Method of adhesive removal

Abstract

The invention relates to a method for removing adhesive, in particular aqueous adhesive, from an adhesive carrier, in particular from an adhesive application roller, comprising the steps of: a) providing a cleaning agent comprising natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion and / or a styrene-butadiene I <autschul<-Dispersion, eine Ethylen-Vinylacetat-Dispersion, eine Ethylen-Vinylacetat-Copolymer-Dispersion, eine Polyvinylacetat-Dispersion, eine Polyvinylacetat-Copolymer-Dispersion, eine Epoxidharz-Dispersion, eine Polyamid-Dispersion, eine Nitril-Vinylacetat-Dispersion und / oder eine Nitril-Vinylacetat-Copolymer-Dispersion, b) Auftragen des Reinigungsmittels auf den Klebstoffträger, c) Gleichmässiges Verteilen des Reinigungsmittels auf dem Klebstoffträger und Vermischen mit dem Klebstoff unter Ausbildung eines Klebstoff-Reinigungsmittel-Films,d) Allow the adhesive-cleaning agent film to dry and e) Peel the dry adhesive-cleaning agent film off the adhesive substrate.

Description

Technical area

[0001] The invention relates to a method for removing adhesive from an adhesive carrier, in particular from a 1 <lebstoffauftragswalze, mit einem Reinigungsmittel. Ausserdem betrifft die Erfindung die Verwendung eines Reinigungsmittels zur Entfernung von Klebstoff von einem Klebstoffträger, insbesondere von einer Klebstoffauftragswalze. State of the art

[0002] It is common practice to remove adhesive on 1 <lebstoffträgern, wie z.B. Walzen, Wasser einzusetzen. Dabei werden die Klebstoffträger mit einer Kombination aus Wasser und Reinigungsmittel oder nur mit Wasser gereinigt, wobei das resultierende Waschwasser nach dem Reinigungsvorgang Klebstoffkomponenten enthält. Ein solches Reinigungsverfahren ist jedoch nachteilig, da das Waschwasser nicht ohne Vorbehandlung in die Kanalisation eingeleitet werden darf und deshalb kostenintensiv und aufwendig entsorgt werden muss.

[0003] This problem has been partially addressed by developing cleaning methods that require less or no water.

[0004] In this context, patent application DE 10 2021 121 584 A1 (Wal <ol GmbH) ein Verfahren zur Entfernung von Klebstoffresten von einem 1<lebstoffauftragsmittel. Dabei wird eine Reinigungsdispersion auf ein 1<lebstoffauftragsmittel aufgetragen. Im Anschluss wird die Dispersion durch Bewegung des 1<lebstoffauftragsmittels, z.B. einer Auftragswalze, und eines Abstands- und Mengenverteilungsmittels, z.B. einer Rakel, gleichmässig verteilt und es bildet sich ein Klebstoff-Reinigungsmittel-Koagulat. Dieses Koagulat wird im Anschluss vom 1<lebstoffauftragsmittel entfernt, indem eine Änderung der Drehrichtung des 1<lebstoffauftragsmittels erfolgt und das Koagulat dadurch abfällt oder indem das Koagulat abgeschabt wird, z.B. mit einem Spatel. Im Anschluss kann eine Feinreinigung mit Wasser und / oder Tüchern erfolgen. Die Reinigungsmitteldispersion kann Metall- und / oder Halbmetalloxidpartil<el umfassen.

[0005] Currently, experts believe that adhesives based on polyurethane and / or polyacrylates will be of particular interest in the future. However, these adhesives exhibit high levels of stickiness and are difficult to remove from the substrate after the bonding process. <lebstoffträgern, wie z.B. Walzen, entfernen. Die bislang bekannten Reinigungsverfahren haben sich als unbefriedigend herausgestellt. Wasserbasierte Reinigungsverfahren führen zu Waschwasser, das kostenintensiv und aufwendig gereinigt werden muss. Wasserfreie Reinigungsverfahren, wie sie aus dem Stand der Technik bekannt sind, sind aber ebenfalls nachteilig, da sie meist zeitaufwendig sind und / oder die Klebstoffe nicht vollständig entfernen.

[0006] There is therefore still a need for improved solutions that do not have the disadvantages mentioned above or at least have them to a lesser extent. Description of the invention

[0007] The object of the invention is therefore to provide improved solutions for removing adhesive from 1 <lebstoffträgern, insbesondere von 1<Iebstoffauftragswalzen, bereitzustellen. Dabei soll im Besonderen eine möglichst einfache, umweltfreundliche, schnelle und / oder effektive Entfernung ermöglicht werden.

[0008] The solution to this problem is defined by the features of the independent claims. Further aspects of the invention, as well as particularly preferred embodiments, are the subject of the following description and the dependent claims.

[0009] A first aspect of the present invention relates to a method for removing adhesive, in particular aqueous adhesive, from an adhesive carrier, in particular from a 1 <lebstoffauftragswalze, umfassend die Schritte: a) Providing a cleaning agent comprising natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene rubber dispersion, an ethylene-vinyl acetate dispersion, an ethylene-vinyl acetate copolymer dispersion, a polyvinyl acetate dispersion, a polyvinyl acetate copolymer dispersion, an epoxy resin dispersion, a polyamide dispersion, a nitrile-vinyl acetate dispersion and / or a nitrile-vinyl acetate copolymer dispersion, b) Applying the cleaning agent to the adhesive carrier, c) Uniformly distributing the cleaning agent on the adhesive carrier and mixing it with the adhesive to form an adhesive-cleaning agent film, d) Allowing the adhesive-cleaning agent film to dry and e) Peel off the dry adhesive-cleaning agent film from the adhesive carrier.

[0010] The method according to the invention allows even stubborn adhesive to be removed from an adhesive carrier. Specifically, a cleaning agent according to the invention is applied to an adhesive carrier, with adhesive present on the adhesive carrier. This can, for example, be adhesive residues. Adhesive residues are residues of adhesives that have not been completely removed from an adhesive carrier during a specific process and / or application.

[0011] The cleaning agent is applied over the entire length and width, and in special cases also over the entire height, of the 1 <lebstoffträgers aufgetragen, sodass das Reinigungsmittel mit dem gesamten Klebstoff in Kontakt kommen kann. Dadurch kann sich das Reinigungsmittel mit dem Klebstoff zu einem Klebstoff-Reinigungsmittel-Film verbinden bzw. vermischen.

[0012] The cleaning agent is particularly characterized by the fact that it is very easy to spread when applied, but still adheres so well to the adhesive carrier and / or the adhesive that it does not drip off them.

[0013] In the next step, the adhesive-cleaning agent film is dried. This can be done either by air drying or by machine drying, e.g., using a hairdryer.

[0014] After drying, the adhesive-cleaning film is preferably rubbery and / or flexible and can be peeled off the adhesive carrier. Specifically, the film is first lifted at one point, e.g., at an edge, and then the remaining dry film is peeled off.

[0015] It is also possible to make a cut through the adhesive-cleaning agent film to facilitate gripping and removal. This procedure has proven particularly advantageous for adhesive carriers in the form of rollers, as these can have a circumferential adhesive-cleaning agent film. By peeling off the film according to the invention, the entire adhesive can be removed. The adhesive-cleaning agent film can be disposed of after the cleaning process.

[0016] It has been observed that after the addition of natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene rubber dispersion, an ethylene-vinyl acetate dispersion, an ethylene-vinyl acetate copolymer dispersion, a polyvinyl acetate dispersion, a polyvinyl acetate copolymer dispersion, an epoxy resin dispersion, a polyamide dispersion, a nitrile-vinyl acetate dispersion, and / or a nitrile-vinyl acetate copolymer dispersion to an adhesive on an adhesive carrier, an adhesive-cleaning agent film according to the invention forms on the adhesive carrier after a drying time. This film enables efficient cleaning of the adhesive. <Iebstoffträgers ohne Einsatz von Wasser, wodurch ein umweltfreundliches und effektives Verfahren zur Entfernung von Klebstoff bereitgestellt wird. Ausserdem kann der Film ohne weitere Schritte direkt vom Klebstoffträger entfernt werden. Dies ist zeitsparend.Furthermore, the film according to the invention has the advantage that it can be removed manually from the adhesive carrier without soiling. Furthermore, no fine cleaning is required after removing the dry film, since even fine 1 <lebstoffverunreinigungen vom Klebstoffträger entfernt werden.

[0017] The invention thus provides a method for highly efficient adhesive removal. A particular advantage of this method is that the adhesive bonds effortlessly with the cleaning agent, and the resulting adhesive-cleaning agent film can be quickly and easily removed from the adhesive carrier. Furthermore, the method according to the invention simplifies the disposal of the film, as it can be removed directly from the adhesive carrier and disposed of.

[0018] The method according to the invention comprises the removal of a single adhesive at once or the removal of multiple adhesives simultaneously. It is therefore possible for the method to remove a single adhesive or for the method to remove multiple different adhesives simultaneously.

[0019] Aqueous adhesives are adhesives that use water or an aqueous liquid as the mobile phase in which 1 <lebstoffbestandteile als Dispersion vorliegen. Bevorzugterweise handelt es sich bei dem wässrigen Klebstoff um wässrige Polyurethan- und / oder Acrylat-Dispersionsklebstoffe. Das Verfahren eignet sich aber auch zur Entfernung anderer Klebstoffe.

[0020] In this case, an adhesive carrier encompasses all means for applying adhesive, for example, to substrates. The adhesive carrier is preferably an adhesive application roller.

[0021] In particular, the adhesive carrier is a component of a system for bonding substrates, especially foams. Specifically, it is a roller application device in which the application of adhesive, especially dispersion adhesive, to a substrate is carried out using a 1 <lebstoffauftragswalze erfolgt.

[0022] Natural latex is the latex containing rubber from various plants, including the rubber tree (Ficus elastica) and / or the I <autschul<baums (Hevea brasiliensis). In particular, the natural latex according to the invention refers to the rubber-containing latex of the I <autschul<baums (Hevea brasiliensis).

[0023] Preferably, the natural latex of the I <autschul<baums zusammen aus: 50 - 85 wt.%, in particular 60 - 75 wt.%, water, 15 - 45 wt.%, in particular 25 - 35 wt.%, especially 30 wt.%, rubber, 0.5 - 3.5 wt.%, in particular 1.5 - 2.5 wt.%, resins, 0.5 - 3 wt.%, in particular 1.5 - 2 wt.%, proteins and 0.1 - 1.5 wt.%, in particular 0.5 - 1 wt.%, minerals, whereby the percentages by weight relate to the total weight of the natural latex.

[0024] Rubber consists of long polyisoprene chains, which are used to produce particularly elastic materials. In particular, this elastic material is rubber.

[0025] In addition to the rubber found in natural latex, there is also synthetic rubber. Synthetic rubber refers to elastic polymers made from petrochemical raw materials, such as crude oil, and used to manufacture rubber. Examples of synthetic rubber include polychloroprene-I. <autschul<, Styrol-Butadien-I<autschul< (SBR), Ethylen-Vinylacetat und die Copolymere davon (EVA, EVAC), Polyvinylacetat und die Copolymere davon (PVA, PVAC), Epoxidharz (EP), Polyamid (PA) und Nitril-Vinylacetat sowie die Copolymere davon (NVA, NVAC).

[0026] In particular, the polyurethane dispersion is an aqueous dispersion which contains particles of polyurethane polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0027] The polyurethane dispersion preferably has a solids content of 20 - 75 wt. - Y, in particular 25 - 70 wt. - Y, especially 30 - 65 wt. - Y, based on its total weight.

[0028] More preferably, the acrylate dispersion is an aqueous dispersion which contains particles of acrylate polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0029] In particular, the acrylate dispersion has a solids content of 30 - 85 wt. - Y, in particular 35 - 80 wt. - Y, especially 40 - 75 wt. - Y, based on its total weight.

[0030] Preferably, the polychloroprene dispersion is an aqueous dispersion which contains particles of polychloroprene polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0031] In particular, the styrene-butadiene-I <autschul<-Dispersion eine wässrige Dispersion, welche als disperse Phase Partikel aus Styrol-Butadien-I<autschul<-Polymeren in einer wässrigen Flüssigkeit oder Wasser als kontinuierliche Phase enthält.

[0032] The ethylene-vinyl acetate dispersion is particularly preferably an aqueous dispersion which contains particles of ethylene-vinyl acetate polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0033] More preferably, the ethylene-vinyl acetate copolymer dispersion is an aqueous dispersion which contains, as the disperse phase, particles of ethylene-vinyl acetate copolymers in an aqueous liquid or water as the continuous phase.

[0034] In particular, the polyvinyl acetate dispersion is an aqueous dispersion which contains particles of polyvinyl acetate polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0035] Particularly preferably, the polyvinyl acetate copolymer dispersion is an aqueous dispersion which contains particles of polyvinyl acetate copolymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0036] More preferably, the epoxy resin dispersion is an aqueous dispersion which contains particles of epoxy resin polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0037] In a particularly preferred embodiment, the polyamide dispersion is an aqueous dispersion which contains particles of polyamide polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0038] More preferably, the nitrile-vinyl acetate dispersion is an aqueous dispersion which contains particles of nitrile-vinyl acetate polymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0039] More preferably, the nitrile-vinyl acetate copolymer dispersion is an aqueous dispersion which contains particles of nitrile-vinyl acetate copolymers as the disperse phase in an aqueous liquid or water as the continuous phase.

[0040] In particular, the polychloroprene dispersion containing styrene-butadiene-I <autschul<-Dispersion, die Ethylen-Vinylacetat-Dispersion, die Ethylen-Vinylacetat-Copolymer-Dispersion, die Polyvinylacetat-Dispersion, die Polyvinylacetat-Copolymer-Dispersion, die Epoxidharz-Dispersion, die Polyamid-Dispersion, die Nitril-Vinylacetat-Dispersion und / oder die Nitril-Vinylacetat-Copolymer-Dispersion bezogen auf ihr jeweiliges Gesamtgewicht einen Feststoffanteil von 30 - 80 Gew. - Y, insbesondere 35 - 75 Gew. - Y, im Speziellen 40 - 70 Gew. - Y, auf.

[0041] Aqueous dispersions have the advantage of being solvent-free and thus more environmentally friendly than solvent-based dispersions. However, in special embodiments, it is also possible for the polychloroprene dispersion, the polyurethane dispersion, the acrylate dispersion, the styrene-butadiene-I <autschul<-Dispersion, die Ethylen-Vinylacetat-Dispersion, die Ethylen-Vinylacetat-Copolymer-Dispersion, die Polyvinylacetat-Dispersion, die Polyvinylacetat-Copolymer-Dispersion, die Epoxidharz-Dispersion, die Polyamid-Dispersion, die Nitril-Vinylacetat-Dispersion und / oder die Nitril-Vinylacetat-Copolymer-Dispersion lösungsmittelbasierte Dispersionen sind.

[0042] In this context, an adhesive-cleaning agent film or a film refers to a continuous layer. Specifically, this refers to a layer comprising both adhesive and cleaning agent. Furthermore, the adhesive-cleaning agent film according to the invention is preferably rubbery and / or flexible in its dry state, so that it can be easily removed from the adhesive carrier.

[0043] Preferably, the cleaning agent is applied in step b) using a means for controlling the quantity, in particular a dosing device.

[0044] This allows for controlled dispensing of the cleaning agent, specifically to achieve a specific ratio between the cleaning agent and the adhesive. Another advantage is that the application of excessive amounts of cleaning agent can be prevented. This reduces material consumption and is environmentally friendly.

[0045] However, it is also conceivable to apply the cleaning agent to the adhesive carrier manually. For example, the cleaning agent can be measured using measuring devices, especially measuring cups, and then applied manually.

[0046] In a further embodiment, the cleaning agent may additionally contain one or more additives, in particular one or more additives from the group comprising surfactants, preservatives, citrates, emulsifiers, essential oils, wetting agents, and biocides. The proportion of additives is, for example, 0.01-10% by weight, in particular 0.1-5% by weight, based on the total weight of the cleaning agent.

[0047] In a further preferred embodiment, the natural latex, the polychloroprene dispersion, the polyurethane dispersion, the acrylate dispersion, the styrene-butadiene rubber dispersion, the ethylene-vinyl acetate dispersion, the ethylene-vinyl acetate copolymer dispersion, the polyvinyl acetate dispersion, the polyvinyl acetate copolymer dispersion, the epoxy resin dispersion, the polyamide dispersion, the nitrile-vinyl acetate dispersion, and / or the nitrile-vinyl acetate copolymer dispersion is colored with dyes. This helps to verify the homogeneity of the cleaning agent and / or the adhesive-cleaning agent film. A homogeneously mixed cleaning agent and / or a homogeneously mixed adhesive-cleaning agent film supports effective adhesive removal. However, it is also possible to add dyes to the cleaning agent. The dyes can preferably be of animal and / or plant origin.In particular, the dyes do not affect the chemical and / or physical properties of the cleaning agent and / or the adhesive-cleaning agent film.

[0048] In particular, the uniform distribution in step c) is carried out with a distribution <zeug, insbesondere mit einer Rakel und / oder einer Dosierwalze.

[0049] This has the advantage that the cleaning agent can be distributed in a controlled thickness across the adhesive carrier. This results in a uniformly thick adhesive-cleaning film. This facilitates easier removal of the dry adhesive-cleaning film without the film cracking in certain places. <lebstoffträgermaterial kleben bleibt und / oder beim Abziehen vom 1<lebstoffträgermaterial reisst. Das Verteilwerl<zeug kann ein elektronisches Gerät zum automatischen gleichmässigen Verteilen sein. Es ist aber auch möglich, dass das Verteilwerl<zeug von Hand bedient wird. Insbesondere ist es möglich, dass das Verteilwerl<zeug eine elektronische Rakel und / oder eine elektronische Walze ist. Eine weitere Möglichkeit ist, dass das Verteilwerl<zeug eine nicht-elektronische Rakel und / oder eine nicht-elektronische Walze ist, die manuell bzw. von Hand angetrieben wird.

[0050] In particular, the distribution network <zeug um eine Dosierwalze, wobei die Dosierwalze so zum Klebstoffträger platziert ist, dass ein Spalt mit einer Breite zwischen der Dosierwalze und dem Klebstoffträger vorhanden ist, wobei die Breite des Spalts einer Dicke des Klebstoff-Reinigungsmittel-Films entspricht.

[0051] This has the advantage that the adhesive-cleaning agent film can be distributed evenly.

[0052] It is also possible to move the dosing roller away from the adhesive carrier after the cleaning agent has been distributed. This is advantageous because it creates space around the adhesive carrier for later, easily removing the dry adhesive-cleaning film from the adhesive carrier.

[0053] However, it is also conceivable that the distribution in step c) is carried out manually. For example, it is possible for the cleaning agent to be distributed directly onto the adhesive carrier by a person, taking all safety precautions into account, using their hands or gloves.

[0054] Drying in step d) can be done without any additional aids in the atmosphere, e.g., at room temperature. However, it is also possible to use a drying device, e.g., a hairdryer, for the drying process.

[0055] In a particularly preferred embodiment, a drying time in step d) is between 40 and 110 minutes, in particular between 50 and 100 minutes, especially between 60 and 90 minutes.

[0056] The drying time according to the invention allows the adhesive-cleaning agent film to dry optimally, so that it can preferably achieve a rubber-like and / or flexible shape, allowing it to be easily removed from the adhesive carrier without tearing. In particular, the drying time leads to an optimal bond between the adhesive and the cleaning agent, so that with the resulting adhesive-cleaning agent film, all of the adhesive from the 1 <lebstoffträgermaterial entfernt werden kann.

[0057] Depending on the composition of the adhesive, the cleaning agent and / or the thickness of the adhesive-cleaning agent film, it is also possible that the drying time is less than 40 minutes or more than 110 minutes.

[0058] In a particularly preferred embodiment, the removal in step e) is carried out manually.

[0059] Manual removal can reduce the risk of the dry adhesive-cleaner film tearing. The force with which the adhesive-cleaner film is removed from the 1 <Iebstoffträgermaterial abgezogen wird, kann beim manuellen bzw. von Hand erfolgten Abziehen umgehend reguliert werden, z.B. wenn optisch sichtbar ist, dass der Klebstoff-Reinigungsmittel-Film droht zu reissen. Ausserdem ist es vorteilhaft, dass die Richtung und / oder die Geschwindigkeit des Abziehens des Films umgehend angepasst und / oder laufend verändert werden kann. Weiter kann der Film beim manuellen bzw. von Hand erfolgten Abziehen von allen Seiten und / oder Ecken beginnend gegriffen und abgezogen werden. Dies bietet den Vorteil, dass der Prozess des Abziehens an die Dicke, die Beschaffenheit, die Reissfestigkeit und / oder die Platzierung des Klebstoff-Reinigungsmittel-Films angepasst werden kann.

[0060] However, it is also conceivable that the dry adhesive-cleaning agent film is removed mechanically, for example by means of a scraper.

[0061] In a highly preferred embodiment, the adhesive-cleaning agent film after step d) and before step e) has a thickness of 0.1 - 10 mm, in particular 0.5 - 7 mm, particularly preferably 1 - 5 mm.

[0062] The thickness of the dry adhesive-cleaning agent film according to the invention promotes easy removal without the film sticking to the adhesive carrier and / or tearing during removal from the adhesive carrier. A further advantage is that the thickness of the film according to the invention eliminates the need for long drying times.

[0063] Depending on the composition of the adhesive and / or the cleaning agent, it is also possible that the thickness of the adhesive-cleaning agent film has a thickness of less than 0.1 mm, in particular 0.01 - 0.09 mm, or more than 10 mm, in particular 10.1 - 15 mm.

[0064] In a further preferred embodiment, the cleaning agent is applied in an amount such that the weight ratio of cleaning agent to adhesive is between 0.5 and 3.5, preferably between 1 and 3, in particular between 1.5 and 2.5, especially 2.

[0065] The ratio according to the invention allows the cleaning agent to bond optimally with the adhesive, forming an adhesive-cleaning film. This film, when dried, can then contribute to the effective removal of the adhesive from the adhesive carrier.

[0066] Depending on the composition of the adhesive and / or the cleaning agent, it is also possible that the weight ratio between cleaning agent and adhesive is less than 0.5 or greater than 3.5.

[0067] In particular, the cleaning agent has a viscosity of 75 - 3,200 mPa·s, in particular 100 - 3,000 mPa·s, particularly preferably 150 - 2,500 mPa·s, especially 200 - 1,500 mPa·s.

[0068] This gives the cleaning agent an optimal viscosity. Specifically, this means that the cleaning agent is viscous enough to be applied to the adhesive carrier without dripping from the adhesive carrier, while at the same time being fluid enough to be easily applied to the 1 <Iebstoffträgermaterial verteilt werden zu können.

[0069] Depending on the composition of the adhesive and / or the cleaning agent, it is also possible that the cleaning agent has a viscosity of less than 75 mPa s or more than 3,200 mPa s

[0070] The viscosity is preferably measured at 23 °C according to standard M092-ISO 2555:2018 with spindle L2 at 30 revolutions per minute.

[0071] In a particularly preferred embodiment, the natural latex has a solids content of 20 - 80 wt. - Y, in particular 30 - 75 wt. - Y, especially 40 - 70 wt. - Y, based on its total weight.

[0072] The solid content corresponds in particular to the non-volatile content measured according to DIN EN ISO 3251:2019 (1 g / 1 h / 125 °C)

[0073] In particular, the cleaning agent has a solids content of 30 - 90 wt. - Y, in particular 35 - 85 wt. - %, particularly preferably 40 - 80 wt. - Y, in particular 50 - 70 wt. - Y, based on its total weight.

[0074] The aforementioned embodiments with regard to the viscosity of the cleaning agent as well as the solid content of natural latex and the solid content of the cleaning agent have the advantage that they achieve an optimal bond between the cleaning agent and the adhesive and / or an optimal cleaning effect.

[0075] In particular, the acrylate dispersion has a glass transition temperature of at least -30 °C.

[0076] This helps to ensure that the acrylate dispersion has suitable properties during the process, e.g. in terms of viscosity and / or elasticity, so that the adhesive-cleaning agent film does not become too hard but also not too soft after drying.

[0077] In a particularly preferred embodiment, the cleaning agent has a bio-content of at least 50 wt. - Y, preferably at least 60 wt. - Y, in particular at least 70 wt. - Y, especially at least 80 wt. - %, particularly preferably at least 90 wt. - Y, very particularly preferably at least 99 wt. - Y, wherein the bio-content is a proportion of ingredients of non-synthetic origin.

[0078] In particular, the term "organic content" refers to a content that originates from ecologically controlled cultivation, meaning that sustainable raw materials are used to produce the cleaning agent. This enables environmentally friendly provision of the cleaning agent. In particular, a cleaning agent with an organic content of at least 50% by weight, preferably at least 60% by weight, in particular at least 70% by weight, especially at least 80% by weight, particularly preferably at least 90% by weight, and most particularly preferably at least 99% by weight, is based on a cleaning agent comprising natural latex.

[0079] In particular, a cleaning agent with a bio-content of at least 50 wt. - Y, preferably at least 60 wt. - Y, in particular at least 70 wt. - Y, especially at least 80 wt. - %, particularly preferably at least 90 wt. - Y, very particularly preferably at least 99 wt. - Y, is based on a cleaning agent which does not contain a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene-I <autschul<-Dispersion, keine Ethylen-Vinylacetat-Dispersion, keine Ethylen-Vinylacetat-Copolymer-Dispersion, keine Polyvinylacetat-Dispersion, keine Polyvinylacetat-Copolymer-Dispersion, keine Epoxidharz-Dispersion, keine Polyamid-Dispersion, keine Nitril-Vinylacetat-Dispersion und / oder keine Nitril-Vinylacetat-Copolymer-Dispersion umfasst. Weiter ist es möglich, dass das erfindungsgemässe Reinigungsmittel aufgrund des hohen Bioanteils rezyklierbar ist.This is particularly advantageous in the case of expired cleaning products, which therefore do not have to end up in the trash.

[0080] However, it is also conceivable that the cleaning agent has a bio-content that is less than 99% by weight. In a further embodiment, the cleaning agent can also have a bio-content of 50-99% by weight, in particular 60-90% by weight, especially 70-80% by weight.

[0081] A second aspect of the invention relates to the use of natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene-I <autschul<-Dispersion, einer Ethylen-Vinylacetat-Dispersion, einer Ethylen-Vinylacetat-Copolymer-Dispersion, einer Polyvinylacetat-Dispersion, einer Polyvinylacetat-Copolymer-Dispersion, einer Epoxidharz-Dispersion, einer Polyamid-Dispersion, einer Nitril-Vinylacetat-Dispersion und / oder einer Nitril-Vinylacetat-Copolymer-Dispersion als Reinigungsmittel zur Entfernung von Klebstoff, insbesondere von wässrigem Klebstoff, von einem Klebstoffträger, insbesondere von einer Klebstoffauftragswalze.

[0082] Further advantageous embodiments and combinations of features of the invention emerge from the following detailed description and the entirety of the patent claims. Short description of the characters

[0083] The drawings used to explain the embodiment show: Fig. 1a - 1eA schematic illustration of a method according to the invention for removing adhesive from an adhesive carrier using a cleaning agent comprising natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene rubber dispersion, an ethylene-vinyl acetate dispersion, an ethylene-vinyl acetate copolymer dispersion, a polyvinyl acetate dispersion, a polyvinyl acetate copolymer dispersion, an epoxy resin dispersion, a polyamide dispersion, a nitrile-vinyl acetate dispersion and / or a nitrile-vinyl acetate copolymer dispersion.

[0084] In principle, identical parts in the figures are provided with identical reference symbols. Ways to implement the invention

[0085] Fig. 1a - 1eshow a schematic illustration of a process according to the invention for removing adhesive from an adhesive carrier using a cleaning agent RM comprising natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene-I <autschul<-Dispersion, eine Ethylen-Vinylacetat-Dispersion, eine Ethylen-Vinylacetat-Copolymer-Dispersion, eine Polyvinylacetat-Dispersion, eine Polyvinylacetat-Copolymer-Dispersion, eine Epoxidharz-Dispersion, eine Polyamid-Dispersion, eine Nitril-Vinylacetat-Dispersion und / oder eine Nitril-Vinylacetat-Copolymer-Dispersion.

[0086] In Fig. 1aa cleaning agent RM is applied by means of a dosing device 1 onto the top of a 1 <Iebstoffträgers 2 in Form einer Klebstoffauftragswalze aufgetragen, auf dessen Oberseite sich Klebstoff 3, bzw. Klebstoffreste, befindet. Ein Spalt 4 trennt den Klebstoffträger 2 von einer daneben platzierten Dosierwalze 5, die als Verteilwerl<zeug dient. Der Klebstoffträger 2 und die Dosierwalze 5 drehen sich in entgegengesetzte Richtungen. Die Richtungen, in welche sich die Walzen drehen, sind mit gekrümmten Pfeilen unterhalb der jeweiligen Walze dargestellt.

[0087] Fig. 1b shows the adhesive carrier 2 from Fig. 1asurrounded by an adhesive-cleaning agent film 6. The adhesive is applied by the dosing device 1 to the top of the 1 <lebstoffträgers 2 aufgetragene Reinigungsmittel RM hat sich mit dem auf dem Klebstoffträger 2 befindlichen Klebstoff 3 vermischt und ein Klebstoff-Reinigungsmittel-Film 6 erzeugt. Die Dicke des Films 6 wird durch den Spalt 4 zwischen dem Klebstoffträger 2 und der Dosierwalze 5 bestimmt.

[0088] In Fig. 1cthe adhesive-cleaning agent film 6 is partially removed from the surface of the 1 <lebstoffträgers 2 abgezogen, sodass der Klebstoffträger 2 teilweise nicht mehr vom Klebstoff-Reinigungsmittel-Film 6 umgeben ist. Diese Figur zeigt den Prozess des Abziehens des Klebstoff-Reinigungsmittel-Films 6 im Anfangsstadium. Ausserdem hat sich der Spalt 4 zwischen dem Klebstoffträger 2 und der Dosierwalze 5 durch ein Verschieben der Dosierwalze 5 vergrössert, damit der Klebstoff-Reinigungsmittel-Film 6 abgezogen werden kann, ohne, dass die Dosierwalze 5 im Weg steht. Der gestrichelte Pfeil zeigt die Richtung an, in welche die Dosierwalze 5 verschoben wird.

[0089] Fig. 1d shows the Fig. 1c The above-mentioned peeling process is at an advanced stage. The adhesive-cleaning agent film 6 is peeled off approximately halfway from the adhesive carrier 2 and covers approximately half of the upper side of the 1 <lebstoffträgers 2 frei.

[0090] In Fig. 1eThe adhesive carrier 2 is shown after the entire adhesive-cleaning film 6 has been removed. The adhesive-cleaning film 6 is completely removed from the top of the 1 <lebstoffträgers 2 abgezogen und es befindet sich kein Klebstoff 3 mehr am Klebstoffträger 2. Die Dosierwalze 5 wird wieder an ihre ursprüngliche Position zurückverschoben, sodass sich der Spalt 4 wieder auf die Ausgangsposition wie in Fig. 1a shown reduced. The dashed arrow indicates the direction in which the metering roller 5 is moved.

[0091] Fig. 1a - 1e show only possible and not exhaustive embodiments of the invention, whereby their features can be modified, combined with one another and / or omitted as required according to the respective requirements.

[0092] For example, the cleaning agent can be used in Fig. 1acan also be applied manually. Furthermore, it is possible for the adhesive carrier 2 not to be a roller, but rather a flat surface or even a different shape. Alternatively, a doctor blade can be used instead of a metering roller 5.

[0093] It is also possible that the cleaning agent RM is sprayed onto the adhesive carrier 2. In addition, it is conceivable that the adhesive-cleaning agent film 6 is not only applied at one location, as in Fig. 1c shown, can be removed from the adhesive carrier 2, but simultaneously at various points.

Claims

1. A method for removing adhesive, in particular aqueous adhesive, from an adhesive carrier, in particular from an adhesive application roller, comprising the steps: a) Providing a cleaning agent comprising natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene rubber dispersion, an ethylene-vinyl acetate dispersion, an ethylene-vinyl acetate copolymer dispersion, a polyvinyl acetate dispersion, a polyvinyl acetate copolymer dispersion, an epoxy resin dispersion, a polyamide dispersion, a nitrile-vinyl acetate dispersion and / or a nitrile-vinyl acetate copolymer dispersion.b) Applying the cleaning agent to the adhesive carrier, c) Distributing the cleaning agent evenly on the adhesive carrier and mixing it with the adhesive to form an adhesive-cleaning agent film, d) Allowing the adhesive-cleaning agent film to dry, and e) Peeling off the dry adhesive-cleaning agent film from the adhesive carrier.

2. The method according to claim 1, wherein the application of the cleaning agent in step b) is carried out using a means for controlling the quantity, in particular a dosing device.

3. Method according to one of the preceding claims, wherein the uniform distribution in step c) is carried out with a distribution <zeug, insbesondere mit einer Rakel und / oder einer Dosierwalze, erfolgt.

4. Method according to one of the preceding claims, wherein a drying time in step d) is between 40 and 110 minutes, in particular between 50 and 100 minutes, especially between 60 and 90 minutes.

5. Method according to one of the preceding claims, wherein the removal in step e) is carried out manually.

6. Method according to one of the preceding claims, wherein the adhesive-cleaning agent film after step d) and before step e) has a thickness of 0.1 - 10 mm, in particular 0.5 - 7 mm, particularly preferably 1 - 5 mm.

7. Method according to one of the preceding claims, wherein the cleaning agent is applied in an amount such that the weight ratio of cleaning agent to adhesive is between 0.5 and 3.5, preferably between 1 and 3, in particular between 1.5 and 2.5, especially 2.

8. Method according to one of the preceding claims, wherein the cleaning agent has a viscosity of 75 - 3,200 mPa·s, in particular 100 - 3,000 mPa·s, particularly preferably 150 - 2,500 mPa·s, especially 200 - 1,500 mPa·s.

9. Process according to one of the preceding claims, wherein the natural latex has a solids content of 20 - 80 wt. - Y, in particular 30 - 75 wt. - Y, especially 40 - 70 wt. - %, based on its total weight.

10. Process according to one of the preceding claims, wherein the cleaning agent has a solids content of 30-90% by weight, in particular 35-85% by weight, particularly preferably 40-80% by weight, especially 50-70% by weight, based on its total weight.

11. A process according to any one of the preceding claims, wherein the acrylate dispersion has a glass transition temperature of at least -30 °C.

12. The method according to any one of the preceding claims, wherein the cleaning agent has a bio-content of at least 50 wt. - Y, preferably at least 60 wt. - Y, in particular at least 70 wt. - Y, especially at least 80 wt. - %, particularly preferably at least 90 wt. - Y, most particularly preferably at least 99 wt. - Y, wherein the bio-content is a content of ingredients of non-synthetic origin.

13. Use of natural latex, a polychloroprene dispersion, a polyurethane dispersion, an acrylate dispersion, a styrene-butadiene-I <autschul<-Dispersion, einer Ethylen-Vinylacetat-Dispersion, einer Ethylen-Vinylacetat-Copolymer-Dispersion, einer Polyvinylacetat-Dispersion, einer Polyvinylacetat-Copolymer-Dispersion, einer Epoxidharz-Dispersion, einer Polyamid-Dispersion, einer Nitril-Vinylacetat-Dispersion und / oder einer Nitril-Vinylacetat-Copolymer-Dispersion als Reinigungsmittel zur Entfernung von Klebstoff, insbesondere von wässrigem Klebstoff, von einem Klebstoffträger, insbesondere von einer Klebstoffauftragswalze.

Images