Identification function paper and identification card
First Claim
1. An identification functional paper comprising a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
- (i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material;
(ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and
(iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides identification functional paper which allows secure measurement of a change in signal caused by a magnetic material and excels in waveform reproducibility when measuring a single specimen two or more times, and an identification card including the identification functional paper. The identification functional paper includes a magnetized fiber obtained by filling the fiber inner cavity with a magnetic material, and the identification card includes the identification functional paper.
-
Citations
19 Claims
-
1. An identification functional paper comprising a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
-
(i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An identification card comprising an identification functional paper which comprises a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
-
(i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resultinzrnetal hydroxide to obtain the magnetic material.
-
-
11. An identification card comprising an identification functional paper which comprises a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
-
(i.) dispersinginatural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material, wherein said magnetic material is present in said paper in an amount of 0.01 to 10 wt%.
-
-
12. A magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprisina the steps:
-
(i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material, wherein said magnetic material is selected from the group consisting of magnetite, manganese ferrite, and manganese zinc ferrite.
-
-
13. A method of manufacturing an identification functional paper comprising a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, said method comprising:
-
(i) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii) oxidizing the resulting metal hydroxide to obtain the magnetic material. - View Dependent Claims (14, 15, 16, 17)
-
-
18. An identification card comprising an identification functional paper which comprises a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
-
(i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material, wherein the magnetic material is present in said fiber in an amount of 25 to 45 wt% and wherein said magnetic material is present in said paper in an amount of 0.01 to 10 wt%.
-
-
19. An identification card comprising an identification functional paper which comprises a magnetized fiber comprising hollow fiber having an inner cavity filled with a magnetic material, wherein the magnetized fiber is manufactured by a process comprising the steps:
-
(i.) dispersing natural or artificial hollow fibers in a metal salt aqueous solution containing a water-soluble salt of a metal which forms the magnetic material; (ii.) adding alkali to the resulting fiber dispersion liquid in an inert gas atmosphere to obtain a metal hydroxide solution; and (iii.) oxidizing the resulting metal hydroxide to obtain the magnetic material, wherein the magnetic material is present in said fiber in an amount of 25 to 45 wt%, the magnetized fiber is present in said paper in an amount of 0.001 to 30 wt%, and the magnetic material is present in said paper in an amount of 0.01 to 10 wt%.
-
Specification