DE102006017881B4 - Process for producing an adhesive film - Google Patents
Process for producing an adhesive film Download PDFInfo
- Publication number
- DE102006017881B4 DE102006017881B4 DE102006017881A DE102006017881A DE102006017881B4 DE 102006017881 B4 DE102006017881 B4 DE 102006017881B4 DE 102006017881 A DE102006017881 A DE 102006017881A DE 102006017881 A DE102006017881 A DE 102006017881A DE 102006017881 B4 DE102006017881 B4 DE 102006017881B4
- Authority
- DE
- Germany
- Prior art keywords
- adhesive film
- polar
- protective layer
- film
- adhesive
- 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.)
- Active
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C65/76—Making non-permanent or releasable joints
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- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B29C66/45—Joining of substantially the whole surface of the articles
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- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4023—Coloured on the layer surface, e.g. ink
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
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- 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
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/538—Roughness
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/728—Hydrophilic
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- 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
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- B32B2307/748—Releasability
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- 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
- B32B2405/00—Adhesive articles, e.g. adhesive tapes
Abstract
Verfahren zur Herstellung einer Adhäsionsfolie (1) aus thermoplastischem Kunststoff, wobei die Adhäsionsfolie (1) eine Vorderseite (10) und eine Rückseite (11) aufweist und zumindest mit ihrer Rückseite (11) klebstofffrei auf polaren Oberflächen haftet und eine Härte nach Shore-D von höchstens 60 aufweist, dadurch gekennzeichnet, dass in einem ersten Schritt die Adhäsionsfolie (1) aus dem thermoplastischen Kunststoff mittels Kalandrieren hergestellt wird und nachfolgend in einem zweiten Schritt unmittelbar nach dem Kalandrieren auf eine Temperatur unterhalb 50°C abgeschreckt wird und dann in einem dritten Schritt auf die Rückseite (11) der Adhäsionsfolie (1) eine polare Schutzschicht (2) durch Kaschieren mittels beheizter Walzen einer Temperatur von 85°C–95°C aufgebracht wird, wodurch die Rückseite (11) der Adhäsionsfolie eine Oberflächenrauhigkeit erhält, die mindestens 50% niedriger als die Oberflächenrauhigkeit der Vorderseite (10) ist und die polare Schutzschicht (2) vor dem Aufbringen der Adhäsionsfolie (1) auf die polare Oberfläche von der Rückseite (11) abziehbar ist.A process for producing an adhesive film (1) made of thermoplastic material, wherein the adhesive film (1) has a front side (10) and a back side (11) and adheres at least with its rear side (11) adhesive-free on polar surfaces and a hardness according to Shore-D of at most 60, characterized in that in a first step, the adhesive film (1) is made of the thermoplastic material by calendering and subsequently quenched in a second step immediately after calendering to a temperature below 50 ° C and then in a third Step on the back (11) of the adhesive film (1) a polar protective layer (2) by laminating by means of heated rolls of a temperature of 85 ° C-95 ° C is applied, whereby the back (11) of the adhesive film receives a surface roughness, the at least 50% lower than the surface roughness of the front (10) and the polar Schutzschich t (2) can be pulled off the back surface (11) before the adhesive film (1) is applied to the polar surface.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Adhäsionsfolie aus thermoplastischem Kunststoff, welche eine Vorderseite und eine Rückseite aufweist und zumindest mit ihrer Rückseite klebstofffrei auf polaren Oberflächen, beispielsweise Glas- oder Kunststoffflächen haftet.The invention relates to a method for producing an adhesive film made of thermoplastic material, which has a front side and a rear side and adheres at least with its rear side adhesive-free on polar surfaces, such as glass or plastic surfaces.
Es ist bereits seit längerem bekannt, dass Folien aus weichem Polyvinylchlorid (PVC) allein durch Adhäsion, d. h. ohne Hinzunahme zusätzlicher Klebstoffe auf glatten Oberflächen haften.It has long been known that films of soft polyvinyl chloride (PVC) can be obtained by adhesion alone, ie. H. adhere to smooth surfaces without the addition of additional adhesives.
Um derartige Folien jedoch für eine Anwendung z. B. zur Verklebung auf Glas- oder Kunststoffflächen handhabbar zu machen und eine dauerhafte Anhaftung an den polaren Oberflächen zu gewährleisten, wurden derartige Adhäsionsfolien bislang mit Trägerschichten versehen, die eine gewünschte Dimensionsstabilität der bekannten Adhäsionsfolien sicherstellten, wozu beispielhaft auf die
Die Herstellung von derartigen Verbundfolien, bestehend aus einer Trägerschicht und einer zusätzlich aufgebrachten und möglichst dünnen Adhäsionsfolie ist jedoch aufwendig und lässt sich in größerem Produktionsmaßstab nur schwierig umsetzen. Darüber hinaus lässt die mit den bekannten Adhäsionsfolien erzielbare Haftung auf den polaren Oberflächen, insbesondere Glas und/oder Kunststoff auf längere Anwendungszeiträume hin zu wünschen übrig.However, the production of such composite films, consisting of a carrier layer and an additionally applied and as thin as possible adhesive film is expensive and can be difficult to implement in larger production scale. In addition, the achievable with the known adhesive films adhesion to the polar surfaces, in particular glass and / or plastic for longer periods of use leaves to be desired.
Aus der
Die
Aus der
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zur Herstellung einer Adhäsionsfolie der eingangs genannten Art sowie eine entsprechende Adhäsionsfolie vorzuschlagen, welche auch in großindustriellem Maßstab mit verringertem Aufwand herstellbar ist und die sich darüber hinaus durch eine besonders hohe Haftung an polaren Oberflächen, wie Glas oder Kunststoff, auszeichnet, selbst wenn die Adhäsionsfolie vor ihrem Aufbringen bereits über einen längeren Zeitraum gelagert worden ist.The object of the present invention is to propose a method for producing an adhesive film of the type mentioned at the outset and a corresponding adhesive film which can be produced on a large industrial scale with reduced expenditure and which, moreover, can be achieved by a particularly high adhesion to polar surfaces, such as glass or Plastic, characterized, even if the adhesive film has been stored for a long period before their application.
Zur Lösung der gestellten Aufgabe schlägt die Erfindung die Ausbildung eines Verfahrens gemäß Patentanspruch 1 vor.To solve the problem, the invention proposes the formation of a method according to claim 1.
Vorteilhafte Ausgestaltungen und Weiterbildungen des erfindungsgemäßen Verfahrens und der erfindungsgemäßen Adhäsionsfolie sind Gegenstand der jeweiligen Unteransprüche.Advantageous embodiments and further developments of the method according to the invention and the adhesive film according to the invention are the subject of the respective subclaims.
Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass in einem ersten Schritt die Adhäsionsfolie aus dem thermoplastischen Kunststoff mittels Kalandrieren hergestellt wird und nachfolgend in einem zweiten Schritt unmittelbar nach dem Kalandrieren auf eine Temperatur unterhalb 50°C abgeschreckt wird und dann in einem dritten Schritt auf die Rückseite der Adhäsionsfolie eine polare Schutzschicht durch Kaschieren mittels beheizter Walzen einer Temperatur von 85°C–95°C aufgebracht wird, wodurch die Rückseite der Adhäsionsfolie eine Oberflächenrauhigkeit erhält, die mindestens 50% niedriger als die Oberflächenrauhigkeit der Vorderseite ist und die polare Schutzschicht vor dem Aufbringen der Adhäsionsfolie auf die polare Oberfläche von der Rückseite abziehbar ist.The inventive method is characterized in that in a first step, the adhesive film of the thermoplastic material is produced by calendering and is quenched in a second step immediately after calendering to a temperature below 50 ° C and then in a third step on the On the reverse side of the adhesive film, a polar protective layer is applied by means of heated rolls at a temperature of 85 ° C.-95 ° C., giving the back side of the adhesive film a surface roughness which is at least 50% lower than the surface roughness of the front side and the polar protective layer before Applying the adhesive film on the polar surface of the back is removable.
Die nach dem erfindungsgemäßen Verfahren hergestellte Adhäsionsfolie aus thermoplastischem Kunststoff zeichnet sich demnach durch eine Härte nach Shore-D von höchstens 60 und eine deutlich verringerte Oberflächenrauhigkeit der Rückseite aus.The adhesive film made of thermoplastic material produced by the process according to the invention is therefore characterized by a Shore D hardness of at most 60 and a significantly reduced surface roughness of the back side.
Übliche ungeprägte und im Kalandrierverfahren hergestellte Folien z. B. auf Basis von PVC weisen Oberflächenrauhigkeiten Ra von etwa 1 bis 3 μm auf. Eine solche Oberflächenrauhigkeit stellt sich demgemäß auch auf der Vorderseite der nach dem erfindungsgemäßen Verfahren hergestellten Adhäsionsfolie ein. Durch die erfindungsgemäße Verfahrensführung mit starkem Abschrecken der Adhäsionsfolie von z. B. 160°C auf unter 50°C und nachfolgendes Kaschieren mit einer polaren Schutzschicht zwischen beheizten Walzen einer Temperatur von vorzugsweise 85 bis 95°C werden Oberflächenrauhigkeiten der Rückseite von nur noch 0,05 bis 0,25 μm Ra erhalten. Eine solchermaßen glatte Rückseite einer Adhäsionsfolie weist überragende Haftungseigenschaften auf polaren Oberflächen, z. B. Glasflächen auch über lange Zeiträume auf.Usual unembossed and calendered films produced z. B. based on PVC have surface roughness Ra of about 1 to 3 microns. Such a surface roughness arises accordingly also on the front of the adhesive film produced by the process according to the invention. By the method of the invention with strong quenching of the adhesive film of z. B. 160 ° C to below 50 ° C and subsequent lamination with a polar protective layer between heated rolls at a temperature of preferably 85 to 95 ° C surface roughnesses of the back of only 0.05 to 0.25 microns Ra are obtained. Such a smooth back of an adhesive film has superior adhesion properties on polar surfaces, eg. B. glass surfaces over long periods on.
Durch Beschränkung der Härte und der Oberflächenrauhigkeiten auf die angegebenen Werte wird eine maximale Anzahl von Haftzentren auf der auf die polare Oberfläche aufzubringende Rückseite der erfindungsgemäßen Adhäsionsfolie generiert, welche überraschend hohe Haftkräfte zwischen der Rückseitenoberfläche der Adhäsionsfolie und der polaren Oberfläche, auf die die Adhäsionsfolie aufgebracht ist, sicherstellt.By limiting the hardness and the surface roughness to the specified values, a maximum number of adhesion centers is generated on the back of the adhesion film of the invention to be applied to the polar surface, which has surprisingly high adhesive forces between the backside surface of the adhesion film and the polar surface to which the adhesion film is applied , make sure.
Die Aufbringung der erfindungsgemäßen Adhäsionsfolie auf der polaren Oberfläche kann bevorzugt über einen Wasserfilm zwischen den Kontaktflächen erfolgen, wodurch eine elektrochemische Doppelschicht erzeugt wird, die die Haftung nochmals erheblich verbessert. Der Wasserfilm kann beispielsweise durch Besprühen der für die Aufbringung der Adhäsionsfolie vorgesehenen polaren Oberfläche mit einem Wassernebel erfolgen.The application of the adhesion film according to the invention on the polar surface can preferably take place via a water film between the contact surfaces, whereby an electrochemical double layer is produced which again considerably improves the adhesion. The water film can be made, for example, by spraying the polar surface provided for the application of the adhesive film with a water mist.
Um die polaren Haftzentren der erfindungsgemäßen Adhäsionsfolie über einen langen Zeitraum, beispielsweise einen Lagerungszeitraum vor der Aufbringung aktiv zu halten bzw. zu fixieren, wird auf die Rückseite der Adhäsionsfolie eine polare Schutzschicht aufgebracht, welche eine geeignete Oberflächenenergie aufweist und infolgedessen klebstofffrei an der Rückseite der Adhäsionsfolie haftet und erst unmittelbar vor dem Aufbringen der Adhäsionsfolie auf der polaren Oberfläche von der Rückseite durch Abziehen entfernt wird.In order to actively hold or fix the polar adhesive centers of the adhesive film of the invention over a long period of time, for example a storage period before application, a polar protective layer is applied to the back side of the adhesive film, which has a suitable surface energy and, consequently, adhesive-free at the backside of the adhesive film adheres and is removed immediately before the application of the adhesive film on the polar surface of the back by peeling off.
Beim Abziehen dieser Schutzschicht werden polare Gruppen auf der Rückseitenoberfläche der Adhäsionsfolie freigelegt, die nachfolgend die gewünschte klebstofffreie starke Haftung auf der polaren Oberfläche, z. B. Glas oder Kunststoff, bewirken.When this protective layer is peeled off, polar groups on the back surface of the adhesive film are exposed, which subsequently produce the desired adhesive-free strong adhesion to the polar surface, e.g. As glass or plastic effect.
Erfindungsgemäß wird hierzu vorgeschlagen, die polare Schutzschicht durch Kaschieren auf die Rückseite der Adhäsionsfolie aufzubringen. Hierbei wird nach Herstellung und Abschreckung der Adhäsionsfolie wahlweise inline oder in einem separaten Arbeitsgang die vorgefertigte Schutzschicht gemeinsam mit der Adhäsionsfolie in den Walzenspalt zwischen den beheizten Walzen der Kaschieranlage eingeführt, wobei nicht nur eine selbsttätige Verbindung zwischen der Adhäsionsfolie und der Schutzschicht bewirkt wird, sondern darüber hinaus die Schutzschicht der Rückseite der Adhäsionsfolie auch die gewünschte geringe Oberflächenrauhigkeit verleiht, weiche nachfolgend für die gute Haftung von Vorteil ist.According to the invention, it is proposed for this purpose to apply the polar protective layer to the rear side of the adhesion film by laminating. Here, after preparation and quenching of the adhesive film either inline or in a separate operation, the prefabricated protective layer is introduced together with the adhesive film in the nip between the heated rollers of Kaschieranlage, not only an automatic connection between the adhesive film and the protective layer is effected, but about In addition, the protective layer of the back of the adhesive film also gives the desired low surface roughness, which is subsequently advantageous for the good adhesion.
Das erfindungsgemäße Verfahren nutzt von daher die durch Kaschieren aufgebrachte Schutzschicht in zweierlei Hinsicht, nämlich zum einen für die Erzeugung polarer Gruppen an der Rückseitenoberfläche beim Abziehen der Schutzschicht, so dass die Anhaftung an polaren Oberflächen erfolgen kann, und nutzt zum anderen die Schutzschicht auch zur Erzeugung einer besonders glatten Rückseitenoberfläche, die wiederum die Haftung auf polaren Oberflächen steigert.The method according to the invention therefore uses the protective layer applied by laminating in two respects, namely the generation of polar groups on the back surface during stripping of the protective layer, so that it can adhere to polar surfaces, and secondly utilizes the protective layer for the production a particularly smooth back surface, which in turn increases the adhesion to polar surfaces.
Weiter bevorzugt ist es, die Verbindung zwischen der Adhäsionsfolie und der Schutzschicht durch Erwärmung der Schutzschicht vor dem Kaschieren zu verbessern, d. h. ein sogenanntes Thermokaschieren in der vorangehend bereits erläuterten Weise durchzuführen.It is further preferred to improve the connection between the adhesive film and the protective layer by heating the protective layer before laminating, i. H. to perform a so-called thermal lamination in the manner already explained above.
Eine derartige Adhäsionsfolie kann bevorzugt eine Dicke von 100 bis 1.000 μm aufweisen.Such an adhesive film may preferably have a thickness of 100 to 1,000 μm.
Gemäß einem Vorschlag der Erfindung wird hierbei als thermoplastischer Kunststoff ein Weich-PVC verwendet, bei welchem man sich die dem Weich-PVC ohnehin innewohnende Polarität zunutze macht. Bei der Herstellung der Adhäsionsfolie aus einem Weich-PVC ist hinsichtlich der Rezeptur darauf zu achten, dass eine genügend große Polarität erzeugt wird, während die Weichheit des Weich-PVCs mit einer Shore-Härte D kleiner 60 sicherstellt, dass Bewegungen der Ladungsträger innerhalb der Adhäsionsfolie ermöglicht sind und die Oberfläche z. B. an Glasoberflächen optimal zur Anlage gebracht werden kann.According to a proposal of the invention in this case is used as a thermoplastic plastic, a soft PVC, in which one makes use of the soft PVC inherent anyway polarity advantage. When producing the adhesive film from a flexible PVC, care must be taken with respect to the formulation that a sufficiently large polarity is produced, while the softness of the soft PVC having a Shore hardness D less than 60 ensures that movements of the charge carriers within the adhesion film are possible and the surface z. B. can be brought to glass surfaces optimally to the plant.
Alternativ kann die erfindungsgemäße Adhäsionsfolie auch aus einem an sich unpolaren thermoplastischen Kunststoff, z. B. einem thermoplastischen Polyolefin hergestellt werden, welches durch eine Oberflächenaktivierung, wie Beflammen, Plasmabehandlung oder Coronabehandlung polarisiert wird und damit eine klebstofffreie Haftung auf polaren Oberflächen ermöglicht.Alternatively, the adhesive film of the invention may also consist of a per se nonpolar thermoplastic, z. As a thermoplastic polyolefin are prepared, which is polarized by a surface activation, such as flaming, plasma treatment or corona treatment and thus allows an adhesive-free adhesion to polar surfaces.
Die im Rahmen der Erfindung vorgeschlagene und unmittelbar vor dem Aufbringen der Rückseite der Adhäsionsfolie auf einer polaren Oberfläche abziehbare polare Schutzschicht ist bevorzugt aus einer Folie auf Basis des verwendeten polaren thermoplastischen Kunststoffes gebildet. Selbstverständlich ist es auch möglich, einen Verbund aus einem Trägersubstrat und einer auf das Trägersubstrat aufgebrachten und der Rückseite der Adhäsionsfolie zugewandten Beschichtung auf Basis des polaren thermoplastischen Kunststoffes als Schutzschicht zu verwenden, beispielsweise ein entsprechend polymerbeschichtetes Papier. Als polarer thermoplastischer Kunststoff für die Schutzschicht kommt insbesondere Polyester in Frage, welches neben hoher Polarität auch eine hochglatte Oberfläche ausbildet, die beim erfindungsgemäß vorgeschlagenen Kaschieren bzw. Thermokaschieren auf die Rückseite der Adhäsionsfolie derselben die gewünschte geringe Oberflächenrauhigkeit verleiht. The proposed in the invention and immediately before the application of the back of the adhesive film on a polar surface peelable polar protective layer is preferably formed from a film based on the used polar thermoplastic material. Of course, it is also possible to use a composite of a carrier substrate and a coating applied to the carrier substrate and facing the back of the adhesive film on the basis of the polar thermoplastic material as a protective layer, for example a correspondingly polymer-coated paper. Particularly suitable as a polar thermoplastic for the protective layer is polyester, which, in addition to high polarity, also forms a highly smooth surface, which gives the desired low surface roughness to the back of the adhesion film in the case of the laminating or thermo-laminating proposed according to the invention.
Je nach Einsatzzweck der erfindungsgemäßen Adhäsionsfolie ist es möglich, die Vorderseite derselben auf verschiedene Weise zu gestalten. So kann z. B. eine Druck- oder Lackschicht auf die Vorderseite der Adhäsionsfolie aufgebracht sein, darüber hinaus ist es auch möglich, mindestens eine weitere Folienschicht haftfest auf die Vorderseite aufzubringen. Schließlich ist es auch möglich, die Adhäsionsfolie zumindest auf ihrer Vorderseite mit einer Oberflächenprofilierung, z. B. einer Prägung zu versehen.Depending on the intended use of the adhesive film according to the invention, it is possible to design the front side thereof in different ways. So z. As a pressure or paint layer may be applied to the front of the adhesive film, moreover, it is also possible to apply at least one further film layer adherent to the front. Finally, it is also possible, the adhesive film at least on its front with a surface profiling, z. B. to provide an embossing.
Auch im Falle einer derartigen Prägung oder Oberflächenprofilierung der Adhäsionsfolie weist deren Rückseite die erfindungsgemäß vorgeschlagene besonders niedrige Oberflächenrauhigkeit auf. So kann die Vorderseite eine Prägung aufweisen, die zu einer Oberflächenrauhigkeit Ra dieser Vorderseite von z. B. 200 bis 300 μm führt. In diesem Falle ist es aber durch das erfindungsgemäße Verfahren möglich, eine Oberflächenrauhigkeit der Rückseite dieser geprägten Adhäsionsfolie von lediglich 1 bis 5 μm Ra zu erhalten, so dass die gute Haftung auf polaren Oberflächen gewährleistet ist.Even in the case of such embossing or surface profiling of the adhesive film whose back has the inventively proposed particularly low surface roughness. Thus, the front side may have an embossing which leads to a surface roughness Ra of this front side of z. B. 200 to 300 microns leads. In this case, however, it is possible by the inventive method to obtain a surface roughness of the back of this embossed adhesive film of only 1 to 5 microns Ra, so that the good adhesion is ensured on polar surfaces.
Darüber hinaus können weitere Eigenschaften der erfindungsgemäßen Adhäsionsfolie durch Zusatz geeigneter Pigmente zum thermoplastischen Kunststoff derselben eingestellt werden.In addition, further properties of the adhesion film according to the invention can be adjusted by adding suitable pigments to the thermoplastic material of the same.
Derartige Pigmente können z. B. eine gewünschte Einfärbung der Adhäsionsfolie in einer gewünschten Farbe hervorrufen.Such pigments may, for. B. cause a desired coloring of the adhesive film in a desired color.
Ferner ist es möglich, durch funktionelle Pigmente, etwa Infrarotlicht (IR-Licht) oder ultraviolettes Licht (UV-Licht) reflektierende oder absorbierende Pigmente, entsprechende Eigenschaften der Adhäsionsfolie hervorzurufen.Furthermore, it is possible by functional pigments, such as infrared light (IR light) or ultraviolet light (UV light) reflecting or absorbing pigments to cause corresponding properties of the adhesive film.
Eine weitere mögliche Ausführungsform der erfindungsgemäßen Adhäsionsfolie sieht vor, dass sie photochrom ausgebildet ist, d. h. sie zeigt durch Einwirkung von Lichteinstrahlung eine reversible Farbveränderung, wobei die Anregung z. B. über natürliches Sonnenlicht oder künstliches Licht mit einem Anteil an UV-Strahlen erfolgen kann.Another possible embodiment of the adhesive film according to the invention provides that it is formed photochromic, d. H. it shows by the action of light irradiation, a reversible color change, wherein the excitation z. B. on natural sunlight or artificial light can be done with a proportion of UV rays.
Derartige photochrome Adhäsionsfolien eignen sich z. B. als Tönungsfolien für Visiere von Helmen oder auch als Sonnenschutz für Glasflächen.Such photochromic adhesive films are suitable for. B. as tinting foils for visors of helmets or as a sunscreen for glass surfaces.
Derartige photochrome Effekte können z. B. durch pigmentierte Lacke oder Beschichtungen erzielt werden, in einer besonders bevorzugten Ausgestaltung der erfindungsgemäßen Adhäsionsfolie ist jedoch vorgesehen, zur photochromen Ausbildung ein Spiro-naphtoxazin oder ein Naphtopyran in einer Menge von 0,02 bis 0,1 Gew.-% pro 50 Gewichtsteile des thermoplastischen Kunststoffes in die Adhäsionsfolie einzubringen.Such photochromic effects can, for. As can be achieved by pigmented paints or coatings, in a particularly preferred embodiment of the adhesive film according to the invention, however, provided for photochromic training a spiro-naphthoxazine or a naphthopyran in an amount of 0.02 to 0.1 wt .-% per 50 parts by weight to introduce the thermoplastic in the adhesive film.
Derartige Spiro-naphtoxazine oder Naphtopyrane sind in Form photochromer Pigmente bekannt, wozu beispielhaft auf die
Es hat sich im Rahmen der Erfindung gezeigt, dass derartige photochrom ausgebildete Adhäsionsfolien einen hohen Sonnenschutz, insbesondere vor unerwünschter UV-Strahlung bieten, gleichzeitig aber auch bei erhöhter Sonneneinstrahlung ihre klebstofffreie Haftung auf polaren Oberflächen, insbesondere Glasflächen auch über längere Zeiträume nicht verlieren.It has been found within the scope of the invention that such photochromic adhesive films provide a high level of sun protection, in particular unwanted UV radiation, but at the same time not lose their adhesive-free adhesion to polar surfaces, especially glass surfaces even for prolonged periods of time at elevated solar radiation.
Es kann auch vorgesehen sein, die der Adhäsionsfolie abgewandte Oberfläche der Schutzschicht mit einer Bedruckung zu versehen, um beispielsweise werbliche Kennzeichnungen oder auch Rasterlinien für den Zuschnitt der Adhäsionsfolie anzubringen.It can also be provided to provide the adhesive film facing away from the surface of the protective layer with a print to attach, for example, promotional labels or grid lines for cutting the adhesive film.
Zusätzlich zu oder anstelle der Bedruckung kann die der Adhäsionsfolie abgewandte Oberfläche der Schutzschicht auch mit einem Lackauftrag, vorzugsweise auf Basis eines Polyamidlackes versehen sein, der zum einen als Schutz für die eventuell vorgesehene Bedruckung dient, darüber hinaus aber auch für eine bessere Konfektionierung der auf Rollen gewickelten erfindungsgemäßen Adhäsionsfolie sorgt, da teleskopierte Rollen leicht wieder gestaucht werden können. In addition to or instead of the printing, the surface of the protective layer facing away from the adhesive film can also be provided with a coating application, preferably based on a polyamide paint, which serves as protection for the possibly provided printing, but also for a better finishing of the rolls wound adhesive film of the invention provides because telescoped rollers can be easily compressed again.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen in der Zeichnung in weiteren Einzelheiten erläutet. Es zeigen:The invention will be explained below with reference to embodiments in the drawing in further detail. Show it:
Aus der
Auf die Rückseite
Eine derartige durch Abziehen der Schutzschicht
Zur Erzielung bestimmter gewünschter Eigenschaften der Adhäsionsfolie
Ferner kann durch Zusatz von Pigmenten eine Einfärbung bzw. durch Zusatz entsprechender funktioneller Pigmente z. B. eine UV- oder IR-Licht reflektierende oder absorbierende Eigenschaft eingestellt werden.Furthermore, by adding pigments coloring or by adding appropriate functional pigments z. B. a UV or IR light reflecting or absorbing property can be adjusted.
Sofern die Adhäsionsfolie
Die Verbindung zwischen Schutzschicht
Auf diese Weise wird eine Oberflächenrauhigkeit der Rückseite
Wenn beispielsweise die Vorderseite
Diese niedrigen Oberflächenrauhigkeiten der Rückseite
Bei der aus der
Ausführungsbeispiele:EXAMPLES
Als Adhäsionsfolie wurden transparente Folien aus Weich-PVC einer Dicke von jeweils 0,23 mm und einem Flächengewicht von 305 g/m2 mit verschiedener Härte unter Zuhilfenahme eines Kalanders hergestellt und nach dem Kalandrieren von 160°C auf etwa 50°C abgeschreckt. Gleichzeitig wurde die solchermaßen hergestellte Folie in einem Prägewerk mit einer Narbung versehen.As an adhesive film transparent films of soft PVC were made a thickness of 0.23 mm and a basis weight of 305 g / m 2 with different hardness with the aid of a calender and quenched after calendering from 160 ° C to about 50 ° C. At the same time, the film produced in this way was provided with a grain in a stamping mill.
Eine aus einer Polyesterfolie einer Dicke von 0,015 mm gebildete Schutzschicht wurde auf der Rückseite der Adhäsionsfolien unmittelbar aufkaschiert, und nach Abkühlung wurden die Schutzschichten von den Adhäsionsfolien abgezogen und die Adhäsionsfolien mit ihrer dergestalt freigelegten Rückseite auf eine Glasfläche aufgebracht, an der sie klebstofffrei anhafteten. Es wurden die jeweiligen Shore-Härten, Abziehkräfte auf der Glasfläche sowie die erzielbare Oberflächenspannung der Rückseite der Adhäsionsfolie gemessen. Die Ergebnisse sind in der Tabelle 1 dargestellt. Tabelle 1
Beide Adhäsionsfolien gemäß Versuch 1 und Versuch 2 zeigten hohe Haftung auf Glasoberflächen, wobei die erzielbare Haftung bei der Folie gemäß Versuch 2 infolge der geringeren Shore-Härte noch höher ausfiel als bei Versuch 1.Both adhesion films according to experiment 1 and
Claims (17)
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DE102006017881A DE102006017881B4 (en) | 2005-04-18 | 2006-04-13 | Process for producing an adhesive film |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2217256A (en) * | 1988-04-21 | 1989-10-25 | Wallace Business Services Limi | Plastics film laminates having non-adhesive cling properties |
US5698621A (en) * | 1992-03-06 | 1997-12-16 | Achilles Usa, Inc. | Printable self-clinging polyvinyl chloride film and methods relating thereto |
WO2001012619A1 (en) * | 1999-08-11 | 2001-02-22 | James Robinson Limited | Rapid fading photo-responsive materials |
DE10012261A1 (en) * | 2000-03-14 | 2001-09-27 | Holger Hoefer | Film useful as a label, protective surface or reinforcement, comprises a thick support layer and an adhesive free adhesion coating of plasticized PVC. |
US6326081B1 (en) * | 1997-09-26 | 2001-12-04 | Tredegar Film Products Corporation | Masking film and method for producing same |
US6595632B1 (en) * | 2002-02-25 | 2003-07-22 | Felix Schoeller Technical Papers, Inc. | Ink-jet printable vinyl films with improved curl properties |
-
2006
- 2006-04-13 DE DE102006017881A patent/DE102006017881B4/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2217256A (en) * | 1988-04-21 | 1989-10-25 | Wallace Business Services Limi | Plastics film laminates having non-adhesive cling properties |
US5698621A (en) * | 1992-03-06 | 1997-12-16 | Achilles Usa, Inc. | Printable self-clinging polyvinyl chloride film and methods relating thereto |
US6326081B1 (en) * | 1997-09-26 | 2001-12-04 | Tredegar Film Products Corporation | Masking film and method for producing same |
WO2001012619A1 (en) * | 1999-08-11 | 2001-02-22 | James Robinson Limited | Rapid fading photo-responsive materials |
DE10012261A1 (en) * | 2000-03-14 | 2001-09-27 | Holger Hoefer | Film useful as a label, protective surface or reinforcement, comprises a thick support layer and an adhesive free adhesion coating of plasticized PVC. |
US6595632B1 (en) * | 2002-02-25 | 2003-07-22 | Felix Schoeller Technical Papers, Inc. | Ink-jet printable vinyl films with improved curl properties |
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