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Eraser

An eraser and transparency technology, applied in the field of erasers, can solve the problems of lower erasure rate and wear reduction

Active Publication Date: 2015-09-16
SAKURA COLOR PRODUCTS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the calcium carbonate added in the past is not added, the eraser will definitely become transparent, but there are disadvantages that the amount of abrasion and the erasing rate will also decrease during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0076] A resin composition for a transparent eraser was produced by heating, mixing, and defoaming the raw materials in the amounts shown in Table 1 below, and the composition was molded and impregnated with foamed melamine-based resin with a porosity of 99.8%. In vivo to manufacture the transparency eraser of the present invention.

[0077] Table 1

[0078] raw material

Embodiment 2）

[0080] A resin composition for a transparent eraser was produced by heating and mixing the raw materials in the amounts shown in Table 2 below, and the molded product was used for press molding and heated to obtain an eraser.

[0081] Table 2

[0082] raw material

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Abstract

The invention aims at providing an eraser which has high transparency and has sufficient high erasing rate and strength, and at the same time improving the moldability in production by reducing the content ratio of a bulking agent. The invention provides a transparent eraser containing 0.5-15.0% of silica particles relative to a resin composition.

Description

technical field [0001] The present invention relates to erasers. Background technique [0002] Common vinyl chloride resin erasers contain calcium carbonate as a filler (extender pigment). By adding this calcium carbonate, the eraser is worn by friction with the paper surface during use, and the eraser dust generated thereby peels off and gathers the pencil powder of the handwriting produced by the pencil written on the paper surface as if involved, as As a result, handwriting can be eliminated so as to achieve erasure. [0003] In this way, the eraser contains calcium carbonate, and erases characters while generating eraser dust as a result of rubbing against the paper surface. [0004] The aforementioned eraser is opaque white due to containing calcium carbonate. However, considering the design of the eraser, it is known that there is an eraser that is transparent without adding calcium carbonate. Since this transparent eraser does not contain calcium carbonate, it is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43L19/04
Inventor 辻尾伸二
Owner SAKURA COLOR PRODUCTS CORPORATION