EP1961552A2 - Processus de production de bandes de sécurité - Google Patents

Processus de production de bandes de sécurité Download PDF

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Publication number
EP1961552A2
EP1961552A2 EP08002984A EP08002984A EP1961552A2 EP 1961552 A2 EP1961552 A2 EP 1961552A2 EP 08002984 A EP08002984 A EP 08002984A EP 08002984 A EP08002984 A EP 08002984A EP 1961552 A2 EP1961552 A2 EP 1961552A2
Authority
EP
European Patent Office
Prior art keywords
film
protective film
layer
internal surface
tape
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Withdrawn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
EP08002984A
Other languages
German (de)
English (en)
Other versions
EP1961552A3 (fr
Inventor
Stefano Finocchiaro
Giacomo Soluri
Gianni Francalanci
Agapito Di Tommaso
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.)
Irplast SpA
Original Assignee
Irplast SpA
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 Irplast SpA filed Critical Irplast SpA
Publication of EP1961552A2 publication Critical patent/EP1961552A2/fr
Publication of EP1961552A3 publication Critical patent/EP1961552A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/02—Multiple-step processes for making flat articles ; Making flat articles the articles being labels or tags
    • B31D1/026—Cutting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/02—Multiple-step processes for making flat articles ; Making flat articles the articles being labels or tags
    • B31D1/027—Multiple-step processes for making flat articles ; Making flat articles the articles being labels or tags involving, marking, printing or coding
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels

Definitions

  • the present invention relates to a process for the manufacture of security adhesive tapes for detecting unauthorized opening of packages, for example of envelopes and containers in general, for mailing.
  • the present invention relates also to the security adhesive tapes obtainable by said process.
  • security adhesive tapes are applied on packages to ensure that an envelope or a container is not open before the delivery to the addressee.
  • One type of these tapes is for example made of an adhesive generally coloured layer and of a support which easily breaks when one tries to open the package.
  • Self-adhesive security tapes which have a non removable image on the container upon unauthorized opening, are also known. These tapes are generally self-adhesive and have a removable protective film superimposed to the adhesive layer so that the adhesive layer is protected until its use for closing the containers. With this kind of tape it is possible to produce for example packages having a ready-to-use security closing device. They can be prepared by applying longitudinally the tape on one of the two openings of the packaging and by using for the adhesion to the container one longitudinal portion of the adhesive layer, which has been uncovered by shifting aside and repositioning the protective film on the adhesive layer. The remaining longitudinal portion of the adhesive layer is covered by the protective film until closure of the packaging for shipping. At this time the protective film is completely removed and the security tape adheres also to the other opening of the packaging. These security tapes are applied to packages on a manufacturing line by using a machine which carries out the following operations:
  • An object of the present invention is a process for producing security tapes wound in webs, for the closing of packages, comprising the following layers (see Fig. 1 ):
  • (4) indicates the security tape
  • (5) indicates the internal surface of the security tape which comes into contact with the support film (1) when the tape is wound in a web. Therefore the internal surface of each layer of the security tape is defined, as the surface of the layer facing the inner part of the web.
  • the inner part of the web is in the direction from the support film (1) to tape (5).
  • the optional additional layers which can be inserted between the support film (1) and the adhesive layer (2) are for example plastic-, metal-, paper-films.
  • an additional plastic film can be used to confer a higher stiffness.
  • a paper film or sheet can be used to confer a higher opacity to the security tape, a metal film can be used to confer a visibility to the security tape, for example by using aluminum as metal.
  • one or more additional layers can be used.
  • step a) is carried out:
  • step a1) the optional additional layers as defined above are applied on the ink layer (11).
  • step a1) the optional additional layers can be applied by lamination.
  • step b) the adhesive layer, as said, is generally applied on the internal surface of the last layer applied on the support (1).
  • the security tape comprises the ink layer (11) ( Fig. 2 ) and does not comprise any additional layer
  • the adhesive layer (2) is applied on the internal surface of the ink layer (11).
  • step b) is carried out for example by an application head with a Mayer bar or by roll application groups.
  • application heads are used suitable for these adhesives, for example they are in the form of slits driven by electrovalves.
  • step c) the application of the protective film (3) to the adhesive layer (2) is carried out by lamination and the surface of the protective film (3) coated with antiadhesive material comes into contact with the internal surface of the adhesive material layer.
  • step d) the longitudinal cut of the protective film (3) into two parts (3a) and (3b) is carried out for example by longitudinal die cut of the protective film (3).
  • step c) it is possible to carry out step c) by using a protective film longitudinally cut in two parts already. In this case step d) is not carried out.
  • the support film (1) is made generally of plastic material and can be oriented, for example bioriented, or non oriented, and is made for example of the following polymers: polypropylene and propylene copolymers, polyester, polyethylene and ethylene copolymers, polyamide, polyisoprene, or it can also be formed of laminates or plastic coupled articles in general.
  • propylene copolymers the propylene polymers with ethylene and/or one or more C 4 -C 10 linear or branched alpha olefins are meant.
  • ethylene ranges from 0 to 40% by moles on the total of the comonomers, preferably from 3% to 15% by moles, more preferably from 5% to 10%.
  • the C 4 -C 10 olefins for example butene, hexene and octene, when present, are in amounts not higher than 10% by moles and preferably range from 0.5% to 9% by moles.
  • ethylene copolymers the ethylene polymers with one or more C 3 -C 10 linear or branched alpha olefins are meant.
  • the amounts of the comonomers in the ethylene copolymers range from 0.5% to 10% by weight, preferably from 1% to 7% by weight.
  • the adhesive layer (2) is made of adhesives available on the market and are selected for example from the following: water acrylic adhesives, in the form of aqueous emulsion based on a C 3 -C 20 , preferably C 3 -C 5 ester of (meth)acrylic acid, for example butyl methacrylate; "hot melt” adhesives formed of thermoplastic rubbers and hydrocarbon resins in general; natural rubber dissolved in organic solvents, for example hexane or toluoyl, aqueous emulsions of natural rubber latexes.
  • water acrylic adhesives in the form of aqueous emulsion based on a C 3 -C 20 , preferably C 3 -C 5 ester of (meth)acrylic acid, for example butyl methacrylate
  • hot melt adhesives formed of thermoplastic rubbers and hydrocarbon resins in general
  • natural rubber dissolved in organic solvents for example hexane or toluoyl, aqueous emulsions
  • the adhesive security tapes of the invention preferably contain one ink layer (10) or (11), more preferably both layers (10) and (11) are present.
  • thermosensitive inks of irreversible type indicating the package exposure to particularly high or particularly low temperatures. This points out an attempt of the tape tampering, for example by using heat sources.
  • one or more additional layers formed of plastic-, metal-, paper-films can be inserted, so that, at an unauthorized opening of the sealed package, an indication appears on the security tape and/or is left on the package pointing out the occurred tampering.
  • the wording OPENED VOID FRAUD could appear.
  • the additional layers can comprise images, texts, serial numbers, holograms, both visible and not.
  • the protective film (3) can be an oriented plastic film, for example bioriented, or non oriented, and can be carried out for example with materials selected from the above mentioned ones used for the support film (1).
  • the surface of the protective film (3) which is in contact with the adhesive material layer is coated with an antiadhesive material, that for example can be a silicon-based polymer.
  • the width of each of the two parts or sections (3a) and (3b) of the protective film (3) are equal or different.
  • the security tape according to the present invention can be unexpectedly and surprisingly obtained by using machines normally used in the adhesive tape manufacture. This represents a remarkable advantage from the industrial point of view as it avoids the additional costs for machines specifically devised for the manufacture of the tape.
  • the security tapes of the prior art such as for example that described above, require for their manufacture a machine devised for the specific purpose.
  • a further object of the present invention is represented by security tapes obtainable by the process of the present invention.
  • the security tapes comprise the following layers, see Fig. 1 :
  • the security tape according to the present invention is formed of the following layers:
  • the ink layer (10) it is applied a further ink layer (11), preferably a coloured ink layer so as to completely coat both the portion of the internal surface of the film (1) not coated by the ink (10), and that coated by the ink (10).
  • the applied adhesive layer (2) covers completely the ink layer (11).
  • the ink layer (11) satisfies th following test:
  • the security tape according to the present invention has a total thickness between 10 micron and 300 micron, preferably between 30 micron and 150 micron.
  • the width of the security tape of the present invention is generally between 5 mm and 500 mm, preferably between 10 mm and 100 mm.
  • the length of the security tape wound in web can be, at will, generally higher than 50 m up to, for example, 10,000 m.
  • the longitudinal edges of the security tape show notches which favour tape breaking in case of tampering.
  • the security tape according to the present invention is applied to containers/envelopes by a process comprising the following steps:
  • step II the portion of the tape (3) which has been removed, or first part of the tape (3), is wound again and discarded.
  • the package closure is carried out by removing the remaining part or second part of th protective film (3) so that the portion of the adhesive material layer (2) no longer coated by the second part of the protective film (3) can adhere to the other edge of the container.
  • the security tape according to the present invention can easily be used in private uses by utilizing for example a manual dispenser.
  • the security tape according to the present invention is ready to use since, as said, it requires only the removal of one of the two parts (3a) and (3b) of the protective film.
  • This is a remarkable advantage in comparison with the security tapes of the prior art having protective film on the adhesive layer which, as said, require a lateral shifting of the protective film and therefore they can be used in practice only on industrial manufacturing lines of security packages.
  • a security adhesive tape according to the present invention is used formed of the following parts:
  • the total thickness of the tape is about 90 ⁇ m, the width is of 30 mm.
  • the tape is wound in webs having a length of 1,000 meters.
  • the tape webs have been used for a production cycle of 8 hours on a machine manufacturing security envelopes made of polyethylene.
  • the machine comprises a rewinding system for the part (3b) of the protective film (3) which in the present example is the one removed from the tape in the application to the envelope.
  • the production speed has been of 120 envelopes/minute.
  • a security adhesive tape (24) is formed of the following parts:
  • the total thickness of the tape is of about 90 ⁇ m, the width is of 30 mm.
  • the tape is wound in webs having a length of 1,000 meters.
  • the tape webs have been used for a production cycle of 8 hours on a machine manufacturing security envelopes made of polyethylene.
  • the machine is moreover equipped with a device for separating the protective film (23) from the adhesive layer (22), shifting aside the protective film (23) with respect to one of the edges of the adhesive layer (22), and then coupling again the protective film (23) in the shifted position with the adhesive layer (22).
  • a longitudinal section of the adhesive layer (22) in uncovered to allow the tape application on the envelope.
  • the remaining longitudinal portion of the adhesive layer (22) remains coated with the protective film (23) until the envelope is sealed by the user.
  • the production speed has been of 70 envelopes/minute.
  • the machine On an average every 10 minutes the machine was stopped for about 3 minutes each time, since the lengths of the protective film (23) and of the adhesivized tape on the coloured ink layer (31) at the end of said period of 10 minutes, resulted different and caused jamming. Therefore the machine has to be regulated in order to compensate the difference and to longitudinally realign the protective film (2,3) with the tape formed by the support film (21), the ink layers (30) and (31) and the adhesive layer 22.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Fats And Perfumes (AREA)
EP08002984A 2007-02-23 2008-02-19 Processus de production de bandes de sécurité Withdrawn EP1961552A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20070349 ITMI20070349A1 (it) 2007-02-23 2007-02-23 Processo per produrre nastri di sicurezza

Publications (2)

Publication Number Publication Date
EP1961552A2 true EP1961552A2 (fr) 2008-08-27
EP1961552A3 EP1961552A3 (fr) 2012-03-14

Family

ID=39322686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002984A Withdrawn EP1961552A3 (fr) 2007-02-23 2008-02-19 Processus de production de bandes de sécurité

Country Status (2)

Country Link
EP (1) EP1961552A3 (fr)
IT (1) ITMI20070349A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105778796A (zh) * 2014-12-22 2016-07-20 常熟市良益胶带工业有限公司 带有防伪功能的彩色胶带

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859157A (en) * 1972-02-22 1975-01-07 Morgan Adhesives Co Method of making a scored paper laminate
FR2238982A1 (fr) * 1973-07-26 1975-02-21 Avery Products Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859157A (en) * 1972-02-22 1975-01-07 Morgan Adhesives Co Method of making a scored paper laminate
FR2238982A1 (fr) * 1973-07-26 1975-02-21 Avery Products Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105778796A (zh) * 2014-12-22 2016-07-20 常熟市良益胶带工业有限公司 带有防伪功能的彩色胶带

Also Published As

Publication number Publication date
ITMI20070349A1 (it) 2008-08-24
EP1961552A3 (fr) 2012-03-14

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