JP6609393B1 - High protein content protein powder with enhanced sedimentation solubility in water - Google Patents

Abstract

An object of the present invention is to provide a high protein content protein powder containing 70% by mass or more of a high protein and easily dispersible by simply stirring with a spoon. [MEANS FOR SOLVING PROBLEMS] A diglycerin monooleate-coated protein powder in which a whole "core layer" made of a protein powder raw material having a protein content exceeding 70% is coated with a "coating layer" made of diglycerin monooleate is prepared by the following step (1). And (2). (1) A step of spraying a spray solution composed of a high-concentration aqueous ethanol solution in which diglycerin monooleate is dissolved with respect to the fluidized protein powder raw material, (2) drying the obtained diglycerin monooleate-coated protein powder, Removing ethanol. [Selection figure] None

Description

  TECHNICAL FIELD The present invention relates to a protein powder containing a high protein having improved sedimentation solubility in water and a method for producing the same.

  Due to the recent health boom, the demand for protein powder effective for efficiently increasing muscle mass and reducing body fat percentage is increasing rapidly. Protein powder is generally taken by dissolving in water, etc., but protein powder raw materials generally have poor dispersibility in water, and when added to water, only the surface of the powder gets wet and water reaches the inside. It does not penetrate, and the powder floats on the surface of the water and does not wet or settle, forming “mako” or “dama”. Once “mamako” or “dama” is formed, the powder does not disintegrate even when it settles in water, and the dispersibility is lowered. In particular, in the case of a protein powder (product) having a protein content of 70% by mass or more, it is difficult to wet, settle or disperse by hand stirring, and it is necessary to vigorously shake it with a shaker or the like. However, depending on the protein powder, even if you use a shaker, “Mamako” and “Dama” will not be resolved, and you may drink “Dama” or leave “Dama” in the shaker. Also, when a shaker is used, depending on the protein powder, foaming is severely observed, and an antifoaming agent may be blended to lead to difficulty in drinking. Moreover, when the fitting part of the shaker is not completely closed, there is a risk that the spilled area will be soiled.

Dispersibility is improved by adding a large amount of easily soluble components such as sugars, but the original diet effect of protein powder intake is impaired, so protein purity is an important factor in ingesting protein. . Milk-derived proteins are roughly divided into whey and casein, but whey is the one with a low molecular weight and fast absorption. Whey protein also has WPC and WPI depending on the purification method, and the whey purity is about 80% and about 90%, respectively. The difference in whey purity is about 10%, but this difference is often found in bodybuilders and those who want to reduce body fat percentage.
Since the protein content in the protein powder raw material (WPC, WPI, etc.) is so severely recognized, the protein powder (product) has also been devised to reduce the protein content as much as possible. That is, protein has a peculiar loss (smell) and slight bitterness, and it is difficult to drink as it is. Therefore, the taste is often adjusted by adding sweeteners and flavors. At that time, if it is a sweetener, an artificial sweetener having a higher sweetness is used, and a fragrance having the highest possible potency is selected. In the case of sweeteners, when sucrose, reduced maltose, etc. are used, satisfactory sweetness cannot be obtained unless they are blended at 7% or more, but artificial sweeteners can be sufficiently sweetened within 0.5%. In general, artificial sweeteners are blended.
Plant-derived materials may be selected as protein powder raw materials. For example, soybean protein extracted from soybean with high purity. This is preferred by more natural-oriented consumers, although some products may be shunned due to the blue odor. Like milk-derived proteins, it has peculiar skinnyness (smell) and slight bitterness, and it is difficult to drink as it is, so it is often conditioned by adding sweeteners and fragrances.

  Accordingly, there is a need to provide a protein powder containing a high protein that does not significantly reduce protein purity and has improved sedimentation properties in water. Here, when “settlement to water is high”, it means that even if a shaker is not used, it is dispersed just by gently stirring with a spoon.

It is widely known that a fluidized bed granulator is used as a technique for easily solubilizing a hardly soluble powder, and it is easy to enter water by granulating it into a bulky granule. The granulation method is also applied to poorly soluble high protein-containing powders, and the surface of the powder is wetted with an aqueous solution containing a surfactant or the like by a fluidized bed granulator to cause agglomeration. There have been proposed a plurality of examples in which a granulation method of forming large porous granules and drying them is applied.
For example, a method of spraying a water-containing liquid containing a surfactant such as sorbitan fatty acid ester and sugar ester into soybean protein powder under a fluidized bed to humidify and agglomerate (Patent Document 1), decaglycerin monofatty acid into whey protein powder A method in which an ester-containing aqueous solution is adhered with a fluidized granulator to form aggregated particles (Patent Document 2). A method of obtaining an easily soluble high protein-containing collagen powder by adding an aqueous solution containing diglycerin fatty acid ester to a mixed powder obtained by mixing 2% by mass or more of saccharide with collagen powder (Patent Document 3), etc. There is. In addition, high-protein-containing granules that are still poorly settled in water after granulation are mixed with an emulsifier while mixing granules that are still highly settled in water to obtain mixed granules with a large particle size. A method (Patent Document 4) has also been proposed.
However, even if it is said to be easily solubilized in the techniques of Patent Documents 1 and 2, the dispersibility in water requires mechanical stirring by a mixer. In the techniques of Patent Documents 3 and 4, gentle stirring by hand is required. Although it is easily soluble so that it can be dispersed, it is necessary to add at least 2% saccharides such as sucrose in Patent Document 3 and fat and oil such as salad oil in Patent Document 4 in addition to saccharides. It was a problem to raise the calorie intake with greatly lowering.

  As described above, it has been desired to provide a high-purity protein powder with a high protein content that does not contain components with high caloric intake such as sugars and fats and oils, which can be easily dispersed in water simply by gently stirring with a spoon. .

Japanese Patent Application Laid-Open No. 6-113749 JP 2009-242308 A Japanese Patent Laid-Open No. 2006-116494 International Publication No. 2006/117958

  The present invention is a protein powder having a high protein content that contains 70% by mass or more of high protein and hardly contains high-calorie components such as sugars and oils, and can be dispersed by simply stirring with a spoon without using a shaker. An object is to provide a possible easily soluble protein powder.

In order to easily dissolve a hardly soluble powder in water, it is common to aggregate the powder to form a bulky porous granulated product. When water penetrates into the porous gap, it settles and disperses and dissolves. Therefore, as a matter of course, the “aggregation granulation method” has been used also for easy solubilization of protein powder containing high protein. However, if the protein powder is made into an agglomerated granule with only a binder (a binder such as thickening polysaccharides and dextrins) or a surfactant, a poorly soluble granulated product will be formed. I have to mix powder. You can get a readily soluble protein powder, but you will also consume unnecessary calories.
Therefore, the present inventor has intensively studied a method for producing such easily soluble high protein-containing protein powder, and completely changed the idea, and the protein powder was precipitated and dispersed in water using only a surfactant. After studying whether improvement could be achieved, we developed a method for coating protein powder directly with a surfactant dissolved in a high-concentration ethanol solution.
Specifically, high-protein protein powder derived from milk that has been fluidized in a fluidized bed is granulated so as not to cause aggregation by spraying a high-concentration ethanol solution of diglycerin monooleate with a spray nozzle. . Ethanol was completely removed by subsequent drying treatment to obtain diglycerin monooleate-coated protein powder.
The obtained protein powder was poured into water and gently stirred with a spoon for 10 to 30 seconds. No powder residue was found on the water surface, and no undissolved residue was found on the bottom surface. The inventors have found that the above-mentioned problems can be achieved by obtaining the above results, and have completed the present invention.

That is, the present invention includes the following inventions.
[1] Diglycerin monooleate-coated protein powder having high sedimentation solubility in water, covering a “core layer” made of a protein powder raw material with a protein content exceeding 70% and the entire “core layer” A coated protein powder comprising a “coating layer” made of diglycerin monooleate.
[1-1] The coated protein powder according to [1], wherein the protein powder raw material is selected from at least one of the group consisting of WPC, WPI, MPC, MPI, MCI, TMP, and soybean protein powder.
[1-2] The coated protein powder according to [1], wherein the coated protein powder has an average particle size of 40 to 170 μm.
[1-3] The coated protein powder according to [1], wherein the coated protein powder does not form aggregated granules.
[1-4] The coated protein powder according to [1], wherein the “coating layer” made of diglycerin monooleate has a rough structure by evaporation of ethanol.
[1-5] The coated protein powder according to [1], wherein the concentration of diglycerin monooleate relative to the protein powder raw material is 0.05 to 3% by mass. In addition, Preferably it is 0.1-2 mass%, More preferably, it is 0.3-1.5 mass%, Most preferably, it is 0.5-1.2 mass%.

[2] A method for producing diglycerin monooleate-coated protein powder having high sedimentation solubility, comprising the following steps (1) and (2):
(1) A step of spraying a spray solution comprising a high-concentration ethanol aqueous solution in which diglycerin monooleate is dissolved with respect to a fluidized protein powder raw material,
(2) A step of drying the obtained diglycerin monooleate-coated protein powder to remove ethanol.
[2-1] In the above [2], the apparatus for fluidizing the protein powder raw material is any one selected from a fluid bed granulator, a stirring granulator, and a miller. The manufacturing method as described.
[2-2] The manufacturing method according to [2], wherein the ethanol concentration of the high-concentration ethanol aqueous solution is 60% or more. In addition, Preferably it is 70% or more.
[2-3] The content of diglycerin monooleate is 0.5 to 20% by mass with respect to 100% by mass of diglycerin monooleate high-concentration ethanol-containing aqueous solution. Manufacturing method. In addition, Preferably it is 1-10 mass%, More preferably, it is 2-7.5 mass%, Most preferably, it is 3-6 mass%.

The protein powder of the present invention easily settles in water and rapidly disintegrates after settling, so a shaker or the like is unnecessary, and it is extremely easy to drink because it shows good dispersibility just by light stirring. And, according to the present invention, it is possible to provide an easy-to-drink product that contains almost no high-calorie ingredients such as sugars and oils and contains a high-purity protein of 70% by mass or more, so that the muscle mass is efficiently increased. As a protein powder to reduce body fat percentage, it is a gospel for athletes who want muscle strengthening and those who are seeking diet.
Moreover, since the manufacturing method is also simply coated (coated) with diglycerin monooleate, the particles are not aggregated and the sizing step can be omitted. Since the particles are smaller than the agglomerated granule and the ethanol concentration is high, the drying process can be processed in a short time.

1. Protein powder raw material in the present invention The protein powder raw material of the present invention is preferably protein powder derived from milk or soybean protein powder. Specifically, protein powders derived from milk include whey protein WPC (Whey Protein Concentrate), WPI (Whey Protein Isolate), milk protein MPC (Milk Protein Concentrate), MPI (Milk Protein Isolate), MCI (Miceller). Casein Isolate) and TMP (Total Milk Protein), and WPC or WPI is particularly preferable.
As the soy protein powder, isolated soy protein or the like is preferable.
The protein content in the protein powder of the present invention is 65% by mass or more as a crude protein, preferably 70 to 95% by mass, more preferably 80 to 95% by mass.
These protein powders may be powders that are sufficiently dried without forming aggregates. The particle diameter of the protein powder is almost the same as that of the protein powder raw material that is the raw material or is increased by the amount of coating, but the increase is within 50 μm. Preferably it is 20 micrometers or less, More preferably, it is 10 micrometers or less. Most protein powder materials have an average particle size of 40 to 120 μm. Therefore, the average particle diameter of protein powder is 40-170 micrometers. Preferably it is 40-140 micrometers, More preferably, it is 40-130 micrometers.
Commercially available protein powder materials can be used. For example, WPC is Lacprodan 80 (Aria Foods Ingredients: protein content 80%), WPI is WPI 895 (Fonterra: protein content 93%), and MPC is Refit MPC80. (FrieslandCampina: protein content 80% (Casein: Whey = 80: 20)), MCI is PRODIET85B (Nippon Shinyaku Co., Ltd .: protein content 80% (Casein: Whey = 92: 8)), isolated soy protein is Fujipro CL (manufactured by Fuji Oil Co., Ltd .: protein content 92%) and the like are not particularly limited.
Further, the technology of the present invention can be widely applied as long as it is a high-purity protein powder having a high protein content. For example, it can be applied to easy solubilization of collagen powder and the like.

2. Coating of protein powder material in the present invention (coating)
(2-1) Coating method of the present invention The protein powder of the present invention is a protein powder coated with a surfactant “diglycerin monooleate”, and diglycerin monooleate is applied to the fluidized protein powder. It is obtained by spraying a high-concentration aqueous ethanol solution and removing ethanol in the subsequent drying step.
As a device for coating, it is preferable to use a fluidized bed granulator, a stirring granulator or the like, but a simple device as described below is also possible.

(2-2) Method Using Fluidized Bed Granulator A typical method for coating the protein raw material powder of the present invention with "diglycerin monooleate" is a method using a fluidized bed granulator. is there.
As long as a fluidized bed can be formed, a small fluidized bed granulator at the laboratory level may be used. As a small fluidized bed granulator, FLOOT FLO-5, POWREC MP-01, etc. can be used.
Specifically, hot air is sent from the lower part of the granulation chamber, the raw protein powder is rolled up in the air to form a “fluidized bed”, and a diglycerin monooleate-containing ethanol solution is sprayed with a spray nozzle to diglycerin monooleate. In this method, coated protein powder is obtained, and dry powder is obtained while ethanol is blown off by hot air drying.
By the way, the fluidized bed granulation apparatus used in the coating method (coating granulation method) of the present invention is used for solubilization of poorly soluble powder and granulation for easy solubilization called “aggregation granulation method”. Since it is the same as the apparatus, the difference between the two methods will be described below.

<Differences from the “aggregating granulation method”>
The fluidized bed granulation method is one of the wet granulation methods. A layer (fluidized bed) in which particles flow by feeding hot air from the lower part of the granulation chamber and winding up the raw material granules into the air. After forming, the granulation liquid is sprayed by a spray nozzle and grown into a granular material by “aggregation” or “coating”. The former is called “aggregated granulation”, and the latter is called “coated granulation”.
“Agglomerated granulation” usually uses a substance having adhesive action such as starch, CMC (carboxymethylcellulose), gelatin and the like as a binder (adhesive), and the granulated liquid in which the binder is dissolved is used as a powder in the fluidized bed. Spray onto granules. The powder particles to which the binder has adhered adhere to each other and aggregate. Furthermore, liquid bridges are formed between the aggregated particles and aggregate into large particles. Aggregated and granulated particles have low hardness and become porous particles, and are also called “granules”. The particle size distribution is wide.
This technique is a general-purpose technique for obtaining “fast-dissolving (easily soluble) granules” in the production of soups, soft drinks, supplements, etc., and is generally a fluidized bed used for easily solubilizing raw material granules. Speaking of the granulation method is this “aggregation granulation method”.
On the other hand, in the case of coating granulation (spray granulation), a solution of a raw material to be coated (coated) on particle nuclei is used as the granulating liquid sprayed on the granular material in the fluidized bed. The granulated liquid is sprayed onto the particle core to form layered particles, which are solidified by hot air drying. In the fluidized bed, the process is continuously repeated and the particles gradually grow larger. Therefore, the particle size can be adjusted by adjusting the residence time in the fluidized bed. The granulated particles are spherical and have a narrow particle size distribution and tend to have high hardness. It is a granulation method that is used as a coating for masking bitter and odorous powders, as well as used in sugar-coated tablets for oral medicine, but is usually used for the purpose of quickly dissolving (easily solubilizing) powders. There is no.

(2-3) Method using an agitation granulator In the case of an agitation granulator, it is often impossible to carry out until the drying step. After coating with the agitation granulator, the ethanol is transferred to an explosion-proof dryer. Remove and dry.
However, such a large-scale drying apparatus is unnecessary, and in the examples of the present invention, the coated powder obtained by the small agitation granulator is transferred onto a flat plate, ethanol is blown off, and then in a constant temperature bath at 60 ° C. Dried.
As a small agitation granulator, VG-05 manufactured by Paulek, SPGJ-25TG manufactured by Dalton, or the like is used.

(2-4) Other simple methods If the manufacturing method of this invention has the apparatus with a stirring blade, for example, a miller (made by Iwatani Corp.), and a manual atomizer, a fluidized-bed granulator or stirring structure will be used. It can be carried out without a large device such as a granulator.

(2-5) Preparation of coating material The essential materials used for coating the protein powder raw material of the present invention are “diglycerin monooleate”, which is a surfactant, ethanol, and water, in a fluidized state. The protein powder material is sprayed with a high-concentration aqueous ethanol solution containing diglycerin monooleate, and then the ethanol is removed.
<Diglycerin monooleate>
Specific examples of “diglycerin monooleate” include Poem DO-100V (diglycerin monooleate: HLB7.3) manufactured by Riken Vitamin Co., Ltd. This is used in the embodiments of the present invention.

    The concentration of diglycerol monooleate is not particularly limited, but the content of diglycerol monooleate is preferably 0.5 to 20 mass%, more preferably 1 to 10 mass% with respect to 100 mass% of the high-concentration ethanol-containing aqueous solution. More preferably, it is 2 to 7.5% by mass, and particularly preferably 3 to 6% by mass.

    The concentration of diglycerin monooleate with respect to the protein powder raw material is preferably 0.05 to 3% by mass. More preferably, it is 0.1-2 mass%, More preferably, it is 0.3-1.5 mass%, Most preferably, it is 0.5-1.2 mass%.

<High-concentration ethanol aqueous solution>
The ethanol concentration in the aqueous solution used as a solvent for diglycerol monooleate in the present invention may be 60% by volume or more, preferably 70% by volume or more, more preferably 75-99.9% by volume, as long as the protein particles are not moistened. is there. The higher the ethanol concentration, the less wet and the shorter the drying time, the more advantageous, but 70 to 75% by volume is preferable from the economical viewpoint.

3. “Diglycerin monooleate-coated protein powder” obtained in the present invention
The “diglycerin monooleate-coated protein powder” obtained in the present invention has a high sediment solubility in water. For example, if it is placed in a cup, water is added and stirred with a spoon or the like, 30 After stirring for 2 to 60 seconds, there is no powder residue on the liquid surface, and there is almost no undissolved residue on the bottom surface.
The “diglycerin monooleate-coated protein powder” is composed of a raw material protein powder that forms the “core layer” and a “coating layer” formed of diglycerin monooleate that covers the entire “core layer”. The “coating layer” has a “dense” structure with no gaps in general coated granulation, but in the present invention, it is formed through a process in which high-concentration ethanol used during production is removed by evaporation. , And is considered to have a “coarse” structure.

EXAMPLES Next, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to these.
Other terms and concepts in the present invention are based on the meanings of terms that are conventionally used in the field, and various techniques used to implement the present invention include those that clearly indicate the source. Except for this, it can be easily and reliably carried out by those skilled in the art based on known documents and the like. In addition, various analyzes were performed by applying the methods described in the analytical instruments or reagents used, kit instruction manuals, catalogs, and the like.
In addition, the description content in the technical literature, the patent gazette, and the patent application specification cited in this specification shall be referred to as the description content of the present invention.

(Example 1) Coating of WPC powder by fluidized bed granulator (ethanol concentration 60%)
2 kg of WPC (whey content: about 80%) is put into a fluidized bed granulator, and the powder is fluidized under conditions of an inlet temperature of 80 ° C. and an exhaust air temperature of 70 ° C. 25 g of diglycerin monooleate is dissolved in 300 g of 99.5% ethanol (general / non-denaturing alcohol (99 degrees) manufactured by Gansu Chemical Industry Co., Ltd.), and 200 g of water (ethanol concentration 60%) is added to prepare a spray solution. All of this liquid was sprayed onto the fluidized bed over 5 minutes, and then dried at an exhaust air temperature of 70 ° C. for 20 minutes to obtain protein powder.
The obtained powder was hardly agglomerated in a smooth state, and no significant change was observed in the particle state.

(Examples 2 and 3) Coating of WPC powder by fluidized bed granulator (ethanol concentration 80%, 100%)
In Example 1, protein powder was obtained by repeating exactly the same operation as in Example 1 except that the ethanol concentration of the solution for dissolving diglycerin monooleate was 80% and 100%. The obtained powder was hardly agglomerated in a smooth state, and no significant change was observed in the particle state.

(Comparative Examples 1 and 2) Coating of WPC powder by fluidized bed granulator (ethanol concentration 40%, 50%)
In Example 1, protein powder was obtained by repeating exactly the same operation as in Example 1 except that the ethanol concentration of the solution for dissolving diglycerin monooleate was 40% and 50%. Although the obtained powder was in a smooth state, it was slightly agglomerated and a slight change was observed in the particle state.

(Test Example 1) Comparative Precipitation Solubility with Examples 1 to 3 and Comparative Examples 1 and 2 The solubility evaluation of protein powders obtained in Examples 1 to 3 and Comparative Examples 1 and 2 was evaluated according to the following evaluation criteria. The results are shown in Table 1.
[Evaluation of sedimentation solubility]
Into a 200 mL beaker containing 150 mL of cold water (5 ° C. ± 1 ° C.), 5 g of protein powder was dropped and stirred manually with a spoon at a stirring speed of about 200 rpm. Was visually confirmed, and the sedimentation solubility of the powder was evaluated according to the following criteria.
(Evaluation criteria)
4: After 10 seconds of stirring, there is no powder residue on the liquid surface, and there is almost no undissolved residue on the bottom surface.
3: After 30 seconds of stirring, there is no powder residue on the liquid surface and almost no undissolved residue on the bottom surface.
2: After 60 seconds of stirring, there is no powder residue on the liquid surface, and there is almost no undissolved residue on the bottom surface.
1: The powder remains on the liquid surface after 60 seconds of stirring, and there is much undissolved residue on the bottom surface.

  The easily soluble high protein-containing powders of Examples 1 to 3 are all non-aggregating and have no powder residue on the liquid surface and almost no undissolved residue on the bottom by stirring with a spoon for about 10 seconds. The evaluation of sedimentation solubility is 4 and good. In the case of Comparative Examples 1 and 2 having an ethanol concentration of 50% or less, there was also agglomeration, and the evaluation of sedimentation solubility was also lowered.

(Example 4) Coating of WPI powder by stirring granulator (ethanol concentration 70%)
200 g of WPI (whey content: about 93%) is put in a stirring granulator, the stirring rotation speed is 60 rpm at the bottom stirring device (blade), and the stirring device (cross screw) in the opposite direction to the bottom stirring device is 2000 rpm to flow the powder. Let
Dissolve 5 g of diglycerin monooleate in 70 g of 99.5% ethanol and add 30 g of water (ethanol concentration 70%) to prepare a spray solution. After spraying 50 g of this solution for 5 minutes, the powder is transferred to a flat plate, transferred into a draft at room temperature (about 25 ° C.), and ethanol is blown away overnight. The protein powder was obtained by putting in a 60 degreeC thermostat for 1 hour, and drying.
The obtained powder was hardly agglomerated in a smooth state, and no significant change was observed in the particle state.

(Example 5) Coating of WPI powder by stirring granulator (ethanol concentration 80%)
In Example 4, protein powder was obtained by repeating exactly the same operation as in Example 4 except that the ethanol concentration when dissolving diglycerin monooleate was 80%.

(Comparative Example 3) Coating of WPI powder by stirring granulator (ethanol concentration 60%)
In Example 4, a protein powder was obtained by repeating exactly the same operation as in Example 4 except that the ethanol concentration of the solution for dissolving diglycerin monooleate was changed to 60%.

(Test Example 2) Comparison of sedimentation solubility of Examples 4 and 5 and Comparative Example 3 (Examples 4 and 5) and sedimentation solubility evaluation of protein powders obtained in (Comparative Example 3) The evaluation criteria are the same as in 1), and the results are shown in (Table 2).

  The easily soluble high protein-containing powders of Examples 4 and 5 did not have any cohesive properties and were almost completely dissolved by stirring with a spoon for about 10 seconds. The evaluation of sedimentation solubility is 4 and good. In the case of Comparative Example 3 having an ethanol concentration of 60% or less, although some cohesion was observed, it was precipitated and dissolved by stirring with a spoon for 60 seconds.

(Examples 6 to 10) In the study of the amount of diglycerin monooleate (Example 4), the diglycerin monooleate was 0.2 g, 0.4 g, 1.2 g, 4 g, and 12 g, and the ethanol concentration was 75%. Except that, protein powder was obtained by repeating exactly the same operation as in Example 4.

(Comparative Examples 4 and 5) In the examination of the amount of diglycerin monooleate (Example 4), 0.04 g and 20 g of diglycerin monooleate and 75% of ethanol concentration (Example 4) and The same operation was repeated to obtain protein powder.

(Test Example 3) Precipitation solubility evaluation of the protein powders obtained in Examples 6 to 10 and Comparative Examples 4 and 5 were compared with those of Examples 6 to 10 and Comparative Examples 4 and 5. The same evaluation criteria as in (Table 1) were used, and the results are shown in (Table 3).

  The easily soluble high protein-containing powders of (Examples 6 and 7) have a little coating state and the sedimentation solubility is evaluated as 3, but none of them shows cohesiveness and is stirred with a spoon for about 30 seconds. Almost completely dissolved. The powders obtained in (Examples 8 and 9) have a good coating state, and the evaluation of sedimentation solubility is 4. When the concentration of diglycerin monooleate is lowered to 0.01% (Comparative Example 4), the coating state is clearly insufficient and aggregation occurs, and the evaluation of sedimentation solubility is lowered to 2.

(Production Example) For the coated WPC protein powder obtained from the strawberry milk flavored product (Example 1), sucralose (Sansuit SU100; manufactured by Saneigen FFI), sodium chloride (baked salt; manufactured by Teshio), Strawberry powder (Asahi FD coffee powder # 24US; manufactured by Asahi Group Foods Co., Ltd.), strawberry flavor (produced by Musashino Fragrance Chemical Laboratories), milk flavor (produced by Musashino Fragrance Chemical Laboratories) and / or citric acid (anhydrous) (fuso (Made by Chemical Industry Co., Ltd.) were mixed at the ratio shown below (Table 4) to produce a “strawberry milk flavored protein powder product”.

Claims (2)

Diglycerin monooleate-coated protein powder having a high sedimentation solubility in water, the “core layer” consisting only of a protein powder raw material having a protein content of more than 70%, and a dicore that covers the entire “core layer” Coated protein powder characterized by comprising a “coating layer” made of glycerin monooleate. A method for producing diglycerin monooleate-coated protein powder having high sedimentation solubility, comprising the following steps (1) and (2);
(1) A step of spraying a spray solution in which diglycerin monooleate is dissolved in an ethanol aqueous solution having an ethanol concentration of 60% by volume or more with respect to a fluidized powder consisting only of a fluidized protein powder raw material,
(2) A step of drying the obtained diglycerin monooleate-coated protein powder to remove ethanol.