Patch with ultra-strong one-way tissue fluid suction capacity

Abstract

The utility model discloses a patch with super-strong one-way tissue fluid absorption capacity. The patch is composed of a patch body, an adhesive tape and a one-way tissue fluid absorption pad. The one-way tissue fluid absorption pad is composed of a plurality of circular truncated cone concave holes, and each circular truncated cone concave hole is of a microstructure; the lower layer of the tissue fluid one-way absorption pad is made of hydrophobic polydimethylsiloxane, and hydrophilic polyacrylamide is spin-coated on the upper layer of the tissue fluid one-way absorption pad. According to the utility model, not only is the pore channel for unidirectionally absorbing the tissue fluid formed, but also the tissue fluid can be output by fully utilizing the capillary action and the surface tension, and the water film is formed through the microstructure of the pore channel, so that the efficiency of unidirectionally absorbing the tissue fluid is greatly improved through the structure of the water film. Compared with the prior art, under the function of sucking tissue fluid in a one-way mode, the problems that an existing patch is low in sucking efficiency and the tissue fluid is prone to backflow are solved, and therefore the patch plays an important role in relieving skin ulceration.

Description

Technical Field

[0001] The utility model relates to the medical field, in particular to a patch with super strong unidirectional tissue fluid absorption ability. Background Art

[0002] In daily life, people often get injured due to bumps. At present, some hemostatic patches only have a simple sponge structure to absorb tissue fluid, making the wound still immersed in the humid environment of tissue fluid, which is not conducive to wound healing and is also vulnerable to infections by bacteria, fungi and other pathogens. Therefore, it is particularly important to create a patch with super strong unidirectional tissue fluid absorption ability. Most of the medical patches on the market do not have a unidirectional tissue fluid absorption structure. Therefore, the performance of most of the patches we use in unidirectionally absorbing tissue fluid is not good. In terms of patents, most of the current medical patch designs relatively focus on the improvement of certain functions such as drug efficacy, breathability, and convenience from the selection of materials and chemical properties, and there are fewer improvements in the structure with the performance of unidirectional tissue fluid absorption.

[0003] The invention patent "A medical patch and its preparation method" applied by Sun Lijun (application number: CN201110036785.4, publication number: CN102283743B) discloses a medical patch and its preparation method, including a surface layer, a release layer and an absorption layer on the same side; this invention constructs a biodegradable patch through the selection of materials, but does not show the absorption efficiency of the absorption layer of the patch and whether the absorbed tissue fluid will flow back. The invention patent "A medical patch for preventing lip ulcers and herpes" applied by Guangdong Yiming Pharmaceutical Co., Ltd. (application number: CN201611117032.5, publication number: CN106421212A) discloses a medical patch for preventing lip ulcers and herpes, including a patch main body, and the patch main body is composed of an adhesion area and a drug area. This invention improves the drug efficacy of the patch through the selection of drugs. The above inventions improve the performance of the patch in certain aspects by introducing material changes or adding new functional areas, but the improvement of the appearance cannot affect the actual utility of the absorption layer, and the retention and backflow of tissue fluid will seriously affect the comfort of patients and the wound healing time. Therefore, there is an urgent need for a patch with super strong unidirectional tissue fluid absorption ability. Content of the Utility Model

[0004] The utility model aims to solve the above problems existing in the prior art, and provides a patch with super strong unidirectional tissue fluid absorption ability. Through the design of the internal structure of the tissue fluid unidirectional absorption pad and the selection of materials, the ability of the material with both hydrophilic and hydrophobic properties to unidirectionally absorb tissue fluid is fully exerted, and under the condition of ensuring the function of absorbing tissue fluid, the problems of low efficiency of absorbing tissue fluid and backflow of tissue fluid in the existing patches are solved.

[0005] The technical solution adopted by the present utility model to solve its technical problems: A patch with super strong unidirectional tissue fluid absorption ability, which is composed of a patch body, an adhesive tape, and a unidirectional tissue fluid absorption pad; the unidirectional tissue fluid absorption pad is arranged on the inner side of the patch body, and the width of the unidirectional tissue fluid absorption pad is smaller than the width of the patch body; it also includes adhesive tapes respectively arranged around the patch body, and the adhesive tape is rectangular.

[0006] Preferably, the outer dimensions of the adhesive tape are 4.6 cm in length, 0.2 cm in width, and 500 μm in height.

[0007] Preferably, the unidirectional tissue fluid absorption pad is an amphoteric thin film with a hydrophilic upper layer material and a hydrophobic lower layer material.

[0008] Preferably, the outer dimensions of the unidirectional tissue fluid absorption pad are 4.6 cm in length, 4.6 cm in width, and 500 μm in height.

[0009] Preferably, the unidirectional tissue fluid absorption pad is internally composed of a number of frustum-shaped concave holes with microstructures, and the inner wall of the frustum presents laterally concave holes arranged in a gradient.

[0010] Preferably, there are 18 columns of frustum-shaped concave holes on the unidirectional tissue fluid absorption pad, 18 in each column, for a total of 324 concave holes; there are six columns of laterally concave holes on the inner wall of the frustum, with an interval of 60° between each column, 3 in each column, for a total of 18 concave holes.

[0011] Preferably, the upper circle diameter of the frustum-shaped concave hole is 500 μm, the bottom circle diameter is 600 μm, the height is 500 μm, and the bottom circle interval is 2 mm. Preferably, the included angle α between the upper side of the laterally concave hole on the inner wall of the frustum and the frustum-shaped concave hole wall is between 30° and 40°, and the included angle β between the lower side and the frustum-shaped concave hole wall is between 60° and 80°.

[0012] Preferably, the outer dimensions of the patch body are 5 cm in length, 5 cm in width, and 500 μm in thickness.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) In the present utility model, through reasonable material selection and the design of the internal microstructure of the material, the unidirectional tissue fluid absorption performance of the patch is greatly improved.

[0015] (2) In this utility model, the inner frustum of the interstitial fluid unidirectional absorption pad greatly improves the capillary force, enabling the liquid to be transported against gravity. (3) In this utility model, the transverse concave holes inside the frustum concave holes of the interstitial fluid unidirectional absorption pad are distributed in a gradient manner, not only forming a surface structure with a gradient distribution of material hydrophilicity, enhancing the ability of unidirectional liquid transportation; at the same time, the transverse concave holes enable a thin water film to be formed during the liquid transportation process. The formation of the water film improves the efficiency of the interstitial fluid unidirectional absorption pad in unidirectionally absorbing interstitial fluid and prevents liquid backflow.

[0016] (4) In this utility model, the patch has excellent skin-friendly properties and can be directly in contact with the skin, making the wearer feel comfortable. Description of the Drawings

[0017] Figure 1 It is an overall schematic diagram of the patch of this utility model.

[0018] Figure 2 It is an internal structure schematic diagram of the interstitial fluid unidirectional absorption pad of this utility model.

[0019] Figure 3 It is a top view of the inner frustum concave hole of the interstitial fluid unidirectional absorption pad of this utility model.

[0020] Figure 4 It is a schematic diagram of unidirectionally absorbing interstitial fluid of this utility model.

[0021] Reference numerals: 1, tape body; 2, adhesive tape; 3, interstitial fluid unidirectional absorption pad; 4, frustum concave hole; 5, transverse concave hole. Detailed Embodiments

[0022] In order to enable researchers or technicians to better understand the technical solutions in this utility model, the technical details in the embodiments will be elaborated below in conjunction with the drawings. The following embodiments are only one implementation manner of the present invention and should not be construed as a limitation to this utility model.

[0023] As Figures 1 to 3 shown, a patch with a super strong ability to unidirectionally absorb interstitial fluid is composed of a tape body 1, an adhesive tape 2, and an interstitial fluid unidirectional absorption pad 3; the interstitial fluid unidirectional absorption pad 3 adopts an amphoteric thin film composed of a combination of a hydrophobic material and a hydrophilic material. The hydrophobic material can use polydimethylsiloxane material, and the hydrophilic material can use polyacrylamide material.

[0024] Specifically, the tape body 1 is 5 cm long, 5 cm wide, and 500 μm thick, and the inside is the interstitial fluid unidirectional absorption pad 3 and the adhesive tape 2.

[0025] Specifically, the tissue fluid unidirectional absorption pad 3 is a porous amphoteric material with a length of 4.6 cm, a width of 4.6 cm, and a thickness of 500 μm; the adhesive tape 2 is made of an adhesive material with a length of 4.6 cm, a width of 0.2 cm, and a thickness of 500 μm.

[0026] Specifically, the included angle α between the upper side of the transverse concave hole 5 on the inner wall of the frustum and the wall of the frustum concave hole 4 is between 30° and 40°, and the included angle β between the lower side and the wall of the frustum concave hole 4 is between 60° and 80°.

[0027] Specifically, the microporous structure design of the tissue fluid unidirectional absorption pad 3 can be fabricated by 3D printing technology, or other processes that can achieve the same requirements can be selected. The specific process is not elaborated here.

[0028] The implementation principle of this technical solution will be further explained as follows:

[0029] As Figure 4 shown, the tissue fluid unidirectional absorption pad of the present utility model uses a frustum structure to construct pores. During the process of absorbing tissue fluid, since the tissue fluid is a hydrophilic liquid, it tends to flow from the hydrophobic side to the hydrophilic side of the tissue fluid unidirectional absorption pad 3; and the pore structure is frustum-shaped. During the flow of the tissue fluid, it can be divided into three stages, namely the wetting process, the transportation process, and the absorption process. The whole process is affected by the surface tension F of the water droplet 1 , and at the same time is affected by the capillary force F of the conical channel 2 ; driven by the surface tension and the capillary force, the tissue fluid can be smoothly transported from the hydrophobic end to the hydrophilic end.

[0030] The transverse concave holes 5 inside the frustum of the tissue fluid unidirectional absorption pad 3 are arranged in a gradient, forming a gradient distribution of hydrophilicity, which promotes the transportation of tissue fluid from the hydrophobic end to the hydrophilic end; at the same time, the structure of the transverse concave holes 5 forms a thin water film during the transportation of the tissue fluid, improving the transportation efficiency of the tissue fluid unidirectional absorption pad 3 and preventing the backflow of the tissue fluid.

[0031] Finally, it should be noted that: the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present utility model.

Claims

1. A patch with super strong one-way tissue fluid absorption capability, comprising a patch body (1), an adhesive tape (2), and a one-way tissue fluid absorption pad (3), characterized in that: The tissue fluid one-way absorption pad (3) is arranged on the inner side of the tape body (1), and the width of the tissue fluid one-way absorption pad (3) is smaller than the width of the tape body (1); it also includes adhesive tapes (2) respectively arranged on the four sides of the tape body (1), and the adhesive tapes (2) are rectangular; The tissue fluid unidirectional absorption pad (3) is an amphiphilic film with a hydrophilic upper layer material and a hydrophobic lower layer material; the tissue fluid unidirectional absorption pad (3) has a plurality of truncated cone concave holes (4) with a microscopic structure inside, and the inner wall of the truncated cone presents transverse concave holes (5) arranged in a gradient.

2. A patch with super strong one-way tissue fluid absorption ability according to claim 1, characterized in that: The outer dimensions of the adhesive tape (2) are: 4.6 cm in length, 0.2 cm in width, and 500 μm in height.

3. A patch with super strong one-way tissue fluid absorption ability according to claim 1, characterized in that: The external dimensions of the tissue fluid one-way absorption pad (3) are: 4.6 cm in length, 4.6 cm in width, and 500 μm in height.

4. A patch with super strong one-way tissue fluid absorption ability according to claim 1, characterized in that: The truncated cone concave holes (4) on the tissue fluid unidirectional absorption pad (3) have 18 rows in total, with 18 holes in each row, for a total of 324 holes; the transverse concave holes (5) on the inner wall of the truncated cone have 6 rows in total, with 3 holes in each row, for a total of 18 holes.

5. A patch with super strong one-way tissue fluid absorption capability according to claim 4, characterized in that: The angle α between the upper side of the transverse concave hole (5) on the inner wall of the truncated cone and the wall of the truncated cone concave hole (4) is between 30° and 40°, and the angle β between the lower side and the wall of the truncated cone concave hole (4) is between 60° and 80°.

6. A patch with super strong one-way tissue fluid absorption capability according to claim 5, characterized in that: The truncated cone concave hole (4) has an upper circle diameter of 500 μm, a bottom circle diameter of 600 μm, a height of 500 μm, and a bottom circle interval of 2 mm.

7. A patch with super strong one-way tissue fluid absorption capability according to claim 6, characterized in that: The outer dimensions of the tape body (1) are: 5 cm in length, 5 cm in width, and 500 μm in thickness.

Images