JPH01204986A - Corrosion-preventive film easy to stick - Google Patents

Abstract

PURPOSE:To improve the durability and workability, by applying a self-adhesive material to the rear of a weatherable film and forming a specified rugged pattern on the outer surface of the self-adhesive material. CONSTITUTION:A rubber-base, acrylic, or hot-melt self-adhesive material is applied to a weatherable film 1 selected from among a polyvinyl fluoride resin film, a weatherable vinyl chloride resin film, a weatherable polyester film, a fluororesin film, and a silicone resin film to form a self-adhesive layer 2. A die having a specified rugged pattern is then pressed against the outer surface of the self-adhesive layer 2 to form a rugged pattern in which the depth y of the recesses is 0.03mm or greater and the internal plane diameter x of the recesses is 0.05mm or greater.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an anticorrosion film with an adhesive layer that is easy to apply, and more specifically, to anticorrosion films for roofs of general houses or factories, crude oil or gas tanks, piping for chemical plants, marine structures, etc. This invention relates to an anticorrosion film with an adhesive layer that is easy to apply and is used in places where construction work is required.

(Prior Art), ′ In recent years, due to the rise in the cost of corrosion protection work, there has been an increasing demand for corrosion protection materials with a longer service life.

As a conventional corrosion prevention method, the method of applying paint is most commonly adopted. This method is widely used because it is extremely easy to prevent corrosion.However, it is not durable and requires repainting every 2 to 3 years, depending on the surrounding environment, resulting in high maintenance costs. cause an increase.

Recently, as a long-life corrosion protection method, a weather-resistant film with an adhesive coating on the back side has come into use.

However, although anti-corrosion films using these films have a durability of 7 to 10 years, there are problems in terms of construction.

That is, when applying the anticorrosive film, air pockets are likely to occur, resulting in a poor appearance. In the case of wallpaper, it is possible to make small holes with pins to allow air to escape, but in the case of anti-corrosion film, making holes does not provide the anti-corrosion effect. Therefore, not only does construction require great skill, but the construction itself also takes time.

(Object of the Invention) The object of the present invention is to eliminate the above-mentioned drawbacks and provide an anticorrosion film that has excellent durability and workability, and its gist is as follows:
The present invention relates to an easy-to-apply anticorrosion film that is composed of a weather-resistant film and an adhesive layer having an irregular cross section, and is integrally molded so that the irregular irregular surface side of the adhesive layer becomes the outer surface.

(Structure of the Invention) The present inventors adhered an adhesive layer (2 in the attached drawings) to a weather-resistant film (1 in the attached drawings), provided unevenness on the outer surface of the adhesive layer, and made the anti-corrosion film. The present invention was completed based on the discovery that adhesion has excellent workability by promoting air circulation, and can also prevent water from entering.

There are no particular restrictions on the shape of the uneven surface in the present invention, but the depth of the recess (y in the attached drawings) is 0.03u.
+ or more, the inner diameter of the concave plane (X in the attached drawing) is 0.0
It is preferably 5 m or more, and the thickness of the adhesive layer (
Regarding 2) in the attached drawings, it is preferably 0.04 degrees or more, although there are some differences depending on the environment in which it is used.

Furthermore, there are no particular restrictions on the planar shape of the uneven surface (circular, quadrangular, hexagonal, hexagonal, etc. are common).

The adhesive layer used in the present invention includes rubber-based,
Examples include acrylic type and hot melt type.

Rubber-based adhesives include those whose main components are (1) rubber such as natural rubber, polyisoprene rubber, butyl rubber, chlorobutyl rubber, or bromobutyl rubber, and (2) liquid synthetic resins such as polybutene and polyisobutylene; )
and (3) natural resins such as rosin and terpene resins, petroleum resins such as aliphatic, aromatic, copolymer and alicyclic resins,
Those whose main ingredients are tackifiers such as synthetic resins such as xylene resin, phenol resin, coumaron indene resin, etc.
and (1)+(2)+(3) as main components.

The acrylic type mainly contains one or more acrylic esters such as ethyl acrylate, 2-ethylhexyl acrylate, and butyl acrylate, and can be used in combination with vinyl monomers such as vinyl acetate, methacrylic ester, and styrene. A polymerized product is used.

Hot melt systems include (1) styrene-butadiene;
Polymer components such as block copolymers such as styrene-isoprene, styrene-ethylene-butylene, ethylene-vinyl acetate copolymers, polyisobutylene, and polyurethane (
2) those whose main component is liquid synthetic resin such as polybutene and polyisobutylene, (1) and (3) above, natural resins such as rosin and terpene resins, aliphatic, aromatic, and copolymerized resins; Those whose main components are tackifiers such as petroleum resins such as alicyclic resins, synthetic resins such as xylene resins, phenol resins, coumaron indene resins, and (1) + (
Examples include those containing 21+ (3) as a main component.

The above adhesive was crosslinked as it was, or by adding a peroxide, a photosensitizer, a polyfunctional isocyanate compound to impart a crosslinked structure, or a polyfunctional monomer as an auxiliary agent to promote crosslinking. You can also use things.

In addition, fillers such as silica, clay, calcium carbonate, zinc stearate, titanium oxide, white lead white CC, colorants, rust preventives, anti-aging agents, etc. can also be added.

As the weather-resistant film, any film can be used as long as it has weather resistance, such as polyvinyl fluoride resin film, weather-resistant polyvinyl chloride resin film, weather-resistant polyester film, polyethylene film, polypropylene film, Examples include fluororesin films, silicone resin films, and inorganic surface materials such as slate, brick, and concrete. Further, in order to improve decorativeness, it is also possible to use a material containing a coloring agent or a material having a pattern formed by printing.

The anticorrosion film according to the present invention is produced by coating the back side of a weather-resistant film with an adhesive material by a laminating method, doctor coating method, roll coater method, etc., and then applying a mold having a predetermined uneven pattern to press or press between squeeze rolls. By pressurizing the film, an anticorrosion film having an uneven surface is obtained.

(Example) EXAMPLES The present invention will be described in more detail with reference to Examples below.

In addition to the three compositions shown in the table above, as D, an acrylic adhesive material (SK1102X) manufactured by Soken Kagaku ■ was used as the main ingredient.

(2) Production of Adhesive Materials Adhesive materials A and B were obtained by kneading Compositions 9IA and B shown in the table above in a roll mill set at room temperature (25° C.). Further, Composition C was kneaded in a roll mill set at 100°C to obtain Adhesive Material C. In addition, the commercial product listed above (50
% solids concentration) was used as is to make an adhesive material.

(3) Preparation of anti-corrosion film (3)-1, adhesive materials A, B and C were sandwiched between release paper using a press set at 100°C and heated and pressurized to form a 300m x 300m film with a thickness of 0.1 A sheet of wa was produced. Next, the release paper on one side was peeled off, and a 38μ thick film made of polyvinyl fluoride (trade name: Tetra Film, manufactured by Dupont Co., Ltd.) was attached to form sample A as a comparative example.
', B' and C'.

Next, the release paper on the other side of each sample similar to the above sample was peeled off, and a polyester film with a thickness of 38 μm (Y
= 0.1 theory, x = 2fl) were stacked and pressed again in a press at 100°C to produce an anticorrosion film with an adhesive material having an uneven surface, and samples A, B, and C were used as examples.

(3) -2. Regarding the adhesive material, the above commercial product 50
% concentration was doctor-coated on release paper to a thickness of 0.2 days, and dried at room temperature for a day and night to produce an adhesive layer sheet with a thickness of 0.1**. Paste this sheet on the polyvinyl fluoride sheet (same as in 31-1) and sample D.
'.

Peel off the release paper of a sample similar to this D' 1.
(3) An anticorrosive film with an adhesive material having an uneven surface was prepared in the same manner as in (3)-1 and designated as Sample D.

(4) For pasting on an iron plate, use a test 500X500X0.3 crane-sized iron plate (material 5S-4).
1) Samples A, B, and C1 and A', B', and C' from which the release paper had been removed were placed on top and pasted with a rubber roll.

The appearance of the anti-corrosion sheet applied was as shown in the table below.

As is clear from the table above, when the anticorrosion film according to the present invention was applied (samples A, B, C, and D), there was no air pocket and the appearance was good, but the conventional film, which does not have an uneven surface, A', B'.

In both C' and D', air remained and fine blisters occurred, and no matter how many times the roll was pressed, the air did not escape, and a good appearance could not be obtained.

(5) Corrosion test The samples used in (4) above were immersed in 3% saline solution, and the state of rust on the iron plate was observed after being left for 30 days. Samples A', B', C' and D ′, Sample A, B,
No rust was observed in either C or D.

On the other hand, no intrusion of saline into the uneven surfaces of Samples A, B, C, and D was observed.

[Brief explanation of the drawing]

The accompanying drawing is a schematic longitudinal cross-sectional view of an anticorrosion film according to the present invention. Note that the correspondence relationship between the main parts illustrated and the symbols is as follows. 1... Weather-resistant film, 2... Adhesive layer. Agent Patent Attorney 1) Osamu Sumi

Claims (3)

[Claims] (1) An easy-to-apply anti-corrosion film consisting of a weather-resistant film and an adhesive layer having an irregular cross section, which is integrally molded so that the irregular irregular surface side of the adhesive layer is the outer surface. (2) The weather-resistant film is composed of a polyvinyl fluoride resin film, a weather-resistant vinyl chloride resin film, a weather-resistant polyester film, a fluororesin film, a silicone resin film, etc., or a combination of two or more thereof. An anticorrosion film that is easy to apply according to claim (1). (3) The anticorrosion film that is easy to apply according to claim (1), wherein the adhesive layer is rubber-based, acrylic-based, or hot-melt-based.