Reusable film for the temporary covering of a surface and its use

Abstract

The present invention relates to a multi-layer, reusable film for the temporary covering of a surface, such as a floor and / or a window. The film comprises multiple layers, including an adhesive film layer, provided with an adhesive applied in a discontinuous pattern, preferably in the form of dots. In addition, the film comprises at least one ink layer, provided on the non-adhesive side of the film layer to create a visual effect or decoration on the surface. Furthermore, the film comprises a transparent slip-resistant layer, with the ink layer situated between the film layer and the slip-resistant layer. The film has a minimum thickness of 0.2 mm.

Description

[0001] REUSABLE FILM FOR THE TEMPORARY COVERING OF A SURFACE AND ITS USE

[0002] TECHNICAL FIELD

[0003] The invention relates to a reusable film, such as a sticker, for temporarily covering a surface, such as a floor and / or window.

[0004] STATE OF THE ART

[0005] For promotional purposes, for example during sporting events, temporary printing on the substrate is often used, for example via an adhesive film (such as a sticker). This film covers the surface and can be printed with a design.

[0006] A problem with known temporary surface coverings is that they are often designed for single use, wherein removing the film leaves behind adhesive residue or causes damage to the surface, particularly on sports floors made of wood, plastic or parquet. Furthermore, the adhesive layers often lose their effectiveness after use, making reapplication difficult or even impossible and negating the film's reusability.

[0007] Furthermore, the inks used in existing technologies may not be sufficiently resistant to environmental factors such as moisture, heat or UV radiation, causing the design or logo on the film to fade or smudge. This results in the visual integrity of the film deteriorating over time, which is undesirable for applications where appearance is of paramount importance.

[0008] Many existing systems also lack adequate slip resistance, which can pose a risk on certain surfaces, such as sports floors, where player safety is essential. Films without sufficient slip resistance can lead to dangerous situations, such as slipping.

[0009] The present invention aims to provide a solution to at least some of the aforementioned problems.SUMMARY OF THE INVENTION

[0010] The invention relates to a multi-layer, reusable film for the temporary covering of a surface, such as a floor and / or a window, according to claim 1. The invention offers various advantages over known technologies. The film is reusable and can be easily removed without damaging the substrate, thanks to a discontinuous adhesive layer. Due to the unique position of the ink layer, applied to the adhesive film and situated between the transparent slip-resistant layer, it is resistant to environmental influences, ensuring the design remains intact for a long time, even with repeated use. The transparent slip-resistant layer ensures safe application on sports floors, enabling the film to provide optimal slip resistance. The system offers a cost-effective and sustainable solution for temporary floor coverings, with the possibility of reuse without loss of quality. Preferred embodiments are described in claims 2 to 12

[0011] In further aspects, the present invention relates to a kit according to claims 13-15 and a use of the film according to claims 16-20. Finally, the present invention relates to a method according to claims 21 and 22, for covering a substrate, and a method according to claim 23, for the production of a film.

[0012] DESCRIPTION OF THE FIGURES

[0013] Figure 1 shows a schematic representation of an embodiment of a multi-layer, reusable film.

[0014] Figure 2 shows a possible embodiment of a discontinuous pattern of an adhesive according to the present invention.

[0015] DETAILED DESCRIPTION

[0016] In a first aspect, the invention relates to a multi-layer, reusable film for the temporary covering of a surface, such as a floor and / or a window. The film comprises multiple layers, including an adhesive film layer, provided with an adhesive applied in a discontinuous pattern, preferably in the form of dots. In addition, the film comprises at least one ink layer, provided on the non-adhesive side of the film layer to create a visual effect or decoration on the surface. Furthermore, the film comprises a transparent slip-resistant layer, with the ink layer being situatedbetween the film layer and the slip-resistant layer. In one embodiment, the film has a minimum thickness of 0.2 mm.

[0017] In many sectors, surfaces such as floors are temporarily covered with films, such as stickers, for example at sporting events. Here, temporary floor stickers are often used to display sponsors' logos or markings required for the sport. It is essential that these stickers adhere firmly during the game, but without compromising the safety of the playing surface, for instance by making it slippery. Furthermore, it is desirable that the film or sticker can be removed without leaving adhesive residue or damaging the floor. Moreover, stickers with these properties are often single-use only, which entails a significant economic and environmental burden.

[0018] In one embodiment, the film is attached to the surface using an adhesive film layer, wherein an adhesive is applied in a discontinuous pattern. A discontinuous pattern refers to an interrupted or non-continuous distribution of a material across a surface, in which areas without material alternate with areas containing material, such as an adhesive. In a preferred form, this pattern takes the form of dots, but may also take other forms such as lines, a grid or randomly distributed adhesive zones. Dots refer to discrete shape elements that may be round, square or of another geometric shape.

[0019] The use of a discontinuous adhesive pattern offers several advantages over a continuous adhesive layer. Firstly, it facilitates the removal of the film without leaving adhesive residue on the sports floor, which contributes to the efficient and rapid replacement of the film. Secondly, the reduced contact area of the adhesive makes repositioning easier, which is useful for accurately positioning the film without air bubbles or creases.

[0020] Furthermore, the choice of adhesive pattern influences the film's adhesion properties. A pattern with smaller and more densely spaced adhesive zones can provide a stronger grip, whilst a more widely spaced pattern further facilitates removal. This allows the invention to be adapted to different types of sports floors, such as varnished wooden basketball courts, synthetic sports floors or other smooth surfaces, without the risk of damage.

[0021] Furthermore, the presence of non-adhesive zones contributes to air circulation between the film and the surface, which prevents moisture from accumulatingbeneath the sticker. This not only helps to maintain long-term adhesive stability but also reduces the risk of damage to the floor finish, which is particularly relevant in the case of repeated use.

[0022] In one embodiment, the adhesive on the film layer comprises a polyacrylate, polyurethane or silicone. In a preferred embodiment, the adhesive comprises at least a polyacrylate. Polyacrylate is particularly suitable due to its strong adhesion to various substrates, including smooth sports floors, and its good ageing resistance. Furthermore, polyacrylate offers a balance between adhesive strength and removability, which is important for applications where the film must be applied temporarily and removed without leaving adhesive residue.

[0023] Polyurethane adhesives can offer increased flexibility and toughness, making them suitable for applications where the film is subject to mechanical stress or repeated deformation. This can be advantageous for reusable films that are applied and removed multiple times. In addition, polyurethane adhesives generally exhibit good resistance to moisture and temperature fluctuations, which increases the film's suitability for use in various environments.

[0024] Silicone adhesives offer excellent adhesion to both porous and non-porous surfaces and retain their adhesive strength under extreme conditions, such as high humidity and temperature fluctuations. An additional advantage of silicone is its intrinsic nonstick property in certain combinations, which can aid in the controlled release of the film without damaging the substrate. This can be particularly useful when the film is applied to delicate sports floors with specific finish layers.

[0025] In one embodiment, the film layer is provided with at least one ink layer on the nonadhesive side. This creates a visual effect or decoration on the surface, such as a logo or a field marking. In one embodiment, 1, 2, 3, 4 or more ink layers are provided. These ink layers may cover the entire surface of the film, or the film may be partially printed.

[0026] In one embodiment, the ink layer comprises an ink, which is a UV ink, solvent-based ink, latex-based ink or toner. The choice of ink depends on the application, the desired durability and compatibility with the various layers of the film.Solvent-based ink contains volatile solvents that evaporate during the drying process, ensuring the ink adheres well to various substrates and is resistant to moisture, heat and UV radiation. Latex-based ink is a water-based ink that forms a flexible, durable layer when heated. It offers excellent adhesion and elasticity, and is ideal for reusable stickers that are used multiple times. Toner is a dry powder that is fixed to the substrate by heat and pressure, without any drying time. It produces sharp, high-resolution prints, ideal for detailed designs, and offers increased scratch and wear resistance.

[0027] In a preferred form, the ink layer comprises a UV ink or UV gel ink. This is characterised by rapid curing under the influence of ultraviolet light, making it dry immediately after the printing process. This results in sharp, durable prints with high scratch and wear resistance.

[0028] In one embodiment, the ink layer may comprise transparent or opaque inks. Transparent inks can be used to create subtle colour effects orto work in conjunction with additional film layers, such as a metallic layer that remains visible through the ink. Opaque inks, on the other hand, are suitable for high-contrast, clear prints that must remain legible even with intensive use or under bright light.

[0029] In one embodiment, a transparent slip-resistant layer is applied over the printed film layer. The ink layer is situated between the film layer and the slip-resistant layer. By placing the ink layer between the other layers, it is protected against wear and tear and external influences, such as moisture, dust and mechanical stress caused by footwear or sports equipment. The slip-resistant layer not only contributes to the durability of the visual print, but also improves the safety of athletes by minimising the risk of slipping.

[0030] In one embodiment, a transparent slip-resistant layer is placed over the ink layer. This layer may consist of, but is not limited to, rubber, silicone, polyurethane, acrylic, polyvinyl chloride, ethylene-vinyl acetate (EVA), thermoplastic elastomer (TPE), polyamide, polypropylene, polyethylene, glass fibre, ceramic particles, aluminium oxide, silica, corundum, limestone, sand-lime brick, resins, thermoplastic polyolefins, polyurethane rubber, resin or rubber composites, polyvinyl butyral (PVB), and injection-moulded rubber. In a preferred form, the slip-resistant layer comprises one or more polymers; more preferably, the slip-resistant layer comprises PVC.In one embodiment, the slip-resistant layer has a linear slip resistance of between 80 and 110, preferably between 85 and 105, measured in accordance with EN 13036. The slip resistance indicates the extent to which the layer resists slipping, which is necessary for applications on sports floors where safety plays a key role. A slip resistance within this range ensures that the film provides sufficient grip without the floor feeling too rough or uncomfortable for users.

[0031] In one embodiment, the slip-resistant layer has a surface weight of between 100 and 150 g / m2, preferably between 100 and 140 g / m2, more preferably between 110 and 140 g / m2, even more preferably between 120 and 140 g / m2, most preferably between 130 and 140 g / m2. This surface weight influences the durability and slip resistance of the reusable film. A surface weight within this range provides sufficient material density to offer effective grip without the layer feeling too heavy or uncomfortable for the user.

[0032] The correct surface weight is important for achieving the desired slip resistance and ensuring the long service life of the film, particularly in high-traffic environments such as sports floors. A slip-resistant layer that is too light may provide insufficient grip, whilst a layer that is too heavy can lead to increased wear of the film or a less flexible application, which may be impractical for repeated use or for removing and reapplying the film.

[0033] The surface weight of the slip-resistant layer can also help improve the film's stability, ensuring it adheres firmly to the underlying surface and does not shift during use. This contributes to the film's overall safety and functionality, which is important in applications such as sporting events where precision and safety are essential. Optimising this surface weight therefore helps to achieve the right balance between grip, durability and user comfort.

[0034] In one embodiment, the slip-resistant layer has a thickness of between 80 and 200 pm, more preferably between 85 and 190 pm, and even more preferably between 85 and 185 pm, for example 86 or 185 pm. This thickness contributes to the optimal balance between grip, durability and flexibility. The thickness ensures that the layer contains sufficient material to provide effective slip resistance without the film becoming too stiff or too heavy. Furthermore, a thickness within this range prevents the slip-resistant layer from wearing away too quickly with repeated use, which isessential for applications on sports floors where there is intensive wear caused by movement and footwear.

[0035] A slip-resistant layer that is too thin might offer insufficient protection, causing the film to wear out more quickly and be less effective at preventing slips. Conversely, a layer that is too thick could reduce the film's flexibility and reusability, making removal and reapplication more difficult. By maintaining a thickness between 80 and 200 pm, the film remains easy to handle and suitable for multiple applications without significant loss of quality.

[0036] In addition, the thickness of the slip-resistant layer also affects the transparency and aesthetics of the film. A consistently thin yet effective layer helps to keep the underlying ink layer clearly visible, which is particularly important for printed stickers featuring logos or markings for sporting events. At the same time, the thickness contributes to the film's strength and resistance to scratches and wear, ensuring it retains its functionality even with intensive use.

[0037] The film has a minimum thickness of 0.2 mm to ensure sufficient layers, including the adhesive layer, the ink layer and the slip-resistant layer. In one embodiment, the reusable film has a total thickness of between 0.2 and 1 mm, more preferably between 0.25 and 1 mm, even more preferably between 0.25 and 0.9 mm, more preferably between 0.3 and 0.8 mm, even more preferably between 0.3 and 0.7 mm, even more preferably between 0.3 and 0.6 mm, and most preferably between 0.3 and 0.5 mm.

[0038] In addition, the total thickness of the film must remain within certain limits to be suitable for specific purposes, such as use on sports pitches. Stickers with a thickness exceeding 1 mm can act as an obstacle on the playing surface, which can affect both the playing experience and the safety of the athletes. Thick stickers, for example, can cause hindrance during rapid movements or ball contact, making them unsuitable for professional use on sports floors.

[0039] In one embodiment, the film is provided with a removable backing layer, which is preferably paper, and more preferably paper coated with a silicone layer. The removable backing layer protects the adhesive film layer during storage and transport, preventing the film from adhering unduly to itself or other surfaces before it is applied. The choice of paper as the material offers several advantages. Paper islight, relatively inexpensive and easy to process, making it an efficient solution for large-scale production and distribution.

[0040] In a preferred form, the paper is provided with a silicone layer. The silicone coating reduces the adhesion between the backing layer and the adhesive film layer, allowing the backing layer to be removed effortlessly without leaving any adhesive residue or damaging the film. This is particularly relevant for stickers with a discontinuous adhesive pattern, as it prevents certain parts of the backing layer from adhering more strongly than others, which could otherwise lead to uneven removal and possible deformation of the film.

[0041] In addition, the backing layer may contain specific cut lines or perforations, depending on the desired application. In one embodiment, the backing layer is provided with a central split line, so that users can remove it more easily by peeling the layer away on both sides of the split line.

[0042] Furthermore, the removable backing layer may be printed with instructions or guidelines for the correct application of the sticker. This is particularly useful in sports environments, where the correct positioning of sponsor logos or markings is essential for a professional appearance and functional layout of the playing field. The printing may consist of visual markings, such as alignment aids, or textual instructions for the user.

[0043] In one embodiment, one or more additional film layers may be provided between the adhesive film layer and the slip-resistant layer. These may be fluorescent, lenticular and / or metallic. An example of such layers is used, among other things, in car wrapping. In one embodiment, these additional film layers may be provided with one or more ink layers, either partially or completely. These additional film layers may have different properties to improve the visual impact and functional properties of the film.

[0044] A fluorescent film layer can be applied to increase the visibility of the sticker, for example in low-light environments or when used under blacklight. This is useful at sporting events in arenas with varying lighting conditions or in applications where a strong visual signal is desired, such as for special promotional campaigns or safety markings on the playing field. In one embodiment, the fluorescent layer is formulated with pigments that glow under UV light, which can, for example,contribute to spectacular visual effects during night-time events or sports matches with special lighting.

[0045] A lenticular film layer makes it possible to create optical effects, such as a 3D display, moving images or changing colours depending on the viewing angle. This type of layer can, for example, be used to generate dynamic sponsor displays that change depending on the viewer's position or camera angle, thereby increasing the impact of advertising. In one embodiment, a lenticular layer can display a changing image depending on the viewing direction, for example an alternating display of two different sponsor logos or an animation effect when moving across the playing field.

[0046] A metallic film layer can be used to give the film a glossy or reflective effect. This may, for example, be desirable for premium marketing applications or special editions of sponsor logos at major sporting events. In one embodiment, a metallic layer may serve as a background for graphic elements, making them stand out more. In another embodiment, the metallic layer is applied selectively, for example in the form of a partial film coating or pattern, so that certain parts of the sticker acquire a metallic sheen whilst other parts retain a matt finish.

[0047] In one embodiment, these additional film layers may be provided with one or more ink layers, whether partial or not. This offers additional possibilities for combining colours, patterns or graphic effects with the specific optical properties of the film layers. A partial ink layer can, for example, be applied to a lenticular layer to accentuate specific parts of the image, or to a metallic layer to create contrasts between reflective and non-reflective parts.

[0048] Adding one or more additional film layers between the adhesive film layer and the slip-resistant layer increases the versatility of the film. Depending on the configuration, the film can offer both functional benefits, such as increased visibility and durability, and aesthetic and marketing benefits through advanced visual effects and luxurious finishes. This makes the invention particularly suitable for use at sporting events and in promotional applications where both safety and visual impact are of great importance.

[0049] In one embodiment, the film is used to cover a substrate such as a sports floor, wherein the substrate is selected from, but not limited to, polyvinyl chloride, plywood, parquet with an optional lacquer layer, concrete, ceramic tiles, epoxyfloors, linoleum, rubber flooring, laminate, natural stone, marble, granite, terrazzo, wood composite, MDF, HDF, steel, aluminium, glass, polycarbonate, acrylic, polyester, polypropylene, polyethylene, cork, vinyl tiles, polyurethane-based sports floor coatings, poured floors, asphalt, brick, or combinations thereof. Preferably, the substrate comprises polyvinyl chloride, plywood and / or parquet, optionally with a lacquer layer.

[0050] The wide choice of substrates makes the film suitable for a variety of sports environments, from professional basketball courts with a high-quality wooden finish to multi-purpose gyms with synthetic floors, for example. Furthermore, the film can also be applied to floors with specific finish layers, such as polyurethane-based sports floor coatings, which are often used to improve shock absorption and grip. Adhesion to these substrates is partly determined by the choice of adhesive and the structure of the adhesive pattern.

[0051] In applications where the substrate has a hard and smooth finish, such as polished concrete or epoxy, the film offers a temporary decorative solution without leaving permanent marks. Conversely, the film can also be used on slightly porous or flexible substrates, such as linoleum or rubber flooring, provided that sufficient adhesion is maintained and removability is guaranteed.

[0052] In one embodiment, the film has an adhesive strength of between 2 and 20 N / 25 mm, more preferably between 2 and 15 N / 25 mm, such as 2.5 N / 25 mm on first use and on subsequent uses. The adhesive strength is measured in accordance with FTM 1.

[0053] The adhesive strength within this range ensures that the film adheres firmly enough to the substrate without coming loose unintentionally during use, whilst at the same time allowing it to be easily removed without leaving adhesive residue or damaging the substrate. This is particularly relevant for use on sports floors, where it is important that temporary markings or sponsor logos can be replaced effortlessly without additional cleaning or repair work.

[0054] Furthermore, the film retains its reusable nature because the adhesive strength remains within the same range upon reuse. This means that the film can be reapplied multiple times without a significant loss of adhesion. This is an advantageover conventional self-adhesive films, which often perform less well after removal or are disposable.

[0055] In a second aspect, the present invention relates to a kit comprising a multi-layer, reusable film as described above according to one of the embodiments. The film is suitable for temporary application on various surfaces, such as sports floors, where an adhesive film layer with a discontinuous adhesive pattern ensures balanced adhesion and easy removability. The film comprises at least one ink layer for visual display and a transparent slip-resistant layer to maintain grip and durability. Optionally, additional layers, such as fluorescent or metallic films, may be added. Thanks to its reusable properties and controlled adhesive strength, the film remains suitable for multiple applications without leaving adhesive residue or damaging the surface.

[0056] Furthermore, the kit comprises one or more carriers, suitable for the temporary storage of the film after initial or subsequent use. The carrier is designed such that the film can be reapplied after removal without a significant reduction in adhesive strength or damage to the layer structure.

[0057] In a preferred form, the carrier is reusable and may be provided with markings or instructions to facilitate the correct positioning and storage of the film. The combination of the film and a suitable carrier extends the film's service life and preserves the quality of the print, the adhesive and the slip-resistant layer, even after multiple applications.

[0058] In one embodiment, the carrier is a plastic plate, suitable for receiving at least part of the film. The plastic plate provides a sturdy and flat surface, allowing the film to be stored safely without creasing, wrinkling or warping, which is particularly important for larger films that require precision when reused.

[0059] In a preferred embodiment, the plastic plate is made from a material with low surface tension, such as polypropylene, polyethylene or polystyrene, so that the film can be easily removed and reapplied without the adhesive sticking undesirably to the carrier. In a further embodiment, the plastic plate is provided with a coating, for example a silicone or fluoropolymer coating, to further optimise storage and reusability.To enhance ease of use, the plastic plate may be provided with orientation markings or a slight embossed pattern to facilitate the positioning of the film. In a further embodiment, the plate has an optimised thickness and flexibility, so that it can serve both as a flat storage carrier and can be easily rolled up or stacked for transport and storage. This ensures the durability of the film and keeps it in optimal condition for repeated use on sports floors or other surfaces.

[0060] In one embodiment, the plastic plate has a flexural modulus of between 1000 and 1300 MPa, more preferably between 1100 and 1300 MPa, and even more preferably between 1200 and 1300 MPa, measured in accordance with ISO 178. This flexural modulus ensures that the plate provides sufficient rigidity to keep the film flat and crease-free, whilst at the same time retaining a certain degree of flexibility for easy handling and storage.

[0061] In a preferred form, the plastic plate is manufactured from materials such as polypropylene, polycarbonate or acrylic, which offer a good balance between stiffness and flexibility, depending on the specific application requirements. In a further embodiment, the plate may have a laminated structure, for example with a foam core or a fibre-reinforced structure, to provide additional dimensional stability without adding excessive weight. Thanks to these properties, the plastic plate can be used efficiently for the temporary storage and transport of the film, without compromising the adhesive properties or the structural integrity of the various layers.

[0062] Depending on the dimensions of the film, some films may require multiple carriers to support the entire surface. This may be the case, for example, with larger films used over a wide area or films with a specific shape that are difficult to fit entirely onto a single carrier. Conversely, smaller films or films of limited dimensions may require only a single carrier, in which case the film can be placed in its entirety on the carrier without the need for additional support.

[0063] In a third aspect, the invention relates to a use of a film as described above. Specifically, it relates to a use for temporarily covering a surface, such as a floor and / or a window, wherein the film can be applied to various types of surfaces. These surfaces include, but are not limited to, polyvinyl chloride (PVC), plywood, parquet, concrete, ceramic tiles, linoleum, rubber, laminate, natural stone, marble, granite, terrazzo, and / or wood composite.In addition, the film can also be effectively applied to glass surfaces such as windows or doors, where the film can be used temporarily to create visual effects, advertising, or decorations. The film may also be suitable for use on metal surfaces, such as stainless steel or anodised aluminium, which require specific adhesion to ensure the film remains firmly in place without causing damage upon removal.

[0064] In applications where the film is used on painted surfaces, it offers the possibility of applying temporary markings, decorations or protective layers without damaging the paintwork or leaving paint residue. This makes the film particularly suitable for use in commercial and industrial environments, where temporary coverings are required without permanent changes to the surface.

[0065] Furthermore, the film can be applied to glass and other transparent surfaces to provide temporary sun protection, privacy screening or visual communication, whilst maintaining optical clarity and without damaging the surface. The film's versatility makes it suitable for a wide range of applications, from temporary floor coverings during events to temporary decorations on windows and other surfaces in shops, sports halls, exhibition spaces or on construction sites. In a preferred embodiment, the surface is a substrate, for example a sports floor such as a basketball court.

[0066] In one embodiment, the substrate comprises polyvinyl chloride, plywood, parquet (optionally with a lacquer layer), concrete, ceramic tiles, epoxy floors, linoleum, rubber flooring, laminate, natural stone, marble, granite, terrazzo, wood composite, MDF, HDF, steel, aluminium, glass, polycarbonate, acrylic, polyester, polypropylene, polyethylene, cork, vinyl tiles, PU-based sports floor coatings, poured floors, asphalt, brick, or combinations thereof. In a preferred embodiment, the substrate comprises polyvinyl chloride, plywood and / or parquet with an optional lacquer layer.

[0067] The wide choice of substrates makes the film suitable for a variety of sports environments, from professional basketball courts with a high-quality wooden finish to multi-purpose gyms with synthetic floors, for example.

[0068] In one embodiment, the film is removed from the surface after use and affixed to one or more carriers for temporary storage. The process of removal and reuse is designed to protect both the film and the underlying surface from damage. When removing the film, the adhesive layer does not adhere permanently to the substrate,making it possible to reapply the film without leaving adhesive residue or damaging the surface.

[0069] After removal, the film is carefully applied to the carrier, which is designed to store the film in a flat and orderly manner. The carrier can hold multiple layers of film, depending on the size and application, and features a surface that prevents the film from becoming distorted, creased or damaged during storage.

[0070] The use of the carrier extends the film's service life by protecting it from environmental factors such as dust, moisture or other contaminants. Furthermore, the film is made easily accessible for reuse, ensuring it remains cost-effective and environmentally friendly, even after multiple applications.

[0071] In one embodiment, the film is reused by removing it from the surface after use and securing it to a carrier for temporary storage. The film is stored in a flat and orderly manner so that it does not sustain damage or become deformed, and is ready for reapplication at a later date. This process ensures long-term use of the film, reduces costs and makes it an environmentally friendly solution by enabling reuse without loss of quality.

[0072] In a fourth aspect, the present invention relates to a method for temporarily covering a surface, such as a substrate, wherein the substrate is covered with a multi-layer, reusable film as described above. The film is applied to a surface, such as a floor or window, and provides temporary coverage, for example for marking areas during sporting events or for applying temporary decorations. After use, the film can be easily removed without damaging the surface, thanks to the adhesive pattern that ensures controlled adhesion.

[0073] In one embodiment, the film can be removed after use and temporarily stored on one or more carriers for later reuse. These carriers may, for example, be plastic plates, which protect the film from contamination or damage during storage. The use of such carriers makes it possible to use the film multiple times without compromising the performance or aesthetic quality of the ink and slip-resistant layer. This not only provides a cost-effective solution but also contributes to the film's sustainability, as the material can be reused without any loss of functionality. The method therefore offers an efficient and reusable solution for temporary floor covering or marking applications.In a fifth aspect, the present invention relates to a method for producing a multilayer, reusable film for the temporary covering of a surface. The method comprises the step of printing an adhesive film layer with at least one layer of ink, preferably at a temperature between 20 and 30 °C, more preferably between 20 and 27 °C, even more preferably between 20 and 25 °C, and most preferably at room temperature. In this context, the film layer on the side opposite the ink layer is provided with an adhesive, applied in a discontinuous pattern, preferably in the form of dots.

[0074] In one embodiment, the method comprises printing with more than one layer of ink, for example two, three, four or more layers of ink. Each layer may in itself cover the entire surface of the film, or each layer may provide a partial print, wherein certain layers may or may not partially overlap.

[0075] In one embodiment, the film is produced with an adhesive film layer on the side opposite the ink layer, wherein an adhesive is applied in a discontinuous pattern. In a preferred form, this pattern takes the form of dots, but may also take other forms such as lines, a grid or randomly distributed adhesive zones.

[0076] The use of a discontinuous adhesive pattern offers several advantages over a continuous adhesive layer. Firstly, it facilitates the removal of the film without leaving adhesive residue on the sports floor, which contributes to the efficient and rapid replacement of the film. Secondly, the reduced contact area of the adhesive makes repositioning easier, which is useful for accurately positioning the film without air bubbles or creases.

[0077] In one embodiment, no drying step is required. Depending on the choice of ink, an optional drying step may be provided. In one embodiment, the method comprises drying the ink for up to 48 hours, for example 10 to 48 hours, more preferably 15 to 40 hours, even more preferably 20 to 36 hours, even more preferably 24 to 36 hours, and most preferably 24 to 30 hours. The drying time depends on the type of ink and the ambient conditions. During this period, the ink ensures that it adheres fully and cures, so that the design remains firmly on the film and does not smudge or cause stains. The drying process can take place at room temperature or in a controlled environment that regulates humidity and temperature.In some applications, the drying time can be eliminated entirely, for example when the ink is dry straight from the printer. This is made possible by the use of UV inks or toner, which cure immediately upon exposure to UV light or through thermal fixation. These inks offer the advantage of faster production, requiring no additional waiting time for drying, whilst simultaneously ensuring resistance to smudging or fading, which increases the efficiency of the process.

[0078] Furthermore, in one embodiment, the method involves applying a transparent slipresistant layer over the printed film layer, with the ink situated between the film layer and the slip-resistant layer. This layer structure provides both protection for the ink and increased slip resistance for the film when applied to a surface. The transparent slip-resistant layer ensures that the film can be used safely on floors and other surfaces without the risk of slipping, whilst the printed ink layer remains fully visible.

[0079] In this version, the film has a minimum thickness of 0.2 mm, which ensures sufficient strength and durability without the film becoming too thick or unwieldy for use. This thickness makes the film flexible enough to adapt to different types of surfaces, whilst offering sufficient protection against wear and tear.

[0080] Optionally, the film can be further fitted with a removable backing layer, for example made of paper or a silicone-coated material, which protects the film before it is applied to the surface. This backing layer ensures that the film can be easily handled and stored without the adhesive layer coming into contact with other surfaces, which extends the film's lifespan. When the film is applied, the backing layer is simply removed, after which the film can be affixed directly to the desired substrate.

[0081] In what follows, the invention is described by means of non-limiting examples which illustrate the invention, and which are not intended or should not be interpreted as limiting the scope of the invention.

[0082] DESCRIPTION OF THE FIGURES AND EXAMPLES

[0083] Figure 1 shows a schematic (not to scale) representation of an embodiment of a multi-layer, reusable film, such as a sticker for a basketball court. The film comprises 3 layers: a slip-resistant layer (1), an ink layer (2) and an adhesive film layer (3). The film has a total thickness of 0.35 mm.The transparent slip-resistant layer (1) is located on the top of the film and ensures a safe and non-slip application on the surface. The slip-resistant layer comprises PVC and has a linear slip resistance of 96, measured in accordance with EN 13036. This layer provides the necessary grip, which is particularly important for floor applications, such as at sporting events, where safety is a key factor. The slipresistant layer has a thickness of 0.180 mm and comprises a polymer, such as polyvinyl chloride, and is designed to provide long-lasting performance, even under harsh conditions.

[0084] The ink layer (2) is located between the slip-resistant layer and the adhesive film layer. This layer is responsible for the visual effects, such as logos, field markings or other decorative elements printed on the film. In this embodiment, the ink layer comprises an ink based on a UV gel.

[0085] The adhesive film layer (3) is located on the underside of the film and is coated with an adhesive in a discontinuous pattern in the form of dots. This ensures that the film adheres firmly to the surface, whilst at the same time allowing it to be easily removed without causing damage to the substrate. The adhesive layer is designed for repeated use and retains its effectiveness even after the film has been applied and removed several times. The adhesive layer comprises polyacrylate as the adhesive.

[0086] The three layers work together to create a film that is not only safe and aesthetically pleasing, but also easy to use, reusable and durable. The film's construction makes it possible to apply temporary markings or coverings without compromising on quality or functionality, and offers an efficient solution for various applications, from sports floors to commercial and industrial environments.

[0087] Optionally, a removable backing layer, preferably paper, and even more preferably paper coated with a silicone layer, may be placed on the underside, beneath the adhesive film layer (3). The removable backing layer protects the adhesive film layer during storage and transport, ensuring that the film does not adhere unduly to itself or other surfaces before it is applied.

[0088] Figure 2 shows a possible embodiment of a discontinuous pattern of an adhesive according to the present invention. The pattern consists of a grid of dots, which areevenly distributed across the surface of the adhesive film layer. This discontinuous pattern ensures that the film adheres well to the surface without making full contact, which promotes both the adhesion and the removability of the film.

[0089] Example 1

[0090] An experiment was conducted to compare the performance of a multi-layer, reusable film according to an embodiment as described above with a film without a slip-resistant layer. Both films were applied to a standard PVC sports floor and subjected to repeated use and mechanical stress.

[0091] A multi-layer film of the type shown in Figure 1, comprising a slip-resistant layer, an ink layer and an adhesive film layer with a discontinuous adhesive pattern, was compared with a film having the same ink and adhesive film layers, but without a slip-resistant layer.

[0092] Both films were applied to the sports floor and subjected to a standardised load of 1,000 footsteps, simulated by a mechanical test rig with rubber shoe soles. The films were then removed and reapplied three times to test their reusability.

[0093] After the mechanical load, the film according to the present embodiment showed no visible wear on the ink layer and retained its adhesive properties after repeated use. The film remained stable on the substrate without shifting or curling. In contrast, the film without a slip-resistant layer showed clear wear on the ink layer, with fading and flaking occurring due to direct exposure to mechanical loading. Furthermore, this film shifted repeatedly during the test, resulting in uneven adhesion and creasing. After three reuses, the adhesive strength of Comparative Film B had noticeably decreased, causing the film to adhere less effectively to the substrate.

[0094] The experiment demonstrates that the integration of a slip-resistant layer in the present invention not only increases the durability of the ink layer but also improves the stability and reusability of the film. This confirms that a slip-resistant layer is essential for applications where temporary markings must be used repeatedly without loss of visual quality or functional performance.

Claims

CLAIMS1. A multi-layer, reusable film for the temporary covering of a surface, such as a floor and / or window, wherein the film comprises:an adhesive film layer provided with an adhesive, wherein the adhesive is applied in a discontinuous pattern, preferably in the form of dots, at least one ink layer provided on the non-adhesive side of the film layer for creating a visual effect or decoration on the surface,- a transparent slip-resistant layer, wherein the ink layer is situated between the film layer and the slip-resistant layer, and wherein the film has a minimum thickness of 0.2 mm.

2. The multi-layer, reusable film according to claim 1, characterised in that the film has a thickness of between 0.2 and 1 mm.

3. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the film is provided with a removable backing layer, wherein the removable backing layer is preferably paper, more preferably paper coated with a silicone layer.

4. The multi-layer, reusable film according to any one of the preceding claims, characterised in that one or more additional film layers are provided between the adhesive film layer and the slip-resistant layer, wherein the one or more additional film layers are fluorescent, lenticular and / or metallic, and wherein, optionally, one or more ink layers are provided on these additional film layers.

5. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the ink layer comprises an ink which is a UV ink, a solvent-based ink, a latex-based ink or a toner.

6. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the transparent slip-resistant layer has a linear slip resistance of between 80 and 110, measured in accordance with EN 13036.

7. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the transparent slip-resistant layer comprises polyvinyl chloride, wherein the transparent slip-resistant layer preferably has a surface weight of between 100 and 150 g / m2.

8. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the slip-resistant layer has a thickness of between 80 and 200 pm.

9. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the adhesive comprises a polyacrylate, polyurethane or silicone, preferably a polyacrylate.

10. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the film is used for covering a substrate such as a sports floor, wherein the substrate comprises polyvinyl chloride, plywood and / or parquet, optionally with a lacquer layer.

11. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the film comprises an adhesive strength of between 2 and 20 N / 25 mm upon first use, measured in accordance with FTM 1.

12. The multi-layer, reusable film according to any one of the preceding claims, characterised in that the film comprises an adhesive strength of between 2 and 20 N / 25 mm upon use following the first use, measured in accordance with FTM 1.

13. A kit comprising a reusable film according to any one of the preceding claims 1-12 and one or more carriers, suitable for the temporary storage of the film after initial or subsequent use.

14. The kit according to claim 13, characterised in that the carrier is a plastic plate suitable for receiving at least a portion of the film.

15. The kit according to any one of the preceding claims 13-14, characterised in that the plastic plate has a flexural modulus of between 1000 and 1300 MPa, measured in accordance with ISO 178.

16. A use of a film according to any one of claims 1 to 12, for temporarily covering a surface, such as a floor or window.

17. The use according to claim 16, characterised in that the surface is a substrate, for example a sports floor such as a basketball court.

18. The use according to any one of claims 16-17, characterised in that the substrate comprises polyvinyl chloride, plywood and / or parquet, optionally with a lacquer layer.

19. The use according to any one of claims 16-18, characterised in that, after use, the film is removed and affixed to one or more carriers for temporary storage of the film.

20. The use according to any one of the claims 16-19, characterised in that the film is reused.

21. A method for temporarily covering a surface such as a substrate, wherein the substrate is covered with a multi-layer, reusable film according to any one of claims 1-12.

22. The method according to claim 21, wherein the film can be removed after use and temporarily stored on one or more carriers for later reuse.

23. A method for producing a multi-layer, reusable film for the temporary covering of a surface, comprising the following steps:- printing an adhesive film layer with at least one layer of ink, and at a temperature between 20 and 30°C, wherein the film layer on the side opposite the ink layer is provided with an adhesive, applied in a discontinuous pattern, preferably in the form of dots;- attaching a transparent slip-resistant layer over the printed film layer, wherein the ink is situated between the film layer and the slip-resistant layer, and wherein the film has a minimum thickness of 0.2 mm; and optionally providing a removable backing layer.

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