ES2986197T3 - Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada - Google Patents

Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada Download PDF

Info

Publication number
ES2986197T3
ES2986197T3 ES21158603T ES21158603T ES2986197T3 ES 2986197 T3 ES2986197 T3 ES 2986197T3 ES 21158603 T ES21158603 T ES 21158603T ES 21158603 T ES21158603 T ES 21158603T ES 2986197 T3 ES2986197 T3 ES 2986197T3
Authority
ES
Spain
Prior art keywords
bag
face
gussets
temperature
welding
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
ES21158603T
Other languages
English (en)
Inventor
Eric Valette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coveris Flexibles France SA
Original Assignee
Coveris Flexibles France 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=72266360&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2986197(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Coveris Flexibles France SA filed Critical Coveris Flexibles France SA
Application granted granted Critical
Publication of ES2986197T3 publication Critical patent/ES2986197T3/es
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/5057—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 positioned between the surfaces 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
    • 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
    • B29C65/5064—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 of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5071—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 of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas 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
    • B29C66/006—Preventing damaging, e.g. 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
    • B29C66/01—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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • B29C66/1352—Single hem to hem 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
    • 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
    • B29C66/731—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
    • 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
    • B29C66/70—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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • 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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91933—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined higher than said fusion temperature
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • 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
    • B29C66/73—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
    • B29C66/73116—Melting point of different melting point, i.e. the melting point of one of the parts to be joined being different from the melting point of the other part
    • 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
    • B29C66/7313—Density
    • 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
    • B29C66/7313—Density
    • B29C66/73132—Density of different density, i.e. the density of one of the parts to be joined being different from the density of the other part
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73712—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented mono-axially
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)

Abstract

La invención se refiere a un procedimiento de fabricación de una bolsa de embalaje (1) que comprende al menos una pared frontal (2) y una pared trasera (3), opcionalmente conectadas mediante fuelles (4), un fondo (5) y una abertura de llenado (6), implicando el procedimiento la realización de al menos una línea de soldadura en al menos una de las paredes frontal (2) o trasera (3). Según la invención, la bolsa (1) está fabricada a partir de al menos una película de plástico (7) que presenta una cara interior (8) destinada a ser colocada en el interior de la bolsa (1) y una cara exterior (9) destinada a ser colocada en el exterior de la bolsa (1), y cuya diferencia entre la temperatura de reblandecimiento de la cara exterior (9) y la temperatura de fusión de la cara interior (8) está comprendida entre 20°C y 60°C, de manera que la línea de soldadura se produce a una temperatura de soldadura difusa comprendida entre la temperatura de reblandecimiento de la cara exterior (9) y la temperatura de fusión de la cara interior (8), mediante un dispositivo de estampación en caliente (10) aplicado sobre la cara exterior (9) fundiendo la cara interior (8) sin reblandecer ni degradar la cara exterior (9). (Traducción automática con Google Translate, sin valor legal)

Description

DESCRIPCIÓN
Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada
Campo técnico
La invención se refiere al sector técnico de las bolsas de embalaje de material plástico, tales como por ejemplo bolsas para el embalaje de productos alimenticios.
De forma más particular, la invención encuentra una aplicación ventajosa en el campo de las bolsas de material plástico flexible, en particular obtenidas a partir de una banda de una película de espesor inferior a 200 |jm, aproximadamente.
Este tipo de bolsas comprende al menos, y de una manera perfectamente conocida, una pared delantera y una pared trasera cuyos bordes laterales posiblemente se conectan por fuelles, un fondo y una abertura de llenado. La invención se refiere más particularmente a un procedimiento de fabricación de una bolsa de embalaje de este tipo, así como a una bolsa de embalaje perfeccionada.
Técnica anterior
Se conoce de la técnica anterior un procedimiento de fabricación de una bolsa de embalaje que comprende al menos una pared delantera y una pared trasera, posiblemente conectadas por fuelles, un fondo y una abertura de llenado.
De una manera general, la bolsa se fabrica a partir de al menos una película plástica constituida de un complejo de OPP/PE o de PET/PE, con en ambos casos el PE situado para formar una cara interna de la película y por tanto el interior de la bolsa y el PET o el OPP situado para formar la cara externa de la película y por tanto el exterior de la bolsa.
Por otro lado, y siempre de una manera clásica, el procedimiento de fabricación de la bolsa implica la realización de al menos una línea de soldadura sobre al menos una de las paredes delantera o trasera de la bolsa. En el estado de la técnica, esta línea de soldadura se realiza por medio de un dispositivo de estampado en caliente aplicado sobre la cara externa y con tendencia a degradar visualmente dicha cara externa.
Por otro lado, las bolsas realizadas a partir de un complejo de OPP/PE o PET/PE presentan el inconveniente de ser difícilmente reciclables por las técnicas de reciclado mecánico.
El documento EP0135649 describe un procedimiento de fabricación de una bolsa de embalaje cuya capacidad de reciclado puede facilitarse.
Descripción de la invención
Uno de los objetivos de la invención es por tanto remediar los problemas citados anteriormente proporcionando un procedimiento de fabricación de una bolsa de embalaje, así como una bolsa de embalaje cuyas calidades visuales y estéticas no se degraden tras las diferentes operaciones de soldadura realizadas para formar la bolsa.
Otro objetivo es proporcionar dicha bolsa cuyo reciclado mecánico se facilite.
Para resolver los problemas citados anteriormente, se ha puesto a punto un procedimiento de fabricación de acuerdo con el objeto de la reivindicación 1.
De lo anteriormente expuesto, el procedimiento de fabricación es simple, las líneas de soldadura se efectúan actuando únicamente sobre la cara externa de la película, sin dañar la estética de la bolsa.
Este intervalo de temperatura se selecciona por el solicitante ya que, además de la ventaja mencionada anteriormente, la misma permite seleccionar materiales para las caras externa e interna de la película que tienen un comportamiento relativamente similar y homogéneo. De ello se deduce que la compatibilidad entre los materiales permite facilitar el reciclado mecánico de la bolsa. Por otro lado, las caras interna y externa de la bolsa son bastante parecidas, lo que mejora la estética general de la bolsa.
Según la invención, la película plástica es multicapa bajo la forma de un complejo, y con el fin de permitir la capacidad de reciclado de la película plástica, está realizada en un solo material. En esta configuración, la estética es óptima y el reciclado mecánico puede asegurarse de una manera simple.
Son posibles varias técnicas para ajustar las temperaturas de ablandamiento de la cara externa y de fusión de la cara interna para que la diferencia esté comprendida entre 20 °C y 60 °C. Por ejemplo, la densidad de la cara interna puede ser inferior a la densidad de la cara externa. Por ejemplo, la densidad de la cara interna puede por ejemplo estar comprendida entre 0,8 g/cm3 y 0,92 g/cm3, excluyendo aditivos y la densidad de la cara externa puede estar comprendida entre 0,92 g/cm3 y 0,97 g/cm3.
Cuando se habla de “cara externa” o “cara interna” para una película constituida de una sola capa, se habla de un máximo de un 50% de su espesor, con preferencia un 15%.
Para diferenciar las densidades entre la cara externa y la cara interna de una película multicapa y de un solo material, es posible jugar en especial con el estiramiento del material. En otras palabras, la cara externa puede estar constituida de un material polímero estirado monoaxialmente o biaxialmente con el fin de aumentar su densidad.
El hecho de estirar el polietileno implica que hace falta más energía para ablandar la capa externa y finalmente hacerla fundir. Un tiempo de fusión demasiado largo y/o una temperatura demasiado elevada son por tanto necesarios para realizar una fusión de dicha capa externa, lo que le permite resistir de manera óptima las operaciones de soldadura, sin degradarse.
Según modos de realización particulares, la temperatura de ablandamiento de la cara externa está comprendida entre 120 °C y 140 °C, con preferencia 130 °C, la temperatura de fusión de la cara interna está comprendida con preferencia entre comprendida entre 80 °C y 100 °C, con preferencia 90 °C.
En un modo de realización particular del procedimiento, y durante la formación de la bolsa, los fuelles pueden, de una manera conocida, replegarse longitudinalmente sobre sí mismos e insertarse entre las paredes delantera y trasera de la bolsa. En otra configuración, los fuelles pueden estar acoplados. Las líneas de soldadura que permiten por tanto fijar los fuelles a las paredes delantera y trasera, se realizan por tanto a lo largo de los bordes longitudinales de los fuelles, los cuales descansan uno sobre el otro, por un dispositivo de estampado en caliente que actúa únicamente sobre las paredes delantera y/o trasera.
En esta configuración, y con el fin de evitar cualquier riesgo de deterioro de la cara externa de la bolsa durante la realización de las soldaduras de los fuelles, el procedimiento según la invención prevé que una banda de material con propiedad de aislamiento térmico, por ejemplo de politetrafluoroetileno, puede disponerse entre los bordes longitudinales de los fuelles plegados para que, durante la operación de soldadura, dichos bordes longitudinales descansen cada uno sobre, y en especial a ambos lados, de la banda.
La invención se refiere también a una bolsa de embalaje según la reivindicación 9.
Descripción de las figuras
Otras ventajas y características de la invención quedarán más claras a partir de la descripción siguiente, dada a título de ejemplo no limitativo, a partir de las figuras adjuntas en las cuales:
La figura 1 es una representación esquemática que ilustra en perspectiva una bolsa según la invención. La figura 2 es una representación esquemática que ilustra una película monocapa que presenta un gradiente de densidad en su espesor.
La figura 3 es una representación esquemática que ilustra una película multicapa cuya cara interna presenta una densidad inferior a la de la cara externa.
La figura 4 es una representación esquemática que ilustra la soldadura de los bordes longitudinales de un fuelle.
La figura 5 es una representación esquemática similar a la de la figura 4, una banda de material con propiedades de aislamiento térmico que se sitúa entre los bordes longitudinales del fuelle plegados uno sobre el otro.
Descripción detallada de la invención
Con referencia a la figura 1, la invención se refiera un procedimiento de fabricación de una bolsa (1) del tipo que comprende, y de una manera conocida, al menos, una pared (2) delantera y una pared (3) trasera, cuyos bordes laterales están posiblemente conectados por fuelles (4), un fondo (5) y una abertura (6) de llenado.
El procedimiento que permite conformar la bolsa (1) como tal es conocido del estado de la técnica y puede realizarse de varias maneras posibles. No se describirá más en detalle.
Con referencia a la figura 3, la invención se centra más particularmente en el hecho de que la bolsa (1) fabricada a partir de una película (7) plástica que presenta una cara (8) interna destinada estar situada en el interior de la bolsa (1) y una cara (9) externa destinada estar situada en el exterior de la bolsa (1), cuya diferencia entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna está comprendida entre 20 °C y 60 °C.
Por tanto, cuando se necesita realizar una línea de soldadura durante la operación de fabricación de la bolsa (1), por ejemplo para cerrar el fondo (5) y/o la abertura (6) de la bolsa (1) y para rigidizar los bordes de los fuelles (4) en las paredes delantera (2) y trasera (3), dicha línea de soldadura se realiza a una temperatura de soldadura difusa comprendida entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna.
De este modo, la soldadura se realiza haciendo fundir únicamente la cara (8) interna de la película (7), sin ablandar ni degradar estéticamente la cara (9) externa.
La línea de soldadura se realiza por cualquier técnica apropiada bien conocida y en especial por medio de un dispositivo (10) de estampado en caliente. El dispositivo (10) de estampado en caliente se utiliza con un tiempo de contacto sobre la cara (9) externa de la película (7) inferior a 1 s y por ejemplo comprendido entre 100 ms y 600 ms. La temperatura de soldadura difusa es diferente de la temperatura de regulación del dispositivo (10) de estampado en caliente. A título de ejemplo, el dispositivo (10) puede estar regulado a una temperatura de 150 °C y, con el tiempo de contacto, la inercia y las pérdidas de calor, la temperatura de soldadura difusa puede ser de 115 °C.
Con referencia a la figura 2, y según un modo de realización no cubierto por las reivindicaciones, la película (7) plástica está constituida de una única capa.
En esta configuración, cuando se habla de cara (9) externa o de cara (8) interna, se habla, para cada cara, de un máximo de un 50% del espesor de la película (7).
Con el fin de obtener una diferencia entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna comprendida entre 20 °C y 60 °C, la película (7) comprende una cara (8) interna cuya densidad es por ejemplo inferior a la de la cara (9) externa. En otras palabras, la película (7) puede presentar un gradiente de densidad en su espesor, la densidad que aumenta desde la cara (8) interna hacia la cara (9) externa.
Con referencia a la figura 3, y según la invención, la película (7) plástica que constituye la bolsa (1) tiene la forma de un complejo, por tanto multicapa.
Según la invención, para tener densidades diferentes, pero permitiendo la capacidad de reciclado de la película (7), la película (7) es multicapa y no de un solo material. Para obtener la diferencia de densidad deseada, el material utilizado para constituir la cara (9) externa puede ser estirado monoaxialmente o biaxialmente, por ejemplo en una relación comprendida entre 3:1 y 10:1, para aumentar su densidad con respecto al mismo material, no estirado, utilizado para constituir la cara (8) interna. La película puede por ejemplo ser un complejo MDOPE/PE o B OPE/PE.
Por supuesto, un material estirado puede utilizarse para formar la cara (9) externa de la película (7) y un material no estirado diferente puede utilizarse para formar la capa (8) interna de la película (7).
En la práctica, la temperatura de ablandamiento de la cara (9) externa está comprendida entre 120 °C y 140 °C, con preferencia 130 °C y la temperatura de fusión de la cara (8) interna está comprendida entre 80 °C y 100 °C, con preferencia 90 °C. En el caso por ejemplo de una temperatura de ablandamiento de la cara (9) externa de 130 °C y de una temperatura de fusión de la cara (8) interna con preferencia de 90 °C, la temperatura de soldadura difusa puede ser de 115 °C.
Con referencia a las figuras 4 y 5, la invención presenta por tanto una aplicación ventajosa cuando las líneas de soldadura permiten fijar los fuelles (4) a las paredes delantera (2) y trasera (3).
De hecho, en esta configuración, y durante la formación de la bolsa (1), los fuelles (4) se repliegan longitudinalmente sobre sí mismos y se insertan entre las paredes delantera (2) y trasera (3), las líneas de soldadura para fijar los fuelles (4) a las paredes delantera (2) y trasera (3) se realizan por tanto a lo largo de los bordes longitudinales de los fuelles (4), cuyos bordes descansan uno sobre el otro, por un dispositivo (10) de estampado en caliente que actúa únicamente sobre las paredes delantera (2) y/o trasera (3), véase la figura 4.
La soldadura hace por tanto fundir la cara (8) interna de la película(7) parafijar los fuelles (4) y no degrada la cara (9) externa. Lo mismo se aplica a cualquier otro tipo de soldadura, por ejemplo aquellas que permiten rigidizar los bordes longitudinales de los fuelles (4).
Con referencia a la figura 5, y con el fin de garantizar de una manera óptima la integridad de la cara (9) externa de la película (7), la invención prevé, cuando se trata de fijar o rigidizar los fuelles (4), poder disponer posiblemente entre los bordes longitudinales de los fuelles (4) replegados, una banda (11) de material con propiedades de aislamiento térmico, por ejemplo una banda (11) de politetrafluoroetileno, para que, durante la operación de soldadura, los bordes longitudinales descansen cada uno sobre, y en particular a ambos lados, de la banda (11), de manera que no estén en contacto y no se suelden entre sí.
La invención permite por tanto tener una bolsa (uno) de embalaje que comprende al menos, una pared (2) delantera y una pared (3) trasera cuyos bordes laterales están posiblemente conectados por fuelles (4), un fondo (5) y una abertura (6) de llenado, fabricada a partir de una película (7) plástica multicapa y de un solo material que presenta una cara (8) interna situada en el interior de la bolsa (1), una cara externa (9) situada en el exterior de la bolsa (1), cuya diferencia entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna está comprendida entre 20 °C y 60 °C y con preferencia igual a 40°.

Claims (9)

REIVINDICACIONES
1. Procedimiento de fabricación de una bolsa (1) de embalaje que comprende al menos, una pared (2) delantera y una pared (3) trasera, posiblemente conectadas por fuelles (4), un fondo (5) y una abertura (6) de llenado, la bolsa (1) está fabricada a partir de al menos una película (7) plástica que presenta una cara (8) interna destinada a estar situada en el interior de la bolsa (1) y una cara (9) externa destinada estar situada en el exterior de la bolsa (1), el procedimiento que implica la realización de al menos una línea de soldadura sobre al menos una de las paredes delantera (2) o trasera (3), la película (7) plástica es multicapa y la diferencia entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna está comprendida entre 20° y 60°, de manera que la línea de soldadura se realiza a una temperatura de soldadura difusa comprendida entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna, por medio de un dispositivo (10) de estampado en caliente aplicado sobre la cara (9) externa haciendo fundir la cara (8) interna sin ablandar ni degradar la cara (9) externa, caracterizado por que la película (7) plástica es de un solo material.
2. Procedimiento según la reivindicación 1, caracterizado por que la densidad de la cara (8) interna es inferior a la densidad de la cara (9) externa.
3. Procedimiento según una de las reivindicaciones anteriores, caracterizado por que la temperatura de ablandamiento de la cara (9) externa está comprendida entre 120 °C y 140 °C, con preferencia 130 °C.
4. Procedimiento según una de las reivindicaciones anteriores, caracterizado por que la temperatura de fusión de la cara (8) interna está comprendida entre 80 °C y 100 °C, con preferencia 90 °C.
5. Procedimiento según una de las reivindicaciones anteriores, caracterizado por que la temperatura de soldadura difusa es de 115 °C.
6. Procedimiento según una de las reivindicaciones anteriores, caracterizado por que la o las líneas de soldadura permiten cerrar el fondo (5) y/o la abertura (6) de la bolsa (1) y/o rigidizar los bordes de los fuelles (4) y/o fijar los fuelles (4) a las paredes delantera (2) y trasera (3).
7. Procedimiento según una de las reivindicaciones anteriores, caracterizado por que, durante la formación de la bolsa (1), los fuelles (4) se repliegan longitudinalmente sobre sí mismos y se insertan entre las paredes delantera (2) y trasera (3), las líneas de soldadura que permiten fijar los fuelles (4) a las paredes delantera (2) y trasera (3) están realizadas a lo largo de los bordes longitudinales de los fuelles (4) que descansan uno sobre el otro, por un dispositivo (10) de estampado en caliente que actúa únicamente sobre las paredes delantera (2) y/o trasera (3).
8. Procedimiento según la reivindicación 7, caracterizado por que una banda (11) de un material con propiedad de aislamiento térmico se dispone entre los bordes longitudinales de los fuelles (4) replegados para que, durante la operación de soldadura, dichos bordes longitudinales descansen cada uno sobre la banda (11).
9. Bolsa (1) de embalaje que comprende al menos, una pared (2) delantera y una pared (3) trasera, posiblemente conectadas por fuelles (4), un fondo (5) y una abertura (6) de llenado, la bolsa (1) es fabricada a partir de al menos una película (7) plástica multicapa que presenta una cara (8) interna situada en el interior de la bolsa (1) y una cara (9) externa situada en el exterior de la bolsa (1) y cuya diferencia entre la temperatura de ablandamiento de la cara (9) externa y la temperatura de fusión de la cara (8) interna está comprendida entre 20 °C y 90 °C, caracterizada porque la película (7) plástica es de un solo material.
ES21158603T 2020-03-10 2021-02-23 Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada Active ES2986197T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2002384A FR3108099B1 (fr) 2020-03-10 2020-03-10 Procédé de fabrication d’un sac à soufflets, et sac à soufflets perfectionné

Publications (1)

Publication Number Publication Date
ES2986197T3 true ES2986197T3 (es) 2024-11-08

Family

ID=72266360

Family Applications (1)

Application Number Title Priority Date Filing Date
ES21158603T Active ES2986197T3 (es) 2020-03-10 2021-02-23 Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada

Country Status (7)

Country Link
EP (1) EP3878637B1 (es)
ES (1) ES2986197T3 (es)
FR (1) FR3108099B1 (es)
HR (1) HRP20240845T1 (es)
HU (1) HUE067098T2 (es)
PL (1) PL3878637T3 (es)
RS (1) RS65634B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI777888B (zh) * 2022-01-10 2022-09-11 舒美興業股份有限公司 可回收複合夾鏈袋及其製備方法
EP4406734A1 (de) * 2023-01-27 2024-07-31 Mondi AG Seitenfaltenverpackungsbeutel und verfahren zur herstellung eines seitenfaltenverpackungsbeutels
JP2025130971A (ja) * 2024-02-28 2025-09-09 株式会社細川洋行 包装袋及びその製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7116382U (de) 1971-08-12 Olsberger E Geblockter, aus Kunststoff Folien ge fertigter Beutel oder Tragetasche fur die Verpackung
US4358466A (en) * 1980-04-11 1982-11-09 The Dow Chemical Company Freezer to microwave oven bag
AU681888B2 (en) 1993-08-06 1997-09-11 Gromark Packaging Pty Ltd Coextruded plastics packaging for bales
KR100192653B1 (ko) 1997-04-24 1999-06-15 신현철 재활용이 가능한 리필팩
ES2347699T3 (es) 2007-09-19 2010-11-03 Nordenia Deutschland Halle Gmbh Bolsa de pliegues laterales.
US20120033901A1 (en) 2010-08-04 2012-02-09 Votaw Brian E Bag comprising machine direction oriented film
EP2987744B1 (de) 2014-08-22 2017-07-05 Mondi AG Verfahren zur herstellung eines seitenfaltenverpackungsbeutels

Also Published As

Publication number Publication date
HRP20240845T1 (hr) 2024-09-27
FR3108099A1 (fr) 2021-09-17
EP3878637B1 (fr) 2024-05-29
PL3878637T3 (pl) 2024-08-19
HUE067098T2 (hu) 2024-09-28
EP3878637A1 (fr) 2021-09-15
RS65634B1 (sr) 2024-07-31
FR3108099B1 (fr) 2022-05-06
EP3878637C0 (fr) 2024-05-29

Similar Documents

Publication Publication Date Title
ES2986197T3 (es) Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada
ES2403048T3 (es) Bolsa que se sostiene en pie y procedimiento de fabricación de la misma
ES2250312T3 (es) Cierre hermetico que puede cerrarse de nuevo, embalaje y procedimiento.
ES2213586T3 (es) Bolsa flexible para alimentos.
ES2639785T3 (es) Procedimiento para la fabricación de una bolsa de envase de pliegues laterales
ES2209907T3 (es) Bolsas flexibles que se pueden adaptar por estiramiento.
ES2773855T3 (es) Miembro de obturación con lengüeta, laminado para cortar con troquel el miembro de obturación con lengüeta a partir del mismo y un método de fabricación del miembro de obturación con lengüeta
ES2356593T3 (es) Bolsa con asa y método de fabricación.
ES2204624T3 (es) Pastilla de jabon envasada.
PT90306B (pt) Tubo para formacao de saco tubular, saco tubular formado a partir desse tubo e processo de producao desse saco
ES2221435T3 (es) Envase de tubo con decoracion holografica.
US20130343676A1 (en) Storage bag with shape-retaining strips at opening and an expandable bottom end
JP6597179B2 (ja) チャック付包装袋
ES2398938T3 (es) Bolsa de pelicula plástica con relieve
KR101500276B1 (ko) 포장팩 제조방법 및 이에 의해 제조되는 포장팩, 단열팩, 보냉팩, 아이스팩, 보온팩, 기체저장팩
US3256527A (en) Expanded plastic envelope
ES2974811T3 (es) Boca de plástico y envase de bolsita
BRPI0610202A2 (pt) saco com dobras laterais com fundo móvel
ES2990094T3 (es) Procedimiento de fabricación de una bolsa con fuelles y bolsa con fuelles perfeccionada
US3319540A (en) Method of forming bag of heat-sealable material and bag formed thereby
BR112012027307B1 (pt) processo para formar uma embalagem reforçada de boca larga com vedações nas bordas
ES2868785T3 (es) Recipiente de cartón desechable y usos del cartón
AU2005332569A1 (en) Protective packaging for an article
IT202000004924A1 (it) Confezione per prodotti alimentari e relativo metodo di confezionamento
JP2007308150A (ja) パウチ容器