TWI289208B - Nano-composite coating for anti-fingerprint - Google Patents

Abstract

The present invention relates to a nano-composite coating for anti-fingerprint. The nano-composite coating, which is to be coated on a substrate, includes a hydrophobic nano-composite coating, an oleophobic nano-composite coating or a super-amphiphobic nano-composite material coating. The hydrophobic nano-composite coating includes polymer nano-fiber, organic silicon based nano-material and super-hydrophobic material. A thickness of the coating is less than 1 micrometer, preferably in the range from 0.1 to 0.5 micrometer. The present invention is friendly to environment and human being due to the absence of Cd and acid-treating or alkaline-treating.

Description

1289208 If there is a chemical in this case _ 'Lei Si _ mark _ after the chemical formula IX, the invention description: [Technical field of the invention] 'Specially related to the invention is based on the surface of the mobile phone, the material shell resistance to the coating Chromium-containing, environmentally friendly surface anti-fingerprint coating. Bandits [First two technologies] In recent years, consumers are increasingly demanding 3C electronic products for mobile phones, personal computers (PCs), notebooks, and personal digital assistants. In addition to having more and more powerful functions, it also requires high demands on the outer casing of the product. For example, the shell is anti-jamming, anti-jamming, and turning, and recently the technical requirements for anti-fingerprinting (anti>6ngerprint). In the conventional technology, 'early anti-fingerprinting is generally applied to the zinc on the surface of the zinc layer to form a chromate layer and a special layer. As shown in the first figure, it is proposed by Akira Matsuda et al., an RZ-F bell zinc steel which is formed by galvanizing layer 12 having a thickness of about 3 μm after the surface of the unrecorded steel 11 is cleaned and the galvanizing step is completed. Then, the chromium is treated by chromate, and finally the resin is plated by rolling to obtain a chromate layer 13 having a thickness κ of 0.01 to 01 μm and a resin layer having a thickness h3 of 0.3 to 1.0 μm. After this treatment, the zinc-zinc steel has strong anti-corrosion property and excellent anti-fingerprinting performance. For details, please refer to "〇^〇^ plus ^

Electrogalvanized Steel Sheet “RIVER ZINC F” with Anti-fingerprint Property and High Corrosion Resistance”, Kawasaki Steel Technical Report No. 12, July 1985 〇 ' 'The above method requires chromate treatment, which is very polluting to the environment. Therefore, To avoid pollution to the environment, people began to study various alternative products. For example, after the step of mineral zinc on the surface of stainless steel, phosphate treatment and special anti-fingerprint resin layer were applied. However, the metal surface obtained by this treatment method is easy to produce. Corrosion, anti-corrosion performance after long-term use. U.S. Patent No. 6,736,908, issued May 18, 2004, discloses a metal surface treatment liquid, 1289208 which contains special organic tree vinegar, soluble hunger compound, and soluble metal. a compound containing at least one metal element of Zr, Τι 'Mo' W, Μη and Ce. The metal surface treated by the treatment liquid has good corrosion resistance, test resistance and anti-fingerprint property, and does not contain chrome metal. , no environmental pollution problems. According to the organic tree, the organic tree vinegar is not easy to prepare, and the treatment liquid is processed on the metal surface, while the mobile phone and the computer casing are often made of non-metal materials, and the surface of the outer shell of such materials is still There is no suitable treatment method. Fourthly, it is necessary to provide a treatment coating for the surface treatment of 3C electronic products to achieve anti-fingerprinting and environmental pollution. [Contents] To solve the prior art The anti-fingerprint coating contains heavy metal chromium which is seriously polluting the environment, needs to be acid treated or treated - or is not suitable for non-metal surface, etc., and an object of the present invention is to provide an anti-fingerprint coating which does not require acid or Alkali treatment is advantageous for the body of the prison; and can be applied to metal or non-metal surfaces. For the purpose of the present invention, the present invention provides a surface anti-fingerprint coating comprising: The coating is a water-based nano material coating on the substrate surface, an oil-repellent nano material coating or a super-double hydrophobic material coating, wherein the hydrophobic nano material coating comprises a polymer nanofiber, The machine nano-fiber comprises a polyacrylonitrile, a material, a cigarette, a smectite, a poly- succinimide, and a polyethylene sulphide. The nano-coating material comprises a fluorine-containing Wei, sulfur-containing Wei or organic stone polymer nano-material. The super-sparse tree material comprises silk mineral water nano-fiber. Among them, the ό玄超双疏奈米 material coating includes super-double sparse Array of carbon nanotube film. ^ 'The surface of the heterogeneous layer, the sparse line of Nai County or the ultra-double-silk material coating has a dryness of 1 micro-correction, preferably αι~α5鄕. 2 In addition, the anti-fingerprint coating of the present invention is directly coated with a hydrophobic or oleophobic coating = the surface of the limb' § the skin of the finger is saturated with water or oil, and the surface of the object is not fine. The characteristics of the two-pattern coating make the water collapse or oil collapse unable to adhere to the object table*, thereby preventing the right side=face from leaving fingerprints or stains. At the same time, the object is cleaned, and it is dust-proof and anti-bacterial. The invention does not contain heavy metal, does not require acid or test, and is therefore beneficial to environmental protection and human health. 1289208 [Embodiment] The fingerprint is left on the surface of the object. The reason is that people's fingers adhere to the surface of the skin with oil, sweat, water and other dirt. Therefore, the user or the operator often leaves fingerprints when contacting the surface of the object. Or finger pattern. The invention adopts the oleophobic and hydrophobic coating applied to the surface of the object, and can fundamentally solve the problem of fingerprinting on the surface of the object. ^ Does not contain heavy metals such as chromium, acid and the like which are harmful to the environment. The embodiments of the present invention will be specifically described below with reference to the accompanying drawings. Referring to the second figure, the first embodiment of the present invention applies the anti-fingerprint coating 23 directly to the non-metal substrate 21 to form an anti-pattern coating structure. The non-metallic substrate 21 may include plastic, glass, ceramic, polymer, etc., which are commonly used in the manufacture of electronic devices such as mobile phones, computers, digital cameras, and pDA. The P-side fingerprint coating 23 includes an oleophobic, hydrophobic nanomaterial coating and a super double sparse material coating. The thickness of the anti-fingerprint coating 23 is generally less than 1 micron, preferably 0. 5 micron. Referring to the third figure, the second embodiment of the present invention applies an anti-fingerprint coating to a steel substrate, including a stainless steel substrate 3, a 32-layer layer 32, and an anti-fingerprint coating 33. The galvanized layer 32 protects the stainless steel from corrosion and extends the life of the steel. The anti-fingerprint coating 33 comprises an oleophobic, hydrophobic nanomaterial coating and a super double sparse material coating. The thickness of the anti-finger, grain coating 33 is generally less than i microns, preferably = 〇 1-0.5 microns. < The material of the oleophobic and hydrophobic nano material coating comprises: polymer nanofiber, for example, polymer nanometer made of polyacrylonitrile, polyolefin, polyester, poly-an, polyvinyl alcohol. Fiber; organic stone Xi Nai coating, including fluorine-containing stone oxide, sulfur-containing stone or organic stone polymer, etc., is based on diterpene base oxygen burning, Jia Qi gas Wei, phenyl chloride stone burning, etc. Prepared as raw materials; superhydrophobic coating materials, including non-hydrophobic rice. The double-nano-nano material coating of the ship has both ultra-sparse and super-oleophobic nano-material coatings, such as super-double-sparing array carbon nanotube film. Polymer naphthene maintenance machine _• in general. # When the surface of the material is in contact, due to the presence of water molecules near the junction, it is also affected by the cohesive force F1 and the adhesion force F2, and the contact angle 0 between the surface of the water and the hydrophobic material is proportional to F1/F2. Since the cohesion of the water molecules is constant, the adhesion between the I-tree material and the water is smaller, and the contact angle 0 is larger. The adhesion between the material and the water is determined by the chemical composition of the material. The lower the chemical surface energy, the lower the adhesion to water. Since the g-rice fiber and the organic barium nano-coating can be very low, the material has good hydrophobic properties. The super-hydrophobic material means that the contact angle between water and its surface is greater than 150. Material. 1289208 Super double sapphire material is a nano-material with both hydrophobic and oleophobic properties. Using nanometer chemical methods from the bottom to the 2nd to the molecule and 1 molecule to the aggregate, it is possible to build a k-scale on a specific surface to find the micro-inter- _ (such as & fine paste). Stealing in the low size of the nanometer = ^ surface can make the adsorption of gas bribes exist, so in the macro table is equivalent to a layer of stable gas, the film L makes the mechanical water can not be the surface of the new material, thus the sharp material Ship often double sparse & At this time, the water droplets or oil droplets and the interface fineness tend to be the maximum. 4 The above description has indeed met the requirements of the invention patent and has filed a patent application according to law. However, the description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application in this case. Equivalent modifications or variations made by persons skilled in the art in accordance with the spirit of the present invention are intended to be included in the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a schematic diagram of the anti-fingerprint coating of the zinc-stained stainless steel surface of the prior art; the second figure is a schematic diagram of the anti-fingerprint coating applied to the non-multi-genus surface of the first embodiment of the present invention; A schematic view of a second embodiment of the present invention for applying an anti-fingerprint coating to a surface of a galvanized stainless steel. [Main component symbol description] Base material Zinc layer 2 Bu 31 Anti-fingerprint coating 23,33 32

Claims (1)

Ϊ289208 X. Patent application scope: 1—A surface anti-fingerprint coating comprising: a hydrophobic nanomaterial coating formed on the surface of the substrate to be coated, an oleophobic nanomaterial coating or a super double-sparse nanometer Material coating. 2. The surface anti-fingerprint coating of claim 2, wherein the hydrophobic nanomaterial coating comprises a polymer nanofiber, an organic chopped nano coating, and a superhydrophobic material. 3. The surface anti-fingerprint coating according to claim 2, wherein the polymer nanofiber comprises polyacrylonitrile, polyolefin, polyester, poly- ugly amine, polyvinyl alcohol as raw material. Polymer nanofibers. 4. The surface anti-fingerprint coating as described in claim 2, wherein the organic stone coating comprises fluorine-containing alkane, sulfur-containing stone or organic stone polymer nano material. 5. The surface anti-fingerprint coating as described in claim 2, wherein the superhydrophobic material comprises fluorine-free superhydrophobic nanofibers. 6. The surface anti-fingerprint coating of claim i, wherein the super-double-sparse nanomaterial layer comprises a super-double-sparse array of carbon nanotube film. 7. The surface anti-fingerprint coating as described in the scope of claim 2, the improvement being the thickness of the hydrophobic nanomaterial coating, the oleophobic nanomaterial coating or the super double sparse nanomaterial coating. It is 1 micron or less. 8. The surface anti-fingerprint coating as described in claim 7 is improved in thickness of the hydrophobic nanomaterial coating, the oleophobic nanomaterial coating or the super double hydrophobic nanomaterial coating. It is 〇·1~〇·5 microns.