Sponge integrated soap and preparation method thereof

Abstract

The invention relates to a sponge integrated soap, which comprises soap particles and a sponge, the soap particles are distributed in the sponge, and the soap particles comprise the following components: a coconut oil soap base and a hardening agent used for limiting the movement of the soap particles in sponge pores, the hardener includes sodium alginate providing negatively charged macromolecular chains and a calcium salt for bridging adjacent sodium alginate macromolecular chains. After the scheme is adopted, the prepared sponge integrated soap can be in direct contact with skin, soap particles are uniformly distributed in the sponge, and liquid soap can uniformly flow to each use surface of the sponge after meeting water, so that the cleaning effect is remarkably improved, in addition, the used liquid soap or soap foam cannot flow back into the sponge, and the cleaning effect is improved. And the sanitation and durability of the product are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of soap manufacturing, in particular to a sponge-in-one soap and a preparation method thereof. Background Art

[0002] In the traditional cleaning process, soap and sponge are usually used separately to complete the cleaning task. This separate use method not only consumes time and energy, but is also inconvenient in storage and carrying. Therefore, there are products on the market that combine sponge and soap. Such products generally embed the soap into a sponge with a groove or a receiving cavity, or embed the sponge into the soap.

[0003] The utility model patent with application number 201920605750.X discloses an easy-to-clean sponge, which has a downward-facing groove on the bottom of the sponge body, and soap or perfumed soap is placed in the groove. This solution prevents people from directly contacting the soap or perfumed soap when using it, thereby improving the hygiene and feel of the hands.

[0004] However, this method of embedding soap inside the sponge will affect the dissolution rate of the soap. This is because after the soap is embedded in the sponge, the effective contact area between the soap and water is reduced, making the soap dissolution process slow and insufficient. This may easily lead to the inability of soap molecules to be evenly and fully released to the sponge surface during the cleaning process, thereby affecting the overall cleaning efficiency and uniformity. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sponge-in-one soap and a preparation method thereof. The prepared sponge-in-one soap can directly contact the skin, and the soap particles are evenly distributed in the sponge, ensuring that after encountering water, the soap liquid can also flow evenly to each use surface of the sponge, thereby significantly improving the cleaning effect. In addition, the used soap liquid or soap foam will not flow back into the sponge, thereby ensuring the hygiene and durability of the product.

[0006] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] A sponge-in-one soap comprises soap particles and a sponge. The soap particles are distributed in the sponge. The soap particles comprise the following components: a coconut oil soap base and a hardener for limiting the movement of the soap particles in the pores of the sponge. The hardener comprises sodium alginate providing a macromolecular chain with a negative charge and a calcium salt for bridging adjacent sodium alginate macromolecular chains.

[0008] The sponge-in-one soap has a sponge as a base, which is looser and more porous than ordinary soap. Therefore, when used, water and soap particles in the sponge are in more sufficient contact, which requires that the soap particles themselves have weaker solubility than ordinary soap, but cannot be too hard to avoid the sponge soap from being difficult to release soap liquid after contacting water. In the present invention, coconut oil soap base, sodium alginate and calcium salt are mixed and prepared into soap liquid, and then the soap liquid is absorbed into the pores of the sponge to form a sponge with soap particles.

[0009] Commonly used raw materials for decontamination soap bases include olive oil soap base, coconut oil soap base and palm oil soap base: Olive oil is rich in oleic acid, which is a monounsaturated fatty acid. It gives olive oil soap a softer texture, but soap particles that are too soft are not conducive to the solidification and molding of sponge-in-one soap. During solidification, the soap particles will concentrate downward, which is not conducive to the uniform distribution of soap particles in the sponge. Although palm oil soap base is harder, its solubility is poor. Therefore, only coconut oil soap base with moderate hardness and good solubility is more suitable for use in sponge-in-one soap.

[0010] First, after sodium alginate is dissolved in water, it forms negatively charged macromolecular chains, which are linearly distributed in the water, making the soap liquid viscous. Secondly, the calcium ions in the added calcium salt can form a stable complex with the carboxyl groups in the sodium alginate molecules, thereby bridging and cross-linking adjacent sodium alginate macromolecular chains to form a three-dimensional gel network structure. This network structure can fix the water molecules and soap particles in the soap liquid inside it, reducing the degrees of freedom between molecules. Then, as the water in the soap liquid evaporates, the soap liquid solidifies into a solid form, in which the soap particles are fixed by the gel network and cannot move freely. Finally, this gel network structure can fill the pores of the sponge and maintain the shape and structure of the sponge during the solidification process of the soap liquid.

[0011] Preferably, the soap particles also include a dispersant for reducing the surface tension of the soap solution and increasing the fluidity of the soap solution, and the dispersant is glycerol. The glycerol molecule contains three hydroxyl groups (-OH), and these hydroxyl groups can form hydrogen bonds with water molecules, interfering with the hydrogen bond network between water molecules, thereby reducing the surface tension, and the surface tension reduction makes it easier for the soap solution to be spread and flow in the sponge pores when the sponge absorbs the soap solution. In the preparation process of the sponge absorbing the soap solution, the presence of glycerol molecules improves the fluidity of the soap solution, making the soap solution easier to be evenly distributed in the sponge pores, and the glycerol molecules also help calcium ions to diffuse more quickly into the sodium alginate molecules, increasing the chance of calcium ions contacting the carboxyl groups on the sodium alginate macromolecular chain, thereby improving the efficiency of cross-linking, and promoting the formation of a stable gel network structure. Therefore, in the preparation process of the sponge integrated soap, glycerol can make the soap particles evenly distributed inside the sponge, ensuring the effective use of the soap, avoiding the local concentration of the components when the soap is dissolved, causing waste and affecting the cleaning effect. It is worth noting that dispersants suitable for dispersing soap particles can also be propylene glycol and polyethylene glycol, but because glycerin has good moisturizing properties, and a certain humidity needs to be maintained during the curing process of the sponge soap to ensure the uniform distribution of soap particles and the diffusion of calcium ions, glycerin with good moisturizing properties is preferred as the dispersant.

[0012] Preferably, the calcium salt is calcium chloride. Calcium chloride can provide calcium ions, which interact with the carboxyl groups in the sodium alginate molecules to form a bridging structure, thereby connecting the sodium alginate molecules together to form a stable gel structure, which helps to limit the movement of soap particles in the sponge pores and ensure that the soap particles are stably retained in the sponge during the curing process. Calcium chloride has better solubility than other calcium salts (such as calcium carbonate and calcium sulfate), so it is easier to provide calcium ions to promote the cross-linking reaction with the sodium alginate molecules, accelerate the formation of the gel network structure, and avoid the loss of soap particles.

[0013] Preferably, a preservative is also included, and the preservative is vitamin E. The antioxidant effect of vitamin E helps to maintain the stability of soap particles and prevent them from deteriorating due to oxidation. It can also inhibit the growth of microorganisms, so that the soap has a certain antiseptic effect. It is worth noting that vitamin E can also moisturize the skin and delay skin aging.

[0014] Preferably, the sponge includes a soap storage layer, a transition layer and a quick-drying layer arranged in sequence from top to bottom, and the soap storage layer, the transition layer and the quick-drying layer all have a pore structure, the pores of the soap storage layer are smaller than the pores of the transition layer, and the pores of the transition layer are smaller than the pores of the quick-drying layer. The small pores of the soap storage layer help to limit the movement of soap particles in the pores of the sponge, and the three-dimensional gel network structure formed by the hardener enables the sponge of this layer to store more soap particles and ensure that the soap liquid will not be lost quickly during the curing process; the pores of the quick-drying layer are relatively large, which helps the soap liquid to be quickly discharged and dried after use, reduces residual moisture, prolongs the service life of the product, and ensures the hygiene of the product; the pores of the transition layer are moderate, which helps to control the release rate of the soap liquid during use, ensures that the soap liquid can be evenly released during use, and also avoids the soap liquid in the soap storage layer from directly penetrating into the quick-drying layer during curing and losing quickly. The functions of each layer of the sponge are distinct, which improves the practicality of the product.

[0015] Preferably, the soap storage layer is made of water-absorbing resin, and the transition layer and quick-drying layer are both made of polyurethane foam. The water-absorbing resin has strong water absorption and water retention capacity, can effectively absorb and store soap liquid, ensure that the soap liquid will not be lost quickly during curing or use, and also help the soap liquid to be continuously released during use, thereby improving the durability and storage capacity of the soap liquid. The polyurethane foam also has good water absorption capacity and air permeability, which helps the soap liquid to discharge water smoothly when curing in the sponge, accelerates the curing process, and the polyurethane foam has good structural stability, which helps to maintain the shape and structural stability of the sponge.

[0016] Preferably, a hydrophobic layer is also included, the hydrophobic layer includes polyester fiber and a hydrophobic coating, the hydrophobic coating is evenly coated on the polyester fiber, the hydrophobic coating is made of polydimethylsiloxane, and the hydrophobic layer is arranged between the transition layer and the quick-drying layer. The hydrophobic layer can effectively prevent the soap liquid or soap foam from being sucked back into the sponge during use, especially when the soap liquid has been used up or there are more soap foams during use, which effectively improves the sanitation of the product; the hydrophobic layer also helps to control the distribution range of the soap liquid, ensuring that the soap liquid is mainly concentrated in the soap storage layer and the transition layer, rather than penetrating into the quick-drying layer, especially in the curing stage, effectively avoiding the loss of the soap liquid; it is worth noting that during use, the hydrophobic layer will make the soap bubbles float on the surface of the quick-drying layer, and these used soap bubbles or soap liquids can be rinsed off with clean water, further ensuring the sanitation of the product. Moreover, the polyester fiber itself has a certain hydrophobicity, and is also suitable as the base material of the hydrophobic layer. At the same time, it has good tensile strength and toughness, which can effectively improve the mechanical properties of the sponge as a whole.

[0017] Preferably, a hydrophilic layer is also included, wherein the hydrophilic layer is a hydrophilic coating made of polyvinyl alcohol, and the hydrophilic coating is arranged between the hydrophobic layer and the transition layer, one side of the hydrophilic layer is fixedly connected to one side of the hydrophobic layer, the hydrophilic layer faces the transition layer, and the hydrophobic layer faces the quick-drying layer. The presence of the hydrophilic layer helps to ensure the effective transmission of soap liquid from the soap storage layer to the transition layer during use. During use, after the soap liquid passes through the hydrophilic layer, it continues to flow at the interface between the hydrophilic layer and the hydrophobic layer. During this period, the capillary action of the sponge itself can achieve that the soap liquid reaches the quick-drying layer with larger pores and flows out, so as to avoid the accumulation of soap liquid at the hydrophilic layer, and secondly, the quick-drying layer can also have soap liquid or soap foam when in use, thereby improving the coverage and use efficiency of the soap liquid.

[0018] The hydrophobic coating is made of polydimethylsiloxane and the hydrophilic coating is made of polyvinyl alcohol. This is because polydimethylsiloxane has good hydrophobicity and polyvinyl alcohol has good hydrophilicity. At the same time, polydimethylsiloxane and polyvinyl alcohol are both harmless to the human body. In addition, since both polydimethylsiloxane and polyvinyl alcohol have long molecular chains, they have good flexibility and are very suitable for use in products such as sponges that often need to undergo extrusion and deformation.

[0019] The present invention also provides a method for preparing a sponge-in-one soap, the steps of which are as follows:

[0020] S1: Cut the coconut soap base into small pieces, and then heat it to completely melt it into a liquid state;

[0021] S2: adding a hardener, a dispersant and a preservative to the liquid coconut oil soap base in sequence, and then stirring the mixture to form a soap liquid;

[0022] S3: compress the sponge and soak it in soap solution, so that the sponge will naturally rebound to its original shape in the soap solution;

[0023] S4: Take out the sponge soaked with soap solution and let it dry naturally.

[0024] The preparation method can be used to evenly distribute soap particles in the sponge, and the soap liquid is solidified in the sponge by a hardener, thereby making a sponge-in-one soap; it is worth noting that both the soap and the sponge use ingredients that are harmless to the human body and will not cause skin irritation or allergic reactions, and the prepared sponge-in-one soap has good safety; at the same time, the integrity of the sponge is not destroyed, so that the sponge still retains its original water absorption capacity and elasticity, further ensuring its ability to evenly absorb soap liquid.

[0025] In step S4, the quick-drying layer of the sponge needs to be placed upward during the curing process. In this way, the loss of soap liquid during the curing process can be reduced, and the soap liquid can be retained in the soap storage layer with smaller pores. At the same time, the water can be evaporated faster, accelerating the curing process of the soap liquid.

[0026] In this way, the present invention provides a sponge-in-one soap and a preparation method thereof, and the prepared sponge-in-one soap can directly contact the skin, so that the soap particles are evenly distributed in the sponge, ensuring that after contacting water, the soap liquid can also flow evenly to each use surface of the sponge, thereby significantly improving the cleaning effect. In addition, the used soap liquid or soap foam will not flow back into the sponge, ensuring the hygiene and durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 It is a structural schematic diagram of the sponge in the sponge-in-one soap and the preparation method thereof.

[0029] in,

[0030] 1-sponge; 2-soap storage layer; 3-transition layer; 4-quick-drying layer; 5-hydrophobic layer; 51-polyester fiber; 52-hydrophobic coating; 6-hydrophilic layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the description of the present invention, it is necessary to understand that the directions and positional relationships indicated by “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “bottom”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] A sponge-in-one soap comprises soap particles and a sponge 1, wherein the soap particles are distributed in the sponge 1, and the soap particles comprise the following components: a coconut oil soap base and a hardener for limiting the movement of the soap particles in the pores of the sponge 1, wherein the hardener comprises sodium alginate providing a macromolecular chain with a negative charge and a calcium salt for bridging adjacent sodium alginate macromolecular chains.

[0034] The sponge-in-one soap has a sponge 1 as a base, which is looser and more porous than ordinary soap. Therefore, when in use, water and soap particles in the sponge 1 are in more sufficient contact, which requires that the soap particles themselves have weaker solubility than ordinary soap, but cannot be too hard to avoid the sponge 1 soap from being difficult to release soap liquid after contacting water. In the present invention, coconut oil soap base, sodium alginate and calcium salt are mixed and prepared into soap liquid, and then the soap liquid is absorbed into the pores of the sponge 1 to form a sponge 1 with soap particles.

[0035] Commonly used decontamination soap base raw materials include olive oil soap base, coconut oil soap base and palm oil soap base: Olive oil is rich in oleic acid, which is a monounsaturated fatty acid, which gives olive oil soap a softer texture, but too soft soap particles are not conducive to the solidification and molding of sponge-in-one soap. During solidification, the soap particles will concentrate downward, which is not conducive to the uniform distribution of soap particles in the sponge 1. Although palm oil soap base is harder, its solubility is poor. Therefore, only coconut oil soap base with moderate hardness and good solubility is more suitable for use in sponge-in-one soap.

[0036] First, after sodium alginate is dissolved in water, it forms negatively charged macromolecular chains, which are linearly distributed in water, making the soap liquid viscous. Secondly, the calcium ions in the added calcium salt can form a stable complex with the carboxyl groups in the sodium alginate molecules, thereby promoting the bridging and cross-linking of adjacent sodium alginate macromolecular chains to form a three-dimensional gel network structure. This network structure can fix the water molecules and soap particles in the soap liquid inside it, reducing the degree of freedom between molecules. Then, as the water in the soap liquid evaporates, the soap liquid solidifies into a solid form, in which the soap particles are fixed by the gel network and cannot move freely. Finally, this gel network structure can fill the pores of sponge 1 and maintain the shape and structure of sponge 1 during the curing process of the soap liquid.

[0037] Further, the soap particles also include a dispersant for reducing the surface tension of the soap solution and increasing the fluidity of the soap solution, and the dispersant is glycerol. The glycerol molecule contains three hydroxyl groups (-OH), which can form hydrogen bonds with water molecules, interfere with the hydrogen bond network between water molecules, thereby reducing the surface tension, and the surface tension reduction makes it easier for the soap solution to unfold and flow in the pores of the sponge 1 when the sponge 1 absorbs the soap solution. In the preparation process of the sponge 1 absorbing the soap solution, the presence of glycerol molecules improves the fluidity of the soap solution, making the soap solution easier to be evenly distributed in the pores of the sponge 1, and the glycerol molecules also help calcium ions to diffuse more quickly into the sodium alginate molecules, increasing the chance of calcium ions contacting the carboxyl groups on the sodium alginate macromolecular chain, thereby improving the efficiency of cross-linking and promoting the formation of a stable gel network structure. Therefore, in the preparation process of the sponge-in-one soap, glycerol can make the soap particles evenly distributed inside the sponge 1, ensuring the effective use of the soap, avoiding the local concentration of the components when the soap is dissolved, causing waste and affecting the cleaning effect.

[0038] It is worth noting that dispersants suitable for dispersing soap particles can also be propylene glycol and polyethylene glycol, but because glycerin has good moisturizing properties, and a certain humidity needs to be maintained during the curing process of the sponge soap to ensure the uniform distribution of soap particles and the diffusion of calcium ions, glycerin with good moisturizing properties is preferred as the dispersant.

[0039] Further, the calcium salt is calcium chloride. Calcium chloride can provide calcium ions, which interact with the carboxyl groups in the sodium alginate molecules to form a bridging structure, thereby connecting the sodium alginate molecules together to form a stable gel structure, which helps to limit the movement of soap particles in the pores of the sponge 1 and ensure that the soap particles are stably retained in the sponge 1 during the curing process. Calcium chloride has better solubility than other calcium salts (such as calcium carbonate and calcium sulfate), so it is easier to provide calcium ions to promote the cross-linking reaction with the sodium alginate molecules, accelerate the formation of the gel network structure, and avoid the loss of soap particles.

[0040] Furthermore, the soap also includes a preservative, which is vitamin E. The antioxidant effect of vitamin E helps to maintain the stability of soap particles and prevent them from deteriorating due to oxidation. In addition, vitamin E can inhibit the growth of microorganisms, so that the soap has a certain antiseptic effect.

[0041] It is worth noting that vitamin E can also moisturize the skin and delay skin aging.

[0042] Further, the sponge 1 includes a soap storage layer 2, a transition layer 3 and a quick-drying layer 4 arranged in sequence from top to bottom, and the soap storage layer 2, the transition layer 3 and the quick-drying layer 4 all have a pore structure, the pores of the soap storage layer 2 are smaller than the pores of the transition layer 3, and the pores of the transition layer 3 are smaller than the pores of the quick-drying layer 4. The small pores of the soap storage layer 2 help to limit the movement of soap particles in the pores of the sponge 1, and the three-dimensional gel network structure formed by the hardener enables the sponge 1 of this layer to store more soap particles and ensure that the soap liquid will not be lost quickly during the curing process; the pores of the quick-drying layer 4 are relatively large, which helps the soap liquid to be quickly discharged and dried after use, reduces residual moisture, prolongs the service life of the product, and ensures the hygiene of the product; the pores of the transition layer 3 are moderate, which helps to control the release rate of the soap liquid during use, ensures that the soap liquid can be evenly released during use, and also avoids the soap liquid in the soap storage layer 2 directly penetrating into the quick-drying layer 4 during curing and losing quickly. The functions of each layer structure of the sponge 1 are distinct, which improves the practicality of the product.

[0043] Wherein, the soap storage layer 2 is made of water-absorbing resin, and the transition layer 3 and quick-drying layer 4 are both made of polyurethane foam. The water-absorbing resin has strong water absorption and water retention capacity, can effectively absorb and store soap liquid, ensure that the soap liquid will not be lost quickly during curing or use, and also help the soap to continuously release the soap liquid during use, thereby improving the durability and storage capacity of the soap liquid. The polyurethane foam also has good water absorption capacity and air permeability, which helps the soap liquid to discharge water smoothly when curing in the sponge 1, accelerates the curing process, and the polyurethane foam has good structural stability, which helps to maintain the shape and structural stability of the sponge 1.

[0044] Furthermore, it also includes a hydrophobic layer 5, which includes polyester fiber 51 and a hydrophobic coating 52. The hydrophobic coating 52 is evenly coated on the polyester fiber 51, and the hydrophobic coating 52 is made of polydimethylsiloxane. The hydrophobic layer 5 is arranged between the transition layer 3 and the quick-drying layer 4. The hydrophobic layer 5 can effectively prevent the soap liquid or soap foam from being sucked back into the sponge 1 during use, especially when the soap liquid has been used up or there are a lot of soap foam during use, which effectively improves the hygiene of the product; the hydrophobic layer 5 also helps to control the distribution range of the soap liquid, ensuring that the soap liquid is mainly concentrated in the soap storage layer 2 and the transition layer 3, rather than penetrating into the quick-drying layer 4, especially in the curing stage, which effectively avoids the loss of soap liquid.

[0045] It is worth noting that during use, the hydrophobic layer 5 will cause soap bubbles to float on the surface of the quick-drying layer 4. These used soap bubbles or soap liquids can be washed away by rinsing with clean water, further ensuring the hygiene of the product. Moreover, the polyester fiber 51 itself has a certain hydrophobicity and is also suitable as the base material of the hydrophobic layer 5. At the same time, it has good tensile strength and toughness, which can effectively improve the overall mechanical properties of the sponge 1. It is worth mentioning that the subsequent hydrophilic coating can also be coated on the non-hydrophobic coating 52 surface of the polyester fiber 51 to avoid the coating peeling phenomenon caused by the incompatibility of the hydrophilic coating and the hydrophobic coating 52; and adding another layer of hydrophilic coating on the hydrophobic coating 52 may affect the water absorption speed and efficiency of the hydrophilic coating due to the presence of the hydrophobic coating 52. Therefore, the polyester fiber 51, which is not as hydrophobic as the hydrophobic coating 52, also plays a good transition role.

[0046] Furthermore, the sponge 1 further comprises a hydrophilic layer 6, which is a hydrophilic coating made of polyvinyl alcohol. The hydrophilic coating is arranged between the hydrophobic layer 5 and the transition layer 3, one side of the hydrophilic layer 6 is fixedly connected to one side of the hydrophobic layer 5, the hydrophilic layer 6 faces the transition layer 3, and the hydrophobic layer 5 faces the quick-drying layer 4. The presence of the hydrophilic layer 6 helps to ensure the effective transmission of soap liquid from the soap storage layer 2 to the transition layer 3 during use. During use, after the soap liquid passes through the hydrophilic layer 6, it continues to flow at the interface between the hydrophilic layer 6 and the hydrophobic layer 5. During this period, the soap liquid can reach the quick-drying layer 4 with larger pores through the capillary action of the sponge 1 itself, so as to avoid the accumulation of soap liquid at the hydrophilic layer 6, and secondly, the quick-drying layer 4 can also have soap liquid or soap foam when in use, thereby improving the coverage and use efficiency of the soap liquid.

[0047] The hydrophobic coating 52 is made of polydimethylsiloxane, and the hydrophilic coating is made of polyvinyl alcohol. This is because polydimethylsiloxane has good hydrophobicity and polyvinyl alcohol has good hydrophilicity. At the same time, polydimethylsiloxane and polyvinyl alcohol are both harmless to the human body. In addition, since polydimethylsiloxane and polyvinyl alcohol both have long molecular chains, they both have good flexibility and are very suitable for use in products such as sponge 1 that often need to undergo extrusion and deformation.

[0048] The present invention also provides a method for preparing a sponge-in-one soap, the steps of which are as follows:

[0049] S1: Cut the coconut soap base into small pieces, and then heat it to completely melt it into a liquid state;

[0050] S2: adding a hardener, a dispersant and a preservative to the liquid coconut oil soap base in sequence, and then stirring the mixture to form a soap liquid;

[0051] S3: compressing the sponge 1 and soaking it in soap solution, so that the sponge 1 naturally rebounds to its original shape in the soap solution;

[0052] S4: Take out the sponge 1 soaked with soap solution and allow it to dry and solidify naturally.

[0053] The preparation method can be used to evenly distribute soap particles in the sponge 1, and the soap liquid can be solidified in the sponge 1 by means of a hardener, thereby producing a sponge-integrated soap.

[0054] It is worth noting that both the soap and the sponge 1 use ingredients that are harmless to the human body and will not cause skin irritation or allergic reactions. The resulting sponge soap has good safety. At the same time, the integrity of the sponge 1 is not destroyed, so that the sponge 1 still retains its original water absorption capacity and elasticity, further ensuring its ability to evenly absorb soap liquid.

[0055] In the step S4, the quick-drying layer 4 of the sponge 1 needs to be placed upward during the curing process. In this way, the loss of soap liquid during the curing process can be reduced, and the soap liquid can be retained in the soap storage layer 2 with smaller pores. At the same time, the water can be evaporated faster, accelerating the curing process of the soap liquid.

[0056] In this way, the present invention provides a sponge-in-one soap and a preparation method thereof, and the prepared sponge-in-one soap can directly contact the skin, so that the soap particles are evenly distributed in the sponge 1, ensuring that after encountering water, the soap liquid can also flow evenly to each use surface of the sponge 1, thereby significantly improving the cleaning effect. In addition, the used soap liquid or soap foam will not flow back into the sponge 1, ensuring the hygiene and durability of the product.

[0057] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sponge-in-one soap, comprising soap particles and a sponge, wherein the soap particles are distributed in the sponge, characterized in that: The soap particles include the following ingredients: a coconut oil soap base and a hardener for limiting the movement of the soap particles in the pores of the sponge. The hardener includes sodium alginate providing a macromolecular chain with negative charge and a calcium salt for bridging adjacent macromolecular chains of sodium alginate.

2. The sponge-in-one soap according to claim 1, characterized in that: The soap particles also include a dispersant for reducing the surface tension of the soap liquid and increasing the fluidity of the soap liquid, and the dispersant is glycerol.

3. The sponge-in-one soap according to claim 2, characterized in that: The calcium salt is calcium chloride.

4. The sponge-in-one soap according to claim 2, characterized in that: Also included is a preservative, which is vitamin E.

5. The sponge-in-one soap according to claim 1, characterized in that: The sponge comprises a soap storage layer, a transition layer and a quick-drying layer arranged in sequence from top to bottom, wherein the soap storage layer, the transition layer and the quick-drying layer all have a pore structure, the pores of the soap storage layer are smaller than those of the transition layer, and the pores of the transition layer are smaller than those of the quick-drying layer.

6. The sponge-in-one soap according to claim 5, characterized in that: The soap storage layer is made of water-absorbing resin, and the transition layer and the quick-drying layer are both made of polyurethane foam.

7. The sponge-in-one soap according to claim 6, characterized in that: It also includes a hydrophobic layer, which includes polyester fibers and a hydrophobic coating. The hydrophobic coating is evenly coated on the polyester fibers and is made of polydimethylsiloxane. The hydrophobic layer is arranged between the transition layer and the quick-drying layer.

8. The sponge-in-one soap according to claim 7, characterized in that: It also includes a hydrophilic layer, which is a hydrophilic coating made of polyvinyl alcohol. The hydrophilic coating is arranged between the hydrophobic layer and the transition layer. One side of the hydrophilic layer is fixedly connected to one side of the hydrophobic layer. The hydrophilic layer faces the transition layer, and the hydrophobic layer faces the quick-drying layer.

9. The method for preparing the sponge-in-one soap according to any one of claims 1 to 8, characterized in that: Here are the steps: S1: Cut the coconut soap base into small pieces, and then heat it to completely melt it into a liquid state; S2: adding a hardener, a dispersant and a preservative to the liquid coconut oil soap base in sequence, and then stirring the mixture to form a soap liquid; S3: compress the sponge and soak it in soap solution, so that the sponge will naturally rebound to its original shape in the soap solution; S4: Take out the sponge soaked with soap solution and let it dry naturally.

10. The method for preparing the sponge-in-one soap according to claim 9, characterized in that: In step S4, the quick-drying layer of the sponge needs to be placed upward during the curing process.

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