Rice packaging method and system with moisture-proof function

Abstract

The invention provides a rice packaging method and system with a damp-proof function. Rice is subjected to damp-proof pretreatment to reduce the initial moisture content; a composite damp-proof layer with double functions of moisture absorption and blocking is arranged on the inner side of the package body; the pretreated rice is put into a packaging body and sealed and packaged to form a closed space; a humidity monitoring unit is arranged in the closed space to collect humidity data in real time; and starting a moisture-proof regulation and control mechanism according to the humidity data, and maintaining the humidity in the space within a preset range. According to the scheme, through the closed-loop design of pretreatment, composite moisture prevention, sealing, monitoring and regulation, active moisture prevention and dynamic humidity regulation in the rice storage process are achieved, the quality guarantee period of rice is effectively prolonged, the taste quality of the rice is kept, and the technical problems that traditional packaging is poor in moisture prevention effect and cannot adapt to environment humidity changes are solved.

Description

Technical Field

[0001] This invention relates to the field of rice packaging technology, specifically to a rice packaging method and system with moisture-proof function. Background Technology

[0002] As a staple food for Chinese residents, proper moisture control and preservation during storage are crucial to ensuring the quality of rice. Rice is highly hygroscopic, easily absorbing moisture from the environment during storage. This increased moisture content leads to problems such as mold, clumping, and insect infestation, affecting not only taste and nutritional value but also potentially producing harmful substances like aflatoxin, which can endanger human health. Conversely, if the storage environment is too dry, the rice will lose excessive moisture, resulting in a poorer texture and increased brittleness, similarly impacting the eating experience.

[0003] In existing rice packaging technologies, moisture-proofing methods mainly focus on the following aspects: First, using a single plastic film (such as PE or PP) for sealing, relying on the barrier properties of the film to block external moisture, but the barrier effect of a single material is limited and cannot deal with residual moisture inside the packaging; Second, placing desiccants (such as silica gel or calcium chloride) inside the packaging to achieve moisture-proofing through physical adsorption, but the moisture absorption capacity of desiccants is limited, and once saturated, they lose their moisture-proofing effect, and users cannot know whether the desiccant has expired, creating a moisture-proofing blind spot; Third, pre-drying the rice, but lacking a subsequent humidity maintenance mechanism, it is still prone to moisture absorption problems when the humidity of the transportation or storage environment changes significantly.

[0004] Furthermore, existing moisture-proofing technologies are mostly passive, unable to dynamically adjust to changes in humidity within the packaging, and therefore difficult to adapt to varying humidity levels in different regions and seasons. For example, in the southern rainy season, humidity can exceed 80%, making it difficult for traditional packaging to effectively prevent moisture intrusion; while in northern winters, humidity is below 30%, and simple moisture-absorbing designs can lead to excessive water loss in rice. Simultaneously, existing packaging lacks intuitive humidity feedback, preventing users from knowing in real-time whether the rice storage environment is safe. Therefore, providing a rice packaging solution that offers long-lasting moisture protection, dynamically adapts to humidity changes, and allows for intuitive monitoring has become a pressing technical challenge for the industry. Summary of the Invention

[0005] This invention provides a rice packaging method and system with moisture-proof function, which can realize active moisture-proof and dynamic humidity control during rice storage, extend shelf life and maintain taste and quality.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides a method for packaging rice with moisture-proof function, comprising the following steps:

[0008] Pre-treating rice to prevent moisture loss reduces its initial moisture content.

[0009] A composite moisture-proof layer is provided on the inside of the packaging body, which has the dual functions of moisture absorption and barrier.

[0010] The pre-treated rice is packed into the packaging body, and the packaging body is sealed to form a closed packaging space.

[0011] A humidity monitoring unit is installed inside the sealed packaging space to collect humidity data in the sealed packaging space in real time.

[0012] Based on the humidity data, a preset moisture control mechanism is activated to maintain the humidity within the sealed packaging space within a preset range.

[0013] As a further improvement to the technical solution of the present invention, the moisture-proof pretreatment of rice specifically includes:

[0014] Place the rice in a low-temperature drying device and dry it for 4-6 hours at 35-45℃ and 20-30% relative humidity.

[0015] After drying, the moisture content of the rice was measured using an infrared moisture meter to ensure that the moisture content of the rice was ≤13.5%.

[0016] If the moisture content exceeds the standard, return to the drying step and extend the drying time by 1-2 hours until the moisture content requirement is met.

[0017] Low-temperature drying avoids starch gelatinization and deterioration of taste caused by high-temperature processing, while precisely controlling moisture content within a safe range, reducing the rice's own moisture absorption potential from the source. The use of an infrared moisture meter enables rapid and accurate moisture detection, ensuring that the pretreatment effect meets standards.

[0018] As a further improvement to the technical solution of the present invention, the composite moisture-proof layer comprises, from the outside to the inside, a barrier layer, a moisture-absorbing layer, and an inner lining layer. The barrier layer is made of high-density polyethylene (HDPE) film with a thickness of 20-30 μm; the moisture-absorbing layer is made of modified bentonite / non-woven fabric composite material, wherein the modified bentonite accounts for 30-40% by mass and has a thickness of 15-25 μm; the inner lining layer is made of food-grade polypropylene (PP) film with a thickness of 10-15 μm. The three-layer structure is composited by hot melt adhesive at a composite temperature of 120-140℃.

[0019] The barrier layer uses HDPE film, leveraging its excellent moisture-blocking properties to prevent moisture from entering the environment. The absorbent layer uses a modified bentonite / non-woven fabric composite material. After sodium treatment, the modified bentonite has increased interlayer porosity, significantly improving its moisture absorption capacity, while the non-woven fabric substrate ensures uniform moisture absorption and structural stability. The inner lining layer uses food-grade PP film to ensure safety in direct contact with rice, while also providing some breathability for easy humidity control. This three-layer composite structure achieves dual protection of "external barrier and internal absorption," providing a more durable and stable moisture-proof effect compared to single moisture-proof materials.

[0020] As a further improvement to the technical solution of the present invention, the sealing and encapsulation of the packaging body specifically includes:

[0021] The packaging body is circumferentially sealed using a heat-sealing process. The heat-sealing temperature is 160-180℃, the heat-sealing pressure is 0.3-0.5MPa, and the heat-sealing time is 2-3 seconds.

[0022] An annular elastic sealing strip is added to the inside of the heat-sealing area. The sealing strip is made of food-grade silicone with a Shore hardness of 50-60A, a width of 5-8mm, and an overlap of ≥95% with the heat-sealing edge.

[0023] The dual sealing design, combining heat sealing and elastic sealing strips, effectively enhances the packaging's airtightness, preventing external moisture from entering through the seal. The food-grade silicone sealing strips possess excellent elasticity and aging resistance, maintaining their sealing performance even when subjected to compression or temperature changes during transportation.

[0024] As a further improvement to the technical solution of the present invention, the humidity monitoring unit includes a miniature humidity sensor and a low-power data transmission module. The miniature humidity sensor has a measurement range of 0-100%RH, a measurement accuracy of ±2%RH, and a response time of ≤8 seconds. The data transmission module adopts Bluetooth Low Energy (BLE) 5.0 technology or NFC technology to transmit humidity data in real time to an external terminal or a control trigger module built into the packaging.

[0025] Miniature humidity sensors are small in size and low in power consumption, and can be embedded inside packaging without affecting rice storage. The application of BLE5.0 or NFC technology enables wireless transmission of humidity data, allowing users to view the humidity status inside the packaging in real time via mobile phones and other terminals, solving the problem that traditional packaging cannot monitor humidity.

[0026] As a further improvement to the technical solution of the present invention, the moisture-proof control mechanism specifically includes:

[0027] The preset humidity threshold range is 40-60%RH, with a warning threshold of 60%RH and a lower limit threshold of 40%RH.

[0028] When the humidity data is greater than or equal to the warning threshold, the built-in moisture-absorbing module is activated. The moisture-absorbing module is a replaceable superabsorbent polymer (SAP) bag, which is connected to the sealed packaging space through a breathable membrane with a pore size of 50-100μm. The moisture absorption capacity of a single SAP bag is greater than or equal to 300% of its own weight.

[0029] When the humidity data is ≤ the lower limit threshold, the moisture absorption module is turned off; if the humidity is below 30%RH for 24 hours, the micro-humidification regulation is activated, releasing a preset amount of water vapor through the breathable micropores of the inner lining to prevent the rice from losing too much water and causing a deterioration in taste.

[0030] The preset humidity range of 40-60%RH is the optimal humidity range for rice storage, preventing both moisture absorption and mold growth while avoiding excessive water loss. The replaceable SAP moisture-absorbing module has a large moisture absorption capacity and high safety; users can replace it according to humidity data prompts, extending the moisture-proof life of the packaging. The micro-humidity regulation function is achieved through the breathable micropores in the inner lining layer. The amount of moisture released can be precisely controlled by the pore size and number, ensuring that the rice is always in the optimal storage humidity environment.

[0031] As a further improvement to the technical solution of the present invention, a visual humidity indicator area is provided on the outer surface of the packaging body. The humidity indicator area uses a reversible color-changing humidity indicator. The indicator uses agar as a carrier to load cobalt chloride. When the humidity in the sealed space is 40-60%RH, it is blue; when it is ≥60%RH, it is pink; and when it is ≤40%RH, it is dark blue. The color change response time is ≤10 minutes.

[0032] The visual humidity indicator provides users with intuitive feedback on humidity status, allowing them to know whether the rice storage environment is safe without relying on electronic devices, making it easy to operate. The reversible color-changing property allows the indicator to be reused and adapt to dynamic changes in humidity.

[0033] Secondly, the present invention provides a rice packaging system with moisture-proof function, including a pretreatment unit, a packaging forming unit, a sealing unit, a humidity monitoring unit and a moisture-proof control unit;

[0034] The pretreatment unit includes a low-temperature drying device and a moisture detection device, which are used to perform moisture-proof pretreatment on rice, reduce the initial moisture content of rice, and verify that the moisture content meets the standards.

[0035] The packaging forming unit includes a composite film preparation device and a bag making device, used to prepare a packaging body with a composite moisture-proof layer, the composite moisture-proof layer having dual functions of moisture absorption and barrier;

[0036] The sealing unit includes a heat sealing device and a sealing strip bonding device, which are used to seal and encapsulate the packaging body containing rice to form a closed packaging space.

[0037] The humidity monitoring unit is installed inside the sealed packaging space and includes a miniature humidity sensor and a data transmission module for real-time collection of humidity data inside the sealed packaging space.

[0038] The moisture control unit is communicatively connected to the humidity monitoring unit and includes a moisture absorption module, a moisture regulation module, and a control chip. It is used to activate a preset moisture control mechanism based on the humidity data to maintain the humidity in the sealed packaging space within a preset range.

[0039] Thirdly, the present invention provides a computer device including a memory and a processor, the memory storing code, and the processor being configured to acquire the code and execute the above-described method for packaging rice with moisture-proof function.

[0040] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for packaging rice with moisture-proof function.

[0041] The technical solution of the present invention has the following advantages over the prior art:

[0042] This invention achieves comprehensive and multi-layered moisture-proof preservation of rice by constructing a closed-loop moisture-proof system consisting of moisture-proof pretreatment, composite moisture-proof layer setting, sealing and encapsulation, real-time humidity monitoring, and dynamic moisture-proof control. First, moisture-proof pretreatment reduces the initial moisture content of the rice at the source, decreasing its moisture absorption potential. Then, a composite moisture-proof layer with both moisture absorption and barrier functions forms an internal and external protective barrier. Combined with sealing and encapsulation, this blocks the intrusion of external moisture. Simultaneously, a humidity monitoring unit captures real-time humidity changes within the sealed space, and the linked moisture-proof control mechanism precisely maintains the humidity within a preset safe range, effectively preventing rice from drying out due to moisture. This method avoids problems such as mold, clumping, and insect infestation caused by excessively high humidity, while preventing excessive water loss and deterioration in taste caused by excessively low humidity. It significantly extends the shelf life of rice while preserving its nutritional components and edible quality to the maximum extent. This method does not rely on a single moisture-proofing method. It achieves active and dynamic moisture-proofing through the coordinated operation of each step. It can adapt to the environmental humidity differences in different regions and seasons. It solves the technical pain points of traditional rice packaging, such as limited moisture-proofing effect, lack of dynamic adjustment capability, and inability to cope with complex storage environments. Moreover, the operation process is simple and controllable, highly practical, and suitable for large-scale rice packaging production and daily storage scenarios. Attached Figure Description

[0043] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0044] Figure 1This is a schematic flowchart illustrating a moisture-proof rice packaging method according to an embodiment of the present invention.

[0045] Figure 2 This is a schematic diagram of the modular framework of a rice packaging system with moisture-proof function according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the composition of a computing device according to an embodiment of the present invention. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] The present invention will be further described in detail below with reference to the accompanying drawings.

[0049] Reference Figure 1 In a first aspect, the present invention provides a method for packaging rice with moisture-proof function, comprising the following steps:

[0050] Pre-treating rice to prevent moisture loss reduces its initial moisture content.

[0051] A composite moisture-proof layer is provided on the inside of the packaging body, which has the dual functions of moisture absorption and barrier.

[0052] The pre-treated rice is packed into the packaging body, and the packaging body is sealed to form a closed packaging space.

[0053] A humidity monitoring unit is installed inside the sealed packaging space to collect humidity data in the sealed packaging space in real time.

[0054] Based on the humidity data, a preset moisture control mechanism is activated to maintain the humidity within the sealed packaging space within a preset range.

[0055] In practice, the rice is first pre-treated to reduce its initial moisture content, thus minimizing the basis for moisture absorption. A composite moisture-proof layer with both moisture absorption and barrier functions is then installed on the inside of the packaging body, forming a double protective barrier. After the pre-treated rice is packed into the packaging body, a sealed packaging space is constructed through a sealing process to block the intrusion of external moisture. A humidity monitoring unit is deployed within the sealed packaging space to continuously collect internal humidity data. Based on the collected humidity data, a preset moisture-proof control mechanism is activated to maintain the humidity within the sealed space within a preset safe range through moisture absorption or humidification actions, achieving full-process moisture-proof control.

[0056] This invention constructs a closed-loop moisture-proof system encompassing pretreatment, protection, sealing, monitoring, and regulation. It overcomes the limitations of traditional single moisture-proof methods, achieving comprehensive and dynamic moisture management of the rice storage environment. This system reduces the rice's own moisture absorption potential at the source, blocks external moisture intrusion through a composite moisture-proof layer and sealing design, and adapts to changes in environmental humidity via humidity monitoring and regulation mechanisms. This effectively prevents rice from becoming moldy, clumping, infested with insects, or experiencing excessive water loss and a deterioration in taste, significantly extending the shelf life of rice and maximizing the preservation of its nutritional and edible quality. Furthermore, this method is adaptable to complex storage environments in different regions and seasons, making it highly practical and widely applicable to large-scale rice packaging production.

[0057] In some embodiments, the moisture-proof pretreatment of rice specifically includes:

[0058] Place the rice in a low-temperature drying device and dry it for 4-6 hours at 35-45℃ and 20-30% relative humidity.

[0059] After drying, the moisture content of the rice was measured using an infrared moisture meter to ensure that the moisture content of the rice was ≤13.5%.

[0060] If the moisture content exceeds the standard, return to the drying step and extend the drying time by 1-2 hours until the moisture content requirement is met.

[0061] Low-temperature drying avoids starch gelatinization and deterioration of taste caused by high-temperature processing, while precisely controlling moisture content within a safe range, reducing the rice's own moisture absorption potential from the source. The use of an infrared moisture meter enables rapid and accurate moisture detection, ensuring that the pretreatment effect meets standards.

[0062] It should be noted that the rice to be packaged is placed in a low-temperature drying device and dried for 4-6 hours in a mild environment of 35-45℃ and 20-30% relative humidity. The low temperature environment prevents damage to the quality of the rice and slowly reduces the moisture content. After drying, the rice is tested with an infrared moisture meter to ensure that the moisture content of the rice meets the safety standard of ≤13.5%. If the test result shows that the moisture content exceeds the standard, the drying process is repeated and the drying time is extended by 1-2 hours until the moisture content of the rice meets the preset requirements, thus completing the moisture-proof pretreatment.

[0063] This invention employs a low-temperature drying process, avoiding problems such as starch gelatinization and deterioration in taste caused by high-temperature processing, thus ensuring the original edible quality of the rice. Precise sampling and testing using an infrared moisture analyzer ensure that the moisture content of the pre-treated rice strictly meets standards, cutting off the path of moisture absorption and spoilage caused by excessive initial moisture. A flexible drying time adjustment mechanism further enhances the reliability of the pre-treatment, laying a solid foundation for subsequent moisture-proofing. Furthermore, this pre-treatment process is simple to operate and adaptable to the needs of large-scale production.

[0064] In some embodiments, the composite moisture-proof layer comprises, from the outside to the inside, a barrier layer, a moisture-absorbing layer, and an inner lining layer. The barrier layer is made of high-density polyethylene (HDPE) film with a thickness of 20-30 μm; the moisture-absorbing layer is made of modified bentonite / non-woven fabric composite material, wherein the modified bentonite accounts for 30-40% by mass and has a thickness of 15-25 μm; the inner lining layer is made of food-grade polypropylene (PP) film with a thickness of 10-15 μm. The three-layer structure is composited by hot melt adhesive at a composite temperature of 120-140℃.

[0065] The barrier layer uses HDPE film, leveraging its excellent moisture-blocking properties to prevent moisture from entering the environment. The absorbent layer uses a modified bentonite / non-woven fabric composite material. After sodium treatment, the modified bentonite has increased interlayer porosity, significantly improving its moisture absorption capacity, while the non-woven fabric substrate ensures uniform moisture absorption and structural stability. The inner lining layer uses food-grade PP film to ensure safety in direct contact with rice, while also providing some breathability for easy humidity control. This three-layer composite structure achieves dual protection of "external barrier and internal absorption," providing a more durable and stable moisture-proof effect compared to single moisture-proof materials.

[0066] It should be noted that the composite moisture-proof layer adopts a three-layer composite structure, consisting of a barrier layer, a moisture-absorbing layer, and an inner lining layer from the outside to the inside. The barrier layer is made of high-density polyethylene film, prepared by blow molding, with a thickness controlled at 20-30μm, providing excellent moisture barrier properties. The moisture-absorbing layer uses polypropylene non-woven fabric as the base material, mixed with 30-40% modified bentonite powder by mass, and is hot-pressed to form a 15-25μm thick functional layer, utilizing the high moisture absorption properties of modified bentonite to adsorb internal moisture. The inner lining layer uses food-grade polypropylene film, prepared by casting, with a thickness of 10-15μm, ensuring safety in direct contact with rice. The three layers are composited with food-grade hot melt adhesive at 120-140℃ to form an integrated composite moisture-proof layer.

[0067] The three-layer composite structure achieves a dual moisture-proof function of "external barrier and internal absorption." The barrier layer effectively blocks the intrusion of external moisture, the moisture-absorbing layer efficiently absorbs residual or slightly seeping moisture from inside the packaging, and the inner lining layer ensures food safety. Compared with traditional single moisture-proof materials, the moisture-proof effect is more durable and stable. The thickness and ratio of each layer are precisely designed to ensure moisture-proof performance while also taking into account the flexibility and lightweight of the packaging, facilitating transportation and storage. Using food-grade materials and environmentally friendly composite processes, there is no release of harmful substances, which meets food safety standards. At the same time, it improves the comprehensive utilization rate of packaging materials and has greater environmental advantages.

[0068] In some embodiments, sealing the packaging body specifically includes:

[0069] The packaging body is circumferentially sealed using a heat-sealing process. The heat-sealing temperature is 160-180℃, the heat-sealing pressure is 0.3-0.5MPa, and the heat-sealing time is 2-3 seconds.

[0070] An annular elastic sealing strip is added to the inside of the heat-sealing area. The sealing strip is made of food-grade silicone with a Shore hardness of 50-60A, a width of 5-8mm, and an overlap of ≥95% with the heat-sealing edge.

[0071] The dual sealing design, combining heat sealing and elastic sealing strips, effectively enhances the packaging's airtightness, preventing external moisture from entering through the seal. The food-grade silicone sealing strips possess excellent elasticity and aging resistance, maintaining their sealing performance even when subjected to compression or temperature changes during transportation.

[0072] It should be noted that the heat-sealing process is used to circumferentially seal the opening of the packaging body. By setting a heat-sealing temperature of 160-180℃, a heat-sealing pressure of 0.3-0.5MPa, and a heat-sealing time of 2-3 seconds, the opening of the packaging is tightly sealed. An annular elastic sealing strip is pre-installed inside the heat-sealing area. This sealing strip is made of food-grade silicone with a Shore hardness of 50-60A, has a width of 5-8mm, and an overlap of ≥95% with the heat-sealing edge. During the heat-sealing process, the sealing strip and the heat-sealing edge are tightly integrated to form a double sealing structure.

[0073] The synergistic effect of heat sealing and elastic sealing strips significantly improves the sealing performance of packaging, effectively blocking external moisture from entering through the sealed gaps and solving the problem of incomplete sealing that exists in traditional heat sealing alone. The food-grade silicone sealing strip has good elasticity and aging resistance, and can maintain stable sealing performance under complex environments such as compression and temperature changes during transportation, thus extending the sealing shelf life of the packaging. The precise setting of sealing parameters and the structural design of the sealing strip ensure the repeatability and stability of the sealing process, making it suitable for the quality control requirements of large-scale production.

[0074] In some embodiments, the humidity monitoring unit includes a miniature humidity sensor and a low-power data transmission module. The miniature humidity sensor has a measurement range of 0-100%RH, a measurement accuracy of ±2%RH, and a response time of ≤8 seconds. The data transmission module uses Bluetooth Low Energy (BLE) 5.0 technology or NFC technology to transmit humidity data in real time to an external terminal or a control trigger module built into the packaging.

[0075] Miniature humidity sensors are small in size and low in power consumption, and can be embedded inside packaging without affecting rice storage. The application of BLE5.0 or NFC technology enables wireless transmission of humidity data, allowing users to view the humidity status inside the packaging in real time via mobile phones and other terminals, solving the problem that traditional packaging cannot monitor humidity.

[0076] It should be noted that the humidity monitoring unit consists of a miniature humidity sensor and a low-power data transmission module. The miniature humidity sensor has a measurement range of 0-100%RH, a measurement accuracy of ±2%RH, and a response time of ≤8 seconds, enabling it to quickly and accurately collect humidity data within the sealed packaging space. The data transmission module uses Bluetooth Low Energy 5.0 or NFC technology to transmit the humidity data collected by the sensor to an external terminal or the control trigger module built into the packaging in real time, achieving real-time feedback of humidity data.

[0077] The miniature humidity sensor is small in size and low in power consumption, allowing it to be embedded inside packaging without affecting rice storage. Its high precision and fast response characteristics ensure the accuracy and real-time nature of humidity data. The low-power data transmission module enables wireless transmission of humidity data, allowing users to conveniently view the humidity status inside the packaging via mobile phones and other terminals, solving the blind spot problem of traditional packaging not being able to know the internal humidity. This monitoring unit provides accurate data support for subsequent moisture control mechanisms, making dynamic moisture control adjustments more targeted. At the same time, the low-power design ensures the long-term operation of the monitoring unit, and the battery life meets the requirements of the normal storage cycle of rice.

[0078] In some embodiments, the moisture control mechanism specifically includes:

[0079] The preset humidity threshold range is 40-60%RH, with a warning threshold of 60%RH and a lower limit threshold of 40%RH.

[0080] When the humidity data is greater than or equal to the warning threshold, the built-in moisture-absorbing module is activated. The moisture-absorbing module is a replaceable superabsorbent polymer (SAP) bag, which is connected to the sealed packaging space through a breathable membrane with a pore size of 50-100μm. The moisture absorption capacity of a single SAP bag is greater than or equal to 300% of its own weight.

[0081] When the humidity data is ≤ the lower limit threshold, the moisture absorption module is turned off; if the humidity is below 30%RH for 24 hours, the micro-humidification regulation is activated, releasing a preset amount of water vapor through the breathable micropores of the inner lining to prevent the rice from losing too much water and causing a deterioration in taste.

[0082] The preset humidity range of 40-60%RH is the optimal humidity range for rice storage, preventing both moisture absorption and mold growth while avoiding excessive water loss. The replaceable SAP moisture-absorbing module has a large moisture absorption capacity and high safety; users can replace it according to humidity data prompts, extending the moisture-proof life of the packaging. The micro-humidity regulation function is achieved through the breathable micropores in the inner lining layer. The amount of moisture released can be precisely controlled by the pore size and number, ensuring that the rice is always in the optimal storage humidity environment.

[0083] It should be noted that the preset humidity threshold range of 40-60%RH is the optimal humidity threshold range for rice storage, where 60%RH is the warning threshold and 40%RH is the lower limit threshold. The humidity data collected by the humidity monitoring unit is transmitted to the control module in real time. When the humidity data is greater than or equal to the warning threshold, the control module activates the built-in moisture-absorbing module. This moisture-absorbing module is a replaceable super absorbent resin pack that connects to the sealed space through a breathable membrane with a pore size of 50-100μm, quickly absorbing internal moisture. When the humidity data is less than or equal to the lower limit threshold, the control module shuts off the moisture-absorbing module. If the humidity remains below 30%RH for 24 hours, the control module activates micro-humidification regulation, releasing a preset amount of moisture through the breathable micropores of the inner lining to maintain the humidity within a reasonable range.

[0084] This invention achieves dynamic and precise humidity regulation through a preset humidity threshold and a graded control mechanism, ensuring that the humidity inside the packaging is always maintained within the optimal range for rice storage. This avoids problems such as mold and clumping caused by excessive humidity, while also preventing excessive water loss and deterioration in taste caused by excessively low humidity. The replaceable super absorbent resin bag has a large moisture absorption capacity (≥300% of its own weight) and is easy to replace, extending the overall moisture-proof life of the packaging. The micro-humidification function is achieved through the breathable micropores in the inner lining layer, allowing for precise and controllable moisture release, further ensuring the edible quality of the rice. This control mechanism adapts to different environmental humidity changes, improving the environmental adaptability of the packaging.

[0085] In some embodiments, a visual humidity indicator area is provided on the outer surface of the packaging body. The humidity indicator area uses a reversible color-changing humidity indicator. The indicator uses agar as a carrier to load cobalt chloride. When the humidity in the sealed space is 40-60%RH, it is blue; when it is ≥60%RH, it is pink; and when it is ≤40%RH, it is dark blue. The color change response time is ≤10 minutes.

[0086] The visual humidity indicator provides users with intuitive feedback on humidity status, allowing them to know whether the rice storage environment is safe without relying on electronic devices, making it easy to operate. The reversible color-changing property allows the indicator to be reused and adapt to dynamic changes in humidity.

[0087] It should be noted that a visual humidity indicator area is set on the outer surface of the packaging body. This indicator area uses a reversible color-changing humidity indicator with cobalt chloride loaded on agar as a carrier. When the humidity in the sealed packaging space is within the optimal range of 40-60%RH, the indicator is blue; when the humidity is ≥60%RH, the indicator turns pink; and when the humidity is ≤40%RH, the indicator is dark blue. The response time of the color change is ≤10 minutes, which provides intuitive feedback on the internal humidity status through color change.

[0088] The visual humidity indicator provides users with an intuitive way to receive humidity feedback without relying on electronic devices. Users can quickly determine whether the rice storage environment is safe by observing color changes with the naked eye. The operation is convenient and lowers the barrier to entry. The reversible color-changing characteristic allows the indicator to respond repeatedly to humidity changes, adapting to the humidity monitoring needs throughout the entire storage cycle without frequent replacements. The fast response time of the color change can promptly report humidity anomalies, allowing users to take timely measures such as replacing the desiccant module, further ensuring the safety of rice storage and improving the user experience.

[0089] Reference Figure 2 Secondly, the present invention provides a rice packaging system with moisture-proof function, including a pretreatment unit, a packaging forming unit, a sealing unit, a humidity monitoring unit and a moisture-proof control unit;

[0090] The pretreatment unit includes a low-temperature drying device and a moisture detection device, which are used to perform moisture-proof pretreatment on rice, reduce the initial moisture content of rice, and verify that the moisture content meets the standards.

[0091] The packaging forming unit includes a composite film preparation device and a bag making device, used to prepare a packaging body with a composite moisture-proof layer, the composite moisture-proof layer having dual functions of moisture absorption and barrier;

[0092] The sealing unit includes a heat sealing device and a sealing strip bonding device, which are used to seal and encapsulate the packaging body containing rice to form a closed packaging space.

[0093] The humidity monitoring unit is installed inside the sealed packaging space and includes a miniature humidity sensor and a data transmission module for real-time collection of humidity data inside the sealed packaging space.

[0094] The moisture control unit is communicatively connected to the humidity monitoring unit and includes a moisture absorption module, a moisture regulation module, and a control chip. It is used to activate a preset moisture control mechanism based on the humidity data to maintain the humidity in the sealed packaging space within a preset range.

[0095] It should be noted that the system of the present invention is composed of a pretreatment unit, a packaging forming unit, a sealing unit, a humidity monitoring unit, and a moisture control unit working together. The pretreatment unit dries the rice using a low-temperature drying device, and then verifies that the moisture content meets the standards using a moisture detection device. The packaging forming unit prepares a three-layer composite moisture-proof film using a composite film preparation device, and then forms the packaging body using a bag-making device. The sealing unit double-seals the packaging body containing the rice using a heat-sealing device and a sealing strip bonding device to form a sealed packaging space. The humidity monitoring unit has a built-in miniature humidity sensor and a data transmission module to collect humidity data in the sealed space in real time. The moisture control unit is communicatively connected to the humidity monitoring unit, receives humidity data through a control chip, and activates the moisture absorption module or the moisture regulation module to maintain the humidity within a preset range.

[0096] The system of this invention features clearly defined functions and coordinated operation among its various units, constructing a fully automated moisture-proof system from rice pretreatment to packaging, sealing, monitoring, and control. This significantly improves the production efficiency of rice packaging and meets the needs of large-scale industrial production. The equipment selection and parameter design of each unit are well-matched, ensuring the stability and reliability of the moisture-proof effect and preventing a decline in overall moisture-proof function due to the failure of a single link. The modular system design facilitates later maintenance and upgrades, and the parameters of each unit can be adjusted according to actual production needs, offering strong scalability. At the same time, the system operation process can be precisely controlled, reducing human error and ensuring the consistency of product quality.

[0097] Reference Figure 3 Thirdly, the present invention provides a computer device comprising a memory and a processor. The memory stores code, and the processor is configured to acquire the code and execute the aforementioned rice packaging method with moisture-proof function. The present invention achieves automated and intelligent control of the rice moisture-proof packaging process through the computer device. The processor's precise scheduling of various devices improves production efficiency and reduces human operation costs and errors. The memory's code storage function facilitates iterative updates to the packaging method, allowing for adaptation to rice packaging of different specifications and storage requirements by modifying parameters in the code, thus offering high flexibility. The computing power of the computer device ensures real-time analysis of humidity data and rapid response to control commands, improving the timeliness and accuracy of moisture-proof control, further guaranteeing the moisture-proof effect and product quality of the rice packaging, while also providing convenience for the traceability and management of production data.

[0098] In some embodiments, the rice packaging method with moisture-proof function in the above embodiments can be implemented by a computer device, which includes at least one processor, a communication bus, a memory, and at least one communication interface.

[0099] A processor can be a general-purpose central processing unit (CPU) or an application-specific integrated circuit (ASIC).

[0100] A communication bus can be used to transmit information between the aforementioned components.

[0101] The memory can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, universal optical discs, Blu-ray discs, etc.), magnetic disks or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. The memory can exist independently and be connected to the processor via a communication bus. The memory can also be integrated with the processor.

[0102] The memory stores program code for executing the present invention, and its execution is controlled by a processor. The processor executes the program code stored in the memory. The program code may include one or more software modules. The rice packaging method with moisture-proof function in the above embodiments can be implemented by a processor and one or more software modules in the program code in the memory.

[0103] A communication interface is a device that uses any transceiver or similar device to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0104] In a specific implementation, as one example, a computer device may include multiple processors, each of which may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. Here, a processor may refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0105] The aforementioned computer device can be a general-purpose computer device or a special-purpose computer device. In specific implementations, the computer device can be a desktop computer, a portable computer, a network server, a handheld digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, or an embedded device. This embodiment of the invention does not limit the type of computer device.

[0106] Fourthly, this invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned rice packaging method with moisture-proof function. The computer-readable storage medium provides a stable storage medium for the rice packaging method with moisture-proof function, facilitating its dissemination, deployment, and application. It can be quickly adapted to different computer devices or industrial control systems, exhibiting strong portability. The execution of the computer program in the storage medium does not rely on complex hardware upgrades, reducing the cost of technology implementation. By solidifying the steps and parameters of the packaging method through the program, the consistency and standardization of the packaging process under different scenarios are ensured, avoiding the problem of unstable moisture-proof effect caused by operational deviations. Simultaneously, it facilitates the batch deployment and unified maintenance of the packaging method, improving the efficiency of technology promotion.

[0107] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0108] refer to Figure 1 The figure is an exemplary flowchart of a method for packaging rice with moisture-proof function according to some embodiments of the present invention. The method mainly includes the following steps:

[0109] In step S101, the rice undergoes a moisture-proof pretreatment.

[0110] During specific implementation, the rice to be packaged is fed into a low-temperature drying equipment (model: CT-C-1, volume 100L), the drying temperature is set at 40°C, the environmental relative humidity is 25%, and the drying time is 5 hours. During the drying process, the rice is evenly stirred by a built-in stirring device (rotation speed 40r / min) of the equipment to ensure drying consistency. After drying, a random sampling test is carried out on the rice using an infrared moisture meter (model: SFY-60E). The sampling quantity is 3 - 5 samples per batch, the mass of each sample is 5g, and the average value of the test results is taken. If the average moisture content ≤ 13.5%, the pretreatment is qualified; if it exceeds the standard, the drying time is extended by 1.5 hours and the test is carried out again until it meets the standard.

[0111] In step S102, a packaging body with a composite moisture-proof layer is prepared.

[0112] During specific implementation, the preparation process of the composite moisture-proof layer is as follows:

[0113] Barrier layer preparation: High-density polyethylene (HDPE, model: 5000S) is blow-molded through a blow molding machine, the film thickness is controlled at 25μm, and the blow molding temperature is 180 - 200°C;

[0114] Moisture absorption layer preparation: Sodium-modified bentonite powder (particle size 200 mesh) is mixed with a polypropylene non-woven fabric substrate, the mass ratio of the modified bentonite is 35%, and it is hot-pressed and compounded through a hot press. The hot pressing temperature is 130°C, the pressure is 0.2MPa, and the time is 30 seconds to form a moisture absorption layer with a thickness of 20μm;

[0115] Inner lining layer preparation: Food-grade polypropylene (PP, model: T30S) is cast through a casting machine, the film thickness is controlled at 12μm, and the casting temperature is 220 - 240°C;

[0116] Three-layer compounding: The barrier layer, the moisture absorption layer, and the inner lining layer are compounded through a compounding machine. The compounding temperature is 130°C, food-grade hot melt adhesive (model: EVA-28) is used as the binder, the glue coating amount is 8g / m², and a composite moisture-proof film is obtained after compounding.

[0117] The composite moisture-proof film is made into a three-side sealed packaging body through a bag-making machine (model: DZD-400). The size of the packaging body is 30cm × 40cm, the capacity is 5kg, and during the bag-making process, it is ensured that the inner lining layer of the composite moisture-proof layer faces the inside of the packaging.

[0118] In step S103, the packaging body is hermetically sealed.

[0119] In practice, pre-treated rice is loaded into the prepared packaging body at a rate of 5 kg, ensuring that the rice does not exceed 80% of the packaging body's capacity, leaving sufficient buffer space. Then, the open end of the packaging body is fed into a heat-sealing machine (model: FS-600), with the heat-sealing temperature set to 170℃, the heat-sealing pressure to 0.4 MPa, and the heat-sealing time to 2.5 seconds. The open end is then circumferentially heat-sealed to form a heat-sealed edge (10 mm wide). Before heat-sealing, a food-grade silicone sealing strip (Shore hardness 55A, width 6 mm) is applied to the inside of the heat-sealing area, ensuring that the overlap between the sealing strip and the heat-sealed edge is ≥95%. After heat-sealing, the sealing strip and the heat-sealed edge are tightly adhered, achieving a double seal.

[0120] In step S104, a humidity monitoring unit is installed and humidity data is collected.

[0121] In practice, a miniature humidity sensor (model: SHT30) and a BLE5.0 data transmission module (model: nRF52832) are integrated and packaged into a humidity monitoring unit (size: 10mm×10mm×3mm). This unit is fixed to the top inside the packaging body using food-grade double-sided adhesive to avoid direct contact with the rice. The humidity monitoring unit has a built-in button battery (model: CR2032, capacity: 220mAh), providing a battery life of ≥1 year. After activation, the monitoring unit collects humidity data within the sealed packaging space every 5 minutes. The collected data is transmitted in real-time to the control chip (model: STM32F103) via the BLE5.0 module. Simultaneously, the real-time humidity can be viewed via a mobile app (supporting iOS and Android systems).

[0122] In step S105, the moisture control mechanism is activated based on the humidity data.

[0123] In practice, the control chip has a preset humidity threshold range of 40-60%RH, a warning threshold of 60%RH, and a lower limit threshold of 40%. When the humidity data is ≥60%RH, the control chip triggers the moisture absorption module to start. The moisture absorption module is a replaceable superabsorbent polymer (SAP, model: SAP-800) package, with a single SAP package weighing 10g and a moisture absorption capacity of ≥30g. It is connected to the sealed space through a polytetrafluoroethylene breathable membrane with a pore size of 80μm, quickly absorbing internal moisture. When the humidity data drops to the 40-60%RH range, the moisture absorption module is turned off. When the humidity data is ≤40%RH, if it remains below 30%RH for 24 hours, the control chip activates the moisture regulation module, releasing a small amount of moisture through the preset breathable micropores (pore size 5μm, number 100 / cm²) in the inner liner. The moisture comes from the environmental moisture absorbed during packaging preparation, and the release amount is precisely controlled through the microporous structure, causing the humidity to rise back to above 40%.

[0124] Meanwhile, the humidity indicator area on the outer surface of the packaging body is made of agar-loaded cobalt chloride, with a thickness of 2mm and an area of ​​2cm×2cm. It turns blue when the humidity is 40-60%RH, pink when it is ≥60%RH, and dark blue when it is ≤40%RH. Users can intuitively judge the humidity status by the color change. If the humidity indicator area remains pink for more than 24 hours, it prompts the user to replace the SAP moisture-absorbing module. Replacement is carried out through the pre-set replacement port (2cm in diameter, equipped with a sealing cap) on the side of the packaging body. After replacement, tighten the sealing cap to ensure airtightness.

[0125] refer to Figure 2 This figure is a schematic diagram of the structure of a moisture-proof rice packaging system according to some embodiments of the present invention. The system includes a pretreatment unit, a packaging forming unit, a sealing unit, a humidity monitoring unit, and a moisture control unit. These units work together to achieve the aforementioned packaging method. Specifically, the low-temperature drying equipment and moisture detection equipment in the pretreatment unit ensure that the initial moisture content of the rice meets the standards; the composite film preparation device and bag-making device in the packaging forming unit prepare the composite moisture-proof layer and the packaging body; the heat-sealing equipment and sealing strip bonding device in the sealing unit achieve double sealing; the humidity monitoring unit collects humidity data in real time; and the moisture control unit activates a moisture absorption or humidification mechanism based on the data to maintain stable humidity.

[0126] The technical solutions provided by the embodiments disclosed in this invention have the following beneficial effects:

[0127] Multiple moisture-proofing mechanisms work synergistically for long-lasting and stable results: This invention employs a closed-loop design—rice pretreatment, composite moisture-proof layer, sealed packaging, humidity monitoring, and dynamic regulation—to achieve comprehensive moisture protection from four dimensions: source control, barrier, adsorption, and regulation. Pretreatment reduces the initial moisture content of the rice, the composite moisture-proof layer achieves external barrier and internal adsorption, the sealed packaging blocks moisture channels, and dynamic regulation adapts to humidity changes. Compared to traditional single moisture-proofing methods, this provides a longer-lasting and more stable moisture-proofing effect, extending the shelf life of rice by 3-6 months.

[0128] Dynamic humidity regulation to adapt to diverse environments: This invention collects data in real time through a humidity monitoring unit and activates moisture absorption or moisturizing mechanisms according to preset thresholds, so that the humidity inside the packaging is always maintained within the optimal range of 40-60%RH. It can adapt to the environmental humidity differences in different regions and seasons, such as the rainy season in the south and the winter in the north. It not only prevents rice from absorbing moisture and becoming moldy, but also prevents excessive water loss from causing a deterioration in taste. It solves the technical pain point of traditional packaging being unable to dynamically adapt to the environment.

[0129] Visualized status and easy to use: The visual humidity indicator area on the outer surface of the packaging and the electronic data transmission function provide users with dual humidity status feedback. Users can know in real time whether the rice storage environment is safe through visual observation or mobile terminal. At the same time, the replaceable moisture-absorbing module facilitates user maintenance and improves ease of use.

[0130] Safe and environmentally friendly, quality guaranteed: All materials used in this invention are food-grade environmentally friendly materials, with no release of harmful substances, ensuring the safety of rice consumption; the design of the composite moisture-proof layer and moisture-absorbing module avoids the pollution problems that may be caused by traditional desiccants, and the replaceable structure improves the utilization rate of materials and is more in line with environmental protection requirements; at the same time, low-temperature pretreatment and dynamic humidity control can maximize the preservation of the nutritional components and taste quality of rice.

[0131] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for packaging rice with moisture-proof function, characterized in that, Includes the following steps: Pre-treating rice to prevent moisture loss reduces its initial moisture content. A composite moisture-proof layer is provided on the inside of the packaging body, which has the dual functions of moisture absorption and barrier. The pre-treated rice is packed into the packaging body, and the packaging body is sealed to form a closed packaging space. A humidity monitoring unit is installed inside the sealed packaging space to collect humidity data in the sealed packaging space in real time. Based on the humidity data, a preset moisture control mechanism is activated to maintain the humidity within the sealed packaging space within a preset range.

2. The rice packaging method with moisture-proof function according to claim 1, characterized in that: The specific steps of the moisture-proof pretreatment of rice include: Place the rice in a low-temperature drying device and dry it for 4-6 hours at 35-45℃ and 20-30% relative humidity. After drying, the moisture content of the rice was measured using an infrared moisture meter to ensure that the moisture content of the rice was ≤13.5%. If the moisture content exceeds the standard, return to the drying step and extend the drying time by 1-2 hours until the moisture content requirement is met.

3. The rice packaging method with moisture-proof function according to claim 1, characterized in that: The composite moisture-proof layer comprises, from the outside to the inside, a barrier layer, a moisture-absorbing layer, and an inner lining layer. The barrier layer is made of high-density polyethylene film with a thickness of 20-30 μm. The moisture-absorbing layer is made of modified bentonite / non-woven fabric composite material, wherein the modified bentonite accounts for 30-40% by mass and has a thickness of 15-25 μm. The inner lining layer is made of food-grade polypropylene film with a thickness of 10-15 μm. The three-layer structure is composited with hot melt adhesive at a composite temperature of 120-140℃.

4. The rice packaging method with moisture-proof function according to claim 1, characterized in that: The sealing and encapsulation of the packaging body specifically includes: The packaging body is circumferentially sealed using a heat-sealing process. The heat-sealing temperature is 160-180℃, the heat-sealing pressure is 0.3-0.5MPa, and the heat-sealing time is 2-3 seconds. An annular elastic sealing strip is added to the inside of the heat-sealing area. The sealing strip is made of food-grade silicone with a Shore hardness of 50-60A, a width of 5-8mm, and an overlap of ≥95% with the heat-sealing edge.

5. The method for packaging rice with moisture-proof function according to claim 1, characterized in that: The humidity monitoring unit includes a miniature humidity sensor and a low-power data transmission module. The miniature humidity sensor has a measurement range of 0-100%RH, a measurement accuracy of ±2%RH, and a response time of ≤8 seconds. The data transmission module uses Bluetooth Low Energy 5.0 or NFC technology to transmit humidity data in real time to an external terminal or a control trigger module built into the packaging.

6. The method for packaging rice with moisture-proof function according to claim 1, characterized in that: The moisture control mechanism specifically includes: The preset humidity threshold range is 40-60%RH, with a warning threshold of 60%RH and a lower limit threshold of 40%RH. When the humidity data is greater than or equal to the warning threshold, the built-in moisture-absorbing module is activated. The moisture-absorbing module is a replaceable super absorbent resin pack, which is connected to the sealed packaging space through a breathable membrane with a pore size of 50-100μm. The moisture absorption capacity of a single super absorbent resin pack is greater than or equal to 300% of its own weight. When the humidity data is ≤ the lower limit threshold, the moisture absorption module is turned off; if the humidity is below 30%RH for 24 hours, the micro-humidification regulation is activated, and a preset amount of water vapor is released through the breathable micropores of the inner lining.

7. The method for packaging rice with moisture-proof function according to claim 1, characterized in that: The outer surface of the packaging body is provided with a visual humidity indicator area. The humidity indicator area uses a reversible color-changing humidity indicator. The indicator uses agar as a carrier to load cobalt chloride. When the humidity in the sealed space is 40-60%RH, it is blue, ≥60%RH, pink, and ≤40%RH, dark blue. The color change response time is ≤10 minutes.

8. A rice packaging system with moisture-proof function, characterized in that, It includes a pretreatment unit, a packaging and forming unit, a sealing unit, a humidity monitoring unit, and a moisture control unit; The pretreatment unit includes a low-temperature drying device and a moisture detection device, which are used to perform moisture-proof pretreatment on rice, reduce the initial moisture content of rice, and verify that the moisture content meets the standards. The packaging forming unit includes a composite film preparation device and a bag making device, used to prepare a packaging body with a composite moisture-proof layer, the composite moisture-proof layer having dual functions of moisture absorption and barrier; The sealing unit includes a heat sealing device and a sealing strip bonding device, which are used to seal and encapsulate the packaging body containing rice to form a closed packaging space. The humidity monitoring unit is installed inside the sealed packaging space and includes a miniature humidity sensor and a data transmission module for real-time collection of humidity data inside the sealed packaging space. The moisture control unit is communicatively connected to the humidity monitoring unit and includes a moisture absorption module, a moisture regulation module, and a control chip. It is used to activate a preset moisture control mechanism based on the humidity data to maintain the humidity in the sealed packaging space within a preset range.

9. A computer device comprising a memory and a processor, the memory storing code, characterized in that, The processor is configured to acquire the code and execute the rice packaging method with moisture-proof function as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the rice packaging method with moisture-proof function as described in any one of claims 1 to 7.

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