Water-resistant and high-temperature-resistant capsule blasting bead and preparation method thereof

Abstract

The invention belongs to the technical field of food and medicine health, and relates to a water-resistant and high-temperature-resistant capsule blasting bead and a preparation method thereof. The water-resistant and high-temperature-resistant capsule blasting bead comprises a core material and a wall material, and the core material comprises an oily solvent, a functional component and a first functional agent; the wall material comprises vegetable gum, gellan gum and a second functional agent, and the prepared capsule blasting bead has excellent water resistance and high temperature resistance, namely excellent stability.

Description

Technical Field

[0001] The present invention relates to the technical field of food and medical health, and in particular to a water-resistant and high-temperature-resistant capsule bursting bead and a preparation method thereof. Background Art

[0002] In the fields of food, health care products and cosmetics, capsule popping beads are highly favored for their unique taste release method and efficient ingredient delivery ability. However, the capsule popping beads currently on the market generally have insufficient water resistance and high temperature resistance when dealing with complex environments, especially humid and high temperature conditions. This defect not only limits the storage stability and shelf life of the popping bead products, but also affects their effectiveness and safety in various application scenarios. Specifically, water-resistant popping beads easily absorb water and swell in a humid environment, lose the bursting feeling, and even cause the wall material to rupture and the contents to leak; while high-temperature resistant popping beads may soften and deform under high temperature conditions, lose the bursting feeling or even rupture, affecting the overall quality of the product and consumer experience, and not utilizing the popping beads in other scenarios, and cannot meet the process environment in the subsequent production process of implanted products.

[0003] In terms of material selection, the rubber of the capsule bursting beads is usually composed of multiple components. If the rubber is mainly composed of hydrophilic materials, such as some natural rubbers (such as gelatin) containing a large number of hydrophilic groups such as hydroxyl and carboxyl groups, then when in contact with water, these groups will form hydrogen bonds with water molecules, causing the rubber to absorb water and swell and rupture. The filler inside the capsule bursting beads is also an important factor affecting the overall structural stability of the capsule bursting beads. If the internal filler is not compatible with the rubber, when the temperature changes or it is damp, the filler may separate or interact with the rubber, causing the capsule bursting beads to rupture. High acyl gellan gum is composed of four sugar units of glucose, glucuronic acid and rhamnose, with a molar ratio of 2:1:1. After removing the O-acyl group, it becomes low acyl gellan gum. Low acyl gellan gum has good gel properties. On the one hand, it can form hard and brittle gels and can be dissolved in cold water. The formed gel solution has a certain viscosity (which can be reduced by heating). On the other hand, low acyl gellan gum aqueous solution is very stable under neutral conditions of pH 7, and the temperature required for hydration can be reduced when a multivalent chelating agent (sodium citrate) is present. High acyl gellan gum can form an opaque elastic gel without the need for cations, while low acyl gellan gum can form a transparent brittle gel after heating and cooling in the presence of cations. Compared with other gelling agents (such as gelatin and carrageenan), gellan gum has better thermal stability and pH stability.

[0004] In terms of gelation mechanism, the gellan gum macromolecular chain first transforms from a random coil to a helical structure, and then the helical structure aggregates into a three-dimensional mesh gel, namely the "linking zone". Metal cations play an important role in the formation of gellan gum gel. Cations can directly connect to the carboxyl groups on the polysaccharide molecules through point-to-point binding, which weakens the electrostatic repulsion between the double helix chains and is conducive to the formation of the "linking zone". The stronger the chelation between oxygen atoms and metal cations, the greater the promotion effect on gel formation. The gel induced by monovalent cations is a thermoreversible gel, that is, the gel melts after heating, and this reversible process can be repeated. However, divalent cations (Ca 2+ ) The gel induced by the action of the electrolyte has higher thermal stability, and the melting temperature can reach above 120°C, which is a thermally irreversible gel. In addition, when the maximum gel strength is reached, the concentration of divalent cations is much lower than that of monovalent cations. In addition, gel temperature and pH are also important factors affecting the gelation of the popping bead rubber skin. The decrease in pH can also cause gellan gum to form a gel. The decrease in pH actually provides H+ to the system, which converts the originally negatively charged COO- into electrically neutral COOH, inhibits the charge repulsion, and is conducive to the formation of the "junction zone". The gelation temperature of gellan gum is between 30 and 50°C. The gelation rate of gellan gum is very fast. When the system temperature reaches the gel formation temperature, an "instant" gelation phenomenon occurs. The bursting feeling of the popping bead is the tactile sensation produced when the outer shell breaks and the internal encapsulated substance is released when the popping bead is subjected to external pressure (such as chewing or pressure changes). The shell material of the blasting bead rubber is an important factor affecting the blasting feeling of the blasting bead. Therefore, the blasting bead rubber formed under Ca2+ and low pH conditions has good high temperature resistance and water resistance, that is, the blasting bead will not deform or crack under high temperature and high humidity conditions and the blasting feeling of the blasting bead will not be affected.

[0005] As people's living standards improve, they have higher requirements for food. For example, nutritional food, functional food, health food, green food, organic food, etc. have become hot spots in the food consumption market. Natural extract products such as natural antioxidants, natural pigments, and natural flavors are widely favored by researchers. Compared with synthetic additives, most green food additives come from natural raw materials. After long-term consumption verification, they have low toxic side effects. In the production process of green food additives, physical extraction and other methods are usually used, which does not involve complex chemical synthesis and has no risk of chemical residues, ensuring the purity and safety of the product. Many green food additive raw materials come from renewable plants, microorganisms and other resources. For example, sodium alginate is extracted from seaweed, and plant essential oils are extracted from plants. These resources can be used sustainably, reducing dependence on non-renewable resources and conforming to the concept of environmental protection. Green food additives can not only meet the needs of popping beads for flavor, stability, etc., but also fit the current green and healthy consumption concept. For example, natural antioxidants such as vitamin E and rosemary extract, the addition of natural antioxidants can inhibit oxidation reactions, protect the easily oxidized components in the core material, and protect flavor substances from oxidation in some flavor popping beads, maintaining flavor stability. Sodium alginate is a natural polysaccharide extracted from seaweed, which has good thickening and gelling properties. In the preparation of the core material of the popping beads, the viscosity of the core material can be adjusted to form a stable colloidal state of the core material to prevent the precipitation and stratification of the components. It can be seen that the application prospects of green food additives in food are very broad.

[0006] In terms of preparation technology, uneven thickness may occur during the molding process of the capsule bursting beads. For example, when using the dripping or pressing process, due to factors such as the precision of the mold and the fluidity of the liquid glue, some parts of the rubber will be thicker and some parts will be thinner. In the water and temperature resistance test, the thinner parts are more susceptible to moisture penetration and temperature changes. In addition, the degree of cross-linking of the capsule bursting beads is also an important factor affecting its structural stability. If the degree of cross-linking of the rubber of the capsule bursting beads is not enough, the connection between the molecular chains is weak. When encountering moisture or temperature changes, the molecular chains are easy to slide and separate, which in turn affects the water and temperature resistance of the capsule bursting beads.

[0007] Therefore, developing a capsule bursting bead that is both water-resistant and high-temperature resistant is of great significance for improving product performance, broadening the scope of application and meeting market demand. Summary of the invention

[0008] The purpose of the present invention is to provide a water-resistant and high-temperature-resistant capsule bursting bead and a preparation method thereof, so as to solve the problems existing in the above-mentioned prior art.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] One of the technical solutions of the present invention is to provide a water-resistant and high-temperature-resistant capsule blasting bead, comprising a core material and a wall material;

[0011] The core material comprises: an oily solvent, a functional component and a first efficacy agent;

[0012] The wall material comprises: plant gum, gellan gum and a second functional agent.

[0013] Furthermore, the oily solvent includes at least one of medium chain triglycerides (MCT), long chain triglycerides, caprylic capric triglyceride, peanut oil, olive oil and sesame oil.

[0014] Further, the functional ingredients include at least one of DHA, sialic acid (SA), phosphatidylserine (PS), zeaxanthin and lutein ester;

[0015] Furthermore, the plant gum includes at least one of F516-I, gellan gum, carrageenan, guar gum, pectin, gum arabic and gelatin.

[0016] Furthermore, the first efficacy agent includes at least one of a surface tension enhancer, an antioxidant and a preservative.

[0017] Optionally, the surface tension enhancer includes at least one of NaCl, glycerol, sucrose, mannitol, starch, protein and cellulose.

[0018] Optionally, the antioxidant includes at least one of butylated hydroxytoluene, vitamin E, rosemary extract, propyl gallate, tert-butylhydroquinone, ascorbyl palmitate, butylated hydroxyanisole, cinnamon oil, tea polyphenols, citric acid and menthol.

[0019] Furthermore, the second functional agent is a plasticizer.

[0020] Optionally, the plasticizer includes at least one of epoxidized soybean oil, citrate, epoxidized linseed oil and fatty acid salts, aliphatic polyesters, triacetin, polyethylene glycol, propylene glycol, glycerol and triethyl citrate.

[0021] Furthermore, the preservative includes at least one of phenoxyethanol, tea polyphenols, citric acid, menthol, dipotassium glycyrrhizinate, cinnamon extract, nisin, chitosan, natamycin, xylitol and sorbitol.

[0022] Furthermore, the mass ratio of the oily solvent, the functional component and the antioxidant in the core material is 77-78:22.3-22.4:0.02, preferably 77.6:22.3:0.02.

[0023] Furthermore, the mass ratio of the vegetable gum to the gellan gum in the wall material is 3.5-3.8:0.8-1.0, preferably 4:1.

[0024] Furthermore, the mass proportion of the second functional agent in the wall material is 0.07-0.1%, preferably 0.08%.

[0025] The second technical solution of the present invention is to provide a method for preparing the water-resistant and high-temperature-resistant capsule bursting beads, the steps comprising:

[0026] Adding the first efficacy agent into the oily solvent and mixing evenly to obtain a mixed solution;

[0027] Adding the functional components into the mixed solution and stirring evenly to obtain the core material;

[0028] Adding plant gum, gellan gum and the second functional agent into water and stirring evenly to obtain a wall material;

[0029] The core material and the wall material are prepared by a pellet method to obtain the water-resistant and high-temperature-resistant capsule bursting beads.

[0030] Furthermore, the mass ratio of the sum of the mass of the plant gum, gellan gum and the second functional agent to water is 4.58:95.42.

[0031] Furthermore, the dripping head temperature of the dripping pill method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, and the receiving liquid is first passed through the first receiving liquid; then passed through the second receiving liquid at 40°C for 15 minutes.

[0032] Optionally, the first receiving liquid is liquid paraffin.

[0033] Optionally, the second receiving solution contains 0.5 wt.% chitosan, 1 wt.% glacial acetic acid and 3 wt.% calcium lactate.

[0034] The diameter of the drip nozzle in the present invention can be adjusted according to actual conditions and is not specifically limited.

[0035] The present invention discloses the following technical effects:

[0036] The compound use of plant gum, gellan gum and the second functional agent in the wall material of the present invention forms a dense and tough protective layer, which effectively blocks the penetration of water molecules and significantly improves the water resistance of the popping beads. Even in a humid environment, the integrity and functionality of the popping beads can be maintained. The specific ratio of plant gum, gellan gum and the second functional agent in the wall material of the present invention enables the wall material to maintain a stable structure and good thermal resistance under high temperature conditions. This high temperature resistance ensures that the popping beads will not soften, deform or crack in a high temperature environment, thereby ensuring the effectiveness and safety of the product.

[0037] At the same time, highly effective antioxidants, such as butylated hydroxytoluene (BHT), are introduced into the core material to effectively retard the oxidative degradation of oily solvents and functional ingredients, and enhance the overall stability of the popping beads.

[0038] The precise ratio of the oily solvent, the functional component and the first efficacy agent in the core material of the present invention not only ensures the taste and release effect of the popping beads, but also prolongs the shelf life of the product by adding antioxidants. The diversified selection of functional ingredients, such as DHA, sialic acid (SA), phosphatidylserine (PS), zeaxanthin and lutein esters, etc., give the popping beads more health benefits and functionality. DHA (docosahexaenoic acid) is a polyunsaturated fatty acid that is very important to the human body. It has the effects of promoting brain development and vision development for fetuses or infants, and improving memory and protecting the cardiovascular system for adults; sialic acid (SA), also known as sialic acid, has the chemical name N-acetylneuraminic acid, which also has the effect of improving brain development and cognitive function; phosphatidylserine (PS) is a phospholipid component naturally present in human cell membranes, which can improve brain cognitive function, relieve stress and improve mood, protect the cardiovascular system, etc.; zeaxanthin and lutein esters both have the effects of improving visual function, protecting eye health, and anti-oxidation. The combination of DHA, PS and SA can synergistically improve cognitive function and promote brain development; the combination of zeaxanthin and lutein ester can synergistically protect vision.

[0039] The present invention adopts the pellet method to prepare the popping beads, and realizes uniform wrapping and rapid solidification of the core material and the wall material by accurately controlling the parameters such as the drip head temperature, the glue tank temperature, the core material temperature and the drip nozzle diameter. The method is simple to operate, easy to control, and has high production efficiency, which is conducive to industrial production.

[0040] In terms of high temperature resistance, the plant gum F516-I and gellan gum in the wall material of the present invention have certain differences in molecular structure. Plant gum is usually a polysaccharide substance, and its molecular chain contains a variety of functional groups, such as hydroxyl groups, etc.; gellan gum is a microbial extracellular polysaccharide with a unique helical structure. When they are used together in the rubber skin of the capsule bursting beads, as the temperature rises, an interwoven network structure can be formed, and the long-chain molecules of the plant gum can be interspersed between the helical structures of the gellan gum. At high temperatures, this structure can limit the movement of the molecular chains, thereby improving the thermal stability of the rubber skin. In addition, gellan gum has good thermal stability within a certain temperature range, and its gel state can still maintain a certain strength at higher temperatures. When the plant gum F516-I and gellan gum can increase the viscosity and elasticity of the system, reduce the softening and deformation of the rubber skin due to temperature changes, so that the bursting bead capsules can still maintain their shape and integrity at higher temperatures.

[0041] In terms of water resistance, the plant gum F516-I and gellan gum used in the present invention both have a certain degree of hydrophilicity. After the plant gum and gellan gum are used together, hydrogen bonds or van der Waals forces and other interactions will be formed between their functional groups, and this interaction can reduce the overall water absorption to a certain extent. In a dry state, their functional groups are interconnected. When in contact with water, this connection can prevent water molecules from fully contacting the hydrophilic groups on a single gum molecule, thereby reducing water absorption and enhancing the water resistance of the capsules. In addition, after gellan gum forms a gel, its three-dimensional network structure can prevent the entry of water molecules to a certain extent; the plant gum can be filled in the gaps in the network structure of the gellan gum, further enhancing this barrier effect, so that the water resistance of the capsules is further improved.

[0042] The molecules of triethyl citrate (TEC) used in the wall material of the present invention have certain flexibility and can be interspersed between the polymer chains of the rubber material to play a role similar to that of a "lubricant" to reduce the friction between the polymer chains. The addition of TEC can significantly improve the flexibility of the rubber. When the rubber is subjected to a tensile force, the polymer chains can slide and stretch more smoothly, reducing the original brittleness of the rubber material. In addition, it can also enhance the toughness of the rubber. The presence of TEC enables the rubber to absorb more energy during the stretching process because it can play a buffering role between the polymer chains. When a tensile force acts on the rubber, the TEC molecules can disperse the stress through their own deformation to prevent the stress from concentrating in a local area and causing the material to break.

[0043] The present invention successfully solves the problems of the existing capsule bursting beads being not resistant to water and high temperatures by optimizing the formula design of the core material and the wall material and adopting an innovative preparation method, thereby improving the performance stability and market competitiveness of the product and providing strong technical support for the development of related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 The photos of the core material prepared in step S5 of Example 1 before and after being left to stand for 24 hours, wherein a is before standing and b is after standing;

[0046] Figure 2 This is a physical picture of the capsule bursting beads prepared in step S7 of Example 1;

[0047] Figure 3This is a physical picture of the capsule bursting beads prepared in Comparative Example 3, wherein a is plant gum (F516-I): sorbitol = 7.84:0.16, b is plant gum (F516-I): sorbitol = 13.23:0.27, c is the diameter of a, and d is the diameter of b;

[0048] Figure 4 The photos of the core material prepared in step S5 of comparative example 5 before and after standing still, wherein a is before standing still, and b is after standing still for 30 minutes;

[0049] Figure 5 These are photos of the core material prepared in step S5 of comparative example 6 before and after standing still, where a is before standing still and b is after standing still for 30 minutes. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0051] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0052] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0053] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0054] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0055] Example 1

[0056] The preparation steps of water-resistant and high temperature-resistant capsule bursting beads are as follows:

[0057] S1. Core material: prepare core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.6:20:2:0.2:0.167:0.02;

[0058] Wall material: prepare wall material raw materials of vegetable gum (F516-I), gellan gum and TEC in a mass ratio of 3.6:0.9:0.025;

[0059] The first receiving solution (liquid paraffin), the second receiving solution (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate);

[0060] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0061] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0062] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0063] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0064] S6, adding plant gum (F516-I), gellan gum and TEC into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of plant gum (F516-I), gellan gum and TEC to water is 4.53:95.47;

[0065] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the temperature of the dropper of the pill dropping method is 55°C, the temperature of the glue tank is 65°C, the temperature of the core material is 40°C, the diameter of the dropper nozzle is 5.5mm, and the receiving liquid is first passed through the first receiving liquid (liquid paraffin); then passed through the second receiving liquid (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate) for 15 minutes, and dried in a 40°C oven.

[0066] Figure 1 The photos of the core material prepared in step S5 of Example 1 before and after being left to stand for 24 hours are shown in Figure 1, where a is before standing and b is after standing. Figure 1 It can be seen that the core material prepared in step S5 does not delaminate or change color after standing for 24 hours, and has excellent stability.

[0067] Figure 2 The actual picture of the capsule bursting beads prepared in step S7 is shown in FIG. Figure 2 It can be seen that the capsules prepared by the method of Example 1 are uniform and round in size.

[0068] Example 2

[0069] The preparation steps of water-resistant and high temperature-resistant capsule bursting beads are as follows:

[0070] S1. Core material: prepare core material raw materials MCT, DHA, SA, PS, soy protein, zeaxanthin, lutein ester and BHT according to the mass ratio of 71.8:2.5:20:2:3:0.2:0.5:0.02;

[0071] Wall material: prepare wall material raw materials of vegetable gum (F516-I), gellan gum and TEC in a mass ratio of 3.6:0.9:0.025;

[0072] S2, adding BHT to MCT and mixing evenly to obtain a mixed solution;

[0073] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0074] S4, adding zeaxanthin, PS, soy protein and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester, PS, soy protein solution;

[0075] S5, mixing the DHA and SA solutions and the zeaxanthin / lutein ester, PS, and soy protein solutions evenly to obtain a core material;

[0076] S6, adding plant gum (F516-I), gellan gum and TEC into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of plant gum (F516-I), gellan gum and TEC to water is 4.58:95.42;

[0077] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the temperature of the dropper of the pill dropping method is 55°C, the temperature of the glue tank is 65°C, the temperature of the core material is 40°C, the diameter of the dropper nozzle is 5.5mm, and the first receiving liquid (liquid paraffin) is passed through; then the second receiving liquid (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate) is passed through for 15 minutes, and dried in a 40°C oven.

[0078] Example 3

[0079] The preparation steps of water-resistant and high temperature-resistant capsule bursting beads are as follows:

[0080] S1. Core material: prepare core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.6:20:2:0.2:0.167:0.02;

[0081] Wall material: prepare wall material raw materials of vegetable gum (F516-I), gellan gum, beeswax and TEC in a mass ratio of 3.6:0.9:0.1:0.025;

[0082] The first receiving solution (liquid paraffin), the second receiving solution (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate);

[0083] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0084] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0085] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0086] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0087] S6, adding plant gum (F516-I), gellan gum and TEC into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of plant gum (F516-I), gellan gum and TEC to water is 4.63:95.37;

[0088] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the temperature of the dropper of the pill dropping method is 55°C, the temperature of the glue tank is 65°C, the temperature of the core material is 40°C, the diameter of the dropper nozzle is 5.5mm, and the receiving liquid is first passed through the first receiving liquid (liquid paraffin); then passed through the second receiving liquid (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate) for 15 minutes, and dried in a 40°C oven.

[0089] Example 4

[0090] The preparation steps of water-resistant and high temperature-resistant capsule bursting beads are as follows:

[0091] S1. Core material: prepare core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.6:20:2:0.2:0.167:0.02;

[0092] Wall material: prepare wall material raw materials of vegetable gum (F516-I), gellan gum and TEC in a mass ratio of 3.6:0.9:0.025;

[0093] The first receiving solution (liquid paraffin); the second receiving solution (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate);

[0094] Prepare coating raw materials of corn protein, TEC, talcum powder and ethanol in a mass ratio of 6:0.8:1.5:70.

[0095] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0096] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0097] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0098] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0099] S6, adding plant gum (F516-I), gellan gum and TEC into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of plant gum (F516-I), gellan gum and TEC to water is 4.53:95.47;

[0100] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the temperature of the dropper of the pill dropping method is 55°C, the temperature of the glue tank is 65°C, the temperature of the core material is 40°C, the diameter of the dropper nozzle is 5.5mm, and the receiving liquid is first passed through the first receiving liquid (liquid paraffin); then passed through the second receiving liquid (0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate) for 15 minutes, and dried in a 40°C oven.

[0101] S8. The prepared capsules were coated using a Glatt fluidized bed. The coating parameters were as follows: atomization pressure of 0.51 bar, wind pressure of 0.45 bar, and flow rate of 0.5 mL / min.

[0102] Comparative Example 1

[0103] The preparation steps of capsule bursting beads are as follows:

[0104] S1. Core material: prepare core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02;

[0105] Wall material: prepare the wall material raw materials of vegetable glue (F516-I) and gelatin in a mass ratio of 4:1;

[0106] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0107] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0108] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0109] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0110] S6. Adding the vegetable gum (F516-I) and sorbitol into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) and sorbitol to the mass of water is 4:96;

[0111] S7. The core material and the wall material are made into water-resistant and high-temperature resistant plastic pellets through a pellet method, wherein the drip head temperature of the pellet method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the drip nozzle diameter is 5.5mm, and the receiving liquid is liquid paraffin.

[0112] Comparative Example 2

[0113] The preparation steps of capsule bursting beads are as follows:

[0114] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I) and gellan gum according to the mass ratio of 4:1;

[0115] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0116] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0117] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0118] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0119] S6. Adding the vegetable gum (F516-I) and sorbitol into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) and the gellan gum to the mass of water is 8:192;

[0120] S7. The core material and the wall material are made into water-resistant and high-temperature resistant plastic pellets through a pill dropping method, wherein the dripper temperature of the pill dropping method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the drip nozzle diameter is 5.5mm, and the receiving liquid is a 2.5% calcium lactate aqueous solution.

[0121] Comparative Example 3

[0122] The preparation steps of capsule bursting beads are as follows:

[0123] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I) and sorbitol according to the mass ratio of 7.84:0.16 or 13.23:0.27;

[0124] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0125] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0126] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0127] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0128] S6. Adding the vegetable gum (F516-I) and sorbitol into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) and sorbitol to the mass of water is 8:192 or 13.5:286.5;

[0129] S7. The core material and the wall material are made into water-resistant and high-temperature resistant plastic pellets through a pellet method, wherein the drip head temperature of the pellet method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the drip nozzle diameter is 5.5mm, and the receiving liquid is liquid paraffin.

[0130] Figure 3 This is a physical picture of the capsule bursting beads prepared in comparative example 3, where a is plant gum (F516-I): sorbitol = 7.84:0.16, b is plant gum (F516-I): sorbitol = 13.23:0.27, c is the diameter of a, and d is the diameter of b. Figure 3 It can be seen that the capsules prepared in Comparative Example 3 are relatively round, but the capsules prepared with the ratio of plant gum (F516-I): sorbitol = 13.23:0.27 have a smaller diameter.

[0131] Comparative Example 4

[0132] The preparation steps of capsule bursting beads are as follows:

[0133] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I) and sorbitol according to the mass ratio of 13.23:0.27;

[0134] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0135] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0136] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0137] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0138] S6. Adding the vegetable gum (F516-I) and sorbitol into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) and sorbitol to the mass of water is 13.5:286.5;

[0139] S7. The core material and the wall material are made into water-resistant and high-temperature resistant plastic pellets through a pellet method, wherein the drip head temperature of the pellet method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the drip nozzle diameter is 5.5mm, and the receiving liquid is liquid paraffin.

[0140] Comparative Example 5

[0141] The preparation steps of capsule bursting beads are as follows:

[0142] S1. Prepare core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare wall material raw materials plant gum (F516-I), sorbitol and gellan gum according to the mass ratio of 10.584:0.216:2.7.

[0143] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0144] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0145] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0146] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0147] S6. Adding vegetable gum (F516-I), sorbitol and gellan gum into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of vegetable gum (F516-I), sorbitol and gellan gum to water is 12:288;

[0148] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the dropper temperature of the pill dropping method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the dropper diameter is 5.5mm, and the receiving liquid is 0.50% chitosan, 3.85% calcium lactate, and 95.65% water.

[0149] Figure 4 These are photos of the core material prepared in step S5 of comparative example 5 before and after standing still, wherein a is before standing still, and b is after standing still for 30 minutes.

[0150] Comparative Example 6

[0151] The preparation steps of capsule bursting beads are as follows:

[0152] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I), sorbitol and gellan gum according to the mass ratio of 9.408:0.192:2.4;

[0153] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0154] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0155] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0156] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0157] S6. Adding vegetable gum (F516-I), sorbitol and gellan gum into 75° C. water and stirring evenly to obtain a wall material, wherein the mass ratio of the sum of the mass of vegetable gum (F516-I), sorbitol and gellan gum to the mass of water is 13.5:286.5;

[0158] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the dropper temperature of the pill dropping method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the dropper diameter is 5.5mm, and the receiving liquid is 0.50% chitosan, 3.85% calcium lactate and 95.65% water.

[0159] Figure 5 The following are photos of the core material prepared in step S5 of comparative example 6 before and after standing still, where a is before standing still and b is after standing still for 30 minutes. Figure 5 It can be seen that after standing for 30 minutes, the core material showed obvious stratification.

[0160] Comparative Example 7

[0161] The preparation steps of capsule bursting beads are as follows:

[0162] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I), sorbitol and gellan gum according to the mass ratio of 14.112:0.288:3.6;

[0163] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0164] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0165] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0166] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0167] S6, adding the vegetable gum (F516-I) and gelatin into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) sorbitol and gellan gum to the mass of water is 18:382;

[0168] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the dropper temperature of the pill dropping method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the dropper diameter is 5.5mm, and the receiving liquid is 0.5% chitosan, 1% glacial acetic acid, 2% calcium lactate and 96.5% water.

[0169] Comparative Example 8

[0170] The preparation steps of capsule bursting beads are as follows:

[0171] S1. Prepare the core material raw materials MCT, DHA, SA, zeaxanthin, lutein ester and BHT according to the mass ratio of 77.613:20:2:0.2:0.167:0.02; prepare the wall material raw materials plant gum (F516-I), sorbitol and gellan gum according to the mass ratio of 14.112:0.288:3.6;

[0172] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0173] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0174] S4, adding zeaxanthin and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester solution;

[0175] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0176] S6, adding the vegetable gum (F516-I) and gelatin into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of the vegetable gum (F516-I) sorbitol and gellan gum to the mass of water is 18:382;

[0177] S7. The core material and the wall material are made into water-resistant and high-temperature resistant plastic pellets through the pill dropping method. The temperature of the dropper of the pill dropping method is 55°C, the temperature of the glue tank is 65°C, the temperature of the core material is 40°C, and the diameter of the dropper nozzle is 5.5mm. Among them, the receiving liquid 1 is 0.5% chitosan, 1% glacial acetic acid, 2% calcium lactate, 96.5% water (immersion for 15 minutes, drying temperature is 30°C); the receiving liquid 2 is 0.5% chitosan, 1% glacial acetic acid, 2% calcium lactate, 96.5% water (immersion for 15 minutes, drying temperature is 40°C); the receiving liquid 3 is 0.5% chitosan, 1% glacial acetic acid, 2% calcium lactate, 96.5% water (immersion for 30 minutes, drying temperature is 30°C); the receiving liquid 4 is 0.5% chitosan, 1% glacial acetic acid, 2% calcium lactate, 96.5% water (immersion for 30 minutes, drying temperature is 40°C ); receiving solution 5 is 0.5% chitosan, 1% acetic acid, 3% calcium lactate, 96.5% water (immersion for 15 minutes, drying temperature is 30°C); receiving solution 6 is 0.5% chitosan, 1% acetic acid, 3% calcium lactate, 96.5% water (immersion for 15 minutes, drying temperature is 40°C); receiving solution 7 is 0.5% chitosan, 1% acetic acid, 3% calcium lactate, 96.5% water (immersion for 30 minutes, drying temperature is 30°C); receiving solution 8 is 0.5% chitosan, 1% acetic acid, 3% calcium lactate, 96.5% water (immersion for 30 minutes, drying temperature is 40°C).

[0178] Comparative Example 9

[0179] The preparation steps of water-resistant and high temperature-resistant capsule bursting beads are as follows:

[0180] S1. Prepare the core material raw materials MCT, DHA, SA, PS, zeaxanthin, lutein ester and BHT according to the mass ratio of 74.8:2.5:20:2:0.2:0.5:0.02; prepare the wall material raw materials plant gum (F516-I), gellan gum and TEC according to the mass ratio of 3.6:0.9:0.07, 3.6:0.9:0.05, 3.6:0.9:0.03 or 3.6:0.9:0.25 respectively;

[0181] S2, adding BTH to MCT and mixing evenly to obtain a mixed solution;

[0182] S3, adding SA to a mixed solution of equal mass with SA, mixing and grinding for 30 minutes to obtain a SA solution;

[0183] S4, adding zeaxanthin, PS and lutein ester to the remaining mixed solution, and homogenizing twice with a wall breaking machine, each time for 3 minutes, to obtain a zeaxanthin / lutein ester, PS solution;

[0184] S5, mixing the DHA, SA solution and zeaxanthin / lutein ester solution evenly to obtain a core material;

[0185] S6, adding plant gum (F516-I), gellan gum and TEC into 75°C water, stirring evenly, to obtain a wall material, wherein the mass ratio of the sum of the mass of plant gum (F516-I), gellan gum and TEC to water is 4.58:95.42;

[0186] S7. The core material and the wall material are made into water-resistant and high-temperature resistant capsule bursting beads through the pill dropping method, wherein the dropper temperature of the pill dropping method is 55°C, the glue tank temperature is 65°C, the core material temperature is 40°C, the dropper nozzle diameter is 5.5mm, and the receiving liquid is 0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate, and 96.5% water (immersed for 15 minutes, and the drying temperature is 40°C).

[0187] Test example

[0188] The popping beads prepared in Example 1 and Comparative Examples 2 to 7 were placed in an oven and hot water at 80°C and 100°C for 10 min, 20 min, 30 min and 60 min, and the changes in appearance were observed. The results are shown in Table 1.

[0189] Table 1

[0190]

[0191]

[0192] The popping beads prepared in Comparative Example 8 were placed in an oven and hot water at 80°C and 100°C for 10 min, 20 min, 30 min and 60 min, and the changes in appearance were observed. The results are shown in Table 2.

[0193] Table 2

[0194]

[0195]

[0196] It can be seen from the experimental results of Comparative Example 8 that when the receiving liquid is liquid paraffin-0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate, 96.5% water (immersion 15 minutes, drying temperature is 40°C), liquid paraffin-0.5% chitosan, 1% glacial acetic acid, 3% calcium lactate, 96.5% water (immersion 30 minutes, drying temperature is 40°C), the capsule beads prepared by the glue dripping method have better high temperature resistance and water resistance.

[0197] The popping beads prepared in Comparative Example 9 were placed in an oven and hot water at 80°C and 100°C for 10 min, 20 min, 30 min and 60 min, and the appearance changes were observed. The results are shown in Table 3 (capsules were prepared only at a ratio of 3.6:0.9:0.25).

[0198] Table 3

[0199]

[0200] When the ratio of F516-I, gellan gum and TEC is 3.6:0.9:0.07, 3.6:0.9:0.05 and 3.6:0.9:0.03, the compliance and tensile strength of the bead-bursting rubber are poor. When the ratio of F516-I, gellan gum and TEC is 3.6:0.9:0.25, the tensile strength, compliance and other properties of the bead-bursting rubber are good.

[0201] The high temperature experiment was carried out on the capsule bursting beads prepared in Example 1:

[0202] The capsule bursting beads prepared in Example 1 were respectively stuffed into fruit juice jelly (high water content) and vitamin C jelly (low water content), placed in a 100°C oven for 10 minutes and then transferred to an 80°C oven for 30 minutes. The jelly was cooled and checked for the rupture of the bursting beads and whether there was still a sense of rupture. The results are shown in Table 4. After the jelly was cooled, the bursting beads were not broken and there was a sense of blasting.

[0203] Table 4

[0204]

[0205] The soft candy test was carried out on the capsules prepared in Example 1. The results are shown in Table 5:

[0206] The capsules prepared in Example 1 were stuffed into fruit jelly (high water content) and vitamin C jelly (low water content) respectively, and placed in a 40°C oven for 3 months. The jelly was cooled to check the rupture of the jelly and whether it still had a sense of rupture. The results are shown in Table 3. After the jelly was cooled, the jelly had no rupture and had a sense of rupture. There was no rupture in the fruit jelly and vitamin C jelly after 3 months. The jelly had a strong rupture after 10 days in the fruit jelly, and the rupture became weak after 30 days. The jelly had an excellent rupture after 3 months in the vitamin C jelly.

[0207] Table 5

[0208]

[0209] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A water-resistant and high-temperature resistant capsule blasting bead, comprising a core material and a wall material, characterized in that: The core material comprises: an oily solvent, a functional component and a first efficacy agent; The first efficacy agent includes at least one of a surface tension enhancer, an antioxidant, and a preservative; The wall material comprises: plant gum, gellan gum and a second functional agent; The second functional agent is a plasticizer.

2. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The oily solvent includes at least one of medium-chain triglycerides, long-chain triglycerides, caprylic-capric triglycerides, peanut oil, olive oil and sesame oil.

3. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The functional ingredients include at least one of DHA, sialic acid, phosphatidylserine, zeaxanthin and lutein ester.

4. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The surface tension enhancer comprises at least one of NaCl, glycerol, sucrose, mannitol, starch, protein and cellulose; and / or, The antioxidant comprises at least one of butylated hydroxytoluene, vitamin E, rosemary extract, propyl gallate, tert-butylhydroquinone, ascorbyl palmitate, butylated hydroxyanisole, cinnamon oil, tea polyphenols, citric acid and menthol; and / or, The plasticizer comprises at least one of epoxidized soybean oil, citrate, epoxidized linseed oil, fatty acid salt, aliphatic polyester, triacetin, polyethylene glycol, propylene glycol, glycerol and triethyl citrate; and / or, The preservative comprises at least one of phenoxyethanol, tea polyphenols, citric acid, menthol, dipotassium glycyrrhizinate, cinnamon extract, nisin, chitosan, natamycin, xylitol and sorbitol.

5. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The vegetable gum includes at least one of F516-I, gellan gum, carrageenan, guar gum, pectin, gum arabic and gelatin.

6. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The mass ratio of the oily solvent, the functional component and the antioxidant in the core material is (77-78):(22.3-22.4):0.

02.

7. The water-resistant and high-temperature-resistant capsule blasting beads according to claim 1, characterized in that: The mass ratio of plant gum to gellan gum in the wall material is 3.5-3.8:0.8-1; the mass proportion of TEC and / or VE in the wall material is 0.07-0.1wt.%.

8. A method for preparing water-resistant and high-temperature resistant capsule bursting beads as claimed in any one of claims 1 to 7, characterized in that the steps include: Adding the first efficacy agent into the oily solvent and mixing evenly to obtain a mixed solution; Adding the functional components into the mixed solution and stirring evenly to obtain the core material; Adding plant gum, gellan gum and the second functional agent into water and stirring evenly to obtain a wall material; The core material and the wall material are prepared by a pellet method to obtain the water-resistant and high-temperature-resistant capsule bursting beads.

9. The preparation method according to claim 8, characterized in that: The mass ratio of the sum of the masses of the vegetable gum, gellan gum and the second functional agent to water is 4.58:95.

42.

10. The preparation method according to claim 8, characterized in that: The pill dropping method is to first pass through a first receiving liquid and then pass through a second receiving liquid; the first receiving liquid is liquid paraffin; the second receiving liquid contains 0.5wt.% chitosan, 1wt.% glacial acetic acid and 3wt.% calcium lactate.

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