US20080160237A1 - Thin-Walled Plastic Tube with Label - Google Patents

Thin-Walled Plastic Tube with Label Download PDF

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Publication number
US20080160237A1
US20080160237A1 US10/591,123 US59112305A US2008160237A1 US 20080160237 A1 US20080160237 A1 US 20080160237A1 US 59112305 A US59112305 A US 59112305A US 2008160237 A1 US2008160237 A1 US 2008160237A1
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US
United States
Prior art keywords
tube
label
thin
tube body
walled plastic
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.)
Abandoned
Application number
US10/591,123
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English (en)
Inventor
Sven-Ake Jonsson
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.)
TECTUBES SWEDEN AB
Original Assignee
TECTUBES SWEDEN 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
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Application filed by TECTUBES SWEDEN AB filed Critical TECTUBES SWEDEN AB
Assigned to TECTUBES SWEDEN AB reassignment TECTUBES SWEDEN AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JONSSON, SVEN-AKE
Publication of US20080160237A1 publication Critical patent/US20080160237A1/en
Abandoned 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
    • 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
    • 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
    • B65D2203/00—Decoration means, markings, information elements, contents indicators
    • B65D2203/02—Labels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the invention relates to a thin-walled plastic tube having an axial direction and a radial direction, the plastic tube being manufactured by injection moulding and comprising a tube body with a tube shoulder and an emptying opening at a first end and an end closure at a second end, the tube body having a wall thickness of 0.2-1.5 mm.
  • Tubes made of thin, flexible plastic are used for a range of different packaging purposes, such as packaging hygiene articles, cosmetics and foods.
  • the contents of such tubes may consequently be, for example, soft cheese, caviar, hair-styling gel, toothpaste, shampoo, lotion or liquid soap.
  • the tube should have a smart appearance so as to be visually appealing on the shop shelf.
  • For hygiene articles and cosmetics it is moreover important that the tube looks attractive and decorative, for example on a bathroom shelf.
  • the outside of the tube is of such a nature that product information is conveyed in a clear and easily understood way to a purchaser or user of the packaged product.
  • tubes are usually provided with direct printing or a label which can be printed with the desired pattern and text.
  • IML in-mould-labelling
  • IML technique affords many advantages, such as better pliability of the label around edges and irregularities on a container and a greater possibility of achieving full coverage of the container, it is desirable for it to be possible to use IML for thin-walled tubes as well.
  • a thin-walled plastic tube of the kind referred to in the introduction has been produced by means of the present invention.
  • a tube according to the invention with a tube body provided with a label is in this connection characterized mainly in that the plastic tube comprises a label applied simultaneously with the injection moulding, the label comprising a plastic film with a tensile strength in the axial direction of the tube which is at least 100 N/mm 2 , preferably at least 150 N/mm 2 , and most preferably at least 210 N/mm 2 measured according to DIN ISO 527-1/-3, an elongation at break which is at most 70%, preferably at most 50%, and most preferably at most 25% measured according to DIN ISO 527-1/-3, and a thickness of at most 90 ⁇ m and preferably of at most 75 ⁇ m.
  • the plastic tubes are thin and flexible, so that it is easy to squeeze out their contents and to achieve a high degree of emptying of the tube. For this reason, it is important that the label material contributes as little as possible to the thickness of the tube wall. It is consequently desirable that the label material is very thin, which of course further limits the choice of usable materials.
  • a thin-walled plastic tube according to the invention suitably has a label comprising a plastic film with a tensile strength in the radial direction of the tube of at least 50 N/mm 2 , preferably at least 80 N/mm 2 , and most preferably at least 120 N/mm 2 , and an elongation at break of at most 250%, preferably at most 200%, and most preferably at most 110%.
  • the label extends around the entire tube body in the radial direction.
  • the IML technique By using the IML technique and selecting a label material with the appropriate tensile strength and extensibility, it is possible to apply a label so that it completely surrounds the tube in the radial direction without leaving a gap between the label edges or the label edges overlapping one another. It is thus possible to produce a continuous pattern, or an unbroken text which runs radially around the tube body, without a visible join between the label edges.
  • the label may furthermore be suitable for the label to cover the entire tube body in the axial direction, that is to say from the shoulder edge to the end closure. This is because it is desirable for many packaging purposes that the contents of the tube are not visible through the tube wall.
  • the label can then be used to cover the entire tube body, something which has not been possible with the labelling technique previously used for thin-walled plastic tubes.
  • the invention consequently makes it possible to conceal the contents of tubes made of transparent plastic as well.
  • the label materials suitable for subsequent application are moreover not weldable, which means that it is necessary to ensure that they do not extend into the end closure of the tube, which is usually a thermal weld.
  • the label materials are furthermore relatively rigid, which makes it necessary for the label to end a little way below the edge between the tube body and the tube shoulder.
  • a conventional, subsequently applied tube label which extends up too close to the transition between the tube body and the tube shoulder may otherwise bulge from the tube wall or form a creased edge. This phenomenon should of course be avoided as it gives the tube an unattractive appearance.
  • the label extend in the axial direction of the tube all the way into the end closure on the tube body.
  • the label materials used in the IML method are thermoplastic and, like the plastic material of the tube body, fully weldable and do not affect the possibility of achieving a good closure at the end of the tube. This also means that it is possible to achieve full coverage of the tube body with the label even when the end closure of the tube body has a non-linear curved shape or an angular shape. With subsequently applied labels, shape adaptation to a non-linear end closure requires a degree of synchronization which in practice makes such labelling impossible.
  • Non-linear end closures are used for decorative reasons and in order to give the tube a designed appearance, something which may be desirable in the packaging of cosmetics or the like.
  • a non-linear end closure can also advantageously be used for forming a wider welded-together portion in which an opening or hook can be arranged, which serves as hanging means for the tube, on a shop shelf or in a bathroom for example.
  • the label extend in the axial direction of the tube over the edge between the tube body and the tube shoulder.
  • the label is moulded together with the material of the tube wall, and the phenomenon of different shrinkage between the tube wall and the label does not occur. Instead, the label closes tightly around the tube body in a pliable way without a transparent gap arising between the label and the edge between the tube shoulder and the tube body.
  • a suitable material for use in a label according to the invention is a multilayer plastic film comprising at least one layer of oriented polypropylene (OPP).
  • OPP oriented polypropylene
  • Such a plastic film has a considerably greater tensile strength and lower tensile yield limit in the orientation direction than in a direction at right angles to the orientation direction and is applied to the thin-walled tube with the orientation direction coinciding with the axial direction of the tube.
  • the plastic film used in the label suitably has a density of between 0.4 and 1.2 g/cm 3 and preferably between 0.5 and 1.0 g/cm 3 .
  • the tube itself is made from thermoplastic polymer material which is injected into a mould.
  • thermoplastic polymer material which is injected into a mould.
  • the tube shoulder should be rigid enough that the hole will not collapse and thus prevent extraction of material.
  • the closing device should be relatively rigid in order to provide good functioning when the lid is opened and reclosed. In those cases where the tube has a hinge which connects the tube shoulder and the closing device, further specific material properties are required.
  • the material of the hinge must have such properties that it will withstand repeated bending to and fro without breaking.
  • tubes are often manufactured in separate parts which are joined together to form a whole.
  • the tube body is made from a more flexible material, and the closing device from a more rigid material, and the two parts are joined together in a subsequent manufacturing step. It is also possible, however, to manufacture the parts simultaneously, by injecting different plastic types into different parts of a mould, as described in WO 03/099544. With such a procedure, it is possible to produce a plastic tube in one process step with parts having different properties, such as different rigidity and flexibility and different transparency.
  • FIG. 1 shows a tube according to a first embodiment of the invention
  • FIG. 2 shows a tube according to a second embodiment of the invention.
  • the tube 1 shown in FIG. 1 comprises a hollow tube body 2 , a tube shoulder 3 with a dispensing opening 4 for dispensing a product packaged in the tube 1 .
  • the tube 1 also has a lid 5 which is connected in an articulated manner to the tube shoulder 3 via a hinge joint 6 .
  • the dispensing opening 4 is arranged in a raised portion 7 on the tube shoulder 3 .
  • the tube shoulder 3 is located at a first end 8 of the tube body 2 , while the opposite end 9 of the tube body 2 has an end closure 10 .
  • the tube body 2 of the plastic tube 1 consists of an injection-moulded tubular plastic part with a wall thickness of 0.3-1.2 mm.
  • the lid 5 , the hinge joint 6 and the tube shoulder 3 are also formed by injection moulding, at the same time as the tube body 1 , but have a greater material thickness than the tube body.
  • the tube 1 can be made from polyethylene or polypropylene, for example, but, as there are different requirements for different parts of the tube, it is often advantageous to adapt the material of the tube accordingly. Consequently, the tube body 2 suitably consists of polyethylene or polypropylene, while the tube shoulder 3 consists of a fusion of polyethylene and polypropylene, and the lid 5 and the hinge 6 consist of polypropylene.
  • the tube 1 After the tube 1 has been filled with its contents, the tube has been sealed, suitable by a thermal weld 10 .
  • the majority of the outer surface of the tube 1 is covered by a label 11 .
  • the label 11 extends all the way from the edge 13 between the tube shoulder 3 and the tube body 2 at the first end 8 of the tube body to the end closure 10 at the second end 9 of the tube body 2 .
  • the label 11 moreover extends a little way 12 in over the tube shoulder 3 and also continues into the end closure 10 .
  • the label 11 consists of a rectangular piece of material which has such dimensions that, in addition to extending over essentially the entire length of the tube 1 , that is to say in the axial direction a of the tube, it also reaches all the way around the tube in its radial direction r.
  • the label 11 is therefore adapted to the size of the tube so that it meets essentially edge to edge in the radial direction r without leaving a gap between the label edges. This means that it is possible to have text and/or decorative patterns extend continuously around the tube body without any visible join.
  • the label 11 is applied to the tube at the same time as the latter is formed by injection moulding in a mould.
  • the label 11 is retained on the inside of the wall of the mould by vacuum or by electrostatic forces during manufacture of the tube.
  • the molten plastic material which forms the tube transfers heat to the label, which thus melts onto the outside of the tube.
  • suitable label materials are thin, printable plastic films with a tensile strength in the axial direction of the tube which is at least 100 N/mm 2 , preferably at least 150 N/mm 2 , and most preferably at least 210 N/mm 2 measured according to DIN ISO 527-1/-3, an elongation at break which is at most 70%, preferably at most 50%, and most preferably at most 25% measured according to DIN ISO 527-1/-3, and a thickness of at most 90 ⁇ m and preferably of at most 75 ⁇ m.
  • the plastic film used suitably also has a tensile strength in the radial direction which is at least 50 N/mm 2 , preferably at least 80 N/mm 2 , and most preferably at least 120 N/mm 2 , and an elongation at break in the radial direction of at most 250%, preferably at most 200%, and most preferably at most 110%.
  • the label 11 is sufficiently strong in the axial direction that it is not pulled apart during manufacture of the tube.
  • the label material is thin, so that it does not appreciably increase the thickness of the tube wall and in this way reduce the flexibility and squeezability of the tube and so that the heat transfer between the thin wall of the tube body and the label during manufacture of the tube is sufficient to bring about good adhesion between the label and the tube wall.
  • Plastic films constructed from a number of layers and comprising at least one layer of oriented polypropylene have been found to be particularly suitable label materials.
  • the tube 1 shown in FIG. 2 is broadly the same as the tube 1 in FIG. 1 , and corresponding parts have therefore been given the same reference numbers as in FIG. 1 .
  • the tube 1 in FIG. 2 differs in that the tube does not have an attached lid. Instead, the dispensing opening 4 is adapted for closure by means of a screw cap (not shown).
  • the end closure in FIG. 2 is made as a curved weld.
  • the label 11 is applied simultaneously with the moulding of the tube 1 , without synchronization between a curved edge on the tube body 2 and a curved edge on the label 11 being required.
  • the label materials indicated above are fully weldable and consequently allow the label 11 to extend all the way into the weld.
  • the shape shown of the end closure 10 is of course only an example. Any curved shape of the end closure 10 can consequently be used within the scope of the invention. It is also possible to use end closures which are made up of two or more unequal straight welds, for example in the form of a V, a zig-zag shape or the like.
  • the end closure 10 is provided with a hole 15 , which can serve as a hanging device for hanging the tube, on a bathroom hook for example.
  • the label can extend over such a large part of the surface of the tube 1 as in the examples shown in the figures.
  • the label can consequently cover a smaller part of the tube in both the axial and the radial direction.
  • the tube can also be provided with two or more labels which cover different parts of the tube.
  • the design of the dispensing opening 4 and the type of closing device used for it are of course without importance for the invention. Instead of the closing devices shown, it is of course possible to use a push-on cap, for example, or a cap which is inserted into the dispensing opening. There are also various types of safety caps which can be used if so desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tubes (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
US10/591,123 2004-03-03 2005-03-02 Thin-Walled Plastic Tube with Label Abandoned US20080160237A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0400518A SE527799C2 (sv) 2004-03-03 2004-03-03 Tunnväggig plasttub med etikett
SE0400518-7 2004-03-03
PCT/IB2005/000983 WO2005085081A1 (en) 2004-03-03 2005-03-02 Thin-walled plastic tube with label

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/000983 A-371-Of-International WO2005085081A1 (en) 2004-03-03 2005-03-02 Thin-walled plastic tube with label

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/908,049 Division US8273280B2 (en) 2004-03-03 2010-10-20 Method for the production of a thin-walled flexible plastic tube with label

Publications (1)

Publication Number Publication Date
US20080160237A1 true US20080160237A1 (en) 2008-07-03

Family

ID=32067294

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/591,123 Abandoned US20080160237A1 (en) 2004-03-03 2005-03-02 Thin-Walled Plastic Tube with Label
US12/908,049 Expired - Fee Related US8273280B2 (en) 2004-03-03 2010-10-20 Method for the production of a thin-walled flexible plastic tube with label

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/908,049 Expired - Fee Related US8273280B2 (en) 2004-03-03 2010-10-20 Method for the production of a thin-walled flexible plastic tube with label

Country Status (10)

Country Link
US (2) US20080160237A1 (es)
EP (1) EP1725467B2 (es)
AT (1) ATE468277T1 (es)
DE (1) DE602005021324D1 (es)
ES (1) ES2346450T5 (es)
PL (1) PL1725467T5 (es)
PT (1) PT1725467E (es)
SE (1) SE527799C2 (es)
SI (1) SI1725467T2 (es)
WO (1) WO2005085081A1 (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070084556A1 (en) 2005-10-14 2007-04-19 Langseder Neal E Method of applying a label to a squeeze tube
WO2007047314A2 (en) * 2005-10-14 2007-04-26 Tubedec Llc Method of producing a squeeze tube with maximally labeled surface area
DE202008015189U1 (de) * 2008-11-17 2009-01-29 Dentaco Dentalindustrie Und -Marketing Gmbh Pipette
CH701890A2 (de) 2009-09-30 2011-03-31 Beck Automation Ag Labeltransfervorrichtung für ein IML-Verfahren.
RU2466020C1 (ru) * 2011-05-05 2012-11-10 Открытое акционерное общество "Синарский трубный завод" (ОАО "СинТЗ") Способ изготовления предохранительной детали для защиты внутренней и наружной поверхности концов трубы
US8857664B2 (en) * 2011-11-11 2014-10-14 Ampac Holdings Llc Tube with gussets
WO2014104239A1 (ja) * 2012-12-28 2014-07-03 花王株式会社 ラベル付きチューブ容器
US20160325895A1 (en) * 2015-05-05 2016-11-10 Silgan Plastics Llc Dispensing tube assembly with tamper indication
DE102016115401A1 (de) 2016-08-19 2018-02-22 X-Label Gmbh Verfahren zur Herstellung einer mit einem Etikett versehenden Kunststoffquetschtube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242650A (en) * 1991-09-09 1993-09-07 Avery Dennison Corporation In-mold labelling a coextruded, stretched and annealed label
US5850940A (en) * 1996-10-15 1998-12-22 Sloan; Mark A. Hand-holdable, reuseable containers having animal configurations
US5925208A (en) * 1995-09-13 1999-07-20 Northstar Print Group Process for the production of printed in-mold labeled molded containers
US20020139707A1 (en) * 2001-04-02 2002-10-03 Jorgen Hakansson Earplug dispenser
US6588178B1 (en) * 2001-01-26 2003-07-08 Thatcher Tubes Llc Method of forming plastic tubes with oriented labeling

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US4802832A (en) 1987-10-22 1989-02-07 Hoover Universal, Inc. In-mold labeling accessory for a blow molding machine
TW200424B (es) 1991-09-09 1993-02-21 Avery Dennison Corp
JP3275054B2 (ja) † 1991-10-04 2002-04-15 ヤンマー農機株式会社 刈取収穫機
WO1993009925A2 (en) * 1991-11-13 1993-05-27 Dronzek Peter J Jr Plastic films and rolls for in-mold labeling, labels made by printing thereon, and blow molded articles labeled therewith
JP3310343B2 (ja) † 1992-09-03 2002-08-05 大日本印刷株式会社 チューブ容器及びその製造方法
JPH06246777A (ja) † 1993-02-26 1994-09-06 Dainippon Printing Co Ltd 複合容器の製造装置
BR9506839A (pt) * 1994-12-21 1997-10-14 Wella Ag Recipiente de material plástico em forma de garrafa
FR2741043B1 (fr) † 1995-11-09 1997-12-26 Fabre Rene Tube de conditionnement muni d'une etiquette et procede de fabrication
US5968443A (en) † 1996-03-01 1999-10-19 The Clorox Company Process for in-mold labelling
AU3667997A (en) 1996-07-10 1998-02-02 Tredegar Industries, Inc. Compression roll oriented film for use in in-mold label applications
AUPO617497A0 (en) † 1997-04-14 1997-05-08 Jacobs, Ian Orde Michael Injection moulding
EP1108516B1 (en) † 1999-03-01 2004-10-06 Yoshino Kogyosho Co., Ltd. Insert part stuck cylindrical article, its forming method, and its forming device
SE522156C2 (sv) 2002-05-27 2004-01-20 Norden Tubes Ab Tub, förfarande och verktyg för dess tillverkning

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242650A (en) * 1991-09-09 1993-09-07 Avery Dennison Corporation In-mold labelling a coextruded, stretched and annealed label
US5925208A (en) * 1995-09-13 1999-07-20 Northstar Print Group Process for the production of printed in-mold labeled molded containers
US5850940A (en) * 1996-10-15 1998-12-22 Sloan; Mark A. Hand-holdable, reuseable containers having animal configurations
US6588178B1 (en) * 2001-01-26 2003-07-08 Thatcher Tubes Llc Method of forming plastic tubes with oriented labeling
US20020139707A1 (en) * 2001-04-02 2002-10-03 Jorgen Hakansson Earplug dispenser

Also Published As

Publication number Publication date
ES2346450T3 (es) 2010-10-15
DE602005021324D1 (de) 2010-07-01
SE527799C2 (sv) 2006-06-07
SE0400518D0 (sv) 2004-03-03
ATE468277T1 (de) 2010-06-15
US20110031646A1 (en) 2011-02-10
EP1725467B1 (en) 2010-05-19
PL1725467T3 (pl) 2010-10-29
EP1725467A1 (en) 2006-11-29
SI1725467T2 (sl) 2013-11-29
US8273280B2 (en) 2012-09-25
PT1725467E (pt) 2010-08-17
SI1725467T1 (sl) 2010-09-30
ES2346450T5 (es) 2013-11-18
EP1725467B2 (en) 2013-07-03
WO2005085081A1 (en) 2005-09-15
WO2005085081A8 (en) 2005-12-15
PL1725467T5 (pl) 2013-11-29
SE0400518L (sv) 2005-09-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TECTUBES SWEDEN AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JONSSON, SVEN-AKE;REEL/FRAME:018458/0865

Effective date: 20061006

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION