JPH01294875A - Surface treatment for resin film and the like - Google Patents

Abstract

PURPOSE:To improve the adhesive strength of a thin metallic film by previously applying sand blasting treatment to the surface of a member made of synthetic resin or metal to roughen the surface and then carrying out electric discharge treatment at the time of forming a thin metallic film on the surface of the above member. CONSTITUTION:At the time of forming a thin film of a metal, such as Al, Cu, Cr, Ni, and Sn, or a compound, such as ITO, on the surface of a synthetic resin member or a metallic member by a vacuum vapor deposition method, a sputtering method, an ion plating method, etc., the surface of the synthetic resin member or the metallic member is roughened by means of sand blasting treatment. Subsequently, after this material 6 is placed in a hermetically sealed-type reaction vessel 1 and the inside of this vessel 1 is evacuated by means of a vacuum pump 2, Fe-or Si-type chemicals in a vessel 4 is introduced via a needle valve 3 and, successively, an F-or Si-type thin releasing film is formed by the polymerization by plasma discharge by means of a high-frequency electric power source 5, and further, the surface of the releasing thin film is modified by means of plasma treatment. When a thin film layer of metal, etc., is formed on the surface after the above treatment, the adhesive strength of the thin film layer of metal, etc., to a member made of synthetic resin or metal is improved and the peeling of this thin film layer can be prevented.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention relates to the surface treatment of materials such as resins and metals for use in forming laminates or printing by physical or chemical deposition treatment. Regarding processing method.

(Conventional technology and issues) When manufacturing name plates, printed wiring boards, adhering metal plates to synthetic resin, etc., vacuum deposition,
Deposition processing is performed using methods such as sputtering and ion blasting, but the plating layer deposited on resin or metal materials such as synthetic resin films and metal sheets used for this process may peel off, or the deposits may peel off, such as aluminum, ITo, copper, or chromium. , nickel, tin, etc., there is a problem that the deposited layer dissolves or peels off during pre-surface treatment and post-deposition wet treatment. Particularly in the roll-to-roll processing method, there is a problem that the deposited layer is easily peeled off.

Furthermore, there is a problem in that the printing ink tends to peel off when printed on resin or metal materials.

Conventionally, in order to improve the adhesion of films and organic coatings, ion bombardment has been carried out at around 5 torrels, but this requires equipment costs and work time, and is also problematic in terms of safety. In addition, acid or alkali treatment is conventionally used to remove dust and other substances adhering to the surface of materials, but this requires equipment to treat chemicals and their waste liquids, and both dry and wet methods must be used together. Not only that, but the work efficiency is also poor.

This invention prevents the deposited layer and printing ink from peeling off,
It is also an object of the present invention to provide a method that can efficiently and safely perform surface treatment of resin or metal materials to improve decorativeness at a low cost.

(Means for Solving the Problems) Synthetic resin or metal materials are mechanically processed by sandblasting, etc., and mold releasability is imparted by plasma polymerization, or adhesiveness is enhanced by plasma treatment.

(Function) Machining such as sandblasting transforms the material surface into a primary textured surface,
Plasma polymerization forms a release layer on the material surface, and plasma treatment roughens the material surface and increases the degree of adhesion.

(Example) Example I A PET film was sandblasted with approximately 180 mesh abrasive grains of aluminum oxide at an air pressure of 3.5 kg/cnl and a speed of 7 m/min, and plasma treated at 13.56 MH2. For sandblasting, use one type of low-pressure blower at an air pressure of 0.2 to 0.3 +r/C [I! However, the same effect was obtained.

The above-mentioned surface-treated PET film has a contact angle with water of approximately 30 degrees, which increases its adhesion and maintains approximately 60 degrees of adhesion over time.
It only goes back to a certain point. Using this film, a thin copper film is formed by ion blasting, a urethane rubber printing mask is applied, and the copper thin film not covered by the masking is sandblasted and ground to create characters, drawings, lines, etc.
When a conductive pattern was fabricated, the adhesion between the copper thin film and the pattern was extremely good.

In addition, chromium was vacuum-deposited on the entire surface of the surface-treated film, and then pressed onto another material to obtain a composite material.

Not only chromium, but also nickel, copper, etc. may be vacuum-deposited.

These composite materials can withstand considerable bending, making them highly practical for use in circuits and nameplates.

Example 2 A 25 μm polypropylene film was coated with 20 μm as an abrasive material.
0 mesh iron oxide, air pressure 4kg/cd, speed 10
When surface treatment was performed by sandblasting at m/min and corona discharge, the degree of contact with water was approximately 30 degrees or less.

1.2μ by vacuum deposition on the above surface-treated film.
After forming a copper thin film of 3 μm, copper plating with a thickness of 3 μm was performed, and an alkaline peeling resist was printed and knitting was performed with ferric chloride solution to form letters, strokes, and lines. The plating adhesion was extremely good.

Example 3 The surface of a 25μ PET resin film was
, and 250 mesh silica sand (0.2 kg/cri with one low-pressure blower) to give a matte rough surface, and then plasma treated with 13.56 MH2.

On this surface-treated film, water-soluble masking printing is performed, indium oxide is ion-blated, the water-soluble ink is removed by washing shower treatment, and copper plating is applied to the indium oxide to a depth of 8 μm to create circuits or metal patterns. When formed, the adhesion between the film and circuit patterns made of indium oxide and copper plating was extremely good.

Example 4 The surface of a polyester sheet was sandblasted with 250 mesh aluminum oxide to give it a satin finish, and subjected to corona discharge to give a composite surface roughness.

This surface-treated sheet is then ion-blated with 2μ copper, then masked or stenciled (
Masking was provided by placing a masking frame), 2 μm nickel plating was performed, and the portions not covered with nickel plating were polished off with 120 mesh aluminum oxide to form patterns such as letters, drawings, lines, etc. The adhesion between this pattern and the sheet is extremely good.

Example 5 A foil or sheet of stainless steel, iron, copper alloy, etc. was sandblasted in the same manner as in Examples 1 to 4 above, and then treated with ammonium molybdate and chromic acid (1-2%, 1%).
0 to 40 seconds) to form a release layer on the sheet.

A resist is printed on this release layer, the part of the release layer that is not covered with resist is fully plated, the resist is removed, the material is hot-pressed and bonded to another material, and the release layer peels off. By transferring the pattern, we were able to accurately create name plates, conductive circuits, face plates, electromagnetic shielding materials, etc., and easily transfer them to objects to be adhered. Depending on the degree of sandblasting, the surface gloss of the pattern could be adjusted, and it also had a decorative effect.

Example 6 The surface of an aluminum material is sandblasted to make it matte in the same manner as in the previous example, and corona discharge or plasma treatment is performed in an ozone atmosphere to oxidize the surface to form an aluminum oxide layer and harden the surface.

This surface-treated aluminum material has excellent adhesive properties for laminating, insulating materials, and printing.

In the fifth and sixth embodiments, mechanical processing such as spin, double spin, cut hair, and surface polishing (glossy roll) may be performed instead of sandblasting.

As a method for performing plasma polymerization or plasma treatment, it is preferable to use the apparatus shown in the drawings.

The device shown in the drawing includes a reaction container 1 that can be sealed, a vacuum pump 2 and a chemical container 4 connected to each other via a needle valve 3, and a high-frequency power source 5 capable of discharging high-frequency waves inside the reaction container 1. It is.

The chemical container 4 stores chemicals such as fluorine-based or silicon-based (including polysiloxane-based) chemicals. When performing plasma polymerization using this apparatus, the material 6 is stored in the reaction vessel 1, the inside of the reaction vessel 1 is set to approximately 0.5 to 1 torr using the vacuum pump 2, and the needle valve 3 is opened. When the chemical vapor in the container 4 enters the reaction container 1 and a high frequency wave is applied to the material 6 from the high frequency power source 5, a releasable thin film is formed on the surface of the material 6.

In addition, when performing plasma treatment, the needle valve 3
Close the chamber, and use the vacuum pump 2 to pump the inside of the reaction vessel 1 to approximately 0.5 to 1
When high frequency is applied to the material 6, the surface of the material 6 is modified and its adhesiveness increases.

Plasma polymerization and plasma treatment may be performed separately as described above, or plasma polymerization may be followed by plasma treatment to modify the surface of the releasable thin film. Material 6
In the case of a molded article, it is preferable to perform corona discharge treatment on the needle electrode instead of plasma treatment.

(Effects) The present invention forms an excellent material with high adhesiveness or an excellent material with high mold releasability and easy pattern transfer for forming printed wiring, name plates, etc., and manufacturing decorative laminates,
Furthermore, when a transparent synthetic resin film or plate is surface-treated by the method of the present invention, a material with excellent decorative properties can be obtained.

In the case of synthetic resin films or metal foils, the present invention can be carried out roll-to-roll, resulting in good working efficiency.

[Brief explanation of the drawing]

The drawings show an example of an apparatus for carrying out the invention. 1... Reaction container 2... Vacuum pump 3... Needle valve 4... Chemical container 5... High frequency power source 6... Material

Claims (1)

[Claims] 1. A method for surface treatment of a resin or metal material, which comprises roughening the surface of the resin or metal material by mechanical processing such as sandblasting, and then further performing electric discharge treatment to improve mold releasability and/or adhesion.