KR20000019514A - Process for preparing light accumulating crayon pastel - Google Patents

Abstract

The present invention relates to a method of manufacturing photoluminescent crayons reinforced with a special filler in the photoluminescent pigment, wherein the photoluminescent pigment is not less than 1% by weight, luminous phosphorescent filler 20 to 80% by weight, oil 20 to 80% by weight, and other constitution improvers. It relates to a photoluminescent crayon production method and use.

It is a method designed to cultivate children's interest in the use of crayons, a coloring effect learning tool for children in Korea, and to cultivate the ability to color more clearly by cultivating the outline of the object. So far, calcium carbonate was used as a filler for crayons. When the pigment is mixed, there is a drawback of lowering the brightness of light, so that there is no improvement.

Therefore, in the present invention, the brightness of light by making the same as the mixing conditions of other existing additives by using natural stone or synthetic inorganic filler containing a large amount of alumina which reduces the brightness of light slightly and oil absorbent silica for reinforcing constituents. It is a method of manufacturing crayons by increasing the photoluminescence efficiency.

Description

Phosphorescent crayon manufacturing method

The present invention relates to a method of manufacturing photoluminescent (luminous) crayons reinforced with a special filler in the photoluminescent pigment.

In the case of conventional crayons, pigments and fillers were mixed with spindle oil (oil) and commercialized. In the case of fillers, calcium carbonate, which has good colorability and filling density, was used. Was one of the challenges in the development of.

Therefore, in the present invention, the preliminary experiment for the selection of the filler which can be used mixed with the phosphorescent pigment and the photoluminescence effect according to the increase and decrease of the amount of the selected filler are analyzed to emit light of the natural stone or the composite containing the alumina component in the filler more than 60%. I found it effective. In addition, in order to increase the constitution of crayons, an oil absorbent silica was mixed in an appropriate amount to give the same texture as regular crayons.

In the present invention, the phosphorescent pigment is an inorganic fluorescent pigment, and a combination of an activator with zinc sulfide is used for green silver copper, yellow silver manganese, purple silver, and red red bismuth.

In the present invention, the manufacturing method for photoluminescence of the crayon is a mixture of alumina component in the required amount of inorganic fluorescent pigment or natural stone filler in a high-speed mixer of 1000 RPM or more by mixing a suitable amount of dispersant and stirred for 30 minutes, and then preheated the spindle It is necessary to mix the required amount into oil or wax and to perform cooling molding.

Therefore, the present invention will be described in more detail with reference to an unlimited working example for the photoluminescence luminescence of crayons using the phosphorescent filler used in the present invention.

Example

Table 1 shows an example of a case where a filler is used according to alumina content after mixing and mixing a predetermined amount for each compounding ingredient in the conventional crayon preparation.

Table 1

The higher the content of alumina in the filler, the more excellent the photoluminescent effect is. In the case of photoluminescence time, it tends to decrease when using a filler with a little alumina content due to the interference of other impurities in the filler when absorbing light.

On the other hand, it can be seen that the photoluminescence effect according to the increase and decrease of the filler amount is shown in Table 2.

Table 2

As shown in Table 2, when the alumina content is increased, when the alumina content is low, the photoluminescence efficiency tends to be somewhat decreased, but when the alumina content is 40% or more, almost similar results are obtained.

However, if it is possible to shorten the luminous time if necessary, by adjusting the amount of the luminous pigment can be easily commercialized.

Therefore, in the present invention, when using a conventional filler and a filler with a low alumina content, a comparative example for the degree of the photoluminescent effect was obtained as shown in Table 3.

Table 3

Note) Calcium carbonate is the main component of the filler except for the alumina component.

As can be seen from the above results, when the alumina content is low, there is no photoluminescence effect, and when the calcium carbonate type having a high refractive index in the filler is mixed, it can be seen that the photoluminescence effect is greatly reduced.

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Claims (2)

Method for preparing photoluminescent crayons containing 1% or more by weight of phosphorescent pigment, 20 to 80% by weight of phosphorescent filler, 20 to 80% by weight of oil, and some other constitution improving agent Filler for enhancing photoluminescence in claim 1 is a natural stone or composite containing 20% by weight or more of alumina (Al ₂ O ₃ ) as the main component.