Patent Application
20060096723
The present invention is related to a magnetically attractable paper structure, and more particularly to a magnetically attractable paper structure which is flexible, light and thin.
It is often seen that a magnet is attracted on an iron-made surface. For example, a magnet can be attracted on a whiteboard or a casing of a refrigerator for fixing a memo or marking a position. The magnet can be a block body or a plate body with a certain thickness. Such magnet is not flexible so that the application of the magnet is quite limited.
A common paper sheet is required to have thin thickness, good flexibility, high humidity absorbability and breakability. In the case that the magnetic sheet 30 is directly adhered to or overlaid on the surface of the paper sheet, the thickness and flexibility of the paper sheet will be greatly affected. This will limit the application of the paper sheet.
Moreover, it is known that paper sheet will quickly absorb liquid into the fibers to crimp the paper. In the case that a magnetic solution is painted on the surface of the paper, the solvent of the solution will be fully absorbed into the paper. Therefore, even in a dry state, the magnetic material can be hardly truly bonded with the surface of the paper. As a result, the magnetic material tends to detach from the paper.
Also, a magnetic material can be added to a fabric in such a manner that the fabric is directly soaked into a magnetically attractable material (magnetic powder or ferrous material powder) doped with spreading agent. After the magnetically attractable material infiltrates into the fibers of the fabric, the fabric is rolled to remove excessive magnetically attractable material and pressed into a thin sheet. The thin sheet is then magnetized as necessary to form a magnetically attractable fabric product. However, such processing measure is not applicable to paper material which has high water absorbability.
It is therefore a primary object of the present invention to provide a magnetically attractable paper structure including a substrate paper. An interface painting layer is painted on at least one surface of the substrate paper. A liquid magnetically attractable material is then painted on an outer face of the interface painting layer to form a thin magnetically attractable material painting layer. The interface painting layer serves as a protective film for reducing the solvent absorbability of the substrate paper. Therefore, the magnetically attractable material painting layer can be more easily and firmly bonded with the substrate paper. The magnetically attractable material painting layer is magnetically coordinated and magnetized to have magnetic attraction to form a magnetically attractable paper with very thin thickness and good flexibility.
It is a further object of the present invention to provide the above magnetically attractable paper structure in which the interface painting layer also serves to enhance the strength of the substrate paper and prevent the substrate paper from being crimped.
The present invention can be best understood through the following description and accompanying drawings wherein:
Please refer to
In the above structure, the substrate paper 1 itself is light and thin and the magnetically attractable material painting layer 3 on outer face of the substrate paper 1 is very thin. Therefore, the consumption of material is reduced and the paper product has the original flexibility and can be easily rolled, folded and cut into a desired shape. Also, the surface of the paper product can be printed with desired pictures and characters. The application of the paper product is widened.
The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.
