EP1113060A2 - Ruban adhésif inviolable pour emballage - Google Patents

Ruban adhésif inviolable pour emballage Download PDF

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Publication number
EP1113060A2
EP1113060A2 EP00127140A EP00127140A EP1113060A2 EP 1113060 A2 EP1113060 A2 EP 1113060A2 EP 00127140 A EP00127140 A EP 00127140A EP 00127140 A EP00127140 A EP 00127140A EP 1113060 A2 EP1113060 A2 EP 1113060A2
Authority
EP
European Patent Office
Prior art keywords
adhesive
adhesive tape
film
polypropylene film
tape according
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Withdrawn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
EP00127140A
Other languages
German (de)
English (en)
Other versions
EP1113060A3 (fr
Inventor
Dieter Dr. Wenninger
Stefan Dr. Röber
Wolfgang David
Ralf Schliephacke
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.)
Tesa SE
Original Assignee
Beiersdorf AG
Tesa SE
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 Beiersdorf AG, Tesa SE filed Critical Beiersdorf AG
Publication of EP1113060A2 publication Critical patent/EP1113060A2/fr
Publication of EP1113060A3 publication Critical patent/EP1113060A3/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Withdrawn legal-status Critical Current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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2584—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterized by the slider
    • B65D33/2585—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterized by the slider being provided with tamper-indicating means
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2809—Web or sheet containing structurally defined element or component and having an adhesive outermost layer including irradiated or wave energy treated component
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2843—Web or sheet containing structurally defined element or component and having an adhesive outermost layer including a primer layer

Definitions

  • the invention relates to an adhesive tape with a multilayer composite carrier based on coextruded, stretched polypropylene, one side with adhesive coated, for use in proving the unauthorized opening of a package.
  • security labels are particularly large Importance.
  • US 4,184,701 describes security labels which are made up of several layers of paint or separating layers and thereby have low adhesion of the product layers to one another. In combination with a strongly adhesive adhesive, such layers separate irreversibly from one another, which indicates the opening of the package.
  • the security label has a lower one, which can be removed from a carrier, and on the packaging first adhesive layer to be applied on the underside of a first label material on the top of which a second label material is applied using a second layer of adhesive is applied.
  • the strength of the adhesive strength of the first adhesive layer between the packaging and the first label material is different from the thickness the adhesive strength of the second adhesive layer between the first label material and the second label material.
  • Packaging tapes to prove the unauthorized opening of packaging boxes and other packaging are also known.
  • EP 0 404 402 A2 and US 4,876,123 multilayer cardboard sealing tapes a letter transfer to the packaging surface when trying to open it guarantee and thus represent an opening security.
  • this is one relatively large and at the same time flat bonding surface necessary.
  • security labels are used to secure the opening, use is a suitable release paper is necessary in order to machine security labels to be able to apply. Due to the use of the necessary release paper results in an unfavorably high level of complexity when handling security labels Large quantities of release paper as waste product after the application of the labels and very little flexibility in adapting the safety lock to the respective packaging system or to the respective opening system of the Packaging.
  • a certain type of security label can be set based on the Size and structure of the label applied only to a specific packaging become.
  • shrink films that can also be used as proof of unauthorized opening (Sleeves) show disadvantages in the sometimes lack of individualization and through very high material consumption.
  • Extrusion is the economically most important process in plastics processing.
  • Multi-layer foils based on thermoplastics can be coextruded produce, taking into account the chemical and structural composition of each Layers whose cohesion or interconnection are controlled can.
  • Two- and three-layer films are important in the packaging industry. It is known, for example, that films consisting of non-heat-sealable coextruded, highly crystalline polypropylene layers a weak bond of the film layers with each other. By using polypropylene layers with different Degree of crystallinity or existing through the use of film layers from copolymers such as polypropylene-ethylene, the bond between the film layers can be varied. In this way, the gap strength of the Composite film based on polypropylene and adjusted to the adhesive strength of the adhesive be adjusted.
  • Multi-layer composite films can be produced using flat film extrusion.
  • An overview of the process of flat film extrusion and production of composite films (coextrusion), for example, contains the article "Manufacture of composite films by extrusion coating and extrusion lamination "(J. W. Hoff in "Extruded fine films and composite films", VDI Verlag, Düsseldorf.
  • the type of film used Longitudinal cutting process important for the tensile strength and elongation at break of the product.
  • the cut edge quality resulting from the choice of the longitudinal cutting method used can have a sharp-edged cutting edge and a rough one Generate cutting edge that clearly shows the tensile strength and elongation at break of the slit Foils affected.
  • the object of the present invention is to provide an adhesive tape which is used during removal is destroyed by the surface of the packaging and irreversibly divides itself or tears, which makes it impossible to re-attach to the original state makes, so that evidence of manipulations of a quantitative or qualitative nature on packaged product is recognizable.
  • the invention relates to an adhesive tape with a composite carrier based stretched, coextruded, at least two-layer polypropylene film, one of which Side is provided with an adhesive and the film layers one below the other have low separation force.
  • the total thicknesses are particularly between 15 to 120 microns, preferably between 20 to 50 microns.
  • the thicknesses of the outer film layers are particularly between 2 and 10 ⁇ m, preferably between 3 and 5 ⁇ m.
  • the carrier of the adhesive tapes according to the invention based on biaxially stretched coextruded Polypropylene consists of several layers. Particularly preferred for production
  • the adhesive tapes according to the invention are three-layer films based on biaxially stretched, coextruded polypropylene, which differ in crystallinity or in the composition (polypropylene-ethylene copolymers) distinguishing film layers be combined in such a way that there is little bonding between the layers results.
  • the adhesive tapes according to the invention are biaxially stretched, multilayer, coextruded films based on polypropylene with a stretch ratio in the longitudinal direction between 1: 4 and 1: 9, preferably between 1: 4.8 and 1: 6 and a stretch ratio in the transverse direction between 1: 4 and 1: 9, preferably between 1: 4.8 and 1: 8.5.
  • the elasticity modules achieved in the longitudinal direction measured at 10% elongation according to ASTM D882, are usually between 1000 and 4000 N / mm 2 , preferably between 1500 and 3000 N / mm.
  • the elasticity modules achieved in the transverse direction are also between 1000 and 4000 N / mm 2 , preferably between 1500 and 3000 N / mm 2 .
  • the adhesion of the adhesive on the thermoplastic film based on stretched, coextruded polypropylene improved by corona treatment or flame pretreatment because just that Surfaces of the film based on polyolefins can be known by these Procedures such as corona and flame pretreatment are treated.
  • a The article provides an overview of the methods of surface treatment, for example "Surface pretreatment of plastics for adhesive bonding" (A. Kruse; G. Krüger, A. Baalmann and O.D. Hennemann; J. Adhesion Sci. Technol., Vol 9, No 12, pp 1611-1621 (1995)).
  • the adhesive tape is between the polypropylene film and a layer of a primer is applied to the adhesive layer.
  • the polypropylene film carries on the side opposite the adhesive, a paint, in particular a release coating.
  • Release coatings based on silicone systems are particularly suitable as release coatings of the adhesive tapes according to the invention. are preferred as a release coating UV-curing silicone systems based on 100%, but also solvent-based silicone systems can be used as a release coating for the adhesive tapes of the invention become.
  • the application amount of the release coating on the carrier material is preferably 0.1 to 3 g / sqm.
  • the layer application is the Release paint set from 0.2 to 1.5 g / sqm.
  • the adhesive of the adhesive tape according to the invention can consist of an adhesive based on solvent-containing natural rubber and acrylate adhesives. Adhesives based on acrylate dispersions are preferred, adhesives based on styrene-isoprene-styrene block copolymers are particularly preferred. These adhesive technologies are known and are used in the adhesive tape industry.
  • the amount of adhesive applied to the backing material is preferably 15 to 60 g / sqm. In a further preferred embodiment, the layer application is from 20 to 30 g / qm set.
  • the adhesive tapes can be produced by known processes. An overview of conventional manufacturing processes can be found, for example, in "Coating Equipment”, Donatas Satas in the Handbook of Pressure Sensitive Adhesive Technology, second edition, edited by Donatas Satas, Van Nostrand Reinhold New York pp. 767-808. The known methods for drying and cutting the adhesive tapes can also be found in the Handbook of Pressure Sensitive Adhesive Technology, pages 809-874.
  • the adhesive tapes of the invention can also be printed using conventional methods.
  • the longitudinal cutting process used in the adhesive tapes according to the invention is the squeeze cutting process, which separates the adhesive tape in between in the running direction of the adhesive tape web by means of a rotating circular knife under a pressing force and a counter-pressure cylinder.
  • the rotating circular knife can be designed by different geometries of the cutting edge and by different surface roughness on the cutting flanks so that the cut adhesive tape is influenced in its cutting edge roughness.
  • the cut edge roughness directly influences the tear strength of the cut adhesive tape, ie the rougher the cut edge, the lower the tear strength of the adhesive tape.
  • the reduction in tear strength can be used to apply an adhesive tape after the Not being able to remove the application from the bonded surface without destroying it.
  • edges of the polypropylene film therefore preferably have a serrated cut.
  • inventive concept also includes the use of an inventive one Adhesive tape on packaging to prove unauthorized opening, by making the tape irreversible when removed from the surface of a package is destroyed and clearly indicates an attempted opening by tearing or Splitting in the thickness direction due to the low tear resistance.
  • the adhesive tape according to the invention is for use as a security seal for the clear detection of an unauthorized attempt to open or one Opening suitable for a large number of valuable or sensitive goods.
  • An important field of application is the protection of various consumer goods against Theft, falsification of content and protection against pirated copies.
  • the unnoticed Opening, theft and adulteration of sensitive goods is done by using the invention Avoid tapes.
  • Possible packaging options include folding boxes, bottles and tubes with screw and pressure closures, shampoo bottles, folding boxes, plastic cans and containers.
  • paper, cardboard, glass, polypropylene, polystyrene, polyvinyl chloride and steel are suitable as surfaces for the packaging material.
  • the new adhesive tape should roll off easily and a good bond between Have adhesive and carrier film.
  • foils a and b The following applies to foils a and b: The.
  • the surface energy was> 42mN / m.
  • An adhesive based on an aqueous acrylate dispersion was used for the production the adhesive tapes of the invention and the reference pattern used.
  • the film a and b were coated with the adhesive by means of a wire knife.
  • the wire doctor blade and the coating speed were adjusted so that after the drying of the coated film measured a mass application of about 25 g / sqm becomes.
  • the coating was done on a coater with a working width of 500 mm and a coating speed of 10 m / min.
  • Behind the Coating station with wire-knife applicator was a drying tunnel with hot air (approx. 100 ° C) was operated.
  • the coated film was in a width of Assembled 19 mm as described in d.
  • the determination of the security effect took place after two days of storage at 23 ° C.
  • the film web (film a and b) coated with adhesive was cut longitudinally using rotating squeeze cutting knives, the geometry of which is configured as a zigzag knife.
  • Zigzag knife 0.2 mm Number of teeth: 604
  • FIGS. 1 and 2 show the squeeze cutting knife 1 used.
  • the knife 1 has 604 teeth 2.
  • the adhesive tapes produced in c were examined and compared with a reference pattern.
  • adhesive tapes (5x1 cm) of the adhesive tapes were placed on various adhesive grounds and the reference sample are glued to the surfaces listed in e and by means of pressed on a 2 kg steel roller (roll over twice). After a wait 24 hours at 23 ° C was tried manually to what extent the adhesive strips are non-destructive could be deducted or removed.
  • technical aids such as scissors or knives are also used.
  • Adhesive strips resulting from adhesive tapes according to the invention (film a): Adhesive reason Non-destructive removal from the grounds described in e possible Polyethylene No Polystyrene No Glass No steel No
  • Adhesive strips resulting from reference adhesive tape (film b): Adhesive reason Non-destructive removal from the grounds described in e possible Polyethylene Yes Polystyrene Yes Glass Yes steel Yes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
EP00127140A 1999-12-29 2000-12-12 Ruban adhésif inviolable pour emballage Withdrawn EP1113060A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19963711A DE19963711A1 (de) 1999-12-29 1999-12-29 Klebeband zum Nachweis des unbefugten Öffnens einer Verpackung
DE19963711 1999-12-29

Publications (2)

Publication Number Publication Date
EP1113060A2 true EP1113060A2 (fr) 2001-07-04
EP1113060A3 EP1113060A3 (fr) 2001-10-17

Family

ID=7934950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00127140A Withdrawn EP1113060A3 (fr) 1999-12-29 2000-12-12 Ruban adhésif inviolable pour emballage

Country Status (3)

Country Link
US (1) US20010007712A1 (fr)
EP (1) EP1113060A3 (fr)
DE (1) DE19963711A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1403190A3 (fr) * 2002-09-27 2004-07-07 Tesa AG Sceau de garantie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006004459U1 (de) * 2006-03-11 2007-07-26 Herma Gmbh Etikettenanordnung
DE102012202635A1 (de) * 2012-02-21 2013-08-22 Tesa Se Klebeband mit einem Trägermaterial mit verbesserter Handeinreißbarkeit

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184701A (en) * 1978-02-10 1980-01-22 Monarch Marking Systems, Inc. Tamper proof label
DE3431239A1 (de) * 1984-01-25 1985-07-25 Zweckform Werk Gmbh, 8150 Holzkirchen Sicherheitsetikett zum nachweis des unbefugten oeffnens einer verpackung
DE3422302A1 (de) * 1984-06-15 1985-12-19 Hoechst Ag, 6230 Frankfurt Klebeband
DE3501726A1 (de) * 1985-01-19 1986-07-24 Hoechst Ag, 6230 Frankfurt Polypropylen-klebeband
US4876123A (en) * 1988-06-27 1989-10-24 Minnesota Mining And Manufacturing Company Tamper indicating tape and delaminating film therefore
US4980222A (en) * 1989-06-21 1990-12-25 Minnesota Mining And Manufacturing Company Tamper indicating tape
GB9203931D0 (en) * 1992-02-25 1992-04-08 Nmc Flexible Packaging Limited Tamper indicating packages
US5288548A (en) * 1992-07-31 1994-02-22 Mobil Oil Corporation Label face stock
DE9217226U1 (de) * 1992-12-12 1993-04-15 Bundesrepublik Deutschland, vertreten durch den Bundesminister für Post-und Telekommunikation, dieser vertreten durch den Präsidenten der Bundesdruckerei, 1000 Berlin Haftetikettenrolle
DE4318277C1 (de) * 1993-06-03 1994-09-01 Beiersdorf Ag Verwendung von Zackenschnittmessern
DE19529728C1 (de) * 1995-08-12 1996-10-24 Trautwein Gmbh & Co Klebestempel, Plakette o. dgl. zur Anbringung an Dokumenten, Kraftfahrzeugen o. dgl.
FR2749316B1 (fr) * 1996-06-04 1998-09-11 Decomatic Sa Ruban adhesif de securite
US5876816A (en) * 1996-07-10 1999-03-02 Avery Dennison Corporation Tamper evident labels and methods of producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1403190A3 (fr) * 2002-09-27 2004-07-07 Tesa AG Sceau de garantie

Also Published As

Publication number Publication date
US20010007712A1 (en) 2001-07-12
EP1113060A3 (fr) 2001-10-17
DE19963711A1 (de) 2001-07-05

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