A medical cooling hydrogel bandage

Abstract

This invention provides a medical cold compress hydrogel bandage, relating to the biomedical field. It is a bandage roll structure, primarily comprising a bandage fabric body capable of being rolled into a roll. In its unfolded state, the bandage fabric body has a gel layer and a connector fixedly disposed on one surface, with the gel layer and connector positioned near the two ends of the bandage. The gel layer is used for direct contact with the skin during bandaging, and the connector is used to fix the bandage ends to the fabric surface of the bandage fabric body after bandaging. When the bandage fabric body is rolled into a roll, the gel layer end is located at the outer end of the roll, and the connector is located at the core of the roll. The gel layer includes component A, component B, and purified water. Component A mainly includes glycerin, sodium polyacrylate, and a self-made composite crosslinking agent, while component B mainly includes kaolin and tartaric acid. This invention ensures both the ease of use of the bandage roll and its ability to be easily unrolled and used within a relatively long shelf life.

Description

Technical Field

[0001] This invention relates to the field of biomedical technology, specifically to a medical cold compress hydrogel bandage. Background Technology

[0002] Bandages are common medical supplies used in clinical practice for wound dressing and fixation, with gauze rolls being the most common type. In some clinical scenarios, such as when a patient's wound requires cold compresses, the cold compress must be applied before bandaging. To address this, existing technologies have developed bandages with cold compress functions, such as the cold compress bandage disclosed in utility model patent CN210872461U, which incorporates a cold compress bag and pressure plate in the middle of the bandage, integrating cold compress and bandaging functions. However, such long, strip-shaped bandages are inconvenient to use, unlike traditional gauze roll bandages which can be quickly rolled up and bandaged by unwrapping from one end.

[0003] The applicant recently filed a patent application for a cold compress bandage that can be used immediately after unrolling, just like a traditional gauze roll bandage, to achieve rapid bandaging. However, because the gel layer is in direct contact with the bandage fabric in this structure, it will stick together over time, which is not convenient for long-term storage of such hydrogel bandages and affects its shelf life.

[0004] Therefore, this application aims to provide a long-lasting medical cold compress hydrogel bandage. Summary of the Invention

[0005] This invention addresses the aforementioned problems in the prior art by providing a medical cold compress hydrogel bandage that facilitates quick and easy cold compress bandaging and fixation for users, while also ensuring its shelf life.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A medical cold compress hydrogel bandage, characterized in that it is a bandage roll structure, which mainly includes a bandage cloth body that can be rolled into a bandage roll. In the unfolded state, a gel layer and a connector are respectively fixedly disposed on one surface of the bandage cloth body. The gel layer and the connector are respectively close to the two bandage heads of the bandage cloth body. The gel layer is used to directly contact the skin during bandaging, and the connector is used to fix the bandage heads to the cloth surface of the bandage cloth body after bandaging. When the bandage cloth body is rolled into a bandage roll structure, the gel layer end is located at the outer end of the bandage roll, and the connector is located at the core of the bandage roll.

[0007] The gel layer comprises component A, component B, and purified water;

[0008] Component A includes the following components and their mass fractions:

[0009] 20-25 parts glycerin

[0010] Sodium polyacrylate 3.5-7 parts,

[0011] Crosslinking agent 0.1-0.2 parts,

[0012] 0.1-0.2 parts of disodium EDTA,

[0013] Cooling agent 0.1-0.2 parts;

[0014] Component B includes the following components and their mass fractions:

[0015] 0.2-0.4 parts of kaolin,

[0016] Tartaric acid 0.15-0.3 parts,

[0017] Polyvinylpyrrolidone 0-5 parts.

[0018] Furthermore, the connector is a Velcro or adhesive, used to fix the bandage head to the surface of the bandage cloth body by adhesive after bandaging.

[0019] Furthermore, the surface of the connector is covered with a removable anti-stick layer, which is preferably release paper or release film.

[0020] Furthermore, the crosslinking agent is a mixture of aluminum hydroxyl and chitosan, preferably a mixture of aluminum hydroxyl and chitosan in a mass ratio of 8-9:1.

[0021] Furthermore, the sodium polyacrylate is a mixture of sodium polyacrylate VP20 and sodium polyacrylate P55N, preferably a mixture of sodium polyacrylate VP20 and sodium polyacrylate P55N in a mass ratio of 3-6:1.

[0022] Furthermore, a semi-isolation layer is provided on the surface of the gel layer. The semi-isolation layer partially covers the surface of the gel layer in a linear or mesh pattern. Its function is to reduce the adhesion between the surface of the cured gel layer and the surface of the bandage fabric when they re-adhere, prevent the two from sticking together too much, which would prevent the bandage head from being unrolled, and extend the shelf life of the cold compress bandage product.

[0023] Furthermore, the semi-isolation layer has a mesh structure, specifically a thin mesh structure, and its material is cotton, polyester fiber, or TPU.

[0024] Furthermore, the bandage fabric itself is made of elastic non-woven fabric.

[0025] Furthermore, when the bandage fabric body is wound into a bandage roll structure, a roller for winding the bandage fabric body is provided at the core of the bandage roll.

[0026] Furthermore, the method for preparing the gel layer is as follows:

[0027] Preparation of hydrogel coating solution: Add the prescribed amounts of sodium polyacrylate, crosslinking agent, disodium EDTA, and cooling agent to glycerin and stir until homogeneous to obtain component A; dissolve the prescribed amount of tartaric acid in water to prepare tartaric acid solution, dissolve kaolin in tartaric acid solution, and finally add polyvinylpyrrolidone to it and stir until a homogeneous phase is formed to obtain component B; slowly add component B to component A and stir continuously until a uniform crosslinked state is formed to obtain the hydrogel coating solution;

[0028] Coating: The hydrogel coating liquid is applied to the gel layer area of ​​the bandage fabric body. After curing, the gel layer is fixed to the surface of the bandage fabric body.

[0029] In addition, in the above-mentioned bandage fabric body structure, there is a preset gap between the gel layer on its surface and the near end of the connector. In this area, there is only the bandage fabric body and no other parts, which is used for wrapping during the bandaging process.

[0030] The beneficial effects of this invention are:

[0031] 1. This invention features a bandage fabric body wound into a roll, with a gel layer and connector fixed at both ends of the unfolded surface. This achieves both cold compress and bandaging effects. Furthermore, since no release layer is placed on the gel layer surface, the bandage roll can be quickly unwound from the outer end for easy wrapping, making it more convenient and efficient to operate. The product is also easy to store and package. Based on this structure, the hydrogel layer formulation of this invention, especially the synergistic effect of aluminum hydroxyl and chitosan in the crosslinking agent, combined with suitable sodium polyacrylate and polyvinylpyrrolidone, ensures the peelability of the bandage roll even without a release film on the hydrogel layer surface. Specifically, the shelf life of the bandage roll can be extended to over 180 days, ensuring both ease of use and smooth unwinding within its shelf life.

[0032] 2. The present invention further provides a semi-isolation layer with a mesh structure on the surface of the gel layer. When in use, the semi-isolation layer can be covered without removing it. This does not affect the application of the hydrogel to the skin surface for cold compresses through the semi-isolation layer, while also isolating the gel layer from the bandage fabric body that it is in contact with to a certain extent. This extends the time during which the gel layer can be separated from the bandage fabric body attached to its surface. In other words, it prevents the bandage roll from becoming impossible to remove due to the gel layer adhering to the bandage fabric body after prolonged placement. This further extends the shelf life of the medical cold compress hydrogel bandage of the present invention to about one year. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the flat-lay structure of a medical cold compress hydrogel bandage in an unfolded state according to an embodiment of the present invention;

[0034] Figure 2This is a cross-sectional view of a medical cold compress hydrogel bandage in its unfolded state according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of a medical cold compress hydrogel bandage in a wound state according to an embodiment of the present invention;

[0036] Figure 4 yes Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0037] Figure 5 yes Figure 3 A magnified schematic diagram of the local structure at point B;

[0038] Figure 6 This is a schematic diagram of the flat-lay structure of a medical cold compress hydrogel bandage in its unfolded state, according to another embodiment of the present invention.

[0039] Figure 7 This is a cross-sectional view of the medical cold compress hydrogel bandage in its unfolded state according to another embodiment of the present invention;

[0040] In the diagram: 1. Bandage fabric body, 2. Gel layer, 3. Connector, 4. Anti-adhesive layer, 5. Semi-isolation layer, 6. Bandage roll, 7. Roller. Detailed Implementation

[0041] The principles and features of the present invention are described below. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0042] Example 1

[0043] The medical cold compress hydrogel bandage of this embodiment includes a bandage fabric body 1 wound into a bandage roll 6 structure. The bandage fabric body 1 is made of commercially available cotton-based elastic non-woven fabric, and its unfolded state is shown in the figure. Figure 1 and Figure 2 As shown, its unfolded dimensions are 50cm long and 10cm wide. One surface of the bandage body 1 has a gel layer 2 and a connector 3, while the other surface is unattached. The gel layer 2 and connector 3 are located near the two bandage ends of the bandage body 1. The gel layer is 22cm long and 10cm wide, with a pre-set gap between the proximal ends of the gel layer 2 and connector 3. Only the bandage body is present in this area, with nothing else. The gel layer 2 is used for direct contact with the skin during bandaging, and the connector 3 is used to fix the bandage ends to the fabric surface of the bandage body 1 after bandaging. When the bandage body 1 is rolled into a roll, see... Figures 3-5 As shown, the bandage fabric body 1 is wound around a paper roll 7 (diameter 2cm) to form a bandage roll 6. At this time, the gel layer end is the outer end of the bandage roll 6, while the connector end is the inner end of the bandage roll 6. That is, the connector 3 is located near the core of the bandage roll 6.

[0044] In this embodiment, the gel layer includes component A and component B; wherein,

[0045] Component A includes the following components and their mass fractions:

[0046] 23 parts glycerin

[0047] A mixture of 5.5 parts of sodium polyacrylate VP20 and sodium polyacrylate P55N, wherein the mass ratio of sodium polyacrylate VP20 to sodium polyacrylate P55N is 5:1.

[0048] 0.15 parts of a mixture of aluminum hydroxyl and chitosan, wherein the mass ratio of aluminum hydroxyl and chitosan is 8:1, and 0.1 parts of disodium EDTA.

[0049] Cooling agent WS-23 0.2 parts,

[0050] Preservative BIOGUARD-CP 0.2 parts;

[0051] Component B includes the following components and their mass fractions:

[0052] 0.3 parts kaolin,

[0053] Tartaric acid 0.25 parts,

[0054] Two parts of polyvinylpyrrolidone,

[0055] Add purified water to a total of 100 parts.

[0056] The method for preparing the gel layer is as follows:

[0057] Preparation of hydrogel coating solution: Add the prescribed amounts of sodium polyacrylate, crosslinking agent, disodium EDTA, and cooling agent to glycerin and stir until homogeneous to obtain component A; dissolve the prescribed amount of tartaric acid in water to prepare tartaric acid solution, dissolve kaolin in tartaric acid solution, and finally add polyvinylpyrrolidone to it and stir until a homogeneous phase is formed to obtain component B; slowly add component B to component A and stir continuously until a uniform crosslinked state is formed to obtain the hydrogel coating solution;

[0058] Coating: Apply hydrogel coating liquid to the gel layer area of ​​the bandage fabric body 1. After curing, the gel layer is fixed to the surface of the bandage fabric body 1.

[0059] Wrapping: The bandage cloth body 1 is wrapped around the paper roll 7 to form a bandage roll, with the outer end of the bandage coated with hydrogel.

[0060] Example 2

[0061] The structure and gel layer preparation method of the medical cold compress hydrogel bandage in this embodiment are the same as those in Example 1, except that...

[0062] The medical hydrogel of this embodiment includes component A and component B; wherein...

[0063] Component A includes the following components and their mass fractions:

[0064] 20 parts glycerin

[0065] A mixture of sodium polyacrylate VP20 and sodium polyacrylate P55N, comprising 3.5 parts, wherein the mass ratio of sodium polyacrylate VP20 to sodium polyacrylate P55N is 6:1.

[0066] 0.1 parts of a mixture of aluminum hydroxyl and chitosan, wherein the mass ratio of aluminum hydroxyl and chitosan is 8:1, and 0.1 parts of disodium EDTA.

[0067] Cooling agent WS-23 0.1 parts,

[0068] Preservative BIOGUARD-CP 0.2 parts;

[0069] Component B includes the following components and their mass fractions:

[0070] 0.2 parts kaolin,

[0071] Tartaric acid 0.15 parts,

[0072] 5 parts of polyvinylpyrrolidone

[0073] Add purified water to a total of 100 parts.

[0074] Example 3

[0075] The structure and gel layer preparation method of the medical cold compress hydrogel bandage in this embodiment are the same as those in Example 1, except that...

[0076] The medical hydrogel of this embodiment includes component A and component B; wherein...

[0077] Component A includes the following components and their mass fractions:

[0078] 25 parts glycerin

[0079] A mixture of 7 parts of sodium polyacrylate VP20 and sodium polyacrylate P55N, wherein the mass ratio of sodium polyacrylate VP20 to sodium polyacrylate P55N is 3:1.

[0080] 0.2 parts of a mixture of aluminum hydroxyl and chitosan, wherein the mass ratio of aluminum hydroxyl and chitosan is 9:1, and 0.2 parts of disodium EDTA.

[0081] Cooling agent WS-23 0.2 parts,

[0082] Preservative BIOGUARD-CP 0.2 parts;

[0083] Component B includes the following components and their mass fractions:

[0084] 0.4 parts kaolin,

[0085] Tartaric acid 0.3 parts,

[0086] Add purified water to a total of 100 parts.

[0087] The medical cooling hydrogel bandage of the above embodiment is packaged in the form of bandage roll 6, i.e. Figure 3 As shown in the diagram. When it is necessary to use a cold compress bandage to bandage the injured area, take out the bandage roll 6 from the packaging bag. At this time, remove the gel layer end from the bandage head and apply the gel layer 2 directly to the injured area. The gel layer 2 forms a preliminary fixation with the skin surface through the action of the gel. Then continue to unroll the bandage roll 6 and wrap it around the injured area until the bandage roll 6 is completely unrolled and the connector 3 is exposed. Finally, fix the connector 3 to the outer surface of the bandage cloth body 1 to complete the bandaging. In this way, cold compress and bandaging are achieved simultaneously, and it is ready to use immediately after opening, making the operation very convenient and quick.

[0088] In a preferred embodiment of the present invention, the connector 3 can be a Velcro or adhesive. After the bandage cloth body is rolled around the affected area, it can be quickly and firmly attached to the surface of the bandage cloth body 1 using the connector 3. Since the bandage cloth body is generally made of a textile fabric with a certain degree of elasticity, such as cotton or polyester fabric, it can be attached simply by contacting the Velcro or adhesive, allowing the bandage to be used immediately after rolling and quickly fixed after bandaging, making the operation convenient and quick. Based on this embodiment, since the connector 3 is located in the inner core of the bandage roll, in order to prevent the connector 3 from sticking to the bandage cloth body 1 or the roll 7 before use and making it inconvenient to remove, a removable anti-adhesive layer 4 can be covered on the surface of the connector 3, specifically release paper or release film. After the bandage cloth body is rolled around the affected area, the anti-adhesive layer 4 can be peeled off to attach the connector 3 to the surface of the bandage cloth body 1. In practice, after the bandage roll is stored for a period of time, the anti-adhesive layer 4 at the core of the roll will be deformed into an arc shape. When the bandage cloth body is unwound from the roll, the anti-adhesive layer 4 of the release paper or release film structure can easily detach from the connector 3, which is convenient for quick fixation by the connector 3 after unwinding.

[0089] Example 4

[0090] The hydrogel layer composition in the medical cold compress hydrogel bandage of this embodiment is the same as that in Embodiment 1, and the structure of the medical cold compress hydrogel bandage is basically the same as that in Embodiment 1. The difference is that a semi-isolation layer 5 can also be provided on the surface of the gel layer 2, specifically a thin polyester mesh fabric.

[0091] During the manufacturing process, the hydrogel coating liquid is applied to the gel layer area of ​​the bandage fabric body 1. After curing, the gel layer is fixed to the surface of the bandage fabric body 1. Then, the semi-isolation layer 5 is placed on the surface of the gel layer 2, and finally, it is rolled into a bandage roll.

[0092] Example 5

[0093] The structure and hydrogel layer composition of the medical cold compress hydrogel bandage in this embodiment are basically the same as those in Embodiment 1. The difference is that the semi-isolation layer 5 is made of a thin TPU mesh fabric.

[0094] Comparative Example 1

[0095] The structure of the medical cold compress hydrogel bandage in this comparative example is the same as that in Example 1. The difference is that its hydrogel layer is based on the formulation of Example 2 disclosed in patent document CN103961415B (excluding the traditional Chinese medicine extract therein). The specific preparation is as follows:

[0096] Preparation of hydrogel coating solution: 0.5 parts sodium polyacrylate and 0.05 parts aluminum hydroxyl group were added to 6 parts glycerol and mixed evenly to form phase I; 0.1 parts tartaric acid were dissolved in 16 parts water to prepare tartaric acid solution, and then 0.5 parts polyvinylpyrrolidone were mixed in and stirred until completely dissolved to form phase II; phase II was added to phase I and stirred evenly until cross-linked to obtain hydrogel coating solution.

[0097] Coating: Apply the hydrogel coating liquid to the gel layer area of ​​the bandage fabric. After curing, the gel layer is fixed to the surface of the bandage fabric.

[0098] Wrapping: The bandage fabric is wrapped around a paper roll to form a bandage roll, with the outer end of the bandage coated with hydrogel.

[0099] Comparative Example 2

[0100] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that the chitosan is replaced with aluminum hydroxyl.

[0101] Comparative Example 3

[0102] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that the mass ratio of aluminum hydroxyl to chitosan is adjusted to 7:1.

[0103] Comparative Example 4

[0104] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that the mass ratio of aluminum hydroxyl to chitosan is adjusted to 10:1.

[0105] Comparative Example 5

[0106] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that sodium polyacrylate P55N is replaced with sodium polyacrylate VP20.

[0107] Comparative Example 6

[0108] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that sodium polyacrylate VP20 is replaced with sodium polyacrylate P55N.

[0109] Comparative Example 7

[0110] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1. The composition of the hydrogel is basically the same as that in Example 1. The difference is that the mass ratio of sodium polyacrylate VP20 to sodium polyacrylate P55N is adjusted to 2:1.

[0111] Comparative Example 8

[0112] The structure and preparation method of the medical cold compress hydrogel bandage in this comparative example are the same as those in Example 1, except that the composition of the hydrogel is basically the same as that in Example 1, except that polyvinylpyrrolidone is replaced with sodium carboxymethyl cellulose.

[0113] In existing technologies, a release liner is often applied to the surface of the hydrogel layer. This necessitates removing the entire release liner before use, making it inconvenient to remove the bandage head and apply it directly to the skin for wrapping. Unlike existing technologies, the medical cold-compression hydrogel bandages of Examples 1-3 and Comparative Examples 1-8 are used as follows: Pull out the bandage head and gel layer end of the bandage roll, and apply the exposed hydrogel layer directly to the affected area (e.g., the arm) requiring cold compress. Then, unroll the bandage while simultaneously wrapping it with the unfolded bandage body until the other end is exposed. Finally, attach the bandage head directly to the outer surface of the bandage body using connector 3 to complete the fixation. For Examples 4 and 5, the added semi-release layer 5 does not affect the cold compress effect; therefore, it is not necessary to remove the semi-release layer 5 during use, and the method is the same as above. After use, the skin feel of Examples 4 and 5 is not significantly different from Example 1, and the semi-release layer 5 does not affect the cold compress effect of the hydrogel layer.

[0114] In addition, the medical cold compress hydrogel bandages prepared in the above embodiments and comparative examples were placed in packaging bags and placed under the same conditions to test their shelf life. The shelf life mentioned here is measured by the adhesion between the hydrogel layer at the bandage head and the back of the bandage fabric (the hydrogel is coated and cured on the front of the bandage fabric when wet), making the bandage roll difficult to peel off and unfold, or affecting its cold compress use due to gel layer adhesion. The test results are shown in Table 1.

[0115] Table 1

[0116]

[0117]

[0118] In Table 1, A, B, C, D, and E represent different phenomena when the bandage roll is unrolled, specifically:

[0119] A. There is no obvious adhesion, and it can be unwound smoothly. After unwinding, no gel layer adheres to the back of the bandage cloth body 1.

[0120] B, has a slight stickiness, can be unrolled, and after unrolling, there is no obvious gel layer adhering to the back of the bandage cloth body 1, which does not affect the use of cold compress bandaging.

[0121] C. There is slight adhesion, but it can be unrolled. After unrolling, a small amount of the gel layer is adhered to the back of the bandage body 1, which does not affect the use of cold compress.

[0122] D. There is obvious adhesion. It can be unrolled. After unrolling, the gel layer is obviously adhered to the back of the bandage cloth body 1, making it unusable.

[0123] E. There is obvious adhesion, making it impossible to unwind normally.

[0124] A comparison of the data from Examples 1-3 and Comparative Examples 1-8 in Table 1 shows that the hydrogel layer using the formulation of this embodiment, when applied to the medical cold compress hydrogel bandage structure of this embodiment, ensures basic coating of the gel layer and guarantees the peelability and unwindability of the bandage roll even without an isolation film applied to the surface of the gel layer. This effectively extends the shelf life of the bandage roll, specifically exceeding 180 days. Even after 180 days of storage, the bandage roll can still be unwound without affecting its normal use for cold compresses. In contrast, Comparative Examples 1-8, using existing hydrogel coating techniques and replacing the crosslinking agent, sodium polyacrylate, or polyvinylpyrrolidone in this embodiment, all significantly impacted the shelf life of the bandage roll. This indicates that the technical effects of this invention are the synergistic effect of multiple factors. Without an isolation film applied to the surface of the gel layer, the shelf life of the bandage roll is extended from less than 5 days in the prior art to over 180 days, representing a significant improvement and facilitating the storage and convenient use of the medical cold compress hydrogel bandage with the specific bandage roll structure of this invention.

[0125] As described above and compared with the data in Examples 1-3 and Examples 4 and 5 in Table 1, it can be seen that after applying the semi-isolation layer 5, the hydrogel can still apply cold compresses to the skin surface without needing to remove it. Simultaneously, it can isolate the gel layer 2 from the bandage fabric 1 it contacts, extending the time during which the gel layer 2 can be separated from the bandage fabric 1. This prevents the bandage roll from becoming impossible to remove due to the gel layer 2 adhering to the bandage fabric after prolonged placement, thus extending the overall effectiveness of the cold compress bandage. Specifically, the bandage rolls in Examples 1-3 without the semi-isolation layer 5 have a shelf life exceeding 180 days, while the bandage rolls with the semi-isolation layer 5 have a shelf life of up to approximately one year.

Claims

1. A medical cold compress hydrogel bandage, characterized in that, The application discloses a bandage roll structure which mainly comprises a bandage cloth body (1) capable of being wound into a bandage roll, wherein one surface of the bandage cloth body (1) is provided with a gel layer (2) and a connecting piece (3) respectively in an unfolded state, the gel layer (2) and the connecting piece (3) are arranged close to two bandage heads of the bandage cloth body (1) respectively, the gel layer (2) is not provided with a release layer on the surface, the gel layer (2) is used for directly contacting the skin during bandaging, and the connecting piece (3) is used for fixing the bandage head on the cloth surface of the bandage cloth body (1) after bandaging; the surface of the gel layer (2) is provided with a semi-isolation layer (5), the semi-isolation layer (5) is a net structure, and the material of the semi-isolation layer (5) is cotton or polyester fiber or TPU. When the bandage cloth body (1) is wound into a bandage roll (6) structure, the gel layer is located at the outer end of the bandage roll (6), the connecting piece (3) is located at the roll core of the bandage roll (6), and a preset interval is left between the gel layer and the connecting piece, and only the bandage cloth body is arranged in the preset interval without other components. The gel layer comprises A component, B component and purified water. The A component comprises the following components and mass fractions: glycerol 20-25 parts, sodium polyacrylate 3.5-7 parts, a crosslinking agent 0.1-0.2 parts, EDTA disodium 0.1-0.2 parts, a cooling agent 0.1-0.2 parts. The B component comprises the following components and mass fractions: kaolin 0.2-0.4 parts, tartaric acid 0.15-0.3 parts, polyvinylpyrrolidone 0-5 parts.

2. The medical cold compress hydrogel bandage of claim 1, wherein, The connecting piece (3) is a magic buckle or an adhesive, which is used for fixing the bandage head on the cloth surface of the bandage cloth body (1) by an adhesive mode after bandaging.

3. The medical cold compress hydrogel bandage of claim 2, wherein, The surface of the connecting piece (3) is covered with a removable anti-adhesion layer (4).

4. The medical cold compress hydrogel bandage of claim 3, wherein, The anti-adhesion layer (4) is release paper or release film.

5. The medical cold-water gel bandage according to claim 1, characterized in that The crosslinking agent is a mixture of glycyrrhizic acid and chitosan.

6. The medical cold compress hydrogel bandage of claim 5, wherein, The crosslinking agent is a mixture of glycyrrhizic acid and chitosan with a mass ratio of 8-9:

1.

7. The medical cold-water gel bandage according to claim 1, characterized in that The sodium polyacrylate is a mixture of sodium polyacrylate VP20 and sodium polyacrylate P55N.

8. The medical cold compress hydrogel bandage of claim 7, wherein, The sodium polyacrylate is a mixture of sodium polyacrylate VP20 and sodium polyacrylate P55N with a mass ratio of 3-6:

1.

9. The medical cold-water gel bandage of claim 1, wherein, The material of the bandage cloth body (1) is elastic non-woven fabric.

10. The medical cold-water gel bandage of claim 1, wherein, When the bandage cloth body (1) is wound into a bandage roll (6) structure, a winding shaft (7) for winding the bandage cloth body (1) is arranged at the roll core of the bandage roll (6).

11. The medical cold-water gel bandage of claim 1, wherein, The preparation method of the gel layer is as follows: preparing a hydrogel coating solution: adding formula amount of sodium polyacrylate, a crosslinking agent, EDTA disodium and a cooling agent into glycerol, stirring until mixed uniformly to prepare the A component; dissolving formula amount of tartaric acid in water to prepare a tartaric acid solution, dissolving kaolin in the tartaric acid solution, and finally adding polyvinylpyrrolidone into the tartaric acid solution, stirring until a uniform phase is obtained to prepare the B component; slowly adding the B component into the A component and continuously stirring until a uniform crosslinking state is obtained to prepare the hydrogel coating solution; applying glue: applying the hydrogel coating solution to the gel layer area of the bandage cloth body (1), and fixing the gel layer on the surface of the bandage cloth body (1) after solidification.

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