WO2014000599A1 - Dry preparation process of infant formula milk powder - Google Patents

Abstract

A microencapsulation preparation process of infant formula milk powder, comprising dried skim milk, whey powder, whey proteins, vegetable oil and fat, lactose, vitamins, mineral substances and other nutrients. A preparation method of the infant formula milk powder comprises the following steps of: using a microencapsulation technique to embed oils in the vitamins, the mineral substances, the vegetable oil and fat and the other nutrients; thoroughly mixing embedded vitamin powder, mineral substance powder, oil nutrients and powder iron composites and other nutrients with a dosage less than 5%; thoroughly mixing the composite obtained through the foregoing steps with the dried skim milk, the whey powder, the whey protein powder, lactose, vegetable fat powder and the like; and eventually nitrogenizing and packaging quantitatively.

Description

 Dry preparation process of infant formula milk powder Technical field

 The invention relates to the technical field of dairy product processing, in particular to a dry preparation process of infant formula milk powder.

Background technique

Infant formula is to meet the nutritional needs of infants and young children, adding various nutrients to the milk powder to achieve the effect close to breast milk. Compared with regular milk powder, infant formula removes some casein in the formula, increases whey protein; removes most of the saturated fatty acids, adds vegetable oil, and increases unsaturated fatty acids. DHA (docosahexaenoic acid, commonly known as brain gold) and AA (arachidonic acid); lactose is also added to the formula, the carbohydrate content is close to human milk; in addition, vitamins, minerals, trace elements, Certain amino acids or other nutrients make it closer to human milk.

At present, there are two preparation processes for infant formula milk powder, one is to reduce pure milk or milk powder to water to reduce the original milk, and then add vitamins, minerals and other nutrients to the milk to reduce the milk evenly, by spray drying method. It is traditionally a wet process; one is made by directly mixing milk powder, fat powder, vitamins, minerals, etc., also known as dry process. The most important problems in the existing processes are: "Millard" reaction, that is, amino compounds such as proteins, amino acids, etc., which interact with sugar to cause browning, which causes the milk powder to become darker; fatty acids are lost, that is, fat in the sunlight. Under the joint action of air and temperature, the fat is hydrolyzed into glycerol and fatty acid, and the fatty acid is oxidized to produce aldehydes and ketones, resulting in an unpleasant scent; mildew caused by incomplete sterilization during milk powder processing; vitamins and Redox reaction between minerals, etc. Minerals are catalysts that produce a lot of reactions, because whether it is a wet process or a dry process, various nutrients are directly mixed and added, and various damage factors cannot be avoided. Because formula, milk, etc. are extremely rich in various kinds of vitamins, minerals and other nutrients, it is easy to produce various quality problems during storage and use, such as cockroaches, mold, browning, and sour smell. Taste and so on.

The taste and appearance of the degraded formula will be deteriorated, the physical properties will be deteriorated, and the vitamins and essential amino acids will be decomposed, resulting in the disappearance of the nutritional value, the decrease of the physiological value and digestibility of the protein, and the growth of toxic substances or metabolic hindrance substances. Therefore, in order to prevent the health of infants and young children, in addition to not letting infants and young children eat degraded milk powder, it is especially important to study the preparation process of more advanced formula milk powder to ensure the quality of the products and the non-destruction of various nutrients.

At present, although some oil substances have been used in the embedding process to change their dispersibility in solid materials or solubility in water-soluble substances, the "Millard reaction" and nutrients of formula milk powder have not been solved. Problems such as redox reaction of vitamins and minerals. Microcapsule technology embeds sensitive components from external factors; it also avoids or mitigates the odor of certain ingredients and their interaction with other ingredients. therefore, The study of microcapsules is of great significance for the preparation of formula.

technical problem

The object of the present invention is to provide a process for preparing an infant formula by a dry process, and the milk powder prepared by the method has the advantages of good stability, sufficient nutritional value and good mouthfeel.

Technical solution

An infant formula that is 100 per weight by weight The ingredients in the g formula include 15-25 g of vegetable oil, 10-25 g of skim milk powder, 27.6-34.21 g of desalted whey powder, 12.24-35.4 g of lactose, 2.75-10.03 g of whey protein powder, 0.1-0.2 g of multivitamin, compound Minerals 0.35-0.7g, other infant formulas allow the addition of nutrients 0.3-0.5g, and appropriate amount of embedding materials, its preparation method is:

(1) First, the vitamins are made into vitamin powder by using microcapsule technology;

(2) Minerals are made from minerals using microcapsule technology;

(3) using vegetable micro-capsule technology to make vegetable fat powder;

(4) The oil in other nutrients is made into oil nutrient powder by microcapsule technology;

(5) mixing the embedded vitamin powder, mineral powder, oil nutrient powder, iron composition and other nutrients in an amount less than 5%;

(6) mixing the mixture prepared in the step (5) with skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder, etc.;

(7) Quantitative packaging for nitrogen filling.

In the above, the vitamin C in the vitamin, the iron source in the mineral and the lactoferrin in the other vegan may be pre-mixed uniformly and then subjected to microencapsulation into an iron composition;

Preferably, the wall material selected by the microcapsules in the above preparation method may be one or more of whey protein, desalted whey powder, lecithin, maltodextrin, corn syrup, and lactose;

Preferably, the wall material selected for the microcapsules may be one or more of whey protein, desalted whey powder, and lactose;

Preferably, in the above preparation method, the step (6) may be: preparing a mixture of skim milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, and step (5), each of which is divided into 5 parts. And sequentially added to the mixer in turn, repeated until the addition is completed, and the stirring is turned on until the mixing is uniform;

As a preferred preparation method, the mixing conditions may be temperature: 20-25 ° C, humidity (RH) ≤ 30-35%, air cleanliness of 100,000, water activity (Aw) of all raw materials ≤ 0.5;

The above micronutrientization of vitamins may be carried out by first adding whey protein powder into purified water to dissolve into a whey protein solution, and adding a multivitamin having a wall material having a mass of 4-6:1 than that of the core material; after uniformly mixing, drying by low temperature spray drying After cooling, the vitamin powder is obtained, or the maltodextrin is first added to the purified water to dissolve into a solution, and then mixed with the multivitamin, the wall material is more than 5-8:1 than the core material, and then cooled by low temperature spray drying. After that, you get vitamin powder;

The microencapsulation of minerals in the above may be carried out by dissolving the added minerals in a small amount of purified water to prepare a suspension, and then dispersing the lecithin having a mineral mass of 1-2 times in the mineral suspension and stirring well. Emulsifying until uniform mixing; pouring the semi-solid product into a container and drying in a freeze dryer; pulverizing the dried sample to a specified mesh number to obtain a mineral powder;

The microencapsulation of the vegetable oil in the above may be carried out by placing the vegetable oil in a phacoemulsification machine, adding lactose and a small amount of lecithin for emulsification, and the wall material has a mass of 1-1.2:1 than the core material, homogenizing, phacoemulsification into a uniform solution, and spraying. Dry and obtain vegetable fat powder, or use desalted whey powder as wall material, fully mix and emulsify oil and wall material of other nutrients, wall-to-core material mass ratio 1-1.2:1, dry and decompress by low temperature, After cooling, pulverize to obtain vegetable fat powder;

The above micronutrientization of the oil nutrient may be carried out by mixing the desalted whey powder with the corn syrup as the wall material, mixing the oil and the wall material of the other nutrients uniformly, and the wall material has a mass of 3-4:1 than the core material. After low-temperature spray drying, cooling, or plant oil in a phacoemulsification machine, adding whey protein powder and lactose with a mass ratio of 3:1, the wall material core material mass ratio is 2-3:1, homogeneous, After phacoemulsification into a uniform solution, spray drying is obtained;

The microencapsulation of the iron composition in the above may be a solution in which the core vitamin C, iron pyrophosphate and lactoferrin are dissolved in a certain amount of purified water to form a solution, and the wall material has a mass ratio of 7:3 of whey protein and malt. The dextrin is dispersed in the solution, and the mass ratio of the wall material to the core material is controlled to be 2-3:1, and the mixture is fully stirred until the mixture is uniform; the semi-solid product is sprayed to a specified mesh number by low-temperature spray drying. Iron composition.

Beneficial effect

The dry preparation process of the infant formula of the invention is a preparation process of mixing and packaging under a certain production condition by partially encapsulating a part of the reaction-prone and unstable substance through microcapsule technology, reducing or preventing Adverse reactions between substances. The prepared infant formula has the advantages of good stability, good uniformity, good mouthfeel and ensuring the nutritional activity of each component.

DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart of the preparation method of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The composition ratio of infant formula is as follows: vegetable oil 25g, embedding wall material: lactose 25g; composite mineral 0.7g, embedding wall material: lecithin 0.35g; multivitamin 0.1g, embedding wall material: whey protein powder 0.4 g; nutrient 0.3 g, embedding wall material: 0.6 g of desalted whey powder, 0.3 g of corn syrup; 10 g of skim milk powder, 27 g of desalted whey powder, 4 g of whey protein powder, and 6.25 g of lactose.

Referring to Figure 1, the preparation process is as follows:

(1) Vitamin microcapsule technology: firstly add whey protein powder into purified water to dissolve into a whey protein solution with a mass fraction of 10%, and add a multivitamin with a wall material of 4:1 mass ratio; after mixing evenly, low temperature Spray drying, operation control inlet temperature 120 ° C, outlet temperature 50 ° C, cooling to get vitamin powder;

(2) Mineral microcapsule technology: Dissolve the added minerals in a small amount of purified water to make a suspension, and then disperse the lecithin with 50% of the mineral mass in the mineral suspension, fully stir and emulsify. Until the mixture is evenly mixed; the semi-solid product is poured into a container, and the refrigerator is frozen at -18 ° C for 12 hours, and then dried in a freeze dryer; the dried sample is pulverized to a specified mesh number to obtain a mineral powder;

(3) Vegetable oil microcapsule technology: the vegetable oil is placed in a phacoemulsification machine, and lactose and a small amount of lecithin are added for emulsification. The wall material has a mass of 1:1 than the core material, the homogenization pressure is controlled to 25 MPa, and the super emulsification is 10 minutes, and the inlet is controlled. The temperature is 150 ° C, the outlet temperature is 70 ° C, spray drying to obtain plant fat powder;

(4) Oil nutrient microcapsule technology: the desalted whey powder is combined with corn syrup as the wall material, and the oil and wall materials in other nutrients are evenly mixed. The wall material has a mass ratio of 3:1, and is spray dried by low temperature. After cooling, it is available;

(5) First, the vitamin powder, mineral powder, oil nutrient powder and other nutrients less than 5% after the microcapsules are added to the mixer, the mixing temperature is controlled at 20 ° C, and the relative humidity (RH) is 35%. The air cleanliness is 100,000 grades, mixed for 10 minutes to make it uniform; then add skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder, etc. for 20min to make uniform; nitrogen-filled quantitative packaging is obtained.

Embodiments of the invention

Ingredients ratio of infant formula is as follows: vegetable oil 25g, embedding wall material: lactose 30g; composite mineral 0.7g, embedding wall material: lecithin 0.7g; multivitamin 0.1g, embedding wall material: whey protein powder 0.6 g; nutrient 0.3 g, embedding wall material: desalted whey powder 0.8 g, corn syrup 0.4 g; skim milk powder 10 g, desalted whey powder 27 g, whey protein powder 4 g, lactose 5.4 g.

 Referring to Figure 1, the preparation process is as follows:

(1) Vitamin microcapsule technology: firstly add whey protein powder to purified water to dissolve into a whey protein solution with a mass fraction of 10%, and add a multivitamin with a wall material of 6:1 mass ratio; Spray drying, operation control inlet temperature 120 ° C, outlet temperature 50 ° C, cooling to get vitamin powder;

(2) Mineral microcapsule technology: Dissolve the added minerals in a small amount of purified water to make a suspension, and then disperse the lecithin of 1 times the mineral mass in the mineral suspension, fully stir and emulsify. Until the mixture is evenly mixed; the semi-solid product is poured into a container, and the refrigerator is frozen at -18 ° C for 12 hours, and then dried in a freeze dryer; the dried sample is pulverized to a specified mesh number to obtain a mineral powder;

(3) Vegetable oil microcapsule technology: the vegetable oil is placed in a phacoemulsification machine, and lactose and a small amount of lecithin are added for emulsification. The wall material has a mass of 1.2:1, the homogenization pressure is 25 MPa, and the super emulsification is 10 min. The temperature is 150 ° C, the outlet temperature is 70 ° C, spray drying to obtain plant fat powder;

(4) Oil nutrient microcapsule technology: the desalted whey powder is combined with corn syrup as the wall material, and the oil and wall materials in other nutrients are evenly mixed. The wall material is 4:1 than the core material, and is spray dried by low temperature. After cooling, it is available;

(5) First, the vitamin powder, mineral powder, oil nutrient powder and other nutrients less than 5% after the microcapsules are added to the mixer, the mixing temperature is controlled at 20 ° C, and the relative humidity (RH) is 35%. The air cleanliness is 100,000 grades, mixed for 10 minutes to make it uniform; then add skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder, etc. for 20min to make uniform; nitrogen-filled quantitative packaging is obtained.

Embodiments of the invention

The composition ratio of infant formula is as follows: vegetable oil 20g, embedding wall material: desalted whey powder 20g; composite mineral 0.35g, embedding wall material: lecithin 0.28g; multivitamin 0.15, embedding wall material: maltodextrin 0.75 g; nutrient 0.5 g, embedding wall material: whey protein powder 0.75 g, lactose 0.25 g; skim milk powder 15 g, desalted whey powder 10 g, whey protein powder 2 g, lactose 29.97 g.

The preparation process is as follows:

(1) Vitamin microcapsule technology: firstly add maltodextrin to purified water to dissolve into a solution with a mass fraction of 20%, and then mix with the multivitamin, the wall material is 5:1, and then the mixture is cooled by low temperature spray drying. After that, you get vitamin powder;

(2) Mineral microcapsule technology: Dissolve the added minerals in a small amount of purified water to make a suspension, and then disperse the lecithin with a mineral quality of 0.8 times in the mineral suspension, fully stir and emulsify. Until the mixture is evenly mixed; the semi-solid product is poured into a container, and the refrigerator is frozen at -18 ° C for 12 hours, and then dried in a freeze dryer; the dried sample is pulverized to a specified mesh number to obtain a mineral powder;

(3) Vegetable oil microcapsule technology: the desalted whey powder is used as the wall material, and the oil and wall materials in other nutrients are fully mixed and emulsified. The wall material and the core material have a mass ratio of 1:1, and are dried and cooled by low temperature under reduced pressure. Crushing to obtain plant fat powder;

(4) Oil nutrient microcapsule technology: the vegetable oil is placed in a phacoemulsification machine, adding whey protein powder and lactose with a mass ratio of 3:1, the wall material core material mass ratio is 2:1, and the control homogenization pressure is 25 MPa. After 10 minutes of super-emulsification, the inlet temperature is controlled at 150 ° C, the outlet temperature is 70 ° C, and spray drying is obtained;

(5) First add the vitamin powder, mineral powder, oil nutrient powder and other nutrients less than 5% after the microcapsules into the mixer. The mixing temperature is controlled at 25 ° C and the relative humidity (RH) is 30%. The air cleanliness is 100,000 grades, mixed for 10 minutes to make it uniform; then add skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder, etc. for 20min to make uniform; nitrogen-filled quantitative packaging is obtained.

Embodiments of the invention

The composition ratio of infant formula is as follows: vegetable oil 20g, embedding wall material: desalted whey powder 24g; composite mineral 0.35g, embedding wall material: lecithin 0.35g; multivitamin 0.15, embedding wall material: maltodextrin 1.2 g; nutrient 0.5 g, embedding wall material: whey protein powder 1 g, lactose 0.5 g; skim milk powder 15 g, desalted whey powder 10 g, whey protein powder 2 g, lactose 24.95 g.

The preparation process is as follows:

(1) Vitamin microcapsule technology: firstly add maltodextrin to purified water to dissolve into a solution with a mass fraction of 20%, and then mix with the multivitamin, the wall material is 8:1, and then the mixture is cooled by low temperature spray drying. After that, you get vitamin powder;

(2) Mineral microcapsule technology: Dissolve the added minerals in a small amount of purified water to make a suspension, and then disperse the lecithin with a mineral quality of 1% by weight in the mineral suspension, fully stir and emulsify. Until the mixture is evenly mixed; the semi-solid product is poured into a container, and the refrigerator is frozen at -18 ° C for 12 hours, and then dried in a freeze dryer; the dried sample is pulverized to a specified mesh number to obtain a mineral powder;

(3) Vegetable oil microcapsule technology: the desalted whey powder is used as the wall material, and the oil and wall materials in other nutrients are fully mixed and emulsified. The wall material and the core material have a mass ratio of 1.2:1, dried by low temperature and dried, and cooled. Crushing to obtain plant fat powder;

(4) Oil nutrient microcapsule technology: the vegetable oil is placed in a phacoemulsification machine, adding whey protein powder and lactose with a mass ratio of 2:1, the wall material core material mass ratio is 3:1, and the control homogenization pressure is 30 MPa. After 10 minutes of super-emulsification, the inlet temperature is controlled at 150 ° C, the outlet temperature is 70 ° C, and spray drying is obtained;

(5) First add the vitamin powder, mineral powder, oil nutrient powder and other nutrients less than 5% after the microcapsules into the mixer. The mixing temperature is controlled at 25 ° C and the relative humidity (RH) is 30%. The air cleanliness is 100,000 grades, mixed for 10 minutes to make it uniform; then add skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder, etc. for 20min to make uniform; nitrogen-filled quantitative packaging is obtained.

Embodiments of the invention

The formula of infant formula is as follows: vegetable oil 15g, embedding wall material: lactose 15g; compound mineral (except iron) 0.6g, embedding wall material: lecithin 0.3g; multivitamin (except vitamin C) 0.11g, embedding wall material: whey protein powder 0.44g; nutrient 0.4g, embedding wall material: desalted whey powder 0.8g Corn syrup 0.4g; vitamin C 0.09g, 0.024g of iron pyrophosphate, 0.06g of lactoferrin, embedding wall material: 0.244g of whey protein powder, 0.104g of maltodextrin; 15g of skim milk powder, 28g of desalted whey powder, 9g of whey protein powder, lactose 14.428g.

The preparation process is as follows:

(1) Iron composition microcapsule technology: dissolve vitamin C, iron pyrophosphate, lactoferrin in a certain amount of purified water to make a solution, and then disperse whey protein and maltodextrin (mass ratio 7:3) In the solution, the mass ratio of the wall material to the core material is 2:1, and the mixture is fully stirred until the mixture is uniform; the semi-solid product is sprayed by low temperature spray, and the dried sample is pulverized to a specified mesh number to obtain an iron composition (water activity) (Aw) ≤ 0.5);

(2) other vitamins, minerals, vegetable oils, oil nutrients prepared according to the method of Example 1 (water activity (Aw) ≤ 0.5);

(3) Add vitamin powder, mineral powder, oil nutrient powder, iron composition and other nutrients less than 5% after microcapsules to the mixer. The mixing temperature is controlled at 20 ° C and the relative humidity (RH) is 30%, the air cleanliness is 100,000, mixed for 10min to make it even;

(4) Prepare a mixture of skim milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, and step (3), each of which is divided into 5 equal portions, and sequentially added to the mixer in portions, repeating until adding Finish, start stirring until evenly mixed;

(5) Quantitative packaging for nitrogen filling.

Embodiments of the invention

The formula of infant formula is as follows: vegetable oil 15g, embedding wall: lactose 18g; compound mineral (except iron) 0.6g, embedding wall material: lecithin 0.6g; multivitamin (except vitamin C) 0.11g, embedding wall material: whey protein powder 0.66g; nutrient 0.4g, embedding wall material: desalted whey powder 0.8g Corn syrup 0.8g; vitamin C 0.09g, iron pyrophosphate 0.024g, lactoferrin 0.06g, embedding wall material: whey protein powder 0.365g, maltodextrin 0.157g; skim milk powder 15g, desalted whey powder 28g, whey protein powder 9g, lactose 10.334g.

The preparation process is as follows:

(1) Iron composition microcapsule technology: dissolve vitamin C, iron pyrophosphate, lactoferrin in a certain amount of purified water to make a solution, and then disperse whey protein and maltodextrin (mass ratio 7:3) In the solution, the mass ratio of the wall material to the core material is 3:1, and the mixture is fully stirred until the mixture is uniform; the semi-solid product is sprayed by low temperature spray, and the dried sample is pulverized to a specified mesh number to obtain an iron composition (water activity) (Aw) ≤ 0.5);

(2) other vitamins, minerals, vegetable oils, oil nutrients prepared according to the method of Example 2 (water activity (Aw) ≤ 0.5);

(3) Add vitamin powder, mineral powder, oil nutrient powder, iron composition and other nutrients less than 5% after microcapsules to the mixer. The mixing temperature is controlled at 20 ° C and the relative humidity (RH) is 30%, the air cleanliness is 100,000, mixed for 10min to make it even;

(4) Prepare a mixture of skim milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, and step (3), each of which is divided into 5 equal portions, and sequentially added to the mixer in portions, repeating until adding Finish, start stirring until evenly mixed;

(5) Quantitative packaging for nitrogen filling.

Embodiments of the invention

The composition ratio of the larger infant formula is as follows: vegetable oil 20g, embedding wall material: desalted whey powder 20g; composite mineral (except iron) 0.5g, embedding wall material: lecithin 0.4g; multivitamin (except vitamin C ) 0.12g, embedding wall material: maltodextrin 0.6g; nutrient 0.5g, embedding wall material: whey protein powder 0.75g, lactose 0.25g; ferrous sulfate (iron content 20%) 0.03g, lactoferrin 0.048g, vitamin C 0.06 g, embedding wall material: 0.138 g of desalted whey powder, 0.138 g of maltodextrin; 25 g of skim milk powder, 10 g of desalted whey powder, 2 g of whey protein powder, 16.966 g of lactose, and 2.5 g of oligosaccharide.

The preparation process is as follows:

(1) Iron composition microcapsule technology: Dissolve vitamin C, ferrous sulfate, lactoferrin in a certain amount of purified water to make a solution, and then disperse the desalted whey powder and maltodextrin (mass ratio 1:1) In solution (wall material to core material mass ratio of 2:1), stir well until homogeneous; the semi-solid product is sprayed by low temperature spray, and the dried sample is pulverized to the specified mesh number to obtain iron composition (water Activity (Aw) ≤ 0.5);

(2) other vitamins, minerals, vegetable oils, oil nutrients prepared according to the method of Example 3 (water activity (Aw) ≤ 0.5);

(3) Add vitamin powder, mineral powder, oil nutrient powder, iron composition and other nutrients less than 5% after microcapsules to the mixer. The mixing temperature is controlled at 25 ° C, and the relative humidity (RH) is 35%, the air cleanliness is 100,000, mixed for 10min, so that it is even;

(4) Prepare a mixture of skim milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, and step (3), each of which is divided into 5 portions, and sequentially added to the mixer in turn, and repeated until the addition Finish, start stirring until evenly mixed;

(5) Quantitative packaging for nitrogen filling.

Embodiments of the invention

The composition ratio of the larger infant formula is as follows: vegetable oil 20g, embedding wall material: desalted whey powder 24g; composite mineral (except iron) 0.5g, embedding wall material: lecithin 0.5g; multivitamin (except vitamin C ) 0.12g, embedding wall material: maltodextrin 0.96g; nutrient 0.5g, embedding wall material: whey protein powder 1.125g, lactose 0.375g; ferrous sulfate (iron content 20%) 0.03g, lactoferrin 0.048g, vitamin C 0.06 g, embedding wall material: 0.207 g of desalted whey powder, 0.207 g of maltodextrin; 25 g of skim milk powder, 10 g of desalted whey powder, 2 g of whey protein powder, 11.868 g of lactose, and 2.5 g of oligosaccharide.

The preparation process is as follows:

(1) Iron composition microcapsule technology: Dissolve vitamin C, ferrous sulfate, lactoferrin in a certain amount of purified water to make a solution, and then disperse the desalted whey powder and maltodextrin (mass ratio 1:1) In the solution (the wall material to core material mass ratio is 3:1), stir well until the mixture is uniform; the semi-solid product is sprayed by low temperature spray, and the dried sample is pulverized to the specified mesh number to obtain the iron composition (water Activity (Aw) ≤ 0.5);

(2) other vitamins, minerals, vegetable oils, oil nutrients prepared according to the method of Example 4 (water activity (Aw) ≤ 0.5);

(3) Add vitamin powder, mineral powder, oil nutrient powder, iron composition and other nutrients less than 5% after microcapsules to the mixer. The mixing temperature is controlled at 25 ° C, and the relative humidity (RH) is 35%, the air cleanliness is 100,000, mixed for 10min, so that it is even;

(4) Prepare a mixture of skim milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, and step (3), each of which is divided into 5 portions, and sequentially added to the mixer in turn, and repeated until the addition Finish, start stirring until evenly mixed;

(5) Quantitative packaging for nitrogen filling.

Industrial applicability

The preparation method provided by the invention has the following advantages:

1. Microcapsule technology is used to embed unstable or reactive materials to ensure the activity of each nutrient;

2, the special mixing process ensures the uniform dispersion of each nutrient, the temperature and humidity requirements of the production process are extremely strict, and the quality of the product is guaranteed;

3, nitrogen storage, to ensure the stability of the product.

[0029] The following is a study on the stability of the preparation of milk powder of the present invention:

Sample: The milk powder prepared according to the formulation and process of Example 1 was used as a sample group; according to the formulation of Example 1, the milk powder prepared by the ordinary dry process was used as a control group.

[0030] Test method: Two samples packed with nitrogen were placed in a constant temperature and humidity chamber, the temperature was controlled at 40 ° C, and the humidity was 75%. The surface oil, peroxide value and sensory index were measured monthly for 6 months.

[0031] Sensory index: using a 10-point evaluation method, and drinking according to the same standard.

[0032] The results are as follows:

Table 1 Surface oil and peroxide value of milk powder

Time (month)	Control group	Control group	Sample set	Sample set
	Surface oil (%)	Peroxide value (meq.kg-1)	Surface oil (%)	Peroxide value (meq.kg-1)
0	0.353	5	0.183	2
1	0.355	5.5	0.184	2
2	0.359	6.2	0.185	3
3	0.361	7.0	0.186	3
4	0.369	7.8	0.188	4
5	0.381	8.8	0.190	5
6	0.392	10	0.193	6

From the results of the above table, it can be seen that the surface oil and peroxide value of the milk powder in the sample group did not increase significantly during the whole inspection period, and the control group began to increase after 3 months; the sensory index evaluation test, the sample group During the whole period of investigation, the appearance and odor did not change much, with an average of 9.1 points; the control group began to smell astringent from the 4th month, and the taste increased with the increase of the month, and the appearance also showed a slight yellowing. Divided into 7.5 points; indicating that the milk powder prepared by the preparation method of the patent is more stable than the ordinary process.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements without departing from the core technical features of the present invention. Retouching should also be regarded as the scope of protection of the present invention.

Sequence table free content

Claims (10)

1.  A dry preparation process for infant formula containing 15-25 g of vegetable oil and 10-25 g of skim milk powder per 100 g of formula , desalted whey powder 27.6-34.21g, lactose 12.24-35.4g, whey protein powder 2.75-10.03g, multivitamin 0.1-0.2g, complex minerals 0.35-0.7g, other infant formulas allow the addition of nutrients 0.3-0.5g, and an appropriate amount of embedded wall material, which is characterized by the following processes and steps:

   (1) First, the vitamins are made into vitamin powder by using microcapsule technology;

   (2) Minerals are made from minerals using microcapsule technology;

   (3) using vegetable micro-capsule technology to make vegetable fat powder;

   (4) using oils from other nutrients to make oil nutrient powder by microcapsule technology;

   (5) mixing the embedded vitamin powder, mineral powder, oil nutrient powder and other nutrients in an amount less than 5%;

   (6) will step (5) The prepared mixture is uniformly mixed with skim milk powder, whey powder, whey protein powder, lactose, vegetable fat powder and the like;

   (7) Nitrogen quantitative packaging.
2. The dry preparation process of the infant formula according to claim 1, characterized in that vitamin C in vitamins, iron source in minerals and lactoferrin in other nutrients are premixed uniformly before proceeding The microcapsules are embedded in an iron composition.
3. The dry preparation process of the infant formula according to claim 1 or 2, wherein the wall material used for the microcapsules is whey protein, desalted whey powder, lecithin, maltodextrin, corn syrup, One or several of lactose.
4. The dry preparation process of the infant formula according to claim 3, characterized in that the operation of the step (6) is: skimmed milk powder, whey powder, whey protein powder, vegetable fat powder, lactose, The mixture was prepared in the step (5), and divided into 5 equal portions, and sequentially added to the mixer in portions, and repeated until the addition was completed, and the stirring was started until the mixing was uniform.
5. The microencapsulation preparation process of the infant formula according to claim 4, characterized in that the mixing condition is temperature: 20-25 ° C, humidity (RH) ≤ 30-35%, air cleanliness is 100,000 level, The water activity (Aw) of all raw materials is ≤0.5.
6. The dry preparation process of the infant formula according to claim 5, wherein the vitamin microencapsulation is firstly added to the purified water to dissolve the whey protein powder into a whey protein solution, and the quality of the wall material is added to the core material. 4-6:1 multivitamin; after mixing evenly, after cooling by low temperature spray drying, you can get vitamin powder, or first add maltodextrin to purified water to dissolve into solution, and then with multivitamin, wall material than core material quality After mixing uniformly from 5-8:1, it is spray dried by low temperature and cooled to obtain vitamin powder.
7. The dry preparation process of the infant formula according to claim 6, wherein the mineral microcapsule is obtained by dissolving the added mineral in a small amount of purified water to prepare a suspension, and then massing the mineral. 0.5-1 times of lecithin is dispersed in the mineral suspension, fully stirred and emulsified until homogeneously mixed; the semi-solid product is poured into a container and dried in a freeze dryer; the dried sample is pulverized to the prescribed The mesh is the mineral powder.
8. The dry preparation process of the infant formula according to claim 7, characterized in that the microencapsulation of the vegetable oil is carried out by placing the vegetable oil in a phacoemulsification machine, adding lactose and a small amount of lecithin for emulsification, and the wall material is more than the core material. The quality is 1-1.2:1, homogenized, phacoemulsified into a uniform solution, spray-dried to obtain vegetable fat powder, or desalted whey powder as wall material, and the oil and wall materials in other nutrients are fully mixed and emulsified, wall The ratio of the material to the core material is 1-1.2:1, and the plant fat powder is obtained by drying under low temperature and cooling, and then pulverizing after cooling.
9. The dry preparation process of the infant formula according to claim 7, characterized in that the oil nutrient microencapsulation is based on the desalted whey powder combined with the corn syrup as the wall material, and the oil and the wall in the other nutrients. The material is evenly mixed, the wall material is 3-4:1 than the core material, and is obtained by low-temperature spray drying, cooling, or the vegetable oil is placed in a phacoemulsification machine, and the whey protein powder having a mass ratio of 3:1 is added. Lactose, wall material core material mass ratio of 2-3:1, homogenized, phacoemulsified into a uniform solution, spray drying is obtained.
10. The dry preparation process of the infant formula according to claim 8, characterized in that the microencapsulation of the iron composition is prepared by dissolving the core vitamin C, iron pyrophosphate and lactoferrin in a certain amount of purified water. Into a solution, then the wall material ratio of 7:3 whey protein and maltodextrin dispersed in the solution, control the wall material and core material mass ratio is controlled at 2-3:1, fully stirred until the mixture is even; The solid product is pulverized to a specified mesh number by a low temperature spray drying to obtain an iron composition.

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