Wound dressing

Abstract

The utility model relates to a wound dressing which comprises a base material layer, a liquid absorption layer and a diffusion layer which are sequentially stacked, the diffusivity of wound exudate on the diffusion layer is larger than that of the wound exudate on the liquid absorption layer, and the diffusion layer is used for diffusing the wound exudate and then conducting the wound exudate to the liquid absorption layer. After the wound exudate is in contact with the diffusion layer, the wound exudate diffuses in the diffusion layer and then is conducted to the imbibition layer after diffusion, and the diffusivity of the wound exudate in the diffusion layer is larger than that of the wound exudate in the imbibition layer, so that the diffusion area of the wound exudate in the diffusion layer is larger than that of the wound exudate in the imbibition layer; therefore, the wound exudate is diffused through the diffusion layer and then conducted to the exudate absorption layer, the absorption area of the exudate absorption layer is larger, the peripheral area of the exudate absorption layer can also absorb the wound exudate, the utilization rate of the exudate absorption layer is higher, and the exudate absorption capacity of the exudate absorption layer can be fully utilized.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical supplies, in particular to a wound dressing. Background Art

[0002] Wound dressings are wound dressings used to cover sores, wounds or other lesions. Common wound dressings include medical wound dressings such as sterile dressings or silicone gel foam dressings. The structure of wound dressings includes a base layer, an absorbent layer and a skin contact surface layer. However, there is a problem with current wound dressings. After the absorbent layer absorbs wound exudate, the liquid accumulates on a very small area of ​​the absorbent layer around the wound and rarely diffuses around the absorbent layer. The utilization rate of the absorbent layer is very low. When the dressing is often removed, the peripheral area of ​​the absorbent layer has not absorbed any wound exudate at all.

[0003] Existing products often only focus on whether the absorbent layer has a large enough absorbent capacity to completely absorb wound exudate, but do not pay attention to how to fully utilize the absorbent capacity of the absorbent layer. Therefore, manufacturers will use a thicker absorbent layer. Since the wound exudate accumulates on the small absorbent layer around the wound, and the absorbent layer is relatively thick, the air permeability of the wound dressing becomes poor, which is not conducive to the evaporation of water in the exudate, and it is easy to cause immersion and whitening around the wound, making it difficult for the wound to heal, and even causing wound infection.

[0004] Therefore, it is necessary to develop a new wound dressing to improve the utilization rate of the liquid-absorbing layer and make full use of the liquid-absorbing capacity of the liquid-absorbing layer. Utility Model Content

[0005] The main purpose of the utility model is to provide a wound dressing, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A wound dressing comprises a substrate layer, a liquid absorbing layer and a diffusion layer which are stacked in sequence. The diffusibility of wound exudate in the diffusion layer is greater than that in the liquid absorbing layer. The diffusion layer is used for diffusing the wound exudate and then conducting it to the liquid absorbing layer.

[0008] Optionally, the diffusion layer is an ultra-fine fiber non-woven fabric.

[0009] Optionally, the single filament fineness of the ultrafine fiber non-woven fabric is 0.05-0.5 dtex.

[0010] Optionally, the substrate layer is a polyurethane film coated with an adhesive, a waterproof non-woven fabric or a breathable polymer film.

[0011] Optionally, the liquid-absorbing layer is a non-woven liquid-absorbing pad or a liquid-absorbing foam.

[0012] Optionally, the liquid-absorbing layer is a double-layer structure, the side in contact with the diffusion layer is liquid-absorbing foam, and the side in contact with the substrate layer is a non-woven liquid-absorbing pad.

[0013] Optionally, a release paper is stacked on the diffusion layer.

[0014] Optionally, a skin contact surface layer is laminated on the diffusion layer.

[0015] Optionally, the skin contact surface layer is an anti-adhesion isolation film or a silicone gel perforated film.

[0016] Optionally, a release paper is laminated on the skin contact surface layer.

[0017] The utility model provides a wound dressing having the following beneficial effects:

[0018] After the wound exudate contacts the diffusion layer, the wound exudate diffuses in the diffusion layer and then is conducted to the absorption layer. Since the diffusivity of the wound exudate in the diffusion layer is greater than that in the absorption layer, the diffusion area of ​​the wound exudate in the diffusion layer is greater than that in the absorption layer. Therefore, the wound exudate is first diffused through the diffusion layer and then conducted to the absorption layer. The absorption area of ​​the absorption layer is also larger, and the peripheral area of ​​the absorption layer can also absorb the wound exudate. The utilization rate of the absorption layer is higher, and the absorption capacity of the absorption layer can be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the utility model.

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Reference Figure 1 A wound dressing comprises a substrate layer 1, a liquid absorbing layer 2 and a diffusion layer 3 which are stacked in sequence, wherein the diffusibility of wound exudate in the diffusion layer 3 is greater than the diffusibility of wound exudate in the liquid absorbing layer 2, and the diffusion layer 3 is used to conduct the wound exudate to the liquid absorbing layer 2 after diffusion.

[0029] After the wound exudate contacts the diffusion layer 3, the wound exudate diffuses in the diffusion layer 3 and then is conducted to the absorbent layer 2. Since the diffusivity of the wound exudate in the diffusion layer 3 is greater than that in the absorbent layer 2, the diffusion area of ​​the wound exudate in the diffusion layer 3 is greater than the diffusion area of ​​the wound exudate in the absorbent layer 2. Therefore, the wound exudate is first diffused through the diffusion layer 3 and then conducted to the absorbent layer 2. The area absorbed by the absorbent layer 2 is also larger, and the peripheral area of ​​the absorbent layer 2 can also absorb the wound exudate. The utilization rate of the absorbent layer 2 is higher, and the absorbent capacity of the absorbent layer 2 can be fully utilized. Then, the thickness of the absorbent layer 2 can also be appropriately reduced, thereby improving the air permeability of the wound dressing. After the wound exudate is fully diffused, the accumulation of the wound exudate around the wound can be effectively reduced. In addition, as the thickness of the absorbent layer 2 is reduced, the moisture in the wound exudate can fully pass through the substrate layer 1 and evaporate, thereby reducing the humidity around the wound and facilitating wound healing.

[0030] In a specific embodiment, the diffusion layer 3 is an ultrafine fiber nonwoven fabric, which has excellent liquid diffusivity, allowing the wound exudate to be fully diffused in the diffusion layer 3, and the ultrafine fiber nonwoven fabric has a smooth surface and good anti-adhesion properties, and can directly contact the wound to a certain extent.

[0031] In a specific embodiment, the single filament fineness of the ultrafine fiber nonwoven fabric is 0.05-0.5 dtex. Preferably, the ultrafine fiber nonwoven fabric of this embodiment can be the ultrafine fiber nonwoven fabric disclosed in Japanese Patent JP6607609B2.

[0032] In a specific embodiment, the substrate layer 1 is a polyurethane film, a waterproof non-woven fabric or a breathable polymer film coated with an adhesive, and the adhesive is preferably a medical pressure-sensitive adhesive.

[0033] In a specific embodiment, the liquid absorbent layer 2 is a non-woven liquid absorbent pad or a liquid absorbent foam. The non-woven liquid absorbent pad has poor absorption effect but low cost, while the liquid absorbent foam has good absorption effect but relatively high cost. The liquid absorbent foam is preferably polyurethane foam.

[0034] In a specific embodiment, the liquid absorbent layer 2 is a double-layer structure, the side in contact with the diffusion layer 3 is a liquid absorbent foam 2.1, and the side in contact with the substrate layer 1 is a non-woven liquid absorbent pad 2.2. This solution is a compromise solution of the above solution. The liquid absorbent layer 2 has a moderate absorption effect and a moderate cost. The specific structure of the liquid absorbent layer can be selected according to actual needs.

[0035] In a specific embodiment, a release paper 5 is laminated on the diffusion layer 3. The release paper 5 plays a protective role. The release paper 5 is torn off when the wound dressing is used. The release paper 5 is preferably glassine release paper, polyvinyl chloride film or PET film.

[0036] In a specific embodiment, a skin contact surface layer 4 is stacked on the diffusion layer 3. The skin contact surface layer 4 needs to have good anti-adhesion properties and can penetrate wound exudate. The skin contact surface layer 4 is provided to facilitate contact with the wound and not adhere to the wound.

[0037] Preferably, the skin contact surface layer 4 is an anti-adhesion isolation film or a silicone gel perforated film.

[0038] Preferably, a release paper 5 is laminated on the skin contact surface layer 4 .

[0039] Embodiment 1

[0040] Reference Figure 2 In this embodiment, the wound dressing has no skin contact surface layer 4 , and the release paper 5 is stacked on the diffusion layer 3 .

[0041] Embodiment 2

[0042] Reference Figure 3 The wound dressing of this embodiment has a skin contact surface layer 4, a release paper 5 is stacked on the skin contact surface layer 4, and the skin contact surface layer 4 is an anti-adhesion isolation film.

[0043] Embodiment 3

[0044] Reference Figure 4 The wound dressing of this embodiment has a skin contact surface layer 4, a release paper 5 is stacked on the skin contact surface layer 4, and the skin contact surface layer 4 is a silicone gel perforated film.

[0045] Embodiment 4

[0046] Reference Figure 1 The wound dressing of this embodiment has a skin contact surface layer 4, a release paper 5 is stacked on the skin contact surface layer 4, the skin contact surface layer 4 is a silicone gel perforated film, and the liquid absorbent layer 2 is a double-layer structure, the side in contact with the diffusion layer 3 is a liquid absorbent foam 2.1, and the side in contact with the substrate layer 1 is a non-woven liquid absorbent pad 2.2.

[0047] Embodiment 5

[0048] Reference Figure 5 The wound dressing of this embodiment has a skin contact surface layer 4, a release paper 5 is stacked on the skin contact surface layer 4, the skin contact surface layer 4 is a silicone gel perforated film, and the liquid absorbent layer 2 is a double-layer structure, the side in contact with the diffusion layer 3 is a liquid absorbent foam 2.1, and the side in contact with the substrate layer 1 is a non-woven liquid absorbent pad 2.2. This embodiment is used as a supplementary scheme of the utility model when the skin contact surface layer 4 is a silicone gel perforated film and the pore size of the silicone gel perforated film is too large. The diffusion layer 3 is placed between the liquid absorbent foam 2.1 and the non-woven liquid absorbent pad 2.2 to prevent the wound from adhering to the diffusion layer 3 through the holes.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wound dressing, characterized in that: The invention comprises a substrate layer, a liquid absorption layer and a diffusion layer which are stacked in sequence. The diffusibility of wound exudate in the diffusion layer is greater than that in the liquid absorption layer. The diffusion layer is used for diffusing the wound exudate and then conducting it to the liquid absorption layer.

2. A wound dressing according to claim 1, characterized in that: The diffusion layer is made of ultra-fine fiber non-woven fabric.

3. A wound dressing according to claim 2, characterized in that: The single filament fineness of the ultrafine fiber nonwoven fabric is 0.05-0.5 dtex.

4. A wound dressing according to claim 1, characterized in that: The substrate layer is a polyurethane film, a waterproof non-woven fabric or a breathable polymer film coated with an adhesive.

5. A wound dressing according to claim 1, characterized in that: The liquid absorbing layer is a non-woven liquid absorbing pad or a liquid absorbing foam.

6. A wound dressing according to claim 1, characterized in that: The liquid-absorbing layer is a double-layer structure, the side in contact with the diffusion layer is liquid-absorbing foam, and the side in contact with the substrate layer is a non-woven liquid-absorbing pad.

7. A wound dressing according to claim 1, characterized in that: A release paper is stacked on the diffusion layer.

8. A wound dressing according to claim 1, characterized in that: A skin contact surface layer is laminated on the diffusion layer.

9. A wound dressing according to claim 8, characterized in that: The skin contact surface layer is an anti-adhesion isolation film or a silicone gel perforated film.

10. A wound dressing according to claim 8, characterized in that: The skin contact surface layer is laminated with release paper.

Images