A breathable liquid medicine leakage preventing dressing substrate

Abstract

The utility model discloses a kind of breathable liquid medicine leakage-preventing dressing substrates, including vertically sequentially laminated together backing layer, breathable adhesive layer, polyurethane breathable layer, breathable silica gel layer, release layer, breathable silica gel layer uniformly has multiple discontinuous breathable holes, breathable hole is along longitudinal and penetrates breathable silica gel layer.The polyurethane breathable layer of the utility model has good breathability, when dressing substrate is pasted on skin, water vapor or other gas between skin and dressing substrate can pass through the breathable hole of breathable silica gel layer, polyurethane breathable layer, breathable adhesive layer, substrate layer in turn, so that skin keeps dry state.Drug core is pasted on breathable silica gel layer, and polyurethane breathable layer can be breathable and liquid blocking, avoid liquid medicine of drug core through breathable hole longitudinal leakage to substrate layer.

Description

Technical Field

[0001] This utility model relates to the field of medical supplies, and in particular to a breathable dressing substrate that prevents leakage of medicine. Background Technology

[0002] In the field of medical dressings, silicone is often used as the adhesive layer of dressing substrates due to its excellent biocompatibility and the fact that it does not damage the skin during peeling. However, silicone's 24-hour water vapor permeability is only 400-800 g / m². 2 This results in poor air permeability for self-adhesive silicone tapes made from it. Clinical practice shows that only dressings applied to the skin surface achieve a 24-hour water vapor permeability of 3000 g / m². 2 As mentioned above, the sweat secreted by human skin can be quickly wicked away, thus keeping the skin dry. If the dressing has poor breathability, sweat will accumulate at the application site, potentially causing adverse allergic reactions such as itching and eczema, thus affecting the user's wearing experience.

[0003] To address this, the medical dressing field has improved dressing substrates to enhance their breathability. For example, Chinese patent CN219148204U discloses a silicone gel dressing comprising a release layer, a composite layer, and a backing layer. The composite layer is formed by combining a silicone gel perforated layer with uniformly textured surfaces and a hydrocolloid perforated layer. The texture increases the breathability of the silicone gel dressing. However, the aforementioned silicone gel dressing may have the following problems: the textures on the surface of the hydrocolloid perforated layer match the textures on the surface of the silicone gel perforated layer, allowing the medicated core liquid to leak through the textures to the backing layer, further soiling the user's clothing and causing partial loss of the medicated core. This also reduces the efficacy of the medication.

[0004] In view of this, the present invention proposes a breathable dressing substrate that prevents leakage of medicine, in order to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the above-mentioned technology, this utility model provides a dressing substrate that can prevent drug leakage while also ensuring breathability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A breathable dressing substrate for preventing drug leakage includes a backing layer, a breathable adhesive layer, a polyurethane breathable layer, a breathable silicone layer, and a release layer stacked longitudinally. The breathable silicone layer has a plurality of discontinuous pores uniformly arranged thereon, and the pores penetrate the breathable silicone layer longitudinally.

[0008] In a preferred embodiment of this invention, the area of ​​a single pore in the breathable silicone layer is 0.7–25 mm². 2 .

[0009] As a preferred embodiment of this utility model, the total area of ​​the air vents accounts for 20-50% of the area of ​​the air-permeable silicone layer.

[0010] In a preferred embodiment of this utility model, the vent hole is cylindrical and the diameter of the vent hole is 1-5 mm.

[0011] In a preferred embodiment of this utility model, the thickness of the breathable silicone layer is 50–300 μm.

[0012] As a preferred embodiment of this utility model, the water vapor transmission rate of the polyurethane breathable layer is greater than 8000 g / m² within 24 hours. 2 .

[0013] In a preferred embodiment of this utility model, the thickness of the polyurethane breathable layer is 10–50 μm.

[0014] As a preferred embodiment of this utility model, the breathable adhesive layer is composed of discontinuous pressure-sensitive adhesive, and the total area of ​​the adhesive is 20% to 40% of the area of ​​the backing layer.

[0015] In a preferred embodiment of this utility model, the backing layer is a non-woven fabric, spunlace fabric, or elastic fabric, and the basis weight of the backing layer is 15-60 g / m². 2 .

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The polyurethane breathable layer of this utility model has good breathability. When the dressing substrate is attached to the skin, water vapor or other gases between the skin and the dressing substrate can be discharged in sequence through the pores of the breathable silicone layer, the polyurethane breathable layer, the breathable adhesive layer, and the substrate layer, keeping the skin dry and preventing water vapor from accumulating and forming sweat, which could lead to adverse allergic reactions such as itching and eczema.

[0018] 2. The drug core is adhered to the breathable silicone layer, while the polyurethane breathable layer can be breathable and liquid-resistant, preventing the drug core from leaking longitudinally into the substrate layer through the vent holes.

[0019] 3. The non-continuous design of the vent holes in the breathable silicone layer prevents the medication from leaking laterally onto the sides of the dressing substrate. Furthermore, the size, shape, and total vent area of ​​the silicone layer are selectively configured to ensure both breathability and a firm adhesion between the silicone layer and the skin and the medication. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the breathable and leak-proof dressing substrate using the present invention.

[0021] The implementation, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The following embodiments further illustrate the features of this utility model and other related features in detail, so as to facilitate understanding by those skilled in the art:

[0023] Reference Figure 1 This utility model provides an embodiment of a breathable dressing substrate that prevents drug leakage.

[0024] A breathable dressing substrate for preventing drug leakage comprises a backing layer 1, a breathable adhesive layer 2, a polyurethane breathable layer 3, a breathable silicone layer 4, and a release layer 5 stacked longitudinally. The breathable silicone layer 4 is uniformly provided with a plurality of discontinuous vent holes 41, which penetrate the breathable silicone layer 4 longitudinally.

[0025] When the dressing substrate is applied to the skin, water vapor or other gases between the skin and the dressing substrate can be discharged in sequence through the vents 41 of the breathable silicone layer 4, the polyurethane breathable layer 3, the breathable adhesive layer 2, and the substrate layer, keeping the skin dry and preventing water vapor from accumulating and forming sweat, which could lead to adverse allergic reactions such as itching and eczema.

[0026] The thickness of the breathable silicone layer 4 is 50–300 μm, and the area of ​​a single pore 41 in the breathable silicone layer 4 is 3–80 mm². 2 The total area of ​​the pores accounts for 20% to 50% of the area of ​​the breathable silicone layer 4. By selectively setting the size of the pores 41 and the total area of ​​the pores 41 of the breathable silicone layer 4, the breathability of the silicone layer is ensured, while the silicone layer can firmly adhere to the skin and the drug core.

[0027] In this embodiment, the vent 41 is cylindrical, with a diameter of 1-5 mm. The vent 41 is discontinuous to prevent the medication from leaking laterally onto the side of the dressing substrate. In other embodiments, the vent 41 can also be rectangular, elliptical, etc., but the vent 41 cannot be a linear hole extending along both sides of the breathable silicone layer 4.

[0028] The polyurethane breathable layer 3 has a thickness of 10–50 μm, allowing for air permeability while preventing liquid leakage. This prevents the medication from seeping longitudinally through the pores 41 into the substrate layer, thus preventing the medication from staining the user's clothing. Furthermore, the water vapor permeability of the polyurethane breathable layer 3 must be at least 8000 g / m² within 24 hours. 2 The above ensures that the overall water vapor transmission rate of the dressing substrate is at least 3000 g / m² within 24 hours. 2 This ensures the breathability of the dressing substrate.

[0029] The breathable adhesive layer 2 consists of discontinuous pressure-sensitive adhesive dots, with gaps between the dots allowing water vapor to pass through. The total area of ​​the adhesive dots is 20%–40% of the area of ​​the backing layer 1, and the amount of adhesive applied to the backing layer 1 is 5–20 g / m². 2 This ensures that the backing layer 1 can be firmly connected to the polyurethane breathable layer 3.

[0030] Backing layer 1 is made of non-woven fabric, spunlace fabric, or elastic fabric, and its basis weight is 15–60 g / m². 2 It provides mechanical support for the dressing substrate.

[0031] Before using the dressing substrate, release layer 5 covers the breathable silicone layer 4 to protect the breathable silicone layer 4 and the medicated core. Release layer 5 is removed before using the dressing substrate. Specifically, the basis weight of release layer 5 is 80–150 g / m². 2 Release paper with single-sided or double-sided coating, or release film with a thickness of 50–200 μm.

[0032] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A breathable, leak-proof dressing substrate, characterized in that, It includes a backing layer (1), a breathable adhesive layer (2), a polyurethane breathable layer (3), a breathable silicone layer (4), and a release layer, which are stacked together longitudinally. The breathable silicone layer (4) is uniformly provided with a plurality of discontinuous breathable holes (41), which penetrate the breathable silicone layer (4) longitudinally.

2. The breathable and leak-proof dressing substrate according to claim 1, characterized in that, The area of ​​a single pore (41) in the breathable silicone layer (4) is 0.7–25 mm. 2 .

3. A breathable, leak-proof dressing substrate according to claim 1 or 2, characterized in that, The total area of ​​the vent holes (41) accounts for 20% to 50% of the area of ​​the breathable silicone layer (4).

4. A breathable, leak-proof dressing substrate according to claim 1 or 2, characterized in that, The vent (41) is cylindrical and has a diameter of 1 to 5 mm.

5. The breathable and leak-proof dressing substrate according to claim 1, characterized in that, The thickness of the breathable silicone layer (4) is 50-300 μm.

6. The breathable and leak-proof dressing substrate according to claim 1, characterized in that, The thickness of the polyurethane breathable layer (3) is 10-50 μm.

7. The breathable and leak-proof dressing substrate according to claim 1, characterized in that, The breathable adhesive layer (2) is composed of discontinuous pressure-sensitive adhesive, and the total area of ​​the adhesive is 20% to 40% of the area of ​​the backing layer (1).

8. The breathable and leak-proof dressing substrate according to claim 1, characterized in that, The backing layer (1) is a non-woven fabric, spunlace fabric, or elastic fabric, and the basis weight of the backing layer (1) is 15-60 g / m². 2 .

Images