WO2022096277A1 - Dispositif de délamination pour la production de bandes adhésives double face - Google Patents

Dispositif de délamination pour la production de bandes adhésives double face Download PDF

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Publication number
WO2022096277A1
WO2022096277A1 PCT/EP2021/079203 EP2021079203W WO2022096277A1 WO 2022096277 A1 WO2022096277 A1 WO 2022096277A1 EP 2021079203 W EP2021079203 W EP 2021079203W WO 2022096277 A1 WO2022096277 A1 WO 2022096277A1
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WO
WIPO (PCT)
Prior art keywords
delaminating
roller
delamination
adhesive
around
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.)
Ceased
Application number
PCT/EP2021/079203
Other languages
German (de)
English (en)
Inventor
Hubertus Keßelheim
Joachim Lenz
Ulrich Thiel
Massimo BERNADELLI
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.)
Lohmann GmbH and Co KG
Original Assignee
Lohmann GmbH and Co KG
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 Lohmann GmbH and Co KG filed Critical Lohmann GmbH and Co KG
Publication of WO2022096277A1 publication Critical patent/WO2022096277A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
    • B32B43/006—Delaminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically

Definitions

  • the present invention is a special delaminating device for the production of double-sided adhesive tapes.
  • Lamination is the joining of several layers of different flat materials such as paper, fabrics or foils using suitable means, i.e. laminating means, to join these materials.
  • laminating agents are, for example, adhesives, waxes or lacquers.
  • Lamination can have different purposes: By bringing two layers together, at least one of the two layers can be protected, supported or refined by applying a decoration, lamination can be permanent or just temporary.
  • adhesive tapes lamination occurs, among other things, when an adhesive surface is covered with a cover, a so-called release liner, which has the function of protecting the adhesive surface after coating on a carrier material during further processing, i.e. ultimately up to the point of application against dirt or undesired premature sticking.
  • Delamination is then understood to mean the redetachment of one layer from the other, in the case of adhesive tapes specifically the redetachment of the release liner from the adhesive surface either immediately before use or during the manufacturing process of the adhesive tape, as is described in more detail in the following invention.
  • a force is required to delaminate one layer of material from a second.
  • different terms are used for this force:
  • adheresive force peelel force
  • separation force can be used synonymously and are defined as the force that is required to separate two layers, i.e. in the present case to separate an adhesive surface from a surface applied and protecting it. When delaminating, this force is usually referred to as the “separation force”.
  • the layers can be separated at two levels: between liner and adhesive and between adhesive and carrier material.
  • the latter possibility is undesirable and in order to prevent it, the separation force between the cover and the adhesive is set to be much lower than that between the adhesive and the backing. In this case delamination is relatively simple and the requirements for a corresponding delamination unit are low.
  • the delaminating process it is important to ensure that the two material layers in question are separated cleanly and completely. This separation process depends on a number of factors: the adhesive or the adhesive strength of the adhesive, the viscosity of the adhesive, the nature of the cover, which is often provided with a siliconized layer for better detachment (i.e. in particular the type of cover material and the amount and type of silicone applied), the delaminating speed and the delaminating angle, i.e. the angle at which one layer is peeled off and separated from the other layer.
  • a delaminating angle is specified, which can be variably adjusted in some cases, but is always on the same side of the web to be separated.
  • clean and complete separation is not always the case, which can lead to increased rejects or even complete failure of the delaminating process.
  • the fact that in known systems delamination can only be done on one side as standard also makes the production process less flexible and therefore also very complex. Decoupling devices in the production of adhesive tapes are known to manufacturers of adhesive tapes from the production processes themselves and corresponding information can also be found in the literature.
  • EP 3 206 873 B1 describes the delaminating or relaminating process in the production of patches for transdermal therapeutic systems, in which it is important to laminate a tension-sensitive film from a first band-shaped carrier to a second band-shaped carrier with such a low stretch to allow the film that the second carrier is not deformed by the film laminated to it.
  • the corresponding delaminating device minimizes the tensile forces required to detach the tension-sensitive film from the first carrier, since the separating forces are concentrated on the detachment or delaminating point due to the deflection of the film.
  • the film delaminating station has at least one sensor that controls the two transport devices as required.
  • DE 102008 038 595 A1 claims a method for producing an adhesive tape with a double-sided adhesive finish, in the course of which two rigid delaminating devices (delaminating rollers) are provided for the two release liners (auxiliary carrier materials) used in the production process.
  • a product delamination direction 1 a release liner delamination direction 1
  • the invention relates to a delaminating device as used in the production of adhesive tapes.
  • This delamination involves the feeding of an adhesive tape to the delaminating device, the actual delaminating process and the separate winding of the two components of the adhesive tape that have been separated as a result of the delaminating.
  • Such laminates can be produced in a wide variety of ways; possible production forms are described in detail, for example, in DE 10 2008 038 595 A1, which has already been mentioned.
  • at least one delaminating process is necessary, which according to the present invention now takes place in a significantly more flexible, more economical and error-free reproducible manner.
  • the process liner can be on both sides of the adhesive tape, it must also be possible to delaminate both sides of the adhesive tape equally well and reliably, i.e. symmetrical delamination must be possible.
  • the delamination must be able to equally reliably and correctly delaminate different types of adhesives with different properties (softer or harder, more tacky or less tacky, more cohesive or less cohesive) from different types of backing materials with different dehesive finishes.
  • the delaminating angle should be individually adjustable to the special features of the components to be delaminated, ie in general it should be as large as possible Delamination angle aimed at to avoid errors such as "chattering” (i.e. delamination with alternating sometimes abruptly varying delamination speeds) or unintentional "lifting” (e.g. punctiform or flat unintentional lifting) of the adhesive tape to be dismantled or its components (liner , carrier, adhesive sheet) to avoid.
  • errors always occur when, for example, the liner and the adhesive surface are not completely separated from one another and thus detached from one another, but are still in close proximity to one another over a certain distance and time.
  • the aim is for the individual webs (adhesive tape, liner, carrier) to run as straight as possible in order to avoid sharp kinks and thus potential sources of error.
  • the arrangement to be delaminated (e.g. in the form of an adhesive- layered process liner or a carrier material remaining in the finished adhesive tape with the adhesive mass coated thereon, which is now covered by a release liner to be delaminated) via a permanently installed and therefore non-changeable suction puller, not shown in FIG - Roller fed to the actual delaminating unit via a lay-on roller (1) on a control frame.
  • the feed to the lay-on roller (1) can take place from two directions (aA, bB), ie the composite and thus also the process liner can be guided around the lay-on roller (1) on one side or the other.
  • This roller (l) is vertically linearly adjustable in order to be able to set the angle of wrap on the calender shaft (2) individually to the respective requirements - this means that the angle of wrap of the web to be delaminated around the calender shaft (2) can be changed, which means that a cooling capacity that may be necessary can be adapted to requirements.
  • This in turn also affects the position of the other components involved in the delaminating process, ie these must be arranged or can be arranged so flexibly that they enable clean and reliable delamination from each of the two directions from which the process liner can flow .
  • the arrangement of the machine components further involved in the delaminating process must therefore be symmetrically assignable (if the components are fixed and therefore no longer movable) or allow for symmetry (if the components are installed in such a way that they can be moved).
  • the arrangement to be delaminated is fed from the lay-on roller (1) to the countershaft (2), which is also permanently installed and therefore cannot be changed in its position; this is a temperature-controlled calender shaft.
  • This countershaft (2) is connected to a delaminating roller, which can be pivoted 180° around the countershaft (2) (3a, 3b) and is adjusted to the individual delaminating requirements of the arrangement to be delaminated and to the delaminating direction at any angle between 0° and can take up 180°.
  • the delaminating roller (3a, 3b) can of course also be permanently installed at any desired position within this 180° radius, or several such delaminating rollers can also be fixed at different positions within this radius be built in.
  • the delaminating roller (3a, 3b) in turn is directly connected to another roller which has the function of supporting the delaminating roller (3a, 3b) (support roller 4a, 4b) and thus stabilizing the delaminating process and making it reliably reproducible .
  • This support roller can also be swiveled by up to 180°, but like the delaminating roller it can also be permanently installed at any position within this 180° radius or several such support rollers can also be installed at different positions within this radius .
  • the support roller can be dispensed with. In this case, a larger delaminating roller must be selected for reasons of stability. However, this significantly limits the variability and the quality of delamination.
  • the function of the satellite roller (5a, 5b), which can be swiveled by up to 180° like the delaminating roller(s) (3a, 3b) and the supporting roller(s) (4a, 4b), is to separate the already delaminated components as far as possible from each other and at the same time to allow a further run to the respective winding station that is as separate as possible, in order to prevent kinks or other possible sources of error before or during winding.
  • These roller(s) (5a, 5b) can also be mounted in the system in a fixed and non-pivoting manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'invention concerne un dispositif de délamination souple destiné à délaminer deux couches de telle sorte que deux forces sont générées, lesquelles, à partir du plan de séparation, sont dirigées dans des directions opposées de telle sorte qu'elles compriment des composites stratifié au niveau du point de délamination formé individuellement pertinent de telle sorte qu'aucun plan de séparation n'est produit à un point non voulu et qu'une délamintion complète et exempte de résidus se produit si on le souhaite.
PCT/EP2021/079203 2020-11-07 2021-10-21 Dispositif de délamination pour la production de bandes adhésives double face Ceased WO2022096277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020006970.3 2020-11-07
DE102020006970.3A DE102020006970B4 (de) 2020-11-07 2020-11-07 Dekaschiervorrichtung zur Herstellung doppelseitiger Klebebänder

Publications (1)

Publication Number Publication Date
WO2022096277A1 true WO2022096277A1 (fr) 2022-05-12

Family

ID=78536151

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/079203 Ceased WO2022096277A1 (fr) 2020-11-07 2021-10-21 Dispositif de délamination pour la production de bandes adhésives double face

Country Status (2)

Country Link
DE (1) DE102020006970B4 (fr)
WO (1) WO2022096277A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5785795A (en) * 1995-03-14 1998-07-28 Polaroid Corporation System and apparatus for delaminating a laminate containing image bearing media
DE102008038595A1 (de) 2008-08-21 2010-02-25 Tesa Se Verfahren zur Herstellung von bandförmigen Laminaten
EP3206873A1 (fr) 2014-10-14 2017-08-23 Bayer Pharma Aktiengesellschaft Dispositif de re-stratification

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6926871B2 (ja) 2017-09-14 2021-08-25 トヨタ自動車株式会社 燃料電池の膜電極接合体の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5785795A (en) * 1995-03-14 1998-07-28 Polaroid Corporation System and apparatus for delaminating a laminate containing image bearing media
DE102008038595A1 (de) 2008-08-21 2010-02-25 Tesa Se Verfahren zur Herstellung von bandförmigen Laminaten
EP3206873A1 (fr) 2014-10-14 2017-08-23 Bayer Pharma Aktiengesellschaft Dispositif de re-stratification

Also Published As

Publication number Publication date
DE102020006970B4 (de) 2022-07-14
DE102020006970A1 (de) 2022-05-12

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