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Thin microcapsule magnetic flowing display panel and its using method

A technology of microcapsules and display panels, applied in the directions of microcapsule preparations, microsphere preparation, static indicators, etc., can solve problems such as obstacles in use and lack of products

Inactive Publication Date: 2004-05-05
野中督 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when a part of the card surface with a thickness of about 760 μm is cut off with a thickness of about 275 μm to form a groove, when the aforementioned microcapsule magnetic recording board (or microcapsule magnetic display board) is embedded in the groove, due to the particle size of the microcapsule The diameter is 200-600 μm, and the thickness of the card made by using it is more than 1000 μm. Only the part of the microcapsule magnetic display panel protrudes, which will cause obstacles in use. In addition, if the card is made into the same thickness as the raw material, the aforementioned obstacles can be covered. But from the point of view of thinness and shortness, no satisfactory product can be obtained

Method used

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  • Thin microcapsule magnetic flowing display panel and its using method
  • Thin microcapsule magnetic flowing display panel and its using method
  • Thin microcapsule magnetic flowing display panel and its using method

Examples

Experimental program
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Effect test

Embodiment 1

[0073] figure 1 is a sectional view of the microcapsule magnetic display panel of the present invention, in addition, the microcapsule of the present invention has figure 2 The sectional view shown. figure 2 The microcapsule 1 shown in is formed by encapsulating magnetic particles 3 and non-magnetic particles 4 dispersed in a dispersant 5 in a gelatin coating 2 . Such microcapsules are produced as follows. As the magnetic particles 3, ferrite powder particles with an average particle size of 0.3 μm (trade name Talaus Kusi (Clocks) BL-50, a product manufactured by Titanium Industry Co., Ltd.) were pulverized to obtain 2% by weight and as For non-magnetic particles 4, 40% by weight of dibutyl phthalate as a high boiling point solvent was added to 11.6% by weight of white titanium oxide powder (trade name R-820, manufactured by Ishihara Sangyo Co., Ltd.) with an average particle diameter of 0.26 μm. To the mixed solvent after mixing 45% by weight of toluene as a low boiling ...

Embodiment 2

[0079] For the microcapsule magnetic display panel produced in Example 1, the type of erasing magnet was changed, and the erasing state was investigated. When using a one-sided multi-pole magnet for erasing work (moving on the surface where the characters are recorded), the writing can be erased, but streaks are generated on the surface of the board, and it cannot be erased in a uniform state. In addition, when erasing was performed using an erasing magnet with a surface magnetic flux density of 1100 Gauss, a dark surface was obtained, which was not very good. On the other hand, in the present invention, when erasing is performed using an erasing magnet having a surface magnetic flux density of 250 gauss, notes can be erased cleanly, and the surface is white and clean without unevenness. In addition, in this example, the magnet is moved on the character recording surface for erasing. In the present invention, of course, it is also possible to move the magnet inside the display...

Embodiment 3

[0081] According to the method of Example 1, respectively manufacture (1) microcapsules with an average particle diameter less than 10 μm; (2) microcapsules with an average particle diameter of 30 μm; (3) microcapsules with an average particle diameter of 100 μm; (4) with an average particle diameter of 150 μm microcapsules and (5) microcapsules with an average particle diameter of 250 μm, and further make a microcapsule magnetic display panel in the same manner as in Example 1, and observe the note state and the elimination state respectively. In (1) of the prior art, the entire surface is a blackened notebook without contrast. In addition, the elimination state is also dark. In (5) of the present invention, since the elimination becomes slightly darker, a black-and-white contrast is formed, and there is no obstacle in practical use. Particularly preferred are (2) to (4) in the present invention, each of which has a good erasing state, is white, and has a large contrast with...

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Abstract

A thin micro capsule magnetic migration display sheet is disclosed, which comprises micro capsules with an average grain size of 30-170 [mu]m, a solid dispersion layer with a thickness of 50-360 [mu]m, and the whole thickness of the micro capsule magnetic migration display sheet is not more than 700 [mu]m. In addition, a protective member of 10-200 [mu]m is provided on this. The solid dispersion layer is coated with an ultraviolet curing resin. Magnet is used to proceed recording and erasing on the display sheet. The display sheet is light, thin, and small, in which the contrast difference of white and black is high, recorded characters are clear, and the erasing is performed clearly.

Description

technical field [0001] The present invention relates to a thin microcapsule magnetic phoretic recording board. More specifically, the present invention relates to a thin microcapsule that is light, thin and small, and can be installed and used in a credit card for information display or recording, and can perform both recording and erasing from the surface side. Magnetic mobility recording plate and method of use thereof. Background technique [0002] In the known magnetic display panel and magnetic recording method, a microcapsule formed by coating and encapsulating a certain light-absorbing magnetic powder and a light-reflecting non-magnetic micropowder (white) is provided on the inside of a non-magnetic substrate. The coating layer is further provided with a structure of a transparent protective layer that prevents the microcapsules from being damaged by frictional pressure, and slides in the magnetic device from one end of the display side of the structure to the other e...

Claims

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Application Information

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IPC IPC(8): B42D15/10B01J13/02B42D15/00G02F1/00G09F9/37G09G3/20G11B11/00
Inventor 岩崎孝安原拓也
Owner 野中督
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