TWI812925B - Composite multilayer structure for biodegradable cleaning and method of making same - Google Patents

Abstract

A biodegradable cleaning composite multi-layered structure is provided, which includes: a solid protective layer, which includes a surface surfactant cured product; a core part, which includes a core surfactant cured product and a cleaning component, and the core interface The active agent cured product contains the cleaning component, and the core part is covered in the solid protective layer. Through the biodegradable cleaning composite multi-layered structure of the present invention, it can resist moisture in humid environments, and can achieve the effect of preventing leakage of contents (such as cleaning ingredients) during transportation and storage, and can reduce The use of packaging materials achieves environmentally friendly effects.

Description

Biodegradable cleaning composite multi-layered structure and manufacturing method thereof

The invention relates to a biodegradable cleaning composite multi-layered structure and a manufacturing method thereof.

According to the conventional composite capsules, they include an inner layer and an outer layer, and the inner layer and the outer layer are respectively coated with various contents such as medicines, lotions, and skin care products. For example, the content of the inner layer can be conditioner, lotion, etc.; and the content of the outer layer can be shampoo, shower gel, etc. The contents of the inner and outer layers can be used together.

As for the structure of the inner and outer layers, it is usually a soft polyvinyl alcohol (PVA) film or a PVA film mixed with polyvinyl butyral (PVB). And because PVA has high solubility in water, it can quickly dissolve when it comes into contact with water, thereby releasing its contents.

With the conventional composite capsule, the release timing of the contents can be controlled, and the various contents mentioned above can be released sequentially from the outer layer to the inner layer.

However, although conventional composite capsules can quickly dissolve and release their contents when in contact with water, they have the problem of being difficult to transport and store. For example, if a conventional composite capsule is stored in a humid environment, the PVA film may dissolve due to the water contained in the humidity, causing the problem of leakage of the contents during storage. In addition, since PVA films are usually used to cover liquid lotions, the selection of raw materials for the contents covered by them is limited.

In order to solve the problem of difficulty in transportation and storage of conventional composite capsules, additional packaging is needed to isolate moisture in the environment. However, if additional packaging (such as plastic wrapping) is used, there will be problems of environmental pollution. Therefore, in the current situation where environmental awareness is on the rise, there is still room for further improvement because conventional composite capsules for cleaning have shortcomings such as being susceptible to moisture, difficult to shape, difficult to preserve, and limited in the selection of raw materials for covering the contents.

In order to solve the above problems, the present invention provides a composite multi-layered structure for biodegradable cleaning, which includes: a solid protective layer, which includes a surface surfactant cured product; and a core part, which includes a core surfactant cured product. and a cleaning component, the core surfactant cured product contains the cleaning component, and the core part is covered in the solid protective layer.

In one embodiment, the core part includes: a central layer that includes a first core surfactant cured product and contains a cleaning component; and a coating layer that includes a second core surfactant cured product and contains It contains ingredients for accelerating dissolution, and the coating layer covers the central layer.

In one embodiment, the weight ratio of the central layer, the covering layer and the solid protective layer is 2:2:1.

In one embodiment, the core part includes a plurality of layers, and at least one of the plurality of layers contains a cleaning ingredient, and the other layers each contain the same or different cleaning ingredients or ingredients for accelerating dissolution.

In one embodiment, the cleaning ingredients are selected from the group consisting of laundry detergent, laundry powder, softener, bleaching water, bleaching powder, soap powder, soap liquid, toothpaste, facial cleanser, shower gel, shampoo and skin care products. At least any one of the group; and the ingredient for accelerating dissolution is selected from at least any one of the group consisting of baking soda, citric acid, corn flour, essence and vegetable oil.

In one embodiment, the surface of the solid protective layer has a plurality of holes, and the area of the holes on the surface of the solid protective layer accounts for 5 to 40 volume % of the surface area of the solid protective layer.

In one embodiment, at least any one of the group consisting of the surface surfactant cured product, the core surfactant cured product, the first core surfactant cured product and the second core surfactant cured product It is a cured product of at least one selected from the group consisting of soap base, coconut oil and palm oil.

In one embodiment, at least any one of the group consisting of the surface surfactant cured product, the core surfactant cured product, the first core surfactant cured product and the second core surfactant cured product It also includes additives, and the additives are at least any one selected from the group consisting of oils, essential oils, thickeners and water-repellent agents.

A method for manufacturing a biodegradable cleaning composite multi-layered structure according to the present invention includes: (a) heating the surfactant under water at 40~60°C, then pouring it into a mold, and then heating it at 0~60°C. Cool at 4°C for 5 to 20 minutes to solidify and form the surface surfactant cured product precursor, and sequentially generate two surface surfactant cured product precursors; (b) Combine the two surface surfactant cured product precursors The object is slightly separated from the aforementioned mold, and then the molded body is placed on the aforementioned two surface surfactant cured precursors to form a space for accommodating the core; (c) add additional surfactant at 40~ Heating with water at 60°C, then pouring the precursor of the aforementioned molded body and the two surface-layer surfactant cured products, and then cooling at 0-4°C for 60-120 minutes to solidify and shape into two surface-layer surfactants. The cured product, and then demoulding the aforementioned two surface-layer surfactant cured products; (d) Place the core part into the two surface-layer surfactant cured products, and then apply additional surfactant to the two surface-layer surfactant cured products. The joints of the surfactant cured products are then thermally pressed together to form a coating. There is a solid protective layer with a core part; (e) Cool the solid protective layer covered with the core part at 25~32°C for 40~80 minutes to obtain a composite multi-layered structure for biodegradable cleaning.

In one embodiment, the aforementioned core part is formed in the following manner: (1) encapsulating the cleaning component in the cured product of the first core surfactant to form a central layer; (2) enclosing the second core surfactant The cured product is placed in the model part, and the component for accelerating dissolution is encapsulated in the cured product of the second core surfactant to form a coating layer; (3) the coating layer covers the central layer.

One aspect of the present invention was completed in view of the above-mentioned conventional problems. Its purpose is to provide a biodegradable cleaning composite multi-layered structure and a manufacturing method thereof. Although its solid protective layer is smaller than the conventional PVA film, The solubility in water is low, so it takes more time for the contents to dissolve. However, the aforementioned solid protective layer can resist moisture in humid environments, thereby preventing the contents from leaking during transportation and storage. effect, and can reduce the use of packaging to achieve environmentally friendly effects.

10, 10’, 10”: Composite multi-layered structure for biodegradable cleaning

1: Solid protective layer

11:hole

2: Core Department

21:Coating layer

22: Center layer

A: Cleaning ingredients

B: Ingredients for accelerating dissolution

(a)~(e): steps

[Fig. 1] is a schematic cross-sectional view of a composite multi-layered structure for biodegradable cleaning according to one embodiment of the present invention.

[Fig. 2] is a schematic cross-sectional view of a composite multi-layered structure for biodegradable cleaning according to another embodiment of the present invention.

[Fig. 3] is a schematic three-dimensional view of a composite multi-layered structure for biodegradable cleaning according to another embodiment of the present invention.

[Fig. 4] is a flow chart of a manufacturing method of a biodegradable cleaning composite multi-layered structure according to one embodiment of the present invention.

<Example 1: Composite multi-layered structure 10 for biodegradable cleaning>

First, please refer to FIG. 1 , which is a schematic cross-sectional view of a biodegradable cleaning composite multi-layered structure according to one embodiment (Embodiment 1) of the present invention. As shown in Figure 1, the present invention provides a biodegradable cleaning composite multi-layered structure 10, which includes: a solid protective layer 1 and a core part 2. Furthermore, as shown in FIG. 1 , the cross-section of the biodegradable cleaning composite multi-layered structure 10 is circular, that is, the biodegradable cleaning composite multi-layered structure 10 can be spherical.

Wherein, the solid protective layer 1 includes surface surfactant cured product components. The solid protective layer 1 is formed by the solidified surface surfactant cured product. The solid protective layer 1 has a certain thickness and covers the core part 2 . The thickness of the solid protective layer may be, for example, 0.01 to 0.3 cm as described below.

In addition, the surface layer surfactant cured product is a surfactant cured product. And as for the aforementioned surfactant, at least any one of the group consisting of soap base, coconut oil and palm oil can be selected. In other words, the surface surfactant cured product may be at least one cured product selected from the group consisting of soap base, coconut oil, and palm oil. Furthermore, from the viewpoint of structural strength, the surfactant is preferably a soap base.

In addition, the core part 2 includes a core surfactant cured product (indicated by symbol 2 in Figure 1) and a cleaning component A, and the core surfactant cured product contains the cleaning component A. In addition, the core portion 2 is covered in the aforementioned solid protective layer 1 . In Example 1, when the biodegradable cleaning composite multi-layered structure 10 is placed in water, the solid protective layer 1 will first dissolve, then the core surfactant cured product will dissolve, and then the cleaning ingredient A will dissolve.

The selection of the core surfactant cured product is the same as the aforementioned surface layer surfactant cured product. In addition, the core surfactant cured product may be the same as or different from the surface surfactant cured product.

In addition, additives can be added to the surface surfactant cured product and/or the core surfactant cured product as needed. As for the additive, it can be at least any one selected from the group consisting of oils, essential oils, thickeners and water-repellent agents.

By using grease and/or water-repellent agent as additives, the water resistance of the surface surfactant cured product and/or the core surfactant cured product can be increased. By using essential oils as additives, the surface surfactant cured product and/or the core surfactant cured product can have a fragrance effect. By using a thickener as an additive, the strength of the surface surfactant cured product and/or the core surfactant cured product can be increased.

The cleaning ingredient A can be, for example, a group consisting of laundry detergent, washing powder, softener, bleaching water, bleaching powder, soap powder, liquid soap, toothpaste, facial cleanser, shower gel, shampoo and skin care products. At least one of the groups. For example, when washing clothes, cleaning ingredient A including laundry detergent, washing powder, soap powder or soap liquid can be used. When washing your body, you can use cleansing ingredient A including body wash.

Moreover, examples of skin care products include lotions, essences, creams, lotions, and the like.

<Example 2: Biodegradable cleaning composite multi-layered structure 10’>

Next, please refer to FIG. 2 , which is a schematic cross-sectional view of a biodegradable cleaning composite multi-layered structure according to another embodiment (Embodiment 2) of the present invention. As shown in Figure 2, the present invention provides a biodegradable cleaning composite multi-layered structure 10', which includes: a solid protective layer 1 and a core part 2. Among them, the core part 2 The system can also be divided into a covering layer 21 and a central layer 22. Furthermore, as shown in Figure 2, the cross-section of the biodegradable cleaning composite multi-layered structure 10' is circular, that is, the biodegradable cleaning composite multi-layered structure 10' can be spherical.

The central layer 22 includes the first core surfactant cured product (indicated by the symbol 22 in Figure 1) and contains the cleaning component A. In addition, the coating layer 21 includes the second core surfactant cured product (indicated by the symbol 21 in FIG. 1) and contains the component B for accelerating dissolution. And the coating layer 21 covers (covers) the central layer 22 . Therefore, in Example 2, when the biodegradable cleaning composite multi-layered structure 10' is placed in water, after the solid protective layer 1 is dissolved, the second core surfactant cured product will be dissolved first, and the dissolution will be accelerated. Dissolve component B; then the first core surfactant cured product is dissolved, and then the cleaning component A is dissolved.

Next, the materials of the first core surfactant cured product and the second core surfactant cured product may be the same as the core surfactant cured product in Example 1, and are not particularly limited. In addition, the material of the cleaning component A can be the same as the cleaning component A in Example 1 and is not particularly limited.

Next, as for the material of component B for accelerating dissolution, at least any one of the group consisting of baking soda, citric acid, corn flour, essence and vegetable oil can be selected. The dissolution-accelerating component B can produce a rapid dissolution effect with water to accelerate the dissolution of the solid protective layer 1, the coating layer 21, the central layer 22 and other layers.

Moreover, as a specific example, the cleaning component A can be soap powder, and the dissolving component B can be citric acid. Among them, soap powder can wash clothes and enter the body, and through citric acid, soap scum can be removed.

In a preferred embodiment, as mentioned above, because the solid protective layer (surface surfactant cured product) has lower solubility in water than the conventional water-soluble film, it requires more time to dissolve the contents. Therefore, the weight ratio of the solid protective layer (surface surfactant cured product) is preferably smaller than that of the core part 2 . In a specific preferred embodiment, the weight ratio of the central layer 22, the covering layer 21 and the solid protective layer 1 is 2:2:1. Furthermore, in a preferred embodiment, the thickness of the solid protective layer is 0.01 to 0.3 centimeters, so that it can maintain moisture resistance while also having appropriate solubility in water. In addition, the thickness of the central layer 22 and the coating layer 21 is not particularly limited, and the thickness of the central layer 22 and the coating layer 21 is preferably smaller than the thickness of the solid protective layer 1 .

<Example 3: Composite multi-layered structure 10″ for biodegradable cleaning>

Next, please refer to Figure 3, which is a three-dimensional schematic diagram of a biodegradable cleaning composite multi-layered structure 10" according to another embodiment of the present invention (Embodiment 3). As shown in Figure 3, the present invention provides a biodegradable cleaning composite multi-layered structure 10". The composite multi-layered structure 10" for decomposition and cleaning includes: a solid protective layer 1 and a core part 2. In addition, what is different from Examples 1 to 2 is that the surface of the solid protective layer 1 has a plurality of holes 11, and the biodegradable cleaning composite multi-layered structure 10″ is in a rectangular shape.

As mentioned above, because the solid protective layer 1 has lower solubility in water than conventional water-soluble films, it takes more time to dissolve the contents. Each hole 11 can reduce the time for the contents to dissolve. In a specific preferred embodiment, in order to take into account both moisture resistance and water solubility, the area of the holes 11 on the surface of the solid protective layer 1 occupies 5 to 40 volumes of the surface area of the solid protective layer 1 %, and preferably 10~30 volume%.

In addition, as for the depth of the holes 11, as long as it is less than the thickness of the solid protective layer 1, the depth of the holes 11 is preferably 0.005~0.1 cm and is not particularly limited. In addition, the diameter of the holes 11 can be 0.05~0.1 centimeters and is not particularly limited. Also, the shape of the hole 11 There are no special restrictions for the case. In order to further increase the solubility of the solid protective layer 1 in water while maintaining moisture resistance, the holes 11 are preferably tapered from the outside to the inside (that is, from the direction from the solid protective layer 1 to the core 2 ). holes.

By arranging the holes 11 on the surface of the solid protective layer 1, it is possible to increase the contact area between moisture and the solid protective layer 1 while maintaining moisture resistance, and through the moisture generated after the moisture penetrates into the holes 11 The friction between the water and the solid protective layer 1 enables the water to dissolve the solid protective layer 1 in a shorter time, thereby accelerating the dissolution of the core portion 2 .

<Modification 1>

Although Embodiment 2 reveals that the core part 2 includes a central layer 22 and a coating layer 21, and the central layer 22 contains a cleaning component A, and the coating layer 21 contains a component B for accelerating dissolution, it is not limited thereto. For example, the covering layer 21 may contain the cleaning component A in the same manner as the central layer 22 . In a specific implementation, the covering layer 21 may contain shower gel, and the central layer 22 may contain skin care products (such as lotion). In this way, the biodegradable cleansing composite multi-layered structure can first release the shower gel and then the lotion during the body cleansing and maintenance process, so as to facilitate the user to clean and moisturize the body one after another.

<Modification 2>

Although Embodiments 1 to 3 respectively disclose that the core part 2 has one layer and two layers, the core part 2 may include a plurality of layers (two or more layers) and is not limited thereto. In the case where the core part 2 is a plurality of layers (two or more layers), at least one of the plurality of layers contains cleaning ingredients, and the other layers each contain the same or different cleaning ingredients or ingredients for accelerating dissolution. . For example, the core part 2 can be composed of four layers, and contain cleaning ingredients, ingredients for accelerating dissolution, cleaning ingredients and ingredients for accelerating dissolution from the inside out.

<Method for manufacturing composite multi-layered structure for biodegradable cleaning>

Next, the method for manufacturing the biodegradable cleaning composite multi-layered structure of the present invention will be described below. First, please refer to FIG. 4 , which is a flow chart of a manufacturing method of a biodegradable cleaning composite multi-layered structure according to an embodiment of the present invention.

As shown in Figure 4, a method for manufacturing a biodegradable cleaning composite multi-layered structure according to one embodiment of the present invention includes steps (a) to (e).

-(a)Step-

The soap solution (soap-based liquid) as the surfactant is heated with water at 40~60℃, then poured into the mold, and then cooled at 0~4℃ for 5~20 minutes to solidify and form the surface layer of interfacial activity. agent cured product precursor, and generate two surface surfactant cured product precursors in sequence. Here, the shape and size of the mold are not particularly limited and can be adjusted as needed. Examples include a hemispherical mold with a diameter of 1 to 3 cm, a square mold with a side length of 1 to 3 cm, and the like.

-(b)Step-

Separate the aforementioned two surface-layer surfactant cured product precursors slightly from the aforementioned mold (for example, 0.1~1.0 cm apart), and then place the molded body on the aforementioned two surface-layer surfactant cured product precursors to form a mold for use. space to accommodate the core. Here, the shape and size of the molded body are not particularly limited and can be adjusted as needed. Examples include a spherical molded body with a diameter of 0.5 to 1 cm, a square molded body with a side length of 0.5 to 1 cm, etc. . By placing the molded body on the surface surfactant cured product precursor, the molded body can be used to press out a space for accommodating the core portion.

-(c)Step-

Heat the additional soap solution (surfactant) with water at 40~60°C, then pour the aforementioned molded body and the two aforementioned surface active agent cured product precursors, and then cool it at 0~4°C for 60~ 120 minutes to The two surface-layer surfactant cured products are solidified and formed into two, and then the two surface-layer surfactant cured products are demoulded (completely separated from the mold).

-(d)Step-

Place the core part into the two surface-layer surfactant cured products respectively, then apply additional soap solution to the joint of the two surface-layer surfactant cured products, and then heat-press the two surface-layer surfactant cured products. , to form a solid protective layer (surface surfactant cured product layer) covering the core part. By applying additional soap solution to the joint of the two surface surfactant cured products, the bonding force between the two surface surfactant cured products can be strengthened. In addition, in this step, the temperature of thermal pressing is preferably 60~80°C.

In addition, in a preferred embodiment, the core part includes a central layer and a covering layer as in Embodiment 2, and the core part can be formed in the following manner: (1) The cleaning component is encapsulated in the first core interface The active agent cured product is placed in the second core surfactant cured product to form a central layer; (2) the second core surfactant cured product is placed in the model part, and the dissolution-accelerating component is encapsulated in the second core surfactant cured product to form a coating layer; (3) Cover (cover) the central layer with the coating layer.

The cleaning ingredients, the first core surfactant cured product, the second core surfactant cured product, and the dissolution-accelerating ingredients here can be the same as those described in the aforementioned embodiments 1 to 3. In addition, as for the model component here, its shape and size are preferably matched with the aforementioned mold, and its size must be smaller than the aforementioned mold. In a specific implementation, when the mold is a hemispherical mold with a diameter of 2 cm, the model part may be a hemispherical model part with a diameter of 1 cm.

Furthermore, it is also possible to form a core portion having a plurality of layers (two or more layers) based on the above-mentioned method. Specifically, another core surfactant cured product containing cleaning ingredients (for example, the Three-core surfactant cured product), covering (coating) the coating layer and the central layer that have gone through the aforementioned steps (1) to (3).

In addition, if the cleaning ingredient/dissolution-accelerating ingredient is a solid, it is better to fill it into the core surfactant cured product by placing it; if the cleaning ingredient/dissolution-accelerating ingredient is a liquid, it is better It is filled into the core surfactant cured product by injection.

-(e)Step-

The aforementioned solid protective layer (surfactant solidified surface layer) covered with the core is cooled at 25-32°C for 40-80 minutes to obtain the biodegradable cleaning composite multi-layered structure of the present invention.

-(f)Step-

Step (f) is an optional step. A plurality of holes can be formed in the solid protective layer by at least one of the following methods: (1) in the aforementioned step (a), using a mold with a plurality of protrusions; (2) after the aforementioned step (e), The solid protective layer is opened. The shape of the plurality of protrusions is not particularly limited, and may be round protrusions, elongated protrusions, etc. In addition, as for the above-mentioned method of opening the hole, the hole can be opened by drilling with a tool, or the hole can be opened by burning through, and is not particularly limited.

<Specific usage patterns>

The biodegradable cleaning composite multi-layered structure 10' of the above embodiment 2 (wherein the surface surfactant cured product, the first core surfactant cured product and the second core surfactant cured product are soap base; for cleaning Component A is soap powder; component B for accelerating dissolution is citric acid) is placed in a washing machine containing clothes to be washed, and the solid protective layer 1 is gradually dissolved by the moisture in the washing machine and the agitation of the washing machine. In particular, because there are still some micro gaps at the junction of the two surface layers of the surfactant cured products of the solid protective layer 1, moisture can easily enter there and allow it to quickly dissolve. And after at least a part of the solid protective layer 1 (such as the above-mentioned joint) is dissolved, the moisture in the washing machine will interact with the water contained in the coating layer 21 The dissolution-accelerating component B comes into contact and the dissolution-accelerating component B is released, thereby accelerating the dissolution of the solid protective layer 1, the coating layer 21, the core layer 22 and other layers. Finally, the cleaning component A, the dissolution-accelerating component B and the surface surfactant solidified component of the solid protective layer 1 can be dissolved from the biodegradable cleaning composite multi-layered structure 10', and the surface surfactant cured component of the solid protective layer 1 can be washed with these components. Clothes to be washed.

Through the composite multi-layered structure for biodegradable cleaning and its manufacturing method of the present invention, a composite multi-layered structure for biodegradable cleaning can be provided, which is moisture-proof (humidity) and can resist moisture in a humid environment, and It will not dissolve due to high ambient temperature (for example, 70°C), and can achieve the effect of preventing leakage of contents during transportation and storage, and has good transportability. In addition, the biodegradable cleaning composite multi-layered structure of the present invention is portable and can reduce the use of packaging (waste and plastic reduction) to achieve environmentally friendly effects. In addition, the components contained in the biodegradable cleaning composite multi-layer structure of the present invention are biodegradable, so no pollution will be caused after use and discharge.

Furthermore, as mentioned above, since the shape and size of the mold are not particularly limited, the composite multi-layered structure for biodegradable cleaning of the present invention has high plasticity (degree of moldability). Moreover, the ingredients included in the biodegradable cleaning composite multi-layered structure of the present invention are highly complex (different layers can contain different dosage forms and can be used in water phase, oil phase or powder product mixing), making the biodegradable cleaning product of the present invention The composite multi-layer structure for cleaning has a wide range of applications and can be used, for example, for household cleaning, personal cleaning, beauty care, etc.

The present invention is not limited to the above-described embodiments, and various changes can be made within the scope indicated in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the present invention. within the technical scope.

10: Composite multi-layered structure for biodegradable cleaning

1: Solid protective layer

2: Core Department

A: Cleaning ingredients

Claims (5)

A composite multi-layered structure for biodegradable cleaning, which includes: a solid protective layer, which includes a surface surfactant cured product; a core part, which includes a central layer and a covering layer, and the aforementioned core part is coated in In the aforementioned solid protective layer; wherein, the aforementioned central layer includes a first core surfactant cured product and contains cleaning ingredients; the aforementioned coating layer includes a second core surfactant cured product and contains ingredients for accelerating dissolution , and the coating layer covers the central layer; and the surface surfactant cured product, the first core surfactant cured product and the second core surfactant cured product are selected from soap base, coconut oil and palm tree. The cured product of at least one member of the group consisting of oil; the cleaning ingredient is selected from laundry detergent, washing powder, softener, bleaching water, bleaching powder, soap powder, soap liquid, toothpaste, facial cleanser, shower gel, At least one of the group consisting of shampoo and skin care products; the ingredient for accelerating dissolution is selected from at least one of the group consisting of baking soda and citric acid. The biodegradable cleaning composite multi-layered structure as claimed in claim 1, wherein the weight ratio of the central layer, the covering layer and the solid protective layer is 2:2:1. The biodegradable cleaning composite multi-layered structure as described in claim 1, wherein the core part also includes other layers, and the aforementioned other layers contain cleaning ingredients or ingredients for accelerating dissolution. The biodegradable cleaning composite multi-layer structure as described in any one of claims 1 to 3, wherein the surface of the solid protective layer has a plurality of holes, and the area of the holes on the surface of the solid protective layer is Accounting for 5 to 40 volume% of the surface area of the solid protective layer. A method of manufacturing a composite multi-layered structure for biodegradable cleaning, which includes: (a) heating the surfactant in water at 40~60°C, then pouring it into a mold, and then cooling it at 0~4°C for 5 seconds ~20 minutes, the surface surfactant cured product precursor is solidified and formed, and two surface surfactant cured product precursors are generated in sequence; (b) The two surface surfactant cured product precursors are slightly separated from the aforementioned mold. Separate, and then place the molded body on the two aforementioned surface surfactant cured precursors to form a space for accommodating the core part; (c) Water-proof the additional surfactant at 40~60°C Heating, and then pouring the precursors of the aforementioned molding body and the two surface-layer surfactant cured products, and then cooling at 0 to 4°C for 60-120 minutes to solidify and shape into two surface-layer surfactant cured products, and then Demold the aforementioned two surface-layer surfactant cured products; (d) Place the core part into the two surface-layer surfactant cured products, and then apply additional surfactant to the joint of the two surface-layer surfactant cured products. , and then heat-press the two surfactant cured products to form a solid protective layer covering the core; (e) Cool the solid protective layer covered with the core part at 25~32°C for 40~80 minutes to obtain a biodegradable cleaning composite multi-layered structure; wherein the core part is formed in the following manner: (1) The cleaning ingredients are encapsulated in the first core surfactant cured product to form a central layer; (2) The second core surfactant cured product is placed in the mold part, and the dissolution-accelerating ingredient is encapsulated in The second core surfactant cured product is used to form a coating layer; (3) the aforementioned coating layer covers the aforementioned central layer; and the surface layer surfactant cured product, the first core surfactant cured product and the second core The surfactant cured product is a cured product of at least one selected from the group consisting of soap base, coconut oil and palm oil; the cleaning ingredient is selected from the group consisting of laundry detergent, washing powder, softener, bleaching water, At least any one of the group consisting of bleaching powder, soap powder, liquid soap, toothpaste, facial cleanser, shower gel, shampoo and skin care products; the ingredient for accelerating dissolution is selected from the group consisting of baking soda and citric acid At least one of the groups.

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