A plant gum powder composition, a plant soft capsule and a preparation method thereof

Abstract

The present application relates to the technical field of plant soft capsules, and particularly relates to a plant glue powder composition, a plant soft capsule and a preparation method thereof. The present application improves the glue solution performance by optimizing the raw materials of the plant glue powder composition and the performance of the prepared plant soft capsule. The capsule skin tensile strength of the plant soft capsule prepared by using the plant glue powder composition of the present application is obviously improved, and the transparency is also significantly improved, which provides an effective method for improving the quality of the plant soft capsule. The preparation method of the plant soft capsule provided by the present application is simple and efficient, easy to scale production, and has good application value in the field of plant soft capsule preparation.

Description

Technical Field

[0001] This invention relates to the field of plant-based soft capsule technology, and more particularly to a plant-based gum powder composition, plant-based soft capsules, and a method for preparing the same. Background Technology

[0002] Plant-based soft capsules use natural plant gum powder to prepare the capsule shell. These materials are widely available, environmentally friendly, and sustainable, aligning with modern environmental protection principles. They also reduce reliance on animal resources and avoid potential allergic reactions caused by animal proteins. In terms of performance, plant-based soft capsules provide excellent protection for the internal medications or nutrients, exhibiting strong stability, good temperature resistance, and maintaining product quality well under various environmental conditions. Plant-based soft capsules are easy to swallow, making them especially suitable for children, the elderly, and those with swallowing difficulties. They rapidly disintegrate and release their contents after entering the body, resulting in rapid absorption and high bioavailability. With the expansion of the market and the broadening of application areas, higher demands are being placed on the quality and performance of plant-based soft capsules.

[0003] Plant-based gum soft capsules have high shell toughness, good film-forming properties, fast gelation speed, and the shell surface is not easy to stick together, resulting in good storage stability. However, their production cost is high, the gel strength and shell transparency are low, and the disintegration time is long. Although the overall performance of the shell can be improved by compounding the colloids, the compatibility and matching degree between the colloids cause problems for industrial production. The overall performance of the shell is still insufficient compared with gelatin soft capsules. Summary of the Invention

[0004] This invention provides a plant-based gum powder composition, plant-based soft capsules, and a method for preparing the same.

[0005] To address the issues of low tensile strength and poor transparency in plant-based soft capsules, this invention first optimizes the raw material system for preparing the soft capsules. During the research and development process, this invention discovered that simultaneously controlling the viscosity of hydroxypropyl starch and the sulfate content in carrageenan—that is, using a blend of hydroxypropyl starch with a specific viscosity range and carrageenan with a specific sulfate content—can significantly improve the tensile strength and transparency of the plant-based soft capsules. This effectively enhances the tensile strength and transparency of the prepared plant-based soft capsules while ensuring the properties of the plant-based adhesive.

[0006] Specifically, the present invention provides the following technical solutions.

[0007] In a first aspect, the present invention provides a plant gum powder composition, the composition comprising hydroxypropyl starch and carrageenan; The viscosity of the hydroxypropyl starch is 200-400 mPa·s; the viscosity is measured by stirring and dissolving a 5% hydroxypropyl starch solution in water at 92°C for 20 minutes using a viscometer. The sulfate content of the carrageenan is 25%-35%.

[0008] Hydroxypropyl starch is a modified starch, and carrageenan is a plant colloid. Both are known plant-based raw materials that can be used to prepare soft capsules. However, there are few reports in the prior art on the effects of the viscosity of hydroxypropyl starch and the sulfate content of carrageenan on the properties of the gel and soft capsules. Excluding environmental factors, the viscosity of hydroxypropyl starch varies due to its degree of substitution and source. The chemical structure of carrageenan is a polysaccharide sulfate ester composed of galactose and dehydrated galactose, containing calcium, potassium, sodium, and ammonium salts. Based on the different sulfate binding forms and contents, carrageenan is divided into different types, among which type K and type I carrageenan are more commonly used in plant capsule preparation. Currently, the viscosity of hydroxypropyl starch raw materials commonly used in the preparation of plant soft capsules is usually between 500-20000 mPa·s, and the sulfate content in carrageenan raw materials is usually between 10%-40%, which is significantly different from the raw material requirements of this invention. This invention has found that hydroxypropyl starch with a viscosity range of 200-400 mPa·s and carrageenan with a sulfate content range of 25%-35% can work well together to significantly improve the tensile strength and transparency of plant soft capsules.

[0009] The hydroxypropyl starch and carrageenan used in this invention can be prepared using known methods for preparing hydroxypropyl starch and carrageenan.

[0010] In some specific embodiments of the present invention, the preparation method of hydroxypropyl starch with a viscosity of 200-400 mPa·s is as follows: Starch (isopropanol can be used) is suspended to prepare a suspension, sodium hydroxide is added, and the reaction is carried out at 32-37℃ for 20-40 min; then propylene oxide is added dropwise at 45-50℃ for 1.8-2.2 h until the reaction is completed, and the reaction is continued. After the reaction is completed, the reaction system is neutralized with acid. The mass ratio of starch to propylene oxide is 500:(1500-2500).

[0011] In some specific embodiments of the present invention, the preparation method of carrageenan with a sulfate ester content of 25%-35% is as follows: Red algae were extracted with hot water to obtain a crude carrageenan extract. Concentrated sulfuric acid was added dropwise to the crude extract to carry out the reaction. After the addition was completed, the reaction was carried out at 40-45℃ for 1.8-2.2 hours. After the reaction was completed, the reaction system was neutralized with alkali solution.

[0012] In the plant gum powder composition of the present invention, the preferred mass ratio of hydroxypropyl starch to carrageenan is (6-10):(1-4).

[0013] More preferably, the mass ratio of hydroxypropyl starch to carrageenan in the composition is (7-9):(1-3), more preferably (7-9):(2-3).

[0014] Preferably, the plant gum powder composition of the present invention further includes a plasticizer; the plasticizer includes at least one selected from sorbitol, glycerin, propylene glycol, polyethylene glycol, mannitol and xylitol.

[0015] In some embodiments of the present invention, the plasticizer is sorbitol or glycerol.

[0016] Preferably, the plant gum powder composition of the present invention further includes inorganic salts; the inorganic salts include at least one selected from sodium chloride, sodium carbonate, sodium sulfate, sodium citrate, disodium hydrogen phosphate, sodium dihydrogen phosphate, potassium chloride, potassium carbonate, potassium citrate, potassium nitrate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, calcium chloride, and calcium carbonate.

[0017] More preferably, the inorganic salt is sodium chloride, sodium carbonate, sodium sulfate, sodium citrate, disodium hydrogen phosphate, sodium dihydrogen phosphate, potassium chloride, potassium carbonate, potassium citrate, potassium nitrate, dipotassium hydrogen phosphate, or potassium dihydrogen phosphate. More preferably, it is sodium chloride, sodium carbonate, sodium sulfate, sodium citrate, disodium hydrogen phosphate, or sodium dihydrogen phosphate.

[0018] In some embodiments of the present invention, the inorganic salt is sodium chloride or sodium carbonate.

[0019] Preferably, the ratio of hydroxypropyl starch, carrageenan, plasticizer, and inorganic salt in the plant gum powder composition is (6-10):(1-4):(0.5-2):(0.01-0.1).

[0020] More preferably, the ratio of hydroxypropyl starch, carrageenan, plasticizer, and inorganic salt in the plant gum powder composition is (7-9):(1-3):(0.5-2):(0.01-0.1). More preferably, it is (7-9):(2-3):(0.5-2):(0.01-0.1).

[0021] The plant gum powder composition of the present invention is used to prepare the capsule shell of plant soft capsules.

[0022] Preferably, the plant gum powder composition is a solid preparation, specifically plant gum powder. This plant gum powder composition can be mixed with water and then subjected to gelatinization or other treatments to obtain a gelling liquid for preparing capsule shells.

[0023] Secondly, the present invention provides the application of the above-described plant gum powder composition in the preparation of plant soft capsules or capsule shells.

[0024] Thirdly, the present invention provides a method for preparing plant soft capsules using the above-described plant gum powder composition, the method comprising one or more of the following steps (1)-(2): (1) The plant gum powder composition is mixed with water and then gelatinized to obtain a glue solution; (2) The contents of the soft capsule are compressed with the adhesive liquid and the contents are encapsulated with the capsule shell formed by the adhesive liquid.

[0025] In step (1) above, the gelatinization temperature is 90-120℃. The gelatinization time is 30-60 min.

[0026] In step (1) above, the mass ratio of the plant gum powder composition to water is 1:(1.2-1.7). Preferably, it is 1:(1.4-1.6).

[0027] In step (1) above, the air bubbles are removed after gelatinization to obtain the adhesive solution.

[0028] In step (2) above, the contents and the gelatin solution obtained in step (1) are compressed into pellets using a soft capsule machine. The temperature in the pelleting chamber is 20-25℃, and the humidity is 30-50%. The temperature of the heating tape is controlled at 85-95℃, the temperature of the capsule is controlled at 83-87℃, the spray is heated to 45±2℃, the pelleting speed is controlled at 1.5-2.5 rpm, the thickness of the capsule shell is 0.50-0.60 mm, and the width of the capsule shell is controlled at 230-240 mm.

[0029] In step (2) above, after pellet pressing, a drying step may also be included, wherein the drying is performed until the hardness of the pellets meets the requirements (preferably 50-70N) and pellet selection is performed.

[0030] Fourthly, the present invention provides a capsule shell for a soft capsule, which is prepared using the plant gum powder composition described above.

[0031] The capsule shells prepared using the above-described plant-based gum powder composition have high tensile strength and high transparency, which can significantly improve the quality of plant-based soft capsules.

[0032] The above-mentioned method for preparing capsule shells includes: mixing the plant gum powder composition with water and then gelatinizing it to obtain a gel solution; and then pressing and drying it to obtain the capsule shells.

[0033] Fifthly, the present invention provides a plant-based soft capsule comprising the capsule shell and contents described above.

[0034] The above-mentioned plant-based soft capsules have no special restrictions on their contents and can contain any functional substances from the food, pharmaceutical, or cosmetic fields, including at least one selected from vegetable oils, animal fats, plant extracts, proteins, vitamins, minerals, and microorganisms.

[0035] In a sixth aspect, the present invention provides a method for preparing the above-mentioned plant soft capsules, which includes one or more of the following steps (1)-(2): (1) The plant gum powder composition is mixed with water and then gelatinized to obtain a glue solution; (2) The contents of the soft capsule are compressed with the adhesive liquid and the contents are encapsulated with the capsule shell formed by the adhesive liquid.

[0036] In step (1) above, the gelatinization temperature is 90-120℃. The gelatinization time is 30-60 min.

[0037] In step (1) above, the mass ratio of the plant gum powder composition to water is 1:(1.2-1.7). Preferably, it is 1:(1.4-1.6).

[0038] In step (1) above, the air bubbles are removed after gelatinization to obtain the adhesive solution.

[0039] In step (2) above, the contents and the gel obtained in step (1) are compressed into capsules using a soft capsule machine.

[0040] In step (2) above, after pellet pressing, a drying step may also be included, wherein the drying is performed until the hardness of the pellets meets the requirements (preferably 50-70N) and pellet selection is performed.

[0041] In a seventh aspect, the present invention provides the use of the above-described plant gum powder composition, capsule shell, or plant soft capsule in the preparation of food, medicine, or cosmetics.

[0042] The food products mentioned include both regular food and health food.

[0043] The beneficial effects of this invention include at least the following: By optimizing the raw materials of the plant-based gum powder composition, this invention improves the properties of the gum solution and the performance of the resulting plant-based soft capsules. The plant-based soft capsules prepared using the plant-based gum powder composition of this invention exhibit significantly improved tensile strength and transparency of the capsule shell, providing an effective method for improving the quality of plant-based soft capsules. The preparation method of plant-based soft capsules provided by this invention is simple, efficient, and easy to scale up for production, and has good application value in the field of plant-based soft capsule preparation. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] Unless otherwise specified, all raw materials mentioned in the following examples are commercially available products; all process steps or preparation methods not mentioned in detail are process steps or preparation methods known to those skilled in the art.

[0046] The preparation method of the hydroxypropyl starch used in the following examples and comparative examples is as follows: Take 500g of starch in a four-necked flask, add 2000g of isopropanol and stir for 20min to form a suspension. Slowly add 125mL of approximately 3mol / L sodium hydroxide solution, and react at 35℃ for 30min. Then add 2000 ± 300g of propylene oxide dropwise, stirring at 500r / min at 45-50℃ for 2 hours until the addition is complete, and continue the reaction. Monitor the starch viscosity throughout the process. After the reaction is complete, neutralize with 1mol / L dilute hydrochloric acid to approximately pH 7, centrifuge at 4000r / min for 15min, discard the supernatant, add 1 / 2 the initial amount of isopropanol, stir, and centrifuge again. Wash three times, then wash three times with distilled water and centrifuge again. Finally, vacuum dry the hydroxypropyl starch at 60℃ and -0.09MPa to a moisture content of 5%-8%, pulverize and pass through a 100-mesh sieve to obtain hydroxypropyl starch. Hydroxypropyl starch of different viscosities was prepared by controlling the reaction time after the propylene oxide addition was completed.

[0047] The preparation methods of carrageenan used in the following examples and comparative examples are as follows: First, the red algae were washed, dried, and pulverized. The resulting crude carrageenan extract was obtained through hot water extraction and filtration to remove impurities. Then, a suitable amount of concentrated sulfuric acid was slowly added dropwise to the crude extract at 40-45℃ for 1 hour, followed by a 2-hour reaction. After the reaction, the mixture was cooled to room temperature and neutralized to pH 7-8 with 5%-10% sodium hydroxide solution. Next, a mixture of anhydrous ethanol and distilled water (3:1 volume ratio) was added, stirred, and centrifuged. This process was repeated three times. Then, a freshly prepared mixture of anhydrous ethanol and distilled water (4:1 volume ratio) was added, heated to 70℃, stirred, and centrifuged. This process was repeated three times. Finally, the mixture was vacuum dried at 55℃ and -0.09 MPa until the water content was below 10%. The carrageenan was then pulverized and passed through an 80-100 mesh sieve. Carrageenan with different sulfuric acid ester contents was prepared by controlling the amount of concentrated sulfuric acid added.

[0048] The viscosity of the hydroxypropyl starch used in the following examples was determined using a Brookfield RVT viscometer according to GB / T22427.7-2008 (the viscosity was determined by stirring and dissolving a 5% aqueous solution of hydroxypropyl starch in water at 92°C for 20 minutes); the sulfate content of carrageenan was determined according to GB 1886.169-2016.

[0049] Example 1 This embodiment provides a plant gum powder composition comprising the following components: 80 kg of hydroxypropyl starch, 25 kg of carrageenan, 20 kg of sorbitol, and 1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 300 mPa·s, and the sulfate content of the carrageenan is 30%.

[0050] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0051] The preparation method of the above-mentioned plant soft capsules includes the following steps: (1) Gelatinization of the plant gum powder composition: ① Add the plant gum powder composition and water to the gelling tank in proportion, stir for 30 minutes to ensure complete and uniform dispersion, and turn on the heater at the same time. ② Heat the glue solution to 95℃ for gelatinization. Start timing when the glue solution temperature reaches 95℃. The gelatinization time is 60 minutes. Vacuum for 3-4 minutes to remove bubbles. The vacuum degree is -0.05 MPa. ③ Pour the glue into an insulated container and keep the glue solution temperature at 85-95℃.

[0052] (2) Preparation of plant soft capsules: The contents and gelatinized gel are pressed into capsules using a soft capsule machine.

[0053] Example 2 This embodiment provides a plant gum powder composition comprising the following components: 80 kg of hydroxypropyl starch, 25 kg of carrageenan, 20 kg of glycerol, and 1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 200 mPa·s, and the sulfate content of the carrageenan is 30%.

[0054] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0055] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0056] Example 3 This embodiment provides a plant gum powder composition comprising the following components: 80 kg of hydroxypropyl starch, 25 kg of carrageenan, 20 kg of sorbitol, and 1 kg of sodium carbonate; wherein the viscosity of the hydroxypropyl starch is 400 mPa·s, and the sulfate content of the carrageenan is 30%.

[0057] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0058] The preparation method of the above-mentioned plant soft capsules includes the following steps: (1) Gelatinization of the plant gum powder composition: ① Add the plant gum powder composition and water to the gelling tank in proportion, stir for 30 minutes to ensure complete and uniform dispersion, and turn on the heater at the same time. ② Heat the glue solution to 120℃ for gelatinization. Start timing when the glue solution temperature reaches 120℃. The gelatinization time is 30 minutes. Vacuum for 3-4 minutes to remove bubbles. The vacuum degree is -0.05 MPa. ③ Pour the glue into an insulated container and keep the glue solution temperature at 85-95℃.

[0059] (2) Preparation of plant soft capsules: The contents and gelatinized gel are pressed into capsules using a soft capsule machine.

[0060] Example 4 This embodiment provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the sulfate content of carrageenan is 25%.

[0061] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0062] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0063] Example 5 This embodiment provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the sulfate content of carrageenan is 35%.

[0064] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0065] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0066] Example 6 This embodiment provides a plant gum powder composition comprising the following components: 80 kg of hydroxypropyl starch, 25 kg of carrageenan, 20 kg of sorbitol, and 0.1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 300 mPa·s, and the sulfate content of the carrageenan is 30%.

[0067] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0068] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0069] Example 7 This embodiment provides a plant gum powder composition comprising the following components: 80 kg of hydroxypropyl starch, 25 kg of carrageenan, 5 kg of sorbitol, and 1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 300 mPa·s, and the sulfate content of the carrageenan is 30%.

[0070] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0071] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0072] Example 8 This embodiment provides a plant gum powder composition comprising the following components: 60 kg of hydroxypropyl starch, 10 kg of carrageenan, 20 kg of sorbitol, and 1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 300 mPa·s, and the sulfate content of the carrageenan is 30%.

[0073] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0074] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0075] Example 9 This embodiment provides a plant gum powder composition comprising the following components: 100 kg of hydroxypropyl starch, 40 kg of carrageenan, 20 kg of sorbitol, and 1 kg of sodium chloride; wherein the viscosity of the hydroxypropyl starch is 300 mPa·s, and the sulfate content of the carrageenan is 30%.

[0076] This embodiment also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0077] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0078] Comparative Example 1 This comparative example provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the viscosity of the hydroxypropyl starch is 600 mPa·s.

[0079] This comparative example also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0080] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0081] Comparative Example 2 This comparative example provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the viscosity of the hydroxypropyl starch is 150 mPa·s.

[0082] This comparative example also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0083] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0084] Comparative Example 3 This comparative example provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the content of carrageenan sulfate is 15%.

[0085] This comparative example also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0086] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0087] Comparative Example 4 This comparative example provides a plant gum powder composition, which differs from the plant gum powder composition of Example 1 only in that the sulfate content of carrageenan is 40%.

[0088] This comparative example also provides a plant-based soft capsule comprising a capsule shell prepared using the above-described plant-based gum powder composition and contents.

[0089] The preparation method of the above-mentioned plant soft capsules is the same as that in Example 1.

[0090] Experimental Example This experimental example tests the performance of the plant gum powder compositions and plant soft capsules in the above embodiments and comparative examples.

[0091] 1. Transmittance Measurement A certain amount of plant gum powder (i.e., the plant gum powder composition in each example and comparative example) was weighed and prepared into an 8% by mass emulsion. The emulsion was left at room temperature for 2 hours. 50 mL of the emulsion was placed in a 100 mL beaker and heated in a water bath at 95-100°C. The mixture was stirred for 25 minutes while maintaining its original volume. After cooling to approximately 50°C, the emulsion was measured using a spectrophotometer, with distilled water as a reference (assuming 100% transmittance). The transmittance was measured at a wavelength of 360 nm using a 1 cm cuvette, with distilled water assuming 100% transmittance. The results were rounded to one decimal place.

[0092] 2. Tensile strength test Rubber sheets were prepared using the plant-based gum powder compositions of the above-described embodiments and comparative examples, respectively, and the preparation methods are as follows: (1) Take 100 parts of the plant gum powder composition, add 150 parts of pure water, gelatinize at 100℃ for 40 min, and degas under vacuum to obtain the gum solution.

[0093] (2) The adhesive solution is pressed using a soft capsule machine. The indoor temperature is 20-25℃ and the humidity is 30-50%. The temperature of the heating tape is controlled at 85-95℃, the temperature of the capsule box is controlled at 83-87℃, the spray is heated to 45±2℃, the rotation speed is controlled at 1.5-2.5rpm, the thickness of the adhesive sheet is 0.50~0.60mm, and the width of the adhesive sheet is controlled at 230-240mm.

[0094] (3) Cut the pressed rubber into a shape 10cm long and 5cm wide; place it on a tensile testing machine, set the rubber to stop testing after it breaks, and record its tensile strength (MPa) at the time of breakage. The result should be rounded to two decimal places.

[0095] The measurement results are shown in Table 1.

[0096] Table 1

[0097] As shown in Table 1, the results of Examples 1-9 indicate that when hydroxypropyl starch with a viscosity of 200-400 mPa·s and carrageenan with a sulfate content of 25%-35% are compounded, the tensile strength of the rubber sheet is higher than 0.25 MPa, and the light transmittance of the rubber solution is greater than 35%. The results of Comparative Example 1 show that when the viscosity of hydroxypropyl starch is 600 mPa·s, both the tensile strength of the rubber sheet and the light transmittance of the rubber solution decrease, by 0.17 MPa and 19.5%, respectively. The results of Comparative Example 2 show that when the viscosity of hydroxypropyl starch is 150 mPa·s, the tensile strength of the rubber sheet decreases significantly to 0.2 MPa. The results of Comparative Example 3 show that when the carrageenan sulfate content is 15%, the tensile strength of the rubber sheet decreases significantly to 0.15 MPa. The results of Comparative Example 4 show that when the carrageenan sulfate content is 40%, the tensile strength of the rubber solution decreases significantly to 0.11 MPa.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plant-based gum powder composition, characterized in that, The composition comprises hydroxypropyl starch and carrageenan; The viscosity of the hydroxypropyl starch is 200-400 mpa·s; the viscosity is measured by stirring and dissolving a 5% hydroxypropyl starch aqueous solution in water at 92°C for 20 minutes using a viscometer. The sulfate content of the carrageenan is 25%-35%.

2. The plant gum powder composition according to claim 1, characterized in that, In the composition, the mass ratio of hydroxypropyl starch to carrageenan is (6-10):(1-4).

3. The plant gum powder composition according to claim 1 or 2, characterized in that, The composition also includes a plasticizer; The plasticizer includes at least one selected from sorbitol, glycerin, propylene glycol, polyethylene glycol, mannitol, and xylitol.

4. The plant gum powder composition according to any one of claims 1 to 3, characterized in that, The composition also includes inorganic salts; The inorganic salt includes at least one selected from sodium chloride, sodium carbonate, sodium sulfate, sodium citrate, disodium hydrogen phosphate, sodium dihydrogen phosphate, potassium chloride, potassium carbonate, potassium citrate, potassium nitrate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, calcium chloride, and calcium carbonate.

5. The plant gum powder composition according to any one of claims 1 to 4, characterized in that, The ratio of hydroxypropyl starch, carrageenan, plasticizer and inorganic salt in the composition is (6-10):(1-4):(0.5-2):(0.01-0.1).

6. The plant gum powder composition according to any one of claims 1 to 5, characterized in that, The plant-based gum powder composition is used to prepare the capsule shell of plant-based soft capsules.

7. The use of the plant gum powder composition according to any one of claims 1 to 6 in the preparation of plant soft capsules or capsule shells.

8. A method for preparing plant-based soft capsules using the plant gum powder composition according to any one of claims 1 to 6, characterized in that, The method includes one or more of the following steps (1)-(2): (1) The plant gum powder composition is mixed with water and then gelatinized to obtain a glue solution; (2) The contents of the soft capsule are compressed with the adhesive solution, and the contents are encapsulated with the capsule shell formed by the adhesive solution; Preferably, the gelatinization temperature is 90-120℃; And / or, the gelatinization time is 30-60 min.

9. A soft capsule shell, characterized in that, It is prepared using the plant gum powder composition according to any one of claims 1 to 6.

10. A plant-based soft capsule, characterized in that, It comprises the capsule shell and contents as described in claim 9.

Images