JPS6219239A - Production of coated material of fat and oil prevented from eluting - Google Patents

Abstract

PURPOSE:To prevent a coated material from eluting in water by making the following mixture the temp. higher by specified temp. than m.p. of solid fat and oil, cooling and solidifying it in the production of the coated material wherein heated and melted solid fat and oil and a powdery water soluble substance to be protected are mixed and cooled. CONSTITUTION:A water soluble core substance (e.g. sorbic acid or the like) is added to a mixture using heated and melted solid hardened fat and oil (e.g. hardened tallow oil or the like) and both wax and a surfactant in combination therewith if necessary, mixed and sufficiently dispersed. In this case, the heating and melting temp. is regulated to the range of +5-+25 deg.C of m.p. of solid fat and oil. Then, this dispersed liquid is cooled and solidified with a spray- cooling method to obtain a coated material. The degree of elution of the core substance which is obtained by adding 1-0.5% coated material into water at 40 deg.C and vibrating the mixture for 3-5hr is remarkably low.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for coating a water-soluble substance with a waterproof solid oil and fat, in which the elution rate of the coating into an aqueous solution is reduced.

[Conventional technology]

Conventionally, in order to protect food, feed, and pharmaceuticals in environments with water, protective coatings have been manufactured by heating and melting waterproof solid oils, mixing and dispersing them in the mixture, and cooling and solidifying them. It's been done.

In foods, organic acids and nucleic acid seasonings are coated with solid fats and oils, and elution is prevented in aqueous foods at room temperature.By heating above the melting point of the solid fats, the protective coating is broken and the organic acids and nucleic acid seasonings are Some are eluted and express their original functions.

In feed, the amino acids used for feed enrichment for ruminants are reversed to prevent the amino acids from becoming ineffective by preventing their elution in the rumen, and in the small intestine and beyond, as fats and oils are digested, the amino acids are Examples include coatings that are eluted and absorbed.

When manufacturing the above-mentioned coatings, conventional methods for reducing elution into water include increasing the particle size of the coating (Japanese Patent Publications No. 42-1470 and No. 53-A1476).
Shaking and colliding coating particles with each other (Special Publication No. 58-319
03), in which the core material is surface-treated with a lipophilic surfactant and then coated with oil (Japanese Patent Publication No. 55-28677).

However, these methods have different effects depending on the type of core material, and are subject to particle size limitations depending on the application.

[Means for solving problems]

By carefully examining the manufacturing process of the coating, the present inventors discovered that
As a result of various studies to see if there is a general method for reducing the dissolution rate, we found that when dispersing the core substance into heated molten oil and fat and solidifying it by cooling, keeping the temperature within an appropriate range before cooling significantly reduces the dissolution rate. They discovered that it is effective and completed the present invention.

The present invention provides a method for dispersing, cooling and solidifying a core material using a solid hardened oil as a main component, which is characterized in that the temperature before cooling and assimilation is set within a range of 5°C to 25°C above the solidification temperature. It is a method of manufacturing something.

Core substances to be coated in the present invention include foods, food additives, feeds, and pharmaceuticals, such as sorbic acid, aspartame, 5'-ribonucleotides, and lysine.

The coating material for the core material is solid hardened fats and oils, such as hardened beef tallow, hardened castor oil, hardened rapeseed oil, etc., waxes that are heated and melted (such as beeswax and carnapara wax), and surfactants. (eg, monoglystearate, nrubitan oleate), etc. may also be added.

The commonly used method of cooling and solidifying is the spray cooling method (
The spray cooling method), the dropping method on a cooling belt, the flaker method using a cooling drum, etc. are used.

The suspension supplied to this cooling and solidifying machine is prepared by adding and mixing a core substance to heated and melted solid oil, wax, and surfactant, and thoroughly disperses the mixture. The temperature of the supplied liquid is set to between +5° C. and +25° C. above the melting point, but if necessary, it is heated while avoiding local heating. Regarding the temperature of the supplied liquid, there has been no literature that has examined the relationship with the elution prevention effect, and in the examples it was simply maintained at a temperature of 70 to 80°C to ensure mixing and dispersion.
32217), and -1, which is usually dispersed and suspended in a coating material heated and melted at 70 to 120°C. It is desirable to keep the heating melting temperature within +5 to +25° C. of the melting point after adding the core material to be protected. If the temperature is higher than the above temperature, even if it is cooled to the above temperature range and solidified, the elution rate, which is a measure of the elution prevention effect, may be higher than that of the temperature range from the beginning. (See Example 1).

Regarding the melting point, the temperature measured after cooling and solidification but before β crystallization of the fat and oil has progressed is used. As β crystallization progresses, the melting point increases, and the temperature may rise significantly (see Example 3).

Originally, the solidification temperature should be used instead of the melting point, but since supercooling is common and the solidification temperature range is wide, it is possible to prevent elution by using the melting point and limiting the suspension temperature. The reason why the effect is enhanced is not clear, but it is speculated as follows.

If the temperature of the liquid is high, the degree of thermal contraction of the liquid and the cooled and solidified product is large and defects are likely to occur, and the solidified product tends to have an amorphous structure that is difficult to form a crystalline structure, and there are many pores through which water can diffuse. It is considered that this makes it easier for water to enter, and the waterproofing effect becomes lower. On the other hand, if the liquid temperature is too low, the viscosity will increase and the core substance will not be sufficiently dispersed, and some oil and fat wax will crystallize, resulting in incomplete coating and increased elution. considered to be a thing.

Examples will be explained below.

As a measure of the elution prevention effect, 1 to 0.5 thick of the coating was added to water at 40°C, and after shaking for 3 to 5 hours, the elution rate of the core substance that began to dissolve was used.

Example 1 70 parts of extremely hardened beef tallow was heated and melted to a predetermined liquid temperature (63~
After heating to +5°C (83°C), 30 parts of fine powder of sodium 5' guanylate was added as a core material, immediately mixed and dispersed, and heated while stirring to the specified liquid temperature shown in Table 1 without overheating. did. This suspension was granulated by spray cooling using a single-fluid spray nozzle.
A section of ~420 microns was taken and the water elution rate was measured at 3 hours. The melting point of each coating is 58°C;
The melting point after heating and aging for 1 hour was 62°C. The results are shown in Table 1.

Table 1 clearly shows that the elution prevention effect is improved when the difference between the liquid temperature and the melting point is within an appropriate range.

In addition, in order to see the effect of rising liquid temperature, the 90″C suspension was heated to 70°C.
The suspension was cooled for about 30 minutes, spray-cooled, and the elution rate was measured to be 9%, which is inferior to 4th case in which the temperature of the suspension does not rise above 70°C, which is inferior in elution prevention effect. The melting point was also 58°C.

Example 2 Carex glaze ring was carried out in the same manner as in Example 1, using extremely hardened rapeseed oil as the coating material and fine powder of sodium 5' guanylate as the core material. This vfAI! As a Jt atomizer, a two-fluid nozzle was used, and the air was heated to a temperature of 70°C to prevent local solidification of fats and oils @ After spray cooling,
Sieve, collect 350-420 micron sections, and heat at 50°C.
The mixture was heated and aged for 60 minutes, and the dissolution rate was measured at 3 hours. Melting point is 62°C after spray cooling and 68°C after ripening.
Met. The results are shown in Table 2.

Table 2 Despite the inclusion of a heating and aging step, there is a range in which the dissolution prevention effect is enhanced due to the difference between the suspension temperature and the melting point.

In order to examine the effect of the difference between the cooling source and the suspension temperature, the air temperature for the two-fluid nozzle was set at 30°C, and the dissolution rate of coated particles observed when spray cooling the suspension at a liquid temperature of 75°C was 10. %
There is no significant difference from the 9th grade when the air temperature is 70℃,
The F difference between the suspension temperature and the melting point is more effective.

Example 3 60 parts of fecalized beef tallow was used as a coating material, heated and melted, and heated to a predetermined liquid temperature +10°C to form DL-methionine powder 4.
0 part was added, mixed and dispersed, and heated to a predetermined liquid temperature. Next, drop it onto a solidification belt conveyor kept at a constant temperature, and
After ~2 minutes of assimilation, the particle size ranges from 2.00 to 2.
The 83cm fraction was sieved and collected, and the melting point was 59°C. The grains were heated and aged at 55° C. for 10 minutes to obtain coated grains, and the dissolution rate was measured at 5 hours in order to make the grains hard.

The results are shown in Table 3.

Table 3 Unlike the spray cooling method in Examples 1 and 2, the liquid temperature effect was not so great, probably because the cooling solidification time was longer.
Again, there is an appropriate temperature range.

Note that the lower the conveyor surface temperature, that is, the cooling surface temperature, the lower the elution rate tends to be, but the effect of liquid temperature is greater.

Claims (1)

[Claims] In the method of obtaining a granular coating by heating and melting solid oils and fats as a coating material, mixing powdered water-soluble substances to be protected, and cooling and solidifying the mixture, the temperature of the mixture before cooling is set to the melting point of the solid oil and fat. A method for producing an oil and fat coating that is prevented from elution, which comprises heating the product to a higher temperature of 5 to 25° C. and solidifying it by cooling.