WO2003064273A1 - Contenant flexible comportant des lignes de pliage, decoupe pour ce contenant, procede de production de celui-ci et systeme d'etancheite - Google Patents

Contenant flexible comportant des lignes de pliage, decoupe pour ce contenant, procede de production de celui-ci et systeme d'etancheite Download PDF

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Publication number
WO2003064273A1
WO2003064273A1 PCT/SE2003/000125 SE0300125W WO03064273A1 WO 2003064273 A1 WO2003064273 A1 WO 2003064273A1 SE 0300125 W SE0300125 W SE 0300125W WO 03064273 A1 WO03064273 A1 WO 03064273A1
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WO
WIPO (PCT)
Prior art keywords
fold lines
sealing
container
lines
main body
Prior art date
Application number
PCT/SE2003/000125
Other languages
English (en)
Inventor
Tommy JÖNSSON
Original Assignee
Tetra Laval Holdings & Finance S.A.
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 Tetra Laval Holdings & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Publication of WO2003064273A1 publication Critical patent/WO2003064273A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/148—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier placed at the interface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Definitions

  • the invention relates to a packaging container comprising a substantially pillow shaped closed main body being provided with a stand surface, two methods of producing the same and a sealing jaw for use in the production of said packaging container.
  • the packaging properties searched for are probably among others that the transportation should be easy, it should be the desired amount beverage, and it should be easy to get rid of the empty package.
  • One kind of packaging container that conventionally has been used for portion packs for beverage is a stand up pouch made of plastic films.
  • a stand up pouch is rather simple to manufacture, the package as such has a low weight and it can easily be disposed of when emptied.
  • one major drawback with the stand up pouches is their poor handleability. Especially when they are half empty they gets flabby and it gets hard to put a pouch away on a table or in the refrigerator.
  • the free standing pouch is made of a heat-sealable or weldable plastic material for liquids or pastes, said pouch comprising two sidewalls connected to each other along their longitudinal edges, a foldable bottom element which is disposed between said side walls and which serves as a supporting base, being inserted between the bottom transverse edges.
  • the bottom portion has a cross-section shaped as a W.
  • the outer shanks of the W are the sidewalls and the inner shanks of the W are the folded bottom element inserted between the sidewalls.
  • the corners of the foldable bottom element are sealed to respective sidewall, which means that the two downwardly directed points of the W are still separated but the bottom part of the outer shanks is welded together with the bottom part of respective inner shank.
  • the corner portions cannot be separated to the same extent as the centre portion of the bottom, which will lead to a package with an oval shaped cross-section if view from above.
  • Another kind of packaging container that conventionally has been used for portion packs for beverage is a self-supporting container made of paper covered with protective layers made of plastic and in some cases also aluminium. This kind of package is more stable to handle and can be disposed of almost as easy as the above-mentioned pouch.
  • crease lines are formed about which the paper is folded to form the container. Without crease lines the paper container would not get the well defined shape and it would not get the same mechanical strength. However, in some cases it is desired to make the portion packs transparent so that the consumer can see the beverage contained in the packaging container.
  • the plastic materials that are transparent can usually not be provided with crease lines, since the materials will not get any substantial remaining deformation.
  • One way of measuring the effectiveness of the formation of the crease lines is the Remaining Crease Stiffness (RCS) value, where the stiffness of the crease lines are compared with the stiffness of the not creased material.
  • RCS Remaining Crease Stiffness
  • the RCS value should in case of small portion packages (ca 250-330 ml) be in the neighbourhood of 80-85% and in case of larger family packages (1-1 ,5 I) in the neighbourhood of 75-80%. It is considered that values above 90% make the package forming hard.
  • the plastic materials used in transparent packages have a RCS value in the neighbourhood of 99-100%, which means that the ways of forming a paper container cannot directly be used in forming a transparent plastic container.
  • the packaging concepts of today all suffer different kinds of drawbacks in respect of e.g. manufacture, transportation, handleability, forming, transparency etc.
  • the forming of fold lines by fixing the sidewalls to each other makes it possible to form stable fold lines even if the material as such as almost no stiffness (e.g. plastic film).
  • the fixing of the sidewalls to each other forms a seal such that the edge portions located outside the fold lines are sealed from the pillow shaped product-containing body of the container.
  • the product located in the pillow shaped container inside the fixed fold lines constitute an abutment about which the outer flaps are folded. Since the fixed fold lines also constitute a seal, the abutment (i.e. the product) is always located in exact abutment with the fold line.
  • This way of folding the edge portions located outside the fold lines makes it possible to form a relatively stiff and thus self-supporting stand surface even when material with a very low stiffness is used.
  • This relatively stiff stand surface makes it possible to handle the packaging container almost as easy as if it was made of a self-supporting packaging material.
  • the bottom surface can e.g. withstand a compression force in the plane of the bottom surface, which means that the inventive packaging container e.g. easily can be put in a refrigerator also after it has been opened, and furthermore the risk of accidentally squeezing the packaging container and thereby spilling the beverage is decreased compared to traditional stand-up pouches.
  • the pattern of fixed fold lines defines two substantially triangular corner portions. These triangular portions are adapted to be folded about the fixed fold line and abut the outside of one of the sidewalls and thereby form a portion of the stand surface. This gives the flaps a relatively high increase in stiffness even if a relatively low amount material sacrificed as flap material (instead of forming the product containing pillow).
  • said fixed fold lines extend, when the container is folded, along a line extending between two opposite corners of the stand surface.
  • the flaps will be refolded about each other along lines extending in angle to said line and thereby form stiffness-increasing ridges.
  • a portion located between said triangular portions is folded towards the same side of the main body as the triangular portions. This also causes the flaps to be refolded about each other.
  • the fixed fold lines are formed by a continuous seal between the inner sides of two opposing portions of the sidewall of the main body along an edge portion of the main body. This way the area forming the flaps is completely sealed from the area containing the product. This is advantageous since any product residue trapped between the transversal seal and the fold lines is not in contact with the product in the container.
  • the intermediate fold lines connect with the triangle-defining fold lines substantially perpendicular. This configuration is especially advantageous since it has been found that the container as such has an inherent desire to follow these fold lines, which in the end makes the final forming of the container especially easy.
  • the refolded flaps are fixed to the outside of the main body or to the outside of other flaps. This is an easy way of fixing the flaps. It can e.g. be done using hot air that partially melts an outer plastic layer of the packaging material. It could also be done using some kind adhesive put on the outside of the flaps or the sidewalls.
  • a method of producing a packaging container comprising the steps of; providing a web of packaging material, forming the web into a tube, filling a product, such as beverage, into the tube, dividing the filled tube into pillow shaped containers by transversally sealing the tube, providing the container with fixed fold lines by fixing the inner sides of two opposing portions of the sidewall of the main body, along an edge portion of the main body, to each other along fixed fold lines, cutting the tube into pillow shaped individual containers at the transversal sealings, and folding the edge portions located outside the fixed fold lines about the fixed fold lines to form the bottom surface.
  • the step of transversally sealing the tube and providing the container with fixed fold lines is accomplished in a single step, wherein the tube is locally compressed such that the inner sides contact each other along a transversal line, and the inner sides are sealed to each other forming said transversal seal and said fixed fold lines.
  • This further enhances the productivity of the method. Furthermore, it makes it easier to use a machine adapted also for production of packages using creased material where the only seals made are the transversal seals.
  • the fixed fold lines are accomplished after the tube is divided into separate containers. This way the basic method and machine adapted for the production of pillow-shaped containers can be used without any rearrangement at all. This increases the flexibility of the concept.
  • the tube is formed of two webs sealed to each other along their longitudinal edges. This way the forming of the tube can be accomplished with the tube in a plane state, which makes it easy to secure the correct formation of the longitudinal seal even when the stiffness of the material is very limited. This way of forming the tube is e.g. suitable when the packaging containers are to be formed of thin plastic film.
  • a method of producing a packaging container comprising the steps of providing a tube shaped blank of packaging material, sealing in a first step one end of the tube shaped blank, filling product, such as beverage, into the blank, sealing in a second step the other end of the tube shaped blank, providing the container with fixed fold lines by fixing the inner sides of two opposing portions of the sidewall of the main body, along an edge portion of the main body, to each other along fixed fold lines, folding the edge portions located outside the fixed fold lines about the fixed fold lines to form the bottom surface.
  • the method of producing a blank is a flexible method.
  • the step of providing the container with fold lines and the step of the second sealing can be freely chosen.
  • the first sealing of course also could be the sealing forming the top on the final packaging container.
  • the bottom transversal sealing and the fixing of the fold lines is made in a first single step. Thereafter the blank is filled, top sealed and finally folded about the fixed fold lines. This specific way utilises the flexibility of using blanks combined with the positive effect of having the product as an abutment.
  • the basic machine concept available is adapted for the filling of thin-walled plastic bags it could be beneficial to first make a straight transversal seal, fill the bag and then seal the upper end and provide the upper end with the pattern of fixed fold lines.
  • this second sealing step and the step of providing the container with fixed fold lines is accomplished in a single step, which increases the productivity of the method.
  • the blanks are formed of two webs sealed to each other along one longitudinal edge forming top or bottom and divided into blanks by transversal seals forming sides on the container. This is a method especially adapted for thin walled plastic bags, but it can of course be used in respect of different kinds of materials.
  • the fixed fold lines are accomplished by heat-sealing the inner sides of the two opposite portions of the main body.
  • This is a rather simple method and the technology is available in the packaging industry for forming transversal and longitudinal seals delimiting the packaging container.
  • the method can be used to seal inner sides to each other even after the container has been filled with the product.
  • most packaging materials already have a layer of plastic film closest to the product to make the packaging container tight. Thus, it is convenient to use this plastic film and partially melt it and press it together in order to make it form a heat-welded seal.
  • One preferred method of accomplishing the heat sealing is to use ultra sonic heating of the packaging material. According to this method the material is locally caused to vibrate such that the hysteresis of the material causes to be heated.
  • Another preferred method of accomplishing the heat sealing is to use radio frequency heating of the packaging material,
  • This method is conventionally used for sealing packaging materials including a layer of aluminium. A layer like this is usually used as barrier layer in so-called aseptic packaging adapted for ambient distribution.
  • the sealing jaw comprises an electrical circuit adapted to influence a magnetically conductive material such that internal currents will occur in the material, which in turn causes the material to be heated due to the internal electrical resistance of the material.
  • Another preferred method of accomplishing the sealing is to use a method including printing black heat absorbent ink on the areas to be heated and heating these areas by illumination of the container with a lamp, such as a infra red lamp. This method makes it possible to focus the heating to the desired portions of the packaging material in a secure manner.
  • Another preferred method of accomplishing the fixed fold lines is to use an adhesive for the sealing of the inner sides of the two opposite portions of the main body to each other.
  • the adhesive to e.g. be pressure of heat activated.
  • the application of adhesive is preferably made when the packaging material is in a plane state, which makes it easy to put the adhesive on the desired portions with high accuracy, which in turn means that providing the packaging material with fold lines can be made in an accurate manner.
  • a sealing jaw for sealing two portions of a blank or filled packaging container to each other.
  • the sealing jaw has a first sealing portion adapted to form a pattern of sealed folding lines at the bottom portion of the container or blank, whereby the first sealing portion has a transversal extension substantially corresponding to the width of the blank or container.
  • the sealing jaw has been given the characterising feature that the sealing surface is formed as two inclined lines located at the two transversal ends of the first sealing portion, the lines being adapted to delimit two substantially triangular corner flaps on the container or blank, a central line extending in the transversal direction, and two inclined intermediate lines interconnecting the triangle-delimiting lines with the central line, the intermediate lines extending outwards from the central portion and connecting with the triangle-delimiting lines at the end of the triangle delimiting-lines being closest to the central line in the transversal direction.
  • This configuration of sealing jaw can be used with the above-mentioned ultra sonic sealing or radio frequency heating.
  • the exact configuration could of course be complemented with ridges or cutouts to take into account the longitudinal seal and the difficulties that might occur in the transversal ends of the seal.
  • said lines form a continuous line.
  • the product- containing compartment of the packaging container is separated from the portion of the container forming the flaps.
  • the intermediate lines form substantially perpendicular angles with the triangle-delimiting lines.
  • this configuration is especially advantageous since it has been found that the container as such has an inherent desire to follow these fold lines, which in the end makes the final forming of the container especially easy.
  • the sealing jaw further comprises a straight sealing line extending across the sealing portion in the transversal direction, the sealing line being adapted to form a straight, continuous, transversal sealing across the whole transversal width of the blank or packaging container.
  • Fig 1 shows a filled packaging container.
  • Fig 2 shows the configuration of a preferred bottom sealing.
  • Fig 3 shows the first step of folding of the bottom according to a preferred method of folding the bottom.
  • Fig 4 shows two different configurations of heating zones and shows also the fold lines about which the flaps are folded.
  • Fig 5 shows the folded bottom.
  • Fig 6 shows a sealing jaw
  • Fig 7 shows a halfway folded bottom according to a preferred embodiment.
  • the packaging container 1 comprises a pillow- shaped body portion 2 with a straight, transversal sealing portion 3 and a folded bottom portion 4.
  • the packaging container 1 is produced basically according to a commonly known method, wherein the longitudinal edges of a continuous web is sealed to each other along a longitudinal seal 5 such that a continuous tube is formed.
  • the continuous tube is filled with the product, such as juice, milk or any other product with similar pouring properties. Thus, it could also be a granulate product or a more or less viscous liquid product.
  • the tube is divided into separate packages by continuously providing the tube with transversal sealings at an interval corresponding to the length of the packaging containers. In fig 1 one of these transversal sealings is shown in sealing portion 3.
  • the longitudinal seal 5 is an overlap seal where the two longitudinal edges 5a and 5b overlaps each other.
  • the packaging material comprises a paperboard layer
  • a plastic strip attached to the inside of the inner one 5b of the longitudinal edges located.
  • the strip extends a distance 5c, 5d on both sides of the edge of the inner one 5b of the longitudinal edges.
  • the strip prevents the edge of the paperboard from being in direct contact with the product. Thereby the so-called edge suction, i.e. the tendency of the paperboard to absorb the liquid, is avoided, which otherwise would destroy the appearance and strength of the container. This is a commonly known technique and will not be described in more details.
  • the packaging material is provided with crease lines, but as mentioned in the introductory part of the description this is not possible for all materials.
  • the transversal seal has been supplemented with a pattern of sealed fold lines 6a-e.
  • the inner sides of two opposing portions of the sidewall of the main body 2 are sealed to each other by using e.g. heat-sealing, i.e. partial melting of a plastic layer of the packaging material, or using some kind of adhesive.
  • This sealing of the fold lines 6a-e is accomplished along an edge portion 4 of the main body 2.
  • the edge portions located outside the fixed fold lines are refolded about the fixed fold lines 6a-e to form flaps that form the bottom 4 of the packaging container 1.
  • the pattern of fixed fold lines 6a-e defines two substantially triangular corner portions 7 and 8, whereby two side lines 7a-b, 8a-b of the triangular portions 7, 8 are formed by two essentially perpendicular edges of the container and the third side line is formed by a fixed fold line along which the inner sides of two opposing portions of the sidewall of the main body are fixed to each other.
  • a first side of these corner portions 7, 8 are adapted to abut the outside of the main body 2 and the other side are adapted to form a part of the bottom stand surface.
  • the fixed fold lines is formed by a continuous sealing comprising two inclined lines 6a, 6e located at the two transversal ends of the sealing portion 4, a central line 6c extending in the transversal direction, and two inclined intermediate lines 6b, 6d interconnecting the triangle-delimiting lines 6a, 6e with the central line 6c.
  • the intermediate lines 6b, 6d extend outwards from the central portion 6c towards the corner portions and connect with the triangle-delimiting lines 6a, 6e at the end of the triangle delimiting-lines 6a, 6e being closest to the central line 6c in the transversal direction and in the longitudinal direction closest to the edge 7b, 8b of the packaging container.
  • intermediate lines 6b, 6d forms substantially perpendicular angles with the triangle-delimiting lines 6a, 6e.
  • the central line 6c extends in spaced relationship substantially parallel with the bottom edge of the unfolded container.
  • the pillow shaped packaging container 1 is placed in a folding device wherein a pressure is applied to the main body 2 using pressure pads of some kind. Thereafter the corner flaps are initially folded towards one of the sides of the package about the fold lines 6a, 6e.
  • the to corner flaps 7, 8 are folded and fixed to the outside of the main body in a first folding step, as is shown in fig 3, whereby the fixation can be made in a plane state, which makes it easier to secure the quality of the sealing.
  • the corner flaps 7, 8 are only halfway folded, whereafter all the flaps formed by the complete folding pattern are folded more or less simultaneously.
  • the corner flaps 7 and 8 will be folded to abut the area marked in the upper right corner in fig 4.
  • the portion 7d, 8d of the corner flaps not marked i.e. the portion including the transversal seal
  • the corner flaps 7, 8 will be folded about line 6a and 6e out of the paper in fig 4 at the same time as the portion located between lines 9 and 10 and outside of line 6b, 6d, respectively, will be folded about line 6b and line 9 in the same direction as the flaps (i.e. out of the paper). Their connection outside the crossing between lines 6a and 6b respective 6d and 6e will be folded about line 9. Thus the central portion located outside the central line 6c will also be folded out of the paper about the central line 6c.
  • the corner defining fold lines 6a and 6e also extend in the same direction as the central line 6c. In the completely folded state the triangle defined by fold lines 6b, 9 and 10 is interposed between the surface (forward in fig 7) of the corner flaps and the outside of the main body of the packaging container.
  • the finally folded bottom has a substantially hexagonal cross-section.
  • the fold lines 6a-e extends along a single line of symmetry of the hexagonal cross-section, the line extending between two opposite corners of the stand surface.
  • the central portion is folded in the same direction as the corner flaps 7, 8.
  • the other half of the hexagonal cross-section is formed by the formation of natural fold lines corresponding to lines 9 and 10 on the other side of the packaging container.
  • These natural fold lines on the other side of the packaging container are created by the fact that at the portion of the triangle (defined by lines 9 and 10 and the edge) located outside the fixed intermediate fold line 6b, the two opposing sidewalls are fixed to each other. Since the outer portion of the opposing side is also rotated about the natural fold line 10 a corresponding natural fold line is also created on the opposite side.
  • the second half of the quadratic corners of the hexagonal stand surface is formed by folding of the opposing sidewall about the natural fold line corresponding to fold line 9.
  • the corner flaps 7 and 8 are folded and fixed in a first step whereafter the rest of the folding is completed.
  • the triangular flaps 7, 8 are not fixed to the outside about their complete area since there must be space for the triangle-shaped natural fold about the natural fold lines 9, 10.
  • the packaging container can be produced by a few different kinds of manufacturing methods.
  • a first method of producing a packaging container comprises the steps of; providing a web of packaging material, forming the web into a tube, filling a product, such as beverage, into the tube, dividing the filled tube into pillow shaped containers 1 by transversally sealing the tube at the portions corresponding to the ends 3, 4 of the final packaging container, providing the container with fixed fold lines 6a-e by fixing the inner sides of two opposing portions of the sidewall of the main body 2, along an edge portion 4 of the main body 2, to each other along fixed fold lines 6a-e, cutting the tube into pillow shaped individual containers at the transversal sealings, and folding the edge portions located outside the fixed fold lines 6a-e about the fixed fold lines 6a-e to form the bottom surface.
  • the step of transversally sealing the tube and providing the container with fixed fold lines 6a-e is accomplished in a single step, wherein the tube is locally compressed such that the inner sides contact each other along a transversal line 3, 4, and the inner sides are sealed to each other forming said transversal seal 3, 4 and said fixed fold lines 6a-e.
  • the fixed fold lines 6a-e are accomplished after the tube is divided into separate containers 1.
  • the tube is formed of two webs sealed to each other along their longitudinal edges.
  • a second method of producing a packaging container comprises the steps of; providing a tube-shaped blank of packaging material, sealing in a first step one end of the tube shaped blank, filling product, such as beverage, into the blank, sealing in a second step the other end of the tube shaped blank, providing the container with fixed fold lines by fixing the inner sides of two opposing portions of the sidewall of the main body, along an edge portion of the main body, to each other along fixed fold lines, folding the edge portions located outside the fixed fold lines about the fixed fold lines to form the bottom surface.
  • the first sealing step and the step of providing the container with fixed fold lines are accomplished in a single step.
  • the second sealing step and the step of providing the container with fixed fold lines are accomplished in a single step.
  • the blanks are formed of two webs sealed to each other along one longitudinal edge forming top or bottom and divided into blanks by transversal seals forming sides on the container.
  • the above-mentioned heat-sealing of the opposing portions of the side walls of the main body 2 of the packaging container 1 could e.g. be accomplished with ultra sonic heating of the packaging material, with radio frequency heating of the packaging material, or by printing black heat absorbent ink on the areas to be heated and heating these areas by illumination of the container with a lamp, such as a infra red lamp.
  • a lamp such as a infra red lamp
  • the fixed fold lines are accomplished by sealing the inner sides of the two opposite portions of the main body using an adhesive.
  • the adhesive could be pressure and/or heat activated.
  • a sealing jaw 11 adapted for radio frequency heating of the packaging material comprises a pressure surface 12 adapted to press the two opposing portions of the sidewalls of the main body against each other.
  • the sealing jaw 11 further comprises sealing portions 13a-e, 14 in the pressure surface 12.
  • the sealing portions 13a-e, 14 comprise some kind of electrical conductor connected to an electrical source.
  • electrical power is supplied to the conductors the magnetic filed around the conductor induces a current in the conductive layer in the packaging material, which in turn creates a local heating of the material.
  • this method is only applicable when the packaging material comprises a conductive layer as e.g. an aluminium layer.
  • the sealing portions 13a-e, 14 of the sealing jaw 11 are configured as ha been described above in respect of the packaging container 1 , i.e. a straight line 14 providing the container with a straight, conventional transversal sealing, and the system 13a-e of corner defining lines 13a, 13e, the central line 13c and the intermediate lines 13b, 13d.
  • the sealing portions 13a-e, 14 could be provided with ridges, slanted surfaces or any other suitable configuration to promote the formation of secure sealings.
  • the adhesive sealing could be combined with any kind of heat-sealing, e.g. radio frequency, ultra sonic or the infrared heating of preprinted areas.
  • packaging container of course not only can be used for liquids, but also for other substances with similar properties, such as powders and granulates.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Cartons (AREA)

Abstract

L'invention concerne un contenant (1) de conditionnement comprenant un corps principal (2) fermé sensiblement en forme de coussin et qui présente une surface support (4). Pour former un motif de lignes de pliage, les côtés intérieurs de deux parties opposées de la paroi latérale du corps principal (2) sont fixés entre eux, par une partie de bord (4) du corps principal (2), suivant des lignes de pliage fixes autour desquelles les parties de bord situées à l'extérieur des lignes de pliage fixes (6a-e) sont repliées pour former des rabats constituant la surface inférieure (4). L'invention concerne aussi des procédés de production d'un contenant de conditionnement de ce type, et un système d'étanchéité s'utilisant dans les procédés.
PCT/SE2003/000125 2002-02-01 2003-01-24 Contenant flexible comportant des lignes de pliage, decoupe pour ce contenant, procede de production de celui-ci et systeme d'etancheite WO2003064273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0200294-7 2002-02-01
SE0200294A SE0200294L (sv) 2002-02-01 2002-02-01 Förpackningsbehållare

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WO2003064273A1 true WO2003064273A1 (fr) 2003-08-07

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514681A (en) * 2013-05-15 2014-12-03 Birds Eye Ipco Ltd A method of packaging a product and means for carrying out the method
JP2016037310A (ja) * 2014-08-08 2016-03-22 大日本印刷株式会社 液体収納容器、その収納方法、外装容器と液体収納容器の組合体、およびその液体充填、注出方法
GB2532061A (en) * 2014-11-07 2016-05-11 Dubble Bubble Ltd Packaging system and method
CN110510161A (zh) * 2019-09-14 2019-11-29 青岛吉凯乐包装有限公司 一种包装材料及用其制作的容器
CN111511649A (zh) * 2017-12-11 2020-08-07 戈利奥有限公司 用于容纳呈液体、糊状、颗粒状或粉末状形式的散装材料的气密密封的扁平容器
WO2020260379A1 (fr) * 2019-06-28 2020-12-30 Tetra Laval Holdings & Finance S.A. Dispositif d'étanchéité et récipient de conditionnement tétraédrique

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GB930811A (en) * 1961-04-14 1963-07-10 William Nebeker Jardine Containers for fluid material
US3552087A (en) * 1967-06-29 1971-01-05 William S Schneider Method of making dispensing containers
FR2643340A1 (fr) * 1989-02-22 1990-08-24 Paulze D Ivoy Roland Poche en matiere souple thermo-soudable, et procede de realisation d'une telle poche et de conditionnement simultane d'un produit
EP0917946A2 (fr) * 1997-11-20 1999-05-26 Orihiro Engineering Co., Ltd. Machine pour fabriquer, remplir et fermer des sachets tenant debout

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
GB930811A (en) * 1961-04-14 1963-07-10 William Nebeker Jardine Containers for fluid material
US3552087A (en) * 1967-06-29 1971-01-05 William S Schneider Method of making dispensing containers
FR2643340A1 (fr) * 1989-02-22 1990-08-24 Paulze D Ivoy Roland Poche en matiere souple thermo-soudable, et procede de realisation d'une telle poche et de conditionnement simultane d'un produit
EP0917946A2 (fr) * 1997-11-20 1999-05-26 Orihiro Engineering Co., Ltd. Machine pour fabriquer, remplir et fermer des sachets tenant debout

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514681A (en) * 2013-05-15 2014-12-03 Birds Eye Ipco Ltd A method of packaging a product and means for carrying out the method
JP2016037310A (ja) * 2014-08-08 2016-03-22 大日本印刷株式会社 液体収納容器、その収納方法、外装容器と液体収納容器の組合体、およびその液体充填、注出方法
GB2532061A (en) * 2014-11-07 2016-05-11 Dubble Bubble Ltd Packaging system and method
CN111511649A (zh) * 2017-12-11 2020-08-07 戈利奥有限公司 用于容纳呈液体、糊状、颗粒状或粉末状形式的散装材料的气密密封的扁平容器
US11040813B2 (en) * 2017-12-11 2021-06-22 Goglio S.P.A. Hermetically sealed flat containers for containing loose materials in liquid, pasty, granular, or powder form
CN111511649B (zh) * 2017-12-11 2022-09-13 戈利奥有限公司 用于容纳呈液体、糊状、颗粒状或粉末状形式的散装材料的气密密封的扁平容器
WO2020260379A1 (fr) * 2019-06-28 2020-12-30 Tetra Laval Holdings & Finance S.A. Dispositif d'étanchéité et récipient de conditionnement tétraédrique
EP3756864A1 (fr) * 2019-06-28 2020-12-30 Tetra Laval Holdings & Finance S.A. Dispositif d'étanchéité et récipient d'emballage
CN110510161A (zh) * 2019-09-14 2019-11-29 青岛吉凯乐包装有限公司 一种包装材料及用其制作的容器

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