KR100762956B1 - A manufacturing method for luminescent paint starch form - Google Patents

Abstract

A method for manufacturing colored luminescent starch foams is provided to produce the luminescent foams that absorb lights emitted from the sun and illumination and emit the lights in dark places and have various colors by using light-storage pigments and various colorants. A method for manufacturing colored luminescent starch foams for arts or toys and stationery includes a step of mixing a material mixture with 2-20 parts by weight of a light-storage pigment, 0.05-1.0 parts by weight of an edible colorant, 0.2-2.0 parts by weight of a mixing improver, and 0.2-2.0 parts by weight of an extrudable improver, wherein the material mixture comprises 60-85 parts by weight of a starch, 10-30 parts by weight of PVA, and 5-15 parts by weight of glycerine. The light-storage pigment contains strontium aluminate particles having a particle size of 5-100mum.

Description

A manufacturing method for luminescent paint starch form

The present invention relates to a modeling play product using starch, and in more detail, in a general method for preparing starch foam in which starch, PVA, and plasticizer are mixed, an aluminum-based photoluminescent pigment is added to accumulate light energy, and an extrusion improving agent. The present invention relates to a method for preparing colored photoluminescent starch foam, which is prepared by adding monoglyceride as a color to prevent color modulation of the composition, adding calcium phosphate as a mixing modifier to uniformly mix the composition, and colored by the addition of a pigment.

In the conventional children's play equipment, starch foam made of starch is attached using water, and through this, children's play equipment for forming various types of moldings is manufactured and sold.

However, there is a problem that the conventional formative play equipment using starch foam has a lot of constraints of the formative play using it because it is impossible to play the model without lighting or natural light.

On the other hand, when manufacturing sculptures using starch foam by adding photoluminescent property, it is impossible to produce starch foams of various colors, and it is impossible to manufacture starch foams of various colors, which results in limitation of color expression in works. It was difficult to be widely used for artwork or stationery for students.

Accordingly, the present invention has been made in view of the above-described conventional problems, and a first object of the present invention is to accumulate light such as sunlight or a lamp during the day by using a phosphorescent pigment so that it can emit light in a dark place. By adding various pigments, there is provided a colored photoluminescent starch foam which can be produced in various colors.

It is a second object of the present invention to provide a manufacturing method which is harmless to the human body in manufacturing luminous luminous phosphorescent starch having luminous properties, which can reduce manufacturing costs and increase economic efficiency and maximize luminous properties. .

An object of the present invention as described above is produced for art or toys and stationery, in the manufacture of starch foam to form a sculpture by adhering the starch with water,

To a material mixed with 60 to 85 parts by weight of starch, 10 to 30 parts by weight of PVA, and 5 to 15 parts by weight of glycerin, 2 to 20 parts by weight of phosphorescent pigment, 0.05 to 1.0 parts by weight of food coloring, 0.2 to 2.0 parts by weight of mixing modifier, and extrusion It is achieved by mixing and manufacturing in the mixing ratio of 0.2-2.0 weight part of growth agent.

On the other hand, the photoluminescent pigment is composed of a strontium aluminate having a particle size of 5㎛ to 100㎛, as a photoluminescent pigment of a preferred embodiment of the present invention, it is to use a strontium aluminate having a particle size of 5㎛ 15㎛ desirable.

In addition, the food coloring is food coloring red dye No. 2, food coloring red No. 40, food coloring blue No. 1, food coloring yellow No. 4, food coloring yellow No. 5 in the food synthetic synthetic dyes licensed in Korea It can be prepared by mixing one or more of the arcs.

On the other hand, the mixing modifier is to be prepared by mixing and mixing calcium phosphate, magnesium oxide, calcium stearate alternatively, it is preferable to be made of calcium phosphate as a mixing modifier of a preferred embodiment of the present invention.

In addition, the extrudable modifier is mixed with the fatty acid ester such as monoglycerides, diglycerides, triglycerides and the like is prepared and prepared, as an extrudable modifier of a preferred embodiment of the present invention, it is preferably made of monoglycerides.

On the other hand, in the present invention, after mixing each of the mixed materials, it can be prepared including an extrusion molding step of heating at an internal temperature of 100 ~ 200 ℃ extruder inlet.

These and other objects, advantages and features of the present invention will become more apparent from the following detailed description.

The present invention is prepared for art or toys and stationery, in the production of starch foam to form a molding by adhering starch with water, mixed with 60 to 85 parts by weight starch, 10 to 30 parts by weight PVA and 5 to 15 parts by weight glycerin The prepared material is prepared by mixing 2-20 parts by weight of the phosphorescent pigment, 0.05-1.0 parts by weight of food coloring, 0.2-2.0 parts by weight of the mixing modifier and 0.2-2.0 parts by weight of the extrudable improving agent.

On the other hand, the photoluminescent pigment of the mixed material is preferably composed of strontium aluminate having a particle size of 5㎛ to 15㎛, which is easy for those skilled in the art to only strontium aluminate having a particle size of 5㎛ to 100㎛ You may choose to carry out.

In addition, the food coloring is food coloring red dye No. 2, food coloring red No. 40, food coloring blue No. 1, food coloring yellow No. 4, food coloring yellow No. 5 in the food synthetic synthetic dyes licensed in Korea It can be prepared by mixing one or more of the arcs.

The mixing modifier of the present invention is preferably to use calcium phosphate, but may be prepared by mixing the magnesium oxide, calcium stearate alternatively to facilitate those skilled in the art.

On the other hand, the extruded modifier is preferably mixed using a monoglyceride, it can be prepared by mixing the fatty acid esters, such as diglycerides, triglycerides, etc. for easy practice by those skilled in the art.

In addition, after mixing each of the mixed materials in a predetermined ratio, it may be prepared including an extrusion molding process for heating at an internal temperature of 100 ~ 200 ℃ extruder inlet.

The method of manufacturing the colored photoluminescent starch foam of the present invention constituted as described above is performed by adding photoluminescent pigment and mixing light energy in the manufacturing method of starch, PVA (PolyVinylAlcohol) and glycerin (Glycerol). The photoluminescent starch foam was prepared to emit light after spontaneously accumulating, and specific mixing ratios of the mixed materials will be described in detail for the correct embodiment of the present invention.

Of the mixed materials, the starch is a main component for forming starch foam, and those skilled in the art can easily select and mix among general starches such as corn starch, wheat starch, tapioca starch, potato starch, etc. which are commercially available in large quantities.

In the mixing ratio of the starch, when the starch foam to be mixed when mixed to 60 parts by weight or less is too thin, when it is 85 parts by weight or more, the starch foam is excessive compared to other mixed materials and mixed with other photoluminescent pigments and food coloring There is a problem in that the effect of adding the modifier and the extrudable modifier is lowered, and the mixing ratio is limited to 60 to 85 parts by weight of starch in order to properly carry out the present invention.

On the other hand, the PVA (PolyVinylAlcohol) is a mixture added to improve the adhesion of the starch foam, is an environmentally friendly material with excellent stability in water solubility, in the mixing ratio for forming starch foam, to 10 parts by weight or less When mixed, the adhesion of starch foam is poor, and it is not smooth to form starch foam. If it is mixed by 30 parts by weight or more, the adhesion of starch foam is increased. Since there is a problem that the unit cost rises, it is preferable that the PVA is mixed in an amount of 10 to 30 parts by weight.

In addition, the glycerin is mixed with starch to give plasticity, thereby improving the extrusion processability, and as an additive to improve the resilience of the starch foam, it is an excellent safety material used for food.

In adding the glycerin, the present invention is limited to the mixing ratio of 5 to 15 parts by weight, which is extremely small compared to the ratio of the starch of 60 to 85 parts by weight when glycerin is mixed at 5 parts by weight or less. There is a problem in that the provision of plasticity is not satisfactory, and therefore the extrusion process is not easy, there is a problem that the plasticity of the starch is increased when mixed with more than 15 parts by weight, the flexibility is excessive when the starch foam is manufactured, it is not possible to achieve a smooth molded product.

On the other hand, starch foam is added and mixed with luminous pigment so that it accumulates light and emits light at night, which is harmless to human body even when bite or frequent physical contact with starch foam is mainly used by young children. It is preferable to be mixed with an aluminum-based phosphorescent pigment, and as a preferred embodiment of the present invention, strontium aluminate (SrAl ₂ O ₄ , SrAl ₂ O ₃ ) is used as a phosphorescent pigment, and the strontium aluminate is harmful to the human body. It is a photoluminescent pigment that is widely used indoors and outdoors because it has no radiation emission, maintains a long light emission time, and has excellent weather resistance.

In addition, in order to uniformly mix the strontium aluminate, calcium phosphate is added as the mixing modifier so that the strontium aluminate is uniformly distributed and mixed with other mixed materials, and the strontium aluminate of Due to the mixing, an extruder is added to prevent the blackening phenomenon that the starch foam is changed to black during extrusion using the extruder.

According to a preferred embodiment of the extruder improver, the present invention maintains the original color of the composition by the addition of monoglycerides, in the production of starch foam formed through a variety of mixed materials, minimizing the amount of photoluminescent pigment At the same time, it adopts and mixes the photoluminescent pigment that can maximize the luminescence.

In addition, in order to prepare a colored starch foam is mixed by adding the food coloring of a variety of colors, the food coloring is a food coloring red dye No. 2 (Amaranth), food coloring red among the food synthetic coloring dyes approved in the country Select at least one or more of No. 40 (Allura red), No. 1 Brilliant blue FCF, No. 4 Tartrazine, No. 5 By mixing, but limited to the addition amount in order to prevent the light emission and deterioration of photoluminescence due to the food coloring is added.

On the other hand, when extruded by mixing the starch, PVA, glycerin mixed with a phosphorescent pigment, food coloring, mixing modifiers, extrudable modifiers, in order to improve the foaming rate by adjusting the extrusion conditions, single or twinscrew In the case of a conventional extruder, extrusion molding is performed, and in the case of a general extruder, a horizontal screw has a rotating screw, an inlet is formed at one end thereof, and a discharge plate is equipped with a forming plate and a rotary cutter, and the type of forming plate and rotation of the cutter It can be molded into various shapes according to the speed.

In performing the extrusion process using the extruder, it is preferable that the extruder selects a twin screw extruder and maintains the inlet / internal temperature of the extruder at 130 to 180 ° C., but it is 100 to 200 for a person skilled in the art to easily carry out. It may be extruded at a temperature of ℃.

The configuration of the extruder is a conventionally used extruder is easily selected by those skilled in the art used, detailed description thereof will be omitted.

Hereinafter will be described in more detail through a preferred embodiment of the present invention.

In the mixing ratio for correct implementation of the present invention as described above, 70 parts by weight of starch, 20 parts by weight of PVA, and 10 parts by weight of glycerin are mixed and foamed at high temperature / high pressure to have a height of 2 to 3 mm and a diameter of 1 to 1.5 mm. The extrusion molding of cylindrical starch foam is carried out in common, but according to each embodiment, the addition amount and particle size of the phosphorescent pigment, the addition amount of the mixing modifier, the extrudability improving agent and the food coloring, the extrusion temperature of the extruder, etc. Was compared in different ways.

On the other hand, in the following Examples, the luminance (point) indicating the degree of light emission was measured by visual observation after leaving the starch foam added with the phosphorescent pigment for about 1 hour in a dark room, after 30 minutes irradiation in a general fluorescent lamp. In the method of visually measuring luminance, the degree of luminance was scored using the item scale used in the sensory test.

The standard of luminance is "0 light emission, 1 point light emission can be felt, 1 light emission is very low, 2 light emission is low, 3 light emission is low-middle 4 points, light emission is middle 5 points, light emission is low. Medium-strong 6 points, luminescent strong 7 points "were determined.

First embodiment

As a first embodiment of the present invention, the strontium aluminate having an average particle diameter of 70 μm in aluminum series, which is a phosphorescent pigment, is added in different amounts (parts by weight), mixed, and then foamed at high temperature / high pressure to form photoluminescent starch. Foams were prepared and their brightness was compared and the results are shown in Table 1.

<Table 1>

Phosphorescent pigment addition amount (part by weight) Appearance color Luminance (dots) No addition White 0 5 White 5 10 Light brown 4 15 Earth color 3

As shown in Table 1, it can be seen that the starch foam to which the photoluminescent pigment is added has photoluminescence property compared to no addition. When the photoluminescent pigment becomes more than a certain weight part, the exterior color gradually changes to earthy color and luminance. It can also be seen that the decrease.

On the other hand, in the experiment, the photoluminescent pigment is not evenly distributed, and the photoluminescent pigment is divided into a part and a weak part, and it was confirmed that the problem of the brightness of the same starch foam does not match.

Second embodiment

After adding 15 parts by weight of the strontium aluminate having an average particle diameter of 70 µm, which is the phosphorescent pigment of Example 1, and mixing calcium phosphate as a mixing modifier and monoglyceride as the extruding agent, 0.2 to 2.0 parts by weight, respectively, were compared. The results are shown in Table 2.

<Table 2>

Additive type Appearance color Luminance (dots) No addition Brown 3 Calcium phosphate Light brown 4 Monoglycerides Light green 4 Calcium Phosphate + Monoglycerides Light green 6

As shown in Table 2, the starch foam added with calcium phosphate and monoglyceride, respectively, is light brown and light pale green, and it can be seen that the brightness is improved while maintaining a unique color as compared to the starch foam without addition.

In detail, the calcium phosphate mixing modifier improves the distribution of phosphorescent pigments for the purpose of mixing, and the brightness is improved. The starch foam mixed with the monoglyceride extruder improves the pale light green color. It can be seen that the luminance is improved.

In addition, when both the mixing modifier calcium phosphate and the extrusion modifier monoglycerides were mixed, the appearance color was pale light green, maintaining the original color, the distribution of the photoluminescent pigment is good, and as a result shows the best brightness Can be.

Third embodiment

In forming the starch foam in which calcium phosphate and monoglyceride were mixed in the second embodiment, the particle size of the phosphorescent pigment was mixed and mixed, and after foaming at high temperature / high pressure, the brightness was compared to Table 3 below. Indicated.

<Table 3>

Phosphorescent Pigment Average Particle Size (㎛) Appearance color Luminance (dots) 10 Light green 7 20 Light green 7 40 Light green 6 70 Light green 6

As shown in Table 3, the brightness change according to the particle size of the photoluminescent pigment was found, and the larger the particle size, the lower the brightness, and on the contrary, the smaller the particle size, the higher the brightness.

Fourth embodiment

In the third embodiment, when mixed with a photoluminescent pigment having a particle size of 40㎛, and extrusion molding at high temperature / high pressure through an extruder, the foaming rate and brightness of the starch foam is compared by varying the inlet / internal temperature It was.

The method of measuring the foaming rate measures the weight (W) of 20 or more cylindrical photoluminescent starch foam samples, mixes all of these starch foams with 600 ml of crude (one type of grain), and puts them in a 1000 ml measuring cylinder. Position it in the middle of this group.

Since the total volume (V) was measured by tapping the cylinder until the volume does not change, and the foaming rate was measured by substituting the formula of (V-600) / W, and the results are shown in Table 4.

<Table 4>

Extrusion Temperature (℃) Foam Rate (ml / g) color Luminance (dots) 150 34.4 Light green 6 180 42 Light green 7

As shown in Table 4, it was confirmed that as the extrusion temperature is increased, the foaming rate is increased by about 22%, and with this, the brightness is improved.

However, when the extrusion temperature rises above 200 ° C., the starch foam itself may be damaged by heat, and at the same time, the brightness may decrease rapidly.

Fifth Embodiment

After the addition of 5 parts by weight of the phosphorescent pigment having an average particle diameter of 10 μm and the conditions of the first embodiment, red, blue, and yellow, which are food colorings, were added and mixed, and foamed at high temperature / high pressure to form photoluminescent starch foam. Were prepared, and their coloring properties and luminance were compared with those shown in Table 5.

<Table 5>

Type of pigment Addition amount (%) Colorability (dot) Luminance (dots) No addition 0 White 7  Red 0.1 4 4 0.2 5 2 0.3 6 One  blue 0.1 4 5 0.2 5 4 0.3 6 2  yellow 0.1 3 6 0.2 3 5 0.3 5 4

As shown in Table 5, the higher the amount of food coloring, the higher the colorability, but the luminance decreases, and in order to maintain the level of four points, the average score of colorability and luminance, 0.1% red and 0.2% blue. It is understood that it is preferable to mix with yellow 0.3%.

In addition, considering that the added photoluminescent pigment is 5 parts by weight, when the pigment is not added, it shows seven points having the highest luminance, and it can be seen that high luminance can be obtained even if the mixing ratio of the photoluminescent pigment is lowered. .

By calculating the mixing ratio of the mixed material of the present invention by combining the results obtained through the above embodiments, the phosphorescent pigments should be mixed at 5 to 10 parts by weight, but the calcium phosphate of the mixing modifier to prevent blackening High brightness can be obtained even if it mixes 5 weight part or less or 15 weight part or more.

However, when the phosphorescent pigment is mixed at 2 parts by weight or less, it is difficult to exhibit the phosphorescence property. When the phosphorescent pigment is mixed at 20 parts by weight or more, the brightness of the phosphorescent pigment of the present invention is less than the increase in the mixing amount of the mixing modifier. It mixes by weight part.

In addition, the mixing ratio of the food coloring is preferably 0.1 to 0.3 parts by weight, but is not only red, blue, yellow of the right embodiment of the mixing of the respective colors or by those skilled in the art easily carried out according to the coloring or brightness It is a mixing ratio for mixing, when it is mixed at 0.05 parts by weight or less, coloring of food coloring cannot be obtained, and when mixed at 1.0 parts by weight or more, the coloring becomes high, while the luminous and luminous effects of starch foam are extremely small. Since no photosensitivity can be exhibited, the food coloring is preferably mixed at 0.05 to 1.0 parts by weight.

 Therefore, the manufacturing method of the colored photoluminescent starch foam of this invention is 60-20 weight part of starch, 10-30 weight part of PVA, 5-15 weight part of glycerin, 2-20 weight part of luminescent pigments, and food coloring 0.05. Mixing with -1.0 parts by weight, 0.2-2.0 parts by weight of mixing modifier, and 0.2-2.0 parts by weight of extrudable modifier showed the highest brightness and uniform colorability and foaming rate.

On the other hand, as a right embodiment of the present invention, it was specified that the mixture is mixed by adding calcium phosphate as the mixing modifier, and monoglycerides as the extrudable improving agent, which is an embodiment of the present invention, the mixing agent is magnesium oxide (Magnesium oxide ), Calcium stearate may be alternatively mixed, and the extrudable improving agent may be alternatively mixed among fatty acid esters such as diglyceride and triglyceride.

By using the method of manufacturing the colored photoluminescent starch foam of the present invention, which is configured and functions as described above, it has a luminous property to accumulate light such as sunlight or an illumination lamp during the day by using a photoluminescent pigment and emit light in a dark place. By adding pigments, it is manufactured in various colors, and children combine with various colors in formative play, through which the ultimate effect of developing intelligence by learning colors through play.

In addition, it is suitable for children to use for playing by using the raw material harmless to the human body, it is effective to reduce the manufacturing cost because the brightness is bright even with mixing less expensive luminous pigments.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various other modifications and variations are possible without departing from the spirit and scope of the present invention. Are all within the scope of the appended claims.

Claims (6)

In the manufacture of starch foam for art or toys and stationery, to form starch by adhering starch with water, 60 to 85 parts by weight of starch, 10 to 30 parts by weight of PVA, 5 to 15 parts by weight of glycerin, 2 to 20 parts by weight of phosphorescent pigment, 0.05 to 1.0 parts by weight of food coloring, 0.2 to 2.0 parts by weight of mixing modifier, extrudability A method for producing a colored photoluminescent starch foam, characterized in that the mixture is prepared at a mixing ratio of 0.2 to 2.0 parts by weight of the modifier. The method of claim 1, The photoluminescent pigment is a method of producing colored photoluminescent starch foam, characterized in that consisting of strontium aluminate having a particle size of 5㎛ ~ 100㎛. The method of claim 1, The food coloring is food coloring synthetic dyes approved in Korea, food coloring red No. 2, food coloring red No. 40, food coloring blue No. 1, food coloring yellow No. 4, food coloring yellow No. 5 A method for producing colored photoluminescent starch foam, characterized in that the mixture is prepared by mixing one or more. The method of claim 1, The mixing improver is a method of producing colored phosphorescent starch foam, characterized in that the mixed production of calcium phosphate, magnesium oxide, calcium stearate alternatively. The method of claim 1, The extruded improving agent is a method of producing colored photoluminescent starch foam, characterized in that the mixed production of alternative fatty acid esters such as monoglycerides, diglycerides, triglycerides and the like. The method according to any one of claims 1 to 5, After the mixing of the starch, PVA, glycerin mixed material, photoluminescent pigment, food coloring, mixing modifier, extruding modifier in a predetermined ratio, and comprises an extrusion molding process for heating at an internal temperature of 100 ~ 200 ℃ extruder inlet Method for producing a colored photoluminescent starch foam, characterized in that.