KR100415807B1 - Method for manufacturing a fluorescent and transparent toy ball - Google Patents

Abstract

The present invention is to prepare a raw material by combining 5wt% fluorescent pigment and 0.0025wt% UV blocker with respect to 100wt% EVA substrate; Melting and transferring the raw materials while maintaining the temperature at about 70 ° C; And molding the raw material in the molten state into a mold and then injecting air to maintain a thickness of 0.2 to 0.5 mm. It characterized in that it comprises a step of cooling it.

Thereby, it is effective to avoid monotonous opacity of color as a child's toy and to improve a variety of varieties by mixing appropriate pigments.

Description

Fluorescent transparent ball for toys and its manufacturing method {Method for manufacturing a fluorescent and transparent toy ball}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toy ball, and more particularly, to a fluorescent fluorescent ball for toys and a method of manufacturing the same, which avoid monotonous opacity of color as a child's toy and promote high quality of various kinds by blending appropriate pigments.

Typically, a toy ball is blended with 3 wt% of master beach pigment with respect to 100 wt% of raw material EVA (ethylene vinyl acetate) so that coloring is formed. At this time, the master beach is a pigment of a plastic type mixed with a resin and a powder, it is easy to mix with the raw material does not require a lot of labor according to the manufacturing.

Specifically, the raw material blended with the EVA and the master beach is periodically put into the hopper in a state of adjusting the working temperature to 120 ℃. When the raw material falls from the hopper into the mold through the screw and then cools with water while injecting air into the mold, the finished balls are produced in the mold.

However, master beach is added to the fat sugar component, a white inorganic pigment, also called white titanium. Titanium Dioxide has a high specific gravity and is most chemically stable, and has excellent coloring power, hiding power, and light resistance under natural conditions. However, due to this hiding power, it is possible to produce only balls of opaque primary colors.

Therefore, an object of the present invention is to solve the above problems, and to provide a method for producing a fluorescent transparent ball for toys that avoids monochromatic opacity as a toy for children and promotes a high quality of various kinds by blending appropriate pigments.

In order to achieve the above object, the present invention comprises the steps of producing a raw material by combining a fluorescent pigment 5wt% and UV blocking agent 0.0025wt% with respect to 100wt% EVA substrate; Melting and transferring the raw materials while maintaining the temperature at about 70 ° C; And molding the raw material in the molten state into a mold and then injecting air to maintain a thickness of 0.2 to 0.5 mm. It characterized in that it comprises a step of cooling it.

As another feature of the invention, the fluorescent pigment is blended with the flow using a powdered state.

Accordingly, the use of a device having a hopper, a screw, a mold, a compressor, a cooling mechanism, and the like as the main components in the manufacture of the toy ball is not significantly different from the conventional one, but a process using a transparent fluorescent pigment from which the sugar component is removed is used. With slightly different conditions, new types of products are created.

Hereinafter, preferred embodiments of the present invention will be described in detail.

First, with respect to 100% by weight of EVA substrate, 5wt% of fluorescent pigment and 0.0025wt% of UV blocking agent are mixed to generate a raw material. As the base material, EVA is made of a plastic material softened by adding acetic acid as a non-toxic resin. Fluorescent pigment removes fat component and produces clear and transparent fluorescent light, but it is more expensive than the conventional pigment and it is very difficult to work with master beach. Proper mixing of UV-blocking agent reduces the discoloration ability of fluorescence and maintains color for a long time.

As a specific example for manufacturing a fluorescent pigment having excellent weather resistance, light resistance and solvent resistance, the following process may be applied.

As the base resin, urea and aromatic sulfonamide were dissolved together with paraformaldehyde and water, followed by condensation reaction with stirring to prepare an amino resin polymer, and a reactor equipped with a cooler and a high speed stirrer was used to prepare water, polyoxyethylene lauryl ether and methyl. After adding cellulose and adding rhodamine, an emulsion was prepared. The amino resin polymer and the organic acid curing agent were added and reacted while stirring the emulsion at high speed, followed by filtration and drying to obtain a fine powder fluorescent pigment.

Accordingly, the present invention is formulated with the flow using a fluorescent pigment in powdered state. Since master beach operation is not possible and powder powder is applied, it is preferable to add and mix a flow using a stirrer or the like.

On the other hand, pigments are generally classified into inorganic pigments and organic pigments, but are classified into colored pigments and white pigments according to color tones, and color pigments and extender pigments according to their use. In this case, the extender pigment is a transparent white pigment, and the refractive index is small, so that the amount and property of the pigment can be adjusted while maintaining transparency, and thus, the pigment can be appropriately added to the fluorescent pigment of the present invention to control the transparency.

Next, the raw materials are melted and transported while the temperature is maintained at about 70 ° C. If the temperature is maintained higher than this, the melting time is shortened to improve the productivity, but it is necessary to pay attention to proper temperature management because the characteristics of the fluorescent pigment may be damaged or lost.

The melting of the raw material by heat is carried out by mounting the heater downstream of the hopper or by mounting the heater on a screw for the proper transport of the raw material. In either case, allow sufficient preheating one hour before the operation so that there is no temperature change in the actual work process.

Finally, the raw material in the molten state is injected into the mold and then air is injected to shape the thickness to maintain 0.2 ~ 0.5mm. If the molding thickness of the raw material is less than 0.2mm, the air injected into the material is concentrated at a specific part of the surface where the surface is vulnerable, so that uneven pressure is applied. Therefore, the defective rate is very high, such as forming a distorted sphere, and the molding thickness is 0.5. In the case of exceeding mm, the permeability is greatly degraded, resulting in the loss of the function of the transparent ball.

This is followed by a step of cooling it. When the raw material is put into the mold through the screw, the mold is engaged and air is injected and cooling proceeds. At this time, the cooling time is preferably kept longer than the conventional process.

After the cooling is completed, the mold is opened to release the finished ball and continue with the continuous process.

When passing through the process of the present invention, the output per hour is reduced to about 2500 to about 1500, but it is possible to produce a variety of products using the conventional device configuration as it is.

According to the above structure and effect | action, this invention has the effect to avoid monotonous opacity primary color as a toy for children by mix | blending a suitable pigment, and to aim at high quality of various kinds.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

Claims (3)

Consists of 5wt% of fluorescent pigment and 0.0025wt% of UV blocking agent, respectively, with respect to 100wt% of EVA base material, and has a thickness of 0.2 ~ 0.5mm and maintains stable sphere shape by having at least one reinforcing band around it. Fluorescent transparent ball for toys, characterized in that. Generating a raw material by combining 5 wt% of a fluorescent pigment and 0.0025 wt% of a UV blocking agent with respect to 100 wt% of an EVA substrate; Melting and transferring the raw materials while maintaining the temperature at about 70 ° C; And Injecting the molten raw material into a mold and then injecting air to form a thickness of 0.2 to 0.5 mm; Method for producing a fluorescent transparent ball for toys comprising the step of cooling it again. The method of claim 2, The fluorescent pigment is a method of manufacturing a fluorescent transparent ball for toys, characterized in that combined with the flow using a powdered state.