EP4570692A1 - Sac à porter en plastique - Google Patents

Sac à porter en plastique Download PDF

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Publication number
EP4570692A1
EP4570692A1 EP23216788.2A EP23216788A EP4570692A1 EP 4570692 A1 EP4570692 A1 EP 4570692A1 EP 23216788 A EP23216788 A EP 23216788A EP 4570692 A1 EP4570692 A1 EP 4570692A1
Authority
EP
European Patent Office
Prior art keywords
wall
region
weld
layer
edge
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.)
Pending
Application number
EP23216788.2A
Other languages
German (de)
English (en)
Inventor
Georg Donner
Patrick Eberhard
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.)
Papier Mettler KG
Original Assignee
Papier Mettler KG
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 Papier Mettler KG filed Critical Papier Mettler KG
Priority to EP23216788.2A priority Critical patent/EP4570692A1/fr
Priority to AU2024278300A priority patent/AU2024278300A1/en
Priority to CL2024003842A priority patent/CL2024003842A1/es
Priority to US18/980,115 priority patent/US20250197078A1/en
Publication of EP4570692A1 publication Critical patent/EP4570692A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • 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
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/06—Handles
    • B65D33/10—Handles formed of similar material to that used for the bag
    • B65D33/105—U-shaped

Definitions

  • the present invention relates to a reusable and recyclable plastic carrier bag.
  • Plastic carrier bags are often particularly advantageous from an ecological and economic perspective compared to paper carrier bags if they are frequently reusable and easily recycled. Reusable plastic carrier bags must meet special stability criteria, especially since they are often larger and have carrying loops on the front and back. Conventional loop bags are found, for example, in the DE 101 16 920 A1 , the WO 01/51372 A1 and the DE 40 12 897 A1 These state-of-the-art loop bags often lack sufficient mechanical stability for the repeated carrying of heavy loads.
  • the present invention was therefore based on the object of providing plastic carrier bags, in particular large-sized reusable plastic carrier bags, which do not have the disadvantages of the prior art carrier bags and which are particularly suitable for the repeated reliable transport of even heavy Suitable for heavy loads and which can also be manufactured simply and cost-effectively in machine-based series production.
  • the invention was also based on the object of making reusable plastic carrier bags available that can be filled with both hands, even when empty, without any additional assistance or separate devices.
  • a plastic carrier bag was found with a bottom end and an opposite opening end, comprising a front wall and a rear wall, each with a first side edge and an opposite second side edge and an opening edge, as well as a first and an opposite second side wall, each with a first and an opposite second side edge and an opening edge, wherein the first and the second side wall are designed as single- or multi-layered, in particular single-layered, and at least one holding loop connected to the front wall and/or, in particular and, at least one holding loop connected to the rear wall, each with a first and a second connection area, wherein the front and the rear wall are designed as single- or multi-layered, preferably double-layered, wherein the front and the rear wall are designed as continuous, in particular in one piece, and merge into one another at the bottom end by folding over, in particular forming a bottom fold in this transition, wherein the first side wall is connected to the front wall in the region of its first side edge, in particular along its first side edge, and in the region of the second side edge with the
  • a plastic carrier bag with a bottom end and an opposite opening end comprising a front wall and a rear wall, each with a first side edge and an opposite second side edge and an opening edge, as well as a first and an opposite second side wall, each with a first and an opposite second side edge and an opening edge, wherein the first and the second side wall are designed as single- or multi-layered, in particular single-layered, and at least one holding loop connected to the front wall and/or, in particular and, at least one holding loop connected to the rear wall, each with a first and a second connection area, wherein the front and the rear wall are designed as single- or multi-layered, preferably double-layered, wherein the front and the rear wall are designed as continuous, in particular in one piece, and merge into one another at the bottom end by folding over, in particular forming a bottom fold in this transition, wherein the first side wall in the region of its first side edge is connected to the front wall, in particular along its first side edge, and in the
  • the descriptions of the plastic carrier bag according to the invention are based on a state in which the front and rear walls lie flat against one another on a level surface.
  • the plastic carrier bags according to the invention can be stacked on top of one another in a flat state.
  • This state can also be referred to as a "stackable storage state.”
  • the bottom fold in the stackable storage state particularly preferably represents an outward-facing bottom fold.
  • plastic carrier bags with a large capacity become accessible using large-scale industrial production technology.
  • this particularly substantially rectangular or square base surface can be obtained even in the empty state by simply reaching into the bag interior and moving the front and rear walls apart.
  • the plastic carrier bag according to the invention is advantageously free-standing with an open opening cross-section, so that it can be filled with both hands.
  • these advantageous properties are also achieved in particular by the fact that the first and second side walls each have a side fold, in particular one facing inwards. These side folds preferably begin at the opening end of the plastic carrier bag.
  • the first weld seam ends at a distance from the transition, in particular the bottom fold, in particular at a distance of no more than 1.0 cm.
  • the second weld seam ends at a distance from the transition, in particular the bottom fold, in particular at a distance of no more than 1.0 cm.
  • the third weld seam ends at a distance from the transition, in particular the bottom fold, in particular at a distance of no more than 1.0 cm.
  • the fourth weld seam ends at a distance from the transition, in particular the bottom fold, in particular at a distance of no more than 1.0 cm.
  • a particularly advantageous embodiment of the plastic carrier bag according to the invention is thus achieved by providing an opening for air passage in the area where the first and second weld seams or the respective extensions of the first and second weld seams converge at the transition, in particular the bottom fold, and/or, in particular, by providing an opening for air passage in the area where the third and fourth weld seams or the respective extensions of the third and fourth weld seams converge at the transition, in particular the bottom fold.
  • This opening effectively prevents the bag base from being difficult to detach from a flat surface, for example a transport box, as used in e-commerce, due to a vacuum effect. without compromising the robustness of the reusable plastic carrier bag.
  • This practical design can also be achieved, in particular, with the preferred embodiment of the plastic carrier bag according to the invention mentioned in the previous section.
  • first and the second weld seam or the respective extension of the first or second weld seam essentially converge, in particular converge, in the region of the transition, in particular the bottom fold, and/or, in particular and, in which the third and the fourth weld seam or the respective extension of the third or fourth weld seam essentially converge, in particular converge, in the region of the transition, in particular the bottom fold.
  • the extension of the respective weld seam necessarily represents the rectilinear extension of the same.
  • first, second, third or fourth weld seam in this embodiment is not rectilinear, for example curved, and this weld seam ends before the junction with the transition, a straight line averaged over the non-retilinear course must be used for the extension of the respective weld seam.
  • the first and second side walls are expediently each based on separate material cuts. These material cuts can be individually adapted to the size and shape of the front and back walls or to the design of the bag body formed by the front and back walls. In particularly expedient embodiments, the first and second side walls each have a square, rectangular, or trapezoidal cut.
  • Very practical embodiments of the plastic carrier bags according to the invention provide in particular that the first weld seam or the extension of the first weld seam opens into the transition at a distance from the weld connecting the first side wall and the front wall, which distance corresponds to a maximum of half the width of the first side wall and in particular to half the width of the first side wall, and/or, in particular, that the second weld seam or the extension of the second weld seam opens into the transition at a distance from the weld connecting the first side wall and the rear wall, which distance corresponds to a maximum of half the width of the first side wall and in particular to half the width of the first side wall.
  • the third weld seam or the extension of the third weld seam opens into the transition at a distance from the weld connecting the second side wall and the front wall which corresponds at most to half the width of the second side wall and in particular to half the width of the second side wall, and/or, in particular and, that the fourth weld seam or the extension of the fourth weld seam opens into the transition at a distance from the weld connecting the second side wall and the rear wall which corresponds at most to half the width of the second side wall and in particular to half the width of the second side wall.
  • the plastic carrier bag according to the invention, it can be provided that when the front and rear walls are in contact with one another up to the transition, in particular the bottom fold (also called “stackable storage state"), the first and the second weld seam run essentially congruently, in particular congruently, and/or, in particular and, that the third and the fourth weld seam run essentially congruently, in particular congruently.
  • the extension from the first to the second side edge of the first side wall and/or, in particular and, the extension from the first to the second side edge of the second side wall is greater than the extension from the first to the second side edge of the front wall and/or, in particular and, the extension from the first to the second side edge of the rear wall.
  • the extension from the first to the second side edge of the first side wall and/or, in particular and, the extension from the first to the second side edge of the second side wall corresponds at most to the extension from the first to the second side edge of the front wall and/or, in particular and, the extension from the first to the second side edge of the rear wall.
  • the extension from the first to the second side edge of the first side wall and/or, in particular and, the extension from the first to the second side edge of the second side wall corresponds to the extension from the first to the second side edge of the front wall and/or, in particular and, the extension from the first to the second side edge of the rear wall.
  • the area enclosed by the first weld seam, the transition, in particular the bottom fold, and the weld of the first side wall and front wall is triangular, semicircular, rectangular or square, in particular triangular.
  • the area enclosed by the second weld seam, the transition, in particular the bottom fold, and the weld between the first side wall and rear wall is triangular, semicircular, rectangular or square, in particular triangular.
  • the area enclosed by the third weld seam, the transition, in particular the bottom fold, and the weld between the second side wall and front wall is triangular, semicircular, rectangular or square, in particular triangular, and/or, in particular, that the area enclosed by the fourth weld seam, the transition, in particular the bottom fold, and the weld between the second side wall and rear wall is triangular, semicircular, rectangular or square, in particular triangular.
  • the front and rear walls have a reinforcement region in the region of the opening end, in particular extending to or encompassing the opening end, comprising at least one single-layer or, in particular, multi-layer, preferably double-layer, plastic film strip fastened to the front wall on the inside or outside, in particular on the inside, and at least one single-layer or, in particular, multi-layer, preferably double-layer, plastic film strip fastened to the rear wall on the inside or outside, in particular on the inside, and each extending from or at a distance from the first side edge in the direction of or to the second side edge.
  • the single-layer or multi-layer plastic film strip of the reinforcement region of the front wall is fastened from or at a distance from the first side edge in the direction of or to the second side edge by means of a first weld located below the opening edge, in particular in the form of a first continuous longitudinal weld.
  • the single-layer or multi-layer plastic film strip of the reinforcement region of the rear wall is fastened from or at a distance from the first side edge in the direction of or up to the second side edge by means of a second weld located below the opening edge, in particular in the form of a second continuous longitudinal weld.
  • plastic carrier bags according to the invention are each located below the opening edges of the front wall and rear wall, in particular below the first and second connection areas of the holding loops of the front wall and/or, in particular and, rear wall.
  • plastic carrier bags according to the invention are also particularly preferred in which the opening edge of the first side wall and the opening edge of the second side wall are each at the level of and preferably below the first and second welds, in particular the first and second continuous longitudinal welds.
  • the front wall and the rear wall are designed in multiple layers, in particular double layers, comprising at least one inner layer, in particular an inner layer, and an outer layer, wherein the at least one inner layer, in particular the inner layer, of the front wall and the at least one inner layer, in particular the inner layer, of the rear wall are designed to be continuous, in particular in one piece, and wherein the outer layers of the front and rear walls are designed to be continuous, in particular in one piece.
  • the plastic carrier bag according to the invention described above is also characterized in a preferred embodiment in that the at least one inner layer, in particular the inner layer, of the front wall and the at least one inner layer, in particular the inner layer, of the rear wall are formed in one piece, that the outer layers of the front and rear walls are formed in one piece and that the front wall and the rear wall merge into one another at the bottom end by means of folding over, in particular forming a bottom fold in this transition.
  • the plastic carrier bags according to the invention possess pronounced mechanical stability and sturdiness even when the first and second side walls are designed as single-layered bags.
  • first and second side walls are designed as multi-layered bags, in particular as double-layered bags. This can further increase stability.
  • single-layered first and second side walls often offer even greater stability and, in particular, increased sturdiness if they have a seam at the opening end.
  • This seam can, for example, comprise a reinforcement area. or represent, which can be obtained in particular with the aid of a continuation section adjoining the side wall.
  • this continuation section can be simply folded over onto the inside or outside, in particular the inside, i.e., forming only one layer.
  • the seam can also be formed by a separate strip of plastic material.
  • the continuation section and the strip of plastic material are preferably joined by welding to the inside or outside of the first and second side walls.
  • a particularly high degree of resilience, even with repeated use, is achieved in that the holding loop connected to the front wall and the holding loop connected to the rear wall is welded in its first and second connection areas to the single-layer or, in particular, multi-layer plastic film strip of the reinforcement area and also to the front wall or the rear wall, in particular to the at least one inner layer, in particular the inner layer, and the outer layer of the front wall or rear wall.
  • plastic carrier bags according to the invention solve the problem underlying the invention particularly reliably, in which the single-layer or in particular multi-layer plastic film strip of the reinforcement area of the front wall is fastened over all its layers to the inner layer from or at a distance from the first side edge in the direction of or up to the second side edge by means of the first weld, in particular in the form of the first continuous longitudinal weld, forming a first connecting area, in particular a first connecting strip, and/or, in particular and, in which the single-layer or in particular multi-layer plastic film strip of the reinforcement area of the rear wall is fastened over all its layers to the inner layer from or at a distance from the first side edge in the direction of or up to the second side edge by means of the second weld, in particular in the form of the second continuous longitudinal weld, forming a second connecting area, in particular a second connecting strip, wherein the first and second connecting areas of the holding loop connected to the front wall and the first and second connecting areas of the holding loop connected to the rear wall are on the inside of
  • the outer layer of the front wall is welded to the outer side of the at least one inner layer, in particular the inner layer, along the extension from or at a distance from the first side edge in the direction of or up to the second side edge, in particular with a continuous longitudinal weld, to form a third connecting region, in particular a third connecting strip;
  • the outer layer of the rear wall is welded to the outer side of the at least one inner layer, in particular the inner layer, along the extension from or at a distance from the first side edge in the direction of or up to the second side edge, in particular with a continuous longitudinal weld, to form a fourth connecting region, in particular a fourth connecting strip; wherein these third and fourth connecting regions, in particular third and fourth connecting strips, are each spaced closer to the lower edge of the reinforcement region than to its upper edge, in particular at or adjacent to the lower edge of the reinforcement region; wherein the first and second connection areas of the holding loops connected to the front wall and/or, in particular, to the rear wall, obtained by welding, are spaced apart from
  • the first and third connecting regions each overlap with the second and fourth connecting regions, in particular forming uniform connecting regions.
  • the continuation section present on the inner layer is preferably designed to be at least double-layered, in particular double-layered, at least in some regions by means of folding over.
  • Particularly suitable plastic carrier bags according to the invention are also characterized in that the opening edge of the first side wall and the opening edge of the second side wall are each located at the level of, and in particular below, the first, second, third, and fourth connecting regions.
  • the bag opening can particularly reliably ensure a very large opening cross-section even when empty, in that the bag sections located above the connecting regions, where the holding loops are also located, can be easily folded outward.
  • Particularly preferred plastic carrier bags according to the invention are also characterized in that the holding loop connected to the front wall and the holding loop connected to the rear wall is welded in its first and second connection areas to the single-layer or multi-layer, in particular multi-layer, plastic film strip of the reinforcement area and also to the at least one inner layer, in particular the inner layer, and the outer layer, and wherein the single-layer or multi-layer, in particular multi-layer, plastic film strip of the reinforcement area of the front wall is fastened to the inner or outer layer from or at a distance from the first side edge in the direction of or up to the second side edge by means of welding, and wherein the single-layer or multi-layer, in particular multi-layer, plastic film strip of the reinforcement area of the rear wall is fastened to the inner or outer layer from or at a distance from the first side edge in the direction of or up to the second side edge by means of welding, wherein the first and second connection areas of the holding loop connected to the front wall and the first and second connection areas of the holding loop connected to the rear wall Holding loop on
  • plastic carrier bag according to the invention provides a particularly pronounced reinforcement, particularly in the upper edge area, which withstands strong mechanical loads and provides a very effective basis for attaching straps. Furthermore, the plastic carrier bag provided with such a reinforced area is convenient and easy to open.
  • the plastic carrier bags according to the invention are preferably made of thermoplastics, with polyolefinic thermoplastics, especially polyethylene, being preferred. In these cases, the connection by welding usually represents a thermoplastic weld. Accordingly, the plastic carrier bags according to the invention are particularly preferably made entirely of thermoplastics, especially polyolefinic thermoplastics such as polyethylene. This results in single-variety plastic bags that are particularly sustainably recyclable.
  • the outer layer of the front and back walls of the plastic carrier bag according to the invention usually represents a single layer. If there is another layer on the inside and adjacent to the outer layer, this is to be counted as one of the inside layers or represents the inner layer. If the continuation section is integral with the outer layer, this continuation section must also necessarily be a single layer.
  • the single-layer nature of the outer layer of the front and back walls does not preclude the outer layer from being multi-layered and, for example, from being present as a coextruded film.
  • a single-layer outer layer can also have a laminated layer on the inside and/or outside without losing the character of the single layer. In multi-layer systems, the layers are accordingly closely bonded.
  • outer layer and the inner layer or the majority of the inside layers are accordingly, in a preferred embodiment, connected to one another only by welding along their side edges.
  • outer layer and the inner layer or the majority of the inner layers are partially connected to one another, e.g. via isolated welding or adhesive points, in particular welding points.
  • the holding loop connected to the front wall via its first and second connection areas and the holding loop connected to the rear wall via its first and second connection areas in the area from the respective first to the second connection area at least in sections has a first flexible, in particular tubular, hollow body and/or a single- or multi-layer material strip, in particular plastic material strip, which does not form a hollow body and which is at least in sections, in particular substantially completely, enveloped by a second flexible, in particular tubular, hollow body.
  • the first flexible, in particular tubular, hollow body is formed from a first flexible plastic material strip with opposite first and second longitudinal side edges, the opposite first and second longitudinal side edges of which are welded and/or glued to one another in an overlapping region and/or, preferably and, in which the second flexible, in particular tubular, hollow body is formed from a second flexible plastic material strip with opposite first and second longitudinal side edges, the opposite first and second longitudinal side edges of which are welded and/or glued to one another in a second overlapping region.
  • the first and second flexible plastic material strips for example in the form of polyolefin film strips, in particular polyethylene film strips, can have a rectangular shape when spread out flat.
  • the longitudinal edges of these material strips can then be moved toward each other to form the first and second, in particular tubular, hollow bodies and connected to each other in the overlapping region.
  • the first longitudinal side edge can rest against the second longitudinal side edge both above and below the latter in an overlapping region.
  • a particularly high degree of strength is achieved in particular by the fact that the first plastic material strip of the first flexible, in particular tubular, hollow body and the second plastic material strip of the second flexible, in particular tubular, hollow body are welded and/or glued to one another at least in sections, in particular along the first and second overlapping regions.
  • first and second plastic material strips in the first and/or second overlapping region in a single process step, i.e., essentially simultaneously.
  • This embodiment has the further advantage that the first and second flexible hollow bodies are connected to one another in the region of this uniform weld seam, resulting in further increased mechanical strength.
  • the first and second hollow bodies, in particular a tubular one can also be connected to one another in regions or continuously along their entire length, in particular along a connecting strip, without the first and second overlapping regions themselves overlapping in this connection region.
  • the first flexible, in particular tubular, hollow body is formed from a first flexible plastic material strip with opposite first and second longitudinal side edges and that the second flexible, in particular tubular, hollow body is formed from a second flexible plastic material strip with opposite first and second longitudinal side edges, wherein in the overlapping region of the first and second longitudinal side edges of the first flexible plastic material strip, the first longitudinal side edge of the first plastic material strip is welded and/or glued to the first longitudinal side edge of the second material strip and this first longitudinal side edge of the second plastic material strip is welded to the second longitudinal side edge of the first plastic material strip and wherein in the overlapping region of the first and second longitudinal side edges of the second flexible plastic material strip, the second longitudinal side edge of the first plastic material strip is welded to the second longitudinal side edge of the second material strip and this second longitudinal side edge of the first plastic material strip is welded to the first longitudinal side edge of the second plastic material strip and/or glued.
  • a further advantageous embodiment in particular of the preceding embodiment, provides that in the first and/or second connection area of the first and/or second holding loop, in particular the one that is pressed flat, that side of the holding loop, in particular the one that is pressed flat, is the connection side that does not have the overlapping areas of the opposite first and second longitudinal side edges of the first and second flexible plastic material strips of the first and second flexible hollow bodies. It has surprisingly been shown that particularly good mechanical stability and tear resistance can be achieved in this way.
  • the outer layer of the front and/or rear wall is based on or consists of a plastic material, in particular polyethylene, which is at least partially transparent and which is printable or printed on the inside, at least partially, in particular by means of a counterprinting process.
  • the plastic carrier bag according to the invention alternatively or additionally comprises at least one inner layer, in particular the inner layer, of the front and/or rear wall, which is at least partially printable or printed on the outside, and wherein the outer layer is based on or consists of a plastic material, in particular polyethylene, which is at least partially transparent.
  • a particularly high degree of stability and tear resistance is also achieved by using a non-foamed plastic film, preferably a non-foamed polyolefin film, particularly preferably a non-foamed polyethylene film and in particular a non-foamed LD polyethylene film, for an outer layer of a plastic carrier bag according to the invention in the aforementioned embodiments.
  • a non-foamed plastic film preferably a non-foamed polyolefin film, particularly preferably a non-foamed polyethylene film and in particular a non-foamed LD polyethylene film
  • the combination of a foamed plastic inner layer and a non-foamed plastic outer layer surprisingly leads to particularly mechanically resilient and permanently stable plastic carrier bags.
  • the second flexible, in particular tubular, hollow body, in particular the second flexible plastic material strip is based on or formed from a non-foamed plastic film, preferably a non-foamed polyolefin film, particularly preferably a non-foamed polyethylene film and in particular a non-foamed LD polyethylene film.
  • the outer layer, the single- or multi-layer, in particular double-layer, plastic film strip of the reinforcement area, in particular the continuation section of the inner or outer layer, and the at least one inner layer, in particular the inner layer, of the front and rear walls, the first and the second side walls and optionally the holding loops connected to the front wall and the rear wall, in particular their first and/or second flexible plastic material strips or their single- or multi-layer material strips not forming a hollow body, are formed or consist of polyethylene, in particular LD-polyethylene, wherein the at least one inner layer, in particular the inner layer, of the front and rear walls is a foamed polyethylene film, in particular a foamed LD polyethylene film, and wherein the outer layer of the front and/or rear wall, and optionally the single- or multi-layer, in particular multi-layer, plastic film strip of the reinforcement area, represents a non-foamed polyethylene film, in particular a non-foamed LD
  • plastic carrier bags are particularly preferred in which the first flexible, in particular tubular, hollow body or the single- or multi-layer material strip of the holding loop of the front and/or rear wall that does not form a hollow body, in particular the first flexible plastic material strip, is formed or consists of foamed polymer material, preferably foamed polyethylene, and particularly preferably foamed LD polyethylene, and wherein preferably the second flexible, in particular tubular, hollow body of the holding loop of the front and/or rear wall, in particular the second flexible plastic material strip, is formed or consists of non-foamed polymer material, preferably non-foamed polyethylene, and particularly preferably non-foamed LD polyethylene.
  • the outer layer, the single- or multi-layer, in particular double-layer, plastic film strip of the reinforcement area, in particular the continuation section of the inner or outer layer, and/or the at least one inner layer, in particular the inner layer, of the front and/or rear wall are expediently in film form.
  • a particularly high degree of stability and tear resistance is also achieved in the above-mentioned embodiments of a plastic carrier bag according to the invention in that the first and second connection areas of the holding loops connected to the front wall and/or to the rear wall, which are obtained in particular by welding, are spaced apart from the first and/or second connecting strips, in particular do not have an overlap with the first and/or second connecting strips.
  • polyethylene polypropylene can also be used.
  • Copolymers with ethylene or propylene as the main component come into consideration, whereby for the other comonomers, for example, propylene or ethylene and/or butene, for example 1-butene, or butadiene can be used.
  • the outer layer, the single- or multi-layer, in particular double-layer, plastic film strip of the reinforcement area, in particular the continuation section of the outer layer, and the at least one inner layer, in particular the inner layer, of the front and rear walls as well as the holding loops connected to the front wall and to the rear wall, in particular their first and/or second flexible plastic material strips and/or the single- or multi-layer material strips not forming a hollow body, as well as the first and second side walls are formed or consist of polyolefins, preferably polyethylene, particularly preferably HD or LD polyethylene, in particular LD polyethylene.
  • a uniform plastic material such as polypropylene or polyethylene, preferably polyethylene, and particularly preferably low-density polyethylene, is used for all components of the plastic carrier bag according to the invention, for example, for the inner and outer layers of the front and rear walls, for the holding loops of the front and rear walls, and for the first and second side walls.
  • a uniform plastic material such as polypropylene or polyethylene, preferably polyethylene, and particularly preferably low-density polyethylene
  • the at least one inner layer, in particular the inner layer, of the front and/or, in particular, rear wall comprises or represents a foamed plastic film, preferably a foamed polyolefin film, particularly preferably a foamed polyethylene film and in particular a foamed LD polyethylene film.
  • a foamed plastic film preferably a foamed polyolefin film, particularly preferably a foamed polyethylene film and in particular a foamed LD polyethylene film.
  • the first flexible, in particular tubular, hollow body or the single- or multi-layer material strip not forming a hollow body can also comprise or consist of a foamed plastic film, preferably a foamed polyolefin film, particularly preferably a foamed polyethylene film and in particular a foamed LD polyethylene film.
  • LD polyethylene is particularly preferred among polyethylenes.
  • the holding loop connected to the front wall and/or to the rear wall, in particular on the inside is welded and/or glued in its first and second connection areas, directly or indirectly, to the single-layer or multi-layer, in particular multi-layer, plastic film strip of the reinforcement area, and to the at least one inner layer, in particular the inner layer, and the outer layer, wherein in these first and second connection areas at least the inside of the second hollow body of the holding loop, in particular the inwardly facing side of the second flexible plastic material strip, is welded and/or glued to the outside of the first hollow body or the facing side of the single-layer or multi-layer material strip not forming a hollow body, in particular the outwardly facing side of the first flexible plastic material strip.
  • connection to the at least one inner layer, in particular the inner layer, and the outer layer is usually made indirectly, i.e., via the adjacent adjacent layer.
  • connection to the at least one inner layer, in particular the inner layer, or the outer layer, as well as the layer(s) of the plastic film strip of the reinforcement area is usually made indirectly, i.e., via the adjacent adjacent layer.
  • the molten material of the layers involved may become mixed during welding, making it impossible to clearly assign the material to the layers.
  • first flexible, in particular tubular, hollow body, in particular the first flexible plastic material strip, or the single- or multi-layer material strip not forming a hollow body and/or the second flexible, in particular tubular, hollow body, in particular the second flexible plastic material strip, of the holding loop of the front and/or rear wall to have an embossed pattern at least in sections, in particular over its entire surface.
  • embossed patterns can be reliably and permanently produced, for example, when using thermoplastics, such as polyolefins, through the application of heat and pressure.
  • the plastic carrier bags according to the invention it has proven pragmatic to form the opening edge by a fold at the upper end of the outer layer or in the transition area from the outer layer to the continuation section.
  • the outer layer of the front and/or rear wall is additionally welded and/or glued to the outer side of the at least one inner layer, in particular the inner layer, along the extension from or at a distance from the first side edge in the direction of or up to the second side edge, in particular with a continuous longitudinal weld, to form a second connecting strip, wherein this second connecting strip is preferably spaced closer to the lower edge of the reinforcement region than to its upper edge, in particular at or adjacent to the lower edge of the reinforcement region.
  • the first and second connecting strips are substantially overlapping at least in sections, preferably completely.
  • the plastic carrier bag according to the invention in particular the single-layer plastic carrier bag according to the invention, can be designed in such a way that the outer layer, the single-layer or multi-layer, in particular double-layer, plastic film strip of the reinforcement area, in particular the continuation section of the inner or outer layer, and/or the at least one inner layer, in particular the inner layer, of the front and/or rear wall, the first and the second side wall and the holding loops connected to the front wall and/or the rear wall, in particular their first and/or second flexible plastic material strips or the multi-layer material strip not forming a hollow body, contain or consist of recycled plastic material, in particular recycled polyolefins, for example polyethylene.
  • the invention also includes such plastic carrier bags with a bottom end and an opposite opening end, comprising a front wall and a rear wall, each with a first side edge and an opposite second Side edge and an opening edge, as well as a first and an opposite second side wall, each with a first and an opposite second side edge, wherein the first and the second side wall are designed as single- or multi-layered, in particular single-layered, and at least one holding loop connected to the front wall and/or, in particular and, at least one holding loop connected to the rear wall, each with a first and a second connection region, in which the front and the rear wall are designed as single- or multi-layered, in particular double-layered, comprising at least one inner layer, in particular an inner layer, and an outer layer, wherein the front and the rear wall have a reinforcement region in the region of the opening end, in particular extending to the opening end or encompassing it, containing at least one reinforcement region fastened to the front wall on the inside or outside, in particular inside, and at least one single- or multi-layered, in
  • This embodiment is characterized in that the at least one inner layer, in particular the inner layer, of the front wall and the at least one inner layer, in particular the inner layer, of the rear wall are formed in one piece, that the outer layers of the front and rear walls are formed in one piece and that the front wall and the rear wall merge into one another at the bottom end by turning over, in particular forming a bottom fold in this transition, wherein the first and the second side wall have a square, rectangular or trapezoidal cut, wherein the front wall and the rear wall are welded to the first side wall in the region of their first side edges and wherein the front wall and the rear wall are welded to the second side wall in the region of their second side edges, in particular to form a square or rectangular bottom surface in the erected filled state, wherein preferably the opening edge of the first side wall and the opening edge of the second side wall are each located below the opening edges of the front wall and rear wall, in particular below the first and second connection areas of the holding loops of the front wall and/or, in particular, the rear wall.
  • the plastic carrier bags according to the invention are accompanied by the surprising discovery that they are not only suitable for repeated use, even when carrying heavy loads, but that they are also particularly user-friendly. This applies in particular to those embodiments in which the opening edges of the first and second side walls are each below the opening edges of the front and rear walls. are present. Embodiments have proven particularly suitable in which the opening edges of the first and second side walls are each arranged below the first and second connection areas of the holding loops of the front and rear walls.
  • a particularly high degree of user-friendliness is also achieved by the fact that the opening edge of the first side wall and the opening edge of the second side wall are each arranged below the first and second welds, in particular the first and second continuous longitudinal welds, and in particular also below the first, second, third and fourth connection areas.
  • This is particularly true when the holding loops of the front and rear walls are attached on the inside, preferably in the area of the reinforcement section.
  • the plastic carrier bags according to the invention have proven particularly practical, particularly in the area of e-commerce, where the plastic carrier bags are pre-filled by the supplier upon order and picked up by the end customer.
  • the plastic carrier bags according to the invention can also be temporarily stored in the transport boxes commonly used to protect the contents from mechanical influences. Removing the bags from these transport boxes is particularly unproblematic; sticking can be prevented, for example, by providing cutouts in the base area.
  • Figure 1 shows a schematic front view of a plastic carrier bag (1) according to the invention.
  • the double-layered front wall (6) merges integrally into the double-layered rear wall (8) by folding over, forming a bottom fold (16) in the transition.
  • the inner layers (28, 32) of the front and rear walls (6, 8) are integrally formed, and the outer layers (30, 34) of the front and rear walls (6, 8) are also integrally formed.
  • the first and third weld seams (110, 111) of the front wall and the first and second side walls run at an angle in a straight line towards the bottom fold (16) at the bottom end (2).
  • the second and fourth weld seams (112, 113) of the rear wall with the first and second side walls which also run in the lower third of the plastic carrier bag according to the invention and also run straight at an angle to the bottom fold (16) at the bottom end (2).
  • the front and rear walls (6, 8) are connected to the first and second side walls (102, 104) by means of weld seams (120, 120', 122, 122') running in the region of the first and second side edges (10, 10', 12, 12*) (not shown).
  • the front and rear walls (6, 8) have, in the region of the opening end (4), a reinforcement region (44, 46) extending to the opening end, each containing a double-layered plastic film strip (106, 108) fastened to the inside of the front wall (6) and to the inside of the rear wall (8) respectively, and extending from the first side edge (10) to the second side edge (12).
  • This double-layered plastic film strip (106, 108) can be a separate component, but preferably represents an integral, i.e. one-piece, part of the outer layer and is accordingly formed from a continuation section of the outer layer of the front or rear wall. This continuation section initially forms the opening edge (14, 14') by folding over.
  • this continuation section is welded along a connecting strip (55, 55') to the inner layer (28) and, via this, also to the outer layer (30).
  • the front wall (6) and the rear wall (8) are each connected to the bag body by a holding loop (20, 22) via their first and second connection areas (24A, 24B; 26A, 26B).
  • the first and second connection areas (24A, 24B; 26A, 26B) of the holding loops (20, 22) for the front and rear walls lie completely in the respective reinforcement areas (44, 46) and have no overlap with the connecting strip (55, 55').
  • FIG. 2 a schematic perspective view of the plastic carrier bag (1) according to the invention according to Fig. 1 in the erected, filled state.
  • the bottom surface is formed by parts of the front and rear walls (6, 8) and by triangular regions (124, 126) of the first and second side walls (102, 104).
  • a first weld seam (110) connecting the first side wall and the front wall extends at an angle in a straight line from the weld connecting the first side wall and the front wall in the direction of the transition (16) in the form of the bottom fold.
  • a second weld seam connecting the first side wall and the rear wall also extends at an angle in a straight line from the weld connecting the first side wall and the rear wall in the direction of the bottom fold (16) (not shown).
  • the first and second weld seams run congruently.
  • a third weld seam (111) connecting the second side wall and the front wall extends at an angle in a straight line from the weld connecting the second side wall and the front wall in the direction of the bottom fold (16).
  • a fourth weld seam connecting the second side wall and the rear wall extends at an angle in a straight line from the weld connecting the second side wall and the rear wall in the direction of the bottom fold (16) (not shown).
  • the third and fourth weld seams are congruent in this embodiment.
  • the opening edge (15) of the first side wall (102) and the opening edge (15') of the second side wall (104) are located, with respect to the opening end (4), both below the opening edges (14, 14') of the front wall (6) and rear wall (8) and below the first and second connection areas (24A, 24B; 26A, 26B) of the holding loops (20, 22) of the front wall (6) and rear wall (8) as well as below the connection areas in the form of connection strips (55, 55').
  • FIG 3 shows the upper area of the plastic carrier bag (1) according to the invention according to Figure 1
  • the extension sections (36, 38) are folded over the inner layers (28, 32) and also folded inwards again, thus forming a double layer.
  • These double-layered extension sections (36, 38) are welded to one another, to the inside of the inner layer (28, 32) to form the connecting regions (52, 52'), and furthermore, the inner layer (28, 32) is also welded to the respective outer layer (30, 34) to form the connecting regions (54, 54').
  • the connecting regions (52, 52') and (54, 54') are each overlapping and form a uniform connecting strip (55, 55'), which can in particular also be obtained in a single welding step.
  • the retaining loops (20, 22) shown in detail are welded on the inside to the folded, double-layered extension sections (36, 38) in the first connection areas (24A, 26A) shown. Furthermore, in these connection areas (24A, 26A), the outer layer (30, 34), the inner layer (28, 32) and the folded-over continuation section (36, 38) are each welded to one another. In this way, a very stable, mechanically strong plastic carrier bag (1) is obtained. Furthermore, the illustrated internal attachment of the holding loops ensures uncomplicated filling of the plastic carrier bags according to the invention. The upper ends or opening edges are prevented from serving as abutting edges when filling with piece goods by means of the carrying loops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Air Bags (AREA)
EP23216788.2A 2023-12-14 2023-12-14 Sac à porter en plastique Pending EP4570692A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP23216788.2A EP4570692A1 (fr) 2023-12-14 2023-12-14 Sac à porter en plastique
AU2024278300A AU2024278300A1 (en) 2023-12-14 2024-12-11 Plastic carrier bag
CL2024003842A CL2024003842A1 (es) 2023-12-14 2024-12-13 Bolsa de transporte de plástico
US18/980,115 US20250197078A1 (en) 2023-12-14 2024-12-13 Plastic carrier bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23216788.2A EP4570692A1 (fr) 2023-12-14 2023-12-14 Sac à porter en plastique

Publications (1)

Publication Number Publication Date
EP4570692A1 true EP4570692A1 (fr) 2025-06-18

Family

ID=89223090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23216788.2A Pending EP4570692A1 (fr) 2023-12-14 2023-12-14 Sac à porter en plastique

Country Status (4)

Country Link
US (1) US20250197078A1 (fr)
EP (1) EP4570692A1 (fr)
AU (1) AU2024278300A1 (fr)
CL (1) CL2024003842A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985355A (en) * 1952-12-03 1961-05-23 Robert E Read Bags and method of making bags
DE2116859A1 (de) * 1971-04-06 1972-10-26 Lehmacher, Hans, 5216 Niederkassel Tragetasche und Verfahren zu seiner Herstellung
DE4012897A1 (de) 1990-02-26 1991-08-29 Windmoeller & Hoelscher Textiltragetasche aus thermoplastischem kunststoff und verfahren zu ihrer herstellung
WO2001051372A1 (fr) 2000-01-12 2001-07-19 Trampe Johan Philip Sac dote d'un bandeau de serrage et d'une poignee de transport
DE10116920A1 (de) 2001-04-05 2002-10-24 Lemo Maschb Gmbh Tragetasche aus Kunststoff und Verfahren zu ihrer Herstellung
WO2004022440A1 (fr) * 2002-09-05 2004-03-18 Smq Group B.V. Sac pliable et combinaison d'un contenant et d'un sac et procede d'utilisation de cette combinaison
US20170008676A1 (en) * 2015-07-06 2017-01-12 Papier-Mettler Kg Carrier bag with loops and displaced rims
EP3308950A1 (fr) * 2015-06-11 2018-04-18 Totani Corporation Machine de fabrication de sac
EP3792192A1 (fr) * 2019-09-16 2021-03-17 Mondi AG Agencement de sacs d'emballage ainsi que procédé de fabrication et de manipulation de l'agencement de sacs d'emballage
US20210120926A1 (en) * 2019-10-29 2021-04-29 New York Packaging Ii Collapsible reusable bag apparatus and methods of manufacture thereof
US20210403203A1 (en) * 2020-06-25 2021-12-30 Mollen Kairia Tamperproof Bag

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985355A (en) * 1952-12-03 1961-05-23 Robert E Read Bags and method of making bags
DE2116859A1 (de) * 1971-04-06 1972-10-26 Lehmacher, Hans, 5216 Niederkassel Tragetasche und Verfahren zu seiner Herstellung
DE4012897A1 (de) 1990-02-26 1991-08-29 Windmoeller & Hoelscher Textiltragetasche aus thermoplastischem kunststoff und verfahren zu ihrer herstellung
WO2001051372A1 (fr) 2000-01-12 2001-07-19 Trampe Johan Philip Sac dote d'un bandeau de serrage et d'une poignee de transport
DE10116920A1 (de) 2001-04-05 2002-10-24 Lemo Maschb Gmbh Tragetasche aus Kunststoff und Verfahren zu ihrer Herstellung
WO2004022440A1 (fr) * 2002-09-05 2004-03-18 Smq Group B.V. Sac pliable et combinaison d'un contenant et d'un sac et procede d'utilisation de cette combinaison
EP3308950A1 (fr) * 2015-06-11 2018-04-18 Totani Corporation Machine de fabrication de sac
US20170008676A1 (en) * 2015-07-06 2017-01-12 Papier-Mettler Kg Carrier bag with loops and displaced rims
EP3792192A1 (fr) * 2019-09-16 2021-03-17 Mondi AG Agencement de sacs d'emballage ainsi que procédé de fabrication et de manipulation de l'agencement de sacs d'emballage
US20210120926A1 (en) * 2019-10-29 2021-04-29 New York Packaging Ii Collapsible reusable bag apparatus and methods of manufacture thereof
US20210403203A1 (en) * 2020-06-25 2021-12-30 Mollen Kairia Tamperproof Bag

Also Published As

Publication number Publication date
US20250197078A1 (en) 2025-06-19
AU2024278300A1 (en) 2025-07-03
CL2024003842A1 (es) 2025-03-28

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