Self-water-absorption ice bag

Abstract

The utility model belongs to the technical field of ice bags, and particularly relates to a self-water-absorption ice bag which comprises a bag body, a sheet-shaped porous material and a water absorbent, and one end of the bag body is open to form a bag opening; the sheet-shaped porous material is arranged on the inner side of a bag opening of the bag body, the bag body and the sheet-shaped porous material are matched to form a closed space, and the water absorbent is arranged in the closed space. According to the self-water-absorption ice bag, the water injection speed and the use convenience of the ice bag are greatly improved by means of the efficient permeability of the sheet-shaped material with the holes and the rapid adsorption capacity of the water absorbent, the sheet-shaped material with the holes is installed on the inner side of the opening of the bag body and is not prone to being adhered to other bag bodies in the low-temperature environment, and the water absorption efficiency of the ice bag is greatly improved. Therefore, the problem that the ice bag is torn and damaged due to interface bonding in the freezing or storage process is solved, and the safety and stability of the ice bag in the transportation and use links are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of ice pack technology, and in particular relates to a self-absorbing water ice pack. Background Technology

[0002] Ice packs, widely used in cold chain storage and transportation, medical care, food preservation, fresh produce logistics, and sports rehabilitation, directly impact product preservation, the effectiveness of medical care, and the reliability of logistics. With technological advancements and changing market demands, ice pack technology has undergone several iterations and improvements. While achieving some success, significant shortcomings remain in industrial applications. The specific technological evolution path and defect analysis are as follows:

[0003] The first-generation ice pack technology, also known as the basic self-absorbing ice pack, mainly consists of a bag body, a water inlet, and a water-absorbing agent placed inside the bag. In use, water is injected into the ice pack through the inlet. The water mixes with the water-absorbing agent to form a hydrogel, thereby achieving the function of absorbing and locking in water. After being frozen at low temperatures, it forms an ice pack. For example, Chinese patent CN209819960U discloses such a self-absorbing ice pack, including a bag body, a water inlet channel, and an absorbent strip. The bag body contains cold-retaining agent particles, which are high-molecular-weight water-absorbing materials. The front end of the water inlet channel protrudes outside the bag body, while the rest is inside. The absorbent strip is made of materials such as cotton, linen, silk, non-woven fabric, paper, or sponge that can automatically absorb water. The front end of the absorbent strip protrudes outside the top of the water inlet channel, while the rest passes through the water inlet channel to the bottom of the bag body and contacts the cold-retaining agent particles inside the bag. However, this technology has the following significant technical defects:

[0004] 1) Low water injection efficiency: The water injection process relies on manual operation. Manual water injection through a narrow intake port is slow, especially in large-scale industrial production, where the water injection efficiency is extremely low, leading to a surge in labor costs. The water injection time for a single bag often exceeds 30 seconds, seriously affecting production efficiency.

[0005] 2) Prone to leakage: Leakage is likely to occur at the connection between the water inlet and the bag body, as well as at the water inlet itself. This not only affects the effectiveness of the ice pack, but may also cause environmental pollution and damage to the product.

[0006] 3) Fiber breakage: For ice packs with absorbent strips, the absorbent strips are prone to fiber breakage after prolonged soaking, which reduces the water intake rate and further affects the cooling effect and service life of the ice pack.

[0007] The second-generation ice pack technology, also known as non-woven composite structure ice packs, employs an asymmetrical structure of non-woven fabric / plastic layer, with one side being non-woven fabric and the other side a plastic layer. This structure improves the water absorption and cooling effect of the ice pack to some extent, but it still has the following problems:

[0008] 1) Interface adhesion and tearing: In low-temperature environments, frost formation on the non-woven fabric surface can cause interface adhesion. If forcibly separated, the non-woven fabric's insufficient tensile strength can lead to tearing and leakage. This not only affects the effectiveness of the ice pack but may also cause contamination and damage to other items.

[0009] 2) Heat-sealed edges are prone to cracking: The heat-sealed edges of the plastic layer are prone to cracking under vibration during transportation, leading to leakage problems during transport. If the leaked ice packs stick to the items, it will further increase the risk of contamination.

[0010] The third-generation ice pack technology, also known as the improved composite structure ice pack, is an improvement on the second generation. It primarily reduces the area of ​​the non-woven fabric to decrease the probability of adhesion between ice packs. For example, Chinese patents with publication numbers CN118975886A, CN213599629U, and CN220771465U disclose a double-sided film-sealed non-woven fabric self-absorbing ice pack. However, this third-generation ice pack still has the following problems:

[0011] 1) Adhesion still exists: Although the reduction in non-woven fabric area reduces the probability of adhesion between ice packs, ice adhesion still exists in key contact areas (such as the central permeable surface), affecting the effectiveness and aesthetics of the ice packs.

[0012] 2) Micro-leakage problem: Stress concentration can easily occur at the interface of the permeable / waterproof layer under low-temperature shrinkage, leading to micro-leakage. This not only affects the cooling effect and service life of the ice pack, but may also cause contamination of items.

[0013] Fourth-generation ice pack technology, also known as microporous breathable ice packs, creates micron-level water-permeable channels in the plastic layer of the bag through laser / mechanical punching. This structure improves the water absorption speed and cooling effect of the ice pack to some extent, but it still has the following problems:

[0014] 1) Slow water absorption speed: Due to the limited number of micropores, the water absorption speed is relatively slow and cannot meet the needs of rapid cooling.

[0015] 2) Powder leakage and water seepage issues: Compared to natural materials, the micropores created by laser / mechanical punching have larger diameters, making them prone to powder leakage and water seepage during water absorption. This not only affects the effectiveness and lifespan of the ice pack but may also cause environmental pollution and damage to the product.

[0016] 3) Interface adhesion and bag rupture: Due to the large and uneven distribution of micropores, ice packs are prone to interface adhesion in low-temperature environments. Simultaneously, residual stress from laser or mechanical forces concentrates around the pores, creating weak points and reducing the material's tear resistance. Forcibly separating the ice pack can easily lead to rupture, further exacerbating the risk of leakage and contamination.

[0017] Therefore, existing ice pack technology still has significant shortcomings in terms of water injection speed, anti-sticking, anti-bursting, and anti-leakage. These problems limit the widespread application and development of ice pack technology. There is an urgent need for a new type of self-absorbing ice pack structure to solve the above-mentioned problems in the existing technology and improve the overall performance and use effect of ice packs. Utility Model Content

[0018] In view of this, the present invention aims to solve the technical problems of low water injection efficiency, easy leakage, and easy adhesion in existing ice pack technology. The present invention discloses a self-absorbing ice pack, which improves water injection efficiency and reduces the risk of leakage and adhesion by designing a self-absorbing ice pack comprising a bag body, a sheet-like perforated material, and a water-absorbing agent, and by installing the sheet-like perforated material on the inside of the open side of the bag body.

[0019] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0020] A self-absorbing water-cooling ice pack, comprising:

[0021] The bag body has an open end, forming the bag opening;

[0022] A sheet-like perforated material is disposed on the inside of the bag opening on the bag body, and the bag body and the sheet-like perforated material cooperate to form a closed space;

[0023] A water-absorbing agent is placed within the enclosed space.

[0024] Furthermore, the bag body includes a first bag film layer and a second bag film layer, and the first bag film layer and the second bag film layer form a bag opening on one side through a bag film heat-pressing part.

[0025] Furthermore, an adhesive structure is provided at the ends of the first and second bag film layers near the bag opening, the adhesive structure being used to bond and fix the port portions of the first and second bag film layers together.

[0026] Furthermore, a preset distance m is provided between the sheet-like perforated material and the end of the bag opening.

[0027] Furthermore, the bag body is rectangular, the bag opening is located at one end of the length direction of the bag body, the total length of the bag body is h, and the projection distance of the sheet-like perforated material in the length direction is n, where 0.1h≤n≤0.3h, 0≤m≤0.3h.

[0028] Furthermore, the sheet-like porous material is a single, integral porous material.

[0029] Furthermore, the sheet-like porous material is a single-layer porous material or a composite of multiple porous materials.

[0030] Furthermore, the sheet-like perforated material includes a first permeable sheet and a second permeable sheet arranged in a folded manner. One end of the first permeable sheet is connected to the first bag membrane layer, and one end of the second permeable sheet is connected to the second bag membrane layer. The other ends of the first permeable sheet and the second permeable sheet are connected at the fold or to other folded sheets.

[0031] Furthermore, the first permeable sheet includes an adhesive portion and a water-permeable portion, wherein the adhesive portion is bonded to the bag body.

[0032] Furthermore, the adhesive portion is arranged in a semi-enclosed shape on the outside of the water-passing portion.

[0033] Furthermore, the water-passing portion of the sheet-like porous material includes a water-permeable layer and an isolation layer. The water-permeable layer and the isolation layer are disposed in the same layer or are a double-layer composite structure. The water-permeable layer is made of a porous material, and the isolation layer is made of a non-porous material.

[0034] Compared with existing technologies, the self-absorbing ice pack of this invention has the following advantages:

[0035] 1. The self-absorbing ice pack of this utility model achieves rapid water absorption by using a sheet-like perforated material and forming a closed space with the bag body. It eliminates the need for slow manual injection through a narrow water inlet, greatly shortening the water injection time and improving production efficiency. The sheet-like perforated material is placed inside the open part of the bag body, and the resulting pore path will not cause water leakage under normal conditions. This reduces the interface adhesion caused by surface frost in low-temperature environments, and avoids bag tearing and leakage problems caused by adhesion.

[0036] 2. The self-absorbing ice pack of this utility model solves the problems of slow water absorption, powder leakage, water seepage and easy sticking of traditional ice packs. It has a clever structure, simplifies the use of ice packs, and improves the overall performance and effect of ice packs. Attached Figure Description

[0037] Figure 1 This is a perspective structural diagram of the self-absorbing ice pack described in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the self-absorbing ice pack at the bag opening in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the exploded structure of the self-absorbing ice pack described in this embodiment of the present invention;

[0040] Figure 4 This is a partial cross-sectional view of the self-absorbing ice pack described in this embodiment of the present invention when it has not absorbed water.

[0041] Figure 5 for Figure 4 The diagram shows the structure after absorbing water and cooling to make ice.

[0042] Figure 6 for Figure 4 The diagram shows a structure with an isolation piece installed on the bag opening side.

[0043] Figure 7 for Figure 4 The diagram shows a structure with an adhesive structure on the bag opening side.

[0044] Figure 8 This is a schematic diagram of the first structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the second structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0046] Figure 10 This is a schematic diagram of the third structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of the fourth structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0048] Figure 12 This is a schematic diagram of the fifth structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0049] Figure 13 This is a schematic diagram of the sixth structure of the water-passing section in the sheet-like porous material described in this embodiment of the present invention;

[0050] Figure 14 This is a schematic diagram of the structure of the permeable sheet in the sheet-like porous material described in this embodiment of the utility model;

[0051] The markings in the diagram are as follows:

[0052] 1-Bag body; 101-Bag opening; 102-First bag film layer; 103-Second bag film layer; 104-Closed space; 105-Bag film heat-pressing part; 106-Separation sheet; 107-Adhesive structure; 2-Sheet-shaped perforated material; 201-First permeable sheet; 202-Second permeable sheet; 203-Permeable layer; 204-Separation layer; 205-Adhesive part; 206-Water-passing part; 207-Composite layer; 2071-Water-passing hole; 3-Absorbent; 4-Ice cube. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0054] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0055] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0056] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0058] like Figures 1-6 As shown, this utility model discloses a self-absorbing water ice pack, including...

[0059] The bag body 1 has an open end, forming a bag opening 101;

[0060] A sheet-like perforated material 2 is disposed on the inner side of the bag opening 101 on the bag body 1, and the bag body 1 and the sheet-like perforated material 2 cooperate to form a closed space 104;

[0061] Water absorbent 3 is disposed within the enclosed space 104;

[0062] During water absorption, water from the outside of the bag 1 enters the enclosed space 104 through the sheet-like porous material 2 and reacts with the absorbent 3 to form a hydrogel.

[0063] This application discloses a self-absorbing ice pack, which mainly includes three core components: a bag body 1, a sheet-like perforated material 2, and a water-absorbing agent 3. The bag body 1 is made of a polymer material with good sealing and low-temperature resistance, which can maintain structural stability in low-temperature environments. The sheet-like perforated material 2 is installed on the inside of the opening of the bag body 1 and cooperates with the bag body 1 to form a closed space 104. External moisture can quickly penetrate into the area where the water-absorbing agent 3 is located through the pores of the material. After absorbing moisture, the water-absorbing agent 3 will quickly expand to form a hydrogel and lock in the moisture. The core improvement principle of the self-absorbing ice pack described in this application is that a sheet-like perforated material 2 is placed inside the open side of the bag body 1. Under normal conditions, the resulting pore path does not cause water leakage. Only when the ice pack is immersed in water or comes into direct contact with a water source will water enter the closed space where the absorbent 3 is located along the pore path and quickly combine with the absorbent 3 to form a gel. Subsequently, under low temperature conditions, the water molecules condense into ice cubes 4. It is precisely because of this clearly defined and complementary structural design that the self-absorbing ice pack does not require manual filling with a traditional narrow water inlet during use. During the water absorption process, no special manual operation is required from the external water source; simply immerse or contact the open part of the ice pack with water. This process enables automatic water absorption and gelation, locking in the moisture and ensuring stable formation during subsequent freezing. The entire process utilizes the permeability of the sheet-like porous material 2 and the strong adsorption capacity of the absorbent 3. The sheet-like porous material 2 not only allows water to pass through quickly but also maintains a certain physical isolation after water absorption, preventing adhesion between the bag and the gel layer. Meanwhile, the absorbent 3 does not easily flow or leak after absorbing water, keeping the entire ice pack structure stable. Through this process, the ice pack can form a stable hydrogel structure in a short time, providing sufficient moisture reserves for subsequent freezing, while also significantly simplifying the operation process and reducing the risk of human error.

[0064] The self-absorbing ice pack of this invention, thanks to the high permeability of the sheet-like porous material 2 and the rapid adsorption capacity of the absorbent 3, significantly improves the water filling speed and ease of use. Compared to traditional ice packs that require manual filling, this application allows for rapid water absorption by directly contacting the bag opening 101 with the water source. This not only simplifies the operation process but also avoids filling difficulties and leakage risks caused by narrow water inlets. Especially in industrial and commercial scenarios with large-scale production or frequent use, this self-absorbing function can significantly shorten the water filling time and improve efficiency. This improves production efficiency. Meanwhile, the sheet-like perforated material 2 is installed on the inside of the open side of the bag body 1, which is not easy to stick to other bag bodies 1 in low-temperature environments. This avoids the tearing and damage caused by interface adhesion during the freezing or storage of ice packs, greatly improving the safety and stability of ice packs during transportation and use. In addition, the absorbent 3 is firmly fixed in the closed space 104 and will not leak out with water when water is injected or moved, thus preventing powder leakage. This not only protects the refrigerated items from absorbent contamination, but also improves the overall safety and controllability of the ice pack. Furthermore, the polymer material used in the bag body 1 has excellent resistance to low-temperature impact and good sealing performance, ensuring that the ice pack can maintain its structural integrity after freezing and will not break or leak due to external impact or sudden changes in ambient temperature. This provides a reliable and continuous cooling effect for various application scenarios such as fresh food logistics, medical supplies transportation, and food preservation. It is also not prone to leakage, contamination, deformation, or damage during long-term storage and transportation. It is these improvements and optimizations that have enabled this utility model to achieve a comprehensive improvement in water injection efficiency, safety of use, and cooling performance, providing new ideas for the technological upgrading of the ice pack industry and bringing more convenient and efficient solutions for various transportation and storage occasions that require low-temperature protection.

[0065] As a preferred example of this application, the bag body 1 includes a first bag film layer 102 and a second bag film layer 103. The first bag film layer 102 and the second bag film layer 103 form a bag opening 101 with one side opening through a bag film hot pressing part 105. The sheet-like perforated material 2 includes a first permeable sheet 201 and a second permeable sheet 202 arranged in a folded manner. One end of the first permeable sheet 201 is connected to the first bag film layer 102, and one end of the second permeable sheet 202 is connected to the second bag film layer 103. The other ends of the first permeable sheet 201 and the second permeable sheet 202 are connected at the fold or connected to other folded sheets. In the example of this application, the bag body 1 is generally rectangular. The three ends of the bag body 1 are sealed together by a bag film heat-pressing part 105. A bag opening 101 is formed on one side along its length. A sheet-like perforated material 2 is then provided inside the bag opening 101, forming a closed space 104 inside the bag body 1 to accommodate the absorbent 3. The sheet-like perforated material 2 is designed as a folded structure comprising at least two permeable sheets, such as... Figure 3As shown, the first permeable sheet 201 and the second permeable sheet 202 are respectively. The first permeable sheet 201 and the second permeable sheet 202 are connected as one piece on the folded side, and the other side is sealed to the first bag film layer 102 and the second bag film layer 103 respectively. This ensures that when the bag body 1 is filled with water and its size increases, the sheet-like perforated material 2 can still be reliably sealed between the first bag film layer 102 and the second bag film layer 103. Preferably, the sheet-like perforated material 2 may also include multiple permeable sheets arranged in a folded manner, with one or more other folded sheets disposed between the first permeable sheet 201 and the second permeable sheet 202.

[0066] This application optimizes the structure of the bag body 1 and the sheet-like perforated material 2. By further designing the bag body 1 as a bag opening 101 formed by a first bag film layer 102 and a second bag film layer 103 connected by heat pressing on one side, the absorbent 3 can be placed inside the bag body 1 to form a closed space 104. The sheet-like perforated material 2 forms a folded structure by connecting the first permeable sheet 201 to the first bag film layer 102 and the second permeable sheet 202 to the second bag film layer 103. When external water comes into contact with the bag opening 101, it can quickly seep into the interior through the pores of the folded parts and undergo an adsorption and gelation reaction with the absorbent 3, thereby realizing automated water injection and rapid gelation. The adhesive function allows the first permeable sheet 201 and the second permeable sheet 202 to be connected at the fold or to other folded sheets during the process. This not only ensures that the sheet-like perforated material 2 can maintain a reliable seal and fit when the bag body 1 is filled with water and expands, but also effectively prevents water loss or leakage of absorbent due to the opening or deformation of the bag opening 101. In turn, the absorbed water is quickly condensed into ice cubes 4 in low-temperature environments, providing continuous and stable cooling conditions for various items that require low-temperature protection. At the same time, there is no need for the independent water inlet that is often set on traditional ice packs. Water absorption can be automatically completed simply by immersing or contacting the bag opening with a water source, which greatly simplifies the usage process and reduces the risk of leakage.

[0067] As a preferred example of this application, a preset distance m is provided between the sheet-like perforated material 2 and the end of the bag opening 101.

[0068] This application optimizes the speed and distribution of water flow by setting a preset distance m between the bag opening and the sheet-like porous material. When the external water source comes into contact with the bag opening, the water is slowed down and evenly distributed before entering the sheet-like porous material, effectively reducing the impact of the water flow on the sheet-like porous material and the absorbent. This allows the absorbent to come into more full contact with the water and absorb it evenly during the gelation process, thereby reducing the risk of expansion, deformation or breakage caused by excessive local water absorption or uneven distribution. In addition, the preset distance m also makes the bag opening more flexible in actual operation. Users do not need to worry too much about backflow or difficulty in filling water due to excessive water flow. They can simply touch or partially immerse the bag opening in the water source to complete the water absorption operation smoothly.

[0069] As a preferred example of this application, the bag body 1 is rectangular, the bag opening 101 is located at one end of the length direction of the bag body 1, the total length of the bag body 1 is h, and the projection distance of the sheet-like perforated material 2 in the length direction is n, wherein 0.1h≤n≤0.3h, 0.1h≤m≤0.3h. This setting, by limiting the projection distance n of the sheet-like perforated material and the positional relationship between the preset distance m between the bag opening end and the sheet-like perforated material and the total length of the bag body 1 under the condition that the total length of the bag body is h, shows higher water injection efficiency and better stability in practical applications. When n is between 0.1h and 0.3h, the sheet-like perforated material 2 can achieve a balance between efficient water permeability and wide coverage within a limited length range, without waste due to excessive material length or affecting the gelation effect due to excessive material length. Secondly, the preset distance m is also limited to the range of 0.1h to 0.3h, which effectively avoids direct water flow impact caused by the bag opening 101 being too close to the sheet-like perforated material 2, and also prevents water absorption lag or insufficient absorption due to excessive distance. This allows water to enter the pore structure of the sheet-like perforated material 2 under appropriate flow rate and pressure, so that the absorbent 3 can quickly form a gel and stably lock in water in a uniform moisture distribution environment. Furthermore, the bag body 1 is made of a polymer membrane material and sealed on three sides by heat pressing. One end of the bag opening 101 is left as a water injection and venting channel. This not only improves the tensile and tear resistance of the bag body 1, but also maintains good toughness and sealing performance when it expands in volume after absorbing water or shrinks in volume after freezing at low temperatures, making it less prone to breakage or leakage. This further ensures the safety and reliability of the ice pack during use. Moreover, since there is a clear distance limit between the bag opening 101 and the sheet-like perforated material 2, users do not need to worry about the bag body 1 breaking or the absorbent 3 overflowing due to improper operation or excessive water flow during actual operation, thus significantly improving the service life and reusability of the ice pack. In the examples of this application, m, n, and h are of the same dimension. In some examples of this application, the sheet-like perforated material 2 is located at the end of the bag opening 101, that is, m is approximately equal to 0.

[0070] As a preferred example of this application, such as Figure 7 As shown, an adhesive structure 107 is provided at the ends of the first bag film layer 102 and the second bag film layer 103 near the bag opening 101. The adhesive structure 107 is used to bond and fix the port portions of the first bag film layer 102 and the second bag film layer 103 together. As a preferred example of this application, the adhesive structure 107 is located near the middle of the bag opening 101, and its function is to firmly bond and fix a portion of the port portions of the first bag film layer 102 and the second bag film layer 103 together. During the manufacturing process of the self-absorbing ice pack, when the first bag film layer 102 and the second bag film layer 103 are heat-fused to form the bag body, an adhesive structure 107 is also formed at the end of the opening side forming the bag opening 101 through a heat-fusion process. This design not only allows water to easily enter the ice pack during the absorption process, but also ensures that the ends are sealed shut after ice making, effectively preventing water from accidentally leaking out during the ice making process. This ensures the smooth progress of the ice making process and prevents the ice pack from sticking together at the ends during storage, transportation, or use.

[0071] As a preferred example of this application, the sheet-like porous material 2 is an integral, fully porous material. In this example, the sheet-like porous material 2 can be selected from any one of fiber-based porous materials (such as non-woven fabrics), polymer porous materials (such as microporous polypropylene films), natural or bio-based porous materials. In this example, the sheet-like porous material 2 is selected from non-woven fabrics, cotton materials, and absorbent materials. This design, by designing the sheet-like porous material 2 as a single porous material, allows water to quickly enter the closed space 104 where the absorbent is located through multiple pore channels on the material surface and inside after contact with a water source. This enables the water to fully contact the absorbent 3 and complete the absorption and gelation process in the shortest possible time. This integrated porous material structure not only makes the diffusion path of water on the material surface and inside more unobstructed but also avoids flow hindrance that may occur between different materials or different pore size regions. Furthermore, at the production level, using a single type of perforated material can simplify the process flow, as it eliminates the need to process multiple different materials or layers simultaneously. This also reduces the complexity of raw material procurement and quality inspection, thereby lowering production costs and increasing overall capacity. This is more conducive to large-scale industrial manufacturing and also provides greater control over product quality.

[0072] As a preferred example of this application, such as Figure 14As shown, the first permeable sheet 201 includes an adhesive portion 205 and a water-passing portion 206, wherein the adhesive portion 205 is bonded to the bag body 1. As a specific example of this application, the adhesive portion 205 is semi-enclosed on the outside of the water-passing portion 206. The adhesive portions 205 at both ends of the first permeable sheet 201 in the width direction are connected to the bag film heat-pressed portion 105 on the bag body 1, and the adhesive portion 205 between these two ends is bonded to the first bag film layer 102. The second permeable sheet 202 has a similar structure to the first permeable sheet 201, and will not be described further here.

[0073] This design incorporates a permeable sheet with two parts: an adhesive part 205 and a water-passing part 206. The adhesive part 205 is used to bond tightly to the bag membrane layer, while the water-passing part 206 forms a channel structure for the first permeable sheet 201 to allow water to quickly penetrate into the enclosed space 104. This design enables the water-passing part 206 to function as an unobstructed water absorption channel during water injection, while the adhesive part 205 forms a reliable sealing area around it. When water enters the water-passing part 206, it quickly combines with the absorbent 3 to form a hydrogel, which then solidifies into ice cubes 4 under low temperature conditions. The entire process utilizes the stability of the adhesive part 205 and the high permeability of the water-passing part 206 to ensure that the absorbent 3 receives a uniform and sufficient supply of water in a short time, while also effectively preventing the absorbent 3 or water from leaking to the outside of the bag. In addition, the semi-enclosed adhesive part 205 can also provide some protection and fixation for the water-permeable part 206, avoiding the problems of edge lifting or water-permeable sheet falling off that may occur under the traditional simple bonding method.

[0074] As some examples of this application, the water-passing part 206 of the sheet-like porous material 2 includes a water-permeable layer 203 and an isolation layer 204. The water-permeable layer 203 and the isolation layer 204 are disposed in the same layer or are a double-layer composite structure. The water-permeable layer 203 is made of porous material and the isolation layer 204 is made of non-porous material.

[0075] This design incorporates a sheet-like structure in which the permeable portion 206 of the sheet-like porous material 2 is composed of a permeable layer 203 and an insulating layer 204. The permeable layer 203 and the insulating layer 204 can be a single-layer structure or a double-layer composite structure. Different design combinations can be used to meet different water absorption and structural reinforcement requirements. By adjusting the distribution of the permeable layer 203 and the insulating layer 204 in the sheet-like porous material 2 and the porosity of the material in different areas, water can be evenly distributed and stably absorbed during its entry into the closed space 104 of the ice pack.

[0076] In the examples of this application, such as Figure 8 As shown, it discloses a water-passing section 206 structure, wherein the middle part of the water-passing section 206 is an isolation layer 204 made of non-porous material, and the two sides are water-permeable layers 203 made of porous material. Figure 9As shown, another water passage section 206 structure is disclosed, in which the middle part of the water passage section 206 is a permeable layer 203 made of porous material, and the two sides are isolation layers 204 made of non-porous material.

[0077] This design utilizes a reasonable combination of different material properties in the middle and two sides. During the water absorption process, it ensures that water can quickly penetrate through the porous area into the internal absorbent 3 area to form a uniform hydrogel structure. On the other hand, the setting of non-porous areas effectively prevents the problem of excessive local absorbent load and structural stress concentration caused by excessive water penetration. This greatly reduces the risk of tearing, breaking or leaking of the ice pack due to external impact or sudden temperature changes during repeated use or long-distance transportation.

[0078] In the examples of this application, such as Figure 10 , Figure 11 As shown, two other structures for the water-passing section 206 are disclosed. The periphery of the water-passing section 206 is an isolation layer 204, and the central area of ​​the water-passing section 206 is a permeable layer 203. The permeable layer 203 can be designed in the form of a circle, triangle, rectangle, or other polygons. This design achieves an effective division of labor for water entry, absorption, and locking by rationally configuring the relative positions of the perforated and non-perforated areas. During use, the perforated material in the central area allows the absorbent 3 to fully contact the water, while the additional support and sealing provided by the non-perforated material on the periphery effectively reduces the risk of bag rupture and water leakage caused by external impact, low-temperature freezing heave, or uneven internal distribution. This structural design not only improves the working efficiency of the ice pack during the water absorption stage but also maintains the overall physical strength and impact resistance of the ice pack after freezing at low temperatures.

[0079] In the examples of this application, such as Figure 12 As shown, a fifth type of water-passing section 206 structure is disclosed. Multiple isolation layers 204 and permeable layers 203 are provided on the water-passing section 206, with the multiple isolation layers 204 and multiple permeable layers 203 arranged alternately. This alternating arrangement of multiple permeable layers 203 allows water to quickly penetrate and evenly diffuse inside the ice pack, enabling the absorbent 3 to fully react with the water to form a homogeneous hydrogel. The alternating isolation layers 204 restrict the free flow of water through a non-porous barrier effect, preventing uneven water absorption, incomplete gelation, or damage to the ice pack structure caused by excessive water flow. Simultaneously, it enhances the impact resistance and durability of the ice pack during repeated freeze-thaw cycles, transportation, and storage.

[0080] As examples of this application, the sheet-like porous material 2 is a single-layer porous material or a composite of multiple porous materials. In this application, the self-absorbing ice pack mainly relies on the sheet-like porous material 2 inside the bag body 1. This material can be a single-layer porous material or a composite of multiple porous materials. During use, external moisture is rapidly absorbed through the tiny pores on the surface of this material and evenly distributed within the enclosed space 104, fully contacting the absorbent 3 to form a hydrogel structure. When the sheet-like porous material 2 is a multi-layer composite structure, such as... Figure 13 As shown, taking the first permeable sheet 201 and the composite layer 207 as an example, the pore size of the permeable layer 203 on the first permeable sheet is smaller than the water passage pore 2071 on the composite layer 207. The design of the pore size difference between each composite layer allows each layer to effectively participate in the water absorption process. This not only ensures the rapid conduction and even distribution of water inside the ice pack, but also provides additional mechanical support to prevent the ice pack from deforming or breaking due to changes in internal pressure during water absorption and freezing.

[0081] As examples of this application, an isolation sheet 106 is provided on the inner side of the first bag film layer 102 and / or the second bag film layer 103. The isolation sheet 106 is located on the side of the sheet-like perforated material 2 near the opening end of the bag opening 101. By providing an isolation sheet 106 on the outer side of the sheet-like perforated material 2 at the bag opening 101, this application serves two purposes: firstly, it guides the flow of external water into the ice pack, ensuring that water permeates evenly into the enclosed space through the microporous structure of the sheet-like perforated material 2; secondly, it forms a complete or partial physical barrier at the bag opening 101 after water injection, further preventing the ice pack from sticking to other structures when it rapidly freezes into ice blocks 4 at low temperatures. Simultaneously, it provides additional mechanical support and structural reinforcement for the interior of the ice pack, effectively preventing the risk of bag deformation, rupture, or leakage caused by localized water concentration or uneven internal distribution.

[0082] This utility model discloses a self-absorbing ice pack. By placing a sheet-like perforated material 2 inside the open side of the bag body 1, forming a closed space 104 with the bag body 1, this design cleverly utilizes the permeability of the sheet-like perforated material 2. This allows external water to quickly permeate through the pores of the material to the area where the absorbent is located without manual intervention. The absorbent 3 rapidly expands after absorbing water to form a hydrogel, which then solidifies into ice at low temperatures. This process not only significantly simplifies the cumbersome steps of manually filling traditional ice packs but also effectively avoids filling difficulties and leakage risks caused by narrow water inlets. Simultaneously, the sheet-like perforated material 2 maintains a certain physical isolation after water absorption, preventing the bag body 1 from sticking to the gel layer. The absorbent 3 is firmly fixed within the closed space 104 and will not leak out with water during filling or movement, preventing powder leakage and protecting refrigerated items from contamination. In the example of this application, the absorbent is the material used in the prior art to form a hydrogel during ice pack preparation, which will not be described in detail here.

[0083] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A self-absorbing water-cooling ice pack, characterized in that, include: The bag body (1) has an open end, forming a bag opening (101). A sheet-like perforated material (2) is disposed on the inside of the bag opening (101) of the bag body (1), and the bag body (1) and the sheet-like perforated material (2) cooperate to form a closed space (104); wherein the sheet-like perforated material (2) is selected from any one of non-woven fabric and microporous polypropylene film; A water-absorbing agent (3) is disposed within the enclosed space (104).

2. The self-absorbing water ice pack according to claim 1, characterized in that, The bag body (1) includes a first bag film layer (102) and a second bag film layer (103), and the first bag film layer (102) and the second bag film layer (103) form a bag opening (101) with one side open through a bag film heat pressing part (105).

3. The self-absorbing ice pack according to claim 2, characterized in that, An adhesive structure (107) is provided at the ends of the first bag film layer (102) and the second bag film layer (103) near the bag opening (101). The adhesive structure (107) is used to bond and fix the port portions of the first bag film layer (102) and the second bag film layer (103).

4. The self-absorbing ice pack according to claim 1, characterized in that, A preset distance m is provided between the sheet-like perforated material (2) and the end of the bag opening (101).

5. The self-absorbing water ice pack according to claim 4, characterized in that, The bag body (1) is rectangular, and the bag opening (101) is located at one end of the length direction of the bag body (1). The total length of the bag body (1) is h, and the projection distance of the sheet-like perforated material (2) in the length direction is n, where 0.1h≤n≤0.3h and 0≤m≤0.3h.

6. The self-absorbing water ice pack according to claim 1, characterized in that, The sheet-like porous material (2) is an integral porous material, or the sheet-like porous material (2) is a single layer porous material or a composite of multiple porous materials.

7. The self-absorbing water ice pack according to claim 1, characterized in that, The sheet-like perforated material (2) includes a first permeable sheet (201) and a second permeable sheet (202) arranged in a folded manner. One end of the first permeable sheet (201) is connected to the first bag film layer (102), and one end of the second permeable sheet (202) is connected to the second bag film layer (103). The other ends of the first permeable sheet (201) and the second permeable sheet (202) are connected at the fold or to other folded sheets.

8. The self-absorbing water ice pack according to claim 7, characterized in that, The first permeable sheet (201) includes an adhesive part (205) and a water-permeable part (206), wherein the adhesive part (205) is bonded to the bag body (1).

9. The self-absorbing water ice pack according to claim 8, characterized in that, The adhesive part (205) is arranged in a semi-enclosed shape on the outside of the water passage part (206).

10. The self-absorbing water ice pack according to claim 8, characterized in that, The water-passing part (206) of the sheet-like porous material (2) includes a water-permeable layer (203) and an isolation layer (204). The water-permeable layer (203) and the isolation layer (204) are disposed in the same layer or are a double-layer composite structure. The water-permeable layer (203) is made of porous material and the isolation layer (204) is made of non-porous material.

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