WO1987005315A1 - Article a couche adhesive de revetement et son procede de production - Google Patents

Article a couche adhesive de revetement et son procede de production Download PDF

Info

Publication number
WO1987005315A1
WO1987005315A1 PCT/EP1987/000105 EP8700105W WO8705315A1 WO 1987005315 A1 WO1987005315 A1 WO 1987005315A1 EP 8700105 W EP8700105 W EP 8700105W WO 8705315 A1 WO8705315 A1 WO 8705315A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
layer
mass
substrate
particles
Prior art date
Application number
PCT/EP1987/000105
Other languages
German (de)
English (en)
Inventor
Erich Pagendarm
Original Assignee
Erich Pagendarm
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
Priority claimed from DE3606199A external-priority patent/DE3606199C2/de
Priority claimed from DE19863628784 external-priority patent/DE3628784A1/de
Priority claimed from DE19863632816 external-priority patent/DE3632816A1/de
Application filed by Erich Pagendarm filed Critical Erich Pagendarm
Publication of WO1987005315A1 publication Critical patent/WO1987005315A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous

Definitions

  • the invention relates to an adhesive-coated, removable object, for example a sticky note, the adhesive of which forms a surface with a large number of separate, adhesive surface elements.
  • the invention further relates to a method for producing an adhesive layer on a substrate that can be detached from a counter surface and has a reduced adhesive surface.
  • Large-area adhesives applied to a substrate such as those used for labels, adhesive tapes and the like. Like. Are used, are generally not or only with difficulty detachable from the counter surface, because they connect to the counter surface over a large area, parts of the adhesive can stick to the counter surface when detached or parts of the counter surface can be torn off.
  • Such large-area adhesive layers are therefore not suitable for substrates that should be easily removable, for example for sticky notes that are temporarily connected to documents. It has been found that an adhesive layer can be removed again if it is not continuous over a large area, but is composed of a large number of small, punctiform or linear parts.
  • the layer is formed by a multiplicity of spheres bonded to the substrate in one layer by means of an adhesive layer, each of which adheres individually to the counter surface.
  • the layer is made up of strips.
  • DE-A 33 46 100 proposes to apply dome-shaped particles of the adhesive at intervals to the substrate by screen printing or gravure printing.
  • a perforated cylinder is used to apply the adhesive in a punctiform manner to the substrate.
  • the invention has for its object to reduce the manufacturing costs.
  • the solution according to the invention consists in that the adhesive layer is designed to be continuous over a large area and its surface is partially deactivated.
  • the inactivation is expediently brought about by the fact that the surface of the adhesive layer has elevations and depressions, so that the depressed areas cannot come into contact with the counter surface, but rather only the tips of the elevations as active adhesive elements Act.
  • a prerequisite for this property is that the layer surface cannot be deformed to full contact with the counter surface due to the pressure usually applied during pressing. Since the layer is the more deformable the thicker it is, it should therefore be as thin as possible. Furthermore, it should not be very soft.
  • the surface of the layer of adhesive is partially covered by adhesive-inactive particles, so that only the areas exposed between these particles are fully or partially available as adhesive-active elements.
  • a method for producing such objects is characterized in that a continuous layer of the liquid-containing adhesive is formed on a circumferential intermediate carrier and largely dried before it is transferred to the substrate. It is in fact almost impossible to give the adhesive layer a precisely predetermined ripple or roughness when the substrate is directly coated, especially since the application technique has a smoothing effect and the mass which is necessarily free-flowing when applied shows a tendency to compensate for strong unevenness.
  • the method according to the invention allows the adhesive layer with the desired structure to be produced on the intermediate carrier and solidified so that it retains this structure after being transferred to the substrate. This is possible because the adhesives used do not have a so-called cold flow.
  • This method also has the advantage that the liquid does not have to be expelled only after application to the substrate, so that all of the disadvantages which are often associated with the different effects of drying on the coated and uncoated parts of the substrate are eliminated .
  • the layer does not in itself bind itself as firmly to the substrate as would be the case in the not yet dried, flow-friendly state; however, this is surprisingly compensated for by the fact that a larger layer area is available for the connection of the layer to the substrate than for the connection to the counter surface.
  • the bonding of the layer to the substrate can easily be improved by known means, for example by pretreatment of the substrate surface, by using an adhesion promoter, by heating the substrate surface before the layer is applied, by transferring the layer in the warm Condition on the substrate or the like
  • the structuring of the layer of adhesive by finishing the layer with changing thickness is expediently produced in that the intermediate carrier to form the structural parts of varying thickness has ridges and depressions. points.
  • the depressions can in particular have an elongated shape with an aspect ratio of at least 5 ⁇ , preferably more than 10 or even 20 ⁇ . They preferably run flat at their ends, so that the adhesive mass is more easily detached from the depressions when transferred to the substrate. At the flat tapering ends of the recesses, these exert only a lower retention force on the adhesive mass, so that the entire recesses can be emptied over their length starting from these ends.
  • the direction of the elongated depressions arranged parallel to one another coincides with the direction of the transmission movement or at least includes an angle of less than 90 degrees with it. Then the contact between the substrate surface and the mass particles sitting in the depressions first comes about at the flat ends of the depressions, followed by a peeling movement progressing over the length of the depressions.
  • Another advantage of the flat tapering shape of the thickened parts of the adhesive layer is that they show better anchoring to the substrate.
  • a compound is used whose adhesive strength is higher than would otherwise be appropriate for detachable articles and that this adhesive ability in the area of the surface of use is reduced after transfer to the substrate.
  • This is possible, for example, by changing the chemical-physical state of the mass in the area of its free surface, in particular by chemical or physical treatment, by wet polymerization under the influence of heat, electrical discharge (corona discharge) or short-wave radiation. It is preferred to influence the adhesive force by reducing the adhesive-active surface parts by applying adhesive-inactive particles.
  • These adhesive-inactive particles can be dust-fine, which is intended to express that they are so small that they do not project significantly beyond the mass surface and therefore hardly appear as spacers between the adhesive surface and the counter surface.
  • the free mass surface available between them for the adhesive force can be specifically defined by the scattering amount of the particles.
  • the adhesiveness of the mass is reduced in proportion to its coverage caused by the particles. In this embodiment, the particle sizes are generally less than 5 ⁇ .
  • An embodiment in which the solid particles are larger, namely on average between 5 ⁇ and 50 ⁇ , preferably between 10 and 25 ⁇ , has particularly good properties. If the particles protrude noticeably beyond the level of the adhesive surface, they inactivate not only the surface area directly covered by them, but also the surface area lying in their vicinity, because this is kept away from the counter surface by the particles. In order for this effect to occur, the particles should on average protrude by more than two thirds of their height above the surface of the mass.
  • the drying of the mass on the intermediate carrier is always to be understood as an at least substantial part of the total drying, preferably the entire drying. At least the drying should lead to a water content of less than 10 percent.
  • the residual moisture content of the adhesive is expediently approximately the same level as or less than the moisture content of the paper forming the substrate.
  • Fig. 1 is a schematic side view of a
  • Fig. 2 is a side view of another
  • FIG. 3 shows a longitudinal section through a depression according to the invention in the surface of an intermediate carrier
  • Fig. 4 is a schematic longitudinal section through a paper layer provided with adhesive
  • Fig. 5 shows an adhesive layer with attached
  • FIG. 6 shows the layer according to FIG. 5 in connection with a counter surface
  • the web passes through an application unit 4, in which a primer is applied to the other side, at least in the area that will later be coated with the adhesive, which contains subsequent dryer is dried.
  • the adhesive is applied to the endless intermediate carrier 6, which is designed as a silicone tape, by means of an application 5. Only after sufficient drying is the layer of adhesive in the area of the roller 7 transferred to the web, which if necessary is gently re-dried in the after-dryer 8. Further processing, for example cooling or application of particles, can be carried out in the subsequent plants 9 before the web is rewound at 10.
  • the intermediate carrier was referred to above as an endless belt, for example. Instead of this, a roller can of course also be used. In any case, it is part of the coating system.
  • the material of the intermediate carrier should have the lowest possible affinity to the adhesive mass. For example, it can consist of silicone or polyfluorocarbon with a smooth, structured or finely woven surface.
  • Fig. 2 illustrates the process flow in the processing of sheet goods.
  • the application work 11 applies the adhesive to the endless silicone belt 12, on which it is pre-dried in the dryer, not shown.
  • the sheets pass through a preheating section equipped with infrared radiators 15, indicated by an arrow, to the transfer point 16, where the pre-dried coating is transferred to them, in order to then be conveyed to the sheet depositer 18 under infrared night dryers 17.
  • FIG. 3 schematically illustrates in longitudinal section the shape of the depressions 19 in the intermediate carrier 20.
  • the mass fills the depressions 19.
  • their surface sinks a little, as shown by the broken line 21 is indicated.
  • the depression is greater in the lower area, it is only slight at the ends 22 that run flat.
  • the mass adheres slightly to the surface of the substrate during transfer, so that it can be peeled out of the recess 19 in the course of the transfer movement.
  • the mass on the substrate retains its shape given by the recesses 19.
  • the elevations and depressions of the coating on the substrate 23 according to FIG. 4 can be represented, for example, in such a way that an intermediate adhesive layer 25 sits on a lower adhesion promoter layer 24, which in turn is covered by a main layer 26 indicated by dots, which forms the elevations and depressions and has considerable dimensional stability for this purpose. Despite its reduced adhesive power, it is held firmly on the substrate by the primer 24 or, if necessary, by the adhesive intermediate adhesive layer 25.
  • a layer 27 of adhesive mass is applied to the substrate 23, the thickness of which is a few ⁇ , for example 5 ⁇ on average.
  • the surface is textured with a roughness depth that is also a few ⁇ , for example 2 ⁇ .
  • the surface structuring brings about a reduction in the adhesiveness simply because only the heights of the waves can participate in the adhesive process.
  • a large number of particles 28 are sprinkled on the surface of the adhesive masses 27, the size of which is, for example, on average 5 to 50 and which adhere to the surface of the mass but have not significantly sunk into it and therefore protrude above it. Although they only directly cover a comparatively small part of the mass surface, the reduction in adhesive force caused by them is considerable, as can be seen in the diagram FIG.
  • FIG. 5 shows that indicates that the spacing function of the particles 28 means that wide areas 29, which are immediately adjacent to the particles 28, are excluded from direct contact with the counter surface 30 and thus from gluing, which only exist in the areas 31 can take place at a greater distance from the particles 28.
  • This embodiment has the advantage that the adhesive-inactive areas 29 remain virgin even after the first uses, so that the substrate is still available for bonding even if the surface areas 31 initially involved in the bonding have gradually become inactive due to the absorption of dust if you apply a greater pressure force.
  • the surface of the adhesive composition may or may not have a wavy structure.
  • the spacing effect of the particles depends on their height distance from the plane in which the elevated areas of the mass surface available for the adhesive lie. This level is simply called the surface level.
  • the idea of reducing the adhesiveness of the surface of the adhesive layer by applying adhesive-inactive particles deserves protection regardless of the large-area formation of the adhesive layer. It can also be used when the adhesive is applied to the substrate in the form of small-area elements, for example in the form of dots, lines, spots or calottes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesive Tapes (AREA)

Abstract

Un article ayant une couche adhésive de revêtement et pouvant se détacher à nouveau d'une autre surface, par exemple une feuille de bloc-notes, comprend un matériau adhésif qui forme une surface ayant une pluralité d'éléments superficiels adhésifs séparés les uns des autres. Afin de faciliter sa production, la couche de matériau adhésif est formée de manière continue sur une grande surface et sa surface supérieure est désactivée par endroits, soit parce qu'elle présente des parties creuses et en saillie, soit parce qu'elle est recouverte par endroits de particules non-adhésives. Après séchage et façonnement du matériau adhésif, on applique la couche de revêtement au substrat, sur une couche intermédiaire de support.
PCT/EP1987/000105 1986-02-26 1987-02-25 Article a couche adhesive de revetement et son procede de production WO1987005315A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DEP3606199.9 1986-02-26
DE3606199A DE3606199C2 (de) 1986-02-26 1986-02-26 Verfahren zum Auftragen eines Haftklebers aus einer flüssigkeitshaltigen Masse auf ein Substrat sowie Substrat mit einer mehrfach leicht lösbaren und wiederverwendbaren Kleberschicht
DE19863628784 DE3628784A1 (de) 1986-08-25 1986-08-25 Verfahren zum auftragen eines haftklebers aus einer fluessigkeitshaltigen masse auf ein substrat
DEP3628784.9 1986-08-25
DE19863632816 DE3632816A1 (de) 1986-09-26 1986-09-26 Substrat, dessen oberflaeche eine schicht einer klebfaehigen masse traegt
DEP3632816.2 1986-09-26

Publications (1)

Publication Number Publication Date
WO1987005315A1 true WO1987005315A1 (fr) 1987-09-11

Family

ID=27194062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1987/000105 WO1987005315A1 (fr) 1986-02-26 1987-02-25 Article a couche adhesive de revetement et son procede de production

Country Status (2)

Country Link
EP (1) EP0258353A1 (fr)
WO (1) WO1987005315A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315072A2 (fr) * 1987-10-31 1989-05-10 Nippon Carbide Kogyo Kabushiki Kaisha Couche de colle de contact
EP0429269A1 (fr) * 1989-11-20 1991-05-29 Minnesota Mining And Manufacturing Company Ruban adhésif repositionable sensible à la pression et procédé pour sa fabrication
GB2240729A (en) * 1990-02-13 1991-08-14 Daimatsu Kagaku Kogyo Kk Adhesive sheet
WO1991013752A1 (fr) * 1990-03-16 1991-09-19 Bernard Sanders Element a dispositif d'ecartement
EP0879713A1 (fr) * 1994-08-17 1998-11-25 Minnesota Mining And Manufacturing Company Méthode et dispositif de dépÔt d'une couche de matière sur des feuilles
AU699125B2 (en) * 1994-08-17 1998-11-26 Minnesota Mining And Manufacturing Company Method and apparatus for applying a coating material to sheets
AU721556B2 (en) * 1996-02-16 2000-07-06 Minnesota Mining And Manufacturing Company Improved apparatus and method for applying coating materials to individual sheet members
US6406244B1 (en) 1998-07-09 2002-06-18 Frederic P. A. Le Riche Stack of sheets with repositionable adhesive alternating between opposite edges and containing one or more sheets different from other sheets
EP1400370A1 (fr) * 2002-09-20 2004-03-24 Print Inform GmbH & Co. KG Substrat avec une couche adhésive
EP1354927A3 (fr) * 2002-04-16 2004-12-15 tesa AG Procédé de préparation d' adhésifs thermofusibles et leur utilisation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU711923B2 (en) * 1994-08-17 1999-10-21 Minnesota Mining And Manufacturing Company Apparatus for applying a coating material to sheets

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1594309A1 (de) * 1963-07-20 1969-09-11 Vorwerk & Sohn Verfahren zur Herstellung von luftdurchlaessigen Selbstklebebaendern oder -folien,insbesondere Pflastern
FR1598777A (fr) * 1968-05-10 1970-07-06
DE1594060A1 (de) * 1966-01-08 1970-07-09 Wilh Jackstaedt & Co Mit einer Selbstklebeschicht versehenes flaechenfoermiges Klebematerial
EP0070524A1 (fr) * 1981-07-16 1983-01-26 Nippon Carbide Kogyo Kabushiki Kaisha Structure de feuille autocollante possédant des propriétés amovibles
DE3219094A1 (de) * 1982-05-21 1983-11-24 Reck, Bernd, 5450 Neuwied Verfahren und vorrichtung zum partiellen reduzieren der haftwirkung an doppelseitigen klebebaendern, sowie an den mit diesen klebebaendern zu fixierenden klischees, offsetdrucktuechern und anderen gegenstaenden, sowie an den zur fixierung bestimmten fuegeflaechen
DE3417746A1 (de) * 1984-05-12 1985-11-14 Jackstädt GmbH, 5600 Wuppertal Selbstklebeschicht mit auf der ihrem traeger abgewandten seite angeordneter abdeckung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1594309A1 (de) * 1963-07-20 1969-09-11 Vorwerk & Sohn Verfahren zur Herstellung von luftdurchlaessigen Selbstklebebaendern oder -folien,insbesondere Pflastern
DE1594060A1 (de) * 1966-01-08 1970-07-09 Wilh Jackstaedt & Co Mit einer Selbstklebeschicht versehenes flaechenfoermiges Klebematerial
FR1598777A (fr) * 1968-05-10 1970-07-06
EP0070524A1 (fr) * 1981-07-16 1983-01-26 Nippon Carbide Kogyo Kabushiki Kaisha Structure de feuille autocollante possédant des propriétés amovibles
DE3219094A1 (de) * 1982-05-21 1983-11-24 Reck, Bernd, 5450 Neuwied Verfahren und vorrichtung zum partiellen reduzieren der haftwirkung an doppelseitigen klebebaendern, sowie an den mit diesen klebebaendern zu fixierenden klischees, offsetdrucktuechern und anderen gegenstaenden, sowie an den zur fixierung bestimmten fuegeflaechen
DE3417746A1 (de) * 1984-05-12 1985-11-14 Jackstädt GmbH, 5600 Wuppertal Selbstklebeschicht mit auf der ihrem traeger abgewandten seite angeordneter abdeckung

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315072A2 (fr) * 1987-10-31 1989-05-10 Nippon Carbide Kogyo Kabushiki Kaisha Couche de colle de contact
EP0315072A3 (en) * 1987-10-31 1990-04-04 Nippon Carbide Kogyo Kabushiki Kaisha Pressure-sensitive adhesive layer
US5008139A (en) * 1987-10-31 1991-04-16 Nippon Carbide Kogyo Kabushiki Kaisha Pressure-sensitive adhesive layer
EP0429269A1 (fr) * 1989-11-20 1991-05-29 Minnesota Mining And Manufacturing Company Ruban adhésif repositionable sensible à la pression et procédé pour sa fabrication
GB2240729A (en) * 1990-02-13 1991-08-14 Daimatsu Kagaku Kogyo Kk Adhesive sheet
WO1991013752A1 (fr) * 1990-03-16 1991-09-19 Bernard Sanders Element a dispositif d'ecartement
AU702685B2 (en) * 1994-08-17 1999-03-04 Minnesota Mining And Manufacturing Company Method and apparatus for applying a coating material to sheets
EP1234682A2 (fr) 1994-08-17 2002-08-28 Minnesota Mining And Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
EP0882602A2 (fr) * 1994-08-17 1998-12-09 Minnesota Mining And Manufacturing Company Méthode et dispositif de dépÔt d'une couche de matière sur des feuilles
EP0882602A3 (fr) * 1994-08-17 1998-12-23 Minnesota Mining And Manufacturing Company Méthode et dispositif de dépôt d'une couche de matière sur des feuilles
EP0879713A1 (fr) * 1994-08-17 1998-11-25 Minnesota Mining And Manufacturing Company Méthode et dispositif de dépÔt d'une couche de matière sur des feuilles
EP1531061A3 (fr) * 1994-08-17 2006-11-22 Minnesota Mining and Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
EP1531061A2 (fr) 1994-08-17 2005-05-18 Minnesota Mining and Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
AU699125B2 (en) * 1994-08-17 1998-11-26 Minnesota Mining And Manufacturing Company Method and apparatus for applying a coating material to sheets
EP1234683A2 (fr) * 1994-08-17 2002-08-28 Minnesota Mining And Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
EP1234683A3 (fr) * 1994-08-17 2002-10-02 Minnesota Mining And Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
EP1234682A3 (fr) * 1994-08-17 2002-10-02 Minnesota Mining And Manufacturing Company Procédé et dispositif de dépôt d'une couche de matière sur des feuilles
AU721556B2 (en) * 1996-02-16 2000-07-06 Minnesota Mining And Manufacturing Company Improved apparatus and method for applying coating materials to individual sheet members
US6669992B2 (en) 1997-07-11 2003-12-30 3M Innovative Properties Company Stack of sheets with repositionable adhesive alternating between opposite edges and containing one of more sheets different from other sheets
US6406244B1 (en) 1998-07-09 2002-06-18 Frederic P. A. Le Riche Stack of sheets with repositionable adhesive alternating between opposite edges and containing one or more sheets different from other sheets
EP1354927A3 (fr) * 2002-04-16 2004-12-15 tesa AG Procédé de préparation d' adhésifs thermofusibles et leur utilisation
EP1400370A1 (fr) * 2002-09-20 2004-03-24 Print Inform GmbH & Co. KG Substrat avec une couche adhésive

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