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Erasing tool

A technology of tools and particles, which is applied in the field of erasing tools, can solve the problems of not having high light transmittance, and achieve the effect of high light transmittance

Active Publication Date: 2019-11-22
MITSUBISHI PENCIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it can be found that the erasing tool described in Patent Document 2 also does not have such high light transmittance even for light-colored adsorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]

[0055] A blend composition (paste) was prepared by mixing the above blend materials with a vacuum mixer. The prepared blended composition was poured into a mold having a thickness of 10 mm for shaping, and the paste was heated at 130° C. for 2 hours while applying 200 kg / cm 2 The pressure to get the erasing tool (20 × 54 × 10mm, the same below).

Embodiment 2

[0057]

[0058] In the same manner as described in Example 1 above, a blend composition (paste) was prepared by mixing the above blend materials with a vacuum mixer, and then the paste was poured into a mold to be shaped, and heated at 130° C. 2 hours while applying pressure to get the erasing tool.

Embodiment 3

[0060]

[0061]

[0062] In the same manner as described in Example 1 above, a blend composition (paste) was prepared by mixing the above blend materials with a vacuum mixer, and then the paste was poured into a mold to be shaped, and heated at 130° C. 2 hours while applying pressure to get the erasing tool.

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PUM

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Abstract

Provided is a highly translucent erasing tool that does not generate leavings, instantly shows an adsorption degree of even a pale color or the like of a color pencil lead or the like, and enables reliable erasure. The erasing tool is characterized by including a secondary aggregate having petaloid particles as primary particles, wherein an average particle diameter is 1 to 100 [mu]m.

Description

technical field [0001] The present invention relates to an erasing tool which is excellent in erasability of written lines such as pencils, mechanical pencils, and colored pencils, does not generate eraser crumbs, and has light transmission properties. Background technique [0002] Generally, the material of the erasing tool is known, such as rubber-based erasing tools such as natural rubber and synthetic rubber, and plastic-based erasing tools including plastic resins such as vinyl chloride resin as a main resin, and the shape is known as a general rectangle, and Good for corner erasing polygons etc. In addition, it is known that erasing tools prepared by mixing base materials with various abrasives, inorganic materials, etc. enhance the erasability of traced lines. [0003] The problems involved in traditional erasing tools in the past are the need to collect and dispose of generated erasing debris, contamination of floors with incompletely collected erasing debris, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L19/00
CPCB43L19/0025B43L19/00C08K3/013C08K5/0016
Inventor 松岛良介坂西聪
Owner MITSUBISHI PENCIL CO LTD
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