A natural ink for collagen casings and its preparation method

Abstract

The present application discloses a natural ink for collagen casings and a preparation method thereof, belonging to the technical field of food printing materials. The preparation method of the ink includes: mixing chitosan with water, then adding natural organic acid and stirring to obtain a mixed solution A; dissolving cocoa powder and lecithin in water at 80-100 °C and stirring evenly to obtain a mixed solution B; adding water to the collagen mass for producing collagen casings, with the weight ratio of the collagen mass to water being 1:(5-7), grinding to obtain a mixed solution C; adding the mixed solution B, the mixed solution C and TG enzyme to the mixed solution A and stirring to obtain the natural ink for collagen casings. It not only makes the shaped casing not fade when encountering water and has more stable color after steaming, frying and baking, but also all the raw materials used are of natural origin, safe and healthy, and are more easily accepted by the public.

Description

Technical Field

[0001] The present application relates to a natural ink for collagen casings and a preparation method thereof, belonging to the technical field of food printing materials. Background Art

[0002] Sausage is a very convenient food in modern people's lives. It enriches people's dietary needs with its unique flavor and convenience in carrying, and is a popular fast food around the world. The casing is specifically used for packaging sausages. Its main purpose is to prevent the sausage from being damaged during the manufacturing process, form a unified shape of the sausage, and extend the storage time of the sausage. Printing words or patterns on the surface of the sausage can increase the appearance beauty, enhance brand recognition, convey strong information and personalized creativity, and achieve a good publicity effect.

[0003] Collagen casings are made from materials such as animal skins or tendons and are edible. By consuming them, the collagen in the human body can be supplemented, making the skin firmer. However, there may be grease on the surface of the collagen casing, which is not conducive to printing. After high-temperature steaming, frying or baking, the printing ink will have the problem of decolorization. Chinese invention patent CN202311411408.3 discloses an edible printing ink for collagen casings and a preparation method thereof. By the combined action of chitosan, mono- and diglycerol fatty acid esters, and span, the effect of printing on the casing can be achieved, and the casing will not have the problems of ink dropping and fading during high-temperature steaming, and is resistant to high-temperature boiling, frying and baking. However, for edible pigment products, most consumers have a resistant mentality, and this ink also involves a large number of synthetic additives, so it is difficult to be accepted by the public, thus limiting its wide application. Summary of the Invention

[0004] In order to solve the above problems, a natural ink for collagen casings and a preparation method thereof are provided. Not only does the shaped casing not fade when exposed to water, but also the color is more stable after steaming, frying and baking. Moreover, all the raw materials used are of natural origin, safe and healthy, and are more easily accepted by the public.

[0005] The technical solution adopted by the present invention to solve the technical problems is:

[0006] According to one aspect of the present application, a preparation method of a natural ink for collagen casings is provided, including the following steps:

[0007] (1) Mix chitosan with water, then add natural organic acid, and stir at 5000 - 7000 rpm for 5 - 15 min to obtain mixture A;

[0008] (2) Dissolve cocoa powder and lecithin in water at 80 - 100 °C, and stir evenly to obtain mixture B;

[0009] (3) Add water to the collagen mass for producing collagen casings, with the weight ratio of the collagen mass to water being 1:(5 - 7), and grind for 10 - 20 min to obtain mixture C;

[0010] (4) Add mixture B, mixture C, and TG enzyme to mixture A, and stir at 5000 - 7000 rpm for 20 - 40 min to obtain the natural ink for collagen casings.

[0011] Optionally, in step (1), the weight ratio of the chitosan to the natural organic acid is (1.2 - 1.8):1.

[0012] Optionally, the natural organic acid is selected from at least one of lactic acid, acetic acid, and citric acid.

[0013] Optionally, in step (2), the weight ratio of the cocoa powder to the lecithin is (10 - 15):1.

[0014] Optionally, the concentration of mixture A is 5 - 8% w / v.

[0015] Optionally, the concentration of mixture B is 17 - 22% w / v.

[0016] Optionally, the concentration of mixture C is 6.6 - 7.6% w / v.

[0017] Optionally, the addition amount of the TG enzyme is 0.005 - 0.015 g added per 100 mL of mixture C.

[0018] Optionally, in step (4), the weight ratio of mixture A, mixture B, and mixture C is (1.8 - 2.5):1:1.

[0019] According to another aspect of the present application, there is provided a natural ink for collagen casings, which is prepared by the preparation method of the natural ink for collagen casings described in any one of the above.

[0020] In the present application, "TG enzyme" refers to transglutaminase.

[0021] The beneficial effects of the present application include but are not limited to:

[0022] 1. In the preparation method of the natural ink for collagen casings of the present application, all raw materials used are of natural origin, having better biocompatibility and safety; among them, chitosan has good antibacterial, film-forming, adhesiveness, and biodegradability; as a natural pigment source, cocoa powder not only has a strong chocolate flavor and aroma but also can endow the ink with a natural color, better meeting consumers' demands for natural and healthy products; the addition of natural organic acids can make the solution acidic. Under acidic conditions, the amino groups in chitosan molecules will be protonated, thereby increasing its solubility in water; as an excellent natural emulsifier, lecithin can reduce the surface tension at the oil-water interface, evenly disperse cocoa powder in hot water, and prevent cocoa powder particles from aggregating and precipitating, thus ensuring that the ink has a uniform texture and performance.

[0023] 2. In the preparation method of the natural ink for collagen casings of the present application, the collagen solution has better adhesion to the collagen casing, and through the hot air drying and shaping stage, the cross-linking of TG enzyme and the collagen solution can better adhere cocoa powder to the casing; specifically, TG enzyme can catalyze the cross-linking reaction between protein molecules, forming a firm film on the surface of the collagen casing, which is not easy to fall off, thus ensuring the printing effect and durability of the ink on the casing; the preparation method is simple, does not involve complex equipment and synthetic raw materials, has higher safety, and is suitable for large-scale production.

[0024] 3. For the natural ink for collagen casings of the present application, the shaped casing does not fade when exposed to water, and the color is more stable after steaming, frying, and baking; after being printed on the sausage, the ink forms bright colors, patterns, or marks, which not only do not make consumers have a repulsive psychology but also greatly increase the appetite for the sausage and the recognition of the sausage product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0026] Figure 1 It is a schematic diagram of printing the ink of Example 2 on the casing after filling;

[0027] Figure 2 It is a schematic diagram of printing the ink of Example 2 on the casing and steaming at 100 °C for 30 min;

[0028] Figure 3 It is a schematic diagram of printing the ink of Example 2 on the casing and frying at 170 °C for 3 min;

[0029] Figure 4Schematic diagram after printing the ink of Example 2 on the casing and baking it in a baking machine at 150 °C for 25 min. Detailed implementation manners

[0030] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0031] For those not specifying specific conditions in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For raw materials or instruments not indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0032] The collagen mass involved below is the collagen mass involved in the invention authorized patent CN114223701A of the company.

[0033] Example 1

[0034] A preparation method of a natural ink for collagen casing, comprising the following steps:

[0035] (1) Mix chitosan with water, then add acetic acid. The weight ratio of chitosan to acetic acid is 1.2:1, and stir at 5000 rpm for 5 min to obtain a mixed solution A with a concentration of 5% w / v;

[0036] (2) Dissolve cocoa powder and lecithin with a weight ratio of 10:1 in water at 80 °C, and stir evenly to obtain a mixed solution B with a concentration of 17% w / v;

[0037] (3) Add water to the collagen mass (with a moisture content of 89%) for producing collagen casing. The weight ratio of the collagen mass to water is 1:7, and grind for 10 min to obtain a mixed solution C with a concentration of 6.6% w / v;

[0038] (4) Add the mixed solution B, the mixed solution C and TG enzyme to the mixed solution A. The addition amount of TG enzyme is 0.005 g per 100 mL of the mixed solution C. The weight ratio of the mixed solution A, the mixed solution B and the mixed solution C is 1.8:1:1, and stir at 5000 rpm for 20 min to obtain a natural ink for collagen casing.

[0039] Example 2

[0040] A preparation method of a natural ink for collagen casing, comprising the following steps:

[0041] (1) Mix chitosan with water, then add lactic acid. The weight ratio of chitosan to lactic acid is 1.5:1, and stir at 6000 rpm for 10 min to obtain a mixture A with a concentration of 6.8% w / v;

[0042] (2) Dissolve cocoa powder and lecithin with a weight ratio of 12.5:1 in water at 90 °C, stir evenly to obtain a mixture B with a concentration of 19.7% w / v;

[0043] (3) Add water to the collagen mass (with a water content of 89%) for producing collagen casings. The weight ratio of the collagen mass to water is 1:6, and grind for 15 min to obtain a mixture C with a concentration of 7.1% w / v;

[0044] (4) Add mixture B, mixture C and TG enzyme to mixture A. The addition amount of TG enzyme is 0.01 g per 100 mL of mixture C. The weight ratio of mixture A, mixture B and mixture C is 2.2:1:1, and stir at 6000 rpm for 30 min to obtain a natural ink for collagen casings.

[0045] Example 3

[0046] A preparation method of a natural ink for collagen casings, comprising the following steps:

[0047] (1) Mix chitosan with water, then add citric acid. The weight ratio of chitosan to citric acid is 1.8:1, and stir at 7000 rpm for 15 min to obtain a mixture A with a concentration of 8% w / v;

[0048] (2) Dissolve cocoa powder and lecithin with a weight ratio of 15:1 in water at 100 °C, stir evenly to obtain a mixture B with a concentration of 22% w / v;

[0049] (3) Add water to the collagen mass (with a water content of 89%) for producing collagen casings. The weight ratio of the collagen mass to water is 1:5, and grind for 20 min to obtain a mixture C with a concentration of 7.6% w / v;

[0050] (4) Add mixture B, mixture C and TG enzyme to mixture A. The addition amount of TG enzyme is 0.015 g per 100 mL of mixture C. The weight ratio of mixture A, mixture B and mixture C is 2.5:1:1, and stir at 7000 rpm for 40 min to obtain a natural ink for collagen casings.

[0051] Comparative Example 1

[0052] The difference from Example 2 is that the cocoa powder is replaced with chocolate powder.

[0053] Comparative Example 2

[0054] The difference from Example 2 is that TGase is not added.

[0055] Comparative Example 3

[0056] The difference from Example 2 is that the weight ratio of the collagen mass to water is 1:10, and the concentration of the mixed solution C is 5.5% w / v.

[0057] Comparative Example 4

[0058] Example 1 in the specific implementation manner of the specification of Chinese Invention Patent CN202311411408.3.

[0059] Performance Test

[0060] Pour the inks prepared in Examples 1-3 and Comparative Examples 1-3 onto a roller with a stereotype plate. The casing passes through the roller for printing and dyeing, and the printing and dyeing are dried and shaped by hot air. Steam the sausages prepared in Examples 1-3 and Comparative Examples 1-4 at 100 °C for 30 min; fry them at 170 °C for 3 min; bake them in a baking machine at 150 °C for 25 min, and observe whether the patterns fall off. The test results are shown in Table 1.

[0061] Table 1

[0062]

[0063] As can be seen from the results in Table 1, the natural ink for collagen casings prepared by the preparation method of the present application is safe and healthy, will not cause consumers to have a resistant psychology, and the casings after shaping do not fade when exposed to water, and the color is more stable after steaming, frying and baking; among them, the ink of Example 2 is printed on the casing, and after filling, as Figure 1 shown, after steaming at 100 °C for 30 min, as Figure 2 shown, after frying at 170 °C for 3 min, as Figure 3 shown, after baking in a baking machine at 150 °C for 25 min, as Figure 4 shown, the patterns are clear and the color is bright, which is beneficial to increasing the appetite for sausages.

[0064] As mentioned above, only the embodiments of the present application are concerned. The protection scope of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A preparation method of a natural ink for collagen casings, characterized in that, It includes the following steps: (1) Mix chitosan with water, then add natural organic acid, and stir at 5000 - 7000 rpm for 5 - 15 min to obtain mixture A; (2) Dissolve cocoa powder and lecithin in water at 80 - 100 °C, stir evenly to obtain mixture B; (3) Add water to the collagen mass for producing collagen casings, with the weight ratio of the collagen mass to water being 1:(5 - 7), grind for 10 - 20 min to obtain mixture C; (4) Add mixture B, mixture C and TG enzyme to mixture A, stir at 5000 - 7000 rpm for 20 - 40 min to obtain natural ink for collagen casings; Among them, in step (1), the weight ratio of the chitosan to the natural organic acid is (1.2 - 1.8):1; The natural organic acid is selected from at least one of lactic acid, acetic acid and citric acid; In step (2), the weight ratio of the cocoa powder to the lecithin is (10 - 15):1; The concentration of mixture A is 5 - 8% w / v; The concentration of mixture B is 17 - 22% w / v; The concentration of mixture C is 6.6 - 7.6% w / v; The addition amount of the TG enzyme is 0.005 - 0.015 g added per 100 mL of mixture C; In step (4), the weight ratio of mixture A, mixture B to mixture C is (1.8 - 2.5):1:

1.

2. A natural ink for collagen casings, characterized in that, The natural ink for collagen casings is prepared by the preparation method of the natural ink for collagen casings described in claim 1.

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