EP0459891A1 - Emballage multicouche et matériau d'emballage - Google Patents

Emballage multicouche et matériau d'emballage Download PDF

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Publication number
EP0459891A1
EP0459891A1 EP91401377A EP91401377A EP0459891A1 EP 0459891 A1 EP0459891 A1 EP 0459891A1 EP 91401377 A EP91401377 A EP 91401377A EP 91401377 A EP91401377 A EP 91401377A EP 0459891 A1 EP0459891 A1 EP 0459891A1
Authority
EP
European Patent Office
Prior art keywords
strip
edge
layer
edges
multilayer
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.)
Withdrawn
Application number
EP91401377A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Torterotot
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.)
Jagenberg AG
Original Assignee
Jagenberg AG
Erca Holding SARL
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 Jagenberg AG, Erca Holding SARL filed Critical Jagenberg AG
Publication of EP0459891A1 publication Critical patent/EP0459891A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4279—Joints, seams, leakproof joints or corners, special connections between panels

Definitions

  • the present invention relates to a multilayer closed package, in particular sterile, of generally parallelepipedal shape produced from at least one multilayer strip shaped into a tube with overlapping longitudinal edges and sealed one on the other, in a fluid-tight manner, the multi-layer strip comprising from the inside towards the outside of the packaging, an internal layer of thermo-adhesive thermoplastic material, if necessary a gas and light barrier film and a bonding layer with the next layer, a support layer made of a relatively rigid material such as cardboard and, where appropriate, a thin coating layer of thermo-adhesive thermoplastic material, the end part of the inner layer of the so-called inner edge of the two longitudinal edges of said multilayer strip being folded towards the exterior and rear and being heat-sealed to the inner layer of the other longitudinal edge called exterior.
  • a multilayer closed package in particular sterile, of generally parallelepipedal shape produced from at least one multilayer strip shaped into a tube with overlapping longitudinal edges and sealed one on the other, in a fluid
  • one of the longitudinal edges of the multilayer strip is partially indented from its outer face over approximately half of its thickness, so that it remains part of the thickness of the cardboard support layer, as well as the layers below the indented part of the cardboard, layers which comprise the inner layer of thermo-adhesive thermoplastic material.
  • half of the indented part of the longitudinal edge is folded back on itself towards the outside so that the inner layer is aligned with the outer layer of said edge and can be heat sealed directly on the inner layer of the 'other so-called outer edge of the multilayer strip shaped into a tube.
  • the notch and the folding of the indented part must be carried out with high precision and the outer edge must cover not only the folded part of the indented part, but also an adjacent area of the inner edge.
  • the indented cardboard is exposed to moisture by the liquid product contained in said packaging.
  • the edge or scalloped edge of the cardboard support layer is therefore directly in contact with the liquid so that this cardboard layer swells little by little and this swelling leads to the local destruction of the sealing of the two superimposed edges and thus to the destruction of the sealing of the packaging.
  • the object of the present invention is to eliminate these drawbacks or at least reduce them.
  • the extreme part of the inner layer of thermoplastic material of the so-called inner longitudinal edge and situated inside the packaging is formed by a protective tab which protrudes from said inner edge by a short but sufficient length of the aligned edges and superimposed on other layers or films on the same edge, and is folded outwards so as to tightly cover the edges of said other layers or films including a marginal zone adjacent to the external face of said strip by adhering thereto and that the other said outer edge of the strip is heat-sealed on the outer face of the inner edge, the folded part of the tongue extending the inner thermoplastic layer of the inner edge and heat sealed on the outer face of the latter being interposed between the inner layer thermoplastic of the outer edge and said outer face of said inner edge, said adhesive tab t tightly at each of said edges.
  • the edge of the cardboard layer is directly covered by the protective tab which simultaneously contributes to improving the connection between the inner edge and the outer edge; any harmful space is eliminated in the folding zone of the tongue and the width of the overlapping zone as well as the thickness thereof is reduced to the strict minimum necessary for a tight and long-lasting sealing.
  • the present invention also relates to a packaging material in the form of a multilayer strip comprising a layer of thermo-adhesive thermoplastic material, called the inner layer, and subsequently constituting the inner face of the packaging and a cardboard support layer adhering either directly to the internal layer, either indirectly by means of a barrier layer against fluids and light and an adhesive layer between said support layer and said barrier layer, and, as the case may be if necessary, an outer coating layer of thermo-adhesive thermoplastic material.
  • the packaging material in the form of a multilayer strip of this type has longitudinal edges on which the different layers of the strip are visible (see European patent 0 006 259) or poorly protected (European patent 0 124 772, American patent 4 589 591 ). Therefore, the part of the cardboard layer located in the junction area of the two longitudinal edges, is likely to come, more or less quickly, in contact with the moisture of the liquid which is at the inside the packaging or outside humidity, the swelling of the cardboard caused by this humidity leading to the rupture of the sealing of the packaging.
  • the object of the present invention is to eliminate this drawback.
  • the internal layer of the multilayer strip is extended laterally at least on one side so as to form a protective tab which protrudes from the lateral edges superimposed on all the other layers of the said strip, by a sufficient distance to be able to be folded over said superimposed edges and tightly cover said edges and a marginal zone of the outer face of said strip, zone against which the other edge of the same strip or one of the edges of a second multilayer strip.
  • the closed multilayer packaging which is the subject of the present description has a sterile inner face and is in the general form of a parallelepiped or of a similar shape.
  • This type of packaging is produced from at least one multilayer strip or from two multilayer strips, the edges of which overlap and are sealed to one another in a fluid-tight manner.
  • the methods for manufacturing this type of packaging, filled during its manufacture, are widely known, for example by French patents 1,192,697 and 1,198,792, Swiss patent 621,744 and European patents 0,083,131 and 0,302,413 to name a few, this description will be limited to the essentials of the subject of the invention.
  • the packaging material from which the parallelepipedic packages 1 are made filled with a liquid and / or pasty product with a greater or lesser viscosity during its manufacture and before its final sealing comprises at least one multilayer strip 2 comprising from the inside towards the outside of the packaging 1 an internal layer 3 of thermo-adhesive thermoplastic material such as polyethylene, if necessary a layer or a barrier film 4 which is gas-tight in particular and to light such as aluminum foil or the like and a fusible bonding layer 5 to establish a solid bond with the next layer 6 which is a support layer made of a relatively rigid but pliable material such as cardboard, and , if necessary, a thin coating layer 7 of thermo-adhesive thermoplastic material such as polyethylene.
  • thermo-adhesive thermoplastic material such as polyethylene
  • composition of the multilayer strip 2 is not limited to that which has just been described by way of example, all the more since the subject of the invention does not relate to a multilayer strip of a composition given but a multilayer strip comprising an inner thermoplastic layer 3 and a support layer 6, the number and nature of the other layers of said strip 2 may vary as required (see FIG. 2).
  • the internal layer 3 is extended laterally at least on one side so as to form over the entire length of the multilayer strip 2 a protective tab 8 which protrudes lateral edges (or lateral edges) 9 of all the other superimposed layers 4,5,6,7 of said strip 2 by a distance d sufficient to be able to be folded over said superimposed edges 9 and to cover said edges 9 in leaktight manner and a marginal area 10a of the outer face 10 of said strip 2, area marginal 10a against which will be applied later in a sealed manner and by heat-sealing the other edge 2b of the same strip 2 (FIGS. 3, 4) or one (for example 102a) of the longitudinal edges (102a, 102b) of a second multilayer strip 102 ( Figures 5,6).
  • FIG. 3 one can see the tube 11 which has been formed from a single multilayer strip 2, the greater part of the periphery of this tube 11 being represented schematically by dashed lines.
  • the inner face of the tongue 8 extending the inner layer 3 on one of the sides of the strip 2 beyond the edges 9 of the other layers 4 to 7, is heat sealed in the softened state under the action of a determined pressure P against the internal face of the internal layer 3 of the other edge 2b of the same multilayer strip 2 so that the longitudinal edge of the tongue 8 is aligned with those of the other edge 2b of strip 2 ( Figure 3).
  • the following operation for manufacturing the packaging 1 consists in folding the tongue 8 - edge 2b assembly, over the entire width d of the tongue 8, around the free edges 9 of the first edge 2a of the strip 2 without leaving any interval between said tongue 8 and said edges 9 and heat sealing the tongue 8 over at least part of its width d and preferably over its entire width d, on the adjacent marginal zone 10a of the outer face 10 of said strip 2 (see Figure 4 for example).
  • This establishes a sealed and permanent connection between two edges (for example 2a, 2b) of a strip 2 or two strips 2,102 while protecting in particular the support layer 6 against any infiltration of moisture from the edge thereof. this.
  • the protective tab 8 covers the outer face 10 of the inner edge 2a of the tube 11 and of the package 1 which will result therefrom, on a marginal zone 10a whose width corresponds (to l 'thickness of layers 4 to 7 close) to that of the zone in which the two inner (2a) and outer (2b) edges are heat-sealed one on the other.
  • the tongue 8 is, for its part, heat-sealed on the outer face 10 of the inner edge 2a of the tube 11 or packaging 1 on at least part of the marginal overlap area.
  • the protective tab 8 covers the outer face 10 of the inner edge 2a of the tube 11 over the entire marginal area 10a covered by the outer edge 2b of the tube 11 or of the package 1 and is heat sealed, throughout this marginal area 10a, both on the outer face 10 of the inner edge 2a and on the inner layer 3 of the outer edge 2b of the multilayer strip 2.
  • the term “inner edge” designates that or those of a multilayer strip whose outer face 10, 10a is partially covered by the protective tab 8 and which is (are) inside the packaging 1 or of tube 11, and by "outer edge” that or those of a multilayer strip which does not have (s) a protective tab and is (s) on the outside of packaging 1 or tube 11.
  • the multilayer strip 2 has an internal layer 3 which is extended laterally on both sides so as to form two protective tabs 8 or 108 each of which protrudes from superimposed lateral edges 9 or 109 d '' the same corresponding side of all the other layers 4 to 7 of said strip 2, of a distance d sufficient to be able to be folded over said superimposed edges 9 or 109 and to cover in a sealed manner said edges 9 or 109 and a marginal zone 10a or 110a of the external face 10 of said strip 2.
  • the packaging 1 or tube 11 will be produced using this first multilayer strip 2 and using a second conventional multilayer strip 102, that is to say a strip 102 without tongue of protection, one of which (102a) of the two edges (called outer edges 102a, 102b) will be heat sealed by its internal layer 103 on the tongue 8 and after folding thereof and by means of the latter on the face outer 10 of the first inner edge 2a of the first strip 2 and the other outer edge 102 of which will be heat-sealed in the same way on the tongue 108 and by means of the folded part of the latter on the outer face 10 of the other inner edge 2a ′ of the first multilayer strip 2 (FIG. 6).
  • a second conventional multilayer strip 102 that is to say a strip 102 without tongue of protection, one of which (102a) of the two edges (called outer edges 102a, 102b) will be heat sealed by its internal layer 103 on the tongue 8 and after folding thereof and by means of the latter on the face outer 10 of the first inner edge 2a of
  • the width 2 L of the multilayer strip 2 between the two edges (edges 9 and 109), width counted without protective tabs 8,108 is twice the width L of a strip such than used for making a single strip 1 package.
  • the type of multilayer strip as shown in FIG. 9 can be cut in the vertical plane 13 into two separate strips each having a protective tab as in the example in FIG. 2.
  • This peelable sheet can like the inner layer be made of a thermoplastic material of the polyethylene type ( Figures 7 and 8).
  • FIG. 5 shows a package 1 or tube 11 which is produced from two multilayer strips 2 and 102.
  • the first internal edge 2a of the first strip 2 comprises the tongue 8 folded outwards in the manner previously described and heat sealed on the marginal part 10a of the outer face 10. On this tongue 8 is also heat sealed the inner layer 3 of the outer edge 102b of the second multilayer strip 102, edge 102 devoid of tongue.
  • the inner edge 102a of the second strip 102 is provided with a tongue 108 extending the inner layer 103 and after folding around the edges 109 of the corresponding edge is heat sealed on the outer face 110 of the second strip 102, after having been for example before folding, heat-sealed to the internal layer 3 of the outer edge 2b of the first strip 2.
  • each of the two strips 2,102 comprises, on the side of a first edge intended to constitute an inner edge 2a, 102a of the packaging 1, an inner layer 3.103 extended laterally by a protective tab 8.108 folded outwards so as to seal the edges 9.109 of the other layers 4, 5, 6, 7 of said strip including an adjacent marginal area of the outer face 10,110 of said strip by adhering to it.
  • the second edge 2b, 102b of each strip 2,102 covers the first adjacent edge 102a, 2a of the other strip 102,2 and by its internal layer 103, 3 is heat sealed on the folded part of the tongue 8,108 covering said first edge 2a, 102a of the other band 2.102.
  • the packaging can be made up of two 2.102 multilayer strips, one edge of a first strip of which is heat sealed on one of the edges of the second strip and the second edge of which is heat sealed on the other edge of said second strip .
  • the first strip 2 comprises two lateral edges 2a, 2a ′ each of which is covered by one of the edges 102a, 102b of the second strip 102, and the internal layer 3 of the first strip 2 is extended laterally by each side by a protective tab 8,108 folded outwards so as to seal the edges of the other layers of said first strip 2 including a marginal zone adjacent to the external face 10 of said first strip 2 by adhering to it this.
  • edges 102a, 102b of the second strip 102 covering a corresponding edge of the first strip 2 is heat sealed by its internal layer 103 on the folded part of the corresponding tab 8, 108 of the adjacent edge 2a, 2a ′ of said first strip 2.
  • the peelable protective sheet may consist of the internal layer 103 of a second multilayer strip 102.
  • an intermediate film of silicone wax or similar material 15 is interposed between the layer internal 3 of the first multilayer strip 2 and that 103 of the second multilayer strip 102, the constitution of the intermediate film 15 being such that during the peeling it remains attached to one or the other internal layer 3.103 and moves away from the surface thereof under the effect of a pressure during the heat sealing operation (FIG. 10).
  • the packaging material, the peelable protective sheet can be constituted by the internal layer 103 of a second multilayer strip 102 which adheres directly in a peelable manner to the internal layer 3 of the first multilayer strip 2 , each of these internal layers 3,103 being constituted by a polyolefin, in particular heat-sealable grafted polyethylene.
  • a polyolefin in particular heat-sealable grafted polyethylene.
  • this packaging material is carried out in a known manner by extruding and gluing the thermoplastic layers onto the non-thermoplastic layers (cardboard or aluminum foil, it being understood that the two internal layers are extruded separately and joined after their extrusion when 'They are still sufficiently hot. They can also be extruded separately at slightly different temperatures (for example by a difference of 20 to 30 ° C) and joined immediately after their separate extrusion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Bag Frames (AREA)
EP91401377A 1990-05-30 1991-05-29 Emballage multicouche et matériau d'emballage Withdrawn EP0459891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9006742A FR2662670A1 (fr) 1990-05-30 1990-05-30 Emballage ferme multicouches et materiau d'emballage.
FR9006742 1990-05-30

Publications (1)

Publication Number Publication Date
EP0459891A1 true EP0459891A1 (fr) 1991-12-04

Family

ID=9397108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401377A Withdrawn EP0459891A1 (fr) 1990-05-30 1991-05-29 Emballage multicouche et matériau d'emballage

Country Status (5)

Country Link
EP (1) EP0459891A1 (ja)
JP (1) JPH05124651A (ja)
AU (1) AU7733591A (ja)
CA (1) CA2042999A1 (ja)
FR (1) FR2662670A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113936548A (zh) * 2020-06-29 2022-01-14 云谷（固安）科技有限公司 显示模组、折弯垫块及显示模组的制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363828A (en) * 1966-12-16 1968-01-16 Mobil Oil Corp Heat sealable thermoplastic bag
US4483018A (en) * 1981-02-09 1984-11-13 Impakt Products, Inc. High integrity tamper resistant container
EP0124772A2 (de) * 1983-05-04 1984-11-14 PKL Verpackungssysteme GmbH Kartonbahn bzw. -zuschnitt für eine licht-, luft- und flüssigkeitsdichte, heisssiegelbare Faltschachtel, insbesondere Aseptik-Flüssigkeitsverpackung
US4589591A (en) * 1982-11-24 1986-05-20 Tetra Pak International Ab Joint on packing containers and a method and arrangement for the manufacture of the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363828A (en) * 1966-12-16 1968-01-16 Mobil Oil Corp Heat sealable thermoplastic bag
US4483018A (en) * 1981-02-09 1984-11-13 Impakt Products, Inc. High integrity tamper resistant container
US4589591A (en) * 1982-11-24 1986-05-20 Tetra Pak International Ab Joint on packing containers and a method and arrangement for the manufacture of the same
EP0124772A2 (de) * 1983-05-04 1984-11-14 PKL Verpackungssysteme GmbH Kartonbahn bzw. -zuschnitt für eine licht-, luft- und flüssigkeitsdichte, heisssiegelbare Faltschachtel, insbesondere Aseptik-Flüssigkeitsverpackung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113936548A (zh) * 2020-06-29 2022-01-14 云谷（固安）科技有限公司 显示模组、折弯垫块及显示模组的制作方法
CN113936548B (zh) * 2020-06-29 2024-01-19 云谷（固安）科技有限公司 显示模组、折弯垫块及显示模组的制作方法

Also Published As

Publication number Publication date
JPH05124651A (ja) 1993-05-21
AU7733591A (en) 1991-12-05
CA2042999A1 (en) 1991-12-01
FR2662670A1 (fr) 1991-12-06

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