JPS61170587A - Corrosion preventive tape - Google Patents

Abstract

PURPOSE:To provide a corrosion preventive tape which is easily applicable to an iron material by using a self-adhesive compds. contg. a magnetized ferromagnetic material to form a magnetic self-adhesive agent layer on one surface of a tape-like non-water permeable base material. CONSTITUTION:The corrosion preventive tape is produced by providing the magnetic self-adhesive agent layer consisting of the self-adhesive compsn. contg. the magnetized ferromagnetic material on one surface of the tape-like non-water permeable base material. A film consisting of PE, etc., or a thin film consisting of aluminum, etc., is used for the non-water permeable base material and self-adhesive agents of rubber and oligomer types, etc., are used for the self-adhesive compsn. Powder for ferrite magnet, etc. are used for the ferromagnetic material and are compounded at about 50-1,300pts.wt. by 100pts.wt. the self-adhesive compsn. The thickness of the magnetic self-adhesive agent layer is made about 0.1-3.0mm. The corrosion preventive tape which permits the easy correction of the adhering position, the correction of a wrinkle, slack, etc., and the repair in the stage of a damage, etc., is thus obtd.

Description

Detailed Description of the Invention 11ゑ11 Field of Industrial Application The present invention relates to a magnetic and adhesive anticorrosion tape that can be quickly and easily applied to the surface of steel products and protects the product from wind, rain, etc. This is an anti-corrosion tape that protects against corrosive atmospheres and is easy to adjust the attachment position and repair in the event of damage. Anticorrosion tapes are widely used, and are made up of layers that are wrapped around and attached to the surface of steel pipes, pipelines, etc. to protect them from wind, rain, and other corrosive atmospheres.

Such conventional anti-corrosion tapes use strong adhesives to firmly adhere the tape-shaped base material to the construction surface, so they are difficult to handle during construction, and the application position may shift, wrinkle, or sag. It takes time and effort to remove and repair when something like this occurs. It is also troublesome to remove and repair when damaged.

i bean charcoal! Problems to be Solved The present invention solves the above-mentioned drawbacks of conventional anticorrosion tapes, and provides an anticorrosion tape that is easy to install, corrects the attachment position, corrects wrinkles, sagging, etc., and is easy to repair when damaged. The purpose is to

The anticorrosion tape of the present invention has a magnetic adhesive layer made of an adhesive composition containing a magnetized ferromagnetic material on one side of a tape-shaped water-impermeable base material.

As the water-impermeable substrate used in the present invention, a film of plastic such as polyethylene, polypropylene, polyvinyl chloride, or polyester, or a thin film of metal such as aluminum can be used.

The adhesive composition may be any adhesive that is commonly referred to as an adhesive, such as acrylic, rubber, etc.
Oligomer type, holatomeshireto type, etc.

Adhesives, heat-curing types, and moisture-curing types thereof can be used.

Powder is usually used as the ferromagnetic material to be added to these adhesive compositions, and hard magnetic materials,
Alternatively, soft magnetic materials are used.

Specifically, powder for ferrite magnets, powder for cobalt magnets, powder for alni or alnico magnets, rare earth cobalt powder, soft ferrite powder, permalloy powder, etc. can be used.

These ferromagnetic materials are usually added in an amount of 50 to 100 parts by weight per 100 parts by weight of the adhesive composition, although it varies depending on the type of adhesive composition.
It is used by blending it into the adhesive composition in an amount of 1,300 parts by weight, preferably in the range of 200 to 1,000 parts by weight.

By changing the adhesive strength of the base adhesive composition and the blending ratio of the ferromagnetic material thereto, various magnetic adhesives optimal for specific purposes and usage conditions can be obtained.

As for the compounding method, the ferromagnetic material powder may be added little by little to the adhesive composition using a common mixing device such as a roll or a kneader.

- These formulations are formed into a tape and bonded to a tape-like water-impermeable substrate. The tape-shaped magnetic adhesive and the water-impermeable base material may be bonded together using the tackiness of the magnetic adhesive itself, or other adhesives or adhesives may be used.

The ferromagnetic material may be magnetized before or after the above-mentioned compound is attached to the water-impermeable substrate.

The above is only a general processing method, and methods other than those described above, such as a method of coating a magnetic adhesive on a tape-shaped non-water permeable base material, may also be used. The thickness depends on the content of ferromagnetic material, but is usually 0.1 to 3.0 mm.
The degree is appropriate.

Function: The anticorrosive tape of the present invention uses a strong magnetic force to share part of the adhesive force required for attaching the tape to the construction surface 2 against the force of peeling it off in the vertical direction (90° peeling). As a result, the same level of adhesion effect can be obtained with a lower adhesive force than that of conventional anticorrosion tapes.

Therefore, unlike conventional anti-corrosion tapes that only use adhesive strength to counteract peeling forces in the vertical direction, the adhesive strength of the anti-corrosion tape of the present invention can be reduced to the extent that it prevents shearing in the horizontal direction. Since it is not sticky, installation work is easy, and it is easy to correct the attachment position, correct wrinkles, sagging, etc., and repair damage.

In addition, because it adheres magnetically to steel, it has high anticorrosion performance and can be applied to underwater structures where adhesive effects do not work.

The anticorrosion tape of the present invention can be used not only for industrial purposes such as protecting steel pipes and other iron materials, but also for repairing tin roofs and other household purposes.

Example 1 Conjugated diene butyl rubber (Exxon Chemiyoku JIJ) was used as a magnetic adhesive to test shear adhesion and 90” peel resistance to iron plates.
100 parts by weight Polyptenro manufactured by Hikari Petrochemical: 2
000H) 600 //Silica(
Japan! 7Ml1lJi: Knee/Pshir VN -
3) 40 tt2.6-sheet tert
-Butyl-P-cresol 1 A tacky composition obtained by kneading a mixture of
A barium ferrite based magnetic powder (manufactured by Nippon Bengara Co., Ltd.) SOO Jukei Jyuonbu was added to this, and after kneading with a roll, a tape with a thickness of 1 mm was formed using a press heated to 80°C.

Furthermore, as a backing, a 50" polyester film was press-bonded on one side of the tape, which was magnetized, and then attached to an iron plate to perform a shear adhesion test on the iron plate.
An il test was conducted. This anticorrosive tape has almost no stickiness on its adhesive surface.

Comparative Example 1 A 1 mm thick tape was molded using only the above-mentioned adhesive composition without the addition of magnetic powder, and a 50-sized polyester film was press-bonded to one side as a backing, and the same test as in Example 1 was conducted.

Comparative Example 2 Example 1 for commercially available anticorrosion tape (petrolatum type)
I conducted a similar test. The adhesive surface of this anticorrosion tape was extremely sticky, and the peeling surface was extremely dirty.

The test results of Example 1 and Comparative Examples 1.2 are shown in Table 1.

Table 1 The anticorrosion tape of Example 1 has low adhesive strength and peel strength comparable to conventional anticorrosion tapes commercially available.

11 Rikuo J The anticorrosive tape of the present invention can be easily applied to iron materials, and it is easy to correct the attachment position, correct wrinkles, sagging, etc., and repair when damaged.

Claims (1)

[Scope of Claims] 1. An anticorrosive tape comprising a magnetic adhesive layer made of an adhesive composition containing a magnetized ferromagnetic material on one side of a tape-shaped water-impermeable base material. 2 The ferromagnetic material is 5 parts by weight per 100 parts by weight of the adhesive composition.
The anticorrosion tape according to claim 1, wherein the anticorrosive tape contains 0 to 1300 parts by weight.