PU printed and embossed tablecloth based on antifouling protective layer

Abstract

The invention relates to the related technical field of PU printed and embossed tablecloth, and discloses a PU printed and embossed tablecloth based on an antifouling protective layer, the PU printed and embossed tablecloth comprises a PU base material layer, the surface of the PU base material layer is sequentially provided with a printed layer and a multi-layer composite oil-proof antifouling coating from bottom to top, the multi-layer composite oil-proof antifouling coating is composed of a bottom layer, a middle layer and a surface layer, the bottom layer is an adhesion enhancement layer, adopts a silane coupling agent or a polyurethane substrate coating, has the thickness of 1-2 microns, and is used for enhancing the adhesion between the oil-proof and antifouling coating and the PU substrate layer; the middle layer is a function enhancement layer and is formed by compounding fluoride resin, nano silicon dioxide particles and polytetrafluoroethylene (PTFE); the PU printed and embossed tablecloth based on the antifouling protection layer has the following effects that long-acting oil-proof and antifouling effects are achieved, the long-acting oil-proof, antifouling and waterproof effects are achieved through the multi-layer coating design and the nanoscale microstructure technology, oil stains and liquid are difficult to adhere to the surface of the tablecloth, and cleaning is convenient and fast.

Description

Technical Field

[0001] The invention belongs to the technical field related to PU printed embossed tablecloths, and more specifically, particularly relates to a PU printed embossed tablecloth based on an anti-fouling protective layer. Background Art

[0002] Most tablecloths on the market are made of PVC, PEVA, cotton and other materials. Although these tablecloths have certain anti-fouling properties, oil and water stains are easy to adhere to and difficult to clean after long-term use. In addition, the existing oil and anti-fouling layers often lack durability, and the coating is easily worn out during frequent use, resulting in a weakened anti-fouling effect. The existing technology also has a difficult balance between aesthetics and functionality, and the oil-proof layer often affects the texture and appearance of the tablecloth.

[0003] Therefore, the market urgently needs a tablecloth product that is both aesthetically pleasing, has long-lasting oil and stain resistance, is wear-resistant, environmentally friendly and safe, and can meet the diverse needs of families, restaurants, medical facilities, etc.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a PU printed embossed tablecloth based on an anti-fouling protective layer is provided, in order to achieve a more practical and valuable purpose. Summary of the invention

[0005] The invention provides a PU printed embossed tablecloth based on an antifouling protective layer, which is used to overcome the above-mentioned defects in the prior art.

[0006] The purpose and effect of the PU printed embossed tablecloth based on the antifouling protective layer of the present invention are achieved by the following specific technical means: A PU printed embossed tablecloth based on an antifouling protective layer, comprising: A PU substrate layer, wherein the surface of the PU substrate layer is provided with a printing layer and a multi-layer composite oil-proof and antifouling coating in sequence from bottom to top, wherein the multi-layer composite oil-proof and antifouling coating consists of a bottom layer, an intermediate layer and a surface layer, The bottom layer is an adhesion enhancement layer, which uses a silane coupling agent or a polyurethane base coating with a thickness of 1 to 2 microns and is used to enhance the adhesion between the oil-proof and antifouling coating and the PU substrate layer; The intermediate layer is a function enhancement layer, which is composed of fluoride resin, nano-silicon dioxide particles and polytetrafluoroethylene (PTFE), has a thickness of 3 to 5 microns, and is used to provide oil-proof, anti-fouling and waterproof functions; The surface layer is a wear-resistant hydrophobic layer, which is a composite of perfluoroalkoxy resin (PFPE) and polytetrafluoroethylene (PTFE), has a thickness of 2 to 3 microns, and has a nano-scale concave-convex microstructure on the surface to enhance the oleophobic and hydrophobic properties of the coating and form a lotus leaf effect.

[0007] According to a further technical solution, the thickness of the PU substrate layer is 0.3-0.5 mm, and the substrate layer is subjected to a hot pressing process to form an embossed layer having a three-dimensional concave-convex texture, so as to enhance the decorativeness and anti-slip performance of the tablecloth.

[0008] According to a further technical solution, the printing layer is printed by screen printing or digital printing technology, using environmentally friendly wear-resistant ink to print the pattern, and undergoes anti-ultraviolet treatment to ensure that the printed pattern is not easy to fade under long-term sunlight exposure.

[0009] According to a further technical solution, the nano-concave-convex microstructure of the surface layer can make the contact angle of the liquid on the surface of the tablecloth greater than 150°, thereby achieving waterproof and self-cleaning functions, and oil stains and water droplets can slide off quickly, reducing the adhesion of stains.

[0010] According to a further technical solution, the multi-layer composite oil-proof and antifouling coating is coated on the PU substrate layer by electrostatic spraying technology, and is cured by ultraviolet light curing or heat treatment, so that the coating and the PU substrate layer are firmly bonded and have excellent wear resistance.

[0011] According to a further technical solution, the oil-proof and antifouling coating contains an antibacterial agent, which is a nano-silver or zinc-based antibacterial agent, which can inhibit the growth of common bacteria such as Escherichia coli and Staphylococcus aureus, thereby improving the antibacterial properties of the tablecloth and is suitable for places with high hygiene standards.

[0012] According to a further technical solution, the oil-proof and antifouling coating is resistant to high temperatures, can maintain its oleophobic and hydrophobic properties at 100°C, and can withstand more than 30 washing cycles while maintaining an antifouling effect of not less than 90%.

[0013] According to a further technical solution, the middle layer of the oil-proof and antifouling coating is composed of a composite of fluoride resin and nano-silicon dioxide particles, wherein the nano-silicon dioxide particles have a particle size of 10 to 100 nanometers, and are used to improve the hydrophobicity and wear resistance of the coating.

[0014] According to a further technical solution, the surface layer is made of a composite material of perfluoroalkoxy resin and PTFE, which has an extremely low surface energy, can significantly reduce the adhesion of liquids and oil stains to the surface of the tablecloth, and can maintain oleophobic and anti-fouling properties after frequent washing or wiping.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The PU printed embossed tablecloth based on the antifouling protective layer of the present invention has the following effects: Long-lasting oil and stain resistance: The present invention achieves long-lasting oil, stain and water resistance through multi-layer coating design and nano-scale microstructure technology. Oil and liquid are difficult to adhere to the surface of the tablecloth, and it is easy to clean.

[0016] Wear resistance and durability: The coating is UV cured to ensure its wear resistance and durability in frequent use. After 500 friction tests, the tablecloth can still maintain its oil and stain resistance, suitable for high-intensity use scenarios.

[0017] Antibacterial: The antibacterial agent in the coating can effectively inhibit the growth of bacteria, ensuring that the tablecloth remains hygienic during use, and is particularly suitable for places that require high cleanliness.

[0018] Self-cleaning function: The surface microstructure design ensures that the coating can self-clean, and oil and water droplets are difficult to adhere to. Users only need to wipe the surface of the tablecloth to clean it.

[0019] Environmental protection and safety: The materials of the present invention are all environmentally friendly and non-toxic materials, suitable for contact with food, and meet international environmental protection standards to ensure safety in use. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The present invention provides a PU printed embossed tablecloth based on an antifouling protective layer, comprising: A PU substrate layer, wherein the surface of the PU substrate layer is provided with a printing layer and a multi-layer composite oil-proof and antifouling coating in sequence from bottom to top, wherein the multi-layer composite oil-proof and antifouling coating consists of a bottom layer, an intermediate layer and a surface layer, The bottom layer is an adhesion enhancement layer, which uses a silane coupling agent or a polyurethane base coating with a thickness of 1 to 2 microns and is used to enhance the adhesion between the oil-proof and antifouling coating and the PU substrate layer; The intermediate layer is a function enhancement layer, which is composed of fluoride resin, nano-silicon dioxide particles and polytetrafluoroethylene (PTFE), has a thickness of 3 to 5 microns, and is used to provide oil-proof, anti-fouling and waterproof functions; The surface layer is a wear-resistant hydrophobic layer, which is a composite of perfluoroalkoxy resin (PFPE) and polytetrafluoroethylene (PTFE), has a thickness of 2 to 3 microns, and has a nano-scale concave-convex microstructure on the surface to enhance the oleophobic and hydrophobic properties of the coating and form a lotus leaf effect.

[0022] Preferably, the thickness of the PU substrate layer is 0.3-0.5 mm, and the substrate layer is formed into an embossed layer with a three-dimensional concave-convex texture by a hot pressing process, so as to enhance the decorativeness and anti-slip performance of the tablecloth.

[0023] Preferably, the printing layer adopts screen printing or digital printing technology, uses environmentally friendly wear-resistant ink to print the pattern, and undergoes anti-ultraviolet treatment to ensure that the printed pattern is not easy to fade under long-term sunlight exposure.

[0024] Preferably, the nano-concave-convex microstructure of the surface layer can make the contact angle of the liquid on the surface of the tablecloth greater than 150°, thereby achieving waterproof and self-cleaning functions, and oil stains and water droplets can slide off quickly, reducing the adhesion of stains.

[0025] Preferably, the multi-layer composite oil-proof and antifouling coating is coated on the PU substrate layer by electrostatic spraying technology, and cured by ultraviolet light curing or heat treatment, so that the coating and the PU substrate layer are firmly bonded and have excellent wear resistance.

[0026] Preferably, the oil-proof and antifouling coating contains an antibacterial agent, which is a nano-silver or zinc-based antibacterial agent, which can inhibit the growth of common bacteria such as Escherichia coli and Staphylococcus aureus, improve the antibacterial properties of the tablecloth, and is suitable for places with high hygiene standards.

[0027] Preferably, the oil-proof and antifouling coating is resistant to high temperatures, can maintain its oleophobic and hydrophobic properties at 100°C, and can withstand more than 30 washing cycles while maintaining an antifouling effect of not less than 90%.

[0028] Preferably, the middle layer of the oil-proof and antifouling coating is composed of a composite of fluoride resin and nano-silicon dioxide particles, wherein the particle size of the nano-silicon dioxide particles is 10 to 100 nanometers, which is used to improve the hydrophobicity and wear resistance of the coating.

[0029] Preferably, the surface layer is made of a composite material of perfluoroalkoxy resin and PTFE, which has extremely low surface energy, can significantly reduce the adhesion of liquids and oil stains to the surface of the tablecloth, and can maintain oleophobic and antifouling properties after frequent washing or wiping.

[0030] A method for manufacturing a PU printed embossed tablecloth, characterized in that it comprises the following steps: (1) Using PU material with a thickness of 0.3-0.5 mm as the substrate, embossing is performed to form a concave-convex texture; (2) Printing the substrate surface using environmentally friendly ink; (3) applying a multi-layer composite oil-proof and antifouling coating on the printed layer in sequence by electrostatic spraying technology, wherein the coating includes an adhesion enhancement layer, a function enhancement layer and a wear-resistant and hydrophobic layer; (4) The coating is cured by UV light curing or heat treatment to form a tablecloth with long-lasting oil and stain resistance.

[0031] PU base material layer: Material selection: The substrate layer is made of high molecular weight polyurethane (PU) material with a thickness of 0.3~0.5mm. PU material has excellent wear resistance, elasticity and waterproofness. It is also environmentally friendly and non-toxic, and complies with international environmental standards such as RoHS and REACH standards to ensure that it is harmless to the human body.

[0032] Processing: The substrate is embossed to form a three-dimensional concave-convex texture on its surface, which enhances the decorativeness and touch of the tablecloth and has an anti-slip effect. The substrate also has good tear resistance and tensile resistance, suitable for long-term use.

[0033] Printing layer: Printing process: Multi-color printing is performed on the surface of the substrate layer through screen printing or digital printing technology to ensure that the pattern is clear and not easy to fade. The ink used is environmentally friendly and wear-resistant ink, and it has been treated with anti-ultraviolet rays to ensure that the printed layer does not fade under long-term sunlight. The printed pattern can be customized according to user needs to meet the decorative needs of different scenes.

[0034] Oil-proof and anti-fouling multi-layer composite coating: The innovative core of the present invention lies in the design of a multi-layer composite oil-proof and anti-fouling coating. The coating structure can effectively improve the protective performance and enhance the wear resistance and durability of the coating.

[0035] Bottom layer (adhesion enhancement layer): The bottom layer uses a silane coupling agent or a polyurethane base coating with a thickness of 1 to 2 microns, which can enhance the adhesion between the coating and the PU substrate, prevent the coating from falling off or peeling during long-term use, and increase the service life of the coating.

[0036] Middle layer (function enhancement layer): This layer mainly provides oil and stain resistance. The middle layer is composed of fluoride resin, nano-silica particles and polytetrafluoroethylene (PTFE) with a thickness of 3~5 microns. Nano-silica particles enhance the density of the coating and form a highly hydrophobic and oleophobic surface, which can effectively prevent oil and water stains from penetrating into the surface of the tablecloth.

[0037] Surface layer (wear-resistant and hydrophobic layer): The outermost layer is made of a composite material of perfluoroalkoxy resin (PFPE) and PTFE, with a thickness of 2 to 3 microns. The surface of this layer is designed with a nano-scale microscopic concave-convex structure to form a lotus leaf effect, which significantly improves the oleophobic and hydrophobic ability of the coating. This surface layer not only has a significant anti-fouling effect, but also has extremely high wear resistance and can withstand frequent cleaning and friction.

[0038] Surface microstructure design: To further enhance the self-cleaning performance, the coating surface adopts a nano-scale microstructure design, using the "lotus effect" to prevent liquids and oil stains from adhering to the coating surface, forming a liquid beading effect, and oil stains and water stains will quickly slide off the surface of the tablecloth, ensuring that it is easy to clean. This microstructure makes the contact angle between the liquid and the tablecloth reach more than 150°, with excellent anti-fouling effect.

[0039] Antibacterial function: By adding nano-silver or zinc-based antibacterial agents to the oil-proof and anti-fouling coating, the antibacterial coating can inhibit the growth of common bacteria (such as Escherichia coli, Staphylococcus aureus, etc.), improve the hygiene performance of the tablecloth, and is suitable for places with high hygiene standards such as hospitals and restaurants.

[0040] Coating process optimization: Coating method: Use electrostatic spraying technology to evenly apply the oil-proof and anti-fouling coating on the surface of the tablecloth to ensure uniform coating thickness without affecting the softness and aesthetics of the tablecloth.

[0041] Curing: The coating is cured by UV or heat treatment to ensure a strong bond between the coating and the substrate. UV curing is not only fast and efficient, but also hardens the coating into a film, improving its wear resistance.

[0042] Multi-layer coating: Each layer of coating is cured separately to ensure maximum functionality of the multi-layer structure and enhance the protection and durability of the coating.

[0043] Durability and environmental adaptability: Friction resistance test: After 500 friction tests according to ISO 12947 standard, the coating still maintains more than 90% oil and dirt resistance, proving its durability and anti-wear performance.

[0044] High temperature and washing resistance: The coating has been tested at 100°C and 30 washing cycles, indicating that the coating can remain stable in high temperature environments and still have good anti-fouling properties after frequent washing.

[0045] Environmental protection: All materials used are environmentally friendly materials and comply with international environmental standards (such as RoHS and REACH), ensuring that the products are non-toxic and harmless, and suitable for a variety of usage scenarios such as home, restaurant, and medical.

[0046] Example 1: A PU printed embossed tablecloth, the substrate is made of a 0.4 mm thick high molecular weight PU material, and the surface is formed into a three-dimensional geometric texture through an embossing process. The surface of the PU substrate is screen-printed with environmentally friendly wear-resistant ink, and the pattern is a floral pattern. The printed layer is treated with UV resistance to ensure that it does not fade during long-term use.

[0047] The surface of the printed layer is coated with multiple layers of oil-proof and anti-fouling coatings. The bottom layer uses silane coupling agent to enhance adhesion. The middle layer is composed of fluoride resin and nano-silicon dioxide particles to provide oil-proof and anti-fouling functions. The surface layer is composed of perfluoroalkoxy resin and PTFE to form a microscopic concave-convex structure. The coating is UV cured to ensure its wear resistance and anti-fouling properties.

[0048] Example 2: An antibacterial PU printed embossed tablecloth suitable for high-sanitation environments, with a substrate thickness of 0.5 mm, a herringbone texture on the surface, and a checkered pattern. Nano-silver antibacterial agent is added to the coating, which has a long-lasting antibacterial effect and is suitable for use in hospitals and restaurants. After multiple washing and friction tests, the coating still maintains good oil and stain resistance.

[0049] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A PU printed embossed tablecloth based on an antifouling protective layer, comprising a PU substrate layer, the surface of which is provided with a printing layer and a multi-layer composite anti-oil and anti-fouling coating in sequence from bottom to top, wherein the multi-layer composite anti-oil and anti-fouling coating consists of a bottom layer, an intermediate layer and a surface layer; The bottom layer is an adhesion enhancement layer, which uses a silane coupling agent or a polyurethane base coating with a thickness of 1 to 2 microns and is used to enhance the adhesion between the oil-proof and antifouling coating and the PU substrate layer; The intermediate layer is a function enhancement layer, which is composed of fluoride resin, nano-silicon dioxide particles and polytetrafluoroethylene (PTFE), has a thickness of 3 to 5 microns, and is used to provide oil-proof, anti-fouling and waterproof functions; The surface layer is a wear-resistant hydrophobic layer, which is a composite of perfluoroalkoxy resin (PFPE) and polytetrafluoroethylene (PTFE), has a thickness of 2 to 3 microns, and has a nano-scale concave-convex microstructure on the surface to enhance the oleophobic and hydrophobic properties of the coating and form a lotus leaf effect.

2. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The thickness of the PU substrate layer is 0.3-0.5 mm, and the substrate layer is formed into an embossed layer with a three-dimensional concave-convex texture through a hot pressing process, which is used to enhance the decorativeness and anti-slip performance of the tablecloth.

3. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The printing layer adopts screen printing or digital printing technology, uses environmentally friendly wear-resistant ink to print patterns, and is treated with anti-ultraviolet rays to ensure that the printed patterns are not easy to fade under long-term sunlight exposure.

4. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The nano-concave-convex microstructure of the surface layer can make the contact angle of the liquid on the surface of the tablecloth greater than 150°, thereby achieving waterproof and self-cleaning functions, and oil stains and water droplets can slide off quickly, reducing the adhesion of stains.

5. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The multi-layer composite oil-proof and antifouling coating is coated on the PU substrate layer by electrostatic spraying technology and cured by ultraviolet light curing or heat treatment, so that the coating and the PU substrate layer are firmly bonded and have excellent wear resistance.

6. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The oil-proof and antifouling coating contains an antibacterial agent, which is a nano-silver or zinc-based antibacterial agent, which can inhibit the growth of common bacteria such as Escherichia coli and Staphylococcus aureus, improve the antibacterial performance of the tablecloth, and is suitable for places with high hygiene standards.

7. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The oil-proof and antifouling coating is resistant to high temperatures, can maintain its oleophobic and hydrophobic properties at 100°C, and can withstand more than 30 washing cycles while maintaining an antifouling effect of not less than 90%.

8. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The middle layer of the oil-proof and antifouling coating is composed of a composite of fluoride resin and nano-silicon dioxide particles, wherein the particle size of the nano-silicon dioxide particles is 10 to 100 nanometers, and is used to improve the hydrophobicity and wear resistance of the coating.

9. The PU printed embossed tablecloth based on the antifouling protective layer according to claim 1, characterized in that: The surface layer is made of a composite material of perfluoroalkoxy resin and PTFE, has extremely low surface energy, can significantly reduce the adhesion of liquids and oil stains to the surface of the tablecloth, and can maintain oleophobic and antifouling properties after frequent washing or wiping.