阅读说明：本技术 一种用于奶粉基粉的油脂及其制备方法 (Grease for milk powder base powder and preparation method thereof ) 是由 吴桐 谢奎 詹智钧 侯艳梅 于 2020-07-23 设计创作，主要内容包括：本发明公开了一种用于奶粉基粉的油脂及其制备方法,所述用于奶粉基粉的油脂由如下重量份的组分组成：植物油脂1—160,动物天然乳脂40—90。本发明所述用于奶粉基粉的油脂含有天然SN-2棕榈酸和SN-3亚油酸。本发明仅通过调节动物油与植物油的比例,使得油脂的脂肪酸组成比例即接近母乳脂肪酸成分,同时SN-2位棕榈酸相对含量大于20%,SN-3位亚油酸相对含量大于35%,该混合油脂,其生物功效与添加OPO的植物油相比接近并且在提升α-亚麻酸在体内转化为20—22碳Ω-3脂肪酸方面有明显作用。(The invention discloses grease for milk powder base powder and a preparation method thereof, wherein the grease for the milk powder base powder comprises the following components in parts by weight: 1-160 parts of vegetable fat and 40-90 parts of animal natural milk fat. The grease for the milk powder base powder contains natural SN-2 palmitic acid and SN-3 linoleic acid. The invention only adjusts the proportion of animal oil and vegetable oil, so that the fatty acid composition proportion of the oil is close to that of breast milk fatty acid, meanwhile, the relative content of SN-2 site palmitic acid is more than 20%, and the relative content of SN-3 site linoleic acid is more than 35%.)

1. The grease for the milk powder base powder is characterized by comprising the following components in parts by weight: 1-160 parts of vegetable fat and 40-90 parts of animal natural milk fat.

2. The fat for milk powder based powder according to claim 1, wherein the vegetable fat is composed of at least one of coconut oil, palm oil, rice oil, rapeseed oil, and sunflower seed oil.

3. The fat for milk powder-based powder according to claim 1, wherein the vegetable fat comprises the following components in parts by weight: 1-20 parts of coconut oil, 0-40 parts of palm oil, 0-40 parts of rice oil, 0-40 parts of rapeseed oil and 0-20 parts of sunflower seed oil.

4. The fat for milk powder-based powder according to claim 1, wherein the fat for milk powder-based powder is composed of the following components in parts by weight: 1-20 parts of coconut oil, 0-40 parts of palm oil, 0-40 parts of rice oil, 0-40 parts of rapeseed oil, 0-20 parts of sunflower seed oil and 40-90 parts of animal natural milk fat.

5. The fat for milk powder-based powders according to claim 4, wherein the animal natural milk fat is selected from bovine milk fat or ovine milk fat.

6. The fat for milk powder-based powders according to claim 1, wherein the fat for milk powder-based powders has a relative content of SN-2 palmitic acid of not less than 20% and a relative content of SN-3 linoleic acid of not less than 35%.

7. The fat for milk powder-based powders according to claim 6, wherein the fat for milk powder-based powders has a relative content of SN-2 palmitic acid of 20 to 27% and a relative content of SN-3 linoleic acid of not less than 35%.

8. The method for producing fats and oils for milk powder-based powders according to any of claims 1 to 7, comprising the steps of:

(1) centrifuging animal natural milk fat at 20-50 deg.C and 6000-8000 r/m, and controlling the fat content of dilute cream after centrifuging animal natural milk fat to be not less than 38%;

(2) sterilizing the animal natural milk fat treated in the step (1) at 80-90 ℃ for 10-20 min, and then cooling to 4 ℃;

(3) maturing the animal natural milk fat treated in the step (2) for 15-18 h at the temperature of 4-10 ℃;

(4) stirring the animal natural milk fat treated in the step (3) for 20-60 min at the temperature of 10-15 ℃ and the speed of 1500-2000 r/m, washing the animal natural milk fat for 3-5 times by using ice water with the temperature of below 4 ℃ after the fat is separated out, and removing protein to obtain solid milk fat;

(5) melting solid cream at 40-50 deg.C, mixing with vegetable oil at 38-45 deg.C and 40-65 r/m for 15-25min according to the proportion of claim 1 or 2, and making into oil for milk powder base powder.

Technical Field

The invention belongs to the technical field of food, and particularly relates to grease for milk powder base powder and a preparation method thereof.

Background

Most infant formulas use vegetable oil instead of milk fat to provide an overall fatty acid profile similar to breast milk. The research shows that the palmitic acid content of the sn-2 position in the mother milk exceeds 50 percent of the total palmitic acid content (hereinafter referred to as relative content), the sn-2 palmitic acid relative content in the vegetable oil is less than 10 percent, and the sn-2 palmitic acid relative content of the animal milk fat (cow milk or goat milk) is 20 to 40 percent. Therefore, many milk powder manufacturers will add modified structure grease OPO to increase the relative content of sn-2 palmitic acid in fatty acid, and currently marketed OPO additives exist in the form of compounded vegetable oil, wherein the relative content of sn-2 palmitic acid in the compounded vegetable oil is about 40-50%. For example, patent application CN201510541431.3 is to add structural oil to milk powder, but the structural oil is not naturally occurring, and is a food additive prepared by modifying oil.

Researches show that the SN-3 linoleic acid content in the Chinese mother milk accounts for more than 40 percent of the total linoleic acid content, and if the SN-2 palmitic acid content is concerned and OPO is added, the SN-3 linoleic acid content in a fatty acid system of milk powder is insufficient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a nutritional composition for promoting the height development of children.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the grease for the milk powder base powder comprises the following components in parts by weight: 1-160 parts of vegetable fat and 40-90 parts of animal natural milk fat.

Preferably, the vegetable oil and fat is composed of at least one of coconut oil, palm oil, rice oil, rapeseed oil and sunflower seed oil.

Preferably, the vegetable oil and fat comprises the following components in parts by weight: 1-20 parts of coconut oil, 0-40 parts of palm oil, 0-40 parts of rice oil, 0-38 parts of rapeseed oil and 0-20 parts of sunflower seed oil.

Preferably, the grease for the milk powder base powder consists of the following components in parts by weight: 1-20 parts of coconut oil, 0-40 parts of palm oil, 0-40 parts of rice oil, 0-40 parts of rapeseed oil, 0-20 parts of sunflower seed oil and 40-90 parts of animal natural milk fat.

Preferably, the animal natural milk fat is selected from bovine milk fat or ovine milk fat.

Preferably, the relative content of SN-2 palmitic acid in the grease for the milk powder base powder is more than or equal to 20%.

More preferably, the relative content of SN-2 palmitic acid in the oil for the milk powder base powder is 20-27%.

The preparation method of the grease for the milk powder base powder comprises the following steps:

(1) centrifuging animal natural milk fat at 20-50 deg.C and 6000-8000 r/m, and controlling the fat content of dilute cream after centrifuging animal natural milk fat to be not less than 38%;

(2) sterilizing the animal natural milk fat treated in the step (1) at 80-90 ℃ for 10-20 min, preferably 15min, and then cooling to 4 ℃;

(3) maturing the animal natural milk fat treated in the step (2) for 15-18 h at the temperature of 4-10 ℃;

(4) stirring the animal natural milk fat treated in the step (3) for 20-60 min at the temperature of 10-15 ℃ and the speed of 1500-2000 r/m, washing the animal natural milk fat for 3-5 times by using ice water with the temperature of below 4 ℃ after the fat is separated out, and removing protein to obtain solid milk fat;

(5) melting solid cream at 40-50 deg.C, mixing with vegetable oil at 38-45 deg.C and 40-65 r/m according to the ratio of claim 1 or 2, and stirring for 15-25min, preferably 20min to obtain oil used as milk powder base powder.

The grease for the milk powder base powder contains natural SN-2 palmitic acid. The invention only adjusts the proportion of animal oil and vegetable oil to ensure that the fatty acid composition proportion of the oil is close to that of breast milk fatty acid, and the relative content of the palmitic acid at the sn-2 position is more than 20 percent, the biological efficacy of the mixed oil is close to that of the vegetable oil added with OPO, and the mixed oil has obvious effect on improving the conversion of alpha-linolenic acid into 20-22 carbon omega-3 fatty acid in vivo.

Drawings

FIG. 1 shows the weight gain at the end of the experiment in different groups of mice;

FIG. 2 is the apparent absorption rate of calcium from different groups of mice;

FIG. 3 is the apparent absorption rate of magnesium for different groups of mice;

FIG. 4 shows the ratio of palmitic acid to total fatty acids in blood of different groups of mice;

FIG. 5 shows the distribution of intestinal flora in different groups of mice;

FIG. 6 shows the percentage of DHA and omega-3 in the brains of different groups of rats based on the total fatty acids.

Detailed Description

The grease for the milk powder base powder comprises the following components: