KR200247380Y1 - A coating goods with embossing - Google Patents

Abstract

The present invention relates to a coating product in which the surface is treated in an uneven form after applying a hydrophilic coating material to the substrate to impart oil repellency. When the coated surface is formed in the uneven form, these films are exposed to high humidity. By delaying the time so that the water droplets do not flow easily at the beginning, the coating surface becomes more clear and transparent after the water droplets flow.

Description

Uneven coating product {A COATING GOODS WITH EMBOSSING}

The present invention relates to a coated film and a coated product treated with unevenness, and more particularly, to provide unevenness to the surface of a product coated with a hydrophilic material in order to give remarkability. A coating product can be obtained.

Various plastic materials, glass, transparent ceramics and mirror materials are widely used due to their excellent transparency and mirror properties such as helmets, goggles, bathroom mirrors, eyeglass lenses, agricultural house films and food packaging films. Has been. However, when these materials are used in places where high temperature and high humidity are maintained or indoors where the temperature is kept higher than the outside atmosphere, steam condenses as fine droplets on the surface of these materials, causing the surface to steam up.

Several methods have been used to address these weaknesses. One method is to apply a hydrophilic material to the surface of the plastic or glass to impart hydrophilicity, and another method is to install a fine heating wire on the glass or plastic substrate to prevent the surface from steaming due to heat. The latter method, however, has the disadvantage that the installation cost is high and the substrate used is limited to hard glass or plastic materials. Therefore, the first method has been tried a lot recently.

However, the coating treatment method shows a significant difference in hydrophilicity and durability depending on the coating composition. In the early stages of development, coatings using hydrophilic organic substances or surfactants were used, and thermal curing or photocuring methods were used. Products coated with these methods exhibit very high hydrophilicity and exhibit hydrophilicity within a few seconds immediately after installation or when exposed to high temperature and high humidity. It shows super hydrophilicity (no water drops at all), but its durability is so weak that problems with its sustainability have arisen.

On the other hand, Japanese Patent Publication No. 97-121,232 discloses a method for producing a coating film by directly mixing with a plastic substrate because of its ease of production. These products also exhibited sustainability problems.

In addition, according to the Republic of Korea Patent No. 214,288, United States Patent No. 4,536,420 due to the problems of the method there is a limit in imparting hydrophilicity to the organic material alone has been tried to improve the durability by mixing with inorganic precursors. These compositions have good abrasion resistance but have the disadvantage of poor hydrophilicity and adhesion to the substrate.

Thus, for the purpose of improving these problems, the inventors have developed a new concept coating solution in Korean Patent Application No. 01-30,804. This concept is a product designed to show hydrophilicity slowly and uses the term oil repellency to give hydrophilicity and differentiation. It is a method of imparting hydrophilicity by forming a water layer on the coated surface to continuously flow water. The coating composition developed by the present inventors is a combination of inorganic colloids, which are nanomaterials, and thermoplastic resins made of organic-inorganic hybrid materials in order to easily adhere these materials to a substrate. These coating composition products provide excellent substrate adhesion, long term durability and transparency. However, if the surface treatment is not performed, the coating surface may become dirty due to natural phenomena, that is, another worm-shaped water layer formed by the flow of water droplets and water droplets.

The above methods can be summarized in two main ways. Firstly, coating compositions that exhibit hydrophilicity as an organic material (inorganic material as a durable enhancing additive) have a very high degree of hydrophilicity and have a very high hydrophilicity, which is convenient for use but weak in durability. Problems with long-term use. On the other hand, since the coating composition using hydrophilic properties as an inorganic material and an organic material as a binder is excellent in durability, it is suitable for products requiring long-term use such as agricultural films, but has a disadvantage in that transparency remains due to the shape of the earthworm caused by water droplets.

Korean Utility Model No. 20-179426 shows a product that embosses polyolefin resin to improve tensile strength, durability, and bond resistance, as well as increase the usability. These products do not exhibit hydrophilicity because the substrate has a hydrophobic surface.

Accordingly, the present invention is to solve the problems of the coating product and to provide a coating product with improved oil repellency by treating the surface of the coating product, such as a film on which the coating layer is formed by a mechanical method.

The inventors of the present invention to solve the above problems, glass, polyolefin resin, polyvinyl chloride (PVC) resin, polycarbonate (PC) resin, polyethylene terephthalate (PET) resin, polystyrene resin, acetate resin, polyolefin-poly chloride Products coated with hydrophilic materials on vinyl copolymer resins, ABS resins, polyester resins or polymethylmethacrylate resins have a concave-convex shape to increase the oil repellency and provide a more transparent coating surface in a humid environment. The purpose is to.

1 is a perspective view showing an embodiment of the present invention

2 is an enlarged side cutaway view of FIG.

3 is a plan view of the surface of one embodiment of the present invention

4 is an enlarged side cutaway view of FIG.

5 is a manufacturing process chart of the coating film formed with the unevenness of the present invention

Explanation of symbols on the main parts of the drawings

1: film 2: coating layer

11, 18: roll 12, 14, 17: roller 13: coating chamber

15: drying chamber 16: surface irregularity treatment chamber

The present invention for achieving the above object is as shown in the accompanying drawings 1 to 2, 3, the base material 1 is glass, polyolefin resin, polyvinyl chloride (PVC) resin, polycarbonate (PC) resin, polyethylene tere By roughening the surface of the product 2 coated with a hydrophilic coating agent on phthalate (PET) resin, polystyrene resin, acetate resin, polyolefin-polyvinyl chloride copolymer resin, ABS resin, polyester resin or polymethyl methacrylate resin Obtained.

The present invention provides a coated product in which irregularities are formed in a coating layer in a product treated with a hydrophilic coating agent on a surface of a substrate.

In addition, the subject innovation is glass, polyolefin resin, polyvinyl chloride (PVC) resin, polycarbonate (PC) resin, polyethylene terephthalate (PET) resin, polystyrene resin, acetate resin, polyolefin-polyvinyl chloride copolymer as the substrate The present invention provides a coating product having irregularities formed on a coating layer, which is a resin, an ABS resin, a polyester resin, or a polymethyl methacrylate resin or a copolymer thereof.

In addition, the present invention provides a coating product having irregularities formed in the coating layer, characterized in that the organic material and the inorganic material is blended as the hydrophilic coating agent.

In addition, the present invention provides a coating product having a concave-convex shape on the coating layer, characterized in that the concave-convex shape is circular, hemispherical, oval, elliptic hemispherical, polygonal, polygonal pyramidal, checkered, comb-shaped or linear.

In addition, the unevenness is characterized in that formed on all or part of the upper surface of the coating layer.

Furthermore, the present invention provides a coating product having irregularities formed on the coating layer, wherein the coating layer has a thickness of 0.1 to 10 μm and an irregular pattern spacing is 0.1 to 20 mm.

In this case, the uneven shape is most ideally formed entirely on the upper surface of the hydrophilic coating layer 2, but may be partially formed in some places as necessary. In addition, as shown in the side (FIG. 2), when the hydrophilic coating layer 2 is divided into an upper layer and a lower layer, it is most ideal in terms of durability in terms of durability, but it can be treated to the lower layer or the substrate surface as necessary.

The concave-convex shape of the present invention configured as described above is circular, hemispherical, oval, elliptic hemispherical, polygonal (triangular, square, pentagonal, hexagonal, etc.), polygonal pyramid (triangular pyramid, square pyramid, etc.), checkerboard It can be formed in various forms such as a comb pattern and a linear shape.

The hydrophilic coating agent coated on the substrate is not particularly limited, but a coating composition exhibiting hydrophilicity lately (which takes a few minutes to reach a surface with water droplets) and exhibits hydrophilicity mainly using inorganic materials is preferable. Can be. For example, the coating composition disclosed in Korean Patent Application No. 01-30804 or Japanese Patent Application Nos. 93-204,237, 94-63,074, and 95-58,829 developed by the present inventors may be mentioned. The hydrophilic coating composition mainly using the organic material has a very high degree of hydrophilicity and thus shows super hydrophilicity in which water droplets do not form. Therefore, the application of the present invention may not be suitable. However, even if the coating composition is made of an organic material, when the inorganic material is added to increase the durability, the hydrophilicity is late, so that water droplets are formed, and thus the surface treatment shown in the present invention is more effective.

That is, the constitution of the present invention is excellent in durability, but hydrophilic properties are slow, or when applied to the coating composition using an organic material as a binder in the inorganic material can be obtained a more desirable effect.

On the other hand, it is more economical when the coating process and the surface treatment process is made in a continuous process to effectively perform the surface treatment of the coating film coated on the substrate.

As a method of forming the irregularities on the surface, the coating film may be made to pass through the coating film on the metal surface or the plastic surface on which the fine concavo-convex pattern is formed, or by pressing the coating film (product) with plastic or metal having the concave-convex pattern on the surface.

Among these processes, the former method using a roller is more effective in terms of productivity or surface effect. The roller is formed with an uneven or embossed irregularities to form embossing. It is also possible to form irregularities by rubbing the coated surface using a brush. The method used in this form includes an air-knife method, gravure method, reverse roll method, kiss roll method, bar coating method, doctor blade method, brushing method.

Looking at the overall manufacturing process of the present invention, the substrate is a polyolefin resin or a polyvinyl chloride resin, these copolymers or polyethylene terephthalate resins are used a lot, in particular polyolefin resin and polyvinyl chloride resin in terms of flexibility of the substrate. As shown in FIG. 5, the hydrophilic coating product is coated on both sides or one side of the substrate wound on the roll 11 by the coating method described above in the hydrophilic coating chamber 13 via the roller 12, and then the drying chamber 15. Heat at 50 to 100 ° C.). The surface coated in the surface concave-convex treatment chamber 16 is made into a concave-convex shape and wound on the roll 18 again through the roller 17. The rollers 12, 14, and 17 during these processes not only facilitate the movement of the film, but also serve to maintain the film taut during coating or surface uneven treatment to help uniform coating and surface treatment.

In the hydrophilic coating product of the present invention, since the degree of flexibility varies depending on the substrate, it is preferable to adjust the substrate thickness in the range of about 0.03 to 1 mm, particularly preferably in the range of 0.05 to 0.3 mm.

The narrower the gap between the uneven patterns, the better the remarkability, but less than 0.1mm, the product is difficult to produce the disadvantages of economic efficiency, and more than 20㎜ has the disadvantage of low retraction due to the distance too far.

In addition, when the thickness of the coating layer is less than 0.1 μm, the above concave-convex shape cannot be obtained as well as the durability is weak, and the coating substrate is damaged, thereby shortening the film life. If it is 10 μm or more, the film becomes hard and there is a disadvantage in that durability occurs because of a fine crack in the coating layer.

As such, the present invention has the advantage that the structure is very simple, not only the production cost is low, but also the manufacturing process is simple and mass production is possible. It is also a very useful design that greatly improves oil repellency compared to products without surface treatment.

The present invention is glass, polyolefin resin, polyvinyl chloride (PVC) resin, polycarbonate (PC) resin, polyethylene terephthalate (PET) resin, polystyrene resin, acetate resin, polyolefin-polyvinyl chloride copolymer resin, ABS resin, In order to improve the oil repellency of products coated with a hydrophilic material (2) on a substrate (1) such as a polyester resin or polymethyl methacrylate resin, the surface of the coating is treated in an uneven form so that the substrate looks more transparent. One very useful design.

Claims (6)

A coating product in which a hydrophilic coating agent is treated on a surface of a substrate, wherein the coating product is formed with irregularities in the coating layer. The method of claim 1, wherein the substrate is glass, polyolefin resin, polyvinyl chloride (PVC) resin, polycarbonate (PC) resin, polyethylene terephthalate (PET) resin, polystyrene resin, acetate resin, polyolefin-polyvinyl chloride air Coating product with irregularities formed in the coating layer, characterized in that the copolymer resin, ABS resin, polyester resin or polymethyl methacrylate resin or a copolymer thereof. The coated product according to claim 1 or 2, wherein the hydrophilic coating agent is a mixture of organic and inorganic substances. The coating product according to claim 1, wherein the irregularities are circular, hemispherical, elliptical, elliptic hemispherical, polygonal, polygonal pyramidal, checkered, comb-shaped or linear. The coated product according to claim 4, wherein the irregularities are formed on all or a part of the upper surface of the coating layer. The coating product according to claim 1 or 4, wherein the coating layer has a thickness of 0.1 to 10 µm and an uneven pattern spacing is 0.1 to 20 mm.