Sugar-free coating and preparation method of sandwich product adopting sugar-free coating

Abstract

The invention discloses a sugar-free coating and a preparation method of a sandwich product adopting the sugar-free coating, and relates to the technical field of food processing.The candy preparation method comprises the steps that firstly, primary coating is conducted, pre-coating powder is added, rolling is conducted, the surfaces of pellet cores (including chocolate inner cores, grain balls, nuts or glutinous rice flour soft cores) are evenly coated with powder, and then the pellet cores are subjected to secondary coating; then adding the mixed slurry, uniformly rolling, scattering pre-coating powder, drying, and repeating the operation for a plurality of layers; coating for the second time, adding the mixed pulp, rolling, scattering maltitol powder, drying by using dehumidification cold air, and repeating for a plurality of layers; during third-time coating, adding the mixed slurry, uniformly rolling, starting air exhaust, drying by using dehumidification cold air, and repeating for a plurality of layers; in the fourth coating, syrup is added, the mixture is turned over uniformly, and air exhaust and drying are started; and finally, coloring the film, waxing, protecting light and airing to complete the preparation of the sugar-free coated candy.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and more specifically to a sugar-free coating and a method for preparing a sandwich product using the sugar-free coating. Background Art

[0002] In a variety of applications including coatings, glazes, and colorants, and in various industries including household goods, construction, paper products, consumer products, personal care products, and cosmetics, pigment-grade titanium dioxide (TiO2) is commonly used as a white pigment. Edible pigment-grade titanium dioxide is also commonly used to provide the desired white color or opacity in the underlying layer to brighten subsequent colored layers in various food and confectionery products, including white or colored coated confectionery products. Conventionally, titanium dioxide has been used in pan coating to provide an opaque and white substrate on which a colored layer of pan coating is applied. The opacity provided to the pre-coated titanium dioxide coating allows the colored layer applied thereon to exhibit a more true color. The only other white material with a similar level of light-shielding effect to titanium dioxide is heavy calcium carbonate. However, with the sensitive signal from EU countries regarding the addition of titanium dioxide in food, we need to respond in advance and use heavy calcium carbonate to replace titanium dioxide. For example, when a colored layer is applied on calcium carbonate, they do not exhibit the same true color as when the same colored layer is applied on a pre-coated material containing titanium dioxide. At this time, using calcium carbonate with a higher mesh number can achieve a similar effect.

[0003] Sandwich foods such as chewing gum, candies, and chocolates are usually wrapped in soft or hard coatings. The coating provides an opportunity for manufacturers to change product characteristics such as taste, appearance, and nutritional value. In recent years, there has been a focus on sugar-free foods. Additional efforts have been made in producing natural-colored coatings that have the same color and strength as coatings that usually include granulated sugar. The coating can be made from a variety of sugar-containing syrups or sugar-free syrups. The coating syrup can also contain other ingredients such as flavorings, sweeteners, binders, and pigments. Summary of the Invention

[0004] In view of the above, the present invention provides a sugar-free coating and a method for preparing a sandwich product using the sugar-free coating.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A sugar-free coating, comprising: a mixed slurry and a syrup;

[0007] Wherein, the mixed slurry includes a sugar substitute material, a biopolymer, heavy calcium carbonate, and water;

[0008] The syrup includes a sugar substitute material and water.

[0009] Preferably, the above-mentioned sugar-free coating further includes: a primer powder and a maltitol powder.

[0010] The primer powder components include: maltitol, arabic gum, sodium citrate, and sucrose fatty acid ester. (Purchased from Purecare).

[0011] Preferably, the mass ratio of the sugar substitute material, the bioadhesive, the heavy calcium carbonate, and water is 25-35 parts of the sugar substitute material, 5-20 parts of the bioadhesive, 5-20 parts of the heavy calcium carbonate, and 15-25 parts of water by weight.

[0012] Preferably, the mixed slurry is prepared by the following method:

[0013] (1) Mix the sugar substitute material and the bioadhesive evenly in powder form to obtain a mixed powder;

[0014] (2) Mix the heavy calcium carbonate and water evenly to obtain a white liquid;

[0015] (3) Add the mixed powder to the white liquid and boil until the density is 1.0-1.5, then cool to room temperature and set aside.

[0016] Preferably, the density of the syrup is 1.0-1.5.

[0017] The beneficial effects brought by the above preference include: the density of the syrup is 1.0-1.5, which can accelerate the crystallization speed of the syrup. If the density is too high, the surface of the sugar pill will be rough; if the density is too low, the adhesiveness will be insufficient.

[0018] Preferably, the particle size of the heavy calcium carbonate is 1000-1400 mesh.

[0019] The beneficial effects brought by the above preference include: both the particle size of the heavy calcium carbonate being 1000-1400 mesh and titanium dioxide are insoluble in the liquid and can only be evenly distributed in the liquid; titanium dioxide is relatively fine, which is beneficial to the uniform adhesion of the syrup. The heavy calcium carbonate with a low mesh number is relatively rough and is not conducive to the uniform adhesion of the syrup. The higher the mesh number of the calcium carbonate, the closer the effect is to that of titanium dioxide.

[0020] Preferably, the sugar substitute material includes one or more of maltitol and xylitol.

[0021] The beneficial effects brought by the above preference include: Currently, the white sugar coating technology is widely used and the technology is mature, but there is no precedent in the current market to completely use sugar substitutes and not use white sugar coating during the production process.

[0022] Preferably, the bioadhesive includes one or more of arabic gum and xanthan gum.

[0023] The beneficial effects brought by the above optimizations include: adding one or more of gum arabic and xanthan gum to form a protective shell with other components during the coating process to prevent other oils from separating out.

[0024] Another object of the present invention is to provide a method for preparing a sandwich product with sugar-free coating, comprising the following steps:

[0025] S1. First coating:

[0026] Before the coating starts, first add the pre-coated powder and start rotating for 6 - 8 minutes to evenly coat a thin layer of powder on the surface of the pill cores. Then add the mixed slurry, roll evenly and then sprinkle the pre-coated powder again. After rolling evenly, first turn on the exhaust for drying for 30 - 40 minutes. Repeat the operation and repeat coating several layers as needed.

[0027] S2. Second coating:

[0028] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 1 - 2 minutes. After rolling evenly, sprinkle maltitol powder and roll for 1 - 2 minutes, then dry with dehumidifying cold air for 20 - 30 minutes. Repeat the above steps and repeat coating several layers as needed.

[0029] S3. Third coating:

[0030] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 1 - 2 minutes. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air for 20 - 30 minutes. Repeat coating several layers as needed.

[0031] S4. Fourth coating:

[0032] After the pill cores are completely dried, turn off the exhaust, add the syrup and roll for 1 - 2 minutes. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air.

[0033] S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection and sheet drying.

[0034] As can be seen from the above technical solutions, compared with the prior art, the present invention has the following beneficial effects:

[0035] All coating layers use sugar substitutes, which conforms to the current general trend of great health. And replacing titanium dioxide with heavy calcium carbonate of 1000 - 1400 mesh enriches the product diversity, and the addition of colloid during the coating process can also form a protective shell with other components to prevent oil from separating out. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0037] Figure 1 It is a photo of the sample state during the coating process.

[0038] Figure 2 It is a photo of the sample with a syrup concentration of 1.8 during the coating process.

[0039] Figure 3 It is a photo of the sample with a syrup concentration of 1.0 - 1.5 during the coating process. Detailed implementation manners

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] Embodiment 1

[0042] This embodiment provides a sugar-free coating, including: mixed slurry, syrup, and pre-coated powder;

[0043] Among them, the mixed slurry is prepared by the following method:

[0044] (1) Mix 25 parts of maltitol and 20 parts of arabic gum evenly in powder state to obtain a mixed powder;

[0045] (2) Mix 5 parts of 1200-mesh heavy calcium carbonate and water by weight, 5 parts of heavy calcium carbonate and 15 parts of water, and mix evenly to obtain a white liquid;

[0046] (3) Add the mixed powder to the white liquid and boil until the density is 1.5, then cool to room temperature to obtain the mixed slurry for standby.

[0047] The syrup is obtained by boiling maltitol powder and water until the density is 1.5.

[0048] The pre-coated powder is purchased from Prucon, and its ingredients include: maltitol, arabic gum, sodium citrate, and sucrose fatty acid ester.

[0049] A preparation method of a sandwich product using the sugar-free coating includes the following steps:

[0050] S1. First coating:

[0051] Before the film coating starts, first add the pre-coated powder and start rotating for 8 minutes to evenly coat the surface of the pill cores (chocolates) with a thin layer of powder. Then add the mixed slurry, roll evenly and then sprinkle the pre-coated powder again. After rolling evenly, first turn on the exhaust for drying for 40 minutes. Repeat the operation and repeat coating several layers as needed;

[0052] S2. Second coating:

[0053] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, sprinkle the maltitol powder and roll for 2 minutes, and then dry with dehumidified cold air for 30 minutes. Repeat the above steps and repeat coating several layers as needed;

[0054] S3. Third coating:

[0055] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, first turn on the exhaust and then dry with dehumidified cold air for 30 minutes. Repeat coating several layers as needed;

[0056] S4. Fourth coating:

[0057] After the pill cores are completely dried, turn off the exhaust, add the syrup and roll for 2 minutes. After rolling evenly, first turn on the exhaust and then dry with dehumidified cold air;

[0058] S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection and sheet airing.

[0059] Example 2

[0060] This example provides a sugar-free coating, including: mixed slurry, syrup and pre-coated powder;

[0061] Among them, the mixed slurry is prepared by the following method:

[0062] (1) Mix 30 parts of xylitol and 15 parts of arabic gum evenly in powder state to obtain a mixed powder;

[0063] (2) Mix 10 parts of 1400-mesh heavy calcium carbonate and 20 parts of water by weight to obtain a white liquid;

[0064] (3) Add the mixed powder to the white liquid and boil until the density is 1.0, and cool to room temperature to obtain the mixed slurry for standby.

[0065] The syrup is obtained by boiling maltitol powder and water until the density is 1.0.

[0066] A preparation method of a sandwich product using a sugar-free coating includes the following steps:

[0067] S1. First coating:

[0068] Before the coating starts, first add the pre - coating powder, start rotation for 6 minutes to evenly coat a thin layer of powder on the surface of the pill cores (chocolates), then add the mixed slurry, roll evenly, then sprinkle the pre - coating powder again, and after rolling evenly, first turn on the exhaust for drying for 30 minutes. Repeat the operation and repeat coating several layers as needed;

[0069] S2. Second coating:

[0070] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 1 minute, roll evenly, then sprinkle maltitol powder and roll for 1 minute, and dry with dehumidifying cold air for 200 minutes. Repeat the above steps and repeat coating several layers as needed;

[0071] S3. Third coating:

[0072] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 1 minute, roll evenly, then first turn on the exhaust, and then dry with dehumidifying cold air for 20 minutes. Repeat coating several layers as needed;

[0073] S4. Fourth coating:

[0074] After the pill cores are completely dried, turn off the exhaust, add the syrup and roll for 1 minute, roll evenly, then first turn on the exhaust, and then dry with dehumidifying cold air;

[0075] S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection and sheet drying.

[0076] Example 3

[0077] This example provides a sugar - free coating, including: mixed slurry, syrup and pre - coating powder;

[0078] Among them, the mixed slurry is prepared by the following method:

[0079] (1) Mix 15 parts of xylitol, 20 parts of maltitol and 20 parts of xanthan gum evenly in powder state to obtain a mixed powder;

[0080] (2) Mix 20 parts of 1400 - mesh heavy calcium carbonate and 25 parts of water by weight to obtain a white liquid;

[0081] (3) Add the mixed powder to the white liquid and boil until the density is 1.2, then cool to room temperature to obtain the mixed slurry for standby.

[0082] The syrup is obtained by boiling maltitol powder and water until the density is 1.2.

[0083] A preparation method of a sandwich product using a sugar - free coating includes the following steps:

[0084] S1. First coating:

[0085] Before the coating starts, first add the pre - coating powder, start rotating for 7 minutes to evenly coat the surface of the pill cores (chocolates) with a thin layer of powder, then add the mixed slurry, roll evenly and then sprinkle the pre - coating powder again. After rolling evenly, first turn on the exhaust for drying for 35 minutes, repeat the operation, and repeat coating several layers as needed;

[0086] S2. Second coating:

[0087] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, sprinkle the maltitol powder and roll for 1 minute, then dry with dehumidifying cold air for 25 minutes. Repeat the above steps and repeat coating several layers as needed;

[0088] S3. Third coating:

[0089] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air for 25 minutes. Repeat coating several layers as needed;

[0090] S4. Fourth coating:

[0091] After the pill cores are completely dried, turn off the exhaust, add the syrup and roll for 1 minute. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air;

[0092] S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection and sheet drying.

[0093] Example 4

[0094] This example provides a sugar - free coating, including: mixed slurry, syrup and pre - coating powder;

[0095] Among them, the mixed slurry is prepared by the following method:

[0096] (1) Mix 25 parts of maltitol and 20 parts of arabic gum evenly in powder state to obtain a mixed powder;

[0097] (2) Mix 5 parts of 1200 - mesh heavy calcium carbonate and 15 parts of water by weight to obtain a white liquid;

[0098] (3) Add the mixed powder to the white liquid and boil until the density is 1.6, then cool to room temperature to obtain the mixed slurry for standby.

[0099] The syrup is obtained by boiling maltitol powder and water until the density is 1.8.

[0100] The pre-coated powder was purchased from Pruikang, and its ingredients include: maltitol, gum arabic, sodium citrate, and sucrose fatty acid ester.

[0101] A method for preparing a sandwich product with sugar-free coating includes the following steps:

[0102] S1. First coating:

[0103] Before the coating starts, first add the pre-coated powder, start rotating for 8 minutes to evenly coat the surface of the pill cores (chocolates) with a thin layer of powder, then add the mixed slurry, roll evenly and then sprinkle the pre-coated powder again. After rolling evenly, first turn on the exhaust for drying for 40 minutes, and repeat the operation. Repeat coating several layers as needed;

[0104] S2. Second coating:

[0105] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, sprinkle maltitol powder and roll for 2 minutes, then dry with dehumidifying cold air for 30 minutes. Repeat the above steps and repeat coating several layers as needed;

[0106] S3. Third coating:

[0107] After the pill cores are completely dried, turn off the exhaust, add the mixed slurry and roll for 2 minutes. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air for 30 minutes. Repeat coating several layers as needed;

[0108] S4. Fourth coating:

[0109] After the pill cores are completely dried, turn off the exhaust, add the syrup and roll for 2 minutes. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air;

[0110] S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection, and sheet airing.

[0111] Comparative Example 1

[0112] This comparative example provides a method for preparing a sandwich product with sugar-free coating. Compared with Example 1, no gum arabic or xanthan gum is added during the preparation of the mixed slurry.

[0113] Comparative Example 2

[0114] This comparative example provides a method for preparing a sandwich product with sugar-free coating. Compared with Example 1, no pre-coated powder is used during the coating process.

[0115] Effect verification:

[0116] 1. Sensory evaluation

[0117] Using the sugar confectionery products prepared in each example and comparative example as samples, the subjects scored them in terms of taste. The evaluation method was to take an appropriate amount of the sample and place it on a clean and dry white porcelain plate, observe the color and state under natural light, smell its odor, rinse the mouth with warm boiled water, and taste the flavor. The experimental results are shown in Table 1.

[0118] Table 1 Sensory Evaluation Criteria

[0119] Item Requirement Full marks Color and luster Conform to the color and luster that the product should have, with bright luster and no dullness 20 Appearance Smooth and round, not rough, without abnormal-shaped tablets 20 Taste and smell Have the flavor of sugar pills that the product should have, without off-flavors 50 Impurities No foreign impurities visible to the naked eye 10 Texture The surface is tight and delicate, without pores larger than 1 mm 10

[0120] Table 2 Sensory Evaluation Results

[0121]

[0122]

[0123] Comparing each example with the comparative examples, it can be seen that the sensory evaluation scores of the sugar confectionery products prepared by the methods of Example 1 and Example 2 are significantly higher than those of Comparative Example 1 and Comparative Example 2. This shows that adding either gum arabic or xanthan gum can improve the sensory properties of the product. Without adding the precoating powder, the coating effect of the sugar pills will be affected, resulting in unevenness in appearance. The syrup density of Example 4 is 1.8, which is more viscous and has worse fluidity compared to Example 1, Example 2, and Example 3, and it will cause uneven coating, as Figure 2 shown, while the sugar pills with a syrup density of 1.0 - 1.5 have a smooth surface as Figure 3 shown.

[0124] 2. Texture Detection of Sugar Pill Samples

[0125] Using a texture analyzer from TA company and the TPA method to measure the texture of the chocolate beans prepared in Examples 1 - 4 and commercially available high-quality chocolates. The specific operating conditions are as follows: using a P200 probe, the test rate is 0.6 mm / s, the rates before and after the test are both 1.2 mm / s, the compression ratio is 55%, the dwell time is 5 s, the data acquisition rate is 200 pps, the trigger value is 0.05 N, and the measurement is repeated 3 times. The measurement results are shown in Table 3.

[0126] Table 3 Texture Test Results

[0127]

[0128] Comparing each example with the commercially available chocolate bean samples, it can be seen that the texture indexes of the samples in Examples 1 - 4 are better than those of the commercially available products, and when the syrup density is changed to 1.8, all indexes decrease. The sugar pills prepared by the coating method of the present invention are better than the chocolate bean products on the market.

[0129] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0130] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sugar-free coating, characterized in that, Comprising: Mixed pulp and syrup; Wherein, the mixed pulp comprises a sugar substitute material, a bio - glue, heavy calcium carbonate and water; The syrup comprises a sugar substitute material and water.

2. The sugar-free coating according to claim 1, wherein Also comprising: Pre - coating powder and maltitol powder.

3. The sugar-free coating according to claim 2, wherein, The sugar substitute material, bio - glue, heavy calcium carbonate and water are, by weight parts, 25 - 35 parts of sugar substitute material, 5 - 20 parts of bio - glue, 5 - 20 parts of heavy calcium carbonate, and 15 - 25 parts of water.

4. A sugar-free coating according to claim 3, wherein The mixed pulp is prepared by the following method: (1) Mix the sugar substitute material and bio - glue evenly in powder state to obtain a mixed powder; (2) Mix heavy calcium carbonate and water evenly to obtain a white liquid; (3) Add the mixed powder into the white liquid and boil until the density is 1.0 - 1.5, then cool to room temperature for standby.

5. A sugar-free coating according to claim 2, characterized in that, The density of the syrup is 1.0 - 1.

5.

6. A sugar-free coating according to claim 2, wherein The particle size of the heavy calcium carbonate is 1000 - 1400 mesh.

7. A sugar-free coating according to claim 2, wherein, The sugar substitute material comprises one or more of maltitol and xylitol.

8. An unsweetened coating according to claim 2, characterized in that, The bio - glue comprises one or more of arabic gum and xanthan gum.

9. A method for preparing a sandwich product with sugar-free coating, characterized in that, Comprising the following steps: S1. First coating: Before the coating starts, first add the pre - coating powder, start rotation for 6 - 8 min to evenly coat a thin layer of powder on the surface of the pill core, then add the mixed pulp, roll evenly and then sprinkle the pre - coating powder again. After rolling evenly, first turn on the exhaust for drying for 30 - 40 min, repeat the operation, and repeat coating several layers as needed; S2. Second coating: After the pill core is completely dried, turn off the exhaust, add the mixed pulp and roll for 1 - 2 min. After rolling evenly, sprinkle the maltitol powder and roll for 1 - 2 min, then dry with dehumidifying cold air for 20 - 30 min. Repeat the above steps and repeat coating several layers as needed; S3. Third coating: After the pill core is completely dried, turn off the exhaust, add the mixed pulp and roll for 1 - 2 min. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air for 20 - 30 min. Repeat coating several layers as needed; S4. Fourth coating: After the pill core is completely dried, turn off the exhaust, add the syrup and roll for 1 - 2 min. After rolling evenly, first turn on the exhaust, and then dry with dehumidifying cold air; S5. After the coating is completed, the candies are obtained through film coloring, waxing, light protection and sheet airing.

10. A method for preparing a sandwich product with sugar-free coating according to claim 9, characterized in that, The pill core comprises any one of a chocolate inner core, cereal balls, nuts, and glutinous rice flour soft cores.

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