WO2002072446A1 - Lamine d'emballage, procede de fabrication d'un contenant d'emballage et contenant d'emballage - Google Patents

Lamine d'emballage, procede de fabrication d'un contenant d'emballage et contenant d'emballage Download PDF

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Publication number
WO2002072446A1
WO2002072446A1 PCT/SE2002/000436 SE0200436W WO02072446A1 WO 2002072446 A1 WO2002072446 A1 WO 2002072446A1 SE 0200436 W SE0200436 W SE 0200436W WO 02072446 A1 WO02072446 A1 WO 02072446A1
Authority
WO
WIPO (PCT)
Prior art keywords
ply
packaging
packaging laminate
thermoplastic material
sealing
Prior art date
Application number
PCT/SE2002/000436
Other languages
English (en)
Inventor
Salvatore Capasso
André CHIQUET
Original Assignee
Tetra Laval Holdings & Finance Sa
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 Sa filed Critical Tetra Laval Holdings & Finance Sa
Priority to JP2002571376A priority Critical patent/JP3963838B2/ja
Priority to US10/471,565 priority patent/US20040142130A1/en
Priority to EP02703024A priority patent/EP1370474A1/fr
Publication of WO2002072446A1 publication Critical patent/WO2002072446A1/fr
Priority to US11/976,065 priority patent/US20080041021A1/en

Links

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
    • 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
    • B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
    • B65D75/44—Individual packages cut from webs or tubes
    • B65D75/48—Individual packages cut from webs or tubes containing liquids, semiliquids, or pastes, e.g. cushion-shaped packages
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • 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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/40—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete 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
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • 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
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
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    • 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
    • B29C66/72327—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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/7234—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 barrier layer
    • B29C66/72341—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 barrier layer for gases
    • 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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • 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
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the invention relates to a packaging laminate for a packaging container, preferably for liquid food contents, which packaging laminate comprises a structural base layer, and an inside layer.
  • the invention also relates to a method of producing a packaging container from the packaging laminate, and to the packaging container built up from the packaging laminate.
  • Food packaging processes of today (with the term “food” is meant all sorts of solid and liquid food, such as juices, milk and other beverages as well as pastes, soups, jellies and cheese) often are of the "form-fill-seal" type and may be carried out by shaping a continuously moving web-shaped packaging laminate made of a flexible laminate into a continuously running tube, continuously filling the tube with the desired food product to be packaged and by sealing and finally cutting off sealed packages from the tube.
  • the packaging processes are often high speed continuous processes, wherein the packaging laminate in the form of a web is continuously fed through a machine, sterilised, for example by passing through a liquid or gas-phase quick- acting sterilising medium, formed and sealed into the required tube-shape for being filled with the food to be packaged and finally transversally sealed.
  • the continuous web-shaped packaging laminate is manufactured with a packaging laminate manufacturing machine and placed on a reel.
  • the packaging laminate often has a laminated structure comprising a base layer of paper or paperboard, an outer heat sealing layer of a thermoplastic polymer (such as for example polyethylene) on each side of the core layer and, if necessary, an aluminium foil gas-barrier layer interposed between the paper core layer and the film.
  • a gas-barrier layer of a plastic or inorganic material such as for example polyamide, polyethylene vinylalcohol (EVOH) or siliconoxide, may be employed instead of aluminium foil.
  • the reel with packaging laminate is installed in the packaging machine where it is reeled out and routed within the packaging machine using drive mechanisms disposed in several positions in the machine.
  • the packaging laminate web is shaped into a tube and sealed in the longitudinal direction within the packaging machine. While the tube is being transferred downward within the. packaging machine, the liquid or flowing food product is supplied from above to fill the inside of the tubular packaging laminate. Next, the packaging laminate tube is pressed laterally from both sides and sealed in the lateral direction at specified intervals to form interconnected, filled and sealed packaging containers.
  • the sealed packaging containers are separated off from the tube by cutting between the laterally extending sealed portions, and the thus separated packaging containers are brought into a specified, desired shape, for example by folding and bending along previously formed crease lines in the packaging laminate, and, if required, finally sealed in order to remain in that shape.
  • the sealing of the tubular packaging laminate in the longitudinal or lateral direction is carried out by heat sealing of the outer surfaces of the packaging laminate, which are made of heat sealing thermoplastic, to each other.
  • This may be performed by known heat sealing techniques, such as for example induction heat sealing, radio frequency (RF) or microwave heat sealing, heat convection sealing or ultrasonic vibration heat sealing.
  • RF radio frequency
  • the sealing apparatus is normally provided with so-called counter jaws and heat seal jaws disposed and working in opposing relation to each other.
  • One preferred method of performing the transversal seal when no metallic layer is present in the laminate, is to use ultrasonic energy while simultaneously applying a pressure, in order to melt the sealing layer while overlapping and pres- sing together two edges of the laminate to a seal.
  • the amount of ultrasonic energy converted into heat is proportional to the pressure applied on the laminate in the area of the seal.
  • These settings are settings such as the tube guiding, the movement of the anvil jaws that provide the pressure for the seal and the parallelism between the ultrasonic horns and the cutting rails for cutting off the tube between the transversal seals.
  • the pressure applied will be poor at some locations and hence the energy converted into heat will be low and the produced seal will be weak and not liquid-tight.
  • the ultrasonic vibration heat sealing process can be very unforgiving in other respects too, such as the presence of foreign matter at the area of the seals, when used on a conventional packaging laminate.
  • Another very important aspect to consider is requirements on the laminate material when the packaging is to be filled with liquid food, such as milk, juice, water etc.
  • the problem of weak seals due to poor tolerances in the mechanical settings will be especially pronounced due to the. overlap with the longitudinal seal.
  • the one of the anvil jaws is provided with a compensation profile, which however means that it is even more important to have small tolerances. If the extra thick overlap between the transversal seal and the longitudinal seal is displaced in relation to the compensation profile, e.g. due to problems in the continuous tube guiding such as twist of the tube, the pressure will drop in certain areas of the seal and hence the strength of the seal will negatively affected. A weak seal can lead to channels being formed and thus to leaking packages.
  • the object of the present invention is to provide a packaging laminate which is more forgiving to the prevailing circumstances during sealing by ultra- sonic energy, and which preferably also exhibits improved mechanical properties.
  • the object is to provide a packaging laminate which is more forgiving to prevailing circumstances such as poor tolerances in the mechanical settings of the sealing machine, poor tube guiding, disturbed movements of the anvil jaws, poor parallelism between the ultrasonic horns and the cutting rails, presence of foreign matter in the area of the seals, etc.
  • the prime object of the invention is to provide strong and liquid- tight transversal seals in packaging containers produced from the packaging laminate according to the invention, also at the overlaps between the transversal seals and the longitudinal seal in the packaging container.
  • the packaging laminate according to the invention should be well adapted to be used in packaging containers for food.
  • packaging laminate of the invention as defined in claim 1
  • method according to the invention as defined in claim 11
  • packaging container produced from the packaging laminate, as defined in claim 16.
  • the general concept of the invention is to provide a packaging laminate which is very forgiving to the sealing circumstances due to the fact that it is provided with an inside layer comprising a sealing ply of a heat sealable thermoplastic material (polyolefin), which sealing ply is arranged to be the outermost ply on one side of the laminate and intended to be arranged on the inside of the container.
  • this sealing ply is a heat sealable thermoplastic material, which material exhibits a melt enthalpy lower than 115 J/g, preferably lower than 105 J/g and even more preferred lower than 95 J/g, but normally at least 40 J/g and preferably at least 50 J/g.
  • metallocene polyethylene materials preferably a metallocene low density polyethylene material and even more preferred a metallocene linear low density polyethylene material.
  • Affinity PL1880 by Dow.
  • Other conceivable materials in the same group are other Affinity grades by Dow as well as Exceed ML 1023 by ExxonMobil, Exact by ExxonMobil, Elite by Dow, Umerit by JPO and Kernel by JPC.
  • the low melt enthalpy heat sealable thermoplastic sealing ply exhibits a melt enthalpy which is lower than the melt enthalpy of an adjacent thermoplastic ply in the inside layer, and preferably lower than the melt enthalpy of any of the plies in the inside layer.
  • melt enthalpy will preferably mean at least 10 J/g, even more preferred at least 15 J/g lower and most preferred at least 20 J/g lower.
  • the melt enthalpy is decreased in each step when going through the different plies in the direction from the base layer to the outermost ply, although some adjacent plies may have the same melt enthalpy.
  • the packaging laminate is brought to exhibit a sealing window having a lowermost limit which is lower than the corresponding limit of conventional packaging laminates.
  • the laminate according to the invention comprising the heat sealable thermoplastic sealing ply, exhibits a broad sealing window, preferably a broader sealing window than conventional packaging materials.
  • the sealing window concept is well known by the skilled man and is defined as the energy range within which sealing is possible.
  • a low lowermost limit means that an acceptable seal takes place at low energy levels, which in turn decreases the sensibility of the ultrasonic vibration heat sealing system to the mechanical settings and to other prevailing circumstances.
  • the inside layer also comprises a ply consis- ting of so called C4, C6 or C8 linear low density polyethylene (C4 LLDPE, C6 LLDPE, C8 LLDPE).
  • C4, C6 and C8 LLDPE are polyethylenes which are obtained by small quantities of C4, C6 or C8 alpha olefins being used as comonomers during the polyjnerisation of ethylene.
  • this C4, C6 or C8 LLDPE ply, and even more preferred a C6 or G8 LLDPE ply is the second ply as counted from the outer surface of the laminate, i.e.
  • a laminate according to the invention is especially well adapted to be used in connection with ultrasonic vibration heat sealing.
  • a feature of the ultrasonic vibration heat sealing technique is that the entire material under pressure between the ultrasonic horn and the anvil jaw is heated up by the vibrations at the same time. For a strong seal to take place, it is enough that the outermost layer (i.e. the outermost layer on the side of the laminate that is facing the inside of the container) reaches the melting point.
  • FIG. 1 is showing a preferred embodiment of a packaging laminate according to the invention, as seen in cross section
  • Fig. 2 illustrates a conventional process of forming a tube from a continuous web of packaging laminate and the further formation of packaging containers, involving a step of transversal sealing
  • Fig. 3 is showing an overlap between a longitudinal seal and a transversal seal, as seen in cross section
  • Fig. 4 is showing a conventional anvil jaw for the sealing process, as seen in perspective.
  • Fig. 5 is showing a force-elongation curves for transversal seals in a packaging container according to the invention as compared to a reference container
  • Fig. 6 is showing the resulting transversal seal width for different packaging containers as a function of tube position in relation to anvil jaw.
  • Fig. 7 is showing the sealing window for the laminates which were tested.
  • Fig. 1 is showing a preferred embodiment of a packaging laminate 10 according to the present invention.
  • a structural base layer in the laminate consists of a paper or paperboard layer 4. It is however also conceivable that the structural base layer consists of mineral-filled polyolefin, e.g. mineral-filled polypropylene.
  • the structural base layer is the layer which gives the largest bulk and thickness contribution to the laminate 10.
  • an inside layer 6 built up from at least one ply, preferably at least two plies, and up to six plies, here four plies.
  • the structural base layer 4 exhibits a thickness which is at least 6 times, preferably at least 8 times and even more preferred at least 10 times as thick as said inside layer 6.
  • the structural base layer has a thickness of at least 200 ⁇ m, preferably at least 250 ⁇ m and even more preferred at least 300 ⁇ m.
  • a first ply 1 in the inside layer 6 consists of a first thermoplastic material
  • said first ply is a polyethylene (PE) ply, preferably a low density polyethylene (LDPE) ply and even more preferred a linear low density polyethylene (LLDPE) ply, exhibiting a grammage of 3-30 g/m 2 , preferably 4-10 g/m 2 and even more preferred 5-8 g/m 2 .
  • PE polyethylene
  • LLDPE linear low density polyethylene
  • said first ply is a so called C4, C6 or C8 LLDPE ply, most preferred a C6 or C8 LLDPE ply.
  • said inside layer 6 also comprises a second ply 2, also denoted sealing ply 2-, of a second heat sealable thermoplastic material (polyolefin), which second ply is arranged to be the outermost layer on the side of the laminate which is intended to face the inside of the packaging container.
  • the second thermoplastic material in the second ply 2 is different from said first thermoplastic material and exhibits a low melt enthalpy according to the above. Due to the fact that it is enough that the outermost layer 2 reaches the melting point in order for a strong seal to be produced, the second ply 2 does not need to exhibit a grammage larger than 10 g/m 2 .
  • said inside layer 6 also comprises a third ply 3 of a thermoplastic material (polyolefin).
  • the third ply too is a polyethylene (PE) ply, preferably a low density polyethylene (LDPE) ply, and exhibits a grammage of 10-30 g/m 2 , preferably 15-25 g/m 2 .
  • the third ply 3 is arranged in-between said first ply 1 and said structural base layer 4 in the packaging laminate 10.
  • the inside layer (6) may also comprise a fourth ply (7) of a thermoplastic material, which fourth ply preferably is a low density polyethylene (LDPE) ply. It might however also be conceived that it can be a linear low density (LLDPE) ply.
  • this fourth ply 7 may per se consist of 1-5 sub- plies of identical material.
  • the fourth ply 7 exhibits a total grammage of 5-30 g/m 2 , preferably 8-20 g/m 2 and even more preferred 10-15 g/m 2 . It is arranged in direct contact with said first, ply 1 on the opposite side of the second ply 2 in the laminate 10, i.e. in-between the first ply 1 and the third ply 3.
  • the beneficial properties of the second ply 2 will allow decreased grammages of the first 1 , third 3 and fourth 7 plies, thus counteracting an increased cost due to the material of the second ply 2 being relatively expensive.
  • a decor layer 5 preferably consisting of a polyethylene (PE) ply, preferably a low density polyethylene (LDPE) ply, which exhibits a grammage of 5-25 g/m 2 , preferably 8-20 g/m 2 .
  • PE polyethylene
  • LDPE low density polyethylene
  • the base layer 4, ipcluding the decor layer 5, is provided as a web on a reel.
  • a film which includes the first ply 1 of thermoplastic material together with the second 2 and fourth 7 ply of thermoplastic material Lamination between the materials on the two reels preferably takes place by the third 3 ply of thermoplastic material being extruded in-between the web and the film, in a conventional laminator.
  • the three-ply film including the first ply 1 , the second ply 2 and the fourth ply 7 of thermoplastic material may have been manufactured in the form of e.g. an extrusion blown film or an extrusion cast film.
  • Another technique . of producing the packaging laminate according to the invention is to extrusion coat the base layer with the different plies of the inside layer 6, preferably by coextrusion technique.
  • the different plies and layers in the inside layer and the laminate are joined to one another directly or indirectly over essentially the whole of their surfaces facing one another.
  • a second ply of the second thermoplastic material which is only arranged at the area of the laminate where the transversal seals are to be formed, i.e. a second ply in the form of a strip or a partial ply.
  • packaging laminate according to the invention is especially developed not to include any further plies or layers, except the above described ones, it is of course possible, though not preferred, that other types of plies or layers are present too, such as barrier layers.
  • a web-shaped flexible packaging laminate 10 is installed as a reel 21 in the .packaging machine where it is reeled out and routed within the packaging machine using drive mechanisms (not specifically shown) disposed in several positions in the machine.
  • the packaging laminate 10 is guided with the aid of a guide 22, sealed in the longitudinal direction with a sealing apparatus (not specifically shown) and formed into a tube 23. While the tube 23 is being transferred downward within the packaging machine, the liquid or flowing product is supplied from above through a filler pipe 24 to fill the inside of the tube.
  • the packaging laminate of the tube is laterally pressed from both sides with a counter jaw and a heat sealing jaw (not specifically shown) so that the tubular packaging laminate is sealed in the lateral direction at specified . intervals to form interconnected, filled and sealed pillow-shaped packaging containers.
  • the sealed packaging containers are separated off, as individual pillow-shaped primary containers 25, from the tube by cutting between the laterally extending sealed portions.
  • Fig. 3 there is shown, in cross section, an overlap between a longitudinal seal 31 , which extends out of the plane in the figure, and a transversal seal 32, which extends in the plane of the figure.
  • the tube which is formed by the longitudinal seal 31 is pressed together so that two outermost second plies 2, now arranged at the inside of the tube, will face each other.
  • a sealing strip 34 is arranged over the inner seam 33 of the longitudinal seal, which sealing strip preferably is constituted by a polypropylene strip.
  • the most critical areas for a correct transversal seal are called zone 1 (z1 ) and zone 2 (z2).
  • the anvil jaws 40 are conventionally, and preferably also in connection with the present invention, provided with a compensation profile 41 , such as shown in Fig. 4.
  • the compensation profile 41 consists of a recess, having edges 42 adapted to correspond to the width (w) of the overlap, shown in Fig. 3.
  • the position (or rotation) of the tube in relation to the anvil jaws is defined by the value of d, Fig. 3, which is the distance between a counter mark setting X on the anvil jaw 40, in the middle of compensation profile 41 , and the thickness step in zone 1.
  • the transversal sealing process is performed by supply of energy, preferably ultrasonic energy, at the same time as the tube is mechanically pressed together between two anvil jaws.
  • energy preferably ultrasonic energy
  • one of the anvil jaws is provided with ultrasonic horns, arranged to be pressed against the tube with the other anvil jaw as holder-on, for supply of the ultrasonic energy.
  • the pressing and providing of energy is performed during a time interval of 100-250 milliseconds, preferably 140-220 milliseconds and with a pressure of 1-10 MPa.
  • an inside layer in a laminate according to the invention may comprise different numbers of plies, meaning that the first ply 1 , the fourth ply 7 or the third ply 3 may be the ply which is arranged in direct contact with-the second sealing ply 2.
  • a force-elongation curve i.e. maximum tensile load
  • the corresponding curve for L1 is dotted.
  • the strength of the L1 seal is dramatically improved in relation to the reference. This can be attributed to the beneficial combination of the low melt enthalpy sealing ply and the strong C6 LLDPE middle ply.
  • Fig. 6 there is shown the resulting transversal seal width in zone 1 as a function of tube position in relation to the anvil jaw, for different packaging containers produced from the three laminates according to the invention and from the reference laminate.
  • d see Fig. 3 and the related description. It can be seen that at least for L1 -and L3, a much worse positioning could be allowed as compared to the reference.
  • Fig. 7 there is ' shown the sealing window for the laminates which were tested in the examples.
  • the laminates L1 and L3 are the best embodiments of the invention, since these laminates exhibit the lowermost lower limit in the sealing window and also relatively broad sealing windows.
  • the invention is however not limited by the description of preferred embodiments, but may be varied within the scope of the claims.

Abstract

L'invention concerne un laminé d'emballage (10) destiné à un contenant d'emballage. Ce laminé d'emballage comprend une couche de base structurelle (4), et une couche interne (6). Selon l'invention, cette couche interne (6) comprend un jet de scellement (2) réalisé dans un matériau thermoplastique thermoscellable, ce jet de scellement étant conçu pour être l'ultime couche externe d'une face du laminé (10), destinée à être placée sur la face interne du contenant, ce matériau thermoplastique thermoscellabe présentant une enthalpie de fusion inférieure à 115 J/g. L'invention concerne également un procédé de production de contenant d'emballage à partir du laminé d'emballage, et un contenant d'emballage produit à partir du laminé d'emballage.
PCT/SE2002/000436 2001-03-12 2002-03-11 Lamine d'emballage, procede de fabrication d'un contenant d'emballage et contenant d'emballage WO2002072446A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2002571376A JP3963838B2 (ja) 2001-03-12 2002-03-11 包装用積層品、包装容器の製法及び包装容器
US10/471,565 US20040142130A1 (en) 2001-03-12 2002-03-11 Packaging laminate, method of producing a packaging container and the packaging container
EP02703024A EP1370474A1 (fr) 2001-03-12 2002-03-11 Lamine d'emballage, procede de fabrication d'un contenant d'emballage et contenant d'emballage
US11/976,065 US20080041021A1 (en) 2001-03-12 2007-10-19 Packaging laminate, method of producing a packaging container and the packaging container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0100858-0 2001-03-12
SE0100858A SE0100858D0 (sv) 2001-03-12 2001-03-12 Packaging laminate, method of producing a packaging container and the packaging container

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/976,065 Division US20080041021A1 (en) 2001-03-12 2007-10-19 Packaging laminate, method of producing a packaging container and the packaging container

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Publication Number Publication Date
WO2002072446A1 true WO2002072446A1 (fr) 2002-09-19

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US (2) US20040142130A1 (fr)
EP (1) EP1370474A1 (fr)
JP (1) JP3963838B2 (fr)
SE (1) SE0100858D0 (fr)
WO (1) WO2002072446A1 (fr)

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US20040142130A1 (en) 2004-07-22
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JP2004528235A (ja) 2004-09-16
EP1370474A1 (fr) 2003-12-17
SE0100858D0 (sv) 2001-03-12

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