larger than the inclination angle of the flange.
  • the inclination angle of the flange of the packaging container The heat body is pressed against a large angle of inclination. Due to this, since the packaging container is usually elastic, the flange is deformed along the heating body when the heating body is pressed, and when the heating body hits the flange, the packaging container and the film are lined. Instead of a seal, the face is now sealed. As a result, a strong and highly sealable bond can be obtained.
  • the deformation of the flange when the body is pressed creates a situation where the outer end of the seal is under higher pressure than the other parts.
  • the pressure difference between the inside and the outside of the sealed portion becomes large.
  • the film can be easily blown off at the outer end of the sealing portion by the heat from the heat body or the tension of the film. For example, if the tension is applied between the sealing portion of the film and the outer portion when the sealing is completed, the film can be automatically blown.
  • the difference between the inclination angle of the flange and the inclination angle of the heating element is too small, the fusing property will decrease, and if it is too large, it will be difficult to seal the face. It is desirable to set it to a value.
  • the film is positioned at the top of the flange. There is almost no adhesion, and only the inclined portion of the flange is sealed. If the apex of the flange is bonded, the film is softened at the point where the apex is bonded when the heat body separates and the flange returns to its original shape, and tension is applied to it. Things such as fusing or shrinkage occur, reducing the commercial value of the package.
  • FIG. 1 is a cross-sectional view of a raw material of a tray in the first embodiment.
  • FIG. 2 is a cross-sectional view of the tray according to the first embodiment.
  • FIG. 3 is a schematic diagram of a packaging device according to the first embodiment.
  • FIG. 4 is an explanatory diagram of a packaging operation in the first embodiment.
  • FIG. 5 is an explanatory diagram of a packaging operation in the first embodiment.
  • FIG. 6 is a plan view of a tray, a stretch film, and a heat roller before packaging in the first embodiment.
  • FIG. 5 is a plan view of the sealing operation of the heat roller in the first embodiment.
  • FIG. 8 is a close-up view of the stretch film Fm before being sealed to the flange 13 in the first embodiment.
  • FIG. 9 is a state diagram of the heat roller, tray, and stretch film during sealing and fusing according to the first embodiment.
  • FIG. 10 is a state diagram of a stretch film during a sealing operation between the conventional tray and the tray of the first embodiment.
  • FIG. 11 is a state diagram of the heat roller, tray, and stretch film during sealing and fusing according to the third embodiment.
  • FIG. 12 is a state diagram of the heat roller, tray, and stretch film during sealing and fusing according to the fourth embodiment.
  • FIG. 1 shows a cross-sectional view of raw materials for a tray (packaging container) according to an embodiment of the present invention.
  • This raw material is a plastic sheet.
  • a tray is formed by vacuum-pressure forming the plastic sheet 90.
  • the plastic sheet 90 shown in FIG. 9 and the foamed plastic material layer 92 are bonded together.
  • the heat-meltable plastic material layer 91 serving as the upper surface of the tray is a layer that is thermally bonded to the stretch film by a heat body (heat roller 3) described later, and must be a material that can be thermally bonded to the stretch film.
  • a stretch film having a three-layer structure of ethylene vinyl acetate copolymer / Caylloy polypropylene / ethylene vinyl acetate copolymer is used, so that the heat-meltable plastic material layer 91 is the same as the stretch film.
  • an ethylene-vinyl acetate copolymer, polypropylene, or polyethylene is used as the heat-meltable plastic material layer.
  • foamed plastic material layer 92 a foam such as polystyrene or polypropylene is used.
  • the plastic material layer 93 which is the outer surface of the tray
  • a material having a heat shrinkage almost equal to that of the plastic material layer 91 is used.
  • the plastic material layers 91 and 93 having the same shrinkage ratio are bonded to both surfaces as the raw material, the deformation of the tray after molding can be suppressed.
  • a film such as ethylene vinyl alcohol copolymer or polyvinyl alcohol is used when gas barrier property is emphasized, and a polyester (polyethylene terephthalate) is used when importance is given to fragrance retention. Or polyethylene naphtholate) in a multilayer structure.
  • These materials may be selected in material and thickness depending on the gas to be barrier. It is also possible to impart gas barrier properties by vapor deposition such as aluminum vapor deposition or ceramic vapor deposition. Further, metal such as aluminum foil or iron foil can be used as the barrier layer, and the tray can be used as a layer other than the innermost layer which is an adhesive layer. However, if a metal is used for the barrier layer, transparency may be impaired for stretch films, so it may be difficult to use them.
  • a tray 110 having a cross-sectional shape shown in FIG. 2 is formed by using a vacuum pressure molding machine.
  • the tray 10 has a rectangular bottom surface 11, four walls 12, It is composed of 13 and.
  • the four wall surfaces 12 extend upward from four sides of the bottom surface so as to surround the bottom surface 11.
  • the flange 13 is a portion extending outward from the upper end of the wall surface 12.
  • the flange 13 is formed of a curved portion 13a on the wall surface 12 side and an inclined portion 13b located outside the curved portion 13a.
  • the curved portion 13a is formed such that the wall surface 12 and the inclined portion 13b have a continuous shape.
  • the curvature of the curved portion 13a is R2 (radius 2 mm) to R10, preferably R3 to R8 in consideration of the fact that the stretch film is closely attached to the tray.
  • the inclined portion 13b has a substantially straight cross section on the upper surface, and extends obliquely downward from the outer peripheral end of the curved portion 13b.
  • the angle of inclination of the inclined portion 13b with respect to the bottom surface 11 is set in the range of 20 ° to 60 ° so that when a heat roller (heated body) 3 described later comes into contact with the surface. Is done.
  • the range of the inclination angle is considered to be 5 ° to 90 °, but is preferably 20 ° to 60 ° in consideration of the inclination of the heat roller 3 and the like.
  • the inclination angle of the heat roller 3 and the inclination angle of the inclined portion 13b of the flange 13 need not necessarily be the same, but rather, the heat roller 3 is pressed at the time of sealing. At this time, it is preferable to set each angle so that the inclination angle of the inclined portion 13b and the inclination angle of the heat roller 3 substantially match.
  • the width of the flange 13 is ensured by the dimension D (see FIG. 2).
  • the width dimension D of the flange 13 is assumed to be 1 mm to 15 mm, but is preferably 3 mm to 10 mm. It is desirable that the width of the inclined portion 13b of the flange 13 be 2 mm or more.
  • the packaging apparatus 1 is the same as the packaging apparatus disclosed in Japanese Patent Application No. 1-137025.
  • the stretch film Fm is fed out from the setting section 51 of the film supply mechanism 5.
  • the unfolded strain The edge film F m transports two belts B that are stretched over the transport rollers 52 a and 52 b and two belts B that are stretched between the holding rollers 52 c and 52 d.
  • the stretch film F m in the width direction (vertical direction in Fig. 6). As a result, tension is applied to the stretch film F m in the width direction.
  • the moving portion 63 of the lift mechanism 6 moves up, and the tray 10 pushes up the stretch film Fm and stops (see FIG. 4). At this time, tension is applied to the stretch film Fm in the transport direction by pushing up the tray 10. Also, as shown in FIG. 8 (enlarged view), the stretch film F m comes into close contact with the outer portion of the curved portion 13 a of the flange 13 of the tray 10 and the inclined portion 13 b. .
  • the heat roller 3 is rotated as shown in FIG. 7 by rotating the rotary shaft 81 by a predetermined angle by the motor 82. Then, the heat roller 3 moves so as to follow the periphery (flange 13) of the tray 10, and seals the tray 10 with the stretch film Fm by heat fusion. At this time, the heat roller 3 moves while rolling on the flange 13.
  • FIG. 9 shows an enlarged view of the vicinity of the contact portion of the heat roller 3 when the heat roller 3 moves along the periphery of the tray 10.
  • the tray 10 is in a state in which the upper opening is covered with a stretch film Fm that is tensioned in front, rear, left and right.
  • the stretch film Fm is crimped on the outer portion of the curved portion 13a of the flange 13 of the tray 10 and on the inclined portion 13b.
  • the heat roller 3 applies heat and force to the contact portion between the stretch film Fm and the flange 13 at an angle.
  • the stretch film Fm and the flange 13 are thermally fused by these heat and force.
  • stretch fill is performed at the edge of the tray 10 (here, the outer peripheral end of the inclined portion 13 b of the flange 13 on which the heat roller 3 is in contact).
  • the heat and force are concentrated on the film Fm, and the tension is generated on the stretch film Fm, so that the stretch film Fm melts and is cut off at the edge of the tray 10 (see Fig. 9).
  • the angle of the heat port 3a with respect to the horizontal plane is set slightly larger than the angle of the inclined portion 13b of the flange 13, and as shown in FIG.
  • the pressure from the heat roller becomes the largest at the outer peripheral end of the flange 13, so that the tension of the stretch film F m causes the stretch film F m at the outer peripheral end of the flange 13. Be blown. Since the pressure is highest at the outer peripheral end of the flange 13, the flange 13 has a pressure gradient from the curved portion 13 a toward the outer peripheral end. Therefore, the pressure is weaker in the vicinity of the film F m and the flange curved portion 13a than in the outer peripheral end, and the load due to heat and pressure is applied at the boundary between the inner peripheral end of the flange 13 to be sealed. The stress is reduced and the stretch film F m is sealed without applying a load.
  • FIG. 10 shows a case where the stretch film F m is sealed on the conventional tray 100 and a case where the stretch film F m is sealed on the tray 10 of the present embodiment.
  • FIG. 10A is an enlarged view of the vicinity of the flange 113 when the stretch film Fm is thermally welded to the conventional tray 100 by the heat roller 3.
  • the flange 1 13 of the tray 100 has a first curved portion 1 13 a, a horizontal portion 1 13 b, and a second curved portion 1 13c and a vertical portion 1 13d.
  • the tray 100 and the stretch film Fm are sealed.
  • an air layer S1 is formed between the flange 113 and the stretch film Fm.
  • the air layer S1 plays a role of a heat insulating material, the amount of heat from the heat roller 3 is concentrated on the stretch film Fm at the boundary between the second curved portion 113c and the vertical portion 113d, There, the stretch film Fm is thermally blown.
  • the air layer S2 tends to be similarly formed between the stretch film Fm and the horizontal portion 113b of the flange 113.
  • the air layer S2 plays a role of a heat insulating material for the amount of heat from the heat roller 3, and is likely to generate a pinhole due to heat inside the seal portion. If such a pinhole is opened, the tightness inside the tray 100 cannot be maintained. Also, if the binhole becomes large, the packaging itself will not be done.
  • FIG. 10B shows a state in which the stretch film Fm is heat-sealed to the tray 10 of the present embodiment.
  • the stretch film Fm closely covers the inclined portion 13b of the flange 13 and the outer portion of the curved portion 13a.
  • the heat roller 3 mainly hits the inclined portion 13b and hardly hits the curved portion 13a. Therefore, the air layers SI and S2 as shown in FIG. 10 (a) are not formed, and the seal is stably performed without opening the bin hole or the like.
  • the raw material for tray 10 is a non-stretched polypropylene film (CPP) with a 40-m-thick surface layer on both sides, and the base material sandwiched between them is a foamed polystyrene sheet (thickness 1.5 mm, weight 260 g / m 2 ).
  • CPP non-stretched polypropylene film
  • This is a sheet manufactured by co-extrusion and composed of three layers: CPP (40 mm) / expanded polystyrene (1.5 mm) / CPP (4 Om). Then, this sheet was set on a mold, and a food tray 10 was obtained with a vacuum press forming machine.
  • the dimensions of the tray are 130 mm x 18 Omm in outer diameter, 30 mm in depth, 35 ° in flange angle, 5 mm in flange width, and 5 mm in curvature of the curved part.
  • the tray 10 was set in a heat-opening type stretch film packaging apparatus as described above, and the stretch film Fm was heat-sealed to the tray opening.
  • a stretch film Fm composed of a three-layer structure of 15 mm in thickness of Linear Low Density-Polyethylene (L LDPE) Nokia Corporation Roy Polypropylene Z Linear Mouth-Density-Polyethylene (LLDPE) was used.
  • L LDPE Linear Low Density-Polyethylene
  • LLC Linear Mouth-Density-Polyethylene
  • the seal temperature (heat roller temperature) was set at 190 ° C.
  • the tray 100 which is a comparative example, was made of the same material as the tray 10, and had the same size as the tray 10 and had a flange 113 as shown in FIG. 10 (b). .
  • the seal strength is the average value of the entire tray in the circumferential direction. As can be seen from the results, in the tray 10 as a specific example of the present invention, a seal strength of 500 gf / 15 mm or more was stably obtained.
  • the flange 13 of the tray 10 is formed with an inclined portion 13b having an inclination angle corresponding to the inclination angle of the heat roller 3, and a curved portion 13a is provided so that the tray 13 can move inward. Since the stretch film Fm contacts the surface of the tray 10 (the surface of the curved portion 13a) to the point where the heat roller 3 does not touch, the heat of the heat roller 3 is only the stretch film Fm. Therefore, the thermal stress applied to the stretch film Fm is reduced, and the occurrence of pinholes is suppressed.
  • the tray was formed by vacuum pressure forming using a 0.8 mm thick sheet made of polypropylene.
  • the tray dimensions were an outer diameter of 14 O mm x 21 O mm, a depth of 25 mm, a flange angle of 35 °, and a flange width of 1 O mm.
  • An adhesive a truck-type heat sealant AD-1790-15 manufactured by Toyo Morton, was applied to the flange. Since this was a test, a certain amount of this was applied to the flange non-automatically, and it was fully dried.
  • the film was set in a heat roller type stretch film packaging machine, and the stretch film was heat-sealed.
  • the stretch film used for the seal is an ethylene vinyl acetate copolymer / A 15-dm-thick layer consisting of a three-layer structure of a Kyaoi Roy polypropylene / ethylene vinyl acetate copolymer was used.
  • the heat seal strength was measured for a tray obtained by heat sealing a stretch film on a tray.
  • the inclined portion approximately matches the inclination angle of the heat roller, and the curved portion that can interpose not only the stretch film but also the tray itself or an adhesive and the like other than the air layer in the vicinity of the heat roller. These form a flange.
  • the concentration of the heat from the heat roller on the stretch film is suppressed, and the occurrence of defects such as pinholes is reduced.
  • a more secure and secure seal can be performed.
  • the flange 13 may be shaped as shown in FIG.
  • a protruding portion 13c is formed on the outer peripheral side of the inclined portion 13b.
  • the protruding portion 13c protrudes toward the heat roller 3, and plays a role of fusing the stretch film Fm.
  • the protruding part 13 c has a sharp pointed end, and the stretcher caught between the protruding part 13 c and the heat roller 3. High pressure acts on Ilm Fm. For this reason, the stretch film Fm is surely melted at this portion.
  • FIG. 2 shows a case where the inclination angle of the heat roller 3 and the inclination angle 13 b of the flange 13 of the flange 13 are substantially equal, but as shown in FIG. It is also desirable to positively adopt a structure in which the inclination angle / of 3 is slightly larger than the inclination angle of the flange inclined portion 13 b of the tray 10.
  • FIG. 12 shows a state in which the film F m is set on the upper surface of the tray 10 while tension is applied to the stretch film F m, and sealing is performed by the heat roller 3.
  • the heat roller 3 has a slightly larger inclination angle /? With respect to the inclination angle 13 of the inclined portion 13 b of the flange 13.
  • the slanted portion 13b of the flange 13 having the bent shape is face-sealed with the stretch film Fm at the straight portion.
  • the seal width is the width of the portion where the stretch film Fm and the human roller 3 are in contact, and 2 mm or more is secured.
  • the outer end of the flange 13 is located at the top of the pressure gradient of the portion in contact with the heat roller 3.
  • the stretch film Fm is blown off at the outer end of the flange 13 by the amount of heat from the heat roller 3 and the tension of the stretch film Fm to the outside of the tray in addition to the pressure from the heat roller 3. .
  • the seal portion is the inner end of the contact portion between the flange 13 and the stretch film Fm. Part, and is directly heated by the heat roller 3. For this reason, the tension of the stretch film Fm directly acts on the stretch film Fm on the inner end face of the seal portion, that is, the stretch film Fm that is bonded but not completely cooled. Before the stretch film Fm solidifies, defects such as breakage of the stretch film Fm or pinholes occur on the inner end surface of the seal portion (the inner end portion of the contact portion). On the other hand, in the present embodiment, the inclination angle /?
  • heat roller 3 is set so that the sealing is performed outside the vertical center line of the curved portion 13a of the flange 13 at the time of sealing, and is not sealed inside. , The occurrence of defects such as breakage of the stretch film F m or generation of pinholes is suppressed.
  • the tray 10 is obtained by forming a sheet into a specified shape by vacuum and pressure forming, and after forming, cutting the end to a specified flange dimension.
  • the mold is placed on the outside of the tray 10, and although the outer dimensions can be accurately molded, it is quite difficult to accurately and strictly mold the inner dimensions.
  • the flange 13 of the tray 10 may have an inclination error due to molding and a cutting error when cutting the end. Therefore, even in the same tray, not all of the flanges 13 have the same inclined portion 13b, which is the same angle of inclination, and the end portion has a horizontal error which causes a cutting error. Some have a flat part.
  • the sealing mechanism In order to suppress the occurrence of sealing failure due to errors during molding, the sealing mechanism must be able to tolerate some errors. In view of this point, it is preferable to adopt a structure in which the inclination angle of the heat roller 3 is slightly larger than the inclination angle of the flange 13 as in the present embodiment.
  • the heat roller 3 is attached to the outer end of the flange 13. It is considered that there is a case where contact does not occur and thermal fusing cannot be performed. However, if the inclination angle of the heat roller 3 is slightly larger than the inclination angle of the flange inclined portion 13b as in the present embodiment, the inclination angle of the flange 13 due to an error during molding may occur. It hardly occurs that the inclination angle of b becomes larger than the page inclination angle of the heat roller 3. (Industrial applicability)
  • the inclined portion is formed on the flange, and the upper surface of the inclined portion is made straight, so that the packaging container and the film are surface-sealed when the inclined heat body hits the flange.
  • a stronger and more sealable bond can be obtained.
  • the film comes into close contact with the curved portion, and the amount of heat from the heat body is radiated along the curved portion. Therefore, pinholes that occur in conventional packaging containers are suppressed, and packaging with good sealing properties can be achieved.
  • the heating element is pressed against the inclined flange of the packaging container at an inclination angle larger than the inclination angle of the flange, the flange is deformed and the heating element is pressed against the packaging container.
  • the film is now face-sealed, and stronger pressure is applied at the outer end of the seal than at the other part, so that the film can be easily blown at the outer end of the seal, and the top of the flange In this way, the stretch film hardly adheres to the film, and the problem of opening a hole in the film is suppressed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)
  • Packages (AREA)
  • Basic Packing Technique (AREA)
  • Cartons (AREA)

Abstract

L'invention concerne une barquette faisant preuve d'une résistance d'adhésion suffisante dans une opération de thermoliage de celle-ci et d'un film étirable au moyen d'un rouleau chauffant incliné. Ladite barquette (10) comprend une surface inférieure (11), une paroi (12) et un rebord (13). La surface inférieure (11) est une surface sur laquelle un objet à emballer est placé. La paroi (12) s'étend vers le haut depuis la surface inférieure (11), de sorte qu'elle entoure cette dernière. Le rebord (13) s'étend vers l'extérieur depuis l'extrémité supérieure de la paroi (12). Par ailleurs, le rebord (13) possède une partie courbe (13a) sur le côté de la paroi et une partie inclinée (13b) positionnée vers l'extérieur de la partie courbe (13a). La partie supérieure de la partie inclinée (13b) possède une section sensiblement linéaire. La partie courbe (13a) est formée, de manière que la paroi (12) et la partie inclinée (13b) forment un ensemble de forme continue.
PCT/JP2001/002180 2000-04-06 2001-03-19 Recipient d'emballage, corps d'emballage le comprenant et procede d'emballage WO2001076955A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU41202/01A AU757599B2 (en) 2000-04-06 2001-03-19 Packaging container, packaging body including the same, and packaging method
NZ515790A NZ515790A (en) 2000-04-06 2001-03-19 Packaging container, packaging body including the same, and packaging method
EP01912498A EP1193179A4 (fr) 2000-04-06 2001-03-19 Recipient d'emballage, corps d'emballage le comprenant et procede d'emballage
KR1020017014163A KR20020025059A (ko) 2000-04-06 2001-03-19 포장용기, 그것을 포함하는 포장체, 및 포장방법

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2000-104433 2000-04-06
JP2000104433 2000-04-06
JP2000-346183 2000-11-14
JP2000346183A JP2001348020A (ja) 2000-04-06 2000-11-14 包装容器、及びそれを含む包装体
JP2001-036065 2001-02-13
JP2001036065A JP2001348003A (ja) 2000-04-06 2001-02-13 包装容器の包装方法

Publications (1)

Publication Number Publication Date
WO2001076955A1 true WO2001076955A1 (fr) 2001-10-18

Family

ID=27343003

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/002180 WO2001076955A1 (fr) 2000-04-06 2001-03-19 Recipient d'emballage, corps d'emballage le comprenant et procede d'emballage

Country Status (8)

Country Link
US (1) US20020179607A1 (fr)
EP (1) EP1193179A4 (fr)
KR (1) KR20020025059A (fr)
CN (1) CN1366504A (fr)
AU (1) AU757599B2 (fr)
NZ (1) NZ515790A (fr)
TW (1) TW534890B (fr)
WO (1) WO2001076955A1 (fr)

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JP5122789B2 (ja) * 2006-10-27 2013-01-16 東洋製罐株式会社 角形絞り容器およびその成形方法
ITBO20070391A1 (it) * 2007-06-01 2008-12-02 Coopbox Europ Spa Foglia di materia plastica, vassoio per un prodotto alimentare ottenuto da detta foglia, confezione comprendente detto vassoio e relativo metodo di realizzazione.
MX2010013865A (es) * 2008-06-17 2011-02-15 Cryovac Inc Charola termoplastica.
NL2001739C2 (nl) * 2008-07-01 2010-01-05 Ch Food B V Werkwijze voor het afdekken van een houder, en verpakking.
KR101690343B1 (ko) * 2009-01-06 2016-12-27 이데미쓰 유니테크 가부시키가이샤 용기 본체, 포장 용기, 용기 본체의 제조 방법 및 제조 장치
CA2791638C (fr) * 2009-03-16 2017-08-29 1/4 Vin Verre a vin, procede de conditionnement du vin, et conteneur de vin
CN102009772B (zh) * 2009-09-08 2014-09-10 出光统一科技株式会社 包装容器、其制造方法以及制造装置
JP6235497B2 (ja) * 2015-01-22 2017-11-22 株式会社イシダ 包装装置
CN106628616B (zh) * 2017-01-22 2020-12-25 罗松 一种发泡聚乙烯材质的包装容器
PE20200060A1 (es) 2017-02-16 2020-01-15 Alto Packaging Ltd Mejoras para bandejas
KR102309363B1 (ko) * 2017-02-28 2021-10-07 컨버터 매뉴팩처링, 엘엘씨 매끄러운 연부 및, 임의적으로, 박리 가능한 표면을 가지는 형성된 열가소성 물품

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JPH03176378A (ja) * 1989-11-29 1991-07-31 Showa Alum Corp 食品密封包装用容器
JPH0472135A (ja) * 1990-07-09 1992-03-06 Kureha Chem Ind Co Ltd 食品用容器およびその製造方法と製造装置
JPH04182125A (ja) * 1990-11-15 1992-06-29 Yamato Esuron Kk 食品貯蔵用容器

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Also Published As

Publication number Publication date
US20020179607A1 (en) 2002-12-05
EP1193179A4 (fr) 2004-12-08
AU4120201A (en) 2001-10-23
KR20020025059A (ko) 2002-04-03
TW534890B (en) 2003-06-01
AU757599B2 (en) 2003-02-27
EP1193179A1 (fr) 2002-04-03
CN1366504A (zh) 2002-08-28
NZ515790A (en) 2003-09-26

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