Micro-current foam application

Abstract

The utility model belongs to the technical field of dressings, and discloses a micro-current foam application which comprises a protective layer, a dressing layer is arranged on the bottom side of the protective layer, a piezoelectric layer is arranged on the bottom side of a bonding layer, and a release layer is arranged on the bottom side of the piezoelectric layer. When the piezoelectric material is in contact with the skin, the surface potential of the piezoelectric material is changed or the piezoelectric material is subjected to external pressure, micro-current can be automatically generated, pressure is generated on the piezoelectric layer when the dressing is pasted on the skin so as to generate the micro-current, or when the piezoelectric material is in contact with the wound, the surface potential is changed so as to generate the micro-current, and an endogenous electric field at the wound is recovered. Therefore, proliferation and migration of nerve cells and fiber cells are promoted, the wound healing speed is increased, the piezoelectric layer releases current, an endogenous electric field at the wound is recovered, wound healing is promoted, the dressing layer absorbs percolate on the surface of the wound, and skin around the wound is prevented from being soaked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dressings, more particularly to a micro-current foam dressing. BACKGROUND

[0002] Modern wound healing theory believes that a moist microenvironment is conducive to wound healing, so traditional dressings are gradually being replaced by new dressings such as foam dressings, hydrogel dressings, etc. The current development direction of dressings is functional dressings, such as dressings with sterilization and drug release effects. Micro-current therapy has been applied in clinical practice and can guide cell proliferation and migration to accelerate wound healing.

[0003] However, the current micro-current dressings generally apply current through an external power source, which has high requirements for the biocompatibility of electrode materials, and is high in cost and poor in use experience; there are also self-power generation dressings made by applying silver-zinc ions on a film to form a micro-battery with wound exudate to release current to promote wound healing. However, the carrier loaded with silver-zinc ions is generally a film or non-woven fabric, which is not suitable for wounds with a large amount of exudate and non-woven fabric can easily cause wound adhesion.

[0004] To solve the above problems, the present application provides a micro-current foam dressing. CONTENT OF THE UTILITY MODEL

[0005] The present application provides the following technical solution: a micro-current foam dressing, comprising a protective layer, the bottom side of the protective layer is provided with a dressing layer, the bottom side of the dressing layer is provided with a paste layer, the bottom side of the paste layer is provided with a piezoelectric layer, and the bottom side of the piezoelectric layer is provided with a release layer.

[0006] Through the above technical solution, a film made of a material with surface potential effect and piezoelectric effect is compounded with a foam dressing, when the piezoelectric material contacts the skin and its surface potential changes or is subjected to external pressure, it can automatically generate micro-current, the dressing is pasted on the skin to generate pressure on the piezoelectric layer and further generate micro-current, or the piezoelectric material contacts the wound, the surface potential changes to generate micro-current, and the endogenous electric field at the wound site is restored, thereby promoting the proliferation and migration of nerve cells and fibroblasts, accelerating the wound healing speed, the piezoelectric layer releases current, restores the endogenous electric field at the wound site, and promotes wound healing, and the dressing layer absorbs the exudate on the surface of the wound to prevent the skin around the wound from being soaked.

[0007] Further, the material of the protective layer is a polyurethane film, and the material of the paste layer is a polyacrylate pressure-sensitive adhesive.

[0008] Through the above technical solution, the paste layer is mainly pasted on the skin to play a fixing role.

[0009] Further, the square meter gram weight of the adhesive layer is between 10 g / m2~150 g / m2, and the material of the dressing layer is polyurethane.

[0010] Through the above technical solution, the dressing layer absorbs the exudate on the wound surface, preventing the skin around the wound from being soaked.

[0011] Further, the pore size of the dressing layer is between 20 μm~500 μm, and the thickness of the dressing layer is between 1 mm~3 mm.

[0012] Further, the material of the piezoelectric layer is left-handed polylactic acid, the size of the piezoelectric layer is smaller than that of the dressing layer, the thickness of the piezoelectric layer is 0.5 mm, and the material of the release layer is Gelasin release paper.

[0013] Through the above technical solution, the synthetic piezoelectric material of left-handed polylactic acid (PLLA) generally has good hydrophobicity, which can avoid adhesion to the wound.

[0014] Further, the square meter gram weight of the release layer is between 40 g / m2~150 g / m2, and the thickness of the protective layer is 20 μm.

[0015] Further, the thickness of the dressing layer is 2 mm, and the square meter gram weight of the adhesive layer is 40 g / m2.

[0016] In summary, the present application has the following beneficial technical effects:

[0017] 1. It has a self-generating function without external power supply, greatly improving the portability and use experience of the dressing.

[0018] 2. The dressing layer can absorb wound exudate to prevent the exudate from soaking the skin around the wound.

[0019] 3. The piezoelectric film can release a micro-current, which can promote the migration and regeneration of nerve cells and fibroblasts, and accelerate the healing speed of the wound.

[0020] 4. The piezoelectric film has good biocompatibility and low adhesion, and is not easy to cause adhesion between the wound and the dressing. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the present application;

[0022] Figure 2 is a side view of the present application.

[0023] Explanation of Markers in the Figure:

[0024] 1, protective layer; 2, dressing layer; 3, adhesive layer; 4, piezoelectric layer; 5, release layer. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment:

[0029] The present application discloses a kind of micro-current foam dressing, please refer to Figure 1 And Figure 2 , including protective layer 1, protective layer 1 has the function of waterproof, antibacterial, can prevent external moisture or bacteria etc. Invade puncture point, while it has certain water vapor permeability, can make the skin sweat of sticking part can normally discharge, prevent the appearance of immersion or water vapor accumulation, the bottom side of protective layer 1 is provided with dressing layer 2, the bottom side of dressing layer 2 is provided with adhesive layer 3, adhesive layer 3 is mainly pasted to skin, plays a fixed role, the bottom side of adhesive layer 3 is provided with piezoelectric layer 4, the bottom side of piezoelectric layer 4 is provided with release layer 5, the material of protective layer 1 is polyurethane film, polyurethane material has good water vapor permeability, tensile strength and softness, the material of adhesive layer 3 is polyacrylate pressure-sensitive adhesive, the square meter gram weight of adhesive layer 3 is between 10g / ㎡~150g / ㎡;

[0030] The material of the dressing layer 2 is polyurethane foam material, which has good water absorption and water retention, and good biocompatibility. The pore size of the dressing layer 2 is between 20 μm and 500 μm, and the thickness of the dressing layer 2 is between 1 mm and 3 mm. The dressing layer 2 has good air permeability, water absorption and biocompatibility, and can absorb a large amount of wound exudate. The material of the piezoelectric layer 4 is a zinc oxide modified polylactic acid film. Zinc oxide is one of the commonly used non-polar piezoelectric materials. The addition of zinc oxide in polylactic acid enhances the piezoelectric properties of the film and improves the strength and stability of the material under electrical stimulation. The polylactic acid film is made by hot pressing, and the piezoelectric properties of the film are improved by polarization and induced orientation. The synthetic piezoelectric material of polylactic acid (PLLA) usually has good hydrophobicity, which can avoid sticking to the wound. The size of the piezoelectric layer 4 is smaller than that of the dressing layer 2, and the thickness of the piezoelectric layer 4 is 0.5 mm. Due to the chemical inertness and hydrophobicity of the polylactic acid film, the wound exudate will flow to the edge of the polylactic acid film and be absorbed by the dressing layer 2, without causing the skin around the wound to be soaked. Moreover, the chemical inertness of the polylactic acid film prevents the wound tissue from sticking to the dressing. The mechanism of piezoelectric materials includes surface potential effect, piezoelectric effect and piezoelectric catalysis effect. The present application mainly uses materials with surface potential effect and piezoelectric effect to make a film and a foam dressing. When the piezoelectric material contacts the skin, the surface potential changes or is subjected to external pressure, and a micro-current is generated automatically. When the dressing is attached to the skin, pressure is generated on the piezoelectric layer 4, and a micro-current is generated. When the piezoelectric material contacts the wound, the surface potential changes and a micro-current is generated, which restores the endogenous electric field of the wound, thereby promoting the proliferation and migration of nerve cells and fibroblasts, and accelerating the wound healing speed. The piezoelectric layer 4 releases electric current to restore the endogenous electric field of the wound, promote wound healing, and the dressing layer 2 absorbs the exudate on the surface of the wound to prevent the skin around the wound from being soaked.

[0031] The material of the release layer 5 is Graesin release paper, which has good insulation performance and is easy to peel off when the dressing is used. The square meter gram weight of the release layer 5 is between 40 g / m2 and 150 g / m2. The thickness of the protective layer 1 is 20 μm, the thickness of the dressing layer 2 is 2 mm, and the square meter gram weight of the adhesive layer 3 is 40 g / m2. The adhesive layer 3 is made of polyacrylate pressure-sensitive adhesive, which has good adhesive strength. Through holes are formed on the adhesive layer 3 to form an exudate absorption channel, which avoids the adverse effect of the adhesive layer 3 on the water absorption performance of the dressing. The diameter of the through hole is between 1 mm and 2 mm, and the ratio of the area of the through hole to the area of the adhesive layer 3 is greater than or equal to one half.

[0032] The implementation principle of the embodiment of the present application is that a material with surface potential effect and piezoelectric effect is used to make a film and a foam dressing composite. When the piezoelectric material contacts the skin, the surface potential changes or is subjected to external pressure, and a micro-current is automatically generated. When the dressing is pasted on the skin, pressure is generated on the piezoelectric layer 4 to generate a micro-current, or the piezoelectric material contacts the wound, the surface potential changes to generate a micro-current, and the endogenous electric field at the wound is restored, thereby promoting the proliferation and migration of nerve cells and fibroblasts, accelerating the wound healing speed, the piezoelectric layer 4 releases the current, restores the endogenous electric field at the wound, promotes the wound healing, and the dressing layer 2 absorbs the exudate on the surface of the wound to prevent the skin around the wound from being soaked.

[0033] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A microcurrent lathering patch comprising a protective layer (1), characterized in that: The bottom side of the protective layer (1) is provided with a dressing layer (2), the bottom side of the dressing layer (2) is provided with a adhesive layer (3), the bottom side of the adhesive layer (3) is provided with a piezoelectric layer (4), and the bottom side of the piezoelectric layer (4) is provided with a release layer (5).

2. A microcurrent lathering patch according to claim 1, wherein: The material of the protective layer (1) is polyurethane film, and the material of the adhesive layer (3) is polyacrylate pressure-sensitive adhesive.

3. A microcurrent lathering patch according to claim 1, wherein: The square meter gram weight of the adhesive layer (3) is between 10g / m2 and 150g / m2, and the material of the dressing layer (2) is polyurethane.

4. A microcurrent lathering patch according to claim 1, wherein: The pore size of the dressing layer (2) is between 20um and 500um, and the thickness of the dressing layer (2) is between 1mm and 3mm.

5. A microcurrent lathering patch according to claim 1, wherein: The material of the piezoelectric layer (4) is left-handed polylactic acid, the size of the piezoelectric layer (4) is smaller than that of the dressing layer (2), the thickness of the piezoelectric layer (4) is 0.5mm, and the material of the release layer (5) is Gerasin release paper.

6. A microcurrent lathering patch according to claim 1, wherein: The square meter gram weight of the release layer (5) is between 40g / m2 and 150g / m2, and the thickness of the protective layer (1) is 20um.

7. A microcurrent lathering patch according to claim 1, wherein: The thickness of the dressing layer (2) is 2mm, and the square meter gram weight of the adhesive layer (3) is 40g / m2.

Images