WO2011050380A1 - Procédé de fermeture d'un corps de sac - Google Patents

Procédé de fermeture d'un corps de sac Download PDF

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Publication number
WO2011050380A1
WO2011050380A1 PCT/AT2010/000409 AT2010000409W WO2011050380A1 WO 2011050380 A1 WO2011050380 A1 WO 2011050380A1 AT 2010000409 W AT2010000409 W AT 2010000409W WO 2011050380 A1 WO2011050380 A1 WO 2011050380A1
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WO
WIPO (PCT)
Prior art keywords
fabric
bag body
welds
end portion
layer
Prior art date
Application number
PCT/AT2010/000409
Other languages
German (de)
English (en)
Inventor
Herwig Worff
Ernesto Schobesberger
Original Assignee
Herwig Worff
Ernesto Schobesberger
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 Herwig Worff, Ernesto Schobesberger filed Critical Herwig Worff
Publication of WO2011050380A1 publication Critical patent/WO2011050380A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • 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
    • B29C66/01—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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • 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
    • B29C66/71—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
    • B29C66/729—Textile or other fibrous material made from plastics
    • 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
    • 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
    • B29C66/70—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
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0051—Oriented mono-axially
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • 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
    • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/20—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • the invention relates to a method for closing a bag body made of a fabric of monoaxially stretched polymer, in particular polyolefin or polypropylene tapes, in which at least two fabric layers are connected by means of a extending over the width of the bag body seam, and a bag made of a fabric from monoaxially stretched polymer, in particular polyolefin or polypropylene tapes, which is closed on one or both sides.
  • the invention further relates to a device for closing a bag body made of a web of monoaxially stretched polymer, in particular polyolefin or polypropylene tapes, in particular for carrying out the method according to the invention, with a feed device for feeding the bag body to a closing station.
  • the invention relates to sacks, which consist of a fabric of monoaxially stretched polymer, in particular polyolefin or polypropylene tapes. These tapes are prepared by stretching polymer, in particular polyolefin or polypropylene films usually to 4 to 10-fold, whereby the molecular chains are aligned in the ribbon longitudinal direction and have in this direction about 6 to 10 times the strength of the original film.
  • the ribbon width is usually about 1.5-10 mm, the thickness 20-80 jum.
  • a rough classification of such bags is made by the distinction in pillow and box shape.
  • a pillow form of sacks is usually produced by fabricating the bottoms with a textile seam or a weld.
  • Pillow-shaped bags are made as partially ready-made, open-topped bags or as tubing on one Roll delivered. Part-ready-made open-topped bags are usually closed after filling.
  • Sacks produced from tubing are assembled directly on the filling line, a so-called FFS system (Form, Fill and Seal), through a seam on the bottom and, after filling, are also closed by a seam.
  • FFS system Form, Fill and Seal
  • WO 95/30598 Al an improved method is described in which at least one sack end, in particular a bottom surface, via an intermediate layer of, in particular thermoplastic, plastic, in particular polyolefin, preferably polypropylene material by the action of heat with a cover sheet of tissue from monoaxially stretched polymer, in particular special Polyolefin-, preferably polypropylene tapes, is connected and in which only the outer surface area, in particular less than 30% of the material thickness of the tissue bands, of bottom surface and cover sheet as a result of the heat influence disoriented molecules, wherein in the rest of the material region, the molecular orientation is present is.
  • a disadvantage of this method is the control and limitation of the effect of heat such that actually only the outer surface area is heated accordingly and affected by a disorientation of the molecules. Regions of tissue with disoriented molecules have significantly lower strength compared to regions of molecules oriented by the orientation of the material.
  • the invention now aims to make the bag closure such that the material of the bag is weakened by the closure as little as possible, so that the closed bag does not tear even under high mechanical loads, especially in the region of the seal.
  • a significantly higher throughput rate is to be made possible in comparison to the production of a conventional sewn closure seam.
  • process reliability is to be increased, machine maintenance reduced, production costs minimized, and the optical advantages of the product to be guaranteed.
  • the invention relates in particular to sacks with a pillow shape.
  • the method of the aforementioned type according to the invention is characterized in that the seam is designed as a weld, wherein the welding comprises at least one Ultraschallversch spaungsuze.
  • the ultrasonic welding allows in this case to obtain defined welds in a simple manner, so that the affected by the welding portion of the fabric can be reduced in the weld region.
  • the ultrasonic welding is used to form a large number of spaced-apart the weld is weakened in places, the strength between the individual welds being entirely retained. Since the orientation of the molecular chains is lost only to a small extent by the ultrasound welding, the tissue hardly suffers loss of strength.
  • the weld extends according to the invention across the width of the bag body, so that due to the weld, the relevant side of the bag is substantially completely closed.
  • the welding is also made on the - correspondingly reduced due to the chosen corner - width of the bag body and extends accordingly also on the embossed fabric.
  • An advantage of the procedure according to the invention is that it does not cause needle perforation of the tissue There are weak points.
  • the ultrasonic welding is associated with low cost and is characterized by a high operating speed.
  • Significantly more bags per minute can be sealed with the method according to the invention than with the methods known from the prior art.
  • the welded joint is not subject to aging or embrittlement.
  • a welded seam produced by ultrasonic welding of the type mentioned that a peeling load acting on the weld, in which the interconnected fabric layers are pulled apart in a direction transverse to the fabric surface, leads to a detachment of the welded joint. It should therefore be noted in principle that such a welded joint is only subjected to shear, i. only subjected to a load parallel to the tissue surface.
  • a preferred development of the method according to the invention provides that a flat end section of the bag body having at least one open end is folded over and that the ultrasonic welding step comprises ultrasonically welding the folded end section to the bag body.
  • the folded-over end section is merely connected, in particular welded, to the fabric layer of the bag body facing the folded-over end section.
  • the release layer used here is preferably a metal-containing paint. Due to the metal content, such a separating layer leads to heat dissipation, so that the fabric layer of the bag body facing away from the folded-over end section is subject to less or substantially no heat input.
  • the heat input via the oscillatory body that can be excited to form ultrasonic oscillations preferably takes place on the folded-over end section.
  • a peeling load on the welded connection is always effectively prevented if, as is the case with a preferred development, only a number of directly superimposed layers of fabric are ultrasonically bonded to one another starting from the fabric layer coming to lie on top of the remover one-half of the total number of tissue layers.
  • a bag of the type mentioned is provided, which is inventively designed such that at least one closed side has a folded end portion, which is connected only to the folded end portion facing the fabric layer of the bag body, in particular ultrasonically welded.
  • an apparatus for closing a bag body made of a web of uniaxially stretched polymer, in particular polyolefin or polypropylene is provided, in particular for carrying out the method according to the invention, which comprises a feed device for feeding the bag body to a closing station.
  • the device is developed in such a way that the closing station comprises an ultrasonic welding station.
  • FIG. 1 shows a schematic cross section of a tubular fabric for producing a sack according to the invention
  • FIG. 2 shows the fabric with folded end section
  • FIG. 3 shows the end section in the welded state
  • FIG. 4 shows a view according to the arrow IV of FIG. 3
  • FIG. 5 shows an enlarged view of the region V of FIG. 4.
  • a bag 1 is shown from a tubular fabric in a flat state, the open end 2 is to be closed to produce a bag with pillow shape.
  • two fabric layers 3 and 4 can be seen. If it is a bag with side folding, which is readily possible in the context of the present invention, four layers of fabric are present in the side folding. The invention will be explained below but only with reference to a bag without side folding.
  • the procedure is as follows. First, as shown in Fig. 2, the corresponding end portion 5 is folded over on the bag body, so that in the region of the assignment a total of four tissue were lying on top of each other, namely the layers 3, 4, 6 and 7. Between the fabric layers 3 and 4, a release layer 8 is arranged.
  • the separating layer may be a coating which is applied at least either on the side of the fabric layer 4 facing the fabric layer 3 or on the side of the fabric layer 3 facing the fabric layer 4. The separating layer 8 prevents the subsequent ultrasonic welding that the fabric layers 3 and 4 are permanently connected to each other and the fabric layer 3 is damaged.
  • an ultrasonic welding apparatus comprising an anvil 9 and a sonotrode 10.
  • the fabric layers 3, 4, 6 and 7 are clamped between the anvil 9 and the sonotrode 10 by the anvil 9 and the sonotrode 10 accordingly the arrows 11 are moved to the section to be welded.
  • the sonotrode is set in ultrasonic vibration, whereby a welding is effected at the contact points of the sonotrode 10 on the tissue.
  • the fabric layers 4, 6 and 7 are welded together.
  • the release layer 8 prevents a permanent connection of the fabric layers 3 and 4.
  • Fig. 3 shows the bag end in the closed state. Because the fabric layers 3 and 4 are not connected to one another, the weight of the product does not act in the sense of a peel load on the connections 4 to 6 and 6 to 7, but only in the sense of a shear load. The connections can be very take high shear loads, so that the bag closure is maintained even at high loads.
  • the bag closure in a view according to the arrow IV of FIG. 3, wherein it can be seen that the weld is in the form of a weld extending over the entire width of the bag 1.
  • the ultrasonic seam is not formed as a continuous seam, but includes, as is apparent from the detail view of FIG. 5, a plurality of staggered welds 13.
  • the staggered arrangement of the welds 13 causes the Welding affected bands are not weakened over their entire width by the structural change of the molecules caused by the weld. Due to the grid-like arrangement of the welds 13 a stable connection of the fabric layers is achieved without affecting the strength of the fabric as a whole decisively.
  • the sum of the areas of the welds 13 is less than 50%, preferably less than 25%, in particular less than 15% of the surface of the weld 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne un procédé de fermeture d'un corps de sac constitué d'un tissu formé de bandelettes en polymère, en particulier en polyoléfine ou polypropylène, étirées de façon monoaxiale. Au moins deux couches de tissu (3, 4) sont reliées par un joint réalisé sous la forme d'un joint soudé (12), au moins une étape de soudage par ultrasons étant utilisée à cet effet.
PCT/AT2010/000409 2009-11-02 2010-10-29 Procédé de fermeture d'un corps de sac WO2011050380A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1733/2009A AT508982B1 (de) 2009-11-02 2009-11-02 Verfahren zum verschliessen eines sackkörpers
ATA1733/2009 2009-11-02

Publications (1)

Publication Number Publication Date
WO2011050380A1 true WO2011050380A1 (fr) 2011-05-05

Family

ID=43245009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2010/000409 WO2011050380A1 (fr) 2009-11-02 2010-10-29 Procédé de fermeture d'un corps de sac

Country Status (3)

Country Link
AT (1) AT508982B1 (fr)
TW (1) TW201134648A (fr)
WO (1) WO2011050380A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2730393A1 (fr) * 2012-11-07 2014-05-14 Borealis AG Scellement de films orientés
DE102013100131A1 (de) * 2013-01-08 2014-07-10 Windmöller & Hölscher Kg Verfahren zum Herstellen von Säcken

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3169377A1 (fr) * 2013-06-05 2014-12-11 Ameriglobe, Llc Procede de production de sacs ou de contenants en tissu a l'aide de coutures thermofondues
JP6782999B1 (ja) * 2019-08-23 2020-11-11 株式会社Ｗ 鮮度保持用袋体の製造方法

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GB990529A (en) * 1961-11-07 1965-04-28 Nat Distillers Chem Corp Sealing process and sealer device
GB1010324A (en) * 1961-01-17 1965-11-17 Internat Ultrasonics Inc Improvements in or relating to methods of welding together layers of plastic material, apparatus for use in such method and the article produced thereby
GB1030789A (en) * 1962-12-14 1966-05-25 Unilever Ltd Improvements relating to the seaming of stretched plastics films
FR1475799A (fr) * 1966-02-14 1967-04-07 Bemis Co Inc Articles en matière plastique, notamment des sacs obtenus à partir de tubes, et leurs procédés de fabrication
US3422596A (en) * 1965-06-07 1969-01-21 Grace W R & Co Heat sealing apparatus
US3496059A (en) * 1969-02-28 1970-02-17 Phillips Petroleum Co Laminated oriented film material and method of producing the same
US3535184A (en) * 1967-07-12 1970-10-20 Avisun Corp Method of bonding overlapping pieces of oriented plastic having low power factor losses
US4373979A (en) * 1980-09-26 1983-02-15 Workman Bag Company Ltd. Sealed bags of plastic materials
US4558463A (en) * 1984-07-31 1985-12-10 Mobil Oil Corporation Hem seal for draw tape trash bag
WO1995030598A1 (fr) 1994-05-04 1995-11-16 Starlinger & Co. Gesellschaft Mbh Sac en tissu de polymere, notamment de polyolefine, et son procede de fabrication
US6641882B1 (en) * 2000-11-27 2003-11-04 Daiwa Gravure Co., Ltd. Packaging bag
AT9823U1 (de) * 2007-09-10 2008-04-15 Starlinger & Co Gmbh Beschichtetes gewebe aus monoaxial verstreckten kunststoffbändchen und daraus hergestellter sack

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ES1046739U (es) * 2000-07-24 2001-01-16 Daumar Talleres Bolsa con asa para envasado de productos a granel.
DE602008004984D1 (de) * 2008-01-10 2011-03-31 Daumar Talleres Plastiknetztasche

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Publication number Priority date Publication date Assignee Title
GB1010324A (en) * 1961-01-17 1965-11-17 Internat Ultrasonics Inc Improvements in or relating to methods of welding together layers of plastic material, apparatus for use in such method and the article produced thereby
GB990529A (en) * 1961-11-07 1965-04-28 Nat Distillers Chem Corp Sealing process and sealer device
GB1030789A (en) * 1962-12-14 1966-05-25 Unilever Ltd Improvements relating to the seaming of stretched plastics films
US3422596A (en) * 1965-06-07 1969-01-21 Grace W R & Co Heat sealing apparatus
FR1475799A (fr) * 1966-02-14 1967-04-07 Bemis Co Inc Articles en matière plastique, notamment des sacs obtenus à partir de tubes, et leurs procédés de fabrication
US3535184A (en) * 1967-07-12 1970-10-20 Avisun Corp Method of bonding overlapping pieces of oriented plastic having low power factor losses
US3496059A (en) * 1969-02-28 1970-02-17 Phillips Petroleum Co Laminated oriented film material and method of producing the same
US4373979A (en) * 1980-09-26 1983-02-15 Workman Bag Company Ltd. Sealed bags of plastic materials
US4558463A (en) * 1984-07-31 1985-12-10 Mobil Oil Corporation Hem seal for draw tape trash bag
WO1995030598A1 (fr) 1994-05-04 1995-11-16 Starlinger & Co. Gesellschaft Mbh Sac en tissu de polymere, notamment de polyolefine, et son procede de fabrication
US6641882B1 (en) * 2000-11-27 2003-11-04 Daiwa Gravure Co., Ltd. Packaging bag
AT9823U1 (de) * 2007-09-10 2008-04-15 Starlinger & Co Gmbh Beschichtetes gewebe aus monoaxial verstreckten kunststoffbändchen und daraus hergestellter sack

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2730393A1 (fr) * 2012-11-07 2014-05-14 Borealis AG Scellement de films orientés
WO2014072403A1 (fr) * 2012-11-07 2014-05-15 Borealis Ag Films orientés d'étanchéité
US10501223B2 (en) 2012-11-07 2019-12-10 Borealis Ag Sealing oriented films
DE102013100131A1 (de) * 2013-01-08 2014-07-10 Windmöller & Hölscher Kg Verfahren zum Herstellen von Säcken

Also Published As

Publication number Publication date
AT508982A1 (de) 2011-05-15
AT508982B1 (de) 2013-03-15
TW201134648A (en) 2011-10-16

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