Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1993-03-29
1994-03-15
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156654, 156904, 156905, B44C 122, C23F 100
Patent
active
052942970
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for processing the surface of a work roll in which the surface of a work roll is coated, at a predetermined portion, with a cured product of a photosensitive resin composition to thereby form a pattern and the surface of the work roll is chemically etched at the remaining uncoated portions and the cured product is peeled off to thereby process the surface of the work roll.
BACKGROUND ART
In general a steel plate or sheet is coated with a paint and then supplied as a product for use as a body of, for example, automobiles, an outer plate or sheet of domestic electric appliances. In recent years, not only the quality of products but also the appearance of products, which appeals to the sense of sight has become regarded as being of importance. With respect to factors having an effect on appearance, it is said that appearance is greatly influenced by the surface roughness of the steel plate or sheet, although it depends also upon the thickness of the coating.
The roughness on the surface of the steel plate or sheet is formed by transferring unevenness of the surface of the roll to the surface of the steel plate or sheet at the time of cold rolling or skin pass rolling. In order to improve this fact, Japanese Examined Patent Publication (Kokoku) No. 62-11922, for example, discloses a method for processing a roll which comprises coating the surface of a roll with an ultraviolet curing photosensitive resin to form regular marks. In this method, however, the sensitivity of the photosensitive resin is so low that an energy of several tens to several hundreds of mJ/cm.sup.2 is necessary for curing the photosensitive resin. For this reason, when the photosensitive resin is cured by using an ultraviolet laser having an output of 100 W or more as an energy radiation, an exposure time of 50 msec is necessary, for example, in the case of a photosensitive film having a thickness of 7 .mu.m, and it takes a lot of time for a fine uneven pattern to be formed on the surface of the roll, which leads to a problem of remarkably poor productivity.
Further, in the conventional ultraviolet laser device, since it is difficult to continuously ensure a stable energy at a high output for a long period of time, the use of a high performance ultraviolet laser device requiring a high equipment cost becomes necessary for continuously ensuring a stable energy at a high output for a long period of time.
DISCLOSURE OF THE INVENTION
An object of the present invention is to solve the above-mentioned problems and to provide a method for processing the surface of a work roll, which is capable of improving the surface property of the steel plate or sheet and is capable of shortening the time taken for processing the work roll and of processing the surface of the work roll by means of an inexpensive roll processing device.
In accordance with the present invention, there is provided a method for processing the surface of a work roll, comprising the steps of:
coating the surface of a work roll at a predetermined portion with a cured product of a photosensitive resin composition to form a pattern; and
chemically etching the surface of the work roll at the remaining uncoated portions and peeling the cure product to process the surface of the work roll, wherein said composition comprises a visible light curable photosensitive resin composition and is cured by visible light irradiation.
As the above-mentioned composition, use is made of a visible light curable photosensitive resin composition comprising an ethylenically unsaturated compound, a radical generator and a sensitizer and optionally a binder polymer.
BRIEF DESCRIPTION OF DRAWINGS
The present invention will now be described in more detail with reference to the accompanying drawings, wherein:
FIGS. 1 (a), (b), (c) and (d) are diagrams showing one embodiment of the processing steps for imparting unevenness according to the present invention.
FIG. 2 is a typical diagram showing an embodiment of an uneven pattern formed on the surfa
REFERENCES:
patent: 4059479 (1977-11-01), Tanazawa
patent: 4959275 (1990-09-01), Iguchi et al.
Hagio Shigeru
Kurahashi Motofumi
Narita Yoshihei
Nishiura Tetsuya
Takemoto Masanori
Nippon Steel Corporation
Powell William A.
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