Multilayer device with water-activatable self-adhesive film

Abstract

The invention relates to a multilayer device comprising at least three layers, a first "base layer" (A), a second "release layer" (B) on the "base layer" (A), a third "water-activatable base coating" (C) which can be activated with water without the use of any co-solvent, optionally with an additional layer on the "water-activatable base coating" (C), wherein the combination of layer (A) and layer (B) forms a release liner [(A) (B)], the combined layer (C) and optionally coated additional layer forming a 15 GSM to 300 GSM film [(C) (additional layer)]. The membrane can be separated from the release liner [(A) (B)]. Layer (C) comprises hydrophilic and hydrophobic polymers, wherein the ratio of hydrophilic and hydrophobic polymers ranges from 1: 0 to 1: 10. The film is water-activatable, printable, and colorable, transferable, and self-adhesive on any surface.

Description

Technical field:

[0001] The present invention relates to a multilayer device comprising a water-activatable self-adhesive film that can be transferred to different substrates without the use of solvents and without extensive pre-treatment of the surface as is required by conventional spray coating. Background technology:

[0002] Conventional spray applications require extensive handling and processing of the surface being sprayed, including long drying times before further processing. In addition, some liquid coatings contain 35ml to 100ml of volatile organic compounds (VOCs) per liter, which are harmful to health and the environment. In some cases, the lingering smell of newly sprayed surfaces can cause allergic reactions and unpleasantness.

[0003] US6,277,229B1 discloses a method of first printing an image onto an image transfer sheet, which in sequence comprises a water-permeable detackifying layer, a water-absorbing layer, a water-activatable adhesive layer, a water-impermeable layer and a flexible substrate, and then transferring the image onto a substrate without heating. The water-permeable detackifying layer comprises three water-soluble components, including polyacrylic acid (PAA), polyvinyl alcohol (PVOH) and starch. The problem with a film made entirely of PVOH is that the film may be transferred as a whole during the image transfer process. In US6,277,229B1, in order to overcome this deficiency, water-soluble starch is added to the PVOH layer to increase the brittleness of the layer. The image is printed on the image transfer sheet with liquid ink, thereby activating the adhesive in the area where the ink is printed, wherein the adhesive can be activated to a viscous state without heating. The sheet is applied to a substrate to attach the image to the substrate. After the sheet is applied to the substrate, the sheet is pulled away from the substrate, leaving the portion of the adhesive bearing the image attached to the substrate and the portion of the adhesive bearing no image attached to the sheet.

[0004] It is worth noting that in US6,277,229B1, multiple layers are necessary to print and transfer images on a substrate, including a water-permeable release layer, a water-absorbing layer, a water-activatable adhesive layer, a water-impermeable layer, and a flexible backing. Obviously, multiple sets of layers are required to print and transfer images to a substrate.

[0005] Earlier, there have been many attempts to provide a multilayer device comprising a water-activatable self-adhesive film that can be transferred to different substrates without the use of solvents and extensive pre-processing of the surface. The adhesive layers disclosed in the prior art necessarily require one or more solvents in combination with water for activation. Activating adhesive layers using only water without the use of any co-solvents remains an unmet need.

[0006] There is an unmet need to provide a multilayer device including a printable water-activatable self-adhesive film that can be transferred to any surface, avoiding the use of solvents and extensive surface pre-treatment, greatly reducing spraying time, and avoiding the discomfort caused by lingering paint odor. As mentioned above, there is still an unmet need to activate the self-adhesive film using only water without using any co-solvents.

[0007] Purpose of the Invention :

[0008] The main object of the present invention is to provide a multilayer device comprising a water-activatable self-adhesive film which is activated only with water, does not require the use of any co-solvents, is environmentally friendly, PVC-free, VOC-free, can be transferred to any surface, avoids the use of solvents and extensive surface preparation, greatly shortens the spraying time, and avoids the problems associated with lingering paint odors.

[0009] It is another object of the present invention to provide said multilayer device comprising a pigmented film.

[0010] Another object of the present invention is to have the multilayer device comprise a film that can be transferred to a metallic or non-metallic substrate regardless of the surface topography and texture of the substrate.

[0011] Another object of the present invention is to enable the film to be printed using different printing inks and printing methods.

[0012] Another object is to make the film comply with the EN-71 part 3 standard.

[0013] Another object of the present invention is to enable rapid transfer of the film to a surface, thereby significantly reducing the surface coating time compared to conventional spraying processes.

[0014] Another object of the present invention is to make the membrane washable and water-resistant.

[0015] Another object of the present invention is to make the film tamper-resistant.

[0016] Another object of the present invention is to make the film wear-resistant.

[0017] Another object of the present invention is to enable the multilayer device to be produced on a cost-effective commercial scale and used for surface protection and decoration.

[0018] Another object of the present invention is to make the multi-layer device easily accessible to the public as a do-it-yourself (DIY) product. SUMMARY OF THE INVENTION :

[0020] The multilayer device of the present invention comprises at least three layers, a first "base layer" (A), a second "release layer" (B) on the "base layer" (A), a third "water-activatable base coating" (C), and optionally an additional layer coated on the "water-activatable base coating" (C), wherein the combination of layer (A) and layer (B) forms a release liner [(A)(B)], and the combined layer (C) and the optionally coated additional layer form a film [(C)(additional layer)].

[0021] The first "base layer (A)" is a liner material, typically selected from paper or plastic.

[0022] The second "release layer (B)" is preferably selected from the group consisting of release agents.

[0023] The third "water-activatable base coating" (C) comprises a mixture of a hydrophilic polymer and a hydrophobic polymer in a ratio ranging from 1:0 to 1:10 on a solid basis.

[0024] In another embodiment of the present invention, the third "water-activatable base coating" (C) has an additional "printable layer" (Cy),

[0025] wherein the "water-activatable base coating" (C) comprises a mixture of a hydrophilic polymer and a hydrophobic polymer in a ratio ranging from 1:0 to 1:10 on a solid basis, and

[0026] The "printable layer" (Cy) comprises a mixture of hydrophilic and hydrophobic polymers, and the ratio of hydrophilic polymer to hydrophobic polymer ranges from 1:2 to 1:50 on a solid basis.

[0027] In another embodiment of the present invention, the "water-activatable base coating" (C) comprises a mixture of a hydrophilic polymer and a hydrophobic polymer, the ratio of the hydrophilic polymer to the hydrophobic polymer being in the range of 1:0 to 1:10 on a solid basis, and

[0028] The additional "top coating" (D) comprises a mixture of hydrophilic and hydrophobic polymers in a ratio ranging from 1:0 to 1:70 on a solid basis, the synthetic rubber comprises 1-13% w / w of the top coating (D), the hydroxy-reactive polysilanol comprises 0.5-5% w / w of the top coating (D), the pigment comprises 15-45% w / w of the top coating (D),

[0029] The "water-activatable base coating" (C) is capable of being activated by water without the use of any co-solvents. Description of the drawings:

[0030] Figure 1 The device of the present invention is shown, which comprises at least three layers:

[0031] "Base layer" (A)

[0032] "Release layer" (B) coated on layer (A)

[0033] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0034] • Apply a "water-activatable base coat" (C) over layer B.

[0035] • Layer C forms a "film" [(C)].

[0036] Figure 2 The device of the present invention is shown, which comprises at least three layers:

[0037] "Base layer" (A)

[0038] "Release layer" (B) coated on layer (A)

[0039] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0040] "Water-activatable base coating" (C) applied on layer (B)

[0041] "Printable layer" (Cy) coated on layer (C)

[0042] The combination of layer (C) and layer (Cy) forms a "film" [(C)(Cy)].

[0043] Figure 3 The device of the present invention is shown, which comprises at least three layers:

[0044] "Base layer" (A)

[0045] "Release layer" (B) coated on layer (A)

[0046] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0047] "Water-activatable base coating" (C) applied on layer (B)

[0048] "Top coating" (D) applied on layer (C)

[0049] The combination of layers (C) and (D) forms a "film" [(C)(D)] Specific implementation method:

[0050] The present invention is described with reference to the accompanying drawings. However, it should be clear that this description is only an illustration of the present invention and is by no means a limitation of the present invention.

[0051] The terms and words used in the following description are not limited to their literal meanings. The description represents illustrative embodiments and examples. The drawings and / or illustrations in no way limit the scope of the present invention. It should be understood that modifications and / or changes to the drawings / illustrations of the present invention, in addition to those specifically set forth herein, can be implemented by those skilled in the art, and these modifications and changes should be considered to fall within the overall scope of the present invention.

[0052] With reference to the accompanying drawings, Figure 1 The device of the present invention is shown, which comprises at least three layers:

[0053] "Base layer" (A)

[0054] "Release layer" (B) coated on layer (A)

[0055] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0056] • Apply a "water-activatable base coat" (C) over layer B.

[0057] • Layer C forms a "film" [(C)] of 15 GSM to 70 GSM.

[0058] like Figure 2 As shown, another embodiment of the present invention includes:

[0059] "Base layer" (A)

[0060] "Release layer" (B) coated on layer (A)

[0061] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0062] "Water-activatable base coating" (C) applied on layer (B)

[0063] "Printable layer" (Cy) coated on layer (C)

[0064] The combination of layer (C) and layer (Cy) forms a "film" [(C)(Cy)] of 15 GSM to 70 GSM.

[0065] like Figure 3 As shown, another embodiment of the present invention includes:

[0066] "Base layer" (A)

[0067] "Release layer" (B) coated on layer (A)

[0068] The combination of layer (A) and layer (B) forms the "release liner" [(A)(B)].

[0069] "Water-activatable base coating" (C) applied on layer (B)

[0070] "Top coating" (D) applied on layer (C)

[0071] The combination of layers (C) and (D) forms a "film" [(C)(D)] of 15 GSM to 300 GSM.

[0072] The "base layer" (A) is the liner material, typically selected from paper or plastic.

[0073] The paper in the "base layer" (A) is selected from supercalendered kraft (SCK) paper, polycoated kraft paper, glassine paper, clay coated kraft (CCK) paper, machine finished kraft (MFK) paper or machine finished glazed (MG) paper.

[0074] In embodiments where the "base layer" (A) is plastic, the plastic is selected from PET film (biaxially oriented), poly-coated BO-PET film, BOPP (biaxially oriented PP film) or other polyolefins, typically including HDPE, LDPE or PP plastic resins.

[0075] The "release layer" (B) is selected from silicone release agents, phosphate esters, alkylated phosphate esters, fluoropolymers, preferably silicone release agents.

[0076] like Figure 1 As shown, the "water-activatable base coating" (C) is coated on the "release layer" (B), which serves as a water-activatable and printable film that can be transferred and attached to any surface, including hydrophilic and hydrophobic polymers, wherein the ratio of hydrophilic and hydrophobic polymers on a solid basis ranges from 1:0 to 1:10, preferably 1:5 to 1:8, and most preferably 1:5 to 1:7. In addition, layer (C) can also be colored to obtain a colored film.

[0077] In another embodiment of the present invention, Figure 2 As shown, the "water-activatable base coating" (C) comprises hydrophilic and hydrophobic polymers, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, and most preferably from 1:1 to 1:1.5. The film [(C)(Cy)] also comprises a "printable layer" (Cy), which serves as an ink-absorbing coating, comprising hydrophilic and hydrophobic polymers, wherein the ratio of hydrophilic polymer to hydrophobic polymer on a solid basis ranges from 1:2 to 1:50, preferably from 1:4 to 1:30, and most preferably from 1:6 to 1:10. In addition, layer (C) and / or layer (Cy) may also be pigmented to obtain a colored film.

[0078] like Figure 3As shown, in another embodiment of the present invention, layer (C) comprises a mixture of hydrophilic and hydrophobic polymers. The ratio of hydrophilic polymer to hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, and most preferably from 1:1 to 1:1.5.

[0079] Layer (D) comprises a mixture of hydrophilic and hydrophobic polymers, a synthetic rubber (preferably SBR), a hydroxyl-reactive polysilanol and optionally a pigment. The ratio of hydrophilic polymer to hydrophobic polymer on a solid basis ranges from 1:0 to 1:70, preferably from 1:30 to 1:60, most preferably from 1:40 to 1:50.

[0080] In layer (D), the synthetic rubber accounts for 1-13% w / w of layer (D), preferably 1-8% w / w; the hydroxy-reactive polysilicone accounts for 0.5-5% w / w of layer (D), preferably 1-3% w / w; and the optional pigment accounts for 15-45% w / w of layer (D), preferably 20-25% w / w.

[0081] The hydrophilic polymer in layer (C), layer (Cy) and layer (D) is selected from polyvinyl alcohol, polyvinyl pyrrolidone, starch, dextrin, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, preferably polyvinyl alcohol and polyvinyl pyrrolidone.

[0082] The hydrophobic polymer in layer (C), layer (Cy) and layer (D) is selected from acrylic polymer emulsion / synthetic rubber (preferably SBR) / polyvinyl acetate latex / styrene-acrylic copolymer emulsion (preferably styrene-acrylic copolymer emulsion), as well as acrylic polymers, polyamides, epoxy resins, polyesters and polyolefins, and synthetic rubbers.

[0083] The solvent for dissolving the hydrophobic polymer may be selected from ketones, esters, alcohols, aromatic hydrocarbons, ester alcohols and alcohol ketones.

[0084] In all embodiments, pigments can be added during processing to obtain colored films. In addition, dry film preservatives can be added to the film to obtain antibacterial films. Additional layers can be coated or applied in the form of varnishes or waterproof coatings, or laminated on the film.

[0085] Preparation process of the multilayer device of the present invention

[0086] Preparation Figure 1 The process of the embodiment of the invention shown comprises the following steps:

[0087] 1. Preparation of "release liner" [(A)(B)]

[0088] - A release agent is coated on the "base layer" (A) to obtain a "release layer" (B), and dried at 160°C to 180°C.

[0089] 2. Apply a "water-activatable base coating" (C) on the "release liner" [(A)(B)]

[0090] a. Place the hydrophobic polymer emulsion / solution into a mixing tank and stir at high speed.

[0091] b. Add the dispersant to the hydrophobic polymer emulsion / solution under stirring, and then optionally add the titanium dioxide (rutile) paste under stirring to achieve homogenization.

[0092] c. adding the hydrophilic polymer solution to the above mixture under stirring, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing any extraneous matter, if any, to obtain a "coating coating",

[0093] d. coating the coating obtained in step (c) on the "release layer" (B) and drying at 120°C to 130°C to obtain a layer "C" comprising a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:5 to 1:8, most preferably from 1:5 to 1:7, and the GSM of the layer is from 15 to 70,

[0094] e. Additional layers may also be coated or applied to the membrane in the form of a varnish or waterproof coating, or laminated to the additional membrane.

[0095] Preparation Figure 2 The process of the embodiment of the invention shown comprises the following steps:

[0096] 1. Preparation of "release liner" [(A)(B)]

[0097] A release agent is coated on the "base layer" (A) to obtain a "release layer" (B), and dried at 160°C to 180°C.

[0098] 2. Apply the "water-activatable base coating" (C) and the "printable layer" (Cy) on the "release liner" [(A)(B)]

[0099] a. Place the hydrophobic polymer emulsion into a mixing tank and stir at high speed.

[0100] b. Add the dispersant to the hydrophobic polymer emulsion under stirring, and then optionally add the titanium dioxide (rutile) paste under stirring to achieve homogenization.

[0101] c. Add the hydrophilic polymer solution to the above mixture under stirring. Optionally mix defoamer, leveling agent and dry film preservative, and remove any extraneous materials, if any, to obtain a "coating coating",

[0102] d. coating the coating obtained in step (c) on the "release layer" (B) and drying at 120°C to 130°C to obtain a "water-activatable base coating" (C) comprising a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5, and the GSM of the layer is from 10 to 30,

[0103] e. Further coating a "printable layer" (Cy) comprising a hydrophilic and a hydrophobic polymer on the "water-activatable base coating" (C), wherein the ratio of the hydrophilic polymer to the hydrophobic polymer is in the range of 1:2 to 1:50, preferably 1:4 to 1:30, most preferably 1:6 to 1:10 on a solid basis, to obtain a layer of 5 to 60 GSM, and drying at 120° C. to 130° C. The method for making the coating for the "printable layer" (Cy) is similar to the method for making the coating for the "water-activatable base coating layer" (C),

[0104] f. The film [(C)(Cy)] may also be coated or applied with an additional layer in the form of a varnish or waterproof coating, or laminated with an additional film.

[0105] Preparation Figure 3 The process of the embodiment of the invention shown comprises the following steps:

[0106] 1. Preparation of "release liner" [(A)(B)]

[0107] A release agent is coated on the "base layer" (A) to obtain a "release layer" (B), and dried at 160°C to 180°C.

[0108] 2. Apply a "water-activatable base coating" (C) on the "release liner" [(A)(B)]

[0109] Prepare the "coating coating" and then coat it on the "release liner" [(A)(B)] as follows:

[0110] a. Place the hydrophobic polymer emulsion / solution into a mixing tank and stir at high speed.

[0111] b. adding a dispersant to the hydrophobic polymer emulsion / solution under stirring, and then optionally adding titanium dioxide (rutile) paste under stirring to achieve homogenization,

[0112] c. adding the hydrophilic polymer solution to the above mixture under stirring, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing any extraneous matter, if any, to obtain a "coating coating",

[0113] d. coating the “release liner” [(A)(B)] with a “coating coating” to reach 10 to 30 GSM and drying at 120°C to 130°C to remove moisture to obtain a “water-activatable” surface as a “water-activatable base coating” (C), wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5,

[0114] 3. Apply "water-activatable base coating" (C) and "top coating" (D) on the "release liner" [(A)(B)]

[0115] The "top coating" (D) was prepared and then coated on the "water-activatable base coating" (C) as follows:

[0116] a. High-speed stirring of the hydrophobic polymer emulsion / solution, the stirring speed is preferably 800 to 1000 rpm,

[0117] b. adding a dispersant to the hydrophobic polymer emulsion / solution under stirring, and then optionally adding titanium dioxide (rutile) paste and color fine paste under stirring to achieve homogenization,

[0118] c. Add the hydrophilic polymer solution to the above mixture under stirring, then add the synthetic rubber (preferably SBR latex / solution) and hydroxyl-reactive polysilanol in sequence under stirring, optionally mix the defoamer, leveling agent and dry film preservative, and remove any extraneous materials, if any, to obtain a "coating coating",

[0119] d. Applying the "coating coating" in step (c) on the "water-activatable base coating" (C) to reach 5 to 270 GSM, and drying at 120°C to 130°C to obtain a film of 15 to 300 GSM [(C)(D)], wherein the ratio of hydrophilic polymer to hydrophobic polymer on a solid basis ranges from 1:0 to 1:70, preferably 1:30 to 1:60, most preferably 1:40 to 1:50. In the "top coating" (D), the synthetic rubber (preferably SBR) accounts for 2-8% w / w of the total batch, preferably 2-5% w / w;

[0120] Pigments may optionally be added at 15-45% w / w, preferably 20-25% w / w of the total batch weight on a solids basis;

[0121] The hydroxyl-reactive polysilanol accounts for 0.1-3% w / w of the total batch, preferably 0.5-1.5% w / w,

[0122] e. An additional layer may also be coated or applied on the "top coating" (D), in the form of a varnish or waterproof coating, or laminated with an additional film.

[0123] The present invention is illustrated below by non-limiting examples:

[0124] Example 1:

[0125] Multilayer device with tamper-resistant, water-activatable, printable film C

[0126] Preparation of multilayer devices with tamper-resistant printable films [(C)]:

[0127] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as "release liner" [(A)(B)].

[0128] ii. The preparation method of "coating coating" is as follows:

[0129] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.3% dispersant under high-speed stirring, and then add 30% of the total batch of titanium dioxide (ATR 312,

[0130] Rutile) paste (solid content 75%).

[0131] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) in the mixed state, keeping the ratio of PVA: acrylic copolymer at 1:5.3, then add 0.3% deformation agent and 0.3% leveling agent, mix for 10 minutes. Filter to obtain the "coating coating".

[0132] iii. Coat the "release liner" [(A)(B)] on layer (B) with the "coating coating" and dry at 120-130°C to obtain a coating of 30-32 GSM of the "water-activatable base coating" (C).

[0133] Example 2:

[0134] Multilayer devices with tamper-resistant, water-activatable, printable films [(C)(Cy)]

[0135] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as a release liner [(A)(B)].

[0136] ii. The coating for the "water-activatable base coating" (C) was prepared as follows:

[0137] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.4% dispersant under high-speed stirring, and then add 14% of the total batch of titanium dioxide (ATR 312,

[0138] Rutile) paste (solid content 75%).

[0139] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) under stirring, keeping the ratio of PVA: acrylic acid copolymer at 1:1.33, and then filter to obtain

[0140] "Applicable coating" of "water-activatable base coating" (C).

[0141] iii. The "coating coating" for the "water-activatable base coating" (C) was applied on the "release liner" [(A)(B)] and dried at 120-130°C to obtain a coating weight of 12-13 GSM for the "water-activatable base coating" (C).

[0142] iv. The preparation method of the "coating coating" for the "printable layer" (Cy) is as follows:

[0143] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.25% dispersant under high-speed stirring, and then add 30% of the total batch of titanium dioxide (ATR

[0144] 312, rutile) paste (solid content 75%).

[0145] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) in the mixed state, keeping the ratio of PVA: acrylic copolymer at 1:10, then add 0.3% deformation agent and 0.3% leveling agent, mix for 10 minutes. After filtering, obtain the "coating coating" (Cy) for the "printable layer".

[0146] v. Applying the "Water-activatable base coating" (C) using the "Coating coating for the "Printable layer" (Cy)" and drying at 120-130°C to obtain a coating of 15-16 GSM of the "Printable layer" (Cy) to form a film with a total GSM of 27-29 [(C)(Cy)].

[0147] Example 3:

[0148] Multilayer devices with tamper-resistant, water-activatable, printable films [(C)(Cy)]

[0149] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as "release liner" [(A)(B)].

[0150] ii. The coating for the "water-activatable base coating" (C) was prepared as follows:

[0151] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.4% dispersant under high-speed stirring, and then add 11% of the total batch of titanium dioxide (ATR 312,

[0152] Rutile) paste (solid content 75%).

[0153] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) under stirring, keeping the ratio of PVA: acrylic acid copolymer at 1:0.55, and then filter to obtain

[0154] "Applicable coating" of "water-activatable base coating" (C).

[0155] iii. The "coating coating" for the "water-activatable base coating" (C) was applied on the "release liner" [(A)(B)] and dried at 120-130°C to obtain a coating weight of 15-16 GSM for the "water-activatable base coating" (C).

[0156] iv. The preparation method of the "coating coating" for the "printable layer" (Cy) is as follows:

[0157] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.25% dispersant under high-speed stirring, and then add 25% of the total batch of titanium dioxide (ATR

[0158] 312, rutile) paste (solid content 75%).

[0159] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) in the mixed state, keeping the ratio of PVA: acrylic copolymer at 1:8, then add 0.3% deformation agent and 0.4% leveling agent, mix for 10 minutes. After filtering, obtain the "coating coating" (Cy) for the "printable layer".

[0160] v. Applying the "Water-activatable Base Coating" (C) using the "Coating Coating for the "Printable Layer" (Cy)" and drying at 120-130°C to obtain a coating of 22-24 GSM of the "Printable Layer" (Cy) to form a film with a total GSM of 37-40 [(C)(Cy)].

[0161] Example 4:

[0162] Multilayer device with waterproof water-activated membrane [(C)(D)]

[0163] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as "release liner" [(A)(B)].

[0164] ii. The preparation method of coating-1 is as follows:

[0165] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.4% dispersant under high-speed stirring, and then add 13% of the total batch of titanium dioxide (ATR 312,

[0166] Rutile) paste (solid content 75%).

[0167] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) under stirring, keeping the ratio of PVA: acrylic copolymer at 1:1, then add 0.3% deformation agent and 0.4% leveling agent, mix for 10 minutes. After filtering, obtain "coating coating 1".

[0168] iii. "Coating Coating 1" was used to coat on "Release Liner" [(A)(B)] and dried at 120-130°C to obtain a coating weight of 18-20 GSM for "Water-activatable Base Coating" (C).

[0169] iv. The preparation method of "coating coating 2" is as follows:

[0170] Add acrylic copolymer emulsion (54% solid content) to a mixing pot, add 0.4% dispersant under high-speed stirring, then add titanium dioxide (ATR 312, rutile) paste (75% solid content) with a solid content of 20% of the total batch, SBR latex with a total batch content of 2.5% and 2.5% hydroxyl-reactive polysilanol.

[0171] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) while mixing, keeping the ratio of PVA: acrylic copolymer at 1:40, then add 0.9% dry film preservative and mix for 10 minutes. After filtering, obtain "coating coating 2".

[0172] v. Apply the "Water-activatable Base Coating" (C) using "Coating Coating 2" and dry at 120-130°C to obtain a coating of 80-90 GSM for the "Top Coating" (D), thereby forming a film with a total GSM of 100-110 [(C)(D)].

[0173] Example-5

[0174] Multilayer devices with tamper-resistant, water-activatable, printable films [(C)(Cy)]

[0175] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as a release liner [(A)(B)].

[0176] ii. The coating for the "water-activatable base coating" (C) was prepared as follows:

[0177] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.4% dispersant under high-speed stirring, and then add 14% of the total batch of titanium dioxide (ATR 312,

[0178] Rutile) paste (solid content 75%).

[0179] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) under stirring, keeping the ratio of PVA: acrylic acid copolymer at 1:1.33, and then filter to obtain

[0180] "Applicable coating" of "water-activatable base coating" (C).

[0181] iii. The "coating coating" for the "water-activatable base coating" (C) was applied on the "release liner" [(A)(B)] and dried at 120-130°C to obtain a coating weight of 12-13 GSM for the "water-activatable base coating" (C).

[0182] iv. The preparation method of the "coating coating" for the "printable layer" (Cy) is as follows:

[0183] Add acrylic polymer solution (50% solid content) to the mixing pot, add 0.30% dispersant under high-speed stirring, and then add 30% of the total batch of titanium dioxide (ATR

[0184] 312, rutile) paste (solid content 75%).

[0185] Continue mixing and add PVPK-30 (polyvinyl pyrrolidone K-30) solution (solid content 30%) in the mixed state, keeping the ratio of PVPK-30: acrylic polymer at 1:10, then add 0.3% leveling agent and mix for 10 minutes. After filtering, obtain the "coating coating" (Cy) for the "printable layer".

[0186] v. Applying the "Water-activatable base coating" (C) using the "Coating coating for the "Printable layer" (Cy)" and drying at 120-130°C to obtain a coating of 15-16 GSM of the "Printable layer" (Cy) to form a film with a total GSM of 27-30 [(C)(Cy)].

[0187] Example-6

[0188] Multilayer device with waterproof water-activated membrane [(C)(D)]

[0189] i. Silicone was coated on "base layer" (A) 90 GSM CCK (clay coated kraft) paper and dried at 170 to 180°C to obtain 1.0 to 1.5 GSM "release layer" (B). This CCK paper coated with silicone was used as "release liner" [(A)(B)].

[0190] ii. The preparation method of coating-1 is as follows:

[0191] Add acrylic copolymer emulsion (solid content 54%) to the mixing pot, add 0.4% dispersant under high-speed stirring, and then add 13% of the total batch of titanium dioxide (ATR 312,

[0192] Rutile) paste (solid content 75%).

[0193] Continue mixing and add polyvinyl alcohol solution (solid content 13.5%, aqueous solution) under stirring, keeping the ratio of PVA: acrylic copolymer at 1:1, then add 0.3% deformation agent and 0.4% leveling agent, mix for 10 minutes. After filtering, obtain "coating coating 1".

[0194] iii. "Coating Coating 1" was used to coat on "Release Liner" [(A)(B)] and dried at 120-130°C to obtain a coating weight of 18-20 GSM for "Water-activatable Base Coating" (C).

[0195] iv. The preparation method of "coating coating 2" is as follows:

[0196] Add acrylic polymer solution (50% solid content) to the mixing pot, then add 0.4% dispersant under high-speed stirring, then add titanium dioxide (ATR 312, rutile) paste (75% solid content) with a solid content of 20% of the total batch, 3.0% SBR and 2.0% hydroxyl-reactive polysilanol.

[0197] Continue mixing and add PVPK-30 (polyvinyl pyrrolidone K-30) solution (30% solid content) while mixing, keeping the ratio of PVPK: acrylic polymer at 1:45, then add 0.8% dry film preservative and mix for 10 minutes. After filtering, obtain "coating coating 2".

[0198] v. Apply "Water-activatable Base Coating" (C) using "Coating Coating 2" and dry at 120-130°C to obtain a coating of 90-100 GSM for "Top Coating" (D), thereby forming a film with a total GSM of 110-120 [(C)(D)].

[0199] Membrane Application:

[0200] The present invention meets a heretofore unmet need by providing a multi-layer device comprising a printable, water-activatable, self-adhesive film that is environmentally friendly, PVC-free, VOC-free, transferable to any surface, without the use of solvents, without the need for extensive pre-treatment of the surface, greatly reducing spraying time, and avoiding the discomfort associated with lingering paint odors.

[0201] Application of the multi-layer water-activatable device of the present invention:

[0202] a) washing and wetting the substrate surface to which the film [(C)(D)] or [(C)(Cy)] or (C) is to be transferred with water,

[0203] b) peeling the film [(C)(D)] or [(C)(Cy)] or (C) from the "release liner" [(A)(B)],

[0204] c) laying the (C) side of the film onto said pre-wetted substrate surface, wherein (C) is activated to enable the film to transfer and adhere to said substrate surface,

[0205] d) applying water on top of the membrane (D) / (Cy) / (C) surface, pressing said top surface of the membrane to ensure that the membrane adheres to the surface,

[0206] e) Remove air bubbles, if any, between the transferred film and the surface by known methods.

[0207] advantage :

[0208] In addition to overcoming the shortcomings of existing products, technologies and practices related to the coatings industry, the present invention provides multi-layer devices including printable water-activatable self-adhesive films having significant advantages:

[0209] The water-activatable self-adhesive film is activated with water without the use of any co-solvents.

[0210] Environmentally friendly, PVC-free, VOC-free, transferable to any surface, no need to use solvents, extensive pre-treatment of the surface, greatly shortening the spraying time, avoiding discomfort caused by lingering paint odors, and meeting the requirements of EN-71 Part 3.

[0211] Transferrable to metal, non-metal, such as wall, laminate, metal, tile, glass, wood, stone, cement or plastic, regardless of the surface shape and texture of the substrate.

[0212] Capable of being loaded with pigments and / or printed with different printing inks and printing methods.

[0213] Variable washability and water resistance.

[0214] Tamper-proof.

[0215] It can be produced on a commercial scale in a cost-effective manner and used for surface protection and decoration.

[0216] Easy to use by the public as a do-it-yourself (DIY) product.

[0217] Suitable for interior wall coatings, printed graphic applications, advertising, promotions, labels and other marketing activities and surface coverings in residential and commercial establishments.

Claims

1. A multilayer device having a water-activatable self-adhesive film, comprising: at least three layers, a first "base layer" (A), a second "release layer" (B) on the "base layer" (A), a third "water-activatable base coating" (C), optionally with an additional layer coated on the "water-activatable base coating" (C), in, The combined layers (A) and (B) form a release liner [(A)(B)], and Combining layer (C) and optionally applied additional layers to form a film [(C)(additional layer)]; wherein layer (C) and optionally applied additional layers comprise a hydrophilic polymer and a hydrophobic polymer, wherein The hydrophilic polymer is selected from polyvinyl alcohol, polyvinyl pyrrolidone, starch, dextrin, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, preferably polyvinyl alcohol and polyvinyl pyrrolidone, and The hydrophobic polymer is selected from acrylic polymer emulsion / latex, preferably SBR latex / polyvinyl acetate latex / styrene-acrylic polymer emulsion, preferably styrene-acrylic polymer emulsion, and acrylic polymers, polyamides, epoxy resins, polyesters and polyolefins, and synthetic rubbers.

2. The multilayer device according to claim 1, wherein the "water-activatable base coating" (C) comprises a mixture of hydrophilic polymers and hydrophobic polymers in a ratio ranging from 1:0 to 1:10, preferably from 1:5 to 1:8, most preferably from 1:5 to 1:7 on a solid basis, and optionally a pigment, said layer (C) forming a film (C) of 15-70 GSM.

3. The multilayer device according to claims 1-2, wherein the "water-activatable base coating" (C) comprises a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5, wherein said layer (C) is coated with a "printable layer" (Cy), which printable layer (Cy) comprises a mixture of hydrophilic polymer and hydrophobic polymer, wherein the ratio of hydrophilic polymer to hydrophobic polymer on a solid basis ranges from 1:2 to 1:50, preferably from 1:4 to 1:30, most preferably from 1:6 to 1:10, layer (C) and / or (Cy) optionally comprises a pigment, and the combination of layer (C) and layer (Cy) forms a "film" [(C)(Cy)] of 15-70 GSM.

4. The multilayer device according to claim 1, wherein the "water-activatable base coating" (C) comprises a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer to hydrophobic polymer as solids ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5, wherein the layer (C) is coated with a layer (D) comprising a mixture of hydrophilic polymer and hydrophobic polymer, wherein the ratio of hydrophilic polymer to hydrophobic polymer as solids ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.

5. The ratio of the molecular weight of layer (C) to layer (D) is 1:0 to 1:70, preferably 1:30 to 1:60, most preferably 1:40 to 1:50, the SBR latex accounts for 1-13% w / w, preferably 1-8% w / w of layer (D), the hydroxyl-reactive polysilicone accounts for 0.5-5% w / w, preferably 1-3% w / w of layer (D), the optional pigment accounts for 15-45% w / w, preferably 20-25% w / w of layer (D), and the combination of layer (C) and layer (D) forms a "film" [(C)(D)] of 15-300 GSM.

5. A method for preparing a multilayer device according to claims 1-2, comprising at least three layers, a first "base layer" (A), a second "release layer" (B) on the "base layer" (A), a third "water-activatable base coating" (C), said method comprising the following steps: i. coating a release agent on the "base layer" (A) to obtain the "release layer" (B), and drying at 160°C to 180°C to obtain a "release liner" [(A) (B)]; ii. Applying the "water-activatable base coating" (C) on the "release liner" [(A)(B)], the steps are as follows a. adding a dispersant to the stirred hydrophobic polymer emulsion, and then optionally adding titanium dioxide (rutile) paste under stirring, b. adding the hydrophilic polymer solution to the mixture in step (a) under stirring, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing extraneous materials, if any, To obtain the "coating paint", c. Coating step (b) on the "release layer" (B) of the "release liner" [(A)(B)] and drying at 120°C to 130°C to obtain a layer "C" comprising a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:5 to 1:8, most preferably from 1:5 to 1:7, the GSM of the layer being from 15 to 70, d. Optionally coating or applying a varnish or waterproof coating to the membrane, or laminating with additional membranes.

6. A method for preparing a multilayer device according to claims 1 and 3, comprising at least three layers, a first "base layer" (A), a second "release layer" (B) on the "base layer" (A), a third "water-activatable base coating" (C) and an additional "printable layer" (Cy) on layer (C), the method comprising the steps of: i. coating a release agent on the "base layer" (A) to obtain a "release layer" (B), and drying at 160°C to 180°C to obtain a "release liner" [(A) (B)]; ii. Applying the "water-activatable base coating" (C) on the "release liner" [(A)(B)], the steps are as follows a. adding a dispersant to the stirred hydrophobic polymer emulsion, and then optionally adding titanium dioxide (rutile) paste under stirring, b. adding the hydrophilic polymer solution to the mixture in step (a) under stirring, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing extraneous materials, if any, To obtain the "coating paint", c. Coating step (b) on the "release layer" (B) of the "release liner" [(A)(B)] and drying at 120° C. to 130° C. to obtain a layer “C” comprising a hydrophilic polymer and a hydrophobic polymer, wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5, thereby obtaining a “water-activatable base coating” (C) having a GSM of 10-30; d. coating an ink receiving coating "printable layer" (Cy) comprising a hydrophilic polymer and a hydrophobic polymer on said "water activatable base coating" (C), wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:2 to 1:50, preferably from 1:4 to 1:30, most preferably from 1:6 to 1:10, and drying at 120°C to 130°C to obtain a "printable layer" (Cy) of 5 to 60 GSM, The combination of layer (C) and layer (Cy) forms a "film" [(C)(Cy)] of 15-70 GSM. e. Optionally coating or applying a varnish or waterproof coating on the film, or laminating with additional films.

7. A method for preparing a multilayer device according to claims 1 and 4, said multilayer device comprising at least three layers, a first "base layer" (A), a second "release layer" (B) on said "base layer" (A), a third "water-activatable base coating" (C) and an additional "top coating" (D) on said layer (C), said method comprising the steps of: i. coating a release agent on the "base layer" (A) to obtain a "release layer" (B), and drying at 160°C to 180°C to obtain a "release liner" [(A) (B)]; ii. Applying the "water-activatable base coating" (C) on the "release liner" [(A)(B)], the steps are as follows a. adding a dispersant to the stirred hydrophobic polymer emulsion, and then optionally adding titanium dioxide (rutile) paste under stirring, b. adding the hydrophilic polymer solution to the mixture in step (a) under stirring, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing extraneous materials, if any, To obtain the "coating paint", c. a "coating coating" is coated on the "release liner" [(A)(B)], dried at 120°C to 130°C to remove moisture to obtain a "water-activatable" surface as a "water-activatable base coating" (C), wherein the ratio of hydrophilic polymer: hydrophobic polymer on a solid basis ranges from 1:0 to 1:10, preferably from 1:1 to 1:3, most preferably from 1:1 to 1:1.5, to achieve 10 to 30 GSM, iii. Apply the "top coating" (D) on the "water-activatable base coating" (C) as follows: f. mixing the dispersant with the hydrophobic polymer emulsion / solution under stirring, and then optionally adding titanium dioxide (rutile) and pigment under stirring, g. adding the hydrophilic polymer solution to the mixture of step (a) under stirring, then successively adding the synthetic rubber and the hydroxyl-reactive polysilanol, optionally mixing a defoamer, a leveling agent and a dry film preservative, and removing any extraneous matter, if any, to obtain a "coating coating", c. applying the "coating coating" in step (b) on the "water-activatable base coating" (C), and drying at 120°C to 130°C to obtain a "top coating" (D) having a hydrophilic polymer: hydrophobic polymer ratio ranging from 1:0 to 1:70, preferably 1:30 to 1:60, most preferably 1:40 to 1:50 on a solid basis, synthetic rubber, preferably SBR, accounting for 2-8% w / w of the total batch, Preferably 2-5% w / w, optionally added pigments account for 15-45% w / w of the total batch, preferably 20-25% w / w, hydroxyl-reactive polysilanol accounts for 0.1-3% w / w of the total batch, preferably 0.5-1.5% w / w, to obtain a film of 15-300 GSM, preferably 60-170 GSM [(C)(D)], d. Applying an additional layer on the "top coating" (D), which is in the form of a varnish or waterproof coating, or laminating with an additional film.

8. The “base layer (A)” according to claims 1-7 is a lining material, which is selected from paper, such as super calendered kraft (SCK) paper, poly coated kraft paper, glassine paper, clay coated kraft (CCK) paper, machine finished kraft (MFK) paper or machine finished glazed (MG) paper.

9. The first "base layer (A)" according to claims 1-7 is a lining material, which is selected from plastics, such as PET film (biaxially oriented), poly-coated BO-PET film, BOPP (biaxially oriented PP film) or other polyolefins, typically including HDPE, LDPE or PP plastic resins.

10. The “release layer (B)” according to claims 1 to 7 is selected from the group consisting of phosphate esters, alkylated phosphate esters, fluoropolymers and silicone release agents.

11. The multi-layer device according to claims 1-10 is environmentally friendly, free of PVC and VOC, and can be transferred to any surface.

12. A method for applying a film (C) or a film [(C)(Cy)] or a film [(C)(D)] of a multilayer device according to claims 1 to 11 onto any metallic or non-metallic surface regardless of the surface shape and texture, comprising the following steps: a) washing and wetting the substrate surface to which the film [(C)(D)] or the film [(C)(Cy)] or the film (C) is to be transferred with water, b) peeling the film [(C)(D)] or the film [(C)(Cy)] or the film (C) from the "release liner" [(A)(B)], c) laying the (C) side of the film onto the pre-wetted substrate surface, wherein (C) is activated to enable the film to transfer and adhere to the substrate surface, d) applying water on top of the membrane (D) / (Cy) / (C) surface, pressing the top surface of the membrane to ensure that the membrane adheres to the surface, e) Remove air bubbles, if any, between the transferred film and the surface by known methods.

Images