EP3889350A1 - Tube pliable à base de papier - Google Patents

Tube pliable à base de papier Download PDF

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Publication number
EP3889350A1
EP3889350A1 EP21156182.4A EP21156182A EP3889350A1 EP 3889350 A1 EP3889350 A1 EP 3889350A1 EP 21156182 A EP21156182 A EP 21156182A EP 3889350 A1 EP3889350 A1 EP 3889350A1
Authority
EP
European Patent Office
Prior art keywords
collapsible tube
paper
based material
layer
iso
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Withdrawn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
EP21156182.4A
Other languages
German (de)
English (en)
Inventor
Åke REUTERHAGE
Christophe Delrive
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.)
Billerudkorsnas AB
Original Assignee
Billerudkorsnas AB
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 Billerudkorsnas AB filed Critical Billerudkorsnas AB
Priority to EP21156182.4A priority Critical patent/EP3889350A1/fr
Publication of EP3889350A1 publication Critical patent/EP3889350A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • 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
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/02—Body construction
    • B65D35/10—Body construction made by uniting or interconnecting two or more components
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper

Definitions

  • the present invention relates to the field of collapsible tubes.
  • a collapsible tube sometimes referred to as a squeeze tube, is a type of package that is used for viscous liquids such as toothpaste (and other types of paste), artist's paint, adhesives, caulk, ointments (e.g. cosmetic ointments) and hair care products.
  • Collapsible tubes are also used for viscous foods.
  • the body of a collapsible tube is normally formed from plastic or metallic sheet material. Paperboard-based materials, which are preferred from an environmental perspective, have also been used for the body of collapsible tubes, however in much smaller volumes.
  • One reason for the limited success of the paperboard-based material in this application is that it often wrinkles and even breaks during use, i.e. when a user repeatedly squeezes the collapsible tube.
  • An objective of the present disclosure is to provide a paper-based collapsible tube that break to a lesser extent than those of the prior art.
  • the present inventors have found that this objective can be met by using a highly stretchable paper-based material, which is surprising considering that the paper-based material is not stretched to any larger degree during use of the collapsible tubes.
  • a collapsible tube comprising a wall composed of a paper-based material having a stretchability according to ISO 1924-3:2005 of at least 6% in the machine direction (MD) and at least 6% in the cross direction (CD).
  • a typical coat weight of the pigment coating layer 204 is 15 g/m 2 .
  • the basis weight of the first 201 and the second 202 paper layer is typically 100 and 150 g/m 2 , respectively.
  • the adhesive 203 may be extruded polyethylene (PE) or a glue selected from polyurethane-based glues, polyacrylates and polyvinyl acetate copolymers.
  • a typical amount of the adhesive 203 is 6-12 g/m 2 .
  • the coat weight of the barrier layer 205 may be about 60 g/m 2 in case of PE/EVOH/PE and about 42 g/m 2 in case of PET/AlOx/PE. In these cases where the outer sublayer of the barrier layer 205 is PE, no additional heat-sealable layer is needed. When a separate heat-sealable layer 206 is needed, it may have a coat weight of 30-40 g/m 2 .
  • a collapsible tube comprising a wall composed of a paper-based material having a stretchability according to ISO 1924-3:2005 of at least 6% in the machine direction (MD) and at least 6% in the cross direction (CD).
  • the wall typically forms a body portion of the collapsible tube.
  • Another portion of the collapsible tube is typically a shoulder portion, which is sealed to the body portion.
  • the shoulder portion typically defines an opening, through which the contents of the collapsible tube can be squeezed out.
  • the collapsible tube typically further comprises a cap that can close the opening.
  • the cap can be hingedly connected to the shoulder portion.
  • the cap can connect to the shoulder portion by thread means.
  • the stretchability according to ISO 1924-3:2005 of a paper-based material having is at least 8% in the MD and at least 8% in the CD. More preferably, it is at least 9% in both MD and CD.
  • the paper of the paper-based material is preferably kraft paper, e.g. softwood kraft paper.
  • FibreForm® marketed by BillerudKorsnäs (Sweden).
  • the grammage of the paper-based material is typically at least 150 g/m2, preferably at least 250 g/m2 and more preferably at least 230 g/m2.
  • a suitable upper limit for this grammage is 500 g/m2.
  • grammage also referred to as basis weight
  • ISO 536:2019 a standard ISO 536:2019.
  • the paper-based material is preferably a laminate comprising at least two paper layers, such as two or three paper layers.
  • the grammage of each paper layer maybe 80-200 g/m2, preferably 100-200 g/m2, more preferably 100-160 g/m2.
  • the paper layers of the laminate may be bonded to each other by conventional technology known to the skilled person, e.g. by gluing or extrusion lamination.
  • the side of the paper-based material that faces the inside of the collapsible tube may comprise a barrier layer.
  • an oxygen barrier sublayer may be sandwiched between sublayers of PE or PP.
  • the coat weight of the barrier layer is for example 20-60 g/m2.
  • the oxygen barrier sublayer include an EVOH layer, a metallised layer, a SiOx layer and an AlOx layer.
  • the barrier layer may also be a water vapour barrier layer.
  • the barrier layer as such may be heat-sealable.
  • a heat sealing layer may be provided on at least part of the barrier layer.
  • the side of the paper-based material that faces the outside of the collapsible tube may comprises a pigment coating layer.
  • Suitable pigment coating layers are known to the skilled person and typically comprises a binder and calcium carbonate and/or clay.
  • the coat weight of the pigment coating layer maybe 10-30 g/m2.
  • the pigment coating layer is normally printed.
  • the paper-based material that faces the outside of the collapsible tube is not covered by a pigment coating layer. Thereby, a more raw/natural look and feel may be obtained. However, the uncoated paper surface may still be printed.
  • the rear end of the collapsible tube is sealed, typically by a fin seal.
  • a seal may be formed by heat sealing.
  • the collapsible tube may be filled, e.g. by any one of the viscous products mentioned above in the background section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tubes (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
EP21156182.4A 2021-02-10 2021-02-10 Tube pliable à base de papier Withdrawn EP3889350A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21156182.4A EP3889350A1 (fr) 2021-02-10 2021-02-10 Tube pliable à base de papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21156182.4A EP3889350A1 (fr) 2021-02-10 2021-02-10 Tube pliable à base de papier

Publications (1)

Publication Number Publication Date
EP3889350A1 true EP3889350A1 (fr) 2021-10-06

Family

ID=74586840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21156182.4A Withdrawn EP3889350A1 (fr) 2021-02-10 2021-02-10 Tube pliable à base de papier

Country Status (1)

Country Link
EP (1) EP3889350A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB117879A (en) * 1917-12-12 1918-08-08 Francis Maliviore Upwood Improvements in or relating to Tubes for Containing Liquids, Pastes and the like.
US2119926A (en) * 1936-02-21 1938-06-07 Firm Lowit & Comp Collapsible tube container
EP3381676A1 (fr) * 2017-03-30 2018-10-03 BillerudKorsnäs AB Stratifié en papier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB117879A (en) * 1917-12-12 1918-08-08 Francis Maliviore Upwood Improvements in or relating to Tubes for Containing Liquids, Pastes and the like.
US2119926A (en) * 1936-02-21 1938-06-07 Firm Lowit & Comp Collapsible tube container
EP3381676A1 (fr) * 2017-03-30 2018-10-03 BillerudKorsnäs AB Stratifié en papier

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