JP2007098955A - Article taking account of surface abrasion by contact friction with another object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article whose substrate surface having irregularity and a coating on its substrate surface demonstrate outstanding adhesion-preventing, antifouling, oil-repellent properties, etc. to external materials. <P>SOLUTION: Ceramic particles 3 are fixed as uniformly as possible or at a desired distribution density by Teflon(R)-containing nickel plating on the surface of a substrate 1, and Teflon(R) particles in a Teflon(R)-containing nickel coat 3 are fixed too; wherein the substrate 1 comprises stainless steel or an equivalent material that allows a plating, such as Teflon(R) containing nickel plating, on its surface. Tops of ceramic particles 2 project in a suitable density from the surface of the Teflon(R)-containing nickel coat 3 and form a proper irregularity, thereby achieving abrasion resistance, releasability (lubricity) and conductivity simultaneously. the result allows demonstrating outstanding adhesion preventing, antifouling, oil-repelling properties and so on. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an article in which unevenness and a film are formed on a substrate surface. More specifically, the present invention relates to an article that can form fine irregularities on the surface of a substrate to exhibit anti-adhesion, antifouling, and wear resistance of external substances.

  Conventionally, various proposals have been made regarding articles that can form fine irregularities on the surface of a substrate to exhibit anti-adhesion and antifouling properties of external substances.

Among such articles, there are some which have extremely strict requirements such as having at least three characteristics of wear resistance, releasability (already lubricated), and electrical conductivity on the surface.
JP-A-8-12151

  Examples of materials for obtaining wear resistance include ceramics and hard chrome, but these do not sufficiently satisfy the requirements for releasability.

  As for releasability (lubricity), Teflon (registered trademark) can be cited as an example. However, since there is no wear resistance, in order to have both wear resistance and releasability, ceramic and mold release materials are currently used. Although combined articles are used, ceramics and mold release agents such as those described above are generally not electrically conductive. In the following, when referring to Teflon (registered trademark), it is referred to as a fluororesin if necessary.

  Without electricity, static electricity is generated by contact with other articles on the surface, and dust, dust, etc. are collected and adhered. If the surface cannot be easily cleaned, such an article will eventually have a short life and frequent replacement.

  An object of the present technology is to provide an article having a surface property that can solve such conventional problems at once.

  The article according to the present invention is an article considering that the surface is worn by contact friction with another object, and the hard or super hard particles are dispersed on the surface of the substrate, and at least a part of the dispersed particles. It has a film formed by forming a plating layer on the surface of the substrate so as to cover the surface.

  In the article according to the present invention, the diameter of particles dispersed on the surface of the substrate may not be constant.

  Further, in the article according to the present invention, at least one of the distribution density of the particles, the distribution density distribution, the particle diameter, and the particle diameter distribution on the surface of the substrate may be not constant.

  Further, in the article according to the present invention, at least one of the particle distribution density, the distribution density distribution, the particle diameter, and the particle diameter distribution on the surface of the base material is not constant, and the non-constant density and / or distribution It can also be varied locally on the substrate surface.

  In the article according to the present invention, all constituent substances or constituent substances other than the particles may be electrically conductive.

  Further, in the article according to the present invention, the plating layer can be formed by electroless nickel plating or electro nickel plating.

  In the article according to the present invention, the plating layer may be formed by electroless nickel composite plating or electronickel composite plating.

  In the article according to the present invention, the unevenness and film on the substrate surface exhibit excellent anti-adhesiveness, antifouling properties, abrasion resistance, oil repellency, water repellency and the like for external substances.

  The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings.

  FIG. 1 is an enlarged cross-sectional view of an embodiment of an article according to the present invention, in which 1 is a base material, 2 is a ceramic particle which is an example of hard particles or ultrahard particles, and 3 is a fluorine resin-containing nickel coating . In the article of the present invention, the ceramic particles 3 are fixed to the surface of the substrate 1 by the fluorine resin-containing nickel plating as uniformly as possible or with a desired distribution density, and at the same time, the fluorine resin particles in the fluorine resin-containing nickel coating 3 are also fixed. Thus, wear resistance, deplasticity (lubricity), and electrical conductivity can be obtained at the same time.

  The substrate 1 is made of an equivalent material that can be plated on the surface with a metal such as stainless steel or a fluorine resin-containing nickel plating. Although it is shown in a flat plate shape in the figure, it is of course possible to have other shapes, particularly a surface shape. It is not limited to the illustrated example.

  The ceramic particles 2 are dispersed on such a substrate 1 uniformly or at an appropriate or desired plane density. The spraying method may adopt various known methods, and is not limited to any spraying method.

  The diameter of the ceramic particles 2 to be dispersed may be selected as constant as possible, or may be used without selection so that it is not constant. Hard particles or ultra-hard particles such as ceramics are generally marketed in a form having a certain distribution (mostly a normal distribution) around a certain diameter value. Therefore, for example, an appropriate value can be adopted depending on the application, such as using a median value of 10 μm or using a median value of 20 μm.

  Further, the spray density of the ceramic particles 2 on the surface of the substrate 1 may be as constant as possible or not constant. For example, the spray density may be locally changed on the surface of the substrate 1. It is also possible to make the spray density not constant within the range of the part.

  Next, the fluororesin-containing nickel plating is applied to the surface of the base material 1 on which the ceramic particles 2 are dispersed. As for plating, any of electroless nickel plating, electronickel plating, electroless nickel composite plating, and electronickel composite plating can be employed, or a combination of these can be used. Various other known plating methods can also be employed.

  Then, as shown in FIG. 1, the top of the ceramic particles 2 protrudes on the surface of the fluororesin-containing nickel coating 3 with an appropriate density, and can exhibit excellent anti-adhesiveness, antifouling properties, oil repellency and the like. Unevenness is formed. That is, wear resistance is imparted to the base material 1 by the ceramic particles 2, and the fluororesin-containing nickel coating 3 that is present in the gaps between the ceramic particles 2, that is, the lubricating coating is protected. In addition, all the constituent materials or components other than the ceramic particles 2 can be made conductive so that static electricity generated when another article contacts the surface can be easily released. It is possible to eliminate or reduce the degree of collecting and the like, and as a result, the replacement frequency can be reduced and the life can be extended.

  Further, as described above, not only the ceramic particles 2 whose center value is fixed to 10 μm, 20 μm, or the like is used, but the particle size of the ceramic particles 2 is 10 μm from the end of the substrate 1 to 100 mm, for example. It is also possible to adopt a variable distribution such as that having a center value of 15 mm from 100 mm to 200 mm. Furthermore, as for the distribution density of the ceramic particles 2, for example, an approximate number of particles per square centimeter may be determined as an appropriate number, and from the end of the substrate 1 to 100 mm as in the case of the above-mentioned particle size. The approximate number of ceramic particles 2 per square centimeter is set to 5000, and from 100 mm to 200 mm is set to 3000, and this can also adopt a variable distribution. Thus, by changing the distribution in various ways, it is possible to give functional changes such as differences in properties to the difference in density depending on the part.

  FIG. 2 is a diagram simulating a cross-sectional SEM observation photograph showing an example of an experimental result conducted by the inventors of the present application. For the observation, a Hitachi S-400 scanning electron microscope (FE-SEM) manufactured by Hitachi, Ltd. was used. The acceleration voltage was 20 kV. And the sample preparation of the above-mentioned article was performed by embedding the test material in a room temperature curable resin, mirror polishing, performing Pt-Pd vapor deposition, and affixing on the SEM aluminum sample stage (on the carbon tape).

  As a result, it was possible to obtain a relatively good degree of spreading of the laminar particles 2. Therefore, it is considered that the desired anti-adhesion property, antifouling property, oil repellency and the like can be exhibited. Although the ceramic particles shown in FIG. 2 have sharp edges, the shape of the particles used in the present invention is not limited to this, and various particles such as spherical or other round shapes, flat shapes, etc. The shape can be adopted.

  Examples of the hard particles or ultra-hard particles that can be used in the present invention include ceramics, diamond, artificial diamond, pulverized various minerals (mainly ceramic), and the like.

The expanded sectional view of one example of the article concerning the present invention The figure which imitates the cross-sectional SEM observation photograph which shows an example of an experimental result

Explanation of symbols

1: Base material 2: Ceramic particles 3: Fluorine resin-containing nickel coating

Claims (7)

An article in which the surface wears due to contact friction with another object, and the base material is coated with hard or super hard particles on the surface of the base material so as to cover at least a part of the dispersed particles. An article having a coating formed by forming a plating layer on the surface thereof. 2. The article according to claim 1, wherein the diameter of particles dispersed on the surface of the substrate is not constant. The article according to claim 1 or 2, wherein at least one of the distribution density, distribution density distribution, particle diameter, and particle diameter distribution of the particles on the substrate surface is not constant. It is assumed that at least one of the distribution density of the particles on the substrate surface, the distribution density distribution, the particle diameter, and the particle diameter distribution is not constant, and the non-constant density and / or distribution is locally changed on the substrate surface. The article of claim 1 wherein: The article according to any one of claims 1 to 4, wherein all constituent substances or constituent substances other than the particles are made electrically conductive. The article according to any one of claims 1 to 5, wherein the plating layer is formed by electroless nickel plating or electric nickel plating. 6. The article according to claim 1, wherein the plating layer is formed by electroless nickel composite plating or electro nickel composite plating.