JP7102864B2 - Membrane material for forming coating powder and coating powder - Google Patents

Description

The present invention relates to a film material used for coating the surface of a powder and a coating powder obtained by using the film material.

The oil-and-fat coating technique is a technique for physically colliding and spreading a solid oil-and-fat composition on a powder surface to coat it. By coating the core powder with a solid oil / fat composition and blocking it from the outside world, it is possible to avoid contact between the powders and suppress the chemical reaction of each powder substance. For example, Patent Document 1 discloses a method of mixing a lipid powder and a core substance to produce a lipid coating in which the core substance is coated with lipid, and the core substance is sufficiently coated in the lipid coating. It is disclosed that it is stable for a long period of time without agglomeration during storage.

Recently, new functions have been required for coating powders. In applications such as powdered beverages and bath salts, it may be dispersed or dissolved in water before use, and in that case, dispersibility in water is required. For example, Patent Document 2 discloses a method of improving the affinity for water by using a powdered oil or fat whose particle surface is previously coated with a hydrophilic material as a film material and coating a core material made of a hygroscopic powder. Has been done.

JP-A-2007-261985 Japanese Unexamined Patent Publication No. 2001-017093

Since the above-mentioned disclosed technique has good water dispersibility, it is possible to prevent "oil floating" due to the film material after the core material made of hygroscopic powder is dissolved. However, the barrier property with the outside world, which is an advantage of the oil and fat coating technique, has not been sufficiently studied. Therefore, in the field of oil and fat coating technology, there is a demand for a coating powder forming film material capable of achieving both barrier property with the outside world and water dispersibility.

Therefore, an object of the present invention is to provide a film material for forming a coating powder capable of achieving both a barrier property with the outside world and a water dispersibility.

As a result of diligent studies in view of the above problems, the present inventors have solved the above problems by using fats and oils having a specific melting point and a specific solid fat content in a specific amount in combination with an emulsifier and a water-soluble excipient. The present invention has been completed with the knowledge that it can be solved.
That is, the present invention is the following [1] and [2].

[1] A fat (A) containing a solid fat content of 20 to 100% at 35 ° C. and a melting point of 40 to 70 ° C., an emulsifier (B), and a water-soluble excipient (C). The content of the emulsifier (B) is 2.5 to 13% by mass, and the content of the water-soluble excipient (C) is 22.5 to 45% by mass. A film material for forming a particulate coating powder having a heat absorption peak of 40 to 70 ° C. and an average particle size of 10 to 150 μm for scanning calorific value measurement.
[2] A coating powder having a coating layer made of the coating powder forming film material of the above [1] on the surface of the powder.

According to the present invention, it is possible to provide a film material for forming a coating powder capable of achieving both a barrier property with the outside world and a water dispersibility.

It is an image in which the coating powder prepared by using the film material for forming the coating powder is dispersed in water.

[Membrane material for coating powder formation]
The film material for forming a coating powder of the present invention contains an oil (A), an emulsifier (B), and a water-soluble excipient (C). Each component will be described in detail below.

<Fat (A)>
The fat (A) used in the present invention has a solid fat content of 20 to 100% at 35 ° C. and a melting point of 40 to 70 ° C.
The fat and oil that can be used as the component A in the present invention has a solid fat content of 20 to 100% at 35 ° C., and the lower limit is preferably 50% or more, more preferably 70% or more. If the solid fat content at 35 ° C. is too low, it becomes difficult to obtain a good coating by the coating treatment by mixing, and good processability cannot be obtained.
The solid fat content of fats and oils can be measured by using the PRAXIS MODEL SFC-900A as an NMR device according to the standard fats and oils analysis test method (2.2.9-2003) established by the Japan Oil Chemists' Society.

The melting point of the fat (A) is 40 to 70 ° C., and the lower limit is preferably 45 ° C. or higher, more preferably 50 ° C. or higher. The upper limit is preferably 65 ° C. or lower, more preferably 60 ° C. or lower. If the melting point is too low, the processability is lowered when used as the coating powder forming film material, and if it is too high, it becomes difficult to manufacture the coating powder forming film material.
The melting point of the fat (A) can be measured according to the standard fat analysis test method "2.2.4.2 melting point (rising melting point)".

The film material for forming a coating powder of the present invention is not particularly limited as long as it has the above-mentioned properties, and for example, edible oils and fats containing vegetable oils and animal oils, mineral oils and the like can be used. Further, the separated edible oils and fats, hydrogenated cured products and the like can also be used. The above-mentioned components can be appropriately selected by themselves or in combination of two or more.

As edible oils and fats, specifically, palm oil, rapeseed oil, soybean oil, cottonseed oil, corn oil, palm oil, palm kernel oil, rice oil, sesame oil, olive oil, cacao oil, saflower oil, sunflower oil, evening primrose oil, and borage. Natural vegetable oils such as oil, jojoba oil, perilla oil, egoma oil, peanut oil, rice oil; beef oil, pork oil, fish oil, milk fat, chicken oil, whale oil, tuna oil, sardine oil, mackerel oil, sardine oil, bonito Natural animal fats and oils such as oils, herring oils, liver oils and butters; or hardened oils alone or in combination thereof, extremely hardened oils, fractionated oils, ester exchange oils, and synthetic triglycerides such as medium chain fatty acid triglycerides. Examples include blended oils and fats. For example, a fat or oil having a low solid fat content or a melting point can be mixed with the above-mentioned fat and oil component to prepare a solid fat content of 20 to 100% and a melting point of 40 to 70 ° C. and used.

The content of the fat (A) in the film material for forming a coating powder of the present invention is 40 to 75% by mass, and the lower limit is 45% by mass or more, more preferably 50% by mass or more. The upper limit value is preferably 70% by mass or less, and more preferably 60% by mass or less. If the content of the fat (A) is too low, the coating performance is lowered, and if it is too high, the processability is lowered.

<Emulsifier (B)>
The emulsifier (B) used in the present invention is not particularly limited as long as it can emulsify the fat (A), and is, for example, a glycerin fatty acid such as sodium octenyl succinate, sodium glycerin fatty acid, sodium caseinate, monoglyceride, and monoglyceride organic acid. Examples thereof include esters, polyglycerin fatty acid esters, polyglycerin condensed ricinoleic acid esters, sucrose fatty acid esters, sorbitan fatty acid esters, propylene glycol fatty acid esters, lecithin, saponin, etc., preferably sodium octenyl succinate, sodium glycerin fatty acid, sodium caseinate. , Glycerin fatty acid ester.
These emulsifiers may be used alone or in combination of two or more.

The content of the emulsifier (B) in the film material for forming a coating powder of the present invention is 2.5 to 13% by mass, and the lower limit is 4% by mass or more, more preferably 5% by mass or more. .. The upper limit value is preferably 10% by mass or less, and more preferably 8% by mass or less. If the content of the emulsifier (B) is too low, dispersibility in water cannot be obtained, and if it is too high, it tends to condense after being made into a film material for forming a coating powder.

<Water-soluble excipient (C)>
The water-soluble excipient (C) used in the present invention is used to improve the moldability of the coating powder forming film material and the dispersibility in water. The water-soluble excipient (C) is not particularly limited, and examples thereof include sugars such as lactose and processed starch, defatted milk powder and trehalose, maltose and dextrin, and polyalkylene glycols such as polyethylene glycol and polypropylene glycol. Dextrin, lactose, and defatted milk powder are preferable. Since the water-soluble excipient (C) used in the present invention is water-soluble, it has good dispersibility in water and a good quality coating can be obtained.
The content of the water-soluble excipient (C) in the film material for forming a coating powder of the present invention is 22.5 to 45% by mass, and the lower limit is preferably 30% by mass or more, more preferably 35. It is mass% or more. The upper limit value is preferably 44% by mass or less, and more preferably 40% by mass or less. If the content of the water-soluble excipient (C) is too low, the processability is lowered, and if it is too high, the coating performance is lowered.

<Other ingredients>
The film material for forming a coating powder of the present invention may contain other components in addition to the above components (A) to (C).
Other components may be components that do not impair properties such as water dispersibility in the coating powder forming film material, and examples thereof include proteins, carbohydrates, antioxidants, stabilizers, and inorganic salts.

The film material for forming a coating powder of the present invention has an endothermic peak temperature of 40 to 70 ° C. for differential scanning calorimetry, and the lower limit is preferably 45 ° C. or higher, more preferably 50 ° C. or higher. The upper limit is preferably 60 ° C. or lower, more preferably 55 ° C. or lower. If the endothermic peak temperature of the differential scanning calorimetry is less than 40 ° C., the processing suitability is lowered.
The endothermic peak temperature of the differential scanning calorimetry in the coating powder forming film material of the present invention is the temperature at which the crystallization component of the coating powder forming film material melts. The endothermic peak temperature can be measured using a differential scanning calorimetry device, Thermo plus DSC8230, and is the temperature at the apex of the absorption peak.

The film material for forming a coating powder of the present invention is in the form of particles. The average particle size of the particles is 10 to 150 μm, and the lower limit is preferably 50 μm or more, more preferably 60 μm or more. The lower limit is 100 μm or less, more preferably 80 μm or less.
By setting the average particle size of the coating powder forming film material within the above range, it is possible to evenly coat the core material and improve the barrier property with the outside world.
The average particle size can be measured using a laser diffraction type particle size distribution measuring device.

<Preparation method of film material for coating powder formation>
The film material for forming a coating powder of the present invention can be prepared in the form of particles in the above particle size range by a conventional method. Generally, it can be produced through an emulsification step and a drying step.
<Emulsification process>
The emulsification step is a step of emulsifying an aqueous solution in which an oil (A), an emulsifier (B) and a water-soluble excipient (C) are mixed. For example, the emulsifier (B) and the water-soluble excipient (C) are added to the warm water prepared in the tank with stirring to dissolve them, and then the fat (A) is added while continuing stirring to make the oil and fat (A) coarsely emulsified. , This crude emulsion is emulsified with a homogenizer.
For emulsification in a homogenizer, it is preferable to use a line mixer or a menton golin type homogenizer. In the case of a menton-gorin type homogenizer, the treatment conditions are preferably 10 MPa or more, more preferably 20 MPa, and most preferably 30 MPa or more. It is preferable that the oil droplets are refined to 1.0 μm or less by this emulsification in order to suppress oxidation in the subsequent steps and storage.

<Drying process>
The drying step is a step of evaporating the water content of the emulsified liquid emulsified by the emulsification step with a dryer. For example, the emulsified liquid emulsified in the emulsification step is dried by evaporating the water content in a dryer such as a spray dryer. Examples of the dryer include a freeze dryer, a drum dryer, a spray dryer, and a vacuum belt dryer. In order to suppress the oxidation of highly unsaturated fatty acids, the spray dryer preferably has a hot air temperature of 100 to 120 ° C. and an exhaust air temperature of 70 to 90 ° C. Further, after drying, pulverization, sieving, and filling are performed as appropriate, but fine silicon dioxide may be added in order to improve powder fluidity by also mixing at the time of pulverization. Then, pulverization, sieving, and filling are performed as appropriate.

[Coating powder]
The coating powder of the present invention has a coating layer made of the above-mentioned film material for forming a coating powder on the surface of the powder.
The coating powder of the present invention can be formed by a conventional method using the film material for forming a coating powder of the present invention. Specifically, it can be carried out by mixing each of the coating powder forming film material and the powdery core material.
The temperature at the time of mixing is a temperature of 20 to 45 ° C. If the temperature is lower than 20 ° C., the coating powder forming film material cannot be efficiently adhered to the core material, and a good coating cannot be obtained. If the temperature exceeds 45 ° C., oil is likely to seep out from the coating powder forming film material, and a good coating cannot be obtained, which is not preferable.

At the time of mixing, the coating powder forming film material and the powder of the core material material come into contact with each other and collide with each other. Specifically, the powder is mixed by a known mixer, a high-efficiency powder mixing device, and high-speed convection. Use a device that makes contact. These devices contact and collide the powders with each other, and also contact and collide with the inner wall of the device and the auxiliary tool to adhere and coat the coating powder forming film material with the core material.

The core material is not particularly limited, but is not limited to inorganic salts such as salt, baking soda and magnesium chloride; organic acids such as citric acid, tartaric acid and fumaric acid; monosaccharides such as glucose, fructose and galactose, maltose, lactose and sucrose. , Trehalose and other disaccharides, and other sugar powders such as erythritol, sorbitol, mannitol, martitol, lactitol, palatinit, xylitol; , Natural extract powder such as malt extract; Vegetable powder such as tomato, eggplant, carrot; Spice powder such as wasabi, mustard, ginger, chili; Enzyme powder such as amylase, protease, lipase; Yeast, bifidus, lactic acid, etc. Useful live bacteria powder; water-soluble vitamins such as vitamin B group, vitamin C, folic acid, nicotinic acid amide, vitamin powder such as fat-soluble vitamins such as vitamins A, D, E, K; spirulina, chlorella, Koryo carrot, Reishi , Agarisk, Maitake, Ginkgo biloba, Ukon, Blueberry, Various herbs, Obako, Aloe, Tea, Pollen, Garcinia, Gymnema and other plants, Algae, Mycelium powder; Chitin, Chitosan, Collagen and other powders; Other royal jelly , Propolis, nucleic acid, lecithin, saponin, sterols, carnitine, ceramide, catechin, shark cartilage, powder such as hem iron, powder fragrance, peptide powder, consomme powder, pigment powder, hem iron powder and the like. These may be used alone or in combination of two or more. The average particle size of these core materials is not particularly limited, but the average particle size of these core materials is not particularly limited, but is usually in the range of 10 μm to 3 mm, preferably 100 μm to 1 mm.

[Use of film material for coating powder formation]
The film material for forming a coating powder of the present invention is, for example, bread and confectionery such as bread, biscuits and jelly; processed milk meat foods such as yogurt and ham; seasonings such as miso, sauce and dressing; processed foods such as tofu and noodles; Examples include foods and drinks such as capsule-shaped, tablet-shaped, and granular health foods, bathing agents, and cosmetics.

Hereinafter, the present invention will be specifically described with reference to examples. The blending amount in the examples is based on mass.

<Adjustment of film material for coating powder formation>
A film material for forming a coating powder was produced by the following method with the compounding composition shown in Table 1.
<Adjustment of water phase>
The emulsifier (B) and the water-soluble excipient (C) were dissolved in warm water (80 ° C.).
<Manufacturing of film material for coating powder formation>
The oil and fat (A) was added while stirring the aqueous phase to prepare a crude emulsion. This crude emulsion is emulsified with a manton gorin type homogenizer (30 MPa), dried using a spray dryer (hot air temperature 150 ° C., exhaust air temperature 85 ° C.), and the obtained dried product is crushed to form a coating powder. A film material was obtained.

<Formation of coating powder>
A coating powder was produced by treating with a vertical granulator (manufactured by Paulec Co., Ltd.) for 20 minutes using 10 parts by mass of a coating powder forming film material and 90 parts by mass of baking soda produced with the formulations shown in Table 1.

Next, the evaluation method in each example is shown.
(1) Solid fat content (SFC)
The solid fat content of the fat (A) used for producing the above-mentioned film material for forming a coating powder was measured. The measurement was performed using an NMR apparatus (PRAXIS MODEL SFC-900A).
(2) Endothermic peak of differential scanning calorimetry The heat absorption peak temperature of differential scanning calorimetry was measured by raising the temperature of the coating powder forming film material obtained in the above production example under the condition of 10 ° C./min. The measurement was performed using a differential scanning calorimetry device (Thermo plus DSC8230).

(3) Average Particle Diameter The particle size of the coating powder forming film material obtained above was measured using a laser diffraction type particle size distribution measuring device (SALD-2100) manufactured by Shimadzu Corporation, and the median diameter was calculated.

(4) Processing suitability A high-speed stirring mixer (vertical granulator (manufactured by Paulek Co., Ltd.)) was used to mix with baking soda. After the treatment, it was visually confirmed whether or not oil and fat exudation was observed in the tank of the machine, and evaluated as follows. ○ It was judged that the above is the pass range that can be put to practical use.
◎: No oil exudation ○: The whole powder is moist and lumps are observed, but no oil droplets are observed in the tank ×: Oil exudation is severe and oil droplets are observed in the tank

(5) Coating / blocking property Baking soda obtained by forming the above coating powder and citric acid are filled in an aluminum stick so that the mass ratio is 1: 1 and then sealed with a heat seal, and the temperature is 40 ° C. A storage test was conducted for 90 days in an environment with a humidity of 75% by mass. By the water burial method, the volume change before and after storage was measured, and the coating / blocking property was evaluated. If the coating / blocking property is poor, the baking soda reacts with citric acid in the aluminum stick to generate carbon dioxide, so that the volume change of the aluminum stick becomes large.
(6) Dispersibility in water The degree of floating on the water surface and the degree of dispersion in water when the above-mentioned coating powder was added to water were visually confirmed as shown in FIG. 1 and evaluated as follows. did. ○ was judged to be the pass range that can be put to practical use.
◯: Completely dispersed in water ×: Not dispersed in water at all

From the results shown in Table 1, it can be seen that the coating powders of Examples 1 to 4 using the coating powder forming film material of the present invention are excellent in processability, coating / blocking property, and dispersibility in water. Recognize. It was found that Examples 1, 3 to 4 using the fat (A) having a large solid fat content (SFC) of the fat (A) exerted a more excellent effect in coating / blocking property.

In Comparative Examples 1 and 2, the solid fat content of the fat (A) is less than 20%, the content of the water-soluble excipient (C) is less than 22.5% by mass, and the endothermic peak of the film material is Since the temperature was lower than 40 ° C., it was found that the processing suitability and the coating / blocking property were inferior. In Comparative Example 3, since the solid fat content of the fat (A) was less than 20% and the endothermic peak of the film material was less than 40 ° C., it was found that the coating / blocking property was inferior. Comparative Example 4 used a film material for forming a coating powder containing no water-soluble excipient (B) and emulsifier (C), and it was found that the dispersibility of the coating powder in water was inferior.

Claims (2)

A fat (A), which has a solid fat content of 20 to 100% at 35 ° C. and a melting point of 40 to 57 ° C., and is a palm oil or a hardened oil of palm oil, an extremely hardened oil, a fractionated oil or an ester exchange oil . Contains the emulsifier (B) and the water-soluble excipient (C), the oil (A) content is 40 to 75% by mass, the emulsifier (B) content is 2.5 to 13% by mass, and water-soluble. A particulate coating powder having a sex excipient (C) content of 22.5 to 45% by mass, a heat absorption peak temperature of 40 to 70 ° C. for differential scanning calorific value measurement, and an average particle size of 60 to 150 μm. Forming film material. A coating powder having a coating layer made of a film material for forming a coating powder according to claim 1 on the surface of the powder.

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