TW201323204A - Housing of electronic apparatus and processing method thereof - Google Patents

Abstract

A housing of an electronic apparatus is disclosed. The housing comprises a base and a coating. The base is manufactured with carbon fiber and comprises an outside surface. The coating is formed on the outside surface of the base, wherein the coating is a saturated solution formed with 60v/v% alcohols added Sodium Bicarbonate. An alkaline environment is formed by the coating to prevent or process a chalking produced on the outside surface of the base.

Description

Electronic device housing and processing method thereof

The invention relates to an electronic device housing, in particular to an electronic device housing capable of preventing or solving the whitening phenomenon of the carbon fiber housing and a processing method thereof.

The application of carbon fiber materials in the technology industry or electronic products has become a trend. Because carbon fiber materials have the characteristics of light and hard texture, abrasion resistance, heat resistance and corrosion resistance, carbon fiber materials have become the shell of electronic products. One of the commonly used materials. At present, the carbon fiber material is mainly a composite material composed of a carbon fiber base material combined with an epoxy resin, and in the manufacturing process, in order to reduce the cost or impart other characteristics to the composite material, a filler or an additive such as carbonic acid is usually added to the resin. Calcium, aluminum hydroxide, silicates, etc., to improve the physical or mechanical properties of the resin.

However, in the process of solidification molding, coating or packaging of the carbon fiber casing, if a pollutant is infiltrated into the carbon fiber or the resin, the pollutant may chemically react with the aforementioned filler or additive, which may easily cause chalking of the carbon fiber casing. For example, the air often contains acidic substances, such as acetic acid (CH ₃ COOH). Acidic substances such as acetic acid will be acidified with calcium carbonate (CaCO ₃ ) in the case where the carbon fiber shell cannot completely block air and moisture. The white crystal form of calcium acetate (Ca(CH ₃ COO) ₂ ) is formed, and the chemical reaction formula is as follows:

CaCO ₃ +2CH ₃ COOH→Ca(CH ₃ COO) ₂ +H ₂ CO ₃ (1)

When the carbon fiber shell is in an acidic environment to form calcium acetate, the aforementioned whitening phenomenon may occur, which will affect the structural appearance uniformity of the carbon fiber shell.

Therefore, how to solve the whitening phenomenon produced by the carbon fiber shell is a subject worthy of study.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide an electronic device housing that prevents or resolves the whitening of a carbon fiber housing.

To achieve the above object, the electronic device housing of the present invention includes a substrate and a coating. The substrate is made of a carbon fiber material, and the substrate comprises an outer surface; the coating is formed on the outer surface of the substrate, wherein the coating is formed by dissolving sodium hydrogencarbonate in an alcohol solution having a concentration of about 60 v/v% or more. saturated solution. An alkaline environment can be formed by the coating property to prevent whitening of the substrate when it encounters an acidic substance or to improve the whitening phenomenon that the substrate has formed.

In an embodiment of the invention, the electronic device housing further includes a protective layer attached to the coating such that the coating maintains an alkaline environment between the substrate and the protective layer.

In an embodiment of the present invention, the alcohol solution is an isopropyl alcohol solution or an ethanol solution, wherein a preferred concentration of the alcohol solution is between about 70 v/v% and 80 v/v%, and the optimal concentration is about 75v/v%.

The present invention further includes a method of processing the electronic device housing, the method comprising the steps of: providing a substrate of a carbon fiber material; and forming a coating on the outer surface of the substrate, wherein the coating is to dissolve sodium hydrogencarbonate in the concentration A saturated solution formed in an alcohol solution of about 60 v/v% or more.

In an embodiment of the invention, the method of processing the electronic device housing further comprises the step of: attaching a protective layer to the coating.

In order to enable the reviewing committee to better understand the technical contents of the present invention, the preferred embodiments are described below.

Please refer to FIG. 1 , which is a schematic structural view of an electronic device casing 1 of the present invention. In an embodiment of the present invention, the electronic device housing 1 can be applied to a portable computer, but can also be applied to other electronic devices having an external housing, such as a smart phone, a personal digital assistant, a digital camera, etc. It is not limited to this embodiment.

As shown in FIG. 1, the electronic device housing 1 of the present invention includes a substrate 10 and a coating 20. The substrate 10 is made of a carbon fiber material, and the carbon fiber material referred to herein is mainly a composite material including a carbon fiber base material and a resin, and a filler or an additive such as calcium carbonate, aluminum hydroxide, or the like may be added to the composite material. To improve the properties of the composite; the substrate 10 includes an outer surface 11.

The coating layer 20 is formed on the outer surface 11 of the substrate 10, wherein the coating layer 20 is a saturated solution formed by dissolving sodium hydrogencarbonate in an alcohol solution having a concentration of about 60 v/v% or more by volume. It is formed on the outer surface 11 of the substrate 10 by spraying or coating. The saturated solution is prepared by using water as a solvent and alcohol as a solute, and mixing the corresponding volume ratio of water and alcohol according to the set concentration to form an alcohol solution having a concentration of about 60 v/v% or more, and then adding sodium hydrogencarbonate. (NaHCO ₃ ) is dissolved in the prepared alcohol solution to form a saturated solution. In an embodiment of the present invention, the alcohol solution may be an isopropyl alcohol solution or an ethanol solution, but may be replaced by other alcohol solutions having similar properties, and is not limited to the embodiment.

At present, it is inferred that carbon fiber material will produce whitening phenomenon. The reason is that the base material 10 is in the process of curing, coating or packaging, and the calcium carbonate contained in the carbon fiber material itself is formed with the external acidic substance as in the prior art (1). The acidification reaction is followed by the formation of white crystal calcium acetate. Therefore, after the substrate 10 has been whitened, the substrate 10 is wetted and alkalized by the coating 20, so that the sodium bicarbonate contained in the coating 20 reacts with calcium acetate to cause calcium acetate. Reduction to calcium carbonate and the formation of sodium acetate (CH ₃ COONa), the chemical reaction formula is as follows:

Ca(CH ₃ COO) ₂ +NaHCO ₃ →2CH ₃ COONa+CaCO ₃ (2)

Since sodium acetate is hygroscopic and soluble in water and alcohol, the resulting sodium acetate can be taken out by the coating 20 to achieve the effect of removing whitening.

When the substrate 10 has not been whitened, the substrate 10 can be protected by the characteristics of the coating 20 to protect the substrate 10, so that the substrate 10 can be acid or alkali when it encounters an acidic substance or is in an acidic environment. And the effect.

In an embodiment of the present invention, after repeated tests to confirm the treatment state of the coating 20 using different concentrations of the alcohol solution, it is found that the preferred concentration of the alcohol solution used is about 70 v/v% to 80 v/ Between v%, and its optimum concentration is about 75v/v%, a fast and good whitening effect can be achieved.

2 is a schematic structural view of another embodiment of the electronic device housing 1a of the present invention. As shown in FIG. 2, in another embodiment of the present invention, the electronic device housing 1a further includes a protective layer 30 attached to the coating 20. Since the coating 20 itself is mainly an alcohol solution, if the electronic device housing 1a is placed under normal environmental conditions, the alcohol solution is volatilized and evaporated to cause the coating 20 to lose its original characteristics, so that the coating layer 30 is provided. The layer 20 is isolated so that the coating 20 remains in an alkaline environment between the substrate 10 and the protective layer 30. In an embodiment of the present invention, the protective layer 30 may be a PET film, but the protective layer 30 may be replaced by other articles having similar isolation effects, and the invention is not limited thereto.

Please refer to FIG. 3, which is a flow chart of a method for processing an electronic device housing of the present invention. As shown in FIG. 3, the processing method of the electronic device housing of the present invention includes steps S31 to S32. Hereinafter, each step of the processing method of the electronic device casing of the present invention will be described in detail with reference to FIGS. 1 and 2.

Step S31: providing a substrate 10 of a carbon fiber material. In order to perform the processing method of the electronic device casing of the present invention, first, a substrate 10 made of a carbon fiber material, which may be a substrate 10 of an electronic device casing 1 or 1a that has not been produced or has been whitened, is provided. And the substrate 10 includes an outer surface 11.

Step S32: forming a coating layer 20 on the outer surface of the substrate 10, wherein the coating layer is a saturated solution formed by dissolving sodium hydrogencarbonate in an alcohol solution having a concentration of about 60 v/v% or more. As described above, an alcohol solution having a concentration of about 60 v/v% or more is prepared by using an alcohol such as isopropyl alcohol or ethanol in proportion to water, and then sodium hydrogencarbonate is added to prepare a saturated solution of the alcohol solution; Thereafter, the saturated solution is sprayed or coated to form a coating layer 20 on the outer surface of the substrate 10 to wet the substrate and alkalinize the substrate 10 by the coating 20. When the substrate 10 is whitened by the formation of calcium acetate, the reduction reaction can be carried out by sodium bicarbonate to reduce the whitening phenomenon. It should be noted that, in view of the volatility of the alcohol solution, in the state where the coating layer 20 is formed on the substrate 10, it is preferable to leave it in a non-volatile environment for a certain period of time for the coating layer 20 and the substrate. The substance such as calcium acetate on the 10 is reacted to achieve a better effect.

In another embodiment of the processing method of the electronic device housing of the present invention, step S33 is further included after step S32.

Step S33: A protective layer 30 is applied on the coating 20. As shown in FIG. 2, if the non-volatile environment cannot be provided to place the electronic device casing 1a after the above treatment, in order to prevent the coating 20 from losing its original characteristics after volatilization, the protective layer 30 can be applied by coating. The layer 20 is formed to maintain the alkaline environment formed between the substrate 10 and the protective layer 30 while providing a barrier effect to protect the substrate 10 from direct contact with acidic substances in the air, thereby reducing the chance of whitening. .

By this design, the invention can effectively prevent whitening of the carbon fiber casing of the electronic device, or correspondingly deal with the carbon fiber casing which has been whitened, so that the electronic device can maintain its overall appearance during manufacturing or shipping. consistency.

In summary, the present invention is a breakthrough in terms of its purpose, means and efficacy, and it is different from the characteristics of the prior art. It is a great breakthrough for the reviewer to ask for an early patent, and to benefit the society. Debian. It is to be noted that the above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the scope of the invention. Modifications and variations of the embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. The scope of protection of the present invention should be as described in the scope of the patent application to be described later.

1, 1a. . . Electronic device housing body

10. . . Substrate

11. . . The outer surface

20. . . coating

30. . . The protective layer

1 is a schematic structural view of a housing of an electronic device of the present invention.

2 is a schematic structural view of another embodiment of the electronic device housing of the present invention.

3 is a flow chart of a method of processing an electronic device housing of the present invention.

1. . . Electronic device housing

10. . . Substrate

11. . . The outer surface

20. . . coating

Claims (10)

An electronic device housing comprising: a substrate made of a carbon fiber material, the substrate comprising an outer surface; and a coating formed on the outer surface of the substrate, wherein the coating is A saturated solution of sodium bicarbonate dissolved in an alcohol solution having a concentration of about 60 v/v% or more. The electronic device housing of claim 1, further comprising a protective layer attached to the coating. The electronic device casing according to claim 1 or 2, wherein the alcohol solution is an isopropanol solution or an ethanol solution. The electronic device housing of claim 3, wherein the preferred concentration of the alcohol solution is between about 70 v/v% and 80 v/v%, and the optimum concentration is about 75 v/v%. The electronic device housing of claim 2, wherein the protective layer is a PET film. A method for processing an electronic device housing, comprising the steps of: providing a substrate of a carbon fiber material; and forming a coating on an outer surface of the substrate, wherein the coating dissolves sodium bicarbonate at a concentration of about A saturated solution formed in an alcohol solution of 60 v/v% or more. The method for processing an electronic device housing according to claim 6, further comprising the step of: attaching a protective layer to the coating. The method for processing an electronic device housing according to the above-mentioned item 6, wherein the alcohol solution is an isopropanol solution or an ethanol solution. The method for processing an electronic device casing according to claim 8, wherein the preferred concentration of the alcohol solution is between about 70 v/v% and 80 v/v%, and the optimum concentration is about 75 v/ v%. The method of processing an electronic device housing according to claim 6, wherein the coating is formed on the outer surface of the substrate by spraying or coating.