JP3343676B2 - Composite coating of plating and fluororesin and method of forming - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite film of plating and a fluororesin and a method of forming the same, and more particularly to a method of forming a plating and a fluororesin coating layer on the surface of iron and steel, aluminum and alloys thereof without peeling. The method and the composite coating that does not peel off.

[0002]

2. Description of the Related Art Conventionally, a method has been known in which plating or a coating film is formed on steels, aluminums, and alloys thereof as a base metal, thereby imparting corrosion resistance to the base metal or imparting the performance of the coating. Are known.

[0003]

The above-mentioned conventional fluororesin film cannot be used in places requiring hardness, such as a heat sealer, due to the soft properties of the resin itself. The present invention analyzes the adhesion and hardness of the conventional plating and fluororesin to the base metal, and makes use of the characteristics of both to provide the releasability of the fluororesin and the hardness of the plating film. The inventor of the present invention has completed the present invention as a result of diligent research, focusing on the fact that a composite film having a good effect can be obtained.

[0004]

The present invention has the following technical means in order to solve the above problems and achieve the object.

That is, the plating and the shape of the fluororesin composite film
In the invention of the forming method, a plating film is formed on the surface of the base metal.
Forming a myriad of cracks in the plating film in the process,
Fluorine resin to countless cracks formed on the surface of the gold film
Impregnated with innumerable cracks and plated skin
A step of applying a fluororesin coating to cover the surface of the film,
This is fired in a vacuum furnace to convert the fluororesin film into a plating film.
And the process of bonding to the body.
I am The plating film has a thickness of 1.5 μm to 30 μm.
Is preferably within the range.

[0006] The plating voltage is generally 2 V, but in the present invention, the voltage is in the range of 2 V to 8 V, and the plating time is selected in the range of 5 to 50 minutes according to the plating film thickness. Adjusted. When the plating thickness is 1 μm or less, cracks are unlikely to occur, but preferred cracks are obtained in the range of 1.5 μm to 30 μm, preferably in the range of 2 μm to 10 μm.

[0007] In the plating step, the coating material is made of chromium, nickel, nickel or nickel by electrolytic plating. You can choose from chrome.

[0008] The fluororesin film forming step can be selected from powder coating, fluid immersion, spray coating, and dip coating.

The fluororesin is PFA, FEP, PT
It can be selected from FE alone or a composite resin thereof.

Further, the base metal after plating is heated to crack.
A step of enlarging the work may be provided.

In the invention of plating and a fluororesin composite film,
Has a film thickness of innumerable cracks on the surface of the base metal.
A plating film of 5 μm to 30 μm is formed.
Innumerable cracks in the gold film impregnated with fluororesin
And the surface of the plating film where countless cracks are formed
Fluorine resin coating is applied so as to cover, and baked in a vacuum furnace
By combining the fluororesin film with the plating film
It has taken the technical measures.

[0012]

The present invention configured as described above has the following operation.

[0013] By plating with a high voltage and a large thickness, countless cracks occur in the plating film. If heating such as empty baking after plating, the cracks are enlarged.

When a fluororesin coating is applied to the base metal surface,
Fluororesin penetrates into cracks, and baking in a vacuum furnace ensures that resin penetrates into the crack bottoms and hardens,
Combined with plating.

When the plating film is not exposed, the resin contained in the cracks serves as an anchor, and the fluororesin film is not easily peeled off.

When the surface treatment is performed so that the plated film is exposed, a fluororesin film is scatteredly formed in the crack portion to form a composite film coexisting with the plated film.

[0017]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an iron test piece. Iron test piece (100mm
× 50mm × 1.5mm) 1 was degreased with Triclean,
After pre-treatment of strike Cu, Cu pyrophosphate, nickel, etc., the chrome plating is adjusted to a thickness enough to cause cracks 3 (adjusted by voltage and plating time, for example, 1.5 μm to 3 μm).
0 μm) to form a plating film 2, and in the process, countless cracks 3 were formed in the plating film 2. When the plating film thickness was 1.5 μm to 10 μm, sufficient cracks 3 occurred. If the thickness is more than this, cracks tend to be small.

The voltage used for the plating ranges from 4 V to 8 V, preferably around 6 V, and the plating time is 5 minutes to 2 minutes.
After 5 minutes, preferably about 10 to 25 minutes, the preferred cracks 3 were formed. The plating time can be shortened by increasing the voltage, but the voltage and the plating time are appropriately adjusted in relation to the plating film thickness.

Thereafter, the test piece 1 is heated to about 300 ° C.
By baking for 20 minutes, the countless cracks 3 formed on the surface of the plating film 2 were enlarged. This can be done as needed, and the temperature and time are appropriately selected. This situation is shown in FIG. The white part is crack 3.

After applying PFA to a thickness of about 10 μm or a required thickness on the surface of the plating film 2 on which the cracks 3 were formed, the resultant was baked at about 380 ° C. for about 30 minutes in a known vacuum furnace.

Using this test piece 1, a pencil hardness test, a salt spray test, a contact angle test, and a 90-degree bending test were performed. The results shown in Table 1 were obtained.

[0022]

[Table 1]

With the above configuration, a composite film of plating and a fluororesin coating film is formed on a base metal such as iron, copper, aluminum, and stainless steel, so that the releasability of the fluororesin portion is excellent and the hardness of the plating portion is high. An excellent film was formed. Thereby, it can be used in a wide range of fields such as abrasion resistance of a roll of an electronic device, a bearing, a mold, and a heat sealer.

It should be noted that the present invention is not limited to the above-described embodiment, and the design can be appropriately changed to meet the purpose.

[0025]

The present invention configured as described above has the following excellent effects.

The present invention is a composite film in which a crack is formed in a plating film in a plating process and a fluororesin film is formed on the crack surface. Therefore, the plating and the fluororesin film exhibit respective characteristics in a plane direction. For this reason, there is an effect of having both performances excellent in hardness and releasability.

Since it is a composite film in which a plating film and a fluororesin film are mixed, each has an effect of complementing the bonding ability to the base metal and having excellent adhesiveness, and is hardly peeled off.

Since it has both hardness and releasability, it has the effect that it can be used in a wide range of fields such as abrasion-resistant rolls, bearings, molds and heat sealers which require hardness and releasability.

Since the basic cracks are formed in the plating process, there is an effect that no special process is required.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing cracks in a plating film.

FIG. 2 is a plan view showing cracks in a plating film.

[Explanation of symbols]

 1 Base metal 2 Plating film 3 Crack 4 Fluororesin film

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C23F 15/00 B32B 15/08 102 C09D 127/12

Claims (8)

(57) [Claims] 1. A step of forming an infinite number of cracks in a plating film in a process of forming a plating film on a surface of a base metal, and a step of forming an infinite number of cracks formed on the surface of the plating film by a fluorine resin.
Plated with impregnated fat and countless cracks
A step of coating the fluororesin so as to cover the surface of the film, and firing this in a vacuum furnace to convert the fluororesin film into a plating film
A method of forming plating and a fluororesin composite film, comprising a step of integrally bonding . 2. The method according to claim 1, wherein the thickness of the plating film is in a range of 1.5 μm to 30 μm. 3. The plating step, wherein the coating material is made of chromium, nickel, nickel or nickel by electrolytic plating. 3. The method according to claim 1, wherein the coating is selected from chromium. 4. The method according to claim 1, wherein the base metal is iron, aluminum,
3. The method for forming a plating and fluororesin composite film according to claim 1, wherein the method is one selected from copper and alloys thereof. 5. The plating method according to claim 1, wherein the fluororesin film forming step is selected from powder coating, fluid immersion, spray coating, and dip coating. A method for forming a fluororesin composite film. 6. The fluororesin is PFA, FEP, P
The method for forming a plating and fluororesin composite film according to any one of claims 1 to 4, wherein the method is selected from a simple substance of TFE or a composite resin thereof. 7. Heating the plated base metal to crack it
2. The method according to claim 1, further comprising the step of enlarging.
Or the method of forming the fluororesin composite film described in 2 above
Law. 8. The substrate metal surface has countless cracks.
Plated film having a thickness 1.5μm~30μm is formed, a fluororesin countless cracks occurring in the plating film containing that
Immersion and plating film with countless cracks formed
A plating and fluororesin composite film characterized by being coated with a fluororesin coating so as to cover the surface and firing in a vacuum furnace to integrally bond the fluororesin film to the plating film.