Bacteriostatic slow-release structure, washing machine and cleaning device

Abstract

The application provides a bacteriostatic slow-release structure, a washing machine and a cleaning device. The bacteriostatic slow-release structure comprises an insoluble base frame, a water-soluble auxiliary material and a functional material, wherein the functional material comprises a guanidine substance. Thus, when the bacteriostatic slow-release structure is in contact with water, the functional material flows into the water along with the dissolution of the water-soluble auxiliary material. Since the guanidine substance has good bacteriostatic effect, the bacteriostatic slow-release structure can have long-term bacteriostatic effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of materials, in particular to a bacteriostatic slow-release structure, a washing machine and a cleaning device. BACKGROUND

[0002] At present, the common way to realize the functions of deodorization, descaling and sterilization is to add functional substances such as guanidine in the working environment. In order to facilitate use and maintain long-term effectiveness, the above-mentioned functional substances usually need to be loaded in a carrier, such as silver phosphate which needs to be carried in glass, natural antibacterial agents and guanidine which need to be carried in a plastic matrix, and activated carbon which can load descaling salts. However, in essence, the above-mentioned functional substances are randomly dispersed in the matrix, and it is difficult to form a stable release path. Therefore, in theory, only the functional substances dispersed on the surface of the matrix can be released and function, but the functional substances in the interior of the matrix are difficult to dissolve and release, and cannot fully release the functional substances for a long time to realize the function of long-term sterilization. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, one object of the present application is to provide a bacteriostatic slow-release structure which can completely release functional materials in a water environment, and the functional materials can be effectively utilized.

[0004] In one aspect of the present application, a bacteriostatic slow-release structure is provided. According to an embodiment of the present application, the bacteriostatic slow-release structure comprises: an insoluble base frame, a water-soluble auxiliary material, and a functional material, wherein the functional material comprises a guanidine substance. Thus, when the bacteriostatic slow-release structure is in contact with water, the functional material flows into the water along with the dissolution of the water-soluble auxiliary material. Since the guanidine substance has good bacteriostatic effect, the bacteriostatic slow-release structure can have long-term bacteriostatic effect.

[0005] According to an embodiment of the present application, the guanidine substance comprises polyhexamethylene guanidine.

[0006] According to an embodiment of the present application, the bacteriostatic slow-release structure comprises: 30-70 parts by weight of the insoluble base frame; 15-60 parts by weight of the water-soluble auxiliary material; and 1-35 parts by weight of the functional material.

[0007] According to an embodiment of the present application, the bacteriostatic slow-release structure further comprises 5-10 parts by weight of a chain extender.

[0008] According to an embodiment of the present application, a chemical bond is connected between the water-soluble auxiliary material and the insoluble base frame.

[0009] According to an embodiment of the present application, the water-soluble auxiliary material forms a dissolving part in the insoluble base frame, the dissolving part being in a continuous structure, and the functional material is located in the dissolving part.

[0010] According to an embodiment of the present application, the width of the dissolving part is 50 nanometers to 50 micrometers.

[0011] According to an embodiment of the present application, the water-soluble auxiliary material includes at least one of polyvinyl alcohol, polyethylene glycol and polyethylene oxide.

[0012] According to an embodiment of the present application, the insoluble base frame includes at least one of plastic, rubber and fiber.

[0013] According to an embodiment of the present application, the functional material includes at least one of water softener and scale remover.

[0014] In another aspect of the present application, the present application provides a washing machine. According to an embodiment of the present application, the washing machine includes the bacteriostatic slow-release structure as described above, and the bacteriostatic slow-release structure is arranged on a water inlet pipeline of the washing machine. Thus, when the washing machine is used to wash clothes, water flushes the bacteriostatic slow-release structure on the water inlet pipeline, so that the functional material dispersed in the water-soluble auxiliary material can be released into the environment outside the insoluble base frame with the dissolution of the water-soluble auxiliary material in water, and since the dispersion of the water-soluble auxiliary material in the bacteriostatic slow-release structure has a certain continuity, all the functional material on the surface and inside of the insoluble base frame can be completely released gradually with the use of the bacteriostatic slow-release structure, thereby prolonging the use time of the bacteriostatic slow-release structure and improving the utilization rate of the material, and avoiding the waste of the functional material.

[0015] In another aspect of the present application, the present application provides a cleaning device. According to an embodiment of the present application, the cleaning device includes the bacteriostatic slow-release structure as described above, and the bacteriostatic slow-release structure is arranged on a water inlet pipeline of the cleaning device. Thus, when the cleaning device is used to clean, water flushes the bacteriostatic slow-release structure on the water inlet pipeline, so that the functional material dispersed in the water-soluble auxiliary material can be released into the environment outside the insoluble base frame with the dissolution of the water-soluble auxiliary material in water, and since the dispersion of the water-soluble auxiliary material in the bacteriostatic slow-release structure has a certain continuity, all the functional material on the surface and inside of the insoluble base frame can be completely released gradually with the use of the bacteriostatic slow-release structure, thereby prolonging the use time of the bacteriostatic slow-release structure and improving the utilization rate of the material, and avoiding the waste of the functional material. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of which:

[0017] Figure 1 is a schematic diagram of a bacteriostatic sustained-release structure in one embodiment of the present application.

[0018] Figure 2 is a flow chart of a method for preparing a bacteriostatic sustained-release structure in one embodiment of the present application. DETAILED DESCRIPTION

[0019] The present application will be described with respect to the following examples. It is to be understood that the following examples are merely illustrative of the present application and should not be considered limiting of the scope of the present application. Unless otherwise indicated, the techniques and conditions used in the examples are in accordance with those described in the literature or as provided by the manufacturer of the products used. Unless otherwise indicated, the reagents and materials used in the examples were obtained from suppliers that are well known in the art.

[0020] The present application will be described with respect to the following examples. It is to be understood that the following examples are merely illustrative of the present application and should not be considered limiting of the scope of the present application. Unless otherwise indicated, the techniques and conditions used in the examples are in accordance with those described in the literature or as provided by the manufacturer of the products used. Unless otherwise indicated, the reagents and materials used in the examples were obtained from suppliers that are well known in the art.

[0021] In one aspect of the present application, a bacteriostatic sustained-release structure is provided. According to an embodiment of the present application, the bacteriostatic sustained-release structure includes an insoluble base frame, a water-soluble auxiliary material, and a functional material including a guanidine-based substance. Thus, when the bacteriostatic sustained-release structure is contacted with water, the functional material flows into the water along with the dissolution of the water-soluble auxiliary material, and the bacteriostatic sustained-release structure can have a long-term bacteriostatic effect due to the good bacteriostatic effect of the guanidine-based substance.

[0022] According to the embodiment of the present application, the bacteriostatic sustained-release structure comprises: 30-70 parts by weight (such as 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight, 55 parts by weight, 60 parts by weight, 65 parts by weight, 70 parts by weight) of insoluble base frame; 15-60 parts by weight (such as 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight, 55 parts by weight, 60 parts by weight) of water-soluble auxiliary material; and 1-35 parts by weight (such as 1 part by weight, 5 parts by weight, 10 parts by weight, 15 parts by weight, 18 parts by weight, 20 parts by weight, 23 parts by weight, 25 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, 34 parts by weight, 35 parts by weight) of functional material. Thus, the bacteriostatic sustained-release structure of the above components has appropriate amounts of water-soluble auxiliary material and functional material, so that the insoluble base frame, water-soluble auxiliary material and functional material in the bacteriostatic sustained-release structure have appropriate volume ratios, ensuring the structural stability of the bacteriostatic sustained-release structure and the release rate and efficacy of the functional material; if the amount of the insoluble base frame is too large, i.e. the volume fraction of the water-soluble auxiliary material and functional material in the bacteriostatic sustained-release structure is small, the volume fraction of the water-soluble auxiliary material and functional material is small, which will relatively reduce the use time of the bacteriostatic sustained-release structure, and the internal skeleton of the insoluble base frame is relatively tight, which makes it difficult for the water-soluble auxiliary material and functional material inside the bacteriostatic sustained-release structure to contact water, thus making it difficult to dissolve or the dissolution rate too slow, reducing the effect of the bacteriostatic effect of the functional material; on the contrary, if the amount of the insoluble base frame is too small, i.e. the volume fraction of the insoluble base frame in the bacteriostatic sustained-release structure is small, and relatively more water-soluble auxiliary material and functional material are contained, the stability between the water-soluble auxiliary material and the insoluble base frame is relatively poor, and the dissolution rate of the water-soluble auxiliary material and functional material is too fast, which is easy to cause waste of materials. The amount of the above functional material and water-soluble auxiliary material can make the functional material uniformly dispersed in the water-soluble auxiliary material, and the concentration of the functional material in the water-soluble auxiliary material is better, and thus the functional material is effectively released with the dissolution of the water-soluble auxiliary material. Thus, by controlling the amount of each component, the dissolution rate of the water-soluble auxiliary material and functional material can be controlled, which can not only meet the requirements of the bacteriostatic effect of the functional material of the bacteriostatic sustained-release structure, but also avoid the dissolution of the functional material being too fast, causing waste of materials. The specific amount of the functional material can be set by the person skilled in the art within 1-35 parts by weight, such as the functional material containing silver ions, which can appropriately reduce the amount of the functional material.

[0023] In the embodiment of the present application, the bacteriostatic slow-release structure further comprises 5-10 parts by weight (such as 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 10 parts by weight) of a chain extender. Thus, the addition of the chain extender can reduce the water dissolution rate of the dissolution part by changing the insoluble base frame and chemically reacting with the water-soluble auxiliary material, and optimize the slow-release time, thereby achieving controllability of the dissolution rate from both physical and chemical means.

[0024] In the embodiment of the present application, the water-soluble auxiliary material and part of the active insoluble base frame are connected by a chemical bond through the introduction of a reactive chain extender. Specifically, the chemical bond is formed by adding a chain extender that can react with the water-soluble auxiliary material and the active insoluble base frame during melt blending, thereby performing chain extension reaction. If the insoluble base frame is a polyester containing hydroxyl or carboxyl groups, the chain extender can be selected to contain an epoxy group, which reacts with the terminal hydroxyl group of the water-soluble auxiliary material and the carboxyl or hydroxyl group of the insoluble base frame material, thereby connecting them together through a chemical bond. Thus, the bonding force between the dissolution part and the insoluble base frame can be improved, so as to improve the stability of the bacteriostatic slow-release structure, avoid the dissolution part from falling off the insoluble base frame, and affect the product quality; moreover, the dissolution rate of the water-soluble auxiliary material can be controlled, thereby controlling the release rate of the functional material in the bacteriostatic slow-release structure, and prolonging the use time of the bacteriostatic slow-release structure while ensuring the effective action of the functional material.

[0025] According to the embodiment of the present application, with reference to Figure 1 , the water-soluble auxiliary material 20 forms a dissolution part 20 (i.e. Figure 1 the white area in the middle) that communicates with the outside of the insoluble base frame 10, the dissolution part 20 has a continuous structure, and the functional material is located in the dissolution part 20. Thus, the functional material is dispersed in the dissolution part, and the functional material can be released into the environment outside the insoluble base frame along with the dissolution of the water-soluble auxiliary material in water; moreover, since the dissolution part has a continuous structure, all the functional materials on the surface and inside of the insoluble base frame can be completely released gradually along with the use of the bacteriostatic slow-release structure, thereby prolonging the use time of the bacteriostatic slow-release structure, keeping good bacteriostatic effect for a long time, and improving the utilization rate of the material and avoiding waste of the functional material.

[0026] In the embodiment of the present application, with reference to Figure 1, the width d of the dissolving part is 50 nanometers to 50 micrometers, such as d is 50 nanometers, 100 nanometers, 300 nanometers, 500 nanometers, 800 nanometers, 1 micrometer, 5 micrometers, 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers. Thus, the dissolving part in the above width range can make water molecules pass through smoothly, and the functional material and water-soluble auxiliary after dissolving of the dissolving part pass through smoothly, without the adverse phenomenon of blockage; and the dissolution rate of the dissolving part can also be controlled by controlling the width of the dissolving part, wherein the width of the dissolving part can be realized by factors such as the amount of the insoluble base frame and the process conditions for preparing the bacteriostatic slow-release structure. As can be understood by those skilled in the art, as described above, the width of the dissolving part at different positions in the bacteriostatic slow-release structure is not completely the same, as long as the width is within the range of d between 50 nanometers and 50 micrometers. Figure 1

[0027] In the embodiments of the present application, the water-soluble auxiliary includes at least one of polyvinyl alcohol, polyethylene glycol and polyethylene oxide. The water-soluble auxiliary of the above-mentioned materials has a better solubility, can slowly dissolve when water flows through, and does not chemically react with the functional material when water is encountered, thereby ensuring the stability of the bacteriostatic slow-release structure; at the same time, the safety of the above-mentioned materials is better, and after dissolving in water, it will not affect the clothes; in addition, because the solubility of different water-soluble auxiliaries in water is different, the dissolution rate of the dissolving part can also be controlled by selecting different specific types of water-soluble auxiliaries in the present application to meet different application requirements and application environments of the bacteriostatic slow-release structure.

[0028] In some embodiments, the molecular weight of the water-soluble auxiliary can be 5 to 3 million, and the water-soluble auxiliary with the above-mentioned molecular weight has a suitable solubility, and the dissolution rate of the dissolving part can also be controlled by controlling the molecular weight of the water-soluble auxiliary in the present application. If the molecular weight of the water-soluble auxiliary is less than 50,000, the dissolving part is not easy to shape, and the solvent rate is too fast; if the molecular weight of the water-soluble auxiliary is greater than 3 million, the limit of the dissolving part is relatively large, which is not easy to process and form a continuous dissolving part structure.

[0029] In the embodiments of the present application, the insoluble base frame includes at least one of plastic (such as polyethylene, polypropylene, polylactic acid), rubber and fiber. The insoluble base frame formed by the above-mentioned materials has good stability and is not easy to deform under the impact of a certain water flow; and is stable in nature and not easy to deteriorate; the insoluble base frame of the above-mentioned materials can form a chemical bond with the water-soluble auxiliary of the above-mentioned materials, thereby improving the stability of the bacteriostatic slow-release structure.

[0030] ​According to an embodiment of the present application, the guanidine substance includes polyhexamethylene guanidine. The polyhexamethylene guanidine has good bacteriostatic efficacy as a bacteriostatic active substance. In the technical solution of the present application, the polyhexamethylene guanidine is gradually released with the water-soluble excipient, so that the bacteriostatic slow-release structure has a long-term bacteriostatic effect, that is, has a long service life. In some embodiments, the functional material can also include other bactericides, such as amino acid type bactericides, quaternary ammonium salt type bactericides, metal type bactericides, metal oxide type bactericides (such as silver nitrate and copper sulfate), polyphenol type bactericides, pyridine type bactericides, and plant extract type bactericides.

[0031] In an embodiment of the present application, the functional material includes at least one of a water softener and a scale remover. Thus, the bacteriostatic slow-release structure has the functions of water softening, scale removal, and sterilization. Those skilled in the art can flexibly select appropriate functional materials according to the actual situation of the application and environment of the bacteriostatic slow-release structure to meet the application requirements of the bacteriostatic slow-release structure. The water softener can be phosphate, silicate, imidazole sulfonate, amino acid derivative, hydroxy acid and its derivative, polyacrylic acid and its derivative, etc. The scale remover can be sodium citrate, polyaspartic acid sodium, and ethylenediaminetetraacetic acid disodium, etc.

[0032] According to an embodiment of the present application, referring to Figure 2 , the method for preparing the bacteriostatic slow-release structure can include:

[0033] S100: First blending the functional material with the water-soluble excipient, and performing first granulation treatment on the mixture obtained by the first blending to obtain a sub-master batch, wherein the functional material includes a guanidine substance.

[0034] According to an embodiment of the present application, the water-soluble excipient is subjected to a drying treatment before the first blending. By pre-drying the water-soluble excipient, the water adsorbed by the water-soluble excipient is removed, so that the water-soluble excipient is prevented from being dissolved by water, thereby affecting the stability of the bacteriostatic slow-release structure. If the functional material has water absorption, the water-soluble excipient and the functional material can be dried together in advance (of course, if the functional material has poor water absorption, the functional material can not be dried), so as to prevent the water in the functional material from dissolving the water-soluble excipient, thereby affecting the efficacy of the functional material and the stability of the bacteriostatic slow-release structure. In some embodiments of the present application, the drying temperature is 50-80°C, such as 50°C, 60°C, 65°C, 70°C, 75°C, or 80°C. Those skilled in the art can select the drying temperature according to the specific material types of the water-soluble excipient and the functional material, so as to quickly remove the water adsorbed by the functional material without affecting the performance of the functional material. Further, the drying time is 4-8 hours.

[0035] Further, before the first blending, the functional material and the water-soluble auxiliary can be ground in advance, so as to improve the uniformity of the mixture of the functional material and the water-soluble auxiliary. In addition, an adhesive can be added during the first blending, so as to improve the stability of the sub-master batch, i.e., the stability of the dissolving part in the subsequent obtained bacteriostatic slow-release structure.

[0036] According to the embodiments of the present application, the working temperature of the first blending is not particularly required, and the person skilled in the art can flexibly select the working temperature according to the specific types of the functional material and the water-soluble auxiliary and the specific equipment of the extruder (used for blending) and the like. In some embodiments, a double-screw extruder can be used for blending, and when the double-screw extruder is used, the working temperature of the first zone of the double-screw extruder is about 50°C, and the working temperature of the remaining working zones (such as the second zone and the third zone) is 160°C-190°C.

[0037] According to the embodiments of the present application, before the first granulation treatment, the mixture obtained by the first blending is subjected to a first air cooling treatment. As described above, the product obtained after the blending by the extruder has a high temperature of about 160°C-190°C, and is not easy to be shaped. Therefore, in order to facilitate the subsequent granulation, the product after the blending needs to be subjected to an air cooling treatment. According to the embodiments of the present application, the mixture obtained by the first blending is subjected to the first air cooling treatment to below 50°C. Thus, the product subjected to the air cooling treatment has a better hardness, and is easy to be cut and granulated.

[0038] Further, the particle size of the sub-master batch is 2-5 mm, and the sub-master batch with such a size can be more uniformly mixed with the insoluble high molecular material, which is beneficial to the continuous dissolving part and is not easy to be agglomerated. If the particle size of the sub-master batch is less than 2 mm, the sub-master batch is relatively easy to be agglomerated, and is not beneficial to the uniformity of the mixture. If the particle size of the sub-master batch is greater than 5 mm, the subsequent distribution of the dissolving part in the bacteriostatic slow-release structure is not uniform, and the continuity of the dissolving part is affected.

[0039] S200: sequentially subjecting the sub-master batch and the insoluble high molecular material to a second blending and a second granulation treatment, to obtain a bacteriostatic slow-release structure.

[0040] According to the embodiments of the present application, the working temperature of the second blending is not particularly required, and the person skilled in the art can flexibly select the working temperature according to the specific types of the insoluble high molecular material and the specific equipment of the extruder (used for blending) and the like. In some embodiments, a double-screw extruder can be used for blending, and when the double-screw extruder is used, the working temperature of the first zone of the double-screw extruder is about 50°C, and the working temperature of the remaining working zones (such as the second zone and the third zone) is 160°C-190°C.

[0041] According to an embodiment of the present application, before the second granulation process, the second blended mixture is subjected to a second air cooling process. As mentioned above, the product after blending by the extruder has a high temperature, about 160-190°C, and is not easy to be shaped. Therefore, in order to facilitate the subsequent granulation, the blended product needs to be subjected to an air cooling process. According to an embodiment of the present application, the second blended mixture is subjected to the second air cooling process to below 50°C. In this way, the product subjected to the air cooling process has a better hardness, facilitating the cutting and granulation. Further, the particle size of the bacteriostatic and sustained-release structure is 1-5 mm.

[0042] According to an embodiment of the present application, in the above preparation method, the functional material and the water-soluble auxiliary are blended and granulated first, and then the sub-primary granules and the insoluble polymer material are blended and granulated. In this way, the water-soluble auxiliary forms the dissolving part of the bacteriostatic and sustained-release structure, the functional material is dispersed in the dissolving part, the insoluble polymer material forms the insoluble framework in the bacteriostatic and sustained-release structure, and the dissolving part is connected to the outside of the insoluble framework and has a continuous structure. In this way, the functional material can be released into the environment outside the insoluble framework along with the dissolution of the water-soluble auxiliary in water. Further, since the dissolving part has a continuous structure, all the functional material on the surface and inside the insoluble framework can be completely released gradually along with the use of the bacteriostatic and sustained-release structure, thereby prolonging the use time of the bacteriostatic and sustained-release structure and improving the utilization rate of the material, and avoiding the waste of the functional material.

[0043] According to an embodiment of the present application, the functional material and the chain extender are blended with the water-soluble auxiliary in the first blending, and / or the sub-primary granules and the insoluble polymer material are blended with the chain extender in the second blending. In this way, the addition of the chain extender can cause the chemical reaction between the insoluble polymer material and the water-soluble auxiliary by changing the insoluble polymer material, thereby reducing the water dissolution rate of the dissolving part and achieving the controllability of the dissolution rate from both physical and chemical aspects.

[0044] In another aspect of the present application, the present application provides a washing machine. According to an embodiment of the present application, the washing machine comprises the above bacteriostatic and sustained-release structure, which is arranged on the water inlet pipeline. In this way, when the washing machine is used to wash clothes, the water washes the bacteriostatic and sustained-release structure on the water inlet pipeline, so that the functional material dispersed in the water-soluble auxiliary can be released into the environment outside the insoluble framework along with the dissolution of the water-soluble auxiliary in water. Further, since the dispersion of the water-soluble auxiliary in the bacteriostatic and sustained-release structure has a certain continuity, all the functional material on the surface and inside the insoluble framework can be completely released gradually along with the use of the bacteriostatic and sustained-release structure, thereby prolonging the use time of the bacteriostatic and sustained-release structure and improving the utilization rate of the material, and avoiding the waste of the functional material.

[0045] In the embodiments of the present application, the bacteriostatic slow-release structure can be arranged in a detergent box in a washing machine, so that water flushes the slow-release structure when flowing through the detergent, causing the dissolving part to dissolve, and the functional material to enter the washing barrel with the water flow.

[0046] In another aspect of the present application, the present application provides a cleaning device. According to the embodiments of the present application, the cleaning device comprises the above-mentioned bacteriostatic slow-release structure arranged on a water inlet pipeline. Thus, when the cleaning device is cleaning, water flushes the bacteriostatic slow-release structure on the water inlet pipeline, so that the functional material dispersed in the water-soluble auxiliary material can be released into the environment outside the insoluble base frame with the dissolution of the water-soluble auxiliary material in water, and since the dispersion of the water-soluble auxiliary material in the bacteriostatic slow-release structure has a certain continuity, all the functional materials on the surface and inside of the insoluble base frame can be gradually completely released with the use of the bacteriostatic slow-release structure, thereby prolonging the use time of the bacteriostatic slow-release structure and improving the utilization rate of the material, and avoiding the waste of the functional material.

[0047] According to the embodiments of the present application, the specific types of cleaning devices include but are not limited to washing machines, dishwashers and other cleaning devices that need to be washed with water, and those skilled in the art can select the specific types of functional materials according to the specific purposes of the cleaning devices to achieve different cleaning effects.

[0048] Embodiments

[0049] Embodiment 1

[0050] The polyethylene oxide (PEO, water-soluble auxiliary material) and polyhexamethylene guanidine (functional material) were subjected to drying treatment, the drying temperature was 50℃, and the drying time was 6h;

[0051] The polyethylene oxide (PEO) and polyhexamethylene guanidine were subjected to first blending by using a double-screw extruder, the working temperature of the double-screw extruder was: the temperature of the first zone was 50℃, the temperature of the second zone was 150℃, the temperature of the third zone was 170℃, the temperature of the fourth zone was 175℃, the temperature of the fifth zone was 175℃, the temperature of the sixth zone was 175℃, and the temperature of the die was 160℃; and the mixture obtained by the first blending was subjected to first air cooling treatment to below 50℃.

[0052] The mixture subjected to the first air cooling treatment was subjected to first granulation treatment to obtain sub-mother particles, and the particle size of the sub-mother particles was 2-5mm;

[0053] The sub-mother particles and polyethylene (PE, insoluble high molecular material) were subjected to second blending by using a double-screw extruder, the working temperature of the double-screw extruder was: the temperature of the first zone was 150℃, the temperature of the second zone was 160℃, the temperature of the third zone was 170℃, the temperature of the fourth zone was 170℃, the temperature of the fifth zone was 170℃, the temperature of the sixth zone was 170℃, and the temperature of the die was 160℃.

[0054] The second blended mixture is subjected to a second air cooling treatment to below 50°C;

[0055] The mixture subjected to the second air cooling treatment is subjected to a second granulation treatment to obtain a bacteriostatic slow-release structure in which the width d of the dissolving part is between 50 nanometers and 50 micrometers,

[0056] In the above preparation method, the amount of the insoluble high molecular material is 60 parts by weight, the amount of the water-soluble auxiliary material is 20 parts by weight, and the amount of the functional material is 20 parts by weight.

[0057] Example 2

[0058] The polyethylene oxide (PEO) and the polyhexamethylene guanidine are subjected to a drying treatment at a drying temperature of 50°C for 6 hours;

[0059] The polyethylene oxide (PEO) and the polyhexamethylene guanidine are subjected to a first blending using a twin-screw extruder, and the working temperature of the twin-screw extruder is: the temperature of the first zone is 50°C, the temperature of the second zone is 150°C, the temperature of the third zone is 170°C, the temperature of the fourth zone is 175°C, the temperature of the fifth zone is 175°C, the temperature of the sixth zone is 175°C, and the temperature of the die is 160°C;

[0060] The first blended mixture is subjected to a first air cooling treatment to below 50°C;

[0061] The mixture subjected to the first air cooling treatment is subjected to a first granulation treatment to obtain a sub-master batch, and the particle size of the sub-master batch is between 2 and 5 mm;

[0062] The sub-master batch and the polypropylene (PP) are subjected to a second blending using a twin-screw extruder, and the working temperature of the twin-screw extruder is: the temperature of the first zone is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 180°C, the temperature of the fourth zone is 180°C, the temperature of the fifth zone is 180°C, the temperature of the sixth zone is 180°C, and the temperature of the die is 170°C;

[0063] The second blended mixture is subjected to a second air cooling treatment to below 50°C;

[0064] The mixture subjected to the second air cooling treatment is subjected to a second granulation treatment to obtain a bacteriostatic slow-release structure in which the width d of the dissolving part is between 50 nanometers and 50 micrometers,

[0065] In the above preparation method, the amount of the insoluble high molecular material is 60 parts by weight, the amount of the water-soluble auxiliary material is 20 parts by weight, and the amount of the functional material is 20 parts by weight.

[0066] Example 3

[0067] The polyethylene oxide (PEO) and polyhexamethylene guanidine are subjected to drying treatment, the drying temperature is 50℃, and the drying time is 6h;

[0068] The polyethylene oxide (PEO), polyhexamethylene guanidine and chain extender ADR are subjected to first blending by using a double screw extruder, the working temperature of the double screw extruder is: the temperature of the first zone is 50℃, the temperature of the second zone is 150℃, the temperature of the third zone is 170℃, the temperature of the fourth zone is 175℃, the temperature of the fifth zone is 175℃, the temperature of the sixth zone is 175℃, and the temperature of the die is 160℃;

[0069] The mixture obtained by the first blending is subjected to first air cooling treatment to below 50℃;

[0070] The mixture subjected to the first air cooling treatment is subjected to first granulation treatment to obtain sub-mother particles, the particle size of the sub-mother particles is 2-5mm;

[0071] The sub-mother particles and polylactic acid (PLA) are subjected to second blending by using a double screw extruder, the working temperature of the double screw extruder is: the temperature of the first zone is 170℃, the temperature of the second zone is 180℃, the temperature of the third zone is 180℃, the temperature of the fourth zone is 185℃, the temperature of the fifth zone is 185℃, the temperature of the sixth zone is 180℃, and the temperature of the die is 170℃;

[0072] The mixture obtained by the second blending is subjected to second air cooling treatment to below 50℃;

[0073] The mixture subjected to the second air cooling treatment is subjected to second granulation treatment to obtain the bacteriostatic slow-release structure, in the bacteriostatic slow-release structure, the width d of the dissolving part is between 50nm and 50μm,

[0074] In the preparation method, the amount of the insoluble high molecular material is 50 parts by weight, the amount of the water-soluble auxiliary material is 30 parts by weight, the amount of the functional material is 10 parts by weight, and the amount of the chain extender is 10 parts by weight.

[0075] Comparative Example 1

[0076] The polyethylene oxide (PEO) is subjected to drying treatment, the drying temperature is 50℃, and the drying time is 6h;

[0077] The polyethylene oxide (PEO) and copper sulfate (CuSO4) are subjected to first blending by using a double screw extruder, the working temperature of the double screw extruder is: the temperature of the first zone is 50℃, the temperature of the second zone is 150℃, the temperature of the third zone is 170℃, the temperature of the fourth zone is 175℃, the temperature of the fifth zone is 175℃, the temperature of the sixth zone is 175℃, and the temperature of the die is 160℃;

[0078] The mixture obtained by the first blending is subjected to first air cooling treatment to below 50℃;

[0079] The mixture treated by the first air cooling is subjected to a first granulation treatment to obtain sub-primary particles, and the particle size of the sub-primary particles is 2-5 mm;

[0080] The sub-primary particles and polypropylene (PP) are subjected to a second blending by using a twin-screw extruder, and the working temperature of the twin-screw extruder is: the temperature of the first zone is 160℃, the temperature of the second zone is 170℃, the temperature of the third zone is 180℃, the temperature of the fourth zone is 180℃, the temperature of the fifth zone is 180℃, the temperature of the sixth zone is 180℃, and the temperature of the die is 170℃;

[0081] The mixture obtained by the second blending is subjected to a second air cooling to below 50℃;

[0082] The mixture treated by the second air cooling is subjected to a second granulation treatment to obtain the bacteriostatic slow-release structure, and the width d of the dissolving part is between 50 nm and 50 μm,

[0083] In the preparation method, the amount of the insoluble high molecular material is 60 parts by weight, the amount of the water-soluble auxiliary is 20 parts by weight, and the amount of the functional material is 20 parts by weight.

[0084] Comparative Example 2

[0085] The polyethylene (PE) and the polyhexamethylene guanidine are subjected to a drying treatment, and the drying temperature is 50℃ and the drying time is 6 h;

[0086] The polyethylene (PE), the polyethylene oxide (PEO) and the polyhexamethylene guanidine are subjected to a blending by using a twin-screw extruder, and the working temperature of the twin-screw extruder is: the temperature of the first zone is 150℃, the temperature of the second zone is 160℃, the temperature of the third zone is 170℃, the temperature of the fourth zone is 170℃, the temperature of the fifth zone is 170℃, the temperature of the sixth zone is 170℃, and the temperature of the die is 160℃;

[0087] The mixture obtained by the first blending is subjected to an air cooling to below 50℃;

[0088] The mixture treated by the air cooling is subjected to a granulation treatment to obtain the functional composite material,

[0089] In the preparation method, the amount of the insoluble high molecular material is 60 parts by weight, the amount of the water-soluble auxiliary is 20 parts by weight, and the amount of the functional material is 20 parts by weight.

[0090] Table 1

[0091] Service life Use of functional material Example 1 Flushing for 48 h 90％ Example 2 Flushing for 40 h 95％ Example 3 Flushing for 48 h 85％ Comparative Example 1 Flushing for 30 h 97％ Comparative Example 2 Flushing for 10 h 40％

[0092] Among them, 20g of the bacteriostatic slow-release structure prepared in examples 1-7 and the functional composite material prepared in comparative example 1 were respectively taken, then the samples taken were continuously washed for a certain time, the flow rate of the washing water was 7L / min, after washing, drying (50 degrees Celsius) and weighing, then washing for a certain time, drying and weighing were carried out again, and the cycle was continued until the slow release of the functional material and the function of the bacteriostatic slow-release structure were not obvious. The above washing time refers to the time during which the functional material can normally function, and if the washing is continued, the functional material is released slowly, and the function of the bacteriostatic slow-release structure is not obvious. The use rate of the functional material = (the initial weight of the bacteriostatic slow-release structure - the weight of the bacteriostatic slow-release structure after washing and drying) / the initial weight of the bacteriostatic slow-release structure * 100%.

[0093] As can be seen from table 1, compared with comparative example 1, the slow-release time of the bacteriostatic slow-release structure prepared in examples 1-3 is longer, and the use rate of the functional material is also higher, that is, the bacteriostatic slow-release structure prepared in examples 1-3 has a long-term bacteriostatic effect. In addition, compared with comparative example 2, the slow-release time of the bacteriostatic slow-release structure prepared in examples 1-3 is longer, and the use rate of the functional material is also higher; in comparative example 2, the washing is continued for a long time, and the use rate of the functional material still maintains at a low level.

[0094] The terms "first", "second", "third", etc. are used herein only to describe different instances, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0095] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction.

[0096] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A bacteriostatic slow release structure, characterized by, comprising: 30 to 70 parts by weight of an insoluble base frame; 15 to 60 parts by weight of a water-soluble auxiliary; and 1 to 35 parts by weight of a functional material, the functional material including a guanidine-based substance, the water-soluble auxiliary forming a dissolving portion in the insoluble base frame, the dissolving portion being continuous and communicating with the outside of the insoluble base frame, the functional material being located in the dissolving portion.

2. The bacteriostatic slow-release structure according to claim 1, wherein, The guanidine-based substance includes polyhexamethylene guanidine.

3. The bacteriostatic slow-release structure of claim 1, wherein, Further comprising 5 to 10 parts by weight of a chain extender.

4. The bacteriostatic slow release structure according to claim 3, wherein, A chemical bond is formed between the water-soluble auxiliary and the insoluble base frame.

5. The bacteriostatic slow release structure according to claim 4, wherein, The dissolving portion has a width of 50 nanometers to 50 micrometers.

6. The bacteriostatic slow-release structure according to any one of claims 1 to 5, wherein, The water-soluble auxiliary includes at least one of polyvinyl alcohol, polyethylene glycol, and polyethylene oxide.

7. The bacteriostatic slow-release structure according to any one of claims 1 to 5, wherein The insoluble base frame includes at least one of a plastic, a rubber, and a fiber.

8. The bacteriostatic slow-release structure according to any one of claims 1 to 5, wherein, The functional material further includes at least one of a water softener and a scale remover.

9. A laundry machine characterized by The bacteriostatic slow-release structure according to any one of claims 1 to 8 is provided on a water inlet line of the washing machine.

10. A cleaning apparatus, characterized by The bacteriostatic slow-release structure according to any one of claims 1 to 8 is provided on a water inlet line of the cleaning device.

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